Performance analysis of paging in Hierarchical Mobile IPv4

Micromobility protocols were developed and designed to handle local movement of mobile hosts in a domain. Mobile IP was also extended with a regional registration framework in order to overcome the overhead costs incurred by Mobile IP when the host moved frequently inside a domain. Micromobility protocols like Cellular IP and HAWAII had a major advantage over Mobile IP with regional registration (Hierarchical Mobile IP) due to the fact that they had implemented support for paging in their protocols. Paging significantly reduced network load by identifying and providing a scalable location tracking mechanism for idle users and assisting them to resume communication normally when they become active.;Mobile IP protocol and other micromobility protocol modules were contributed to Network Simulator (NS-2), a widely used and tested discrete event simulator. The target of this research is to extend Columbia University IP Micromobility Suite and add a paging module for Hierarchical Mobile IPv4. The results obtained from simulation using the extended module, proves that significant savings in signaling messages can be obtained by the use of paging. The added module can be used by students and researchers to study, compare, and modify various Paging and Mobile IP micromobility solutions.