Communication system, communication method, and control device
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United States of America Patent
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Dec 5, 2017
Issued Date -
N/A
app pub date -
Apr 4, 2016
filing date -
Apr 14, 2015
priority date (Note) -
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Abstract
If a portable device receives a request signal from a control device that requires a response from the portable device, a first response signal is transmitted from the portable device during a common period defined in all portable devices. Thus, in a case where there is no portable device which enables wireless communication with the control device, a value of received signal strength indication of a wireless signal which is received from the portable device by the control device is very small and becomes smaller than the threshold value during a period in the common period. In this case, the control device suspends reception processing of causing a signal to be transmitted from the plurality of portable devices subsequently to the first response signal.
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