Photonic Firewall Placement for Static Services in All-Optical Networks

Photonic firewall primarily uses all-optical pattern matching techniques in the optical domain to filter the information carried by optical signals. Its purpose is to identify hidden network intrusions and attacks. Based on the advantages of fast processing, high efficiency and large capacity, one photonic firewall can replace tens of thousands of traditional electronic firewalls. However, it is difficult to place photonic firewalls at any node because its technology is still immature and in the early stages of research. Therefore, several suitable nodes are selected for photonic firewall placement, and the corresponding requirement is that each service passes through at least one photonic firewall. In this paper, a photonic firewall deployment scheme that minimizes the number of photonic firewalls and spectrum resource consumption is proposed. A linear programming model and a heuristic algorithm are developed to implement the proposed photonic firewall deployment scheme. Simulations are performed on two typical topologies. The results show that the linear programming and heuristic algorithm achieve a trade-off between the number of photonic firewalls and the consumption of network spectrum resources and have good feasibility.