| Citation: | FEI Changjiang, ZHAO Baokang, YU Wanrong, et al. A routing strategy for software defined satellite networks considering control traffic[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(12): 2575-2585. doi: 10.13700/j.bh.1001-5965.2018.0343(in Chinese)
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Software defined satellite networks (SDSN) provides an innovative perspective to manage satellite networks through decoupling the data and control planes to achieve logically centralized network states and controls. In SDSN, control messages and data packets are simultaneously transmitted in the network. Massive, dynamic and high-priority control traffic will cause significant interference to data packet transmission. Therefore, a data flow retreat routing (DFRR) strategy is proposed. When calculating data packet routes, DFRR takes control traffic on a link as a factor affecting the link cost to reduce choosing links with large control traffic; before control traffic distribution changing greatly caused by the handoff of overhead satellite connecting with the network operation and control center (NOCC), DFRR predicts probable congested links and selects some data flows on these links for rerouting to avoid congestions. The performance of DFRR is evaluated on OpenSatNet, a research platform we developed for SDSN. The experiment results show that DFRR can reduce link congestions in the network and the packet losses of control messages and data packets effectively.
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