| CPC B60R 25/245 (2013.01) [G07C 9/00309 (2013.01); H04B 17/318 (2015.01); B60R 2325/101 (2013.01); B60R 2325/306 (2013.01); G07C 2009/00793 (2013.01); G07C 2009/00984 (2013.01); G07C 2209/63 (2013.01)] | 8 Claims |

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1. An on-vehicle communication system comprising:
an antenna that is provided on a vehicle and performs a close-range communication with a user terminal device present in a communication area around the vehicle; and
a control portion that is provided on the vehicle and executes a predetermined authentication process when a radio wave strength of a signal received from the user terminal device via the antenna or a signal received by the user terminal device from the antenna is equal to or more than a threshold value,
wherein the control portion notifies a user of information on a target communication position at which the user terminal device should be located when registering the threshold value by using a notification portion.
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