A survey of energy-efficient wireless communications

TLDR

Reducing energy consumption in wireless communications has attracted increasing attention recently, and various techniques have been proposed to address this issue. The article reviews state‑of‑the‑art energy‑efficient wireless technologies and outlines challenges that remain. The review surveys advanced physical‑layer techniques (MIMO, OFDM, cognitive radio, network coding, cooperative communication), new network architectures (heterogeneous networks, distributed antennas, multi‑hop cellulars), and resource‑management schemes (cross‑layer optimization, dynamic power saving, multi‑radio coordination).

Abstract

Reducing energy consumption in wireless communications has attracted increasing attention recently. Advanced physical layer techniques such as multiple-input multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM), cognitive radio, network coding, cooperative communication, etc.; new network architectures such as heterogeneous networks, distributed antennas, multi-hop cellulars, etc.; as well as radio and network resource management schemes such as various cross-layer optimization algorithms, dynamic power saving, multiple radio access technologies coordination, etc. have been proposed to address this issue. In this article, we overview these technologies and present the state-of-the-art on each aspect. Some challenges that need to be solved in the area are also described.