移动智能数据业务的关键技术研究

移动数据业务近几年得到了快速的发展,如何与智能业务相结合成为新的关注焦点.智能网作为一种应用广泛的网络体系结构,在与数据业务结合的过程中需要做相应的改动.本文介绍和分析了智能网和移动数据业务的相关技术,对两者结合时的体系结构、业务接入方式、鉴权计费、业务开发语言等关键问题展开了讨论,并对移动智能数据业务的应用前景进行了展望.     

打造智能的城域光网络——访烽火通信科技股份有限公司总裁助理杨壮

众所周知，传统的SDH网主要是针对话音业务而建设的，随着近几年数据业务的迅速膨胀，如何在网络中有效承载和传送数据业务已成为运营商关注的焦点。目前，运营商普遍都建立起庞大而完善的面向TDM业务的SDH网络，完全抛开原有的网络资源，重新建设面向数据业务的网络是不太现实的。因此，在SDH技术上增加对数据业务的支持，特别是对以太网的支持，成为运营商解决数据业务在网络中传送中最有效的解决方案。基于SDH之上的MSTP技术因能有效承载语音、数据等多种类型的业务而成为城域网建设的主流技术，随着它的日益发展和在实际网络中的不断应用，业务互通及标准化问题逐渐显现。     

铁通宽带城域网建设

1城域网概述当前，各运营商已经形成了普遍的共识：数据业务将取代语音业务成为运营商的主营业务；宽带接入将取代窄带接入成为主要的接入方式。为了在未来的电信竞争中处于优势，取得竞争的主导地位，各运营商都在积极进行宽带城域网的建设。城域网是以宽带光传输为开放平台，通过各类网关实现语音、数据、图像、多媒体、IP接入等业务和各种增值业务及智能业务，并与各运营商长途网互通的本市（地）综合业务网络。作为数据骨干网和长途电话网在城域范围内的延伸，城域网承担着集团用户、商用大楼、智能小区的业务接入和电路出租任务，具有…     

一种有效解决TD-SCDMA终端业务互通的思路

主要通过分析移动数据业务发展的现状,发现终端成为业务互通的瓶颈,通过总结各方为突破这一瓶颈问题所作的努力.得出了这样一种结论:终端业务平台 开发社区将成为一种新型的终端开发模式,是系统性解决目前终端业务互通问题的有效手段.基于这个论点,提出了适用于TD-SCDMA领域的初步解决思路和基本框架,并认为TD-SCDMA网络具有后发优势,将能够更彻底地解决终端业务互通问题,在业务支持方面将超越其它网络.     

中国移动VGOP系统部署两年 数据业务平台整合初见成效

VGOP平台的建设实现了不同业务间的能力互通和跨平台的业务能力,有效地解决了不断增长的数据业务与集中化管理之间存在的矛盾。融合是电信运营业长久以来的话题—并非因为它已被业内奉为趋势,而是来自运营商内部实实在在的营销压力驱动。     

软交换体系中H.323和SIP协议的互通

软交换技术是下一代网络(NGN)的核心技术,它可以成为下一代分组网络中为语音业务、数据业务和视频业务提供呼叫、控制和业务的核心,同时也是电路交换网向分组网演进的关键：H．323、SIP、MGCP等信令系统之间的互通．是我们实现软交换核心设备的基础：本文简要介绍了软交换技术,讨论了软交换体系中H．323与SIP信令协议．并研究两者之间的互通问题。     

CDMA移动通信系统中的数据互通

本文简要阐述了ＣＤＭＡ移动通信系统中的数据业务的种类、业务及相应的协议模型、业务处理过程,并根据ＩＳ－６８７具体描述了数据互通单元（ＩＷＦ）的Ｌ接口协议,提出了相应的参考实现方案。     

数据业务的OSS策略

1引言数据业务是近年来增长最快的电信业务，也是未来最具潜力的电信服务。数据业务的开发和普及虽然较快，但针对数据业务的运营支撑系统的建设和应用却显得相对滞后。由于数据业务的业务特点、营销方式以及网络特征与传统电话业务都有着显著的差别，所以有必要按照数据业务的特点为其订制适合业务发展和网络运维的支撑系统。2从OSS看数据业务2.1数据业务的业务特点从OSS（运营支撑系统）的功能实现，可以把数据业务分为以下几类：拨号访问提供的数据业务、以专线方式提供的数据业务和基于带宽数据增值业务。拨号访问的数据业务有窄带的…     

广电宽带异构平台的对接应用以及推进构想

在广电一省一网整合的背景下,许多地方广电的网络平台和省网肯定存在不同的设备或者业务认证系统。在业务系统的对接中肯定会遇到许多跨平台中涉及到的技术细节问题,绍兴县广电也在这方面进行了不少实践。本文介绍了如何规避这些问题,实现在多个宽带异构平台上数据业务的互通。以及随着业务的发展,如何科学合理地推进实现,也是个值得深思的问题。     

基于TD-S系统功率调整的四网协同优化应用

随着智能终端的快速普及,以及移动互联网业务应用的飞速发展,数据业务将继续呈现指数增长态势,目前网络的数据业务流量已经大大超越语音业务数据业务消耗的网络资源,并且其所占资源将会是语音业务的几十倍甚至上百倍。为面对移动互联网给移动网络带来的巨大流量冲击,文章介绍了一种基于TD-SCDMA系统的功率调整的"四网协同"优化方法,通过调整PCCPCH信道功率,增强了TD-SCDMA网络的分流能力,提高了TD手机数据业务驻留比。     

PINT业务在软交换网络中的实现

文章介绍了智能网与Internet互通的原理,以及PINT(PSTN Internet iNTerworking)业务的基本概念和网络结构,并对PINT协议进行了分析.同时给出了智能网与Internet互联的模型,并结合点击拨号业务讨论了其具体的实现方式.最后讨论了互联时的安全问题.     

Mobility management alternatives for migration to mobile Internet session-based services

Session-based Internet protocol (IP) applications, such as Internet telephony, are an important component of the emerging mobile Internet. The ubiquitous availability of these services is critical to the success of the mobile Internet. Because all-IP networks will be deployed in phases and current mobile telecommunication systems will be in operation for decades to come, the interworking and migration between current network services and all-IP services is a key problem. In this paper, we address seamless roaming for session initiation protocol-based services across current cellular telecommunication networks and emerging all-IP wireless networks, such as those using third-generation and WiFi networks. We present an abstract mobility model, and map this model to three basic approaches for supporting seamless mobility: a master-slave approach, a federated system, and a unified approach. We discuss the challenges and implementation of an instance of the unified mobility management approach, called the Unified Mobility Manager, and then compare the tradeoffs of the three systems using a comparative performance analysis. We conclude that unified mobility management is most efficient if a great deal of interworking is required, and as more users invoke IP-based services; the federated approach is efficient when a single network technology is dominant and data access is limited, but requires sharing of data across networks; the master-slave approach is the least efficient, but is easy to introduce if the number of network types is small.     

Architecture for interworking data over PCS

This article presents a new approach for wireless service providers to offer data services by taking advantage of the existing infrastructure for voice services and interworking with existing wireline-based data services. The article presents a framework: for interworking between any wireless radio system and any data application on the wireline network. The interworking is provided by a common interworking function that uses a generic interworking control protocol (ICP). Any radio system capable of using the ISDN-based C-interface and implementing ICP can take advantage of the proposed approach. ICP is a generic protocol and can be implemented using different networks. The article considers an ISDN network for the lower-layer transport of ICP. Though the article focuses on interworking with the PSTN and the Internet, the architecture also allows access to other data networks     

Evolving intelligent interexchange network-an SS7 perspective

The role of common channel signaling, referred to as Signaling System No.7 (SS7), in the evolution of services in an interexchange carrier environment is discussed. The importance of SS7 in evolving the intelligent network necessary to support these services is addressed. Interworking with virtual private networks via the out-of-band ISDN messaging channel (D-channel) to extend the capabilities of SS7 network signaling to customer networks is also discussed. For ubiquitous support of ISDN, CLASS, and future services, the interworking of interexchange SS7 with domestic local exchange carriers as well as foreign administrations is critical. This service and intelligent network evolution is described. Emphasis is placed on services and the anticipated migration to those types of services which demand an intelligent interaction and close coupling of both virtual private networks and local public switched networks to the interexchange network     

Personal communications services through the evolution of fixed andmobile communications and the intelligent network concept

New telecommunications services tend to consider fixed network subscribers' requirements as well as mobile network subscribers' requirements. On one hand, subscribers of fixed networks would like to benefit from the mobility offered in mobile networks. On the other hand, mobile subscribers would like to access to services inherent in fixed networks. Personal communications services (PCS) meet this trend while allowing fixed and mobile convergence. In this environment, the application of intelligent networks (INs) to fixed and mobile networks is very convenient to realize PCS. Thus, the natural advancement of telecommunications systems (fixed and mobile) consists in the definition of new telecommunications architectures which take into account technologies from both fixed and mobile environments. This article studies how the IN is used to support mobility and interworking for PCS. Although mobility management already exists in cellular networks like GSM, it is desirable to use the IN concept to introduce flexibility. In addition, the IN allows the introduction of new supplementary services in PCS. Furthermore, the IN concept can be utilized to provide necessary networking functions for the integration of fixed and mobile networks. This article also highlights the involvement of IN in the definition of the global communications systems such as Telecommunication Information Networking Architecture (TINA), Universal Mobile Telecommunications System (UMTS), and International Mobile Telecommunications in the year 2000 (IMT2000)     

From POTS to PANS: a commentary on the evolution to Internettelephony

We describe some of the challenges and problems as we move from the world of plain old telephony services (POTS) to the promise of Internet-based pretty amazing new services (PANS). We present a set of ideas that relate the architectural evolution of networks and services to the underlying changes in technology. After examining the motivations behind the drive to Internet multimedia communications, we discuss the distribution of service intelligence in the future communications architecture. As with any period of evolution, thorny problems arise regarding interworking between the two network architectures. An exploration of the intelligent network is presented as a solution to address interworking. Finally, we examine how the transition to on Internet-based system might affect billing for transport and services     

软交换在3G网络中的应用与意义

控制、承载、业务的分离，则NGN（Next Generation Network,下一代网络）以及软交换（softwitch）技术的核心概念，3G技术则是目前无线通信技术的重要发展方向。本文在简单介绍NGN体系结构的基础上，对UMTS（通用移动通信系统）Release5核心网的技术构成进行了分析。借助于软交换技术，UMTS Release5也实现了控制、承载、业务的分离，从而可以保证3G网络与下一代网络的顺利融合。     

Transport architecture evolution in UMTS/IMT‐2000 cellular networks

Mobile evolution from the second generation (2G) to the third generation (3G) raises several important questions for operators and manufacturers. How to ensure that the old and current investments can still be utilized in the future? What is the optimum architecture? ATM or IP? Voice or data? There is no single correct answer to these questions, as it all depends on individual cases. In this paper, we discuss the transport architecture evolution for the universal mobile telecommunications system (UMTS)/international mobile telecommunications—year 2000 (IMT‐2000), or 3G cellular networks and interworking aspects between 2G and 3G cellular networks. The interfaces between access nodes in a cellular network and the changes incorporated to support packet data services are described. Emerging services such as mobile data, virtual private networks (VPN) and location aware networking are described. Role of ATM and IP in this new transport architecture is presented. Control and data plane interworking issues between different transport technologies are described. The new ATM standard, ATM adaptation layer type 2 (AAL2) and its applicability for transporting compressed speech in an ATM based cellular network is described. A similar approach in IP, multiplexing in real‐time transport protocol (RTP) payload to transport compressed speech on selective interfaces of 3G network, is introduced. Transport network architecture evolution within four different scenarios is evaluated. Special interest is focused on the protocol stacks and flexible layered solutions that allow smooth migration from one transport technology to another. Copyright © 2000 John Wiley & Sons, Ltd.     

Interworking between IP security and performance enhancing proxiesfor mobile networks

This article proposes the interworking between performance enhancing proxies (PEPs) and IPsec in mobile networks. The low-throughput problem due to TCP/IP in a radio access network is illustrated. Performance comparison among different PEPs implemented in the RAN is carried out in order to optimize the spectrum efficiency. By using PEP, end-to-end security is compromised, and we propose a concept to circumvent this problem. Furthermore, we propose a way to utilize PEP for different network loads. We suggest a scheme that allows the coexistence of IPsec and PEP over mobile networks, through adding an intelligent module in the node where the PEP is implemented