Study On Multicarrier Wireless Information Local Loop Computer Science Essay

McWiLL is the most advanced broadband radio solution provided by Beijing Xinwei Telecommunications Technology. The engineering is based on SCDMA, and is known as Multicarrier Wireless information Local Loop ( McWiLL ) . McWiLL combines SCDMA ‘s traditional usage in narrow-band voice and introduces a nomadic broadband informations service that ties into an IP-based nucleus web. It is based on CS-OFDMA adaptative transition, and uses dynamic channel allotment and smart aerials to heighten its throughput.

SCDMA is a wireless entree engineering developed by Beijing Xinwei

Telecom Technology Co. , Ltd. The SCDMA air interface is a national radio entree criterion in China. The SCDMA merchandises contains a full suite of advanced radio

communicating and networking engineerings, such as smart aerial. The cardinal engineerings of SCDMA form the foundation of TD-SCDMA, an ITU Standard for 3G Wireless Communications. Earlier SCDMA merchandises are narrowband merchandises concentrating on fixed and nomadic voice applications. A new coevals of SCDMA merchandises are broadband merchandises, Multicarrier Wireless Internet Local Loop ( McWiLL ) , concentrating on fixed and nomadic voice and high velocity informations application.

McWiLL has been deployed in several Chinese metropoliss, including Guangzhou and Qingdao, where it ‘s been used for picture, voice and informations communicating. McWiLL successfully served for 2008 Beijing Olympic Regatta, supplying the high-definition, real-time Mobile picture services. Internationally it has been deployed in more than 15 states, such as USA, Cameroon, Nigeria, Ukraine, Malawi, and Mozambique.

McWiLL is a TDD-based radio entree platform that combines SCDMA ( synchronal CDMA ) , CS-OFDM ( codification distributing extraneous frequence division multiple entree ) , MIMO and smart aerial, every bit good as other radio techniques such as adaptative transition ( up to QAM64 ) , dynamic channel allotment and make-before-break handoff, to offer a high-velocity information and voice services. All these characteristics are designed to work with any IP nucleus web and supply up to 15Mbps of informations rate utilizing 5MHz of spectrum.

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In a manner, McWiLL tries to integrate all of today ‘s radio networking techniques into a individual platform which is really perchance why it is about impossible for a normal human to understand.

McWiLL Base Station supports the undermentioned characteristics:

( a ) Support up to 15Mbps cyberspace throughput with 5MHz bandwidth ;

( B ) Support fixed and nomadic, voice and informations services ;

( degree Celsius ) Support up to 163dB nexus budget ;

( vitamin D ) Support Make-before-Break handoff and L2 tunnel ;

( vitamin E ) Support QoS and GoS characteristics ;

( degree Fahrenheit ) Support Over-the-Air ascent ;

( g ) Support low power ingestion ( 150 Watt ) ;

( vitamin E ) Support VLAN, PPPoE and incursion of private webs

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McWill ( Multi-carrier Wireless Information Local Loop ) is a nomadic broadband entree system based on SCDMA engineering platform.

McWiLL Technology

Smart Antennas

Dynamic Channel Assignment

Code Spread OFDMA ( CS-OFDMA )

Time Division Duplex ( TDD )

Efficient VoIP Technology

Make-before-Break Baton Handoff

Adaptive Transition

QoS & A ; GoS

Security & A ; Fraud Protection

McWiLL System Features

Main Servicesi?sFixed, portable, nomadic voice and informations communications.

Main Featuresi?sBTS with 5MHz can back up up to 15Mbps cyberspace throughput, each sector can back up more than 300 coincident Sessionss, back uping high-velocity mobility, handoff and roaming, N=1 frequence planning, and low latency.

Merchandise Features:

Support up to 100KM/H Mobiles velocity

Terminals are rearward compatible

Support efficient voice communications and low-bandwidth informations.

Support N=1×1 deployment.

Merchandises available in the undermentioned frequences:

336-344MHz, 400-430MHz, 698-746MHz,1785MHz-1805MHz, 2150-2180MHz, 2525-2560MHz, 3300-3400MHz

Features of Chinese Rural Areas


Low endorser denseness, big separation of small towns, far off from urban countries

Complicated environment ( cragged and hilly terrain )

Poor installation ( backhaul, power supply, etc. )

Low income

Current wireline/wireless communicating systems can non run into these challenges


Less than $ 4/month in most countries

Busty traffic

High traffic particularly in Chinese traditional vacations

Asymmetric traffic

More incoming calls than surpassing calls

Small use of value added services

Unique Advantages of Deploying McWiLL

Large coverage enables fewer cell sites which are expensive in developing states, taking to much lower Capex and Opex. N=1 deployment enables a broad country web with every bit small as 5MHz spectrum, taking to much lower upfront investing on spectrum which is normally rather expensive. Merchandises with a broad scope of frequence allow an operator to take the most cost effectual spectrum to run. Lower terminus cost and equal informations rates allow an operator to minimise the Opex and lower the entry barriers for a endorser. Most McWiLL terminuss can back up both voice and information services. GSM/McWiLL double manner handsets/PDAs allow an terminal user to bask 3G beyond public presentation of McWiLL informations and cost effectual voice without giving easy entree advantages of GSM.

Summary of McWiLL Advantages

Large coverage ( up to 60Km )

Smart antenna,400MHz frequence set

Low cost

Already big volume, cost effectual architecture, SCDMA ASIC chipset, no royalty fees, low R & A ; D cost, low industry cost, multiple sellers due to SCDMA Alliance

High capacity

BTS capacity 24Mbps/10MHzi??supporting up to 8,000 voice endorsers

One system fits all

Via flexible constellation, one system can run into the demands of different user groups ( high-end and low-end ) , services ( voice and information ) , and clip ( current and future ) .

Product adulthood and dependability

10 old ages R & A ; D, big graduated table deployment, redundancy architecture, long clip operational webs, an experient squad of installing and client support.

Easy to put in and maintenance

Terminal zero install, easy-to-use tools for client ego debugging, distant entree problem shot tools for support forces.


In this presentation, we will foremost give an debut of popular

radio manifold engineerings such as WCDMA and OFDMA and so show

our McWiLL engineering which is an optimum integrating of WCDMA and OFDMA

engineerings to efficaciously turn to the proficient challenges of radio

broadband entree, such as capacity, coverage, multipath attenuation, and

intercell intervention. In other words, McWiLL efficaciously avoids the

major drawbacks of WCDMA and OFDMA and pull their advantages of both

engineerings. Unlike voice centric WCDMA or informations centric OFDMA ( WiMax ) ,

the McWiLL radio broadband entree system can expeditiously unite

both voice and information applications. Finally, we will supply brief

debut of McWiLL merchandise roadmap and application.

McWiLL Fits Chinese Rural Markets

aˆ? Smart aerial and 400MHz frequence set allows the McWiLL systems to hold

big NLOS coverage ( up to 60KM ) .

aˆ? Multicarrier BTS can back up up to 8,000 voice endorsers holding sufficiently high

capacity to back up bursty traffic in rural applications.

aˆ? Cost effectual architecture and SCDMA ASICs allow the McWiLL merchandises to hold

sufficiently low cost per line ( $ 60-80 overall cost per line including both terminus and

substructure ) .

aˆ? Zero install of McWiLL terminuss and rich tools for ego and remote trouble-shooting

do it really easy to deploy the McWiLL systems in rural countries.

aˆ? 10 old ages R & A ; D, redundancy architecture and large-scale deployment ( & gt ; 2 million

endorsers ) make the McWiLL merchandises mature and dependable plenty to deploy in

distant rural countries.

aˆ? Incorporate voice and informations solutions can let the McWiLL systems to run into both

current and future service demands of rural clients.

My sentiment

Multicarrier Wireless Internet Local Loop ( McWill ) is developed by Beijing Xinwei Telecom Technology Co. , Ltd. It is a wireless entree engineering which can cover for the really big country, its coverage can up to 60KM. Therefore it is really suited for China because it is a large state. It ‘s been used for picture, voice and informations communicating and successfully served for 2008 Beijing Olympic. Even though McWill is really popular but it can non be usage for every state for illustration, Singapore. Singapore is a little state if utilizing the engineering of McWill, there will be a batch of wasted.