1 PERFORMANCE ANALYSIS OF MICROMOBILITY PROTOCOLS IN IP- BASED CELLULAR NETWORKS

Abstract:- The Internet Engineering Taskforce (IETE) Mobile IP protocol is considered to have limitation in its capability to handle large number of Mobile stations moving fast between different radio cells. However, Mobile IP is well suited for interconnecting disparate cellular networks effectively providing global mobility. The IETF Mobile IPV6 protocols have been developed for intra domain micromobility. Micromobility protocols like cellular IP, Hawaii and Hierarchical Mobile IP are developed to solve the problems of handoff latency and control overhead of Mobile IP. In these protocols, a tree access network topology is assumed. An actual network topology would be a mixture of a tree and mesh topology. For reasons of robustness against link failures and load balancing, extra uplinks and mesh links in the topology are desired. In this paper, we present the performance of micromobility protocols in the proposed partial mesh topology and hierarchical topology. The simulation results presented in this paper are based on the network simulator ns2.1b7a. From the results, it is observed that the cellular IP and Hierarchal Mobile IP do not take advantage of extra links present in the partial mesh network whereas Hawaii uses the presence of mesh to reduce handoff latency, UDP packet loss or duplication