WAP Subnet Controller for Legacy Station Concurrent Downlinks
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Solution Overview
Problem
Current wireless local area networks (WLANs) using IEEE 802.11 standards face limitations in supporting concurrent communications with multiple stations, especially legacy devices that do not support multi-user (MU) multiple-input multiple-output (MIMO) protocols, restricting the number of devices that can be included in multi-user groups and excluding billions of existing wireless devices.
Innovation Solution
The implementation of a wireless access point (WAP) with a subnet controller and station set identifier that enables concurrent communications with legacy stations by creating orthogonal frequency division multiplexed (OFDM) MIMO WLAN communications across multiple subnets, allowing for concurrent downlinks to stations without MU-MIMO support by using discrete beacon channels and medium access control (MAC) for collision sense multiple access (CSMA) uplinks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the WAP uses traditional single-subnet CSMA methodology, then legacy stations can communicate, but concurrent downlinks to multiple legacy stations are not supported
Solution Approach 1:
The patent divides the single WLAN subnet into multiple complementary subnets (first subnet and second subnet). Each subnet has its own beacon channel and MAC address space. Legacy stations are distributed across different subnets, allowing the WAP to perform concurrent downlinks to stations on different subnets while each individual legacy station communicates using traditional CSMA uplinks.
2Productivity
If the WAP implements MU-MIMO capability, then concurrent downlinks to MU-MIMO compliant stations are enabled, but legacy stations without MU-MIMO support are excluded
Solution Approach 1:
The patent creates a universal communication framework where multiple complementary subnets coexist within a single WLAN. Each subnet can independently support different communication methodologies (CSMA for legacy stations, MU-MIMO for compliant stations). The WAP dynamically assigns stations to appropriate subnets based on their capabilities, making the system universally compatible with both legacy and modern devices while maintaining high concurrent throughput.
3Productivity
If the WAP creates multiple complementary subnets, then concurrent downlinks to legacy stations are enabled, but device complexity increases
Solution Approach 1:
The patent implements local quality by making each subnet self-contained with its own beacon channel, MAC address space, and association parameters. This modular structure allows the WAP to manage each subnet independently with localized control logic. The subnet controller maintains separate station lists and communication parameters for each subnet, reducing the complexity of managing multiple subnets compared to a monolithic approach.
Data Source
AI summary
A wireless access point (WAP) including: antennas, shared and discrete components forming transmit and receive chains coupled to the antenna for orthogonal frequency division multiplexed (OFDM) multiple-input multiple-output (MIMO) WLAN communications with wireless stations. The station set identifier identifies any legacy stations that do not support multi-user (MU) MIMO concurrent downlinks from the WAP, and a number of WLAN subnets for concurrent downlinks communications thereto. The subnet controller generates the WLAN subnets each having a discrete beacon channel together with a discrete medium access control (MAC) for collision sense multiple access (CSMA) uplinks from associated stations to the WAP, and concurrent downlinks from the WAP including concurrent downlinks to legacy stations associated with different subnets; thereby enabling concurrent downlink communications with said legacy stations despite their lack of support for MU-MIMO.