3gpp_LTE _final

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LTE standards

Status for this work in 3GPP andwhat next for the Future

Francois COURAU

3GPP TSG RAN Chairman



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• LTE STANDARDS1 Status of the work within 3GPP TSG RAN

2 Detailed information

3 Introduction to LTE advanced

4 Timescale for LTE Advanced

5 Conclusion



3

Status of the work in 3GPP



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TSG RAN

RAN WG1

Layer 1

RAN WG2

Layer 2/3

RAN WG3

Layer 2/3

RAN WG4

Layer 1 P/R

RAN WG5

UE Tests

3GPP TSG RAN Organization



5

General Introduction to the work in 3GPP



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• Work in 3GPP is organized around theconcept of release which can be defined

as a complete set of functionalities for afull cellular network allowing new set ofservices to be deployed by operators

• After completing a long evolution of the

Wideband CDMA radio technology, 3GPPdecided to work on a new concept of radiotechnology to allow further evolutionhaving in mind a long term evolution. LTE

was born. But this does not stopcompletely parallel evolution of theWCDMA



Detailed information on the development of

LTE



eNB

MME / S-GW MME / S-GW

eNB

eNB

S 1

S 1

S 1

S 1

X2

X 2X

2

E-UTRAN

LTE Access Network Architecture



LTE Standard

• Layer 1 specification – It can be separated in 2 parts

• First part resulting from the work in RAN WG1dealing with the description of the physical layer isnow subject to the correction phase since last term.

Functionalities described are complete and no majorchanges are expected. Set of specificationcontained in 36.2xx series

• Second part mainly concerning the Requirement andthe Performances still need to be completed but thisis already considered as complete at 60% level. It isanticipated that this should be completed inDecember 2008. This work is mainly in the hand ofWG4. This is a key activity as it is the premises forthe tests activities. Set of specification contained in36.1xx series



• Layer 2 and Layer 3 (Signaling over

Interfaces) – Over the radio interface:

• Mainly under responsibility of RAN WG2

• It covers all aspects related to the MAC, RLC and

RRC• Set of specification contained in 36.3xx series

– In between the Core and the Access Network

• Covers all the aspects from physical layer of the

interfaces S1, X1 and X2

• Set of specification contained in 36.4xx series



• User Equipment Testing activities

– WG5 is in charge of defining the testspecification for the User Equipment designed

by 3GPP. This covers the two following

aspects:

•

Tests of the User Equipment part covering the RadioInterface (Access Stratum)

• Tests of the User Equipment part covering the

User/Core Network interface (Non Access Stratum)

• Work has already started. Discussion on the priority

of test development between TSG RAN and theWorking Group started in June and are still under

way



LTE Standards

TS TitleCompletion

level at

RAN#38

Functionalfreezing

date

36.201LTE Physical Layer –

General Description

Completed Dec. 07

36.211Physical channels and

modulationCompleted Dec. 07

36.212Multiplexing and

channel coding

Completed Dec. 07

36.213Physical layer

procedureCompleted Dec. 07

36.214Physical layer

measurements

Completed Dec. 07



TS TitleCompl.

level at

RAN#41

Functionalfreezing date

36.302Services provided by

the physical layer95% Mar. 08

36.304UE procedures in Idlemode

95% Mar. 08

36.306UE Radio Access

capabilities95% Jun. 08

36.321 MAC 95% Jun. 08

36.322 RLC 95% Jun. 08

36.323 PDCP 95% Dec. 07

36.331 RRC 95% MAR. 09 for ASN.1



TS TitleCompl. level

at RAN#40

Functional

freezingdate

36.401 EUTRAN Architecture Description 95% Mar. 08

36.410 S1 General Aspects and Principles 95% Mar. 08

36.411 S1 Layer 1 95% Mar. 08

36.412 S1 Signaling Transport 95% Mar. 08

36.413 S1 Protocol Specification 95%Mar. 08

Sep. 08 for

ASN.1

36.414 S1 Data Transport 95% Mar. 08

36.420 X2 General Aspects and Principles 95% Mar. 08

36.421 X2 Layer 1 95% Mar. 0836.422 X2 Signaling Transport 95% Mar. 08

36.423 X2 Protocol Specification 95%Mar. 08

March 09 for

ASN.1

36.424 X2 Data Transport 95% Mar. 08



TS TitleCompl.

level at

RAN#41

Function

freezing

36.101

UE radio

transmission

and reception

Core

requirements 90%Mar. 08

Performance

requirements 60%

36.104BS radiotransmission

and reception

Core

requirements

95%

Mar. 08Performance

requirements 70%

36.133

Requirements

for support of

radio resourcemanagement

Core

requirements 90%Sep.

08Performance

requirements 60%

36.141

BS

conformance

testing

Core

requirements 80% Sept.

08Performance

requirements 60%



TS Title

Completio

n level atRAN#38

Date forApproval

Functiona

l freezingdate

36.508Common test

environments for UE

conformance testing10% Dec. 08 TBD

36.521

UE conformancespecification Radio

transmission and

reception (RF)

20% Sep. 08 TBD

36.523UE conformance

specification (Sig) 15%Dec.

08* TBD

This date was set considering work plan for AS(LTE) signaling only.

Work plan that includes NAS signaling still needs to be confirmed

in the RAN5 work plan (awaiting progress in CT1 mainly).



Introduction to LTE advanced



LTE Advanced

• ITU-R is currently investigating 4G and hassolicited all organization for proposingtechnology as candidate for radio interface

• 3GPP had recently organized two workshops toexamine this request

• At the last plenary it has been decided to answerto ITU-R with an evolution of the radio technologyalready proposed in as an IMT 2000 technology:LTE

• Here follows the foreseen evolutions alreadyunder study in 3GPP



• Main Characteristics for LTE Advance

– The objective of Further Advancements for E-

UTRA is as follows:

• Define a framework for further advancements of E-

UTRA and E-UTRAN (to be referred to as Advanced

E-UTRA and Advanced EUTRAN considering:• The time schedule of ITU-R

• That the work on Advanced E-UTRA and Advanced

E-UTRAN must not introduce any delay to the

completion of the Release 8 specification of E-UTRA

and E-UTRAN

• That the general enhancements of specifications for

Release 8 E-UTRA and E-UTRAN are maintained and

progressed in a focused and efficient manner.



• Define requirements for Advanced E-UTRA and Advanced E-UTRAN based on the ITU-R requirements for IMT-Advanced as

well as 3GPP operators own requirements for advancing Release8 E-UTRA AND E-UTRAN considering:

• E-UTRA radio technology and architecture improvements

• Support for all radio modes of operation

• Interworking with legacy RATs (scenarios and performancerequirements)

• Backward compatibility of Advanced E-UTRA and Advanced E-

UTRAN with Release 8 E-UTRA and E-UTRAN i.e. – an Release 8 E-UTRA terminal can work in an Advanced E-UTRAN,

– an Advanced E-UTRA terminal can work in an Release 8 E-UTRAN and

– non-backward compatible elements could be considered based onRAN decision

• Newly identified frequency bands and existing frequency bands,and their advantages and limitations, in particular, theconsideration of the WRC-07 conclusions, to ensure that

Advanced E-UTRA can accommodate radio channel bandwidthscommensurate with the availability in parts of the world ofwideband channels in the spectrum allocations (above 20 MHz)and at the same time being mindful on the need to accommodatethose parts of the world where the spectrum allocations will nothave availability of wideband channels



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• Identify potential solutions, technologies for the Advanced

E-UTRA and Advanced E-UTRAN. The study areas include:• Physical layer

• Radio interface layer 2 and RRC

• E-UTRAN architecture

• RF, including Aspects of wider channel bandwidth than 20

MHz• Advanced system concepts

• To develop documents that will serve as a basis for the

documentation to be submitted to ITU-R to provide the

3GPP proposals for IMT-Advanced:

•

An “Early Proposal” submission that would be sent to ITU-R, to be agreed at RAN #41 (9-12 September 2008), for

submission to WP 5D #3 (8-15 October 2008).



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– A “Complete Technology” submission that

would be sent to ITU-R, to be agreed at RAN

#44 (26-29 May 2009), for submission to WP 5D

#5 (planned for 10-17 June 2009).

– A “Final” submission to incorporate updates,

additional specific details or feature additions,and the required self-evaluation that would be

sent to ITU-R, to be agreed at RAN #45 (22-25

September 2009), for submission to WP 5D #6

(planned for 13-20 Oct 2009).



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2009 2010 20112007 2008

LTE CR phase

#38 #39 #40 #41 #42 #43 #44 #45 #46 #47 #48 #49

#1 #2 #3 #4 #5 #6 #7 #8 #9

WS 2nd WS

Proposals

Evaluation

Consensus

Specification

#10

Work ItemStudy Item

#11 #12

RAN#41 9-12 September 2008 in Kobe, JP

• Have a verification that the 3GPP requirements are equal or

exceeding the ITU-R requirements

• Update 3GPP LTE-Advanced requirements according to theverification results if needed

• Make an early submission of the 3GPP concept to the ITU-R

IMT-Advanced process

Circular letter

amendment with

requirements and eval.

methodology from WP 5D

#2



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Conclus ion

• As can be seen from the previous slide

3GPP is fully busy for a certain number of

years with covering at the same time: – Evolution of WCDMA

– Completion of the development of LTE

– Definition of LTE advance

– LTE is part of IMT advance process in ITU-Rand 3GPP will provide the SDO with the

evaluation of the technology



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Thank you!

Any Question?

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