Satellite-based ring alert apparatus and method of use
US5930679A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1994 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Oct 3, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18558
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A satellite communication system provides users with global cellular coverage. To facilitate delivery of calls to users having subscriber units, a fixed channel is defined wherein subscriber units are notified of incoming calls. Subscriber units monitor this ring alert channel and examine subscriber unit IDs transmitted in a ring alert message contained therein. When a subscriber unit determines from the subscriber unit ID that a call is being directed to it, it calls into a network to receive a call. Subscriber units also monitor this fixed channel to receive a control channel directory identifying the location of a subscriber unit's broadcast (control) channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.