Image Processing Reference
In-Depth Information
•
Accutech [] also supplies an FHSS, MHz ISM band solution for its wide range of
devices.
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ABB Ltd. pioneered the use of wireless communication for discrete manufacturing con-
trol applications with their wireless interface to sensors and actuators (WISA) technology
[]. WISA provides real-time wireless communication based on a TDMA protocol,
combined with frequency hopping based on the physical layer of IEEE ...
27.5.2 Technology Primer
27.5.2.1 ZigBee
.... Architecture
ZigBee is a specification for a cost-effective, low-rate, and low-power wireless communication
protocol for home automation, monitoring, and control. It aims to provide short-range wireless net-
working, which is scalable, self-organizing, and secure, while providing battery life up to years.
Although having existed since late , ZigBee is yet to prove its success, at least in the industrial
domain where reliability and security are of utmost importance.
ZigBee is a specification for the higher protocol layers, and builds upon the physical (PHY) and
medium-access control (MAC) layers in the IEEE .. specification [], as seen in Figure ..
.... Basic Functionality
Mesh networking topology is supported and routing is achieved through the ad hoc on-demand
distance vector (AODV) algorithm. his means that the devices themselves that are responsible for
route discovery, and that peer-to-peer communication is possible. In a ZigBee network, all nodes
ZigBee
Layer 7
application
Application and
security
Layer 6
presentation
Layer 5
session
Layer 4
transport
Layer 3
network
Ad hoc routing mesh
network
Layer 2
data link
IEEE 802.15.4-2006
Layer 1
physical
IEEE 802.15.4-2006
FIGURE .
ZigBee protocol stack.