METHOD FOR SYNCHRONIZING OF CLOCK BETWEEN SENSOR NODES IN WIRELESS SENSOR NETWORK

摘要

PURPOSE: A clock synchronizing method between sensor nodes in a wireless sensor network is provided to perform clock offset compensation and clock skew compensation between sensor nodes. CONSTITUTION: A clock offset of a sensor node is corrected in order to synchronize a clock of the sensor node which transmits the message(S410). The sensor node receives the message stores clock offset correction time(S420). In case the clock offset correction is not initial correction(S430), clock skew correction is performed by using a relative clock skew between i-th clock offset and (i+1)-th clock offset(S440). [Reference numerals] (AA) Start; (BB) Yes; (CC) No; (DD) End; (S410) Correcting clock offset; (S420) Storing clock offset; (S430) Verifying whether or not initial correction; (S440) Skew correction