Fiber Extension: Commercial Broadband Service
In many of the urban commercial environments of developed countries such as the
U.S., several office towers are connected to broadband infrastructure like fiber-optics
networks. Tenants of such buildings can enjoy access to broadband services such as
multi-T1/E1 or Ethernet services. However, even in such urban commercial environments,
less than only 10 percent of the buildings fall under this category. Tenants of the
remaining 90 percent of the buildings are left without access to fiber and are limited to
traditional services such as T1/E1.
WiMAX network can be used to extend the reach of fiber beyond where the fiber
terminates, extending the plethora of services that can be made available to tenants of
other buildings. This can be accomplished in at least three different ways. In all these
method, a BS would be installed on the rooftop of the building or tower with access to
the fiber infrastructure. In the first case, the single carrier SC-PHY technology could
be used to extend services from the BS to the building in Line-of-Sight (LOS) of the BS,
WiMAX 487
from where it would be distributed to the tenants of the building, using the building??™s
internal networking infrastructure, as illustrated in Figure 15.
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