Private radio system for delivering incoming calls to a mobile subscriber
First Claim
1. A private network system, comprising:
- at least a first exchange, a second exchange; and
a third exchange for exchanging telephone calls, said first, second, and third exchanges being connected through a network;
a radio telephone, said first exchange being a home exchange of said radio telephone, said radio telephone including position registration request signal transmission means for transmitting a position registration request signal including an identification code of said radio telephone;
a first radio connection controller connected to said first exchange;
a second radio connection controller connected to said second exchange, said second radio connection controller transmits said position registration request signal, upon receipt of said position registration request signal from said radio telephone, to said second exchange;
said second exchange comprises;
second registration means for recording the identification code of said radio telephone and information indicating that said second exchange is a visitor exchange of said radio telephone, when said radio telephone is a visitor radio telephone of said second exchange, upon receipt of said position registration request signal through said second radio connection controller, andterminal movement notification signal transmission means for transmitting a terminal movement notification signal to said network with the identification code of said radio telephone and an identification code of said second exchange when the identification code of said radio telephone is registered in said second registration means;
said first exchange comprises;
first registration means for registering the identification code of said radio telephone with information that said first exchange is the home exchange of said radio telephone, and further registering an identification code of said second exchange as a visitor exchange in correspondence with the identification code of said radio telephone upon receipt of said terminal movement notification signal including the identification code of the said radio telephone and the identification of the said second exchange from said second exchange through said network in the case where the identification code of said radio telephone added in said terminal movement notification signal corresponds to the identification code of said radio telephone recorded in said first registration means and the information that said first exchange is the home exchange of said radio telephone has been recorded therein,visitor exchange registration determination means for determining whether the identification code of said second exchange has been registered or not as said visitor exchange in said first registration means in correspondence to said radio telephone by referring to said first registration means, upon receipt of an incoming call to said radio telephone,transfer means for transferring the incoming call to said second exchange when the identification code of said second exchange has been registered as a visitor exchange in correspondence to said radio telephone as a result of the determination by said visitor exchange registration determination means, andfirst connecting means for connecting the incoming call to said radio telephone through said first radio connection controller when the identification code of said second exchange has not been registered as a visitor exchange in correspondence to said radio telephone as a result of the determination by said visitor exchange registration determination means, and further that the identification code of said radio telephone has been recorded in said first registration means together with information that said first exchange is the home exchange of said radio telephone;
said second exchange further comprises;
second connecting means for connecting the incoming call to said radio telephone through said second radio connection controller, referring to said second registration means upon receipt of the incoming call transferred by said transfer means if the identification code of said radio telephone has been registered in said second registration means;
wherein said terminal movement notification signal transmission means transmits said terminal movement notification signal to said first and third exchanges through said network;
wherein said first exchange refers to said first registration means upon receipt of said terminal movement notification signals and transmits an answer signals including the identification code of said first exchange;
to said second exchange if the identification of said radio telephone has been registered as well as information indicating that it is the home exchange of said radio telephone; and
wherein said third exchange does not transmit said answer signal to said second exchange.
1 Assignment
0 Petitions
Accused Products
Abstract
A private network system including mobile radio telephones is able to originate connection and terminate connection even when any of the mobile radio telephones are moved from one exchange where the position of the mobile radio telephone is registered to another exchange. In the private network system which comprises a plurality of exchanges for switching telephones, each of the exchanges includes one or more radio connection controllers for radio communicating with mobile radio telephones, and a plurality of mobile radio telephones connected through the radio connection controller to the exchange for switching, the radio connection controller has an area in which the controller can communicate with the mobile radio telephones. Each of the mobile radio telephones has detection means for detecting movement thereof from the area to a different area and position registration means, upon movement of the telephone to the different area, for reporting the position thereof to the home exchange through the radio connection controller, and each of the exchanges has determination means for determining whether or not a mobile radio telephone has moved from an area of radio connection controller contained in a different exchange and transfer means for transferring a terminating call to the different exchange when appropriate.
52 Citations
14 Claims
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1. A private network system, comprising:
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at least a first exchange, a second exchange; and
a third exchange for exchanging telephone calls, said first, second, and third exchanges being connected through a network;a radio telephone, said first exchange being a home exchange of said radio telephone, said radio telephone including position registration request signal transmission means for transmitting a position registration request signal including an identification code of said radio telephone; a first radio connection controller connected to said first exchange; a second radio connection controller connected to said second exchange, said second radio connection controller transmits said position registration request signal, upon receipt of said position registration request signal from said radio telephone, to said second exchange; said second exchange comprises; second registration means for recording the identification code of said radio telephone and information indicating that said second exchange is a visitor exchange of said radio telephone, when said radio telephone is a visitor radio telephone of said second exchange, upon receipt of said position registration request signal through said second radio connection controller, and terminal movement notification signal transmission means for transmitting a terminal movement notification signal to said network with the identification code of said radio telephone and an identification code of said second exchange when the identification code of said radio telephone is registered in said second registration means; said first exchange comprises; first registration means for registering the identification code of said radio telephone with information that said first exchange is the home exchange of said radio telephone, and further registering an identification code of said second exchange as a visitor exchange in correspondence with the identification code of said radio telephone upon receipt of said terminal movement notification signal including the identification code of the said radio telephone and the identification of the said second exchange from said second exchange through said network in the case where the identification code of said radio telephone added in said terminal movement notification signal corresponds to the identification code of said radio telephone recorded in said first registration means and the information that said first exchange is the home exchange of said radio telephone has been recorded therein, visitor exchange registration determination means for determining whether the identification code of said second exchange has been registered or not as said visitor exchange in said first registration means in correspondence to said radio telephone by referring to said first registration means, upon receipt of an incoming call to said radio telephone, transfer means for transferring the incoming call to said second exchange when the identification code of said second exchange has been registered as a visitor exchange in correspondence to said radio telephone as a result of the determination by said visitor exchange registration determination means, and first connecting means for connecting the incoming call to said radio telephone through said first radio connection controller when the identification code of said second exchange has not been registered as a visitor exchange in correspondence to said radio telephone as a result of the determination by said visitor exchange registration determination means, and further that the identification code of said radio telephone has been recorded in said first registration means together with information that said first exchange is the home exchange of said radio telephone; said second exchange further comprises; second connecting means for connecting the incoming call to said radio telephone through said second radio connection controller, referring to said second registration means upon receipt of the incoming call transferred by said transfer means if the identification code of said radio telephone has been registered in said second registration means; wherein said terminal movement notification signal transmission means transmits said terminal movement notification signal to said first and third exchanges through said network; wherein said first exchange refers to said first registration means upon receipt of said terminal movement notification signals and transmits an answer signals including the identification code of said first exchange;
to said second exchange if the identification of said radio telephone has been registered as well as information indicating that it is the home exchange of said radio telephone; andwherein said third exchange does not transmit said answer signal to said second exchange. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A private network system, comprising:
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a plurality of exchanges for exchanging telephone calls; a plurality of radio telephones, whose home exchanges are respectively selected from said plurality of exchanges, said plurality of radio telephones each comprising position registration request signal transmission means for transmitting a position registration request signal including an identification code of each of said plurality of radio telephones, respectively; and a plurality of radio connection controllers, each of which are respectively connected to any one of said plurality of exchanges, said plurality of radio connection controllers each transmitting said position registration request signal to one of said plurality of exchanges connected thereto respectively, upon receipt of said position registration request signal from each of said plurality of radio telephones, each of said plurality of exchanges comprises; home recording means for recording an identification code of a radio telephone whose home exchange is one of said plurality of exchanges; visitor recording means for recording an identification code of a radio telephone whose visitor exchange is one of said plurality of exchanges; visitor registration means for registering an identification code of said radio telephone included in said position registration request signal in said visitor recording means when the identification code included in said position registration request signal is not recorded in said home recording means upon receipt of said position registration request signal through the radio connection controller connected to one of said plurality of exchanges, terminal movement notification signal transmission means for transmitting a terminal movement notification signal including the identification code of said radio telephone and the identification code of the visited exchange, the identification code of said radio telephone included in said position registration request signal is not recorded in said home recording means upon receipt of said position registration request signal through the radio connection controller connected to one of said plurality of exchanges, exchange registration means for registering the identification code of the visited exchange included in said terminal movement notification signal in said home recording means in correspondence to the identification code of said radio telephone upon receipt of a terminal movement notification signal from the visited exchange, said terminal movement notification signal including the identification code of said radio telephone whose home exchange is one said plurality of exchanges, home switching means for connecting an incoming call upon receipt thereof which is directed to said radio telephone whose identification code is recorded in said home recording means and no exchange is registered in correspondence to the identification code of said radio connection controller connected to one of said plurality of exchanges, transfer means for transferring the incoming call upon receipt thereof to the visited exchange, when the incoming call is directed to a radio telephone, whose identification code is recorded in said home recording means and the identification code for the visited exchange is registered in correspondence to the identification code of said radio telephone in said home recording means, the visited exchange being registered in said home recording means in correspondence to the identification code of said radio telephone, and visitor switching means for connecting an incoming call which is transferred from the home exchange and which is directed to a radio telephone whose identification code is recorded in said visitor recording means, to said radio telephone through a radio connection controller connected to the visited exchange; wherein said terminal movement notification signal transmission means transmits said terminal movement notification signal to each of the plurality of exchanges; wherein said home exchange refers to said home recording means upon receipt of said terminal movement notification signal, and transmits an answer signal;
including the identification code of said home exchange;
to said visited exchange if the identification of said radio telephone has been registered as well as information indicating that it is the home exchange of said radio telephone; andwherein all the plurality of exchanges do not transmit said answer signal to said visited exchange except for said home exchange. - View Dependent Claims (14)
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Specification