Patent ID: 6070081
Filing Date: 2000-05-30
Classification: H04W

Abstract:
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; anda 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; and2) 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.