Non-Group Based Beam Reporting for Multi-TRP Wireless Devices
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Solution Overview
Problem
Existing methods for non-group based beam reporting in multi-TRP scenarios face challenges in supporting beam reporting with non-ideal backhaul between Transmission Points (TRPs), leading to increased latency and risk of radio link failure due to inefficient beam reporting mechanisms.
Innovation Solution
A method where a wireless device receives an indication for non-group based reporting and sends separate reports to each node, allowing it to perform measurements and report reference signals from multiple TRPs simultaneously, optimizing beam reporting to support multi-TRP operation with non-ideal backhaul by ensuring simultaneous reception of beams from different TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If group based beam reporting is used in multi-TRP scenarios, then the reporting mechanism is simplified, but latency increases and radio link failure risk increases due to inefficient beam reporting
Solution Approach 1:
The patent segments the beam reporting process by introducing separate report settings for each TRP (first TRP and second TRP). Each report setting includes specific reference signals and beams associated with its respective TRP, allowing independent measurement and reporting. This segmentation enables simultaneous beam reporting to multiple TRPs without grouping, thereby reducing latency while maintaining manageable complexity through structured organization of report settings.
2Device complexity
If group based beam reporting is used, then the reporting structure is simplified, but the average link budget performance deteriorates
Solution Approach 1:
The patent applies segmentation by creating separate report settings for each TRP, where each setting independently measures and reports reference signals (e.g., SSB, CSI-RS) from its associated TRP. This ensures that each TRP's beam characteristics are evaluated independently, optimizing the link budget for each individual TRP-UE connection rather than averaging across grouped TRPs, thereby improving overall reliability.
Solution Approach 2:
The patent implements local quality by allowing each report setting to be configured with specific reference signals and beams relevant to its associated TRP. This enables optimization of beam reporting parameters locally for each TRP-UE link, ensuring that the reporting reflects the actual local channel conditions and improves the average link budget performance.
3Loss of time
If non-group based reporting is implemented, then latency is reduced, but the device complexity increases due to multiple separate reports
Solution Approach 1:
The patent manages device complexity through systematic segmentation of report settings into distinct first and second report settings, each associated with specific TRPs. This structured segmentation organizes the multiple separate reports in a predictable manner, making the complexity manageable while achieving low latency through parallel processing of independent report settings.
Solution Approach 2:
The patent applies universality by designing report settings that can be configured with different reference signals (SSB, CSI-RS) and beams depending on the TRP association. This multi-functional report setting structure allows the same reporting mechanism to serve multiple TRPs with different characteristics, reducing the need for entirely separate reporting procedures and thereby managing device complexity while maintaining low latency.
Data Source
AI summary
A method performed by a wireless device. The wireless device obtains a first indication indicating that non-group based reporting is to be applied to any setting comprising the first indication. The setting indicates how to report, to a respective node, information on one or more respective reference signals to be received from the respective node. The reference signals use one or more respective beams. The wireless device performs measurements on the one or more respective signals. The wireless device then sends, based on the first indication, a non-group based report to a first node, comprising measurements on one or more first respective reference signals received from the first node, and based on the same first indication, another non-group based report to a second node comprising measurements on one or more second respective reference signals received from the second node.