Rno
- 1.
Which standarization body is responsibilefor developing the CDMA2000 technical standards?
- A.
3GPP2
- B.
ITU
- C.
3GPP
- D.
IETF
Correct Answer
A. 3GPP2 -
- 2.
What are the 2 porposes of the paging procedure?
- A.
To advice a UE that the system is ready for new originating call
- B.
To advice a UE about important changes in the system information.
- C.
To advice a UE of a terminating text message.
- D.
To advice a UE that the load is reaching its maximum allowed value.
Correct Answer(s)
B. To advice a UE about important changes in the system information.
C. To advice a UE of a terminating text message. -
- 3.
Which three frequencies bw are defined in the 3GPP standared for use in LTE N/W ?
- A.
1.25 mhz
- B.
1.4 mhz
- C.
3 mhz
- D.
7.5 mhz
- E.
10 mhz
Correct Answer(s)
B. 1.4 mhz
C. 3 mhz
E. 10 mhz -
- 4.
Which standarization body is responsibilefor developing the GSM technical standards?
- A.
3GPP2
- B.
ITU
- C.
3GPP
- D.
IETF
Correct Answer
C. 3GPP -
- 5.
Which two LTE/SAE entities originate and terminate NAS signaling ?(choose 2)
- A.
UE
- B.
ENB
- C.
MME
- D.
S-GW
Correct Answer(s)
A. UE
C. MME -
- 6.
Regarding AMR , which two statement are correct ? Choose 2
- A.
AMR improves the mean opinion score (MOS) by selecting the proper modulation based on the road channel quality.
- B.
AMR extends the radio coverage by adapting the robustness to channel orrors.
- C.
Any bit rate below 12.2 kbps is available for call setup.
- D.
Both full rate & half rate are allowed when using AMR
Correct Answer(s)
B. AMR extends the radio coverage by adapting the robustness to channel orrors.
D. Both full rate & half rate are allowed when using AMR -
- 7.
An LTE coverage is configured with random access format 0, then what will be the approx maximum cell range ?
- A.
7 km
- B.
15 km
- C.
30 km
- D.
80 km
Correct Answer
B. 15 km -
- 8.
A customer has identified problem in the outdoor location in a high loaded dense area. There appears to be a problem in the downlink due to interference and poor dominance, signal levels are high.Downtilt are at their max values. What 2 actions can resolve the issue?
- A.
Add a small outdoor cell in the same RAT & frequency.
- B.
InStall TMA/RRU
- C.
Decrease anteena height
- D.
Offlaod traffic to a different RAT
Correct Answer(s)
C. Decrease anteena height
D. Offlaod traffic to a different RAT -
- 9.
What are 3 functions of ANR LTE feature set?
- A.
Automatically adjust individual cell offset
- B.
Automatically setup WCDMA neighbor relations
- C.
Prevent PCI conflicts occuring
- D.
Remove unused neighbor relations
- E.
Automatically setup realtions when needed
Correct Answer(s)
B. Automatically setup WCDMA neighbor relations
D. Remove unused neighbor relations
E. Automatically setup realtions when needed -
- 10.
A UE moves from cell edge to the center of a cell with radius >1km ? What will occur ?
- A.
The TA command send to the enb will increase
- B.
The TA command send to the UE will increase
- C.
The TA command send to the ENB will decrease
- D.
The TA command send to the UE will decerease
Correct Answer
D. The TA command send to the UE will decerease -
- 11.
During an integration DT, dropped calles are caused by a missing nbr,?
- A.
Implement new scrambling code plan
- B.
Reduce CPICH power of detected Cell
- C.
Reduce CPICH power of new site
- D.
Adjust intercell ho parametr in both sites
Correct Answer
B. Reduce CPICH power of detected Cell -
- 12.
In a dense urban area , the traffic load has increased significantly since the last freq plan. A large number of TRX has been deployed for managing the traffic. The DL quality has been degraded. Taking account that the available bw is limited whaich strategy should we use?
- A.
Impelement a new BSIC plan
- B.
Impelement a new BCCH plan
- C.
Impelement a new MAIO plan
- D.
Impelement a new PSC plan
Correct Answer
C. Impelement a new MAIO plan -
- 13.
For GSM DT, data processing , what information is mendatory to assign the cell name ?
- A.
Sector name BSIC-MAIO mapping
- B.
Sector name BCCH-MAIO mapping
- C.
Sector name BCCH-BSIC mapping
- D.
BCCH BSIC-MAIO mapping
Correct Answer
C. Sector name BCCH-BSIC mapping -
- 14.
When using SON, what are 2 inputs of the WCDMA ANR optimization feature?
- A.
Geo sector location
- B.
MOS statistics
- C.
N/W performance statistics
- D.
Interference matrix
Correct Answer(s)
A. Geo sector location
C. N/W performance statistics -
- 15.
An automated cell palnning tool is beeing used to optimize machanical anteena tilt settings in a WCDMA N/W .the tool output will include a digital map showing the prediction ECIo levels in the n/w if the recomnded tilt values are implemented. Which two metrics will change based on any new recommended tilt settings (chose 2)
- A.
Anteena radiation gain per pixel
- B.
Anteena radiation gain per cell
- C.
Downlink load factor per cell
- D.
Downlink load factor per pixel
Correct Answer(s)
B. Anteena radiation gain per cell
C. Downlink load factor per cell -
- 16.
What are two primary purposes of monitoring and troublshooting tools?( choose 2)
- A.
Automated n/w planning
- B.
Coevarage prediction
- C.
Worst offenders detection
- D.
Performance monitoring
Correct Answer(s)
C. Worst offenders detection
D. Performance monitoring -
- 17.
In the exhibit, the transmitters in Cell A and Cell B are configured to transmit at maximum output power. Which statement correctly describes the EIRP of the two cells? Some image will be there
- A.
Cell A is 3 dB higher EIRP than Cell B.
- B.
Cell A has the same EIRP as Cell B.
- C.
Cell A is 3 dB lower EIRP than Cell B.
- D.
Cell A is 6 dB lower EIRP than Cell B.
Correct Answer
B. Cell A has the same EIRP as Cell B. -
- 18.
What are two advantages of soft handover in a WCDMA network? (Choose two.)
- A.
UE uses several radio links which require less channelization codes.
- B.
Can reduce UE transmit power.
- C.
UE uses less resources on the IuB and Iur interfaces.
- D.
Overcomes fading through macro diversity.
Correct Answer(s)
B. Can reduce UE transmit power.
D. Overcomes fading through macro diversity. -
- 19.
Which three categories are used by the UE to classify measured Primary Scrambling Codes (PSC)? (Choose three.)
- A.
Active Set
- B.
Monitored Set
- C.
Connected Set
- D.
Detected Set
- E.
Idle Set
Correct Answer(s)
A. Active Set
B. Monitored Set
D. Detected Set -
- 20.
A UE records an RSRP measurement of -100 dBm with no reference signal power boosting. The measured average noise across 50 physical resource blocks is -120 dBm per 15 kHz. What is the measured downlink RS-SINR in dB?
- A.
-20 dB
- B.
1.2 dB
- C.
3.33 dB
- D.
20 dB
Correct Answer
D. 20 dB -
- 21.
What is the channel used to calculate the initial timing advance in a GSM network?
- A.
RACH
- B.
FACH
- C.
BCCH
- D.
SDCCH
Correct Answer
A. RACH -
- 22.
Which two statements correctly describe Single Carrier Frequency Division Multiple Access (SC-FDMA) as used in LTE systems using uplink SIMO? (Choose two.)
- A.
SC-FDMA separates uplink transmissions in the time and/or frequency domain.
- B.
SC-FDMA is beneficial because it avoids intra-cell interference.
- C.
SC-FDMA is beneficial because it avoids inter-cell interference.
- D.
SC-FDMA allows simultaneous uplink transmissions on the same physical resource blocks.
Correct Answer(s)
A. SC-FDMA separates uplink transmissions in the time and/or frequency domain.
B. SC-FDMA is beneficial because it avoids intra-cell interference. -
- 23.
Which channel is dedicated in a GSM system to provide a reliable connection for signaling and Short Message Service (SMS) messages?
- A.
TCH
- B.
SDCCH
- C.
SCCH
- D.
BCCH
Correct Answer
B. SDCCH -
- 24.
Which statement describes 2x2 Downlink MIMO operations in LTE?
- A.
2x2 MIMO can double downlink throughputs in areas of low SINR when the two data streams are transmitted from co-polar antenna elements.
- B.
2x2 MIMO can double downlink throughputs in areas of low SINR when the two data streams are transmitted from cross polar antenna elements.
- C.
2x2 MIMO can double downlink throughputs in areas of high SINR when the two data streams are transmitted from co-polar antenna elements.
- D.
2x2 MIMO can double downlink throughputs in areas of high SINR when the two data streams are transmitted from cross polar antenna elements.
Correct Answer
D. 2x2 MIMO can double downlink throughputs in areas of high SINR when the two data streams are transmitted from cross polar antenna elements. -
- 25.
Which physical channel is used to transmit event triggered channel-state reports?
- A.
Physical Uplink Control Channel (PUCCH)
- B.
Physical Uplink Shared Channel (PUSCH)
- C.
Physical Downlink Control Channel (PDCCH)
- D.
Physical Random Access Channel (PRACH)
Correct Answer
A. Physical Uplink Control Channel (PUCCH) -
- 26.
What is the purpose of synthesizer hopping?
- A.
It is the process of tuning a transmitter’s output frequency to a designated channel.
- B.
It is the process of tuning multiple transmitters to designated output frequency channels.
- C.
It is the process of tuning the propagation model based on frequency usage.
- D.
It is the process of tuning the RF parameters per frequency band.
Correct Answer
B. It is the process of tuning multiple transmitters to designated output frequency channels. -
- 27.
Which scenario represents the uplink cell breathing effect?
- A.
Link budget is reduced when interference decreases.
- B.
Quality degrades when intercell interference increases.
- C.
Throughput per user decreases when traffic decreases.
- D.
Cell size decreases when intracell interference increases
Correct Answer
D. Cell size decreases when intracell interference increases -
- 28.
In a WCDMA network, traffic increases while the geographical user distribution and the PA power remain the same. What are two results? (Choose two.)
- A.
cell breathing increases
- B.
cell breathing decreases
- C.
power per user increases
- D.
power per user decreases
Correct Answer(s)
A. cell breathing increases
C. power per user increases -
- 29.
What are two goals achieved by using uplink Discontinuous Transmission (DTX)? (Choose two.)
- A.
to extend the battery life of the MS
- B.
to reduce the power consumption of the BTS
- C.
to allow the uplink channel sharing during non-transmission time slots
- D.
to improve the uplink interference by halting the transmission
Correct Answer(s)
A. to extend the battery life of the MS
D. to improve the uplink interference by halting the transmission -
- 30.
Which statement describes power control on an HS-PDSCH channel?
- A.
Regular open loop power control is used.
- B.
Inner closed loop power control is used.
- C.
Outer loop power control is used.
- D.
Dynamic power control is not used.
Correct Answer
B. Inner closed loop power control is used. -
- 31.
Which LTE feature allows an LTE user with an active data session to receive a terminating circuit switched voice call?
- A.
SRVCC
- B.
VoLTE
- C.
CSFB
- D.
RoHC
Correct Answer
B. VoLTE -
- 32.
Which modulation scheme would be expected in an LTE network with high traffic load experiencing inter-cell interference where SINR_DL=-5 dB and RSRP=-105 dBm?
- A.
16 QAM
- B.
GMSK
- C.
64 QAM
- D.
QPSK
Correct Answer
D. QPSK -
- 33.
Which two functions are performed by the BSC in a GSM network? (Choose two.)
- A.
Trigger mobility procedures during a speech connection.
- B.
Take into account the timing advance to adjust the BTS timing.
- C.
Trigger the location area update procedure.
- D.
Control the MS transmitted power during a speech call.
Correct Answer(s)
A. Trigger mobility procedures during a speech connection.
C. Trigger the location area update procedure. -
- 34.
An LTE drive test result shows very low incidences of 2x2 MIMO being successfully used. The UE reported that RS-SINR is high. What are two reasons for this happening? (Choose two.)
- A.
The cell transmit antennas have been connected in cross polar.
- B.
The cell transmit antennas have been connected in co-polar.
- C.
Both feeders have been swapped with an adjacent cell.
- D.
One feeder has been swapped with an adjacent cell.
Correct Answer(s)
B. The cell transmit antennas have been connected in co-polar.
D. One feeder has been swapped with an adjacent cell. -
- 35.
When the results of an LTE network drive test were analyzed, it was observed that the round trip times (RTT) reported by a Ping test increased when the reported pathloss was high. An example of the data is shown below: Pathloss = 110 dB RTT = 34 msec . Pathloss = 130 dB RTT = 34 msec . Pathloss = 150 dB RTT = 54 msec Which statement is a valid reason for the observed increase in RTT?
- A.
When the pathloss is high, the Ping test protocol ceases working so that the UE can transmit control signaling to the BTS.
- B.
When the pathloss is high, the BTS allocates fewer physical resource blocks in the downlink increasing data transmission times.
- C.
When the pathloss is high, the block error rate (BLER) increases which leads to HARQ retransmissions increasing total transmit times.
- D.
When the pathloss is high, the physical distance to the base station is always much larger.
Correct Answer
C. When the pathloss is high, the block error rate (BLER) increases which leads to HARQ retransmissions increasing total transmit times. -
- 36.
A customer has a dual band network. After frequency refarming, the available GSM spectrum is greatly reduced, and quality has degraded. Which feature should be deployed with high priority?
- A.
Overlaid/Underlaid Subcell
- B.
BTS Power Saving
- C.
Extended Range Cell
- D.
Directed Retry
Correct Answer
A. Overlaid/Underlaid Subcell -
- 37.
What are two purposes for traffic balancing in WCDMA networks? (Choose two.)
- A.
to relieve localized congestion problems
- B.
to increase the 3G-2G handover success rate
- C.
to reduce the ping pong effect in the 3G-2G idle reselection process
- D.
to increase HSDPA throughput
Correct Answer(s)
A. to relieve localized congestion problems
D. to increase HSDPA throughput -
- 38.
A new 3G site is going to be integrated into an urban environment with a high traffic load. What would you do to optimize the area?
- A.
Increase the CPICH power in the surrounding cells.
- B.
Increase the soft handover window in the surrounding cells.
- C.
Increase the downtilt in the surrounding cells.
- D.
Increase the admission control thresholds in the surrounding cells.
Correct Answer
C. Increase the downtilt in the surrounding cells. -
- 39.
During a drive test analysis, several iRAT handovers are triggered by uplink interference. The cluster is in a city center area and has good coverage. The uplink RTWP network statistics are shown in the exhibit. What would be the root cause of this issue?
- A.
A lack of uplink channel elements during busy hours is causing both high uplink interference and iRAT handovers.
- B.
Pilot pollution due to traffic load is causing high uplink RTWP peaks at the busy hour.
- C.
External interference is causing high uplink noise during low traffic hours.
- D.
iRAT handover signaling load is increasing the uplink noise.
Correct Answer
C. External interference is causing high uplink noise during low traffic hours. -
- 40.
Which two actions are related with the “Fast Return to LTE after Call Release” GSM feature? (Choose two.)
- A.
GSM to LTE handover procedures
- B.
CS fallback
- C.
GSM-LTE cell reselection
- D.
GSM-LTE drop per minute improvement
Correct Answer(s)
A. GSM to LTE handover procedures
C. GSM-LTE cell reselection -
- 41.
A customer suspects that its GSM network has problems with overshooting. An initial problem analysis must be completed using network statistics. Which two metrics would you verify with highest priority? (Choose two.)
- A.
timing advance
- B.
RxLev
- C.
interference matrix
- D.
RxQual
Correct Answer(s)
A. timing advance
D. RxQual -
- 42.
Which statement describes the behavior of shifted Reference Symbols (RS) in an LTE network?
- A.
The RS location is shifted in frequency to ensure that all cells transmit RS on the same frequency.
- B.
The RS location is shifted in time to ensure that the Primary Synchronization Signal (PSS) in adjacent cells is transmitted in different sub-frames.
- C.
The RS location is shifted in frequency to avoid clashing with RS transmitted by adjacent cells.
- D.
The RS location is shifted in time to ensure that RS avoids clashing with traffic channels on adjacent cells.
Correct Answer
C. The RS location is shifted in frequency to avoid clashing with RS transmitted by adjacent cells. -
- 43.
What is radio network soft congestion control?
- A.
It is a process that only blocks guaranteed bit rate traffic from handing over into a cell.
- B.
It is a process that allows rate reduction or pre-emption of lower priority users to allow admission of more users on the cell.
- C.
It is a process that constantly monitors dynamic resources like Non-HSDPA downlink transmitted carrier power to ensure that these are not overloaded by existing users on the cell.
- D.
It is a process that disconnects inactive users to allow new admission attempts.
Correct Answer
B. It is a process that allows rate reduction or pre-emption of lower priority users to allow admission of more users on the cell. -
- 44.
Which three functions in LTE make use of the random access process to establish timing advance information for communication with the serving cell? (Choose three.)
- A.
initial access to a cell
- B.
handover between cells
- C.
data transmissions in the downlink
- D.
transmission of sounding reference symbols
- E.
re-establishment of a radio link after a radio link failure
Correct Answer(s)
A. initial access to a cell
B. handover between cells
E. re-establishment of a radio link after a radio link failure -
- 45.
In an Ericsson solution, which condition should be fulfilled to trigger non HS (DCH) Inter Frequency Load Sharing?
- A.
The target cell should be declared as an inter frequency neighbor of the source cell.
- B.
The RAB Establishment should come from IDLE mode using SRB.
- C.
The path loss should be above the configured threshold.
- D.
There should be differences in the services supported by the source cell and target cell.
Correct Answer
A. The target cell should be declared as an inter frequency neighbor of the source cell. -
- 46.
In the Ericsson LTE system, what are two benefits of Delay-Based Scheduler and Grant Estimation? (Choose two.)
- A.
It improves uplink coverage by scheduling all HARQ redundancy versions in a row to minimize delay.
- B.
It improves mobile broadband user experience when the cell has high VoIP load.
- C.
It improves VoIP capacity for a specific mobile broadband load.
- D.
It reduces delay by decreasing the size of a VoIP packet to reduce the need for buffer status reports.
Correct Answer(s)
B. It improves mobile broadband user experience when the cell has high VoIP load.
C. It improves VoIP capacity for a specific mobile broadband load. -
- 47.
What is a benefit of session continuity in the Ericsson LTE system?
- A.
LTE users can maintain a 3G speech call between LTE and other RATs.
- B.
LTE users are redirected to another RAT if poor coverage is detected on the LTE network.
- C.
Specific users are given high priority to ensure higher retainability.
- D.
Specific users are given high priority to ensure higher accessibility.
Correct Answer
B. LTE users are redirected to another RAT if poor coverage is detected on the LTE network. -
- 48.
A customer has identified problems in an indoor, medium loaded, urban area of a GSM/UMTS collocated network. The problem seems to be in the uplink. The signal received by the problematic site is high, and the downlink signal in the problematic area is acceptable. Which two actions would you use to troubleshoot the issue? (Choose two.)
- A.
Decrease base station transmission power.
- B.
Investigate external interference.
- C.
Add a pico cell in the same RAT and frequency.
- D.
Run a PIM analysis.
Correct Answer(s)
A. Decrease base station transmission power.
B. Investigate external interference. -
- 49.
You have a GSM network with high drop call rate (DCR) due to interference (high RxQual 5-7). What will resolve this situation?
- A.
handover optimization
- B.
frequency planning optimization
- C.
traffic balance
- D.
reselection optimization
Correct Answer
B. frequency planning optimization -
- 50.
You have a GSM cell reporting HO drop rate issues. Which two parameters would you tune to solve the problem? (Choose two.)
- A.
power budget handover parameters
- B.
soft handover parameters
- C.
admission control parameters
- D.
multi-band handover handling parameters
Correct Answer(s)
A. power budget handover parameters
D. multi-band handover handling parameters -
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Jul 15, 2017Quiz Edited by
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