Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With time interval measuring means
Reexamination Certificate
2009-01-20
2011-10-11
Lobo, Ian (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With time interval measuring means
C367S124000, C342S125000
Reexamination Certificate
active
08036064
ABSTRACT:
In a building environment, a distance associated with a building automation device is determined as a function of an interval or an inserted time delay between a wireless transmission of a signal and wireless reception of another signal. For example, a two-way communication is provided with an automatic interval or a desired time delay inserted before responding to a received transmission. By using two-way transmissions, the building automation devices may be free of clock synchronization. Acoustic signals may be used in a building environment to determine a distance. The building automation device may also use radio frequency information for communicating with other devices.
REFERENCES:
patent: 5933079 (1999-08-01), Frink
patent: 6922166 (2005-07-01), Richards et al.
patent: 2003/0142587 (2003-07-01), Zeitzew
Lobo Ian
Siemens Industry Inc.
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