Time division communication privacy calling method for mobile object communication
专利汇可以提供Time division communication privacy calling method for mobile object communication专利检索，专利查询，专利分析的服务。并且PURPOSE: To secure the privacy of communication by ciphering the time length of each frame imparted to a transmission signal at a radio base station or a mobile radio equipment, changing the time length of each time slot and selecting whether the sequence of the signal in a time region is normal or reverse.
CONSTITUTION: Switches SW (78-0)-(78-4) of a cryptographic time segment signal generating circuit group 78-1 of a radio base station are thrown to the position (a) or (b) by the output signal of a cryptography imparting device 76 including its time length. When the SW78-0 is set to the position (a) and the SW78-1 is set to the position (a), the signal is once stored at a storage circuit M1 and a reverse time read circuit RT1 reads the signal while its sequence is reversed. Moreover, when the SW78-1 is set to the position (b), the signal is delayed for a prescribed time at a delay circuit Γ1 and inputted to a signal speed converter 51-1-1 from the position (b) of the SW78-3. Thus, interception by a radio equipment not belonging to the system and not knowing timewise transmission sequence of the signal accommodated in the slot is prevented.
COPYRIGHT: (C)1992,JPO&Japio，下面是Time division communication privacy calling method for mobile object communication专利的具体信息内容。
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