Efficient multiplexing of control information in transport block
Provided are systems and methods for transmitting data over a wireless channel from a data transmitting node to a data receiving node in a communication system. The data transmitting node comprises second-layer processing circuitry for receiving at least one second-layer SDU, to be mapped onto a resource allocated for data transmission, and for generating a second-layer PDU, including the at least one second-layer SDU and at least one second-layer control element, and first-layer processing circuitry for receiving the second-layer PDU generated by the second-layer processing circuitry and for mapping the second-layer PDU onto the resource allocated for data transmission. The data receiving node comprises first-layer processing circuitry for de-mapping at least one second-layer PDU, and second layer processing circuitry for receiving and parsing the second-layer PDU demapped by the first-layer processing circuitry, the second-layer PDU including at least one second-layer SDU, and at least one second-layer control element.
1. An integrated circuit for controlling a communication apparatus, the integrated circuit comprising:
control circuitry, which, in operation, generates a first-type second-layer protocol data unit (PDU) including 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;
transmission circuitry, which, in operation, transmits the first-type second-layer PDU mapped onto a resource allocated for data transmission; and
reception circuitry, which, in operation, receives at least one second-type second-layer PDU mapped onto a resource allocated for data reception, 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 control circuitry, in operation, parses the second-type second-layer PDU de-mapped from the resource allocated for data reception,
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.
2. The integrated circuit according to claim 1 , wherein
the first-type or second-type second-layer PDU further includes:
a second-layer subheader associated with the at least one second-layer SDU, or
a second-layer subheader associated with the at least one second-layer control element.
3. The integrated circuit according to claim 2 , wherein
the at least one second-layer SDU is placed after the associated second-layer subheader and the at least one second-layer control element is placed before the associated second-layer subheader.
4. The integrated circuit according to claim 3 , wherein
the second-layer subheader includes a presence indicator indicating whether the first-type or second-type second-layer PDU includes at least one second-layer control element.
5. The integrated circuit according to claim 2 , wherein
the second-layer subheader associated with the at least one second-layer control element precedes the second-layer SDU and the second-layer subheader associated with the second-layer SDU.
6. The integrated circuit according to claim 1 , wherein
the first-type or second-type second-layer PDU includes a padding buffer status report (BSR) and a second-layer subheader associated with the padding BSR, and
the padding BSR and the second-layer subheader associated with the padding BSR are placed after any of the at least one second-layer SDU.
7. The integrated circuit according to claim 1 , wherein
the first-type second-layer PDU includes an uplink second-layer control element, and the second-type second-layer PDU includes a downlink second-layer control element.
8. The integrated circuit according to claim 1 , wherein
the control circuitry, in operation, starts forwarding packages constituting parts of the first-type second-layer PDU to first-layer processing before completing the generation of the first-type second-layer PDU.