US20030103496A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Context filter in a mobile node
Assignee: Nokia Technologies Oy
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Filing: 2002-12-02
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Granted: —
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Expires: 2022-12-02
Abstract
Abstract In mobile IP networks, when a mobile node (MN) moves from one cell to another, handover occurs. The result of the handover is that the MN connects to the network through a new access router (AR). The handover may occur between access routers of the same or different administrative domains. In all cases, the information related to the mobile node has to be transferred from the old AR to the new AR in order to minimize the effect of the change of access routers.
Inventors
- 👤 Ram Lakshmi Narayanan
- 👤 Man Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:34
CPC Classifications
H; H04; H04L; H04L67/00; H04L67/2866; H04L67/30; H04L67/303; H04L45/00; H04L67/50; H04L67/60; H04L67/63; H04W; H04W12/00; H04W12/06; H04W12/062; H04W36/00; H04W36/12; H04W8/00; H04W8/22; H04W8/24; H04L69/00; H04L69/30; H04L69/32; H04L69/322; H04L69/329; H04W28/00; H04W28/16; H04W28/24; H04W36/0005; H04W36/0011; H04W36/0033; H04W36/0038; H04W36/08; H04W40/00; H04W40/34; H04W40/36; H04W80/00; H04W80/04; H04W92/00; H04W92/16; H04W92/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
75 words
1 . A method for distributing a first rest of context, said rest of context having a static content and a second rest of context, the method comprising the steps of: receiving a first rest of context from a first access router, extracting the static context from the first rest of context; forwarding a second rest of context to at least one NE; and sending a context transfer complete message to a second access router.
Claim 2
Dependent Claim
75 words
1 . A method for distributing a first rest of context, said rest of context having a static content and a second rest of context, the method comprising the steps of: receiving a first rest of context from a first access router, extracting the static context from the first rest of context; forwarding a second rest of context to at least one NE; and sending a context transfer complete message to a second access router.
Claim 3
Dependent Claim
33 words
2 . The method of claim 1 wherein the first access router is a component of a first autonomous system and the second access router is a component of a second autonomous system.
Claim 4
Dependent Claim
44 words
3 . The method of claim 2 wherein the step of receiving a first rest of context is preceded by the steps of: receiving a context transfer request from the first autonomous system; and forwarding the context transfer request to the second autonomous system.
Claim 5
Dependent Claim
35 words
4 . The method of claim 3 wherein the step of forwarding the context transfer request is followed by the step of: adding a first context with a second context to form all these contexts.
Claim 6
Dependent Claim
35 words
5 . The method of claim 4 wherein the step of adding the first context is followed by the step of: sending all these contexts from a first policy server to the second access router.
Claim 7
Dependent Claim
29 words
6 . The method of claim 5 wherein the step of sending all these contexts is followed by the step of: extracting a relevant context from all these contexts.
Claim 8
Dependent Claim
18 words
7 . The method of claim 1 wherein the at least one network element comprises a security gateway.
Claim 9
Dependent Claim
23 words
8 . The method of claim 1 further comprising the step of: forwarding the context transfer complete message to the first policy server.
Claim 10
Dependent Claim
44 words
9 . The method of claim 8 wherein the steps of receiving a first rest of context is preceded by the steps of: receiving a context transfer request from the first autonomous system; and forwarding the context transfer request to the second autonomous system.
Claim 11
Dependent Claim
123 words
10 . A method for forwarding a context comprising the steps of: adding the context with a second context to form all these contexts at a first policy server; sending all these contexts from the first policy server to a second access router; extracting a relevant context from all these contexts at the second access router; forwarding a rest of context from the second access router to a second policy server; extracting a static context at the second policy server; forwarding the static context to at least one network element; sending a context transfer complete message from the second policy server to a first access router; and forwarding the context transfer complete message from the first access router to the first policy server.
Claim 12
Dependent Claim
123 words
10 . A method for forwarding a context comprising the steps of: adding the context with a second context to form all these contexts at a first policy server; sending all these contexts from the first policy server to a second access router; extracting a relevant context from all these contexts at the second access router; forwarding a rest of context from the second access router to a second policy server; extracting a static context at the second policy server; forwarding the static context to at least one network element; sending a context transfer complete message from the second policy server to a first access router; and forwarding the context transfer complete message from the first access router to the first policy server.
Claim 13
Dependent Claim
59 words
11 . The method of claim 10 wherein the first policy server is a component of a first autonomous system, and the first access router is a component of a first autonomous system; and the second policy server is a component of a second autonomous system and the second access router is a component of the second autonomous system.
Claim 14
Dependent Claim
36 words
12 . The method of forwarding a context of claim 10 further comprising the steps of receiving the context from the second access router prior to the step of adding the context with a second context.
Claim 15
Dependent Claim
67 words
13 . The method of forwarding a context of claim 12 further comprising the steps of forwarding a context transfer request from the first policy server to a second autonomous system wherein the first policy server is a component of a first autonomous system and said step of forwarding a context transfer request occurs prior to the step of receiving the context from the second access router.
Claim 16
Dependent Claim
42 words
14 . The method of forwarding a context of claim 13 further comprising the steps of requesting a first policy server to send a context transfer request, said step of requesting occurring prior to the step of forwarding the context transfer request.
Claim 17
Dependent Claim
49 words
15 . The method of forwarding a context of claim 14 further comprising the steps of receiving an identity packet at the first access router, said step of receiving an identity packet occurring prior to the step of requesting the first policy server to send a context transfer request.
Claim 18
Dependent Claim
60 words
16 . A method of identifying, to a mobile node currently served by a first autonomous system, a list of at least one capable access router comprising the steps of: getting an identifier forwarding the identifier to a neighboring policy server; sending a message to the mobile node, said message having the list of at least one capable access router.
Claim 19
Dependent Claim
60 words
16 . A method of identifying, to a mobile node currently served by a first autonomous system, a list of at least one capable access router comprising the steps of: getting an identifier forwarding the identifier to a neighboring policy server; sending a message to the mobile node, said message having the list of at least one capable access router.
Claim 20
Dependent Claim
40 words
17 . The method of claim 16 , further comprising the steps of: determining if a second autonomous system can serve the mobile node and calculating the list of at least one access router that can serve the mobile node.
Claim 21
Dependent Claim
20 words
18 . The method of claim 16 wherein the step of getting an identifier comprises getting a link layer identifier.
Claim 22
Dependent Claim
20 words
19 . The method of claim 16 wherein the step of getting an identifier comprises getting an autonomous system number.
Claim 23
Dependent Claim
47 words
20 . The method of claim 19 wherein the step of forwarding an identifier is followed by the steps of: determining if a second autonomous system can serve the mobile node and calculating the list of at least one access router that can serve the mobile node.
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