COMMUNICATION SYSTEM, AND COMMUNICATION APPARATUS

Title:

COMMUNICATION SYSTEM, AND COMMUNICATION APPARATUS

Document Type and Number:

Japanese Patent JP2009135610

Kind Code:

A

Abstract:

To execute high-speed proximal wireless communication by using a high-frequency/wide-band signal between communication instruments located at a near distance to each other.

This communication system includes of a transponder and a reader/writer carrying out proximal wireless communication by an inductive coupling method, wherein determination of whether the transponder is brought close to the reader/writer becomes accurate because electric field intensity is drastically changed with respect to distance, and can start communication according to the intention of a user carrying out an operation bringing the transponder close to the reader/writer. The communication system is equipped with a high-speed high-capacity wireless communication means, and achieves high-speed communication and reduction of power consumption by controlling its power-on/off in response to the result of determination of whether the transponder is brought close to the reader/writer.

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Inventors:

WASHIRO MASANORI
MAEKAWA ITARU
KONYA SATOSHI

Application Number:

JP2007307974A

Publication Date:

June 18, 2009

Filing Date:

November 28, 2007

Export Citation:

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Assignee:

SONY CORP

International Classes:

H04W84/10; G06K17/00; G06K19/07; H04B5/02; H04W76/02

Domestic Patent References:

JP2003032261A	2003-01-31
JP2000049653A	2000-02-18
JP2005012973A	2005-01-13

Foreign References:

WO2007060494A1

2007-05-31

Attorney, Agent or Firm:

Masaaki Miyata
Eiji Yamada
Eiji Sasaki
Toshio Sawada

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