With the rapid development of lunar exploration,a large amount of scientific data and media stream service needs to be transmitted through Lunar Space Communication Networks(LSCNs).Due to limited transmitter power and...With the rapid development of lunar exploration,a large amount of scientific data and media stream service needs to be transmitted through Lunar Space Communication Networks(LSCNs).Due to limited transmitter power and intermittent,long delay and packet loss connections,the reliable and efficient multi-priority services’transmission in LSCNs becomes an urgent problem.Firstly,we propose a Streaming Transmission Model(STM)based on temporal and spatial topology graph to describe the delay and energy consumption for data transmission in LSCNs.Then,we further devise a Coded Forward Scheme based on STM,termed CFS-STM,to achieve multi-priority service in two steps:i).Link Stability Function(LSF)is established by solving an optimization problem to choose the appropriate single-hop path.ii).Raptor code is employed to further save delay and energy with adjustable code-rate according to the different channel conditions.Experiment results show that,CFS-STM can significantly improve the transmission efficiency of multi-service priority streaming delivery in LSCNs.展开更多
基金supported by the National Natural Sciences Foundation of China under Grant 61701136,Grant 61831008,and Grant 61525103Guangdong Science and Technology Planning Project Grant 2018B030322004the project“Verification Platform of Multi-tier Coverage Communication Network for Oceans(LZC0020)”。
文摘With the rapid development of lunar exploration,a large amount of scientific data and media stream service needs to be transmitted through Lunar Space Communication Networks(LSCNs).Due to limited transmitter power and intermittent,long delay and packet loss connections,the reliable and efficient multi-priority services’transmission in LSCNs becomes an urgent problem.Firstly,we propose a Streaming Transmission Model(STM)based on temporal and spatial topology graph to describe the delay and energy consumption for data transmission in LSCNs.Then,we further devise a Coded Forward Scheme based on STM,termed CFS-STM,to achieve multi-priority service in two steps:i).Link Stability Function(LSF)is established by solving an optimization problem to choose the appropriate single-hop path.ii).Raptor code is employed to further save delay and energy with adjustable code-rate according to the different channel conditions.Experiment results show that,CFS-STM can significantly improve the transmission efficiency of multi-service priority streaming delivery in LSCNs.