Patent ID: 6901113

Claim:
Method of processing X streams of information symbols to be transmitted on Y communication channels, X and Y being positive integers, wherein the Y communication channels simultaneously occupy a transmission resource organized as successive frames, wherein the successive frames include compressed-mode frames each having at least one inactive period during which no symbol is transmitted, wherein the information symbols of each stream i (1≦i≦X) are transmitted in successive transmission time intervals each comprising F i consecutive frames, F i being a positive integer, and wherein, for each transmission time interval relating to a stream i (1≦i≦X), integers E i , ΔN i TTI and ΔN i CM are defined such that E i> 0, ΔN i CM< 0 if said transmission time interval comprises at least one compressed-mode frame and ΔN i CM =0 if said transmission time interval does not comprise any compressed-mode frame, the method comprising the following steps for each transmission time interval relating to a stream i (1≦i ≦X): forming a first sequence of E i coded symbols from information symbols of said stream pertaining to said transmission time interval; forming a second sequence of symbols including E i +ΔN i TTI +ΔN i CM symbols extracted from the first sequence and −ΔN i CM marked symbols; forming a third sequence of symbols by a permutation of the symbols of the second sequence; distributing the symbols of the third sequence into F i segments of consecutive symbols, the F i segments being respectively assigned to the frames of said transmission time interval; and for each frame of said transmission time interval, forming a fourth sequence of symbols extracted from the segment assigned to said frame, said permutation and the placing of the marked symbols in the second sequence when said transmission time interval comprises at least one compressed-mode frame being such that each marked symbol belongs, in the third sequence, to a segment assigned to a compressed-mode frame, and the following steps for each frame: forming a fifth sequence of symbols including the symbols of the fourth sequence output for, said frame in relation to each stream; distributing the symbols of the fifth sequence into Y segments of symbols, the Y segments being respectively assigned to the Y communication channels; for each communication channel, forming a sixth sequence of symbols extracted from the segment assigned to said communication channel; for each communication channel, forming a seventh sequence of symbols by a permutation of the symbols of the sixth sequence; and transmitting on each conmmunication channel, in time slots of said frame, symbols extracted from the seventh sequence, each of said marked symbols being deleted before transmission on each communication channel when said frame is in compressed mode, so as to provide said inactive period within the frame.