Method and module for correcting transmission errors in a datastream, communication system comprising said module

A method for correcting transmission errors on reception in a data stream transmitted by a communication system using a stack of multilayer protocols, said method comprising:

• receiving an incoming data stream including packets of data generated by the stack of multilayer protocols, each of the data packets includes protocol fields whose content is constant for all the data packets;
• constructing a known sequence without adding information to the transmitted data stream, the known sequence including symbols characteristic of various layers of the stack of multilayer protocols and belonging to the protocol fields of the constant content;
• searching at a level of a receiver for sequences similar to the known sequence comprises:
• opening an analysis window of length equal to a length of the known sequence;
• calculating a detection threshold η;
• measuring similitude between an analyzed sequence and the known sequence;
• detecting a similar sequence when the measured similitude is greater than or equal to the detection threshold η, and non-similar sequences are not being retained;
• in a case where similar sequences are present, detecting erroneous known sequences based at least in part on the measured similitude between the similar sequences retained and the known sequence constructed;
• and
• modifying the erroneous known sequences detected.

A module for correcting transmission errors in a data stream transmitted by a communications system using a stack of multilayer protocols, the module comprising:

• an input for receiving a data stream including packets of data generated by the stack of multilayer protocols, each of the data packets includes protocol fields whose content is constant for all the data packets;
• and
• a computer processor configured to:
• construct a known sequence without adding information to the data stream transmitted, the known sequence including symbols characteristic of various layers of the stack of multilayer protocols belonging to the protocol fields of the constant content;
• search for sequences similar to the known sequence, wherein non-similar sequences are not being retained;
• and
• detect erroneous known sequences in a case where similar sequences are present and for modifying the similar sequences, wherein the detection of erroneous known sequences being carried out based at least in part on a measure of similitude between the similar sequences retained and the known sequence constructed.