EPON和WiMAX融合架构下带宽分配和调度机制的研究

以太网无源光网络(EPON)和IEEE 802.16(WiMAX)的融合网络在固定移动混合接入网中被认为是很有前景的接入方式.文中提出了3种WiMAX无线网络与EPON网络系统融合架构,融合系统同时具有光网络的高带宽和无线网络的灵活性.为了在接入网中支持QoS,本文为融合结构提出了一种动态带宽分配算法(DBA)和调度机...     

EPON和WiMax融合架构下带宽分配算法的研究

EPON和WiAMX的融合架构提供了一种低成本、高带宽和高覆盖的接入网的解决方案.EPON和WiMAX有着不同的服务质量(QoS)体系模型,对于融合架构来说,如何建立统一的带宽分配策略,实现区分多业务和保证QoS是需要面对的一个问题.文章设计了一个融合网络下的带宽分配框架,详细分析了带宽申请和分配的过程,并给出了具体的算法设计.     

EPON和WiMAX融合网管带宽管理模块设计实现

在EPON和WiMAX融合接入网中,为对网络带宽进行管理,需要结合WiMAX业务在EPON网络中的映射情况,对各级带宽进行配置.针对这一需求,设计实现了能够自动对带宽进行重新分配的带宽管理模块.该模块具有友好的图形化操作界面和合理的带宽配置算法.采用了典型的C/S结构进行模块划分和设计,利用Java语言结合NetBeans等工具完成了具体功能的实现.     

基于ROF技术的EPON和WiMAX融合方案的研究

从接入网看,光纤无线融合是一种很有前途的架构,文章提出了一种基于光纤无线电(ROF)技术的以太网无源光网络(EPON)和全球微波接入互操作性(WiMAX)合方案,能够同时在光纤中传输EPON基带信号和WiMAX无线射频信号.在此基础上,文章详细说明了该方案的一些特点,包括数据的上下行传输、冗余保护、漫游等问题.     

以太网组网确保OLT可靠汇聚

FTTx与三网融合掀起了接入网的革命,EPON技术在IP城域网中大量应用。运营商在不断升级、更换原有的接入网设备,原有的网络架构已经发生质的改变。然而在接入带宽大幅度提高的同时,     

一种EPON-WiMAX融合网络带宽分配算法

文中提出了一种应用于EPON和WiMAX的融合网络,实现用户多优先级业务区分并保证用户QoS的动态带宽分配算法。算法让EPON网络和WiMAX网络协同分配带宽,在EPON网络带宽分配的过程中加入WiMAX网络的带宽分配。整体算法使得因得不到足够带宽而受到影响的用户数保持在最小,同时加入令牌机制兼顾了用户之间的公平性。文中在现有融合网络框架的基础上提出算法,并给出了算法的具体设计步骤,详细分析了带宽申请和分配的过程,讨论了算法的优越性。     

基于EPON的FTTx接入网建设关键问题探讨

基于EPON的FTTx技术具有带宽高、可靠性高、维护成本低、技术成熟等优点,已成为近期各大电信运营商推进"光进铜退"的重要技术.OLT融合了接入、汇聚、交换功能,使EPON技术的引入改变了传统的电信接入网络的架构,打破了传统接入网和汇聚网络明晰的分界线,并且改变了传统的接入、数据、软交换3个专业各自为政的局面,因此如何建设和部署可运营的EPON接入网是个非常重要的问题.本文对基于EPON的FTTx接入网中OLT设备的网络定位、语音业务组网方式、综合化的网络管理架构3个关键问题进行了详细分析.     

基于EPON和WiMAX的融合网络(本期优秀论文)

固定移动融合已成为通信行业发展的一个基本趋势.在这个趋势和背景下,基于EPON和WiMAX的融合网络由于符合移动宽带化和宽带移动化的目标,正受到学术界和产业界越来越多的关注.综述了EPON和WiMAX融合网络的融合架构、部署与运营和相关的论文,并对融合网络未来的发展做了展望.     

FTTx网络的OLT规划与部署

基于EPON的FTTx技术具有带宽高、可靠性高、维护成本低、技术成熟等优点,已成为各大电信运营商进行宽带接入部署的重要技术.OLT融合了接入、汇聚、交换功能,使EPON技术的引入改变了传统的电信接入网络的架构,打破了传统接入网和汇聚网络明晰的分界线.因此如何建设和部署可运营的OLT平台是个非常重要的问题.本文对基于FT...     

EPON无线接入多媒体终端的设计与实现

EPON(以太网无源光网络)作为具有广阔应用前景的光纤接入网技术已经越来越多地应用于接入网系统中.文章提出将WLAN(无线局域网)技术与EPON系统相结合,实现EPON系统的无线接入服务.通过对这两种技术相结合的可行性的理论分析,对所提出系统的架构进行了描述,并通过系统测试验证了所提出系统的可行性和有效性.     

Fixed Mobile Convergence Architectures for Broadband Access: Integration of EPON and WiMAX [Topics in Optical Communications]

EPON and WiMAX are two promising broadband access technologies for new-generation wired and wireless access. Their complementary features motivate interest in using EPON as a backhaul to connect multiple dispersed WiMAX base stations. In this article we propose four broadband access architectures to integrate EPON and WiMAX technologies. The integrated architectures can take advantage of the bandwidth benefit of fiber communications, and the mobile and non-line-of-sight features of wireless communications. Based on these integrated architectures, we elaborate on related control and operation issues to address the benefits gained by this integration. Integration of EPON and WiMAX enables fixed mobile convergence, and is expected to significantly reduce overall design and operational costs for new-generation broadband access networks.     

EPON与WiMAX融合宽带接入方案的分析比较

文章分析了作为固定宽带接入与无线宽带接入代表的EPON和WiMAX两者融合的意义,以及相比传统单一接入方式的优势,阐述了三种基于EPON和WiMAX的有线与无线宽带接入融合系统的结构和相应的控制机制.在此基础上,分析比较了三种方案的特点,并指出了三种方案各自适合的应用场景.     

Universal broadband mobility target for post-TINA infrastructure:toward the fourth generation

Future universal broadband mobile services present a challenge for telecommunications architectures, control, and management. The focus of the future mobile (fourth) generation vision is turned from capacity to services, from radio to network-wide issues. New types of applications will evolve that should be supported by an adequate programmable intelligent telecommunications infrastructure. A convergence between telecom and datacom networks will happen based on the communications middleware concept, which will provide universal secure connectivity between mobile users and their applications. Actual specifications of TINA-C do not address all such necessary issues. There is a need for technology evolution, enhancement, and integration to meet these new requirements at different levels. The author the concept of the universal broadband mobile telecommunications systems (UBMTS, or simply UBM) described as fourth-generation mobile systems. The UBMTS objective is both to extend mobile user access to the range of broadband services that will exist for broadband integrated services digital network (B-ISDN) users, and to extend the customization of new services related to personal communications systems (PCS) users     

Broadband wireless access

This article reviews the technologies and potential markets, applications, and architectures for broadband wireless access. The emergence of wireless communications for cellular systems is presented, together with its projected future evolution to mobile wideband systems. The field of broadband access systems, services, and network architectures is also covered, and then systems for broadband wireless communications for indoor local area networks and outdoor public fixed access networks are discussed. Broadband wireless access systems are emerging as a new and growing area of telecommunications, since the ability to provide access without extensive installation of copper or fiber infrastructures make wireless technology well suited for broadband services. Finally, some of the key enabling technologies, such as adaptive antennas and video compression, and the future architectural directions of broadband wireless networks are presented     

Handover management in integrated WLAN and mobile WiMAX networks [recent advances and evolution of WLAN and WMAN standards]

Recently there has been much effort, in both academia and industry, to integrate a plethora of wireless technologies in order to provide ubiquitous broadband access to mobile users. Handover management is still one of the most challenging issues to be solved for seamless integration of wireless networks. This article addresses the integration of IEEE 802.11 WLANs and IEEE 802.16 WMANs, focusing mainly on the handover management aspects. First, we describe architectures, futuristic application scenarios such as the envisioned heterogeneous multihop wireless networks (HMWNs) and moving networks, as well as the related research issues. Second, we present IEEE 802.21, a new emerging standard aimed at providing a framework for media-independent handover (MIH) among heterogeneous networks. Finally, we discuss how the MIH framework can help handover management for the integrated network.     

WiMAX应用潜力分析

文章分析了WiMAX在固定宽带无线接入场合和便携、移动通信场合的应用前景.文章认为:在固定宽带无线通信中,WiMAX会广泛应用于家庭用户、IP语音用户、传输承载用户和集团客户,为他们提供宽带无线接入;在便携、移动通信中,IEEE802.16即将集成到笔记本电脑和个人数字助理(PDA)等便携式电子设备中,实现在城域网范围内的可移动的宽带无线数据服务;用户需求加上WiMAX设备的批量上市及终端成本的下降,WiMAX的应用潜力巨大,市场将呈几何级增长.     

光纤通信技术最新动向

先讲光纤通信在国家宽带通信网的骨干运输网中应用和技术的新发展，包括宽带光纤放大器，密集波分多路系统，激光器－调制器集成，光电子集成接收端机以及光子器件和全光通信网，然后介绍光纤通信在市内接入网，有线电视网和专用局域网中应用和技术新发展，包括光纤连到住家，光纤连至路边，光纤连至大楼三种情况，以及光纤与同轴混合和无源光纤网两种办法，最后，讲到固定通信与移动通信聚合，光纤与无线并重，光纤通信技术将继续加     

Integrating users into the wider broadband network via high altitude platforms

An overview of CAPANINA, a project funded by the European Commission's 6th Framework Programme, is presented. The project is developing communications technologies for use with aerial platforms with the aim of integrating users in hard to reach areas and those disadvantaged by geography into the wider broadband network. The article discusses the three broad areas of the project. Specific aspects covered include broadband applications and services selection, along with appropriate integrated delivery configurations to deliver the required capacity and upgradeability; and the associated trials, along with the required wireless and free space optical equipment. Longer-term research underway into delivering broadband backhaul to high-speed trains from aerial platforms, enabling integration with onboard WLAN access points, is also discussed.     

TD-LTE关键技术在水利防汛中的应用

TD-LTE通信技术采用了国际上先进的LTE通信技术体制,以TDD双工方式为特征,是我国自主创新的TD-SCDMA的演进技术,是下一代移动通信与宽带无线接入融合的典范,也是未来宽带移动通信的主流标准之一。结合水利通信业务的发展,文中分析了TD-LTE的关键技术及特点,并给出了基于TD-LTE技术的网络架构,同时重点介绍了其在水利防汛中的应用。