3GPP LTE & 3GPP2 LTE
STANDARDIZATION
KRnet 2006, June 27-28, 2006
Dr. LEE, HyeonWoo
SAMSUNG ELECTRONICS
woojaa@samsung.com
1
CONTENTS
Mobile Communication Roadmap
3GPP Long Term Evolution
3GPP2 Long Term Evolution
IMT-Advanced
KRnet 2006
2/26
Mobile Communication Roadmap
Mobility
1985
1995
2000
2005
HSPA
1xEV-DO
GSM
cdmaOne
High
1G
Middle
2G
2010
3G
3G+
AMPS
TACS
LTE
Deployment
of LTE
WCDMA
cdma2000
2015
E3G
Time
IMT-Advanced
4G
BWA
802.16/WiMAX
WLAN
Low
Data rate
802.11/WiFi
<10kbps
KRnet 2006
<200kbps
300kbps-10Mbps
<100Mbps
100M-1Gbps
3/26
View toward 4G/IMT-Adv
High Mobility
B3G
DMB
4G
4G
Mobile
2G
2G
GSM
IS-95
3G
3G
EV-DO
GPRS
HSDPA
Revolution
CDMA1x
IS-136
WCDMA
WiBro
Nomadic
IEEE802.16
Bluetooth
Evolution
IEEE802.16e
Wi-Fi
IEEE802.11
Evolution
Wi-Max
UWB
W-PAN
Low Mobility
2005
KRnet 2006
2010+
Time
4/26
3GPP Roadmap
ƒ UTRA-UTRAN Long Term Evolution Study Item (TSG-RAN): Air Interface
ƒ System Architecture Evolution Study Item (TSG-SA): Network Architecture
UTRAN Long-Term
WLAN I/W
Standard
Workshop
PoC
Release
99/4
2000
IMS
MBMS
HSDPA
EDCH
Release 5
2001
2002
2003
(2004.11)
Release 6
2004
LTE & SAE specifications
- Improved packet service
- Improved coverage
- Reduced latency
Evolution (LTE)
2005
Release 7
2006
2007
2008
2009
2010
Release 99/4 system
Commercial
Release 5/6 system
Evolution system
KRnet 2006
5/26
3GPP Long Term Evolution (LTE)
and System Architecture Evolution (SAE)
Evolution target
ƒ
ƒ
ƒ
ƒ
ƒ
Max. data rate: 100 Mbps (downlink), 50 Mbps (uplink) @ 20 MHz
Improved system throughput
Reduced user plane latency: less than 5ms (btw RAN edge and Mobile)
Reduced control plane latency: less than 100ms (from IDLE to ACTIVE state)
Support of scalable system bandwidth: 1.25/1.6/2.5/5/10/15/20 MHz
LTE/SAE Schedule
Study Item
RAN Architecture,
Multiple access scheme Decision
Requirement Decision
12
3
Work Item
2005
6
9
RAN-CN functional split Decision
Feasibility
Study: LTE
KRnet 2006
12
Study Item TR Approval
Stage 2 Completion: LTE
3
Channel Structure,
Mobility details Decision
Feasibility
Study: SAE
6
2006
9
12
3
2007
6
Study Item TR Approval
Stage 2 Completion: SAE
Core
Specification
6/26
3GPP LTE/SAE related working group
TSG RAN WG and TSG SA WG2 are the main groups.
RAN: Radio Access Network
SA: Service & Architecture
CT: Core Network and Terminal
GERAN: GSM&EDGE RAN
PCG
TSG RAN
TSG SA
TSG CT
TSG GERAN
RAN WG1
Physical
SA WG1
Service & Req.
CT WG1
NAS
GERAN WG1
RAN WG2
Layer 2/3
SA WG2
Architecture
CT WG2
GERAN WG2
RAN WG3
Iu Interface
SA WG3
Security
CT WG3
GERAN WG3
RAN WG4
Performance
SA WG4
Codec
CT WG4
Gn Interface
RAN WG5
Test ()
SA WG5
I/W
CT WG5
KRnet 2006
7/26
LTE general
LTE focus is on
ƒ Enhancement of the Universal Terrestrial Radio Access (UTRA)
ƒ Optimisation of the UTRAN architecture
LTE Background
LTE Targets
Expectations of additional
3G spectrum allocations
Demand for higher data
rates
Greater flexibility in
frequency allocations
Continued cost reduction
KRnet 2006
LTE
Significantly increased peak data rates
Increased cell edge bit rates
Improved spectrum efficiency
Improved latency
Scaleable bandwidth
Reduced CAPEX and OPEX
Acceptable system and terminal
complexity, cost and power
consumption
Compatibility with earlier releases and
with other systems
Optimised for low mobile speed but also
supporting high mobile speed
8/26
LTE current working assumption
Downlink based on OFDMA
ƒ OFDMA offers improved spectral efficiency,
capacity, etc
Uplink based on SC-FDMA (single carrier)
ƒ SC-FDMA is technically similar to OFDMA but is
better suited for uplink from hand-held devices
- (more considerations on battery power)
For both FDD and TDD modes
Macro-diversity (soft handover) is not used.
KRnet 2006
9/26
LTE performance (1/2)
Downlink
Rel’6 (HSDPA)
LTE
LTE target / Fulfillment
Peak bitrate (Mbps)
14.4
144
100Mbits target / Fulfilled
Spectral efficiency
(bps/Hz/s)
0.75
1.84
3-4 times of HSDPA / 2.5
Cell edge user
throughput (bps/Hz/s)
0.006
0.0148
2-3 times of HSDPA / 2.5
Rel’6 (HSUPA)
LTE
LTE target / Fulfillment
Peak bitrate (Mbps)
5.7
57
50Mbits target / Fulfilled
Spectral efficiency
(bps/Hz/s)
0.26
0.67
2-3 times of HSUPA / 2.6
Cell edge user
throughput (bps/Hz/s)
0.006
0.015
2-3 times of HSUPA / 2.5
Uplink
KRnet 2006
10/26
LTE performance (2/2)
Latency
ƒ Control-plane
Less than 50msec
- Significant reductions in
Dormant
(Cell_PCH)
Active
(Cell_DCH)
transition times (~100ms)
Less than 100msec
from idle or dormant
Camped-state
(idle)
states to active state
ƒ User-plane
- Radio access network latency below less than 5 ms in unloaded
condition (i.e. single user with single data stream) for small IP
packet.
e-Node B
aGW
IP Network
UE
Latency : ~5ms
KRnet 2006
11/26
Major decisions made in RAN WGs
OFDMA for downlink
SC-FDMA for uplink
IP Network
0.5ms TTI
375 KHz resource block
2 node architecture (aGW & eNB)
S1 - flex
Data Forwarding
Functions in eNB: ARQ
Functions in aGW:
Header compression / Ciphering
KRnet 2006
12/26
SAE (System Architecture Evolution)
Objectives
ƒ New core network architecture to support the highthoughput/low latency LTE access system.
- Symplified network architecture
ƒ All IP network
- All services are via PS domain only, No CS domain
ƒ Support mobility between multiple heterogeneous access system
- 2G/3G, LTE, non 3GPP access systems (e.g. WLAN, WiMAX)
KRnet 2006
13/26
Baseline of SAE architecture
GERAN
Gb
Iu
SGSN
GPRS Core
P CRF
UTRAN
Rx+
S7
S3
S4
HS S
S5a
Evolved RAN
S1
MME
UPE
S5b
3GPP
Anchor
S6
SAE
Anchor
SGi
IASA
Evolved Packet Core
S2
non 3GPP
IP Access
Op.
IP
Serv.
(IMS,
PSS,
etc…)
S2
WLAN
3GPP IP Access
* Color coding: red indicates new functional element / interface
MME – Mobility Management Entity
UPE – User Plane Entity
3GPP Anchor – Mobility anchor between 2G/3G and LTE access systems (based on GTP)
From TR 23.882
SAE Anchor – Mobility anchor between 3GPP access systems (2G/3G/LTE) and
non-3GPP access systems (e.g. WLAN, WiMAX)
KRnet 2006
14/26
LTE/SAE Technical Reports (for info.)
SAE
LTE
SA WG1
SA WG2
TS22.xxx V0.0.0
TR23.882 V1.1.0
Requirements for
evolution of the
3GPP system
architecture
(S1-060602)
Editor: T-mobile
System Architecture
Evolution
(SP-060152)
Editor: Vodafone
TR25.913 V7.3.0: Requirements for EUTRA and UTRAN
TR25.912 V0.1.3: Feasibility Study for EUTRA and EUTRAN
Outcome
RAN WG1
RAN WG2
RAN WG3
RAN WG4
TR25.814 V1.2.3
TR25.813 V0.8.4
TR R3.018 V0.4.0
Physical layer
aspects for EUTRA
(RP-060178)
Editor: NTT DoCoMo
EUTRA and EUTRAN
Radio interface
protocol aspects
(RP-060176)
Editor: Nokia, LG, NEC,
Motorola, Samsung
EUTRA and EUTRAN
Radio Access
Architecture and
Interfaces
Editor: Vodafone
SI TR: NTT DoCoMo
Base Station: Ericsson
Terminal: Motorola
RRM: Nokia
RF System Scenarios:
Siemens
WG specific TRs
KRnet 2006
15/26
IMS is Access Independent (in Theory)
LTE
HSPA+
HSPA
TDSCDMA
IMS
3GPP
WCDMA
Defined
Radio
EDGE
Accesses
GPRS
For Packet
KRnet 2006
Non-3GPP
Defined
Radio
802.16e Accesses
802.x
3GPP2
MDN
802.11
DSL
Cable
Fixed
Accesses
16/26
Organizations using IMS
CSI
VCC
Presence
Cellular Access to IMS
GLMS
PoC
Messaging
IP
Multimedia
Telephony
Multimedia
Telephony
Multimedia
Telephony
Wireline Access to IMS
WLAN Access to IMS
Mobile
KRnet 2006
Residential
17/26
On going Work for CS to IMS Transition
Objective: Migration from CS voice services to
PS IMS multimedia services
CSI (Combinational Services)
ƒ Complement CS services with IMS services
VCC (Voice Call Continuity)
ƒ Voice handovers between IMS and CS bearers
Multimedia Service Definition
ƒ Robust interoperable multimedia telephony
Improving IMS quality
ƒ Faster session setup, improved performance, better voice quality
KRnet 2006
18/26
3GPP2 Phase 2 (LTE) Timeline
Phase 2 (Rev.C)
Frame
FDD
Schedule Selectio
n
Baseline
200
6
June
TDD
Submit Joint
Framewor
k
Publicatio
n
2007
Octobe
r
Approval
process as
Framework
Baseline
Decemb
er
Publication
- Both FDD and TDD pursue same publication date
KRnet 2006
19/26
Framework proposals for 3GPP2 Phase 2
1. Lucent-Nortel-Samsung Proposal
2. Qualcomm Proposal
3. Motorola Proposal
4. HRZC(Huawei, RITT, ZTE, China Unicom) Joint Proposal
5. LG Proposal
Characteristics
Strictly
Backward
Compatible
(SBC)
Loosely
Backward
Compatible
(LBC)
KRnet 2006
Co-existing Legacy AT and new AT
FL: OFDMA and CDMA multiplexed
in time slot
RL: CDMA or Hybrid OFDM-CDMA
Legacy AT and new AT in separate
carrier
Maximize reuse of existing upper
layer
FL: OFDM / RL: OFDM-CDMA
Pros & Cons
- Smooth Migration from legacy
system
- Performance loss due to
backward compatibility
- Optimized for broadband
system
- Minimum backward
compatibility
20/26
LNS vs. HRZC Framework comparison
Item
LNS
(Lucent-Nortel-Samsung)
HRZC
(Huawei-RITT-ZTE-China Unicom)
Remarks
Multiple Access
OFDMA (with Precoded CDMA)
OFDMA
Key issue
Supportable
Bandwidth
1.25, 2.5, 5, 10, 20 MHz
1.25, 2.5, 5, 10, 20 MHz
Resource Allocation
Unit
DRCH/LRCH
And Multiplexing
DRCH/LRCH
And Multiplexing
Data Control Channel
(MAP)
Grouped
Unicast
HARQ
FL: Synch HARQ
RL: Synch HARQ
FL: Asynch HARQ
RL: Synch HARQ
Coding
Turbo Coding
Turbo Coding
Open Loop: STBC, Cyclic shift Diversity
Open Loop: STBC, open loop SDMA
Closed Loop: SCW/MCW/Beam forming
Closed Loop: SCW/MCW/Beam forming
Feedback: Code book index
Feedback: Precoder vector/matrix
Power Control
Yes
Yes
Resource Management
Support persistent assignment
Support persistent assignment
MIMO
KRnet 2006
Key issue
21/26
Migration from 3G LTE to 4G (IMT-Adv.)
‹ Mid-term 3G RAN evolution:
HSDPA, uplink enhancement, MBMS, etc.
‹ Evolved UTRA and UTRAN (Super 3G)
• Super 3G system will provide support for full IP
capabilities
• Smooth introduction of future 4G system
Now
3G
3G Long-term
evolution
3G
Super 3G
3G
Super 3G
4G
Super 3G
4G
Source: DoCoMo
KRnet 2006
22/26
3G Evol vs. IMT-Adv
3G RAN Evolution
z“Enhanced IMT-2000”
zExisting 3G Spectrum and
additional band (e.g 2.6 GHz)
z 14Mbps Æ 30-100Mbps
“up to approximately 30 Mbit/s by
around the year 2005” ITU-R M.1645
IMT-Adv
ITU-R M.1645
SPECTRUM
BIT RATE
z“New Mobile Access”
zNew Spectrum for 4G with
Broader band e.g. 100MHz
(to be identified)
z100Mbps-1Gbps
¾Mid-term Evolution
—HSDPA, HSUPA, etc.
3G Evolution
¾Long-term Evolution
—Competitive technology
even in 4G era
4G
Launch Mid-term Long-term
Evolution Evolution
Source: DoCoMo
1G
1980s
KRnet 2006
2G
1990s
2000s
2010s
2020s
23/26
Network configuration in IMT-Adv. era
Application Server
OPEN API
All IP N/W
Access
Gateway
Soft Switch
Wireline
Nomadic
Mobile
Hot Spot
Sensor N/W
Ad-hoc N/W
3G/ WiBro/4G
KRnet 2006
MANet
WLAN/ Wi-MAX
24/26
Strategy toward Global 4G Standard
• Korea: TTA, Asia : CJK/APT, Global: WWRF, OMA/IEEE, ITU
National
Global
Regional
•단일표준 추진
NGMC
TTA
CJK
IT mtg.
APT/AWF
ITU-R/T
ARIB-mITF
CCSA-Future
WWRF
OMA
Strategic Alliance Win-Win
KRnet 2006
25/26
Closing Remarks
3G LTE is one of strong migration paths
toward IMT-Adv.
Smooth migration from 3G LTE and IMT-Adv. Is
key for success in market
However, other migration paths are also
important for consideration.
We will continue to lead technology and
standardization in 3G LTE and IMT-Adv.
KRnet 2006
26/26