User's Manual

COMTRAC RADIO
USER MAUAL
Business Entity Identifier
Business Identifier
DTC
Revision
9950-15900
3CU 04036 0026 PCZZA
108
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12. DEPLOYMENT CONSIDERATIONS
In the context of CBTC deployment, careful considerations for bandwidth usage must be
taken into account for traffic passing over the wireless interface. Quality of Service (QoS)
is a mechanism to help prioritize CBTC traffic verses diagnostic and other types of
traffic, is implemented and configurable. Refer to the QoS section in [1] for further
details.
EIRP limits pertaining to the region where installed must not be exceeded. The use of a
spreadsheet is recommended to ensure compliance to this limit, as well to ensure the
RF link is balanced. Recommend to calculate the WRU’s power setting first, as this is
typically what limits the power level setting for the system. See details in the following
section for calculating the RF transmit power setting.
Consecutive WRUs should have a different hop sequence in order to reduce co-channel
interference. Refer to notes in the Wireless Parameter section in [1] for details.
The ComTrac Radio contains a network identifier, and is the same for all radios
deployed in the region. Both the client and access points are to have the same ESSID.
Refer to the Wireless Parameter section in [1] for configuration.
The same also applies to the wireless security type and key parameters.