UE Mobility State Based RRM Relaxation
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Solution Overview
Problem
In wireless communication systems, devices used as User Equipment (UE) often require power-saving modes, especially for reduced capability devices (RedCap devices) that do not need high data rates and are delay tolerant. Existing technologies struggle to efficiently manage Radio Resource Management (RRM) for these devices, leading to unnecessary power consumption through frequent reference signal measurements and cell reselections.
Innovation Solution
The method involves determining the mobility state of a UE, which indicates its mobility capability, and performing reference signal measurements in a relaxation mode within specific cells. The base station determines the available cells for the UE based on its mobility state and configures the network accordingly, allowing the UE to conserve power by reducing unnecessary measurements and reselections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent reference signal measurements and cell reselections are performed, then network reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the RRM measurement configuration adaptive to the UE's mobility state. The network dynamically adjusts measurement frequencies and cell reselection criteria based on whether the UE is detected to be mobile or stationary, allowing the system to transition between high-reliability measurement modes and power-saving modes as conditions change
Solution Approach 2:
The patent changes key RRM parameters such as measurement intervals, reselection thresholds, and measurement activation conditions based on mobility state detection. By modifying these parameters dynamically, the system reduces measurement frequency for stationary UEs while maintaining reliable measurements for mobile UEs, thus resolving the contradiction between reliability and power consumption
2Measurement precision
If standard RRM measurements are performed for all UEs, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by tailoring RRM measurement configurations to individual UE characteristics, specifically mobility state. Instead of applying uniform measurement protocols to all UEs, the system adjusts measurement precision and frequency based on each UE's detected mobility behavior, reducing complexity for stationary devices while maintaining precision for mobile devices
Data Source
AI summary
Provided is a method for a user equipment (UE). The method includes determining a mobility state of the UE and performing reference signal measurement in a relaxation mode within at least one cell. The mobility state indicates mobility capability of the UE, and, the at least one cell is determined based on the mobility state.