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NEW QUESTION 26
Which of the following are the trigger conditions for random access? (Multiple choice)
- A. Random access is required when switching
- B. Receiving downlink data in the RRC_CONNECTED state, requiring random access, that is, the UE is out of step when called
- C. RRC_IDLE initial access
- D. Initial access when the wireless link is disconnected
Answer: A,B,C,D
NEW QUESTION 27
According to the different coding rate, how many CCEs can the eNodeB aggregate to form a PDCCH to transmit common scheduling information?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B,C,D
NEW QUESTION 28
What state is the paging initiated by the UE?
- A. Idle state or connected state
- B. Only idle state
- C. Only connected state
Answer: A
NEW QUESTION 29
Which of the following radio bearers can carry NAS messages? (Multiple Choice)
- A. SRB3
- B. SRB2
- C. SRB1
- D. SRB0
Answer: B,C
NEW QUESTION 30
Which reason does the RRC connection setup failure not include?
- A. eNodeB rejects user access
- B. Authentication failure
- C. Weak coverage
Answer: B
NEW QUESTION 31
The SFBC is a transmit diversity technique, which obtains the transmit diversity gain primarily for the area with a lower SINR, such as a cell edge. Compared with STBC, SFBC is an empty frequency two-dimensional transmit diversity, while STBC is a space-time two-dimensional transmit diversity.
- A. True
- B. False
Answer: A
NEW QUESTION 32
Which of the following descriptions are issues that Massive MIMO technology can solve?
- A. High interference level
- B. Uplink coverage is limited
- C. High traffic growth
- D. High station over the line coverage
Answer: C
NEW QUESTION 33
About TDD and FDD contrast description, which is correct?
- A. LTE TDD is a time division system. When the terminal is allocated the same number of RB, the LTE TDD throughput rate is lower than the LTE FDD.
- B. The subframe ratio of LTE TDD makes the delay of some information feedback (such as HARQ ACK/NACK, or CQI) less than the delay of LTE FDD. Therefore, the RTT (Round-trip Time) of LTE TDD is slightly smaller than LTE FDD.
- C. Since the LTE TDD in GP present in such LTE TDD spectral efficiency slightly lower than LTE FDD.
- D. For 20MHz bandwidth cell, the FDD uplink and downlink each occupy 20MHz, and the TDD uplink and downlink share 20MHz.
Answer: B,C,D
NEW QUESTION 34
Which is the QCI of the video stream in the VoLTE solution?
- A. QCI=1
- B. QCI=9
- C. QCI=2
- D. QCI=5
Answer: C
NEW QUESTION 35
Which one of the following factors does not need to be considered by NB-IoT spectrum selection?
- A. Core network solution selection
- B. Frequency band
- C. Deployment method
- D. Interference
Answer: A
NEW QUESTION 36
Regarding the PDSCH resource allocation method, which of the following is correct?
- A. PDSCH resource allocation mode can be based on RB or RB pair
- B. PDSCH resource allocation mode 1 is based on RB allocation
- C. PDSCH resource allocation mode 2 uses Bitmap to indicate the specific allocated RB location.
- D. PDSCH resource allocation mode 0 is based on RB allocation
Answer: B
NEW QUESTION 37
Which of the following features cannot improve the PDCCH capacity of LTE? (Multiple choice)
- A. ROHC header compression
- B. TTI bundling
- C. Semi-static scheduling
- D. SRVCC
Answer: C,D
NEW QUESTION 38
Through IE combined query, you can view the IE statistics results when one or several IEs meet certain adjustments. How many queries can create up to per analysis set?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 39
The reporting period of the SRI (Scheduling Request Indicator) is divided into fixed and adaptive. Which of the following factors will be used for the adjustment of the SRI period? (Multiple Choice)
- A. The user establishes a bearer ARP.
- B. Number of users
- C. User establishes bearer QCI
- D. SRI resource load situation
Answer: A,B,D
NEW QUESTION 40
If the PCI of a cell is 32, which of the following is the value of the SSS of this cell?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 41
The virtual resource block (VRB) is used to describe the LTE downlink transmission resource allocation mode. What are the two resource mapping modes supported by the VRB? (Multiple choice)
- A. Centralized distribution
- B. Separate distribution
- C. Continuous distribution
- D. Discontinuous allocation
Answer: A,B
NEW QUESTION 42
How much ability of coverage is NB-IoT better than GSM?
- A. 15dB
- B. 10dB
- C. 20dB
- D. 25dB
Answer: C
NEW QUESTION 43
For the same-frequency switching scenario, which of the following parameters has little effect on the handover?
- A. ofn
- B. ocn
- C. ocs
- D. ofs
Answer: A
NEW QUESTION 44
Regarding the characteristics of the Internet of Things technology, which of the following descriptions is wrong?
- A. NB-IoT obtains better coverage through small bandwidth and uplink retransmission, and satisfies more scenarios.
- B. sigfox uses the same frequency bandwidth with the NB-IoT
- C. sigfox uses ultra-narrow bandwidth technology
- D. NB-IoT reduces power consumption through ultra-long TAU, PSM and other technologies.
Answer: B
NEW QUESTION 45
In order to improve the efficiency of importing and analyzing data, Assistant supports drive test log filtering. What types of filtering methods are divided into? (multiple choice)
- A. Filter by area
- B. Filter by combination of IE and time
- C. Filter by time
- D. Filter by IE
Answer: B,C,D
NEW QUESTION 46
Which of the following channels can change the modulation mode during the scheduling process?
- A. PDCCH
- B. PHICH
- C. PDSCH
- D. PUCCH
- E. PUSCH
Answer: C,E
NEW QUESTION 47
What are the differences between FDD-LTE and TDD-LTE? (Multiple Choice)
- A. Random access preamble format
- B. Reference signal
- C. Voice solution
- D. Sub-frame uplink and downlink configuration
Answer: A,B,D
NEW QUESTION 48
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