基于5G高速率、低时延的特性,结合广播电视网络网际互连协议(Internet Protocol,IP)数据传输需求,提出一种融合深度强化学习与自适应阈值优化的IP数据封装方法。其基本原理是通过动态计算数据优先级、优化封装阈值及校验传输完整性等,...基于5G高速率、低时延的特性,结合广播电视网络网际互连协议(Internet Protocol,IP)数据传输需求,提出一种融合深度强化学习与自适应阈值优化的IP数据封装方法。其基本原理是通过动态计算数据优先级、优化封装阈值及校验传输完整性等,实现高效可靠的IP数据传输。实验结果表明,所提方法在服务质量(Quality of Service,QoS)保障成功率、封装效率、端到端时延及资源块利用率等方面显著优于传统数字视频广播-运动图像专家组(Digital Video Broadcasting-Moving Picture Experts Group,DVB-MPEG)方法,可为5G与广电网络深度融合提供技术支撑。展开更多
随着网际互连协议(Internet Protocol,IP)网络在广播电视信号传输中的广泛应用,网络拥塞和信号质量下降等问题日益突出。针对上述挑战,深入分析IP组播、服务质量(Quality of Service,QoS)机制及网络编码等关键技术,在此基础上提出一种...随着网际互连协议(Internet Protocol,IP)网络在广播电视信号传输中的广泛应用,网络拥塞和信号质量下降等问题日益突出。针对上述挑战,深入分析IP组播、服务质量(Quality of Service,QoS)机制及网络编码等关键技术,在此基础上提出一种改进的自适应比特率算法。该算法结合网络状态感知和内容复杂度评估,可实现传输参数的动态调整。通过在模拟网络环境中进行大规模实验,结果表明所提算法在带宽利用率、传输时延及画质方面均有显著提升。此次研究成果为IP网络下广播电视信号的高效传输提供了新的技术方案。展开更多
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
文摘基于5G高速率、低时延的特性,结合广播电视网络网际互连协议(Internet Protocol,IP)数据传输需求,提出一种融合深度强化学习与自适应阈值优化的IP数据封装方法。其基本原理是通过动态计算数据优先级、优化封装阈值及校验传输完整性等,实现高效可靠的IP数据传输。实验结果表明,所提方法在服务质量(Quality of Service,QoS)保障成功率、封装效率、端到端时延及资源块利用率等方面显著优于传统数字视频广播-运动图像专家组(Digital Video Broadcasting-Moving Picture Experts Group,DVB-MPEG)方法,可为5G与广电网络深度融合提供技术支撑。
文摘随着网际互连协议(Internet Protocol,IP)网络在广播电视信号传输中的广泛应用,网络拥塞和信号质量下降等问题日益突出。针对上述挑战,深入分析IP组播、服务质量(Quality of Service,QoS)机制及网络编码等关键技术,在此基础上提出一种改进的自适应比特率算法。该算法结合网络状态感知和内容复杂度评估,可实现传输参数的动态调整。通过在模拟网络环境中进行大规模实验,结果表明所提算法在带宽利用率、传输时延及画质方面均有显著提升。此次研究成果为IP网络下广播电视信号的高效传输提供了新的技术方案。
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.
