Beam reporting
The described beam reporting framework addresses the inefficiencies in current systems by allowing user equipment to transmit beam-related information based on specific time instances, enhancing the efficiency of AI/ML model inference and reducing uplink control channel overhead.
Patent Information
- Application Number
- PCT/CN2024/100234
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-05-30
AI Technical Summary
Current wireless communication systems face challenges in efficiently reporting beam measurements and predicted beam results, particularly in AI/ML model inference at both network and user equipment sides, due to limitations in existing beam reporting frameworks.
The proposed solution involves a framework for beam reporting where user equipment (UE) performs beam measurements on a first set of beams and transmits beam-related information of a second set of beams in a beam report. This information is determined based on beam measurements and a configuration for beam reporting, with the second set of beams corresponding to specific time instances after or during the beam measurements.
This approach enables efficient beam reporting, reducing uplink control channel overhead while ensuring that relevant beam information is accurately conveyed, thereby supporting improved AI/ML model inference and data/control channel transmission.
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Figure CN2024100234_30052025_PF_FP_ABST
Abstract
Description
BEAM REPORTINGTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to a user equipment (UE) , a network device, processors for wireless communication, methods, and non-transitory computer readable media for beam reporting.BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .
[0003] For artificial intelligence / machine learning (AI / ML) model inference at the network side, the UE shall report measured beams to the network for model input; for AI / ML model inference at the UE side, the UE shall report predicted beam results to the network for beam indication for data / control channel transmission. Further study on beam reporting is still needed.SUMMARY
[0004] The present disclosure relates to methods, apparatuses, and systems that support beam reporting. By transmitting beam-related information of a second set of beams corresponding to at least one first time instance after the beam measurements or at least one second time instance of the beam measurements in a beam report based on beam measurements on a first set of beams, a framework of beam reporting may be designed.
[0005] In a first aspect of the solution, a UE performs beam measurements on a first set of beams. The UE transmits, to a network device, beam-related information of a second set of beams in a beam report. The beam-related information is determined based on the beam measurements and a configuration for beam reporting. The second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements. In this way, a framework of beam reporting may be designed.
[0006] In some implementations of the methods and apparatuses described herein, the beam-related information may include at least one of the following: beam information indicative of beams among the second set of beams; information of beam quality of the second set of beams; probability information indicative of respective probabilities of beams among the second set of beams as a best beam for the UE; or confidence information indicative of respective confidences of the information of beam quality of the second set of beams.
[0007] In some implementations of the methods and apparatuses described herein, the configuration for beam reporting may include at least one of the following: a number of reported beams for a same time instance; a maximum number of reported beams for a same time instance; a minimum number of reported beams for a same time instance; a first threshold of beam quality for beam reporting; a beam quality quantization method for beam reporting; an indication of reporting a type of beam quality for beam reporting; a type of beam quality for beam reporting; an indication of reporting a probability that a reported beam is a best beam for the UE; a second threshold of a probability that a reported beam is a best beam for the UE; a third threshold of a confidence of a beam quality of a reported beam; a fourth threshold for determining the at least one first time instance; or an indication of a report method for beam information.
[0008] In some implementations of the methods and apparatuses described herein, the beam quality may include at least one of the following: a signal-to-interference-plus-noise ratio (SINR) ; a signal-to-noise ratio (SNR) ; reference signal received power (RSRP) ; a received signal strength indication (RSSI) ; or a reference signal received quality (RSRQ) .
[0009] Some implementations of the method and apparatuses described herein may further include: determining the second set of beams based on the beam measurements. At least one of the following is satisfied: a difference between a beam quality of a beam among the second set of beams and a best beam quality among the beam qualities of the second set of beams is no greater than the first threshold; a probability that a beam among the second set of beams is a best beam for the UE is greater than the second threshold; or a confidence of a beam quality of a beam among the second set of beams is greater than the third threshold.
[0010] In some implementations of the methods and apparatuses described herein, the first set of beams may include the second set of beams. Alternatively, at least one beam among the second set of beams is not comprised in the first set of beams.
[0011] In some implementations of the methods and apparatuses described herein, the type of beam quality may include one of the following: a measured beam quality or a predicted beam quality.
[0012] In some implementations of the methods and apparatuses described herein, the configuration for beam reporting may include at least one of the following: a number of reported time instances; a maximum number of reported time instances; a minimum number of reported time instances; a time interval between a reference point associated with the beam report and a time instance, among time instances corresponding to reported beams, most recent to the reference point; or a time interval between two adjacent time instances corresponding to reported beams.
[0013] In some implementations of the methods and apparatuses described herein, the reference point associated with the beam report may include one of the following: a time point when the beam report is transmitted; a channel status information (CSI) reference resource corresponding to the beam report; a time point when a physical downlink control channel (PDCCH) triggering the beam report is received; or a time point associated with a reference signal transmission corresponding to the beam report.
[0014] In some implementations of the methods and apparatuses described herein, the configuration for beam reporting may include a length of a time window for reported time instances.
[0015] Some implementations of the method and apparatuses described herein may further include: determining the at least one first time instance at least based on the beam measurements and the fourth threshold; and determining the second set of beams corresponding to the at least one first time instance based on the beam measurements and at least one of the first, second or third threshold.
[0016] In some implementations of the methods and apparatuses described herein, the number of beams among the second set of beams for a same time instance is no less than the minimum number of reported beams for a same time instance, and is no more than the maximum number of reported beams for a same time instance.
[0017] In some implementations of the methods and apparatuses described herein, the number of time instances among the at least one first time instance is no less than the minimum number of reported time instances and is no more than the maximum number of reported time instances.
[0018] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, the configuration for beam reporting.
[0019] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, at least one configuration for beam reporting, wherein the at least one configuration for beam reporting may include the configuration for beam reporting; and receiving, from the network device, an indication of the configuration for beam reporting.
[0020] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, at least one configuration for beam reporting including the configuration for beam reporting; and selecting the configuration for beam reporting from the at least one configuration for beam reporting. The beam report may include an indication of the configuration for beam reporting.
[0021] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, a portion of the configuration for beam reporting; and determining a remaining portion of the configuration for beam reporting; wherein the beam report may include an indication of the remaining portion of the configuration for beam reporting.
[0022] Some implementations of the method and apparatuses described herein may further include: determining the configuration for beam reporting. The beam report may include an indication of the configuration for beam reporting.
[0023] In some implementations of the methods and apparatuses described herein, the beam measurements are performed at one time instance. The at least one second time instance may include the time instance. The beam-related information may include beam information indicative of beams among the second set of beams. When transmitting the beam-related information in the beam report, the UE may report a respective index for each beam among the second set of beams.
[0024] In some implementations of the methods and apparatuses described herein, the beam measurements are performed at one time instance. The at least one second time instance may include the time instance. The beam-related information may include beam information indicative of beams among the second set of beams. When transmitting the beam-related information in the beam report, the UE may report a bitmap corresponding to a set of candidate beams. The set of candidate beams may include the second set of beams. Each bit of the bitmap is indicative of whether a respective candidate beam is comprised in the second set of beams.
[0025] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When transmitting the beam-related information in the beam report, the UE may, for a time instance of the one or more time instances, report a respective index for each beam among a subset of beams corresponding to the time instance in the second set of beams.
[0026] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When transmitting the beam-related information in the beam report, the UE may, for a beam among the second set of beams, report a respective index for the beam and a first time stamp indicator. The first time stamp indicator is indicative of at least one time instance among the one or more time instances corresponding to the beam.
[0027] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When transmitting the beam-related information in the beam report, the UE may report a bitmap corresponding to a set of candidate beams and a respective second time stamp indicator for a beam among the second set of beams. The set of candidate beams may include the second set of beams. A bit of the bitmap indicative of whether a respective candidate beam is comprised in the second set of beams, the second time stamp indicator being indicative of at least one time instance among the one or more time instances corresponding to the beam.
[0028] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When transmitting the beam-related information in the beam report, the UE may, for a time instance of the one or more time instances, report a bitmap corresponding to a set of candidate beams, the set of candidate beams may include the second set of beams, a bit of the bitmap indicative of whether a respective candidate beam is reported for the time instance.
[0029] In some implementations of the methods and apparatuses described herein, the beam-related information may include the information of beam quality of the second set of beams. Some implementations of the method and apparatuses described herein may further include: quantitating the information of beam quality of the second set of beams based on: for a time instance among the at least one first time instance or the at least one second time instance, differential quantization of information of beam quality of the second set of beams of beams among the second set of beams corresponding to the time instance.
[0030] In some implementations of the methods and apparatuses described herein, the beam-related information may include the information of beam quality of the second set of beams. Some implementations of the method and apparatuses described herein may further include: if the at least one first time instance or the at least one second time instance includes a plurality of time instances, quantitating the information of beam quality of the second set of beams based on differential quantization of information of beam quality of the second set of beams of the second set of beams over the plurality of time instances.
[0031] In some implementations of the methods and apparatuses described herein, the beam-related information may include the information of beam quality of the second set of beams. Some implementations of the method and apparatuses described herein may further include: if the at least one first time instance or the at least one second time instance includes a plurality of time instances, quantitating the information of beam quality of the second set of beams based on differential quantization of information of beam quality of the second set of beams of a same beam between different time instances.
[0032] In some implementations of the methods and apparatuses described herein, the beam-related information may include the probability information. Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, a configuration of a first mapping relationship between probability values and quantified probability values; and quantitating the probability information based on the first mapping relationship.
[0033] In some implementations of the methods and apparatuses described herein, the beam-related information may include the confidence information. Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, a configuration of a second mapping relationship between confidence values and quantified confidence values; and quantitating the confidence information based on the second mapping relationship.
[0034] In some implementations of the methods and apparatuses described herein, the beam report may include: a first part indicative of at least partial information of the configuration for beam reporting; and a second part containing the beam-related information, wherein the second part is determined based on the first part.
[0035] In some implementations of the methods and apparatuses described herein, the beam report may include: a first part indicative of at least partial information of the configuration for beam reporting and a portion of the beam-related information; and a second part containing a remaining portion of the beam-related information, wherein the second part is determined based on the first part.
[0036] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The portion of the beam-related information may include at least one of the following: beam-related information of one time instance among the one or more time instances; the number of time instances among the one or more time instances; or an indication of the time instance.
[0037] In some implementations of the methods and apparatuses described herein, the time instance is an earliest time instance among the one or more time instances. In some implementations of the methods and apparatuses described herein, the time instance is a last time instance among the one or more time instances.
[0038] In some implementations of the methods and apparatuses described herein, the time instance is a time instance corresponding to a reported beam with a best beam quality over the one or more time instances.
[0039] In some implementations of the methods and apparatuses described herein, the first part is used to identify at least one of the following: the number of bits of information in the second part; or contents in the second part.
[0040] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, a beam indication indicative of a plurality of transmission configuration indicator (TCI) states.
[0041] In some implementations of the methods and apparatuses described herein, the beam indication may include: an indication of the plurality of TCI states; and an indication of a time interval between a time point of receiving the beam indication and a starting point for applying a first TCI state among the plurality of TCI states.
[0042] Some implementations of the method and apparatuses described herein may further include: determining a duration during which a TCI state of the plurality of TCI states applies.
[0043] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, an indication of a first time length that the TCI state applies.
[0044] Some implementations of the method and apparatuses described herein may further include: receiving, from the network device, an indication of a second time length; and receiving, from the network device, a respective time indicator for the TCI state. A respective duration of the TCI state is determined based on the respective time indicator for the TCI state and the second time length.
[0045] In a second aspect of the solution, a network device transmits, to a UE, reference signals on a first set of beams for beam measurements; and receives, from the UE, beam-related information of a second set of beams in a beam report. The beam-related information is determined based on the beam measurements and a configuration for beam reporting. The second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements. In this way, a framework of beam reporting may be designed.
[0046] In some implementations of the methods and apparatuses described herein, the beam-related information may include at least one of the following: beam information indicative of beams among the second set of beams; information of beam quality of the second set of beams; probability information indicative of respective probabilities of beams among the second set of beams as a best beam for the UE; or confidence information indicative of respective confidences of the information of beam quality of the second set of beams.
[0047] In some implementations of the methods and apparatuses described herein, the configuration for beam reporting may include at least one of the following: a number of reported beams for a same time instance; a maximum number of reported beams for a same time instance; a minimum number of reported beams for a same time instance; a first threshold of beam quality for beam reporting; a beam quality quantization method for beam reporting; an indication of reporting a type of beam quality for beam reporting; a type of beam quality for beam reporting; an indication of reporting a probability that a reported beam is a best beam for the UE; a second threshold of a probability that a reported beam is a best beam for the UE; a third threshold of a confidence of a beam quality of a reported beam; a fourth threshold for determining the at least one first time instance; or an indication of a report method for beam information.
[0048] In some implementations of the methods and apparatuses described herein, the beam quality may include at least one of the following: a signal-to-interference-plus-noise ratio (SINR) ; a signal-to-noise ratio (SNR) ; reference signal received power (RSRP) ; a received signal strength indication (RSSI) ; or a reference signal received quality (RSRQ) .
[0049] In some implementations of the methods and apparatuses described herein, at least one of the following is satisfied: a difference between a beam quality of a beam among the second set of beams and a best beam quality among the beam qualities of the second set of beams is no greater than the first threshold; a probability that a beam among the second set of beams is a best beam for the UE is greater than the second threshold; or a confidence of a beam quality of a beam among the second set of beams is greater than the third threshold.
[0050] In some implementations of the methods and apparatuses described herein, the first set of beams may include the second set of beams. Alternatively, at least one beam among the second set of beams is not comprised in the first set of beams.
[0051] In some implementations of the methods and apparatuses described herein, the type of beam quality may include one of the following: a measured beam quality or a predicted beam quality.
[0052] In some implementations of the methods and apparatuses described herein, the configuration for beam reporting may include at least one of the following: a number of reported time instances; a maximum number of reported time instances; a minimum number of reported time instances; a time interval between a reference point associated with the beam report and a time instance, among time instances corresponding to reported beams, most recent to the reference point; or a time interval between two adjacent time instances corresponding to reported beams.
[0053] In some implementations of the methods and apparatuses described herein, the reference point associated with the beam report may include one of the following: a time point when the beam report is received; a channel status information (CSI) reference resource corresponding to the beam report; a time point when a physical downlink control channel (PDCCH) triggering the beam report is transmitted; or a time point associated with a reference signal transmission corresponding to the beam report.
[0054] In some implementations of the methods and apparatuses described herein, the configuration for beam reporting may include a length of a time window for reported time instances.
[0055] In some implementations of the methods and apparatuses described herein, the number of beams among the second set of beams for a same time instance is no less than the minimum number of reported beams for a same time instance, and is no more than the maximum number of reported beams for a same time instance.
[0056] In some implementations of the methods and apparatuses described herein, the number time instances among the at least one first time instance is no less than the minimum number of reported time instances and is no more than the maximum number of reported time instances.
[0057] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, the configuration for beam reporting.
[0058] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, at least one configuration for beam reporting, wherein the at least one configuration for beam reporting may include the configuration for beam reporting; and transmitting, to the UE, an indication of the configuration for beam reporting.
[0059] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, at least one configuration for beam reporting. The at least one configuration for beam reporting may include the configuration for beam reporting. The beam report may include an indication of the configuration for beam reporting.
[0060] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, a portion of the configuration for beam reporting. The beam report may include an indication of a remaining portion of the configuration for beam reporting.
[0061] In some implementations of the methods and apparatuses described herein, the beam report may include an indication of the configuration for beam reporting.
[0062] In some implementations of the methods and apparatuses described herein, the beam measurements are performed at one time instance. The at least one second time instance may include the time instance. The beam-related information may include beam information indicative of beams among the second set of beams. When receiving the beam-related information in the beam report, the network device may receive, from the UE, a respective index for each beam among the second set of beams; or
[0063] In some implementations of the methods and apparatuses described herein, the beam measurements are performed at one time instance. The at least one second time instance may include the time instance. The beam-related information may include beam information indicative of beams among the second set of beams. When receiving the beam-related information in the beam report, the network device may receive, from the UE, a bitmap corresponding to a set of candidate beams. The set of candidate beams may include the second set of beams. Each bit of the bitmap is indicative of whether a respective candidate beam is comprised in the second set of beams.
[0064] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When receiving the beam-related information in the beam report, for a time instance of the one or more time instances, the network device may receive, from the UE, a respective index for each beam among a subset of beams corresponding to the time instance in the second set of beams.
[0065] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When receiving the beam-related information in the beam report, for a beam among the second set of beams, the network device may receive, from the UE, a respective index for the beam and a first time stamp indicator. The first time stamp indicator is indicative of at least one time instance among the one or more time instances corresponding to the beam.
[0066] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When receiving the beam-related information in the beam report, the network device may receive, from the UE, a bitmap corresponding to a set of candidate beams and a respective second time stamp indicator for a beam among the second set of beams. The set of candidate beams may include the second set of beams. A bit of the bitmap indicative of whether a respective candidate beam is comprised in the second set of beams. The second time stamp indicator is indicative of at least one time instance among the one or more time instances corresponding to the beam.
[0067] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances. The beam-related information may include beam information indicative of beams among the second set of beams. When receiving the beam-related information in the beam report, for a time instance of the one or more time instances, the network device may receive, from the UE, a bitmap corresponding to a set of candidate beams. The set of candidate beams may include the second set of beams. A bit of the bitmap indicative of whether a respective candidate beam is reported for the time instance.
[0068] In some implementations of the methods and apparatuses described herein, the beam-related information may include the information of beam quality of the second set of beams. The information of beam quality of the second set of beams is quantitated based on: for a time instance among the at least one first time instance or the at least one second time instance, differential quantization of information of beam quality of the second set of beams of beams among the second set of beams corresponding to the time instance.
[0069] In some implementations of the methods and apparatuses described herein, the beam-related information may include the information of beam quality of the second set of beams. If the at least one first time instance or the at least one second time instance includes a plurality of time instances, the information of beam quality of the second set of beams is quantitated based on: differential quantization of information of beam quality of the second set of beams of the second set of beams over the plurality of time instances.
[0070] In some implementations of the methods and apparatuses described herein, the beam-related information may include the information of beam quality of the second set of beams. If the at least one first time instance or the at least one second time instance includes a plurality of time instances, the information of beam quality of the second set of beams is quantitated based on: differential quantization of information of beam quality of the second set of beams of a same beam between different time instances.
[0071] In some implementations of the methods and apparatuses described herein, the beam-related information may include the probability information. Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, a configuration of a first mapping relationship between probability values and quantified probability values. The probability information is quantitated based on the first mapping relationship.
[0072] In some implementations of the methods and apparatuses described herein, the beam-related information may include the confidence information. Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, a configuration of a second mapping relationship between confidence values and quantified confidence values. The confidence information is quantitated based on the second mapping relationship.
[0073] In some implementations of the methods and apparatuses described herein, the beam report may include: a first part indicative of at least partial information of the configuration for beam reporting; and a second part containing the beam-related information, wherein the second part is determined based on the first part.
[0074] In some implementations of the methods and apparatuses described herein, the beam report may include: a first part indicative of at least partial information of the configuration for beam reporting and a portion of the beam-related information; and a second part containing a remaining portion of the beam-related information, wherein the second part is determined based on the first part.
[0075] In some implementations of the methods and apparatuses described herein, the at least one first time instance or the at least one second time instance may include one or more time instances, the portion of the beam-related information may include at least one of the following: beam-related information of one first time instance among the one or more time instances; the number of time instances among the one or more time instances; or an indication of the time instance.
[0076] In some implementations of the methods and apparatuses described herein, the time instance is an earliest time instance among the one or more time instances. In some implementations of the methods and apparatuses described herein, the time instance is a last time instance among the one or more time instances.
[0077] In some implementations of the methods and apparatuses described herein, the time instance is a time instance corresponding to a reported beam with a best beam quality over the one or more time instances.
[0078] Some implementations of the method and apparatuses described herein may further include: identifying at least one of the following based on the first part: the number of bits of information in the second part; or contents in the second part.
[0079] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, a beam indication indicative of a plurality of transmission configuration indicator (TCI) states.
[0080] In some implementations of the methods and apparatuses described herein, the beam indication may include: an indication of the plurality of TCI states; and an indication of a time interval between a time point of receiving the beam indication and a starting point for applying a first TCI state among the plurality of TCI states.
[0081] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, an indication of a first time length that a TCI state among the plurality of TCI states applies.
[0082] Some implementations of the method and apparatuses described herein may further include: transmitting, to the UE, an indication of a second time length; and transmitting, to the UE, a respective time indicator for a TCI state among the plurality of TCI states. A respective duration of the TCI state is determined based on the respective time indicator for the TCI state and the second time length.BRIEF DESCRIPTION OF THE DRAWINGS
[0083] FIG. 1 illustrates an example of a wireless communications system that supports beam reporting in accordance with aspects of the present disclosure.
[0084] FIG. 2 illustrates an example signaling chart of an example process that supports beam reporting in accordance with aspects of the present disclosure.
[0085] FIGS. 3A and 3B illustrate example diagrams of time instances for reported beams in accordance with aspects of the present disclosure.
[0086] FIG. 4A illustrates an example diagram of beam information in accordance with aspects of the present disclosure.
[0087] FIG. 4B illustrates another example diagram of beam information in accordance with aspects of the present disclosure.
[0088] FIG. 5 illustrates an example of a device that supports beam reporting in accordance with aspects of the present disclosure.
[0089] FIG. 6 illustrates an example of a processor that support beam reporting in accordance with aspects of the present disclosure.
[0090] FIGS. 7 through 8 illustrate flowcharts of methods that support beam reporting in accordance with aspects of the present disclosure.DETAILED DESCRIPTION
[0091] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.
[0092] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0093] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0094] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0095] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. For example, the term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “based at least in part on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The use of an expression such as “A and / or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.
[0096] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as, 5G NR, long term evolution (LTE) , LTE-advanced (LTE-A) , wideband code division multiple access (WCDMA) , high-speed packet access (HSPA) , narrow band internet of things (NB-IoT) , and so on. Further, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.
[0097] As used herein, the term “network device” generally refers to a node in a communication network via which a terminal device can access the communication network and receive services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a remote radio unit (RRU) , a radio header (RH) , an infrastructure device for a V2X (vehicle-to-everything) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto BS, a pico BS, and so forth, depending on the applied terminology and technology.
[0098] As used herein, the term “terminal device” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a terminal device may also be referred to as a communication device, a user equipment (UE) , an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable terminal device, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture terminal device such as a digital camera, a gaming terminal device, a music storage and playback appliance, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, wireless customer-premises equipment (CPE) , an internet of things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device (for example, a remote surgery device) , an industrial device (for example, a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms: “terminal device, ” “communication device, ” “terminal, ” “user equipment” and “UE, ” may be used interchangeably.
[0099] Beam measurement, e.g., L1-RSRP, is usually reported as a kind of CSI quantity through CSI report. In detail, For L1-RSRP reporting, if the higher layer parameter nrofReportedRS in CSI-ReportConfig is configured to be one, the reported L1-RSRP value is defined by a 7-bit value in the range [-140, -44] dBm with 1dB step size, if the higher layer parameter nrofReportedRS is configured to be larger than one, or if the higher layer parameter groupBasedBeamReporting is configured as 'enabled' , or if the higher layer parameter groupBasedBeamReporting-r17 is configured, the UE shall use differential L1-RSRP based reporting, where the largest measured value of L1-RSRP is quantized to a 7-bit value in the range [-140, -44] dBm with 1dB step size, and the differential L1-RSRP is quantized to a 4-bit value. The differential L1-RSRP value is computed with 2 dB step size with a reference to the largest measured L1-RSRP value which is part of the same L1-RSRP reporting instance.
[0100] If the higher layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "notConfigured" , the UE shall derive the channel measurements for computing L1-RSRP value reported in uplink slot n based on only the SS / PBCH or NZP CSI-RS, no later than the CSI reference resource, associated with the CSI resource setting.
[0101] If the higher layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured" , the UE shall derive the channel measurements for computing L1-RSRP reported in uplink slot n based on only the most recent, no later than the CSI reference resource, occasion of SS / PBCH or NZP CSI-RS associated with the CSI resource setting.
[0102] The UE can be configured with a list of up to 128 TCI-State configurations, within the higher layer parameter dl-OrJointTCI-StateList in PDSCH-Config for providing a reference signal for the quasi co-location for DM-RS of PDSCH and DM-RS of PDCCH in a BWP / CC, for CSI-RS, and to provide a reference, if applicable, for determining UL TX spatial filter for dynamic-grant and configured-grant based PUSCH and PUCCH resource in a BWP / CC, and SRS.
[0103] The UE receives an activation command used to map up to 8 TCI states and / or pairs of TCI states, with one TCI state for DL channels / signals and / or one TCI state for UL channels / signals to the codepoints of the DCI field 'Transmission Configuration Indication' for one or for a set of CCs / DL BWPs, and / or up to 8 sets of TCI states, where each set is comprised of up to two TCI state (s) for DL and UL signals / channels, or up to two TCI state (s) for DL channels / signals and up to two TCI state (s) for UL channels / signals to the codepoints of the DCI field 'Transmission Configuration Indication' for one or for a set of CCs / DL BWPs, and if applicable, for one or for a set of CCs / UL BWPs. When a set of TCI state IDs are activated for a set of CCs / DL BWPs and if applicable, for a set of CCs / UL BWPs, where the applicable list of CCs is determined by the indicated CC in the activation command, the same set of TCI state IDs are applied for all DL and / or UL BWPs in the indicated CCs. If the activation command maps TCI-State (s) and / or TCI-UL-State (s) to only one TCI codepoint, the UE shall apply the indicated TCI-State (s) and / or TCI-UL-State (s) to one or to a set of CCs / DL BWPs, and if applicable, to one or to a set of CCs / UL BWPs once the indicated mapping for the one single TCI codepoint is applied.
[0104] When a UE supports two TCI states in a codepoint of the DCI field 'Transmission Configuration Indication' the UE may receive an activation command, the activation command is used to map up to 8 combinations of one or two TCI states to the codepoints of the DCI field 'Transmission Configuration Indication' . The UE is not expected to receive more than 8 TCI states in the activation command.
[0105] When the DCI field 'Transmission Configuration Indication' is present in DCI format 1_2 and when the number of codepoints S in the DCI field 'Transmission Configuration Indication' of DCI format 1_2 is smaller than the number of TCI codepoints that are activated by the activation command, only the first S activated codepoints are applied for DCI format 1_2.
[0106] When a UE supports two TCI states in a codepoint of the DCI field 'Transmission Configuration Indication' the UE may receive an activation command, the activation command is used to map up to 8 combinations of one or two TCI states to the codepoints of the DCI field 'Transmission Configuration Indication' . The UE is not expected to receive more than 8 TCI states in the activation command.
[0107] When the DCI field 'Transmission Configuration Indication' is present in DCI format 1_2 and when the number of codepoints S in the DCI field 'Transmission Configuration Indication' of DCI format 1_2 is smaller than the number of TCI codepoints that are activated by the activation command, only the first S activated codepoints are applied for DCI format 1_2.
[0108] AI / ML based beam prediction includes two use cases, i.e., BM-case1 and BM-case2.
[0109] BM-case1 refers to spatial-domain downlink beam prediction for Set A of beams based on measurement results of Set B of beams, which considers: AI / ML model training and inference at NW side, or AI / ML model training and inference at UE side. The relationship between Set A and Set B considers that Set A and Set B are different (Set B is NOT a subset of Set A) , or Set B is a subset of Set A. It should be noted that Set A is for DL beam prediction. AI / ML model input considers only L1-RSRP measurement based on Set B; L1-RSRP measurement based on Set B and assistance information; channel impulse response (CIR) based on Set B; or L1-RSRP measurement based on Set B and the corresponding DL Tx and / or Rx beam ID.
[0110] BM-Case2 refers to temporal downlink beam prediction for Set A of beams based on the historic measurement results of Set B of beams, which considers: Alt. 1) : AI / ML model training and inference at NW side; Alt. 2) : AI / ML model training and inference at UE side. The relationship between Set A and Set B considers Set A and Set B are different (Set B is NOT a subset of Set A) ; Set B is a subset of Set A (Set A and Set B are not the same) ; or Set A and Set B are the same. AI / ML model input considers measurement results of K (K≥1) latest measurement instances with the following alternatives, including only L1-RSRP measurement based on Set B, L1-RSRP measurement based on Set B and assistance information, or L1-RSRP measurement based on Set B and the corresponding DL Tx and / or Rx beam ID. F predictions for F future time instances can be obtained based on the output of AI / ML model, where each prediction is for each time instance, where the F at least equals to 1.
[0111] Set B is a set of beams whose measurements are taken as inputs of the AI / ML model.
[0112] As mentioned above, for AI / ML model inference at the network side, the UE shall report measured beams to the network for model input; for AI / ML model inference at the UE side, the UE shall report predicted beam results to the network for beam indication for data / control channel transmission. In case of temporal beam prediction, multiple past beam measurements or multiple predicted future results may be reported in one report to save UL signaling overhead. The reported beam measurements or predicted results have different alternations, e.g., beam index, L1-RSRP and / or probability as the best beam etc. In one aspect, from the perspective of physical layer reporting, how the UE gets what it shall report and how to report should be designed. Based on this direction, further study is needed on how to report beams over multiple time instances. In another aspect, UCI overhead reduction for beam reporting needs to be considered because a mass of beams would be reported in a beam report.
[0113] In view of the above and other aspects, embodiments of the present disclosure provide solutions for beam reporting. Aspects of the present disclosure are described in the context of a wireless communications system.
[0114] FIG. 1 illustrates an example of a wireless communications system 100 that supports beam reporting in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0115] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
[0116] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0117] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.
[0118] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0119] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0120] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .
[0121] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.
[0122] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0123] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.
[0124] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0125] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0126] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0127] In some embodiments, the core network 106 may further include a location server, e.g., a location management function (LMF) . The LMF may receive measurements and assistance information from the network entity 102 and the UE 104 via the AMF to compute the position of the UE 104. A NR positioning protocol A (NRPPa) protocol was introduced to carry the positioning information between RAN and LMF over the next generation control plane interface (NG-C) . The LMF and the network entity 102 may communicate using the NRPPa defined in 3GPP TS 38.455, where NRPPa messages are communicated between the network entity 102 and the LMF via an AMF. The LMF and the UE 104 may communicate using the LTE Positioning Protocol (LPP) defined in 3GPP TS 36.355, where LPP messages are communicated between the UE 104 and the LMF via a serving AMF and a serving network entity for the UE. For example, LPP messages may be communicated between the LMF and the AMF using hypertext transfer protocol (HTTP) -based service operations, and LPP messages may be communicated between the AMF and the UE using a 5G non-access stratum (NAS) protocol. The LPP protocol may be used to support positioning of the UE using UE-assisted and / or UE-based positioning methods, such as assisted GNSS (a-GNSS) , Real Time Kinematics (RTK) , Wireless Local Area Network (WLAN) , observed time difference of arrival (OTDOA) , and / or Enhanced Cell Identity (ECID) . The NRPPa protocol may be used to support positioning of UE using network-based positioning methods, such as ECID (when used with measurements obtained by the network entity 102) , and / or the NRPPa protocol may be used by the LMF to obtain location-related information from the network entity 102, such as parameters defining Positioning Reference Signal (PRS) transmissions from the network entity 102 and the location of the network entity 102, to support OTDOA and ECID.
[0128] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0129] In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0130] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0131] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0132] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0133] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0134] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0135] FIG. 2 illustrates an example signaling chart of an example process 200 that supports beam reporting in accordance with aspects of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1, and the process 200 may involve a UE 104 and a network entity 102 as shown in FIG. 1. The network entity 102 may be implemented as a base station. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. It is to be understood that process 200 may further include additional blocks not shown and / or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.
[0136] As shown in FIG. 2, the base station 102 transmits 201, to the UE 104, reference signals 202 on a first set of beams for beam measurements. The UE 104 performs 203 beam measurements on the first set of beams. Then, the UE 104 transmits 204, to the base station 102, beam-related information 205 of a second set of beams in a beam report. The base station 102 receives 206 the beam-related information 205 accordingly. The beam-related information 205 is determined based on the beam measurements and a configuration for beam reporting. In other words, the UE 104 may report beam-related information based on beam report related configuration in a beam report. In some embodiments, the second set of beams corresponds to at least one first time instance after the beam measurements. In other words, the UE 104 transmits predicted beam-related information over at least one future time instance in the beam report. Alternatively, the second set of beams corresponds to at least one second time instance of the beam measurements. In other words, the UE 104 transmits measured beam-related information over at least one past time instances in the beam report.
[0137] In some embodiments, the beam-related information 205 may include beam information indicative of beams among the second set of beams. Alternatively or additionally, the beam-related information 205 may include information of beam quality of the second set of beams. Alternatively or additionally, the beam-related information 205 may include probability information indicative of respective probabilities of beams among the second set of beams as a best beam for the UE 104. Alternatively or additionally, the beam-related information 205 may include confidence information indicative of respective confidences of the information of beam quality of the second set of beams. In some embodiments, the beam quality may include at least one of the following: a signal-to-interference-plus-noise ratio (SINR) ; a signal-to-noise ratio (SNR) ; reference signal received power (RSRP) ; a received signal strength indication (RSSI) ; or a reference signal received quality (RSRQ) .
[0138] For example, the beam-related information 205 may include beam indices indicating one or more reported beam (s) . Alternatively, the beam-related information 205 may indicate the reported beams using a bitmap. For each of the reported beam (s) , the beam-related information 205 may further include information of beam quality of the second set of beams indicating the beam quality (e.g., RSRP, SNR, RSRP, RSSI, or RSRQ, etc. ) of the reported beam, probability information indicating a probability of the reported beam as the best beam for the UE 104, confidence information indicating a confidence of the information of beam quality of the second set of beams of the reported beam.
[0139] In some embodiments, the beam-related information 205 may be determined and reported based on the configuration for beam reporting. The configuration for beam reporting may be determined in various manners and may include various related configurations. For example, the configuration for beam reporting may include a number of reported beams for a same time instance. In this way, the UE 102 may report the same number of beams for each time instance. Alternatively, the configuration for beam reporting may include at least one of a maximum number of reported beams for a same time instance or a minimum number of reported beams for a same time instance. In some embodiments, the number of beams among the second set of beams for a same time instance is no less than the minimum number of reported beams for a same time instance, and is no more than the maximum number of reported beams for a same time instance. With the maximum number of reported beams for a same time instance, the resource overhead for beam reporting may be reduced. With the minimum number of reported beams for a same time instance, enough beam-related information may be reported supporting the base station 102 to (predict and) indicate the proper TCI state. Alternatively or additionally, the configuration for beam reporting may include a beam quality quantization method for beam reporting. For example, the configuration for beam reporting may include an indicative of RSRP quantization method. Alternatively or additionally, the configuration for beam reporting may include an indication of a report method for beam information, e.g., CSI-RS resource indicator (CRI) , synchronization signal / PBCH block resource indicator (SSBRI) , bitmap, or other methods.
[0140] Alternatively or additionally, the configuration for beam reporting may include an indication of reporting a type of beam quality for beam reporting. In other words, based on such configuration, the UE 104 is required to indicate the beam quality type in the beam report. In some embodiments, the type of beam quality may include one of the following: a measured beam quality or a predicted beam quality. For example, for a BM-case1 based on UE-sided model, the UE 104 may determine at least one best beam as the second set of beams based on the beam measurements on the first set of beams. Beam (s) among the second set of beams may be included or not included in the measured beams. If a reported beam is included in the measured beams, the beam quality information for this beam may be measured beam quality information; if a reported beam is not included in the measured beams, the beam quality information for this beam may be predicted beam quality information. If the base station 102 indicates the UE 104 to report a type of beam quality for beam reporting, the UE 104 may report whether the reported beam quality information for each beam is measured beam quality information or predicted beam quality information. Alternatively or additionally, the configuration for beam reporting may include a type of beam quality for beam reporting. For example, the base station 102 may indicate the UE 104 to report predicted RSRP of reported beams.
[0141] Alternatively or additionally, the configuration for beam reporting may include an indication of reporting a probability that a reported beam is a best beam for the UE 104. Alternatively or additionally, the configuration for beam reporting may include a first threshold of beam quality for beam reporting. Alternatively or additionally, the configuration for beam reporting may include a second threshold of a probability that a reported beam is a best beam for the UE 104. Alternatively or additionally, the configuration for beam reporting may include a third threshold of a confidence of a beam quality of a reported beam. Alternatively or additionally, the configuration for beam reporting may include a fourth threshold for determining the at least one first time instance, i.e., a threshold that is used to determine reported time instance (s) .
[0142] In some embodiments, the UE 104 may determine the second set of beams based on the beam measurements. The second set of beams may be determined based on at least one of the first, second or third threshold. For example, a difference between a beam quality of a beam among the second set of beams and a best beam quality among the beam qualities of the second set of beams is no greater than the first threshold. Alternatively or additionally, a probability that a beam among the second set of beams is a best beam for the UE 104 is greater than the second threshold. Alternatively or additionally, a confidence of a beam quality of a beam among the second set of beams is greater than the third threshold.
[0143] As a specific example, the UE 104 may determine reported beam (s) based on the configuration for beam reporting. In detail, the UE 104 may determine one or more beams based on at least one of the first, second or third threshold. Beam-related information of these beams would be actually reported in the beam report according to the network configuration. For example, the UE 104 may report beam-related information of beam whose differential RSRP with reference to the largest RSRP is no greater than the first threshold, or beam-related information of beams with a probability greater than the second threshold or with a confidence greater than the third threshold. For a BM-case1, the UE 104 may determine reported beam (s) for the measurement time instance using such manner. For beam reporting in BM-case1 based on BS-sided model, the first set of beams may include the second set of beams. For beam reporting in BM-case1 based on UE-sided model, the first set of beams may include the second set of beams or at least one beam among the second set of beams may be not included in the first set of beams. Similarly, for BM-case2, the UE 104 may determine reported beam (s) for each time instance using such manner.
[0144] For the BM-case2, the UE 104 may further determine time instances corresponding to the reported beams. In some embodiments, the configuration for beam reporting may include at least one of the following: a time interval between two adjacent time instances corresponding to reported beams; or a time interval between a reference point associated with the beam report and a time instance, among time instances corresponding to reported beams, most recent to the reference point. In this way, the distribution of candidate time instances may be determined In some embodiments, the reference point associated with the beam report may include a time point when the beam report is transmitted. Alternatively, the reference point associated with the beam report may include a channel status information (CSI) reference resource corresponding to the beam report. Alternatively, the reference point associated with the beam report may include a time point when a physical downlink control channel (PDCCH) triggering the beam report is received. Alternatively, the reference point associated with the beam report may include a time point associated with a reference signal transmission corresponding to the beam report.
[0145] In some embodiments, the configuration for beam reporting may include a length of a time window for reported time instances. In other words, time instances within the time window may be reported. In some embodiments, the configuration for beam reporting may include a number of reported time instances. In some embodiments, the configuration for beam reporting may include at least one of a maximum number of reported time instances or a minimum number of reported time instances. In some embodiments, the number of time instances among the at least one first time instance is no less than the minimum number of reported time instances and is no more than the maximum number of reported time instances.
[0146] In some embodiments, the UE 104 may determine the at least one first time instance at least based on the beam measurements and the fourth threshold. The UE 104 may determine the second set of beams corresponding to the at least one first time instance based on the beam measurements and at least one of the first, second or third threshold.
[0147] FIG. 3A illustrates an example diagram of time instances for reported beams in accordance with aspects of the present disclosure. In the example in FIG. 3A, the configuration for beam reporting may include parameters n, δ and i. The parameter n may be the number of reported time instances or a maximum number of reported time instances. A reference point may be implicitly indicated and may be prior to the n time instances. The parameter δ may be a time interval between a reference point and the time instance most recent to the reference point (i.e., the earliest time instance) among the n time instances. The parameter i may be a time interval between two adjacent time instances. The UE may determine reported beam (s) and reported time instance (s) based on the beam report related information. In detail, as shown in FIG. 3A, the UE may determine n time instances based on the parameters n, δ, and i, where the earliest time instance among the n time instances is the time instance offsetting δ from a reference point, and each of the remaining time instance is the time instance offsetting i from a previous time instance. In an example, the reference point may be the slot when the beam report is transmitted or the CSI reference resource corresponding to the beam report, or the last slot of RS transmission corresponding to the beam report. In another example, if the beam report is aperiodic, the reference point may be the slot when a PDCCH triggering the beam report is received. In some embodiments, the n time instances may include time instances after beam measurements associated with the beam report.
[0148] FIG. 3B illustrates another example diagram of time instances for reported beams in accordance with aspects of the present disclosure. In the example in FIG. 3B, the configuration for beam reporting may include parameters n, δ and i. The parameter n may be the number of reported time instances or a maximum number of reported time instances. A reference point may be implicitly indicated and may be after the n time instances. The parameter δ may be a time interval between a reference point and the time instance most recent to the reference point (i.e., the last time instance) among the n time instances. The parameter i may be a time interval between two adjacent time instances. The UE may determine reported beam (s) and reported time instance (s) based on the beam report related information. In detail, as shown in FIG. 3B, the UE may determine n time instances based on the parameters n, δ, and i, where the last time instance is the time instance that starts from δ slots before the reference point, and each of the remaining time instance is the time instance offsetting i from an adjacent time instance. In an example, the reference point may be the slot of the PUSCH / PUCCH carrying the beam report or the CSI reference resource corresponding to the beam report. The n time instances may include time instances of beam measurements associated with the beam report.
[0149] In some embodiments, the parameter n may be the number of reported time instances and the UE may determine beam-related information corresponding to the n time instances. The UE may report beam-related information of all the n time instances. Alternatively, the parameter n may be the maximum number of reported time instances, and the UE may determine reported time instances from the n time instance candidates based on the fourth threshold or UE implementation. For example, the reported time instances may be those in which a sum of best beam probabilities of all reported beams is not less than the fourth threshold. Time instances with a sum of best beam probabilities of all reported beams less than the fourth threshold would not be reported. The configuration for beam reporting may further include a parameter n_min. The parameter n_min may be the minimum number of reported time instances. If the number of the reported time instances determined based on the fourth threshold is less than the n_min, the UE may report beam-related information of n_min time instance candidates. For example, the reported time instances may be time instances located most recent to beam measurement instance corresponding to the beam report. For each reported time instance, the UE 104 may determine one or more beams based on at least one of the first, second or third threshold.
[0150] Turning back to FIG. 2, in some embodiments, the configuration for beam reporting may be aligned between the UE 104 and the base station 102. In this way, the UE 104 and the base station 102 may have a common understanding on the contents of the beam-related information in the beam report.
[0151] In some embodiments, the UE 104 may receive the configuration for beam reporting from the base station 102. In other words, the base station 102 may configure the configuration for beam reporting. In some embodiments, the UE 104 may receive, from the base station 102, at least one configuration for beam reporting which includes the configuration for beam reporting. The UE 104 may receive an indication of the configuration for beam reporting from the base station 102. In other words, the base station 102 may configure one or more configurations for beam reporting by a higher layer signaling, then the base station 102 may further indicate one of these configurations for beam reporting for a beam report by a MAC CE or a DCI. For example, an information element may be introduced for configuring a list of the configurations for beam reporting in the CSI reporting configuration. Examples of configurations for beam reporting may include the number of reported beams in one time instance: {1, 2, 4, 8} , beam information report method: {CRI / SSB-RI, bitmap} , etc. If a CSI reporting configuration is activated for beam reporting by a MAC CE, one or more elements of the list may be indicated by the MAC CE. If a CSI reporting configuration is triggered by a DCI, one of the elements of the list may be indicated by the DCI.
[0152] In some embodiments, the UE 104 may receive, from the base station 102, at least one configuration for beam reporting which includes the configuration for beam reporting. The UE 104 may select the configuration for beam reporting from the at least one configuration for beam reporting. The beam report may include an indication of the configuration for beam reporting. In other words, the base station 102 may configure a plurality of configurations for beam reporting, then the UE 104 may select one of those configurations to determine the beam-related information and indicate the selected configuration along with the beam-related information in the beam report. In an example, a table of configurations for beam reporting is configured by the base station 102 using RRC signalling as shown in Table 1 where each row of the table is one combination of configuration for beam reporting, then the UE 104 may select one combination and report the beam-related information based on the selected combination in an uplink control information (UCI) , and the codepoint corresponding to the selected combination may be also indicated in the UCI.
[0153] Table 1 Example configurations for beam reporting
[0154] In some embodiments, the UE 104 may receive a portion of the configuration for beam reporting from the base station 102 and determine a remaining portion of the configuration for beam reporting. The beam report may include an indication of the remaining portion of the configuration for beam reporting. For example, the base station 102 may configure partial configuration for beam reporting, e.g., the number of reported beams in one time instance, and the UE 104 may determine other partial configuration for beam reporting, e.g., the RSRP quantization method and the beam information report method. The UE 104 may report beam-related information based on the two partial configurations for beam reporting and indicates the partial configuration for beam reporting determined by itself.
[0155] In some embodiments, the UE 104 may determine the configuration for beam reporting. The beam report may include an indication of the configuration for beam reporting. In other words, the UE 104 may determine configuration for beam reporting and indicate the configuration for beam reporting determined by itself when reporting the beam-related information.
[0156] In some embodiments, the beam measurements may be performed at one time instance. The at least one second time instance may include the time instance. In other words, the beam-related information 205 may correspond to a single time instance. In one example, this time instance may be a time instance of the beam measurements, e.g., for the BM-case1. The beam-related information 205 may include beam information indicative of beams among the second set of beams. In some embodiments, when transmitting the beam-related information 205 in the beam report, the UE 104 may report a respective index for each beam among the second set of beams. For example, reporting of the beam information may be implemented by reporting CRI / SSB-RI for each reported beam. Alternatively, when transmitting the beam-related information 205 in the beam report, the UE 104 may report a bitmap corresponding to a set of candidate beams. The set of candidate beams may include the second set of beams. Each bit of the bitmap may indicate whether a respective candidate beam is comprised in the second set of beams. In other words, reporting of the beam information may be implemented by reporting a bitmap for reported beams, where the bitmap corresponds to a large set of beams, e.g., Set A including all beams for beam prediction, and each bit of the bitmap indicates whether the corresponding beam is the reported beam or not.
[0157] In some embodiments, the at least one first time instance or the at least one second time instance may include one or more time instances. In one example, the one or more time instances may be time instance (s) of the beam measurements, e.g., for the BM-case2 based on BS-sided model. In another example, the one or more time instances may be future time instance (s) after the beam measurements, e.g., for the BM-case2 based on UE-sided model. The beam-related information 205 may include beam information indicative of beams among the second set of beams.
[0158] In some embodiments, when transmitting the beam-related information 205 in the beam report, for a time instance of the one or more time instances, the UE 104 may report a respective index for each beam among a subset of beams corresponding to the time instance in the second set of beams. For example, reporting of the beam information may be implemented by reporting CRI / SSB-RI for each reported beam among all reported beams over all reported time instances.
[0159] In some embodiments, when transmitting the beam-related information 205 in the beam report, for a beam among the second set of beams, the UE 104 may report a respective index for the beam and a first time stamp indicator. The first time stamp indicator may be indicative of at least one time instance among the one or more time instances corresponding to the beam. For example, reporting of the beam information may be implemented by reporting CRI / SSB-RI for a set of beams and corresponding time-stamp indicators, where the set of beams includes unique beams of all reported beams over all reported time instances, and each of the time-stamp indicators indicates time stamp (s) of the corresponding beam. For example, the bit value “1” in the time-stamp indicator may indicate that the beam is reported for the corresponding time instance; and the bit value “0” in the time-stamp indicator may indicate that the beam is not reported for the corresponding time instance. In a more specific example, reporting of CRI_1 and “0110” time-stamp indicator indicates that the beam corresponding to CRI_1 is reported and time stamps of the beam corresponding to CRI_1 are the second time instance and the third time instance among four reported time instances.
[0160] FIG. 4A illustrates an example diagram of beam information in accordance with aspects of the present disclosure. In the example in FIG. 4A, the reported beams (i.e., the second set of beams) includes the beams corresponding to CRI_1, CRI_2, CRI_3, …, CRI_N. Four time instances are selected for beam reporting. The time-stamp indicator for the beam corresponding to CRI_1 is “0110” indicating that the beam corresponding to CRI_1 is reported for the second and third time instances. The time-stamp indicator for the beam corresponding to CRI_2 is “0110” indicating that the beam corresponding to CRI_2 is reported for the second and third time instances. The time-stamp indicator for the beam corresponding to CRI_3 is “1010” indicating that the beam corresponding to CRI_3 is reported for the first and third time instances. The time-stamp indicator for the beam corresponding to CRI_N is “0011” indicating that the beam corresponding to CRI_3 is reported for the third and fourth time instances.
[0161] Turning back to FIG. 2, in some embodiments, when transmitting the beam-related information 205 in the beam report, the UE 104 may report a bitmap corresponding to a set of candidate beams and a respective second time stamp indicator for a beam among the second set of beams, the set of candidate beams comprise the second set of beams, a bit of the bitmap indicating whether a respective candidate beam is comprised in the second set of beams, the second time stamp indicator being indicative of at least one time instance among the one or more time instances corresponding to the beam. In other words, reporting of the beam information may be implemented by reporting a bitmap for the unique beams and a corresponding time-stamp indicators for each unique beam. The bitmap corresponds to a large set of beams, e.g., Set A including all beams for beam prediction, and each bit of the bitmap indicates whether the corresponding beam is the unique beam of reported beams or not. For example, the bit value “1” in the bitmap may indicate that the corresponding beam is a unique beam for beam reporting; and the bit value “0” in the bitmap may indicate that the corresponding beam is not a unique beam for beam reporting. In the time-stamp indicator for each unique beam, the bit value “1” may indicate that the beam is reported for the corresponding time instance; and the bit value “0” may indicate that the beam is not reported for the corresponding time instance.
[0162] FIG. 4B illustrates an example diagram of beam information in accordance with aspects of the present disclosure. In the example in FIG. 4B, the bitmap corresponds to a large set of beams comprising 32 beams. Nine bits with a value of “1” indicating that 9 beams, out of the 32 beams, are unique beams for beam reporting. Corresponding time stamp indicators for the 9 unique beams are reported in the beam report. For example, the first unique beam is the fourth beam in the bitmap and the corresponding time-stamp indicator is “0110” indicating that the first unique beam is reported for the second and third time instances.
[0163] Turning back to FIG. 2, in some embodiments, when transmitting the beam-related information 205 in the beam report, for a time instance of the one or more time instances, the UE 104 may report a bitmap corresponding to a set of candidate beams, the set of candidate beams comprise the second set of beams, a bit of the bitmap indicating whether a respective candidate beam is reported for the time instance. In other words, reporting of the beam information may be implemented by reporting a bitmap for all corresponding reported beams for each reported time instance.
[0164] Supposed that the UE 104 reports beam-related information of 4 time instances, and beam-related information of each time instance comprises 4 beam indices (16 beam indices in total) . Each beam index may be a 5-bit CRI. In a first report method, reporting beam indices of each reported time instance requires 5*16=80 bits. In a second report method, beam indices of all unique beams and a corresponding time-stamp indicator for unique beams are reported. In a third report method, a bitmap for the unique beams and corresponding time-stamp indicators for unique beams are reported. A time-stamp indicator is a bitmap that consist of 4 bits mapping to 4 time instances. If the number of unique beams does not exceed 7, the number of reporting bits using the third report method is less than that using the second report method and that using the first report method. If the number of unique beams does not exceed 12, the number of reporting bits using the second report method is less than that using the first report method. The UE 104 may determine the report method of beam information according to the number of unique beams and indicate its selected report method to the base station 102, which can reduce UCI overhead for beam reporting.
[0165] In some embodiments, the beam-related information 205 may include the information of beam quality of the second set of beams, and the UE 104 may quantitate the information of beam quality of the second set of beams.
[0166] In some embodiments, for a time instance among the at least one first time instance or the at least one second time instance, the information of beam quality of the second set of beams may be quantitated based on differential quantization of information of beam quality of the second set of beams of beams among the second set of beams corresponding to the time instance. For example, the RSRP quantization method may be based on the differential quantization of the RSRP information over one time instance. In a more specific example, for each time instance, the largest absolute RSRP value among all reported beams of the time instances may be quantified, and the differences between RSRP values of other reported beams in the time instance and the largest RSRP value are quantified.
[0167] In some embodiments, if the at least one first time instance or the at least one second time instance includes a plurality of time instances, the information of beam quality of the second set of beams may be quantitated based on differential quantization of information of beam quality of the second set of beams of the second set of beams over the plurality of time instances. For example, the RSRP quantization method may be based on the differential quantization of the RSRP information over multiple time instances. In a more specific example, the largest RSRP value among all reported beams over all time instances may be quantified with 7bit, and the differences between other RSRP values of reported beams over all time instances and the largest RSRP may be quantified with 4 bits.
[0168] In some embodiments, if the at least one first time instance or the at least one second time instance includes a plurality of time instances, the information of beam quality of the second set of beams may be quantitated based on differential quantization of information of beam quality of the second set of beams of a same beam between different time instances. For example, the RSRP quantization method may be based on the differential quantization of the RSRP information of the same beam between different time instances. For example, RSRP values of reported beams of one time instance (e.g., an earliest time instance or a last time instance among the reported time instances) may be quantified, and differential RSRP values of the same reported beam of other time instances may be quantified with reference to the RSRP values of the reported beam of the time instance.
[0169] If the beam-related information is reported based on the differential quantization of the RSRP information over one time instance or the differential quantization of the RSRP information of the same beam between different time instances, the beam corresponding to the largest L1-RSRP should be indicated in the beam report. For the differential quantization of the RSRP information over one time instance, the ranking of RSRPs in the beam report may be determined based on the unique beams and the time-stamp indicator of each unique beam.
[0170] In some embodiments, the beam-related information 205 may include the probability information, and the UE 104 may receive, from the base station 102, a configuration of a first mapping relationship between probability values and quantified probability values. The UE 104 may quantitate the probability information based on the first mapping relationship. For example, if the beam-related information 205 includes probability information indicating probability of one or more beams as the best beam, the base station 102 may configure a mapping relationship between the probability and quantified probability values and the UE 104 may report the quantified probability value when reporting the probability information. Table 2 shows an example mapping relationship between probability values and quantified probability values.
[0171] Table 2 Example mapping between probability values and quantified values
[0172] In some embodiments, the beam-related information 205 may include the confidence information, and the UE 104 may receive, from the base station 102, a configuration of a second mapping relationship between confidence values and quantified confidence values. The UE 104 may quantitate the confidence information based on the second mapping relationship. For example, if the beam-related information 205 includes confidence information indicating confidence of one or more RSRP information, the base station 102 may configure a mapping relationship between the confidence and quantified confidence values and the UE 104 may report the quantified confidence value when reporting the confidence information. Table 3 shows an example mapping relationship between confidence values and quantified confidence values.
[0173] Table 3 Example mapping between confidence values and quantified values
[0174] In some implementations, the reported beam-related information 205 may have a variable size, e.g., in the case that the UE 104 selects one among a plurality of configurations for beam reporting, or in the case that the UE 104 determines at least part of the configuration for beam reporting. The beam-related information reporting may be performed in a two-part reporting approach.
[0175] In some embodiments, the beam report may include a first part indicative of at least partial information of the configuration for beam reporting and a second part containing the beam-related information 205. The second part may be determined based on the first part. In some embodiments, the first part may be used to identify the number of bits of information in the second part. Alternatively or additionally, the first part may be used to identify contents in the second part.
[0176] For example, the first part may contain an indication of the partial or all configuration for beam reporting determined by the UE 104. The remaining portion of the configuration for beam reporting configured by the base station 102, if any, does not need to be reported. The second part may contain beam-related information which is decoded by the base station 102 based on the content of the first part. The two parts may be encoded independently.
[0177] In a specific example, the number of reported time instances, N, and the number of reported beams in a time instance, K, may be configured by the base station 102 and, the report method of beam information and RSRP quantization method may be determined by the UE 104 itself, then the UE 104 shall send an indication to indicate its selection. The indication may be reported in the first part and the corresponding beam-related information may be determined based on the content of the first part and reported in the second part.
[0178] An example of the two-part report format is illustrated in Table 4. KSet is the number of all beams for beam prediction, e.g., Set A. In the first part, which report method that the UE applies for beam information and which RSRP quantization method that the UE applies for RSRP information are indicated. The report method of beam information can be indicated implicitly by the number of unique beams. For example, the number of unique beams is less than a predefined value #1, implicitly indicating that the report method is method#2 (e.g., reporting CRI / SSB-RI for a set of beams including unique beams of all reported beams over all reported time instances and corresponding time-stamp indicators for each unique beam) ; otherwise the report method is method#1 (e.g., reporting CRI / SSB-RI for each reported beam among all reported beams over all reported time instances) . If report method#1 of beam information is applied, the field of number of unique beams will be zero padded; if report method#2 of beam information is applied, Log2 [KSet] bits of the field is used to indicate the number of unique beams.
[0179] According to content of the first part, the UE 104 may determine the content of the second part. Specially, if the first part and the second part are reported with different PUCCH transmission or PUSCH transmission, the base station 102 would allocate resources for report of the second part based on the content of the first part.
[0180] In the second part, depending on whether the report method of beam information indicated in the first part is method#1 or method#2, the beam information could be CRI of K beams over N time instances or CRIs of unique beams, which result in different bit-widths. If the method#2 is applied, a CRI corresponding to a beam with the largest RSRP should be reported for differential RSRP report. Depending on the RSRP quantization method indicated in the first part, the RSRP information could be different format as shown in Table 4.
[0181] Table 4 Example of a two-part report format
[0182] In some embodiments, the beam report may include a first part indicative of at least partial information of the configuration for beam reporting and a portion of the beam-related information 205 and a second part containing a remaining portion of the beam-related information 205. The second part may be determined based on the first part. In some embodiments, the first part may be used to identify the number of bits of information in the second part. Alternatively or additionally, the first part may be used to identify contents in the second part. In some embodiments, the at least one first time instance or the at least one second time instance may include one or more time instances. The portion of the beam-related information 205 in the first part may include beam-related information 205 of one time instance among the one or more time instances. Alternatively or additionally, the portion of the beam-related information 205 in the first part may include the number of time instances among the one or more time instances. Alternatively or additionally, the portion of the beam-related information 205 in the first part may include an indication of the time instance. In some embodiments, the time instance may be an earliest time instance (i.e., the first one in chronological order) among the one or more time instances. Alternatively, the time instance may be a last time instance (i.e., the last one in chronological order) among the one or more time instances. Alternatively, the time instance may be a time instance corresponding to a reported beam with a best beam quality over the one or more time instances.
[0183] In a specific example, the number of reported beams in a time instance, K, may be configured by the base station 102 and, the number of reported time instances, N, the report method of beam information and RSRP quantization method may be determined by the UE 104 itself, then the UE 104 shall send an indication to indicate its selection. The indication may be reported in the first part. In addition, the first part may further contain partial beam-related information and indication relevant to remaining beam-related information carried in the second part. For example, the first part shall further contain the beam-related information of the earliest time instance and the number of reported time instances. The second part may contain the beam-related information of other reported time instances.
[0184] An example of the two-part report format is illustrated in Table 5. In the first part, in addition to contents of the first part in the example in Table 4, CRIs of K beams of the earliest time instance and corresponding RSRPs are reported, and the number of reported time instance, N, is reported to indicate that beams of N-1 time instances shall be reported in second part.
[0185] In the second part, beam information of other N-1 time instances has different content depending on the reported method of beam information indicated in the first part. If method#1 is applied, the beam information is CRIs of K beams over N-1 time instances; if method#2, the beam information is CRIs of unique beams other than the K beams reported in the first part. In some implementations, if the beam information over N reported time instance has not changed, i.e., the number of unique beams equals to K, the corresponding second part will not be reported.
[0186] Table 5 Example of a two-part report format
[0187] In some embodiments, the UE 104 may receive, from the base station 102, a beam indication indicative of a plurality of transmission configuration indicator (TCI) states. For example, the base station 102 may indicate N TCI states for N future time instances in one beam indication.
[0188] In some embodiments, the beam indication may include an indication of the plurality of TCI states; and an indication of a time interval between a time point of receiving the beam indication and a starting point for applying a first TCI state among the plurality of TCI states. For example, the base station 102 may indicate N TCI state IDs and a time interval δ between a time point of receiving the indication of the N TCI state IDs and a starting point for applying the first TCI state ID among the N TCI state IDs by a MAC CE. The starting time point t1 to apply the first TCI state ID is determined by the time point t0 when the MAC CE is transmitted and δ.
[0189] In some embodiments, the UE 104 may determine a duration during which a TCI state of the plurality of TCI states applies. In a first implementation, the UE 104 may receive, from the base station 102, an indication of a first time length that the TCI state applies. In other words, the base station 102 may directly indicate the duration of applying the TCI state. For example, the base station 102 may configure a beam dwelling time d by higher layer signaling. The base station 102 may indicate N TCI state IDs and a time interval δ by the MAC CE. The starting time point t1 to apply the first TCI state ID is determined by the time point t0 when the MAC CE is transmitted and δ, and the starting time point t2 to apply second a TCI state ID is determined by the starting time point to apply the first TCI state ID and d, so on. In detail, t1=t0+δ, t2=t1+d, . . . ., tN=t (N-1)+d. The base station 102 may indicate a TCI state of each of N future time instances.
[0190] In a second implementation, the UE 104 may receive an indication of a second time length from the base station 102. Then, the UE 104 may receive a respective time indicator for the TCI state from the base station 102. A respective duration of the TCI state is determined based on the respective time indicator for the TCI state and the second time length. In a specific example, the base station 102 may configure a base beam dwelling time d0 by higher layer signalling. The base station 102 may indicate M (<N) TCI state IDs, a time interval δ by the MAC CE and M beam dwelling time indicators. The starting time point t1 to apply the first TCI state ID is determined by the time point t0 when the MAC CE is transmitted and δ, and the starting time point t2 to apply second a TCI state ID is determined by the starting time point to apply the first TCI state ID, d and the beam dwelling time indicator of the first TCI state ID, so on. A beam dwelling time indicator with a two-bit value of “10” may indicate that an application duration of the corresponding TCI state ID is 2d.
[0191] With some embodiments of the present disclosure, configurations for beam reporting including criteria for beam selection and time instance selection, indication of beam-related information report method for reducing overhead may be determined. Beam-related information report methods including beam information report methods and RSRP quantization methods are designed. A UCI format of a two-part report for variable beam report is designed. In addition, a scheme for beam indication for multiple future time instances is designed. Some embodiments of the present disclosure enable reporting beam-related information over multiple time instances and reduced uplink control (UCI) overhead for beam reporting while reporting a mass of beams.
[0192] FIG. 5 illustrates an example of a device 500 that supports beam reporting in accordance with aspects of the present disclosure. The device 500 may be an example of a UE 104 or a network entity 102 as described herein. The device 500 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 500 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 502, a memory 504, a transceiver 506, and, optionally, an I / O controller 508. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0193] The processor 502, the memory 504, the transceiver 506, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 502, the memory 504, the transceiver 506, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0194] In some implementations, the processor 502, the memory 504, the transceiver 506, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 502 and the memory 504 coupled with the processor 502 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 502, instructions stored in the memory 504) .
[0195] In an example in which the device 500 is implemented as a UE 104, the processor 502 may support wireless communication at the device 500 in accordance with examples as disclosed herein. The processor 502 may be configured to operable to support a means for performing beam measurements on a first set of beams; and a means for transmitting, to a network device, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting, wherein the second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements.
[0196] In an example in which the device 500 is implemented as a network entity 102, the processor 502 may support wireless communication at the device 500 in accordance with examples as disclosed herein. The processor 502 may be configured to operable to support a means for transmitting, to a UE, reference signals on a first set of beams for beam measurements; and a means for receiving, from the UE, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting, wherein the second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements.
[0197] The processor 502 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 502 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 502. The processor 502 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 504) to cause the device 500 to perform various functions of the present disclosure such that the device 500 may perform any process of the disclosure as discussed with reference to FIGS. 2 to 10C.
[0198] The memory 504 may include random access memory (RAM) and read-only memory (ROM) . The memory 504 may store computer-readable, computer-executable code including instructions that, when executed by the processor 502 cause the device 500 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 502 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 504 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0199] The I / O controller 508 may manage input and output signals for the device 500. The I / O controller 508 may also manage peripherals not integrated into the device M02. In some implementations, the I / O controller 508 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 508 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 508 may be implemented as part of a processor, such as the processor 506. In some implementations, a user may interact with the device 500 via the I / O controller 508 or via hardware components controlled by the I / O controller 508.
[0200] In some implementations, the device 500 may include a single antenna 510. However, in some other implementations, the device 500 may have more than one antenna 510 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 506 may communicate bi-directionally, via the one or more antennas 510, wired, or wireless links as described herein. For example, the transceiver 506 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 506 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 510 for transmission, and to demodulate packets received from the one or more antennas 510. The transceiver 506 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0201] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 510 for transmitting the amplified signal into the air or wireless medium.
[0202] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 510 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0203] FIG. 6 illustrates an example of a processor 600 that supports beam reporting in accordance with aspects of the present disclosure. The processor 600 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 600 may be implemented in a device or its components as described herein. For example, the device may be an example of a UE 104 or a network entity 102 as described herein. The processor 600 may include a controller 602 configured to perform various operations in accordance with examples as described herein. The processor 600 may optionally include at least one memory 604, such as L1 / L2 / L3 cache. Additionally, or alternatively, the processor 600 may optionally include one or more arithmetic-logic units (ALUs) 600. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0204] The processor 600 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 600) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0205] The controller 602 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. For example, the controller 602 may operate as a control unit of the processor 600, generating control signals that manage the operation of various components of the processor 600. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0206] The controller 602 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 604 and determine subsequent instruction (s) to be executed to cause the processor 600 to support various operations in accordance with examples as described herein. The controller 602 may be configured to track memory address of instructions associated with the memory 604. The controller 602 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 602 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 602 may be configured to manage flow of data within the processor 600. The controller 602 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 600.
[0207] The memory 604 may include one or more caches (e.g., memory local to or included in the processor 600 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 604 may reside within or on a processor chipset (e.g., local to the processor 600) . In some other implementations, the memory 604 may reside external to the processor chipset (e.g., remote to the processor 600) .
[0208] The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 600, cause the processor 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 602 and / or the processor 600 may be configured to execute computer-readable instructions stored in the memory 604 to cause the processor 600 to perform various functions. For example, the processor 600 and / or the controller 602 may be coupled with or to the memory 604, and the processor 600, the controller 602, and the memory 604 may be configured to perform various functions described herein. In some examples, the processor 600 may include multiple processors and the memory 604 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0209] The one or more ALUs 606 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 606 may reside within or on a processor chipset (e.g., the processor 600) . In some other implementations, the one or more ALUs 606 may reside external to the processor chipset (e.g., the processor 600) . One or more ALUs 606 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 606 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 606 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 606 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 606 to handle conditional operations, comparisons, and bitwise operations.
[0210] The processor 600 may support wireless communication in accordance with examples as disclosed herein. In an example in which the device 500 is implemented as a UE 104, the processor 600 may be configured to or operable to support a means for performing beam measurements on a first set of beams; and a means for transmitting, to a network device, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting, wherein the second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements.
[0211] In an example in which the device 500 is implemented as a network entity 102, the processor 600 may be configured to or operable to support a means for transmitting, to a UE, reference signals on a first set of beams for beam measurements; and a means for receiving, from the UE, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting, wherein the second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements.
[0212] FIG. 7 illustrates a flowchart of a method 700 that supports beam reporting in accordance with aspects of the present disclosure. The operations of the method 700 may be implemented by a device or its components as described herein. For example, the operations of the method 700 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0213] At 705, the method may include performing beam measurements on a first set of beams. The operations of 705 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 705 may be performed by a device as described with reference to FIG. 1.
[0214] At 710, the method may include transmitting, to the base station, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting, wherein the second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements. The operations of 710 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 710 may be performed by a device as described with reference to FIG. 1.
[0215] FIG. 800 illustrates a flowchart of a method 800 that supports beam reporting in accordance with aspects of the present disclosure. The operations of the method 800 may be implemented by a device or its components as described herein. For example, the operations of the method 800 may be performed by a network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0216] At 805, the method may include transmitting, to a UE, reference signals on a first set of beams for beam measurements. The operations of 805 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 805 may be performed by a device as described with reference to FIG. 1.
[0217] At 810, the method may include receiving, from the UE, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting, wherein the second set of beams corresponds to one of the following: at least one first time instance after the beam measurements; or at least one second time instance of the beam measurements. The operations of 810 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 810 may be performed by a device as described with reference to FIG. 1.
[0218] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0219] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0220] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0221] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0222] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0223] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) , comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:perform beam measurements on a first set of beams; andtransmit, to a network device via the transceiver, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting,wherein the second set of beams corresponds to one of the following:at least one first time instance after the beam measurements; orat least one second time instance of the beam measurements.2.The UE of claim 1, wherein the beam-related information comprises at least one of the following:beam information indicative of beams among the second set of beams;information of beam quality of the second set of beams;probability information indicative of respective probabilities of beams among the second set of beams as a best beam for the UE; orconfidence information indicative of respective confidences of the information of beam quality of the second set of beams.3.The UE of claim 1, wherein the configuration for beam reporting comprises at least one of the following:a number of reported beams for a same time instance;a maximum number of reported beams for a same time instance;a minimum number of reported beams for a same time instance;a first threshold of beam quality for beam reporting;a beam quality quantization method for beam reporting;an indication of reporting a type of beam quality for beam reporting;a type of beam quality for beam reporting;an indication of reporting a probability that a reported beam is a best beam for the UE;a second threshold of a probability that a reported beam is a best beam for the UE;a third threshold of a confidence of a beam quality of a reported beam;a fourth threshold for determining the at least one first time instance; oran indication of a report method for beam information.4.The UE of claim 3, wherein the processor is further configured to:determine the second set of beams based on the beam measurements, wherein at least one of the following:a difference between a beam quality of a beam among the second set of beams and a best beam quality among the beam qualities of the second set of beams is no greater than the first threshold;a probability that a beam among the second set of beams is a best beam for the UE is greater than the second threshold; ora confidence of a beam quality of a beam among the second set of beams is greater than the third threshold.5.The UE of claim 1, wherein the first set of beams comprises the second set of beams.6.The UE of claim 1 or 3, wherein the configuration for beam reporting comprises at least one of the following:a number of reported time instances;a maximum number of reported time instances;a minimum number of reported time instances;a time interval between a reference point associated with the beam report and a time instance, among time instances corresponding to reported beams, most recent to the reference point; ora time interval between two adjacent time instances corresponding to reported beams.7.The UE of any of claims 3 or 6, wherein the processor is further configured to:determine the at least one first time instance at least based on the beam measurements and the fourth threshold; anddetermine the second set of beams corresponding to the at least one first time instance based on the beam measurements and at least one of the first, second or third threshold.8.The UE of claim 1, wherein the processor is further configured to:receive, from the network device via the transceiver, the configuration for beam reporting.9.The UE of claim 1, wherein the processor is further configured to:receive, from the network device via the transceiver, at least one configuration for beam reporting, wherein the at least one configuration for beam reporting comprise the configuration for beam reporting; andreceive, from the network device via the transceiver, an indication of the configuration for beam reporting.10.The UE of claim 1, wherein the processor is further configured to:receive, from the network device via the transceiver, a portion of the configuration for beam reporting; anddetermine a remaining portion of the configuration for beam reporting;wherein the beam report comprises an indication of the remaining portion of the configuration for beam reporting.11.The UE of claim 1, wherein the beam measurements are performed at one time instance, the at least one second time instance comprises the time instance, the beam-related information comprises beam information indicative of beams among the second set of beams, and transmitting the beam-related information in the beam report comprises one of the following:reporting a respective index for each beam among the second set of beams; orreporting a bitmap corresponding to a set of candidate beams, the set of candidate beams comprise the second set of beams, each bit of the bitmap being indicative of whether a respective candidate beam is comprised in the second set of beams.12.The UE of claim 1, wherein the at least one first time instance or the at least one second time instance comprises one or more time instances, the beam-related information comprises beam information indicative of beams among the second set of beams, and transmitting the beam-related information in the beam report comprises one of the following:for a time instance of the one or more time instances, reporting a respective index for each beam among a subset of beams corresponding to the time instance in the second set of beams;for a beam among the second set of beams, reporting a respective index for the beam and a first time stamp indicator, the first time stamp indicator being indicative of at least one time instance among the one or more time instances corresponding to the beam;reporting a bitmap corresponding to a set of candidate beams and a respective second time stamp indicator for a beam among the second set of beams, the set of candidate beams comprise the second set of beams, a bit of the bitmap indicative of whether a respective candidate beam is comprised in the second set of beams, the second time stamp indicator being indicative of at least one time instance among the one or more time instances corresponding to the beam; orfor a time instance of the one or more time instances, reporting a bitmap corresponding to a set of candidate beams, the set of candidate beams comprise the second set of beams, a bit of the bitmap indicative of whether a respective candidate beam is reported for the time instance.13.The UE of claim 2, wherein the beam-related information comprises the probability information, and the processor is further configured to:receive, from the network device via the transceiver, a configuration of a first mapping relationship between probability values and quantified probability values; andquantitate the probability information based on the first mapping relationship.14.The UE of claim 2, wherein the beam-related information comprises the confidence information, and the processor is further configured to:receive, from the network device via the transceiver, a configuration of a second mapping relationship between confidence values and quantified confidence values; andquantitate the confidence information based on the second mapping relationship.15.The UE of claim 1, wherein the beam report comprises:a first part indicative of at least partial information of the configuration for beam reporting; anda second part containing the beam-related information, wherein the second part is determined based on the first part.16.The UE of claim 1, wherein the beam report comprises:a first part indicative of at least partial information of the configuration for beam reporting and a portion of the beam-related information; anda second part containing a remaining portion of the beam-related information, wherein the second part is determined based on the first part.17.The UE of claim 1, wherein the processor is further configured to:receive, from the network device via the transceiver, a beam indication indicative of a plurality of transmission configuration indicator (TCI) states.18.A network device, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:transmit, to a user equipment (UE) via the transceiver, reference signals on a first set of beams for beam measurements; andreceive, from the UE via the transceiver, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting,wherein the second set of beams corresponds to one of the following:at least one first time instance after the beam measurements; orat least one second time instance of the beam measurements.19.A method performed by a user equipment, comprising:performing beam measurements on a first set of beams; andtransmitting, to a network device, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting,wherein the second set of beams corresponds to one of the following:at least one first time instance after the beam measurements; orat least one second time instance of the beam measurements.20.A processor for wireless communication, comprising:at least one memory; anda controller coupled with the at least one memory and configured to cause the processor to:perform beam measurements on a first set of beams; andtransmit, to a network device via the transceiver, beam-related information of a second set of beams in a beam report, wherein the beam-related information is determined based on the beam measurements and a configuration for beam reporting,wherein the second set of beams corresponds to one of the following:at least one first time instance after the beam measurements; orat least one second time instance of the beam measurements.
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