CPC H04L 5/0048 (2013.01) [H04L 5/0053 (2013.01); H04L 5/0094 (2013.01); H04W 72/12 (2013.01); H04L 1/00 (2013.01); H04L 5/0007 (2013.01)] | 25 Claims |
1. A data communication apparatus, for transmitting one or more blocks of data within a frame comprising a two-dimensional grid of transmission symbol positions,
wherein the data communication apparatus is configured to select a group of transmission symbol positions, which is a subset of the two-dimensional grid of transmission symbol positions, for a transmission of a data portion,
wherein one or more reference symbol positions are associated to the selected group of transmission symbol positions;
wherein the data communication apparatus is configured to determine which one or more symbol positions are used as one or more reference symbol positions based on the selection of the group of transmission symbol positions or together with the selection of the group of transmission symbol positions; and
wherein the reference symbol positions are variable with respect to one or more borders of time slots of the frame or with respect to one or more borders of sub-frames of the frame, and/or
wherein the one or more reference symbol positions are variable with respect to the selected group of transmission symbol positions;
wherein the location of the reference symbol positions with respect to one or more borders of time slots of the frame or with respect to one or more borders of sub-frames of the frame vary in dependence on an actual selection of a group of transmission symbol positions;
wherein the data communication apparatus is configured to select a group of transmission symbol positions with a granularity which is smaller than a length of a sub-frame or which is smaller than a length of a slot.
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