Multi-RAT Terminal Resource Coordination for Collision Avoidance
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Solution Overview
Problem
Existing wireless communication systems face challenges in sharing resources between device-to-device direct communications that utilize different Radio Access Technologies (RATs), as signals from one RAT are distinct from those of another, making it difficult to detect and avoid collisions.
Innovation Solution
A terminal is equipped with communication units for both a first and second RAT, allowing it to control resource sharing between their respective resource pools based on information from the second RAT, facilitating coordinated transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals autonomously determine resources and perform collision-avoiding operations by decoding signals, then collision avoidance is achieved within the same RAT, but resource sharing between different RATs cannot be performed because signals are defined as different
Solution Approach 1:
The patent introduces an intermediary mechanism where a terminal determines its transmission resource in the first RAT based on resource usage information obtained from the second RAT. This intermediary approach allows the terminal to coordinate resource selection across different RATs, enabling resource sharing while avoiding collisions that would otherwise occur due to signal incompatibility between RATs
Solution Approach 2:
The patent applies preliminary action by having the terminal obtain resource usage information from the second RAT before determining its transmission resource in the first RAT. This advance knowledge allows the terminal to proactively select resources that will not cause collisions, rather than reacting to collisions after they occur
Data Source
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AI summary
A terminal includes: a first communication unit configured to perform transmission and reception in a resource pool of a first RAT (Radio Access Technology) with respect to the resource pool of the first RAT and a resource pool of a second RAT; a second communication unit configured to perform transmission and reception in the resource pool of the second RAT; and a control unit configured to control communications in the resource pool of the first RAT. The control unit determines a resource used for a transmission of a shared channel or for a transmission of a shared channel and a control channel in the resource pool of the first RAT, based on information in the second RAT obtained from the second communication unit.