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:
Dec. 26, 2006
Filed:
Aug. 29, 2003
Niranjan N. Segal, Arlington, TX (US);
Anatoly S. Belkin, Glenview, IL (US);
Alex P. Hirsbrunner, Bloomingdale, IL (US);
Ajaykumar Idnani, Schaumburg, IL (US);
Jennifer Pierce, Algonquin, IL (US);
Niranjan N. Segal, Arlington, TX (US);
Anatoly S. Belkin, Glenview, IL (US);
Alex P. Hirsbrunner, Bloomingdale, IL (US);
Ajaykumar Idnani, Schaumburg, IL (US);
Jennifer Pierce, Algonquin, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A dual-band wireless subscriber unit (SU) () having an enterprise address of Eand a cellular address of C, corresponding method (), software program (), and WLAN () determines () that the SU is about to leave a wireless local area network (WLAN) (). In response, when the SU is involved in a call on E, the SU sends () to the WLAN a SIP message, for example a Refer message with a 'Refer To' field of Cif an ongoing call or a SIP Redirect message with a contact address of Cif a new call is attempting to begin on E. In response to receiving either message, the WLAN seamlessly transfers () the call to C