The Power of Non-Uniform Wireless Power
The authors study a fundamental measure for wireless interference in the SINR model known as (weighted) inductive independence. This measure characterizes the effectiveness of using oblivious power - when the power used by a transmitter only depends on the distance to the receiver - as a mechanism for improving wireless capacity. They prove optimal bounds for inductive independence, implying a number of algorithmic applications. An algorithm is provided that achieves - due to existing lower bounds - capacity that is asymptotically best possible using oblivious power assignments. Improved approximation algorithms are provided for a number of problems for oblivious power and for power control, including distributed scheduling, connectivity, secondary spectrum auctions, and dynamic packet scheduling.