System comprising a plurality of devices that can be...

Details System comprising a plurality of devices that can be... System comprising a plurality of devices that can be...

2004-09-13

2008-01-15

Anderson, Matthew (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

C370S328000, C370S338000, C340S010100, C340S010300, C340S010420

Reexamination Certificate

active

07319844

ABSTRACT:
Each device (1a,1b,1c) comprises a processing circuit connected to a first antenna (4), designed to be coupled to an external antenna (3, 5), and a second antenna (5) designed to be coupled to an antenna (4) of a higher-ranking device (1). The system comprises a reading unit and devices (1) having a predetermined ranking. The first antenna (4a) of the rank one device (1a) is coupled to an antenna (3) of the reading unit. Addressing by the reading unit of a device (1c) ranking higher than one is performed by means of the associated lower-ranking devices (1a,1b). A device (1a1) of predetermined ranking is associated with a sub-set (8a) of higher-ranking devices (1b11, 1b12) so as to form a hierarchical tree structure.

REFERENCES:
patent: 5621913 (1997-04-01), Tuttle et al.
patent: 6121544 (2000-09-01), Petsinger
patent: 2002/0119770 (2002-08-01), Twitchell, Jr.
patent: WO 01/94967 (2001-12-01), None

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