Decoding method

Abstract

A decoding method for decoding information content in at least one data packet, which is transmitted from a sender to a receiver via a data link. The information is represented by a bit sequence, which is transformed into a transmittable redundancy version. The information is initially transmitted for a first time in a first data packet from the sender to the receiver. The information is represented by a first redundancy version, which is self-decodable. An incorrect receipt is confirmed by sending a confirmation from the receiver to the sender. The information is retransmitted at least a second time in a second data packet from the sender to the receiver upon receipt of the confirmation, wherein, for representation of the information, a second redundancy version is used, the selection of which is performed in dependence on a coding parameter, describing whether the redundancy version is self-decodable or not.

1 . Decoding method for decoding an information content contained in at least one data packet, which is transmitted from a sender (UE) to a receiver (BS) via a data link (E-DCH) wherein said information is represented by a bit sequence, which is transformed into a transmittable redundancy version and wherein
 a. Initial transmitting of the information for a first time in a first data packet from the sender (UE) to the receiver (BS), wherein the information is represented by a first redundancy version, which is self-decodable;   b. Confirming of an incorrect receipt by sending a confirmation from the receiver (BS) to the sender (UE);   c. Retransmitting the information at least a second time in a second data packet from the sender (UE) to the receiver (BS) upon receipt of a confirmation in step b), wherein for representation of the information a second redundancy version is used, the selection of which is performed in dependence on a coding parameter, describing whether the redundancy version is self-decodable or not.   
     
     
         2 . Method according to  claim 1 , wherein the selection in step c) is based on a puncturing parameter describing, whether the redundancy version has been produced with or without a puncturing of the bit sequence. 
     
     
         3 . Method according to  claim 1 , wherein the selection in step c) is based on a further rate parameter describing the coding rate, used for transforming the bit sequence into a redundancy version. 
     
     
         4 . Method according to  claim 3 , wherein by the rate parameter a self-decodable redundancy version is chosen, if the coding rate is lower or equal to a upper coding rate boundary condition. 
     
     
         5 . Method according to  claim 3 , wherein by the rate parameter a self-decodable redundancy version is chosen, if the coding rate is higher or equal to a lower coding rate boundary condition. 
     
     
         6 . Method according to  claim 1 , wherein the selection in step c) is based on a transmission number parameter describing the number n of retransmissions of information in a n-th data packet. 
     
     
         7 . Method according to  claim 6 , wherein a set of redundancy versions can be derived from the bit sequence and for a first range of numbers of transmissions a first subset of this set of redundancy versions is available and for a further range of numbers of transmissions a further subset is available. 
     
     
         8 . Method according to  claim 7 , wherein the first subset and the second subset are partly or completely distinct. 
     
     
         9 . Method according to  claim 6 , wherein the further subset is a superset of the first subset. 
     
     
         10 . Method according to  claim 1 , wherein at least a second information content is sent analogously to the first information content and wherein the number of information contents sent in parallel is determined and this number is used as process number parameter for the selection of the redundancy version. 
     
     
         11 . Method according to  claim 1  wherein a soft-handover parameter is used for the selection in step c), which is determined in dependence on whether a soft handover from the first receiver (BS) to a second receiver is performed, wherein for a certain time interval a data link is established to the first receiver and to the second receiver. 
     
     
         12 . Method according to  claim 1 , wherein at least two out of the parameters are combined to a superior parameter. 
     
     
         13 . Method according to  claim 1 , wherein further a control confirmation for incorrect reception is foreseen upon receipt of a control confirmation the transmission number parameter is reset to an original value. 
     
     
         14 . Method according to  claim 1 , wherein the redundancy version is described by a parameter s, which denotes, whether the redundancy version is self decodable.