TOPIC: “COMPARISON OF VARIOUS
WIRELESS SYSTEMS”
SUBMITTED TO: SUBMITTED BY:
MR. VEERATI RAJU ANUPMA
ABSTRACT
The wireless communication is the transfer of information without the use of wires. The
distances involved may be short (a few meters as in television remote control) or long (thousands
or millions of kilometers for radio communications). The term is often shortened to "wireless".
It encompasses various types of fixed, mobile, and portable two-ways radio, cellular telephones,
personal digital assistants (PDAs), and wireless networking. Other examples of wireless
technology include GPS units, garage door openers, wireless computer mice, keyboards and
headset, satellite television and cordless telephones.
This term paper gives brief idea of wireless systems, architecture of wireless systems and
detailed study of comparison between various wireless systems.
INTRODUCTION
The wireless communication is the transfer of information without the use of wires. The
distances involved may be short (a few meters as in television remote control) or long (thousands
or millions of kilometers for radio communications). The term is often shortened to "wireless".
WIRELESS SYSTEM COMPONENTS
A wireless network consists of several components that support communications using radio or
light waves propagating through an air medium. Some of these elements overlap with those of
wired networks, but special consideration is necessary for all of these components when
deploying a wireless network.
Wireless Networks Include Computer Devices, Base Stations, and a Wireless Infrastructure
Users
A user can be anything that directly utilizes the wireless network. One of the most
common types of user is a person. For example, a business traveler accessing the Internet
from a public wireless LAN at an airport is a user. Users are an important part of the
wireless network.
The user initiates and terminates use of a wireless network, making the term end-user
appropriate. Typically, a user operates a computer device, which often performs a variety
of application-specific functions in addition to offering an interface to the wireless
network.
Computer Devices
Many types of computer devices, sometimes referred to as clients, operate on a wireless network.
Some computer devices might be specifically designed for users, whereas some computer
devices are end systems. In generally, any computer device might communicate with any other
computer device on the same wireless network.
Air Medium
Air serves many purposes, such as providing a basis for speech, enabling air travel, and
sustaining life. Air also provides a medium for the propagation of wireless communications
signals, which is the heart of wireless networking. Air is the conduit by which information flows
between computer devices and the wireless infrastructure.
Wireless Network Infrastructures
The infrastructure of a wireless network interconnects wireless users and end systems. The
infrastructure might consist of base stations, access controllers, application connectivity
software, and a distribution system. These components enhance wireless communications and
fulfill important functions necessary for specific applications.
Base Stations
The base station is a common infrastructure component that interfaces the wireless
communications signals traveling through the air medium to a wired network—often referred to
as a distribution system. Therefore, a base station enables users to access a wide range of
network services, such as web browsing, e-mail access, and database applications. A base station
often contains a wireless NIC that implements the same technology in operation by the user's
wireless NIC.
Base stations go by different names, depending on their purpose. An access point, for instance,
represents a generic base station for a wireless LAN. A collection of access points within a
wireless LAN, for example, supports roaming throughout a facility. The NIC within a user's
computer device connects with the nearest access point, which provides an interface with
systems within the infrastructure and users associated with other access points. As the user
moves to a part of the facility that's closer to another access point, the NIC automatically
reconnects with the closest access point to maintain reliable communications.
Comparison of Mobile Communication Systems — Mobile Station
SERVICE COVERANGE REQUIRED COMPLEXICITY HARDWARE CARRIER FUNCTIONAL
RANGE INFRASTRUSTURE COST FREQUENCY ITY
TV LOW LOW LOW LOW INFRARED TRANSMITTER
REMOTE
CONTROL
GARAGE LOW LOW LOW LOW <100 MHZ TRANSMITTER
DOOR
OPENER
PAGING HIGH HIGH LOW LOW <1 GHZ RECEIVER
SYSTEM
CORDLESS LOW LOW MODERATE LOW < 100MHZ TRANSMITTER
SYSTEM
CELLULAR HIGH HIGH HIGH MODERATE <1 GHZ TRNSMITTER
SYSTEM
Comparison of Mobile Communication Systems — Base Station
SERVICE COVERANG REQUIRED COMPLEXICITY HARDWARE CARRIER FUNCTIONAL
E INFRASTRUSTURE COST FREQUENCY ITY
RANGE
TV LOW LOW LOW LOW INFRARED RECEIVER
REMOTE
CONTROL
GARAGE LOW LOW LOW LOW <100 MHZ RECEIVER
DOOR
OPENER
PAGING HIGH HIGH HIGH HIGH <1 GHZ TRANSMITTER
SYSTEM
CORDLESS LOW LOW LOW MODERATE < 100MHZ TRANSMITTER
SYSTEM
CELLULAR HIGH HIGH HIGH HIGH <1 GHZ TRANSMITTER
SYSTEM
