IRJET- Wi-Fi, WiMAX & WiGig: A Comparative Study

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072
© 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 2228
Wi-Fi, WiMAX & WiGig: A Comparative Study
Loksai Pothineni1, G S S Karteek2, V R Venuu Maadhav3, A R S Yaswanth4, Dr.Manikandan K5
1,2,3,4 Dept. of Computer Science and Engineering, Vellore Institute of Technology, Tamil Nadu, India
5Dept. of Computer Science and Engineering, Vellore Institute of Technology, Tamil Nadu, India
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Abstract - Wi-Fi, WiMax & WiGig came into market
promising wireless broadband access solutions for the Future
generation of wireless Technology. These three networks can
support connection oriented transmissionsandbetterservices.
This paper represents the correlationamongstWiMax(802.16)
and Wi-fi(802.11) based on different parameters i.e., Network
architectures, Technologies utilized, Benefits of WiMax, Wi-fi,
Communication run, Operating frequency and Data security
risks. This paper decides the normal forthcoming changes in
the remote advancements. Usually in remote inaccessible
areas wired networks are not at all cost effective and we have
come so far developing broadband wireless networks which
provide us with more capacity as well as coverage. This paper
provides detailed technical as well as working differences
between 802.11a,b,g(Wi-Fi),802.16(WiMaX) and 802.11ad
(WiGig).
Key Words: Wi-Fi, WiGig, WiMAX,AES algorithm,OFDM
1. INTRODUCTION
All the 802.11 specifications utilize the Ethernet Protocol
and Carrier Sense Multiple Access with Collision Avoidance
(CSMA/CA) for way sharing. The first modulation utilizedas
a part of 802.11 was phase-shift keying(PSK). In any case,
different plans, for example, complementary code keying
(CCK), are utilized as a part of a portion of the newer
specifications. The more up to datemodulationmethodsgive
higher information speed and decreased vulnerability to
interference.
2. Overview of Wi-Fi,WiMAX and WiGig:
2.1.1 The IEEE 802.11a:
IEEE 802.11a is a standard wifi protocol which came into
existence in 1998 which had maximum rate of around 54
mbps and have fallback rates ranging upto
48,36,24,18,12,9,6 mbps in channel 12 with frequency
around 5ghz in orthogonal frequency division
multiplexing[64 channels].
 802.11a uses a half duplex network
 802.11a uses a modulation techniques includes
BPSK,QPSK
 Encryption technique used in 802.11i and access
protocol used is csma/ca
 Never achieved success due to high cost
 Prevalently used in business and larger networks
Advantages of 802.11a:
 Higher speeds
 Prevent signal interference
Disadvantages of 802.11a:
 Higher cost
2.1.2 The IEEE 802.11b:
IEEE 802.11 b is a standard wifi protocol which came into
existence in 1998 which had maximum rate of around 11
mbps which is comparable to Ethernet and have fall back
ranging from 5.5mbps,2mbps,1mbps in channel 3 with
frequency around 25mhz in Direct sequence spectrum
 802.11b uses a half duplex network
 Bandwidth efficiency is less than 0.44bps
 802.11b uses a modulation techniques includes
QPSK
 Encryption technique used is aes in 802.11i and
access protocol used is CSMA/CA
 Cheaper than 802.11 b which made this a
commercial success
 Prevalently used in smaller area network likehome
networks
Advantages of 802.11b:
 Low cost
 Range of Signal is good
Disadvantages of 802.11b:
 Lower speeds
2.1.3 The IEEE 802.11g:
In 2002 and 2003, WLAN itemssupporting a moreuptodate
standard called 802.11g was developed available on the
market. 802.11g endeavors to join the best of both 802.11a
and 802.11b. 802.11g supports data transmission up to 54
Mbps, and it utilizesthe 2.4 GHz Frequency for higher range.
802.11g is in reverse perfect with 802.11b, implying that
802.11g access focuses will work with 802.11b remote
system connectors and the other way around. It uses half
duplex network. Modulation techniques include DBPSK,
DQPSK, and DSSS. It uses a radio technique orthogonal
frequency division multiplexing (OFDM).

Advantages of 802.11g –
Fast most extreme speed; signal range is great and not
effectively discouraged.
Disadvantages of 802.11g –
Costs more than 802.11b; apparatuses may interfere on the
unregulated signal frequency.
2.1.4 The IEEE 802.16:
WiMAX stands for Worldwide-Interoperability-for-
Microwave-Access. It is a wirelesscommunicationsstandard
and is defined as IEEE standard 802.16. It can alsobeusedas
an alternative broadband instead of usingcableandDSL.The
IEEE developed the 802.16 in itsfirst version to addressline
of sight access at spectrum which ranges from 10 GHz to 66
GHz.. It can provide data rate upto 1 Gbps for a fixed station
considering the updates. It is a connection-oriented wide
area network and can potentially provide broadband access
to remote places. It also uses point-to-multipoint (P2MP)
architecture. Its delivers broadband seamless quality
multimedia services to end users. A WiMAX base-stationcan
cover almost 3,000 square miles which is a large area.
The IEEE 802.16d standard provides four categories for the
prioritization of traffic:
 Unsolicited Grant Service
 Real-Time Polling Service
 Non-Real Time Polling Service
 Best Effort
Each of these service classes has its own advantage helping
in prioritizing traffic.
1. Unsolicited Grant Service: This supports real-time
constant bit-rate (CBR) data flows. Data packets of fixed size
will be accepted by the BS at periodic intervals and
guarantees for bandwidth and access delay with firm.
Unsolicited Grant Service is suitable for applications which
require a constant bandwidth and limited delay variation.
2. Real-Time Polling Service: This also supports real-time
applications, but offers variable bit-rate and less stringent
delay or jitter requirements. The BS also provides
transmission opportunitiesto each SS periodicallythrougha
basic polling mechanism. E.g. video conferencing, video
streaming.
3. Non-Real-Time Polling Service: It is used for non-real-
time applications which requires better than best effort
service in terms of bandwidth, but they are not delay
sensitive. Examples are file transfer, database applications
etc.,
4. Best Effort: Service is provided for the best effort
applications with possess elastic traffic like email, web
browsing, telnet. There is no guarantee in terms of
bandwidth delay or request accessthat are offeredbytheBS.
This service has lowest priority
WIMAX FEATURES:
 It uses wireless link with microwave or millimeter
waves.
 It uses licensed spectrum
 It provides public network service to fee-paying
customers
 It uses point-to-multipoint (P2MP) architecture
 It uses Simple stationary rooftop ortower-mounted
 Antennas are used to provide broadband
2.1.5 The IEEE 802.11ad:
802.11ad, also called WiGig 1.0, is a proposed particular in
the 802.11 family appropriate to WLANs (remote
neighborhood). 802.11ad speaks to an expansion or refresh
of the current 802.11a standard.
Systems utilizing 802.11ad will work in the 60-GHz
(gigahertz) band utilizing OFDM (Orthogonal Frequency
Division Multiplexing). The upgrades upheld by 802.11ad
will encourage concurrent spilling of HD (topnotch)videoto
different customers in vast office conditions, and also faster
remote synchronization and reinforcement of expansive
records.
New highlights that will exist in 802.11ad, far beyond those
proposed for 802.11ac (another improvement to 802.11a),
include: Local 802.11a/b/g/n/ac support. Consistent
exchanging between 2.4, 5, and 60-GHz groups. Channel
width up to 2160 MHz (megahertz). Throughput of up to 7
Gbps (gigabits every second). Built in help for wired
connections. Working scope of 10 metersormore.Enhanced
functionality for cell phones. Advanced security Features.
Support for control administration.
Wi-Gig:
The Wi-Fi Alliance has started testing 802.11ad for
interoperability, yet nobody knows how the standard is
received. Since the start of the Wi-Fi fever, merchants have
showcased each new customer get to innovation from
802.11b completely through the most recent802.11acWave
2 Standard.. WiGig is great, but it doesn’t replace Wi-Fi
network. We might think that WiGig is far better than Wi-Fi,
In the word “gig” it soundsfaster, because it is.However,The
Idea is to have Wi-Fi for broadband connections and Wi-Gig
to wirelessly interconnect home entertainmentdevicessuch
as PCs, tablets, Pods and so on. Wi-Gig is a kind of wireless
HDMI.
Wi-Gig is fast. Wi-Gig operates in the uncluttered 60GHz
frequency range and guarantees data transfer rates up to
7Gbps. In the Real-world throughput will be little bit slower,
but theoretically using different modulation and beam

forming techniques Wi-Gig can yield speeds of 25Gbps. Wi-
Gig can act as a connection layer for devices that can be
interconnected via USB, Display Port and HDMI. Selected
devices have the correct radiosinstalled,itcanbebackwards
compatible with 802.11 Wi-Fi connections inthe2.4GHzand
5GHz frequency ranges.
Wi-Gig is efficient. Wi-Gig was designed as a lower power
technology, and claimsto be five times more energy efficient
when compared to Wi-Fi. Wi-Gig Uses “Beamforming”
technique for best performance, reducing congestion and
efficiently pointing the radio signal to the destination. The
Wi-Gig Alliance says that beamforming will empowerhearty
associations past 10 meter extend; there is a great deal of
distinction between strong and speedy. Wi-Gig needs to
interface with everything. It's simply not interconnecting
home excitement gadgets through HDMI, USB et cetera.
3. COMPARISION BETWEEN Wi-Fi, WiMAX AND WiGig:
Wi-Fi Wi-MAX Wi-Gig
IEEE Standard 802.11 a, b and g 802.16 802.11 ad
Range 300 meters(or) 100 yards Around 30 miles, cell
radius of 4-6 miles
Around 10-15 meters
Throughput 11Mbps 72Mbps 7Gbps
Scalability
It scales from one to few
tens with one subscriber
for each (CPE), scalability
of 20MHz fixed channel
width.
It supports one to few
hundreds of Consumer
Premises Equipment
(CPE)s, channel is flexible
and range varies
from1.5MHz to 20MHz.
It supports one to few
thousands of Consumer
Premises Equipment(CPE),
channel has bandwidth of
60MHz.
Bit Rate
2.7bps/Hz in a fixed
channel width of 20MHz.
5bps/Hz to 100Mbps/Hz
in 20MHz channel.
Upto 7Gbpsin 60GHzISMband.
QoS
It may not have any
Quality of Service (QoS), It
does not provide
ubiquitous broadband.
The Quality of Service
(QoS) is good such that itis
used for Dynamic
bandwidth allocation, It
provides ubiquitous
broadband.
It supports high-performance
wireless implementations of
HDMI, Display Port and USB.
Security
Mechanism
Its Security mechanism is
limited and it is of Wired
Equivalent Privacy (WEP)
mechanism and pre-
shared key.
Its Security mechanism is
of Multi-level encryption
consists of Extensible
Authentication Protocol
(EAP)-based
authentication, Advanced
Encryption Standard
(AES), Privacy Key
Management (PKM).
It uses Advanced Securityusing
Galois/Counter mode of AES
Encryption Algorithm.
Modulation
a-OFDM, b-DSSS, g-
OFDM,DSSS
Adaptive Modulation and
Scalable OFDMA
SC,OFDM,MCS
Advanced Antenna
Technology
N/A MIMO antenna technology Beamforming technology
Band
Communications
It operates in 2.4GHz and
5.8GHz
It operates in 3.2-3.8GHz It operatesin 2.4GHz,5GHz and
60GHz
Wi-Gig isn't a restrictive standard. It Comes from the
Wireless Gigabit Alliance. Wi-Gig is one of the few
contending norms. There are a few measures wantingtoend
up remote equivalent of HDMI: WiGig, WiDi and Wireless
HD. WiGig is going to be the official 60GHzwirelessstandard.
The official IEEE standard for 60GHz wireless
communications is 802.11ad, and while it was originally
separate from WiGig the WiGig Alliance has been working
with the IEEE on standardization. Ultimately we're likely to
use WiGig to mean 802.11ad and vice-versa. Not all Wi-Gig
equipment are compatible with Wi-Fi networks, which
would create a confusion for the Wi-Fi brand.

4. CONCLUSION
In this comparative review we conclude that each of these
wireless network have their unique importance in a
particular field. The quality of WiMax lie in its capacity to
address the necessities of present day media transmission
systems and the dedication that has been appeared to its
advancement and wide acknowledgment by number of
driving hardware sellersand administrationsuppliers.While
finishing up the outcomes on Wi-fi there are genuine and
quantifiable advantagesof utilizing remote systemsversesa
standard wired system. Most prominent advantage is that
there are no wires required. Wi-fi is now the widely used
wireless network although Wi-MAX and WiGig are far better
in many aspects, their usage in the current technological
world is far behind than that of Wi-Fi. The range ofWiMAXis
high as this is a macro cellular network whereas the Wi-Fi
and WiGig comes under small cell network. Throughput,
Scalability, Bit Rate, Quality of Service, Security Mechanism,
Modulation, Advanced Antenna Technology, Band
Communications are sophisticated in the case ofWiMAXand
WiGig which are needed in this day-to-day advancement of
technology. Though providing higher data rates andusageof
advanced techniques in communication, range is always
considered as one of the important factors when it comes to
wide range implementation of these wireless
networks.WiGig has limitations that restrict it more uses
than traditional Wi-Fi. Connection speed dropsaccording to
distance between the devices. Wi-Gig’srangeismuchshorter
when compared to Wi-Fi’s.As the users on wireless are
generally high when it is brought to large scale usage of
network, cost of installation of stations is also a very
important factor. Hence, further development of
specifications of the drawbacks of these networks will be a
great use for the development of wireless networks in the
future.
ACKNOWLEDGEMENT
This project would be incomplete without the mention of
people whose ceaseless cooperation made it possible,whose
constant guidance and encouragement crownsalleffortwith
success. We are grateful to Dr. Manikandan K and all the
faculty members of CSE Department, Vellore Institute of
Technology for their guidance, inspiration and constructive
suggestions that helped us in the preparation of this
report.We thank all our colleagues and friends who helped
us and inspired us to do this report.
REFERENCES
[1] Gerard Smyth, “Wireless Technologies and e-
Learning: Bridging the Digital Divide”, Intel
Corporation, December 2006
[2] P. Yegani, “WiMAX Overview,”IETF-64 Nov. 7,
Vancouver, Canada, 2005.
[3] SourangsuBanerji, Rahul Singha Chowdhury,“Wi-Fi
&WiMAX: A Comparative Study” Indian Journal of
Engineering, Vol.2, Issue. 5, 2013.
[4] “IEEE 802.11ad,” IEEE 802.11 Amendment 3:
Enhancements for Very High Throughput in the 60
GHz Band, 2012.
[5] Comparison of Wimax and Wi-Fi: A Review Amit
Sondhi, Sangeeta Monga April. 2014
[6] Multiband Antenna for WiFi and WiGig
Communications Dian Wang, Student Member, IEEE,
and Chi Hou Chan, Fellow, IEEE 2016.

IRJET- Wi-Fi, WiMAX & WiGig: A Comparative Study

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IRJET- Wi-Fi, WiMAX & WiGig: A Comparative Study