Wateen Presentation On Wimax

WIMAX

Wateen Telecom

0-04-2008

What is Wimax? Wimax is Worldwide interoperability for microwave access. Wimax is IEEE 802.16 standard based technology. IEEE 802.16 is a standard and does not identify the types of services that it can support. Services and data speeds are defined by the service provider. What WiMAX does is provide the ability to seamlessly offer any type of service over a large metropolitan area. Typically these services include voice over IP (VOIP), data, and streaming video.

• Enables delivery of ‘last mile’ wireless broadband access • An alternative to wired broadband services like Cable, DSL • Targets two types of user markets: Fixed and Mobile

World wide subscriber growth for mobile telephony, internet usage and broadband access

WORKING Line of Sight (LOS)  Antenna & WiMAX tower in line     

Stronger & more reliable Supports very high data rates Frequencies reaching up to 66GHz Less interference & lot of bandwidth LOS for Backhauling always

Non Line of Sight (NLOS)  Antennas not in line     

Small size antennas Indoor & outdoor installed CPEs Low frequency range, 2 – 11 GHz Less disruption at lower freq. Low data rates as compared to NLOS

Mobile WiMAX Salient Features Scalability

Support for operation in different frequency bands and Channelizations. Flexible frequency planning; Macro, Micro, Pico cell support

High Data Rates

OFDM to support higher PHY rates, Larger MAC frames with low overhead, Advanced FEC, Adaptive modulation, H-ARQ, MIMO and Beamforming support

QoS

Traffic types, QoS with Service Flows, Advanced Scheduling Framework, Adaptive Modulation & Coding, ARQ, H-ARQ

Mobility

Secure Optimized Hard Handover, Fast BS Switching Handover, Power Management with Sleep and Idle modes

Security

EAP authentication, Encryption with AES-CCM, CMAC Authentication mode, X.509 Certificates, Key Binding, Device and User authentication capability

IEEE 802.16

IEEE 802.16a/ Rev’d

IEEE 802.16e

Completed

December 2001

May 2004

Est. Mid-2005

Spectrum

10 - 66 GHz

2 – 11 GHz

2 - 6GHz

Application

Backhaul

Wireless DSL and Backhaul

Mobile Internet

Channel Conditions

Line of Sight Only

Non-Line of Sight

Non-Line of Sight

Bit Rate

32 – 134 Mbps at 28 MHz Channelization

Up to 75 Mbps at 20 MHz Channelization

Up to 15 Mbps at 5 MHz Channelization

Modulation

QPSK,16QAM and 64QAM

OFDM 256,OFDMA 2048 QPSK,16QAM,64QAM

Same as 802.16d,Scalable OFDMA

Channel Bandwiths

20,25 and 28 MHz

Selectable Channel Bandwidths Between 1.5 and 20 MHZ

Same as 802.16d

Standard

Type of network

IEEE 802.11

Wireless LAN

IEEE 802.15

Wireless PAN

IEEE 802.16

Wireless MAN

Industry Group

Formation of WiMAX Forum IEEE developed the technical specs for the 802.16 standard, but left the task for the industry to evolve it into a certifiable and interoperable solution

and thus, WiMAX Forum was founded … in June 2001

WiMAX Forum A non profitable organization comprised of

 • • •

Broadband Wireless Equipment Manufactures Telecom System Integrators Component Suppliers (Silicon, RF, Antenna, Software) Service Providers (DSL Operators, WISPs) Their Charter

• • •

To certify equipments that conform to the IEEE 802.16 Facilitate the development of WiMAX network Develop process to certify compatibility and interoperability of wireless products

• •

Over 200 hundred members of the forum 36 membership processing

Some WiMAX Forum member Companies:

Presently, more than 520 companies are member of the WiMAX Forum

Mobile WiMAX vs 3G Cellular Technologies

 WiMAX is designed for broadband services; mobility is an add-on  Cellular tech. are designed for mobility; broadband is add-on feature

Mobile WiMAX has some advantages: Multipath tolerance (OFDM) Scalable channel bandwidth Well-refined QoS Advanced Antenna Technology support

2x2 MIMO, 10MHz channel

Where does WiMAX stand among other wireless technologeis? Poor CSMA based MAC results in much lower throughputs

Data rates of various cellular and mobile technologies:

WIMAX NETWORK MODEL The network reference model envisions a unified network architecture for supporting fixed, nomadic, and mobile deployments and is based on an IP service model. The overall network may be logically divided into three parts:

1-Mobile Stations (MS) used by the end user to access the network 2-The access service network (ASN), which comprises one or more base stations and one or more ASN gateways that form the radio access network at the edge 3-Connectivity service network (CSN), which provides IP connectivity and all the IP core network functions.

R2

R3

R1 MSS

ASN

CSN

R4

Another ASN

NAP

NSP

ASP Netw ork OR Internet

ASN

R3 R6

R1 BS

ASN GW

R4 R8

BS

CSN and ASN support the delivery and authentication of mobile Wimax subscribers. ASN Gateway sits between Radio and IP network. ASN Gateway is not a simple router as it have a lot of functionalities. The ASN gateway typically acts as a layer 2 traffic aggregation point within an ASN. R6 interface is very important as it connects the BS and ASN Gateway. The CSN is responsible for IP address management, support for roaming between different NSPs, location management between ASNs, and mobility and roaming between ASNs.

WiMAX Layer Architecture

Access point

User

Frequency division Duplex

Time Division Duplex

Modulation Scheme  WiMAX employs Adaptive Modulation  Modulation is selected according to SNR in a radio link  Highest modulation scheme used when SS is very close to BS, giving higher thru puts i.e. 64 QAM  Lowest modulation scheme used when SS is farthest away from BS, giving lowest thru put but maintain connectivity i.e. BPSK  This allows overcoming time selective fading and makes it possible in NLOS scenario to maintain connectivity & trading off between the range and the data rate  64QAM, 16QAM, QPSK & BPSK modulation schemes are generally employed

Advanced Antenna Technology Adaptive Antenna System (AAS)  Beamforming  Space-Time Coding (STC)  Spacial Multiplexing/MIMO

MIMO Antenna Configuration Use multiple transmit and multiple receive antennas for a single user

User data stream

1

1

2

2

.

channel

User data stream

.

. .

.

. . MT

. . MR

.

Now this system promises enormous data rates!

Key Radio Technology: OFDMA For large bandwidths TDMA and CDMA suffer from inter-symbolinterference in larger cells Large bandwidth = small symbol duration Symbols gets smaller and channel does not change How to combat frequency selective fading? parallel orthogonal flat narrowband channels Orthogonal subcarriers (downlink and uplink), high spectral efficiency Efficient MIMO implementation

OFDMA is a cost-effective technology for Mobile Internet

Quality of Service (QoS)  Grant – request mechanism allocates a small portion of each transmitted frame as a contention slot. SS can enter the network by asking BS for an uplink slot  More robust and reliable as compared to CSMA/CD & CSMA/CA

WATEEN TELECOM Wateen Telecom, Pakistan’s largest communication company in the private sector has become the detrimental catalyst that has rampantly moved forward the country into a digital revolution with its ability to seamlessly connect and enable smarter, faster, cost-effective and flexible communication solutions to reach its valued customers. WAT EEN VISI ON To launch Pakistan into the 21st century digital revolution by providing complete communication solutions to Telecom Operators, Corporate, Consumers and to be the leading “Carriers’ Carrier” by creating a world-class cutting-edge network to deliver a broad range of reliable, affordable and quality customer-centric services.

WAT EEN MISS ION To provide affordable communication services that meets and exceeds customers' requirements. To deliver high-quality, flexible and innovative solutions that are cost effective and conducive. To provide complete customer satisfaction on time, every time. WI MAX M OTO ROL A SO LU TIO N To provide a level of user experience unmatched by any other carrier in Pakistan,Wateen Telecom chose Motorola’s WiMAX and IMS Core technology to provide wireless broadband voice and data services for residential and corporate use. WithMotorola’s global experience and support, Wateen installed its WiMAX network in 22 major cities within just nine months and continue to deploy a network placing Wateen as the premier service provider in Pakistan.In June 2008,Wateen will provide services upto 100 cities in Pakistan.

“In choosing Motorola, Wateen did not only focus on the technology and technical expertise of Motorola, we looked at their capability to deliver an end to end service. ( Shahid Miah, CTO Wateen Telecom, March, 2007.)

Wateen and Motor ola w on N MEI aw ar ds f or tech nol og y innovat io n

At the third annual Network Middle East Innovation Awards held in Dubai on April 2, 2007, Wateen was presented an award for best Wireless Access Network (WAN) implementation as the best example of a success ful wide-area networking project in the Middle East. In addition, Motorola was honored in the Best Telco/Service Provider category for its MOTOwi4 WiMAX technology.

SER VICE S O FFER B Y WA TE EN Wateen Telecom is the first company in the world to roll-out a WiMAX network at a country-wide scale. With Wateen's WiMAX network, you get access to: 

Broadband Internet with up to 2Mbps dedicated speeds



Telephony with over 40 value added features



Fully secure high-speed data networks

Subscribers can use advanced telephony, surf the Internet at superfast speeds, make video calls, and watch IP-TV through the comfort and ease afforded by a single connection

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