MWC17: 5G Access
InterDigital's Mobile World Congress 2017 presentation on 5G Access.
? 2017 InterDigital, Inc. All rights reserved.
InterDigital 5G Access
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Our 5G millimeter wave access technology is focusing on delivering high capacity and
low-latency for Ultra Dense Networks (UDN) and fixed wireless access.
From 5G prototypes to 5G standards
EdgeLink? for 5G 60GHz Fixed
Dual 32 Element 60 GHz
5G 70 GHz Low-latency Demo
5G Access Requirements and Use Cases
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? 5G access technology is aimed to meet the
1000x more data demands, 100x more
connected devices and 5x lower latency
? Networks will require smaller nodes to
connect together in close proximity using
either mesh or other topologies
? Many more hops will be needed in order to
carry user traffic through the mobile network
before ultimately reaching the internet
? InterDigital has been developing solutions
which will increase capacity, increase
reliability and reduce latency as part of our 5G
technology development roadmap
Low-Latency Protocol for Access and Backhaul
5G Targeted Low-Latency Use Cases
Use Cases: Low Latency
Fronthaul/RAN Functional Split (e.g. C-RAN) ???
Industrial Automation/Mobile Cloud Robotics ???
Use Cases for the Tactile Internet ????
Intelligent Transport Systems (V2V and V2I) ???
Low-Latency Trading ????
Distributed Computing / Inter-Processor Comm. ????
4 ? 2017 InterDigital, Inc. All rights reserved.
Reducing multi-hop wireless latency across both access and backhaul is a key technology area.
1. mmW cell densification will increase
due to mmW propagation losses
compared to sub-6GHz systems
2. ??Densification has the potential to
significantly increase operators?
installation costs due, in part, to a large
increase in backhaul installations
3. However, using multi-hop backhaul links
can negatively impact end-to-end
latencies, another key 5G metric
Today?s wireless communication is designed for delivering content, the next generation of wireless
networks will enable real-time manipulation of sensors and machines (i.e. Tactile Internet)
Time through transmit side end device (Receive from network switch, encapsulate
Ethernet frame, Tx complete packet) 3,000 45
Time through a relay node and air link assuming radio
resources are available 3,000 20
Time through receive side end device (Rx complete packet,
de-capsulate Ethernet frame, send to network switch) 3,000 55
TOTAL (For 2 end devices+ 2 ?relays?) 12,000 uS 140 uS
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Latency Comparisons LTE-A vs. 5G Fast-Forward
Over 80x improvement
with mmWave Fast
Fast Forwarding Reference Platform
? Dedicated channels for simultaneous UL & DL
? 4 platform nodes being demonstrated are using TDD
? Two applications simultaneously running, one normal & one FF, demonstrating the benefits of Fast Forward technology
Application and GUI
Relay Device Relay Device
PCP/AP End Point Ethernet Switch
Serial control and statistics
Serial control and statistics
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Simulation Results for Latency (A Comparison of Techniques)
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? Various Fast Forward techniques developed by InterDigital enable latency reduction trade-offs with complexity
? By decomposing Packets into Code Words, significant latency reduction is achieved by only retransmitting
corrupted Code Words
errors begin to
Simulation Results: Throughput (A Comparison of Techniques)
8 ? 2017 InterDigital, Inc. All rights reserved.
? Fast Forward techniques improve overall throughput, by limiting the amount of retransmissions that occur
? Best overall throughput is achieved by attaching CRCs to individual Code Words
T-Put is impacted
MCS5 has less
code words and
Low Latency Multi-hop Lab Bench
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? Laptop/Server runs applications
(IPERF/Video) and generates packets
? Packets are provided to the system
over Ethernet with variable sizes
? Fast Forward and Normal packets are
differentiated by IP address
? GUI shows real time end delay of Fast
Forward and Normal Packets and per
Real Time Latency Statistics
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System Tab -
? Uplink and downlink end to end packet delay for
normal and fast forwarded packets over time
? Data rates along with modulation type, code
rate and individual delays through each node
Status Tab -
? Current per node delay for FF and normal packets
? Constellation pattern of selected node
? Channel estimates of each downlink link
PAA Module ? 60GHz
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60 GHz Phase Array Assembly
? InterDigital has developed a versatile
and low cost 4x8 Phase Array
Assembly (PAA), using commercial
WiGig 60GHz transceivers.
? PAA technology is an essential
element for mmW 5G.
? Narrow beam tracking
? Multiple simultaneous beams for
? MU-MIMO for higher capacity
and low latency
? Inter- and intra-face full duplex
? Polarization based SU-MIMO and
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The beam steering is performed in the horizontal plane by varying the
steering angle ?S.
PAA Module (60-65GHz) ? 4x8 Antenna Layout
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FEEDING LINE Layer
Patch Antenna Layer
? Manufactured using Droid 5880
? Low moisture absorption
? Good isotropic properties
? Uniform electrical properties over frequency
? About 20dBi gain in main direction
? About 3dB variation within +/-45 deg steering angle
? Good side lobe suppression
? BW (3dB)> 7GHz
60 GHz PAA module - 8x PRS1126 TRxs and 4x8 antenna
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Dual and Single PAA configurationBackside of PAA
Radiating side of PAA
Tx antenna on bottom
Rx Antenna on top