System for trackingmultiple exchanges of command/response pairs and monitoriong implemention of small routines in multiple logic flows

Abstract

An existing active base logic flow between a master transceiver and a slave transceiver, is selected as reference logic flow wherein is generated a set of concurrent logic flows. The concurrent logic flows are built with successive elementary packets segmenting pairs of command / response. An exchange of pairs of command / response is initialised and continued by the master transceiver on the basis of specific commands. The slave transceiver triggers a segmentation by transmitting specific responses on the reference logic flow.

Description

technical field [0001] The present invention relates to a protocol for the logical flow of multiple exchanges of command / response pairs sent on a single physical exchange channel between a master transceiver and a slave transceiver, and to the application of such a protocol, in particular to the Implementation of a system for tracking, monitoring, or troubleshooting the execution of applets (applets: Java programs) on the card. Background technique [0002] Currently, a protocol for exchanging data or information between master and slave transceivers is of great interest because it has the potential to affect a reliable, complete, and stable data exchange that can be achieved between master and slave units with comparable computing and processing capabilities. Information exchange between slave units is limited by memory capacity only with much lower computing and processing power. [0003] This is especially the case for computer systems consisting of card reader (CAD)-mic...

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Problems solved by technology

[0012] Therefore, the various logical channels defined by the ISO 7816-4 standard are logically decoupled, but the exchange of APDUs on a single physical exchange channel is beneficial to the CAD reader and its various applications, as well as to the Various applets and services remain prohibited, and the problem of conflicts prone to arise due to simultaneous multiple occurrences of command / response pairs to distinguish each logical channel has not been specifically resolved, especially in section 5.5.1 of the ISO7816-4 standard, paragraph 4 What is described: Before issuing the next command / response pair, the issuance of the previous command / response pair must end, commands and responses must not be nested on several logical channels, between receiving a command and issuing the corresponding response, A single logical channel must be active

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