5g air interface - interdigital

© 2018 InterDigital, Inc. All Rights Reserved.© 2018 InterDigital, Inc. All Rights Reserved.

5G Air InterfaceEnhanced Mobile Broadband with Millimeter Wave

Enhanced Mobile Broadband (eMBB)A Founda)on for 5G Performance

© 2018 InterDigital, Inc. All Rights Reserved.2

Source: etsi.org

5G millimeter wave air interface technology addresses eMBB KPIs

Enhanced MobileBroadband

Peak data rate

User experienceddata rate

Area trafficcapacity

Spectrumefficiency

Networkenergy efficiency

Mobility

Connec)on density Latency

Massive MachineType Communica)on

Ultra-Reliable and LowLatency Communica)on

5G Non-Standalone Architecture

3

mmW – LTE integration is a foundation for initial deployments

3GPP Non-standalone (NSA) “LTE Assisted” Option 3A 3GPP Release 15

3GPP Standalone (SA) OpBon 2 3GPP Release 15 (June 2018)

3GPP NAS/ “LTE Assisted” OpBon 3A

EPC

eNB gNB

NGC

gNB

NG-UNG-CS1-C S1-U

© 2018 InterDigital, Inc. All Rights Reserved.

x

5G Air Interface Millimeter Wave (mmW) and LTE Demo

Featured Technologies• mmW integration with LTE in non-standalone mode

• mmW indoor mobility• mmW beam management

• Beam acquisition and beam pairing• Beam switching to support low mobility terminals• Beam pairing in both the downlink and uplink

• Sub-6 GHZ LTE data and control plane overlay• mmW data plane fallback to LTE data plane

User experience• Video streaming application which showcases dual RAT

data plane mmW and LTE • 4K video over mmW link vs. low-resolution video over LTE


mmWBS eNBBeam switching

LTE Link

UE Agent

Data and Control Plane Architecture


LTE data plane switch handled by UE agent and BS agents

LTE control plane carries mmW measurements to access manager

DASH video server will send a low resoluAon video stream over the LTE link in order to show a noAceable change in video resoluAon

Media Server

EthernetEPC BS SWITCH

L2

Ethernet

Data flow over LTEData flow over mmWData flow over Ethernet

LTE-UE

UE Switch L2

LTE Link

mmW BS

eNB

Legend

mmW UE

mmW Link

Note: Only one flow is acAve at a Ame (i.e. either over LTE or mmW link)

User Host

Media Server

EthernetEPC

Ethernet

Access Mgr/UE/BS AgentLTE Control Plane OverlaymmW BS Control Path

LTE-UE

UE Switch L2LTE Link mmW BS

eNB

Legend

mmW UE

mmW Link

User Host

Access Manager

BS Agent

BS SWITCHL2

Open Air Interface Alliance LTE and mmW 5G NR

InterDigital is an Associate member of the Open Air Interface Alliance developing software defined PHY/MAC functionality for 5G NR


LTE virtual core network and eNB funcKons are integrated with mmW in the demo

eNB Computer EPC Computer

hss

mme

spgw

Ite-softmodemUSRP CLOUD

OAI SoPware App

Hardware

USB3 Ethernet EthernetLTE

60GHz PAA Module


RX/TX Antennas are planar arrays of 4x8 elements each•Transceiver ICs (PRS1126) are placed between TX and RX antennas•Beam steering is performed in the horizontal plane by varying •steering angle θS

Key Radio SpecsRadio Arch.

RF Band Ref Clock

Mode

Duplex Spacing CH BW

PLL Phase Noise: Rx Conv. Gain

EVMAGC Range

PAA with 8x PRS1126, driving 8x [4x1] patch antennas57GHz to 64GHz (centered at 802.11ad channels)

45MHz (TCXO)

Primary mode - TDD (each TRX in either Tx or Rx mode only)(OpMonal) Secondary mode – FDD[1-4] TX & [1-4] RX (with Tx CH ≠ Rx CH)

2 to 4GHz (adjacent or alternate channel)

up to 250MHz (or 500MHz RF) due to sampling rate limita[ons,i.e., usage limited to a frac[on of available 802.11ad CH<7 degrees RMS>70dB-21dB65dB (as per PRS1126 spec)

mmW BS/Terminal Pla/orm


mmW access BS or terminal•Pla2orm supports 2 PAA modules, each •with 8 radios

1 PAA module per terminal •

Pla2orm supports 16 complex digital •streams, 8 for each PAAEach digital stream can operate at a •maximum sampling rate of 500MHz

RF BW 400MHz•QPSK, 16QAM•User data rate @16QAM, 270Mbps •

HTG-830FPGA Board

Converter Board PAA 1

JESDCore

...

JESDCore

...

(x16)

(x16)

ModemSubsystem PAA 2

FMC Conn 1

FMC Conn 2

PAA Conn 1PAA Conn 2

PAA Conn 1PAA Conn 2

Expansion Header

x4 ADCs

x4 DACs

(x4)

(x4)

Leve

l Tra

nsla

tors

x4 ADCs

x4 DACs

(x4)

(x4)

Leve

l Tra

nsla

tors

LEDs

OSC

TPs

Temp

REF ClockDistribu^on

HS ClockDistribu^on

Peraso

(x4)

Peraso

(x4)

Peraso

(x4)

Peraso

(x4)

Cntl

Data

+12 Pwr Conn +12 Pwr Conn

+12V Power Supply

TX Ant RX Ant

TX Ant RX Ant(x8) (x8)

(x8) (x8)

A Pla&orm for System Analysis and Research

Ini$al Access (IA)•IA latency increases with increasing array size•Beam management protocols addressed in 3GPP •NR to reduce overhead, power and latencyDigital beamforming can further reduce latency •over analog


These results are a result of a research collabora$on between InterDigital and University of Padua/Consorzio Futuro in Ricerca. Ref.: M. Giordani, M. Polese, A. Roy, D. Castor and M. Zorzi “Beam Management Frameworks for 3GPP New Radio at mmWave Frequencies,” NSF mmW RCN, Jan. 2018.

Radio Link Failure (RLF) •mmW connec$on may result in more frequent RLF due to •severe non-line-of-sight lossesRLF detec$on performance is superior in a Non• -Standalone architecture (LTE-Overlay) as compared to Stand-Alone (SA)Digital beamforming can improve RLF reac$veness•

Digital beamforming is a promising further improvement for future mmW architectures

mmW Beamforming User Interface

Average and con,nuous throughput •measurements Display beam selec,on pairing •between mmW BS and mmW terminal as a func,on of posi,on on trackLTE status monitor•User control of a motorized •track-slow down, speed up, reverseReceived SNR measurements from •each of 8 beams


5g air interface - interdigital

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