Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563862
A. D. Giglio, Giovanni Di Giorgio, M. Quagliotti
The aim of this paper is the analysis and the comparison of different resilience schemes in an IP over optical transport network. The properties which differentiate the resilience schemes considered in this work are: static vs. dynamic, with vs. without interaction between layers, relying vs. not relying on a common pool of back-up resources. The comparison has been performed from both an economic and a reliability performance viewpoint. The results obtained on a realistic case study show that the most advanced scheme (dynamic multilayer with common pool) allows interesting savings on resources and consequently costs. At the same it retains a network availability which is very close (practically equivalent) to the availability of static and more expensive schemes.
{"title":"Cost and reliability comparison of some static and dynamic multilayer resilience schemes","authors":"A. D. Giglio, Giovanni Di Giorgio, M. Quagliotti","doi":"10.1109/DRCN.2005.1563862","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563862","url":null,"abstract":"The aim of this paper is the analysis and the comparison of different resilience schemes in an IP over optical transport network. The properties which differentiate the resilience schemes considered in this work are: static vs. dynamic, with vs. without interaction between layers, relying vs. not relying on a common pool of back-up resources. The comparison has been performed from both an economic and a reliability performance viewpoint. The results obtained on a realistic case study show that the most advanced scheme (dynamic multilayer with common pool) allows interesting savings on resources and consequently costs. At the same it retains a network availability which is very close (practically equivalent) to the availability of static and more expensive schemes.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131690293","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563922
J. Pedersen, T. Riaz, T. P. Knudsen, O. Madsen
An architecture is proposed for designing broadband access networks, which offer triple redundancy to the end users, resulting in networks providing connectivity even in case of any two independent node or line failures. Two physically independent connections are offered by fiber, and the last provided by some wireless solution. Based on experience with planning Fiber To The Home, the architecture is designed to meet a number of demands, making it practicable and useful in real-world network planning. The proposed wired topology is planar, and suitable for being fitted onto the road network without compromising line independency, and it can be implemented step-wise, the first step being based on a simple ring/tree topology. The double ring is used for the distribution network, ensuring 3-connectivity and making it feasible to use for connecting the base stations of the wireless network. Another advantage of using the double ring is that it allows for embedding other more advanced topologies such as the generalized Petersen graphs without changing ducts and placement of nodes.
{"title":"Designing broadband access networks with triple redundancy","authors":"J. Pedersen, T. Riaz, T. P. Knudsen, O. Madsen","doi":"10.1109/DRCN.2005.1563922","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563922","url":null,"abstract":"An architecture is proposed for designing broadband access networks, which offer triple redundancy to the end users, resulting in networks providing connectivity even in case of any two independent node or line failures. Two physically independent connections are offered by fiber, and the last provided by some wireless solution. Based on experience with planning Fiber To The Home, the architecture is designed to meet a number of demands, making it practicable and useful in real-world network planning. The proposed wired topology is planar, and suitable for being fitted onto the road network without compromising line independency, and it can be implemented step-wise, the first step being based on a simple ring/tree topology. The double ring is used for the distribution network, ensuring 3-connectivity and making it feasible to use for connecting the base stations of the wireless network. Another advantage of using the double ring is that it allows for embedding other more advanced topologies such as the generalized Petersen graphs without changing ducts and placement of nodes.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129187220","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563851
M. Herzberg, F. Shleifer, R. Ring, O. Zolberg
The paper applies the generic Cycleoriented approach to multi-domain, multi-service survivable networks in order to reach a balance between the grade of survivability for the various services to be supported and the efficient use of valuable transport resources in compound, nonhomogenous, networks. We denote gateways as common nodes of two or more domains that allow inter-domain traffic to pass through. As a consequence, gateways are part of the origindestination cycles associated with inter-domain survivable traffic. New route-diverse cycle parts, named Y and X, are defined to derive inter-domain cycles for cases where two gateways are shared between neighboring domains. Transport mechanisms such as Dual-Ring Interchange at gateways and Dual-Node Interchange between gateways can be incorporated to cope with independent multi-failure scenarios by limiting a single failure to its own network domain.
{"title":"Applying the cycle-oriented approach to multi-domain, multi-service survivable networks","authors":"M. Herzberg, F. Shleifer, R. Ring, O. Zolberg","doi":"10.1109/DRCN.2005.1563851","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563851","url":null,"abstract":"The paper applies the generic Cycleoriented approach to multi-domain, multi-service survivable networks in order to reach a balance between the grade of survivability for the various services to be supported and the efficient use of valuable transport resources in compound, nonhomogenous, networks. We denote gateways as common nodes of two or more domains that allow inter-domain traffic to pass through. As a consequence, gateways are part of the origindestination cycles associated with inter-domain survivable traffic. New route-diverse cycle parts, named Y and X, are defined to derive inter-domain cycles for cases where two gateways are shared between neighboring domains. Transport mechanisms such as Dual-Ring Interchange at gateways and Dual-Node Interchange between gateways can be incorporated to cope with independent multi-failure scenarios by limiting a single failure to its own network domain.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115996032","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563876
Yu Liu, D. Tipper, K. Vajanapoom
In this paper, we consider the problem of provisioning spare capacity in multi-layer backbone networks in order to meet survivability requirements. A matrix based model is presented showing how failure propagation can be mapped across network layers. Two different multilayer spare capacity allocation optimization problems are formulated utilizing the failure propagation matrix to determine the location and amount of spare capacity in each network layer. In order to scale the models a fast and efficient approximation algorithm based on our early successive survivable routing (SSR) technique is developed. Numerical results for a variety of networks show that near optimal solutions are found by the proposed heuristic algorithm.
{"title":"Spare capacity allocation in multi-layer networks","authors":"Yu Liu, D. Tipper, K. Vajanapoom","doi":"10.1109/DRCN.2005.1563876","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563876","url":null,"abstract":"In this paper, we consider the problem of provisioning spare capacity in multi-layer backbone networks in order to meet survivability requirements. A matrix based model is presented showing how failure propagation can be mapped across network layers. Two different multilayer spare capacity allocation optimization problems are formulated utilizing the failure propagation matrix to determine the location and amount of spare capacity in each network layer. In order to scale the models a fast and efficient approximation algorithm based on our early successive survivable routing (SSR) technique is developed. Numerical results for a variety of networks show that near optimal solutions are found by the proposed heuristic algorithm.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127101746","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563848
S. Verbrugge, D. Colle, P. Demeester, R. Huelsermann, M. Jaeger
This paper reports the initiative taken within the IST-project NOBEL to define a general availability model and collect general availability numbers for several network equipment types, independent from vendor specific product information. The model includes optical layer equipment as well as IP and SDH equipment, described using a triplet-representation for each of the availability measures with optimistic, nominal and conservative values. The availability model has been applied to different typical transport network scenarios. Several case studies were performed to compare the end-to-end connection availability and the required network capacity for different resilience mechanisms.
{"title":"General availability model for multilayer transport networks","authors":"S. Verbrugge, D. Colle, P. Demeester, R. Huelsermann, M. Jaeger","doi":"10.1109/DRCN.2005.1563848","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563848","url":null,"abstract":"This paper reports the initiative taken within the IST-project NOBEL to define a general availability model and collect general availability numbers for several network equipment types, independent from vendor specific product information. The model includes optical layer equipment as well as IP and SDH equipment, described using a triplet-representation for each of the availability measures with optimistic, nominal and conservative values. The availability model has been applied to different typical transport network scenarios. Several case studies were performed to compare the end-to-end connection availability and the required network capacity for different resilience mechanisms.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126894150","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563883
Guangzhi Li, A. Chiu, J. Strand
After many years of research and industry efforts, ultra long haul (ULH) technologies for DWDM transport are maturing, and carriers are deploying such technology for high capacity and capital savings. Unlike opaque optical networks, how best to recover an all-optical ULH network after failure is still uncertain. This paper analyzes four recovery schemes in this area ranging from restoration speed and restoration cost. Our results suggest that the proposed hot-standby scheme would benefit from both fast restoration and cost efficiency comparing to other schemes.
{"title":"Failure recovery in all-optical ULH networks","authors":"Guangzhi Li, A. Chiu, J. Strand","doi":"10.1109/DRCN.2005.1563883","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563883","url":null,"abstract":"After many years of research and industry efforts, ultra long haul (ULH) technologies for DWDM transport are maturing, and carriers are deploying such technology for high capacity and capital savings. Unlike opaque optical networks, how best to recover an all-optical ULH network after failure is still uncertain. This paper analyzes four recovery schemes in this area ranging from restoration speed and restoration cost. Our results suggest that the proposed hot-standby scheme would benefit from both fast restoration and cost efficiency comparing to other schemes.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126090316","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563865
R. Clemente, M. Bartoli, Andrea Del Pistoia, G. D'Orazio, Bruno Giovanni Pennestrì
Long-distance IP networks are becoming the universal infrastructure to carry all the communication services. Having these services different assurance requirements, in terms of availability and serve-ability, IP networks must offer both carrier-class and lower quality availability levels. This paper investigates possible strategies that allow reaching these goals, specifically analyzing the cost/benefit ratio of each strategy. In doing that we pay attention to solutions that can be applied to present state-of-the art IP over Optics networks.
{"title":"Short term strategies for carrier class IP over optics network","authors":"R. Clemente, M. Bartoli, Andrea Del Pistoia, G. D'Orazio, Bruno Giovanni Pennestrì","doi":"10.1109/DRCN.2005.1563865","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563865","url":null,"abstract":"Long-distance IP networks are becoming the universal infrastructure to carry all the communication services. Having these services different assurance requirements, in terms of availability and serve-ability, IP networks must offer both carrier-class and lower quality availability levels. This paper investigates possible strategies that allow reaching these goals, specifically analyzing the cost/benefit ratio of each strategy. In doing that we pay attention to solutions that can be applied to present state-of-the art IP over Optics networks.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131823376","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563881
A. Kankkunen
Today's communications service providers are under increasing pressure to take advantage of the lower costs and increased flexibility of a unified Internet protocol (IP)-based communications network. Today there is no doubt that network elements based on IP can provide reduced costs, converge multiple network services, and collapse communications layers into a common IP/MPLS based network backbone. However, end-users have become accustomed to service quality expectations developed over the course of decades based on the circuit-switched communications network for their basic communication needs. Quality of Service schemes developed by industry standards bodies and router technology vendors, while important to meeting the quality expectations of customers, are alone insufficient to provide a satisfactory customer experience. The crux of the problem is that the routing equipment deployed by carriers today in the public network are based on routing equipment developed for enterprise applications. Enterprises have valued data integrity and fast system recovery as opposed to a standard of always-on/never down, carrier-class reliability. Enterprise applications are tolerant of routine, non-trivial, downtime maintenance windows, a concept alien to the public network downtime goals. The public network requires continuous operation, where routine maintenance is designed to occur without downtime. This paper examines the needs of service providers as it relates to meeting and exceeding customer satisfaction levels by offering high availability solutions based on applying non-service affecting upgrade capabilities, or service assured upgrade capabilities, to the new class of data routers used in service provider networks. With a service assured upgrade, service providers can ensure that software-related maintenance upgrades do not adversely affect their existing revenue stream. With the service assured upgrade, service providers can make changes to their network infrastructure with minimal disruption to their end-customer traffic. This paper defines the parameters that influence the network availability and looks at how service assured upgrades can help address outage concerns during software maintenance. It discusses the objectives and requirements for performing a service assured software upgrade and the steps taken to complete the software upgrade process. Finally, to truly appreciate the benefits of service assured software upgrade, a comparison is made with the existing software upgrade solutions offered today by the current generation of routers.
{"title":"Non-service affecting software upgrades for multi-service routers","authors":"A. Kankkunen","doi":"10.1109/DRCN.2005.1563881","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563881","url":null,"abstract":"Today's communications service providers are under increasing pressure to take advantage of the lower costs and increased flexibility of a unified Internet protocol (IP)-based communications network. Today there is no doubt that network elements based on IP can provide reduced costs, converge multiple network services, and collapse communications layers into a common IP/MPLS based network backbone. However, end-users have become accustomed to service quality expectations developed over the course of decades based on the circuit-switched communications network for their basic communication needs. Quality of Service schemes developed by industry standards bodies and router technology vendors, while important to meeting the quality expectations of customers, are alone insufficient to provide a satisfactory customer experience. The crux of the problem is that the routing equipment deployed by carriers today in the public network are based on routing equipment developed for enterprise applications. Enterprises have valued data integrity and fast system recovery as opposed to a standard of always-on/never down, carrier-class reliability. Enterprise applications are tolerant of routine, non-trivial, downtime maintenance windows, a concept alien to the public network downtime goals. The public network requires continuous operation, where routine maintenance is designed to occur without downtime. This paper examines the needs of service providers as it relates to meeting and exceeding customer satisfaction levels by offering high availability solutions based on applying non-service affecting upgrade capabilities, or service assured upgrade capabilities, to the new class of data routers used in service provider networks. With a service assured upgrade, service providers can ensure that software-related maintenance upgrades do not adversely affect their existing revenue stream. With the service assured upgrade, service providers can make changes to their network infrastructure with minimal disruption to their end-customer traffic. This paper defines the parameters that influence the network availability and looks at how service assured upgrades can help address outage concerns during software maintenance. It discusses the objectives and requirements for performing a service assured software upgrade and the steps taken to complete the software upgrade process. Finally, to truly appreciate the benefits of service assured software upgrade, a comparison is made with the existing software upgrade solutions offered today by the current generation of routers.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123334998","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563906
P. Hargrave
The architecture of Next Generation Networks necessitates the adoption of new approaches to ensuring the reliability of these networks and the services they offer. The more distributed nature of network elements, as compared with legacy networks, can be advantageously exploited through the use of techniques such as continuous fault monitoring and automatic rerouting, leading to new approaches to recovery following equipment failure. NGNs have inherently different behaviours under overload and therefore also require new approaches to ensuring Quality and Grade of Service through, for example, appropriately managed packet classification and handling. Coupled with sophisticated server redundancy mechanisms and a layered approach to security, these techniques can be used to complement each other and ensure that NGNs can provide truly 'ReHlable Networks for Reliable Services'. I. NEXT GENERATION NETWORKS The accelerating deployment of Next Generation Networks (NGNs) represents a tipping point in the way communications services are delivered. As shown in Figure 1, a defining characteristic of such networks is that they are based around optical cores that carry Internet Protocol (IP) packets and provide connectivity independent of service. Services are no longer inextricably linked with separate infrastructures. Instead, they are the provided via computing servers linked to these common cores. NGNs also provide services that are independent of the access method that is used. Whether such access be fixed, mobile or via hotspots, it is simply the means by which end users connect to the packet core networks, and thereby access the servers and communicate with each other. The major service providers are now deploying their own distinct NGNs with carrier class capabilities. NGNs offer the potential of substantial cost savings to operators. They enable the delivery of innovative new services, with the potential for far greater control and personalisation by end users. Service innovation can be at the network edge, and therefore beyond the control of the network
{"title":"Next generation networks - design for reliability","authors":"P. Hargrave","doi":"10.1109/DRCN.2005.1563906","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563906","url":null,"abstract":"The architecture of Next Generation Networks necessitates the adoption of new approaches to ensuring the reliability of these networks and the services they offer. The more distributed nature of network elements, as compared with legacy networks, can be advantageously exploited through the use of techniques such as continuous fault monitoring and automatic rerouting, leading to new approaches to recovery following equipment failure. NGNs have inherently different behaviours under overload and therefore also require new approaches to ensuring Quality and Grade of Service through, for example, appropriately managed packet classification and handling. Coupled with sophisticated server redundancy mechanisms and a layered approach to security, these techniques can be used to complement each other and ensure that NGNs can provide truly 'ReHlable Networks for Reliable Services'. I. NEXT GENERATION NETWORKS The accelerating deployment of Next Generation Networks (NGNs) represents a tipping point in the way communications services are delivered. As shown in Figure 1, a defining characteristic of such networks is that they are based around optical cores that carry Internet Protocol (IP) packets and provide connectivity independent of service. Services are no longer inextricably linked with separate infrastructures. Instead, they are the provided via computing servers linked to these common cores. NGNs also provide services that are independent of the access method that is used. Whether such access be fixed, mobile or via hotspots, it is simply the means by which end users connect to the packet core networks, and thereby access the servers and communicate with each other. The major service providers are now deploying their own distinct NGNs with carrier class capabilities. NGNs offer the potential of substantial cost savings to operators. They enable the delivery of innovative new services, with the potential for far greater control and personalisation by end users. Service innovation can be at the network edge, and therefore beyond the control of the network","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132997067","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}
Pub Date : 2005-12-27DOI: 10.1109/DRCN.2005.1563846
Yuji Shinozaki, M. Katayama, Hiroki Yamada
Network reliability consists of the reliability of nodes and links. This paper focuses on node reliability. Nodes have applied reconfigurable technology to improve their functions. This technology can bring flexibility by making the configuration data of a function easy to change. Using this feature, this technology is applied to network nodes that provide high-speed packet-processing such as packet classification on a high-speed network interface. This paper describes the application of reconfiguration technology to enhance the reliability of packet processing nodes. The conventional redundant method requires an increase in the number of spare boards to raise system reliability, so it has a high equipment cost in exchange for high reliability. To solve this problem, we propose bidirectional shared serial N + k redundancy as a new redundant method. This can reduce the number of spare boards required and increase the recovery patterns for board failure. By evaluating system reliability, we show that our method can enhance the reliability of equipment better than the conventional method. Thus, this proposed method can attain high reliability and node miniaturization by means of reconfigurable technology and will lead to better network reliability.
{"title":"High-reliability network system architecture using dynamic reconfigurable technology","authors":"Yuji Shinozaki, M. Katayama, Hiroki Yamada","doi":"10.1109/DRCN.2005.1563846","DOIUrl":"https://doi.org/10.1109/DRCN.2005.1563846","url":null,"abstract":"Network reliability consists of the reliability of nodes and links. This paper focuses on node reliability. Nodes have applied reconfigurable technology to improve their functions. This technology can bring flexibility by making the configuration data of a function easy to change. Using this feature, this technology is applied to network nodes that provide high-speed packet-processing such as packet classification on a high-speed network interface. This paper describes the application of reconfiguration technology to enhance the reliability of packet processing nodes. The conventional redundant method requires an increase in the number of spare boards to raise system reliability, so it has a high equipment cost in exchange for high reliability. To solve this problem, we propose bidirectional shared serial N + k redundancy as a new redundant method. This can reduce the number of spare boards required and increase the recovery patterns for board failure. By evaluating system reliability, we show that our method can enhance the reliability of equipment better than the conventional method. Thus, this proposed method can attain high reliability and node miniaturization by means of reconfigurable technology and will lead to better network reliability.","PeriodicalId":415896,"journal":{"name":"DRCN 2005). Proceedings.5th International Workshop on Design of Reliable Communication Networks, 2005.","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132277649","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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