Information communication system, noncontactic IC card and IC chip

Abstract

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.

Description

technical field [0001] The present invention relates to an information communication system for communicating between a master station and a plurality of slave stations, a non-contact IC card and an IC chip used as slave stations of the information communication system. Background technique [0002] In recent years, information communication systems have been developed that use IC cards as slaves and reader / writers as masters to communicate information in a non-contact state, and their practical application is being considered in various fields such as station ticket gates and logistics. For example, when this information communication system is applied to the ticket gate of a station, the IC card is used as a monthly pass, etc., and the reader and reader at the automatic ticket gate are used to pass information to carry out door switch control, etc., so that the user does not need to use the card box It is very practical to take out commuter passes, etc., and it is expected...

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