A Distributed Architecture of Video Conference Using P2P Technology

Most of the traditional video conferencing are standard SIP or H.323 architecture. There will be a single point of performance bottlenecks if large-scale video conference or a larger number of conferences emerge at the same time. In this paper, we proposed a new architecture of Multipoint Video Conference which can support a lot of meetings simultaneously using P2P and application multicast technology. In the side of server, the component called Media Control Server (MCS) is responsible for the media data process and transmission path selection. All the MCSs form the MCS overlay. The capacity and conference state information of User Equipments (UE) are stored in the MCS overlay. MCSs which be selected process all the transcoding and transmission task of audio and video for a meeting. In the side of user, some UEs which have enough bandwidth or other conditions could also undertake parts of media data process. MCS that service to the first UE in a conference decides which audio media process task could be assigned to Conference UEs; video media process task is allocated by Service MCS of video source. There are several methods to decide the transmission path, such as delay by server, application layer multicast or Hungarian method. At last, analysis is given to demonstrate the effectiveness of our architecture.