Krzysztof Szarkowicz, Technical Marketing Engineer, Juniper Networks

O-RAN PlugFest Front Haul Transport Validation

Krzysztof Szarkowicz Headshot
Still images shows the words ‘O-RAN PLUGFEST 2022 Transport Testing’ with the following words underneath, ‘Telefonica, Juniper Networks, and Keysight Joint Demo,’ below that the names “Luis Contreras, Telefonica,’ Krzysztof Szarkowicz, Juniper Networks,’ ‘Avik Bhattachary, Keysight’

The future of RAN

Telefonica, Juniper Networks and Keysight validated the functionality of O-RAN Fronthaul Transport over a multi-hop packet-switched network as a part of the O-RAN PlugFest 2022. The validation includes transmission of control and user plane packets to validate interoperability and performance including timing and synchronization, latency and jitter.

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You’ll learn

  • Why O-RAN Fronthaul testing is important

  • Key O-RAN network infrastructure 

Who is this for?

Network Professionals Business Leaders


Krzysztof Szarkowicz Headshot
Krzysztof Szarkowicz
Technical Marketing Engineer, Juniper Networks

Guest speakers

Luis Contreras Headshot
Luis Contreras
Technology Expert, Telefonica
Avik Bhattacharya Headshot
Avik Bhattacharya
Senior Product Manager, Keysight Technologies


0:03 welcome my name is Christoph Sarkis from

0:05 Juniper Networks I would like to present

0:08 the join the testing performer

0:10 telefonica Juniper Networks and keysight

0:12 as part of the Orient lock Fest 2022

0:16 transport testing so why Oran frontal

0:19 testing is important well because we

0:21 need to provide a good solution to the

0:25 customers and I would like to ask Luis

0:27 from telephonica as well to express his

0:30 view on this please yeah actually this

0:33 is very relevant to understand the

0:34 behavior of the of the equipment on the

0:36 lab essentially the idea is to yeah to

0:39 have a clear

0:40 overview of what could be the the

0:42 respective Behavior once we move this

0:44 into the field and this is clearly

0:46 interesting for operations but not only

0:48 for operations also for planning for

0:50 engineering the whole process of moving

0:52 the equipment and implementing the

0:54 Solutions in the field great so Juniper

0:57 has the full portfolio to address the 5G

0:59 mobile transport and it's starting from

1:01 the small ACX 7024 which can be used on

1:04 the cell site router so on the on the

1:06 sidestart locations going through the

1:09 ACX 7348 ACX 7509 up to 86 7508 which is

1:15 the big box that can be used in the

1:16 aggregation site

1:18 and you know let's discuss the test

1:20 setup that we have used during the

1:22 testing so basically we have small

1:25 frontal network with two cell side

1:27 routers which are Juniper AC extorters

1:29 and one halfside router which is as well

1:31 Juniper ACX rotor and to these two small

1:35 Network we have Ariel du and CU

1:38 emulators emulated by keysight connected

1:40 and different locations and of course we

1:43 have as well some background traffic to

1:45 saturate the links and as well a grand

1:48 master emulated emulated by keysight so

1:52 let me give now the words to avik from

1:55 his sites to explain more data as about

1:57 the testing okay thank you Kristoff the

2:00 online transport is you know very

2:02 different from a traditional transport

2:03 in the sense that it needs to carry time

2:05 sensitive Radio Data through the packet

2:07 switch frontal so validation of such a

2:10 frontal transport requires creating

2:12 realistic traffic pattern for the cus

2:15 and in plain messages the timing pattern

2:18 and all of these with large number of

2:20 deals are use emulation so key sites are

2:23 you doing emulation capability based on

2:25 IX Network and novas Hardware allows the

2:28 user to measure transport performance at

2:30 high scale it validates the kpis that is

2:33 required to carry the latency sensitive

2:35 Radio Data and therefore helps test

2:38 compliance as per the order an alliance

2:40 wg9 test specification and in a system

2:43 level test the solution can be used to

2:46 identify potential bottlenecks at

2:48 specific transport elements for example

2:50 the transceivers switches smartness

2:53 operating systems or even the container

2:55 engines

2:56 while validating the overall transport

2:59 infrastructure at keysight we look at

3:01 the six technology enablers for us the

3:05 six pillars of 5G ran transport are the

3:07 time synchronization the deterministic

3:09 nature of traffic the encapsulations

3:12 that carry the radio data over Ethernet

3:14 or ECP in other words the network

3:18 slicing enabled by Technologies like

3:20 segment routing Etc the virtual

3:22 infrastructure that hosts the virtual

3:25 RAM and you know last but not the least

3:27 the security and encryption aspects so

3:31 our product portfolio spans across

3:33 different stages of the life cycle

3:35 starting from pre-silicon validation at

3:37 the left hand side which is covered by

3:40 the product called likes verify then IX

3:43 Network along with Nova's Hardware

3:44 covering the infrastructure test the

3:47 conformance tests through IX Anvil the

3:50 network impairment test through our

3:52 brand new product called any three and

3:54 finally the virtual infrastructure

3:56 validation through Cloud Peak

3:59 now coming to the specific test

4:01 configurations used for this plug Fest

4:04 each of the emulated ODU Oru pair is

4:07 configured with 100 megahertz downlink

4:10 carrier and 100 megahertz Uplink carrier

4:13 with 30 kilohertz subcarrier spacing

4:16 this results to 1.75 gbps of ECP traffic

4:20 stream in both Uplink and downlink

4:23 direction

4:24 the traffic streams between ocu and ODU

4:27 is configured with 1.2 gigabits of you

4:30 know throughput in both Direction and

4:33 also background traffic streams

4:35 traversing the HSR or the hopsight

4:37 router and each of the csrs or the cell

4:40 site routers is configured with 38.2

4:43 gbps of throughput in both Direction

4:46 the ECP streams are configured with

4:48 proper cos settings for strict priority

4:52 queuing so that they experience no loss

4:55 and minimum Network delay

4:58 with this configuration traffic is

5:00 blasted through the front hall to

5:03 measure loss latency and packet delay

5:05 variation no packet loss was observed

5:08 during the test as shown in the IX

5:11 Network statistics

5:12 also maximum latency for EC pre-streams

5:16 was observed as about 20 microseconds

5:19 minimum was about 5 microseconds and

5:22 average was about 6 microseconds The IX

5:26 network based clock quality analysis

5:28 tool was used to measure explain

5:31 characteristics average time error on

5:34 emulated ODU ports that was running a

5:37 PTP follower clock was about one

5:39 nanosecond it means the HSR added only

5:42 one nanosecond of constant time error

5:45 while propagating time to the ODU

5:48 on the audio side the average time error

5:51 observed on each emulated Oru ports was

5:54 about 75 nanoseconds maximum relative

5:58 time error turned out to be about 10

6:01 nanosecond at Oru Unis of those orus

6:05 so now I will hand it over to Luis once

6:09 again to let us know about the

6:11 importance of this validation

6:13 so thanks avik so we have seen uh along

6:17 the presentation there is a diverse and

6:20 Rich number of options in the deployment

6:22 of from four mutual and Bachelor

6:24 Solutions so this is the this shows the

6:27 relevance of having a clear

6:29 characterization of the solutions before

6:30 going into the field

6:32 not only from the operational point of

6:33 view but also the engineering the

6:35 planning all of this is a

6:38 is is impacted let's say by a good

6:41 characterization before going into the

6:43 field so

6:44 um I would like to thank unipan and

6:46 Chrisette for this exercise it was a

6:48 very uh insightful and relevant for us

6:51 and yeah uh thanks for for participating

6:54 on on this list

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