关键词: 空间站;带宽分配;随机流模型;无穷小摄动分析;随机逼近

Abstract:

Considering the limits of on-board resource, the multi-nodes bandwidth allocation algorithm of space station transport link was put forward. First, regenerative relay satellite is equivalent to a basic SFM node with limited buffer capacity and service rate, establish serial SFM node chain model SMSFM (serial multi-nodes SFM) built up with space station node and relay satellite node with on-board processing capacity; on this basis, a bandwidth cross-layer allocation model is established; IPA method and SA theory are used to introduce corresponding bandwidth resource cross-layer allocation method; at last, validate performance of the algorithm introduced in this paper through a simulation example, and analyze the influence of limited on-board processing resources on system performance through simulations. Simulation results show that the bandwidth allocation algorithm introduced in this paper can better approximate actual bandwidth demand of service flows and effectively improve network bandwidth utilization.

Key words: space station; bandwidth allocation; stochastic fluid model; infinitesimal perturbation analysis; stochastic approximation