A method for allocating resources to a terminal in a telecommunication system comprising at least a carrier comprising several subcarriers, said carrier supporting at least one subcarrier spacing configuration Δf 0 and one subcarrier spacing configuration Δf 1, with Δf 1 = q.Δf 0, q being a positive integer, said method comprising: a) selecting the subcarrier spacing configuration Δf 1; b) determining a number L of resource blocks having subcarriers of said subcarrier spacing configuration Δf 1; c) allocating to said terminal subcarriers among the subcarriers of the carrier of subcarrier spacing configurations Δf 1, having their frequencies: - greater or equal to a frequency, namely f start, being the lowest frequency among frequencies of subcarriers of subcarrier spacing configuration Δf 1 having a frequency higher than or equal to f ref + m.N.Δf 1 + k.N.Δf 0, ∘ f ref being the lowest frequency among the subcarriers that are allowable for subcarrier spacing Δf 1 in the carrier, ∘ k being an integer greater or equal to 1 and lesser or equal to (q-1), ∘ N being the number of subcarriers in a resource block, ∘ m being an integer greater or equal to 0 and lesser than a maximum number of resource blocks, allowable in the carrier, having subcarriers of subcarrier spacing configuration Δf 1; - lesser or equal to a frequency f ref + m.N.Δf 1 + (L.N - 1).Δf 1, namely f last; wherein m is determined such as at least one subcarrier of subcarrier spacing configurations Δf 1, having a frequency of at least f ref + m.N.Δf 1 and at the most f ref + (m+1).N.Δf 1 - Δf 1, can be allocated to the terminal; and wherein k is determined such as f start - f near is greater than G, G being a strictly positive threshold, and f near being a frequency of a subcarrier with a subcarrier spacing configuration different from Δf 1, said subcarrier having the highest frequency among frequencies of subcarriers allocated in the carrier having subcarrier spacing configurations different from Δf 1 and having lower frequencies than f ref + (m+1).N.Δf 1. a) selecting the subcarrier spacing configuration Δf 1; b) determining a number L of resource blocks having subcarriers of said subcarrier spacing configuration Δf 1; c) allocating to said terminal subcarriers among the subcarriers of the carrier of subcarrier spacing configurations Δf 1, having their frequencies: - greater or equal to a frequency, namely f start, being the lowest frequency among frequencies of subcarriers of subcarrier spacing configuration Δf 1 having a frequency higher than or equal to f ref + m.N.Δf 1 + k.N.Δf 0, ∘ f ref being the lowest frequency among the subcarriers that are allowable for subcarrier spacing Δf 1 in the carrier, ∘ k being an integer greater or equal to 1 and lesser or equal to (q-1), ∘ N being the number of subcarriers in a resource block, ∘ m being an integer greater or equal to 0 and lesser than a maximum number of resource blocks, allowable in the carrier, having subcarriers of subcarrier spacing configuration Δf 1; - lesser or equal to a frequency f ref + m.N.Δf 1 + (L.N - 1).Δf 1, namely f last; wherein m is determined such as at least one subcarrier of subcarrier spacing configurations Δf 1, having a frequency of at least f ref + m.N.Δf 1 and at the most f ref + (m+1).N.Δf 1 - Δf 1, can be allocated to the terminal; and wherein k is determined such as f start - f near is greater than G, G being a strictly positive threshold, and f near being a frequency of a subcarrier with a subcarrier spacing configuration different from Δf 1, said subcarrier having the highest frequency among frequencies of subcarriers allocated in the carrier having subcarrier spacing configurations different from Δf 1 and having lower frequencies than f ref + (m+1).N.Δf 1. - greater or equal to a frequency, namely f start, being the lowest frequency among frequencies of subcarriers of subcarrier spacing configuration Δf 1 having a frequency higher than or equal to f ref + m.N.Δf 1 + k.N.Δf 0, ∘ f ref being the lowest frequency among the subcarriers that are allowable for subcarrier spacing Δf 1 in the carrier, ∘ k being an integer greater or equal to 1 and lesser or equal to (q-1), ∘ N being the number of subcarriers in a resource block, ∘ m being an integer greater or equal to 0 and lesser than a maximum number of resource blocks, allowable in the carrier, having subcarriers of subcarrier spacing configuration Δf 1; ∘ f ref being the lowest frequency among the subcarriers that are allowable for subcarrier spacing Δf 1 in the carrier, ∘ k being an integer greater or equal to 1 and lesser or equal to (q-1), ∘ N being the number of subcarriers in a resource block, ∘ m being an integer greater or equal to 0 and lesser than a maximum number of resource blocks, allowable in the carrier, having subcarriers of subcarrier spacing configuration Δf 1; - lesser or equal to a frequency f ref + m.N.Δf 1 + (L.N - 1).Δf 1, namely f last;