wifi - Wireless Local Area Networks Outline 1. Rates and...

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1 SYSC-5403 WLAN 1 © Copyright Roshdy H. M. Hafez 1990-2007 Wireless Local Area Networks Outline 1. Rates and Spectral Allocation 2. The IEEE802.11 Family (WIFI) ¾ Theory & Deployment ¾ Extensions SYSC-5403 WLAN 2 © Copyright Roshdy H. M. Hafez 1990-2007 Wireless Standards 10 kbps 100 kbps 1 Mbps 10 Mbps 100 Mbps 1Gbps WLAN Fixed Wireless Access 3G 2.5 G 2 G MSAT Direct to Home Satellite Broadband Wideband Narrow V o ic e L w R a t D i d C n f r c H g h S p I B s in O m u l PERSONAL Wireless HSPA 1X-DO WiMax LTE
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2 SYSC-5403 WLAN 3 © Copyright Roshdy H. M. Hafez 1990-2007 Data Rates & Spectrum Allocation 60 GHz 1 23 56 1 01 1 602.16e 802.16 802.11a 802.11b,g 3G: HSPA/1X-DO 3G: WCDMA/CDMA2000 2.5G: GPRS/1X 2G: GSM/CDMA/NA-TDMA 802.16a 134 Mbps 54 Mbps 14.4/2.4 Mbps 2 Mbps 0.0144 Mbps 0.144 Mbps 54 Mbps 30 Mbps 70 Mbps 4G: LTE Up to 300 Mbps Mbps SYSC-5403 WLAN 4 © Copyright Roshdy H. M. Hafez 1990-2007 WiFi & WiMax 802.16 802.16a,e,m 802.11a 802.11b,g 60 GHz 11 GHz 10 GHz 5 GHz 2.4 GHz 134 Mbps 300 Mbps 54 Mbps 54 Mbps
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3 SYSC-5403 WLAN 5 © Copyright Roshdy H. M. Hafez 1990-2007 The Wireless Bands 300kHz 3MHz 30MHz 300MHz 3GHz 30GHz 300GHz MF HF VHF UHF SHF EHF AM/FM/TV Broadcast Cellular/PCS & 3G Unlicensed Bands Fixed Wireless SYSC-5403 WLAN 6 © Copyright Roshdy H. M. Hafez 1990-2007 The WiFi Bands (unlicensed) Frequency, GHz Industrial Scientific & Medical Band (ISM) 5.15 5.25 5.35 5.725 5.825 New Allocation Unlicensed National Information Infrastructure (UNII) 2.4 2.483 GHz
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4 SYSC-5403 WLAN 7 © Copyright Roshdy H. M. Hafez 1990-2007 Definition of WiFi z Wi-Fi is an industrial forum dedicated to promote and certify interoperability of products based on the IEEE802.11 family of standards. z Large industrial membership. . ( more than 200 companies) z Thousands of products had been certified SYSC-5403 WLAN 8 © Copyright Roshdy H. M. Hafez 1990-2007 WiFi Evolution 4 36 32 28 24 20 16 12 8 40 44 Mbps 0 48 52 54 DSSS OFDM 802.11 b 802.11 g 802.11 a First 2 11 22 54 48 36 24 12 6 11 5.5 5.5 2 1 1 OFDM/ DSSS 33 54 2.4GHz 5GHz 802.11 n OFDM/ MIMO 300
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5 SYSC-5403 WLAN 9 © Copyright Roshdy H. M. Hafez 1990-2007 Standard Deployment Configuration Internet Wired 802.3 Server Router Portal AP AP AP Wireless 802.11 SYSC-5403 WLAN 10 © Copyright Roshdy H. M. Hafez 1990-2007 WiFi Modes Basic Service Set BSS Ad-Hoc Access Point Independent BSS Infrastructure BSS
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6 SYSC-5403 WLAN 11 © Copyright Roshdy H. M. Hafez 1990-2007 Basic Service Set ± Single cell ±
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wifi - Wireless Local Area Networks Outline 1. Rates and...

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