Adaptive Radio Link Procedure for UE Power Saving
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Solution Overview
Problem
The frequent measurement and processing activities required for Radio Link Monitoring (RLM) and Beam Management (BM) procedures in wireless communications lead to significant power consumption and processing overhead in user equipment (UE), especially in low mobility scenarios where radio conditions remain stable.
Innovation Solution
A method that allows the UE to select between a normal and a relaxed mode of operation for RLPs based on specific criteria, such as mobility and radio link quality indicators, to reduce the frequency and accuracy of measurements and reporting, thereby conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent measurement and processing activities are performed for RLM and BM procedures, then radio link monitoring reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the RLM and BM procedures adaptive rather than static. The UE dynamically switches between normal mode and relaxed mode based on mobility state and radio link quality conditions. This allows the measurement frequency and processing intensity to vary according to actual network conditions, resolving the contradiction between maintaining high reliability during normal operation and reducing power consumption when conditions permit relaxed monitoring.
Solution Approach 2:
The patent changes key parameters of the RLM and BM procedures based on evaluated conditions. Specifically, it adjusts measurement frequency, reporting intervals, and evaluation thresholds between normal and relaxed modes. By modifying these parameters dynamically, the system maintains adequate monitoring reliability when needed while reducing power consumption during stable conditions, directly addressing the technical contradiction.
2Measurement precision
If normal mode operation is maintained for RLPs, then measurement accuracy is preserved, but processing overhead increases
Solution Approach 1:
The patent applies partial action by implementing relaxed mode where measurement and reporting activities are performed at reduced frequency and with lower accuracy requirements. Instead of continuously performing full-normal-mode measurements, the UE performs partial measurements during relaxed mode, sufficient to maintain basic link monitoring functionality while significantly reducing processing overhead. This resolves the contradiction by providing just enough measurement accuracy to maintain reliability without the full burden of normal-mode processing.
Solution Approach 2:
The system dynamically adjusts measurement precision and processing intensity based on mobility state and radio link quality. During relaxed mode, the UE reduces measurement frequency and reporting requirements, thereby lowering processing overhead while maintaining adequate monitoring capability. This dynamic adjustment resolves the contradiction between maintaining measurement accuracy and reducing processing complexity.
3Use of energy by moving object
If relaxed mode is activated for RLPs, then power consumption is reduced, but radio link quality monitoring performance degrades
Solution Approach 1:
The patent implements feedback mechanisms where the UE continuously evaluates mobility state and radio link quality conditions to determine whether to maintain normal mode or switch to relaxed mode. This feedback loop ensures that relaxed mode is only activated when conditions permit (stable radio conditions, low mobility), thereby reducing power consumption while maintaining adequate monitoring performance. The feedback mechanism prevents performance degradation by switching back to normal mode when conditions deteriorate.
Solution Approach 2:
The UE autonomously evaluates its own mobility state and radio link quality conditions to determine the appropriate operating mode without requiring continuous network control. This self-service approach allows the UE to activate relaxed mode independently when conditions permit, reducing power consumption while maintaining sufficient monitoring performance through its own assessments of link quality and mobility state.
4Device complexity
If measurement frequency is reduced in relaxed mode, then processing overhead is decreased, but detection capability deteriorates
Solution Approach 1:
The patent changes measurement parameters (frequency, thresholds, reporting intervals) based on the operating mode. In relaxed mode, measurement frequency is reduced and detection thresholds are adjusted to account for the lower measurement rate. These parameter changes reduce processing overhead while maintaining adequate detection capability for the specific conditions under which relaxed mode is activated (stable radio conditions, low mobility).
Data Source
AI summary
A method performed by a communication device includes obtaining criteria associated with a first mode of operation and a second mode of operation of a Radio Link Procedure (RLP) to be performed by the communication device. The method further includes selecting one of the first mode of operation and the second mode of operation to perform the RLP based on the criteria. The method further includes performing the RLP according to the first mode of operation or the second mode of operation based on the selection.