1.  Midterm 30%  Final 40%  LAB 15%  Assignment 15%  Text Book – Designing and Deploying 802.11n Wireless Networks  Jim Geier (ciscopress)

2. W.lilakiatsakun

3.  Introduction to Wireless Networks  Wireless LAN Markets and Applications  Benefits of Wireless Networks  Wireless Network Technologies  Other Wireless Network Technologies

4.  Retail – connection between devices (printer /barcode) and computer system

5.  Warehousing – Wireless Barcode system to support CDC (Central Distributing Center)

6.  Healthcare

7.  Video Surveillance

8. What else have you thought of wireless applications ?

9.  Mobility  Can move to anywhere  Solve some wire problems  Connector problems  Cable Erosion  Install in Difficult-to-Wire Access  Remote Area  Dangerous area

10.  Reduced Installation Time  Long-term Cost Saving  Productivity Gain

11.  Performance  Low Bandwidth  High Error Rate  Security  Broadcast signal  Limited Power Consumption  Operating on battery

12.  IEEE 802.11 (WIFI)

13.  802.11a  OFDM (Orthogonal Frequency Division Multiplexing)  5GHz Band  54 Mbps  802.11b  DSSS (Direct Sequence Spread Spectrum)  2.4GHz Band  11 Mbps

14.  802.11g  OFDM (Orthogonal Frequency Division Multiplexing)  Backward Compatible with 802.11b  2.4GHz Band  54 Mbps for 802.11g  11 Mbps for 802.11b (RTS/CTS used for protection mechanism when 802.11b client try to connect to 802.11b/g access point)

15.  802.11n  MIMO (Multiple Input Multiple Output)  Channel bonding and Frame aggregation  Support 2.4GHz and 5GHz  Backward compatible with 802.11g and 802.11a

16.  Wi-Fi Alliance is an international, non-profit organization focusing on the manufacturing, marketing, and interoperability of 802.11 WLAN products

17.  Wi-Fi alliance goals  1 Promote WIFI-certification worldwide by encouraging manufacturers to follow standardized 802.11 processes in the development WLAN products  2 Market Wi-Fi certified product to customers in the home, office and enterprise market

18.  IEEE 802.16 (WiMAX)  High Performance – offer data rate in the megabits per second  Medium to long-range operation – offer Kilo meters in range  Medium power – similar power requirement as Wi- Fi  High to very high cost – Hardwares is more expensive than Wi-Fi

19.  WiMAX Standard  802.16d – Only fixed wireless  802.16e – Fixed and mobile wireless  802.16m – under development (speed up to 1Gbps)  WiBro – Based on 802.16e and has functionality defined by Mobile WiMAX  WiMAX Frequency  Licensed – 2.5GHz and 3.5GHz  Unlicensed – 5.8GHz

21.  802.15 (Bluetooth)  Medium performance – provide 1Mbps (Ver. 1.2) and up to 3Mbps (Ver. 2.0 +EDR (Enhanced Data Rate))  Short to Medium Range – Class3 radios offer 3 feet range, class2 radios(most common) provide 30 feet range and class 1 radios (industrial use) provide 300 feet range  Low power – class 2 devices operate at 2.5mW  Low cost – 1-2 $ per chip

22.  802.15 (Bluetooth)  2.4GHz  FHSS (Frequency Hopping Spread Sprectrum)  802.15.1 (Initial)/ 802.15.3 (draft –speed up to 20 Mbps)  Adhoc networking

23.  802.15.4 (ZigBee)  Short to Medium Range – 30 to 300 feet range  Low Power – can operate months to years  Low Cost – more cost effective than Bluetooth  Low Performance  250 kbps at 2.4GHz  40Kbps at 915MHz  20Kbps at 868 MHz

24.  Certified Wireless USB  USB Implementer Forum (USV-IF) is a non- profit corporation founded by the group of companies that developed the USB (Universal Serial Bus) specification  Wireless USB use WiMedia MB-OFDM Ultra-wideband (UWB) radio platform  Wireless USB targets 480Mbps at 3 meters /110Mbps at 10meters

25.  2.5G  The first major step in the evolution of GSM networks to 3G occurred with the introduction of General Packet Radio Service (GPRS).GPRS  GPRS could provide data rates from 56 kbit/s up to 115 kbit/s.  CDMA2000 networks similarly evolved through the introduction of 1xRTT.1xRTT  1xRTT supports bi-directional (up and downlink) peak data rates up to 153.6 kbit/s, delivering an average user data throughput of 80-100 kbit/s in commercial networks. 

26.  It can be used for services such as Wireless Application Protocol (WAP) access, Multimedia Messaging Service (MMS), and for Internet communication services such as email and World Wide Web access.Wireless Application Protocol  It can also be used for WAP, SMS & MMS services, as well as Internet access.

27.  3G – UMTS,CDMA2000  3.5 -  4G  4.5G