Beam Failure Recovery Timer Control for Random Access Resource Management
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Solution Overview
Problem
In new radio (NR) communication, the beam failure recovery timer is inadvertently reset when a random access is triggered, leading to excessive occupation of resources for contention-free random access, as it should continue timing when the ongoing random access is continued.
Innovation Solution
Implement a method where the beam failure recovery timer is only reset or restarted when initiating a triggered random access, and keep timing based on the current value if the ongoing random access is continued, using configuration information to determine whether to initiate or continue the random access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the beam failure recovery timer is reset when a random access is triggered, then the timer control is simplified, but the timer expires too late causing excessive occupation of contention-free random access resources
Solution Approach 1:
The patent applies dynamics by making the timer control behavior adaptive based on the random access state. When random access is ongoing, the timer continues timing without reset. When random access is not ongoing, the timer is reset upon trigger. This dynamic adjustment resolves the contradiction between simplified control and correct timing.
Solution Approach 2:
The patent changes the parameter of timer reset behavior based on the condition of ongoing random access. By introducing a conditional parameter (whether random access is ongoing), the system achieves precise timer control that prevents excessive resource occupation while maintaining manageable complexity through clear conditional logic.
2Loss of time
If the beam failure recovery timer continues timing without reset, then resource occupation is reduced, but the timer control logic becomes more complex
Solution Approach 1:
The patent segments the timer control logic into distinct cases: one for when random access is ongoing and another for when it is not. This segmentation allows each case to have simple, dedicated handling rules, reducing overall complexity while achieving the desired timing behavior that prevents excessive resource occupation.
Solution Approach 2:
The system uses feedback from the random access state (ongoing or not) to determine timer reset behavior. This feedback mechanism enables the timer control to automatically adapt to current system conditions, achieving precise resource management without requiring complex manual intervention or overly complicated control logic.
3Ease of operation
If the timer is reset upon triggering random access, then the control procedure is straightforward, but contention-free random access resources are occupied for an over long time
Solution Approach 1:
The patent makes the timer control dynamic by checking whether random access is ongoing before deciding to reset. This dynamic approach maintains ease of operation through clear conditional logic while preventing excessive resource occupation by continuing the timer appropriately in ongoing random access scenarios.
Solution Approach 2:
By introducing a conditional parameter (random access ongoing state), the patent changes the timer reset behavior to match system needs. This parameter-based control achieves both simplicity in implementation and correctness in resource management, avoiding excessive occupation of contention-free random access resources.
Data Source
AI summary
The present disclosure relates to a timer control method, which is applicable to an electronic device. The method includes: when a medium access control layer receives a beam failure instance indication sent by a physical layer, determining whether a count value of a beam failure indication counter is greater than or equal to a preset value; if the count value of the beam failure indication counter is greater than or equal to the preset value, triggering a random access; determining whether to initiate the triggered random access; if it is determined to initiate the triggered random access, upon initiating the triggered random access, resetting or restarting a beam failure recovery timer. According to the embodiments of the present disclosure, the case that user equipment occupies resources of contention-free random access for a long time can be avoided.