Inter-domain user and service mobility in SIP/SIMPLE systems
US9197674B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2006 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Dec 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L51/043
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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 104, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.