The introduction of the Intelligent Network in Italy is a strategic objective for SIP, the Italian tele-phone operator. The culover of the first Phase Of IN in Italy is planned by 1992; this Phase will include the following advanced services: Green Number, Private Virtual Network (both already commercialized with an interim solution), premium charge, mass calling and universal numbering. Starting from the present services implementation, the paper depicts the activities already carried out for the IN introduction, the plans and the main technical and architectural choices.
{"title":"The introduction of the intelligent network in Italy - a strategic objective and a challenge for the 90's","authors":"P. Bagnoli, E. Cancer, E. Guarene","doi":"10.1109/ISS.1990.770123","DOIUrl":"https://doi.org/10.1109/ISS.1990.770123","url":null,"abstract":"The introduction of the Intelligent Network in Italy is a strategic objective for SIP, the Italian tele-phone operator. The culover of the first Phase Of IN in Italy is planned by 1992; this Phase will include the following advanced services: Green Number, Private Virtual Network (both already commercialized with an interim solution), premium charge, mass calling and universal numbering. Starting from the present services implementation, the paper depicts the activities already carried out for the IN introduction, the plans and the main technical and architectural choices.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128621262","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 deals with the means for doing a thorough and complete job in testing Switching products for use by local telephone companies. Traditionally, testing of switching equipment has been done from theperspective of how the switch should work given normal stimuli. Little attention has been paid to testing the limits of the equipment in "real world" situations. A discussion of the change in testing perspective required is presented. In addition, testing approaches and tools, particularly automated tools, are discussed along with their importance in establishing the confidence levels with which results can be viewed.
{"title":"Testing for the \"real world\" - new tools for new testing needs","authors":"D. Waechter, J. E. Clark","doi":"10.1109/ISS.1990.770109","DOIUrl":"https://doi.org/10.1109/ISS.1990.770109","url":null,"abstract":"This paper deals with the means for doing a thorough and complete job in testing Switching products for use by local telephone companies. Traditionally, testing of switching equipment has been done from theperspective of how the switch should work given normal stimuli. Little attention has been paid to testing the limits of the equipment in \"real world\" situations. A discussion of the change in testing perspective required is presented. In addition, testing approaches and tools, particularly automated tools, are discussed along with their importance in establishing the confidence levels with which results can be viewed.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125579831","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 future Broadband Integrated Services Digital Network, B-ISDX, will have to support a very wide variety of different services with very diverse characteristics. It is generally agreed, that the new Asynchronous Transfer Mode,ATM, currently under standardization in CCITT and other organizations, has the potential to become a widely used general transport mechanism supporting many of these services. Thus, ATM switches will be important network components in the B-ISDN. This paper describes the implementation of such a switch. First the requirements that can be put on a general B-ISDN ATM switch are discussed. Then some different switch topologies together with their overall characteristics are briefly treated. Finally, the implementation of a prototype switch with an architecture chosen to meet the requirements is described. The implementation of the prototype is currently taking place at Ellemtel Telecommunications system Laboratories. Part of this work is carried out within the RACE project ATMOSPHERIC.
{"title":"An ATM switch implementation - technique and technology","authors":"I. Gard, J. Ftooth","doi":"10.1109/ISS.1990.770102","DOIUrl":"https://doi.org/10.1109/ISS.1990.770102","url":null,"abstract":"The future Broadband Integrated Services Digital Network, B-ISDX, will have to support a very wide variety of different services with very diverse characteristics. It is generally agreed, that the new Asynchronous Transfer Mode,ATM, currently under standardization in CCITT and other organizations, has the potential to become a widely used general transport mechanism supporting many of these services. Thus, ATM switches will be important network components in the B-ISDN. This paper describes the implementation of such a switch. First the requirements that can be put on a general B-ISDN ATM switch are discussed. Then some different switch topologies together with their overall characteristics are briefly treated. Finally, the implementation of a prototype switch with an architecture chosen to meet the requirements is described. The implementation of the prototype is currently taking place at Ellemtel Telecommunications system Laboratories. Part of this work is carried out within the RACE project ATMOSPHERIC.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"24 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120923434","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 focuses on the generic problem of designing a large NxN (N 1000) high-performance, broadband packet (or ATM) switch. Despite recent advances in switch architectures, practical switch dimensions continue to be severely limited by both the technological and physical constraints of packaging (e.g., chip or board sizes). Here, we focus on switch growability: we provide ways to construct arbitrarily large switches out of modest-size packet switches, without sacrificing overall delay/throughput performance. We propose and study a growable switch architecture based on three key principles: (a) a Generalized Knockout Principle exploits the statistical behavior of packet arrivals and thereby reduces the interconnect complexity; (b) output queueing yields the best possible delay/throughput performance; and (c) distributed intelligence in routing packets through the interconnect fabric eliminates internal path conflicts. Other attractive features of the proposed architecture include the guarantee of first-infirst-out packet sequence, and broadcast and muldcast capabilities. In a Broadband ISDN example, we show a 2048x2048 switch configuration with building blocks of 42x16 packet switch modules and 128x128 interconnect modules, both of which fall within existing hardware capabilities. We present an upper bound on the cell loss probability for arbitrary patterns of independent cell arrivals, and show that the cell loss can be made negligibly small. For example, to guarantee less than 10/sup -9/ cell loss probability, this growable architecture requires packet switch modules ofilimension 47x16,45x16, 42xl6, and 39x16 for 100%, 90%, 80%, and 70% traffic loads, respectively.
{"title":"A modular braodband (ATM) switch architecture with optimum performance","authors":"K. Eng, M. Karol, Chlh-Un","doi":"10.1109/ISS.1990.770091","DOIUrl":"https://doi.org/10.1109/ISS.1990.770091","url":null,"abstract":"This paper focuses on the generic problem of designing a large NxN (N 1000) high-performance, broadband packet (or ATM) switch. Despite recent advances in switch architectures, practical switch dimensions continue to be severely limited by both the technological and physical constraints of packaging (e.g., chip or board sizes). Here, we focus on switch growability: we provide ways to construct arbitrarily large switches out of modest-size packet switches, without sacrificing overall delay/throughput performance. We propose and study a growable switch architecture based on three key principles: (a) a Generalized Knockout Principle exploits the statistical behavior of packet arrivals and thereby reduces the interconnect complexity; (b) output queueing yields the best possible delay/throughput performance; and (c) distributed intelligence in routing packets through the interconnect fabric eliminates internal path conflicts. Other attractive features of the proposed architecture include the guarantee of first-infirst-out packet sequence, and broadcast and muldcast capabilities. In a Broadband ISDN example, we show a 2048x2048 switch configuration with building blocks of 42x16 packet switch modules and 128x128 interconnect modules, both of which fall within existing hardware capabilities. We present an upper bound on the cell loss probability for arbitrary patterns of independent cell arrivals, and show that the cell loss can be made negligibly small. For example, to guarantee less than 10/sup -9/ cell loss probability, this growable architecture requires packet switch modules ofilimension 47x16,45x16, 42xl6, and 39x16 for 100%, 90%, 80%, and 70% traffic loads, respectively.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123883164","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 an Operations, Administration and Maintenance (OA&M) hierarchy based on Remote Operations standards and the development of object-oriented systems and protocols. These developments will be a major enabling factor in the evolution of high-quality, low-cost, and high-functionality networks. Recommendations are made as to what actions suppliers and network operators should be taking to achieve these goals.
{"title":"An approach to providing exchange operations support systems","authors":"T. Long, K. Burton, C. Williams, K. Blakeslee","doi":"10.1109/ISS.1990.768717","DOIUrl":"https://doi.org/10.1109/ISS.1990.768717","url":null,"abstract":"This paper proposes an Operations, Administration and Maintenance (OA&M) hierarchy based on Remote Operations standards and the development of object-oriented systems and protocols. These developments will be a major enabling factor in the evolution of high-quality, low-cost, and high-functionality networks. Recommendations are made as to what actions suppliers and network operators should be taking to achieve these goals.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132602691","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 objective of this paper is to describe one of the key ingredients for introducing services on an intelligent network, the service creation environment. nis environment will facilitate all the phases of service ereation: the specification or modification of services, their development, their test and validation and finally their deployment in the network The paperfirst gives an overview of FRANCE TELECOM's intelligent network and then outlines the structure of its service creation environment. Finally, in order to illustrate the approach, it focuses on two elements of this environment. Thejrst element is a tool that allows the designer to define the service data and the second one is a tool to define the service logic. INTRODUCTION One of the aims of the "Intelligent Network" is to allow for rapid and easy service introduction. To this end, the telecommunication network (PSTN, data network, ...) must be organized so as to provide an infrastructure that speeds up the introduction of new servicts. But in addition, it is also nccessBly to facilitate their definition. This can be pcrfonned by means of a service creation environment helping to describe service logic and service data. The final objective is to be able to introduce a complex new service within a few months, a simpler one within a few weeks and to modify any service within a few days. For instance, if the network is the PSTN (Public Switched Telephone Network), a complex servicx. could be PVN (Private Viaual Network) and a simpler senice could be Tclevoting. 1. OVERWEW OF FRANCE TELECOM'S INTELLIGENT NOWORK FRANCE TELECOM's intelligent network is based on two main service-independent functional entities: the "Point de Commande des Services" (PCS) and the "Commutateur d'Acc& aux Services" (CAS, close to the SSP). The PCS performs the "intelligent" part of the service, as it knows both the service logic and the service data. The PCS function may be part of a network node (for instance, an exchange in the PSTN) or outside the network node in an intelligent node. The CAS function is always located in a network node. It allows the node to perform a generic l i t of elementary operations under the control of the PCS function. The intelligent node and the network node hosting the CAS function arc not the only elements of FRANCE TEECOM's intelligent network (see Fig. 1). The other service-independent elements arc: . The INDB (Intelligent Network DataBase). It is an intelligent node that may be accesscd only by PCSs. The interface is based on a Query/Response type of dialogue, . The Charging Center, a machine that collects data about the communications from PCS or CAS and that will be Connected to FRANCE TELECOM's future integrated billing system, =GATE. The IP (Intelligent Peripheral). This is a machine that provides resources that are not located in network nodes. Ips are controlled by CAS and PCS. The signalling network (SS7 network for the PSTN). It allows for the interconnection of intell
{"title":"Service creation for the intelligent network","authors":"G. Brégant, R. Kung","doi":"10.1109/ISS.1990.768706","DOIUrl":"https://doi.org/10.1109/ISS.1990.768706","url":null,"abstract":"The objective of this paper is to describe one of the key ingredients for introducing services on an intelligent network, the service creation environment. nis environment will facilitate all the phases of service ereation: the specification or modification of services, their development, their test and validation and finally their deployment in the network The paperfirst gives an overview of FRANCE TELECOM's intelligent network and then outlines the structure of its service creation environment. Finally, in order to illustrate the approach, it focuses on two elements of this environment. Thejrst element is a tool that allows the designer to define the service data and the second one is a tool to define the service logic. INTRODUCTION One of the aims of the \"Intelligent Network\" is to allow for rapid and easy service introduction. To this end, the telecommunication network (PSTN, data network, ...) must be organized so as to provide an infrastructure that speeds up the introduction of new servicts. But in addition, it is also nccessBly to facilitate their definition. This can be pcrfonned by means of a service creation environment helping to describe service logic and service data. The final objective is to be able to introduce a complex new service within a few months, a simpler one within a few weeks and to modify any service within a few days. For instance, if the network is the PSTN (Public Switched Telephone Network), a complex servicx. could be PVN (Private Viaual Network) and a simpler senice could be Tclevoting. 1. OVERWEW OF FRANCE TELECOM'S INTELLIGENT NOWORK FRANCE TELECOM's intelligent network is based on two main service-independent functional entities: the \"Point de Commande des Services\" (PCS) and the \"Commutateur d'Acc& aux Services\" (CAS, close to the SSP). The PCS performs the \"intelligent\" part of the service, as it knows both the service logic and the service data. The PCS function may be part of a network node (for instance, an exchange in the PSTN) or outside the network node in an intelligent node. The CAS function is always located in a network node. It allows the node to perform a generic l i t of elementary operations under the control of the PCS function. The intelligent node and the network node hosting the CAS function arc not the only elements of FRANCE TEECOM's intelligent network (see Fig. 1). The other service-independent elements arc: . The INDB (Intelligent Network DataBase). It is an intelligent node that may be accesscd only by PCSs. The interface is based on a Query/Response type of dialogue, . The Charging Center, a machine that collects data about the communications from PCS or CAS and that will be Connected to FRANCE TELECOM's future integrated billing system, =GATE. The IP (Intelligent Peripheral). This is a machine that provides resources that are not located in network nodes. Ips are controlled by CAS and PCS. The signalling network (SS7 network for the PSTN). It allows for the interconnection of intell","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123103189","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 period since ISS'87 has seen a great deal of industry wide activity on the requirements, design and standardization of the Intelligent Network. Although there are many outstanding issues to be resolved before a consensus is achieved on Intelligent Network Architecture and its evolution, there has been a convergence of thinking on the role of the Intelligent Network, on its major elements, and on the associated design considerations, including compatibility with the existing network.
{"title":"Application of a service-independent architecture","authors":"I. Ebert, P. Richards, J. McGee","doi":"10.1109/ISS.1990.770107","DOIUrl":"https://doi.org/10.1109/ISS.1990.770107","url":null,"abstract":"The period since ISS'87 has seen a great deal of industry wide activity on the requirements, design and standardization of the Intelligent Network. Although there are many outstanding issues to be resolved before a consensus is achieved on Intelligent Network Architecture and its evolution, there has been a convergence of thinking on the role of the Intelligent Network, on its major elements, and on the associated design considerations, including compatibility with the existing network.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127856373","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}
Cellular telecommunications is growing at a rapid rate throughout the world since its introduction in the United States by AT&T in 1981. Current usage within the United States has reached the two millionth customer mark and is still expanding. Market forcasters expect cellular customer usage to grow to 78 to 20 million subscribers by mid-year 1993, which represents a penetration rate within the U.S. of approximately 10 percent. Simultaneous with this expanding demand for cellular service, the U.S. cellular standards organization TM (Telecommunications Industry Association)and the Cellular Telecommunications Industry Association (CTIA) is cooperating in the development of the next generation digital radio standards for technology deployment in the 1991 time frame. This next generation technology has the potential of increasing the number of customers within the currently assigned U.S. cellular spectrum by afactor of three to four. Based on the needs of cellular network providers for high capacity and more flexibility, AT&T has developed a next generation digital cellular base station. The three key technologies to the implementation of AT&T's new digital cellular base station system are the intelligent control complex, analog and digital radio units and base station facilities networking. The intelligent base station control complex has been designed to support the emerging U.S. 30 kHz TDMA standard at the user to radio network interface and programmable communications pro cessors at the switching center interface. Radio technology is exploited by taking advantage of state-of-the-art digital radio channel techniques including linear amplification and digital signal processing. Substantial physical size reduction is achieved through extensive use of surface mount technology. Vie system has been designed as a world class product with rhefkxibility to handle different radio standards and network transmission inter faces. The system is designed to collect information about the performance of the mobile network there by enhancing the operator's ability to diagnose troubles, to assess performance, and with the help of the mobile switching center, to take corrective action. This paper will examine AT&T's next generation digital cellular base stationfrom an architecture, technology and application perspective.
{"title":"AT&T next generation digital cellular base station technology","authors":"R. W. Henn, R.S. Kerby, J. Russell","doi":"10.1109/ISS.1990.768729","DOIUrl":"https://doi.org/10.1109/ISS.1990.768729","url":null,"abstract":"Cellular telecommunications is growing at a rapid rate throughout the world since its introduction in the United States by AT&T in 1981. Current usage within the United States has reached the two millionth customer mark and is still expanding. Market forcasters expect cellular customer usage to grow to 78 to 20 million subscribers by mid-year 1993, which represents a penetration rate within the U.S. of approximately 10 percent. Simultaneous with this expanding demand for cellular service, the U.S. cellular standards organization TM (Telecommunications Industry Association)and the Cellular Telecommunications Industry Association (CTIA) is cooperating in the development of the next generation digital radio standards for technology deployment in the 1991 time frame. This next generation technology has the potential of increasing the number of customers within the currently assigned U.S. cellular spectrum by afactor of three to four. Based on the needs of cellular network providers for high capacity and more flexibility, AT&T has developed a next generation digital cellular base station. The three key technologies to the implementation of AT&T's new digital cellular base station system are the intelligent control complex, analog and digital radio units and base station facilities networking. The intelligent base station control complex has been designed to support the emerging U.S. 30 kHz TDMA standard at the user to radio network interface and programmable communications pro cessors at the switching center interface. Radio technology is exploited by taking advantage of state-of-the-art digital radio channel techniques including linear amplification and digital signal processing. Substantial physical size reduction is achieved through extensive use of surface mount technology. Vie system has been designed as a world class product with rhefkxibility to handle different radio standards and network transmission inter faces. The system is designed to collect information about the performance of the mobile network there by enhancing the operator's ability to diagnose troubles, to assess performance, and with the help of the mobile switching center, to take corrective action. This paper will examine AT&T's next generation digital cellular base stationfrom an architecture, technology and application perspective.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134086384","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 discusses the configuration of an ATM(Asynchronous Transfer Mode) switching network with a shared buffer memory switch (SBMS) which has the potential to provide good traffic characteristics and easy LSI implementation. The scaling factors of the ATM switching network under a condition of mixed applications are discussed first. Then the SBMS as the unit element ofthe multi-stage switching network is described, and its performance evaluation and experimental data are introduced. The data indicate excellent performance under burst cell arrival condition. Last a concept of a large scale ATM switching network configuration with multi-stage switches is proposed. The non blocking condition in ATM multi-stage switching network as an alternative resource management scheme is described.
{"title":"Large scale atm multi-stage switching network with shared buffer memory switches","authors":"Y. Sakurai, N. Ido, S. Gohara, N. Endo","doi":"10.1109/ISS.1990.770118","DOIUrl":"https://doi.org/10.1109/ISS.1990.770118","url":null,"abstract":"This paper discusses the configuration of an ATM(Asynchronous Transfer Mode) switching network with a shared buffer memory switch (SBMS) which has the potential to provide good traffic characteristics and easy LSI implementation. The scaling factors of the ATM switching network under a condition of mixed applications are discussed first. Then the SBMS as the unit element ofthe multi-stage switching network is described, and its performance evaluation and experimental data are introduced. The data indicate excellent performance under burst cell arrival condition. Last a concept of a large scale ATM switching network configuration with multi-stage switches is proposed. The non blocking condition in ATM multi-stage switching network as an alternative resource management scheme is described.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134131204","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 extensive deployment of high-bandwidth fiber-optic transmission facilities has increased the amount of damage that can be caused by a single failtire. To reduce the risk of a catastrophic loss of service, we develop a simple distributed protocol for maintaining the call-canying capacity of a telecommunications trunk network after the failure of certain network components. Our protocol is designed for a reconfigurable trunk network consisting of high-bandwidth fiber links connected through reconfigurable digital cross connect nodes. It works for both node and link failures Our solution has two parts: first cause the surviving digital cross connects to agree on the topology (i e., what is up and what is down) and second, based on the agreed topology, reconfigure the digital cross connect nodes to restore as much call-carrying capacity as possible.
{"title":"A distributed protocol to improve the survivability of trunk networks","authors":"B. Coan, M. Vecchi, Uang T. Wu","doi":"10.1109/ISS.1990.770127","DOIUrl":"https://doi.org/10.1109/ISS.1990.770127","url":null,"abstract":"The extensive deployment of high-bandwidth fiber-optic transmission facilities has increased the amount of damage that can be caused by a single failtire. To reduce the risk of a catastrophic loss of service, we develop a simple distributed protocol for maintaining the call-canying capacity of a telecommunications trunk network after the failure of certain network components. Our protocol is designed for a reconfigurable trunk network consisting of high-bandwidth fiber links connected through reconfigurable digital cross connect nodes. It works for both node and link failures Our solution has two parts: first cause the surviving digital cross connects to agree on the topology (i e., what is up and what is down) and second, based on the agreed topology, reconfigure the digital cross connect nodes to restore as much call-carrying capacity as possible.","PeriodicalId":277204,"journal":{"name":"International Symposium on Switching","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129017669","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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