Quad Antenna Uplink Performance Package.pdf

Quad Antenna Uplink Performance Package

USER DESCRIPTION

90/1553-HSC 105 50/1-V2 Uen F1

Copyright

Ericsson AB 2011. All rights reserved. No part of this document may bereproduced in any form without the written permission of the copyright owner.

Disclaimer

The contents of this document are subject to revision without notice due tocontinued progress in methodology, design and manufacturing. Ericsson shallhave no liability for any error or damage of any kind resulting from the useof this document.

Trademark List

All trademarks mentioned herein are the property of their respective owners.These are shown in the document Trademark Information.

90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Contents

Contents

1 Introduction 1

1.1 Basic Characteristics 1

1.2 Benefits 1

2 Feature Operation 3

2.1 Network Requirements 3

2.2 Radio Building Block Configurations 3

2.3 Digital Unit Configuration 5

2.4 Receiver Antenna Configuration 5

3 Parameters 7

3.1 Introduced Parameters 7

3.2 Affected Parameters 7

4 Network Impact 9

4.1 Capacity 9

4.2 Coverage 9

5 Associated Features and Affected Functions 11

5.1 Prerequisite Features 11

5.2 Affected Features 11

5.3 Related Features 11

5.4 Affected System Functions 11

6 Performance 13

6.1 KPIs 13

6.2 Counters and Events 13

7 O&M Information 15

90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Introduction

1 Introduction

This document describes the Quad Antenna Uplink Performance Packagefeature.

The Quad Antenna Uplink Performance Package feature provides supportfor four receive antennas used for 4-way receive diversity, to improveuplink coverage, capacity (bit rate) and throughput. Quad Antenna UplinkPerformance is possible for all antenna configurations with four antennas andfor any number of radio units.

1.1 Basic Characteristics

This section describes the basic characteristics of the feature.

Feature Identity

TDD: FAJ 221 1744, Quad Antenna Uplink PerformancePackage

Dependencies

No prerequisite features are required.

No features are affected.

1.2 Benefits

This section describes the benefits of this feature.

The main benefit of Quad Antenna Uplink Performance Package feature isimproved uplink performance, in terms of coverage, capacity (bit rate) andthroughput. The coverage improvements are in the order of 3 dB, dependingon the antenna configuration.

190/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


2 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Feature Operation

2 Feature Operation

This section describes the Quad Antenna Uplink Performance Package featurein more detail, including network configuration requirements and operationflows.

4-way receive diversity supports the same behavior as 2-way receive diversitybut with better performance.

2.1 Network Requirements

The Quad Antenna Uplink Performance Package feature is license controlled.The functionality is switched on when there is a license key. If no featurelicense key is installed, a basic two-way functionality is used.

The following must be fulfilled at feature activation:

Configuration of four receive antenna branches.

Configuration of MOM parameters.

The Quad Antenna Uplink Performance Package feature is a licensedfeature of LTE RAN. A license is needed to activate the feature.

2.2 Radio Building Block Configurations

A Radio Building Block (RBB) defines a unique way of combining Radio Units(RU) or Remote Radio Units (RRU) in one sector with connections to DigitalUnits (DU) and the antenna system.

The following documents provide further information about RBB configurations:

Antenna and RF Connections

RBS Configurations

The following figures show supported RBB configurations for 4-way receivediversity.

390/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


L0000503A

DU

DU

RU

RU

TX/RX

TX/RX

TX/RX

TX/RX

Figure 1 RBB 44 2C, where only two branches are used for Tx and one Txper RU.

If an RfBranch, in configuration RBB 44 2C, is not to be used for Tx, itsRfBranchId must end with the string _NO_TX. The value of parameterRfBranchId is defined using site equipment files during integration. Moreinformation can be found in Configuration Files and Preparing ConfigurationFile Templates.

The following figure shows the RBB installation.

L0000542A

RXA I/O

RXA OUT

RXB I/O

RXA I/O

RXA OUT

RXB I/O

3

RR

U B

RR

U A

DU

1 42

5

6

XXX

TMA

XXX

TMA

Figure 2 RBB 44 2C installation

4 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Feature Operation

2.3 Digital Unit Configuration

A Digital Unit (DU) provides switching, traffic management, timing, basebandprocessing, and radio interfacing.

The Quad Antenna Uplink Performance Package feature is normally configuredwith one DU for a three cells configuration. For Bandwidths more than 10MHzthe Quad Antenna Uplink Performance Package feature can only be configuredwith one DU per sector/cell. A three cells configuration requires three DUs.

The following documents provide further information about the digital unitconfiguration:

Digital Unit Description

Control Channel Dimensioning

2.4 Receiver Antenna Configuration

The following antenna types and configurations can be used for 4-way receivediversity:

Four co-polarized correlated antenna elements

Four co-polarized uncorrelated antenna elements

Two columns of closely spaced cross-polarized antenna elements

Two spatially separated columns of cross-polarized antenna elements

The following figure shows antenna configurations used for 4-way receivediversity.

590/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


L0000543A

Antenna configuration

Four co-polarized correlatedantenna elements

Two columns of closely spacedcross-polarized antenna elements

Two spatially separated columns ofcross-polarized antenna elements

Four co-polarized uncorrelatedantenna elements

1

2

3

4

0.51

0.51

1 2

+45 +45

3 4

1 2 3 4

10

10

1 2

+45 +45

3 4

1 2 3 4

Figure 3 Antenna configurations for 4-way receive diversity

Uncorrelated antennas give, in general, better uplink performance. Fourco-polarized uncorrelated antenna elements and two spatially separatedcolumns of cross-polarized antennas give best performance.

Interference Rejection Combining (IRC) generally improves the performancewhen 4-way Rx diversity is used. With the IRC feature activated, the systemdynamically switches between the combining methods IRC and Maximum RatioCombining (MRC) depending on interference situation. Without an IRC licensekey, MRC is used in all situations.

The following document provides further information about antennaconfigurations:

Antenna System Equipment

6 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Parameters

3 Parameters

This section describes parameters introduced by the Quad Antenna UplinkPerformance Package feature and parameters affected by activating thefeature.

3.1 Introduced Parameters

This section provides a brief description of the parameters introduced by theQuad Antenna Uplink Performance Package feature. Further details relatingto these parameters can be found in Managed Object Model. ManagedObjects (MOs) hold the parameters.

Table 1 describes the parameters introduced by the feature.

Table 1 Introduced Parameters

Parameter Description

QuadAntUlPerfPkgId The value component of the Relative Distinguished Name (RDN).

keyIdQuadAntUlPerfPkg The license key ID for the feature Quad Antenna UplinkPerformance Package.

featureStateQuadAntUlPerfPkg

Activates or deactivates the licensed feature Quad Antenna UplinkPerformance Package. The value of the attribute is irrelevantwhen no valid license key is installed for the feature.

licenseStateQuadAntUlPerfPkg

Indicates the status of the licensed feature Quad Antenna UplinkPerformance Package, ENABLED or DISABLED. The value isENABLED when a license key is installed.

serviceStateQuadAntUlPerfPkg

Indicates whether the feature Quad Antenna Uplink PerformancePackage is operable or inoperable.

3.2 Affected Parameters

Table 2 describes the parameters affected by the feature.

Table 2 Affected Parameters

Parameter Description

noOfRxAntenna The number of antennas that can be used for uplinkbeam-forming/MIMO.(1)

RfBranchId The value of parameter RfBranchId is defined using site equipmentfiles during integration. If an RfBranch is not to be used for Tx, itsRfBranchId must end with the string _NO_TX. More informationcan be found in Configuration Files and Preparing ConfigurationFile Templates.

(1) A parameter value of 0 will result in that the installed licensed controlled feature for multipleantennas defines the configuration, and available resources will be used accordingly. If theparameter value is set to 0 and the feature state (multiple antennas) is Disabled the predefinedvalue for the number of Rx antennas is 2.

790/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


8 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Network Impact

4 Network Impact

This section describes how the Quad Antenna Uplink Performance Packagefeature impacts the network functions and capabilities.

4.1 Capacity

This section provides information on the impact of the feature on networkcapacity.

The Quad Antenna Uplink Performance Package feature increases capacity.The throughput is up to doubled for coverage limited UE.

4.2 Coverage

This section provides information on the impact of the feature on networkcoverage.

The coverage improvements, in terms of link performance gains, are in theorder of 3 dB depending on the antenna configuration.

990/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


10 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Associated Features and Affected Functions

5 Associated Features and AffectedFunctions

This section describes how the Quad Antenna Uplink Performance Packagefeature affects other features and functions.

5.1 Prerequisite Features

There are no prerequisite features for this feature.

5.2 Affected Features

Table 3 lists features that are affected by the Quad Antenna Uplink PerformancePackage feature.

Table 3 Affected Features

Feature Description

Octal Antenna Uplink PerformancePackage

Only one of Quad Antenna Uplink Performance Package andOctal Antenna Uplink Performance Package can be activesimultaneously.

5.3 Related Features

Table 4 lists features that are related to the Quad Antenna Uplink PerformancePackage feature.

Table 4 Related Features

Feature Description

Interference Rejection Combining(IRC)

IRC give further performance gains compared to MRC, whenthere are four receive antennas available.

5.4 Affected System Functions

This feature affects no system functions.

1190/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


12 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

Performance

6 Performance

This section describes performance indicators, counters, and events associatedwith the Quad Antenna Uplink Performance Package feature.

6.1 KPIs

The following key performance indicators are associated with this feature:

UL Throughput Average uplink throughput per UE, on the Packet DataConvergence Protocol level.

6.2 Counters and Events

This feature has no directly associated counters or events.

1390/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30


14 90/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30

O&M Information

7 O&M Information

This section provides Operation and Maintenance (O&M) information for theQuad Antenna Uplink Performance Package feature.

Activating the Quad Antenna Uplink Performance Package feature requiresthat the corresponding license is installed. For more information on handlinglicenses, see the document License Management.

The feature is activated by setting the parameterfeatureStateQuadAntUlPerfPkg to ACTIVATED. The operator can configurethis feature on or off on cell level either directly in the RBS or fromOSS-RC. The operational state of this feature can be checked with theparameterlicenseStateQuadAntUlPerfPkg.

1590/1553-HSC 105 50/1-V2 Uen F1 | 2012-03-30
toc1 Introduction1.1 Basic CharacteristicsDependencies1.2 Benefits2 Feature Operation2.1 Network Requirements2.2 Radio Building Block Configurations2.3 Digital Unit Configuration2.4 Receiver Antenna Configuration3 Parameters3.1 Introduced Parameters3.2 Affected Parameters4 Network Impact4.1 Capacity4.2 Coverage5 Associated Features and Affected Functions5.1 Prerequisite Features5.2 Affected Features5.3 Related Features5.4 Affected System Functions6 Performance 6.1 KPIs6.2 Counters and Events7 O&M Information

Documents

Quad Antenna Uplink Performance Package.pdf