US 5,473,669 AGranted

Method for controlling a mobile IVD system having a plurality of personal stations (PSs)

AssigneeInternational Business Machines Corporation

InventorsYoshihisa Kanada, Yoshihiko Terashita, Masaaki Kasuya, Yukari Katoh

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Abstract

A system and method enables the reception of signals on a moving Personal Station (PS) within an Integrated Voice and Data (IVD) system which integrates sound and data, and comprises an available PBX and LAN. A first Cell Station (CS) registers the LAN identifier of a first PS that is positioned within its own radio cell, and assigns a PBX telephone number to the first PS. Subsequently, calling information which includes a LAN identifier for a second PS and the PBX telephone number assigned to the first PS is broadcast via a LAN. Thereafter, a second CS which registers the LAN identifier of the second PS receives the calling information via a LAN and transfers the information of the second PS, or mobile station, via radio link. The second PS then dials the PBX telephone number included in the calling information. Thus, the link between the first PS and the second PS is connected when the first PS receives the call.

Claims4

Dependent claims

A mobile Integrated Voice and Data (IVD) system, comprising:

a LAN and a PBX telephone network;
a plurality of Cell Stations (CSs) interconnected through both said LAN and said PBX telephone networks, each CS having a radio cell defined as the territory in which it is capable of radio communication;
a plurality of Personal Stations (PSs) movable among a plurality of radio cells, said PSs being capable of communicating with a CS which manages said PSs through radio links, each of said PSs having a particular LAN identifier,
each of said CSs managing a plurality of PBX telephone numbers, each CS registering the LAN identifiers of said plurality of PSs which are positioned in its territory, and assigning one of said PBX telephone numbers to each PS respectively,
said system further comprising:
(a) in response to a first PS moving into a territory of a first CS, means for registering said first PS's LAN identifier and assigning a PBX number to said first PS by said first CS;
(b) means for sending calling information including a second PS's LAN identifier and said first PSs newly assigned PBX telephone number to said first CS via radio links by said first PS;
(c) means for broadcasting said calling information from said first CS to all the other CSs via said LAN by said first CS;
(d) in response to a second CS which registers said second PS, means for receiving said calling information, and resending it to said second PS via radio links by said second CS;
(e) means for dialing the PBX telephone numbers stored in said calling information by said second PS;
and
(f) means for calling said first PS via a PBX link in response to dialing step (e) and connecting a PBX telephone link between said first and second PSs.

9 more elements

A system for controlling a mobile Integrated Voice and Data (IVD) system,

said system having a plurality of Cell Stations (CSs) interconnected through both LAN and PBX telephone networks and a plurality of Personal Stations (PSs) movable among a plurality of radio cells,
said PSs being capable of communicating with a CS which manages the PSs through radio links,
each of said PSs having a particular LAN identifier, and maintaining the LAN identifier of the counterpart PS,
each of said CSs managing a plurality of PBX telephone numbers, having a particular radio cell which defines a territory in which it is capable of communicating through radio links, monitoring the reception levels of communication links during transmission, disconnecting a communication link if a reception level of radio waves falls to or below a predetermined threshold value, registering the LAN identifiers of said plurality of PSs which are positioned in its territory, and assigning one of said PBX telephone numbers to each of them respectively, said system comprising:
(a) means for connecting the communication link between a first PS within a radio cell of a first CS and a second PS within a radio cell of a second CS,
(b) means for instantly disconnecting said communication link if the first PS moves beyond the radio cell of the first CS and the reception level of radio waves falls to or below said predetermined threshold value,
(c) means for registering the LAN identifier of the first PS in a third CS, and simultaneously newly assigning a PBX telephone number to the first PS when the first PS moves to the radio cell of the third CS,
(d) means for sending by the first PS of moving information having the LAN identifier of the second PS and said newly assigned PBX telephone number through radio links to the third CS,
(e) means for sending by the third CS of said sent moving information via the LAN to the second CS,
(f) means for sending by the second CS of said sent moving information by radio signal to the second PS,
(g) means for dialing by the second PS of the PBX telephone number within said sent moving information, and
(h) means for calling the first PS in response to said dialing step, and then reconnecting the PBX telephone link between the first PS and the second PS in response to said calling.

9 more elements

A method for controlling a mobile Integrated Voice and Data (VD) system,

said system having a plurality of Cell Stations (CSs) interconnected through both LAN and PBX telephone networks and a plurality of Personal Stations (PSs) movable among a plurality of radio cells,
said PSs being capable of communicating with a CS which manages the PSs through radio links,
each of said PSs having a particular LAN identifier, and maintaining the LAN identifier of the counterpart PS,
each of said CSs managing a plurality of PBX telephone numbers, having a particular radio cell which defines a territory in which it is capable of communicating through radio links, monitoring of the reception levels of communication links during transmission, disconnecting a communication link if a reception level of radio waves falls to or below a predetermined threshold value, registering the LAN identifiers of said plurality of PSs which are positioned in its territory, and assigning one of said PBX telephone numbers to each of them respectively,
said method comprising the steps of:
(a) connecting the communication link between a first PS within a radio cell of a first CS and a second PS within a radio cell of a second CS;
(b) instantly disconnecting said communication link if the first PS moves beyond the radio cell of the first CS and the reception level of radio waves falls to or below said predetermined threshold value,
(c) registering the LAN identifier of the first PS in a third CS, and simultaneously newly assigning a PBX telephone number to the first PS when the first PS moves to the radio cell of the third CS,
(d) sending by the first PS of moving information having the LAN identifier of the second PS and said newly assigned PBX telephone number through radio links to the third CS,
(e) sending by the third CS of said sent moving information via the LAN to the send CS,
(f) sending by the second CS of said sent moving information by radio signal to the second PS,
(g) dialing by the second PS of the PBX telephone number within said sent moving information, and
(h) calling the first PS in response to said dialing step, and then reconnecting the PBX telephone link between the first PS and the second PS in response to said calling.

10 more elements

Dependencies are inferred from the claim text.