Method and apparatus for reducing uplink overhead in mobile communications

Patent metadata

Field	Value
Publication number	US-10855403-B2
Application number	US-201916261396-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Feb 13, 2018
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

Various solutions for reducing uplink overhead with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether to multiplex hybrid automatic repeat request-acknowledgement (HARQ-ACK) information in a physical uplink shared channel (PUSCH) transmission. The apparatus may determine whether only a physical downlink shared channel (PDSCH) is received. The apparatus may generate only the HARQ-ACK information corresponding to the PDSCH in an event that only the PDSCH is received. The apparatus may transmit the HARQ-ACK information in the PUSCH transmission.

First claim

What is claimed is:

1. A method, comprising:
determining, by a processor of an apparatus, whether to multiplex hybrid automatic repeat request-acknowledgement (HARQ-ACK) information in a physical uplink shared channel (PUSCH) transmission;
determining, by the processor, that only a physical downlink shared channel (PDSCH) is received;
receiving, by the processor, a downlink control information (DCI) transmission;
generating, by the processor, only the HARQ-ACK information corresponding to the PDSCH in an event that only the PDSCH is received and despite determining to multiplex the HARQ-ACK information; and
transmitting, by the processor, the HARQ-ACK information in the PUSCH transmission,
wherein, in response to a downlink assignment index (DAI) field in the DCI being assigned or the PDSCH being received from a primary cell (PCell), the HARQ-ACK information comprises a single HARQ-ACK corresponding to the received PDSCH instead of a full HARQ-ACK codebook to result in reduced uplink overhead.

2. The method of claim 1 , wherein the PUSCH transmission is not scheduled by a downlink control information (DCI) format.

3. The method of claim 1 , wherein the PUSCH transmission is scheduled by a downlink control information (DCI) format 0_0.

4. The method of claim 1 , wherein the PUSCH transmission is scheduled by a downlink control information (DCI) format 0_1.

5. The method of claim 1 , wherein the PDSCH comprises a semi-persistent scheduling (SPS) PDSCH release or a SPS PDSCH reception.

6. The method of claim 1 , wherein the PDSCH is scheduled by a downlink control information (DCI) format 1_0.

7. The method of claim 1 , wherein the generating comprises cancelling generation of a full HARQ-ACK codebook.

8. The method of claim 1 , wherein the generating comprises reducing a control overhead of the HARQ-ACK information.

9. The method of claim 1 , further comprising:
determining, by the processor, whether no PDSCH is received; and
cancelling, by the processor, generation of the HARQ-ACK information in an event that no PDSCH is received.

10. An apparatus, comprising:
a transceiver capable of wirelessly communicating with a network node of a wireless network; and
a processor communicatively coupled to the transceiver, the processor capable of:
determining whether to multiplex hybrid automatic repeat request-acknowledgement (HARQ-ACK) information in a physical uplink shared channel (PUSCH) transmission;
determining that only a physical downlink shared channel (PDSCH) is received;
receiving, via the transceiver, a downlink control information (DCI) transmission;
generating only the HARQ-ACK information corresponding to the PDSCH in an event that only the PDSCH is received and despite determining to multiplex the HARQ-ACK information; and
transmitting, via the transceiver, the HARQ-ACK information in the PUSCH transmission to the network node,

wherein, in response to a downlink assignment index (DAI) field in the DCI being assigned or the PDSCH being received from a primary cell (PCell), the HARQ-ACK information comprises a single HARQ-ACK corresponding to the received PDSCH instead of a full HARQ-ACK codebook to result in reduced uplink overhead.

11. The apparatus of claim 10 , wherein the PUSCH transmission is not scheduled by a downlink control information (DCI) format.

12. The apparatus of claim 10 , wherein the PUSCH transmission is scheduled by a downlink control information (DCI) format 0_0.

13. The apparatus of claim 10 , wherein the PUSCH transmission is scheduled by a downlink control information (DCI) format 0_1.

14. The apparatus of claim 10 , wherein the PDSCH comprises a semi-persistent scheduling (SPS) PDSCH release or a SPS PDSCH reception.

15. The apparatus of claim 10 , wherein the PDSCH is scheduled by a downlink control information (DCI) format 1_0.

16. The apparatus of claim 10 , wherein, in generating only the HARQ-ACK information corresponding to the PDSCH, the processor is capable of cancelling generation of a full HARQ-ACK codebook.

17. The apparatus of claim 10 , wherein, in generating only the HARQ-ACK information corresponding to the PDSCH, the processor is capable of reducing a control overhead of the HARQ-ACK information.

18. The apparatus of claim 10 , wherein the processor is further capable of:
determining whether no PDSCH is received; and
cancelling generation of the HARQ-ACK information in an event that no PDSCH is received.

Assignees

• Mediatek Singapore Pte Ltd

Inventors

• Medles Abdelkader

Classifications

• H04L1/1664 Primary

  the supervisory signal being transmitted together with payload signals; piggybacking · CPC title

• H04L1/1854

  Scheduling and prioritising arrangements · CPC title

• H04L1/1812 Primary

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04W72/1268

  of uplink data flows · CPC title