Architectures for broadband residential IP services over CATVnetworks

The current state of the art in digital broadband access technologies to support emerging telecommunications services makes imminent the introduction of interactive broadband services-including data, video and the Internet-into the residential market. Over the last few years, much attention has been paid to the development of media access control protocols for cable TV networks that will allow the immediate support of broadband data services as the first step toward enhanced communications services for residential users. We review some of the architectural options that must be carefully considered in order to deliver Internet protocol (IP) services to such users in an efficient yet flexible manner. Future residential cable data services are expected to deliver Internet access, work-at-home applications, small business access, local area network LAN-LAN interconnect, and LAN emulation services over cable (CATV) networks     

小区住宅接入宽带网布线设计方案

针对黑龙江省典型的住宅楼 ,提出了分布式和集中式两套布线方案 ,并比较分析了两种布线方式的组网方案、工程成本以及各自的优缺点。     

Optical broadband access using ATM on a passive optical network

Within the framework of the ‘FITL (fibre in the loop) evolution’, Siemens is developing a prototype based on a passive optical network (PON) for the economic provision of BISDN services in the subscriber access area. It provides 32 subscribers with BISDN access up to a maximum user data rate of 45 Mbit/s per subscriber. The information is transferred via ATM cells and PON-specific overhead in both directions on the PON at a data rate of 155.52 Mbit/s. For transmission to the subscribers, the time division multiplex procedure (TDM) is used. For transmission in the opposite direction, a highly flexible time division multiple access procedure (TDMA) controls the access to PON for the subscriber-side line terminations. In order to keep the transmission system inexpensive emphasis is placed on a digital calibration of the fibre loop delay, a burst transmitter at the subscriber side without amplitude recovery and a burst receiver at the exchange side with purely digital bit synchronization. However, to achieve these features a small part of data rate must be used as a PON specific overhead.     

Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network

It is anticipated that more than 75 Mb/s per subscriber is required for the convergence service such as triple-play service (TPS). Among several types of high-speed access network technologies, wavelength-division-multiplexing passive optical network (WDM-PON) is the most favorable for the required bandwidth in the near future. Furthermore, WDM technologies, such as athermal arrayed-waveguide grating (AWG) and low-cost light source, have matured enough to be applied in the access network. In this paper, the authors propose and implement a WDM-PON system as a platform for TPS. The system employs an amplified spontaneous emission (ASE)-injected Fabry-Pe/spl acute/rot laser diode scheme. It has 32 channels of 125 Mb/s and adopts Ethernet as Layer 2. Multicast and virtual local area network features are used for the integration of services such as Internet protocol high-definition broadcast, voice-over Internet protocol, video on demand, and video telephone. The services were demonstrated using the WDM-PON system.     

Converged delivery of WiMAX and wireline services over an extended reach passive optical access network

In this paper we present long-reach fiber access links supporting transmission of Worldwide Interoperability for Microwave Access (WiMAX) compliant signals. We present bi-directional full-duplex transmission of 256-state quadrature amplitude modulation (256-QAM) modulated WiMAX-compliant signals on a 2.4-GHz RF carrier over an 80-km long-reach access link at 100 Mb/s (down) and 64 Mb/s (up). Transmission of 64-QAM and 256-QAM-modulated signals on a 5.8-GHz RF carrier over a 118.8-km access link converged with four baseband differential quadrature phase shift keying (DQPSK) modulated wireline channels, along with ultra-wide band (UWB) and phase shift keying (PSK) radio-over-fiber (RoF) wireless signals over a deployed optical fiber link is also presented.     

基于ATM的宽带无源光接入网的研究

以ＡＴＭ为基础的无源光网络（ＡＴＭ－ＰＯＮ）是未来实现宽带、多业务综合接入的重要技术手段。本文分析了ＡＴＭ－ＰＯＮ（ＡＰＯＮ）系统的基本结构和各个组成部分、所支持的业务、实现系统所需要解决关键技术及实现方法，同时对系统设计是所需考虑的一些重要问题进行了探讨。     

Optical services over the intelligent optical network

Optical networks are growing at unprecedented rates to accommodate the explosion in data traffic brought on by new Internet and enterprise applications. Coupled with this growth has been the introduction of client devices (e.g., routers, storage devices, and content servers) at the network edge operating at optical line rates. These two trends are changing the fundamental way in which optical transport networks are being architectured, deployed, and managed. Emerging intelligent optical networks address the traffic scaling challenge. Additionally, when combined with modern service management technologies, these networks open exciting opportunities for delivering new customized optical services directly to end-users, allowing carriers to fully exploit the economics of optical transport. This article presents a network framework for delivering optical services     

A vision for residential broadband services: ATM-to-the-home

The arrival of asynchronous transfer mode (ATM) networks has enabled a wide range of new interactive multimedia applications for the residential market. The article presents a vision for supporting universal residential broadband services based on an ATM-to-the-home (ATTH) network architecture. This network architecture applies to the various residential access network (RAN) architectures being deployed today, such as hybrid fiber/coax (HFC), fiber-to-the-curb (FTTC), fiber-to-the-home (FTTH), and asymmetric digital subscriber loop (ADSL) technologies. The article addresses today's residential networks and applications, to understand why a switched broadband residential network is required to support residential broadband services. After exploring residential broadband application requirements, a new class of service is proposed to support a very important class of residential broadband applications that has been not addressed. Then, the technical and strategic motivations for using the ATTH architecture are discussed in detail. A universal model for residential broadband network architecture based on ATTH is described, which is shown to apply to various RAN architectures. Finally, it discusses the signaling requirements of residential broadband services and explain why the ATM multiconnection per-call model is much more efficient than the digital stored media command and control (DSM-CC) session control protocol approach for the ATTH architecture     

Economics of residential broadband access network technologies andstrategies

This article presents a techno-economic assessment of the evolution of the access network segment toward broadband data service delivery, including in-depth sensitivity analysis of key issues faced by the infrastructure providers. The line costs and payback periods of different access network technologies for infrastructure broadband upgrades are examined, subject to variation in parameters like the existing infrastructure, the broadband take rate, civil work costs, revenues, and rollout year. The work should enable establishment of guidelines for broadband infrastructure upgrade strategies     

AMUSE: advanced broadband services trials for residential users

The AMUSE project in the framework of the ACTS program sponsored by the European Union, has answered various questions related to the implementation and provisioning of new multimedia services. The means to pursue such objectives has been the setup and operation of small-scale trials in various European countries, involving real residential users. The article first presents the project as a whole. Then the focus is moved to evaluation of the different technologies experimented with in the field. AMUSE services have been supplied in the context of trial islands characterized by different access network typologies. Validation of the different access technologies and results coming from their installation, integration, and operation have represented a major objective of the project. Although it is very difficult to highlight particular outcomes from the technical experiments, with so many technologies put in place, some general indications emerging from the deployment of some of these technologies are supplied. Emphasis is then put on the facts and findings resulting from the activities performed in the Italian trial island, where interactive services, including fast Internet access from PCs or STBs, Internet TV style, and switched video broadcasting services have been offered. The article concludes with a summary of the major lessons learned from the trials and the identification of a number of key factors of success for interactive multimedia     

Storage area network extension over passive optical networks (S-PONS)

After 9/11 and the accidental failure of the power grid in North America in 2003, storage area network (SAN) extension has emerged as critical to ensuring business continuity. However, SAN extension encounters challenges in the access network, including scalability problems, cost challenges, bandwidth bottlenecks and low throughput. In this article, we propose a new solution to address these problems: SAN extension over passive optical networks (S-PONs). To tackle the scalability problems and cost challenges, we designed the S-PON architecture based on the existing point-to-multiple-point (P2MP) PON infrastructure. To address the bandwidth bottlenecks in SAN extension, we propose three solutions for carrying storage signals with gigabit-level transmission. We also introduce a new device, XtenOLT, for implementing buffer pools by a new buffer-management scheme to improve SAN extension throughput and utility. Our experimental results show that, in the physical layer, the proposed S-PON transmission technologies successfully deliver SAN traffic to the long-haul at the rate of 2.5 Gb/s; in the network layer, S-PON with XtenOLT dramatically enhances deliverable throughput and utility over long-distance transmission.     

Broadband video distribution over passive optical network using subcarrier multiplexing techniques

A 16-channel subcarrier-multiplexed video system has been optimised for operation over a passively split optical network. The system delivers a weighted SNR of 47 dB with an optical power budget of 34 dB and a dynamic range of 19 dB.<>     

无源光网络的技术研究

网络已经成为当今人们交流信息的一种方式,介绍了无源光网络(PON)的三种技术。它打破了传统的点到点的解决方法,是解决宽带接入问题一种经济的、面向未来的用户接入技术。三种无源光网络技术分别是:APON,EPON和GPON,将三种技术的优点、缺点进行分析比较,展望PON未来发展前景,充分肯定了PON是解决入网问题的最好方案。     

Implementation of a broadband integrated services hybrid network

The issues involved in the design of a broadband integrated services digital network (B-ISDN), that utilizes optical fibers in the subscriber loop, are considered. A hybrid scheme that provides integrated access to ISDN and broadband services by delivering voice/data signals in a digital format while using an analog format for full-motion video services to subscribers is proposed. The discussion covers planning for a B-ISDN, the system concept, implementation, the loop fiber network, subscriber equipment, and cost comparison and analysis     

三种宽带无源光接入网技术比较

无源光网络(PON)是一种新兴的覆盖最后一公里的宽带光纤接入技术.随着PON的发展,应用于PON的技术也层出不穷,基于ATM的无源光网络(APON)/宽带无源光网络(BPON)、以太网无源光网络(EPON)以及最近出现的千兆以太网无源光网络(GPON)技术都进一步推动了宽带光接入网的发展.文章回顾了宽带PON技术的发展,介绍了3种宽带PON技术,并对它们进行了比较和分析.     

Upgrade of passive optical subscriber network

An upgrade method is described for a two-way broadband service transmission of a previously proposed passive optical subscriber network (PASS-NET) PASS-NET uses optical frequency division multiplex/time-division multiplex (OFDM/TDM) techniques for downstream transmission and time division multiple access (TDMA) for upstream. Fundamental experiments for downstream transmission to two subscribers are executed to demonstrate the possibility of the upgrade method. Two wavelengths emitted by a distributed Bragg reflector-laser diode (DBR-LD) tunable laser with a 5-GHz (0.04-nm) space between them are directly intensity modulated at 32 Mb/s. Each wave transmits narrowband service to each subscriber. The third wavelength emitted by another DBR-LD tunable laser with an 11-nm separation from the two wavelengths is directly intensity modulated at 100 Mb/s and overlaid     

小区宽带+WLAN融合业务实现方案

数据业务飞速发展,传统GPRS已经无法满足用户的需求,WLAN成为重要的补充手段。为了吸引更多的固网用户,小区宽带业务的市场也非常重要。小区宽带+WLAN融合业务正迎合了市场与技术发展的这些需要。本文研究了PPPoE与WLAN的实现原理、城域网组网结构以及业务需求,设计出小区宽带+WLAN融合组网方案,并通过实验验证方案的可行性。本文工作对小区宽带+WLAN融合业务的技术实现、商业运用有着极为重要的意义。     

A hybrid approach to the transmission of telephony over a passive optical network

Passive optical networks (PONs) are attractive for the provision of telephony via optical fibre in the local loop, and have generally tended to concentrate on the use of time-division multiple access for transmission. This paper describes a hybrid transmission method using sub-carrier multiplexing (SCM) and time division multiplexing (TDM) which seeks to reduce the overall complexity of the system, thereby lowering costs.     

Optical network for broadband services in the subscriber loop

During the course of the last ten years optical transmission systems have more and more taken over the functions of their copper counterparts in the trunk network. However, replacement of copper-based transmission by optical-fibre-based transmission is only the first step in the utilisation of the large transmission capabilities of optical fibre. Deployment of optical fibres will penetrate further to the local loop to bring broadband and narrowband services directly to the customer. In the RACE 2024 project research is being undertaken towards a cost-effective broadband access facility (BAF) for the small business and residential customer and based on the asynchronous transfer mode (ATM). The authors highlight the characteristics of a suitable passive optical network to be used in the BAF system. Following an overview of the complete BAF system layout, attention is focused on the optical network, topology and realisation aspects