| Deployment
Scenarios |
 |
TAWA Wireless Access System can be deployed in a variety of scenarios to provide high quality voice and medium bit-rate data communication services in homes and offices. As mentioned earlier, TAWA WLL is designed to provide telephone and data communication in dense urban areas to sparse rural areas. Here, we provide five different deployment examples each serving areas with different subscriber density.
|
 |
 |
Scenario
1
|
|
Applies to situations where subscribers are scattered
around an existing Exchange in a 10 Km radius.Subscribers
are directly covered by a number of Base Stations (BS)
mounted on outdoor poles planted next to the Exchange. |
 |
|
Scenario 2
|
| Suitable
for expanding telecommunications in dense urban and
sub-urban areas where there is an already existing Access
Network.Base Stations are mounted on poles placed along
the existing copper root and connected to the available
wire.The length of the copper root should not exceed
4 Kms and the poles should be placed 200 to 400 meters
apart. |
 |
|
Scenario
3
|
|
Considered when the distance between the subscribers
and their Local Exchange exceeds the 10 Km range of
coverage of the Base Station (BS). It is also useful
to get around a large obstacle between the exchange
and the subscribers.In this case, a Relay Base Station
(RBS) is used to relay the radio signals of the BS up
to 35 Km from the starting point. |
 |
|
Scenario
4
|
| Applicable
when subscribers are located at a distance of more than
50 km away from the Exchange.In this situation, Base
Stations (BS) can be located remotely using a Base Station
Distributor (BSD). The BSD is connected to the BSC via
a point-to-point E1 fiber, or microwave radio. In
the remote location, a group of up to four BS units
can be connected to the BSD. |
|
|
Scenario 5 |
| Used for subscribers located far away from the switch - more than 25 Km and where neither line of sight is possible nor scenario 4 is applicable (no infrastructure for E1). In this case, two Relay Base Station (RBS) are used to relay the radio signals of the BS up to 60 Km from the starting point. |
 |
|
Scenario 6 |
| This scenario is applied
if it is necessary to make a connection via satellite
(VSAT), and this is used, for example, in the case of
mountainous areas where no support of transmission (Radio-relay
Systems, optical fibre, others) is available or in the
case of voice over IP (VoIP) applications; in this scenario
the addition of VoIP GateWay and a VSAT Modem is necessary. |
