DATA TRANSMISSION METHOD IN PASSIVE COMMUNICATION SYSTEM CAPABLE OF RESOLVING SYNCHRONIZATION LOSSES OF THE FREQUENCY HAVING LOW SIGNAL-TO-NOISE RATIO AND INACCURATE AND UNSTABLE FEATURES IN A PASSIVE COMMUNICATION SYSTEM

摘要

PURPOSE: A data transmission method in a passive communication system is provided to variably set the number of synchronizing signals considering the current link frequency properties to optimize the transmission efficiency. CONSTITUTION: An active device transmits a request message with a number of synchronizing signals which are determined by the communication environment information. A passive device transmits a response message with a message fraction bundle consisting of a synchronizing signal and one or more message fractions to the active device(S134,S140). The active device determines the number of message fractions located in between the synchronizing signals or the length of the message fractions based on the communication environment information. The active device includes determined information in the request message.