A Hybrid Resource Management Technique for Energy and QoS Optimization in Fractional Frequency Reuse Based Cellular Networks

This paper presents a new technique for jointly optimizing energy consumption and quality of service (QoS) in heterogeneous cellular networks employing fractional frequency reuse (FFR) in the macrocell tier. The proposed technique combines radio resource management (RRM) and network routing principles to produce an effective way of utilizing the spectrum. Based on a novel method of interference mapping, the RRM is invoked, in distributed or centralized manner, to allocate the resource. In the case of centralized RRM, network routing is applied to maximize spectrum utilization. It will be shown through matching mathematical analysis and computer simulations that, relative to existing well known techniques, the proposed technique offers significant QoS improvements, in terms of guaranteed data rate per user, as well as, enhancements in the overall energy efficiency of the network.