A method for configuring a plurality of transport channels of a Code Division Multiple Access type telecommunication system, wherein said Code Division Multiple Access type telecommunication system comprises at least one first entity and at least one second entity, a phase of communication from said first entity having a plurality of processing procedures specific to said plurality of transport channels, each of said processing procedures having a rate matching step, said rate matching step executing a transformation of an input block of an initial size (Xi) into an output block of a final size (Yi), characterized in that said method comprises the steps of: transmitting, by said second entity, a plurality of rate matching parameters (Eq), each of said rate matching parameters being relative to a rate matching ratio (Yi/Xi) for a corresponding transport channel; receiving, by said first entity, said plurality of rate matching parameters (Eq); calculating, by said first entity, for each of said transport channels, an intermediate size (Y'i) of said output block based on said rate matching parameter (Eq;Sq), the rate matching parameter being relative to the rate matching ratio (Yi/Xi), and said initial size of said input block; determining, by said first entity, a smallest size of an available maximum payload (NJSEL), for at least one radio frame, from among a plurality of possible maximum payloads (N1, ▪▪▪, Nr) on a basis of a size of said possible maximum payload and a total sum ∑ j = 1 j = k Y j ʹ of said intermediate sizes Y'j of said output blocks, k being a number of blocks, each of said possible maximum payloads being relative to at least one radio frame; calculating, by said first entity, said final sizes (Yi) of said output blocks, said final size (Yi) of said output block for a transport channel i being calculated on a basis of said smallest size of said available maximum payload (NJSEL) of a multiplexing frame and a ratio of a partial sum ∑ j = 1 j = i Y j ʹ of said intermediate sizes Y'j of said output blocks to said total sum ∑ j = 1 j = k Y j ʹ of said intermediate sizes Y'j of said output blocks, so that said total sum of said final sizes is equal to said smallest size of said available maximum payload (NJSEL), i being an integer (1, · · ·, k); executing, by said first entity, a corresponding rate matching step, for each of said transport channels, by puncturing or repeating at least one bit of said input block on a basis of said final size of said output block; and multiplexing, by said first entity, said output blocks on said multiplexing frame. transmitting, by said second entity, a plurality of rate matching parameters (Eq), each of said rate matching parameters being relative to a rate matching ratio (Yi/Xi) for a corresponding transport channel; receiving, by said first entity, said plurality of rate matching parameters (Eq); calculating, by said first entity, for each of said transport channels, an intermediate size (Y'i) of said output block based on said rate matching parameter (Eq;Sq), the rate matching parameter being relative to the rate matching ratio (Yi/Xi), and said initial size of said input block; determining, by said first entity, a smallest size of an available maximum payload (NJSEL), for at least one radio frame, from among a plurality of possible maximum payloads (N1, ▪▪▪, Nr) on a basis of a size of said possible maximum payload and a total sum ∑ j = 1 j = k Y j ʹ of said intermediate sizes Y'j of said output blocks, k being a number of blocks, each of said possible maximum payloads being relative to at least one radio frame; calculating, by said first entity, said final sizes (Yi) of said output blocks, said final size (Yi) of said output block for a transport channel i being calculated on a basis of said smallest size of said available maximum payload (NJSEL) of a multiplexing frame and a ratio of a partial sum ∑ j = 1 j = i Y j ʹ of said intermediate sizes Y'j of said output blocks to said total sum ∑ j = 1 j = k Y j ʹ of said intermediate sizes Y'j of said output blocks, so that said total sum of said final sizes is equal to said smallest size of said available maximum payload (NJSEL), i being an integer (1, · · ·, k); executing, by said first entity, a corresponding rate matching step, for each of said transport channels, by puncturing or repeating at least one bit of said input block on a basis of said final size of said output block; and multiplexing, by said first entity, said output blocks on said multiplexing frame.