Method of managing collisions in a non-contact data...

Details Method of managing collisions in a non-contact data... Method of managing collisions in a non-contact data...

1999-12-06

2004-02-10

Lieu, Julie (Department: 2632)

Communications: electrical

Selective

Interrogation response

C340S572400, C340S010320, C340S010200, C340S572200

Reexamination Certificate

active

06690263

ABSTRACT:

FIELD
The invention relates to contactless communication between a portable object and a terminal.
BACKGROUND
Contactless data interchange is well known; applications of this technique include, in non-limiting manner, controlling access and remote payment, e.g. for access to and payment for public transport.
In this example, each user is provided with a portable object of the “contactless card” or “contactless badge” type, which object is capable of interchanging information with a fixed terminal or station by moving the portable object close thereto so as to enable mutual non-mechanical coupling to take place therebetween (the term “terminal” is used herein to designate a data transceiver terminal suitable for co-operating with portable objects).
The invention relates to the particular situation in which a plurality of portable objects can be present simultaneously in the field of action of the terminal, and where there are no physical means, e.g. insertion into a slot, for isolating the arrival of a single object only in said field.


REFERENCES:
patent: 4647931 (1987-03-01), Mawhinney
patent: 5625628 (1997-04-01), Heath
patent: 5729542 (1998-03-01), Dupont
patent: 6459704 (2002-10-01), Jandrell
patent: 0 553 905 (1993-08-01), None
patent: 0553905 (1993-08-01), None
patent: 0 702 324 (1996-03-01), None
U.S. patent application Ser. No. 09/381,002, field Feb. 14, 2000.

Affiliated with

Also associated with

Rating

Method of managing collisions in a non-contact data... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of managing collisions in a non-contact data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of managing collisions in a non-contact data... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3345527