MU Short Feedback Response in Wireless Communications
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively utilizing bandwidth and maximizing access for all devices in dense deployments, as prior technologies struggle to efficiently manage communication medium usage in multiple-user, multiple-input-multiple-output (MIMO) environments.
Innovation Solution
The implementation of a novel signaling mechanism that uses orthogonal frequency division multiple access (OFDMA) with trigger frames and feedback responses, allowing for efficient communication without preambles and channel estimation, by configuring wireless communication devices to transmit feedback responses within specific resource units based on agreed-upon parameters, enabling simultaneous feedback from multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication protocols are used with preambles and channel estimation, then communication reliability is maintained, but bandwidth efficiency deteriorates and latency increases
Solution Approach 1:
The patent extracts and removes the preamble and channel estimation components from the wireless communication protocol. By taking out these traditional elements that consume bandwidth and time, the system achieves shorter feedback responses and improved bandwidth efficiency while maintaining communication functionality through alternative signaling mechanisms
Solution Approach 2:
The patent applies preliminary action by pre-configuring resource units and feedback signaling parameters before actual communication occurs. Devices agree upon feedback parameters in advance, allowing them to transmit shortened feedback responses without performing traditional channel estimation, thus reducing latency and bandwidth consumption
2Productivity
If multiple devices transmit feedback simultaneously in dense deployments, then spatial reuse is improved, but interference between devices increases
Solution Approach 1:
The patent segments the frequency spectrum into distinct resource units that are allocated to different devices for feedback transmission. By dividing the available bandwidth into separate resource blocks and assigning them to specific devices, the system enables simultaneous transmissions while minimizing interference through frequency separation
Solution Approach 2:
The patent applies local quality by configuring device-specific feedback parameters and resource allocations. Each device transmits feedback with locally optimized characteristics including device-specific cyclic shifts and resource unit assignments, allowing simultaneous transmissions from multiple devices while maintaining signal distinguishability and reducing mutual interference
Data Source
AI summary
A wireless communication device (alternatively, device, WDEV, etc.) includes at least one processing circuitry configured to support communications with other WDEV(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 WDEV(s) and to generate and process signals for such communications. The WDEV generates a trigger frame that requests feedback responses from other WDEV(s) and transmit the trigger frame to the plurality of other WDEV(s). Then, in response to the trigger frame and based on agreed-upon parameters, the WDEV receives simultaneously the feedback responses that include a first feedback response from a first other WDEV and a second feedback response from a second other WDEV (e.g., within respective orthogonal frequency division multiple access (OFDMA) resource unit(s) (RU(s)) as specified by the agreed-upon parameters.