The ultra-high link latency of the conventional central reservation switching method in satellite optical networks limits link utilization. In this study, a novel fully distributed competitive satellite optical burst switching (DC-SOBS) mechanism was proposed to overcome the drawbacks of the optical circuit switching method and achieve link multiplexing. Furthermore, the proposed method addressed the low link utilization problem caused by the high link latency of the central-control-related methods. The DC-SOBS mechanism in the ring network of six Geostationary Orbit (GEO) satellites improved link utilization by three orders of magnitude compared with the reservation method. A data conflict processing method was proposed to ensure that the same information was provided to various optical switching nodes, and the same algorithm was used to achieve a consistent scheduling result in each node.
The combination of satellite optical switch and transmission can realize the direct switch of satellite optical data, and avoid the problem that it is difficult to realize the super large data capacity switch under the condition of limited processing ability of satellite electric devices. In this paper, the characteristics and application requirements of satellite network are analyzed deeply. By combing with the constraints of space environment, device selection, and engineering implementation, a multi-mode optical switching technology scheme of satellite network based on the optical burst switching system is proposed. The scheme can support the three modes of optical circuit switching, optical flow switching and optical burst switching at the same time. It is often suitable for satellite networks with limited resources of satellite to ground and inter satellite links. It needs to support the application environment of multiple service systems optical link multiplexing.
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