Personal telecommunications(PT) are considered to be one of the most attractive telecommunication services in the forthcoming era. In PT services mobility management is one of the most important functions. Since the number of PT users is to be 50 percent of Public Switched Telephone Network(PSTN) users in the near future, location tracking of such a large number of users in real time is not a simple task and thus the currently existing techniques of location registration are not applicable to PT users. Location registration functions should be realized by distributed network architectures based on the Intelligent Network(IN) concept with distributed databases as well as serice management functions
In this paper hierarchical managements of location information in PT networks are studied and their performances are evaluated. In hirarchical model, both number of database node and number of messages decrease as layer is higher, so the performance and the capacity of database system required for processing messages are fully distributed. A hierarchical location area sectorization method with non-uniform division is proposed and compared with a hirarchical location area sectorization method with uniform division, in terms of the average number of registration messages and the number of querying messages for locating the PT users. The result shows that the former yields less messages on each layer in the hirachical structure than the latter.
