Fast synchronization scheduling apparatus and method for time slotted channel hopping in congested industrial wireless network environment

Abstract

The present invention provides, on the basis of congestion of a network, an arrangement state of nodes, and a quality of a communication channel, a fast synchronization scheduling apparatus and method for reducing a listening time of a node that desires to join. The fast synchronization scheduling apparatus and method include a radio frequency (RF) transmission and reception module configured to transmit and receive RF signals from nearby channels, a received signal strength indicator (RSSI) reception and storage module configured to receive RSSI values from the RF signals received from the RF transmission and reception module and store the received RSSI values, a channel sorting module configured to measure Channel Quality Estimation (CQE) values of the respective channels by putting the RSSI values of the respective channels received from the RSSI reception and storage module into a CQE formula and to sort the channels in order of highest CQE value (highest channel quality) based on the measured CQE values, and a channel setting and advertisement packet (ADV) reception module configured to receive an input of a channel having the highest CQE value from the channel sorting module, set the channel, and start a listening operation to receive an ADV in the set channel.