Rejoy George
SFO Technologies Pvt. Ltd, India
Title: Energy Efficient Heterogeneous Networks-A Case Study
Biography
Biography: Rejoy George
Abstract
As we step into the next generation of wireless communication technology, a multitude of requirements are laid out to be covered. The current architecture of cellular technology with macro base stations deployed in regular and planned manner will not suffice as the need would be to serve over a million connections per square kilometer. The legacy homogeneous architectures are being replaced with heterogeneous networks. The unplanned deployment of micro base stations is of major concern since it will increase the power requirements and will lead to severe interference levels that can degrade network performance to unacceptable levels. In our research work, we investigate the patterns in different traffic scenarios (office, business, residential) and explore various factors that contribute to energy consumption in network during lean and peak hours. We propose a centralized switching algorithm for micro base stations that enable multiple modes of operation that can automatically switch between inactive and active modes based on the cell load, neighbor’s cell load, automatic neighbor relations and channel occupancy across neighbors. The results of the algorithm (14% energy savings in inactive mode operation) show significant improvement in achieving better system level efficiency in Heterogeneous cellular deployments. In addition to this, our work also investigates the range of exclusion zone to be maintained in order to effectively restrict the interference levels within appropriate limits so as to maximize system throughput. Consideration of the exclusion zone also limits the number of micro base stations thereby contributing to energy efficiency in the cellular network.