EURASIP Journal on Wireless Communications and Networking
Introduction to Space-Time Wireless Communications
Introduction to Space-Time Wireless Communications
Asymptotic eigenvalue distributions and capacity for MIMO channels under correlated fading
IEEE Transactions on Wireless Communications
Energy-constrained modulation optimization
IEEE Transactions on Wireless Communications
MEERA: cross-layer methodology for energy efficient resource allocation in wireless networks
IEEE Transactions on Wireless Communications
Cross-Layer Energy and Delay Optimization in Small-Scale Sensor Networks
IEEE Transactions on Wireless Communications
Delay-bounded packet scheduling of bursty traffic over wireless channels
IEEE Transactions on Information Theory
Adaptive modulation and MIMO coding for broadband wireless data networks
IEEE Communications Magazine
Traffic-Oblivious Routing for Guaranteed Bandwidth Performance
IEEE Communications Magazine
From theory to practice: an overview of MIMO space-time coded wireless systems
IEEE Journal on Selected Areas in Communications
Energy-efficiency of MIMO and cooperative MIMO techniques in sensor networks
IEEE Journal on Selected Areas in Communications
Cross-layer channel-aware approaches for modern wireless networks
MACOM'10 Proceedings of the Third international conference on Multiple access communications
Energy Consumption in Downlink MIMO Relay Systems with Multiple Users
GREENCOM-CPSCOM '10 Proceedings of the 2010 IEEE/ACM Int'l Conference on Green Computing and Communications & Int'l Conference on Cyber, Physical and Social Computing
Area Power Consumption in a Single Cell Assisted by Relays
GREENCOM-CPSCOM '10 Proceedings of the 2010 IEEE/ACM Int'l Conference on Green Computing and Communications & Int'l Conference on Cyber, Physical and Social Computing
Beamforming on mobile devices: a first study
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
Energy efficient communications for future broadband cellular networks
Computer Communications
Energy-based rate adaptation for 802.11n
Proceedings of the 18th annual international conference on Mobile computing and networking
Power management of MIMO network interfaces on mobile systems
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
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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.