Mobile Terminal Beam Failure Recovery Acceleration
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Solution Overview
Problem
In 5G mobile communication systems, beam failure recovery takes a long time, causing terminals to fail in restoring connections to cells promptly due to the reliance on timers and counters for detection, which prolongs the failure detection and recovery phases.
Innovation Solution
Implementing a method for mobile communication terminals and network side devices to perform accelerated beam failure processing by directly initiating beam failure recovery, triggering radio link failures, and reporting failure instances, based on detection results from beam failure detection, to expedite recovery from beam failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection is performed using timers and counters, then detection reliability is improved, but beam failure recovery time increases
Solution Approach 1:
The terminal performs beam failure detection and identifies candidate beams in advance before actual beam failure occurs. When beam failure is detected, the terminal can immediately transmit the recovery request using the pre-identified candidate beam, eliminating the time needed for beam identification during recovery.
Solution Approach 2:
The patent allows the terminal to skip the timer-based detection process by directly transmitting beam failure recovery requests upon detecting beam failure. The terminal can immediately use pre-configured candidate beams for recovery, bypassing the traditional time-consuming detection and identification phases.
2Reliability
If traditional beam failure recovery procedure is followed, then connection restoration is achieved, but recovery speed deteriorates
Solution Approach 1:
Candidate beams are pre-identified and prepared before beam failure occurs. The terminal maintains information about potential candidate beams in advance, so when failure happens, the recovery process can immediately utilize these pre-prepared beams without delay.
Solution Approach 2:
The terminal autonomously performs beam failure detection and directly selects candidate beams for recovery without waiting for network side instructions. The terminal self-manages the recovery process by independently identifying candidate beams and transmitting recovery requests, eliminating network coordination delays.
3Measurement precision
If timer-based detection is used, then detection accuracy is improved, but processing time increases
Solution Approach 1:
The terminal skips the timer-based detection process entirely by directly detecting beam failure through reference signal quality measurements and immediately proceeding to recovery. The patent enables direct failure detection without waiting for timer expiration, significantly reducing detection time while maintaining accuracy through threshold-based judgment.
Data Source
AI summary
A cell beam failure processing method, a mobile communication terminal and a network side device. The cell beam failure processing method applied to a mobile communication terminal comprises: performing a detection operation on a target cell, the detection operation at least comprising a beam failure detection; and according to a detection result, performing, in the target cell, a first operation of accelerating beam failure processing.