Sidelink SCI Layer Signaling for Reliable 5G V2X Transmission
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Solution Overview
Problem
Existing sidelink communication systems lack effective methods for configuring and signaling information elements required for the transmission of sidelink data, particularly in 5G communication systems, which hampers efficient Vehicle-to-Everything (V2X) communications.
Innovation Solution
A method for generating and transmitting sidelink control information (SCI) that includes information indicating the number of layers and transmission schemes for sidelink data, allowing communication to be performed through one or more layers as specified by the SCI, with support from base station tables for layer and scheme configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink data is transmitted using multiple layers, then transmission reliability and data rate are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the layer configuration into two distinct SCI stages. First stage SCI indicates the number of layers (1 or 2) and transmission scheme, while second stage SCI provides additional transmission parameters. This segmentation allows the receiving terminal to first determine the basic layer structure from first stage SCI, then optionally access second stage SCI for detailed configuration, reducing overall complexity while supporting multi-layer transmission.
Solution Approach 2:
The patent enables dynamic adaptation of layer configuration through SCI signaling. The transmitting terminal can dynamically select between 1-layer and 2-layer transmission based on channel conditions and traffic requirements, indicated through the layer indication field in SCI. The receiving terminal dynamically adjusts its processing based on the received indication, allowing the system to optimize between reliability and complexity in real-time.
2Manufacturing precision
If detailed transmission scheme information is signaled, then transmission precision is improved, but signaling overhead increases
Solution Approach 1:
The patent segments transmission scheme information across two SCI stages. First stage SCI contains essential layer indication (1 or 2 layers) and basic transmission scheme type. Second stage SCI contains detailed transmission parameters such as MCS, redundancy version, and resource allocation. This segmentation ensures that critical information is always available while detailed information is provided only when needed, balancing precision and overhead.
Solution Approach 2:
The patent uses parameter changes in the SCI structure to convey transmission scheme information efficiently. The layer indication parameter in first stage SCI changes between values indicating 1-layer or 2-layer transmission. Based on this indication, the receiving terminal determines whether to expect detailed parameters in second stage SCI, allowing the system to adapt the signaling overhead to the actual transmission requirements.
Data Source
AI summary
Disclosed are a method and an apparatus for transmitting and receiving sidelink data in a communication system. Then operation method of a first terminal includes generating a first stage SCI including first information indicating a number of layers for transmission of sidelink data and transmitting the first stage SCI to a second terminal. The sidelink data is then transmitted to the second terminal through one or more layers indicated by the first information included in the first stage SCI.