An efficient method of sub-signal channel modulation on hitless redundancy switching systems

Abstract

In the hitless redundancy switching system, the selector of the redundancy switching device is controlled on the basis of the control information such as the connection status of the path to transmit frames, end-to-end delay of the path, and jitter. However, the control signal transmitted superimposed on the main signal channel in the hitless redundancy switching system is not highly confidential because all the information is transmitted superimposed on the two paths. In our previous study, we modulated the transmission timing of frames in the main signal channel by assigning “0” and “1” codes to the two paths in the hitless redundancy switching system. In this paper, we propose a method to efficiently modulate sub-signal channels in a hitless redundancy switching system to improve the communication bandwidth, and evaluate its effectiveness in a numerical simulation.