Abstract: There is provided an asymmetric link delay compensation method in which a plurality of calibration profiles maybe used for providing a common network time estimate in a communication network. The communication network comprises a node at least two virtual paths, VP, connecting to one or more sync nodes. The at least two VPs are each associated with one or more respective predetermined calibration profiles with a respective delay correction factor. By identifying which of the VPs may be candidate VPs for calculating a time offset caused by the delay over the VPs and then ranking the candidates to select a best or a set of candidates for the calculation, an advantageous method for providing a common network time in the communication network is achieved.

Abstract: There is provided a GNSS independent method for asymmetry delay error compensation to minimize a time difference bias when using two-way time transfer in a communication network. The method includes establishing a bidirectional virtual path comprising at least one link path, LP1-LP4, over the network for communication between a first node A and a second node B by sending a bidirectional data stream over the virtual path and utilizing previously stored link profiles associated with a delay correction factor or a calibrated virtual path or a stable local clock in holdover mode to provide new delay correction factor to minimize a time difference bias in the local time in the second node.