lte advanced...lte advanced—the global 4g solution . qualcomm: lte advanced leadership ....
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LTE Advanced February 2012
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LTE Has Strong Commitments
LTE NETWORK LAUNCHES
LAUNCHES NETWORK COMMITMENTS
TDD DEVICES ANNOUNCED TDD LAUNCHES
LTE TDD LAUNCHED
GROWING DEVICE ECOSYSTEM
DEVICES VENDORS
Source: www.gsacom.comJan 2012
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Qualcomm is Committed to Continued LTE Evolution
Screenshot from over the over-the-air HetNet demo, showing picocells range
expansion, within one macrocell
A main contributor to key LTE Advanced features
Major contributor for ITU IMT-Advanced submission
INDUSTRY-FIRST DEMOS
STANDARDS LEADERSHIP
INDUSTRY-FIRST LTE/3G CHIPSETS
MWC 2011: Live Heterogeneous Network Demo
MWC 2012: Live Over-The-Air HetNet Demo with Mobility
Commercial launch 4Q 2010
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LTE Advanced—The Global 4G Solution
Qualcomm: LTE Advanced Leadership Over-the-Air prototype network, design and standards leadership
Small Cells Provide Next Performance Leap Bring the network closer to user and leverage a Heterogeneous network topology
LTE Advanced Makes The Leap Bigger It’s not just about adding small cells—need advanced interference management
Higher Capacity & Enhanced User Experience Higher network capacity, better macro offload and higher data rates for all users
Heterogeneous Networks/HetNets: macro network with added small cells like picocells
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Qualcomm is a Leader in 3G and 4G 2013 2014 2015+ 2012
1X Advanced CDMA2000 1X
HSPA+ Advanced
HSPA+ (Future)
Rel-11 & Beyond Rel-10 Rel-9
HSPA+ (Commercial)
Rel-8 Rel-7
HSPA
LTE Leverages wider and unpaired spectrum
Commercial Note: Estimated commercial dates.
Rel-11 & Beyond Rel-10 Rel-9 Rel-8
LTE Advanced
LTE (FDD and TDD Commercial)
DO Advanced (Future)
Multicarrier
EV-DO
Rev A H/W Upgrade
EV-DO Rev. B (Commercial)
Phase - I Phase - II
DO Advanced
Created 02/08/2012
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The Next Leap In Performance—Small Cells
Adding small cells like Picocells, Femtocells, and Remote Radioheads
How do we get more capacity?
Bring Network Closer to Users—Small Cells
Optimizations Makes the Leap Even Bigger—Smart HetNets
Radio Link approaching theoretical limit
Better Techniques Such as higher order MIMO, Smart Networks
More Spectrum New bands, Re-farming Aggregate TDD spectrum
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LTE Advanced Brings Different Dimensions of Improvements—Most Gain From HetNets
Leverage wider bandwidth
Carrier aggregation across multiple carriers and multiple bands
Leverage heterogeneous network topology (HetNet)
With advanced interference management (low power picocells with adaptive resource partitioning
and advanced receiver based devices)
Leverage more radio links, more antennas
Downlink MIMO up to 8x8, enhanced Multi User MIMO and uplink MIMO up to 4x4
Primarily higher data rates
(bps)
Higher spectral efficiency
(bps/Hz)
Higher spectral efficiency per coverage area
(bps/Hz/km2)
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It’s not just about adding small cells —LTE Advanced makes the leap bigger1
LTE Advanced Hetnets Higher Capacity, Enhanced User Experience, User Fairness
MEDIAN DATA RATE
2.2X
1By applying advanced interference management to HetNets
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Increased Network Capacity and Enhanced User Experience
Range Expansion BETTER UTILIZATION OF SMALL CELLS
Picocell
Macro+Picos
Macro+Picos
Picocell
Macro Only
Data Rate Improvement
Picocell
2.8X
1.4X 1X
LTE
R8
LTE
R8
LTE
Ad
vanc
ed
with
Ran
ge E
xpan
sion
Median downlink data rate1
Assumptions: 4 Picos added per macro and 33% of users dropped in clusters closer to picos (hotspots) : 10 MHz FDD, 2x2 MIMO, 25 users and 500m ISD. Advanced interference management: enhanced time-domain adaptive resource partitioning, advanced receiver devices with enhanced RRM and RLM1Similar gain for the uplink
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Range Expansion Allows More Users to Benefit From Small Cells SIGNIFICANTLY BETTER MACRO OFFLOAD
Number of Picos per Macro cell 2 4 10
LTE R8
Range Expansion
Percentage of pico users1
Assumptions: TR 36.814, Macro ISD=500m, 100 antenna downtilt 25 UEs per Macro cell, uniform random layout, 10 MHz FDD, 2x2 MIMO. 1And enhanced RRM and RLM to allow handover to weak cells, to maintain reliable link with weak cells, and to provide accurate feedback with resource partitioning. Standards name eICIC: Enhanced inter-cell interference coordination 1For uniform, random user distribution
82%
57%
37% 26%
12% 6%
Small Cell
RANGE EXPANSION
1) Adaptive Resource Partitioning1 2) Advanced Receiver Devices with Interference Cancellation
Enabled By:
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Ensures Ubiquitous Broadband Experience EVEN WHEN SMALL CELLS CANNOT BE PLACED AT OPTIMAL LOCATION
Assumptions: 4 Picos per Macro randomly dropped within macro coverage, see 3GPP R1-101509. Based methodology in TR 36.814: 10 MHz FDD, 2x2 MIMO, 25 users and 500m ISD . Worst user is defined as 5 percentile user, typically the Cell edge user 1Typically cell edge users, similar gain experienced for the uplink
Picocell
Picocell
Picocell Macro+Picos
Macro+Picos
Macro Only
SIGNIFICANTLY HIGHER % OF USERS WITH >1 Mbps
78%
38%
22%
LTE
R8 LTE
R8
LTE
Ad
vanc
ed
with
Ran
ge E
xpan
sion
Macro+Picos
Macro+Picos
Macro Only
1.7X
1.05X 1X
LTE
R8
LTE
R8
LTE
Ad
vanc
ed
with
Ran
ge E
xpan
sion
IMPROVES ‘WORST’ CELL EDGE USER1
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Adaptive Interference Management Adapts to Network Changes And Actual Network Load
1Advanced adaptive interference management : enhanced time-domain adaptive resource partitioning with enhanced RRM/RLM and advanced receiver devices
Provides network load balancing Benefits all Hetnets—but necessary for dense HetNets
Adapts to typically uneven load that changes with time and location
Heavy Load Medium Load Light Load
Adapts to added nodes, like Picocells
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THE SECRET SAUCE: ENABLES RANGE EXPANSION THAT ALLOWS MORE USERS TO BENEFIT FROM SMALL CELLS
1With almost blank subframes
FULL BACKWARD
COMPATIBILITY1
ADAPTIVE RESOURCE
PARTITIONING
ADVANCED RECEIVER DEVICES
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Adaptive Resource Partitioning:
PICOS
MACRO MACRO
PICOS
MACRO
PICOS
TIME
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ADVANCED RECEIVER DEVICES WITH INTERFERENCE CANCELLATION
(CANCELLING OVERHEAD CHANNELS1)
TO DISCOVER SMALL CELLS
TO ENABLE HIGHER DATA RATES
TO ENABLE FULL RANGE EXPANSION
1Device interference cancellation cancels overhead channels such as common reference signal(CRS)
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Today: Our Testbed Tomorrow: Your Network
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Qualcomm’s LTE Advanced Testbed
EVALUATING THE DESIGN AND FEATURES TO REALIZE FULL BENEFITS OF HETEROGENEOUS NETWORKS
Evaluating the design and features to realize the full benefits of heterogeneous networks
Over-The-Air HetNet Live since March 2011 Multiple macrocells and picocells in a co-channel deployment Demonstrating e.g. pico discovery and range expansion with mobility
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LEVERAGE WIDER BANDWIDTH
Carrier aggregation across multiple carriers and multiple bands
PRIMARILY HIGHER DATA RATES
(bps)
CARRIER AGGREGATION
LTE Carrier #5
LTE Carrier #4
LTE Carrier #3
LTE Carrier #2
LTE Carrier #1 Aggregated
Data Pipe Up to
100 MHz
ENHANCES USER EXPERIENCE
HIGHER PEAK AND USER DATA RATES
(OVER 1 GBPS POSSIBLE)
LEVERAGES ALL SPECTRUM ASSETS
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LTE C
arrier #5
LTE C
arrier #4
LTE C
arrier #3
LTE C
arrier #2
LTE C
arrier #1
Aggregated Data Pipe
Carrier Aggregation Leverages All Spectrum Assets
Aggregate spectrum within a band to create a fatter data pipe
Aggregate across spectrum bands
Aggregate more downlink capacity— supplemental downlink (unpaired spectrum)
Enhances heterogeneous networks (multiple carriers)
Aggregation within band E.g. 2.6 GHz
10 MHz
Macro Pico
Carrier 1
Carrier 2
Pico
Example: Carrier 1 used for wide area macro coverage, but also by picocells, carrier 2 used by all nodes, but with lower power around macrocell
10 MHz
Supplemental Downlink E.g. 700MHz
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Qualcomm: Continued Standards Leadership
Notes 1Based on pre-meeting contribution count for 3GPP RAN WG4 (in charge of performance requirements) . 2E.g. for femtocells and positioning across all working groups and areas. Examples of features such as Mobility, access control, local IP access, system definition, security . 3for single point transmission results, also showed that that Network-MIMO/CoMP techniques were not required to satisfy those requirements.
A leading contributor for LTE performance definition in 20091
Leader in several key LTE standards areas2
A Main contributor to key LTE Advanced features Carrier aggregation, self-organizing network, relay, waveform
Major contributor for ITU IMT-Advanced submission First company to show results satisfying IMT-Advanced requirements3
LTE Rel-10 HetNet work item completed June 2011 Enhanced inter-cell interference coordination (eICIC) work item completed in Rel-10 Additional eICIC enhancement considered for Rel-11
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Common LTE FDD & TDD Chipset Platform
MSM 8960 LTE
DC-HSPA+/DOrB EDGE
MDM 9200 LTE
DC-HSPA+ EDGE
MDM 9600 LTE
DC-HSPA+/DOrB EDGE
• 50+ designs by 25+ OEMs • Commercial 4Q 2010 • 100 Mbps DL/50 Mbps UL
• Dual-Core CPU (28nm) • Superior graphics & multimedia • Integrated connectivity (WLAN, GPS,
Bluetooth, FM)
• MSM8960 launches in 2012 • Handset & tablet launches in 2011 based on MDM9x00+MSM
MODEMS & DATA CARDS SMARTPHONES & TABLETS
Industry’s First LTE/3G Multimode Chipsets
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Qualcomm: LTE Advanced Leadership
A Leading Contributor to LTE Advanced
Standards
Spearheading Technology
Design Efforts
State-of-the-Art LTE Advanced OTA Network
Ensures user fairness
Significantly higher capacity
(Range expansion)
Enhanced user experience
Better macro offload
IT’S NOT JUST ABOUT ADDING SMALL CELLS —LTE ADVANCED REALIZES FULL BENEFITS OF HETNETS
Heterogeneous Networks /HetNets: macro network with added small cells like picocells
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Questions? Connect with Us
www.qualcomm.com/technology
http://www.qualcomm.com/blog/contributors/prakash-sangam
@Qualcomm_Tech
http://www.slideshare.net/ qualcommwirelessevolution
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Additional Slides
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LTE Carrier #5
LTE Carrier #4
LTE Carrier #3
LTE Carrier #2
Carrier Aggregation Enhances User Experience
LTE Carrier #1 Aggregated
Data Pipe Up to
100 MHz
LTE Multicarrier Device
eNodeB
Up to 20 MHz
Up to 20 MHz
Up to 20 MHz
Up to 20 MHz
Increased data rates and lower latencies for all users in the cell Can more than double bursty application capacity
Data rates scale with bandwidth—over 1 Gbps peak data rate Aggregating 40 MHz to 100 MHz provide peak data rates of 300 Mbps to 750 Mbps1 (2x2 MIMO) and over 1 Gbps (4x4 MIMO)
1LTE R8 supports 4x4 MIMO, which enables 300 Mbps in 20 Mhz. Theoretically, LTE Advanced can support over 1Gbps peak data rates by aggregating at least 4 20 MHz carriers (up to100 MHz of spectrum) using 4x4 MIMO.
Up to 20 MHz
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Adaptive Time-Domain Resource Partitioning
Adapts to topology, load and user distribution
Mitigates interference
Time Domain Partitioning Example a.k.a enhanced inter-cell interference coordination
Adaptive Partitioning Example 25% Semi static to macro and pico, 50% adaptive
LTE R8 provides limited interference management; primitive X2-based—adaptive resource partitioning utilizes modified X2. Frequency partitioning is the only option for asynchronous networks (Networks without GPS timing) 1Static and semi static allocation signaled to device. Enables flexible partitioning options, e.g. pico could also use reserved macro subframes (without benefits of range expansion)
Time-Domain Resources
Subframes reserved for macro
Subframes reserved for pico
Macro DL
Pico DL
Blank subframes
Ensure fairness Flexible and adaptive
partitioning options
Time-Domain Resources
Macro DL
Pico DL
Adaptive subframes, served by pico or macro
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Advanced Receiver Devices with Interference Cancellation Enable Full Range Expansion
New device can utilize full range
(LTE R10)
Legacy device cannot utilize expanded range
(LTE R8/9)
Time-Domain Resources
1Adding overhead channels such as synch, broadcast and common reference signal to ‘blank subframes’ to support legacy devices 2Device interference cancellation cancels overhead channels such as such as synch, broadcast and common reference signal(CRS) to enable full range expansion.
Advanced Receiver Devices2: 1) Discover small cell in ‘expanded range’
2) Enable higher data rates 3) Effectively expand small cell range
Example with no pico reserved subframes
Macro DL
Pico DL
Support Legacy Devices1 Continue to transmit overhead channels
in ‘almost blank’ frames
Range expansion for new devices Subframes not used by macro reduces interference
Subframes reserved for macro
Small cell
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Relays Extend Coverage and Improve Capacity without Backhaul Expenses
RANGE EXPANSION
Assumptions: Results from 3GPP R1-094230; Based on methodology in R1-084026 10 MHz FDD, 2x2 MIMO UE, 10 Layer 3 Relays per Macro cell, uniform random layout. Advanced interference management includes intelligent node association and adaptive resource allocation
Picocell
Relays use part of macro capacity as backhaul
Relay Node
Macro+Relays
Macro+Relays
MEDIAN USER
1.8X
1X
Downlink Data Rates
Advanced Interference
Management (Range Expansion)
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