共查询到19条相似文献,搜索用时 62 毫秒
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目前网络模式下,CS业务与PS业务都使用相同的公共控制信道(CCCH)来发送寻呼和信道的立即指派消息,在数据业务非常集中区域,就会出现由于PS业务的大量使用造成CCCH信道资源不足,导致CS寻呼拥塞,本文通过分析CCCH信道的结构和原理,引申出CS优先发送功能的实现机制,通过网络实验分析证明该功能对于解决CS寻呼拥塞起到重要作用。 相似文献
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减少长短信寻呼量研究 总被引:1,自引:0,他引:1
本文对手机在接收长短信的时候需要多次寻呼响应才能完成长短信接收的情况进行了深入的研究,提出了优化短信中心的MT流程的方案.该方案可以很好的解决长短信多次寻呼问题,能有效降低寻呼总量,既不影响用户感受,也不影响设备性能,是值得采用的低成本高回报优化方式. 相似文献
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随着移动用户的持续增长和手机新业务的不断推广,移动通信系统的寻呼负荷日益加重。以移动用户漫游被叫时的呼叫流程为例,分析IMSI寻呼和TMSI寻呼的原理,对比两种寻呼方式对网络性能影响,提出一种评估寻呼方式的量化计算方法。通过对寻呼容量较为紧张网元的试验证明,该方法可以科学指导寻呼方式的优化工作,提高移动通信网络的系统寻呼容量,改善移动通信系统寻呼性能。 相似文献
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文章介绍了利用电话语音卡,在人工寻呼系统上增加自动寻呼系统的方法及其实现,并给出了应用实例。使用结果表明,自动寻呼系统的开通,不仅提高了寻呼速度,而且使信息传递准确,因此方便了用户,提高了寻呼台的知名度。 相似文献
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Internet寻呼业务应用前景可观 总被引:1,自引:0,他引:1
随着Internet网络技术的发展,Internet用户和寻呼业务用户日益增多,Internet寻呼业务应运而生,Internet寻呼业务按使用方法可分为万维网寻呼和电子邮件寻呼两大类,目前提供电子邮件寻呼业务的公司较多。 相似文献
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高鹏 《电信工程技术与标准化》1997,(4)
分析单向寻呼技术在系统容量、频率利用率、业务可扩展及交互性等方面的局限性,阐述双向寻呼技术的原理及在技术上的改进并介绍一个典型的双向寻呼系统。 相似文献
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Ved P. Kafle Sangheon Pack Yanghee Choi Eiji Kamioka Shigeki Yamada 《Wireless Communications and Mobile Computing》2007,7(5):553-568
The advent of advanced mobile/wireless systems has been facilitating the battery‐powered mobile computing devices (nodes) to remain always connected to the internet. However, until now, the power‐drain rate of mobile nodes is very high in comparison with the available power of portable batteries. To reduce the energy consumption of mobile nodes, we present an integrated IP paging protocol (IIPP) by integrating the IP‐layer paging protocol based on Mobile IPv4 regional registration (MIPRR) with a power save mechanism. IIPP reduces the frequency of signaling messages between mobile nodes and networks. When not sending or receiving data for a certain time, mobile nodes enter power save mode (PSM), and consume very low power. We formulate analytical models and carry out simulations to evaluate the proposed IIPP. The results show that, compared to MIPRR, IIPP significantly reduces the average power consumption of the mobile node and signaling overheads in the network. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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The characteristics of TCP and UDP lead to different network transmission behaviours. TCP is responsive to network congestion whereas UDP is not. This paper proposes two mechanisms that operate at the source node to regulate TCP and UDP flows and provide a differential service for them. One is the congestion‐control mechanism, which uses congestion signal detected by TCP flows to regulate the flows at the source node. Another is the time‐slot mechanism, which assigns different number of time slots to flows to control their flow transmission. Based on the priority of each flow, different bandwidth proportions are allocated for each flow and differential services are provided. Simulation results show some insights of these two mechanisms. Moreover, we summarize the factors that may impact the performance of these two mechanisms. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
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Zohar Naor 《Wireless Communications and Mobile Computing》2005,5(7):733-748
The issue of providing a mobile virtual private network (MVPN) service by a cellular network is addressed in this study. The main focus of this study is on two aspects of MVPN handling: a multicast transmission, and location management of the MVPN members. Virtual private networks (VPNs) already exist in wired networks. The growing number of mobile users increases the demand for mobile services. It is expected that future wireless networks will have to provide wireless internet services, and in particular, to support MVPNs. In order to maintain an MVPN service offering, the system must support an efficient information delivery to the MVPN members. In order to achieve this goal, the physical locations of the MVPN members must be known to the system. In this study, we present methods to efficiently route and transmit information to the MVPN members, without affecting the quality of the personal service provided to each and every MVPN member. It is shown that the wireless MVPN bandwidth requirement is significantly less than the equivalent bandwidth required by a wired VPN. The offered bandwidth utilization is significantly better than the efficiency of IP‐based multicast transmission in the Internet, and the proposed IP‐based multicast transmission in cellular networks. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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针对目前我国无线电寻呼行业中普遍存在违反规定增大基站的发射功率,造成无线电通信系统之间产生严重的相互干扰的问题。提出了一种对基站发射功率进行快速监测和遥控的新方法,这种监测方法排除了地形和地物等因素的影响,同时也排除了无线电通信系统之间的相互干扰的影响,重点介绍了排除这些影响因素的方法和测量计算发射功率的方法。 相似文献
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未来的移动通信网络将采用以IMS为核心的统一网络架构,核心网电路域与IMS域的融合将是必然的趋势,业界提出了多种模式来实现核心网的融合,3GPP在R8版本推出的ICS模式是近来运营商较为关注的一种融合模式,本文将从架构特点、可实现的业务等角度对ICS融合模式进行分析探讨,对其在网中的应用提出建议。 相似文献
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CS6208是Myson Century公司推出的专门用于网络控制和传输的芯片,它基于8051体系结构硬件平台的支撑,使用Keil 51编译环境,处理速度与8051系列单片机相比有很大的提高,支持IEEE802.37线ENDEC接口以及TCP/IP、ARP、UDP等协议,并且集成有4周期的8051和一个以太网接口。由于它把TCP/IP协议栈函数已封装起来,因此,用户只需调用它的API函数即可完成操作。文章介绍了CS6208的原理、特点和引脚功能,给出了CS6208的一种典型应用设计电路。 相似文献
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压缩感知理论是近年来提出的一种基于信号稀疏性的新兴采样理论。与通常的数据采样定理不同,该理论提出可以用远远少于传统采样定理所需的采样点数或观测点数恢复出原信号或图像。本文主要阐述了压缩感知中信号的稀疏表示、测量矩阵的设计及信号的重构算法等基本理论,论述了该理论的广阔应用前景。 相似文献