Sidelink DRX Timer Selection for V2X QoS Profiles
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Solution Overview
Problem
In sidelink communication, the existing configurations for DRX (Discontinuous Reception) parameters are not clearly defined for destination IDs, leading to inefficiencies in power saving and reliability, particularly in vehicle-to-everything (V2X) scenarios where multiple DRX configurations can be related to the same ID, causing confusion and suboptimal performance.
Innovation Solution
A method and device for selecting the appropriate SL DRX timer and cycle based on the destination ID by mapping multiple SL DRX configurations to different quality of service (QoS) profiles, where the RX UE selects the SL DRX timer with the longest length and cycle with the shortest or longest duration to ensure optimal power saving and reliability, allowing for flexible configuration options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SL DRX configurations are mapped to the same destination ID, then the system can support diverse QoS requirements, but it causes confusion and suboptimal performance in selecting appropriate DRX parameters
Solution Approach 1:
The patent applies local quality by mapping different SL DRX configurations to different QoS profiles, where each QoS profile has specific characteristics (e.g., latency requirements, reliability needs). The RX UE selects the appropriate SL DRX configuration based on the destination ID and corresponding QoS profile, ensuring that each communication flow receives locally optimized DRX parameters tailored to its specific QoS requirements rather than using a single universal configuration.
2Reliability
If the RX UE monitors all SL DRX configurations, then no communication is missed, but power consumption increases
Solution Approach 1:
The patent segments the monitoring task by dividing SL DRX configurations into separate groups associated with different QoS profiles and destination IDs. Instead of monitoring all configurations continuously, the RX UE selectively monitors only the SL DRX configuration corresponding to the active destination ID and QoS profile, thereby reducing power consumption while maintaining reliable communication for the specific active session.
Solution Approach 2:
The patent implements dynamic SL DRX configuration selection where the RX UE adapts its monitoring behavior based on the current communication state. The UE dynamically switches between different SL DRX configurations depending on which destination ID is currently active and what QoS profile applies, allowing the system to optimize power consumption in real-time while maintaining communication reliability when needed.
3Device complexity
If a single SL DRX configuration is used for all destination IDs, then configuration complexity is reduced, but power saving efficiency decreases
Solution Approach 1:
The patent changes the parameters of SL DRX configurations by introducing multiple configurations with different parameters (timer values, cycle lengths, on-duration settings) mapped to different QoS profiles. Each SL DRX configuration has customized parameters optimized for specific QoS requirements, allowing the system to achieve better power saving efficiency by selecting appropriate parameter sets based on the active destination ID and communication demands.
Data Source
AI summary
Provided are a method by which a first apparatus carries out wireless communication, and an apparatus supporting same. The method comprises the steps of: acquiring information related to a plurality of sidelink (SL) DRX timers being mapped to a plurality of SL quality of service (QOS) profiles related to a destination identifier (ID); receiving, via a physical sidelink control channel (PSCCH), second sidelink control information (SCI), and first SCI for scheduling of a physical sidelink shared channel (PSSCH); receiving the second SCI and a medium access control (MAC) protocol data unit (PDU) via the PSSCH; acquiring the destination ID on the basis of at least one of the second SCI and the MAC PDU; selecting, on the basis of the destination ID, one SL DRX timer from among the plurality of SL DRX timers; and monitoring SCI on the basis of the one SL DRX timer, wherein the one SL DRX timer may be an SL DRX timer having the longest length from among the plurality of SL DRX timers.