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Publications (10 of 51) 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
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: 2018-11-13Bibliographically 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
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
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: INFOCOM 2018 - IEEE Conference on Computer Communications Workshops: . Paper presented at 2018 IEEE Conference on Computer Communications Workshops, INFOCOM 2018, 15 April 2018 through 19 April 2018 (pp. 1-2). Institute of Electrical and Electronics Engineers Inc.
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: INFOCOM 2018 - IEEE Conference on Computer Communications Workshops, Institute of Electrical and Electronics Engineers Inc. , 2018, p. 1-2Conference 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. © 2018 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keywords
5G wireless network, FWA, network optimization, Optical networks, Communication, Computer networks, Fiber optic networks, 5G wireless networks, Deployment strategy, Economically viable, Fixed wireless access, Joint optimization, Mobile communications, Optimal deployment, 5G mobile communication systems
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-238088 (URN)10.1109/INFCOMW.2018.8406906 (DOI)2-s2.0-85050672863 (Scopus ID)9781538659793 (ISBN)
Conference
2018 IEEE Conference on Computer Communications Workshops, INFOCOM 2018, 15 April 2018 through 19 April 2018
Note

Conference code: 137864; Export Date: 30 October 2018; Conference Paper

QC 20190111

Available from: 2019-01-11 Created: 2019-01-11 Last updated: 2019-01-11Bibliographically approved
Yaghoubi, F., Furdek, M., Rostami, A., Öhlén, P. & Wosinska, L. (2018). Reliable topology design of wireless networks under correlated failures. In: 2018 IEEE International Conference on Communications (ICC): . Paper presented at 2018 IEEE International Conference on Communications, ICC 2018, Kansas City, United States, 20 May 2018 through 24 May 2018. Institute of Electrical and Electronics Engineers (IEEE), Article ID 8422496.
Open this publication in new window or tab >>Reliable topology design of wireless networks under correlated failures
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2018 (English)In: 2018 IEEE International Conference on Communications (ICC), Institute of Electrical and Electronics Engineers (IEEE), 2018, article id 8422496Conference paper, Published paper (Refereed)
Abstract [en]

Inherent vulnerability of wireless backhauling to random fluctuations of the wireless channel complicates the design of reliable backhaul networks. In the presence of such disturbances, network reliability can be improved by providing redundant paths between given source and destination. Many studies deal with modifying and designing the network topology to meet the reliability requirements in a cost- efficient manner. However, these studies ignore the correlation among link failures, such as those caused by rain. Consequently, the resulting topology design solutions may fail to satisfy the network reliability requirements under correlated failure scenarios. To address this issue, this paper studies the design of reliable wireless backhaul networks under correlated failures with focus on rain fading. We consider green-field topology design and brown-field topology upgrade scenarios with the objective to minimize the total cost of wireless links added to meet the target reliability requirement in the presence of correlated link failures. We propose a new model to formulate the spatial correlation using pairwise joint probability distribution of rain attenuation between different links. This model is applied to consider the link- wise correlation along individual paths, as well as the correlation among the multiple redundant paths from the source to the destination node of a traffic flow. We formulate the problem as a quadratic integer program, which is NP-hard, and develop a heuristic algorithm to find near-optimal solutions. Performance evaluation shows that correlation-aware design improves the resiliency under rain disturbance at a slightly increased cost.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
5G, Correlated failures, Rain disturbance, Reliability, Topology design
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-233656 (URN)10.1109/ICC.2018.8422496 (DOI)2-s2.0-85051421629 (Scopus ID)9781538631805 (ISBN)
Conference
2018 IEEE International Conference on Communications, ICC 2018, Kansas City, United States, 20 May 2018 through 24 May 2018
Note

QC 20180828

Available from: 2018-08-28 Created: 2018-08-28 Last updated: 2018-08-28Bibliographically approved
Abedifar, V., Furdek, M., Muhammad, A., Eshghi, M. & Wosinska, L. (2018). Routing, Modulation and Spectrum Assignment in Programmable Networks based on Optical White Boxes. Journal of Optical Communications and Networking, 10(9), 723-735
Open this publication in new window or tab >>Routing, Modulation and Spectrum Assignment in Programmable Networks based on Optical White Boxes
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2018 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 10, no 9, p. 723-735Article in journal (Refereed) Published
Abstract [en]

Elastic optical networks (EONs) can help overcome the flexibility challenges imposed by emerging heterogeneous and bandwidth-intensive applications. Among the different solutions for flexible optical nodes, optical white box switches implemented by architecture on demand (AoD) have the capability to dynamically adapt their architecture and module configuration to the switching and processing requirements of the network traffic. Such adaptability allows for unprecedented flexibility in balancing the number of required nodal components in the network, spectral resource usage, and length of the established paths. To investigate these trade-offs and achieve cost-efficient network operation, we formulate the routing, modulation, and spectrum assignment (RMSA) problem in AoD-based EONs and propose three RMSA strategies aimed at optimizing a particular combination of these performance indicators. The strategies rely on a newly proposed internal node configuration matrix that models the structure of optical white box nodes in the network, thus facilitating hardware-aware routing of connection demands. The proposed strategies are evaluated in terms of the number of required modules and the related cost, spectral resource usage, and average path length. Extensive simulation results show that the proposed RMSA strategies can achieve remarkable cost savings by requiring fewer switching modules than the benchmarking approaches, at a favorable trade-off with spectrum usage and path length.

Place, publisher, year, edition, pages
Optical Society of America, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-234941 (URN)10.1364/JOCN.10.000723 (DOI)000446303800003 ()2-s2.0-85054495106 (Scopus ID)
Note

QC 20180918

Available from: 2018-09-13 Created: 2018-09-13 Last updated: 2018-10-23Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5600-3700

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