IEEE 802.1ASdm-2024 Becomes an IEEE Standard – Advancing Time-Sensitive Networking

By Alexander Mozgovenko, Sales Engineering Manager

March 5, 2025

The IEEE has officially ratified IEEE 802.1ASdm-2024, an important update to the Time-Sensitive Networking (TSN) standards. This amendment enhances clock synchronization capabilities, improving the reliability and precision of real-time communication in networked systems. Industries such as automotive, industrial automation, and telecommunications increasingly depend on TSN for achieving deterministic data transfer with minimal latency, making this development relevant for a wide range of applications.

CAST and our R&D team follow these standards efforts very closely, and we expect to support the new standard in our TSN product line in the future. Meanwhile, here are highlights of the new 802.1ASdm-2024 standard’s benefits, and a summary of our current TSN offerings.

Overview of IEEE 802.1ASdm-2024

IEEE 802.1ASdm-2024 is an amendment to the IEEE 802.1AS standard, which defines generalized Precision Time Protocol (gPTP) for Ethernet networks. The update introduces enhanced redundancy, improved scalability, and better synchronization accuracy, addressing the growing demands of high-performance, real-time applications.

Key aspects of IEEE 802.1ASdm-2024 include:

• Standardization of Hot Standby: The first IEEE standard to officially define and support this feature. Hot standby provides redundant synchronization paths, ensuring continuous network operation.
• Clock Drift Error Reduction: Enhances long-term synchronization stability by minimizing drift between networked devices.
• Increased scalability: Supports more complex TSN deployments.
• Enhanced synchronization accuracy: Reduces jitter and drift in distributed systems.

CAST’s TSN IP Cores

CAST provides a range of TSN IP Cores designed to support clock synchronization, traffic shaping, and low-latency communication in TSN-enabled ASICs and FPGAs. These cores help engineers develop compliant and efficient solutions for industrial automation, automotive networks, and telecommunications.

Key Features of CAST’s TSN IP Cores

• Compliance with IEEE TSN Standards: Includes IEEE 802.1AS, 802.1Qav, 802.1Qbv, 802.1Qci, 802.1CB, 802.1Qbu/br, and more.
• Optimized for Low Latency & High Precision: Ensuring accurate and deterministic communication.
• Proven Interoperability: Compatible with major TSN ecosystems.
• Scalable and Configurable: Suitable for various applications.

TSN Development with CAST

CAST’s field-proven and silicon-optimized TSN IP cores provide a reliable foundation for next-generation networking solutions. Whether designing TSN-enabled automotive ECUs, industrial controllers, or 5G fronthaul devices, our IP cores help streamline development and ensure compliance with IEEE standards.

For more information on CAST’s TSN solutions, or to express interest in the new TSN standard with Hot Standby - contact us today to explore how our IP cores can support your TSN development needs.