Providing telephone number data for international cellular roamer service
US6587688B1 · kind B1 · utility
149Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | May 2, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Apparatus and a method for providing international numbers in order to implement international cellular roamer service. When a roamer registers, the Visitor Location Register (VLR) serving the roamer, queries the Home Location Register (HLR) record of the roamer. The HLR tests whether the VLR is in a foreign country. If so, the HLR provides numerical information, such as the roamer's billing number, in international form, including the country code of the HLR. Advantageously, the VLR is provided with international numbers where appropriate, and the roamer can be accommodated outside the roamer's home country.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.