Providing QoS guarantees in wireless networks is a much more complex problem than in fixed networks. Conventional fixed allocation schemes are not suitable for these traffic patterns and it becomes necessary to design new dynamic resourceallocation schemes. This paper deals with three of the main wireless networks problems to provide multimedia QoS guarantees, i.e., frequency assignation, bandwidth requirements and error rate. For the former problem, several frequency assignationalgorithms have been evaluated. For the second, a dynamic resource allocation algorithm is proposed. The goal of this algorithm is to share the available wireless bandwidth between the major number of connections, and offer the maximum QoS to all of themdepending on the connections state. For the later, error rate effects are corrected by means of an adaptive error control algorithm based on RTP. This algorithm tries to balance the channels quality of the on-going calls to obtain a fair error quality for all of them.
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