Narrow Band Internet of Things(NB-IoT),as a low-power wide area network technology,is specially designed to connect a large number of low-power devices.The low-orbit satellite IoT based on this technology has lower transmission loss and delay,and can achieve seamless coverage of the earth through constellations.However,low-orbit satellites are highly dynamic and face QoS requirements from different users.These factors greatly affect the throughput performance of existing resource scheduling algorithms.In response to these challenges,this paper proposes a high-throughput NB-IoT low-orbit satellite IoT resource scheduling algorithm by comprehensively considering satellite channel characteristics,reliability and delay requirements between different users,and differential Doppler caused by high satellite dynamics in a scenario where a large number of IoT users request wireless resources and time-frequency resources are limited.Simulation results show that compared with existing methods,the resource scheduling algorithm proposed in this paper shows significant performance improvement in system throughput.
关键词
窄带物联网/低轨卫星/物联网/资源调度
Key words
Narrow Band Internet of Things(NB-IoT)/low-orbit satellites/Internet of Things/resource scheduling
维普
万方数据