Patent ID: 8549161

Claim:
A method for the data communication between a portable data carrier and an external communication device, wherein the data carrier and the communication device in each case comprise a TCP/IP protocol stack, comprising the steps: sending communication data from the communication device to the data carrier, the communication data comprising at least commands according to an Internet protocol of the application layer of the TCP/IP reference model and commands in the form of APDUs according to ISO/IEC 7816-4; transmitting the communication data from the communication device to the data carrier; receiving the communication data by the data carrier; and separating the received APDUs and the received Internet protocol commands from each other by means of an allocator unit of the data carrier; wherein the received APDUs and the received Internet protocol commands are both transmitted by means of TCP in a transport layer of the TCP/IP reference model from the communication device to the data carrier, and wherein the allocator unit of the data carrier carries out the separation of the received APDUs and the received Internet protocol commands only above said transport layer of the TCP/IP reference model.