guided by: mr. s v.rao assistant professor department of electronics

8/14/2019 Guided by: Mr. S v.rao Assistant Professor Department of Electronics

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Dept of Electronics and Communication, MBCET

Guided By:

Mr. S V.Rao

Assistant Professor

Department Of Electronicsand Communication , MBCET

Presented By:

Subin Abraham Mathew

Roll No : 51

S7 ECREG:05408033

Department Of Electronics and

Communication , MBCET


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Communication


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Internet


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Taking Wireless To Max


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WWAN

802.20 (proposed)

MAN70 Mbps

~50 Km

802.16a/e

WiMAXNew standard for

Fixed broadbandWireless.

WLAN11-54 Mbps

~100m

802.11a/b/g

Wi-Fi

Includes 802.11a/b/g.Products must beApproved forInteroperability by theWi-Fi Alliance. PAN

~1.5 Mbps


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The NeedThe Technology

The Wireless AspectModulation and CodingThe Applications and Topologies

India ConnectedCompeting TechnologiesConclusion

An Overview


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The Need


IMS : IP Multimedia SubsystemTotal ConnectivityBandwidth LimitationCostSpeed of Data Transfer

Last Mile Network


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Dept of Electronics and Communication,MBCET

The Technology


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Challenges for WiMAX


Problem Explanation

Non Line of Sight Coverage Interference, Multi-path fading

High Data Rate and Capacity Overcoming Intersymbol interface

Quality of Service Quadruple Play

Mobility Seamless Mobility

Portability Battery Life

Security Privacy

Low Cost Efficient & Reliable through IPArchitecture


10/27Dept of Electronics and Communication, MBCET

The Wireless Aspect



Line-of-sight serviceA fixed dish antenna points straight

at the WiMAX tower from a rooftop

or pole.

66 GHz frequency rangeHigher frequencies, there is less

interference and lots more

bandwidth30-mile radius



Non-line-of-sightA small antenna onyour computer

connects to the tower2 GHz to 11 GHz

frequency range

Limited to a 4-to-6

mile radius


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CODING AND MODULATION


OFDM TRANSMITTER

OFDM RECIEVER


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OFDM and OFDMA


Orthogonal Frequency-Division Multiplexing

Single User

Orthogonal Frequency-Division Multiple Access

Multiple User


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Architecture


IEEE 802.16 Defines the 4 layered Architecture shown

Point to Multi Point

Mesh Architecture

IP, ATM

Packing, Fragmenting

Authentication, Key Exchange

OFDM, Power Management


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WiMAX

Applications


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Wi-Fi


LAN 802.11g Wi-Fi

Out of Range


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WiMAX Mesh System



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India Connected


Nov 2007: India unveiled its plans for 3G spectrum auctionoutlined WiMAX rollout plans 2.3 and 3.3Ghz

Indian Market : Large, Developing and Cheap

Deployed Stations:Bangalore

Pune

Mumbai

Ahmadabad

Services Provided By:Bharathi

Reliance

BSNL

Tata


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Competing Technologies


TechnologySer vices

EVDO3GPP2

HSPA3GPP

Wi-Fi802.11

WiMAX802.16a ,16e

Band Width 1.25 MHz 5 MHz 20 MHz 1.5-20 MHz

Download3.1 or 4.9 Mbps 14Mbps 54Mbps-100Mbps 9.4 Mbps

Upload 1.2 Mbps 1.4Mbps 20Mbps 3.3, 6.5 Mbps

Modulation QPSK, 8PSK, 16QAM

QPSK16QAM

BPSK,QPSK16QAM

QPSK, 16 QAM,64 QAM

MultipleAccess

TDMCDMA

TDDCDMA

CSMA TDMOFDMA

Range 1-3Miles 1-3Miles 100 Ft -1000Ft 3-5 Miles

Mobility High High Low Medium


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Salient Features of WiMAXOFDM based Physical Layer

Very High Peak Data Rates 10 Mbps at 10 kmSupport TDD and FDDOFDMA Method UsedRobust SecuritySupport for MobilityIP-Based ArchitectureStandardized Network

Conclusion



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Challenges for WiMAX Overcome


Problem Solution

Non Line of Sight Coverage Channel Diversity, Coding

High Data Rate and Capacity OFDM , Adaptive Antennas

Quality of Service Complex MAC layer, IPconvergence

Mobility Seamless Handover, IP BasedNetwork

Portability Power Efficient Modulation,

Sleep Wake modes

Security Encryption, Authentication,Access control

Low Cost IP based protocol and LargeConsumer Service


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References


[1] WiMAX Forum

[2] IEEE 802.16 Working Group

[3] Fundamentals of WiMAXJ. Andrews, A. Ghosh, R. Muhamed -Prentice Hall

Edition 1

[4] http://www.intel.com/technology/wimax

[5] Mobile WiMAX PHY Layer Operation and ManagementAgilent Technologies

[6] Wikipedia http://en.wikipedia.org/wiki/Wimax[7] Wimax.com www.wimax.com/education/wimax/


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MAC LAYERPoint-to-multipoint (PMP) with (CSMA/CA).Privacy key management (PKM) for MAC layer security

,Extensible authentication protocol (EAP).

Broadcast and multicast support.Manageability primitives.

High-speed handover and mobility management primitives.

Three power management levels, normal operation, sleep andidle.

Five service classes, unsolicited grant service (UGS), real-timepolling service (rtPS), non-real-time polling service (nrtPS),best effort (BE) and Extended real-time variable rate (ERT-VR)service.


guided by: mr. s v.rao assistant professor department of electronics

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