A cross-layer approach to energy efficiency for adaptive MIMO systems exploiting spare capacity

Hongseok Kim, Chan-Byoung Chae, Gustavo De Veciana, Robert W. Heath

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

In this paper, we propose a mechanism to switch between multiple-input multiple-output (MIMO) with two transmit antennas and single-input multiple-output (SIMO) to conserve mobile terminals' energy. We focus on saving uplink RF transmission energy of mobile terminals in cellular systems supporting best effort traffic. The key idea is to judiciously slow down transmission rates when a base station is underutilized. We show that there exists a crossover point on the transmission rate below which SIMO consumes less power than MIMO when circuit power is included. The crossover point is an increasing function of the circuit power, the number of receive antennas and channel correlation, all of which increase the potential energy savings resulting from mode switching. We propose an adaptive mode switching algorithm combined with rate selection to maintain a user's target throughput while achieving energy efficiency. Extensive flow-level simulations under dynamic loads confirm that the proposed technique can reduce the transmission energy by more than 50% and enables an effective tradeoff between file transfer delay and energy conservation.

Original languageEnglish
Article number5200986
Pages (from-to)4264-4275
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume8
Issue number8
DOIs
Publication statusPublished - 2009 Aug 1

Fingerprint

Cross-layer
Multiple-input multiple-output (MIMO) Systems
Adaptive Systems
Energy Efficiency
Energy efficiency
Multiple-input multiple-output (MIMO)
Crossover
Antenna
Energy conservation
Energy
Antennas
Dynamic Load
Cellular Systems
Networks (circuits)
Output
Conserve
Energy Conservation
Increasing Functions
Uplink
Energy Saving

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

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A cross-layer approach to energy efficiency for adaptive MIMO systems exploiting spare capacity. / Kim, Hongseok; Chae, Chan-Byoung; De Veciana, Gustavo; Heath, Robert W.

In: IEEE Transactions on Wireless Communications, Vol. 8, No. 8, 5200986, 01.08.2009, p. 4264-4275.

Research output: Contribution to journalArticle

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