| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved system and method for registering a radio unit at the place of the boundary between geographical service areas so as to dissolve ping-pong phenomena which occur since the radio transmission path between the radio unit and the cells of various different MSC's is affected toy various conditions such as environmental conditions, physical conditions, etc. SOLUTION: This intersystem registering system (method) preserves the information about the registration of a radio unit, within a system at visit destination so that it may use the information when the radio unit returns to the system at its visit destination even when the radio unit is registered in another system. For example, a first visit destination system to a first geographical service area affixes a time stamp to the information about registration to the radio unit when the registration cancel message from a home system is received, and it delays the information about registration to the radio unit by a certain period. The first visit destination system uses the information about registration preserved to the radio unit when the radio unit returns to the first geographical service area.
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