基于博弈论的无线自组网路由协议研究

Ad hoc网络,是无线自组织网络的简称.它没有固定的基础设施,网路中的每个节点具有双重身份,即通信终端和路由器.路由协议是Ad hoc网络的关键技术,但传统的协议在设计时并未考虑效率因素.本文基于博弈论提出一种平均场均衡的方法,能有效的减少信息泛洪,以满足节点移动性对自组网的性能要求.     

自组织网络的监测和管理体系结构

自组织网络因具有灵活、无中心、自组织、可扩展性强和负载均衡等优势,具有很广泛的应用前景,同时对其网络管理也提出了一定的要求.本文在研究自组织的通信机制和网络协议的基础上,提出了基于自组织的分布式网络监测、管理和控制的体系结构,能很好地适用于动态自组织网络的管理,并可作为目前复杂多变的网络环境的管理模型.     

战术通信网络的资源管理技术研究

战术通信网络是一种无线多跳自组织网络,未来的战术通信网络向全IP技术体制演进已成为一种必然趋势,而在全IP技术体制下,如何管理网络资源以及提高业务的QoS,是急需解决的问题。针对该问题,提出了一种全新的跨层协作的资源管理解决思路。首先对资源管理的总体框架和思路进行了详细的描述,然后就资源管理的关键技术从三个方面进行了分析并提出了解决思路,最后搭建了战术通信网络的典型仿真模型并对资源管理技术进行了仿真验证。     

一种自组织模糊神经网络控制器的研究

采用自组织模糊神经网络充分融合模糊控制和神经网络控制的优点,应用于电力变换器的潮流控制中,通过仿真对比,实验表明它具有自组织和在线学习能力以及设计上不依赖被控制对象数学模型的特点,具有很好的追踪控制能力和鲁棒性,达到了较好控制效果.     

Architectural and technological issues for future optical Internetnetworks

This article reports a review of the most significant issues related to network architectures and technologies which will enable the realization of future optical Internet networks. The design of such networks has to take into consideration the peculiar characteristics of Internet traffic. Several architectures have been proposed to provide optical networking solutions, based on wavelength-division multiplexing and compatible with the IP world. These architectures are presented briefly, and the main advantages and drawbacks are discussed. Furthermore, advanced network architectures are reported. In particular, two network paradigms are illustrated and discussed: the optical transparent packet network and optical burst switching. Finally, the key technologies are illustrated     

基才ZigBee的自愈自组网的设计与应用

ZigBee技术为低功耗、低成本、低复杂度、适中数据传输率和且具有自组织功能的无线监控网络的组建提供了坚实的技术基础。为了增强无线网络在无人值守、远程监控等应用中的稳定性及智能化,本文在分析ZigBee协议体系结构以及Z_Stack协议栈基础上,研究了如何基于CC2530组建具有自组网、自愈特性的ZigBee无线网络,通过对无人值守的通信基站的交流电压、电流和温湿度环境等参数的远程实时监控的试验,实现了网络的自组网与自愈功能,增强了网络的稳定性及智能化。     

MIL-STD-188-220C多跳网络快速收敛的研究

运行MIL-STD-188-220C协议的网络是一种典型的无线多跳自组网。节点移动后如何快速地收敛,以减少网络拓扑改变后节点路由寻径的时间,已经成为当前无线自组网研究的一个热点问题。本文针对MIL-STD-188-220C路由协议的拓扑数据组织特点,提出一种应用于MIL-STD-188-220C多跳网络拓扑改变后快速收敛的方案,并通过分析和仿真验证,有效地提高网络的性能。     

无线自组织网络关键技术与进展

无线自组织网络在军事和民用方面正在获得迅速的进展,但由于其本身固有的特点,仍然有很多问题和关键技术亟需解决。这些问题和关键技术包括MAC协议中的隐暴终端、单向链路问题,具有良好适应性和鲁棒性的路由协议研究,设计完善的跨层协同技术,具有可扩展性的无线自组织网络体系结构等。     

短波自组织网络HFMACA协议研究

在研究无线多路访问碰撞回避协议MACAW的基础上,针对短波无线自组织网络的分布式控制、网络拓扑结构动态变化、存在隐藏终端和暴露终端等特点,对MACAW进行了适当改进,提出了短波多路访问碰撞回避协议HFMACA,详细介绍了其基本思想、运行机制,并对其网络容量、业务成功率、业务传输时延等性能进行了仿真分析,给出了网络业务量与业务成功率及传输时延之间的关系,对短波自组织网MAC协议的研究和设计具有一定的参考意义。     

自组织层次式大规模网络入侵检测系统

在分析现有分布式入侵检测系统拓扑结构基础上，设计实现了自组织的层次式大规模网络入侵检测系统。该系统提出入侵检测节点之间自组织的概念，使用组织服务器来将分布式入侵检测系统的检测功能与组织功能分离开来，降低系统实现复杂性，并使系统中不再存在单点失败，当系统中部分检测节点失效后，系统的其余部分仍能够有效的工作。针对网络入侵检测节点，实现了一个完整的协议还原平台。在实际运行中，取得了良好的效果。     

无线自组织网络的网络编码技术

网络编码作为一种新的技术在宽带无线自组织网络中有很好的应用,通过网络编码,中间节点可以将接收信息进行编码并发送出去,提高了网络吞吐量和健壮性。为不对现有网络的软硬件设备和相应的协议做很大的修改,可以选择在高层实现网络编码。无线传感器网络、无线格状网（Mesh）等无线自组织网络都可以使用网络编码技术显著提高多跳链路的传输性能。目前网络编码的研究热点集中在网络编码节点选取方案、网络编码算法的设计、网络编码复杂度分析、网络编码的性能分析、网络编码与系统安全性分析、网络编码在无线分布式网络中的应用等方面。     

A quadratic optimization method for connectivity and coverage control in backbone-based wireless networks

The use of directional wireless communications to form flexible mesh backbone networks, which provide broadband connectivity to capacity-limited wireless networks or hosts, promises to circumvent the scalability limitations of traditional homogeneous wireless networks. The main challenge in the design of directional wireless backbone (DWB) networks is to assure backbone network requirements such as coverage and connectivity in a dynamic wireless environment. This paper considers the use of mobility control, as the dynamic reposition of backbone nodes, to provide assured coverage-connectivity in dynamic environments. This paper presents a novel approach to the joint coverage-connectivity optimization problem by formulating it as a quadratic minimization problem. Quadratic cost functions for network coverage and backbone connectivity are defined in terms of the square distance between neighbor nodes, which are related to the actual energy usage of the network system. Our formulation allows the design of self-organized network systems which autonomously achieve energy minimizing configurations driven by local forces exerted on network nodes. The net force on a backbone node is defined as the negative energy gradient at the location of the backbone node. A completely distributed algorithm is presented that allows backbone nodes to adjust their positions based on information about neighbors’ position only. We present initial simulation results that show the effectiveness of our force-based mobility control algorithm to provide network configurations that optimize both network coverage and backbone connectivity in different scenarios. Our algorithm is shown to be adaptive, scalable and self-organized.     

Polymorphic Architectures for Optical Networks and their Seamless Evolution towards Next Generation Networks

This paper proposes a novel polymorphic framework for optical networking and a seamless evolution path from optical circuit-switched towards optical packet-switched networks. We show that by simultaneously supporting several optical switching paradigms in a single physical topology, efficient and flexible optical networks can be built. The supported paradigms are associated with different Classes of Service (CoS) in order to provide service differentiation at the optical layer. Two polymorphic architectures are presented, one based on optical circuit switching paradigms with different grades of dynamism, and a second one based on optical labeled burst-switched networks with the added capability of dynamic lightpath provisioning. These architectures provide a seamless evolution path towards an efficient IP-over-WDM approach with service differentiation. Moreover, the proposed polymorphic architectures are fully compatible with the GMPLS unified control plane. We present in a detailed form the proposed polymorphic framework, including the selection of switching paradigms, its support for CoS, the network and control architecture, and a possible seamless evolution towards optical packet-switched networks. Possible implementation examples of optical network nodes that support the proposed polymorphic architectures are also presented.     

基于嵌入式Linux平台的移动自组织网Internet接入方案及实现

随着通信技术的发展,移动自组织网络得到了越来越广泛的应用,同时多网的互联互通也是大势所趋.基于在分层移动自组织网中实现Internet接入的意义和功能,提出并实现了一种Internet接入方案.结合设计方案,介绍了基于Motorola公司的ColdFire嵌入式处理器MCF5272和uClinux操作系统所建立的系统软硬件平台.     

Designing power aware self-reconfiguring topology for mobile wireless personal area networks using fuzzy logic

In mobile wireless personal area networks (WPAN), the position of each node changes over time. A network protocol that is able to dynamically update its links in order to maintain strong connectivity is said to be "self-reconfiguring." We propose a mobile wireless personal area networks (WPAN) design method with self-reconfiguring protocol for power efficiency. The WPAN is self-organized to clusters using an unsupervised clustering method, fuzzy c-means. A fuzzy logic system is applied to master/controller election for each cluster. A self-reconfiguring topology is proposed to manage the mobility and recursively update the network topology. We also modify the mobility management scheme with hysteresis to overcome the ping-pong effect. Simulation results show that our scheme performs much better than the existing algorithm.     

Ad hoc网络体系结构研究

Ad hoc网络是一种有特殊用途的对等式网络,具有无中心、自组织、可快速展开、可移动等特点,这些特点使得它在战场、救灾等特殊场合的应用日渐受到人们的重视,本文首先分析了Ad hoc网络的特点和对协议的特殊需求,然后对网络结构和路由协议作了详细分析和讨论,并得出了网络分级化趋势和使用混合式路由协议的建议。     

Proficient link state routing in mobile ad hoc network-based deep Q-learning network optimized with chaotic bat swarm optimization algorithm

Mobile ad-hoc network (MANET) is a category of ad-hoc network that can be reconfigurable its network. MANETS are self-organized networks, that can use the wireless links to connect various networks via mobile nodes: but it consumes more energy and it also has routing problems. This is the major drawback of being connected with the MANET technology. Therefore, this study proposes a new protocol as deep Q-learning network optimized with chaotic bat swarm optimization algorithm (CBS)-based optimized link state routing (OLSR) (CBS-OLSR) for MANET. This protocol reduces MANET energy usage and adopts OLSR multi-point relay (MPR) technology. MANET's OLSR and the CBS algorithm utilize a similar method to locate the best optimum path from source to destination node. By embedding the new improved deep Q-learning and OLSR algorithms, both are used for optimizing the MPR sets selection, it can efficiently diminish the energy consumption in the network topology, but automatically increase the lifespan of the network. It also enhances the package delivery ratio and decreases end-to-end delay. The experimental outcomes prove that the proposed protocol is reliable and proficient that is appropriate for numerous MANET applications.     

基于RBF神经网络的相关干涉仪测向方法

提出了一种新的基于径向基(RBF)神经网络的相关干涉仪测向方法,实现了自组织学习选取中心、正交最小二乘法及基于遗传算法的进化优选算法等训练方法,经训练后的RBF神经网络可用于多源信号波达角(DOA)估计。仿真结果表明,在一定范围内,该方法对信道噪声不敏感,测向精度与传统相关干涉仪相当,且测向处理时间和测向设备的存储量大大降低。     

Multimedia streaming in Multi-Homed Hybrid Ad Hoc Networks: A model of network connectivity

In this paper we consider the scenario of a Multi-Homed Hybrid Ad Hoc Network, which consists of self-organized and self-configured mobile nodes that make use of two or more fixed gateways to connect to the Internet. Accordingly, different network segments are formed, each one associated with a different gateway. A node can maintain its connectivity to the Internet when moving from a network to another by performing handover procedures and changing its gateway to the Internet. This scenario is quite interesting for its capacity of increasing the geographical extension of a single mobile network. Within this scenario we focus on the modelling of the node connectivity, which is of practical interest for the design of rate control algorithms for multimedia streaming systems. We consider a network structure with gateways placed in a honey cell structure, where nodes move according to the RDMM (Random Direction Mobility Model). We then derive the probabilities for a node to change the route to connect to the Internet and to handover from a network to another, which both cause service interruptions that heavily affect the quality in multimedia streaming services. Numerical results show the accuracy of the proposed theoretical model with respect to simulated data and reveal the benefits of the model in controlling playback buffer starvation occurrences during video streaming.     

数字电视自组织并播技术研究

对数字电视自组织并播技术进行了理论和缩比实验研究。根据统一内容定位(UCL,Uniform Content Locator)标引技术对内容进行识别的原理,确定了数字电视UCL信息标引框架和映射方案。在实验室构建的双网融合平台上设计了一种数字电视自组织并播系统,实现了按节目热度以固定速率、时分复用方式的16路节目的并播和客户端的数据解析。该系统有效地验证了自组织并播技术的可行性,为实际播存电视应用模型的设计积累必要的理论依据与实验数据。