Patent EP0454648A2 successfully refreshed from Google Patents.
EP0454648A2
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EP
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Multi-exchange paging system for locating a mobile telephone in a wide area telephone network
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1991-04-25
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Granted: —
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Expires: 2011-04-25
Abstract
Abstract A mobile communications system in which a mobile subscriber (12) may roam includes a number of exchanges (4,8,14,..) having coverage areas in which the mobile subscriber may roam. An interrogation exchange (4) receives incoming calls to the mobile subscriber and requests information as to the location of the mobile subscriber from its home exchange (8). 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.
Inventors
- 👤 Nancy Buhl
- 👤 John Hayes
- 👤 Harald Kallin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
H; H04; H04W; H04W68/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
122 words
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 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; 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.
Claim 2
Dependent Claim
35 words
A page controller for a mobile radiotelephone network as set forth in claim 1 which also includes: second means coupled to said paging means for detecting a page response sent by said specific mobile subscriber.
Claim 3
Dependent Claim
49 words
A page controller for a mobile radiotelephone network as set forth in claim 1 wherein each subscriber is associated with one of said exchanges and said page controller is located in each of said exchanges; and said storing means is located in a page controller associated with each exchange.
Claim 4
Dependent Claim
32 words
A page controller for a mobile radiotelephone network as set forth in claim 1 wherein said storage means is located in a page controller which is part of a home location register.
Claim 5
Dependent Claim
60 words
A page controller for a mobile radiotelephone network according to Claim 1 wherein said list of locations includes the current registered location of said each one of the mobile subscribers and at least one of the locations where said each one of the mobile subscribers has been previously registered, has originated calls therefrom, or has transmitted a page response therefrom.
Claim 6
Dependent Claim
86 words
In a mobile radio telephone network, a method of locating a specific mobile subscriber comprising the steps of: 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; 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.
Claim 7
Dependent Claim
37 words
A method of locating a specific mobile subscriber as set forth in claim 6 in which said page response is detected from a subscriber located in a specific one of said one or more locations being paged.
Claim 8
Dependent Claim
20 words
A method according to Claim 6 wherein said step of paging includes simultaneously paging in said one or more locations.
Claim 9
Dependent Claim
20 words
A method according to Claim 6 wherein said step of paging includes sequentially paging in said one or more locations.
Claim 10
Dependent Claim
80 words
A mobile communications system in which at least one mobile subscriber may roam, said system comprising: a plurality of exchanges having coverage areas in which said at least one mobile subscriber may be located; an interrogation exchange that receives incoming calls to said at least one mobile subscriber; and a home exchange of said at least one mobile subscriber, said home exchange including a memory for storing a list of possible locations at which said mobile subscriber may be found.
Claim 11
Dependent Claim
23 words
A system as recited in claim 10, wherein said list comprises an indication of a likely exchange and indications of additional, possible exchanges.
Claim 12
Dependent Claim
16 words
A system as recited in claim 10, wherein said home exchange is also the interrogation exchange.
Claim 13
Dependent Claim
20 words
A system as recited in claim 10, further comprising means for updating said list based upon occurrence of certain events.
Claim 14
Dependent Claim
18 words
A system as recited in claim 13, wherein said certain events comprise passage of certain amounts of time.
Claim 15
Dependent Claim
17 words
A system as recited in claim 10, wherein said list is used to page said mobile subscriber.
Claim 16
Independent Claim
65 words
A method of locating a mobile subscriber that may roam within the individual coverage areas of a plurality of exchanges comprising the steps of: maintaining a list of at least two exchanges having coverage areas in which said mobile subscriber may be located; and issuing a page for said mobile subscriber in the coverage area of at least one of the exchanges on said list.
Claim 17
Dependent Claim
20 words
A method as recited in claim 16, wherein said list comprises a most likely exchange identification and possible exchanges identifications.
Claim 18
Dependent Claim
36 words
A method as recited in claim 17, wherein said step of issuing a page comprises the steps of issuing a page in said most likely exchange prior to issuing a page in said other possible exchanges.
Claim 19
Dependent Claim
28 words
A method as recited in claim 16, wherein said step of issuing a page comprises the step of simultaneously issuing a page in all exchanges on said list.
Claim 20
Dependent Claim
36 words
A method as recited in claim 18 wherein said step of issuing a page in said other possible exchanges comprises the step of simultaneously issuing a page on all the other possible exchanges in the list.
Claim 21
Independent Claim
115 words
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: 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; 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.
Claim 22
Dependent Claim
41 words
A method for directing a call to a mobile subscriber as in claim 21 which includes the steps of: notifying the calling party of call failure without routing of the call when the mobile subscriber cannot be located within an exchange.
Claim 23
Dependent Claim
32 words
A method for directing a call to a mobile subscriber as in claim 21 wherein the step of selectively paging said mobile subscriber comprises simultaneously paging in said plurality of additional exchanges.
Claim 24
Dependent Claim
32 words
A method for directing a call to a mobile subscriber as in claim 21 wherein the step of selectively paging said mobile subscriber comprises sequential paging in said plurality of additional exchanges.
Claim 25
Dependent Claim
43 words
A method for directing a call to a mobile subscriber as in claim 21 wherein the step of determining a present exchange within which said mobile subscriber is presently located comprises the step of detecting an unambiguous page response from said mobile subscriber.
Claim 26
Dependent Claim
43 words
A method for directing a call to a mobile subscriber as in claim 21 wherein the step of determining a present exchange within which said mobile subscriber is presently located comprises the step of successfully connecting a voice channel to said mobile subscriber.
References Cited (Backward Citations)
No citation records indexed.
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