DRX Timer Coordination for Consistent V2X Signal Monitoring
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Solution Overview
Problem
In Vehicle to Everything (V2X) scenarios, the lack of coordination between transmitting UEs leads to disagreements on the understanding of Discontinuous Reception (DRX) states, causing inefficiencies and increased power consumption.
Innovation Solution
A method where a first node transmits a signaling indicating a current parameter of a first timer and monitors a target signal in a time-resource set, starting or updating the timer based on signal detection, ensuring consistent understanding across nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmitting UEs do not coordinate their DRX timer management, then each UE independently manages its own timer, but this leads to disagreement on DRX state understanding between transmitting and receiving UEs
Solution Approach 1:
The receiving UE feeds back its DRX timer state (running or stopped) to transmitting UEs through uplink signaling. This feedback mechanism enables transmitting UEs to adjust their timer management according to the receiving UE's actual state, ensuring both parties maintain consistent understanding of the DRX state without requiring complex coordination protocols
Solution Approach 2:
The patent introduces an intermediary signaling mechanism where the receiving UE acts as the reference for DRX timer state. By having transmitting UEs align their timer management to the receiving UE's state through this intermediary feedback loop, the system achieves state consistency without direct coordination between all transmitting UEs
2Reliability
If the receiving UE continuously monitors target signals from multiple transmitting UEs, then communication reliability is improved, but power consumption increases due to inability to enter low-power DRX state
Solution Approach 1:
The DRX timer configuration is made dynamic rather than static. The receiving UE can dynamically adjust its timer state (running or stopped) based on whether target signals are detected, and this dynamic state is communicated to transmitting UEs. This allows the system to adapt between active monitoring and power-saving states based on actual communication needs
Solution Approach 2:
The patent implements periodic monitoring through DRX cycles where the receiving UE alternates between active monitoring periods and low-power sleep periods. During DRX stopped states, the UE enters low-power mode while still maintaining the ability to quickly resume monitoring when needed, achieving energy-efficient periodic communication
3Use of energy by moving object
If the receiving UE enters low-power state to save energy, then power consumption is reduced, but the UE cannot detect target signals in time, affecting communication efficiency
Solution Approach 1:
The transmitting UE performs preliminary actions by sending wake-up signals or adjusting transmission timing based on the receiving UE's expected wake-up time. By anticipating when the receiving UE will be active, transmitting UEs can schedule their transmissions to ensure the receiving UE is in the correct monitoring state, eliminating the need for continuous monitoring while maintaining communication efficiency
Data Source
AI summary
A method and device used for discontinuous reception. A first node transmits a first signaling, the first signaling indicating a current parameter of a first timer, and monitors a target signal in a first time-resource set; when the target signal is detected in the first time-resource set and the first timer is in a stopped state, starts the first timer; when the first timer is in a running state, updates the first timer in each candidate slot; wherein the current parameter of the first timer is related to at least one of a state of the first timer or a value of the first timer. The present disclosure prevents misunderstanding of the first time-frequency resource pool, thus reducing power consumption and radio interference.