Abstract:

Software-defined networking (SDN) relies on the concept of programmable and reconfigurable,and will play an important role in the development of future satellite networks.By decoupling the control plane and data plane,the software-defined networking approach simplifies network management and accelerates network innovation.With the comprehensive deepening of the satellite "orbital revolution" and the growing demand for satellite communications,attention to and research on software-defined satellite networks are constantly deepening and make it a new paradigm.And the programmability required is offered to dynamically manage a satellite network.As the key concern of network performance,controller deployment is the basis of SDSN.In the current research,the impact of processing delay and link states on network performance is often ignored,which may lead to unreasonable control domain partitions which leads to unbalanced controller loads,poor network reliability and other problems.Therefore we take the processing delay and link states into account and design a Multi-controller reliability deployment strategy based on control delay (CDS-R) in the Software defined satellite network.In order to demonstrate its performance,a controlled experiment is designed.Experimental results show that CDS-R could significantly improve the network load balancing performance with an acceptable reassignment expense.CDS-R can decrease the control delay by nearly 35% and improve reliability obviously compared with other schemes.

Key words: software defined satellite networking, controller deployment, control delay, link failure