Method and apparatus for mapping beam patterns to paging resources
阅读说明:本技术 将波束图案映射到寻呼资源的方法和装置 (Method and apparatus for mapping beam patterns to paging resources ) 是由 B·帕利延多 A·贝里格伦 于 2019-01-22 设计创作,主要内容包括:用于在无线通信系统中操作并使用多发送波束的基站(12)的寻呼包括根据第一波束图案通过波束扫描发送同步信号突发集合。基站根据基于第一波束图案的预定映射来确定用于寻呼操作的第二波束图案的寻呼资源的分配。基站使用利用预定映射确定的寻呼资源,根据第二波束图案发送寻呼消息。(Paging of a base station (12) for operation in a wireless communication system and using multiple transmit beams includes transmitting a set of synchronization signal bursts through a beam sweep according to a first beam pattern. The base station determines allocation of paging resources for a second beam pattern for a paging operation according to a predetermined mapping based on the first beam pattern. The base station transmits a paging message according to the second beam pattern using a paging resource determined using a predetermined mapping.)
1. A method for paging of base stations (12) operating in multiple beams in a wireless communication system, the method comprising the steps of:
transmitting (64) a set of synchronization signal bursts by beam scanning according to a first beam pattern;
determining (66), based on the first beam pattern, an allocation of paging resources for a second beam pattern for a paging operation according to a predetermined mapping, wherein the predetermined mapping maps more than one beam of the first beam pattern to a single paging slot of the paging resources; and
transmitting (68) a paging message according to the second beam pattern using a paging resource selected with the predetermined mapping.
2. The method of claim 1, wherein the paging message is divided into a control portion and a data portion such that transmitting the paging message comprises:
transmitting the control portion in accordance with the second beam pattern using the first subset of paging resources; and
transmitting the data portion according to the second beam pattern using a second subset of the paging resources.
3. The method of claim 1 or 2, wherein the predetermined mapping maps beams of the first beam pattern to more than one paging slot of the paging resource.
4. The method of any of claims 1-3, wherein the predetermined mapping allocates beams of the second beam pattern to paging resources first on a frequency basis and then on a time basis.
5. The method of claim 4, wherein the predetermined mapping allocates beams from lowest frequencies to highest frequencies of the paging resources.
6. The method of any of claims 1-5, wherein the predetermined mapping allocates beams across more than one bandwidth portion of the wireless communication system.
7. The method of claim 6, wherein the predetermined mapping allocates a control portion of the paging message to initial bandwidth portions of all beams and allocates a data portion of the paging message to beams spanning the more than one bandwidth portions.
8. The method of claim 7, wherein the control portion of the paging message comprises a pointer to the data portion of one or more bandwidth portions.
9. A base station (12) operating with multiple beams, the base station (12) comprising:
a wireless interface (28) through which wireless communications with an electronic device (14) are performed over multiple beams; and
a control circuit (18), the control circuit (18) configured to control paging of the base station (12), wherein the control circuit (18) causes the base station (12) to:
transmitting (64) a set of synchronization signal bursts by beam scanning according to a first beam pattern, wherein the first beam pattern specifies respective transmissions of respective synchronization signal blocks by respective beams in respective synchronization slots;
determining (66) an allocation of paging resources for a second beam pattern of a paging message based on the first beam pattern and according to a predetermined mapping, wherein the predetermined mapping maps at least two beams of the first beam pattern to a specific time resource allocation or a specific frequency resource allocation; and is
Transmitting (68) the paging message according to the second beam pattern using paging resources determined with the predetermined mapping.
10. The base station of claim 9, wherein the control circuitry (18) further causes the base station (12) to provide the predetermined mapping to the electronic device via Radio Resource Control (RRC) signaling.
11. The base station of any of claims 9 or 10, wherein the base station transmits at least one of the paging messages within a period corresponding to the set of synchronization signal bursts.
12. The base station of any of claims 9 to 11, wherein the predetermined mapping maps more than one beam of the first beam pattern to a single paging slot of the paging resource.
13. The base station of any of claims 9 to 12, wherein the predetermined mapping first allocates beams to paging resources on a frequency basis.
14. A method of receiving paging messages in an electronic device (14) operating in a wireless communication system having multiple beams, the method comprising:
receiving (70) a synchronization signal transmitted by the base station (12) using a beam sweep of a plurality of beams according to a first beam pattern;
identifying (70) a preferred beam from the plurality of beams;
determining (74), based on a predetermined mapping, paging resources corresponding to paging messages transmitted via the preferred beam; and
receiving (78) the paging message on the preferred beam at the paging resource determined according to the predetermined mapping.
15. The method of claim 14, wherein the predetermined mapping maps more than one of the plurality of beams to a single paging slot of the paging resource.
16. The method of any of claims 14 or 15, wherein the predetermined mapping maps one of the plurality of beams to more than one paging slot of the paging resource.
17. The method of any of claims 14 to 16, wherein the predetermined mapping allocates beams of the plurality of beams to paging resources first on a frequency basis and then on a time basis.
18. The method of claim 17, wherein the predetermined mapping allocates the beams from lowest frequency to highest frequency of the paging resource.
19. The method of any of claims 14 to 18, wherein the predetermined mapping allocates the beams across more than one bandwidth portion of the wireless communication system.
20. The method of claim 19, wherein the predetermined mapping allocates a control portion of the paging message to an initial bandwidth portion of all beams and allocates a data portion of the paging message to beams spanning the more than one bandwidth portion.
21. An electronic device (14), the electronic device (14) comprising:
a wireless interface (38) through which wireless communication with a base station (12) is performed on multiple beams; and
control circuitry (30), the control circuitry (30) configured to control paging of the electronic device (14), wherein the control circuitry (38) configures the electronic device (14) to perform the method of any of claims 14-20.
Technical Field
The technology of the present disclosure relates generally to wireless communication between electronic devices in a network environment, and more particularly, to methods and apparatus for mapping base station beam patterns to paging resources.
Background
The demand for data services on wireless communication systems continues to grow. Due to the wide commercialization of fourth generation (4G) wireless systems such as a Long Term Evolution (LTE) system or an LTE-advanced (LTE-a) system standardized by the third generation partnership project (3GPP), next generation wireless systems are being developed. Once proposed by 3GPP, such systems are fifth generation (5G) or New Radio (NR) wireless systems.
To meet the demand for higher data rates, wireless systems desire to use the unlicensed spectrum band. A high frequency band (e.g., millimeter wave) may provide a high data rate, but the signal power may decrease faster as the signal propagates compared to a low frequency band system. In order to provide wider coverage, beamforming techniques may be utilized on both the base station side and the User Equipment (UE) side.
With the development of 5G systems, various aspects of LTE and/or LTE-a systems are being borrowed. However, these aspects were originally designed for lower frequency bands where massive multiple-input multiple-output (MIMO) devices are not typically deployed. Therefore, the leverage aspect must take into account the multi-beam operation to be suitable for 5G systems. For example, 5G base stations or gnbs are known to synchronize with beam scanning during multi-beam operation. The technique enables the UE to acquire a synchronization signal block without setting an optimal beam in advance between the gNB and the UE. Paging of UEs introduces additional challenges during multi-beam operation. For example, without an omni-directional paging message, the UE may stay awake for a longer duration to acquire the paging message via the best beam, thereby consuming more battery power. Moreover, using beam scanning for paging messages in a manner similar to synchronization would use a large amount of paging resources and may increase latency.
Disclosure of Invention
The disclosed method provides idle/inactive paging for multi-beam operation. As opposed to utilizing omni-directional antennas, a base station may operate to support multiple beams pointing in different directions. The base station may perform beam scanning to enable synchronization. Typically, with beam scanning, the base station transmits information on each beam. The information transmitted may or may not be different for each beam. For synchronization, in particular, each beam may carry a Synchronization Signal Block (SSB) in a different time slot, such that during scanning, an SSB is transmitted on only one beam at a given time. The SSB may contain a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). In one example, at least the PBCH portion of the SSB may differ between beams.
A User Equipment (UE) may receive SSBs on one or more beams and determine a best or preferred transmit beam. When a UE is to be paged, the base station may not know the best or preferred transmit beam from the UE's perspective. Thus, the base station may use a form of beam scanning for the paging message. In particular, a mapping may be configured between synchronization signal blocks on a beam and resources suitable for receiving paging messages on a corresponding beam of the paging message. Thus, once the UE determines the best transmission beam, the UE knows the resources of the paging message on the corresponding paging beam based on the mapping.
According to one aspect of the disclosure, a method for paging of a base station utilizing multi-beam operation in a wireless communication system, the method comprising: transmitting a set of synchronization signal bursts by beam scanning according to a first beam pattern; determining a paging resource allocation for a second beam pattern for a paging operation according to a predetermined mapping based on the first beam pattern; and transmitting a paging message according to the second beam pattern using a paging resource determined using the predetermined mapping.
According to one embodiment of the method, the predetermined mapping maps more than one beam of the first beam pattern to a single paging slot of the paging resource.
According to one embodiment of the method, the paging message is divided into a control portion and a data portion such that transmitting the paging message comprises: transmitting the control portion according to the second beam pattern using the first subset of paging resources; and transmitting the data portion according to the second beam pattern using the second subset of paging resources.
According to one embodiment of the method, the predetermined mapping maps one beam of the first beam pattern to more than one paging slot of the paging resource.
According to one embodiment of the method, the predetermined mapping first allocates beams of the second beam pattern to paging resources on a frequency basis and then on a time basis.
According to one embodiment of the method, the predetermined mapping allocates beams from lowest frequencies to highest frequencies of the paging resource.
According to one embodiment of the method, the predetermined mapping allocates beams across more than one bandwidth portion of the wireless communication system.
According to one embodiment of the method, the predetermined mapping allocates a control portion of the paging message to initial bandwidth portions of all beams and allocates a data portion of the paging message to beams spanning more than one bandwidth portion.
According to one embodiment of the method, the control portion of the paging message includes a pointer to a data portion of the one or more bandwidth portions.
According to another aspect of the present disclosure, a base station operating with multiple beams includes a wireless interface through which wireless communication with an electronic device is performed on the multiple beams; and control circuitry configured to control paging of the base station, wherein the control circuitry causes the base station to: transmitting a set of synchronization signal bursts by beam scanning according to a first beam pattern, wherein the first beam pattern specifies respective transmissions of respective synchronization signal blocks by respective beams in respective synchronization slots; determining an allocation of paging resources for a second beam pattern of a paging message based on the first beam pattern and according to a predetermined mapping that maps at least two beams of the first beam pattern to a specific time resource allocation or a specific frequency resource allocation; transmitting a paging message according to the second beam pattern using a paging resource determined using the predetermined mapping.
According to one embodiment of the base station, the control circuitry further causes the base station to provide the predetermined mapping to the electronic device via Radio Resource Control (RRC) signaling.
According to one embodiment of the base station, the base station transmits at least one paging message in a period corresponding to a set of synchronization signal bursts.
According to one embodiment of the base station, the predetermined mapping maps more than one beam of the first beam pattern to a single paging slot of the paging resource.
According to one embodiment of the base station, the predetermined mapping allocates beams to paging resources first on a frequency basis and then on a time basis.
According to another aspect of the present disclosure, a method of receiving a paging message in an electronic device in a wireless communication system having multiple beams includes: receiving a synchronization signal transmitted by a base station using a beam sweep of a plurality of beams according to a first beam pattern; identifying a preferred beam from the plurality of beams; determining a paging resource corresponding to a paging message transmitted via the preferred beam based on a predetermined mapping; and receiving a paging message on the preferred beam at a paging resource determined according to a predetermined mapping.
According to one embodiment of the method, the predetermined mapping maps more than one of the plurality of beams to a single paging slot of the paging resource.
According to one embodiment of the method, the predetermined mapping maps one of the plurality of beams to more than one paging slot of the paging resource.
According to one embodiment of the method, the predetermined mapping first allocates a beam of the plurality of beams to a paging resource on a frequency basis.
According to one embodiment of the method, the predetermined mapping allocates beams from lowest frequencies to highest frequencies of the paging resource.
According to one embodiment of the method, the predetermined mapping allocates beams across more than one bandwidth portion of the wireless communication system.
According to one embodiment of the method, the predetermined mapping allocates a control portion of the paging message to initial bandwidth portions of all beams and allocates a data portion of the paging message to beams spanning more than one bandwidth portion.
According to another aspect of the present disclosure, an electronic device includes: a wireless interface through which wireless communication with a base station is performed over multiple beams; and control circuitry configured to control paging, wherein the control circuitry configures the electronic device to: receiving a synchronization signal transmitted by a base station using beam scanning of a plurality of beams according to a first beam pattern; identifying a preferred beam from the plurality of beams; determining a paging resource corresponding to a paging message transmitted via the preferred beam based on a predetermined mapping; and receiving a paging message on the preferred beam at a paging resource determined according to a predetermined mapping.
Drawings
Fig. 1 is a schematic block diagram of a network system that maps synchronization signal resources to paging resources for multi-beam wireless radio communication.
Fig. 2 is a schematic block diagram of an electronic device forming part of the network system of fig. 1.
Fig. 3 is a schematic diagram of the network system of fig. 1, according to one aspect.
Fig. 4 is a schematic diagram of a general procedure for establishing a connection in multi-beam operation.
Fig. 5 is a flow chart of a representative method of transmitting a paging message at a base station of a network system.
Fig. 6 is a flow chart of an exemplary method of receiving a paging message at an electronic device of a network system.
Fig. 7 is a diagram of a mapping technique between synchronization signal resources and paging resources.
Fig. 8 is a diagram of a mapping technique between synchronization signal resources and paging resources.
Fig. 9 is a diagram of another mapping technique between synchronization signal resources and paging resources.
Fig. 10 is a diagram of another mapping technique between synchronization signal resources and paging resources.
Fig. 11 is a diagram of another mapping technique between synchronization signal resources and paging resources.
Fig. 12 is a diagram of another mapping technique between synchronization signal resources and paging resources.
Detailed Description
Introduction to
Embodiments will now be described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. It will be understood that the figures are not necessarily to scale. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
Various embodiments of systems and methods for paging in multi-beam wireless radio communications are described below in conjunction with the appended drawings. The mapping process may be performed by various devices in an automated manner to identify corresponding paging resources. The mapping process described herein may reduce resource utilization for paging, provide efficient resource management, and allow dynamic configuration.
System architecture
FIG. 1 is a schematic diagram of an
The
In one embodiment,
The code 22 and any stored data (e.g., data associated with operation of the base station 12) may be stored on the memory 24. The code may be embodied in the form of executable logic routines (e.g., software programs) stored as a computer program product on a non-transitory computer readable medium (e.g., memory 24) of the
The memory 24 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a Random Access Memory (RAM), or other suitable device. In a typical arrangement, the memory 24 includes non-volatile memory for long-term data storage and volatile memory that serves as system memory for the control circuit 18. The memory 24 is considered to be a non-transitory computer readable medium.
The
The
As shown in fig. 2, each
The code 34 and any stored data (e.g., data associated with the operation of the electronic device 14) may be stored on the memory 36. The code 34 may be embodied in the form of an executable logic routine (e.g., a software program) stored as a computer program product on a non-transitory computer readable medium (e.g., memory 36) of the
The memory 36 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a Random Access Memory (RAM), or other suitable device. In a typical arrangement, the memory 36 includes non-volatile memory for long-term data storage and volatile memory that serves as system memory for the control circuit 30. The memory 36 is considered to be a non-transitory computer-readable medium.
The
Other components of the
Paging procedure for multi-beam operation
Referring to fig. 3,
Turning to fig. 4, an exemplary diagram depicting a general procedure 46 for a base station (e.g., base station 12) and a UE (e.g., electronic device 14) prior to establishing an RRC connection is shown. In an example, for mobile terminal traffic (i.e., network-initiated downlink data), the UE may be configured to receive a paging message 50 at a predetermined time (e.g., based on a Discontinuous Reception (DRX) cycle) to inform the UE that data is waiting. After receiving the paging message 50, the UE performs a random access procedure 52 to establish an RRC connection 54.
The UE may perform synchronization 48 with the base station prior to receiving the paging message 50. For multi-beam operation, the base station may transmit a set of Synchronization Signal (SS) bursts 56, the set of synchronization signal bursts 56 including a Synchronization Signal Block (SSB)58 for each beam 60 employed by the base station. In the example shown in fig. 4 and used throughout the specification, the base station utilizes eight transmit beams. It should be understood, however, that a base station may employ substantially any number of beams, and the example number of beams utilized herein is constructed for purposes of description and should not be viewed as limiting. In some embodiments, the base station may use up to 64 beams for SSB transmissions.
As shown in fig. 4, the set of SS bursts 56 may be divided in the time domain such that SSBs 58 for each beam 60 are transmitted in different time slots. During synchronization 48, the UE may identify the best or preferred beam 62 for reception. According to one aspect, the preferred beam 62 may be a receive beam corresponding to a particular transmit beam 60 of the base station.
In order to page while the UE may have identified the preferred beam 62 during synchronization 48, the base station may still not know which beam is considered the best beam from the UE's perspective. In other words, since no report is received from the UE at this stage, the base station may not know whether the UE is reachable or whether beam 62 is the best beam for the UE. Thus, in some examples, the base station may employ beam scanning techniques similar to beam scanning for synchronization. That is, the base station may repeat the same paging message multiple times (e.g., once per beam). To support this technique, each paging occasion may be subdivided into slots, and each beam transmits paging messages in a different slot.
When the UE has synchronized to one of the base station's transmit beams 60 (i.e., identified the preferred beam 62), the UE can know on which paging occasion's slot to receive the paging message with the preferred beam 62. The configuration information may specify a correspondence between the synchronization beam and the paging beam. That is, the base station may inform the UE of the mapping between the transmission beam and the paging slot. With this mapping, for example, the UE may not need to stay awake for the entire paging operation, but may only wake up a particular slot corresponding to the preferred beam 62. However, with this approach, the amount of paging resources consumed, as well as the latency, may increase as the number of beams employed by the base station increases.
Referring to fig. 5, an exemplary flow chart representing steps that may be performed by
The logical flow of performing a paging operation may begin in block 64 with reference to actions performed by the
During operation, the
To support the paging procedure during multi-beam operation, the paging occasion may be divided into a plurality of paging slots. In one embodiment, the plurality of paging slots may include one or more slots up to a number of slots corresponding to the number of beams employed by
In block 66, the
The mapping may allocate paging resources to particular beams divided in the time domain, the frequency domain, or both. Also, the mapping may be a many-to-one mapping such that for the first beam pattern, more than one beam maps to the same time resource (i.e., slot), the same frequency resource, or both. In other words, a particular paging resource may be used by more than one beam of the transmitting SSB to transmit a paging message.
Turning briefly to FIG. 7, an exemplary mapping is depicted. In this example, the set of SS bursts 56 may be transmitted using the first beam pattern 85 such that each beam of the first beam pattern 85 corresponds to a respective SSB 58. For paging DRX cycle 86,
In the related example mapping shown in fig. 8, the paging message is divided into a paging control portion 91 (e.g., Downlink Control Information (DCI)) and a paging data portion 93 for a given paging occasion 88. The second beam pattern is determined taking into account the first beam pattern 85. As shown in fig. 8, the second beam pattern (e.g., beam pattern 92 in fig. 7) is used for both the paging control part 91 and the paging data part 93.
In another embodiment, if the
Referring to fig. 9-11, other exemplary mappings are illustrated. In 5G systems, especially in the millimeter wave frequency range, the bandwidth may be very wide. The wide bandwidth may be divided into multiple bandwidth portions. In view of this system configuration, beam patterns for SSB transmission can be mapped not only in time but also in frequency. In one embodiment, the mapping follows a frequency first rule such that the mapping occurs in the frequency domain before occurring in the time domain.
As shown in fig. 9-11, for a given
In the second technique 100 shown in fig. 10, FDM of the paging slot is extended to other BWPs. This technique 100 may be utilized when the width of the initial
In the
Referring back to FIG. 6, exemplary actions performed by the
In block 72, the
In block 74, the
In block 76, the
Referring now to fig. 12, another aspect of paging in accordance with an exemplary embodiment is illustrated. The paging occasion for the paging message is typically determined based on the UE identifier (e.g., IMSI) and DRX cycle. As shown in fig. 12, the paging occasions may also be based on BWP such that the paging occasions 112 and 118 occur in different BWPs.
Conclusion
Although certain embodiments have been shown and described, it is understood that equivalents and modifications which fall within the scope of the appended claims will occur to others skilled in the art upon the reading and understanding of this specification.
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