Patent ID: 8161301

Claim:
A method of waking up a main system, comprising: receiving a packet; confirming whether the received packet is a response to internet protocol (IP) address request from a dynamic host configuration protocol (DHCP) server; confirming whether the received packet is a request for waking up a main system in a sleeping state, from a host; certifying whether a user of the host is a legitimate user of the main system, if the received packet is the waking up request from the host, not the response from the DHCP server; and transmitting a wake-up signal to the main system when it is certified that the user is legitimate, wherein if the host has the medium access control (MAC) address of the main system and does not have internet protocol (IP) address of the main system, the packet includes the MAC address of the main system and IP broadcast address, and wherein if the host does not have the MAC address of the main system and has the IP address of the main system, the packet includes MAC broadcast address and the IP address of the main system.