System Description

Chapter 1 - GENERAL OVERVIEW
MCIL-WIPLL-SDN_R1_40 Marconi Communications Ltd. 1-7 of 1-12
A BSR can maintain a 3 Mbit air link with customers in its sector (net throughput of
2.4 Mb/s). A single base station has a capacity of up to 72 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.
The BSR can transmit and receive through a 60 degree sector. To cover a full 360
degree sweep, requires six BSRs at the base station which will comprise six sectors
each covered by a BSR.
= Base Station Radio (BSR)
60 sector
o
Area covered by
the base station
Figure 1-5: Base Station Covering 360°