A queue-based dynamic power control approach for wireless communication networks

A wireless communication network is considered where the data queues of each link are explicitly taken into account. Based on the queue dynamics the optimal transmission powers for minimizing a predefined cost functional are calculated using the theory of optimal control. Thereby certain constraints concerning the transmission powers are explicitly taken into account. The minimization of the cost functional may be related, e.g., to the system-wide maximization of Quality of Service (QoS) in the communication network. It turns out that the necessary conditions for the optimal control strategy are well interpretable and the minimization of the Hamiltonian can be reformulated as a convex optimization problem. The applicability of the method is shown by means of simulation studies.