SDN in Tactical Networks: Advances and Open Challenges in the Field

Software-defined Networking (SDN) has improved the performance, availability, and security of physical and virtual networks, with growing potential for application in modern Tactical Networks (TNs). Recent studies suggest that SDN-capable switches and controllers can support hybrid models that combine distributed and centralized control over unreliable radio links in TNs. Motivated by this potential, the present article identifies the key challenges to effective deployment of SDN in tactical environments. Drawing on practical experiments and lessons learned, the study outlines the requirements that SDN must meet to operate at the tactical edge. In addition, current solutions address resource constraints, resilience, and the integration of data and Artificial Intelligence (AI), while examining the limitations of traditional SDN paradigms in tactical scenarios and outlining future directions for Software-Defined Tactical Networks (SDTNs).