DEPARTMENT OF ECM
PERFORMANCE EVALUATION OF
WIRELESS SENSOR NETWORKS
BASED ON ZIGBEE TECHNOLOGY IN
Home Appliances Control In Smart Homes
Operation Mode In Smart Home
The Concept Of Smart Home
ZigBee Protocol Stack
Advantages of Zigbee
The integration of devices and an intelligent networking in
a home can make it smart by allowing us to manage energy
in a way that is appropriate.
To better control of energy consumption in the Smart
Home, the Home Area Network (HAN) is used to collect
Zigbee is a high technology for the Smart Home network
HOME APPLIANCES CONTROL IN SMART HOMES
It is necessary to investigate the electric power sources
that support the normal operation and management in a
It is necessary to know what kind of configuration and
control are indispensable to build a smart home.
Architectural and functional requirements on behalf of
utilities in the design of smart homes should be taken
into serious consideration.
OPERATION MODE IN A SMART HOME
The smart control mainly consists of three types of scenarios:
When the residents stay at home.
When there is nobody at home.
When the meter receives the notification of demand-response
ZigBee and IEEE 802.15.4 are standards-based protocols that
provide the network infrastructure required for wireless sensor
For sensor network applications, key design requirements
support communication between large numbers of devices in
Energy Management and Efficiency
Design and Implementation
The structure of Wireless Sensor Networks in the
smart home requires three different devices:
Coordinator, Router and End Device.
All home environments can then be monitored and
the required data can be delivered to the coordinator.
Then appropriate control commands are sent
through coordinator to home appliances.
In this environment, the coordinator is integrated with the home gateway
that handles the control data in the mesh network.
The household devices are attached to the router or the reduced function
In order to address the problem of interconnection between appliances and
the Zigbee wireless module, we adopted the SAANet Protocol.
The experimental system is divided into three main parts:
• A user interface communicates with the user via the computer
and displays the results.
• A coordinator collects sensor readings to the user.
• An end device consists of two parts: sensor interface and
ZigBee interface. The sensor used in this test is a temperature
Operation Mode in a Smart Home
In terms of energy management, the operation mode is intended for
oHVAC system integrated with thermostats and Infrared/motion sensors.
oDaily appliances with thermostat.
oLighting system connected with temperature sensors.
oDigital entertainment appliances with Infrared or motion sensor.
Renewable energy sources.
oPV system/wind turbine.
oPHV/PHEV(plug-in hybrid vehicle)
Technology Requirements of utilities in a Smart
Home Area Network in secure communication with utilities
Networking patterns and technology for home
The network infrastructure is the basic skeleton for smart home
construction. The smart home is functionally categorized into two main
• Broadband communication network
• Control network
The broadband communication network is mostly attached to home
The control network mainly supervises the regular operation for all
kinds of home devices such as the switching-on/off for lamps, start/stop
Technically, two types of networking techniques are widely
adopted in the field of home appliance control.
Directly transmit data over power lines. The mainstream protocol is
PLC (Power Line Communication).
Exchange data between sender and receiver in a wireless. The
representative protocols in that case are Bluetooth, 802.15.4/ZigBee .
There are some factors such as a distance between the end device and the coordinator and
also some obstacles which affected to the RSSI performance.
On the contrary, the presence of a variable speed drive does not obstruct the signal sent
by the Zigbee modules.
All in all, the quality of wireless link of WSNs based on Zigbee technology depends on
the distance between nodes, the location of each sensor nodes and obstacles between
All these communication systems Wi-Fi, Zigbee and Bluetooth operate at the same
frequency bands. However, the interference problem between Zigbee and other devices
In this context, future research will be based on the possibility of coexistence between
these different wireless protocols in a smart home.