5G RAN
Cell Management Feature Parameter
Description
Issue
Draft A
Date
2018-12-30
HUAWEI TECHNOLOGIES CO., LTD.
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Copyright © Huawei Technologies Co., Ltd. 2019. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks
trademarks and trade names mentioned
mentioned in this
this document are
are the property of
of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer.
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or
representations
representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial
Industrial Base
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People's Republic of China
Website:
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5G RAN
Cell Management Feature Parameter Description
Contents
Contents
1 Change History..............
History.....................................
.............................................
............................................
............................................
............................................
........................ 1
1.1 5G RAN2.1
RAN2 .1 Draft A (2018-12-30)..................................................................................................
(2018-12-30).................................................................................................................................
............................... 1
2 General Statements............
Statements..................................
............................................
.............................................
.............................................
........................................
.................. 3
3 Cell Management..........
Management................................
............................................
.............................................
.............................................
............................................
........................5
..5
3.1 Principles........................................................................................
Principles ........................................................................................................................................................................
................................................................................ 5
3.1.1 Definition.....................................................................................................................................................................5
Definition.....................................................................................................................................................................5
3.1.2 Related Concepts.........................................................................
Concepts.........................................................................................................................................................
................................................................................ 5
3.1.2.1 Cell............................................................................................................................................................................6
Cell.... ........................................................................................................................................................................6
3.1.2.2 Sector...........................................................................................
........................................................................................................................................................................
............................................................................. 7
3.1.2.3 Sector Equipment.................................................................................
Equipment.....................................................................................................................................................
.................................................................... 7
3.1.2.4 RF Equipment...........................................................................................................................................................7
Eq uipment...........................................................................................................................................................7
3.1.2.5 Baseband
Baseband Equipment....................................................................................................................................
Equipment................................................................................................................................................
............ 7
3.1.2.6 NR DU
D U Cell TRP......................................................................................................................................................7
3.1.2.7 NR DU
D U Cell Coverage Area.....................................................................................................................................
Area..................................................................................................................................... 7
3.1.3 Typical Scenarios.........................................................................................................................................................7
3.1.3.1 Common
Comm on Cell.....................................................................................
Cell............................................................................................................................................................8
.......................................................................8
3.1.3.2 Combined-RRU
Combi ned-RRU Cell...............................................................................
Cell................................................................................................................................................
................................................................. 8
3.1.3.3 Cells in
i n Multi-Carrier Sectors..............................................................................................
Sectors...................................................................................................................................8
.....................................8
3.1.3.4 Uplink and Downlink
Downlink Decoupling Cells.................................................................................................
Cells..................................................................................................................
................. 9
3.1.3.5 RF Combination
Co mbination Cell................................................................................................................................................
Cell................................................................................................................................................9
9
3.1.4 Cell-related
Cell-rela ted Parameters......................................................................................
Parameters..............................................................................................................................................10
........................................................10
3.1.4.1 Frequency
Freque ncy Band......................................................................................................................................................
Band...................................................................................................................................................... 10
3.1.4.2 NARFCN........................................................................................
NARF CN................................................................................................................................................................
........................................................................ 10
3.1.4.3 SSB Frequency-Domain
F requency-Domain Position...........................................................................................................................12
3.1.4.4 Cell Bandwidth.......................................................................................................................................................
Bandwidth....................................................................................................................................................... 13
3.1.4.5 Subcarrier
Subcarrier Spacing..........................................................................
Spacing..................................................................................................................................................13
........................................................................13
3.1.4.6 Uplink-Downlink Slot Configuration.....................................................................................................................13
3.1.4.7 Transmit/Receive
Transmit/Receive Mode...........................................................................................
Mode..........................................................................................................................................13
...............................................13
3.1.4.8 Maximum Transmit Power.....................................................................................................................................
Power..................................................................................................................................... 13
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5G RAN
Cell Management Feature Parameter Description
Contents
3.3 Requirements................................................................................................................................................................
Requirements................................................................................................................................................................ 14
3.3.1 Licenses........................................................................................................................
Licenses.....................................................................................................................................................................
............................................. 14
3.3.2 Software.....................................................................................................................................................................
Software.....................................................................................................................................................................14
14
3.3.3 Hardware...............................................................................
Hardware...................................................................................................................................................................
.................................................................................... 15
3.4 Operation and Maintenance..........................................................................................................................................
Maintenance..........................................................................................................................................16
16
3.4.1 Data Configuration.......................................................................................................................
Configuration....................................................................................................................................................
............................. 17
3.4.1.1 Data Preparation.......................................................................................................................
Preparation.....................................................................................................................................................
.............................. 17
3.4.1.2 Using MML Commands.........................................................................................................................................23
3.4.1.3 Using the CME.......................................................................................................................................................
CME....................................................................................................................................................... 29
3.4.2 Activation Observation..............................................................................................................................................29
4 Glossary.........
Glossary................................
.............................................
............................................
............................................
............................................
.......................................30
.................30
5 Reference Documents.........
Documents...............................
............................................
............................................
............................................
......................................
................ 31
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5G RAN
Cell Management Feature Parameter Description
1 Change History
1
Change History
This section describes
describes changes not included in the "Parameters", "Counters", "Glossary", and
"Reference Documents" chapters. These ch anges include:
include:
l
Technical changes
Changes in functions and their corresponding parameters
l
Editorial changes
changes
Improvements
Improvements or revisions to the documentation
documentation
1.1 5G RAN2.1 Draft A (2018-12-30)
This issue introduces the following changes to 5G RAN2.0 01 (2018-10-10).
Technical Changes
Change Description
Parameter Change
Base Station
Model
Changed the name of the MO NRCell
containing the TrackingAreaId parameter to
NRDUCELL. For details, see:
NRDUCell.Tracking
AreaId
5900 series base
stations
Added the following
parameters:
5900 series base
stations
l
3.4.1.1 Data Preparation
l
3.4.1.2 Using MML
MML Commands
Commands
Added the configurations for the frequencydomain position of the synchronization signal
block (SSB). For details, see 3.1.4.3 SSB
Frequency-Domain
Frequen
cy-Domain Position.
Added feature support for LampSite base
stations. For details, see:
l
NRDUCell.SsbDe
scMethod
l
NRDUCell.SsbFr
eqPos
NA
DBS5900
LampSite base
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5G RAN
Cell Management Feature Parameter Description
1 Change History
Editorial Changes
Optimized descriptions for configuring the SSB center frequency.
frequency. For details, see 3.1.4.2
NARFCN.
Added support for the typical scenario of combined-RRU/RFU-sector cells. For details, see
3.1.3.2 Combined-RRU Cell.
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5G RAN
Cell Management Feature Parameter Description
2 General Statements
2
General Statements
Purpose
Feature Parameter Description documents are intended to acquaint readers with:
l
The technical principles of features and their related parameters
l
The scenarios where these features are used, the benefits they provide, and the impact
they have on networks and functions
l
Requirements of the operating environment that must be met before feature activation
l
Parameter configuration required for feature activation, verification of feature activation,
and monitoring of feature performance
NOTE
This document only provides guidance for feature activation. Feature deployment and feature
gains depend on the specifics of the network scenario where the feature is deployed. To achieve
the desired gains, contact Huawei professional service engineers.
Software Interfaces
Any parameters, alarms, counters, or managed objects (MOs) described in Feature Parameter
Description documents apply only to the corresponding software release. For future software
releases, refer to the corresponding updated product documentation.
Trial Features
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5G RAN
Cell Management Feature Parameter Description
2 General Statements
the current version. Huawei reserves the rights to convert trial features into commercial
features in later R/C versions. If trial features are converted into commercial features in a later
version, customers shall pay a licensing fee to obtain the relevant licenses prior to using the
said commercial features. If a customer fails to purchase such a license, the trial feature(s)
will be invalidated automatically when the product is upgraded.
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3
Cell Management
3.1 Principles
3.1.1 Definition
Cell management refers to management of communications resources by establishing cells
and configuring related parameters.
3.1.2 Related Concepts
Figure 3-1 illustrates the components involved in cell management.
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5G RAN
Cell Management Feature Parameter Description
Figure 3-1 Components involved in cell management
3 Cell Management
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3.1.2.2 Sector
A sector is an area covered by antennas. A sector is added by running the ADD SECTOR
command. Each sector uses one or more radio carriers to provide coverage. A sector can be
omnidirectional or directional, depending on the antenna type.
l
Omnidirectional
An omnidirectional sector uses omnidirectional antennas to provide 360° coverage with
the antenna at the center.
center. In light-traffic areas, the deployment of omnidirectional sectors
means fewer antennas need to be deployed, which reduces equipment cost.
l
Directional
A directional sector uses directional antennas to provide coverage. Each directional
antenna covers a 60° or 120° sector area, depending on whether there are six or three
sectors configured on the gNodeB. The azimuth of each sector is slightly over 60 or 120
degrees in actual scenarios so that the sectors can overlap to ensure seamless coverage.
In heavy-traffic areas, the deployment of directional sectors supports more traffic
volume. Directional sectors allow for greater flexibility in area and sector planning.
3.1.2.3 Sector Equipment
Sector equipment is a set of antennas that are used to provide coverage for the same sector. A
sector is linked to a set of antennas comprising a specific piece of sector equipment by
running the ADD SECTOR and ADD SECTOREQM commands.
3.1.2.4 RF Equipment
RF equipment is a set of RF processing units, such as remote radio units (RRUs) or active
antenna units (AAUs). RF equipment is added and associated with CPRI ports on baseband
processing units (BBPs) by running
running the ADD RRUCHAIN and ADD RRU commands.
3.1.2.5 Baseband Equipment
A set of baseband equipment consists of one or more BBPs. A BBP is added by running the
ADD BRD command. It can be added to a piece of baseband equipment by running the ADD
BASEBANDEQM command.
The baseband equipment for NR must support both uplink and downlink transmissions.
3.1.2.6 NR DU Cell TRP
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3.1.3.1 Common Cell
A common cell is a cell that is established in a sector served by an RF module. The cell
shown in Figure 3-2 is a common cell.
Figure 3-2 Common cell
3.1.3.2 Combined-RRU Cell
A combined-RRU cell is served by two RRUs connected to the same antenna to cover the
same area. This networking applies only to NR SUL (supplementary uplink) cells. SUL cells
supports combination of 1T2R or 2T2R RRUs.
Figure 3-3 Combined-RRU-sector cell (using 2T2R RRUs as an example)
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
Multi-carrier sectors are used in densely populated areas where traffic increases rapidly,
rapidly, such
as exhibition centers, airport waiting areas, shopping malls, central business districts, and
high-end residential areas.
For details about carrier specifications, see RRU technical descriptions in 3900 & 5900 Series
Base Station Product
Product Documentation.
Documentation.
3.1.3.4 Uplink and Downlink Decoupling Cells
Uplink and downlink decoupling cells are cells that use high bands (such as 3.5 GHz) for
downlink and low bands (such as 1.8 GHz/700 MHz) for uplink to improve uplink coverage.
Figure 3-5 illustrates an uplink and downlink decoupling cell.
Figure 3-5 Uplink and downlink decoupling cell
3.1.3.5 RF Combination Cell
In a LampSite scenario, RF signals from multiple pRRUs are combined in the RHUB to form
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3.1.4 Cell-related Parameters
This chapter describes the following cell-related parameters: frequency
frequency band, NR absolute
radio frequency channel number (NARFCN), SSB frequency-domain position, cell
bandwidth, subcarrier spacing, uplink-downlink slot configuration,
configuration, transmit/receive
transmit/receive mode,
and maximum transmit power.
For details about other parameters of a cell, see the corresponding feature documentation. For
example, for details about CPRI compression, see CPRI Compression.
Compression.
This version supports only TDD cells and SUL cells.
3.1.4.1 Frequency Band
The frequency band of a cell is specified by the NRCell.FrequencyBand and NRDUCell
parameters. The two
two parameters must be set to the same value. Table 3-1 lists the frequency
bands supported by NR cells.
cells. For details, see section
section 5.2 "Operating bands
bands for NR" in 3GPP
TS 38.104 V15.2.0.
Table 3-1 Frequency bands supported by NR cells
Frequency
Band
Uplink Frequency Range
(Lowest and Highest
Frequencies)
Downlink Frequency Range
(Lowest and Highest
Frequencies)
Duplex
Mode
n77
3300 MHz
4200 MHz
3300 MHz
4200 MHz
TDD
n78
3300 MHz
3800 MHz
3300 MHz
3800 MHz
TDD
n79
4400 MHz
5000 MHz
4400 MHz
5000 MHz
TDD
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5G RAN
Cell Management Feature Parameter Description
l
3 Cell Management
If NRDUCell.UlNarfcnConfigInd is set to NOT_CONFIG, calculate the uplink
NARFCN and downlink NARFCN
NARFCN based on the start
start and end frequencies
frequencies of the cell.
The calculation procedure is as follows:
a.
Determine
Determine the downli
downlink
nk center
center frequenc
frequency
y of a cell
cell based
based on
on the downlink
downlink start
start
frequency and downlink bandwidth of the cell.
Cell's downlink center frequency (DLCELL REF) = Cell downlink start frequency
(MHz) + Cell downlink bandwidth (MHz)/2
b.
Determine the uplink center
center frequency of
of a cell based on the uplink start frequency
and uplink bandwidth of the cell.
Cell's uplink center frequency (ULCELLREF) = Cell uplink start frequency (MHz) +
Cell uplink bandwidth (MHz)/2
c.
Calculate
Calculate the downli
downlink
nk and
and uplink
uplink center
center NARFCNs
NARFCNs of
of the cell based
based on the cell
cell
downlink center frequency (DLCELL REF) and the cell uplink center frequency
(ULCELLREF), respectively.
Cell's downlink center NARFCN (NREF-DLCELL) = Int{(DLCELLREF - FREF-Offs )/
ΔFGlobal + NREF-Offs }
Cell's uplink center NARFCN (NREF-ULCELL) = Int{(ULCELLREF - FREF-Offs )/
ΔFGlobal + NREF-Offs }
Table 3-2 Requirements for available NARFCNs
Frequency Band
Subcarrier Spacing
Available NARFCN
n41
30 kHz
The NARFCN must be an
integral multiple of 6.
n77
30 kHz
The NARFCN must be an
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
Table 3-3 Parameters related to N REF-CELL
Frequency
Range (MHz)
ΔFGlobal (M
(MHz)
FREF-Offs (M
(MHz)
NREF-Offs
0–3000
0.005
0
0
3000–24250
0.015
3000
600000
24250–100000
0.06
24250.08
2016667
3.1.4.3 SSB Frequency-Domain Position
In an NR system, an SSB comprises a primary synchronization signal (PSS), secondary
synchronization signal (SSS), and PBCH. Each SSB provides 240 consecutive subcarriers. A
UE searches for cells based on received PSS and SSS signals and obtains necessary
information from the received broadcast system messages. Then, the UE selects the most
appropriate cell to camp on using the received information.
The SSB frequency-domain position indicates the SSB center frequency position of a cell. It
is specified by the NRDUCell .SsbDescMethod and NRDUCell.SsbFreqPos parameters. The
SSB frequency-domain position is not configured for SUL cells, but must be configured for
TDD cells.
When the SSB frequency-domain position is configured, NRDUCell.SsbDescMethod
SsbDescMethod is only
set to SSB_DESC_TYPE_NARFCN . NRDUCell.SsbFreqPos specifies the NARFCN
corresponding to the SSB center frequency. Table 3-4
3 -4 lists the NRDUCell.SsbFreqPos
settings.
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3.1.4.4 Cell Bandwidth
The uplink and downlink bandwidths of a cell are respectively specified by the
NRDUCell.UlBandwidth
NRDUCell.UlBandwidth and NRDUCell.DlBandwidth parameters. The uplink and
downlink bandwidths of a cell must be the same.
Table 3-5
3 -5 lists the bandwidth supported by an NR cell.
Table 3-5
3 -5 Bandwidth supported by an NR cell
Duplex Mode
Supported Cell Bandwidth
TDD
40 MHz, 60 MHz, 80 MHz, 100 MHz
SUL
15 MHz, 20 MHz
3.1.4.5 Subcarrier Spacing
SubcarrierSpacing parameter.
The subcarrier spacing of a cell is specified by the NRDUCell.SubcarrierSpacing
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
transmit antennas (NTx). NTx is configured by the NRDUCellTRP.TxRxMode parameter. The
total transmit power of a cell is calculated as follows: PCell = Pmax_out + 10 x log10(NTx).
If multiple cells are served by the same R RU or AAU, the sum of Pmax_out of these cells must
be less than or equal to the
the maximum transmit power of
of the RRU's or AAU's transmit
channel. Otherwise, ALM-29870 NR DU Cell TRP Unavailable is generated.
NOTE
l
For details about the maximum transmit power of RRUs or AAUs when different quantities of
carriers are configured, see the following section in 3900 & 5900 Series Base Station Product
Documentation
Documentation:: 3900 & 5900 Series Base Station Technical Description > Typical Power
Configuration Reference for RF Modules.
l
SUL cells involve only uplink transmission and therefore require no transmit power configurations.
3.2 Network Analysis
3.2.1 Benefits
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3.3.3 Hardware
Base Station Models
l
5900 series base stations
l
DBS5900 LampSite base stations
Boards
Only the UBBPfw1 and UMPTe boards support this function. For details about the RATs
supported by boards, see BBU5900 Hardware
Hardware Description
Description in 3900 & 5900 Series Base
Station Product Documentation.
Documentation.
RF Modules
All NR-capable AAUs/RRUs/pRRUs support this function.
l
For details about NR-capable AAUs, see AAU Technical
Technical Specifications.
Specifications.
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
l
If TDD cells under a base station have different uplink-downlink slot configurations,
they must be bound to different BBPs. The uplink-downlink slot configurations of all
TDD cells on the same BBP must be the same.
l
If TDD cells under a base station have different subcarrier spacing, they must be bound
to different BBPs. The subframe spacing of all TDD cells on the same BBP must be the
same.
l
If TDD cells under a base station have different bandwidths, they must be bound to
different BBPs. The bandwidths of all TDD cells on the same BBP must be the same.
l
If both eCPRI 64T64R TDD cells and CPRI 64T64R TDD cells are served by the same
base station, they must be bound
bound to different BBPs.
BBPs. The RF module models of all TDD
cells on the same BBP must be the same.
l
If TDD cells under a base station have different transmit/receive modes, they must be
bound to different
different BBPs. The transmit/receive
transmit/receive modes of all TDD cells
cells on the same BBP
must be the same.
The following requirements for configuring high-frequency cell must apply:
Cells must be established on the BBP directly connected the RRU/AAU over the CPRI/eCPRI
optic fiber, and such cells must also be bound to this BBP, if required.
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
3.4.1 Data Configuration
3.4.1.1 Data Preparation
The following table describes the parameters that must be set in a SECTOR MO to configure
a sector.
Parameter Name
Parameter ID
Setting Notes
Sector ID
SECTOR.SECTORID
SECTORID
Set this parameter to a unique value.
Sector Name
SECTOR.SECNAME
N/A
Location Name
SECTOR.LOCATIONN
LOCATIONN
AME
N/A
User Label
SECTOR.USERLABEL
N/A
Antenna Azimuth
SECTOR.ANTAZIMUT
ANTAZIMUT
N/A
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
Parameter Name
Parameter ID
Setting Notes
Beam Azimuth
Offset
SECTOREQM.BEAMA
ZIMUTHOFFSET
ZIMUTHOFFSET
Set this parameter to None if the
SECTOREQM.ANTCFGMODE
ANTCFGMODE
parameter is set to BEAM.
Antenna Number
SECTOREQM.ANTNU
M
-
Cabinet No. of
SECTOREQM.ANT1CN
This parameter is mandatory when
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
Parameter Name
Parameter ID
Setting Notes
Tracking Area ID
gNBTrackingArea.Track
ingAreaId
The setting of this parameter takes
effect only for the gNodeB. The
tracking area identity (TAI) specified
by this parameter is different
different from the
TAI configured in the tracking area list
(TAL) in the core network.
Tracking Area Code
gNBTrackingArea Tac
N/A
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
Parameter Name
Parameter ID
Setting Notes
Cell Radius
NRDUCell.CellRadius
The value of this parameter must be
greater than or equal to the actual cell
radius. Otherwise, UEs at the cell edge
may fail to access the network.
Slot Assignment
NRDUCell.SlotAssignm
ent
This parameter needs to be set only for
TDD cells.
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
set to 20 MHz, 50 MHz, 70 MHz, 80 MHz, 90 MHz, or 100 MHz,
NRDUCell.SsbFreqPos must be set to the value of NRDUCell.DlNarfcn minus 36.
l
If NRDUCell.FrequencyBand is set to n77, n78, or n79, and NRDUCell.DlBandwidth
is set to 20 MHz, 50 MHz, 70 MHz, 80 MHz, 90 MHz, or 100 MHz,
NRDUCell.SsbFreqPos must be set to the value of NRDUCell.DlNarfcn minus 12.
l
If NRDUCell.FrequencyBand is set to n3 or n28 and NRDUCell.DlBandwidth is not
set to 15 MHz, NRDUCell.SsbFreqPos must be set to the value of
NRDUCell.DlNarfcn.
If NRDUCell FrequencyBand is set to n41 and NRDUCell DlBandwidth is not set to
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5G RAN
Cell Management Feature Parameter Description
3 Cell Management
Parameter Name
Parameter ID
Setting Notes
NR DU Cell
Coverage ID
NRDUCellCoverage.Nr
DuCellCoverageId
DuCellCoverageId
N/A
Sector Equipment ID
NRDUCellCoverage.Sec
torEqmId
N/A
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Cell Management Feature Parameter Description
3 Cell Management
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Cell Management Feature Parameter Description
3 Cell Management
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Cell Management Feature Parameter Description
3 Cell Management
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Cell Management Feature Parameter Description
3 Cell Management
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Cell Management Feature Parameter Description
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