SDN Edge Node Routing Rule Acquisition
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Solution Overview
Problem
The centralized control in Software-Defined Networks (SDNs) leads to significant signaling overhead between user plane devices and network controllers, reducing communication efficiency due to the constant need for network controller decisions and data forwarding path updates as user equipment moves.
Innovation Solution
Implementing a data transmission method in SDNs that involves edge nodes receiving data packets, determining target edge nodes, and acquiring routing rules from a network controller to optimize signaling interworking and reduce the processing burden on the network controller by pre-configuring routing information and using static routing rules when possible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If centralized control is implemented in SDN, then network control and management capability is improved, but signaling overhead increases and communication efficiency deteriorates
Solution Approach 1:
The patent segments the network into control plane (network controller) and data plane (edge nodes), allowing centralized control functionality to be separated from data forwarding. Edge nodes are further segmented into those that need routing rules and those that can use static routing, reducing the signaling burden on the network controller.
Solution Approach 2:
The patent implements preliminary action by pre-configuring static routing rules at edge nodes before data transmission begins. This allows edge nodes to forward data packets without real-time communication with the network controller, significantly reducing signaling overhead while maintaining centralized control capability when needed.
2Measurement precision
If real-time routing decisions are made by network controller, then routing accuracy is improved, but communication efficiency deteriorates due to constant signaling
Solution Approach 1:
The patent applies partial action by having the network controller provide routing rules only to edge nodes that require dynamic routing decisions, while other edge nodes use pre-configured static routing rules. This partial approach maintains routing accuracy where needed while improving overall communication efficiency by eliminating unnecessary signaling for nodes that don't require real-time control.
Solution Approach 2:
The network controller creates and distributes routing rule copies to multiple edge nodes based on their needs. Edge nodes store local copies of routing rules, allowing them to make forwarding decisions independently without continuous communication with the controller, thus maintaining routing accuracy while improving communication efficiency.
3Adaptability or versatility
If user equipment mobility is supported with frequent path updates, then adaptability is improved, but signaling overhead increases and communication efficiency deteriorates
Solution Approach 1:
The patent implements dynamics by enabling edge nodes to dynamically acquire updated routing rules from the network controller when user equipment mobility requires path changes. However, this dynamic behavior is activated only when necessary, allowing the system to adapt to mobility while minimizing signaling overhead during stable conditions through static routing.
Data Source
AI summary
Embodiments of the present invention provide a data transmission method, a transmission control method, and a device. An SDN includes: a network controller, a first edge node, and at least one second edge node, where the network controller provides a target routing rule for the first edge node, the first edge node receives a data packet that needs to be transmitted, determines a target edge node, acquires the target routing rule from the network controller according to the target edge node, and sends the data packet to the target edge node according to the target routing rule; and when used as the target edge node, the at least one second edge node receives the data packet sent by the first edge node, and complete transmission of the data packet. The technical solutions in the present invention can improve communication efficiency of the SDN.