Patent ID: 6425105
Filing Date: 2002-07-23
Classification: H04L,Y02D

Abstract:
An error control apparatus for a digital transmission system having a transmission medium for performing transmission in a first and a second direction comprising:a) error detection means (3) for detecting an error in a digital signal transmitted in said first direction via said transmission medium, wherein an erroneous portion of said digital signal is stored in a storing means and used for diversity processing after retransmission has been performed; b) transmitting means (4) for transmitting a control message in said second direction via said transmission medium so as to request a retransmission of said digital signal, if said error detection means (3) detects an error in said digital signal; and c) control means (6) for controlling a transmission rate of said control message in dependence on at least one of a usage of said transmission medium in said second direction and an amount of available memory in a receiving means (5) for receiving said digital signal, wherein said control means (6) is arranged to adjust said transmission rate in accordance with an available amount of memory in said storing means.