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The 5G Unified Air Interface
Scalabletoanextremevariationofrequirements
November, 2015
Qualcomm Technologies Inc.
TM
5G to meet significantly expanding connectivity needs
2
Edgeless
For uniform experiences with
new ways of connecting
Unified
Across all spectrum types/bands,
services and deployments
Scalable
To an extreme variation of
requirements
Empowering
new user experiences
new industries and devices
new services
Building on the transformation started in 4G LTE
5G will enhance existing and expand to new use cases
3
Massive Internet of Things
Efficient, low cost communications with deep coverage
Enhanced Mobile Broadband
Faster, more uniform user experiences
Mission-Critical Control
Ultra-low latency and high reliability
Smart homes/
buildings/cities
Autonomous vehicles,
object tracking
Remote control & process
automation, e.g. aviation, robotics
Critical infrastructure protection
& control, e.g. Smart Grid
Extreme mobile broadband,
e.g. UHD virtual reality
Demanding indoor/outdoor
conditions, e.g. venues
New form factors,
e.g. wearables and sensors
Scalable across an extreme variation of requirements
4
Massive Internet
of Things
Mission-critical
control
Enhanced
mobile broadband
Deep coverage
To reach challenging locations
Ultra-low energy
10+ years of battery life
Ultra-low complexity
10s of bits per second
Ultra-high density
1 million nodes per Km2
Extreme capacity
10 Tbps per Km2
Extreme data rates
Multi-Gigabits per second
Deep awareness
Discovery and optimization
Extreme user mobility
Or no mobility at all
Ultra-low latency
As low as 1 millisecond
Ultra-high reliability
<1 out of 100 million packets lost
Strong security
e.g. Health /government/ financial trusted
Based on target requirements for the envisioned 5G use cases
A new 5G unified air interface is the foundation
5
FDD, TDD, half duplex
Licensed, shared licensed,
and unlicensed spectrum
Spectrum bands below 1 GHz,
1 GHz to 6 GHz, & above 6 GHz
(incl. mmWave)
Device-to-device, mesh,
relay network topologies
From wideband multi-Gbps to
narrowband 10s of bits per second
Efficient multiplexing of mission-critical
and nominal traffic
From high user mobility
to no mobility at all
From wide area macro to
indoor / outdoor hotspots
Diverse spectrum Diverse services and devices
Diverse deployments
Unified air interface
Designing the 5G Unified Air Interface
A new PHY & MAC design that is scalable to an extreme variation of requirements
6
Optimized OFDM-based
waveforms
With scalable numerology and TTI,
plus optimized multiple access
for different use cases
A common, flexible
framework
To efficiently multiplex services
and features—designed for
forward compatibility
Advanced wireless
technologies
Such as massive MIMO, robust
mmWave and a flexible
self-contained TDD design
Designing optimized
waveforms & multiple
access with heavy
reliance on OFDM
7
Helps achieve better
frequency localization
Transmitted Waveform
after windowing
IFFT outputCP
Time
Data transmitted via closely-spaced, narrowband subcarriers –
IFFT operation ensures subcarriers do not interfere
Bandwidth
Helps maintain orthogonality
despite multipath fading
CP
Time
IFFT/FFT is the foundation to OFDM
Quick refresh on Orthogonal Frequency Division Multiplexing
8
Simplified OFDM
waveform synthesis
for a transmitter
Data
Serial to
Parallel
IFFT
Cyclic
Prefix (CP)
Insertion
Windowing
/Filtering
0s
0s
To RFCoding &
Modulation
OFDM-based waveforms highly utilized in e.g. LTE and Wi-Fi systems today
OFDM family well suited to meet 5G requirements
Wide bandwidth, high capacity, low latency, low complexity per bit
9
Scalable
To wide bandwidths with
scalable symbol duration and
subcarrier spacing
Low Complexity
Does not require complex
receivers even when scaling
to wide bandwidths
Efficient for MIMO
Elegant framework for MIMO
spatial multiplexing that scales
to wider bandwidths
MIMO
Scalable sub-carrier spacing
Scalable bandwidth
Higher spectral efficiency
The OFDM family allows for enhancements
To address different use cases—a key focus for 5G
10
Support for asynchronous, grant-
free multiple access such as
Resource Spread Multiple Access
Additional OFDM windowing/filtering
reduces both inter-symbol1 and
inter-channel2 interference
Add DFT spreading to achieve a
single-carrier OFDM signal with
smaller power variations
Frequency localization
To reduce in-band and
out-of-band emissions
Uplink energy efficiency
Due to power variations on
a per OFDM subcarrier basis
Asynchronous uplink
To support sporadic uplink
transmissions of small data bursts
Such as for massive IoT
zzz
zzz
zzz
Especially in macro deployments
1 Among users within allocated band; 2 among neighboring operators, e.g. low Adjacent-Channel Leakage Ratio (ACLR)
Numerous OFDM-based waveforms considered for 5G
11
UFMC2
Customized filtering over a block
of contiguous OFDM subcarriers2
FBMC / GFDM3
Customized subcarrier pulse shaping
achieved through oversampling4
Zero-tail SC-OFDM
DFT spreading with dynamic zero-pad instead
of fixed CP for higher spectral efficiency
1 Time domain windowing heavily used in commercial LTE systems, but not specified in 3GPP standard; 2 Universal Filtered Multi-Carrier; 3 Filter Bank Multi-Carrier and Generalized Frequency Division Multiplexing
IFFT/FFT
All waveforms based
on OFDM Synthesis
CP-OFDM with windowing1
Time domain windowing to soften edges of
symbols—used in 4G LTE downlink today
SC-OFDM with windowing1
DFT spreading with cyclic prefix (CP)
insertion—used in 4G LTE uplink today
Multi-carrier OFDM waveforms
OFDM variants with windowing/filtering
enhancements for better frequency localization
Single-carrier OFDM waveforms
Single-carrier OFDM variants that use DFT
spreading to reduce power variations in uplink
CP-OFDM & SC-OFDM with windowing most optimal
Alternative proposals add complexity—radio design, multiplexing—with marginal benefits
121 Due to non-linearity in practical receiver implementations; Qualcomm Research is a division of Qualcomm Technologies, Inc.
UFMC
GFDM
FBMC
• Best frequency localization
(marginalized in practical systems1)
• Requires complex modulation
• Integration with MIMO non-trivial
• Better frequency localization than CP-OFDM
(equivalent to CP-OFDM with windowing)
• High Tx and Rx (2x FFT size) complexity
• No CP – interference from multipath fading
• Better frequency localization than CP-OFDM
(equivalent to CP-OFDM with windowing)
• Complicated receiver to handle interference
• Requires large guardband to multiplex services
Pros Cons
Download Qualcomm Research whitepaper for detailed analysis:
www.qualcomm.com/documents/5g-waveform-multiple-access-techniques
Zero-tail
SC-OFDM
• Marginal spectral efficiency gains
• Better OOB suppression with synchronization
• Requires extra signaling that adds complexity
• Non-trivial to multiplex with OFDM
Multi-carrier
alternatives
Single-carrier
alternatives
Non-orthogonal, Distributed Scheduling
Different multiple access schemes for different use cases
13
OFDMA & SC-FDMA for mobile broadband and beyond
Utilizes CP-OFDM and SC-OFDM waveforms respectively
OFDMA well suited for spectrally efficient large data transmissions
SC-FDMA well suited for efficient UL transmissions in macro deployments
Orthogonal, Centralized Scheduling
Resource Spread Multiple Access (RSMA) for target use cases
Enables asynchronous, non-orthogonal, contention-based access well suited for e.g. IoT UL
Spreads bits through low rate coding1 across resource elements in time or frequency
Signals may occupy same resources—separate with different e.g. scrambling codes
1 As opposed to legacy Code Division Multiple Access (CDMA) schemes which attempted to orthogonalize users with e.g. Walsh codes
Frequency
Time
Time
Frequency
Optimized 5G waveforms and multiple access
With heavy reliance on the OFDM family
14
5G Downlink
A single waveform for flexible service multiplexing
5G Uplink
Optimized waveforms for different use cases
CP-OFDM1 + OFDMA
Also recommended for D2D & basestation-to-basestation
communications to maximize transmit/receiver design reuse
SC-OFDM1 + SC-FDMA
To maximize device energy efficiency
Macro
coverage
CP-OFDM1 + OFDMA
To maximize spectral efficiency
Small
cells
Low energy single-carrier2 + RSMA
For energy efficient small data bursts
Massive
IoT
Mission-
critical
CP-OFDM/SC-OFDM1 + RSMA3
For low latency, grant-less small data bursts
1 With time domain windowing as common in LTE systems today; 2 Such as SC-FDE and GMSK; 3 May also use OFDMA/SC-FDMA for applications that may be scheduled
Download Qualcomm Research whitepaper for detailed analysis:
www.qualcomm.com/documents/5g-waveform-multiple-access-techniques
Designing a flexible
framework to multiplex
envisioned & unknown
5G services
15
Unified 5G design across spectrum types and bands
16
Licensed Spectrum
Cleared spectrum
EXCLUSIVE USE
Unlicensed Spectrum
Multiple technologies
SHARED USE
Shared Licensed Spectrum
Complementary licensing
SHARED EXCLUSIVE USE
Below 1 GHz: longer range for massive Internet of Things
1 GHz to 6 GHz: wider bandwidths for enhanced mobile broadband and mission critical
Above 6 GHz, e.g. mmWave: extreme bandwidths, shorter range for extreme mobile broadband
Scalable numerologies to meet diverse deployments
From narrowband to wideband, licensed & unlicensed, TDD & FDD
17
Sub-carrier spacing = N
(extended cyclic prefix)
Outdoor and
macro coverage
FDD/TDD <3 GHz
e.g. 1, 5, 10 & 20 MHz
Indoor
wideband
TDD e.g. 5 GHz
(Unlicensed) e.g. 160MHz
Sub-carrier spacing = 8N
mmWave
TDD e.g. 28 GHz
Sub-carrier spacing = 2N
(normal cyclic prefix)
Outdoor and
small cell
TDD > 3 GHz
e.g. 80 MHz
e.g. 500MHz
Sub-carrier spacing = 16N
Example usage models and channel bandwidths
Blank subcarriers
Scalable TTI WAN
Blank subframes
D2D
Multicast
A flexible framework with forward compatibility
Designed to efficiently multiplex envisioned & unforeseen 5G services on the same frequency
18
Integrated framework
That can support diverse deployment
scenarios and network topologies
Scalable transmission time interval (TTI)
For diverse latency requirements—capable of
latencies an order of magnitude lower than LTE
Mission-critical transmissions
May occur at any time; design such that
other traffic can sustain puncturing1
Forward compatibility
With support for blank subframes and frequency
resources for future services/features
1 Nominal 5G access to be designed such that it is capable to sustain puncturing from mission-critical transmission or bursty interference
Scalability to much lower latency
19
Scalable TTI for diverse
latency & QoS requirements
TTI
Longer TTI for higher
spectral efficiency
Shorter TTI for
low latency
1 Compared to LTE’s 8 HARQ interlaces
Order of magnitude lower Round-Trip
Time (RTT) than LTE today
0 1 0 1
ACK0
Data
ACK ACK1 ACK0
FDD
TDD
HARQ RTT
TTI
Self-contained
design reduces RTT
Fewer (variable)
interlaces for HARQ1
Scalable TTI
Example:
TDD
downlink
Guard
Period
ACK
(Rx)
Ctrl
(Tx)
Data
(Tx)
Data and acknowledgement in the same subframe
Self-contained TDD subframe design
Faster, more flexible TDD switching & turn around, plus support for new deployment scenarios
20
Unlicensed spectrum
Listen-before-talk headers e.g. clear Channel
Assessment (CCA) and hidden node discovery
Massive MIMO
Leveraging channel reciprocity in UL
transmission for DL beamforming training
D2D, mesh and relay
Headers for e.g. direction of the link for
dynamic distributed scheduling
Self-contained TDD sub-frame: UL/DL scheduling info,
data and acknowledgement in the same sub-frame
GuardPeriod
Add’l
headers
ACK
(Rx)
Ctrl
(Tx)
Data
(Tx)
Adaptive UL/DL configuration
Flexible capacity allocation;
also dynamic on a per-cell basis
Example:
TDD
downlink
Designing Forward Compatibility into 5G
Flexibly phase in future features and services
21
Blank resources1
Enable future features/service
to be deployed in the same
frequency in a synchronous and
asynchronous manner
Service multiplexing
E.g. nominal traffic designed
to sustain puncturing from
mission-critical transmissions
or bursty interference
Common frame structure
Enable future features to be deployed
on a different frequency in a tightly
integrated manner, e.g. 5G sub 6 GHz
control for mmWave
5G below 6GHz
5G above 6GHz
1 ‘Blank’ resources may still be utilized , but designed in a way to not limit future feature introductions
WAN
Multicast
Blank
subframes
Blank subcarriers D2D
WAN WAN
Mission-critical
Natively incorporate
advanced wireless
technologies across
5G services
22
Natively incorporate advanced wireless technologies
Key 5G design elements across services
23
Massive Internet of Things
Efficient, low cost communications
Mission-Critical Control
Ultra-low latency and high reliability links
Unified Air
Interface
Enhanced Mobile Broadband
Faster, more uniform user experiences
• Scalable to wider bandwidths
• Designed for all spectrum types
• Massive MIMO
• Robust mmWave design
• Improved network/signaling efficiency
• Native HetNets & multicast support
• Opportunistic carrier/link aggregation
• Low complexity, narrow bandwidth
• Low energy waveform
• Optimized link budget
• Decreased overheads
• Managed multi-hop mesh
• Ultra-low latency bounded delay
• Optimized PHY/pilot/HARQ
• Efficient multiplexing with nominal
• Simultaneous, redundant links
• Grant-free transmissions
Enhanced mobile broadband
Ushering in the next era of immersive experiences and hyper-connectivity
24
UHD video streaming
Broadband ‘fiber’ to the home Virtual realityDemanding conditions, e.g. venues
Tactile Internet3D/UHD video telepresence
Extreme throughput
multi-gigabits per second
Ultra-low latency
down to 1ms e2e latency
Uniform experience
with much more capacity
For diverse spectrum
bands/types and
deployment models
Tight integration with
sub 6 GHz, e.g.
carrier aggregation
Lower latency and TDD
dynamic interference
management
Capacity and coverage
enhancements for
higher spectrum bands
Common framework
for different spectrum
types
Control plane
improvements for better
efficiency
Scalable
OFDM
numerology
Massive
MIMO
Flexible
FDD/TDD
subframe
design
Reliable,
high
capacity
mmWave
Fair
sharing of
spectrum
Device-
centric
mobility
Scaling up to enhance mobile broadband
Key 5G Unified Air Interface design elements
25
Massive MIMO at 4 GHz allows reuse of existing sites
Leverage higher spectrum band using same sites and same transmit power
26Source: Qualcomm simulations; Macro-cell with 1.7km inter-site distance, 10 users per cell, 46 dBm Tx power at base station,, 20MHz@2GHz and 80MHz@4GHz BW TDD, 2.4x Massive MIMO – detailed simulation data available in the appendix
Cell edge user throughput
2GHz
2x4 MIMO
20MHz
2.7Y
4GHz
2x4 MIMO
80MHz
10.5Y
4GHz
24x4 Massive
MIMO 80MHz
Median user throughput
X
2GHz
2x4 MIMO
20MHz 3.4X
4GHz
2x4 MIMO
80MHz
13.9X
4GHz
24x4 Massive
MIMO 80MHz
Macro site
1.7km inter-site distance
Y
Realizing the mmWave opportunity for mobile broadband
27
Smart beamforming &
beam tracking
Increase coverage & provide
seamless connectivity
Solutions
mmWave
sub6Ghz
Tight interworking
with sub 6 GHz
Increase robustness and
faster system acquisition
Phase noise mitigation
in RF components
For low cost, low
power devices
The extreme mobile broadband opportunity The challenge—‘mobilizing’ mmWave
• Large bandwidths, e.g. 100s of MHz
• Multi-Gpbs data rates
• Flex deployments (integrated access/backhaul)
• High capacity with dense spatial reuse
• Robustness due to high path loss and
susceptibility to blockage
• Device cost/power and RF challenges
at mmWave frequencies
Making mmWave a reality for mobile
Qualcomm Technologies is setting the path to 5G mmWave
28
60 GHz chipset commercial today
For mobile devices, notebooks and access points
Qualcomm ® VIVE™ 802.11ad technology for the
Qualcomm® Snapdragon™ 810 processor operates in
60 GHz band with a 32-antenna array element
Qualcomm VIVE is a product of Qualcomm Atheros, Inc.; Qualcomm Snapdragon is a product of Qualcomm Technologies, Inc.
Developing 5G mmWave
For extreme mobile broadband both outdoor and indoor
28 GHz outdoor example with ~150m dense urban LOS
and NLOS coverage using directional beamforming1
Manhattan 3D Map
* Results from ray-tracing1
1 Based on Qualcomm Simulations
Unlicensed spectrum with
licensed anchor channel
Shared licensed
spectrum solutions
Pure unlicensed
spectrum
Making the best use of all spectrum types
29
LTE-U and LAA
Licensed shared
access (LSA) and
similar
MuLTEfire™
Introduced in 4G LTE Efficiently designed for
all spectrum types from
the beginning
Fair coexistence across all spectrum types
Aggregation across spectrum types and bands
To efficiently grow data capacity
Device-centric mobility management in 5G
Control plane improvements to improve energy and overhead efficiency
30
1 Coordinated MultiPoint is an LTE Advanced feature to send and receive data to and from a UE from several access nodes to ensure the optimum performance is achieved even at cell edges;
2 May dynamically revert to broadcast system info when needed, e.g. system info changes
Serving cluster
Edgeless mobility zone
(area of tightly coordinated cells)
Lightweight mobility for device energy savings
• Apply COMP-like1 concepts to the control plane
• Intra-zone mobility transparent to the device
Less broadcast for network energy savings
• Low periodic beacon for initial discovery of device(s)
• On-demand system info (SIB) when devices present2
Periodic
Sync
SIB request
Transmit
SIB
No SIB request
No SIB
transmission
Natively incorporate solutions to efficiently grow capacity
Delivering enhanced, uniform user experiences
31
Hyper dense
deployments
Full Self-
Configuration
Truly unplanned
deployments
Context and service
awareness
Massive
MIMO
Coordinated
Spatial Techniques
Advanced
Receivers
Beam
formingIntegrated access
and backhaul
mmWave Best use of all
spectrum types
Multicast
Massive Internet of Things
Optimizing to connect anything, anywhere with efficient, low cost communications
32
Power efficient
Multi-year battery life
Low complexity
Low device and network cost
Long range
Deep coverage
Utility meteringSmart homesSmart cities
Remote sensors / Actuators Object trackingWearables / Fitness
Connecting the massive Internet of Things
Key 5G Unified Air Interface design elements
33
Narrow bandwidth to
enable low device
complexity & long range
To improve
uplink coverage—
aided by WAN
For asynchronous
grant-free uplink
transmissions
Optimized waveform
to improve efficiency
& reduce complexity
Control plane
improvements for
better efficiency
Narrow
bandwidth
High
efficiency
waveform
and coding
Non-
orthogonal
RSMA
Managed
multi-hop
mesh
Device-
centric
mobility
Non-orthogonal RSMA for efficient IoT communications
Characterized by small data bursts in the uplink where signaling overhead is a key issue
34
Grant-free transmission of
small data exchanges
• Eliminates signaling overhead for
assigning dedicated resources
• Allows devices to transmit data
asynchronously
• Capable of supporting full
mobility
Increased battery life Scalability to massive # of things Better link budget
Downlink remains OFDM-based for
coexistence with other services
Support for multi-hop mesh with WAN management
Direct access
on licensed
spectrum
1 Greater range and efficiency when using licensed spectrum, e.g. protected reference signals . Network time synchronization improves peer-to-peer efficiency
Problem: uplink coverage Due to low power devices and challenging placements, in e.g. basement
Solution: managed uplink mesh Uplink data relayed via nearby devices—uplink mesh but direct downlink.
Mesh on unlicensed or partitioned
with uplink licensed spectrum1
35
Mission-critical control
Enabling new services with ultra-reliable, ultra-low latency communication links
36
High reliability
Extremely low loss rate
Ultra-low latency
Down to 1ms e2e latency
High resilience
Multiple links for failure tolerance and mobility
Energy / Smart grid
Aviation MedicalIndustrial automation
RoboticsAutonomous vehicles
Delivering mission-critical control services
Key 5G Unified Air Interface design elements
37
Time multiplexing
through puncturing other
service’s TTI
New link adaptation
paradigm for lower link
error rates
Latency-
bounded
link adaptation
Scalable TTI
and lower HARQ
RTT
Enables end-to-end
latency an order of
magnitude lower than LTE
Simultaneous,
redundant
links
Redundancy if primary
link is interrupted
Efficient
multiplexing with
other traffic
Efficient mission-critical multiplexing with other services
A more flexible design as compared to dedicated mission-critical resources (e.g. FDM)
38
Design such that other traffic can sustain
puncturing from mission-critical transmission
Mission-critical transmission
may occur at any time and cannot
wait for scheduling
Nominal traffic
(with new FEC & HARQ design)
Time
Frequency
One TTI
1st
transmission
2st
transmission
Opportunity for uplink RSMA non-orthogonal
access using OFDM waveforms
New 5G design allows for optimal trade-offs
E.g. leveraging wider bandwidths to offset mission-critical capacity reductions
Lower latency
reduces capacity…
…increased reliability
reduces capacity…
…but, wider bandwidth
can offset reductions
Mission-critical
capacity
Mission-critical
capacity
Mission-critical
capacity
Latency Latency Latency
e.g. 1e-4 BLER1
e.g. 1e-2 BLER
Example:
2X bandwidth for 3x capacity gain2
1 Low BLER Block Error Rate, required to achieve high-reliability with a hard delay bound 2 All data based on Qualcomm simulations with approximate graphs and linear scales. 3x gain when increasing from 10Mhz to 20Mhz for 1e-4 BLER. 39
Proposed 5G standardization for 2020 launch
40
R15 5G
work items
5G study items
4G evolution—LTE will evolve in parallel with 5G
R17+
5G evolution
5G
phase 2
R16 5G
work Items
First 5G
launch1
Note: Estimated commercial dates; 1 Forward compatibility with R16 and beyond
3GPP RAN workshop
In parallel: driving 4G and 5G to their fullest potential
Expanding and evolving LTE Advanced – setting the path to 5G
41
4G
LTE LTE Advanced LTE Advanced Pro
5G Carrier
Aggregation
Wi-Fi
5G below 6GHz
5G above 6GHz
Simplifying 5G deployments with multi-connectivity
A phased 5G introduction that fully leverages 4G LTE and Wi-Fi investments
5G/4G/ 3G/ Wi-Fi
multimode deviceSmall cell Macro
4G LTE
5G below 6GHz
4G LTE, LTE Unlicensed & Wi-Fi
4G or 5G
below 6GHz 5G Macro
5G
Above 6GHz
4G Macro
Today: 4G LTE below 6 GHz with Dual Connectivity and LTE-Wi-Fi Link Aggregation
Phase 1 (R15): New 5G radio access below 6 GHz using LTE anchor for mobility management
Phase 2 (R16+): New multi-access 5G core network, new 5G radio access above 6 GHz
5G: not just a new
generation, but a
new kind of network
Connecting
new industries and devices
Enabling
new services
Empowering
new user experiences
For more information: www.qualcomm.com/5G
44
An essential innovator and accelerator of mobile and beyondTM
Machine learning
Computer vision
Always-on sensing
Immersive multimedia
Cognitive connectivity
Intuitive security
Heterogeneous computing
Next level of intelligence
Bringing cognitive
technologies to life
Devices and things that perceive,
reason, and act intuitively
Small cells and self organizing technology
LTE in unlicensed spectrum, MuLTEfire™
LTE Advanced carrier aggregation, dual connectivity
Advanced receivers and interference management
Spectrum innovations like LSA
Wi-Fi – 11ac, 11ad, MU-MIMO, OCE, 11ax
3G
More capacity
Working to solve the
1000x data challenge
Innovative small cells and
spectrum solutions
Creating the connectivity
fabric for everything
Intelligently connect everything/everyone,
empower new services, drive convergence
LTE-M (Machine-Type Communications), NB-IOT
LTE Direct device-to-device
LTE Broadcast
LTE – Wi-Fi Convergence
Wi-Fi – 11ah, 11ad, Wi-Fi Aware, Wi-Fi Direct, DSRC
Bluetooth Smart
OneWeb
5GA new connectivity paradigm
Questions? - Connect with Us
45
@Qualcomm_tech
http://www.slideshare.net/qualcommwirelessevolution
http://www.youtube.com/playlist?list=PL8AD95E4F585237C1&feature=plcp
www.qualcomm.com/wireless
BLOG
www.qualcomm.com/news/onq
For more information, visit us at:
www.qualcomm.com & www.qualcomm.com/blog
©2013-2015 Qualcomm Technologies, Inc. and/or its affiliated companies. All Rights Reserved.
Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries. Why Wait, Snapdragon, VIVE and MuLTEfire are trademarks of
Qualcomm Incorporated. Other product and brand names may be trademarks or registered trademarks of their respective owners.
References in this presentation to “Qualcomm” may mean Qualcomm Incorporated, Qualcomm Technologies, Inc., and/or other subsidiaries or business units within the
Qualcomm corporate structure, as applicable.
Qualcomm Incorporated includes Qualcomm’s licensing business, QTL, and the vast majority of its patent portfolio. Qualcomm Technologies, Inc., a wholly-owned subsidiary
of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm’s engineering, research and development functions, and substantially all of its
product and services businesses, including its semiconductor business, QCT.
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Designing the 5G Unified Air Interface

  • 1. The 5G Unified Air Interface Scalabletoanextremevariationofrequirements November, 2015 Qualcomm Technologies Inc. TM
  • 2. 5G to meet significantly expanding connectivity needs 2 Edgeless For uniform experiences with new ways of connecting Unified Across all spectrum types/bands, services and deployments Scalable To an extreme variation of requirements Empowering new user experiences new industries and devices new services Building on the transformation started in 4G LTE
  • 3. 5G will enhance existing and expand to new use cases 3 Massive Internet of Things Efficient, low cost communications with deep coverage Enhanced Mobile Broadband Faster, more uniform user experiences Mission-Critical Control Ultra-low latency and high reliability Smart homes/ buildings/cities Autonomous vehicles, object tracking Remote control & process automation, e.g. aviation, robotics Critical infrastructure protection & control, e.g. Smart Grid Extreme mobile broadband, e.g. UHD virtual reality Demanding indoor/outdoor conditions, e.g. venues New form factors, e.g. wearables and sensors
  • 4. Scalable across an extreme variation of requirements 4 Massive Internet of Things Mission-critical control Enhanced mobile broadband Deep coverage To reach challenging locations Ultra-low energy 10+ years of battery life Ultra-low complexity 10s of bits per second Ultra-high density 1 million nodes per Km2 Extreme capacity 10 Tbps per Km2 Extreme data rates Multi-Gigabits per second Deep awareness Discovery and optimization Extreme user mobility Or no mobility at all Ultra-low latency As low as 1 millisecond Ultra-high reliability <1 out of 100 million packets lost Strong security e.g. Health /government/ financial trusted Based on target requirements for the envisioned 5G use cases
  • 5. A new 5G unified air interface is the foundation 5 FDD, TDD, half duplex Licensed, shared licensed, and unlicensed spectrum Spectrum bands below 1 GHz, 1 GHz to 6 GHz, & above 6 GHz (incl. mmWave) Device-to-device, mesh, relay network topologies From wideband multi-Gbps to narrowband 10s of bits per second Efficient multiplexing of mission-critical and nominal traffic From high user mobility to no mobility at all From wide area macro to indoor / outdoor hotspots Diverse spectrum Diverse services and devices Diverse deployments Unified air interface
  • 6. Designing the 5G Unified Air Interface A new PHY & MAC design that is scalable to an extreme variation of requirements 6 Optimized OFDM-based waveforms With scalable numerology and TTI, plus optimized multiple access for different use cases A common, flexible framework To efficiently multiplex services and features—designed for forward compatibility Advanced wireless technologies Such as massive MIMO, robust mmWave and a flexible self-contained TDD design
  • 7. Designing optimized waveforms & multiple access with heavy reliance on OFDM 7
  • 8. Helps achieve better frequency localization Transmitted Waveform after windowing IFFT outputCP Time Data transmitted via closely-spaced, narrowband subcarriers – IFFT operation ensures subcarriers do not interfere Bandwidth Helps maintain orthogonality despite multipath fading CP Time IFFT/FFT is the foundation to OFDM Quick refresh on Orthogonal Frequency Division Multiplexing 8 Simplified OFDM waveform synthesis for a transmitter Data Serial to Parallel IFFT Cyclic Prefix (CP) Insertion Windowing /Filtering 0s 0s To RFCoding & Modulation OFDM-based waveforms highly utilized in e.g. LTE and Wi-Fi systems today
  • 9. OFDM family well suited to meet 5G requirements Wide bandwidth, high capacity, low latency, low complexity per bit 9 Scalable To wide bandwidths with scalable symbol duration and subcarrier spacing Low Complexity Does not require complex receivers even when scaling to wide bandwidths Efficient for MIMO Elegant framework for MIMO spatial multiplexing that scales to wider bandwidths MIMO Scalable sub-carrier spacing Scalable bandwidth Higher spectral efficiency
  • 10. The OFDM family allows for enhancements To address different use cases—a key focus for 5G 10 Support for asynchronous, grant- free multiple access such as Resource Spread Multiple Access Additional OFDM windowing/filtering reduces both inter-symbol1 and inter-channel2 interference Add DFT spreading to achieve a single-carrier OFDM signal with smaller power variations Frequency localization To reduce in-band and out-of-band emissions Uplink energy efficiency Due to power variations on a per OFDM subcarrier basis Asynchronous uplink To support sporadic uplink transmissions of small data bursts Such as for massive IoT zzz zzz zzz Especially in macro deployments 1 Among users within allocated band; 2 among neighboring operators, e.g. low Adjacent-Channel Leakage Ratio (ACLR)
  • 11. Numerous OFDM-based waveforms considered for 5G 11 UFMC2 Customized filtering over a block of contiguous OFDM subcarriers2 FBMC / GFDM3 Customized subcarrier pulse shaping achieved through oversampling4 Zero-tail SC-OFDM DFT spreading with dynamic zero-pad instead of fixed CP for higher spectral efficiency 1 Time domain windowing heavily used in commercial LTE systems, but not specified in 3GPP standard; 2 Universal Filtered Multi-Carrier; 3 Filter Bank Multi-Carrier and Generalized Frequency Division Multiplexing IFFT/FFT All waveforms based on OFDM Synthesis CP-OFDM with windowing1 Time domain windowing to soften edges of symbols—used in 4G LTE downlink today SC-OFDM with windowing1 DFT spreading with cyclic prefix (CP) insertion—used in 4G LTE uplink today Multi-carrier OFDM waveforms OFDM variants with windowing/filtering enhancements for better frequency localization Single-carrier OFDM waveforms Single-carrier OFDM variants that use DFT spreading to reduce power variations in uplink
  • 12. CP-OFDM & SC-OFDM with windowing most optimal Alternative proposals add complexity—radio design, multiplexing—with marginal benefits 121 Due to non-linearity in practical receiver implementations; Qualcomm Research is a division of Qualcomm Technologies, Inc. UFMC GFDM FBMC • Best frequency localization (marginalized in practical systems1) • Requires complex modulation • Integration with MIMO non-trivial • Better frequency localization than CP-OFDM (equivalent to CP-OFDM with windowing) • High Tx and Rx (2x FFT size) complexity • No CP – interference from multipath fading • Better frequency localization than CP-OFDM (equivalent to CP-OFDM with windowing) • Complicated receiver to handle interference • Requires large guardband to multiplex services Pros Cons Download Qualcomm Research whitepaper for detailed analysis: www.qualcomm.com/documents/5g-waveform-multiple-access-techniques Zero-tail SC-OFDM • Marginal spectral efficiency gains • Better OOB suppression with synchronization • Requires extra signaling that adds complexity • Non-trivial to multiplex with OFDM Multi-carrier alternatives Single-carrier alternatives
  • 13. Non-orthogonal, Distributed Scheduling Different multiple access schemes for different use cases 13 OFDMA & SC-FDMA for mobile broadband and beyond Utilizes CP-OFDM and SC-OFDM waveforms respectively OFDMA well suited for spectrally efficient large data transmissions SC-FDMA well suited for efficient UL transmissions in macro deployments Orthogonal, Centralized Scheduling Resource Spread Multiple Access (RSMA) for target use cases Enables asynchronous, non-orthogonal, contention-based access well suited for e.g. IoT UL Spreads bits through low rate coding1 across resource elements in time or frequency Signals may occupy same resources—separate with different e.g. scrambling codes 1 As opposed to legacy Code Division Multiple Access (CDMA) schemes which attempted to orthogonalize users with e.g. Walsh codes Frequency Time Time Frequency
  • 14. Optimized 5G waveforms and multiple access With heavy reliance on the OFDM family 14 5G Downlink A single waveform for flexible service multiplexing 5G Uplink Optimized waveforms for different use cases CP-OFDM1 + OFDMA Also recommended for D2D & basestation-to-basestation communications to maximize transmit/receiver design reuse SC-OFDM1 + SC-FDMA To maximize device energy efficiency Macro coverage CP-OFDM1 + OFDMA To maximize spectral efficiency Small cells Low energy single-carrier2 + RSMA For energy efficient small data bursts Massive IoT Mission- critical CP-OFDM/SC-OFDM1 + RSMA3 For low latency, grant-less small data bursts 1 With time domain windowing as common in LTE systems today; 2 Such as SC-FDE and GMSK; 3 May also use OFDMA/SC-FDMA for applications that may be scheduled Download Qualcomm Research whitepaper for detailed analysis: www.qualcomm.com/documents/5g-waveform-multiple-access-techniques
  • 15. Designing a flexible framework to multiplex envisioned & unknown 5G services 15
  • 16. Unified 5G design across spectrum types and bands 16 Licensed Spectrum Cleared spectrum EXCLUSIVE USE Unlicensed Spectrum Multiple technologies SHARED USE Shared Licensed Spectrum Complementary licensing SHARED EXCLUSIVE USE Below 1 GHz: longer range for massive Internet of Things 1 GHz to 6 GHz: wider bandwidths for enhanced mobile broadband and mission critical Above 6 GHz, e.g. mmWave: extreme bandwidths, shorter range for extreme mobile broadband
  • 17. Scalable numerologies to meet diverse deployments From narrowband to wideband, licensed & unlicensed, TDD & FDD 17 Sub-carrier spacing = N (extended cyclic prefix) Outdoor and macro coverage FDD/TDD <3 GHz e.g. 1, 5, 10 & 20 MHz Indoor wideband TDD e.g. 5 GHz (Unlicensed) e.g. 160MHz Sub-carrier spacing = 8N mmWave TDD e.g. 28 GHz Sub-carrier spacing = 2N (normal cyclic prefix) Outdoor and small cell TDD > 3 GHz e.g. 80 MHz e.g. 500MHz Sub-carrier spacing = 16N Example usage models and channel bandwidths
  • 18. Blank subcarriers Scalable TTI WAN Blank subframes D2D Multicast A flexible framework with forward compatibility Designed to efficiently multiplex envisioned & unforeseen 5G services on the same frequency 18 Integrated framework That can support diverse deployment scenarios and network topologies Scalable transmission time interval (TTI) For diverse latency requirements—capable of latencies an order of magnitude lower than LTE Mission-critical transmissions May occur at any time; design such that other traffic can sustain puncturing1 Forward compatibility With support for blank subframes and frequency resources for future services/features 1 Nominal 5G access to be designed such that it is capable to sustain puncturing from mission-critical transmission or bursty interference
  • 19. Scalability to much lower latency 19 Scalable TTI for diverse latency & QoS requirements TTI Longer TTI for higher spectral efficiency Shorter TTI for low latency 1 Compared to LTE’s 8 HARQ interlaces Order of magnitude lower Round-Trip Time (RTT) than LTE today 0 1 0 1 ACK0 Data ACK ACK1 ACK0 FDD TDD HARQ RTT TTI Self-contained design reduces RTT Fewer (variable) interlaces for HARQ1 Scalable TTI Example: TDD downlink Guard Period ACK (Rx) Ctrl (Tx) Data (Tx) Data and acknowledgement in the same subframe
  • 20. Self-contained TDD subframe design Faster, more flexible TDD switching & turn around, plus support for new deployment scenarios 20 Unlicensed spectrum Listen-before-talk headers e.g. clear Channel Assessment (CCA) and hidden node discovery Massive MIMO Leveraging channel reciprocity in UL transmission for DL beamforming training D2D, mesh and relay Headers for e.g. direction of the link for dynamic distributed scheduling Self-contained TDD sub-frame: UL/DL scheduling info, data and acknowledgement in the same sub-frame GuardPeriod Add’l headers ACK (Rx) Ctrl (Tx) Data (Tx) Adaptive UL/DL configuration Flexible capacity allocation; also dynamic on a per-cell basis Example: TDD downlink
  • 21. Designing Forward Compatibility into 5G Flexibly phase in future features and services 21 Blank resources1 Enable future features/service to be deployed in the same frequency in a synchronous and asynchronous manner Service multiplexing E.g. nominal traffic designed to sustain puncturing from mission-critical transmissions or bursty interference Common frame structure Enable future features to be deployed on a different frequency in a tightly integrated manner, e.g. 5G sub 6 GHz control for mmWave 5G below 6GHz 5G above 6GHz 1 ‘Blank’ resources may still be utilized , but designed in a way to not limit future feature introductions WAN Multicast Blank subframes Blank subcarriers D2D WAN WAN Mission-critical
  • 23. Natively incorporate advanced wireless technologies Key 5G design elements across services 23 Massive Internet of Things Efficient, low cost communications Mission-Critical Control Ultra-low latency and high reliability links Unified Air Interface Enhanced Mobile Broadband Faster, more uniform user experiences • Scalable to wider bandwidths • Designed for all spectrum types • Massive MIMO • Robust mmWave design • Improved network/signaling efficiency • Native HetNets & multicast support • Opportunistic carrier/link aggregation • Low complexity, narrow bandwidth • Low energy waveform • Optimized link budget • Decreased overheads • Managed multi-hop mesh • Ultra-low latency bounded delay • Optimized PHY/pilot/HARQ • Efficient multiplexing with nominal • Simultaneous, redundant links • Grant-free transmissions
  • 24. Enhanced mobile broadband Ushering in the next era of immersive experiences and hyper-connectivity 24 UHD video streaming Broadband ‘fiber’ to the home Virtual realityDemanding conditions, e.g. venues Tactile Internet3D/UHD video telepresence Extreme throughput multi-gigabits per second Ultra-low latency down to 1ms e2e latency Uniform experience with much more capacity
  • 25. For diverse spectrum bands/types and deployment models Tight integration with sub 6 GHz, e.g. carrier aggregation Lower latency and TDD dynamic interference management Capacity and coverage enhancements for higher spectrum bands Common framework for different spectrum types Control plane improvements for better efficiency Scalable OFDM numerology Massive MIMO Flexible FDD/TDD subframe design Reliable, high capacity mmWave Fair sharing of spectrum Device- centric mobility Scaling up to enhance mobile broadband Key 5G Unified Air Interface design elements 25
  • 26. Massive MIMO at 4 GHz allows reuse of existing sites Leverage higher spectrum band using same sites and same transmit power 26Source: Qualcomm simulations; Macro-cell with 1.7km inter-site distance, 10 users per cell, 46 dBm Tx power at base station,, 20MHz@2GHz and 80MHz@4GHz BW TDD, 2.4x Massive MIMO – detailed simulation data available in the appendix Cell edge user throughput 2GHz 2x4 MIMO 20MHz 2.7Y 4GHz 2x4 MIMO 80MHz 10.5Y 4GHz 24x4 Massive MIMO 80MHz Median user throughput X 2GHz 2x4 MIMO 20MHz 3.4X 4GHz 2x4 MIMO 80MHz 13.9X 4GHz 24x4 Massive MIMO 80MHz Macro site 1.7km inter-site distance Y
  • 27. Realizing the mmWave opportunity for mobile broadband 27 Smart beamforming & beam tracking Increase coverage & provide seamless connectivity Solutions mmWave sub6Ghz Tight interworking with sub 6 GHz Increase robustness and faster system acquisition Phase noise mitigation in RF components For low cost, low power devices The extreme mobile broadband opportunity The challenge—‘mobilizing’ mmWave • Large bandwidths, e.g. 100s of MHz • Multi-Gpbs data rates • Flex deployments (integrated access/backhaul) • High capacity with dense spatial reuse • Robustness due to high path loss and susceptibility to blockage • Device cost/power and RF challenges at mmWave frequencies
  • 28. Making mmWave a reality for mobile Qualcomm Technologies is setting the path to 5G mmWave 28 60 GHz chipset commercial today For mobile devices, notebooks and access points Qualcomm ® VIVE™ 802.11ad technology for the Qualcomm® Snapdragon™ 810 processor operates in 60 GHz band with a 32-antenna array element Qualcomm VIVE is a product of Qualcomm Atheros, Inc.; Qualcomm Snapdragon is a product of Qualcomm Technologies, Inc. Developing 5G mmWave For extreme mobile broadband both outdoor and indoor 28 GHz outdoor example with ~150m dense urban LOS and NLOS coverage using directional beamforming1 Manhattan 3D Map * Results from ray-tracing1 1 Based on Qualcomm Simulations
  • 29. Unlicensed spectrum with licensed anchor channel Shared licensed spectrum solutions Pure unlicensed spectrum Making the best use of all spectrum types 29 LTE-U and LAA Licensed shared access (LSA) and similar MuLTEfire™ Introduced in 4G LTE Efficiently designed for all spectrum types from the beginning Fair coexistence across all spectrum types Aggregation across spectrum types and bands To efficiently grow data capacity
  • 30. Device-centric mobility management in 5G Control plane improvements to improve energy and overhead efficiency 30 1 Coordinated MultiPoint is an LTE Advanced feature to send and receive data to and from a UE from several access nodes to ensure the optimum performance is achieved even at cell edges; 2 May dynamically revert to broadcast system info when needed, e.g. system info changes Serving cluster Edgeless mobility zone (area of tightly coordinated cells) Lightweight mobility for device energy savings • Apply COMP-like1 concepts to the control plane • Intra-zone mobility transparent to the device Less broadcast for network energy savings • Low periodic beacon for initial discovery of device(s) • On-demand system info (SIB) when devices present2 Periodic Sync SIB request Transmit SIB No SIB request No SIB transmission
  • 31. Natively incorporate solutions to efficiently grow capacity Delivering enhanced, uniform user experiences 31 Hyper dense deployments Full Self- Configuration Truly unplanned deployments Context and service awareness Massive MIMO Coordinated Spatial Techniques Advanced Receivers Beam formingIntegrated access and backhaul mmWave Best use of all spectrum types Multicast
  • 32. Massive Internet of Things Optimizing to connect anything, anywhere with efficient, low cost communications 32 Power efficient Multi-year battery life Low complexity Low device and network cost Long range Deep coverage Utility meteringSmart homesSmart cities Remote sensors / Actuators Object trackingWearables / Fitness
  • 33. Connecting the massive Internet of Things Key 5G Unified Air Interface design elements 33 Narrow bandwidth to enable low device complexity & long range To improve uplink coverage— aided by WAN For asynchronous grant-free uplink transmissions Optimized waveform to improve efficiency & reduce complexity Control plane improvements for better efficiency Narrow bandwidth High efficiency waveform and coding Non- orthogonal RSMA Managed multi-hop mesh Device- centric mobility
  • 34. Non-orthogonal RSMA for efficient IoT communications Characterized by small data bursts in the uplink where signaling overhead is a key issue 34 Grant-free transmission of small data exchanges • Eliminates signaling overhead for assigning dedicated resources • Allows devices to transmit data asynchronously • Capable of supporting full mobility Increased battery life Scalability to massive # of things Better link budget Downlink remains OFDM-based for coexistence with other services
  • 35. Support for multi-hop mesh with WAN management Direct access on licensed spectrum 1 Greater range and efficiency when using licensed spectrum, e.g. protected reference signals . Network time synchronization improves peer-to-peer efficiency Problem: uplink coverage Due to low power devices and challenging placements, in e.g. basement Solution: managed uplink mesh Uplink data relayed via nearby devices—uplink mesh but direct downlink. Mesh on unlicensed or partitioned with uplink licensed spectrum1 35
  • 36. Mission-critical control Enabling new services with ultra-reliable, ultra-low latency communication links 36 High reliability Extremely low loss rate Ultra-low latency Down to 1ms e2e latency High resilience Multiple links for failure tolerance and mobility Energy / Smart grid Aviation MedicalIndustrial automation RoboticsAutonomous vehicles
  • 37. Delivering mission-critical control services Key 5G Unified Air Interface design elements 37 Time multiplexing through puncturing other service’s TTI New link adaptation paradigm for lower link error rates Latency- bounded link adaptation Scalable TTI and lower HARQ RTT Enables end-to-end latency an order of magnitude lower than LTE Simultaneous, redundant links Redundancy if primary link is interrupted Efficient multiplexing with other traffic
  • 38. Efficient mission-critical multiplexing with other services A more flexible design as compared to dedicated mission-critical resources (e.g. FDM) 38 Design such that other traffic can sustain puncturing from mission-critical transmission Mission-critical transmission may occur at any time and cannot wait for scheduling Nominal traffic (with new FEC & HARQ design) Time Frequency One TTI 1st transmission 2st transmission Opportunity for uplink RSMA non-orthogonal access using OFDM waveforms
  • 39. New 5G design allows for optimal trade-offs E.g. leveraging wider bandwidths to offset mission-critical capacity reductions Lower latency reduces capacity… …increased reliability reduces capacity… …but, wider bandwidth can offset reductions Mission-critical capacity Mission-critical capacity Mission-critical capacity Latency Latency Latency e.g. 1e-4 BLER1 e.g. 1e-2 BLER Example: 2X bandwidth for 3x capacity gain2 1 Low BLER Block Error Rate, required to achieve high-reliability with a hard delay bound 2 All data based on Qualcomm simulations with approximate graphs and linear scales. 3x gain when increasing from 10Mhz to 20Mhz for 1e-4 BLER. 39
  • 40. Proposed 5G standardization for 2020 launch 40 R15 5G work items 5G study items 4G evolution—LTE will evolve in parallel with 5G R17+ 5G evolution 5G phase 2 R16 5G work Items First 5G launch1 Note: Estimated commercial dates; 1 Forward compatibility with R16 and beyond 3GPP RAN workshop
  • 41. In parallel: driving 4G and 5G to their fullest potential Expanding and evolving LTE Advanced – setting the path to 5G 41 4G LTE LTE Advanced LTE Advanced Pro
  • 42. 5G Carrier Aggregation Wi-Fi 5G below 6GHz 5G above 6GHz Simplifying 5G deployments with multi-connectivity A phased 5G introduction that fully leverages 4G LTE and Wi-Fi investments 5G/4G/ 3G/ Wi-Fi multimode deviceSmall cell Macro 4G LTE 5G below 6GHz 4G LTE, LTE Unlicensed & Wi-Fi 4G or 5G below 6GHz 5G Macro 5G Above 6GHz 4G Macro Today: 4G LTE below 6 GHz with Dual Connectivity and LTE-Wi-Fi Link Aggregation Phase 1 (R15): New 5G radio access below 6 GHz using LTE anchor for mobility management Phase 2 (R16+): New multi-access 5G core network, new 5G radio access above 6 GHz
  • 43. 5G: not just a new generation, but a new kind of network Connecting new industries and devices Enabling new services Empowering new user experiences For more information: www.qualcomm.com/5G
  • 44. 44 An essential innovator and accelerator of mobile and beyondTM Machine learning Computer vision Always-on sensing Immersive multimedia Cognitive connectivity Intuitive security Heterogeneous computing Next level of intelligence Bringing cognitive technologies to life Devices and things that perceive, reason, and act intuitively Small cells and self organizing technology LTE in unlicensed spectrum, MuLTEfire™ LTE Advanced carrier aggregation, dual connectivity Advanced receivers and interference management Spectrum innovations like LSA Wi-Fi – 11ac, 11ad, MU-MIMO, OCE, 11ax 3G More capacity Working to solve the 1000x data challenge Innovative small cells and spectrum solutions Creating the connectivity fabric for everything Intelligently connect everything/everyone, empower new services, drive convergence LTE-M (Machine-Type Communications), NB-IOT LTE Direct device-to-device LTE Broadcast LTE – Wi-Fi Convergence Wi-Fi – 11ah, 11ad, Wi-Fi Aware, Wi-Fi Direct, DSRC Bluetooth Smart OneWeb 5GA new connectivity paradigm
  • 45. Questions? - Connect with Us 45 @Qualcomm_tech http://www.slideshare.net/qualcommwirelessevolution http://www.youtube.com/playlist?list=PL8AD95E4F585237C1&feature=plcp www.qualcomm.com/wireless BLOG www.qualcomm.com/news/onq
  • 46. For more information, visit us at: www.qualcomm.com & www.qualcomm.com/blog ©2013-2015 Qualcomm Technologies, Inc. and/or its affiliated companies. All Rights Reserved. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries. Why Wait, Snapdragon, VIVE and MuLTEfire are trademarks of Qualcomm Incorporated. Other product and brand names may be trademarks or registered trademarks of their respective owners. References in this presentation to “Qualcomm” may mean Qualcomm Incorporated, Qualcomm Technologies, Inc., and/or other subsidiaries or business units within the Qualcomm corporate structure, as applicable. Qualcomm Incorporated includes Qualcomm’s licensing business, QTL, and the vast majority of its patent portfolio. Qualcomm Technologies, Inc., a wholly-owned subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm’s engineering, research and development functions, and substantially all of its product and services businesses, including its semiconductor business, QCT. Thank you Follow us on: 46