ZigBee Alliance Documents http www zigbee org LearnMore WhitePapers aspx ZigBee

Zigbee alliance documents http www zigbee org

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ZigBee Alliance Documents (http:/ / www. zigbee. org/ LearnMore/ WhitePapers. aspx) ZigBee RF4CE: A Quiet Revolution is Underway (December, 2012) (https:/ / docs. zigbee. org/ zigbee-docs/ dcn/ 12/ docs-12-0629-01-0mwg-zigbee-rf4ce-a-quiet-revolution-is-underway-webinar-slides. pdf) ZBOSS ZigBee Open Source Stack (http:/ / zboss. dsr-wireless. com/ ), Certified by Zigbee Alliance (http:/ / zigbee. org/ DesktopModules/ zigbeecertifiedproducts/ Documents/ 6345113396155299162UBEC_ClarIDy_08006r03ZB_CSG-ZigBee-Layer-PICS-and-Stack-Profiles. pdf) FreakZ open source Zigbee project (http:/ / www. sourceforge. net/ projects/ freakz), Project homepage (http:/ / www. freaklabs. org), and Zigbee/802.15.4 chip comparison (http:/ / freaklabs. org/ index. php/ Articles/ Zigbee/ Zigbee-Chip-Comparison. html) IEEE 802.15.4 IEEE 802.15.4 is a standard which specifies the physical layer and media access control for low-rate wireless personal area networks (LR-WPANs). It is maintained by the IEEE 802.15 working group. It is the basis for the ZigBee, [1] ISA100.11a, [] WirelessHART, and MiWi specifications, each of which further extends the standard by developing the upper layers which are not defined in IEEE 802.15.4. Alternatively, it can be used with 6LoWPAN and standard Internet protocols to build a wireless embedded Internet. Overview IEEE standard 802.15.4 intends to offer the fundamental lower network layers of a type of wireless personal area network (WPAN) which focuses on low-cost, low-speed ubiquitous communication between devices (in contrast with other, more end-user oriented approaches, such as Wi-Fi). The emphasis is on very low cost communication of nearby devices with little to no underlying infrastructure, intending to exploit this to lower power consumption even more. The basic framework conceives a 10-meter communications range with a transfer rate of 250 kbit/s. Tradeoffs are possible to favor more radically embedded devices with even lower power requirements, through the definition of not one, but several physical layers. Lower transfer rates of 20 and 40 kbit/s were initially defined, with the 100 kbit/s rate being added in the current revision. Even lower rates can be considered with the resulting effect on power consumption. As already mentioned, the main identifying feature of IEEE 802.15.4 among WPANs is the importance of achieving extremely low manufacturing and operation costs and technological simplicity, without sacrificing flexibility or generality. Important features include real-time suitability by reservation of guaranteed time slots, collision avoidance through CSMA/CA and integrated support for secure communications. Devices also include power management functions such as link quality and energy detection. IEEE 802.15.4-conformant devices may use one of three possible frequency bands for operation.
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IEEE 802.15.4 23 Protocol architecture IEEE 802.15.4 protocol stack Devices are conceived to interact with each other over a conceptually simple wireless network. The definition of the network layers is based on the OSI model; although only the lower layers are defined in the standard, interaction with upper layers is intended, possibly using an IEEE 802.2 logical link
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  • Fall '18
  • Mr. Bhullar
  • Test, Wireless sensor network, TinyOS, zigbee

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