SDN Controller Routing Engine for Video Stream Optimization
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Solution Overview
Problem
Hybrid SDN networks struggle to provide optimum routes for new types of applications, such as high-definition video conferences, due to the lack of a global view and the need for manual configuration of router settings, which complicates the management of traffic routing.
Innovation Solution
An SDN network service system with a controller that includes a network manager, routing engine, and relay-router managing module, which dynamically calculates and updates optimum routes using a router-link matrix table, adjusts video data stream quality based on RTCP packets, and automatically generates routing rules for forwarding devices, ensuring efficient packet flow redirection and backup route calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual configuration of router settings is used, then routing control is possible, but management complexity increases and automation is reduced
Solution Approach 1:
The patent introduces an SDN controller as an intermediary between network administrators and physical routers. The controller abstracts complex routing configurations by providing high-level service definitions, automatically translating them into detailed router settings. This mediator handles the complexity of manual configuration while presenting a simplified interface to users, resolving the contradiction between routing control capability and management ease.
2Reliability
If legacy hardwired switches are used, then network stability is maintained, but adaptability to new applications is reduced
Solution Approach 1:
The patent segments the network control function from the data forwarding function. Legacy switches continue to handle data forwarding reliably without modification, while the SDN controller handles adaptive routing decisions for new applications. This segmentation allows the stable legacy infrastructure to coexist with adaptive SDN-controlled routing, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The SDN controller provides universal adaptability across different application types (video conferencing, cloud services, IoT) while legacy switches maintain their specialized reliable forwarding function. The controller can dynamically adjust routing policies for various applications without requiring changes to the underlying legacy switch infrastructure, enabling both stability and versatility simultaneously.
3Productivity
If global view routing is implemented, then optimum routes can be calculated, but system complexity increases
Solution Approach 1:
The patent extracts the complex global view routing calculation function from individual routers and centralizes it in the SDN controller. The controller collects topology information from all switches, performs global optimization calculations, and distributes simplified routing instructions back to the network devices. This extraction concentrates complexity in a single controllable location while simplifying individual router functions, resolving the contradiction between route optimization capability and distributed system complexity.
Data Source
AI summary
A network service method based Software Defined Networking (SDN) assigns forwarding devices according to network addresses and identification of a client and provides the client with an optimum route according to user requirements and current network states. A continuous monitoring process is continuously performed for route optimization based on network states, topology variations, and user feedbacks.