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:
Nov. 24, 2015
Filed:
Mar. 27, 2006
Aziz Mohammed, Plano, TX (US);
Aziz Mohammed, Plano, TX (US);
Alcatel Lucent, Boulogne-Billancourt, FR;
Abstract
A method is described herein for enabling a person (presentity) to maintain their presence/IM service when they take their end-device and move/roam from a home network to a visited network. In one embodiment, while the person is located in the home network, their end-device (e.g., laptop, PDA, SIP/soft phone) uploads presence/IM information (e.g., presence rules, watcher list, service profile) from SIP/SIMPLE devices (e.g., presence server, SIP registrar, IM server). Then, after the person has taken their end-device and moved to the visited network, the end-device partially re-registers with the SIP registrar located within the home network. The end-device also partially registers with the SIP registrar located within the visited network. Once these steps are completed, then a person (presence watcher) can obtain presence information about the person (presentity) who is currently located within the visited network. In addition, a person (presence watcher) can send an IM message to the person (presentity) who is currently located within the visited network.