Research and implementation of concurrent transmission with real-time multimedia

With the development of the Internet of Thing (IOT) industry, real-time multimedia data transmission services increased significantly. In this paper, we study the key problems of concurrent transmission of real-time multimedia, and we divide the transmission process into stream processing layer, transport control layer and multicast concurrency layer. Particularly in the transport control layer we use UDP-TCP mixing mechanism to implement transmission rate control and lost packet retransmission, and a proxy-based application layer multicast (ALMP) method is proposed to implement concurrent transmission of multimedia data. Finally, we test the performance of data forwarding node in concurrent transmission. The result shows that work of data forwarding node is effective and reliable when users have a highly concurrent operation, and the proposed proxy-based application layer multicast method is effective compare to traditional method when optimize the performance of data forwarding node.