A packet transfer scheme in a network system capable of realizing a high speed, large capacity inter-network communication under an internet environment. Systems, apparatuses, and methods are further configured to, in response to detecting the activity trigger, cause, by the paging monitor, a main receiver to transition from an energy conservation mode to an active mode to monitor the transmission medium for data traffic. A loading device is preferably provided that can load the beam by using a ceramic column positioned between the beam and the loading device.