Ericsson Ericsson Certifications ECP-383 Questions & Answers

• Question 21:

  Which multiple access technique is used In LTE radio DL?

  A. Single Carrier Frequency Division Multiple Access (SC-FDMA)

  B. Time Division Multiple Access (TDMA)

  C. Code Division Multiple Access (CDMA)

  D. Orthogonal Frequency Division Multiple Access (OFDMA)

  Correct Answer: D

• Question 22:

  What is a benefit of Remote Radio Unit (RRU) deployment compared to a standard Radio Unit (RU) deployment?

  A. RRU consumes less power.

  B. RRU provides for easier legalization of the equipment.

  C. RRU provides easier deployment and maintenance.

  D. RRU has lower feeder loss.

  Correct Answer: D

• Question 23:

  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 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.

  Correct Answer: AD

• Question 24:

  Which two statements are valid for Call Re-establishment in WCDMA? (Choose two.)

  A. Call Re-establishment in WCDMA targets RL failures or RLC errors in the DL.

  B. When Call Re-establishment in WCDMA is activated and after RL failure or an RLC unrecoverable error, the UE selects a new cell using the soft handover procedure.

  C. Call Re-establishment in WCDMA improves the voice drop rate.

  D. When Call Re-establishment in WCDMA is activated and after RL failure or an RLC unrecoverable error, the UE goes to idle mode.

  Correct Answer: BC

• Question 25:

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

  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.

  Correct Answer: AD

• Question 26:

  What are two benefits of massive MIMO? (Choose two.)

  A. It serves many users in the same time and frequency with a single element antenna.

  B. It increases SINR by focusing a signal toward an individual user.

  C. It serves many spatially separated users in the same time and frequency.

  D. It increases throughput by allowing access to larger spectrum slices.

  Correct Answer: CD

• Question 27:

  An LTE operator explains that the traffic in cell A is very high compared to the traffic In cell B, which are close to each other. Cells A and B are using the same frequency.

  In this scenario, which two actions would balance the traffic between cell A and cell B? (Choose two.)

  A. Optimize the connected mode mobility parameters.

  B. Optimize the idle mode related parameters.

  C. Activate the inter-frequency load balancing feature.

  D. Activate the TTI Bundling feature.

  Correct Answer: AB

• Question 28:

  Which two channel bandwidths are available in LTE? (Choose two.)

  A. 2.8 MHz

  B. 1.4 MHz

  C. 30 MHz

  D. 15 MHz

  Correct Answer: BD

• Question 29:

  Review the exhibit.

  

  Cell A has neighbor relations with cells B and C which share the same frequency and PCI. Cells B and C do not share any overlapping area.

  Referring to the exhibit which statement is correct?

  A. Handover performance of cell A is affected.

  B. There is no degraded performance expected in any of the cells.

  C. Handover performance of cell C is affected.

  D. Handover performance of cell B is affected.

  Correct Answer: A

• Question 30:

  Performance Management Statistics have recently shown a sharp rise in received interference power on an LTE site during the busiest hours. A collocated WCDMA base station has recently acquired a new carrier and upgraded power amplifier. The upgrade correlates with the sharp rise in received interference power.

  What are two appropriate actions to solve this problem? (Choose two.)

  A. Request or perform a build audit of the newly upgraded collocated WCDMA site.

  B. Increase the power amplifier on the impacted collocated LTE sectors.

  C. Reduce the hsPowerMargin parameter to make more power available for HSDPA.

  D. Review the site design in consultation with the Ericsson collocation and coexistence guidelines.

  Correct Answer: AD