下一代家庭网络G.hn实现固网和移动网络的融合

从当前家庭内的互联方式多样化、解决方案多的现实角度出发,提出基于G.hn的家庭互联新技术.该技术可以基于家庭内现有的任何管线资源来承载,同时提供更高的带宽充分满足家庭内新型业务的开展需要.详细介绍了G.hn的标准进展、功能、组网及上海贝尔阿尔卡特公司的宽带融合解决方案.     

家庭网络互联技术的发展现状

家庭网络是NGB技术工作组的关注点之一,本文梳理了当前家庭网络互联技术的发展现状、国际标准发展趋势,为NGB工作组后续工作提供参考。     

宽带电力线通信技术在电视上的应用研究

研究了电力线通信技术,特别是应用于家庭内宽带联网的基于低压电力线的宽带电力线通信技术.基于G.hn宽带电力线通信技术,提出了一种智能网络电视系统设计方案,实现智能网络电视通过电力线连接有线网络,并研究了G.hn的耦合隔离和滤波电路、控制通信协议、组网配置和加密配对.该系统经过测试和整改优化,网络吞吐量符合设计目标.     

浅析下一代家庭有线网络技术

本文简要描述了智能家居和家庭网络技术。重点分析了基于G．hn的下一代家庭有线网络的物理层和数据链路层的关键概念、系统技术及参数。     

基于G.hn的智慧家庭组网关键技术

在未来智慧家庭中,超高速的综合智能组网成为家庭组网的趋势。基于此,首先分析了G.hn协议的调制技术及频宽和目前同轴线缆的频谱使用状况,然后研究了G.hn扩频技术的关键技术,最后提出了关键技术要点及扩频方向。     

浩博科技：欲做联网家庭下一波潮流的引领者

浩博科技（CopperGate）主要服务于两大市场，家庭娱乐网络和宽带接入。该公司基于标准的半导体芯片是唯一能够在现有家庭线路（同轴电缆、电话线和电力线）上实现数字宽带内容传输的产品。     

G.hn技术在同轴接入网中的应用

目前广电网络双向改造模式是EPON+Eo C,其中Eo C产品大部分使用的标准是Home Plug AV,符合该标准的Eo C产品整个系统吞吐量在300 Mbps左右、时延在20~30 ms之间,在广电网络双改的初期能够满足网络建设和用户宽带的需求,但随着"宽带中国"战略的发布以及广电自身业务的发展,原来使用的Home Plug AV技术组网方式显现出一些局限性。G.hn技术可以解决目前同轴接入网中面临的问题,它是多种媒体介质的统一解决方案,具备高抗干扰性、高带宽、低时延等特点,在广电网络应用场景下,可替代现有的Eo C接入网系统,为终端用户提供千兆接入,同时也是OTT的同轴线缆承载解决方案。     

Lantiq眼中的宽带和无线网络

宽带接入和无线网络技术随着市场需求的快速提升而不断演进,其市场规模也在迅速扩大,这为全球相关芯片供应商提供了前所未有的增长机遇,拥有完备的技术储备和产品线规模的半导体公司无疑将在这一市场取得更多的竞争主动权,作为前身是英飞凌科技有线通信事业部的Lantiq公司对此更是充满自信,我们的年收入是50亿美金,Lantiq首席执行官Christian Wolff自豪地说,多家评估机构的市场排名显示,Lantiq在固定接入网市场和宽带DSL市场的占有率分别位居全球首位和第二位。     

采用G.hn技术改善交通工具中的互联网通信

文章探讨以G.hn技术为代表的高带宽电力线通信技术对于改善交通工具中的互联网通信的作用。尽量利用客舱内已有的电力线缆和插座,方案整体安装及施工的性价比很高。G.hn电力线通信技术特别适合于用来实现交通工具客舱内部的Wi-Fi信号覆盖和蓝牙信号覆盖。另外,采用该技术方案,能在交通工具处于联电驻停状态(新能源汽车充电以及船舶系泊于码头并连接岸电等)时,用高带宽有线接入替代4G或5G移动通信网络实现专属高带宽互联网接入,从而尽可能地减轻对运营商4G、5G网络的压力。同时,当交通工具在行驶以及联电驻停两种状态间转换时,该方案还能尽快实现两种接入方式间的切换。     

家庭网络物理层关键技术研究

介绍了ITU—TSG15涉及的物理层接入技术在家庭网络应用中的标准化进展情况及G.hn标准的形成背景,分析了G．hn中物理信道的特点,并在此基础上对物理层关键技术进行了探讨。     

IIDWBA algorithm for integrated hybrid PON with wireless technologies for next generation broadband access networks

Optical and wireless technology integration has been proposed as one of the most promising nominees for the next-generation broadband access networks for quite some time. Integration scheme merges the high-speed and high-capacity of the optical networks with the low-cost, wide-coverage and mobility features of the wireless counterparts for the Subscriber Stations (SSs). It is also financially viable for the telecommunication service providers, particularly in the rural area where the development of optical infrastructure or expansion of the existing telecommunication solutions such as Digital Subscriber Line (DSL), Cable Modem (CM) or T-1/E-1 networks are either too costly or unreachable. In order to successfully integrate the two technologies, there are some technical concerns in terms of Architectural aspects, Physical Layer features and Media Access Control (MAC) related issues, which need to be addressed efficiently in order to provide the smooth end-to-end (e2e) integration. This paper is mainly focused upon the analysis of the key topics in MAC-related issues such as E2E wavelength/bandwidth requests and allocations over the converged scenario. It proposes an Inter-channel and Intra-channel Dynamic Wavelength/Bandwidth Allocation (IIDWBA) algorithm where the hybrid Passive Optical Network (PON) acts as a back haul technology for the wireless counterpart. The proposed algorithm works in three phases, namely, Initialisation, Intra-channel bandwidth allocations and Inter-channel bandwidth allocations and is capable of allocating wavelength/bandwidth efficiently and effectively over the converged scenario. Performance of the proposed algorithm is evaluated through conducted simulation scenarios under different simulation parameters, traffic patterns and load values. According to the captured results, IIDWBA algorithm shows a better performance when it is compared to the scenario in which it has not been employed.     

BRAIN—an architecture for a broadband radio access network of the next generation

The tremendous growth rates of the Internet as well as the area of mobile communications give rise to the chance that the mobile Internet is most promising by combining both the Internet and mobile communications. These prospects are the motivation for the European research project BRAIN (Broadband Radio Access for IP‐based Networks), which is developing an open architecture for a broadband wireless mobile access network offering an integrated communication platform across heterogeneous networks and, thus, goes beyond current third generation systems and towards the mobile Internet. The project covers three major technical areas: support of seamless service provision in a mobile environment; the design of an IP‐based access network that will support non‐cellular technologies such as wireless LANs; and requirements of a broadband air interface suitable for hot spots. BRAIN is going to integrate HIPERLAN/2 with UMTS by means of an IP access network. The work is guided by a user‐centric top‐down approach ensuring that user functionality is the key driver of the project. This article will focus on that part of the BRAIN work which specifies the main interfaces of the BRAIN architecture and deals with aspects related to the support of Quality of Service and mobility. Copyright © 2001 John Wiley & Sons, Ltd.     

EPON:下一代宽带光接入网

介绍了EPON（以太网无源光网络）的体系结构，国内外的研究现状以及市场和应用，并对其前景进行了展望。     

Investigation of phantom circuit benefits for next generation xDSL systems

This paper is focused on measurements and analysis of phantom mode benefits in G.fast and next generation xDSL systems. The investigation is based on real measurements performed for a multi‐quad metallic cable together with theoretical evaluations of phantom circuit potentials. Because the presence of phantom circuits leads into increasing the summary crosstalk level in a metallic cable, the application of a phantom mode is questionable in practice. That is why the investigation was performed, and conclusions provided in this paper can be helpful to decide potential benefits of this method for future applications. The elimination of a crosstalk can be performed by using advanced modulation techniques such as vectored discrete multi‐tone modulation (VDMT); however, its application in practice is limited because of its complexity and computational demands. That is why several scenarios are currently being discussed with either no VDMT application or with only partial crosstalk compensation. Because of that, this paper is focused on comparing the results for a first scenario without using any far‐end crosstalk (FEXT) elimination technique, whereas a second scenario is based on partial FEXT suppression by VDMT application, to decide the effectiveness of using phantom modes in practice. Copyright © 2014 John Wiley & Sons, Ltd.     

基于G.hn标准协议的PLC混合ARQ方案研究与改进

现代电力线通信(PLC)系统为了可靠地传输数据并提高系统传输量,自动重传请求(ARQ)技术必不可少.然而ARQ技术已经很好地解决了现有通信的数据传输问题,但由于PLC信道不稳定、强干扰以及衰减非常快等缺点造成误码率极高、吞吐量低.针对PLC家庭网络提出能够适应PLC信道的H-ARQ技术来满足未来PLC通信网络的需求.改进ARQ和低密度奇偶校验(LDPC)技术相结合来提高传输率、降低误码率.最后通过仿真实验对改进的H-ARQ协议算法验证,从仿真结果可以看出误码率降低、吞吐量较高,能适应环境极其差的电力线通信.     

下一代光网络的发展和关键技术

近年来，随着经济的发展和计算机的普及，Internet业务出现了爆炸性的增长，现有的网络应付大量的数据业务和各种类型的服务业务已显得有些力不从心。为了适应未来发展的需求，并针对IP业务的主导地位和光传输技术的发展，下一步不仅要提高传输链路的带宽和利用率，还要提高光网络的智能性，以满足IP业务对传输和交换系统的要求。因此我们提出发展以IP层和光层融合的下一代智能光网络（OTN）。并针对下一代光网络的发展和关键技术进行了简单的阐述。     

下一代多波长光接入网关键技术分析

介绍了WDM-PON系统的基本结构以及运行原理,重点分析和探讨了其中涉及到的关键技术,主要包括多波长光源、波分复用器、ONU光源、接收机等光器件方面的问题.此外,还对光网络的保护和恢复以及如何承载广播业务等关键问题进行了深入探讨.最后,分析了WDM-PON未来的研究方向,并提出了应用前景.