UE DRX Configuration Triggering via Mobility and WUS
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Solution Overview
Problem
Current discontinuous reception (DRX) configurations in wireless communications systems can lead to inefficiencies due to frequent on durations, resulting in significant battery usage, or infrequent on durations, leading to unreliable communications, especially in high mobility scenarios.
Innovation Solution
A method and system that enable user equipment (UE) to trigger the transmission of control signaling requesting updates to its DRX configuration based on mobility and wake up signal (WUS) configurations. This allows the UE to adjust its DRX parameters to optimize communication performance and power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent on durations are configured in DRX, then communication reliability is improved, but battery consumption increases significantly
Solution Approach 1:
The patent applies dynamics by making the DRX configuration adaptive rather than static. The network node dynamically adjusts DRX parameters (on duration frequency, cycle lengths) based on real-time UE mobility state detection. When high mobility is detected, the system transitions to a DRX configuration optimized for mobility conditions, balancing communication reliability and power consumption according to current operating conditions.
Solution Approach 2:
The patent changes physical parameters of the DRX configuration based on mobility conditions. Specifically, it modifies time-related parameters (on duration periodicity, short/long cycle durations) and signal parameters (WUS configuration) according to detected mobility state. This parameter adaptation resolves the contradiction by optimizing the balance between reliability and energy consumption for different mobility scenarios.
2Use of energy by moving object
If infrequent on durations are configured in DRX, then battery consumption is reduced, but communication reliability deteriorates
Solution Approach 1:
The system dynamically adapts DRX configuration based on mobility state. For low mobility UEs, it configures more frequent on durations to ensure communication reliability, while for high mobility UEs, it adjusts to appropriate periodicity that maintains reliability without excessive power consumption.
Solution Approach 2:
The patent modifies DRX time parameters (on duration frequency, cycle durations) based on mobility conditions. By changing these parameters adaptively, the system ensures that UEs with different mobility characteristics receive optimized configurations that maintain reliability while managing power consumption appropriately.
3Device complexity
If standard DRX configuration is used without mobility consideration, then device complexity is reduced, but communication performance deteriorates in high mobility scenarios
Solution Approach 1:
The UE performs self-service by autonomously detecting its own mobility state using available measurements (reference signals, channel conditions) and triggering appropriate DRX configuration updates. This self-detection and self-triggering mechanism improves communication performance without requiring complex external control infrastructure.
Solution Approach 2:
The system implements feedback mechanisms where the UE monitors communication conditions and mobility indicators, then feeds this information back to trigger DRX configuration updates. The network node receives this feedback and adjusts configurations accordingly, creating a closed-loop system that adapts to changing conditions while maintaining manageable complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution improves communication performance and reduces power consumption by allowing the UE to dynamically adjust its DRX configuration in response to changing mobility conditions and WUS configurations.
Implementation Method 1
the UE may determine that the speed of the UE satisfies the mobility threshold based on a doppler frequency shift for the UE satisfying a threshold frequency shift
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A system may support techniques for triggering user equipment (UE) assistance information (UAI) based on mobility, wake up signal (WUS) configuration, or both. In some cases, a UE may communicate with a network node (e.g., a base station) on a first channel according to a discontinuous reception (DRX) configuration. The UE may determine that a speed of the UE satisfies a mobility threshold and may transmit UAI requesting one or more updated DRX configuration parameters based on the speed of the UE satisfying the mobility threshold. Additionally or alternatively, the UE may receive signaling configuring the UE to monitor for WUSs and may transmit UAI requesting one or more updated DRX configuration parameters based on the WUS configuration. The UE may receive control signaling configuring the DRX configuration with the one or more requested parameters in response to the UAI.