1. A method for configuring a telecommunication system comprising a plurality of entities implementing a phase of communicating data conveyed by a plurality of transport channels, said entities comprising at least one sending entity and at least one receiving entity, said phase of communicating of said sending entity comprising a plurality of processing procedures, said plurality of processing procedures being specific to said plurality of said transport channels, each of said processing procedures comprising a rate matching step, characterized in that said method comprises: a step of calculating, by said first entity, for each of said processing procedures, said final size of said output block obtained after said rate matching step as a function of said initial size of said input block on a basis of a criterion, said criterion being dependent on a parameter representative of a rate matching ratio for each of said processing procedures; said rate matching step of executing a transformation of an input block of an initial size into an output block of a final size; and a transmitting step, by said first entity, of transmitting the data transformed in the rate matching step via said physical channel to another of said entities, referred to as a second entity.