Patent ID: 6314541
Filing Date: 2001-11-06
Classification: H04L

Abstract:
A method for computer-aided back signaling in an automatic repeat request procedure, comprising the steps of:coding an information word, which has an arbitrary number of bits, in a first computer unit into at least a first message and further messages by using a perforation code;transmitting the first message in the first computer unit to a second computer unit;receiving the first message in the second computer unit;decoding the first message in the second computer unit;checking in the second computer unit whether the first message was transmitted without errors;coding and transmitting at least one back-signaling message to the first computer unit for the case in which the first message was not transmitted without errors, wherein the back-signaling message has at least one request field with a length of exactly one bit by means of which a second message is identified;receiving and decoding the back-signaling message in the first computer unit;transmitting the requested second message to the second computer unit, wherein the requested second message contains an additional item of information relating to the first message for the purpose of error correction together with the first message in the second computer unit; andreceiving and decoding the second message in the second computer unit together with the first message;wherein a value of the at least one request field does not change upon further iterative transmissions of further back-signaling messages upon further messages being received in the second computer unit with errors.