Combined rate and power allocation with link scheduling in wireless data packet relay networks with fading channels

Authors:
Minyi Huang;Subhrakanti Dey
Affiliations:
Dept. of Info. Eng., Res. Sch. of Info. Sci. and Eng., The Australian National University, Canberra, Australia and Dept. of Elec. and Electr. Eng., Univ. of Melbourne, Parkville, Victoria, Austral ...;Department of Electrical and Electronic Engineering, University of Melbourne, Parkville, Victoria, Australia
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2007

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Abstract

We consider a joint rate and power control problem in a wireless data traffic relay network with fading channels. The optimization problem is formulated in terms of power and rate selection, and link transmission scheduling. The objective is to seek high aggregate utility of the relay node when taking into account buffer load management and power constraints. The optimal solution for a single transmitting source is computed by a two-layer dynamic programming algorithm which leads to optimal power, rate, and transmission time allocation at the wireless links. We further consider an optimal power allocation problem for multiple transmitting sources in the same framework. Performances of the resource allocation algorithms including the effect of buffer load control are illustrated via extensive simulation studies.