Energy Conservation and Emission Reduction Feature Parameter Description(ERAN2.0_01)

eRAN

Energy Conservation and Emission Reduction Feature Parameter Description

Issue 01

Date 2010-07-30

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

Copyright © Huawei Technologies Co., Ltd. 2010. 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 the property 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 the warranty of any kind, express or implied.

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Website: http://www.huawei.com

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eRAN Energy Conservation and Emission Reduction Contents

Issue 01 (2010-07-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

i

Contents

1 Introduction.................................................................................................................................1-1 1.1 Scope.............................................................................................................................................................1-1 1.2 Intended Audience.........................................................................................................................................1-1 1.3 Change History..............................................................................................................................................1-1

2 Overview......................................................................................................................................2-1 2.1 Background ...................................................................................................................................................2-1 2.2 Energy Conservation and Emission Reduction Functions.............................................................................2-2 2.3 Related Features ............................................................................................................................................2-2

2.3.1 Features Related to Intelligent Power-Off of Carriers in the Same Coverage......................................2-2 2.3.2 Features Related to RF Channel Intelligent Shutdown ........................................................................2-3 2.3.3 Features Related to Adaptive Power Consumption..............................................................................2-3 2.3.4 Features Related to Low Power Consumption Mode...........................................................................2-3 2.3.5 Features Related to Power Consumption Monitoring ..........................................................................2-3

3 Intelligent Power-Off of Carriers in the Same Coverage...................................................3-1 3.1 Related Concepts...........................................................................................................................................3-1 3.2 Conditions for Starting Intelligent Power-Off of Carriers in the Same Coverage .........................................3-3 3.3 Actions of eNodeB in Intelligent Power-Off of Carriers in the Same Coverage Mode.................................3-3 3.4 Conditions for Stopping Intelligent Power-Off of Carriers in the Same Coverage .......................................3-3

4 RF Channel Intelligent Shutdown..........................................................................................4-1 4.1 Conditions for Starting RF Channel Intelligent Shutdown............................................................................4-1 4.2 Actions of eNodeB in RF Channel Intelligent Shutdown Mode ...................................................................4-1 4.3 Conditions for Stopping RF Channel Intelligent Shutdown..........................................................................4-2

5 Adaptive Power Consumption ................................................................................................5-1 5.1 Adaptive Power Adjustment..........................................................................................................................5-1 5.2 eNodeB Regular Shutdown and Startup........................................................................................................5-2

6 Low Power Consumption Mode .............................................................................................6-1 6.1 Conditions for Entering Low Power Consumption Mode.............................................................................6-1 6.2 Actions of eNodeBs in Low Power Consumption Mode...............................................................................6-1

6.2.1 Lowering Transmit Power of Available Services .................................................................................6-2 6.2.2 Lowering Transmit Power of Reference Signals..................................................................................6-2 6.2.3 Shutting Down Some RF Channels......................................................................................................6-2

Contents eRAN

Energy Conservation and Emission Reduction

ii Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

Issue 01 (2010-07-30)

6.2.4 Shutting Down Carriers .......................................................................................................................6-2 6.3 Conditions for Exiting Low Power Consumption Mode...............................................................................6-2

7 Power Consumption Monitoring............................................................................................7-1 7.1 Collecting Power Consumption Statistics of the eNodeB or Cell .................................................................7-1 7.2 Querying Energy Conservation Status of the eNodeB or Cell ......................................................................7-1 7.3 Setting Energy Conservation Parameters of the eNodeB..............................................................................7-2

8 Correlations Between Functions .............................................................................................8-1

9 Engineering Guidelines............................................................................................................9-1 9.1 Configuring Intelligent Power-Off of Carriers in the Same Coverage ..........................................................9-1 9.2 Configuring RF Channel Intelligent Shutdown.............................................................................................9-1 9.3 Configuring Adaptive Power Consumption ..................................................................................................9-2

9.3.1 Configuring Adaptive Power Adjustment ............................................................................................9-2 9.3.2 Configuring eNodeB Regular Shutdown and Startup ..........................................................................9-2

9.4 Configuring Low Power Consumption Mode ...............................................................................................9-2

10 Parameters ...............................................................................................................................10-1

11 Counters ...................................................................................................................................11-1

12 Glossary ...................................................................................................................................12-1 12.1 Terms.........................................................................................................................................................12-1 12.2 Acronyms and Abbreviations ....................................................................................................................12-1

13 Reference Documents............................................................................................................13-1

eRAN Energy Conservation and Emission Reduction 1 Introduction


1-1

1 Introduction

1.1 Scope ation and emission reduction functions of Huawei

LTE eNodeB, which are intelligent power-off of carriers in the same coverage, RF channel intelligent shutdown, adaptive power consumption, low power consumption mode, and power

addition, this document provides technical principles and these functions.

1.2 Intend This document is intended for:

Personnel who understand the energy conservation and emission reduction feature personnel who work with Huawei products

1.3 Change History This anges in different document versions. There are

o

e energy conservation and emission reduction feature of a specific product version.

orial change: refers to the change in wording or the addition of the information that ersion.

Document Issues The document issues are as follows:

01 (2010-07-30)

This document describes the energy conserv

consumption monitoring. Inengineering guidelines of

ed Audience

Maintenance

section provides information on the chtw types of changes, which are defined as follows:

Feature change: refers to the change in th

Editwas not described in the earlier v

Draft (2010-05-20)

1 Introduction eRAN


1-2 Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

Issue 01 (2010-07-30)

01 (2010-07-30) C e 10-05-20) of eRAN2.0, issu 010-07-30) of eRAN2.0 inc ll hanges:

ompared with thorporates the fo

draft (20owing c

e 01 (2

Change Type Change Description Parameter Change

Feature Change None None

Editorial change F

re

Carriers in the Same Coverage 7 Power Consumption Monitoring

9 Engineering Guidelines

None eature IDs are added. The following chapters are

vised: 3 Intelligent Power-Off of

Draft (2010-05-20) This is the draft.

eRAN Energy Conservation and Emission Reduction 2 Overview


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2 Overview

2.1 BackgrThe global problems of severe energy crisis and environmental pollution have resulted in an

re onal expenditure (OPEX) of telecom operators. Considering the following ept

rice leads to an increase in the OPEX of telecom consequently reduces their profits. In addition, fierce competition

on rs results in a continuous decline in their Average Revenue Per User is

ng actions to conserve energy and reduce emissions. Standardization organizations are making continuous efforts to develop

servation in telecom sector and telecom operators are

al warming, and consequent climate

f

of the electric power is consumed by the access network which involves wireless sites and narrowband/broadband access sites. The analysis shows that the wireless sites of a number of telecom operators consume over 70% of the total energy. The energy conservation and emission reduction feature is mainly targeted at wireless sites and their auxiliary devices.

ound

inc ase in operatifactors, Huawei introduces the concept of green communication and incorporates this concinto an end-to-end green solution.

High OPEX

The increase in energy consumption and energy p operators and

am g telecom operato(ARPU). In such a situation, the way telecom operators can lower OPEX and raise ARPUby reducing the Total Cost of Operation (TCO).

Energy shortage

There is a severe global shortage of energy. Standardization organizations in the telecom industry, telecom operators, and equipment suppliers are taki

standards related to energy conproposing their respective requirements. In such a situation, equipment suppliers can play a major role in energy conservation and emission reduction.

Environmental pollution

Excessive carbon dioxide in the atmosphere causes globchanges lead to various natural disasters. The United Nations requests worldwide effort inreducing emissions of carbon dioxide to combat the greenhouse effect. Governments are taking responsive measures by implementing policies and regulations on energy conservationto reduce energy consumption in different industries.

The energy conservation and emission reduction feature of Huawei eNodeB is one of the major features in Huawei's end-to-end green solution. By analyzing the energy consumptionon the networks of multiple operators, Huawei has found that electricity is the major form oenergy consumption. Most

2 Overview eRAN



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2.2 Energy Conservation and Emission Reduction Functions

The energy conservation and emission reduction feature provides the following optional functions:

LOFD-001042 Intelligent Power-Off of Carriers in the Same Coverage For inter-frequency same-coverage cells, when the traffic is light in an area covered by multiple carriers, some carriers are shut down and services on these carriers are taken over by the other carriers. When the traffic in the area covered by the other carriers exceeds the predefined threshold, these carriers are powered on again.

LOFD-001039 RF Channel Intelligent Shutdown When there is no traffic on the serving carriers, some RF channels are shut down. For example, two RF channels are shut down in the case of 4-way transmit diversity, and one RF channel is shut down in the case of 2-way transmit diversity.

LOFD-001025 Adaptive Power Consumption (including Adaptive Power Adjustment and eNodeB Regular Shutdown and Startup) Based on the output load of the power amplifier (PA), the adaptive power adjustment solution supports dynamic adjustment of the PA working state to achieve optimal power amplification. Alternatively, the transmit and receive channels of the intermediate frequency (IF) system can be shut down on a scheduled basis to improve energy efficiency of the eNodeB.

LOFD-001040 Low Power Consumption Mode When the eNodeB reports an alarm of power insufficiency or power failure, or the eNodeB is being manually operated, the cell works in the low power consumption mode.

LOFD-001041 Power Consumption Monitoring The energy conservation and power consumption status of all the eNodeBs can be viewed on the M2000.

The power-consuming components of the eNodeB are feeder, RF module, baseband module, power supply, and air conditioner, among which the RF module consumes most of the power. The previously mentioned five functions are all used to reduce the power consumption of the RF module.

2.3 Related Features 2.3.1 Features Related to Intelligent Power-Off of Carriers in the Same Coverage

The function of intelligent power-off of carriers in the same coverage is related to the admission and congestion control feature, mobility management in connected mode feature, and scheduling feature.

The function of intelligent power-off of carriers in the same coverage determines whether the Physical Resource Block (PRB) usage reaches the threshold. The PRB usage is measured by the scheduling feature.

The Carrier Intelligent Power-Off Open Threshold and Carrier Intelligent Power-Off Close Threshold must be lower than the Inter-Frequency Load Balance Threshold in the admission and congestion control feature.

eRAN Energy Conservation and Emission Reduction 2 Overview


2-3

The function of intelligent power-off of carriers in the same coverage triggers handovers.

2.3.2 Features Related to RF Channel Intelligent Shutdown The function of RF channel intelligent shutdown is related to the power control feature. Intelligent shutdown of RF channels can increase the transmit power of reference signals.

2.3.3 Features Related to Adaptive Power Consumption The function of adaptive power consumption is not related to any other features.

2.3.4 Features Related to Low Power Consumption Mode The function of low power consumption mode is related to the scheduling feature, power control feature, and MIMO feature.

When the eNodeB enters the low power consumption mode by "Lowering Transmit Power of Available Services", services are scheduled according to the configured maximum transmit power of available services.

When the eNodeB enters the low power consumption mode by "Lowering Transmit Power of Reference Signals", the eNodeB lowers the transmit power of the whole cell according to the configured transmit power of reference signals.

When the eNodeB enters the low power consumption mode by "Shutting Down Some RF Channels", it cannot work in MIMO mode.

2.3.5 Features Related to Power Consumption Monitoring The function of power consumption monitoring is not related to any other features.

eRAN Energy Conservation and Emission Reduction 3 Intelligent Power-Off of Carriers in the Same Coverage


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3 Intelligent Power-Off of Carriers in the Same Coverage

When the number of UEs on a carrier is small, the carrier (known as the source carrier) hands over the UEs to another carrier (known as the target carrier) and then it is powered off for

e target carrier belong to inter-frequency oring cells under the same eNodeB.

3.1 Related Concepts

Inter-FrequenAn inter-frequency same-coverage neighboring cell is a cell in the same coverage area as the source cell but at a different frequency from the source cell. For example, S(2/2/2) means there are two frequencies in each sector. The cells of the two frequencies are called

Load

TS 36.314. The PRB eed Bit Rate (GBR)

services and the PRB usage of non-GBR services are separately measured. The load the load on the Uu interface.

PRB usage is as follows:

energy conservation. The source carrier and thsame-coverage neighb

cy Same-Coverage Neighboring Cells

same-coverage neighboring cells.

The LTE system involves three types of load: load on the Uu interface, load on the eNodeB hardware, and load on the S1 transmission resources.

The measurement of the load on the Uu interface is based on 3GPPusage of the cell represents the load on the cell. The PRB usage of Guarant

mentioned in this document refers to

The formula for calculating the system

where

"n" represents the total number of services.

3 Intelligent Power-Off of Carriers in the Same CoverageeRAN



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RBrequiredi represents the required number of Resource Blocks (RBs) to meet the QoS requirements of service i. If the QoS requirements of current services are not met, the actual number of RBs is considered.

The load statistics collected by the eNodeB are used for features suadmission and congestion control, intelligent power-off of carriers

ch as scheduling, in the same coverage, and

Inter-Frequency Load Balance Threshold (InterFreqMlbThd) ing

oadOffset. When the load gorithm is started; when the

d.

Carrier UL/DL-Off Close Threshold (A) means the carrier is powered off

when bo n A. et.

e Threshold (A1) = UL PRB Usage Close Threshold (DbShdUlPrbCloseThd)

L PRB Usage Close

Carrier UL/DL old (B) -Off Open Threshold (B) means the target carrier is powered

on when the lue

The

Carrier DL Intelligent Power-Off Open Threshold (B2) = DL PRB Usage Close

adaptive power consumption.

This parameter is used to start the inter-frequency load balancing algorithm. When the servcell is overloaded, the eNodeB hands over some UEs to other cells.

To prevent the inter-frequency load balancing algorithm from being started or stopped due to load fluctuation, the algorithm needs to be used together with Lexceeds the value of InterFreqMlbThd plus LoadOffset, the alload falls below the value of InterFreqMlbThd minus LoadOffset, the algorithm is stoppe

Intelligent Power-Off Close Threshold (A) Carrier UL/DL Intelligent Power

th the load on the serving cell and the load on the neighboring cell are lower thaThe value of A must be smaller than the value of InterFreqMlbThd minus LoadOffs

The formulas are as follows:

Carrier UL Intelligent Power-Off Clos

Carrier DL Intelligent Power-Off Close Threshold (A2) = DThreshold (DbShdDlPrbCloseThd)

Intelligent Power-Off Open ThreshCarrier UL/DL Intelligent Power

the load on the carrier is higher than B. The value of B must be smaller thanva of InterFreqMlbThd minus LoadOffset.

formulas are as follows:

Carrier UL Intelligent Power-Off Open Threshold (B1) = UL PRB Usage Close Threshold (DbShdUlPrbCloseThd) + UL PRB Usage Open Threshold Delta (DbShdUlPrbOpenDelta)

Threshold (DbShdDlPrbCloseThd) + UL PRB Usage Open Threshold Delta (DbShdDlPrbOpenDelta)

eRAN Energy Conservation and Emission Reduction 3 Intelligent Power-Off of Carriers in the Same Coverage


3-3

3.2 Condit nCarriers in h

If theInter witch for inter-frequency handover algorithm) is turned on, the

the

/DL Intelligent Power-Off Close Threshold (A).

The average UL/DL PRB usage of the serving cell and all the neighboring cells is lower

e following condition: UL/DL PRB usage of the serving cell + UL/DL PRB usage of the neighboring cell < Carrier UL/DL Intelligent Power-Off

Intelligent Power-Off Close Threshold (A), and Carrier UL/DL Intelligent Power-Off Open Threshold (B) can be configured by setting related parameters. For details, see section 9.1

gent Power-Off of Carriers in the Sam

e igh

mod the serving cell are powered off when there are no UEs in the cell.

3.4 Conditions for Stopping Intelligent Power-Off of Carriers in the Same Coverage

The eNodeB exits the "intelligent power-off of carriers in the same coverage" mode and the carriers are powered on again when one of the following conditions is met:

The specified period for intelligent power-off of carriers in the same coverage ends. The "intelligent power-off of carriers in the same coverage" switch DbShdSwitch is

turned off. The average UL/DL PRB usage of the neighboring cells is higher than Carrier UL/DL

Intelligent Power-Off Open Threshold (B).

io s for Starting Intelligent Power-Off of t e Same Coverage

serving cell has inter-frequency same-coverage neighboring cells and FreqHoSwitch (the s

eNodeB enters the "intelligent power-off of carriers in the same coverage" mode whenfollowing conditions are met:

The specified period for intelligent power-off of carriers in the same coverage starts. The UL/DL PRB usage of the serving cell is lower than Carrier UL

than Carrier UL/DL Intelligent Power-Off Close Threshold (A). One of the neighboring cells (the UE is handed over to this neighboring cell when the

carrier is powered off) meets th

Open Threshold (B).

The duration of intelligent power-off of carriers in the same coverage, Carrier UL/DL

Configuring Intelligent Power-Off of Carriers in the Same Coverage."

3.3 Actions of eNodeB in Intellie Coverage Mode

Th eNodeB hands over UEs from the serving cell to the inter-frequency same-coverage ne boring cell after it enters the "intelligent power-off of carriers in the same coverage"

e. Carriers of

eRAN Energy Conservation and Emission Reduction 4 RF Channel Intelligent Shutdown


4-1

4 RF Channel Intelligent Shutdown

The function of RF channel intelligent shutdown is similar to the function of intelligent power-off of carriers in the same coverage. When there are no UEs in a cell and the RF channel intelligent shutdown period starts, some RF channels are powered off to save energy.

system

4.1 ConditShutdown

e mode when the following conditions are met:

There are no UEs in the cell.

4.2 ActionShutdown Mode

Aftechan

1. ransmit diversity, the two channels on the highest numbered CPRI ports are

er r

y figuring the power of the

previously mentioned channels, see the Power Control Feature Parameter Description.

In this case, the eNodeB increases the transmit power of RF channels so that thecoverage is not affected.

ions for Starting RF Channel Intelligent

Th eNodeB enters the "RF channel intelligent shutdown"

The "RF channel intelligent shutdown" period starts.

s of eNodeB in RF Channel Intelligent

r the eNodeB enters the "RF channel intelligent shutdown" mode, it shuts down some RF nels and increases the transmit power of reference signals to ensure system coverage.

The eNodeB shuts down the RF channels on which the number of UEs is 0. In the case of 4-way tshut down. In the case of 2-way transmit diversity, the channel on antenna port 1 is shut down and the channel on the main TX diversity (antenna port 0) is reserved. After some RF channels are shut down, the remaining channels continue to transmit common signals.

2. The eNodeB increases the transmit power of reference signals. Since the transmit powof the PBCH, PCFICH, PDCCH, and PDSCH is based on the reference signal poweplus offset, the power of these channels will be increased.

The energy saved by shutting down RF channels is much higher than that consumed bincreasing the power of reference signals. For the principles of con

4 RF Channel Intelligent Shutdown eRAN



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The start time and stop time of RF channel intelligent shutdown are specified by the parameters RfShdStartTime and RfShdStopTime respectively.

The eNodeB increases the transmit power of reference signals after shutting down some channels to ensure system coverage. The increased power of reference signals is specified by

ns for Stopping RF Channel Intelligent Shutdown

e nel intelligent shutdown" mode and the RF channels are we met:

The "RF channel intelligent shutdown" switch RfShdSwitch is turned off. The remaining RF channels are working abnormally.

the parameter RfShdDelta.

4.3 Conditio Th eNodeB exits the "RF chanpo red on again when one of the following conditions is

There are UEs in the cell. The "RF channel intelligent shutdown" period ends.

eRAN Energy Conservation and Emission Reduction 5 Adaptive Power Consumption


5-1

5 Adaptive Power Consumption

With the function of adaptive power consumption, the eNodeB dynamically adjusts the power cons nergy consumed

deB adjusts the offset voltage of the PA according to the load.

The eNodeB shuts down the receive and transmit channels of the IF system in a specified period.

des in detail.

5.1 Adapti

he PA efficiency.

e

od

The ent funct on is enabled, the offset voltage of the PA is adjusted as follows:

vent

the matched voltage of the PA according to its load status.

tions where the load of the eNodeB n

Daytime and night-time Working days and holidays of a business area

umption to achieve optimal power amplification and energy efficiency. Ecan be allocated in the following modes:

Adaptive power adjustment The eNo

eNodeB regular shutdown and startup

The following sections describe the two mo

ve Power Adjustment The RF module consumes most of the energy of the eNodeB, and the PA consumes most of the energy of the RF module. Therefore, increasing the PA efficiency is the key to improving the energy efficiency of the eNodeB. The adaptive power adjustment solution is mainly used to increase t

With this solution, the offset voltage of the PA is adjusted according to the load of the eNodeB.The purpose is to reduce power consumption of the PA and improve energy efficiency of theN eB.

parameter DynAdjVoltSwitch specifies whether to enable the adaptive power adjustmion. After this functi

When the eNodeB is heavily loaded, the transmit power of the PA increases and the eNodeB can guarantee the linearity of the PA by raising the offset voltage to presignal distortion.

When the eNodeB is lightly loaded, the transmit power of the PA decreases and the eNodeB can reduce static power consumption by lowering the offset voltage.

That is, the eNodeB calculates

The function is recommended in the following situacha ges dynamically:

5 Adaptive Power Consumption eRAN



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Initial stage and later stage of network deployment

5.2 eNodeB For

exam a "regular shutdown" rio

ve channels of the IF

m

applicable to the eNodeBs along the

he parameter AUTOPOWEROFFSWITCH specifies whether to enable this function. The start time and end time of regular shutdown and startup period are specified by the parameters PowerOnTime and PowerOffTime respectively.

Regular Shutdown and Startup This function automatically powers on or powers off the RF channels on a regular basis.

ple, if you specify the time when there are no UEs in the cell as pe d and the time when there are UEs in the cell as a "regular power-on" period, then:

The eNodeB automatically shuts down the transmit and receisystem when there are no UEs being served by the eNodeB.

The eNodeB automatically powers on the transmit and receive channels of the IF systewhen there are UEs being served by the eNodeB.

The regular shutdown and startup function is typicallyhigh-speed railway lines, as the periods during which there are no UEs being served by the eNodeB are definite. Huawei eNodeB provides the regular shutdown and startup function to reduce the power consumption of the power supply.

T

eRAN Energy Conservation and Emission Reduction 6 Low Power Consumption Mode


6-1

6 Low Power Consumption Mode

When the eNodeB reports an alarm of power insufficiency or power failure, or the eNodeB is time

6.1 ConditMode

Whe ters the l

g the low power consumption mode

anual operations If the low power consumption switch LowPwrOrder is turned on, the cell will enter the

6.2 Actions of eNodeBs in Low Power Consumption Mode o tically takes the following actions in

of available services of the cells

riers

conditions for exiting the low power consumption mode. For details, see section 6.3 "Conditions for Exiting Low Power Consumption Mode."

The following sections describe the four actions.

being manually operated, the cell reduces the power consumption to prolong the service of the eNodeB.

ions for Entering Low Power Consumption

n the low power consumption mode switch LPSWITCH is turned on, the eNodeB enow power consumption mode in the following ways:

Automatically enterinIn a specified period, the eNodeB reports the alarm ALM-25622 Mains Input Out of Range. The time period is specified by the parameters LowPwrStartTime and LowPwrStopTime. Entering the low power consumption mode through m

low power consumption mode regardless of whether a time period of low power consumption is specified or an alarm is reported.

In l w power consumption mode, the eNodeB automasequence:

1. Lower the transmit power2. Lower the transmit power of reference signals 3. Shut down some RF channels 4. Shut down the car

The eNodeB takes all the actions until it meets the

6 Low Power Consumption Mode eRAN



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6.2.1 Lowering Transmit Power of Available Services When the eNodeB enters the low power consumption mode, it first lowers the transmit power of available services in the cell, that is, the transmit power of traffic channels.

The transmit power of traffic channels is lowered by setting the parameters LowPwrServPowerRduTimer and LowPwrServPowerRduPercent.

When the timer for lowering the power of available services (LowPwrServPowerRduTimer) times out, the eNodeB lowers the transmit power of reference signals.

6.2.2 Lowering Transmit Power of Reference Signals The transmit power of reference signals is lowered by setting the parameters LowPwrSignalPowerRduTimer and LowPwrSignalPowerRduDelta.

The eNodeB lowers the transmit power of traffic channels and that of reference signals simultaneously.

When the timer for lowering the power of reference signals (LowPwrSignalPowerRduTimer) times out, the eNodeB shuts down some of the RF channels.

6.2.3 Shutting Down Some RF Channels After some RF channels are shut down, the remaining channels continue to transmit common signals.

In the case of 4-way transmit diversity, the two RF channels on the highest numbered CPRI ports are shut down.

In the case of 2-way transmit diversity, the RF channel on antenna port 1 is shut down and the RF channel on the main TX diversity (antenna port 0) is reserved.

The "RF channel shutdown" duration is specified by the LowPwrRfShdTimer parameter.

The eNodeB lowers the transmit power of traffic channels and reference signals, and shuts down some RF channels.

When the timer for shutting down some RF channels (LowPwrRfShdTimer) times out, the eNodeB also shuts down the carriers of the serving cell.

6.2.4 Shutting Down Carriers The eNodeB shuts down the carriers of the serving cell.

6.3 Conditions for Exiting Low Power Consumption Mode The eNodeB exits the low power consumption mode if the following conditions are met:

If the eNodeB automatically enters the low power consumption mode, it exits the mode when one of the following conditions is met: − The low power consumption mode switch LowPwrSwitch is turned off. − The low power consumption timer times out. − The alarm is cleared.

eRAN Energy Conservation and Emission Reduction 6 Low Power Consumption Mode


6-3

If the eNodeB enters the low power consumption mode through manual operations, it exits the mode when the switch LowPwrOrder is turned off.

eRAN Energy Conservation and Emission Reduction 7 Power Consumption Monitoring


7-1

7 Power Consumption Monitoring

This function enables the eNodeB to report the current status of power consumption to the NodeBs and the status

involves the following:

Collecting power consumption statistics of the eNodeB Querying energy conservation status of the eNodeB or cell

7.1 CollecteNodeB or

time granularity on the M2000 to collect the we about the components or equipment of the eNodeB. The tis llows:

consumption

RRU power consumption eNodeB DL throughput

7.2 Queryior Cell

llect the duration of each shutdown of the RF channels or carriers within a specific period.

If a cell or an eNodeB is monitored, it performs corresponding energy conservation functions, as listed in Table 7-1.

M2000. Users can view the energy conservation status of all the ereports on the M2000. The power consumption monitoring function

Setting energy conservation parameters of the eNodeB or cell

ing Power Consumption Statistics of the Cell Users can specify the measurement period andpo r consumption informationsta tics to be collected are as fo

eNodeB equipment power BBU power consumption

The measurement results are displayed in a list or a chart on the M2000.

ng Energy Conservation Status of the eNodeB

On the M2000, users can query the energy conservation functions a monitored cell or eNodeB has enabled and also view the detailed configuration data of these functions. For example, users can query and co

7 Power Consumption Monitoring eRAN



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Table 7-1 Energy conservation functions of a monitored cell or eNodeB

Monitored Cell/eNodeB Energy Conservation Function

Cell Intelligent power-off of carriers in the same coverage

RF channel intelligent shutdown Low power consumption mode Adaptive power adjustment

eNodeB eNodeB regular shutdown and startup

7.3 Setting Energy Conservation Parameters of the eNodeB Users can set the parameters related to energy conservation functions, as listed in Table

7-1, on the M2000. By setting the parameters, users can customize energy conservation strategies. Take the "intelligent power-off of carriers in the same coverage" function as an example. Users can determine whether to turn on the "intelligent power-off of carriers in the same coverage" switch and determine the time to start or stop the function. For details about the recommended settings of parameters, see chapter 　"

eRAN Energy Conservation and Emission Reduction 7 Power Consumption Monitoring


7-1

Engineering Guidelines."

eRAN Energy Conservation and Emission Reduction 8 Correlations Between Functions


8-1

8 Correlations Between Functions

Th correlations between the functions "intelligent power-off of carriers in the same rage", "RF channel intelligent shutdown",

e cove and "low power consumption mode" are as

then the serving cell will enter the low power consumption mode.

If the serving cell has been in the "intelligent power-off of carriers in the same coverage" mode, it will not enter the "RF channel intelligent shutdown" mode.

follows:

If the serving cell has been in the low power consumption mode, the eNodeB will not shut down the carriers and RF channels.

If the serving cell has been in the "RF channel intelligent shutdown" mode and it meets the conditions for entering the low consumption mode, the eNodeB will power on the RF channels after the shutdown period ends, and then the serving cell will enter the low power consumption mode.

If the serving cell has been in the "RF channel intelligent shutdown" mode and it meets the conditions for starting "intelligent power-off of carriers in the same coverage", it willenter the "intelligent power-off of carriers in the same coverage" mode.

If the serving cell has been in the "intelligent power-off of carriers in the same coverage" mode and it meets the conditions for entering the low power consumption mode, the eNodeB will power on the carriers after the shutdown period ends, and

eRAN Energy Conservation and Emission Reduction 9 Engineering Guidelines


9-1

9 Engineering Guidelines

This chapter provides engineering guidelines regarding the configuration of the energy conservation and emission reduction feature.

9.1 ConfigSame Cov

the c

t is daily traffic becomes low.

the same coverage. It is daily traffic becomes high.

DbShdDlPrbOpenDelta: DL PRB Usage Open Threshold Delta DbShdUlPrbCloseThd: UL PRB Usage Close Threshold

9.2 Configuring RF Channel Intelligent Shutdown of a cell in a specified

rio

own RfShdStopTime: Stop time of RF channel intelligent shutdown RfShdDelta: increased power of reference signals

After this function is enabled, the cell throughput decreases.

uring Intelligent Power-Off of Carriers in the erage For inter-frequency same-coverage cells, if the eNodeB is to automatically disable or enable

arrier of the serving cell in a specified period when the system load reaches a certain threshold, set the following parameters:

DbShdStartTime: Start time of intelligent power-off of carriers in the same coverage. Irecommended that the start time be set to a time when the

DbShdStopTime: Stop time of intelligent power-off of carriers inrecommended that the stop time be set to a time when the

DbShdDlPrbCloseThd: DL PRB Usage Close Threshold

DbShdUlPrbOpenDelta: UL PRB Usage Open Threshold Delta

If the eNodeB is to automatically disable or enable some RF channelspe d, set the following parameters:

RfShdStartTime: Start time of RF channel intelligent shutd

9 Engineering Guidelines eRAN



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9.3 Configuring Adaptive Power Consumption 9.3.1 Configuring Adaptive Power Adjustment

The eNodeB automatically adjusts the voltage after the adaptive power adjustment function is activated. Therefore, the parameter configuration is not required.

9.3.2 Configuring eNodeB Regular Shutdown and Startup If the eNodeB is to automatically disable the transmit and receive channels of the IF system at a specific time, set the PowerOffTime parameter. It is recommended that the parameter be set to a time when there is no traffic, for example, at the midnight.

If the eNodeB is to automatically enable the transmit and receive channels of the IF system at a specific time, set the PowerOnTime parameter. It is recommended that the parameter be set to a time when the traffic becomes high, for example, in the early morning.

After this function is enabled, the transmit and receive channels of the IF system of the eNodeB will be shut down and the eNodeB will not provide services.

9.4 Configuring Low Power Consumption Mode If the eNodeB is to reduce the transmit power of available services and reference signals and shut down some RF channels in a specified period after it enters the low power consumption mode, set the following parameters:

LowPwrStartTime LowPwrStopTime LowPwrServPowerRduTimer LowPwrSignalPowerRduTimer LowPwrRfShdTimer

To specify the reduced transmit power of available services and reference signals, set the following parameters:

LowPwrServPowerRduPercent LowPwrSignalPowerRduDelta

eRAN Energy Conservation and Emission Reduction 10 Parameters


10-1

10 Parameters

This chapter describes the parameters related to the energy conservation and emission reduction feature.

r, see Table 10-1. For the default value, value ranges, and M ommands of eac Table 10-2

T ter de

For the description of each parameteML c h parameter, see .

able 10-1 Parame scription (1)

MO Parameter ID Description

CellDbShdInfo DbShdSwitch tion for cells

is enabled. The dual-band intelligent

Indicates whether the dual-band intelligent shutdown func

shutdown function can be used in specific conditions only when this parameter is set to ON.

CellDbShdInfo DbShdStartTime ent shutdown for cells under the

same BBU. If the stop time is before or e

Indicates the start time of dual-band intellig

the same as the start time, the stop timis considered the same time of the next day.

CellDbShdInfo DbShdStopTime down for cells under the

same BBU. If the stop time is earlier

Indicates the stop time of dual-band intelligent shut

than or the same as the start time, the stop time is assumed to be the time of the next day.

10 Parameters eRAN



Issue 01 (2010-07-30)


CellDbShdInfo DbShdDlPrbCloseThd Indicates the close threshold of dual-band intelligent shutdown forcells. This threshold is based on the DL PRB utilization. When the aveUL and DL PRB utilization rates of a cell and its neighboring inter-frequecells are low

cell

rage

ncy er than the corresponding

close UL and DL PRB utilization rate threshold, the cell starts dual-band intelligent shutdown for cells.

CellDbShdInfo DbShdDlPrbOpenDelta Indicates the offset of the close threshold (based on cell DL PRB utilization) of dual-band intelligent shutdown for cells from the open threshold. The sum of this parameter and the close threshold is the open threshold.

CellDbShdInfo DbShdUlPrbCloseThd Indicates the close threshold of dual-band intelligent shutdown forcells. This threshold is based on the UL PRB utilization. When the aveUL and DL PRB utilization rates of a cell and its neighboring inter-frequecells are low

cell

rage

ncy er than the corresponding

UL and DL PRB utilization rate close threshold, the cell starts dual-band intelligent shutdown for cells.

CellDbShdInfo DbShdUlPrbOpenDelta

r

Indicates the offset of the open threshold (based on cell UL PRB utilization) of dual-band intelligent shutdown for cells from the close threshold. The sum of this parameteand the close threshold is the open threshold.

CellDbShdInfo DbShdCurrentState Indicates the current state of dual-band intelligent shutdown for the cell.

CellRfShdInfo RfShdSwitch Indicates whether the RF intelligent shutdown function for cells is enabled. The RF intelligent shutdown function can be used in specific conditions only when this parameter is set to ON.

CellRfShdInfo RfShdStartTime ent

ame time

Indicates the start time of RF intelligshutdown for cells. If the stop time is before or the same as the start time, the stop time is considered the sof the next day.



10-3


CellRfShdInfo RfShdStopTime Indicates the stop time of RFshutdown for cells. If the stop tibefore or the same as the start time, the stop time is considered the same time of the next day.

intelligent me is

CellRfShdInfo RfShdDelta e of the e RF

Indicates the increased valupower of reference signals when thTX channel is shut down.

CellRfShdInfo RfShdCurrentState Indicates the current state of RF intelligent shutdown for the cell.

CellLowPowerInfo LowPwrSwitch

w

Indicates the switch for the functionality of the low power consumption mode. Only if this switch is set to ON can the cell enter the lopower consumption mode when specific conditions are met.

CellLowPowerInfo LowPwrOrder

ON, the

e

OFF.

Indicates the switch for forcibly entering the low power consumption mode. If both this switch and the functionality switch are set toeNodeB enters the low power consumption mode directly irrespectivof whether it is in the low power consumption period. The eNodeB exitsthe low power consumption mode when either switch is set to

CellLowPowerInfo LowPwrStartTime Indicates the start time of the low power consumption mode. If the stoptime is earlier than or the same as the start time, the stop tim

e is assumed to be the time of the next day.

CellLowPowerInfo StopTime op

the same as the to

LowPwr Indicates the stop time of the low power consumption mode. If the sttime is earlier than or start time, the stop time is assumed be the time of the next day.

CellLowPowerInfo LowPwrServPowerRdu he Timer

Indicates the duration in which tavailable service transmit power is reduced in the cell in low power consumption mode.

CellLowPowerInfo LowPwrSignalPowerRd in which the uTimer

Indicates the durationreference signal transmit power isreduced in the cell in low power consumption mode.

10 Parameters eRAN



Issue 01 (2010-07-30)


CellLowPowerInfo LowPwrRfShdTimer Indicates the duration in which RFchannels are shut down in the cell in low power consumption mode.

CellLowPowerInfo LowPwrServPowerRdu tes the percentage by which the

mode.

Percent Indicatransmit power of available service is reduced in the cell in low power consumption

CellLowPowerInfo

LowPwrSignalPowerRduDelta

Indicates the value by which the reference signal transmit power is reduced in the cell in low power consumption mode.

CellLowPowerInfo LowPwrCurrentState the

Indicates whether the low power consumption mode has started andphase of the low power consumption mode.

CellAlgoSwitch DynAdjVoltSwitch sed to Indicates the switch that is uenable and disable the dynamic voltage adjustment.

eNodeB AUTOPOWEROFFSWITCH switch. When the eNodeB is powered

off automatically, the TX and RX channels of the RRUs/RFUs are shut down. In this case, the eNodeB works

pty l d cos ive. n the eNodeB is

automatically, the TX nels of the RRUs/RFUs ar d and the RRUs/RFUs start to w

Indicates the automatic power-on/off

in emWhe

oad an ts effectpowered on and RX chane openeork.

eNodeB PowerOffTime Indicates the automat er-off time.ic pow

eNodeB e s t mat PowerOnTim Indicate he auto ic power-on time.

T -2 ripable 10 Parameter desc tion (2)

MO Parameter Default GUI Value Actual Value Unit MML ID Value Range Range Command

CellDbDbShdSwitch OFF(Off) OFF(Off),

ON(On) OFF, ON None

ShdInfo

MODCELLDBSHDINFO

CellDb DbShdStartTi

0 00:00:00~23:59:59 00:00:00~23:59:59 None

ShdInfo me

MODCELLDBSHDINFO



10-5

MO Parameter ID

Default Value

GUI Value Range

Actual Value Range

Unit MML Command

CellDbShdInfo

DbShdStopTime 0.25 23:59 0~23:59:59 e 00:00:00~

:59 00:00:0 NonMOD CELLDBSHDINFO

CellDbShdInfo

DbShdDlPrbCloseThd 20 0~1 %

MOD CELLDBSHDINFO

0~100

CellDb DbShdDlPrbO 20 % MOD CELLDBSHDINShdInf

o penDelta 0~100 0~1 FO

CellDbShdInfo

DbShdUlPrbCloseThd 20 %

MOD CELLDBSHDINFO

0~100 0~1

CellDbShdInf DbShdUlPrbO

penDelta 20 0~1 % MOD CELLDBSHDIN

o 0~100

FO

CellDb DbShdCurrent None

LL(

STARTUP(Star

_SWITCH(User Switch),

DELETING(Deleting),

ESSING(Processing)

STARTUP, USER_SWITCH,

PROCESSING

None ShdInfo State

UNINSTAUninstall),

t-up), USER

RRU_SETTING(RRU Setting),

PROC

UNINSTALL,

RRU_SETTING, DELETING,

None

CellRfShdInfo

RfShdSwitch OFF(Off) OFF, ON None MOD CELLRFSHDINFO

OFF(Off), ON(On)

CellRf RfShdStartTi 0 59 None MOD CELLRFSHDINShdInf

o me 00:00:00~23:59:59 00:00:00~23:59:

FO

CellRfShdInfo

RfShdStopTime 0.25 None

MOD CELLRFSHDINFO

00:00:00~23:59:59 00:00:00~23:59:59

CellRfShdInf RfShdDelta 3 0~7 dB

MOD CELLRFSHDIN

o 0~7

FO

10 Parameters eRAN



Issue 01 (2010-07-30)

MO Parameter Default GUI Value Actual Value Unit ID Value Range Range

MML Command

CellRfShdInfo

RfShdCurrentState None

L(

P(Start-up),

U Setting), POWER_RECF

nal Power Reconfiguring), DELETING(De

RRU_SETTING, POWER_RECFGI

None

UNINSTALUninstall), STARTU

RRU_SETTING(RR

GING(Reference Sig

leting)

UNINSTALL, STARTUP,

NG, DELETING

None

CellLowPowerInfo

LowPwrSwitch OFF(Off) OFF(Off), OFF, ON None OWPOWON(On)

MOD CELLLERINFO

CellLowPowerInfo

LowPwrOrder OFF(Off) OFF(Off), OFF, ON None OWPOWON(On)

MOD CELLLERINFO

CellLowPowerInfo

LowPwrStartTime 0 00:00:00~23:59 00:00:00~23:59:59 None OWPOW:59

MOD CELLLERINFO

CellLowPowerInfo

LowPwrStopTime 0.25 00:00:00~23:59 00:00:00~23:59:59 None OWPOW:59

MOD CELLLERINFO

CellLowPowerInfo

wPwrServPowerRduTimer

120 0~1440 0~1440 min CELLLOWPOWERINFO

Lo MOD

CellLowPowerInfo

LowPwrSignalPowerRduTimer

120 0~1440 0~1440 min MOD CELLLOWPOWERINFO

CellLowPowerInfo

LowPwrRfShdTimer 120 0~1440 0~1440 min

MOD CELLLOWPOWERINFO

CellLowPowerInfo

LowPwrServPowerRduPercent

50 10~100 0.1~1 % MOD CELLLOWPOWERINFO

CellLowPowerInfo

LowPwrSignalPowerRduDelta

-1 -10~0 -10~0 dB MOD CELLLOWPOWERINFO



10-7

MO Parameter ID

Default Value

GUI Value Range

Actual Value Range

Unit MML Command

CellLowPowerInfo

LowPwrCurrentState None

UNINSTALL(Uninstall), SERVICE_POWER_REDUCING(Usable Service Power Reducing), REDUCE_SERVICE_POWER(Reduce Usable Service Power), SIGNAL_POWER_REDUCING(Signal Power Reducing), REDUCE_SIGNAL_POWER(Reduce Signal Power), RFSHD_RRUSETTING(RF Shutdown RRU Setting), RFSHD(RF Shutdown), DUALBANDSHD_RRUSETTING(Dual-band Shutdown RRU Setting), DUALBANDSHD(Dual-band Shutdown), DELETING(Deleting)

UNINSTALL, SERVICE_POWER_REDUCING, REDUCE_SERVICE_POWER, SIGNAL_POWER_REDUCING, REDUCE_SIGNAL_POWER, RFSHD_RRUSETTING, RFSHD, DUALBANDSHD_RRUSETTING, DUALBANDSHD, DELETING

None None

CellAlgoSwitch

DynAdjVoltSwitch

DynAdjVoltSwitch:Off

DynAdjVoltSwitch( DynAdjVoltSwitch)

DynAdjVoltSwitch None

MOD CELLALGOSWITCH

eNodeB

AUTOPOWEROFFSWITCH

OFF ON, OFF ON, OFF None MOD ENODEB

eNodeB

PowerOffTime 0 22:00:00~5:00:

00 22:00:00~5:00:00 None MOD ENODEB

eNodeB PowerOnTime 0.25 23:00:00~6:00:

00 23:00:00~6:00:00 None MOD ENODEB

eRAN Energy Conservation and Emission Reduction 11 Counters


11-1

11 Counters

For details about the performance counters related to the energy conservation and emission reduction feature, see the eNodeB Performance Counter Reference.

eRAN Energy Conservation and Emission Reduction 12 Glossary


12-1

12 Glossary

12.1 Terms

12.2 Acrony and Abbreviatio er

PRB Physical Resource Block

TCO Total Cost of Operation

None.

ms ns ARPU Average Revenue Per Us

eRAN Energy Conservation and Emission Reduction 13 Reference Documents


13-1

13 Reference Documents

This chapter lists the reference documents related to the energy conservation and emission

eter Description tion

rameter Description ] M2000 Operation Guide

[5] eNodeB Performance Counter Reference [6] eNodeB MO Reference

reduction feature:

[1] Scheduling Feature Param[2] Power Control Feature Parameter Descrip[3] Load Control Feature Pa[4

Energy Conservation and Emission Reduction Feature Parameter Description(ERAN2.0_01)

Documents

Transcript of Energy Conservation and Emission Reduction Feature Parameter Description(ERAN2.0_01)