Abstract—
Industry of street lighting systems are growing
rapidly and going to complex with rapid growth of industry and
cities. To control and maintain complex street lighting system
more economically, various street light control systems are
developed. Nevertheless most of developed systems have some
drawbacks.
So we are going to develop new light control system which can
overcome old systems drawbacks. We surveyed various street
light control systems and analyzed its characteristics. Through
these efforts, we found that common drawbacks of most light
control systems are uneasiness of handling and difficulty of
maintenance. To reduce uneasiness of handling and difficulty of
maintenance in operating light control system, we designed new
street light control system by using Zigbee communication
technique.
In this thesis, we describe on the H/W design of new street
light control system designed by using Zigbee communication
protocol.
Index Terms— H/W Design, Remote Control terminal, Street
Light Control System, Zigbee,
I. INTRODUCTION
Treet light control system is a centralized system which
control and monitor status of street lights installed
alongside load. Lights are switched to ON/OFF by this
system’s control command. Its local status information is also
monitored by control system via communication channel.
Status information which is monitored are on/off status
information, energy saving mode status, control group status
information and safety related information, etc.
To transfer control command and status information
between street light control system and remote street light
control terminals which installed at each light pole, various
communication media and communication protocols are using.
As communication media, wireless or power lines are used
generally. Various frequency bands from tens of MHz to RF
bands are used for wireless case. The reason of why these media are used mainly is its
easiness of installation and maintenance. There are no needs
to install additional transmission line and it is more
economical than other media’s case.
Compare to wireless channel, PLC lines have some
advantages. PLC based control system is easy to design
because there are no obstacles to communication path. It does
not need additional wire for communication and repeaters
which used for RF communication system sometimes to evade
obstacles like buildings.
But it has disadvantages also. Price of remote controller is
higher than that of wireless case and there are no
communication way when if short circuit problems aroused.
For the case of short circuit in the middle of power line,
remote terminals following short circuit point can’t transfer
data. So, control system can’t read status information on short
circuit and operators can’t do any action immediately and it
can cause fatal safety problems.
Electrical shock was longtime problem of electrical power
system since usage of electricity. Still it is main problem of
electric power supply system, especially for street light control
system because it is installed at open space and along the
roadside through long distance. Heavy rain, traffic accident,
etc make big trouble sometimes. So every street light control
system should make countermeasure on safety problem.
Maintenance is also one of main consideration factor. Every
street light control system operators want to reduce
maintenance costs and number of person for repair. To reduce
costs and number of person, street light control systems
should have high stability and can give required information
when operators need information for maintenance and
operation. For these reason, reliable communication path and
technique that is adequate for street line control system is
required.
We designed new street light control system that is reliable
and cost effective by using Zigbee communication system
technique. For that, we surveyed characteristics of street light
control systems and tried to enhance safety level.
In this paper, we describe on new street light control
system we designed.
In following section 2, we will describe on requirement
analysis on street light control system. We represent on
communication channel characteristics, system design factors,
and system H/W design, etc. In chapter 3, detailed H/W
design including block diagram will be described.

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