Energy, QoS and bursts profile management in uplink IEEE 802.16e mobile WiMAX networks

The battery duration is one of the most important concerns in mobile WiMAX systems. The consumed energy of mobile nodes depends mainly on the selected modulation level, and on the operator policy. On the one hand, when a high AMC level (such as 64QAM) is opted by the Base Station (BS), fewer time slots (burst profiles) are consumed while the corresponding mobile transmits its data, however this leads to a higher amount of consumed energy. In this work, we study IEEE 802.16e mobile WiMAX network at the active mode in order to maximize the transmission rate at the uplink sub-frame space taking into account acceptable energy consumption and efficient burst profiles. We propose a mechanism to achieve this aim based on which the base station chooses an adequate modulation level. In addition, resource assignment in the mobile node is performed based on a tradeoff between the burst profile, minimal energy and an acceptable QoS. The numerical study of the proposed mechanism shows its acceptable performance.