UNAUTHORIZED COMMUNICATION ESTABLISHMENT PREVENTION SYSTEM

• Main Authors: IMAI TOMOMI, IWASHITA AKITOSHI, KOGA KENICHI
• Format: Patent
• Language: English; Japanese
• Published: 09.04.2020
• Subjects: ACCESSORIES THEREFOR; CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; FIXED CONSTRUCTIONS; HANDCUFFS; KEYS; LOCKS; PERFORMING OPERATIONS; PHYSICS; SAFES; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WINDOW OR DOOR FITTINGS; WIRELESS COMMUNICATIONS NETWORKS

To provide an unauthorized communication establishment prevention system capable of precisely detecting unauthorized communication.SOLUTION: An unauthorized communication establishment prevention system transmits a reply radio wave Sb transmitted by an electronic key according to a predetermined transmission pattern when confirming the right or wrong of communication by checking delay time Tx of radio waves transmitted and received between a vehicle and the electronic key. Specifically, when a reply radio wave Sb is returned as a response to a transmission radio wave Sa from the electronic key, the system creates a pattern not to transmit the reply radio wave Sb. If a transmission pattern of a reply radio wave Sb obtained during a series of communication is the predetermined pattern, the system permits communication establishment, and on the other hand if the transmission pattern of the reply radio wave Sb is not the predetermined pattern, it does not permit communication.SELECTED DRAWING: Figure 3 【課題】不正通信を精度よく検出することができる通信不正成立防止システムを提供する。【解決手段】車両及び電子キーの間で送受信される電波の遅延時間Ｔｘを確認して通信の正否を確認するにあたり、電子キーから送信される返信電波Ｓｂを規定の送信パターンで送信する。具体的には、電子キーから送信電波Ｓａに対する応答として返信電波Ｓｂを返すとき、返信電波Ｓｂを送信しないパターンを作る。そして、一連の通信で取得した返信電波Ｓｂの送信パターンが規定パターンをとれば、通信成立を許可し、一方で返信電波Ｓｂの送信パターンが規定パターンをとらなければ、通信を不可とする。【選択図】図３