User paging for mobile satellite communications
US5619209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1994 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Jan 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18545
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of initiating communication between a ground station and a mobile handset through a satellite beam includes the steps of transmitting a forward signal indicative of a fixed geographic area covered by each of a plurality of satellites on at least a periodic basis. The location of said mobile handset is registered by storing at least one variable geographic value associated with said forward control signal at said mobile handset. A reverse signal is transmitted from said mobile handset to said ground station which is indicative of a geographic area where said mobile handset was located during registration. At least one variable geographic value associated with said reverse signal is stored in a database accessible to said ground station. The mobile handset determines whether a currently transmitted forward signal matches said variable geographic value stored. If a match is not found, the current location of said mobile handset is re-registered. The ground station determines which of said satellite beams should initiate a call signal to said mobile handset based upon said variable geographic value stored in said database for said mobile handset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.