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NEW QUESTION 22
Which of the following descriptions is correct?
- A. The attach type initiated by the VoLTE user is EPS-attach, and the attach type initiated by the CSFB user is combined attach.
- B. 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.
- C. In the Attach request, the UE will report the LTE voice capability (whether CSFB or VoIP is supported) to the MME.
- D. There are default bearers and dedicated bearers in LTE. Voices for VoIP must use dedicated bearers.
Answer: C
NEW QUESTION 23
At present, the 8-channel smart antenna used in TD-LTE has 9 ports on the RRU and the antenna. If the ports between them are not connected according to the specifications, what are the abnormalities that may occur during the test? (Multiple Choice)
- A. The impact on the uplink service rate is not obvious, and the UL SIR has no steep drop phenomenon.
- B. There is not much change in DL RSRP, and the DL SIR value has a steep drop.
- C. The download rate fluctuates greatly and the average rate is low.
- D. The larger the amount of downloaded data, the more obviously the DL SIR steep drop. The DL SINR steep drop is not obviously when the business is not done or the small data download is performed.
Answer: A,B,C,D
NEW QUESTION 24
Under the LTE network, the TA is used for paging location management, so the smaller the TA plan is, the better.
- A. False
- B. True
Answer: A
NEW QUESTION 25
RSRP reference signal received power refers to the average signal power received by all REs of a Symbo bearer Reference Signa within the measured frequency bandwidth.
- A. False
- B. True
Answer: B
NEW QUESTION 26
The UE is in the out-of-step state. If there is downlink data service, how is the UE 's random access procedure handled?
- A. Notifying the UE through the RRC reconfiguration message
- B. Randomly select the contention sequence through the UE PDCP layer
- C. Notifying the UE through the PDCCH Order
- D. Randomly select the contention sequence through the UE MAC layer
Answer: A
NEW QUESTION 27
Which S1 message is used to trigger the CSFB service?
- A. Extended service request
- B. Initial UE message
- C. Service request
- D. Initial UE context establishment response
Answer: A
NEW QUESTION 28
How long is the TTI of the MIB (master information block)?
- A. 10ms
- B. 80ms
- C. 40ms
- D. 1ms
Answer: C
NEW QUESTION 29
Which of the following LTE-A technologies can increase the port rate of mobile phone users? (Multiple Choice)
- A. High-order MIMO
- B. Carrier Aggregation CA
- C. eRelay
- D. 256QAM
Answer: A,B,D
NEW QUESTION 30
In order to support the CSFB function, the SGS interface is not necessary.
- A. False
- B. True
Answer: A
NEW QUESTION 31
The LTE system PDCCH uses blind detection. What is the maximum number of blind detections for a terminal?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 32
In handover based on frequency priority, event A1 is used to stop inter-frequency measurement.
- A. False
- B. True
Answer: A
NEW QUESTION 33
What are the gains from UL Comp technology? (Multiple Choice)
- A. Interference cancellation gain
- B. Array gain
- C. Signal combining gain
- D. Power gain
Answer: A,B,C
NEW QUESTION 34
What are the differences between FDD-LTE and TDD-LTE? (Multiple Choice)
- A. Sub-frame uplink and downlink configuration
- B. Random access preamble format
- C. Voice solution
- D. Reference signal
Answer: A,B,D
NEW QUESTION 35
The PDCCH, PCFICH, and PHICH are mapped to the control region in the subframe.
- A. False
- B. True
Answer: A
NEW QUESTION 36
Unlike the 2/3G network, the concept of reselection priority is introduced in the LTE system. Which of the following is correct? (Multiple choice)
- A. By configuring the priority of each frequency point, the network can more easily guide the terminal to re-elect to the high-priority cell to achieve balanced network load: improve resource utilization, ensure UE signal quality, etc.
- B. The priority configuration unit is the frequency point, so different cells in the same carrier frequency have the same priority.
- C. In the LTE system, the network can configure the priorities of different frequency points or frequency groups and provide broadcasts to inform the UE in the system message that the corresponding parameter is CellReselectionPriority, and the value is (0....7).
Answer: A,B,C
NEW QUESTION 37
What are the control information that PUCCH can carry? (Multiple Choice)
- A. Scheduling request
- B. Uplink channel quality feedback
- C. Downlink channel quality feedback
- D. Downlink HARQ feedback
Answer: A,C,D
NEW QUESTION 38
Which of the following user SIP URI formats is correct?
- A. SIP: [email protected]
- B. +8675588888888
- C. [email protected]
- D. TEL:8675588888888
Answer: A
NEW QUESTION 39
Carrier aggregation, if basic scheduling is used, on PCe11 and SCe11, CAUE is regarded as an independent one to allocate resources, and the CAE rate is higher than non-CAE.
- A. False
- B. True
Answer: B
NEW QUESTION 40
What does 2T2R SFBC mean in MIMO antenna configuration?
- A. Transmission diversity, high rate
- B. Spatial multiplexing, the rate is not high
- C. Spatial multiplexing, high rate
- D. Transmission diversity, the rate is not high
Answer: D
NEW QUESTION 41
When the UE performs TA update, which message does the HSS send the user subscription data to the MME?
- A. Create session Request
- B. Update Location answer
- C. Modify bearer request
- D. Insert Subscriber data
Answer: B
NEW QUESTION 42
Which of the following factors will affect the download rate of LTE? (Multiple Choice)
- A. Frequency bandwidth of the cell
- B. MCS adopted
- C. Whether to adopt 2*2MIMO
- D. Number of symbols occupied by the PDCCH
Answer: A,B,C,D
NEW QUESTION 43
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