EP0917320A2
Expired / Lapsed
EP
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Optimum routing system
Assignee: Nokia of America Corp
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Filing: 1998-10-13
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Granted: —
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Expires: 2018-10-13
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 Choo Chuah
- 👤 Girish Rai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 12:26
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: 10
Claim 1
Independent Claim
188 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 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
46 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 3
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 4
Dependent Claim
46 words
The data network of claim 3, 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 5
Dependent Claim
73 words
The data network of claim 4, 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 6
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 7
Dependent Claim
39 words
The method of claim 6, 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 8
Dependent Claim
56 words
The method of claim 6 or the network of claim 1 or claim 3 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
40 words
The method of claim 6 or the network of claim 1 or claim 3 , 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 10
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 server 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.
References Cited (Backward Citations)
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