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Wireless sensor networks looking to Zigbee Alliance

Wireless sensor networks looking to Zigbee Alliance. By Bryon Gloden, Murat Senel, and Waseem Sheikh. What is a sensor?. Small, autonomous computers, containing: sensors that allow data acquisition “computer’’ that allows data processing radio that allows data communication

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Wireless sensor networks looking to Zigbee Alliance

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  1. Wireless sensor networks looking to Zigbee Alliance By Bryon Gloden, Murat Senel, and Waseem Sheikh

  2. What is a sensor? • Small, autonomous computers, containing: • sensors that allow data acquisition • “computer’’ that allows data processing • radio that allows data communication • Battery operated • Ability to self-organize into ad hoc networks • Programmable, running TinyOS • http://www.tinyos.net • Example: PicoRadio, 2 AA bateries, 40 Kbps RFM TR 100, Detachable sensor boards: temperature, photo, microphone, • Applications include civil and military

  3. What is ZigBee? • ZigBee • Technology that addresses the market needs for cost-effective wireless networking solutions based on IEEE 802.15.4 standard • IEEE 802.15.4: • Wireless MAC and PHY specifications for low-rate wireless personal area networks (LR-WPANs) • Ultra-low complexity, ultra-low cost, ultra-low power consumption, and low data rate (20-250 kb/s) wireless connectivity among inexpensive devices • Lower power, lower cost than other WPANs (e.g. Bluetooth) • ZigBee Alliance • Non-profit industry consortium defining a global specification for reliable, cost-effective, low power wireless applications based on the IEEE 802.15.4 standard. • Six promoters (Honeywell, Invensys, Mitsubishi, Motorola, Philips, and Samsung) and more than 80 participants

  4. Article Summary • Planned certification program to assure sensors meet specifications, interoperability and manageability. • RTM fourth quarter of 2004. • Low cost of sensors will likely make them a more favorable option over other WPAN technologies.

  5. Article Strengths and weaknesses • Strong Points • Interoperation compatibility • Gives practical applications of sensor networks • Advantages of Zigbee over Wi-Fi and Bluetooth • Real-time data analysis • Advantages of Zigbee tags over passive RFID • Scalability issues • Weak Points • Lack of specifications, such as, modulation scheme, power level, medium access • Security issues • Cost of Zigbee chipset • Passive/active RFIDs

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