MSC Pool组网与传统组网的位置更新比较

简要介绍了传统组网和MSC Pool的技术原理及组网方式;对比分析了这2种组网方式下的3种位置更新,即移动台的位置更新、用户跨MSC Pool的位置更新及周期性位置更新;说明了MSC Pool组网方式较传统组网方式因消除了池内跨局位置更新,从而更好地释放了HLR和MSC的处理能力,提高了通信网络的可靠性和可用性。     

MSC POOL相邻池区切换自动均衡实现

本文针对MSCPOOL大规模组网部署后出现的相邻池区间跨POOL切换不均衡导致用户分布不均匀、话务不均衡问题，介绍了如何实现跨POOL切换的自动均衡、可控、可调，对MSCPOOL多池区组网规划优化有一定参考应用价值。     

跨本地网MSCPOOL组网分析

1概述 在核心网中采用MSCPOOL技术具有提高设备利用率、节省信令开销、减少局间切换以及提高网络容灾性能等许多方面的优势。但目前部分本地网较小,单独构建MSCPOOL成本较高,经济效益较低。跨本地网MSCPool组网使小本地网部署MSCPOOL成为可能,使最终网络具备了MSCServer的网络级容灾能力,并引入了MSCPool所具有的全部优势。2MSCPOOL的基本概念     

MSC POOL组网的位置更新探讨

本文讨论了MSC池组网的位置更新。相对传统组网,池组网因为采用共享核心网的组网策略,消除了池内的跨局位置更新,提高了MSC Server（移动交换中心服务器）的设备利用率。     

MSC POOL技术在河南移动网络中的应用与组网探讨

在介绍了MSCPOOL的技术原理和组网方案后,结合河南移动MSCPOOL的成功实施经验对这种全新的网络架构方案进行了阐述和探讨。     

MSCPOOL现网改造项目风险管理研究

随着移动IP技术的飞速发展和3G网络的顺利演进,传统的MAS安全备份机制已达不到当前软交换网络对安全性的需求程度。因此,中国的各大移动运营商开始大规模的应用3GR4组网的软交换设备,通过使用新的安全容灾备份机制——MSCPOOL组网技术来增加网络的安全程度。目前,MSCPOOL的组网技术在全国范围开始推广试点,现网改造经验很少,将风险管理运用到现网改造项目显得越来越重要。本文通过对MSCPOOL现网改造项目风险管理的基本介绍,研究风险管理在现网改造项目中的意义,并深入探究MSCPOOL现网改造项目的风险特征及风险管理的内容。     

MSC POOL技术在黑龙江移动网络中的应用

随着GSM网络规模的逐年增大．移动核心网的网络安全。资源共享和负荷均衡等需求变得越来越迫切,MSCPOOL技术的出现很好地解决了这些需求。本文在介绍7MSCPOOL的技术原理和组网方案后．结合黑龙江移动MSCPOOL的成功实施经验对这种全新的网络架构方案进行了阐述和探讨。     

MSC POOL＋Mini-Flex实现容灾的原理及解决方案

随着通信网络的发展．移动核心网的组网向着大容量．高集成方向发展．移动核心网的网络安全．资源共享和负荷均衡等需求变得越来越迫切。本文简要阐述了MSCPOOL＋Mini—Flex的技术的原理．组网结构．实现方式．来阐述现网中实现容灾的方案。     

MSC POOL技术在话务核心网中的应用研究

MSCPOOL可提高设备资源利用率，加强网络安全性。文章以国内第一个正式商用局为例，对其组网特性、技术方案、性能指标进行研究和分析，验证了系统功能的有效性。     

江苏移动高铁专网位置更新成功率优化分析及成果推广

江苏移动网优部门通过在两市高铁专网LAC区归属MSCPOOL间定义CO-VLR参数,提升了LAC区边界的位置更新成功率。该优化手段由于对网络质量改善效果明显,因此在省内进行了广泛推广。铁路沿线各市通过此项优化提升了LAC区边界的位置更新成功率,缩短了网络响应时延,消除了身份识别请求失败记录。本文对于高铁网络质量优化分析有巨大的参考价值。     

MSC POOL核心网性能分析

为了减少移动核心网的信令链路负荷,提高资源利用率,提出了一种核心网的组网方案。通过MSC POOL组网实现该方案,并对接入到MSC POOL核心网中的随机移动用户建立概率模型,利用泊松概率分布模型对MSC POOL网络进行理论定性分析和实验。实验结果表明,与传统组网相比,该方案降低了网络负载率,提高了切换成功率和位置更新成功率,对于移动网络结构和性能有着整体的提升。     

基于MSC1210Y的铁路道口安全防护无线预警系统设计

分析了列车接近检测传感器的原理,介绍了基于MSC1210Y单片机的铁路平交道口无线防护报警系统的软硬件设计及其便携式无线寻呼传输、太阳能电源系统等关键技术,给出了该系统在柳州铁路局的多处无人道口进行防护报警的试验结果.     

Information-Theory Based Optimal Location Management Schemes for Integrated Multi-System Wireless Networks

In a multisystem environment where a mobile node can utilize multiple interfaces and simultaneously connect to multiple providers, new opportunities exist for efficient location management strategies spanning heterogeneous cellular wireless networks. In this paper, an integrated framework is developed for location management in such a multi-system, fourth generation (4 G) wireless networks. This information-theoretic framework allows each individual sub-system to operate fairly independently, and does not require the knowledge of individual sub-network topologies. An efficient location management in such a loosely coupled network is designed by having a mobile node view its movement as a vector-valued sequence, and then transmit this sequence in an entropy coded form to the network. We demonstrate how an intelligent, integrated paging strategy must consider the joint residence probability distribution of a mobile node in multiple sub-networks. We prove that the determination of an optimal paging sequence is NP-complete, and also propose an efficient greedy heuristic to compute the paging sequence, both without and with bounds on the paging delay. Three different location tracking strategies are proposed and evaluated; they differ in their degrees of centralized control and provide tradeoff between the location update and paging costs. Simulation experiments demonstrate that our proposed schemes can result in more than 50% savings in both update and paging costs, in comparison with the basic movement-based, multi-system location management strategy.     

基于多跳蜂窝网的组位置管理策略

提出了一种成组进行位置管理的策略,分析了彼此临近的移动台组成一个自组织网的基本网络模型,提出了向中继点注册,由中继点进行信令压缩,组成组控制信令,成批向网络报告位置的位置更新的策略;采用M/M/n/n模型具体比较了批处理方案与传统方案的性能,说明作者的方案不仅减少了移动台的发射功率,还大量节省了频率资源,增加了系统的吞吐能力。     

Spontaneous Group Management in Mobile Ad Hoc Networks

This paper deals with the problem of Location Management in mobile ad hoc networks where users are organized in groups. In the following this type of systems are referred to as Mobile Ad hoc Networks for Group Operations (MANGO). This paper proposes a framework for location management which exploits the trend of mobile users to spontaneously form groups in MANGOs. The management procedures required to support such spontaneous groups, which are by nature dynamic, are introduced as well. The proposed spontaneous group management is based on a hierarchical location database architecture and the concept of Group Leader, which is a terminal responsible for the location update of a group of terminals. Objective of the proposed framework is minimizing the burden on location databases and, at the same time, the signaling issued by terminals. In this paper, distributed operations required to support the whole framework are properly introduced and described. Simulation experiments have been run in order to assess the proposed scheme. Performance results show that the introduced methodology allows reduced signaling and location updating.     

Location management methods for third generation mobile systems

This article provides an overview of the means and techniques used for subscriber location management in present cellular mobile networks. The overhead due to location management techniques used in the present cellular systems such as GSM, in particular in high traffic spots, has already been a source of concern and is expected to augment dramatically in future wireless systems. Several proposals have been made in the past addressing the problem associated with the cost of location management. The author provides an overview of these contributions; in particular, he classifies the techniques, mainly into non-memory-based and memory-based approaches. Subsequently, a simple evaluation of the current location updating procedure used in GSM is presented in the context of a PCS framework to illustrate the load placed on the radio channels and on the MSC/VLR processing     

LEO卫星网基于时间和距离的位置更新策略

针对LEO卫星网中的动态位置区划分提出的一种基于时间和距离的位置更新策略,不同以往的处理方式,提出的更新策略中动态位置区更新半径随着用户的运动速度和业务繁忙程度而改变,对高速用户和低速用户分别采用不同的更新半径,当系统的业务繁忙程度改变时更新半径也相应的改变,仿真结果表明文中提出的位置更新策略对于移动用户比较多并且业务突发情况,能有效的减少位置管理开销,节省了系统资源。     

The Virtual Overlap Region with Forwarding Pointer (VORFP) Technique for Tracking Mobile Users in Personal Communication Systems

Reducing the volume of location updates and cost of searching for location information are two important issues for tracking mobile users in personal communication systems. Many approaches have been proposed to improve both the location update traffic and searching costs. Some of these approaches can reduce access cost and some other approaches can reduce the location update cost and location update rate. In this paper, we shall propose a new approach for reducing both location update cost and searching cost (for finding mobile users location information). The new scheme called Virtual Overlap Region with Forwarding Pointer (VORFP) uses the forwarding pointer and the virtual overlap region concepts. The virtual overlap region technique is a good method for reducing the location update traffic, especially when a user backs and forths between adjacent cells. Our performance evaluations show that VORFP can significantly reduce searching cost and update cost.     

Group location tracking based on representative identity andvirtual VLR for transportation systems

A location tracking scheme known as group location tracking (GLT) is proposed to reduce the location update cost for terrestrial transportation systems (TSs) in personal communication networks. When a TS moves into a new registration area, the GLT scheme, based on a representative identity of the TS and a virtual visitor location register, updates location information by a group location update request message instead of individual location update of users. Compared with the IS-41, the GLT scheme significantly reduces signaling load