Performance Modelling and Evaluation of In-Band Control Mode in Software-Defined Satellite Networks Based on Queuing Theory

∗Software-defined network (SDN) can provide a flexible, programmable, and controllable way by a logical separation of the control and data planes. Therefore, adopting SDN techniques may benefit satellite networks in terms of network configuration and management. Due to the limited resources on satellites such as bandwidth and capacity, SDN-based satellite networks can still confront challenges. In this paper, we propose an in-band control mode of software-defined satellite network (SDSN) architecture, and then we model and evaluate the performance of SDSN. With the discussion of the dynamic characteristics of satellite networks, the forwarding and processing models of data traffic in switches is developed by adopting the priority-based queuing systemM/M/1/m. Based on that, an overall model is then given to evaluate the system performance. Results show that the proposed model provides a good approximation of the SDSN performance.

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