Non cooperative power control game for wireless ad hoc networks

Abstract

Transmission power control is an important issue in wireless ad hoc networks due to its dependency on battery power. It is a tendency of ad hoc nodes to transmit at their maximum power level to ensure successful delivery of their packets which causes interference to other neighboring nodes. In response, the other nodes also increase their power level which creates a situation of cascading effect where all nodes drain their battery power. In this paper, the cascading effect of interference caused by neighboring nodes and its impact on battery power in wireless ad hoc networks is analyzed and a non cooperative power control game is proposed to obtain an optimum power at which the nodes can maximize their utility without compromising the quality of services. The concept of game theory is also applied to determine an optimum SNIR that is the same value for all the nodes in networks for their mutual benefit. Through the numerical examples it is shown that the proposed concept obtains the maximum utility by minimizing the transmission power.

Un algoritmo de control de potencia para WLAN basadoen Teoría de Juegos

“…GT permite la óptima asignación de recursos y para ello se busca optimizar una función de utilidad, la cual se define con base en parámetros conocidos de la red inalámbrica tales como la Relación de Entrega de Paquetes (PDR, Packet Delivery Rate) [11], la Relación Señal a Interferencia más Ruido (SINR, Signal to Interference plus Noise Ratio) [13], [14] y el throughput [15]. En cada caso, los resultados son favorables y brindan ventajas en comparación a los casos sin control de potencia.…”

SINR Pricing in Non Cooperative Power Control Game for Wireless Ad Hoc Networks

“…Calculate SINR using equation (2) Calculate utility function using equation (8) and equation (17) Step 5. Optimize: Nash Equilibrium…”

“…All nodes, thereby, drain their battery power soon. There may be a solution to reduce the power level, but on the cost of compromising QoS [2]. Therefore, there is a need of minimizing interference by optimizing transmission power to increase channel capacity as well as to extend battery life.…”