CENTURION SYSTEMS WIZO-LINK - 2 Network Redundancy; Full Network Redundancy; Partial Network Redundancy

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NETWORK REDUNDANCYSECTION 2
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Full network redundancy takes full advantage of the mesh network integrity by ensuring
that the message that needs to travel will reach its destination. Redundancy can be
achieved with three devices or more. The  device will continue to deliver the
mostrecentmessage,indenitely,untilthemessageisdelivered.Whenthemessage
is delivered, an acknowledgement is returned; all messages sent have end to end
acknowledgements.
In a mesh network, each device is connected to every other device in the network. In
an ideal environment, transmission is always perfect, and the message always arrives
intact.However,inpractice,manyfactorsinuencesignaltransmissionandthemesh
network principles and topology ensure that the message will always be delivered to its
destination. This is achieved by;
1. Line-of-sight or a direct connection,
2. through routing via adjacent devices.
The network strength or health is indicated locally at each device.
As shown in Figure 2, node A has
a direct line-of-sight connection to
node C. Node A can also route its
message via node B or node D to
reach node C.
The message has three routes
through which it can travel, which
guarantees that the message is
received, unless there is total
network failure.
Partial redundancy is achieved when
a node has at least one alternative
path to deliver its message to the
target device.
As shown in Figure 3, A has a line of
sight to node C. If the line of sight
is interrupted, the message will be
redirected via the mesh network via
node B.
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FIGURE 2. FULL NETWORK REDUNDANCY
FIGURE 3. PARTIAL NETWORK REDUNDANCY
C
C
D
C
D
C
A
A
B
B
MESSAGE
MESSAGE