AvMesh
®
RF Communications Systems
Installation & Service Manual
Latest products and information available at
www.avlite.com
21
•
Reserve Nodes
The reserve nodes make up the reserve network. This type of node is able to receive and
decode signals from either the Avlite wireless remote controller, a primary node or another
reserve node and act upon the signal itself. The reserve node is also able to pass on the
received signal to other lights within range.
•
Listen only Lights
A light is configured as listen only upon first start-up. Listen only lights receive and decode
signals from either the Avlite wireless remote controller, a primary node or a reserve node
and acts upon the signal itself. However, listen only lights are not able to pass on signals to
other lights.
From the above descriptions, we can see that the primary and reserve nodes are, in
essence, repeaters as they repeat the received signals to all the other lights within range.
This includes all light groups, not just the light groups they belong to. The light groups they
do not belong to will simply pass the signal on to the surrounding lights within range and
will not act upon the signal. Primary and reserve nodes are therefore required to behave as
both a transmitter and receiver.
Upon first start-up or after 10 days of operation, each light (node) in the system runs
through a network set-up procedure in which it effectively ‘listens’ to the AvMesh
TM
Communications System and determines which node types (i.e. primary, reserve or listen
only lights) are missing. The light then configures itself according to these missing node
types.
An example of an AvMesh
TM
runway system is shown below.
The primary nodes are
red
,
reserve nodes are
green
and listen only lights are
white
.
When a light is turned on (e.g. node 3 in figure 9) either after first start up or after the
10-day reset, it will be a listen only light. This light will first check if it is within range of at
least 3 other primary nodes. Since it will not be (because it is the first light), it will become
a primary node and will broadcast a signal indicating that it is a primary node. Since this
is the first primary node, it will also choose a network ID. Technically, the network ID of this
first light will be the lowest 7 bits of its RFID with Bit 8 set to true (i.e. the initial network ID
will be a number from 128 to 255).
Figure 9:
The first node to turn on will become a primary node
4.2 Network set-up procedure
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