Private mobile communication system easily connecting portable or mobile radio telephone equipment to public network

• US 6,070,081 A
• Filed: 11/19/1997
• Issued: 05/30/2000
• Est. Priority Date: 10/05/1992
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), NTT Mobile Communications Network Inc. (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), NTT Mobile Communications Network Inc. (Nippon Telegraph and Telephone Corporation)
• Inventors: Takahashi, Katsumi, Uchida, Yoshinori
• Primary Examiner(s): Trost, William G.
• Application Number:
  US08/974,676
• Time in Patent Office: 923 Days
• Field of Search: 455/403, 455/410, 455/411, 455/422, 455/426, 455/461-463, 455/550, 455/552, 455/555, 379/156-157, 379/158
• US Class Current: 455/463
• CPC Class Codes: H04W 84/16 WPBX [Wireless Private Branch Exchange]

Abstract

A private mobile communication system serves to support communication between mutual portable or mobile radio telephone equipment which are registered in the system, and communication between the portable or mobile radio telephone communication equipment and telephones connected to a public communication network. Portable or mobile radio telephone equipment which is not registered in the system transmits a call request to the public network through a private control channel controlling section. A radio base station of the system transfers the call request through a private channel to a private branch exchange (PBX). The PBX serves to support the call to the public network in response to the call request transmitted through the private channel.

Claims

1. A private mobile communication system, comprising:

a plurality of radio base stations, each including a private protocol processing section for transmitting and receiving private protocol information through a private control channel, a public protocol processing section for transmitting and receiving public protocol information through a private control channel, and a private control channel controlling section for inserting a private control signal into a control slot of a private control channel;

a private exchange connected to said plurality of radio base stations and to a public network, including a private protocol controlling section for processing, using said private protocol, signals transmitted by portable or mobile radio equipment belonging to said private communication system, and a different system protocol controlling section for permitting access to said public network by portable or mobile radio equipment which does not belong to said private communication system, by using said public protocol through said private control channel; and

a plurality of portable or mobile radio telephone equipment, which belong to a system different from said private communication system, selected from the group consisting of;

1) portable or mobile radio telephone equipment having a public control channel controlling section for inserting a public control signal into a control slot of a public control channel, a private control channel controlling section for inserting a private control signal into a control slot of a private control channel, a public protocol processing section for processing said public protocol information, and a first switch for connecting said public protocol processing section to either said public control channel controlling section or to said private control channel controlling section, said first switch connecting said public protocol processing section to said private control channel controlling section for passing authentication information pertaining to said portable or mobile radio telephone equipment to said public network through said private exchange for calls being placed to destinations on said public network from within said private communication system; and

2) portable or mobile radio telephone equipment having a public control channel controlling section for inserting a public control signal into a control slot of a public control channel, a private control channel controlling section for inserting a private control signal into a control slot of a private control channel, a public protocol processing section for processing said public protocol information, a private protocol processing section for controlling said private protocol information, a second switch for connecting said private control channel controlling section to either said private protocol processing section or said public protocol processing section, and a third switch for connecting said public control channel controlling section to said public protocol processing section, said second switch connecting said private control channel controlling section to said public protocol processing section for passing authentication information pertaining to said portable or mobile radio telephone equipment to said public network through said private exchange for calls being placed to destinations on said public network from within said private communication system, said second switch connecting said private control channel controlling section to said private protocol processing section for connecting itself to the telephones within said private communication system.

2. A private mobile communication system, comprising:

a plurality of radio base stations each including a private protocol processing section to transmit/receive private protocol information through a private control channel, and a public protocol processing section to transmit/receive public protocol information through a private control channel;

a private exchange connected to said plurality of radio base stations and to a public network, said private exchange including a private protocol controlling section for processing a signal transmitted by a portable or mobile radio telephone equipment that belongs to said private system by using said private protocol, and a different system protocol controlling section for permitting access to said public network by a portable or mobile radio telephone equipment which belongs to said private system based a signal transmitted using said public protocol through said private control channel;

a plurality of portable or mobile radio telephone equipment, which belong to said private communication system, selected from the group consisting of;

1) portable or mobile radio telephone equipment having a private control channel controlling section for inserting a private control signal into a control slot of a private control channel, and a private protocol processing section for processing said private protocol information; and

2) portable or mobile radio telephone equipment being registered to have a public subscriber telephone number for personal use, having a public control channel controlling section for inserting a public control signal into a control slot of a public control channel, a private control channel controlling section for inserting a private control signal into a control slot of a private control channel, a public protocol processing section for processing said public protocol information, a private protocol processing section for controlling said private protocol information, a first switch for connecting said private control channel controlling section to either said private protocol processing section or said public protocol processing section, and a second switch for connecting said public control channel controlling section to said public protocol processing section, said first switch connecting said private control channel controlling section to said public protocol processing section for passing authentication information pertaining to said portable or mobile radio telephone equipment to said public network through said private exchange for calls being placed to destinations on said public network from within said private communication system;

wherein

said private exchange includes a position registering/calling section which stores an identification number of a radio base station covering a zone corresponding to a current position of said portable or mobile radio telephone equipment of group (2) upon performance of a position registration of said portable or mobile radio telephone equipment of group (2), and when there is an incoming call from said public network to said portable or mobile radio telephone equipment, said private exchange calls said portable or mobile radio telephone equipment through the radio base station corresponding to the identification number stored in said exchange.