| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide information useful for finding a cause when communication abnormality occurs without the need of a large-capacity storage device even in the case of connecting a communication line as needed and performing a wide-area communication by utilizing radio communication. <P>SOLUTION: When performing communication between a first communication device and a second communication device, at least one of them identifies the presence or absence of abnormality occurence for each stage of a communication processing procedure comprising a plurality of processes, and respective identification results are recorded in a temporary storage memory as temporary data (S12). Every time a predetermined procedure is ended, it is identified whether or not the execution of the pertinent procedure is a success (S13). In the case that the execution of the pertinent procedure is a success, the temporary data is erased (S14). In the case that the execution of the pertinent procedure is a failure, the temporary data recorded in the temporary storage memory is written onto a prescribed nonvolatile memory and preserved as a communication abnormality log (S17). <P>COPYRIGHT: (C)2012,JPO&INPIT |
