1. A motion detection method comprising: detecting motion of an object in a space based on wireless signals communicated through the space by a wireless communication system comprising multiple wireless communication devices, each wireless signal being transmitted and received by a respective pair of the wireless communication devices on receipt of a beacon wireless signal transmitted by a hub device; by operation of one or more processors, computing motion indicator values for the respective wireless communication devices, the motion indicator value for each individual wireless communication device representing a degree of motion detected by the individual wireless communication device based on a subset of the wireless signals transmitted or received by the individual wireless communication device; and determining a location of the detected motion in the space based on the motion indicator values received in response to the beacon wireless signal.