Sidelink RB Set Switching for Consistent LBT Failure Recovery
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Solution Overview
Problem
The challenge of processing consistent listen before talk failures in sidelink unlicensed (SL-U) communication systems, particularly when a terminal experiences a consistent LBT failure on a Resource Block Set (RB set), is addressed to ensure smooth data transmission and reception.
Innovation Solution
The method involves selecting a second resource block set from those that do not experience consistent listen before talk failure, performing listen before talk failure recovery, triggering resource pool reselection, or initiating sidelink interface radio link failure when necessary, and reporting relevant information to the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal triggers resource pool reselection when experiencing consistent LBT failure, then the terminal can potentially recover data transmission, but the complexity of resource management increases
Solution Approach 1:
The patent segments the resource pool into multiple resource block sets (RB sets) and applies different LBT failure processing strategies to different segments. When LBT failure occurs on one RB set, the terminal can switch to another RB set within the same resource pool, avoiding the need for complete resource pool reselection and reducing management complexity while maintaining transmission reliability.
Solution Approach 2:
The patent introduces dynamic switching between different LBT failure processing modes (intra-pool RB set switching vs. inter-pool reselection) based on the specific failure scenario. This dynamic approach allows the system to adapt to different conditions, optimizing between reliability and complexity by selecting the appropriate recovery strategy for each situation.
2Reliability
If the terminal performs LBT failure recovery on a second resource block set, then data transmission can be maintained, but the time required for failure processing increases
Solution Approach 1:
The patent performs preliminary configuration of multiple resource block sets and establishes backup resources in advance. When LBT failure occurs, the terminal can immediately switch to a pre-configured second RB set without extensive search or configuration time, thus maintaining transmission continuity while minimizing the time loss associated with failure recovery.
3Loss of information
If the terminal triggers sidelink interface radio link failure, then the network can be notified of the failure condition, but the interruption of data transmission increases
Solution Approach 1:
The patent applies partial action by first attempting less severe recovery measures (intra-pool RB set switching) before escalating to complete radio link failure. This staged approach allows the terminal to report failure information progressively, notifying the network only when necessary, while minimizing transmission interruption by exhausting lighter recovery options first.
Data Source
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AI summary
The present disclosure provides a method, device and terminal for processing a consistent listen before talk failure, relating to the field of communication technologies. The method is performed by a terminal, and comprises: performing a first operation when a first resource block set of a sidelink interface experiences the consistent listen before talk failure, wherein the first operation comprises at least one of the following: if there are resource block sets in a first resource pool to which the first resource block set belongs that do not experience the consistent listen before talk failure, selecting a second resource block set from the resource block sets that do not experience the consistent listen before talk failure, and performing listen before talk failure recovery on the second resource block set; triggering resource pool reselection; triggering a sidelink interface listen before talk failure media access control control element; triggering a sidelink interface radio link failure.