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eRAN

Adaptive ICIC Feature Parameter

Description

Issue 04

Date 2014-03-15

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 written

consent of Huawei Technologies Co., Ltd.

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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.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

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,

and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

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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

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Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

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Website: http://www.huawei.com

Email: [email protected]

Issue 04 (2014-03-15) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

http://www.huawei.com/



Contents

1 About This Document..................................................................................................................1

1.1 Scope..............................................................................................................................................................................1

1.2 Intended Audience..........................................................................................................................................................1

1.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................6

2.1 Introduction....................................................................................................................................................................6

2.2 Benefits...........................................................................................................................................................................6

2.3 Architecture....................................................................................................................................................................7

3 Technical Description...................................................................................................................9

3.1 Concepts.........................................................................................................................................................................9

3.1.1 CCU and CEU.............................................................................................................................................................9

3.1.2 ICIC Working Mode....................................................................................................................................................9

3.2 Principles......................................................................................................................................................................11

3.2.1 Starting an Optimization Task...................................................................................................................................12

3.2.2 Identifying Areas with High Interference and Heavy Load......................................................................................13

3.2.3 Configuring and Optimizing ICIC Working Modes and Edge Band Modes............................................................13

4 Related Features...........................................................................................................................15

5 Network Impact...........................................................................................................................17

6 Engineering Guidelines.............................................................................................................18

6.1 When to Use Adaptive ICIC.........................................................................................................................................18

6.2 Required Information...................................................................................................................................................18

6.3 Planning........................................................................................................................................................................20

6.4 Deployment..................................................................................................................................................................20

6.4.1 Process.......................................................................................................................................................................21

6.4.2 Requirements.............................................................................................................................................................21

6.4.3 Data Pre paration........................................................................................................................................................22

6.4.4 Precautions.................................................................................................................................................................32

6.4.5 Initial Configuration..................................................................................................................................................32

6.4.6 Activation Observation..............................................................................................................................................35

6.4.7 Optimization Advice Confirmation and Delivery.....................................................................................................36

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6.4.8 Reconfiguration.........................................................................................................................................................38

6.4.9 Deactivation...............................................................................................................................................................39

6.5 Performance Monitoring...............................................................................................................................................39

6.6 Parameter Optimization................................................................................................................................................40

6.6.1 eCoordinator Parameters...........................................................................................................................................40

6.6.2 eNodeB Parameters...................................................................................................................................................41

6.7 Troubleshooting............................................................................................................................................................42

7 Parameters.....................................................................................................................................44

8 Counters........................................................................................................................................46

9 Glossary.........................................................................................................................................47

10 Reference Documents...............................................................................................................48

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1 About This Document

1.1 Scope

This document describes LOFD-060201 Adaptive Inter-Cell Interference Coordination,

including its technical principles, related features, network impact, and engineering guidelines.

Any managed objects (MOs), parameters, alarms, or counters described herein correspond to

the software release delivered with this document. Any future updates will be described in the

product 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 Audience

This document is intended for personnel who:

l Need to understand the features described herein

l Work with Huawei products

1.3 Change History

This section provides information about the changes in different document versions. There are

two types of changes, which are defined as follows:

l Feature change

Changes in features of a specific product version

l Editorial change

Changes in wording or addition of information that was not described in the earlier version

eRAN6.0 04 (2014-03-15)

This issue includes the following changes.

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Adaptive ICIC Feature Parameter Description 1 About This Document



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ChangeType

Change Description Parameter Change

Feature

change

Modified the mechanism of

optimization task.

Added the followling parameters for the MML

command ADD OPTIFEATURE on theeCoordinator side:

l RunningMode

l HighInterCellInterThd

l ICICAreaAvgInterThd

l HighInterCellRbUsageThd

l HighInterCellUserNumThd

l RegionIdentifySwitch

Editorial

change

Modified the description of

6.2 Required Informationand 6.5 Performance

Monitoring.

None

Added 6.6.2 eNodeB

Parameters.

None

eRAN6.0 03 (2013-08-30)


ChangeType

Change Description ParameterChange

Feature

change

Add the description of adaptive ICIC affects uplink resource

block allocation strategy in 4 Related Features.

None

Editorial

change

None None

eRAN6.0 02 (2013-05-30)


ChangeType


Feature

change

Deleted original section 3.2.2 "Turning on the Adaptive ICIC

Switch." After an adaptive ICIC task starts, the eCoordinator

identifies areas with high interference and heavy load.

None

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ChangeType


Editorialchange None None

eRAN6.0 01 (2013-05-15)


ChangeType


Featurechange

l Added the Min_3(3 Minutes) value for the OptiPeriod parameter.

l Added the description of Min_3(3 Minutes) for the

OptiPeriod parameter in Table 6-2.

ModifiedOptiPeriod

.

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ChangeType


Editorial

change

l Modified the description of scheduling policies for CEUs and

CCUs in 3.1.1 CCU and CEU.l Changed every occurrence of network-level ICIC switch to

adaptive ICIC switch.

l Modified the description of areas where adaptive ICIC is to

be activated in 3.2.1 Starting an Optimization Task .

l Added the description of conditions under which the adaptive

ICIC switch is turned on in section 3.2.2 "Turning on the

Adaptive ICIC Switch."

l Added the description of conditions under which the adaptive

ICIC switch is turned off in section 3.2.2 "Turning on the

Adaptive ICIC Switch."l Modified the description of periodic reconfigurations of the

adaptive ICIC working modes and edge band modes in 3.2.3

Configuring and Optimizing ICIC Working Modes and

Edge Band Modes.

l Added the description of impact on UL MU-MIMO in 4

Related Features.

l Modified the description of the impact on system capacity

and network performance in 5 Network Impact.

l Modified the license requirements for adaptive ICIC in 6.4.2

Requirements.

l Added the description of the recommended settings of

ImplementMode in Table 6-3.

l Added the description of operations on the M2000 in the

application style.

l Modified the descriptions of operations and figures in "Using

the M2000" in 6.4.5 Initial Configuration.

l Added the description for setting the range of NEs to be

managed by the eCoordinator in 6.4.5 Initial

Configuration.

l Added methods for troubleshooting exceptions of

optimization tasks in 6.4.6 Activation Observation.

l Added suggestions for delivering optimization advice in 6.4.7

Optimization Advice Confirmation and Delivery.

l Added the description of fields contained in optimization

advice in 6.4.7 Optimization Advice Confirmation and

Delivery.

l Added the counter L.Thrp.Time.DL. It is used for monitoring

adaptive ICIC performance in 6.5 Performance

Monitoring.

None

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ChangeType


l Modified the description of fault handling in 6.7

Troubleshooting.

eRAN6.0 Draft A (2012-03-25)

This document is created for eRAN6.0.

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2 Overview

2.1 Introduction

ICIC works with scheduling and power control to mitigate inter-cell interference. ICIC divides

the frequency band of a cell into center and edge bands and classifies users into cell center users

(CCUs) and cell edge users (CEUs). With ICIC, the eNodeB schedules CCUs and CEUs on

different cell bands and allocates different power to CCUs and CEUs.

Huawei eNodeBs support static, dynamic, and adaptive ICIC. For details about static ICIC and

dynamic ICIC, see ICIC Feature Parameter Description. This document describes

LOFD-060201 Adaptive Inter-Cell Interference Coordination.

With the eCoordinator for centralized management and eNodeBs for distributed control,

adaptive ICIC automatically adjusts cell edge band modes based on inter-cell interference and

edge load information that is automatically collected and processed. Adaptive ICIC implements

soft frequency reuse and effectively controls inter-cell interference.

Adaptive ICIC takes effect on a per cell basis and is applicable to multi-operator core network

(MOCN) and RAN sharing scenarios.

Adaptive ICIC has the following differences from static ICIC and dynamic ICIC:

l Static ICIC and dynamic ICIC require manual configuration of ICIC switches. Fixed

manual configuration cannot adapt to changes in UE type (CCU or CEU) distribution and

cell load.

l Adaptive ICIC determines whether to enable ICIC in an area based on inter-cell interference

and cell load. In addition, adaptive ICIC automatically configures edge band modes and

optimizes ICIC working modes and edge band modes based on load changes.

2.2 Benefits

Adaptive ICIC offers the following benefits:

l Reduces interference between cells with the same frequency and bandwidth, and increases

CEU throughput.

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l Automatically implements ICIC, reduces operators' workload for ICIC configuration, and

lowers operation costs.

2.3 ArchitectureFigure 2-1 shows the network architecture for adaptive ICIC.

Figure 2-1 Network architecture for adaptive ICIC

In Figure 2-1:

l The blue, purple, and yellow areas indicate different cells under the same eNodeB.

l The black lines illustrate the connections between the eNodeBs and the U2000 before

adaptive ICIC is enabled.

l The red lines illustrate the connections between the eCoordinator and the eNodeBs and

U2000 after adaptive ICIC is enabled.

Table 2-1 describes the functions of NEs involved in adaptive ICIC.

Table 2-1 Functions of NEs involved in adaptive ICIC

NE Function

UE l Measures the reference signal receiving power (RSRP) of the serving cell

and neighboring cells.

l Reports the measurement results to the eNodeB.

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3 Technical Description

3.1 Concepts

3.1.1 CCU and CEU

Similar to static ICIC and dynamic ICIC, adaptive ICIC also classifies UEs into CCUs and CEUs.

For details about how to identify the type of a UE, see ICIC Feature Parameter Description.

CCUs and CEUs are scheduled as follows:

l Power allocation

eNodeBs allocate higher power to CEUs and lower power to CCUs.

l Band allocation

– eNodeBs preferentially schedule CCUs on the center band. If there are remaining

frequency resources on the center band, eNodeBs can also schedule CEUs on the center

band.

– eNodeBs preferentially schedule CEUs on the edge band. If there are remaining

frequency resources on the edge band or CCUs have a higher scheduling priority on the

edge band than CEUs, eNodeBs can also schedule CCUs on the edge band.

3.1.2 ICIC Working Mode

Adaptive ICIC can work in three modes: Reuse1, Reuse3, and Reuse6. The division of a cell

band into center and edge bands varies according to the ICIC working mode.

Reuse1

In Reuse1 mode, the cell band is not divided into center and edge bands. UEs are not classified

into CCUs or CEUs. All UEs share the whole cell band. In the downlink, all UEs use the same

power to receive signals. In the uplink, the transmit power of each UE is determined by the

uplink power control algorithm. For details about power control, see Power Control Feature

Parameter Description.

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All cells work in Reuse1 mode initially. Cells that have the same bandwidth but different

frequencies or have the same frequency but different bandwidths in an area and cells with a

bandwidth of 1.4 MHz or 3 MHz can work only in Reuse1 mode.

Reuse3In Reuse3 mode, 1/3 of the cell band is configured as the edge band, and the remaining 2/3 of

the cell band is configured as the center band. Figure 3-1 shows the Reuse3 mode.

Figure 3-1 Reuse3 mode

As shown in Figure 3-1, there are three edge band modes in Reuse3 mode: Pattern3-1,

Pattern3-2, and Pattern3-3. The three modes correspond to low, medium, and high sub-bands,

respectively. In each mode, the edge band occupies 1/3 of the cell band. For example, if a cell

uses Pattern3-1, the lowest 1/3 of the cell band works as the edge band. Cells that have the same

bandwidth but different frequencies or have the same frequency but different bandwidths in an

area and cells with a bandwidth of 1.4 MHz or 3 MHz cannot work in Reuse3 mode.

Reuse6

In Reuse6 mode, 1/6 of the cell band is configured as the edge band, and the remaining 5/6 of

the cell band is configured as the center band. Figure 3-2 shows the Reuse6 mode.

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Figure 3-2 Reuse6 mode

As shown in Figure 3-2, there are six edge band modes (Pattern6-1 to Pattern6-6) in Reuse6

mode. The six modes correspond to six sub-bands in ascending order of frequency. In each mode,

the edge band occupies 1/6 of the cell band. For example, if a cell uses Pattern6-6, the highest

1/6 of the cell band works as the edge band.

LTE uses Single Carrier - Frequency Division Multiple Access (SC-FDMA) in the uplink.

Therefore, UEs can work only on continuous uplink bands. To prevent the uplink band from

being too fragmented, a cell cannot use the Reuse6 mode in the uplink. In addition, to ensuresufficient downlink bandwidth, cells with a bandwidth of 1.4 MHz, 3 MHz, or 5 MHz cannot

work in Reuse6 mode in the downlink.

3.2 Principles

After adaptive ICIC is activated, the eCoordinator configures and optimizes the ICIC working

modes and edge band modes based on inter-cell interference and cell load. Figure 3-3 shows

the working principles of adaptive ICIC.

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Figure 3-3 Working principles of adaptive ICIC

3.2.1 Starting an Optimization Task

You can select all cells or some cells under the eCoordinator or under a specified eNodeB as the

area for which adaptive ICIC is to be activated, and use the OptiType parameter to determine

whether adaptive ICIC takes effect in uplink, downlink, or both.

Adaptive ICIC can be activated and deactivated using the M2000 or MML commands on the

eCoordinator LMT. After adaptive ICIC is activated, the eCoordinator identifies areas with high

interference and heavy load based on the cell load and inter-cell interference. Based on the

identification results, the eCoordinator configures and optimizes the ICIC working modes and

edge band modes.

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3.2.2 Identifying Areas with High Interference and Heavy Load

In each optimization period, the eCoordinator identifies areas with high interference and heavy

load based on cell load and inter-cell interference information reported by eNodeBs. Based on

the identification results, the eCoordinator configures and optimizes the ICIC working modesand edge band modes.

Areas with High Interference

The RSRP values of the serving cell and neighboring cells reported by UEs are used to determine

whether an area has high interference. The following describes how to identify areas with high

interference:

1. UEs send ICIC A3/A6 measurement reports to the eNodeBs. Each report includes the RSRP

values of the UEs' serving cell and neighboring cells. For details about the description of

events A3 and A6, see ICIC Feature Parameter Description.

2. The eNodeBs calculate unidirectional interference weights based on the reported RSRPvalues, record them in cell-level intra-frequency neighboring relation tables (NRTs), and

periodically report the NRTs to the eCoordinator.

NOTE

A unidirectional interference weight is the weight of the interference generated from one cell to

another cell.

3. The eCoordinator generates a network-level NRT based on the cell-level intra-frequency

NRTs, calculates bidirectional interference weights based on unidirectional interference

weights, and identifies areas with high interference.

NOTE

Bidirectional interference weights refer to the weights of the interference generated from cell A to cell Band from cell B to cell A. An area experiences high interference if the average interference weight of all

cells in this area has reached a certain threshold.

Areas with Heavy Load

The eNodeBs report cell load information to the eCoordinator. The cell load information includes

the average physical radio block (PRB) usage and the average number of to-be-scheduled UEs.

The eCoordinator identifies areas with heavy load based on the cell load information.

If both the percentage of cells whose average PRB usage is greater than 70% and the percentage

of cells whose average number of to-be-scheduled UEs is greater than 2.5 exceed 30%, the

eCoordinator marks the area a heavily loaded cell. Otherwise, the eCoordinator marks the areaa lightly loaded area.

3.2.3 Configuring and Optimizing ICIC Working Modes and EdgeBand Modes

Self-Configuration

The eCoordinator periodically evaluates the cell load and inter-cell interference, based on which

it configures the ICIC working modes and edge band modes.

l For cells in an area with high interference and heavy load, the eCoordinator sets the ICIC

working mode to Reuse3 and configures the edge band mode for each cell. If two cells have

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the same edge band mode, the eCoordinator checks whether the bidirectional interference

weights have reached a certain threshold.

– If so, the eCoordinator changes the ICIC working modes of the two cells to Reuse6 and

configures different edge band modes for the two cells.

–If not, the ICIC working modes and edge band modes of the two cells remain unchanged.

l For cells in an area with high interference and light load, the eCoordinator sets the ICIC

working mode to Reuse1.

l For cells in an area without high interference, the eCoordinator also sets the ICIC working

mode to Reuse1.

Self-Optimization

Inter-cell interference changes with cell load and UE type distribution. Therefore, adaptive ICIC

periodically optimizes the ICIC working modes and edge band modes. After determining the

ICIC working mode in an optimization period, the eCoordinator checks the eNodeB-reported

average number of PRBs used for CEUs. Based on this information, the eCoordinator determines

whether to reconfigure the edge band modes for cells in Reuse3 and Reuse6 modes periodically

(at the second level).

l If the average number of PRBs used for CEUs in a cell is less than 1/6 of the total number

of PRBs on the entire cell band, the eCoordinator sets the ICIC working mode of the cell

to Reuse6 and the cell shrinks its edge band.

l If the average number of PRBs used for CEUs in a cell is greater than 1/3 of the total number

of PRBs on the entire cell band, the cell attempts to expand its edge band. If the edge bands

of neighboring cells are not actually shrunk, the cell fails to expand its edge band and retains

a fixed edge band that is 1/3 of the entire cell band.

l If the average number of PRBs used for CEUs in a cell is greater than 1/6 and less than 1/3

of the total number of PRBs on the entire cell band, the eCoordinator sets the ICIC working

mode of the cell to Reuse3.

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4 Related Features

Prerequisite FeaturesAdaptive ICIC requires support from the following features related to scheduling and power

control:

l LBFD-002025 Basic Scheduling

l LOFD-001015 Enhanced Scheduling

l LOFD-00101502 Dynamic Scheduling

l LBFD-002026 Uplink Power Control

l LBFD-002016 Dynamic Downlink Power Allocation

With features related to scheduling, the eNodeBs schedule the CEUs of a cell on the edge band

of this cell, and therefore mitigate inter-cell interference in the frequency domain. With features

related to power control, the eNodeBs allocate appropriate power resources to CCUs and CEUs,

further reducing inter-cell interference.

Mutually Exclusive Features

In LTE FDD, adaptive ICIC is mutually exclusive with the following static ICIC and dynamic

ICIC features:

l LBFD-00202201 Downlink Static Inter-Cell Interference Coordination

l LOFD-00101401 Downlink Dynamic Inter-Cell Interference Coordination

l LBFD-00202202 Uplink Static Inter-Cell Interference Coordination

l LOFD-00101402 Uplink Dynamic Inter-Cell Interference Coordination

In addition, uplink adaptive ICIC is mutually exclusive to LOFD-003029 SFN.

You can enable only one of the following for a cell: adaptive ICIC, static ICIC, and dynamic

ICIC.

l If static ICIC or dynamic ICIC is enabled on a network where adaptive ICIC has been

enabled, static ICIC or dynamic ICIC will not work.

l If adaptive ICIC is enabled on a network where static ICIC or dynamic ICIC has been

enabled, static ICIC or dynamic ICIC will be automatically disabled. When the

eCoordinator collects network information and determines whether ICIC takes effect, the

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ICIC working mode of the cell is changed to Reuse1. Consequently, the band on which

UEs are scheduled and the power allocated to UEs vary, which causes UE throughput

fluctuation and deteriorates user experience. If UE throughput is too low during handovers

or radio bearer setups, the handover success rate may decrease and the call drop rate may

increase. Therefore, it is recommended that adaptive ICIC not be used together with staticICIC or dynamic ICIC.

Impacted Features

Adaptive ICIC has impacts on scheduling and power control and UL MU-MIMO.

l Adaptive ICIC affects scheduling.

– Adaptive ICIC provides edge band modes and UE types (CCU or CEU) for scheduling.

Adaptive ICIC affects scheduling in both uplink and downlink.

– In adaptive ICIC, the eNodeBs schedule the CEUs of a cell on the edge band and

schedule CCUs preferentially on the center band. The eNodeBs can also schedule CCUs

on the entire cell band. Adaptive ICIC affects scheduling in both uplink and downlink.

– If dynamic UL ICIC has been enabled and the

CellUlschAlgo.UlRbAllocationStrategy parameter (which indicates the uplink

resource block allocation strategy) has been set to FS_INRANDOM_ADAPTIVE(Fs

InRandom Strategy), this parameter is automatically adjusted to

FS_NONFS_ADAPTIVE(Fs nonFs Strategy) when the eNodeB enters the ICIC state.

l Adaptive ICIC provides UE type information for downlink power control.

Downlink power control allocates appropriate power resources to CCUs and CEUs based

on the UE types and the P A values configured for CCUs and CEUs. In Reuse1 mode, all

UEs use the same PA value. For details about the description and configuration of PA, see

Power Control Feature Parameter Description.

l Uplink adaptive ICIC can be used together with LOFD-001002 UL 2x2 MU-MIMO.

However, UL MU-MIMO may not provide the optimal performance gains after uplink

adaptive ICIC is enabled.

This is because UL MU-MIMO aims to increase uplink cell capacity while uplink adaptive

ICIC increases the throughput of CEUs by decreasing the throughput of CCUs to guarantee

cell coverage, and therefore may decrease uplink cell capacity.

l Downlink adaptive ICIC affects SFN.

If multiple physical cells are combined into one single frequency network (SFN) cell, some

edges of the physical cells become part of the SFN cell center. The target cells for downlink

adaptive ICIC change from physical cells to SFN cells.

If other cell parameters remain unchanged, the proportion of DL CEUs and the interference

in the entire network decrease. In this case, downlink adaptive ICIC achieves lower edge

performance gain.

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5 Network Impact

System CapacityAdaptive ICIC increases the throughput of CEUs by reducing inter-cell inter-CEU interference.

Adaptive ICIC reduces the system capacity because the downlink transmit power of CCUs is

reduced. The decrease in system capacity depends on the user distribution in the cell. Generally,

the system capacity does not decrease by more than 5%.

Network Performance

Adaptive ICIC enhances network coverage by increasing the throughput of CEUs.

Adaptive ICIC increases the number of signaling messages over the air interface because:

l Adaptive ICIC requires that UEs detect and report the RSRP of neighboring cells to the

eNodeB in event A3 or A6 to distinguish between CEUs and CCUs in a cell.

l The eNodeB sends UEs the RRC Connection Reconfiguration message, which contains the

setting of UE transmit power.

NOTE

If the network experiences high interference and heavy load, adaptive ICIC optimizes the ICIC working

modes and edge band modes of cells. Otherwise, adaptive ICIC has no impact on network performance.

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6 Engineering Guidelines

6.1 When to Use Adaptive ICIC

Adaptive ICIC can be used when intra-frequency cells of an LTE network cause interference

with each other. It is recommended that adaptive ICIC be activated when intra-frequency cells

experience high interference and heavy load.

Adaptive ICIC does not affect ongoing services and therefore can be activated any time. It is

recommended that adaptive ICIC be activated on the full hour to facilitate performance

measurement.

In a wideband system, uplink and downlink traffic volumes are generally not balanced. As uplink load is greatly lighter than downlink load, uplink adaptive ICIC is not applicable. In this case,

it is recommended that frequency selective scheduling and interference-randomization-based

allocation be used for uplink PRB allocation to achieve edge performance gain while not

sacrificing cell capacity. For details about frequency selective scheduling and interference-

randomization-based allocation, see Scheduling Feature Parameter Description.

As downlink adaptive ICIC has a negative gain in system capacity, it is recommended that

downlink adaptive ICIC work with the frequency selection scheduling mode and the policy of

rounding up the number of required RBGs to achieve larger capacity and better edge

performance.

On commercial networks, it is recommended that the eCoordinator work in static mode andinstruct cells to work in Reuse3 mode.

6.2 Required Information

Before activating adaptive ICIC on an LTE network, collect site information such as inter-site

distance and the counters related to network load and interference.

Counters Related to Network Load

l Numbers of uplink and downlink UEs in a cell

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Counter ID Counter Name Counter Description

1526727378 L.Traffic.User.Avg Average number of UEs

1526727379 L.Traffic.User.Max Maximum number of UEs

1526728445 L.Traffic.ActiveUser.UL.QCI.Tot

al

Total number of activated UEs

with standardized or extended

QCIs in the uplink buffer

1526728969 L.Traffic.ActiveUser.DL.Avg Average number of activated UEs

in the downlink

1526728970 L.Traffic.ActiveUser.DL.Max Maximum number of activated

UEs in the downlink

1526728972 L.Traffic.ActiveUser.UL.Avg Average number of activated UEs

in the uplink

1526728973 L.Traffic.ActiveUser.UL.Max Maximum number of activated

UEs in the uplink

1526728975 L.Traffic.ActiveUser.Avg Average number of activated UEs

1526728976 L.Traffic.ActiveUser.Max Maximum number of activated

UEs

l Average numbers of used uplink and downlink PRBs


1526726737 L.ChMeas.PRB.UL.Used.Avg Average number of used uplink

PRBs

1526726740 L.ChMeas.PRB.DL.Used.Avg Average number of PRBs used by

the PDSCH

1526728479 L.ChMeas.PRB.UL.CEU.Used.A

vg

Average number of uplink PRBs

used by CEUs

1526728480 L.ChMeas.PRB.DL.CEU.Used.A

vg

Average number of downlink

PRBs used by CEUs

Counters Related to Network Interference

l Numbers of uplink and downlink CEUs in a cell


1526727380 L.Traffic.CEU.Avg Average numbers of downlink

CEUs

1526727381 L.Traffic.CEU.Max Maximum numbers of downlink

CEUs

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1526728473 L.Traffic.ULCEU.Avg Average numbers of uplink CEUs

1526728474 L.Traffic.ULCEU.Max Maximum numbers of uplink

CEUs

l Number of times MCS index N ( N = 0 to 31) is selected for PUSCH and PDSCH scheduling

in a cell


1526727412

to

1526727443

L.ChMeas.PUSCH.MCS.0 to

L.ChMeas.PUSCH.MCS.31

Number of times MCS index N

( N = 0 to 31) is selected for

PUSCH scheduling

1526727444to

1526727475

L.ChMeas.PDSCH.MCS.0 toL.ChMeas.PDSCH.MCS.31

Number of times MCS index N ( N = 0 to 31) is selected for

PDSCH scheduling

l Number of times the reported CQI of the whole frequency band is N ( N = 0 to 15) in a cell


1526727396

to

1526727411

L.ChMeas.CQI.DL.0 to

L.ChMeas.CQI.DL.15

Number of times the reported CQI

of the whole frequency band is N

( N = 0 to 15)

6.3 Planning

RF Planning

None

Network Planning

It is recommended that the neighboring cells in an optimization zone use the same frequency

and bandwidth. The cell bandwidth in an optimization zone must be greater than or equal to 5

MHz. If the neighboring cells use different frequencies or bandwidths, adaptive ICIC does not

take effect on the neighboring cells and the neighboring cells only work in Reuse1 mode.

Hardware Planning

The eCoordinator and M2000 must be deployed.

6.4 Deployment

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6.4.1 Process

Figure 6-1 outlines the procedure for deploying adaptive ICIC.

Figure 6-1 Procedure for deploying adaptive ICIC

6.4.2 Requirements

This section describes the deployment requirements for hardware, licenses, and other features.

eNodeB Hardware

eNodeBs are available. Adaptive ICIC is applicable only to macro cells in eRAN6.0 or later,

including:

l LTE macro cells served by single-mode base stations, which are DBS3900 LTE, BTS3900

LTE, BTS3900A LTE, BTS3900L LTE, and BTS3900AL LTE.

l LTE macro cells served by multi-mode base stations, which are DBS3900, BTS3900,

BTS3900A, BTS3900L, and BTS3900AL.

The eCoordinator has been installed, initially configured, and commissioned. The eCoordinator

is available and connected to eNodeBs.

For details about how to install, initially configure, and commission the eCoordinator, see

ECO6910 Installation Guide, ECO6910 Initial Configuration Guide, and ECO6910

Commissioning Guide, respectively.

System Configurations

Intra-frequency neighboring relationships are configured between the cells in an optimization

zone.

License

Operators have purchased and activated the following licenses on the eCoordinator side:

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l ECO6910 Basic Software-LTE FDD (cell)

l ECO6910 LTE FDD Hardware Capacity (per 50 cell)

l Adaptive Inter-Cell Interference Coordination-LTE FDD (cell)

Adaptive Inter-Cell Interference Coordination-LTE FDD (cell) limits the total number of cellsthat can be optimized by adaptive ICIC. If the number of selected cells exceeds the licensed

limit, the eCoordinator reports ALM-51301 Number of Resources Used Exceeding Alarm

Threshold Specified by License.

6.4.3 Data Preparation

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 equipment

l Network plan (negotiation not required): parameter values planned and set by the operator

l User-defined: parameter values set by users

Table 6-1 Parameters for an optimization zone and optimization objects

Parameter Name Parameter ID Data Source Setting Notes

Optimization Zone ID OptiZoneId User-defined This parameter uniquely

identifies an optimization

zone on the eCoordinator.

Optimization Zone

Name

OptiZoneName User-defined This parameter specifies the

optimization zone name.

Optimization Object

Type

OptiObjType Network plan

(negotiation not

required)

This parameter specifies the

type of optimization

objects.

When this parameter is set

to ECO(ECO), the

optimization objects are all

cells managed by the

eCoordinator.


to NE(NE), the

optimization objects are all

cells under the

corresponding NE.


to CELL(CELL), the

optimization object is a

specified cell.

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Parameter Name Parameter ID Data Source Setting Notes

Optimization Object

ID

OptiObjId Network plan

(negotiation not

required)

This parameter uniquely

identifies an optimization

object.When Optimization

Object Type is set to NE,

set this parameter to

NeIndex so that you can run

the LST NE command to

query the indexes of all NEs

managed by the

eCoordinator.

When Optimization

Object Type is set to

CELL, set this parameter toCellIndex so that you can

run the LST LTECELL

command to query the

indexes of all LTE cells

managed by the

eCoordinator.

Optimization Object

RAT

RAT Network plan

(negotiation not

required)

This parameter indicates the

RAT used in a cell to be

optimized.

This parameter is available

only when Optimization

Object Type is set to

CELL.

Table 6-2 Parameters for adaptive ICIC

Parameter Name ParameterID

Data Source Setting Notes

Optimization Type OptiType Network plan

(negotiation

not required)

This parameter specifies the

optimization type for cell edge

bands.

Because traffic volume is large in

the downlink and small in the

uplink, it is good practice to set

this parameter to DL

(DownLink), so that cell edge

bands are optimized only in the

downlink.

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ParameterName

Parameter ID GUI ParameterName on theM2000


Feature Type FeatureType Service Type Network plan(negotiation not

required)

This parameter

specifies

the type of

an

optimizati

on task. If

MML

commands

are used,

set this

parameter

to AICIC

(AICIC).

If the

M2000 is

used,

select LTE

Adaptive

ICIC.

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ParameterName



Optimize CellType OptiCellType Cell Type Network plan(negotiation not

required)

This parameter

specifies

the type of

a cell to be

optimized,

including

FDD,

TDD, or

BOTH (for

MML

command)

/Both (for

the

M2000).

Parameter

values and

their

meanings:

FDD: Only

FDD cells

are

optimized.

TDD:

Only TDD

cells are

optimized.

BOTH/

Both: Both

FDD and

TDD cells

are

optimized.

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ParameterName



OptimizationParameter

Template ID

ParaId Parameter Policy Network plan(negotiation not

required)

This parameter

uniquely

specifies

the ID of

an

optimizati

on

parameter

template.

The

optimizati

on

parameter

template is

added by

running

the ADD

AICICOP

TIPARA

command.

Optimization

Zone ID

OptiZoneId Optimization

Zone

Network plan

(negotiation notrequired)

This

parameter uniquely

specifies

the ID of

an

optimizati

on zone.

The

optimizati

on zone is

added by

runningthe ADD

OPTIZO

NE

command.

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ParameterName



Feature Switch EnableSwitch StartOptimization

Service

Network plan(negotiation not

required)

This parameter

indicates

whether to

enable an

optimizati

on task.

Parameter

values and

their

meanings:

ON:enable

OFF:

disable

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ParameterName



OptimizationImplementation

Mode

ImplementMode Execution Mode Network plan(negotiation not

required)

This parameter

indicates

the mode

for

implement

ing the

optimizati

on advice.

Parameter

values and

their

meanings:

MANUAL

: The

optimizati

on advice

is

implement

ed only

after you

have

confirmed

it.

NOW: The

optimizati

on advice

is

implement

ed

immediate

ly after it is

generated.

TIMER:The

optimizati

on advice

is

automatica

lly

implement

ed at the

scheduled

time.

TheeCoordinat

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ParameterName



or generates

optimizati

on advice

on

reconfigur

ation of

adaptive

ICIC

working

mode

based on

the cell

load and

inter-cell

interferenc

e in an

optimizati

on period.

If

optimizati

on advice

is not

deliveredto

eNodeBs

in time, the

reconfigur

ed ICIC

working

mode will

not adapt

to the cell

load and

inter-cell

interferenc

e in an

optimizati

on period,

weakening

the effect

of adaptive

ICIC. It is

good

practice to

set this

parameter

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ParameterName



to NOWso that the

ICIC

working

mode can

adapt

quickly to

the cell

load and

inter-cell

interferenc

e.

If

OptiPerio

d is set to

Min_3(3

Minutes),

the

optimizati

on advice

will be

frequently

updated on

theM2000,

which

makes it

difficult to

manually

deliver the

optimizati

on advice.

To address

this issue,

setImplemen

tMode to

NOW.

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ParameterName



OptimizationDelivery Time ImplementSched-ule Schedule Time Network plan(negotiation not

required)

This parameter

indicates

the time

that the

optimizati

on advice

is

scheduled

for

delivery.

This

parameter

is used

when

Optimizati

on

Implement

ation

Mode is set

to TIMER.

The

generated

optimization advice

is

delivered

only at the

scheduled

time.

6.4.4 Precautions

None

6.4.5 Initial Configuration

Adaptive ICIC can be initially configured using the M2000 or using MML commands on the

eCoordinator LMT. It is recommended that the M2000 be used to initially configure adaptive

ICIC because the NEs to be managed by the eCoordinator can be added only on the M2000

client.

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Using the M2000

Before initially configuring adaptive ICIC, upload the eCoordinator mediation software to the

M2000 server. To initially configure adaptive ICIC on the M2000 client, perform the following

operations:

Step 1 Configure the range of NEs to be managed by the eCoordinator.

1. Log in to the M2000 client. Choose Configuration > eCoordinator Settings (traditional

style), or double-click Configuration and then choose Settings > eCoordinator

Settings (application style).

The eCoordinator Settings window is displayed.

2. Click the NE Settings tab in the eCoordinator Settings window. Choose the target

eCoordinator in the navigation tree and click , or right-click the eCoordinator and choose

Modify from the shortcut menu.

The Setting dialog box is displayed, as shown in Figure 6-2.

Figure 6-2 Setting dialog box

3. Under Available NEs, select the NEs to be managed by the eCoordinator and add them to

Selected NEs. Click Next.

4. Specify User Name and Password, and then Click OK .

5. Click to update the range of NEs to be managed by the eCoordinator.

Step 2 Specify the zone to be optimized by the eCoordinator.

1. Click the Zone Settings tab in the eCoordinator Settings window. Click .

The Add Zone dialog box is displayed, as shown in Figure 6-3.

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Figure 6-3 Add Zone dialog box

NOTE

Cells under a newly added NE will be displayed under Available Objects ten minutes after the NE

is added.

2. In the Add Zone dialog box, type the Zone Name. Select the optimization objects under

Available Objects, add them to Selected Objects, and click OK .

3. Click to update the optimization zones.

Step 3 Set the optimization parameters.

1. Log in to the M2000 client. Choose SON > LTE Adaptive ICIC (traditional style), or

double-click SON and then choose Self Optimization > LTE Adaptive ICIC

(application style).

The LTE Adaptive ICIC window is displayed.

2. On the Parameter Policy tab page, select the target eCoordinator and click to create

optimization parameters. Set the parameter values and then click Save. For parameter

details, see Table 6-2.

Step 4 Create an optimization task.

1. Click the Optimization Management tab in the LTE Adaptive ICIC window. Click

to create an optimization task.

The Create Optimization Service dialog box is displayed.

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2. Set the parameter values and click OK in the Create Optimization Service dialog box.

For parameter details, see Table 6-3.

----End

Using MML Commands

To initially configure adaptive ICIC using MML commands, add NEs to be managed by the

eCoordinator on the M2000 client and then log in to the eCoordinator LMT to perform the

following operations:

NOTE

For details about how to add NEs to be managed on the M2000 client, see Step 1 in Using the M2000.

Step 1 Run the ADD OPTIZONE command to add an optimization zone. For parameter details, see

Table 6-1.

Step 2 Run the ADD OPTIOBJ command to add an optimization object. For parameter details, seeTable 6-1.

Step 3 Run the ADD AICICOPTIPARA command to add optimization parameters for adaptive ICIC.

For parameter details, see Table 6-2.

Step 4 Run the ADD OPTIFEATURE command to add an optimization task. For parameter details,

see Table 6-3.

----End

6.4.6 Activation Observation

Using the M2000

Use either of the following methods to check the running status of adaptive ICIC on the M2000.

l Checking the value of the Status field

On the Optimization Management tab page, select an optimization task and click .

Check the value of the Status field in the displayed Query Optimization Service dialog

box.

– The value Running indicates that the task is running properly, as shown in Figure

6-4. When the optimization is complete, the value of the Status field changes to

Completed. The system displays the optimization advice on the Optimization

Advice tab page in the right pane of the Optimization Management tab page.

– The value Exception indicates that the task failed. For the troubleshooting method, refer

to the procedur es for handling ALM-51304 Task Running Abnormal in ECO6910

Alarm Reference.

– The value Stopped indicates that the task has been stopped. Click to restart the task.

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Figure 6-4 Querying the status of an optimization task

l Checking the SON logs

The M2000 logs the optimization tasks related to adaptive ICIC. To check the logs for the

task status, do as follows:

Step 1 On the M2000 client, choose SON > SON Log.

The SON Log window is displayed.

Step 2 Click the Query SON Log tab. On the tab page, set Log Category to Adaptive ICIC Log, set

Event Name to Not Limited, and set Event Source Object and Time Period as required.

Step 3 Click Synchronize in the lower right corner of the SON Log window.

Step 4 Click Query.

----End

Using MML Commands

Run the DSP OPTIFEATURE command to check the running status of the optimization task.

In the command output:

l If the value of State is Running, the optimization task is running properly.

l If the value of State is Stopped, the optimization task has been stopped. To restart the

optimization task, run the MOD OPTIFEATURE command with Feature Switch set to

ON(ON).

l If the value of State is Abnormal, the optimization task failed. To troubleshoot, refer to

the procedures for handling ALM-51304 Task Running Abnormal in ECO6910 Alarm

Reference.

6.4.7 Optimization Advice Confirmation and Delivery

If the Optimization Implementation Mode parameter is set to MANUAL(MANUAL), the

generated optimization advice must be confirmed by the operator before it can be delivered to

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eNodeBs. It is recommended that the latest batch of optimization advice be used. and all of the

optimization advice in the same batch must be delivered together.

NOTE

lIf the delivered optimization advice is not the latest, the reconfigured ICIC working mode will notadapt to the cell load and inter-cell interference, thereby adversely affecting the network performance.

l The M2000 delivers all of the optimization advice in the same batch to eNodeBs, even if you choose

to deliver some pieces of optimization advice in a batch.

It is good practice to use the M2000 to view and deliver the optimization advice. If an

optimization task is started using MML commands, the M2000 automatically displays the

optimization advice.

To confirm and deliver the optimization advice, perform the following operations:

Step 1 On the M2000 client, choose SON > LTE Adaptive ICIC (traditional style), or double-click

SON and then choose Self Optimization > LTE Adaptive ICIC (application style).

The LTE Adaptive ICIC window is displayed.

Step 2 On the Optimization Management tab page, click the Optimization Advice tab.

Step 3 On the Optimization Advice tab page,select a piece of optimization advice and click to

deliver it. The progress bar shows the progress for the delivery and implementation of the

optimization advice, as shown in Figure 6-5.

Figure 6-5 Optimization advice

----End

The optimization advice involves the following fields:

l CGI (MCC-MNC-eNodeB ID-Cell ID)

l eNodeB Name

l Cell Name

l DlEarfcn

l DlBandWidth

l UL BandMode

l UL Suggestion

l DL BandMode

l DL Suggestion

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l Cell FDD TDD Indication

l Generated On

l Execution Time

lOperation Type

l Operation Status

l Rollback Time

6.4.8 Reconfiguration

Using the M2000

To reconfigure adaptive ICIC on the M2000 client, perform the following operations:

If… Then…

Modify

parameters

for an

optimization

zone.

1. On the M2000 client, choose Configuration > eCoordinator Settings

(traditional style), or double-click Configuration and then choose

Settings > eCoordinator Settings (application style). The eCoordinator

Settings window is displayed.

2. On the Zone Settings tab page, click to modify parameters for an

optimization zone.

Modify the

parameter

policy.

1. On the M2000 client, choose SON > LTE Adaptive ICIC (traditional

style), or double-click SON and then choose Self Optimization > LTE

Adaptive ICIC (application style). The LTE Adaptive ICIC window is

displayed.

2. Click the Parameter Policy tab and click to modify the settings of the

optimization parameters.

NOTE

If an optimization task using a parameter policy is currently underway, modifying the

Optimization Type parameter of the parameter policy will restart this task. The

optimization period for an optimization task restarts from the time when the optimization

task is restarted.

Modify the

execution

mode.

1. On the M2000 client, choose SON > LTE Adaptive ICIC (traditional

style), or double-click SON and then choose Self Optimization > LTE

Adaptive ICIC (application style). The LTE Adaptive ICIC window isdisplayed.

2. Click the Optimization Management tab and click . The Modify

Optimization Task dialog box is displayed.

3. Change the value of Execution Mode.

Using MML Commands

To reconfigure adaptive ICIC using MML commands, perform the following operations as

required.

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To… Do…

Modify the optimization

zone.

Run the ADD OPTIZONE command to add a zone.

Modify the optimization

objects.

Run the ADD OPTIOBJ command to add an object.

Modify the parameter

settings for adaptive ICIC.

Run the MOD AICICOPTIPARA command.

NOTE

If an optimization task using a parameter policy is currently

underway, modifying the Optimization Type parameter of the

parameter policy will restart this task. The optimization period for an

optimization task restarts from the time when the optimization task is

restarted.

Modify the parameters for an

optimization task.

Run the MOD OPTIFEATURE command.

6.4.9 Deactivation

Using the M2000

Select the adaptive ICIC feature on the M2000 and click to deactivate it.

Using MML CommandsRun the MOD OPTIFEATURE command with Feature Switch set to OFF(OFF) to stop the

optimization task.

6.5 Performance Monitoring

Check the changes in the following items after adaptive ICIC is activated:

l Uplink and downlink CEU throughput

l Average uplink and downlink edge spectral efficiency

l Number of times different modulation and coding scheme (MCS) indexes are scheduled inthe uplink and downlink

These changes reflect the effect of adaptive ICIC. The average edge spectral efficiency can be

calculated using the following formula:

Average edge spectral efficiency = Total bits of user data from CEUs in a cell/(Total duration

for transmission of CEU data in a cell x Average number of PRBs used by CEUs in a cell)

Table 6-4 lists the counters used to monitor adaptive ICIC.

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Table 6-4 Counters used to monitor adaptive ICIC

Counter ID Counter Name Description

1526728475 L.Thrp.bits.UL.CEU Total bits of user data received at the PDCP

layer from uplink cell edge UEs (CEUs) ina cell

1526728476 L.Thrp.Time.UL.CEU Total duration for the PDCP layer receiving

user data from uplink cell edge UEs (CEUs)

in a cell

1526728477 L.Thrp.bits.DL.CEU Total bits of user data transmitted at the

PDCP layer to the downlink cell edge UEs

(CEUs) in a cell

1526728478 L.Thrp.Time.DL.CEU Total duration for the PDCP layer

transmitting user data to the downlink cell

edge UEs (CEUs) in a cell

1526728479 L.ChMeas.PRB.UL.CEU.

Used.Avg

Average number of PRBs used by the uplink

CEUs in a cell

1526728480 L.ChMeas.PRB.DL.CEU.

Used.Avg

Average number of PRBs used by the

downlink CEUs in a cell

1526727444 to

1526727475

L.ChMeas.PDSCH.MCS.0

to

L.ChMeas.PDSCH.MCS.

31

Number of times MCS index 0 is scheduled

on the PDSCH to Number of times MCS

index 31 is scheduled on the PDSCH

1526727412 to

1526727443

L.ChMeas.PUSCH.MCS.0

to

L.ChMeas.PUSCH.MCS.

31

Number of times MCS index 0 is scheduled

on the PUSCH to Number of times MCS

index 31 is scheduled on the PUSCH

1526728262 L.Thrp.Time.DL Total transmit duration of downlink PDCP

SDUs in a cell

1526728261 L.Thrp.bits.DL Total traffic volume of downlink PDCP

SDUs in a cell

6.6 Parameter Optimization

6.6.1 eCoordinator Parameters

l The Optimization Period parameter specifies how often the eCoordinator analyzes

network conditions and provides the optimization advice.

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– If the parameter value is too large, the cell mode and network performance remain stable

for a long period of time. However, the cell mode cannot be updated in a timely manner

if the interference or cell load varies, which may adversely affect network performance.

– If the parameter value is too small, the eCoordinator can trace changes in network

conditions quickly and provide the appropriate optimization advice. However, theeCoordinator will be heavily loaded for a long period of time and may cause fluctuations

in network performance.

In most cases, retain the default value of the Optimization Period parameter, which is

Hour_1(1 Hour). However, the parameter value can be modified as required. For

details, see 6.4.8 Reconfiguration.

l Optimization objects are cells to be optimized by adaptive ICIC. All of the cells to be

optimized form an optimization zone. You can add or remove objects to adjust the range

of an optimization zone. It is recommended that cells providing continuous coverage be

selected to form an optimization zone. For details, see 6.4.8 Reconfiguration.

6.6.2 eNodeB Parameters

Offset Parameters of ICIC A3 and A6 Events

The offset parameters of downlink ICIC A3 event, downlink ICIC A6 event, and uplink ICIC

A3 event are specified by the CellDLIcicMcPara. A3Offset , CellDLIcicMcPara. A6Offset , and

CellULIcicMcPara. A3Offset parameters, respectively. These parameters are used to adjust the

number of CEUs by adjusting the edge scope reported in ICIC events. When CEUs in an area

accounts for about 1/3 of the total number of UEs in this area, ICIC achieves the best

performance.

The parameter settings have the following impact:

l If one of these parameters is adjusted to a large value, it is difficult to trigger the reporting

of the corresponding ICIC event. As a result, the number of CEUs decreases, and some

UEs are no longer regarded as CEUs and no longer coordinated by the eNodeB. In the

uplink, these UEs are scheduled on the center band, which leads to high interference with

neighboring cells and affects the CEU performance of neighboring cells. In the downlink,

these UEs are regarded as CCUs and scheduled with low power, which deteriorates the

performance of these UEs.

l If one of these parameters is adjusted to a small value, it is easy to trigger the reporting of

the corresponding ICIC event. As a result, the number of CEUs increases, and some CEUs

that really require performance improvement cannot be coordinated and therefore their

performance deteriorates.

In conclusion, if the proportion of CEUs is far beyond or below 1/3 in an area during a period,

adjust the corresponding parameter and enable the proportion to be closer to 1/3. The average

number of uplink CEUs is measured by the L.Traffic.ULCEU.Avg counter, and the average

number of downlink CEUS is measured by the L.Traffic.CEU.Avg counter.

Scheduling Policy Used in Downlink ICIC

The scheduling policy used in downlink ICIC is specified by the

CellDlschAlgo. DlIcicSchMode parameter:

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l The parameter value EDGE_USER_NO_PRIO(Edge User No Prio) indicates that CCUs

can preempt the edge band and therefore CCUs have better performance than CEUs.

l The parameter value EDGE_USER_PRIO(Edge User Prio) indicates that CCUs can be

scheduled on the edge band only after CEUs are scheduled on the edge band and therefore

CEUs have better performance than CCUs.

In conclusion, you can adjust the performance of CEUs or CCUs by adjusting the scheduling

policy used in downlink adaptive ICIC.

G Factor Threshold Used in Downlink Adaptive ICIC

The G factor threshold for determining the type of a UE is specified by the

CellDlIcic. DlIcicUserAttrGfactorThd parameter. When downlink adaptive ICIC is enabled,

UEs whose G factor values are less than the G factor threshold are selected as CEUs.

The parameter settings have the following impact:

l If this parameter is adjusted to a large value, the number of CEUs increases.

l If this parameter is adjusted to a small value, the number of CEUs decreases.

When downlink adaptive ICIC is enabled, you can determine the parameter value based on the

MCS distribution of UEs in an area and enable the proportion of CEUs to be closer to 1/3.

6.7 Troubleshooting

Optimization Task Startup Failure

If an optimization task fails to start, perform the following operations:

Step 1 Check whether ALM-51301 Number of Resources Used Exceeding Alarm Threshold Specified

by License has been reported.

l If so, clear the alarm by following the procedures provided in ECO6910 Alarm Reference.

l If not, go to Step 2.

Step 2 Check whether ALM-51304 Task Running Abnormal has been reported.

l If so, clear the alarm by following the procedures provided in ECO6910 Alarm Reference.

l If not, contact Huawei engineers.

----End

Optimization Advice Delivery Failure

If the optimization advice fails to be delivered, check whether ALM-51153 eCoordinator and

NE Disconnect Alarm has been reported.

l If so, clear the alarm by following the procedures provided in ECO6910 Alarm

Reference.

l If not, contact Huawei engineers.

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No Optimization Advice Generated by Adaptive ICIC

When the optimization period arrives but the eCoordinator does not generate any optimization

advice, perform the following operations:

Step 1 Check for a cell using a different frequency or bandwidth from its neighboring cells in theoptimization zone.

Adaptive ICIC is only applicable when neighboring cells use the same frequency and bandwidth.

If a cell in the optimization zone uses a different frequency or bandwidth from its neighboring

cells, the eCoordinator does not generate any optimization advice for the cell. If all of the

neighboring cells in the optimization zone use the same frequency and bandwidth but the

eCoordinator does not generate any optimization advice, go to Step 2.

Step 2 Check the average inter-cell interference in the optimization zone. For details, see 6.2 Required

Information.

On networks where the distance between eNodeBs is large or the number of CEUs is small,inter-cell interference is low and therefore the eCoordinator does not generate any optimization

advice. If the inter-cell interference reaches a specified value in the optimization zone but the

eCoordinator does not generate any optimization advice, contact Huawei engineers.

----End

Alarms Related to Adaptive ICIC

Table 6-5 lists the alarms related to adaptive ICIC.

Table 6-5 Alarms related to adaptive ICIC

Alarm ID Alarm Name NE

51153 eCoordinator and NE

Disconnect Alarm

eCoordinator

51301 Number of Resources Used

Exceeding Alarm Threshold

Specified by License

eCoordinator

51304 Task Running Abnormal eCoordinator

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7 Parameters

Table 7-1 Parameter description

MO Parameter ID MMLCommand

Feature ID Feature Name Description

CellUlschAlgo UlRbAllocation

Strategy

MOD

CELLULSCHA

LGO

LST

CELLULSCHA

LGO

None None Meaning:Indi-

cates the

strategy for

allocating

resource blocks

(RBs) in the

uplink of the

cell. If this

parameter is set

to

FS_NONFS_A

DAPTIVE, this

strategy

adaptively

switches

between

frequency

selective

scheduling and

non-frequencyselective

scheduling. If

this parameter is

set to

FS_INRANDO

M_ADAPTIVE

, this strategy

adaptively

switches

between

frequency

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44



MO Parameter ID MMLCommand

Feature ID Feature Name Description

selective

scheduling andinterference-

randomization-

based

scheduling.

GUI Value

Range:FS_NON

FS_ADAPTIVE

(Fs nonFs

Strategy),

FS_INRANDO

M_ADAPTIVE

(Fs InRandom

Strategy)

Unit:None

Actual Value

Range:FS_NON

FS_ADAPTIVE

,

FS_INRANDO

M_ADAPTIVE

Default

Value:FS_NONFS_ADAPTIVE

(Fs nonFs

Strategy)

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8 Counters

There are no specific counters associated with this feature.

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Adaptive ICIC Feature Parameter Description 8 Counters



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9 Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.

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Adaptive ICIC Feature Parameter Description 9 Glossary



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10 Reference Documents

1. 3GPP TS 36.213, "Physical layer procedures"

2. 3GPP TS 36.331, "RRC Protocol Specification"

3. ICIC Feature Parameter Description

4. Power Control Feature Parameter Description

eRAN

Adaptive ICIC Feature Parameter Description 10 Reference Documents