Sidelink Subframe Allocation for V2X Interference Avoidance
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Solution Overview
Problem
In wireless communication systems, particularly in V2X communication, there is a challenge in determining suitable subframes for sidelink transmission that are not interfered with by sidelink synchronization signals or downlink/subspecial subframes, which affects the reliability and efficiency of vehicle-to-everything communication.
Innovation Solution
A method is proposed to determine sidelink subframes by excluding subframes with configured sidelink synchronization signals and downlink/special subframes, and reserving specific subframes for sidelink transmission, ensuring that these reserved subframes are evenly distributed across the total subframe range to avoid interference and ensure periodic V2X communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If subframes are excluded for SLSS resources and downlink/special subframes, then interference is avoided, but the number of available sidelink subframes is reduced
Solution Approach 1:
The patent extracts and excludes specific subframes (those containing SLSS resources and downlink/special subframes) from the total set of subframes to prevent interference. This is achieved by determining the number of excluded subframes and calculating the remaining available subframes for sidelink transmission, thereby ensuring reliable communication while maintaining adequate resource availability.
2Manufacturing precision
If reserved subframes are configured to avoid ambiguity in indexing, then subframe allocation clarity is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring reserved subframes before sidelink transmission occurs. The network device determines the number of reserved subframes based on the total subframes and excluded subframes, then allocates these reserved subframes in advance to UEs. This pre-allocation approach ensures precise subframe indexing and avoids ambiguity during actual transmission, while the systematic calculation method keeps the configuration process manageable.
Data Source
AI summary
Provided are a method for a terminal transmitting a sidelink in a wireless communication system, and a terminal using same. The method comprises: determining at least one sidelink subframe for sidelink transmission from subframes, in a set of all subframes, other than subframes having a sidelink synchronization signal (SLSS) resource configured, and reserved subframes; and transmitting the sidelink using the at least one sidelink subframe.