WCDMA HSPA RAN12 DC-HSDPA Feature ISSUE 1.00.ppt

8/13/2019 WCDMA HSPA RAN12 DC-HSDPA Feature ISSUE 1.00.ppt

1/41

www.huawei.com

Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved.

Huawei RAN12.0DC-HSDPA

Feature Presentation


2/41


Objectives

Upon completion of this course, you will be able to

understand:

Working principle of DC-HSDPA

Radio Resource Management of DC-HSDPA

Implementation of DC-HSDPA in Huawei RAN12

Page2


3/41


Contents

1. Basic Principle of DC-HSDPA

2. Radio Resource Management of DC-HSDPA

3. Implementation of DC-HSDPA

4. The Performance of DC-HSDPA

Page3


4/41


DC-HSDPA

DC-HSDPA is introduced in 3GPP Release 8

DC-HSDPA allows a UE to set up HSDPA connections with two

inter-frequency time-synchronous cells that have the same

coverage

Page4


5/41


DC-HSDPA

Advantages:

DC-HSDPA improves the end usersthroughput in the whole

cell area even in the cell edges

No negative impacts on the legacy HSDPA users and terminals.

If transceiver elements (RRU) support multi carrier technology

then no additional hardware will be required for network

upgrade to DC-HSDPA

The evolution from the HSPA to DC-HSPA is easy and

economical compared to MIMO upgrade

Page5


6/41


DC-HSDPA Basic Concepts

Primary cell( also called anchor cell )

a carrier that carries all the channels of a UE, including UL

dedicated channels

Secondary cell ( also called supplementary cell )

a carrier that carries only three types of DL channel of a UE

HS-SCCH, HS-PDSCH & P-CPICH

Page6


7/41


Cell Structure and Working Principle

One of the two cells is treated as Anchor (primary) Cell and

the other one as Supplementary (secondary) cell and both

of them can be deployed with Equivalent and Non-

equivalent channel configuration.

RAN12 not supported RAN12 supported

Page7


8/41


Cell Structure and Working Principle

Equivalent Mode Non Equivalent Mode

Advantage

1. Both the cells can work as

anchor and supplementary

cells for DC users.

2. Both the cells will work as

an independent single cell

source for the non-DC-HSDPA subscribers or

legacy HSDPA subscribers

The supplementary cell's power will be

saved and contribute to the cell

throughput.

Disadvant

age

The supplementary cell willcost more DL power since

some of the common

channels are not be switch off.

1. The anchor cell cannot be changed.

2. If the supplementary cell is configured

with one HS-DSCH and a P-CPICH

(3GPP did not give the actualrequirements about the common

channels' configuration of

supplementary cell), the

supplementary cell cannot serve

traditional HSDPA, HSUPA and R99

users.

Page8


9/41


Cell Structure and Restriction

The Timing of the two cells remains the same ( defined by parameterTcel l )

The ACK/NACK/CQI for 2 Carriers will be Joint-encoded and reported by HS-

DPCCH in Anchor Cell

DC-HSDPA+MIMO is not implemented within 3GPP R8 standards, but the sectorcan support DC and MIMO simultaneously

The two cells must belong to the same Node-B and are on adjacent carriers in the

same frequency band

The UE will only communicate with one cell (Anchor Carrier) in the uplink

Page9


10/41


New UE categories for DC-HSDPA

HS-DSCH

category

Maximum

number of

HS-

DSCH

codes

received

Minimu

m inter-

TTI

interval

Maximum number of

bits of an HS-DSCH

transport block

received within an

HS-DSCH TTI

Total

number of

soft channel

bits

Supported

modulations

with dual cell

operation

Category 21 15 1 23370 345600 QPSK,16QA

M

Category 22 15 1 27952 345600 QPSK,16QA

M

Category 23 15 1 35280 518400 QPSK,16QA

M,64QAM

Category 24 15 1 42192 518400 QPSK,16QA

M,64QAM

Page10


11/41


Contents





Page11


12/41


DC-HSDPA Mapping

DC-HSDPA is unavailable for CS, IMS Signaling, SRB and PS conversational

Parameter (PS_STREAMING_ON_HSDPA_SWITCH) are available to disable

Streaming mapping onto HS-DSCH

For BE & Streaming, bit rate thresholds (DL streaming threshold on HSDPA , DL

BE traffic threshold on HSDPA) are provided

RABs with the maximum bit rate higher than or equal to the threshold will be

mapped onto HSDPA.

RNC Parameter (MIMO_64QAMorDC-HSDPA) will be used to decide the priority of

DC and MIMO

IMS Signaling

BE

Streaming

Mapping

RB on SC-HSDPAPS Conversational

RB on DC-HSDPASRB

CS

Page12


13/41


DC-HSDPA Mapping

Parameter Default Value

PS_STREAMING_ON_HSDPA_SWITC

H ON

DL streaming threshold on HSDPA 64Kbps

DL BE traffic threshold on HSDPA 64Kbps

MIMO_64QAMorDC-HSDPA Depending on Operator

Page13


14/41


Step2:Get the Technical Priority of the DRD Cells by

MIMO_64QAMorDC-HSDPAand MIMOor64QAM

Page14

Step1:Generates a list of candidate DRD-supportive

inter-frequency cells with RAB DRD Conditions

DC-HSDPA Anchor Carrier Selection by DRD


15/41


Step3:The HSDPA Steering Cell will be selected

Page15


(cont.)


16/41


Step4:The DC Groupwill be decided by comparing the DL

Loadbetween the DC GroupsAnd the Anchor Carrier will be selected based on the UL Load

of the 2 carriers belonging to the DC Group

Page16


(cont.)


17/41


Call Admission Control of DC-HSDPA DL Load CAC

Code, CE, Iub CAC: Same as New SC-HSDPA user

User license: 1 DC UE will cost 1 user licenses in only primary cell

Page17

( P1+P2 )

( P2+P3 )


18/41


Mobility of DC-HSDPA

UL RL

DL Anchor Carrier

DL Supplementary

Carrier

UE Move

Page18

Scenario 1:UE move in the DC continuous coverage areas


19/41



UL RL

DL Anchor Carrier

DL Supplementary

Carrier

UE Move

Page19

Scenario 2:UE move from DC areas to the Non-DC areas


20/41



UL RL

DL Anchor Carrier

DL Supplementary

Carrier

UE Move

Page20

Scenario 3:UE move from Non-DC areas to the DC areas


21/41


Scheduling of DC-HSDPA

Scheduling targets:

Target 1: Enhance the QoS, Reduce the Delay-Sensitive

Serviceswaiting time and Guarantee the BEs throughput

Target2: Make full use of the resources of DC-Group

Target3: Realize the User-Differentiation among DC and SC

users, as well as between DC and SC users

Page21


22/41


Scheduling of DC-HSDPA

Scheduling principles of Cells:

Principle 1: The power utilization of Carriers

Principle 2: SC-HSDPA user number of Carriers

Page22


23/41


Scheduling Priority

Scheduling Priority in F1:

SC HSDPA User:

DC-HSDPA User:

Scheduling Priority in F2:

SC HSDPA User:

DC-HSDPA User:

))(

),((Pr

1

1max

tr

tfRFUNCiority

))()(),((Pr

21

1ma x

trtrtfRFUNCiority

)

)(

),((Pr

2

2max

tr

tfRFUNCiority

))()(

),((Pr

21

2max

trtr

tfRFUNCiority

Page23


24/41


DC-Scheduling Example 1

UE A

Cell A: F1

Cell B: F2

UE B

UE C UE D UE E

2ms TTI

Scheduling sequence based on User

priorities on each TTI. For DC UE, the

r1(t) and r2(t) shall be take into account

together (refer the SchedulingPriority) .

DC Priority:

And the 2 sequences (belong to 2 Cells)

are independent.

))()(

),((Pr

21

1max

trtr

tfRFUNCiority

Cell A: F1

Cell B: F2

In this TTI, onlyCell A transfer

the data to UE A

In this TTI, both Cell A&B transfer

the data to UE A. If the buffered datais smaller than the Uu capability, the

following principles will be used to

select the Carrier to transfer the data.

(refer the Scheduling of DC-HSDPA)

In this TTI, onlyCell B transfer

the data to UE A

UE C UE C UE E UE A UE E UE E UE D UE A

UE A UE B UE B UE A UE B UE B UE B UE B

Page24


25/41


Primary

(Cell 1)

Secondary

(Cell 2)

Conditions and Assumptions

Total UE number 2

SC-HSDPA UE

number

1 in Cell 1

DC-HSDPA UE

number1

DC-HSDPA UE

categoryCat 24

SC-HSDPA UE

category

Cat 14

User locat ionThe two users in

the same location.

SC User

DC

User

Expected Scheduling Results

SC-HSDPA UESC-HSDPA is served by Cell

1

DC-HSDPA UEDC-HSDPA is mainly served

by Cell 2 only

Throughp ut rat io

(SC vs. DC User)Approximately 1:1

Scheduling Example 2

Page25


26/41


Primary

(Cell 1)

Secondary

(Cell 2)

SC1 User

DC

User


SC-HSDPA UESC-HSDPA is served by Cell 1

SC-HSDPA is served by Cell 2

DC-HSDPA UE

DC-HSDPA is served by both

Cell 1 and Cell 2

Throughp ut rat io

(SC1 vs. SC 2 vs . DC

User)

Approximately 1:1:1


Total UE number 3

SC-HSDPA UEnumber

1 in Cell 11 in Cell 2

DC-HSDPA UE

number1

DC-HSDPA UE

categoryCat 24

SC-HSDPA UE

category Cat 14

User locat ionThe three users in

the same location

SC2 User


Page26


27/41


Primary

(Cell 1)

Secondary

(Cell 2)

SC2 User

DC

User


SC-HSDPA UEBoth the two SC-HSDPA users

are served by Cell 1

DC-HSDPA UEDC-HSDPA is served by both

Cell 1 and Cell 2

Throughp ut rat io

(SC1 vs. SC 2 vs . DC

User)

Approximately 1:1:2


Total UE number 3

SC-HSDPA UE

number 2 in Cell 1

DC-HSDPA UE

number1

DC-HSDPA UE

categoryCat 24

SC-HSDPA UE

category Cat 14

User locat ionThe three users in

the same location

SC1 User


Page27


28/41


Contents





Page28


29/41


Enable DC-HSDPA

License is available

Software: RAN12.0 and later

version

Switch: DC_HSDPA should be ON

Hardware requirementNetwork Element Boards/Module/VersionBTS3812E/BTS3812AE HBBI and HDLP EBBI or EDLP

DBS3800 BBU3806 without EBBC or EBBCd BBU3806 with EBBC or EBBCd

3900 series NodeB WBBPa WBBPb or WBBPd

Dependency on other RAN features

Page29


30/41


Key ParametersParameter Description

DCHSDPASwitch DC-HSDPA will be supported with this parameter switch on

ULLdbDRDSwitchDcHSDPA UL Load Balance procedure can be triggered with this

parameter switch on

ULLdbDRDLoadRemainThdDcH

SDPA

During the DC-HSDPA UE try to access the network by cell

A, if the remained UL load of cell A is smaller than this

parameter, network will trigger UL Load Balance procedure

to select suitable cell as the Anchor Carrier

ULLdbDRDOffsetDcHSDPA During the UL Load Balance Procedure, if the UL Load

difference between the current cell and a DRD cell is larger

than this parameter, the cell can be the target cell

MIMO64QAMorDCHSDPASwitc

h

Select between MIMO and DC-HSDPA for UE if UE support

both MIMO and DC-HSDPA

Page30


31/41


DC-HSDPA RNC Counters

Page31


32/41


DC-HSDPA NodeB Counters

Page32


33/41


Contents





Page33


34/41


DC-HSDPA increases user peak rate

Page34


35/41


Gain of DC-HSDPA for Burst services

Page35


36/41


Gain of DC-HSDPA for large size

services

Page36


37/41


Summary of DC Gain

In Muti-User Burst Services (HTTP, WAP and etc.)

scenarios, the DC-HSDPA can maximize the utilization of

Uu resources and make significant improvement for QoS

Especially, the double instantaneous bit rate (comparingwith SC-HSDPA) , not related with the UE location

(comparing with MIMO) , can be achieved on Non-

Congestion Status

Page37


38/41


DC-HSDPA vs MIMO

DL Cell Throughput ComparisonPA3, Macro cell, 10user/sector, wrapround cell, ISD500m, DL 64QAM

6

8

SC-HSDPA DC-HSDPA SC-HSDPA MIMO

ThroughputinMAC

layer(Mbps)

7.4%10.9%

CDF of UE Throughput in MAC LayerMacro,PA3, 10user/sector, wrapround cells, ISD 500m

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0 1000 2000 3000 4000 5000

UE Throughput(Kbps)

cumulativedistribution

SC+64QAMDC+64QAMMIMO+64QAM

Rate

Difference of

10% best

users

6%

Notes: Ful lBuf fer serv ice ; u sers are dropped uni formly.

Page38

System Simulation for full buffer service with 64QAM


39/41


DC-HSDPA vs MIMO

64QAM+DC-HSPA 64QAM+MIMO

Peak data rate 42Mbps 42Mbps

Data rate/user

In the whole cell, the

throughput/user can be

increased by up to 100%

Gain from 44% to 85% (field test)

vs Non-MIMO, depending on the

radio condition

Improvement on

system capacity

Gain from joint scheduling.

Make full use of the DC-HSDPAcells.

Gain from multi-antenna and

higher spectrum efficiency.

System requirementMulti carrier RF part

2*5MHz adjacent carrier2 Tx RF part or 2* RF part

Deployment impact

Possible Negative performance

impact to traditional HSDPA user,

independent carrier is preferred

Terminal availability 2010Q3 or later 2011Q1 or later

Page39


40/41


Specifications of HSPA

Technology Maximum rate per user Maximum users per cellHSDPA HSDPA 1.8Mbps per User 6 HSDPA Users per CellHSDPA 3.6Mbps per User 32 HSDPA Users per Cell

HSDPA 7.2Mbps per User 64 HSDPA Users per Cell

HSDPA 13.976Mbps per User

HSPA+ downlink HSPA+ Downlink 21Mbps per User 96 HSDPA Users per Cell

HSPA+ Downlink 28Mbps per User 128 HSDPA Users per CellHSPA+ Downlink 42Mbps per User

HSUPA HSUPA 1.44Mbps per User 20 HSUPA Users per Cell

HSUPA 5.74Mbps per User 60 HSUPA Users per Cell

HSPA+ uplink - 96 HSUPA Users per Cell

128 HSUPA Users per Cell

Page40


41/41

Thank youwww.huawei.com

WCDMA HSPA RAN12 DC-HSDPA Feature ISSUE 1.00.ppt

Documents

Transcript of WCDMA HSPA RAN12 DC-HSDPA Feature ISSUE 1.00.ppt