Method of providing data, voice, and SMS services to LTE subscribers roaming in 2G/3G visited networks
US10932321B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2018 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Jan 13, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/182
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of providing voice call, data, and SMS services to a user equipment roaming in a 2G/3G visited network and subscribed to an LTE home network. An Interworking Function communicates with both the visited network and the home network. The Interworking Function translates between Mobile Application Part (MAP) protocol used by the 2G/3G visited network and Session Initiation Protocol (SIP) used by the LTE home network. The Interworking Function establishes both a MAP Registration with the 2G/3G visited network and also a SIP Registration with the LTE home network, thereby enabling provision of voice call, data, and SMS services to the roaming UE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.