Sidelink Coordination Timing for V2X Resource Allocation
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Solution Overview
Problem
In sidelink communication, especially in Mode-2 of the V2X system, the reliability of sidelink communication is reduced due to the lack of consideration for radio resource occupation around the receiving terminal apparatus, leading to interference and missed opportunities for sending sidelink information.
Innovation Solution
The proposed solution involves determining a specific time for sending coordination information based on a reference time and a time offset, ensuring that the information is transmitted before the first terminal apparatus misses the opportunity, thereby improving the reliability of sidelink communication by considering both the transmitting and receiving terminal apparatuses' resource sensing results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal apparatus at the receiving end sends coordination information without limiting the sending occasion, then the transmitting end can obtain resource sensing results from both ends, but the transmitting end may miss the occasion for sending sidelink information, reducing communication reliability
Solution Approach 1:
The patent applies preliminary action by determining a first time based on a first reference time and a first time offset before the transmitting end sends sidelink information. This ensures that coordination information is received and processed in advance, preventing missed transmission opportunities while maintaining communication reliability
Solution Approach 2:
The patent implements feedback by having the receiving end send coordination information containing its sensing results to the transmitting end. The transmitting end uses this feedback to make informed resource selection decisions, improving overall system reliability through coordinated resource allocation
2Device complexity
If the transmitting end only considers its own sensing result, then the resource selection process is simple, but the receiving end experiences interference from wireless communication in its vicinity
Solution Approach 1:
The patent uses coordination information as an intermediary mechanism. The receiving end's sensing results are transmitted through this intermediary to the transmitting end, enabling the transmitting end to select resources that avoid interference at the receiving end without significantly increasing system complexity
Solution Approach 2:
The receiving end provides feedback about its sensing results to the transmitting end. This feedback loop enables the transmitting end to make resource selection decisions that consider the receiving end's environment, reducing interference while maintaining manageable complexity through standardized feedback mechanisms
Data Source
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AI summary
This application relates to a communication method, an apparatus, and a system, and is applicable to fields such as Internet of Vehicles, intelligent driving, assisted driving, and intelligent connected vehicles. The method includes: determining a first time based on a first reference time and a first time offset, and sending, to a first terminal apparatus at the first time or before the first time, coordination information indicating a first resource, where the first resource is for determining a second resource for receiving sidelink information from the first terminal apparatus. Therefore, the time for sending the coordination information is limited. This ensures that the first terminal apparatus has sufficient time to determine, when the first terminal apparatus receives the coordination information, the second resource for sending the sidelink information, thereby improving reliability of sidelink communication.