与室外定位技术相比(如GPS),基于无线局域网(Wireless Area Network)的定位更适用于室内环境。两种基于接收信号强度(RSSI,Received Signal Strength Indication)的定位方法即位置指纹法和信号传播模型法广泛用于室内定位的研究。使用...与室外定位技术相比(如GPS),基于无线局域网(Wireless Area Network)的定位更适用于室内环境。两种基于接收信号强度(RSSI,Received Signal Strength Indication)的定位方法即位置指纹法和信号传播模型法广泛用于室内定位的研究。使用边界盒算法和改进的二分范围搜索算法将两种室内定位方法相结合,提出了一种改进的基于RSSI的定位方法。提出的方法根据指纹数据库中样本的横纵坐标对其进行预处理,同时使用改进的线性二分范围搜索算法降低指纹数据库中的样本数,进而提高实时定位过程的效率。最大化位置指纹维度,并添加时间维,同时通过实验数据阐明所提出的方法可提高用户位置估算的精确度。展开更多
探讨基于网络功能虚拟化(Network Function Virtualization,NFV)构架的5G局域网(Local Area Network,LAN)技术的应用价值,首先介绍NFV技术概念、网络构架及其优缺点,其次根据垂直行业局域网的业务需求引入5G LAN技术,再次介绍5G LAN中V...探讨基于网络功能虚拟化(Network Function Virtualization,NFV)构架的5G局域网(Local Area Network,LAN)技术的应用价值,首先介绍NFV技术概念、网络构架及其优缺点,其次根据垂直行业局域网的业务需求引入5G LAN技术,再次介绍5G LAN中VN组管理、二层和三层接入模型以及5G LAN流量转发技术,最后总结出基于NFV构架的5G LAN整体优点和仍需要进一步重点解决的问题。展开更多
For wired local area networks(LANs),their effectiveness and invulnerability are very critical.It is extraordinarily significant to evaluate the network performance effectively in the design of a reasonable network top...For wired local area networks(LANs),their effectiveness and invulnerability are very critical.It is extraordinarily significant to evaluate the network performance effectively in the design of a reasonable network topology and the performance improvement of the networks.However,there are many factors affecting the performance of the networks,and the relation among them is also complicated.How to evaluate the performance of the wired LANs more accurately has been a heavy challenge in the network research.In order to solve the problem,this paper presents a performance evaluation method that evaluates the effectiveness and invulnerability of the wired LANs.Compared to traditional statistical methods,it has the distinct advantage of being able to handle several dependent variables simultaneously and tolerates the measurement errors among these independent variables and dependent variables.Finally,the rationality and validity of this method are verified by the extensive experimental simulation.展开更多
IPX is one of most widely used protocol of datagram in LAN. It will have the great significance and find its wide use to design a powerful Electronic Mail System (EMAIL) on IPX protocol. This paper analyzes the access...IPX is one of most widely used protocol of datagram in LAN. It will have the great significance and find its wide use to design a powerful Electronic Mail System (EMAIL) on IPX protocol. This paper analyzes the access interface of the IPX protocol at first, then accounts for the design thought of the LAN electronic Mail Systrm and the design of ist upper four layers protocols and software on emphasis.展开更多
为解决计算机网络面临的数据隐私、终端性分布不均等问题,扩大计算机网络的应用范围,结合局域网(Local Area Network,LAN)环境研究计算机网络安全技术的有效应用。由于局域网是互联网的重要组成部分之一,要想保证计算机网络的安全应当...为解决计算机网络面临的数据隐私、终端性分布不均等问题,扩大计算机网络的应用范围,结合局域网(Local Area Network,LAN)环境研究计算机网络安全技术的有效应用。由于局域网是互联网的重要组成部分之一,要想保证计算机网络的安全应当加强对安全技术、数据加密技术等技术的应用。基于此,提出了一种基于局域网环境的网络安全体系设计,以期为局域网中的计算机网络安全发展提供相应的参考。展开更多
文摘与室外定位技术相比(如GPS),基于无线局域网(Wireless Area Network)的定位更适用于室内环境。两种基于接收信号强度(RSSI,Received Signal Strength Indication)的定位方法即位置指纹法和信号传播模型法广泛用于室内定位的研究。使用边界盒算法和改进的二分范围搜索算法将两种室内定位方法相结合,提出了一种改进的基于RSSI的定位方法。提出的方法根据指纹数据库中样本的横纵坐标对其进行预处理,同时使用改进的线性二分范围搜索算法降低指纹数据库中的样本数,进而提高实时定位过程的效率。最大化位置指纹维度,并添加时间维,同时通过实验数据阐明所提出的方法可提高用户位置估算的精确度。
文摘探讨基于网络功能虚拟化(Network Function Virtualization,NFV)构架的5G局域网(Local Area Network,LAN)技术的应用价值,首先介绍NFV技术概念、网络构架及其优缺点,其次根据垂直行业局域网的业务需求引入5G LAN技术,再次介绍5G LAN中VN组管理、二层和三层接入模型以及5G LAN流量转发技术,最后总结出基于NFV构架的5G LAN整体优点和仍需要进一步重点解决的问题。
基金supported by the National Natural Science Foundations of China (Nos.61572435,61472305, 61473222)the Ningbo Natural Science Foundations(Nos. 2016A610035,2017A610119)+1 种基金the Complex Electronic System Simulation Laboratory (No.DXZT-JC-ZZ-2015015)the Joint Fund of China State Shipbuilding Corporation(No.6141B03010103)
文摘For wired local area networks(LANs),their effectiveness and invulnerability are very critical.It is extraordinarily significant to evaluate the network performance effectively in the design of a reasonable network topology and the performance improvement of the networks.However,there are many factors affecting the performance of the networks,and the relation among them is also complicated.How to evaluate the performance of the wired LANs more accurately has been a heavy challenge in the network research.In order to solve the problem,this paper presents a performance evaluation method that evaluates the effectiveness and invulnerability of the wired LANs.Compared to traditional statistical methods,it has the distinct advantage of being able to handle several dependent variables simultaneously and tolerates the measurement errors among these independent variables and dependent variables.Finally,the rationality and validity of this method are verified by the extensive experimental simulation.
文摘IPX is one of most widely used protocol of datagram in LAN. It will have the great significance and find its wide use to design a powerful Electronic Mail System (EMAIL) on IPX protocol. This paper analyzes the access interface of the IPX protocol at first, then accounts for the design thought of the LAN electronic Mail Systrm and the design of ist upper four layers protocols and software on emphasis.
文摘为解决计算机网络面临的数据隐私、终端性分布不均等问题,扩大计算机网络的应用范围,结合局域网(Local Area Network,LAN)环境研究计算机网络安全技术的有效应用。由于局域网是互联网的重要组成部分之一,要想保证计算机网络的安全应当加强对安全技术、数据加密技术等技术的应用。基于此,提出了一种基于局域网环境的网络安全体系设计,以期为局域网中的计算机网络安全发展提供相应的参考。
