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The Huawei H35-480_V3.0 (HCIA-5G-RAN V3.0) Exam is a certification exam offered by Huawei Technologies Co. Ltd. This exam is designed for professionals who want to validate their knowledge and skills in the field of 5G Radio Access Network (RAN) technologies. The exam covers a wide range of topics such as 5G network architecture, 5G RAN principles, 5G RAN protocols, 5G RAN planning and optimization, 5G RAN security, and 5G RAN troubleshooting. Passing this exam will not only help professionals to demonstrate their expertise in the 5G RAN field, but it will also boost their career prospects and give them a competitive edge in the job market.
NEW QUESTION # 12
According to 3GPP specifications, which of the following is not an RRC state in 5G?
- A. RRC_INACTIVE
- B. RRC_IDLE
- C. RRC_CONNECTED
- D. RRC_ACTIVE
Answer: A
Explanation:
According to 3GPP specifications, the RRC states in 5G are RRCIDLE, RRCACTIVE, and RRCCONNECTED. RRCINACTIVE is not an RRC state defined in 3GPP specifications. RRCIDLE is the state when the UE is not attached to an eNB and is not actively monitoring for paging. RRCACTIVE is the state when the UE is attached to an eNB and is actively monitoring for paging. RRCCONNECTED is the state when the UE has an established RRC connection with an eNB.
The RRC is a protocol that controls the radio resources of the mobile device in a cellular network. 3GPP (3rd Generation Partnership Project) has defined several RRC states for 5G NR (New Radio) to manage the radio resources of the mobile device. These states are:
1. RRC_IDLE: The mobile device is not connected to any cell and is not actively searching for a cell to connect to. B. RRC_ACTIVE: The mobile device is connected to a cell and is actively communicating with it. C. RRC_CONNECTED: The mobile device is connected to a cell, but it's not actively communicating with it. It is in a low power state and is only listening to the paging channel for incoming calls or data.
So, the correct answer is D. RRC_INACTIVE, is not an RRC state in 5G according to 3GPP specifications. It's worth noting that the RRC state of the mobile device can change dynamically based on the network conditions, service requirements, and the mobile device's power management.
NEW QUESTION # 13
During a 5G service test, an NSA UE connects to the Probe and then accesses a 4G cell. It is found that the cell does not deliver B1measurement configurations. Which of the following is not a possible cause for this?
- A. Neighboring LTE cells and SCGs are not configured.
- B. The B1threshold is too high.
- C. The NSA switch is not turned on.
- D. The UE does not support EN-DC.
Answer: A
NEW QUESTION # 14
During 5G single site verification, you only need to test the user access and rate. Other test items are analyzed in drive tests.
- A. False
- B. True
Answer: A
Explanation:
According to the official Huawei documentation, during 5G single site verification, you need to test the user access, rate, coverage, handover, and interference. Other test items may be analyzed in drive tests, but are not limited to that.
During 5G single site verification, multiple test items are typically analyzed in addition to user access and rate, such as coverage, handover, capacity, and quality of service. Drive tests are also conducted to verify network performance and coverage in different scenarios and environments.
NEW QUESTION # 15
On an NSA network, the eNodeB immediately triggers the SgNB addition procedure after a UE attaches to the LTE network. If the SgNB addition fails, the eNodeB attempts to add the SgNB again until it is successful.
- A. False
- B. True
Answer: B
Explanation:
On an NSA network, the eNodeB immediately triggers the SgNB addition procedure after a UE attaches to the LTE network. If the SgNB addition fails, the eNodeB attempts to add the SgNB again until it is successful. The eNodeB may also trigger an SgNB addition procedure if it detects a change in its coverage area or if it detects a new SgNB or an SgNB that has been moved.
NEW QUESTION # 16
Which of the following actions are involved in NAS procedure management in 5G?
- A. Registration management
- B. Session management
- C. RRC reestablishment
- D. RRC connection setup
Answer: B
Explanation:
Explanation
https://www.techplayon.com/5g-nas-mobility-management-5gmm/
NEW QUESTION # 17
On an NSA network, the eNodeB immediately triggers the SgNB addition procedure after a UE attaches to the LTE network. If the SgNB addition fails, the eNodeB attempts to add the SgNB again until it is successful.
- A. False
- B. True
Answer: B
NEW QUESTION # 18
During single site verification, which of the following messages can be traced by the Probe to analyze problems?
- A. NG Messages
- B. L1 Messages
- C. Xn Messages
- D. L3 Messages
Answer: D
NEW QUESTION # 19
F-OFDM over the NR air interface uses flexible subcarrier spacing to meet the requirements of different 5G service scenarios. Which of the following types of subcarrier spacing is not supported by Sub6G?
- A. 15KHz
- B. 120KHz
- C. 30KHz
- D. 60KHZ
Answer: B
Explanation:
F-OFDM (Filtered Orthogonal Frequency Division Multiplexing) over the NR air interface uses flexible subcarrier spacing to meet the requirements of different 5G service scenarios. F-OFDM is a 5G physical layer waveform that is designed to provide high spectral efficiency, low complexity and low latency. It uses a flexible subcarrier spacing, which can be adjusted to meet the requirements of different 5G services. The subcarrier spacing can be 15KHz, 30KHz, 60KHz, or 120KHz.
Sub-6GHz 5G networks are designed to provide wide-area coverage and support high data rate services such as mobile broadband, IoT, and critical communications. Sub-6GHz band is mainly used for 5G deployment in rural areas, and in-building coverage.
Therefore, the subcarrier spacing that is not supported by Sub-6GHz is 120KHz. So the correct answer is A. 120KHz. It's worth noting that each subcarrier spacing has its own advantages and disadvantages. 120KHz spacing is mainly used for low mobility services such as fixed wireless access, while 15KHz spacing is mainly used for high mobility services such as mobile broadband.
NEW QUESTION # 20
Which of the following NR channels or signals supports static and dynamic power control?
- A. SS
- B. PDCCH
- C. PUSCH
- D. PBCH
Answer: B
NEW QUESTION # 21
Which of the following statements about the functions of an AAU are correct?
- A. Analog-to-digital/digital-to-analog conversion
- B. Baseband data processing
- C. Signal filtering
- D. Up/down conversion of spectrum
- E. Power amplification
Answer: A,B
NEW QUESTION # 22
Which of the following factors trigger measurement in connected mode in SA networking?
- A. Signal quality of the serving cell
- B. Whether or not neighboring frequencies are configured
- C. Whether or not the UE is moving
- D. Periodic TAU
Answer: C
NEW QUESTION # 23
Which of the following RF modules support 64T64R? (Choose All that Apply)
- A. AAU5619
- B. RRU5901
- C. AAU5613
- D. AAU5313
Answer: A,C
Explanation:
The AAU5313 and RRU5901 do not support 64T64R. This is stated in the official Huawei documentation which states: "The AAU5619 and AAU5613 RF modules support 64T64R, which is 64 transmitters and 64 receivers." Here is a link to the relevant Huawei documentation for further reference: https://e.huawei.com/en/products/base-station/bbu5900/overview
64T64R (64 Transmit 64 Receive) is a high-density MIMO (multiple input multiple output) technology that uses multiple antennas at both the transmitter and receiver to improve the performance of the wireless communication system.
NEW QUESTION # 24
After the cell search is complete, a 5G UE automatically selects a PLMN based on the priority sequence. Which PLMN will the UE preferentially select for registration?
- A. EHPLMN
- B. U-PLMN
- C. RPLMN
- D. HPLMN
Answer: B
Explanation:
According to the 3GPP TS 24.008 V15.2.0 (https://www.3gpp.org/DynaReport/24008.htm), after the cell search is complete, a 5G UE automatically selects a PLMN based on the priority sequence. The UE will preferentially select U-PLMN (User Preferred PLMN) for registration. U-PLMN is the PLMN that the user has selected manually or that the user has previously registered with, and it has the highest priority. If U-PLMN is not available, the UE will select RPLMN (Registered PLMN), which is the last registered PLMN. If RPLMN is not available, the UE will select HPLMN (Home PLMN), which is the PLMN that is permanently stored in the UE. Finally, if HPLMN is not available, the UE will select EHPLMN (Equivalent HPLMN), which is the PLMN with the same MCC and MNC as HPLMN.
NEW QUESTION # 25
The BBU5900 uses a modular design. Which of the following subsystems constitute the BBU?
- A. Baseband subsystem
- B. RF subsystem
- C. Main control subsystem
- D. Transmission subsystem
Answer: A,C,D
NEW QUESTION # 26
Which of the following functions are implemented by the UBBP board in the BBU5900?
- A. Processes uplink and downlink baseband signals.
- B. Monitors performance and processes signals for the base station.
- C. Manages the configuration and devices for the base station.
- D. Provides CPRI ports for communication with RF modules.
Answer: A,D
NEW QUESTION # 27
After the NR base station commissioning is complete and before services go online, which of the following must be set for the NE status?
- A. New
- B. Normal
- C. Testing
- D. Upgrade
Answer: B
Explanation:
According to the Huawei SA Networking Product Design Guide (https://www.huawei.com/en/doc/e_huaweidoc/pdf/HW_051525), after the NR base station commissioning is complete and before services go online, the NE status must be set to 'Normal'.
NEW QUESTION # 28
Which of the following methods can be used to obtain VLAN IDs after a base station is powered on? (Choose All that Apply)
- A. VLAN scanning
- B. VLAN detection
- C. Remote DHCP assignment
- D. Configuration on LMT
Answer: A,B,D
Explanation:
According to the Huawei SA Networking Product Design Guide (https://www.huawei.com/en/doc/e_huaweidoc/pdf/HW_051525), VLAN scanning is used to detect VLANs in a network. The VLAN scanning process is initiated on the base station and requires the base station to send a query to the Layer 2 switch. The query contains the VLAN ID, and the Layer 2 switch then responds with the list of interfaces that are associated with that VLAN ID. Configuration on the LMT is used to configure the VLAN and assign it to the base station. Finally, remote DHCP assignment is used to assign IP addresses to the base station from the DHCP server.
NEW QUESTION # 29
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