Patent ID: 8582481

Claim:
A system for providing a Low power Wireless Personal Area Network, the system comprising: a mobile node comprising an active device comprising an FFD (Full Function Device) or an RFD (Reduced Function Device) configured to transmit at least one data packet within an MST (Maximum Sleep Time), the mobile node moving across PANs (Personal Area Networks); a plurality of sensor nodes configured to overlap a transmission range and configured to measure a moving direction of the mobile node wherein one of the sensor nodes is configured to measure a distance of the mobile node; a border node, at a periphery of the PANs, configured to detect a movement of the mobile node reaching to an inner region from an outer region of the respective PANs, and in response to detection of the mobile node within the inner region, to convert a quasi-sleep state of the border node into an active state, wherein a transceiver is turned-on from a quasi-sleep state and a beacon is transmitted to the mobile node in an active state, the beacon comprising a sensor node address and a PAN identifier; and a gateway being directly connected with at least one of the sensor nodes and corresponding to an intermediate point in response to detection of a communication of the mobile node and/or the at least one of the sensor nodes with an external device outside the PAN.