User Manual

RPC/RP Manual RP Installation
19June2000 WLL-RPC/RP-IN/UM-1.0
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Figure 3-2: Radio Port Block Diagram
3.1.1 Traffic Handling
PHS applies Time Division Multiplex Access (TDMA) and Time Division
Duplex (TDD) techniques. Each individual radio link between the RP and the
FSU/PS is assigned 1 time slot for a control channel (C-ch) and 3 slots for traffic
channels (T-chs).
In the case of a single RP, there are 4 time slots installed for radio links. One slot
is the control channel for signaling and the other three are the traffic channels.
The number of accommodated subscribers in that RP covering the zone calculated
according to the erlang theory is as follows:
• Erlang per zone (3 T-chs, GOS=5%) = 0.899 erlang
• Subscribers (FSUs or PSs) (0.899÷.08) = 11 subscribers
Group Control maximizes the number of channels available for traffic by
allowing one control channel to control up to 8 RPs (up to 31 traffic channels),
which is an efficient application for high traffic areas. One master RP can control
a maximum of 7 RPs in the same area. The master RP has one control channel,
and all the other channels are assigned for traffic, leaving 31 channels open for
traffic. Figure 3-3 represents the group control configuration with 4 RPs in the
group.