Device and method for time synchronisation in a communication network

The device has a controller (PI) placed in a network node and determining a controlled pulse counter status (CT) representing estimation of a reference clock-pulse counter status (CMT) and comprising a continuous path. The controller estimates a current ratio of a reference clock frequency of a reference clock to a node clock frequency of the internal clock of the network node. The controller calculates a control deviation (D) between an estimated reference clock-pulse counter status (RMT) and the controlled pulse counter status. The controller is selected from a group consisting of a digital linear controller and a continuous linear controller that is selected from a group consisting of a proportional integral controller and a proportional integral-derivative (PID) controller. Independent claims are also included for the following: (1) a method for facilitating time synchronization in a communication network (2) a network node comprising an internal clock (3) a computer-readable storage medium comprising a set of instructions for facilitating time synchronization in a communication network.