Dynamic Transparent Bridging for Wireless Controller Redundancy
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Solution Overview
Problem
Existing wireless networks face challenges in maintaining high-availability connections due to link failures, which can lead to communication disruptions and increased latency, especially in mission-critical applications.
Innovation Solution
The implementation of a dynamic transparent bridge in electronic devices, such as access points, that establishes a standby network with a selective service set identifier (SSID) and selects a neighboring device to provide communication redundancy when the primary controller is unreachable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If link aggregation based on Ethernet ports is used to ensure redundancy when controller is unreachable, then communication reliability is improved, but load balancing capability is lost
Solution Approach 1:
The patent introduces a standby controller as an intermediary component that takes over controller functions when the primary controller becomes unreachable. The standby controller acts as a mediator to maintain communication reliability without restricting the primary controller's load balancing capabilities, as the standby controller only activates when needed and does not interfere with normal load balancing operations.
Solution Approach 2:
The patent segments the controller function into a primary controller and a standby controller. This segmentation allows the primary controller to perform load balancing operations independently while the standby controller provides redundancy. The segmentation is implemented through separate control planes that can operate independently, resolving the contradiction between reliability and load balancing capability.
2Reliability
If standby controllers are deployed in (N+1) or (1+1) configuration to provide failover redundancy, then communication reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements self-service mechanisms where access points automatically detect controller unavailability and initiate failover to the standby controller without manual intervention. The system monitors its own health status and autonomously activates redundancy when needed, reducing operational complexity while maintaining reliability.
Solution Approach 2:
The standby controller is pre-configured and ready to activate immediately when the primary controller fails. This preliminary preparation eliminates the need for complex real-time decision-making during failover events, as the standby controller is already positioned to take over functions seamlessly, reducing overall system complexity.
3Reliability
If LACP is used for link aggregation redundancy, then communication reliability is improved, but device capabilities are restricted
Solution Approach 1:
The patent makes the standby controller universal by designing it to perform all necessary controller functions including load balancing, client authentication, and network management. This multi-functionality allows the standby controller to replace the primary controller completely when needed, providing reliability without restricting the versatility of the overall system architecture.
Data Source
AI summary
An electronic device may establish a standby network having a service set identifier (SSID). Moreover, the electronic device may receive, from a controller, information specifying neighbors of the electronic device, where the neighbors are within wireless communication range of the electronic device and include a second electronic device. When the electronic device is unable to communicate with the controller, the electronic device may select the second electronic device from the neighbors, where the second electronic device implements a second instance of the standby network having the SSID. Then, the electronic device may provide a message to the second electronic device. Moreover, the electronic device may receive a response to the message from the second electronic device. Next, the electronic device may providing a transparent bridge with the second electronic device using the standby network, where the transparent bridge provides communication of management traffic between the electronic device and the controller.