Efficient power control via pricing in wireless data networks

Abstract

A major challenge in the operation of wireless communications systems is the efficient use of radio resources. One important component of radio resource management is power control, which has been studied extensively in the context of voice communications. With the increasing demand for wireless data services, it is necessary to establish power control algorithms for information sources other than voice. We present a power control solution for wireless data in the analytical setting of a game theoretic framework. In this context, the quality of service (QoS) a wireless terminal receives is referred to as the utility and distributed power control is a noncooperative power control game where users maximize their utility. The outcome of the game results in a Nash equilibrium that is inefficient. We introduce pricing of transmit powers in order to obtain Pareto improvement of the noncooperative power control game, i.e., to obtain improvements in user utilities relative to the case with no pricing. Specifically, we consider a pricing function that is a linear function of the transmit power. The simplicity of the pricing function allows a distributed implementation where the price can be broadcast by the base station to all the terminals. We see that pricing is especially helpful in a heavily loaded system.

Evolutionary Power Control Games in Wireless Networks

“…The power control game in wireless networks is a typical non-cooperative game where each mobile decides about his transmit power in order to optimize its performance. This application of non-cooperative game theory and tools is studied in several articles [6,9,7]. The main difference in this article is the use of the evolutionary game theory which deals with population dynamics that is well adapted for studying the power control game in dense wireless networks.…”

Performance Analysis of MIMO MC-DS/CDMA System Using Chaotic Spreading Sequence

“…Pricing the system resources appears to be a powerful tool for achieving a more socially desirable result. A non-cooperative power control game with pricing (NPGP) in MC-DS/CDMA has been investigated in [7,8] and the existence of nash equilibrium and corresponding sub-carrier allocation has also been addressed.…”

“…Each player in the game maximizes some function of utility in a distributed fashion. [7,8]. The game settles at Nash equilibrium if one exits.…”

Adaptive Modulation and Coding for Utility Enhancement in VMIMO WSN Using Game Theory

“…An approach to adjust the transmission power of a node in WSN is based on game theory which has its roots in economics [6] and there has been a growing interest in applying game theory to study wireless systems [7][8][9]. Game theory involves a set of competing players looking to maximize their own utility, based upon certain actions they can take.…”