Optimum UDP Packet Sizes in Ad Hoc Networks

摘要

Ad hoc networks are comprised of MAC, routing protocols and physical environments. In this paper, optimum MTU (Maximum Transmission Unit) sizes are studied in the ad hoc network environment. For a performance index, the "throughput rate" is denned. The throughput rate is the ratio between the number of packets received and packets sending through the overall systems. MTUs with the sizes between 250 bytes and 750 bytes have been shown to have better throughput rates in the environment without noise. MTUs with the size of 500 bytes have been found to generate the optimum throughput rate in the environments of 10~(-4) BER or less. Similar results are obtained in lower BER environments. AODV has slightly better performance than DSR without noise. These results found to be true for practical mobile environment.