Systems, methods, and instrumentalities are provided to implement a method for radio environment, measurement (REM) scheduling, information extraction, storage and processing to generate terrain and object mapping/identification using higher frequency radio signals, directional transmission techniques and external database information. Described are wireless transmit/receive units (WTRUs) comprising a processor configured to, when the WTRU is in an idle state, receive a common control channel from a millimeter wave base station (mB), decode a measurement schedule included in the common control channel, wherein the measurement schedule includes one or more slots during which sounding signals will be sent, and, determine a slot during which the WTRU is available to measure a sounding signal, and, when the WTRU is in a connected state, receive a dedicated control channel from a millimeter wave base station (mB), decode a measurement schedule and a receiver configuration included in the dedicated control channel, wherein the measurement schedule and the receiver configuration are specific to the WTRU, and wherein the measurement schedule includes one or more slots during which sounding signals will be sent, and determine a slot during which the WTRU is available to measure a sounding signal.