NGN业务模型变化和电信变革

NGN(下一代网络)采用集中控制的统一的承载网提供综合业务,解决了QoS(服务质量)、安全性和可管理问题,但这种集中管理模式部分削弱和丧失了互联网无所不在的性能,不能有效地支持以P2P为代表的互联网新应用和机-机业务.此外,NGN按服务质量和使用量收费的业务模型,不适应目前消费类宽带业务的发展,以宽带接入包月为代表的互联网运营模式强烈冲击传统电信业务模式,动摇了NGN业务模型的基础.NGN需要并行发展具有分布管理能力的下一代互联网,利用互联网作为基层承载网,在其上应用层建立重叠网支持P2P应用和提供分布式管理,面向广大消费者提供固定和移动宽带互联网业务,支持机-机的各种应用,充分发挥互联网无所不在的优势.     

P2P对FTTH的影响

文章对点对点( Peer-to-Peer,P2P)技术和光纤到户(FTTH)的概念进行了简单描述.重点对P2P的应用、P2P应用的带宽需求、P2P在IP网络电视(IPTV)中的应用特点进行了分析.最后得出了这样一个结论,P2P的应用不可阻挡,FTTH的普及也是不可阻挡的.     

智能宽带接入网的解决方案

随着新业务的蜂拥出现和用户对服务质量的新需求,宽带接入网必将具有更多的智能.DSLAM作为宽带业务接入的主要技术,正向智能DSLAM方向发展,以满足用户和网络的新需求.另外由于市场竞争激烈,高性价比是产品成功的另一关键因素.本文先简要阐述宽带接入网发展的智能需求,然后在介绍杰尔系统(Agere Systems)最新发布的线卡业务处理器(LTP)-APP350网络处理器特点的基础上,给出了满足新需求的高性价比智能DSLAM解决方案.     

基于VDSL及以太网宽带接入的研究

互联网技术不断发展的今天,上网速度的提高以及成为了大多数宽带用户的需求.VDSL和以太网宽带接入技术的相结合,满足了用户对高速宽带接入方式的需求.首先,本文描写了VDSL的特征.其次,简单的对以太网宽带接入做出介绍.最后,提出了基于VDSL及以太网宽带接入的具体研究.     

HSPA 移动宽带商用模式及网络性能分析

1 移动宽带的竞争优势 互联网革命激起了全球范围内对宽带接入的巨大需求,促使宽带成为当前发展最为迅速的电信服务之一.而随着越来越多的用户开始寻求移动性和通用可用性,人们对宽带接入的需求将继续增长.HSPA(高速数据分组)可通过利用现有3G设备升级到爱立信的端到端移动宽带产品,引入广泛有竞争力的宽带互联网接入服务,以满足这一快速增长的需求.     

宽带接入网的发展趋势与FTTH

通过分析中国电信宽带接入网的现状,并结合宽带业务需求的变化,研究宽带接入技术和宽带接入网的发展趋势,明确了光纤到用户(FTTH)将是宽带接入网发展的方向。     

陕西天思信息科技有限公司TS1800多介质融合宽带接入家庭组网产品方案介绍

TS1800多介质融合宽带接入家庭组网产品方案满足我国现有主要运营商的多种宽带接入家庭模式的业务需求,支持多模方式宽带接入,可选择光纤(ONU)、同轴、LAN和3G 4种接入模块。其终端侧     

ATM光纤化多媒体平台的建设

随着经济的发展 ,信息浪潮风起云涌 ,全球范围内对通信基础设施的需求空前高涨。新数据业务、商务用户、住宅用户、互联网应用及电信市场的开放使业务经营者感到压力重重。光传输技术的成熟和宽带接入技术的完善 ,激发了电信运营业和电信制造业对宽带接入建设倾注大量的技术和资金。可以预计 ,宽带接入必将形成一个极为可观的市场。1　宽带接入技术以互联网业务为主的宽带业务可分为局域网和广域网两种。短短的 2 0多年 ,数据交换技术已从固定带宽分配的ＤＤＮ(ＴＤＭ)、Ｘ .2 5(ＤＰＮ)发展到帧中继 (ＦＲ)及异步转移模式 (ＡＴＭ )。目前…     

基于GPON技术的局域网宽带接入设计

比较了几种常见的有线接入方式,阐述了GPON的优势.针对局域网宽带接入需求,设计了一个基于GPON技术的宽带接入方案,并详细阐述了设计过程.实现了局域网用户的宽带接入.     

宽带接入是全业务逗营的关键

文章首先论述了宽带接入对于固定和移动运营商全业务运营的重要意义,然后分别对固定宽带接入(深度光纤接入)和移动宽带接入(HSPA/EV-DO、LTE)技术进行了分析,对实现全业务的网络总体架构进行了探讨,最后总结了实施宽带战略的具体措施.     

基于TD-LTE移动宽带技术解决农村区域无线宽带接入的应用

为在4G发展窗口期,有效解决农村区域4G覆盖范围内无线宽带的接入问题.采用TD-LTE (4G)移动宽带技术共模或Refarming模式利用现有频谱资源方式、同期配合辅助使用4×4 MIMO提升网络容量、差异化保障混合业务、M-CDN方案减少用户时延等方法解决农村区域宽带接入需求,保证网络的整体客户感知,合理利用资源,保证窗口期农村区域投资收益最大化.     

How variation in internet access,digital skills,and media use are related to rural student outcomes: GPA,SAT, and educational aspirations

Some have pointed to divides in the availability of fixed home broadband Internet access as a contributor to rural students’ lower levels of educational attainment. Based on standardized exams (SAT Suite) and a survey of rural Michigan students in grades 8–11, we find that rural students with broadband home Internet access are more interested in school and leave homework incomplete less often. However, the relationship to classroom grades (GPA) is relatively trivial. Yet, we find that students who are not dependent on a cell phone for Internet access and those with higher digital skills, especially social media skills, rank considerably higher on the SAT. Rural students with broadband Internet access are able to participate in a more diverse array of online media activities, which supports building digital skills. Any negative relationship between time spent on social media, video games, other digital media and educational outcomes is outweighed by the benefit to digital skills. However, aspects of rural culture; including the emphasis on activities such as sports, as a path to postsecondary schooling and upward, social mobility; may be stunting the positive relationship between access, digital skills, and educational aspirations. Whereas extra-curricular sports have no direct relationship to SAT performance, students who spend more time on sports receive higher grades and have higher educational aspirations than those with more digital skills. We discuss the implications for rural students’ access to human capital and how the unequal relationship between digital skills and performance in the classroom and on the SAT may perpetuate inequalities.     

Hybrid wireless-broadband over power lines: a promising broadband solution in rural areas

In rural areas, due to the low population density and the poor familiarization with new technologies, new projects related to broadband access are less profitable. In this article a hybrid wirelessbroadband over power lines network, suitable for rural and remote areas is presented, offering smart grid applications and broadband access along a 107 km medium voltage power grid in Larissa, a rural area in central Greece. This hybrid solution exploits the ubiquitous presence of the power grid along with the adaptability and accessibility of wireless technology. Through the design and implementation of this hybrid network many aspects of BPL technology were successfully dealt with demonstrating that, in addition to enhancing the power grid performance, W-BPL technology may be considered as an alternative broadband solution in rural and/or sparsely populated areas.     

Access to broadband Internet and labour force outcomes: A case study of the Western Downs Region,Queensland

This paper examines the causal effect of household access to broadband Internet on individuals’ labour market outcomes in an Australian rural and regional context. This study uses the survey data of 391 households randomly selected from the Western Downs Region of Queensland, Australia, and employs the propensity score matching technique to make causal inferences. This study also controls selection bias issues – an aspect which has been overlooked in previous studies. This study found that the causal effect of household access to broadband Internet on individuals’ labour force outcomes is not statistically significant. This finding can add value to our knowledge of the causal relationship between broadband access and labour force participation. As the rollout of a high-speed broadband network in rural and regional Australia is currently underway, the finding can be considered a benchmark for subsequent assessment of the effects of such infrastructure development on socio-economic outcomes.     

WiFiRe: rural area broadband access using the WiFi PHY and a multisector TDD MAC

The needs of Indian rural telecom, and the economics of currently available broadband access technologies, motivate a new system for rural broadband access, which we call WiFiRe (WiFi rural extension). The system leverages the widely available, and highly cost-reduced, WiFi chipsets. We, however, retain only the PHY from these chipsets and propose a single-channel, multisector, TDD MAC using directional antennas. The proposed WiFiRe MAC is similar to the WiMAX MAC in several respects. In this article we motivate our approach, describe the system architecture and the MAC, analyse the spatial reuse, and then, using a simple scheduler, provide an assessment of the voice and data capacity of a WiFiRe system     

Demand for broadband access in Greece

As broadband access networks are relatively new in Greece, it is really difficult and involves great risk to determine the potential market for broadband services. The intent of this paper is to add to the discussion of delivering fixed broadband lines to customers in Greece taking into account regulation issues, the strategic movements of the market key players and the commonly admitted inequality of broadband access availability between urban and rural areas. In addition, using time-series analysis and examining the correlations between the number of fixed broadband lines and specific demographic factors for the past three years (mid 2006–mid 2009), an attempt to estimate empirically the forthcoming demand for broadband lines is conducted. Population’s income and effective competition are recognized as the strongest determinants of broadband development. In addition, it yields that demand for broadband will continue to have a positive trend for the years to come as people are becoming more and more familiar with new technologies, with youth being the pioneer to the use of innovative services that require broadband access.     

Crossing the digital divide: cost-effective broadband wireless access for rural and remote areas

The use of wireless, DSL, and cable for broadband access has become increasingly prevalent in metropolitan areas. While these technologies are being successfully utilized in terms of both service quality and economics in densely populated areas, there are still vast geographic regions where broadband services are either prohibitively expensive or simply unavailable at any price. The article examines several alternatives for using 2.4 GHz 802.11b (WiFi) technology to provide fixed broadband access in rural areas consisting of towns, smaller remote communities, clusters of subscribers separated by large intercluster distances, as well as widely scattered users. Our approach is to model a network based on realistic demographics, equipment and operations costs, service revenues, and customer demand and usage, and calculate the lifecycle economics in terms of capital investment and profitability. We consider the cost benefits of several emerging technologies and architectures, including high gain antennas, dynamically steerable beamforming antennas, and multihop routing. Our results show that cost-effective affordable high-speed wireless Internet access can be provided in rural and remote areas using nontraditional and innovative approaches, bridging the so-called digital divide.     

广东省宽带通信网建设及其发展的考虑

本文介绍了广东省宽带通信网的建设方案和设想，提出应根据ＡＴＭ交换技术的发展状况逐步发展ＡＴＭ交换网。在接入网方面，ＡＤＳＬ因具有较好的性能价格比且可以利用现有电视用户配线，成为目前较为理想的接入网产品；ＨＦＣ网络则不失为在农村地区的一种经济、灵活的发展模式。ＩＴＶ业务与宽带数据通信是目前宽带通信网的主要应用，它们的发展趋势是走向融合。     

Quality of service support in IEEE 802.16 networks

During the last few years, users ail over the world have become more and more accustomed to the availability of broadband access. This has boosted the use of a wide variety both of established and recent multimedia applications. However, there are cases where it is too expensive for network providers to serve a community of users. This is typically the case in rural and suburban areas, where there is slow deployment (or no deployment at all) of traditional wired technologies for broadband access (e.g., cable modems, xDSL). In those cases, the most promising opportunity rests with broadband wireless access technologies, such as the IEEE 802.16, also known as WiMAX. One of the features of the MAC layer of 802.16 is that it is designed to differentiate service among traffic categories with different multimedia requirements. This article focuses on mechanisms that are available in an 802.16 system to support quality of service (QoS) and whose effectiveness is evaluated through simulation.     

基于GSM-Hi技术的农村无线宽带建设方案及部署策略

当前宽带建设的重点集中在城市地区,而农村地区目前2G和3G仍作为农村无线数据业务的主要承载网络,宽带设施发展水平提升并不显著,不能适应农村互联网快速发展的需要.因此,如何实现农村宽带接入建设,解决农村区域上网难的问题显得尤为重要,GSM-Hi技术应运而生.