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The performance of WiMax in a multi-traffic scenario is studied, including system throughput, access delay and packet dropping rate. The effects of frame structure, minimum contention window size and delay constraint on the performance are investigated for different prioritized applications. Simulation results show that, increased system throughput, reduced access delay and lower packet dropping rate...
In this paper, the contention based access mode with a finite retry limit in the IEEE 802.16 media access control (MAC) protocol is modeled and analyzed. In addition, we provides an insight on the effects of various parameters involved in the bandwidth request mechanism on the system performance. The accuracy of the analytical model is verified by simulations.
IEEE 802.16 technology is a promising technology to solve the last mile problem by its wireless, long distance, and high-bandwidth transmission. However, there isn't any suitable simulator to evaluate the performance between different IEEE 802.16 bandwidth allocation algorithms. In this paper, an IEEE 802.16 network simulator, Light WiMAX simulator (LWX), is proposed to provide flexible and robust...
IEEE 802.16e devices may enter sleep mode to conserve energy. There has been some work studying how to schedule device's packet transmissions to maximize the device's sleep period while meeting associated QoS (quality of service) requirements. This paper proposes two schemes that attempt to save more energy by further reducing the frequency of transitions from sleep to active mode (state) in a sleep...
The mobile WiMAX systems based on IEEE 802.16e-2005 provide high data rate for the mobile wireless network. However, the link quality is frequently unstable owing to the long-distance and air interference and therefore impacts real-time applications. Thus, a bandwidth allocation algorithm is required to be modulation-aware, while further satisfying the latency guarantee, service differentiation and...
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