Flexible Dual Carrier HSDPA(RAN16.0_02)

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WCDMA RAN

Flexible Dual Carrier HSDPA Feature

Parameter Description

Issue 02

Date 2015-01-30

HUAWEI TECHNOLOGIES CO., LTD.


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Copyright © Huawei Technologies Co., Ltd. 2015. 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 02 (2015-01-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

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Contents

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

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

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

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

1.4 Differences Between Base Station Types.......................................................................................................................3

2 Overview.........................................................................................................................................4

2.1 Introduction....................................................................................................................................................................4

2.2 Benefits...........................................................................................................................................................................5

2.3 Feature Capabilities........................................................................................................................................................5

2.3.1 Multi-Carrier HSDPA Technologies...........................................................................................................................5

2.3.2 Cells Candidate for a Multi-Carrier Cell Group..........................................................................................................6

2.3.3 Configuration of Multi-Carrier Cell Groups...............................................................................................................7

3 Technical Description...................................................................................................................83.1 Overview........................................................................................................................................................................9

3.1.1 Impacts on Protocol Entities........................................................................................................................................9

3.1.2 Requirements for NEs.................................................................................................................................................9

3.1.3 Impacts on RRM Functions.......................................................................................................................................10

3.2 Load Control.................................................................................................................................................................11

3.2.1 Load Measurement....................................................................................................................................................11

3.2.2 DRD...........................................................................................................................................................................12

3.2.3 CAC...........................................................................................................................................................................13

3.2.4 Queuing and Preemption...........................................................................................................................................153.2.5 LDR and OLC...........................................................................................................................................................16

3.3 Dynamic Cell Shutdown...............................................................................................................................................16

3.4 Multi-Car rier HSDPA Scheduling................................................................................................................................16

3.5 Activation and Deactivation of Supplementary Carrier...............................................................................................17

4 Related Features...........................................................................................................................18

4.1 Prerequisite Features.....................................................................................................................................................18

4.2 Mutually Exclusive Features........................................................................................................................................18

4.3 Impacted Features.........................................................................................................................................................18

5 Network Impact...........................................................................................................................20

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6 Engineering Guidelines.............................................................................................................21

6.1 When to Use Flexible Dual Carrier HSDPA................................................................................................................21

6.2 Required Information...................................................................................................................................................21

6.3 Planning........................................................................................................................................................................21

6.3.1 RF Planning...............................................................................................................................................................21

6.3.2 Network Planning......................................................................................................................................................22

6.3.3 Hardware Planning....................................................................................................................................................23

6.4 Deployment..................................................................................................................................................................24

6.4.1 Process.......................................................................................................................................................................24

6.4.2 Requirements.............................................................................................................................................................25

6.4.3 Data Preparation........................................................................................................................................................26

6.4.4 Precautions.................................................................................................................................................................27

6.4.5 Activation..................................................................................................................................................................27

6.4.6 Activation Observation..............................................................................................................................................30

6.4.7 Deactivation...............................................................................................................................................................32

6.5 Performance Monitoring...............................................................................................................................................35

6.5.1 Factors Affecting Feature Benefits............................................................................................................................35

6.5.2 Feature Benefits Monitoring......................................................................................................................................35

6.6 Parameter Optimization................................................................................................................................................36

6.7 Troubleshooting............................................................................................................................................................36

7 Parameters.....................................................................................................................................37

8 Counters........................................................................................................................................59

9 Glossary.........................................................................................................................................65

10 Reference Documents...............................................................................................................66

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1 About This Document

1.1 Scope

This document describes the WRFD-150208 Flexible Dual Carrier HSDPA, including its

technical principles, related features, network impact, and engineering guidelines.

This document applies to the following NE types.

NE Type NE Model

RNC BSC6900, BSC6910

NodeB Macro 3900 series macro base stations: BTS3900, BTS3900A,

BTS3900L, BTS3900AL, DBS3900, BTS3900C

3800 series macro base stations: DBS3800, BTS3812E,

BTS3812AE

Micro Not supported

LampSite Not supported

1.2 Intended AudienceThis document is intended for personnel who:

l Need to understand the features described herein

l Work 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:

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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

RAN16.0 02 (2015-01-30)

This issue includes the following changes.

ChangeType

Change Description Parameter Change

Feature

change

None None

Editorialchange

Revised the requirements for cells to become candidates for a multi-carrier

cell group. For details, see section

"2.3.2 Cells Candidate for a Multi-

Carrier Cell Group."

None

RAN16.0 01 (2014-04-30)

This issue does not include any change.

RAN16.0 Draft B (2014-02-28)

This issue includes the following changes.

ChangeType


Feature

change

None None

Editorial

change

For details about feature support and

function implementation differences

between base station types, see "1.4

Differences Between Base Station

Types."

None

RAN16.0 Draft A (2014-01-20)

Compared with issue 02 (2013-06-30) of RAN15.0, Draft A (2014-01-20) of RAN16.0 includes

the following changes.

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ChangeType


Feature

change

This feature can be batch activated

using the CME. For details, seesection Using the CME (Method

1).

None

Editorial

change

None None

1.4 Differences Between Base Station Types

Feature Support by Macro, Micro, and LampSite Base Stations

Feature

ID

Descripti

on

Supported by

Controller(Y/N/NA)

Supporte

d by

Macro

(Y/N/

NA)

Supported by Micro

(Y/N/NA)

LampSit

e

BSC690

0

BSC691

0

BTS380

3E

BTS390

2E

WRFD-

150208

Flexible

Dual

Carrier HSDPA

Y Y Y N N N

NOTE

Y indicates that a feature is supported; N indicates that a feature is not supported; NA indicates that an NE is

not involved, that is, a feature does not require the support of the NE.

Only macro base stations support the features described in this document.

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2 Overview

2.1 Introduction

As mobile communication services continue to develop, users have increasingly high

requirements for downlink throughput. Multi-carrier HSDPA technologies enable UEs to set up

HSDPA connections with multiple carriers, which increases the single-user downlink

throughput.

Before the Flexible Dual Carrier HSDPA feature was introduced, carriers that meet certain

requirements could only form DC-HSDPA groups, and one carrier could belong to only one

group. Therefore, multi-carrier HSDPA technologies could not be flexibly applied, and

frequency resources were not fully utilized.

NOTE

l SC-HSDPA is short for Single-Carrier High Speed Downlink Packet Access.

l DC-HSDPA is short for Dual-Carrier High Speed Downlink Packet Access.

Now, with introduction of the Flexible Dual Carrier HSDPA feature, inter-frequency co-

coverage cells that meet certain requirements can form a multi-carrier cell group, and cells in

the multi-carrier cell group work in resource pool mode. The RNC dynamically selects cells

from the group based on HSPA+ technical satisfaction, service requirements, and network load

to construct DC-HSDPA groups for different UEs to fulfill their service requirements.

NOTE

For details about HSPA+ technical satisfaction, see Directed Retry Decision Feature Parameter

Description.

Figure 2-1 shows an example of cell group configuration with and without Flexible Dual Carrier

HSDPA.

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Figure 2-1 Example of cell group configuration with and without the Flexible Dual Carrier

HSDPA feature

Figure 2-1 assumes that an operator has three inter-frequency co-coverage cells: F1, F2, and

F3. Before the Flexible Dual Carrier HSDPA feature was deployed, two cells F1 and F2 formed

one DC-HSDPA group and the third cell F3 worked as an SC-HSDPA cell. With the Flexible

Dual Carrier HSDPA feature, the three cells F1, F2, and F3 can form a multi-carrier cell group,and cells in the multi-carrier cell group can flexibly form three DC-HSDPA groups for the

HSDPA transmission of different UEs.

NOTE

In the example shown in Figure 2-1, three carriers are used. The number of carriers in actual networking

can be three or four.

2.2 Benefits

The Flexible Dual Carrier HSDPA feature dynamically uses instantaneous idle resources in a

cell, increasing the UE data rate and system capacity. In the case of three carriers, this feature

increases the UE data rate by up to 20% when UEs are processing burst services. The feature

gain is affected by the proportion of UEs supporting the multi-carrier HSDPA technologies.

This feature enables a smooth evolution between multi-carrier HSDPA technologies by

configuring multi-carrier cell groups.

2.3 Feature Capabilities

2.3.1 Multi-Carrier HSDPA TechnologiesThe Flexible Dual Carrier HSDPA feature supports the following multi-carrier HSDPA

technologies:

l DC-HSDPA

l DC-HSDPA+MIMO

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NOTICE

If the Flexible Dual Carrier HSDPA feature is used with the WRFD-010684 2×2 MIMO feature,

the Primary/Secondary common Pilot (PSP) mode must be used. For details, see MIMO Feature Parameter Description.

The Flexible Dual Carrier HSDPA feature flexibly allocates different DC-HSDPA groups to

different UEs.

NOTE

For details about how to enable the DC-HSDPA feature, see DC-HSDPA Feature Parameter

Description.

Figure 2-2 shows an example of using the Flexible Dual Carrier HSDPA feature and multi-

carrier HSDPA technology together.

Figure 2-2 Example of using the Flexible Dual Carrier HSDPA feature and multi-carrier HSDPA

technology together

2.3.2 Cells Candidate for a Multi-Carrier Cell GroupThis section describes the requirements for cells to become candidates for a multi-carrier cell

group.

Coverage

Cells in a multi-carrier cell group must belong to the same sector of a NodeB and must be inter-

frequency co-coverage cells. Each multi-carrier cell group must have three or four inter-

frequency cells.

For DBS3800 and 3900 series base stations, each sector must have three or four inter-frequency

cells, and these cells must be served by the same BBU.

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Frequency Bands, Frequencies, and Bandwidth

l A multi-carrier cell group consists of a maximum of four cells. The cells in a multi-carrier

cell group must operate in the same frequency band.

l Cells in the same frequency band can use adjacent frequencies or non-adjacent frequencies.

NOTE

When cells in the same frequency band use non-adjacent frequencies, UEs must support non-adjacent

frequencies.

Cell HSPA+ Capability

l Cells in a multi-carrier cell group must have the Flexible Dual Carrier HSDPA feature

enabled.

l In a multi-carrier cell group, cells in the same frequency band must have either the

WRFD-010696 DC-HSDPA or WRFD-010699 DC-HSDPA+MIMO feature enabled.

Others

l For macro cells enabled with the Multiple RRUs in One Cell feature, one cell can belong

to a maximum of three multi-carrier cell groups. This is because sectors with cells enabled

with the Multiple RRUs in One Cell feature generally have an overlapping coverage area

with two or three common sectors. For other types of cells, one cell can belong to only one

multi-carrier cell group.

l Cells in a multi-carrier cell group have the same time offset (specified by the Tcell

(BSC6900,BSC6910) parameter).

NOTE

Tcell(BSC6900,BSC6910) specifies the difference between the System Frame Number (SFN) and NodeBFrame Number (BFN) of the NodeB that the cells belong to. Tcell(BSC6900,BSC6910) is set in the MOD

UCELLSETUP command.

2.3.3 Configuration of Multi-Carrier Cell Groups

To configure a multi-carrier cell group, perform the following steps:

Step 1 Run the NodeB MML command ADD NODEBMULTICELLGRP to add a multi-carrier cellgroup. In this step, specify MULTICELLGRPID and set MULTICELLGRPTYPE to

HSDPA.

Step 2 Run the NodeB MML command ADD NODEBMULTICELLGRPITEM multiple times toadd local cells to the multi-carrier cell group.

----End

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3 Technical DescriptionThis chapter describes the technical details about the Flexible Dual Carrier HSDPA feature. For

details about DC-HSDPA, DB-HSDPA, and 4C-HSDPA, see DC-HSDPA Feature Parameter

Description..

Unless otherwise specified, "multi-carrier HSDPA" referred to in this document indicates DC-

HSDPA and combinations of DC-HSDPA and other techniques, for example, DC-HSDPA

+64QAM.

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3.1 Overview

This section describes the impacts of Flexible Dual Carrier HSDPA on protocol entities,requirements for network elements (NEs), and impacts on radio resource management (RRM)

functions.

3.1.1 Impacts on Protocol Entities

Figure 3-1 shows the protocol entities affected by the Flexible Dual Carrier HSDPA feature.

Figure 3-1 Protocol entities affected by the Flexible Dual Carrier HSDPA feature

The Flexible Dual Carrier HSDPA feature affects the NodeB application part (NBAP) entity on

the control plane and the MAC-ehs entity on the user plane as follows:

l NBAP entity

– Cell capability reporting: The NodeB reports the list of candidate secondary cells to the

RNC.

– Radio link (RL) setup and reconfiguration: The RNC sends information about primary

and secondary cells to the NodeB.

l MAC-ehs entity

The Flexible Dual Carrier HSDPA feature affects the scheduling function of the MAC-ehs

entity.

Each UE is assigned a MAC-ehs entity. Before the Flexible Dual Carrier HSDPA feature is

introduced, the MAC-ehs entity assigned to a DC-HSDPA UE performs joint scheduling

between the primary and secondary cells. After the Flexible Dual Carrier HSDPA feature is

introduced, the NodeB supports joint scheduling for all DC-HSDPA UEs in different cells.

3.1.2 Requirements for NEs

Table 3-1 describes the requirements of the Flexible Dual Carrier HSDPA feature for NEs.

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Table 3-1 Requirements for NEs

NE Requirement

CN None

RNC The RNC must select the primary and secondary cells for UEs based on the

information about candidate secondary cells reported by the NodeB. The RNC

also performs multi-carrier HSDPA load control and scheduling. For details, see

section 3.1.1 Impacts on Protocol Entities.

NodeB l The NodeB must determine the list of candidate secondary cells for each cell

based on the configured multi-carrier cell groups and report the primary and

secondary cell information to the NodeB over the Iub interface.

l The NodeB must perform joint scheduling between the primary and secondary

cells for a single UE.

UE UEs must support at least one multi-carrier HSDPA technology and must belongto HS-DSCH category 21 or higher.

The Flexible Dual Carrier HSDPA feature requires support from NEs. Details are as follows:

The NodeB reports the multi-carrier HSDPA capability of each cell and the list of candidate

secondary cells for each cell over the Iub interface.

l The RNC determines the multi-carrier HSDPA capability of a UE based on the information

reported by the UE.

l The RNC selects a radio bearer and appropriate primary and secondary cells for the UE.

The RNC then sends the bearing information to the NodeB and UE.

l After the radio bearer is set up, the NodeB performs joint scheduling for the UE between

the primary and secondary cells.

3.1.3 Impacts on RRM Functions

Table 3-2 describes the impacts on RRM functions: radio bearer, load control, dynamic cell

shutdown, scheduling, and secondary carrier activation/deactivation.

Table 3-2 Impacts on RRM functions

Function Impact See Section…

Radio bearer The Flexible Dual Carrier HSDPA feature brings no

change to the radio bearer policy, compared with DC-

HSDPA.

N/A

Load control The Flexible Dual Carrier HSDPA feature affects load

measurement, call admission control (CAC), directed

retry decision (DRD), queuing, preemption, load

reshuffling (LDR), and overload control (OLC).

3.2 Load Control

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Function Impact See Section…

Dynamic cell

shutdown

After the Flexible Dual Carrier HSDPA feature is

introduced, the RNC determines whether to

dynamically shut down a secondary cell based on cellload and the number of DC-HSDPA users in the cell.

3.3 Dynamic Cell

Shutdown

Scheduling The NodeB performs joint scheduling for DC-HSDPA

UEs between the primary and secondary cells.

3.4 Multi-Carrier

HSDPA

Scheduling

Secondary

carrier

activation/

deactivation

None N/A

3.2 Load Control

3.2.1 Load Measurement

The Flexible Dual Carrier HSDPA feature affects the cell load estimation in the following

aspects:

l Downlink cell power

–Cell Guaranteed Bit rate Power (GBP), which is used for downlink power admissionalgorithms 1 and 3

– Equivalent number of downlink users, which is used for downlink power admission

algorithm 2

l Number of HSDPA users

For details about load estimation, see Call Admission Control Feature Parameter Description.

The load estimation results serve as a basis for Potential User Control (PUC), LDR, OLC, and

load balancing-based inter-frequency DRD. Of these functions, only the PUC remains

unchanged after the Flexible Dual Carrier HSDPA feature is applied.

Cell Downlink GBP

When the Flexible Dual Carrier HSDPA feature is applied, the cell downlink GBP consists of

R99 user power, SC-HSDPA user power, and DC-HSDPA user power. The transmit power of

each DC-HSDPA user in the primary or secondary cell equals the user's total GBP multiplied

by the percentage of the transmit power in the cell.

NOTE

GBP is the power required for the guaranteed bit rate (GBR) in the downlink.

Figure 3-2 shows the composition of cell downlink GBP after the Flexible Dual Carrier HSDPA

feature is applied.

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Figure 3-2 Composition of cell downlink GBP after the Flexible Dual Carrier HSDPA feature

is applied

NOTE

The methods of estimating the downlink cell power in a DC-HSDPA cell are the same before and after the

Flexible Dual Carrier HSDPA feature is enabled. For details, see Call Admission Control Feature

Parameter Description.

Equivalent Number of Downlink UsersWhen the Flexible Dual Carrier HSDPA feature is activated, DC-HSDPA users consume ENU

resources only in the primary cell. For details about how to calculate the consumed ENU

resources in a cell, see Call Admission Control Feature Parameter Description.

NOTE

ENU is short for equivalent number of users.

Number of HSDPA Users

The Flexible Dual Carrier HSDPA feature does not affect the estimation of the number of

HSDPA users. One DC-HSDPA user is calculated as one HSDPA user only in the primary cell.

3.2.2 DRD

This section describes only the DRD when the Flexible Dual Carrier HSDPA feature is applied.

For details about DRD, see Directed Retry Decision Feature Parameter Description. For details

about the DRD for DC-HSDPA UEs, see DC-HSDPA Feature Parameter Description.

During the radio bearer setup or state transition from CELL_FACH, CELL_PCH, or URA_PCH

to CELL_DCH, the RNC performs DRDs to select primary and secondary cells for UEs if the

RNC determines that DC-HSDPA is configured for the UEs according to the radio bearer policy.

The DRD procedure is as follows:

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1. The RNC ranks candidate cells that meet the DRD quality requirements.

The Flexible Dual Carrier HSDPA feature does not affect candidate cell ranking.

During candidate cell ranking, the RNC successively performs DRD for device type

steering, DRD for HSPA+ technical satisfaction, DRD for service priority, DRD for load

balancing, and DRD for user position. For details, see DC-HSDPA Feature Parameter

Description.

2. The RNC determines primary and secondary cells.

The RNC selects the primary cell in order from high priority to low priority ranked in the

preceding step.

After selecting the primary cell, the RNC selects a secondary cell in order from light

downlink load to heavy downlink load from the candidate secondary cell list to form a cell

group with the primary cell and then performs CAC. The candidate secondary cell list is

reported by the NodeB to the RNC for each primary cell.

If the CAC attempt succeeds, the UE is served by the selected cell group. If the CAC attempt

fails, the RNC selects the next secondary cell in order of load from the candidate secondarycell list.

If the CAC attempt fails in all candidate secondary cells, the RNC selects the next primary

cell in order of priority and performs CAC. The RNC repeats this process until the CAC

procedure is successful.

NOTE

The primary and secondary cells for a DC-HSDPA user must belong to the same multi-carrier cell group.

A primary cell can have multiple candidate secondary cells. Assume that a multi-carrier cell

group has three cells that operate in three adjacent frequencies in the same band: F1, F2, and F3.

If the RNC selects F2 as the primary cell for a DC-HSDPA UE, F1 and F3 are both candidate

secondary cells. Therefore, F2 can form a DC-HSDPA group with either of them.

The SecCellLdbDrdChoice(BSC6900,BSC6910) parameter specifies the downlink load type

during secondary cell selection.

l When this parameter is set to UserNumber, the RNC selects a secondary cell based on the

number of HSDPA users.

l When this parameter is set to Power, the RNC selects a secondary cell based on the

downlink power.

The SecCellLdbDrdChoice(BSC6900,BSC6910) parameter can be set at either the RNC level

or the cell level. The RNC-level parameter is in the SET UDRD command. The cell-level

parameter is in the ADD UCELLDRD or MOD UCELLDRD command. If this parameter isset at the cell level, the cell-level parameter prevails, regardless of whether it is also set at the

RNC level. If this parameter is set only at the RNC level, the RNC-level parameter prevails.

3.2.3 CAC

The Flexible Dual Carrier HSDPA feature affects only downlink cell power resource-based

CAC. For details about CAC, see Call Admission Control Feature Parameter Description. For

details about the CAC for DC-HSDPA UEs, see DC-HSDPA Feature Parameter Description.

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Downlink Cell Power Resource-based CAC

Table 3-3 describes the impact of the Flexible Dual Carrier HSDPA feature on downlink cell

power resource-based CAC.

Table 3-3 Impact of the Flexible Dual Carrier HSDPA feature on downlink cell power resource-

based CAC

WhethertheFlexibleDualCarrierHSDPAFeature IsApplied in

the Cell

Cell Type Downlink Power AdmissionAlgorithms 1 and 3

Downlink PowerAdmissionAlgorithm 2

No DC-HSDPA cell l For non-DC-HSDPA UEs, the

RNC performs CAC in the

serving cell and in the DC-

HSDPA group.

l For DC-HSDPA UEs, the RNC

performs CAC based on the

remaining downlink power of

the DC-HSDPA group.

For DC-HSDPA

UEs, the RNC

performs CAC

based on the

remaining downlink

power of the DC-

HSDPA group.

Yes DC-HSDPA cell For DC-HSDPA UEs, the RNC

performs CAC in the primary and

secondary cells. If the CAC

procedure in any cell is successful,

the admission of DC-HSDPA UEs

is considered successful.

For DC-HSDPA

UEs, the RNC

performs CAC only

in the primary cell.

NOTE

For details about power admission algorithms 1, 2, and 3, see chapter 7 "Cell Power Resource-based CAC"

in Call Admission Control Feature Parameter Description.

CAC based on Other Resources

The Flexible Dual Carrier HSDPA feature does not affect CAC based on the number of HSDPA

users. For DC-HSDPA UEs, the RNC performs CAC based on the number of HSDPA users

only in the primary cell.

The Flexible Dual Carrier HSDPA feature does not affect NodeB credit resource-based CAC

and Iub resource-based CAC.

Admission Failure Processing

Figure 3-3 shows how a DC-HSDPA UE admission failure is processed.

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Figure 3-3 Admission failure processing

The RNC attempts to select a neighboring cell for inter-frequency blind handovers as the primary

cell and then selects an appropriate secondary cell. The RNC then performs CAC.

If the CAC attempt fails in all inter-frequency co-coverage cells in the same sector, DC-HSDPA

services fall back to R99 channels in the current cell and then reattempt to access the network.

3.2.4 Queuing and Preemption

The Flexible Dual Carrier HSDPA feature does not affect the queuing and preemption functions

of DC-HSDPA UEs.

l DC-HSDPA UEs are queued only in the primary cell.

l DC-HSDPA UEs preempt only the resources of other DC-HSDPA UEs in the primary cell.

The queuing and preemption functions of DC-HSDPA UEs are the same as those of SC-HSDPA

UEs. For details about queuing and preemption, see Load Control Feature Parameter

Description.

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3.2.5 LDR and OLC

After the Flexible Dual Carrier HSDPA feature is applied, the RNC monitors the load status of

each cell and triggers LDR or OLC. For details about how to monitor the load status of a cell,

see section 3.2.1 Load Measurement.

For DC-HSDPA UEs, the RNC performs LDR only on the UEs that use the current cell as the

primary cell. The LDR function is the same as that before the Flexible Dual Carrier HSDPA

feature is applied. If LDR is implemented through inter-frequency handovers, the target cell

cannot be a secondary cell of the UE.

The OLC function is the same as that before the Flexible Dual Carrier HSDPA feature is applied.

For details about LDR and OLC, see Load Control Feature Parameter Description and Overload

Control Feature Parameter Description.

3.3 Dynamic Cell ShutdownDuring off-peak hours, one or more cells in co-coverage areas can be shut down to reduce the

power consumption of the NodeB. The following two features describe dynamic shutdown of

cells:

l WRFD-020117 Multi-Carrier Switch off Based on Traffic Load

l WRFD-020122 Multi-Carrier Switch off Based on QoS.

The Flexible Dual Carrier HSDPA feature can be used with the dynamic cell shutdown function.

After the Flexible Dual Carrier HSDPA feature is activated, the following condition is added

for shutting down a cell:

The number of DC-HSDPA UEs in the cell must be less than or equal to the value of the

McHsdpaUserNumThd(BSC6900,BSC6910) parameter in the ADD

UCELLDYNSHUTDOWN command.

For details about how to estimate the downlink power of a cell, see 3.2.1 Load Measurement.

For details about the dynamic cell shutdown function, see Green BTS Feature Parameter

Description.

3.4 Multi-Carrier HSDPA Scheduling

Each UE is assigned a MAC-ehs entity. The MAC-ehs entity assigned to a DC-HSDPA UE

performs joint scheduling between the primary and secondary cells.

After the Flexible Dual Carrier HSDPA feature is introduced, the NodeB supports joint

scheduling for all DC-HSDPA UEs in different cells. The NodeB ranks DC-HSDPA UEs

according to user priority and allocates the resources in the primary and secondary cells to the

UE.

The NodeB takes more resources from cells with a lighter load and fewer resources from cells

with a heavier load in the group to allocate to UEs. In this way, the resources of cells with a

heavier load are reserved for SC-HSDPA UEs.

For details about joint scheduling, see HSDPA Feature Parameter Description.

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3.5 Activation and Deactivation of Supplementary Carrier

The NodeB deactivates the supplementary carrier for a dual-carrier user when the user's traffic

volume is low. When the traffic volume rises, the NodeB reactivates the supplementary carrier

and the user becomes a dual-carrier user again.

When one carrier is enough to carry the data sources and throughput for a user, the DC-HSDPA

supplementary carrier can be deactivated for the user. Only the ACK/NACK and CQI messages

over the primary carrier are transmitted on the HS-DPCCH. In this way, the HS-DPCCH power

and the uplink load are reduced. When the data sources and throughput for a user exceed the

capability of one carrier, the supplementary carrier will be reactivated for the user.

For details, see Traffic-Based Activation and Deactivation of the Supplementary Carrier In

Multi-carrier Feature Parameter Description.

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4 Related Features

4.1 Prerequisite Features

If multiple cells in a multi-carrier cell group operate in the same frequency band, the cells that

operate in the same frequency band must have the WRFD-010696 DC-HSDPA feature enabled.

4.2 Mutually Exclusive Features

If the Flexible Dual Carrier HSDPA feature is used with the WRFD-010684 2×2 MIMO feature

in a cell, the Primary/Secondary common Pilot (PSP) mode must be used for the MIMO. For

details, see MIMO Feature Parameter Description.

4.3 Impacted Features

RAN Sharing and MOCN

The Flexible Dual Carrier HSDPA feature can be enabled in RAN sharing or Multi-Operator

Core Network (MOCN) scenarios.

When the Flexible Dual Carrier HSDPA feature is enabled in RAN sharing or MOCN scenarios,

run the RNC MML command SET UOPERATORSHARINGMODE to set InterPlmnMultiCarrSwitch(BSC6900,BSC6910) to YES. This allows UEs to use cells

belonging to different operators as primary and secondary cells, but each UE must use its

operator's cell as the primary cell. The secondary cell can belong to other operators. When

InterPlmnMultiCarrSwitch(BSC6900,BSC6910) is set to NO, the UE must use its operator's

cells as the primary and secondary cells.

DC-HSUPA

The Flexible Dual Carrier HSDPA feature does not affect the configuration of DC-HSUPA.

When the Flexible Dual Carrier HSDPA feature is used with DC-HSUPA, a DC-HSDPA UE

can use DC-HSUPA only when the DC-HSUPA group is the same as the DC-HSDPA group.

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Figure 4-1 shows an example of using the Flexible Dual Carrier HSDPA feature and DC-

HSUPA together.

Figure 4-1 Example of using the Flexible Dual Carrier HSDPA feature and DC-HSUPA together

Figure 4-1 assumes that a multi-carrier cell group has three cells (F1, F2, and F3) and the Flexible

Dual Carrier HSDPA feature is activated in the cells. If F1 and F2 are configured as a DC-

HSUPA group, only DC-HSDPA UEs that use F1 and F2 as the primary and secondary cells

can establish DC-HSUPA connections in the uplink, and other DC-HSDPA UEs cannot establish

DC-HSUPA connections in the uplink.

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5 Network ImpactSystem Capacity

This feature reduces the difference between the downlink load of cells in a multi-carrier cell

group. The effect of this feature depends on the number of DC-HSDPA UEs and their traffic

volume. A larger number of DC-HSDPA UEs and a larger traffic volume results in smaller

difference between the downlink load of cells.

Network Performance

Cells in a multi-carrier cell group have the same time offset (specified by the TCell

(BSC6900,BSC6910) parameter). When multiple cells (three or four) served by the same RRU

in a sector transmit data at full power, the peak-to-average ratio (PAR) of the RRU increases if

a higher-order modulation scheme is used in the downlink. As a result, cell throughput maydecrease. On live networks, cells in the same sector do not transmit data at full power for a long

period of time, and therefore cell throughput only slightly decreases.

After Flexible Dual Carrier HSDPA is activated in networks with a low load, the data rates of

DC-HSDPA UEs increase because UEs can fully utilize frequency resources. As network load

increases, the gain provided by this feature decreases. The difference between the downlink load

of cells in a multi-carrier cell group before this feature is activated also affects the gain provided

by this feature. A larger difference results in a greater gain.

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6 Engineering Guidelines

6.1 When to Use Flexible Dual Carrier HSDPA

This feature is recommended in the following scenarios:

l There are more than two inter-frequency co-coverage cells.

l A large proportion of UEs support DC-HSDPA.

l The downlink load of inter-frequency co-coverage cells is low.

When the downlink load is high or the proportion of UEs supporting DC-HSDPA is small, the

gain provided by this feature is low. For details about the impact of downlink load or the

proportion of UEs supporting DC-HSDPA on this feature, see section 6.5.1 Factors AffectingFeature Benefits.

6.2 Required Information

Before feature deployment, operators need to collect the following information:

l Frequencies, and bandwidth

l Proportion of UEs supporting DC-HSDPA

l Cell downlink load

For details about the related counters, see section 6.5.2 Feature Benefits Monitoring.

6.3 Planning

6.3.1 RF Planning

Before enabling the Flexible Dual Carrier HSDPA feature, plan the frequencies as described in

2.3.2 Cells Candidate for a Multi-Carrier Cell Group.

Frequencies in the same frequency band can be either adjacent or non-adjacent. Figure 6-1

shows an example of three adjacent and non-adjacent frequencies in the same frequency band

(band a).

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Figure 6-1 Three frequencies in the same frequency band

6.3.2 Network Planning

After you determine the frequency band and frequencies, determine multi-carrier cell groups

and the multi-carrier HSDPA technologies for each cell. For details about the requirements, see

sections 2.3.1 Multi-Carrier HSDPA Technologies and 2.3.2 Cells Candidate for a Multi-

Carrier Cell Group.

On live networks, most operators have multiple inter-frequency co-coverage cells in urban areas

and hotspots. Using multi-carrier HSDPA technologies and the Flexible Dual Carrier HSDPA

feature together enables full utilization of frequency resources and supports a smooth evolution

to future technologies. The following provides configuration suggestions for the typical scenario

below.

In this scenario, three or four inter-frequency co-coverage cells that operate in the same

frequency band have been enabled with DC-HSDPA.

The Flexible Dual Carrier HSDPA feature can be activated in this scenario. This feature helpsflexibly allocate frequency resources and enable smooth multi-carrier evolution. Figure 6-2

shows an example of multi-carrier evolution in a single-band scenario.

Figure 6-2 Example of multi-carrier evolution in a single-band scenario

RAN Sharing and MOCN

In MOCN and RAN sharing scenarios, cells of different carriers can form a multi-carrier cell

group when the InterPlmnMultiCarrSwitch(BSC6900,BSC6910) parameter is set to YES.

For details about the implementation of the Flexible Dual Carrier HSDPA feature in RAN

sharing and MOCN scenarios, see 4.3 Impacted Features.

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6.3.3 Hardware Planning

l Dependency on RNC hardware

None

l Dependency on NodeB hardware

– The BTS3812A, BTS3812E, and BTS3812AE can be configured with a maximum of

three carriers. The BTS3812A, BTS3812E, and BTS3812AE must be configured with

the EBBI, EBOI, EDLP+EULP, or EDLP+EULPd boards. The HBBI and HDLP boards

do not support this feature.

– The DBS3800 can be configured with a maximum of three carriers. The DBS3800 must

be configured with the EBBC or EBBCd board.

– Only the 3900 series base stations support 4C-HSDPA. Only the 3900 series base

stations can enable MIMO for frequencies where Flexible Dual Carrier HSDPA is

activated. The 3900 series base stations must be configured with the WBBPb, WBBPd,

WBBPf, or UBBPd board.

Table 6-1 presents an example of the hardware configuration of a NodeB that is configured with

three sectors.

Table 6-1 Example of the hardware configuration of a NodeB that is configured with three

sectors

Scenario BaseStationType

Hardware Configuration

Three carriers DBS3800 The DBS3800 must be

configured with two

BBU3806s. The two

BBU3806s must be

interconnected, and each

must be configured with an

EBBC or EBBCd board.

BTS3812A,

BTS3812E,

and

BTS3812AE

The BTS3812A, BTS3812E,

and BTS3812AE must be

configured with at least two

EBBI or EBOI boards.Alternatively, the

BTS3812A, BTS3812E, and

BTS3812AE must be

configured with two EDLP

boards and one EULP or

EULPd board.

3900 series

base stations

The 3900 series base stations

must be configured with at

least two WBBPb, WBBPd,

or WBBPf boards (in any

combination).

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Scenario BaseStationType

Hardware Configuration

Three carriers (with DC-HSDPA+MIMO) 3900 series base stations The 3900 series base stationsmust be configured with at

least two WBBPf boards,

three WBBPb boards, three

WBBPd boards, or three

boards that can be any

combination of WBBPb,

WBBPd, and WBBPf boards.

Four carriers 3900 series

base stations



least three WBBPb, WBBPd,

or WBBPf boards (in anycombination).

Four carriers (with DC-HSDPA+MIMO) 3900 series

base stations



least three WBBPd or

WBBPf boards (in any

combination).

6.4 Deployment

6.4.1 Process

Figure 6-3 outlines Flexible Dual Carrier HSDPA deployment process.

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Figure 6-3 Flexible Dual Carrier HSDPA deployment process

6.4.2 Requirements

NOTE

In site split scenarios, the Flexible Dual Carrier HSDPA feature can be enabled only when site split is performed on a per sector basis.

Other Features

l If multiple cells in a multi-carrier cell group operate in the same frequency band, the cells

that operate in the same frequency band must have the WRFD-010696 DC-HSDPA feature

enabled.

l The DC-HSDPA feature must have already been enabled according to the planning result.

License

For details about how to activate the license, see License Management Feature Parameter

Description.

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Feature ID FeatureName

LicenseControlItem

LicenseControlName

NE LicenseAllocationforMultiple

Operators

SalesUnit

WRFD-150

208

Flexible

Dual

Carrier

HSDPA

LQW9FDC

DB01

Flexible

Dual

Carrier

HSDPA

Function

(per

NodeB)

NodeB Method 1 per

NodeB

If RAN Sharing or MOCN is enabled, the licensed value is allocated among the primary and

secondary operators according to the value of the "License Allocation for Multiple Operators

parameter".

Method 1: some license control items, such as Dynamic CE Function (per NodeB), can be

allocated only through the common group. For the NodeB license allocation among multiple

operators, see License Management Feature Parameter Description.

Operating Environment

l One sector is deployed with three or four inter-frequency cells and these cells must be

configured in the same downlink resource group. After the configuration of the multi-carrier

cell group, the NodeB attempts to set up all cells in the multi-carrier cell group on the same

board. If not all the cells are set up in the same group, the NodeB reports ALM-28206 Local

Cell Capability Decline.

l NOTE

It is recommended that the Auto Rebuild Cell function be enabled. Run the SET

NODEBRESALLOCRULE command to set the SW parameterto ON and specifying CS User

Number Threshold and PS User Number Threshold. If the number of CS users and PS users in

the downlink resource group is smaller than or equal to the thresholds, cells are reestablished

automatically.

l UEs are capable of at least one of the multi-carrier HSDPA technologies: DC-HSDPA.

lWhen cells in a multi-carrier cell group that operate in the same frequency band use non-adjacent frequencies, UEs must support non-adjacent frequencies.

6.4.3 Data Preparation

Table 6-2 lists the data to prepare before activating the Flexible Dual Carrier HSDPA feature.

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Table 6-2 Data to prepare before activating the Flexible Dual Carrier HSDPA feature

Parameter Name Parameter ID Setting Notes Data Source

Time Offset Tcell

(BSC6900, BSC6910)

All cells in a multi-carrier cell

group that are to be enabled withthe Flexible Dual Carrier HSDPA

feature must have this parameter

set to the same value.

Radio network

plan (internal)

Multiple Carrier

Cell Group ID

MULTICELL

GRPID

The multi-carrier cell group ID

must be unique under a NodeB.

Radio network

plan (internal)

Cell Hspa Plus

function switch

HspaPlusSwitc

h

(BSC6900,

BSC6910)

DC_HSDPA(Cell DC-HSDPA

Function Switch) in this

parameter must be selected.

Radio network

plan (internal)

Multiple Carrier

Cell Group Type

MULTICELL

GRPTYPE

This parameter must be set to

HSDPA(HSDPA).

Radio network

plan (internal)

Inter-PLMN

Multicarrier

HSDPA Switch

InterPlmnMult

iCarrSwitch

(BSC6900,

BSC6910)

In RAN sharing or MOCN

scenarios, when cells belonging to

different operators are used for

HSDPA transmission of a UE, this

parameter must be set to YES

(YES).

Radio network

plan (internal)

6.4.4 Precautions

Before you configure a multi-carrier cell group, for example, if you want to add a cell to or

remove a cell from the group, you need to deactivate all cells in the group first. Deactivating a

cell interrupts the ongoing services in the cell. Therefore, configure a multi-carrier cell group

during off-peak hours, for example, in the early morning.

6.4.5 Activation

Using MML Commands

Based on the network plan and prepared data, perform the following operations to activate the

Flexible Dual Carrier HSDPA feature:

Step 1 Configure a multi-carrier cell group on the NodeB side.

A multi-carrier cell group can be either added or reconstructed from a DC-HSDPA group.

l Adding a new multi-carrier cell group

Perform the following operations to add a multi-carrier cell group:

Run the NodeB MML command ADD NODEBMULTICELLGRP to add a multi-carrier

cell group.

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Run the NodeB MML command ADD NODEBMULTICELLGRPITEM multiple times

to add local cells to the multi-carrier cell group.

l Reconstructing a multi-carrier cell group

If the cells to be enabled with the Flexible Dual Carrier HSDPA feature have been configured

as DC-HSDPA groups, operators can reconstruct a multi-carrier cell group from any DC-

HSDPA group and delete the other groups. The detailed operations are as follows:

To reconstruct a DC-HSDPA group, run the NodeB MML command RMV

NODEBMULTICELLGRPITEM or ADD NODEBMULTICELLGRPITEM to remove

or add the local cells in the group.

For the other DC-HSDPA groups, run the NodeB MML commands RMV

NODEBMULTICELLGRPITEM and RMV NODEBMULTICELLGRP to remove

them.

NOTE

The multi-carrier cell group ID can be queried using the NodeB MML command LST

NODEBMULTICELLGRP.

Step 2 (Optional) Run the RNC MML command MOD UCELLSETUP to modify the value of theTime Offset parameter based on the prepared data.

NOTE

The value of the Time Offset parameter can be queried using the LST UCELL command.

Step 3 (Optional) Run the STR REALLOCLOCELL command to reestablish a cell, and then run theSET NODEBRESALLOCRULE command to set the SW parameter to ON and set the

threshold CS User Number Threshold and PS User Number Threshold. If the number of CS

users and PS users in the downlink resource group is smaller than or equal to the thresholds,

cells are reestablished automatically.

Step 4 (Optional) If the multi-carrier HSDPA capability of a cell in the multi-carrier cell group changes,run the following commands to reconfigure parameters based on the network plan and prepared

data.

MMLCommand

Parameter Name Switch Remarks

MOD

UCELLALG

OSWITCH

Cell Hspa Plus

function switch

DC_HSDPA(DC-HSDPA

Function Switch)

Cell DC-HSDPA switch

DCMIMO_HSDPA(DC-

HSDPA+MIMO FunctionSwitch)

Cell DC-HSDPA

+MIMO switch

SET

UCORRMAL

GOSWITCH

Channel

Configuration

Strategy Switch

CFG_HSDPA_DC_SWIT

CH

DC-HSDPA bearing

switch

CFG_HSDPA_DC_MIM

O_SWITCH

DC-HSDPA bearing

switch

SET UFRC HSPA

Technologies

Retried by UEs

DC_HSDPA DCC-HSDPA DRD

switch

DCMIMO_HSDPA DC-HSDPA+MIMO

DRD switch

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MMLCommand

Parameter Name Switch Remarks

SET

UOPERATORSHARING

MODE

Inter-PLMN

Multicarrier HSDPA Switch

N/A Switch that uses cells

belonging to differentoperators for HSDPA

transmission of a UE in

RAN sharing or MOCN

scenarios

----End

MML Command Examples//Adding a multi-carrier cell group

ADD NODEBMULTICELLGRP: MULTICELLGRPID=1, MULTICELLGRPTYPE=HSDPA;//Adding local cells to a specified multi-carrier cell group

ADD NODEBMULTICELLGRPITEM: MULTICELLGRPID=1, ULOCELLID=1;




//Modifying the time offset parameter for cells in the same multi-carrier cell

group

MOD UCELLSETUP: CellId=1, TCell=CHIP256;

//Enabling the joint scheduling of multi-carrier cells on different baseband

processing boards

SET NODEBALGPARA: HSPAMCINTERBRDSCHSW=ON;

//(Optional)Enable the Auto Rebuild Cell function

SET NODEBRESALLOCRULE: SW=ON, CSUSERNUM=0, PSUSERNUM=0;

//Turning on the HSPA+ switch

MOD UCELLALGOSWITCH: CellId=1, HspaPlusSwitch=DC_HSDPA-1&DB_HSDPA-1;//Turning on the multi-carrier HSDPA bearing switch

SET UCORRMALGOSWITCH: CfgSwitch=CFG_HSDPA_DC_SWITCH-1&CFG_HSDPA_DB_SWITCH-1;

//Enabling DC-HSDPA UEs to use cells belonging to different operators in RAN

sharing or MOCN scenarios

SET UOPERATORSHARINGMODE: InterPlmnMultiCarrSwitch=YES;

Using the CME (Method 1)

This feature can be batch activated using the CME. For detailed operations, see the following

section in the CME product documentation or online help: Managing the CME > CME

Guidelines > Enhanced Feature Management > Feature Operation and Maintenance.

Using the CME (Method 2)

NOTE

When configuring the Flexible Dual Carrier HSDPA feature on the CME, perform a single configuration first,

and then perform a batch modification if required.

Configure the parameters of a single object before a batch modification. Perform a batch modification before

logging out of the parameter setting interface.

Step 1 Configure a single object (such as a cell) on the CME.

Set parameters on the CME according to the operation sequence described in Table 6-3. For

instructions on how to perform the CME single configuration, see CME Single Configuration

Operation Guide.

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Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center)

To modify objects in batches, click on the CME to start the batch modification wizard. For

instructions on how to perform a batch modification through the CME batch modification center,

press F1 on the wizard interface to obtain online help.

Table 6-3 Configuring parameters on the CME

SN MO NE Parameter Name Parameter ID Configurable inCMEBatchModificationCenter

1 NodeBMultiCellG

rp

NodeB Multiple CarrierCell Group ID

MULTICELLG RPID

Yes

Multiple Carrier

Cell Group Type

Set this parameter to

HSDPA(HSDPA).

MULTICELLG

RPTYPE

Yes

NODEB

MULTIC

ELLGRP

ITEM

NodeB Local Cell ID ULOCELLID Yes

2

(Optional)

UCELLS

ETUP

RNC Time Offset

NOTE

This parameter must

be set according to the

prepared data.

Tcell

(BSC6900,

BSC6910)

Yes

3 NODEB

RESALL

OCRUL

E

NodeB Auto Rebuild Cell

Switch

SW Yes

----End

6.4.6 Activation Observation

Monitor counters or perform drive tests to check whether the Flexible Dual Carrier HSDPA

feature is working properly.

Monitoring Counters

Monitor the value of the following counter in cells of a multi-carrier cell group:

VS.HSDPA.DC.PRIM.UE.Mean.Cell: Average number of DC-HSDPA UEs in anchor carrier

in a Cell

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If the value of this counter is not zero for a cell, this feature is working properly for that cell.

Performing Drive Tests

1. Prepare multiple test UEs.

NOTE

Multiple test UEs are used to simultaneously perform FTP dialing tests so that every cell in the multi-

carrier cell group is tested.

2. Start Uu interface trace on the RNC LMT for each test UE. In the displayed Uu Interface

Trace dialog box, select RRC_RB_SETUP, as shown in Figure 6-4.

Figure 6-4 Uu Interface Trace dialog box

3. Use test UEs to perform FTP dialing tests in the coverage area of the multi-carrier cell

group, and ensure that HSDPA connections are established.

4. View the value of the "dl-SecondaryCellInfoFDD" IE in the traced Uu interface messages

for the secondary cell information.

Expected result: It is observed that all test UEs have established a DC-HSDPA radio bearer

and every cell in the multi-carrier cell group serves as a primary or secondary cell for a test

UE. The observed results indicate that this feature is working properly.

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Figure 6-5 "dl-SecondaryCellInfoFDD" IE

6.4.7 Deactivation

Using MML Commands

Use either of the following methods to deactivate the Flexible Dual Carrier HSDPA feature:

lDisabling the Flexible Dual Carrier HSDPA feature in some cells of the multi-carrier cellgroup

l Removing the multi-carrier cell group

Table 6-4 describes the two methods.

Table 6-4 Flexible Dual Carrier HSDPA feature deactivation methods

Method Advantage/Disadvantage Operation

Disabling the

Flexible Dual

Carrier HSDPA

feature in

some cells of

the multi-

carrier cell

group

Advantage:

l This method does not

require cell deactivation,and therefore services are

uninterrupted.

Disadvantage:

l N/A

Run the RNC MML command MOD

UCELLALGOSWITCH multiple times to

disable the Flexible Dual Carrier HSDPAfeature in some cells of the multi-carrier cell

group. In this step, deselect DC_HSDPA

(Cell DC-HSDPA Function Switch) in the

Cell Hspa Plus function switch parameter.

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Method Advantage/Disadvantage Operation

Removing the

multi-carrier

cell group

Advantage:

l This method completely

disables the Flexible DualCarrier HSDPA feature.

Disadvantage:

l Deactivating a cell

interrupts services in the

cell. Therefore, perform

this operation during off-

peak hours, for example,

in the early morning.

l After the multi-carrier cell

group is removed, each

cell supports only R99 and

SC-HSDPA connections

in the downlink and the

single-user downlink peak

throughput decreases.

1. Run the RNC MML command DEA

UCELL multiple times to deactivate

each cell in the multi-carrier cell group.2. Run the NodeB MML command RMV

NODEBMULTICELLGRPITEM to

remove all cells from the multi-carrier

cell group.

3. Run the NodeB MML command RMV

NODEBMULTICELLGRP to remove

the multi-carrier cell group.

4. Run the RNC MML command ACT

UCELL to reactivate the cells.

MML Command Examples

l Disabling DC-HSDPA or DB-HSDPA in some cells of the multi-carrier cell group

//Disabling the multi-carrier HSPA+ feature in a logical cellMOD UCELLALGOSWITCH: HspaPlusSwitch=DC_HSDPA-0;

l Removing the multi-carrier cell group

//Deactivating local cells

DEA UCELL: CellId=1;




//Removing cells from the multi-carrier cell group

RMV NODEBMULTICELLGRPITEM: MULTICELLGRPID=1, ULOCELLID=1;




//Removing the multi-carrier cell groupRMV NODEBMULTICELLGRP: MULTICELLGRPID=1;

Using the CME

Operators can use either method described in Table 6-4 to deactivate the Flexible Dual Carrier

HSDPA feature.

NOTE

When configuring the Flexible Dual Carrier HSDPA feature on the CME, perform a single configuration

first, and then perform a batch modification if required.

Configure the parameters of a single object before a batch modification. Perform a batch modification before logging out of the parameter setting interface.

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Step 1 Configure a single object (such as a cell) on the CME.

Set parameters on the CME according to the operation sequence in Table 6-5 or Table 6-6. For

instructions on how to perform the CME single configuration, see CME Single Configuration

Operation Guide.

l For parameters involved in the method of disabling the Flexible Dual Carrier HSDPA feature

in some cells of the multi-carrier cell group, see Table 6-5.

l For parameters involved in the method of removing the multi-carrier cell group, see Table

6-6.

Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center)

----End

To modify objects in batches, click on the CME to start the batch modification wizard. For

instructions on how to perform a batch modification through the CME batch modification center, press F1 on the wizard interface to obtain online help.

Table 6-5 Configuring parameters on the CME (disabling the Flexible Dual Carrier HSDPA

feature in some cells of the multi-carrier cell group)

SN MO NE Parameter Name ParameterID

Configurablein CME BatchModificationCenter

1 UCELLALGO

SWITCH

RNC Cell Hspa Plus

function switch

HspaPlusS

witch(BSC6900,

BSC6910)

Yes

Table 6-6 Configuring parameters on the CME (removing the multi-carrier cell group)

SN MO NE Parameter Name Parameter ID Configurable inCMEBatch

ModificationCenter

1 LOCE

LLID

LISTT

YPE

Nod

eB

Local Cell ID ULOCELLID Yes

2 NodeB

Multi

CellGr

p

Nod

eB

Multiple Carrier Cell

Group ID

MULTICELLGRPID Yes

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6.5 Performance Monitoring

6.5.1 Factors Affecting Feature Benefits

l Proportion of UEs supporting DC-HSDPA in a cell

The smaller the proportion of UEs supporting DC-HSDPA the less the feature benefits.

l Traffic volume of DC-HSDPA UEs in a cell

The feature benefits are greater in heavy-traffic scenarios, such as browsing web pages, or

downloading MP3s, UE software, and ring tones.

The feature benefits are less in the following scenarios:

–The traffic volume of DC-HSDPA UEs is very low. For example, UEs are receivingonly heartbeat packets (most heartbeat packets are less than 100 bytes in size).

– DC-HSDPA UEs are performing full buffer services, such as bit torrent (BT)

downloading, point-to-point service (P2P), and high definition movie downloading. In

such scenarios, the feature benefits mainly result from diversity scheduling. When the

number of DC-HSDPA users increases, the feature benefits decrease.

l Cell load

When downlink load is heavy or the number of online UEs is large in a cell, the feature

benefits are limited.

In addition, when the difference between the downlink load of cells in a multi-carrier cell group

is large, fairness among users cannot be ensured, and cell resources cannot be flexibly allocated.The Flexible Dual Carrier HSDPA feature flexibly schedules resources of different cells for

HSDPA transmission of a UE, ensuring the fairness among users and improving resource

utilization.

6.5.2 Feature Benefits Monitoring

Use either of the following methods to monitor the feature benefits:

l Checking UE throughput

l Checking the difference between the downlink load of cells in a multi-carrier cell group

The related counters are as follows:

l VS.HSDPA.MeanChThroughput

This counter measures the UE throughput.

l VS.MeanTCP

This counter measures the cell load. If the value of this counter is large for cells in a multi-

carrier cell group, the feature benefits decrease.

l VS.MeanTCP.NonHS

This counter measures the downlink power resources consumed by non-HSDPA users. The

larger the value of this counter, the less the feature benefits.

l VS.MeanTCP.HSDPA.MC

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This counter measures the downlink power resources consumed by DC-HSDPA, DB-

HSDPA, and 4C-HSDPA users. The larger the value of this counter, the smaller the

difference between the downlink load of cells in a multi-carrier cell group is.

l Counters indicating the proportions of DC-HSDPA UEs in a cell

–VS.HSDPA.DC.PRIM.UE.Mean.Cell: Average number of DC-HSDPA UEs using this

cell as the primary cell

– VS.HSDPA.DC.SEC.UE.Mean.Cell: Average number of DC-HSDPA UEs using this

cell as the secondary cell

– VS.HSDPA.UE.Mean.Cell: Average number of HSDPA UEs in a cell

6.6 Parameter Optimization

N/A

6.7 Troubleshooting

This feature affects the following alarms on the NodeB side:

l ALM-28206 Local Cell Capability Decline

A new trigger condition is added for this alarm. When a cell in a multi-carrier cell group

does not support the Flexible Dual Carrier HSDPA feature due to hardware limitations and

the multi-carrier cell group consists of more than two cells, this alarm is reported for all

cells in the multi-carrier cell group.

To clear this alarm, you are advised to add new hardware resources by referring to section

6.3.3 Hardware Planning or deactivate the Flexible Dual Carrier HSDPA feature byreferring to section 6.4.7 Deactivation.

l ALM-26811 Configured Capacity Limit Exceeding Licensed Limit

A new trigger condition is added for this alarm. When a multi-carrier cell group consists

of more than two cells and the license for the Flexible Dual Carrier HSDPA or DC-HSDPA

feature is not activated, this alarm is reported.

To clear this alarm, you are advised to apply for the license for the Flexible Dual Carrier

HSDPA or DC-HSDPA feature by referring to section 6.4.2 Requirements or deactivate

the Flexible Dual Carrier HSDPA feature by referring to section 6.4.7 Deactivation.

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7 ParametersTable 7-1 Parameter description

Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

TCell BSC690

0

ADD

UCELL

SETUP

MOD

UCELL

SETUP

WRFD-

010699

WRFD-

151209

WRFD-

022000

WRFD-

150207

WRFD-

150209

WRFD-

150208

WRFD-

150250

WRFD-

150223WRFD-

010696

WRFD-

150227

WRFD-

021309

WRFD-

021308

DC-

HSDPA

+MIMO

Macro-

Micro

DC-

HSDPAPhysical

Channel

Manage

ment

4C-

HSDPA

DB-

HSDPA

Flexible

Dual

Carrier

HSDPA

3C-

HSDPA

MC-

HSDPA

+MIMO

DC-

HSDPA

Meaning: Difference between the System Frame

Number (SFN) and NodeB Frame Number (BFN) of the

NodeB which the cell belongs to. It is recommended that

TCell of all intra-frequency neighboring cells under one

NodeB should be unique. TCell of DC carrier group

cells or MC carrier group cells must be the same. For

detailed information of this parameter, see 3GPP TS

25.402.

GUI Value Range: CHIP0, CHIP256, CHIP512,

CHIP768, CHIP1024, CHIP1280, CHIP1536,

CHIP1792, CHIP2048, CHIP2304

Unit: chip

Actual Value Range: CHIP0, CHIP256, CHIP512,



Default Value: None

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Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

DB-HSDPA

+MIMO

Improve

d

Downlin

k

Coverag

e

Extende

d Cell

Coverage up to

200km

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Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

TCell BSC6910 ADDUCELL

SETUP

MOD

UCELL

SETUP

WRFD-010699

WRFD-

151209

WRFD-

022000

WRFD-

150207

WRFD-

150209

WRFD-150208

WRFD-

150250

WRFD-

150223

WRFD-

010696

WRFD-

150227

WRFD-021309

WRFD-

021308

DC-HSDPA

+MIMO

Macro-

Micro

DC-

HSDPA

Physical

Channel

Manage

ment

4C-HSDPA

DB-

HSDPA

Flexible

Dual

Carrier

HSDPA

3C-

HSDPA

MC-HSDPA

+MIMO

DC-

HSDPA

DB-

HSDPA

+MIMO

Improve

d

Downlin

k

Coverag

e

Extende

d Cell

Coverag

e up to

200km

Meaning: Difference between the System Frame Number (SFN) and NodeB Frame Number (BFN) of the

NodeB which the cell belongs to. It is recommended that

TCell of all intra-frequency neighboring cells under one

NodeB should be unique. TCell of DC carrier group

cells or MC carrier group cells must be the same. For

detailed information of this parameter, see 3GPP TS

25.402.

GUI Value Range: CHIP0, CHIP256, CHIP512,



Unit: chipActual Value Range: CHIP0, CHIP256, CHIP512,



Default Value: None

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Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

MULTICELLG

RPID

BTS3900,

BTS390

0

WCDM

A

ADD NODEB

MULTI

CELLG

RP

ADD

NODEB

MULTI

CELLG

RPITE

M

LST NODEB

MULTI

CELLG

RP

LST

NODEB

MULTI

CELLG

RPITE

M

RMV NODEB

MULTI

CELLG

RP

RMV

NODEB

MULTI

CELLG

RPITE

M

None None Meaning: Uniquely identifies a multiple carrier cellgroup.

GUI Value Range: 0~95

Unit: None

Actual Value Range: 0~95

Default Value: None

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Parameter ID

NE MMLCommand

FeatureID

FeatureName

Description

MULTICELLG

RPTYP

E

BTS3900,

BTS390

0

WCDM

A

ADD NODEB

MULTI

CELLG

RP

LST

NODEB

MULTI

CELLG

RP

WRFD-010696

WRFD-

140204

WRFD-

150209

WRFD-

150207

WRFD-

150250

WRFD-150208

WRFD-

150223

WRFD-

150227

WRFD-

010699

DC-HSDPA

DC-

HSUPA

DB-

HSDPA

4C-

HSDPA

3C-

HSDPA

FlexibleDual

Carrier

HSDPA

MC-

HSDPA

+MIMO

DB-

HSDPA

+MIMO

DC-

HSDPA

+MIMO

Meaning: Specifies the type of a multiple carrier cellgroup.

GUI Value Range: HSDPA(HSDPA), HSUPA

(HSUPA)

Unit: None

Actual Value Range: HSDPA, HSUPA

Default Value: HSDPA(HSDPA)

SecCell

LdbDrd

Choice

BSC690

0

ADD

UCELL

DRD

MOD

UCELL

DRD

WRFD-

150207

WRFD-

150209

WRFD-

150208

WRFD-

150250

WRFD-

150223

WRFD-

010696

WRFD-

150227

4C-

HSDPA

DB-

HSDPA

Flexible

Dual

Carrier

HSDPA

3C-

HSDPA

MC-

HSDPA

+MIMO

DC-

HSDPA

DB-

HSDPA

+

Date post:	07-Aug-2018
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