Power line communication method and device

A power line communications device, comprising:

• a Universal Serial Bus (USB) interface, a protocol conversion module, a first signal conversion module, a second signal conversion module, an amplifier, a coupler, and a power line interface, wherein:
• a first end of the USB interface is connected to a first end of the protocol conversion module, a second end of the protocol conversion module is connected to a first end of the first signal conversion module, a second end of the first signal conversion module is connected to a first end of the coupler, and a second end of the coupler is connected to a first end of the power line interface;
• the USB interface is configured to:
• connect to a terminal device by using a data cable, receive a first network signal sent by the terminal device, and send the first network signal to the protocol conversion module;
• the protocol conversion module is configured to:
• convert the first network signal of a USB protocol into a first network signal of an Ethernet protocol, and send the converted first network signal to the first signal conversion module;
• the first signal conversion module is configured to:
• convert the converted first network signal into a first electrical signal, and send the first electrical signal to the coupler;
• the coupler is configured to send the first electrical signal to the power line interface;
• the power line interface is configured to:
• connect to a power line, and send the first electrical signal to the power line;
• a first end of the second signal conversion module is connected to the second end of the first signal conversion module and a second end of the second signal conversion module is connected to the first end of the coupler, wherein the second signal conversion module is configured to:
• receive the first electrical signal sent by the first signal conversion module;
• convert the first electrical signal from a digital signal into an analog signal;
• and
• send the converted first electrical signal to the coupler;
• a first end of the amplifier is connected to a third end of the second signal conversion module and a second end of the amplifier is connected to a third end of the coupler, wherein the amplifier is configured to:
• receive the converted first electrical signal sent by the second signal conversion module;
• amplify the converted first electrical signal;
• and
• send the amplified first electrical signal to the coupler.

A power line communications device, comprising:

• a Universal Serial Bus (USB) interface, a protocol conversion module, a first signal conversion module, a second signal conversion module, a coupler, and a power line interface, wherein:
• a first end of the USB interface is connected to a first end of the protocol conversion module, a second end of the protocol conversion module is connected to a first end of the first signal conversion module, a second end of the first signal conversion module is connected to a first end of the coupler, and a second end of the coupler is connected to a first end of the power line interface;
• the USB interface is configured to:
• connect to a terminal device by using a data cable, receive a first network signal sent by the terminal device, and send the first network signal to the protocol conversion module;
• the protocol conversion module is configured to:
• convert the first network signal of a USB protocol into a first network signal of an Ethernet protocol, and send the converted first network signal to the first signal conversion module;
• the first signal conversion module is configured to:
• convert the converted first network signal into a first electrical signal, and send the first electrical signal to the coupler;
• the coupler is configured to send the first electrical signal to the power line interface;
• the power line interface is configured to:
• connect to a power line, and send the first electrical signal to the power line;
• a first end of the second signal conversion module is connected to the second end of the first signal conversion module and a second end of the second signal conversion module is connected to the first end of the coupler, wherein the second signal conversion module is configured to:
• receive the first electrical signal sent by the first signal conversion module;
• convert the first electrical signal from a digital signal into an analog signal;
• and
• send the converted first electrical signal to the coupler;
• the power line interface is further configured to:
• receive a second electrical signal sent by the power line, and send the second electrical signal to the coupler;
• the coupler is further configured to:
• obtain a third electrical signal from the second electrical signal, and send the third electrical signal to the second signal conversion module, wherein the third electrical signal is an electrical signal in a preset frequency band;
• the second signal conversion module is further configured to:
• convert the third electrical signal from an analog signal into a digital signal, and send the converted third electrical signal to the first signal conversion module;
• the first signal conversion module is further configured to:
• convert the converted third electrical signal into a second network signal, and send the second network signal to the protocol conversion module;
• the protocol conversion module is further configured to:
• convert the second network signal of the Ethernet protocol into a second network signal of the USB protocol, and send the converted second network signal to the USB interface;
• and
• the USB interface is further configured to:
• send the second network signal of the USB protocol to the terminal device for triggering the terminal device to access a network by using the second network signal of the USB protocol.

A power line communication method, comprising:

• receiving a first electrical signal sent by a power line;
• obtaining, from the first electrical signal, a second electrical signal in a preset frequency band;
• converting the second electrical signal into a first network signal;
• converting the first network signal of an Ethernet protocol into a first network signal of a Universal Serial Bus (USB) protocol;
• and
• sending the first network signal of the USB protocol to the terminal device for triggering the terminal device to access a network by using the first network signal of the USB protocol.