主动网络技术下分布应用的性能优化

本文独立地提出了基于插件技术的主动网络的体系结构,通过插件技术使业务的引入以及业务功能的扩展更加快速、灵活.在此基础上建立了一种新的网上定票业务模型.仿真表明,主动网络在网络中加入计算的能力可以大大优化网络的性能,网络在对用户的平均响应时间、服务器负载等方面都明显有所改善.     

SONPMSA系统通信平台关键技术的研究

面向业务的网络性能管理系统是以网络中运行的业务为被管理对象的,而传统网络中间节点的封闭性限制了系统的实现。SONPMSA系统通信平台的设计与实现是通过引入主动代码技术、定义基于应用层实现的主动信包的格式、利用Java的平台无关性解决了主动代码分发机制中关键主动代码的解析和加载两大功能的设计与实现问题。从而解决了面向业务的网络性能管理系统通信平台动态地执行网络业务数据的管理问题。     

主动网络技术在MPLS-VPN中的应用研究

利用主动网络的可编程性,文中提出一种将主动网络技术运用于MPLS-VPN网络中的方案,通过将网络管理程序动态部署到各主动节点上,实现了网络的智能化、分布式管理。同时,可根据用户的需求,调用主动节点中相关的主动代码,动态配置业务执行环境,满足用户对QoS的要求。     

基于业务监控的IP网络主动保护解决方案

文章首先描述了目前IP网络在承载语音、视频业务时的缺陷,然后提出解决IP网络现有问题的思路,并详细描述了实现IP网主动保护的具体解决措施.主要是通过网络监测中心收集相关网络指标,一旦发现IP网络设备端口或链路质量指标的劣化超过了语音业务容忍的门限,便主动向IP网络设备下发相关指令,主动实现不满足语音、视频业务质量需求的链路的快速切换.     

主动网技术

主动网络(Active Network)是近几年来国际网络研究的前沿课题,是一项基于因特网的新型网络技术。主动网络对不同的数据运行不同的程序,实现客户化的定制服务,同时可以快速地向网络中引入新业务。文章对主动网的产生、基本概念及工作原理进行了详细的介绍。     

数据仓库和OLAP技术在CRM投诉分析中的应用研究

借助商业智能解决方案技术,充分利用各种网络业务运行信息,通过科学的主动监控技术发现网络业务运行中的潜在问题,实现有效的主动监控预警分析,及时的做出预先警告,并进一步推进集中监控的精细化,提高网络业务运行的安全性、稳定性。重点要以客户投诉数据建立数据仓库,针对不同的分析主体设计建立各自的多维数据集,利用联机分析技术进行多维度分析,得出客观的,值得运营商借鉴的实时动态结果,为电信运营商设备的主动监管提供有力的技术支持,为广大的网络用户提供更优质的服务。     

基于主动代码的面向业务的网络故障管理研究

文章针对传统的网络故障管理的不足,研究了基于主动代码的面向业务的网络故障管理.采用主动网络技术、面向业务概念和CORBA IDL,这使得网络故障的管理不仅具有分布式的特点,而且具备主动式的定制功能,满足了面向业务的网络故障管理要求.     

基于主动包技术的网络性能优化研究

随着网络技术的不断发展，新应用和新技术层出不穷，促进了网络新业务的出现。同时对网络性能的改善不断提出新的要求。主动包技术改善了传统网络的“端到端”模型，提高了网络的灵活性和可扩展性。通过仿真比较研究了主动包技术的网络性能优化，并与传统网络进行性能比较，具有现实意义。     

PNAT——面向移动互联网的双重翻译过渡技术

基于中国移动提出的双重翻译过渡技术——PNAT,对解析层面的3种双重翻译技术:BIH、464xlat、4rd的特点以及各技术间的共存互补关系进行了深入探讨.双重翻译技术能使得现阶段网络中基于IPv4的用户和应用无需修改就能运行在IPv6网络里,从而提高内容提供商、业务提供商对IPv6的支持力度;双重翻译技术能使得业务流量被主动引导到IPv6网中,从而促进网络运营设施在短时间过渡到IPv6.     

一种基于Plugin技术的网络测量平台

提出了基于Plugin技术的可扩展的网络测量平台,和现有的测量平台相比,该平台具有即插即用性、可扩展性和独立性。给出了该测量平台的体系结构和关键组件的系统设计及Petri网模型,以及网络延迟测量插件和基于Netfilter的被动测量插件实例。     

PROMS: a PRO‐active Monitoring System for SS7 networks

In this paper, we propose a PRO‐active Monitoring System (PROMS) for SS7 networks, which actively monitors all signaling network management messages of SS7 networks, alerts operators when there is a potential network error, and provides intelligent diagnosis based on fuzzy logic and neural networks. Copyright © 2000 John Wiley & Sons, Ltd.     

主动路由器结构研究

随着因特网的飞速发展。网络应用日新月异。然而，这些新的应用中有相当一部分是为了少量的应用或者少数人的需求而提出来的，仅依靠对现有网络的体系结构进行局部的修补已经不能够很好地解决这些问题，这就要求下一代网络的体系结构必须能够在尽量少地改变现有网络基础设施的条件下．满足不同重要程度的各种需求。本文在介绍了主动网络的产生背景、概念和体系结构之后，提出了主动网络在边缘的观念．并给出了一种可扩展的主动路由器硬件结构。     

Coaxial-cable equaliser employing active distributed RC networks

We propose a coaxial-cable equalising structure based on the use of active networks containing RC distributed lines. A numerical example proves the validity of the approach.     

N-Type Doping to an Active-Short Cavity DBR Laser to Expand Its Continuous Tuning Range

We propose the use of a short-cavity distributed Bragg reflector (DBR) laser with a modified active DBR structure, which has an n-type-doped active single quantum well, and that achieves fast wavelength switching that is potentially applicable for optical packet switching networks. The laser exhibits 6.4-nm continuous tuning by moderating a steep gain change at a low DBR injection current. Furthermore, 32-nm continuous tuning has also been achieved for an integrated laser with an eight-channel array.     

Energy and delay aware routing algorithm for fiber-wireless networks

Access networks consume significant portion of the overall energy consumed by internet. The power consumption growth rate of internet is higher than any other consumer of energy. With the introduction of more and more bandwidth hungry applications, there is a huge pressure to reduce network energy consumption while still growing network capacity and functionality. We propose an energy and delay aware routing algorithm for fiber-wireless (FiWi) networks (EDAR) which not only reduce the energy consumption of the FiWi networks and but also does not degrade the overall delay of the network. We introduce dynamic thresholds for switching nodes into sleep and active mode. Our analyses show a significant reduction in the energy consumption of the FiWi networks while keeping the performance of the network up to an acceptable limit.     

Synthesis of active circuits by combining UGCs

In this paper we propose a novel idea for the synthesis of active circuits. We deal with the use of unity gain cells (voltage followers, voltage inverters, current followers, current inverters) for the design of simulated grounded inductors, multifunction filters and oscillators. The starting point of the proposed idea is the operation on the signal-flow graphs for such synthesis. We show that, thanks to the proposed technique, a wide number of active networks can be synthesised where all used passive components are grounded.     

Multistage WDM access architecture employing cascaded AWGs

Here we propose passive/active arrayed waveguide gratings (AWGs) with enhanced performance for system applications mainly in novel access architectures employing cascaded AWG technology. Two technologies were considered to achieve space wavelength switching in these networks. Firstly, a passive AWG with semiconductor optical amplifiers array, and secondly, an active AWG. Active AWG is an AWG with an array of phase modulators on its arrayed-waveguides section, where a programmable linear phase-profile or a phase hologram is applied across the arrayed-waveguide section. This results in a wavelength shift at the output section of the AWG. These architectures can address up to 6912 customers employing only 24 wavelengths, coarsely separated by 1.6 nm. Simulation results obtained here demonstrate that cascaded AWGs access architectures have a great potential in future local area networks. Furthermore, they indicate for the first time that active AWGs architectures are more efficient in routing signals to the destination optical network units than passive AWG architectures.     

A Distributed Secure Data Collection Scheme via Chaotic Compressed Sensing in Wireless Sensor Networks

Motivated by chaos technology and compressed sensing, we propose a distributed secure data collection scheme via chaotic compressed sensing in wireless sensor networks. The chaotic compressed sensing is applied to the encrypted compression of sensory data for sensor node and the data acquisition for whole sensory in wireless sensor networks. The proposed scheme is suitable for long-term and large scale wireless sensor networks with energy efficiency, network lifetime and security. A sensing matrix generation algorithm and active node matrix algorithm based on chaos sequence are proposed to ensure the secure and efficient transmission of sensor packets. The secret key crack, forgery, hijack jamming and replay attacks on the proposed algorithm are evaluated to show the robustness of this scheme. Simulations and real data examples are also given to show that the proposed scheme can ensure the secure data acquisition in wireless sensor networks efficiently.     

Effect of dormant registration on performance of mobility management based on IP paging in wireless data networks

Unlike traditional cellular networks, which provide mainly voice services, there is, at present, no method that enables the effective management of terminal mobility for both active and idle mobile terminals in data networks. Although IP paging has been introduced to reduce power consumption of dormant mobile terminals, there is no concern to design an effective IP paging method for real wireless environments. Therefore, we propose a new dormant registration based IP paging method and analyze the effect of the dormant registration threshold used in IP paging on the performance of mobility management. Moreover, we demonstrate the importance of selecting an appropriate value for the dormant registration threshold.