Multi-Channel Access Signaling for Unlicensed Wireless Links
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Solution Overview
Problem
Second devices lacking channel access capability cannot determine available channels in unlicensed spectrum, leading to communication failures due to forced channel occupation, especially in scenarios involving zero-power terminals that do not support OFDM modulation.
Innovation Solution
A first device performs channel access on multiple channels to determine a first channel set and sends associated information to a second device, enabling the second device to communicate based on this set, thereby assisting in channel access and reducing collision risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a second device performs channel access to determine available channels, then channel usage fairness is ensured, but the second device cannot determine an available channel when it lacks channel access capability
Solution Approach 1:
The first device acts as an intermediary that performs channel access on behalf of the second device. The first device senses multiple channels, determines available channels, and provides this information to the second device, enabling the second device to communicate without having its own channel access capability
Solution Approach 2:
The first device performs channel access and channel sensing in advance before the second device needs to communicate. By determining the first channel set beforehand and providing this information to the second device, the system eliminates the need for the second device to perform channel access operations
2Productivity
If a second device forces channel occupation without channel access capability, then communication can proceed, but channel collision risk increases
Solution Approach 1:
The first device provides feedback information about channel availability to the second device. By sensing multiple channels and determining which channels are available, the first device gives the second device feedback on which channels to use, thereby avoiding collisions while maintaining communication continuity
Data Source
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AI summary
Provided are a wireless communication method and a communication device. The method comprises: a first device performing channel access on a plurality of channels, so as to determine a first channel set; and the first device sending first information to a second device, wherein the first information is associated with the first channel set. In the embodiments of the present application, a first device can perform channel access on a plurality of channels, so as to determine a first channel set, and send, to a second device, first information associated with the first channel set; and as such, the second device can perform communication on the basis of the first channel set. Therefore, the case in a traditional solution of the second device being unable to acquire an available channel due to the second device lacking a channel access capability is avoided, and an improvement in the possibility of the second device obtaining an available channel is facilitated.