Patent ID: 8971708
Filing Date: 2015-03-03
Classification: H04Q,H04W

Abstract:
1. A signal transmission system, comprising an Optical Distribution Network, ODN, an Optical Line Terminal, OLT, an Optical Network Unit, ONU, a Base Band Unit, BBU, Remote Radio Units, RRUs, a first signal processing apparatus and a second signal processing apparatus, wherein: the first signal processing apparatus is configured to multiplex a signal transmitted from the OLT to the ONU and signals transmitted from the BBU to respective RRUs, to transmit the signal resulting from multiplexing to the second signal processing apparatus over the ODN, to de-multiplex the signal transmitted from the second signal processing apparatus over the ODN to retrieve a signal transmitted from the ONU to the OLT and signals transmitted from the respective RRUs to the BBU and to transmit the signal retrieved through de-multiplexing, which is transmitted from the ONU to the OLT, to the OLT, and the signals retrieved through de-multiplexing, which are transmitted from the respective RRUs to the BBU, to the BBU; and the second signal processing apparatus is configured to multiplex the signal transmitted from the ONU to the OLT and the signals transmitted from the respective RRUs to the BBU, to transmit the signal resulting from multiplexing to the first signal processing apparatus over the ODN, to de-multiplex the signal transmitted from the first signal processing apparatus over the ODN to retrieve the signal transmitted from the OLT to the ONU and signals transmitted from the BBU to the respective RRUs and to transmit the signal retrieved through de-multiplexing, which is transmitted from the OLT to the ONU, to the ONU, and the signals retrieved through de-multiplexing, which are transmitted from the BBU to the respective RRUs, to the respective RRUs respectively; and wherein the signal transmission system further comprising; a filtering apparatus provided with one terminal connected with the second signal processing apparatus and the other terminal connected with one of the RRUs and configured to transmit a signal, transmitted from the second signal processing apparatus to the RRU connected therewith, to the RRU and a signal transmitted from the RRU connected therewith to the second signal processing apparatus.