Editorial
Emerging 5G wireless communications envision very high data rates (typically of Gbps order), extremely low latency, significant increase in base station capacity and improvement in users’ perceived Quality of Experience (QoE), compared to current 4G/3G wireless networks. Rapid proliferation of smart devices, increasing number of multimedia and gaming applications, together with a non-linear increase in wireless data (multimedia) usage is already creating a significant burden on existing cellular networks. 5G wireless systems, with improved data rates, capacity, latency, and QoS are expected to alleviate these problems. The major distinctive characteristics in which 5G wireless differs from the traditional wireless systems are the following:
| 1. | Supporting 1∼10 Gbps data rates in real networks, i.e. almost 10 times increase from traditional LTE network's theoretical peak data rate. | ||||
| 2. | A reduced round trip latency of 1ms, i.e. also almost 10 times reduction from 4G's 10ms round trip time. | ||||
| 3. | Allocate high bandwidth in unit area, possibly by exploiting Cognitive Radio, for enabling large number of connected devices for longer durations. | ||||
| 4. | Enormous number of connected devices to realize the vision of IoT. | ||||
| 5. | Ensure complete coverage irrespective of users’ locations. | ||||
| 6. | Reduction in energy usage by development of green technology, even with high data rates and massive connectivity of 5G wireless. | ||||
The scope of this special issue is focused on various research challenges and solutions on different aspects of 5G wireless systems with Cognitive Radio for supporting Massive IoT. There are in total six papers in this special issue dealing with different aspects of 5G wireless. Depending on the different aspects of 5G wireless, the papers in this special issue are classified into four different categories: (a) Cognitive Radio and energy harvesting (two papers) (b) data offloading (one paper), (c) multi-link failure in SDN (one paper), (d) Internet of Things (IoT) (one paper) and (e) network caching (one paper).
The first paper, entitled “Full-Duplex Cooperative Spectrum Sensing with Primary User Activity in Cognitive Radio Networks” explores a Cognitive Radio Network (CRN) using full-duplex communications technology, with several secondary users cooperatively sensing the presence of primary user's activity. Under the assumption of time-slotted CRN transmission and non-time-slotted primary user's transmission, the analysis for false alarm and miss-detection probability are estimated. The second paper, entitled “A Review on Game Theoretic Incentive Mechanisms for Mobile Data Offloading in Heterogeneous Network”, provides a survey of game-theoretic incentives for hybrid access in heterogeneous networks. The authors discuss the mobile offloading models from both the technical perspective and the economic perspective, and review the non-cooperative game theoretic models, cooperative game theoretic models, auction models, and point out major open issues. The third paper, entitled “Scalable and Efficient Forwarding Table Design for Multi-link Failover in Open Flow-enabled Networks” addresses the multi-link failover problem in the Software Defined Network (SDN). Scalability and efficiency are improved using the proposed Flowtable design, which is a quite important issue in an Openflow-based network. The fourth paper, entitled “Hybrid Artificial Bee Colony Algorithm for an Energy Efficient Internet of Things Based on Wireless Sensor Networks” proposes a hybrid artificial bee colony algorithm to solve the scheduling problem for saving power in adhoc networks of simultaneous transmissions. The proposed solution increases effectiveness by scheduling less number of smart devices. The fifth paper, entitled “Social Network Aware Caching for 5G Radio Access Network”, explores a proactive caching scheme by using social ties of mobile users. By exploring users’ behavior and cached content properties, it increases cache efficiency and 5G network capabilities. The sixth and the last paper, entitled “Optimal Operational Parameters for 5G Energy Harvesting Cognitive Wireless Sensor Networks”, fuses Cognitive Radio Network and Wireless Sensor Network by introducing a CR-WSN model, based on energy harvesting in M/M/1 Markovian battery models, with the proposal of a frame structure of the wireless node's charging and sensing time.
The Guest Editorial team would like to thank the authors of all papers submitted (both, those that are accepted and those that unfortunately could not be included) for considering our special issue to disseminate their work. We also would like to warmly thank all the reviewers for their difficult and conscientious work and for the time they spent in reviewing. We also extend our thanks to the IETE and Taylor-&-Francis staffs, in particular Sandeep Kaur Mangat, and the IETE Technical Review's Editor-in-Chief Prof. M. Jagadesh Kumar, for offering us the opportunity to present this special issue. We hope that the readers can use the research results presented in these papers to further enhance their knowledge for research and development in 5G wireless communication systems.
Guest Editorial Team
[Abhishek Roy]: Dr. Abhishek Roy is working as a Principal Engineer in Network System Design lab, Samsung Electronics, Korea. He received the B.E. degree from Jadavpur University, Kolkata, India, in 2000, the M.S. degree from the University of Texas at Arlington, Arlington, TX, USA, in 2002, and the Ph.D. degree from Sungkyunkwan University, Suwon, South Korea, in 2010. His research interests include various aspects of 5G wireless systems, IoT, Smart Grids and network data analytics. He has served as Guest Editor in many reputed International journals and as track chairs and technical program committee members of many international conferences. He has coauthored one book (Taylor & Francis) and has published in almost 50 top-notch international journals. For more details, please visit http://www.abhishekroy.info
[Shamik Sengupta]: Dr. Shamik Sengupta is an Associate Professor in the Department of Computer Science and Engineering and Executive Director of the Cybersecurity Center at University of Nevada, Reno (UNR). His research interests include cognitive radio and DSA networks, game theory, cybersecurity, network economics and self-configuring wireless mesh networks. He has authored over 90 international conferences and journal publications. He is the recipient of an IEEE GLOBECOM 2008 best paper award, and an International Symposium on Performance Evaluation of Computer and Telecommunication Systems 2017 best paper award. He is the recipient of NSF CAREER award in 2012. Shamik serves on the organizing and technical program committee of several IEEE conferences. He is serving in the Editorial Boards of several journals. For more details, please visit: https://www.cse.unr.edu/∼shamik
[Kai Kit Wong]: Dr. Kai-Kit Wong received the BEng, the MPhil, and the PhD degrees, all in Electrical and Electronic Engineering, from the Hong Kong University of Science and Technology, Hong Kong, in 1996, 1998, and 2001, respectively. He is Professor of Wireless Communications at the Department of Electronic and Electrical Engineering, University College London, United Kingdom. He is Fellow of IEEE and IET. His recent research concerns 5G and beyond wireless communications and emerging technologies such as heterogeneous networks, massive MIMO, millimeter-wave communications, full-duplex radios, cognitive radios, physical layer caching and physical layer security. He coauthored papers that won the 2013 IEEE Signal Processing Letters Best Paper Award, and the 2000 IEEE VTS Japan Chapter Award at the IEEE VTC. He has served as Senior Editor for IEEE Communications Letters since 2012 and presently also for IEEE Wireless Communications Letters since 2016. He had also previously served as Associate Editor for IEEE Signal Processing Letters from 2009 to 2012 and Editor for IEEE Transactions on Wireless Communications from 2005 to 2011. He was also Guest Editor for IEEE JSAC SI on virtual MIMO in 2013 and currently the Guest Editor for IEEE JSAC SI on physical layer security for 5G.
[Vaskar Raychoudhury]: Dr. Vaskar Raychoudhury is an Associate Professor in the department of Computer Science and Software Engineering, Miami University, Oxford, Ohio. He received his PhD in Computing from The Hong Kong Polytechnic University in 2010 and thereafter joined Institut Telecom SudParis, in France as a post-doctoral research fellow. He served as an Assistant Professor in the Dept. of Computer Science & Engineering IIT Roorkee, India from 2011 to 2017. From May 2016 to July 2017 he worked as an Alexander von Humboldt Post-doctoral Research Fellow in the Universität Mannheim, Germany. His research interests include Mobile & Pervasive Computing and Networking, Internet-of-Things, Wireless Sensor Networks and Next Generation Networks. He keeps publishing in high-quality journals and conferences in his domain. He has served as program committee member in IEEE PerCom, IEEE Globecom, ICDCN, and many other top conferences. He is a senior member of ACM, a senior member of IEEE and a DAAD Fellow.
[Kannan Govindan]: Dr. Kannan Govindan is working as a senior chief engineer for Samsung R&D Institute India Bangalore. Previously, he worked as postdoctoral researcher in University of California Davis, researcher in General Motors Research India and Scientist in Defence Research and Development Organization India. He completed his PhD in Electrical Engineering from IIT Bombay India in 2009. He serves as Associate Editor in IEEE Communications Magazine and Editor in IETE Technical Review and TPC member of ICC and Globecom regularly. He was also Guest Editor of IEEE Communications special issue on “Wireless for Developments W4D 2016.” He is senior member of IEEE, member of ACM.
[Sukhdeep Singh]: Dr. Sukhdeep Singh received his Integrated Dual Degree (Bachelors and Masters degree) from Jaipur India in June, 2013. He joined Sungkyunkwan University (SKKU) in South Korea as a Ph.D. scholar in Sept. 2013. He worked in diverse fields during his Ph.D., viz. eMBMS scheduling, video delivery architecture for next generation networks, and integrating sociology with Next Generation Mobile Networks and D2D communications. He was awarded Ph.D. degree in Aug. 2016 along with ‘Superior Research Award’ in 2016 from Electrical and Computer Engineering department. He joined Samsung R&D India Bangalore in Sept. 2016. He works in Cloud System design R&D team and is currently working on end to end system design of 5G virtual networks at SRI-B. He is also serving as Technical Program Chair member for IEEE iNIS 2016, IEEE iNIS 2017, and ISRO ICSCE 2017. For more details, please visit http://www.sukhdeepsingh.info