Bich Diep Nguyen

US Patent:

7283823, Oct 16, 2007

Filed:

Sep 10, 2004

Appl. No.:

10/939050

Inventors:

Christopher E. Pearce - Dallas TX, US
Ramanathan T. Jagadeesan - San Jose CA, US
Bich T. Nguyen - Los Altos CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04Q 7/20

US Classification:

455439, 4554141, 455417

Abstract:

A mobile station includes a first wireless interface that can couple to a first wireless network, a second wireless interface that can couple to a second wireless network, and a controller. The controller can negotiate a first wireless link with the first wireless network using the first wireless interface and establish a communication session with a remote device using the first wireless link. The controller can also detect a session handoff trigger, negotiate a second wireless link with the second wireless network using the second wireless interface in response to the session handoff trigger, and invoke a private branch exchange feature to transfer the communication session from the first wireless link to the second wireless link.

US Patent:

8116769, Feb 14, 2012

Filed:

Feb 3, 2006

Appl. No.:

11/347770

Inventors:

Steven R. Donovan - Plano TX, US
Bich T. Nguyen - Los Altos CA, US
Mark Grayson - Maidenhead, GB
Christopher E. Pearce - Dallas TX, US
Ramanathan T. Jagadeesan - San Jose CA, US
Andrew C. Chung - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04W 36/00

US Classification:

455436, 455437, 455438, 455439, 455453, 370328, 370331, 370338

Abstract:

Anchoring a communication session for a target mobile phone includes identifying a current access node operable to provide the target mobile phone access to a first network of a first network type. Potential access nodes operable to provide a mobile phone access to a second network of a second network type are identified. Whether the communication session can be handed off to a potential access node of the one or more potential access nodes is established. Anchoring of the communication session is initiated in the second network only if the communication session can be handed off to a potential access node of the one or more potential access nodes.