RTS to Group Mechanism for Wireless Spatial Reuse
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting a large number of devices in dense deployments without interference, as existing technologies do not provide adequate means for efficient and effective communication in such scenarios.
Innovation Solution
The implementation of a request to send (RTS) to group mechanism within wireless communication systems, which allows for spatial reuse by modulating RTS frames in different sub-channels and receiving clear to send (CTS) responses, enabling concurrent data transmissions based on specific parameters and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication protocols are used in dense deployments, then device connectivity is maintained, but interference increases and communication efficiency deteriorates
Solution Approach 1:
The patent segments the wireless communication channel into multiple sub-channels and implements group-based RTS/CTS mechanisms. Devices are organized into groups that can independently access different sub-channels, dividing the congested medium into manageable segments that reduce interference and improve overall communication efficiency in dense deployments.
Solution Approach 2:
The patent introduces spatial dimensionality by implementing spatial reuse through multiple sub-channels and group-based access mechanisms. This allows simultaneous transmissions in different spatial dimensions (sub-channels) without mutual interference, effectively adding a dimensional layer to resolve the interference problem in dense environments.
2Quantity of substance
If more devices are deployed in a given area, then network coverage is improved, but channel access efficiency deteriorates due to increased contention
Solution Approach 1:
The patent merges multiple device requests into group-based RTS frames, where a single RTS can represent multiple devices' channel access requests. This consolidation reduces the number of individual contention events, thereby reducing total channel access time while supporting a larger number of devices in the network.
Solution Approach 2:
The patent implements preliminary channel reservation through RTS/CTS exchange before actual data transmission. By securing channel access rights in advance through the CTS response, devices can plan their transmissions without last-minute contention, reducing idle time and improving channel access efficiency for large numbers of devices.
3Productivity
If RTS frames are transmitted to individual devices, then channel access control is precise, but overhead increases and efficiency decreases
Solution Approach 1:
The patent combines multiple individual RTS frames into a single group-based RTS frame that can address multiple devices simultaneously. This merging reduces the total number of RTS/CTS exchanges required, thereby reducing protocol overhead and improving channel access efficiency while maintaining precise control through group addressing mechanisms.
Solution Approach 2:
The patent creates a universal group-based RTS frame structure that can serve multiple functions: addressing individual devices, addressing groups of devices, and reserving channels for multiple transmissions. This multi-functional approach reduces the need for separate protocol mechanisms, lowering overall overhead while maintaining control precision.
Data Source
AI summary
A wireless communication device (alternatively, device) includes a processing circuitry configured to support communications with other wireless communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processing circuitry, among other possible circuitries, components, elements, etc. to support communications with other wireless communication device(s) and to generate and process signals for such communications. A device generates and transmits a request to send (RTS) to group (RTG) frame to other devices. In response to the RTG frame, the device receives clear to send (CTS)(s) from one or more of the other devices and generates and transmits an orthogonal frequency division multiple access (OFDMA) data frame to those one or more of the other devices based thereon. The RTG frame can include different RTSs transmitted via different channels, sub-channels, sub-carriers, etc. to the different other devices.