Multi-Channel Relay Access for Zero-Power Spectrum Sharing
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Solution Overview
Problem
Zero power devices lack channel access capability, making it challenging for them to communicate on unlicensed spectra while reducing conflict and interference with other devices.
Innovation Solution
A wireless communication method that enables a first device to perform channel access on multiple channels to obtain time domain resources for a second device, allowing zero power terminals to communicate on unlicensed spectra by sharing channels and reducing conflicts through a relay function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If zero power devices are deployed on unlicensed spectrum, then communication coverage and device density are improved, but channel access capability is lacking and conflict/interference with other devices increases
Solution Approach 1:
A first device with channel access capability acts as an intermediary to perform channel access procedures on behalf of the second zero power device. The first device obtains channel access information and transmits it to the second device, enabling the zero power device to communicate without having its own channel access capability, thus reducing direct conflict while maintaining communication functionality
Solution Approach 2:
The channel access function is segmented between two devices: the first device performs the complex channel access procedures (listening before talking, random backoff), while the second zero power device only needs to receive and execute simple transmission commands. This segmentation allows the zero power device to participate in unlicensed spectrum communication without bearing the full complexity of channel access
2Adaptability or versatility
If channel access capability is provided to zero power devices, then communication independence is improved, but device complexity and cost increase
Solution Approach 1:
Instead of equipping each zero power device with complex channel access capabilities, the system uses a first device as an intermediary that handles all channel access functions. The second device only needs simple receiving and transmission capabilities, maintaining communication independence while avoiding the complexity of implementing full channel access mechanisms
Solution Approach 2:
The first device serves multiple functions: it performs channel access procedures, obtains channel information, transmits control signals to the second device, and manages the communication session. This multi-functionality consolidates what would otherwise require separate components in each device, reducing overall system complexity
3Productivity
If multiple channels are accessed simultaneously, then time domain resource utilization is improved, but channel management complexity increases
Solution Approach 1:
The channel management complexity is segmented by having the first device handle all multi-channel access coordination centrally. The first device obtains channel access information for multiple channels simultaneously and transmits appropriate control information to the second device for each channel, simplifying the second device's task while maintaining efficient resource utilization across multiple channels
Data Source
AI summary
A wireless communication method applied to a first device includes: obtaining, through channel access of multiple channels, at least one time domain resource on at least one channel in the multiple channels, where the at least one time domain resource includes a target time domain resource corresponding to a second device.