Portable electronic device and IC card processing device

• US 9,356,736 B2
• Filed: 03/10/2014
• Issued: 05/31/2016
• Est. Priority Date: 09/18/2013
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Uchida, Keisuke
• Primary Examiner(s): McMahon, Daniel
• Application Number:
  US14/202,039
• Publication Number:
  US 20150082111A1
• Time in Patent Office: 813 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1004 to protect a block of data words, e.g. CRC or checksum G06F11/1076 takes precedence; security arrangements for protecting computers or computer systems against unauthorized activity G06F21/00
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 7/10237 the reader and the record carrier being capable of selectively switching between reader and record carrier appearance, e.g. in near field communication [NFC] devices where the NFC device may function as an RFID reader or as an RFID tag
• CPC Class Codes: G07F 7/0806 Details of the card record carriers per se G06K
• CPC Class Codes: G07F 7/0893 the card reader reading the card in a contactless manner
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence

Abstract

An IC card includes a communication interface and a controller. The controller divides data to be transmitted to the external device into a plurality of divided portions of the data. Moreover, the controller transmits each of the divided portions of the data to which an error detection code is given, to the external device through the communication interface so as to make a predetermined non-transmission period after transmission of the each of the divided portions of the data. Moreover, the controller executes detecting an error notice showing a failure in receiving each of the divided portions of the data that is transmitted from the external device in the predetermined non-transmission period. Furthermore, when the error notice is detected, the controller retransmits the divided portion of the data which the controller has transmitted just before the controller detects the error notice.

Claims

1. A portable electronic device which executes a command from an external device, the portable electronic device comprising:

a communication interface which transmits data and receives data with the external device; and

a controller;

wherein when the communication interface transmits data collectively to the external device and receives a divided-message retransmission request which requests to divide the data and to retransmit divided portions of the data from the external device,

the controller

divides the data into a plurality of divided portions of the data,

gives an error detection code to each of the divided portions of the data,

transmits each of the divided portions of the data to which the error detection code is given, to the external device by the communication interface so as to make a predetermined non-transmission period after transmission of each of the divided portions of the data, wherein the controller executes detecting an error notice showing a failure in receiving each of the divided portions of the data from the external device in the predetermined non-transmission period, and

when the controller detects the error notice, the controller retransmits the divided portion of the data which the controller has transmitted just before the controller detects the error notice.

2. The portable electronic device according to the claim 1, wherein the controller detects that a carrier wave transmitted from the external device is modulated as the error notice.

3. An integrated circuit (IC) card processing device which transmits a command to an integrated circuit (IC) card, the IC card processing device comprising:

a communications interface which transmits data and receives data with the IC card in a noncontact manner; and

a controller;

wherein, when the communication interface receives data collectively transmitted from the IC card and fails in receiving the data collectively transmitted from the IC card,

the controller

transmits a divided-message retransmission request which requests to divide the data and to retransmit divided portions of the data, to the IC card,

receives each of the divided portions of the data to which an error detection code is given from the IC card through the communication interface;

judges whether the divided portion of the data is received without an error based on the error detection code given to the divided portion of the data received, and

transmits an error notice showing a failure in receiving the divided portion of the data to the IC card through the communication interface when judging that the controller has failed in receiving the divided portion of the data, and receives the divided portion of the data which the controller has failed in receiving and which the IC card retransmits.

4. The IC card processing device according to the claim 3, wherein the controller modulates a carrier wave to transmit to the IC card as the error notice.

5. A portable electronic device which executes a command from an external device, the portable electronic device comprising:

a communication interface which transmits data and receives data with the external device in a noncontact manner, and

a controller;

wherein, when the controller receives data collectively transmitted form the external device and fails in receiving the data collectively transmitted from the external device,

the controller

transmits a divided-message retransmission request which requests to divide the data and to retransmit divided portions of the data to the external device,

receives each of the divided portions of the data to which an error detection code is given, from the external device through the communication interface,

judges whether each of the divided portions of the data was received without an error based on the error detection code given to each of the divided portions of the data received, and

transmits an error notice showing a failure in receiving the divided portion of the data to the external device when judging that the controller has failed in receiving the divided portion of the data, and receives the divided portion of the data which the external device retransmits.

6. The portable electronic device according to claim 5, wherein the controller modulates a carrier wave which is transmitted to the external device as the error notice.

7. The portable electronic device according to claim 5, wherein the controller transmits a second carrier wave to the external device as the error notice.