Sidelink Resource Selection After LBT Failure in MCSt Transmission
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Solution Overview
Problem
The increasing demand for enhanced mobile broadband communication and the need for efficient sidelink communication in wireless networks, particularly in V2X scenarios, is challenged by the overhead on base stations due to rapidly growing data traffic and the requirement for improved reliability and reduced latency.
Innovation Solution
A method and device for wireless communication that involves obtaining configuration information for a resource pool, selecting resources for multi-consecutive slots transmission (MCSt), and performing listen-before-talk (LBT) to facilitate sidelink communication, triggering resource selection upon LBT failure or absence of sidelink transmission in available resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station intervention is used for sidelink communication, then communication reliability is improved, but base station overhead increases
Solution Approach 1:
The patent enables UEs to autonomously perform LBT procedures and select transmission resources without base station intervention. The UE independently senses the channel, determines channel availability, and selects resources from the configured resource pool, making the system self-sufficient and reducing base station overhead while maintaining communication reliability
Solution Approach 2:
The base station pre-configures resource pools with multiple candidate resources before sidelink transmission occurs. This preliminary configuration allows UEs to autonomously select from pre-prepared resources, eliminating the need for real-time base station intervention and reducing overhead while ensuring reliable communication through predetermined resource availability
2Productivity
If resource allocation is optimized for multi-consecutive slots transmission, then data transmission efficiency is improved, but resource selection complexity increases
Solution Approach 1:
The patent divides the resource pool into multiple candidate resources across different time slots, allowing the UE to select multiple individual resources for consecutive slot transmission. This segmentation transforms a complex multi-slot allocation problem into simpler individual resource selections, improving transmission efficiency while managing complexity through modular resource choices
Solution Approach 2:
The patent introduces dynamic resource selection where the UE can adaptively choose different resources for each consecutive slot based on LBT outcomes and channel conditions. This dynamic approach allows flexible adjustment of transmission resources, improving overall data transmission efficiency while the UE manages the complexity through autonomous decision-making based on pre-configured options
3Reliability
If LBT is performed for each transmission slot, then channel access reliability is improved, but transmission latency increases
Solution Approach 1:
The patent performs LBT procedures in advance for multiple consecutive slots and caches the results. By conducting channel sensing beforehand and storing the outcomes, the system ensures reliable channel access determination while avoiding repeated LBT executions during transmission, thereby reducing latency while maintaining access reliability
Solution Approach 2:
The patent enables continuous transmission across multiple consecutive slots by performing LBT once and maintaining channel access permission throughout the transmission sequence. This continuous action approach ensures reliable channel access while eliminating repeated LBT delays, allowing uninterrupted data transmission and reducing overall latency
4Quantity of substance
If resource pool size is increased to handle growing data traffic, then communication capacity is improved, but resource management complexity increases
Solution Approach 1:
The patent segments the large resource pool into multiple candidate resources organized by time slots and frequency resources. This segmentation allows the UE to manage and select from numerous resources in a structured manner, increasing overall communication capacity while reducing management complexity through organized resource categorization and incremental selection processes
Data Source
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AI summary
Proposed are a method for a first device to perform wireless communication and a device supporting same. For example, the first device may acquire configuration information related to a resource pool. For example, the first device may select resources for MCSt within the resource pool. For example, the first device may perform LBT for the MCSt. For example, the first device may trigger resource selection on the basis of (i) the LBT failing and (ii) SL transmission not being performed within any resources related to the MCSt.