Patent ID: 9184827
Filing Date: 2015-11-10
Classification: H04B

Abstract:
1. A relay device that relays a signal in which a plurality of signals having respectively different frequencies are multiplexed between a first communication device on a transmission side and a second communication device on a reception side, the relay device comprising: demultiplexing circuitry that demultiplexes a signal received from the first communication device to a plurality of frequencies; relay-method decision circuitry that decides which relay method is performed on a signal having been demultiplexed by the demultiplexing circuitry from among a plurality of relay methods, including regenerative relay applied to a signal having a line quality less than a first predetermined threshold and transparent relay applied to a signal having a line quality equal to or larger than the first predetermined threshold; signal regeneration circuitry that performs demodulation, decoding, coding, and modulation on a signal decided to undergo regenerative relay by the relay-method decision circuitry; and multiplexing circuitry that multiplexes a signal decided to undergo transparent relay by the relay-method decision circuitry and a signal regenerated by the signal regeneration circuitry, wherein the relay-method decision circuitry has an input portion connected to the demultiplexing circuitry and an output portion connected to the signal regeneration circuitry and the multiplexing circuitry, wherein the relay-method decision circuitry includes: wherein the decision sub-circuitry portion decides to perform regenerative relay on a signal having a line quality less than the first predetermined threshold and equal to or larger than a second predetermined threshold, less than the first predetermined threshold, among the demultiplexed signals, and decides not to relay and to discard a signal having a line quality less than the second predetermined threshold among the demultiplexed signals.