Multi-exchange paging system for locating a mobile telephone in a wide area telephone network
First Claim
1. In a mobile radio telephone network comprising a plurality of mobile telephone exchanges, each assigned to one of a plurality of local areas, said network further comprising a plurality of mobile subscribers, a page controller connected to each of said exchanges including:
- means for storing, in correspondence with each one of the mobile subscribers, a list of locations where said each one of the mobile subscribers may possibly be found, said list comprising a most likely exchange identification and possible exchanges identifications;
first means for detecting the arrival of an incoming call signal indicating that a call has been placed to a specific one of said mobile subscribers; and
paging means coupled to said first detecting means for paging said specific mobile subscriber in one or more locations indicated by said list of locations corresponding to said specific mobile subscriber,wherein said paging comprises issuing a page in said most likely exchange prior to issuing a page in said other possible exchanges, and wherein issuing a page in said other possible exchanges is effected simultaneously.
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0 Petitions
Accused Products
Abstract
A mobile communications system in which a mobile subscriber may roam includes a number of exchanges having coverage areas in which the mobile subscriber may roam. An interrogation exchange receives incoming calls to the mobile subscriber and requests information as to the location of the mobile subscriber from its home exchange. The home exchange includes a list of a plurality of possible exchanges in which the mobile subscriber may be located which is used to supply information as to the location of the mobile subscriber. The home exchange initiates and coordinates the paging process and reacts according to the outcome of this process.
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Citations
24 Claims
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1. In a mobile radio telephone network comprising a plurality of mobile telephone exchanges, each assigned to one of a plurality of local areas, said network further comprising a plurality of mobile subscribers, a page controller connected to each of said exchanges including:
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means for storing, in correspondence with each one of the mobile subscribers, a list of locations where said each one of the mobile subscribers may possibly be found, said list comprising a most likely exchange identification and possible exchanges identifications; first means for detecting the arrival of an incoming call signal indicating that a call has been placed to a specific one of said mobile subscribers; and paging means coupled to said first detecting means for paging said specific mobile subscriber in one or more locations indicated by said list of locations corresponding to said specific mobile subscriber, wherein said paging comprises issuing a page in said most likely exchange prior to issuing a page in said other possible exchanges, and wherein issuing a page in said other possible exchanges is effected simultaneously. - View Dependent Claims (2, 3, 4, 5)
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6. In a mobile radio telephone network, a method of locating a specific mobile subscriber comprising the steps of:
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detecting an incoming call signal indicating that a call has been placed to said specific mobile subscriber; paging said specific mobile subscriber in one or more locations indicated by a list of possible locations stored in a memory, said list comprising a most likely exchange identification and possible exchanges identifications; detecting a page response transmitted by said specific mobile subscriber; and routing said call to said specific mobile subscriber in the specific location from which the page response was detected, wherein said paging comprises issuing a page in said most likely exchange prior to issuing a page in said other possible exchanges, and wherein issuing a page in said other possible exchanges is effected simultaneously. - View Dependent Claims (7, 8, 9, 10)
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11. A method of locating a mobile subscriber that may roam within the individual coverage areas of a plurality of exchanges comprising the steps of:
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maintaining a list of at least two exchanges having coverage areas in which said mobile subscriber may be located, said list comprising a most likely exchange identification and possible exchanges identification; and issuing a page for said mobile subscriber in the coverage area of at least one of the exchanges on said list, wherein said paging comprises issuing a page in said most likely exchange prior to issuing a page in said other possible exchanges, and wherein issuing a page in said other possible exchanges is effected simultaneously. - View Dependent Claims (12)
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13. A method for directing a call from an interrogation exchange to a mobile subscriber within a mobile communications network that includes a home exchange for said mobile subscriber and a plurality of additional exchanges wherein said mobile subscriber may be presently located, the method comprising:
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establishing a list of exchanges that includes information relating to said plurality of additional exchanges; selectively paging said mobile subscriber within at least one of said home exchange and said plurality of additional exchanges on said list; determining a present exchange within which said mobile subscriber is presently located; reporting said present exchange to said home exchange; and routing said call from the interrogation exchange to said mobile subscriber within said present exchange. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A page controller for locating a mobile subscriber associated with a home exchange in a cellular radio communications system, said page controller comprising:
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means for retrieving from a memory a plurality of values indicating the current registered location of said mobile subscriber and an uncertainty list of other possible locations in which the presence of said mobile subscriber has been recently detected; and means for initiating a page signal transmission in one or more of said locations after detection of a signal of an incoming call to said mobile subscriber and prior to routing of said incoming call to any of said locations, wherein said page controller is in said home exchange and said memory is in said page controller. - View Dependent Claims (20, 21)
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22. A page controller for locating a mobile subscriber associated with a home exchange in a cellular radio communications system, said page controller comprising:
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means for retrieving from a memory a plurality of values indicating the current registered location of said mobile subscriber and an uncertainty list of other possible locations in which the presence of said mobile subscriber has been recently detected; and means for initiating a page signal transmission in one or more of said locations after detection of a signal of an incoming call to said mobile subscriber and prior to routing of said call to any of said locations, wherein said page controller is in said home exchange and said memory is in said home exchange and said memory is in a home location register connected to said home exchange.
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23. A page controller for locating a mobile subscriber associated with a home exchange in a cellular radio communications system, said page controller comprising:
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means for retrieving from a memory a plurality of values indicating the current registered location of said mobile subscriber and an uncertainty list of other possible locations in which the presence of said mobile subscriber has been recently detected; and means for initiating a page signal transmission in one or more of said locations after detection of a signal of an incoming call of said mobile subscriber and prior to routing of said incoming call to any of said locations, wherein said means for initiating a page signal transmission in one or more of said locations comprises; first means for initiating said page signal transmission in said current registered location; and second means for initiating said page signal transmission in said other possible locations in parallel with one another; and third means for initiating said page signal transmission in said other possible locations in sequence with one another. - View Dependent Claims (24)
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Specification