An Aware-Scheduling Security Architecture with Priority-Equal Multi-Controller for SDN

Current SDN controllers suffer from a series of potential attacks. For example, malicious flow rules may lead to system disorder by introducing unexpected flow entries. In this paper, we propose Mcad-SA, an aware decision-making security architecture with multiple controllers, which could coordinate heterogeneous controllers internally as a "big" controller. This architecture includes an additional plane, the scheduling plane, which consists of transponder, sensor, decider and scheduler. Meanwhile it achieves the functions of communicating, supervising and scheduling between data and control plane. In this framework, we adopt the vote results from the majority of controllers to determine valid flow rules distributed to switches. Besides, an aware dynamic scheduling(ADS) mechanism is devised in scheduler to intensify security of Mcad-SA further. Combined with perception, ADS takes advantage of heterogeneity and redundancy of controllers to enable the control plane operate in a dynamic, reliable and unsteady state, which results in significant difficulty of probing systems and executing attacks. Simulation results demonstrate the proposed methods indicate better security resilience over traditional architectures as they have lower failure probability when facing attacks.

Theory and Application of Multi-robot Service-oriented Architecture

In order to solve the problem of heterogeneity in multi-robot cooperation, a new service-oriented architecture is proposed for multi-robot cooperation. Service provision and energy consumption are the basic cooperative behaviors. A set of basic concepts of robot service are proposed. A layered multi-robot service-oriented architecture is designed. Finally, the experiments illustrate the superiority of the proposed architecture which makes robot's underlying functional components be transparently encapsulated and the services in upper layer be transparently invoked, which will effectively avoid the impact of heterogeneous characteristics in multi-robot cooperation and facilitate the system construction, expansion, restructuring and maintenance. © 2014 Chinese Association of Automation.

A Study on the Architecture of Flexible ERP Based on Multi-Agent Technology

Traditional ERP software system cannot efficiently su pport new management ideas such as BPR, DEM and virtual enterprise which emphasi zes that enterprise should be adjusted to market changes and business process ch ain and value chain should be integrated tightly. To solve these problems, this paper proposed the conception of Flexible ERP system. F-ERP is a self- adapti ve software system based on multi-agent technology. It developed the followin g kind of agents which are useful for F-ERP: business process agent, interf ace agent, data agent and decision and analysis agent. The F-ERP software syste m is an hierarchy system which is composed of data layer, system tools layer, bu siness application layer and business decision layer. It used component based de velopment mythology and complied with CORBA to development F-ERP. The F-ERP sy stem can support the new management ideas such as BPR, DEM and virtual enterpris e etc. By implementation of it, enterprise can improve its management and promot e its competence.

Multi-Layer Tree Hierarchical Architecture Based on Web Service

To solve the problem of the information share and services integration in population information system, we propose a multi-layer tree hierarchical architecture. The command （Web Service Call） is recursively muhicast from top layer of tree to bottom layer of tree and statistical data are gatbered from bottom layer to top layer. We implemented the architecture by using Web Services technology. In our implementation, client program is the requestor of Web Services, and all leaf nodes of the last layer are only the provider of Web Services. For those nodes of intermediate layers, every node is not only the provider of Web Services, but also the dispatcher of Web Services. We take population census as an cxample to describe the working flow of the architecture.

Hierarchical Architecture for Enterprise Information System under Dynamic Environment

In a dynamic environment, it is vital for enterpris e to have flexible information system architecture to integrate ERP, Supply Chain Management (SCM) and E-Commerce (EC). The traditional systems are established o n the ERP-centered flat architecture. This architecture has some disadvantages in supporting the dynamics of enterprises. Firstly, ERP is already a very expens ive and complex system; the extension based on it can only increase the complexi ty and make the implementation more expensive and risky. Secondly, under the arc hitecture, the flexibility is reduced sharply although the execution efficiency is maintained. In a rapid changing environment, flexibility is also an equally i mportant factor besides execution efficiency. Thirdly, it cannot support the dyn amic collaboration efficiently. The prevailing of the flat architecture is not d ue to its advantage but to the big software providers. From the system viewpoint , a hierarchical architecture is proposed. Difference from the current architect ure, in the hierarchical paradigm, ERP is put in the bottom level rather centere d. SCM is the center system, which adopts a multi-agent structure. EC is regard ed as its foreground interface, while ERP and other information system of the pa rtner or internal units are the background executors. EC is the extension of mar ket agent and purchase agent. It fulfills the function of trade on Internet by s ending orders to be executed to SCM and receiving the progress information of th e orders from SCM. After receiving orders from EC, the agent in charge of schedu le in SCM makes preliminary plan in form of instructions (which may be infeasibl e) based on the information of source. Trough the coordination of multi agent, the plan is adjusted to be feasible. Compared with current ERP-centered flat ar chitecture, the hierarchical structure pays more attention to dynamic collaborat ion rather the optimization within the enterprise. At last, two engineering case s, Beijing Shang Pu Electric Ltd and Qingtao Tianyue International Building Mate rial Free Trade City, are presented to illustrate the idea.

Behavior-based dual dynamic agent architecture

The objective of the architecture is to make agent promptly and adaptively accomplish tasks in the real-time and dynamic environment. The architecture is composed of elementary level behavior layer and high level be-havior layer. In the elementary level behavior layer, the reactive architecture is introduced to make agent promptlyreact to events; in the high level behavior layer, the deliberation architecture is used to enhance the intelligence ofthe agent. A confidence degree concept is proposed to combine the two layers of the architecture. An agent decisionmaking process is also presented, which is based on the architecture. The results of experiment in RoboSoccer simu-lation team show that the proposed architecture and the decision process are successful.

Dynamic Identity Based Authentication Protocol for Two-Server Architecture

Most of the password based authentication protocols make use of the single authentication server for user's authentication. User's verifier information stored on the single server is a main point of susceptibility and remains an attractive target for the attacker. On the other hand, multi-server architecture based authentication protocols make it difficult for the attacker to find out any significant authentication information related to the legitimate users. In 2009, Liao and Wang proposed a dynamic identity based remote user authentication protocol for multi-server environment. However, we found that Liao and Wang's protocol is susceptible to malicious server attack and malicious user attack. This paper presents a novel dynamic identity based authentication protocol for multi-server architecture using smart cards that resolves the aforementioned flaws, while keeping the merits of Liao and Wang's protocol. It uses two-server paradigm by imposing different levels of trust upon the two servers and the user's verifier information is distributed between these two servers known as the service provider server and the control server. The proposed protocol is practical and computational efficient because only nonce, one-way hash function and XOR operations are used in its implementation. It provides a secure method to change the user's password without the server's help. In e-commerce, the number of servers providing the services to the user is usually more than one and hence secure authentication protocols for multi-server environment are required.

Multi-Agent技术及应用

论文主要讨论了Multi-Agent(MA)技术的体系结构、协作机制、通信模式及任务分解等关键技术,阐述了MA技术在智能交通控制系统、多机器人系统、Internet网络管理、CIMS领域、软件工程领域及计算机仿真等领域的广泛应用前景。

支持Multi-interface的MVC设计模式研究

支持多类型用户界面的复杂应用程序架构设计一直是困扰企业的难题 ,文章引入源于Smalltalk的MVC架构设计思想 ,提出了具有经济性、可扩展性、安全性等支持多类型用户界面复杂应用程序的新型MVC设计模式 。

基于Multi-Agent的高速公路集成交通控制系统

高速公路集成交通控制系统是一个非线性分布的动态复杂巨型系统。在智能控制系统分级递阶结构的基础上,提出了高速公路集成交通控制系统的集散递阶体系结构,并以Agent 作为各级智能控制器,建立了高速公路集成交通控制系统MAS模型,探讨了MAS中主体的结构模型、构造方法、通信机制和协商机制,为基于Multi Agent的高速公路集成交通控制系统的最终实现提供了理论指导和方法依据。

基于Multi-Agent的编队飞行卫星体系结构研究

卫星编队的自主运行与管理能够节约大量成本,并能充分发挥卫星编队的整体功能,是编队飞行的关键技术之一。Multi-Agent系统的一些基本特性正好满足了卫星编队自主性的需求,因此从Agent概念出发,分析了将Agent技术应用于卫星编队的优势,研究了基于Multi-Agent的卫星编队垂直分层体系结构,并详细描述了每个层中各子Agent的功能,最后给出了卫星编队的一般协同工作流程,并针对基于Multi-Agent编队飞行系统,提出了几项需要解决的关键技术。

支持Multi-interface的Java程序MVC设计模式研究

支持多类型用户界面的复杂应用程序架构设计一直是困扰企业的难题,文章引入源于Smalltalk的MVC架构设计思想,提出了具有经济性、可扩展性、安全性等支持多类型用户界面复杂应用程序的新型MVC设计模式,并分析了工作原理和性能特点。

实时分布式Multi-Agent控制理论的理想实现平台——现场总线控制系统

针对当前实时分布式 Multi- Agent控制理论缺乏赖以实现的通用系统平台现状 ,本文提出“将现场总线控制系统作为各种实时分布式 Multi- Agent控制理论实现的通用系统平台”这一新的命题 .文中通过分析现场总线控制系统的成因和体系结构特点 ,论证了该命题的正确性与可行性 ,并探讨了面对现场总线百家争鸣的现状应采用的选型策略 .该命题的提出 ,为实时分布式 Multi-

基于multi-agent的综合系统仿真研究

本文针对复杂系统仿真特点 ,以降低综合仿真系统的复杂度和研发费用并提供最大程度的辅助决策支持为目的 ,提出了包括仿真建模结构、控制结构和智能模型的基于multi agent的复杂系统智能仿真方法 .基于multi agent的综合系统智能仿真体系结构引入了一种新的建模与仿真的思想和方法 ,从而形成了一套独特的仿真建模体系结构 ,提高了建模与仿真的通用性、可重用性 ,互操作性以及计算机仿真技术的辅助决策能力 .

Multi_MINT:一个基于MINT的多核处理器模拟器

多处理器模拟器是设计、分析和优化多核处理器体系结构的主要工具。本文提出的Multi_MINT分为前端和后端两个部分,其中前端采用MINT来模拟MIPS处理器指令,后端包括Cache、互联结构、存储器控制器等部件,从而构成了一个完整多核处理器模拟器系统。本文主要介绍了Multi_MINT的总体结构,后端主要硬件部件的模拟框架,以及模拟器设计和实现中的一些细节问题,最后通过一个实例说明了Multi_MINT在性能评测方面的作用。

基于协进化机制的Multi-agent分布式智能控制体系

提出了一种基于协进化机制的多Agent分布式智能控制体系结构,采用划分基本行为模块的方法,将复杂、分布的控制系统构造成基于行为的、行为活性状态可调控的多Agent系统,并设计了基于协进化机制的分布式并行协进化学习机构及其协进化算法,使系统能分布并行地协进化各基本行为规则库和全局行为协调规则库。该体系结构能简单而有效地使系统的局部控制及全局行为协调协作具有较好的在线学习、自适应特性,系统可扩展性强,有较好的实用性,能应用于资源受限的嵌入式控制系统。

基于Multi-Agent的动态配置软件体系结构研究

本文介绍了一种基于多代理的动态配置软件体系结构。对于采用基于构件的软件开发方法开发的软件系统,利用这种动态配置中间件能够根据配置请求在系统运行期间调整构件连接关系和完成构件升级,实现系统的动态配置,并且保证系统始终处于正常工作状态。在动态配置框架中,作为软件组成元素的每个构件被封装成具有智能性和机动性的Agent,能够自主地进行构件升级和结构调整。

基于Multi-agent的军事虚拟仓库的构建和运行研究

以Multi-agent技术以及虚拟物流理论为基础,提出了以管理Agent、资源Agent、调度Agent和任务Agent为主体的军事虚拟仓库体系结构,并应用生命周期法对军事虚拟仓库的运行机制进行了分析。

基于Multi-Agent和HLA的口岸物流仿真

针对高层体系结构(HLA)仿真建模技术的仿真联邦成员缺乏智能性和Multi-Agent仿真方法分布通信协同能力较差的问题。提出了一种集成两者的自适应中间件的方法,通过自适应中间件实现了两者集成的数据转换、通信及控制等功能,并进行实例验证。结果表明此方法在最小改变的情况下保证了集成开发的灵活性及方法的可行性、实用性和可靠性。