Secure and seamless WAN-LAN roaming

• US 7,978,655 B2
• Filed: 07/21/2004
• Issued: 07/12/2011
• Est. Priority Date: 07/22/2003
• Status: Active Grant

• Current Assignee: Telcordia Legacy Inc.
• Original Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson), Toshiba America Research Inc (Toshiba Corporation)
• Inventors: Ohba, Yoshihiro, Madhani, Sunil, Taniuchi, Kenichi, Baba, Shinichi, Agrawal, Prathima, Fujimoto, Kensaku, Katsube, Yasuhiro, Kodama, Toshikazu, Zhang, Tao, Dutta, Ashutosh
• Primary Examiner(s): Patel; Ajit
• Assistant Examiner(s): NGUYEN, KHAI MINH
• Application Number:
  US10/895,411
• Publication Number:
  US 20050163079A1
• Time in Patent Office: 2,547 Days
• Field of Search: 455/436, 455/437, 455/439, 455/442, 455/432.1, 455/435.1, 455/435.2, 455/435.3, 455/410, 455/419, 455/433, 455/422.1, 370328-338, 370/392, 370/395.52, 370/419, 370/400
• US Class Current: 370/331
• CPC Class Codes: H04L 63/02 for separating internal from external traffic, e.g. firewalls
• CPC Class Codes: H04L 63/0272 Virtual private networks
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/1458 Denial of Service
• CPC Class Codes: H04L 63/164 at the network layer
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04W 12/069 using certificates or pre-shared keys
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 80/045 involving different protocol versions, e.g. MIPv4 and MIPv6
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Systems and methods are described for secure and seamless roaming between internal and external networks. Double and triple tunnels may be used to connect a mobile node to a correspondent host. A mobile node may include the ability to connect to two networks simultaneously to enable seamless roaming between networks.

Claims

1. A system comprising:

an internal mobile IP driver directly connected to a first network driver;

an external mobile IP driver directly connected to said first network driver and directly connected to a second network driver,

wherein

said first network driver is directly connected to a first physical network adapter configured to interface to a first network of a first type,

said second network driver is directly connected to a second physical network adapter configured to interface to a second network of a second type, and

a controller controls said internal mobile IP driver and said external mobile IP driver.

2. The system according to claim 1, wherein said internal mobile IP driver is directly connectable to said second network driver.

3. The system according to claim 1, further comprising a VPN driver connectable between said internal mobile IP driver and said external mobile IP driver.

4. The system according to claim 1, wherein said internal mobile IP driver and said external mobile IP driver are directly connected to each other.

5. A system comprising:

a TCP/IP controller;

an internal mobile IP driver directly connected to a first network driver;

an external mobile IP driver directly connected to said first network driver and directly connected to a second network driver,

wherein

said first network driver is directly connected to a first physical network adapter configured to interface to a first network of a first type,

said second network driver is directly connected to a second physical network adapter configured to interface to a second network of a second type, and

said external mobile IP driver connects to said second network with said second network driver before said internal mobile IP driver disconnects from said first network through said first network driver.

6. The system according to claim 5, further comprising:

a VPN driver.

7. The system according to claim 6, wherein said VPN driver is connectable between said internal mobile IP driver and said external mobile IP driver.

8. The system according to claim 6, wherein said internal mobile IP driver and said external mobile IP driver are directly connected to each other.