Pub Date : 2016-04-25DOI: 10.1109/NOMS.2016.7502831
A. Sayenko, M. Zolotukhin, T. Hämäläinen
Low power nodes have been a hot topic in research, standardization, and industry communities, which is typically considered under an umbrella term called heterogeneous networking. In this paper, we look at the problem of optimal deployment of low power nodes that could be either small cells connected via the wired backhaul or relays that utilize the same spectrum and the wireless access technology to get connected to the core network. We present that even though both relay and small cell nodes should be located somewhere at the cell edge, their optimal coordinates are not the same since relays have a limitation that comes from a link between a relay and the master base station.
{"title":"On optimal placement of low power nodes for improved performance in heterogeneous networks","authors":"A. Sayenko, M. Zolotukhin, T. Hämäläinen","doi":"10.1109/NOMS.2016.7502831","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502831","url":null,"abstract":"Low power nodes have been a hot topic in research, standardization, and industry communities, which is typically considered under an umbrella term called heterogeneous networking. In this paper, we look at the problem of optimal deployment of low power nodes that could be either small cells connected via the wired backhaul or relays that utilize the same spectrum and the wireless access technology to get connected to the core network. We present that even though both relay and small cell nodes should be located somewhere at the cell edge, their optimal coordinates are not the same since relays have a limitation that comes from a link between a relay and the master base station.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125706447","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502790
Roberto di Lallo, Mirko Gradillo, Gabriele Lospoto, Claudio Pisa, M. Rimondini
Software-Defined Networking (SDN) is a de-facto established approach that separates the packet switching functions of a device from its operational logic, which is controlled by a piece of software. Due to its potential for realizing new network architectures and services, a whole thread of scientific literature is devoted to SDN and its most adopted incarnation, OpenFlow. However, limited attention has been put in verifying the viability of the proposed approaches on currently available hardware. We address this deficiency through the following contributions: i) a critical review of the literature about SDN in terms of applicability issues stemming from publicly documented limitations of OpenFlow implementations; ii) a methodology for verifying the support of SDN-related functions in a network device, comprising an OpenFlow compliance test as well as custom targeted tests; iii) an application of the methodology to devices from 7 different vendors, unveiling extensive anomalous behaviors affecting even the most basic features; iv) a discussion of this outcome in terms of relevance of the discovered anomalies and of their implications on the applicability of state-of-the-art contributions on SDN. Besides taking a snapshot of the viability of research results, with this paper we intend to highlight aspects that operators should consider when picking SDN devices.
{"title":"On the practical applicability of SDN research","authors":"Roberto di Lallo, Mirko Gradillo, Gabriele Lospoto, Claudio Pisa, M. Rimondini","doi":"10.1109/NOMS.2016.7502790","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502790","url":null,"abstract":"Software-Defined Networking (SDN) is a de-facto established approach that separates the packet switching functions of a device from its operational logic, which is controlled by a piece of software. Due to its potential for realizing new network architectures and services, a whole thread of scientific literature is devoted to SDN and its most adopted incarnation, OpenFlow. However, limited attention has been put in verifying the viability of the proposed approaches on currently available hardware. We address this deficiency through the following contributions: i) a critical review of the literature about SDN in terms of applicability issues stemming from publicly documented limitations of OpenFlow implementations; ii) a methodology for verifying the support of SDN-related functions in a network device, comprising an OpenFlow compliance test as well as custom targeted tests; iii) an application of the methodology to devices from 7 different vendors, unveiling extensive anomalous behaviors affecting even the most basic features; iv) a discussion of this outcome in terms of relevance of the discovered anomalies and of their implications on the applicability of state-of-the-art contributions on SDN. Besides taking a snapshot of the viability of research results, with this paper we intend to highlight aspects that operators should consider when picking SDN devices.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129945769","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502900
M. Tortonesi, James R. Michaelis, Niranjan Suri, Michael A. Baker
In the near term, a multitude of IoT applications are expected, each taking advantage of heterogeneous device collections ranging from environmental sensors to smartphones. However, approaches taken in many IoT systems - based on the paradigm of Cloud computing - face challenges of both high latency and network utilization. A clear demand now exists for new paradigms to facilitate IoT application usage of computational resources at the edge of the network for data analysis purposes, as well as smart dissemination solutions to deliver information to consumers. This paper presents SPF (Sieve, Process, and Forward), a Software Defined Networking (SDN) solution for creating and managing IoT applications and services. By leveraging programmable information processors deployed at the Internet/IoT edge, the SDN approach introduced by SPF represents a promising architecture for future urban computing applications.
{"title":"Software-defined and value-based information processing and dissemination in IoT applications","authors":"M. Tortonesi, James R. Michaelis, Niranjan Suri, Michael A. Baker","doi":"10.1109/NOMS.2016.7502900","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502900","url":null,"abstract":"In the near term, a multitude of IoT applications are expected, each taking advantage of heterogeneous device collections ranging from environmental sensors to smartphones. However, approaches taken in many IoT systems - based on the paradigm of Cloud computing - face challenges of both high latency and network utilization. A clear demand now exists for new paradigms to facilitate IoT application usage of computational resources at the edge of the network for data analysis purposes, as well as smart dissemination solutions to deliver information to consumers. This paper presents SPF (Sieve, Process, and Forward), a Software Defined Networking (SDN) solution for creating and managing IoT applications and services. By leveraging programmable information processors deployed at the Internet/IoT edge, the SDN approach introduced by SPF represents a promising architecture for future urban computing applications.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129219331","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502919
Yusu Zhao, Pengfei Zhang, Yaohui Jin
Network troubleshooting is always a tough and daunting task for network operators to struggle with, due to difficultly observed network state, large network size and limited tools such as ping and traceroute. Software-defined networking (SDN) brings us the centralized network control and the customized network management over the entire network, which enables new ways of network troubleshooting. Previous efforts focus on static checking, passive monitoring and active probing, which rely on scraping rules from either controller or network devices. Since those rules describe the actions supposed to be performed on packets, the actions having been performed on packets can be different. We propose the concept of packet behavior to describe the real changes of packets and highlight its importance towards network troubleshooting. Based on the novel approach of exporting packet behavior and flow rules via copies triggered by probes being actively sent, we present the design of Netography system and illustrate the procedures of troubleshooting tasks regarding forwarding errors as well as performance degradation caused by non-tenant-contention reasons. We implement a prototype and verify our system on a small deployment with three typical use cases.
{"title":"Netography: Troubleshoot your network with packet behavior in SDN","authors":"Yusu Zhao, Pengfei Zhang, Yaohui Jin","doi":"10.1109/NOMS.2016.7502919","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502919","url":null,"abstract":"Network troubleshooting is always a tough and daunting task for network operators to struggle with, due to difficultly observed network state, large network size and limited tools such as ping and traceroute. Software-defined networking (SDN) brings us the centralized network control and the customized network management over the entire network, which enables new ways of network troubleshooting. Previous efforts focus on static checking, passive monitoring and active probing, which rely on scraping rules from either controller or network devices. Since those rules describe the actions supposed to be performed on packets, the actions having been performed on packets can be different. We propose the concept of packet behavior to describe the real changes of packets and highlight its importance towards network troubleshooting. Based on the novel approach of exporting packet behavior and flow rules via copies triggered by probes being actively sent, we present the design of Netography system and illustrate the procedures of troubleshooting tasks regarding forwarding errors as well as performance degradation caused by non-tenant-contention reasons. We implement a prototype and verify our system on a small deployment with three typical use cases.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121270648","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7503005
S. Clayman, L. Mamatas, A. Galis
Novel evolutions in the networking world have been proposed under the umbrella of 5G initiatives. The NFV concept is related with the building blocks for virtual networks that are characterized as highly dynamic network environments. SDN performs logically-centralized network control that is decoupled from the data plane, enabling holistic network management. Furthermore, there is a recent trend towards lightweight virtualized network devices and servers bringing significant advantages in terms of adaptability and responsiveness to the network and service environment dynamics. The above paradigms can be combined together, resulting in unprecedented flexibility in Software Defined Infrastructures (SDI) operations. Such unified environments require new efficient and distributed management facilities that are characterized by scalability, reliability, and adaptability to the dynamic conditions in terms of resource availability and changing service and infrastructure requirements. To assist the evaluation of these components, we developed a distributed facility for testing, evaluating, and experimenting with the management of these SDI environments - the Very Lightweight Software-Driven Network and Services Platform (VLSP). It exhibits the following properties: (i) it is a complete integrated management platform for SDI environments; and (ii) it is distributed and scalable, making it suitable for a wide range of topologies and network service deployments.
{"title":"Efficient management solutions for software-defined infrastructures","authors":"S. Clayman, L. Mamatas, A. Galis","doi":"10.1109/NOMS.2016.7503005","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7503005","url":null,"abstract":"Novel evolutions in the networking world have been proposed under the umbrella of 5G initiatives. The NFV concept is related with the building blocks for virtual networks that are characterized as highly dynamic network environments. SDN performs logically-centralized network control that is decoupled from the data plane, enabling holistic network management. Furthermore, there is a recent trend towards lightweight virtualized network devices and servers bringing significant advantages in terms of adaptability and responsiveness to the network and service environment dynamics. The above paradigms can be combined together, resulting in unprecedented flexibility in Software Defined Infrastructures (SDI) operations. Such unified environments require new efficient and distributed management facilities that are characterized by scalability, reliability, and adaptability to the dynamic conditions in terms of resource availability and changing service and infrastructure requirements. To assist the evaluation of these components, we developed a distributed facility for testing, evaluating, and experimenting with the management of these SDI environments - the Very Lightweight Software-Driven Network and Services Platform (VLSP). It exhibits the following properties: (i) it is a complete integrated management platform for SDI environments; and (ii) it is distributed and scalable, making it suitable for a wide range of topologies and network service deployments.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121287555","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502924
P. Velan, Jana Medková, Tomás Jirsík, Pavel Čeleda
Performing research on live network traffic requires the traffic to be well documented and described. The results of such research are heavily dependent on the particular network. This paper presents a study of network characteristics, which can be used to describe the behaviour of a network. We propose a number of characteristics that can be collected from the networks and evaluate them on five different networks of Masaryk University. The proposed characteristics cover IP, transport and application layers of the network traffic. Moreover, they reflect strong day-night and weekday patterns that are present in most of the networks. Variation in the characteristics between the networks indicates that they can be used for the description and differentiation of the networks. Furthermore, a weak correlation between the chosen characteristics implies their independence and contribution to network description.
{"title":"Network traffic characterisation using flow-based statistics","authors":"P. Velan, Jana Medková, Tomás Jirsík, Pavel Čeleda","doi":"10.1109/NOMS.2016.7502924","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502924","url":null,"abstract":"Performing research on live network traffic requires the traffic to be well documented and described. The results of such research are heavily dependent on the particular network. This paper presents a study of network characteristics, which can be used to describe the behaviour of a network. We propose a number of characteristics that can be collected from the networks and evaluate them on five different networks of Masaryk University. The proposed characteristics cover IP, transport and application layers of the network traffic. Moreover, they reflect strong day-night and weekday patterns that are present in most of the networks. Variation in the characteristics between the networks indicates that they can be used for the description and differentiation of the networks. Furthermore, a weak correlation between the chosen characteristics implies their independence and contribution to network description.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122410478","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502832
C. M. Silva, Wagner Meira Jr
In this work we investigate the benefits of an hybrid architecture integrating both mobile roadside units, and stationary roadside units supporting the operation of vehicular networks. Since traffic fluctuates, an architecture employing just stationary roadside units might not be able to properly support the network operation all the time. Similarly, an architecture composed just of mobile roadside units may lack part of the robustness provided by stationary roadside units. Furthermore, the traffic fluctuations are limited by the underlying road network, and the road networks do not change so often as traffic does. Thus, it seems straight full to assume that a set of roadside units will always be left stationary, while other roadside units will need to roam along the road network. As major roads counts on a higher transportation capacity, they tend to be very popular routes, and they are natural candidates for receiving the stationary roadside units. On the other hand, we may rely on mobile roadside units for handling roads presenting a high traffic variation. In this work we use the realistic vehicular mobility trace of Cologne, Germany, and we model the allocation of the roadside units as a Maximum Coverage Problem. Our results demonstrate the hybrid deployment increases the number of covered vehicles up to 45%.
{"title":"An architecture integrating stationary and mobile roadside units for providing communication on intelligent transportation systems","authors":"C. M. Silva, Wagner Meira Jr","doi":"10.1109/NOMS.2016.7502832","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502832","url":null,"abstract":"In this work we investigate the benefits of an hybrid architecture integrating both mobile roadside units, and stationary roadside units supporting the operation of vehicular networks. Since traffic fluctuates, an architecture employing just stationary roadside units might not be able to properly support the network operation all the time. Similarly, an architecture composed just of mobile roadside units may lack part of the robustness provided by stationary roadside units. Furthermore, the traffic fluctuations are limited by the underlying road network, and the road networks do not change so often as traffic does. Thus, it seems straight full to assume that a set of roadside units will always be left stationary, while other roadside units will need to roam along the road network. As major roads counts on a higher transportation capacity, they tend to be very popular routes, and they are natural candidates for receiving the stationary roadside units. On the other hand, we may rely on mobile roadside units for handling roads presenting a high traffic variation. In this work we use the realistic vehicular mobility trace of Cologne, Germany, and we model the allocation of the roadside units as a Maximum Coverage Problem. Our results demonstrate the hybrid deployment increases the number of covered vehicles up to 45%.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"475 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124141550","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502926
Milan Cermák, Daniel Tovarnák, Martin Laštovička, Pavel Čeleda
Modern distributed stream processing systems can potentially be applied to real time network flow processing. However, differences in performance make some systems more suitable than others for being applied to this domain. We propose a novel performance benchmark, which is based on common security analysis algorithms of NetFlow data to determine the suitability of distributed stream processing systems. Three of the most used distributed stream processing systems are bench-marked and the results are compared with NetFlow data processing challenges and requirements. The benchmark results show that each system reached a sufficient data processing speed using a basic deployment scenario with little to no configuration tuning. Our benchmark, unlike any other, enables the performance of small structured messages to be processed on any stream processing system.
{"title":"A performance benchmark for NetFlow data analysis on distributed stream processing systems","authors":"Milan Cermák, Daniel Tovarnák, Martin Laštovička, Pavel Čeleda","doi":"10.1109/NOMS.2016.7502926","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502926","url":null,"abstract":"Modern distributed stream processing systems can potentially be applied to real time network flow processing. However, differences in performance make some systems more suitable than others for being applied to this domain. We propose a novel performance benchmark, which is based on common security analysis algorithms of NetFlow data to determine the suitability of distributed stream processing systems. Three of the most used distributed stream processing systems are bench-marked and the results are compared with NetFlow data processing challenges and requirements. The benchmark results show that each system reached a sufficient data processing speed using a basic deployment scenario with little to no configuration tuning. Our benchmark, unlike any other, enables the performance of small structured messages to be processed on any stream processing system.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123003458","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502936
Marc-Oliver Pahl
Many networked devices that can interface their physical environments are available off-the-shelf or can be built in 2016. A comprehensive management of those Smart Devices is required to unlock the existing potential. However, the amount and heterogeneity of the devices make their management difficult. A suitable abstraction is missing. This paper identifies requirements on managing Smart Devices from diverse research fields, assesses relevant existing work, proposes a new management middleware design, and evaluates it quantitatively and qualitatively. The presented novel middleware architecture could become an enabler for a software maker culture.
{"title":"Distributed smart space orchestration","authors":"Marc-Oliver Pahl","doi":"10.1109/NOMS.2016.7502936","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502936","url":null,"abstract":"Many networked devices that can interface their physical environments are available off-the-shelf or can be built in 2016. A comprehensive management of those Smart Devices is required to unlock the existing potential. However, the amount and heterogeneity of the devices make their management difficult. A suitable abstraction is missing. This paper identifies requirements on managing Smart Devices from diverse research fields, assesses relevant existing work, proposes a new management middleware design, and evaluates it quantitatively and qualitatively. The presented novel middleware architecture could become an enabler for a software maker culture.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115967016","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 : 2016-04-25DOI: 10.1109/NOMS.2016.7502872
Akio Watanabe, K. Ishibashi, Tsuyoshi Toyono, Tatsuaki Kimura, Keishiro Watanabe, Yoichi Matsuo, K. Shiomoto
In current large scale networks, troubleshooting has become more complicated task due to the diversification in the causes of network failures. The increase in the operational costs has become a serious problem. Thus, manualization of the troubleshooting process also becomes important task though it is time-consuming. We propose a method that automatically extracts a workflow for troubleshooting using multiple trouble tickets. Our method extracts an operator's actions from free-format texts and aligns relative sentences between multiple trouble tickets. Finally, we show a novel approach to visualizing a workflow by mining conditional branches using clustering. We validated our method using real trouble ticket data captured from a network operation and showed that it can extract the workflow to identify the cause of failure.
{"title":"Workflow extraction for service operation using multiple unstructured trouble tickets","authors":"Akio Watanabe, K. Ishibashi, Tsuyoshi Toyono, Tatsuaki Kimura, Keishiro Watanabe, Yoichi Matsuo, K. Shiomoto","doi":"10.1109/NOMS.2016.7502872","DOIUrl":"https://doi.org/10.1109/NOMS.2016.7502872","url":null,"abstract":"In current large scale networks, troubleshooting has become more complicated task due to the diversification in the causes of network failures. The increase in the operational costs has become a serious problem. Thus, manualization of the troubleshooting process also becomes important task though it is time-consuming. We propose a method that automatically extracts a workflow for troubleshooting using multiple trouble tickets. Our method extracts an operator's actions from free-format texts and aligns relative sentences between multiple trouble tickets. Finally, we show a novel approach to visualizing a workflow by mining conditional branches using clustering. We validated our method using real trouble ticket data captured from a network operation and showed that it can extract the workflow to identify the cause of failure.","PeriodicalId":344879,"journal":{"name":"NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115319560","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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