Sidelink Resource Coordination for Hidden Node Collision Avoidance
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Solution Overview
Problem
Sidelink communication scenarios, such as V2V, face resource collisions and hidden node problems that existing technologies have not adequately addressed.
Innovation Solution
A method where a first terminal device receives control information from second and third devices indicating reserved resources, determines overlap, and transmits an indication to coordinate resource use if a satisfaction condition is met, thereby avoiding collisions and resolving hidden node issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices independently select and reserve communication resources without coordination, then device complexity and operation simplicity are maintained, but resource collisions and hidden node problems occur reducing reliability
Solution Approach 1:
The patent implements feedback mechanisms where terminal devices monitor resource usage and send feedback information to coordinating devices. When a device detects resource overlap or collision, it triggers feedback loops that enable dynamic adjustment of resource allocations, thereby improving communication reliability through continuous monitoring and correction while managing coordination complexity through event-driven feedback rather than constant coordination.
Solution Approach 2:
The patent introduces coordinating terminal devices that act as intermediaries between resource-selecting devices. These intermediary devices receive resource reservation information from multiple terminals, perform overlap detection, and coordinate resource allocation to prevent collisions. This intermediary approach improves reliability by centralizing coordination functions while allowing individual devices to maintain operational simplicity.
2Reliability
If terminal devices transmit on reserved resources without coordination, then communication efficiency and productivity are maintained, but resource collisions occur causing signal interference and data loss
Solution Approach 1:
The patent implements preliminary resource coordination where terminal devices exchange resource reservation information before actual communication occurs. The coordinating device detects potential overlaps in advance and adjusts resource allocations preemptively. This preliminary action ensures reliable resource allocation while maintaining communication efficiency by avoiding mid-transmission conflicts and retransmissions.
Solution Approach 2:
The patent applies preliminary anti-action by having coordinating devices identify and prevent resource collisions before they occur. Through monitoring reserved resources and detecting overlaps in advance, the system takes counter-actions to adjust resource allocations before actual interference can happen, thereby ensuring reliable communication while maintaining productivity by preventing rather than correcting errors.
3Device complexity
If no resource coordination mechanism is implemented, then system complexity is minimized, but hidden node problems cause undetected collisions and reduce communication reliability
Solution Approach 1:
The patent introduces coordinating terminal devices that serve as intermediaries for collision detection and resolution. These intermediary devices monitor resource reservations from multiple terminals, detect potential conflicts including hidden node scenarios, and coordinate solutions. This approach provides reliable collision detection capability while minimizing individual device complexity by concentrating coordination functions in specific intermediary nodes rather than requiring all devices to implement complex detection algorithms.
Data Source
AI summary
Embodiments of the present disclosure relate to communication. According to embodiments of the present disclosure, a first terminal device receives first control information indicating a first set of resources reserved by a second terminal device and second control information indicating a second set of resources reserved by a third terminal device, respectively. If the first set of resources and the second set of resources overlap with each other, the first terminal device whether a condition associate with coordination of terminal devices is satisfied. If the condition is satisfied, the first terminal device transmits an indication to at least one of the second and third terminal devices. In this way, collisions in resources can be avoided. Further, it also can solve the hidden node problem.