朗讯科技承建广州联通软交换试验网

朗讯科技近日宣布与中国联通签署广州软交换试验网协议。此协议标志着朗讯的软交换产品获得了中国联通公司的认可和接受。由朗讯公司提供的软交换解决方案包括朗讯软交换（LSS）和通用网关等设备。这些设备不仅承担和管理长途/汇接层的业务流量，而且通过联通公司的多业务MPLSIP/ATM核心网络承载和管理新一代IP及多媒体终端站点的通信流量。另外，朗讯的软交换解决方案为中国联通设计了从通用的平台平滑过渡到融合有线和无线的新一代网络的实施规划，可以帮助联通公司在全国范围的长途、VoIP、GSM和CDMA等多种网络上提供综合业务…     

SURPASS--铸造成功的下一代网络

SURPASS是西门子公司针对当前电信网络的发展趋势，于1999年提出的基于软交换机制的电信级下一代网络解决方案。西门子SURPASS网络方案通过在基于IP的宽带数据网络上增加信令和业务控制平台和面向各种现有网络的网关设备，以及对各种类型用户（POTS、ISDN、xDSL、H.323、SIP等）的接入和管理，实现基于数据网络的业务融合：即通过对不同网络、不同层次之间标准信令的适配和传递，在优化网络结构的同时提供与现有语音网络具有相同质量、可靠性和业务类型的语音业务，并且为所有用户灵活地引入基于开放业务平台的语音/数据网络融…     

黑龙江垦区软交换平台的规划与实践

阐述了NGN网络的结构、功能及特点,分析软交换功能实体在下一代网络中的主要作用,结合黑龙江垦区通信网络发展现状,融合PSTN、ISDN、ATM、IP等业务,采用开放式结构,规划设计黑龙江垦区软交换平台,制定IP地址规划、网络互通等方案,建设NGN核心控制设备、综合媒体网关、网管系统,在黑龙江垦区通信网络中实践。     

电力通信与信息融合系统安全探讨

实现电力通信与信息融合的最终目的,是把语音和数据放在统一的网架基础架构上传输,信息与通信通过软交换技术平台,进行融合,由于业务种类多、用户接入灵活,内容安全显著,我们需要加强监控体系与依靠体系的建设比重,加强网络整体安全的势态尤为显著。文章就通信与信息融合的系统安全进行探讨。     

基于软交换和MCU的一体化调度系统研究

为解决国家电网现存通信系统难以组建大型网络、各种协议和设备不便互联互通等问题,提出了一种基于软交换和MCU的一体化构架调度控制系统,融合了视频会议、IP电话、普通电话、视频监控等纷繁复杂的业务种类,让国家电网的通信调度人员可以通过任何设备、任何网络,获得声音、数据和图像,从而丰富人们的沟通方式,提高了调度的沟通效率。系统已经在浙江省实现了部署和实施。     

基于软交换和MCU的一体化调度系统研究

为解决国家电网现存通信系统难以组建大型网络、各种协议和设备不便互联互通等问题,提出了一种基于软交换和MCU的一体化构架调度控制系统,融合了视频会议、IP电话、普通电话、视频监控等纷繁复杂的业务种类,让国家电网的通信调度人员可以通过任何设备、任何网络,获得声音、数据和图像,从而丰富人们的沟通方式,提高了调度的沟通效率。系统已经在浙江省实现了部署和实施。     

SIP/SIP-T 协议在下一代网络中的应用

现代社会信息产业的高速发展，使得用户对业务的需求具有多样性。而现有网络并不能解决用户的多种需求，现有网络结构也不能够提供灵活的业务开发环境，在这种情况下，电信运营商需要这样一种网络结构：* 结构层次分明：易于管理；* 开放的业务开发平台：可以外包给第三方开发；* 开放的协议接口：各个厂家设备能够互通；* 能够融合现有网络：保护现有投资。目前业界所提出的软交换（SoftSwitch）正是为了满足这种网络结构。整个软交换体系结构分为四层，分别是：接入层、传送层、控制层、业务层（图1）。从图1中可以看出，SIP（会话发起…     

中兴通讯软交换系统解析

软交换技术作为实现当前各种网络融合与业务快速承载的关键技术,集中体现了“业务与呼叫控制分离、呼叫控制与承载分离”的思想,通过模块化的软件设计来实现在传统交换机中的控制、接续和业务处理等功能。软交换网络各网元之间通过标准的协议进行连接和通信,有很强的技术开放性,为支持多厂商设备互通,更快、更方便地提供融合语音、数据和视频特征的新业务提供了技术前提。在软交换应用领域,中兴通讯率先在国内市场推出了基于软交换技术的端到端解决方案,同时中兴通讯也是国内唯一拥有成功商用案例的设备制造厂商,经过长期商业营运考验,如今,…     

下一代网络软交换技术

软交换的定义随着计算机和通信技术的不断发展，通过在一个公共分组网络中承载话音、数据和图像已经被越来越多的运营商和设备制造商所认同。在这样的业务驱动和网络融合的趋势下，诞生了下一代网络（NGN）模型，实现在分组网络中，采用分布式网络结构，有效承载话音、数据和多媒体业务。作为NGN的核心技术，软交换的发展受到越来越多的关注；作为下一代网络的控制功能模块，软交换为NGN具有实时性要求的业务提供呼叫控制和连接控制功能。中国信息产业部电信传输研究所对软交换的定义是：“软交换设备是网络演进以及下一代分组网络的核…     

SIP会话启动协议

下一代网络是一个能够提供话音、数据、多媒体等多种业务的，集通信、信息、电子商务、娱乐于一体，满足自由通信的分组融合网络。SIP协议主要目的是为了解决IP网中的信令控制以及软交换设备间的通信，从而构成了下一代有增值业务平台作为电话信令协议。SIP协议凭借其简单、易于扩展、便于实现等诸多优点成为未来网络语音通信采用的主流协议，越来越受到业界的青睐。     

固网软交换向IMS演进方案

固网软交换向IP多媒体子系统(IMS)演进应采用合理的方法、步骤和策略。演进可以在继承原软交换(SS)公共交换电话网络业务仿真子系统(PES)业务功能的前提下,平滑地向IMS演进,逐步引入、扩展多媒体和移动业务,实现核心网层面的固定和移动融合(FMC)。下一代网络(NGN)核心控制层的软交换和IMS在基本架构上没有实质冲突,软交换主要面向公共交换电话网(PSTN)仿真业务,而IMS为实现FMC和多媒体业务,在移动性、安全、服务质量(QoS)、开放业务架构等方面作了有益的扩展,软交换向IMS演进在技术上是完全可行的。对于已经采用软交换的运营商,采用演进的方式实现基于IMS的全业务的NGN网络,可以节约投资,减小网络改造风险,降低运营成本。     

基于软交换的网络智能化方案

电信固网运营商的网优网改、无线市话（PHS）网络与公共交换电话网（PSTN）等网络的融合、通信网络宽带化和多媒体化、PSTN网络与第3代移动通信（3G）网络融合等催生了固网网络智能化的需求。通过软交换技术来满足这一需求是切实可行的方法。基于软交换的网络智能化解决方案丰富了通信业务，促进了固网和移动网的融合，是极具优势的网络智能化方案。     

Universal personal communications: Emergence of a paradigm shift in the communications industry

It is postulated that today we are in the midst of a major paradigm shift in the communications industry. The essence of this paradigm shift is a transition from today's universal telephone service which has been perfected over the past 100 years, to a future communication service environment, referred to as universal personal communication. Under this new paradigm, communications will be person based in contrast to the predominantly location-based communication environment of today. Societal trends, evolving global standards for communication, regulatory policies, and emergent technologies are seen as the forces driving such a transition. Universal personal communications will be characterized by flexible access to universal services permittingmore enduser control which will result in personalization and customization of such services. Furthermore, the centralized intelligence focus of today's communication networks needs to evolve toward a focus where network intelligence can be migrated to the periphery of the core transport network. The viability of universal personal communication will be critically dependent upon how well it addresses the end customer value proposition. Two key elements of this proposition are transparency of mobility and personalization of service environments. A zonal service environment model which classifies and characterizes these various service environments in terms of common communication parameters is proposed. This model is built around hierarchical structures for both cellular and digital wireless transmission, and can be viewed as critical towards the realization of transparent mobility management and personalization of services.     

基于软交换的下一代网络组网结构

下一代网络将是基于软交换系统的通信网络。在研究各种软交换系统互联机制的基础之上,结合软交换基于IP网络构建、信令与媒体分离等特点提出了基于软交换系统的下一代网络中可以采用的各种组网结构,比较了各种方式的优缺点,指明了其适用范围。最后给出了现有通信网向下一代通信网络演进过程中网络体系结构的演进方案。     

电力程控交换中心软交换组网设计

近年来,我国的电力企业取得了卓有成效的发展成就,电力通信业务突破了传统程控语音通信等单一的业务模式,逐渐朝着网络融合方向发展.传统的程控交换技术仅能够提供语音通话服务,难以满足多样化综合业务需求,因此,必须探索新的能够实现对电话交换网管理的新型通信技术.此次研究将宽带IP技术作为基础,结合最新通信技术软交换系统,在信令控制及媒体处理技术支持下,构建了电力程控交换中心软交换组网系统平台,为企业生产及通信业务发展提供帮助.     

无线网络重配置技术在基站中的应用

随着无线通信技术及各种网络标准的发展,是否能够实现异构网络的融合显得十分重要.重配置技术就是一种具有前瞻性的解决方案.这篇文章主要阐述在基站系统中的无线网络动态重配置技术的实现,使这种软件无线电基站成为一个多频段、多功能、可扩展的智能基站.设计出了实现重配置的系统结构及流程.最后在我们的模型系统中证实了重配置技术极大地提高了通信质量和服务质量.     

NGN、软交换和IMS的关系

下一代网络(NGN)是业界的热点话题,其中关于IP多媒体子系统(IMS)、软交换(Softswitch)的定位和未来发展方向需要达成共识。软交换和IMS都是属于NGN的业务网。软交换从设备的实现而言,应该可以平滑演进到IMS,但是从网络的演进而言,由于软交换将主要支持传统的公共交换电话网/综合业务数字网(PSTN/ISDN)业务,而它的基本业务和补充业务都是在本地实现,因此要实现向IMS的平滑演进有一定难度。     

IMS Based Fixed-Mobile Network Convergence

The IP Multimedia Subsystem (IMS) proposed by 3GPP embodies an integration of communications network with the Internet technology and a fabrication of Next Generation Network (NGN) with 3G technology. IMS has been widely acknowledged in both telecom and Information Technology (IT) industries as the core technology for Fixed-Mobile Convergence (FMC). In terms of network convergence, IMS integrates Internet IP, Softswitch and cellular core network technologies. With respect to service convergence, it incorporates open Parlay/OSA technology and web services technology. As to management convergence, it combines management and policy control technologies of telecom network and IP network.To cope with a grim challenge from the Internet, all standardization organizations are interacting to push forward the further development of IMS. A common IMS, proxy service and managed P2P service are important subjects for further research.     

Provision of unified IN functionality in the context of IMS

The IP Multimedia Subsystem (IMS) represents an attempt for networks convergence, allowing users of rich-content applications to communicate through any access network type. In the near future, IMS is expected to give operators and content providers the flexibility to exploit a multitude of new communication applications in a harmonized communication environment of heterogeneous IP networks. However, despite its merits, the standardization process of IMS networks is lagging behind, leaving harmonization issues of services provisioning, open. In this effort, main hindering factor is the existence of similar implementations customized per network technology. Particularly in what concerns the Intelligent Network (IN) services, these are provided in mobile networks by CAMEL (Customised Applications for Mobile networks Enhanced Logic) and in fixed networks by INAP (IN Application Part). With regard to this problem, the present work introduces a method for integrating into the context of IMS communications all types of IN logic that nowadays are available only in legacy networks. The key element of this method is a service interrogation logic, called IN-OAG (IN-Open Architecture Gateway), which can be integrated on the P-CSCF (Proxy-Call Service Control Function) component of IMS, as an enhancement for supporting IN interoperability. IN-OAG is dedicated to implementing interoperability between the core IMS and mobile, wireless or fixed networks. The functionality of the proposed architecture is shown through several example scenarios.     

Secure Personal Networks for IMT-Advanced Connectivity

The challenge to deliver the next generation of ubiquitous and converged network and service infrastructures for communication, computing and media, has forced research into innovative new directions. New infrastructures must overcome the scalability, flexibility, dependability and security bottlenecks of current ones in order to permit the emergence of dynamic and, pervasive and robust new communication technologies. This paper promotes secure personal networks (PNs) as a key IMT-Advanced technology candidate, in particular, contributing to fulfilling the requirement for global connectivity for IMT-Advanced communications. Advanced PN concepts, such as the PN-Federation can support a number of requirements related to connectivity for the successful adoption of IMT-Advanced systems and services. Introducing intelligence for managing, protecting, processing, and delivering information of mobile communication systems has been identified as the way towards ubiquitous, converged and secure communications. One way to do this is through cognition. This paper discusses an approach and application of intelligence in the context of achieving ubiquitous, converged, and secure communications. Namely, we apply cognitive radio to personal networks for improving IMT-Advanced system and service connectivity. Further, the paper provides an understanding of how best to combine cognition with the current mobile communication systems.