Patent ID: 7991016
Filing Date: 2011-08-02
Classification: H04J,H04W

Abstract:
1. A network node for an internet protocol (IP)-based mobile backhaul network, comprising: a primary slave clock operable to synchronize with a primary master clock via a bi-directional primary multi-segment pseudowire coupled between the network node and an additional network node on which the primary master clock is located, the primary slave clock and the primary master clock forming a primary clock system; a secondary slave clock operable to synchronize with a secondary master clock on the additional network node via a bi-directional secondary multi-segment pseudowire coupled between the network node and the additional network node, the secondary slave clock and the secondary master clock forming a secondary clock system; and a clock controller operable to maintain the secondary clock system in a hot-stand-by mode, and upon determining that a switch-over is needed, to automatically switch from the primary clock system to the secondary clock system.