Optimizing Adaptive Modulation in Wireless Networks via Utility Maximization

D. O'Neill, A. Goldsmith, and S. Boyd

Proceedings IEEE International Conference on Communications, pages 3372–3377, May 2008.

Best Paper Award, ICC2008

We investigate adaptive modulation using the network utility maximization framework. We derive new crosslayer optimal power and rate adaptation policies for several practical modulation schemes. The behavior of these crosslayer policies is found to differ from policies based on physical-layer optimization only. The multiple flow single link case is analyzed and optimal power and rate policies found. The multiple interfering link case is investigated and a numerical method presented to find optimal policies for this case.