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HUAWEI BSC6000 Base Station Subsystem

V900R008

Intelligent Power Consumption Decrease

Issue 02

Date 2008-06-30

Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd

INTERNAL


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Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For any

assistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

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Website: http://www.huawei.com

Email: [email protected]

Copyright Huawei Technologies Co., Ltd. 2008. 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.

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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 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 the statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Proprietary and Confidential

http://www.huawei.com/mailto:[email protected]:[email protected]://www.huawei.com/


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Contents

1 Intelligent Power Consumption Decrease............................................................................1-1

1.1 Overview.........................................................................................................................................................1-2

1.2 Availability......................................................................................................................................................1-3

1.3 Technical Description.....................................................................................................................................1-4

1.3.1 Intelligent Power Consumption Decrease Configured with the TRX Module......................................1-5

1.3.2 Intelligent Power Consumption Decrease Not Configured with the TRX Module...............................1-6

1.3.3 Intelligent Shutdown of the TRX Power Amplifier...............................................................................1-6

1.3.4 Intelligent Shutdown of the TRX Power Amplifier and Channel Assignment......................................1-7

1.4 Implementation................................................................................................................................................1-7

1.4.1 Configuring Intelligent Power Consumption Decrease.........................................................................1-7

1.5 Maintenance Information..............................................................................................................................1-11

1.6 References.....................................................................................................................................................1-11


Intelligent Power Consumption Decrease Contents

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Figures

Figure 1-1 Triger Saving Power Function tab page.............................................................................................1-9

Figure 1-2 Set Cell Attributes dialog box..........................................................................................................1-10

Figure 1-3 Configure TRX Attributes dialog box..............................................................................................1-11


Intelligent Power Consumption Decrease Figures



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Tables

Table 1-1 NEs involved in intelligent power consumption decrease...................................................................1-3

Table 1-2 GBSS products and software versions.................................................................................................1-3


Intelligent Power Consumption Decrease Tables



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1 Intelligent Power Consumption DecreaseAbout This Chapter

1.1 Overview

Intelligent power consumption decrease is to decrease the power consumption of the BTS in idle

time periods.

1.2 Availability

This lists the NEs and software required for the implementation of intelligent power consumption

decrease.

1.3 Technical DescriptionIntelligent power consumption decrease refers to a technique in which the system can decrease

power consumption by adjusting the working voltage of the configured TRX module, shutting

down the power amplifier configured with the TRX module when the TRX module is idle, or

shutting down the power amplifier not configured with the TRX module.

1.4 Implementation

This describes how to configure intelligent power consumption decrease on BSCs, cells, and

TRX modules.

1.5 Maintenance Information

The relevant maintenance information on intelligent power consumption decrease is not

available.

1.6 References

None.


Intelligent Power Consumption Decrease 1 Intelligent Power Consumption Decrease



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1.1 Overview

Intelligent power consumption decrease is to decrease the power consumption of the BTS in idle

time periods.

Definition

Intelligent power consumption decrease applies to the following scenarios:

l For the BTS main equipment that does not process services, the dormant mode is started

to decrease the power consumption.

l When the BTS main equipment operates normally and processes services, intelligent power

consumption decrease is performed to decrease the power consumption of the BTS in the

same coverage.

Huawei BSS products implement intelligent power consumption decrease through the following

methods:

l Power-off of power amplifier on the timeslot level

l Intelligent voltage adjustment

l Preferential assignment of the BCCH

For details about the preferential assignment of the BCCH, see Channel Management.

l Power control

For details about power control, see Power Control.

l DTX

For details about DTX, see Discontinuous Transmission and Discontinuous

Reception.

l Use of industry-leading power amplifiers

Purposes

When the traffic is light, the power amplifiers of idle TRX modules are shut down to decrease

the power consumption of the BTS.

In the current network, many cells are in the idle state in most of time of a day. Thus, part of

TRX modules are sufficient for carrying the existing traffic. In such a case, the power amplifiers

of extra TRX modules can be shut down to save more power. As a result, the operator's operationexpenditure is greatly reduced.

Terms

Term Definition

GMSK modulation mode Gaussion Minimum Shift Keying modulation

mode

XMU General name for BTS3012 DTMU,

BTS3012AE DTMU, BTS3006C DMCM,

and BTS3002E DMCM

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Product Version

QTRU BTS3000V100R004C02 and later releases

BTS3012AE DTRU BTS3000V100R001C07 and later releases

QTRU BTS3000V100R004C02 and later releases

BTS3006C BTS3000V100R001C07 and later releases

BTS3002E BTS3000V100R001C07 and later releases

DBS3900 GSM BTS3000V100R008C01 and later releases

BTS3900 GSM BTS3000V100R008C02 and later releases

BTS3900A GSM BTS3000V100R008C02 and later releases

Miscellaneous

None.

1.3 Technical Description

Intelligent power consumption decrease refers to a technique in which the system can decrease

power consumption by adjusting the working voltage of the configured TRX module, shutting

down the power amplifier configured with the TRX module when the TRX module is idle, or

shutting down the power amplifier not configured with the TRX module.

Dynamic Voltage Adjustment

Dynamic voltage adjustment is a preferred option for the configured TRX module.

The actual working voltage of the TRX module is adjusted according to the following

configurations:

l Site type

Macro BTS or mini BTS

l

Power types of the TRX modulel Modulation mode of the TRX module

GMSK modulation mode or 8PSK modulation mode

l Frequency band types of the TRX module

l Static power class configured for the TRX module

Intelligent Shutdown of the Power Amplifier

Based on the traffic volume, the BSC determines whether to issue a command to switch off the

power amplifier of the TRX module to decrease the power consumption of a BTS.

1.3.1 Intelligent Power Consumption Decrease Configured with the TRX Module






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This describes the conditions and process of dynamic voltage adjustment, intelligent shutdown

of the power amplifier, and power-on of the power amplifier in case one or two carriers are

configured.

1.3.2 Intelligent Power Consumption Decrease Not Configured with the TRX Module

Intelligent power consumption decrease not configured with the TRX module refers to intelligentshutdown of the power amplifier.

1.3.3 Intelligent Shutdown of the TRX Power Amplifier

When selecting TRX modules to be shut down, you need to select the ones that have the longest

operation interval and are beyond the power-on protection period to avoid frequent power-on

or shutdown of the TRX power amplifier.

1.3.4 Intelligent Shutdown of the TRX Power Amplifier and Channel Assignment

The BSC attempts to assign busy channels to a small number of TRX modules and assign calls

to the TRX modules that cannot be dynamically shut down. Therefore, call drops and handover

times decrease when TRX power amplifiers are shut down.

1.3.1 Intelligent Power Consumption Decrease Configured with theTRX Module

This describes the conditions and process of dynamic voltage adjustment, intelligent shutdown

of the power amplifier, and power-on of the power amplifier in case one or two carriers are

configured.

Dynamic Voltage Adjustment

Different from the BTS without the TRX module, the BTS with the TRX module needs voltage

adjustment.

The modulation modes used by the TRX module are categorized into the following types:

l GMSK modulation mode

In GMSK modulation mode, the decrease of working voltage in a permissible range does

not affect the output power of the power amplifier. Adjusting the working voltage of the

power amplifier can improve the efficiency of the power amplifier and decrease power

consumption.

l 8PSK modulation mode

You can determine that the TRX module operates in 8PSK modulation mode only when

the following conditions are met:

The TRX supports the EDGE service.

More than one PDCH channel is available.

Intelligent Shutdown of the Power Amplifier

After the service of intelligent power consumption decrease is enabled, the system checks the

configuration of the TRX module configured with only one carrier within 10 minutes. In such

a case, the TRX module can close an unconfigured carrier to save power.

The system switches off the power amplifier of the configured TRX module in the following

situations:

l The XMU issues a command to shut down a power amplifier.





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l The TRX module is locked.

l A critical alarm is generated on the TRX module.

Once the system detects that a power amplifier is in the closed state for one minute, the system

shuts down the power amplifier. This is the mode of delaying the shutdown of a power amplifier.

Power-on of the TRX Power Amplifier

The TRX module immediately switches on the power amplifier of a carrier only when the

following conditions are met and the power amplifier is not switched on repeatedly within one

minute:

l Critical alarms are not generated or are already cleared on the TRX module.

l The XMU does not issue a command to shut down a power amplifier or the XMU issues

a command to switch on a power amplifier.

l The TRX module is not locked or the TRX is unlocked.

1.3.2 Intelligent Power Consumption Decrease Not Configuredwith the TRX Module

Intelligent power consumption decrease not configured with the TRX module refers to intelligent

shutdown of the power amplifier.

The shutdown of the power amplifier not configured with the TRX module is also called

immediate shutdown.

NOTE

For details about how to switch on the power amplifier, see 1.3.1 Intelligent Power ConsumptionDecrease Configured with the TRX Module.

1.3.3 Intelligent Shutdown of the TRX Power Amplifier

When selecting TRX modules to be shut down, you need to select the ones that have the longest

operation interval and are beyond the power-on protection period to avoid frequent power-on

or shutdown of the TRX power amplifier.

You need to record the time of each operation on a TRX module. The operation interval indicates

the period between the last operation time and the current operation time.

Periodically, the BSC checks whether a cell has sufficient idle channels. If sufficient idle

channels are available for a TRX module in a period, select to shut down the power amplifier

of the TRX module.

The TRX module whose power amplifier should be shut down must meet the following

conditions:

l The TRX module is in the Normal TRX state.

l The maximum operation interval of the TRX module is greater than TRX Power-on

Protection Time (in Second).

l After the TRX module is shut down, an idle SDCCH is available for this cell.

l There is no packet traffic channel on the TRX module.

l The channel that is experiencing type change does not exist on the TRX module.






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As the dynamic power-on of the TRX power amplifier performed on the BTS may be delayed,

the periodic check forNumber of Reserved Idle Channels is added. If the number of idle TCHs

in a cell is smaller than Number of Reserved Idle Channels, the BTS switches on the power

amplifier of a TRX module. The BTS can shut down the power amplifier of the TRX module

only when the number of idle SDCCHs is greater than Idle SDCCH Threshold N1.

A concentric cell may cause the forcible handover for intelligent shutdown of the TRX power

amplifier or the ping-pong handover of a concentric circle. Therefore, the BSC can issue a

command to the BTS to shut down the power amplifier of the TRX module in a concentric cell

even though calls are available on the TRX module. When the BTS detects that calls are not

available on the TRX module, the BTS shuts down the power amplifier of the TRX module.

1.3.4 Intelligent Shutdown of the TRX Power Amplifier andChannel Assignment

The BSC attempts to assign busy channels to a small number of TRX modules and assign calls

to the TRX modules that cannot be dynamically shut down. Therefore, call drops and handovertimes decrease when TRX power amplifiers are shut down.

To avoid the conflict between the channel type change and the shutdown of a power amplifier,

prohibit the shutdown of the associated power amplifier during the channel type change.

When some TRX modules are idle, the BSC shuts down the power amplifiers of these TRX

modules. When the traffic is heavy, the BSC needs to switch on the power amplifiers of some

TRX modules in an effort to avoid channel congestion.

If the BSC detects that the power amplifier of a TRX module where the directly assigned channels

or dynamically adjusted channels are located is shut down when the BSC assigns channels, the

BSC issues a command to the BTS, requesting the power-on of the power amplifier.

NOTE

For details about the channel assignment algorithm, see Channel Management.

1.4 Implementation

This describes how to configure intelligent power consumption decrease on BSCs, cells, and

TRX modules.

1.4.1 Configuring Intelligent Power Consumption DecreaseThis describes how to configure intelligent power consumption decrease on the BSC6000 Local

Maintenance Terminal.

1.4.1 Configuring Intelligent Power Consumption Decrease

This describes how to configure intelligent power consumption decrease on the BSC6000 Local

Maintenance Terminal.

Prerequisite

When the BSC enables the intelligent shutdown of the power amplifier, the BTS checks onlythe circuit-based services.





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Before configuring Allow the Shutdown of the TRX Power Amplifier on the TRX module,

ensure that the TRX module meets the following conditions:

l The non-primary BCCH is located on the TRX module.

l The dynamic or static PDCH does not exist.

l Antenna hopping or frequency hopping is not enabled.

NOTE

During a BTS deployment test, set Allow Dynamic Shutdown of TRX Power Amplifier to No on the

BSC6000 Local Maintenance Terminal.

Procedure

Step 1 On the BSC, configure the intelligent shutdown of the power amplifier.

NOTE

On some special days, such as holidays, do not shut down the power amplifiers of TRX modules.For the dates when the intelligent shutdown of power amplifiers is allowed, you need to set a time segment

for each date. You can set 12 dates.

1. On the Management Tree tab page of the BSC6000 Local Maintenance Terminal, right-

clickBSC6000, and then choose Configure BSC Attributes from the shortcut menu.

2. In the displayed dialog box, click the Triger Saving Power Function tab, as shown in

Figure 1-1.

Configure Allow Dynamic Shutdown of TRX Power Amplifier, Time When the

Function Is Enabled (HH: MM), Time When the Function Is Disabled (HH: MM),

Time for TRX Power-on Protection (in Second), and Number of Reserved Idle

Channels.

NOTE

In the Prohibit Close TRX Power Amplifier pane shown in Figure 1-1, set the dates on which the

TRX power amplifier cannot be closed.






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Figure 1-1 Triger Saving Power Function tab page

3. Click Finish. A dialog box is displayed.

4. Click Yes to complete the configuration.

Step 2 Configure intelligent power consumption decrease for cells.


click a cell, and then choose Configure Cell Attributes from the shortcut menu.

2. In the displayed dialog box, double-click the target cell in the Cell view list box to add it

to the Selected cells list box. Then, clickNext.

3. In the Cells to be set list box, select the target cell, and then clickSet Cell Properties. A

dialog box is displayed, as shown in Figure 1-2.

Select Allow Dynamic Voltage Adjustment and Allow Dynamic Shutdown of TRX

Power Amplifier.





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Figure 1-2 Set Cell Attributes dialog box

Step 3 On the TRX module, configure the intelligent shutdown of the power amplifier.


click the target TRX, and then choose Configure TRX Attributes from the shortcut menu.

2. In the displayed dialog box, select the target TRX, and then clickConfigure TRX

Attributes.

3. Click the Device Attributes tab and set Allow Shutdown of TRX Power Amplifier to

Yes, as shown in Figure 1-3.






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Figure 1-3 Configure TRX Attributes dialog box

4. Click OKto complete the configuration.

----End

1.5 Maintenance Information

The relevant maintenance information on intelligent power consumption decrease is not

available.

Alarms

None.

CountersNone.

1.6 References

None.




Copyright Huawei Technologies Co Ltd

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