WPAN Wireless Personal Area Network

Zigbee

• < 10 m omnidirectional • Low cost, low power, small range, small size • IEEE 802.15 Working Group – High Data Rate WPAN (11-55 Mbps) • 802.15.3 – Medium Data Rate WPAN (Bluetooth v 1.2 MAC & PHY) • 802.15.1 – Low Data Rate WPAN (MAC & PHY) • 802.15.4 • Industrial, Home, Medical Applications • Low cost, Low QoS requirements

Giuseppe Iannaccone

Giuseppe Iannaccone

Zigbee and IEEE 802.15.4

Zigbee

Bluetooth

• The Zigbee protocol – Low data rate, low power, low cost – For automation and remote control – from the Zigbee Alliance (www.zigbee.org) • Zigbee Alliance and IEEE joined forces for the development of the Zigbee protocol – PHY and MAC of Zigbee are provided by IEEE 802.15.4. Includes links for star, tree, mesh topologies

• Range: 10-75 m • Datarate: – 250 Kbps @ 2.45 GHz – 40 Kbps @ 916 MHz – 20 kbps @ 868 MHz • Simple network nodes: 254 • Wake up and receive time: – 15 ms • Redundant to remove “Single point of failure” • Transmitted power: 1-4 mW

• Range: 10 m (1dBm) • Datarate: – 1 Mbps @ 2.45 GHz

• Zigbee 1.0: Dec. 2004 • Zigbee 2007: Oct. 2007 Giuseppe Iannaccone

• Simple network nodes : 8 • Wake up and receive time: – 3s

• Transmitted power: 1 mW

Giuseppe Iannaccone

Channels 868MHz / 915MHz PHY

Channel 0

Channels 1-10

868.3 MHz

902 MHz

IEEE 802.15.4 (PHY) 2 MHz

928 MHz

• 2 services: – PHY DATA SERVICES – PHY Management SERVICES Phy (MHz)

2.4 GHz PHY

Channels 11-26

Frequency band (MHz)

5 MHz

868/915 2.4 GHz

2.4835 GHz

2450

Spreading Parameters Data Parameters Chip rate (kchip/s)

Mod.

Bit rate (kbps)

Symbol Rate (ksymb/s)

868-868.6

300

BPSK

20

20

Binary

902-928

600

BPSK

40

40

Binary

2400-2483

2000

O-QPSK

250

62.5

16orthogonal

• Receiver sensitivity (packet error rate