The Vault

MWC17: 5G Access
Presentation / Mar 2017 / IDmwc17, 5g

InterDigital's Mobile World Congress 2017 presentation on 5G Access.

? 2017 InterDigital, Inc. All rights reserved. 5G Access InterDigital 5G Access 2 ? 2017 InterDigital, Inc. All rights reserved. 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 Wireless Access Dual 32 Element 60 GHz Phased Array 5G 70 GHz Low-latency Demo 5G Access Requirements and Use Cases 3 ? 2017 InterDigital, Inc. All rights reserved. ? 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) 4G LTE-A Relay 5G ?Fast Forward? 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 5 ? 2017 InterDigital, Inc. All rights reserved. Latency Comparisons LTE-A vs. 5G Fast-Forward Over 80x improvement with mmWave Fast Forward 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 Ethernet SW Laptop Control Application and GUI Relay Device Relay Device PCP/AP End Point Ethernet Switch Laptop Client 72 .5 GH z70.5GHz 71.5GHz Serial control and statistics Serial control and statistics 6 ? 2017 InterDigital, Inc. All rights reserved. Simulation Results for Latency (A Comparison of Techniques) 7 ? 2017 InterDigital, Inc. All rights reserved. ? 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 Inflection point where errors begin to impact latency Selective CW Retransmission shows best performance 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 by more retransmissions MCS5 has less code words and smaller packets than MCS2 Low Latency Multi-hop Lab Bench 9 ? 2017 InterDigital, Inc. All rights reserved. ? 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 hop statistics Real Time Latency Statistics 10 ? 2017 InterDigital, Inc. All rights reserved. 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 11 ? 2017 InterDigital, Inc. All rights reserved. 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 fast acquisition ? MU-MIMO for higher capacity and low latency ? Inter- and intra-face full duplex ? Polarization based SU-MIMO and link adaptation 12 ? 2017 InterDigital, Inc. All rights reserved. HORIZONTAL PLANE The beam steering is performed in the horizontal plane by varying the steering angle ?S. RX A NT EN NA TX A NT EN NA PAA Module (60-65GHz) ? 4x8 Antenna Layout 13 ? 2017 InterDigital, Inc. All rights reserved. dY=2.4 cm dX=1 cm BOTTOM SIDE COMPONENT and FEEDING LINE Layer TOP SIDE Patch Antenna Layer d=0.6*? ? 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 14 ? 2017 InterDigital, Inc. All rights reserved. Dual and Single PAA configurationBackside of PAA 8x60GHz ICs Radiating side of PAA Tx antenna on bottom Rx Antenna on top