System and method for establishing network connection

• US 8,027,339 B2
• Filed: 09/29/2008
• Issued: 09/27/2011
• Est. Priority Date: 03/12/1997
• Status: Expired due to Fees

• Current Assignee: Nomadix, Inc. (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Nomadix, Inc. (Nippon Telegraph and Telephone Corporation)
• Inventors: Kleinrock, Leonard, Short, Joel E.
• Primary Examiner(s): Ton; Dang
• Assistant Examiner(s): Kamara; Mohamed
• Application Number:
  US12/240,427
• Publication Number:
  US 20090024745A1
• Time in Patent Office: 1,093 Days
• Field of Search: 370/352, 370/389, 370/392, 370/395.54, 455/455
• US Class Current: 370/389
• CPC Class Codes: H04L 41/0813 characterised by the conditions triggering a change of settings
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 61/25 of the same type
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 61/5084 Providing for device mobility network addressing or numbering for mobility support in wireless networks H04W8/26; mobile IP H04W80/04
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/182 Network node acting on behalf of an other network entity, e.g. proxy

Abstract

A portable router for enabling a data communication terminal to be location and device transparent includes: a first module for storing a digital communication address of a user; a second module for detecting a data communication network location to which the terminal is connected; a third module for detecting communication devices that are connected to the terminal; a fourth module for establishing data communication between the terminal and the network such that the communication address of the location from the second module is automatically converted to the communication address of the user from the first module; and a fifth module for automatically selecting a communication device which was detected by the third module for use by the fourth module.

Claims

1. A non-transitory computer-readable medium comprising instructions configured to be executed on a foreign gateway device, the foreign gateway device being connected to a user host device by a network, wherein the instructions, when executed, cause the foreign gateway device to:

process an ARP request packet transmitted from the user host device and received at the foreign gateway device, wherein the ARP request packet includes at least a sender IP address, a sender hardware address, and a target IP address that corresponds to an IP address of a home gateway, wherein the IP address of the home gateway is different from any IP address associated with the foreign gateway device;

prepare an ARP response packet that includes at least a sender IP address that corresponds to the IP address of the home gateway, a sender hardware address that corresponds to a hardware address of the foreign gateway device, a target IP address that corresponds to the sender IP address of the ARP request packet, and a target hardware address corresponding to the sender hardware address of the ARP request packet;

transmit the ARP response packet from a network interface of the foreign gateway device; and

process at the foreign gateway device a network packet transmitted from the user host device and received at the foreign gateway device, wherein the network packet comprises at least a target IP address that differs from the IP address of the home gateway and the foreign gateway and a target hardware address that corresponds to the hardware address of the foreign gateway device.

2. The non-transitory computer-readable medium of claim 1, wherein the network interface comprises an Ethernet port.

3. The non-transitory computer-readable medium of claim 1, wherein the hardware addresses are MAC addresses.

4. The non-transitory computer-readable medium of claim 1, wherein the ARP request packet further comprises a target hardware address that corresponds to a broadcast address.

5. The non-transitory computer-readable medium of claim 1, wherein the method performed by the foreign gateway device further comprises:

modifying a sender address of the network packet to correspond to one of the one or more IP addresses of the foreign gateway, and transmitting the network packet.

6. The non-transitory computer-readable medium of claim 1, wherein the foreign gateway device has no information about the home gateway prior to the foreign gateway performing the step of receiving an ARP request packet transmitted from the user host device.

7. A foreign network device comprising:

a memory containing a broadcast handling function;

a processor executing the broadcast handling function; and

a network interface configured to receive an ARP request packet transmitted by a first device, wherein the ARP request packet includes at least a sender IP address, a sender hardware address, and a target IP address associated with a home gateway device, wherein the target IP address does not correspond to any IP address associated with the foreign network device;

wherein the broadcast handling function is configured to responsively prepare and cause the transmission of an ARP response packet that includes at least a sender IP address that corresponds to the target IP address of the ARP request packet, a sender hardware address that corresponds to a hardware address of the foreign network device, a target IP address that corresponds to the sender IP address of the ARP request packet, and a target hardware address that corresponds to the sender hardware address of the ARP request packet; and

wherein the network interface is further configured to receive a network packet transmitted by the first device, the network packet including a target IP address that corresponds to the target IP address of the ARP request packet and a target hardware address that corresponds to the hardware address of the foreign network device.

8. The foreign network device of claim 7, wherein the ARP request packet is transmitted at least in part over a wireless network.

9. The foreign network device of claim 7, wherein the hardware addresses are MAC addresses.

10. The foreign network device of claim 7, wherein the ARP request packet further comprises a target hardware address associated with a broadcast address.

11. The foreign network device of claim 7, wherein the network interface is further configured to modify a sender address of the network packet to correspond to one of the one or more IP addresses of the foreign gateway, and wherein the network interface is further configured to transmit the network packet.

12. The foreign network device of claim 7, wherein the foreign network device has no information about the home gateway device prior to the network interface receiving an ARP request packet transmitted by the first device.