NR V2X Inter-UE Coordination Timer for Latency-Bound Reporting
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Solution Overview
Problem
The increasing demand for mobile broadband communication and V2X services requires efficient inter-UE coordination mechanisms to manage latency and reliability in wireless communication systems, particularly in sidelink communication scenarios.
Innovation Solution
A method and apparatus for performing inter-UE coordination (IUC) through a timer-based mechanism, where a first device receives an IUC information report and request, triggers and manages an IUC report timer, and transmits IUC information based on the timer, ensuring efficient retransmission using hybrid automatic repeat request (HARQ) feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-UE coordination mechanism is implemented to manage latency and reliability in V2X communication, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent introduces an intermediary timer mechanism (IUC report timer) that mediates between the IUC information report transmission and the latency bound requirement. The timer acts as a control element that automatically manages the transmission timing, reducing the need for complex manual coordination while ensuring reliability constraints are met.
Solution Approach 2:
The system implements self-service through autonomous timer-based control where the UE automatically triggers and manages the IUC report timer based on received latency bounds and IUC requests. This self-managing mechanism reduces network intervention complexity while maintaining reliable communication through automated latency control.
2Loss of time
If timer-based IUC report mechanism is used to ensure latency bound compliance, then latency control is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing the timer-based IUC report mechanism only when specific conditions are met (upon receiving an IUC request and latency bound). The timer is triggered selectively rather than continuously, reducing unnecessary signaling overhead while maintaining latency control for critical communications.
Solution Approach 2:
The system dynamically adjusts the timer value parameter based on the received latency bound from the second UE. By changing the timer parameter to match the specific latency requirement, the system achieves precise latency control without excessive signaling, as the timer adapts to different service requirements.
3Productivity
If IUC information report is triggered based on IUC request to enhance coordination efficiency, then communication efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the first UE triggers an IUC information report in response to an IUC request from the second UE. This request-response feedback loop enables efficient coordination by allowing UEs to dynamically request and provide coordination information based on actual communication needs, improving efficiency while maintaining manageable resource allocation through event-driven operation.
Data Source
AI summary
A method of operating a first device 100 in a wireless communication system is proposed. The method may include: receiving, from a second device 200, an IUC request; triggering an IUC information report based on the IUC request; starting an IUC report timer related to a transmission of IUC information based on the triggered IUC information report; transmitting the IUC information to the second device 200 based on the IUC report timer being running; stopping the IUC reporting timer based on the IUC information being transmitted; and canceling the triggered IUC information report based on the IUC information being transmitted.