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5.5.2 Extending the coverage area
When units are spread over two RF coverage areas, the user needs to identify the one that will form the
backbone between the coverage areas so that any unit can talk to any other one regardless of their loca-
tions. Identifying the backbone of the network should be done even before selecting IP Forwarding modes
(Router/Bridge). Configuring the units to function in two coverage areas is a multi-step procedure. First,
since all units in the network must be synchronized with the master unit, it is imperative to identify a unit
that will be repeating the master sync for all distant units. This unit must be set to Repeater mode (see
section 5.5.2.1). Next, the unit forming the backbone between the coverage areas must be configured to
repeat all necessary information from one coverage area to the next. This unit is considered to be Broad-
cast Relay Point unit and must have Broadcast Relay Point parameter enabled (see 5.5.2.2). By default, a
unit is not considered a Broadcast Relay Point.
5.5.2.1
Repeater Mode: Keeping your network in Sync
(Exclusive to the full-featured HiPR-900 version)
In a network topology with more than one coverage area, units that are not directly reachable by the mas-
ter unit have to be synchronized through Repeater units. See example of a network topology with two RF
coverage areas (Figure 11). Refer to section 6.7.2 for parameter setting. All units in the extended network
must operate with the same network system ID. Site the repeater so it can easily hear a master and the
distant unit site using the standard RF link budget rules.
RF Coverage 1
5.5.2.2
Broadcast Relay Point: Relaying information to distant units
Units forming the backbone between the coverage areas are called Broadcast Relay Point units. These
units will perform the necessary repeating of information from one coverage area to the next. In the ex-
ample in Figure 12, Master and Remote #1 cannot reach directly Remote #2. They must pass by Repeater
unit to get to Remote #2. The backbone between the two coverage areas will consist of the Repeater unit,
which must be declared a Broadcast Relay Point unit. The backbone is represented by the grayed out
section.
001-5099-000
Repeater
Master
Remote #1
Figure 11 - Two RF Coverage Areas
Repeater
Master
Relay Point
Remote #1
Figure 12 - Simple backbone
16
RF Coverage 2
Remote #2
Remote #2
HiPR-900 User Manual
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