Internet寻呼业务

随着Ｉｎｔｅｒｎｅｔ在全世界范围内普及，寻呼业务与Ｉｎｔｅｒｎｅｔ综合必将给寻呼业带来新的机遇。文章从Ｉｎｔｅｒｎｅｔ寻呼的网络配置情况出发，详细介绍了两者结合所带来的两种主要业务－万维网呼呼业务和电子邮件寻呼业务所需的技术条件，使用方法，适用场合等方面，最后，结合国内寻呼市场的特点，深入了分析两种业务在我国的应用前景供参考。     

双向寻呼——寻呼市场的新契机

近年来,中国的无线电寻呼市场发展异常迅猛,但面临着移动电话手机带来的挑战和威胁。双向寻呼的诞生为寻呼服务注入了新的活力,它可实现自动漫游登记、确保消息送达并具有回发消息的功能。它与Ｉｎｔｅｒｎｅｔ连接,能为用户提供别开生面的网络信息服务。     

国际寻呼系统简介

国际寻呼系统简介＠曾晓延国际寻呼系统简介曾晓延无线电寻呼是一种普及型的大众化的移动通信方式。目前寻呼所能提供的服务品种已有音响寻呼、数字寻呼、文字寻呼、语音寻呼、双向寻呼、带寻呼提示的语音信箱、传真信箱、电子信箱、用户终端入网、Ｉｎｔｅｒｎｅｔ上网寻呼等众...     

基于Internet网的无线寻呼系统

本文诣在将迅猛发展的Ｉｎｔｅｒｎｅｔ网络技术与无线寻呼系统有机地结合在一起，实现Ｉｎｔｅｒｎｅｔ网络无线寻呼。它融合了两大通信媒体的优点，为用户提供了更加灵活、便捷、廉价的服务。     

寻呼与Internet的结合

本文阐述了寻呼与Ｉｎｔｅｒｎｅｔ结合的意义，并对两者结合带来的增值业务进行了介绍，最后，提出了若干建议。     

BP机Internet综合信息寻呼系统

ＢＰ机Ｉｎｔｅｒｎｅｔ综合信息寻呼是在中国公众多媒体通信多现有平台上,将邮电的网络优势与各方信息源优势的结合,建立的一个为ＢＰ机用户提供各种Ｉｎｔｅｒｎｅｔ综合信息寻呼服务的系统。本文从系统结构,系统特点,业务功能,效益分析等几方面比较详细地介绍了该系统。     

网上寻呼设计与实现

从一个工程设计的角度出发,描述了设计和实现在寻呼系统中的网上寻呼系统,该系统能和现有的寻呼系统相配接,实现网页信息到寻呼机上的信息传递,电子邮件信息到寻呼机上的传递,以及寻呼信息转化为电子邮件信息三大功能。该系统各个功能独立分开,分别和寻呼系统无缝连接,网页寻呼功能采用CGI程序,用来实现网页寻呼的功能;邮件寻呼（包括寻呼信息到电子邮件和电子邮件到寻呼信息的转化）采用比较成熟的Internet网络邮件协议SMTP和POP3。     

无线寻呼通信的发展

２０世纪９０年代以来,移动通信业务在中国发展极为迅速,作为移运通信主流之一的无线寻呼,也在高速发展之中,近几年每年都在以１００万以上用户数量增加,根据信息产业部主管行业部门统计,截止到１９９８年９月底我国有寻呼经营单位２ ０１３个,用户总数６ ５１７万,其中从中国电信剥离出的国信寻呼为４ ０８４万,中国联通２００多万,其他为社会寻呼台的用户。预计１９９９年全国可能新增用户１２００至１４００万用户。因此有些部门和专家预测,到２０００年底我国的寻呼用户会超过８ ０００万,我国的寻呼通信市场潜力很大。 一…     

无线寻呼“127”开通过程中遇到的问题及解决方法

无线寻呼以其速度快,质量高,造价低,携带方便倍受人们青睐。青岛地区自从1986年从日本NEC公司引进设备并开通无线寻呼业务,虽已具备为三万数字寻呼服务的软件能力,但硬件配套仅开通一个发射频点,只能满足两万用户的需要。为满足青岛地区(包括五个县级市和一个开发区)的无线寻呼网,我局决定今年初从加拿大建利尔公司引进20万无线寻呼系统,工程竣工后可容纳10万BP机用户,其中有5万用户可同时兼有话音信箱,该系统汉字、数字兼容,人工、自动兼容,开通     

E—Mail寻呼业务：实现微机移动通信

随着Internet应用的普及，电子邮件E－Mail越来越成为人们重要的通信方式。但目前人们还没有可随身轻松携带的网络接收终端，若要在第一时间知道收到E－Mail及其内容，那只有整天坐在电脑旁守候信息，这自然给人们的生活带来诸多不便。现在，一种寻呼新业务—“E－Mail寻呼”服务解决了这一难题：当E－Mail送到用户的电子信箱时，其用户机就会立即提醒机主，你收到E－Mail了，如果机主拥有寻呼机，便可直接在BP机上阅读E－Mail内容，从而实现了微机的“移动通信”。自美国TeleSKY寻呼公司推出E—Mail寻呼以来，全球各大寻呼公司纷…     

User Independent Paging Scheme for Mobile IP

Multi-step paging has been widely proposed in personal communications services (PCS) systems to reduce the signaling overheads. Similar ideas can be applied to Mobile IP to provide IP paging services. However, current proposed multi-step paging schemes are user dependent under which the partition of paging areas and the selection of paging sequence are different for each user. The performance of a user dependent paging scheme for individual users may be affected by many factors. It is often difficult to achieve perfect performance for each user. In addition, when multiple users are paged at the same time, user dependent paging schemes may consume significant system resources. This paper introduces a user independent paging scheme where the paging criterion is not based on individual user information. The goal of user independent paging is to provide satisfactory overall performance of the whole system, when personalized optimal performance for each user is hard to obtain. The user independent paging scheme is proposed for IP mobility for its easy implementation and convenient combination with paging request aggregation. The paging criterion adopted is the mobility rate of each subnet determined by the aggregated movements of all mobile users. In order to implement the proposed scheme, a concept of “semi-idle state” is introduced and the detailed solution for obtaining mobility rate is presented. Analytical results show that when paging one user at a time, the performance of the proposed user independent paging scheme is comparable to that of the paging schemes based on perfect knowledge of user movement statistics. When paging multiple users simultaneously and when the knowledge on individual user behavior is not perfectly accurate, the proposed scheme has remarkable advantages in terms of reducing the overall paging cost. Jiang Xie received her B.E. degree from Tsinghua University, Beijing, China, in 1997, M.Phil. degree from Hong Kong University of Science and Technology in 1999, and M.S. and Ph.D. degrees from Georgia Institute of Technology in 2002 and 2004, respectively, all in electrical engineering. She is currently an assistant professor with the Department of Electrical and Computer Engineering at the University of North Carolina-Charlotte. Her current research interests include resource and mobility management of wireless networks,QoS provisioning, and next-generation Internet. She is a member of IEEE and ACM.     

P-MIP: Paging Extensions for Mobile IP

As the number of Mobile IP users grows, so will the signalling overhead associated with Internet mobility management in the core IP network. This presents a significant challenge to Mobile IP as the number of mobile devices scale-up. In cellular networks, registration and paging techniques are used to minimize the signalling overhead and optimize the mobility management performance. Currently, Mobile IP supports registration but not paging. In this paper, we argue that Mobile IP should be extended to support paging to improve the scalability of the protocol to handle large populations of mobile devices. To address this, we introduce P-MIP, a set of simple paging extensions for Mobile IP, and discuss the construction of paging areas, movement detection, registration, paging and data handling. We present analysis and simulation results for Mobile IP with and without paging extensions, and show that P-MIP can scale well supporting large numbers of mobile devices with reduced signalling under a wide variety of system conditions.     

Effective Paging Schemes with Delay Bounds as QoS Constraints in Wireless Systems

In this paper new paging schemes are presented for locating mobile users in wireless networks. Paging costs and delay bounds are considered since paging costs are associated with bandwidth utilization and delay bounds influence call setup time. In general, location tracking schemes require intensive computation to search for a mobile terminal in current PCS networks. To reduce the paging costs, three new paging schemes, reverse, semi-reverse and uniform, are introduced to provide a simple way of partitioning the service areas and decrease the paging costs based on each mobile terminal's location probability distribution. Numerical results demonstrate that our approaches significantly reduce the paging costs for various probability distributions such as uniform, truncated discrete Gaussian, and irregular distributions.     

关于TMSI寻呼与IMSI寻呼性能分析

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。     

TD-LTE系统TA及TAlist规划原则

本文首先介绍了TD-LTE系统位置区的管理机制,其次从TD-LTE系统能力以及目前TD-LTE设备性能等角度,分析了TD-LTE网络的寻呼机制和寻呼容量,最后通过预测LTE小区的用户数目以及单用户寻呼模型,给出了TA/TA list的规划原则和建议。     

中国无线寻呼业务的发展及市场展望

本文通过分析近几年来我国无线寻呼业务的发展状况及趋势，从技术、业务、经营模式等多方面了我国无线寻呼市场具有巨大的发展潜力，并对未来我国无线寻呼业务及市场作了展望 。     

日本统一的高速无线寻呼标准—FLEX—TD

随着无线寻呼个人应用的发展，寻呼机正从简单的寻呼工具变为信息通信工具，传输的信息量也随之迅速增大。为了适应系统大容量化以及钭来服务多样化的要求，日本制定了日本统一的高速无线寻呼系统的标准。本文介绍了日本无线寻呼业务的现状和ＦＬＥＸ－ＴＤ的技术特性。     

Optimal Sequential Paging in Cellular Wireless Networks

In a high-capacity cellular network with limited spectral resources, it is desirable to minimize the radio bandwidth costs associated with paging when locating mobile users. Sequential paging, in which cells in the coverage area are partitioned into groups and paged in a non-increasing order of user location probabilities, permits a reduction in the average radio costs of paging at the expense of greater delay in locating the users. We present a polynomial time algorithm for minimizing paging cost under the average delay constraint, a problem that has previously been considered intractable. We show the conditions under which cluster paging, a simple heuristic technique proposed for use with dynamic location update schemes, is optimal. We also present analytical results on the average delay and paging cost obtained with sequential paging, including tight bounds.     

IP Paging Service for Mobile Hosts

In wireless networks, mobile hosts must update the network with their current location in order to get packets delivered. Paging facilitates efficient power management at the mobile host by allowing the host to update the network less frequently at the cost of providing the network with only approximate location information. The network determines the exact location of a mobile host through paging before delivering packets destined to the mobile host. In this paper, we propose the concept of paging as an IP service. IP paging enables a common infrastructure and protocol to support the different wireless interfaces such as CDMA, GPRS, wireless LAN, avoiding the duplication of several application layer paging implementations and the inter-operability issues that exist today. We present the design, implementation, and detailed qualitative and quantitative evaluation, using measurements and simulation, of three IP-based paging protocols for mobile hosts.