Patent ID: 8705466

Claim:
A method in a second node of obtaining precoding information in a control message from a first node, the control message containing information that describes properties of an associated wireless data transmission between the first and second nodes employing spatial multiplexing and precoding information for sending codewords corresponding to transport blocks in said wireless data transmission, comprising the steps of: node, and detecting said precoding parameters by decoding control information bits in at least one precoding information field of the control message by means of values in payload size related fields in the control message, wherein said values are used to interpret said control information bits in the precoding information field(s); wherein said payload size related fields indicate a payload size pair corresponding to the payload size of a first transport block and a second transport block, and said payload size pair is set to indicate: that a first codeword is enabled while a second codeword is disabled, or that two codewords are enabled.