Patent ID: 8374256
Filing Date: 2013-02-12
Classification: H04B

Abstract:
1. A communication apparatus, which performs data communication through a power line transmitting alternating current having a predetermined frequency and which employs a first communication method, the communication apparatus comprising: a data communication circuit that performs data communication; and a controlling circuit that controls the data communication circuit, wherein when a signal transmitted from a communication device exists within a notice period but no signal transmitted from the communication apparatus exists within the notice period, the controlling circuit precludes the data communication performed by the data communication circuit while the communication device performs data communication through the power line employing a second communication method different from the first communication method, wherein the notice period is synchronized with the predetermined frequency of the alternating current, and wherein the communication apparatus and the communication device, employing the first and the second communication methods, respectively, to generate communication signals, are unable to demodulate the communication signals transmitted from one another.