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4G cellular systems and the IMT Advanced candidates will provide broadband wireless access with QoS. Especially in multihop configurations of these systems the base station controls resources centrally while relays can take over a part of the responsibility on the second hop. To make this work on layer two, scheduling is the most important task. However, many dimensions of the problem lead to much...
Scheduling algorithms are very important in WiMAX for the efficient use of radio resources. However, the standard does not specify which scheduling algorithm(s) should be used. A scheduling algorithm should take into account the WiMAX QoS classes and service requirements. The scheduling algorithm also has to taken into account other models of the WiMAX system such as power saving and pricing models...
In this paper a new permutation zone which combines adjacent and distributed subcarrier permutation is proposed for Orthogonal Frequency Division Multiple Access (OFDMA) systems. For such purpose two types of burst are defined: localized and distributed. A new resource allocation and scheduling algorithm that exploits such structure is then proposed. Furthermore, the effects of limited feedback are...
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