Sidelink LBT Sensing for Resource Block Failure Recovery
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing consistent listen-before-talk (LBT) failures for sidelink communications, leading to inefficient resource selection and potential network overhead due to the lack of clear guidelines for LBT type and quantity of operations.
Innovation Solution
The proposed solution involves transmitting an indication from the medium access control (MAC) layer to the physical (PHY) layer to perform LBT sensing for resource block sets associated with consistent LBT failures, allowing LBT sensing for sidelink communications without data transmission, and receiving the sensing results, thereby enabling efficient sidelink consistent LBT failure recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LBT sensing is performed without data transmission for resource block sets associated with consistent LBT failures, then sidelink communication recovery efficiency is improved, but network overhead increases due to additional sensing operations
Solution Approach 1:
The MAC layer transmits an indication to the PHY layer to perform LBT sensing operations in advance for resource block sets that have experienced consistent LBT failures, before attempting data transmission. This preliminary sensing action allows the system to identify available resources ahead of time, improving recovery efficiency without requiring reactive retransmissions.
Solution Approach 2:
The patent introduces an intermediary indication signal from the MAC layer to the PHY layer that triggers targeted LBT sensing operations. This intermediary mechanism coordinates the sensing activity, allowing the system to perform necessary LBT operations while managing overall network overhead through controlled and purposeful sensing rather than exhaustive monitoring.
2Reliability
If targeted LBT sensing is performed for specific resource block sets, then resource block availability is improved, but device complexity increases due to additional layer interactions
Solution Approach 1:
The patent segments the LBT sensing process by applying it specifically to resource block sets that have experienced consistent failures, rather than requiring universal sensing across all resource blocks. This segmentation allows targeted improvement in resource block availability while limiting the scope of additional operations to only where needed, thereby controlling device complexity.
Solution Approach 2:
The indication from the MAC layer to perform LBT sensing is applied locally to specific resource block sets associated with consistent LBT failures, rather than uniformly across all resources. This local quality approach ensures that additional sensing operations are concentrated where they provide the most benefit, improving resource availability in problematic areas without unnecessarily increasing device complexity system-wide.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. Some aspects more specifically relate to consistent listen-before-talk (LBT) failure recovery for sidelink communications. In some aspects, a medium access control (MAC) layer may transmit, and a physical (PHY) layer may receive, an indication to perform LBT sensing for one or more resource block sets associated with a consistent LBT failure. The indication to perform LBT sensing may be an indication to perform LBT sensing for sidelink communications without transmitting data. The PHY layer may transmit, and the MAC layer may receive, a result of the LBT sensing. In some aspects, the indication to perform the LBT sensing may be an indication to perform Type 1 LBT sensing or an indication to perform Type 2 LBT sensing, and/or may indicate a quantity of LBT sensing operations to be performed.