寻呼信道负荷过高的问题研究

寻呼信道的高负荷已成为阻碍中国电信cDMA网络长远发展的因素之一,如何降低CDMA网络的寻呼信道负荷是中国电信网络优化的重要研究课题。文章主要研究了阿尔卡特朗讯CDMA网络中开销消息所产生的寻呼信道负荷,并以阿尔卡特朗讯业务区某大型城市为例,就如何降低寻呼信道负荷提出了几点建议。     

LTE网络下的寻呼消息及其监听算法

介绍了LTE网络下寻呼消息的用途以及用于承载寻呼消息的逻辑信道、传输信道和物理信道之间的映射关系,同时对其寻呼周期的非连续监听算法做了详细的分析。     

一种新型无线语音寻呼系统

该新型语音寻呼系统是根据我国国情和市场需求而研究开发的，适用于寻呼流动人员及向其单方向传送语音信息．其语音寻呼控制中心台应用先进的微机控制技术实现全自动有／无线转接，具有单呼、组呼、紧急全呼、电脑统计、管理等功能．语音寻呼机采用数字语音合成技术，可提供三条共计３０秒的语音信息存储及重放．系统具有信息容量大、传输方式简洁迅速，用户无需复机等优点，这在电话普及率较低的我国尤有特殊意义．该系统目前已通过鉴定，即将投入批量生产，具有良好的应用前景，可用于建立中小容量专用寻呼网及小容量公众网，为我国移动通信的发展提供一种新的尝试和探索．     

一种先进,实用的寻呼发射系统

本文详细介绍了电子部七所的寻呼发射系统的组成、性能、主要设备设计和应用，读者可以通过此系统的析，了解现有POCSAG码150／280MHz频段寻呼系统。     

一种新的无线寻呼编码器优化排队算法

本文提出一种新的基于最佳匹配理论无线寻呼编码器优化排队算法，该法采用向前预测μ步的方法寻找最优解，利用分支限界的原理，剪除不能找到最优解的分支，提高运算速度。     

一种高效率的POCSAG寻呼编码器

本文从POCSAG寻呼编码原理提出提高编码效率的方法，讲述ET－1840高效寻呼编码器的原理及实现。     

3种无线寻呼系统的由来

无线寻呼系统,按ＣＣＩＲ的定义是一种传送呼叫信号的单向个人选呼系统,它没有语音,在传输过程中也许不带任何信息,也许传输一些简单的报文。寻呼接收机小巧,携带方便且费用低廉,故发展极其迅速。 目前,寻呼信号无一例外地均采用数字编码信号。英国提出的ＰＯＣＳＡＧ码于１９８２年被ＣＣＩＲ推荐为“无线寻呼１号码”;我国也已将ＰＯＣＳＡＧ码用作我国公众无线寻呼的标准码;美国将格雷顺序码（ＧＳＣ）作为其１号寻呼码,ＰＯＣＳＡＧ码作为２号码。另外,还有一些其他的编码格式。所有这些编码方式的共同不足有以下几点。 （１…     

一种数字式多功能无线寻呼系统

本文介绍一种数字式多功能150MHz频段的无线寻呼系统。该系统颇具特点,由“寻人者”型编码器、 12~V/1.5A直流电源器、FSY—25型发射机、TX—1型布朗天线、BPR—200型寻呼机组成。本文对该系统作了概述,并对其组成设备的规格、特点、功能、作用作了较详细的介绍     

CDMA网络边界寻呼问题解决方案建议

针对CDMA网络密集城区的MSC边界及LAI区间存在寻呼响应率低的问题,文章简要介绍了系统间寻呼和多LAI寻呼原理,并结合深圳1900MHz CDMA实际网络介绍了该技术在解决CDMA网密集城区边界寻呼问题的应用。     

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.     

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.     

基于信令消息的VoLTE接续时延优化

承载于LTE的语音业务(VoLTE)无线频谱利用效率优于传统CS语音,高清语音和视频编解码的引入显著提高了通信质量,VoLTE呼叫接续时长较传统CS语音大幅缩短.主要针对VoLTE的接续时延,提出基于信令消息的VoLTE接续时延优化,依据VoLTE终端在接续过程中不同阶段的网元间交互的信令消息,从寻呼、域选、资源预留3个阶段分别对影响VoLTE接续时延的因素进行针对性分析,并给出相应的解决方案.     

AT89C51单片机在寻呼发信时延器中的应用

在由多基站组成的无线同播寻呼网中,相关发信机的信号发射到重叠区时存在时延差,而当时延差较大时就容易在重叠区产生误码,丢码现象,针对无线同播寻呼时延均衡的要求,设计了以ＡＴ８９Ｃ５１单片机为核心的寻呼发信时延器。本文介绍了发信时延器的硬件与软件设计,各项性能指标达到了预定要求。     

无线寻呼系统的新进展

主要介绍无线寻呼技术的一些新进展，特别是高速寻呼、双向寻呼和语音寻呼，对三种高速寻呼协议ＦＬＥＸ，ＥＲＭＥＳ和ＡＰＯＣ进行了简单评述。     

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。     

Internet寻呼业务应用前景可观

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。     

LAC区与寻呼关系浅析

LAC区用于标志不同的位置区域,随着网络的不断发展而进行LAC区的划分是必要的.LAC区的划分受寻呼次数的制约是很明显的.给出了寻呼原理、寻呼信令流程和寻呼参数设置,计算了在不同寻呼方式下的寻呼容量.结合现网情况分析了LAC区划分受寻呼制约的情况.根据话务模型给出了进行LAC区划分的合理方法.     

安徽国信公司高速寻呼网设计

分析了寻呼网的现状,介绍了安徽国信FLEX高速寻呼网的建设概况,并对高速寻呼网的设计作了一些具体的阐述。     

An Efficient Two‐Step Paging Strategy Using Base Station Paging Agents in Mobile Communication Networks

An effective paging strategy is essential for improving the utility of radio channels. This paper proposes a two‐step paging strategy which involves using base station paging agents to page a single cell at each paging. An analytical model is used to evaluate the performance of the proposed strategy. The proposed strategy is compared with the traditional simultaneous paging strategy and a recent proposal using the base station paging agents. The numerical results showed that the proposed strategy proficiently reduces paging cost on radio channels compared with other paging strategies.