Research And Implementation Of The Openflow Network Session Management Mechanism

In recent years, with the rapid development of the Internet, network technologies continue to develop,want the existing network of innovative testing is becoming increasingly difficult. In view of this situation, the Stanford University proposed a innovative verification technology which is based on the new network control and forwarding separation-thinking, the OpenFlow technology., Network Innovation researchers can test the new network protocols and network technology on the network.No connection characteristics inherent in the traditional Internet network, and the principle of "best-effort" service, making the traditional Internet network can not provide effective protection for these real-time services, effective monitoring and management of network sessions also can not be achieved. Therefore, the management and control of the real-time business problems become a difficult and hot issues that currently need to be resolved.In this paper we have study the major real-time business service features,the key technologies,the applications,the major real-time business session management architectures and their latest development directiones, analysis the real-time business session management and control system architectures in IP network and traditional telecom network, key technologies and the latest developments, and compare their advantages and disadvantages, research a program which could combine the mechanisms of the session management and control of real-time business in IP network and telecom network with OpenFlow network which have the core thinking of control and forwarding separation and centralized control.Through research the session management mechanism of the core technology SIP of the typical traditional Internet real-time business---VOIP business,we propose the demand of real-time business in OpenFlow network, design the architecture of OpenFlow network real-time business session management mechanism.Using the idea of separation control and forwarding, the control message and data of application of real-time business would get different processing and forwarding, using the centralized control thinking of OpenFlow the real-time business could get centralized session manage and control. Based on this we detailed design the frame structure and function modules for real-time business session management mechanism. The goal is to achieve a reasonable and effective management and control of the real-time business session in OpenFlow network, at the same time to ensure the real-time business requirements of network resources and the quality of service.