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Mesodiakaki, A., Adelantado, F., Alonso, L., Renzo, M. D. & Verikoukis, C. (2017). Energy- and Spectrum-Efficient User Association in Millimeter-Wave Backhaul Small-Cell Networks. IEEE Transactions on Vehicular Technology, 66(2), 1810-1821
Open this publication in new window or tab >>Energy- and Spectrum-Efficient User Association in Millimeter-Wave Backhaul Small-Cell Networks
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2017 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 66, no 2, p. 1810-1821Article in journal (Refereed) Published
Abstract [en]

Macrocells are expected to be densely overlaid by small cells (SCs) to meet the increasing capacity demands. Due to their dense deployment, some SCs will not be connected directly to the core network and thus they may forward their traffic to the neighboring SCs until they reach it, thereby forming a multi-hop backhaul (BH) network. This is a promising solution, since the expected short length of BH links enables the use of millimeter wave (mmWave) frequencies to provide high capacity BH. In this context, user association becomes challenging due to the multihop BH architecture and therefore new optimal solutions should be developed. Thus, in this paper, we study the user association problem aiming at the joint maximization of network energy and spectrum efficiency, without compromising the user quality of service. The problem is formulated as an "-constraint problem, which considers the transmit energy consumption both in the access network, i.e., the links between the users and their serving cells, and the BH links. The optimal Pareto front solutions of the problem are analytically derived for different BH technologies and insights are gained into the energy and spectrum efficiency trade-off. The proposed optimal solutions, despite their high complexity, can be used as a benchmark for the performance evaluation of user association algorithms. We also propose a heuristic algorithm, which is compared with reference solutions under different traffic distribution scenarios and BH technologies. Our results motivate the use of mmWave BH, while the proposed algorithm is shown to achieve near-optimal performance.

Place, publisher, year, edition, pages
IEEE Communications Society, 2017
Keywords
Computer architecture;Energy consumption;Macrocell networks;Millimeter wave technology;Quality of service;Signal to noise ratio;Wireless communication;Backhaul;LTE-Advanced;cell selection;context-awareness;green communications;millimeter wave
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-45480 (URN)10.1109/TVT.2016.2565539 (DOI)000395740300073 ()
Available from: 2016-08-30 Created: 2016-08-30 Last updated: 2019-05-20Bibliographically approved
Agapi, M., Zola, E. & Kassler, A. (2017). Joint User Association and Backhaul Routing for Green 5G Mesh Millimeter Wave Backhaul Networks. In: Proceedings Of The 20Th Acm International Conference On Modelling, Analysis And Simulation Of Wireless And Mobile Systems: . Paper presented at 20th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM)21-25 Nov 2017 (pp. 179-186). ASSOC COMPUTING MACHINERY,
Open this publication in new window or tab >>Joint User Association and Backhaul Routing for Green 5G Mesh Millimeter Wave Backhaul Networks
2017 (English)In: Proceedings Of The 20Th Acm International Conference On Modelling, Analysis And Simulation Of Wireless And Mobile Systems, ASSOC COMPUTING MACHINERY, , 2017, p. 179-186Conference paper, Published paper (Refereed)
Abstract [en]

With the advance of fifth generation (5G) networks, network density needs to grow significantly in order to meet the required capacity demands. A massive deployment of small cells may lead to a high cost for providing. ber connectivity to each node. Consequently, many small cells are expected to be connected through wireless links to the umbrella eNodeB, leading to a mesh backhaul topology. This backhaul solution will most probably be composed of high capacity point-to-point links, typically operating in the millimeter wave (mmWave) frequency band due to its massive bandwidth availability. In this paper, we propose a mathematical model that jointly solves the user association and backhaul routing problem in the aforementioned context, aiming at the energy efficiency maximization of the network. Our study considers the energy consumption of both the access and backhaul links, while taking into account the capacity constraints of all the nodes as well as the fulfillment of the service-level agreements (SLAs). Due to the high complexity of the optimal solution, we also propose an energy efficient heuristic algorithm (Joint), which solves the discussed joint problem, while inducing low complexity in the system. We numerically evaluate the algorithm performance by comparing it not only with the optimal solution but also with reference approaches under different traffic load scenarios and backhaul parameters. Our results demonstrate that Joint outperforms the state-of-the-art, while being able to find good solutions, close to optimal, in short time.

Place, publisher, year, edition, pages
ASSOC COMPUTING MACHINERY,, 2017
Series
PROCEEDINGS OF THE 20TH ACM INTERNATIONAL CONFERENCE ON MODELLING, ANALYSIS AND SIMULATION OF WIRELESS AND MOBILE SYSTEMS (MSWIM'17)
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-69109 (URN)10.1145/3127540.3127560 (DOI)000440745600025 ()978-1-4503-5164-5 (ISBN)
Conference
20th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM)21-25 Nov 2017
Available from: 2018-09-07 Created: 2018-09-07 Last updated: 2019-05-27Bibliographically approved
Agapi, M., Zola, E. & Kassler, A. (2017). User Association in 5G Heterogeneous Networks with Mesh Millimeter Wave Backhaul Links. In: 2017 IEEE 18th International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM): . IEEE
Open this publication in new window or tab >>User Association in 5G Heterogeneous Networks with Mesh Millimeter Wave Backhaul Links
2017 (English)In: 2017 IEEE 18th International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM), IEEE, 2017Chapter in book (Other academic)
Abstract [en]

Fifth generation (5G) wireless networks will target at energy and spectrum efficient solutions to cope with the increasing demands in capacity and energy efficiency. To achieve this joint goal, dense networks of small cells (SCs) are expected to overlay the existing macro cells. In parallel, for the SC connection to the core network, a promising solution lies in a mesh network of high capacity millimeter wave backhaul (BH) links. In the considered 5G architecture, each SC is able to forward its BH traffic to the core network through alternative paths, thus offering high BIT network reliability. In this context, the joint problem of user association and HI routing becomes challenging. In this paper, we focus on this problem targeting at energy and spectrum efficient solutions. A low-complexity algorithm is proposed, which bases its user association and BIT routing decision i) on minimizing the spectrum resources to guarantee the user rate, so as to provide high spectrum efficiency, and ii) on minimizing both the access network and BH route power consumption to provide high energy efficiency. Our results show that our solution provides better trade-offs between energy and spectrum efficiency than the state-of-the-art in 3GPP scenarios.

Place, publisher, year, edition, pages
IEEE, 2017
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-66883 (URN)000426952700061 ()978-1-5386-2723-5 (ISBN)
Available from: 2018-03-29 Created: 2018-03-29 Last updated: 2018-06-27Bibliographically approved
Mesodiakaki, A., Zola, E. & Kassler, A. (2017). User Association in 5G Heterogeneous Networks with Mesh Millimeter Wave Backhaul Links. In: 18th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM): . Paper presented at A World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2017 IEEE 18th International Symposium on, Macau, China. IEEE conference proceedings
Open this publication in new window or tab >>User Association in 5G Heterogeneous Networks with Mesh Millimeter Wave Backhaul Links
2017 (English)In: 18th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), IEEE conference proceedings, 2017Conference paper, Published paper (Refereed)
Abstract [en]

Fifth generation (5G) wireless networks will target at energy and spectrum efficient solutions to cope with the increasing demands in capacity and energy efficiency. To achieve this joint goal, dense networks of small cells (SCs) are expected to overlay the existing macro cells. In parallel, for the SC connection to the core network, a promising solution lies in a mesh network of high capacity millimeter wave backhaul (BH) links. In the considered 5G architecture, each SC is able to forward its BH traffic to the core network through alternative paths, thus offering high BH network reliability. In this context, the joint problem of user association and BH routing becomes challenging. In this paper, we focus on this problem targeting at energy and spectrum efficient solutions. A low-complexity algorithm is proposed, which bases its user association and BH routing decision i) on minimizing the spectrum resources to guarantee the user rate, so as to provide high spectrum efficiency, and ii) on minimizing both the access network and BH route power consumption to provide high energy efficiency. Our results show that our solution provides better trade-offs between energy and spectrum efficiency than the state-of-the-art in 3GPP scenarios.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2017
Keywords
5G mobile communication, cellular radio, energy conservation, radio links, telecommunication network routing, telecommunication power management, telecommunication traffic
National Category
Computer Sciences Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-64556 (URN)10.1109/WoWMoM.2017.7974342 (DOI)978-1-5386-2724-2 (ISBN)978-1-5386-2723-5 (ISBN)
Conference
A World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2017 IEEE 18th International Symposium on, Macau, China
Projects
SOCRA (4840)
Funder
Knowledge Foundation
Available from: 2017-10-16 Created: 2017-10-16 Last updated: 2019-05-27Bibliographically approved
Mesodiakaki, A., Adelantado, F., Antonopoulos, A., Alonso, L. & Verikoukis, C. (2016). Energy and spectrum efficient user association in 5G heterogeneous networks. In: Personal, Indoor, and Mobile Radio Communications (PIMRC), 2016 IEEE 27th Annual International Symposium on: . Paper presented at PIMRC 2016 - IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, 4-8 Sept. 2016, Valencia, Spain (pp. 1-6). IEEE conference proceedings
Open this publication in new window or tab >>Energy and spectrum efficient user association in 5G heterogeneous networks
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2016 (English)In: Personal, Indoor, and Mobile Radio Communications (PIMRC), 2016 IEEE 27th Annual International Symposium on, IEEE conference proceedings, 2016, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

Due to the dense small cell deployment to cope with the increased data traffic of fifth generation (5G) networks, the direct backhaul (BH) connection of all small cells to the core network becomes challenging. To that end, millimeter wave (mmWave) is a promising solution for cost-efficient high capacity small cell BH links. However, due to the severe signal attenuation at high frequencies, mmWave can provide good coverage only for short distances, thus favoring a multi-hop 5G BH architecture. In this context, user association that impacts both the network and user performance calls for BH-aware strategies. Hence, in this paper, we study the user association problem aiming at the joint energy and spectrum efficiency maximization of the network, without compromising the user quality of service. The problem is formulated as a generalized assignment problem, which considers the capacity and energy consumption both in the access network and BH links. Provided that the considered problem is shown to be NP-hard, we employ optimization techniques to obtain an upper bound on system performance. We also propose a low complexity algorithm, which is shown to outperform the state-of-the-art while achieving near-optimal performance.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
National Category
Telecommunications Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kau:diva-47788 (URN)10.1109/PIMRC.2016.7794877 (DOI)000391598800326 ()
Conference
PIMRC 2016 - IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, 4-8 Sept. 2016, Valencia, Spain
Available from: 2017-01-30 Created: 2017-01-30 Last updated: 2019-05-20Bibliographically 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
Ramazanali, H., Mesodiakaki, A., Vinel, A. & Verikoukis, C. (2016). Survey of user association in 5G HetNets. In: BOOK GROUP AUTHORS: IEEE (Ed.), Communications (LATINCOM), 2016 8th IEEE Latin-American Conference on: . Paper presented at LATINCOM 2016 - 8th IEEE Latin-American Conference on Communications, 15-17 Nov. 2016, Medellin, Colombia (pp. 1-6). IEEE
Open this publication in new window or tab >>Survey of user association in 5G HetNets
2016 (English)In: Communications (LATINCOM), 2016 8th IEEE Latin-American Conference on / [ed] BOOK GROUP AUTHORS: IEEE, IEEE, 2016, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

Heterogeneous networks (HetNets) are considered a key enabling technology to provide high capacity for next generation, also known as fifth generation (5G), networks. However, in order to efficiently exploit the advantages of HetNets and strive towards high network efficiency, efficient user equipment (UE) association is decisive for targeting network performance goals. Therefore, in this work, user association algorithms are surveyed and classified based on the criterion they use for association with the base stations (macrocells or small cells). Special focus is given on the suitability of the user association algorithms for 5G as well as their complexity.

Place, publisher, year, edition, pages
IEEE, 2016
Keywords
5G mobile communication;Base stations;Complexity theory;Computer architecture;Delays;Interference;Power demand;5G;HetNets;User association;small cells
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Identifiers
urn:nbn:se:kau:diva-47789 (URN)10.1109/LATINCOM.2016.7811565 (DOI)000405491400010 ()978-1-5090-5137-3 (ISBN)
Conference
LATINCOM 2016 - 8th IEEE Latin-American Conference on Communications, 15-17 Nov. 2016, Medellin, Colombia
Available from: 2017-01-30 Created: 2017-01-30 Last updated: 2019-05-20Bibliographically approved
Tennina, S., Santos, M., Mesodiakaki, A., Mekikis, P.-V., Kartsakli, E., Antonopoulos, A., . . . Verikoukis, C. (2016). WSN4QoL: WSNs for remote patient monitoring in e-Health applications. In: 2016 IEEE International Conference on Communications (ICC): . Paper presented at 2016 IEEE International Conference on Communications (ICC), Kuala Lumpur, Malaysia, 22-27 May 2016 (pp. 1-6). IEEE Communications Society
Open this publication in new window or tab >>WSN4QoL: WSNs for remote patient monitoring in e-Health applications
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2016 (English)In: 2016 IEEE International Conference on Communications (ICC), IEEE Communications Society, 2016, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

Contemporary technologies as implemented in the field of healthcare have provided the everyday clinical practice with a plethora of tools to be used in various settings. In this field, distributed and networked embedded systems, such as Wireless Sensor Networks (WSNs), are the most promising technology to achieve continuous monitoring of aged people for their own safety, without affecting their daily activities. WSN4QoL is a Marie Curie project involving academic and industrial partners from three EU countries, which aims to show how new WSNs-based technologies suit the specific requirements of pervasive healthcare applications. In particular, in this paper, the WSN4QoL's system architecture is presented as designed to exploit the Network Coding (NC) mechanisms to achieve energy efficiency in the wireless communications and distributed positioning solutions to locate patients in indoor home environments. The system has been validated through experimental activities using commercial off the shelf (COTS) WSN testbeds and medical devices prototypes offered by a commercial partner. Results demonstrate that NC helps in achieving substantial gains in terms of energy efficiency as compared to traditional relay mechanisms, while the proposed positioning solution is able to locate people in indoor environments at a sub-room accuracy level, without requiring any extra dedicated hardware.

Place, publisher, year, edition, pages
IEEE Communications Society, 2016
Keywords
biomedical communication, energy conservation, indoor environment, network coding, patient monitoring, wireless sensor networks, Marie Curie project, WSN testbeds, WSN-based technologies, WSN4QoL, commercial off the shelf, contemporary technologies, continuous monitoring, distributed positioning, e-Health, energy efficiency, indoor home environments, relay mechanisms, remote patient monitoring, wireless communications, Communication system security, Medical services, Mobile communication, Protocols, Sensors, Wireless communication
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Identifiers
urn:nbn:se:kau:diva-45496 (URN)10.1109/ICC.2016.7511597 (DOI)
Conference
2016 IEEE International Conference on Communications (ICC), Kuala Lumpur, Malaysia, 22-27 May 2016
Available from: 2016-08-30 Created: 2016-08-30 Last updated: 2019-05-20Bibliographically approved
Mesodiakaki, A., Adelantado, F., Alonso, L. & Verikoukis, C. (2015). Performance Analysis of a Cognitive Radio Contention-Aware Channel Selection Algorithm. IEEE Transactions on Vehicular Technology, 64(5), 1958-1972
Open this publication in new window or tab >>Performance Analysis of a Cognitive Radio Contention-Aware Channel Selection Algorithm
2015 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 64, no 5, p. 1958-1972Article in journal (Refereed) Published
Abstract [en]

In cognitive radio (CR) networks, due to the ever increasing traffic demands and the limited spectrum resources, it is very likely for several secondary networks (SNs) to coexist and opportunistically use the same primary user (PU) resources. In such scenarios, the ability to distinguish whether a licensed channel is occupied by a PU or by other SNs can significantly improve the spectrum efficiency of the network, while the contention among the SNs already operating on licensed channels with no PU activity may further affect its throughput and energy efficiency. Therefore, the proper selection of licensed channels could result in notable performance gains. In this paper, we propose a novel contention-aware channel selection algorithm, where the SN under study 1) detects the licensed channels with no PU activity by exploiting cooperative spectrum sensing, 2) estimates the probability of collision in each one, and 3) selects the less contended to access. We provide a detailed analytical model for the throughput and the energy efficiency of the SN, and we validate it by means of simulation. We also show the significant performance gains of our proposal in comparison with other relevant state-of-the-art algorithms.

Place, publisher, year, edition, pages
IEEE Press, 2015
Keywords
Carrier-sense multiple access (CSMA)/CA, cognitive radio (CR), cooperative spectrum sensing, feature detection, green communications, opportunistic spectrum access, spectrum overlay
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-45487 (URN)10.1109/TVT.2014.2341115 (DOI)000354472800025 ()
Available from: 2016-08-30 Created: 2016-08-30 Last updated: 2019-05-20Bibliographically approved
Pons, X., Mesodiakaki, A., Gruet, C., Naviner, L., Adelantado, F., Alonso, L. & Verikoukis, C. (2014). An energy efficient vertical handover decision algorithm. In: 2014 IEEE Globecom Workshops (GC Wkshps): . Paper presented at 2014 IEEE Globecom Workshops (GC Wkshps) (pp. 1145-1150). IEEE conference proceedings
Open this publication in new window or tab >>An energy efficient vertical handover decision algorithm
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2014 (English)In: 2014 IEEE Globecom Workshops (GC Wkshps), IEEE conference proceedings, 2014, p. 1145-1150Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE conference proceedings, 2014
Keywords
mobility management (mobile radio), energy efficient vertical handover decision algorithm, heterogeneous networks, mobile terminals, terminal power consumption, uplink power consumption, wireless communications, Conferences, Energy consumption, Energy efficiency, Handover, IEEE 802.11 Standards, Signal to noise ratio, LTE, Wi-Fi, handover decision algorithm, vertical handover
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-45497 (URN)10.1109/GLOCOMW.2014.7063587 (DOI)978-1-4799-7470-2 (ISBN)
Conference
2014 IEEE Globecom Workshops (GC Wkshps)
Available from: 2016-08-30 Created: 2016-08-30 Last updated: 2019-05-20Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-9309-0524

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