wireless revolution (2)

8/7/2019 Wireless revolution (2)

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Submitted By:Manzoor Elahi Laskar (30)Sagardwip Dey (44)

Diganta Sankar Deb Chowdhury (39)Akashdeep Deb (38)

Submitted To:Deepjyoti Choudhury


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What is Wireless Revolution

y Wireless Revolution means in simple terms the

replacement of wires used for communication, bywireless environment. For instance Local area

network (LAN) has been replaced by WLAN

(Wireless LAN), similarly fixed line telephones have

been replaced by Mobile handsets including satellite

handsets.


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Wireless Communicationy Wireless communication is the transfer of

information over a distance without the use of

enhanced electrical conductors or wires. The

distance involved may be short (a few meters as intelevision remote control) or long (thousands or

millions of kilometers for radio communications).

Wireless communication is generally considered to

be a branch of telecommunications. It encompasses

various types of fixed, mobile, and portable two-way

radios, cellular telephones, personal digital

assistants (PDAs), and wireless network. Other

examples of wireless technology include GPs units,

garage door openers, wireless keyboards & Mouse,


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History of Wireless

Technologyy The true advent of wireless technology came over acentury ago and countless little devices such televisionremotes, cordless telephones and radios use the samebasic wireless technology. The wireless is currently

extremely exciting given the recent explosion ofdevelopment and popularity over the last decades beforethat, wireless technology lay at the roots of ourcommunications systems and lives.

y In The Beginning

It was not long ago that when people used the termwireless they were referring to their radios. These work byreceiving coded information sent by radio transmitters from

up to great numbers of miles away. These EM waves arethen decoded


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back into their original form, usually of voice or music.

y

The first detection of radio waves was discovered in 1887by Heinrich Hertz who was able to transmit and receivethese mysterious waves.

y Claiming that his discovery would have no impact on theworld at all, he left it up to Tesla a few years later todevelop this finding.

y At around the same time Marconi was also on the sceneand he further managed to transmit radio waves withincreasing understanding and accuracy.

The Next Chapter

y GSM, or the Group Special Mobile, tried to develop adigital system for its cellular systems. The GSM werecreated in 1982 to create a network for mobiletelephones that could be used across Europe.

y In 1980s DECT, or Digital Enhanced Cordless

Telecommunications, was also being invented.


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Todays World

y The Wi-Fi standard was first used & deployed in

1997 with a maximum bandwidth of just 2 Mbits/s.

y Bluetooth was created a year later in 1998 & its first

product, a wireless headset for mobile phones, was

released in 2000.


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Wireless Revolution

Great for Consumers Tough For Employers

y The Flexibility, convenience and sophistication of

wireless technology is great for consumer.

y Finding skilled wireless workers to design, build and

maintain all this new technology is a real problem.


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Wireless Devices

Wireless Broadband

A new technology that provides high-speed wirelessinternet & data network access over a wide area.

Broadband means having instantaneous

bandwidth greater than 1 MHz & supporting data rates

greater than about 1.5 Mbit/s.Wireless Broadband features speeds roughly

equivalent to wired broadband access, such as that of

ADSL or a cable modem.


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Technology and Speed

y Few Wireless Internet Service Providers (WISPs)

provide download speed of over 100 Mbit/s; most

broadband wireless access services are estimated tohave a range of 50 km (30 miles) from a tower.

y Technologies used include LMDS & MMDS, as wellas heavy use of the ISM bands.


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Mobile wireless broadbandy Also called Mobile Broadband

y Technologies include new services from companies

such as Verizon, Sprint, AT&T Mobility

y Consumers can purchase a PC card, laptop card, or

USB equipment to connect their PC or laptop to the

Internet via cell phone towers.


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Wireless Networky Wireless network refers to any type of computer

network that is wireless, and is commonly associated

with a telecommunications network whose

interconnections between nodes are implementedwithout the use of wires.

y Wireless networks are generally implemented with

some type of remote information transmissionsystem that uses electromagnetic waves, such as

radio waves.


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Types of wireless connection

networksy Wireless Personal Area Networks (WPANs)

interconnect devices within a relatively small area,

generally within a reach of a person.Ex Bluetooth provides a WPAN for

interconnecting a headset to a laptop.


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y

Wireless LANA wireless local area network (WLAN) links two

or more devices using a distribution method, and

usually providing a connection through an access point

to the wider internet.y Gives the user the mobility to move around within a

local coverage area & still be connected to the

network.

y

Wi-Fi: Wi-Fi is increasingly used as a synonym for802.11 WLANs.

y Fixed Wireless Data: This implements point to point

links between computer or networks at two locations,

using microwave or laser beams over line of sight

paths.


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y Wireless MAN

Wireless Metropolitan Area Networks are a type

of wireless network that connects several Wireless

LANs.

y Wireless WAN

Wireless wide area networks are wireless

networks that typically cover large outdoor areas.

These networks can be used to connect branch offices

of business or as a public internet access system.

A Typical system contains base station

gateways, access points and wireless bridging relays.


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Wireless Router

A wireless router is a device that perform the functionof a wireless access point. It is commonly used to

allow access to the Internet or a computer network

without the need for a cabled connection. It can

function in a wired LAN, a wireless only LAN, or amixed wired/wireless network. Most current wireless

routers have the following characteristics:

o LAN ports, which function in the same manner as the

ports of a network switcho A WAN port, to connect to a wide area network,

typically one with Internet access

o Wireless antennae. These allow connections from

other wireless devices (like NICs network interface

cards), wireless repeaters, wireless access points,


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Wireless modem

A wireless modem is a type of modem which connects

to a wireless network instead of to the telephone

system. When you connect with a wireless modem,

you are attached directly to your wireless ISP & youcan then access the Internet.


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BLUETOOTH

Bluetooth is a standard for a small, cheap radio chip to

be plugged into computers, printers, mobile phones,

etc. A Bluetooth chip is designed to replace cables by

taking the information normally carried by the cable, &

transmitting it at a special frequency to a receiver

Bluetooth chip, which will then give the information

received to the computer or phone.


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What Can You Do with Bluetooth?

y Wireless Headsets: The most widely used Bluetooth

devices are the wireless headsets of mobile phones.

Using these headsets, you can talk on the phone while in

motion, without the hassle of wires.

y Car kits: A natural extension of the Bluetooth headset is

the hands-free car kit. A Bluetooth car kit allows you touse your voive to operate the phone, and talk on the

phone via the cars built-in audio system, they can also

display caller IDs, caller pictures, and other call

information in dash.

y Keyboard and mice: common computer accessories like

keyboard and mice can be connected to PC via

Bluetooth. This helps to keep the office desk tidy, But

more importantly, some Bluetooth keyboards and mice

also work with smartphones and PDAs.


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y Wireless access points: Bluetooth can provide

connectivity from devices to an internet access point.For instance, you can share a wireless internet

connection from a mobile phone to a laptop via

Bluetooth, This way, you can use your laptop to

browse the internet whenever our phone has asignal, compared with regular Wi-Fi, the wireless

internet via the mobile phone network is more

pervasive, cheaper, and often faster.

y

Printing: With a Bluetooth-enabled printer, you canprint photos or documents directly from a digital

camera, a camera phone, or a laptop. This type of

printer is ideal for field workers or busy professionals


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y Handheld navigation: Bluetooth-enabled GPS

receiver cab be connected to PDAs, smartphones, orlaptops. We can leave the GPS receiver in your

pocket or backpack, and use the mapping software

on the computers to navigate.

y Remote control: Bluetooth smartphones ortouch/type pads can be used as a remote control for

computers (PCs and Macs). We can control

PowerPoint presentation media playback, or

arbitrary application on the computer. Thesmartphones screen displays information relevant to

the task running on the computers, for instance, the

remote control smartphones can display the current

slide note during a PowerPoint presentation.


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y File transfer: Computers, including mini-computers

like PDAs and Smartphone's, can send files to each

other via Bluetooth connections. You can transferphotos from a camera phone to a computer,

install Smartphone applications from a computer,

or exchange documents between laptops in a

conference room.


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y Wireless USB: Wireless USB is a short-range, high-bandwidth wireless radio communication protocolcreated by the Wireless USB Promoter Group.

Wireless USB is sometimes abbreviated as "WUSB",although the USB Implementers Forum discouragesthis practice and instead prefers to call thetechnology "Certified Wireless USB" to differentiate itfrom competitors. Wireless USB is based on the Wi

Media Alliance's Ultra-Wide Band (UWB) commonradio platform, which is capable of sending 480 Mbit/s atdistances up to 3 meters and 110 Mbit/s at up to 10meters. It was designed to operate in the 3.1 to 10.6GHz frequency range, although local regulatory policies

may restrict the legal operating range for any givencountr


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y Content provision : As mentioned earlier ,

Bluetooth can be used to provision photos,

ringtones, and other multi- media contents tosmart phones from computers. In fact, some retail

stores have even installed Bluetooth booths to sell

mobile-phone content to customers.


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y Social networking : Bluetooth devices candiscover and communicate with near by devices.They can facilitate communications between

strangers who happen to be in the proximity.Nokia Sensor is a free Bluetooth application forSeries 60 smart phones. You can publish yourpersonal profile, including photos, on your

Bluetooth smart phone, and nearby Sensor userscan then view your profile on their smart phones.You can also search for and view Sensor profilesnear by. If you find an interesting profile, you canmessage that person, or simply walk over to strike

up a conversation.


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y Device synchronization: Old PDAs synchronize their

contact lists, calendars, and email with computers

via bulky cradles. The newer generation ofSmartphone's (and PDA phones) support

synchronization via Bluetooth.


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yWireless mouse: The primary and most obviousexample of the benefit of the wireless mouse is thatit has no wires. The wireless mouse communicatesby sending information from the mouse to a receiverattached to the computer. This receiver is most often

in the form of a USB adaptor of some kind. It is greatto be able to use your mouse without the cordgetting stuck, as well as to be able to drag themouse along with you at a bit of a distance whilestudying.

y The advantage of the wireless mouse is that it canbe particularly easy to travel with, as the wire doesnot get caught on things. There are specific laptopmodels available that work particularly well for this

application, some models even being able to attachto the side of a la to to be taken alon with it.


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y Mobile Phone: A mobile phone is an electronic

device used for full duplex two- waytelecommunications over a cellular network of base

station known as cell sites. Mobile phones differ from

cordless telephones, which only offer telephone

service within limited range through a single basestation attached to fixed land line, for example within

a home or an office.


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y Wireless keyboard: sometimes sitting close to our

computer monitor at a desk can be uncomfortable. Awireless keyboard is exactly the same as a normal

computer keyboard except for one major differences:

wireless keyboard transfer typing data to the

computer via infrared beams. A beam of informationis sent from the keyboard, as you type, to a reciver,

which plugged into the computer. This allows for a

cordless experience, which eliminates the potential

for another tangled cord behind your computer.


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wireless revolution (2)

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