Energy-Delay Tradeoff Analysis and Enhancement in LTE Power-Saving Mechanisms

We propose a modified power-saving mechanism (PSM) that reversely applies the state transition of legacy LTE PSM by considering the attributes of network propagation delay. We analyze the PSM with respect to the energy consumption and the buffering delay, and characterize them as a simple energy-delay tradeoff (EDT) curve according to the operational parameters. The resulting EDT curves clearly show that the proposed PSM enhances the legacy PSM in various network environments and also guide to select an optimal parameter for maximizing the energy conservation while ensuring the quality of service.