Download IEEE 802.11x WiFi Protocol

IEEE 802.11x WiFi Protocol
Contents

Terminology Explained

802.11 Technical Underpinnings

802.11 Deployment

Concluzione!
801.11 Terminology Explained

Sounds like HiFi (marketable).

The WiFi denotation is essentially the branding
of certified 802.11 equipment to allow
interoperability between different
manufacturers of 802.11 ‘wireless’ equipment!
IEEE 802.11 Terminology Expl.

IEEE stands for the Insititute for Electrical and Electronics
Engineers, it is a multinational coalition for standardisation
and quality certification.

IEEE 802 is the established standard for LAN/MAN. The
number 802 was conveniently chosen because of its
numerical availability after 801.

IEEE 802.11 deals specifically with wireless networking as
opposed to ‘wired’ networking and the Ethernet 802.3
standard.
802.11 Technical Underpinnings

802.11 is spread via Radio Frequency technology. Digital data
signals are modulated by your computer and then transmitted, to
be received with an inverse operation.

802.11 typically utilises the ‘open’ ISM 2.4+-GHz and 5.7+-GHz
frequency bands to transmit its signals. Because these frequency
ranges are ‘unallocated’, bandwidth for WLAN is shared with
bluetooth devices, microwave ovens and cordless phones
amongst other things.

The maximum power gain on 802.11 is regulated by the ACMA
and is currently restricted to 36dB or 4W combined total.
Radio Frequency Spectrum
802.11 Underpinning Cont…

802.11 legacy has been standardised over the years
with three major amendments, 802.11b, 802.11g and
802.11a!

With each standard, beginning with B the first standard,
amendments were made to the choice of Modulation
Technology, Maximum Data Throughput and effective
range.
802.11 Data Sheet!
Deployment

Wireless implementation primarily deals with two important
standards the BSS and the IBSS. All other forms are derivations of
these principles.

The BSS is your traditional Client-Server model whereby Person A
can connect to Person C ONLY via a direct connection to Person
B. In this example person B is termed the server and persons A &
C the clients; in a wireless scenario person B would be some sort
of Access Point.

The IBSS is a more intuitive and logical approach, whereby any
one person can connect to another, whether or not a provider
exists to bridge the connections.
BSS/Infrastructure Mode
IBSS/Mesh-Networking/P2P
Concluzione!

Wireless is useful for consumer-grade applications.

Wireless can be cost-effective.

Wireless however cannot compare to the performance
achieved with wires.

Wireless still has yet to address key issues of
interference and prolonged signal propagation.
Bibliography
http://www.acorn.net.au/report/adhocnetworks/adhocnet.gif
http://www.mpirical.com/companion/UMTS/BSS.gif
http://www.ieee.org/portal/cms_docs/education/setf/cases/mul
timodephone/images/mmpw-usaspect1.jpg
http://www.acma.gov.au/WEBWR/radcomm/frequency_planni
ng/spps/0001spp.pdf
http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci
993747,00.html
http://www.dalewright.net/wpcontent/uploads/2006/11/broadcom-table1.gif