Design And Implementation Of IMS Application Server For Multimedia Video Surveillance

Multimedia Video Surveillance Service is already a mature Internet service, but, due to lack of signaling concept and the corresponding system, session control and related user authentication, authorization, and billing are more difficult, which leads to technical threshold too high for developing the information service and difficultly bring convenience to people’s life through the network, "commercialization" and "public service" function of multimedia video surveillance service has lots of limitations. Multimedia Video Surveillance service as a typical IMS(IP Multimedia Subsystem) service is an important areas for new generation communications service development, which meets the requirements of IMS service, at the same time satisfies the requirements of the operations, the management of teleservice for Service Provider. For making the video surveillance to become an important part of the Information Service Products "E-commerce", it needs to research and develop application server as the platform for integrating video surveillance and other functions in network, and with the IMS signaling mechanism to integrate into the IMS new service, which can support its commercial operation effectively and realize the integrated innovation of the IMS service. So as the main body of the IMS service supporting environment, IMS application server is vital in IMS service.In this thesis, an IMS Application Server designed and implemented for multimedia video surveillance, in order to fully mix the IMS service architecture, IMS application server completely conforms with multimedia service signaling logic standard and protocol, and uses the B2BUA AS operation mode, so it is facilitate for controlling and billing of the service. This thesis also makes the load balancing adjustment for the media server to improve the user quality of experience.The main research contents and obtained achievements in the thesis are as follows.1) This thesis researches and designs the function architecture of the IMS application server for the multimedia video surveillance and the typical service signaling process of multimedia video surveillance, and implements the key signaling process logic.2) A method which could be used to support the transmission media interaction of multimedia service negotiation session is proposed, and the related signaling message flows are designed.3) The design scheme of adoptting AS operation mode of B2BUA is proposed for the Multimedia Service Control Functions entity, and service’s signaling logic are regulated.4) Media server distribution entities are designed, and the dynamic weight adjustment strategy is used to adjust the load balancing of the media server.Results of the tests show that the IMS application server designed and implemented in this thesis meets the requirements of design, and can support multimedia video surveillance service, and the IMS application server has been delivered to China Mobile Group Liaoning Company Limited to demonstrate the application.