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Session 12 – Contents
• Types of Wireless Networks
— Wireless Metropolitan Area Networks (WMAN) - WiMax
— Wireless Local Area Networks (WLAN) / Wi-Fi
— Wireless Personal Area Network (WPAN)
– Bluetooth
— Low-Rate Wireless Personal Area Network (LR-WPAN)
– Zigbee
Wireless WIMAX Wi-Fi Bluetooth
M. Mogollon – 2
The Wireless Landscape
Low-Rate Wireless Personal Area
Network (LR-WPAN) Wireless Wide Area Network
• General-purpose, inexpensive, (WWAN)
self-organizing mesh network. • Metro/Geographical area Wireless Personal Area Network
• • “Always On” Services (WPLAN)
Low data rates and low power • • Small form factor, low-cost,
consumption; a year or two Ubiquitous public connectivity
with a single alkaline battery. with private virtual networks short range, low power, radio
technology.
• Developed to link portable
devices without cables.
Vehicle • Non-licensed spectrum
e s C
d u D
i y
s p t M 3 C Wireless Local Area Nework
i
t m Walk l X D
i
u a b A R M 4G (WLAN), and
O C o 2 T A Wireless Metropolitan Area
M 0 0 2 Network (WMAN),
f
Fixed o 0 0 • Public or Private Site or Campus
0
l 1 0 •
e X Enterprise.
v
e R ( 8 • Non-licensed spectrum
L T M 0 ( W
s Walk I 2 M I
n u
i M . I M
h p O 1 M
t m 1 O A
i
W a Fixed/ Zigbee Bluetooth ) n ) X
C LAN
Desktop
0.1 0.25 2 54 78 200 1000 Mbps
Wireless WIMAX Wi-Fi Bluetooth
M. Mogollon – 3
Wireless Networks
Network Standard Range Data Rate
WMAN (Wireless Metropolitan Area IEEE 802.16I Approximately 30 miles 78 Mbps
Network) - WIMAX radius
WLAN (Wireless Local Area EEE 802.11 Approximately 300 feet 54 Mbps
Network) – WiFi radius
WPAN (Wireless Personnal Area IEEE 802.15 Approximately 30 feet 1, 2, or 3
Network) – Bluetooth radius Mbps
LR-WPAN (Low-Rate Wireless IEEE 802.15.4 Approximately 150 feet 250 Kbps
Personal Area Networks) – Zigbee radius
Wireless WIMAX Wi-Fi Bluetooth
M. Mogollon – 4
WIMAX
• WIMAX is very similar to a Wi-Fi but it operates at higher speeds, over greater
distances, and for a greater number of users.
• From the point of view of the infrastructure, a WiMAX network is similar to a cellular
network.
— A based station covers a very large area and can simultaneously operate as a subscriber station
and as a base station in a full mesh network using a line-of-sight link.
— A subscriber station, which could be a small WIMAX receiver box, or a mobile station.
• WIMAX operates in two primary bands, the 10-66 GHz band used where line-of sight
is necessary, and the licensed and un-licensed frequencies of 2 – 11 GHz for those
physical environments where line-of-sight is not necessary.
• WIMAX also supports subscriber stations moving at vehicular speeds.
— The spectrum at 2.5 GHz and below (2.5 GHz, 1.5GHz, 700MHz, etc.) is used because it has
better characteristics for full mobility deployment.
• WIMAX throughput is around 38 Mbit/sec when using orthogonal frequency division
multiplexing (OFDM), and 78 Mbit/sec when OFDM is combined with multiple-input
multiple-output (MIMO) antenna processing technology.
• WiMAX expands the availability of broadband service to residences, businesses and
other locations with a high cost of wire deployment.
— Low-density rural locations in developed countries
— Emerging markets where user connectivity is sporadic.
Wireless WIMAX Wi-Fi Bluetooth
M. Mogollon – 5
WIMAX Network
Subscriber
Station
Subscriber
Station
Line of sight, 10 – 66
GHz band, 38 to 78
Mbit/sec
Fiber
Base Optics Base
Station 1 Station 2 Subscriber
Subscriber Station
Station
Carrier
Base Station 1 is acting
as client to Base Station 2
Wireless WIMAX Wi-Fi Bluetooth
M. Mogollon – 6
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