| CPC H04L 5/0082 (2013.01) [H04L 1/0003 (2013.01); H04L 5/0048 (2013.01); H04L 5/0055 (2013.01); H04L 27/2613 (2013.01)] | 16 Claims |

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1. A method of operating a radio node in a wireless communication network, the method comprising:
communicating utilising data signaling according to a signaling structure, the signaling structure including a signaling time interval covering a plurality of subsequent allocation units, each of the allocation units of the signaling time interval having associated one of reference signaling and a part of one of one or more data blocks, each data block being associated to a different acknowledgement signaling process, each different acknowledgement signaling process being associated to one or more of: a different process ID, a different data stream, a different transmission layer, and a different buffer;
there being associated reference signaling to two allocation units that are separated by a separation interval, the separation interval being a time period between the reference signaling associated to a first of the two allocation units and the reference signaling associated to a second of the two allocation units; and
the separation interval having a duration spanning a plurality of allocation units, the duration, in number of allocation units, being dependent on at least one of a number of data blocks, a size of one or more of the data blocks, a modulation scheme, and a coding scheme used for transmitting the data signaling.
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