1. A method of controlling, in a multi-access communication network, the provision of services to users by means of radio resources of said multi-access communication network, comprising the steps of: modelling a system made up of said radio resources of said multi-access communication network as a Markov chain, wherein said Markov chain comprises states and transitions between states, and wherein each state of said Markov chain is identified by a respective set of values, each set of values being representative of a number of users served by each of said radio resources, and each transition between said states of said Markov chain being represented by allocation and de-allocation to said users of the services provided by said radio resources; defining a cost function to which each of said states gives a contribution, each of said contributions being weighted by the probability that said system is in said each state, where said probability is a function of the possible transitions between said states; identifying a plurality of transitions between said states that optimizes said cost function; and allocating said radio resources to said users according to said plurality of transitions.