Physical downlink shared channel receiving and sending method, equipment, device and medium
阅读说明：本技术 物理下行共享信道接收、发送方法及设备、装置、介质 (Physical downlink shared channel receiving and sending method, equipment, device and medium ) 是由 高雪娟 于 2020-04-30 设计创作，主要内容包括：本发明公开了一种物理下行共享信道接收、发送方法及设备、装置、介质,包括：终端接收调度多个载波进行物理下行共享信道传输的下行控制信息；根据参考子载波间隔或者多个载波各自的子载波间隔,确定多个载波上的物理下行共享信道传输所在的时间单元；在多个载波上的确定的时间单元中,接收被调度的物理下行共享信道。基站发送下行控制信息,在多个载波上传输物理下行共享信道的时间单元中发送被调度的物理下行共享信道,其中,确定终端根据参考子载波间隔或者多个载波各自的子载波间隔,确定多个载波上的物理下行共享信道传输所在的时间单元。采用本发明,可以保证一个下行控制信息调度多个载波上进行物理下行共享信道传输时的正常传输。(The invention discloses a method, a device and a medium for receiving and sending a physical downlink shared channel, which comprises the following steps: a terminal receives downlink control information for scheduling a plurality of carriers to carry out physical downlink shared channel transmission; determining a time unit in which the physical downlink shared channel on the multiple carriers is transmitted according to the reference subcarrier interval or the respective subcarrier intervals of the multiple carriers; receiving a scheduled physical downlink shared channel in a determined time unit on a plurality of carriers. The base station sends downlink control information, and sends the scheduled physical downlink shared channel in a time unit for transmitting the physical downlink shared channel on a plurality of carriers, wherein the determining terminal determines the time unit for transmitting the physical downlink shared channel on the plurality of carriers according to a reference subcarrier interval or the respective subcarrier intervals of the plurality of carriers. The invention can ensure the normal transmission when one downlink control information schedules a plurality of carriers to carry out the transmission of the physical downlink shared channel.)
1. A method for receiving a Physical Downlink Shared Channel (PDSCH) is characterized by comprising the following steps:
receiving first Downlink Control Information (DCI), the first DCI scheduling PDSCH transmission on a plurality of carriers;
determining time units where PDSCH transmission on the multiple carriers is located according to a reference subcarrier interval SCS or respective SCS of the multiple carriers;
receiving the scheduled PDSCH in the determined time unit on the plurality of carriers.
2. The method of claim 1, wherein the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
3. The method of claim 1, wherein receiving the scheduled PDSCH in the determined time unit on the plurality of carriers comprises:
respectively determining a time domain symbol set transmitted by the PDSCH on each carrier of the plurality of carriers in a determined time unit according to a starting symbol and a transmission length determined by an indication field in the first DCI;
receiving the PDSCH in the determined set of time domain symbols.
4. The method of claim 1, wherein the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
5. The method according to any of claims 1 to 4, wherein when determining the time unit in which the PDSCH transmission on the multiple carriers is located according to the reference SCS or the respective SCS of the multiple carriers, further comprising: determining a time unit in which the PDSCH on the plurality of carriers is transmitted according to a time unit offset and with reference to SCS or SCS of each of the plurality of carriers.
6. The method of claim 5, wherein determining the time units in which the PDSCH transmissions on the plurality of carriers are based on one time unit offset and with reference to SCS comprises:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
7. The method of claim 6, wherein the PDSCH is determined to be transmitted in each of the overlapping time units, or the PDSCH is determined to be transmitted in a first or last time unit, when there are multiple time units that overlap the reference time unit on each of the plurality of carriers being scheduled.
8. The method of claim 7, wherein determining the time units in which the PDSCH transmissions on the multiple carriers are based on one time unit offset and with reference to SCS comprises one of:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
9. The method of claim 7, wherein if there are multiple time units overlapping the reference time unit, determining that the PDSCH is transmitted in each of the overlapping time units, or determining that the PDSCH is transmitted in a first or last time unit.
10. The method of claim 5, wherein determining the time units in which the PDSCH transmissions on the plurality of carriers are based on a time unit offset and the SCS of each of the plurality of carriers comprises:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
11. The method of any of claims 5 to 10, wherein the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
12. The method of claim 11, wherein the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the PDSCH is scheduled to be transmitted.
13. The method of any of claims 5 to 10, wherein the time unit offset is determined by an indication field in the first DCI or is configured by higher layer signaling.
14. The method of any of claims 5 to 10, wherein the time unit offset is shared for the PDSCH on the multiple carriers.
15. A PDSCH transmitting method, comprising:
transmitting a first DCI, the first DCI scheduling a plurality of carriers for PDSCH transmission;
and sending the scheduled PDSCH in the time unit for transmitting the PDSCH on the plurality of carriers, wherein the determining terminal determines the time unit for transmitting the PDSCH on the plurality of carriers according to the reference SCS or the respective SCS of the plurality of carriers.
16. The method of claim 15, wherein the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
17. The method of claim 15, wherein transmitting the scheduled PDSCH in time units in which the PDSCH is transmitted on the plurality of carriers comprises:
and respectively transmitting the PDSCH in a time domain symbol set consisting of a starting symbol indicated by the indication field in the first DCI and a transmission length in a time unit for transmitting the PDSCH on each carrier of the plurality of carriers.
18. The method of claim 15, wherein when the time unit offset is indicated by an indication field in the first DCI, prior to transmitting the first DCI, further comprising:
the method comprises the steps of determining a time unit in which PDSCHs on a plurality of carriers scheduled by first DCI are transmitted on each carrier, and determining a time unit offset indicated in the first DCI based on the time unit and a reference SCS or respective SCSs of the plurality of scheduled carriers.
19. The method of claim 15, wherein before transmitting the scheduled PDSCH in the time unit in which the PDSCH is transmitted on the plurality of carriers when the time unit offset is pre-configured by higher layer signaling, further comprising:
and determining the time unit where the PDSCH on the plurality of carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the plurality of carriers.
20. The method of claim 15, wherein the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
21. The method according to one of claims 15 to 20, wherein when determining that the terminal determines the time unit in which the PDSCH transmission on the multiple carriers is located according to the reference SCS or the SCS of each of the multiple carriers, further comprising: and the determining terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the multiple carriers.
22. The method of claim 21, wherein determining the time unit in which the terminal determines the PDSCH transmission on the plurality of carriers based on a time unit offset and with reference to SCS comprises:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
23. The method of claim 22, wherein when there are multiple time units on each of the scheduled multiple carriers that overlap with the reference time unit, determining that the PDSCH is transmitted in each of the overlapping time units, or determining that the PDSCH is transmitted in a first or last time unit thereof.
24. The method of claim 22, wherein determining the time unit in which the terminal determines the PDSCH transmission on the multiple carriers based on a time unit offset and with reference to SCS comprises one of:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
25. The method of claim 24, wherein if there are multiple time units overlapping the reference time unit, determining that the PDSCH is transmitted in each of the overlapping time units, or determining that the PDSCH is transmitted in a first or last time unit thereof.
26. The method of claim 21, wherein determining the time unit in which the PDSCH transmission on the plurality of carriers is based on a time unit offset and the SCS of each of the plurality of carriers comprises:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
27. The method of any of claims 21 to 26, wherein the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
28. The method of claim 27, wherein the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the PDSCH is scheduled to be transmitted.
29. The method of any of claims 21 to 26, wherein the time unit offset is determined by an indication field in the first DCI or is configured by higher layer signaling.
30. The method of any of claims 21 to 26, wherein the time unit offset is shared for the PDSCH on the multiple carriers.
31. A terminal, comprising:
a processor for reading the program in the memory, performing the following processes:
receiving first DCI, the first DCI scheduling PDSCH transmission on a plurality of carriers;
determining time units where PDSCHs on the multiple carriers are transmitted according to a reference SCS or respective SCSs of the multiple carriers;
receiving a scheduled PDSCH in a determined time unit on the plurality of carriers;
a transceiver for receiving and transmitting data under the control of the processor.
32. The terminal of claim 31, wherein the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
33. The terminal of claim 31, wherein receiving the scheduled PDSCH in the determined time unit on the plurality of carriers comprises:
respectively determining a time domain symbol set transmitted by the PDSCH on each carrier of the plurality of carriers in a determined time unit according to a starting symbol and a transmission length determined by an indication field in the first DCI;
receiving the PDSCH in the determined set of time domain symbols.
34. The terminal of claim 31, wherein the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
35. The terminal according to one of claims 31 to 34, wherein when determining the time unit in which the PDSCH transmission on the multiple carriers is located according to the reference SCS or the SCS of each of the multiple carriers, the method further comprises: determining a time unit in which the PDSCH on the plurality of carriers is transmitted according to a time unit offset and with reference to SCS or SCS of each of the plurality of carriers.
36. The terminal of claim 35, wherein determining the time units in which PDSCH transmissions on the plurality of carriers are based on a time unit offset and with reference to SCS comprises:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
37. The terminal of claim 36, wherein when there are multiple time units on each of the scheduled multiple carriers that overlap with the reference time unit, the PDSCH is determined to be transmitted in each of the overlapping time units, or the PDSCH is determined to be transmitted in a first or last time unit thereof.
38. The terminal of claim 37, wherein determining the time units in which PDSCH transmissions on the multiple carriers are based on a time unit offset and with reference to SCS comprises one of:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
39. The terminal of claim 37, wherein if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in a first or last time unit thereof.
40. The terminal of claim 35, wherein determining the time units in which PDSCH transmissions on the plurality of carriers are based on a time unit offset and the SCS of each of the plurality of carriers comprises:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
41. The terminal of any of claims 35 to 40, wherein the time unit offset is a time unit offset between the first DCI and the scheduled PDSCH.
42. The terminal of claim 41, wherein the time unit offset is a time unit interval between a time unit in which the first DCI transmission is located and a time inner unit in which the PDSCH transmission is scheduled.
43. The terminal of any of claims 35 to 40, wherein the time unit offset is determined by an indication field in the first DCI or is configured by higher layer signaling.
44. The terminal of any of claims 35 to 40, wherein the time unit offset is shared for PDSCH on the multiple carriers.
45. A base station, comprising:
a processor for reading the program in the memory, performing the following processes:
transmitting a first DCI, the first DCI scheduling a plurality of carriers for PDSCH transmission;
transmitting the scheduled PDSCH in the time units for transmitting the PDSCH on the plurality of carriers, wherein the time units for transmitting the PDSCH on the plurality of carriers are determined by the determining terminal according to the reference SCS or the respective SCS of the plurality of carriers;
a transceiver for receiving and transmitting data under the control of the processor.
46. The base station of claim 45, wherein the reference SCS is one of the following SCSs:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
47. The base station of claim 45, wherein transmitting the scheduled PDSCH in time units in which the PDSCH is transmitted on the plurality of carriers comprises:
and respectively transmitting the PDSCH in a time domain symbol set consisting of a starting symbol indicated by the indication field in the first DCI and a transmission length in a time unit for transmitting the PDSCH on each carrier of the plurality of carriers.
48. The base station of claim 45, when the time unit offset is indicated by an indication field in the first DCI, further comprising, prior to transmitting the first DCI:
the method comprises the steps of determining a time unit in which PDSCHs on a plurality of carriers scheduled by first DCI are transmitted on each carrier, and determining a time unit offset indicated in the first DCI based on the time unit and a reference SCS or respective SCSs of the plurality of scheduled carriers.
49. The base station of claim 45, wherein when the time unit offset is pre-configured by higher layer signaling, prior to transmitting the scheduled PDSCH in the time unit of PDSCH transmission on the plurality of carriers, further comprising:
and determining the time unit where the PDSCH on the plurality of carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the plurality of carriers.
50. The base station of claim 45, wherein the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
51. The base station of any of claims 45 to 50, wherein when determining that the terminal determines the time unit in which the PDSCH transmission on the multiple carriers is located according to the reference SCS or the respective SCS of the multiple carriers, further comprising: and the determining terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the multiple carriers.
52. The base station of claim 51, wherein determining the time unit in which the terminal determines the PDSCH transmissions on the multiple carriers based on a time unit offset and with reference to SCS comprises:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
53. The base station of claim 52, wherein when there are multiple time units on each of the plurality of carriers being scheduled that overlap the reference time unit, the PDSCH is determined to be transmitted in each of the overlapping time units, or the PDSCH is determined to be transmitted in a first or last time unit thereof.
54. The base station of claim 52, wherein determining the time unit in which the terminal determines the PDSCH transmission on the multiple carriers according to a time unit offset and with reference to SCS comprises one of:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
55. The base station of claim 54, wherein if there are multiple time units that overlap with the reference time unit, determining that the PDSCH is transmitted in each of the overlapping time units, or determining that the PDSCH is transmitted in a first or last time unit.
56. The base station of claim 51, wherein determining the time unit in which the terminal determines the PDSCH transmission on the multiple carriers according to a time unit offset and the SCS of each of the multiple carriers comprises:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
57. The base station of any of claims 51 to 56, wherein the time unit offset is a time unit offset between the first DCI and the scheduled PDSCH.
58. The base station of claim 57, wherein the time unit offset is a time unit interval between a time unit in which the first DCI transmission is located and a time inner unit in which the PDSCH transmission is scheduled.
59. The base station of any of claims 51 to 56, wherein the time unit offset is determined by an indication field in the first DCI or is configured by higher layer signaling.
60. The base station of any of claims 51 to 56, wherein the time unit offset is shared for PDSCH on the plurality of carriers.
61. A PDSCH receiving apparatus, comprising:
a first receiving module, configured to receive a first DCI, where the first DCI schedules PDSCH transmission on multiple carriers;
a determining module, configured to determine, according to a reference SCS or an SCS of each of the multiple carriers, a time unit in which PDSCH on the multiple carriers is transmitted;
a second receiving module for receiving the scheduled PDSCH in the determined time unit on the plurality of carriers.
62. A PDSCH transmitting apparatus, comprising:
a first sending module, configured to send a first DCI, where the first DCI schedules a plurality of carriers for PDSCH transmission;
and a second sending module, configured to send the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, where the determining terminal determines the time unit in which the PDSCH on the multiple carriers is transmitted according to a reference SCS or respective SCS of the multiple carriers.
63. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 30.
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, a device, and a medium for receiving and transmitting a physical downlink shared channel.
Background
A New wireless communication system, i.e. 5G NR (fifth Generation New Radio Access Technology, 5Generation New RAT; RAT: Radio Access Technology), supports flexible timing relationships. For PDSCH (Physical Downlink Shared CHannel), PDCCH (Physical Downlink Control CHannel) carrying its Scheduling information indicates Scheduling timing (K0) between PDSCH and PDCCH and feedback timing (HARQ-ACK timing, K1) between PDSCH and its corresponding HARQ-ACK (Hybrid automatic repeat request acknowledgement).
Specifically, a Time Domain Resource Allocation (TDRA) indication field in a Downlink Control Information (DCI) format used by the PDCCH indicates a Time slot offset K0 between a Time slot in which the PDSCH is located and a Time slot in which the PDCCH (or the DCI, which is a specific transmission format of the PDCCH, is considered equivalent in describing scheduling and feedback relationships) is located. The PDSCH-to-HARQ-ACK feedback timing (PDSCH-to-HARQ _ feedback timing) indication field in the DCI format indicates the number of slots K1 from the end of the PDSCH to the start of the HARQ-ACK, i.e., the PDSCH transmitted in slot n performs HARQ-ACK transmission in slot n + K1, and fig. 1 is a schematic diagram of a downlink scheduling timing and an HARQ-ACK feedback timing, as shown in fig. 1.
Specifically, DCI transmitted in time slot n is scheduled in time slotIn transmitting PDSCH, where K0is defined based on PDSCH numerology (baseband parameters, some list of parameters that may include subcarrier spacing), i.e., K0 ═ 1 denotes a PDSCH numerology defined slot, μPDSCHIs the subcarrier spacing, mu, of PDSCHPDCCHIs the subcarrier spacing of the PDCCH (i.e., the channel carrying this DCI).
The above formula shows that if the subcarrier spacing of PDCCH and PDSCH is different (for example, when PDCCH and PDSCH are transmitted on different carriers, that is, when DCI schedules PDSCH transmission on one carrier across carriers), D will be transmitted according to the sub-carrier space difference between the two SCSThe number of the time slot n of the CI is converted into the number of one time slot under the SCS corresponding to the PDSCH and the number is used as a reference time slotThen in this reference time slotOn the basis, the time slot where the PDSCH is transmitted is obtained by offsetting K0 time slots, fig. 2 is a schematic diagram of the time slot when the time slot is offset by K0, and the offset is as shown in fig. 2.
Currently, only one PDSCH transmission on one carrier can be scheduled by one PDCCH, and the PDSCH and the PDCCH may be on the same carrier (i.e. local carrier scheduling) or different carriers (i.e. cross-carrier scheduling).
The prior art is disadvantageous in that when one DCI can simultaneously schedule PDSCH on multiple carriers for transmission, there is no scheme that can determine PDSCH transmission slots on multiple carriers according to the same scheduling timing (i.e., K0) value notified in the DCI.
Disclosure of Invention
The invention provides a method, equipment, a device and a medium for receiving and sending a physical downlink shared channel (PDCCH), which are used for providing a technical scheme that when one DCI can simultaneously schedule PDSCHs on a plurality of carriers for transmission, PDSCH transmission time slots on the plurality of carriers can be determined according to the same scheduling time sequence (namely K0) value notified in the DCI.
The embodiment of the invention provides a PDSCH receiving method, which comprises the following steps:
receiving first DCI, the first DCI scheduling PDSCH transmission on a plurality of carriers;
determining time units where PDSCHs on the multiple carriers are transmitted according to a reference SCS or respective SCSs of the multiple carriers;
receiving the scheduled PDSCH in the determined time unit on the plurality of carriers.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, receiving a scheduled PDSCH in a determined time unit on the plurality of carriers includes:
respectively determining a time domain symbol set transmitted by the PDSCH on each carrier of the plurality of carriers in a determined time unit according to a starting symbol and a transmission length determined by an indication field in the first DCI;
receiving the PDSCH in the determined set of time domain symbols.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when the determining, according to the reference SCS or the SCS of each of the plurality of carriers, the time unit where the PDSCH transmission on the plurality of carriers is located, further includes: determining a time unit in which the PDSCH on the plurality of carriers is transmitted according to a time unit offset and with reference to SCS or SCS of each of the plurality of carriers.
In an implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to a time unit offset and with reference to SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In an implementation, when there are multiple time units overlapping the reference time unit on each of the scheduled multiple carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to one time unit offset and with reference to the SCS includes one of the following ways:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
In practice, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
In an implementation, determining a time unit where PDSCH transmission on the plurality of carriers is located according to a time unit offset and SCS of each of the plurality of carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In an implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
The embodiment of the invention provides a PDSCH sending method, which comprises the following steps:
transmitting a first DCI, the first DCI scheduling a plurality of carriers for PDSCH transmission;
and sending the scheduled PDSCH in the time unit for transmitting the PDSCH on the plurality of carriers, wherein the determining terminal determines the time unit for transmitting the PDSCH on the plurality of carriers according to the reference SCS or the respective SCS of the plurality of carriers.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, transmitting a scheduled PDSCH in a time unit in which the PDSCH is transmitted on the plurality of carriers includes:
and respectively transmitting the PDSCH in a time domain symbol set consisting of a starting symbol indicated by the indication field in the first DCI and a transmission length in a time unit for transmitting the PDSCH on each carrier of the plurality of carriers.
In an implementation, when the time unit offset is indicated by an indication field in the first DCI, before transmitting the first DCI, the method further includes:
the method comprises the steps of determining a time unit in which PDSCHs on a plurality of carriers scheduled by first DCI are transmitted on each carrier, and determining a time unit offset indicated in the first DCI based on the time unit and a reference SCS or respective SCSs of the plurality of scheduled carriers.
In an implementation, when the time unit offset is pre-configured by higher layer signaling, before transmitting the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, the method further includes:
and determining the time unit where the PDSCH on the plurality of carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the plurality of carriers.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when determining that the terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the reference SCS or the SCS of each of the multiple carriers, the method further includes: and the determining terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the multiple carriers.
In implementation, determining the time unit in which the PDSCH transmission on the multiple carriers is located by the terminal according to a time unit offset and with reference to the SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In an implementation, when there are multiple time units overlapping the reference time unit on each of the scheduled multiple carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In implementation, the determining, by the terminal, the time unit in which the PDSCH transmission on the multiple carriers is located according to one time unit offset and with reference to the SCS includes one of the following manners:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
In practice, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
In implementation, determining, by the terminal, the time unit in which the PDSCH on the multiple carriers is transmitted according to a time unit offset and the SCS of each of the multiple carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In an implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
An embodiment of the present invention provides a terminal, including:
a processor for reading the program in the memory, performing the following processes:
receiving first DCI, the first DCI scheduling PDSCH transmission on a plurality of carriers;
determining time units where PDSCHs on the multiple carriers are transmitted according to a reference SCS or respective SCSs of the multiple carriers;
receiving a scheduled PDSCH in a determined time unit on the plurality of carriers;
a transceiver for receiving and transmitting data under the control of the processor.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, receiving a scheduled PDSCH in a determined time unit on the plurality of carriers includes:
respectively determining a time domain symbol set transmitted by the PDSCH on each carrier of the plurality of carriers in a determined time unit according to a starting symbol and a transmission length determined by an indication field in the first DCI;
receiving the PDSCH in the determined set of time domain symbols.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when the determining, according to the reference SCS or the SCS of each of the plurality of carriers, the time unit where the PDSCH transmission on the plurality of carriers is located, further includes: determining a time unit in which the PDSCH on the plurality of carriers is transmitted according to a time unit offset and with reference to SCS or SCS of each of the plurality of carriers.
In an implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to a time unit offset and with reference to SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In an implementation, when there are multiple time units overlapping the reference time unit on each of the scheduled multiple carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to one time unit offset and with reference to the SCS includes one of the following ways:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
In practice, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
In an implementation, determining a time unit where PDSCH transmission on the plurality of carriers is located according to a time unit offset and SCS of each of the plurality of carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In an implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
An embodiment of the present invention provides a base station, including:
a processor for reading the program in the memory, performing the following processes:
transmitting a first DCI, the first DCI scheduling a plurality of carriers for PDSCH transmission;
transmitting the scheduled PDSCH in the time units for transmitting the PDSCH on the plurality of carriers, wherein the time units for transmitting the PDSCH on the plurality of carriers are determined by the determining terminal according to the reference SCS or the respective SCS of the plurality of carriers;
a transceiver for receiving and transmitting data under the control of the processor.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, transmitting a scheduled PDSCH in a time unit in which the PDSCH is transmitted on the plurality of carriers includes:
and respectively transmitting the PDSCH in a time domain symbol set consisting of a starting symbol indicated by the indication field in the first DCI and a transmission length in a time unit for transmitting the PDSCH on each carrier of the plurality of carriers.
In an implementation, when the time unit offset is indicated by an indication field in the first DCI, before transmitting the first DCI, the method further includes:
the method comprises the steps of determining a time unit in which PDSCHs on a plurality of carriers scheduled by first DCI are transmitted on each carrier, and determining a time unit offset indicated in the first DCI based on the time unit and a reference SCS or respective SCSs of the plurality of scheduled carriers.
In an implementation, when the time unit offset is pre-configured by higher layer signaling, before transmitting the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, the method further includes:
and determining the time unit where the PDSCH on the plurality of carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the plurality of carriers.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when determining that the terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the reference SCS or the SCS of each of the multiple carriers, the method further includes: and the determining terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the multiple carriers.
In implementation, determining the time unit in which the PDSCH transmission on the multiple carriers is located by the terminal according to a time unit offset and with reference to the SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In an implementation, when there are multiple time units overlapping the reference time unit on each of the scheduled multiple carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In implementation, the determining, by the terminal, the time unit in which the PDSCH transmission on the multiple carriers is located according to one time unit offset and with reference to the SCS includes one of the following manners:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
In practice, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
In implementation, determining, by the terminal, the time unit in which the PDSCH on the multiple carriers is transmitted according to a time unit offset and the SCS of each of the multiple carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In an implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
The embodiment of the invention provides a PDSCH receiving device, which comprises:
a first receiving module, configured to receive a first DCI, where the first DCI schedules PDSCH transmission on multiple carriers;
a determining module, configured to determine, according to a reference SCS or an SCS of each of the multiple carriers, a time unit in which PDSCH on the multiple carriers is transmitted;
a second receiving module for receiving the scheduled PDSCH in the determined time unit on the plurality of carriers.
The embodiment of the invention provides a PDSCH transmitting device, which comprises:
a first sending module, configured to send a first DCI, where the first DCI schedules a plurality of carriers for PDSCH transmission;
and a second sending module, configured to send the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, where the determining terminal determines the time unit in which the PDSCH on the multiple carriers is transmitted according to a reference SCS or respective SCS of the multiple carriers.
An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program for executing the above-described PDSCH receiving method and/or PDSCH transmitting method.
The invention has the following beneficial effects:
in the technical solution provided in the embodiment of the present invention, since the time unit where the PDSCH transmission on the multiple carriers scheduled by the first DCI is located is determined according to the reference SCS or the respective SCS of the multiple scheduled carriers, it can be ensured that the terminal and the base station understand consistently to determine the time unit where the PDSCH transmission on each carrier is located, thereby ensuring normal transmission when the PDSCH transmission is performed on the multiple carriers scheduled by one DCI.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a diagram illustrating a downlink scheduling timing and a HARQ-ACK feedback timing in the background art;
FIG. 2 is a diagram illustrating a time slot offset K0 in the prior art;
fig. 3 is a schematic flow chart of implementation of a PDSCH receiving method on a terminal side in an embodiment of the present invention;
fig. 4 is a schematic flow chart of implementation of a PDSCH transmitting method on a base station side in an embodiment of the present invention;
fig. 5 is a schematic diagram 1 of a DCI scheduling slot according to an embodiment of the present invention;
fig. 6 is a schematic diagram of DCI scheduling slots in an embodiment of the present invention 2;
fig. 7 is a schematic diagram of DCI scheduling slots in an embodiment of the present invention 3;
fig. 8 is a schematic diagram of DCI scheduling slots in an embodiment of the present invention 4;
fig. 9 is a schematic diagram 5 of DCI scheduling slots in an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a base station in an embodiment of the present invention.
Detailed Description
In order to increase the scheduling efficiency and save DCI overhead, a mode of scheduling multiple carriers by using one DCI is considered, that is, one DCI schedules PDSCH transmission on multiple carriers simultaneously. Considering that multiple carriers may have different baseband parameters (numerology, such as subcarrier spacing SCS, etc.), there is no explicit method on how to determine PDSCH transmission slots on each carrier based on the same scheduling timing (i.e., K0) value signaled in DCI on different carriers.
Based on this, in the scheme, when one DCI schedules PDSCH transmission on multiple carriers, the time unit of PDSCH transmission on each of the multiple carriers is determined according to a reference SCS or according to the respective SCS of the scheduled carriers, where the reference SCS may be an SCS corresponding to DCI transmission, a maximum value of SCS of the scheduled multiple carriers, and a minimum value of SCS of the scheduled multiple carriers.
The following describes embodiments of the present invention with reference to the drawings.
In the description process, the implementation of the terminal and the base station side will be described separately, and then an example of the implementation of the two in cooperation will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented in cooperation or separately, and actually, when the terminal and the base station are implemented separately, the problems on the terminal side and the base station side are solved separately, and when the two are used in combination, a better technical effect is obtained.
Fig. 3 is a schematic flowchart of an implementation of a PDSCH receiving method at a terminal side, as shown in the figure, the PDSCH receiving method may include:
step 301, receiving a first DCI, where the first DCI schedules PDSCH transmission on multiple carriers;
step 302, determining time units where PDSCH transmission on the plurality of carriers is located according to a reference SCS or respective SCS of the plurality of carriers;
step 303, receiving the scheduled PDSCH in the determined time unit on the plurality of carriers.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when the determining, according to the reference SCS or the SCS of each of the plurality of carriers, the time unit where the PDSCH transmission on the plurality of carriers is located, further includes: determining a time unit in which the PDSCH on the plurality of carriers is transmitted according to a time unit offset and with reference to SCS or SCS of each of the plurality of carriers.
In a specific implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to a time unit offset and with reference to the SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In a specific implementation, when there are multiple time units overlapping with the reference time unit on each of the multiple scheduled carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In a specific implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to a time unit offset and with reference to the SCS includes one of the following ways:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
Specifically, the following may be mentioned:
mode 1: when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit (namely, the reference time unit is the time unit on the carrier where the first DCI is transmitted) is determined according to the time unit where the first DCI is transmitted (namely, the DCI corresponds to the time unit determined by the SCS on the transmission carrier) and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier in the scheduled multiple carriers;
the time unit offset is a unit of a length of a time unit determined by the SCS of the first DCI, for example, if the time unit offset is 1, it means that the time unit is 1 time unit determined by the SCS of the first DCI.
Mode 2: when the reference SCS is the largest SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS of the plurality of carriers, according to the time unit (i.e. the time unit determined by the SCS corresponding to the SCS of the DCI on the transmission carrier) where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, the time unit (which may be one or more, if the time unit is more, the time slot determined on each carrier for transmitting the PDSCH is the same) for transmitting the PDSCH in the plurality of carriers is determined (i.e. the PDSCH is determined to be transmitted in the time unit on the carrier corresponding to the largest SCS), and the time unit is taken as the reference time unit (i.e. the time unit on the carrier corresponding to the reference SCS), on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers, determining to transmit a PDSCH in a time unit overlapping the reference time unit;
the time unit offset is a unit of a length of a time unit determined by a largest SCS of the multiple carriers, for example, if the time unit offset is 1, it means that the time unit is 1 determined by the largest SCS of the multiple carriers.
Mode 3: when the reference SCS is the smallest SCS among SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the smallest SCS among SCS of the plurality of carriers, according to the time unit (i.e. the time unit determined by the DCI corresponding to the SCS on the transmission carrier), the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit(s) corresponding to the smallest SCS among the plurality of carriers (may be one or more, if more, the time slot(s) determined on each carrier for transmitting PDSCH are the same) for transmitting PDSCH (i.e. determining to transmit PDSCH in the time unit on the carrier corresponding to the smallest SCS) and taking the time unit as the reference time unit (i.e. the time unit on the carrier corresponding to the reference SCS) on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers, determining to transmit a PDSCH in a time unit overlapping the reference time unit;
the time unit offset is a unit of a length of a time unit determined by the smallest SCS among SCS of the plurality of carriers, for example, if the time unit offset is 1, it means that the time unit determined by the smallest SCS among SCS of the plurality of carriers is 1.
In a specific implementation, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
Specifically, in the above-described modes 1 and 3, when there are a plurality of time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In fact, when the reference SCS is the SCS of the first DCI or when the reference SCS is the smallest SCS of the multiple carriers, in practical applications, meeting both conditions may result in the presence of multiple time units overlapping the reference time unit.
That is, when the reference SCS is the SCS of the first DCI or when the reference SCS is the smallest SCS of the plurality of carriers, there may be a plurality of time units overlapping with the reference time unit on a certain carrier, and it is determined that the PDSCH is transmitted in each overlapping time unit or it is determined that the PDSCH is transmitted in the first or last time unit.
In a specific implementation, determining the time unit where the PDSCH on the multiple carriers is transmitted according to a time unit offset and the SCS of each of the multiple carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In a specific implementation, the time unit offset is a time unit offset between the first DCI and the scheduled PDSCH.
In a specific implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time internal unit in which the scheduled PDSCH is transmitted.
Specifically, the time unit offset may specifically include: a time unit offset between the first DCI and a scheduled PDSCH; specifically, the time unit interval may be a time unit interval between a time unit in which the first DCI is transmitted and a time internal unit in which the scheduled PDSCH is transmitted.
In a specific implementation, the time unit offset is determined by an indication field in the first DCI, or configured through higher layer signaling.
In a specific implementation, the time cell offset is shared for PDSCH on the multiple carriers.
In an implementation, receiving a scheduled PDSCH in a determined time unit on the plurality of carriers includes:
respectively determining a time domain symbol set transmitted by the PDSCH on each carrier of the plurality of carriers in a determined time unit according to a starting symbol and a transmission length determined by an indication field in the first DCI;
receiving the PDSCH in the determined set of time domain symbols.
Fig. 4 is a schematic flow chart of implementation of a PDSCH transmitting method on a base station side, as shown in the figure, the PDSCH transmitting method may include:
step 401, sending a first DCI, where the first DCI schedules PDSCH transmission on multiple carriers;
step 402, transmitting the scheduled PDSCH in the time units for transmitting the PDSCH on the multiple carriers, wherein the determining terminal determines the time units where the PDSCH on the multiple carriers is transmitted according to the reference SCS or the SCS of each of the multiple carriers.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, transmitting a scheduled PDSCH in a time unit in which the PDSCH is transmitted on the plurality of carriers includes:
and respectively transmitting the PDSCH in a time domain symbol set consisting of a starting symbol indicated by the indication field in the first DCI and a transmission length in a time unit for transmitting the PDSCH on each carrier of the plurality of carriers.
In an implementation, when determining that the terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the reference SCS or the SCS of each of the multiple carriers, the method further includes: and the determining terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the multiple carriers.
In a specific implementation, when the time unit offset is indicated by the indication field in the first DCI, before the transmitting the first DCI, the method further includes:
the method comprises the steps of determining a time unit in which PDSCHs on a plurality of carriers scheduled by first DCI are transmitted on each carrier, and determining a time unit offset indicated in the first DCI based on the time unit and a reference SCS or respective SCSs of the plurality of scheduled carriers.
In a specific implementation, when the time unit offset is pre-configured by higher layer signaling, before transmitting the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, the method further includes:
and determining the time unit where the PDSCH on the plurality of carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the plurality of carriers.
Specifically, when the time cell offset is pre-configured by a higher layer signaling (e.g., RRC (radio resource Control)), before transmitting the scheduled PDSCH in the time cell for transmitting the PDSCH on the multiple carriers, the method further includes:
determining time units where PDSCHs on the multiple carriers are transmitted according to the time unit offset and by referring to SCS or respective SCS of the multiple carriers;
in a specific implementation, determining, by the terminal, the time unit where the PDSCH on the multiple carriers is transmitted according to a time unit offset and with reference to the SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In a specific implementation, when there are multiple time units overlapping with the reference time unit on each of the multiple scheduled carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In a specific implementation, determining, by the terminal, the time unit where the PDSCH transmission on the multiple carriers is located according to a time unit offset and with reference to the SCS includes one of the following ways:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
Specifically, the following can be implemented:
mode 1: when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit (namely, the reference time unit is the time unit on the carrier where the first DCI is transmitted) is determined according to the time unit where the first DCI is transmitted (namely, the DCI corresponds to the time unit determined by the SCS on the transmission carrier) and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier in the scheduled multiple carriers;
the time unit offset is a unit of a length of a time unit determined by the SCS of the first DCI, for example, if the time unit offset is 1, it means that the time unit is 1 time unit determined by the SCS of the first DCI.
Mode 2: when the reference SCS is the largest SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS of the plurality of carriers, according to the time unit (i.e. the time unit determined by the SCS corresponding to the SCS of the DCI on the transmission carrier) where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, the time unit (which may be one or more, if the time unit is more, the time slot determined on each carrier for transmitting the PDSCH is the same) for transmitting the PDSCH in the plurality of carriers is determined (i.e. the PDSCH is determined to be transmitted in the time unit on the carrier corresponding to the largest SCS), and the time unit is taken as the reference time unit (i.e. the time unit on the carrier corresponding to the reference SCS), on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers, determining to transmit a PDSCH in a time unit overlapping the reference time unit;
the time unit offset is a unit of a length of a time unit determined by a largest SCS of the multiple carriers, for example, if the time unit offset is 1, it means that the time unit is 1 determined by the largest SCS of the multiple carriers.
Mode 3: when the reference SCS is the smallest SCS among SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the smallest SCS among SCS of the plurality of carriers, according to the time unit (i.e. the time unit determined by the DCI corresponding to the SCS on the transmission carrier), the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit(s) corresponding to the smallest SCS among the plurality of carriers (may be one or more, if more, the time slot(s) determined on each carrier for transmitting PDSCH are the same) for transmitting PDSCH (i.e. determining to transmit PDSCH in the time unit on the carrier corresponding to the smallest SCS) and taking the time unit as the reference time unit (i.e. the time unit on the carrier corresponding to the reference SCS) on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers, determining to transmit the PDSCH in a time unit overlapping the reference time unit.
The time unit offset is a unit of a length of a time unit determined by the smallest SCS among SCS of the plurality of carriers, for example, if the time unit offset is 1, it means that the time unit determined by the smallest SCS among SCS of the plurality of carriers is 1.
In a specific implementation, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
Specifically, in the above-described modes 1 and 3, when there are a plurality of time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit.
In fact, when the reference SCS is the SCS of the first DCI or when the reference SCS is the smallest SCS of the multiple carriers, in practical applications, meeting both conditions may result in the presence of multiple time units overlapping the reference time unit.
That is, when the reference SCS is the SCS of the first DCI or when the reference SCS is the smallest SCS of the plurality of carriers, there may be a plurality of time units overlapping with the reference time unit on a certain carrier, and it is determined that the PDSCH is transmitted in each overlapping time unit or it is determined that the PDSCH is transmitted in the first or last time unit.
In a specific implementation, determining, by the terminal, the time unit where the PDSCH on the multiple carriers is transmitted according to a time unit offset and the SCS of each of the multiple carriers includes:
mode 4: and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In a specific implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time internal unit in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
In the implementation of time unit, time unit offset for the transmission of PDSCH, the behavior of the base station and the terminal are peer-to-peer.
Specifically, if the time unit offset is signaled through DCI:
in one implementation: the base station determines by itself the time unit in which PDSCH transmission is on each carrier, and the base station may determine by itself in which time unit the first DCI is transmitted. The base station may determine, according to the time unit of the first DCI transmission decided above and the time unit of the scheduled PDSCH transmission, a time unit offset between the first DCI and the scheduled PDSCH, and set a corresponding indication field in the first DCI to a state indicating the time unit offset, thereby indicating, in the first DCI, the time unit offset used for determining the time unit in which the PDSCH is transmitted to the terminal; on the terminal side, because it is not known where the base station is to transmit the first DCI and the scheduled PDSCH, the first DCI needs to be detected in the DCI transmission opportunity, and when the first DCI is detected, the time unit where the PDSCH is transmitted is inferred according to the predefined scheduling timing according to the time unit offset indicated in the first DCI and the time unit where the first DCI is received (that is, the time unit where the PDSCH is transmitted on the multiple carriers is determined according to the time unit offset and referring to the SCS or SCS of each scheduled carrier in the above manner); therefore, the behaviors of the base station and the terminal for determining the time unit of the PDSCH transmission are different, the base station does not need to be determined completely according to the mode of the terminal side, but needs to determine the time unit of the PDSCH transmission according to the mode of the terminal side, and the time unit offset is reversely deduced and notified to the terminal according to the determined time unit of the first DCI transmission and the time unit of the PDSCH transmission.
For example, when the terminal adopts the above mode 1, the behavior of the base station side may be: when the reference SCS is the SCS of the first DCI, the time unit offset is the time unit offset determined based on the SCS of the first DCI, and the base station may find, according to the time unit where the PDSCH is transmitted determined on the scheduled multiple carriers, one time unit defined based on the SCS of the first DCI and overlapping with the time units as the reference time unit, and determine the time unit offset between the first DCI and the reference time unit as the time unit offset to be notified to the terminal, thereby helping the terminal to determine, on each of the scheduled multiple carriers, to transmit the PDSCH in the time unit overlapping with the reference time unit in the above manner 1;
for example, when the terminal adopts the above mode 2, the behavior of the base station side may be: when the reference SCS is the largest SCS among the SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS among the SCS of the plurality of carriers, the base station finds a time unit defined based on the largest SCS (for example, a time unit on the carrier of the largest SCS) overlapping with the time units according to the time unit where the scheduled PDSCH transmission is determined on each carrier, and uses the time unit offset as the reference time unit, and determines the time unit offset between the first DCI and the reference time unit, which is used as the time unit offset to be notified to the terminal, thereby helping the terminal to determine to transmit the PDSCH in the time unit overlapping with the reference time unit on each carrier of the plurality of scheduled carriers in the above manner 2;
for example, when the terminal adopts the above mode 3, the behavior of the base station side may be: when the reference SCS is the smallest SCS among the SCS of the multiple carriers, the time unit offset is the time unit offset determined based on the smallest SCS among the SCS of the multiple carriers, the base station finds a time unit defined based on the smallest SCS (for example, a time unit on the carrier of the smallest SCS) overlapping with the time units according to the time unit where the scheduled PDSCH transmission is determined on each carrier, and uses the time unit offset as the time unit offset to be notified to the terminal, thereby helping the terminal to determine to transmit the PDSCH in the time unit overlapping with the reference time unit on each carrier of the multiple carriers in the above manner 3;
for example, when the terminal adopts the above-mentioned method 4, the behavior of the base station side may be: for each carrier in the multiple carriers, the time unit offset is determined according to the SCS of the current carrier, and a time unit offset common to the multiple carriers is determined on each carrier according to the determined time unit in which the PDSCH is transmitted and the information of the slot spacing, SCS, etc. of the first DCI, and is used as the time unit offset notified to the terminal, so as to help the terminal determine, in the above manner 4, that the PDSCH is transmitted in the time unit overlapping with the reference time unit on each carrier in the multiple scheduled carriers.
In another implementation: the base station determines the time unit offset by itself and determines the time unit at which the first DCI is transmitted by itself, so that after the decision is made, the time unit at which the PDSCH transmission on multiple carriers is determined in the above manner can be directly reused by similar terminal side according to the time unit offset and with reference to the SCS or SCS of each scheduled carrier. The base station may set the corresponding indication field in the first DCI to a state indicating the time unit offset, so as to indicate the time unit offset used for determining the time unit in which the PDSCH is transmitted to the terminal in the first DCI; on the terminal side, because it is not known where the base station is to transmit the first DCI and the scheduled PDSCH, the first DCI needs to be detected in the DCI transmission opportunity, and when the first DCI is detected, the time unit where the PDSCH is transmitted is inferred according to the predefined scheduling timing according to the time unit offset indicated in the first DCI and the time unit where the first DCI is received (that is, the time unit where the PDSCH is transmitted on the multiple carriers is determined according to the time unit offset and referring to the SCS or SCS of each scheduled carrier in the above manner); therefore, the behaviors of the base station and the terminal for determining the time unit of the PDSCH transmission are different, the base station does not need to determine completely according to the mode of the terminal side, the base station can determine the time unit offset by itself and inform the time unit offset to the terminal, and the terminal needs to obtain the time unit offset according to the notice of the base station.
For example, when the terminal adopts the above-mentioned modes 1 to 4, the behavior of the base station side may be: the base station determines the time unit offset by itself, and after the time unit offset is determined, the time unit where the PDSCH on the scheduled carrier is transmitted can be determined according to the transmission time unit of the first DCI determined by the base station itself, completely using the above-mentioned terminal-side mode 1-4, so that the PDSCH is transmitted in the corresponding time unit.
If the time unit offset is a fixed value pre-configured by the higher layer signaling, the base station does not need to determine the time unit offset and carry the time unit offset in the DCI to notify the terminal, the base station and the terminal have known time unit offsets, both the base station and the terminal determine the PDSCH transmission position according to the known time unit offset, but the base station can still adjust the time unit for PDSCH transmission because the first DCI is adjusted to do so, after determining the time unit for the first DCI transmission, the specific base station side can determine the time unit for PDSCH transmission on each carrier according to the time unit for the first DCI transmission and the time unit offset in the same way that the base station determines the time unit offset by itself (and in the way of 1-4 on the same terminal side), and the terminal needs to receive the time unit for the first DCI, and the known time unit offset, the PDSCH transmission time unit on each carrier is found in the manner 1-4 above.
The following is illustrated by way of example.
Assuming that there is one DCI in slot 2K on carrier 1 to schedule PDSCH transmission on carrier 1 and carrier 2, the TDRA indication field in the DCI indicates one start symbol (e.g., the first symbol, or symbol numbered 0), a transmission length (e.g., 8 symbols), and one K0 being 1; the SCS of carrier 1 is 30kHz and the SCS of carrier 2 is 15kH, taking a time unit defined as a time slot as an example, the following can be implemented:
first, mode 1:
with the SCS of the DCI as the reference SCS, it is determined that K0 is in units of slots of 30kHz, i.e., K0 ═ 1 represents the length of one slot on the carrier of 30kH SCS, then:
a base station side:
it is desirable to transmit a DCI in a time slot 2K, schedule the DCI to be transmitted in a time slot 2K +1 on a carrier 1 and a time slot K on a carrier 2, and transmit PDSCH in the time slot 2K +1 on the carrier 1 and the time slot K on the carrier 2, according to a manner similar to that of a terminal determining a time slot in which PDSCH is transmitted (i.e., SCS on the reference carrier 1, a reference time slot corresponding to the time slot in which PDSCH is scheduled to be transmitted on the carrier 1 is the time slot 2K +1 on the carrier 1, and the time slot 2K +1 on the carrier 1 is separated from the time slot in which DCI is transmitted on the carrier 1 by 1), it may be determined that K0 ═ 1 is required to set a TDRA indication field in the DCI to indicate a combination of a first symbol, a transmission length of 8 symbols, and a K0 ═ 1, and the DCI carrying the TDRA indication is transmitted to the terminal in the time slot 2K of the carrier 1, and further according to such time domain resource allocation, the 1 st to 8 symbols, a 1, respectively, And PDSCH is transmitted on symbols 1-8 in slot k of carrier 2.
A terminal side:
determining a reference time slot on a carrier 1 (a carrier on which the DCI is transmitted) is a time slot 2K + K0 or a time slot 2K +1 according to the time slot 2K and K0 on which the DCI is transmitted, determining a time slot on the carrier 1 which overlaps with the reference time slot, that is, a time slot 2K +1 on the carrier 1 (because the carrier 1 is the carrier on which the DCI is transmitted) based on the reference time slot, determining that the scheduled PDSCH on the carrier 1 is transmitted in the time slot 2K +1 on the carrier 1, further determining that the specific time domain position of the scheduled PDSCH on the carrier 2 is the 1 st to 8 th symbols in the time slot 2K +1 on the carrier 1 according to the SLIV (Start and length indicator value) in the TDRA indicated in the DCI, determining a time slot on the carrier 2 which overlaps with the reference time slot, that is the time slot K on the carrier 2, determining that the scheduled PDSCH on the carrier 2 is transmitted in the time slot on the carrier 2, further, according to the SLIV in the TDRA indicated in the DCI, it is determined that the specific time domain position is the 1 st to 8 th symbols in the time slot k on the carrier 2, fig. 5 is a schematic diagram 1 of a DCI scheduling time slot, and specifically, as shown in fig. 5, the terminal receives the PDSCH on the 1 st to 8 th symbols in the time slot 2k +1 of the carrier 1 and the 1 st to 8 th symbols in the time slot k of the carrier 2, respectively.
Second, mode 2:
with the largest SCS of carrier 1 and carrier 2 as the reference SCS (SCS of carrier 1), it is determined that K0 is in units of time slots of 30kHz, i.e., K0 ═ 1 represents the length of one time slot on the carrier of 30kH SCS, then:
a base station side:
it is desirable to transmit a DCI in a time slot 2K, schedule the DCI to be transmitted in a time slot 2K +1 on a carrier 1 and a time slot K on a carrier 2 to transmit a PDSCH, determine a time slot in which the PDSCH is transmitted according to a similar terminal (i.e., SCS on the reference carrier 1, then the reference time slot corresponding to the time slot in which the PDSCH is scheduled to be transmitted on the carrier 2 is the time slot 2K +1 on the carrier 1, and the time slot 2K +1 on the carrier 1 is separated from the time slot in which the DCI is transmitted on the carrier 1 by 1 time slot), and may determine that it is necessary to indicate that K0 is 1, thereby setting a TDRA indication field in the DCI to indicate a combination of a first symbol, a transmission length of 8 symbols, and K0 being 1, transmitting the DCI carrying the TDRA indication to the terminal in the time slot 2K of the carrier 1, and further allocating time domain resources according to the combination of the 1-8 symbols, a PDSCH in the time slot 2K +1 of the carrier 1, And PDSCH is transmitted on symbols 1-8 in slot k of carrier 2.
A terminal side:
determining that the SCS of the carrier 1 in the scheduled carriers is maximum, and then taking the scheduled carrier 1 as a reference, according to the time slots 2K and K0 where the DCI is transmitted and the SCS (mu) of the DCIPDCCH1) and SCS (μ) of scheduled PDSCH on carrier 1PDSCH1) according to the formulaDetermining a time slot in which a scheduled PDSCH transmission on Carrier 1 is located as a time slot on Carrier 1In fact, since the DCI is on carrier 1, the DCI is the same as the SCS of the scheduled PDSCH on carrier 1, then the formula is shownTherefore, the time slot position can also be determined directly according to the time slot 2K and K1 where the DCI is located, and further according to the SLIV in the TDRA indicated in the DCI, the specific time domain position is determined to be the 1 st to 8 th symbols in the time slot 2K +1 on the carrier 1, the time slot 2K +1 where the scheduled PDSCH transmission on the carrier 1 is located is used as a reference time slot, and the time slot overlapping with the reference time slot on the carrier (i.e., the carrier 2) of the other scheduled carrier not corresponding to the largest SCS, that is, the time slot on the carrier 2 is determinedk, it is determined that the scheduled PDSCH on carrier 2 is transmitted in time slot k on carrier 2, and further, according to the SLIV in the TDRA indicated in the DCI, it is determined that the specific time domain position is the 1 st to 8 th symbols in time slot k on carrier 2, fig. 5 is schematic view 1 of the DCI scheduling time slot, and specifically, as shown in fig. 5, the terminal receives the PDSCH on the 1 st to 8 th symbols in time slot 2k +1 of carrier 1 and the 1 st to 8 th symbols in time slot k of carrier 2, respectively.
Third, mode 3:
with the smallest SCS of carrier 1 and carrier 2 as the reference SCS (SCS of carrier 2), it is determined that K0 is in units of time slots of 15kHz, i.e., K0 ═ 1 indicates the length of one time slot on the carrier of 15kH SCS, then:
1. the first mode is as follows:
when a plurality of time slots on other carriers which are overlapped with the reference time slot determined according to the reference SCS are predetermined in advance, determining that the PDSCH is transmitted in the overlapped last time slot, and then:
a base station side:
if it is desired to transmit a DCI in time slot 2k to schedule PDSCH transmission in time slot 2k +3 on carrier 1 and time slot k +1 on carrier 2, the method for determining the time slot in which PDSCH transmission is located according to similar terminals (i.e. according to DCI (μ) on carrier 1PDCCHScheduling PDSCH (μ) on carrier 2 as 1PDSCH0) scheduling timing designIt may be determined that when K0 ═ 1 is satisfied that DCI on carrier 1 can schedule PDSCH in time slot K +1 on carrier 2, and time slot K +1 on carrier 2 is used as a reference time slot, time slot 2K +3 on carrier 1 is the last time slot overlapping with it, and thus PDSCH on carrier 2 is transmitted in time slot 2K + 3), it may be determined that it is necessary to indicate K0 ═ 1, thereby setting a combination of a TDRA indication field in DCI indicating that one start symbol is the first symbol, a transmission length is 8 symbols, and K0 ═ 1, transmit DCI carrying this TDRA indication to a terminal in time slot 2K of carrier 1, and further according to such time domain resource allocation, 1-8 th symbols in time slot 2K +3 of carrier 1, and 1 st symbol in time slot K +1 of carrier 2, respectively, and further according to such time domain resource allocationThe PDSCH is transmitted on 1-8 symbols.
A terminal side:
determining that the SCS of the carrier 2 in the scheduled carriers is minimum, and then taking the scheduled carrier 2 as a reference, according to the time slots 2K and K0 where the DCI is transmitted and the SCS (mu) of the DCIPDCCH1) and SCS (μ) of scheduled PDSCH on carrier 2PDSCH0), according to the formulaDetermining a time slot in which a scheduled PDSCH transmission on Carrier 2 is located as a time slot on Carrier 2Further according to the SLIV in TDRA indicated in DCI, determining that the specific time domain position is the 1 st to 8 th symbols in the time slot k +1 on the carrier 2, taking the time slot k +1 where the scheduled PDSCH transmission on the carrier 2 is located as a reference time slot, determining the last time slot which is overlapped with the reference time slot on the carrier (namely the carrier 1) which does not correspond to the minimum SCS in the scheduled carriers, namely the time slot 2k +3 on the carrier 1, then it is determined that the scheduled PDSCH on carrier 1 is transmitted in time slot 2k +3 on carrier 1, and further, according to the SLIV in the TDRA indicated in the DCI, it is determined that its specific time domain position is the 1 st to 8 th symbols in time slot 2k +3 on carrier 1, fig. 6 is a schematic diagram of a DCI scheduling slot 2, and specifically as shown in fig. 6, a terminal receives PDSCH on 1 st to 8 th symbols in a slot 2k +3 of a carrier 1 and 1 st to 8 th symbols in a slot k +1 of a carrier 2, respectively.
2. The second mode is as follows:
when a plurality of time slots on other carriers overlapping with the reference time slot determined according to the reference SCS are predetermined in advance, it is determined that the PDSCH is transmitted in the overlapping first time slot, the specific process is similar to the first manner described above and is not described again, but the difference between the first time slot determined on the carrier 1 and overlapping with the reference time slot k +1 on the carrier 2 is the time slot 2k +2, that is, the scheduled PDSCH on the carrier 1 is transmitted in the time slot 2k +2, fig. 7 is a DCI scheduling time slot schematic diagram 3, which is specifically shown in fig. 7.
3. The third mode is as follows:
when a plurality of time slots on other carriers overlapping the reference time slot determined according to the reference SCS are predetermined in advance, it is determined that the PDSCH is transmitted in each overlapping time slot, and the specific process is similar to the first method described above and is not described again, but the difference between the two time slots is that the time slots overlapping the reference time slot k +1 on the carrier 2 determined on the carrier 1 are time slots 2k +2 and 2k +3, that is, there are two PDSCHs scheduled on the carrier 1 and are transmitted in the time slots 2k +2 and 2k +3, respectively, fig. 8 is a DCI scheduling time slot schematic diagram 4, which is specifically shown in fig. 8.
Fourth, mode 4:
for the carrier 1 and the carrier 2, respectively, determining the time slots where the PDSCH transmission on the carrier 1 and the carrier 2 is according to the scheduling time sequence design of the existing PDCCH scheduling PDSCH according to the respective SCS, then:
a base station side:
it is desirable to send a DCI in slot 2k to schedule the PDSCH transmission in slot 2k +1 on carrier 1 and slot k +1 on carrier 2, depending on the scheduling timing design (i.e., design of the scheduling timingAccording to μ on each carrierPDSCHAnd muPDCCHWhen K0 is determined to be 1, it may be implemented to schedule a slot 2K +1 on carrier 1 and a slot K +1 on carrier 2), it may be determined that a needed indication K0 is 1, so as to set a combination of a TDRA indication field in DCI indicating that one start symbol is a first symbol, a transmission length is 8 symbols, and K0 is 1, and transmit DCI carrying this TDRA indication to a terminal in slot 2K of carrier 1, and further transmit PDSCH on the 1 st to 8 th symbols in slot 2K +1 of carrier 1 and the 1 st to 8 th symbols in slot K +1 of carrier 2, respectively, according to such time domain resource allocation.
A terminal side:
according to the time slot 2K and K0 where the DCI transmission is located and the SCS (mu) of the DCIPDCCH1) and SCS (μ) of scheduled PDSCH on carrier 1PDSCH1) according to the formulaDetermining scheduled on Carrier 1The time slot of the PDSCH transmission is the time slot on the carrier 1In fact, since the DCI is on carrier 1, the DCI is the same as the SCS of the scheduled PDSCH on carrier 1, then the formula is shownTherefore, the specific time domain position of the DCI can be determined according to the time slot 2K and K1 where the DCI is located, and further according to the SLIV in the TDRA indicated in the DCI, the specific time domain position is the 1 st to 8 th symbols in the time slot 2K +1 on the carrier 1; according to the time slot 2K and K0 where the DCI transmission is located and the SCS (mu) of the DCIPDCCH1) and SCS (μ) of scheduled PDSCH on carrier 2PDSCH0), according to the formulaDetermining a time slot in which a scheduled PDSCH transmission on Carrier 2 is located as a time slot on Carrier 2Further, according to the SLIV in the TDRA indicated in the DCI, it is determined that the specific time domain position is the 1 st to 8 th symbols in the time slot k +1 on the carrier 2, where fig. 9 is a schematic diagram 5 of a DCI scheduling time slot, and is specifically shown in fig. 9; the terminal receives PDSCH on symbols 1-8 in slot 2k +1 of carrier 1 and symbols 1-8 in slot k +1 of carrier 2, respectively.
It should be noted that, in the above embodiments, only the slot-based K0 is taken as an example, and the above scheme is also applicable to the sub-slot-based or other time unit-based K0;
in the above embodiments, SCS of the carrier 1 and the carrier 2 is only an example, and may also be other SCS combinations;
the DCI on carrier 1 schedules PDSCH on carrier 1 and carrier 2 simultaneously is also an example, and may also be DCI on one carrier schedules more carriers;
the scheduled carrier may or may not contain the carrier on which the DCI transmission is located (i.e., if carrier 1 transmits DCI, the DCI scheduled carrier may or may not contain carrier 1);
in the multiple scheduled carriers, there may be 2 or more carriers with the same SCS, for example, DCI schedules 4 carriers, where 2 carriers correspond to 30kHz SCS, and 2 carriers correspond to 15kHz SCS, and if the reference SCS is the maximum SCS according to the above-mentioned method, two carriers have the reference SCS, then in the above-mentioned method 2, the transmission time slots of the scheduled PDSCH on the two carriers may be directly determined first, and the time slots are used as a reference to determine the time slots for transmitting the PDSCH on the other two 15 kHz; it is also possible that 1 carrier corresponds to 60kHz SCS, two carriers correspond to 30kHz SCS, one carrier corresponds to 15kHz SCS, etc., in various combinations of the above, the scheme in the embodiments is equally applicable; the above-described method is applicable to both FDD (Frequency Division Duplex) and TDD (Time Division Duplex).
It should be noted that, in the embodiment of the present invention, one DCI is used to schedule multiple carriers as a description mode, where the DCI may be replaced by a PDCCH, the DCI is the carrying content of the PDCCH, and different DCI formats correspond to different scheduling requirements and scenarios, so in transmission, the DCI and the PDCCH may be equivalent, that is, sending one DCI is equivalent to sending one PDCCH (the PDCCH uses the DCI format for transmission), receiving one DCI is equivalent to receiving one PDCCH (the PDCCH uses the DCI format for transmission), and performing a correlation operation according to the DCI is equivalent to performing a correlation operation according to the PDCCH; when BWPs (BandWidth parts) are divided on one carrier, PDSCH transmission on one carrier specifically refers to PDSCH transmission on a certain BWP on the carrier, and the BWP is an active BWP, so that multiple carriers can be replaced by multiple BWPs.
In an embodiment, when the SCS of the DCI and the SCS of the carrier on which the scheduled PDSCH is located are different, the formulaFor example only (where Ks is the determined slot number for transmitting PDSCH), this is generally applied to the case where there is no slot offset between different carriers (i.e. the timing of different carriers is synchronous and aligned), and when there is a slot offset between different carriers (i.e. the definitions of different carriers are not synchronous and aligned, e.g. the starting position of the slot on carrier 1 does not exist with the starting position of the slot on carrier 2, and there may be an offset of X symbols), then the formula may be usedThe determined number of the time slot for transmitting the PDSCH is substituted for the formula in the above embodiment, and the scheme in the embodiment of the present invention may also be adopted.
Based on the same inventive concept, the embodiment of the present invention further provides a base station side device, a user equipment, a PDSCH receiving apparatus, a PDSCH transmitting apparatus, and a computer readable storage medium, and because the principles of these devices for solving the problems are similar to the PDSCH receiving method and the PDSCH transmitting method, the implementation of these devices may refer to the implementation of the methods, and the repeated parts are not described again.
Fig. 10 is a schematic structural diagram of a terminal, as shown, including:
the processor 1000, which is used to read the program in the memory 1020, executes the following processes:
receiving first DCI, the first DCI scheduling PDSCH transmission on a plurality of carriers;
determining time units where PDSCHs on the multiple carriers are transmitted according to a reference SCS or respective SCSs of the multiple carriers;
receiving a scheduled PDSCH in a determined time unit on the plurality of carriers;
a transceiver 1010 for receiving and transmitting data under the control of the processor 1000.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, receiving a scheduled PDSCH in a determined time unit on the plurality of carriers includes:
respectively determining a time domain symbol set transmitted by the PDSCH on each carrier of the plurality of carriers in a determined time unit according to a starting symbol and a transmission length determined by an indication field in the first DCI;
receiving the PDSCH in the determined set of time domain symbols.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when the determining, according to the reference SCS or the SCS of each of the plurality of carriers, the time unit where the PDSCH transmission on the plurality of carriers is located, further includes: determining a time unit in which the PDSCH on the plurality of carriers is transmitted according to a time unit offset and with reference to SCS or SCS of each of the plurality of carriers.
In an implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to a time unit offset and with reference to SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In an implementation, when there are multiple time units overlapping the reference time unit on each of the scheduled multiple carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In implementation, determining the time unit where the PDSCH transmission on the multiple carriers is located according to one time unit offset and with reference to the SCS includes one of the following ways:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
In practice, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
In an implementation, determining a time unit where PDSCH transmission on the plurality of carriers is located according to a time unit offset and SCS of each of the plurality of carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In an implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1030 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.
The embodiment of the invention provides a PDSCH receiving device, which comprises:
a first receiving module, configured to receive a first DCI, where the first DCI schedules PDSCH transmission on multiple carriers;
a determining module, configured to determine, according to a reference SCS or an SCS of each of the multiple carriers, a time unit in which PDSCH on the multiple carriers is transmitted;
a second receiving module for receiving the scheduled PDSCH in the determined time unit on the plurality of carriers.
Specific implementation may refer to implementation of the terminal-side PDSCH receiving method.
For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.
When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.
Fig. 11 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:
the processor 1100, which reads the program in the memory 1120, performs the following processes:
transmitting a first DCI, the first DCI scheduling a plurality of carriers for PDSCH transmission;
transmitting the scheduled PDSCH in the time units for transmitting the PDSCH on the plurality of carriers, wherein the time units for transmitting the PDSCH on the plurality of carriers are determined by the determining terminal according to the reference SCS or the respective SCS of the plurality of carriers;
a transceiver 1110 for receiving and transmitting data under the control of the processor 1100.
In an implementation, the reference SCS is one of the following SCS:
the DCI transmits a corresponding SCS, a maximum value of SCS of the scheduled plurality of carriers, a minimum value of SCS of the scheduled plurality of carriers.
In an implementation, transmitting a scheduled PDSCH in a time unit in which the PDSCH is transmitted on the plurality of carriers includes:
and respectively transmitting the PDSCH in a time domain symbol set consisting of a starting symbol indicated by the indication field in the first DCI and a transmission length in a time unit for transmitting the PDSCH on each carrier of the plurality of carriers.
In an implementation, when the time unit offset is indicated by an indication field in the first DCI, before transmitting the first DCI, the method further includes:
the method comprises the steps of determining a time unit in which PDSCHs on a plurality of carriers scheduled by first DCI are transmitted on each carrier, and determining a time unit offset indicated in the first DCI based on the time unit and a reference SCS or respective SCSs of the plurality of scheduled carriers.
In an implementation, when the time unit offset is pre-configured by higher layer signaling, before transmitting the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, the method further includes:
and determining the time unit where the PDSCH on the plurality of carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the plurality of carriers.
In an implementation, the time unit is: the method comprises a predefined time period, or subframe, or time slot, or sub-slot formed by A symbols, wherein A is a positive integer.
In an implementation, when determining that the terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the reference SCS or the SCS of each of the multiple carriers, the method further includes: and the determining terminal determines the time unit where the PDSCH on the multiple carriers is transmitted according to the time unit offset and by referring to the SCS or the respective SCS of the multiple carriers.
In implementation, determining the time unit in which the PDSCH transmission on the multiple carriers is located by the terminal according to a time unit offset and with reference to the SCS includes:
the time unit offset is determined based on the reference SCS, a reference time unit based on the reference SCS is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is transmitted in the time unit overlapped with the reference time unit on each carrier wave in the plurality of scheduled carrier waves.
In an implementation, when there are multiple time units overlapping the reference time unit on each of the scheduled multiple carriers, it is determined that the PDSCH is transmitted in each of the overlapping time units, or it is determined that the PDSCH is transmitted in the first or last time unit thereof.
In implementation, the determining, by the terminal, the time unit in which the PDSCH transmission on the multiple carriers is located according to one time unit offset and with reference to the SCS includes one of the following manners:
when the reference SCS is the SCS of the first DCI, the time unit offset is determined based on the SCS of the first DCI, a reference time unit is determined according to the time unit where the first DCI is transmitted and the time unit offset, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier wave in the scheduled multiple carrier waves; or the like, or, alternatively,
when the reference SCS is the largest SCS in SCS of the plurality of carriers, the time unit offset is the time unit offset determined based on the largest SCS in SCS of the plurality of carriers, the time unit for transmitting PDSCH on the carrier corresponding to the largest SCS in the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the largest SCS and the time unit offset, and the time unit is used as the reference time unit, and the PDSCH is determined to be transmitted in the time unit overlapped with the reference time unit on each carrier except the carrier corresponding to the largest SCS in the plurality of scheduled carriers; or the like, or, alternatively,
and when the reference SCS is the smallest SCS among the SCSs of the plurality of carriers, the time unit offset is determined based on the smallest SCS among the SCSs of the plurality of carriers, a time unit for transmitting the PDSCH on the carrier corresponding to the smallest SCS among the plurality of carriers is determined according to the time unit where the first DCI is transmitted, the SCS of the first DCI, the smallest SCS and the time unit offset, the time unit is used as a reference time unit, and the PDSCH transmission in a time unit overlapped with the reference time unit is determined on each carrier except the carrier corresponding to the smallest SCS among the plurality of scheduled carriers.
In practice, if there are multiple time units overlapping with the reference time unit, it is determined that the PDSCH is transmitted in each overlapping time unit, or it is determined that the PDSCH is transmitted in the first or last time unit.
In implementation, determining, by the terminal, the time unit in which the PDSCH on the multiple carriers is transmitted according to a time unit offset and the SCS of each of the multiple carriers includes:
and for each carrier in the plurality of carriers, the time unit offset is determined according to the SCS of the current carrier, and the time unit for transmitting the PDSCH on the current carrier is determined according to the time unit in which the first DCI is transmitted, the SCS of the first DCI, the SCS of the current carrier and the time unit offset.
In an implementation, the time unit offset is a time unit offset between the first DCI and a scheduled PDSCH.
In an implementation, the time unit offset is a time unit interval between a time unit in which the first DCI is transmitted and a time intra-cell in which the scheduled PDSCH is transmitted.
In an implementation, the time unit offset is determined by an indication field in the first DCI or configured through higher layer signaling.
In an implementation, the time unit offset is shared for PDSCH on the multiple carriers.
Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.
The embodiment of the invention provides a PDSCH transmitting device, which comprises:
a first sending module, configured to send a first DCI, where the first DCI schedules a plurality of carriers for PDSCH transmission;
and a second sending module, configured to send the scheduled PDSCH in the time unit for transmitting the PDSCH on the multiple carriers, where the determining terminal determines the time unit in which the PDSCH on the multiple carriers is transmitted according to a reference SCS or respective SCS of the multiple carriers.
Specific implementation may refer to implementation of the PDSCH transmitting method on the base station side.
For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.
An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program for executing the above-described PDSCH receiving method and/or PDSCH transmitting method.
The specific implementation may refer to implementation of the terminal-side PDSCH receiving method and/or the base station-side PDSCH transmitting method.
In summary, in the technical solution provided in the embodiments of the present invention, the time unit where PDSCH transmission on multiple carriers scheduled by the first DCI is located is determined according to the reference SCS or the respective SCS of each scheduled carrier.
Specifically, the terminal and the base station determine the scheduling timing design when the PDSCH on the multiple carriers is transmitted according to the DCI, so that the time unit in which the PDSCH on each carrier is transmitted can be determined, and the scheduled PDSCH can be transmitted and received.
The embodiment of the invention provides a scheduling time sequence design when one DCI schedules the PDSCH transmission on a plurality of carriers, thereby ensuring that a terminal and a base station understand consistently to determine the time unit of the PDSCH transmission on each carrier and ensuring the normal transmission when one DCI schedules the PDSCH transmission on a plurality of carriers.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
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