Shared-Slot LBT Selection for Efficient Sidelink Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing multiple transmission opportunities across different listen-before-talk (LBT) sub-bands, which can lead to inefficiencies and interference in wireless networks.
Innovation Solution
A user equipment (UE) performs listen-before-talk (LBT) for multiple transmission opportunities across different LBT sub-bands within a shared slot and transmits sidelink communications based on the LBT results, enabling efficient resource utilization and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmission opportunities are used across different LBT sub-bands, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent divides the frequency spectrum into multiple LBT sub-bands (e.g., first LBT sub-band, second LBT sub-band) within a shared slot, allowing independent LBT procedures and transmission opportunities in each sub-band. This segmentation enables the system to exploit frequency diversity and improve resource utilization by transmitting in available sub-bands while avoiding congested ones, thereby resolving the contradiction between efficiency and complexity through structured frequency division.
Solution Approach 2:
The patent implements dynamic selection of transmission opportunities based on LBT results in different sub-bands. The UE can adaptively choose which sub-band to transmit in based on real-time channel conditions and LBT outcomes, enabling flexible resource allocation that improves efficiency while managing complexity through adaptive rather than static resource assignment.
2Object-affected harmful factors
If LBT is performed for multiple transmission opportunities in different sub-bands, then interference is reduced, but processing time increases
Solution Approach 1:
The patent performs LBT procedures in advance for multiple transmission opportunities across different LBT sub-bands before actual data transmission. By conducting preliminary LBT assessments in each sub-band, the system identifies available transmission opportunities ahead of time, reducing interference through proactive channel assessment while managing processing time through efficient pre-scheduling of transmission resources.
Solution Approach 2:
The patent enables continuous transmission opportunities across multiple LBT sub-bands within a shared slot, ensuring that if one sub-band becomes available through successful LBT, transmission can proceed without interruption. This continuity approach minimizes idle time and reduces overall processing delays while maintaining interference reduction through selective sub-band usage.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform listen-before-talk (LBT) for a plurality of transmission opportunities that are associated with different LBT sub-bands and that share a slot. The UE may transmit at least one sidelink communication using at least one of the plurality of transmission opportunities based at least in part on a result of performing the LBT. Numerous other aspects are described.