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Low Power Wi-Fi

Low Power Wi-Fi. Speaker : Yu-Ping Chen Advisor : Quincy Wu Date : 2010/01/17. Outline. Introduction to Wi-Fi and IEEE 802.11 Introduction to Low Power Wi-Fi Product of Low Power Wi-Fi Comparison between Wi-Fi and Zigbee Reference. Introduction to Wi-Fi.

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Low Power Wi-Fi

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  1. Low Power Wi-Fi Speaker : Yu-Ping Chen Advisor : Quincy Wu Date : 2010/01/17

  2. Outline • Introduction to Wi-Fi and IEEE 802.11 • Introduction to Low Power Wi-Fi • Product of Low Power Wi-Fi • Comparison between Wi-Fi and Zigbee • Reference

  3. Introduction to Wi-Fi • Wi-Fi technology builds on IEEE 802.11 standards. • The term Wi-Fi suggests Wireless Fidelity. • Wi-Fi is a trademark of the Wi-Fi Alliance. • Wi-Fi Alliance was established in 1999, when the name was called the Wireless Ethernet Compatibility Alliance (WECA). In 2002, officially changed its name to Wi-Fi Alliance.

  4. Introduction to Wi-Fi (cont.) • A huge installed base of over 2 billion Wi-Fi-certified devices. --Wi-Fi direct will make Wi-Fi even more pervasive by turning devices/equipment into soft AP • There are about 300 members from a vibrant standard and industry alliance. • Well-proven encryption, authentication and end-to-end network security. • Mature network management systems.

  5. Comparison with 802.11 The table refers to Wiki.

  6. Introduction to Low Power Wi-Fi • High level of integration -- shorten connections, minimize capacitances and inductances and reduce overall energy consumption. • Flexible and rapid power management -- fast-response states with reduced power consumption -- very-low-power Standby or Idle states

  7. Introduction Low Power Wi-Fi (cont.) • Transition from low-power states to a fully operational condition in a short time -- pre-arranged schedule or by external input. • Minimal current drain for connection maintenance and device management

  8. Typical Low-Power Wi-Fi Operation

  9. Low Power Wi-Fi = Standard Wi-Fi, IP • Wi-Fi sensors use IP-over-Ethernet networking environment . • Sensor nodes can be managed and configured remotely using SNMP . • Support of well proven Wi-Fi link-layer encryption and authentication and related Wi-Fi Protected Access (WPA/ WPA2).

  10. Low Power Wi-Fi = Standard Wi-Fi, IP (cont.) • A low-power Wi-Fi device can use the NAV value received to reduce power consumption during the requested interval, and avoid attempting a transmission which is likely to collide with that of another Station.

  11. Application to Low Power Wi-Fi • Healthcare  • Industrial  • Building Automation  • "Smart Grid" Utilities  • Residential  • Transportation  • Consumer Electronics Remote Control Products 

  12. Products of Low Power Wi-Fi • Broadcom BCM4326 • Broadcom BCM4328 • Atech iWEM-1000 • Redpine Signals RS9110-N-11-31 • GainSpan S1010

  13. Products of Low Power Wi-Fi (cont.) GainSpan GS1010 • Highly-integrated Wi-Fi SoC – Dual processors, SRAM, Flash, PA in 10mm * 10mm.

  14. Products of Low Power Wi-Fi (cont.) • Ultra low power consumption for years of battery life on a single AA. • Works with existing Wi-Fi AP infrastructure. • Supports TCP/IP/UDP protocol for direct internet connectivity. • Enables management, setup and configuration of device (SNMP). • Delivers Enterprise-level security and reliability

  15. Products of Low Power Wi-Fi (cont.)

  16. Products of Low Power Wi-Fi (cont.) Smart power consumption for battery powered sensors • Efficient active and standby modes • System level power management • Small footprint, real-time OS • Controlled clocking, wakeup • Single die integration

  17. Comparison between Wi-Fi and Zigbee

  18. Comparison between Wi-Fi and Zigbee (cont.)

  19. Reference • http://en.wikipedia.org/wiki/Wi-Fi • http://www.xunzhi.com/low-power-wifi.html • http://www.prlog.org/10163032-strong-market-growth-forecast-for-low-power-wifi-in-wireless-sensor-networks.html • http://www.gainspan.com/ • http://www.wtrs.net/wsntechtrends.htm • http://en.wikipedia.org/wiki/IEEE_802.11

  20. Footprint :這個術語用來描述微型元件在電腦中佔用更少的空間，以及軟體在記憶體中（無論隨機存取記憶體或唯讀記憶體）佔用更少的空間。 • Real-time 作業系統是針對 2 種主要類型的應用所研發：事件回應 (Event Response) 與閉迴路控制系統。事件回應應用，需要一定時間內針對激發所產生的回應。 • back

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