ECP-383問題集、Ericsson実際の試験問題

質問 1

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 (nter-cell interference.

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

正解: B,D

質問 2

Which multiple access technique is used In LTE radio DL?

A. Time Division Multiple Access (TDMA)

B. Orthogonal Frequency Division Multiple Access (OFDMA)

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

D. Code Division Multiple Access (CDMA)

正解: B

質問 3

Which two characteristics are true about 30 GHz spectrum compared to 2100 MHz spectrum? (Choose two.)

A. It has reduced in building penetration coverage.

B. It has improved in building penetration coverage.

C. It has a reduced antenna separation distance required for effective MIMO.

D. It has an increased antenna separation distance required for effective MIMO.

正解: A,C

質問 4

A user is making a call on an LTE network.
In this scenario, which encoding schemes are used?

A. CDMA in downlink, SC-FOMA in uplink

B. OFDMA in downlink, SC-FDMA in uplink

C. SC-FDMA in downlink, OFDMA in uplink

D. OFDMA in downlink, COMA in uplink

正解: B

質問 5

A customer has Identified problems In an Indoor, medium loaded, urban area of a GSM/WCDMA collocated network. The problem seems to be in the uplink. The signal level 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. Add a pico cell In the same RAT and frequency.

B. Investigate external interference.

C. Decrease base station transmission power.

D. Run a passive inter-modulation (PIM) analysis.

正解: B,D

質問 6

According to IR.92, which two LTE RAN functions are required to support VoLTE? (Choose two.)

A. Inter-frequency handover

B. RLC in Unacknowledged Mode for RTP transmissions

C. Multiple Radio Bearers per User

D. Service Specific Inactivity Timer

正解: C,D

質問 7

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 increases throughput by allowing access to larger spectrum slices.

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

正解: C,D

Ericsson Certified Associate - Radio Network Optimization - ECP-383 模擬練習