Sidelink S-SSB Multiplexing for NR-U Occupancy Bandwidth Compliance
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Solution Overview
Problem
Sidelink synchronization signal blocks (S-SSB) transmissions in unlicensed spectrum do not meet the occupancy channel bandwidth (OCB) requirements, leading to potential compliance issues.
Innovation Solution
Multiplexing S-SSB transmissions with physical sidelink control and shared channels (PSCCH/PSSCH) using frequency-interlaced or subchannel-based configurations to satisfy OCB requirements, allowing S-SSB transmissions to comply with unlicensed band regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If S-SSB transmissions are performed alone in unlicensed spectrum, then synchronization function is provided, but occupancy channel bandwidth (OCB) requirements are not met
Solution Approach 1:
The patent combines S-SSB transmissions with PSCCH/PSSCH transmissions in the same time-frequency resources. The S-SSB includes synchronization signals (PSS, SSS) and physical broadcast channel (PBCH), while PSCCH carries control information and PSSCH carries data. By merging these transmissions, the system simultaneously provides synchronization functionality and meets OCB requirements in unlicensed spectrum.
Solution Approach 2:
The S-SSB transmission structure is designed to serve multiple functions: synchronization (through PSS/SSS), system information broadcasting (through PBCH), and OCB requirement fulfillment (through combined PSCCH/PSSCH transmissions). This multi-functional design allows a single transmission to address multiple technical requirements simultaneously.
2Stability of the object's composition
If S-SSB transmissions are performed alone in unlicensed spectrum, then synchronization signal structure is maintained, but channel efficiency decreases due to potential collisions
Solution Approach 1:
The patent merges S-SSB with PSCCH/PSSCH transmissions to utilize channel resources more efficiently. By combining these transmissions, the system reduces the likelihood of collisions with other signals and improves overall channel efficiency while maintaining the core synchronization signal structure intact.
Solution Approach 2:
The patent introduces dynamic resource allocation and multiplexing configurations that allow the system to adapt transmission parameters based on channel conditions. This dynamic approach optimizes channel efficiency by adjusting resource allocation patterns while preserving the essential synchronization signal structure.
3Productivity
If multiplexing configuration is introduced for S-SSB with PSCCH/PSSCH, then OCB requirements are met, but device complexity increases
Solution Approach 1:
The patent segments the multiplexing configuration into manageable components, including resource allocation parameters, time-frequency resource definitions, and multiplexing pattern configurations. This segmentation allows the complex multiplexing functionality to be implemented through modular configuration elements, reducing overall system complexity.
Solution Approach 2:
The patent employs parameter-based configuration where multiplexing behavior is controlled by adjustable parameters such as resource allocation patterns, time offsets, and frequency shifts. By changing these parameters, the system can adapt to different OCB requirements without redesigning the entire multiplexing architecture.
4Productivity
If frequency-interlaced waveform or subchannel-based approach is used for multiplexing, then channel usage is optimized, but transmission complexity increases
Solution Approach 1:
The patent divides the frequency spectrum into interlaced subchannels or resource blocks, allowing S-SSB and PSCCH/PSSCH transmissions to be distributed across different frequency segments. This segmentation enables efficient channel usage through frequency diversity while maintaining manageable transmission complexity through structured resource allocation.
Data Source
AI summary
Wireless communications systems and methods related to multiplexing a sidelink-synchronization signal block (S-SSB) transmission with a physical sidelink control channel (PSCCH)/physical sidelink shared channel (PSSCH) transmission for occupancy channel bandwidth (OCB) fulfilment are provided. A user equipment (UE) determines a multiplex configuration for multiplexing a sidelink transmission with a S-SSB transmission in a sidelink bandwidth part (BWP). The UE communicates, in the sidelink BWP during a sidelink slot, the S-SSB transmission. The UE communicates, in the sidelink BWP during the sidelink slot, the sidelink transmission, where the S-SSB transmission and the sidelink transmission are communicated by multiplexing the sidelink transmission and the S-SSB transmission based on the multiplex configuration.