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NEW QUESTION 11
Whether it is the imbalance between the uplink and the downlink or the coverage hole is easy to cause dropped calls. Which of the following are correct? (Multiple Choice)

• A. Coverage hole means that the uplink or downlink is poor, and the uplink or downlink service cannot be performed normally.
• B. The poor performance of the downlink is that the CQI reported by the UE is poor or the network side HARQ receives a large amount of DTX and NACK from the positive side feedback.
• C. The poor performance of the uplink is that the RB is minimized, the uplink MCS selects 0th order, the PHR is already below 0db, and the uplink BLER is large and does not converge, and the probability of CRC check is higher.
• D. Uplink limitation refers to poor uplink and normal downlink; downlink limitation refers to normal uplink and poor downlink

Answer: B,C,D

 

NEW QUESTION 12
The uplink signal of the UE of Type 1 for CoMP is simultaneously received by two cells (the serving cell and the coordinated cell), and the combined demodulation with respect to the number of receiving antenna increases. At this point, UL CoMP can achieve significant signal combining gain.

• A. True
• B. False

Answer: A

 

NEW QUESTION 13
Prior to R10, only QPSK, 16QAM, and 64QAM modulation modes were supported. The R12 protocol supports downlink 256QAM.

• A. True
• B. False

Answer: A

 

NEW QUESTION 14
The core network may initiate explicit or implicit separation of the terminal.

• A. True
• B. False

Answer: A

 

NEW QUESTION 15
Which of the following parameters is modified to affect the cell PRACH channel capacity?

• A. Root sequence index
• B. Preamble format
• C. PRACH configuration index
• D. ZC root sequence cyclic shift (Ncs)

Answer: A,C,D

 

NEW QUESTION 16
With regard to competitive and non-competitive access, which of the following descriptions are correct? (Multiple choice)

• A. a random-access preamble sequence in a cell has 64
• B. RRC reconstruction after out-of-synchronization of wireless links generally adopts non-competitive mode
• C. Switching to a new cell generally adopts a competitive mode
• D. Non-competitive access, preamble adopts the allocation method to avoid competition conflicts.

Answer: A,C,D

 

NEW QUESTION 17
Which procedures does the RRC Connection Reconfiguration message be used for?

• A. DRBs
• B. SRB0
• C. SRB2
• D. SRB1

Answer: A,C

 

NEW QUESTION 18
For the frame structure type 2, the PSS will be mapped onto the 7th OFDM symbol of subframe 1 and subframe 6.

• A. True
• B. False

Answer: B

 

NEW QUESTION 19
Which of the following events can be used to trigger a different switch? (Multiple Choice)

• A. A2
• B. A4
• C. A3
• D. A5

Answer: B,C,D

 

NEW QUESTION 20
Which of the following statements is true about the LTE protocol architecture? (Multiple choice)

• A. The role of the logical channel is to characterize the type of message being transmitted.
• B. The physical layer provides data transmission services to the upper layers, which can be accessed through the MAC sublayer and using the transport channel.
• C. The role of the transport channel is to describe how information is transmitted over the wireless interface.
• D. MAC provides different logical channels to Layer 2 Radio Link Control (RLC) sublayer

Answer: A,B,C,D

 

NEW QUESTION 21
LTE can obtain various interface signaling through LMT, M2000, and drive test tools.

• A. True
• B. False

Answer: A

 

NEW QUESTION 22
Which of the following descriptions is correct?

• A. If the user's default APN is signed as the IMS APN in the HSS, the data APN is non-default, which will cause the user to activate the first default bearer with IMSIPN in all scenarios.
• B. There are default bearers and dedicated bearers in LTE. Voices for VoIP must use dedicated bearers.
• C. The attach type initiated by the VoLTE user is EPS-attach, and the attach type initiated by the CSFB user is combined attach.
• D. In the Attach request, the UE will report the LTE voice capability (whether CSFB or VoIP is supported) to the MME.

Answer: D

 

NEW QUESTION 23
Which channel in the DL 2CC CA does exist only in Pcell?

• A. PDCCH
• B. PHICH
• C. PUCCH
• D. PDSCH

Answer: C

 

NEW QUESTION 24
Which of the following descriptions is wrong about ULComp technology?

• A. UL Comp technology uses A3 measurement and SRS measurement in macro micro scenes
• B. UL Comp technology and joint reception of interference signals at adjacent stations improve signal-to-noise ratio
• C. UL Comp technology eNodeB needs to know the precise channel information of multiple transmission points to E
• D. UL Comp technology gain mainly comes from combined gain and interference cancellation gain

Answer: B

 

NEW QUESTION 25
Which of the following RNTIs use fixed values? (Multiple Choice)

• A. SI-RNTI
• B. SPS-RNTI
• C. P-RNTI
• D. C-RNTI

Answer: A,C

 

NEW QUESTION 26
In order to support the CSFB function, the SGS interface is not necessary.

• A. True
• B. False

Answer: B

 

NEW QUESTION 27
In the LTE protocol specification, which of the following protocol layers is not included in Layer 2?

• A. PDCP
• B. MAC
• C. RLC
• D. NAS

Answer: D

 

NEW QUESTION 28
In the case of NB-IoT and LTE sharing master control, which configuration of the following parameters will only affect NB-IoT and have no impact on LTE?

• A. Cell reference signal power configuration
• B. TAC configuration
• C. MME capability configuration
• D. Baseband board capability configuration

Answer: A

 

NEW QUESTION 29
LTE power control does not affect the coverage and capacity of the system.

• A. True
• B. False

Answer: B

 

NEW QUESTION 30
What is the maximum number of HARQ processes supported by the LTE FDD mode?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: C

 

NEW QUESTION 31
The resource block of the PUCCH channel is in the middle of the uplink frequency band.

• A. True
• B. False

Answer: B

 

NEW QUESTION 32
When the service-based handover measurement is initiated, if no handover is triggered, elNodeB will maintain E for continuous heterogeneous system measurements.

• A. True
• B. False

Answer: B

 

NEW QUESTION 33
How many configurations are there for R8 TDD special subframe configuration?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: C

 

NEW QUESTION 34
Which of the following devices is the core of the multimedia module, responsible for registration authentication, session control, and service triggering of the terminal?

• A. S-CSCF: Service CSCF
• B. PCRF
• C. P-CSCF: Proxy CSCF
• D. I-CSCF: Query CSCF

Answer: A

 

NEW QUESTION 35
If the timer T310 is set too large, the wireless link will become poor and cannot be used. The system will not delete the corresponding link for a long time. If the setting is too small, the call drop rate will increase.

• A. True
• B. False

Answer: A

 

NEW QUESTION 36
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