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Introduction Wireless Network

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.

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Introduction Wireless Network

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  1. Introduction Wireless Network Politeknik Telkom 2008

  2. comprehension Wireless Communication System : • Radio frequency • Information transmission (video, voice, picture, data) • Limited by bandwidth • Interference

  3. Anvantages of wireless • Mobility • Simple setup • Low cost • Scalability

  4. Wireless Communication • Fixed services: • Bluetooth • WiFi • WIMAX • RFID • Mobile services: • Limited Mobility (Flexi) • Cellular (GSM, CDMA, 3G)

  5. Degree of mobility UMTS Driving CDMA Systems beyond 3G >2010 GSMGPRS UMTS Walking HSDPA EV-DO EV-DV EDGE IEEE802.16e FlashOFDM (802.20) Standing DECT WLAN(IEEE 802.11x) IEEE802.16a,d BlueTooth 0.1 1 10 100 Mbps User data rate Type of Wireless Technology

  6. IEEE • IEEE (Institute of Electrical and Electronic Engineers) • IEEE : - discussion - research - development for network technology

  7. 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)  bluetooth • IEEE 802.16Broadband Wireless Access (WiMax)

  8. Content vs Bandwidth

  9. Trade off Wireless Communication • Maximum bit rate • Minimum error • Minimum power • Minimum bandwidth • Maximum system utility • Minimum complexity • Minimum cost

  10. Wireless Performance • Range (coverage) • Power (daya yang digunakan) • Mobility • Bandwidth • Data rate

  11. Multiple Access Technology • FDMA • TDMA • CDMA

  12. FDMA (FREQUENCY DIVISION MULTIPLE ACCESS) • advantages : • simple • Without network timing • Kekurangan : • Intermodulation noise • Low spectrum efficiency

  13. FDMA

  14. TDMA • Kelebihan : • High spectrum efficiency • Without power control • Kekurangan : • Need synchronization

  15. TDMA

  16. CDMA • Kelebihan : • High spectrum efficiency • High capacity • secure • kekurangan : • Need power control

  17. CDMA

  18. Perkembangan teknologi wireless

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