Subscription system for GPS information
US7089113B1 · kind B1 · utility
13Cited by
17References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2006 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jan 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/009
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A GPS information service system for providing supplemental GPS location correction and signal acquisition information to subscribers. A GPS information server broadcasts GPS information encrypted with subscription keys. Remote GPS subscription unit receive the key enablers for the subscription keys in service activation (SAM) messages for the services for which they have subscribed and then use the subscription keys to decrypt the GPS information. In order to prevent unauthorized use, the SAM messages have signatures derived from identifications of the remote GPS subscription units using an unsymmetrical signature algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.