Dzung V Tran

US Patent:

7213263, May 1, 2007

Filed:

Nov 13, 2001

Appl. No.:

09/987168

Inventors:

Gowri Makineni - Alexandria VA, US
Ravi Nagarajan - Fairfax VA, US
Qiang Zhang - Falls Church VA, US
Hari Gadi - Fairfax VA, US
Dzung Tran - Ashburn VA, US

Assignee:

Smith Micro Software, Inc. - Herndon VA

International Classification:

G06F 17/00

US Classification:

726 11, 726 13, 726 15, 726 12

Abstract:

A system and method are provided for use in maintaining secure communications between a home network and a mobile client when the client roams outside of the home network to a new location. One method of the present invention includes the steps of: establishing a new IP address for the new client location; sending a registration message identifying the new IP address location; authenticating the registration message; encapsulating and transmitting the registration message to the home server; registering the new IP address as a care-of-address for the client at the home server; confirming the registration of the new IP address with the client; establishing a security association between the home server and the relay server on behalf of the client; performing network address translation between the client's permanent IP address client and the client's new IP address; tunneling packets addressed for the client between the home server based and the relay server based on the established security association and the address translation for the client; and decapsulating the packets at the relay server and forwarding the packets to the client.

US Patent:

20140099945, Apr 10, 2014

Filed:

Oct 5, 2012

Appl. No.:

13/646569

Inventors:

Bik Singh - Carlsbad CA, US
Karl Medina - Oceanside CA, US
Brian Deeley - Irvine CA, US
Dzung Tran - Purcellville VA, US

International Classification:

H04W 24/00

US Classification:

4554321

Abstract:

Presented is a system and method for providing policy-based roaming updates for a mobile device. The method includes receiving one or more roaming policies from a server, monitoring several parameters of the mobile device for a change in one or more of the several parameters, and evaluating the one or more of the several parameters and the change according to the one or more roaming policies. The method further includes updating a roaming priority list on the mobile device in response to the evaluating, and roaming, after the updating, according to the roaming priority list for establishing a wireless communication. The roaming priority list may include a home network and one or more roaming networks.