V2X Terminal Frame Number Alignment Via Configured Offsets
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication systems, the lack of consistent understanding of radio frame boundaries and numbers among terminal devices due to multiple synchronization sources leads to inconsistent communication quality, particularly in operations requiring accurate frame numbers.
Innovation Solution
A method for terminal devices to determine direct frames for sidelink communication using offsets and frame numbers, enabling consistent understanding and improving communication reliability through accurate frame and subframe determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple synchronization sources are used for sidelink communication, then synchronization coverage is improved, but frame number consistency deteriorates
Solution Approach 1:
The patent introduces an offset value as an intermediary parameter that mediates between the system frame number and the direct frame number. This offset serves as a translation mechanism that allows terminal devices to convert between different frame numbering systems, ensuring consistent understanding despite using multiple synchronization sources. The offset is configured by the network device and enables accurate mapping between system frames and direct frames.
2Adaptability or versatility
If multiple synchronization sources are used, then synchronization flexibility is improved, but communication quality deteriorates
Solution Approach 1:
The patent changes the parameter representation by introducing an offset value that transforms the frame number relationship. Instead of directly comparing system frame numbers with direct frame numbers, the system uses the offset parameter to adjust and align the numbering. This parameter transformation enables terminal devices to accurately determine direct frame numbers while maintaining flexibility in synchronization source selection.
3Reliability
If accurate frame number determination is implemented, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure and indicate the offset value to terminal devices before sidelink communication occurs. This advance provision of the offset parameter eliminates the need for complex real-time calculations during communication. Terminal devices can directly use the provided offset to determine accurate frame numbers without performing complex computations, thus reducing device complexity while maintaining reliability.
Data Source
AI summary
A wireless communication method includes receiving, by a terminal device, first information sent by a network device. The first information includes a first offset. The first offset is a difference between a frame number of a first system frame and a frame number of a first direct frame. The first system frame and the first direct frame overlap in a time domain. The wireless communication method also includes determining, by the terminal device, the first direct frame based on at least one of the first offset or the frame number of the first system frame.