Patent ID: 7830819

Claim:
A transmission characteristics analyzing device comprising: a transmission characteristics calculating unit for determining a direction in which a signal flows in each component of a communication network based on a transmitting point and a receiving point of the signal, the transmitting and receiving points being specified in the communication network, and for calculating transmission characteristics of the communication network in consideration of the direction of the signal, wherein said transmission characteristics calculating unit considers each component of the communication network to be a four-terminal circuit in determining the direction in which a signal flows in the component and in calculating the transmission characteristics of the network, and a modeling unit for modeling the communication network to be analyzed as including a tree structure, and when a component corresponding to the transmitting point of the signal and a component corresponding to the receiving point of the signal are specified in the communication network, said transmission characteristics calculating unit specifies a common ancestor component of the component for the transmitting point of the signal and the component for the receiving point of the signal in the tree structure, and divides the communication network into a first section starting from the component corresponding to the transmitting point of the signal and ending at a higher-level common component, a second section starting from the component corresponding to the receiving point of the signal and ending at the common ancestor component, and a higher-level section starting from the higher-level common component, to determine the direction in which the signal flows in each of the first, second, and higher-level sections.