参考成果讲稿td-scdmatraining

TD-SCDMA原理与测量Agilent

Technologies

培训Agenda3G

Mobile

Communication

System

and

Standard

OverviewTD-SCDMA

System

and

Standard

EvolutionTD-SCDMA

Air

Interface

TechnologyTD-SCDMA

Test

StandardTD-SCDMATest

solution

and

MethodLabs

GuideAgilent

Technologies

培训3G

Mobile

Communication

System

and

StandardOverviewWireless

Communication

OverviewCellular

communication

Technology

and

Service

overviewMobile

Customer

MarketIndustry

trend

for

data

and

multi-media

application3G

development

history3G

systemMeasurement

challenge

for

3G

equipmentAgilent

Technologies

培训Wireless

Communication

Overview2GIS-136TDMAPDCGSMIS-95AcdmaHSCSDiMode2.5GGPRSIS-95Bcdma3GE-GPRSEDGEIS-95Ccdma2000W-CDMAFDDW-CDMATDDTD-SCDMALCR-TDD3.5GHSUPAFDD

&

TDD1xEV-DOReleaseB1xEV-DORelease

A1xEV-DORelease0HSDPAFDD

&

TDD3.9GUMBcf

802.20LTEE-UTRAEdgeEvolutionHSPA+802.16eMobileWiMAXTM802.11g802.11a802.11b802.16dFixedWiMAXTM802.11n802.11hWiBROIncreasing

efficiency,

bandwidth

anddata

ratesAgilent

Technologies

培训COVERAGEIMT-2000DIGITALOGLOCALNATIONALINTER-NATIONALGLOBAL198519921G2G2G+3GOGSPEECHDIGITALSPEECHSMS,IMPROVEDSPEECHHIGH

BIT

RATESERVICESSERVICESAMPS,TACS,NMTGSM,NADCCDMA,PDCHSCSD,GPRSEDGE

1995WidebandCDMA,(WCDMA

/

CDMA2000)WTDMA2000Cellular

Communication

Technology

and

ServiceOverviewAgilent

Technologies

培训Mobile

Customer

Market500000100000150000200000250000300000单位：万户移动用户

固定用户

互联网用户Over

2.6

bil

mobile

subscribers

by

2006.4.5

bil

mobile

users

are

expected

by

2020.864202006

2007

2008

2009

201095'

96'

97'

98'

99'

00'

01'

02'

03'

04'

05'

06'.9The

total

No.

of

Chinese

mobileusers

surpassed

500

mil;

half

ofthe

annual

growth

now

is

fromrural

area.

Enough

space

formore

growth.

It’s

expected

tohit700

mil

mobile

users

by

2010and

1

bil

by

2020.亿Agilent

Technologies

培训Industry

trend

for

data

and

multi-media

applicationMultimedia

content:

including

graphics,

clips,music,

locator

services,

games

and

directories

formattedespecially

for

mobile

handsets.Multimedia

Messaging:

Any

combination

of

photos,clips,

audio

clips,

graphics

or

text

can

be

sent

to

anothermobile

handset,

PC

or

other

device.

"Mobile

broadcasting"

ofmedia

(such

as

news)

to

many

terminals

simultaneously

issimilar

to

cell

broadcasting

for

SMS.Internet/Extranet

Access:

Mobileaccess

to

e-mail,

rich

web

content,

corporate

networkresources

etc.Rich

Voice:

Two-way

real-timeenhanced

voice,

and

other

formsof

data.Agilent

Technologies

培训Mobile

Data

MarketAgilent

Technologies

培训3G

Development

HistoryJune

1998

Terrestrialair

interface

proposals

(UTRAN,WCDMA(s),

CDMA2000(s),

EDGE,

EP-DECT,

TD-SCDMA)

werehanded

into

ITU-ROctober

1,

2000

SK

of

Korea

launches

thecommercial

cdma2000networkOctober

1,

2001

NTT

o

launched

the

commercialWCDMA

3G

mobile

networkJanuary

28,

2002

SK in

Korealaunched

the

world'scommercial

CDMA2000

1xEV-DOMarch

14,

2002

(Freeze

date)

UMTS

Release

5

(the

initialdate

was

December2001)December

16,

2004

(Freeze

date)

UMTS

Release

6

(the

initialdate

was

June

2003)Agilent

Technologies

培训TDSCDMA

Development

History1995

Pre-research

on

TD

techProposal

submitted

in

1998.

Approved

as

3G

standardin

’00

&’012002

&2003

Verification

of

techs

and

3G

spectrumallocation

scheme

announced2004

Initial

establishment

of

TD

ecosystem2005

Completed

TD

ecosystem

Industrialization

specialtest2006

Large-scale

TD

trial2007

Extended

large-scale

TD

trialAgilent

Technologies

培训3G

SystemTo

Meet

the

High

Speed

Data

Requirements,

a

3-GSystem

must

Support:144

kbps

Data

for

High

Speed

VehicularEnvironment384

kbps

Data

for

Pedestrian

or

Low

SpeedVehicular

Environment2

Mbps

Data

for

Stationary

EnvironmentIndoor

OfficeWireless

Local

LoopAgilent

Technologies

培训Measurement

challenge

for

3G

equipmentIncreased

complexity

in

3G

systemsFormat-specific

challenges

&

solutions3GPP

&

IS-2000:

Use

CCDFto

determine

correctstimulus3GPP

&

IS-2000

:

Use

CDP

to

yze

code

channelsat

different

rates3GPP

&

IS-2000

:

Map

3G

signals

onto

knowncons

lations–

Measure

the

uncoded

EVM

for

an

indication

ofmodulation

accuracyAgilent

Technologies

培训CCDF

measurement

with

the

single

code

channeland

multi

code

channelYou

performed

a

CCDF

measurement

using

a

single

codechannelWhat

happened

when

you

added

3

more

code

channels?Agilent

Technologies

培训Use

CDP

toyze

code

channels

at

different

ratesAgilent

Technologies

培训Map

3G

signals

onto

known

conslations3GPP

signal

mapped

onto

a

QPSK

conslationAgilent

Technologies

培训TD-SCDMA

System

and

Standard

Evolution3GPP

system

structure

overview3GPP

TDD

standard

overviewTD-SCDMA

standard

development

historySCDMA

technologyTSM

technology3GPP

LCR

TD-SCDMA

standardComparisonbetween

3GPP

LCR

and

TSMComparison

between

3GPP

LCR

and

3GPP

HCRTD-SCDMA

technology

evolutionCurrent

TD-SCDMA

enhancementTD-SCDMA

HSDPA3GPP

LTE

IntroductionAgilent

Technologies

培训3GPP

system

structure

overviewBS

=

BaseStation(Node

B)RNC

=

Radio

NetworkControllerM

S

C

&

V

L

RB

S

CB

S

CRNCB

T

SB

T

SB

ST

RA

UT

R

A

UIW

UH

L

R

&

AC&

EIRIP

NetworksIP

NetworksPSTNISDNValue

AddedService

Platform(s):SMSC,

VMS,MessagingINHW/

SW

ChangesSGSNGGSNIP

BackboneAgilent

Technologies

培训3GPP

TDD

standard

overviewTDMA:

UMC136(FDD),

E-DECT(TDD)CDMA

FDD3GPP:

DS

CDMA3GPP2:

MC

CDMAUTRA

TDD1.28Mcps

TDD(TD-SCDMA)3.84Mcps

TDDAgilent

Technologies

培训SCDMA

TechnologyProposed

and

Developed

by

XinWei

CommunicationTechnology

in

1995DaTang

proposed

TDSCDMA

to

ITU

based

onSCDMA

Technology

in

1998Many

same

key

technology

with

TDSCDMA

includingTDD,

Smart

Antenna,

uplink

Synchronization,

SoftRadioThe

market

orientationis

Wireless

ephoneMarket

Succeed

in

some

of

Chinese

cityAgilent

Technologies

培训TSM

TechnologyTSM（TD－SCDMAoverGSM），基于TSM标准的系统其实就是在GSM网络支持下的TD－SCDMA系统。TSM系统的思想就是在GSM的网上使用TD－SCDMA的设备，其A接口和Gb接口与GSM完全相同，只需对GSM的控制器进行升级。一方面利用3G的频谱来解决GSM系统容量不足，特别是在高密度用户区容量不足的问题，另一方面可以为用户提供初期最高达384kbit/s的各种速率的数据业务，所以基于TSM标准的TD－SCDMA系统对已有GSM网的运营商是一种很好的选择Agilent

Technologies

培训Comparison

between

3GPP

LCR

and

TSMFeature

comparisonLCRTSMPhysical

Channel3GPP

based

PHY

channelDPCH(RMC12.2k-384k)DwPCH,UpPCHP-

CH,S-

CH,PRACH,PDSCH,PUSCH,PICH,FPACH,HS-PDSCH,HS-SCCH,HS-SICHGSM

based

PHY

channelDPCH,P-

CH,S-

CH,P-RACH,

PDPCHDwPTS,UpPTSRU

map

from

logicalchannelonto

physical

channelMulti

time

slot

(SF16,8,4,2,1)Single

time

slot

(SF16,8)Multiframe

configuration

bySignal

StudioSupportedS1/S2

phase

rotationflexible

setupNot

supportedEither

S1

or

S2

phase

rotation

fixedsetupControl

symbolTFCI,TPC,SSSlot

Format

supportStF,PC,SSTransport

layer(Logical

Channel)3GPP

baseDCH,BCH,FACH,PCH,RACH,USCH,DSCH,HS-DSCHGSM

baseTCH-T/EFS,HS,9.6(M),14.4(M)SACCH-T,CSACCH-T,FACCH-T/H,F,SDCCH-TBCCH,CBCH,NCH,FACH,RACH,AGCH,PCH,FNICH,HOACH,PKCHCode

interference

signalforRFconformance

testSpecified

as

DPCHoNot

specifiedAgilent

Technologies

培训Comparison

between

3GPP

LCR

and

3GPP

HCRMultiplex

technologyBandwidthFrequency

Re-useHandoverModulationChip

Ratemax.

Datarate

(ETSI)Spreading

FactorTransmissionTDD

LCRTD-CDMA1*1.6

MHz

unpaired1BatonQPSK1.284Mcps384

kbps

(high

mobility)1,

2,

4,

8,

169

TimeslotsTDD

HCRTD-CDMA1*5

MHz

unpaired1HardQPSK3.84

Mcps2

Mbps

(low

mobility)1,

2,

4,

8,

1615

TimeslotsAgilent

Technologies

培训TD-SCDMA

technology

evolution3GPP(R4)Voice/Data3GPP(R8)2002--20042005---20072006--2008BasicEnhancedLong

Term

EvolutionIMT-Advanced.LTE

FDD/TDD4GPhase

1CDMA

BasedPhase

3OFDM

BasedPhase

23GPP(R5/6/7)HSPA/HSPA

+MBMSWCDMA/TD-SCDMALTE

FDD/TD-SOFDM2012

&beyondAgilent

Technologies

培训TD-SCDMA

HSDPA3GPP

R5

characterKey

technology

and

specHS-DSCHAMC

(16QAM

&

QPSK)HARQFast

scheduling5ms

TTI,

at

most

5

downlink

slots

used

inone

carrierTheoretical

peak

data

rate

2.8Mbps

@1.6MHzAgilent

Technologies

培训TD-SCDMA

HSDPA

UE

CategoryReferencecombination0.5Mbpsclass1.1Mbpsclass1.6Mbpsclass2.2Mbpsclass2.8Mbpsclass1.28

Mcps

TDDHS-DSCH

CategoryCategory1Category4Category7Category10Category13ModulationQPSKQPSK/16QAMQPSK/16QAMQPSK/16QAMQPSK/16QAMMax

Slots

No.22345Max

Code

ch.No.

per

slot1616161616Max

Transportsize/TTI2788560084161122614043Max

coding

rate11111Agilent

Technologies

培训3GPP

LTE3GPP

R4R5R6R7R8R9(?)IMSHSDPAWLAN

I/WMBMSHSUPAHSPA+LTE/SAELTE+

(?)LTE

V12008.03UTRAN

Long-TermEvolution

(LTE)(2004.11)IMT-Advanced2010.10StandardizationIndustrializationRelease

99/4TD-SOFDMRelease

5/6/720002004★2008★★

2010Agilent

Technologies

培训3GPP

LTEAgilent

Technologies

培训LTE

PhysicalLayerDownlink:

Adaptive

OFDM–

Channel-dependent

scheduling

and

linkadaptation

in

time

and

frequencyUplink:

SC-FDMAwith

dynamic

band

width

(Pre-coded

OFDM)–

Lo

PR

-Higher

power

efficiency–Reduced

uplink

interference

(

enables

intra-cell

orthogonality

)Agilent

Technologies

培训3GPP

LTE

Physical

LayerDownlink:

Adaptive

OFDMUplink:

SC-FDMAAgilent

Technologies

培训3GPP

LTE

TDDTD-SOFDM

=

3GPP

LTE

TDDOFDM

means

-Orthogonal

Frequency

Division

Multiplexingtechnology

for

wireless

interfaceS

represent

-SA:

Smart

AntennaSynchronization

:

Synchronization

technologyTD

represent

-TD-SCDMA

family

technologyTDD

modeAgilent

Technologies

培训TD-SOFDM

TechnologyDuplex

modeTDDBandwidth

(MHz)1.6、3.2、5、10、15、20Multiple

Access（DL/UL）OFDMA/SC-FDMAModulationQPSK,

16QAM,

64QAMChannel

codingConvolutional,

Turbo

codingSub-carrier

spacing

(Hz)15K,

7.5KMulti-antenna

technologyBeam-forming（support>4

antennas）MIMO：2x2、4x2,、4x4;Transmit

diversityTraffic

channel

(DL/UL)Shared

channel/fast

schedulingLink

AdaptationAMC/HARQMobility350

km/hPeak

data

rate

(20M)DL:

100Mbps；UL:

50

Mbps；Spectrum

efficiencyDL:5

bps/HzUL:2.5

bps/HzEnd-to-end

latency10msAgilent

Technologies

培训TD-SCDMA

Air

InterfaceTechnologyTD-SCDMA

air

interface

overviewDuplex

and

multiple

accessAdvantage

and

disadvantage

of

TD-SCDMAAgilent

Technologies

培训TD-SCDMA

air

interface

overviewTD-SCDMAW-CDMATDD 40

+

15

+

100

MHzFDD 60

MHzModeFrequency

Band1.6

MHz5

MHzAvailability155MHzFrom

2003

on40

MHz60

MHz30MHz15MHz85

MHz60

MHzFDD

(uplink)FDD

(downlink)TDDSa lite

TDDVoid217018802400RF

Bandwidth2300Air

interface1920

19802010

2025

2110

DuplexSpacing190

MHz

TDD100

MHzAgilent

Technologies

培训Duplex

methods

of

3G:

FDD,

TDDuplink

anddownlinkFDDTDDUplink

and

downlinktransmission

is

in

asingle

frequencyWith

asymmetrictransmission

uplink

andan

bedown

link,

dtransmitted

moreefficientlyUplinkDownlinkUnusedSavinginspectrumTailored

for

asymmetricservicesUplinkUplink

and

downlinktransmission

is

in

twoseparate

frequencies.Besides,

a

bigguardbandis

neededUDDDDUplink

is

paired

withdownlink

both

of

whichconsume

equal

spectrum,even

when

data

loads

areunbalancedDownlinkLegend:

UDUDDDDAgilent

Technologies

培训Advantages

of

TDDFlexible

in

spectrum:

Requires

unpaired

frequency

bandsonlyIt

is

difficult

to

find

paired

frequency

bands

under

2GHzSame

frequency

for

uplink

and

downlink:

Smart

antennacan

be

usedSupport

asymmetric

serviceLow

cost

for

Node

BLower

power

PA

with

smart

antennaHigh

spectrum

efficiency

leveraged

by

Smart

Antenna,JD

and

TDD.Agilent

Technologies

培训Disadvantages

of

TDDPeak

to

average

power

ratio

isincreased

with

slotnumber:

short

transmit

distance–

Higher

PAPR

for

TDM(A)Cell

radius

is

limited

by

transmission

delay:

In

general,the

cell

radius

is

less

than

10km.Discontinuous

transmission:

More

sensitive

to

fastfading

and

Doppler

effectAgilent

Technologies

培训How

to e

the

shortages?The

shortage

of

TDD

leads

to:TDD

canonly

be

used

in

Micro-

and

Pico-cellTDD

can

only

support

slow

movingPossible

way

to e

the

shortagesSmart

antenna:

increase

sensitivitySmart

antenna

plus

Joint

detection:

improveperformance

in

fast

fading

(multi-path

in

high

speedmoving)Agilent

Technologies

培训Basic

principle

of

TD-SCDMA(1)FrequencyTimePowerdensity(CDMAcodes)available

RUused

RU

for

asymmetrical

trafficDLUL1.6

MHz0:15TS3

TS4

TS5

TS6

TS0TS1

TS2DL/UL

Separation2.

Carrier(optional)TD-SCDMA

based

on

the

backbone

of

TDMA-TDDoperation3.

Carrier(optional)1.6Mhz

per

carrier7

timeslotsper

frame16

codes

per

timeslotAgilent

Technologies

培训Basic

principle

of

TD-SCDMA(2)A

Basic

Resource

Unit

(RU)

forTD-SCDMA

is

defined

bythe

timeslot(TS),frequency,

channelization

code

andspreading

factor.BASIC

RUor

RUSF160:15TSTSTSTSTSRUSF8RUSF4RUSF2RUSF1Agilent

Technologies

培训Key

features

of

TD-SCDMAAdvanced

3G

services

allow

high

speed

data,

packet

data,multimedia

and

excellent

voice

quality

by

connecting

TD-SCDMARAN

to

the

GSM/GPRS

network.Access

to

new

UMTS

spectrum

resources

increase

the

networkcapacity.Outstanding

Spectrum

efficiency

ensures

economic

use

ofspectrum.Support

of

all

radio

network

scenarios

allows

full

service

coverage.Best

suited

for

mobile

Internet

3G

applications

provided

by

theinherent

flexibility

of

the

technology.Flexibility

for

asymmetric

traffic,

data

rates

and

radio

resourceallocation,

allowsoptimum

adaptation

of

the

radio

access

to

theactual

traffic

load

within

the

network.Agilent

Technologies

培训TD-SCDMA

Air

InterfaceTechnologyTD-SCDMA

physical

layerChannel

mapPhysical

channelTransport

channelFrame

and

burst

structureSync

code,

midamble

and

scramble

codeChannel

coding

and

interleavingModulation

map :

QPSK

and

16QAMOrthogonal

code

spreadingAgilent

Technologies

培训TransportChannelTransport

channels

are

the

services

offered

by

layer

1

to

thehigher

layers.A

transport

channel

is

defined

by

how

and

with

whatcharacteristics

data

is

transferred

over

the

air

interface.A

general

classification

of

transport

channels

is

into

twogroups:Dedicated

Channels,

using

inherent

addressing

of

UECommon

Channels,

using

explicit

addressing

of

UE

ifaddressing

is

neededAgilent

Technologies

培训Transport

channelsTransport

channelType

anddirectionUsed

forDCH(Dedicated

channel)Dedicated;

uplink

anddownlinkUser

or

control

information

to

a

UE

(entire

cell

or

part

of

cell

(lobe-forming))BCH(Broadcast

channel)Common;

downlinkBroadcast

system

and

cell

specific

informationFACH(Forward

access

channel)Common;

downlinkControl

information

when

system

knows

UE

location

orshort

user

packetsto

a

UEPCH(Paging

channel)Common;

downlinkControl

informationto

UEs

when

good

sleep

mode

properties

are

needed,e.g.

idle

mode

operationRACH(Random

access

channel)Common;

uplinkControl

information

or

short

user

packets

from

a

UEDSCH(Downlink

shared

channel)Common;downlinkCarries

dedicated

user

data

and

control

information

using

a

shared

channel.HS-DSCH(High

Speed

Downlinkshared

channel)Common;downlinkA

downlink

channel

serving

several

UEs

carrying

dedicated

control

ortraffic

data.

HS-DSCH

offers

the

possibility

for

high-speed

downlinkpacketaccess

through

the

support

of

higher-order

modulation,

adaptive

modulationand

coding,

fast

channel-dependent

scheduling,

and

hybrid

ARQ

with

softcombining.USCH(Uplink

shared

channel)Common;UplinkCarries

dedicated

user

data

and

control

information

using

a

shared

channelAgilent

Technologies

培训Physical

ChannelPhysical

Channels

have

a

three

Layer

Structure:Timeslot:

675

usec

slot

consisting

of

a

number

ofSymbolsRadio

frame:5

ms

frame

consisting

of

7

timeslotsSystem

fra

mberingTime

slots

are

used

inthe

sense

of

a

TDMA

component

toseparate

different

user

signals

in

time

and

code

.Code :

OVSF

code

with

a

spreading

factorof

1,

2,

4,

8,

or

16.Agilent

Technologies

培训Frame

structure(1)UpPTS(160chips)DwPTS(96chips)GP

(96chips)Switching

PointSubframe5ms

(6400chip)Switching

PointTs0Ts1Ts2Ts3Ts4TS5TS6Multi-frame

n*10msFrame

No.mFrame

m+n-1Radio

Frame

(10ms)Super

Frame

(720ms)Subframe

No.0Subframe

(5ms)The

frame

structure

hastakensome

new

technologies

intoconsideration,

either

smart

antennaor

uplink

sync.Agilent

Technologies

培训Frame

structure(2)The

time

slots

for

the

uplink

and

downlink

are

separated

by

aswitching

point.

There

are

two

switching

points

in

each

sub-frame.TS0

is

alwaysallocatedas

downlink.TS1

is

always

allocatedas

uplink.Three

special

time

slots:DwPTS:

downlink

pilot

time

slot,

96

chip

durationUpPTS:

uplink

pilot

time

slot,

160

chip

durationGP:

main

guard

period

for

TDD

operation,

96

chip

durationThe

system

can

operate

on

both

symmetric

and

asymmetricmode

by

properly

configuring

the

number

of

downlink

anduplink

time

slots.Agilent

Technologies

培训General

considerationWhy

need

sub-frameOne

radio

frame

is

10ms,

in

120kmphmoving

speed,

the

location

changewill

be

0.34m=2λ(2GHz)In

smart

antenna

system,

somealgorithm

ask

high

sensitivity

of

phase(location)But

too

short

sub-frame

can

notarrange

enough

TSsWhy

7

main

TSs

in

asub-frameMore

TSs

will

be

more

flexible

forasymmetric

servicesSize

of

one

TS

shall

capable

ofsupporting

a

voice

channel

(8kbpswith

R=1/2

coding)LocationchangeUp-link

beamformingwith

co-phase

of

two

raysSame

down-linkbeamforming

maylead

phase

oppositeAgilent

Technologies

培训Special

Time

slotsDwPTS:

total

75us,

96

chips8

bits

code,

total

32

codes32c

guard

period

to

separatewith

TS0UpPTS:

total

125us,

160

chips16

bits

code,

total

128

codes32c

guard

period

to

separatewith

TS1GPtotal

75us,

96

chips,

max

cell

size64c128c32c32cGPTS0TS1DwPTSUpPTSAgilent

Technologies

培训DwPTS:

Downlink

Pilot

Time

SlotUsed

for

downlink

synchronization

and

cell

initial

searchConsists

of

96

Chips,

75

s:

32

chips

for

guard

period,

64

chips

forsynchronizationThe

guard

period

can

be

used

to

avoid

theinterferencebetween

the

lastdownlink

traffic

timeslot

and

the

downlink

synchronization

pilot

burst.32

group

different

SYNC-DL

codes,

used

to

distinguish

different

BSTransmit

in

all

direction

and

no

beam

formingGP

(32chips)SYNC(64chips)75

sAgilent

Technologies

培训GP:

Guard

Period96

Chips,

75

sUsed

for

guard

the

switching

between

uplink

and

downlinkInsure

that

an

UE

transmitting

the

UpPTS

does

not

disturb

the

receptionof

the

DwPTS

for

otherUEs

being

close

by.Determine

the

coverage

area

of

BS–

Interferencescenarios

and

the

corresponding

max.cell

radiusCaseMax.

cell

radiusno

UpPTS

–

DwPTS

interference

allowed11.25

kmUpPTS

–

DwPTS

interference

allowed,but

nointerferenceto

TS0

allowed22.5

kmno

TS1

–

DwPTS

interference

allowed,

otherinterference

allowed30

kmTS1

–

DwPTS

interference

allowed,

but

nointerference

to

TS0

allowed41.25

kmAgilent

Technologies

培训UpPTS:

Uplink

Pilot

Time

slotUsed

for

uplink

initial

synchronization,

random

access，and

measurement

for

adjacentcell

when

handoff160

Chips:

128

for

SYNC，32for

GPThe

GP

fields

are

used

to

separate

the

uplink

pilot

from

the

traffic

uplink

time

slot.There

are

256

different

codes

for

SYNC,

which

can

be

divided

into

32

groups

and

eachgroup

includes

8

different

SYNC

codes,

i.e.,

each

BS

has

8

determinate

SYNC

codes.BTSC

get

initial

parameters

of

beam

forming

from

the

uplink

signal

of

terminalGP

(32chips)SYNC(128chips)125

sAgilent

Technologies

培训Burst

structureEach

slot

is

864

Chips

long,

675s；Two

data

fields

and

each

consists

of

352

Chips

and

including

the

TPC

bits

for

powercontrol,

the

TFCI

bits

and

the

additional

uplink

synchronization

bits(synchronizationshift)

ifneeded

；Midamble

consists

of

144

Chips；Guard

period

consists

of

16

Chips,

used

for

protectionbetween

timeslots

to

avoid

thelong

delay

multi-path

interference；Data352chipsMidamble144chipsData352chipsGP16675

sAgilent

Technologies

培训Transmission

of

TFCI,

TPC,

SSData

symbolsMidambleTime

slot

x

(864

Chips)SS

symbolsData

symbolsGP1

st

partof

TFCITPC

symbols2nd

partof

TFCIData

symbolsMidambleTime

slot

x

(864

Chips)SS

symbolsData

symbolsGP3

rd

part

of

TFCITPC

symbols4

thpart

of

TFCIRadio

Frame

10ms5ms5msIncluded

inthe

Data

symbol

fields

of

the

burst

if

they

areneeded.Subject

to

the

same

spreading

procedure

as

data

bits.TFCI:

Transport

Format

Combination

IndicatorTPC:

Transmit

Power

ControlSS:

Synchronization

Shift,

command

atiming

adjustmentAgilent

Technologies

培训MidambleConsists

of144

chips,

forming

128

basic

midamble

sequences

with

128

chipslong128

sequences

divided

into

32

group

to

corresponding

to

32

SYNC-DL

codes,

andeach

group

consists

of

4

different

basic

midamble

sequence,

i.e.,

each

BS

has

4different

midamble.Used

as

training

sequenceChannel

estimate

for

uplink

and

downlinkPower

measurementKeep

uplink

synchronizationAgilent

Technologies

培训General

considerationWhy

useof

midamble

and

the

length

ofit?Training

sequence,

forQPSK

modulationJDUp-link

synchronizationDifferent

with

user

and

cellLength

of

midamble?Longer

is

better

for

JDShorter

is

good

for

higherefficiencyMidamble

of

144chipsIt

can e

delayspreading

of

25usService

data

area,

total

704

chips.

Itcan

provide

44

symbols

(SF=16)

or17.6kbps

data

rate

in

QPSKGuard

period

of

16

chipsfor

switching

point

and

toavoid

overlap

because

ofMulti-path

with

long

delayTotal

675us/864

symbolsAgilent

Technologies

培训Midamble

AllocationMidambles

are

part

of

the

physical

channel

configurationwhich

is

performed

by

higher

layers.

Three

different

midambleallocation

schemes

existUE

specific

midamble

allocation:

A

UE

specificmidamble

for

DL

or

UL

is

explicitly

assigned

by

higherlayers.Default

midamble

allocation:

The

midamble

for

DL

orUL

is

allocated

by

layer

1

depending

on

the

associatedchannalisation

code.Common

midamble

allocation:

The

midamble

for

theDL

is

allocated

by

layer

1

depending

on

the

number

ofchannalisation

codes

currently

being

present

in

theDL

time

slot.Agilent

Technologies

培训CodeGroupAssociated

codesSYNC-DLSYNC-ULScrambling

codeMidamble

codeGroup

100…700112233Group

218…1544556677……Group

3231248…255124124125125126126127127Code

allocationAgilent

Technologies

培训Transport

vs.

Physical

Channels3GPP

Supports

the

Concept

of

MultipleServices

Sharing

a

Physical

Connec