Patent ID: 8463135
Filing Date: 2013-06-11
Classification: H04B,H04Q

Abstract:
1. A relay apparatus interposed in an optical transmission line through which different types of optical signals are transmitted in two opposite directions, the optical signals having different transmission speeds for each direction, the relay apparatus comprising: a first interface that branches an optical signal that is input in a first direction from one side of the optical transmission line, splits the optical signal in the first direction into optical signals on first and second paths and directs the optical signal to the first path and the second path, the first path being a processing path of an optical signal having a first transmission speed, the second path being a processing path of an optical signal having a second transmission speed that is different from the first transmission speed; a processing section that executes processing on an optical signal in the first direction propagating through each of the paths in accordance with a corresponding transmission speed, including a first processing section that executes processing corresponding to the optical signal at the first transmission speed on the optical signal on the first path in the first direction, including a regeneration processing section that executes regeneration processing on the optical signal at the first transmission speed by way of electric stage processing and a first delay section that delays the optical signal on the first path; and a second processing section that executes processing corresponding to the optical signal at the second transmission speed on the optical signal on the second path in the first direction; and a second interface that binds the first path and the second path, which are propagation paths of the optical signal on which the processing is executed by the processing section, by means of wavelength multiplexing and directs to the other end of the optical transmission line, wherein in an optical signal in the first direction, a waveband of the optical signal at the second transmission speed overlaps entirely or in part with a waveband of the optical signal at the first transmission speed.