Free Huawei H35-480_V3.0 Practice Exam with Questions & Answers

A. The UBBP board in the BBU5900 provides CPRI (Common Public Radio Interface) ports for communication with RF (Radio Frequency) modules. CPRI is an interface standard that is used to transfer baseband signal data between the BBU and the RF modules. D. The UBBP board also processes uplink and downlink baseband signals. This includes signal demodulation, decoding, and modulation, as well as error correction, signal filtering, and other signal processing functions.

According to the Huawei SA Networking Product Design Guide (https://www.huawei.com/en/doc/e_huaweidoc/pdf/HW_051525), the downlink data split modes supported on the gNodeB side in the 5G NSA Option 3x architecture are A. MCGONLY: only split to the MCG and D. SCGANDMCG: dynamic data split. The MCGONLY mode is used when all the UE data must be sent to the same MCG, while the SCGANDMCG: dynamic data split mode is used when the data is split between multiple SCGs and MCGs.

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:

A. 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.

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.

NAS (Non-Access Stratum) procedure management in 5G involves three specific actions: registration management, session management, and RRC connection setup. Registration management involves sending and receiving of NAS messages related to the establishment of user-network connections, such as attach and detach procedures. Session management involves sending and receiving of NAS messages related to the management of user session related information, such as security context management. RRC connection setup involves sending and receiving of NAS messages related to the establishment, modification, and release of RRC connections. RRC reestablishment is not involved in NAS procedure management in 5G.

TS 138 331 - V15.2.1 - 5G; NR; Radio Resource Control (RRC ...

https://www.etsi.org/deliver/etsi_ts/138300_138399/138331/15.02.01_60/ts_138331v150201p.pdf

5g nr fr1 non-standalone ue rf conformance testing

https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_application/application_notes/1sl/1SL368_0e_5G_NR_UE_RF_conformance_38.521-3.pdf

TS 138 331 - V15.3.0 - 5G; NR; Radio Resource Control (RRC ...

https://www.etsi.org/deliver/etsi_ts/138300_138399/138331/15.03.00_60/ts_138331v150300p.pdf

According to 5G eMBB service requirements, the minimum rate required for network edge coverage is 100Mbps.

The non-standalone (NSA) mode of 5G NR refers to an option of 5G NR deployment that depends on the control plane of an existing 4G LTE network for control functions, while 5G NR is exclusively focused on the user plane.[7][8] This is reported to speed up 5G adoption, however some operators and vendors have criticized prioritizing the introduction of 5G NR NSA on the grounds that it could hinder the implementation of the standalone mode of the network

A. RSRP (Reference Signal Received Power) is the power level of the reference signals received from the cell, it is used to measure the strength of the signal from the cell, and it is an important parameter for cell selection and handover decisions. C. PCI (Physical Cell Identity) is a unique identifier assigned to each cell in the network, it is used to identify the cell and its system information.

The Sl-U interface is a signaling interface between the 5G CN and the 5G RAN in NSA networking. It uses the SCTP (Stream Control Transmission Protocol) to transport the signaling messages between the 5G CN and the 5G RAN.

The DSP SCTPLNK command can be used to check the status of the SCTP links between the 5G CN and the 5G RAN, it can show the SCTP link status, local and peer IP address, local and peer port number, association status, and more.

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.