EP 1058214 A1 20001206 - Method of bidirectional data transfer and system for carrying out the same
Title (en)
Method of bidirectional data transfer and system for carrying out the same
Title (de)
Verfahren zur bidirektionalen Datenübertragung und System zur Ausführung derselben
Title (fr)
Procédé de transmission bidirectionnelle de données, et système pour sa mise en oeuvre
Publication
Application
Priority
FR 9906863 A 19990601
Abstract (en)
The method operates as an access system of the 'hands free' type which permits access to a closed space, such as the interior of an automobile. Remote exchange of data with a recognition device installed in the closed space and an identifier designed to be carried by a user. Access is only authorized when the recognition device has authenticated the identifier. Data exchange at the same radio frequency is established, called RF exchange, e.g. at 315, 434 or 868 MHz, between the recognition device and the identifier. During the course of the data exchange, the transmission of a response signal by the identifier to the recognition device for a period (tau) of about 0.8 micro seconds, with respect to the reception by the identifier of an interrogation signal from the recognition device, so that neither the recognition device nor the identifier operate simultaneously whilst transmitting or receiving the RF exchange.
IPC 1-7
IPC 8 full level
E05B 49/00 (2006.01); B60R 25/01 (2013.01); B60R 25/10 (2013.01); B60R 25/24 (2013.01); E05B 65/20 (2006.01); G07C 9/00 (2006.01); H04B 1/59 (2006.01); H04Q 9/00 (2006.01); H04Q 9/14 (2006.01)
CPC (source: EP US)
G07C 9/00309 (2013.01 - EP US); G07C 9/28 (2020.01 - EP US); G07C 2009/00555 (2013.01 - EP US); G07C 2009/00793 (2013.01 - EP US); G07C 2209/63 (2013.01 - EP US)
Citation (search report)
- [A] EP 0685825 A2 19951206 - BRITISH TECH GROUP [GB]
- [A] EP 0556910 A1 19930825 - WATERS & GIJSBERS BEHEER BV [NL]
- [A] US 5723911 A 19980303 - GLEHR MANFRED [DE]
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
EP 1058214 A1 20001206; FR 2794603 A1 20001208; FR 2794603 B1 20010907; JP 2001057691 A 20010227; US 6657536 B1 20031202
DOCDB simple family (application)
EP 00401524 A 20000530; FR 9906863 A 19990601; JP 2000164613 A 20000601; US 58410100 A 20000531