Delay Based Multi-controller Placement in Software Define Tactical Network

With the wide and prosperous application of software-defined tactical network (SDTN), multi-controller placement on software-defined tactical networks (SDTN) has proved to increase to the recurrent issues brought about by SDN logical centralized principle which arises in large network environments. It will cause new requirements to reduce the network delay cost. For example, in an alliance operation, we need to share information frequently. However, in traditional tactical networks, it is very complicated to manage the management domain under mobility. The implementation and placement on the multi-controller approach have left gaps for research especially to dynamic systems, and their networks do have controllers that receive nodes. In this paper, first, we proposed a system model considering the dynamic network scenario and established objective function. Secondly, we proposed the CP-A1-Approximation algorithm, analyzed this algorithm with two other different algorithms finding complexity and compared for reducing delay effectively.