从宽带无线接入与宽带移动通信技术的融合看B3G技术的发展趋势

本文总结与比较了3GPP长期演进技术、3GPP2空中接口演进技术、IEEE 802.16e WiMAX技术和IEEE 802.20 MBFDD/MBTDD技术的标准化进程、系统需求和核心技术.在此基础上,本文讨论了宽带无线接入技术和宽带移动通信技术的融合趋势,并探讨了超3G技术的发展方向.     

E3G技术--3GPP LTE和3GPP2 AIE的核心技术与标准化进展

演进型3G（E3G）技术是3GPPLTE（长期演进）和3GPP2 AIE（空中接口演进）项目的统称.这项技术名为“演进”,实则是一场技术“革命”.对两种演进型3G技术--3GPP LTE和3GPP2 AIE的标准化进程、需求指标和核心技术作了简略的介绍.     

基于SAE/LTE项目未来移动通信系统的长期演进

3GPP在2004年12月启动了无线接入网长期演进研究项目,以及面向全IP的分组域核心网的演进项目,希望通过从无线接口到核心网络的持续演进和增强,保持自己在移动通信领域的技术先发优势和持续的竞争力.作者将SAE和LTE相结合,力图从系统结构演进的整体角度分析未来移动通信系统的网络长期发展趋势.文章最后对SAE/LTE项目的标准化工作进展进行了介绍.     

3GPP LTE标准化进展

为了保持在移动通信领域的技术及标准优势,3GPP启动其长期演进（LTE）的标准化工作。在物理层（层1）、空中接口协议结构层（层2）和网络结构方面,3GPPLTE采纳一系列先进技术和创新理念,IP语音（VoIP）业务和多媒体广播及多播业务（MBMS）的解决方案的优化正在进行中,目前已经实现高数据率、低时延和基于全分组的设计目标。     

3GPP LTE物理层关键技术

第三代移动通信3GPP组织为了应对宽带无线接入技术的竞争,于2004年底启动了长期演进(LTE)项目。自从启动以来,LTE项目在无线接口的关键技术、无线网络架构等方面取得了突出进展。本文综述LTE的项目计划及主要性能目标,并叙述TS36.211到TS36.214协议中目前已规定的LTE物理层关键技术。     

3GPPLTE计划浅析

为了把握新一轮的技术浪潮，保持在移动通信领域的领导地位，3GPP在2004年底启动了3G演进型系统，即LTE（长期演进）的研究与标准化工作，并计划在2007年发布第一个版本的系统规范。目前，该项目已完成了SI（研究阶段）的工作，各方面研究都取得了一定进展。文章简要介绍了LTE的背景情况、项目计划、主要性能目标、关键技术以及目前的研究进展和发展趋势。     

移动无线通信的过去和未来发展趋势

本文首先简要介绍了移动通信系统的发展历程,然后对3GPP系统、3GPP2系统和WiFi等宽带技术的标准,特点,系统参数、网络结构、应用范围和演进方向等进行了详细地比较和分析,重点讨论了3GPP系统无线接入网络演进过程中各种技术的标准、优缺点,改进措施及进一步演进,最后展望了未来移动无线通信的研究热点和发展趋势.     

下一代无线移动通信LTE及LTE-Advanced的研究

长期演进项目(LTE)是第三代移动通信合作伙伴项目(3GPP)为下一代无线移动通信最新制定的一项标准.重点研究了LTE的关键技术,并且详细分析了3GPP定位于满足ITU提出的IMT-Advanced的LTE-Advanced标准,包括它的发展历程、演进目标、技术指标以及新的关键技术.     

移动无线通信的过去和未来发展趋势

本文首先简要介绍了移动通信系统的发展历程，然后对3GPP系统．3GPP2系统和WiFi等宽带技术的标准、特点，系统参数，网络结构、应用范围和演进方向等进行了详细地比较和分析，重点讨论了3GPP系统无线接入网络演进过程中各种技术的标准、优缺点、改进措施及进一步演进，最后展望了未来移动无线通信的研究热点和发展趋势。     

TD-LTE系统空中接口协议栈研究

根据3GPP颁布的TD-LTE协议及TD-LTE技术的研究背景与技术特点,简要介绍了演进型接入网EU-TRAN空中接口的体系结构,分别从物理层、数据链路层和无线资源控制子层研究了TD-LTE无线接口协议。     

A Q-learning approach for machine-type communication random access in LTE-Advanced

Telecommunication Systems - Due to the wide proliferation of the 3GPP long term evolution (LTE) and LTE-Advanced systems as the air interface for 4th generation (4G) wireless systems and beyond,...     

5G高频设计及国际标准化分析

高频是移动通信的重要应用方向,也是5G设计的重要方向.3GPP在R15、R16及R17中对于高频都做了相关研究和标准化工作.结合3 GPP国际标准化工作,首先对高频的各种用例、部署场景进行了详细介绍;接着对3 GPP标准化中帧结构设计、接入设计、大规模天线设计和频域配置等关键技术进行了分析;最后对5G高频相关的国际标准化内容进行了总结和展望.     

3GPP LTE: The Future of Mobile Broadband

The mobile broadband technologies are reaching a commonality in the air interface and networking architecture; they are being converged to an IP-based network architecture with Orthogonal Frequency Division Multiple Access (OFDMA) based air interface technology. From technical perspective, fundamental goal of mobile broadband is to offer higher data rates with reduced latency. The third Generation Partnership Project (3GPP) presents the Long-Term Evolution (LTE) project in order to accommodate increasing mobile data usage and new multimedia applications. In the near future, with the recent progress made by technical specifications and vendor technology demonstrations LTE will emerge as successor to cellular systems as a broadband wireless solution. This paper provides an overview of 3GPP LTE including its history, features, technology, architecture and future. The technology components include OFDMA air-interface, Multiple-Input and Multiple-Output (MIMO) antenna technology and higher order modulation. The architecture includes Evolved Packet Core (EPC) and Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) components. This paper will concentrate to describe the main functions of the most important network elements. Also, the aim of this paper is to present the future potential of LTE which will make it an inevitable choice for wireless network operators around the globe.     

3GPP LTE及其物理层技术综述

3GPP长期演进(LTE)项目是近几年来3GPP启动的最大的新技术研发项目,自2004年项目开始以来,已经取得了一系列重大进展,目前已经实现高数据率、低时延和基于全分组的设计目标.现介绍了LTE的项目计划及主要性能目标,并介绍了为了达到这一系列性能要求所采用的主要物理层技术.     

5G核心网标准化进展及B5G演进初探

为了给后续B5G核心网技术研究和标准化提供思路,首先介绍了5G核心网的服务化架构,描述了网络切片、边缘计算等关键技术;然后介绍了3GPP R15核心网标准化成果,提出了5G核心网系统架构,并介绍了R16在固移融合、5G LAN、TSN等方向的核心网标准化进展;其次介绍了ITU IMT-2020核心网标准化进展,包括IMT-2020核心网架构,给出了B5G核心网演进思路分析,提出网络极简化、行业专网增强、网络智能化、uRLLC、mMTC、天地一体化等5G核心网演进方向,并提供了3GPP、ITU的B5G核心网标准化最新进展;最后提出B5G核心网技术方案研究和标准化应覆盖全部的主流技术方向,面向未来做好技术能力储备。     

Seamless service provision for multi heterogeneous access - seamless content delivery in the future mobile internet

The key enabling function for seamless mobility and service continuity among a variety of wireless access technologies is the handover. Handovers within the same radio system are addressed by the standardization bodies involved in the development of the corresponding technologies (e.g., 3GPP, 3GPP2, IEEE, DVB), while handovers between heterogeneous systems are managed by protocols developed by the IETF. However, the interoperability between radio access systems that is required to realize the vision of Beyond 3G calls for coordinated actions and integrated solutions combining individual strengths. This article reviews emerging protocols and architectures aiming to support intersystem handovers between nextgeneration wireless systems and presents an optimized handover framework built around the functionality introduced by the IEEE 802.21 standard. Mapping of this framework to the entities of the 3GPP evolved system architecture is discussed and handover procedures involving key entities of this architecture are presented.     

A Survey on Media Independent Handover (MIH) and IP Multimedia Subsystem (IMS) in Heterogeneous Wireless Networks

One challenge of wireless networks integration is to provide ubiquitous wireless access abilities and seamless handover for mobile communication devices between different types of technologies (3GPP and non-3GPP), such as Global System for Mobile Communication, Wireless Fidelity, Worldwide Interoperability for Microwave Access, Universal Mobile Telecommunications System and Long Term Evolution. This challenge is critical as mobile users are becoming increasingly demanding for services regardless of the technological complexities associated with them. To fulfil these requirements for seamless vertical handover (VHO) two main interworking frameworks have been proposed by IEEE Group and 3GPP for integration between the aforementioned technologies; namely, Media Independent Handover IEEE 802.21 and IP Multimedia Subsystem, where each of them requires mobility management protocol to complement its work, such as Mobile IP and Session Initiation Protocol, respectively. Various VHO approaches have been proposed in the literature based on these frameworks. In this paper, we survey the VHO approaches proposed in the literature and classify them into four categories based on these frameworks for which we present their objectives and performances issues.     

基于公钥算法改进型AKA协议安全性分析

3G系统安全框架采用了3GPP组织建议的AKA协议机制,并对无线链路上传输的数据进行加密保护,对传送的信令消息进行完整性保护。比2G系统在无线空中接口的安全性上有了很大的提升。但是,自从AKA协议提出后,国外许多学者就对该协议进行了研究,提出了该协议存在的许多安全问题,同时给出了许多改进AKA的建议。采用一种协议元素机密性推导方法分析了3GPPAKA和改进型AKA的安全性,提出了改进型AKA存在的安全薄弱点,并提出了改进协议的方法。