Wireless & Comunication Network

7/30/2019 Wireless & Comunication Network

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NAME: AJAY KUMAR

SEC: RK2R13R.NO: A-38


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Wireless communication is the transfer of information

over a distance without the use of electrical conductors or

"wires".

The distances involved may be short (a fewmeters as in television remote control) or long (thousands

or millions of kilometers for radio communications).


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PHOTOPHONE- ALEXANDER GRAHAM BELL 1880

RADIOMARCONI 1897

TELEPHONY 1946

FIRST CELLULAR COMMUNICATION SYSTEM

NTT/Japan deploys 1979

GSM SYSTEM

deployed in US, relabeled ``Global System for

Mobile Communications' 1994


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GLOBAL POSITIONING SYSTEM

CELLULAR TELEPHONES

CORDLESS COMPUTER PERIPHERALS

SATELLITE TELIVISION

WIRELESS GAMING


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Collection of transmitter andreceiver that communicates witheach other is known as wireless

network


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DIGITAL NETWORK- ROUTER THAT ROUT DATA

ANALOG NETWORK

LAN

MAN

WAN

GSM-GLOBAL SYSTEM FOR MOBILE COMMUNICATION

WI-FI-WIRELESS FIDELITY


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WI-FI

BLUETOOTH

CELLULAR NETWORK, Future wireless

POINT-TO-POINT COMMUNICATION,

POINT-TO-MULTIPOINT COMMUNICATION,

BROADCASTING,


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Wireless Technology is an alternative to WiredTechnology, which is commonly used, for connectingdevices in wireless mode.

Wi-Fi (Wireless Fidelity) is a generic term that refers tothe IEEE 802.11 communications standard for WirelessLocal Area Networks (WLANs).

Wi-Fi Network connect computers to each other, to theinternet and to the wired network.


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Wi-Fi Networks use Radio Technologies totransmit & receive data at high speed:

IEEE 802.11bIEEE 802.11a

IEEE 802.11g


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APPEAR IN LATE 1999

Operates at 2.4GHz radio spectrum

11 Mbps (theoretical speed) - within 30 m Range

4-6 Mbps (actual speed)

100 -150 feet range

Most popular, Least Expensive

Interference from mobile phones and Bluetooth devices which

can reduce the transmission speed.


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Introduced in 2001

Operates at 5 GHz (less popular)

54 Mbps (theoretical speed)

15-20 Mbps (Actual speed)

50-75 feet range

More expensiveNot compatible with 802.11b


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Introduced in 2003

Combine the feature of both standards (a,b)

100-150 feet range

54 Mbps Speed

2.4 GHz radio frequencies

Compatible with b


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1G

2G

3G

4G


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Abbreviation of fourth generation wireless technology

It will provide a comprehensive IP solution where voice ,data and multimedia can be given to user on an anytime ,anywhere basis.

It includes several types of broadband wirelesscommunication system access including cellular telephonesystem.

It will provide seamless mobility and internet access at arate of 100 Mbps.


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Support for multimedia services like teleconferencing andwireless internet.

Wider bandwidths and higher bitrates.

Global mobility and service portability.

Support for previous wireless technologies.

High internet speed.

tight network security.


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OFDM

UWB

SMART ANTENNAS

IPv6


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IT transmits large amounts of digital data over a radio wave.

OFDM works by splitting the radio signal into multiple smaller sub-signals that arethen transmitted simultaneously at different frequencies to the receiver .

By inserting a cyclic prefix between adjacent OFDM signal inter signalinterference is virtually eliminated if the max. channel delay spread is less than thetime interval of cyclic prefix.

In OFDM the sub carrier pulse used for transmission is rectangular.

Here modulation can performed by an IDFT ,which can be generated veryefficiently as an IFFT . so, receiver only needs a FFT to reverse this process.


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An advanced technology that can be used in 4G technology.

It is typically detected as noise.

It can use any part of the frequency spectrum, which means that it can usefrequencies that are currently in use by other radio frequency devices .

It uses a frequency of 3.1 to 10.6 Hz.

It uses less power , since it transmits pulse instead of continuous signal.

Special antennas are needed to tune and aim the signal.


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smart antenna can be employed to find tune ,and turn up signal information.

smart antenna can send signal back in the same direction that they come

from.

There are two types of smart antennas-

switched beam antenna:- It has fixed beams of transmission, and switch from predefined

beam to another when the user with the phone moves throughout the sector.

Adaptive array antenna :- It represents the most advanced smart antenna approach to

data using a variety of new signal It represent the most advanced smart antenna

approach to date using a variety of new signal processing algorithms to locate and

track the user, minimize interference, and maximize intended signal reception.


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IPv6 means Internet Protocol Version 6 .

The Internet Protocol (IP) is the method or protocol which data is sent from

one computer to another on the internet.

Each computer (known as a host) on the Internet has at least one IP that

uniquely identifies it from all other computers on the Internet.

It includes128 bits, which is 4 times more than 32bits IP address in IPv4.


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In wireless networks, Quality of Service (QOS) refers to the measure of

the performance for a system reflecting its transmission quality andservice availability.

4G is expected to have at least a reliability of 99.99%.

In 4G QOS may be divided in following ways-

Transaction-level QOS describes both the time it takes to complete atransaction and the packet loss rate.

Circuit-level QOS includes call blocking for new as well as existingcalls .

User-level QOS depends on user mobility and application type .


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In traffic control.

location application.

Telemedicine.

Video chatting


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POWER CONSUMPTION

COST AND REVENUE CONSIDERATIONS

MINIATURISATION AND PROCESSING CHALLENGES

AN ECOSYSTEM OF BUSINESSES


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Wireless & Comunication Network

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