Beam Failure Recovery in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently recovering from beam failures, particularly in specific resource groups or multiple resource groups, which can lead to service disruptions and reduced performance.
Innovation Solution
A method and apparatus for performing beam failure recovery in a wireless communication system, where a user equipment (UE) detects beam failures and sends a beam failure recovery request (BFRQ) to the base station, and the base station responds with necessary information for recovery, including indicating the specific or multiple resource groups affected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam failure recovery is performed without identifying specific resource groups, then the recovery process is simpler, but the service disruption time increases and recovery efficiency decreases
Solution Approach 1:
The patent segments the beam failure recovery process by identifying and reporting specific resource groups where beam failure occurs. The UE transmits beam failure information indicating the specific resource group(s) affected, allowing the base station to target recovery efforts to particular resources rather than treating all resources uniformly, thereby reducing overall recovery time and improving efficiency.
Solution Approach 2:
The patent implements a feedback mechanism where the UE reports beam failure information to the base station, including identification of specific resource groups. The base station then uses this feedback information to formulate targeted recovery responses, creating a closed-loop system that accelerates recovery by continuously monitoring and responding to actual failure conditions.
2Measurement precision
If beam failure information including specific resource groups is transmitted, then the recovery accuracy improves, but the signaling overhead increases
Solution Approach 1:
The patent applies local quality by providing beam failure information at the specific resource group level rather than requiring comprehensive system-wide information. The UE transmits only the necessary identification information about which specific resource groups experienced beam failure, allowing precise localization without transmitting unnecessary data about unaffected resources, thus balancing accuracy with overhead efficiency.
Data Source
AI summary
A method and device for performing beam failure recovery in a wireless communication system. A method performed by a user equipment (UE) in a wireless communication system may include: based on a beam failure being detected for at least one of two beam failure detection (BFD)-reference signal (RS) sets configured for at least one serving cell among a plurality of serving cells, triggering at least one beam failure recovery (BFR) procedure for the at least one of the two BFD-RS sets; based on the at least one BFR being triggered and not cancelled for a first secondary cell (SCell) among the at least one serving cell, generating an enhanced BFR media access control (MAC)-control element (CE) based on at least one available uplink-shared channel (UL-SCH) resource; and transmitting, to a base station, the enhanced BFR MAC-CE.