Sidelink Unlicensed Frequency Resource Allocation Granularity
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Solution Overview
Problem
Current sidelink (SL) technologies face challenges in meeting the increasing demands for transmission bandwidth, communication rate, communication delay, reliability, expandability, and diverse application scenarios, particularly when relying solely on licensed spectrums.
Innovation Solution
The implementation of a sidelink technology for unlicensed frequency bands (SL-U) that uses a frequency domain resource allocation granularity of sub-channels or interlaced resource blocks (IRBs) to indicate resource allocation, ensuring that each transmission occupies 80% of the bandwidth of a Listen Before Talk (LBT) sub-band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If sidelink technology relies solely on licensed spectrums, then network control and service quality are ensured, but transmission bandwidth and communication rate requirements cannot be satisfied
Solution Approach 1:
The patent segments the frequency domain resources into sub-channels and interlaced resource blocks (IRBs), allowing flexible allocation and combination of these segmented units to meet diverse bandwidth requirements of different application scenarios
Solution Approach 2:
The patent introduces dynamic resource allocation mechanisms where the frequency domain resource allocation granularity can be dynamically adjusted between sub-channel and IRB based on channel conditions, traffic patterns, and service requirements, enabling the system to adapt to varying application scenarios
2Productivity
If frequency domain resource allocation uses fine granularity, then resource utilization rate improves, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies partial action by allocating resources at different granularities for different purposes: fine-grained IRB allocation for high utilization in specific scenarios, and coarser sub-channel allocation for other cases, avoiding the need to always use the finest granularity which would increase complexity unnecessarily
Solution Approach 2:
The patent changes the allocation granularity parameter dynamically between sub-channel and IRB based on system state and service requirements, allowing the system to optimize between resource utilization and processing complexity by selecting the appropriate granularity level for each situation
Data Source
AI summary
A method for indicating resource allocation is disclosed. The method is applied to a sidelink-unlicensed frequency band and is performed by a network device. The method includes: determining a frequency domain resource allocation granularity, wherein the frequency domain resource allocation granularity is a sub-channel or an interlaced resource block (IRB); and sending downlink control information to a terminal device based on the frequency domain resource allocation granularity, wherein the downlink control information comprises a frequency domain resource allocation indication domain, and the frequency domain resource allocation indication domain is configured to indicate a frequency domain resource allocated to the terminal device.