Modeling TCP over selective repeat ARQ in wireless networks with non-negligible propagation delay

In this paper, we propose an analytical model for TCP over selective repeat ARQ in wireless networks, in which random loss is the primary impediment to reliable, high-speed data services. We focus on the issue of modeling RTT (round trip time) variation due to ARQ retransmission at the link layer with non-negligible propagation delay. With the proposed model, we present upper and lower bounds for TCP end-to-end throughput. Simulation with ns2 is performed to validate our analysis.