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Publications (10 of 156) Show all publications
Natalino, C., Idzikowski, F., Chiaraviglio, L., Wosinska, L. & Monti, P. (2019). Energy- and fatigue-aware RWA in optical backbone networks. Optical Switching and Networkning Journal, 31, 193-201
Open this publication in new window or tab >>Energy- and fatigue-aware RWA in optical backbone networks
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2019 (English)In: Optical Switching and Networkning Journal, ISSN 1573-4277, E-ISSN 1872-9770, Vol. 31, p. 193-201Article in journal (Refereed) Published
Abstract [en]

Connection provisioning in Wavelength Division Multiplexing (WDM) networks needs to account for a number of crucial parameters. On the one hand, operators need to ensure the connection availability requirements defined in Service Level Agreements (SLAs). This is addressed by selecting an appropriate amount of backup resources and recovery strategies for the connections over which services are provisioned. Services requiring less strict availability requirements can be routed over unprotected lightpaths. Services with more strict availability requirements are provisioned over protected lightpaths in order to cope with possible failures in the network. Another important aspect to consider during the provisioning process is energy efficiency. Green strategies leverage on setting network devices in Sleep Mode (SM) or Active Mode (AM) depending on whether or not they are needed to accommodate traffic. However, frequent power state changes introduce thermal fatigue which in turn has a negative effect on the device lifetime. Finally, in multi-period traffic scenarios, it is also important to minimize the number of reconfigurations of lightpaths already established in the network in order to avoid possible traffic disruptions at higher layers. The work presented in this paper tackles the connection provisioning paradigm in an optical backbone network with a multi-period traffic scenario. More specifically the paper looks into the interplay among (i) energy efficiency, (ii) thermal fatigue, and (iii) lightpath reconfiguration aspects. To this end, the Energy and Fatigue Aware Heuristic with Unnecessary Reconfiguration Avoidance (EFAH-URA) is introduced, showing that it is possible to balance the three aspects mentioned above in an efficient way. When compared to the pure energy-aware strategies, EFAH-URA significantly improves the average connection availability for both unprotected and protected connections. On the other hand, it is done at the expense of reduced energy saving.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
Acceleration factor, Connection availability, Device lifetime, Green provisioning, Lightpath reconfiguration, Optical backbone network operation, Thermal fatigue
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-241188 (URN)10.1016/j.osn.2018.10.007 (DOI)000454380100016 ()2-s2.0-85056257635 (Scopus ID)
Note

QC 20190121

Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-01-21Bibliographically approved
Sgambelluri, A., Dugeon, O., Muhammad, A., Martin-Perez, J., Ubaldi, F., Sevilla, K., . . . Paolucci, F. (2019). Orchestrating QoS-based Connectivity Services in a Multi-Operator Sandbox. Journal of Optical Communications and Networking, 11(2), A196-A208
Open this publication in new window or tab >>Orchestrating QoS-based Connectivity Services in a Multi-Operator Sandbox
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2019 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 11, no 2, p. A196-A208Article in journal (Refereed) Published
Abstract [en]

One of the main features of 5G networks is the coordinated orchestration of both information technology (IT) and connectivity resources. This enables the deployment of a flexible and programmable architecture able to provision end-to-end services with different (and sometimes quite) stringent quality of service (QoS) constraints. In this paradigm, service orchestration may take place over single or multiple administrative domains. The 5G Exchange (5GEx) project, building on the software-defined network and the network function virtualization (NFV) concepts, targets the design and the implementation of a multi-domain orchestrator (MdO) prototype for the automatic provisioning of network service across multiple administrative domains. This paper presents an architectural solution, designed and implemented in the context of the 5GEx MdO prototype, that can be used to establish end-to-end connectivity tunnels with QoS constraints (i.e., bandwidth and/or end-to-end delay) connecting virtualized network functions deployed in remote data centers controlled by different providers by means of an innovative stateful backward recursive path-computation-element based computation procedure. The proposed solution has been experimentally validated in terms of scalability, reliability, and end-to-end workflow proof-of-concept. Results show how the designed solution permits the automatic establishment of QoS-based end-to-end tunnels spanning across multi-technology and multi-operator network domains. The orchestration scheme does not present scalability issues for either the advertisement of resources or for the provisioning of connectivity services. Moreover, no issues have been identified from the reliability point of view.

Place, publisher, year, edition, pages
OPTICAL SOC AMER, 2019
Keywords
5GEx project, Backward recursive PCE-based computation (BRPC), Multi-domain orchestration, Network function virtualization, QoS-based connectivity services, Software defined network, Value added services
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-247844 (URN)10.1364/JOCN.11.00A196 (DOI)000460735200009 ()2-s2.0-85062692565 (Scopus ID)
Note

QC 20190326

Available from: 2019-03-26 Created: 2019-03-26 Last updated: 2019-03-26Bibliographically approved
Wiatr, P., Chen, J., Monti, P., Wosinska, L. & Yuan, D. (2019). Routing and wavelength assignment vs. EDFA reliability performance in optical backbone networks: An operational cost perspective. Optical Switching and Networkning Journal, 31, 211-217
Open this publication in new window or tab >>Routing and wavelength assignment vs. EDFA reliability performance in optical backbone networks: An operational cost perspective
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2019 (English)In: Optical Switching and Networkning Journal, ISSN 1573-4277, E-ISSN 1872-9770, Vol. 31, p. 211-217Article in journal (Refereed) Published
Abstract [en]

A failure in optical backbone network can cause tremendous consequences as a substantial number of connections often each carrying a large amount of data can be interrupted. Therefore, high reliability performance is essential for the network operators. Many existing works that aim at improving network reliability performance implicitly assume that the lifetime of devices is constant and independent of the traffic load. However, the reliability performance of a device is related to its occupancy. For example, the failure rate of erbium doped fiber amplifier (EDFA) can be expressed as a function of the number of amplified wavelengths. On the other hand, the choice of routing and wavelength assignment (RWA) algorithm impacts the link load and, as a consequence, can influence the number of EDFA failures in the network. In this paper we examine how RWA can impact the failure reparation related network operational costs. Several types of RWA approaches are considered, namely load-balancing, energy-awareness, and reliability-awareness. Among all the considered RWA algorithms, the reliability-aware RWA (RA-RWA) approach leverages on EDFA reliability profile to reduce the number of EDFA failures in the network and the related operational costs. The simulation results show that the RWA algorithm impacts in a significant way the operational costs caused by EDFA failures. The cost associated with reparation of an EDFA decreases by 7.8% (in case of RA-RWA) and increases by up to 40% (in case of a load-balancing approach) compared to the classical Shortest Path (SP) approach. Moreover, the cost caused by connection rerouting due to link unavailability triggered by EDFA failure exhibits a 20% decrease (RA-RWA) and up to 94% increase (energy-aware algorithm). We also analyze some key network performance metrics that may be affected by RWA, including blocking probability, link occupancy distribution, and path length.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
Device reliability performance, Device reliability profile, Routing and wavelength assignment (RWA), Erbium doped fiber amplifier (EDFA), Optical backbone networks
National Category
Computer Systems
Identifiers
urn:nbn:se:kth:diva-241190 (URN)10.1016/j.osn.2018.10.005 (DOI)000454380100018 ()2-s2.0-85056245448 (Scopus ID)
Note

QC 20190121

Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-01-21Bibliographically approved
Raza, M. R., Natalino, C., Öhlen, P., Wosinska, L. & Monti, P. (2018). A Slice Admission Policy Based on Reinforcement Learning for a 5G Flexible RAN. In: : . Paper presented at 44th European Conference and Exhibition on Optical Communication (ECOC).
Open this publication in new window or tab >>A Slice Admission Policy Based on Reinforcement Learning for a 5G Flexible RAN
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2018 (English)Conference paper, Published paper (Refereed)
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-235258 (URN)
Conference
44th European Conference and Exhibition on Optical Communication (ECOC)
Note

QC 20180920

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2018-10-19Bibliographically approved
Yaghoubi, F. (2018). A Techno-Economic Framework for 5G Transport Networks. IEEE wireless communications, 25(5), pp. 56-63
Open this publication in new window or tab >>A Techno-Economic Framework for 5G Transport Networks
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2018 (English)In: IEEE wireless communications, ISSN 1536-1284, E-ISSN 1558-0687, Vol. 25, no 5, p. 56-63Article in journal, News item (Refereed) Published
Abstract [en]

Wireless heterogeneous networks (HetNets) are a cost- and energy-efficient alternative to provide high capacity to end users in the future 5G communication systems. However, the transport segment of a RAN poses a big challenge in terms of cost and energy consumption. In fact, if not planned properly, its resulting high cost might limit the benefits of using small cells and impact the revenues of mobile network operators. Therefore, it is essential to be able to properly assess the economic viability of different transport technologies as well as their impact on the cost and profitability of a HetNet deployment (i.e., RAN plus transport). This article first presents a general and comprehensive techno-economic framework able to assess not only the TCO but also the business viability of a HetNet deployment. The framework is then applied to the specific case study of a backhaul-based transport segment. In the evaluation work two technology options for the transport network are considered (i.e., microwave and fiber) assuming both a homogeneous (i.e., macrocells only) and a HetNet deployment. Our results demonstrate the importance of selecting the right technology and deployment strategy in order not to impact the economic benefits of a HetNet deployment. Moreover, the results also reveal that a deployment solution with the lowest TCO does not always lead to the highest profit.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-244610 (URN)
Note

QC 20190304

Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-03-04Bibliographically approved
Yaghoubi, F., Mahloo, M., Wosinska, L., Monti, P., Farias, F. d., Weyl Albuquerque Costa, J. C. & Chen, J. (2018). A TECHNO-ECONOMIC FRAMEWORK FOR 5G TRANSPORT NETWORKS. IEEE wireless communications, 25(5), 56-63
Open this publication in new window or tab >>A TECHNO-ECONOMIC FRAMEWORK FOR 5G TRANSPORT NETWORKS
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2018 (English)In: IEEE wireless communications, ISSN 1536-1284, E-ISSN 1558-0687, Vol. 25, no 5, p. 56-63Article in journal (Refereed) Published
Abstract [en]

Wireless heterogeneous networks (HetNets) are a cost- and energy-efficient alternative to provide high capacity to end users in the future 5G communication systems. However, the transport segment of a RAN poses a big challenge in terms of cost and energy consumption. In fact, if not planned properly, its resulting high cost might limit the benefits of using small cells and impact the revenues of mobile network operators. Therefore, it is essential to be able to properly assess the economic viability of different transport technologies as well as their impact on the cost and profitability of a HetNet deployment (i.e., RAN plus transport). This article first presents a general and comprehensive techno-economic framework able to assess not only the TCO but also the business viability of a HetNet deployment. The framework is then applied to the specific case study of a backhaul-based transport segment. In the evaluation work two technology options for the transport network are considered (i.e., microwave and fiber) assuming both a homogeneous (i.e., macrocells only) and a HetNet deployment. Our results demonstrate the importance of selecting the right technology and deployment strategy in order not to impact the economic benefits of a HetNet deployment. Moreover, the results also reveal that a deployment solution with the lowest TCO does not always lead to the highest profit.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-239826 (URN)10.1109/MWC.2018.1700233 (DOI)000450162600009 ()2-s2.0-85056548451 (Scopus ID)
Note

QC 20181217

Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-04-09Bibliographically approved
Raza, M. R., Natalino, C., Vidal, A., Santos, M., Öhlen, P., Wosinska, L. & Monti, P. (2018). Demonstration of Resource Orchestration Using Big Data Analytics for Dynamic Slicing in 5G Networks. In: : . Paper presented at 44th European Conference and Exhibition on Optical Communication (ECOC).
Open this publication in new window or tab >>Demonstration of Resource Orchestration Using Big Data Analytics for Dynamic Slicing in 5G Networks
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2018 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

We present a proof-of-concept demonstration of an SDN/NFV-based orchestrator for sharing infrastructure resources among different tenants. The designed orchestrator maximizes the profit of an infrastructure provider by using a dynamic slicing approach based on big data analytics.

National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-231958 (URN)
Conference
44th European Conference and Exhibition on Optical Communication (ECOC)
Note

QC 20180808

Available from: 2018-07-05 Created: 2018-07-05 Last updated: 2018-09-19Bibliographically approved
Regis, G. B., Fonseca, K. V., Figueiredo, G. B., Monti, P., Wosinska, L. & De Santi, J. (2018). Differentiated Restoration Based Multipath Re-Provisioning for Disaster Recovery in EONs. 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 8422784.
Open this publication in new window or tab >>Differentiated Restoration Based Multipath Re-Provisioning for Disaster Recovery in EONs
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2018 (English)In: 2018 IEEE International Conference on Communications (ICC), Institute of Electrical and Electronics Engineers (IEEE), 2018, article id 8422784Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we propose a new restoration algorithm for disaster recovery in Elastic Optical Networks (EONs). The algorithm considers the different requirements on restoration delay and bandwidth degradation while restoring over multiple routes. Furthermore, the algorithm is able to adapt the connection recover process to the post-disaster network conditions and, consequently, increase the number of restored connections. Results indicate that the proposed strategy is able to improve connections restorability and decrease bandwidth blocking probability when compared to restoration approach based on bandwidth degradation and multipath recovery.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-234106 (URN)10.1109/ICC.2018.8422784 (DOI)2-s2.0-85051428252 (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 20180904

Available from: 2018-09-04 Created: 2018-09-04 Last updated: 2018-09-04Bibliographically approved
Osorio, C., Udalcovs, A., Barreto, A. N., Monti, P., Ozolins, O. & Mello, D. A. A. (2018). Dual-Mode Distance-Adaptive Transceiver Architecture for 5G Optical Fiber Fronthaul. In: Aboltins, A (Ed.), 2018 ADVANCES IN WIRELESS AND OPTICAL COMMUNICATIONS (RTUWO): . Paper presented at 2018 ADVANCES IN WIRELESS AND OPTICAL COMMUNICATIONS (RTUWO) (pp. 29-32). IEEE
Open this publication in new window or tab >>Dual-Mode Distance-Adaptive Transceiver Architecture for 5G Optical Fiber Fronthaul
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2018 (English)In: 2018 ADVANCES IN WIRELESS AND OPTICAL COMMUNICATIONS (RTUWO) / [ed] Aboltins, A, IEEE , 2018, p. 29-32Conference paper, Published paper (Refereed)
Abstract [en]

We propose a transceiver architecture for 5G fronthaul that adapts the modulation format according to the channel quality. The proposed solution operates in dual-mode using digital signal processing (DSP)-assisted analog radio-over-fiber (A-RoF) and digital radio-over-fiber (D-RoF) with multiple modulation orders. The system performance is assessed through Monte-Carlo simulations of the optical fiber link conveying wireless waveforms that utilize the filter bank multicarrier (FBMC) and orthogonal frequency-division multiplexing (OFDM) formats. The simulation results highlight the benefits of having both digital and DSP-assisted analog transmission capabilities to optimize the reach versus spectral efficiency trade-off in optical fronthaul.

Place, publisher, year, edition, pages
IEEE, 2018
Keywords
5G, C-RAN, fronthaul, radio-over-fiber, transceiver
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-249836 (URN)000462986300006 ()
Conference
2018 ADVANCES IN WIRELESS AND OPTICAL COMMUNICATIONS (RTUWO)
Note

QC 20190423

Available from: 2019-04-23 Created: 2019-04-23 Last updated: 2019-04-23Bibliographically approved
Raza, M. R., Fiorani, M., Rostami, A., Öhlen, P., Wosinska, L. & Monti, P. (2018). Dynamic Slicing Approach for Multi-Tenant 5G Transport Networks. Paper presented at Optical Fiber Communications Conference and Exhibition (OFC), Mar 19-23, 2017, Los Angeles, CA. Journal of Optical Communications and Networking, 10(1), A77-A90
Open this publication in new window or tab >>Dynamic Slicing Approach for Multi-Tenant 5G Transport Networks
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2018 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 10, no 1, p. A77-A90Article in journal (Refereed) Published
Abstract [en]

Software defined networking allows network providers to share their physical network (PN) among multiple tenants by means of network slicing, where several virtual networks (VNs) are provisioned on top of the physical one. In this scenario, PN resource utilization can be improved by introducing advanced orchestration functionalities that can intelligently assign and redistribute resources among the slices of different tenants according to the temporal variation of the VN resource requirements. This is a concept known as dynamic slicing. This paper presents a solution for the dynamic slicing problem in terms of both mixed integer linear programming formulations and heuristic algorithms. The benefits of dynamic slicing are compared against static slicing, i.e., an approach without intelligent adaptation of the amount of resources allocated to each VN. Simulation results show that dynamic slicing can reduce the VN rejection probability by more than 1 order of magnitude compared to static slicing. This can help network providers accept more VNs into their infrastructure and potentially increase their revenues. The benefits of dynamic slicing come at a cost in terms of service degradation (i.e., when not all the resources required by a VN can be provided), but the paper shows that the service degradation level introduced by the proposed solutions is very small.

Place, publisher, year, edition, pages
Optical Society of America, 2018
Keywords
5G transport, Dynamic slicing, IP over WDM, Multi-tenant networks, Network virtualization, Software defined networking
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-223287 (URN)10.1364/JOCN.10.000A77 (DOI)000424046200011 ()2-s2.0-85042273286 (Scopus ID)
Conference
Optical Fiber Communications Conference and Exhibition (OFC), Mar 19-23, 2017, Los Angeles, CA
Funder
EU, Horizon 2020, 671636VINNOVA, Kista 5G Transport Lab (K5) project
Note

QC 20180219

Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-11-23Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5636-9910

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