TCP suffers from high packet loss rate and tends to overreact to the ever-changing network dynamism of wireless network that experiences considerable delay variation. And also, it undergoes backoff state repeatedly and enters into a slow starting mode, which in turn leading to the low throughput and excessive end-to-end latency. On the other hand, UDP does not consider recovery of lost packets and the problem of out-of-order delivery resulting in much more data loss. For these reasons, RUDP was proposed at the IETF Internet Draft. In this paper, we focused on the minimization of data packet delay time and aimed to reduce packet loss and deliver the data in order with the proposed protocol. Hence, using OPNET Modeler 14.5 PL8 program under the identical environment, we conducted the comparative analysis simulations between TCP, UDP and RUDP considering "Retransmission function" and sequence acknowledge numbers that are used to monitor packet loss and the order of the received packets, and various timers as major testing factors. The purposes of the simulations conducted for RUDP in this paper are to supplement "unreliable" characteristics of UDP, which is considered as a major problem, and thereby produce reliable data like TCP produces by making use of better characteristic of UDP not just imitating TCP’s characteristics.
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- RUDP Design and Implementation Using OPNET Simulation
- Springer Berlin Heidelberg