| CPC H04W 72/0466 (2013.01) [H04L 1/0078 (2013.01); H04W 8/02 (2013.01); H04L 1/1664 (2013.01); H04L 27/345 (2013.01); H04W 80/02 (2013.01); H04W 88/16 (2013.01)] | 15 Claims |

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1. A communication entity, comprising:
a receiver, which, in operation, receives a first-type second-layer protocol data unit (PDU) mapped onto a resource allocated for data reception, wherein the first-type second-layer PDU includes at least one second-layer service data unit (SDU) and at least one second-layer control element, which is placed after any of the at least one second-layer SDU; and
a transmitter, which, in operation, transmits at least one second-type second-layer PDU mapped onto a resource allocated for data transmission, wherein the second-type second-layer PDU includes at least one second-layer SDU and at least one second-layer control element, which precedes any of the at least one second-layer SDU;
wherein the first-type second-layer PDU and the second-type second-layer PDU are generated dependent on a type of second-layer control element to be included in the first-type second-layer PDU or the second-type second-layer PDU, and
wherein the type of second-layer control element to be included in the first-type second-layer PDU includes at least a power headroom report and the type of second-layer control element to be included in the second-type second-layer PDU includes at least one of activation/deactivation commands or a contention resolution message.
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