HOME ZONE SERVICE METHOD FOR MOBILE TELEPHONE SUBSCRIBERS IN MOBILE RADIO COMMUNICATION SYSTEM

摘要

Disclosed is a home zone service method for assigning a specified zone to a mobile telephone subscriber and charging the subscriber at different billing rated accordingly as the subscriber makes a telephone call inside or outside the zone. According to the home zone service method, a zone which is defined by a first measurement value and a second measurement value as a sub-sector is determined by measuring a round trip delay from a fixed location in a sector of a cell to the neighbor base stations to which the subscriber belongs, so that a predetermined home zone database including the first value and the second value is prepared. The round trip delay is measured from a specified signal if a portable mobile terminal of the subscriber generates a request signal to establish a call connection. Then, it is determined whether the subscriber is located inside the sub-sector if the measured round trip delay falls between the first value and the second value of the home zone database.