ZFR1800 Series Wireless Field Bus System Technical Bulletin66
End Device
An end device is an optional network component. One or more end devices are
permitted on each wireless network. End devices may be low-power, child devices
that are typically battery powered. They do not communicate directly to other
devices but rely on their parent to forward and buffer messages for them.
ZigBee Network Topologies
A ZigBee network can adopt one of three topologies: star, tree, or mesh
(Figure 21). The topology defines how a message is routed from one node to
another. A star network has a central node through which all messages pass. A tree
network has a top node with a branch and leaf structure below in which messages
travel up and down the tree as necessary. A mesh network is a modified tree
network in which some leaves are linked, enabling messages to travel across the
tree when a suitable route is available. The ZFR1800 Series Wireless Field Bus
system uses a mesh network.
Figure 21: Topologies for Wireless Network
FIG:netk_struct
ED
R
C
Coordinator
Router
End Device
ED
C
R
R
R
R
ED
R
R
R
Star Tree
* Wireless ZFR 1800 Series System implementation.
ED
C
R
R
R
R
ED
R
R
R
ED
Mesh*
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