zigbee and ieee 802.15 - team.inria.fr · zigbee alliance introduction to zigbee/802.15.4 mardi 15...

ZigBee and IEEE 802.15.4 A (tiny) introduction

FUN Research Group i-Lab ETIPOPS Inria Lille – Nord Europe Etineo

Roudy DAGHER mardi 15 avril 14

The ZigBee metaphor

A group of bees distributed in a large field want to relay a message to a hive :

1.  Each bee perform a specific zigzag dance 2.  The dance is repeated by the next bee slightly closer to the hive 3.  Repeat the process until the message reaches the hive

mardi 15 avril 14 Introduction to ZigBee/802.15.4 - 2

OBJECTIVES

1. Background and Reference material for ZigBee and IEEE 802.15.4

2. The example of BitCloud stack implementation

3. Demo with SerialNet and protocol sniffing


References

•  Books –  “ZigBee Wireless Networks and Transceivers”. Dr. Shahin Farahani. –  “Zigbee Wireless Networking”. Drew Gislason.

•  Tutorials –  Jennic: e-learning course

•  BitCloud Zigbee stack from Atmel –  Stack: AVR2050, AVR 2052, BitCloud API Reference –  OTAU : AVR2054, AVR2058 –  SerialNet: AVR2051


OUTLINE

1. ZigBee Standard Essentials and pros

2. IEEE 802.15.4 standard essentials

3. Atmel BitCloud stack overview & demo(s)


The ZigBee standard Some basics

1 mardi 15 avril 14 Introduction to ZigBee/802.15.4 - 6

ZigBee – “A” WSN standard

mardi 15 avril 14 Introduction to ZigBee/802.15.4

•  Motivations -  Low cost, and ultra-low power consumption -  Unlicensed radio bands -  Flexible and extensible: on-line nodes add/removal -  Automatic network management & routing -  Interoperability & coexistence

•  Typical Application Areas: low data rates -  Building automation: ex. HVAC, light -  Monitoring: health care, vehicular, agriculture, water level, power consumption...etc

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ZigBee – “A” WPAN standard


ZigBee – Low Power Consumption


•  Autonomous network devices ü  Battery powered ü  Energy harvesting

•  Enhancing power autonomy ü  Low duty cycle ü  Sleep mode ü  Modulation schemes

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ZigBee – Easy to use


•  Less cables -  No network cables -  Power supply if no battery

•  Configuration options -  Pre-configured: by manufacturer, ex. Car sensors system.

-  Self-configured: by end-user, ex. Home lighting system. -  Custom: by System Integrator, ex. An OEM product.

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ZigBee Alliance


•  The ZigBee Alliance -  Defines the standards: spec + PICS

-  ZigBee & ZigBee PRO features -  ZigBee IP : ZigBee over IP (6LowPAN) -  Zigbee RF4CE : one to one communication

-  Defines a set of application profiles (ZSE, ZHA…)

•  Three compliancy levels -  ZigBee Certified Product -  ZigBee Compliant Platform -  ZigBee Manufacturer Specific (or Network Capable)

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ZigBee Compliance


•  Three compliancy levels ü  ZigBee Certified Product

ü  Permits the use of ZigBee name, literature & logos ü  Guarantees interoperability among products using the same public application profile

ü  ZigBee Manufacturer Specific (or Network Capable) ü  Permits the use of ZigBee name, literature & logos ü  Guarantees the product does not interfere with other ZigBee networks

ü  ZigBee Compliant Platform ü  Required by ZigBee stack vendors ü  Not required by product developers

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ZigBee Compliance 2/2


•  No certification ü  Company must still join ZigBee Alliance ü  No use of ZigBee name, literature, or logos is permitted

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ZigBee – Stack Software Architecture


ZigBee product example


Light Sensor

Light Controller

Zigbee Coordinator

Zigbee Router

Zigbee End Device

FFD RFD

Application Device Type

Logical Device Type

802.15.4 Device Type

End-user Perspective

Network Perspective

HW Capabilities Perspective

...

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ZigBee – Radio Communication


•  Channel Mask ü  Fixed ü  Best in List (agility)

•  Tx Range ü  100m outdoor ü  30m indoor ü  ~Km with amplifiers

•  Center freq in 2.4 GHz band

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ZigBee – coexistence with WIFI


ZigBee – coexistence with BLUETOOTH


802.15.4 – Network Topologies


ZigBee – Network Topologies


ZigBee – Data Communication Beacon-Enabled vs. Nonbeacon Networking


•  Contention-based channel access : CSMA/CA ü  First node that finds the channel free ü  That’s it !

•  Contention-free channel access : GTS per device ü  The PAN Coordinator syncs the nwk using beacons ü  All devices must wakeup periodically to resync.

ZigBee – Data Transfer 1/2 Beacon-Enabled vs. Nonbeacon Networking


ZigBee – Data Transfer 2/2 Beacon-Enabled vs. Nonbeacon Networking


The Atmel BitCloud stack A real world example


Zigbee – Standard Stack architecture


ZigBee – BitCloud Stack architecture



BitCloud Supported platforms

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Serialnet Application Principle


•  Network configuration and management •  Data transmission •  Power management •  Generic control •  Host interface control •  Hardware control •  Remote management

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Serialnet Application Architecture


Serialnet example : coordinator


Serialnet example : router


Introduction to ZigBee/802.15.4 mardi 15 avril 14

Demos with serialnet Zigbee frames analysis

3 - 32

BitCloud – Network creation Demo


1.  Coordinator starts the network : 1.  Beacon Request 2.  Beacon

2.  Router joins 1.  Beacon Request / Beacon 2.  Rejoin request/response and ACKs 3.  ZDP Device announcement - broadcast

3.  Link status messages

BitCloud – Broadcast Demo

1.  Coord & router

2.  Router broadcasts a data message with radius 12

3.  Coordinator rebroadcasts: 1.  Radius is decremented 2.  Network frame is the same (src address) 3.  MAC frame changes (src address)


NOM DU CHAPITRE Sous-titre facultatif


Thank you ! Any Questions?

Inria Lille – Nord Europe Salle A22

https://team.inria.fr/fun/

zigbee and ieee 802.15 - team.inria.fr · zigbee alliance introduction to zigbee/802.15.4 mardi 15...

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