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Evolution of 3GPP LTE-Advanced Standard toward 5G
August 09, 2013 | By LG
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빅토리아 2014-09-14 18:04:50

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Transcript
Evolution of 3GPP LTE-Advanced Standard
toward 5G
KRNet
2013. 6. 24.
LG Electronics
Byoung-Hoon Kim
(bh.kim@lge.com)2
802.20
UMB* 1G 2G
High
(~350Km/h)
Medium
(Vehicular)
Low
(Nomadic)
Peak Data Rate 14.4 Kbps 144 Kbps 384 Kbps ~ 50 Mbps ~100 Mbps
CDMA
GSM
AMPS
W-CDMA
HSDPA/HSUPA
CDMA2000/EV-DV/DO
1995 2000 2005 2010
802.16e
802.11a/b
802.16a/d
Mobility
3G
802.11n
IMT-Advanced
Standard
~1 Gbps
3G Ev.
WLAN
802.11ac/ad
We are here
802.16m ?
LTE*
Rel’8/9
LTE-A
Rel’10/11
Communication Standards Evolution3GPP LTE Evolution
OFDMA: Orthogonal Frequency Division Multiple Access, MIMO: Multiple Input Multiple Output, EPC: Enhanced Packet Core, M2M: Machine-to-Machine,
D2D: Device-to-Device, SON: Self Organizing Network, FeICIC: Futher Enhanced Inter-Cell Interference Coordination, MDT: Minimization of Driving Test,
EPDCCH: Enhanced Physical Downlink Control Channel, CoMP: Coordinated Multi-Point Operation, eIMTA: Enhanced Interference Mitigation & Traffic Adaptation
3GPP
LTE
2011 2012 2013
LTE-A Rel.10
LTE-A Rel.11
LTE-A Rel.12
2014
OFDMA
3GPP Workshop for Rel.12 & Onward
(Ljubljana, 6/11-12, 43 company presentations)
Rel.13
2008 2009 2010
LTE Rel.9
LTE Rel.8
LTE-A Study
3GPP Workshop for LTE-Advanced
MIMO Dual Layer Beamforming MIMO Enhancements
EPC
Location Based Service
MBMS
Femto Cell
Carrier Aggregation
SON
Relay
MDT
CoMP
D S U U U D S U U U
D S U D D D S U D D
eIMTA
M2M Optimization
New Carrier Type
Mobile Relay
Small Cell
Amorphous RAN
D2D
3D MIMO
Heterogeneous
Interworking
FeICIC
EPDCCH
Data
ePDCCH PDCCH
MME GW
3 4
User Experience Expectation
Intelligent Agent Free & Green
Transportation
Mobile device as
intelligent agent
Knowledge building
Service brokering
Context reasoning
Health
Shopping Restaurant
Lawyer
Traffic
Context gathering
Application Server
Cloud network
 Ambient sensing/adaptation
 Throughput enhancement
 Proximity awareness
 Cost per bit reduction for
end user satisfaction
 Energy saving
UHD Everywhere
 Peak rate enhancement
 Balanced QoS
 Ubiquitous connectivity
Macro
WiFi
More than FHD device
UHD video
Cooperation
Pico/Femto
Offloading3GPP LTE-Advanced Rel.12 & Onward Requirement
5
Source: Morgan Stanley
Source: Cisco
UHD
3D Video
Improved Channel Capacity
to Cope with Traffic Explosion
Improved Data Rates for
Enhanced User Experiences Cost Per Bit Reduction
Improved Backhaul Performance Energy Saving Device & Application Diversification3GPP LTE-Advanced Rel.12 & Onward Core Technology
6
Small Cell / Amorphous RAN
eIMTA
3D MIMO
Enhanced Carrier Aggregation
D2D
LTE/WLAN Radio Interworking
Enhanced Wireless Backhaul New Carrier Type MTC Enhancement
LTE
Wi-Fi
coordination
FDD: Frequency Division Duplexing, TDD: Time Division Duplexing, D2D: Device-to-Device, Het-Net: Heterogeneous Network, MTC Machine Type Communication (M2M)
Reference
Signal
High Frequency

FDD + TDD + Unlicensed Focus Areas in
LTE-Advanced Rel.12~
1. Small Cell Enhancement
2. 3D MIMO
3. Device-to-Device Communication
4. Enhanced Interference Mitigation and Traffic Adaptation
5. New Carrier Type
6. LTE/WLAN Radio Interworking
7. Other EnhancementsSCE: Small Cell Enhancement
Small Cell
Enhancement
 Enhancement of cellular network for indoor and outdoor scenarios using
low power nodes
 To cope with mobile traffic explosion
 With or without macro cell coverage
 Dense or sparse deployment
 Different or same frequency for macro and small cell layers
8 SCE : Use Cases
9
 Small cells cluster scenarios
Common solution for scenario #1, #2, #3
Small cell
Macro cell
Small cell
Note: Overlapping
macro may be
present or not
Coordination
Coordination
F1
F1 or F2 Cluster
Common design for scenarios #1, #2a, #2b, and #3
- Data/control splitting
- Data throughput boosting
- Offloading
- Extended coverage
Source: 3GPP TSG R1-130748SCE : Technical Challenges [1]
 Utilization of Higher frequency bands (3GHz or higher) with wider bandwidth
Dual Connectivity
10
 Relaxation of backhaul requirements
 Function (C/U) splitting between Macro and small cells
High Frequency BandSCE : Technical Challenges [2]
 Cooperation of dense network of distributed transmission points
 UE-centric virtual cells
 Enhanced mobility support (to minimize the handover frequency)
 Radio Interface based synchronization (network listening, UE assistance)
Interference
Management
&
Discovery
11
 Enhanced inter-cell interference coordination & measurement
 Cell on/off, enhanced power control, load balancing
 Support of small cell discovery
Amorphous Cell
Improved
Spectral Efficiency
 Higher order modulation (256 QAM for cellular, EVM & Rx impairment issue)
 Control Signaling Overhead Reduction: Multi-subframe scheduling, cross-subframe
scheduling, control-less subframes
Pico
Macro
UE
f 1
f 2
Discovery signal only3D MIMO: 3 Dimensional Beamforming
3D MIMO
 Advent of Active Antenna System (AAS)
 Each antenna element combined with active transceiver (including PA)
 Massive MIMO antenna elements
 3D beamforming and single/multi-user MIMO based on 2D AAS
12
Coverage for lower vertical
angle
Coverage for higher vertical
angle
Coverage for ground level
Antenna gain
One sub-array
Whole antenna
Antenna attenuation
Higher signal level in
sub-array
Lower signal level in
sub-array
Antenna gain
One sub-array
Whole antenna
Antenna attenuation
Higher signal level in
sub-array
Lower signal level in
sub-array13
3D MIMO: Use Case
 UE specific vertical/horizontal beamforming
 Dynamic TX/RX beamforming
 Carrier/RAT specific tilting
 Vertical/horizontal sectorization
Source: www.nokiasiemensnetworks.com3D MIMO: Technical Challenges
3D Channel Model
 Modeling a 2D array structure at eNB
 3D channel modeling including multipath fading in azimuth and elevation
 Elevation angular spread of departure & arrival (ESD, ESA)
 Mean elevation angle of departure & arrival (MED, MEA)
 Location of UEs in horizontal and vertical domains
 Mobility of UEs in horizontal and vertical domains.
eNB & UE
Design
14
 Decision on the number of antenna units to be supported
 Issues to be considered
 Means to ensure the coverage of common control channels
 RRM measurements and procedures with large number of antenna ports
 Cell edge improvement and interference reduction
 Overheads for reference signals and feedback
 UE complexity (especially for UE-side massive MIMO antennas)
 Impact on legacy UEsD2D: Device-to-Device Communication
D2D
15
 UE directly discovers and communicates with peer UE over-the-air
 Energy-efficient discovery of peer UEs
 Spatial reuse of time/frequency resources
 Latency reduction
 Proximity-based services
SGW/PGW
eNB eNB
UE1 UE2
SGW/PGW
eNB eNB
UE1 UE2
Data path of the evolved packet service (in 3GPP)D2D: Use Cases [1]
Public
Safety
 Public safety message delivery by
UE relaying and information flooding
Commercial
Network
Enhancement
 Out of network coverage
 Emergency when network is destroyed
 Social network
Discover friends in the vicinity
Find people with common interest
 Mobile advertisement
Neighborhood stores
Individual offer
Source: Qualcomm
16
(destroyed)D2D: Use Cases [2]
 D2D scenarios:
– In network coverage
– Out of network coverage
– Partial network coverage
 D2D communication type:
– Unicast
– Groupcast
– Broadcast
– UE relay
17
3GPP D2D
Initial Focus
Within network
coverage
Outside network
coverage
Discovery Non public safety & public
safety requirements
Public safety only
Direct
Communication
At least public safety
requirements
Public safety onlyD2D: Technical Challenges
UE
 Discovery of UEs
 Identification of a certain UE in its proximity in a battery efficient way
 Synchronization and measurement of channels from UEs
 Receive over UL resource (or transmit over DL resource)
 D2D Tx timing relative to UL/DL cellular channel Tx/Rx timing
 Maintenance of dual connectivity
 One link with eNB, the other with UE(s)
 Mitigation of in-band emission
 Group communication, relaying, security, privacy, etc.
eNB
18
 Control of D2D links
 Scheduling of individual D2D transmission and high-level control
 Coordination of interference
 Maximization of spatial reuse without causing serious interference
 Single or multiple-operator scenarios
 Charging, accounting, security, privacy, etc.
 WLAN incorporationeIMTA: Enhanced Interference Mitigation & Traffic Adaptation
eIMTA
19
 Dynamic and flexible resource configuration for TDD
in consideration of traffic load
 eNB transmits DL data in UL resource when DL traffic is heavy.
 Fixed subframe type vs. flexible subframe type
Symmetric Traffic Situation

Time 1 Time 2
Resource used for DL/UL
Buffer Status
(Time 1)
UL traffic
DL buffer
UL buffer
Heavy DL Traffic Situation
UL traffic
DL buffer
UL buffer
Buffer Status
(Time 2)eIMTA: Technical Challenges
Power Control
&
Coordinated Scheduling
20
 Subframe-type dependent UL power control and DL measurement
 Separate UL power control parameters for each type of subframes
 Separate DL channel measurement/report each type of subframes
Signaling
 eNB-to-eNB backhaul signaling
 eNB-to-eNB interference power level
 UL/DL traffic condition in each cell
 eNB-to-UE signaling of reconfiguration of DL/UL subframes
 Explicit Layer-1 signaling by a UE group-common control channel
D S U U U D S U U U
D S U D D D S U D D
eNB transmission
in UL resource
A cell operating eNB-to-UE
transmission
A cell operating UE-to-eNB
transmission
UE transmission
in UL resource
eNB-to-eNB interference
UE-to-UE interferenceNCT: New Carrier Type
LTE/WLAN
Radio
Interworking
21
 Reference signal and control overhead reduction relative to LTE
legacy carrier
 Reduced Common Reference Signal (Tracking RS) for
 Improved eNB energy saving, spectral efficiency, interference
coordination, eMBMS services, etc.
 Challenges in RRM measurement and mobility support
 Standalone NCT vs. non-standalone NCT (aggregated to legacy carrier)
Reference
SignalLTE/WLAN Radio Interworking
LTE/WLAN
Radio
Interworking
22
 RAN-level interworking of LTE & WLAN in addition to core network
based interworking mechanisms
 Collocated or non-collocated eNB (LTE) / AP (WLAN): APs controlled by
cellular operators
 WLAN included in operator’s cellular RRM
 Enhancement of access network mobility and selection
- Radio link quality, backhaul quality, load, etc.
 Power efficient WLAN scanning
LTE/WLAN
LTE
WLAN
coordination Other Technologies for Rel. 12 & Onward [1]
 Evolution from previous release/study
– Low cost MTC
 Cost reduction & coverage enhancement for MTC devices
– DL 4 Tx MIMO enhancements
 Feedback enhancement
 Codebook enhancement for 4Tx MIMO
– CoMP Enhancements
 Non-ideal backhaul, RRM, SRS enhancement
– Network assisted advanced receiver
 Receiver performance enhancement through
cooperation between transmitter and receiver
 Mitigate interferences caused by data/control channel
23
eNBB
eNBA
eNBC
X2 interface
UE
Multi-cell MIMO user :
Single-cell MIMO user :
DL UE Data
CSI
Backhaul
Smart
monitoring
Smart Home
Relay Node
(Concentrator)
MTC server
Normal UE
Low cost
MTC devices
Group
Scheduling
D2D– Enhanced MDT (Minimization of Driving Test)
 Smart logging and reporting
– SON enhancements
 Inter-RAT mobility load balancing
– Mobile Relay
 Group mobility support by mobile relay
24
Other Technologies for Rel. 12 & Onward [2]
View All (815)
4G (2) 4G Evolution (1) 5G (35) 5g (1) 802.11 (1) 802.1X (1) ALTO (1) ANDSF (1) AT&T (2) Acceleration (1) Adobe HDS (3) Akamai (6) Amazon (3) Apple HLS (4) Authentication (1) BRAS (2) BT (1) Backbone (4) Backhaul (12) BitTorrent (1) Broadcasting (3) C-RAN (13) C-RAN/Fronthaul (12) CCN (4) CDN (52) CDNi (1) COLT (1) CORD (1) CPRI (2) Cache Control (1) Caching (5) Carrier Cloud (2) Carrier Ethernet (9) Channel Zapping (4) China Mobile (1) China Telecom (1) Cloud (10) Cloudfront (1) DASH (2) DCA (1) DHCP (3) DNS (1) DSA (1) Data Center (7) Dynamic Web Acceleration (1) EPC (5) Energy (1) Ericsson (5) Ethernet (8) FEO (2) Fairness (1) Fronthaul (5) GiGAtopia (1) Gigabit Internet (2) Global CDN (1) Google (5) HLS (1) HTTP (1) HTTP Adaptive Streaming (18) HTTP Progressive Download (3) HTTP Streaming (1) HetNet (1) Hot-Lining (1) Hotspot 2.0 (2) Huawei (3) ICN (4) IP (1) IP Allocation (1) IP Routing (8) IPTV (15) Intel (1) Internet (1) Interoperability (2) IoST (1) IoT (14) KT (22) LG U+ (3) LTE (70) LTE MAC (1) LTE-A (2) Licensed CDN (1) M2M (3) MEC (2) MPLS (25) MVNO (1) Market (4) Metro Ethernet (7) Microsoft (2) Migration (1) Mobile (4) Mobile Backhaul (1) Mobile Broadcasting (1) Mobile CDN (2) Mobile IP (1) Mobile IPTV (3) Mobile Video (1) Mobile Web Perormance (1) Mobility (1) Multi-Screen (7) Multicast (7) NFC (1) NFV (2) NTT Docomo (2) Netflix (6) Network Protocol (31) Network Recovery (3) OAM (6) OTT (31) Ofcom (1) Offloading (2) OpenFlow (1) Operator CDN (14) Orange (1) P2P (4) PCC (1) Page Speed (1) Programmable (1) Protocol (7) Pseudowire (1) QoS (5) Router (1) SCAN (1) SD-WAN (1) SDN (15) SDN/NFV (15) SK Telecom (21) SON (1) SaMOG (1) Samsung (2) Security (6) Service Overlay (1) Silverlight (4) Small Cell (3) Smart Cell (1) Smart Grid (2) Smart Network (2) Supper Cell (1) Telefonica (1) Telstra (1) Terms (1) Traffic (2) Traffic Engineering (1) Transcoding (3) Transparent Cache (2) Transparent Caching (14) VLAN (2) VPLS (2) VPN (9) VRF (2) Vendor Product (2) Verizon (2) Video Optimization (4) Video Pacing (1) Video Streaming (14) Virtual Private Cloud (1) Virtualization (3) White Box (1) Wholesale CDN (4) Wi-Fi (13) WiBro(WiMAX) (4) Wireless Operator (5) YouTube (4) eMBMS (4) eNB (1) 망이용대가 (1) 망중립성 (1) 스마트 노드 (1)

 

 

     
         
     

 

     
     

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