Wimax Network Impact Report v3r3c00

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WiMAX BTS

V300R003C01

Network Impact Report(Compared with V300R003C00)

Issue Draft A

Date 2011-07-15

HUAWEI TECHNOLOGIES CO., LTD.



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

Copyright © Huawei Technologies Co., Ltd

ii

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WiMAX BTS V300R003C01

Network Impact Report (Compared with V300R003C00) About This Document



ii

About This Document

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

V300R003C00. It is useful 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.




Network Impact Report (Compared with V300R003C00) Contents



iii

Contents

About This Document .................................................................................................................... ii 1 Overview ......................................................................................................................................... 1

1.1 Capacity and Performance ............................................................................................................................... 1 1.1.1 System Capacity .............................................................. ................................................................. ....... 1 1.1.2 Network Performance ..................................................................................... ........................................ 2

1.2 Hardware ............................................................ ................................................................. ............................. 2 1.3 Implementation ................................................................................................................................................ 3 1.4 License ............................................................................................................................................................. 4 1.5 Interfaces ............................................................ ................................................................. ............................. 4

1.5.1 Inter-NE Interfaces .......................................................... .............................................................. .......... 4 1.5.2 Man-Machine Interfaces ...................................................................... ................................................... 5

1.6 Operation and Maintenance ............................................................................................................................. 6 1.7 Other NEs ........................................................... ................................................................. ............................. 8 1.8 Other Features ............................................................................................... ................................................... 9

2 Summary of Function Impacts ................................................................................................. 10 3 Impacts of V300R003C01 Functions on V300R003C00 ......................................................... 12

3.1 Enhanced Multi-Carrier Load Balancing ....................................................................................................... 12 3.1.1 Description ........................................................... ................................................................. ................ 12 3.1.2 Capacity and Performance ................................................................... ................................................. 12 3.1.3 Hardware .............................................................. ................................................................. ................ 13 3.1.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 13 3.1.5 Operation and Maintenance ................................................................. ................................................. 13

3.1.6 Other NEs ............................................................................................................................................. 14 3.1.7 Other Features ............................................................................................................ ........................... 14

3.2 UL EFFR ............................................................ ................................................................. ........................... 15 3.2.1 Description ........................................................... ................................................................. ................ 15 3.2.2 Capacity and Performance ................................................................... ................................................. 15 3.2.3 Hardware .............................................................. ................................................................. ................ 15 3.2.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 16 3.2.5 Operation and Maintenance ................................................................. ................................................. 16 3.2.6 Other NEs ............................................................................................................................................. 19 3.2.7 Other Features ............................................................................................................ ........................... 19







iv

3.3 DL EFFR ............................................................ ................................................................. ........................... 19 3.3.1 Description ........................................................... ................................................................. ................ 19 3.3.2 Capacity and Performance ................................................................... ................................................. 20 3.3.3 Hardware .............................................................. ................................................................. ................ 20 3.3.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 20 3.3.5 Operation and Maintenance ................................................................. ................................................. 21 3.3.6 Other NEs ............................................................................................................................................. 22 3.3.7 Other Features ............................................................................................................ ........................... 22

3.4 UL SDMA .......................................................... ................................................................. ........................... 22 3.4.1 Description ........................................................... ................................................................. ................ 22 3.4.2 Capacity and Performance ................................................................... ................................................. 23 3.4.3 Hardware .............................................................. ................................................................. ................ 23 3.4.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 23 3.4.5 Operation and Maintenance ................................................................. ................................................. 24 3.4.6 Other NEs ............................................................................................................................................. 24 3.4.7 Other Features ............................................................................................................ ........................... 25

3.5 Interference Countermeasures ............................................................. ........................................................... 25 3.5.1 Description ........................................................... ................................................................. ................ 25 3.5.2 Capacity and Performance ................................................................... ................................................. 25 3.5.3 Hardware .............................................................. ................................................................. ................ 25 3.5.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 25 3.5.5 Operation and Maintenance ................................................................. ................................................. 25 3.5.6 Other NEs ............................................................................................................................................. 26 3.5.7 Other Features ............................................................................................................ ........................... 26

3.6 DL Power Control ......................................................................................... ................................................. 27 3.6.1 Description ........................................................... ................................................................. ................ 27 3.6.2 Capacity and Performance ................................................................... ................................................. 27 3.6.3 Hardware .............................................................. ................................................................. ................ 27 3.6.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 27 3.6.5 Operation and Maintenance ................................................................. ................................................. 27 3.6.6 Other NEs ............................................................................................................................................. 28 3.6.7 Other Features ............................................................................................................ ........................... 28

3.7 MCS Level Selection Optimized When IRC Is Enabled ................................................................ ................ 28 3.7.1 Description ........................................................... ................................................................. ................ 28 3.7.2 Capacity and Performance ................................................................... ................................................. 29 3.7.3 Hardware .............................................................. ................................................................. ................ 29 3.7.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 29 3.7.5 Operation and Maintenance ................................................................. ................................................. 29 3.7.6 Other NEs ............................................................................................................................................. 30 3.7.7 Other Features ............................................................................................................ ........................... 30

3.8 UL SBC-REQ Coverage Optimized .............................................................. ................................................. 30 3.8.1 Description ........................................................... ................................................................. ................ 30







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3.8.2 Capacity and Performance ................................................................... ................................................. 30 3.8.3 Hardware .............................................................. ................................................................. ................ 31 3.8.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 31 3.8.5 Operation and Maintenance ................................................................. ................................................. 31 3.8.6 Other NEs ............................................................................................................................................. 31 3.8.7 Other Features ............................................................................................................ ........................... 32

3.9 Air Interface Synchronization Clock System ...................................................................... ........................... 32 3.9.1 Description ........................................................... ................................................................. ................ 32 3.9.2 Capacity and Performance ................................................................... ................................................. 32 3.9.3 Hardware .............................................................. ................................................................. ................ 32 3.9.4 Inter-NE Interfaces .......................................................... .............................................................. ........ 32 3.9.5 Operation and Maintenance ................................................................. ................................................. 32 3.9.6 Other NEs ............................................................................................................................................. 33 3.9.7 Other Features ............................................................................................................ ........................... 33

3.10 HARQ Category 5 and Category 6 .............................................................. ................................................. 33 3.10.1 Description ......................................................... ................................................................. ................ 33 3.10.2 Capacity and Performance ................................................................. ................................................. 33 3.10.3 Hardware ............................................................ ................................................................. ................ 33 3.10.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 33 3.10.5 Operation and Maintenance ............................................................... ................................................. 33 3.10.6 Other NEs............................................................................................................................................ 34 3.10.7 Other Features .......................................................................................................... ........................... 34

3.11 Beamforming Optimized ........................................................................................................... ................... 34 3.11.1 Description ......................................................... ................................................................. ................ 34 3.11.2 Capacity and Performance ................................................................. ................................................. 34 3.11.3 Hardware ............................................................ ................................................................. ................ 34 3.11.4 Inter-NE Interfaces ........................................................ .............................................................. ........ 34 3.11.5 Operation and Maintenance ............................................................... ................................................. 35 3.11.6 Other NEs ........................................................... ................................................................. ................ 49 3.11.7 Other Features .......................................................................................................... ........................... 49

A Terms ............................................................................................................................................ 50 B Acronyms and Abbreviations .................................................................................................. 51




Network Impact Report (Compared with V300R003C00) 1 Overview



1

1 Overview

1.1 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.

DBS3900 WiMAX V300R003C01 and V300R003C00 use the same BWA baseband

processing and radio interface unit version b (BBBIb). Each BBBIb serves a maximumof 200 active mobile stations (MSs) for each 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 pair of best effort (BE) service flows and theremaining 30% with one pair of BE service flows and one pair of extended real-time

polling service (ertPS) flows.

The long-term evolution baseband processing unit version c (LBBPc) has been added inDBS3900 WiMAX V300R003C01. Each LBBPc serves a maximum of 256 active MSs

for 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.

DBS3900 WiMAX V300R003C01 provides the same peak throughput as DBS3900

WiMAX V300R003C00. The downlink (DL) peak throughput of one sector carrier is31.41 Mbit/s with multiple-input multiple-output (MIMO) Matrix B enabled, and the

uplink (UL) peak throughput of one sector carrier is 9 Mbit/s with UL collaborative

spatial multiplexing (CSM) or space division multiple access (SDMA) enabled if thefollowing conditions are met:

− 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.







2

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

subchannels mode and the bandwidth is 10 MHz.

Each BTS3702C serves a maximum of 150 active MSs, and supports a maximum of 150

pairs of service flows for each sector carrier when two sector carriers are configured inPUSC 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 Benabled, and the UL peak throughput of one sector carrier reaches 9 Mbit/s with ULCSM enabled

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


BTS3701B The BTS3701B supports only one sector carrier.

Each BTS3701B serves a maximum of 100 active MSs and supports a maximum of 100 pairs 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 B

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

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


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 enable interference to distribute evenly across sectors, and increases sector

throughput in intra-frequency mode.

The beamforming function is more robust. This obtains stable performance gain.

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.

1.2 Hardware

ASN-GW

Huawei WASN9770 V300R003C02 is recommended. It can run on the NE40E and Packet

Gateway Platform (PGP).

BS

The hardware in DBS3900 WiMAX V300R003C01 is optimized as follows:







3

DBS3900 WiMAX V300R003C01 uses a new power board whose output power reaches360 W.

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

W.

The main control boards and baseband boards can be upgraded to support Long TermEvolution (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 Worldwide

Interoperability 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 1-1 NE upgrade paths

NE Upgrade Path

DBS3900 The following versions can be directly upgraded to V300R003C01:

V300R002C03

V300R003C00

The following versions must be upgraded to V300R002C03 orV300R003C00 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.







4

BSs in V300R003C01 and an earlier version can be connected to the same access servicenetwork gateway (ASN-GW) and M2000.

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

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

Table 1-2 New license control items in V300R003C01

License Control Item Description

RRU3232 power Required only when RRU3232 transmit power exceeds

40 W. Each license allows a 20 W increase ofRRU3232 transmit power.

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 1-3 License control items for functions in V300R003C01

Function License Control Item

UL SDMA UL enhancement software package

Air interface synchronization clock

systemEnhanced synchronization software package

Beamforming optimized Beamforming software package

1.5 Interfaces

1.5.1 Inter-NE InterfacesThe R6 interface between the BS and the ASN-GW complies with the Network WorkingGroup (NWG) R1.2 and NWG 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 chapter 3"Impacts of V300R003C01 Functions on V300R003C00."

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







5

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

Interface NE Protocol Functions

R6

interface

BS and ASN-GW NWG R1.2 and

NWG R1.3

None

R1interface

BS and SS or MS IEEE 802.16e Enhanced multi-carrier load balancing

UL EFFR

UL SDMA

Interference countermeasures

DL power control

HARQ category 5 and category 6

1.5.2 Man-Machine Interfaces

Table 1-5 describes the impacts of functions on BS man-machine interfaces.

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

Item Impact

Man-machine

language

(MML)commands

The number of carrier-level parameters is reduced.

The managed object LGCPORT in the transmission configuration is

replaced with RSCGRP.

The SBT parameter is added to the following managed objects:

− EthTrunkLink

− OMCh

− CFMMEP

− MPGroup

− E1T1LoopPara

− BFDSession

− EthOAM3AH

− PingFilter

− EthTrunk− PPPLink

− MPLink

− DevIP

− EthPort

− IPRoute

Some MML commands are added or modified to support new functions.

Alarms Alarm correlation is optimized by removing redundant and invalid

alarms.

New alarms are added.







6

Item Impact

Performance

measurement

The function subset Feature Performance Test is added.

Performance counters are added to support new functions.

The location parameter SubboardType is added to function subsetsEthPort, E1T1, PPP, and MPGRP.

The function subset LGCPORT is replaced with RSCGRP.

The following location parameters are added to RSCGRP:

− BearType

− SubboardType

− PhyPortType

− PhyPortNo

− RscGrp

− RscGrpNo

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 Batch adjustment and cold parameter modification notification are

added.

Regular configuration checks are added.

WiMAX configuration system (WCS) deployment and capacityexpansion wizards are updated.

NHC The following check items are added: Key indicators related to remote electrical tilt (RET) antennas

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 1-6 New operation and maintenance functions in V300R003C01

Function Description

Customized 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 call information

according to the structure field documentation provided by Huawei.







7


MS information

query optimized

The following parameters are added to the DSP ALLMSINFO

command:

ULPER NI

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. A trial license

does not affect other functions for which licenses have been purchased. The default trial period is three months.

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

system automatically checks benchmark parameters as scheduled.

The neighboring cell parameter import function is added to thetemplate-based and clone-based site deployment wizards.

Neighboring cell parameters and radio parameters can be modified

in batches on the WCS.

A notification message is displayed when you attempt to modify acold parameter. After a cold parameter is modified, you must block

carriers for the modification to take effect.

Jitter information

collection and

graphical display

You can collect network latency and jitter information based on the

IEEE 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 facilitatesalarm clearance.

Control overLMT-basedmanual alarm

clearance

You can run an MML command to disable LMT-based manual alarmclearance. This prevents site engineers from manually clearing thesealarms.

Engineering

quality self-check

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

routine health check item. This self-check consists of subitemsrelated 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 passesthe check and also contain check criteria and related MML command

execution results. This facilitates fault analysis and location.

Upgrade efficiency

improvement and

upgrade rollback

BS software packages are compressed more efficiently. As a result,

downloaded and activated more quickly.

Version rollback can be performed if necessary after a hot patch isinstalled.







8


Network

managementsystem (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 tomanage and maintain a WiMAX-LTE system:

Alarm management: Alarms are reported if configurations conflict.

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 BSand eNodeB are bound.

Base station binding: The M2000 automatically binds the BS and

eNodeB if the check results indicate that they are not bound.

Version matching check: The M2000 checks whether the BSversion and the eNodeB version match before an upgrade is performed. The upgrade is performed only when the versions

match.

1.7 Other NEs

Table 1-7 describes whether new functions have impact on V300R003C00 NEs. For details,

see chapter 3 "Impacts of V300R003C01 Functions on V300R003C00."

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

Function SS/MS

DBS3900 BTS3702C BTS3701B ASN-GW

Enhanced multi-carrier

load balancingYes Yes Yes No No

UL EFFR Yes Yes Yes Yes No

DL EFFR No Yes Yes Yes No

UL SDMA Yes Yes No Yes No

Interference

countermeasuresYes Yes Yes Yes No

DL power control Yes Yes No No No

Modulation and codingscheme (MCS) levelselection optimized

when interferencerejection combining

(IRC) is enabled

No Yes No Yes No







9

Function SS/MS

DBS3900 BTS3702C BTS3701B ASN-GW

UL SBC-REQ coverage

optimizedYes 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

optimized No Yes No No No

In the SS/MS and ASN-GW columns, No indicates that new function does not have impact on SSs, MSs,or ASN-GWs because they are not involved in new functions. In the DBS3900, BTS3702C, BTS3701B columns, No indicates that new function does not have impact on DBS3900s, BTS3702Cs, BTS3701Bs

because they do not support new functions.

1.8 Other FeaturesFor details, see chapter 3 "Impacts of V300R003C01 Functions on V300R003C00."




Network Impact Report (Compared with V300R003C00) 2 Summary of Function Impacts



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2 Summary of Function Impacts

This chapter describes the impacts of new and enhanced functions on V300R003C00, and provides the mapping between the functions and the features in the feature list.

Table 2-1Table 2-1 lists the impacts of functions in V300R003C01 on the system.

Table 2-1 Impacts of functions in V300R003C01 on the system

Feature ID FeatureName

Function Basic orOptional

New orEnhanced

Impact

WBFD-0080

05001

Load

Balancing

Enhanced

multi-carrierload balancing

Basic Enhanced Minor

WBFD-0120

05001

UL EFFR

NetworkingUL EFFR Basic Enhanced Major

WBFD-1010

01001

DL

PUSC+PUSCwith All SC

FFR Networking

DL EFFR Basic Enhanced Minor

WBFD-1500

04001UL SDMA UL SDMA Basic New Minor

WBFD-0160

20001

Network TDD

Interference

Detection

Interference

countermeasuresBasic New Minor

WBFD-0120

07001

DL Power

Control

DL power

controlBasic New Minor

WBFD-0020

12001

Two-Antenna

UL DiversityReceiving

MCS level

selectionoptimized when

IRC is enabled

Basic Enhanced Major

WBFD-0190

01001

Four-Antenna

UL Diversity

Receiving




Network Impact Report (Compared with V300R003C00) 2 Summary of Function Impacts



11

Feature ID FeatureName

Function Basic orOptional

New orEnhanced

Impact

WBFD-0100

01001AMC

WBFD-0060

04001

Access

Enhancement

in RNG andSBC

UL SBC-REQ

coverage

optimized


WBFD-170002001

Air InterfaceSynchronizati

on ClockSystem

Air interfacesynchronization

clock system


WBFD-0110

01001CC-HARQ HARQ category

5 and category 6Basic Enhanced Minor

WBFD-1400

01001Beamforming Beamforming

optimizedBasic Enhanced Minor

In Table 2-1, the impacts are classified as Minor and Major. A function has major impacts on

the 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 chapter 3 "Impacts of V300R003C01 Functions on V300R003C00."




Network Impact Report (Compared with V300R003C00) 3 Impacts of V300R003C01 Functions on V300R003C00



12

3 Impacts of V300R003C01 Functions onV300R003C00

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, 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.







13

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.

3.1.4 Inter-NE Interfaces

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 3-1 Modified MML commands

MML Command Description

ADD CARRIERBASICINFO

MOD CARRIERBASICINFO

The MULTICARRIERIND parameter is added.

Configure carriers with high signal quality as outer

carriers and carriers with low signal quality as inner

carriers on a multi-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 3-2 New performance counters related to enhanced multi-carrier load balancing

Performance Counter Description Number of Handovers

Triggered by UL LoadBalancing

Number of handovers triggered by uplink load balancing

within a measurement period. This counter is used toevaluate how frequently balancing handovers are triggered

by uplink load balancing.

Number of HandoversTriggered by DL Load

Balancing

Number of handovers triggered by downlink load balancingwithin a measurement period. This counter is used to

evaluate how frequently balancing handovers are triggered by downlink load balancing.







14

Performance Counter Description Number 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 the percentage 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.







15

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 atthe central band to use all of the frequency resources. This expands network coverage andimproves sector capacity. In V300R003C00, UL EFFR is known as inter-cell interference

coordination (ICIC), and the extended band is not used.

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 bandto improve UL spectral efficiency.

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

Figure 3-1 UL 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, channelquality indication channel (CQICH) performance, and acknowledgment (ACK) channel

performance.

3.2.3 Hardware

There is no impact on hardware.







16




Data Configuration

The MOD ULEFFRPARA command in V300R003C01 replaces the MOD ICICPARA

command in V300R003C00. In addition, the following parameters are added to the MOD

ULEFFRPARA command:

EDGEALLSYMBOLSWITCH

ULEXTENABLENITHESH

ULINEXTFECREDUCEDVALUE

ULINEXTFECTHRESH

ULINEXTREPETITIONTHRESH

ULINEXTFECREDUCEDVALUE

SDMAPLUSEFFROFFSET


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

Table 3-3 New performance counters related to UL EFFR

Performance Counter Description Number of Occupied

Slots at Extended Bandon the Uplink

Number of slots used in the uplink extension band within a

measurement 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 to evaluate the

possibility of enabling the uplink extension band and resourceusage in the uplink extension band.

Throughput of ExtendedBand on the Uplink

Throughput in the uplink extension band within ameasurement period. This counter is used to calculate the

average throughput in the extension band.

Total Number of Packets

Received by Extended

Band on the Uplink

Total number of packets received in the uplink extension band

within a measurement period. This counter is used to calculate

the error packet rate in the extension band.

Number of Error Packets

Received by ExtendedBand on the Uplink

Total number of error packets received in the uplink extension

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







17

Performance Counter Description Number of Successful

MS Handovers fromEdge Band to Center

Band on the Uplink

Number of successful MS handovers from uplink edge band to

uplink center band within a measurement period. This counteris used to evaluate how frequently the MS handovers from

edge band to center band and calculate the success rate of thehandover.

Number of Failures in

MS Handovers from

Edge Band to Center

Band on the Uplink

Number of unsuccessful MS handovers from uplink edge band

to uplink center band within a measurement period. This

counter is used to evaluate how frequently the MS handovers

from edge band to center band and calculate the success rate ofthe handover.

Number of Successful

MS Handovers from

Center Band to Edge

Band on the Uplink

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 MS handovers

from center band to edge band and calculate the success rate ofthe handover.

Number of Failures in

MS Handovers fromCenter Band to Edge

Band on the Uplink

Number of unsuccessful MS handovers from uplink center

band to uplink edge band within a measurement period. Thiscounter is used to evaluate how frequently the MS handovers

from center band to edge band and calculate the success rate ofthe handover.

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 average interference 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 interference leveland 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 ratioof 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 is used to

evaluate the average interference level in the edge band.

NI of Common Region Average NI in the uplink common zone within a measurement

period. This counter is used to evaluate the average

interference level in the uplink common zone and channelquality in the common zone.


Density (CommonRegion)

Interference density based on the NI in the common zone

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







18

Performance Counter Description NI-Based Interference

Intensity (CommonRegion)

Average value in the common zone NI that exceeds the

threshold (119 dBm) within a measurement period. Thiscounter is used to evaluate the interference level in the

common 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 the congestion level inthe uplink center band.

Number of SDMA

Decisions for MSs on theBorder

Total number of decisions on whether to enable SDMA for

cell edge MSs within a measurement period. This counter isused to calculate the total number of SDMA decisions due to

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

Number of Times SDMA

Is Enabled for MSs onthe Border

Number of times SDMA is enabled for cell edge MSs within a

measurement period. This counter is used to calculate thenumber of times that the uplink

carrier-to-interference-and-noise ratio (CINR) of cell edgeMSs reaches the SDMA NI threshold.

Number of Slots Used for

SDMA Partnership at theEdge Band

Number of slots available for SDMA multiplexing for MSs in

the edge band within a measurement period. This counter isused to calculate the total number of slots that can be used forSDMA multiplexing for MSs in the edge band.

Number of SlotsSuccessfully Paired forSDMA-enabled Center

Users at the Edge Band

Number of slots used for SDMA multiplexing for center MSsin the edge band within a measurement period. This counter isused to calculate the number of slots successfully used for

SDMA multiplexing for center MSs in the edge band.

Number of SlotsSuccessfully Paired for

SDMA-enabled EdgeUsers at the Edge Band

Number of slots used for SDMA multiplexing for cell edgeMSs in the edge band within a measurement period. This

counter is used to calculate the number of slots successfullyused for SDMA multiplexing for cell edge MSs in the edge

band.

Number of Bytes Used

for SDMA Partnership at

the Edge Band

Number of bytes available for SDMA multiplexing for MSs in

the edge band within a measurement period. This counter is

used to calculate the total number of bytes that can be used forSDMA multiplexing for MSs in the edge band.

Number of BytesSuccessfully Paired forSDMA-enabled Center

Users at the Edge Band

Number of bytes used for SDMA multiplexing for center MSsin the edge band within a measurement period. This counter isused to calculate the number of bytes transmitted in slots

successfully used for SDMA multiplexing for center MSs inthe edge band.

Number of Bytes

Successfully Paired forSDMA-enabled EdgeUsers at the Edge Band

Number of bytes used for SDMA multiplexing for cell edge

MSs in the edge band within a measurement period. Thiscounter indicates the number of bytes transmitted in slotssuccessfully used for SDMA multiplexing for cell edge MSs inthe edge band.







19

Fault Management


3.2.6 Other NEsThe 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 OFDMA

symbol offset and 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, andtime-frequency resources are effectively used. This improves spectral efficiency.

Similar to DL FFR, DL EFFR divides a subframe into a PUSC with partial subchannels zone

and a PUSC with all subchannels zone. The PUSC with partial subchannels zone can be aPUSC 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.







20

Figure 3-2 Subframe 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 MIMO

B+beamforming mode are optimized.


System Capacity

DL EFFR increases BS DL throughput.

Network Performance

DL EFFR improves BE subscriber experience.

3.3.3 Hardware










21


Data Configuration

The following MML commands are added:

MOD DLEFFRPARA

LST DLEFFRPARA

The following MML commands are removed:

MOD FFRPARA

LST FFRPARA

The meaning and value range of the DLZONEIND parameter are modified in the following

MML commands:

MOD CARRIERZONEINFO LST CARRIERZONEINFO


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

Table 3-4 New performance counters related to DL EFFR

Performance Counter Description

Number of Times MSs

Exit the Network Dueto Air Link Failures inthe DL 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. Thiscounter 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 counter is usedto evaluate the BE satisfaction level in the downlink PUSCPartial 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.







22


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 is used toevaluate BE satisfaction level in the downlink PUSC All zone.

Total Number of BEService Flows at the DL

All Zone

Total number of BE service flows in the downlink PUSC Allzone within a measurement period. This counter is used to

evaluate BE satisfaction level in the downlink PUSC All zone.

BE Satisfaction at theDL All Zone

Satisfaction level of BE service flows in the downlink PUSC Allzone within a measurement period. This counter is used to

evaluate user experience of services in the downlink PUSC Allzone.

Fault ManagementThere is no impact on fault management.

3.3.6 Other NEs

There is no impact on other NEs.



3.4 UL SDMA

3.4.1 Description

When UL SDMA is enabled, the spatial multiplexing technology allows multiple MSs to usethe 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 BSselects 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 in Figure3-3.







23

Figure 3-3 UL SDMA gain principle

As shown in Figure 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 occupied by 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 UL

throughput.


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 Hardware










24


Data Configuration

The following parameters are added to the MOD MIMOPARA and LST MIMOPARA commands:

ULVIRTUALMIMOMODE

SDMAENTHDOFFSET

SDMADISTHDOFFSET


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

Table 3-5 New performance counters related to UL SDMA


Number of Decisions on

Whether to Enable UL

SDMA

Number of decisions on whether to enable uplink SDMA

within a measurement period. This counter is used to

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 the possibility of enabling SDMA.

Number of Slots Used forPartnership Between UL

SDMA MSs

Number of slots available for uplink SDMA multiplexingwithin a measurement period. This counter is used to

calculate the MS matching success rate.

Number of Bytes Used for

Partnership Between UL

SDMA MSs

Number of bytes available for uplink SDMA multiplexing


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.

Number of Bytes Used for

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.







25


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








26

MOD ANTIINTERFERE

STR PREAMBLESCAN

STP PREAMBLESCAN

DSP PREAMBLESCAN


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

Table 3-6 New performance counters related to interference countermeasures


NI of Uplink Safety Zone Average NI in the first three symbols in the uplink safety

zone within a measurement period. This counter is used to

evaluate the average interference level and channel quality in

the safety zone.

Number of Times the First

Three UL Symbols Are

Interfered With

Number of times there is interference in the first three

symbols in the uplink safety zone within a measurement

period. This counter is used to evaluate interference level in

the first three symbols and indicate whether the safety zonemust be configured.

Number of Times

Interference in the First

Three UL Symbols IsCleared

Number of times there is no interference in the first three

symbols in the uplink safety zone within a measurement

period. This counter is used to evaluate interference level inthe first three symbols and indicate whether the safety zonemust be canceled.

Fault Management The BS reports an interference alarm upon detecting that the difference between the

common band NI and the data region NI exceeds the value of the ULNIDETECTTH

parameter or that the absolute value of the common band NI is higher than the specifiedthreshold.

The BS clears the interference alarm upon detecting that the difference between thesafety zone NI and the data region NI is smaller than the value of the

ULNIDETECTTH parameter.

3.5.6 Other NEs

The MS must allow adding of a safety zone before the common band.


Preamble scanning has priority over any other functions such as reverse spectral

scanning. Therefore, other commands are terminated when they conflict with the STR

PREAMBLESCAN command.

Interference on the UL common band increases if UL EFFR is enabled and safety zonesare configured. Therefore, enable IRC to maintain UL EFFR performance.







27

3.6 DL Power Control

3.6.1 Description

When DL power control is enabled, a lower-level MCS is used and the DL transmit power ofsome MSs is decreased to reduce intra-frequency interference between BSs without affectingthe MS quality of service (QoS) performance.

To maintain sector throughput, MCS levels can be reduced only when the DL load is light.


System Capacity

DL power control helps increase the number of online MSs if loads are unbalanced on the

network.

Network Performance

Intra-frequency interference decreases between sectors.

3.6.3 Hardware

Only the DBS3900 using the 4HP BWA baseband processing and radio interface unit (BBBI)supports DL power control.




Data Configuration

The DLPCMODESWITCH parameter is added to the following MML commands:

MOD PCAMCPARA

LST PCAMCPARA

The DLPCMODESWITCH parameter is set to OFF by default.







28


Table 3-7 describes the new performance counters related to DL power control.

Table 3-7 New performance counters related to DL power control


Average Number of MSs

Under DL Power Control

Average number of MSs in the downlink power control

within a measurement period. This counter is used toevaluate how frequently the downlink power control takes

effect.

Average Power Decrease

Under DL Power Control

Average decreased amount of MS power in the downlink

power control within a measurement period. This counter is

used to evaluate the impact of the downlink power control onco-channel interference decrease.

Fault Management


3.6.6 Other NEs

DL power control is applicable only to the MSs that support dedicated pilots.


DL power control is not effective in the PUSC with partial subchannels zone.

3.7 MCS Level Selection Optimized When IRC Is Enabled

3.7.1 Description

When IRC is enabled, the BS measures the post-processing carrier-to-interference-and-noiseratio (CINR) after the pre-processing CINR measurement. The pre-processing CINR is

obtained at the baseband antenna port after linear combination, and the post-processing CINR

is obtained after maximum ratio combining (MRC) or IRC self-adaptation.In versions earlier than V300R003C01, only the pre-processing CINR is used to determine

MCS levels. As a result, the CINR does not improve after IRC is enabled.

In V300R003C01, the BS dynamically determines the UL receiving mode based on pre-processing and post-processing CINRs on the MS. This maximizes UL link spectral

efficiency.

This function defines three UL receiving modes:

Single-stream mode: CSM and SDMA are disabled, and the BS determines the MCSlevel based on the pre-processing CINR. This ensures link reliability and normal service

running when the radio conditions are poor.







29

Single-stream enhanced mode: CSM and SDMA are disabled, and the BS determines theMCS level based on the post-processing CINR. Compared with single-stream mode, this

mode improves spectral efficiency and link availability when there is interference.

CSM-SDMA mode: CSM or SDMA is enabled, and space multiplexing is used. This

mode uses the pre-processing CINR to determine the MCS level. Compared withsingle-stream mode, CSM-SDMA mode doubles spectral efficiency in optimal channel

conditions.

The BS selects the UL receiving mode that can maximize spectral efficiency.


System Capacity

This function helps increase UL throughput when interference is strong.

Network PerformanceThis function helps increase MS UL throughput when interference is strong.

3.7.3 Hardware

This function cannot be used on the BTS3702C, because it does not support IRC.




Data Configuration

The following parameters are added to the MOD PCAMCPARA and LST PCAMCPARA

commands:

ULESNGLMODESWITCH

ULSNGLMODEPERTH

ULPARTNERPROB

The ULESNGLMODESWITCH parameter is set to OFF by default.


Table 3-8 describes the new performance counters related to MCS level selection optimizedwhen IRC is enabled.







30

Table 3-8 New performance counters related to MCS level selection optimized when IRC isenabled


Number of Slots Received by Using IRC at the Center

Band on the Uplink

Total number of slots that the BS receives using IRC at thecenter band on the uplink within a measurement period.

This counter is used to evaluate the IRC efficiency. Themeasured value is invalid if EFFR is not used on the

uplink.

Number of Slots Received

by Using IRC on the Uplink

Number of slots the BS receives using IRC on the uplink.

This counter is used to evaluate the IRC efficiency.

Fault Management


3.7.6 Other NEs

There is no impact on other NEs.



3.8 UL SBC-REQ Coverage Optimized

3.8.1 Description

The SBC-REQ message used during MS network entry is large in size, and cannot besegmented. Three subchannels are used to transmit the SBC-REQ message, which increases

the possibility of transmission failures. This decreases UL network coverage and reduces thenetwork entry success rate.

In V300R003C01, a BS sends an MS the SBC-RSP message containing the minimumcapability set attribute if it does not receive an SBC-REQ message from the MS. This helps

expand BS coverage.


System Capacity


Network Performance

This function helps expand network coverage and improve the radio access success rate.







31

3.8.3 Hardware


3.8.4 Inter-NE InterfacesThere is no impact on inter-NE interfaces.


Data Configuration

There is no impact on data configuration.


Table 3-9 describes the new performance counters related to UL SBC-REQ coverageoptimized.

Table 3-9 New performance counters related to UL SBC-REQ coverage optimized


Number of SBC-RSP MessagesSent by BS for the First Time

Number of times the BS actively sends the SBC-RSPmessages when the BS does not receive the SBC-REQ

from the MS within a measurement period. This counter

is used to evaluate the effect of the uplink SBC-REQoptimization coverage solution.

Number of Times the BS Failsto Send SBC-RSP After the

Maximum of Retransmissions

Number of times the BS does not receive the BR headerfrom the MS requesting bandwidth for the primary

connection identifier (CID) when the number ofSBC-RSP message resending times reach the maximumvalue. This counter is used to evaluate the effect of the

uplink SBC-REQ optimization coverage solution.

Number of BR MAC Headers

from MSs for Requesting

Bandwidth for SBC-REQ

Number of times the BS receives BR headers from the

MS requesting bandwidth for the SBC-REQ message

within a measurement period.

Fault Management


3.8.6 Other NEs

This function is subject to the BS minimum capability set and the MS capability on the PHY.If an MS does not support a function specified in the SBC-RSP message, the followingconditions may occur:

The MS exits the network.

The MS does not exit the network, but the function is performed abnormally.







32



3.9 Air Interface Synchronization Clock System

3.9.1 Description

This function is applicable to indoor coverage where Global Positioning System (GPS) clock

synchronization usually fails due to weak indoor GPS signals. Preamble signals travel over a

longer distance than broadcast signals and service signals do in a WiMAX BS. The airinterface synchronization clock system enables a BS to demodulate preamble signals sent

from neighboring BSs to obtain a synchronization clock source. Then, the BS synchronizes itstime and frequency with those of a neighboring BS. This function achieves clock

synchronization in indoor coverage at a low cost.


System Capacity

Throughput decreases by less than 3%, because several data frames are not used for data

transmission periodically over the air interface when the BTS3701B is receiving preamblesignals from the clock source.

Network Performance

There is no impact on network performance.

3.9.3 Hardware

Only the BTS3701B supports this function.




Data Configuration


ADD AIRITFSYNCCLK

LST AIRITFSYNCCLK

RMV AIRITFSYNCCLK


There is no impact on performance counters.







33

Fault Management


3.9.6 Other NEsThere is no impact on other NEs.


When this function is enabled, a BS synchronizes only frequencies and radio frames withneighboring BSs. Therefore, fast ranging is not supported when this function is enabled.

3.10 HARQ Category 5 and Category 6

3.10.1 Description

In V300R003C01, HARQ category 5 and category 6 are introduced to increasesingle-subscriber peak throughput on the UL and DL.

Compared with HARQ category 4, HARQ category 5 increases the DL buffering size and the

number of UL HARQ channels, and therefore UL and DL throughput improves. Compared

with HARQ category 5, HARQ category 6 increases the UL buffering size and furtherimproves UL peak throughput.


System Capacity


Network Performance

This function increases the single-subscriber peak rate.

3.10.3 Hardware





Data Configuration

The value range of the HARQCHASEBUFCAP parameter is modified in the MOD

HARQPARA command to support HARQ category 5 and category 6.







34


There is no impact on performance counters.

Fault ManagementThere is no impact on fault management.

3.10.6 Other NEs

MSs that support HARQ category 5 and category 6 must be used.


HARQ category 5 and category 6 may fail to reach the theoretical single-subscriber peak ratewhen beamforming is enabled.

3.11 Beamforming Optimized

3.11.1 Description

In V300R003C01, beamforming is optimized as follows:

Use of CQICH-based weight estimation algorithm: Compared with the pilot-based beamforming weight estimation algorithm, the CQICH-based weight estimation

algorithm provides high precision, optimal interference suppression, and no additional

overhead for the UL bandwidth.

Restriction on MS scheduling for the space time coding (STC) zone: The statistic resultsfrom beamforming commercial sites indicate that some MSs supporting dedicated pilots

(DPs) fail to meet beamforming requirements and are scheduled for the STC zone. As aresult, resources are wasted in the STC zone.

In V300R003C01, only a few MSs can be scheduled for the STC zone, and themechanism for detecting idle MSs in the dedicated pilot zone is optimized.


System Capacity

BS DL capacity increases.

Network Performance

Data rates for all MSs on the network increase.

3.11.3 Hardware










35


Data Configuration

There is no impact on data configuration.


Table 3-10 describes the new performance counters related to beamforming optimized.

Table 3-10 New performance counters related to beamforming optimized


Number of Times Resources

Are Scheduled for BF Users

Number of times resources are scheduled for all

beamforming MSs in MIMO-B+DP-PW-AW,

MIMO-A+DP-PW-AW, and DP-PW-AW modes on asector carrier within a measurement period. This counterindicates how frequently the BS enables beamforming.

Number of Shifts Between BF

Users and N-BF users

Number of times all MSs switch between beamforming

and non-beamforming modes on a sector carrier within ameasurement period.

Number of Switches Betweenthe DP Mode and Non-DP

Mode

Number of times all MSs switch between DP and non-DPmodes on a sector carrier within a measurement period.

Average Number of

Non-MIMO-B MSs in thePartial Zone with Dedicated

Pilots

Average number of MIMO-A and non-MIMO MSs (using

dedicated pilots) in the PUSC Partial zone inMIMO-A+DP-AW, MIMO-A+DP-PW-AW,

DP-PW-AW, and DP-AW modes within a measurement

period.

Average Number of MIMO-B

MSs in the Partial Zone withDedicated Pilots

Average number of MIMO-B MSs (using dedicated

pilots) in the PUSC Partial zone in MIMO B+DP-AW andMIMO B+DP-PW-AW modes within a measurement

period.

Average Number of

Non-MIMO-B MSs in the

PUSC All Zone with

Dedicated Pilots

Average number of MIMO-A and non-MIMO MSs (using

dedicated pilots) in the PUSC All zone in

MIMO-A+DP-AW, MIMO-A+DP-PW-AW,

DP-PW-AW, and DP-AW modes within a measurement period.

Average Number of MIMO-B

MSs in the PUSC All Zone

with Dedicated Pilots


pilots) in the PUSC All zone in MIMO B+DP-AW and

MIMO B+DP-PW-AW modes.

Number of Slots Occupied by

Non-MIMO-B Users in DLPUSC All ZoneQPSK1/2Rep6 with Dedicated

Pilots


pilots) in the PUSC All zone in MIMO B+DP-AW andMIMO B+DP-PW-AW modes.







36



Non-MIMO-B Users in DLPUSC All Zone

QPSK1/2Rep4 with DedicatedPilots

Total number of slots occupied by MIMO-A and

non-MIMO MSs (using dedicated pilots) in the PUSC Allzone on the downlink when the MCS mode is

QPSK1/2REP4. The number of slots occupied bymanagement connections and traffic connections is

counted, including the number of slots used for HARQretransmission of subbursts. This counter has the

following functions: It is used with other counters toevaluate the quality of downlink channels on a sectorcarrier and the distribution of MSs' MCS modes. It is used

with the number of bytes scheduled to obtain the coding

efficiency of MSs using dedicated pilots. It is used withthe number of slots scheduled in dedicated pilots to obtain

the amount of resources wasted due to beamforming.

Number of Slots Occupied by Non-MIMO-B Users in DL

PUSC All ZoneQPSK1/2Rep2 with Dedicated

Pilots

Total number of slots occupied by MIMO-A andnon-MIMO MSs (using dedicated pilots) in the PUSC All

zone on the downlink when the MCS mode isQPSK1/2REP2. The number of slots occupied by

management connections and traffic connections iscounted, including the number of slots used for HARQ

retransmission of subbursts. This counter has the

following functions: It is used with other counters toevaluate the quality of downlink channels on a sector

carrier and the distribution of MSs' MCS modes. It is usedwith the number of bytes scheduled to obtain the coding

efficiency of MSs using dedicated pilots. It is used withthe number of slots scheduled in dedicated pilots to obtainthe amount of resources wasted due to beamforming.


Non-MIMO-B Users in DLPUSC All Zone QPSK1/2 with

Dedicated Pilots


non-MIMO MSs (using dedicated pilots) in the PUSC Allzone on the downlink when the MCS mode is QPSK1/2.

The number of slots occupied by managementconnections and traffic connections is counted, including

the number of slots used for HARQ retransmission of

subbursts. This counter has the following functions: It isused with other counters to evaluate the quality ofdownlink channels on a sector carrier and the distributionof MSs' MCS modes. It is used with the number of bytes

scheduled to obtain the coding efficiency of MSs usingdedicated pilots. It is used with the number of slotsscheduled in dedicated pilots to obtain the amount of

resources wasted due to beamforming.







37



Non-MIMO-B Users in DLPUSC All Zone QPSK3/4 with

Dedicated Pilots


non-MIMO MSs (using dedicated pilots) in the PUSC Allzone on the downlink when the MCS mode is QPSK3/4.


the number of slots used for HARQ retransmission ofsubbursts. This counter has the following functions: It is

used with other counters to evaluate the quality ofdownlink channels on a sector carrier and the distributionof MSs' MCS modes. It is used with the number of bytes

scheduled to obtain the coding efficiency of MSs using

dedicated pilots. It is used with the number of slotsscheduled in dedicated pilots to obtain the amount of



PUSC All Zone 16QAM1/2with Dedicated Pilots


zone on the downlink when the MCS mode is 16QAM1/2.The number of slots occupied by management

connections and traffic connections is counted, includingthe number of slots used for HARQ retransmission of

subbursts. This counter has the following functions: It is

used with other counters to evaluate the quality ofdownlink channels on a sector carrier and the distribution

of MSs' MCS modes. It is used with the number of bytesscheduled to obtain the coding efficiency of MSs using

dedicated pilots. It is used with the number of slotsscheduled in dedicated pilots to obtain the amount ofresources wasted due to beamforming.


Non-MIMO-B Users in DLPUSC All Zone 16QAM3/4



non-MIMO MSs (using dedicated pilots) in the PUSC Allzone on the downlink when the MCS mode is 16QAM3/4.












38














PUSC All Zone 64QAM2/3with Dedicated Pilots


zone on the downlink when the MCS mode is 64QAM2/3.The number of slots occupied by management






















39



Non-MIMO-B Users in DLPartial Zone QPSK1/2Rep6



non-MIMO MSs (using dedicated pilots) in the PUSCPartial zone on the downlink when the MCS mode is








Partial Zone QPSK1/2Rep4with Dedicated Pilots

Total number of slots occupied by MIMO-A andnon-MIMO MSs (using dedicated pilots) in the PUSC

Partial zone on the downlink when the MCS mode isQPSK1/2REP4. The number of slots occupied by







Non-MIMO-B Users in DLPartial Zone QPSK1/2Rep2





counted, including the number of slots used for HARQ

retransmission of subbursts. This counter has thefollowing functions: It is used with other counters toevaluate the quality of downlink channels on a sectorcarrier and the distribution of MSs' MCS modes. It is used

with the number of bytes scheduled to obtain the codingefficiency of MSs using dedicated pilots. It is used withthe number of slots scheduled in dedicated pilots to obtain








40



Non-MIMO-B Users in DLPartial Zone QPSK1/2 with

Dedicated Pilots



QPSK1/2. The number of slots occupied by managementconnections and traffic connections is counted, including







Partial Zone QPSK3/4 withDedicated Pilots


Partial zone on the downlink when the MCS mode isQPSK3/4. The number of slots occupied by management







Non-MIMO-B Users in DLPartial Zone 16QAM1/2 with

Dedicated Pilots



16QAM1/2. The number of slots occupied bymanagement connections and traffic connections is











41




Dedicated Pilots










Partial Zone 64QAM1/2 withDedicated Pilots


Partial zone on the downlink when the MCS mode is64QAM1/2. The number of slots occupied by








Dedicated Pilots














42




Dedicated Pilots









Number of Slots Occupied byMIMO-B Users in DL PUSC

All Zone QPSK1/2 withDedicated Pilots

Total number of slots occupied by MIMO-B MSs (usingdedicated pilots) in the PUSC All zone on the downlink

when the MCS mode is QPSK1/2. The number of slotsoccupied by management connections and traffic

connections is counted, including the number of slots usedfor HARQ retransmission of subbursts. This counter has

the following functions: It is used with other counters to

evaluate the quality of downlink channels on a sectorcarrier and the distribution of MSs' MCS modes. It is used

with the number of bytes scheduled to obtain the codingefficiency of MSs using dedicated pilots. It is used with

the number of slots scheduled in dedicated pilots to obtainthe amount of resources wasted due to beamforming.


MIMO-B Users in DL PUSCAll Zone QPSK3/4 withDedicated Pilots

Total number of slots occupied by MIMO-B MSs (using

dedicated pilots) in the PUSC All zone on the downlinkwhen the MCS mode is QPSK3/4. The number of slotsoccupied by management connections and traffic

connections is counted, including the number of slots usedfor HARQ retransmission of subbursts. This counter has

the following functions: It is used with other counters to

evaluate the quality of downlink channels on a sectorcarrier and the distribution of MSs' MCS modes. It is usedwith the number of bytes scheduled to obtain the codingefficiency of MSs using dedicated pilots. It is used with








43



MIMO-B Users in DL PUSCAll Zone 16QAM1/2 with

Dedicated Pilots


dedicated pilots) in the PUSC All zone on the downlinkwhen the MCS mode is 16QAM1/2. The number of slots

occupied by management connections and trafficconnections is counted, including the number of slots used

for HARQ retransmission of subbursts. This counter hasthe following functions: It is used with other counters to

evaluate the quality of downlink channels on a sectorcarrier and the distribution of MSs' MCS modes. It is usedwith the number of bytes scheduled to obtain the coding

efficiency of MSs using dedicated pilots. It is used with




Dedicated Pilots





evaluate the quality of downlink channels on a sector





All Zone 64QAM1/2 withDedicated Pilots


when the MCS mode is 64QAM1/2. The number of slotsoccupied by management connections and trafficconnections is counted, including the number of slots used



carrier and the distribution of MSs' MCS modes. It is usedwith the number of bytes scheduled to obtain the codingefficiency of MSs using dedicated pilots. It is used withthe number of slots scheduled in dedicated pilots to obtain








44




Dedicated Pilots










Dedicated Pilots










All Zone 64QAM5/6 withDedicated Pilots


when the MCS mode is 64QAM5/6. The number of slotsoccupied by management connections and trafficconnections is counted, including the number of slots used



carrier and the distribution of MSs' MCS modes. It is usedwith the number of bytes scheduled to obtain the codingefficiency of MSs using dedicated pilots. It is used withthe number of slots scheduled in dedicated pilots to obtain








45



MIMO-B MSs in the DLPartial Zone QPSK1/2 with

Dedicated Pilots


dedicated pilots) in the PUSC Partial zone on thedownlink when the MCS mode is QPSK1/2. The number

of slots occupied by management connections and trafficconnections is counted, including the number of slots used






MIMO-B MSs in the DLPartial Zone QPSK3/4 with

Dedicated Pilots


dedicated pilots) in the PUSC Partial zone on thedownlink when the MCS mode is QPSK3/4. The number

of slots occupied by management connections and trafficconnections is counted, including the number of slots used






Number of Slots Occupied byMIMO-B MSs in the DL


Total number of slots occupied by MIMO-B MSs (usingdedicated pilots) in the PUSC Partial zone on the

downlink when the MCS mode is 16QAM1/2. Thenumber of slots occupied by management connections andtraffic connections is counted, including the number of

slots used for HARQ retransmission of subbursts. Thiscounter has the following functions: It is used with other

counters to evaluate the quality of downlink channels on a

sector carrier and the distribution of MSs' MCS modes. Itis used with the number of bytes scheduled to obtain thecoding efficiency of MSs using dedicated pilots. It is usedwith the number of slots scheduled in dedicated pilots to

obtain the amount of resources wasted due to beamforming.







46



MIMO-B MSs in the DLPartial Zone 16QAM3/4 with

Dedicated Pilots


dedicated pilots) in the PUSC Partial zone on thedownlink when the MCS mode is 16QAM3/4. The

number of slots occupied by management connections andtraffic connections is counted, including the number of


counters to evaluate the quality of downlink channels on asector carrier and the distribution of MSs' MCS modes. Itis used with the number of bytes scheduled to obtain the

coding efficiency of MSs using dedicated pilots. It is used

with the number of slots scheduled in dedicated pilots toobtain the amount of resources wasted due to

beamforming.




downlink when the MCS mode is 64QAM1/2. Thenumber of slots occupied by management connections and

traffic connections is counted, including the number ofslots used for HARQ retransmission of subbursts. This

counter has the following functions: It is used with other

counters to evaluate the quality of downlink channels on asector carrier and the distribution of MSs' MCS modes. It

is used with the number of bytes scheduled to obtain thecoding efficiency of MSs using dedicated pilots. It is used

with the number of slots scheduled in dedicated pilots toobtain the amount of resources wasted due to beamforming.



Dedicated Pilots




slots used for HARQ retransmission of subbursts. This

counter has the following functions: It is used with othercounters to evaluate the quality of downlink channels on asector carrier and the distribution of MSs' MCS modes. Itis used with the number of bytes scheduled to obtain the

coding efficiency of MSs using dedicated pilots. It is usedwith the number of slots scheduled in dedicated pilots toobtain the amount of resources wasted due to

beamforming.







47




Dedicated Pilots





counters to evaluate the quality of downlink channels on asector carrier and the distribution of MSs' MCS modes. Itis used with the number of bytes scheduled to obtain the

coding efficiency of MSs using dedicated pilots. It is used

with the number of slots scheduled in dedicated pilots toobtain the amount of resources wasted due to

beamforming.




downlink when the MCS mode is 64QAM5/6. Thenumber of slots occupied by management connections and

traffic connections is counted, including the number ofslots used for HARQ retransmission of subbursts. This

counter has the following functions: It is used with other

counters to evaluate the quality of downlink channels on asector carrier and the distribution of MSs' MCS modes. It

is used with the number of bytes scheduled to obtain thecoding efficiency of MSs using dedicated pilots. It is used

with the number of slots scheduled in dedicated pilots toobtain the amount of resources wasted due to beamforming.

Number of Bytes Scheduled

by MIMO-B MSs in the DLPUSC All Zone with

Dedicated Pilots

Total number of bytes scheduled for MIMO-B MSs

(using dedicated pilots) in the PUSC All zone of a sectorcarrier within a measurement period. This counter

indicates the traffic volume of MIMO-B MSs usingdedicated pilots.


by Non-MIMO-B MSs in the

DL PUSC All Zone with

Dedicated Pilots

Total number of bytes scheduled for MIMO-A and

non-MIMO MSs (using dedicated pilots) in the PUSC All

zone of a sector carrier within a measurement period. This

counter indicates the traffic volume of MIMO-A and

non-MIMO MSs using dedicated pilots.


by MIMO-B MSs in the DL

Partial Zone with Dedicated

Pilots

Total number of bytes scheduled for MIMO-B MSs

(using dedicated pilots) in the PUSC Partial zone of a

sector carrier within a measurement period. This counter

indicates the traffic volume of MIMO-B MSs usingdedicated pilots.


by Non-MIMO-B MSs in theDL Partial Zone with

Dedicated Pilots

Total number of bytes scheduled for MIMO-A and

non-MIMO MSs (using dedicated pilots) in the PUSCPartial zone of a sector carrier within a measurement

period. This counter indicates the traffic volume ofMIMO-A and non-MIMO MSs using dedicated pilots.







48


Number of Slots Scheduled

For Non-MIMO-B MSs in theDL Partial Zone with

Dedicated Pilots

Number of slots scheduled for MIMO-A and non-MIMO

MSs (using dedicated pilots) in the PUSC Partial zone ofa sector carrier within a measurement period, including

the number of slots used for HARQ retransmission.Scheduled slots are less than occupied slots because

scheduled slots do not include any slots wasted due toresource allocation limitation.


For Non-MIMO-B MSs in theDL PUSC All Zone with

Dedicated Pilots

Number of slots scheduled for MIMO-A and non-MIMO

MSs (using dedicated pilots) in the PUSC All zone of asector carrier within a measurement period, including the

number of slots used for HARQ retransmission.Scheduled slots are less than occupied slots because

scheduled slots do not include any slots wasted due to

resource allocation limitation.

Number of Slots ScheduledFor MIMO-B MSs in the DLPartial Zone with Dedicated

Pilots

Number of slots scheduled for MIMO-B MSs (usingdedicated pilots) in the PUSC Partial zone of a sectorcarrier within a measurement period, including the

number of slots used for HARQ retransmission.

Scheduled slots are less than occupied slots becausescheduled slots do not include any slots wasted due to

resource allocation limitation.


For MIMO-B MSs in the DL

PUSC All Zone withDedicated Pilots

Number of slots scheduled for MIMO-B MSs (using

dedicated pilots) in the PUSC All zone of a sector carrier

within a measurement period, including the number ofslots used for HARQ retransmission. Scheduled slots are

less than occupied slots because scheduled slots do notinclude any slots wasted due to resource allocationlimitation.

Average Number of

MIMO-BF Users

Number of slots scheduled for MIMO-B MSs (using

dedicated pilots) in the PUSC All zone of a sector carrier

within a measurement period, including the number of

slots used for Hybrid Automatic Repeat Request (HARQ)retransmission. Scheduled slots are less than occupied

slots because scheduled slots do not include any slotswasted due to resource allocation limitation.

Average Number of MIMO

B+BF Users

Average number of users that use MIMO B and

beamforming at the same time (MIMO B+beamformingusers) on a carrier within a measurement period. This

counter is used to indicate the distribution of MIMOB+beamforming users on a carrier.

Number of Attempts to Detectthe CQICH

Total number of times the BS checks CQICHs on a sectorcarrier within a measurement period. This counter is usedto calculate the percentage of missing CQICH checks.

Number of Attempts to Detectthe CQICH

Total number of times the BS checks CQICHs on a sectorcarrier within a measurement period. This counter is used

to calculate the percentage of missing CQICH checks.







49


Number of Slots Unoccupied

in the CDD Zone

Total number of slots unoccupied in the CDD zone within

a measurement period. This counter indicates whetherresources are wasted in the CDD zone. If a large number

of slots are unoccupied during busy hours, schedulingmay be inefficient.


in the STC Zone

Total number of slots unoccupied in the STC zone within

a measurement period. This counter indicates whether

resources are wasted in the STC zone. If a large number

of slots are unoccupied during busy hours, schedulingmay be inefficient.


in the DP Zone

Total number of slots unoccupied in the DP zone within a

measurement period. This counter indicates whether

resources are wasted in the DP zone. If a large number of

slots are unoccupied during busy hours, scheduling may be inefficient.


in the STC+DP Zone

Total number of slots unoccupied in the STC+DP zone

within a measurement period. This counter indicateswhether resources are wasted in the STC+DP zone. If a

large number of slots are unoccupied during busy hours,scheduling may be inefficient.

Fault Management


3.11.6 Other NEs

MSs that support dedicated pilots must be used.






Network Impact Report (Compared with V300R003C00) A Terms



50

A Terms

S

Safety zone A zone configured to prevent interference on UL common bands. No

data is transmitted in the safety zone.

P

Prepared handover A handover during which the serving BS notifies the target BS of ahandover and then an MS reenters the network on the target BS.




Network Impact Report (Compared with V300R003C00) B Acronyms and Abbreviations



51

B Acronyms and Abbreviations

A

AMC adaptive modulation and coding

ARQ automatic repeat request

ASN access service network

ASN-GW access service network gateway

B

BBBI BWA baseband processing and radio interface unit

BE best effort

BF beamforming

BS base station

C

CINR carrier-to-interference-and-noise ratio

CSM collaborative spatial Multiplexing

D

DI data integrity

E

EFFR enhanced fractional frequency reuse

ertPS extended real-time polling service







52

F

FFR fractional frequency reuse

G

GPS Global Positioning System

H

HO handover

I

IRC interference rejection combining

L

LTE long term evolution

M

MAC media access control

MCS modulation and coding scheme

MML man-machine language

MIMO multiple-input multiple-output

MPR modulation order product code rate

MS mobile station

N

NI noise index

NWG network working group

P

PHS payload header suppression

PUSC partial usage of subchannels

RRU remote radio unit





S

SDMA space division multiple access

SRD system requirements document

SS subscriber station

T

TDD time division duplex

TLV type/length/value

TTG transmit transition gap

W

WCS WiMAX configuration system

WiMAX World Interoperability for Microwave Access

Documents

Wimax Network Impact Report v3r3c00