Patent DE878395C successfully refreshed from Google Patents.
US6256497B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interworking between telecommunications networks
Assignee: DBSD Services Ltd
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Filing: 1998-03-24
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Granted: 2001-07-03
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Expires: 2018-03-24
Abstract
Abstract A mobile telephone (UT 1 ) is configured for dual mode operation, so as to communicate either via an earth-orbiting satellite 3 a with a satellite network (SAN 1 ) or through a conventional land-based cellular network (PLMN 9 ). In order to provide interworking between the satellite network and the land, cellular network 9 , an interworking function (IWF 31 ) provides data to the cellular network 9 concerning the location of the user terminal (UT 1 ) in relation to the satellite network. The data is transmitted from the satellite visitor location register (VLR SAT 1 ) to the home location register (HLR) of the cellular network 9 . The IWF maintains a list of roaming subscribers provisioned with services which are specific to the visited network and not available in the home network. The (IWF 31 ) is configured to operate with local GSM, DAMPS, PHS or other local land-based networks, depending on the geographic location of the SAN.
Inventors
- 👤 Paul Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:40
CPC Classifications
H; H04; H04W; H04W92/00; H04W92/02; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18563; H04W84/00; H04W84/02; H04W84/04; H04W84/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
321 words
Mobile telecommunications apparatus including: a first mobile telecommunications network for use with a mobile user terminal for a subscriber to the first network, the first network including a home location register for maintaining a record of the network with which the subscriber is currently registered; a second mobile telecommunications network to which the subscriber's user terminal can roam, the second network including at least one visitor location register with which the user terminal becomes registered when roaming to the second network, and the second network offering a service to the subscriber not available through the first network; and an interworking function unit has been for providing interworking between the first and second networks, including: an interworking home location register to maintain a record of when the subscriber's user terminal becomes registered with a visitor location register of the second network and those of the services of the second network to which the subscriber is permitted access, whereby when the user terminal has roamed to the second network and registered with a visitor location register of the second network, the visitor location register is provided with data corresponding to said services to which access is permitted from the interworking function unit, and an interworking visitor location register coupled to the interworking home location register, the interworking visitor location register being operable to communicate to the home location register of the first network that the subscriber's user terminal has become registered with the visitor location register of the second network whereby when the user terminal has roamed to the second network and registered with the visitor location register of the second network, a call may be routed to the user terminal through the second network by being directed to the home location register of the first network such that the home location register obtains routing information through the interworking function unit for routing the call to the user terminal through the second network.
Claim 2
Dependent Claim
321 words
Mobile telecommunications apparatus including: a first mobile telecommunications network for use with a mobile user terminal for a subscriber to the first network, the first network including a home location register for maintaining a record of the network with which the subscriber is currently registered; a second mobile telecommunications network to which the subscriber's user terminal can roam, the second network including at least one visitor location register with which the user terminal becomes registered when roaming to the second network, and the second network offering a service to the subscriber not available through the first network; and an interworking function unit has been for providing interworking between the first and second networks, including: an interworking home location register to maintain a record of when the subscriber's user terminal becomes registered with a visitor location register of the second network and those of the services of the second network to which the subscriber is permitted access, whereby when the user terminal has roamed to the second network and registered with a visitor location register of the second network, the visitor location register is provided with data corresponding to said services to which access is permitted from the interworking function unit, and an interworking visitor location register coupled to the interworking home location register, the interworking visitor location register being operable to communicate to the home location register of the first network that the subscriber's user terminal has become registered with the visitor location register of the second network whereby when the user terminal has roamed to the second network and registered with the visitor location register of the second network, a call may be routed to the user terminal through the second network by being directed to the home location register of the first network such that the home location register obtains routing information through the interworking function unit for routing the call to the user terminal through the second network.
Claim 3
Dependent Claim
24 words
The apparatus according to claim 1 wherein the first network is selected from the group comprising a GSM, DAMPS,PHS, PDC and a UMTS network.
Claim 4
Dependent Claim
42 words
Apparatus according to claim 1 wherein the second network includes a plurality of visitor location registers and the interworking home location register is operable to keep a record of which of the visitor location registers with which the user terminal is registered.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 1 wherein the first network comprises a land based mobile network and the second network comprises a satellite telecommunications network.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 1 wherein the service comprises a high power notification (HPN) service.
Claim 7
Independent Claim
299 words
A method of interworking between first and second mobile telecommunications networks, for use with a mobile user terminal for a subscriber to the first network which can roam to the second network, the first network including a home location register for maintaining a record of the network with which the subscriber is currently registered, the second network including at least one visitor location register with which the user terminal becomes registered when roaming to the second network, and the second network offering a service to the subscriber not available through the first network; the method comprising: maintaining in an interworking home location register a record of when the subscriber's user terminal becomes registered with a visitor location register of the second network and those of the services of the second network to which the subscriber is permitted access, whereby when the user terminal has roamed to the second network and registered with a visitor location register of the second network, the visitor location register is provided with data corresponding to said services to which access is permitted, and maintaining an interworking visitor location register coupled to the interworking home location register, the interworking visitor location register being operable to communicate to the home location register of the first network that the subscriber's user terminal has become registered with the visitor location register of the second network whereby when the user terminal has roamed to the second network and registered with the visitor location register of the second network, a call may be routed to the user terminal through the second network by being directed to the home location register of the first network such that the home location register obtains routing information through the interworking function unit for routing the call to the user terminal through the second network.
Claim 8
Independent Claim
299 words
A method of interworking between first and second mobile telecommunications networks, for use with a mobile user terminal for a subscriber to the first network which can roam to the second network, the first network including a home location register for maintaining a record of the network with which the subscriber is currently registered, the second network including at least one visitor location register with which the user terminal becomes registered when roaming to the second network, and the second network offering a service to the subscriber not available through the first network; the method comprising: maintaining in an interworking home location register a record of when the subscriber's user terminal becomes registered with a visitor location register of the second network and those of the services of the second network to which the subscriber is permitted access, whereby when the user terminal has roamed to the second network and registered with a visitor location register of the second network, the visitor location register is provided with data corresponding to said services to which access is permitted, and maintaining an interworking visitor location register coupled to the interworking home location register, the interworking visitor location register being operable to communicate to the home location register of the first network that the subscriber's user terminal has become registered with the visitor location register of the second network whereby when the user terminal has roamed to the second network and registered with the visitor location register of the second network, a call may be routed to the user terminal through the second network by being directed to the home location register of the first network such that the home location register obtains routing information through the interworking function unit for routing the call to the user terminal through the second network.
Claim 9
Dependent Claim
308 words
An interworking function unit for providing interworking between first and second mobile telecommunications networks, for use with a mobile user terminal for a subscriber to the first network which can roam to the second network, the first network including a home location register for maintaining a record of the network with which the subscriber is currently registered, the second network including at least one visitor location register with which the user terminal becomes registered when roaming to the second network, and the second network offering a service to the subscriber not available through the first network; the interworking function unit comprising: an interworking home location register to maintain a record of when the subscriber's user terminal becomes registered with a visitor location register of the second network and those of the services of the second network to which the subscriber is permitted access, whereby when the user terminal has roamed to the second network and registered with a visitor location register of the second network, the visitor location register is provided from the interworking function unit with data corresponding to said services to which access is permitted, and an interworking visitor location register coupled to the interworking home location register, the interworking visitor location register being operable to communicate to the home location register of the first network that the subscriber's user terminal has become registered with the visitor location register of the second network whereby when the user terminal has roamed to the second network and registered with the visitor location register of the second network, a call may be routed to the user terminal through the second network by being directed to the home location register of the first network such that the home location register obtains routing information through the interworking function unit for routing the call to the user terminal through the second network.
Claim 10
Dependent Claim
308 words
An interworking function unit for providing interworking between first and second mobile telecommunications networks, for use with a mobile user terminal for a subscriber to the first network which can roam to the second network, the first network including a home location register for maintaining a record of the network with which the subscriber is currently registered, the second network including at least one visitor location register with which the user terminal becomes registered when roaming to the second network, and the second network offering a service to the subscriber not available through the first network; the interworking function unit comprising: an interworking home location register to maintain a record of when the subscriber's user terminal becomes registered with a visitor location register of the second network and those of the services of the second network to which the subscriber is permitted access, whereby when the user terminal has roamed to the second network and registered with a visitor location register of the second network, the visitor location register is provided from the interworking function unit with data corresponding to said services to which access is permitted, and an interworking visitor location register coupled to the interworking home location register, the interworking visitor location register being operable to communicate to the home location register of the first network that the subscriber's user terminal has become registered with the visitor location register of the second network whereby when the user terminal has roamed to the second network and registered with the visitor location register of the second network, a call may be routed to the user terminal through the second network by being directed to the home location register of the first network such that the home location register obtains routing information through the interworking function unit for routing the call to the user terminal through the second network.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-07-02 | 2005-01-01 | 2005-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-02 | 2009-01-01 | 2009-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-02 | 2013-01-01 | 2013-07-03 | $7700.00 | Window Closed / Lapsed |