In rural
environments, it is likely to be located on a communication tower. Each base station
is connected by means of a backhaul connection to a wired infrastructure. Each base
station may also consist of additional networking equipment connecting the base station
to the wired network. The base stations also consist of WiMAX base-station equipment
including base-station antennas. In a typical deployment scenario, the antennas
consist of multiple elements (or multi-sectored antennas), with each element covering
a geographical region. For example, it may consist of six sectors, each sector covering
60 degrees of angle.
Each subscriber is assigned a subscriber station (SS). The SS may be a simple device
with an omnidirectional antenna located inside the building of the subscriber. It may
also be a device with a directional antenna installed on the roof of the subscriber building
in the line-of-sight of the base station. In either case, the SS would be connected to
the WAN interface of the subscriber??™s network.
This deployment scenario most likely represents most of the applications of WiMAX
discussed previously. However, the complexity and configuration of base stations and
subscriber stations are dictated by the type of services being supported.
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