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. A communication apparatus, comprising:
second-layer processing circuitry, which, in operation, obtains, from a third layer, at least one second-layer service data unit, SDU, to be mapped onto a resource allocated for data transmission, and generates a first-type second-layer protocol data unit, PDU, including said at least one second-layer SDU and at least one second-layer control element, which is placed after any of the at least one second-layer SDU, and
first-layer processing circuitry, which, in operation, obtains the first-type second-layer PDU generated by the second-layer processing circuitry and maps the first-type second-layer PDU onto the resource allocated for data transmission,
wherein the first-layer processing circuitry, in operation, de-maps at least one second-type second-layer PDU from 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, and
wherein the second-layer processing circuitry, in operation, obtains and parses the second-type second-layer PDU de-mapped by the first-layer processing circuitry.
2. The communication apparatus 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 communication apparatus 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 communication apparatus 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 communication apparatus 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 communication apparatus 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 communication apparatus 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 communication apparatus according to claim 1 , wherein
the second-layer processing circuitry, in operation, starts forwarding packages constituting parts of the first-type second-layer PDU to the first-layer processing circuitry before completing the generation of the first-type second-layer PDU.
9. A method comprising:
obtaining, from a third layer, at least one second-layer service data unit, SDU, to be mapped onto a resource allocated for data transmission,
generating a first-type second-layer protocol data unit, PDU, including said at least one second-layer SDU and at least one second-layer control element, which is placed after any of the at least one second-layer SDU,
obtaining the first-type second-layer PDU generated by the second-layer processing and mapping the first-type second-layer PDU onto the resource allocated for data transmission,
de-mapping at least one second-type second-layer PDU from 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, and
obtaining and parsing the second-type second-layer PDU de-mapped from the resource allocated for data reception.
10. The method according to claim 9 , 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.
11. The method according to claim 10 , 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.
12. The method according to claim 11 , 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.
13. The method according to claim 10 , 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.
14. The method according to claim 9 , 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.
15. The method according to claim 9 , 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.
16. The method according to claim 9 , comprising:
starting to forward packages constituting parts of the first-type second-layer PDU to a first layer before completing the generation of the first-type second-layer PDU.