With the inclusion of satellite Internet as the information infrastructure in China's "new infrastructure" category,relevant domestic industries and scientific research institutes have successively carri...With the inclusion of satellite Internet as the information infrastructure in China's "new infrastructure" category,relevant domestic industries and scientific research institutes have successively carried out the design of broadband low earth orbit(LEO) constellation systems and key technical research.As the core technology for the satellite-to-ground network communications of a broadband LEO constellation system,routing technology is extremely important for the efficient and reliable transmission of various service data.Focusing on the two important broadband LEO constellation systems in China,in-depth analysis and simulation of the high dynamics of the satellite-to-ground satellites are conducted in this paper to obtain more accurate network topology changes and characteristics;then the adaptability of the ground standard IP routing protocol to the broadband LEO constellation system is analyzed,and an LEO constellation simulation scenario is built with the Opnet software.The simulation results of the convergence performance of the standard IP routing protocol are produced.The results show that the IP protocol does not perform well for LEO satellite constellation networks.Based on the studies,some solutions are proposed to take full advantages of the characteristics of LEO satellite systems.These can also provide a reference for the choice of intersatellite routing architecture and protocol technology for broadband LEO constellation in the future development.展开更多
基于IP的语音传输(Voice over Internet Protocol,VoIP)技术对语音信号进行数字化处理,再转换为网际互连协议(Internet Protocol,IP)数据包,并进行传输,以达到在IP网络进行语音通信的目的。文章借助华为技术有限公司eNSP平台搭建了网络...基于IP的语音传输(Voice over Internet Protocol,VoIP)技术对语音信号进行数字化处理,再转换为网际互连协议(Internet Protocol,IP)数据包,并进行传输,以达到在IP网络进行语音通信的目的。文章借助华为技术有限公司eNSP平台搭建了网络拓扑模拟VoIP话音网络,利用华为的网络质量分析(Network Quality Analysis,NQA)技术测试网络并分析结果。展开更多
文摘With the inclusion of satellite Internet as the information infrastructure in China's "new infrastructure" category,relevant domestic industries and scientific research institutes have successively carried out the design of broadband low earth orbit(LEO) constellation systems and key technical research.As the core technology for the satellite-to-ground network communications of a broadband LEO constellation system,routing technology is extremely important for the efficient and reliable transmission of various service data.Focusing on the two important broadband LEO constellation systems in China,in-depth analysis and simulation of the high dynamics of the satellite-to-ground satellites are conducted in this paper to obtain more accurate network topology changes and characteristics;then the adaptability of the ground standard IP routing protocol to the broadband LEO constellation system is analyzed,and an LEO constellation simulation scenario is built with the Opnet software.The simulation results of the convergence performance of the standard IP routing protocol are produced.The results show that the IP protocol does not perform well for LEO satellite constellation networks.Based on the studies,some solutions are proposed to take full advantages of the characteristics of LEO satellite systems.These can also provide a reference for the choice of intersatellite routing architecture and protocol technology for broadband LEO constellation in the future development.
文摘基于IP的语音传输(Voice over Internet Protocol,VoIP)技术对语音信号进行数字化处理,再转换为网际互连协议(Internet Protocol,IP)数据包,并进行传输,以达到在IP网络进行语音通信的目的。文章借助华为技术有限公司eNSP平台搭建了网络拓扑模拟VoIP话音网络,利用华为的网络质量分析(Network Quality Analysis,NQA)技术测试网络并分析结果。
