Master AP Parallel OFDMA Slave Selection
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Solution Overview
Problem
In wireless communication networks, determining the slave access point (AP) among multiple APs present near a master AP is time-consuming due to sequential communication, which hampers efficient data transmission and increased throughput in Multi-AP communication scenarios.
Innovation Solution
A communication device operates as a master AP, generating and transmitting frames using OFDMA to request information from neighboring APs, allowing for parallel response reception, thereby reducing the time required to gather necessary information and determine the slave AP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the master AP sequentially communicates with multiple neighbor APs to receive information, then the communication process is simple to implement, but the time required to receive information from all APs becomes excessively long
Solution Approach 1:
The patent combines multiple individual communication processes into a single parallel communication process using OFDMA. The master AP transmits information to multiple neighbor APs simultaneously on different frequency subcarriers, and receives responses from all neighbor APs in parallel, thereby drastically reducing the total communication time compared to sequential one-on-one communication.
Solution Approach 2:
The patent introduces frequency dimension multiplication by utilizing OFDMA technology. Instead of communicating in a single time sequence, the system divides the frequency spectrum into multiple orthogonal subcarriers, allowing simultaneous communication on multiple frequency dimensions. This transforms a one-dimensional time-based sequential process into a multi-dimensional parallel process.
2Productivity
If the master AP waits for all neighbor APs to respond sequentially, then communication reliability is maintained, but the determination of slave AP is delayed
Solution Approach 1:
The patent merges multiple individual response receptions into a single unified parallel reception process. The master AP receives information from all neighbor APs simultaneously through OFDMA, ensuring that no response is missed while dramatically accelerating the determination process. This parallel approach maintains completeness of information collection while improving speed.
3Productivity
If sequential one-on-one communication is used between master AP and neighbor APs, then communication protocol implementation is straightforward, but throughput is limited
Solution Approach 1:
The patent exploits frequency dimension multiplication through OFDMA to enable parallel communication. By assigning different orthogonal frequency subcarriers to different neighbor APs, the system achieves multi-fold throughput improvement. This dimensional expansion transforms the communication capacity without requiring complex spatial MIMO configurations.
Solution Approach 2:
The patent makes the OFDMA communication mechanism serve multiple functions simultaneously: it enables parallel information exchange, performs slave AP determination, and establishes Multi-AP communication relationships all in a single communication phase. This multi-functionality reduces the number of separate communication protocols needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the time needed to receive information from multiple APs, enabling faster selection of the slave AP and initiating Multi-AP communication more efficiently, thereby enhancing communication performance and throughput.
Implementation Method 1
reception means for receiving a response frame transmitted from each of the plurality of other communication devices in parallel in response to the frame in the frequency component indicated by the second information using Orthogonal Frequency Division Multiple Access (OFDMA)
Data Source
AI summary
A communication device (100) that operates as an access point transmits a frame including first information to request communication devices (104, 105, 106) configured to operate as an access point to transmit information about the own device to the communication device (100) and second information indicating an RU used by the communication devices (104, 105, 106) to transmit the first information, and receives, in parallel, a response frame in response to the transmitted frame including information about the communication devices (104, 105, 106) in the RU indicated by the second information using Orthogonal Frequency Division Multiple Access (OFDMA).