a view to lte-advanced evolution. nokia ieee_iccc...lte as a technology is spreading rapidly: more...
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IEEE/CIC ICC in China, Shanghai, October 13-15, 20 14
A view to LTE-Advanced evolution
14/10/20141 © Nokia 2014
A view to LTE-Advanced evolution
Antti Toskala, Head of Radio Standardization
Nokia Networks, Espoo, Finland
Outline
• Key motivation and building blocks for LTE-Advancedevolution
• Macro cell evolution
• Small cell evolution
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• Small cell evolution
• New use cases
• Summary
Motivation
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LTE as a technology is spreading rapidly: More devices, more users, more operators, more data ov er LTE
VoLTE launched LTE in smartphones• Lower chip set cost
Lumia iPhone
LTE market penetration
Android
0%
20%
40%
60%Korea
Japan
USA
Europe (W)
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• >250 million LTE subscribers globally• >20x more subscribers since end 2011• + data volumes grow per user (see next slide)
Lumia iPhone Android
Leading Markets in Terms of MB/Person/Month (Data f rom 2012 & 2H/2013)
1500
2000
2500
Mobile data usage MB/population/month
More than 2 GB per per person per month in 2012 and
growing over +50% per year
3000 MB*3500 MB
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0
500
1000
1500
Sweden Finland Korea Japan Austria
*Estimated from 1H/2013figure by assuming 30% growth
Building blocks
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Get the most from : Existing cell sites, higher site density, new use case s
Small cellenhancements
MIMO and beam-forming evolution
UE interference
Machine-to-machine(MTC)
HetNet mobility Device-to-device
Small cells Macro cells New market segments
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UE interferencecancellation
HetNet mobilityenhancements
Device-to-devicecommunication /
Public safetyEnhanced CoMP
(Multi-cell scheduling)
FDD + TDD aggregation
3GPP – WLAN interworking
LTE-U (Unlicensed)
Key driver: Carrier Aggregation Evolution
• The 1st feature from LTE-Advanced in the field was carrier aggregation, nowdelivering 300 Mbps peak downlink, moreto come…
• Key enabler for future steps wasFDD/TDD carrier aggregation. Alsoalready shown with commercial chip set
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FDDTDD
already shown with commercial chip set (feature in LTE Release 12)
Small cell evolution
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Small Cell Optimization / Dual connectivity
• Covers macro assisted small cells as well as stand alone small cell• 3GPP work scheduled to be ready December. Dual connectivity enables “inter-site CA”
• Dedicated spectrum for small cells. For example 3.5 GHz• Dual connectivity assumes different spectrum (carrier) for the small cell
• Co-channel case covered with eICIC or CoMP
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Motivations for LTE unlicensed / Licensed-Assisted A ccess (LAA)
• Use cases are outdoor and indoor public small cells• Focus on public /corporate environment• 5 GHz frequency band in focus, widely available globally• Home solution to rely on WLAN � Licensed-Assisted Access always intended
to be used together with licensed band operations
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Outdoor hot spot
Public Indoor cellsHome cells to rely on WLAN (or femto)
Coordinated with macro/micro cells
LTE unlicensed can co-exist with Wi-Fi
• With implementation of the proper ”Listen-Before-Talk” solution a Wi-Fi network will not take anymore hit than it would from the interference due to another Wi-Fi network
• 3GPP Release 13 LTE-Advanced specsexpected to be ready by 06/21060,8
1
1,2
Re
lati
ve
Ca
pa
city
Capacity with LTE & Wi-Fi on the same 20
MHz channel
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0
0,2
0,4
0,6
Separate Channel Same channel Same channel & fairness
algorithm in LTE eNodeB
Re
lati
ve
Ca
pa
city
LTE
Wi-Fi
Ref: Nokia white paper on ”LTE for unlicensed spectrum”: http://networks.nokia.com//ru/file/34596/lte-for-unlicensed-spectrum
Further LTE and Wi-Fi integration?
WLAN AP
NodeB
WLAN SSIDs & Selection guidance
Offloading traffic to suitable WLAN
• Release 12 includes features to give UE guidance on when to select Wi-Fi (and when not)
• What is next step ?
• Radio level aggregation with two
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UE
suitable WLAN • Radio level aggregation with two technologies difficult to make successful. Different spec cycles etc + coupling the implementation tightly slows both down
• Better to evolve from Release 12, ratherthan aim to aggregate the radios
Macro evolution
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•3GPP finalized the enabler for the work – 3D - channel model (Release 12)• Older channel models assume 2 dimensional
(2D) UE distribution -> not suited for evaluation of features like vertical sectorization
3D beamforming
Active Antenna Systemwith Vertical Sectorization
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features like vertical sectorization
• Next steps in Release 13• 3D-beamforming, to look for possible
enhancements to the specifications following the studies up to 8 antenna ports
Then to look for beyond 8 antenna ports
• Massive MIMO / Full Dimension MIMO
UE-Specific Elevation BF / 3D-MIMO
New use cases
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LTE technology extending to new markets
100xcapacity
150 Mbps
10x data rate
LTE-U LTE-D
Expanding to new use cases
Boosting capacity
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10x lower latency
150 Mbps LTE
10x coverage
LTE-M
LTE-B Car-to-car
UHF band
Example new use case: LTE M2M
Release 12 introduced a new low complexity UE category (“Cat-0”)
Further device complexity reduction worked in Rel-13 (cf. TR 36.888)
- Reduced UE receive bandwidth to 1.4 MHz allows for substantial complexity reduction
- The UE will still be able to operate in all existing LTE system bandwidths up to 20 MHz
- A lower UE power class will allow integration of power amplifier in single chip solution
Rel-8 Cat-4 Rel- 8 Cat-1 Rel-12 Cat-0 Rel-13
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Rel-8 Cat-4 Rel- 8 Cat-1 Rel-12 Cat-0 Rel-13
Downlink peak rate 150 Mbps 10 Mbps 1 Mbps ~200 kbps
Uplink peak rate 50 Mbps 5 Mbps 1 Mbps ~200 kbps
Max number of downlink spatial layers 2 1 1 1
Number of UE RF receiver chains 2 2 1 1
Duplex mode Full duplex Full duplex Half duplex (opt) Half duplex (opt)
UE receive bandwidth 20 MHz 20 MHz 20 MHz 1.4 MHz
Maximum UE transmit power 23 dBm 23 dBm 23 dBm ~~20 dBm
Modem complexity relative to Cat-1 125% 100% 50% 25%
Example new use case: Public safety with LTE
Release 12 System Features
Proximity-based Services (ProSe)
Group Communication System Enablers for LTE (GCSE_LTE)
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Release 12 Radio Layer Features
LTE Device to Device Proximity Services
Study on Group Communication for LTE
Summary
• 3GPP has a busy schedule for Release 13
• The new features will extend LTE capabilities to go beyond 100 MHz bandwidth and peak rates in the field continue to grow, especially with LTE-U
• With 300 Mbps in the field today, rapid development continues
• And LTE-Advanced capabilities needs to evolve to enable data growth!
• 5G related studies expected to start from Release 14, 2016 onwards
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2014
Release 13 LTE Advanced work from 09/2014
2015 2016
Release 13 ready 06/2016
• 5G related studies expected to start from Release 14, 2016 onwards
Further LTE-Advanced & 5G
Thank You!Thank You!Thank You!Thank You!
Antti ToskalaHead of Radio StandardizationIndustry Environment
[email protected] (soon @nokia.com)HD-Voice: +358-40-5132710Linnoitustie 602600 EspooFinland
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