Sidelink Capability Exchange via Configuration-Based Selection
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Solution Overview
Problem
In wireless communication systems, especially in New Radio (NR) V2X sidelink communications, the exchange of capability information between devices is inefficient due to the large size of capability and Access Stratum (AS) configuration data, requiring significant resources for reliable transmission.
Innovation Solution
A method where a wireless device acquires sidelink configuration, determines capability information elements based on this configuration, and transmits these elements to another device, allowing for efficient exchange of capability information, thereby reducing the need to transmit full capability information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If full capability information and AS configuration are transmitted in PC5-RRC messages, then complete capability exchange is achieved, but transmission resources are excessively consumed
Solution Approach 1:
The patent extracts only the necessary capability information elements required for sidelink communication from the complete capability information. The transmitting device determines which capability elements are relevant based on the sidelink configuration and transmits only those selected elements, thereby reducing transmission overhead while maintaining sufficient information for establishing sidelink connections.
Solution Approach 2:
The capability information is segmented into multiple parts: essential capability elements needed for sidelink operation are transmitted in PC5-RRC messages, while less critical or optional capability information is omitted or transmitted separately. This segmentation allows the system to prioritize transmission of critical information and reduce overall resource consumption.
2Productivity
If capability information elements are selected and transmitted based on sidelink configuration, then transmission efficiency is improved, but information completeness may be compromised
Solution Approach 1:
The patent applies local quality by transmitting different sets of capability information elements based on the specific sidelink configuration and communication requirements. Instead of uniformly transmitting all capability elements in all scenarios, the system selectively transmits only those elements that are locally relevant to the current sidelink context, thereby optimizing the balance between efficiency and completeness.
Solution Approach 2:
The patent implements partial action by transmitting a subset of capability information elements that are sufficient for establishing and managing sidelink connections, rather than transmitting the complete set of all possible capability elements. The selected subset includes only those elements necessary for the specific sidelink scenario, achieving adequate information exchange with reduced overhead.
Data Source
AI summary
A method and apparatus for exchange of capability information for sidelink communications in a wireless communication system is provided. The first wireless device acquires sidelink configuration for sidelink transmission. The first wireless device determine capability information elements related to the first wireless device based on the sidelink configuration. The first wireless device transmits, to a second wireless device, a first message including the capability information elements.