Sidelink DRX Timer Adjustment for NR V2X Power-Reliability Balance
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Solution Overview
Problem
The lack of a discontinuous reception (DRX) mechanism in New Radio (NR) V2X technology leads to high power consumption without ensuring communication reliability in vehicle-to-everything (V2X) systems.
Innovation Solution
Implementing an information determination method that involves obtaining sidelink channel measurement results or receiving indication information to determine the timer length of a target DRX timer, using sidelink RRC or MAC CEs, and configuring corresponding relationships to optimize DRX settings based on channel conditions and QoS requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a DRX mechanism is not implemented in NR V2X, then communication reliability is maintained, but terminal power consumption increases
Solution Approach 1:
The patent implements a Discontinuous Reception (DRX) mechanism that enables terminals to periodically switch between active and sleep states. The terminal activates the receiver only during designated active periods to monitor sidelink channels and enters sleep mode during inactive periods, thereby reducing power consumption while maintaining communication reliability through periodic monitoring.
Solution Approach 2:
The patent introduces dynamic DRX configuration where the network can remotely adjust DRX parameters (such as active time, cycle length) based on channel conditions and service requirements. This dynamic adjustment allows the system to adapt between power-saving mode and high-reliability mode, resolving the contradiction between power consumption and communication reliability.
2Reliability
If the terminal continuously monitors the sidelink channel, then communication reliability is ensured, but power consumption increases
Solution Approach 1:
Instead of continuous monitoring, the terminal monitors sidelink channels periodically during active periods defined by the DRX cycle. The monitoring occurs only when needed based on the DRX timing configuration, reducing power consumption while maintaining reliability through appropriate active period scheduling.
3Use of energy by moving object
If the terminal enters sleep mode to save power, then power consumption decreases, but communication reliability may be compromised
Solution Approach 1:
The network monitors channel conditions and service requirements, then provides feedback by remotely configuring DRX parameters to the terminal. This feedback mechanism ensures that the terminal maintains appropriate monitoring activity levels to satisfy communication reliability requirements while maximizing power savings, resolving the contradiction between power consumption and reliability.
Solution Approach 2:
The DRX configuration is dynamically adjusted based on real-time channel conditions and service requirements. When reliability requirements are high, the network configures shorter DRX cycles or longer active periods. When power saving is prioritized and conditions allow, longer DRX cycles are configured. This dynamic adaptation resolves the fixed contradiction between power consumption and reliability.
Data Source
AI summary
Embodiments of the present disclosure provide an information determination method, apparatus, device, and computer-readable storage medium. The method includes: obtaining a sidelink channel measurement result, and determining a timer length of a target DRX timer according to the sidelink channel measurement result; or receiving indication information from a second terminal and determining the timer length of the target DRX timer according the indication information from the second terminal; the indication information being used to indicate the timer length of the target DRX timer; wherein the first terminal communicates with the second terminal through a sidelink.