Patent ID: 8321743
Filing Date: 2012-11-27
Classification: H04L

Abstract:
1. An information storage medium comprising: a card main body embedded with a module, in which the module comprises: communication control means for interpreting received data, and selectively executing normal processing for returning response data to a transmission source of the received data based on a determination result indicating that the received data is correct data, and error processing for returning an error to the transmission source of the received data based on a determination result indicating that the received data is error data, wherein the communication control means determines that the received data is the correct data which complies with the predetermined communication protocol when the received data format of the received data coincides with a predetermined data format of the predetermined communication protocol, the communication control means determines that the received data is the error data which does not comply with the predetermined communication protocol when the received data format of the received data is different from the predetermined data format of the predetermined communication protocol, the communication control means determines, as the error data, the received data which suffers a partial loss, the communication control means returns the error during a period from a leading end of a last part of transmission data to be transmitted to the transmission source of the received data to a leading end of a frontmost part of next transmission data to be transmitted from the transmission source, wherein the communication control means: transmits the transmission data using a subcarrier of a first frequency corresponding to 1/n (n: being a natural number) of a carrier of a second frequency, stops transmission of the subcarrier within a predetermined period starting from the trailing end of a rearmost part of the transmission data, and returns the error within a period after an elapse of the predetermined period until the leading end of the frontmost part of the next transmission data.