2. Topology of a Wireless Network
• Point-to-point
– Usually very high speed
and high capacity
– Requires a clear line of
sight to tower
– Backbone, or backhaul
connectivity
– Corporate/Business
Class service 2
3. Topology of a Wireless Network
• Point-to-multipoint
– Similar technology to
point-to-point network
3
4. Topology of a Wireless Network
• Mesh Network
– Distributed gateway
devices
– Self healing network
– Uses multiple radios
in tight formation
– “Micro cell” concept
– Relatively easy to
deploy
4
5. WiFi vs. WiMAX
IEEE 802.11 IEEE 802.16a
Max Speed 54Mbps (a&g) 10-100Mbps
Range 100m 40 km
Coverage Indoor Outdoor
Users Hundred Thousand
Service Level None Yes
6. 3G vs. WiFi
3G WiFi
Standard WCDMA, IEEE 802.11
CDMA2000
Max Speed 2Mbps 54Mbps
Operations Cell Phone Individual/ISP
License Yes No
Coverage Area Several km ~100m
Advantages Range, Mobility Speed, Cheap
Disadvantages Slow,Expensive Short Range
7. 3G vs. WiMAX
3G WiMAX
Standard WCDMA, IEEE 802.16
CDMA2000
Max Speed 2Mbps 10-100Mbps
Operations Cell Phone Individual/ISP
License Yes Yes/No
Coverage Area Several km Several km
Advantages Range, Mobility 120km/h,
LongRange
Disadvantages Slow,Expensive Interference
