NR-V2X Reference Signal Determination via Control Channel Scrambling
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Solution Overview
Problem
In Vehicle-to-Everything (V2X) systems, particularly in New Radio (NR)-V2X, there is a need for higher throughput, lower delay, higher reliability, larger coverage, and more flexible resource allocation to support automatic driving, which is challenging due to the determination of the number of reference signals in multi-antenna transmission technologies.
Innovation Solution
A method and apparatus where a first terminal determines and sends a control channel with N reference signals to a second terminal, using scrambling, masking, and encoding operations based on preconfigured or network-configured mapping relationships, allowing the second terminal to determine the number of reference signals via time-division transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-antenna transmission technology is adopted to improve throughput and coverage, then the number of reference signals increases, but the complexity of determining the number of reference signals increases
Solution Approach 1:
The terminal determines the number of reference signals by autonomously sensing and processing the control channel information itself, without requiring network configuration or base station assignment. The terminal uses the scrambling sequence or mask sequence from the control channel to derive the number of reference signals, enabling self-service operation that reduces network overhead and improves determination efficiency
Solution Approach 2:
The patent changes the parameter representation method by using scrambling sequences or mask sequences as carriers for the number of reference signals. Instead of direct indication, the number is encoded through cryptographic parameters that the terminal can process to extract the required information, transforming the determination mechanism from explicit to implicit parameter extraction
2Productivity
If the number of reference signals is increased to improve throughput, then more resources are allocated, but resource conflicts increase
Solution Approach 1:
The terminal performs sensing on the control channel to acquire information about the number of reference signals before transmission. This feedback mechanism allows the terminal to adapt its resource allocation based on current channel conditions and network state, enabling dynamic adjustment that avoids resource conflicts while maintaining high throughput
Solution Approach 2:
The system transitions from static resource allocation to dynamic determination of reference signal numbers. The terminal can flexibly adjust the number of reference signals based on real-time sensing results and channel conditions, allowing the system to adapt to changing traffic demands and reduce resource conflicts through dynamic resource management
3Ease of operation
If explicit indication of reference signal number is used, then determination is simple, but control channel overhead increases
Solution Approach 1:
The control channel serves multiple functions: it carries control information for the physical channel and simultaneously encodes the number of reference signals through scrambling sequences or mask sequences. This multi-functionality allows the control channel to convey additional information without increasing overhead, as the same control channel resources are used for dual purposes
Solution Approach 2:
The scrambling sequence or mask sequence acts as an intermediary that carries the number of reference signals information. Instead of directly indicating the number, the control channel uses these sequences as mediators that encode the information in a compact form, allowing the terminal to extract the number without requiring additional explicit signaling resources
Data Source
AI summary
Disclosed are an information determining method, a device, and a computer storage medium. The method includes: a first terminal determines that the number of first reference signals is N, N being a positive integer; the first terminal transmits to a second terminal a control channel and the N first reference signals, where the control channel is for use by the second terminal in determining that the number of the first parameter signals is the number N so as to receive respectively the N first reference signals via N channels.