Presentation on WIGIG

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24 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Presentation on WIGIG

Submitted to.


Dr
Shahedur

Rahman


CCM 4300

Group Members &
Responsibilities


Shashank

Singh


Motivation


Jose A.
S
inti


Implementation


Naveen

MadanPotra


Challenges

Introduction



The
Wireless Gigabit (
WiGig
) Alliance
was formed to meet this need by
establishing a unified specification for wireless communication at multi
-
gigabit speeds; this specification is designed to drive a global ecosystem of
interoperable products.


The
WiGig

MAC and PHY Specification enables data rates up to 7
Gbps
,
more than 10 times the speed of the fastest Wi
-
Fi networks based on IEEE
802.11n. It operates in the unlicensed 60 GHz frequency band, which has
much more spectrum available than the 2.4 GHz and 5 GHz bands used by
existing Wi
-
Fi products. This allows wider channels that support faster
transmission speeds.


The
WiGig

specification is based on the existing IEEE 802.11 standard,
which is at the core of hundreds of millions of Wi
-
Fi products deployed
worldwide.

Motivation

SHASHANK SINGH

M00427909

WiGig

and IEEE 802.11ad


IEEE 802.11ad is an amendment to the 802.11 standard that enables
multi
-
gigabit wireless communications in the 60 GHz band. The
WiGig

specification was contributed to the IEEE 802.11ad standardization
process, and was confirmed in May 2010 as the basis for the 802.11ad
draft standard.


Structure


The
WiGig

specification defines
Physical (PHY) and Medium Access
Control (MAC) layers and is based on
IEEE 802.11. This enables native
support for IP networking over 60
GHz.


It also makes it simpler and less
expensive to produce devices that can
communicate over both
WiGig

and
existing Wi
-
Fi using tri
-
band radios
(2.4 GHz,5 GHz and 60 GHz).


Physical Layer (PHY)


Worldwide, the 60 GHz band has much more spectrum available than the 2.4 GHz and 5 GHz
bands


typically 7 GHz of spectrum, compared with 83.5 MHz in the 2.4 GHz band.


This spectrum is divided into multiple channels, as in the 2.4 GHz and 5 GHz bands. Because
the 60 GHz band has much more spectrum available, the channels are much wider, enabling
multi
-
gigabit data rates. The
WiGig

specification defines four channels, each 2.16 GHz wide


50 times wider than the channels available in 802.11n.


Medium Access Control (MAC) Layer


The MAC layer of the
WiGig

specification includes new features that support
advanced usage models, facilitate integration with Wi
-
Fi networks, reduce power
consumption and provide strong security.



The
WiGig

Alliance is also defining Protocol Adaptation Layers (PALs) that
support specific data and display standards over 60 GHz.



PALs allow wireless implementations of these standard interfaces that run
directly on the
WiGig

MAC and PHY, and can be implemented in hardware. The
initial PALs are audio
-
visual (A/V), which defines support for HDMI and
DisplayPort
, and input
-
output (I/O), which defines support for USB and
PCIe
.

Protocol adaptation layers (PALs)


The specification supports two types of modulation and coding schemes, which
provide different benefits:


Orthogonal frequency
-
division multiplexing (OFDM)
supports communication over
longer distances with greater delay spreads, providing more flexibility in handling
obstacles and reflected signals. Furthermore, OFDM allows the greatest
transmission speeds of up to 7
Gbps
.


Single carrier (SC)
typically results in lower power consumption, so it is often a
better fit for small, low
-
power handheld devices. SC supports transmission speeds
up to 4.6
Gbps
.


Modulation & Coding Scheme (MCS)

Worldwide spectrum availability in the 60 GHz

band used by
WiGig


WIGIg Implementation

2013, the year of
WIGig

(IEEE 802.11ad)


Jose
Sinti

M00283362

WIGIg

field

Desktops


Laptops


Projectors
-

TVs


60Ghz works in a short range. Initial developments are for
short networks (i.e. Home networks, Audio and Video
devices also for SMB)



Companies collaborating with design and product
developments for
WIGIg

are:


-
Wilocity and Qualcomm

-
Wireless Gigabit Alliance

-
VESA (Video Electronics Standards Association)

Wilocity

and Qualcomm


Tri
-
band Wireless card


Wireless docking station

-

USB extension

-

PCIe

extension

-

Video extension profile




Wilocity and Qualcomm
teamed with Dell



the new
PCIe
-
mini card
found in the Dell 6430u

-
WIFI
-
n

-
BT4.0

-
WIGIg



(Networking and PCI extension
on the same board)



Concerns!!!


-
Thickness of of the laptops increase
because of the size of the card

-
Add 2.5 watts, draining 7
-
10% of
more battery

-
Not roaming

-
Short range


WIGIg

Beamforming



Because

of

the

propagation

loss

which

is

higher

than

in

the

2
.
4

and

5
GHz

Beamforming

is

an

alternative

for

implementation

of

the

60
GHz



Beamforming

focus

on

directed

antennas

used

to

form

a

“Beam”

that

allows

communication

further

10

meters



Beamforming

also

provides

the

flexibility

of

connecting

using

a

new

pathway

if

the

connection

is

obstructed,

this

pathway

could

be

a

reflection

of

the

signal

on

the

wall

Wireless Gigabit Alliance


Organization promoting the adoption of multi
-
gigabit speed
wireless communication over 60Ghz



Working on wireless data for video and audio applications,
particularly WDE (
WIGIg

Display Extension)



-

WDE supports wireless transmission of audio/visual data



-

Enables high
-
bandwidth for wireless display ports



-

Enables lossless compressed A/V from PC or Camera to
HDTV Monitor or Projector



High
-
performance high
-
quality H.264 video encoding and decoding

It

provides ultra low latency

HDCP 2.1 Provides encryption and decryption for content protection

Parsing and Packetization of audio and video data, and end
-
to
-
end
WDE stream to display conversations

VESA Collaboration


Video Electronics Standards Association builds partnership
with Wireless Gigabit Alliance to build certification
standard


Benefits of the this partnership:


-

Interoperability of display port standard and
WIGIg


-

Standard to seamless connection of A/V (Wirelessly)


-

High
-
definition standard wireless display through built
-
in or
WIGIg

docking station




By 2014
WIGIg

technology will be present in 89.5% of
commercial desktops and 95% of laptops (According to
analyst firm IDS)

CHALENGES IN THE
IMPLEMENTATION OF
WiGig

Naveen Madanpotra

M00429710

Challenges



Challenges in PHY Layer



Challenges in MAC Layer



Challenges in App layer



Wireless Gigabit Protocols

Challenges in PHY Layer

1.
Radio Frequency Challenge:



Radio frequency devices are the fundamental challenge for the
communication circuit in mm
-
wave home network.


The existing candidates of Radio frequency Technologies are
GaAs
(Gallium Arsenide),
SiGe
( Silicon Germanium), CMOS(
Complementary Metal Oxide Semiconductor).


In particular,
GaAs

has a higher saturated electron velocity &
higher electron mobility, which allows
GaAs

devices to work
properly at frequencies even in access of 250GHz.


Moreover,
GaAs

devices yield less noise then the silicon devices
when operated at higher frequencies.


But the main problem with
GaAs

is that it is very costly to
implement devices with these technology. which is not desired by
the users.




Another technology is
SiGe
, the problem with this technology is that it can not
work efficiently at higher frequency. So, Devices made by this technology are not
acceptable by our network.


Although the last technology CMOS is being very popular for mm
-

wave devices ,
because it reduces the power consumption and system
-
cost , which was the basic
drawback of other technologies. But, the problem doesn’t ends here.


The main problem in mm
-
wave devices in CMOS technology is the absence of CAD
tool and accurate models for various active & passive building blocks of the RF
circuitry.

2.
Directional Transmission:
Bridging 60GHz Wireless Link


Another challenge for mm
-
wave
Gbps

communication is the poor link budget,
because when a radio signal propagates in mm
-
wave frequency band then it
results path loss, reflection loss, multipath etc.


Moreover, NLOS (Non line Of Sight) propagation makes it even more poorer in
many cases.


As a result, it is extremely difficult to get a communication in 60GHz Band.
However to overcome this situation “Directional antennas” can be used, but these
antennas suffers from poor flexibility.


Challenges in MAC Layer


MAC layer plays a critical role in moderating the access right
to the shared wireless channel in 60GHz wireless.


Device discovery becomes a challenging task in 60GHz
wireless networks, this is because of the use of directional
transmission. In the case when a new device joins the
network without any prior information of location then the
transmitter needs to transmit in all directions.


The hidden terminal problem is also generated in 60GHz
wireless communication, in which devices can be hidden from
each other not only because of distance separation, but also
because of directional difference.

Challenges in APP Layer


High data rates allows the transmission of uncompressed audio &
video over the wireless media. Therefore content protection is most
required by content providers.


One challenge for the content protection is the cipher speed for
such high throughput.


Two types of cipher technique is considered such as: Stream cipher
& Block Cipher.


Stream cipher have high speed & is easy to implement, whereas,
Block stream have a stronger encryption strength but with slow
speed.


In process to meet the high speed encryption requirement, parallel
cipher is considered, where several ciphers processes the data in
parallel.

Conclusion


This

work

concludes

that

WIGIg

is

a

short

range

wireless

network

which

uses

60
GHz

band

to

provide

connectivity
.

With

the

expansion

of

spectrum

band

the

strategies

to

implement

network

have

to

be

changed
.

The

usage

of

the

WIGIg

devices

depends

on

the

application

planned

to

be

used

to

allow

maximum

performance,

and

no

drawback
.

Audio

and

video

data

transmission

is

going

to

be

the

main

benefit

of

WIGIg

because

it’s

already

used

in

short

range

environment

(i
.
e
.

to

project

a

video)
.