UE Group Beam Management via Leader-Based Beam Sweeping
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Solution Overview
Problem
Current beam management procedures in wireless communications systems increase latency and power consumption, especially for groups of user equipment (UEs) that are quasi co-located and moving at high speeds, as each UE performs individual beam sweeping procedures.
Innovation Solution
A group leader UE performs beam management on behalf of the group, conducting beam sweeping and reporting results to the network entity, which then communicates beam configurations to all group members via sidelink, reducing the need for individual UE efforts and minimizing latency and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each UE performs individual beam sweeping procedures, then beam management accuracy is improved, but latency and power consumption increase
Solution Approach 1:
The patent merges beam management operations by allowing a group leader UE to perform beam sweeping on behalf of multiple group member UEs. The group leader conducts a single beam sweeping procedure that serves the entire group, eliminating the need for each UE to perform separate beam management, thus reducing latency while maintaining beam management accuracy through the group leader's representative measurements
Solution Approach 2:
The group leader UE acts as an intermediary between the network entity and group member UEs for beam management functions. The group leader performs beam sweeping, reports results to the network, and relays beam configuration information to group members, thereby reducing the communication overhead and latency that would result from each UE independently interacting with the network
2Measurement precision
If each UE performs individual beam sweeping procedures, then beam management accuracy is improved, but power consumption increases
Solution Approach 1:
The patent combines beam management operations for multiple UEs into a single operation performed by the group leader. By merging the beam sweeping procedures, the total power consumption is significantly reduced since only one UE (the group leader) needs to activate its beam sweeping functionality, while group members can remain in lower power states
Solution Approach 2:
The group leader UE provides beam management services to group member UEs, allowing members to rely on the group leader's measurements and reports rather than performing their own beam sweeping. This self-service model within the group reduces the energy burden on individual UEs while maintaining accurate beam management through the group leader's representative actions
3Loss of time
If a group leader performs centralized beam management, then latency and power consumption are reduced, but device complexity increases
Solution Approach 1:
The patent segments beam management functionality by separating the roles of group leader and group member UEs. The group leader is assigned specific beam management responsibilities (performing sweeping, reporting, receiving configurations), while group members have simplified roles (receiving and applying beam configurations). This segmentation reduces overall system complexity by creating clear role divisions rather than requiring complex coordination among all UEs
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. In some examples, a user equipment (UE) may transmit, to a network entity, signaling including an indication of a group configuration for a UE group. The group configuration may include a group leader UE, one or more group member UEs, and an identifier mapping between the group leader UE and the one or more group member UEs. The group member UEs may be within a quasi co-location threshold of the group leader UE. The UE may perform a beam management procedure to measure multiple transmit beams and identify a transmit beam for communications between the network entity and the UE group. The UE may transmit the message indicating the transmit beam to the network entity. The methods, systems, and devices described herein may reduce beam management efforts for group member UEs, thus reducing power consumption and latency in beam management procedures.