共查询到19条相似文献,搜索用时 109 毫秒
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GSM网上的位置业务是一项非常有前景的无线增值业务。首先介绍了位置业务的应用范围,然后结合GSM网络现状,列举了为支持位置业务,可在GSM网中采用的几种定位技术,指出了GSM网络为满足位置业务所需的演进结构,最后对GSM支持位置业务的方案提出了建议。 相似文献
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智能反射面(IRS/RIS)应用于实际无线通信系统时,如何优选布放位置及面板取向,是提升技术实效所面临的主要问题之一。RIS布放的数学规划问题,不仅有优化目标的设计,还要考虑通信环境的建筑物分布和可选部署面的有效散射截面。相比于室外较为开放的空间,RIS的室内部署存在更多限制性条件。针对室内既有墙面的RIS布放,该文设计了多终端接入选址规划模型和等价问题。为约化其非线性计算,通过单终端退化分析,给出目标函数的卡西尼卵形线分布特征,证明RIS布放范围限于各终端及基站在部署面投影的重叠区,提出基于对半搜索法的高效启发式算法。数值仿真了2种复杂室内结构的多终端接入场景,结果表明所提算法不仅有显著加速效益,还可扩展用于多RIS网络规划。 相似文献
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北美位置业务的兴起,源于!"##强制令的颁布;欧洲位置业务的兴起则是市场拉动,由基于位置的增值业务所驱使。位置业务所面临的问题有:要制定全球统一的技术标准来保证设备之间的互操作性,同时还要制定有关责任和隐私权的法律条文。位置业务将使无线内容行业进一步靠近大众市场,从而最终盈利。 相似文献
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详细探讨了第三代移动通信系统UMTS网络位置业务的定位技术,从多角度比较了各种技术的优劣.并就如何应用这些技术进行了详细的阐述。 相似文献
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王雨森 《中国电子科学研究院学报》2006,1(2):206-209
移动位置业务作为一种移动增值业务,随着3G技术的发展越来越受到关注。叙述了移动位置业务中采用的主要定位技术并进行综合比较,通过描述该业务的网络架构和基本信令流程,说明该业务在3G网络中的实现方案,展望移动位置业务的发展前景,并指出影响业务发展的关键因素。 相似文献
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本文从移动位置业务的现状分析入手,阐述了利用在智能手机平台上预置终端GIS(地理信息系统)引擎和城市地图来实现多种位置业务的方案,旨在为解决目前位置业务的瓶颈提供一种可行的方案,促进移动位置业务的发展. 相似文献
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PHS定位技术及业务应用研究 总被引:1,自引:0,他引:1
介绍了移动定位技术的种类,讨论了适合PHS网的几种定位业务应用,探讨了PHS定位技术选择、业务开发与价值链建设及用户隐私权保护等问题。 相似文献
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《Journal of Location Based Services》2013,7(1):53-65
The current trend in location-based services (LBSs) research is to focus on the development and deployment of LBSs. This research examines the different uses of LBSs based on a virtual environment. It is argued that using the real world method of developing and deploying LBS restricts the types of uses being developed and that an alternative approach might yield insight into what types of uses are possible and how it might change the thinking of LBSs developers. This research surveyed the Second Life metaverse to identify and categorise the types of LBS used and deployed in the digital world. The results of the survey found that many of the LBSs in SL provided intelligence to the avatar so that they could perform an action which they could not do without the LBS. It is clear that the topic of navigation is biased based on the digital nature of the SL metaverse and its use of the teleportation concept. But the results show that LBSs are ubiquitous throughout metaverse and the types of services go beyond those found in the real world. 相似文献
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《Journal of Location Based Services》2013,7(3):165-187
The ongoing progression of mobile communication devices, in particular with respect to positioning capabilities, has enabled the development of a new generation of location-based services (LBS). One of the most important aspects of current research on LBS is personalisation but it has been treated primarily for individual users. This article presents a first step towards personalised LBS that support user groups in their everyday decision-making, such as deciding where and when to meet for a common activity. The principles behind location-based group decision processes are outlined and a formal model for supporting such processes using methods of multi-criteria decision-making, time geography and similarity measurement is defined. This model is then implemented in the LBS prototype mediatrix. The prototype is used for simulating a location-based decision process aimed at finding an optimal restaurant for a user group in a city. 相似文献
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《Journal of Location Based Services》2013,7(4):250-269
The rapid growth of mobile phone value-added services has increasingly attracted marketing attention. The real-time location-based advertising service (RTLBAS) being developed by VIETMAP, a leading mapping company in Vietnam, employs positioning technology to locate a user and provide advertising information. An empirical case study in Ho Chi Minh City, Vietnam, was conducted to examine the acceptance of RTLBAS. Data were collected by 12 VIETMAP salespersons who conducted a questionnaire-based interview of the subjects. The sample consisted of 315 respondents. Data analysis revealed three important findings. First, perceived compatibility is the main concern, and will make mobile phone users more likely to use RTLBAS. Customers become increasingly function-sensitive and function-compatible as the number of service types increases. Second, mobile phone users are uncertain about adopting VIETMAP's RTLBAS, preferring to try it first even if they think it is useful. Finally, a privacy policy should be developed as a concern of the social relevance of RTLBAS development. Managerial implications were also addressed. 相似文献
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主要介绍了3G业务中的多媒体广播和组播业务(MBMS),包括MBMS的网络架构、业务流程、网络接口、发展优势和市场应用前景,以及上海贝尔在MBMS方面的发展。 相似文献
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3G时代位置服务技术研究 总被引:1,自引:1,他引:1
由于具备动态3D地图、POI实时更新、实时交通导航等2G时代不具备的特点,3G时代的位置服务必将获得广阔的应用前景。首先介绍了当前三大类主流定位技术——基于网络的定位技术、基于移动终端的定位技术和混合定位技术,并简要分析了COO、AFLT、AGPS、GPSOne等技术的优缺点;然后按被定位单元、位置服务核心子系统、位置服务业务子系统、监控和管理端四个子系统讲解了国内运营商所采纳的主流位置服务平台的体系结构,描述了PDE、MPC、LCSClient等主要网元的功能,最后以一个移动台发起的定位过程为例说明了3G时代位置服务的实现过程。 相似文献
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移动位置服务应用发展研究 总被引:2,自引:0,他引:2
3G时代的到来为移动增值业务提供了广阔的发展空间,移动位置服务以其移动性、实用性、随时性和个性化的特点,成为最具发展潜力的移动增值业务之一。本文从国内外移动位置服务应用模式及发展历程出发,对位置服务的应用特点、产业发展趋势以及发展中的若干问题进行分析,给出针对国内电信运营商位置服务业务的发展建议。 相似文献
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本文讨论了东信北邮信息技术有限公司位置服务平台的系统总体结构设计、功能模块设计、进程拓扑图. 相似文献