Evaluation Result of Transmission Control Mechanism for Multimedia Streams based on the Multi-RTCP Scheme over Multiple IP-Based Networks

A variety of IP-based applications have been developed and provided due to the penetration of the infrastructure of IP communications consisting of hybrid networks combining the wireless IP network and the fixed network. This paper presents an evaluation of the Multi-RTCP Scheme over hybrid networks composed of wireless and fixed networks. We examined a rate-adaptive sending method for RTP packets based on detailed application-level QoS information on the hybrid network. The QoS information which includes each portion of the hybrid network is reported by the Multi-RTCP scheme. We present several advantages of the adaptive sending method using the Multi-RTCP scheme. Our experiments reveal network quality of service and perceived speech quality in practical conditions of the hybrid networks.