Introduction to LTE and 4G WirelessModule 1 MCQ Answers

7/25/2019 Introduction to LTE and 4G WirelessModule 1 MCQ Answers

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Telecoms Academy

INTRODUCTION TO LTE AND

4G WIRELESS


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Global Wireless Market Trends and Evolution

Telecoms Academy 1

SECTION 1

GLOBAL WIRELESS MARkET

TREnDS AnD EVOLUTIOn


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Telecoms Academy 11

Self Assessment Multiple Choice Questions

Factors Inuencing Revenues.....

Q1

What will be the approximate annual growth rate of global mobile subscriptions by 2013?

50% per yeara)

30% per yearb)

10% per yearc)

2% per yeard)

Q2

What will be the most important source of retail revenues for mobile operators globally by

2013?

Voicea)

SMSb)

Non-messaging mobile datac)

Handset salesd)

Q3

Approximately how much of ARPU will be represented by mobile data services by 2013,

on a global basis?

20%a)

30%b)

50%c)

70%d)

Q4

Approximately how much of mobile operators total revenues will be accounted for by

mobile data services in 2013?

One quartera)

One thirdb)

Halfc)Three-quartersd)


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Introduction to LTE and 4G Wireless

Q5

Which element of mobile operators revenue streams is likely represent a signicant

incremental revenue opportunity over the period 2007-2013?

Wholesale services to third partiesa)

Retail voice airtimeb)

Retail data servicesc)

Termination and interconnect revenuesd)


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Telecoms Academy 21

Self Assessment Multiple Choice Questions:

Factors Inuencing Protability.....

Q1

Which region boasts the highest EBITDA levels, as a % of revenue?

Africaa)

Asiab)

Europec)

Americasd)

Q2

Which is the fastest way to maintain EBITDA levels in the short-term?

Increase pricesa)

Implement network-sharing agreementsb)

Cut discretionary costsc)

Promote on-net tariffsd)

Q3

What is the approximate ratio of capital expenditure to revenue among mobile network

operators globally?

Less than 10%a)

Between 10% and 25%b)

More than 25%c)

More than 50%d)

Q4

What is generally considered to be the long-term impact of price wars on operators

revenue levels?

No signicant change to revenue levelsa)

Helps increase revenue over the long-termb)

Signicantly reduces revenue over the long-termc)

Defers the revenue opportunityd)


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Q5

How does the introduction of at-rate tariffs affect mobile operators protability?

Increases protability over the short-terma)

Increases protability over the long-termb)

No signicant change to protabilityc)

Signicantly reduces protability over the long-termd)


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Global Wireless Broadband Market Trends.....

Q1

Which are the fastest-growing mobile broadband markets in the world?

US and Canadaa)

Russia and the CISb)

India and Chinac)

South Korea and Japand)

Q2

On a global basis, which was the predominant Internet access mechanism in 2009?

Fixeda)

Mobile (2G)b)

Portablec)

Smartphonesd)

Q3

What is likely to be the short-term effect on operators protability of offering subsidies on

smartphones and other high-end devices?

Signicant increase in protability due to increased data usagea)

Signicant decline in protabilityb)

No change to protabilityc)

Small decline in protabilityd)

Q4

Where were the rst commercial deployments of LTE scheduled to take place?

2013a)

2012b)

2011c)

2010d)


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Q5

What technology was deployed as a means of achieving high-speed mobile broadband

without the capital expenditure of LTE?

HSUPAa)

HSPA+b)

HSDPAc)

CDMA 1x EV-DO Rev. Bd)


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Telecoms Academy 53

SECTION 1

PRACTICE PAPER


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3G Wireless Systems and Evolution

Telecoms Academy 59

SECTION 2

3G WIRELESS SYSTEMS AND

EVOLUTION


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Mobile Data Revenues and Pricing, a Global View.....

Q1

which of the following accurately states the current trend for technology migration ?

HSPA EV_DOa)

EV_DO HSPAb)

HSPA WiMAXc)

WiMAX EV_DOd)

Q2

Many operators have seen a huge surge in data trafc largely due to ?

free SMSa)

subsidised data devicesb)

at rate data plansc)

longer contract periodsd)

Q3

According to the UK regulator OFCOM, what percentage of mobile broadband data use

takes place in the subscriber home ?

10%a)

50%b)

75%c)

85%d)

Q4

Some operators run both xed and mobile networks, in this case the broadband strategy

that they are most likely to pursue is..

focus on discounted mobile data subscriptionsa)

drive the user toward a FMC (xed mobile convergence) type subscriptionb)

bundled mobile voice and data subscriptionsc)

increased price differential between xed and mobile servicesd)


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Q5

Mobile operators will seek to differentiate their broadband service offerings, which one of

the following may be considered a valid differentiator ?

handset choicea)

operator locationb)

broadband speedc)

customer segmentationd)

Q6

Which one of the following broadband charging tariff models may complicate the service

offer or require the subscriber to accurately judge their usage pattern ?

additional service fees and add-on chargesa)

service speedb)

basic service cost (i.e. at rate monthly fee)c)

equipment typed)

Q7

Locking mobile broadband customers in to longer term contracts often reduces churn

and?

helps with device subsidiesa)

reduces operator capexb)

increases operator opexc)

increases market shared)


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Background to 3G Development .....

Q1

3G services are mainly delivered to end-users by:

equipment manufacturersa)

network operatorsb)

independent service providersc)

other end-usersd)

Q2

3G networks are intended to be optimized for the delivery of:

voice servicesa)

a range of non-voice servicesb)

SMSc)

videod)

Q3

The target bit rate for pedestrian access to 3G networks is:

512Kbpsa)

384Kbpsb)

144Kbpsc)

2Mbpsd)

Q4

3GPP2 is primarily concerned with:

Developing 4G standardsa)

Developing 3G standards based on CDMA networksb)

Developing 3G standards based on GSM/UMTS networksc)

Harmonizing the global development of CDMA-based 3G networksd)


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Q5

3GPP and 3GPP2 are working within which common framework:

UMTSa)

IMT-2000b)

CDMAc)

GSMd)


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3GPP Specifcations and Evolution.....

Q1

Which release of the 3GPP specications was concerned with the evolution towards an

all-IP core network architecture?

Release 99a)

Release 4b)

Release 5c)

Release 6d)

Q2

Proposals for core network architecture and service network architecture evolution were

contained within which 3GPP release?

Release 5a)

Release 6b)

Release 7c)

Release 8d)

Q3

LTE was initially developed to meet which peak data rates in the downlink and uplink

(respectively)?

10Mbps, 5Mbpsa)

100Mbps, 50Mbpsb)

10MHz, 5MHzc)

14.2Mbps, 2Mbpsd)

Q4

HSDPA is designed to support which data speeds in the downlink?

10.8Mbpsa)

100Mbpsb)

14.2Mbpsc)1Mbpsd)


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Q5

Which version of HSPA forms the foundation for 3.9G/4G?

HSPAa)

HSUPAb)

HSPA+c)

HSDPAd)


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3GPP2 Evolution and Future Options.....

Q1

Which version of CDMA supports download speeds of up to 3.1Mbps?

cdmaOnea)

CDMA 1x EV-DVb)

CDMA 1x EV-DOc)

CDMA 1xd)

Q2

What is the maximum downlink speed per carrier under CDMA 1x EV-DO Rev. B?

1.8Mbpsa)

3.1Mbpsb)

4.9Mbpsc)

14.7Mbpsd)

Q3

What is the maximum number of carriers that can be supported under CDMA 1x EV-DO

Rev. B?

15a)

12b)

10c)

8d)

Q4

Which peak downlink/uplink speeds (respectively) was UMB designed to support in the

20MHz band?

3.1Mbps/1.8Mbpsa)

5.3Mbps/1.8Mbpsb)

6.2Mbps/3.6Mbpsc)

288Mbps/75Mbpsd)


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Q5

Which technology/architecture will not be a viable migration option for CDMA operators?

LTEa)

UMBb)

SAEc)

WiMAXd)


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The IEEE 802.16 Family.....

Q1

Which IEEE 802 committee is primarily concerned with mobile broadband wireless access

(MBWA)?

802.20a)

802.16b)

802.15c)

802.11d)

Q2

The IEEE 802.11n WLAN standard supports data rates that are approximately how many

times faster than IEEE 802.11a?

Twice as fasta)

Four times as fastb)

Six times as fastc)

Ten times as fastd)

Q3

IEEE 802.16e is primarily concerned with:

Quality of Servicea)

WiBrob)

Multiple access pointsc)

Mobile broadbandd)

Q4

How is IEEE 802.20 differentiated from previous version of mobile broadband standards?

Provides a migration path for 3GPP and 3GPP2 technologiesa)

Aims to provide synchronous downlink/uplink data ratesb)

Aims to design a mobile broadband system from the ground upc)

Backwards-compatible with other IEEE 802 standardsd)


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Q5

WiMAX can be most effectively used as a cost-efcient substitute for which type of

network?

WiFia)

Metropolitan breb)

Bluetoothc)

Satellited)


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Technologies for Evolving Wireless.....

Q1

Which common modulation scheme is most commonly found in todays radio

technologies?

PSK (Phase shift keying)a)

ASK (Amplitude shift keying)b)

FSK (Frequency shift keying)c)

DSK (Digital shift keying)d)

Q2

What is the effect on adaptive modulation of a reduction in range?

Modulation decreasesa)

Modulation stays the sameb)

Modulation increasesc)

No effectd)

Q3

Error coding is used to:

Improve latencya)

Improve data accuracyb)

Improve throughputc)

Improve overall systems effectivenessd)

Q4

The key benet of Orthogonal Frequency Division Multiplexing (OFDM) is:

Reduced latencya)

Improved throughputb)

Improved spectrum efciencyc)

Improved data accuracyd)


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SECTION 2

PRACTICE PAPER


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End-of-Section Practice Paper

(These questions are designed to encourage further research as well as to consider the

practical implementation issues associated with next-generation wireless systems.)

Q1

Assess the importance and effectiveness of the contribution of the ITUs standardization

bodies to the development of global next-generation wireless systems.

Q2

Describe the limitations of UMB as a true mobile broadband technology.

Q3

Assess the relative usefulness of WiFi, WiMAX and LTE for operators seeking to

maximize their mobile broadband coverage.

Q4

What are the drivers and barriers to the commercial deployment of LTE networks?

Q5

Some mobile network operators have not yet implemented 3G systems. Assess whether

they should do so, or whether they should defer mobile broadband implementation until

4G networks become available.


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End-of-Section Multiple Choice Questions

Q1

The target bit rate for 3G access at


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Q5

HSPA+ is designed to support which data speeds in the downlink?

10.8Mbpsa)

100Mbpsb)

14.2Mbpsc)

42Mbpsd)

Q6

Which version of CDMA supports download speeds of up to 2.4Mbps?

cdmaOnea)

CDMA 1x EV-DVb)

CDMA 1x EV-DOc)

CDMA 1xd)

Q7

The original specications for UMB were the responsibility of which body?

3GPPa)

3GPP2b)

ITUc)

Independent equipment manufacturersd)

Q8

Which IEEE committee is responsible for the development of WiFi standards?

802.15a)

802.20b)

802.16c)

802.11d)

Q9

By 2013, approximately how many WiMAX base stations are forecast to be in operation

globally?

8,000a)

80,000b)

180,000c)

280,000d)


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Q10

The technique commonly used to increase the number of users that can access a single

cell is referred to as:

Multiplexinga)

Modulationb)

Error control codingc)

Time-sharingd)


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The Roadmap to 4G


SECTION 3

THE ROADMAP TO 4G


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The Roadmap to 4G



The ITU 4G Framework and Timelines.....

Q1

Which of the following technologies is considered to be one of the main candidates for

ratifcation as a 4G standard?

WiMAXa)

LTEb)

CDMA 1x EV-DOc)

WiFid)

Q2

A WCDMA network operator seeking to upgrade to an LTE network would usually consider

which migration route?

WiFia)

cdmaOneb)

TD-SCDMAc)

HSxPAd)

Q3

Which technology standard does the NGMN Alliance endorse?

BWAa)

WiMAXb)

WiBroc)

LTEd)

Q4

What downlink data rates will the ITUs IMT-Advanced Standard require?

10Mbpsa)

100Mbpsb)

1Gbpsc)

50Mbpsd)


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Q5

Large-scale (WAN) deployment of LTE by Tier 2 operators is expected to begin from which

date?

2010a)

2011b)

2012c)

2013d)


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The Roadmap to 4G



Candidate 4G Technologies.....

Q1

One of the requirements of the ITUs IMT-Advanced specications is for seamless

connectivity. To what does this primarily refer?

Connections between different operators using the same network standarda)

(e.g. LTE)

Connections between different operators using different network standardsb)

(e.g. LTE-WiMAX)

Connections between LTE/4G and at least one 2G network standard (e.g.c)

cdmaOne)

Connections between LTE/4G and at least one IMT-2000 network standardd)

(e.g.

CDMA 1x EV-DO)

Q2

Which core LTE technology would be used to achieve improved average throughput?

MIMOa)

OFDMAb)

Femtocellsc)

SDRsd)

Q3

Which existing networking standard already incorporates OFDMA?

EV-DO Rev. Aa)

HSUPAb)

802.16ec)

WCDMAd)


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Q4

The key benet of deploying femtocells in LTE implementation occurs in which part of the

network?

Base stationa)

Backhaulb)

Radio accessc)

Core networkd)

Q5

What is the main barrier to deploying SDRs in large-scale LTE network deployments?

Inherent cost of upgrading power ampliers in legacy base station equipmenta)

Lack of signicant cost savingsb)

Unsuitable for large-scale LTE network deploymentsc)

SDRs are only available through Chinese vendorsd)


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The Roadmap to 4G



4G Services, Appl ications and Devices.....

Q1

According to the ITU, what type of functionality would context-based services be expected

to deliver in a 4G network?

Scalable according to the location of the devicea)

Automatic, network-driven reconguration of devices in line with contextb)

QoS levels in line with signal strength in different locationsc)

Security of user informationd)

Q2

According to the ITU, which type of 4G application would require an interactive, low-delay

class of service?

Instant messaginga)

e-mailb)

Location-based servicesc)

File transferd)

Q3

What type of 4G device does Informa Telecoms & Media predict will dominate by 2013?

Netbooksa)

USB modemsb)

Data cardsc)

Mobile devicesd)

Q4

For 4G services to remain affordable to end-users, what must be the primary concern of

operators seeking to implement LTE-based networks?

Reduce capital expenditurea)

Reduce cost-per-packetb)

Reduce operating expenditurec)Reduce pricesd)


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Q5

The common characteristic of 4G applications is that they must focus on:

Innovationa)

Vendor capabilitiesb)

Network utilization efcienciesc)

Spectrum utilization efcienciesd)


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The Roadmap to 4G


SECTION 3

PRACTICE PAPER


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End-of-Section Practice Paper

(These questions are designed to encourage further research as well as to consider the

practical implementation issues associated with next-generation wireless systems.)

Q1

What recommendations would you make to a 2.5G operator in a developing market in

terms of migration to a 4G network?

Q2

What are the main barriers to deployment of 4G networks?

Q3

What do you consider to be the main weaknesses of the ITUs approach to

standardization?

Q4

To what extent do you believe that the 4G standards under development are truly market-

driven? Justify your answer.

Q5

Do you believe that all network operators should be looking to deploy 4G networks?

Justify your answer, using examples from different countries.


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Q5

According to vendors, what is the main benet of deploying SDRs?

Ease of deploymenta)

Ease of recongurationb)

Opex savingsc)

Capex savingsd)

Q6

According to the ITU, which type of 4G application would require a streaming, non-live

class of service?

Interactive gaminga)

Location-based servicesb)

Remote collaborationc)

Emergency callingd)

Q7

Where will MIMO antennas be located?

Inside mobile terminals onlya)

Inside mobile devices and on base stationsb)

On base stations onlyc)

Inside USB modems onlyd)

Q8

Large-scale (WAN) deployment of LTE by Tier 1 operators is expected to begin from

which date?

2010a)

2011b)

2012c)

2013d)

Introduction to LTE and 4G WirelessModule 1 MCQ Answers

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