Data storage medium and method for contactless communication between the data storage medium and a reader

摘要

A method and a data carrier for contactless communication of a reading device with at least two communication-ready applications located on a portable data carrier. A first communication-readiness signal is generated for a first application and sent to the reading device, the signal having a first identification number that is assigned to the first application and indicates to the reading device the communication readiness of said first application, and a second communication-readiness signal is generated and sent for a second application, the second signal having a second identification number different from the first identification number, which is assigned to said second application and indicates to the reading device the communication readiness of the second application. The identification numbers simulate for the reading device the communication readiness of a data carrier in each case. The reading device thus has the impression of communicating with applications of two separate data carriers.

主权项

1. A method for contactless communication of a reading device with at least two communication-ready applications located on a portable data carrier, comprising the steps:
generating a first communication-readiness signal to the reading device for a first of the at least two applications, the communication-readiness signal comprising a first identification number which is assigned to the first of the at least two applications and indicates to the reading device the communication readiness of said first application, and generating a second communication-readiness signal to the reading device for a second of the at least two applications, the second communication-readiness signal comprising a second identification number different from the first identification number, which is assigned to said second application and indicates to the reading device the communication readiness of said second application, wherein the first communication-readiness signal is generated for a first group of applications comprising a first plurality of applications including the first application, and the first identification number is assigned to every application in the first group, and the second communication-readiness signal is generated for a second group of applications comprising a second plurality of applications including the second application, and the second identification number is assigned to every application in the second group, the first communication-readiness signal indicating to the reading device the communication readiness of every application of the first group, and the second communication-readiness signal indicating to the reading device the communication readiness of every application of the second group.