SDN Controller Coordination for Partitioned Wireless Networks
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Solution Overview
Problem
Current software defined networking techniques struggle to manage partitioned wireless networks effectively, where only the primary component continues to operate, and other partitions cannot reconfigure or update until they reconnect, leading to suboptimal network performance.
Innovation Solution
A method and apparatus that allows controllers in all partitions of a software defined wireless network to function independently by synchronizing data using message sequencing information, enabling each partition to operate with synchronized data and maintain network functionality even when disconnected from the primary component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a central controller is used in software defined networking, then network control and management is simplified, but the system cannot operate when the network is partitioned into disconnected subnetworks
Solution Approach 1:
The patent divides the network into multiple autonomous partitions, each with its own controller that can operate independently. When partitions are disconnected, each partition's controller continues to manage its local segment without requiring communication with other partitions, thus resolving the contradiction between centralized control simplicity and partition operation capability.
2Stability of the object's composition
If one partition is designated as primary and others as secondary, then a clear hierarchy is established, but non-primary partitions cannot reconfigure or update network devices until reconnection
Solution Approach 1:
The patent enables controllers in non-primary partitions to dynamically reconfigure and update network devices within their partitions even when disconnected from the primary controller. This dynamic capability allows each partition to adapt to changing conditions independently, resolving the contradiction between maintaining a stable hierarchical structure and enabling continuous productivity in partitioned conditions.
3Reliability
If controllers in non-primary partitions are restricted from changing, then data consistency is maintained, but the network cannot reflect the current state of partitioned networks
Solution Approach 1:
The patent allows each partition's controller to maintain data consistency within its local partition while independently reflecting the current state of that partition. Each controller has the authority to update network devices locally to match the actual partitioned network state, resolving the contradiction between maintaining data consistency and adapting to partitioned conditions.
Data Source
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AI summary
A method and apparatus for a software defined wireless network (100). The software defined wireless network (100) comprises a plurality of wireless devices (102) and a plurality of controllers (104). The plurality of wireless devices (102) is configured to be separated into functioning partitions (110) in the software defined wireless network (100). The plurality of controllers (104) is located on the plurality of wireless devices (102). Controllers (104) in the plurality of controllers (104) in a functioning partition (112) in the functioning partitions (110) are configured to perform operations (116) in the functioning partition (112) with data (114) synchronized using message sequencing information (118) in the functioning partition (112).