Cambium Networks cnWave 5G Fixed, Руководство по эксплуатации и устранению неисправностей

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Troubleshooting cnWave™ 5G Fixed Platform of Products 30
Figure 21: EVM versus MCS modulation Modes (56 MHz)
l
Transmitted RACH Count – The Uplink Random Access Channel (RACH) is the uplink
channel used by the CPE to initiate a connection request to the BTS. If all is well, the BTS
must respond to enable the CPE transmission that results in generating a RACH number.
With this RACH number, there are also two other counters - Transmitted SRB and Received
SRB packets. These numbers indicate the number of BTS-CPE messages exchanged to
attach the CPE. At this point, this means that the CPE can find the BTS, and baring any
other radio issues (as shown in
Figure 21 ), the link must establish.
Mandatory parameters required for establishing a BTS-CPE link
Table 1 lists the parameters that must be configured to establish a link between a BTS and one or several
CPEs.
Table 1: Parameters required for establishing a link between a BTS and a CPE
Parameter BTS CPE Description
Operational Software Yes Yes It is recommended to have the same label for the
operational software. Example: 3.0 label for the 3.0
operation software.
Frequency Yes Yes The CPE must have the same frequency in the Radio
Scan Frequencies list as that of the BTS.
Bandwidth Yes Yes Must be the same for both BTS and CPE.
Link Symmetry Yes Yes Must be the same for both BTS and CPE.
Polarization
Yes Yes Must be the same for both BTS and CPE or can be set
to Auto Detect for the CPE In C100 UI
(recommended).
Read-only parameters required for monitoring the link
There are read-only parameters that must be monitored during troubleshooting if a link between a BTS
and a CPE cannot be established.