Network configuration for mobility in mobile IP based system

Mobile IP (MIP) is proposed to manage mobility of devices. Mobile IP makes mobile nodes remain attached to the Internet even if they move away from the current link. However, the operation of MIP takes excessive signaling cost to register because a mobile node has to register with its home agent whenever it changes connectivity of link. Thus, we propose a hierarchical mobile IP with paging (P-HMIP) scheme to reduce the registration cost. In this scheme, we adopt a hierarchical scheme and a paging scheme at the same time. Then, we derive the signaling cost function of registration to analyze the performance of the proposed scheme. Using this cost function, we can determine the optimal size of each area which makes the registration cost minimal