hsdpa principle.ppt

7/23/2019 HSDPA Principle.ppt

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© 2007 ZTE Corporation

HSDPA Principle

PPT Series for Technology Principle

PPT Series for Technology Principle

Name :×××

E-mail :×××

WCDMA Product Planning Dept.

ZTE Marketing S!tem



2

HSDPA H igh S peed Downlink P acket Access

H S D P A

HSUP A

… …

3G

4G

HSDPA is a new technology introduced in R5

Goal: To provide a packetoriented wireless

!road!and access service with high per"or#ance

price ratio$ high downlink !andwidth and short delay

"or %&D'A

(GPP R5 standards are "ro)en in *une$ 2++,

HSDPA is a new technology introduced in R5

Goal: To provide a packetoriented wireless

!road!and access service with high per"or#ance

price ratio$ high downlink !andwidth and short delay

"or %&D'A

(GPP R5 standards are "ro)en in *une$ 2++,

S#all #odi"ication to R--.R/ structure

HSDPA insists on the concept o" s#oothevolution0 HSDPA is the enhance#ent o" R--

structure with the newly added 'A&hs layer to

achieve HAR1$ scheduling and A'&0 t also adds

three dedicated channels on the physical layer0

S#all #odi"ication to R--.R/ structure

HSDPA insists on the concept o" s#oothevolution0 HSDPA is the enhance#ent o" R--

structure with the newly added 'A&hs layer to

achieve HAR1$ scheduling and A'&0 t also adds

three dedicated channels on the physical layer0

#prove the syste# capacity !y applying new

technologies

Share channel trans#ission3ast Scheduling

Shorter TT 3ast retrans#ission and so"t

co#!ination

4ink Adaptive Per#itting High order #odulation

#prove the syste# capacity !y applying new

technologies

Share channel trans#ission3ast Scheduling

Shorter TT 3ast retrans#ission and so"t

co#!ination

4ink Adaptive Per#itting High order #odulation

HSDPA High Perforance Price !atioHSDPA High Perforance Price !atio

Downlink peak rate of single cell: "4#4$%p&

Multi-user share of single cell, with 230

users in theory

Low cost ： Small moification to !""

Goo' technical

e(ol)tion of *CD$A ！



(

HSPDS&H Physical &hannel Structure

HSPDS&H can use 1PS or 6,1A' #odulation0 ' is the !it represented !y each

#odulation sy#!ol0 3or e7a#ple$ '82 stands "or 1PS and '8/ stands "or 6,1A'0

All layer6 signaling are trans#itted !y a""iliated HSS&&H0 HSPDS&H doesn9t carry any

layer 6 signaling0

Slot #0 Slot#1 Slot #2

T slot = 2560 chips, M*10*2 bits (k=4)

Data N data 1 bits

1 HS !DS"H sb$%a&' T = 2 &s

HS+PDSCH ,rae ,orat

Ph-&ical Channel Slot ,orat

Slot "or#at 6&hannel

;itRate

&hannel

Sy#!ol RateS3

;it.HSDS&H Su!

"ra#e;its.Slot < data

+=1PS> /?+k!ps 2/+k!ps 6, -,+ (2+ (2+

6=6,1A'> -,+k!ps 2/+k!ps 6, 6-2+ ,/+ ,/+



Agenda

HSDPA Theor-

HSDPA Ph-&ical .a-er

HSDPA /e- Technologie&

HSDPA !!$

HSDPA E(ol)tion



5

HSDPA ntroduced ey Technologies

A$C ,a&t Sche')ling

"1A$,ie' S," 2& &hort frae

Share' channelHA!1

" 2

3 4

① #opt 2ms short frame, fi$e S%, &DM

an 'DM (etween the users at the

same time

② )ntrouce *+#M high orer

moulation, proiing higher

moulation efficiency

③ #M' makes the ata transport well

aaptie to the changes of raio

channels

④ %ast scheuling makes multi-user

share the raio resource.

⑤ /#! uickly a1ust the channel rate

accoring to the status of raio link

an achiee the error correction anretransmission of the ata.

⑥ Share channel makes the num(er of

access users not limite (y the coe

resources.



,

ey Technology 6

2#s radio "ra#e

Share channel resources are dyna#ically assigned in every

2#s TT HAR1 "ast "eed!ack retrans#ission !ased on 2#s TT

2#s TT #akes scheduling response #uch "aster and in ti#e

"0 &

20 &

40 &

50 &

Earlier relea&e&

2 &

!el 6HS+PDSCH HS+SCCH HS+DPCCH

8&)%+frae&9 620 chip&:&lot 3Slot&

Standard Frame length Channel feedback delay Remark

R-- 6+#s @6++#sScheduling feedback is in

RNC

HSDPA ms !ms （ "#! Slots ）Continuous feedback

supported$ R! still support

the %&ms frame of R''

Decrea&e the loop tie effecti(el- ipro(e the lin; a'apti(e a%ilit- highl-



ey Technology 2

6,1A'

HSDPA 'odulation

1PS

6,1A'


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ey Technology 5

HAR1

A C /

A C /

rong acket #rong acket #

acket #acket #

acket #acket #

rong acket #*rong acket #*

acket #*acket #*

acket #2acket #2

acket #*acket #*

acket #acket #

Drop )'s'%*'d

,)ll

!etran&i&&ion

Only retransmit

redundant info

Soft

Combination

< A C /

< A C /

acket 4acket 4acket 4acket 4

<o'e = UE <o'e = UE

acket #2acket #2

Tra'itional A!1 retran&i&&ion

echani& in!<C

.o> efficenc- long 'ela-

HA!1 retran&i&&ion echani& in <o'e =

High efficenc- &hort 'ela-


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ey Technology ,

Shared &hannel

5ser* 5ser2 5ser3

DCH"

DCH2

DCH3

Share'

HS+DSCH

U$TS

!??

HSDPA

Sae for 6ther 5sers

8Share' fat+pipe9

*0ms

&&) 7 2ms Tie$)ltipleing

Co'e $)ltipleing

De'icate'

TT@ Tran&i&&ion Tie @nter(al


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&o#parison o" HSDPA and R--.R/

te# R-- HSDPA

&apacity （ '!ps ） 20,?? 6/0/

3reBuency spectru#

e""iciency =k!it.='H)C&ell>>5(0, 2-502

Handover Hard handover . So"t handover .

So"ter handover . ntersyste# handover =to GS'>Hard handover in HSPDS&H

Power &ontrol pen loop . &lose loop . e7ternal loop

3ast speed. 4ow speed

4ow speed power control or no power

control in HSPDS&H

'odulation 1PS 1PS ； 6,1A'

4ink Adaptive 3ast power control. so"t handover A'& 、 HAR1 、 short "ra#e and "ast

channel "eed!ack

;it Scra#!le and Descra#!le <.A nly used in HSPDS&H

'A&hs <.A Esed "or "ast scheduling

/SD#

/SD# is to a1ust ata rate

accoring to channel conition when

ensuring the power

（ Con&tant po>er ， Changing

'ata rate ）

!""8!9

!""8!9 is to a1ust power accoring

to channel conition when ensuring

serice rate

（ Con&tant 'ata rate changing

po>er ）



R<& Radio Resource 'anage#ent Su##ary

'oe resource management

/SD#

channeliation

coe

/SD#

scram(ling coe

ower resource management

/SD# total power

resource management

Serice amount measurement8

Deicate measurement

Dynamic raio carrier control

'hannel

#ssignment

'hannel

/anoer

#ccess control

D'/channeliation coe

'hannel

/anoer

Mo(ile management

'ongestion control

Loa control

/anoer

measurement

ower control

hysical channel power control

Loa (alance

Deicate

measurement

!9

'ommon

Measurement

/SD#

'ommon

Measurement

#ssignment of /SD#

resource for each cell

5ser resource assignment

an management



Power &ontrol

/SD# hysical control inclues: /S-DS'/, /S-S''/ an /S-D''/ ：

/S-DS'/

ower control

/S-S''/ower control

/S-D''/

ower control

Support open loop power control, configuration

Measurement ower 6ffset

Support open loop an internal loop power control/S-S''/ ower 6ffset can (e ynamically a1uste

Support open loop an internal loop power control, configuration

∆ #'; ,∆<#'; an ∆') ， an can (e ynamically a1uste accoring

to link status

HS-PDSCH and HS-SCCH dynamically adjust HS-PDSCH and HS-SCCH total power accordin

to t!e resource occupancy o" system e#cludin HS-PDSCH and HS-SCCH$

%or HS-DPCCH& its transmission power is determined 'y DPCCH$ () determine t!e

transmission power o" HS-DPCCH accordin to ain "actor βHS$


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Access &ontrol

4ecause /S-DS'/ physical channel is share resource, access control of /SD# is ifferent than the access control

of eicate channel.

During the access control, the characteristics of streaming, interactie, (ackgroun serices an the working feature of

/S-DS'/ must (e fully consiere. &he high spee feature of /S-DS'/ share channel must (e fully eelope

uring the access control.

/ S

D #

# c c e s

s c on t r ol

5= support /SD#

<um(er of /SD# user

ower resource

Data throughput carrie (y /SD#

D'/ channeliationcoe resource

# c c e s s

D e c i s i on

<oe 4 support /SD#


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Dyna#ic Radio &arrier

' h ann el

#

s s i gnm en t

'S real time serice

S non-real time serice

S real time serice

'hoose D'/

refer %#'/ an /S-DS'/

'hoose %#'/ an D'/

'hoose D'/ an /S-DS'/

Cell &)pport HSDPA

Cell 'oe& not &)pport HSDPA



HSDPA &hannel Handover

/SD# hanoer inclues serice cell change an channel

hanoer of /S-DS'/

Sae freB)enc- &er(ice cell change %et>een <o'e =

%irst release the /S-DS'/ resource of the ol cell of source <oe 4, then

esta(lish the same /S-DS'/ resource as ol cell in the new cell of &arget

<oe 4.

'orrespon to perform har hanoer for /S-DS'/. &he /S-DS'/ transport

channel an raio carrier parameter o not change uring the hanoer

proceure.

5= e$ecute reassignment of physical channels. hen the reassignment of

physical channel is ali, M#'-hs entity of 5= nees to (e reset an 5=

oesn>t receie /SD# serice channel.

&he ali time of physical channel reassignment of 5= correspons to the ali

time of raio link reassignment of <oe 4. #t the ali time, the M#'-hs entity

of Source <oe 4 releases an the M#'-hs entity of &arget <oe 4 esta(lish.

&he two <oe 4s are not transmitting at this time. So the serice is interrupte

instantaneously uring the reassignment time.

Sae freB)enc- &er(ice cell

change in&i'e <o'e =

Similar with the change of same

freuency serice cell insie

<oe 4

&he ifference is that only one

<oe 4 are controlling. &hus

M#'-hs entity of <oe 4 oes

not change an M#'-hs entity of

5= oes not nee to (e reset.

4ut the serice is interrupte at

the ali time of physical channel

reassignment.


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&hannel Handover Trans"er 3igure

*. &raffic &rigger

2. &ransmission ower &rigger

3. 'ongestion &rigger

DCH

,ACH

HS+DSCH

PCH

*. &raffic &rigger

2. Moement &rigger

*. &raffic &rigger

2. Moement &rigger

* .& r af f i c & r i g g er

* .& r af f i c & r i g g

er

2 . ' on g e s t i on& r i g g er


2 .L o a & r i g g er


3 . ' on g e s t i on& r i g g er

*. &raffic &rigger

*. &raffic &rigger

* . & r

a f f i c

& r i g

g e r

2 . ' o n

g e s t i o

n & r i g

g e r

* . & r

a f f i c

& r i g

g e r

2 . L o

a & r i g

g e r

* . & r a f f i c &

r i g g e r

* . & r a f f i c &

r i g g e r

HSDS&H D&H

HSDS&H 3A&H

HSDS&H P&H

D&H D&H

D&H 3A&H

3A&H P&H



HSDPA &ongestion &ontrol

HSDPA congestion control #eans how to #itigate resource congestion under the condition o" HSDPA

syste# resource congestion0

The resource o" HSDPA is shared and utili)ed in the #a7i#u#0 Thus the #ethod o" congestion control isslightly di""erent "ro# R-- cell0 HSDS&H resource congestion includes:

Power resource congestion

4i#ited HSDS&H tra""ic

Data through congestion

&ode resource congestion o" acco#panying DP&H

channeli)ation code

Conge&tion control etho'

of HSDPA 6ccupy in aance ： hen resource is congeste, the high-priority user can occupy the resource in aance from the

low-priority user. )t guarantees high-priority user can (e always assigne resources.

ueue ： &he users who has no a(ility to occupy in aance (ut has the ueue a(ility can (e put into the ueue an try

to access the resource again.

Decrease loa ： &he policy of ecreasing loa is ecreasing the spee. &hat is to ecrease the rate of users who has

high (ackgroun or interactie serices for spare resources

/SD# resource a1ustment ： #1ust the coe resource or power resource of /SD# to meet the reuirements of

users

! e s o ur c e

c on g e s t i on

6ccupy

in aance

ueue

Decrease

loa

/SD#

resource

a1ustment

) m pr o- e c al l s u c c e s s r a t e ,

) n c r e a s e s y s

t em c a p a c i t y


http://slidepdf.com/reader/full/hsdpa-principleppt 18/236?

HSDPA 4oad &ontrol

Decrease usa!le power o" HSDPA： ts ulti#ate goal is decreasing the PS data throughput0

Decrease PS data throughput ： Decrease the PS data rate on D&H0

Delete #acro diversity link ： Decrease the radio link o" overload cell to decrease the load0 3orced handover to another carrier or GS' syste# ： nter"reBuency handover and

intersyste# handover can !e used as the #ethod "or load trans"er to decrease the load o"

overload cell0

3orce so#e lowpriority users to drop their calls0

&he goal of loa control is to guarantee the system sta(ility.

)f the system is appropriately planne, then the access control

an packet scheuling can aoi the oerloa of the resources

(ut can not aoi the situation that the system is oerloa

inuce (y suenly user power increasing when the wireless

enironment is eteriorate. &hus raio resource management

nees to aopt loa control to let the system to (e sta(le.

%or the loa control, the ifference (etween /SD# an !"" is only

at the ownlink. &hus only the ownlink loa control metho is

escri(e here. &he policy of ecreasing loa inclues ：

+ * ' % l o a d

D'c%'as' o*'%all po,'% o$

HSD!-

D'c%'as' !S data th%o#.hp#t

D'l't' &ac%o di*'%sit/ li0k

o%c'd ha0do*'%

2 0 s #% ' t h ' s / s t ' &

s t a b i l i t /


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n"luence o" HSDPA to R-- RR' Algorith#

4y introucing /SD#, the relate /SD# physical channels are

ae. &hus !"" !MM algorithm is neee to (e upgrae ： # special hanling of /S-DS'/ an /S-S''/ coe resource

management

# access control metho of /S-DS'/

# power control metho of /SD#

# ynamic raio carrier control policy after introucing /S-DS'/

&he introucing of /SD# cell an hanoer characteristics of /SD#

physical channel affect the mo(ile hanoer ecision policy an hanling.

# loa (alancing characteristics for cells. #ffect the selection of loa

(alance estination cell an later hanling, eg., accompanying the transfer

(etween /S-DS'/ an D'/

5pate in congestion control

5pate in loa control



Agenda

HSDPA Theor-

HSDPA Ph-&ical .a-er

HSDPA /e- Technologie&

HSDPA !!$

HSDPA E(ol)tion



'o!ile &o##unication Develop#ent

Mo(ile communication is eelope from 2?@3?@3."?. )t is

eelope from mo(ile oice serice to high spee ata serice. 'urrently it is eelope to 3.A?. %or 'DM#, commercial !A

ersion an trial !+ ersion can (e proie now.

3? is working on the stanars of !B8/S#C an !8L&=. )t is

estimate that !B will (e finalie on 200B an ! will (e finalie on

200.

&he eelopment of raio technology pays more attention to the

reuirement of operator E <?M< organiation propose the system

eelopment goal.

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'o!ile &o##unication Technology Fvolution

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