US6452920B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile terminating L2TP using mobile IP data
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1998-12-30
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Granted: 2002-09-17
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Expires: 2018-12-30
Abstract
Abstract In accordance with embodiments of the invention, Mobile IP binding information is used to deliver mobile terminating packets using layer-2 tunneling. When terminating packets destined for a mobile node are received by a home network for the mobile node, the Mobile IP binding is used to obtain the address of a foreign network to which the mobile node is attached. A Layer 2 Tunneling Protocol tunnel is created between the home network and the foreign network, and an outgoing L2TP call is made from the home network to the foreign network. A call is made from the foreign network to the mobile node, and a PPP session is established between the home network and the mobile node, via the Layer 2 Tunneling Protocol tunnel between the home network and the foreign network. After the PPP session is established the home network can optionally assign the mobile node a private IP address, and translate the home IP address labeling the terminating packets to the private IP address.
Inventors
- 👤 David R. Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:45
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/46; H04L12/4633; H04L69/00; H04L69/16; H04L69/161; H04L69/168; H04L69/30; H04L69/32; H04L69/322; H04L69/324; H04W; H04W80/00; H04W80/04; Y; Y10; Y10S; Y10S370/00; Y10S370/901
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
A data network, comprising: a correspondent node; a mobile node; and a Mobile IP interface between the correspondent node and the mobile node, wherein the data network further comprises: a home network of the mobile node; a home agent within the home network; a Layer 2 Tunneling Protocol Network Server within the home network; a foreign network; a foreign agent within the foreign network; a Layer 2 Tunneling Protocol Access Concentrator within the foreign network; a Layer 2 Tunneling Protocol interface between the Layer 2 Tunneling Protocol Network Server and the Layer 2 Tunneling Protocol Access Concentrator; and a Point to Point Protocol interface between the home network and the mobile node through the Layer 2 Tunneling Protocol interface between the Layer 2 Tunneling Protocol Network Server and the Layer 2 Tunneling Protocol Access Concentrator.
Claim 2
Dependent Claim
135 words
A data network, comprising: a correspondent node; a mobile node; and a Mobile IP interface between the correspondent node and the mobile node, wherein the data network further comprises: a home network of the mobile node; a home agent within the home network; a Layer 2 Tunneling Protocol Network Server within the home network; a foreign network; a foreign agent within the foreign network; a Layer 2 Tunneling Protocol Access Concentrator within the foreign network; a Layer 2 Tunneling Protocol interface between the Layer 2 Tunneling Protocol Network Server and the Layer 2 Tunneling Protocol Access Concentrator; and a Point to Point Protocol interface between the home network and the mobile node through the Layer 2 Tunneling Protocol interface between the Layer 2 Tunneling Protocol Network Server and the Layer 2 Tunneling Protocol Access Concentrator.
Claim 3
Dependent Claim
23 words
The data network of claim 1 , wherein at least one of the home network and the foreign network is an operator's network.
Claim 4
Dependent Claim
24 words
The data network of claim 1 , wherein at least one of the home network and the foreign network is an Internet Service Provider.
Claim 5
Dependent Claim
23 words
The data network of claim 1 , wherein at least one of the home network and the foreign network is a corporate network.
Claim 6
Independent Claim
188 words
A method for using Mobile IP binding information and Layer 2 Tunneling Protocol tunneling to route packets from a correspondent node to a mobile node, comprising the steps of: receiving at a home network of the mobile node a packet from the correspondent node for routing to the mobile node through the home network, the home network corresponding to a destination address on the packet, wherein the destination address is a home address for the mobile node; determining a care-of address corresponding to a foreign network using the home address and the Mobile IP binding information for the mobile node; establishing a Layer 2 Tunneling Protocol tunnel between the home network and the foreign network; making a call from the foreign network to the mobile node; establishing a Point-to-Point Protocol session between the home network and the mobile node; encapsulating the received packet in accordance with the Layer 2 Tunneling Protocol for transmission through the Layer 2 Tunneling Protocol tunnel from the home network to the foreign network; and sending the encapsulated packet through the Layer 2 Tunneling Protocol tunnel from the home network to the foreign network.
Claim 7
Independent Claim
188 words
A method for using Mobile IP binding information and Layer 2 Tunneling Protocol tunneling to route packets from a correspondent node to a mobile node, comprising the steps of: receiving at a home network of the mobile node a packet from the correspondent node for routing to the mobile node through the home network, the home network corresponding to a destination address on the packet, wherein the destination address is a home address for the mobile node; determining a care-of address corresponding to a foreign network using the home address and the Mobile IP binding information for the mobile node; establishing a Layer 2 Tunneling Protocol tunnel between the home network and the foreign network; making a call from the foreign network to the mobile node; establishing a Point-to-Point Protocol session between the home network and the mobile node; encapsulating the received packet in accordance with the Layer 2 Tunneling Protocol for transmission through the Layer 2 Tunneling Protocol tunnel from the home network to the foreign network; and sending the encapsulated packet through the Layer 2 Tunneling Protocol tunnel from the home network to the foreign network.
Claim 8
Dependent Claim
32 words
The method of claim 5 , further comprising the steps of: receiving the encapsulated packet at the foreign network; decapsulating the received packet; and forwarding the decapsulated packet to the mobile node.
Claim 9
Independent Claim
158 words
A method for transmitting data packets to a mobile node across at least one internetwork, comprising the steps of: receiving at a home network of the mobile node a data packet bearing a first Internet Protocol address and intended for terminal delivery to the mobile node; encapsulating the data packet and the first Internet Protocol address using Point to Point Protocol to create a first message capsule; encapsulating the first message capsule with a second Internet Protocol address designating a foreign network connected to the mobile node to create a second message capsule in accordance with Layer 2 Tunneling Protocol; forwarding the second message capsule from the home network to the foreign network via a Layer 2 Tunneling Protocol tunnel between the home network and the foreign network; decapsulating the second message capsule at the foreign network to recover the first message capsule; and forwarding the recovered first message capsule from the foreign network to the mobile node.
Claim 10
Independent Claim
158 words
A method for transmitting data packets to a mobile node across at least one internetwork, comprising the steps of: receiving at a home network of the mobile node a data packet bearing a first Internet Protocol address and intended for terminal delivery to the mobile node; encapsulating the data packet and the first Internet Protocol address using Point to Point Protocol to create a first message capsule; encapsulating the first message capsule with a second Internet Protocol address designating a foreign network connected to the mobile node to create a second message capsule in accordance with Layer 2 Tunneling Protocol; forwarding the second message capsule from the home network to the foreign network via a Layer 2 Tunneling Protocol tunnel between the home network and the foreign network; decapsulating the second message capsule at the foreign network to recover the first message capsule; and forwarding the recovered first message capsule from the foreign network to the mobile node.
Claim 11
Independent Claim
26 words
The method of 7 , further comprising the step of determining the second Internet Protocol address based on Mobile IP binding information for the mobile node.
Claim 12
Independent Claim
26 words
The method of 7 , further comprising the step of determining the second Internet Protocol address based on Mobile IP binding information for the mobile node.
Claim 13
Independent Claim
23 words
The method of 7 , further comprising the step of determining the second Internet Protocol address based on the first Internet Protocol address.
Claim 14
Independent Claim
23 words
The method of 7 , further comprising the step of determining the second Internet Protocol address based on the first Internet Protocol address.
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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) | 2005-09-16 | 2006-03-18 | 2006-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-16 | 2010-03-18 | 2010-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-16 | 2014-03-18 | 2014-09-17 | $7700.00 | Window Closed / Lapsed |