B－ISDN与现有网络互连的研究

本文主要围绕Ｂ－ＩＳＤＮ与现有各种网络（如ＰＳＰＤＮ、ＰＳＴＮ、ＬＡＮ等）的互连问题展开讨论，并针对不同的应用场合提出了相应的互连解决方案。     

An IMS-based network architecture for WiMAX-UMTS and WiMAX-WLAN interworking

The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGNs), since the interworking environment and the service flexibility that this technology offers to the currently deployed wireless broadband technologies makes it appealing to users, service developers and network operators. In this paper we propose a heterogeneous network model based on the IMS that integrates the Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and Wireless Local Area Network (WLAN) technologies and provides guaranteed QoS. We present the complete signalling flow concerning the authorization, registration, session set up and vertical handoff processes, as well as, an analytic model for cost analysis of the proposed architecture.     

智能网与因特网互联的PINT业务协议研究与实现

本文在分析了PINT业协议以及SIP／SDP协议的基础上,结合点击拨号业务给出了PINT业务协议的有限状态机,并利用面向对象的方法实现了协议的主要功能。     

基于ATM和Internet的视频点播系统的设计与实现

本文探讨了基于ATM和Internet传输视频点播业务系统的基本原理和实验实现。该系统由业务代理器和交互工作单元组成,业务代理器控制系统内的资源分配及业务指南,交互工作单元在代理器的控制下实现各种功能转换,包括：数据传输协议转换、比特率控制、业务网关转换、业务量监测。     

Vertical handoff in integrated CDMA and WLAN systems

Future wireless networks are expected to consist of different types of wireless networks such as code division multiple access (CDMA) networks and public wireless local area networks (WLANs). The integrated network will require vertical handoffs between different networks. In this letter, we propose vertical hard- and soft-handoff algorithms and evaluate their performance in commercial wireless networks.     

OSI standards: application to data communication and telematic services and Italian strategy for their introduction

The demand for data communication services as well as the development of new telematic services in the TLC environment will find their benefit from the application of the OSI standards.

These standards have reached a sound degree of definition in the last years due both to continuous improvements in the standardization activity and to increasing realizations from various manufacturers.

There is no doubt that the effective application of the OSI standards represents the challenge of the next years, which will conditionate the whole development of distributed data processing and telematic applications.

The paper presents the strategy followed in Italy for the adoption of the OSI standards, which is based on a step by step approach, where each standard is introduced on the basis of its complete definition. Initial consideration is given to the application of the MHS Standards (X400).

After a general discussion on the OSI Standards application, the paper further details on the provision of the OSI Network Service (OSI-NS) by different public data networks and on the use of such service for interworking among networks of different type. Furtheron, cases of interworking scenarios with networks not providing the OSI-NS are also examined.

Finally the paper details on the activity being pursued in Europe for the harmonization of the OSI standards and their certification.     

对我国互联网互联互通问题的探讨

介绍了我国互联网网间互联的概况,从结算、技术、监管等几个角度分析了我国互联网互联互通中存在的问题,并对问题的解决进行了探讨和建议。     

帧中继承载业务的ATM传输技术

在帧中继网络协议模型的基础上,对继帧中继承载业务的ＡＴＭ传输中关网络互通,虚连接复用,参数映射等技术问题进行了讨论,并对帧中继业务与ＡＴＭ宽带业务互通问题进行了简要介绍。     

智能网网间互联的计费模型研究

简要介绍了智能网ＣＳ－２中引入的网间互联功能的概念及其目的,并介绍了计费模型的概念以及我国智能网目前的计费模型,提出了引入网间互联动功能后智能网的计费模型,结合此计费模型讨论了网间被叫集中付费业务的计费方式。     

IP电话的标准问题

IP电话要提供与传统电话相同的电信级质量的电话服务需要进一步发展IP电话标准、IP电话设备及IP电话网设计方法。为此文章对IP电话的标准及IP电话设备的互连互通问题进行了详细介绍。