introduction wireless network

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