US6400722B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optimum routing system
Assignee: Nokia of America Corp
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Filing: 1998-08-24
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Granted: 2002-06-04
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Expires: 2018-08-24
Abstract
Abstract A wireless data network includes a wireless packet switched data network for end users that divides mobility management into local, micro, macro and global connection handover categories and minimizes handoff updates according to the handover category. The network integrates MAC handoff messages with network handoff messages. The network separately directs registration functions to a registration server and direct routing functions to inter-working function units. The network provides an intermediate XTunnel channel between a wireless hub (also called access hub AH) and an inter-working function unit (IWF unit) in a foreign network, and it provides an IXTunnel channel between an inter-working function unit in a foreign network and an inter-working function unit in a home network. The network enhances the layer two tunneling protocol (L2TP) to support a mobile end system, and it performs network layer registration before the start of a PPP communication session.
Inventors
- 👤 Mooi Chuah
- 👤 Girish Rai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:45
CPC Classifications
H; H04; H04W; H04W8/00; H04W8/02; H04W8/08; H04W8/12; H04L; H04L12/00; H04L12/28; H04L12/46; H04L12/4633; H04L69/00; H04L69/16; H04L69/161; H04L69/164; H04L69/168; H04L69/169; H04M; H04M15/00; H04M15/51; H04M15/70; H04M15/75; H04M15/765; H04M15/7655; H04M15/77; H04M15/772; H04M15/773; H04W36/00; H04W36/0005; H04W36/0011; H04W36/0019; H04W4/00; H04W4/24; H04L2212/00; H04M2215/00; H04M2215/32; H04M2215/54; H04M2215/72; H04M2215/724; H04M2215/725; H04M2215/7254; H04M2215/7263; H04M2215/7268; H04W36/14; H04W80/00; H04W80/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
184 words
A coupled data network comprising: a foreign network that includes a base station, a wireless hub, and a foreign mobile switching center with a serving registration server, and a serving inter-working function; a home network that includes a home mobile switching center with a home registration server and a home inter-working function; and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, the registration request including an indication of a desired communications network having a desired communications server, the end system sending the registration request to the serving registration server, the serving registration server including a first module to process the registration request and to determine an optimum route between the desired communications server and one of the home inter-working function and the serving inter-working function, the serving registration server further including a second module to link the serving inter-working function to the desired communications server when the first module determines that the optimum route is between the serving inter-working function and the desired communications server.
Claim 2
Dependent Claim
184 words
A coupled data network comprising: a foreign network that includes a base station, a wireless hub, and a foreign mobile switching center with a serving registration server, and a serving inter-working function; a home network that includes a home mobile switching center with a home registration server and a home inter-working function; and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, the registration request including an indication of a desired communications network having a desired communications server, the end system sending the registration request to the serving registration server, the serving registration server including a first module to process the registration request and to determine an optimum route between the desired communications server and one of the home inter-working function and the serving inter-working function, the serving registration server further including a second module to link the serving inter-working function to the desired communications server when the first module determines that the optimum route is between the serving inter-working function and the desired communications server.
Claim 3
Dependent Claim
47 words
The data network of claim 1 , wherein the serving registration server further includes a third module to send to the home registration server the registration request with an appended indication that the service registration server has linked the serving inter-working function and the desired communications server.
Claim 4
Dependent Claim
47 words
The data network of claim 1 , wherein: the desired communications server is one communication server of a plurality of communications servers in the desired communications network; and the first module includes a sub-module to determine the desired communications server from among the plurality of communications servers.
Claim 5
Dependent Claim
32 words
The data network of claim 1 , wherein said home network and said foreign network share billing information for the end system when the end system is operating in the foreign network.
Claim 6
Dependent Claim
204 words
A coupled data network comprising: a foreign network that includes a base station and a foreign mobile switching center with a serving registration server, the base station including an access hub with a serving inter-working function; a home network that includes a home mobile switching center with a home registration server and a home inter-working function; and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, the registration request including and indication of a desired communications network having a desired communications server, the end system sending the registration request to the serving registration server, the serving registration server including a first module to process the registration request and to determine an optimum route between the desired communications server and one of the home inter-working function and the serving inter-working function, the serving registration server further including a second module to send to the home registration server the registration request with a first appended indication that the serving registration server has determined that the optimum route is between the serving inter-working function and the desired communications server and a second appended indication that route optimization is preferred.
Claim 7
Dependent Claim
204 words
A coupled data network comprising: a foreign network that includes a base station and a foreign mobile switching center with a serving registration server, the base station including an access hub with a serving inter-working function; a home network that includes a home mobile switching center with a home registration server and a home inter-working function; and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, the registration request including and indication of a desired communications network having a desired communications server, the end system sending the registration request to the serving registration server, the serving registration server including a first module to process the registration request and to determine an optimum route between the desired communications server and one of the home inter-working function and the serving inter-working function, the serving registration server further including a second module to send to the home registration server the registration request with a first appended indication that the serving registration server has determined that the optimum route is between the serving inter-working function and the desired communications server and a second appended indication that route optimization is preferred.
Claim 8
Dependent Claim
49 words
The data network of claim 5 , wherein: the desired communications server is one communication server of a plurality of communications servers in the desired communications network; and the first module includes a sub-module to determine the select the desired communications server from among the plurality of communications servers.
Claim 9
Dependent Claim
47 words
The data network of claim 5 , wherein the serving registration server includes a third module to establish a link between the serving inter-working function and the desired communications processor after sending the registration request and the first and second appended indications to the home registration server.
Claim 10
Dependent Claim
74 words
The data network of claim 7 , wherein: the home registration server includes a fourth module to send a registration reply to the serving registration server, the registration reply including an indication of that the link between the serving inter-working function and the desired communications server is approved; and the home registration server further includes a fifth module to instruct the home inter-working function to transfer a link state to the serving inter-working function.
Claim 11
Dependent Claim
32 words
The data network of claim 5 , wherein said home network and said foreign network share billing information for the end system when the end system is operating in the foreign network.
Claim 12
Independent Claim
201 words
A method for optimizing routing in a coupled data network wherein the coupled data network comprises a foreign network that includes a base station and a foreign mobile switching center with a serving registration server, the base station including an access hub with a serving inter-working function, a home network that includes a home mobile switching center with a home registration server and a home inter-working function, and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, comprising the steps of: generating a registration request at the end system, said registration request including an indication of a desired communications network having a desired communications server; sending the registration request from the end system to the serving registration server; processing the registration request in a first module in the serving registration server to determine an optimum route between the desired communications server and one of the home inter-working function and the serving inter-working function; linking the serving inter-working function to the desired communications server when the first module determines that the optimum route is between the serving inter-working function and the desired communications server.
Claim 13
Independent Claim
201 words
A method for optimizing routing in a coupled data network wherein the coupled data network comprises a foreign network that includes a base station and a foreign mobile switching center with a serving registration server, the base station including an access hub with a serving inter-working function, a home network that includes a home mobile switching center with a home registration server and a home inter-working function, and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, comprising the steps of: generating a registration request at the end system, said registration request including an indication of a desired communications network having a desired communications server; sending the registration request from the end system to the serving registration server; processing the registration request in a first module in the serving registration server to determine an optimum route between the desired communications server and one of the home inter-working function and the serving inter-working function; linking the serving inter-working function to the desired communications server when the first module determines that the optimum route is between the serving inter-working function and the desired communications server.
Claim 14
Dependent Claim
40 words
The method of claim 10 , further comprising the step of: sending to the home registration server the registration request with an appended indication that the service registration server has linked the serving inter-working function and the desired communications server.
Claim 15
Dependent Claim
45 words
The method of claim 10 wherein: the desired communications server is one communication server of a plurality of communications servers in the desired communications network; and the first module includes a sub-module to determine the desired communications server from among the plurality of communications servers.
Claim 16
Dependent Claim
31 words
The method of claim 10 , wherein said home network and said foreign network share billing information for the end system when the end system is operating in the foreign network.
Claim 17
Independent Claim
207 words
A method for optimizing routing in a coupled data network wherein the coupled data network comprises a foreign network that includes a base station and a foreign mobile switching center with a serving registration server, the base station including an access hub with a serving inter-working function, a home network that includes a home mobile switching center with a home registration server and a home inter-working function, and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, comprising the steps of: generating a registration request at the end system, said registration request including an indication of a desired communications network having a desired communications server; sending the registration request from the end system to the serving registration server; determining whether the serving inter-working function or the home inter-working function is closer to the desired communications server; instructing the serving inter-working function to establish a connection to the desired communications server when the serving inter-working function is closer to the desired communications server than the home inter-working function; informing the home registration server that the end system is being served by the serving inter-working function and the desired communications server.
Claim 18
Independent Claim
207 words
A method for optimizing routing in a coupled data network wherein the coupled data network comprises a foreign network that includes a base station and a foreign mobile switching center with a serving registration server, the base station including an access hub with a serving inter-working function, a home network that includes a home mobile switching center with a home registration server and a home inter-working function, and an end system subscribed to the home network and operating within the foreign network, the end system including an end registration agent to form a registration request, comprising the steps of: generating a registration request at the end system, said registration request including an indication of a desired communications network having a desired communications server; sending the registration request from the end system to the serving registration server; determining whether the serving inter-working function or the home inter-working function is closer to the desired communications server; instructing the serving inter-working function to establish a connection to the desired communications server when the serving inter-working function is closer to the desired communications server than the home inter-working function; informing the home registration server that the end system is being served by the serving inter-working function and the desired communications server.
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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) | 2005-06-03 | 2005-12-03 | 2006-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-03 | 2009-12-03 | 2010-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-03 | 2013-12-03 | 2014-06-04 | $7700.00 | Window Closed / Lapsed |