Mobility Management In Mobile Internet

Mobile Internet consists of wired Internet and all kinds of wireless networks. The combination of currently existing wireless LANs, wireless cellular networks, satellite networks and traditional wired Internet becomes so-called mobile Internet. This paper mainly discusses mobility management algorithm in mobile Internet, which contains unicast mobility management and multicast mobility management.This paper firstly surveys and studies various kinds of mobility management protocols, then analyzes and compares the advantages and disadvantages of these protocols. We then propose a novel unicast mobility management algorithm, which combines effectively the ideas of macromobility and micromobility management, which makes full use of our proposed RingNet model, which adapts domain foreign agent concept such as Leader Border Router (LBR) to hide mobility of mobile hosts within the foreign domain from the home agent, which restricts the handoff processing overheads within the vicinity of the mobile node, and which uses multicast as the packet forwarding mechanism to deliver packets to multiple Access Proxies(APs) within the vicinity of the mobile node to achieve fast handoff performance. Furthermore, this scheme is based on the Internet Protocol (IP) and is compatible with mobile IP and its route optimization option. Through comparison with Hierarchy Mobile IP(HMIP), the scheme presents better performance than HMIP. As to multicast mobility management, this paper uses a simple prediction algorithm to provide necessary information for advance resource reservation, and proposes a novel multicast mobility management algorithm based on prediction and resource reservation. The proposed algorithm takes advantage of our designed four kinds of status: "Not-in-the-group", "PassiveReservation", "QuasiReservation", "ActiveR-eservation", and two kinds of range which are closely related to AP (Acess Proxy): TransmissionRange and ReservationRange. By judging the status of AP and the distance between Mobile Host (MH) and AP, operations of mobility management can be implemented. The introduction of prediction algorithm decreases greatly the blindness of resource reservation, andavoids the unnecessary waste of bandwidth, while the introduction of resource reservation makes smooth > seamless handoff highly possible. Through qualitative analysis and comparison, the algorithm shows smaller handoff delay.