introduction wireless network
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Introduction Wireless Network. Politeknik Telkom 2008. comprehension. Wireless Communication System : Radio frequency Information transmission (video, voice, picture, data) Limited by bandwidth Interference. Anvantages of wireless. Mobility Simple setup Low cost Scalability. - PowerPoint PPT PresentationTRANSCRIPT
Introduction Wireless Network
Politeknik Telkom 2008
comprehension
Wireless Communication System :Radio frequencyInformation transmission (video, voice,
picture, data)Limited by bandwidthInterference
Anvantages of wireless
Mobility Simple setupLow costScalability
Wireless Communication
Fixed services:BluetoothWiFiWIMAXRFID
Mobile services:Limited Mobility (Flexi)Cellular (GSM, CDMA, 3G)
Type of Wireless Technology
Degree of mobility
Sta
ndin
gW
alki
ngD
rivin
g
User data rate10 Mbps
IEEE802.16a,d
1 100
HSDPA
IEEE802.16e
WLAN(IEEE 802.11x)
GSMGPRS
DECT
EDGE
FlashOFDM (802.20)
Systems beyond 3G >2010
0.1
BlueTooth
UMTS
CDMA
EV-DOEV-DV
UMTS
IEEE
IEEE (Institute of Electrical and Electronic Engineers)
IEEE :
- discussion
- research
- development
for network technology
standart IEEE
IEEE 802.8 Fiber Optic LAN & MAN (standart FDDI)
IEEE 802.10 LAN/MAN security (VPN)IEEE 802.11Wireless LAN (WiFi)IEEE 802.15Wireless PAN (Personal
Area Network) bluetoothIEEE 802.16Broadband Wireless Access
(WiMax)
Content vs Bandwidth
Trade off Wireless Communication
Maximum bit rateMinimum errorMinimum powerMinimum bandwidthMaximum system utilityMinimum complexityMinimum cost
Wireless Performance
Range (coverage)Power (daya yang digunakan)MobilityBandwidthData rate
Multiple Access Technology
FDMATDMACDMA
FDMA (FREQUENCY DIVISION MULTIPLE ACCESS)
advantages :simpleWithout network timing
Kekurangan : Intermodulation noiseLow spectrum efficiency
FDMA
TDMA
Kelebihan :High spectrum efficiencyWithout power control
Kekurangan :Need synchronization
TDMA
CDMA
Kelebihan :High spectrum efficiencyHigh capacitysecure
kekurangan :Need power control
CDMA
Perkembangan teknologi wireless