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oai:recercat.cat:20.500.14342/33262025-03-11T04:08:31Zcom_2072_482405com_2072_183628col_2072_482415

00925njm 22002777a 4500 dc Gutiérrez González, Ismael author Bader, Faouzi author Aquilué de Pedro, Ricard author Pijoan Vidal, Joan Lluís author 2009-02 The orthogonal frequency divisionmultiple access (OFDMA) scheme has been selected as a potential candidate formany emerging broadband wireless access standards. In this paper, a new joint scheduling and resource allocation scheme is proposed for the OFDMA systems using contiguous subcarrier permutation. The proposed resource allocation algorithm provides contiguous sets of frequency-time resource units following a rectangular shape yielding a reduction on the required burst signalling. The joint scheduling and resource allocation process is divided into two phases: the QoS requirements fulfilment and the input buffers emptying status. For each phase, a specific prioritization function is defined in order to obtain a trade-off between the fairness and the spectral efficiency maximization. The new prioritization scheme provides a reduction of 50% of the 99th percentile from the delivered packets delay in case of non real-time services, and 30% of the packet loss rate in case of real-time services compared to the proportional fair scheduling function. On the other hand, it is also demonstrated that using the rectangular data packing algorithm, the number of required bursts per frame can be reduced up to a few tenths without compromising the performance. http://hdl.handle.net/20.500.14342/3326 http://doi.org/10.1155/2009/134579 Telecomunicació de banda ampla, Sistemes de Multiplexatge per divisió de freqüència Contiguous Frequency-Time Resource Allocation and Scheduling for Wireless OFDMA Systems with QoS Support