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NEW QUESTION # 12
Which of the following devices is used to implement service slicing on the 5G RAN side?
- A. AAU
- B. RRU
- C. BBU
- D. Antenna
Answer: C
Explanation:
On the 5G RAN side, Service Slicing is implemented using a Base Band Unit (BBU). A BBU is a device that performs baseband processing functions, such as modulation, demodulation, and encoding/decoding of signals. It is also responsible for the connection to the core network and the management of the radio resources. In 5G, BBU is a key component to support service slicing, where different services can be assigned different slices of the network resources, such as bandwidth, power, and quality of service. This allows for more efficient use of resources and better management of different types of traffic, such as broadband and low latency services.
NEW QUESTION # 13
Which of the following messages is the first message sent by a gNodeB to an AMF?
- A. NGAP_INIT_UE_MSG
- B. NGAP_UL_NAS_TRANSP
- C. RRC_SETUP
- D. NGAP_INIT_CONTEXT_SETUP_RSP
Answer: A
Explanation:
According to the official Huawei documentation, the first message sent by a gNodeB to an AMF is NGAP_INIT_UE_MSG. This message is used to initiate a connection between the gNodeB and AMF.
NEW QUESTION # 14
SSB GSCN is the center frequency number of an NR cell.
- A. False
- B. True
Answer: A
NEW QUESTION # 15
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
NEW QUESTION # 16
Which of the following NR slot configurations are defined in 3GPP specifications? (Choose All that Apply)
- A. Mixed slot, which contains at least one downlink/uplink symbol while other symbols can be flexibly configured
- B. Downlink-only slot (all symbols are dedicated for downlink)
- C. Uplink-only slot (all symbols are dedicated for uplink)
- D. Flexible-slot (all symbols are flexibly configured)
Answer: A,B,C,D
Explanation:
1. Mixed slot is a slot configuration in which at least one downlink/uplink symbol is present, while other symbols can be flexibly configured for downlink or uplink transmission. This allows for a more efficient use of resources and better support for different types of services. B. Flexible-slot is a slot configuration in which all symbols are flexibly configured for downlink or uplink transmission. This allows for a more efficient use of resources and better support for different types of services. C. Downlink-only slot is a slot configuration in which all symbols are dedicated for downlink transmission, This configuration is mainly used for downlink-centric services such as video streaming or software downloads. D. Uplink-only slot is a slot configuration in which all symbols are dedicated for uplink transmission, this configuration is mainly used for uplink-centric services such as voice calls or video conferencing.
NEW QUESTION # 17
Which of the following NR channels or signals supports static and dynamic power control?
- A. PBCH
- B. SS
- C. PUSCH
- D. PDCCH
Answer: D
NEW QUESTION # 18
Which of the following MML commands is used to bind a physical sector to an AAU on a gNodeB?
- A. ADD SECTOR
- B. ADD NRCELL
- C. ADD NRLOCELL
- D. ADD NRDUCELLCOVERAGE
Answer: C
Explanation:
According to the Huawei SA Networking Product Design Guide (https://www.huawei.com/en/doc/e_huaweidoc/pdf/HW_051525), the MML command used to bind a physical sector to an AAU on a gNodeB is 'ADD NRLOCELL'.
NEW QUESTION # 19
The BBU5900 uses a modular design. Which of the following subsystems constitute the BBU? (Choose All that Apply)
- A. Baseband subsystem
- B. Main control subsystem
- C. Transmission subsystem
- D. RF subsystem
Answer: A,B,C
Explanation:
Control subsystem: It is responsible for managing and controlling the overall operation of the BBU, it provides functions such as system initialization, software management, and alarm management.
Transmission subsystem: It is responsible for the transmission of data between the baseband subsystem and the RF subsystem, it includes functions such as data encoding, modulation, and multiplexing.
Baseband subsystem: It performs the baseband processing for the BBU, it includes functions such as demodulation, decoding, and demultiplexing.
NEW QUESTION # 20
In the inter-site DC solution, the X2 interface can be used to implement transmission interconnection between the LTE and NR sites. Which of the following is the requirement of the transmission delay in such case?
- A. <10ms
- B. <30ms
- C. <40ms
- D. <20ms
Answer: D
NEW QUESTION # 21
What is the maximum MIMO mode supported by Huawei 5G indoor CPE?
- A. 2T2R
- B. 4T4R
- C. 4T8R
- D. 2T4R
Answer: B
NEW QUESTION # 22
SSB GSCN is the center frequency number of an NR cell.
- A. True
- B. False
Answer: A
Explanation:
SSB GSCN is the center frequency number of an NR cell. SSB GSCN stands for "SS block group-specific cell number" and is used to identify the center frequency of an NR cell. This value is used in combination with the operating bandwidth of the cell to determine the physical layer resource grid for the cell. As such, it is important for the correct SSB GSCN to be configured for the cell in order to ensure the correct channel coding.
https://www.qualcomm.com/content/dam/qcomm-martech/dm-assets/documents/powerpoint_presentation_-_making_5g_nr_a_reality_february_2020_web.pdf Making 5G NR a Commercial Reality A unified, more capable 5G air ...
https://www.qualcomm.com/content/dam/qcomm-martech/dm-assets/documents/powerpoint_presentation_-_making_5g_nr_a_reality_february_2020_web.pdf
https://www.gtigroup.org/d/file/Resources/rep/2019-07-05/cbf7810256b4c312c460863fcb77bd58.pdf GTI 5G Device Power Consumption White Paper
https://www.gtigroup.org/d/file/Resources/rep/2019-07-05/cbf7810256b4c312c460863fcb77bd58.pdf In 5G NR, the SSB (Secondary Synchronization Signal Block) is used to provide the time and frequency synchronization information to the mobile devices. It is transmitted in the frequency domain and it consists of two parts: the SSB GSCN (Secondary Synchronization Signal Block - Group and Sequence Number) and the SSB MIB (Secondary Synchronization Signal Block - Master Information Block).
The SSB GSCN is a unique identifier that indicates the center frequency number of the cell. It is used to identify the cell and to determine the frequency offset of the cell with respect to the carrier frequency.
So, the statement is true, SSB GSCN is the center frequency number of an NR cell. It's worth noting that the SSB MIB contains other system information such as the system bandwidth, the transmission bandwidth configuration, and the number of symbols in a slot.
NEW QUESTION # 23
The RSRP value of the test terminal can be viewed on the GENEX Probe. Which of the following test results indicate good signal quality?
- A. -30 to -60dBm
- B. 0 to 60dBm
- C. 30 to 60dBm
- D. -60dBm to -90dBm
Answer: A
NEW QUESTION # 24
What is the maximum number of PCIs supported by a 5G network?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
Explanation
https://www.5gworldpro.com/blog/2020/11/11/what-is-difference-between-pci-in-4g-lte-and-pci-in-5g-nr/
NEW QUESTION # 25
Which of the following channels (signals) can be used for cell measurement in NR?
- A. SSB
- B. CSI-RS
- C. PT-RS
- D. DM-RS
Answer: B,D
Explanation:
1. DM-RS (Demodulation Reference Signals) are transmitted in the frequency domain, they are used to demodulate the downlink data and control channels, and they can be used for cell measurement such as cell identification, cell reselection, and handover. B. CSI-RS (Channel State Information Reference Signals) are also transmitted in the frequency domain, they are used to provide channel state information for downlink data and control channels, and they can be used for cell measurement such as link adaptation, beamforming and interference management.
DM-RS stands for Demodulation Reference Signal and is used for channel estimation in the frequency domain. CSI-RS stands for Channel State Information Reference Signal and is used for channel estimation in the time-frequency domain. PT-RS and SSB are not channels (signals) that can be used for cell measurement in NR.
NEW QUESTION # 26
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. The UE does not support EN-DC.
- B. The B1threshold is too high.
- C. The NSA switch is not turned on.
- D. Neighboring LTE cells and SCGs are not configured.
Answer: D
NEW QUESTION # 27
Which of the following can be used to check whether an antenna is reversely connected during NR single site verification?
- A. Transmission test
- B. Fixed-point CQT
- C. VSWR test
- D. DT around the site
Answer: A
NEW QUESTION # 28
Which of the following statements about the functions of an AAU are correct? (Choose All that Apply)
- A. Signal filtering
- B. Up/down conversion of spectrum
- C. Baseband data processing
- D. Power amplification
- E. Analog-to-digital/digital-to-analog conversion
Answer: A,B,D,E
Explanation:
An AAU is responsible for performing up/down conversion of spectrum, power amplification, signal filtering, and analog-to-digital/digital-to-analog conversion. It does not perform baseband data processing. This is stated in the official 3GPP documentation which states: "The AAU performs up/down conversion of spectrum, power amplification, signal filtering, and analog-to-digital/digital-to-analog conversion." Here is a link to the relevant 3GPP documentation for further reference: https://www.3gpp.org/dynareport/33222.htm
NEW QUESTION # 29
Which of the following signals is measured by a 5G UE to report channel quality information such as the CQI, RI, and PMI to a gNodeB?
- A. SSB RSRP
- B. CSI-RS SINR
- C. SSB SINR
- D. CSI-RS RSRP
Answer: B,D
NEW QUESTION # 30
According to 5G eMBB service requirements, which of the following is the minimum rate required for network edge coverage?
- A. 10Gbps
- B. 1Gbps
- C. 100Mbps
- D. 1Mbps
Answer: C
NEW QUESTION # 31
According to 3GPP specifications, which of the following is not an RRC state in 5G?
- A. RRC_CONNECTED
- B. RRC_IDLE
- C. RRC_INACTIVE
- D. RRC_ACTIVE
Answer: C
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 # 32
Which of the following MML commands can be used to query version information relating to the software stored on the gNodeB?
- A. LST SOFTWARE
- B. DSP SOFTWARE
- C. LST VER
- D. LST PATCH
Answer: A
NEW QUESTION # 33
Which of the following functions are implemented by the UBBP board in the BBU5900?
- A. Processes uplink and downlink baseband signals.
- B. Manages the configuration and devices for the base station.
- C. Monitors performance and processes signals for the base station.
- D. Provides CPRI ports for communication with RF modules.
Answer: A,D
NEW QUESTION # 34
C-band is the most popular frequency band for 5G network deployment. However, there is an imbalance between uplink and downlink coverage - how much does this imbalance approximately amount to?
- A. 12dB
- B. 3dB
- C. 20dB
- D. 5dB
Answer: C
NEW QUESTION # 35
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 B1 measurement configurations. Which of the following is not a possible cause for this?
- A. The B1 threshold is too high.
- B. Neighboring LTE cells and SCGs are not configured.
- C. The UE does not support EN-DC.
- D. The NSA switch is not turned on.
Answer: A
Explanation:
According to the official Huawei documentation, the possible causes for a 4G cell not delivering B1 measurement configurations during a 5G service test are that the UE does not support EN-DC, the NSA switch is not turned on, or neighboring LTE cells and SCGs are not configured.
NEW QUESTION # 36
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Huawei H35-480_V3.0 (HCIA-5G-RAN V3.0) Certification Exam is a rigorous exam that requires participants to have a strong understanding of 5G RAN technologies. H35-480_V3.0 exam is conducted in a proctored environment and consists of multiple-choice questions. Participants are required to score at least 60% to pass the exam and obtain the certification. HCIA-5G-RAN V3.0 certification is valid for three years and can be renewed by passing a recertification exam.
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