Method for calling a mobile terminal in a mobile communication system and a device thereof
First Claim
1. A method for calling a mobile terminal in a mobile communication system with a plurality of radio zones, each of said radio zones has a base station, said method comprising the steps of:
- making a base station store identifiers of predetermined base stations except for its own identifier;
making a mobile exchange office, controlling said plurality of base stations, store an identifier of a mobile terminal and an identifier of a base station where these two identifiers correspond to each other;
making said mobile exchange office search an identifier of a mobile terminal from among stored identifiers when said mobile exchange office has received a call signal for said mobile terminal;
making said mobile exchange office search an identifier of a base station corresponding to said searched identifier for said mobile terminal, from among said stored identifiers;
making said mobile exchange office send said call signal for said mobile terminal to said base station having the corresponding identifier;
making said base station discriminate a sender of said call signal as said mobile exchange office or another base station, when said base station has received said call signal;
making said base station call said mobile terminal in a radio zone belonging to said base station and transferring said call signal to another base station whose identifier is stored therein; and
making said other base station call said mobile terminal in a radio zone belonging to said other base station when a sender of said call signal is said base station.
1 Assignment
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Accused Products
Abstract
A mobile exchange office stores an identifier of a base station corresponding to an identifier of each mobile terminal. The base station stores identifiers of base stations corresponding to an identifier of a mobile terminal except for own identifiers. Receiving a call signal for a mobile terminal, the mobile exchange office searches an identifier of a base station corresponding to the mobile terminal based on this call signal and sends a call signal to a base station in accordance with this searched identifier. The base station determines a sender of the call signal. If the sender is a mobile exchange office, the base station transfers the call signal to another base station corresponding to a stored identifier and calls the mobile terminal in own radio zone. If the sender is a base station, it calls the mobile terminal in own radio zone.
47 Citations
12 Claims
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1. A method for calling a mobile terminal in a mobile communication system with a plurality of radio zones, each of said radio zones has a base station, said method comprising the steps of:
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making a base station store identifiers of predetermined base stations except for its own identifier; making a mobile exchange office, controlling said plurality of base stations, store an identifier of a mobile terminal and an identifier of a base station where these two identifiers correspond to each other; making said mobile exchange office search an identifier of a mobile terminal from among stored identifiers when said mobile exchange office has received a call signal for said mobile terminal; making said mobile exchange office search an identifier of a base station corresponding to said searched identifier for said mobile terminal, from among said stored identifiers; making said mobile exchange office send said call signal for said mobile terminal to said base station having the corresponding identifier; making said base station discriminate a sender of said call signal as said mobile exchange office or another base station, when said base station has received said call signal; making said base station call said mobile terminal in a radio zone belonging to said base station and transferring said call signal to another base station whose identifier is stored therein; and making said other base station call said mobile terminal in a radio zone belonging to said other base station when a sender of said call signal is said base station. - View Dependent Claims (2, 3, 4, 5)
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6. A method for calling a mobile terminal in a mobile communication system with a plurality of radio zones, each of said radio zones has a base station and a plurality of location registration areas, each of said location registration areas including at least one said radio zone, said method comprising the steps of:
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making each base station in each radio zone store identifiers of predetermined base stations except for its own identifier; making a mobile exchange office, controlling said plurality of base stations, store an identifier of a mobile terminal and an identifier of a base station in a location registration area where said mobile terminal belongs, wherein these two identifiers correspond to each other; making said mobile exchange office update an identifier of a base station corresponding to an identifier of said mobile terminal when said mobile terminal has moved from a predetermined location registration area to another location registration area; making said mobile exchange office search an identifier of a mobile terminal from among said stored identifiers and making said mobile exchange office search an identifier of a base station corresponding to said searched identifier from among said stored identifiers when said mobile exchange office has received a call signal for said mobile terminal; making said mobile exchange office add to said call signal an identifier indicating that a sender is said mobile exchange office; said mobile exchange office send said call signal added by said identifier; making a base station discriminate a sender of said call signal based on said identifier of said call signal when said base station has received said call signal; making said base station call said mobile terminal in a radio zone belonging to said base station, add an identifier indicating that a sender is said base station to said call signal and transfer said call signal to an other base station whose identifier is stored when a sender of said call signal is said mobile exchange office; and making said other base station call said mobile terminal in a radio zone belonging said other base station when a sender of said call signal is said base station. - View Dependent Claims (7)
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8. A mobile communication system having a plurality of base stations provided in respective radio zones and a mobile exchange office for controlling said plurality of base stations, and calling a mobile terminal via said base station when said mobile exchange office has received a call signal for said mobile terminal, said mobile communication system comprising;
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said mobile exchange office comprising; mobile exchange office storing means for storing an identifier of each mobile terminal and an identifier of a base station, wherein these two identifiers are corresponding to each other; and means for searching for an identifier of a base station corresponding to an identifier of a mobile terminal from said mobile exchange office storing means when having received a call signal for said mobile terminal, and sending said call signal for said mobile terminal to a base station whose identifier has been searched; and said base stations, each of said base stations comprising; base station storing means for storing identifiers of said base stations except for its own identifier; means for discriminating a sender of a call signal as said mobile exchange office or another base station; and means for transferring said call signal to a base whose identifier is stored in said base station storing means and calling a mobile terminal in a radio zone belonging to said base station when a sender of said call signal is said mobile exchange office, and calling said mobile terminal in a radio zone belonging to said base station when a sender of said call signal is a base station except said base station. - View Dependent Claims (9, 10, 11)
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12. A mobile communication system having a plurality of base stations provided in respective radio zones and a mobile exchange office controlling said plurality of base stations, being provided with a plurality of location registration areas including at least one said radio zones and calling a mobile terminal via said base station when said mobile exchange office has received a call signal for said mobile terminal, said mobile communication system comprising:
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said mobile terminal comprises means for sending a location registration signal when moving from a determined location registration area to another location, each of said base stations comprising; base station storing means for storing a predetermined identifier of each base station except for an identifier of its own base station; means for discriminating a sender of a call signal; means for transferring said call signal to a base station whose identifier is stored in said base station storing means and calling a mobile terminal in a radio zone belonging to said base station when a sender of said call signal is said mobile exchange office, and calling said mobile terminal in a radio zone belonging to said base station when a sender of said call signal is a base station except said base station; and means for receiving said location registration signal, adding its own identifier to said location registration signal and transferring the result to said mobile exchange office; and said mobile exchange office comprising; mobile exchange office storing means for storing an identifier of each mobile terminal and an identifier of a base station corresponding to said each mobile terminal, wherein these two identifiers correspond to each other; means for discriminating a location registration signal whose reception level is highest from said received location registration signals; means for updating an identifier of a base station corresponding to a mobile terminal that has sent said location registration signal stored in said mobile exchange office storing means to an identifier of a base station that has sent said location registration signal having the highest reception level; and means for receiving a call signal for a mobile terminal, searching an identifier of a base station corresponding to an identifier of said mobile terminal from identifiers stored in said mobile exchange office storing means, and sending said call signal for said mobile terminal to a broadcasting station whose identifier has been searched.
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Specification