Sidelink Resource Pool Synchronization Without PSBCH Decoding
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Solution Overview
Problem
In scenarios where sensing UEs have limited functional modules, such as in home or industrial applications, they cannot synchronize with communication UEs due to the absence of channel encoding and demodulation modules, leading to inconsistent resource pool locations and potential conflicts.
Innovation Solution
UEs determine resource pool positions based on indices of sidelink synchronization signals, using existing S-SSS and/or S-PSS sequences, eliminating the need for PSBCH parsing and reducing resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sensing UEs use simple radar sensing modules without channel encoding and decoding modules, then costs are limited, but synchronization with communication UEs cannot be implemented
Solution Approach 1:
The patent extracts the synchronization function from the PSBCH channel parsing requirement and implements it through S-SSS sequence-based index determination. This allows sensing UEs with simple radar modules to achieve synchronization without needing complex channel encoding and decoding capabilities, thereby resolving the contradiction between cost limitation and synchronization reliability
Solution Approach 2:
The patent introduces the S-SSS sequence as an intermediary element that carries synchronization information. Instead of requiring direct PSBCH parsing which needs complex modules, the S-SSS sequence serves as a mediator that simple sensing UEs can detect and interpret to determine resource pool locations, enabling synchronization without full communication module functionality
2Device complexity
If sensing UEs cannot parse PSBCH, then functional modules are simplified, but resource pool location determination becomes inconsistent
Solution Approach 1:
The patent changes the parameter used for resource pool location determination from PSBCH-based frame number and slot index to S-SSS sequence-based index. This parameter change enables simple sensing UEs to determine resource pool locations consistently with communication UEs without requiring complex channel decoding, thus resolving the contradiction between device complexity and location determination precision
3Adaptability or versatility
If different types of UEs use different synchronization methods, then each UE type can optimize its function, but resource conflicts occur
Solution Approach 1:
The patent makes the S-SSS sequence-based synchronization method universal, applicable to both sensing UEs and communication UEs. This unified approach allows different UE types to optimize their specific functions while using a common synchronization mechanism, thereby preventing resource conflicts and resolving the contradiction between adaptability and resource coordination
Data Source
AI summary
A resource pool determining method and an apparatus. A first terminal device receives a first sidelink synchronization signal in a first time domain unit. The first terminal device determines a time domain position of a first resource pool based on the index of the first sidelink synchronization signal. The index of the first sidelink synchronization signal is determined based on the first sequence included in the first sidelink synchronization signal, and both a terminal device of a sensing type and a terminal device of a communication type can identify the first sequence. In this way, terminal devices may not need to implement synchronization based on a PSBCH. A different type of terminal device does not mistakenly use a resource in a resource pool configured for another type of terminal device. This reduces a probability of a resource conflict.