Dynamic Channel Allocation Schemes in Mobile Radio Systems with Frequency Hopping

In this paper a F-TDMA based mobile radio system using both dynamic channel allocation (DCA) and frequency hopping (FH) is investigated. We propose and evaluate the performance of a new interference adaptive DCA (IA-DCA) algorithm that is suitably designed for a network implementing FH. The results we show in the paper have been achieved by means of a simulation tool which takes propagation, mobility, interference, traffic and channel allocation into account. Moreover, the advantages of using FH are accounted for by using suitable analytical models that give the frame error rate as a function of the carrier-to-interference ratio and the number of hopping frequencies. We compare the performance of our proposal to that of fixed channel allocation (FCA) with and without FH, and the well known IA-DCA schemes investigated in the literature in the absence of FH. The performance results show that interesting synergic effects can be obtained in terms of forced termination and user satisfaction probability by using both DCA and FH in a F-TDMA based mobile radio network