Communication protocol for a lighting control system
US8306051B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2007 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Jun 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/195
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communication protocol for a lighting control system having a plurality of control devices coupled to a communication link uses a polling technique to coordinate the transmission of digital messages between the control devices. When the control devices are powered up, one of the control devices is established as a “master” device. During normal operation, the master device transmits a standard poll message to each of the control devices in succession using a unique semi-permanent Poll ID for each of the control devices. The master device periodically transmits a Poll-ID-Request poll message to the control devices allow those devices that do not have a Poll ID to request a Poll ID. If a control device determines either that the master device is not transmitting poll messages to it, or that another control device has the same Poll ID, the control device drops its Poll ID and acquires another Poll ID.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.