This paper is focused on the study of the allocation of radio resources using the scheduling and opportunistic techniques. This allows us to compare the quality of service afforded to each user when the types of traffic transmitted are highly heterogeneous and efficiently evaluate the performance of resource allocation algorithms and schedulers. Many scheduling algorithms are used for resource allocation and scheduling: Round Robin, MaxSNR and PF. The main objective of this research work is to analyze and develop the main performances relating to schedulers deployed by telecommunication operators. It should be noted that scheduling is a primodridial phase preceding the phase of allocation and allocation of radio resources in a mobile radio telecommunications system. We will focus in this paper on the major advantages and the contribution of opportunistic