Wireless Broadband Technologies: How
b. How WiMAX works
1. A WiMAX Mobile station (MS) could be a Wireless USB
modem, laptop with WiMAX capability, an MRT Mobile Radio
Transmitter for your vehicle, and of course a WiMAX subscriber
unit for home or office.
WiMAX subscriber units can either be indoor or outdoor
depending on the distance to the nearest WiMAX base station
tower, or if there are obstructions within the subscriber's
service area. These WiMAX access point devices are what
is WiMAX version of a Cable Modem Wireless Router or DSL
Modem Wireless Router depending on what you're used to.
When needed (SU-O) subscriber unit outdoor antennas can
be mounted and connected by cable to (SU-I) subscriber unit
indoor devices to providing stronger signals inside the
customer location when tall buildings or trees restrict
signals from the local service towers.
2. How WiMAX works and performs as your network packets
enter a WiMAX access point really depends on whether you're
in a metropolitan area where fixed base station towers are
located or entering on Mobile base station towers, which
handle subscribers connecting in rural communities, and
on upgraded mobile towers interweaved through city service
The Fixed towers which are connected with home or office
subscriber units, such as a WiMAX ISP provided indoor or
outdoor subscriber unit operate on high power output transmissions
providing 3.5GHz signals out to distances of 25 miles when
passing through Fixed towers arranged in cells forming a
The Mobile towers accommodate smaller form factor CPE
devices such as laptops with WiMAX wireless mini cards,
cellular phones, and mobile hotspot devices, and are basically
upgraded mobile phone communication towers with added support
for fast connection relay between mobile towers as customers
are traveling through service areas.
Mobile towers operate entirely different then fixed towers
due to handheld devices being limited on battery and processing
power. If you're unsure which towers you're connecting to,
just look at the specifications of your WiMAX CPE device.
802.16d will connect with fixed towers, and 802.16e equipment
connects and operates on Mobile towers.