Remote subscription unit for GPS information

Details Remote subscription unit for GPS information Remote subscription unit for GPS information

2007-01-02

2007-01-02

Nguyen, Tan Q. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

Reexamination Certificate

active

11437467

ABSTRACT:
A GPS information service system for providing supplemental GPS correction and signal acquisition information to subscribers. A GPS information server broadcasts GPS aiding information encrypted with subscription keys. A remote GPS subscription unit receives the key enablers for the subscription keys in service activation (SAM) messages for the services for which they have subscribed and then uses the subscription keys to decrypt the GPS aiding information. In order to prevent unauthorized access to the information, unsymmetrical signature generation and authentication algorithms are used for generating and authenticating signatures for the SAM messages.

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Ulrich Vollath, Alois Buecherl, Herbert Landau, Christian Pagels & Bernhard Wagner, “Multi-Base RTK Positioning Using Virtual Reference Stations”, Spectra Precision Terrasat GmbH.

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