COT Shared Bandwidth Signaling in Unlicensed RF Spectrum
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Solution Overview
Problem
Existing wireless communication systems face challenges in determining the optimal bandwidth for channel occupancy time sharing, particularly in unlicensed RF spectra, leading to inefficiencies in resource allocation and utilization among devices.
Innovation Solution
A method for determining the shared bandwidth for channel occupancy time (COT) sharing, where a responder device determines the amount of bandwidth to use based on implicit or explicit information from an initiator device, allowing for efficient resource allocation and utilization during COT.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed bandwidth is allocated for channel occupancy time sharing in unlicensed RF spectra, then resource allocation is simplified and device compatibility is improved, but resource utilization efficiency deteriorates and bandwidth waste increases
Solution Approach 1:
The initiator device performs clear channel assessment (CCA) and determines the available bandwidth before initiating COT sharing. By performing this action in advance, the responder device can simply receive the bandwidth information from the initiator without needing to perform complex independent bandwidth determination, thus improving resource utilization while keeping the responder's device complexity low.
Solution Approach 2:
The initiator device acts as an intermediary that performs CCA on behalf of both devices and communicates the determined bandwidth to the responder. This intermediary approach allows the system to achieve efficient bandwidth utilization through the initiator's preliminary assessment while the responder benefits from simplified operation by simply using the provided bandwidth information.
2Adaptability or versatility
If each device independently determines bandwidth for COT sharing, then resource allocation flexibility is improved, but coordination overhead increases and conflicts in unlicensed spectra worsen
Solution Approach 1:
The CCA function and bandwidth determination are merged into a single action performed by the initiator device. Instead of each device independently performing CCA and determining bandwidth, the initiator performs these functions once and shares the results with the responder, reducing coordination overhead and preventing spectral conflicts while maintaining allocation flexibility.
Solution Approach 2:
The initiator device provides feedback to the responder device about the determined bandwidth through signaling. This feedback mechanism ensures both devices operate on the same bandwidth understanding, preventing conflicts in unlicensed spectra while allowing flexible bandwidth allocation based on the initiator's CCA results.
3Productivity
If bandwidth is not explicitly determined before COT sharing, then device operation simplicity is maintained, but resource allocation efficiency deteriorates and bandwidth waste increases
Solution Approach 1:
The initiator device performs bandwidth determination through CCA before COT sharing begins. This preliminary action ensures efficient bandwidth utilization is achieved while the responder device maintains operational simplicity by receiving and using the pre-determined bandwidth information without needing to perform complex independent determination.
Data Source
AI summary
Aspects relate to the amount of shared bandwidth to be used for channel occupancy time (COT) sharing. An initiator device may use a clear channel assessment procedure to gain access to wireless communication resources for a COT that will be shared between the initiator device and a responder device. In some examples, the responder device may determine the shared bandwidth based on information that is implicit in a transmission from the initiator device. For example, the responder device may determine the shared bandwidth based at least in part on a bandwidth of a transmission from the initiator device.