The pursuit of the higher performance mobile communications forces the emergence of the fifth generation mobile communication(5G). 5G network, integrating wireless and wired domain, can be qualified for the complex vi...The pursuit of the higher performance mobile communications forces the emergence of the fifth generation mobile communication(5G). 5G network, integrating wireless and wired domain, can be qualified for the complex virtual network work oriented to the cross-domain requirement. In this paper, we focus on the multi-domain virtual network embedding in a heterogeneous 5G network infrastructure, which facilitates the resource sharing for diverse-function demands from fixed/mobile end users. We proposed the mathematical ILP model for this problem.And based on the layered-substrate-resource auxiliary graph and an effective six-quadrant service-type-judgment method, 5G embedding demands can be classified accurately to match different user access densities. A collection of novel heuristic algorithms of virtual 5G network embedding are proposed. A great deal of numerical simulation results testified that our algorithm performed better in terms of average blocking rate, routing latency and wireless/wired resource utilization, compared with the benchmark.展开更多
大量分布式电源并网后需充分挖掘系统中需求侧资源参与调节,达到降低需求侧用电成本和提高配电网运营收益的目的。5G基站数量快速增长,其不间断电源(uninterruptible power supply,UPS)已成为配电网重要的需求侧资源,考虑到5G基站数量众...大量分布式电源并网后需充分挖掘系统中需求侧资源参与调节,达到降低需求侧用电成本和提高配电网运营收益的目的。5G基站数量快速增长,其不间断电源(uninterruptible power supply,UPS)已成为配电网重要的需求侧资源,考虑到5G基站数量众多,利用闵可夫斯基和聚合UPS作为虚拟电厂(virtual power plant,VPP)参与配电网调节,在需求侧激励中加入VPP跟踪准负荷曲线相似度的奖励机制,提高VPP参与调节的积极性。考虑到基站和配电网分属不同利益主体,两者存在利益冲突,构建5G基站参与配电网调节的分布式优化调度模型,模型分为配电网侧和VPP侧2个优化子问题,采用自适应松弛惩罚参数的交替方向乘子法(alternating direction method of multipliers,ADMM)对各子问题进行分布式求解,实现两者利益最大化。实际算例仿真结果表明,所提模型能够降低5G基站运行成本,提高配电网运行经济性。展开更多
In this work,a frame work for time-varying channel modeling and simulation is proposed by using neural network(NN)to overcome the shortcomings in geometry based stochastic model(GBSM)and simulation approach.Two NN mod...In this work,a frame work for time-varying channel modeling and simulation is proposed by using neural network(NN)to overcome the shortcomings in geometry based stochastic model(GBSM)and simulation approach.Two NN models are developed for modeling of path loss together with shadow fading(SF)and joint small scale channel parameters.The NN models can predict path loss plus SF and small scale channel parameters accurately compared with measurement at 26 GHz performed in an outdoor microcell.The time-varying path loss and small scale channel parameters generated by the NN models are proposed to replace the empirical path loss and channel parameter random numbers in GBSM-based framework to playback the measured channel and match with its environment.Moreover,the sparse feature of clusters,delay and angular spread,channel capacity are investigated by a virtual array measurement at 28 GHz in a large waiting hall.展开更多
为提高5G通信网络在电力物联网中的部署效果,确保电力通信负荷对网络可靠性的要求,文章结合具体案例,对电力5G通信网络的可靠性组网策略以及具体部署技术的应用进行分析研究,其中可靠性组网策略包括网络架构设计、网状网络与星形网络对...为提高5G通信网络在电力物联网中的部署效果,确保电力通信负荷对网络可靠性的要求,文章结合具体案例,对电力5G通信网络的可靠性组网策略以及具体部署技术的应用进行分析研究,其中可靠性组网策略包括网络架构设计、网状网络与星形网络对比以及关键技术应用,具体部署技术应用包括频谱资源配置调度、基站位置选择和覆盖范围评估以及软件定义网络(Software Defined Network,SDN)和网络功能虚拟化(Network Function Virtualization,NFV)在电力5G通信网络中应用,旨在进一步提高电力5G通信网络的可靠性,提高部署科学性,为发展我国新型电力系统提供良好思路。展开更多
基金supported in part by Open Foundation of State Key Laboratory of Information Photonics and Optical Communications (Grant No. IPOC2014B009)Fundamental Research Funds for the Central Universities (Grant Nos. N130817002, N150401002)+1 种基金Foundation of the Education Department of Liaoning Province (Grant No. L2014089)National Natural Science Foundation of China (Grant Nos. 61302070, 61401082, 61471109, 61502075, 91438110)
文摘The pursuit of the higher performance mobile communications forces the emergence of the fifth generation mobile communication(5G). 5G network, integrating wireless and wired domain, can be qualified for the complex virtual network work oriented to the cross-domain requirement. In this paper, we focus on the multi-domain virtual network embedding in a heterogeneous 5G network infrastructure, which facilitates the resource sharing for diverse-function demands from fixed/mobile end users. We proposed the mathematical ILP model for this problem.And based on the layered-substrate-resource auxiliary graph and an effective six-quadrant service-type-judgment method, 5G embedding demands can be classified accurately to match different user access densities. A collection of novel heuristic algorithms of virtual 5G network embedding are proposed. A great deal of numerical simulation results testified that our algorithm performed better in terms of average blocking rate, routing latency and wireless/wired resource utilization, compared with the benchmark.
文摘大量分布式电源并网后需充分挖掘系统中需求侧资源参与调节,达到降低需求侧用电成本和提高配电网运营收益的目的。5G基站数量快速增长,其不间断电源(uninterruptible power supply,UPS)已成为配电网重要的需求侧资源,考虑到5G基站数量众多,利用闵可夫斯基和聚合UPS作为虚拟电厂(virtual power plant,VPP)参与配电网调节,在需求侧激励中加入VPP跟踪准负荷曲线相似度的奖励机制,提高VPP参与调节的积极性。考虑到基站和配电网分属不同利益主体,两者存在利益冲突,构建5G基站参与配电网调节的分布式优化调度模型,模型分为配电网侧和VPP侧2个优化子问题,采用自适应松弛惩罚参数的交替方向乘子法(alternating direction method of multipliers,ADMM)对各子问题进行分布式求解,实现两者利益最大化。实际算例仿真结果表明,所提模型能够降低5G基站运行成本,提高配电网运行经济性。
基金supported by the National Nature Science Foundation of China(NSFC)under grant No.61771194supported by Key Program of Beijing Municipal Natural Science Foundation with No.17L20052
文摘In this work,a frame work for time-varying channel modeling and simulation is proposed by using neural network(NN)to overcome the shortcomings in geometry based stochastic model(GBSM)and simulation approach.Two NN models are developed for modeling of path loss together with shadow fading(SF)and joint small scale channel parameters.The NN models can predict path loss plus SF and small scale channel parameters accurately compared with measurement at 26 GHz performed in an outdoor microcell.The time-varying path loss and small scale channel parameters generated by the NN models are proposed to replace the empirical path loss and channel parameter random numbers in GBSM-based framework to playback the measured channel and match with its environment.Moreover,the sparse feature of clusters,delay and angular spread,channel capacity are investigated by a virtual array measurement at 28 GHz in a large waiting hall.
文摘为提高5G通信网络在电力物联网中的部署效果,确保电力通信负荷对网络可靠性的要求,文章结合具体案例,对电力5G通信网络的可靠性组网策略以及具体部署技术的应用进行分析研究,其中可靠性组网策略包括网络架构设计、网状网络与星形网络对比以及关键技术应用,具体部署技术应用包括频谱资源配置调度、基站位置选择和覆盖范围评估以及软件定义网络(Software Defined Network,SDN)和网络功能虚拟化(Network Function Virtualization,NFV)在电力5G通信网络中应用,旨在进一步提高电力5G通信网络的可靠性,提高部署科学性,为发展我国新型电力系统提供良好思路。
