Extended Cell Range(ERAN7.0_01)

eRAN

Extended Cell Range FeatureParameter Description

Issue 01Date 2014-04-26

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2014. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.comEmail: [email protected]

Issue 01 (2014-04-26) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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Contents

1 About This Document..................................................................................................................11.1 Scope..............................................................................................................................................................................11.2 Intended Audience..........................................................................................................................................................11.3 Change History...............................................................................................................................................................21.4 Differences Between eNodeB Types..............................................................................................................................22 Overview.........................................................................................................................................32.1 Introduction....................................................................................................................................................................42.2 Benefits...........................................................................................................................................................................43 Random Access Preamble Format..............................................................................................54 Related Features.............................................................................................................................64.1 Features Related to LBFD-002012 Cell Access Radius up to 15km.............................................................................64.2 Features Related to LOFD-001009 Extended Cell Access Radius................................................................................65 Network Impact.............................................................................................................................85.1 LBFD-002012 Cell Access Radius up to 15km.............................................................................................................85.2 LOFD-001009 Extended Cell Access Radius................................................................................................................86 Engineering Guidelines...............................................................................................................96.1 When to Use Extended Cell Range................................................................................................................................96.2 Required Information.....................................................................................................................................................96.3 Planning..........................................................................................................................................................................96.3.1 RF Planning.................................................................................................................................................................96.3.2 Network Planning......................................................................................................................................................106.3.3 Hardware Planning....................................................................................................................................................136.4 Deployment..................................................................................................................................................................136.4.1 Requirements.............................................................................................................................................................136.4.2 Data Preparation........................................................................................................................................................146.4.3 Precautions.................................................................................................................................................................176.4.4 Initial Configuration..................................................................................................................................................176.4.5 Activation Observation..............................................................................................................................................206.4.6 Reconfiguration.........................................................................................................................................................226.4.7 Deactivation...............................................................................................................................................................22

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6.5 Performance Monitoring...............................................................................................................................................236.6 Parameter Optimization................................................................................................................................................236.7 Troubleshooting............................................................................................................................................................237 Parameters.....................................................................................................................................248 Counters........................................................................................................................................259 Glossary.........................................................................................................................................2610 Reference Documents...............................................................................................................27

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1 About This Document1.1 Scope

This document describes the extended cell range feature, including its technical principles,related features, network impact, and engineering guidelines. This document covers thefollowing features:l LBFD-002012 Cell Access Radius up to 15kml LOFD-001009 Extended Cell Access RadiusThis document applies to the following types of eNodeBs.

eNodeB Type ModelMacro 3900 series eNodeB

Any managed objects (MOs), parameters, alarms, or counters described herein correspond tothe software release delivered with this document. Any future updates will be described in theproduct documentation delivered with future software releases.This document applies only to LTE FDD. Any "LTE" in this document refers to LTE FDD, and"eNodeB" refers to LTE FDD eNodeB.

1.2 Intended AudienceThis document is intended for personnel who:l Need to understand the features described hereinl Work with Huawei products

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1.3 Change HistoryThis section provides information about the changes in different document versions. There aretwo types of changes:l Feature change

Changes in features and parameters of a specified version as well as the affected entitiesl Editorial change

Changes in wording or addition of information and any related parameters affected byeditorial changes. Editorial change does not specify the affected entities.

eRAN7.0 01 (2014-04-26)This issue does not include any changes.

eRAN7.0 Draft B (2014-03-07)This issue includes the following changes.

ChangeType

Change Description Parameter Change

Affected Entity

Featurechange

None None N/A

Editorialchange

Added 1.4 Differences Between eNodeBTypes, which describes differences infeature support between eNodeB types.

None N/A

eRAN7.0 Draft A (2014-01-20)Compared with Issue 02 (2013-05-31) of eRAN6.0, Draft A (2014-01-20) of eRAN7.0 includesthe following changes.

Change Type Change Description Parameter ChangeFeature change Changed the name of Huawei mobile

element management system fromM2000 to U2000.

None

Editorial change None None

1.4 Differences Between eNodeB TypesThe features described in this document apply only to macro eNodeBs.

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2 OverviewMobile communications networks now cover most inland areas in the world. Rural areas andremote areas such as the sea, deserts, and grasslands, however, have a poor coverage becausesite acquisition is difficult. It is difficult to construct sites on the sea, and deploying sites ingrasslands or deserts (traffic is light) will increase operators' investment but cannot provide newrevenue growth potential with operators.Additionally, extended coverage in these areas will increase access delay and requires enhancedcoverage. In this situation, Huawei eNodeBs use the extended cell range feature.

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2.1 IntroductionExtended cell range helps operators to expand cell coverage to up to 100 km.The features involved in extended cell range and their application scenarios are as follows:l LBFD-002012 Cell Access Radius up to 15km is used when the cell radius is no more than

15 km.l LOFD-001009 Extended Cell Access Radius is used when the cell radius ranges from 15

km to 100 km.Extended cell range uses different random access preamble formats to adapt to different roundtrip delays (RTDs). In this document, RTD is the round trip delay between an eNodeB and userequipment (UE).In a mobile communications system, a radio link has two directions: uplink and downlink. Thereis an imbalance between uplink and downlink because they are different in other aspects suchas fading effect, transmit power, antenna gain, and receiver demodulation performance. As aresult, the transmission quality in the uplink is negatively affected in extended coverage.Therefore, coverage enhancement is required to guarantee uplink coverage quality. For details,see 4 Related Features.

2.2 BenefitsThis feature increases cell coverage to meet communication requirements in rural areas andremote areas such as the sea, deserts, and grasslands, and also decreases the costs to deploy sitesin such areas.

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3 Random Access Preamble FormatIn a random access procedure, the eNodeB uses the preamble sequence sent by the UE to estimatethe RTD. RTD increases with the cell radius and is calculated using the following formula:

where R is the cell radius.The random access preamble format determines the amount of resources occupied by thephysical random access channel (PRACH) in the time domain and the cell coverage. Accordingto section 5.7 in 3GPP TS 36.211 V8.6.0 (2009-03), FDD supports random access preambleformats 0-3. Table 3-1 describes the mapping between random access preamble formats andcell radiuses.

Table 3-1 Mapping between FDD random access preamble formats and cell radiusesPreamble Format CP Length TCP (s) Cell Radius (R)

(km)Maximum RTD(s)

0 103.1 R 14.5 96.71 684.4 R 77.3 515.62 203.1 R 29.5 196.83 684.4 R 100 666.7

LBFD-002012 Cell Access Radius up to 15km and LOFD-001009 Extended Cell Access Radiususe random access preamble formats 0 and 1-3, respectively. The random access preambleformat and cell radius are specified by parameters Cell.PreambleFmt and Cell.CellRadiusrespectively. Operators can configure these parameters based on the cell coverage requirements.

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4 Related Features4.1 Features Related to LBFD-002012 Cell Access Radius upto 15kmPrerequisite Features

None

Mutually Exclusive FeaturesNone

Impacted FeaturesNone

4.2 Features Related to LOFD-001009 Extended Cell AccessRadiusPrerequisite Features

None

Mutually Exclusive FeaturesNone

Impacted FeaturesLOFD-001009 Extended Cell Access Radius requires a longer cell radius than macro cells. WhenLOFD-001009 Extended Cell Access Radius is enabled, the following features can be used toenhance the uplink coverage and improve the coverage quality:

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l LOFD-001048 TTI Bundlingl LBFD-00202001 UL 2-Antenna Receive Diversityl LOFD-001005 UL 4-Antenna Receive Diversityl LOFD-070214 UL 8-Antenna Receive Diversityl LOFD-001012 UL Interference Rejection Combining

NOTE

l For details about LOFD-001048 TTI bundling, see Scheduling Feature Parameter Description.l For details about LBFD-00202001 UL 2-Antenna Receive Diversity, LOFD-001005 UL 4-Antenna

Receive Diversity, LOFD-070214 UL 8-Antenna Receive Diversity, and LOFD-001012 ULInterference Rejection Combining, see MIMO Feature Parameter Description.

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5 Network Impact5.1 LBFD-002012 Cell Access Radius up to 15kmSystem Capacity

No impact.

Network PerformanceNo impact.

5.2 LOFD-001009 Extended Cell Access RadiusSystem Capacity

No impact.

Network PerformanceThe impacts of this feature on the network are as follows:l Coverage

The coverage area can be extended to up to 100 km.l Network KPIs

The random access success rate in the coverage area increases.

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6 Engineering Guidelines6.1 When to Use Extended Cell Range

If the cell radius does not exceed 15 km, it is recommended that LBFD-002012 Cell AccessRadius up to 15km be used. It is a basic feature, which does not require activation or deactivation.If the cell radius exceeds 15 km, it is recommended that LOFD-001009 Extended Cell AccessRadius be activated, the Cell.CellRadius parameter be set to a value equal to or greater than theactual cell radius, and the Cell.PreambleFmt parameter be set based on the cell radius.

6.2 Required InformationCollect the following information:l Required cell radius

To resist delay and attenuation caused by extended coverage, the required cell radius mustbe obtained, based on which the related parameters can be set.

l Cell speed flagIn high speed or ultra high speed cells, UE access is affected by parameters other than thosementioned in this document. For details about the cell speed flag, related parameters, andparameter settings, see High Speed Mobility Feature Parameter Description.

6.3 PlanningThis section describes network planning related to extended cell range.

6.3.1 RF PlanningIt is recommended that the following RF planning strategies be used to ensure better servicerates at the cell edge with extended cell range:l Deploying distributed eNodeBs

A distributed eNodeB has two types of basic modules: the baseband unit (BBU) and remoteradio unit (RRU), which are deployed in a distributed architecture. The BBU is installed

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in a cabinet, while RRUs are installed close to the antenna system. Logical modules insideeach RRU include a transmitter, power amplifiers (PAs), and a front receiver. The BBUand RRUs are connected using fiber optic cables. Compared with macro eNodeBs,distributed eNodeBs can reduce feeder cost and loss for the antenna system, obtain a gainin the range of 2.5 to 3 dB, and increase cell coverage.

l Adopting large TX powerA Huawei eNodeB enhances downlink coverage by supporting a maximum of 80 W TXpower, which is much higher than the commonly used 40 W.

l Using TMAsTechnically, a tower-mounted amplifier (TMA) is a low noise amplifier, which improvesthe RX noise figure and RX sensitivity of the eNodeB. On a live network, TMAs areinstalled near RX antennas to improve RX performance.If the equipment room is far from the antenna tower, which can result in a feeder loss greaterthan 2.2 dB, TMAs can be used to eliminate the impact of feeder loss on RX sensitivity.However, the TMAs also bring an insertion loss of about 0.5 dB to the downlink comparedwith a site without TMAs.

6.3.2 Network PlanningAntenna Altitude

Valid antenna altitude consists of two parts: mountain altitude and altitude from the ground tothe antennas. Due to limitations on the altitude of a tower or pole where the antennas are mounted,the maximum altitude from the ground to the antennas is 70 meters. Figure 6-1 shows an exampleof antenna altitude.

Figure 6-1 Example of antenna altitude

On a live network, the valid antenna altitude determines the cell coverage. Therefore, whenplanning the antenna altitude, ensure that the target cell coverage is within line of sight (LOS)areas. Otherwise, non line of sight (NLOS) areas may experience signal attenuation and poorcell coverage due to the earth curvature.For an antenna altitude planned above sea level, Huawei provides a segmentation model todescribe radio propagation over the sea, as shown in Figure 6-2.



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Figure 6-2 Segmentation model for radio propagation on the sea

As shown in the preceding figure:l Ht: indicates the site altitude above sea levell Hr: indicates the UE altitude above sea levell d1: indicates the LOS path A on the seal d2: indicates the LOS path B on the seal Re: indicates the earth radiusl d: indicates path C on the sea, which is a shadow area with poor signal quality due to the

earth curvature, and therefore this path can be ignored during network planningAccording to the Huawei segmentation model for radio propagation on the sea, Table 6-1 andTable 6-2 list the path losses calculated based on the site altitudes, UE altitudes, and LOSdistances above sea level at a site with a center frequency of 800 MHz.

Table 6-1 Path losses calculated based on the site altitudes, UE altitudes (Hr = 2 m), and LOSdistances above sea level at a site with a center frequency of 800 MHz

Ht (m) d1 (km) Path Loss(dB)

d2 (km) d1+d2 (km) Path Loss(dB)

50 29.2 134.4 5.8 35.0 142.960 31.9 135.6 5.8 37.8 143.870 34.5 136.6 5.8 40.3 144.780 36.9 137.5 5.8 42.7 145.490 39.1 138.3 5.8 44.9 146.1100 41.2 139.0 5.8 47.1 146.7



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200 58.3 143.5 5.8 64.1 150.7300 71.4 146.1 5.8 77.2 153.2400 82.5 148.0 5.8 88.3 154.9500 92.2 149.4 5.8 98.0 156.3

Table 6-2 Path losses calculated based on the site altitudes, UE altitudes (Hr = 10 m), and LOSdistances above sea level at a site with a center frequency of 800 MHz



50 29.2 134.4 13.0 42.2 145.360 31.9 135.6 13.0 45.0 146.170 34.5 136.6 13.0 47.5 146.880 36.9 137.5 13.0 49.9 147.590 39.1 138.3 13.0 52.2 148.0100 41.2 139.0 13.0 54.3 148.6200 58.3 143.5 13.0 71.3 152.1300 71.4 146.1 13.0 84.5 154.3400 82.5 148.0 13.0 95.5 155.9500 92.2 149.4 13.0 105.2 157.2

When deploying extended cell range on the sea, calculate the antenna altitude based on the LOSdistances (d1 + d2) as shown in Figure 6-2 and listed in Table 6-1 and Table 6-2. Whendeploying extended cell range in deserts or on grasslands, calculate the antenna altitude basedon the LOS distance d1 as listed in Table 6-1 and Table 6-2.If the antenna altitude of a site is excessively high, the antennas may receive microwave signalsfrom vast areas, which results in interference to radio signals at the site. Therefore, calculate theantenna altitude at an allowable height based on the distance between the site and the target cellcoverage, meeting requirements for deploying extended cell range on the sea.

Site AcquisitionThe deployment of extended cell range requires good radio environment. Therefore, thefollowing requirements must be met for site acquisition:



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l There are no obvious obstacles in the target area to be covered by the eNodeB. LOS areasare preferred.

l The site altitude is as high as possible based on site requirements.l Extended cell coverage provided by the GERAN or UTRAN is preferentially selected as

the target cell coverage for the E-UTRAN.l Other requirements are the same as those for a macro site.

Channel power allocationChannel power is allocated according to the configuration baseline of channel power for macronetworks.

6.3.3 Hardware PlanningAntennas used for deployment of extended cell range must be selected based on the requirementsof each scenario:l In normal scenarios, it is recommended that 18 dBi antennas with a half-power beamwidth

of 65 be used.l On the sea, the antennas are highly mounted to resist the impact of earth curvature.

However, this action may also create coverage holes for areas near the antennas. In thisscenario, the antennas with zero point suppression must be chosen to mitigate the coverageholes. In addition, antennas with smaller surface area are recommended to resist the oceanwind, which also reduces the wind resistance on the tower or pole where the antennas aremounted.

l In open areas, vertically polarized antennas are preferred. If wider cell coverage is required,vertically polarized antennas are recommended.

l Non-RET antennas can be used for normal scenarios that do not require tilt adjustment. Ata site with an ultra high altitude, antenna tilts can be adjusted electrically or mechanicallyto ensure cell coverage for both remote areas and local areas. RET is short for remoteelectrical tilt.

6.4 Deployment6.4.1 RequirementsOperating Environment

Extended cell range applies only to 3900 series base stations.

Transmission NetworkingN/A



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LicenseThe operator has purchased and activated the license for the feature listed in Table 6-3. Fordetails about how to activate a license, see License Management Feature ParameterDescription.

Table 6-3 License information for extended cell rangeFeature ID Feature Name License

Control ItemNE Sales Unit

LOFD-001009 Extended CellAccess Radius

Extended CellAccess Radius(per Cell)(FDD)

eNodeB per cell

6.4.2 Data PreparationThis section describes the data that you need to collect for setting parameters. Required data isdata that you must collect for all scenarios. Collect scenario-specific data when necessary for aspecific feature deployment scenario.There are three types of data sources:l Network plan (negotiation required): parameter values planned by the operator and

negotiated with the evolved packet core (EPC) or peer transmission equipmentl Network plan (negotiation not required): parameter values planned and set by the operatorl User-defined: parameter values set by users.

Required DataN/A

Scenario-specific DataScenario 1: Low Speed Cell



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Parameter Name

ParameterID

Data Source Setting Notes

Preambleformat

Cell.PreambleFmt

Network plan(negotiationnot required)

Adhere to the following principles whensetting this parameter:l If Cell.CellRadius is less than or equal to

14500, Cell.PreambleFmt should rangefrom 0 to 3.

l If Cell.CellRadius is in the interval(14500, 29500], Cell.PreambleFmtshould range from 1 to 3.

l If Cell.CellRadius is in the interval(29500, 77300], Cell.PreambleFmtshould be 1 or 3.

l If Cell.CellRadius is in the interval(77300, 100000], Cell.PreambleFmtshould be 3.Set this parameter based on the value of theCell.CellRadius parameter. For details,see 3 Random Access PreambleFormat.

Cellradius

Cell.CellRadius

Network plan(negotiationnot required)

Set this parameter to a value equal to or greaterthan the required cell radius.

Scenario 2: High Speed or Ultra High Speed Cell



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Parameter Name Parameter ID Data Source Setting NotesPreamble format Cell.PreambleFmt Network plan

(negotiation notrequired)

Adhere to thefollowing principleswhen setting thisparameter:l If

Cell.CellRadiusis less than orequal to 14500,Cell.PreambleFmt should rangefrom 0 to 3.

l IfCell.CellRadiusis in the interval(14500, 29500],Cell.PreambleFmt should rangefrom 1 to 3.

l IfCell.CellRadiusis in the interval(29500, 77300],Cell.PreambleFmt should be 1 or3.

l IfCell.CellRadiusis in the interval(77300, 100000],Cell.PreambleFmtshould be 3.Set this parameterbased on thevalue of theCell.CellRadiusparameter. Fordetails, see 3Random AccessPreambleFormat.



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Parameter Name Parameter ID Data Source Setting NotesCell radius Cell.CellRadius Network plan

(negotiation notrequired)

Set this parameter toa value equal to orgreater than therequired cell radius.The maximum valueis 32800 and 17200for cells supportinghigh speed mobilityand ultra high speedmobility,respectively.

For details about the cell speed flag and other related parameters, see High Speed MobilityFeature Parameter Description.

6.4.3 PrecautionsThe value of the Cell.CellRadius parameter must be greater than or equal to the actual cell radius.Otherwise, UEs at the cell edge may fail to access the network. The configuration of the randomaccess preamble format complies with the mapping between the random access preamble formatsand cell radiuses listed in Table 3-1.

6.4.4 Initial ConfigurationUsing the CME to Perform Batch Configuration for Newly Deployed eNodeBs

Enter the values of the parameters listed in Table 6-4 in a summary data file, which also containsother data for the new eNodeBs to be deployed. Then, import the summary data file into theConfiguration Management Express (CME) for batch configuration. For detailed instructions,see section "Creating eNodeBs in Batches" in the initial configuration guide for the eNodeB.

Table 6-4 Parameters for activating Extended Cell Access RadiusMO Sheet in the

Summary DataFile

Parameter Group Remarks

Cell eNodeB Radio Datasheet

PreambleFmt, Cellradius

Set the parameters byreferring to 6.4.2Data Preparation.

Using the CME to Perform Batch Configuration for Existing eNodeBsBatch reconfiguration using the CME is the recommended method to activate a feature onexisting eNodeBs. This method reconfigures all data, except neighbor relationships, for multipleeNodeBs in a single procedure. The procedure is as follows:



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Step 1 Choose CME > Advanced > Customize Summary Data File (U2000 client mode), or chooseAdvanced > Customize Summary Data File (U2000 client mode), to customize a summarydata file for batch reconfiguration.

NOTE

For context-sensitive help on a current task in the client, press F1.

Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk ConfigurationData (U2000 client mode), or choose LTE Application > Export Data > Export Base StationBulk Configuration Data (CME client mode), to export the eNodeB data stored on the CMEinto the customized summary data file.

Step 3 In the summary data file, set the parameters in the MOs listed in Figure 6-3 and close the file.Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk Configuration

Data (U2000 client mode), or choose LTE Application > Import Data > Import Base StationBulk Configuration Data (CME client mode), to import the summary data file into the CME.

Step 5 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or chooseArea Management > Planned Area > Export Incremental Scripts (CME client mode), toexport and activate the incremental scripts.----End

Using the CME to Perform Single ConfigurationOn the CME, set the parameters listed in the "Data Preparation" section for a single eNodeB.The procedure is as follows:

Step 1 In the planned data area, click Base Station in the upper left corner of the configuration window.Step 2 In area 1 shown in Figure 6-3, select the eNodeB to which the MOs belong.



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Figure 6-3 MO search and configuration window

NOTE

l To view descriptions of the parameters in the MO, click in area 4 and press F1.l Area 5 displays the details of a selected area-4 entry in vertical format. Click the "Details" button to

show or hide this area.

Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL.Step 4 In area 3, double-click the MO in the Object Name column. All parameters in this MO are

displayed in area 4.Step 5 Set the parameters in area 4 or 5.Step 6 Choose CME > Planned Area > Export Incremental Scripts, or choose Area Management

> Planned Area > Export Incremental Scripts, to export and activate the incremental scripts.----End

Using MML CommandsStep 1 Run the MOD CELL command to set the CellRadius parameter as required. Note that the unit

is meter.Step 2 Run the MOD CELL command to set the PreambleFmt parameter by referring to 6.4.2 Data

Preparation.----EndFigure 6-4 shows the parameters for extended cell range.



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Figure 6-4 Parameters for extended cell range

MML Command Examplesl Set the CellRadius parameterMOD CELL: LocalCellId=0, CellRadius=17000;

l Set the PreambleFmt parameterMOD CELL: LocalCellId=0, PreambleFmt=2;

6.4.5 Activation ObservationObserving Preamble Format Configuration

The procedure is as follows:Step 1 Check that the cell has been successfully activated, and then start tracing over the Uu interface.Step 2 Run the MOD CELL command to configure a preamble format for the cell. The cell will be

automatically deactivated and then reactivated. Wait until the cell is up, and check the decimalvalue of the IE prach-ConfigIndex in the first RRC_SYS_INFO (SIB2) message over the Uuinterface. For example, in the following figure, the value of this information element is 3.



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----End

l If the value of this IE is between 0 and 15, Cell.PreambleFmt is set to 0.l If the value of this IE is between 16 and 31, Cell.PreambleFmt is set to 1.l If the value of this IE is between 32 and 47, Cell.PreambleFmt is set to 2.l If the value of this IE is between 48 and 63, Cell.PreambleFmt is set to 3.

Observing Extended Cell Access RadiusThe procedure is as follows:

Step 1 On the U2000, run the LST CELL command and check the value of Cell radius(m). If it is notgreater than 15000, Extended Cell Access Radius has not taken effect. If it is greater than 15000,write it down and proceed to the next step.

Step 2 On the U2000, run the DSP LICINFO command and check the Actual Used valuecorresponding to Extended Cell Access Radius(per Cell)(FDD). If the value is 0, the featurehas not taken effect. If the value is greater than 0, write it down and proceed to the next step.

Step 3 On the U2000, run the MOD CELL command with the Cell.CellRadius parameter set to 10000.If necessary, change the value of the Cell.PreambleFmt parameter.

Step 4 Run the DSP CELL command and verify that the cell has been successfully activated. Run theDSP LICINFO command and check the value of Actual Used corresponding to Extended CellAccess Radius(per Cell)(FDD).l If this value equals that obtained in Step 2, the feature had not been activated before you

modified Cell.CellRadius.



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l If this value equals that obtained in Step 2 minus 1, the feature had already been activatedbefore you modified Cell.CellRadius. Write down this value and proceed to the next step.

Step 5 On the U2000, run the MOD CELL command with Cell.CellRadius set to the value obtainedin Step 1.

Step 6 Run the DSP CELL command and verify that the cell has been successfully activated. Run theDSP LICINFO command and check the value of Actual Used corresponding to Extended CellAccess Radius(per Cell)(FDD). If this value equals that obtained in Step 4 plus 1, the featurehas already been activated.

----End

6.4.6 ReconfigurationN/A

6.4.7 DeactivationUsing the CME to Perform Batch Configuration

Batch reconfiguration using the CME is the recommended method to deactivate a feature oneNodeBs. This method reconfigures all data, except neighbor relationships, for multipleeNodeBs in a single procedure. The procedure for feature deactivation is similar to that forfeature activation described in Using the CME to Perform Batch Configuration for ExistingeNodeBs. In the procedure, modify parameters according to Table 6-5.

Table 6-5 Parameters for deactivating Extended Cell Access RadiusMO Sheet in the

Summary DataFile

Parameter Group Setting Notes

Cell eNodeB Radio Datasheet

Cell radius Set theCell.CellRadiusparameter to a valueless than 15000.

Using the CME to Perform Single ConfigurationOn the CME, set parameters according to Table 6-5. For detailed instructions, see Using theCME to Perform Batch Configuration for Existing eNodeBs for feature activation.

Using MML CommandsTo deactivate Extended Cell Access Radius, run the MOD CELL command on the U2000 withCell.CellRadius set to a value less than 15000.



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MML Command Examplesl Set the CellRadius parameterMOD CELL: LocalCellId=0, CellRadius=10000;

l Set the PreambleFmt parameterMOD CELL: LocalCellId=0, PreambleFmt=0;

6.5 Performance MonitoringCreate signaling tracing tasks to monitor the performance. For details, see 6.4.5 ActivationObservation.

6.6 Parameter OptimizationN/A

6.7 TroubleshootingFault Description

UEs cannot access a cell configured with preamble format 3.

Fault HandlingStep 1 Run the LST CELL command to check whether the value of Cell radius(m) is equal to or

greater than the required cell radius. Change the value to an appropriate one if it is smaller thanthe actual cell radius.

Step 2 If the fault persists, contact Huawei engineers.----End



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7 ParametersTable 7-1 Parameter description

MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

Cell PreambleFmt

ADDCELLMODCELLLSTCELL

LBFD-002010 /TDLBFD-002010

RandomAccessProcedure

Meaning: Indicates the preamble format used in the cell.For details, see 3GPP TS 36.211.GUI Value Range: 0~4Unit: NoneActual Value Range: 0~4Default Value: 0

Cell CellRadius

ADDCELLMODCELLLSTCELL

LBFD-002010 /TDLBFD-002010

RandomAccessProcedure

Meaning: Indicates the radius of the cell.GUI Value Range: 1~100000Unit: mActual Value Range: 1~100000Default Value: 10000

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8 CountersThere are no specific counters associated with this feature.

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9 GlossaryFor the acronyms, abbreviations, terms, and definitions, see Glossary.

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10 Reference Documents1. 3GPP TS 36.201, "Long Term Evolution (LTE) physical layer; General description"2. 3GPP TS 36.211, "Physical channels and modulation"3. Connection Management Feature Parameter Description4. eNodeB Initial Configuration Guide

eRANExtended Cell Range Feature Parameter Description 10 Reference Documents


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Contents1 About This Document1.1 Scope1.2 Intended Audience1.3 Change History1.4 Differences Between eNodeB Types

2 Overview2.1 Introduction2.2 Benefits

3 Random Access Preamble Format4 Related Features4.1 Features Related to LBFD-002012 Cell Access Radius up to 15km4.2 Features Related to LOFD-001009 Extended Cell Access Radius

5 Network Impact5.1 LBFD-002012 Cell Access Radius up to 15km5.2 LOFD-001009 Extended Cell Access Radius

6 Engineering Guidelines6.1 When to Use Extended Cell Range6.2 Required Information6.3 Planning6.3.1 RF Planning6.3.2 Network Planning6.3.3 Hardware Planning

6.4 Deployment6.4.1 Requirements6.4.2 Data Preparation6.4.3 Precautions6.4.4 Initial Configuration6.4.5 Activation Observation6.4.6 Reconfiguration6.4.7 Deactivation

6.5 Performance Monitoring6.6 Parameter Optimization6.7 Troubleshooting

7 Parameters8 Counters9 Glossary10 Reference Documents