Delay-optimal power and precoder adaptation for multi-stream MIMO systems
IEEE Transactions on Wireless Communications
Energy-efficient resource allocation in wireless networks with quality-of-service constraints
IEEE Transactions on Communications
Maximum sum-rate of MIMO multiuser scheduling with linear receivers
IEEE Transactions on Communications
Delay-optimal power and subcarrier allocation for OFDMA systems via stochastic approximation
IEEE Transactions on Wireless Communications
Queuing with adaptive modulation and coding over wireless links: cross-Layer analysis and design
IEEE Transactions on Wireless Communications
Two dimensional cross-layer optimization for packet transmission over fading channel
IEEE Transactions on Wireless Communications
Capacity bounds and estimates for the finite scatterers MIMO wireless channel
IEEE Journal on Selected Areas in Communications
A Cross-Layer Adaptation Scheme for Improving IEEE 802.11e QoS by Learning
IEEE Transactions on Neural Networks
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In this paper we focus on minimizing the long-term average power consumption of a single transmitter providing Quality of Service (QoS) enabled traffic to a single receiver. Both the transmitting and receiving stations are equipped with multiple antennas. First, we present a general {K × M} system model where K is the number of independently buffered QoS streams and M is the number of parallel channels available through MIMO SVD eigenmode transmission. Through application of the constrained Markov decision process (MDP) framework combined with a novel MAC layer rate assignment scheme, a randomized per-buffer scheduling policy is obtained. The designed policy exploits queue state information to schedule traffic while meeting throughput, delay and loss constraints. Packets scheduled for transmission during each frame are mapped across the set eigenmode channels subject to available channel resources and the set of channel eigenvalues. Simulation results are provided for several scenarios. System drawbacks, limitations and extensions are also discussed.