Dynamic RS Set Updates for 5G Beam Failure Recovery
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Solution Overview
Problem
In 5G New Radio (NR) systems, beam failures occur frequently due to poor channel measurement parameters, leading to reduced success rates in beam failure recovery, especially when the terminal moves or the access network device's antenna direction changes.
Innovation Solution
A method and apparatus for configuring an RS set, where a terminal acquires channel measurement results and sends a measurement report to the access network device when specific conditions are met, allowing the access network device to update the RS set, thereby maintaining a set with higher channel measurement parameters, reducing beam failure probability and improving recovery success.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal uses a fixed RS set configured by the access network device, then the configuration is simple and easy to manage, but the beam failure probability increases when the terminal moves or antenna direction changes
Solution Approach 1:
The patent implements dynamic RS set configuration where the access network device updates the RS set based on terminal movement and channel conditions. The terminal reports measurement results, and the network device adjusts the RS set accordingly, transforming the static configuration into a dynamic adaptive system that maintains reliability during mobility.
Solution Approach 2:
The patent establishes a feedback mechanism where the terminal measures channel quality of reference signals and reports measurement results back to the access network device. The network device uses this feedback to determine whether to update the RS set, creating a closed-loop system that adapts to changing conditions while maintaining simple terminal-side operation.
2Reliability
If the RS set is updated frequently to maintain optimal channel measurement parameters, then the beam failure recovery success rate improves, but the signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing selective RS set updates based on measurement thresholds. The terminal only triggers updates when channel measurement parameters fall below predetermined thresholds or when significant changes are detected, avoiding unnecessary signaling while ensuring updates occur when needed for recovery success.
Solution Approach 2:
The patent changes the parameter of RS set configuration from static to conditionally dynamic. By introducing threshold-based triggering mechanisms and measurement result reporting, the system adjusts the configuration state based on channel conditions, achieving optimal recovery success rate while minimizing signaling overhead through intelligent parameter management.
Data Source
AI summary
A method for configuring a reference signal (RS) set includes: acquiring, by a terminal, a channel measurement result; sending, by the terminal a measurement report to an access network device in response to the channel measurement result meeting a preset condition; updating, by the access network device, a target RS set based on the measurement report; and sending, by the access network device, RS set update information to the terminal.