A comparative analysis of DCCP variants (CCID2, CCID3), TCP and UDP for MPEG4 video applications

New emerging technologies like Multimedia applications require timely delivery of information as compared to reliability. The most widely used protocols over transport layer are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Both of these have some drawbacks while using in real time applications. TCP increases delay in transfer of data but achieving reliable transfer of data while UDP does not provide any acknowledgment, hence it overcomes the problem of delay but lacking congestion control mechanism. To provide congestion control over transport layer using UDP, Datagram Congestion Control Protocol (DCCP) has been designed to provide timely delivery of data and congestion control mechanism as well. In this research text, we have worked out the behavior of video applications over DCCP environment. We have analyzed the performance of MPEG4 video over transport layer using DCCP variants, UDP and TCP under competing and non-competing topology. Delay, throughput, jitter and packet loss are used to assess the performance of these protocols. Our results show that DCCP can be used as a transport layer protocol for video applications, which may result in improved throughput, reduced packet loss as compared to UDP but the delay and jitter of UDP is much lesser than DCCP variants. According to the results DCCP assures better QoS than other transport protocols for video transmission under congestion.