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NEW QUESTION 33
Regarding the re-election of the community, which of the following statements is wrong?
- A. Same frequency neighbors have the same priority
- B. The larger the neighboring cell offset value CellQoffset, the harder it is to reselect the cell.
- C. The priority of the inter-frequency neighboring area must be different from the serving cell
- D. The serving cell and the inter-frequency system neighboring cell reselection priority are sent to the UE through the system message in the cell broadcast.
Answer: C
NEW QUESTION 34
PDCCH/ePDCCH is used to transmit DCI (Downlink Control Information). Which of the following information does the DCI include?
- A. Power Control Command
- B. Downlink authorization
- C. Uplink authorization
- D. Scheduling strategy
Answer: A,B,C,D
NEW QUESTION 35
Which of the following are the network interfaces of the LTE system? (Multiple choice)
- A. X2
- B. S5
- C. IUB
- D. S1-MME
Answer: A,B,D
NEW QUESTION 36
Which identifier might be when ATS update to HSS via PUR message?
- A. C-MSISDN
- B. ATU-STI
- C. PSI
- D. STN-SR
Answer: D
NEW QUESTION 37
If the cell radius is 90 kilometers, which of the following should be used for the PRACH preamble format?
- A. Format 2
- B. Format 1
- C. Format 4
- D. Format 3
Answer: D
NEW QUESTION 38
eNodeB can be performed by which way to UTRAN of CS Fallback? (Multiple choice)
- A. CA Fallback based on CCO / NACC
- B. CS Fallback based on PS redirection
- C. CA Fallback based on PS switching
- D. Fast (flash) CS Fallback
Answer: A,C,D
NEW QUESTION 39
Which of the following processes belongs to NAS ESM?
- A. EPS bearer setup
- B. Attach
- C. Authentication
- D. Tracking area update
Answer: A
NEW QUESTION 40
Which of the following are methods that can be used to solve a weak coverage problem? (Multiple choice)
- A. Adjust the weight of the sector beam of the primary coverage cell to make the energy more concentrated
- B. Adjust the antenna tilt and azimuth of the main coverage area
- C. Reduce the signal strength of the non-primary coverage cell and improve the SINR of the primary coverage cell signal
- D. If the power of the primary coverage cell does not reach the rated maximum, the power of the primary coverage cell is appropriately increased.
Answer: B,C,D
NEW QUESTION 41
An EPS bearer uniquely identifies all traffic flows of the same QoS between a UE and a serving gateway.
- A. False
- B. True
Answer: B
NEW QUESTION 42
Regarding the basic characteristics of NB-IoT technology, which of the following descriptions is wrong?
- A. Low power consumption
- B. Low cost (<$5)
- C. Deep coverage
- D. Applicable to big bag business
Answer: D
NEW QUESTION 43
Which channel coding method and coding rate are used by DCI?
- A. Tail biting convolutional coding, 1/2
- B. Turbo coding, 1/3
- C. Turbo coding, 1/2
- D. Tail biting convolutional coding, 1/3
Answer: D
NEW QUESTION 44
The purpose of PRACH power control is to transmit the preamble with as little power as possible under the premise of ensuring the success rate of random access of the eNodeB.
- A. False
- B. True
Answer: B
NEW QUESTION 45
Regarding indoor distribution antennas and components, which of the following statement is wrong?
- A. Power splitter: Split one signal into two or more channels (three-way, four-way) output
- B. Try to use "high power, less antenna" for indoor antenna layout
- C. Attenuator: consuming the excessive energy of RF signal, mainly used to reduce signal level and avoid the influence of overflow
- D. The leaky cable can be regarded as a kind of slot antenna, suitable for coverage in tunnels, subways, etc.
Answer: B
NEW QUESTION 46
Regarding PHICH, what is wrong description of the following?
- A. PHICH channel may be assigned on the first 3 OFDM symbol
- B. Maximum code division multiplexing 4 users in the PHICH channel group
- C. PHICH channels may be assigned only on the first OFDM symbol of subframe
- D. Downlink commonly used HARQ feedback modes are Bundling and Multiplexing
Answer: B
NEW QUESTION 47
Which of the following channels is used for resource allocation for paging and user data?
- A. Downlink shared physical channel
- B. Physical paging channel
- C. Physical downlink control channel
- D. Physical broadcast channel
Answer: C
NEW QUESTION 48
The attach type initiated by VoLTE user is EPS-attach, and the attach type initiated by CSFB user is combined attach.
- A. False
- B. True
Answer: A
NEW QUESTION 49
Which of the following is used to uniquely identify the UE corresponding to the S1 interface in the same eNB?
- A. MME UE S1AP ID
- B. New eNB UE X2AP ID
- C. C-RNTI
- D. eNB UE S1AP ID
Answer: D
NEW QUESTION 50
Which of the CSFB to GSM solutions has the largest delay?
- A. Fast CSFB
- B. PS switching
- C. PS redirection
- D. CCO
Answer: C
NEW QUESTION 51
The SAE-GW is a combination of two network elements, SGW and PGW.
- A. False
- B. True
Answer: B
NEW QUESTION 52
Which of the following options are advantages of space division multiplexing? (Multiple choice)
- A. User peak rate can be improved
- B. System capacity can be improved
- C. Does not change the existing distributed antenna structure, only the signal source access mode changes
- D. Convenient construction
Answer: B,C,D
NEW QUESTION 53
Which reason does the RRC connection setup failure not include?
- A. Weak coverage
- B. eNodeB rejects user access
- C. Authentication failure
Answer: C
NEW QUESTION 54
Event B2 indicates that the signal quality of the heterogeneous neighboring cell becomes higher than the corresponding threshold.
- A. False
- B. True
Answer: A
NEW QUESTION 55
According to the road test, it is found that there are co-channel interferences in the two base stations A and B in a local network. Which of the following measures cannot effectively reduce the co-channel interference of the two stations?
- A. Reduce the distance between the two base stations A and B
- B. Lower the antenna height of the base stations A and B and increase the antenna downtilt angle
- C. Adjust the frequency of the interfered cell in the base stations A
- D. Using technologies such as power control
Answer: A
NEW QUESTION 56
Regarding the peak rate and antenna settings of the LTE system, which of the following is correct?
- A. The uplink peak rate indicator needs to be met when the base station is configured with 1 receiving antennas.
- B. The downlink peak rate indicator needs to be met when the UE is configured with 2 receiving antennas.
- C. The uplink peak rate indicator needs to be met when the UE is configured with 1 receiving antennas.
- D. The downlink peak rate indicator needs to be met when the base station is configured with 2 receiving antennas.
Answer: C
NEW QUESTION 57
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