Sidelink Resource Reservation Across Unlicensed Spectrum RB Sets
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Solution Overview
Problem
Existing sidelink communication technologies face challenges in efficiently allocating and reserving resources for transmissions on unlicensed spectrum, particularly in multiple resource block sets, due to uncertainties in listen-before-talk procedures, which affect channel access and resource utilization.
Innovation Solution
The proposed solution enhances sidelink resource allocation and reservation methods by introducing new fields in legacy sidelink control information formats and introducing new SCI formats to indicate resource assignments for contiguous, noncontiguous, and misaligned RB sets, ensuring efficient and reliable sidelink transmissions on unlicensed spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If listen-before-talk procedure is used for channel access in unlicensed spectrum, then channel access reliability is improved, but transmission resource utilization deteriorates due to access uncertainties
Solution Approach 1:
The patent performs sensing and channel assessment actions before attempting transmission to determine if the channel is available. This preliminary action allows the system to prepare transmission resources in advance while accounting for potential channel access failures, thereby resolving the contradiction between ensuring reliable channel access through listen-before-talk and maintaining efficient resource utilization.
2Productivity
If resource allocation is optimized for licensed spectrum, then transmission efficiency is improved, but adaptability to unlicensed spectrum conditions deteriorates
Solution Approach 1:
The patent applies different resource allocation and sensing strategies tailored to specific unlicensed spectrum conditions and transmission scenarios. By customizing the approach for local unlicensed spectrum characteristics rather than applying licensed spectrum methods universally, the system achieves both transmission efficiency and adaptability to unlicensed spectrum conditions.
3Ease of manufacture
If sidelink resource allocation follows traditional methods, then implementation simplicity is maintained, but resource utilization efficiency in unlicensed spectrum deteriorates
Solution Approach 1:
The patent divides the unlicensed spectrum into multiple resource blocks and implements segmented sensing and resource selection procedures. This segmentation allows the system to efficiently manage multiple resource blocks while maintaining relatively simple implementation by reusing existing sidelink frameworks with minimal modifications.
Data Source
AI summary
Example embodiments of the present disclosure relate to resource indication/reservation for flexible and reliable sidelink transmission. A first terminal device senses a plurality of spectrum sections to be idle for at least one sidelink transmission between the first terminal device and a second terminal device in an unlicensed spectrum; and transmits, to the second terminal device, information indicating the plurality of spectrum sections for a resource allcoation. Through this solution, several enhancements related to resource indication/reservation for flexible and reliable sidelink transmissions on unlicensed spectrum are provided.