Title:
ELEVATOR WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/069969
Kind Code:
A1
Abstract:
Provided is an elevator wireless communication system with which different signals can be simultaneously transmitted to two cars in the same frequency band. To achieve this, the elevator wireless communication system comprises: a transmission power allocation unit which allocates transmission power to a first and second signal, which are respectively directed towards one of two cars, according to the positions of the two cars; a conversion unit which converts the first and second signals according to the allocated transmission power; a superimposing unit which superimposes the converted first and second signals; and a wireless transmission unit which wirelessly transmits the superimposed signal. Each of the cars is equipped with a car-directed signal acquisition unit which acquires the signal directed to the car from the signals received from a wireless reception unit, and a selection unit which selects either a first or a second method according to the relative positional relationship between the car and the other car. If the first method is selected, the car-directed signal acquisition unit acquires a signal which is obtained by restoring the received signal. If the second method is selected, the car-directed signal acquisition unit acquires a signal which is obtained by subtracting the signal obtained by restoring the received signal from the received signal, and then restoring the subtraction result.
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Inventors:
TAKAI MANATO (JP)
Application Number:
PCT/JP2016/080130
Publication Date:
April 19, 2018
Filing Date:
October 11, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
B66B3/00
Foreign References:
| JP2006321576A | 2006-11-30 | |||
| JP2001341951A | 2001-12-11 | |||
| JP2002234677A | 2002-08-23 | |||
| JP2005119760A | 2005-05-12 | |||
| JPH05213549A | 1993-08-24 | |||
| JP2004026433A | 2004-01-29 |
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (JP)
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