| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently execute analysis processing of a SIP signal. <P>SOLUTION: A first extraction section determines whether a character string identical to a header name included in a reception signal received from another communication device is stored in a first storage section or not and, if it is stored therein, extracts a header value corresponding to the header name from the reception signal. A second extraction section determines whether a character string identical to the header name included in the reception signal is stored in a third storage section or not if the first extraction section determines that it is not stored in the first storage section, and extracts the header value corresponding to the header name from the reception signal if determining that it is stored in the third storage section. If the second extraction section determines that it is not stored in the third storage section, a third extraction section converts a character string of the header name included in the reception signal to uppercase or lowercase characters and determines whether a character string identical to the converted character string of the header name is stored in the second storage section or not and, if it is stored in the second storage section, extracts the header value corresponding to the header name from the reception signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
