Method for controlling a mobile integrated voice and data (IVD) system having a plurality of personal station (PS'S)

Claim 1

A method for controlling a mobile Integrated Voice and Data (IVD) system, said system having a plurality of Cell Stations (CS's) interconnected through both LAN and PBX telephone networks and a plurality of Personal Stations (PS's) movable among a plurality of radio cells, said PS's being capable of communicating with a CS which manages the PS's through radio links, each of said PS's having a particular LAN identifier, each of said CS's managing a plurality of PBX telephone numbers, having a particular radio cell which defines a territory being capable of communicating through radio links, registering the LAN identifiers of said plurality of PS's which are in its territory, and assigning one of said PBX telephone numbers to each of them respectively, said method including the step of: (a) in response to a first PS moving into a territory of a first CS, registering said first PS's LAN identifier and assigning a PBX number to said first PS by said first CS; (b) sending calling information including a second PS's LAN identifier and said first PS's newly assigning PBX telephone number to said first PS to said first CS via radio links by said first PS; (c) broadcasting said calling information from said first CS to all the other CS's via said LAN by said first CS; (d) in response to a second CS which registers said second PS receiving said calling information, resending it to said second PS via radio links by said second CS; (e) dialling the PBX telephone numbers stored in said calling information by said second PS; and (f) calling said first PS via a PBX link in response to dialling step (e) and establishing a PBX telephone link between said first and second PS's.

Claim 2

A method for controlling a mobile Integrated Voice and Data (IVD) system, said system having a plurality of Cell Stations (CS's) interconnected through both LAN and PBX telephone networks and a plurality of Personal Stations (PS's) movable among a plurality of radio cells, said PS's being capable of communicating with a CS which manages the PS's through radio links, each of said PS's having a particular LAN identifier, and maintaining the LAN identifier of the counterpart PS, each of said CS's managing a plurality of PBX telephone numbers, having a particular radio cell which defines a territory being capable of communicating through radio links, disconnecting a communication link if a reception level of radio waves falls to or below a predetermined threshold value, monitoring of the reception levels during transmission, registering the LAN identifiers of said plurality of PS's which are in its territory, and assigning one of said PBX telephone numbers to each of them respectively, said method including the step of: (a) establishing a communication link between a fist 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 assigning a PBX telephone number to the first PS when the first PS moves to the radio cell of the third CS, (d) sending moving information including the LAN identifier of the second PS and said newly assigned PBX telephone number from the first PS to the third CS through radio links, (e) sending said moving information from the third CS to the second CS via the LAN, (f) sending said moving information from the second CS to the second PS by radio signal, (g) dialling the PBX telephone number included within said moving information from the second PS, and (h) calling the first PS in response to said dialling step, and then re-establishing the PBX telephone link between the first PS and the second PS in response to said calling.

Claim 3

An apparatus for controlling a mobile Integrated Voice and Data (IVD) system, said system having a plurality of Cell Stations (CS's) interconnected through both LAN and PBX telephone networks and a plurality of Personal Stations (PS's) movable among a plurality of radio cells, said PS's being capable of communicating with a CS which manages the PS's through radio links, each of said PS's having a particular LAN identifier, each of said CS's managing a plurality of PBX telephone numbers, having a particular radio cell which defines a territory being capable of communicating through radio links, registering the LAN identifiers of said plurality of PS's which are in its territory, and assigning one of said PBX telephone numbers to each of them respectively, said apparatus including: (a) means for registering a first PS's LAN identifier and assigning a PBX number to said first PS by a first CS, in response to said first PS moving into the territory of said first CS; (b) means for sending calling information including a second PS's LAN identifier and said first PS's newly assigning PBX telephone number to said first PS 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 CS's via said LAN by said first CS; (d) means for receiving said calling information, resending it to said second PS via radio links by said second CS, in response to a second CS which registers said second PS; (e) means for dialling 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 said dialling and for establishing a PBX telephone link between said first and second PS's.

Claim 4

An apparatus for controlling a mobile Integrated Voice and Data (IVD) system, said system having a plurality of Cell Stations (CS's) interconnected through both LAN and PBX telephone networks and a plurality of Personal Stations (PS's) movable among a plurality of radio cells, said PS's being capable of communicating with a CS which manages the PS's through radio links, each of said PS's having a particular LAN identifier, and maintaining the LAN identifier of the counterpart PS, each of said CS's managing a plurality of PBX telephone numbers, having a particular radio cell which defines a territory being capable of communicating through radio links, disconnecting a communication link if a reception level of radio waves falls to or below a predetermined threshold value, monitoring of the reception levels during transmission, registering the LAN identifiers of said plurality of PS's which are in its territory, and assigning one of said PBX telephone numbers to each of them respectively, said apparatus including: (a) means for establishing a communication link between a fist 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 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 moving information including the LAN identifier of the second PS and said newly assigned PBX telephone number from the first PS to the third CS through radio links, (e) means for sending said moving information from the third CS to the second CS via the LAN, (f) means for sending said moving information from the second CS to the second PS by radio signal, (g) means for dialling the PBX telephone number included within said moving information from the second PS, and (h) means for calling the first PS in response to said dialling step, and then re-establishing the PBX telephone link between the first PS and the second PS in response to said calling.