1. An apparatus comprising: a receiving unit configured to receive a packet transmitted via a network, while the apparatus is in a power saving mode: a determining unit configured to determine whether or not the received packet a packet according to a WS-Discovery protocol; an analyzing unit configured to analyze succeeding packet data described in XML to produce an analysis result, in the case where the packet is the packet according to the WS-Discovery protocol; and an instructing unit configured to instruct the apparatus to return from the power saving mode to a normal power mode in response to the analysis result.