| CPC H04L 1/1861 (2013.01) | 17 Claims |

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1. A method of operating a feedback radio node in a wireless communication network, the method comprising transmitting acknowledgement signaling according to an acknowledgement codebook, the acknowledgement codebook representing acknowledgement information based on an acknowledgement association window, the acknowledgement association window comprising a plurality of groups of symbols, each group in the plurality of groups being associated to an acknowledgement information substructure of the acknowledgement codebook, different groups of the plurality of groups each comprising a different number of symbols.
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