公开(公告)号：EP2317827B1

公开(公告)日：2018-04-25

申请号：EP10185276.2

申请日：2010-10-01

Applicant: IXYS Intl Ltd.

Inventor： Pope, Steven M.

IPC: H05B37/02 ,  G08C17/02

CPC classification number: H05B37/0272 ,  G08C17/02 ,  G08C2201/51 ,  G08C2201/93 ,  H05B41/295

Abstract: A system involves a plurality of RF-enabled occupancy detectors. Each occupancy detector communicates with and controls an associated plurality of RF-enabled fluorescent lamp starter units. A network master has an RF transceiver used to communicate with the occupancy detectors using a first protocol, thereby retrieving status information from the starter units. The network master also has a second RF transceiver for communicating directly with a cellular telephone using a second protocol. A user can use the cellular telephone to control and interact with the lighting system through the network master, and/or to retrieve status information from the network master. The network master automatically generates and sends email alerts to the user by sending the alerts to an email server. The mail server forwards the emails to the cellular telephone via a cellular telephone network. Alerts may, for example, indicate a low battery voltage condition or that a lamp needs replacement.

公开(公告)号：EP2306777B1

公开(公告)日：2016-05-11

申请号：EP10174713.7

申请日：2010-08-31

Applicant: IXYS Intl Ltd.

Inventor： Pope, Steven M.

IPC: H04W52/02 ,  H05B37/02 ,  H04W48/12 ,  G08C17/02 ,  H04W74/08 ,  H04W84/20 ,  H04W74/00

CPC classification number: H04W52/0229 ,  G08C17/02 ,  G08C2201/12 ,  H04W74/085 ,  H04W84/20 ,  H05B37/0272 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162

Abstract: A low-power wireless network involves a master and a plurality of RF-enabled fluorescent lamp starter units. In each of a plurality of intervals, a starter wakes up and listens for a beacon, regardless of whether a beacon is transmitted during that interval or not. The starter operates in a low power sleep mode during the majority of the interval. The master can transmit during the beacon slot time of any interval, but typically only transmits frequently enough to maintain starter synchronization. If the master wishes to communicate with the starters with reduced latency, then the master can transmit a beacon in the next interval. Beacon slot time is varied within the interval (for example, from interval to interval or from group of intervals to group of intervals) in a pseudo-random time-hopping fashion known to both the starters and the master, thereby reducing persistence of collisions with similar networks.