Performance evaluation of Datagram Congestion Control Protocol in Mobile Ad Hoc Networks

Abstract

User Datagram Protocol (UDP) is proposed for the efficient servicing of multimedia traffic flows in Internet and it does not make use of any congestion control mechanism. The Internet Engineering Task Force (IETF) is working on development of a protocol standard that is suited to the needs of multimedia applications, known as the Datagram Congestion Control Protocol (DCCP) [6]. DCCP combines the end-to-end transport and congestion control semantics of TCP with the low-delay unreliable service provided by UDP. DCCP performance over the wired network with bursty traffic has been tested and has shown that DCCP holds promise as a wired network transport protocol [4]. However, to the best of our knowledge, the working of DCCP over Mobile Ad hoc Networks has not been evaluated. In this paper, we have evaluated the performance of DCCP over Mobile Ad Hoc Networks [10]. The two congestion control schemes made available under DCCP (TCP-like - CCID2 and TFRC - CCID3) were evaluated in a simulation environment, comparing with TCP considering throughput, end-to-end delay and packet loss as metrics [7,8]. Our results show that DCCP achieves considerably better throughput than TCP.