Push-to-talk wireless communication for prepaid mobile subscribers
US7729685B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2007 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Jan 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/90
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Prepaid PTT service calls through a switched mobile communication network may originate at off-net roaming locations. A flag is set in a mobile telephone station indicating that the mobile station is that of a prepaid subscriber, to set a PTT client program to its “prepaid mode.” When the prepaid mobile station initiates a PTT call while roaming off-net, the call is directed to a prepaid server, and the PTT client program assists the subscriber to re-enter the called number when the prepaid server prompts the subscriber to do so. The call can then be extended from the prepaid server platform to a PTT switch for establishing communication with one or more selected contacts in a contact list, based on translation of the contact number to one or more destination telephone numbers for the called contact(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.