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Future Internet
Special Issues
Green Communications and Networking
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Green Communications and Networking

A special issue of Future Internet (ISSN 1999-5903).

Deadline for manuscript submissions: closed (30 November 2013) | Viewed by 16157

Special Issue Editors

Dr. Jaime Lloret

E-Mail Website
Guest Editor
Integrated Management Coastal Research Institute, Universitat Politecnica de Valencia, 46022 Valencia, Spain
Interests: network protocols; network algorithms; wireless sensor networks; ad hoc networks; multimedia streaming
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Joel J. P. C. Rodrigues

E-Mail Website
Guest Editor
1. Post-Graduation Program on Electrical Engineering, Federal University of Piauí (UFPI), Teresina, Brazil
2. Senior Researcher, Instituto de Telecomunicações, Covilhã, Portugal
Interests: vehicular communications; Internet of Things; eHealth technologies
Special Issues, Collections and Topics in MDPI journals
Dr. Luca Chiaraviglio

E-Mail Website
Co-Guest Editor
Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy
Interests: 5G networks; sustainable computing; energy-efficient networking
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Global warming and climate change have been a growing worldwide concern. Six sources, i.e., transportation, power, buildings, industry, agriculture and forestry, and land use, have been identified as major contributors to the rise of global carbon dioxide (CO2). The mobile industry is seen as a potential enabler to reduce greenhouse gases contributed by these six sources provided that appropriate measures are implemented. On the other hand, the mobile industry itself will also contribute to CO2 emission through network operations, mobile equipments, etc. To meet the requirement of low-carbon economy development, it is necessary to reduce the operation expenditure or energy consumption of mobile networks, while maintaining acceptable quality of service.

This special issue is focused on exploring and seeking new researches, which have not been previously published, on designing, building, and deploying Green Networks. Authors are invited to submit papers from diverse fields including green mobile networks, system architectures, networking & communication protocols, test-bed and prototype, traffic balance and energy-efficient cooperation transmission, system and application issues related to Green Networks.

Prof. Dr. Jaime Lloret
Prof. Dr. Joel Rodrigues
Dr. Luca Chiaraviglio
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Future Internet is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • green communications
  • green networking
  • green mobile networks
  • green protocols

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Published Papers (2 papers)

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Research

16 pages, 346 KiB  
Article
A Novel DOA Estimation Algorithm Using Array Rotation Technique
by Xiaoyu Lan, Liangtian Wan, Guangjie Han and Joel J. P. C. Rodrigues
Future Internet 2014, 6(1), 155-170; https://doi.org/10.3390/fi6010155 - 17 Mar 2014
Cited by 21 | Viewed by 8710
Abstract
The performance of traditional direction of arrival (DOA) estimation algorithm based on uniform circular array (UCA) is constrained by the array aperture. Furthermore, the array requires more antenna elements than targets, which will increase the size and weight of the device and cause [...] Read more.
The performance of traditional direction of arrival (DOA) estimation algorithm based on uniform circular array (UCA) is constrained by the array aperture. Furthermore, the array requires more antenna elements than targets, which will increase the size and weight of the device and cause higher energy loss. In order to solve these issues, a novel low energy algorithm utilizing array base-line rotation for multiple targets estimation is proposed. By rotating two elements and setting a fixed time delay, even the number of elements is selected to form a virtual UCA. Then, the received data of signals will be sampled at multiple positions, which improves the array elements utilization greatly. 2D-DOA estimation of the rotation array is accomplished via multiple signal classification (MUSIC) algorithms. Finally, the Cramer-Rao bound (CRB) is derived and simulation results verified the effectiveness of the proposed algorithm with high resolution and estimation accuracy performance. Besides, because of the significant reduction of array elements number, the array antennas system is much simpler and less complex than traditional array. Full article
(This article belongs to the Special Issue Green Communications and Networking)
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20 pages, 544 KiB  
Article
A Low Energy Consumption DOA Estimation Approach for Conformal Array in Ultra-Wideband
by Liangtian Wan, Lutao Liu, Guangjie Han and Joel J. P. C. Rodrigues
Future Internet 2013, 5(4), 611-630; https://doi.org/10.3390/fi5040611 - 16 Dec 2013
Cited by 6 | Viewed by 6357
Abstract
Most direction-of-arrival (DOA) estimation approaches for conformal array suffer from high computational complexity, which cause high energy loss for the direction finding system. Thus, a low energy consumption DOA estimation algorithm for conformal array antenna is proposed in this paper. The arbitrary baseline [...] Read more.
Most direction-of-arrival (DOA) estimation approaches for conformal array suffer from high computational complexity, which cause high energy loss for the direction finding system. Thus, a low energy consumption DOA estimation algorithm for conformal array antenna is proposed in this paper. The arbitrary baseline direction finding algorithm is extended to estimate DOA for a conformal array in ultra-wideband. The rotation comparison method is adopted to solve the ambiguity of direction finding. The virtual baseline approach is used to construct the virtual elements. Theoretically, the virtual elements can be extended in the space flexibility. Four elements (both actual and virtual elements) can be used to obtain a group of solutions. The space angle estimation can be obtained by using sub-array divided technique and matrix inversion method. The stability of the proposed algorithm can be guaranteed by averaging the angles obtained by different sub-arrays. Finally, the simulation results verify the effectiveness of the proposed method with high DOA estimation accuracy and relatively low computational complexity. Full article
(This article belongs to the Special Issue Green Communications and Networking)
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