Inter-UE Coordination Request Signal for V2X Collision Avoidance
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication, data transmission collisions occur due to multiple vehicles transmitting signals in the same area, leading to degraded system performance and potential safety issues, particularly in hidden-node situations where transmitting UEs are unaware of each other and reserve the same transmission resources, causing potential-collisions.
Innovation Solution
A first UE device transmits a request for inter-UE coordination (IUC) information to a second UE device within physical resources containing a Destination Layer 2 identifier, which includes preferred or non-preferred communication resource lists to avoid collisions, allowing the first UE device to select appropriate communication resources based on the received IUC information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple vehicles transmit signals in the same area without coordination, then communication coverage is expanded, but data transmission collisions occur and system performance degrades
Solution Approach 1:
The patent applies preliminary action by having UEs exchange coordination information before actual data transmission occurs. The first UE sends a request for coordination information to the second UE, and the second UE responds with IUC information containing preferred or non-preferred resources. This preliminary exchange allows both UEs to select transmission resources that minimize collision probability before the actual transmission begins, thus maintaining reliability while expanding coverage.
Solution Approach 2:
The patent implements feedback through the IUC information exchange mechanism. The second UE provides feedback in the form of coordination information (preferred or non-preferred resource lists) based on its transmission history and observed interference patterns. This feedback loop enables the first UE to adjust its resource selection dynamically, reducing collisions and improving transmission reliability in the expanded coverage area.
2Ease of operation
If UEs reserve the same transmission resources without awareness of each other, then transmission simplicity is maintained, but hidden-node collisions occur
Solution Approach 1:
The patent introduces an intermediary coordination information exchange mechanism between UEs. Instead of direct resource reservation without awareness, the system uses coordination information (containing preferred or non-preferred resource lists) as an intermediary to mediate resource selection. This intermediary layer provides implicit coordination without requiring complex explicit negotiation protocols, maintaining ease of operation while eliminating hidden-node collisions through informed resource selection.
3Reliability
If IUC information exchange is implemented between UEs, then collision avoidance is improved, but additional signaling overhead is introduced
Solution Approach 1:
The patent applies partial action by exchanging only the necessary coordination information (preferred or non-preferred resource lists) rather than full transmission state information. This selective information exchange achieves sufficient collision avoidance performance without the excessive complexity of complete state synchronization. The coordination information is transmitted in a condensed format that provides effective resource coordination while minimizing signaling overhead and protocol complexity.
Data Source
AI summary
The devices, systems, and methods discussed herein involve a first UE device transmitting a request for inter-UE coordination (ICC) information to a second UE device. The request for IUC information is transmitted within a set of physical resources containing control information indicating a Destination Layer 2 identifier (Destination L2 ID) associated with the second UE device. The second CE device transmits the IUC information to the first UE device. The first UE device selects, based at least partially on the IUC information, communication resources to be used for communication with the second UE device.