Performance Evaluation of Tcp over Mobile Ip

The aim of this paper is to study the effects of Triangle Routing and Mobile IP handoffs on TCP Performance. The majority of Internet hosts today do not comply with the considerations for routing optimisation. This means that until the wide deployment of next generation Internet hosts, triangle routing will be a permanent effect to Internet mobile communications. For Mobile IP handoffs it is determined that the key issue is the movement detection method (i.e. Lazy Cell Switching, Prefix-Matching, Eager Cell Switching). For this paper the performance of TCP is experimentally tested over various triangle routing lengths and through Mobile IP handoffs. For the latter all three movement detection methods are studied. The principle findings are that: triangle routing degrades the efficiency of a TCP communication by 1% per hop in the network path. TCP communications over Mobile IP handoffs can be brought to a halt for 5.5 seconds and 12.5 seconds when based on the Eager and Lazy Cell Switching methods respectively. The network scenario considered involves single-agent subnetworks and mobile nodes that do not have the capability to contemporarily participate in multiple networks (e.g. IEEE802.11).