Method and device for delineating a data stream and communication system comprising said device

A method for delineating a data stream transmitted by a communication system using a multilayer protocol stack, comprising a receiver, said method comprising the following steps:

• reception of an incoming data stream comprising data packets with protocol header fields, the content of which is constant for all the data packets of the stream;
• the construction of at least one known sequence SP from the constant content protocol fields;
• the search for and detection of, in the receiver, sequences similar to the known sequence SP, the non-similar sequences not being retained
• the determination of the positions of the similar sequences that have been detected;
• and
• the storage of the positions of the similar sequences that have been detected in order to determine information with which to delineate the stream.