H35-481_V2.0 HCIP-5G-RAN V2.0 Exam Questions and Answers

SCTP tracing result is not required to diagnose a low Internet access rate for a user. User performance testing can be used to collect information such as BLER (Block Error Rate) monitoring result, downlink RSRP (Reference Signal Received Power) monitoring result, and MCS (Modulation and Coding Scheme) count monitoring result. However, SCTP (Stream Control Transmission Protocol) tracing result is not required to diagnose a low Internet access rate. Reference: https://www.aricent.com/blog/user-performance-testing-for-5g/

5G Use Cases for Vertical China - 2021

https://www.gsma.com/greater-china/wp-content/uploads/2021/02/5G-Use-Cases-for-Vertical-China-2021-EN.pdf

Smart Manufacturing and Tactile Internet Based on 5G in Industry ...

https://www.mdpi.com/2079-9292/10/24/3175

Digital technologies for a new future

https://www.cepal.org/sites/default/files/publication/files/46817/S2000960_en.pdf

The BLK BRD command can be used to block the BBP, DUPEU and AAU boards. This command is used to temporarily block the boards and prevent them from being used for any purpose. The RRU board cannot be blocked by running this command.

According to Huawei ' s BTS5900 Product Brochure, PnP (Plug and Play) mode can be used for local data configuration if the configuration data of a new BTS5900 base station cannot be loaded remotely. In PnP mode, the BTS5900 automatically obtains the IP address and configuration data from the OMC or other device through DHCP. The BTS5900 also supports manual configuration of the IP address and configuration data.

In the data reconfiguration using the MAE-Deployment, the MOs gNodeBFuncrjon, gNBCULogicNode, and gNBDULogicNode are involved. These MOs are responsible for configuring the gNodeB functional parameters, the gNodeB CU logical nodes and the gNodeB DU logical nodes.

The functions of SRSs in NR include downlink beamforming weight calculation, obtaining the uplink channel quality, and uplink beam management. Uplink grants are not related to SRSs.

Extended Cyclic Prefix - an overview | ScienceDirect Topics

https://www.sciencedirect.com/topics/engineering/extended-cyclic-prefix

5G NR Numerology - Subcarrier Spcaing (SCS) - Techplayon

http://www.techplayon.com/5g-nr-numerology-subcarrier-spcaing-scs/

Concepts of Orthogonal Frequency Division Multiplexing (OFDM ...

https://rfmw.em.keysight.com/wireless/helpfiles/89600B/WebHelp/Subsystems/wlan-ofdm/content/ofdm_basicprinciplesoverview.htm

During a cell search, a UE uses synchronization signals to synchronize to a cell and obtain basic system information. The synchronization rasters that can be used by a UE during a cell search are:

A. 17.28MHz: This is the synchronization raster that is used for the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) in 5G NR.

B. 1200kHz: This is the synchronization raster that is used for the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) in 4G LTE.

C. 1.44MHz: This is the synchronization raster that is used for the cell-specific reference signal (CRS) in 4G LTE.

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.

the cell-specific reference signal (CRS) that is always sent in LTE cells is not used in NR to reduce interference under light loads and control channel overhead. Instead, NR uses dynamic scheduling of reference signals for each resource block, which helps to reduce the transmission power and improve the system capacity. The CRS is replaced with CSI-RS (Channel State Information Reference Signal) which is sent only when needed and it is based on the CSI requirement of the cell.

The official site for 3GPP specifications is https://www.3gpp.org/specifications . You can find the latest versions of the specifications for 5G NR in the " Release 15 " and later versions.

You can refer to the specification 38.211 (Physical channels and modulation) specifically section 7.4 " Cell-specific reference signal (CRS) " and section 7.5 " Channel state information-reference signal (CSI-RS) " .

Here is an excerpt from the specification 38.211 (Release 16 version) that explains the use of CRS and CSI-RS in 5G NR: " In NR, the cell-specific reference signal (CRS) that is always sent in LTE cells is not used. Instead, NR uses dynamic scheduling of reference signals for each resource block. This is done to improve system capacity and reduce transmission power. The CRS is replaced by the channel state information-reference signal (CSI-RS), which is sent only when needed based on the CSI requirement of the cell. "

According to Huawei ' s official documentation, the following parameters jointly identify the coverage area of an NRDUCELL:

NRDUCELId

NrDuCellTrpId

NRDUCELUd (Source: Huawei 5G Base Station NR-DU Configuration Guide)

According to Huawei official documentation, B. Batch reconfiguration of NEs is a scenario that can be performed using the radio data planning file in the MAE-Deployment. The radio data planning file can be used to perform batch reconfiguration of NEs, such as the configuration of multiple NEs in a batch. The radio data planning file can be used to import data, perform parameter configuration, and export the configuration results. The other options are not performed using the radio data planning file in the MAE-Deployment.

BWP (Bandwidth Part) is related to the time-frequency position of the PRACH used by the UE in the contention-based random access procedure. According to the official Huawei documentation, the BWP consists of one or more contiguous frequency sub-bands of the PRACH and defines the time-frequency position of the PRACH used by the UE. Reference: https://support.huawei.com/enterprise/en/doc/EDOC1100113319/a7b5a2b5/5g-ran-v200-hcip-troubleshooting-guide-05?sectionFlag=true

According to Huawei ' s 5G AAU Product Brochure, a 64T64R AAU typically has a maximum output power of 40W. This power is split between the 64 transmitters, so each transmitter has an output power of 0.625W. The output power of an AAU can be adjusted depending on the specific requirements. Sources: [1] Huawei. " 5G AAU Product Brochure. " Huawei, 2019. https://www.huawei.com/en/products/5g/aau-product. [2] Wang, X., Ge, X., and Zhang, J. " Analysis of base station power consumption in 5G ultra-dense networks. " IEEE Access, vol. 7, pp. 85812-85823, 2019. https://ieeexplore.ieee.org/document/8749683.

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.

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.

The statement A is incorrect. The larger the subcarrier spacing [1] , the shorter the symbol duration on each subcarrier, not the larger number of symbols. Statement B is also incorrect. The larger the subcarrier spacing [1] , the larger the CP length and the more suitable it becomes for wide coverage. Statement C is correct. The smaller the subcarrier spacing, the lower the power spectral density. Statement D is incorrect. The larger the subcarrier spacing [1] , the shorter the slot length.

1. A novel timing and frequency offset estimation algorithm for filtered ...

https://asp-eurasipjournals.springeropen.com/articles/10.1186/s13634-020-00696-1

Extended Cyclic Prefix - an overview | ScienceDirect Topics

https://www.sciencedirect.com/topics/engineering/extended-cyclic-prefix

5G NR Numerology - Subcarrier Spcaing (SCS) - Techplayon

http://www.techplayon.com/5g-nr-numerology-subcarrier-spcaing-scs/