中国移动试推TD无线座机业务

电信运营商全业务竞争大战已经悄然打响。据悉，广东移动近日已经在广州和深圳悄然推出TD无线座机业务，普通用户可通过预存话费0元购机，预存话费优惠方案分为三个档次，从290元到650元。不过，该业务不可以漫游和发放短信。     

中国移动TD无线座机5月在38座城市全线推出

据相关人士透露，中国移动的TD无线座机业务将于近期全线推出。据悉，上海已经于日前进行了TD无线座机的试商用招标，共有3000余部TD无线座机产品中标。除了上海之外，广东、河北、福建、安徽、重庆、江西也已经开始在进行TD无线座机业务的试商用，预计5月份会在38座TD城市全线推出。     

TD无线座机之意仍在“移动”

在移动对固话替代趋势日益加剧的今天，中国移动却出人意料地推出了所谓的“固话业务——”TD无线座机。从表面上看，中国移动推出TD无线座机业务的意图似乎在于弥补其固话短板，为全面进军家庭用户和政企用户市场提前布局。但面对中国联通和中国电信在北方和南方固网市场的绝对垄断优势，TD无线座机要想在固话市场的夹缝中生存，绝非易事，不是仅仅依靠价格优势就能行的。从全球范围来看，固话用户不断萎缩已是大势所趋，TD无线座机潜在的固话市场空间十分有限。     

中国移动TD无线固话借势进攻企业市场

日前,多家TD终端厂商透露,中国移动TD无线办公座机研发资金招标巳启动,中国移动将加大对这种新型TD终端的研发资助。根据参与招标的内部人士透露,2010年中国移动将向集团客户大力推广TD无线座机业务。     

无线座机以6分钱／分钟资费抢市

记者17日从广州移动“优势升级引领3G”中国移动3G分享之旅活动上获悉,该公司针对家庭用户的TD—SCDMA业务无线座机已经推出。无线座机话费低至6分钱／分钟,迁新居不用报装,不用换号。另外,中国移动G3上网本、G3上网卡、G3手机等终端以及百合、飞信、邮箱等业务一并亮相。     

广东移动TD无线座机6分，分钟比小灵通便宜30％

记者获悉，最快下月初，采用TD的188号段、无月租、超低资费，还能实现2G和3G切换的TD、GSM双模的TD无线座机就要在广东推上市场．毫无疑问，这种低资费TD无线座机业务一旦成熟，将对原有通信市场格局造成重大冲击．     

银行系统WLAN部署方案

本文对银行系统WLAN部署方案进行了深入研究,根据银行系统营业网点场景和业务特点,结合业务模型和计算公式,分析了该场景下的无线覆盖、业务承载、业务安全、认证及运营等方案,旨在指导银行系统WLAN部署实际工程规划和建设.     

来电显示技术在无绳电话机上的实现

来电显示 ,是近年来电信部门推出的一种新的业务 :显示主叫方的电话号码和呼叫时间等信息。无绳电话机由座机和无线手机组成 ,无线手机可以在一定范围内任意移动。文章介绍如何在无绳电话机的无线手机上实现来电显示功能     

中移动TD无线固话研发基金招标开始

近日,多家TD终端厂商透露,已开始递交中国移动TD办公无线座机研发基金投标书,将争取中国移动对这种新型TD终端的研发资助,而这也预示着明年中国移动将向集团客户大力推广TD无线固话业务。     

基于实时业务挤占的OFDMA系统的无线资源分配方案

为了在实时业务和非实时业务共享无线资源的场景中增加系统吞吐量,该文提出了一种基于实时业务挤占的无线资源分配方法,该方案首先实施统一调度,然后进行实时业务挤占过程。在保证对实时业务服务的情况下,实时业务挤占的无线资源分配方案提高了多用户分集效果,增加了系统的吞吐量。理论和仿真分析表明,与已有的传统的实时业务和非实时业务共享无线资源的调度方案相比,该方案能够提供更高的系统吞吐量和频谱效率。在实际应用中,该方案具有一定的可行性和可操作性。     

Mobility,wireless and QoS

The proliferation of wireless local area networks has opened doors to numerous service opportunities. However, they tend to be limited to delay-tolerant applications. We envisage an environment where a single device is used for all types of communication and roaming freely between different wireless and wired technologies and network operators. To achieve this will require quality of service (QoS) handled appropriately. Within the IP community, QoS has generally been considered end-to-end over the fixed network. Wireless networks and mobile users add a new set of problems, which have only seen highly specialised solutions within the 2G/3G mobile telephone communities. This paper examines these problems and proposes a solution whereby QoS is dealt with by the end terminals through adaptive applications and end-to-end congestion control. This does not require explicit knowledge of the type of network, and does not need expensive whole network upgrades. We believe that this approach can improve the experience of users of current wireless LAN networks, and we are currently verifying and exploring our ideas on a WLAN test bed.     

A New Privacy Aware Payment Scheme for Wireless Charging of Electric Vehicles

Electric vehicles (EVs) can be considered as a revolution in the combustion industry with significant improvement in fuel utilization and decrease in pollution compared to combustion engines. However, by decreasing the size of the battery to reduce the cost, the frequency of charging EVs in a day increases. Therefore, to reduce the downtime required for charging EVs, wireless charging on the move can be an effective solution. In such a situation, paying for wireless charging on the move is an important issue. However, it can endanger the location privacy of users, since the EVs need to charge frequently in a day. In this paper, we first explain different methods of payment and problems with such payment methods in the case of wireless charging on the move. Then, we propose an efficient payment method based on ‘tokens’ for wireless charging on the move, which minimizes the communications between service providers and users during the charging process. The proposed scheme prevents users and service providers from cheating, and it is robust to support different values for the price. Finally, we compare it with other payment methods that have been proposed for plug-in electric vehicles.     

手机支付安全研究

针对手机支付安全问题,通过介绍手机的现场支付和远场支付业务,分析了手机终端、无线网络、支付平台所面临的安全威胁,提出了解决手机支付安全问题的安全框架。该安全框架通过综合应用密码技术、访问控制、安全协议、安全审计等4种安全技术手段和手机终端安全管理策略、通信传输安全管理策略、支付平台安全管理策略等3种安全管理策略为保障手机支付的安全提供了一种解决方案。     

RMS广域无线接入系统及其应用

利用成熟的RMS广域无线接入技术和现有的市话网络,使无线市话成为中国电信在通信领域的一个新的业务增长点,并且为偏远地区的用户提供一种更经济有效的通信解决方案。     

An efficient transport service for slow wireless telephone links

Modern digital cellular telephones and portable computers have created a new platform for distributed information processing. However, the characteristics of wireless telephone links are different from those of wireline links. With standard TCP/IP protocols, this can lead to severe performance problems; some are related to the control of the wireless link, some to the cooperation of the wireless link and the fixed network. One possible solution is to split the end-to-end communication path into two parts, and to establish a separate control for each part. The Mowgli communication architecture is a sophisticated elaboration of this basic idea covering several data communication layers. One of its main components is the Mowgli data channel service (MDCS), which transparently replaces the standard TCP/IP core protocols over the slow wireless link. We discuss how the Mowgli approach, using the MDCS, alleviates the problems encountered with TCP/IP protocols over slow wireless links. The results of our performance tests indicate the merits of the Mowgli approach. The transfer times and the response times become more stable, transfer times for multiple parallel bidirectional transfers are substantially reduced, and response times in interactive work can be kept at a low and predictable level, even when there is other traffic on the wireless link     

GMH2000系统和无线本地环路

休斯网络系统公司（ＨＮＳ）的ＧＭＨ２０００固定无线系统是一个基于Ｅ－ＴＤＭＡ的系统，它为公用电话业务提供了最有效的无线本地环路的解决方案。     

Service configuration and traffic distribution in composite radio environments

This paper adopts the assumption that cellular, broadband fixed wireless access (BFWA), wireless local area networks (WLAN), and digital video broadcasting (DVB) systems can be co-operating components of a composite-radio infrastructure. It is believed that through the composite radio concept, operators will be enabled to offer efficient, in terms of cost and QoS, wireless access to broadband IP-based services. The exploitation of this infrastructure calls for the application of computational intelligence (CI) technologies for the development of appropriate, sophisticated service and network resource management functionality. In this context, this paper identifies and addresses the important problem of service configuration and distribution in a composite radio environment (SCD-CRE). The problem's objective is to determine the best way to accommodate a demand volume, with which the composite radio infrastructure is faced. The pro finds the QoS levels that can be offered, and the networks that can support the demand at the selected QoS levels. The paper includes a first approach to the definition, mathematical formulation, and solution of a version of the SCD-CRE problem. Results indicating some of the capabilities of the SCD-CRE are also presented. Further application fields for CI technologies are indicated, in the area of the necessary reconfiguration of the managed, radio and fixed, network segments.     

An economic analysis of the US wireless telephone industry: responses to new technologies

The wireless telephone industry has seen dramatic changes. In the United States, for example, cellular demand continues to increase with high annual growth rates. In order to help meet this demand and to promote competition in the duopolistic wireless telephone industry, the Federal Communications Commission (FCC) supplemented the existing cellular industry capacity by auctioning spectrum for personal communications service (PCS). This paper analyzed the changing wireless telephone industry in terms of the emergence of new PCS providers. More specifically, this paper focused on the potential economic impacts of PCS providers on the traditional market structure of the wireless telephone industry by using industrial organization (IO) model and the concept of strategic groups. Because there are key strategic dimensions for grouping, the notions of strategic groups and mobility barriers seem to work well in the wireless telephone industry. Also, it is found that market concentration and conglomeration are more prominent than vertical integration in this fast growing, segmented and competitive industry.     

移动环境公平支付协议的设计与分析研究

结合固定网络中的支付协议并充分考虑移动装置和无线网络的特点,提出了一种移动环境公平支付协议。利用模型检验工具对协议进行分析并将该协议与其他支付协议进行比较,分析和比较结果表明,该协议具有公平、保密、高效等特点,适用于移动环境。     

移动WiMAX无线技术研究

移动WiMAX作为移动和固定宽带网络融合的宽带无线解决方案,具有宽频无线接入技术和灵活的网络结构,在宽带移动网络的演进过程中必将发挥重要的作用。研究了移动WiMAX采用的无线技术,介绍了波束形成、空时编码和空间复用技术,分析了具有自适应MIMO转换技术的自适应智能天线系统,为了保证边缘用户的连接质量,引入了有别于传统频率复用技术的部分频率复用技术,最后简单介绍了移动WiMAX支持的多播和广播业务。