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PHS系统,是近年来发展迅速的无线通信系统之一。LCS无线定位业务作为PHS网络最重要的业务之一,对PHS系统的无线定位技术提出了要求。本文详细介绍了PHS基于微蜂窝网络的无线定位技术,并对PHS无线定位技术的发展进行了展望。 相似文献
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本文分析了PHS系统的无线信道对电波传输的各种影响,提出了PHS系统中所采用的改善系统性能的天线技术,并展望了今后PHS系统天线技术的发展。 相似文献
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无线市话在国内得到了迅速发展,PHS是无线市话接入技术中的一种,介绍了PHS系统的相关技术参数、组网方法和系统特点,并提出了网络优化的侧重点,最后对PHS的市场定位和营销策略提出了一些看法和意见。 相似文献
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文章分析了PHS对WCDMA系统干扰的主要原因,提出了不同系统间干扰测试方法的差异。通过仿真,分析了PHS干扰对WCDMA影响和系统共存需要的隔离,并且通过实际的测试对仿真结果进行了对比和分析。 相似文献
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PHS系统空中接口采用RCR STD 28协议,使用独立的交换设备或V5接口与其他交换机对接。PHS网络有别于传统的PSTN网络,不仅网络结构不同,而且用于衡量网络性能的许多参数也不同。下面主要以UTStarcom公司的PAS系统为例对PHS系统的网络分析作一个基本的探讨,其他类别的PHS系统网络性能分析也可参照此文进行。 相似文献
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随着移动通信技术的迅猛发展,个人手持移动电话不断的普及。介绍了个人手持电话系统(PHS)的发展过程,对其最新技术进行介绍。并在对PHS数据通信业务的发展进行深入分析和探讨的基础上,展望了PHS数据通信技术的发展应用前景。 相似文献
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目前,中国电信和中国网通运营的PHS系统主要使用1900-1920MHz频段,与WCDMA规划的FDD频段:1920~1980MHz/2110-2170MHz的上行频段1920~1980MHz相邻(见图1),因此PHS系统与WCDMA系统之间可能存在干扰。在以后的商用网络中,WCDMA系统与PHS系统共存是一个必然的趋势,因此必须解决PHS系统与WCDMA系统之间的干扰问题。 相似文献
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本文结合3GPP、STD-28协议以及路测结果对WCDMA与PHS系统共存时无线环境干扰进行了理论计算分析,并利用PHS基站、手机杂散测试结果得出规避干扰需要的理论隔离度,就干扰判定方法以及滤波器安装准则进行了介绍. 相似文献
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Takanashi Hitoshi Tanaka Toshiaki Oono Tomoyoshi Matsuki Hideo Hattori Takeshi 《Wireless Personal Communications》1999,9(3):255-270
The Personal Handy-phone System (PHS), developed as a PCS, has been very widely accepted. This system offers many benefits as the infrastructure of the mobile data communication services that are expected to be available soon with the popularity of nomadic computing. Data communication systems based on PHS and some applications are proposed in this paper. One of the key technologies, an error control scheme, is also introduced. Three kinds of possible system configurations are discussed as a data communication platform for PHS. One of them has an ARQ function which corrects all errors that occur in the propagation path. Conventional application software on nomadic computers can be used in the mobile environment because this ARQ function is installed as a lower layer protocol. The introduced system connects all mobile computers to all servers that are on the networks which include ISDN, the conventional analog PSTN, cellular networks and PHS networks. 相似文献
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In this paper, we propose a novel electromagnetically coupled microstrip antenna with a rotatable patch to overcome the problems associated with the conventional whip antenna for the personal handy-phone system (PHS). The structure of the newly developed antenna installed in actual PHS units is described. Its fundamental characteristics such as radiation pattern, bandwidth, and gain are shown. The performance of the antenna in actual propagation environments is also clarified. It is shown that this novel antenna is superior to the conventional whip antenna and achieves efficient performance in commercial PHS service 相似文献
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介绍了PHS网呼入成功率和短消息流程,依据短消息模型和性能统计结果分析了群发短信对PHS网呼入成功率的影响,并建议选择合理的时间进行短消息群发以减少对网络负荷的影响。 相似文献
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Suzuki S. Shibata T. Yoshimi M. 《Selected Areas in Communications, IEEE Journal on》1997,15(8):1597-1607
The network for supporting the global personal communication is called the global mobility network (GLOMONET), where global mobility is guaranteed by coordination between intelligent networks (INs). This paper describes the implementation of a roaming signaling protocol for the personal handy-phone system (PHS) GLOMONET, clarifying the concepts of the PHS architecture regarding the GLOMONET. The PHS is a more economical personal communication system than existing cellular systems, by introducing the concept that the PHS service is provided by the most effective use of the existing ISDN and IN functions, where the majority of network functions to provide ISDN services are commonly used for functions for PHS service provision. The PHS mobility function realized by the IN guarantees flexible and effective roaming service provision for the globalization of future personal communication. The proposed PHS signaling protocol architecture is based on the intelligent network capability set 2 (IN CS2) defined by the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) Study Group 11 and a visitor location register (VLR) database scheme with efficient signal transfer in the GLOMONET. The PHS specific roaming signaling protocol is defined by the service-independent IN application protocol (INAP). The proposed PHS concepts and roaming signaling protocol were reflected to the national telecommunications standards in the Telecommunication Technical Committee (TTC) and standards in the PHS-memorandum of understanding (MoU) 相似文献
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介绍了PHS系统结构以及相关技术特点;在此基础上,对PHS手机终端,基站信号处理技术和核心网络的发展与演进等方面进行了介绍与探讨。 相似文献
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介绍了煤矿井下小灵通无线通讯系统网络结构和空中接口原理。针对小灵通在煤矿井下使用中存在掉话、切换等问题,结合公网小灵通系统优化经验,提出适合煤矿井下环境的优化方法,这些优化方法从根芩上解决了影响现场使用效果的问题,可综合运用于煤矿井下小灵通系统优化过程。 相似文献
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随着PHS无线市话业务的普及,继短消息服务等附加业务后,PHS无线市话定位业务将成为无线数据增值业务的一个新亮点。这种定位系统对于需要紧急服务的公安、金融、交通等行业用户有着广泛的应用前景。本文简述了无线市话小灵通定位系统业务的发展概况和特点,对其管理系统构成及业务实现流程进行了探讨。 相似文献