Unlicensed Sidelink Resource Pool Alignment for Wideband PSSCH
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing wideband operations on unlicensed sidelinks, particularly in 5G/NR systems, due to the need for improved radio interface efficiency and coverage to handle increasing wireless data traffic and support various vertical applications.
Innovation Solution
A user equipment (UE) determines a SL bandwidth part (BWP) and sets of resource block sets with intra-cell guard bands to align resource pools, enabling the determination of sub-channels for physical SL shared channel transmission after successful channel access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wideband operation is implemented on unlicensed sidelinks, then data transmission capability is improved, but resource management complexity increases
Solution Approach 1:
The patent segments the wideband spectrum into multiple resource block sets (RB-sets), where each RB-set can be independently managed and allocated. This segmentation allows the system to handle wideband operations by breaking down the complex resource management into smaller, more manageable units, thus improving data transmission capability while controlling resource management complexity.
Solution Approach 2:
The patent introduces a new dimension of resource organization by defining resource pools that span across multiple RB-sets and introducing the concept of sub-channels within these pools. This dimensional restructuring enables more flexible and efficient resource allocation in the frequency domain, enhancing throughput while providing structured management for wideband resources.
2Productivity
If resource pools are aligned across RB-sets, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple RB-sets into unified resource pools that can be allocated together as single entities. By combining adjacent RB-sets into resource pools with aligned boundaries, the system achieves more efficient resource allocation while maintaining manageable complexity through standardized pool structures and boundary alignments.
3Reliability
If channel access procedures are implemented, then reliable transmission is achieved, but transmission delay increases
Solution Approach 1:
The patent performs channel access procedures in advance before actual data transmission begins. By completing the channel access procedure and securing transmission rights beforehand, the system ensures reliable transmission while minimizing the delay during the actual data transfer phase, as the access negotiation is already completed.
Data Source
AI summary
Apparatuses and methods for wideband operation on an unlicensed sidelink (SL). A method performed by a user equipment (UE) includes determining a sidelink (SL) bandwidth part (BWP); determining a set of resource block sets (RB-sets) and a set of intra-cell guard bands between the set of RB-sets; and determining, based on the set of RB-sets, a resource pool. A lowest RB of the resource pool is aligned with a lowest RB of a first RB set, and a highest RB of the resource pool is aligned with a highest RB of a second RB set. The method further includes determining, based on the resource pool, a set of sub-channels, determining, based on the set of sub-channels, a transmission of a physical SL shared channel (PSSCH), performing a SL channel access procedure, and performing the transmission of the PSSCH after successfully performing the SL channel access procedure.