中国未来移动通信研究展望

文章介绍中国移动通信的现状和国际移动通信的发展趋势.描述了未来移动通信发展的基本技术要求,阐述了中国未来移动通信研究开发的构想,提出了在未来移动通信研究方面进行国际合作的措施.     

我国未来移动通信的研究开发展望

分析了我国移动通信的研究现状以及国际移动通信的发展和研究趋势，阐述了未来移动通信的关键技术问题，对发展我国未来移动通信的基本策略提出了若干思考和建议。     

移动通信发展的回顾及展望

简要回顾了移动通信发展历程,介绍了目前第3代移动通信(3G)发展现状及技术演进路线,并对移动通信未来发展进行了展望。     

未来无线移动通信系统与网络

分析了未来通信业务和通信网络的发展趋势，提出对第四代移动通信系统开展研究，对无线移动通信系统和网络的发展提出了一些看法。提出了一种未来无线移动通信系统的设想，并对其中的关键问题进行讨论。     

4G移动通信技术应用与发展的展望

进入二十一世纪以来,移动通信领域加大了技术科技研发的力度。自4G移动通信技术出现后,3G移动通信技术市场受到巨大冲击,未来4G移动通信领域发展前景一片广阔。基于此,本文通过对4G移动通信技术进行简述,对4G移动通信技术的关键技术进行分析研究,并对未来4G移动通信技术的发展做出美好的展望。     

对4G移动通信技术应用与发展的展望

移动通信技术的发展给人们带来了生活上的便利和生产上的帮助,在第三代移动通信技术已经正式商用的今天,我们应该将目光放长,观察角度更多元,用发展的观点去看待新型的移动通信技术。4G移动通信技术是在前三代移动通信技术基础上发展起来,具有高速、抗干扰和更兼容的优势,是通信行业未来发展的必然。本文对4G移动通信技术进行了分析,阐述了4G移动通信技术的结构和技术关键,对4G移动通信技术的应用和发展进行了展望。     

未来宽带移动通信网络技术发展的一些思考

宽带移动通信技术已经成为国际技术与产业竞争的焦点。本文对宽带移动通信技术的发展历程进行了阐述,并对未来宽带移动通信网络技术的发展做了一些思考。     

浅析4G通信技术的发展现状和应用趋势

4G移动通信技术已经逐渐走进人们的生活,成为新一代移动通信技术的"领头羊"。不难判断,未来的移动通信将成为4G的天下,而研讨相关话题则具有前瞻性的现实意义。文章对4G移动通信技术的发展现状和未来应用趋势进行了简要论述,提出了一些个人的思考和见解。     

移动通信100年

本文值移动通信诞生１００ 年之际，对移动通信的发展历程作了较详细的介绍，并对当代移动通信的发展趋势及其产品开发的特点作了分析，最后对未来移动通信的发展领域，以及对移动通信的理想目标———个人通信进行了阐述。     

迅速发展中的蜂窝移动通信技术

蜂窝技术是移动通信中最重要的技术之一。本文通过对模拟蜂窝移动电话系统、数字蜂窝移动通信系统、码分多址数字蜂窝移动通信系统以及第三代移动通信系统发展过程的介绍和技术特性的比较,对未来全球移动通信的发展趋势以及市场进行了预测和展望。     

未来移动通信系统及其关键技术

文中介绍了未来移动通信系统的特点和网络架构。讨论了未来移动通信物理层的正交频分复用技术（OFDM）、多入多出系统（MIMO）、认知无线电技术、软件无线电技术以及自适应调制与编码技术等传输的关键技术以及相应的网络结构和协议。最后对未来移动通信系统的发展进行了一定的展望,即未来移动通信系统应该具有高教据率、高频谱利用率、低发射功率、灵活业务支撑能力等特点。     

未来中国4G开放移动通信终端和网络接入架构

This paper relates to an advanced open mobile communication system and method of integrating the mobile communications, wireless access systems and wired communications into one common platform architecture for China＇s 4th generation mobile communications, supporting costeffective broadband voice, data and video services in wireless, mobile and wired environment with one single integrated mobile terminal device. The paper includes new architecture in the integrated mobile device and converged network access, and minimum modification in the existing mobile telecommunication infrastructures. This paper introduces the long-term evolution strategy for China＇s TDD system platform towards China＇s future 4G mobile communications.     

软件定义无线环境:技术、机遇与挑战

无线环境通常表示能够显著改变电磁波在通信设备之间传播的物体集合.软件定义无线环境允许针对不同通信设备以最适宜的方式进行电磁传播规律的编程定制,为无线通信的发展提供了一种新的视角.相比被动抑制无线信道影响的传统通信技术,软件定义无线环境有着更高维度的调控自由度,在新一代移动通信特别是毫米波及太赫兹通信领域具有很大的应用潜力.本文首先介绍了软件定义无线环境的概念、历史沿革及其研究现状.然后给出了其基础模型及相对传统手段展现出来的性能优势.接着总结了软件定义无线环境的系统设计、网络服务支持、网络通信协议等关键技术,并指出软件定义无线环境未来发展所面临的挑战.最后凝练了几个面向新一代移动通信技术的软件定义无线环境研究方向.     

IPv6 for Future Wireless Networks

The functionalities of the next generation Internet protocol, IPv6, havebecome increasingly interesting due to the current merging of the traditionalcellular mobile communications and the traditional data-communications intothe future wireless systems, as e.g., UMTS. IPv6 provides several enhancedfunctionalities requested for the future mobile systems. In this article thelargest advantages in relation to mobile systems are presented. Variousaspects of introducing IP throughout the entire mobile network (core, accessand termainals) are also presented along with an illustration of the abilitiesof the future wireless network.     

The architecture and a business model for the open heterogeneous mobile network - [ITU-T kaleidoscope]

The mobile communications market has grown rapidly over the past ten years, but the market could reach saturation in the foreseeable future. More flexible mobile networks that can meet various user demands and create new market openings are required for further growth. Heterogeneous networks are more suitable than homogeneous networks for meeting a wide variety of user demands. There are two types of heterogeneous networks: a closed type, where network resources are deployed and operated by communication carriers, and an open type, where network resources can be deployed not only by existing operators, but also by companies, universities, and so on. It will be easy for newcomers to enter mobile businesses in an open heterogeneous mobile network so many innovative services are likely to be provided through cooperation between various companies or organizations. This article proposes a revised architecture for TISPAN-NGN, which corresponds to heterogeneous networks and open mobile markets, and presents a new business model.     

第四代移动通信系统及其关键技术研究

本文介绍了第四代移动通信系统的产生背景、特点和网络架构,讨论了第四代移动通信物理层的关键技术(OFDM、MIMO等)、网络和协议,最后对未来移动通信系统的发展进行了展望.     

移动通信网中的数据库系统

为实现移动通信的各种网络功能,在移动网中设立了各种不同功能的数据库。文章分析了移动网络数据库系统的功能、特点和结构,探讨了网络数据库的多重并发性和数据一致性的问题并介绍了网络数据库适应个人通信发展的演进技术和策略。     

Mobile Radio Communications in Japan

After a short historical sketch of mobile communications in Japan, technical problems and future prospects are described. The peculiarities characteristic of mobile communication include complicated radio propagation and requirements for continuous communication and determination of mobile subscribers' location. This paper discusses major problems of future mobile communication, for example, radio propagation, controlling, and switching and radio equipment involved in meeting the future demands of a large number of subscribers over widespread service areas. Effective use of an electronic switching system will enable the mobile communication network to be integrated with existing fixed communication networks.     

Modeling and performance evaluation of a cellular mobile network

An analytic model of cellular mobile communications networks with instantaneous movement is investigated in this paper. This cellular mobile network is showed to be equivalent to a queueing network and furthermore the equilibrium distribution of this cellular mobile network is proved to have a product form. The explicit expressions for handoff rates of calls from one cell to another, the blocking probability of new calls and handoff calls are then obtained. Actual call connection time (ACCT) of a call in this cellular mobile network is characterized in detail, which is the total time a mobile user engages in communications over the network during a call connection and can be used to design appropriate charging schemes. The average ACCT for both complete call and incomplete call, as well as the probability for a call to be incomplete or complete, are derived. Our numerical results show how the above measures depend on the new call arrival process for some specific reserved channels numbers in each cell. The results presented in this paper are expected to be useful for the cost analysis for updating location and paging in cellular mobile network.     

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