Abstract
This paper deals with the problem of resources allo-cation in the downlink of the radio mobile systems. The allocation of resources is established in the context of multi-path effect and Doppler effect. These phenomena cause randomly variations of the channel and make difficult the allocation of the resources. Therefore, the problem of resources allocation is a high non linear optimization problem. Thus, we propose an implementation of genetic algorithms approach to increase the total throughput of users while minimizing the consumption of the total power of the base station. Like the evolutionary algorithms approach, this method is characterized by its robustness, permitting to efficiently solve a non linear optimization problem.
Highlights
Today, the requirements of the users’s data rate are becoming more and more increasing; which led to the adoption of efficient resources allocation methods in order to improve the QoS in mobile radio communications
The major change of these systems is the access method OFDMA (Orthogonal Frequency Division Multiplexing Access) which significantly increases the capacity by the improvement of the signal-to-noise ratio obtained with an adaptive resources allocation [13]
We propose an implementation of genetic algorithms for solving the rate-adaptive and the margin-adaptive problems, subject to the available total power in the base station and the minimal required users’s data rate
Summary
The requirements of the users’s data rate are becoming more and more increasing; which led to the adoption of efficient resources allocation methods in order to improve the QoS in mobile radio communications. These resources management methods form the basis of the fourth generation of mobile networks systems. The major change of these systems is the access method OFDMA (Orthogonal Frequency Division Multiplexing Access) which significantly increases the capacity by the improvement of the signal-to-noise ratio obtained with an adaptive resources allocation [13]. The method OFDM is very suitable for the variations of the channel caused in particular by the multi-path phenomenon and the Doppler effect
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