LAUSR

In this paper, we investigate the problem of space synchronization, i.e., synchronizing inertial readings from multiple mobile devices in the spatial dimension, in other words, multiple mobile devices are space synchronized to have the same 3-D coordinates except that each device is the origin of its corresponding coordinate. We propose a scheme called MObile Space Synchronization (MOSS) for devices with two sensors: an accelerometer and a gyroscope, which are available on most mobile devices. Accelerometer readings from multiple mobile devices on a human subject are used to achieve space synchronization when the human subject is moving forward, such as walking and running. Gyroscope readings from multiple mobile devices on a human subject are used to maintain space synchronization when the human subject stops moving forward, which means that we can no longer obtain the consistent acceleration caused by body moving forward. Experiment results show that our MOSS scheme can achieve an average angle deviation of 9.8° and an average measurement similarity of 97%.