The present invention presents a method providing an additional service during electric vehicle charging by (a) the electric vehicle charger (200) detecting connection with an electric vehicle (100) via a charging cable; (b) the electric vehicle charger (200) exchanging charging messages through a charging port in a PLC modem, when the connection is detected in step (a); and (c) the electric vehicle charger (200) providing an additional service for the electric vehicle once the charging begins, and therefore, providing additional services such as software updates, vehicle contents updates requested by a driver during the charging of the electric vehicle, and thus providing convenience for the car owners without visiting car diagnostic service center.

A transmission line set includes male plug transmission lines, having a first protruding portion and a second protruding portion, a third groove in a ring-shape formed between the first protrusion potion and the second protruding portion, at least two upper conductive interfaces and at least two lower conductive interfaces being symmetrically conductive with each other at opposite angles; and female plug transmission lines, having a third protruding portion and a fourth protruding portion, a fourth protruding portion formed in a ring shape and a second recess formed between the fourth protruding portion and the third protrusion, at least two upper conductive elastic sheets and at least two lower conductive elastic sheets being symmetrically conductive with each other at opposite angles.

A transmission line set includes male plug transmission lines, having a first protruding portion and a second protruding portion, a third groove in a ring-shape formed between the first protrusion portion and the second protruding portion, at least two upper conductive interfaces and at least two lower conductive interfaces being symmetrically conductive with each other at opposite angles; and female plug transmission lines, having a third protruding portion and a fourth protruding portion, a fourth protruding portion formed in a ring shape and a second recess formed between the fourth protruding portion and the third protrusion, at least two upper conductive elastic sheets and at least two lower conductive elastic sheets being symmetrically conductive with each other at opposite angles.

A network switch with: Power-over-Ethernet ports to connect to twisted-pair wires and transmit signals with a data packet comprising a target address and direct-current electric power via the twisted-pair wires; a first Powerline Communication port to connect to a pair of line wires supplying alternating-current electric power and to transmit signals with a data packet via the pair of line wires; a controller; and a memory storing target addresses by data packet. The controller may: receive a signal from one of the Power-over-Ethernet ports or the Powerline Communication port; demodulate the inbound signal; produce a data packet from the demodulated inbound signal; determine the target address of the data packet; look up the determined target address; produce an outbound signal modulated for the target port; and send the modulated outbound signal to the target port.

An electronic device includes a power line communication circuit configured to perform power line communication with an external device, the power line communication circuit including: a power line switch provided between a regulator output node and a POGO output node; and a pull-up resistance provided between the POGO output node and a power supply voltage; and a processor configured to control the power line communication circuit, wherein the processor is further configured to: based on receiving a start signal instructing an initiation of high-speed communication, turn off the power line switch to block an electrical coupling between the regulator output node and the POGO output node, and perform the high-speed communication with the external device by connecting coupling the POGO output node to the power supply voltage through the pull-up resistance or connecting coupling the POGO output node to a ground voltage, based on according to output data.

A control system for controlling a power line network having a power line, at least one electric appliance and at least one controller includes a central control unit, configured to realize programmable controls over the appliance by the controller with signals transmitted through the power line. An on-site control unit includes at least one modulator and at least one demodulator coupled with the central control unit. Each modulator is configured, upon receiving a first control signal from the controller, to generate and transmit a second control signal to the central control unit that is configured, upon receiving the second control signal, to generate and transmit a third control signal to the demodulator. Each demodulator is configured, upon receiving the third control signal, to generate and transmit a fourth control signal to the appliance.

The present invention presents a method providing an additional service during electric vehicle charging by (a) the electric vehicle charger (200) detecting connection with an electric vehicle (100) via a charging cable; (b) the electric vehicle charger (200) exchanging charging messages through a charging port in a PLC modem, when the connection is detected in step (a); and (c) the electric vehicle charger (200) providing an additional service for the electric vehicle once the charging begins, and therefore, providing additional services such as software updates, vehicle contents updates requested by a driver during the charging of the electric vehicle, and thus providing convenience for the car owners without visiting car diagnostic service center.

A network switch with: Power-over-Ethernet ports to connect to twisted-pair wires and transmit signals with a data packet comprising a target address and direct-current electric power via the twisted-pair wires; a first Powerline Communication port to connect to a pair of line wires supplying alternating-current electric power and to transmit signals with a data packet via the pair of line wires; a controller; and a memory storing target addresses by data packet. The controller may: receive a signal from one of the Power-over-Ethernet ports or the Powerline Communication port; demodulate the inbound signal; produce a data packet from the demodulated inbound signal; determine the target address of the data packet; look up the determined target address; produce an outbound signal modulated for the target port; and send the modulated outbound signal to the target port.

A control system for controlling a power line network having a power line, at least one electric appliance and at least one controller includes a central control unit, configured to realize programmable controls over the appliance by the controller with signals transmitted through the power line. An on-site control unit includes at least one modulator and at least one demodulator coupled with the central control unit. Each modulator is configured, upon receiving a first control signal from the controller, to generate and transmit a second control signal to the central control unit that is configured, upon receiving the second control signal, to generate and transmit a third control signal to the demodulator. Each demodulator is configured, upon receiving the third control signal, to generate and transmit a fourth control signal to the appliance.

An electronic device includes a power line communication circuit configured to perform power line communication with an external device, the power line communication circuit including: a power line switch provided between a regulator output node and a POGO output node; and a pull-up resistance provided between the POGO output node and a power supply voltage; and a processor configured to control the power line communication circuit, wherein the processor is further configured to: based on receiving a start signal instructing an initiation of high-speed communication, turn off the power line switch to block an electrical coupling between the regulator output node and the POGO output node, and perform the high-speed communication with the external device by connecting coupling the POGO output node to the power supply voltage through the pull-up resistance or connecting coupling the POGO output node to a ground voltage, based on according to output data.