| 摘要 |
This invention relates to radio engineering, and in particular it concerns a method of establishing contact between users. The method consists in that, in a portable computerized device combined with a radio transceiver, data comprising an array of formed information, which is, upon conversion, assigned a personal code, is inputted into the memory. Then, this code is transmitted in the form of pulsed radio signals through the propagation medium for reception thereof by other devices operating within the range of the first device. Upon reception of pulsed code radio signals transmitted by other devices, the codes received are compared with the personal code, and when one of the codes received is found to coincide with the personal code, the received data corresponding to that code is decoded and outputted for visual or audio perception of the information array corresponding to that code. On coincidence, a pulsed coincidence radio signal is transmitted in the coincidence code and a response pulsed radio signal in the personal code is received for the users to identify one another. Following reception of the pulsed personal code radio signals confirming establishment of direct contact, the users' devices are switched to a direct communication mode for the users to communicate with each other. In the absence of coincidence between the codes received and the personal code, these codes are inputted into the memory and transmitted into the propagation medium, transmission being effected during the absence of a pulsed radio signal carrying the code corresponding to the personal code.
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