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  5. Ericsson Certified Associate - Radio Network Optimization Questions and Answers

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Questions # 1:

Several operators are using a Multi Operator Core Network (MOCN) with the Shared LTE RAN feature. Which element is shared by the operators in this scenario?

Options:
A.

eNodeB

B.

IMS

C.

MME

D.

SGW

Questions # 2:

Which statement describes uplink Discontinuous Transmission (DTX)?

Options:
A.

DTX is a method of saving battery power for the BTS by turning off the transmitter while "voice" is not present.

B.

DTX is a method of saving battery power for the MSC by turning off the transcoder while "voice" is not present.

C.

DTX is a method of saving battery power for the BSC by turning off the transcoder while "voice" is not present.

D.

DTX is a method of saving battery power for the MS by turning off the transmitter while "voice" is not present.

Questions # 3:

Which two statements about physical resource blocks (PRB)s are correct? (Choose two.)

Options:
A.

The maximum number of assigned PRBs for a TTI can exceed the number of available PRBs in the cell for that TTI.

B.

The DL PRB distribution is not affected by the number of active cell users in the cell.

C.

A higher throughput is expected when more DL PRBs are assigned to a user for a TTI.

D.

The number of PRBs assigned for a user is dependent on the number of active users in the cell.

Questions # 4:

What is an advantage of using flexible numerology in New Radio (NR) 5G?

Options:
A.

It allows an alphanumeric mapping between physical data channels on coslted LTE and NR in non-standalone scenarios.

B.

It provides a non defined link between subcarriers used in LTE and NR.

C.

It ensures that the same subcarrier bandwidth is used in NR in both high and low frequencies.

D.

It maintains a more consistent overhead over a very large range of carrier frequencies.

Questions # 5:

Which two statements correctly describe Single Carrier Frequency Division Multiple Access (SC-FDMA) as used in LTE systems using uplink SIMO? (Choose two.)

Options:
A.

SC-FDMA allows simultaneous uplink transmissions on the same physical resource blocks.

B.

SC-FDMA is beneficial because it avoids (nter-cell interference.

C.

SC-FDMA separates uplink transmissions in the time and/or frequency domain.

D.

SC-FDMA is beneficial because it avoids intra-cell interference.

Questions # 6:

Which statement is correct about network slicing?

Options:
A.

Network slicking is a splitting of end users between competing operators in small population markets.

B.

Network slicing is a customized division of a cellular network designed to allow end users to control allocation of network resources between themselves.

C.

Network slicing is a separation of network architecture between vendors in a multivendor network.

D.

Network slicing is a movement of network functions between aggregation layers to meet performance requirements for specific use cases.

Questions # 7:

Which two statements are correct about voice quality in a VoLTE network? (Choose two.)

Options:
A.

Increasing jitter will improve voice quality.

B.

Increasing silent gaps in the received audio signal will improve voice quality.

C.

Decreasing jitter will Improve voice quality.

D.

Decreasing silent gaps in the received audio signal will improve voice quality.

Questions # 8:

Which two statements are true about 64 QAM modulation in the downlink direction? (Choose two.)

Options:
A.

The usage of 64 QAM is not dependent on radio channel quality.

B.

The usage of 64 QAM is UE dependent.

C.

The spectral efficiency of 64 QAM is higher than QPSK in strong radio conditions.

D.

The spectral efficiency of 64 QAM is lower than QPSK in strong radio conditions.

Questions # 9:

Which two statements are true about the Antenna Integrated Radio (AIR)? (Choose two.)

Options:
A.

The AIR is a hardware unit that integrates the radio and the antenna.

B.

The AIR replaces the digital/baseband unit.

C.

The AIR in an LTE system is directly connected with the MME using the SI interface.

D.

The AIR can replace the standard RU/RRU and antenna.

Questions # 10:

You are performing a physical parameter optimization of an LTE network with an automatic tool that uses propagation predictions. As a result, the tool estimates an increase of RSRP from cell A at a particular location.

In this scenario, what has happened?

Options:
A.

Signal attenuation from the transmitter to the location has increased.

B.

The antenna pattern of cell A has changed.

C.

The PRB utilization of cell A has decreased.

D.

Soft handover factor has increased.

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