Midterm 30% Final 40% LAB 15% Assignment 15%

Text Book – Designing and Deploying 802.11n Wireless Networks Jim Geier (ciscopress)

W.lilakiatsakun

Introduction to Wireless Networks Wireless LAN Markets and Applications Benefits of Wireless Networks Wireless Network Technologies Other Wireless Network Technologies

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

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

Healthcare

Video Surveillance

What else have you thought of wireless applications ?

Mobility Can move to anywhere

Solve some wire problems Connector problems Cable Erosion

Install in Difficult-to-Wire Access Remote Area Dangerous area

Reduced Installation Time Long-term Cost Saving Productivity Gain

Performance Low Bandwidth High Error Rate

Security Broadcast signal

Limited Power Consumption Operating on battery

IEEE 802.11 (WIFI)

802.11a OFDM (Orthogonal Frequency Division

Multiplexing) 5GHz Band 54 Mbps

802.11b DSSS (Direct Sequence Spread Spectrum) 2.4GHz Band 11 Mbps

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)

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

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

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

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

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

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

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

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

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

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 could provide data rates from 56 kbit/s up to 115 kbit/s.

CDMA2000 networks similarly evolved through the introduction of 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.

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.

 It can also be used for WAP, SMS & MMS services, as well as Internet access.

3G the UMTS system, first offered in 2001, standardized

by 3GPP, used primarily in Europe, Japan, China (however with a different radio interface) and other regions predominated by GSM 2Gsystem infrastructure. The cell phones are typically UMTS and GSM hybrids. Several radio interfaces are offered, sharing the same infrastructure: The original and most widespread radio interface is

called W-CDMA. The TD-SCDMA radio interface was commercialized in

2009 and is only offered in China. The latest UMTS release, HSPA+, can provide peak data

rates up to 56 Mbit/s in the downlink in theory (28 Mbit/s in existing services) and 22 Mbit/s in the uplink.

The CDMA2000 system, first offered in 2002, standardized by 3GPP2, used especially in North America and South Korea, sharing infrastructure with the IS-95 2G standard.

The cell phones are typically CDMA2000 and IS-95 hybrids. The latest release EVDO Rev B offers peak rates of 14.7 Mbit/s downstream.

4G Two 4G candidate systems are

commercially deployed: the Mobile WiMAX standard (first used in South Korea in 2006), and the first-release Long Term Evolution (LTE) standard (in Oslo, Norway and Stockholm, Sweden since 2009).

LTE Advanced (Long Term Evolution) Release 10 of LTE is expected to achieve

the IMT Advanced speeds. Release 8 currently supports up to 300 Mbit/s of download speeds which is still short of the IMT-Advanced standards.(1 Gbps)

The Mobile WiMAX (IEEE 802.16e-2005) mobile wireless broadband access (MWBA) standard (also known as WiBro in South Korea) is sometimes branded 4G, and offers peak data rates of 128 Mbit/s downlink and 56 Mbit/s uplink over 20 MHz wide channels.