FIRE ALARM SYSTEM - MATSUSHITA ELECTRIC WORKS LTD

Title:

FIRE ALARM SYSTEM

Document Type and Number:

WIPO Patent Application WO/2006/131998

Kind Code:

A1

Abstract:

A fire alarm system comprises a single receiver (1) and a plurality of fire sensors. The receiver (1) and fire sensors are in wireless communication with each other, using a super-frame (SF) consisting of a plurality of frames (F1-F30) each consisting of a single downstream time slot (B), which is used for the downstream from the receiver to the fire sensors, and a plurality of upstream time slots (D1-D99) used for the upstream from the fire sensors to the receiver. Each of the fire sensors transmits a radio signal by use of a respective one of the different upstream time slots assigned to that fire sensor.

Inventors:

NAGATA MASAHIRO (JP)
KASAI HIDEKI (JP)
FUJII TAKASHI (JP)
HIRATA SATOSHI (JP)
MOZUMI GON (JP)

Application Number:

PCT/JP2005/016505

Publication Date:

December 14, 2006

Filing Date:

September 08, 2005

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC WORKS LTD (JP)
NAGATA MASAHIRO (JP)
KASAI HIDEKI (JP)
FUJII TAKASHI (JP)
HIRATA SATOSHI (JP)
MOZUMI GON (JP)

International Classes:

G08B17/06; G08B25/10

Foreign References:

JPH11259771A	1999-09-24
JP2005085131A	2005-03-31
JPH09261374A	1997-10-03
JPH11234299A	1999-08-27
JP2002544635A	2002-12-24
US6624750B1	2003-09-23
JP2005085131A	2005-03-31

Other References: