Method and device for controlling entry into a secured location, especially into a motor vehicle

US6954007B1 · kind B1 · utility

Assignees

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE
• Robert Bosch GmbH · DE

Inventors

• Michael R. Meier · Gaylord, US
• Stephan Schmitz · Stuttgart, DE
• Andreas Titze · Braunschweig, DE
• Dominique Nemetschek · Oebisfelde, DE

Key dates

• Filing date: Sep 22, 2000
• Grant date: Oct 11, 2005
• Expiry date: Oct 12, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2009/00793
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method is for controlling entry, e.g., into a motor vehicle, during which a key and a base station wirelessly exchange authentication data between one another in an active or a passive communication mode. At the beginning of the authentication process, the base station transmits a call signal to the key, and the key replies to the call signal with a reply signal. The base station verifies the received reply signal of the key in the communications mode in which the reply signal was received. If the reply signal of the key was received in the active communications mode, the base station transmits a first selection instruction to the key thus causing the key to perform the subsequent communication in the active communications mode. If the reply signal of the key was received in the passive communications mode, the base station transmits a second selection instruction to the key thus causing the electronic key to perform the subsequent communication in the passive communications mode.