Title:
通信システム、通信方法及び制御装置
Document Type and Number:
Japanese Patent JP6474671
Kind Code:
B2
Abstract:
If a portable device (3) receives a request signal from a control device (2) that requires a response from the portable device (3), a first response signal is transmitted from the portable device (3) during a common period (Tc) defined in all portable devices (3). Thus, in a case where there is no portable device (3) which enables wireless communication with the control device (2), a value of received signal strength indication of a wireless signal which is received from the portable device (3) by the control device (2) is very small and becomes smaller than the threshold value during a period (Ts) in the common period (Tc). In this case, the control device (2) suspends reception processing of causing a signal to be transmitted from the plurality of portable devices (3) subsequently to the first response signal.
Inventors:
Sansei Yoshio
Application Number:
JP2015082604A
Publication Date:
February 27, 2019
Filing Date:
April 14, 2015
Export Citation:
Assignee:
Alps Alpine Co., Ltd.
International Classes:
E05B49/00; B60R25/24; H04Q9/00; H04W4/48
Domestic Patent References:
| JP2008208596A | ||||
| JP2007174237A | ||||
| JP2010219628A | ||||
| JP200919399A | ||||
| JP2001248340A |
Foreign References:
| US20080204192 |
Attorney, Agent or Firm:
Masahiro Matsushita
野▲崎▼ 照夫
Katsuyuki Okubo
Iwao Hirayama
野▲崎▼ 照夫
Katsuyuki Okubo
Iwao Hirayama
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