Coordinated Relay Beam Training Overhead Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently coordinating beam training for relayed communications, leading to increased processing and signaling overhead, which can negatively impact network performance.
Innovation Solution
A method and apparatus for wireless communication that involve a receiving user equipment (UE) receiving beamformed reference signals from multiple relay UEs and selecting a reference signal index based on measurement criteria, which is then used to determine optimal beam parameters for coordinated relaying, thereby facilitating efficient beam training and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam training is performed for coordinated relaying in current wireless communication systems, then beam selection can be achieved, but processing overhead and signaling overhead increase
Solution Approach 1:
The beam training procedure is segmented into distinct phases: relay UEs first transmit beamformed reference signals, then the receiving UE performs measurements and selects beams, and finally beam indication is provided. This segmentation allows the receiving UE to process measurements independently without requiring complex coordinated processing across all UEs, reducing overall processing overhead while maintaining beam selection accuracy.
Solution Approach 2:
Beamformed reference signals serve as an intermediary mechanism that enables the receiving UE to assess beam quality from multiple relay UEs without direct complex coordination between relays. The reference signals carry the necessary measurement information, allowing the receiving UE to perform autonomous beam selection based on measurement criteria, thereby reducing signaling overhead between network entities.
2Reliability
If multiple relay UEs transmit beamformed reference signals for beam training, then optimal beam selection is improved, but signaling overhead increases
Solution Approach 1:
Relay UEs transmit beamformed reference signals in advance of actual data transmission during a dedicated beam training phase. This preliminary action allows the receiving UE to pre-determine optimal beams based on measurement criteria, so that when actual communication occurs, the beam selection is already established without requiring additional signaling overhead during data transmission.
Solution Approach 2:
The receiving UE autonomously performs measurements on the beamformed reference signals from multiple relay UEs and independently selects beams based on predefined measurement criteria. This self-service approach eliminates the need for the network to process and coordinate beam selection decisions centrally, significantly reducing signaling overhead while maintaining reliable beam selection for improved communication reliability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving wireless communication device may receive, from a plurality of relay user equipment (UEs), a plurality of beamformed reference signals associated with a set of time resources for beam training for coordinated relaying. The UE may transmit an indication of a reference signal index that indicates a selected beam based at least in part on a determination that at least one measurement associated with the plurality of beamformed reference signals satisfies one or more measurement criteria. Numerous other aspects are described.