NR V2X Sidelink HARQ Timer Control for Reliable Low-Power Feedback
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Solution Overview
Problem
Existing sidelink communication in NR V2X lacks efficient methods for performing sidelink Hybrid Automatic Repeat Request (HARQ) feedback and power consumption optimization.
Innovation Solution
A method and apparatus for transmitting sidelink control information and data through physical sidelink channels, receiving HARQ feedback, and operating a sidelink HARQ timer to optimize communication and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink HARQ feedback information is continuously monitored and processed, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by configuring a sidelink HARQ timer that periodically monitors HARQ feedback information at specific time intervals rather than continuously. The timer is started when downlink data is received and expires after a configured duration, creating periodic monitoring windows that balance reliability with power savings during idle periods.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the sidelink HARQ timer duration and parameters before communication occurs. The network configures the timer value in advance based on expected traffic patterns and reliability requirements, allowing the UE to operate efficiently without real-time decision-making about when to monitor, thus reducing power consumption while maintaining reliability.
2Productivity
If multiple PSCCH and PSSCH transmissions are performed, then data transmission capacity is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the control and data transmission into separate physical channels (PSCCH for control information, PSSCH for data). This segmentation allows independent optimization of each channel's resources and timing, enabling multiple transmissions without proportionally increasing overall device complexity, as each channel can be managed separately with its own HARQ process.
Data Source
AI summary
A method in which a first device performs sidelink communication is provided according to one embodiment of the present disclosure. For example, a method in which a first device operates a first timer and/or a second timer on the basis of sidelink HARQ feedback information may be provided.