METHOD FOR SYNCHRONIZATION AND NETWORK SELF HEALING BETWEEN NODES IN UBIQUITOUS SENSOR NETWORK ENVIRONMENT

A method for performing synchronization and network self healing between nodes in ubiquitous sensor network environment is provided to improve reliability of network communications by synchronizing clocks of all child nodes based on parent node. A high rank parent node periodically transmits signals to a low rank child node(10). A is transmission time from a node corresponding to a first hop level. The time is predicted based on clock time of a node corresponding to a second hop level. B is transmission time calculated by the node corresponding to the first hop level. A difference value(15) of A and B is a value of real clock error of the node corresponding to the second hop level and the node corresponding to the first hop level. Synchronization is performed by error correction between clocks of the nodes corresponding to the hop levels.