Method and a Device for Improved Retransmissions

A method for use in a cellular access system, wherein a User Equipment (UE) operates in a cell in the system and a Radio Base Station (RBS) controls traffic to and from the cell, and wherein the RBS and UE exchange information with either one acting as a sending party and the other one acting as a receiving party, said method comprising:

• detecting errors in messages received by the receiving party from the sending party, via a first error detection method;
• requesting retransmission of messages in which errors are detected;
• and
• detecting erroneous retransmissions of messages without aid of the first error detection method, based on storing an order in which the receiving party requests retransmissions.

A Radio Base Station (RBS) for use in a cellular access system, for controlling of traffic to and from a cell in the system, in which cell there can be at least one User Equipment (UE) in the cell, the RBS configured to:

• receive and transmit information to and from the UE, so that the RBS can be either the sending party or the receiving party with respect to the UE;
• detect errors in messages which are received from the UE, according to a first error detection method;
• request the UE to retransmit a message in which an error has been detected;
• detect erroneously received retransmissions of messages from the UE without aid of the first error detection method, by storing the order in which the RBS requests retransmissions;
• and
• request retransmission by the UE of retransmissions that are detected as erroneously received by the RBS.

A User Equipment (UE) for use in a cellular access system that includes a Radio Base Station (RBS) for the control of traffic to and from a cell in the system in which cell the UE can be used, wherein the UE is configured to:

• receive and transmit information to and from the RBS, so that the UE can be either the sending party or the receiving party with respect to the RBS;
• detect errors in messages which are received from the RBS, according to a first error detection method;
• request the RBS to retransmit a message in which an error has been detected;
• detect erroneously received retransmissions of messages from the RBS without aid of the first error detection method, based on storing the order in which the UE requests retransmissions.