With the new promising technique of mobile edge computing (MEC) emerging, by utilizing the edge computing and cloud computing capabilities to realize the HTTP adaptive video streaming transmission in MEC-based 5G netw...With the new promising technique of mobile edge computing (MEC) emerging, by utilizing the edge computing and cloud computing capabilities to realize the HTTP adaptive video streaming transmission in MEC-based 5G networks has been widely studied. Although many works have been done, most of the existing works focus on the issues of network resource utilization or the quality of experience (QoE) promotion, while the energy efficiency is largely ignored. In this paper, different from previous works, in order to realize the energy efficiency for video transmission in MEC-enhanced 5G networks, we propose a joint caching and transcoding schedule strategy for HTTP adaptive video streaming transmission by taking the caching and transcoding into consideration. We formulate the problem of energy-efficient joint caching and transcoding as an integer programming problem to minimize the system energy consumption. Due to solving the optimization problem brings huge computation complexity, therefore, to make the optimization problem tractable, a heuristic algorithm based on simulated annealing algorithm is proposed to iteratively reach the global optimum solution with a lower complexity and higher accuracy. Finally, numerical simulation results are illustrated to demonstrated that our proposed scheme brings an excellent performance.展开更多
为应对未来移动网络所面临的巨大挑战,业界提出了自适应比特流(adaptive bit rate,ABR)技术和移动边缘计算(mobile edge computing,MEC),旨在为用户提供高体验质量、低时延、高带宽和多样化的服务。联合ABR和MEC来优化视频内容分发,对...为应对未来移动网络所面临的巨大挑战,业界提出了自适应比特流(adaptive bit rate,ABR)技术和移动边缘计算(mobile edge computing,MEC),旨在为用户提供高体验质量、低时延、高带宽和多样化的服务。联合ABR和MEC来优化视频内容分发,对于提高网络性能和用户体验质量具有重要意义。其中,各项网络资源的联合优化是重要的研究课题。首先对MEC进行了概述,然后基于面向自适应流的MEC缓存转码联合优化问题,对业界已有工作进行了分析和对比,并对未来面临的挑战和研究难点进行了归纳和展望。展开更多
基金support by the Major National Science and Technology Projects (No. 2018ZX03001014-003)
文摘With the new promising technique of mobile edge computing (MEC) emerging, by utilizing the edge computing and cloud computing capabilities to realize the HTTP adaptive video streaming transmission in MEC-based 5G networks has been widely studied. Although many works have been done, most of the existing works focus on the issues of network resource utilization or the quality of experience (QoE) promotion, while the energy efficiency is largely ignored. In this paper, different from previous works, in order to realize the energy efficiency for video transmission in MEC-enhanced 5G networks, we propose a joint caching and transcoding schedule strategy for HTTP adaptive video streaming transmission by taking the caching and transcoding into consideration. We formulate the problem of energy-efficient joint caching and transcoding as an integer programming problem to minimize the system energy consumption. Due to solving the optimization problem brings huge computation complexity, therefore, to make the optimization problem tractable, a heuristic algorithm based on simulated annealing algorithm is proposed to iteratively reach the global optimum solution with a lower complexity and higher accuracy. Finally, numerical simulation results are illustrated to demonstrated that our proposed scheme brings an excellent performance.
文摘为应对未来移动网络所面临的巨大挑战,业界提出了自适应比特流(adaptive bit rate,ABR)技术和移动边缘计算(mobile edge computing,MEC),旨在为用户提供高体验质量、低时延、高带宽和多样化的服务。联合ABR和MEC来优化视频内容分发,对于提高网络性能和用户体验质量具有重要意义。其中,各项网络资源的联合优化是重要的研究课题。首先对MEC进行了概述,然后基于面向自适应流的MEC缓存转码联合优化问题,对业界已有工作进行了分析和对比,并对未来面临的挑战和研究难点进行了归纳和展望。
