Method and system for providing a deployable emergency call service for wireless handsets
US8068808B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2009 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | Jun 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments of systems and methods are presented to provide local citizenry with the ability to initiate emergency calls on their mobile device through a deployable cellular communication resource, such as a switch on wheels. The mobile device may be provisioned with a primary preferred roaming list (PRL) and a secondary PRL. The secondary PRL is accessed only when a switch-to-secondary-PRL flag is set in the primary PRL. Upon detection of the switch-to-secondary-PRL flag, the mobile device may enter an emergency call mode which only allows the mobile device to initiate an emergency call. If no network listed in the primary PRL and no emergency network listed in the secondary PRL is available, the mobile device may pause for a predetermined time before repeating attempts to access a network in order to conserver battery power until cellular communication networks are repaired or temporary networks implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.