MU Short Feedback Response in Wireless OFDMA Systems
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively utilizing bandwidth and maximizing access for multiple users in dense deployments, with prior art lacking efficient means for channel estimation and communication medium utilization.
Innovation Solution
The implementation of novel architectures and methods for orthogonal frequency division multiple access (OFDMA) in wireless communication systems, including the use of OFDMA resource units and sub-carriers, allows for improved spatial reuse and efficient feedback mechanisms to manage communications between multiple users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication systems are used in dense deployments, then bandwidth utilization is limited, but system capacity and user access are insufficient
Solution Approach 1:
The patent segments the wireless communication system into multiple access points and users, with each access point serving multiple users simultaneously through orthogonal frequency division multiple access (OFDMA). This segmentation enables parallel communications across different frequency sub-carriers, increasing overall system capacity while efficiently utilizing available bandwidth resources.
Solution Approach 2:
The patent introduces frequency dimensionality through OFDMA, dividing the available spectrum into multiple orthogonal sub-carriers. By operating in this additional frequency dimension, the system can support multiple users simultaneously without interfering with each other, thereby increasing system capacity while maintaining efficient bandwidth utilization.
2Measurement precision
If channel estimation operations are performed to provide full and accurate understanding of wireless communication channel, then communication accuracy is improved, but communication overhead and latency increase
Solution Approach 1:
The patent performs channel estimation operations in advance during the preamble phase before actual data transmission. By completing channel characterization beforehand, the system establishes accurate channel state information that can be reused for subsequent communications, reducing the need for repeated estimation operations and thereby minimizing communication latency.
Solution Approach 2:
The patent maintains continuous channel state information through periodic updates and reuse of estimation data. Once channel characteristics are established, they are continuously utilized for multiple transmissions and users, ensuring accurate communication without repeatedly performing time-consuming estimation operations.
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 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 supports first communications with another WDEV to determine an agreed-upon orthogonal frequency division multiple access (OFDMA) resource unit (RU) and agreed-upon OFDMA sub-carriers, adjacent or interspersed, to be used by the other WDEV to provide predetermined response(s). The WDEV then transmits a question to the WDEV and processes the plurality of agreed-upon OFDMA sub-carriers within the OFDMA RU to determine whether energy therein indicates a response of the one or more predetermined responses to the question being received from the other WDEV in accordance with second communications.