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针对低轨卫星网络星际链路时变性、不可靠性等特点,提出了在低轨卫星网络中进行信息分发的多播卫星网络的自适应速率网络编码方案。首先,构造了多速率静态鲁棒网络编码算法;然后通过对网络容量的估计,实现了自适应速率网络编码。仿真结果表明:自适应速率网络编码提高了信息传递的成功率,所能达到的信息速率远优于固定速率下的网络编码策略,并且很好地逼近了网络的容量极限。
Aiming at the characteristics of the low-orbit satellite network such as the time-varying and unreliability of interstellar links, an adaptive rate network coding scheme is proposed for multicast satellite networks that distribute information in LEO satellite networks. First, a multi-rate static robust network coding algorithm is constructed. Then, the network capacity is estimated to achieve adaptive rate network coding. Simulation results show that adaptive rate network coding improves the success rate of information transmission, and the information rate achievable is much better than that of network coding strategy at fixed rate, and approaches the capacity limit of network well.