Patent ID: 9077431
Filing Date: 2015-07-07
Classification: H04B

Abstract:
1. A relay device which is interposed between a first transmission path and a second transmission path and is used in a communication system allowing communication by use of a first communication signal and a second communication signal superimposed on the first communication signal which are transmitted through the first transmission path and the second transmission path, the relay device comprising: a first extraction unit configured to extract the second communication signal from a signal transmitted through the first transmission path; a first shaping unit configured to subject the second communication signal extracted by the first extraction unit, to shaping; a second superimposing unit configured to superimpose the second communication signal subjected to shaping by the first shaping unit, on the first communication signal on the second transmission path, to send the second communication signal to the second transmission path; a second extraction unit configured to extract the second communication signal from a signal transmitted through the second transmission path; a second shaping unit configured to subject the second communication signal extracted by the second extraction unit, to shaping; a first superimposing unit configured to superimpose the second communication signal subjected to shaping by the second shaping unit, on the first communication signal on the first transmission path, to send the second communication signal to the first transmission path; wherein: the relay device further comprises: the first switch is controlled by a first control signal to be turned off when the second communication signal is relayed from the second transmission path to the first transmission path, and the second switch is controlled by a second control signal to be turned off when the second communication signal is relayed from the first transmission path to the second transmission path, and wherein: the relay device further comprises: