Sidelink Guard Interval Allocation for LBT Failure Recovery
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Solution Overview
Problem
Existing communication systems face inefficiencies in utilizing resources in unlicensed bands due to LBT failures, leading to reduced communication efficiency and increased latency in sidelink communications.
Innovation Solution
A communication apparatus and method that allocates a guard interval in consecutive time resources and transmits signals with these resources, allowing for resource re-allocation and selection in case of LBT failures, thereby improving resource utilization efficiency in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If guard interval is configured in n-th time resource and n+1-th time resource, then resource utilization efficiency is improved, but transmission time is increased
Solution Approach 1:
The patent applies preliminary action by pre-configuring the guard interval in the n-th time resource before the actual data transmission begins. This allows the system to prepare the necessary time separation advance, ensuring that when transmission occurs, the guard interval is already in place to prevent interference with the n+1-th time resource, thereby improving resource utilization without requiring additional time during transmission.
Solution Approach 2:
The patent segments the time resources into distinct n-th time resource and n+1-th time resource with the guard interval positioned between them. This segmentation allows independent optimization of each time slot for data transmission while maintaining the guard interval as a separate functional element, enabling efficient resource allocation without proportionally increasing total transmission time.
2Reliability
If LBT failure occurs in unlicensed band, then communication reliability is reduced, but resource allocation becomes inefficient
Solution Approach 1:
The patent implements feedback mechanisms that monitor LBT outcomes and provide information about channel availability to the communication apparatus. This feedback allows the system to adjust its resource allocation strategy based on actual channel conditions, reducing the impact of LBT failures by learning from previous attempts and adapting future transmissions to improve both reliability and resource utilization efficiency.
Solution Approach 2:
The patent applies dynamics by making the guard interval configuration adaptive rather than fixed. The system dynamically adjusts the guard interval duration and positioning based on real-time LBT results and channel conditions, allowing the communication apparatus to optimize resource allocation in response to changing network environments and reduce the negative impact of LBT failures.
Data Source
AI summary
This communication device comprises: a control circuit that allocates a signal to a guard section that is set to an Nth time resource, among the Nth time resource and an N+1th time resource that are included in a plurality of time resources, when a plurality of contiguous time resources are allocated in terminal-to-terminal communication in an unlicensed band; and a transmission circuit that transmits the signal in the plurality of time resources.