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USRP 5G Product Update

Tom Tsou

Ettus Research

5th OAI Workshop, Beijing China

June 22, 2018

Agenda

● USRP product update

● Application to 5G-NR

● Feature: Synchronization over Ethernet

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Product Updates

USRP N3XX Family

Zynq user-programmable FPGAs Dual-Core ARM Cortex-A9 processor SW features focused on remote device

management and reliability 10 GigE SFP streaming Ethernet-based White Rabbit

synchronization Open-source SW development

4x4 MIMO in half wide RU form factor 10 MHz – 6 GHz RF frequency range 100 MHz of instantaneous BW per channel Zynq 7100/7035 user-programmable FPGA Dual-Core ARM Cortex-A9 processor 2 SFP+ ports (1 GbE, 10 GbE) Ethernet sync with White Rabbit Self reset – watchdog timer

Ettus Research USRP N310Released March 2018

Applications Wireless testbeds Remote radio heads Comms system prototyping Spectrum monitoring Record/Playback Spectrum sharing (e.g. CBRS)

Benefits Highest channel density in a USRP Stand-alone operation Ideal for distributed and large scale deployments with

features focused on reliability & remote management

Features

FaultRecovery

Security DistributedTiming

USRP N310 Motherboard

Analog Devices AD9371 RFIC – N310 (x2), N300 (x1)

USRP N300 – Reduced Cost Design

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USRP for 5G

5GNR – Subcarrier (SCS) Spacing and Bandwidth

N f,ref=2048

N f=4096

Δf ref=15⋅103 Hz

Δf max=480⋅103

LTE

5GNR

Max SCS FFT Size

N310/N300 - 5GNR Maximum Rates (4096-FFT)

μ Subcarrier Spacing (kHz)

Max Resource

Blocks

Max Subcarriers

Max RF Bandwidth

(MHz)

Max Rate (Msps)

Bands

0 15 275 3300 50 61.44 < 6 GHz

1 30 275 3300 100 122.88 < 6 GHz

2 60 275 3300 200 245.76 < 6 GHz> 6 GHz

3 120 275 3300 400 491.52 > 6 GHz

4 240 138 1656 400 491.52 > 6 GHz

● N310 supports sample clocks of 122.88 MHz (30.72 x 4), 153.6 MHz (30.72 x 5), 125 MHz● Coverage up to 5GNR 100 MHz bandwidth● DDC/DUC resampling filters for NR and LTE bandwidths < 100 MHz● Suitable for majority of NR band configurations < 6 GHz

N310/N300 – MIMO

● N310 – 4x4 Tx/Rx● N300 – 2x2 Tx/Rx● Phase coherency maintained between channel

pairs of each AD9371 RFIC● Not recommended for designs where scalable

phase coherency is required

Massive MIMO

NI 5G – mmWave and Frequency Bands > 6 GHz

NI 3647 modular radio headRF coverage - 71-76 GHz2 GHz bandwidth

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N310/N300Ethernet-Based Synchronization

White Rabbit

Ethernet Synchronization Requirements Meet synchronization and timing requirements for

cellular and other time sensitive applications Alternative to 10 MHz / PPS and GPS based

approaches Suitable for indoor environments and areas with

limited GPS coverage Multiple km cable lengths Suitable for a broad range of user applications

Ethernet Synchronization - What is White Rabbit?

● Extension of IEEE1588 Precision Time Protocol (PTP) standard

● Physical layer clock synchronization (similar to SyncE)

● Enhancement of IEEE1588-2008 timestamps using phase detection

● Automatic evaluation and compensation of link asymmetry

● Currently undergoing standardization by IEEE P1588 Working Group as a High Accuracy PTP Profile (WRPTP)

● Expected IEEE standard publication in 2018 or 2019

PTP messages used by White Rabbit

Ethernet Synchronization - Why White Rabbit?

● Open specification, open hardware, open software● Developed through global academic and industry collaboration● Partners include CERN, GSI Helmhotz Centre for Heavy Ion Research, and

universities around the world● Broad applicability of Ethernet (cellular, scientific, academic, etc.)● Scalable to thousands of nodes

N300/N310 – White Rabbit Hardware Requirements

● WR supported SFP transceivers, network equipment, and single mode fiber required

● Seven Solutions (https://www.sevensols.com) is preferred WR network provider

● WR Switch - https://www.ohwr.org/projects/white-rabbit/wiki/switch

● WR SFP - https://www.ohwr.org/projects/white-rabbit/wiki/SFP

● Uses dedicated SFP on USRP – Independent SFP ports required for timing and I/Q data

Seven Solutions WR Switch

NI USRP N310/N300

N310 – White Rabbit Performance● Timing measured performed with 1 m and 5 km

fiber links● 220 picosecond timing skew observed● Achieves target of sub-nanosecond timing

stability

● Seven Solutions WR Switch● Axcen AXGE-1254-0531 / 3454-0531 SFP● G652 single mode fiber 5km and 1m

Network Configuration

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Summary

● N310/N300 expands 5G-NR capability of the USRP product line

● Ettus Research - NI continues to participate in and follow developments in 3GPP and other standardization bodies

● New features to address developer and deployment needs

Thank You

USRP N310 in the demo room!