wilamowski-b-m-irwin-j-d-industrial-communication-systems-2011

ZigBee 50-3
Wireless communication landscape
WPAN
WLAN
–
–
IEEE 802.15.1: Bluetooth –
ZigBee
Class 1
Class 2
Class 3
OCARI
IEEE 802.15.4 –
WirelessHART
ISA100.11a
802.11a
802.11b
WiFi –
802.11g
802.11n
DECT
HiperLAN
WMAN
–
WirelessMAN IEEE 802.16 –
Fixe (IEEE 802.16-2004)
WiMAX –
Mobile (IEEE 802.16e)
WiBro (Wireless Broadband: Korean standard)
WWAN
–
Mobile Broadband Wireless Access (MBWA) (IEEE 802.20)
Wireless Regional Area Networks (WRAN) (IEEE 802.22)
TETRA
GSM
Cellular Networks – GPRS
EDGE
3G
FIGURE 50.2
Wireless technology landscape.
Table 50.1 A Comparison of LR-WPAN with Other Wireless
Technologies
WLAN
(802.11)
Bluetooth-Based
WPAN (802.15.1)
Low-Rate WPAN
(802.15.4)
Range ∼100.m ∼10–100.m ∼10.m
Data throughput ∼2–11.Mbs ∼1.Mbs ∼0.25.Mbs
Power consumption Medium Low Ultralow
Size Larger Smaller Smallest
Cost/complexity >6 1 0.2
50.5 IEEE 802.15.4
The goal of the IEEE 802.15.4 task group is to define the PHY and MAC layers specifications for lowcost,
low data rate and hence, low-complexity wireless connectivity of mobile or stationary devices with
limited battery capability.
The relationship between IEEE 802.15.4 and ZigBee is that ZigBee makes use of the IEEE 802.15.4
standard for the lower two OSI layers (PHY and MAC layers) and specifies the upper layers as well as
being the name for the whole technology from a marketing perspective where ZigBee stands for the full
technological solution based upon IEEE 802.15.4.
The key features of IEEE 802.15.4 are
• 2.4.GHz and 868/915.MHz frequency band options
• Support for star and peer-to-peer topologies; therefore, supports a wide variety of routing protocols
and topologies
© 2011 by Taylor and Francis Group, LLC