Massive Mimo Optimization In Wttx Scenarios (tdd)(eran15.1_draft A).pdf

eRAN

Massive MIMO Optimization in WTTx Scenarios (TDD) Feature Parameter Description Issue

Draft A

Date

2018-12-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2019. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

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Contents

Contents 1 Change History.............................................................................................................................. 1 1.1 eRAN15.1 Draft A (2018-12-30)................................................................................................................................... 1

2 About This Document.................................................................................................................. 2 2.1 General Statements......................................................................................................................................................... 2 2.2 Applicable RAT.............................................................................................................................................................. 3 2.3 Features in This Document.............................................................................................................................................3

3 WTTx Pairing Enhancement........................................................................................................4 3.1 Principles........................................................................................................................................................................ 4 3.2 Network Analysis........................................................................................................................................................... 4 3.2.1 Benefits........................................................................................................................................................................ 4 3.2.2 Impacts.........................................................................................................................................................................5 3.3 Requirements.................................................................................................................................................................. 5 3.3.1 Licenses....................................................................................................................................................................... 5 3.3.2 Software.......................................................................................................................................................................5 3.3.3 Hardware..................................................................................................................................................................... 6 3.4 Operation and Maintenance............................................................................................................................................7 3.4.1 Data Configuration...................................................................................................................................................... 7 3.4.1.1 Data Preparation....................................................................................................................................................... 7 3.4.1.2 Using MML Commands........................................................................................................................................... 7 3.4.1.3 Using the CME......................................................................................................................................................... 7 3.4.2 Activation Verification................................................................................................................................................ 8 3.4.3 Network Monitoring.................................................................................................................................................... 8

4 SRS Antenna Selection.................................................................................................................9 4.1 Principles........................................................................................................................................................................ 9 4.2 Network Analysis........................................................................................................................................................... 9 4.2.1 Benefits........................................................................................................................................................................ 9 4.2.2 Impacts.........................................................................................................................................................................9 4.3 Requirements................................................................................................................................................................ 10 4.3.1 Licenses..................................................................................................................................................................... 10 4.3.2 Software.....................................................................................................................................................................10 4.3.3 Hardware................................................................................................................................................................... 10 4.4 Operation and Maintenance.......................................................................................................................................... 11 Issue Draft A (2018-12-30)

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Contents

4.4.1 Data Configuration.................................................................................................................................................... 11 4.4.1.1 Data Preparation..................................................................................................................................................... 11 4.4.1.2 Using MML Commands......................................................................................................................................... 11 4.4.1.3 Using the CME....................................................................................................................................................... 11 4.4.2 Activation Verification...............................................................................................................................................11 4.4.3 Network Monitoring.................................................................................................................................................. 13

5 SRS Interference Avoidance......................................................................................................15 5.1 Principles...................................................................................................................................................................... 15 5.2 Network Analysis......................................................................................................................................................... 15 5.2.1 Benefits...................................................................................................................................................................... 15 5.2.2 Impacts.......................................................................................................................................................................16 5.3 Requirements................................................................................................................................................................ 16 5.3.1 Licenses..................................................................................................................................................................... 16 5.3.2 Software.....................................................................................................................................................................16 5.3.3 Hardware................................................................................................................................................................... 18 5.4 Operation and Maintenance..........................................................................................................................................18 5.4.1 Data Configuration.................................................................................................................................................... 18 5.4.1.1 Data Preparation..................................................................................................................................................... 18 5.4.1.2 Using MML Commands......................................................................................................................................... 18 5.4.1.3 Using the CME....................................................................................................................................................... 18 5.4.2 Activation Verification.............................................................................................................................................. 18 5.4.3 Network Monitoring.................................................................................................................................................. 18

6 Parameters..................................................................................................................................... 20 7 Counters........................................................................................................................................ 21 8 Glossary......................................................................................................................................... 22 9 Reference Documents................................................................................................................. 23

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1 Change History

1

Change History

This chapter describes changes not included in the "Parameters", "Counters", "Glossary", and "Reference Documents" chapters. These changes include: l

Technical changes Changes in functions and their corresponding parameters

l

Editorial changes Improvements or revisions to the documentation

1.1 eRAN15.1 Draft A (2018-12-30) This is the first release of this document.

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2 About This Document

About This Document

2.1 General Statements Purpose This document is intended to acquaint readers with: l

The technical principles of features and their related parameters

l

The scenarios where these features are used, the benefits they provide, and the impact they have on networks and functions

l

Requirements of the operating environment that must be met before feature activation

l

Parameter configuration required for feature activation, verification of feature activation, and monitoring of feature performance NOTE

This document only provides guidance for feature activation. Feature deployment and feature gains depend on the specifics of the network scenario where the feature is deployed. To achieve the desired gains, contact Huawei professional service engineers.

Software Interfaces Any parameters, alarms, counters, or managed objects (MOs) described in this document apply only to the corresponding software release. For future software releases, refer to the corresponding updated product documentation.

Trial Features Trial features are features that are not yet ready for full commercial release for certain reasons. For example, the industry chain (terminals/CN) may not be sufficiently compatible. However, these features can still be used for testing purposes or commercial network trials. Anyone who desires to use the trial features shall contact Huawei and enter into a memorandum of understanding (MoU) with Huawei prior to an official application of such trial features. Trial features are not for sale in the current version but customers may try them for free. Customers acknowledge and undertake that trial features may have a certain degree of risk due to absence of commercial testing. Before using them, customers shall fully understand not Issue Draft A (2018-12-30)

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only the expected benefits of such trial features but also the possible impact they may exert on the network. In addition, customers acknowledge and undertake that since trial features are free, Huawei is not liable for any trial feature malfunctions or any losses incurred by using the trial features. Huawei does not promise that problems with trial features will be resolved in the current version. Huawei reserves the rights to convert trial features into commercial features in later R/C versions. If trial features are converted into commercial features in a later version, customers shall pay a licensing fee to obtain the relevant licenses prior to using the said commercial features. If a customer fails to purchase such a license, the trial feature(s) will be invalidated automatically when the product is upgraded.

Feature Differences Between RATs The feature difference section only describes differences in switches or principles. Unless otherwise stated, descriptions in this document apply to all RATs. If a description does not apply to all RATs, the specific RAT that it does apply to will be stated. For example, in the statement "TDD cells are compatible with enhanced MU-MIMO", "TDD cells" indicates that this function cannot be used in non-TDD cells.

2.2 Applicable RAT This document applies to TDD.

2.3 Features in This Document This document describes the following TDD features. Feature ID

Feature Name

Section

TDLEOFD-15 0602

WTTx Pairing Enhancement

3 WTTx Pairing Enhancement

TDLEOFD-15 1608

SRS Antenna Selection in Massive MIMO

4 SRS Antenna Selection

TDLEOFD-15 1609

SRS Interference Avoidance

5 SRS Interference Avoidance

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3 WTTx Pairing Enhancement

WTTx Pairing Enhancement

This section describes TDLEOFD-150602 WTTx Pairing Enhancement.

3.1 Principles This feature optimizes the multi-user pairing procedure in wireless to the x (WTTx) scenarios. When UEs are paired in the downlink, the eNodeB preferentially selects UEs with small pairing losses for pairing and adaptively adjusts the optimal number of pairing layers based on information such as the pre-pairing MCS index and pairing loss. Customer premise equipment (CPE) locations are fixed and channel conditions are stable. This feature improves the MCS index selection accuracy in the pairing process, improving the downlink spectral efficiency and average downlink cell throughput. This feature is controlled by the PRECISE_PAIRING_OPT_SW option under the CellMMAlgo.PreciseMubfOptSwitch parameter.

3.2 Network Analysis 3.2.1 Benefits This function improves downlink spectral efficiency and average downlink cell throughput. It is suitable only for massive MIMO networks where WTTx services are provided. This feature applies to the following scenarios: l

The CQI value is greater than or equal to 12.

l

Traffic is distributed in a centralized manner. The call history record (CHR) monitoring item PERIOD_PRIVATE_BEAM_TRAFFIC can be used to verify traffic distributions. If 80% of downlink service traffic is concentrated in four beam directions and more than 20% of traffic is generated in at least one beam direction, UE services are distributed in a centralized manner. Beams in different polarization directions may be combined, for example, beams 0 and 32 may be considered as one beam direction.

l

The load is heavy if the downlink PRB usage is greater than 70% and the number of activated downlink UEs is greater than 15.

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In addition, after WTTx UE identification is configured, a few gains can be additionally obtained. NOTE

l Downlink spectral efficiency = L.Thrp.bits.DL/(L.Cell.DL.PDSCH.Tti.Num x L.ChMeas.PRB.DL.DrbUsed.Avg) l Average downlink cell throughput = L.Thrp.bits.DL/L.Thrp.Time.Cell.DL.HighPrecision

3.2.2 Impacts Network Impacts l

This feature improves the downlink spectral efficiency and average downlink cell throughput.

l

The downlink Initial BLock Error Rate (IBLER) and Residual BLock Error Rate (RBLER) may slightly increase.

l

If there are many UEs near the cell center, the IBLER may decrease.

Function Impacts None

3.3 Requirements 3.3.1 Licenses Feature ID

Feature Name

Model

Sales Unit

TDLEOFD-150602

WTTx Pairing Enhancement

LT4SMMDLCE00

Per Cell

3.3.2 Software Prerequisite Functions Function Name

Function Switch

Reference

Massive MIMO introduction

N/A

Massive MIMO (TDD)

Mutually Exclusive Functions None

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3.3.3 Hardware Base Station Models 3900 and 5900 series base stations

Boards l

BBU: BBU3910 or BBU5900

l

BBPs

l

–

UBBPem

–

UBBPf1

–

UBBPf3

–

UBBPfw1 (only available in the BBU5900)

Main control board: UMPTe NOTE

For details about the maximum number of BBPs supported by each BBU and the maximum number of massive MIMO cells supported by each BBP, see the hardware description of the corresponding BBU.

RF Modules l

AAU5271

l

AAU5281

l

AAU5613 (compatible only with the UBBPfw1 and UBBPf3)

Cells The following table describes the frequency, cell bandwidth, and subframe configurations supported by each RF module. NOTE

l The UBBPf1, UBBPf3, or UBBPfw1 does not support uplink-downlink subframe configuration 1. l Special subframe configuration 5 can be used only with uplink-downlink subframe configuration 2, not with uplink-downlink subframe configuration 1.

RF Module

Frequency

Cell Bandwidth

UplinkDownlink Subframe Configuration

Special Subframe Configuration

AAU5271

2.3 GHz (2300 MHz to 2400 MHz)

10 MHz, 15 MHz, and 20 MHz

1 or 2

5 or 7

AAU5271

2.3 GHz (2350 MHz to 2390 MHz)

10 MHz, 15 MHz, and 20 MHz

1 or 2

5 or 7

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RF Module

Frequency

Cell Bandwidth

UplinkDownlink Subframe Configuration

Special Subframe Configuration

AAU5271

2.6 GHz (2496 MHz to 2690 MHz)

10 MHz, 15 MHz, and 20 MHz

1 or 2

5 or 7

AAU5271

2.6 GHz (2560 MHz to 2615 MHz)

10 MHz, 15 MHz, and 20 MHz

1 or 2

5 or 7

AAU5281

3.5 GHz (3445 MHz to 3600 MHz)

10 MHz, 15 MHz, and 20 MHz

1 or 2

5 or 7

AAU5613 (compatible only with the UBBPfw1 and UBBPf3)

3400 MHz to 3600 MHz

10 MHz, 15 MHz, and 20 MHz

2

5 or 7

3600 MHz to 3800 MHz

3.4 Operation and Maintenance 3.4.1 Data Configuration 3.4.1.1 Data Preparation Parameter Name

Parameter ID

Setting Notes

Precise MUBF Optimization Switch

CellMMAlgo.PreciseMubf OptSwitch

Select the PRECISE_PAIRING_OP T_SW option.

3.4.1.2 Using MML Commands Activation Command Examples MOD CELLMMALGO: LocalCellId=0, PreciseMubfOptSwitch=PRECISE_PAIRING_OPT_SW-1;

Deactivation Command Examples MOD CELLMMALGO: LocalCellId=0, PreciseMubfOptSwitch=PRECISE_PAIRING_OPT_SW-0;

3.4.1.3 Using the CME For detailed operations, see CME-based Feature Configuration. Issue Draft A (2018-12-30)

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3.4.2 Activation Verification Run the LST CELLMMALGO command to query the setting of the PRECISE_PAIRING_OPT_SW option under the Precise MUBF Optimization Switch parameter. If PRECISE_PAIRING_OPT_SW:On is displayed, this feature has been enabled.

3.4.3 Network Monitoring Counter ID

Counter Name

Description

1526728261

L.Thrp.bits.DL

Total volume of downlink data transmitted at the PDCP layer in a cell

1526730558

L.Cell.DL.PDSCH.Tti.Num

Total number of uplink and downlink TTIs

1526728763

L.ChMeas.PRB.DL.DrbUsed.Av g

Average number of PRBs used by PDSCH DRBs

1526728997

L.Thrp.Time.Cell.DL.HighPreci sion

Total duration of downlink data transmission in a cell (with the precision of 1 ms)

l

Downlink spectral efficiency = L.Thrp.bits.DL/(L.Cell.DL.PDSCH.Tti.Num x L.ChMeas.PRB.DL.DrbUsed.Avg)

l

Average downlink cell throughput = L.Thrp.bits.DL/ L.Thrp.Time.Cell.DL.HighPrecision

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4 SRS Antenna Selection

SRS Antenna Selection

This chapter describes TDLEOFD-151608 SRS Antenna Selection in Massive MIMO.

4.1 Principles This function is controlled by the MM_ANT_SEL_ENH_SWITCH option under the CellMMAlgo.MMAlgoOptSwitch parameter. When this option is selected: 1.

The UE reports its 4-antenna selective transmission capability to the massive MIMO cell through device-pipe coordination signaling.

2.

The massive MIMO cell identifies the WTTx UEs that support 4-antenna selective transmission by using specified user coordinated scheduling, obtains uplink channel information, and then performs 4-antenna selective transmission for such UEs.

4.2 Network Analysis 4.2.1 Benefits The downlink spectral efficiency of UEs capable of 4-antenna selective transmission is greater than that of normal UEs incapable of transmit antenna selection or that of UEs capable of 2-antenna selective transmission when the penetration rate of UEs capable of 4-antenna selective transmission is 100%, UEs are evenly distributed, and TM8 is fixedly used.

4.2.2 Impacts Network Impacts This feature increases the proportion of dual-stream beamforming and the MCS index, and improves user experience when there are UEs capable of 4-antenna selective transmission in a massive MIMO cell.

Function Impacts None Issue Draft A (2018-12-30)

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4.3 Requirements 4.3.1 Licenses Feature ID

Feature Name

Model

Sales Unit

TDLEOFD-151608

SRS Antenna Selection in Massive MIMO

LT4SSRSASTDD

Per Cell

Function Name

Function Switch

Reference

Description

3D beamforming

BfSwitch option under the CellAlgoSwitch.Bf AlgoSwitch parameter

Massive MIMO (TDD)

None

Device-pipe identification

SpecUeIdentifySwi tch option under the UeCooperationPar a.SpecUserCooperat ionSwitch parameter

Specified User Coordinated Scheduling

None

Antenna selection for SRS transmission

UeSRSAntSelectCt rlSwitch option under the ENodeBAlgoSwitc h.CompatibilityCtrl Switch parameter

None

SRS antenna selection requires that the UeSRSAntSelectCt rlSwitch option be deselected so that the eNodeB supports SRS transmit antenna selection.

4.3.2 Software Prerequisite Functions

Mutually Exclusive Functions None

4.3.3 Hardware For details, see 5.3.3 Hardware. The BBP must be a UBBPf1, UBBPfw1, or UBBPf3. Issue Draft A (2018-12-30)

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4.4 Operation and Maintenance 4.4.1 Data Configuration 4.4.1.1 Data Preparation Parameter Name

Parameter ID

Setting Notes

Massive MIMO Algorithm Optimization Switch

CellMMAlgo.MMAlgoOpt Switch

Select the MM_ANT_SEL_ENH_S WITCH option.

Specified User Cooperation Switch

UeCooperationPara.SpecU serCooperationSwitch

Select the SpecUeIdentifySwitch option.

Compatibility Control Switch

ENodeBAlgoSwitch.Comp atibilityCtrlSwitch

Deselect the UeSRSAntSelectCtrlSwitch option.

4.4.1.2 Using MML Commands Activation Command Examples MOD ENODEBALGOSWITCH: CompatibilityCtrlSwitch=UeSRSAntSelectCtrlSwitch-0; MOD UECOOPERATIONPARA: LocalCellId=0, SpecUserCooperationSwitch=SpecUeIdentifySwitch-1; MOD CELLMMALGO: LocalCellId=0, MMAlgoOptSwitch=MM_ANT_SEL_ENH_SWITCH-1;

Deactivation Command Examples //Disabling SRS antenna selection MOD CELLMMALGO: LocalCellId=0, MMAlgoOptSwitch=MM_ANT_SEL_ENH_SWITCH-0; //Restoring the settings of CompatibilityCtrlSwitch and SpecUserCooperationSwitch. The following parameter settings are used as examples. MOD ENODEBALGOSWITCH: CompatibilityCtrlSwitch=UeSRSAntSelectCtrlSwitch-1; MOD UECOOPERATIONPARA: LocalCellId=0, SpecUserCooperationSwitch=SpecUeIdentifySwitch-0;

4.4.1.3 Using the CME For detailed operations, see CME-based Feature Configuration.

4.4.2 Activation Verification Step 1 Run the LST CELLMMALGO command. If MM_ANT_SEL_ENH_SWITCH:On is displayed under the Massive MIMO Algorithm Optimization Switch parameter, this feature has been enabled. Step 2 On the U2020, start a Uu interface tracing task and then check the RRC_HPS_UE_CAP_INFO and RRC_HPS_RECFG messages. Issue Draft A (2018-12-30)

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If the value of support-FourAntennasSRSSwitching in the RRC_HPS_UE_CAP_INFO message is "supported" (as shown in Figure 4-1) and the value of fourAntennasSRSSwitchingMode in the RRC_HPS_RECFG message is "enabled" (as shown in Figure 4-2), this feature has taken effect. Figure 4-1 RRC_HPS_UE_CAP_INFO message

Figure 4-2 RRC_HPS_RECFG message

----End

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4.4.3 Network Monitoring Counter ID

Counter Name

Counter Description

1526727393

L.ChMeas.MIMO.PRB.OL.Ran k1

Total number of used downlink PRBs in open-loop rank 1 mode

1526727394

L.ChMeas.MIMO.PRB.OL.Ran k2

Total number of used downlink PRBs in open-loop rank 2 mode

1526728881

L.ChMeas.BF.PRB.OL.Rank1

Total number of used downlink PRBs in beamforming rank 1 mode.

1526728882

L.ChMeas.BF.PRB.OL.Rank2

Total number of used downlink PRBs in beamforming rank 2 mode

1526737832

L.Traffic.DL.SCH.TB.TM2.bits

Number of bits transmitted in the downlink in TM2

1526737833

L.Traffic.DL.SCH.TB.TM3.bits

Number of bits transmitted in the downlink in TM3

1526737837

L.Traffic.DL.SCH.TB.TM7.bits

Number of bits transmitted in the downlink in TM7

1526737838

L.Traffic.DL.SCH.TB.TM8.bits

Number of bits transmitted in the downlink in TM8

1526737840

L.ChMeas.PRB.TM2

Total number of used downlink PRBs in TM2

1526737841

L.ChMeas.PRB.TM3

Total number of used downlink PRBs in TM3

1526737845

L.ChMeas.PRB.TM7

Total number of used downlink PRBs in TM7.

1526737846

L.ChMeas.PRB.TM8

Total number of used downlink PRBs in TM8

1526745761

L.Traffic.User.UECooperation.A vg

Average number of UEs supporting device-pipe synergy in a cell

1526746696

L.Thrp.bits.DL.UECooperation

Total traffic volume of downlink PDCP PDUs transmitted by device-pipe synergy UEs in a cell

1526746697

L.ChMeas.PRB.DL.DrbUsed.Av g.UECooperation

Average number of downlink PRBs used by DRBs on the PDSCH for device-pipe synergy UEs

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Counter ID

Counter Name

Counter Description

1526728261

L.Thrp.bits.DL

Total volume of downlink data transmitted at the PDCP layer in a cell

1526728763

L.ChMeas.PRB.DL.DrbUsed.Av g

Average number of PRBs used by PDSCH DRBs

1526728997

L.Thrp.Time.Cell.DL.HighPreci sion

Total duration of downlink data transmission in a cell (with the precision of 1 ms)

1526730558

L.Cell.DL.PDSCH.Tti.Num

Total number of TTIs on the PDSCH

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5 SRS Interference Avoidance

SRS Interference Avoidance

This section describes TDLEOFD-151609 SRS Interference Avoidance.

5.1 Principles This feature adjusts the time-frequency resource position of SRSs and uses the last symbol in an uplink subframe for SRS transmission. In this way, the UEs in the serving cell and neighboring cells send SRSs at different time to avoid the SRS interference from neighboring cells. In addition, the SRS period is prolonged to reduce the SRS resource usage of a single UE. In this case, the probability of SRS resource conflicts is reduced without affecting the performance, and the SRS interference of neighboring cells to the massive MIMO cell is reduced, improving the downlink spectral efficiency of massive MIMO cells. This function is controlled by the WTTxSRSIntrfAvoidanceSw option under the SRSCfg.SrsCfgPolicySwitch parameter.

5.2 Network Analysis 5.2.1 Benefits This feature is suitable when both of the following conditions are met: l

A WTTx network is set up or WTTx UEs account for more than 80% of UEs in WTTx +MBB hybrid networking scenarios.

l

The interference of neighboring cells to massive MIMO cells where this feature is enabled is severe. The measured value of the L.UpPTS.Interference.Avg counter is greater than -118 dB and the ratio of cells with the SRS SINR less than -8 dB is greater than 15%.

In the preceding scenarios, this feature improves MU beamforming performance and the downlink cell spectral efficiency.

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5.2.2 Impacts Network Impacts l

Enabling this feature will reestablish the cell.

l

The last symbol in an uplink subframe is used for SRS transmission. Therefore, there is one OFDM symbol in the uplink subframe unavailable for PUSCH transmission, decreasing the uplink MCS index and spectral efficiency. In specific scenarios, the uplink throughput and UE-perceived rate may be affected.

l

The last symbol in an uplink subframe is used for SRS transmission. The PUCCHrelated algorithms have been optimized. In specific scenarios, PUCCH interference may slightly increase.

Function Impacts None

5.3 Requirements 5.3.1 Licenses Feature ID

Feature Name

Model

Sales Unit

TDLEOFD-151609

SRS Interference Avoidance

LT4SSRSIATDD

Per Cell

5.3.2 Software Prerequisite Functions Function Name

Function Switch

Reference

Massive MIMO introduction

N/A

Massive MIMO (TDD)

Subframe configuration

Cell.SubframeAssignment set to SA2

Subframe Configuration (TDD)

SRS resource management

SRSCfg.SrsCfgInd set to BOOLEAN_TRUE

Physical Channel Resource Management

TDD SRS configuration mode

SRSCfg.TddSrsCfgMode set to ACCESS_ENHANCED

None

Preamble format

Cell.PreambleFmt set to 0

Random Access Control

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Mutually Exclusive Functions Function Name

Function Switch

Reference

Downlink 3CC aggregation

CaDl3CCSwitch option under the CaMgtCfg.CellCaAlgoSwit ch parameter

Carrier Aggregation

Flexible PUCCH configuration

PucchFlexCfgSwitch option under the CellAlgoSwitch.PucchAlgo Switch parameter

Physical Channel Resource Management

Inter-frequency split

None

Soft Split Resource Duplex (TDD)

Intra-frequency split

None

Soft Split Resource Duplex (TDD)

eMTC introduction

EMTC_SWITCH option under the CellEmtcAlgo.EmtcAlgoS witch parameter

eMTC

Intra-cell D-MIMO

DmimoJTSwitch option under the CellAlgoSwitch.DMIMOAl goSwitch parameter

D-MIMO (TDD)

Inter-cell D-MIMO

InterCellDmimoJTSwitch option under the CellAlgoSwitch.DMIMOAl goSwitch parameter

D-MIMO (TDD)

DL CoMP cell

IntraDlCompSwitch option under the CellAlgoSwitch.DlCompSw itch parameter

DL CoMP (TDD)

Intra-eNodeB UL CAMC

UlCamcSw option under the CellAlgoSwitch.CamcSwitc h parameter

Uplink Coordinated Scheduling

Inter-eNodeB UL CAMC

UlInterEnbCamcSw option of the CellAlgoSwitch.CamcSwitc h parameter

Uplink Coordinated Scheduling

Atmospheric duct interference suppression

REMOTE_INTERF_BF_ ENH_SW option under the UlInterfSuppressCfg.Remo teIntrfDlEnhSwitch parameter

Interference Detection and Suppression

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5 SRS Interference Avoidance

5.3.3 Hardware For details, see 3.3.3 Hardware.

5.4 Operation and Maintenance 5.4.1 Data Configuration 5.4.1.1 Data Preparation Parameter Name

Parameter ID

Setting Notes

SRS Configure Policy Switch

SRSCfg.SrsCfgPolicySwitc h

Select the WTTxSRSIntrfAvoidanceSw option.

TDD SRS configuration mode

SRSCfg.TddSrsCfgMode

Set this parameter to ACCESS_ENHANCED.

SRS Configuration Indicator

SRSCfg.TddSrsCfgMode

Set this parameter to BOOLEAN_TRUE.

Preamble format

Cell.PreambleFmt

Set this parameter to 0.

5.4.1.2 Using MML Commands Activation Command Examples MOD CELL: LocalCellId=0, PreambleFmt=0; MOD SRSCFG: LocalCellId=0, TddSrsCfgMode=ACCESS_ENHANCED, SrsCfgInd=BOOLEAN_TRUE, SrsCfgPolicySwitch=WTTxSRSIntrfAvoidanceSw-1;

Deactivation Command Examples MOD SRSCFG: LocalCellId=0, SrsCfgPolicySwitch=WTTxSRSIntrfAvoidanceSw-0;

5.4.1.3 Using the CME For detailed operations, see CME-based Feature Configuration.

5.4.2 Activation Verification Run the LST SRSCFG command. If WTTxSRSIntrfAvoidanceSw:On is displayed under the SRS Configure Policy Switch parameter, SRS interference avoidance has been enabled.

5.4.3 Network Monitoring Counter ID

Counter Name

Counter Description

1526728769

L.UpPTS.Interference.Avg

Average UpPTS interference value

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eRAN Massive MIMO Optimization in WTTx Scenarios (TDD) Feature Parameter Description

5 SRS Interference Avoidance

Counter ID

Counter Name

Counter Description

1526748696

L.UL.SINR.SRS.Index0

Number of SRS SINR samples in range 0

1526748697

L.UL.SINR.SRS.Index1

Number of SRS SINR samples in range 1

1526748698

L.UL.SINR.SRS.Index2

Number of SRS SINR samples in range 2

1526748699

L.UL.SINR.SRS.Index3

Number of SRS SINR samples in range 3

1526748700

L.UL.SINR.SRS.Index4

Number of SRS SINR samples in range 4

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eRAN Massive MIMO Optimization in WTTx Scenarios (TDD) Feature Parameter Description

6 Parameters

6

Parameters

The following hyperlinked EXCEL files of parameter reference match the software version with which this document is released. l

Node Parameter Reference: contains device and transport parameters.

l

eNodeBFunction Parameter Reference: contains all parameters related to radio access functions, including air interface management, access control, mobility control, and radio resource management. NOTE

You can find the EXCEL files of parameter reference for the software version on the live network from the product documentation delivered with that version.

FAQ: How do I find the parameters related to a certain feature from parameter reference? Step 1 Open the EXCEL file of parameter reference. Step 2 On the Parameter List sheet, filter the Feature ID column. Click Text Filters and choose Contains. Enter the feature ID, for example, LOFD-001016 or TDLOFD-001016. Step 3 Click OK. All parameters related to the feature are displayed. ----End

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eRAN Massive MIMO Optimization in WTTx Scenarios (TDD) Feature Parameter Description

7 Counters

7

Counters

The following hyperlinked EXCEL files of performance counter reference match the software version with which this document is released. l

Node Performance Counter Summary: contains device and transport counters.

l

eNodeBFunction Performance Counter Summary: contains all counters related to radio access functions, including air interface management, access control, mobility control, and radio resource management. NOTE

You can find the EXCEL files of performance counter reference for the software version used on the live network from the product documentation delivered with that version.

FAQ: How do I find the counters related to a certain feature from performance counter reference? Step 1 Open the EXCEL file of performance counter reference. Step 2 On the Counter Summary(En) sheet, filter the Feature ID column. Click Text Filters and choose Contains. Enter the feature ID, for example, LOFD-001016 or TDLOFD-001016. Step 3 Click OK. All counters related to the feature are displayed. ----End

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eRAN Massive MIMO Optimization in WTTx Scenarios (TDD) Feature Parameter Description

8 Glossary

8

Glossary

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

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eRAN Massive MIMO Optimization in WTTx Scenarios (TDD) Feature Parameter Description

9

9 Reference Documents

Reference Documents

1.

DL CoMP (TDD)

2.

D-MIMO (TDD)

3.

eMTC

4.

Massive MIMO (TDD)

5.

Specified User Coordinated Scheduling

6.

Soft Split Resource Duplex (TDD)

7.

Uplink Coordinated Scheduling

8.

Random Access Control

9.

Carrier Aggregation

10. Subframe Configuration (TDD) 11. Physical Channel Resource Management

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