Method and device for selecting a reconfigurable...

G - Physics – 06 – K

Patent

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G06K 7/00 (2006.01)

Patent

CA 2324473

There is provided a method and device for selecting a communications protocol between an integrated circuit card and a terminal. The terminal supports at least two communications protocols, with one of the at least two communications protocols being a preferred communications protocol. The terminal transmits a reset to the integrated circuit card and receives an answer-to-reset from the integrated circuit card indicative of a first communications protocol. The terminal determines whether the first communications protocol matches the preferred communications protocol. If the first communications protocol does not match the preferred communications protocol, the terminal transmits another reset to the integrated circuit card and receives another answer-to-reset from the integrated circuit card indicatives of a second communications protocol. According to another aspect of the invention, the integrated circuit card has a processing unit and a memory coupled to the processing unit, the memory having stored therein a plurality of answers-to-reset, where each of the plurality of answers-to-reset is indicative of a communications protocol. The integrated circuit card transmits one of the plurality of answers-to-reset responsive to a reset and transmits another one of the plurality of answers-to-reset responsive to a subsequent reset.

L'invention porte sur un procédé et un dispositif de sélection d'un protocole de communication entre une carte de CI et un terminal. Ledit terminal, qui comporte au moins deux protocoles de communication dont l'un est préféré, transmet une réinitialisation à la carte dont il reçoit une réponse indiquant un premier protocole de communication, puis détermine si ce premier protocole de communication correspond ou non au protocole de communication préféré. Si ce n'est pas le cas, ledit terminal, transmet une nouvelle réinitialisation à la carte dont il reçoit une nouvelle réponse indiquant un deuxième protocole de communication. Dans une variante, la carte de CI comporte une unité de traitement et une mémoire lui étant couplée où sont stockées plusieurs réponses à des réinitialisations indiquant chacune un protocole de communication. La carte de CI émet alors l'une des différentes réponses suite à une réinitialisation, puis une autre suite à la réinitialisation suivante.

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