Fast Power Congestion Control(RAN13.0_01)

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WCDMA RAN

Fast Power Congestion Control

Feature Parameter Description

Issue 01

Date 2011-04-30

HUAWEI TECHNOLOGIES CO., LTD.



Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within the

purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,

and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

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

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 01 (2011-04-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

http://www.huawei.com/



Contents

1 About This Document..................................................................................................................1

1.1 Scope..............................................................................................................................................................................1

1.2 Intended Audience..........................................................................................................................................................1

1.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................3

3 Technical Description...................................................................................................................4

4 Parameters.......................................................................................................................................5

5 Counters..........................................................................................................................................6

6 Glossary...........................................................................................................................................7

7 Reference Documents...................................................................................................................8

WCDMA RAN

Fast Power Congestion Control Feature Parameter

Description Contents



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1 About This Document

1.1 Scope

This document describes WRFD-010208 Fast Power Congestion Control (FCC).

1.2 Intended Audience

This document is intended for personnel who:

l Need to understand the features described herein

lWork with Huawei products

1.3 Change History

This section provides information about the changes in different document versions. There are

two types of changes, which are defined as follows:

l Feature change

Changes in features of a specific product version

l Editorial change

Changes in wording or addition of information that was not described in the earlier version

01 (2011-04-30)

This issue does not include any changes.

Draft B (2011-03-30)

This issue does not include any changes.

WCDMA RAN


Description 1 About This Document



1



Draft A (2010-12-30)

Compared with Issue 01 (2010-03-30) of RAN12.0, Draft A (2010-12-30) of RAN13.0

optimizes the description.

WCDMA RAN


Description 1 About This Document



2



2 Overview

Fast power congestion control (FCC) is implemented on the NodeB side. This feature aims to

quickly rectify the system overload situation to prevent the output power from exceeding the

maximum power allowed by hardware.

This feature enables efficient utilization of power amplifiers for traffic load, especially for

dynamic power sharing in one carrier between R99 and HSDPA.

WCDMA RAN


Description 2 Overview



3



3 Technical Description

FCC is a NodeB function that complements RNC congestion control. The function monitors the

output power per slot that all users demand at the same time, using the real time scale as the fast

power control function.

Huawei provides the DL automatic level control (ALC) function for fast power congestion

control in the NodeB, in order to limit output power and avoid PA saturation. The ALC monitors

the transmit power in real time. When the input power reaches or exceeds the predefined

threshold, the ALC can decrease the signals on TX channels by increase attenuation to keep the

output power lower than the threshold, thus avoiding PA saturation.

The NodeB uses FCC to quickly control the output power, the control reaction time is 1024

chips, which is fast enough to fully prevent saturation of the TX chain or overdriving of PAs

without the need for power margins.

Therefore, when a cell is heavily loaded, its performance remains robust, without the risk of call

drops or inaccurate modulation. In addition, the RNC congestion and admission thresholds can

be set to higher levels, which increase cell capacity without compromising overall quality of

service.

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Description 3 Technical Description



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4 Parameters

There are no specific parameters associated with this feature.

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Description 4 Parameters



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5 Counters

There are no specific counters associated with this feature.

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Description 5 Counters



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6 Glossary

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

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Description 6 Glossary



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7 Reference Documents

There are no specific reference documents associated with this feature.

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Description 7 Reference Documents



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