Sidelink Synchronization Block Interlaced Mapping for Unlicensed OCB
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Solution Overview
Problem
Existing wireless communication systems face challenges in satisfying the occupied channel bandwidth (OCB) requirement for sidelink synchronization signals and physical sidelink broadcast channel blocks (S-SS/PSBCH) when operating in unlicensed spectrum.
Innovation Solution
The proposed solution involves a new sidelink SS/PSBCH block structure that includes determining a subcarrier spacing, determining a set of interlaced resource blocks with a uniform interval, and mapping the S-SS/PSBCH block to these interlaced resource blocks, thereby enhancing the OCB compliance in unlicensed spectrum operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional S-SS/PSBCH block structure is used, then the block can be transmitted with simple resource allocation, but the occupied channel bandwidth requirement for unlicensed spectrum operation cannot be satisfied
Solution Approach 1:
The S-SS/PSBCH block is segmented and mapped to interlaced resource blocks rather than contiguous RBs. The processor determines a set of interlaced RBs with uniform interval k and maps the S-SS/PSBCH block to these distributed RBs, which scatter the transmission across the channel bandwidth to satisfy OCB requirements for unlicensed spectrum operation.
Solution Approach 2:
The patent changes the resource allocation parameter from contiguous RB indexing to interlaced RB indexing with uniform interval k. This parameter transformation enables the block to meet regulatory OCB requirements while maintaining transmission reliability, resolving the contradiction between compliance and structural simplicity.
2Reliability
If interlaced resource blocks are used to meet OCB requirement, then compliance with unlicensed spectrum regulations is improved, but the complexity of determining and mapping the block increases
Solution Approach 1:
The processor performs preliminary determination of the subcarrier spacing and identification of the set of interlaced resource blocks before mapping. By pre-determining these parameters and using uniform interval k, the system simplifies the overall mapping process while ensuring OCB compliance, making the complexity manageable through structured preparation.
Data Source
AI summary
Methods and apparatuses for a sidelink synchronization signals and physical sidelink broadcast channel block (S-SS/PSBCH) block structure for unlicensed operation. A method of a user equipment (UE) in a wireless communication system includes determining a subcarrier spacing (SCS) of a sidelink synchronization signals and physical sidelink broadcast channel (S-SS/PSBCH) block; determining a set of interlaced resource blocks (RBs). The set of interlaced RBs includes RBs with a uniform interval k. The method further includes mapping the S-SS/PSBCH block to the set of interlaced RBs and transmitting, to another UE, the S-SS/PSBCH block over a sidelink channel.