Transmitting apparatus and receiving apparatus for wireless communication
阅读说明:本技术 用于无线通信的发送装置和接收装置 (Transmitting apparatus and receiving apparatus for wireless communication ) 是由 栗忠峰 李奕霖 罗健 理查德·斯特林-加拉赫 于 2018-09-25 设计创作,主要内容包括:本发明提出了一种用于无线通信(特别是用于V2X或CITS通信)的发送装置和接收装置。上述发送装置用于确定用于发送包的多于一个传输,并使用确定的传输向接收装置或一组接收装置发送包。上述接收装置用于在多于一个传输中从发送装置接收包,并组合上述传输以获得包。本发明还涉及相应的发送方法和接收方法。(The invention provides a transmitting device and a receiving device for wireless communication (especially for V2X or CITS communication). The transmitting device is configured to determine more than one transmission for transmitting the packet and to transmit the packet to the receiving device or a group of receiving devices using the determined transmissions. The receiving device is configured to receive packets from the sending device in more than one transmission and combine the transmissions to obtain packets. The invention also relates to a corresponding transmitting method and receiving method.)
1. A transmitting apparatus (100) for wireless communication, the transmitting apparatus (100) being for
Determining more than one transmission (101) for sending a packet (102);
-sending said packet (102) to a receiving device (200) and/or a group of receiving devices (200) using said determined transmission (101).
2. The transmitting apparatus (100) of claim 1, wherein each transmission (101) is allocated a set of resources, and
the set of resources includes at least one time resource, frequency resource, code resource, and/or spatial resource.
3. The transmitting apparatus (100) of claim 1 or 2, further being configured to
Determining a number of transmissions (101), in particular depending on whether the packet (102) was initially sent or retransmitted to the receiving device (200) and/or the group of receiving devices (200).
4. The transmitting apparatus (100) according to one of claims 1 to 3, wherein
The packets (102) are transport blocks and/or code blocks, in particular transport blocks from a Medium Access Control (MAC) layer.
5. Transmitting device (100) according to one of claims 1 to 4, wherein
Each determined transmission (102) is associated with an antenna port,
wherein the antenna ports have quasi co-location (QCL) assumptions determined with respect to the reference antenna port, and/or each determined transmission serves as a reference antenna port.
6. Transmitting device (100) according to one of claims 1 to 5, further being adapted to
Signaling information to the receiving device (200) and/or the group of receiving devices (200),
wherein the information comprises at least one of:
-QCL assumptions and/or spatial relationships,
-a number of transmissions (101),
-a period of said transmission (101).
7. The transmitting apparatus (100) of claim 5 or 6, further being configured to
Signaling information to the receiving device (200) and/or the group of receiving devices (200),
wherein the information comprises at least one of:
-an indication of whether QCL assumptions and/or spatial relationships are enabled,
-the QCL assumes an indication of whether the antenna ports associated with different determined transmissions (101) are all the same,
-determined at least one QCL hypothesis, QCL parameter, and/or QCL type for the transmission (101).
8. Transmitting device (100) according to one of claims 1 to 7, further being adapted to
Signaling information to the receiving device (200) and/or the group of receiving devices (200),
wherein the information comprises at least one of:
-a set of resources for more than one transmission,
-a set of resources for control channels for more than one transmission.
9. The transmitting apparatus (100) of one of claims 1 to 8, further being configured to
Signaling information to the receiving device (200) and/or the group of receiving devices (200),
wherein the information comprises at least one of:
-a determined ID or index range of the transmission (101);
-an ID of the receiving device (200) and/or the group of receiving devices (200).
10. The transmitting apparatus (100) of one of claims 1 to 9, further being configured to
Signaling information to the receiving device (200) and/or the group of receiving devices (200),
wherein the information comprises at least one of:
-an indication of whether a hybrid automatic repeat request (HARQ) process is enabled for the determined transmission (101);
-the determined number of HARQ processes and/or the maximum number of HARQ processes for the transmission (101).
11. The transmitting apparatus (100) of one of claims 1 to 10, further being configured to
Receiving feedback information, in particular HARQ feedback information comprising NACK and/or ACK, from the receiving apparatus (200) and/or the group of receiving apparatuses (200) respectively in the determined resources, and
determining a retransmission of the packet (102) and/or a number of transmissions to retransmit the packet (102) based on the feedback information.
12. The transmitting apparatus (100) of claim 11, further configured to
Sharing the feedback information and/or feedback resources with at least one other transmitting apparatus.
13. A receiving apparatus (200) for wireless communication, the receiving apparatus (200) being for
Receiving packets (102) in more than one transmission (101) from a transmitting device (100), an
Combining the transmissions (101) and/or decoding at least one transmission to obtain the packet (102).
14. The receiving apparatus (200) of claim 13, wherein each transmission (101) is allocated a set of resources, and
the resource set includes at least one time resource, frequency resource code resource, and/or spatial resource.
15. The receiving device (200) according to claim 13 or 14, further being for
Transmitting feedback information (900), in particular feedback information comprising ACK and/or NACK, of the packet (102) to the transmitting device (100) or to another receiving device in the determined resources.
16. The receiving device (200) of claim 15, wherein
The feedback information includes ACK and NACK, and wherein the ACK and NACK are allocated to different resources.
17. The receiving device (200) according to claim 15 or 16, wherein
The feedback information (900) further comprises at least one of:
-an ID of the receiving device (200) or an ID of a group of receiving devices (200) to which the receiving device (200) belongs,
-QCL reference information.
18. Receiving device (200) according to one of claims 15 to 17, further being adapted to
The feedback information is sent in more than one transmission (901).
19. Receiving device (200) according to one of claims 15 to 18, for
Transmitting the feedback information (900) to the transmitting device (100) on a shared channel and/or resource with other receiving devices (200).
20. Receiving device (200) according to one of claims 15 to 19, further being adapted to
Receiving feedback information (900) from at least one other receiving apparatus (200), an
Aggregating and/or concatenating the feedback information (900) received from the first further receiving device (200) with own feedback information (900) and/or feedback information (900) received from the second further receiving device (200),
and transmitting the aggregated and/or connected feedback information (900) to the transmitting device (100) or other receiving devices (200).
21. Receiving device (200) according to one of claims 15 to 20, for
Receiving feedback information (900) comprising a NACK or ACK and/or a respective index from at least one other receiving device (200), and
aggregating and/or concatenating the NACKs or ACKs and/or the corresponding indices and transmitting the aggregated and/or concatenated feedback information (900) to the transmitting device (100) or other receiving devices (200).
22. Receiving device (200) according to claim 20 or 21, for
Receiving signaling indicating whether to send the aggregated and/or connected feedback information (900) to the sending device (100) or other receiving devices (200).
23. Receiving device (200) according to one of claims 15 to 22, for
Transmitting the feedback information according to a reference timing (900),
wherein the reference timing comprises at least one of:
-predefined time resources, first time resources allocated to said more than one transmission (901), time resources whose transmission channels and/or signals are quasi co-located with channels and/or signals identified during and/or after initial access, and/or time resources allocated to a last received transmission of said more than one transmission (901).
24. Receiving device (200) according to one of claims 15 to 23, wherein
The feedback information (900) comprises ACK or NACK, or ACK and NACK, an
The determined resources are common preamble sequences, and/or common Physical Uplink Control Channel (PUCCH) resources, and/or common Physical Uplink Shared Channel (PUSCH) resources for the receiving apparatus (200) and at least one other receiving apparatus (200).
25. The receiving apparatus (200) of claim 24, wherein the receiving apparatus (200) is configured to, when the feedback information (900) comprises ACK and NACK, transmit the ACK and NACK
The feedback information is transmitted in different common preamble sequences, and/or different common PUCCH resources, and/or different common PUSCH resources (900).
26. A transmission method (1100), in particular for wireless communication, the transmission method (1100) comprising
Determining (1101) more than one transmission (101) for sending the packet (102), and
sending (1102) the packet (102) using the determined transmission (101).
27. Receiving method (1200), in particular for wireless communication, the receiving method (1200) comprising
Receiving (1201) packets in more than one transmission (101), and
combining (1202) the transmissions (101) to obtain the packet (102).
Technical Field
The present invention relates to the field of wireless communications, and more particularly to V2X (i.e., vehicle-to-vehicle (V2V), vehicle-to-infrastructure, and/or vehicle-to-pedestrian) communications, or cellular intelligent transportation systems (C-TSI) communications. The invention proposes in particular a transmitting device for such a wireless communication, a receiving device for such a wireless communication, and corresponding transmitting and receiving methods.
Background
There is a need for a capable wireless communication system, particularly a V2X or C-ITS communication system, to support, for example, the ever-increasing demand for vehicle safety, traffic management, and different levels of automated driving assistance. However, to achieve this goal, several challenges still need to be addressed, in particular:
1. there is a need to ensure more adequate coverage and reliability of V2X communications, and in particular better communication quality.
2. There is a need to enable more efficient multicast transmissions to support, for example, high definition map downloads, software downloads, traffic information, real-time location, etc.
Conventional V2X in Long Term Evolution (LTE) has not adequately addressed these challenges. Although conventional V2X provides up to two transmissions of a packet, including one blind retransmission, to provide coverage or reliability enhancement, it still has the following disadvantages:
1. its flexibility and coverage/reliability are still insufficient.
2. Especially, since beamforming is not considered, the communication quality is not good enough.
3. No feedback mechanism is provided, only blind retransmissions. In particular, legacy LTE V2X (see, e.g., TS 36.321) provides for multicast transmissions, but does not support flexible hybrid automatic repeat request (HARQ) retransmissions for such multicast transmissions. Furthermore, a very conservative Modulation and Coding Scheme (MCS) is typically used. Therefore, the efficiency is still too low.
One approach for improving the conventional V2X uses a shared channel to provide multicast feedback. However, this scheme does not take into account either the beamforming effect or the effect on the increased inter-cell interference.
Another scheme for improving the conventional V2X provides for simultaneous NACK transmission from more than one receiving node. However, this scheme does not take into account the beamforming effect, nor the effect on increased inter-cell interference.
Another solution for improving the conventional V2X provides multicast transmission in local clusters. However, this scheme does not consider the operation of a gnodeb (gnb) or Base Station (BS) or RSU or UE multicasting to a destination device using beamforming transmission, and also does not consider relaying beam information and HARQ-ACK or NACK.
Disclosure of Invention
In view of the above challenges and deficiencies, the present invention is directed to improving conventional wireless communications, particularly conventional V2X and/or C-ITS. It is an object of the present invention to improve these communications, in particular in terms of flexibility, coverage/reliability, and efficiency. Furthermore, the present invention contemplates beamforming. In addition, the present invention provides a feedback mechanism. To this end, the present invention provides a transmitting apparatus and a receiving apparatus for wireless communication, respectively, which achieve these improvements.
The object of the invention is achieved by the solution provided in the appended independent claims. Advantageous realization forms of the invention are further defined in the dependent claims.
In particular, the invention proposes a plurality of transmissions (transmission bindings) of a packet to be transmitted from a transmitting device to a receiving device or a group of receiving devices. In particular, the above-mentioned multiple transmissions may have more than one QCL hypothesis, and may be unicast transmission, multicast transmission, broadcast transmission, or multicast transmission in the present invention.
A first aspect of the present invention provides a transmitting apparatus for wireless communication, the transmitting apparatus for determining more than one transmission for transmitting a packet; the packet is sent to a receiving device and/or a group of receiving devices using the determined transmission.
The transmitting means described above may be configured for V2X or C-ITS communication in particular. For example, the transmitting apparatus may be (or may be implemented in) a BS or C-ITS communication system, and may be used to communicate with a plurality of User Equipments (UEs) and/or vehicles.
Since according to the transmitting apparatus of the first aspect, a plurality of transmissions are determined in advance and then used to transmit the same packet to a receiving apparatus or a group of receiving apparatuses, the coverage and reliability of the transmitted packet are significantly improved. For example, the apparatus of the first aspect may transmit the plurality of transmissions as different beams. Accordingly, beamforming is supported to improve communication quality. Coverage and flexibility are further improved by predetermining a number of transmissions before sending a packet.
In one implementation form of the first aspect, each transmission is allocated a set of resources, and the set of resources includes at least one time resource, frequency resource, code resource, and/or spatial resource.
A resource set may include one or more resources. In particular, each transmission is assigned a different set of resources. For example, each transmission is allocated to a different spatial resource, in particular, to a different beam.
For example, each transmission may be sent in a different time slot. In particular, in the case of beamforming, each transmission may be a transmission beam sent in a different beam slot (beam slot). The set of resources (e.g., beam slots) used to transmit the same packet may be referred to as bundled resources, e.g., bundled beam slots. The advantage is improved redundancy and block error rate (BLER).
In another implementation form of the first method, the sending device is further configured to determine the number of transmissions, in particular according to whether the above-mentioned packet was initially sent or retransmitted to the receiving device and/or a group of receiving devices.
This flexible bundling of transmissions reduces overhead and may also improve multiplexing gain since other (non-bundled or other bundled) transmissions may be used to send different packets.
In another implementation form of the first aspect, the packet is a transport block and/or a code block, in particular a transport block from a Medium Access Control (MAC) layer.
In another implementation form of the first aspect, each determined transmission is associated with an antenna port, wherein the antenna port has a determined quasi co-location (QCL) hypothesis relative to a reference antenna port, and/or each determined transmission is used as a reference antenna port.
Thus, from the perspective of the receiving device, each transmission may be represented by a different QCL hypothesis. The antenna port may alternatively be used as a reference antenna port. This may be used, for example, for a dedicated PHY channel, such as a Physical Broadcast Channel (PBCH).
In another implementation form of the first aspect, the sending apparatus is further configured to signal information to the receiving apparatus and/or a group of receiving apparatuses, where the information includes at least one of: QCL assumptions and/or spatial relationships, number of transmissions, periodicity of transmissions.
QCL assumptions can be defined as: two antenna ports may be considered quasi co-located if the large scale characteristics of the channel through which a symbol on one antenna port is transmitted can be derived from the channel through which a symbol on the other antenna port is transmitted. The large scale features may include one or more of the following: delay spread, doppler shift, average gain, average delay, and spatial Rx parameters.
A spatial relationship may be defined between the two antenna ports. Typically, a spatial relationship is used between one Tx antenna port and a reference antenna port. This spatial relationship may indicate that the transmitting apparatus assumes that the Tx beam is the same as the Tx beam or the Tx beam is the same as the Rx beam between the two antenna ports.
In another implementation form of the first aspect, the sending apparatus is further configured to signal information to the receiving apparatus and/or a group of receiving apparatuses, where the information includes at least one of: an indication of whether QCL assumptions or spatial relationships are enabled, an indication of whether QCL assumptions are the same for antenna ports associated with different determined transmissions, at least one QCL assumption for a determined transmission, QCL parameters, and/or QCL type.
The transmitting device may use the above information (e.g., QCL assumptions and/or spatial relationships) to configure its transmission. In this way, coverage and efficiency are further improved.
In another implementation form of the first aspect, the sending apparatus is further configured to signal information to the receiving apparatus and/or a group of receiving apparatuses, where the information includes at least one of: a set of resources for more than one transmission, a set of resources for control channels for more than one transmission.
As described above, the set of resources may comprise one or more resources, in particular at least one of time resources, frequency resources, code resources, and/or spatial resources. Accordingly, the signaling may further include allocation information.
In another implementation form of the first aspect, the sending apparatus is further configured to signal information to the receiving apparatus and/or a group of receiving apparatuses, where the information includes at least one of: an ID or index range of the determined transmission, an ID of the receiving device and/or a group of receiving devices.
In this way, reliability as well as coverage and efficiency of wireless communication are improved.
In another implementation form of the first aspect, the sending apparatus is further configured to signal information to the receiving apparatus and/or a group of receiving apparatuses, where the information includes at least one of: an indication of whether a hybrid automatic repeat request (HARQ) process is enabled for the determined transmission; the determined HARQ process number and the maximum number of HARQ processes for the transmission.
This implementation implements a feedback mechanism, thus improving efficiency.
In another implementation form of the first aspect, the sending apparatus is further configured to signal one or more resource sets to the receiving apparatus and/or a group of receiving apparatuses, where a resource set includes at least one of: time resources, frequency resources, code resources, and/or spatial resources.
In another implementation form of the first aspect, the sending apparatus is further configured to signal information to the receiving apparatus and/or a group of receiving apparatuses, where the information includes at least one of: a set of resources for more than one transmission, a set of resources for control channels for more than one transmission.
In another implementation form of the first aspect, the transmitting device is further configured to receive feedback information, in particular HARQ feedback information comprising NACKs and/or ACKs, from the receiving device and/or a group of receiving devices, respectively, in the determined resources, and to determine a retransmission of the packet and/or a number of transmissions of the retransmitted packet based on the feedback information.
By implementing such a feedback mechanism at the transmitting device, the reliability and efficiency of wireless communication is improved. The first aspect may particularly be combined with this implementation form, since the transmitting device may determine a plurality of transmissions for initially transmitting the packet and the transmitting device may determine one transmission for retransmitting the packet based on the feedback information.
In another implementation form of the first aspect, the transmitting apparatus is further configured to share the feedback information and/or the feedback resources with at least one other transmitting apparatus.
The transmitting apparatus may share one or more feedback resources with at least one other transmitting apparatus. In this way, overall reliability and coverage in the network is improved.
A second aspect of the invention provides a receiving apparatus for wireless communication, the receiving apparatus being arranged to receive packets of more than one transmission from a sending apparatus, and to combine the transmissions and/or decode at least one of the transmissions to obtain the packets.
In particular, a receiving device may decode a single transmission in an attempt to obtain a packet. If not, the receiving device may decode and combine multiple transmissions to obtain a packet. In other words, the receiving device of the second aspect may decode at least one transmission to obtain a packet.
Since the receiving apparatus of the second aspect can combine a plurality of transmissions of the same packet to obtain a packet, the reliability of obtaining a correct packet is significantly improved. Further, since each of the plurality of transmissions may be a transmission beam, the receiving device is compatible with beamforming.
In one implementation form of the second aspect, each transmission is allocated a set of resources, the set of resources including at least one time resource, frequency resource, code resource, and/or spatial resource.
As described above with respect to the transmitting apparatus of the first aspect, the multiple beam transmissions may be received in different time slots, for example.
In another implementation form of the second aspect, the receiving apparatus is further configured to send feedback information of the above-mentioned packet, in particular HARQ feedback information including ACK and/or NACK, to the sending apparatus or to another receiving apparatus in the determined resource.
In particular, the receiving device may transmit only ACK, only NACK, or both ACK and NACK to the transmitting device. For the case of sending ACK and NACK, different resources may be allocated for these feedbacks. Further, the reception apparatus may transmit only ACK, only NACK, or both ACK and NACK to another reception apparatus. For the case of sending ACKs and NACKs, the same resources (e.g., receiving device-specific feedback resources) or different resources (e.g., common feedback resources) may be allocated. Thus, the receiving device is used to implement a feedback mechanism that significantly improves the reliability and efficiency of wireless communication with the transmitting device.
In another implementation form of the second aspect, the feedback information comprises ACK and NACK, and the ACK and NACK are allocated to different resources.
In another implementation form of the second aspect, the feedback information further includes at least one of: ID of the receiving device or ID of a group of receiving devices to which the receiving device belongs, QCL reference information.
In another implementation form of the second aspect, the QCL reference information may correspond to QCL hypotheses for one or more transmissions from the transmitting device to the receiving device.
In another implementation form of the second aspect, the receiving means is further configured to send the feedback information in more than one transmission.
This improves the reliability of the feedback mechanism.
In another implementation form of the second aspect, the receiving apparatus is configured to transmit the feedback information to the transmitting apparatus on a shared channel and/or resource with other receiving apparatuses.
This reduces the overhead of the feedback mechanism.
In another implementation form of the second aspect, the receiving apparatus is further configured to receive feedback information from at least one other receiving apparatus, aggregate and/or connect the feedback information received from the first other receiving apparatus with own feedback information and/or feedback information received from the second other receiving apparatus, and send the aggregated and/or connected feedback information to the sending apparatus or other receiving apparatuses.
This allows an efficient and at the same time low overhead feedback mechanism.
In another implementation form of the second aspect, the receiving apparatus is further configured to receive feedback information including NACK or ACK and/or corresponding index from at least one other receiving apparatus, and aggregate and/or concatenate the NACK or ACK and/or corresponding index, and send the aggregated and/or concatenated feedback information to the transmitting apparatus or the other receiving apparatus.
This allows an efficient and at the same time low overhead feedback mechanism.
In another implementation form of the second aspect, the receiving apparatus is further configured to receive signaling indicating whether to send aggregated and/or connected feedback information to the sending apparatus or other receiving apparatuses.
In another implementation form of the second aspect, the receiving apparatus is further configured to receive signaling indicating whether to retransmit and/or not to transmit and/or to feedback without retransmitting the corresponding retransmission packet based on the feedback information received by the receiving apparatus.
This improves the efficiency of the feedback mechanism.
In another implementation form of the second aspect, the receiving apparatus is further configured to transmit the feedback information according to a reference timing, where the reference timing includes at least one of: a predefined time resource, a first time resource allocated to the above-mentioned more than one transmission, a time resource whose transmission channel and/or signal is quasi co-located with a channel and/or signal identified during and/or after initial access, and/or a time resource allocated to a last received transmission of the above-mentioned more than one transmission.
Note that the channels and/or signals identified during and/or after initial access may include at least one of: synchronization signal, PBCH, SSB, CSIRS, TRS, PRS, DMRS.
This further improves the efficiency of the feedback mechanism.
In another implementation form of the second aspect, the feedback information includes ACK or NACK, or includes ACK and NACK, and the determined resource is a common preamble sequence, and/or a common Physical Uplink Control Channel (PUCCH) resource, and/or a common Physical Uplink Shared Channel (PUSCH) resource for the receiving apparatus and at least one other receiving apparatus.
The common preamble sequence may be a shared preamble sequence. This improves efficiency and reduces the overhead of the feedback mechanism.
In another implementation form of the second aspect, when the feedback information comprises ACK and NACK, the receiving apparatus is configured to transmit the feedback information in different common preamble sequences, and/or different common PUCCH resources, and/or different common PUSCH resources.
The word "common" may also be replaced by "shared".
A third aspect of the present invention provides a transmission method, in particular for wireless communication, the transmission method comprising: determining more than one transmission for sending the packet, and sending the packet using the determined transmissions.
In one implementation form of the third aspect, each transmission is allocated a set of resources, the set of resources including at least one time resource, frequency resource, code resource, and/or spatial resource.
In another implementation form of the third aspect, the method further comprises determining the number of transmissions, in particular depending on whether the above-mentioned packet was initially sent or retransmitted to the receiving device and/or a group of receiving devices.
In another implementation form of the third aspect, the above-mentioned packets are transport blocks and/or code blocks, in particular transport blocks from a Medium Access Control (MAC) layer.
In another implementation form of the third aspect, the method further includes signaling information to the receiving device and/or a group of receiving devices, where the information includes at least one of: QCL assumptions and/or spatial relationships, number of transmissions, periodicity of transmissions.
In another implementation form of the third aspect, the method further includes signaling information to a receiving device or a group of receiving devices, where the information includes at least one of: an indication of whether QCL assumptions or spatial relationships are enabled, an indication of whether QCL assumptions are the same for antenna ports associated with different determined transmissions, QCL assumptions for determined transmissions, QCL parameters, and/or QCL types.
In another implementation form of the third aspect, the method further includes signaling information to the receiving device and/or a group of receiving devices, where the information includes at least one of: a set of resources for more than one transmission, a set of resources for control channels for more than one transmission.
In another implementation form of the third aspect, the method further includes signaling information to the receiving device and/or a group of receiving devices, where the information includes at least one of: an ID or index range of the determined transmission, an ID of the receiving device and/or a group of receiving devices.
In another implementation form of the third aspect, the method further includes signaling information to the receiving device and/or a group of receiving devices, where the information includes at least one of: an indication of whether a hybrid automatic repeat request (HARQ) process is enabled for the determined transmission; the determined HARQ process number and the maximum number of HARQ processes for the transmission.
In another implementation form of the third aspect, the method further comprises signaling one or more resource sets to the receiving apparatus and/or a group of receiving apparatuses, wherein a resource set comprises at least one of: time resources, frequency resources, code resources, and/or spatial resources.
In another implementation form of the third aspect, the method further includes signaling information to the receiving device and/or a group of receiving devices, where the information includes at least one of: a set of resources for more than one transmission, a set of resources for control channels for more than one transmission.
In another implementation form of the third aspect, the method further comprises receiving feedback information, in particular HARQ feedback information comprising NACKs and/or ACKs, from the receiving device and/or a group of receiving devices, respectively, in the determined resources, and determining a retransmission of the packet and/or a number of transmissions for retransmitting the packet based on the feedback information.
In another implementation form of the third aspect, the method further comprises sharing the feedback information and/or the feedback resources with at least one other transmitting apparatus.
The method of the third aspect and its implementation forms achieve the same advantages and effects as the apparatus of the first aspect and its corresponding implementation forms.
A fourth aspect of the present invention provides a receiving method, in particular for wireless communication, comprising: receiving a packet of more than one transmission, and combining the transmissions and/or decoding at least one transmission to obtain the packet.
In one implementation form of the fourth aspect, each transmission is allocated a set of resources, the set of resources including at least one time resource, frequency resource, code resource, and/or spatial resource.
In another implementation form of the fourth aspect, the method further includes transmitting feedback information of the above packet, in particular HARQ feedback information including ACK and/or NACK and ACK and NACK, to the transmitting apparatus or to another receiving apparatus in the determined resource.
In another implementation form of the fourth aspect, the feedback information comprises ACK and NACK, and the ACK and NACK are allocated to different resources.
In another implementation form of the fourth aspect, the feedback information further includes at least one of: ID of the receiving device or ID of a group of receiving devices to which the receiving device belongs, QCL reference information.
In another implementation form of the fourth aspect, the method further comprises sending the feedback information in more than one transmission.
In another implementation form of the fourth aspect, the method further comprises transmitting the feedback information to the transmitting apparatus on a shared channel and/or resource with other receiving apparatuses.
In another implementation form of the fourth aspect, the method further includes receiving feedback information from at least one other receiving apparatus, and aggregating and/or concatenating the feedback information received from the first receiving apparatus with the second feedback information and/or feedback received from the third receiving apparatus, and sending the aggregated and/or concatenated feedback information to the sending apparatus or the other receiving apparatus.
In another implementation form of the fourth aspect, the method further comprises receiving feedback information comprising NACKs or ACKs and/or corresponding indices from at least one other receiving apparatus, and aggregating and/or concatenating the NACKs or ACKs and/or corresponding indices, and transmitting the aggregated and/or concatenated feedback information to the transmitting apparatus or the other receiving apparatus.
In another implementation form of the fourth aspect, the method further comprises receiving signaling indicating whether to send aggregated and/or connected feedback information to the sending device or other receiving devices.
In another implementation form of the fourth aspect, the method further includes transmitting the feedback information according to a reference timing, where the reference timing includes at least one of: a predefined time resource, a first time resource allocated to the above-mentioned more than one transmission, a time resource whose transmission channel and/or signal is quasi co-located with a channel and/or signal identified during and/or after initial access, and/or a time resource allocated to a last received transmission of the above-mentioned more than one transmission.
In another implementation form of the fourth aspect, the feedback information comprises ACK or NACK, or both ACK and NACK, and the determined resources are common preamble sequences for the receiving apparatus and the at least one other receiving apparatus, and/or common Physical Uplink Control Channel (PUCCH) resources, and/or common Physical Uplink Shared Channel (PUSCH) resources.
In another implementation form of the fourth aspect, when the feedback information comprises ACK and NACK, the method further comprises transmitting the feedback information in a different common preamble sequence, and/or a different common PUCCH resource, and/or a different common PUSCH resource.
The method of the fourth aspect and its implementation form achieve all the advantages and effects of the receiving apparatus of the second aspect and its corresponding implementation forms.
It is noted that all means, elements, units and tools described in the present application may be implemented as software elements or hardware elements or any kind of combination thereof. All steps performed by the various entities described in this application, as well as the functions described as being performed by the various entities, are intended to mean that the various entities are adapted or configured to perform the various steps and functions. Even if in the following description of a specific embodiment a specific function or step performed by an external entity is not reflected in the description of a specific detailed element of that entity performing that specific step or function, it should be clear to a person skilled in the art that these methods and functions can be implemented in corresponding software elements or hardware elements or any kind of combination thereof.
Drawings
In the following description of specific embodiments with reference to the drawings, the above aspects and implementations of the invention will be explained,
wherein:
fig. 1 shows a transmitting apparatus according to an embodiment of the present invention.
Fig. 2 shows a receiving apparatus according to an embodiment of the present invention.
Fig. 3 illustrates a multi-beam transmission between a transmitting apparatus (gNB/RSU/UE) according to an embodiment of the present invention and a receiving apparatus (UE) according to an embodiment of the present invention.
Fig. 3A illustrates a multiple beam transmission between a transmitting apparatus (UE) according to an embodiment of the present invention and a receiving apparatus (UE) according to an embodiment of the present invention.
Fig. 4 illustrates an example of flexible binding of transmission(s) depending on whether a packet is initially sent or retransmitted.
Fig. 5 shows an overview of using more than one transmission with more than one QCL hypothesis for the same packet for unicast, broadcast, multicast, or multicast by a transmitting device according to an embodiment of the present invention.
Fig. 6 shows an exemplary channel design for a specific beam slot bonding (multiple beam transmission for the same packet).
Fig. 7 shows an exemplary channel design for a specific beam slot bonding (multiple beam transmission for the same packet).
Fig. 8 illustrates a multi-beam transmission between a transmitting apparatus (gNB/RSU/UE) according to an embodiment of the present invention and a receiving apparatus (UE) according to an embodiment of the present invention.
Fig. 8A illustrates a multiple beam transmission between a transmitting apparatus (UE) according to an embodiment of the present invention and a receiving apparatus (UE) according to an embodiment of the present invention.
Fig. 9 shows an example of a feedback mechanism from one or more receiving apparatuses (UEs) according to an embodiment of the present invention to another receiving apparatus or to a transmitting apparatus (gNB/RSU/UE) according to an embodiment of the present invention.
Fig. 9A shows an example of a feedback mechanism from one or more receiving apparatuses (UEs) according to an embodiment of the present invention to another receiving apparatus or to a transmitting apparatus (UE) according to an embodiment of the present invention.
Fig. 10 shows an exemplary overall process performed by a transmitting apparatus and a receiving apparatus according to an embodiment of the present invention.
Fig. 11 illustrates a transmission method according to an embodiment of the present invention.
Fig. 12 shows a receiving method according to an embodiment of the invention.
Detailed Description
Fig. 1 shows a transmitting
The transmitting
In particular, the
Fig. 2 shows a receiving
The receiving
In the following, details of the present invention are described with respect to the transmitting
Details of data transmission and associated control transmission are first described, specifically, beam forming and multi-beam combining and/or multi-beam transmission are considered to enhance coverage/reliability. For V2X communications, as described above, the use of more than one
Fig. 3 shows an example in which the
Fig. 3A shows an example in which the
Fig. 4 illustrates that the number of multiple (bonded)
From a standard perspective (e.g., New Radio (NR)), there are two types of physical layer (PHY) transmissions, i.e., physical channels and physical signals. The physical channel corresponds to a set of resource elements that carry information from a higher layer, such as a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH), a Physical Broadcast Channel (PBCH), a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), and the like. The physical signal corresponds to a set of resource elements used by the physical layer, but does not carry information from a higher layer, for example, a demodulation reference signal (DMRS), a Channel State Information Reference Signal (CSIRS), a phase tracking reference signal (PT-RS), a Sounding Reference Signal (SRS), and the like.
Most of the channels and signals are transmitted through the corresponding antenna ports. The antenna ports are defined for Downlink (DL) and Uplink (UL), for example, DMRS for PDSCH, DMRS for PDCCH, CSIRS, PT-RS for PDSCH, Synchronization Signal (SS)/PBCH block, DMRS for PUSCH, PT-RS for PUSCH, DMRS for PUCCH, PRACH, SRS, etc.
Without loss of generality, when another link is introduced, e.g., a sidelink (sidelink) between the receiving
The
In NR, QCL assumes the following definitions: two antenna ports are said to be quasi co-located if the large scale characteristics of the channel over which the symbols on one antenna port are transmitted can be inferred from the channel over which the symbols on the other antenna port are transmitted. The large scale features include one or more of: delay spread, doppler shift, average gain, average delay, and spatial Rx parameters. Note that in some cases, antenna ports may not be mentioned in the description of the quasi-co-location assumption. For example, the receiving apparatus 200(UE) may assume PDSCH DMRS and the SS/PBCH block are quasi co-located with respect to doppler shift, doppler spread, average delay, delay spread, and spatial Rx. The mentioned transmitting
Furthermore, from the receiving
For
In the above example, it is considered that the receiving device 200 (also referred to as "UE a") receives more than one
The more than one
In the time domain, more than one
For physical channel transmission, one embodiment may be specifically PDCCH scheduled PDSCH. It may be that one PDCCH schedules more than one PDSCH transmission, or that each PDCCH schedules one PDSCH transmission. More than one
Fig. 5 shows an overview according to which more than one
The receiving
When QCL hypotheses for DMRS antenna ports of more than one PDCCH are explicitly signaled to the receiving
Alternatively, if no independent QCL hypothesis indication is transmitted, or only one QCL hypothesis indication of DMRS for more than one PDCCH or PDSCH is transmitted, DMRS antenna ports for more than one PDCCH or PDSCH transmission may be assumed to have the same QCL hypothesis.
Further details of the signaling design to the receiving
In particular, in the first exemplary embodiment, other details of the signaling may be specific to the receiving device 200 ("UE-specific signaling") and group-specific signaling, or specific to group-specific signaling, in the case of broadcast/multicast PDCCH and/or PDSCH beamforming and QCL assumptions.
1. The UE-specific signaling or group-specific higher layer signaling (RRC signaling, MAC CE signaling, or a combination of the above) may indicate one or more of the following:
● (i.e., whether there are
● bind size (i.e., the number of
● bind size set {1,2, …, M }.
● for more than one
■ control the resource set of the channel.
Case 1: the same control resource set (CORESET) configuration for more than one
● case 2: different CORESET configurations for more than one
● indicate time units or durations, or configure consecutive time units. The time unit or duration may be downlink or uplink or sideline or flexible.
■ periods of transmission, e.g. including
● one or more cycles of the bundled
■ resource sets for more than one
● are used for bundled (time) slots or time units, e.g., beam slots.
■ predefined consecutive DL/UL slots for bundling.
● PDCCH DMRS QCL assume (or are predefined for) that, for example:
■ according to the SSB selected for initial access by each receiving apparatus 200(UE) or CRI or SSB reported by each UE or more than one SSB or CRI configured by the transmitting apparatus 100(gNB or RSU or UE).
■ or whether the DMRS of the PDSCH has the same QCL hypothesis as the DMRS of the PDCCH.
● binding/group information including one or more of:
■ identify ranges (the maximum value may be the beam number) - (1,2 … K).
■ DMRS scrambling Identity (ID) of a control channel (e.g., group PDCCH) or group data channel.
■ CRC scrambling ID of control channel (e.g., group PDCCH) or group data channel.
■ binding/group ID or index.
2. For PDSCH, group-specific Downlink Control Information (DCI) may indicate one or more of the following:
● an indication of "no binding" or "binding size" from a higher level configuration set.
■ when a binding is not configured via higher layer signaling, a 0 bit in the DCI is used for the binding.
● a binding identification indication from a higher level configuration set.
● PDSCH DMRS.
●MCS。
● redundancy version.
● HARQ process number.
Note that, when the bundling identifier is configured, the receiving
Several alternative examples are given below for the PDCCH DMRS QCL assumption in binding:
● substitution 1: each receiving
■ a bind size {3 }; { SSB1, SSB2, SSB3} or { CRI1, CRI2, CRI3 }:
■ the receiving
● alternative 2: each receiving
■ example: more than one bind size: binding size set {1,2 }; QCL reference sets SSB1,2, SSB2,3, SSB3, or CRI1, CRI2, CRI2, CRI3, CRI 3:
● the receiving
● for group 1 of receiving
● for group 2 of receiving
● for the receiving
● alternative 3: each receiving
■ example: one binding size {2 }; { SSB1, SSB2}, { SSB2, SSB3 }:
● for group 1 of receiving
● for group 2 of receiving
● for group 3 of receiving
● instead of 4: each receiving
■ example: binding size {2,3 }; { SSB1,2,3}, { SSB4,5 }:
● the beam slot transmission of beams 1,2,3 is bound to one BD; the beam slot transmissions of beams 4 and 5 are bound to another BD. For initial access: the sets 1 to 5 of receiving
● for group 1 of receiving
● for group 2 of receiving
● for group 3 of receiving
● for group 4 of receiving
● for group 5 of receiving
In an exemplary second embodiment, with respect to unicast PDCCH and PDSCH beamforming and QCL assumptions, other details of signaling may be UE-specific higher layer signaling or UE-specific DCI or a combination of higher layer signaling and DCI:
1. the UE-specific higher layer signaling may indicate one or more of the following:
● are bound.
● bind the size.
● bind size sets, e.g., {1,2, …, M }.
● for more than one
■ resource set of control channel
● are for example more than one CORESET that transmits 101 the control channel. CORESET may be configured or a continuous time unit may be configured. The frequency offset between different CORESET can be configured.
■ periods of transmission, e.g. including
● bind one or more cycles of
■ resource sets for more than one
● are used for bundled (time) slots or time units, e.g., beam slots.
Omicron, e.g., configured time slots or time units or configured contiguous time slots or time units for binding
■ predefined consecutive DL/UL slots for bundling.
● maximum number of HARQ processes for bundling
● QCL signaling on PDCCH with time slots bound
■ QCL set of PDCCH, { SSB index 1, …, SSB index N } or { CRI1, …, CRIN }, N > -1
● first PDCCH and SSB quasi co-location (QCled) associated with a preamble (e.g., SSB index 1)
■ or whether PDSCH has the same QCL hypothesis as PDCCH
2. For PDSCH, UE-specific DCI may indicate one or more of the following:
● bound size, e.g.
■ indications from a set configured by higher layer signaling
■ when the binding is not configured via higher layer signaling, bit 0 in the DCI is used for binding
● bind the time slots.
● QCL assumptions for PDSCH DMRS in bonded transmissions
● PDSCH DMRS scrambling ID
● HARQ process number.
●MCS
● bind QCL hypotheses for more than one PDSCH DMRS in
The scrambling IDs of more than one PDSCH DMRS in the bundled
Redundancy versions of more than one PDSCH in bundled
MCS of more than one PDSCH in bundled
Note that for the above two exemplary embodiments, there may be two cases for the bundled transmission PDSCH indication. One case is a separate PDCCH or a separate DCI, each indicating one or more of the following: QCL hypothesis (or assuming the same QCL as its corresponding PDCCH), bundled slots, scrambling ID, redundancy version, allocation, HARQ process number. Another case is that one DCI or one PDCCH indicates one or more of each bundling unit: QCL hypothesis, bonded slots, scrambling ID, redundancy version, allocation.
For PDCCH resource allocation (as exemplarily shown in fig. 6), one case is that each of more than one
As shown in fig. 6, for unicast or multicast/multicast DCI transmitted by PDCCH, the content may include one or more of: MCS, HARQ ACK/NACK Resource Allocation (RA), HARQ process, redundancy version, unicast or multicast/multicast indication, multicast/multicast identification.
Another case is that more than one
Note that when
Note that each search space may correspond to one or more configured CORESET for PDCCH search, and vice versa.
For physical channel transmission (as exemplarily shown in fig. 7), another embodiment is a dedicated PHY broadcast/multicast channel. More than one
Fig. 7 shows dedicated channel-PBMCH transmission with more than one QCL hypothesis carrying the
Next, a feedback mechanism performed by the receiving
When a receiving device 200 (also referred to as "UE a") receives more than one
Note that the QCL reference information may correspond to QCL assumptions for one or more transmissions from the transmitting device to the receiving device, e.g., QCL assumption parameters or types with SSBs or CRIs.
When more than one
The receiving
Alternatively, the receiving
Note that the feedback resources for each feedback transmission or feedback transmission of the same feedback content may correspond to one or
To reduce the feedback overhead for group communication, a shared channel may be configured for each
The feedback information and the resource or shared channel carrying the feedback information may be exchanged between different transmitting
Fig. 8 shows an example. When a receiving device 200(UE) receives data from a transmitting device 100(gNB or RSU and/or UE) via more than one transmission 101 (here a beam), the receiving
Fig. 8A shows an example. When a receiving device 200(UE) receives data from a transmitting device 100(UE, e.g., a leading UE) via more than one transmission 101 (here, a beam), the receiving
Feedback spatial relationship assumptions and shared channels have been discussed previously. On feedback timing, in particular for HARQ-ACK/NACK, there are two options for UE group specific or UE specific reference time slot (or time unit) + time offset for HARQ feedback.
Option 1: the reference slot is a slot having a QCL hypothesis with a CRI for initial access or SSB during initial access or configuration after initial access.
Option 2: the reference slot is the last slot in the binding.
Option 1UE group specific or UE specific reference time for feedback facilitates early feedback and early retransmission. The advantage of option 2 is simplicity in case the last slot is not signaled.
Another exemplary embodiment may include the receiving apparatus 200(UE a) receiving feedback information from another receiving apparatus 200(UE B). UE B may retransmit when it receives a NACK. Alternatively, UE B may aggregate or connect feedback information and send to the transmitting device 100 (node a) according to the configuration or when UE B does not properly receive data from node a.
The feedback transmission configuration for UE B reception may include one or more of the following: feedback timing, feedback resources, HARQ processes feeding back associated data, redundancy versions feeding back associated data, and the like.
The feedback information or content may include one or more of the following: ACK and/or NACK, QCL reference information associated with the data/packet DMRS antenna port (e.g., QCL hypothesis with SSB or CRI), associated UE identification information, RNTI of the UE, timing of its reception of packets/data, resources of its reception of packets/data.
As an example, fig. 9 illustrates cross-link transmission. The transmitting apparatus 100(gNB or RSU) transmits group information to more than one receiving apparatus 200(UE, e.g., UE a and UE B) and/or the transmitting apparatus 100(UE, e.g., UE B) transmits group information to more than one receiving apparatus. UE a and UE B belong to the same group. UE B is a selected/configured UE responsible for communicating with the gNB or RSU on behalf of the group. For example, UE B may be selected as the leading UE because UE B has a better channel condition with the gNB or RSU in the group. The
As an example, fig. 9A illustrates cross-link transmission. The transmitting apparatus 100(UE B) transmits group information to more than one receiving apparatus 200(UE, e.g., UE a). UE a and UE B belong to the same group. UE B is a selected/configured UE responsible for communicating with the gNB or RSU on behalf of the group. For example, UE B may be selected as the leading UE because UE B has a better channel condition with the gNB or RSU in the group. The same packet is sent from UE B to UE a in a different transmission 101 (here a beam). UE a may feed back ACKs and/or NACKs to UE B.
Next, the overall process of the present invention implemented by the transmitting
Fig. 10 shows an overall process including transmission and feedback parts, which are performed by the
Fig. 11 shows a transmission method 1100 according to an embodiment of the invention, in particular for wireless communication. The transmission method 1100 may be performed by the
Fig. 12 shows a receiving method 1200 according to an embodiment of the invention, in particular for wireless communication. The receiving method 1200 may be performed by the receiving
The invention has been described in connection with various embodiments by way of example and implementation. However, other variations will be understood and effected by those skilled in the art and practicing the claimed invention, from a study of the drawings, the disclosure, and the independent claims. In the claims as well as in the description, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single element or other unit may fulfill the functions of several entities or items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
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