一种嵌套移动路由器的转交地址配置方法

嵌套移动路由器的转交地址配置及随后的重复地址检查对网络移动的时间开销较大。为此,在分析现有移动路由器的转交地址配置方案基础上,提出一种基于接入路由器树模型和Hash函数的嵌套移动路由器转交地址配置方法及其相应的切换算法,以减小时间开销和控制信令开销。仿真结果表明,与现有方案相比,该方法能够降低嵌套移动路由器的转交地址配置及相应切换的延时。     

支持路径选择与快速切换的移动网络接入路由器安全Mesh(英文)

性能一直是网络移动投入实际运营的瓶颈所在,而现有认证机制产生的延时使之雪上加霜.文中为多穴嵌套移动网络的接入路由器Mesh引入一种高效的双向认证机制,基于此提出最优路径选择算法和接入失效快速恢复算法,以提高移动网络的整体性能,尤其是延时的降低.文中,基于固定AAA基础设施和动态可信邻居的安全关联转移被用于减少路由器Mesh的认证延时,其行为评估机制降低了路由器攻击或欺骗对路径评价的影响;基于顶层接入路由器网络前缀的移动路由器转交地址配置被用于消除嵌套接入环境下的多角路由和隧道嵌套问题,而必要时临时隧道和反向路由头可以替代随切换而来的绑定过程以缩短切换延时,最后通过接入路由器评价生成到达Internet的最优路径.定性分析与仿真分析表明,由于异域网络间建立安全关联的高效性,加上行为评估、路径评估和快速切换产生的性能优化作用,文中的安全Mesh在吞吐量、传输延时和切换延时方面较同类方案更加高效.     

多穴嵌套网络移动的快速切换算法

链路容错是多穴嵌套移动网络的一个重要议题.在分析多穴嵌套移动网络存在的问题和回顾现有链路容错方案基础上,提出接入路由器树模型及其三类快速切换算法以确保当前会话在接入链路失效突发时的连续性.算法具有以下优点:(1)切换延时降低;(2)数据包利用率加大;(3)兼容原有网络移动协议,易于实现.算法的仿真结果表明,和现有的方案相比,本文算法的切换延时和相应的数据传输延时最小,可以实现链路容错.     

一种多路由器多接口的移动网络多宿方案

为了解决移动网络中移动路由器易出现的单点失效和性能瓶颈的问题,针对现有多宿方案不能同时处理多路由器和多接口混合多宿,以及需要修改网络内部节点等不足,提出了一种可以适用于混合多宿场景的移动网络多宿方案MM-NEMO。该方案定义了移动路由器外部接口常用的重要属性以及这些属性的维护方法,并通过多播技术在移动路由器之间动态地交换接口属性,使移动网络中所有外部接口的信息都以分布式存储的形式保存在每个移动路由器中;然后移动路由器对内部节点发起的通信使用基于信息熵的多属性决策机制进行最佳接口的选择、分配或重定向。特性分析表明,该方案可以同时满足多路由器、多接口以及混合场景的需求,并且对网络内部节点保持透明。仿真结果表明,该方案具有较低的端到端时延和较高的总吞吐量。     

嵌套移动网络中的路由优化研究

针对嵌套移动网络内部节点间通信的乒乓路由问题,提出一种基于绑定更新的路由优化方案。该方案利用绑定更新报文所携带的信息构筑嵌套域内移动路由器的路由信息,实现了嵌套移动网络内部移动路由的功能,有效解决乒乓路由问题,避免由于隧道嵌套而造成的带宽浪费。实验结果表明该方案是可行的。     

6LoWPAN嵌套移动网络路由优化方案*

提出一种6LoWPAN嵌套移动网络路由优化方案,在此方案中,6LoWPAN移动网络节点无须经过家乡代理也无须建立隧道即可与通信节点通信,节省了数据传输开销,缩短了数据传输延迟。提出了移动路由器转交地址的分层结构,根据此分层结构,提出了基于最短路径的移动路由器转交地址配置算法,缩短了数据传输延迟。从理论和仿真两个角度对所提出的路由优化方案的路由优化开销、路由延迟及路由代价等性能参数进行了比较分析,分析结果验证了本方案的有效性和高效性。     

一种对阶层式移动IPv6(HMIPv6)的优化方案

本文在阶层式移动IPv6框架的基础上提出了一种新方案.引入候选接入路由器信息发现（CARID）机制,从移动检测、配置新链路地址两个环节缩短转交延时.同时,引入候选移动锚点信息发现（CMAPID）机制,加快移动锚节点（MAP）发现,提高移动节点在MAP域间移动时的绑定更新速度.该方案提高了移动IPv6对语音等实时通信的支持能力,实现了对移动IPv6的优化.     

移动IPv6网络安全接入认证方案

对于移动IPv6网络,身份认证是网络安全的关键问题之一.针对移动IPv6网络的接入认证,提出了一种基于移动互联网双向认证方案.在移动切换过程中的接入认证和家乡注册,采用对家乡注册消息进行基于双私钥签名的方式,实现了家乡代理和移动节点分别对注册消息的签名,实现了接入认证与家乡注册的并发执行,移动用户和接入网络的一次交互实现了用户和接入域的有效双向认证.理论分析和数据结果表明,方案的认证总延时和切换延时要优于传统方法,有效地降低了系统认证的延时.安全性分析表明,框架中的基于双私钥的CPK方案满足双向接入认证安全,有效地解决了密钥托管问题.     

基于HMIPv6的民用航空移动网络设计及实现

当一个移动节点(MN)或移动路由器(MR)移动到另一个移动网络,并通过另一个MR提供接入时,这样的情况称为嵌套移动网络,这样的嵌套可以有很多层。一个典型的例子是携带笔记本电脑的乘客登上一架通过MR提供移动网络服务的航班,并通过该MR访问互联网或公司的内部网络。在这种情况下,移动节点和通信节点之间的数据包的传送路径将到达每个节点的HA(家乡代理)处,因此其路径将比基本的MIP(移动IP)长得多,现有路由优化方法不能解决这个问题,因为可以旁路MN的HA,但是却无法跳过MR的HA。本文通过在民航移动网络的设计中应用HMIP(层次移动IP)思想,并对其进行一定的改进来解决上面的这些问题,提高网络的运行效率。     

移动网络接入认证方法的研究

随着移动网络技术的快速发展,越来越多的电子、IP设备以移动的方式应用到移动网络中.然而,当移动路由器(或其他移动客户端)移动到外地后,存在着外地服务提供者(外地的固定接入路由器)对服务请求者(移动路由器、移动节点等)的鉴别和信任问题.对现有的一些网络认证协议以及移动网络工作原理进行了研究,并提出了一种方案实现了移动网络...     

Intra domain route optimization for ubiquitous network

The main advantage of a wireless network is user mobility, which calls for efficient routing support at the network layer. An architecture combines hierarchical mobile IPv6 and network mobility for a network mobile and mobile nodes move in tandem and make a hierarchy in the wireless network to management of micro-mobility and seamless handoff. But the capability of the architecture for intra domain route optimization is impaired. So we propose functionality in domain nodes to enable intra domain path optimization for ubiquitous network. It is shown that intra domain cost effect is beneficial in every hierarchical domain that spans mesh network topology. We address the key function for our proposed scheme and analyze the usefulness of our proposed method using mathematically. We show that our proposed scheme performs much better than Network Mobility protocol, especially when the number of mobile nodes or mobile routers or correspondent nodes increases in hierarchically nested in ubiquitous networks.     

ROAD+: Route Optimization with Additional Destination-Information and Its Mobility Management in Mobile Networks

In the NEtwork MObility(NEMO) environment,mobile networks can form a nested structure.In nested mobile networks that use the NEMO Basic Support(NBS) protocol,pinball routing problems occur because packets are routed to all the home agents of the mobile routers using nested tunneling.In addition,the nodes in the same mobile networks can communicate with each other regardless of Internet connectivity.However,the nodes in some mobile networks that are based on NBS cannot communicate when the network is disc...     

带移动节点的无线传感器网络时间同步方法

为提高无线传感器网络中节点间时间同步的精度并且降低节点能量消耗,提出了一种基于移动节点与静态节点混合网络的时间同步方法.先建立一个带移动的节点的分簇网络结构,再结合发送者一接受者与改进的发送者一发送者两种同步模型从多个移动节点同时发起同步.通过数学分析和仿真得出该同步方法在同步时间精度和节点节能方面具有良好的性能.     

Cellular universal IP for nested network mobility

In recent years, network mobility (NEMO) has been studied extensively due to its potential applications in military and public transportation. NEMO basic support protocol (NBSP), the current de facto NEMO standard based on mobile IPv6, can be readily deployed using the existing mobile IPv6 infrastructure. However, NBSP’s root in mobile IPv6, such as the need of care-of address (CoA) and tunneling, results in substantial performance overhead, generally known as route sub-optimality, in nested NEMO environments. This paper tackles this problem by proposing a scheme based on cellular universal IP (CUIP) to eliminate the need for CoA and tunneling in supporting nested network mobility. Using quantitative analysis, we show that the proposed scheme outperforms the existing nested NEMO schemes by multiple folds in terms of bandwidth overhead. We also show how IP fragmentation negatively impacts route optimality, and that the proposed scheme is inherently superior to the existing schemes in this regard. More importantly, while the scalability of the existing schemes generally deteriorates with the network size, the complexity of our proposed scheme is independent of the network size and thus is far more scalable. Our results show that the proposed scheme is particularly suitable for nested NEMO networks formed by mobile routers with random and ad hoc movement patterns.     

Improvement of battery lifetime in software-defined network using particle swarm optimization based cluster-head gateway switch routing protocol with fuzzy rules

The software-defined network (SDN) is one of the network architectures, in which the data plane and control plane is divided from each other, and the network can be handled using a sensibly centralized controller and this method is adopted to reconfigure the wireless sensor network automatically. In this article, to implement the SDN in MANET, in which control nodes can be chosen in SDN dynamically for the activation of MANET function to allocate the works to other mobile nodes to the base station. However, in the field of mobile ad hoc networks, the network lifetime, and battery lifetime is one of the major problems and the energy consumption can play a significant rule for the transmission of data in the SDN. Therefore, in this article, particle swarm optimization (PSO) based CGSR (cluster-head gateway switch routing protocol) algorithm with fuzzy rules is proposed to increase the network lifetime of battery powered mobile nodes by reducing the energy consumptions of each node in software-defined MANET. In this proposed method, a routing method that can permit various mobile nodes with low battery power to transmits the data from source node to base station. We design a PSO based CGSR routing protocol by selecting the routing mobile nodes using fuzzy rules for packet transmission. In CGSR process, the formation of cluster and selection of cluster head is executed depending on the particle swarm optimization method. This proposed routing protocol can be used to enhance the battery lifetime by extension of the network lifetime with numerical analysis for efficient route node selection.     

基于虚拟力的混合感知网节点部署

感知网一般是由静态的或移动的节点组成,为保证感知网的感知功能,节点应该有自部署和自修复能力.然而全部由移动传感器组成的感知网的成本太高,为保证感知网的覆盖功能和低成本,提出了一种在静态传感器节点中加入移动传感器节点的混合感知网形式.为了更好地部署这些节点,最大化覆盖待感知区域,提出了一种基于节点间虚拟力的移动节点部署方法,利用静态节点和移动节点以及移动节点之间的虚拟人工势场产生的作用力来控制移动节点的运动,使移动节点能够在较短的时间内,以较少的能量消耗到达自己合适的位置.在理论上分析了算法的可行性,用仿真实验验证了此算法的有效性,并和其他3种类似算法进行了性能比较.     

NEMO移动网络及其路由优化技术

网络移动（Network Mobility，NEMO）主要研究子网作为一个整体在全球互联网范围内移动过程中存在的网络可达性、效率和安全等方面的问题。本文介绍了NEMO基本支持协议以及嵌套NEMO网络的模型。在此基础上分析了当前几种嵌套NEMO网络的路由优化方案存在的问题，并给出了一个改进的路由优化方案。最后总结了当前NEMO网络部署中存在的问题。     

无线传感器网络移动Agent的应用

节点计算模式对网络性能影响很大。移动Agent计算模式在下一代网络中具有广阔应用前景。该文分析了移动Agent在无线传感器网络中的应用背景。从网络和节点两个层面提出一种基于移动Agent的传感器网络框架模型,阐述了模型组成、功能定义和交互接口等。给出一种基于定向扩散的移动Agent机制实现方法,并对其特点进行了分析和讨论。     

Energy efficient secure data collection with path-constrained mobile sink in duty-cycled unattended wireless sensor network

This paper addresses the problem of secure data transmission and balanced energy consumption in an unattended wireless sensor network (UWSN) comprising of multiple static source nodes and a mobile sink in the presence of adversaries. The proposed system comprises of three phases: the identification of data collection points (convex nodes), path planning by the mobile sink, and secure data transmission. An energy-aware convex hull algorithm is used for the identification of data collection points for data transmission to the mobile sink. Data transmission from sensor nodes to the nearest data collection point is performed using multihop communication and from sensor nodes to the mobile sink in a single hop. Data are securely transmitted through an elliptic curve cryptography based ElGamal scheme for message authentication. A data packet is associated with a digital signature. The variation in a digital signature and threshold energy obtained using support vector machine is used to determine the presence of malicious nodes in the network. The performance of the proposed system is evaluated using Cooja simulator by Contiki for various node counts under a static sink and mobile sink, with different threat scenarios. The results indicate that the proposed system is resilient against threats and provides satisfactory performance