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pre-lecture notes 1-6

pre-lecture notes 1-6 - Comparisons of some other wireless...

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Comparisons of some other wireless standards GSM/GPRS WCDMA CDMA2000 1x IEEE 802.16d Channel Bandwidth 200 KHz 5 MHz 1.25 MHz -20 MHz FDD/TDD FDD FDD/TDD FDD FDD/TDD Peak Bit-rate DL 160 kbps 2 Mbps 640 kbps -75 Mbps Peak Bit-rate UL 160 kbps 2 Mbps 450 kbps -75 Mbps Standards compliant 3GPP 3GPP 3GPP IEEE Some Aspects of 802.11 (WiFi) and 802.16 (WiMAX) MAC -802.11: similar to Ethernet. -802.16: Dynamic TDMA-based MAC with on-demand bandwidth allocation. Flexible QoS: CBR, rt-VBR, nrt-VBR, BE. OFDM -802.11a: 64FFTs -802.16d: 256 FFTs Spectrum -802.11: limited channels in Un-licensed spectrum. -802.16: multiple channels in licensed & Un-licensed spectrum. Some different flavors of WiMAX 802.16a 802.16REVd 802.16e Fixed Outdoor Fixed Outdoor/Indoor Limited Mobility Applications: -T1 service for enterprises -Backhaul for Hotspots -Limited residential Broadband access Applications: -Indoor Broadband access for residential users (High speed Internet, VoIP, …) Applications: -“Portable” Broadband access for consumers.
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