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Special Issue on

Cooperative and Cognitive paradigms for Green HetNets

IEEE Wireless Communications Magazine

Special issue on "Cooperative and Cognitive paradigms for Green HetNets" The world is becoming an energy conscious society having a profound impact on today's digital revolution. One of the biggest impediments of future wireless communications systems is the need to limit the energy consumption of battery-driven devices so as to prolong the operational times and to avoid active cooling. In fact, without new approaches for energy saving, there is a significant threat that 4G mobile users will be searching for power outlets rather than network access, and becoming once again bound to the pre-historic world of fixed line communications. If we are to maintain market sustainability, then there is a clear need for prolonged battery lifetime: the word mobile is taken as de facto, in that users have the freedom to roam around and be connected to the best available technology at any time; however, if preventive measures are not taken to conserve energy, then users could be restricted to the nearest power supply falling victim to the so called "Energy Trap". Green Terminals for the future network have the aim to avoid falling victim to the energy trap of 4G mobile systems in HetNets by investigating and demonstrating energy saving technologies for multi-standard wireless mobile devices, exploiting the combination of cognitive radio and cooperative strategies while still maintaining the required performance in terms of data rate and QoS to support active applications. The joint application of these two technologies in HetNets has led towards new paradigms in network design and deployment for energy saving, providing a stepping stone towards economic and environmental sustainability for the future. This notion is further extended by investigating lightweight security approaches, which are a pivotal requirement when the wireless link goes beyond the trusted circle of users and involves a foreign proxy device that requires new ways of managing confidentiality, integrity and authentication.

Scope of Contributions
This special issue includes different aspects on green HetNets ranging from radio protocols to energy efficient networking topologies, and lightweight security. This special issue will bring together academic and industrial researchers to identify and discuss technical challenges and recent results related to cognitive radios and cooperative strategies for energy savings on the mobile terminal side, as well as on the network side. This special issue focuses on the state-ofthe- art research and development in various aspects of cooperative and cognitive radio technologies for saving energy for next generation HetNets. Original, unpublished contributions and survey/tutorial type articles will be considered for the special issue. The topics of interest for the special issue include, but are not limited to:

Manuscript Submission
Authors must follow the IEEE Wireless Communications Magazine guidelines for preparation of the manuscript. For further details, please refer to "Submission Guidelines" in IEEE Wireless Communications Magazine website at: http://www.comsoc.org/wirelessmag/paper-submission-guidelines. Papers must be submitted in an all-in-one PDF format to Manuscript Central http://mc.manuscriptcentral.com/ieee-wcm. An paper should have no more than 4500 words, no more than 6 tables/figures, and its abstract should have no more than 250 words. Any submission that fails to comply the guidelines will be rejected without review.

Important Dates:
Submission Deadline: April 15 2013
Acceptance Notification: July 20 2013
Final Manuscript Due: September 1, 2013
Publication: October 2013

Guest Editors:
Dr. Shahid Mumtaz (smumtaz@av.it.pt), Instituto de Telecomunicacões, Portugal
Prof Lie-Liang Yang (ll-yang@ieee.org), University of Southampton
Prof Kwang-Cheng Chen (chenkc@cc.ee.ntu.edu.tw), National Taiwan University Prof
Xianbin Wang (xianbin.wang@uwo.ca), University of Western Ontario Prof. Abd-Elhamid M. Taha (ataha@alfaisal.edu), Alfaisal University, Riyadh, KSA