A novel energy efficient packet-scheduling algorithm for CoMP

The increasing energy consumption driven by striking growths in the number of users and data usage has placed cost reduction and energy efficiency at the forefront of system design. As a step towards incorporating more energy friendly mobile platforms in future networks, 3GPP LTE-Advanced has adopted Coordinated Multi-Point (CoMP) transmission/reception due to its ability to mitigate and/or coordinate inter-cell interference (ICI). However, there is room for reducing energy consumption further by exploiting the inherent flexibility of the dynamic resource allocation (DRA) protocols. Pivotal to the DRA is the packet scheduler that plays central key role in determining the overall performance of the 3GPP longterm evolution (LTE) based on packet-switching operation and provide a potential research playground for optimizing energy consumption in future networks. In this paper, a novel energy-efficient scheduling (EES) is proposed that can achieve power-efficient transmission to the UEs while providing both system energy efficiency gain and fairness improvement. The proposed algorithm is based on a novel scheduling metric focusing on the ratio of the transmit energy per bit and allocates the Physical Resource Block (PRB) to the UE that requires the least ratio of the transmit energy per bit. Through computer simulation, the performance of the proposed EES packet-scheduling algorithm using mixed traffic is compared with the State-of-the-Art (SoTA) packet-scheduling algorithms such as Maximum Carrier-to-Interface ratio (MCI), Proportional Fairness (PF), and Round Robin (RR), which eventually shows the significant improvement. 2014 Elsevier B.V. All rights reserved.