2008
Chapter-3 L29: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
1
DEVICES AND COMMUNICATION
BUSES FOR DEVICES NETWORK–
Lesson-29: WIRELESS AND MOBILE
SYSTEM PROTOCOLS─ ZigBee
2008
Chapter-3 L29: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
2
Wireless Personal Area Network (WPAN)
λ
IrDA (Infrared Data Association)
λ Bluetooth 2.4 GHz
λ
802.11 WLAN and 802.11b WiFi
λ ZigBee 900 MHz
2008
Chapter-3 L29: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
3
λ IEEE standard 802.15.4 protocol.
λ Physical layer radio operates 2.4 GHz
band carrier frequencies with DSSS
(direct sequence spread spectrum).
λ Supports range up to 70 m.
λ Data transfer rate supported 250 kbps.
λ Supports sixteen channels.
ZigBee Wireless Personal Area connected devices
2008
Chapter-3 L29: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
4
ZigBee network feature
λ Self-organising and supports peer-to-peer
and mesh networks.
λ Self-organising means detects nearby
Zigbee
device
and
establishes
communication and network.
2008
Chapter-3 L29: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
5
Peer-to-peer and mesh networka
λ Each node at network function as requesting
device as well as responding device.
λ Mesh network means the each nodes
network function as a mesh.
λ A node can connect to another directly or
through
mutually
interconnected
intermediate nodes. Data transfer is
between two devices in Peer-to-Peer or
between a device and multiple devices in
the mesh network.
2008
Chapter-3 L29: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
6
ZigBee protocol
embedded device
or computer
ZigBee coordinator
ZigBee protocol
embedded printer
(tranceiver)
ZigBee prot