Abstract—Orthogonal Frequency Division Multiple Access (OFDMA) is the basis for several emerging wireless systems, such as 802.16e (WiMAX) and Long Term Evolution (LTE). In special, the diverse requirements of multimedia traffic to be supported by convergent broadband wireless networks are commonly difficult to be satisfied, considering factors such as scarcity of radio resources, variability of wireless channel conditions as well as the exponentially growing number of subscribers. Moreover, a scheduler works aiming to intelligently allocate radio resources to achieve high system performance in terms of efficiency and fairness. In this paper, we consider an OFDMA-based WiMAX network using the point-to-multipoint mode (PMP), where multiple subscribers are served by a centralized service provider (a base station), and PUSC (Partial Usage of Subchannels) channelization, considered mandatory for uplink in the 802.16 standard. Given such network conditions, we propose a scheduling technique, based on an evolution of the technique proposed in [4], that is evaluated through discrete event simulation, considering different traffic conditions and scenarios. Results indicate that the strategy was successfully adapted to the new physical layer specifications, respecting all the quality requirements of each kind of scheduling service.

Index Terms—WiMAX, scheduling, quality of service

Cite: Carino Andrade Rodrigues and Paulo Roberto de Lira Gondim, "Traffic Scheduling in OFDMA-based WiMAX Networks on the PMP Mode," Journal of Industrial and Intelligent Information, Vol. 2, No. 3, pp. 233-239, September 2014. doi: 10.12720/jiii.2.3.233-239