eNodeB Feature-Description PACKAGE 4.0.pdf

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Samsung eNB (LTE)

Feature Description

for PKG 5.0.0

Provides the Feature ID, dependency & limitation, and detailed description from the point of view of high level design.

Document Version 2.0

December 2015

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All Rights Reserved. No part of this document may be photocopied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means whether, electronic, mechanical, or otherwise without the prior written permission of SAMSUNG Electronics Co., Ltd.

No warranty of accuracy is given concerning the contents of the information contained in this publication. To the extent permitted by law no liability (including liability to any person by reason of negligence) will be accepted by SAMSUNG Electronics Co., Ltd., its subsidiaries or employees for any direct or indirect loss or damage caused by omissions from or inaccuracies in this document. SAMSUNG Electronics Co., Ltd. reserves the right to change details in this publication without notice.

SNMTC-v3-0312 This manual should be read and used as a guideline for properly installing and/or operating the product. Owing to product variations across the range, any illustrations and photographs used in this manual may not be a wholly accurate depiction of the actual products you are using. This manual may be changed for system improvement, standardization and other technical

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Preface

This document provides detailed descriptions of new/enhanced features in the PKG 5.0.0 software release.

Some features, commands, parameters, or counters are not supported by all software releases or approved for all markets.

Relevance

This manual applies to the following products/software.

Name Type

PKG 5.0.0 Software

Conventions in this Document

Samsung Networks product documentation uses the following conventions.

Symbols

Symbol Description Indicates a task.

Indicates a shortcut or an alternative method. Provides additional information.

Provides information or instructions that you should follow to avoid service failure or damage to equipment.

Provides information or instructions that you should follow to avoid personal injury or fatality.

Provides antistatic precautions that you should observe.

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File Names and Paths

These are indicated by a bold typeface. For example:

Copy filename.ext into the /home/folder1/folder2/bin/ folder.

User Input and Console Screen Output Text

Input and output text is presented in the Courier font. For example, context <designated epc-context-name>

CLI commands are presented in bold small caps. For example, Type the RTRV-NE-STS command in the input field.

New and Changed Information

This section describes information that has been added/changed since the previous publication of this manual.



In this document release, LTE-SW5001, Multi-PLMN Support feature is newly added and the contents of LTE-ME5110, FDD Carrier Aggregation (5+5) feature and LTE-ME3203, Aperiodic CQI Reporting feature are enhanced compared to Samsung eNB (LTE) Feature Description for PKG 5.0.0 Ver.

1.0.



The following table shows new and enhanced features for PKG 5.0.0 compared to PKG 4.0.0.

Development Type Feature ID, Name

New features LTE-ME2019, DL SU 2x2 MIMO (TM3 and TM4)

LTE-ME2020, Rx Diversity

LTE-ME2022, DL SU 4x4 MIMO (TM3 and TM4)

LTE-ME2023, DL SU 4x2 MIMO (TM3 and TM4)

LTE-ME5110, FDD Carrier Aggregation(5+5)

LTE-SW0111, UE Counting per Category

LTE-SW0114, Enhancements for Diverse Data Applications

LTE-SW0315, Extended Access Barring (SIB14)

LTE-SW3010, PDCP Sublayer Support

LTE-SW5500, CA Call Control

LTE-SW2004, Blind Offloading to WCDMA

LTE-SW2020, Load Distribution over Backhaul Links

LTE-SW2103, UL Congestion Prevention

LTE-SW2108, Smart Congestion Mitigation

LTE-SW1202, PS Handover between LTE and UTRAN

LTE-SW1204, Redirection to UTRAN without SI

LTE-SW1205, Redirection to UTRAN with SI

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LTE-SW1209, CSFB to UTRAN with PS Handover

LTE-SW1302, PS Handover between LTE and GERAN

LTE-SW1304, Cell Change Order to GERAN without NACC

LTE-SW1305, Cell Change Order to GERAN with NACC

LTE-SW1306, Redirection to GERAN without SI

LTE-SW1307, Redirection to GERAN with SI

LTE-SW1310, CSFB to GERAN with Redirection with SI

LTE-SW1311, CSFB to GERAN with CCO without NACC

LTE-SW1312, CSFB to GERAN with CCO with NACC

LTE-SW1313, CSFB to GERAN with PS Handover

LTE-SW2011, Service based Intra-LTE Handover

LTE-SW5001, Multi-PLMN Support

LTE-ME3203, Aperiodic CQI Reporting

LTE-ME3206, Periodic Channel Status Reporting

LTE-ME3307, UL Sub-frame Bundling

LTE-ME3309, Resource allocation enhancement for SIB

LTE-ME3503, CFI-based PUSCH adaptation

LTE-ME0102, FDD 3MHz Bandwidth

LTE-ME0201, Frame Structure Type 1 (FDD)

LTE-SO0802, Cell On/Off in Multi-carrier Sites

LTE-SO0804, DL MIMO TX Branch On/Off

LTE-SO2032, Antenna tilt optimization(Cell outage compensation)

LTE-SO2041, New cell site recommendation

LTE-SV0404, VoLTE Quality Enhancement

LTE-SV0504, eMBMS Resource Allocation

LTE-SV0514, Adaptive Delay Reduction for eMBMS

LTE-SV0517, eMBMS Service Restoration

LTE-SV1100, TCP Optimization

LTE-OM9010, VoLTE Monitoring

LTE-OM9100, Key Performance Indexes

LTE-OM9101, L1 and L2 Counters Enhanced features LTE-ME6004, DL Smart

LTE-ME6005, UL Smart (Interference Coordination for UL)

LTE-SW0321, UE Context Management

LTE-SW0322, E-RAB Management

LTE-SW0501, S1 Interface Management

LTE-SW0510, Geo Redundancy of MME

LTE-SW0521, X2 Interface Management

LTE-SW4101, Capacity based Call Admission Control

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LTE-SO0201, Intra-LTE ANR

LTE-SO0301, PCI AutoConfiguration

LTE-SO0401, RACH optimization

LTE-SO0602, Cell Outage Compensation

LTE-SO0702, Coverage and Capacity Optimization

LTE-SO0901, Minimization Drive Test Optimization

LTE-SO2011, Drive test optimization (Coverage and Capacity optimization)

LTE-SO2021, Tx Power Control(Coverage and Capacity optimization)

LTE-SO2031, Antenna tilt optimization(Coverage and Capacity Optimization)

LTE-SV0303, OTDOA

LTE-SV0503, Multicell and Multicast Coordination (MCE)

LTE-SV0515, eMBMS Session Monitoring

LTE-OM9001, Cell Traffic Trace

LTE-OM9002, Subscriber and Equipment Trace

LTE-OM9004, CSL(Call Summary Log) Report

Revision History

The following table lists all versions of this document. Document Number Product/Software

Version

Document Version

Publication Date Remarks 2600-00GAR0GAP PKG 3.0.0 1.0 2 February 2014 - 2600-00GAR0GAP PKG 3.0.0 2.0 4 February 2015 - 2600-00GM80GAP PKG 3.1.0 1.0 26 June 2014 - 2600-00GM80GAP PKG 3.1.0 2.0 9 April 2015 - 2600-00GXYAGAP PKG 4.0.0 1.0 20 Oct 2014 - 2600-00GXYAGAP PKG 4.0.0 2.0 14 January 2015 - 2600-00I10TGAP PKG 5.0.0 1.0 29 July 2015 - 2600-00I10TGAP PKG 5.0.0 2.0 4 December 2015 -

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Organization of This Document

Section Title Description

Chapter 1 Air Performance Enhancement This chapter describes PKG 5.0.0 LTE features related to Air Performance Enhancement. Chapter 2 Call Control This chapter describes PKG 5.0.0 LTE features

related to Call Control.

Chapter 3 Load Control This chapter describes PKG 5.0.0 LTE features related to Load Control.

Chapter 4 Mobility Control This chapter describes PKG 5.0.0 LTE features related to Mobility Control.

Chapter 5 Radio Scheduler This chapter describes PKG 5.0.0 LTE features related to Radio Scheduler.

Chapter 6 Radio Transmission This chapter describes PKG 5.0.0 LTE features related to Radio Transmission.

Chapter 7 Services This chapter describes PKG 5.0.0 LTE features related to Services.

Chapter 8 RAN Sharing This chapter describes PKG 5.0.0 LTE features related to RAN Sharing.

Chapter 9 SON This chapter describes PKG 5.0.0 LTE features related to SON.

Chapter 10 System Test and Analysis This chapter describes PKG 5.0.0 LTE features related to System Test and Analysis.



Samsung eNB (OAM) Feature Description for PKG 5.0.0



Samsung eNB (Transport) Feature Description for PKG 5.0.0



Samsung LTE eNB Command Reference for PKG 5.0.0

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Chapter 1 Air Performance

Enhancement

LTE-ME2019, DL SU 2x2 MIMO (TM3 and TM4)

INTRODUCTION

Multiple antenna techniques aim to improve data robustness or provide an increase in data rates by utilizing special signal structure and exploiting un-correlated fading channels for each transmitted signal. In case of two transmit antennas on an eNB and two receive antennas on the same UE- it is known downlink 2x2 single-user MIMO. The following figure shows concept of single single-user MIMO using m transmit and n receive antennas.

As shown in the figure above, each receiver side antenna receives a composite signal made up of transmitted signals modified by their channels. Under specific channel conditions, the transmitter can structure the transmitted signals to, either send modified copies of the same transmission (transmit diversity) or, send different transmission (spatial multiplexing).

The former case provides signal robustness and the latter provides increase in data rate.

BENEFIT



Provide improvement in cell capacity and throughput as UEs with better channel conditions can benefit from the multiple streams transmission.



Served the improved throughput or reliable communication due to the multiple streams transmission.

DEPENDENCY AND LIMITATION

Dependency

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

2T RRU is required.

FEATURE DESCRIPTION

Samsung supports DL SU-MIMO Spatial Multiplexing (SM) in both Transmission Mode 3 (TM3: open-loop SM) and Transmission Mode 4 (TM4: closed-loop SM) employing either 2x2 antenna configuration that is 2 transmit eNB antennas and 2 receive UE antennas.

Transmit Diversity

Transmit diversity is default MIMO mode in LTE. This redundancy leads to increase in signal-to-noise ratio and therefore, signal robustness. Transmission Mode 2 provides transmit diversity by transmitting a single PDSCH codeword using four antennas.

Spatial Multiplexing

In spatial multiplexing, there is no signal redundancy as with transmit diversity; antenna ports transmit different symbols. There are two modes that can provide spatial diversity; such as TM3 and TM4. TM3 uses a predetermined CDD-based precoding and favorable to high speed UEs. TM4 uses a codebook-based precoding and favorable to low speed UEs because scheduler adopts the best precoder per UE based on the precoder fed-back by UE. For both TM3 and TM4, rank adaptation based on fed-back rank information is supported so that the most appropriate number of transmission layers (and codewords) can be adopted. Mode Description Antenna Ports Layer Codewords Channel Rank UE Feedback TM3 Open loop spatial

multiplexing with cyclic delay diversity

2 2 2 2 CQI, RI

TM4 Closed loop spatial multiplexing with precoding matrix

2 2 2 2 CQI, RI, PMI

Transmission Mode 3

TM3 is spatial multiplexing scheme that uses pre-determined precoding matrix. The process of applying pre-coding is defined in 3GPP specification TS 36.211. Open loop spatial uses Channel Quality Information (CQI) and Rank Indication (RI) information fed-back from UE.

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Number of codewords Number of layers CW, Layer mapping 2 2

Transmission Mode 4

TM4 is spatial multiplexing scheme that uses PMI index fed-back from UE, to construct downlink PDSCH codeword to maximize signal to noise ratio at UE receiver.

A PMI index is a pointer to a set of pre-coding weights that are applied to

downlink code-words prior to transmission. The process of applying pre-coding is defined in 3GPP specification TS 36.211. TM 4 is suitable for scenarios when UE is in slow time-varying channel because there is a delay associated with a PMI report from UE and a corresponding downlink transmission that utilizes the reported PMI index. A stationary or pedestrian speed UE in good RF coverage scenario will get the most benefit from this mode.

Codewords, layers mapping in closed-loop spatial multiplexing (TM4) for 4 antenna ports are tabulated as follows:

Number of codewords Number of layers CW, Layer mapping 1 1 2 2

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SYSTEM OPERATION

How to Active

To enable this feature, DL_ANT_COUNT should be set equal to or greater than n2TxAntCnt.

Execute the CHG-CELL-IDLE command to change the parameter DL_CRS_PORT_COUNT to two to enable 2x2 SU-MIMO.

Key Parameters

RTRV-CELL-IDLE/CHG-CELL-IDLE

Parameter Description

DL_ANT_COUNT This parameter is the number of Tx antennas used by an operating cell. DL_CRS_PORT_COUNT This parameter is the number of downlink CRS ports that are supported by the

system.

RTRV-DL-SCHED/CHG-DL-SCHED

CELL_NUM This parameter describes user-defined cellId.

DL_MIMO_MODE This parameter specifies transmission mode. Each one is corresponding to certain multiple antenna techniques.

TM1: Single-antenna port (port 0), DCI format 1 or 1A is used.

TM2: Transmit diversity, DCI format 1 or 1A is used.

TM3: Open-loop spatial multiplexing, DCI format 2A or 1A is used.

TM4: Closed-loop spatial multiplexing, DCI format 2 or 1A is used.

TM5: MU-MIMO, DCI format 1D or 1A is used. It is a test mode and it is not supported.

TM6: Closed-loop rank-1 precoding, DCI format 1B or 1A is used. It is a test mode and it is not supported.

TM7: Single-antenna port (port 5), DCI format 1 or 1A is used. It is supported for only 8T8R TDD.

TM8: Dual layer transmission, or Single-antenna port (port 7/port 8), DCI format 2B or 1A is used. It is supported for only 8T8R TDD.

TM9: UE specific RS based Transmission (Rel 10) [Related Specifications] 3GPP TS 36.213

ALPHA Fairness weight in PF scheduler. If alpha is increased, scheduling fairness increase such as Round Robin scheduling.

BETA Channel quality weight in PF scheduler. If beta is increased, scheduling efficiency increases such as Max C/I.

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REFERENCE

[1] 3GPP TS 36.201 „Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer; General description‟

[2] 3GPP TS 36.211 „Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation‟

[3] 3GPP TS 36.212 „Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding‟

[4] 3GPP TS 36.213 „Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures‟

[5] 3GPP TS 36.214 „Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer; Measurements‟

[6] 3GPP TS 36.300 „Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2

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LTE-ME2020, Rx Diversity

INTRODUCTION

Currently, receive diversity techniques are not specified in the LTE specification, because receive diversity places no requirements in the transmitter. However, it needs to be noted that receive diversity enables to make better quality on uplink received signal. Samsung eNB support Rx diversity using Minimum Mean Squared Error (MMSE) combining with Interference Rejection Combining (IRC) receiver.

BENEFIT

Rx diversity enables to communicate in the more reliable transmission condition.

DEPENDENCY AND LIMITATION

N/A

FEATURE DESCRIPTION

In Rx diversity, the receiver needs to combine multiple streams from different antenna into a single stream. The challenge here is how to use the information from all the antennas effectively. In fact, it is just a matter of choosing the appropriate weight for each received signals (see the following figure).

There are multiple ways to choose the weight of receiver, but Samsung eNB uses linear MMSE (LMMSE) receiver with IRC to suppress inter-cell interference.

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Linear Minimum Mean Squared Error (LMMSE) Receiver with Interference Rejection

Combining (IRC)

To obtain receive diversity, Samsung eNB considers LMMSE criterion with IRC. This advanced receiver employing IRC is effective in improving the cell-edge user throughput. The IRC receiver utilizes the covariance of interference and noise factors of multiple receiver branches, and combines the received signals for multiple receiver branches so that the Mean Square Error (MSE) between the combined signal and the desired signal is minimized, instead of Maximal Ratio Combining (MRC).

The specific combining criterion is as follows:

1

The channel estimator of the eNB receiver estimates the channel of the desired signal, and generates the covariance matrix of interference and noise. oEstimate the channel matrix of the desired signal

oEstimate the covariance matrix of interference and noise

2

Using the estimated channel and the covariance matrix, MMSE weight is calculated to perform IRC.

oMinimum Mean Squared Error (MMSE) criterion

oMMSE criterion achieves the optimal balance the noise enhancement and interference suppression

oCombined weight

3

Interference rejection is achieved by MMSE combining at the eNB receiver.

The IRC scheme based on MMSE criterion achieves an optimal balance of noise enhancement and interference suppression. Hence, IRC provides the enhanced performance to UEs at the cell boundary that experience serious interference from other cell. The receive diversity can be obtained from combining the calculated weight with received signals for each receiver path.

SYSTEM OPERATION

How to Activate

This feature is an optional feature and can be activated and deactivated with the parameter IRC_ENABLE.

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

Default IRC_ENABLE is 'FALSE (IRC OFF) (IRC_ENABLE= 0)'.



Execute the CHG-PUSCH-IDLE command to set IRC_ENABLE to 'TRUE (IRC ON) (IRC_ENABLE = 1)'.



Execute the RTRV-PUSCH-IDLE command to retrieve the configuration information for IRC_ENABLE.



The operator can disable this feature by setting IRC_ENABLE to 'FALSE (IRC OFF)' (IRC_ENABLE= 0).

Key Parameters

RTRV-PUSCH-IDLE/CHG-PUSCH-IDLE

IRC_ENABLE This parameter is used to enable to use IRC

0: False (IRC OFF)

1: True (IRC ON)

Counters and KPIs

There are no related counters and KPIs.

REFERENCE

[1] 3GPP TS 36.201 Evolved Universal Terrestrial Radio Access (E-UTRA); LTE physical layer; General description

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LTE-ME2022, DL SU 4x4 MIMO (TM3 and TM4)

INTRODUCTION

Multiple antenna techniques aim to improve data robustness or provide an increase in data rates by utilizing special signal structure and exploiting un-correlated fading channels for each transmitted signal. In case of four transmit antennas on an eNB and four receive antennas on the same UE- it is known as downlink 4x4 single-user MIMO. Below figure, illustrates the concept of single user MIMO using m transmit and n receive antennas.

The following figure is m x n single user MIMO concept:

As shown in the figure above, each receiver side antenna receives a composite signal made up of transmitted signals modified by their channels. Under specific channel conditions, the transmitter can structure the transmitted signals to, either send modified copies of the same transmission (transmit diversity) or, send different transmission (spatial multiplexing) or combination of both. Transmit diversity provides signal robustness and spatial multiplexing increases data rate.

BENEFIT



The operator provides improvement in cell capacity and throughput as UEs with better channel conditions can benefit from the multiple streams transmission.



The user can be served with improved throughput or reliable communication due to the multiple streams transmission.

DEPENDENCY AND LIMITATION

Dependency



4Tx RU is necessary.



Category 5 UE (4Rx ready UE) is necessary. (This feature's release schedule is subject to change by UE availability that supports this feature.)

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FEATURE DESCRIPTION

Samsung plans to support the DL SU-MIMO Spatial Multiplexing (SM) in both Transmission Mode 3 (open-loop SM) and Transmission Mode 4 (closed-loop SM) employing 4x4 antenna configuration that is 4 transmit eNB antennas and 4 receive UE antennas.

Transmission mode 3

TM 3 is spatial multiplexing scheme that uses pre-determined precoding matrix. The process of applying pre-coding is defined in 3GPP specification TS 36.211. Open loop spatial multiplexing uses CQI (Channel Quality Information) and RI (Rank Indication) information fed-back from UE.

TM 3 is suitable for scenarios when the UE is in good channel condition. A stationary or pedestrian speed UE in good RF coverage scenario will get the most benefit from this mode.

Codewords, layers mapping in open-loop spatial multiplexing (TM3) for 4 antenna ports are tabulated as follows:

Number of codewords Number of layers CW, Layer mapping 1 2 2 2 3

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Number of codewords Number of layers CW, Layer mapping 4

Transmission Mode 4

TM 4 is spatial multiplexing scheme that uses PMI index fed-back from UE, to construct downlink PDSCH codeword to maximize signal to noise ratio at UE receiver.

downlink code-words prior to transmission. The process of applying pre-coding is defined in 3GPP specification TS 36.211. TM 4 is suitable for scenarios when the UE is in slow time-varying channel because there is a delay associated with a PMI report from UE and a corresponding downlink transmission that utilizes the requested PMI index. A stationary or pedestrian speed UE in good RF coverage scenario will get the most benefit from this mode.

Codewords, layers mapping in close-loop spatial multiplexing (TM4) for 4 antenna ports are tabulated as follows:

Number of codewords Number of layers CW, Layer mapping 1 1 2

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SYSTEM OPERATION

How to Activate

To enable this feature, DL_ANT_COUNT should be set equal to or greater than n4TxAntCnt



Execute the CHG-CELL-IDLE command to change the parameter DL_CRS_PORT_COUNT to four to enable 4x4 SU-MIMO.



Execute the CHG-DL-SCHED command to change the downlink transmission mode.

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system.

CELL_NUM This parameter is the number of cells. This value must not exceed the maximum number of cells supported by the system. It is determined by FA/Sector. For example, if the maximum capacity provided to the carrier per system is 1 FA/3 Sector, up to 3 cells are supported.

DL_MIMO_MODE This parameter specifies transmission mode. Each one is corresponding to certain multiple antenna techniques.

TM1: Single-antenna port (port 0), DCI format 1 or 1A is used.

TM2: Transmit diversity, DCI format 1 or 1A is used.

TM3: Open-loop spatial multiplexing, DCI format 2A or 1A is used.

TM4: Closed-loop spatial multiplexing, DCI format 2 or 1A is used.

TM5: MU-MIMO, DCI format 1D or 1A is used. It is a test mode and it is not supported.

TM6: Closed-loop rank-1 precoding, DCI format 1B or 1A is used. It is a test mode and it is not supported.

TM7: Single-antenna port (port 5), DCI format 1 or 1A is used. It is supported for only 8T8R TDD.

TM8: Dual layer transmission, or Single-antenna port (port 7/port 8), DCI format 2B or 1A is used. It is supported for only 8T8R TDD.

TM9: UE specific RS based Transmission (Rel 10) [Related Specifications] 3GPP TS 36.213

ALPHA Fairness weight in PF scheduler. The larger alpha is, the better the fairness is. BETA Channel quality weight in PF scheduler. The larger beta is, the better the

channel efficiency is.

GAMMA Priority weight in PF scheduler. The larger gamma is the smaller scheduling delay is. However, if it is very high, system capacity can be decreased because scheduler considers delay excessively.

Counters and KPIs

REFERENCE

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LTE-ME2023, DL SU 4x2 MIMO (TM3 and TM4)

INTRODUCTION

Multiple antenna techniques aim to improve data robustness or provide an increase in data rates by utilizing special signal structure and exploiting un-correlated fading channels for each transmitted signal. In case of four transmit antennas on an eNB and two receive antennas on the same UE, it is known downlink 4x2 single-user MIMO. The following figure shows concept of single single-user MIMO using m transmit and n receive antennas.

As shown in the figure above, each receiver side antenna receives a composite signal made up of transmitted signals modified by their channels. Under specific channel conditions, the transmitter can structure the transmitted signals to, either send modified copies of the same transmission (transmit diversity) or, send different transmission (spatial multiplexing). The former case provides signal robustness and the latter provides increase in data rate.

BENEFIT



The operator can provide improvement in cell capacity and throughput as UEs with better channel conditions can benefit from the multiple streams transmission.



The user can be served the improved throughput or reliable communication due to the multiple streams transmission.

DEPENDENCY AND LIMITATION

Dependency



Need 4CRS supported terminal UE.



4T RRU is required.

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

TM4 will be officially supported after IOT and then MIMO mode selection parameter (dlMimoMode) will be enabled.

FEATURE DESCRIPTION

Samsung supports the DL SU-MIMO Spatial Multiplexing (SM) in both Transmission Mode 3 (TM3: open-loop SM) and Transmission Mode 4 (TM4: closed-loop SM) employing either 4x2 antenna configuration that is 4 transmit eNB antennas and 2 receive UE antennas.

Transmit Diversity

Transmit diversity is default MIMO mode in LTE. This redundancy leads to increase in signal-to-noise ratio and therefore, signal robustness. Transmission Mode 2 provides transmit diversity by transmitting a single PDSCH codeword using 4 antennas.

Spatial Multiplexing

In spatial multiplexing, there is no signal redundancy as with transmit diversity; antenna ports transmit different symbols. There are two modes that provide spatial diversity: TM3 and TM4. TM3 uses a predetermined CDD-based precoding and favorable to high speed UEs. TM4 uses a codebook-based precoding and favorable to low speed UEs because scheduler adopts the best precoder per UE based on the precoder back by UE. For both TM3 and TM4, rank adaptation based on fed-back rank information is supported so that the most appropriate number of transmission layers (and codewords) can be adopted.

Mode Description Antenna

Ports

Layer Codewords Channel Rank

UE Feedback TM3 Open loop spatial multiplexing

with cyclic delay diversity

4 2 2 2 CQI, RI

TM4 Closed loop spatial multiplexing with precoding matrix

4 2 2 2 CQI, RI,

PMI

Transmission Mode 3

TM3 is spatial multiplexing scheme that uses pre-determined precoding matrix. The process of applying pre-coding is defined in 3GPP specification TS 36.211. Open loop spatial uses Channel Quality Information (CQI) and Rank Indication (RI) information fed-back from UE.

TM3 is suitable for scenarios when UE is in good channel condition. A stationary or pedestrian speed UE in good RF coverage scenario gets the most benefit from

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Number of codewords Number of layers CW, Layer mapping 2 2

Transmission Mode 4

TM4 is spatial multiplexing scheme that uses PMI index fed-back from UE, to construct downlink PDSCH codeword to maximize signal to noise ratio at UE receiver.

downlink code-words prior to transmission. The process of applying pre-coding is defined in 3GPP specification TS 36.211. TM 4 is suitable for scenarios when the UE is in slow time-varying channel because there is a delay associated with a PMI report from UE and a corresponding downlink transmission that utilizes the reported PMI index. A stationary or pedestrian speed UE in good RF coverage scenario gets the most benefit from this mode.

Codewords, layers mapping in closed-loop spatial multiplexing (TM4) for 4 antenna ports are shown in the following table.

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SYSTEM OPERATION

How to Activate

To enable this feature, DL_ANT_COUNT should be set equal to or greater than n4TxAntCnt.

Execute the CHG-CELL-IDLE command to change the parameter DL_CRS_PORT_COUNT to four to enable 4x2 SU-MIMO.

Key Parameters

RTRV-CELL-IDLE/CHG-CELL-IDLE

system.

CELL_NUM This parameter is the number of cells. This value must not exceed the maximum number of cells supported by the system. It is determined by FA/Sector. For example, if the maximum capacity provided to the carrier per system is 1 FA/3 Sector, up to 3 cells are supported.

ALPHA Fairness weight in PF scheduler. The larger alpha is, the better the fairness is. BETA Channel quality weight in PF scheduler. The larger beta is, the better the

channel efficiency is.

GAMMA Priority weight in PF scheduler. The larger gamma is the smaller scheduling delay is. However, if it is very high, system capacity can be decreased because scheduler considers delay excessively.

Counters and KPIs

REFERENCE

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LTE-ME5110, FDD Carrier Aggregation (5+5)

INTRODUCTION

The FDD Carrier Aggregation (5+5) feature enables an eNB to aggregate with 5+5MHz LTE Component Carriers (CCs). The purpose of multiple CCs

aggregation is to have wider channel bandwidth, which helps operators to increase bitrates for end-users.

BENEFIT



An operator can combine individual CCs from different bands and bandwidths.



The feature ensures that all the spectrum resources are utilized effectively across the network for improving efficiency and achieving peak throughputs.

DEPENDENCY AND LIMITATION

Dependency



HW dependency

oSupport Channel Cards: CA could be restricted depending on the hardware configuration.



Required Network Elements

oNetwork Elements Dependency: No special network element required null



Others: Device needs to support this feature. Limitation

Due to UE availability of CA with 4x4MIMO, CA with 2x2MIMO can be supported.

FEATURE DESCRIPTION

The Samsung eNB supports a combination of 5+5 MHz CCs in downlink. Each aggregated carriers is referred to as CC.

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The operator can have the following three types of carrier allocation based on the spectrum usage:



Intra-band Contiguous CA



Intra-band Non-contiguous CA



Inter-band Non-contiguous CA

For detailed description of CA functionality and its operational procedures, see LTE-SW5500: CA Call Control.

SYSTEM OPERATION

Refer to the System Operation section of LTE-SW5500: CA Call Control feature for configuration, key parameter, and detailed information on counters associated with this feature.

REFERENCE

[1] 3GPP TS 36.101 „Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception‟

[5] 3GPP TS 36.300 „Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2‟

[6] 3GPP TS 36.331 „Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification‟

[7] 3GPP TR 36.814 „Evolved Universal Terrestrial Radio Access (E-UTRA); Further advancements for E-UTRA physical layer aspects‟

[8] 3GPP TR 36.912 „Feasibility study for Further Advancements for E-UTRA (LTE-Advanced)‟

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LTE-ME5111, FDD Carrier Aggregation (3+5)

INTRODUCTION

The FDD Carrier Aggregation (3+5) enables an eNB to aggregate with 3+5 MHz LTE Component Carriers (CCs). The purpose of multiple CCs aggregation is to have wider channel bandwidth, which helps operators to increase bitrates for end-users.

BENEFIT



The operator can combine individual CCs from different band and bandwidths.



All the spectrum resources are utilized effectively across the network for improving efficiency and achieving higher peak throughputs.

DEPENDENCY AND LIMITATION

Dependency



Device needs to support this feature.



CA could be restricted depending on the HW configuration.

FEATURE DESCRIPTION

The following figure shows the 3+5 aggregated LTE channels.

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For detailed description of CA functionality and its operational procedures, refer to LTE-SW5500: CA Call Control feature description document.

SYSTEM OPERATION

REFERENCE

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LTE-ME5112, FDD Carrier Aggregation (3+3)

INTRODUCTION

The FDD Carrier Aggregation (3+3) enables an eNB to aggregate with 3+3 MHz LTE Component Carriers (CCs). The purpose of multiple CCs aggregation is to have wider channel bandwidth, which helps operators to increase bitrates for end-users.

BENEFIT



The operator can combine individual CCs from different band and bandwidths.



All the spectrum resources are utilized effectively across the network for improving efficiency and achieving higher peak throughputs.

DEPENDENCY AND LIMITATION

Dependency



Device needs to support this feature.



CA could be restricted depending on the HW configuration.

FEATURE DESCRIPTION

The following figure shows the 3+3 aggregated LTE channels.

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For detailed description of CA functionality and its operational procedures, refer to LTE-SW5500: CA Call Control feature description document.

SYSTEM OPERATION

REFERENCE

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LTE-ME6004, DL Smart

INTRODUCTION

The DL-Smart feature performs centralized coordination for the radio resource of all cells connected to Smart Scheduler Server to enhance the cell performance. In this case, each eNB allocates the physical radio resource to the UE based on the results of the coordination.

BENEFIT

This will result in performance enhancement for DL data transmission.

DEPENDENCY AND LIMITATION

Dependency



This feature works with Smart Scheduler server. Smart Scheduler server supports C-RAN only, D-RAN only, or H-RAN mode.



The eNB operates RT or NRT mode depending on the mode of Smart Scheduler server.



This feature needs time synchronization between cells.



This feature requires backhaul latency between eNB and Smart Scheduler Server less than 30ms (in round-trip-time (RTT)) for DRAN or HRAN.

Limitation



The number of cells supporting a Smart Scheduler server is different according to the type of the server.



MR based DL Smart is necessary when Carrier Aggregation (CA) is activated.

FEATURE DESCRIPTION

The network for DL-Smart is consisted of one Smart Scheduler and a large number of eNBs. Samsung supports three types of DL-Smart networks as C-RAN, D-RAN, and H-RAN. Each network diagram is referred from the following figures.

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(B) D-RAN

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Each eNB is connected with Smart Scheduler server and is classified as C-RAN eNB or D-RAN eNB according to the transmission delay between Smart Scheduler server and eNB.

In figure (A), C-RAN eNB is concentrated with Smart Scheduler, so C-RAN network guarantees short transmission delay less than 1ms. Each RU distributed from C-RAN eNB is connected with DU using the dark fiber.

D-RAN eNB is shown in figure (B) and is distributed from Smart Scheduler using Ethernet network connection with transmission delay longer than 1ms.

Smart Scheduler server can support inter-cell interference coordination via same structure for C-RAN and D-RAN. Thus, Smart Scheduler server can support DL-Smart although C-RAN eNBs and D-RAN eNBs are interconnected in H-RAN environment. H-RAN network is shown in figure (C).

In each network architecture, if there is no Smart Scheduler, eNBs can provide stand-alone operation.

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The following functions are performed by each SW block:



Coordinator in Smart Scheduler server oNon real time (NRT) coordination.

oReal time (RT) coordination for C-RAN cells.

oTransfer NRT/RT resource allocation pattern to RT-Scheduler.



Pre-Scheduler in Smart Scheduler server

oSelection of the representative UE for each cell

oTransfer the metric of the representative UE to coordinator.



UE Manager in Smart Scheduler server

oSRS/MR based Tx power estimation of Cell

oGeneration of the preferred resource allocation pattern



RT-Scheduler in eNB

oSelects a candidate UE, and then transfer channel and traffic information of the candidate UE to Smart Scheduler server. (When carrier aggregation and DL Smart are enabled at the same time, RT-Scheduler receives MR for the SCell from each UE and then transfers it to Smart Scheduler Server periodically.)

oAllocates resource using NRT/RT resource allocation pattern

DL-Smart feature performs scheduling according to the following procedure:

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2

UE Manager block of the Smart Scheduler generates the preferred resource allocation pattern for each UE using DL/UL received power estimation.

3

Pre-Scheduler block selects the representative UE for each cell.

4

Coordinator block performs the coordination of radio resources for each cell based on the scheduling metric, generates the resource allocation pattern based on the coordination results and sends it to eNB.

5

RT-Scheduler block compensates the UE channel quality (CQI) based on the resource allocation pattern and allocates the control channel and the data channel to UE.

6

RT-Scheduler block confirms the resource allocation based on the resource coordination information from Post-Scheduler block and generates RLC/Modem control information.

SYSTEM OPERATION

How to Activate

To enable this feature, execute the CHG-CELLSCHR-CONF command.



If the flag of SMART_CELL_COORDI_ENABLE is false, the state of DL smart is OFF.



If the flag of SMART_CELL_COORDI_ENABLE is true, the state of DL smart is ON.

Key Parameters

RTRV-CELLSCHR-CONF/CHG-CELLSCHR-CONF

CELL_NUM The cell number. This value must not exceed the maximum number of cells supported by the system.

SMART_CELL_COORDI_ENABL E

It is the SmartCell DL Coordination function ON (true)/OFF (false) flag, that is, the control flag of interworking function between eNB and the Smart Scheduler Server.

Counters and KPIs

Family Name Type Description

Throughput distribution counter for CS ON OFF (1 of 2)

ThroughputAvg Average UE throughput ThroughputTot Total UE throughput

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Family Name Type Description

CS ON OFF (2 of 2) 16,900 kbps to 16,920 kbps

... ...

Thru280600_306200 Number of UE throughputs ranging from 280,600 kbps to 306,200 kbps

REFERENCE

[8] 3GPP TR 36.819 „Coordinated multi-point operation for LTE physical layer aspects‟

[9] 3GPP TR 36.913 „Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN)‟

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LTE-ME6005, UL Smart (Interference

Coordination for UL)

INTRODUCTION

The UL-Smart feature performs centralized coordination for the radio resource of all cells to enhance the cell performance. In this case, each eNB allocates the physical radio resource to UE based on the results of the coordination.

BENEFIT

This will result in performance enhancement for UL data transmission.

DEPENDENCY AND LIMITATION

Dependency



This feature works with Smart Scheduler server which supports C-RAN only, D-RAN only, or H-D-RAN.



This function needs time synchronization.



This feature follows DL Smart (LTE-ME6004) feature in terms of the network architecture, interfaces, and so on.

Limitation

The number of cells supported by a Smart Scheduler server is different according to the type of the server.

FEATURE DESCRIPTION

The network for UL-Smart is consisted of one Smart Scheduler and a large number of eNBs. Samsung supports three types of UL-Smart networks as C-RAN, D-RAN, and H-RAN. Each network diagram is referred from the following figures.

(43)

(B) D-RAN

(44)

Each eNB is connected with Smart Scheduler server and is classified as C-RAN eNB, and D-RAN eNB according to the transmission delay between Smart Scheduler server and eNB.

In figure (A), C-RAN eNB is concentrated with Smart Scheduler, so C-RAN network guarantees short transmission delay less than 1ms. Each RU distributed from C-RAN eNB is connected with DU using the dark fiber.

D-RAN eNB is shown in figure (B) and is distributed from Smart Scheduler using Ethernet network connection with transmission delay longer than 1ms.

Smart Scheduler server can support inter-cell interference coordination via same structure for C-RAN and D-RAN. Thus, Smart Scheduler server can support UL-Smart although C-RAN eNB and D-RAN eNB are co-located in H-RAN

environment. H-RAN network is shown in figure (C).

In each network architecture, if there is no Smart Scheduler, eNBs can provide stand-alone operation.

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The following functions are performed by each SW block:



Coordinator in Smart Scheduler server

oDetermines inter-interference relation between serving cell and neighbor cells based on SRS.

oGenerates allocation pattern using load information and inter-cell interference relation to improve the performance of cell edge UE.

oTransfers resource allocation pattern to RT-Scheduler.



UE Manager in Smart Scheduler server

oDetermines (1) cell edge UEs based on SRS

oDetermines (2) which of cells receive inter-cell interference from UE of the serving cell based on SRS.

oTransfers UE‟s information (1) and (2) to RT-Scheduler, and information (2) to Coordinator.



RT-Scheduler in eNB

oTransfers load information, such as the amount of inter-cell interference which UEs generate in the serving and amount of inter-cell interference which the serving cell receives from neighbor cells, to Coordinator. oAllocates resource using UE‟s information and resource allocation pattern. UL-smart feature performs the scheduling according to the following procedure:

1

RT-Scheduler calculates the amount of inter-cell interference which UEs generate in the serving and amount of inter-cell interference which the serving cell receives from neighbor cells. And then RT-Scheduler transfers them to Coordinator in Smart Scheduler server.

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2

UE Manager determines (1) cell edge UE and (2) which of cell receive inter-cell interference from UE of serving cell based on SRS. And then UE Manager transfers UE‟s information (1) and (2) to RT-Scheduler, and information (2) to Coordinator.

3

Coordinator determines inter-interference relation between cells based on SRS. And then coordinator generates allocation pattern using load information and inter-cell interference relation.

4

Coordinator transfers resource allocation pattern to RT-Scheduler.

5

RT-Scheduler allocates resource to UEs using UE‟s information and resource allocation pattern for cell edge UEs to avoid inter-cell interference from neighbor cells.

SYSTEM OPERATION

How to Activate

This feature is an optional feature and can be activated and deactivated.



Execute the RTRV-SMTUL-SCHED command to retrieve the configuration information of smart uplink scheduling.



Execute the CHG-SMTUL-SCHED command to change the configuration information of smart uplink scheduling in units of smart scheduler server. oIf the value of ulSmartCsOnOff is '0', the state of UL smart is OFF.

oIf the value of ulSmartCsOnOff is not '0', the state of UL smart is ON. (The recommended value of ulSmartCsOnOff is '3')

Key Parameters

RTRV-SMTUL-SCHED/CHG-SMTUL-SCHED

dbIndex This is just db index.

ulSmartCsOnOff This parameter enables or disables the coordinated scheduling (CS) of UL smart.

If ulSmartCsOnOff = 0, coordinated scheduling is OFF (false).

If ulSmartCsOnOff = 1, coordinated scheduling using start RB index is ON (true). RT-Scheduler can allocate the resource from the lowest RB index or from the highest RB index for cell edge UE to avoid inter-cell interference between neighbor cells.

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Counters and KPIs

There is no related counter and KPI.

REFERENCE

[8] 3GPP TR 36.819 „Coordinated multi-point operation for LTE physical layer aspects‟

[9] 3GPP TR 36.913 „Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN)‟

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Chapter 2 Call Control

LTE-SW0111, UE Counting per Category

INTRODUCTION

The eNB performs counting for each category of RRC_Connected UE and collects the statistics per eNB.

BENEFIT

UE counting per category supports to analyze the connected UEs' status per category.

DEPENDENCY AND LIMITATION

Limitation:



This statistics collection is impossible if eNB cannot acquire UE category information from MME during idle to active transition.



If a time-out occurs because UE does not transmit ATTACH COMPLETE, the statistics is counted but UE context release may be performed in MME.

FEATURE DESCRIPTION

This feature enables the operator to know the number of UE in the network for each UE category. The eNB obtains UE category information during two possible states - during attachment or idle to active transition.

The following figure shows during ATTACH procedure, eNB saves UE category during UE Capability Enquiry/UE Capability Information procedure and counts the statistics after ATTACH procedure is finished.

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The following figure shows during Idle to Active procedure, eNB saves UE category during Initial Context Setup Request/Initial Context Setup Response procedure and counts the statistics after ATTACH is finished.

SYSTEM OPERATION

How to Activate

This feature is basically enabled and operator cannot disable.

Key Parameters

There are no related parameters.

Counters and KPIs

Family Display Name

Type Name Type Description

UE Category UE_Category_1 Number of UEs in the UE Category 1 UE_Category_2 Number of UEs in the UE Category 2 UE_Category_3 Number of UEs in the UE Category 3 UE_Category_4 Number of UEs in the UE Category 4 UE_Category_5 Number of UEs in the UE Category 5 UE_Category_6 Number of UEs in the UE Category 6 UE_Category_7 Number of UEs in the UE Category 7 UE_Category_8 Number of UEs in the UE Category 8 UE_Category_9 Number of UEs in the UE Category 9 UE_Category_10 Number of UEs in the UE Category 10 UE_Category_11 Number of UEs in the UE Category 11 UE_Category_12 Number of UEs in the UE Category 12 UE_Category_13 Number of UEs in the UE Category 13

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Family Display Name

Type Name Type Description

UE_Category_14 Number of UEs in the UE Category 14 UE_Category_15 Number of UEs in the UE Category 15 UE_Category_0 Number of UEs in the UE Category 0

REFERENCE

[1] The Vendor‟s LTE solution shall support functionality to enquire UE capability and record number of UEs per eNodeB and per cell for each UE category.

[2] 3GPP TS36.300 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2

[3] 3GPP TS36.306 Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio access capabilities (Release 9)

[4] 3GPP TS36.331 Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification (Release 9)

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LTE-SW0114, Enhancements for Diverse Data

Applications

INTRODUCTION

Multiple Diverse Data Applications like Instant Messaging, Interactive Content Pull, Gaming, and HTTP Video Streaming are used in UE such as Smart Phones. With increasing use of such applications, UE suffers low battery life time. So, it is necessary to optimize the power consumption of UE. Therefore, eNB is required to provide a better power efficient mode of operation.

BENEFIT



Reduction in Power Consumption.



Improvements in System efficiency.

DEPENDENCY AND LIMITATION

Dependency



Release 11 UE to support UEAssistance Information.



During transmitting UEAssistance message to UE, if UE sets

powerPrefIndication to normal, UE starts or restart timer T340 with the value of powerPrefIndicationTimer received from eNB during

RRCconnectionReconfiguration message.



The UE should not change the PowerPreferenceMode from Normal to lowPowerConsumption until the T340 timer expires.



The UE upon initiating RRCConnectionreestablishment procedure, releases powerPrefIndicationConfig, if configured and stop timer T340, if running.

FEATURE DESCRIPTION

The purpose of RAN Enhancements to Diverse Data Applications is for eNB to provide UE a power saving operation. Upon configuring UE to provide power preference indications, eNB waits for UE to provide its power saving preference. Once the Preference is known from UE, eNB provides appropriate resolution based on operator's configuration.

This feature is enabled based on the Device Type of UE. If UE DeviceType is set to noBenFromBatConsumpOpt received from UE in UE-EUTRA-Capability-v920-IE. Then this feature is disabled as no DRX solution could be provided since UE does not need a Network Controlled Battery Saving Solution.

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If UE DeviceType is not set to noBenFromBatConsumpOpt received from UE in UE-EUTRA-Capability-v920-IE, then this feature is enabled.

1

If this feature is enabled, eNB configures UE to provide power preference indication by sending RRC connection reconfiguration message to UE with powerPrefIndicationConfig data structure set to setup. This configuration message can be sent during any reconfiguration on the serving cell or in the reconfiguration message during handover to E-UTRA.

powerPrefIndicationConfig-r11 is present in otherConfig-r9 structure. The setup parameter part of the powerPrefIndicationConfig contains

powerPrefIndicationTimer-r11 parameter, which is a Prohibit timer for Power Preference Indication reporting of UE. This prevents from frequent

PowerMode Change (T340 timer) of UE from Normal to Low.

2

The UE responds with RRC connection reconfiguration complete message.

3

The UE further notifies to eNB with its power saving preference by sending UEAssistanceInformation message with setting either of two possible below mentioned values

opowerPrefIndication is set to lowPowerConsumption (or) opowerPrefIndication is set to normal.

The UE start or restart timer T340 with timer value set to the powerPrefIndicationTimer received from eNB during RRCconnectionReconfiguration message.

The UE should not change the PowerPreferenceMode from Normal to lowPowerConsumption until the T340 timer expires.

The UE upon initiating RRCConnectionreestablishment procedure, UE should release powerPrefIndicationConfig, if configured and stop timer T340, if running;

4

If eNB receives the message with parameter powerPrefIndication set to olowpowerconsumption, then based on the Operator configuration,

The eNB may respond to UE with either a long value for long DRX cycle or

Feature/Parameter Configuration Value/Description

DRX Long cycle length 80, 160, 320, 640, 1280, 2560 ms

The eNB may respond to UE with RRC connection release message to save UE device power consumption.

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SYSTEM OPERATION

How to Activate

Execute the CHG-UEPWRSAVING-CONF command to set 'usedFlag' to 'USE'. The operator can disable this feature by setting the parameter to 'NO_USE'.

Key Parameters

CHG-UEPWRSAVING-CONF/RTRV-UEPWRSAVING-CONF

USED_FLAG This parameter shows whether UE power saving function is supported or not. PREF_IND_TIMER This parameter shows Prohibit timer (T340) for Power Preference Indication

reporting. Value in seconds. Value s0 means prohibit timer is set to 0 second or not set, value s0dot5 means prohibit timer is set to 0.5 second, value s1 means prohibit timer is set to 1 second and so on

SUPPORT_METHOD This parameter shows the method to support UE power saving.

CHG-UEPWRSAVING-DRXINFO/RTRV-UEPWRSAVING-DRXINFO

QCI This parameter is the QoS Class Identifier (QCI). The range is 0-255.The standard QCI defined in the standard document is 1-9. 0 and 10-255 can be used by the operator optionally.

DRX_CONFIG_SETUP This parameter indicates whether to use the DRX for UE power saving.

Release: DRX is not used.

Setup: DRX profile is used

ON_DURATION_TIMER This parameter is onDurationTimer to monitor PDCCH in DRX mode.

(onDurationTimer-Specifies the number of consecutive PDCCH-subframe(s) at the beginning of a DRX Cycle.)

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DRX_INACTIVITY_TIMER This parameter is drxInactivityTimer to monitor PDCCH in DRX mode. (drx-InactivityTimer - Specifies the number of consecutive PDCCH-subframe(s) after successfully decoding a PDCCH indicating an initial UL or DL user data transmission for this UE.)

DRX_RETRANSMISSION_T IMER

This parameter is drxRetransmissionTimer to monitor PDCCH in DRX mode. (drx-RetransmissionTimer - Specifies the maximum number of consecutive PDCCH-subframe(s) for as soon as a DL retransmission is expected by the UE.)

LONG_DRXCYCLE_START _OFFSET_TYPE

The long DRX cycle and drx start offset values to run onDurationTimer in DRX mode. For UE power saving, longDRCCycle can have multiples of sf80.

Counters and KPIs

There are no related counters or KPIs.

REFERENCE

[1] 3GPP TS36.300 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2. Release 11

[2] 3GPP TS36.331 Evolved Universal Terrestrial Radio Access (E-UTRA); RRC Control and Signalling. Release 11

[3] 3GPP TR 36.822 LTE Radio Access Network (RAN) enhancements for diverse data applications. Release 11

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LTE-SW0315, Extended Access Barring (SIB14)

INTRODUCTION

During network congestion, core Network will not be able to allocate backhaul resources for all UE's. So, an overload control mechanism is required. Extended Access Barring (EAB) bars low priority UE's such as MTC from accessing the network during RAN overload period. These UE's are affected by relatively lesser importance. To Support EAB, barring information is transmitted in SIB14 which is broadcasted to UEs.

BENEFIT



Provides RAN overload control and overload control for shared RANs.



Provides Core Network Overload Control.

DEPENDENCY AND LIMITATION

Dependency Release 11 UE Related Features

LTE-SW4105 Access Class Barring

FEATURE DESCRIPTION

Due to diverse applications and services deployed in LTE network, there could be excess traffic resulting due to use of these applications and services. So, it is necessary to mitigate E-UTRAN access during peak traffic. The peak traffic could be from both core and access network. In case of core network, MME signaling or O&M can trigger E-UTRAN to initiate EAB (From TS 23.401 Section 4.3.17.2 Point (d)). Also, peak traffic could be reduced by refraining low-priority UEs such as MTC devices to having access to eNB. 3GPP Release 11 features provides enhancements to GPRS to achieve this. This feature is Extended Access Barring. During Peak Traffic, eNB reaches congestion state.



The MME notifies to eNB about the congestion state. The eNB can initiate EAB when all MMEs connected to eNB request to restrict the load for UEs that are connected to the network with low access priority. It is achieved through OVERLOAD START message sent from MME to ENB. (From TS 23.401 Section 4.3.7.4.1).

eNodeB Feature-Description PACKAGE 4.0.pdf

Radio

A

cc

ess

Netw

ork

Samsung eNB (LTE)

Feature Description

for PKG 5.0.0

Document Version 2.0

December 2015

Contents

Preface

Relevance

Conventions in this Document

Symbols

File Names and Paths

User Input and Console Screen Output Text

New and Changed Information





Revision History

Organization of This Document

Related Documentation







Chapter 1

Air Performance

Enhancement

LTE-ME2019, DL SU 2x2 MIMO (TM3 and TM4)

INTRODUCTION

BENEFIT





DEPENDENCY AND LIMITATION



FEATURE DESCRIPTION

Transmit Diversity

Spatial Multiplexing

Transmission Mode 3

Transmission Mode 4

SYSTEM OPERATION

How to Active

Key Parameters

REFERENCE

LTE-ME2020, Rx Diversity

INTRODUCTION

BENEFIT

DEPENDENCY AND LIMITATION

FEATURE DESCRIPTION

Linear Minimum Mean Squared Error (LMMSE) Receiver with Interference Rejection

Combining (IRC)

1

2

3

SYSTEM OPERATION

How to Activate









Key Parameters

Counters and KPIs

REFERENCE

LTE-ME2022, DL SU 4x4 MIMO (TM3 and TM4)

INTRODUCTION

BENEFIT





DEPENDENCY AND LIMITATION





FEATURE DESCRIPTION

Transmission mode 3

Transmission Mode 4

SYSTEM OPERATION

How to Activate

