H35-581_V2.0 Exam Dumps - Huawei HCIP-5G-RAN Questions and Answers

All four conditions can prevent a UE from generating or transmitting a valid B1 measurement report during Non-Standalone (NSA) E-UTRA–NR Dual Connectivity (EN-DC) access.

In NSA architecture, the LTE eNodeB acts as the Master Node and configures NR inter-RAT measurements to determine whether an eligible 5G NR cell can be added as a Secondary Node.

Event B1 is triggered when the measured quality of an inter-RAT neighboring cell exceeds the configured threshold, subject to hysteresis and time-to-trigger requirements.

Option A: Excessive received signal power may saturate the UE receiver, degrading synchronization-signal detection and preventing successful NR cell measurements.

Option B: If the LTE-side measurement configuration identifies a frequency that does not correspond to the intended NR SSB carrier, the UE may be unable to detect the target NR synchronization signals.

Option C: If the measured NR signal does not satisfy the configured B1 entry condition, the reporting event is not triggered.

Option D: An abnormal NR cell may fail to transmit the required synchronization signals correctly or provide measurable radio coverage, preventing a valid measurement result.

Therefore, all four conditions are plausible causes of missing B1 measurement reports.

Official Reference: 3GPP TS 36.331, Inter-RAT Measurement Reporting — Event B1 ; TS 38.533, Section 8.4.2, NR Inter-RAT Event-Triggered Reporting Requirements .

The statement is true because Notification Control is an optional Quality of Service (QoS) parameter applicable to Guaranteed Bit Rate (GBR) QoS flows in the 5G system architecture.

In 5G, QoS flows enable differentiated treatment of traffic according to service requirements such as guaranteed throughput, packet delay, reliability, and priority.

GBR QoS flows are characterized by Guaranteed Flow Bit Rate (GFBR) and Maximum Flow Bit Rate (MFBR) parameters.

Notification Control allows the NG-RAN to report when the guaranteed QoS requirements associated with a GBR QoS flow can no longer be satisfied.

According to 3GPP TS 23.501, the Session Management Function (SMF) enables Notification Control when the corresponding QoS Notification Control parameter is present in the Policy and Charging Control (PCC) rule received from the Policy Control Function (PCF).

The parameter is subsequently communicated to the NG-RAN as part of the QoS profile.

When Notification Control is active, the NG-RAN monitors whether the required GFBR, Packet Delay Budget (PDB), and Packet Error Rate (PER) conditions remain achievable.

If these requirements cannot be fulfilled, the NG-RAN sends the appropriate notification toward the SMF.

Notification Control is not mandatory for every GBR QoS flow and is not a standard parameter applied to ordinary non-GBR flows.

Therefore, option A is correct.

Official Reference: 3GPP TS 23.501, Section 5.7.2.4, Notification Control .

Options B, C, and D are the intended answers because their counter names explicitly identify abnormal Secondary gNodeB (SgNB) release events and distinguish the associated failure causes.

In Non-Standalone (NSA) E-UTRA–NR Dual Connectivity, the SgNB provides NR secondary connectivity while the LTE eNodeB maintains the master connection.

Abnormal SgNB releases can occur because of radio-link failures, UE communication failures, transmission-network faults, or unsuccessful signaling procedures.

Option B — N.NsaDc.SgNB.AbnormRel.Radio.UeLost identifies abnormal release events associated with loss of UE communication at the radio layer.

This counter is relevant when investigating coverage deterioration, radio-link instability, or unexpected UE disappearance from the secondary connection.

Option C — N.NsaDc.SgNB.AbnormRel.NoReply identifies abnormal releases associated with missing expected responses during applicable procedures.

Option D — N.NsaDc.SgNB.AbnormRel.Trans identifies abnormal releases attributable to transmission-layer problems, such as faults affecting transport connectivity or associated signaling paths.

Option A — N.NsaDc.SgNB.Rel.Coverage identifies coverage-related SgNB releases, but its name does not classify those events as abnormal releases.

The key distinction is between general release counters and counters explicitly classified under abnormal-release causes.

Therefore, B, C, and D are the intended selections.

Official Reference: 3GPP TS 37.340, E-UTRA and NR Multi-Connectivity , Secondary Node Release procedures; TS 28.552, 5G Performance Measurements .

Technical warning / qualification: The precise N.NsaDc counter names are Huawei-specific. Their interpretations are consistent with the updated question bank, but the official Huawei performance-counter dictionary has not been supplied or independently verified. The 3GPP references establish the procedure, not these exact counter definitions.

System Information Block 5 (SIB5) is the correct answer because it provides information required for inter-Radio Access Technology (inter-RAT) cell reselection from 5G NR to LTE E-UTRA.

When an NR UE operates in RRC_IDLE or RRC_INACTIVE, cell reselection allows it to identify and camp on a more appropriate serving cell according to broadcast network priorities and radio conditions.

The NR network broadcasts the relevant E-UTRA reselection configuration through SIB5.

According to 3GPP TS 38.331, SIB5 contains the carrierFreqListEUTRA information element, identifying LTE carrier frequencies that the UE may evaluate.

It also contains t-ReselectionEUTRA , which determines the applicable inter-RAT reselection timing requirement.

Additional information can include frequency priorities, reselection thresholds, minimum received signal-level requirements, and neighboring-cell restrictions.

These parameters allow the UE to compare candidate LTE cells against the NR serving cell and apply the configured reselection criteria.

The remaining options serve different functions.

SIB3 provides NR intra-frequency cell-reselection information.

SIB4 provides NR inter-frequency cell-reselection information.

SIB6 is not the system information block used to advertise the NR-to-E-UTRA reselection frequency configuration.

Therefore, SIB5 is specifically responsible for supplying the LTE frequencies and associated reselection parameters configured by the NR network.

Official Reference: 3GPP TS 38.331, Section 6.3.1, SIB5 Information Element ; TS 38.304, UE Procedures in Idle Mode and RRC_INACTIVE .

The intended answers are Case D, Case C, and Case A, corresponding to the SSB transmission patterns identified as supported by the Huawei NR TDD implementation described in the updated question bank.

In 5G NR, Synchronization Signal/PBCH Block (SSB) patterns define the candidate time-domain positions of synchronization blocks within an SSB burst set.

The patterns depend on the SSB subcarrier spacing, operating frequency range, and applicable radio-access configuration.

Case A uses 15 kHz subcarrier spacing and is defined for applicable FR1 operating bands.

Case C uses 30 kHz subcarrier spacing and supports configurations used in applicable low-frequency NR deployments, including TDD bands.

Case D uses 120 kHz subcarrier spacing and is associated with higher-frequency NR operation.

The source material identifies Cases A and C as supported for Huawei low-frequency TDD deployments and Case D for supported high-frequency TDD deployments.

Case B also uses 30 kHz subcarrier spacing and is a valid standardized SSB pattern. Its exclusion here reflects the intended Huawei product-support subset rather than a prohibition imposed by the NR specification.

Therefore, options B, C, and D are the intended answers.

Official Reference: 3GPP TS 38.213, Section 4.1, Cell Search and Candidate SS/PBCH Block Positions ; TS 38.101-1 and TS 38.101-2, applicable band and SSB numerology requirements.

Technical warning / qualification: This is a Huawei software-version-specific question. The standards confirm that Cases A, B, C, and D exist, but do not independently establish the supported subset for every Huawei TDD base-station release. The official Huawei 5G RAN Channel Management Feature Parameter Description for the relevant release is required for final vendor verification.

Option A is incorrect because conventional NR PDSCH resource-allocation type 1 assigns a contiguous set of Resource Blocks (RBs), rather than supporting both contiguous and discontinuous frequency-domain allocation.

In 5G NR, the gNodeB allocates PDSCH frequency-domain resources through Downlink Control Information (DCI), using the applicable resource-allocation type configured for the active Bandwidth Part (BWP).

Resource-allocation type 0 uses a bitmap to indicate the Resource Block Groups (RBGs) allocated to a UE.

Each RBG consists of one or more consecutive RBs, with its nominal size determined by the BWP size and configured RBG-size parameter.

Because the bitmap can identify separate RBGs, type 0 can represent contiguous or noncontiguous groups of allocated resources.

Resource-allocation type 1 uses a Resource Indication Value (RIV) to identify the starting RB and the number of consecutively allocated RBs.

This provides RB-level allocation granularity but does not permit arbitrary discontinuous allocation within the conventional type 1 representation.

Therefore, option B correctly identifies type 1 as RB-level allocation, while options C and D correctly describe the characteristics of type 0.

Only option A incorrectly attributes discontinuous allocation capability to conventional type 1.

Official Reference: 3GPP TS 38.214, Sections 5.1.2.2.1 and 5.1.2.2.2, Downlink Resource Allocation Types 0 and 1 .

Options A, B, and C describe the principal eligibility and configuration requirements for initiating NR inter-RAT measurements in an E-UTRA–NR Dual Connectivity (EN-DC) deployment.

In NSA architecture, the LTE eNodeB operates as the Master Node and controls the initial measurement and secondary-node addition procedures.

Option A: The core network must permit the UE to use the applicable dual-connectivity service. Subscription restrictions and network indications can prevent the eNodeB from enabling NR secondary connectivity.

Option B: The UE must report capabilities compatible with EN-DC operation. The relevant capability framework was introduced in 3GPP Release 15, although the precise supported band combinations and EN-DC capability fields determine actual eligibility.

Option C: The LTE network must have the necessary dual-connectivity functionality enabled, together with appropriate neighboring NR frequency and measurement configurations. Incorrect frequency information can prevent the UE from measuring the intended NR cells.

Option D: The UMPTa is a Huawei hardware-board designation. The standardized B1 measurement configuration procedure does not require this specific board model. Hardware compatibility depends on the actual Huawei product and software release.

Therefore, A, B, and C represent the intended operational conditions, while D incorrectly introduces a specific hardware model as a universal requirement.

Official Reference: 3GPP TS 37.340, E-UTRA and NR Multi-Connectivity , EN-DC Architecture and Secondary Node Addition; TS 36.331, Inter-RAT Measurement Configuration .

Technical warning / qualification: The precise Huawei NSA feature-switch and board-compatibility conditions require the relevant equipment-version documentation; 3GPP establishes the general signaling requirements.

Options B and C are correct because the standardized Timing Advance (TA) offset values applicable to an NR Frequency Range 1 (FR1) Time Division Duplex (TDD) deployment include 25600 T_c and 39936 T_c, depending on the coexistence scenario.

NR band n41 operates in FR1 using TDD.

Timing Advance enables the UE to adjust uplink transmission timing so that signals from different UEs arrive at the gNodeB within the required timing alignment.

In NR, the effective uplink timing relationship includes a timing-advance offset represented by N_TA,offset.

According to the standardized timing requirements:

Option B — 25600 T_c: This value applies to FR1 TDD operation without the relevant LTE–NR coexistence requirements. It is also the default FR1 offset in applicable configurations when no explicit n-TimingAdvanceOffset is provided.

Option C — 39936 T_c: This value applies to FR1 TDD operation involving LTE–NR coexistence.

Option A — 0 T_c: This value is associated with the specified FR1 FDD coexistence case, not the normal n41 TDD configurations represented by this question.

Option D — 51200 T_c: This is not one of the applicable standardized NR timing-advance offset values.

Therefore, B and C are correct.

Official Reference: 3GPP TS 38.533, Section 4.4.1.0.1, Table 4.4.1.0.1-2, Timing Advance Offset Values ; TS 38.213, Section 4.2, Transmission Timing Adjustments .

Options A, B, and D represent the intended downlink scheduling principles described in the updated question bank.

Downlink scheduling is controlled by the gNodeB, which assigns radio resources and selects transmission parameters according to channel conditions, traffic demand, interference, and retransmission requirements.

Option A: Interference randomization can be used as an interference-management technique in heavily loaded radio networks. Its purpose is to reduce persistent interference effects by varying the relevant transmission or resource-allocation characteristics. However, enabling a particular Huawei interference-randomization feature at high PRB utilization is an implementation-specific recommendation.

Option B: The gNodeB uses HARQ acknowledgment information reported by the UE to determine whether transmitted downlink data has been successfully decoded or whether retransmission may be required.

Option D: Channel Quality Indicator (CQI) feedback provides information about the radio channel and supports Modulation and Coding Scheme (MCS) selection. Higher-quality conditions generally permit higher-order modulation and more efficient coding.

Option C is incorrect because downlink scheduling does not universally require an explicit scheduling request initiated by the UE.

The gNodeB already manages downlink data queues and can schedule available downlink traffic according to the configured scheduling mechanism.

Therefore, A, B, and D are the intended selections.

Official Reference: 3GPP TS 38.214, Sections 5.1 and 5.2, PDSCH Procedures and CSI Reporting ; TS 38.321, Section 5.3.2, Downlink HARQ Operation .

Technical warning / qualification: Options B and D are supported by standardized mechanisms. Option A is a vendor-specific optimization recommendation and requires confirmation against the Huawei scheduling feature documentation for the relevant release.