EP0630166A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Mobile communication system making use of ISDN switched network
Assignee: NEC Corp
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Filing: 1994-06-15
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Granted: —
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Expires: 2014-06-15
Abstract
Abstract Base stations are connected to subscriber lines of neighboring ISDN local switches, and mobile subscriber connection control equipment connected to the subscriber line of a particular ISDN local switch manages mobile subscriber data register equipment. Connection of a call which originates from or terminates at a mobile station, registration of the location of the mobile station, and channel switching process during service are performed by way of the mobile subscriber connection control equipment using an ISDN subscriber interface. <IMAGE>
Inventors
- 👤 Junichi C/O Nec Corporation Owada
- 👤 Masahiko C/O Nec Corporation Yahagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 23:51
CPC Classifications
H; H04; H04W; H04W8/00; H04W8/02; H04W76/00; H04W76/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A mobile communication system which makes use of an ISDN switched network, comprising: mobile subscriber data register equipment for registering information regarding mobile subscribers including subscriber numbers of the mobile subscribers, subscriber data of the mobile subscribers, identification numbers of mobile stations, and location information of the mobile stations; a base station connected to a subscriber line of an ISDN local switch for performing radio link control of a mobile station to connect a call which is originated from or terminated at the mobile station to said ISDN switched network by way of the subscriber line; and mobile subscriber connection control equipment connected to a subscriber line of said ISDN local switch for managing said mobile subscriber data register equipment and controlling connection of a call which is originated from or terminated at a mobile station, registration of the location of a mobile station, and a channel switching process during service by way of the subscriber line.
Claim 2
Dependent Claim
227 words
A mobile communication system as claimed in claim 1 wherein, when a mobile station sends a call request for a fixed subscriber to a base station designating a called subscriber number and adding the identification number of the mobile station, the base station regenerates a call designating a subscriber number allocated to said mobile subscriber connection control equipment as a called number and adding said called subscriber number and said identification number as additional information, said mobile subscriber connection control equipment reads out and analyzes subscriber data corresponding to said identification number from said mobile subscriber data register equipment, and re-originates a call to said fixed subscriber; and when a fixed subscriber sends a call request designating a mobile subscriber number as a called number, the call is first terminated at said mobile subscriber connection control equipment, said mobile subscriber connection control equipment reads out and analyzes the identification number and the location information of the corresponding mobile station in accordance with the mobile subscriber number from said mobile subscriber data register equipment, determines at least one base station to be seized, and re-originates a call designating the subscriber number allocated to said base station and adding the mobile station identification number as additional information, and the base station alerts the mobile station in accordance with the identification number to terminate the call at the mobile station.
Claim 3
Dependent Claim
121 words
A mobile communication system as claimed in claim 1 wherein, when a mobile station detects a changing of location registration area and transmits a location registration request signal to a base station which belongs to the location registration area after the changing adding the identification number of said mobile station, said base station re-originates a call designating the subscriber number of said mobile subscriber connection control equipment as a called number and adding said identification number and said location registration request signal as additional information, and said mobile subscriber connection control equipment refers to said identification number and the calling number of said base station to update the location information of said mobile station in said mobile subscriber data register equipment.
Claim 4
Dependent Claim
294 words
A mobile communication system as claimed in claim 1 wherein, when a mobile station during service transmits a channel switching request signal to a base station which is in control designating an adjacent base station to which the mobile station desires to be connected, said base station which is in control originates a call to said mobile subscriber connection control equipment to report the occurrence of the channel switching request along with the identification number of said mobile station and said channel switchig request signal as additional information; said mobile subscriber connection control equipment originates a call to said adjacent base station to report information regarding the channel switching request and instructs said adjacent base station to secure a radio channel for switching; said adjacent base station stores the identification number of said mobile station and reports a securing condition of a radio channel for switching to said mobile subscriber connection control equipment using an alerting signal; said mobile subscriber connection control equipment instructs, when it confirms that the radio channel for switching has been prepared, channel switching to said base station which is in control using an alerting signal adding the information of the radio channel for switching; said base station which is in control instructs said mobile station to perform switching of the radio channel; said mobile station performs switching of the radio channel in accordance with the switching instruction; and said adjacent base station reports, after confirming the switching of the radio channel, to said mobile subscriber connection control equipment using a signal of connection that the switching of the radio channel has been completed; and thereafter, said mobile subscriber connection control equipment disconnects the communication line which has become unnecessary as a result of the completion of the channel switching.
References Cited (Backward Citations)
No citation records indexed.
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