Implementation and evaluation for the commercial uses of OAI

Copyright 2019 FUJITSU LIMITED

Implementation and evaluationfor the commercial uses of OAI

27th June, 2019Yuko AKIYAMA, FUJITSU Limited

[email protected]

0

First OAI North America Workshop

Our team

Developing for commercial use of OAI-eNB since August 2017 Features added (re-establishment, Handover etc.)

Quality improvement (load test, CI, code clean up)

Copyright 2019 FUJITSU LIMITED1

FUJITSU activity (feature based)


FDD / TDD (Config1/Config2)Duplex

5MHz / 10MHz / 20MHzBandwidth

TM1(SISO) / TM2 / TM3(MIMO) / TM4 / TM5 / TM6 / TM7Transmission Mode

PSS / SSS / PBCH / PCFICH / PHICH / PDCCHDL Channel

PRACH / PUSCH / PUCCH (format 1/1a/1b) / SRS / DRSUL Channel

OFDMA (DL) / SC-FDMA (UL)Multiple Access

QPSK / 16QAM / 64QAMModulation

Origination/Termination/Release/Reestablishment/Hand OverCall

Features tested / implemented by FUJITSUImplementedTested

Tested Tested

Tested

Tested Tested Tested


Tested

Tested Tested Tested Tested Tested Tested



Number of UEs ↑ (256UEs w/ Bw5MHz)PerformanceImplemented

sXGP / O&M (Network Data Collection)OthersImplemented

Implementing

Implemented

Tested

Tested

Tested

Implementing

Implemented

2

Coaxial CableUE-Sim

ethEPC-Sim

Load test for OAI-eNB（Environment）

Verifying stability of OAI-eNB operation


UE Load Simulator

TX

RX

EPC LoadSimulator

eNB Software

FJT VirtualizationPlatform

Linux

VM(4Core)

OAI-eNB(Test Target)

Test conditions

DuplexFDD,

TDD Configuration1

Transmission Mode SISO(TM1)

Bandwidth 5.0 MHz

Scheduler Mode fairRR

Test categories Test for Robustness / Capacity

•Burst RACH per millisecond

•Stress test with maximum number of UEs

Test for Long-term Stability

•Long time(i.e. over 12 hours) C-plane and U-plane combined Test

USRP

Artiza Networks：LTE-A Tester DuoSIM-A

3

http://www.artizanetworks.com/

Load test for OAIｰeNB（Results）


Overall evaluation was good

RF of eNB(USRP X310)

OAI-eNB(Fujitsu’s IA Server)

Artiza Networks：LTE-ATester DuoSIM (EPC / UE)

RF-unit ofUE simulator



RACH per ms (Burst RACH)

UE Simulator eNB Software

1ms

RACH Preamble

…

Continue for 2 minutes

Time transition of Attach completion rate

Time

100%

50%

0%

Att

ach

co

mp

leti

on

rat

e

5

99.3%

Time

100%

50%

0%

100%

Att

ach

co

mp

leti

on

rat

e

10 RACH per ms6 RACH per ms



8640 BHCA(busy-hour call attempts) for 12 hours

RR

C Co

nn

ecte

d

SequenceCompletion

Rate

Seq.1 Paging 100%

Seq.2 Attach 84.5%

Seq.3 Re-establishment 85.1%Seq.4 Re-establishment

Complete ~ Detach 93.8%

Time

200

0

100

Assertion!!Anomaly!!

Now debugging for stabilization30 bug fixes to be contributed

6

Enhancement of X2 Handover

7

Support FDD & TDD (Configuration 1)

Expansion of Neighbor Cells : 2 or more cells

EPC

OAI-eNB#3

OAI-eNB#1

OAI-eNB#2

HUB

USRP X310

USRP B210

USRP B210

Cell ID:3584

Cell ID:3585

Cell ID:3586

2 neighbor cells

Cell ID:3584

Cell ID:3586

Cell ID:3585

Cell ID:3585

Cell ID:3584

Cell ID:3586

FDD Band3BW5MHz

Transmition Power:-15dbm


10m

5m

MIMO with nFAPI I/F


Now verifying MIMO(TM3) with our original PHY function

FUJITSU PHY function

eNBfairRR Scheduler

(2cw ver.)

nFAPI Interface

USRP X310

Commercial UE

OAI-CN

Test Conditions

Duplex FDD

Bandwidth 20 MHz

8

DL throughputover 100Mbps

nFAPI expands the possibilities of OAI

9

Allows the connection of many device types

There are still challenges Synchronization is not stable

not real-time

Tune the parameters of the nFAPI Interface

What we should do for OAI and its users Documentation

•Parameters (OAI original interpretation)

•Sequence and timing chart of synchronization and sub-frame processing

Interoperability test


FUJITSU OriginalLTE PHY functionLTE Higher Layers

nFAPI Interface

CI running time at Fujitsu side


215,292min = 150daysAlways running !!

[min]

215,292min

48 bugs found & fixed

0

50,000

100,000

150,000

200,000

250,000

2018/12/01 2019/01/01 2019/02/01 2019/03/01 2019/04/01 2019/05/01 2019/06/01

Hardware

Simulated

Simulated CI

IA server USRP X310

ADBJenkins Hardware CI

IA server

OAI-eNBr(L3/L2)

L1 Simulator(ulsim,dLsim)

OAIEPC

OAIeNB

L2 nFAPISimulator

(L3/L2)

In search of new RRH interfaces

11

Ether(UHD)

CPRI

InterfaceConversion

Box

OAI-eNB OAI-EPCFUJITSU RRH

Supporting more types broadens the usefulness of OAI

Now trying to connect OAI-eNB with FUJITSU’s products

development to expand interface variation eCPRI

ORAN


The number of commits trend (Last 1 Year)


3,251

2,134

--all --no-merges

Number of commits 52% up compared to last 12mon.

52%UP

3,000

2,000

1,000

Jun.2018 Jun.2019

2018～2019

2017～2018

12

and Congratulations on the release Master Branch v1.0.0

Master Branch Updated!

Jan.2019

OAI community health analytics


com

mit

s

It is good for everyone to see the status of the community in real time

com

mit

ters

oai_git_evolution_domains

oai_git_commits_timezone

Timezone(UTC)

timeline

com

mit

s

Progress of the past proposal from Fujitsu

1. Provide working “master branch”

Increase OAI stability

→Achieved

2. Merge new features easily

Reduce time to merge new features

→CI is working

3. Keep source code in an easy-to-understand state

Make the latest source code easy-to-understand

→Code Clean Up is ongoing


Why Do We Need Quality Improvement?

Improving the quality leads to the development of the community


Let’s increase OAI fans!!

More users and developers

Improve quality

Communitydevelopment


Documents

Implementation and evaluation for the commercial uses of OAI