INFORMATION COMMUNICATION SYSTEM, NONCONTACT IC CARD, AND IC CHIP

摘要

An information communication system which includes a master station and a plurality of slave stations and enables reduction of the processing time of the whole system. When the slave stations transmit response signals to the master station respectively, not only time slot numbers but also time delay numbers are generated. If a slave station detects that a second slave station transmits the response signal at a timing corresponding to the preceding time delay number in the same time slot, the former slave station is controlled not to transmit the response signal.