Methods of addressing the interactions of intelligent networkservices with embedded switch services

A key factor in the transition of the existing network to an intelligent network (IN) environment is the need to partition the network intelligence and to ensure the coexistence of the embedded switch services with the externally controlled services. If the network intelligence can be defined by entities (e.g. access control and routing, connection control, basic call control, feature control, etc.), then the issue is how to manage their distribution over the evolving network elements (NEs). The authors focus on the early phases of the IN, during a 1991-2 time frame, when these features must interwork with the existing features (e.g. those within the Centrex service). They provide an overview of the features interactions and arbitration policies prevailing in today's network. They then describe the framework for both single- and multinode networked features models. The issues of call control distributed over the NEs of the IN are treated as extensions to the concepts and interfaces needed to provide networked services like areawide Centrex and private virtual networks. A model for offering IN/1+ services is described     

Advanced intelligent networks: now a reality

This paper looks first at the background to the development of intelligent networking concepts and then tracks this development to the advanced intelligent networks (AINs) of today. The network architecture and basic nodal functions are explained, and a brief review given of the essential intelligent network building blocks, namely the IN (intelligent network) call model and the enhanced CCITT No.7 signalling system. Typical intelligent network services are examined and the tutorial finishes with a review of the latest IN standards     

Intelligent Network Analysis by Closed Queuing Models

With the wide deployment of intelligent network (IN) services, there is an urgent need to understand and solve teletraffic performance issues of the evolving network intelligence platform. This paper discusses a queuing system model for the performance analysis of IN call processing. The intelligent network is presented as a network of queues where the total number of customers (e.g., SSPs) is fixed, thus forming a closed queuing network. The IN distributed architecture is modeled as a finite source queuing model – M/G/1/K/K. The expected response time for that model is analyzed and computed. The numerical results and the corresponding curves are provided and, related to open questions, future work is summarized.     

在MTUP信令中增加EARLY_ACM功能

在GSM移动网中,由于智能新业务的不断增长,加之平等接入业务和就远入网路由原则的推广实施,呼叫接续的时间,尤其是主叫关口局至被叫端的接续过程会变得很长,超出等待ACM(AddressCompleteMessage)的时长,造成始发端因为后向接续超时而释放呼叫,导致呼叫失败。在ISUP中有early-ACM这样的机制,可以用来预防始发端因为后向接续超时而导致的呼叫被释放。可以在MTUP(MobileTelephoneUserPart)信令中引入early-ACM这样的机制来改善呼叫失败这样的情况。     

多SCP智能网的负载控制模型与算法

由于智能网的主要瓶颈是SCP的处理能力,因此本文提出了多SCPs智能网及其负载控制模型,并分析了该模型的负载控制要求。由于在智能网中引入了多SCP,因此对呼叫分发(路由)进行了讨论,提出了一种实用的负载控制算法。最后给出了模拟结果。     

彩铃业务与呼叫转移补充业务间的冲突解决

本文首先介绍了基于智能网方案下彩铃业务的信令流程和特征,然后按照呼叫转移补充业务的分类,结合彩铃业务的特点和性质,讨论了各类呼叫转移业务和彩铃业务之间存在的业务冲突,并给出了解决业务冲突的3种方案,最后再对3种方案进行了综合的比较和评价.     

Intelligent network requirements for personal communicationsservices

It is shown that a moderate set of capabilities within the service switching point (SSP), service control point (SCP), and intelligent peripheral (IP), which are the intelligent network (IN) components directly responsible for the real-time execution and control of end-user services, can engender a wide range of end-user personal communication service (PCS) features. These capabilities could be used as the starting point for an economic analysis of IN implementation costs versus service worth. From a very large target set of call model trigger check points (TCPs), the dozen or so identified in the CCITT Capability Set 1 are shown to be sufficient. The SCP and IP functional entity actions identified are also sufficient to support PCS core network functions     

A Study of Feature Interactions in Intelligent Networks

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Intelligent network/2: The architecture-The technicalchallenges-The opportunities

The Intelligent Network/2 (IN/2) architecture concept diverges from the traditional new service introduction approach by distributing call-processing capabilities across multiple network modules, by constructing network services with service-independent capabilities, and by using standard signaling protocols among the network elements. The IN/2 approach provides opportunities to implement new services while reducing the service introduction interval. The IN/1 architecture provides new-service introduction from a centralized point, allowing users throughout a wide geographic area to have access to the service simultaneously. The IN/2 concept extends the IN/1 approach and sharply reduces the new-service introduction interval. IN/2 applies the premise that multiple network services or service features can be constructed from a set of reusable network capabilities, which apply to many services and are therefore independent of a particular service application. An overview of the IN/2 architecture is presented, highlighting the key technical issues     

Integration of intelligent network services into future GSMnetworks

This article introduces various difficulties and issues in the basic scenario of integrating intelligent networks (INs) and the Global System for Mobile Communications (GSM). As an example, implementation of Universal Personal Telecommunications (UPT) is considered. This article does not offer a comprehensive analysis, but rather a tutorial view. The separation of cellular networks and IN is not well suited to provide common mobility-related services. The present signaling systems do not enable transfer of mobility-related parameters, such as the cell identity and international mobile subscriber identity (IMSI). A call connection to the service switching point must be set up every time IN services are used from the GSM network. The same information is stored in several network elements, and service creation and management are complex. With those disabilities in mind, two integration scenarios are introduced and their characteristics are compared. However, the aim is not to give detailed guidance for implementation, but rather to introduce different options and describe their most significant characteristics. It is important to be able to provide mobility-based information directly to the IN. Flexible integration calls for changes both in mobile exchanges and signalling systems. Mobile exchanges will be built with additional IN functionality and, in fact, future signalling systems will better carry mobility-related information. Mobility can be implemented with a rather small investment, provided that there are digital exchanges and transmission systems and the basic infrastructure has already been built. The required intelligence can be offered by using the existing Public Land Mobile Network (PLMN) or IN architecture     

软交换呼叫模型的研究与设计

呼叫模型是软交换设计的核心,软交换呼叫模型设计应体现网络融合及控制分离的特点。文中提出一种适合软交换特点的呼叫模型,该呼叫模型的设计借鉴并作了成熟的智能网呼叫模型改进,借用其连接模型和业务接口,同时增强媒体控制能力,使之与H.248/MEGACO媒体网关控制协议相配合,实现呼叫控制与媒体承载、业务逻辑与呼叫控制的分离。它支持多协议接入,满足开放式业务的需求,具有较好的灵活性和扩展性,可以较好地满足软交换的功能需求。     

移动智能网系统及其在我国的发展

与移动网的结合是智能网研究的新方向。ＥＴＳＩ提出的ＣＡＭＥＬ方案用来在ＧＳＭ网络中提供智能业务。北京邮电大学程控交换与通信网国家重点实验室在其已成功应用的固定智能网ＣＩＮ０２系统的基础上,参照ＣＡＭＥＬ方案推出了ＣＭＩＮ０２移动智能网系统。现在该系统可提供预付费业务、移动虚拟专用网业务和通用接入码业务。     

组建高效的客户服务中心

本文介绍了呼叫中心发展的历史、应用过程及系统结构，并提出通过与智能网、Ｉｎｔｅｒｎｅｔ结合以及与其他系统合建等手段来组建高效的客户服务中心的思路，对电信企业如何通过建立客户服务中心提高服务质量并通过智能业务带动传统业务的发展具有一定的借鉴作用。     

在迅速演进的网络中发展智能网业务

先进业务的成功将促进网络的迅速演进，网络将向同时提供基本电话业务，节点业务和智能网业务方向发展，北方电讯的智能网Ｓｅｒｖｉｃｅ Ｂｕｉｌｄｅｒ产品为智能网业务的开展提供了一种可选方案。在引进新业务时，运营公司需考虑和评估网络设计和业务设计的经济和技术因素，以作出正确的决策。     

移动智能网技术的研发现状及未来发展

本文对我国移动智能网的应用和发展进行了总结,介绍了移动智能网的最新标准演进情况;对第三代移动通信系统中智能网与移动网融合进行了分析;结合智能网应用中出现的不足,综述了移动智能网研究的关键技术和发展趋势;对近期的热点移动智能业务进行了概括介绍;对我国移动智能网的进一步建设和发展提出几点建设性的意见.     

Mobile agents - enabling technology for active intelligent networkimplementation

The emerging notion of active networks describes the general vision of communication network evolution, where the network nodes become active because they take part in the computation of applications and provision of customized services. In this context mobile agent technology and programmable switches are considered as enabling technologies. This article looks at the impact of mobile agent technology on telecommunication service environments, influenced by the intelligent network (IN) architecture. The authors illustrate how the integration of mobile agent platforms into IN elements, notably into the IN switches, will realize an active IN environment. This enables telecom services implemented through mobile service agents on a per user basis to be instantly deployed at programmable switching nodes, which results in better performance and fault tolerance compared to traditional IN service implementations     

Impact of the intelligent network on the capacity of networkelements

The effect that integration of the intelligent network (IN) concept into the existing network architecture has on the capacity of the various network elements is addressed. The effect of excessive load on that and other existing services is also examined. The discussion covers: methods of characterizing capacity and performance; major causes of increased load with the IN; perception of increased delay by the user; effect of delay on service introduction; and methods of improving IN performance. The example of the call-forwarding service is used to show the effect that IN can have on the performance of services, as perceived from the delays experienced by the user     

Customer service provisioning in intelligent networks

The author points out that despite the convenience of using functional components (FCs) as service building blocks, service provisioning in the intelligent network (IN) still presents major problems. He focuses on issues of responsiveness to customers. When customers are allowed to provision new IN services, it is necessary to consider whether the set of FCs can be directly used by customers without cause problems and whether the set of FCs of flexible enough to construct the services customers are likely to want. The author investigates customer service provisioning problems and flexibility in using the IN FCs, and proposes methods to support integrity control for service development. For concreteness, he focuses on the set of FCs defined in Bellcores's IN/1+ network     

An Extended Service Filtering Technique for Mass Calling-Type Services Using Intelligent Peripheral in an SCP-Bound Network

This paper proposes an extended service filtering technique to prevent overload in service control point (SCP) due to televoting (VOT) or mass calling (MAS) services with the heavy traffic characteristics. Also, this paper compares this extended technique with the existing overload control techniques, and calculates steady state call blocking probabilities in intelligent network (IN) under overload conditions. The proposed technique considers SCP overload and IN Capability Set (CS)-1 services (such as VOT or MAS service) that have to use the specialized resources of intelligent peripheral (IP). This technique uses first an activating step in which SCP requests service filtering to service switching point (SSP). Then, in the filtering step, SSP sends filtering results to SCP periodically or each Ncalls. Also, when filtering time-out expires, SSP stops service filtering, and sends service filtering response to SCP in the deactivating step. This paper applies this technique to VOT/MAS service, and calculates SCP and SSP-IP (circuit) call blocking probabilities by using an analytical VOT/MAS service model. With the modeling and analyzing of this new technique, it shows that this technique reduces the traffic flow into SCP from SSP and IP prominently.     

The intelligent network concept

The intelligent network (IN) concept evolved from the networks which are planned or in existence in 1988 to provide network services such as the 800 service. The IN architecture will require an expansion of the capabilities which recognize the need for specialized processing and formulate a query to a database system. The expanded capabilities, along with an expected increase in the number of calls requiring special processing, place greater demands on system resources. The distributed nature of service implementation, along with the complex interactions among services, requires advanced, highly efficient operations. The authors describe the IN architecture and the process of creating a service in that environment. An illustrative example is include