CN-116648961-B - Blind decoding restriction techniques for wireless communications

Abstract

Methods, systems, and devices supporting blind decoding restriction adjustment techniques for wireless communications are described. The base station may configure a User Equipment (UE) with one or more conditions that may trigger an adjustment to a number of blind decoding candidates to be monitored at the UE for control information communication from the base station. The nominal number of blind decoding candidates may be configured at the UE, and the adjustment to the number of blind decoding candidates may reduce the number of blind decoding candidates from the nominal number, allowing the UE to perform blind decoding using less processing power, less time, or both. The trigger conditions may include conditions of one or more configurations that may support reliable communications with fewer blind decoding candidates.

Inventors

• REN YUWEI
• 1. I. shahenini
• XU HUILIN
• LUO TAO

Assignees

• 高通股份有限公司

Dates

Publication Date

20260505

Application Date

20210112

Claims (20)

1. 1. A method for wireless communication at a User Equipment (UE), comprising: transmitting an indication to a base station that blind decoding restriction adjustment is supported at the UE; Receiving, from the base station, a trigger condition for adjusting a first blind decoding limit from a first blind decoding candidate number to be monitored for control channel communications from the base station to a second blind decoding candidate number to be monitored from the control channel communications; detecting that the trigger condition is met at the UE, and Based at least in part on the detecting, adjusting a number of blind decoding candidates to be monitored for the control channel communication from the first number of blind decoding candidates to the second number of blind decoding candidates; Wherein the receiving comprises receiving a first trigger condition associated with a first Transmission Configuration Indicator (TCI) state, and wherein the first trigger condition is detected based at least in part on an indication that the UE is to use the first TCI state for communication with the base station, and Wherein the first trigger condition is configured at the UE in Radio Resource Control (RRC) signaling, indicated to the UE in a Downlink Control Information (DCI) transmission, or any combination thereof.
2. 2. The method of claim 1, wherein the receiving comprises: A first trigger condition associated with a first bandwidth portion (BWP) is received, and wherein the first trigger condition is detected based at least in part on an indication that the UE is to use the first BWP for communication with the base station.
3. 3. The method of claim 2, wherein the first trigger condition is configured at the UE in Radio Resource Control (RRC) signaling that configures a plurality of different BWP for communication between the UE and the base station.
4. 4. The method of claim 2, wherein the first trigger condition is indicated in control channel information associated with a BWP switch to the first BWP, and wherein the first trigger condition is provided in a same control channel information transmission indicating the BWP switch to the first BWP, in a different control channel information transmission, or in any combination thereof.
5. 5. The method of claim 1, wherein the receiving comprises: A first trigger condition associated with a first portion of a periodic pattern and a second trigger condition associated with a second portion of the periodic pattern are received, and wherein the first trigger condition or the second trigger condition is detected based at least in part on a location of a transmission slot within the periodic pattern.
6. 6. The method of claim 5, wherein the periodic mode is configured by Radio Resource Control (RRC) signaling and is activated or deactivated by Downlink Control Information (DCI).
7. 7. The method of claim 1, wherein the receiving comprises: a first trigger condition associated with a first type of control resource set (CORESET) is received, Wherein the first trigger condition is detected based at least in part on an indication that the UE is to monitor the first type CORESET for control information from the base station, and Wherein the first type CORESET is dynamic CORESET or UE requested CORESET.
8. 8. The method of claim 1, wherein the receiving comprises: A first trigger condition associated with a set of time slots is received, control information configured to be provided in the set of time slots in a resource of a shared channel, and wherein the first trigger condition is detected based at least in part on whether a time slot to be monitored is within the set of time slots.
9. 9. The method of claim 8, wherein the indication of whether a time slot is included in the set of time slots is provided in Downlink Control Information (DCI) from the base station, in Radio Resource Control (RRC) signaling from the base station, or in any combination thereof.
10. 10. The method of claim 1, wherein the indication that blind decoding restriction adjustment is supported at the UE is provided in a capability indication sent to the base station, and wherein the capability indication comprises one or more conditions capable of triggering blind decoding restriction adjustment at the UE, an indication of a UE type, or any combination thereof.
11. 11. The method of claim 1, wherein the receiving comprises: receiving two or more trigger conditions associated with corresponding two or more parameters associated with the communication of the base station, and Wherein the first blind decoding limit is maintained based at least in part on a first combination of the two or more trigger conditions and a second blind decoding limit is selected based at least in part on a second combination of the two or more trigger conditions.
12. 12. The method of claim 1, wherein the trigger condition for adjusting the first blind decoding limit is received jointly in a conditional configuration, in downlink control information, in a Medium Access Control (MAC) control element, in radio resource control signaling, or in any combination thereof.
13. 13. A method for wireless communication at a base station, comprising: Receiving, from a User Equipment (UE), an indication that blind decoding restriction adjustment is supported at the UE; determining one or more trigger conditions for adjusting at least a first blind decoding limit indicating a number of blind decoding candidates to be monitored at the UE for control channel communications from the base station; transmitting the one or more trigger conditions to the UE, the one or more trigger conditions including at least a first trigger condition for adjusting the first blind decoding limit from a first blind decoding candidate number to a second blind decoding candidate number, and Selecting control channel resources for the control channel communication to the UE from the first blind decoding candidate number or from the second blind decoding candidate number based at least in part on whether the first trigger condition is satisfied; Wherein the first trigger condition is associated with a first Transmission Configuration Indicator (TCI) state, and wherein the first trigger condition is satisfied based at least in part on an indication that the UE is to use the first TCI state for communication with the base station, and Wherein the first trigger condition is configured at the UE in Radio Resource Control (RRC) signaling, indicated to the UE in a Downlink Control Information (DCI) transmission, or any combination thereof.
14. 14. The method of claim 13, wherein the first trigger condition is associated with a first bandwidth portion (BWP), and wherein the first trigger condition is satisfied based at least in part on an indication that the UE is to use the first BWP for communication with the base station.
15. 15. The method of claim 14, wherein the first trigger condition is indicated in a control channel information transmission associated with a BWP switch to the first BWP, and wherein the first trigger condition is provided in a same control channel information transmission indicating the BWP switch to the first BWP, in a different control channel information transmission, or any combination thereof.
16. 16. The method of claim 13, wherein the first trigger condition is associated with a first portion of a periodic pattern and a second trigger condition is associated with a second portion of the periodic pattern, and wherein the first trigger condition or the second trigger condition is satisfied based at least in part on a location of a transmission slot within the periodic pattern.
17. 17. The method according to claim 13, wherein: The first trigger condition is associated with a first type of control resource set (CORESET), wherein the first trigger condition is satisfied based at least in part on an indication that the UE is to monitor the first type of CORESET for control information from the base station, and Wherein the first type CORESET is dynamic CORESET or UE requested CORESET.
18. 18. The method of claim 13, wherein the first trigger condition is associated with a set of time slots in which control information is configured to be provided in resources of a shared channel, and wherein the first trigger condition is satisfied based at least in part on whether a time slot to be monitored is within the set of time slots.
19. 19. The method of claim 13, wherein the indication that blind decoding restriction adjustment is supported at the UE is provided in a capability indication received from the UE, and wherein the capability indication comprises one or more parameters capable of triggering blind decoding restriction adjustment at the UE, an indication of a UE type, or any combination thereof.
20. 20. The method according to claim 13, wherein: two or more trigger conditions are associated with corresponding two or more parameters associated with communication of the base station, and Wherein the first blind decoding limit is maintained based at least in part on a first combination of the two or more trigger conditions and a second blind decoding limit is selected based at least in part on a second combination of the two or more trigger conditions.

Description

Blind decoding restriction techniques for wireless communications Technical Field The following relates to wireless communications, including blind decoding restriction techniques for wireless communications. Background Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of these multiple access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems or LTE-a Pro systems, and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), or discrete fourier transform spread-spectrum orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations, or one or more network access nodes, each supporting communication for multiple communication devices, which may be otherwise referred to as User Equipment (UE). In some wireless systems, a base station may transmit control information to a UE using a downlink control channel (e.g., a Physical Downlink Control Channel (PDCCH)). In some cases, the UE may monitor several resources within the downlink control channel based on one or more search spaces configured at the UE. In such a case, each UE may perform blind decoding on a plurality of possible downlink resources that may contain control information for the UE according to the configured search space. The UE may decode and process the control information if the UE detects control information indicating an identity of the UE (e.g., scrambled by a Radio Network Temporary Identity (RNTI) of the UE based on the downlink communication). Such blind decoding may consume a relatively large amount of processing resources and processing power at the UE, and thus efficient techniques for blind decoding may help to improve UE efficiency and reduce power consumption. Disclosure of Invention The described technology relates to improved methods, systems, devices, and apparatus supporting blind decoding restriction techniques for wireless communications. In various aspects, a User Equipment (UE) may receive configuration information from a base station, the configuration information providing one or more conditions that may trigger an adjustment to a number of blind decoding candidates to be monitored for control information at the UE. In some cases, the UE may provide a capability indication to the base station that identifies the UE as being able to perform adjustments to the blind decoding restriction, and the base station may determine one or more trigger conditions that may trigger adjustments to the number of blind decoding candidates at the UE. In some cases, a nominal number of blind decoding candidates may be configured at the UE, and the adjustment to the number of blind decoding candidates may reduce the number of blind decoding candidates from the nominal number, allowing the UE to perform blind decoding using less processing power, less time, or both. In other cases, the adjustment may increase the number of blind decoding candidates from the nominal number, which may allow additional UEs to receive control information from the base station for a period of time as compared to the nominal number. In some cases, the trigger conditions may include one or more of a change in bandwidth portion (BWP) at the UE, a change in beam at the UE, a periodic set of slots, a monitored set of control resources (CORESET) (e.g., dynamic or UE requested CORESET may have reduced blind decoding candidates), the presence of control channel information transmitted using downlink shared channel resources (e.g., piggybacked DCI), or any combination thereof. In some cases, the adjustment of the blind decoding limit may be configured by Radio Resource Control (RRC) signaling, may be indicated in Downlink Control Information (DCI) to the UE, may be indicated in a Medium Access Control (MAC) Control Element (CE), or any combination thereof. A method for wireless communication at a User Equipment (UE) is described. The method may include transmitting an indication to a base station that adjustment of a blind decoding restriction is supported at the UE, receiving a trigger condition from the base station to adjust a first blind decoding restriction from a first blind decoding candidate number to be monitored for control channel communications from the base station to a second blind decoding candidate number to be monitored for the control channel communications, detecting that the trigger condition is