US WEST is examining alternatives and taking steps to modernize its electromechanical switching network economically. This paper describes the use of digital switches in Host/Remote cluster configurations as a means to bring digital technology to rural areas, which form a large percentage of US WEST's territory. It focuses on the need to improve the economics of switch replacement by developing global modernization plans and establishing new business relationships with switch vendors.
{"title":"Rural network modernization in us west","authors":"E.R. Turnquist, J. Molina","doi":"10.1109/ISS.1990.765809","DOIUrl":"https://doi.org/10.1109/ISS.1990.765809","url":null,"abstract":"US WEST is examining alternatives and taking steps to modernize its electromechanical switching network economically. This paper describes the use of digital switches in Host/Remote cluster configurations as a means to bring digital technology to rural areas, which form a large percentage of US WEST's territory. It focuses on the need to improve the economics of switch replacement by developing global modernization plans and establishing new business relationships with switch vendors.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"396 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127593238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To ensure that ample call processing and other telecommunication processing capacity is available for future demand, the DMS computing core has been undergoing a continuous evolution. Since the introduction of the DMS-100 line of digital switching products, the demand for call processing capacity has steadily increased, justifying our selection of a highly evolvable technology base. Three factors account for this change: increasing requirements to support larger numbers of subscriber lines, in creasing feature penetrations, and increasing real-time requirements for complex features. A recent step in this evolution is the introduction of the DMS-SuperNode using high performance MC68OXX microprocessors. We are now incorporating the benefits of Reduced Instruction Set Computing or RISC technology which has the potential to satisfy future demand for call processing and telecommunication process capacity into the DMS computing core. Because of its highly regular architecture, a RISC processor can pipeline instructions very effectively and hence can operate at very high instruction issuing rates. RISC processors use cache, a high speed buffer inserted between the processor and the main memory, to increase the effective memory access speed. To effectively deploy RISC technology in telecommunications, a deep understanding of cache performance is needed. In developing RISC strategy, BKR scientists carried out an extensive cache analysis. This paper describes the analysis and its results.
{"title":"Cache analysis for risc in call processing applications","authors":"V. Phung, H. Johnson","doi":"10.1109/ISS.1990.765831","DOIUrl":"https://doi.org/10.1109/ISS.1990.765831","url":null,"abstract":"To ensure that ample call processing and other telecommunication processing capacity is available for future demand, the DMS computing core has been undergoing a continuous evolution. Since the introduction of the DMS-100 line of digital switching products, the demand for call processing capacity has steadily increased, justifying our selection of a highly evolvable technology base. Three factors account for this change: increasing requirements to support larger numbers of subscriber lines, in creasing feature penetrations, and increasing real-time requirements for complex features. A recent step in this evolution is the introduction of the DMS-SuperNode using high performance MC68OXX microprocessors. We are now incorporating the benefits of Reduced Instruction Set Computing or RISC technology which has the potential to satisfy future demand for call processing and telecommunication process capacity into the DMS computing core. Because of its highly regular architecture, a RISC processor can pipeline instructions very effectively and hence can operate at very high instruction issuing rates. RISC processors use cache, a high speed buffer inserted between the processor and the main memory, to increase the effective memory access speed. To effectively deploy RISC technology in telecommunications, a deep understanding of cache performance is needed. In developing RISC strategy, BKR scientists carried out an extensive cache analysis. This paper describes the analysis and its results.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125207644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Intelligent Network makes it possible to quickly and effectively introduce a wide variety of telecommunication services into the public network, and to provide new flexibility and capabilities inside the network which enable to define services from outside the network. This paper proposes the concepts for the Intelligent Network service definition and execution environment independent of specific services and physical resource characteristics. It also explains service control technologies under a three layered network architecture.
{"title":"Concepts and architecture for hierarchical service definition and service control of intelligent network","authors":"M. Yoshimi, N. Shigematsu, T. Omiya, S. Esaki","doi":"10.1109/ISS.1990.765807","DOIUrl":"https://doi.org/10.1109/ISS.1990.765807","url":null,"abstract":"The Intelligent Network makes it possible to quickly and effectively introduce a wide variety of telecommunication services into the public network, and to provide new flexibility and capabilities inside the network which enable to define services from outside the network. This paper proposes the concepts for the Intelligent Network service definition and execution environment independent of specific services and physical resource characteristics. It also explains service control technologies under a three layered network architecture.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131401954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To design the Intelligent Network requires a methodical approach. Starting from the service requirements that are established based on marketing objectives, one must derive the corresponding technical requirements, and then determine the technologies that support these requirements. In this paper it is proposed that the solution technologies for the Intelligent Network encompass distributed information processing, and that transaction processing is also an appropriate model for reliable application execution within the Intelligent Network.
{"title":"Distributed transaction processing aspects of the intelligent - network","authors":"T. Murray","doi":"10.1109/ISS.1990.765824","DOIUrl":"https://doi.org/10.1109/ISS.1990.765824","url":null,"abstract":"To design the Intelligent Network requires a methodical approach. Starting from the service requirements that are established based on marketing objectives, one must derive the corresponding technical requirements, and then determine the technologies that support these requirements. In this paper it is proposed that the solution technologies for the Intelligent Network encompass distributed information processing, and that transaction processing is also an appropriate model for reliable application execution within the Intelligent Network.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133310957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper considers preventive load control in ATM networks. A one link performance evaluation based on on/off traffic sources is carried out. Approximative models are derived, and a specific admission control algorithm based on one of the models is presented and the obtained transfer efficiency is derived. A Flow Enforcement function to supervise each connection is suggested and the correspondence between modelling parameters, flow enforcement parameters and parameters used by the admission control algorithm is considered.
{"title":"Load control in atm networks","authors":"S. Jacobsen, K. Moth, L. Dittmann, K. Sallberg","doi":"10.1109/ISS.1990.765820","DOIUrl":"https://doi.org/10.1109/ISS.1990.765820","url":null,"abstract":"This paper considers preventive load control in ATM networks. A one link performance evaluation based on on/off traffic sources is carried out. Approximative models are derived, and a specific admission control algorithm based on one of the models is presented and the obtained transfer efficiency is derived. A Flow Enforcement function to supervise each connection is suggested and the correspondence between modelling parameters, flow enforcement parameters and parameters used by the admission control algorithm is considered.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129735759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. C. Terreault, Y. Pacaud, M. Plouffe, A. Di Michele
This paper briefly describes how Bell Canada is modernizing its access network to support narrowband, wideband and future broadband services through the Building Fiber Access (BFA) thrust. BFA will be realized via the deployment of fiber remote terminals in both single and multi-customer buildings having service requirements over 300 lines, in heavy business areas, industrial parks, university campuses and residential complexes. This paper focuses on capabilities and key design requirements for a fiber remote terminal which satisfies the customers' expectations with regards to service flexibility, quality, reliability and responsiveness while allowing major simplification in terms of network operations, administration and maintenance (OA&M).
{"title":"Convergence of pair gain systems and switch remote access terminals in a fiber network","authors":"R. C. Terreault, Y. Pacaud, M. Plouffe, A. Di Michele","doi":"10.1109/ISS.1990.765811","DOIUrl":"https://doi.org/10.1109/ISS.1990.765811","url":null,"abstract":"This paper briefly describes how Bell Canada is modernizing its access network to support narrowband, wideband and future broadband services through the Building Fiber Access (BFA) thrust. BFA will be realized via the deployment of fiber remote terminals in both single and multi-customer buildings having service requirements over 300 lines, in heavy business areas, industrial parks, university campuses and residential complexes. This paper focuses on capabilities and key design requirements for a fiber remote terminal which satisfies the customers' expectations with regards to service flexibility, quality, reliability and responsiveness while allowing major simplification in terms of network operations, administration and maintenance (OA&M).","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128729269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. de Prycker, M. De Sorner, M. Wafteyne, J. Vandedrinck, J. van Vyve, M. Van Laethem
This paper describes the architecture of the transport net work in the local exchange (LEX) and the Subscriber group equipment (SGE) to be implemented for the Belgian broadband experiment. The functional and physical architecture of the LEX and the SGE will be described in this paper. Resulting from the requirement of maximum integration of communicative and distribution services, a connection-oriented switching fabric permitting tree structured multipoint connections has been defined; connection establishment protocols as well as maintenance facilities are described. Although developed within the frame of an experiment, the defined architecture and subsystems may well form the basis of a larger scale B-ISDN field trial.
{"title":"An atm switching architecture with intrinsic multicast capabilities for the belgian broadband experiment","authors":"M. de Prycker, M. De Sorner, M. Wafteyne, J. Vandedrinck, J. van Vyve, M. Van Laethem","doi":"10.1109/ISS.1990.765817","DOIUrl":"https://doi.org/10.1109/ISS.1990.765817","url":null,"abstract":"This paper describes the architecture of the transport net work in the local exchange (LEX) and the Subscriber group equipment (SGE) to be implemented for the Belgian broadband experiment. The functional and physical architecture of the LEX and the SGE will be described in this paper. Resulting from the requirement of maximum integration of communicative and distribution services, a connection-oriented switching fabric permitting tree structured multipoint connections has been defined; connection establishment protocols as well as maintenance facilities are described. Although developed within the frame of an experiment, the defined architecture and subsystems may well form the basis of a larger scale B-ISDN field trial.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125828681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Intelligent Network concept introduces new network elements, such as Service Control Points and Switch Adjuncts, and specifies additional flexibility for switching systems, allowing a greater variety of services to be offered by telecommunications service providers (telcos). Since conventional methods of subscriber and telco administration of these services are clearly not adequate, a new type of operations function, Service Man agemenent has been defined for Intelligent Network services to control and to administer subscriber-specific and service specific network information. Service-specific Service Manage ment Systems have been built and deployed in the U.S. to support the first generation of Intelligent Network services. This paper describes a new concept: an integrated set of Service Management functions which will give telcos the flexibility to support next generation Intelligent Network services and the abiliry to provide new degrees of subscriber and service provider access and control, while offering significant potential for cost reduction as compared to successive purchases of dedicated Service Management Systems for each service. Before the advent of the Intelligent Network, services were primarily implemented as features of switching systems and developed on a service-by-service basis. Control and management of these services were, and continue to be, performed by assorted operations systems which load, update, retrieve and audit switch-based parameters that configure, enable, disable, monitor and measure services. In addition, subscribers can exercise limited control through their telephone sets, over some of their services after they are enabled and configured, such as activation of Call Forwarding. Service Management affords new degrees of service access and control for service providers and subscribers by translating the conventional, physically-oriented network view into a service view for a specific service or for an individual subscriber. One way of implementing the described set of Service Management functions is via an integrated Service Management Operations System, generically referenced as SM-OS. Such a system is expected to be part of a new generation of operations systems based on a modular computing architecture and whose data are integrated into an overall Corporate Data Architecture and Logical Data Model. The system will be part of an integrated platform of operations and network systems which afford new degrees of service and operations programmability.
{"title":"Integrated service management for intelligent networks","authors":"R. J. Baseil, B. Gotz","doi":"10.1109/ISS.1990.765805","DOIUrl":"https://doi.org/10.1109/ISS.1990.765805","url":null,"abstract":"The Intelligent Network concept introduces new network elements, such as Service Control Points and Switch Adjuncts, and specifies additional flexibility for switching systems, allowing a greater variety of services to be offered by telecommunications service providers (telcos). Since conventional methods of subscriber and telco administration of these services are clearly not adequate, a new type of operations function, Service Man agemenent has been defined for Intelligent Network services to control and to administer subscriber-specific and service specific network information. Service-specific Service Manage ment Systems have been built and deployed in the U.S. to support the first generation of Intelligent Network services. This paper describes a new concept: an integrated set of Service Management functions which will give telcos the flexibility to support next generation Intelligent Network services and the abiliry to provide new degrees of subscriber and service provider access and control, while offering significant potential for cost reduction as compared to successive purchases of dedicated Service Management Systems for each service. Before the advent of the Intelligent Network, services were primarily implemented as features of switching systems and developed on a service-by-service basis. Control and management of these services were, and continue to be, performed by assorted operations systems which load, update, retrieve and audit switch-based parameters that configure, enable, disable, monitor and measure services. In addition, subscribers can exercise limited control through their telephone sets, over some of their services after they are enabled and configured, such as activation of Call Forwarding. Service Management affords new degrees of service access and control for service providers and subscribers by translating the conventional, physically-oriented network view into a service view for a specific service or for an individual subscriber. One way of implementing the described set of Service Management functions is via an integrated Service Management Operations System, generically referenced as SM-OS. Such a system is expected to be part of a new generation of operations systems based on a modular computing architecture and whose data are integrated into an overall Corporate Data Architecture and Logical Data Model. The system will be part of an integrated platform of operations and network systems which afford new degrees of service and operations programmability.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128974658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
TROPICOR System is a stored program control (SPC) digital telephone exchange developed by TELEBRAS R&D Center in Brazil. Its major feature is a fully decentralized control architecture based on a microprocessor network interconnected via triplicated signalling bus. Traditional SPC telephone equipment provides centralized, though sometimes distributed, control architecture based on a duplicated central processor. This paper introduces the TROPICO System and respective arquitecture, lighting its differences as compared to centralized systems and discussing the main advantages of its approach. The discussion is backed by pratical field data collected from a sample of 68.8 years of commercial exchange operation.
{"title":"Digital switching systems reliability.- the tropico approach and field results","authors":"C. Hugueney, S. Saraiva, G. Nunes","doi":"10.1109/ISS.1990.765814","DOIUrl":"https://doi.org/10.1109/ISS.1990.765814","url":null,"abstract":"TROPICOR System is a stored program control (SPC) digital telephone exchange developed by TELEBRAS R&D Center in Brazil. Its major feature is a fully decentralized control architecture based on a microprocessor network interconnected via triplicated signalling bus. Traditional SPC telephone equipment provides centralized, though sometimes distributed, control architecture based on a duplicated central processor. This paper introduces the TROPICO System and respective arquitecture, lighting its differences as compared to centralized systems and discussing the main advantages of its approach. The discussion is backed by pratical field data collected from a sample of 68.8 years of commercial exchange operation.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128757725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper proposes a high-through put selfrouting switch for ATM switching systems. The throughput of this switch is not decreased by internal contention. This is accomplished by using a rerouting algorithm which makes use of many embedded banyan networks and special routing information called remaining judgement times. This switch also has by-pass links for output lines and uses output buffers, which enhance switch performance by handling external contention among by-pass links and through the use of rerouting algorithms. A short-cut algorithm that improves throughput by employing the concept of the remaining judgement times is also presented. Analysis of switch throughput shows that it increases with the number of extra stages and can attain very high throughput levels.
{"title":"The rerouting banyan network","authors":"S. Urushidani, H. Imagawa, K. Yukimatsu","doi":"10.1109/ISS.1990.765803","DOIUrl":"https://doi.org/10.1109/ISS.1990.765803","url":null,"abstract":"This paper proposes a high-through put selfrouting switch for ATM switching systems. The throughput of this switch is not decreased by internal contention. This is accomplished by using a rerouting algorithm which makes use of many embedded banyan networks and special routing information called remaining judgement times. This switch also has by-pass links for output lines and uses output buffers, which enhance switch performance by handling external contention among by-pass links and through the use of rerouting algorithms. A short-cut algorithm that improves throughput by employing the concept of the remaining judgement times is also presented. Analysis of switch throughput shows that it increases with the number of extra stages and can attain very high throughput levels.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129638265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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