Communication method of IC card reader/writer
AssigneeSankyo Seiki Mfg. Co., Ltd.
InventorKazuto Saeki
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Abstract
A communication method of an IC card reader/writer which transmits a telegraphic message from a host device to an IC card or from said IC card to said host device is disclosed. The host device divides the data into blocks, each of which is of a size smaller than the capacity of a memory device equipped in said IC card reader/writer to transmit said data to IC card reader/writer, and attaches a code to each of said data blocks to indicate whether or not the block is the final data block.
Claims5
A communication method of an IC card reader/writer which transmits a telegraphic data message from a host device to an IC card or from said IC card to said host device comprising the steps of:
- dividing in said host device said telegraphic data message into data blocks each of which is of a size smaller than the capacity of a memory device equipped in said IC card reader/writer;
- transmitting said data blocks to said IC card reader/writer;
- and
- attaching a code to each of said data blocks to indicate whether or not the block is a final data block.
A communication method of an IC card reader/writer, which transmits a telegraphic message from a host device to an IC card or from said IC card to said host device comprising the steps of:
- storing in said IC card reader/writer said data blocks from said IC card up to a capacity that does not exceed the size of a memory device equipped in said IC card reader/writer;
- sending said stored data blocks to said host device collectively to form collective data and providing a code with said collective data wherein said code indicates whether or not said collective data is the final collective data to be sent.
A method for data transfer between a host device, an IC card reader/writer with a memory device and an IC card comprising the steps of:
- programming the host device to send host data to the IC card reader/writer, the host data being of a predetermined length which does not exceed a memory capacity of the memory device;
- sending a first host data block from the host device to the IC card reader/writer with the memory device;
- assigning a number, 1-n, to each host data block sent;
- attaching a data flag to each host data block to indicate if the host data block is a final data block sent;
- converting the host data blocks in the IC card reader/writer using a data protocol;
- sending a write message according to the data protocol from the IC card reader/writer to the IC card;
- and
- prompting the host device to send a next number (1-n) host data block to the IC card reader/writer until the final data block is sent.
Dependencies are inferred from the claim text.