Pub Date : 2012-04-17DOI: 10.1109/ONDM.2012.6210185
R. Veisllari, S. Bjornstad, N. Stol
Integrated hybrid optical packet/circuit switched architectures enable networks with the guaranteed service transport (GST) of circuit switching and the statistical multiplexing known from packet switching. The utilization of the optical lightpaths is increased by inserting low priority statistically multiplexed (SM) traffic in the guaranteed circuit switched traffic gaps. Previous studies of these nodes have used optical packet switches together with reservation techniques to minimize the SM packet losses while giving absolute priority to circuit switched traffic. In this paper we propose a novel scheduling technique that applies electronic buffers and multiple queues to find a suitable SM packet to fit in a GST gap. Additionally, two schemes of managing the output buffer are introduced, the dedicated queue per input and the length-aware buffering. Simulation results demonstrate that their combination significantly increases the utilization of the available capacity and the maximum rate of SM traffic inserted in the network.
{"title":"Scheduling techniques in an integrated hybrid node with electronic buffers","authors":"R. Veisllari, S. Bjornstad, N. Stol","doi":"10.1109/ONDM.2012.6210185","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210185","url":null,"abstract":"Integrated hybrid optical packet/circuit switched architectures enable networks with the guaranteed service transport (GST) of circuit switching and the statistical multiplexing known from packet switching. The utilization of the optical lightpaths is increased by inserting low priority statistically multiplexed (SM) traffic in the guaranteed circuit switched traffic gaps. Previous studies of these nodes have used optical packet switches together with reservation techniques to minimize the SM packet losses while giving absolute priority to circuit switched traffic. In this paper we propose a novel scheduling technique that applies electronic buffers and multiple queues to find a suitable SM packet to fit in a GST gap. Additionally, two schemes of managing the output buffer are introduced, the dedicated queue per input and the length-aware buffering. Simulation results demonstrate that their combination significantly increases the utilization of the available capacity and the maximum rate of SM traffic inserted in the network.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122091830","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210218
M. V. D. Wee, K. Casier, Karel Bauters, S. Verbrugge, D. Colle, M. Pickavet
Telecommunications is a domain that is characterized by a constant and rapid evolution. The available bandwidth keeps on increasing as the amount and quality of the offered services grows almost continuously, and it is generally accepted that upgrades towards Fiber-to-the-Home (FTTH) are necessary. FTTH comes in a plentitude of variations, mainly differing between Point-to-Point and Point-to-Multipoint solutions. Several techno-economic calculations comparing these options are available in literature today, but they lack a generic structured calculation and never focus on the impact of the size of the area and population density on the cost of deployment and operations of an FTTH network. This paper will present a flexible, generic model for techno-economic evaluation of an FTTH network that compares different solutions considering equipment type and placement for a broad range of population densities. The outcome of the simulations proofs the versatility of the generic techno-economic calculation approach and show the impact of the tradeoff in equipment placement and distance to the central office.
{"title":"A modular and hierarchically structured techno-economic model for FTTH deployments Comparison of technology and equipment placement as function of population density and number of flexibility points","authors":"M. V. D. Wee, K. Casier, Karel Bauters, S. Verbrugge, D. Colle, M. Pickavet","doi":"10.1109/ONDM.2012.6210218","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210218","url":null,"abstract":"Telecommunications is a domain that is characterized by a constant and rapid evolution. The available bandwidth keeps on increasing as the amount and quality of the offered services grows almost continuously, and it is generally accepted that upgrades towards Fiber-to-the-Home (FTTH) are necessary. FTTH comes in a plentitude of variations, mainly differing between Point-to-Point and Point-to-Multipoint solutions. Several techno-economic calculations comparing these options are available in literature today, but they lack a generic structured calculation and never focus on the impact of the size of the area and population density on the cost of deployment and operations of an FTTH network. This paper will present a flexible, generic model for techno-economic evaluation of an FTTH network that compares different solutions considering equipment type and placement for a broad range of population densities. The outcome of the simulations proofs the versatility of the generic techno-economic calculation approach and show the impact of the tradeoff in equipment placement and distance to the central office.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116813989","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210206
Ulrich Menne, C. Raack, R. Wessäly, D. Kharitonov
In this paper, we study the influence of technology, traffic properties and price trends on the optimized design of a reference IP-over-WDM network with rich underlying fiber topology. In each network node, we investigate the optimal degree of traffic switching in an optical (lambda) domain versus an electrical (packet) domain, also known as measure of node transparency. This measure is studied in connection to changes in traffic volume and distribution, optical circuit speeds and equipment cost. By applying variable design constraints, we assess the relative roles of the two distinct equipment groups, IP routers and optical cross-connects, with respect to resulting changes in cost-sensitive network architectures.
{"title":"Optimal degree of optical circuit switching in IP-over-WDM networks","authors":"Ulrich Menne, C. Raack, R. Wessäly, D. Kharitonov","doi":"10.1109/ONDM.2012.6210206","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210206","url":null,"abstract":"In this paper, we study the influence of technology, traffic properties and price trends on the optimized design of a reference IP-over-WDM network with rich underlying fiber topology. In each network node, we investigate the optimal degree of traffic switching in an optical (lambda) domain versus an electrical (packet) domain, also known as measure of node transparency. This measure is studied in connection to changes in traffic volume and distribution, optical circuit speeds and equipment cost. By applying variable design constraints, we assess the relative roles of the two distinct equipment groups, IP routers and optical cross-connects, with respect to resulting changes in cost-sensitive network architectures.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128295959","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210270
A. Pagès, J. Perelló, S. Spadaro
The spectrum-sliced elastic optical path network (SLICE) architecture has been presented as an efficient solution for flexible bandwidth allocation in optical networks. An homologous problem to the classical Routing and Wavelength Assignment (RWA) arises in such an architecture, called Routing and Spectrum Assignment (RSA). Imposed by current transmission technologies enabling the elastic optical network concept, the spectrum contiguity constraint must be ensured in the RSA problem, meaning that the bandwidth requested by any connection must be allocated over a contiguous portion of the spectrum along the path between source and destination nodes. In a dynamic network scenario, where incoming connections are established and disconnected in a quite random fashion, spectral resources tend to be highly fragmented, preventing the allocation of large contiguous spectrum portions for high data-rate connection requests. As a result, high data-rate connections experience unfairly increased bocking probability in contrast to low data-rate ones. In view of this, the present article proposes a lightpath fragmentation mechanism that makes use of the idle transponders in the source node of a high data-rate connection request to fragment it into multiple low data-rate ones, more easily allocable in the network. Besides, aiming to support such an operation, a light-weight RSA algorithm is also proposed so as to properly allocate the generated lightpath fragments over the spectrum. Benefits of the proposed approach are quantified through extensive simulations, showing drastically reduced high data-rate connection blocking probability compared to a usual contiguous bandwidth allocation, while keeping the performance of low data-rate requests to similar levels.
{"title":"Lightpath fragmentation for efficient spectrum utilization in dynamic elastic optical networks","authors":"A. Pagès, J. Perelló, S. Spadaro","doi":"10.1109/ONDM.2012.6210270","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210270","url":null,"abstract":"The spectrum-sliced elastic optical path network (SLICE) architecture has been presented as an efficient solution for flexible bandwidth allocation in optical networks. An homologous problem to the classical Routing and Wavelength Assignment (RWA) arises in such an architecture, called Routing and Spectrum Assignment (RSA). Imposed by current transmission technologies enabling the elastic optical network concept, the spectrum contiguity constraint must be ensured in the RSA problem, meaning that the bandwidth requested by any connection must be allocated over a contiguous portion of the spectrum along the path between source and destination nodes. In a dynamic network scenario, where incoming connections are established and disconnected in a quite random fashion, spectral resources tend to be highly fragmented, preventing the allocation of large contiguous spectrum portions for high data-rate connection requests. As a result, high data-rate connections experience unfairly increased bocking probability in contrast to low data-rate ones. In view of this, the present article proposes a lightpath fragmentation mechanism that makes use of the idle transponders in the source node of a high data-rate connection request to fragment it into multiple low data-rate ones, more easily allocable in the network. Besides, aiming to support such an operation, a light-weight RSA algorithm is also proposed so as to properly allocate the generated lightpath fragments over the spectrum. Benefits of the proposed approach are quantified through extensive simulations, showing drastically reduced high data-rate connection blocking probability compared to a usual contiguous bandwidth allocation, while keeping the performance of low data-rate requests to similar levels.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127537543","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210271
M. Garrich, N. A. Gonzalez, G. Zervas, P. Giaccone, D. Simeonidou
The optical cross-connect (OXC) is a key element in current WDM networks. In this context, the design of OXCs is becoming very challenging since it has to fulfil requirements from legacy optical networks and be future-proof to support both legacy lower bitrates and future high-speed super-channels by means of flexible allocation of spectral resources. In this paper we review the novel concept of Architecture on Demand (AoD) to dynamically synthesise architectures suited to the switching and processing requirements of traffic. We propose a technique suited to perform architecture computation and composition and discuss the scalability of the proposed technique. Results show that it is possible to reduce the number of hardware modules used at least by half compared to other conventional architectures.
{"title":"Architecture on Demand: Synthesis and scalability","authors":"M. Garrich, N. A. Gonzalez, G. Zervas, P. Giaccone, D. Simeonidou","doi":"10.1109/ONDM.2012.6210271","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210271","url":null,"abstract":"The optical cross-connect (OXC) is a key element in current WDM networks. In this context, the design of OXCs is becoming very challenging since it has to fulfil requirements from legacy optical networks and be future-proof to support both legacy lower bitrates and future high-speed super-channels by means of flexible allocation of spectral resources. In this paper we review the novel concept of Architecture on Demand (AoD) to dynamically synthesise architectures suited to the switching and processing requirements of traffic. We propose a technique suited to perform architecture computation and composition and discuss the scalability of the proposed technique. Results show that it is possible to reduce the number of hardware modules used at least by half compared to other conventional architectures.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127371453","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210210
M. Anastasopoulos, A. Tzanakaki
This paper focuses on integrated optical network and IT infrastructures in support of the Future Internet and its new emerging applications. In this context, the concept of virtualization of the physical infrastructure is proposed and the process of virtual infrastructure planning is discussed. A novel optimization scheme suitable to adaptively plan virtual infrastructures employing evolutionary game theory is presented and compared to conventional centralized approaches. Our evolutionary game theory modelling results clearly show, that given sufficient time to learn the status of the underlying physical topology the virtual infrastructures planned have similar performance to those generated through traditional global optimization approaches such as integer linear programming.
{"title":"Adaptive virtual infrastructure planning over interconnected IT and optical network resources using evolutionary game theory","authors":"M. Anastasopoulos, A. Tzanakaki","doi":"10.1109/ONDM.2012.6210210","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210210","url":null,"abstract":"This paper focuses on integrated optical network and IT infrastructures in support of the Future Internet and its new emerging applications. In this context, the concept of virtualization of the physical infrastructure is proposed and the process of virtual infrastructure planning is discussed. A novel optimization scheme suitable to adaptively plan virtual infrastructures employing evolutionary game theory is presented and compared to conventional centralized approaches. Our evolutionary game theory modelling results clearly show, that given sufficient time to learn the status of the underlying physical topology the virtual infrastructures planned have similar performance to those generated through traditional global optimization approaches such as integer linear programming.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123384761","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210202
T. Orphanoudakis, A. Drakos, A. Stavdas
In this work we benchmark through appropriate performance metrics the legacy Optical Circuit Switching (OCS) mode in an optical network of nodes following a mesh topology interconnection vs. a clustered optical network architecture (CANON). The results demonstrate that the static reservation of WDM channels, as used in IP/WDM schemes, is severely limiting scalability, since it cannot efficiently adapt to the dynamic traffic fluctuations that are frequently observed in today's networks, while the hierarchical clustered architecture with dynamic reservations can exploit statistical multiplexing efficient grooming traffic at appropriate granularity levels leading to improved performance and resource utilization. We quantify through computer simulation the performance gains and the smoothing of traffic profile achieved when implementing the CANON architecture as an upgrade of existing infrastructure by using the reference network of a European operator. The effect of traffic grooming, when employing CANON and its impact on performance and cost are evaluated using a national backbone network as a case study.
{"title":"Impact of node clustering on network cost and resource utilization","authors":"T. Orphanoudakis, A. Drakos, A. Stavdas","doi":"10.1109/ONDM.2012.6210202","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210202","url":null,"abstract":"In this work we benchmark through appropriate performance metrics the legacy Optical Circuit Switching (OCS) mode in an optical network of nodes following a mesh topology interconnection vs. a clustered optical network architecture (CANON). The results demonstrate that the static reservation of WDM channels, as used in IP/WDM schemes, is severely limiting scalability, since it cannot efficiently adapt to the dynamic traffic fluctuations that are frequently observed in today's networks, while the hierarchical clustered architecture with dynamic reservations can exploit statistical multiplexing efficient grooming traffic at appropriate granularity levels leading to improved performance and resource utilization. We quantify through computer simulation the performance gains and the smoothing of traffic profile achieved when implementing the CANON architecture as an upgrade of existing infrastructure by using the reference network of a European operator. The effect of traffic grooming, when employing CANON and its impact on performance and cost are evaluated using a national backbone network as a case study.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134354181","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210211
N. Fernández, R. Durán, I. Miguel, N. Merayo, D. Sánchez, M. Angelou, J. Aguado, P. Fernández, T. Jiménez, R. Lorenzo, Ioannis Tomkos, E. Abril
“Greening the Internet” is an important research topic in the last years. The Internet capacity and energy consumption have increased, and the utilization of design and operation techniques to reduce this consumption are a must. In this paper, we present a multiobjective genetic algorithm to design virtual topologies for reconfigurable wavelength-routed optical networks with the aim of reducing both the energy consumption and the network congestion while ensuring that the lightpaths of the virtual topologies fulfill quality of transmission requirements. Moreover, we also present another version of that method enhanced with cognitive techniques, and we show, by means of simulation, the performance advantages brought when introducing these cognitive techniques.
{"title":"Cognition to design energetically efficient and impairment aware virtual topologies for optical networks","authors":"N. Fernández, R. Durán, I. Miguel, N. Merayo, D. Sánchez, M. Angelou, J. Aguado, P. Fernández, T. Jiménez, R. Lorenzo, Ioannis Tomkos, E. Abril","doi":"10.1109/ONDM.2012.6210211","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210211","url":null,"abstract":"“Greening the Internet” is an important research topic in the last years. The Internet capacity and energy consumption have increased, and the utilization of design and operation techniques to reduce this consumption are a must. In this paper, we present a multiobjective genetic algorithm to design virtual topologies for reconfigurable wavelength-routed optical networks with the aim of reducing both the energy consumption and the network congestion while ensuring that the lightpaths of the virtual topologies fulfill quality of transmission requirements. Moreover, we also present another version of that method enhanced with cognitive techniques, and we show, by means of simulation, the performance advantages brought when introducing these cognitive techniques.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115301410","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210203
Y. Pointurier
Optical packet switching (OPS), a promising technology for small, high-capacity networks such as metro or regional networks, leverages optical transparency to decrease the number of interfaces to be deployed and the energy consumption of a network when compared with an opaque technology. Based on those principles, ring-based OPS techniques such as POADM (Packet Optical Add-Drop Multiplexers) were proposed in the past. However, many networks that are already deployed are physical meshes. In this paper, we tackle the problem of mapping OPS rings onto physical meshes. We propose meta-heuristic algorithms based on simulated annealing (SA) and a genetic algorithm (GA). The algorithms also determine where backbone/core nodes should be located. The algorithms minimize the cost of the network expressed for instance in terms of optoelectronic conversions. The impact of various physical constraints (maximum ring length, maximum number of wavelengths in a ring) are included and characterized. We show that, for standard physical constraints, a fully opaque Ethernet network requires 50% more optoelectronic devices than the proposed optical packet switching network.
{"title":"Overlaying rings onto a mesh network","authors":"Y. Pointurier","doi":"10.1109/ONDM.2012.6210203","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210203","url":null,"abstract":"Optical packet switching (OPS), a promising technology for small, high-capacity networks such as metro or regional networks, leverages optical transparency to decrease the number of interfaces to be deployed and the energy consumption of a network when compared with an opaque technology. Based on those principles, ring-based OPS techniques such as POADM (Packet Optical Add-Drop Multiplexers) were proposed in the past. However, many networks that are already deployed are physical meshes. In this paper, we tackle the problem of mapping OPS rings onto physical meshes. We propose meta-heuristic algorithms based on simulated annealing (SA) and a genetic algorithm (GA). The algorithms also determine where backbone/core nodes should be located. The algorithms minimize the cost of the network expressed for instance in terms of optoelectronic conversions. The impact of various physical constraints (maximum ring length, maximum number of wavelengths in a ring) are included and characterized. We show that, for standard physical constraints, a fully opaque Ethernet network requires 50% more optoelectronic devices than the proposed optical packet switching network.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116958375","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 : 2012-04-17DOI: 10.1109/ONDM.2012.6210215
E. Pascale, D. Payne, M. Ruffini
Content Distribution currently accounts for the vast majority of Internet traffic. Peer-to-Peer represents a scalable and inexpensive strategy to deliver content to end-customers; unfortunately, it poses a sever strain on the network core and generates high costs for service providers. Locality-aware policies have been proposed to tackle these issues, but their effectiveness is limited by the low probability of finding enough peers with the required content. In this work we evaluate the impact of next-generation optical access networks - and specifically their symmetric bandwidth and customer aggregation features - on the feasibility of locality-aware peer-to-peer content distribution schemes. With the aid of a simulation tool, using parameters taken from real-world traces, we show that core traffic can be greatly reduced with respect to traditional centralized, Content Distribution Network (CDN) or locality-aware asymmetric schemes. Relieving the network from part of this load might allow network operators to reduce the switching electronics required at core and metro nodes, thus lowering capital and operational expenditures. An estimation of the power savings that could be achieved through this process is also presented.
{"title":"Bandwidth and energy savings of locality-aware P2P Content Distribution in next-generation PONs","authors":"E. Pascale, D. Payne, M. Ruffini","doi":"10.1109/ONDM.2012.6210215","DOIUrl":"https://doi.org/10.1109/ONDM.2012.6210215","url":null,"abstract":"Content Distribution currently accounts for the vast majority of Internet traffic. Peer-to-Peer represents a scalable and inexpensive strategy to deliver content to end-customers; unfortunately, it poses a sever strain on the network core and generates high costs for service providers. Locality-aware policies have been proposed to tackle these issues, but their effectiveness is limited by the low probability of finding enough peers with the required content. In this work we evaluate the impact of next-generation optical access networks - and specifically their symmetric bandwidth and customer aggregation features - on the feasibility of locality-aware peer-to-peer content distribution schemes. With the aid of a simulation tool, using parameters taken from real-world traces, we show that core traffic can be greatly reduced with respect to traditional centralized, Content Distribution Network (CDN) or locality-aware asymmetric schemes. Relieving the network from part of this load might allow network operators to reduce the switching electronics required at core and metro nodes, thus lowering capital and operational expenditures. An estimation of the power savings that could be achieved through this process is also presented.","PeriodicalId":151401,"journal":{"name":"2012 16th International Conference on Optical Network Design and Modelling (ONDM)","volume":"1199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121295235","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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