Sidelink Resource Switching for Consecutive LBT Failures
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Solution Overview
Problem
There is a lack of specific rules in existing protocols for handling consistent Listen Before Talk (LBT) failures in sidelink communication scenarios, particularly in unlicensed spectra, which affects the efficient operation of terminal devices.
Innovation Solution
The method involves detecting consistent LBT failures at a resource granularity level, such as RB sets or resource pools, and implementing policies like resource switching to address these failures, including determining a first policy related to consistent LBT failure, and employing a resource switching policy to manage these failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device performs LBT sensing on unlicensed spectrum channels, then the device can transmit signals on idle channels, but the device cannot transmit on busy channels
Solution Approach 1:
The patent segments the LBT failure detection at the resource granularity level (RB set or resource pool level) rather than at the individual channel level. This allows the terminal to identify which specific resource units experienced LBT failures and apply targeted recovery strategies, thereby maintaining overall transmission productivity while improving reliability through localized problem resolution
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device detects and reports LBT failure information to the network side. This feedback enables the network to adjust resource allocation strategies and provide alternative resources, thus improving transmission reliability without significantly impacting productivity
2Ease of operation
If there is no specific rule for consistent LBT failure, then the protocol remains simple, but the terminal device cannot efficiently handle LBT failures in sidelink communication
Solution Approach 1:
The patent introduces local quality by defining specific handling rules for LBT failures at different resource granularity levels. Instead of applying uniform simple rules everywhere, the system applies differentiated strategies based on whether the failure occurs at the RB set level or resource pool level, thereby improving sidelink communication efficiency while maintaining reasonable protocol complexity
Solution Approach 2:
The patent makes the LBT failure handling mechanism dynamic by allowing the terminal to adapt its behavior based on the detected failure conditions and network configurations. The terminal can dynamically switch between different recovery strategies (resource switching, priority-based retransmission, etc.), enhancing communication efficiency without requiring overly complex static rules
3Reliability
If the terminal device switches resources when LBT fails, then the device can maintain communication, but the complexity of resource management increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple resource pools and RB sets with different LBT failure handling policies. The terminal device prepares alternative resources in advance and can quickly switch between them when LBT failures occur, thereby maintaining communication reliability without requiring complex real-time decision-making logic
Solution Approach 2:
The patent manages resource complexity by changing key parameters such as resource granularity level (RB set vs. resource pool), failure detection thresholds, and recovery timing. These parameter adjustments allow the system to achieve reliable communication continuity while keeping the resource management algorithm relatively simple and manageable
Data Source
AI summary
A wireless communication method, a terminal device and a storage medium are provided. The method includes: a terminal device performs a first operation related to consecutive listen before talk (LBT) failures, the detection of the consecutive LBT failures being related to a resource granularity.