V2X Sidelink Feedback Sequence Randomization to Reduce Interference
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Solution Overview
Problem
In V2X sidelink communication, the lack of intermediate nodes for scheduling leads to interference between feedback information from different user devices, which reduces communication performance.
Innovation Solution
A feedback information transmission method that randomizes the selection of basic sequences for user devices based on information items of sidelink communication, ensuring orthogonal sequences are used to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If user devices transmit feedback information using sidelink communication without intermediate scheduling nodes, then communication autonomy and speed are improved, but interference between feedback information from different user devices increases
Solution Approach 1:
The patent applies parameter changes by dynamically selecting different basic sequences based on parameters such as source ID, destination ID, and time-frequency resource information. This randomization of sequence selection changes the transmission parameters to avoid fixed patterns that cause interference, thereby resolving the contradiction between autonomous fast communication and interference reduction
2Device complexity
If the same basic sequence is used by multiple user devices for feedback transmission, then device complexity is reduced, but the probability of sequence collision and interference increases
Solution Approach 1:
The patent implements local quality by making each user device select basic sequences based on its own local information (source ID, destination ID, time-frequency resources). This decentralized approach allows each device to independently choose sequences that are locally optimized for its specific communication context, reducing overall collisions without requiring complex centralized coordination
3Object-affected harmful factors
If orthogonal sequences are randomly assigned to user devices, then interference between devices is reduced, but the complexity of sequence management and coordination increases
Solution Approach 1:
The patent applies self-service by enabling each user device to autonomously select its own basic sequence based on pre-agreed rules and its own identification information. The devices self-organize the sequence allocation without external intervention, automatically avoiding collisions through the deterministic yet distributed selection process based on source/destination IDs and resource information
Data Source
AI summary
A feedback information transmission method can include: selecting a basic sequence according to an information item of sidelink communication; generating feedback information of the sidelink communication according to the basic sequence; and transmitting the feedback information to a second terminal.