235985018 carrier aggregation
TRANSCRIPT
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Copyright© ANRITSU
Carl Anderson
Sr. Business Development Manager
Carrier Aggregation
July 2014
Mobile Devices Solutions
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Copyright© ANRITSU
Topics
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• The Case for Carrier Aggregation
• Carrier Aggregation: Concepts, Drivers & Roadmap
• Network Deployment Options
• Overview of Carrier Aggregation in LTE-A
• Testing of Carrier Aggregation – Anritsu Solutions for LTE Carrier Aggregation
• Conclusions and Q&A
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The Case for
Carrier AggregationMobile Devices Solutions
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Mob ile Data Usage
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• Huge growth is predicted
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Spectrum Congest ion
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• Technology is reaching the limits of spectral efficiency (bps/Hz)
• Ever increasing user demand (applications) requires more bandwidth
• Few areas with large contiguous blocks of spectrum
– Mainly at frequencies greater than 3GHz
• Available “prime” spectrum is fragmented in small blocks
US Spectrum Allocation 300 MHz to 3 GHz
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Carrier Aggregation:
Concepts, Drivers & RoadmapMobile Devices Solutions
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Carr ier Aggregat ion (CA) Concepts
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• Increasing RF and Baseband chipset integration opens the possibilityto receive and transmit on more than one carrier simultaneously
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CA Drivers
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• Intra-band Contiguous
aggregation driven by >5 MHz 3Glicenses and spectrum becoming
available from WRC07
– Scale to wider bandwidths whilestill supporting existing UEs
on a single CC• Inter-band aggregation driven by
existing licenses, mergers and
acquisitions, and digital dividend
– Piece together spectrum to
compete with carriers having
contiguous spectrum
Multi-Carrier UE
North American
Licensed Spectrum
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CA Roadmap for LTE
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1 4 20
MHz
300 Mbps
4x4MIMO
4Layers
Release 8
1 4 20
MHz
75 Mbps
SISO/SIMO
1Layer
Release 8
D O W N
L I N K
U P L I N K
1 4 40
MHz
600 Mbps
4x4MIMO
4Layers
Release 10
1 4 40
MHz
300 Mbps
2x2MIMO
2Layers
Release 10
1 4 100
MHz
3000 Mbps
8x8MIMO
8Layers
Release 12+
1 4 100
MHz
1500 Mbps
4x4MIMO4Layers
Release 12+
1 4 40
MHz
1200 Mbps
8x8MIMO
8Layers
Release 11
1 4 40
MHz
600 Mbps
4x4MIMO4Layers
Release 11
Note: Likely Peak Performance Indicated
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RFT-103 Carrier
Aggregation
WI-162 E-UTRA Carrier
Aggregation
Ind us try and Cert if icat ion Trends for CA
Trial/Planning: 30
Certification Start 2014Certification Started
Commercial CarriersDeploying/Pre-
Commercial
…& 3 more in
Kuwait and
Saudi Arabia
http://www.globalcertificationforum.org/?view=featuredhttp://www.ptcrb.com/index.cfm?tab=Home
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Network Deployment
OptionsMobile Devices Solutions
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Netwo rk Deployment Opt ion s
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Identical Coverage
Intra-band Contiguous CCs
Diverse Coverage
• Using wideband transceiver in the eNB • Improve coverage at sector edges
f 1
f 2
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Netwo rk Deployment Opt ion s(cont inued)
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Remote Radio Heads
Inter-band Non-Contiguous CCs
CA in a Heterogeneous Network
f 1
f 2
• High frequency carrier used to provide hot-
spots of greater capacity
• Pico-cells / femto-cells used to offload the
macro-cell
• Intra-cell interference coordination used to
increase capacity
Note: Conceptual only. Distributed antennas not currently supported by 3GPP
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Carrier Aggregation
in LTE-AMobile Devices Solutions
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CA Band No tat ion and Rel. 11 Implementat ions
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• Format for CA Band Notation
Intra-Band
Contiguous
Intra-Band
Non-Contiguous
Inter-Band
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CA Band No tat ion and Rel. 11 Implementat ions
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• Rel. 10 and 11 Examples
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CA UE Bandw idth Classes
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Channel bandwidth BWChannel
[MHz] 1.4 3 5 10 15 20
Transmission bandwidth configuration N RB
6 15 25 50 75 100
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CA Band /Bandw idth Class Combinat ion s
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• Format for CA Band/Bandwidth Class Notation
Inter-BandIntra-Band
Contiguous
Intra-Band
Non-Contiguous
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CA Band /Bandw idth Class Combinat ion s
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• Rel. 10 and 11 Band/Bandwidth Combinations
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3 Carrier CA
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• 3GPP RAN 4 is working on 3 Carrier Combinations as well as
FDD+TDD for Release 12
• The work needs to move to RAN5 and be finalized before test cases
for these features are known
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LTE-A CA Overv iew
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• Uses R8/9 backward-compatible carriers as the basic building blocks
• Signaling supports aggregation of up to 5 CCs in both UL and DL• One CC acts as the anchor (Primary) for mobility, others (Secondaries)
are added/released through signaling on Primary
• Supports Intra-band contiguous, non-contiguous, and Inter-band
• Supports use of Remote Radio
Heads and Relay Nodes
• Supports both symmetric and
asymmetric aggregations
Note: Although signaling supports up to 5 CCs, 3GPP Releases support specific configurations
Release 10: In DL max 2 DL inter or intra-band contiguous or non-contiguous CCs,
In UL max 2 intra-band contiguous CCs
Release 11: In DL same as Rel10,
In UL max 2 intra-band contiguous or non-contiguous CCs
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Changes from LTE to LTE-A
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• Introduction of PDSCH-only downlink
– Cross-carrier scheduling with Carrier Identifier Field (CIF) in PDCCH
• Measurements
– New event A6 added for Scell change
• DRX
– Added capability for S-Cell
activation/deactivation• BSR
– New BSR table added to support
higher data rates
PCC – Primary Component Carrier
SCC – Secondary Component Carrier
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LTE-A Upper Layers
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• NAS
– No impact; only uses
P-Cell
• RRC
– New signaling for
management of SCC
– New measurement
control
• PDCP/RLC
– Same architecture but
need to handle higherdata throughputs
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LTE Catego ries
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Carr ier Ac t ivation and DRX
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• Additional Scell CCs are Activated Through a MAC Control Element
(CE) – CC is Available for Scheduling 8 Subframes Later
• Timer Starts on SCell Activation
– If No Data is Scheduled by PDCCH for Timer Period, SCell is Deactivated
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Phys ical Layer Aspects o f CA (1)
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• Downlink Channel Quality
– CQI reported for each CC on the PUCCH or PUSCH if active• Uplink Control Signaling
– Rel. 8 HARQ bandwidth not adequate for additional CCs
– PUCCH format 3 created to allow for 10 ACK/NACK bits (FDD)
• Uplink Channel Quality
– Sounding Reference Signal (SRS) request and transmission on PCells andSCells enabled
• Uplink Transmit Power Control (TPC)
– PUCCH and 1 or more PUSCHs can be power controlled independently
– PDSCH TPCs on PDCCH of PCell or SCell
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Phys ical Layer Aspects o f CA (2)
• Downlink Radio LinkMonitoring – UE evaluates Radio Link quality and
failure through the Pcell
– More effective to deploy Pcells aslower frequency in inter-band CA
scenarios due to better propagation
• Timing and Synchronization – In the case of a co-located eNB,
timing advance the same regardlessof frequency (band)
• Cross-Carrier Scheduling – Decreases interference for HetNets – 3 Bit Carrier Indicator Field (CIF)
Allows for Up to 7 Carriers
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RRC Layer Aspects o f CA (1)
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• UE Capability Transfer Procedure
– UE Category• CA support implied by cat. 6-8 - CA config signaled separately
– Cross-Carrier Scheduling Support
– Simultaneous PUSCH and PUCCH TX
• Supports simultaneous PUSCH and PUCCH on different CCs
– Supported Band Combinations
• Support for specific frequency band and bandwidth comb.
– Event A6 Support
• Neighbor PCell becomes stronger than a serving SCell by D
– SCell Addition During Handover to E-UTRAN
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RRC Layer Aspects o f CA (2)
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• SCell Addition and Removal
– SCells cannot be added immediately at RRC establishment• Added and removed through RRC Connection Reconfiguration
procedure
– Since intra-LTE handover is treated as RRC Connection
Reconfiguration, CA “handover” is possible
• Handover Procedures for CA are Largely the same as
Release 8 and 9
– New event A6 when neighbor PCell becomes larger than service
SCell
• Handover to neighbor Pcell depending on network conditions
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Testing of
Carrier Aggregation
Mobile Devices Solutions
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Test ing of Carr ier Aggregat ion
- High -Level Test Requ irements
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• Potentially Large Numbers of Transmitters and Receivers
– 5 CCs with 8 x n MIMO with Handover => 80 Transmitters – All may require independent up-conversion
– 5 CCs with n x 4 MIMO with Handover => 40 Receivers
– All may require independent down-conversion
• High Peak Data Rates – Up to 50K IP Packets/sec with some functions requiring processing per
packet (e.g. ROHC)
– e.g., Current solutions use 1Gbps Ethernet
• Logging
– Tracing problems may require very smart search and filter tools – Logging at each layer can generate huge amounts of data
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Test ing of Carr ier Aggregat ion
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• Development Testing
– New L1 and L2 features – New RRC signaling
– High rate bearers
– New connected mode mobility permutations
• Conformance Testing
– New RF tests for each band combination – New RRM tests for new measurement types
– New Protocol tests for L2 extensions and for R10 RRC signaling
• Carrier Acceptance Testing – Operator specific band combinations
– Device performance
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Device Test Market Model
Conf.& Carrier
Acceptance Test
Alternate Channel
Distribution/Integ.
Carrier
Distribution
Consumer AftermarketService
BB Chipset
Development
ODM
UE Integration
OEMIntegration
EMS
Factory
OEM
Factory
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FDD TRX/Perf CA Test Examp les – In ter-Band
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CA Signal ing Test Examp les
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7.1.3.11 Addition of new CA test case: CA / Correct HARQ process handling / DCCH and DTCH /
Pcell and Scell Rel-10
7.1.4.21 CA / UE power headroom reporting / Extended PHR Rel-10
7.1.9.1 CA / Activation/Deactivation of SCells / Activation/Deactivation MAC control element
reception / sCellDeactivationTimer Rel-10
8.2.2.3 CA / RRC connection reconfiguration / SCell addition/modification/release / Success Rel-10
8.2.2.4 CA / RRC connection reconfiguration / SCell SI change / Success Rel-10
8.2.2.5 CA / RRC connection reconfiguration / SCell Addition without UL / Success Rel-10
8.2.4.17 CA / RRC connection reconfiguration / Handover / Success / PCell Change and SCell
addition Rel-10
8.2.4.18 CA / RRC connection reconfiguration / Handover / Success / SCell release Rel-10
8.3.1.17 CA / Measurement configuration control and reporting / Intra E-UTRAN measurements /
Event A6 Rel-10
8.3.1.18 CA / Measurement configuration control and reporting / Intra E-UTRAN measurements /
Additional measurement reporting Rel-10
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LTE Carr ier Aggregat ion Solut ions
Conformance
Test
Carrier
Acceptance
Test (CAT)
ProductionIntegration /
Functional Test
Chipset Design /
Core UE R&D
MS269xA & MS2830A
Signal Analyzer
MG3710A
Signal Generator
MD1230B
Data Quality Analyzer
MT8820CRadio Communication
Analyzer
(UE Calibration and
RF Parametric Test)
MT8820C
Radio Communication
Analyzer
(RF Parametric Test)
ME7873L
RF Conformance Test System
ME7834L
Mobile Device
Test Platform
MD8475A
Signaling Tester
(Application Test)
MD8430A
Signaling Tester with RTD
(L1/L2, Protocol Stack Test)
MD8475A
Signaling Tester
(Application Test)
ME7873L
RF/RRMConformance
Test System
ME7834L
Mobile Device
Test Platform
MT8870A
Universal Wireless
Test Set
(UE Calibration and
RF Parametric Test)
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MWC LTE Advanced CA Demos
2012 – Intra-Band CA with Signalion UEs 2013 – Inter-Band CA with Qualcomm FFA
B4 + B17
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MD8430A Carrier Aggregation Demos at MWC
2012 – Intra-Band CA with
Signalion UEs
2013 – Inter-Band CA with
Ref. Design B4 + B17
2014 – Cat. 6 Inter-Band CA
Intel 7260 Ref. Design
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Conc lus ions
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• Huge growth in mobile data usage is driving demand for
more network capacity – Carrier Aggregation provides a highly flexible solution with
excellent re-use of existing standards and an easy route to provide
backwards compatibility with legacy devices
• Carrier Aggregation Drives Complexity in both the Wireless
Device and Base Station Simulator (Test Equipment)
• Anritsu Supports the Evolution to Carrier Aggregation with
a Parallel Portfolio of Both HSPA and LTE Capabilities
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Thank You!
For more information on Anritsu’s products please visit:
www.anritsu.com or call
1-800-ANRITSU (267-4878)
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