The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2011
Filed:
Oct. 16, 2007
Applicant:
Richard P. Ejzak, Wheaton, IL (US);
Inventor:
Richard P. Ejzak, Wheaton, IL (US);
Assignee:
Alcatel-Lucent USA Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system for providing circuit-switched to IP Multimedia Subsystem voice call continuity with a single radio are provided. The exemplary embodiment takes advantage of a standard RANAP signaling procedure called 'directed retry' to perform a much better coordination between the change in radio mode and the transfer of the media path. With the use of 'directed retry', the transfer of the media path does not begin until the handover procedure is complete, thus significantly reducing the likely amount of media disruption.