Transcript IEEE 802.20 Standard
School of Electrical and Computer Engineering University of Tehran Class Presentation for the Course: “Custom Implementation of DSP Systems”
Mobile Broadband Wireless Access (MBWA) IEEE 802.20 Standard
By:
Reza Nakhjavani
Instructor:
Prof. S. M. Fakhraei May 2010 All Materials are Copyrights of Their Respective Authors as Listed in References
Overview
Introduction 802.16
802.20
802.20 PHY Layer 802.16e vs. 802.20
Intel® WiMAX Connection 2250 Summary References
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Introduction
[1] Importance of accessing data and information in today’s life.
Network protocols such as Wi-Fi (802.11) and WiMAX (802.16) have been developed for such applications. Need for these information services under fully mobile conditions and in vehicular speeds has increased.
IEEE 802.20 standard(Mobile-Fi), has been developed for mobile applications in speeds of up to 250 km/h.
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Introduction
The Wireless Space [3]
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[2]
802.16: Fixed Broadband Wireless Access: Wi-Max
Frequencies from 10 to 66 GHz Time Division Duplex and Frequency Division Duplex configurations are supported Bandwidth 75 Mbps of bandwidth for 2 to 3 miles.
Uplink : TDMA , DAMA Downlink: TDM
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[6]
802.16: Fixed Broadband Wireless Access: Wi-Max
Architecture :
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802.16: Fixed Broadband Wireless Access: Wi-Max
[2] IEEE 802.16e
Providing true mobile broadband connectivity.
Designed to support bands in the range 2 – 6GHz.
Uses Scalable OFDMA to carry data Channel bandwidths :1.25 MHz~20MHz, with up to 2048 sub-carriers Adaptive modulation Good Signal : 64 QAM Intermediate Signal: 16 QAM & QPSK Poor Signal : BPSK Good NLOS (Non-line-of-sight) characteristics
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[7]
802.20
Development needed to 802.16 protocol.
Aims basically at throughput than mobility.
802.20 is developed to cover the mobility part of the 802.16.
allow the creation of low-cost, always-on, and truly mobile broadband wireless networks.
Bandwidths of 5, 10, and 20 MHz Peak data rates of 80 Mbit/s.
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[2]
802.20 PHY Layer
PHY layer specs duplex modes : Time Division Duplex (TDD) , Frequency Division Duplex (FDD) multi-carrier modes: On , Off Modulation : OFDM with QPSK, 8PSK, 16QAM, and 64QAM
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[4]
802.20 PHY Layer
Transmitter
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[1]
802.20 PHY Layer
Transmitter OFDM Numerology
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802.16e vs. 802.20
[2]
Parameter Standard
Frequency Band Channel Bandwidth Transmission Rate Mobility Mobile Speed MAC / PHY
802.16e
802.20
2-6 GHz > 5 MHz 10 – 50 Mbps High-data-rate fixed wireless user with adjunct mobility service 60 kmph 3.5 GHz < 20 MHz > 16 Mbps Fully mobile, high throughput data user Extensions to 802.16a MAC and PHY up to 250 kmph New PHY and MAC optimized for packet data and adaptive antennas
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Intel® WiMAX Connection 2250
The Intel WiMAX Connection 2250 is compliant with both IEEE 802.16-2004 and IEEE 802.16e-2005 specifications.
[8]
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Intel® WiMAX Connection 2250 (Specs)
OFDMA 512/1024 PHY mode Bandwidths: up to 10 MHz Support for TDD and H/FDD duplexing modes Concatenated Reed-Solomon and Convolutional Adaptive modulation (BPSK, QPSK, QAM16, QAM64) [8] Highly optimized DSP engine with multiple parallel ALUs for concurrent complex operations per cycle, which enables efficient OFDM/OFDMA processing
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References
1- A. Jalili, S. M. Fakhraie, and S. Nader-Esfahani, “Performance Evaluation of IEEE 802.20 PHY Layer,” (ICCET 2009), Jan. 2009.
2 http://www.ucs.louisiana.edu/~vrb5959/final.pdf
3 https://www.ntt-review.jp/archive/ntttechnical.php?contents=ntr200805sf3.html
4- WALKER BOLTON, et al,” IEEE 802.20:MOBILE BROADBAND WIRELESS ACCESS”, IEEE Wireless Communications, February 2007 5- Local and Metropolitan Area Networks – Standard Air Interface for Mobile Broadband Wireless Access Systems Supporting Vehicular Mobility – Physical and Media Access Control Layer Specification, IEEE Standard 802.20, Aug. 2008.
6 http://www.mvt.co.th/images/upload/big/661.jpg
7 http://en.wikipedia.org/wiki/IEEE_802.20
8 http://download.intel.com/network/connectivity/products/wireless
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Questions?
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Thank you
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