General flow table and method for supporting packet switching and circuit switching in SDN framework

Abstract

The invention provides a general flow table and method for supporting packet switching and circuit switching in an SDN framework, and relates to the SDN framework in the information technology. The general flow table comprises a switching type domain, a circuit switching domain and a packet switching domain. The switching type domain comprises four marks of pure circuit switching, pure packet switching, circuit-packet switching and packet-circuit switching. Service flow is forwarded to a network controller of a control layer through a southbound interface. The network controller is used for judging the type and characteristics of the service flow, computing a forwarding path of the service flow and generating the corresponding general flow table. The network controller issues the general flow table to data forwarding equipment of a data layer through the southbound interface, and establishes corresponding forwarding rules in the data forwarding equipment. The service flow completes packet switching and circuit switching in the data forwarding equipment according to the forwarding rules. The general flow table and method can simultaneously support the packet switching technology and the circuit switching technology, and two existing basis independent networks can be replaced by a data and transmission convergent network efficient in operation.

Description

technical field [0001] The invention relates to an SDN architecture in information technology, specifically a general flow table and method for supporting packet switching and circuit switching in the SDN architecture. Background technique [0002] Today, large telecommunication operators and Internet manufacturers respectively own and maintain two distinct basic networks - the layer 3 / 2 IP / Ethernet data network based on packet switching and the layer 1 / 0 TDM / WDM based on circuit switching delivery network. Because the data network and the transmission network are two completely different networks, they have different architectures, switching technologies, control and management mechanisms. In data networks, the control plane and data plane are tightly coupled; while transport networks have traditionally maintained a separation between the data and control planes, it is very challenging to unify the two networks. [0003] The common layered and isolated architecture of the...

AI Technical Summary

Problems solved by technology

[0006] In view of the limitation that OpenFlow, the southbound interface protocol in the current software-defined network SDN architecture, only supports packet switching, it is urgent to invent a new method that supports packet switching and circuit switching at the same time, in order to realize the application of SDN technology to data networks, transport networks and hybrid networks. Universally applicable, promoting the great integration of the network

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