Sidelink Reference Signal Resource Determination in V2X
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Solution Overview
Problem
In Vehicle to Everything (V2X) systems, the complexity of detecting sidelink reference signals and the resulting signaling overhead pose challenges for improving throughput and resource allocation.
Innovation Solution
A method where a first terminal device determines the transmission resource of a sidelink reference signal based on the transmission resource of a sidelink channel sent by a second terminal device, allowing implicit indication of the sidelink reference signal's transmission resource, thereby reducing complexity and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If explicit signaling is used to indicate sidelink reference signal transmission resources, then detection accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent combines the indication of sidelink reference signal transmission resources with the sidelink control information already being transmitted for scheduling. By merging these indications into existing control signaling structures, the patent avoids additional dedicated signaling while ensuring accurate resource indication for reference signal detection.
Solution Approach 2:
The sidelink control information is designed to serve multiple functions simultaneously: scheduling sidelink data transmission and indicating reference signal transmission resources. This multi-functionality reduces the need for separate dedicated signaling channels while maintaining comprehensive control capabilities.
2Adaptability or versatility
If separate signaling is used to indicate sidelink reference signal resources, then resource allocation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent merges resource indication functionality into existing control signaling, allowing flexible resource allocation through unified signaling management. This approach maintains adaptability while reducing device complexity by eliminating the need for separate processing of dedicated reference signal indication signaling.
3Loss of information
If implicit indication is used for sidelink reference signal resources, then signaling overhead is reduced, but detection precision may worsen
Solution Approach 1:
The patent combines implicit resource indication with explicit scheduling information in a unified control signaling approach. This hybrid method reduces signaling overhead by leveraging existing control structures while maintaining sufficient detection precision through integrated resource allocation information.
Data Source
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AI summary
Disclosed are a sidelink communication method and a terminal device. The method comprises: a first terminal device receives a sidelink channel sent by a second terminal device; and the first terminal device determines a transmission resource of a sidelink reference signal according to a transmission resource of the sidelink channel. According to the method and the terminal device of embodiments of the present application, signaling overheads are benefited to reduce, and the complexity of detecting the sidelink reference signal is also reduced.