An Adaptive Trust Model of Web Services

This paper proposes a dynamic Web service trust(WS Trust ) model, and some corresponding trust metric evaluation algorithms. The main goal is to evaluate the trustworthiness and predict the future behaviors of entities in order to help users find trustworthy Web service providers and prevent users from providing unfair ratings against service providers.     

A Network-Based VPN Architecture Using Virtual Routing

A network based Virtual Private Network (VPN) architecture by using fundamental routing mechanism is proposed. This network is a virtual overlay network based on the relay of IP-in-IP tunneling of virtual routing modules. The packet format employs the encapsulation of IPSec ESP (Encapsulating Security Payload), an impact path code and an extended DS (Differentiated Services) code to support multi-path routing and QoS. Comparing with other models of VPN, this network system can be deployed in the current network with little investment, and it is easy to implement. The simulation result shows its performance is better than the traditional VPN system of black box mode.     

Multi-Path Routing and Resource Allocation in Active Network

An algorithm of traffic distribution called active multl-path routing (AMR) in active network is proposed. AMR adopts multi path routing and applies nonlinear optimize approximate method to distribute network traffic among muhiple paths. It is combined to bandwidtb resource allocation and the congestion restraint mechanism to avoid congestion happening and worsen. So network performance can be improved greatly. The frame of AMR includes adaptive traffic allocation model, the conception of supply bandwidth and its‘ allocation model, the principle of congcstion restraint and its‘ model, and the implement of AMR based on multi-agents system in active network. Through simulations. AMR has distinct effects on network performance. The results show AMR is a valid traffic regulation algorithm.     

Dynamic Routing and Wavelength Assignment for Multi-Lightpath Demands

In wavelength division muhiplcxing (WDM) networks without wavelength conversion functionality, we convert the dynamic routing and wavelength assignment problem for multi-lightpath demands to the cdge-disjoint paths problem, and propose a new algorithm. The computer simulations show that the proposed algorithm has better blocking probability performance them a sequential algorithm, which first separates a multi-lightpath demand into mutilple single-lightpath demands, then uses the fixed alternate routing first fit wavelength assignment (AP- FF) algorithm for each single-light path demand.     

A Routing Algorithm in WDM Mesh Metworks with Grooming Capacities

Most of the work in traffic grooming has been in the area of providing efficient network designs in Wavelength division multiplexing （WDM）. The objective of these traffic grooming algorithms is to reduce the cost of overall networks. In this paper, a routing algorithm based on transiently chaotic neural network is proposed to solve the problem in WDM logical topology. The objectives of the routing algorithm are ac commodating all traffic requirements and using less network resource. The simulation shows that the proposed algorithm is efficient in the routing selection, meanwhile the algorithm can use less network resource.     

OBS节点的偏射路由性能分析

研究了光突发交换（Optical Burst Switching，OBS）网络中的一种竞争解决策略——偏射路由，并且提出了有波长变换和无波长变换的单个OBS节点的突发丢失分析的近似模型和精确模型。     

论诚信

诚信是中华民族的传统美德，对诚信的理解以往是感性多于理性，所以要把握诚信并实现诚信，应从诚信的本质、诚信的特性、诚信的意义等方面入手。     

IP路由表生成方案研究

本文首先讨论了生成IP路由表的各种方案，然后结合一个实例对各种方案的性能进行对比分析，最后提出了一种时间耗费更少的动态路由表生成方案。     

蚂蚁算法在MPLS VPN QoS路由中的应用

介绍了一种基于蚂蚁算法的多限制QoS路由选择算法，以及其在基于多协议标签交换MPLS的虚拟专用网的应用．     

多出口校园网中E-mail服务的问题分析及解决

在高校校园网建设进程不断加快的背景下，网络的规模和技术特点都发生了很大变化．许多高校除原有的CERNET出口外，又增加了ChinaNet等其他出口，形成了多路由访问互联网的局面，一部分校园网启用了不对称路由．这一方面大大提高了网络的访问速度，另一方面也带来了一些问题，尤其是电子邮件服务由此引发的问题．笔结合在网络规划、设计和实施中的亲身实践，对其进行了分析研究，并给出了解决方案．