Title:
通信システム
Document Type and Number:
Japanese Patent JP3553926
Kind Code:
B1
Abstract:
A communication system comprises at least one first wireless tag for identifying a first apparatus location area, at least one second wireless tag for identifying a second apparatus location area, a transmitter, and a receiver. The transmitter, when residing in the first or second apparatus location area, outputs a wireless ID read signal to read the ID of the wireless tag in the area, multiplexes the read ID on a communication signal, and transmits the resultant communication signal. The receiver, when residing in the second or first apparatus location area, outputs a wireless ID read signal to read the ID of the wireless tag in the area, determines whether or not an ID identical to the read ID is multiplexed on a received communication signal, and determines that the communication signal is addressed to the receiver itself when the ID is multiplexed.
Inventors:
Makoto Kimura
Application Number:
JP2003271026A
Publication Date:
August 11, 2004
Filing Date:
July 04, 2003
Export Citation:
Assignee:
Mediagram Co., Ltd.
International Classes:
G08C17/02; G08C19/00; G08C23/04; H04B1/06; H04L12/28; H04N5/00; H04Q9/00; H04W4/04; H04W84/10; H04W84/12; H04W92/08; (IPC1-7): H04L12/28; H04B1/06; H04N5/00; H04Q9/00
Domestic Patent References:
| JP2003047078A | ||||
| JP2002374582A | ||||
| JP2003037604A | ||||
| JP11252121A |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Otsuka Sumie
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Otsuka Sumie