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This paper addresses the problem of clock skew and offset estimation for theIEEE 1588 precision time protocol. Built on the classical two-way messageexchange scheme, IEEE 1588 is a prominent synchronization protocol for packetswitched networks. It is employed in various applications including cellularbase station synchronization in 4G long-term evaluation backhaul networks,substation synchronization in electrical grid networks and industrial control.Due to the presence of random queuing delays in a packet switched network, therecovery of clock skew and offset from the received packet timestamps can beviewed as a statistical estimation problem. Recently, assuming perfect clockskew information, minimax optimum clock offset estimators were developed forIEEE 1588. Building on this work, we develop minimax optimum clock skew andoffset estimators for IEEE 1588 in this paper. Simulation results indicate theproposed minimax estimators exhibit a lower mean square estimation error thanthe estimators available in the literature for various network scenarios.

Minimax Optimum Clock Skew and Offset Estimators for IEEE 1588