System judging whether radio communication is formal
A kind of wireless communication and formal technology, applied in the field of judging whether the wireless communication is legal or not, can solve the problems of the engine being started, the car door being unlocked by the thief at will, and the effect of preventing illegal establishment
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no. 1 Embodiment approach
[0022] Below, refer to Figure 1 to Figure 5 , a first embodiment of a communication fraud prevention system embodying the present invention will be described.
[0023] Such as figure 1 As shown, the vehicle 1 is equipped with a keyless operating system 3 . The vehicle 1 performs ID verification by wirelessly transmitting a request signal Srq (inquiry) to the electronic key 2 and receiving an ID signal Sid (response) in response to the inquiry from the electronic key 2 . Keyless Operating System 3 has an entry function and an engine start function. The entry function refers to: if the ID verification outside the car is established, the locking or unlocking of the car door is allowed or implemented. The engine start function refers to: if the ID verification in the vehicle is established, it is allowed to perform power conversion and engine start operations on the vehicle 1 through the engine switch 4 in the vehicle. In addition, the electronic key 2 corresponds to a commun...
no. 2 Embodiment approach
[0054] Next, refer to Figure 6 ~ Figure 8 , and the second embodiment will be described. In addition, the second embodiment differs from the first embodiment in that the electronic key 2 is used to determine whether the smart communication is authorized or not. Therefore, the same reference numerals are assigned to the same elements as in the first embodiment to omit detailed description, and only different parts will be described in detail.
[0055] Such as Figure 6 As shown, the verification ECU 9 includes a transmission strength notification unit 35 . The transmission intensity notification unit 35 notifies the electronic key 2 of the transmission intensity of the LF radio wave 24 transmitted from the vehicle 1 . That is, when the vehicle 1 transmits the LF radio wave 24 to the electronic key 2, the transmission intensity notification unit 35 not only includes the main data 36 of the LF radio wave 24 in the LF radio wave 24, but also includes data indicating the transm...
no. 3 Embodiment approach
[0071] Next, refer to Figure 9 ~ Figure 11 , and the third embodiment will be described. In addition, the third embodiment differs from the first and second embodiments in that the electronic key 2 designates the transmission intensity of the second LF radio wave 24b from the vehicle 1 . Hereinafter, the difference will be described in detail.
[0072] Such as Figure 9 As shown, the key control unit 13 includes a transmission intensity specifying unit 41 . The transmission intensity specifying unit 41 judges an appropriate transmission intensity of the second LF radio wave 24 b to be transmitted next by the vehicle 1 based on the RSSI of the first LF radio wave 24 a received by the electronic key 2 . The RSSI of the LF electric wave 24 changes based on the distance between the vehicle 1 and the electronic key 2 . Therefore, the distance between the vehicle 1 and the electronic key 2 can be indirectly estimated from the RSSI of the first LF radio wave 24a transmitted firs...
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