Mobility Management in Heterogeneous Wireless Systems
This chapter purposes to survey recent research on mobility management in future generation wireless systems. The concept of interdomain mobility management is introduced together with a solution for session establishment and maintenance during seamless network changes. Mobility management has to provide primary services like location management and handover management, as well as some auxiliary services, such as multihoming and security. Location management enables the serving network to track and locate a mobile terminal (MT) for possible connection. Handover management is the process by which an MT keeps its connection active when it moves from one point of attachment (PoA) to another. Considering auxiliary mobility management services, multihoming has to be supported by the protocol stack, which provides the mobile node (MN) with network access using multiple communication technologies. Hierarchical MIPv6 (HMIPv6) is a local mobility management protocol designed to reduce handover latency and signaling overheads that occur when MN frequently change PoA.