Sidelink Candidate Resource Sharing for Reliable V2X Allocation
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Solution Overview
Problem
Existing vehicle-to-everything (V2X) communication systems face challenges in mode 2 resource allocation, where terminal devices autonomously select resources, leading to increased latency and reduced reliability.
Innovation Solution
A method for resource allocation in V2X communications where terminal devices determine whether to obtain information about candidate resources from another device and use this information to select target resources for sidelink transmission, enabling coordinated resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If terminal devices autonomously select resources in mode 2, then device complexity is reduced, but reliability decreases and latency increases
Solution Approach 1:
The patent introduces a resource allocation information message as an intermediary carrier that enables terminal devices to exchange resource selection information. This intermediary mechanism allows devices to achieve coordinated resource allocation without requiring complex direct control, thereby improving reliability while maintaining the simplicity of autonomous selection. The message carries candidate resource information that facilitates coordinated decision-making between terminals.
Solution Approach 2:
The patent implements a feedback mechanism where terminal devices send resource allocation information messages containing candidate resource details to other devices. This feedback loop enables devices to learn from each other's resource selection decisions and adjust their own choices accordingly, improving the reliability of resource allocation while preserving the autonomous selection approach.
2Ease of operation
If terminal devices autonomously select resources in mode 2, then ease of operation is improved, but latency increases
Solution Approach 1:
The patent applies preliminary action by having terminal devices prepare and exchange resource allocation information messages in advance of actual data transmission. Devices proactively share candidate resource information and receive feedback, enabling faster resource selection decisions during critical transmission periods. This preliminary coordination reduces the time needed for resource allocation latency without compromising the ease of autonomous operation.
Solution Approach 2:
The resource allocation information message serves as an intermediary that enables efficient information exchange between devices. This intermediary mechanism allows devices to quickly share and process resource selection information, reducing latency in the resource allocation process while maintaining the simplicity and ease of operation of autonomous selection.
3Reliability
If terminal devices exchange resource information, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses a standardized resource allocation information message as an intermediary that simplifies the information exchange process. This pre-defined message format reduces the complexity of inter-device communication by providing a structured template for resource information exchange, thereby improving reliability without significantly increasing device complexity.
Solution Approach 2:
The patent employs parameter changes by modifying the information content and structure of resource allocation messages based on specific communication conditions. The system can adjust message parameters such as resource pool identifiers, time window durations, and selection criteria to optimize reliability for different scenarios while maintaining manageable complexity through parameterization rather than structural changes.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communications. A method comprises determining, at a first terminal device, whether to obtain information about candidate resources for a sidelink transmission. The method further comprises in response to a determination that the information is to be obtained, receiving the information from a second terminal device. The method further comprises determining target resources for performing the sidelink transmission based on the information.