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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
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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
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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
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Detailed information on the development of
LTE
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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
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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
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• 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
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• 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
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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
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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
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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
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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%
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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).
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Introduction to LTE advanced
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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
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• 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.
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• 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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