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Grouping wireless lighting nodes according to a building room layout

A technology for lighting nodes and buildings, applied in lighting devices, radio wave measurement systems, data exchange networks, etc., can solve the problem of not specifically solving the problem of assigning lighting nodes to switch control nodes

Active Publication Date: 2008-03-05
SIGNIFY HLDG BV
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Problems solved by technology

Another disadvantage is that the tasks assigned by the nodes are technical jobs that require the support of lighting control experts
[0004] Numerous previous technical documents (such as WO01 / 97466, and Patwar i et al.: "RelativeLocation Estimation in Wireless Sensor Networks", IEEE Transactions on Signal Processing, vol. 51, no. 8, August 2003) have addressed problems related to spatially locating wireless nodes in a network , but none of them specifically address the automatic assignment of lighting nodes to switch control nodes

Method used

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  • Grouping wireless lighting nodes according to a building room layout
  • Grouping wireless lighting nodes according to a building room layout

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Embodiment Construction

[0022] A number of techniques are available for determining the spatial location of wirelessly connected nodes in a network. One example is the signal "time of flight" (ToF) method, where the time it takes for a signal to pass between nodes is used to estimate the distance between nodes. This provides a very accurate estimate of the distance between nodes and is relatively immune to physical obstruction between signaling nodes. Therefore, this is a common method for determining distances between nodes. An alternative technique is to use Received Signal Strength Indication (RSSI) measurements to provide an estimate of the distance between two nodes. Because received signal strength decreases with distance, the RSS I reading turns into an actual estimate of distance.

[0023] RSSI technology is slightly less accurate than ToF ranging and is usually less used for automatic position detection. A characteristic of RSSI ranging is that it is subject to absorption and dispersion b...

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Abstract

A method determines the relative locations of wirelessly controllable service device nodes and switching control nodes within a building. At least some of the service device nodes are located in different rooms of the building and should be allocated to switching control nodes on a room-specific basis. Wireless communication is established between the nodes to determine relative spatial positions of selected nodes using received signal strength indication (RSSI) values indicative of a distance of separation between two communicating nodes. The service device nodes are then grouped into two or more groups, a first group corresponding to service device nodes in one room and a second group corresponding to service device nodes in a second room, based on spatial distribution of the service device nodes as indicated by the RSSI values. The service device nodes of each group are then allocated to at least one associated switching control node.

Description

technical field [0001] The present invention relates to a method and arrangement for managing wireless lighting nodes in a building, in particular to assigning each of several lighting nodes or luminaires to a respective switch control node. Background technique [0002] The use of wirelessly controlled lighting units or luminaires (hereinafter referred to as light nodes) in buildings is becoming more and more common, as this can substantially reduce lighting installation costs. The physical wiring between the lighting switch or activation sensor (hereinafter referred to as the switch control node) and the lighting node is replaced by a wireless (eg radio) connection. All lighting nodes and switching control nodes only need to be connected to a suitable power source and not electrically grounded. Each luminaire includes a wireless receiver and each switch control node includes a wireless transmitter. During management, each luminaire is identified and assigned to a specifi...

Claims

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Application Information

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IPC IPC(8): H05B37/02H04L12/24
CPCH04L41/0893H05B37/0272H04L41/12H04L41/22H05B37/02G01S5/0289H05B47/10H05B47/19
Inventor S·M·比特彻斯P·R·西蒙斯
Owner SIGNIFY HLDG BV
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