Objective of this Presentation To understand what is Wi-Fi and what is Bluetooth. Difference between Bluetooth and Wi-Fi.

Sections of the Presentation 1.What is Wi-Fi? 2.Brief History of Wi-Fi. 3.Types of Wi-Fi. 4.Why Wi-Fi is used. 5.What is Bluetooth? 6.Brief History of Bluetooth. 7.How does it works. 8.What is it’s Range. 9.Bluetooth VS Wi-Fi.

What is Wi-Fi? Short for wireless fidelity and is meant to be used generically when referring to any type of network, whether b, a g, dual- band, etc Wi-Fi is a wireless technology that uses radio frequency to transmit data through the air

Brief History IEEE (Institute of Electrical and Electronics Engineers) established the Group in Specifications for standard ratified in 1997 Initial speeds were 1 and 2 Mbps IEEE modified the standard in 1999 to include a and b g was added in b equipment first available, then a, followed by g IEEE create standard but Wireless Ethernet Compatibility Alliance certifies products

802.11a Completely different from 11b and 11g. Flexible because multiple channels can be combined for faster throughput and more access points can be co- located Shorter range than 11b and 11g Runs in the 5 GHz range, so less interference from other devices Has 12 channels, 8 non-overlapping, and supports rates from 6 to 54 Mbps, but realistically about 27 Mbps max Uses frequency division multiplexing technology

802.11b Been around the longest, well-supported, stable, and cost effective, but runs in the 2.4 GHz range that makes it prone to interference from other devices (microwave ovens, cordless phones, etc) and also has security disadvantages Limits to the number of access points in range of each other, three Has 11 channels, with 3 non-overlapping, and supports rates from 1 to 11 Mbps, but realistically about 4-5 Mbps max Uses direct-sequence spread-spectrum technology

802.11g Extension of b, with the same disadvantages (security and interference) Has a shorter range than b Is backwards compatible with b so it allows or a smooth transition from 11b to 11g Flexible because multiple channels can be combined for faster throughput, but limited to one access point Runs at 54 Mbps, but realistically about Mbps and about 14 Mbps when b associated Uses frequency division multiplexing technology

Why Wi-Fi? Setup Cost – Reduced cabling required Flexibility – Quick and easy to setup in temp or permanent space Scalable – Can be expanded with growth Freedom – You can work from any location that you can get a signal Lower total cost of ownership – Because of affordability and low install cost

What is Bluetooth? Bluetooth wireless technology is a short-range communications technology intended to replace the cables connecting portable and/or fixed devices while maintaining high levels of security. The Bluetooth specification defines a uniform structure for a wide range of devices to connect and communicate with each other.

Brief History Bluetooth is named after King Harald Bluetooth of Denmark, who united his country in the 10th century. Ericsson, along with Nokia, IBM, Toshiba and Intel formed the Bluetooth Special Interest Group (SIG). This association represented leading companies in mobile telephony, notebook computers and a market leader in digital signal processing technology.

How does it work? Bluetooth takes the information normally carried by a wire and transmits it at a special frequency to another Bluetooth device. Both the sending and receiving devices have what is called a Bluetooth receiver chip, which translates data into a wireless transmission and then back to normal again, depending on if it is sending or receiving data.

What is the range? Class 3 radios – have a range of up to 1 meter or 3 feet Class 2 radios – most commonly found in mobile devices – have a range of 10 meters or 30 feet Class 1 radios – used primarily in industrial use cases – have a range of 100 meters or 300 feet

Bluetooth vs. Wi-Fi Wi-Fi offers a means to wirelessly connect one or more computers to each other and to a router so they can access the Internet. Wi-Fi range can reach longer distances than Bluetooth and transfers data faster as well. Bluetooth is a short-range wireless medium but offers a means to link not just computers, but PDAs, headphones, headsets, printers and other technology with each other.

Bluetooth vs. Wi-Fi