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IEEE 802.11n

IEEE 802.11n. MIMO. Haroun Ferhat David Grégoire. July 11, 2006. Wireless Standards. RFID (AutoID Center). IEEE 802.15.4 (Zigbee Alliance). RAN. IEEE 802.22. WAN. 3GPP (GPRS/UMTS) 3GPP2 (1X--/CDMA2000) GSMA, OMA. IEEE 802.20 IEEE 802.16e. MAN. IEEE 802.16d WiMAX.

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IEEE 802.11n

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  1. IEEE 802.11n MIMO Haroun Ferhat David Grégoire July 11, 2006

  2. Wireless Standards RFID (AutoID Center) IEEE 802.15.4 (Zigbee Alliance) RAN IEEE 802.22 WAN 3GPP (GPRS/UMTS) 3GPP2 (1X--/CDMA2000) GSMA, OMA IEEE 802.20 IEEE 802.16e MAN IEEE 802.16d WiMAX ETSI HiperMAN & HIPERACCESS LAN ETSI-BRAN HiperLAN2 IEEE 802.11 Wi-Fi Alliance PAN IEEE 802.15.3 UWB, Bluetooth Wi-Media, BTSIG, MBOA ETSI HiperPAN

  3. Growing 802.11 Standards 11u .11s, .11v, .11T,.11 r, .11p 11ma 11n 11k 11j 11i 11h 11g 11f 11e 11d 11c 11b 11a 802.11

  4. What do home users want? • Range • Reliable • High fidelity & quality A/V • Backwards compatibility with older 802.11 standards • For 3 streams in the home, with picture-in-picture, and Internet access, 100Mbps UDP level throughput is easily consumed

  5. What do ISPs need ? • Consumer satisfaction, as high as possible : users will blame the service provider • Video and high throughput (mobile) data sessions • Management capability to the devices • High rate for outdoor to indoor 150m operations

  6. 802.11 WLAN Standards

  7. Uses – Source : Wi-Fi alliance

  8. .11 n proposals • 32 proposals, 4 complete (Sept 04, Nov 04) • TGn Sync • WWISE • Motorola/Mitsubishi • Qualcom • Down select and merger (Jan 05) • TGn Sync • WWISE

  9. IEEE 802.11n basics: 2 main proposals (TGn SYNC & WWISE)

  10. channel Conventional (SISO) Wireless Systems Conventional “Single Input Single Output” (SISO) systems were favored for simplicity and low-cost but have some shortcomings: • Outage occurs if antennas fall into null • Switching between different antennas can help • Energy is wasted by sending in all directions • Can cause additional interference to others • Sensitive to interference from all directions • Output power limited by single power amplifier Bits DSP DSP Radio Radio Bits TX RX

  11. channel MIMO Wireless Systems Multiple Input Multiple Output (MIMO) systems with multiple parallel radios improve the following: • Outages reduced by using information from multiple antennas • Transmit power can be increased via multiple power amplifiers • Higher throughputs possible • Transmit and receive interference limited by some techniques Radio Radio DSP DSP Bits Bits Radio Radio TX RX

  12. MIMO • The next generation WLAN uses MIMO technology • Beamforming MIMO technology • Extends range of existing data rates by transmit and receive beamforming • Spatial-multiplexing MIMO technology • Increases data rates by transmitting parallel data streams • MIMO allows system designers to leverage Moore’s law to deliver higher performance wireless systems

  13. What’s up now ? January 19, 2006 : IEEE 802.11n Task Group approved the Joint Proposal's specification March 2006 : 802.11n Draft May 2, 2006 : Draft 1.0 rejected by sponsors The 802.11n standard is not due for final approval until July 2007

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