Cambium Networks PMP 450 AP, Планирование и руководство по установке

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Chapter 3: System planning Remote AP Deployment
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Remote AP (RAP) Performance
The performance of a remote AP is identical to the AP performance in cluster. Throughputs, ranges, and
antenna coverage are identical.
As with all equipment operating in the unlicensed spectrum, Cambium strongly recommends that you
perform site surveys before you add network elements. These will indicate that spectrum is available in
the area where you want to grow. Keep in mind that:
•
non-LoS ranges heavily depend on environmental conditions.
• in most regions, not all frequencies are available.
• your deployments must be consistent with local regulatory restrictions.
Example Use Case for RF Obstructions
A remote AP can be used to provide last-mile access to a community where RF obstructions prevent
SMs from communicating with the higher-level AP in cluster. For example, you may be able to use 900
MHz for the last mile between a remote AP and the outlying SMs where these subscribers cannot form
good links to a higher-level 5 GHz AP. In this case, the ability of the 900-MHz wavelength to be effective
around foliage at short range solves the foliage penetration problem.
An example of this use case is shown in Figure 63 .
In this example, the 5 GHz AP is a PMP 450i AP in the 5.8 GHz band operating on a 20 MHz channel with
a 2.5 ms frame; the SMs are 5 GHz PMP 450 integrated SMs. The SM connected to the remote AP is a
PMP 450i SM.
The remote AP is a PMP 450i AP in the 900 MHz band, also operating in a 20 MHz channel with a 2.5 ms
frame; the SMs are 900 MHz PMP 450 connectorized SMs using the Cambium 23 dBi gain antenna.