Apparatus, method and system for controlling a load device via a power line by using a power negotiation protocol
The present invention proposes to use a power negotiation connection (e.g. the VBUS channel) of a power delivery interface for transmitting or receiving control commands or, respectively, status information to/from a lighting device. The power negotiation connection can be used as a communication channel that is fully independent of the data connection. It uses, for example, different protocols and different wires than the data connection. Control commands, such as dim level or color, can be encoded in a vendor defined message of a related power negotiation protocol.
1. An apparatus for controlling a load device, said apparatus comprising:
a control unit adapted to use a power negotiation protocol signaling in order to exchange at least one of control and status information with the load device, wherein the power negotiation protocol used to exchange the control or status information is a USB Power Delivery power negotiation protocol; and
a transceiver for transmitting or receiving, only via power supply USB pins, the control or status information to/from the load device over a power line used for supplying power to said load device.
2. The apparatus according to claim 1 , wherein the control unit is adapted to encode the control or status information in a vendor defined message according to the USB Power Delivery power negotiation protocol.
3. The apparatus according to claim 1 , which is adapted to receive or transmit control commands or status packets from/to a lighting control system.
4. The apparatus according to claim 3 , wherein the apparatus is adapted to receive or transmit the control commands or the status information from/to the lighting control system by using a UPnP lighting control protocol.
5. The apparatus according to claim 1 , which is adapted to signal to an installer or user an information which indicates a successfully established communication channel over the power line to the load device.
6. A load device comprising an apparatus according to claim 1 .
7. The load device of claim 6 , wherein said load device is a lighting device or a sensor device.
8. A power supply device comprising an apparatus of claim 1 .
9. A system comprising a power supply device of claim 8 and at least one load device of claim 6 which is connected to the power supply device.
10. The system of claim 9 , wherein the power supply device comprises a USB-PD power supply unit having a power input (PI) and a data port (DP).
11. The system of claim 9 , further comprising a hub device having a power supply from mains and a data connection supporting UPnP, wherein the hub device is adapted to relay messages between vendor specific lighting codes and lighting related UPnP packages.
12. A method of controlling a load device said method comprising:
using a power negotiation protocol signaling in order to exchange at least one of control and status information with the load device; and
transmitting or receiving the control or status information, only via power supply USB pins, over a power line used for supplying power to the load device, wherein
the power negotiation protocol used to exchange the control or status information is a USB Power Delivery protocol.
13. A computer program product comprising non-transitory computer readable code means for producing the steps of the method of claim 12 when run on a computing device.