User Manual

WipLL System Description
1-6 of 1-12
Issue 03
4Mbit - Draft 05
1QDF10134AAP-SYD-FCC
48 VDC
10 base-T
Wide Area Network
Connection
Power
Supply
BSDU
BSR
BSR
BSR
BSR
BSR
BSR
100 base-T
DS1 DS3 ATM Other
Management
Figure 1-4: Base Station Units
A BSR can maintain a 4 Mbit air link with customers in its sector (net throughput of
3.2 Mb/s). A single base station has a capacity of up to 96 Mb/s and can support up
to 3024 customer sites. The area covered by a single base station is called a cell and
can extend to a radius of up to 25 km in ideal locations, about 6 km in suburban
locations and about 2 km in urban locations dependent on locally permitted RF
transmission power.
1.1.3. Coverage
Each base station provides a wireless link to all subscribers in the base station's area
or domain. For full coverage several base stations can be set up over an extended
area.
WipLL works in accordance with the operator's backbone and uses the backbone to
connect between base stations, the central management station, and other resources
on the network. WipLL assumes a network backbone that uses IP. The area covered
by a base station is divided into sectors. Each sector is built around a Base Station
Radio (BSR) unit which is the central coordinator of the sector.