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Publisher: Institute of Electrical and Electronics Engineers (IEEE)   (Total: 176 journals)

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Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 75, SJR: 1.337, h-index: 85)
Affective Computing, IEEE Transactions on     Hybrid Journal   (Followers: 9, SJR: 1.824, h-index: 16)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Bell Labs Technical J.     Hybrid Journal   (Followers: 9, SJR: 0.411, h-index: 26)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16, SJR: 1.462, h-index: 14)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 14, SJR: 1.184, h-index: 118)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 5, SJR: 1.314, h-index: 53)
Canadian J. of Electrical and Computer Engineering     Full-text available via subscription   (Followers: 7, SJR: 0.119, h-index: 14)
China Communications     Full-text available via subscription   (Followers: 4, SJR: 0.189, h-index: 6)
Communications and Networks, J. of     Hybrid Journal   (Followers: 4, SJR: 0.364, h-index: 23)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 13, SJR: 0.638, h-index: 14)
Computational Intelligence and AI in Games, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Computer     Full-text available via subscription   (Followers: 38, SJR: 0.717, h-index: 112)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 13, SJR: 0.579, h-index: 40)
Control Systems     Hybrid Journal   (Followers: 24, SJR: 0.83, h-index: 75)
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 23)
Emerging and Selected Topics in Circuits and Systems     Hybrid Journal   (Followers: 4, SJR: 0.63, h-index: 8)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 21, SJR: 2.458, h-index: 139)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4, SJR: 0.808, h-index: 19)
IEEE Access     Open Access   (Followers: 5)
IEEE Aerospace and Electronic Systems Magazine     Full-text available via subscription   (Followers: 44, SJR: 0.402, h-index: 35)
IEEE Annals of the History of Computing     Full-text available via subscription   (Followers: 12, SJR: 0.134, h-index: 13)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 15, SJR: 0.757, h-index: 57)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 14, SJR: 1.499, h-index: 54)
IEEE Circuits and Systems Magazine     Full-text available via subscription   (Followers: 27, SJR: 0.737, h-index: 32)
IEEE Communications Letters     Hybrid Journal   (Followers: 18, SJR: 1.19, h-index: 96)
IEEE Communications Magazine     Full-text available via subscription   (Followers: 26, SJR: 3.196, h-index: 144)
IEEE Communications Surveys & Tutorials     Hybrid Journal   (Followers: 10, SJR: 3.561, h-index: 52)
IEEE Computational Intelligence Magazine     Full-text available via subscription   (Followers: 12, SJR: 2.066, h-index: 26)
IEEE Computer Architecture Letters     Hybrid Journal   (Followers: 18, SJR: 0.871, h-index: 14)
IEEE Computer Graphics and Applications     Full-text available via subscription   (Followers: 12, SJR: 0.501, h-index: 62)
IEEE Consumer Electronics Magazine     Full-text available via subscription   (Followers: 17)
IEEE Control Systems Magazine     Full-text available via subscription   (Followers: 31)
IEEE Design & Test     Full-text available via subscription   (Followers: 16)
IEEE Distributed Systems Online     Full-text available via subscription   (Followers: 5)
IEEE Electrical Insulation Magazine     Full-text available via subscription   (Followers: 8, SJR: 0.577, h-index: 41)
IEEE Electromagnetic Compatibility Magazine     Full-text available via subscription   (Followers: 5)
IEEE Electron Device Letters     Full-text available via subscription   (Followers: 5, SJR: 2.191, h-index: 105)
IEEE Engineering in Medicine and Biology Magazine     Full-text available via subscription   (Followers: 5)
IEEE Engineering Management Review     Full-text available via subscription   (Followers: 11, SJR: 0.11, h-index: 9)
IEEE Geoscience and Remote Sensing Letters     Hybrid Journal   (Followers: 16, SJR: 1.481, h-index: 46)
IEEE Industrial Electronics Magazine     Full-text available via subscription   (Followers: 18, SJR: 2.105, h-index: 27)
IEEE Industry Applications Magazine     Full-text available via subscription   (Followers: 5, SJR: 0.67, h-index: 36)
IEEE Instrumentation & Measurement Magazine     Full-text available via subscription   (Followers: 18, SJR: 0.245, h-index: 26)
IEEE Intelligent Systems     Full-text available via subscription   (Followers: 23, SJR: 0.941, h-index: 79)
IEEE Internet Computing     Full-text available via subscription   (Followers: 13, SJR: 1.044, h-index: 79)
IEEE J. of Biomedical and Health Informatics     Hybrid Journal   (Followers: 8, SJR: 1.157, h-index: 61)
IEEE J. of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 12)
IEEE J. of Oceanic Engineering     Hybrid Journal   (Followers: 6, SJR: 0.687, h-index: 63)
IEEE J. of Quantum Electronics     Hybrid Journal   (Followers: 16, SJR: 1.594, h-index: 98)
IEEE J. of Selected Topics in Quantum Electronics     Hybrid Journal   (Followers: 6, SJR: 2.588, h-index: 114)
IEEE J. of Selected Topics in Signal Processing     Hybrid Journal   (Followers: 16, SJR: 2.705, h-index: 45)
IEEE J. of Solid-State Circuits     Full-text available via subscription   (Followers: 16, SJR: 3.574, h-index: 144)
IEEE J. of the Electron Devices Society     Open Access   (Followers: 2)
IEEE J. of Translational Engineering in Health and Medicine     Open Access   (Followers: 2)
IEEE J. on Selected Areas in Communications     Hybrid Journal   (Followers: 6, SJR: 3.335, h-index: 165)
IEEE Latin America Transactions     Full-text available via subscription   (Followers: 2, SJR: 0.162, h-index: 7)
IEEE Micro     Full-text available via subscription   (Followers: 5, SJR: 1.506, h-index: 67)
IEEE Microwave and Wireless Components Letters     Hybrid Journal   (Followers: 7, SJR: 1.915, h-index: 87)
IEEE Microwave Magazine     Full-text available via subscription   (Followers: 12, SJR: 0.59, h-index: 41)
IEEE Multimedia     Full-text available via subscription   (Followers: 8, SJR: 0.639, h-index: 47)
IEEE Network     Full-text available via subscription   (Followers: 16, SJR: 1.796, h-index: 80)
IEEE Pervasive Computing     Full-text available via subscription   (Followers: 11, SJR: 0.923, h-index: 69)
IEEE Photonics Technology Letters     Hybrid Journal   (Followers: 4, SJR: 1.805, h-index: 111)
IEEE Potentials     Full-text available via subscription   (Followers: 2, SJR: 0.153, h-index: 18)
IEEE Power and Energy     Full-text available via subscription   (Followers: 12, SJR: 1.671, h-index: 45)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 6)
IEEE Revista Iberoamericana de Tecnologias del Aprendizaje     Hybrid Journal   (Followers: 1, SJR: 0.1, h-index: 3)
IEEE Robotics & Automation Magazine     Full-text available via subscription   (Followers: 21, SJR: 1.09, h-index: 51)
IEEE Security & Privacy Magazine     Full-text available via subscription   (Followers: 17, SJR: 0.588, h-index: 44)
IEEE Sensors J.     Hybrid Journal   (Followers: 50, SJR: 0.733, h-index: 56)
IEEE Signal Processing Letters     Hybrid Journal   (Followers: 16, SJR: 1.016, h-index: 82)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 36, SJR: 1.831, h-index: 106)
IEEE Software     Full-text available via subscription   (Followers: 39, SJR: 0.842, h-index: 72)
IEEE Spectrum     Full-text available via subscription   (Followers: 43, SJR: 0.191, h-index: 48)
IEEE Systems J.     Hybrid Journal   (Followers: 8, SJR: 1.034, h-index: 17)
IEEE Technology and Society Magazine     Full-text available via subscription   (Followers: 4, SJR: 0.348, h-index: 17)
IEEE Transactions on Advanced Packaging     Full-text available via subscription   (Followers: 5, SJR: 0.598, h-index: 52)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 11, SJR: 1.837, h-index: 118)
IEEE Transactions on Applied Superconductivity     Hybrid Journal   (Followers: 1, SJR: 0.46, h-index: 54)
IEEE Transactions on Audio, Speech, and Language Processing     Hybrid Journal   (Followers: 12)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 26, SJR: 2.992, h-index: 175)
IEEE Transactions on Automation Science and Engineering     Full-text available via subscription   (Followers: 10, SJR: 1.287, h-index: 35)
IEEE Transactions on Biomedical Circuits and Systems     Hybrid Journal   (Followers: 5, SJR: 1.876, h-index: 29)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 5, SJR: 1.47, h-index: 124)
IEEE Transactions on Circuits and Systems I: Regular Papers     Hybrid Journal   (Followers: 11, SJR: 1.406, h-index: 68)
IEEE Transactions on Circuits and Systems II: Express Briefs     Hybrid Journal   (Followers: 10, SJR: 0.932, h-index: 53)
IEEE Transactions on Cloud Computing     Hybrid Journal   (Followers: 7)
IEEE Transactions on Communications     Hybrid Journal   (Followers: 10, SJR: 2.035, h-index: 150)
IEEE Transactions on Components and Packaging Technologies     Full-text available via subscription   (Followers: 9, SJR: 0.71, h-index: 50)
IEEE Transactions on Computational Social Systems     Full-text available via subscription  
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems     Hybrid Journal   (Followers: 6, SJR: 0.77, h-index: 83)
IEEE Transactions on Computers     Hybrid Journal   (Followers: 19, SJR: 0.768, h-index: 81)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 17, SJR: 0.731, h-index: 69)
IEEE Transactions on Control of Network Systems     Hybrid Journal  
IEEE Transactions on Control Systems Technology     Hybrid Journal   (Followers: 23, SJR: 1.543, h-index: 87)
IEEE Transactions on Cybernetics     Hybrid Journal   (Followers: 7)
IEEE Transactions on Dependable and Secure Computing     Hybrid Journal   (Followers: 11, SJR: 0.866, h-index: 36)
IEEE Transactions on Device and Materials Reliability     Hybrid Journal   (Followers: 14, SJR: 0.785, h-index: 45)
IEEE Transactions on Dielectrics and Electrical Insulation     Hybrid Journal   (Followers: 5, SJR: 0.635, h-index: 71)

        1 2 | Last

Journal Cover   IEEE Communications Magazine
  [SJR: 3.196]   [H-I: 144]   [26 followers]  Follow
    
   Full-text available via subscription Subscription journal
   ISSN (Print) 0163-6804
   Published by Institute of Electrical and Electronics Engineers (IEEE) Homepage  [176 journals]
  • IEEE Communications Magazine - cover
    • Abstract: Presents the front cover for this issue of the magazine.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Global Communications Newsletter
    • Authors: Behmann; F.;Rak, J.;Sterbenz, J.P.G.;Shen, G.;Papadimitriou, D.;Walkowiak, K.;Bellalta, B.;Skoric, M.;Magedanz, T.;
      Pages: 1 - 4
      Abstract: Presents key events and topics in the global communications industry.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Table of contents
    • Pages: 2 - 4
      Abstract: Presents the table of contents for this issue of this magazine.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Education and training: The third pillar of comsoc [The President's Page]
    • Authors: Benedetto; S.;Ben, K.;Zorzi, L.M.;
      Pages: 6 - 8
      Abstract: This month???s President???s Page is devoted to the initiatives and plans of the IEEE Communications Society (ComSoc) in the area of education and training. Enhancing the IEEE societies??? activities in the area of education and training is one of the strategic goals of IEEE, and it has been recognized as such also by ComSoc???s strategic and planning committee (see the January 2015 President???s Page). Education and training can be developed as the third pillar of ComSoc???s major technical activities and a revenue source to complement the two existing pillars: publications and conferences.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Candidates announced for board of governors election [Society News]
    • Authors: Bhargava; V.;
      Pages: 10 - 18
      Abstract: Presents a listing of the Communications Society candidates announced for board of governors election.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Society members named to IEEE fellow grade [Society News]
    • Pages: 20 - 23
      Abstract: Lists IEEE Communications Society members who were elevated to the status of IEEE Fellow.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Book reviews [2 Books Reviewed]
    • Authors: Cholda; P.;Janowski, L.;Bajic, E.;
      Pages: 24 - 25
      Abstract: The following books are reviewed: Commercial Data Mining: Processing, Analysis and Modeling for Predictive Analytics Projects (Nettleton, D.; 2014); Machine-to-Machine Communications: Architectures, Technology, Standards, and Applications (Misic, V.B.; 2014).
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Conference calendar
    • Pages: 26 - 26
      Abstract: Provides a notice of upcoming conference events of interest to practitioners and researchers.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Emerging applications, services and engineering for [Guest Editorial]
    • Authors: Shakir; M.Z.;Dobre, O.A.;Imran, M.A.;Papathanassiou, A.;Zhang, Z.;Vasilakos, A.V.;Wang, H.;Harada, H.;
      Pages: 32 - 34
      Abstract: The rapid advancements in wireless communications are expected to increase the demand for radio spectrum resources by orders of magnitude during the next decade. This problem must be addressed using technology and regulatory innovations for significant improvements in spectrum utilization in cellular networks. Emerging cognitive radio technology has been identified as a high-impact disruptive innovation that could provide solutions to the cellular traffic congestion problems and exploit the underutilized spectral resources to pave an application-driven path toward the next generation of cellular technology.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Dynamic spectrum aggregation for future 5G communications
    • Authors: Bogucka; H.;Kryszkiewicz, P.;Kliks, A.;
      Pages: 35 - 43
      Abstract: We discuss dynamic spectrum aggregation methods, opportunities, and issues for future 5G communication in cognitive cellular networks. We focus on multicarrier technologies, which have been recognized as capable of flexible utilization of fragmented spectrum opportunities in unlicensed frequency bands, such as enhanced NC-OFDM and NC-FBMC. These techniques can be applied to shape the signal spectrum so that it is concentrated within used frequency bands, and the out-of-band transmitted power and associated interference generated to the incumbent coexisting systems are limited. We present key issues associated with spectrum aggregation that are recognized at the transmitter and the receiver. We also discuss solutions of these issues that can make spectrum aggregation viable for 5G systems.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Large-scale cognitive cellular systems: resource management overview
    • Authors: Guizani; M.;Khalfi, B.;Ghorbel, M.B.;Hamdaoui, B.;
      Pages: 44 - 51
      Abstract: This article presents recent advancements in resource management for large-scale DSA systems. Although the problem of spectrum and power allocation is well addressed in the literature, the need for more efficient algorithms still persists due to the exponential growth of the number of wireless devices. Thus, developing efficient distributed approaches has become an attractive solution that can follow the systems??? rapid growth. Despite the number of economicdriven methods that have been presented, such as game theoretic solutions, these methods still rely on excessive information exchange, which results in high delays. Inspired by the success of behavioral techniques, mainly learning and filtering approaches, applications of these techniques to spectrum management have attracted more interest due to their distributivity and minimal requirements of information exchange.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Matching theory for future wireless networks: fundamentals and
           applications
    • Authors: Gu; Y.;Saad, W.;Bennis, M.;Debbah, M.;Han, Z.;
      Pages: 52 - 59
      Abstract: The emergence of novel wireless networking paradigms such as small cell and cognitive radio networks has forever transformed the way in which wireless systems are operated. In particular, the need for self-organizing solutions to manage the scarce spectral resources has become a prevalent theme in many emerging wireless systems. In this article, the first comprehensive tutorial on the use of matching theory, a Nobel Prize winning framework, for resource management in wireless networks is developed. To cater for the unique features of emerging wireless networks, a novel, wireless-oriented classification of matching theory is proposed. Then the key solution concepts and algorithmic implementations of this framework are exposed. The developed concepts are applied in three important wireless networking areas in order to demonstrate the usefulness of this analytical tool. Results show how matching theory can effectively improve the performance of resource allocation in all three applications discussed.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Cooperative heterogeneous framework for spectrum harvesting in cognitive
           cellular network
    • Authors: Zhang; N.;Zhou, H.;Zheng, K.;Cheng, N.;Mark, J.W.;Shen, X.(.;
      Pages: 60 - 67
      Abstract: With the proliferation of mobile devices and emerging data-hungry applications, mobile data has been increasing dramatically. To accommodate massive mobile data, the cellular network has been straining to meet the need due to the scarcity of spectrum. As a promising technology, cognitive radio can be leveraged by the cellular network to harvest spectrum holes on demand. By employing cognitive radio, the cellular network becomes a cognitive cellular network. In this article, we first provide an overview of the cognitive cellular network, including the network architecture and main applications. Then existing spectrum harvesting approaches are reviewed, and the limitations are identified. To better explore spectrum access opportunities, three types of cooperation-based approaches are introduced for different scenarios, based on which an integrated cooperative framework is devised to fully harvest spectrum holes. Simulation results are provided to evaluate the performance of the proposed cooperative approaches.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • An evolution toward cognitive cellular systems: licensed shared access for
           network optimization
    • Authors: Mustonen; M.;Matinmikko, M.;Palola, M.;Yrj??l??, S.;Horneman, K.;
      Pages: 68 - 74
      Abstract: This article reviews the application of the recent European Licensed Shared Access (LSA) concept for spectrum sharing between a mobile network operator (MNO) and an incumbent user. LSA, as a new area of application of cognitive technology, provides the MNO an opportunity to access new frequency resources on a shared basis. The article presents critical design criteria of LSA from the MNO point of view in order to allow future cognitive cellular networks to efficiently exploit shared spectrum bands. We describe the role of LSA bands in the context of heterogeneous networking, and identify the Long Term Evolution (LTE) and LTE-Advanced enabling technologies that support the introduction of LSA. Such technologies include traffic steering, carrier aggregation, and self-organizing networking. Additionally, we introduce an LSA management unit controlled by the MNO, to be implemented on top of the existing LTE/LTEAdvanced architecture, and we discuss the functionalities required for the optimization and automation of LSA resource management. We also depict the interrelations of the tasks between the LSA management unit and the supporting LTE/LTE-Advanced technologies. Based on the findings in this article, the ongoing cellular system evolution is shown to form a solid base for the introduction of new shared spectrum bands for cognitive cellular systems.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Network economics in cognitive networks
    • Authors: Jiang; C.;Chen, Y.;Liu, K.J.R.;Ren, Y.;
      Pages: 75 - 81
      Abstract: Cellular networks are confronted with unprecedented pressure to accommodate the dramatically increasing demands of mobile Internet. This phenomenon is principally due to the restricted spectrum resource and low-efficiency spectrum management. Recently, cognitive radio technology has been corroborated to significantly improve spectrum utilization efficiency. In order to enhance the spectrum management efficiency in cellular networks, the concept of ???cognitive cellular networks??? was introduced. It has been realized that the network architecture, algorithms, and protocols cannot be simply designed without considering the socio-economic aspects involved. In this article, we consider the economic issues in cognitive cellular networks from the perspectives of game theoretic modeling and mechanism design. Specifically, both the simultaneous and sequential dynamic spectrum access games are investigated, respectively. The mechanism design related issues (i.e., spectrum auction, pricing, and contract) to ensure desired outcomes are introduced with detailed applications in cognitive cellular networks. The goal of this article is to provide an overview to understand the motivation, problem formulation, methodology, and solutions of the economic issues in cognitive cellular networks.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Business modeling for TV white space networks
    • Authors: Luo; Y.;Gao, L.;Huang, J.;
      Pages: 82 - 88
      Abstract: Database-assisted TV white space network is a promising paradigm of dynamic spectrum sharing, and can effectively improve spectrum utilization and alleviate spectrum scarcity via centralized control of TV white space databases residing in the cloud. In this article, we discuss business modeling for a database-assisted TV white space network, which is very important for wide commercialization of this promising technology. Motivated by several recent business practices, we propose and study two types of different business models: spectrum market and information market. In the spectrum market model, spectrum licensees, through spectrum brokers acted by databases, lease the underutilized (licensed) TV channels to unlicensed wireless devices for secondary utilization. In the information market model, databases sell the advanced information regarding (unlicensed) TV channels to unlicensed wireless devices in order to enhance the secondary spectrum utilization performance. We outline the corresponding trading mechanism details for both market models, and evaluate the feasibility and performance of both models through theoretical and numerical studies. Numerical results indicate that both the database operator???s profit and the total network profit can be significantly improved under properly designed trading mechanisms.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Full duplex communications [Guest Editorial]
    • Authors: Li; G.Y.;Bennis, M.;Yu, G.;
      Pages: 90 - 90
      Abstract: With the rapidly growing demand for mobile applications, future wireless networks are facing considerable challenges in spectral efficiency. To deal with it, many techniques have been developed recently. Among them, in-band full duplex (IBFD), which enables a device to transmit and receive simultaneously at the same frequency, has ignited great interest from both academia and industry. IBFD can potentially double the spectral efficiency in the physical layer and also bring many advantages in high-layer design. However, to fulfill the minimum performance requirement for the current cellular networks, self-interference cancellation in IBFD communications is still a great challenge to the physical layer design. In addition, some system-level protocols must be redesigned since devices need to send and receive signals at the same frequency simultaneously.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Recent advances in antenna design and interference cancellation algorithms
           for in-band full duplex relays
    • Authors: Heino; M.;Korpi, D.;Huusari, T.;Antonio-Rodriguez, E.;Venkatasubramanian, S.;Riihonen, T.;Anttila, L.;Icheln, C.;Haneda, K.;Wichman, R.;Valkama, M.;
      Pages: 91 - 101
      Abstract: In-band full-duplex relays transmit and receive simultaneously at the same center frequency, hence offering enhanced spectral efficiency for relay deployment. In order to deploy such full-duplex relays, it is necessary to efficiently mitigate the inherent self-interference stemming from the strong transmit signal coupling to the sensitive receive chain. In this article, we present novel state-of-the-art antenna solutions as well as digital self-interference cancellation algorithms for compact MIMO fullduplex relays, specifically targeted for reduced-cost deployments in local area networks. The presented antenna design builds on resonant wavetraps and is shown to provide passive isolations on the order of 60???70 dB. We also discuss and present advanced digital cancellation solutions, beyond classical linear processing, specifically tailored against nonlinear distortion of the power amplifier when operating close to saturation. Measured results from a complete demonstrator system, integrating antennas, RF cancellation, and nonlinear digital cancellation, are also presented, evidencing close to 100 dB of overall self-interference suppression. The reported results indicate that building and deploying compact full-duplex MIMO relays is already technologically feasible.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Electrical balance duplexing for small form factor realization of in-band
           full duplex
    • Authors: Laughlin; L.;Beach, M.A.;Morris, K.A.;Haine, J.L.;
      Pages: 102 - 110
      Abstract: Transceiver architectures utilizing various self-interference suppression techniques have enabled simultaneous transmission and reception at the same frequency. This full-duplex wireless offers the potential for a doubling of spectral efficiency; however, the requirement for high transmit-to-receive isolation presents formidable challenges for the designers of full duplex transceivers. Electrical balance in hybrid junctions has been shown to provide high transmit- to-receive isolation over significant bandwidths. Electrical balance duplexers require just one antenna, and can be implemented on-chip, making this an attractive technology for small form factor devices. However, the transmit-toreceive isolation is sensitive to antenna impedance variation in both the frequency domain and time domain, limiting the isolation bandwidth and requiring dynamic adaptation. Various contributions concerning the implementation and performance of electrical balance duplexers are reviewed and compared, and novel measurements and simulations are presented. Results demonstrate the degradation in duplexer isolation due to imperfect system adaptation in user interaction scenarios, and requirements for the duplexer adaptation system are discussed.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Medium access control design for full duplex wireless systems: challenges
           and approaches
    • Authors: Thilina; K.M.;Tabassum, H.;Hossain, E.;Kim, D.I.;
      Pages: 112 - 120
      Abstract: Recent advances in self-interference cancellation techniques enable in-band full-duplex (FD) transmission in which a wireless node can simultaneously transmit and receive in the same frequency band. However, to fully exploit the benefits of FD technology in a wireless network, in addition to the physical (PHY) layer issues, medium access control (MAC) layer issues such as inter-node collisions, fairness between halfduplex (HD) and FD users, opportunistic selection of different modes of FD transmission, and synchronization issues need to be resolved. To this end, this article first discusses the fundamental concepts, potential benefits, and primary network topologies of FD transmission. We then highlight immediate challenges (both in the PHY and MAC layers) that need to be addressed in designing FD wireless systems. A qualitative comparison among the existing full-duplex MAC (FD-MAC) protocols is then provided. Finally, the primary requirements and research issues for the design of FD-MAC protocols are discussed, and implications of FD technology in cellular wireless networks are highlighted.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Full duplex cellular systems: will doubling interference prevent doubling
           capacity?
    • Authors: Goyal; S.;Liu, P.;Panwar, S.S.;Difazio, R.A.;Yang, R.;Bala, E.;
      Pages: 121 - 127
      Abstract: Recent advances in antenna and RF circuit design have greatly reduced the crosstalk between the transmitter and receiver circuits on a wireless device, which enable radios to transmit and receive on the same frequency at the same time. Such a full duplex radio has the potential to double the spectral efficiency of a point-to-point radio link. However, the application of such a radio in current cellular systems (3GPP LTE) has not been comprehensively analyzed. This article addresses the fundamental challenges in incorporating full duplex radios in a cellular network to unlock the full potential of full duplex communications. We observe that without carefully planning, full duplex transmission might cause much higher interference in both uplink and downlink, which greatly limits the potential gains. Another challenge is that standard scheduling methods which attempt to achieve the maximum capacity gain lead to a severe loss in energy efficiency. In this article, we identify new tradeoffs in designing full duplex enabled radio networks, and discuss favorable conditions to operate in full duplex mode. New scheduling algorithms and advanced interference cancellation techniques are discussed, which are essential to maximize the capacity gain and energy efficiency. Under this new design, most of the gain is achievable with full duplex enabled base stations, while user equipment still operates in half duplex mode.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Full duplex techniques for 5G networks: self-interference cancellation,
           protocol design, and relay selection
    • Authors: Zhang; Z.;Chai, X.;Long, K.;Vasilakos, A.V.;Hanzo, L.;
      Pages: 128 - 137
      Abstract: The wireless research community aspires to conceive full duplex operation by supporting concurrent transmission and reception in a single time/frequency channel for the sake of improving the attainable spectral efficiency by a factor of two as compared to the family of conventional half duplex wireless systems. The main challenge encountered in implementing FD wireless devices is that of finding techniques for mitigating the performance degradation imposed by self-interference. In this article, we investigate the potential FD techniques, including passive suppression, active analog cancellation, and active digital cancellation, and highlight their pros and cons. Furthermore, the troubles of FD medium access control protocol design are discussed for addressing the problems such as the resultant end-to-end delay and network congestion. Additionally, an opportunistic decode-andforward- based relay selection scheme is analyzed in underlay cognitive networks communicating over independent and identically distributed Rayleigh and Nakagami-m fading channels in the context of FD relaying. We demonstrate that the outage probability of multi-relay cooperative communication links can be substantially reduced. Finally, we discuss the challenges imposed by the aforementioned techniques and a range of critical issues associated with practical FD implementations. It is shown that numerous open challenges, such as efficient SI suppression, high-performance FD MAC-layer protocol design, low power consumption, and hybrid FD/HD designs, have to be tackled before successfully implementing FD-based systems.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Full duplex cognitive radio: a new design paradigm for enhancing spectrum
           usage
    • Authors: Liao; Y.;Song, L.;Han, Z.;Li, Y.;
      Pages: 138 - 145
      Abstract: With the rapid growth of demand for ever increasing data rates, spectrum resources have become more and more scarce. As a promising technique to increase the efficiency of the spectrum utilization, cognitive radio has great potential to meet such a requirement by allowing unlicensed users to coexist in licensed bands. In conventional CR systems, spectrum sensing is performed at the beginning of each time slot before data transmission. Unfortunately, this results in two major problems: transmission time reduction due to sensing, and sensing accuracy impairment due to data transmission. To tackle these problems, in this article we present a new design paradigm for future CR by exploring full duplex techniques to achieve simultaneous spectrum sensing and data transmission. With FD radios equipped at secondary users (SUs), the SUs can simultaneously sense and access the vacant spectrum, and thus significantly improve sensing performance while increasing data transmission efficiency. The aim of this article is to transform the promising conceptual framework into a practical wireless network design by addressing a diverse set of challenges such as protocol design and theoretical analysis. Several application scenarios with FD-enabled CR are elaborated, and key open research directions and novel algorithms in these systems are discussed.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Exploiting full duplex for device-to-device communications in
           heterogeneous networks
    • Authors: Wang; L.;Tian, F.;Svensson, T.;Feng, D.;Song, M.;Li, S.;
      Pages: 146 - 152
      Abstract: In this article, we discuss full duplex for heterogenous networks that accommodate the coexistence of device-to-device communications. The short link distance and lower transmit power of device-to-device communications make them excellent candidates to exploit full duplex inband transmission. By incorporating power allocation for self-interference cancellation based on antenna isolation, analog cancellation, and digital cancellation, full-duplex device-to-device, FD-D2D, nodes can potentially improve spectrum efficiency in HetNets. We provide a comprehensive overview on FD-D2D communications in Het-Nets. Additionally, we identify several challenges, provide potential solutions to interference mitigation based on power control, beamforming, and resource scheduling, and further discuss applications of FD in 5G networks.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Technologies and applications of future satellite networking [Guest
           Editorial]
    • Authors: Sacchi; C.;Bhasin, K.;Kadowaki, N.;Vong, F.;
      Pages: 154 - 155
      Abstract: The second part of the Feature Topic ???Satellite Communications and Networking: Emerging Techniques and New Applications,??? published in this issue of IEEE Communications Magazine, presents the overflow from the first part published in the March issue. In the first part, the accent was on a renewed vision of satellite communications and networking that we claim as ???Space 2.0??? [1] in order to mark a clear discontinuity with the ???Space 1.0??? era, begun in 1945 with A.C. Clarke???s article ???Extra Terrestrial Relays.??? The contributions published in the first part mainly focused on techniques that will characterize future satellite networking, such as exploitation of higher frequency bands, cognitive spectrum utilization, delay- and disruption-tolerant networks (DTNs), software-defined networking (SDN), and network virtualization. In the remaining part of the Feature Topic, we aim at shifting the emphasis to the application aspects without losing sight of technological investigation.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Challenges for efficient and seamless space-terrestrial heterogeneous
           networks
    • Authors: Choi; J.P.;Joo, C.;
      Pages: 156 - 162
      Abstract: By interconnecting satellites in the sky with ground stations on earth, space-terrestrial networks can extend the coverage area and increase the throughput for both commercial and nonprofit applications. To realize the seamless and economic sky-to-earth networks, we still have to advance the technologies that bridge different types of channels, and find killer-applications that are essential for our life. In this article we review the current state-of-the-art technologies of multibeam satellites and relaying as fundamental cornerstones, and then address the issues of low-latency random access, mobility support, and multipath protocols for realizing a seamless heterogeneous network. We then illustrate two impactful applications: for emergency communication as a near-future and non-profit application, and for simultaneous transmission of information and power as a long-term application.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Design challenges in contact plans for disruption-tolerant satellite
           networks
    • Authors: Fraire; J.A.;Finochietto, J.M.;
      Pages: 163 - 169
      Abstract: During the past 20 years, space communications technologies have shown limited progress in comparison to Internet-based networks on Earth. However, a brand new working group of the IETF with focus on DTN promises to extend today???s Internet boundaries to embrace disruptive communications such as those seen in space networks. Nevertheless, several challenges need to be overcome before operative DTNs can be deployed in orbit. We analyze the state of the art of effective design, planning, and implementation of the forthcoming network communications opportunities (contacts). To this end, different modeling techniques, system constraints, selection criteria, and methods are reviewed and compared. Finally, we discuss the increasing complexity of considering routing and traffic information to enrich the planning procedure, yielding the need to implement a contact plan computation element to support space DTN operation.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Emergency satellite communications: research and standardization
           activities
    • Authors: Pecorella; T.;Ronga, L.S.;Chiti, F.;Jayousi, S.;Franck, L.;
      Pages: 170 - 177
      Abstract: Space communications is an ideal candidate to handle critical and emergency situations arising on a regional to global scale, provided there is effective integration among them. The article presents a review of solutions offered by space communication systems for early warning and emergency communication services. It includes an up-to-date review of public research and standardization activity in the field, with a specific focus on mass alert. The main technical issues and challenges are also discussed along with the cutting-edge research from the scientific community.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Alerting over satellite navigation systems: lessons learned and future
           challenges
    • Authors: Cola; T.D.;Niebla, C.P.;
      Pages: 178 - 185
      Abstract: Public warning in emergency situations has experienced great momentum in recent years due to the increasing need for suitable communication means to disseminate alerts due to the increasing number of natural and technological disasters, as well as the consequent damage created and number of people affected by them. This goes along with a number of activities that promote multi-channel approaches to make use of different communication channels to disseminate alerts. However, only a little work has been performed so far considering the use of satellite communications in the last mile within a multichannel architecture for alerting purposes. This article addresses the feasibility and impact of deploying alert message services over satellite navigation systems.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Flexible heterogeneous satellite-based architecture for enhanced quality
           of life applications
    • Authors: Re; E.D.;Morosi, S.;Ronga, L.S.;Jayousi, S.;Martinelli, A.;
      Pages: 186 - 193
      Abstract: The future pervasive communication ecosystem can improve and enhance the quality of our everyday lives by increasing comfort and safety perception, and improving interaction and conditions of activities: remarkable quality and performance will be afforded by the synergistic use of communication, positioning, and monitoring techniques, provided by means of meshed heterogeneous architectures based on satellite and terrestrial segments. In such a scenario satellite communication will represent the missing link of the evolution of services. This article aims to describe a flexible architecture that could be adopted in the future system and discussing the open points in the development of the system as well as of its single building blocks.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Communications education and training: industry certification and
           university accreditation [Guest Editorial]
    • Authors: Michelson; D.G.;Tong, W.;Reeves, L.;
      Pages: 194 - 195
      Abstract: Student design competitions have emerged as a popular method for both professional associations and companies to engage engineering students and encourage them to join with like-minded colleagues to develop and test their engineering design and project management skills. By their nature, such competitions encourage a level and intensity of activity that is difficult to replicate in a design or project course. For many engineering students, participation can be a career-defining event.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • The canadian satellite design challenge: building future engineering
           capability in canadian universities
    • Authors: Reeves; L.A.;
      Pages: 196 - 198
      Abstract: The CSDC is a Canadian university competition to design and build a small satellite, called a ???cubesat,??? which will conduct a science mission. The CSDC simulates a real-world engineering project, requiring the multi-disciplinary teams to prepare mandatory documentation, and give a detailed design review in front of industry experts. The CSDC also includes mentored ???hands-on??? workshops, providing a valuable career-development educational experience.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Pioneering the application of diamagnetic materials for spacecraft
           attitude control
    • Authors: Curran; J.;Hussman, C.;
      Pages: 200 - 201
      Abstract: Developed by a student team at the University of Victoria, the ECOSat2 cube satellite is a demonstration platform for communications and attitude control technologies useful in small satellites. Its scientific payload is an experimental attitude control actuator that uses a diamagnetic material called pyrolytic graphite. We seek to demonstrate that this diamagnetic effect can be used to control the attitude of small satellites in Earth orbit, and thereby inspire research into developing materials with stronger diamagnetic properties and further their use in spacecraft control.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Testing a self-healing material in microgravity using a 3U cubesat
    • Authors: Sabzalian; M.;Whatley, J.;Parmentier, N.;Elawad, A.;
      Pages: 202 - 204
      Abstract: Space Concordia, a student society from Concordia University, has designed and built a 3U CubeSat named Aleksandr as their entry into the 2014 CSDC. The satellite, once deployed, will test the properties of a self-healing carbon composite by performing a three-point bending test in space, and thereby assess its viability for use in space applications. The engineering model of the satellite payload met all CSDC testing requirements and placed second in the competition. Space Concordia now aims to expand and refine Aleksandr to participate in the upcoming CSDC.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Obtaining infrared spectral imagery of the upper atmosphere using a
           cubesat
    • Authors: Menezes; K.;Gomes, T.;
      Pages: 205 - 207
      Abstract: The mission of the Canadian Satellite Design Team at York University is to develop a Cubesat payload that will use the AURORA line scan camera to obtain infrared spectral imagery of the upper atmosphere. The imagery will be used to assess the concentration of greenhouse gases in the atmosphere and thereby advance our understanding of climate change. The team comprises a diverse group of students with a variety of backgrounds. The manner in which our group has been organized and the facilities that we have obtained access to will be a critical factor in our ultimate success.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Monitoring glaciers from space using a cubesat
    • Authors: Fod??; C.;Panerati, J.;Desroches, P.;Valdatta, M.;Beltrame, G.;
      Pages: 208 - 210
      Abstract: The ??cole Polytechnique de Montr??al and the University of Bologna recently collaborated to develop a nanosatellite mission in the context of the 2012???2014 iteration of the Canadian Satellite Design Challenge, an inter-university competition intended for the development of space expertise among graduate and undergraduate students. The mission comprised two different scientific payloads: one aiming at monitoring climate changes in the Arctic, and the other addressing the need to reduce space debris. Here we report the organizational and technical challenges we faced, as well as the lessons we learned.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Biological investigations using a triple-cubesat
    • Authors: Dubois; C.;Glowacki, P.;Byagowi, A.;
      Pages: 211 - 213
      Abstract: The University of Manitoba Space Applications and Technology Society is a student group participating in the Canadian Satellite Design Challenge (CSDC). For the 2012-14 iteration of the CSDC, a diverse team of undergraduate and graduate students worked together to develop TSAT2, a triple-cube nanosatellite weighing under 4 kg. This satellite contains a biological payload with the purpose of exploring the survivability of tardigrades in low Earth orbit. Through participation in the CSDC, student members developed skills not included in their respective curriculums and became better prepared for their careers in industry and academia.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Green communications and computing networks [Series Editorial]
    • Authors: Wu; J.;Thompson, J.;Zhang, H.;Kilper, D.C.;
      Pages: 214 - 215
      Abstract: Environmental issues are increasingly becoming one of central concerns in global societies. The production, application, and disposal of information and communication technology (ICT) platforms and relevant systems may introduce significant environmental problems. These include increasing environmental pollution, the exhaustion of natural resources and energy sources, which motivate us to reduce the negative environmental impact of ICT. On the other hand, ICT may also provide strong tools to solve, mitigate, or reduce environmental problems introduced by a wide range of factors. These topics may be considered as the core contents of ???green ICT.??? Green ICT may profoundly impact the research, development, manufacturing, usage, and disposal processes of ICT systems and applications. The main motivation of green ICT is to support environmental sustainability.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Cyber-physical systems for water sustainability: challenges and
           opportunities
    • Authors: Wang; Z.;Song, H.;Watkins, D.W.;Ong, K.G.;Xue, P.;Yang, Q.;Shi, X.;
      Pages: 216 - 222
      Abstract: Water plays a vital role in the proper functioning of the Earth???s ecosystems, and practically all human activities, such as agriculture, manufacturing, transportation, and energy production. The proliferation of industrial and agricultural activities in modern society, however, poses threats to water resources in the form of chemical, biological, and thermal pollution. On the other hand, tremendous advancements in science and technology offer valuable tools to address water sustainability challenges. Key technologies, including sensing technology, wireless communications and networking, hydrodynamic modeling, data analysis, and control, enable intelligently wireless networked water cyber-physical systems (CPS) with embedded sensors, processors, and actuators that can sense and interact with the water environment. This article provides an overview of water CPS for sustainability from four critical aspects: sensing and instrumentation; communications and networking; computing; and control. The article also explores opportunities and design challenges of relevant techniques.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Macro-assisted data-only carrier for 5G green cellular systems
    • Authors: Zhang; X.;Zhang, J.;Wang, W.;Zhang, Y.;I, C.-L.;Pan, Z.;Li, G.;Chen, Y.;
      Pages: 223 - 231
      Abstract: As the commercial operation of 4G systems is speeding up worldwide to meet the increasingly explosive growth of mobile Internet in the 2020 era, a great many R&D efforts targeting the next generation wireless systems (5G) have been launched. With densely deployed small cells in a heterogeneous network, the excessive signaling overhead of conventional carrier design greatly degrades system performance. A new carrier designed for small cells in the next generation system will be highly beneficial toward a green communication network. In this article, we propose a macro-assisted data-only carrier for future 5G networks from a green prospective. With the help of macro base stations, control channel overhead, and cell-specific reference signals for small cells can be minimized to achieve a pure-data carrier. Under this architecture, key procedures are designed including small cell identification and access, synchronization, hand over, and small cell sleeping. Furthermore, to evaluate the potential of our proposed scheme, a complete system and link-level simulation platform according to the current 3GPP LTE standard is built. The simulation results show that our proposed systems, achieving significant performance enhancement of signaling overhead, can lead to more than 17 percent throughput improvement and 90 percent energy efficiency gain over the current LTE HetNet with on-off strategy implemented. The proposed scheme appears to be highly attractive as part of the future 5G green mobile networks.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Is green networking beneficial in terms of device lifetime?
    • Authors: Chiaraviglio; L.;Wiatr, P.;Monti, P.;Chen, J.;Lorincz, J.;Idzikowski, F.;Listanti, M.;Wosinska, L.;
      Pages: 232 - 240
      Abstract: This article analyzes the impact that sleep mode (SM)-based green strategies have on the reliability performance of optical and cellular network elements. First, we consider a device in isolation (i.e., not plugged into a network in operation), showing how operational temperature and temperature variations, both introduced by SM, impact its lifetime. We then evaluate, from an operational cost perspective, the impact of these lifetime variations, showing that some devices are critical, that is, their achievable energy savings might not cover the potential additional reparation costs resulting from being put in SM too frequently. Moreover, we present a model for evaluating the impact of SM on the lifetime of a device plugged into an operational network. The analysis considers two case studies (one based on the optical backbone and one on cellular networks) showing that the lifetime of a device is influenced by both the hardware parameters, which depend on the specific design of the device, and the SM parameters, which instead depend on the energy-efficient algorithm used, the network topology, and the traffic variations over time. Our results show that (i) the changes in the operational temperature and the frequency of their variation are two crucial aspects to consider while designing a SM-based green strategy, and (ii) the impact of a certain SM-based strategy on the lifetime of network devices is not homogeneous (i.e., it can vary through the network).
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Energy-efficient infrastructure sharing in multi-operator mobile networks
    • Authors: Antonopoulos; A.;Kartsakli, E.;Bousia, A.;Alonso, L.;Verikoukis, C.;
      Pages: 242 - 249
      Abstract: Network infrastructure sharing and base station switching off mechanisms have been recently introduced as promising solutions toward energy and cost reduction in cellular networks. Although these techniques are usually studied independently, their combination offers new alternatives to MNOs for serving their users and could potentially provide them with additional benefits. In this article we introduce the concept of intra-cell roaming-based infrastructure sharing, where the MNOs may switch off their BSs and roam their traffic to active BSs operated by other MNOs in the same cell. Motivated by the coexistence of multiple operators in the same area, we present possible network deployments and architectures in current and future cellular scenarios, discussing their particular characteristics. In addition, we propose an innovative distributed game theoretic BS switching off scheme, employing an integrated cost function that takes into account all the different cases for a given operator to serve its own traffic (i.e. through active BSs of neighboring cells or exploiting intra-cell roaming-based infrastructure sharing). Finally, we demonstrate some indicative simulation results in realistic scenarios to quantify the potential energy and financial benefits that our proposed scheme offers to the MNOs in multioperator environments, providing them with the necessary incentives to participate in the infrastructure sharing.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • A low-cost methodology for profiling the power consumption of network
           equipment
    • Authors: Francini; A.;Fortune, S.;Klein, T.;Ricca, M.;
      Pages: 250 - 256
      Abstract: Rate adaptation technologies aim at establishing a linear relationship between power consumption and traffic load in packet networks. They rely on power profiles of network elements, which map system configurations and traffic loads onto power consumption levels, for the selection of network resources to place into low-power states and to identify new system designs with high power-saving yields. We introduce a methodology for profiling the power consumption of network systems that reconciles modeling accuracy with cost containment and rapidity in the preparation and execution of power measurements. We apply the methodology to network systems from multiple vendors and find it capable of delivering a clear message: the power savings enabled by protocol and system software upgrades that support demandtimescale rate adaptation are worthwhile, but also largely inferior to those attainable with a new generation of hardware platforms that pervasively deploy packet-timescale rate adaptation.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Cost-aware green cellular networks with energy and communication
           cooperation
    • Authors: Xu; J.;Duan, L.;Zhang, R.;
      Pages: 257 - 263
      Abstract: The energy cost of cellular networks is ever increasing to match the surge of wireless data traffic, and savings in this cost is important to reduce the operational expenditure of wireless operators in the future. Recent advancements in renewable energy integration and two-way energy flow in smart grid provide potential new solutions to save cost. However, they also impose challenges, especially on how to use the stochastically and spatially distributed renewable energy harvested at cellular BSs to reliably supply time- and space-varying wireless traffic over cellular networks. To overcome these challenges, in this article we present three approaches, energy cooperation, communication cooperation, and joint energy and communication cooperation, in which different BSs bidirectionally trade or share energy via the aggregator in smart grid, and/or share wireless resources and shift loads with each other to reduce the total energy cost.
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
  • Advertisers??? index
    • Pages: 264 - 264
      PubDate: May 2015
      Issue No: Vol. 53, No. 5 (2015)
       
 
 
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