RLM Counter and Timer Management for Accurate RLF State
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the NR system, when the RLM monitoring threshold changes, the current RLM counter and timer cannot correctly reflect the signal quality under the new channel quality requirement criterion, leading to inaccurate determination of the RLF state.
Innovation Solution
The IS counter, OOS counter, and RLF timer are managed based on the current state of the RLF timer and the change of the IS/OOS threshold pair, with specific modes of operation defined for when the T310 timer is running or not running, to ensure accurate reflection of channel quality under the new threshold criterion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the IS/OOS threshold pair is reconfigured for different service types, then the adaptability of the system to different channel quality requirements is improved, but the complexity of managing RLM counters and timers increases
Solution Approach 1:
The patent applies parameter changes by reconfiguring the IS/OOS threshold pair (Qin, Qout) according to different service types and channel quality requirements. The network side can dynamically adjust these threshold parameters to match different BLER requirements, enabling the system to adapt to varying channel conditions while maintaining standardized counter and timer management procedures
Solution Approach 2:
The patent implements dynamics by enabling dynamic reconfiguration of the IS/OOS threshold pair through RRC signaling. The network can update the threshold parameters at any time based on service type changes or channel quality variations, and the UE dynamically adjusts its RLM evaluation criteria accordingly, making the system flexible and adaptive to changing conditions
2Ease of operation
If the RLM counter and timer continue to operate under old threshold criteria after threshold pair change, then the simplicity of operation is maintained, but the measurement precision of signal quality evaluation deteriorates
Solution Approach 1:
The patent applies preliminary action by resetting the RLM counters (In-Sync counter and Out-Of-Sync counter) and restarting the T310 timer immediately when the IS/OOS threshold pair is reconfigured. This ensures that the counter and timer operations start fresh under the new threshold criteria, maintaining measurement precision while keeping the operational logic simple and standardized
Data Source
Figure 1~2
Figure 3~4
AI summary
Disclosed are a method, apparatus and device for managing a threshold pair change. The method comprises: determining a radio link monitor reference signal In Sync indication/Out Of Sync indication monitoring threshold; and when the radio link monitor reference signal In Sync indication/Out-Of Sync indication monitoring threshold changes, respectively managing, in conjunction with the state of a current radio link failure timer and according to the change of an In Sync indication/Out-Of Sync indication threshold pair, an In Sync indication counter, an Out-Of Sync indication counter, and a timer related to a radio link failure. By means of the present application, the channel quality under a new channel quality requirement can be more accurately reflected, so that a radio link failure state can be determined more accurately according to the current channel quality requirement.