USING MULTILEVEL HIERARCHICAL REGISTRATION STRATEGY FOR MOBILITY MANAGEMENT

This paper proposes a multilevel hierarchical registration strategy fo r mobility management in highly mobile distributed environments to fac ilitate UPCS. The proposed strategy is based on distributed hierarchic al databases in telecommunication networks to form a hierarchical tree : the lowest-level nodes of tree are service nodes, and the other node s are address information nodes. Our strategy registers personal infor mation in service nodes and keeps track of roaming users' address info rmation in address information nodes, respectively. A send-on-demand p rotocol of personal information for reducing transaction and lock time of user's home database, and real-time updates and queries in service nodes are investigated. Furthermore, the proposed strategy has been e valuated not only for mobile communication services, but also for worl dwide personal communication services in mobility data acquisition, ub iquitous services availability, registration information recovery, and network changes' aspects. Finally, a cost analysis model demonstrates the feasibility of database memory size, updates cost, queries cost, and communications cost in our proposal.