| Citation: | LI X R，ZHANG X Y，LI Z，et al. FC-AE-1553 dynamic bandwidth scheduling mechanism for multi network controllers[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（9）：2963-2974 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0755
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Due to the increasingly complex communication requirements of avionics system, the communication system based on FC-AE-1553 networking needs to use multiple network controllers (NC) to build a distributed network environment. The key lies in the distribution of control rights across various controllers and the resolution of cross-domain service conflicts. In order to realize multi NC collaborative scheduling, this paper proposes a multi NC dynamic bandwidth scheduling mechanism based on master-slave NC collaboration, which uses concurrent communication to improve network bandwidth utilization and enhance the transmission guarantee capability of various services. For periodic traffic, fixed time slots are used for transmission, for time constraint burst traffic, preemptive bandwidth allocation is used, and for common burst traffic, bandwidth allocation is based on "inter-domain and then intra-domain". The results indicate that the scheduling mechanism is capable of satisfying the collaborative bandwidth allocation and scheduling of various communication services in the presence of multiple network controllers. Furthermore, it can ensure the real-time usage remains below 57%. Multi-NC control offers a clear advantage in terms of latency compared to single NC centralized control, specifically when the network load exceeds 0.5 or the ratio of cross-domain/intra-domain services is higher than 0.8.
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