Wimax Network Impact Report v3r2c03

8/13/2019 Wimax Network Impact Report v3r2c03

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WiMAX BTS

V300R003C01

Network Impact Report(Compared with V300R002C03)

Issue Draft A

Date 2011-07-15

HUAWEI TECHNOLOGIES CO., LTD.


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Issue Draft A (2011-07-15) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd

i

Copyright Huawei Technologies Co., Ltd. 2011. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior

written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks 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 orrepresentations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

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Website: http://www.huawei.com

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WiMAX BTS V300R003C01

Network Impact Report (Compared with V300R002C03) About This Document



ii

About This Document

PurposeThis document describes the impacts of the functions added or enhanced in V300R003C01 on

V300R002C03. It is useful for you prepare for future network upgrades.

This document is only for reference.

Intended AudienceThis document is intended for:

Network planning engineers

System engineers

Network operators

Change HistoryChanges between document issues are cumulative. The latest document issue contains all thechanges in earlier issues.

Issue Draft A (2011-07-15)

This is the draft A release.


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Network Impact Report (Compared with V300R002C03) Contents



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Contents

About This Document .................................................................................................................... ii1 Overview ......................................................................................................................................... 1

1.1 Capacity and Performance ............................................................................................................................... 11.1.1 System Capacity .............................................................. ................................................................. ....... 11.1.2 Network Performance ..................................................................................... ........................................ 2

1.2 Hardware ............................................................ ................................................................. ............................. 21.3 Implementation ................................................................................................................................................ 31.4 License ............................................................................................................................................................. 41.5 Interfaces ............................................................ ................................................................. ............................. 4

1.5.1 Inter-NE Interfaces .......................................................... .............................................................. .......... 41.5.2 Man-Machine Interfaces ...................................................................... ................................................... 5

1.6 Operation and Maintenance ............................................................................................................................. 71.7 Other NEs ........................................................... ................................................................. ............................. 91.8 Other Features ................................................................................................................................................ 10

2 Summary of Function Impacts ................................................................................................. 113 Impacts of V300R003C01 Functions on V300R002C03 ......................................................... 13

3.1 Enhanced Multi-Carrier Load Balancing ....................................................................................................... 133.1.1 Description ........................................................... ................................................................. ................ 133.1.2 Capacity and Performance ................................................................... ................................................. 133.1.3 Hardware .............................................................. ................................................................. ................ 143.1.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 143.1.5 Operation and Maintenance ................................................................. ................................................. 14

3.1.6 Other NEs ............................................................................................................................................. 153.1.7 Other Features ............................................................................................................ ........................... 15

3.2 UL EFFR ............................................................ ................................................................. ........................... 153.2.1 Description ........................................................... ................................................................. ................ 153.2.2 Capacity and Performance ................................................................... ................................................. 163.2.3 Hardware .............................................................. ................................................................. ................ 163.2.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 163.2.5 Operation and Maintenance ................................................................. ................................................. 173.2.6 Other NEs ............................................................................................................................................. 223.2.7 Other Features ............................................................................................................ ........................... 22


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3.3 DL EFFR ............................................................ ................................................................. ........................... 223.3.1 Description ........................................................... ................................................................. ................ 223.3.2 Capacity and Performance ................................................................... ................................................. 233.3.3 Hardware .............................................................. ................................................................. ................ 233.3.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 233.3.5 Operation and Maintenance ................................................................. ................................................. 243.3.6 Other NEs ............................................................................................................................................. 253.3.7 Other Features ............................................................................................................ ........................... 25

3.4 UL SDMA .......................................................... ................................................................. ........................... 253.4.1 Description ........................................................... ................................................................. ................ 253.4.2 Capacity and Performance ................................................................... ................................................. 263.4.3 Hardware .............................................................. ................................................................. ................ 263.4.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 263.4.5 Operation and Maintenance ................................................................. ................................................. 273.4.6 Other NEs ............................................................................................................................................. 273.4.7 Other Features ............................................................................................................ ........................... 28

3.5 Interference Countermeasures ............................................................. ........................................................... 283.5.1 Description ........................................................... ................................................................. ................ 283.5.2 Capacity and Performance ................................................................... ................................................. 283.5.3 Hardware .............................................................. ................................................................. ................ 283.5.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 283.5.5 Operation and Maintenance ................................................................. ................................................. 283.5.6 Other NEs ............................................................................................................................................. 293.5.7 Other Features ............................................................................................................ ........................... 29

3.6 DL Power Control ......................................................................................... ................................................. 303.6.1 Description ........................................................... ................................................................. ................ 303.6.2 Capacity and Performance ................................................................... ................................................. 303.6.3 Hardware .............................................................. ................................................................. ................ 303.6.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 303.6.5 Operation and Maintenance ................................................................. ................................................. 303.6.6 Other NEs ............................................................................................................................................. 313.6.7 Other Features ............................................................................................................ ........................... 31

3.7 MCS Level Selection Optimized When IRC Is Enabled ................................................................ ................ 313.7.1 Description ........................................................... ................................................................. ................ 313.7.2 Capacity and Performance ................................................................... ................................................. 323.7.3 Hardware .............................................................. ................................................................. ................ 323.7.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 323.7.5 Operation and Maintenance ................................................................. ................................................. 323.7.6 Other NEs ............................................................................................................................................. 333.7.7 Other Features ............................................................................................................ ........................... 33

3.8 UL SBC-REQ Coverage Optimized .............................................................. ................................................. 333.8.1 Description ........................................................... ................................................................. ................ 33


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3.8.2 Capacity and Performance ................................................................... ................................................. 333.8.3 Hardware .............................................................. ................................................................. ................ 333.8.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 333.8.5 Operation and Maintenance ................................................................. ................................................. 343.8.6 Other NEs ............................................................................................................................................. 343.8.7 Other Features ............................................................................................................ ........................... 34

3.9 Air Interface Synchronization Clock System ...................................................................... ........................... 353.9.1 Description ........................................................... ................................................................. ................ 353.9.2 Capacity and Performance ................................................................... ................................................. 353.9.3 Hardware .............................................................. ................................................................. ................ 353.9.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 353.9.5 Operation and Maintenance ................................................................. ................................................. 353.9.6 Other NEs ............................................................................................................................................. 363.9.7 Other Features ............................................................................................................ ........................... 36

3.10 HARQ Category 5 and Category 6 .............................................................. ................................................. 363.10.1 Description ......................................................... ................................................................. ................ 363.10.2 Capacity and Performance ................................................................. ................................................. 363.10.3 Hardware ............................................................ ................................................................. ................ 363.10.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 363.10.5 Operation and Maintenance ............................................................... ................................................. 363.10.6 Other NEs............................................................................................................................................ 373.10.7 Other Features .......................................................................................................... ........................... 37

3.11 Beamforming ............................................................... ................................................................. ................ 373.11.1 Description ......................................................... ................................................................. ................ 373.11.2 Capacity and Performance ................................................................. ................................................. 373.11.3 Hardware ............................................................ ................................................................. ................ 373.11.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 373.11.5 Operation and Maintenance ............................................................... ................................................. 373.11.6 Other NEs ........................................................... ................................................................. ................ 463.11.7 Other Features .......................................................................................................... ........................... 46

3.12 UL 64QAM ...................................................... ................................................................. ........................... 463.12.1 Description ......................................................... ................................................................. ................ 463.12.2 Capacity and Performance ................................................................. ................................................. 473.12.3 Hardware ............................................................ ................................................................. ................ 473.12.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 473.12.5 Operation and Maintenance ............................................................... ................................................. 473.12.6 Other NEs............................................................................................................................................ 483.12.7 Other Features .......................................................................................................... ........................... 48

3.13 Enhanced Assignment ............................................................ ................................................................. ..... 493.13.1 Description ......................................................... ................................................................. ................ 493.13.2 Capacity and Performance ................................................................. ................................................. 493.13.3 Hardware ............................................................ ................................................................. ................ 49


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3.13.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 493.13.5 Operation and Maintenance ............................................................... ................................................. 493.13.6 Other NEs............................................................................................................................................ 503.13.7 Other Features .......................................................................................................... ........................... 50

3.14 Inter-User QoS ............................................................................................................................................. 513.14.1 Description ......................................................... ................................................................. ................ 513.14.2 Capacity and Performance ................................................................. ................................................. 513.14.3 Hardware ............................................................ ................................................................. ................ 513.14.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 513.14.5 Operation and Maintenance ............................................................... ................................................. 513.14.6 Other NEs............................................................................................................................................ 563.14.7 Other Features .......................................................................................................... ........................... 56

3.15 Power Saving Scheduling ................................................................. ............................................................ 563.15.1 Description ......................................................... ................................................................. ................ 563.15.2 Capacity and Performance ................................................................. ................................................. 573.15.3 Hardware ............................................................ ................................................................. ................ 573.15.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 573.15.5 Operation and Maintenance ............................................................... ................................................. 573.15.6 Other NEs............................................................................................................................................ 573.15.7 Other Features .......................................................................................................... ........................... 57

3.16 R6 Interoperability Based on the NWG R1.2 or NWG R1.3 ................................. ...................................... 573.16.1 Description ......................................................... ................................................................. ................ 573.16.2 Capacity and Performance ................................................................. ................................................. 583.16.3 Hardware ............................................................ ................................................................. ................ 583.16.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 583.16.5 Operation and Maintenance ............................................................... ................................................. 583.16.6 Other NEs............................................................................................................................................ 593.16.7 Other Features .......................................................................................................... ........................... 59

A Terms ............................................................................................................................................ 61B Acronyms and Abbreviations .................................................................................................. 62


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Network Impact Report (Compared with V300R002C03) 1 Overview



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1 Overview1.1 Capacity and Performance

1.1.1 System Capacity

DBS3900 A maximum of three baseband boards can be installed in a DBS3900, and each baseband

board supports a maximum of three sector carriers.

Compared with V300R002C03, V300C003C01 has a better the performance of the BWA

baseband processing and radio interface unit ver. b (BBBIb) and BBBI.

Each BBBIb or BBBI serves a maximum of 200 active mobile stations (MSs) foreach sector carrier in partial usage of subchannels (PUSC) with all subchannels mode

when the bandwidth is 10 MHz. 70% of the active MSs are configured with one pairof best effort (BE) service flows and the remaining 30% with one pair of BE serviceflows and one pair of extended real-time polling service (ertPS) flows.

The long-term evolution baseband processing unit version c (LBBPc) has been added in

DBS3900 WiMAX V300R003C01. Each LBBPc serves a maximum of 256 active MSsfor each sector carrier in PUSC with all subchannels mode when the bandwidth is 10

MHz. 70% of the active MSs are configured with one pair of BE service flows, and theremaining 30% with one pair of BE service flows and one pair of ertPS service flows.

Compared with V300R002C03, V300R003C01 has a higher peak throughput. Thedownlink (DL) peak throughput of one sector carrier reaches 31.41 Mbit/s with

multiple-input multiple-output (MIMO) Matrix B enabled, and the uplink (UL) peakthroughput of one sector carrier reaches 9 Mbit/s with UL collaborative spatial

multiplexing (CSM) or space division multiple access (SDMA) enabled

The DL-to-UL subframe ratio is 29:18 in PUSC with all subchannels mode.

The bandwidth is 10 MHz.

BTS3702C BTS3702C WiMAX V300R003C01 provides the same system capacity as BTS3702C

WiMAX V300R002C00.

A maximum of two sector carriers can be configured.

Each BTS3702C serves a maximum of 256 active MSs, and supports a maximum of 300pairs of service flows when only one sector carrier is configured in PUSC with all

subchannels mode and the bandwidth is 10 MHz.


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Each BTS3702C serves a maximum of 150 active MSs, and supports a maximum of 150pairs of service flows for each sector carrier when two sector carriers are configured in

PUSC with all subchannels mode and the bandwidth is 10 MHz.

The DL peak throughput of one sector carrier reaches 31.41 Mbit/s with MIMO Matrix B

enabled, and the UL peak throughput of one sector carrier reaches 9 Mbit/s with ULCSM enabled



BTS3701B The BTS3701B supports only one sector carrier.

Each BTS3701B serves a maximum of 100 active MSs and supports a maximum of 100pairs of service flows in PUSC with all subchannels mode when the bandwidth is 10

MHz.

The DL peak throughput of one sector carrier reaches 31.41 Mbit/s with MIMO Matrix Benabled, and the UL peak throughput of one sector carrier reaches 9 Mbit/s with UL

CSM or SDMA enabled



1.1.2 Network Performance

Network performance is optimized as follows:

The use of DL enhanced fractional frequency reuse (EFFR), UL EFFR, and DL powercontrol balances interference across sectors, and increases sector throughput in

intra-frequency mode. Beamforming is introduced to increase DL throughput.

Loads and BE satisfaction are better balanced among carriers in multi-carrier mode.

UL SDMA improves base station (BS) spectral efficiency.

Interference detection and countermeasures are provided.

The SBC-REQ message handling process is optimized to expand UL network coverage.

UL 64QAM is introduced to increase UL throughput.

1.2 HardwareASN-GW

Huawei WASN9770 V300R003C02 is recommended. It can run on the NE40E and PacketGateway Platform (PGP).

BS

The hardware in DBS3900 WiMAX V300R003C01 is optimized as follows:

DBS3900 WiMAX V300R003C01 uses a new power board whose output power reaches

360 W.


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A new fan with a higher rotation speed is used, and the BBU heat dissipation reaches 650W.

The main control boards and baseband boards can be upgraded to support Long Term

Evolution (LTE) time division duplex (TDD) systems without replacing any of the

hardware. Each RRU3232 supports three carriers in 4T4R mode, and the output power over each

antenna port is 20 W. The software can be upgraded to support a WiMAX- LTE TDDdual-mode system or an LTE TDD system. WiMAX is short for WorldwideInteroperability for Microwave Access.

The following power cabinets can be used:

Indoor power cabinet TP48300/A

Enhanced outdoor power cabinet APM30

M2000

There is no impact on the M2000.

1.3 Implementation

Table 1-1 lists the network element (NE) upgrade paths.

Table 1-1NE upgrade paths

NE Upgrade PathDBS3900 The following versions can be directly upgraded to V300R003C01:

V300R002C03

V300R003C00

The following versions must be upgraded to V300R002C03 or

V300R003C00 and then to V300R003C01:

V300R002C01

V300R002C02

BTS3702C BTS3702C WiMAX V300R002C00 can be directly upgraded to

V300R003C01.

BTS3701B BTS3701B WiMAX V300R003C01 is the first official release, and

therefore no upgrade is required.

M2000 The following M2000 versions must be upgraded to

V200R011C01:

V200R009C00

V200R010C00

After an upgrade, the M2000 can manage BSs in the versions earlier than V300R003C01.

BSs in V300R003C01 and an earlier version can be connected to the same access service

network gateway (ASN-GW) and M2000.


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The M2000, ASN-GW, and BS must be upgraded in sequence.

1.4 LicenseTable 1-2 lists new license control items in V300R003C01.

Table 1-2New license control items in V300R003C01

License Control Item DescriptionBeamforming software Controls the beamforming function.

UL enhancement software Controls the UL 64QAM function.

RET antennas software Controls the RET antenna function.

RRU3232 power Required only when RRU3232 transmit

power exceeds 40 W. Each license allows a

20 W increase of RRU3232 transmit power.

Operation and maintenance data interface

packageControls interference detection.

Functions under license control can be enabled only after the dedicated license control item is

purchased.Table 1-3 describes the license control items for functions in V300R003C01.

Table 1-3License control items for functions in V300R003C01

Function License Control ItemUL SDMA UL enhancement software package

Air interface synchronization clock

systemEnhanced synchronization software package

1.5 Interfaces

1.5.1 Inter-NE Interfaces

In V300R002C03, the R6 interface complies with the NWG R1.0 or R1.2. In V300R003C01,

the R6 interface complies with the NWG R1.0, R1.2, or R1.3.

The R1 interface between the BS and the subscriber station (SS) or mobile station (MS) isspecified in the IEEE 802.16e-2005 Cor2D3 and DRAFT-T23-004-R010v02-B_SRD standard.

Some features over the air interface require the support of the MS. For details, see chapter3

"Impacts of V300R003C01 Functions on V300R002C03."

Table 1-4 describes the functions that have impacts on R1 and R6 interfaces.


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Table 1-4Functions that have impacts on R1 and R6 interfaces

Interface NE Protocol FunctionsR6

interface

BS and

ASN-GW

NWG R1.2 and

NWG R1.3

R6 interoperability based on the

NWG R1.2 or NWG R1.3

R1 BS -SS/MS IEEE 802.16e- Enhanced multi-carrier loadbalancing

UL EFFR

UL SDMA

Interference countermeasures

DL power control

HARQ category 5 and category 6

UL 64QAM

Enhanced assignment

1.5.2 Man-Machine Interfaces

Table 1-5 describes the changes to the man-machine interfaces in V300R003C01 when

compared with V300R002C03.

Table 1-5Impacts of functions on BS man-machine interfaces

Item ImpactMan-machinelanguage(MML)

commands

MML commands are optimized to meet Huawei SingleRANrequirements. This facilitates the future evolution from a single-modeBS into a multi-mode base station.

MML commands and parameter settings are optimized based on feature

types.

MML commands used in internal tests are removed, and the commandexecution window is more user-friendly.

The number of carrier-level parameters is reduced.

The managed object LGCPORTin the transmission configuration is

replaced with RSCGRP.

The SBTparameter is added to the following managed objects: EthTrunkLink

OMCh

CFMMEP

MPGroup

E1T1LoopPara

BFDSession

EthOAM3AH

PingFilter

EthTrunk


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Item Impact PPPLink

MPLink

DevIP EthPort

IPRoute

Some MML commands are added or modified to support new

functions.

Alarms Alarms are optimized to meet Huawei SingleRAN requirements,

facilitating the future evolution from a single-mode base station into a

multi-mode base station.

Alarm correlation is optimized by removing redundant and invalidalarms.

Alarms related to bidirectional forwarding detection (BFD) anddual-mode systems are used.

Engineering state alarms are supported.

Performance

measurement

The function subset Feature Performance Testis added.

Performance counters are added to support new functions.

The location parameter SubboardTypeis added to function subsets

EthPort, E1T1, PPP, and MPGRP.

The function subset LGCPORTis replaced with RSCGRP.

The following location parameters are added to RSCGRP:

BearType

SubboardType

PhyPortType

PhyPortNo

RscGrp

RscGrpNo

Invalid measurement items are removed.

Web LMT The graphical user interface (GUI) is optimized.

Engineering quality self-check is added.

Alarms and events are displayed separately in the alarm window.

WCS Wizard-based site deployment, clone-based site deployment, and

capacity expansion are supported.

Batch adjustment and cold parameter modification notification areadded.

Regular configuration checks are added.

WiMAX configuration system (WCS) deployment and capacity

expansion wizards are updated.

NHC The following check items are added:

R6 link status check

Key indicators related to remote electrical tilt (RET) antennas


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Item Impact Air interface clock synchronization between the BTS3701B and

neighboring cells

Unidirectional configurations of neighboring cells

Network health check reports can be compared.

Logs Customized call history record (CHR) is added.

1.6 Operation and MaintenanceTable 1-6 describes new operation and maintenance functions in V300R003C01.

Table 1-6New operation and maintenance functions in V300R003C01

Function DescriptionCustomized CHR Customized CHR helps you resolve subscriber complaints and

analyze MS faults. Upon receiving subscriber complaints, you can

collect customized CHR logs, and analyze subscriber callinformation according to the structure field documentation provided

by Huawei.

MS information

query optimized

The following parameters are added to the DSP ALLMSINFO

command:

ULPERNI

DLDATARATE

ULDATARATE

You can run this command to query MS signal quality in real time.

Trial license A trial license enables you to use a function for free for a trial

period, and helps you decide whether to purchase the function. Atrial license does not affect other functions for which licenses have

been purchased. The default trial period is three months.


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Function DescriptionWCS In V300R003C01, you can preset the time for a golden check. The

system automatically checks benchmark parameters as scheduled.

Template-based and clone-based site deployment wizards areadded.

Neighboring cell parameters and radio parameters can be modifiedin batches on the WCS.

A notification message is displayed when you attempt to modify a

cold parameter. After a cold parameter is modified, you mustblock carriers to make for modification to take effect.

A site capacity expansion wizard is added to facilitate capacityexpansion.

Access to BS configuration data is controlled. After the M2000 is

upgraded, existing permissions to access BS configuration data

are revoked by default. Soft-commissioning tasks and DHCP data are automatically

created when site deployment configuration scripts are generated.

The M2000 provides a northbound interface for BTS

configuration data, which is required for site deployment.

Tracing items

configurable on theCIT or UIT window

In V300R003C01, you can view parameters in real time in the CIT

or UIT window.

Jitter informationcollection and

graphical display

You can collect network latency and jitter information based on theIEEE P1588 protocol and view collected information in real time on

the GUI.Only the BTS3702C and BTS3701B support this function.

Alarm correlation This function decreases the number of alarms that are reported. It

also enables you to identify the root causes of alarms, which

facilitates alarm clearance.

Control over

LMT-based manual

alarm clearance

You can run an MML command to disable LMT-based manual

alarm clearance. This prevents site engineers from manually

clearing these alarms.

UL interference

stimulation

To simulate UL interference caused when a large number of MSs

enter neighboring cells, you can generate interference noises on the

BS UL channel by running an MML command.This function is used to test and assess network performance when

interference occurs on the UL.

Engineering quality

self-check

The Web LMT provides the engineering quality self-check as a

routine health check item. This self-check consists of subitems

related to engineering quality, including global positioning system(GPS) satellite locking, antenna standing-wave ratio (SWR), and

optical port power. The check results indicate whether a BS passes

the check and also contain check criteria and related MMLcommand execution results. This facilitates fault analysis and

location.


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Function DescriptionEnhanced software

upgrade

You can upgrade BS software and install cold and hot patches

simultaneously on the M2000.

BS software packages are compressed more efficiently. As aresult, downloaded and activated more quickly.

BS BootROM software can be upgraded automatically during aBS upgrade.

Version rollback can be performed if necessary after a hot patch is

installed.

In addition to CPU hot patches, secondary core hot patches and

DSP hot patches can be installed on a BS.

RRU3701s do not support hot patches.

Network

management system

(NMS) sharing in aWiMAX-LTE

system

DBS3900 WiMAX V300R003C01 shares the same BBU with the

LTE TDD system. You can use the following M2000 functions to

manage and maintain a WiMAX-LTE system:

Alarm management: Alarms are reported if configurationsconflict. The M2000 manages common alarms.

Device panel: The device panel displays all multi-mode base

station (MBTS) devices.

Topology management: The M2000 can display whether the BSand eNodeB are bound.

Binding relationship check: The M2000 can check whether the BS

and eNodeB are bound.

Base station binding: The M2000 automatically binds the BS andeNodeB if the check results indicate that they are not bound.

Version matching check: The M2000 checks whether the BS

version and the eNodeB version match before an upgrade is

performed. The upgrade is performed only when the versionsmatch.

1.7 Other NEs

Table 1-7 lists the impacts of V300R003C01 on other V300R002C03 NEs. For details, seechapter3 "Impacts of V300R003C01 Functions on V300R002C03."

Table 1-7Impacts of new functions on NEs in V300R003C00

Function SS/MS DBS3900 BTS3702C BTS3701B GW

Enhanced multi-carrier

load balancingYes Yes Yes No No

UL EFFR Yes Yes Yes Yes No

DL EFFR No Yes Yes Yes No


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Function SS/MS DBS3900 BTS3702C BTS3701B GW

UL SDMA Yes Yes No Yes No

Interference

Countermeasures

Yes Yes Yes Yes No

DL Power Control Yes Yes No No No

Modulation and coding

scheme (MCS) levelselection optimization

when interference rejectioncombining (IRC) isenabled

No Yes No Yes No

UL SBC-REQ coverage

optimizationYes Yes Yes Yes No

Air interface

synchronization clock

system

No No No Yes No

HARQ category 5 and

category 6Yes Yes Yes Yes No

Beamforming No Yes No No No

UL 64QAM Yes Yes Yes Yes No

Enhanced assignment Yes Yes Yes Yes No

Inter-user QoS No Yes Yes Yes Yes

Power saving scheduling No Yes Yes Yes No

R6 interoperability based

on the NWG R1.2 or R1.3No Yes Yes Yes Yes

In the SS/MSand ASN-GWcolumns, Noindicates that new function does not have impacton SSs, MSs, or ASN-GWs because they are not involved in new functions. In the DBS3900,

BTS3702C, BTS3701Bcolumns, Noindicates that new function does not have impact onDBS3900s, BTS3702Cs, BTS3701Bs because they do not support new functions.

1.8 Other Features

For details, see chapter3 "Impacts of V300R003C01 Functions on V300R002C03."


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Network Impact Report (Compared with V300R002C03) 2 Summary of Function Impacts



11

2 Summary of Function ImpactsThis chapter describes the impacts of new and enhanced functions, and provides the mappingbetween the functions and the features in the feature list.

Table 2-1 lists the impacts of functions on the system.

Table 2-1Impacts of functions on the system

Feature ID Feature Name Function Basic orOptional New orEnhanced Impact

WBFD-00800

5001Load Balancing Enhanced multi-carrier

load balancingBasic Enhanced Minor

WBFD-01200

5001

UL EFFR

NetworkingUL EFFR Basic Enhanced Major

WBFD-10100

1001

DL PUSC+PUSC

with All SC FFR

Networking

DL EFFR Basic Enhanced Minor

WBFD-15000

4001UL SDMA UL SDMA Basic New Minor

WBFD-01602

0001

Network TDD

Interference

Detection

Interference

countermeasuresBasic New Minor

WBFD-01200

7001

DL Power Control DL power control Basic New Minor

WBFD-00201

2001

Two-Antenna UL

Diversity Receiving

MCS level selection

optimized when IRC isenabled

Basic Enhanced Major

WBFD-019001001

Four-Antenna ULDiversity Receiving

WBFD-010001001

AMC

WBFD-00600

4001

Access

Enhancement in

RNG and SBC

UL SBC-REQ

coverage optimizedBasic Enhanced Minor


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Network Impact Report (Compared with V300R002C03) 2 Summary of Function Impacts



12

Feature ID Feature Name Function Basic orOptional New orEnhanced Impact

WBFD-17000

2001

Air Interface

SynchronizationClock System

Air interface

synchronization clocksystem

Basic Enhanced Minor

WBFD-01100

1001CC-HARQ HARQ category 5 and

category 6Basic Enhanced Minor

WBFD-14000

1001Beamforming Beamforming

optimizedBasic Enhanced Minor

WBFD-15000

2001UL 64QAM UL 64QAM Optional New Minor

WBFD-00800

5001Load Balancing Enhanced assignment Basic Enhanced Minor

WBFD-007009001

Inter-User QoS Inter-user QoS Basic Enhanced Minor

WBFD-010009001

Power SavingScheduling

Power savingscheduling

Basic New Minor

NA NA R6 interoperabilitybased on the NWGR1.2 or NWG R1.3

Basic New Major

InTable 2-1,the impacts are classified as Minorand Major. A function has major impacts onthe system when it meets the following requirements:

It is supported by all MSs or ASN-GWs in the network.

It requires hardware replacement.

The processing procedure is fundamentally changed.

Other impacts are classified as Minor.

For details, see chapter3 "Impacts of V300R003C01 Functions on V300R002C03."


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Network Impact Report (Compared with V300R002C03) 3 Impacts of V300R003C01 Functions on V300R002C03



13

3 Impacts of V300R003C01 Functions onV300R002C03

3.1 Enhanced Multi-Carrier Load Balancing

3.1.1 Description

Multi-carrier load balancing is supported in versions earlier than V300R003C01. In

V300R003C01, due to the differences of network coverage between carriers, this function is

optimized as follows:

Load balancing handovers from an outer carrier to an inner carrier are supported. The

thresholds for starting and stopping this type of handover are lower than those forstarting and stopping the original load balancing handovers. MSs are highly likely to

enter the network over an outer carrier with optimal signal quality. If this happens, theouter carrier load is heavy. This function decreases the load on the outer carrier, andimproves the network entry success rate.

The existing algorithms for load balancing handovers and BE satisfaction balancing

handovers are optimized. Now, cell edge MSs can be handed over to neighboring sectorsand central MSs to other carriers in the same sector.

The algorithm optimization ensures that load balancing handovers are performed in a

timely manner. It also improves the handover success rate and balances loads and BEsatisfaction across carriers on a multi-carrier network.

3.1.2 Capacity and Performance

System Capacity

Enhanced multi-carrier load balancing ensures that loads and BE satisfaction are balanced

among carriers on a multi-carrier network, and BSs can serve more MSs and carry more

service flows as a result as well.

Network Performance

The possibility of BS overloads decreases, and the network entry success rate increases.


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3.1.3 Hardware

The BTS3701B and RRU3701 do not support enhanced multi-carrier load balancing and BE

satisfaction balancing, because they do not support multi-carrier configurations.


There is no impact on inter-NE interfaces.

3.1.5 Operation and Maintenance

Data Configuration

Table 3-1 describes the modified MML commands.

Table 3-1Modified MML commands

MML Command Description

ADD CARRIERBASICINFO

MOD CARRIERBASICINFO

The MULTICARRIERINDparameter is added.

Configure carriers with high signal quality as outer carriers andcarriers with low signal quality as inner carriers on amulti-carrier network.

MOD LOADCTRLPARA The following parameters are added:

CENTRALUSERDLMPRTHESH

LOADHORESVDLOADTHESH

LOADHOSCANDELTATHESH

OTILOADHOSTARTTHESH

OTILOADHOSTOPTHESH

Performance Counters

Table 3-2 describes the new performance counters related to enhanced multi-carrier load

balancing.

Table 3-2New performance counters related to enhanced multi-carrier load balancing

Performance Counter DescriptionNumber of Handovers

Triggered by UL Load

Balancing

Number of handovers triggered by uplink load balancing

within a measurement period. This counter is used to evaluate

how frequently balancing handovers are triggered by uplinkload balancing.

Number of Handovers

Triggered by DL Load

Balancing

Number of handovers triggered by downlink load balancing

within a measurement period. This counter is used to evaluate

how frequently balancing handovers are triggered by

downlink load balancing.


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Performance Counter DescriptionNumber of Balancing

Handovers Triggered byUL BE Satisfaction

Number of balancing handovers triggered by uplink BE

satisfaction within a measurement period. This counter isused to evaluate how frequently balancing handovers are

triggered by uplink BE satisfaction.

Number of Balancing

Handovers Triggered byDL BE Satisfaction

Number of balancing handovers triggered by downlink BE

satisfaction within a measurement period. This counter isused to evaluate how frequently balancing handovers are

triggered by downlink BE satisfaction.

Number of MSs for

Handover Scanning

Triggered by Load

Number of MSs that perform scanning after handovers are

triggered by load within a measurement period. This counter

is used to calculate the percentage of MSs that can be handedover after balancing handovers are triggered by load.

Number of MSs Scanned

for Balancing HandoverTriggered by BE

Satisfaction

Number of MSs that perform scanning after the balancing

handover is triggered by BE satisfaction within ameasurement period. This counter is used to calculate the

percentage of MSs that can be handed over after balancinghandovers are triggered by BE satisfaction.

Number of Balancing

Handover Requests

Number of balancing handover requests within a

measurement period. This counter is used to calculate thepercentage of MSs that can be handed over after balancinghandovers are triggered by BE satisfaction or load.

Number of HandoverRequests Triggered by ULSignal Quality

Number of balancing handover requests triggered by uplinksignal quality within a measurement period. This counter isused to calculate the percentage of MSs that can be handed

over after balancing handovers are triggered by uplink signal

quality.

Fault Management

There is no impact on fault management.

3.1.6 Other NEs

MSs that support BS-initiated handovers must be used.

3.1.7 Other Features

There is no impact on other features.

3.2 UL EFFR

3.2.1 Description

UL EFFR is a fractional frequency reuse (FFR) technology used in the frequency domain. Itensures that the frequency reuse coefficient for the edge band is close to 3, and allows MSs at


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the central band to use all of the frequency resources. This expands network coverage andimproves sector capacity.

In V300C003C00, UL EFFR without extended bands was introduced.

In V300R003C01, UL EFFR allows the use of the extended band.In V300R003C01, the first zone in a UL subframe is a PUSC with all subchannels zone. It is

divided into a UL common band and a UL extended band. The UL common band occupies thesame sub-band as the edge band in the second zone, and the extended band occupies the same

sub-band as the central band in the second zone. MSs can be scheduled for the extended band

to improve UL spectral efficiency.

Figure 3-1Figure 3-1 shows UL EFFR that uses extended bands.

Figure 3-1UL EFFR that uses extended bands


System Capacity

BS UL throughput increases.

Network Performance

Scheduling MSs for the extended band increases interference on UL common bands inneighboring sectors at the same frequency band, but does not affect ranging check, channel

quality indication channel (CQICH) performance, and acknowledgment (ACK) channel

performance.

3.2.3 Hardware

There is no impact on hardware.




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Data Configuration

The following MML commands are added:

MOD ULEFFRPARA

LST ULEFFRPARA


Table 3-3 describes the new performance counters related to UL EFFR.

Table 3-3New performance counters related to UL EFFR

Performance Counter DescriptionNumber of Slots at Center

BandTotal number of slots occupied by the center band.

Number of Slots at Border

BandTotal number of slots occupied by the border band.

Number of Slots Allocated

to Center User by CenterBand

Number of slots allocated to the user by the center band,

including wasted resources caused by lengthened bursts.


to Border User by Border

Band

Number of slots allocated to the border user by the border

band, including wasted resources caused by lengthened

bursts.


to Center User by Border

Band

Number of slots allocated to center user bursts by the

border band, including wasted resources caused by

lengthened bursts.

Rate of Occupied Slots at

Center Band

Ratio of the number of slots allocated to the center band

user to the total number of slots allocated by the BS to thecenter band.

Rate of Slots Occupied by

Border User at Border Band

Ratio of the number of slots allocated to the border band

user to the total number of slots allocated by the BS to theborder band.

Rate of Slots Occupied byCenter User at Border Band

Proportion of border band slots allocated to the center userto measure the actual allocation.

Average Number of Users at

Center Band

Average number of users at the center band within a

measurement period.

Average Number of Users at

Border Band

Average number of users at the border band within a

measurement period.

Traffic of User at Center

Band

Total data received by the user at the center band, including

the traffic obtained from border band but not including

padding and dropped bytes, within a measurement period.


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Performance Counter DescriptionTraffic of User at Border

Band

Total data received by the user at the border band, not

including padding and dropped bytes, within ameasurement period.

Average Throughput atCenter Band

Average throughput at the center band on a carrier within ameasurement period.

Average Throughput at

Border Band

Average throughput at the border band on a carrier within a

measurement period.

Times of DL Measurement

CINR Difference BetweenReuse1 and Reuse3 Not

Higher Than 5dB

CINR of Reuse1 and that of Reuse3 are compared on the

BS. If the CINR difference between Resue1 and Reuse3 issmall, it indicates that the interference signals received by

the MS are weak. If there is a big difference, it indicatesthat the interference signals are strong. This measurement

counter is used to count the times when the CINR

difference is not higher than 5 dB.


CINR Difference BetweenReuse1 and Reuse3 Higher

Than 5dB and Not Higher

Than 6dB



the MS are weak. If there is a big difference, it indicates

that the interference signals are strong. This measurementcounter is used to count the times when the CINRdifference is above 5 dB but not higher than 6 dB.

Times of DL MeasurementCINR Difference BetweenReuse1 and Reuse3 Higher

Than 6dB and Not Higher

Than 7dB

CINR of Reuse1 and that of Reuse3 are compared on theBS. If the CINR difference between Resue1 and Reuse3 issmall, it indicates that the interference signals received by

the MS are weak. If there is a big difference, it indicates

that the interference signals are strong. This measurementcounter is used to count the times when the CINR

difference is above 6 dB but not higher than 7 dB.


CINR Difference Between

Reuse1 and Reuse3 HigherThan 7dB and Not Higher

Than 8dB


BS. If the CINR difference between Resue1 and Reuse3 is

small, it indicates that the interference signals received bythe MS are weak. If there is a big difference, it indicates

that the interference signals are strong. This measurementcounter is used to count the times when the CINRdifference is above 7 dB but not higher than 8 dB.

Times of DL MeasurementCINR Difference Between

Reuse1 and Reuse3 Higher

Than 8dB and Not HigherThan 9dB

CINR of Reuse1 and that of Reuse3 are compared on theBS. If the CINR difference between Resue1 and Reuse3 is

small, it indicates that the interference signals received by


counter is used to count the times when the CINRdifference is above 8 dB but not higher than 9 dB.


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Performance Counter DescriptionTimes of DL Measurement

CINR Difference BetweenReuse1 and Reuse3 Higher

Than 9dB




counter is used to count the times when the CINRdifference is higher than 9 dB.

Times of Path Loss Not

Lower Than 130dB

Times of path loss not lower than 130 dB within a

measurement period.

Times of Path Loss Lower

Than 130dB and Not LowerThan 120dB

Times of path loss lower than 130 dB but not lower than

120 dB within a measurement period.



Times of path loss lower than 120 dB and but lower than



Than 110dB and Not Lower

Than 100dB

Times of path loss lower than 110 dB but not lower than




Than 90dB

Times of path loss lower than 100 dB and but lower than 90

dB within a measurement period.



Than 80dB








Than 70dB

Times of path loss lower than 70 dB within a measurement

period.

Number of Occupied Slots atExtended Band on the

Uplink

Number of slots used in the uplink extension band within ameasurement period. This counter is used to evaluate the

possibility of enabling the uplink extension band and

resource usage in the uplink extension band.

Number of Extended Band

Slots on the Uplink

Total number of slots used in the uplink extension band

within a measurement period. This counter is used toevaluate the possibility of enabling the uplink extensionband and resource usage in the uplink extension band.

Throughput of Extended

Band on the Uplink

Throughput in the uplink extension band within a

measurement period. This counter is used to calculate theaverage throughput in the extension band.


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Performance Counter DescriptionTotal Number of Packets

Received by Extended Bandon the Uplink

Total number of packets received in the uplink extension

band within a measurement period. This counter is used tocalculate the error packet rate in the extension band.

Number of Error Packets

Received by Extended Bandon the Uplink

Total number of error packets received in the uplink

extension band within a measurement period. This counteris used to calculate the error packet rate in the extension

band.

Number of Successful MSHandovers from Edge Band

to Center Band on theUplink

Number of successful MS handovers from uplink edgeband to uplink center band within a measurement period.

This counter is used to evaluate how frequently the MShandovers from edge band to center band and calculate the

success rate of the handover.

Number of Failures in MSHandovers from Edge Band

to Center Band on theUplink

Number of unsuccessful MS handovers from uplink edgeband to uplink center band within a measurement period.

This counter is used to evaluate how frequently the MShandovers from edge band to center band and calculate the


Number of Successful MS

Handovers from Center

Band to Edge Band on theUplink

Number of successful MS handovers from uplink center

band to uplink edge band within a measurement period.

This counter is used to evaluate how frequently the MShandovers from center band to edge band and calculate thesuccess rate of the handover.

Number of Failures in MS

Handovers from CenterBand to Edge Band on theUplink

Number of unsuccessful MS handovers from uplink center

band to uplink edge band within a measurement period.This counter is used to evaluate how frequently the MShandovers from center band to edge band and calculate the


NI of Extended Band Average noise index (NI) in the extension band within a

measurement period. This counter is used to evaluate the

average interference level in the extension band.

NI of Center Band Average NI in the center band within a measurement

period. This counter is used to evaluate the averageinterference level in the center band.

NI of Edge Band Average NI in the edge band within a measurement period.This counter is used to evaluate the average interferencelevel and channel quality in the edge band.

NI-Based Interference

Density (Edge Band)

Interference density based on the NI in the edge band

within a measurement period. This counter is used to

calculate the ratio of interference duration to the

measurement period.


Intensity (Edge Band)

Average value of edge band NI that exceeds the threshold

(119 dBm) within a measurement period. This counter isused to evaluate the average interference level in the edge

band.


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Performance Counter DescriptionNI of Common Region Average NI in the uplink common zone within a

measurement period. This counter is used to evaluate theaverage interference level in the uplink common zone and

channel quality in the common zone.


Density (Common Region)

Interference density based on the NI in the common zone

within a measurement period. This counter is used tocalculate the ratio of interference duration to the

measurement period.


Intensity (Common Region)

Average value in the common zone NI that exceeds the

threshold (119 dBm) within a measurement period. This

counter is used to evaluate the interference level in thecommon zone.

Average Load of the UL

Center Band

Average load in the uplink center band within a

measurement period. This counter is used to evaluate thecongestion level in the uplink center band.

Number of SDMA

Decisions for MSs on the

Border

Total number of decisions on whether to enable SDMA for

cell edge MSs within a measurement period. This counter is

used to calculate the total number of SDMA decisions due

to the changes in the modulation and coding scheme (MCS)for cell edge MSs that support SDMA.

Number of Times SDMA Is

Enabled for MSs on theBorder

Number of times SDMA is enabled for cell edge MSs

within a measurement period. This counter is used tocalculate the number of times that the uplinkcarrier-to-interference-and-noise ratio (CINR) of cell edge

MSs reaches the SDMA NI threshold.

Number of Slots Used forSDMA Partnership at the

Edge Band

Number of slots available for SDMA multiplexing for MSsin the edge band within a measurement period. This counter

is used to calculate the total number of slots that can beused for SDMA multiplexing for MSs in the edge band.

Number of Slots

Successfully Paired forSDMA-enabled Center

Users at the Edge Band

Number of slots used for SDMA multiplexing for center

MSs in the edge band within a measurement period. Thiscounter is used to calculate the number of slots successfully

used for SDMA multiplexing for center MSs in the edgeband.

Number of SlotsSuccessfully Paired forSDMA-enabled Edge Users

at the Edge Band

Number of slots used for SDMA multiplexing for cell edgeMSs in the edge band within a measurement period. Thiscounter is used to calculate the number of slots successfully

used for SDMA multiplexing for cell edge MSs in the edgeband.

Number of Bytes Used for

SDMA Partnership at theEdge Band

Number of bytes available for SDMA multiplexing for MSs

in the edge band within a measurement period. This counteris used to calculate the total number of bytes that can beused for SDMA multiplexing for MSs in the edge band.


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Performance Counter DescriptionNumber of Bytes

Successfully Paired forSDMA-enabled Center

Users at the Edge Band

Number of bytes used for SDMA multiplexing for center

MSs in the edge band within a measurement period. Thiscounter is used to calculate the number of bytes transmitted

in slots successfully used for SDMA multiplexing forcenter MSs in the edge band.

Number of Bytes

Successfully Paired for

SDMA-enabled Edge Users

at the Edge Band

Number of bytes used for SDMA multiplexing for cell edge

MSs in the edge band within a measurement period. This

counter indicates the number of bytes transmitted in slots

successfully used for SDMA multiplexing for cell edgeMSs in the edge band.

Fault Management


3.2.6 Other NEs

The MS must support the division of a UL subframe into two zones. If the first UL zone is a

PUSC with all subchannels zone, the MS must automatically identify and skip the common

band, or the MS allows the BS to specify the start of the extended band using OFDMAsymbol offsetand Subchannel offset in the UL Allocation Start IE or HARQ UL-MAP IE.


UL EFFR and UL CSM cannot be in the active state simultaneously, but UL EFFR and ULSDMA can.

3.3 DL EFFR

3.3.1 Description

DL EFFR is a key technology in intra-frequency networking mode. When DL EFFR is

enabled, sector coverage is close to that in PUSC with 1/3 subchannels mode, and

time-frequency resources are effectively used. This improves spectral efficiency.

Similar to DL FFR, DL EFFR divides a subframe into a PUSC with partial subchannels zoneand a PUSC with all subchannels zone. The PUSC with partial subchannels zone can be a

PUSC with 1/2 subchannels zone or a PUSC with 1/3 subchannels zone. The PUSC with all

subchannels zone has a fixed boundary, and all sectors are aligned along the boundary. Thisreduces interference between the edge areas of neighboring sectors.

In the PUSC with partial subchannels zone, subchannel power is high. Subchannels in PUSCwith partial subchannels zones in neighboring sectors do not overlap. This type of zone servescell edge MSs on the UL common channel.

In the PUSC with all subchannels zone, subchannel power is low. This type of zone serves

cell center MSs.Figure 3-2 shows the subframe structure.


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Figure 3-2Subframe structure

In V300R003C01, MSs are scheduled between zones to maximize modulation order productcode rates (MPRs) and improve BS spectral efficiency. MS scheduling between zones can be

triggered based on BE satisfaction to improve average BE satisfaction in a BS.

When DL EFFR is enabled, MS switches between beamforming mode and MIMOB+beamforming mode are optimized.


System Capacity

DL EFFR increases BS DL throughput.

Network Performance

DL EFFR improves BE subscriber experience.

3.3.3 Hardware

There is no impact on hardware.




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Data Configuration


MOD DLEFFRPARA

LST DLEFFRPARA

The following MML commands are removed:

MOD FFRPARA

LST FFRPARA

The meaning and value range of the DLZONEINDparameter are modified in the following

MML commands:

MOD CARRIERZONEINFO LST CARRIERZONEINFO


Table 3-4 describes the new performance counters related to DL EFFR.

Table 3-4New performance counters related to DL EFFR

Performance Counter Description

Number of Times MSs

Exit the Network Due toAir Link Failures in theDL PUSC All Zone

Number of times MSs exit the network due to air link failures

in the downlink PUSC All zone within a measurement period.This counter is used to analyze the network exit due to air linkfailures in multiple downlink zones.

Downlink PUSC Partial

Zone Mean Load

Average load in the downlink PUSC Partial zone on a carrier

within a measurement period. This counter is used to calculate

the load in the downlink PUSC Partial zone on a carrier.

Downlink PUSC All

Zone Mean Load

Average load in the downlink PUSC All zone on a carrier

within a measurement period. This counter is used to calculate

the load in the downlink PUSC All zone on a carrier.

Number of Satisfactory

BE Service Flows at theDL Partial Zone

Number of satisfactory BE service flows in the downlink

PUSC Partial zone within a measurement period. This counteris used to evaluate the BE satisfaction level in the downlinkPUSC Partial zone.

Total Number of BE

Service Flows at the DL

Partial Zone

Total number of BE service flows in the downlink PUSC

Partial zone within a measurement period. This counter is used

to evaluate the BE satisfaction level in the downlink PUSC

Partial zone.

BE Satisfaction at the DL

Partial Zone

Satisfaction level of BE service flows in the downlink PUSC

Partial zone within a measurement period. This counter is usedto evaluate user experience of services in the downlink PUSCPartial zone.


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Number of Satisfactory

BE Service Flows at theDL All Zone

Number of satisfactory BE service flows in the downlink

PUSC All zone within a measurement period. This counter isused to evaluate BE satisfaction level in the downlink PUSC

All zone.

Total Number of BE

Service Flows at the DLAll Zone

Total number of BE service flows in the downlink PUSC All

zone within a measurement period. This counter is used toevaluate BE satisfaction level in the downlink PUSC All zone.

BE Satisfaction at the DL

All Zone

Satisfaction level of BE service flows in the downlink PUSC

All zone within a measurement period. This counter is used toevaluate user experience of services in the downlink PUSC All

zone.

Fault Management


3.3.6 Other NEs

There is no impact on other NEs.


There is no impact on other features.

3.4 UL SDMA

3.4.1 Description

When UL SDMA is enabled, the spatial multiplexing technology allows multiple MSs to use

the same UL time-frequency resources. This increases UL throughput over the air interface.

The BS allows single-transmit-antenna MSs to use SDMA in the UL PUSC zone. The BS

selects the MSs based on the measurement results on the physical layer (PHY) and the

information reported by the MSs.

SDMA gain is obtained by multiplexing UL time-frequency resources, as shown inFigure3-3.


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Figure 3-3UL SDMA gain principle

As shown inFigure 3-3,Layer 1 and Layer 2 belong to the same time-frequency resource set,the amount of resources occupied by MS 1 and MS 2 are equal to that of resources occupiedby MS 3. The pilot structure of MS 1 and MS 2 does not overlap with that of MS 3, and the

BS demodulates data sent from two MSs based on the pilot structure. This increases ULthroughput.


System Capacity

UL SDMA increases BS average UL throughput and cell edge MS throughput.

Network Performance

There is no impact on network performance.

3.4.3 HardwareThere is no impact on hardware.




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Data Configuration

The following parameters are added to the MOD MIMOPARAand LST MIMOPARAcommands:

ULVIRTUALMIMOMODE

SDMAENTHDOFFSET

SDMADISTHDOFFSET


Table 3-5 describes the new performance counters related to UL SDMA.

Table 3-5New performance counters related to UL SDMAPerformance Counter Description

Number of Decisions on

Whether to Enable UL SDMA

Number of decisions on whether to enable uplink SDMA


calculate the possibility of enabling SDMA.

Number of Times UL SDMA

Is Enabled

Number of times uplink SDMA is enabled within a

measurement period. This counter is used to calculate thepossibility of enabling SDMA.

Number of Slots Used forPartnership Between UL

SDMA MSs

Number of slots available for uplink SDMAmultiplexing within a measurement period. This counter

is used to calculate the MS matching success rate.


Partnership Between UL

SDMA MSs

Number of bytes available for uplink SDMA

multiplexing within a measurement period. This counter

is used to calculate the MS matching efficiency.

Number of Slots Used for

Successful Partnership

Between UL SDMA MSs

Number of slots used for uplink SDMA multiplexing


calculate the MS matching success rate.


Successful PartnershipBetween UL SDMA MSs

Number of bytes used for uplink SDMA multiplexing

within a measurement period. This counter is used tocalculate the MS matching efficiency.

Fault Management


3.4.6 Other NEs

MSs that support CSM negotiation and HARQ must be used.


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MSs do not support interference rejection combining (IRC) demodulation when using

UL SDMA to enter the network.

UL SDMA is incompatible with UL repetition coding. UL SDMA is incompatible with UL 64QAM 5/6 in the DBS3900.

UL SDMA is incompatible with UL 64QAM 3/4 and 64QAM 5/6 in the BTS3701B.

3.5 Interference Countermeasures

3.5.1 Description

TDD interference occurs between two distant BSs when the latency exceeds the transmit

transition gap (TTG).To prevent TDD interference, Interference countermeasures are introduced and BSs performthe following operations:

1. Measures the NI of the UL common band to detect interference

2. Reports an alarm if interference is detected

3. Scans the preamble to locate interference sources

4. Reserves the last symbols of the DL frame to cancel interference between BSs, orconfigures a safety zone in the front of the UL common band to prevent interference


System Capacity

There is no impact on system capacity.

Network Performance

Interference countermeasures decrease the call drop rate.

3.5.3 Hardware

8HP BBIs do not support DL symbol reservation.

BTS3701Bs do not support preamble scanning.




Data Configuration



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MOD ANTIINTERFERE

STR PREAMBLESCAN

STP PREAMBLESCAN

DSP PREAMBLESCAN


Table 3-6 describes the new performance counters related to interference countermeasures.

Table 3-6New performance counters related to interference countermeasures


Documents

Wimax Network Impact Report v3r2c03