SMOOTH DATA TRANSMISSION USING DCCP

Abstract

Online applications such as streaming require high speed and timely delivery of data. Usually the transport layer protocols with the enhancement of new streaming applications demand for in time delivery of data is higher as compared to the reliability. Transport layer protocols, transmission control protocol (TCP) and user datagram protocol (UDP) are used to transmit the data packets over the IP managed network such as Internet. TCP gives a reliable communication protocol to transmit the data but its reliable communication may be results in transmission delay. UDP never providing any acknowledgment system also it does not provide any congestion control method. Nevertheless the unreliable performance of UDP results in much less delay in data transmission. In these days one of the major problem is the Quality of Service (QoS) guarantee. On the other side, the performance of transport layer protocols can disturb the QoS. So in such cases to avoid these concerns few new transport layer protocols have been designed by Internet Engineering Task Force. The DCCP is at highest rank for the researchers due to its lightweight and design. DCCP is particularly designed to bypass congestion in the network. It is appropriate for in time distribution of data. DCCP also offers service of an unpredictable transport layer protocol, as we know the real time connections demand for in time transmission rather than reliability. This paper evaluates the performance of DCCP protocol. For that, simple network scenarios are proposed for the simulation. In order to see its performance it is compared with the UDP. The experiments are carried on scenario of 80 nodes, 64 nodes and 8 nodes. In all of the experiments the throughput generated by DCCP is greater than UDP.

Keywords : DCCP, TCP-Like, TFRC, UDP, congestion control, real-time applications, throughput, delay