lte fdd全版培訓(xùn)模板用戶版

2

|

Presentation

Title

|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010LTE

=

E-UTRANE-UTRAN

=

UE

+

eNBEPC

=

MME

+

SGW

+

PGWEPS

=

E-UTRAN

+

EPC演進(jìn)分組系統(tǒng)Evolved

Packet

System（EPS）3

|

Presentation

Title

|

Month

2010s?

Alca-Lucent

Shanghai

Bell20101LTE業(yè)務(wù)特質(zhì)LTE的業(yè)務(wù)特質(zhì)s?Alca

-Lucent

Shanghai

Bell

20104

|

Presentation

Title

|

Month

20103GPP標(biāo)準(zhǔn)演進(jìn)Release

99:WCDMA

March20002000200220042010Release

5:HSDPA,

IMSMarch

2002Release

6:HSUPA,

MBMSMarch

2005Release7:

HSPA+MIMO,

HOM,

CPC,network

architectureSept

20072006Release

8:HSPA+

reduced2008Kickoff

in

RANLTE

workshopNov

2004LTE

FeasibilityStudy

initiatedDec

2004LTE

Work

ItemcreatedMarch

2006Release8:

LTEStage

3“complete”Dec

2007 latency,

multi-

carrier

2008UMTS/HSPA/HSPA+LTE2

Mbps

DL384

kbps

UL14.4

Mbps

DL384

kbps

UL14.4

Mbps

DL5.76

Mbps

UL28.8

Mbps

DL11.5

Mbps

UL43.2

Mbps

DL11.5

Mbps

ULs?Alca

-Lucent

Shanghai

Bell

20105

|

Presentation

Title

|

Month

2010智能高速簡(jiǎn)單堅(jiān)韌LTE移動(dòng)互聯(lián)LTE網(wǎng)絡(luò)特質(zhì)s?Alca

-Lucent

Shanghai

Bell

20106

|

Presentation

Title

|

Month

2010LTE要求和性能指標(biāo)

High

Peak

Data

Rates

100

Mbps

DL

(20

MHz,

2x2

MIMO)50

Mbps

UL

(20

MHz,1x2)Improved

Spectrum

Efficiency3-4x

HSPA

Rel’6

in

DL*2-3x

HSPA

Rel’6

in

UL1

bps/Hz

broadcastImproved

Cell

Edge

Rates2-3x

HSPA

Rel’6

in

DL*2-3x

HSPA

Rel’6

in

ULFull

broadband

coverageSupport

Scalable

BW 1.4,

3,

5,

10,

15,

20

MHz

Low

Latency <

5ms

userplane

(UE

to

RAN

edge)

<100ms

camped

to

active <

50ms

dormant

to

active

Packet

Only Simplified

network

architecture

Co-existence

with

UMTS/GSM

Interruption

time

<

500ms

for

NRT

Interruption

time

<

300ms

for

RT

無(wú)線接入網(wǎng)網(wǎng)s?Alca

-Lucent

Shanghai

Bell

20107

|

Presentation

Title

|

Month

2010L

TE-A目標(biāo)性能ItemLTE

RequirementLTE

ResultsLTE-A

RequirementPeak

Data

RateDL>

100Mbps(5

bps/Hz)326.4Mbps(4

layer)172.8

Mbps(2

layer)1

Gbps(30

bps/Hz)UL>

50Mbps(2.5

bps/Hz)86.4

Mbps

(64QAM)57.6

Mbps

(16QAM)500

Mbps(15

bps/Hz)LatencyC-planeIdle

Active<

100msec51.25

ms

+

3

*

S1

delay<

50

msDormant

(DRX)

Active<

50msecMuch

shorter

than

51.25ms<

10

msU-plane<

5msec4

ms<

5ms(better

thanLTE)移動(dòng)通信

s?Alca

-Lucent

Shanghai

Bell

20108

|

Presentation

Title

|

Month

20109

|

Presentation

Title

|

Month

2010s?

Alca-Lucent

Shanghai

Bell2010【LTE網(wǎng)絡(luò)進(jìn)展匯報(bào)】：全球LTE進(jìn)展及情況–GSA報(bào)告（2012/07-11）根據(jù)GSA的報(bào)告，截止

，全球已有101個(gè)國(guó)家的338家運(yùn)營(yíng)商投資LTE（包括LTE-FDD與TD-LTE）其中90個(gè)國(guó)家的280家運(yùn)營(yíng)商，承諾將部署LTE

網(wǎng)絡(luò)另有11個(gè)國(guó)家的58個(gè)預(yù)

LTE試驗(yàn)網(wǎng)已有45個(gè)國(guó)家中的89個(gè)LTE網(wǎng)絡(luò)，截至2012年底，將有150個(gè)LTE網(wǎng)絡(luò)投入s?Alca

-Lucent

Shanghai

Bell

201010

|

PresentationTitle|

Month

2010朗訊引領(lǐng)全球LTE試驗(yàn)網(wǎng)及 部署Trials

split

per

region12%

42%17%

EuropeAPACMiddle

East4%

North

AmeSouth

America25%LTE試驗(yàn)網(wǎng)LTE合同2570+700MHz

&

AWS

全力支持2010世博會(huì),TD-LTE規(guī)模試積極參與驗(yàn)網(wǎng)測(cè)試700MHz

&

2.6GHz唯一的端到端LTE網(wǎng)絡(luò)提供者，包括無(wú)線+網(wǎng)+IMS+

回傳+服務(wù)合同無(wú)線+回傳+NMS＋服務(wù)合同端到端LTE網(wǎng)絡(luò)提供者，包括無(wú)線+網(wǎng)+IMS+

回傳800MHz/rural/Wholesale

CONTRACT

TDD

TDD1800MHzTD-LTE

<E

FDDcoexistence Small

cells

TDTDDTDTDD

TDD

TDD

TDD

TDD

TDDTDD在7個(gè)國(guó)家進(jìn)行的13個(gè)TD-LTE試驗(yàn)網(wǎng)TDDTDD無(wú)線+

網(wǎng)+NMS＋服務(wù)合同37%26%4%21%12%Trials

split

per

regionEuropeAPACMiddle

East

North

AmericaSouth

America提供業(yè)界領(lǐng)先的端到端4G

LTE解決方案s?Alca

-Lucent

Shanghai

Bell

201011

|

PresentationTitle|

Month

2010AT&T

|

1億零3百萬(wàn)用戶Alca-Lucent

was

selected

as

equipmentr

forAT&T’s

LTE

mobile

broadband

network.

A

multi-yearagreement

will

allow

the

AT&T

to

take

full

advantage

ofcompatibility

between

existing

3Gequipment

anding

LTE

upgrades.Sprint

|

5500萬(wàn)用戶To

keep

up

with

never-before-seen

growth

in

mobileservice

usage,

Sprint

called

on

Alca-Lucent

to

bring

itsmultiple

solutions

together

into

one

seamless

networkwith

a

single

type

of

base

station

to

handle

everydifferent

kind

ofwireless

signal.

Drawing

on

Alca

-Lucent’s

completeunderstandingof

Sprint’sexistingnetwork

technologies,

these

changes

will

make

it

easierfor

the

company

to

meet

customers’

expectations—without

skyrocketing

operatingcosts.Verizon

Wireless

|

1億零9百萬(wàn)用戶A

major

network

infrastructure

partner

to

Verizon

Wireless,Alca-Lucent

is

helthe

company

grow

and

improvethe

performance

of

its

current

mobile

network

while

at

thesame

time

building

the

foundation

for

its

next-generation(4G

LTE)

network.

In

a

four-year

contract

expected

to

beworth

US$4

billion,

Verizon

will

continue

to

satisfy

itscustomers

with

advanced,

high-quality

wireless

services,employing

a

wide

range

of

technologies

from

Alca

-Lucent,

including

IP,

fiber

optics

and

microwave,

and

best-in-the-business

professional

integrationservices.Wireless

Subscribers

(as

of

Q4

2011)MillionsVerizon

Wireless109AT&T103T-Mobile

aSnprdinrtest

have

20%remaining

marketof

t5h5e朗訊攜手首要運(yùn)營(yíng)商推進(jìn)4G演進(jìn)s?Alca

-Lucent

Shanghai

Bell

201012

|

PresentationTitle|

Month

201013

|

Presentation

Title|

Month2010s?

Alca-Lucent

Shanghai

Bell2010【LTE網(wǎng)絡(luò)頻段介紹】：14

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010LTE頻率分配LTE早期主要使用2.1G,2.6G,以及700M歐洲運(yùn)營(yíng)商傾向于2.6G/DD/1800/2100M傾向700M和AWS中國(guó)電信LTE目前考慮的頻段為1.8G,2.1G,2.6G-Lucent

Shanghai

Bell

2010LTE頻段劃分UMTSFDDfrequency

band(60

MHz)New

IMT-2000frequencybandTD(7-S0CMDHMzA)mainfrequencyband(15

MHz)／A頻段TD-SCDMAsupplementaryfrequencyband(40

MHz)／F頻段：1880-1900（20MHZ）TD-SCDMA

supplementary

frequency

band(100MHz)15|

Presentation

Title

|

Month／201T0

DSCDMA

室內(nèi)E頻段2320──2

（s

H?

ZAlc）aNew

IMT-2000

frequency

band(100MHz)／LTE占用TDS室內(nèi)E頻段2350──2370（20MHZ）New

IMT-2000frequencyband(50MHz)／2.6G室外

LTE

D頻段：

2575-2595(20MHZ)LST

CMCC試驗(yàn)網(wǎng)頻段考慮CMCC

trial2.3GHz2.6GHz2350-2370MHz(E頻段的20M）2575-2595

MHz（D頻段）TD-SCDMA獲得了F頻段（1880～1900MHz），20MA頻段（2010～2025MHz），15ME頻段（2320～2370MHz），50ME頻段由于有軍方

干擾，只可用于室內(nèi)覆蓋移動(dòng)通信

16

|

Presentation

Title|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010移動(dòng)通信

17

|

Presentation

Title|

Month

2010s?Alca

-Lucent

Shanghai

Bell

201018

|

Presentation

Title|

Month2010s?

Alca-Lucent

Shanghai

Bell2010無(wú)線與固網(wǎng)定點(diǎn)價(jià)值的比較覆蓋范圍是無(wú)線的最大優(yōu)勢(shì)任何時(shí)間，任何地點(diǎn)覆蓋范圍使無(wú)線網(wǎng)的價(jià)值增加8-10倍如果LTE局限于不連續(xù)的熱點(diǎn)覆蓋，其價(jià)值將一落千丈（例如WiFi）LTE在高頻的覆蓋將是LTE網(wǎng)絡(luò)的一大19s?Alca

-Lucent

Shanghai

Bell

201019

|

PresentationTitle

|

Month

2010EVDO與LTE半徑的比較LTE:2.535GHzEVDO:835MHz半徑從目前情況來(lái)看，LTE的頻率可能在2.6GHz即使假設(shè)LTE的鏈路損耗與EVDO的相等(其實(shí)會(huì)差），與EVDO

850MHz系統(tǒng)相比，LTE將損失近

16dB16dB鏈路損耗將大大減少LTE的

半徑EVDOLTE20s?Alca

-Lucent

Shanghai

Bell

201020

|

PresentationTitle

|

Month

2010LTEEVDOTx

23Ant

18handoff

3diversity

1231740Gain

Subtotal4544cable

0.5fade

8.7indoor

26Iot

328.7245.5Loss

Subtotal38.240.2N

-174Nf

2.5BW

62.1S/N

0.6Sensitivity

-108.8-1743.560.9-4.7-114.3Path

Loss115.6118.1LTE和EVDO鏈路

的比較除了高頻損失，由于LTE可能需要較大的S/N，較多的房屋

損耗，導(dǎo)致 的鏈路損耗LTE，進(jìn)一步的覆蓋。21s?Alca

-Lucent

Shanghai

Bell

201021

|

PresentationTitle

|

Month

2010EVDOLTE鏈路半徑公里實(shí)際半徑公里鏈路數(shù)實(shí)際數(shù)鏈路半徑公里鏈路數(shù)密集市區(qū)0.460.382874250.2341096市區(qū)0.830.511945030.397846郊區(qū)2.251.211444950.943818農(nóng)村8.832.33263723.189372合計(jì)652密度實(shí)際

數(shù)是按人口密度及鏈路

布置的實(shí)際

數(shù)已是鏈路計(jì)算的數(shù)目的

倍因此，LTE

數(shù)在

需增加一倍s?Alca

-Lucent

Shanghai

Bell

201022

|

PresentationTitle|

Month

2010后續(xù)：LTE-A覆蓋與容量增強(qiáng)Enablers

for

improved

average

and

cell

edgethroughputsDL/UL

SU-MIMO

and

MU-MIMOAdvanced

BS

receivers

(Interference

RejectionCombining

(IRC)

andSuccessive

InterferenceCancellation)Interference

Coordination

(ICIC/Co-scheduling)Co-ordinated

Multipoint

transmission

(CoMP)Heterogeneous

Networks

&

Relayss?Alca

-Lucent

Shanghai

Bell

201023

|

PresentationTitle|

Month

201024

|

Presentation

Title|

Month2010?

Alca-Lucent

Shanghai

Bell20102LTE系統(tǒng)架構(gòu)sLTE扁平簡(jiǎn)潔SGWPDN

GWMMEPCRFLTE移動(dòng)業(yè)務(wù)終端無(wú)線網(wǎng)絡(luò)互聯(lián)網(wǎng)絡(luò)s?Alca

-Lucent

Shanghai

Bell

201025

|

PresentationTitle|

Month

20102G/3G網(wǎng)架構(gòu)，

與LTE/EPC架構(gòu)的

關(guān)系現(xiàn)網(wǎng)架構(gòu)GGSNEPS

（LTE+EPC)空口移動(dòng)性管理功能由eNB提供12BTSInternetSGSN4Backhaul

RNC(TDM/ATM)RNC在用戶平面的承載功能由SGW提供3回程技術(shù)從TDM/ATM轉(zhuǎn)向

IP/以太網(wǎng)

Backhaul

(IP/Ethernet)MSC話音和SGSN的用戶平面功能由

SGW提供RNC的控制平面功能被分配到

MME/eNBSGSN控制平面功能由MME提供CS

CorePS

Core5CS和PS 網(wǎng)統(tǒng)一為一張IP網(wǎng)GGSN的功能由PDNGW提供，QoS/HA支持業(yè)務(wù)QoS保障和移動(dòng)性的IP網(wǎng)絡(luò)6MMESGWPDN

GWeNBPCRFs?Alca

-Lucent

Shanghai

Bell

201026

|

PresentationTitle|

Month

201027

|

Presentation

Title|

Month2010s?

Alca-Lucent

Shanghai

Bell2010【

系統(tǒng)

接口

】：Evolved

UTRAN網(wǎng)絡(luò)結(jié)構(gòu)LTE-UuLTE-UuX2CX2UX2CX2UX2CX2US1-MMES1-MMES1-MMES1US1US1UUEUEeNBeNBeNBMMESGWIP

Transport

Network

(IP

Cloud)S1U

-

S1

UplaneS1-MME

-

S1

CplaneX2C

-

X2

CplaneX2U

-

X2

UplaneAP-

Access

Point

(for

IP

cloud)eUTRANEPCAPAPAPAPAPs?Alca

-Lucent

Shanghai

Bell

201028

|

PresentationTitle|

Month

2010Evolved

UTRAN網(wǎng)絡(luò)結(jié)構(gòu)eNBeNBeNBSGWMME/SGWX2Key

elements

of

networkarchitecture?

No

more

RNC?

RNC

layers/functionalitiesmover

in

eNB

and

SGW?

X2interface

for

inter-eNBmobility

(i.e.ontextforwarding)Key

elements

of

network

architecture

No

more

RNCRNC

layers/functionalitiesmover

in

eNB

andSGWX2

interface

for

inter-eNBmobility

(i.e.

d

ntextforwarding)eNB

Functions?

RRM?

Header

compression

&encription

of

data

streams?

UL/DL

resource

allocation?

Paging?

BCCH

info

over

the

air?

MME

selection

during

call?

Mobility

control

in

LTE_ActivestateeNB

FunctionsRRMHeader

compression

&encription

of

data

streamsUL/DL

resource

allocationPagingBCCH

info

over

the

airMME

selection

during

callMobility

control

in

LTE_ActivestateEPCE-UTRANS1S1S1S1

S1S1X2X2s?Alca

-Lucent

Shanghai

Bell

201029

|

PresentationTitle|

Month

2010LTE與其他網(wǎng)絡(luò)的互聯(lián)s?Alca

-Lucent

Shanghai

Bell

201030

|

PresentationTitle|

Month

2010eNB

BBU/RRH拉遠(yuǎn)結(jié)構(gòu)示意圖BBU與射頻拉遠(yuǎn)RRH單元間的CPRI光接口（單?；螂p模）CPRI接口與光纖BBU／RRH采用-48V直流供電(有利蓄電池備用供電）或-220V交直流轉(zhuǎn)換供電天饋系統(tǒng)3個(gè)RRH射頻拉遠(yuǎn)模塊＝3扇區(qū)發(fā)射1個(gè)BBU主控單元模塊，＝支持3個(gè)RRH射頻模塊高度2Us?Alca

-Lucent

Shanghai

Bell

201031

|

PresentationTitle|

Month

2010物理特性重量<13kg尺寸W482.6

x

H88.9

x

D275

mm單元1——BBU（型號(hào)9926）支持32

X2和16

S1接口數(shù)量產(chǎn)品特點(diǎn)支持A/F/D/E頻段可以

任何19英寸機(jī)架中，BBU設(shè)備高度2U控制板，基帶板可插拔僅有2種模塊，便于1塊控制板e(cuò)CCM1-3塊基帶板，可靈活配置(bCEM)支持靈活工作帶寬(10Mhz,20Mhz；15Mhz后續(xù)支持）s?Alca

-Lucent

Shanghai

Bell

201032

|

PresentationTitle|

Month

2010物理特性重量<18kg尺寸W300

x

H443

x

D172

mm產(chǎn)品特點(diǎn)2×40W功率輸出雙天線設(shè)計(jì)（RX／TX）支持MIMOCPRI光端口每線速率（3.12Gb/s）支持菊花

（4光纖端口）光端口硬件支持的拉遠(yuǎn)長(zhǎng)度：[多模光纖500米／單模光纖20公里]（具體實(shí)現(xiàn)還需

支持）工作溫度（零下40度-正50度）式風(fēng)冷設(shè)計(jì)負(fù)48伏直流供電密封設(shè)計(jì)標(biāo)準(zhǔn)(IP65)噪聲系數(shù)（2.2dB)支持TMA支持ASIG2.0/RET電子下俯仰調(diào)節(jié)單元2——1800M

RRU（型號(hào)MC-RRH

2*40-18）支持1800M頻段（3GPP

Band3)支持25M帶寬s?Alca

-Lucent

Shanghai

Bell

201033

|

PresentationTitle|

Month

2010EPS架構(gòu), 對(duì)傳統(tǒng) 網(wǎng)的影響與2G/3G

PS域相比，EPS架構(gòu)帶來(lái)前所未有的影響分組

的扁平化:-從3層結(jié)構(gòu)演變?yōu)閱螌咏Y(jié)構(gòu)-eNB直連MMEEPC完全

在移動(dòng)

(mobility)環(huán)境:移動(dòng)事件導(dǎo)致信令的大量增加直連接口連接所有eNBEPC網(wǎng)元節(jié)點(diǎn)需要支持分布和Pool部署變化的信令:-引入VoIP/IMS-Mto

M流量激增-“網(wǎng)絡(luò)推送”式業(yè)務(wù)EPC必須支持增加的信令負(fù)荷:空閑模式 (Idle

mode

tracking)空閑模式

需要

的尋呼HO管理需要?jiǎng)?chuàng)建大量專有承載支持語(yǔ)音業(yè)務(wù)更高的空口帶寬:－更大的回程帶寬(包括X2）－集成的IP包路由業(yè)務(wù)流量控制需求:EPC具備高帶寬擴(kuò)展能力支持策略控制應(yīng)用感知的流量分析s?Alca

-Lucent

Shanghai

Bell

201034

|

PresentationTitle|

Month

2010需要專為L(zhǎng)TE設(shè)計(jì)的全新EPCE-UTRANUTRANGERANSGWPGW/GGSNMMESGSNPCRF數(shù)據(jù)平面控制平面3GPP

coreWeb

2.0+數(shù)據(jù)平面：?吐量高（超過(guò)100Gbps),為高帶寬的按需業(yè)務(wù)

高性能、高可靠、高擴(kuò)展的業(yè)務(wù)?

每用戶、每應(yīng)用、每會(huì)話QoS/策略實(shí)現(xiàn)

感知的IP路由器控制平面：?

高度擴(kuò)展,動(dòng)態(tài)移動(dòng)和連接管理

高性能、高可靠、高擴(kuò)展的?

全網(wǎng)范圍的實(shí)時(shí)策略控制

ATCA平臺(tái)ATCA平臺(tái)500萬(wàn)用戶開(kāi)機(jī)，1秒40萬(wàn)條信令(mme),

鑒權(quán)／移動(dòng)管理HSS數(shù)據(jù)庫(kù)，500萬(wàn)用戶能力PCRF，提高VIP黏度7750＋MG-ISM板卡100G／400Gbps匯聚吞吐量，160Mpps小包轉(zhuǎn)發(fā)能力80Gbps深度包解析＋計(jì)費(fèi)＋I(xiàn)P地址分配s?Alca

-Lucent

Shanghai

Bell

201035

|

PresentationTitle|

Month

2010GxUTRANGERANeUTRANRN

CPacket

Data

Network(PDN)WMMSGSN/MME7750

SRGGSN/PGW5780

DSCPCRFSGiS1-US1-MMEIu-PSDirectTunnel(opt)Iu-PSGnGnS5S5Control

PlaneData

PlaneS117750

SRSGW當(dāng)前2G/3G

xGSN平臺(tái)升級(jí)LTE包處理能力將會(huì)大量消耗系統(tǒng)容導(dǎo)致更高的時(shí)延，更低的性能，性能/功能大打折扣。某些場(chǎng)景下，性能下降超過(guò)50%，當(dāng)引入新應(yīng)用和業(yè)務(wù)時(shí)性能和擴(kuò)展性下降則 。精細(xì)QoS更是

為力?，F(xiàn)有2G/3G分組 網(wǎng)升級(jí)，可能滿足融合網(wǎng)絡(luò)的短期過(guò)渡之需部署EPC設(shè)備兼容2G／3G功能，可以滿足大規(guī)模

選擇融合的無(wú)線分組網(wǎng)絡(luò)架構(gòu)（UWPC）：s?Alca

-Lucent

Shanghai

Bell

201036

|

PresentationTitle|

Month

2010LTE :

Flat-IP,

OFDM,

&

MIMO簡(jiǎn)單的包交換網(wǎng)絡(luò)結(jié)構(gòu)減少了網(wǎng)元數(shù)目用戶面和數(shù)據(jù)面完全分離空口采用OFDM技術(shù)在時(shí)變信道中的良

能，接收端不需要均衡器Scalable

OFDM可以使帶寬靈活擴(kuò)展時(shí)頻資源的聯(lián)合調(diào)度，增加了調(diào)度的靈活性采用MIMO技術(shù)支持1.2.4天線的MIMO,SU-MIMO.MU-MIMOs?Alca

-Lucent

Shanghai

Bell

201037

|

PresentationTitle|

Month

201038

|

Presentation

Title|

Month2010?

Alca-Lucent

Shanghai

Bell20103LTE

OFDMsLTE無(wú)線物理資源概念-資源塊（Resource

Block）fResource

Block

(RB)=

7

OFDM

Symbols

x

12SubcarrierLTE中最小的調(diào)度單元前三個(gè)OFDM

symbol用來(lái)傳輸信令(PCFICH,PDCCH,PHICH)一個(gè)OFDMsymbolSubcarrier資源粒子RESlot

(0.5

ms) Slot

(0.5ms)t

Subframe

(1

ms)15

kHzRB子幀小格──RE：時(shí)域上一個(gè)SYMBOL（一個(gè)SLOT＝7SYMBOL，頻域上面15KHZ）大格子──RB──LTE基本調(diào)度資源：2個(gè)TS（1MS），12個(gè)子載波）s?Alca

-Lucent

Shanghai

Bell

201039

|

PresentationTitle

|

Month

2010LTE無(wú)線技術(shù)-OFDM原理s?Alca

-Lucent

Shanghai

Bell

201040

|

PresentationTitle

|

Month

2010Serial

toParallel.

.

.IFFTbitstream.

.

.Parallelto

SerialD/AA/DSerial

toParallel.

.

.FFT.

.

.Basics

of

OFDM:

The

Full

OFDM

TransceiverIt

is

very

efficient

to

make

use

of

the

fast

Fourier

transform

(FFT)

algorithm

inorder

toimplement

the

IDFT

and

DFT

operations

in

the

transmitter

and

receiverOFDM

TransmitterOFDM

ReceiverParallelto

SerialaddCPRFTxRFRxremoveCPEncoding

+Interleaving+ModulationDemod+de-interleave+

decodeEstimatedbit

streams?Alca

-Lucent

Shanghai

Bell

201041

|

PresentationTitle

|

Month

2010LTE

Uplink:

DFT-SOFDMA-1DFT

spreading

of

modulation

symbols

reduces

PAPR,

but

also

leads

to

thepossibility

of

inter-symbolinterference

(ISI)In

OFDM,

ea

odulation

symbols

“sees”

a

single

15

kHz

subcarrier(flat

channel)InDFT-SOFDM,

ea

odulation

symbol

“sees”

a

wider

bandwidth

(i.e.

m

x

180KHz)→

if

channel

is

frequency

selective

within

allocated

bandwidth

the

we

get

ISIEqualization

is

required

in

the

SC-FDMA

receiverSimple

one-tap

frequency

equalization

facilitated

byuse

ofCPOFDMADf

=

15

kHz+

1

-1

-1

+

1

-1

-1

+

1

-1

+

1

+

1

+

1

-1SC-FDMA+

1

-1

-1

+

1

-1

-1

+

1

-1

+

1

+

1

+

1

-1DFT

pre-codings?Alca

-Lucent

Shanghai

Bell

201042

|

PresentationTitle

|

Month

2010LTE

Uplink:

SC-FDMAvia

DFT

pre-coded

OFDMASC-FDMA

implemented

using

an

OFDMA

front-end

and

a

DFT

pre-coder,

thisis

referred

to

as

DFT-spread

OFDMA(DFT-SOFDMA)Advantage

is

that

numerology

(subcarrier

spacing,

symbol

times,

FFT

sizes,

etc.)can

be

sharedbetween

uplink

and

downlinkAllocation

of

variable

bandwidth

in

units

of

12

subcarriers

(same

as

downlink)0000L-1

zerosL-1

zerosL-1

zerosDFTfrom

DFTto

IFFTto

IFFTLocalizedfromDistributedRejected

in

3GPP

due

topoor

channel

est.performance

andsensitivity

to

frequencyoffsetSerial

toParallelIFFTbitstream.

.

.Parallelto

SerialaddCPEncoding

+Interleaving+Modulation.

.DFT.

.

..

.SubcarriermapNo

in-cell

interference

-different

users

use

differentsubcarriersNo

in-cell

interference

-different

users

use

differentsubcarrierss?Alca

-Lucent

Shanghai

Bell

201043

|

PresentationTitle

|

Month

201044

|

Presentation

Title|

Month2010?

Alca-Lucent

ShaPhysical

Channels

to

Support

the

LTE

Downlink

(Unicast)eNode-BDL

scheduling

grantHARQ

feedback

forDLCQIreportingAllows

mobile

to

get

timingandfrequency

sync

with

the

cellCarries

basic

systembroadcast

informationCarries

DLtrafficTime

span

of

PDCCHHARQfeedbackfor

ULUEPCFICH

和

PHICH

才能認(rèn)清：

那些CCE是PDCCH的實(shí)際內(nèi)容（PCFICH標(biāo)注那些SYMBOL（RE），

PHICH標(biāo)注那些是重復(fù)內(nèi)容snghai

Bell

2010LTE

Downlink:

Mapof

Logical,

Transport,

Physical

ChannelsLTE

makes

heavy

use

of

shared

channels→

common

control,

paging,

and

part

ofbroadcast

information

carried

on

PDSCHPCCH:

paging

control

channelBCCH:

broadcast

control

channelCCCH:

common

control

channelDCCH:

dedicated

controlchannelDTCH:

dedicated

traffic

channelPCH:

paging

channelBCH:

broadcast

channelDL-SCH:

DL

shared

channels?Alca

-Lucent

Shanghai

Bell

201045

|

PresentationTitle

|

Month

2010Physical

Channels

to

Support

LTE

UplinkeNode-BRandom

access

for

initialaccess

and

UL

timingalignmentUL

scheduling

grantTraffic

andchannel

soundingreference

signalUL

scheduling

request

fortime

synchronized

UEsHARQ

feedbackUEs?Alca

-Lucent

Shanghai

Bell

201046

|

PresentationTitle

|

Month

2010LTE

Uplink:

Mapof

Logical,

Transport,Physical

ChannelsCCCH:

common

control

channelDCCH:

dedicated

controlchannelDTCH:

dedicated

traffic

channelRACH:

random

access

channelUL-SCH:

UL

shared

channelPUSCH:

physical

UL

shared

channelPUCCH:

physical

UL

control

channelPRACH:

physical

random

access

channels?Alca

-Lucent

Shanghai

Bell

201047

|

PresentationTitle

|

Month

2010Mobile

searches

for

P-SCH

location

in

time

and

frequency;gives

OFDM

symbol

boundaries5ms

period

in

time,

center

72

subcarriers

of

system

bandwidth;3

possible

sequences2.

Once

P-SCH

is

acquired,

the

S-SCH

location

is

known,

andS-SCH

is

scrambled

based

on

P-SCH

sequence;

S-SCHindicates

the

10ms

radio

frame

boundaries,

and

allows

themobile

to

obtain

the

group

ID

(168

group

IDs);

P-SCH

+

S-SCH

acquisition

gives

physical

layer

cell

ID

（3×168＝504？）3.

Knowledge

of

the

transmission

timing

and

physical

layercell

ID

allows

the

mobile

to

find

the

position

of

thedownlink

reference

symbols

(6

possible

frequency

shifts)

aswell

as

the

pseudo-random

sequence

usedle4.

Once

the

downlink

reference

signal

is

obtained,

themobican

decode

thebroadcast

channel

(PBCH)5

ms10

ms10

ms1.08

MHzLTE

Downlink:

Basics

of

Cell

SearchThere

are

504

unique

physical

layer

cell

IDs, anized

in

168

groups

of

3s?Alca

-Lucent

Shanghai

Bell

201048

|

PresentationTitle

|

Month

201049

|

Presentation

Title|

Month2010?

Alca-Lucent

Shanghai

Bell2010P-SCH&S-SCH,PBCH

介紹頻域上占用中心位置72個(gè)中心RB（72×15），時(shí)域資源上面3個(gè)TS（的s控制

之內(nèi)）SSS&PSS

位置這里顯示的只是時(shí)域圖，頻域的其實(shí)是72個(gè)中心RB（那個(gè)XLS）s?Alca

-Lucent

Shanghai

Bell

201050

|

PresentationTitle

|

Month

2010LTE下行鏈路：公共參考信號(hào)（RS）結(jié)構(gòu)s?Alca

-Lucent

Shanghai

Bell

201051

|

PresentationTitle

|

Month

201052

|

Presentation

Title|

Month2010s?

Alca-Lucent

Shanghai

Bell2010LTE下行鏈路：用于1,2和4天線端口的公共RS結(jié)構(gòu)1天線──2天線，是頻域上翻倍

（12／2＝6復(fù)用MODULE──3復(fù)用模式）2天線──4天線，只能在時(shí)域

緊接）翻倍

（維持3復(fù)用模式）上行參考信號(hào)：RS解調(diào)用：參考無(wú)線信道模型CQI／FFS相關(guān)的質(zhì)量檢測(cè)信號(hào)，共UE回饋質(zhì)量s?Alca

-Lucent

Shanghai

Bell

201053

|

PresentationTitle|

Month

2010上行參考信號(hào)：RS不同參考信號(hào)在不同的上行信道中位置不同，但作用都是相同的。探測(cè)用參考信號(hào)一般位于最后一個(gè)符號(hào)DMRS：整個(gè)小區(qū)都有？中心72個(gè)頻點(diǎn)（PSS／SSS／PBH…PDCCH)SRS：和UE分配的頻寬

，但是探測(cè)點(diǎn)多很多s?Alca

-Lucent

Shanghai

Bell

201054

|

PresentationTitle|

Month

201055

|

Presentation

Title|

Month2010?

Alca-Lucent

Shanghai

Bell20104LTE

MIMOs業(yè)務(wù)，城市環(huán)境瓶頸：弱覆蓋低速率

掉話

馬賽克中心峰值邊緣低谷56

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010MIMO類型模式1：?jiǎn)翁炀€端口，端口0模式2：發(fā)送分集/TX

DIV

（SFBC空頻塊編碼）模式3：大時(shí)延CDD的空間復(fù)用OLSM模式4：閉環(huán)空間復(fù)用CLSM模式5：多用戶MIMO模式6：?jiǎn)螌娱]環(huán)空間復(fù)用模式7：?jiǎn)翁炀€端口，端口5的波束成形(TDD)模式8：雙天線端口，端口7和8的波束成形移動(dòng)通信

57

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010空間復(fù)用發(fā)射分集波束賦形LTE解決途徑：“多天線技術(shù)與空間利用”58

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010MIMO的三種工作方式空間復(fù)用(Spatial

multiplexing)系統(tǒng)將數(shù)據(jù)分割成多份，分別在發(fā)射端的多根天線上發(fā)射出去，接收端接收到多個(gè)數(shù)據(jù)的混合信號(hào)后，利用不同空間信道間獨(dú)立的特性，區(qū)分出這些并行的數(shù)據(jù)流。從而達(dá)到在相同的頻率資源內(nèi)獲取更高數(shù)據(jù)速率的目的傳輸分集技術(shù)，以空時(shí)編碼(Space

time

coding)為代表在發(fā)射端對(duì)數(shù)據(jù)流進(jìn)行聯(lián)合編碼以減小由于信道和噪聲所導(dǎo)致的符號(hào)錯(cuò)誤率?？諘r(shí)編碼通過(guò)在發(fā)射端增加信號(hào)的冗余度，使信號(hào)在接受端獲得分集增益；波束成形(Beam

forming)系統(tǒng)通過(guò)多根天線產(chǎn)生一個(gè)具有指向性的波束，將信號(hào)能量集中在欲傳輸?shù)姆较?，從而提升信?hào)質(zhì)量，并減少對(duì)其他用戶的干擾MIMO的工作方式59

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010空間復(fù)用技術(shù)空間復(fù)用技術(shù)是在發(fā)射端發(fā)射相互獨(dú)立的信號(hào)，接收端采用干擾抑制的方法進(jìn)行，此時(shí)的空口信道容量隨著天線數(shù)量的增加而增大，從而能夠顯著提高系統(tǒng)的傳輸速率使用空間復(fù)用技術(shù)時(shí)，接收端必須進(jìn)行復(fù)雜的

處理。業(yè)界主要的

算法有：迫零算法（ZF），MMSE算法，最大似然

算法（MLD），分層空時(shí)處理算法（BLAST，bell

labs

layered

space-time）。BLAST算法是Bell

一種有效的空時(shí)處理算法，目前已廣泛應(yīng)用于MIMO系統(tǒng)中。BLAST算法分為D-BLAST算法和V-BLAST算法調(diào)制映射源數(shù)據(jù)接收數(shù)據(jù)b1b2b3b4┅信號(hào)處理b1b3┅b2b4┅b1b3┅b2b4┅b1b3┅b2b4┅b1b3┅b2b4┅b1b3┅b2b4┅空間復(fù)用(Spatial

multiplexing)60

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010空時(shí)編碼技術(shù)空時(shí)編碼通過(guò)在發(fā)射端的聯(lián)合編碼增加信號(hào)的冗余度，從而使信號(hào)在接受端獲得分集增益，但空時(shí)編碼方案不能提高數(shù)據(jù)率空時(shí)編碼主要分為空時(shí)格碼和空時(shí)塊碼空時(shí)格碼在不犧牲系統(tǒng)帶寬的條件下，能使系統(tǒng)同時(shí)獲得分集增益和編碼增益。但是當(dāng)天線個(gè)數(shù)一定時(shí)，空時(shí)格碼的復(fù)雜度隨著分集程度和發(fā)射速率的增加呈指數(shù)增加；為減小的復(fù)雜度，Alamouti提出了空時(shí)塊碼(STBC)的概念，STBC使得接受端只需要采用簡(jiǎn)單的線形處理進(jìn)行，從而降低了的復(fù)雜度?？諘r(shí)編S

(k)C1

(k)Cn

(k)S’

(k)源數(shù)據(jù)接收數(shù)據(jù)空時(shí)編碼(Space

time

coding)61

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010波束賦形技術(shù)波束賦形技術(shù)又稱為智能天線（Smart

antenna），通過(guò)對(duì)多根天線輸出信號(hào)的相關(guān)性進(jìn)行相位，使信號(hào)在某個(gè)方向形成同相疊加（constructive

interference），在其他方向形成相位抵消（destructive

interference），從而實(shí)現(xiàn)信號(hào)的增益系統(tǒng)發(fā)射端能夠獲取信道狀態(tài)信息時(shí)（例如TDD系統(tǒng)），系統(tǒng)會(huì)根據(jù)信道狀態(tài)調(diào)整每根天線發(fā)射信號(hào)的相位（數(shù)據(jù)相同），以保證在目標(biāo)方向達(dá)到最大的增益；當(dāng)系統(tǒng)發(fā)射端不知道信道狀態(tài)

時(shí)，可以采用隨機(jī)波束成形方法實(shí)現(xiàn)多用戶分集波束賦形 (Beam

forming)62

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010CSI信道狀態(tài)＝預(yù)編碼矩陣(RI,PMI),MCS(CQI)M

TxN

RxVHHRISelect#codewordsModulation

+

codingPMICQIModulation

+

codingUHDemod

+decodedemod

+decodeprecodingLayermappingClosed-Loop

SMOpen-Loop

SMCQIseparate

CQI

for

each

codeword

fed

backone

value

fed

back

applicable

over

all

layersPMIPMI

feedback

from

UE

based

on

instantaneous

channelstateno

feedback

fromUE,

fixed

precoding

at

eNB

withlarge

delay

CDD

to

improverobustnessRIbased

on

SINR

and

instantaneous

channel

matrix

rankRI=1

corresponds

toclosed

loop

TxDiv

(C

)typically

based

only

on

SINRRI=1

corresponds

to

open

loopTxDiv

(SFBC)63

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

2010LTE三種工作方式的應(yīng)用場(chǎng)景模型應(yīng)用場(chǎng)景以上為MIMO的集中模式在ENODEB設(shè)計(jì)中的建議場(chǎng)景模型，按照切換的邊界件來(lái)分，從離城市中心到郊區(qū)，分別是

CL-MIMO（TM4），OL-MIMO（TM3）,

BeamForming（TM7）,

TxD（TM2）按照TM2,TM3,TM4,TM7來(lái)配置，每種模式均可切換至TxD64

|

PresentationTitle|

Month

2010s?Alca

-Lucent

Shanghai

Bell

201065

|

Presentation

Title|

Month2010?

Alca-Lucent

Shanghai

Bell2010【R8→R9→R10】：s3GPP

RAN2006Q1

Q2

Q3

Q42007Q1

Q2

Q3

Q42008Q1

Q2

Q3

Q42009Q1

Q2

Q3

Q42010Q1

Q2

Q3

Q42011Q1

Q2

Q3

Q42012Q1

Q2

Q3

Q4Rel-8Rel-9Rel-10Rel-11Rel-8LTERel-9Enhanced

Dual

LayerTransmission

for

LTEPositioning

support

for

LTESONHeNBeMBMSIMSEmergency

CallsPWSCodec

Rate

AdaptationNew

frequency

bandsRel-10Carrier

AggregationEnhanced

DL

MIMOUL

MIMOeICICRelaySON

enhancementsHNB

and

HeNB

mobilityenhancementsMinimization

of

Drive

Testsfor

E-UTRAN

and

UTRANNew

frequency

bandsRel-11LTE

CAenhancementsFeICICCoMPeMDTFeMBMSInterference

avoidance

forin-device

coexistenceMTCLTE

RAN

enhancements

forDiverse

D