HSPA+ Introduction -

HSDPA

www.huawei.com

HUAWEI TECHNOLOGIES Co., Ltd.

 Contents
1 HSDPA Introduction

2 HSDPA Features

3 HSDPA Performance

4 References

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2

 HSPA+, the natural evolution of HSPA

 Both HSPA and HSPA+ are defined in 3GPP

 HSPA+ is backward compatible with HSPA

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 Huawei HSPA+ Solution Roadmap

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 HSPA+ Feature Dependency

DC-HSUPA DC-MIMO
Release 9

DC-HSDPA MIMO

16QAM
64QAM
Release 7/8
UL L2 DL L2
enhancements enhancements

Release 5/6 E-DCH

-
HS-DSCH

= pre Rel-7 feature

a
Indicates that feature a has a dependency on
Legends = Rel-7/8 feature feature b.
b
= optional Rel-9 feature
-

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 13

 Benefits summary of HSDPA

HSDPA Features Key Benefits

DL 64-QAM  50% higher downlink peak data rate
 Increases downlink capacity

DL 2x2 MIMO  Doubles peak data rates

 Increases downlink capacity

L2 Enhancement  Smaller overhead consumption

 Better cell edge coverage

Downlink
 the theoretical downlink peak rate can reach 42 Mbit/s
MIMO with 64QAM

DC-HSDPA  DC-HSDPA with 64QAM can provide a peak rate of 42 Mbit/s in

the downlink.

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 HSDPA Channel Mapping

Logical channels

Transport channels

Physical channels

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 HSDPA Physical Channel Mapping
Transport Channels Physical Channels

DCH Dedicated Physical Data Channel (DPDCH)

Dedicated Physical Control Channel (DPCCH)
RACH Physical Random Access Channel (PRACH)
CPCH Physical Common Packet Channel (PCPCH)
Common Pilot Channel (CPICH)
BCH Primary Common Control Physical Channel -CCPCH)
(P
FACH Secondary Common Control Physical Channel (S-CCPCH)
PCH
Synchronisation Channel (SCH)
DSCH Physical Downlink Shared Channel (PDSCH)
Acquisition Indicator Channel (AICH)
Access Preamble Acquisition Indicator Channel (AP-AICH)
Paging Indicator Channel (PICH)
CPCH Status Indicator Channel (CSICH)
Collision-Detection /Channel-Assignment Indicator
Channel (CD/CA-ICH)
HS-DSCH High Speed Physical Downlink Shared Channel (HS-PDSCH)

HS-DSCH-related Shared Control Channel (HS-SCCH)

Dedicated Physical Control Channel (uplink) for HS-DSCH (HS-DPCCH)

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8

 Basic Concepts -Data Frame Structure of HSDPA User Plane
Protocol

Introduction of SDU / PDU structure

(s)RBs for UE1 (s)RBs for UE2 PDU structure

RLC SDU

RLC RLC RLC RLC RLC RLC RLC Payload

Header

MAC-d MAC-d RLC Payload

Header

MAC-c U-RNTI RLC Payload

Header

Iub-FP Iub-FP Iub-FP

MAC-ehs MAC-ehs U-RNTI RLC Payload

Header Header

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9

 HSDPA Protocol Structure

• Admission control
• Handover decision
• Load management
• QoS management

MAC Control PCCH BCCH CCCH CTCH SHCCH MAC Control MAC Control
DCCH DTCH DTCH
TDD only

Configuration MAC-d
without MAC-c/sh
Configuration
with MAC-c/sh

MAC-hs Configuration MAC-c/sh

with MAC-c/sh

Iub
HS-DSCH HS-DSCH PCH FACH FACH RACH CPCH USCH USCH DSCH DSCH DCH DCH
FDD only TDD only TDD only Iur or local
Associated Downlink Associated Uplink
Signalling Signalling

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 HSDPA Protocol Stack 1
DTCH DCCH DTCH DCCH

MAC-d MAC-d

MAC-hs MAC- HS- HS-DSCH FP

hs DSCH FP

PHY PHY AAL2 or AAL2 or UDP/IP

UDP/IP

ATM or ATM or IP
IP
UE Uu Node B Iub CRNC/SRNC

 The NodeB is added with the MAC-hs entity

 On the RNC, the MAC-d maps the data on the DTCH/DCCH to HS-DSCH.
 The MAC-hs
- Controls the stream between the MAC-hs and the MAC-d (for shared Iub transmission),
- Performs data scheduling (to coordinate the Uu resources, user experience, and system capacity),
- Selects transmission formats (rate adaptation)

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 11

 HSDPA Channel Mapping

Logical Channels

Data mapping

Transport Channels

Physical Channels

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HSPA+ Principles
HSPA+ Evolution:

84.4Mbps
• 2011, R9, RAN 13.0
DC-MIMO (64QAM) • SE: 84.4/10

42.2Mbps 42.2Mbps
• 2010, R8, RAN 12.0 • 2010, R8, RAN 12.0
MIMO+64QAM • SE: 42.2/5 DC+64QAM • SE: 42.2/10

28.0Mbps 21.1Mbps
• 2009, R7, RAN 11.0 • 2009, R7, RAN 11.0
MIMO • SE: 28.0/5 64QAM • SE: 21.1/5

14.0Mbps (MAC layer peak rate)

• 2008, R6 (3GPP), RAN 10.0
HSDPA (16 QAM) • Spectral Efficiency (SE): 14.0/5

DC-HSDPA is an essential branch in evolution from HSDPA to DC-MIMO

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

 HSDPA Terminals Capability & Service Allocation

Max HS-DSCH
UE Category Max peak rate Modulation
codes for HSDPA

Category 13 15 17
QPSK, 16QAM, 64QAM
Category 14 15 21

Category 15 15 23
QPSK, 16QAM+MIMO
Category 16 15 28

Category 17 15 17/23 QPSK, 16QAM, 64QAM/

Category 18 15 21/28 MIMO: QPSK, 16QAM

Category 19 15 35 (QPSK.16QAM.64QAM)+MIM

Category 20 15 42 O

Category 21 15 28
QPSK,16QAM+DC
Category 22 15 28

Category 23 15 42
QPSK,16QAM, 64QAM +DC
Category 24 15 42

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 14

 Contents
1 HSDPA Introduction

2 HSDPA Features

3 HSDPA Performance

4 References

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15

 HSDPA Features
 HSDPA is a WCDMA downlink high-speed data solution.

 Main features :
▪ 2 ms short frame
▪ Link adaptation technologies on the physical layer, such as
▪ Hybrid Automatic Repeat Request (HARQ)
▪ Adaptive modulation and coding (AMC)
▪ High-order modulation scheme for high spectrum efficiency
▪ Code division and time division for flexible scheduling among Ue (s)
▪ Downlink Enhanced L2
▪ HSDPA Feature 64 QAM
▪ MIMO
▪ DC HSDPA

 Benefits:
▪ Increase the downlink peak data rate and improve the service delay
▪ Increase the downlink throughput
▪ increase downlink capacity : better efficiency for downlink code and power
resources

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 16

 HSDPA Feature - HARQ
• HARQ process involve only the NodeB and the UE (Without involving RNC)
=> allows the NodeB to rapidly request retransmission of erroneously received data

• After receiving a MAC-hs PDU sent by the NodeB, the UE performs a CRC check and reports
an ACK or NACK on the HS-DPCCH to the NodeB:
• l If the UE reports an ACK, the NodeB transmits the next new data.
• l If the UE reports an NACK, the NodeB retransmits the original data

HARQ allows the terminal

HARQ enables the system
to merge the data on the
to decide whether a
retransmitted physical layer.
retransmission is required

RTT : Round Trip Time

The NodeB initiates a

new Transport Block „s UE performs soft
transmission every TTI. combining of all the data
received and increase the
cell capacity

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 17

 HSDPA Feature - HARQ

• For HARQ retransmission between the NodeB and the UE, two combining
strategies are available (CC and IR)

(CC) all retransmitted data is the same as previously transmitted data

▪ Chase Combining (CC) for retransmitting data

(IR) the retransmitted data may be different from the previously transmitted
data

▪ Partial incremental redundancy (PIR) for transmitting system bits in priority

▪ Full incremental redundancy (FIR) for transmitting verification bits in priority

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 HSDPA Feature – Fast AMC
Like the DCH which performs power control, HSDPA performs fast Adaptive Modulation and
Coding (AMC) to compensate channel variations

 Modulation scheme and coding rate adjustment each TTI:

› AMC is based on the channel quality indicator (CQI) reported by the UE to select an appropriate
transmission rate to meet channel conditions.
› Good channel conditions : 16QAM or 64QAM can be used to provide higher transmission rates.
› Poor channel conditions: QPSK can be used to ensure the transmission quality.

 In each TTI, the TFRC entity of a cell selects one or multiple queues and :
› Determine the amount of data that can be transmitted
› Determine the modulation scheme
› Determine the appropriate power and channelization codes

TFRC Transport Format and Resource Combination

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 19
 Feature : Time and HS-PDSCH Codes Multiplex
 The parallel data transmission of multiple users over HS-DSCH feature enables the allocation of:
 the time division multiplexing : different codes in the same TTI to different user
 the same code in different TTIs for different users

Benefit :
o Increase the resource utilization and system throughput.

Requirements :
o More HS-PDSCH codes are required within a single TTI.
o More efficient when the Node B has more HS-PDSCH codes available than codes supported by the UE.
Eg: the UE supports 5 codes and the Node B has 10 codes available in a single TTI.

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 HSDPA Feature - DL enhanced L2

Why Enhanced L2 ? RAN11 Function of Enhanced L2

 Static RLC PDU size

 Limited Data throughput
Eg : with 640 bit RLC PDU,  RLC entity: Flexible PDU, < 1500 bytes
2048 RLC window size, and 100ms RTT:
 MAC entity: Support MAC-ehs
MBR = 640*2048/0.1=13.1Mbps.
 Support data rate of 21Mbps and beyond
 Can’t support data rate of 21mbps and beyond
Limitation for introduction of MIMO, 64QAM,
DC HSDPA..

Fixed RLC PDU

size 320bit 640bit

Flexible RLC PDU ( < 1500 bytes )

size

L2 is not a bottleneck any more

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 Min 10 byte = 80 bits

HSDPA Feature - DL enhanced L2

- The original downlink L2 function cannot adapt to such
high rates for high-speed transmission

- R7 introduction:
To prevent L2 to become the bottleneck:

-Enhancing the RLC entity to support flexible RLC PDU

sizes at the RLC layer

Adding a new sub layer, the MAC-ehs for

- data segmentation at the MAC layer
- and for multiplexing of queues of different priorities

requirement of edge requirement of high-

coverage for smaller speed transmission for
RLC PDU sizes larger RLC PDU sizes

After the RLC PDU arrives at the MAC layer, the MAC-ehs in the NodeB determines whether to
segment this PDU will be segmented into a smaller PDUs based on instantaneous radio conditions

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

 HSDPA Feature - 64 QAM

Bits/symbols increase

DL Modulation Scheme Data Rate

16 QAM 14.4 Mbps
64QAM 21 Mbps

• 64QAM can increase downlink data throughput at

about 1.4 times of 16QAM.

• However, 64QAM modulation can only be selected

by UEs in very good radio conditions and only near
cell area.

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

 HSDPA Feature 64 QAM

Item Requirement

CN The CN needs to support 3GPP Release 7.

64QAM depends on downlink enhanced L2, which requires the RNC to support flexible RLC PDU sizes.
RNC The RNC also needs to control the use of 64QAM during RB setup, reconfiguration, and handover.
The DPUb or DPUe board supports the rate of 21 Mbit/s.

The NodeB needs to select a modulation scheme (64QAM or non-64QAM) for every TTI through TFRC
selection.
a) To enable a DBS3800 to support 64QAM, you need to configure at least one enhanced downlink
baseband processing board, namely EBBC or EBBCd board.‎
NodeB b) The DBS3900 and BTS3900/3900A need to be configured with a WBBPb, WBBPd, or WBBPf
baseband board for supporting the 64QAM feature.
c) The BTS3812E/AE needs to be configured with an EBBI, EBOI, EDLP, or EDLPd board. If an EDLP or
EDLPd board is used, the EULP or EULPd board needs to support 64QAM.
d) The BTS3902E supports the 64QAM feature.

UE The UE needs to support HS-DSCH category 13, 14, 17, 18, 19, or 20.

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 24

 HSDPA Feature 64 QAM
 Technical Characteristics
› In the case of 64QAM, a gain is achieved only when the signal-to-noise ratio (SNR) is high.
Therefore, a good channel environment(CQI) is required

› A higher gain can be achieved when DL 64QAM is used with other technologies such as DC-HSDPA.

› the TFRC selection (function of the NodeB) determines whether to use downlink 64QAM and notifies the
UE of the result through the HS-SCCH in each TTI.

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 MIMO Feature
2 RF modules are interconnected with antenna system using RF jumper:

Restrictions:
• MIMO affects the settings of receive diversity.
Thus, MIMO affects the UEs that do not support
this feature. That is, the data rates of these UEs
are decreased.

• Only a few handsets support MIMO.

High CAPEX : Two Tx channel are used (Two transmitting paths) but no additional antenna is necessary.

It may require additional RRUs and WBBPa doesn’t support

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 MIMO
MIMO (Multi Input Multi Output)

Gain for peak data rate per user:

• Users at the center of a cell
• Users at the edge of a cell

• MIMO adopts the multi transmission and multi reception mode:

• Two transmit antenna in the base station and
• two in the receiver side used

• The Common Pilot Channel (CPICH) has to be transmitted from both antennas.

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 Downlink 64QAM+MIMO Introduction

MIMO 64QAM + MIMO

64QAM

Downlink Peak Data Rate

Downlink Peak Data Rate Mbps

45 42 64 QAM
40 • Only users at the center of a cell can
35 enjoy the increase of peak data rate
30 28 • License need to be added and
configured by cell
25 21
20 14.4 MIMO
15 • All users in a cell can enjoy the
10 increase in the peak data rate
5 • License for MIMO need to be added
and configured by cell
0
RAN10.0 RAN11.0 RAN11.0 RAN12.0

Scheduling Method: The scheduler in Node B determines whether to use 64QAM+MIMO or not according to
Channel Quality and service requirement and UE capability

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 DC-HSDPA Feature
Downlink peak rate
up to 42Mbps
Primary Carrier
Frequency 1
Dual cells covers RAN 12
the same
geographical area

Second Carrier
Frequency 2

Use 2 adjacent carriers to transmit

simultaneously data to the same user

Carrier Configuration:
 For DC users, the UL channel is only carried on the primary carrier (anchor)
 Both carriers can be used in DL for retaining and initiating services.
Service Distribution:
 The CS or PS conversational service is carried on a single carrier.
 The BE/streaming service is carried on the DC-HSDPA preferentially.

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 29

 DC-HSDPA Feature

• DC-HSDPA has best coverage and better throughput in cell edges compared to all other features of HSPA+
due to double frequency resource utilization.

DL Configuration Peak Data Rate

DC-HSDPA + 16QAM (without MIMO) 28 Mbps
DC-HSDPA + 64QAM (without MIMO) 42 Mbps
DC-HSDPA + 64QAM (with MIMO) 84Mbps

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

 DC-HSDPA Feature

 Benefits
› Dual-cell HSDPA (DC-HSDPA) enables users to receive HSDPA data from two inter-
frequency DL cells under the same coverage at the same time

› Compared with the traditional HSPA technology, DC-HSDPA brings the following
gains:

– Reduce the HTTP service delay. As the user peak rate is increased, the
HTTP service response delay can be greatly reduced, and user service
experience can be improved.
– Improving the user experience of cell edge users enhancing the DL
coverage.
– Fully utilizing spectrum resources of telecom operators to improve the
capacity.

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Page 31
 DC-HSDPA Feature
Item Requirement

CN The CN needs to support the downlink peak rate of 42 Mbit/s provided by downlink
DC- HSDPA with 64QAM.

RNC The RNC needs to support downlink enhanced L2.

The RNC provides the radio bearer scheme for DC-HSDPA.

NodeB DC-HSDPA requires NodeB to support MAC-ehs. A single MAC-ehs entity supports
HS-DSCH transmission in more than one cell served by the same Node-B (FDD only).

In 3GPP Release 8, HS-DSCH categories 21, 22, 23, and 24 of the UE are added to
support DC-HSDPA. In later 3GPP release, more HS-DSCH categories may support DC-
UE HSDPA.

 Restrictions of DC Cells
› DC-HSDPA is used only on channel transport HS-DSCHs.
› The anchor and supplementary carrier cells must belong to the same NodeB and work
on adjacent frequency

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 DC-HSDPA Feature
 Configuration Activation
› NodeB Side

» To configure the a local DC group, run ADD DUALCELLGRP.

» To query a local DC group, run LST DUALCELLGRP.

› RNC Side

» To enable the DC-HSDPA switch, run SET CORRMALGOSWITCH:

CfgSwitch=CFG_HSDPA_DC_SWITCH-1;

» When both DC+64QAM and MIMO+64QAM are supported, to set the preference to DC-HSDPA,
run SET FRC: MIMOorDcHSDPASwitch=DC-HSDPA-1;

» To activate the 42M license to make the DL peak rate exceed 28 Mbit/s, run ACT LICENSE:
ISPRIMARYPLMN=YES, FUNCTIONSWITCH4=HSPA_DOWN42_PER_USER-1;

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Page 33
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 34
 DC HSDPA + 64QAM
Data Throughput according to Interference :

D C -H SD P A , M IM O Lin k P e ro fm ra n c e ,P A 3

40000
D C -H SD P A + 16Q A M
35000 D C -H SD P A + 64Q A M
M IM O + 16Q A M
M IM O + 64Q A M DL Configuration Peak Data Rate
30000 H SD P A 2x2 MIMO + 16QAM (Single Cell) 28 Mbps
2x2 MIMO + 64QAM (Single Cell) 42 Mbps
25000 2x2 MIMO + 16QAM (Dual Cell) 56 Mbps
To u t(k b p s)

2x2 MIMO + 64QAM (Dual Cell) 84 Mbps

20000

15000

10000

5000

0
-10 -5 0 5 10 15 20 25 30
Io r/Io c (d B )

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 35

 Contents
1 HSDPA Introduction

2 HSDPA Features

3 HSDPA Performance

4 References

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 36

 Flowchart of analyzing HSDPA cell performance problems
There is an Identify HSDPA
optimization scheme. cell performance
problems
The item cannot be
evaluated at present.
Does the
N average single-user throughput reach
END
the required BER on the air
interface?

Is the BER
Y on the air interface
high?

Optimize the Is the CQI Is the power

Y Y
coverage poor? usage high?

Perform Are there N

Y
expansion many UEs?

Perform Iub Is the Iub

Y transmission usage
expansion
high?
N
Is the
Optimize the Is the RLC
Y transmission quality of Y
transmission retransmission ratio
the Iub path poor?
high

Check power Is the residual

Y BER on the air interface
control parameters N
high?

N
UE problems

Perform Is the code usage

Y
expansion high?

Global or upper- Is upper-layer Does the theoretical cell rate

Y data insufficient? Y
layer problems meet the requirement?

N N
Other problems
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 37
END
 Analysis on HSDPA cell performance problems
Step Evaluation Item Evaluation Result and Handling Suggestion
High Low
(1) Bit error rate (BER) on the Optimize the coverage. Go to step (2).
air interface in the cell
(2) Power usage of the cell Perform the following operations based on the CQI: Go to step (3).
If the CQI is poor, optimize the coverage.
If the CQI is normal, add carriers.
(3) Usage of the Iub transmission Expand the Iub transmission bandwidth. Go to step (4).
bandwidth
(4) RLC retransmission rate Perform the following operations based on the IP path Go to step (5).
transmission quality on the Iub interface:
If the transmission quality is poor, optimize
transmission.
If the transmission quality is normal, check the residual
bit errors on the air interface. For the cells with many bit
errors on the air interface, check power control
parameters.
(5) Code resource usage Add code resources. Check whether the theoretical rate
of the cell meets the requirement. If
the theoretical rate meets the
requirement, the upper-layer data
sources are insufficient.

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 38

 Troubleshooting for PS Data problems
In order to locate the issues, the following procedures are applied:

HSDPA
Checking the Signaling
Checking RF Quality
Checking and clearing Alarms
Checking HSDPA Status of the Cell
Checking Access Signaling Messages
Checking the License
Checking CPU Usage of Lap Tops
Checking DCCC setting
Checking Downlink Power Resources
Checking Downlink Code Resources
Checking the number of Online Users in a Cell
Checking Channel Quality in Air interface
Checking the Bandwidth on the IuB interface
Checking Packet Losses on Iub Interface
Checking RLC Downlink Window Full

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

 Troubleshooting for PS Data problems

The input information for the previous procedures are:

-Traces - Alarm Logs - PCHR Data - Operation Logs
- Performance Data - DT Log files - Real time monitoring - Etc….

Tools used for previous input :

-UMAT
- NPMaster
- M2000
- RNC LMT
- Probes

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

 Contents
1 HSDPA Introduction

2 HSDPA Features

3 HSDPA Performance

4 Reference

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 41

 Reference
Support Guide for service delivery:
•《RAN Feature Parameter Description》
•《 Feature Deployment Guide》
•《 Acceptance Guide》

Index Document Name Description Support Link

RAN Feature Documentation presents http://support.huawei.com/support/pages/navigation/gotoKBNav
i.do?actionFlag=getAllJsonData&colID=ROOTENWEB|CO0000000173&
RAN Feature customers with product information level=3&itemId=186-00061297&itemId0=29-7&itemId1=3-
1 337&itemId2=1-553&itemId3=186-
Parameter Description related to WCDMA RAN features, 00061297&itemId4=&itemId5=&itemId6=&itemId7=&itemId8=&itemId
9=&materialType=ProductManual&isHedexDocType=&pageSize=20
include HSPA and HSPA+.

http://support.huawei.com/support/pages/navigation/gotoKBNav
Feature Deployment Guide presents i.do?actionFlag=getAllJsonData&colID=ROOTENWEB|CO0000000173&
Feature Deployment level=3&itemId=202-00046306&itemId0=29-7&itemId1=3-
2 feature deployment procedure and 337&itemId2=1-553&itemId3=202-
Guide 00046306&itemId4=&itemId5=&itemId6=&itemId7=&itemId8=&itemId
notice. 9=&materialType=123-2&isHedexDocType=&pageSize=20

http://support.huawei.com/support/pages/navigation/gotoKBNav
Acceptance Guide presents feature i.do?actionFlag=getAllJsonData&colID=ROOTENWEB|CO0000000173&
3 Acceptance Guide level=2&itemId=1-553&itemId0=29-7&itemId1=3-337&itemId2=1-
acceptance procedure and test case. 553&itemId3=&itemId4=&itemId5=&itemId6=&itemId7=&itemId8=&it
emId9=&materialType=123-2&isHedexDocType=&pageSize=20

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 42

DC-HSDPA

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 43

Thank you
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