基于SSH的住宅小区电子商务平台方案设计

为了促进住宅小区电子商务平台建设,提出一种基于J2EE和SSH架构的解决方案,引入了JQuery、AJAX等前台开发技术,以提高开发效率和提升客户体验,同时采用基于角色的访问控制、日志器等安全技术,充分保证系统安全性。     

8～18GHz双刀双掷开关研究

采用混合集成电路的方法,用ＰＩＮ管芯制作了８～１８ＧＨｚ双刀双掷开关。开关采用管芯全并联结构。反射式ＤＰＤＴ开关插损≤２．０ｄＢ,隔离度＞５９ｄＢ,开态驻波比≤１．６５,承受功率为连续波５Ｗ。吸收式ＤＰＤＴ开关插损≤２．９ｄＢ,隔离度＞５８ｄＢ,开态与全关断态驻波比≤２．１,承受功率连续波２Ｗ。电路由ＴＴＬ信号控制。     

V5.x协议测试系统

首先概述了 V5 .x接口的功能及 V5 .x协议的结构 ,在此基础上 ,详细阐述了在 PC机上实现 V5 TS (V5 .x协议测试系统 )的测试原理及方法。最后 ,通过一个测试举例 ,描述协议消息的传输过程。     

国研宽带网络游戏进军电信市场

本文重点分析了宽带游戏市场的现状，同时比较了各种接入方式进行游戏的技术指标。作者认为宽带游戏是促进宽带接入业务的关键应用，是将来主要的业务发展方向。     

利用CVI,VC环境驱动数据库的一种简单方法

介绍了一种方法，用于在Visual C^ 6．0环境下构建驱动Access的DLL动态链接库，然后在LabWindows／CVI环境下调用此动态链接库，从而实现了测控软件的简单数据库驱动。     

Municipalities as a Driver for Wireless Broadband Access

Municipalities can form a driving force behind the deployment of new telecom infrastructure. While a telecom operator focuses on direct (financial) profits, a municipality is mainly interested in the social benefits for its inhabitants. In this paper, we evaluate a wireless municipality network from both a technical and an economic point of view. WiFi and WiMAX are considered as the most suited technologies for this purpose. A detailed techno-economic study has been performed including forecasting of the user adoption, dimensioning of the wireless network and modelling the related costs and revenues. The trade-off between installing a high number of relatively cheap WiFi access points, and a smaller number of more expensive WiMAX base stations for delivering full coverage is investigated in several scenarios.

基于EPON的FTTH技术

随着IPTV、VOD、视频会议、VoIP等新兴网络业务的兴起,目前流行的几种宽带接入技术如xDSL、Cable Modem、LMDS将逐渐难已满足人们对带宽的需求.光纤到户（FTTH）是未来发展的目标,无源光网络（PON）则是实现这一目标的一种理想技术.如何实现视频、音频和数据在互联网上的透明传输,EPON作为多业务宽带接入方式具有优异的特性,它利用成熟的以太网技术和低成本的光纤设施,维护容易,实现简单,易于扩展和升级.主要讨论了广西电信采用的EPON的FTTH方案,对采用EPON的FTTH技术进行了详细的分析.     

Novel algorithm for time division multiple access in broadband ISDN passive optical networks

For shared access to a broadband communication network using the asynchronous transfer mode (ATM) a passive optical network (PON) has previously been proposed. A novel algorithm to evaluate the time division multiple access (TDMA) protocol which controls the traffic from the various subscribers towards the shared access equipment (upstream direction) is proposed. It uses counters to estimate the moment of a data packet arrival at the subscriber side. By this ‘look-ahead’ technique no extra upstream channels are needed to initiate the polling by the subscriber. The algorithm guarantees fair access for all subscribers and minimizes the necessary overhead. Both the maximum access delay and overhead may be readily calculated, and the obtained results were supported by numerical simulation. Applicability in the standard broadband network environment has been proved by hardware design simulation.     

ATM—success or failure? Economic remarks on the introduction of broadband technology in Europe

The introduction of ATM and broadband-based equipment into the European market requires considerable capital investment. It will result in a structural technological change, affecting the competitiveness of the European economy. Successful introduction depends on how both ATM network equipment and broadband based end-user equipment are brought onto the market. This paper focuses on economic benefits and anticipating marketing strategies, applicable in Europe with its specific, historically evolved structures. The price to pay for this ‘in-sight information’ is leaving out a global comparison. Refraining from evaluation whether conditions are good or bad for Europe or other areas, the article explains what conditions can be found there recently and where are the chances and challenges right now.     

宽带综合业务数字网的ATM技术

目前宽带综合业务数字网(B—ISDN)已成为各国研究与开发的重要内容。本文简述了信息传输技术的发展趋势,着重介绍了ATM技术的概念、ATM信元结构和传输帧结构、ATM交换技术和ATM系统参考模型。