Patent ID: 8432850
Filing Date: 2013-04-30
Classification: H04B,H04J

Abstract:
1. A method of synchronising a plurality of nodes of a network to a reference time of a control centre, the method comprising: receiving, at the control centre, measurement data from each of the plurality of nodes; ranking, at the control centre, the plurality of nodes with respect to one another according to the measurement data; selecting, at the control centre, one or more master nodes from the plurality of nodes according to the ranking, at least one of the one or more master nodes being different from the control centre; assigning, at the control centre, each of the plurality of nodes to a corresponding master node; determining a first time offset between the local time measured at each node and the local time measured at its corresponding master node; determining a second time offset between the local time measured at each of the one or more master nodes and the reference time of the control centre; and determining the time offset between the local time measured at each node and the reference time of the control centre based on the first time offset and the second time offset.