Title:
METHOD OF REGISTERING POSITION OF MOBILE UNIT FOR MOBILE RADIO COMMUNICATION
Document Type and Number:
WIPO Patent Application WO/1991/003138
Kind Code:
A1
Abstract:
Each of the position registration areas (A, B, C) in mobile radio communication includes a plurality of base station service areas (ai, bi, ci). Since these areas overlap each other, each base station service area (e.g. b23, c23) belongs to a plurality of position registration areas (B, C). Each of the base stations (b23, c23) transmits all the position registration area codes (B, C). An area code, e.g., code (B), is selected so that the position of the mobile unit is located at the center of the area selected. After registering the area code (B), the mobile unit starts communication. Even when the mobile unit moves beyond the boundary of the position registration area during the communication, updating of the area code is not made within the area of the registered area (B). When it moves outside the area (B), the code is updated, that is, the position of the mobile unit is registered so that this position is in the center of the area. Accordingly, the frequency of updating of position registration due to the movement of the mobile unit crossing the boundary of the position registration areas can be reduced much more than in the conventional systems.
Inventors:
FUKUMINE YOSHINOBU (JP)
UTANO TAKANORI (JP)
UMEDA NARIMI (JP)
ONOE SEIZO (JP)
UTANO TAKANORI (JP)
UMEDA NARIMI (JP)
ONOE SEIZO (JP)
Application Number:
PCT/JP1990/001069
Publication Date:
March 07, 1991
Filing Date:
August 22, 1990
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04W60/04; H04W8/18; H04W48/08; (IPC1-7): H04B7/26; H04Q7/04
Foreign References:
| JPH01196929A | 1989-08-08 | |||
| JPS62101136A | 1987-05-11 |
Other References:
See also references of EP 0439628A4
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