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Network Protocols

High-Performance Networking with Ethernet TSN /AVB Solutions


Full Connectivity


Cloud Accessibility


Safety & Performance

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IP-based Networking

Bringing Ethernet to Automotive

The Power of TSN and AVB
The Software Defined Vehicle (SDV) needs high-performance networking, IP addressing and security, which are available with Ethernet but not with CAN. 

Automotive applications also require guaranteed latencies, guaranteed bandwidth and redundancy for safety critical systems which are not available with basic Ethernet.  That’s why you need Ethernet TSN from Excelfore.
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Maximize Your Product's Potential

Scalable Network Bandwidth and Dynamic Switching

Ethernet enables cost-effective in-vehicle bandwidth scaling from 10MB multi-drop to 10GB and beyond. It also brings dynamic network switching, network  security and the ability to reach devices from the Cloud.

Amazon CloudFront
Enhanced Infotainment Clusters

AVB (Audio-Video Bridging) provides guaranteed bandwidth and synchronization for data streams. High-definition video & audio contents now move seamlessly between digital devices with synchronization and no caching delays.

Enhanced Automotive and Safety Systems

TSN (Time Sensitive Networking) adds guaranteed latencies for automotive control functions & the ability to build redundant network paths for safety-critical communications. Excelfore AVB/TSN is AVNU certified, so you also get interoperability with other certified AVB/TSN devices.

IP Addressing and Accessibility for CAN Buses

SOME/IP, DoIP, RTP, RTCP and UDS protocols from Excelfore bring your legacy systems forward into the age of the Software Defined Vehicle, integrating seamlessly into an Ethernet backbone to provide full cloud accessibility to your CAN based devices.

tsnav benefits final
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Key Features

Sharpen Your Competitive Edge

key protocol
Key Protocol Layers of the Network Model

Protocol stacks from Excelfore address layers 2 through 5 of the 7 layer network model:  Layer 2—Data Link; Layer 3—Network; Layer 4—Transport; Layer 5—Session.  Build these protocols onto the physical layer (Layer 1) and you have a stack ready for APIs (Layer 6) and Applications (Layer 7).

Quality of Service (QoS)
Precise Synchronization

AVB/TSN networks provide a grand master clock to enable network traffic and connected devices to precisely synchronize across the network
➤ Generalized precision time protocol (gPTP):  IEEE 802.1AS-2020

Guaranteed Latency

Properly constructed TSN networks guarantee the latency from source to destination across the network, ensuring precision control, decision algorithms and actuations meet specified timing requirements

Managed Network Redundancy

Key TSN protocols build redundancy into networks in safety-critical domains:
➤ Redundant data paths:  IEEE 802.1Qcb
➤ Redundant grand master clocks:  IEEE 802.1A 2020 / 802.1ASrev:  
➤ Message timing and synchronization:  IEEE 802.1AS / 802.1BA:  

Fault Tolerance
Stream Prioritization with Guaranteed Bandwidth

Key TSN protocols shape the network traffic to give priority to mission-critical data:
➤ High-precision grand master clock: IEEE 802.1AS-2020
➤ Stream reservation protocol: IEEE802.1Qcc
➤ Credit-based shaper:  IEEE 802.1Qav / 802.1Qat
➤ Time aware shaper:  IEEE 802.1Qbv  
➤ Asynchronous traffic shaping: IEEE 802.1Qrc
➤ Traffic pre-emption:  IEEE 802.1Qbu

Over-The-Air Updates
Network Integration Protocols

Excelfore provides additional protocols to bring IP addressing and stream  transport throughout multi-network environments:
➤ DoIP
➤ IEEE 1733: RTP, RTCP

Switch Protocol Sets
Switch Protocol Sets

➤ A mNetconf/Yang
➤ MRPD, Bridged PTP

Multi OS Support

Excelfore protocol stacks are supported on POSIX and real- time operating systems including: Android, AUTOSAR classic, AUTOSAR adaptive, FreeRTOS, Integrity, Linux, QNX and µVelOSity.

Multi-platform Support

Excelfore protocol stacks are available for the most popular networking and SoC semiconductor platforms including those from: Broadcom, Marvell, NXP, Renesas, STMicro and Texas instruments.

Experience the Power of Our Products: Request a Live Demo

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Use Cases

Unlocking the Power ofTSN/AVB

Surround-View Camera Cluster

Surround-View Camera Cluster

Protocol stacks from Excelfore helped a global automotive Tier-1 supplier to implement a surround-view camera cluster for a major European automaker. Four 100MB Ethernet AVB links were implemented, with “Talkers” pushing IEEE 1722 AVTP (AV Transport Protocol) streams from high resolution digital video cameras, which are then received by the “Listeners”.  IEEE 802.1AS gPTP (general Precision Time Protocol) is then used to synchronize the consolidated view with high precision. The solution was implemented in a small RTOS.

Drivers get an integrated view of all sides of their vehicle, effectively a “bird’s eye” perspective, to assist in precise handling of their vehicles when parking or navigating tight alleyways.

Fully Networked Vehicle

Fully Networked Vehicle

An innovative player in the automotive industry introduced a new platform in 2023 which provides comprehensive connectivity throughout the vehicle, including:


Vehicle Network Gateway


Zonal Controllers


Software Defined Cockpit


Driver Monitoring System


Battery Management System


Radar processor


LiDAR processor

Devices running 6 different OS environments, including a safety certified RTOS, work together in a seamless whole with precision signal synchronization and prioritization.

The many devices on this networked solution are also integrated with the cloud, using the eSync data pipeline with full vehicle OTA and data aggregation using eDatX.

benefits case stduy tsn av

Enjoy the latest news & blog from the industry.

Jun 12, 2024 1:18:57 AM

How the YANG/NETCONF Duo Enhance Vehicle Connectivity and Safety

May 30, 2024 1:59:52 AM

Vehicle Maintenance with Excelfore's OBDD*oSZYhdBlNe7DuRDkOBgKzg.jpeg

May 6, 2024 1:22:20 AM

Simplifying Vehicle Diagnostics With eSync*xzkgO2bFWubdtZ-7YHO6Qw.png

May 1, 2024 8:04:37 PM

The Art of Safe Updates: Strategies for Edge Device Maintenance

Apr 25, 2024 8:19:09 AM

The CI in CI/CD Might Just be the Apple of the OEM eye

Mar 19, 2024 3:36:43 AM

Simplifying Vehicle Diagnostics With eSync

Feb 22, 2024 4:00:21 AM

The Art of Safe Updates: Strategies for Edge Device Maintenance

Feb 16, 2024 5:13:45 AM

The CI in CI/CD Might Just be the Apple of the OEM Eye

Dec 21, 2023 9:46:44 PM

IIJ Global Teams Up for Connected Cars Security | Excelfore

Dec 6, 2023 12:59:13 AM

Explore Latency and TSN in Software-Defined Vehicles| Excelfore

Oct 10, 2023 8:07:31 AM

Lead the Global Automotive Sector with eSync OTA | Excelfore

Oct 10, 2023 8:05:37 AM

Enhance Automotive Innovation with eSync OTA | Excelfore

Oct 10, 2023 8:04:09 AM

Combining Experience and Excellence for the Global Automotive Industry

Dec 25, 2022 5:59:15 PM

Excelfore Unveils Integrated SDV Solutions at CES 2023

Jan 10, 2022 8:10:19 AM

Check out Green Hills Partnership for eSync OTA | Excelfore

Oct 27, 2021 11:05:25 AM

AVnu Alliance Partners for TSN Certification | Excelfore

Apr 6, 2021 4:24:44 AM

Red Hat Collaboration of Openshift with eSync OTA | Excelfore

Mar 10, 2021 7:50:29 AM

Check out eSync Agent SDK on Microsoft Azure | Excelfore

Dec 9, 2020 3:59:15 AM

JMC Adopts eSync for OTA Updates in Ford and JMC | Excelfore

Oct 20, 2020 12:50:26 AM

Ficosa picks eSync for OTA Updates in Maruti Suzuki cars | Excelfore

Aug 6, 2020 8:54:10 AM

Siemens Showcase eSync OTA Updates in AUTOSAR | Excelfore

Aug 4, 2020 8:26:52 AM

Ethernet protocols licensed for Capital VSTAR | Excelfore

May 26, 2020 4:03:39 PM

Low-Cost, Low-Risk OTA Integration with eSync SDK | Excelfore

May 13, 2020 4:11:47 AM

Excelfore joins with Green Hills for vehicle connectivity.

Jan 20, 2020 4:03:04 AM

Powering PREH Car Connect's European OEM | Excelfore

Jan 7, 2020 4:57:00 AM

Ethernet TSN & GPTP Stack Now in Open Source | Excelfore

Sep 8, 2019 5:01:18 PM

Excelfore collaborates with Microsoft on Automotive OTA

Sep 3, 2019 5:20:52 PM

FAW deploys Excelfore's eSync for automotive OTA updates

Jun 25, 2019 5:25:10 PM

eDatX Data Aggregation Platform for Automotive | Excelfore

Mar 14, 2019 7:40:49 AM

Baidu selects Excelfore eSync for the Apollo Autonomous

Feb 20, 2019 11:37:50 AM

Shrikant Acharya Unveils Time-Aware Shaper | Excelfore

Feb 6, 2019 2:43:02 PM

Excelfore adds Time Aware Shaper to Ethernet TSN protocol

Dec 12, 2018 11:31:29 AM

ZF honors Excelfore with award for top digitalization

Dec 6, 2018 7:27:09 PM

Impressive Demos at CES 2019 | Excelfore Innovation

Oct 24, 2018 7:22:28 PM

Excelfore Sets Up Automotive Connectivity Center in Japan

Sep 26, 2018 11:38:56 AM

Excelfore Ties with Molex and Hella through Investments

Sep 13, 2018 9:33:56 PM

eSync Alliance unveils its Board Officers | Excelfore

Sep 7, 2018 2:40:53 PM

eSync Alliance Names New Board and Election of Officers

Mar 8, 2018 5:59:33 PM

Securing automotive software over the air updates | Excelfore

Feb 22, 2018 3:47:45 PM

eSync Alliance Appoints Rick Kreifeldt as ED | Excelfore

Jan 9, 2018 7:42:00 AM

eSync Bi-Directional OTA for Vehicle Fleet | Excelfore

Jan 5, 2018 12:57:54 PM

Securing Automotive Connectivity with Molex|Excelfore

Jan 4, 2018 8:49:15 AM

eSync OTA Feature Upgrades and Predictive Analytics | Excelfore

Sep 14, 2017 8:05:50 AM

Adaptive Delta Compression for Automotive OTA | Excelfore

Aug 8, 2017 8:13:32 AM

Excelfore and Wipro Partner on Secure Connectivity Ideas

Jun 8, 2017 10:40:30 AM

eSync Alliance for Secure Automotive OTA | Excelfore

May 31, 2017 3:35:39 AM

Excelfore Offers OTA Updates and In-Vehicle Network Options

Jan 3, 2017 6:59:09 AM

Excelfore Showcases Smart Mobility Collaborations at CES

Jan 3, 2017 6:50:43 AM

Molex Partners to Expand In-Vehicle Connectivity | Excelfore

Dec 19, 2016 7:10:29 AM

Excelfore @ CES 2017: Smart Mobility Networks Demo

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Product Briefs

Download the
materials you need to get started.

Product Briefs

In-Vehicle Network (AVB, TSN) Stack Brief

Download Now
White Papers

What sets us apart from the others around?


Excelfore and Red Hat standardize automotive OTA updates

Our Guarantee

Delivering Seamless Connectivity and Reliable Updates

Faster Time to Market

At Excelfore, we provide standards-based solutions with powerful tools to drive faster in-vehicle and cloud integrations.

Through Leaders in Automotive Connectivity

From the first AVNU-certified AVB protocol stacks, to the first implementation of a full eSync OTA stack, Excelfore leads the way in connected technologies.

Driving Standards and Interoperability

Excelfore actively drives standards and interoperability for in-vehicle networking and cloud connectivity.

Building Trust through Partnership

Seamless integration is crucial to successful adoption of any technology. As your trusted partner, we provide comprehensive support throughout the integration process.

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Got Questions?

We will be happy to present you our solutions.

Excelfore’s Networking and eAVB/TSN Protocol Stacks are advanced sets of embedded software designed to offer critical In-Vehicle networking functions. They encompass protocols essential for diagnostics, discovery, configuration, and memory flashing, laying the groundwork for a high-speed Ethernet backbone in modern automotive electronics.

Excelfore’s protocol stacks stand out due to their ability to provide a comprehensive solution for today’s diverse automotive networking environments. They support guaranteed bandwidth and time synchronization over Ethernet, ensuring seamless entertainment and information systems integration.Furthermore, the stacks excel in control and safety applications by offering deterministic timing, guaranteed latencies, and redundant signal routing.

The eAVB/TSN Protocol Stack is customized for a high-speed Ethernet backbone, ideal for the heterogeneous networking landscape characterizing today’s automotive electronics.With features like guaranteed bandwidth and stringent time synchronization capabilities, it ensures that in-vehicle entertainment, control, safety, and information systems function seamlessly and efficiently.

Yes, Excelfore’s AVB/TSN protocol stacks have achieved the distinction of being the industry’s first base software stacks to receive certification for compliance by AVNU. Specifically, the Excelfore AVB Talker, Listener, and Switch protocol stacks have all garnered Avnu Milan Certification, emphasizing their reliability and functionality.

Absolutely. Excelfore’s Ethernet AVB/TSN stacks, along with associated protocols, are versatile and compatible with major POSIX operating systems like Linux, QNX, and Integrity.Additionally, they provide support for the AUTOSAR CP environment, making them suitable for a broad range of automotive applications.