US 9,809,197 B2
Vehicle communication device
Akira Miyazawa, Miyagi-ken (JP); and Katsuhiro Seino, Miyagi-ken (JP)
Assigned to Alps Electric Co., Ltd., Tokyo (JP)
Filed by Alps Electric Co., Ltd., Tokyo (JP)
Filed on Jun. 24, 2016, as Appl. No. 15/192,707.
Application 15/192,707 is a continuation of application No. PCT/JP2015/050459, filed on Jan. 9, 2015.
Claims priority of application No. 2014-004310 (JP), filed on Jan. 14, 2014.
Prior Publication US 2016/0304056 A1, Oct. 20, 2016
Int. Cl. G05D 1/00 (2006.01); G05D 3/00 (2006.01); G06F 7/00 (2006.01); G06F 17/00 (2006.01); B60R 25/24 (2013.01); H04Q 9/00 (2006.01); G08C 17/02 (2006.01); G07C 9/00 (2006.01)
CPC B60R 25/245 (2013.01) [G07C 9/00309 (2013.01); G08C 17/02 (2013.01); H04Q 9/00 (2013.01); G07C 2009/00388 (2013.01); G07C 2009/00555 (2013.01); G07C 2209/63 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A vehicle communication device comprising:
an in-vehicle device mounted in a vehicle, the in-vehicle device including a vehicle-side controller and being configured to transmit a vehicle-side signal including a measurement signal; and
a moving device configured to be carried in and out of the vehicle, the in-vehicle device and the moving device being configured to communicate with each other, the moving device including:
a receiver configured to receive the vehicle-side signal transmitted from the in-vehicle device, and obtain a received measurement signal corresponding to the measurement signal sent from the in-vehicle device;
a moving-side controller configured to generate a response signal in response to the received vehicle-side signal; and
a transmitter configured to transmit the response signal to the in-vehicle device, the response signal including:
signal strength measurement information obtained from a reception strength of the received measurement signal; and
signal strength fluctuation information obtained from fluctuation in the reception strength of the received measurement signal,
wherein the moving-side controller divides the received measurement signal into a plurality of sections, determines an average value of the reception strength in each section, and generates the signal strength fluctuation information indicating a ratio between a maximum value and a minimum value of the average value of each section,
and wherein the vehicle-side controller compares the ratio indicated by the signal strength fluctuation information with a threshold and determines that communication between the in-vehicle device and the moving device is normal if the ratio is smaller than the threshold so as to perform a subsequent control operation on the vehicle, while determining that the communication between the in-vehicle device and the moving device is abnormal if the ratio is greater than the threshold so as not to perform the subsequent control operation on the vehicle.