Communication apparatus, communication system, wire harness and communication method
AssigneesAutonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
InventorShinichi Ishiko
Life of this patent
Estimating the term…
Abstract
Plural electronic control units (ECUs) are connected to each other by an electric power line that is for supplying electric power. Each ECU sends information with a carrier wave having a first frequency lower than a dip frequency estimated by the physical condition and the circuit structure of electric power line, or having a second frequency lower than the first frequency. Or, the physical condition and the circuit structure of electric power line are determined, on the contrary, to make the dip frequency become higher than the frequency of utilized carrier wave. The frequency utilized for sending information may be selected in accordance with the contents of information.
Claims19
A communication apparatus that can be connected to an electric power line, comprising:
- an electric power obtaining unit that obtains an electric power through the electric power line;
- a data communicating unit that sends and receives data through the electric power line;
- and
- a deciding unit that decides a sending frequency utilized for the data sent by the data communicating unit;
- wherein
- the sending frequency decided by the deciding unit is a frequency lower than a dip frequency expected in accordance with a circuit structure of the electric power line, and
- the communication apparatus controls the data communicating unit and the deciding unit with utilizing the electric power obtained by the electric power obtaining unit.
A communication system that includes a communication apparatus connected to another communication apparatus through an electric power line, comprising:
- an electric power obtaining unit that obtains an electric power through the electric power line;
- a data communicating unit that sends and receives data between the communication apparatus and said another communication apparatus connected with each other through the electric power line;
- and
- a deciding unit that decides a sending frequency utilized for the data sent by the data communicating unit;
- wherein
- the sending frequency decided by the deciding unit is a frequency lower than a dip frequency expected in accordance with a circuit structure of the electric power line, and
- the communication system controls the data communicating unit and the deciding unit with utilizing the electric power obtained by the electric power obtaining unit.
A communication method for sending and receiving data with utilizing communication apparatuses connected with each other through an electric power line, comprising steps of:
- obtaining an electric power through the electric power line;
- controlling the communication apparatuses with utilizing the obtained electric power;
- sending and receiving a data through the electric power line between the connected communication apparatuses;
- acquiring a dip frequency expected in accordance with a circuit structure of the electric power line;
- and
- deciding a sending frequency utilized for sending a data between the connected communication apparatuses, which is a frequency lower than the acquired dip frequency.
Dependencies are inferred from the claim text.