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Publications (10 of 144) Show all publications
Alizadeh Noghani, K., Hernandez Benet, C., Kassler, A., Antonio, M., Jestin, P. & Srivastava, V. V. (2017). Automating Ethernet VPN deployment in SDN-based Data Centers. In: 2017 Fourth International Conference on Software Defined Systems (SDS).: . Paper presented at Fourth International Conference on Software Defined Systems (SDS) 2017. 8-11 May, 2017. Valencia, Spain. (pp. 61-66). IEEE
Open this publication in new window or tab >>Automating Ethernet VPN deployment in SDN-based Data Centers
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2017 (English)In: 2017 Fourth International Conference on Software Defined Systems (SDS)., IEEE, 2017, p. 61-66Conference paper, Published paper (Refereed)
Abstract [en]

Layer 2 Virtual Private Network (L2VPN) is widely deployed in both service provider networks and enterprises. However, legacy L2VPN solutions have scalability limitations in the context of Data Center (DC) interconnection and networking which require new approaches that address the requirements of service providers for virtual private cloud services. Recently, Ethernet VPN (EVPN) has been proposed to address many of those concerns and vendors started to deploy EVPN based solutions in DC edge routers. However, manual configuration leads to a time-consuming, error-prone configuration and high operational costs. Automating the EVPN deployment from cloud platforms such as OpenStack enhances both the deployment and flexibility of EVPN Instances (EVIs). This paper proposes a Software Defined Network (SDN) based framework that automates the EVPN deployment and management inside SDN-based DCs using OpenStack and OpenDaylight (ODL). We implemented and extended several modules inside ODL controller to manage and interact with EVIs and an interface to OpenStack that allows the deployment and configuration of EVIs. We conclude with scalability analysis of our solution.

Place, publisher, year, edition, pages
IEEE, 2017
Keyword
cloud computing, computer centres, local area networks, software defined networking, virtual private networks
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-65144 (URN)10.1109/SDS.2017.7939142 (DOI)978-1-5386-2855-3 (ISBN)
Conference
Fourth International Conference on Software Defined Systems (SDS) 2017. 8-11 May, 2017. Valencia, Spain.
Projects
HITS
Funder
Knowledge Foundation
Available from: 2017-11-09 Created: 2017-11-09 Last updated: 2018-01-13Bibliographically approved
Marotta, A., D’Andreagiovanni, F., Kassler, A. & Zola, E. (2017). On the energy cost of robustness for green virtual network function placement in 5G virtualized infrastructures. Computer Networks, 125, 64-75
Open this publication in new window or tab >>On the energy cost of robustness for green virtual network function placement in 5G virtualized infrastructures
2017 (English)In: Computer Networks, ISSN 1389-1286, E-ISSN 1872-7069, Vol. 125, p. 64-75Article in journal (Refereed) Published
Abstract [en]

Next generation 5G networks will rely on virtualized Data Centers (vDC) to host virtualized network functions on commodity servers. Such Network Function Virtualization (NFV) will lead to significant savings in terms of infrastructure cost and reduced management complexity. However, green strategies for networking and computing inside data centers, such as server consolidation or energy aware routing, should not negatively impact the quality and service level agreements expected from network operators. In this paper, we study how robust strategies that place virtual network functions (VNF) inside vDC impact the energy savings and the protection level against resource demand uncertainty. We propose novel optimization models that allow the minimization of the energy of the computing and network infrastructure which is hosting a set of service chains that implement the VNFs. The model explicitly provides for robustness to unknown or imprecisely formulated resource demand variations, powers down unused routers, switch ports and servers, and calculates the energy optimal VNF placement and network embedding also considering latency constraints on the service chains. We propose both exact and heuristic methods. Our experiments were carried out using the virtualized Evolved Packet Core (vEPC), which allows us to quantitatively assess the trade-off between energy cost, robustness and the protection level of the solutions against demand uncertainty. Our heuristic is able to converge to a good solution in a very short time, in comparison to the exact solver, which is not able to output better results in a longer run as demonstrated by our numerical evaluation. We also study the degree of robustness of a solution for a given protection level and the cost of additional energy needed because of the usage of more computing and network elements.

Place, publisher, year, edition, pages
Elsevier, 2017
Keyword
Virtualization, Binary linear programming, Robust optimization, Network function virtualization (NFV), EPC, 5G
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-64563 (URN)10.1016/j.comnet.2017.04.045 (DOI)
Projects
HITS
Funder
Knowledge Foundation, 4707
Available from: 2017-10-16 Created: 2017-10-16 Last updated: 2018-01-13Bibliographically approved
Vestin, J. & Kassler, A. (2017). SDN enabled resiliency in LTE assisted small cell mmWave backhaul networks. In: Crespi, N Manzalini, A Secci (Ed.), Proceedings of the 2017 20th conference on innovations in clouds, internet and networks (ICIN): . Paper presented at The 20th Conference on Innovations in Clouds, Internet and Networks (ICIN), 7-9 March 2017. Paris, France (pp. 199-202). IEEE
Open this publication in new window or tab >>SDN enabled resiliency in LTE assisted small cell mmWave backhaul networks
2017 (English)In: Proceedings of the 2017 20th conference on innovations in clouds, internet and networks (ICIN) / [ed] Crespi, N Manzalini, A Secci, IEEE, 2017, p. 199-202Conference paper, Published paper (Refereed)
Abstract [en]

As mobile data usage increases dramatically, new architectures and technologies for wireless communication are required. Next generation of mobile networks are expected to be augmented by a massive amount of small cells that will be densely deployed. In order to connect the small cells, new high capacity wireless backhauling technologies are required. A promising solution is to use frequencies in the mmWave band, which allows for much greater capacity due to the massive amount of free spectrum. However, the special characteristics of the mmWave bands such as high path loss and atmospheric absorption lead to unstable links. In this paper, we investigate using Software Defined Networking principles for the operation and control of wireless backhaul networks. We demonstrate how SDN resiliency mechanisms can be used to mitigate disruptive connectivity due to mmWave links frequently failing. For assisting the small cell backhauling, we propose to also use the LTE uplinks of the small cells as backup links, should the mmWave mesh forwarding link break. Our experiments using a network emulator show that using SDN-based local repair mechanisms can significantly reduce the packet loss rate inside the mmWave backhaul mesh, which can be further reduced with an LTE assisted Failover.

Place, publisher, year, edition, pages
IEEE, 2017
Series
Conference on Innovations in Clouds Internet and Networks, ISSN 2472-8144
Keyword
cellular radio, Long Term Evolution, millimetre waves, next generation networks, radio links, software defined networking
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-65608 (URN)10.1109/ICIN.2017.7899411 (DOI)000403310200030 ()978-1-5090-3672-1 (ISBN)
Conference
The 20th Conference on Innovations in Clouds, Internet and Networks (ICIN), 7-9 March 2017. Paris, France
Available from: 2018-01-15 Created: 2018-01-15 Last updated: 2018-04-20Bibliographically approved
Santos, R. & Kassler, A. (2016). A SDN Controller Architecture for Small Cell Wireless Backhaul using a LTE Control Channel. In: Proceedings of the IEEE WoWMoM: . Paper presented at WoWMoM 2016 - IEEE 17th International Symposium on a World of Wireless, Mobile and Multimedia Networks, June 21-24 2016, Coimbra, Portugal. IEEE Press
Open this publication in new window or tab >>A SDN Controller Architecture for Small Cell Wireless Backhaul using a LTE Control Channel
2016 (English)In: Proceedings of the IEEE WoWMoM, IEEE Press, 2016Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE Press, 2016
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-41735 (URN)10.1109/WoWMoM.2016.7523544 (DOI)000392273900049 ()
Conference
WoWMoM 2016 - IEEE 17th International Symposium on a World of Wireless, Mobile and Multimedia Networks, June 21-24 2016, Coimbra, Portugal
Funder
Knowledge Foundation, SOCRA
Available from: 2016-04-20 Created: 2016-04-20 Last updated: 2018-01-10Bibliographically approved
Mesodiakaki, A., Kassler, A., Enrica, Z., Mattias, F. & Tao, C. (2016). Energy Efficient Line-of-Sight Millimeter Wave Small Cell Backhaul: 60, 70, 80 or 140 GHz?. In: World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2016 IEEE 17th International Symposium on A: . Paper presented at WoWMoM 2016 The IEEE 17th International Symposium on a World of Wireless, Mobile and Multimedia Networks, June 21-24, 2016, Coimbra, Portugal. IEEE
Open this publication in new window or tab >>Energy Efficient Line-of-Sight Millimeter Wave Small Cell Backhaul: 60, 70, 80 or 140 GHz?
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2016 (English)In: World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2016 IEEE 17th International Symposium on A, IEEE, 2016Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2016
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-41737 (URN)10.1109/WoWMoM.2016.7523521 (DOI)000392273900026 ()
Conference
WoWMoM 2016 The IEEE 17th International Symposium on a World of Wireless, Mobile and Multimedia Networks, June 21-24, 2016, Coimbra, Portugal
Funder
Knowledge Foundation, SOCRA
Available from: 2016-04-20 Created: 2016-04-20 Last updated: 2018-01-10Bibliographically approved
Marotta, A. & Kassler, A. (2016). Green Virtual Network Functions Placement Under Uncertainty Constraints. In: : . Paper presented at The 28th European Conference on Operational Research, Poznan, 3-6 July 2016.
Open this publication in new window or tab >>Green Virtual Network Functions Placement Under Uncertainty Constraints
2016 (English)In: , 2016Conference paper, Oral presentation with published abstract (Refereed)
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-41734 (URN)
Conference
The 28th European Conference on Operational Research, Poznan, 3-6 July 2016
Projects
HITS
Funder
Knowledge Foundation
Available from: 2016-04-20 Created: 2016-04-20 Last updated: 2018-01-12Bibliographically approved
Bellalta, B., Bononi, L., Bruno, R. & Kassler, A. (2016). Next generation IEEE 802.11 Wireless Local Area Networks: Current status, future directions and open challenges. Computer Communications, 75, 1-25
Open this publication in new window or tab >>Next generation IEEE 802.11 Wireless Local Area Networks: Current status, future directions and open challenges
2016 (English)In: Computer Communications, ISSN 0140-3664, E-ISSN 1873-703X, Vol. 75, p. 1-25Article in journal (Refereed) Published
Abstract [en]

A new generation of Wireless Local Area Networks (WLANs) will make its appearance in the market in the forthcoming years based on the amendments to the IEEE 802.11 standards that have recently been approved or are under development. Examples of the most expected ones are IEEE 802.11aa (Robust Audio Video Transport Streaming), IEEE 802.11ac (Very-high throughput at < 6 GHz), IEEE 802.11af (TV White Spaces) and IEEE 802.11ah (Machine-to-Machine communications) specifications. The aim of this survey is to provide a comprehensive overview of these novel technical features and the related open technical challenges that will drive the future WLAN evolution. In contrast to other IEEE 802.11 surveys, this is a use case oriented study. Specifically, we first describe the three key scenarios in which next-generation WLANs will have to operate. We then review the most relevant amendments for each of these use cases focusing on the additional functionalities and the new technologies they include, such as multi-user MIMO techniques, groupcast communications, dynamic channel bonding, spectrum databases and channel sensing, enhanced power saving mechanisms and efficient small data transmissions. We also discuss the related work to highlight the key issues that must still be addressed. Finally, we review emerging trends that can influence the design of future WLANs, with special focus on software-defined MACs and the internet-working with cellular systems.

Place, publisher, year, edition, pages
Elsevier, 2016
Keyword
WLANs; IEEE 802.11; Video streaming; Cognitive radio; M2M; Internet of Things
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-38720 (URN)10.1016/j.comcom.2015.10.007 (DOI)000371843300001 ()
Available from: 2015-11-27 Created: 2015-11-27 Last updated: 2018-01-10Bibliographically approved
Vestin, J. & Kassler, A. (2016). Resilient SDN based Small Cell Backhaul Networks using mm Wave Bands. In: World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2016 IEEE 17th International Symposium on A: . Paper presented at IEEE WoWMoM 2016 - Seventeenth International Symposium on a World of Wireless, Mobile and Multimedia Networks, June 21-24, 2016, Coimbra, Portugal. IEEE Communications Society
Open this publication in new window or tab >>Resilient SDN based Small Cell Backhaul Networks using mm Wave Bands
2016 (English)In: World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2016 IEEE 17th International Symposium on A, IEEE Communications Society, 2016Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE Communications Society, 2016
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-41736 (URN)10.1109/WoWMoM.2016.7523543 (DOI)000392273900048 ()
Conference
IEEE WoWMoM 2016 - Seventeenth International Symposium on a World of Wireless, Mobile and Multimedia Networks, June 21-24, 2016, Coimbra, Portugal
Funder
Knowledge Foundation, SOCRA
Available from: 2016-04-20 Created: 2016-04-20 Last updated: 2018-01-10Bibliographically approved
Coutinho, N., Matos, R., Marques, C., Reis, A., Sargento, S., Chakareski, J. & Kassler, A. (2015). Dynamic Dual-Reinforcement-Learning Routing Strategies for Quality of Experience-aware Wireless Mesh Networking. Computer Networks, 88(269), Article ID 285.
Open this publication in new window or tab >>Dynamic Dual-Reinforcement-Learning Routing Strategies for Quality of Experience-aware Wireless Mesh Networking
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2015 (English)In: Computer Networks, ISSN 1389-1286, E-ISSN 1872-7069, Vol. 88, no 269, article id 285Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2015
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-38723 (URN)10.1016/j.comnet.2015.06.016 (DOI)000359890200019 ()
Available from: 2015-11-27 Created: 2015-11-27 Last updated: 2018-01-10Bibliographically approved
Zola, E. & Kassler, A. (2015). Energy Efficient Control of Virtual Machine Consolidation under Uncertain Input Parameters for the Cloud. In: Proceedings of the Workshop on Engineering and Control for Reliable Cloud Services, Ghent, Belgium, September 2015: . Paper presented at Workshop on Engineering and Control for Reliable Cloud Services, Ghent, Belgium, September 2015.
Open this publication in new window or tab >>Energy Efficient Control of Virtual Machine Consolidation under Uncertain Input Parameters for the Cloud
2015 (English)In: Proceedings of the Workshop on Engineering and Control for Reliable Cloud Services, Ghent, Belgium, September 2015, 2015Conference paper, Oral presentation with published abstract (Refereed)
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-38746 (URN)
Conference
Workshop on Engineering and Control for Reliable Cloud Services, Ghent, Belgium, September 2015
Available from: 2015-11-27 Created: 2015-11-27 Last updated: 2018-01-10Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9446-8143

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