A player object is caused to perform a motion in a virtual game world in accordance with information corresponding to a biological signal acquired from a player. The communication apparatus of a device on a searched side receives a search packet via one of a first and second NIC of the apparatus from a device on the searching side, and determines whether information that is same as information indicating the received search packet is stored. The LE sends, to the LMUs, reception instructions with characteristics of the signal transmission from the UE and each LMU receives, from the LE, the reception instructions.