第三代移动通信WCDMA无线接入网

WCDMA（UTRA FDD）是第三代移动通信的主流标准,预计会在全球大多数地区得到广泛的应用。WCDMA的标准化进程会影响到其无线接徼网络（RAN（的研发,生产和运营,从当前标准化进程和技术趋势看,Release 99是必经的阶段,对于无线接入网络设备和相应的网络规划和优化软件,需要按照高的频谱利用率,灵活的多业务承载能力,多样化组网方式等要求来完成,以满足移动难环境和电信运营的需要。     

Cognitive Management of Devices in the Wireless World

The success of mobile networks has been driven by the services offered, i.e. voice in second generation and multimedia services in third generation networks. Similarly, a key issue for the success of future generation networks is considered to be the provision of enhanced, always available, personalised services. At the same time, the complexity and heterogeneity of the infrastructure of mobile network operators increases as Radio Access Technologies continue to evolve and new ones emerge. All these issues call for self-management and learning capabilities in future generation network systems. Cognitive, reconfigurable systems encompassing self-management and learning capabilities have been devised as a solution in this direction. Cognitive systems determine their behaviour, in a self-managed way. This is done reactively or proactively, based on goals, policies, knowledge and experience obtained through learning. This paper focuses on the user device and presents a Cognitive Device Management System that comprises mechanisms for dynamically selecting the optimal device configuration, taking into account user preferences, device environment characteristics (context), policies, and knowledge established through machine learning functionality.     

3G防火墙中GTP策略的设计

随着3G技术和标准的完善,系统和终端的成熟,业务和应用的发展,3G已在日、韩、欧洲等国家和地区进入商用阶段,国内运营商也在加紧对3G网络的部署.为了保证3G系统中核心网(CN)的安全,防止外部网络攻击,保护终端用户安全,必须在核心网络的Gn/Gp,Gi口部署3G防火墙.文中通过对3G网络、GTP协议的分析,给出了3G防火墙中GTP策略的设计.     

UMTS-mobile communications beyond the year 2000: requirements,architecture and system options

To support the massive demand for mobile services third generation land mobile systems will be based on a new architecture concept and adaptive techniques. Moreover, these systems are expected to offer service quality comparable to that of fixed networks contemporary to their deployment. UMTS (universal mobile telecommunication system) is the developing pan-European concept for third generation mobile systems. The paper briefly overviews the requirements for and the emerging architecture of the UMTS as they appear at the transition between two RACE research phases and the beginning of dedicated standardisation activity in ETSI     

数字移动通信系统中的用户认证方案

分析泛欧移动通信网(GSM)的用户认证方案的不安全因素;指出数字移动通信网的安全策略;提出两种适合移动通信的有效的认证协议。这类协议减轻或消除了在无线链路上收集信息的外部攻击者、或能在一定程度上接入系统秘密信息的内部攻击者的安全威胁,并且两者提供了信息保密、主叫身份保密、欺诈控制等安全服务。     

Development of Mobile Communications Systems Beyond Third Generation

Second generation mobile radio systems have been successfully deployed worldwide. These systems are evolved to higher data rates and packet transmission. Third generation mobile radio systems will be initially deployed in 2001 and 2002 in different regions of the world. Advanced multimedia services are under development and first services are already being offered in second generation systems. Due to the megatrend of the rapid growth of Internet type services packet oriented traffic is exceeding circuit switched traffic. Therefore, communication systems will be developed and optimized for packed oriented traffic. This paper presents a vision of a system beyond third generation mobile communications, which comprises a combination of several optimized access systems on a common IP based medium access and core network platform. These different access systems will interwork by horizontal and vertical handover, service negotiation and global roaming. The different access systems are allocated to different mutually complementing cell layers with respect to cell size, coverage and mobility to provide globally optimized seamless services to users.     

通信网络安全防护综述

随着通信网络IP化不断发展以及通信业务的多样化发展,通信网络面临越来越多的安全威胁.如何应对安全威胁进行有效的安全防护是当今通信网络面临的重大挑战,本文综合分析了当前通信网络面临的安全形势,提出了通信网络的安全防护措施,对重要系统以及新业务网络的安全防护方法.     

Chain authentication in mobile communication systems

Digital mobile telecommunication systems have become a future trend in personal communications services (PCS) networks. To satisfy the demand for high quality services, security functions, including the authentications of communication parties and the confidentiality of communication channels, must be embedded into mobile communication systems. This work presents an authentication scheme to support the security functions. The proposed protocol significantly improves the performance of authentications and ensures the security of mobile communications in a large-scale communication network with multiple service providers. This revised version was published online in June 2006 with corrections to the Cover Date.     

3G UMTS中的IP多媒体子系统探析

下一代的移动通信系统将基于全IP的网络构架,提供开放的业务生成环境。3GPP在其UMTSR5版本中首次引入了IP多媒体子系统(IMS)的概念,作为下一代网络的重要平台,IMS不仅实现了固网与移动网业务的无缝融合,还有利于运营商快速、灵活地开发更加丰富多彩的移动多媒体业务,从而吸引大量的终端用户。文章在描述IMS体系结构的基础上,特别针对IMS中几个关键要素点进行了重点分析。     

Mobility management in All-IP mobile network: end-to-end intelligence or network intelligence?

The mobile telecommunication network is morphing into an All-IP mobile network with diversified radio access systems. The All-IP mobile network should be established by converging the mobile telecommunication network and the fixed Internet. This article opens a debate on whether mobility management should be implemented as end-to-end intelligence or network intelligence.     

TD-SCDMA/GSM双模系统两模式间小区选择的研究

TD-SCDMA技术是中国具有自主知识产权的第三代移动通信技术.从中国移动通信的发展现状看,在中国,未来TD-SCDMA网络将和GSM网络长期并存,而小区选择是移动终端能够成功驻留在合适的小区并保证呼叫成功率的重要功能,同样也是不同无线通信系统间的主要互操作行为之一.文中根据协议给出TD-SCDMA/GSM双模终端软件结构图,对TD-SCDMA/GSM双模系统两模式间小区选择问题进行了深入的探讨,并对两模式间小区选择建立过程模型.     

Réseaux à large bande intégrant les services de télécommunication *

With the important breakthrough of optical fibre techniques over the past few years, a new type of broadband networks is emerging offering a wide range of services, including existing telecommunication services. The French telecommunication administration installs presently a first generation of broadband networks using optical fibres and broadband switchings, the so-called vidéocommunication networks. When specifying these networks, one important aspect was to assure that these networks can also offer telecommunication services and can evolve in a way to become the basis of a future national telecommunication network. The paper describes the approach adopted for the interconnection of these vidéocommunication networks with existing or planned telecommunication networks.     

WWRF - the Wireless World Research Forum

Third generation mobile radio systems are currently being deployed in different regions of the world. Future systems beyond the third generation are already under discussion in international bodies and forums such as ITU, WWRF and R&D programmes of the European Union and in other regions. These systems will determine the research and standardisation activities in mobile and wireless communication in the next years. Based on experience of the third generation, future systems will be developed mainly from the user perspective with respect to potential services and applications including traffic demands. Therefore, the Wireless World Research Forum was launched in 2001 as a global and open initiative of manufacturers, network operators, SMEs, R&D centres and the academic domain. WWRF is focused on the vision of such systems - the Wireless World-and potential key technologies. This paper describes the international context of activities on systems beyond third generation, the goals, objectives and structure of WWRF, the user perspective as the starting point for a future system design and the key enabling technologies for the Wireless World.     

Completing the convergence puzzle: a survey and a roadmap

Convergence has more than ever been a central issue for fixed and mobile operators throughout the world and is considered to be the next big step in the evolution of telecommunication networks. Convergence opens new market opportunities and competition among network operators and above all offers enhanced user experience. Multimode handsets and the proliferation of terminals and access technologies are generating increasing demands for solutions that enable convergence, seamless handover, and transparent service delivery across heterogeneous access networks. Different strategies are available for operators, depending on the services they intend to deliver to their customers, from basic commercial convergence limited to unified billing for Fixed/Mobile/Internet up to in-dept network convergence covering new applications and services. This article surveys different technologies which offer seamless handover and converged access to mobile voice, video, and data services. It provides first the different network parts involved in defining the operator global convergence strategy and then surveys different technologies which achieve this step-by-step convergence. We present the main features of these technologies and discuss their limitations and potentials to enable convergence in heterogeneous networks. We also provide a personal stance as to the emergence of these technologies and our vision towards the long term converged telecommunication networks.     

Mobile Network Evolution – “The Return of the Pipe”

The mobile network evolution from second generation to third generation systems has opened possibilities for inclusion of new technologies both in the network infrastructure as well as on the radio access. Within this paper, we concentrate on the evolution of the network infrastructure towards a future mobile network that balances the demand for increased flexibility with the necessity of limiting system complexity. Based on existing architectures, to lower complexity such as layered architecture for the core network and mobile packet backbone, we describe one possible evolution path for the control layer. Our approach is a step towards a control space that includes packetpipe control functions for a multitude of packetpipes. Such control function needs to be supported in the heterogeneous networks of today and the future.     

Radio Access in a System Beyond 3G

This paper gives an overview of the envisaged requirements and building blocks for mobile communication systems beyond 3G (B3G). It analyzes the drivers for such a system taking into consideration the key areas “services”, “network” and “radio” and presents possible corner stones for an appropriate radio interface. Hence it gives an overview how a future system B3G may look like.     

The Development of Mobile is Critically Dependent on Standards

The development of mobile standards has been a key factor in the widespread success and take-up of second generation (2G) cellular systems. Well though through standards, including roaming aspects, have enabled operators, using equipment from different manufacturers, to create global mobile networks, which allow users to roam seamlessly and obtain largely the same services wherever they happen to be. Third generation (3G) standards have built on the success of 2G and have increased the global awareness and applicability. In this light, this paper discusses the background for mobile standards and the factors that are influencing their ongoing development for third generation and beyond.     

IPv6关键技术的分析

网络和业务正在趋向于进一步的融合，用一个网络完成电信网、计算机网、广电网的各种业务通信，一直是人们追求的目标。这种融合一定程度上更依赖于统一的网络技术平台的建立，IPv6技术无疑是未来的代表。广电行业在启动数字电视建设的同时，更应该关注IPv6技术的发展。就LPv6关键技术领域，包括高性能：IPv6路由器和交换机系统、IPv6主机和智能终端接入系统、IPv6移动接入系统和：IPv6网络安全系统等相关方面进行介绍。     

我国移动通信网从第二代到第三代的演进策略

随着第三代移动通信标准的日趋成熟,其产品预计可在2004年前后投入商用。本文在分析市场需求、技术发展现状和保护已有设备投资的基础上,从保证我国移动通信产业、运营商和移动用户利益出发提出：第一步,在IMT－2000核心网成熟之前,采用现有的GSM／GPRS核心网,通过A和Gb接口提供话音和数据业务;空中接口采用频谱利用率高、符合IMT2000要求的TD－SCDMA技术,以满足高话务量区域的需求。第二步,采用成熟的IMT-2000核心网（Release2000)、IMT2000FDD和TD－SCDMA无线传输技术,逐步形成第三代移动通信系统。     

Resource management and quality of service in third generationwireless networks

The third generation networks and services present opportunities to offer multimedia applications and services that meet end-to-end quality of service requirements. The key parts of the standards are already in place, and limited 3G services have already been turned on. While the evolution to 3G occurs, many operators will implement 2.5G interim solutions for a good period of time. We discuss the various evolution scenarios from the present 2G networks to 3G networks. Then we present the UMTS QoS architecture and its requirements, followed by a discussion on QoS in 3G air interfaces, radio access network, and core network