METHOD AND APPARATUS FOR PROVIDING MOBILE IP SERVICE THROUGH A NETWORK ADDRESS TRANSLATION GATEWAY

• US 20140301411A1
• Filed: 06/17/2014
• Published: 10/09/2014
• Est. Priority Date: 07/26/2006
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Inventors: Strater, Jay
• Granted Patent: US 9,787,526 B2
• Time in Patent Office: Days
• US Class Current: 370/475
• CPC Class Codes: H04L 61/2546 Arrangements for avoiding unnecessary translation
• CPC Class Codes: H04L 61/2585 through application level gateway [ALG]
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server
• CPC Class Codes: H04W 8/24 Transfer of terminal data
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

Method and apparatus for providing Mobile internet protocol (IP) service through a network address translation gateway. In one example, a gateway between a local area network (LAN) and a wide area network (WAN) is provided. A foreign agent (FA) module is configured to advertise a care-of address (CoA) on the LAN and process registration and mobile IP communication traffic on the LAN and the WAN side of the gateway. A control module is configured to identify the registration and the mobile IP communication traffic on the LAN and the WAN. The control module sends mobile IP traffic to the FA and other traffic to a network address translation (NAT) module. In this manner, network address translation of mobile IP traffic is advantageously omitted. This allows the IP-in-IP tunnels used by mobile IP to pass through the gateway.

Claims

1. Apparatus for providing a gateway between a local area network and a wide area network, comprising:

a network address translation module;

a foreign agent module for advertising a care-of address on the local area network and processing registration and mobile internet protocol (IP) communication traffic on the local area network and the wide area network; and

a control module for identifying the registration and the mobile IP communication traffic to omit processing thereof by the network address translation module.