Accessing IP multimedia subsystem
US7304966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Jul 13, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/51
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and a system for providing access to an IP multimedia subsystem (IMS) for a subscriber roaming in a visited communication network are described. A subscriber equipment determines that a visited network IMS is not accessible and sends a register message for registering to an IMS to a control entity in the home communication network of the subscriber. The control entity recognizes that the register message is received directly from a subscriber equipment, and an access entity for accessing the IMS of the home network is assigned. Then, the control entity sends a message to the subscriber equipment which message comprises the address of the access entity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.