What Is TSDN and How Does It Transform Transport Networks?

What Is TSDN?

TSDN (Transport Software Defined Networking) represents a major transformation of transport network architecture by horizontally decoupling hardware, software, services, and applications. Using a unified SDN architecture and standard RESTful northbound interfaces, it can quickly integrate with upper‑level systems such as BSS/OSS, support custom APP development, and accelerate business innovation and e‑commerce operation.

Agile Controller‑Transport

The Agile Controller‑Transport sits in the control layer of TSDN and serves as the SDN controller for transport networks. It provides centralized control of network resources, enabling flexible and dynamic scheduling based on business demands, thereby improving resource utilization.

Centralized control is the fundamental function of Agile Controller‑Transport, forming the basis for network softwareization.

Through southbound interfaces it communicates with physical devices, gathers resource and topology information, abstracts device, network, and service layers.

Built‑in PCE module provides centralized path computation, enabling unified service management and higher resource efficiency.

Key Features of TSDN

Agile Service Provisioning – Open northbound interfaces allow seamless integration with IT systems, enabling rapid, minute‑level service deployment and e‑commerce‑style operation where users can set bandwidth and SLA parameters.

Network Resource Visualization – Upper‑level applications can automatically discover topology, retrieve resources, and present them visually, allowing clear insight into network health and timely adjustments.

Application Scenarios

Enterprise Dedicated Lines – With the rise of cloudization, enterprises require diverse and rapidly changing dedicated line services, including Enterprise‑to‑Enterprise, Enterprise‑to‑Internet, Enterprise‑to‑DC, and DC‑to‑DC connections.

Data Center Interconnect (DCI) – As data centers become traffic hubs in the cloud era, east‑west traffic grows, making DCI crucial. Dynamic cloud workloads demand flexible network designs; static configurations and peak‑based bandwidth planning lead to low utilization and waste.