Mobile platform power management is an important problem especially for battery-powered small form factor platforms such as smartphones, tablets, wearable devices, Internet of Things (IOT) devices, and the like. A low-power wake-up radio cooperates with a mobility manager which is configured to receive information from one or more sensors and determine a mobility management frame. The mobility management frame specifies transmitter operation, such as a number and time interval over which to transmit a number of wake-up packets, which are usable by the low-power wake-up radio to control main radio operation in the wireless communications device.