试论电信业与传媒业的融合与结构转型

本文论述了电信业和传媒业如何融合为大传媒产业,以及大媒体产业的形成对我国产业结构转型产生的多方面影响。     

Two views from the summit

This article reviews the objectives and results of the First Phase of the World Summit on the Information Society. It includes an analysis of the discourse conducted to this point at the Summit, and of the possible outcomes.     

通信网维护分析

在市场经济的发展下,人们的物质文化生活水平逐渐提高,用户对宽带网络的要求也随着市场经济的发展日益提高。随着电信行业FTTH用户数量的不断增长,10M、20M宽带的普及,百兆宽带的日益临近。越来越多的用户对网络质量和维护效率提出了更高的要求。各个电信运营商,也把故障率和中断时间作为一个重要的考核指标。因此,对通信网故障和中断率分析,是电信运营商摸家底,提高服务水平,满足客服要求的重要手段。     

Leveraging Sunken Investments in Communications Infrastructure: A Policy Perspective From the United States

Bridging the digital divide between information and technology haves and have-nots has waned from the top of the national policy agenda in the United States during a time in which the sunken investments of the 1990s need to be leveraged. A national information network now exists yet this infrastructure--largely hardware--needs to be continually modernized and parlayed with commitments to building human capacity, developing relevant content, and scaling socially beneficial technology applications, such as telemedicine, in order to optimize these initial multi-billion-dollar outlays. This article makes the case that sidestepping public-private initiatives aimed at accelerating digital opportunity is imprudent, given the mounting empirical evidence highlighting the payoffs of information and communications technologies, when properly integrated and applied, especially in enhancing the life chances of underserved Americans. Policy next steps should advance the goals of expanding universal service initiatives, including hastening broadband deployment to homes and learning institutions, and deepening programs which leverage the utility of the existing infrastructure, such as expanding human-capital development, producing relevant content, and innovating socially beneficial technology applications.     

传输综合网管系统研究

论述了建设传输综合网管的必要性,在系统分析传输综合网络管理系统的难点,提出了切合实际解决方案;综合考虑上海电信实际现状,从建设目标、系统架构等方面制定了传输综合网管的技术路线并成功部署了该系统。     

Leaving It Up to the Industry: People With Disabilities and the Telecommunications Act of 1996

This article examines whether Section 255 of the 1996 Telecommunications Act achieves accessibility for people with disabilities. Taking the interest group approach, it shows that the Federal Communications Commission (FCC) implemented Section 255 in a way that is favorable to the telecommunications industry and not to people with disabilities. The FCC's regulations only encourage the telecommunication industry to consider accessibility issues for people with disabilities. This proindustry regulatory bias is in keeping with the established pattern of policymaking in other areas concerning people with disabilities. The paper argues that if the FCC continues to rely on the voluntary efforts of the industry, people with disabilities will not enjoy benefits of access to telecommunications systems.     

A new sensor selection scheme for Bayesian learning based sparse signal recovery in WSNs

In this paper, we address the issue of sparse signal recovery in wireless sensor networks (WSNs) based on Bayesian learning. We first formulate a compressed sensing (CS)-based signal recovery problem for the detection of sparse event in WSNs. Then, from the perspective of energy saving and communication overhead reduction of the WSNs, we develop an optimal sensor selection algorithm by employing a lower-bound of the mean square error (MSE) for the MMSE estimator. To tackle the nonconvex difficulty of the optimum sensor selection problem, a convex relaxation is introduced to achieve a suboptimal solution. Both uncorrelated and correlated noises are considered and a low-complexity realization of the sensor selection algorithm is also suggested. Based on the selected subset of sensors, the sparse Bayesian learning (SBL) is utilized to reconstruct the sparse signal. Simulation results illustrate that our proposed approaches lead to a superior performance over the reference methods in comparison.     

移动流媒体业务在3G通信时代的应用

在3G的发展进程中,移动流媒体业务是其中最重要的一项。介绍了流媒体技术,分析了移动流媒体业务发展中存在的问题,提出了解决问题的办法。