Title:
WIRELESS DEVICE MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/026745
Kind Code:
A1
Abstract:
A wireless device monitoring system includes a cellular phone (1) and an authenticating
device (2). A controller (20) of the authenticating device (2) continuously
and repeatedly perform distance detection processing based on a reception level
of a received wireless signal, and authentication processing based on an authentication
data included in the received wireless signal, at first communication intervals
(T1) and second communication intervals (T2). When there exists no electronic
device of an authenticated opposite party or when the electronic device of the
authenticated opposite party is further than a prescribed threshold distance,
an alarm signal is outputted or a prescribed control processing is performed.
When a first communication time (11) for performing the distance detection processing
is shorter than a second communication time (T12), the intervals are set to satisfy
T1
Inventors:
YOSHIKAWA YOSHISHIGE
HORIIKE YOSHIO
HORIIKE YOSHIO
Application Number:
PCT/JP2006/317069
Publication Date:
March 08, 2007
Filing Date:
August 30, 2006
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YOSHIKAWA YOSHISHIGE
HORIIKE YOSHIO
YOSHIKAWA YOSHISHIGE
HORIIKE YOSHIO
International Classes:
G06F21/31; G06F21/33; G06F21/34; G06F21/44; H04B7/26; H04W4/02; H04W12/06; H04W12/02
Foreign References:
| JP2002057789A | 2002-02-22 | |||
| JPH05347617A | 1993-12-27 | |||
| JPH1041936A | 1998-02-13 |
Other References:
See also references of EP 1926335A4
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (IMP Building 3-7, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 01, JP)
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