Afar AR-24010E, Руководство оператора

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pulsAR radio Operator's Manual
You can easily implement a Linear Network as a subset of the Tree topology: configure the leftmost
radio as a root and all the radios in the network as a branch. Install each radio with two directional
antennas pointing at their two neighbors.
2.1.5 Loop Topology
If the geographic location of the various nodes is appropriate you can deploy a “loop” network. This
is similar to the Linear Network above with the addition of a link between the last node and the first.
In this deployment you configure every node as a branch. The radios automatically select one of the
nodes to become the root and the loop operates as a linear network with no traffic in the link to the
“left” of the self-selected root, which avoids a continuous loop. If any one of the individual links
goes down due to interference or obstructions, the loop reconfigures itself such that connectivity is
still kept between every node.
2.2 Roaming
2.2.1 Operation
With the roaming option, a remote, leaf, or even a branch node, can be configured with multiple
different receive channels (see command
roam ). With this capability you can deploy multiple
access points in a region where a group of mobile radios will move around. Mobile radios attach to
the network through any of the access points and automatically switch to a new one whenever the
need arises.
This capability is ideal for communications between a control center and vehicles, where the vehicles
must move beyond the range of a single hub radio.
All the access points are typically connected, through a backbone network, back to a central site.
This backbone network can be wired or wireless. You can use the tree topology and have each
branch and root serve both as access points and backbone nodes to bring the traffic back to the central
site (see figure).
The overall system supports the following features:
1. Mobile nodes automatically attach to the strongest access point.
2. As a mobile unit moves and the link to its parent fades, the mobile radio changes autonomously
to attach to a stronger parent.
2-5
Figure 2.2 - Linear Network Topology