US-12628173-B2 - Method and apparatus for transmitting and receiving data in wireless communication system

Abstract

Disclosed are a method and apparatus for transmitting and receiving data in a wireless communication system. A method for transmitting a physical uplink shared channel (PUSCH), according to an embodiment of the present disclosure, may comprise the steps of: receiving a first physical downlink control channel (PDCCH) for scheduling a first PUSCH and a second PDCCH for scheduling a second PUSCH; and transmitting the first PUSCH and the second PUSCH. The first PDCCH and the second PDCCH may be associated with different control resource sets (CORESETs) having different CORESET pool indexes, the second PDCCH may be received before the first PUSCH is transmitted after the time when the first PDCCH is received, and the first PUSCH and the second PUSCH may correspond to the same transport block (TB) on the basis of the same hybrid automatic repeat and request (HARQ) process identifier (ID) for the first PUSCH and the second PUSCH.

Inventors

• Kyuseok Kim
• Jiwon Kang
• Hyungtae Kim

Assignees

• LG ELECTRONICS INC.

Dates

Publication Date

20260512

Application Date

20210709

Priority Date

20200710

Claims (17)

1. 1 . A method comprising: receiving, by a terminal, a first physical downlink control channel (PDCCH) for scheduling a first physical uplink shared channel (PUSCH) and a second PDCCH for scheduling a second PUSCH; and transmitting, by the terminal, the first PUSCH and the second PUSCH, wherein the first PDCCH and the second PDCCH are associated with different control resource sets having different control resource set pool indexes, wherein the second PDCCH is received before transmitting the first PUSCH after receiving the first PDCCH, wherein based on the same hybrid automatic repeat and request (HARQ) process identifier (ID) for the first PUSCH and the second PUSCH, the first PUSCH and the second PUSCH correspond to the same transport block, and wherein based on individual scheduling indicated for the first PUSCH and the second PUSCH by the first PDCCH and the second PDCCH, different resource allocation sizes and different modulation and coding schemes (MCS) are indicated so that sizes of transport blocks respectively corresponding to the first PUSCH and the second PUSCH are identical.
2. 2 . The method of claim 1 , wherein the same new data indicator (NDI) value is allocated to the first PUSCH and the second PUSCH.
3. 3 . The method of claim 1 , wherein the first PUSCH and the second PUSCH are transmitted at the same time or different time in a time domain.
4. 4 . The method of claim 1 , wherein the first PDCCH and the second PDCCH are received in a first search space and a second search space determined by a predetermined configuration or higher layer signaling, respectively.
5. 5 . The method of claim 4 , wherein when different search spaces are included within a predetermined time interval in a time domain, the first search space and the second search space are determined by the predetermined configuration.
6. 6 . The method of claim 4 , wherein the same number of transmission layers is allocated for the first PUSCH and the second PUSCH.
7. 7 . The method of claim 6 , wherein based on a PDCCH received in a specific search space among the first search space and the second search space, the same number of transmission layers is determined.
8. 8 . The method of claim 7 , wherein the specific search space is determined based on one of a search space identifier, a CORESET identifier and a CORESET pool index or determined by higher layer signaling.
9. 9 . A terminal comprising: at least one transceiver for transmitting and receiving a wireless signal; at least one processor for controlling the at least one transceiver; and at least one memory connected to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising: receiving a first physical downlink control channel (PDCCH) for scheduling a first physical uplink shared channel (PUSCH) and a second PDCCH for scheduling a second PUSCH; and transmitting the first PUSCH and the second PUSCH, wherein the first PDCCH and the second PDCCH are associated with different control resource sets having different control resource set pool indexes, wherein the second PDCCH is received before transmitting the first PUSCH after receiving the first PDCCH, wherein based on the same hybrid automatic repeat and request (HARQ) process identifier (ID) for the first PUSCH and the second PUSCH, the first PUSCH and the second PUSCH correspond to the same transport block, and wherein based on individual scheduling indicated for the first PUSCH and the second PUSCH by the first PDCCH and the second PDCCH, different resource allocation sizes and different modulation and coding schemes (MCS) are indicated so that sizes of transport blocks respectively corresponding to the first PUSCH and the second PUSCH are identical.
10. 10 . A method comprising: receiving, by a terminal, a first physical downlink control channel (PDCCH) for scheduling a first physical downlink shared channel (PDSCH) and a second PDCCH for scheduling a second PDSCH; and receiving, by the terminal, the first PDSCH and the second PDSCH, wherein the first PDCCH and the second PDCCH are associated with different control resource sets having different control resource set pool indexes, wherein the second PDSCH is received before transmitting hybrid automatic repeat and request (HARQ)-acknowledgement (ACK) information for the first PDSCH, wherein based on the same hybrid automatic repeat and request (HARQ) process identifier (ID) for the first PDSCH and the second PDSCH, the first PDSCH and the second PDSCH correspond to the same transport block, and wherein based on individual scheduling indicated for the first PDSCH and the second PDSCH by the first PDCCH and the second PDCCH, different resource allocation sizes and different modulation and coding schemes (MCS) are indicated so that sizes of transport blocks respectively corresponding to the first PDSCH and the second PDSCH are identical.
11. 11 . The method of claim 10 , wherein the same new data indicator value is allocated to the first PDSCH and the second PDSCH.
12. 12 . The method of claim 10 , wherein each of HARQ-ACK information for the first PDSCH and the second PDSCH are transmitted at the same time or different time in a time domain.
13. 13 . The method of claim 10 , wherein the first PDCCH and the second PDCCH are received in a first search space and a second search space determined by a predetermined configuration or higher layer signaling, respectively.
14. 14 . The method of claim 13 , wherein when different search spaces are included within a predetermined time interval in a time domain, the first search space and the second search space are determined by the predetermined configuration.
15. 15 . The method of claim 13 , wherein the same number of transmission layers is allocated for the first PDSCH and the second PDSCH.
16. 16 . The method of claim 15 , wherein based on a PDCCH received in a specific search space among the first search space and the second search space, the same number of transmission layers is determined.
17. 17 . The method of claim 16 , wherein the specific search space is determined based on one of a search space identifier, a CORESET identifier and a CORESET pool index or determined by higher layer signaling.

Description

TECHNICAL FIELD The present disclosure relates to a wireless communication system, and in more detail, relates to a method and an apparatus of transmitting and receiving an uplink/downlink data channel in a wireless communication system. BACKGROUND ART A mobile communication system has been developed to provide a voice service while guaranteeing mobility of users. However, a mobile communication system has extended even to a data service as well as a voice service, and currently, an explosive traffic increase has caused shortage of resources and users have demanded a faster service, so a more advanced mobile communication system has been required. The requirements of a next-generation mobile communication system at large should be able to support accommodation of explosive data traffic, a remarkable increase in a transmission rate per user, accommodation of the significantly increased number of connected devices, very low End-to-End latency and high energy efficiency. To this end, a variety of technologies such as Dual Connectivity, Massive Multiple Input Multiple Output (Massive MIMO), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super wideband Support, Device Networking, etc. have been researched. DISCLOSURE Technical Problem A technical object of the present disclosure is to provide a method and an apparatus for transmitting and receiving an uplink/downlink data channel in a wireless communication system supporting multiple multi-transmission reception points (TRPs). In addition, an additional technical object of the present disclosure is to provide a method and an apparatus for scheduling different physical downlink shared channels (PDSCHs)/physical uplink shared channels (PUSCHs) corresponding to the same transport block in multiple TRP transmissions based on multiple downlink control information. The technical objects to be achieved by the present disclosure are not limited to the above-described technical objects, and other technical objects which are not described herein will be clearly understood by those skilled in the pertinent art from the following description. Technical Solution A method of transmitting a physical uplink shared channel (PUSCH) in a wireless communication system according to an aspect of the present disclosure may include: receiving a first physical downlink control channel (PDCCH) for scheduling a first PUSCH and a second PDCCH for scheduling a second PUSCH; and transmitting the first PUSCH and the second PUSCH. The first PDCCH and the second PDCCH may be associated with different control resource sets (CORESETs) having different CORESET pool indexes, the second PDCCH may be received before transmitting the first PUSCH after receiving the first PDCCH, and based on the same hybrid automatic repeat and request (HARQ) process identifier (ID) for the first PUSCH and the second PUSCH, the first PUSCH and the second PUSCH may correspond to the same transport block (TB). A method of receiving a physical downlink shared channel (PDSCH) according to an aspect of the present disclosure may include: receiving a first physical downlink control channel (PDCCH) for scheduling a first PDSCH and a second PDCCH for scheduling a second PDSCH; and receiving the first PDSCH and the second PDSCH. The first PDCCH and the second PDCCH may be associated with different control resource sets (CORESETs) having different CORESET pool indexes, the second PDSCH may be received before transmitting hybrid automatic repeat and request (HARQ)-acknowledgement (ACK) information for the first PDSCH, and based on the same hybrid automatic repeat and request (HARQ) process identifier (ID) for the first PDSCH and the second PDSCH, the first PDSCH and the second PDSCH may correspond to the same transport block (TB). Advantageous Effects According to an embodiment of the present disclosure, the same transport block may be transmitted through different PDSCHs/PUSCHs scheduled through multiple downlink control information in a wireless communication system supporting transmission and reception of multiple transmission reception points (TRPs). According to an embodiment of the present disclosure, it is possible to have a high degree of freedom in terms of downlink/uplink resource configuration by scheduling different PDSCHs/PUSCHs through different downlink control information. In addition, when scheduling a plurality of PDSCHs/PUSCHs for transmission of the same transport block, reliability of a physical downlink control channel (PDCCH) may be increased by using different PDCCHs. Effects achievable by the present disclosure are not limited to the above-described effects, and other effects which are not described herein may be clearly understood by those skilled in the pertinent art from the following description. DESCRIPTION OF DIAGRAMS Accompanying drawings included as part of detailed description for understanding the present disclosure provide embodiments of the present disclosure and describe technica