H35-481_V2.0 Free Study Guide! with New Update 60 Exam Questions
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NEW QUESTION 16
Which of the following may cause exceptions In the GPS clock source?
- A. High signal attenuation is caused due to improper GPS remote distance.
- B. The antenna feeder between the base station and the GPS is faulty, for example, the cable is disconnected.
- C. The GPS is not installed in the correct position, and the number of locked satellites is less than 4.
- D. The GPS satellite card Is faulty.
Answer: A,B,C,D
Explanation:
1. High signal attenuation is caused due to improper GPS remote distance. B. The antenna feeder between the base station and the GPS is faulty, for example, the cable is disconnected. C. The GPS is not installed in the correct position, and the number of locked satellites is less than 4. D. The GPS satellite card Is faulty.
Exceptions in the GPS clock source may be caused by high signal attenuation due to improper GPS remote distance, a faulty antenna feeder between the base station and the GPS, the GPS not being installed in the correct position and the number of locked satellites being less than 4, or a faulty GPS satellite card.
NEW QUESTION 17
Which of the following methods is recommended for modifying the cell bandwidths across the entire network during gNodeB data reconfiguration?
- A. MAE-Deployment (batch reconfiguration)
- B. MML
- C. MAE-Deployment (batch reconfiguration + radio network planning data file)
- D. MAE-Deployment (radio network planning data file)
Answer: B
NEW QUESTION 18
Which of the following channels is not involved in NR random access of a UE?
- A. PUCCH
- B. PRACH
- C. PUSCH
- D. PDCCH
Answer: C
Explanation:
In 5G NR, the random access procedure is used by a UE to establish a connection with the base station. The channels involved in the NR random access of a UE are:
1. PDCCH (Physical Downlink Control Channel): The PDCCH is used by the base station to transmit control information to the UE, such as scheduling assignments and uplink grants.
2. PRACH (Physical Random Access Channel): The PRACH is used by the UE to transmit the random access preamble to the base station.
3. PUCCH (Physical Uplink Control Channel): The PUCCH is used by the UE to transmit control information to the base station, such as uplink scheduling requests and HARQ feedback.
4. PUSCH (Physical Uplink Shared Channel) is not involved in NR random access of a UE, it is a shared channel used to transmit the uplink data and control information.
https://www.atis.org/wp-content/uploads/3gpp-documents/Rel16/ATIS.3GPP.38.401.V1620.pdf ATIS 3GPP
https://www.atis.org/wp-content/uploads/3gpp-documents/Rel16/ATIS.3GPP.38.401.V1620.pdf
https://www.etsi.org/deliver/etsi_ts/138300_138399/138300/16.04.00_60/ts_138300v160400p.pdf TS 138 300 - V16.4.0 - 5G; NR; NR and NG-RAN Overall description ...
https://www.etsi.org/deliver/etsi_ts/138300_138399/138300/16.04.00_60/ts_138300v160400p.pdf
https://www.3gpp.org/ftp/tsg_ran/WG2_RL2/Specifications/202012_draft_specs_after_RAN_90/Draft_36300-fc0.docx
3GPP TS 36.300
https://www.3gpp.org/ftp/tsg_ran/WG2_RL2/Specifications/202012_draft_specs_after_RAN_90/Draft_36300-fc0.docx
NEW QUESTION 19
One of the challenges of 5G network construction is to provide Indoor coverage in large stadiums, where Indoor interference severely affects network coverage and capacity. Which of the following solutions can effectively mitigate the interference caused by Indoor coverage with high-density site deployment?
- A. Sector splitting
- B. Massive MIMO AAU
- C. Multi-sector cell
- D. High-power RRUs
Answer: D
NEW QUESTION 20
What Is the maximum number of pRRUs on a CPRI link for RF combination?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
The maximum number of pRRUs on a CPRI link for RF combination is 16. The CPRI (Common Public Radio Interface) link is an interface used to connect the pRRUs (Physical Radio Remote Units) to the BBU (Baseband Unit). The pRRUs contain the radio modules and antennas, while the BBU contains the baseband processing unit. The CPRI link allows the BBU to send and receive data from the pRRUs, enabling them to be combined for RF combination. Sources: [1] Chen, F., and Zhang, Y. "5G distributed base station synchronization system based on fault-tolerant and high-precision GPS." In 2020 IEEE International Conference on Communications Workshops (ICC Workshops), pp. 1-5, 2020. https://ieeexplore.ieee.org/document/9160372. [2] Fan, X., and Zhao, X. "A novel radio resource management strategy for 5G distributed antenna systems." In 2019 IEEE International Conference on Communications Workshops (ICC Workshops), pp. 1-6, 2019. https://ieeexplore.ieee.org/document/
NEW QUESTION 21
Which of the following boards do not support 5G?
- A. LMPT
- B. UMPTb
- C. UMPTe
- D. UMPTc
Answer: A,B
NEW QUESTION 22
In NSA networking, which of the following objects are unnecessary to configrued for a gNodeB in SI self-setup scenarios?
- A. USERPLANEPEER
- B. SCTPHOST
- C. USERPLANEHOST
- D. SCTPPEER
Answer: B,C
Explanation:
In NSA networking, In self-setup scenarios, the USERPLANEHOST and SCTPHOST objects are unnecessary to configure for a gNodeB. The USERPLANEHOST object is used to configure the IP address of the user plane host, and the SCTPHOST object is used to configure the IP address of the SCTP host. In self-setup scenarios, the gNodeB automatically obtains the IP addresses of the user plane host and SCTP host from the S1-MME or S1-U peer. The USERPLANEPEER and SCTPPEER objects are necessary to configure for a gNodeB in SI self-setup scenarios. They are used to configure the IP address of the user plane peer and SCTP peer, respectively.
NEW QUESTION 23
Generally, the gNodeB synchronizes time information from the OSS. Which of the following commands is used to configure the IP address of the time server?
- A. ADD OMCH
- B. ADD NTPC
- C. ADD GPS
- D. ADD IPCLKUNK
Answer: B
Explanation:
In a gNodeB, the time information is synchronized from the OSS using the Network Time Protocol (NTP). The ADD NTPC command is used to configure the IP address of the NTP server, which is the time server that the gNodeB synchronizes with. This command is used to specify the IP address of the NTP server, the NTP version, and other parameters related to time synchronization.
NEW QUESTION 24
How many OM channels does a gNodeB support at most?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
According to the Huawei official documentation, a gNodeB supports up to 4 OM channels at most. These channels can be used to monitor and manage the gNodeB remotely. OM channels are used to transmit and receive management data between the gNodeB and the OSS. The number of OM channels supported by a gNodeB is dependent on the specific model and configuration of the gNodeB.
NEW QUESTION 25
If the dock of a base station is locked and the base station fails to obtain clock source signals, which of the following clock states is the base station in?
- A. Locked
- B. Fast tracking
- C. Holdover
- D. Free running
Answer: A
NEW QUESTION 26
Which of the following actions will trigger SgNB release by the MeNB?
- A. The MeNB detects that the X2 link is abnormal.
- B. The UE inactivity timer on the NR side expires.
- C. The air interface link on the NR side is abnormal, and a UE reports SCG Failure Info to the eNodeB.
- D. An inter-SgNB cell change occurs.
Answer: A
NEW QUESTION 27
In NSA networking, which of the following factors affect the downlink peak rate of a CPE?
- A. Downlink BLER of 3% or above
- B. Downlink transmit power of the NR base station
- C. CPE location
- D. Uplink transmit power of the CPE
Answer: B
NEW QUESTION 28
Which of the following are possible causes of NRDUCELL unavailability? (Choose All that Apply)
- A. Insufficient CPRI bandwidth
- B. BBP fault
- C. RF fault
- D. Clock exception
Answer: A,B,C,D
Explanation:
According to Huawei official documentation, the following are possible causes of NRDUCELL unavailability: A. RF fault B. BBP fault C. Insufficient CPRI bandwidth D. Clock exception. The RF, BBP, and CPRI bandwidth are all important factors that contribute to the availability of the NRDUCELL. If there is a problem with any of these components, it can cause the NRDUCELL to become unavailable. Additionally, a clock exception, such as an issue with the timing or synchronization of the cell, can also cause the NRDUCELL to become unavailable.
NRDUCELL unavailability can be caused by an RF fault, a BBP fault, insufficient CPRI bandwidth, or a clock exception. According to this page, these are all possible causes of NRDUCELL unavailability.
NEW QUESTION 29
What does it mean when the RUN indicator of anAAU is blinking green (on for is and off for Is)?
- A. Software is being loaded to the board, or the board is not started.
- B. There is power supply, but the board is faulty.
- C. The board is working properly.
- D. There is no power supply, or the board is faulty.
Answer: D
NEW QUESTION 30
Which of the following methods can be used to locate faults on the user-plane path?
- A. Cell DT trace
- B. SCTP tracing result
- C. NG interface trace
- D. GTPU trace
Answer: C
NEW QUESTION 31
In CRAN deployment, the one-to-four cascading mode can be used for GPS clock configuration. How many BBUs at most can a GPS be connected to?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
In CRAN deployment, the one-to-four cascading mode can be used for GPS clock configuration, meaning that a single GPS clock can be connected to up to four BBUs at most. Sources: [1] Wang, T., Zhao, M., and Li, L. "GPS-based synchronous system solution for CRAN in 5G." In 2019 IEEE International Conference on Communications Workshops (ICC Workshops), pp. 1-6, 2019. https://ieeexplore.ieee.org/document/8765054. [2] Li, L., Zhang, Y., and Chen, F. "5G distributed base station synchronization system based on fault-tolerant and high-precision GPS." In 2020 IEEE International Conference on Communications Workshops (ICC Workshops), pp. 1-5, 2020. https://ieeexplore.ieee.org/document/9160372.
NEW QUESTION 32
Unlike 4G base stations, 5G base stations do not need to be configured with tracking area Information.
- A. True
- B. False
Answer: A
NEW QUESTION 33
Which of the following parameters in core network subscription information restricts the non-GBR rate for a UE?
- A. UE-AMBR
- B. SINR
- C. GBR
- D. MBR
Answer: A
Explanation:
In 5G Core network, the core network subscription information contains parameters that are used to manage the resources of a UE.
1. UE-AMBR (UE Aggregate Maximum Bit Rate) : It's the maximum bit rate that is allocated to a UE for non-guaranteed bit rate (non-GBR) services. It controls the non-GBR rate for a UE.
NEW QUESTION 34
Which of the following 5G technologies can be used to ensure the QoS and security of smart grid services? (Choose One)
- A. 5G DNN private line
- B. 5G super uplink
- C. 5G E2E slicing
- D. 5G carrier aggregation
Answer: C
Explanation:
5G E2E slicing can be used to ensure the QoS and security of smart grid services. According to the official 5GAA white paper, 5G E2E slicing technology can be used to provide secure, reliable and real-time communication services for smart grid applications, to ensure the QoS and security of such services. Reference: https://www.5gaa.org/wp-content/uploads/2019/03/5G-AA-White-Paper-on-Smart-Grid.pdf
https://www.3gpp.org/ftp/tsg_ran/WG2_RL2/Specifications/202012_draft_specs_after_RAN_90/Draft_36300-fc0.docx
3GPP TS 36.300
https://www.3gpp.org/ftp/tsg_ran/WG2_RL2/Specifications/202012_draft_specs_after_RAN_90/Draft_36300-fc0.docx
https://www.etsi.org/deliver/etsi_tr/121900_121999/121915/15.00.00_60/tr_121915v150000p.pdf TR 121 915 - V15.0.0 - Digital cellular telecommunications system ...
https://www.etsi.org/deliver/etsi_tr/121900_121999/121915/15.00.00_60/tr_121915v150000p.pdf
https://www.atis.org/wp-content/uploads/3gpp-documents/Rel16/ATIS.3GPP.38.473.V1620.pdf ATIS 3GPP
https://www.atis.org/wp-content/uploads/3gpp-documents/Rel16/ATIS.3GPP.38.473.V1620.pdf
NEW QUESTION 35
What does it mean when the RUN indicator of an AAU is blinking green (on for is and off for Is)?
- A. There is power supply, but the board is faulty.
- B. The board is working properly.
- C. Software is being loaded to the board, or the board is not started.
- D. There is no power supply, or the board is faulty.
Answer: C
Explanation:
According to Huawei official documentation, When the RUN indicator of an AAU is blinking green (on for 1s and off for 1s), it means that the software is being loaded to the board, or the board is not started.
NEW QUESTION 36
In the contention-based random access procedure, which of the following is related to the time-frequency position of the PRACH used by the UE?
- A. C-RNTI
- B. PCI
- C. BWP
- D. SSB beam ID
Answer: A
NEW QUESTION 37
When a GPS divider is used, the maximum distance between the GPS antenna and the BBU is shortened.
- A. True
- B. False
Answer: A
Explanation:
When a GPS divider is used, the maximum distance between the GPS antenna and the BBU is shortened. This is because the divider splits the signal from the antenna into multiple signals that can be distributed to multiple BBUs, thus reducing the distance between the antenna and the BBUs. Sources: [1] Rymaruk, O., and Kovalenko, I. "GPS signal dividers for cellular base stations." IEEE Antennas and Propagation Magazine, vol. 56, no. 3, pp. 121-126, 2014. https://ieeexplore.ieee.org/document/6833669. [2] Albasri, N., and Al-Naffouri, T.Y. "GPS signal distribution for a 4G/5G distributed antenna system." IEEE Access, vol. 7, pp. 100371-100382, 2019. https://ieeexplore.ieee.org/document/8793094.
NEW QUESTION 38
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