Patent ID: 8860550
Filing Date: 2014-10-14
Classification: B60R,G07C

Abstract:
1. An in-vehicle device controller comprising: an in-vehicle unit mounted on a vehicle for controlling an in-vehicle device; and a portable device, wherein the in-vehicle unit includes a request signal transmitter for transmitting a request signal including random information to the portable device, wherein the portable device transmits a first response signal in response to the request signal in such a manner that the first response signal is transmitted at a plurality of frequencies, which are switched according to a switching pattern corresponding to a part of the random information in the request signal, wherein the in-vehicle unit further includes a frequency specifying device for specifying the switching pattern based on the part of the random information in the request signal, wherein the in-vehicle unit further includes a reception determination device for executing a reception determination process of the first response signal based on a specified switching pattern, wherein the in-vehicle unit identifies the portable device according to the reception determination process, wherein the in-vehicle unit controls the in-vehicle device according to an identification of the portable device, wherein the request signal transmitter transmits the request signal to the portable device in response to an operation of a first operation device, which instructs one of a door locking operation and a door unlocking operation of the vehicle, wherein the request signal transmitter transmits the request signal to the portable device in response to an operation of a second operation device, which instructs a starting operation of a driving power source, and wherein the number of frequencies of the first response signal switched according to the switching pattern in a case where the portable device transmits the first response signal in response to the request signal with regard to the operation of the first operation device is smaller than the operation of the second operation device.