Editorial for the special issue on Energy-efficient Networking
International Journal of Communication Systems
Fueled by the increasing popularity of the Internet and evermore bandwidth-hungry services, networking technologies constitute one of the most fast growing areas in the field of the IT industry. This fast growth has led to a point where the energy expenditure of networking infrastructure constitutes a significant portion of the total energy expenditure and moreover, the trend is towards an additional increase. Thus, the development of energy efficient networking technologies for the backbone
... access parts of today's Internet has recently emerged as a significant research area. The primary focus of such green technologies, is towards reduction of the energy footprint of the networking infrastructure, thus enabling sustainable development, low operational costs and environmental safety. The objective of this special issue is to report state-ofthe art results in energy-efficient networking protocols and architectures. In the context of this effort, we are happy having received 19 papers from all over the world. Each paper was reviewed by at least three qualified reviewers. The review process completed with 8 papers accepted. The acceptance rate for this issue is thus about 47 percent. The articles in this special issue are organized as follows. The first article, entitled "Energy-minimized design of IP over flexible optical networks" and authored by Vasileios Gkamas, Konstantinos Christodoulopoulos, Dimitrios J. Vergados and Emmanouel Varvarigos, addresses the energy-minimized design problem for IP over flexible optical networks. The authors propose an energy-aware multilayer network-planning algorithm, which takes as input the network topology, the IP end-to-end traffic matrix, the modular model of the IP/MPLS routers, and the feasible configurations of the flexible optical transponders and whose objective is to minimize the network's energy consumption, jointly accounting for the energy consumption of the routers' modules installed, the transponders used, and their configurations. The second article, entitled "An Energy-efficient History based Routing Scheme for Opportunistic Networks" and authored by Sanjay K. Dhurandher, Deepak Kumar Sharma, Isaac Woungang and Aakanksha Saini, addresses routing and forwarding in opportunistic networks. The paper proposes proposes improvements in the existing history-based prediction routing protocols for such networks so as to make them energy efficient. The proposed protocol addresses the energy constraints and reduces the number of packets transferred in the network, which in turn results to a reduction in the nodes' energy consumption. The third article is entitled "Energy Efficient Error Coding and Transmission for Cognitive Wireless Body Area Network" and is authored by Najam ul Hasan, Waleed Ejaz, Mahin K. Atiq and Hyung Seok Kim. It proposes a cognitive forward error control mechanism for Wireless Body Area Networks with energy efficiency. The proposed approach works via adaptively selecting the number of hops to the sink and adjusts the redundancy to minimize the expected latency and energy consumption.