Invited Talk by Dr. Rahul Thakur on An Energy Efficient Resource Allocation Technique for Femtocell, Device-to-Device, and IoT Networks
Dense deployment of small cells such as femtocells helps improving the capacity of cellular networks without significantly burdening the operators with huge capital and operational expenditure.However, extremely dense deployment of femtocells comes with the cost of increased co-channel interference and higher energy consumption. To make long-term deployment of femtocells feasible and profitable, we propose an energy efficient cell selection and resource allocation framework. This framework concentrates on the fact that interference, energy consumption,and backhaul capacity are three major hurdles in large-scale femtocells deployments. For resource allocation, we propose a spectrum and power allocation technique called `Spreading’ which minimizes the co-channel interference and maximizes the bandwidth utilization in femtocells. Spreading technique focuses on assigning higher bandwidth to mobile users rather than higher transmit power to satisfy their bitrate requirements. We also propose a novel QoS-aware cell selection scheme that assigns mobile users to femtocells considering the throughput improvement obtained per unit increase in energy consumption. Since femtocells burden the existing ADSL/broadband lines by using them as backhaul, our proposed cell selection scheme also incorporates the energy consumption of the backhaul links and their limited capacity constraint into the cell selection criteria. The proposed Spreading technique, when combined with the proposed cell selection, leads to a significant reduction in energy consumption without any deterioration in the system throughput. Performance improvement obtained by the use of Spreading technique in femtocell networks has encouraged us to use it for Device-to-Device (D2D) communication and Internet of Things (IoT). In this talk, I will also shed some light on the fact that spreading the bitrate requirements of D2D pairs and IoT devices over multiple subchannels helps reducing the overall interference in the network while improving the throughput and energy efficiency.
Dr. Rahul Thakur received his M.S. and Ph.D. degrees in Computer Science and Engineering from the Indian Institute of Technology Madras, in June 2017. He did his Bachelor of Engineering (B.E.) in Computer Science from Barkatullah University Institute of Technology, Bhopal, in2010. Since July 2017, he has been with Birla Institute of Technology andScience Pilani - K.K. Birla Goa Campus, where he is currently an AssistantProfessor in the Department of Computer Science and Information Systems. Hismain research interests include Green Cellular Networks, Small Cell Communication, and Internet of Things (IoT) with the focus on energy efficiency and self-organizing networks.