Group-Based Beam Reporting for Multi-TRP Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in multi-TRP operation due to limitations in beam reporting mechanisms, particularly in FR2, where simultaneous beam reception is not effectively managed, leading to inefficient data transmission and coordination between TRPs.
Innovation Solution
The implementation of group-based beam reporting, which allows user equipment to determine and report beams associated with multiple TRPs using spatial filters and higher layer indices, enabling efficient simultaneous beam reception and transmission configuration adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If group-based beam reporting is implemented for multi-TRP operation, then beam reporting accuracy and reliability are improved, but device complexity and coordination overhead increase
Solution Approach 1:
The beam reporting process is segmented into group-based reporting units where beams are organized into groups associated with specific TRPs. Each group can be reported independently, allowing the system to manage multi-TRP operations through modular group reporting rather than handling all beams individually, thus improving reliability while managing complexity.
Solution Approach 2:
Beam groups are pre-configured and associated with specific TRPs before actual beam reporting occurs. This preliminary organization of beams into groups with designated TRP associations enables the network to efficiently manage multi-TRP operations without requiring complex real-time coordination decisions, thereby improving reliability while reducing operational complexity.
2Productivity
If simultaneous beam reception from multiple TRPs is enabled, then data transmission efficiency is improved, but feedback overhead and measurement complexity increase
Solution Approach 1:
Multiple beams from different TRPs are merged into group-based reporting structures where beams sharing common characteristics (such as being associated with the same TRP or having similar spatial properties) are combined into single reportable groups. This merging reduces the total number of individual beam reports required, thereby reducing feedback overhead while maintaining the ability to efficiently manage simultaneous beam reception for improved data transmission.
3Measurement precision
If group-based beam reporting is implemented, then beam identification accuracy is improved, but measurement and reporting complexity increase
Solution Approach 1:
Different reporting strategies and measurement approaches are applied to different beam groups based on their specific characteristics and associations with particular TRPs. This localized approach allows the system to optimize measurement precision for each group while adapting the reporting complexity to match the specific requirements of each beam group, thereby improving overall beam identification accuracy without uniformly increasing complexity across all beams.
Data Source
AI summary
There is provided an apparatus, said apparatus comprising means for receiving, at a user equipment from a network, a configuration that enables group-based beam reporting, receiving an indication that the group-based beam reporting is associated with a first transmit receive point, TRP, or a group of TRPs, the group of TRPs comprising at least the first TRP and a second TRP, first determining whether at least two beams are received simultaneously at the user equipment, wherein if the group-based beam reporting is associated with the first TRP, each beam of the at least two beams is associated with the first TRP and if the group-based beam reporting is associated with the group of TRPs, one beam of the at least two beams is associated with the first TRP and at least one other beam of the at least two beams is associated with the second TRP and, if so determining, based at least in part on the first determining, to report the at least two beams to the network.