Sidelink Terminal Resource Switching for Decentralized Collision Avoidance
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Solution Overview
Problem
Existing communication systems in radio networks face challenges with consecutive message collisions, particularly in applications like platooning, where decentralized collision avoidance without a central scheduling unit is necessary to ensure high reception rates.
Innovation Solution
A decentralized collision avoidance strategy is implemented using sidelink channels for terminal devices to send initial messages, receive responses, and determine resource changes based on these responses, allowing terminals to switch radio resources to avoid collisions and improve spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a central scheduling unit is used to allocate radio resources, then collision avoidance is improved, but device complexity and network infrastructure requirements increase
Solution Approach 1:
The patent enables terminal devices to autonomously monitor collision indicators and switch radio resources without requiring a central scheduling unit. Each terminal independently detects collisions through feedback messages from other terminals and autonomously decides to switch to alternative resources, making the system self-organizing and eliminating the need for complex centralized infrastructure.
Solution Approach 2:
The patent implements a feedback mechanism where terminal devices send feedback messages indicating successful or unsuccessful message reception. These feedback messages enable transmitting terminals to detect collisions and trigger resource switching decisions, creating a distributed feedback loop that achieves collision avoidance without centralized control.
2Measurement precision
If terminal devices send responses to every received message, then collision detection accuracy is improved, but data traffic increases
Solution Approach 1:
The patent implements a probabilistic response mechanism where terminal devices randomly determine whether to send feedback messages based on a threshold comparison. This partial action approach maintains sufficient collision detection accuracy by having some terminals provide feedback while reducing overall data traffic compared to universal response transmission.
Data Source
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AI summary
The invention relates to a first terminal (A; J) of a radio communication network (2), wherein the first terminal (A; J) comprises at least one processor, at least one memory with a computer program code and at least one communication module and at least one antenna, wherein the computer program code is configured such that, with the at least one processor, the at least one communication module and the at least one antenna, it causes the first terminal (A; J) to send first messages via a first radio resource to a group of other terminals, to receive at least one response, after sending each first message, from at least one of the other terminals of the group, to determine a resource modification decision according to the at least one response, and to send second messages according to the resource modification decision via a second radio resource to the group of other terminals, wherein the second radio resource is different from the first radio resource.