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2007年上半年,全球移动通信市场仍显现蓬勃发展趋势。全球移动运营商继续加强3G市场特别是HSDPA的投资,欠发达地区正在成为全球移动市场的主要增长点。除了3G技术,移动运营商还积极进行WiMAX和WiFi的投资,日韩运营商还在积极探索超3G技术。3G市场仍然是全球移动运营市场的发展重点,3G新兴市场在2007年上半年表现突出,发展迅速。 相似文献
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Mobile WiMAX优势分析 总被引:1,自引:0,他引:1
Mobile WiMAX是对固定WiMAX的修订,增加了支持移动性的能力。完完全全成为一种移动通信技术。在当前几种3G技术体制纠缠不清,3G市场发展不明朗的今天,Mobile WiMAX能够得到如此关注是与其本身的技术优势和市场拓展策略分不开的。Mobile WiMAX优势Mobile WiMAX技术是在总结其它移动通信和计算机技术发展经验的基础上开发的。其物理层技术OFDMA和多天线技术是移动通信的发展方向。通过WiMAX论坛进行全球市场开发和推广,不遗余力地协调不同的技术体制,建立统一开放的技术标准,其结果将使Mobile WiMAX充分满足未来移动通信发展… 相似文献
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移动WiMAX技术与应用 总被引:1,自引:0,他引:1
随着固定WiMAX标准(16d)和移动WiMAX标准(16e)的提出,固定WiMAX的产品已经成熟,移动WiMAX的产品认证测试也即将开始,全球范围内WiMAX系统的试验和商用网络也逐渐展开。本文将就移动WiMAX的标准情况、运营商试验案例以及目前可能面临的问题做简要介绍与分析。 相似文献
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无线宽带技术:从多元竞争到多元融合 总被引:1,自引:0,他引:1
WiMAX与3G的竞合 对WiMAX来说,现阶段以及即将到来的2008年是一个非常重要的时期.2007年上半年,WiMAX的全球市场拓展步伐已经开始加速.虽然正式商用的网络数量,特别是基于移动WiMAX的商用网络在现阶段并不多见,但是关注WiMAX并参与其中的运营商数量正在不断增多,很多设备厂商在发展3G的同时涉足WiMAX产业.同时,部分区域3G/3.5G商用的推迟,也对WiMAX产生了正面的推动力量. 相似文献
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汪建 《无线电技术与信息》2006,(2):31-35
在2004年WiMAX提出具有移动特性的系统框架结构后,移动WiMAX被视为3G的强力竞争对手,许多人认为二者将在无线领域上演生死之战。而日前召开的2005全球WiMAX高峰会议给我们带来这样的信息:如果将WiMAX放到整个无线移动通信领域的发展中来把握其发展趋势,对于两种技术来说,并不存在绝对的非此即彼的关系,移动WiMAX和3G是可以互补共存并最终相互融合的。 相似文献
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一、中国香港移动通信市场概况 中国香港移动通信市场起步较早,目前移动用户普及率已达到133.4%,是全球移动通信技术发展较为成熟且竞争激烈的市场之一,共有5家移动服务提供商经营着6个2G蜂窝移动通信网络和4个3G移动网络. 相似文献
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本文对WiMAX的最新标准进展及技术热点进行了介绍.对移动WiMAX商用进展进行概述,并分析了移动WiMAX产业链发展趋势.总结了移动WiMAX的优势与挑战.并对其今后在中国发展的不确定性进行了分析,主要有三个方面:中国3G许可证未发,寻找移动WiMAX的可用频率比固定WiMAX更为困难;技术上的选择可能影响中国整个电信行业的发展。 相似文献
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Koon Hoo Teo Zhifeng Tao Jinyun Zhang 《Signal Processing Magazine, IEEE》2007,24(5):144-148
Mobile worldwide interoperability for microwave access (WiMAX) is a wireless standard that introduces orthogonal frequency division multiple access (OFDMA) and other key features to enable mobile broadband services at a vehicular speed of up to 120 km/h. WiMAX complements the and competes with wireless local area networks (WLANs) and the third generation (3G) wireless standards on coverage and data rate. More specifically, WiMAX supports a much larger coverage area than WLAN, does not require line of sight for a connection, and is significantly less costly compared to the current 3G cellular standards. Although the WiMAX standard supports both fixed and mobile broadband data services, the latter have a much larger market. Therefore, this article will briefly present the Mobile WiMAX standard, the technologies deployed for the air interface and the network, and the development of the standards to support mobile multihop relays in a WiMAX network. 相似文献
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Mobile WiMAX systems: performance and evolution 总被引:1,自引:0,他引:1
Fan Wang Ghosh A. Sankaran C. Fleming P. Hsieh F. Benes S. 《Communications Magazine, IEEE》2008,46(10):41-49
Mobile WiMAX was successfully adopted by ITU as one of the IMT-2000 technologies in November 2007. Since then mobile WiMAX (a.k.a. IP-OFDMA) has officially become a major global cellular wireless standard along with 3GPP UMTS/HSPA and 3GPP2 CDMA/ EVDO. Mobile WiMAX is an OFDM-based technology available for deployment today, and new WIMAX devices come to market at much reduced cost than that of current 3G solutions. Currently over 260 service providers are deploying fixed, portable and mobile WiMAX networks in 110 countries. This article provides an overview of the mobile WiMAX system and its performance under various configurations, channel conditions, and types of data traffic. Furthermore, the article provides an overview of mobile WiMAX evolution. 相似文献
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WiMAX安全机制分析与研究 总被引:1,自引:0,他引:1
WiMAX是近来中国乃至世界无线宽带市场的热点,作为一种新的无线接口标准,引起了业界人士的广泛关注,并且已经被国际电信联盟批准为3G标准的新成员。WiMAX安全问题自WiMAX出现以来引起业界的广泛关注,文章重点讨论了WiMAX的安全协议机制。 相似文献
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无线接入互联网和无线多媒体数据业务的市场需求推动了无线通信技术的快速发展,通信技术宽带化、IP化、移动化成为未来的发展趋势.其中具有代表性的技术就是:Wi-Fi和移动WiMAX技术.本文从市场、技术、运营的角度来分析移动WiMAX和Wi-Fi的定位,探讨二者融合的可行性并给出建议. 相似文献
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Seamless integration of mobile WiMAX in 3GPP networks 总被引:2,自引:0,他引:2
As the wireless industry makes its way to the next generation of mobile systems, it is important to engineer solutions that enable seamless integration of emerging 4G access technologies within the currently deployed and/or evolved 2G/3G infrastructures. In this article we address a specific case of such a seamless integration, that of mobile WiMAX in evolved 3GPP networks. In this context we investigate the architecture and the key procedures that enable this integration, and we also introduce a novel handover mechanism that enables seamless mobility between mobile WiMAX and legacy 3GPP access, such as UTRAN or GERAN. The core characteristic of this novel handover mechanism is that mobile terminals do not need to support simultaneous transmission on both WiMAX and 3GPP accesses; therefore, it mitigates the RF coexistence issues that exist otherwise and improves handover performance. In addition, we provide a brief overview of mobile WiMAX and the evolved 3GPP network technologies, and we set the appropriate background material before presenting our proposed handover mechanism. Our main conclusion is that integrating mobile WiMAX in evolved 3GPP networks is a compelling approach for providing wireless broadband services, and mobility across WiMAX and 3GPP access can become seamless and efficient with no need for mobile terminals to support simultaneous transmission on both types of access. 相似文献