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Muhammad, Ajmal
Publications (7 of 7) Show all publications
Muhammad, A., Monti, P., Samadi, P., Wosinska, L. & Bergman, K. (2018). Joint Allocation of IT and Connectivity Resources for Survivable Services in Geographically Distributed Metro Data Centers. In: 2017 European Conference on Optical Communication (ECOC): . Paper presented at 43rd European Conference on Optical Communication, ECOC 2017, Gothenburg, Sweden, 17 September 2017 through 21 September 2017 (pp. 1-3). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Joint Allocation of IT and Connectivity Resources for Survivable Services in Geographically Distributed Metro Data Centers
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2018 (English)In: 2017 European Conference on Optical Communication (ECOC), Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 1-3Conference paper, Published paper (Refereed)
Abstract [en]

The paper proposes a survivable and programmable metro-scale converged inter- and intra-datacenter network architecture and exploits its unique features for allocating jointly IT and connectivity resources. The proposed dynamic provisioning strategy offers a substantial reduction of service request blocking.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-228554 (URN)10.1109/ECOC.2017.8345988 (DOI)2-s2.0-85046952783 (Scopus ID)9781538656242 (ISBN)
Conference
43rd European Conference on Optical Communication, ECOC 2017, Gothenburg, Sweden, 17 September 2017 through 21 September 2017
Funder
Swedish Research Council, 2014-6230EU, Horizon 2020, 671636VINNOVA
Note

QC 20180528

Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-05-28Bibliographically approved
Muhammad, A., Sgambelluri, A., Dugeon, O., Martin-Perez, J., Paolucci, F., De Dios, O. G., . . . Monti, P. (2018). On the scalability of connectivity services in a multi-operator orchestrator sandbox. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017. Optics Info Base, Optical Society of America
Open this publication in new window or tab >>On the scalability of connectivity services in a multi-operator orchestrator sandbox
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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]

The paper investigates the performance of a multi-domain orchestrator (MdO) deployed in a real multi-domain European testbed. Results show how the MdO prototype scales well with the number of domains advertised and connectivity services provisioned.

Place, publisher, year, edition, pages
Optics Info Base, Optical Society of America, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-228666 (URN)10.1364/OFC.2018.M2A.2 (DOI)2-s2.0-85047127876 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 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
Yuan, H., Furdek, M., Muhammad, A., Saljoghei, A., Wosinska, L. & Zervas, G. (2018). Space-division multiplexing in data center networks: On multi-core fiber solutions and crosstalk-suppressed resource allocation. Journal of Optical Communications and Networking, 10(4), 272-288
Open this publication in new window or tab >>Space-division multiplexing in data center networks: On multi-core fiber solutions and crosstalk-suppressed resource allocation
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2018 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 10, no 4, p. 272-288Article in journal (Refereed) Published
Abstract [en]

The rapid growth of traffic inside data centers caused by the increasing adoption of cloud services necessitates a scalable and cost-efficient networking infrastructure. Space-division multiplexing (SDM) is considered as a promising solution to overcome the optical network capacity crunch and support cost-effective network capacity scaling. Multi-core fiber (MCF) is regarded as the most feasible and efficient way to realize SDM networks, and its deployment inside data centers seems very likely as the issue of inter-core crosstalk (XT) is not severe over short link spans (<1 km) compared to that in long-haul transmission. However, XT can still have a considerable effect in MCF over short distances,which can limit the transmission reach and in turn the data center's size. XT can be further reduced by bi-directional transmission of optical signals in adjacent MCF cores. This paper evaluates the benefits of MCF-based SDM solutions in terms of maximizing the capacity and spatial efficiency of data center networks. To this end, we present an analytical model for XT in bi-directional normal step-index and trench-assisted MCFs and propose corresponding XT-aware core prioritization schemes. We further develop XT-aware spectrum resource allocation strategies aimed at relieving the complexity of online XT computation. These strategies divide the available spectrum into disjoint bands and incrementally add them to the pool of accessible resources based on the network conditions. Several combinations of core mapping and spectrum resource allocation algorithms are investigated for eight types of homogeneous MCFs comprising 7-61 cores, three different multiplexing schemes, and three data center network topologies with two traffic scenarios. Extensive simulation results showthat combining bi-directional transmission in dense core fibers with tailored resource allocation schemes significantly increases the network capacity. Moreover, a multiplexing scheme that combines SDM and WDM can achieve up to 33 times higher link spatial efficiency and up to 300 times greater capacity compared to a WDM solution.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Keyword
Bi-directional transmission, Data center, Inter-core crosstalk, Link spatial efficiency, Multi-core fiber, Resource allocation algorithm., Cost effectiveness, Crosstalk, Efficiency, Fibers, Light transmission, Resource allocation, Satellite communication systems, Bi-directional transmissions, Data centers, Multi core, Networking infrastructure, Resource allocation algorithms, Resource allocation schemes, Space division multiplexing, Spectrum resource allocations, Space division multiple access
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-227361 (URN)10.1364/JOCN.10.000272 (DOI)000429983800001 ()2-s2.0-85045443560 (Scopus ID)
Note

Export Date: 9 May 2018; Article. QC 20180604

Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2018-06-04Bibliographically approved
Muhammad, A., Skorin-Kapov, N. & Furdek, M. (2017). Manycast, Anycast, and Replica Placement in Optical Inter-Datacenter Networks. Journal of Optical Communications and Networking, 9(12), 1161-1171
Open this publication in new window or tab >>Manycast, Anycast, and Replica Placement in Optical Inter-Datacenter Networks
2017 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 9, no 12, p. 1161-1171Article in journal (Refereed) Published
Abstract [en]

The expanding adoption of cloud-based services in recent years puts stringent requirements on datacenters (DCs) and their interconnection networks. Optical inter-datacenter networks represent the only viable option for satisfying the huge bandwidth required to replicate and update content for cloud-based services across geographically dispersed datacenters. In addition to content replication and synchronization, optical inter-datacenter networks must also support communication between datacenters and end-users. The resulting new traffic patterns and the enormous traffic volumes call for new capacityefficient approaches for inter-datacenter network designs that incorporate both transport and datacenter resource planning. This paper introduces an integrated approach to optimally place content replicas across DCs by concurrently solving the routing and wavelength assignment (RWA) problem for both inter-DC content replication and synchronization traffic following the manycast routing paradigm, and end-user-driven user-to-DC communication following the anycast routing paradigm, with the objective to reduce the overall network capacity usage. To attain this goal, the manycast, anycast, and replica placement (MARP) problem is formulated as an integer linear program to find optimal solutions for smaller problem instances. Due to the problem complexity, a scalable and efficient heuristic algorithm is developed to solve larger network scenarios. Simulation results demonstrate that the proposed integrated MARP strategy can significantly reduce the network capacity usage when compared to the benchmarking replica placement and RWA schemes aimed at minimizing the resources consumed by either of the two types of traffic independently.

Place, publisher, year, edition, pages
Optical Society of America, 2017
Keyword
Anycast routing, Content placement, Interdatacenter networks, Manycast routing
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-221026 (URN)10.1364/JOCN.9.001161 (DOI)000418764400010 ()
Funder
Swedish Research Council, 2014-6230
Note

QC 20180112

Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-01-12Bibliographically approved
Yan, L., Fiorani, M., Muhammad, A., Tornatore, M., Agrell, E. & Wosinska, L. (2017). Network Performance Trade-Off in Optical Spatial Division Multiplexing Data Centers. In: 2017 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC): . Paper presented at Optical Fiber Communications Conference and Exhibition (OFC), MAR 19-23, 2017, Los Angeles, CA. IEEE
Open this publication in new window or tab >>Network Performance Trade-Off in Optical Spatial Division Multiplexing Data Centers
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2017 (English)In: 2017 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), IEEE , 2017Conference paper, Published paper (Refereed)
Abstract [en]

We propose close-to-optimal network resource allocation algorithms for modular data centers using optical spatial division multiplexing. A trade-off between the number of established connections and throughput is identified and quantified.

Place, publisher, year, edition, pages
IEEE, 2017
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-210962 (URN)10.1364/OFC.2017.W3D.5 (DOI)000403405800627 ()2-s2.0-85019853331 (Scopus ID)978-1-943580-23-1 (ISBN)
Conference
Optical Fiber Communications Conference and Exhibition (OFC), MAR 19-23, 2017, Los Angeles, CA
Note

QC 20170713

Available from: 2017-07-13 Created: 2017-07-13 Last updated: 2017-07-13Bibliographically approved
Yan, L., Fiorani, M., Muhammad, A., Tornatore, M., Agrell, E. & Wosinska, L. (2017). Network performance trade-off in optical spatial division multiplexing data centers. In: 2017 Optical Fiber Communications Conference and Exhibition, OFC 2017 - Proceedings: . Paper presented at 2017 Optical Fiber Communications Conference and Exhibition, OFC 2017, 19 March 2017 through 23 March 2017. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Network performance trade-off in optical spatial division multiplexing data centers
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2017 (English)In: 2017 Optical Fiber Communications Conference and Exhibition, OFC 2017 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2017Conference paper (Refereed)
Abstract [en]

We propose close-to-optimal network resource allocation algorithms for modular data centers using optical spatial division multiplexing. A trade-off between the number of established connections and throughput is identified and quantified.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2017
Keyword
Optical fibers, Time division multiplexing, Data centers, Modular data, Optimal networks, Performance trade-off, Spatial Division Multiplexing, Trade off, Optical fiber communication
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-216482 (URN)2-s2.0-85025829686 (Scopus ID)9781943580231 (ISBN)
Conference
2017 Optical Fiber Communications Conference and Exhibition, OFC 2017, 19 March 2017 through 23 March 2017
Note

QC 20171212

Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2017-12-12Bibliographically approved
Furdek, M., Muhammad, A. & Skorin-Kapov, N. (2017). Survivable manycast, anycast and replica placement in optical inter-datacenter networks. In: 2017 19th International Conference on Transparent Optical Networks (ICTON): . Paper presented at 19th International Conference on Transparent Optical Networks, ICTON 2017, Girona, Catalonia, Spain, 2 July 2017 through 6 July 2017. IEEE Computer Society, Article ID 8024994.
Open this publication in new window or tab >>Survivable manycast, anycast and replica placement in optical inter-datacenter networks
2017 (English)In: 2017 19th International Conference on Transparent Optical Networks (ICTON), IEEE Computer Society, 2017, article id 8024994Conference paper, Published paper (Refereed)
Abstract [en]

Inter-datacenter networks need to support datacenter communication with the end-users, as well as content replication and synchronization between datacenters in a reliable manner. This paper presents a survivable manycast, anycast and replica placement strategy for optical inter-datacenter networks resulting in reduced overall network resource consumption.

Place, publisher, year, edition, pages
IEEE Computer Society, 2017
Series
International Conference on Transparent Optical Networks, ISSN 2162-7339
Keyword
anycast routing, Content placement, inter-datacenter networks, manycast routing
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-218538 (URN)10.1109/ICTON.2017.8024994 (DOI)000427031500267 ()2-s2.0-85030990269 (Scopus ID)9781538608586 (ISBN)
Conference
19th International Conference on Transparent Optical Networks, ICTON 2017, Girona, Catalonia, Spain, 2 July 2017 through 6 July 2017
Funder
Swedish Research Council, 2014-6230VINNOVA
Note

QC 20171201

Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2018-04-03Bibliographically approved
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