Analysis of resource allocation in wireless mobile systems with orthogonal frequency division multiplexing.
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Abstract
Nowadays, there are wireless systems that offer different class of services with large bandwidth requirements. Nevertheless, to share their resources, such systems have to develop models in order to allocate those resources among costumers. Moreover, this kind of systems has to counteract the effects of lossy channel, so Orthogonal Frequency Division Multiplexing (OFDM) is implemented by them. Researches have been done related to allocate the resources, being the Quality of Service (QoS) the main goal. This thesis is focused on the carrier, in other words, a mathematical model is derived taking into account the mobility of users and the system capacity instead of the QoS. Thus, the model has long been modified to show the influence of the channel conditions. Both models are developed as an s-dimensional birth- death process. The mobility of a user in the system is modeled by different probabilities in the case of the session termination and of the handoffs. To show the performance of the system, the blocking probability and the net revenue are presented. Finally numerical results are showed for different levels of mobility of the model derived.