Institute of Electrical & Electronic Engineers
As traffic demands and the number of subscribers continue to grow, conventional wireless cellular networks will not be able to support an increased number of users and meet their Quality-of-Service (QoS) requirements. Recently, the notion of deploying Low Power Nodes (LPNs) in the existing macro-cellular system has been attracting a plethora of attention from both academia and industry. In this paper, the authors propose a step-wise optimal Low Power Node (LPN) deployment algorithm for LTE heterogeneous networks. Their proposed LPN deployment algorithm takes signal quality, relative loading among macro cells and LPN cells, and user density into account. Simulation results show that the proposed algorithm can achieve close to 100% coverage gain and more than 50% average cell throughput gain over a random LPN deployment scheme.