Method for transmitting a word representative of transmission parameters respectively allocated to the mobile stations in communication with a base station

The present invention concerns a method for communicating information concerning spreading codes allocated to mobile stations in communication with a base station of a mobile telecommunication system. It comprises the steps of :selecting one or a plurality of midambles from a set of available midambles in accordance with a value of a binary element of a word representative of said information, wherein said available midambles are shifted versions of a basic midamble code, andtransmitting a general midamble being said selected midamble or a sum of said selected midambles as a representative of said word.The invention relates also to a mobile telecommunication system, a base station of a said mobile telecommunication system and a mobile station of a said mobile telecommunication system provided to perform said method.