Contactless communication system between portable data carriers and terminal, sends command to other data carrier before command is completely executed by first data carrier

摘要

The system has portable data carriers (2,3) which are individually addressable and execute commands transmitted from a terminal (1). The communication between the terminal and the data carriers comprises parallel communication, whereby before a command transmitted by the terminal has been completely executed by one data carrier, a further command is sent to another data carrier. An independent claim is included for a method of performing contactless communication between a terminal and multiple portable data carriers.