System and method of handling emergency calls from roaming mobile stations in a radio telecommunications network
US6240284A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1998 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Nov 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method in a radio telecommunications network for reconnecting an emergency call between a roaming mobile station with an emergency (emergency MS) and a public safety answering point (PSAP) when the call has been disconnected before the call was finished. The network includes a serving mobile switching center (MSC) serving the emergency MS, a border MSC bordering the serving MSC, and a home location register (HLR) that stores features and subscription data for the emergency MS. When the emergency call begins, a hotlining feature for the emergency MS is activated in the HLR which automatically reconnects the emergency MS to the PSAP when the MS accesses the network through a registration or by originating a subsequent call. Inter-exchange messages ensure that the emergency MS is automatically connected to the PSAP, even if the emergency MS accesses the network in the border MSC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.