POWER MANAGEMENT CONTROL METHOD IN DHCP ENVIRONMENT, AND INFORMATION PROCESSOR

摘要

PPROBLEM TO BE SOLVED: To solve the problem wherein a timeout error occurs against a job and a trouble occurs on a network if re-acquiring of the IP address by an information processor takes time, since the information processor has to perform re-acquiring of an IP address so that duplicating of IP address may not occur, if the information processor in a DHCP (Dynamic Host Configuration Protocol) environment returns from a sleep state by access from other device. PSOLUTION: When it becomes the time for requiring extension of a lease period, the information processor returns to a standby mode from a sleep mode, and transmits DHCPREQUEST for requesting the extension of the lease period to a DHCP server. If the information processor receives DHCPACK for permitting the extension of the lease period, it returns to the sleep mode again. PCOPYRIGHT: (C)2009,JPO&INPIT