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Publications (10 of 55) Show all publications
Natalino, C., Yayimli, A., Wosinska, L. & Furdek, M. (2019). Infrastructure upgrade framework for Content Delivery Networks robust to targeted attacks. Optical Switching and Networkning Journal, 31, 202-210
Open this publication in new window or tab >>Infrastructure upgrade framework for Content Delivery Networks robust to targeted attacks
2019 (English)In: Optical Switching and Networkning Journal, ISSN 1573-4277, E-ISSN 1872-9770, Vol. 31, p. 202-210Article in journal (Refereed) Published
Abstract [en]

Content Delivery Networks (CDNs) are crucial for enabling delivery of services that require high capacity and low latency, primarily through geographically-diverse content replication. Optical networks are the only available future-proof technology that meets the reach and capacity requirements of CDNs. However, the underlying physical network infrastructure is vulnerable to various security threats, and the increasing importance of CDNs in supporting vital services intensifies the concerns related to their robustness. Malicious attackers can target critical network elements, thus severely degrading network connectivity and causing large-scale service disruptions. One way in which network operators and cloud computing providers can increase the robustness against malicious attacks is by changing the topological properties of the network through infrastructure upgrades. This work proposes a framework for CDN infrastructure upgrade that performs sparse link and replica addition with the objective of maximizing the content accessibility under targeted link cut attacks. The framework is based on a newly defined content accessibility metric denoted as mu-ACA which allows the network operator to gauge the CDN robustness over a range of attacks with varying intensity. Two heuristics, namely Content-Accessibility Aware Link Addition Heuristic (CAA-LAH), and Content-Accessibility-Aware Replica Addition Heuristic (CAA-RAH) are developed to perform strategic link and replica placement, respectively, and hamper attackers from disconnecting users from the content even in severe attack scenarios. Extensive experiments on real-world reference network topologies show that the proposed framework effectively increases the CDN robustness by adding a few links or replicas to the network.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
Content delivery networks, Content replica addition, Infrastructure upgrade, Link addition, Network robustness, Optical networks, Targeted attacks
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-241189 (URN)10.1016/j.osn.2018.10.006 (DOI)000454380100017 ()2-s2.0-85056237720 (Scopus ID)
Note

QC 20190121

Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-01-21Bibliographically approved
Tremblay, C., Archambault, E., Be´langer, M. P., Littlewood, P., Clelland, W., Furdek, M. & Wosinska, L. (2018). Agile optical networking: Beyond filtered solutions. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Communication Conference, OFC 2018, 11 March 2017 through 15 March 2017. Optics Info Base, Optical Society of America
Open this publication in new window or tab >>Agile optical networking: Beyond filtered solutions
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2018 (English)In: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Filterless optical networks based on broadcast-and-select nodes and coherent transceivers are attractive cost-effective and flexible solutions in core networks. In this paper, we explore the suitability of filterless architectures in metropolitan core and aggregation networks.

Place, publisher, year, edition, pages
Optics Info Base, Optical Society of America, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-228661 (URN)10.1364/OFC.2018.M1A.5 (DOI)2-s2.0-85047134241 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Communication Conference, OFC 2018, 11 March 2017 through 15 March 2017
Note

QC 20180529

Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-05-29Bibliographically approved
Tremblay, C., Archambault, E., Belanger, M. P., Littlewood, P., Clelland, W., Furdek, M. & Wosinska, L. (2018). Agile Optical Networking: Beyond Filtered Solutions. In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings: . Paper presented at 2018 Optical Fiber Communications Conference and Exposition, OFC 2018, San Diego, United States, 11 March 2018 through 15 March 2018. IEEE
Open this publication in new window or tab >>Agile Optical Networking: Beyond Filtered Solutions
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2018 (English)In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings, IEEE , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Filterless optical networks based on broadcast-and-select nodes and coherent transceivers are attractive cost-effective and flexible solutions in core networks. In this paper, we explore the suitability of filterless architectures in metropolitan core and aggregation networks.

Place, publisher, year, edition, pages
IEEE, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-232646 (URN)000437286300005 ()2-s2.0-85050022817 (Scopus ID)9781943580385 (ISBN)
Conference
2018 Optical Fiber Communications Conference and Exposition, OFC 2018, San Diego, United States, 11 March 2018 through 15 March 2018
Note

QC 20180802

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-02Bibliographically approved
Dobrijevic, O., Natalino, C., Furdek, M., Hodzic, H., Dzanko, M. & Wosinska, L. (2018). Another price to pay: An availability analysis for SDN virtualization with network hypervisors. In: Proceedings of 2018 10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018: . Paper presented at 10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018, 27 August 2018 through 29 August 2018. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Another price to pay: An availability analysis for SDN virtualization with network hypervisors
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2018 (English)In: Proceedings of 2018 10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018, Institute of Electrical and Electronics Engineers Inc. , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Communication networks are embracing the software defined networking (SDN) paradigm. Its architectural shift assumes that a remote SDN controller (SDNC) in the control plane is responsible for configuring the underlying devices of the forwarding plane. In order to support flexibility-motivated network slicing, SDN-based networks employ another entity in the control plane, a network hypervisor (NH). This paper first discusses different protection strategies for the control plane with NHs and presents the corresponding availability models, which assume possible failures of links and nodes in the forwarding plane and the control plane. An analysis of these protection alternatives is then performed so as to compare average control plane availability, average path length for the control communication that traverses NH, and infrastructure resources required to support them. Our results confirm the intuition that the NH introduction generally results in a reduction of the control plane availability, which stresses the need for appropriate protection. However, the availability achieved by each of the considered strategies is impacted differently by the node availability and the link failure probability, thus calling for a careful selection that is based on the infrastructure features.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keywords
availability analysis, network hypervisor, reliability, SDN controller, Software defined networking (SDN), Availability, Reliability analysis, Software defined networking, Software reliability, Virtualization, Availability models, Control communications, Hypervisor, Infrastructure resources, Link-failure probabilities, Sdn controllers, Controllers
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-247140 (URN)10.1109/RNDM.2018.8489784 (DOI)2-s2.0-85056653439 (Scopus ID)9781538670309 (ISBN)
Conference
10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018, 27 August 2018 through 29 August 2018
Note

QC 20190403

Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-04-03Bibliographically approved
Yaghoubi, F., Furdek, M., Rostami, A., Ohlen, P. & Wosinska, L. (2018). Consistency-Aware Weather Disruption-Tolerant Routing in SDN-Based Wireless Mesh Networks. IEEE Transactions on Network and Service Management, 15(2), 582-595
Open this publication in new window or tab >>Consistency-Aware Weather Disruption-Tolerant Routing in SDN-Based Wireless Mesh Networks
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2018 (English)In: IEEE Transactions on Network and Service Management, ISSN 1932-4537, E-ISSN 1932-4537, Vol. 15, no 2, p. 582-595Article in journal (Refereed) Published
Abstract [en]

Wireless network solutions, a dominant enabling technology for the backhaul segment, are susceptible to weather disturbances that can substantially degrade network throughput and/or delay, compromising the stringent 5G requirements. These effects can be alleviated by centralized rerouting realized by software defined networking architecture. However, careless frequent reconfigurations can lead to inconsistencies in the network states due to asynchrony between different switches, which can create congestion and limit the rerouting gain. The aim of this paper is to minimize the total data loss during rain disturbance by proposing an algorithm that decides on the timing, the sequence, and the paths for rerouting of network flows considering the imposed congestion during reconfiguration. At each time sample, the central controller decides whether to adopt the optimal routes at a switching cost, defined as the imposed congestion, or to keep using existing, sub-optimal routes at a throughput loss. To find optimal solutions with minimal data loss in a static scenario, we formulate a dynamic programming problem that utilizes perfect knowledge of rain attenuation for the whole rain period. For dynamic scenarios with unknown future rain attenuation, we propose an online consistency-aware rerouting algorithm, called consistency-aware rerouting with prediction (CARP), which uses the temporal correlation of rain fading to estimate future rain attenuation. Simulation results on synthetic and real networks validate the efficiency of our CARP algorithm, substantially reducing data loss and increasing network throughput with a fewer number of rerouting actions compared to a greedy and a regular rerouting benchmarking approaches.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
5G, wireless software-defined networking, routing, rain disturbance, model predictive control
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-231716 (URN)10.1109/TNSM.2018.2795748 (DOI)000435177300007 ()2-s2.0-85040925980 (Scopus ID)
Note

QC 20180817

Available from: 2018-08-17 Created: 2018-08-17 Last updated: 2019-02-22Bibliographically approved
Yaghoubi, F. (2018). Consistency-Aware Weather Disruption-Tolerant Routing in SDN-Based Wireless Mesh Networks. IEEE Transactions on Network and Service Management, 15(2), pp. 582-595
Open this publication in new window or tab >>Consistency-Aware Weather Disruption-Tolerant Routing in SDN-Based Wireless Mesh Networks
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2018 (English)In: IEEE Transactions on Network and Service Management, ISSN 1932-4537, E-ISSN 1932-4537, Vol. 15, no 2, p. 582-595Article in journal, News item (Refereed) Published
Abstract [en]

Wireless network solutions, a dominant enabling technology for the backhaul segment, are susceptible to weather disturbances that can substantially degrade network throughput and/or delay, compromising the stringent 5G requirements. These effects can be alleviated by centralized rerouting realized by software defined networking architecture. However, careless frequent reconfigurations can lead to inconsistencies in the network states due to asynchrony between different switches, which can create congestion and limit the rerouting gain. The aim of this paper is to minimize the total data loss during rain disturbance by proposing an algorithm that decides on the timing, the sequence, and the paths for rerouting of network flows considering the imposed congestion during reconfiguration. At each time sample, the central controller decides whether to adopt the optimal routes at a switching cost, defined as the imposed congestion, or to keep using existing, sub-optimal routes at a throughput loss. To find optimal solutions with minimal data loss in a static scenario, we formulate a dynamic programming problem that utilizes perfect knowledge of rain attenuation for the whole rain period. For dynamic scenarios with unknown future rain attenuation, we propose an online consistency-aware rerouting the algorithm, called consistency-aware rerouting with prediction (CARP), which uses the temporal correlation of rain fading to estimate future rain attenuation. Simulation results on synthetic and real networks validate the efficiency of our CARP algorithm, substantially reducing data loss and increasing network throughput with a fewer number of rerouting actions compared to a greedy and a regular rerouting benchmarking approaches.

Keywords
5G, wireless software-defined networking, routing, rain disturbance, model predictive control.
National Category
Engineering and Technology
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-244607 (URN)
Note

QC 20190304

Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-03-04Bibliographically approved
Dzanko, M., Mikac, B. & Furdek, M. (2018). Dedicated path protection for optical networks based on function programmable nodes. Optical Switching and Networkning Journal, 27, 79-87
Open this publication in new window or tab >>Dedicated path protection for optical networks based on function programmable nodes
2018 (English)In: Optical Switching and Networkning Journal, ISSN 1573-4277, E-ISSN 1872-9770, Vol. 27, p. 79-87Article in journal (Refereed) Published
Abstract [en]

Due to the constantly increasing volumes and tightening reliability requirements of network traffic, survivability is one of the key concerns in optical network design. Optical "white box" nodes based on the Architecture on Demand (AoD) paradigm allow for self-healing of nodal component failures due to their architectural flexibility and the ability to employ idle components for failure recovery. By incorporating node-level survivability with network-level protection from link failures, resiliency of optical networks can be significantly improved. To this end, we propose a survivable routing algorithm for AoD-based networks called Dedicated Path Protection with Enforced Fiber Switching (DPP-EFS), which combines self-healing at the node level with dedicated path protection at the network level. The algorithm aims at improving the self-healing capabilities of the nodes by increasing the percentage of fiber switching (FS). Namely, fiber-switched lightpaths require a minimal amount of processing within the node (i.e. only signal switching), while other aspects of processing (e.g. demultiplexing, bandwidth virtualization) and the related components (i.e. demultiplexers, splitters, wavelength selective switches) remain unused and may be used as redundancy. On the other hand, lightpaths that are not eligible for FS have to be re-routed to alternative, longer paths in order to allow for FS between certain ports within the node. Therefore, the proposed algorithm pursues an advantageous trade-off between the increase of the number of idle components which can be used as redundancy at the node level and the unwanted length increase of lightpaths re-routed to render components redundant. For particular cases when DPP-EFS is not able to reduce the mean down time (MDT) in the network merely by increasing the percentage of fiber switching, we propose an algorithm for Dedicated Path Protection with Fixed Shortest Path routing and added Redundancy (DPP-FSP-RED) which adds additional spare components at strategic nodes to ensure that all connections have at least one redundant node component along their path. Simulation results show a significant reduction in MDT with minimal extra capital expenses.

National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:kth:diva-218193 (URN)10.1016/j.osn.2017.09.001 (DOI)000414817000007 ()2-s2.0-85030090778 (Scopus ID)
Note

QC 20171204

Available from: 2017-12-04 Created: 2017-12-04 Last updated: 2017-12-04Bibliographically approved
Goscien, R., Natalino, C., Wosinska, L. & Furdek, M. (2018). Impact of high-power jamming attacks on SDM networks. In: 22nd Conference on Optical Network Design and Modelling, ONDM 2018 - Proceedings: . Paper presented at 22nd Conference on Optical Network Design and Modelling, ONDM 2018, Dublin, Ireland, 14 May 2018 through 17 May 2018 (pp. 77-81). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Impact of high-power jamming attacks on SDM networks
2018 (English)In: 22nd Conference on Optical Network Design and Modelling, ONDM 2018 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 77-81Conference paper, Published paper (Refereed)
Abstract [en]

Space Division Multiplexing (SDM) is a promising solution to provide ultra-high capacity optical network infrastructure for rapidly increasing traffic demands. Such network infrastructure can be a target of deliberate attacks that aim at disrupting a large number of vital services. This paper assesses the effects of high-power jamming attacks in SDM optical networks utilizing Multi-Core Fibers (MCFs), where the disruptive effect of the inserted jamming signals may spread among multiple cores due to increased Inter-Core CrossTalk (ICo-XT). We first assess the jamming-induced reduction of the signal reach for different bit rates and modulation formats. The obtained reach limitations are then used to derive the maximal traffic disruption at the network level. Results indicate that connections provisioned satisfying the normal operating conditions are highly vulnerable to these attacks, potentially leading to huge data losses at the network level.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
High-power jamming attacks, optical network security, space division multiplexing
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-233690 (URN)10.23919/ONDM.2018.8396110 (DOI)2-s2.0-85050275972 (Scopus ID)9783903176072 (ISBN)
Conference
22nd Conference on Optical Network Design and Modelling, ONDM 2018, Dublin, Ireland, 14 May 2018 through 17 May 2018
Note

QC 20180830

Available from: 2018-08-30 Created: 2018-08-30 Last updated: 2018-08-30Bibliographically approved
Natalino, C., Sousa, A. D., Wosinska, L. & Furdek, M. (2018). On the trade-offs between user-to-replica distance and CDN robustness to link cut attacks. In: Proceedings of 2018 10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018: . Paper presented at 10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018, 27 August 2018 through 29 August 2018. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>On the trade-offs between user-to-replica distance and CDN robustness to link cut attacks
2018 (English)In: Proceedings of 2018 10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018, Institute of Electrical and Electronics Engineers Inc. , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Content Delivery Networks (CDNs) are a key enabler for geographically-distributed content delivery with high throughput and low latency. As CDNs utilize the underlying optical core network infrastructure, they inherit its vulnerability to targeted link cut attacks which can cause severe service degradation. One of the fundamental problems in CDN configuration is deciding on the placement of content replicas across the underlying network of data centers, which should obtain balance among multiple, often conflicting performance criteria. This paper investigates the implications of minimizing the average distance between the users and the content replicas on the CDN robustness to targeted link cuts.To this end, we compute Pareto-optimal replica placement solutions with minimal user-to-replica distance and maximal robustness to link cut attacks of the highest damaging potential. k-best replica placement solutions in terms of the user-to-replica distance are calculated by formulating the problem as an Integer Linear Programming (ILP) exact method. For each replica placement solution, the worst case link cut attack scenario is identified by defining the Critical Link Set Detection (CLSD) problem. CLSD returns the link set whose cutting disconnects the maximal number of nodes from the content. We develop an ILP model for the CLSD and evaluate the robustness of the resulting CDN attack scenario in terms of mean content accessibility. The approach is evaluated through extensive simulations on real-world reference topologies, indicating that it is possible to improve the robustness to link cuts at the expense of small user-to-replica distance penalties. Moreover, the improvement of robustness is more significant for topologies with smaller average node degree and when cuts involve a larger number of links.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keywords
Distributed computer systems, Integer programming, Network security, Pareto principle, Topology, Average node degrees, Content accessibility, Content delivery network, Distributed content delivery, Extensive simulations, Integer Linear Programming, Optical core networks, Performance criterion, Economic and social effects
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-247141 (URN)10.1109/RNDM.2018.8489838 (DOI)2-s2.0-85056638988 (Scopus ID)9781538670309 (ISBN)
Conference
10th International Workshop on Resilient Networks Design and Modeling, RNDM 2018, 27 August 2018 through 29 August 2018
Note

QC 20190403

Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-04-03Bibliographically approved
Ranaweera, C., Monti, P., Skubic, B., Furdek, M., Wosinska, L., Nirmalathas, A., . . . Wong, E. (2018). Optical X-haul Options for 5G Fixed Wireless Access: Which One to Choose?. In: IEEE INFOCOM 2018 - IEEE CONFERENCE ON COMPUTER COMMUNICATIONS WORKSHOPS (INFOCOM WKSHPS): . Paper presented at IEEE Conference on Computer Communications (IEEE INFOCOM), APR 15-19, 2018, Honolulu, HI. IEEE
Open this publication in new window or tab >>Optical X-haul Options for 5G Fixed Wireless Access: Which One to Choose?
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2018 (English)In: IEEE INFOCOM 2018 - IEEE CONFERENCE ON COMPUTER COMMUNICATIONS WORKSHOPS (INFOCOM WKSHPS), IEEE , 2018Conference paper, Published paper (Refereed)
Abstract [en]

5G is anticipated to be a significant leap in the evolution of mobile communication. Being designed to facilitate 10 to 100 times more capacity than 4G, 5G is considered to be the most cost-efficient solution to provide Fixed Wireless Access (FWA)to households on a large scale where providing last mile access using wired solution might not be economically viable. With a range of promises to deliver user experience improvements, facilitating cost-efficient data transportation between FWA users and network core still remains an unsolved issue, given the enormous volume of data that will be traversing the superior 5G network. This work addresses this compelling problem by formulating a joint-optimization framework to plan and analyze the optimal deployment of diverse optical x-haul strategies that can be used in 5G-based FWA networks. The work provides a cornerstone for deployment strategies that will be imperative to realize future-proof FWA network.

Place, publisher, year, edition, pages
IEEE, 2018
Series
IEEE Conference on Computer Communications Workshops, ISSN 2159-4228
Keywords
Optical networks, 5G wireless network, FWA, network optimization
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-239842 (URN)10.1109/INFCOMW.2018.8406906 (DOI)000450157700031 ()2-s2.0-85050672863 (Scopus ID)978-1-5386-5979-3 (ISBN)
Conference
IEEE Conference on Computer Communications (IEEE INFOCOM), APR 15-19, 2018, Honolulu, HI
Note

QC 20181219

Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2018-12-19Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0001-5600-3700

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