Network Redundancy; Full Network Redundancy; Partial Network Redundancy - CENTURION SYSTEMS WIZO-LINK User Manual

SECTION 2
2. Network Redundancy
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 WiZo-Link device will continue to deliver the
most recent message, indefi 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 infl 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 WiZo-Link device.
2.1. Full Network Redundancy
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.
2.2. Partial Network Redundancy
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.
MESSAGE
FIGURE 2. FULL NETWORK REDUNDANCY
MESSAGE
FIGURE 3. PARTIAL NETWORK REDUNDANCY
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NETWORK REDUNDANCY

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A
B
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C C
D D
C C