分布式智能网系统实现技术的研究

文章介绍智能网的分布式系统概念和用“分布式”多处理机技术实现大容量智能网系统的方法１。阐明分布式智能网系统呼叫处理的动态分配与调整过程。     

A REASSEMBLY STRATEGY FOR REDUCING IN/PCS SIGNALLING TRAFFIC

This paper proposes a simple assembly/disassembly part (ADP) for the signalling system no. 7 (SS7) protocol to reduce the signalling traffic loads in intelligent networks (IN) and personal communication service (PCS) networks. The ADP combines two or more messages with the same destinations into a single message, thereby reducing signalling traffic without affecting SS7 protocol operations. The numerical results show that the proposed method can reduce traffic among signalling points 9∼17%.     

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     

Signaling System No.7 in corporate networks

Corporate network user requirements are identified. The significance of Signaling System No.7 (SS7), in corporate network as a separate backbone signaling system for implementing a robust, flexible and transparent communication network is discussed. The architecture for a corporate network utilizing enhanced signaling is described. The use of SS7 instead of the integrated services digital network primary rate interface (ISDN PRI) is explored. Some SS7 applications in corporate networks are examined     

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.     

Intelligent network feature transaction interface

The feature transaction interface and associated software structures required to support an intelligent network are addressed. A layer service logic execution environment is used to describe the operation of the feature transaction interface for provisioning intelligent network services. Included in the discussion are: the need for service creation; unbundled service logic for functional flexibility; remote operation using the SS7 network; and reduced service-provisioning intervals. Service examples using the feature transaction interface are given     

The intelligent network in France

The introduction of an intelligent network (IN) architecture in France by France Telecom is described. Two main technical issues of present IN architecture are discussed: the programming interface to be used for service creation and the control-resource interface such as the SSP/SCP interface. The long-term evolution of IN, including the application to networks other than public switched telephone networks (PSTN) and the development of operating systems to handle IN-supported services, is outlined. Major technical problems in implementing a global IN architecture are also discussed     

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     

基于智能网的电子售卡系统设计

由于目前电话卡制卡周期长、成本较高,不利于运营商追求利益的最大化,同时也不利于环保。基于以上电话卡的弊端和智能网在实现新业务方面的优势,提出了基于智能网的电子售卡系统设计的新方案。并在实现原理、业务流程等方面进行了详细论述。最后分析了此系统的优势并对其前景进行了展望。     

Evolving intelligent interexchange network-an SS7 perspective

The role of common channel signaling, referred to as Signaling System No.7 (SS7), in the evolution of services in an interexchange carrier environment is discussed. The importance of SS7 in evolving the intelligent network necessary to support these services is addressed. Interworking with virtual private networks via the out-of-band ISDN messaging channel (D-channel) to extend the capabilities of SS7 network signaling to customer networks is also discussed. For ubiquitous support of ISDN, CLASS, and future services, the interworking of interexchange SS7 with domestic local exchange carriers as well as foreign administrations is critical. This service and intelligent network evolution is described. Emphasis is placed on services and the anticipated migration to those types of services which demand an intelligent interaction and close coupling of both virtual private networks and local public switched networks to the interexchange network     

Globalizing IN for the new age

The future directions of intelligent network (IN) enhancements are discussed. The reasons why globalization of service provisions based on IN technology will be indispensable are also discussed. The functions required for global INs are analyzed. Possible schemes for IN function distributions are identified. The functions that should be centralized and distributed are clarified. Global IN architecture models are proposed. The areas which need extensive study for global INs are reviewed     

容灾技术在移动智能网中的应用研究

容灾技术对于关键业务服务系统的运行保障有非常重要的作用.本文首先介绍了容灾体系的构成及其关键技术--远程数据复制,然后结合电信网络中的关键业务系统--移动智能网,对容灾技术的应用进行了分析,提出了基于数据库实现远程数据复制的移动智能网容灾方案,最后还对容灾技术的发展趋势及其在移动智能网中的应用前景进行了简要介绍.     

IN/B-ISDN综合实现视频点播的方案

本文提出了在ＩＮ／Ｂ－ＩＳＤＮ综合的平台上实现视频点播业务的新方案,即用智能网的方法将Ｂ－ＩＳＤＮ宽带网络中的各种ＯＶＤ服务器统一控制和管理起来,既方便用户接入ＶＯＤ业务,又可使ＶＯＤ资源得到充分的利用。     

Realising Effective Intelligent Network Overload Controls

The traffic attracted by intelligent network (IN) services is often volatile in nature. Many IN realisations have a centralised physical architecture (although the standards only define the functional architecture in a distributed way), which means that they are vulnerable to overload from incoming traffic, which it is therefore essential to control. An IN platform typically has a processing capacity much greater than each network destination to which it routes traffic. Therefore control of outgoing traffic is necessary as well. IN standards only define a means to carry control messages — they do not provide methods to achieve effective overload control. This paper presents overload control designs which integrate these principles and thus meet fundamental requirements such as bounding response times and limiting ineffective traffic, while maximising the occupancy of network destinations. It is also shown how control parameter values may be optimised by appropriate modelling.     

Optimizing the server utilization in intelligent broadband networks

Intelligent network (IN) architectures are investigated globally as potential candidates for the rapid introduction of advanced multimedia services. The IN concept is based on the introduction of intelligent servers in the network, able to handle complex service requests by cooperating with the signalling system of the network. The design and implementation of the physical entities participating in an IN session is a critical issue as it defines the system performance. In this paper we propose a methodology for modelling the physical and functional entities which is used to capture the performance of IN‐based configurations. We put our emphasis on the processing speed required for the execution of the IN processes in the servers and we present results with reference to the system performance and the mapping of functions to physical entities. Copyright © 2000 John Wiley & Sons, Ltd.     

PHS roaming signaling protocol architecture toward global mobilitynetwork

The network for supporting the global personal communication is called the global mobility network (GLOMONET), where global mobility is guaranteed by coordination between intelligent networks (INs). This paper describes the implementation of a roaming signaling protocol for the personal handy-phone system (PHS) GLOMONET, clarifying the concepts of the PHS architecture regarding the GLOMONET. The PHS is a more economical personal communication system than existing cellular systems, by introducing the concept that the PHS service is provided by the most effective use of the existing ISDN and IN functions, where the majority of network functions to provide ISDN services are commonly used for functions for PHS service provision. The PHS mobility function realized by the IN guarantees flexible and effective roaming service provision for the globalization of future personal communication. The proposed PHS signaling protocol architecture is based on the intelligent network capability set 2 (IN CS2) defined by the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) Study Group 11 and a visitor location register (VLR) database scheme with efficient signal transfer in the GLOMONET. The PHS specific roaming signaling protocol is defined by the service-independent IN application protocol (INAP). The proposed PHS concepts and roaming signaling protocol were reflected to the national telecommunications standards in the Telecommunication Technical Committee (TTC) and standards in the PHS-memorandum of understanding (MoU)     

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     

PROMS: a PRO‐active Monitoring System for SS7 networks

In this paper, we propose a PRO‐active Monitoring System (PROMS) for SS7 networks, which actively monitors all signaling network management messages of SS7 networks, alerts operators when there is a potential network error, and provides intelligent diagnosis based on fuzzy logic and neural networks. Copyright © 2000 John Wiley & Sons, Ltd.     

Consideration on common channel signaling evolution for globalintelligent networking

With the evolution of digital networks and intelligent network (IN) capabilities, the role of common channel signaling has become more and more important. In respect to IN, common channel signaling would play a significant role not only inside one network but also over multiple networks. International credit card validation and internetworking for digital mobile services represented by GSM (Global System for Mobile Communications) are examples which utilize internetwork signaling capabilities in the framework of the initial-phase IN. Enhanced service providers (ESPs) may access the public network through the common channel signaling interface to make use of the IN capabilities, as is being discussed in terms of ONA (open network architecture) or ONP (open network provision). This paper first identifies various scenarios where internetwork signaling interactions would take place in the framework of IN in the forthcoming era. It then identifies various requirements to cope with these scenarios. It finally discusses the directions for evolution of common channel signaling toward global intelligent networking