| 摘要 |
<p>"Methof of access control in a communication system." In a communication system having a plurality of mutually independent subscriber stations these stations seize a common duplex transmission channel for establishing a connection in accordance with a multiple-access method. To prevent simultaneous access and the resultant access destruction and also in the case of frequent access destruction of the blocking of the common duplex transmission channel, each transmission station, to initiate a transmission therefrom, seizes the duplex transmission channel by means of a signalling character. The signalling character is transmitted by the subscriber station during a time slot allocated for that purpose. To distinguish between reporting subscriber stations a pulse function from a system of orthogonal or substantially orthogonal pulse functions is used as an identification character. The subscriber stations occupy the duplex transmission channel in time slots authorized for access, uncoordinated in time, with, for example, a randomly selected orthogonal pulse function.</p> |
