OFDMA Access Point Control for Selective SRP Reuse
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Solution Overview
Problem
Existing communication technologies using Spatial Reuse Parameter (SRP) in wireless networks face issues with frame reception failures due to interference when the destination of frames is not the access point, leading to inefficient use of the wireless medium.
Innovation Solution
A communication apparatus that transmits frames with frequency band allocation information and determines whether to permit or prohibit SRP-based communication based on the communication partner apparatus, ensuring that SRP-based communication is prohibited when the frame destination is not the access point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SRP-based communication is permitted for all terminal stations, then efficient use of wireless medium is improved, but frame reception reliability deteriorates due to interference when destination is not the access point
Solution Approach 1:
The patent applies local quality by differentiating SRP permission based on the specific terminal station and its communication partner. Instead of uniformly permitting or prohibiting SRP for all terminals, the access point determines SRP permission individually for each terminal station based on whether its communication partner is another access point or a terminal station. This localized differentiation resolves the contradiction by allowing SRP for terminals communicating with access points (improving productivity) while prohibiting it for terminals communicating with other terminals (protecting reliability).
Solution Approach 2:
The patent implements dynamics by making the SRP permission status changeable and adaptive based on communication conditions. The access point dynamically determines whether to permit or prohibit SRP for each terminal station based on real-time communication partner information. This dynamic adjustment allows the system to optimize wireless medium utilization while preventing interference-related reception failures, resolving the contradiction between productivity and reliability.
2Productivity
If SRP-based communication is permitted, then system throughput is improved, but communication control complexity increases due to directionality considerations
Solution Approach 1:
The patent applies preliminary action by having the access point determine and notify SRP permission status in advance before actual data transmission occurs. The access point includes SRP permission information in frames transmitted to terminal stations, allowing terminals to know beforehand whether they can use SRP-based communication. This preliminary notification simplifies control complexity by providing clear, pre-determined rules rather than requiring complex real-time decisions during transmission.
Solution Approach 2:
The access point acts as an intermediary that manages and coordinates SRP usage for all terminal stations in its BSS. By centralizing the determination of SRP permission at the access point level and notifying terminals accordingly, the patent simplifies the overall control mechanism. The access point mediates between the need for high throughput (via SRP) and the need for reliable reception, making the control decision process more manageable and less complex for the entire system.
Data Source
AI summary
A communication apparatus transmits a frame including frequency band allocation information for communication based on Orthogonal Frequency Division Multiple Access (OFDMA), and determines whether to permit or prohibit Spatial Reuse Parameter (SRP) based communication in accordance with a communication partner apparatus of each of a plurality of terminal stations in a network managed by the communication apparatus. The communication apparatus, in a case where it is determined that the SRP based communication is to be prohibited, transmits the frame including information indicating that the SRP based communication is prohibited.