To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is di...To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is divided into clusters based on the equivalent cell principle.Then,we transfer global optimization into a group of subproblems.Second,a joint processing-based cooperative cell selection model is constructed to determine cooperative cells and dormant cells.Third,the compensative cells with a determined threshold are selected to control users' access.Finally,a simulation is implemented in Matlab.Results show that the energy-saving rate can reach 36.4% and that the mechanism meets the network coverage requirement.Thus,joint processing can be effectively applied in an energy saving mechanism and used to improve the network performance of edge users without increasing transmission power.展开更多
针对典型蜂窝网络LTE-A网络的切换认证问题,本文通过引入SDN(Software Defined Network,软件定义网络),提出了软件定义LTE-A异构网络架构,在中心控制器中共享UE(User Equipment,用户设备)的安全上下文信息,以实现简化切换认证过程,提高...针对典型蜂窝网络LTE-A网络的切换认证问题,本文通过引入SDN(Software Defined Network,软件定义网络),提出了软件定义LTE-A异构网络架构,在中心控制器中共享UE(User Equipment,用户设备)的安全上下文信息,以实现简化切换认证过程,提高认证效率的目标.中心控制器的加入,使蜂窝与核心网通信时需要增加一次信令开销,而LTE-A网络的标准切换认证方法过于复杂,应用在软件定义LTE-A异构网络中,会产生较多的信令开销.基于代理签名的切换认证方法,使UE在验证身份时不用经过核心网,减少了信令开销.在安全性相同的情况下,基于椭圆曲线的加密体系比基于RSA的加密体系计算量更小,有利于减少中心控制器的计算压力.本文采用椭圆曲线代理签名方法,提出了一种新型的切换认证协议,并运用着色Petri网进行建模和仿真分析.仿真结果表明,该协议是有效的,且安全性更高.展开更多
提出了一种在LTE-A(long term evolution advanced,长期演进技术增强)技术下的无线资源管理跨层模型,阐述了模型的基本功能特征。以博弈论为依据,分析了无线网络资源的分配方式,并根据无线网络资源和系统协议栈中各层之间的联系,通过设...提出了一种在LTE-A(long term evolution advanced,长期演进技术增强)技术下的无线资源管理跨层模型,阐述了模型的基本功能特征。以博弈论为依据,分析了无线网络资源的分配方式,并根据无线网络资源和系统协议栈中各层之间的联系,通过设计跨层结构,使各层博弈的目标统一。提出的理论模型面向多种无线网络资源,涉及多个无线网络协议栈层,实现了无线资源的综合管理以及各层之间的联合优化。展开更多
基金partially supported by the National Natural Science Foundation of China(61271187)the "863" Project (2014AA01A701)+2 种基金the Provincial Natural Science Foundation of China(20122BAB211039)the PAPD fundthe CICAEET fund
文摘To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is divided into clusters based on the equivalent cell principle.Then,we transfer global optimization into a group of subproblems.Second,a joint processing-based cooperative cell selection model is constructed to determine cooperative cells and dormant cells.Third,the compensative cells with a determined threshold are selected to control users' access.Finally,a simulation is implemented in Matlab.Results show that the energy-saving rate can reach 36.4% and that the mechanism meets the network coverage requirement.Thus,joint processing can be effectively applied in an energy saving mechanism and used to improve the network performance of edge users without increasing transmission power.
文摘针对典型蜂窝网络LTE-A网络的切换认证问题,本文通过引入SDN(Software Defined Network,软件定义网络),提出了软件定义LTE-A异构网络架构,在中心控制器中共享UE(User Equipment,用户设备)的安全上下文信息,以实现简化切换认证过程,提高认证效率的目标.中心控制器的加入,使蜂窝与核心网通信时需要增加一次信令开销,而LTE-A网络的标准切换认证方法过于复杂,应用在软件定义LTE-A异构网络中,会产生较多的信令开销.基于代理签名的切换认证方法,使UE在验证身份时不用经过核心网,减少了信令开销.在安全性相同的情况下,基于椭圆曲线的加密体系比基于RSA的加密体系计算量更小,有利于减少中心控制器的计算压力.本文采用椭圆曲线代理签名方法,提出了一种新型的切换认证协议,并运用着色Petri网进行建模和仿真分析.仿真结果表明,该协议是有效的,且安全性更高.
文摘提出了一种在LTE-A(long term evolution advanced,长期演进技术增强)技术下的无线资源管理跨层模型,阐述了模型的基本功能特征。以博弈论为依据,分析了无线网络资源的分配方式,并根据无线网络资源和系统协议栈中各层之间的联系,通过设计跨层结构,使各层博弈的目标统一。提出的理论模型面向多种无线网络资源,涉及多个无线网络协议栈层,实现了无线资源的综合管理以及各层之间的联合优化。
