近年来,物联网技术得到了快速发展,已经在许多领域得到了广泛应用.然而,关于卫星物联网技术的研究还不够充分,很多方面尚处在初级阶段.尤其是物联网大连接、低功耗的特点,对传统卫星通信技术带来了巨大挑战,需要针对卫星物联网的工作特点,研究新型网络架构、组网方式、传输体制和通信协议等内容.因此,针对卫星物联网的多址接入协议开展研究,基于几种可能适用于低轨卫星物联网应用场景的多址接入协议,重点分析比较了这几种协议的吞吐量性能,获得了一些有益的结论.%In recent years, the technology of the IoTs has developed rapidly and has been widely used in many fields. However, the research on the technology of the satellite-based Internet of things is not enough, and many aspects are still in the primary stage. In particular, the characteristics of large connection and low power consumption of the IoTs have brought great challenges to the traditional satellite communication technology. In view of the characteristics of the work of satellite-based IoTs, it is necessary to study the new network architecture, the networking mode, the transmission system and the communication protocol. Therefore, the study on the multiple access protocol for application scenarios of Leo satellite-based IoTs is carried out. Based on several kinds of multiple access protocols that may be applied to the scenario of low earth orbit satellite-based IoTs, the throughput performance of these protocols is mainly analyzed and compared, and some useful conclusions are acquired.
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