V2X Sidelink Resource Coordination With Lower Overhead
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Solution Overview
Problem
The existing resource allocation mechanism in Release 16 (Rel-16) New Radio (NR)-Vehicle to X (V2X) mode 2 faces issues such as large overhead for coordination information, insufficient timeliness, and uncertain container of coordination information due to half duplex and hidden nodes in the resource allocation mechanism.
Innovation Solution
A resource selection method and device for a coordinating UE in a V2X sidelink system that determines and transmits sidelink resource coordination information, limiting the coordination information's time and reducing overhead by determining a resource indication window, type of coordination resource, and transmitting within a predetermined duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-UE coordination mechanism is used to solve half duplex and hidden nodes problems, then resource allocation reliability is improved, but coordination information overhead becomes too large
Solution Approach 1:
The patent extracts only the essential coordination information needed to solve half duplex and hidden nodes problems, rather than transmitting complete resource allocation data. By selecting and transmitting only critical coordination parameters (such as resource selection window indicators and exclusion information), the overhead is significantly reduced while maintaining the reliability benefits of inter-UE coordination.
Solution Approach 2:
The coordination information is segmented into essential and non-essential components. Only the essential segments that directly address half duplex and hidden nodes issues are transmitted, while other detailed resource allocation information is omitted or handled through pre-agreed protocols, thereby reducing overall overhead.
2Reliability
If inter-UE coordination mechanism is used to solve resource allocation problems, then resource allocation reliability is improved, but coordination information timeliness becomes insufficient
Solution Approach 1:
The patent performs preliminary resource selection and coordination information preparation before the actual resource allocation decision is needed. By pre-determining which coordination information is essential and preparing it in advance, the system can quickly transmit and process coordination data when needed, improving timeliness while maintaining reliability.
Solution Approach 2:
The coordination information transmission mechanism is made dynamic, adapting the amount and type of information transmitted based on current channel conditions, traffic patterns, and urgency of resource allocation. This allows the system to prioritize timely transmission of critical coordination data when latency is concerning, while reducing overhead during less time-sensitive scenarios.
3Productivity
If coordination information overhead is reduced, then transmission efficiency is improved, but container determination becomes uncertain
Solution Approach 1:
The patent changes the parameters of coordination information by standardizing its structure, size, and format. By defining fixed parameter sets and standardized encoding schemes for the essential coordination data, the system achieves both reduced overhead (improved transmission efficiency) and deterministic container determination (reduced complexity).
Data Source
AI summary
A resource selection method, a resource selection device and a terminal device are provided, which relate to the field of communication technology. The resource selection method includes: determining content of sidelink resource coordination information; transmitting the sidelink resource coordination information.