NETWORK SYNCHRONISATION

摘要

A method of synchronising an element in a network, by selecting from a plurality of clock references, the clock references being transmitted from respective neighbouring network elements, wherein trail information relating to the trail of each clock reference through elements in the network, is determined by the respective neighbouring elements, and wherein the selection is made on the basis of at least the trail information. The trail information may comprise a count of network elements in the trail through the network followed by each clock reference. The trail information may be transmitted using the network management channels or as part of synchronisation status message information in an SDH system.