Abstract: A method for maintaining finer synchronicity requirement (e.g. less than 1 ?s synchronicity) between sync master clock and UE clock in NR IIOT is disclosed. The present disclosure introduces a method to apply the UE clock update depending on the UL timing advance reception time. The present disclosure also introduces a new signaling to indicate scheduling request ID for propagation delay change and based on which triggering timing advance to maintain the finer synchronicity requirement between sync master and UE clock. This disclosure also introduces a new method to compute the propagation delay change at UE, and thereby performing propagation delay compensation to maintain finer synchronicity requirement between sync master and UE clock.