EP-4736340-A2 - CONFIGURATION OF A REDUCED NUMBER OF TCI STATES IN RESPONSE TO BEAM FAILURE OVER A RANGE OF DIRECTIONS

Abstract

Certain aspects of the present disclosure provide techniques for improving beam management. An example method includes receiving, from a network entity, configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity, detecting a change in an operation mode of the UE from a first operation mode to a second operation mode, and transmitting, based on the detected change in the operation mode of the UE, information to the network entity indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states.

Inventors

• RAGHAVAN, VASANTHAN

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260506

Application Date

20240606

Claims (20)

1. 1. A method for wireless communication by a user equipment (UE), comprising: receiving, from a network entity, configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity; detecting a change in an operation mode of the UE from a first operation mode to a second operation mode; and transmitting, based on the detected change in the operation mode of the UE, information to the network entity indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states.
2. 2. The method of claim 1, wherein each TCI state in the configured set of TCI states is associated with a respective beam pair between the UE and the network entity comprising a communication beam of the UE and communication beam of the network entity.
3. 3. The method of claim 1, further comprising transmitting a channel state information (CSI) report to the network entity associated with the reduced second number of TCI sates.
4. 4. The method of claim 3, further comprising performing signal strength measurements only for communication beams associated with TCI states in the reduced second number of TCI states.
5. 5. The method of claim 4, wherein: each TCI state in the configured set of TCI states is associated with a respective synchronization signal block resource indicator (SSBRI); and the CSI report includes: the respective SSBRI only for each TCI state in the reduced second number of TCI sates; and the signal strength measurements only for the communication beams associated with TCI states in the reduced second number of TCI states.
6. 6. The method of claim 3, further comprising, when generating the CSI report, giving preference to beam candidates associated with TCI states in a non-configured set of TCI states that do not experience a performance loss greater than a threshold performance due to the change in operation mode of the UE over TCI states in the configured set of TCI states that do experience a performance loss greater than the threshold performance due to the change in operation mode of the UE.
7. 7. The method of claim 1, wherein: the information indicates which TCI states of the configured set of TCI states are included within the reduced second number of TCI states that the UE will monitor and report on for the second operation mode; the method further comprises receiving information, from the network entity, indicating a number of operation modes and a list of types of operation modes for which the UE is permitted to monitor and report on the reduced second number of TCI states; and the TCI states included within the reduced second number of TCI states are different for different types of operation modes of the UE.
8. 8. The method of claim 1, wherein the information indicating the UE will monitor and report on the reduced second number of TCI states comprises information indicating the change in the operation mode of the UE.
9. 9. The method of claim 1, wherein the information indicating the UE will monitor and report on the reduced second number of TCI states comprises information indicating which TCI states of the configured set of TCI states experience one of: a performance loss greater than a first performance threshold when changing from the first operation mode to the second operation mode; or a performance loss less than a second performance threshold when changing from the first operation mode to the second operation mode.
10. 10. The method of claim 9, further comprising receiving an indication of the first performance threshold or second performance threshold from the network entity.
11. 11. The method of claim 1, wherein the change in the operation mode of the UE is based on at least one of a change in form factor of the UE or an antenna module of the UE being blocked.
12. 12. The method of claim 1, further comprising receiving, from the network entity, an indication to switch to a communication beam associated with a TCI state in the reduced second number of TCI states.
13. 13. The method of claim 1, further comprising receiving, based on the information indicating the UE will monitor and report on the reduced second number of TCI states, an indication to perform beam training to determine additional TCI states and associated beam pairs to communicate with the network entity.
14. 14. The method of claim 1, further comprising receiving, from the network entity, an acknowledgement message, acknowledging the information indicating the UE will monitor and report on the reduced second number of TCI states.
15. 15. A method for wireless communication by a network entity, comprising: transmitting, to a user equipment (UE), configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity; and receiving information, from the UE, indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states.
16. 16. The method of claim 15, wherein the information indicating the UE will monitor and report on the reduced second number of TCI states is based on a change in an operation mode of the UE.
17. 17. The method of claim 16, wherein the change in the operation mode of the UE is based on at least one of a change in form factor of the UE or an antenna module of the UE being blocked.
18. 18. The method of claim 15, wherein each TCI state in the configured set of TCI states is associated with a respective beam pair between the UE and the network entity comprising a communication beam of the UE and communication beam of the network entity.
19. 19. The method of claim 15, further comprising receiving a channel state information (CSI) report from the UE associated with the reduced second number of TCI sates.
20. 20. The method of claim 19, wherein: each TCI state in the configured set of TCI states is associated with a respective synchronization signal block resource indicator (SSBRI); and the CSI report includes: the respective SSBRI only for each TCI state in the reduced second number of TCI sates; and signal strength measurements only for communication beams associated with TCI states in the reduced second number of TCI states.

Description

CONFIGURATION OF A REDUCED NUMBER OF TCI STATES IN RESPONSE TO BEAM FAILURE OVER A RANGE OF DIRECTIONS CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims priority to U.S. Patent Application No. 18/344,234, filed June 29, 2023, which is assigned to the assignee hereof and hereby expressly incorporated by reference in its entirety as if fully set forth below and for all applicable purposes. BACKGROUND Field of the Disclosure [0002] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for configuring a reduced number of TCI states in response to a beam failure over a range of directions. Description of Related Art [0003] Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users [0004] Although wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and/or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others. SUMMARY [0005] One aspect provides a method for wireless communication by a user equipment (UE). The method includes receiving, from a network entity, configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity; detecting a change in an operation mode of the UE from a first operation mode to a second operation mode; and transmitting, based on the detected change in the operation mode of the UE, information to the network entity indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states. [0006] Another aspect provides a method for wireless communication by a network entity. The method includes transmitting, to a user equipment (UE), configuration information configuring the UE with a set of transmission configuration indicator (TCI) states, wherein the configured set of TCI states comprises a first number of TCI states for use in communicating with the network entity; and receiving information, from the UE, indicating the UE will monitor and report on a reduced second number of TCI states of the configured set of TCI states relative to the first number of TCI states. [0007] Other aspects provide: an apparatus operable, configured, or otherwise adapted to perform any one or more of the aforementioned methods and/or those described elsewhere herein; a non-transitory, computer-readable media comprising instructions that, when executed by a processor of an apparatus, cause the apparatus to perform the aforementioned methods as well as those described elsewhere herein; a computer program product embodied on a computer-readable storage medium comprising code for performing the aforementioned methods as well as those described elsewhere herein; and/or an apparatus comprising means for performing the aforementioned methods as well as those described elsewhere herein. By way of example, an apparatus may comprise a processing system, a device with a processing system, or processing systems cooperating over one or more networks. [0008] The following description and the appended figures set forth certain features for purposes of illustration. BRIEF DESCRIPTION OF DRAWINGS [0009] The appended figures depict certain features of the various aspects described herein and are not to be considered limiting of the scope of this disclosure. [0010] FIG. 1 depicts an example wireless communications network. [0011] FIG. 2 depicts an example disaggregated base station arch