الفهرس | Only 14 pages are availabe for public view |
Abstract Number of mobile communications is increasing at a phenomenal rate. Supporting mobility will make a decisive different to the Internet’s future performance. MIP is a proposed standard that builds on the Internet protocol by making mobility transparent to applications and higher levels protocols like TCP. In this thesis we present performance measurements of IP-based mobility protocols with respect to many system parameters such as signaling overload, packets delay and packets loss to show their ability in supporting micro/macro/globallevel mobility. Then, we introduce a simulation model for measuring MIPv6 performance in view of packets delay due to supporting mobility. A comparison between IPv4 and IPv6 in supporting mobility is given. We present new proposals for using MIP in IP-based wireless systems. First proposal shows that using priority scheduling for packets forwarded from old FA to new FA after handover can improve network performance and prevent the problem of receiving disordered packets at new FA after mobile node’s handover process. Then we present a model for using MIPv6 in request routing in IP-based CDNs which eliminates relaying on DNS-based request routing. Next, a performance evaluation of IGWs discovery schemes used in connecting MANET to the Internet is presented. We compare these IGWs discovery schemes with respect to signaling overhead and packets delay. Finally, we describe a new method for handling the triangle routing problem encountered in MIP. The method uses a new MGR at the connection points between networks for solving the problems of conventional route optimization procedure. In each proposal we present a simulation model and some numerical examples to show the significance and validity of the proposal and its reliability in achieving the requested improvement. |