US-12621836-B2 - Method and device for transmitting and receiving signal in wireless communication system

US12621836B2US 12621836 B2US12621836 B2US 12621836B2US-12621836-B2

Abstract

The present disclosure relates to a method and device for transmitting and receiving a signal in a wireless communication system, and an operation method of a user equipment (UE) in the wireless communication system may include receiving, from a base station, configuration information related to carrier aggregation (CA), wherein the configuration information related to the CA includes information related to cross-carrier scheduling between a primary cell (PCell) and a secondary cell (SCell), performing configuration related to the CA, based on the configuration information related to the CA, monitoring a common search space (CSS) of the PCell on the PCell and monitoring a UE-specific search space (USS) of the SCell on the SCell, based on the performed configuration related to the CA, and receiving a physical downlink control channel (PDCCH), based on the monitoring.

Inventors

Youngbum KIM
Taehyoung Kim
Hyunseok RYU
Jinyoung Oh
Seunghoon Choi

Assignees

SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20210429
Priority Date: 20200602

Claims (13)

1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station, a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling; identifying whether information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell) is configured in the configuration information; and in case that the information indicating that the PCell is scheduled by the SCell is configured, monitoring a physical downlink control channel (PDCCH) on the SCell and the PCell, wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.
2 . The method of claim 1 , wherein the information indicating that the PCell is scheduled by the SCell includes a scheduling cell identifier (ID) corresponding to the SCell and a carrier indicator field (CIF) value corresponding to the PCell.
3 . The method of claim 1 , further comprising: in case that the SCell is deactivated, stopping the monitoring of the PDCCH on the SCell.
4 . The method of claim 1 , further comprising: in case that the SCell is deactivated, stopping a physical uplink control channel (PUCCH) transmission.
5 . The method of claim 1 , wherein the configuration information associated with cross carrier scheduling is included in configuration information for the PCell.
6 . A user equipment (UE) in a wireless communication system, comprises: a transceiver; and at least one processor coupled with the transceiver and configured to: receive, from a base station, a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling; identify whether information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell) is configured in the configuration information; and in case that the information indicating that the PCell is scheduled by the SCell is configured, monitor a physical downlink control channel (PDCCH) on the SCell and the PCell, wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.
7 . The UE of claim 6 , wherein the information indicating that the PCell is scheduled by the SCell includes a scheduling Cell identifier (ID) corresponding to the SCell and a carrier indicator field (CIF) value corresponding to the PCell.
8 . The UE of claim 6 , wherein the processor is further configured to: in case that the SCell is deactivated, stop the monitoring of the PDCCH on the SCell.
9 . The UE of claim 6 , wherein the processor is further configured to: in case that the SCell is deactivated, stop a physical uplink control channel (PUCCH) transmission.
10 . The UE of claim 6 , wherein the configuration information associated with cross carrier scheduling is included in configuration information for the PCell.
11 . A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a user equipment (UE), a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling, wherein the configuration information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell); and transmitting, to the UE, a physical downlink control channel (PDCCH) on the SCell and the PCell, wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.
12 . The method of claim 11 , wherein the information indicating that the PCell is scheduled by the SCell includes a scheduling Cell identifier (ID) corresponding to the SCell and a carrier indicator field (CIF) value corresponding to the PCell.
13 . A base station in a wireless communication system, comprising: a transceiver; at least one processor coupled with the transceiver and configured to: transmit, to a user equipment (UE), a radio resource control (RRC) message including configuration information associated with a cross carrier scheduling, wherein the configuration information indicating that a primary cell (PCell) is scheduled by a secondary cell (SCell); and transmit, to the UE, a physical downlink control channel (PDCCH) on the SCell and the PCell, wherein the PDCCH schedules at least one of the PCell's physical downlink shared channel (PDSCH) or the PCell's physical uplink shared channel (PUSCH), and wherein the PDCCH on the SCell is monitored in at least one UE-specific search space (USS) configured on the SCell for the cross carrier scheduling from the SCell to the PCell.

Description

PRIORITY This application is a National Phase Entry of PCT International Application No. PCT/KR2021/005471, which was filed on Apr. 29, 2021, and claims priority to Korean Patent Application Nos. 10-2020-0066695, 10-2020-0091279, and 10-2020-0137762, which were filed on Jun. 2, 2020, Jul. 22, 2020, and Oct. 22, 2020, respectively, the entire content of each of which is incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to a method and device for transmitting and receiving a signal in a wireless communication system. BACKGROUND ART Efforts have been made to develop an improved 5th generation (5G) communication system or pre-5G communication system to keep up with growing wireless data traffic demand after the commercialization of 4th generation (4G) communication systems. For this reason, the 5G or pre-5G communication system is called a beyond 4G network communication system or a post long-term evolution (LTE) system. Implementation of 5G communication systems in an ultra-high frequency (millimeter-wave (mmWave)) band (such as a 60-GHz band) is under consideration to achieve high data transfer rates. To mitigate path loss of radio waves and increase transmission distance of radio waves in an ultra-high frequency band for 5G communication systems, technologies such as beamforming, massive multiple-input multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antennas are being studied. Furthermore, to improve system networks for 5G communication systems, various technologies including evolved small cells, advanced small cells, cloud radio access network (Cloud-RAN), ultra-dense networks, device to device (D2D) communication, wireless backhaul, moving networks, cooperative communication, coordinated multi-points (COMP), and received-interference cancellation are currently being developed. Moreover, the Internet has evolved from a human-centered connection network, in which humans create and consume information, to the Internet of things (IoT) network in which dispersed components such as objects exchange information with one another to process the information. Internet of Everything (IoE) technology has emerged, in which the IoT technology is combined with, for example, technology for processing big data through connection with a cloud server. To implement the IoT, technologies such as a sensing technology, a wired/wireless communication and network infrastructure, a service interface technology, and a security technology are required, and thus, research has recently been conducted into technologies such as sensor networks for interconnecting objects, machine to machine (M2M) communication, and machine type communication (MTC) In an IoT environment, intelligent Internet technology services may be provided to create new values for human life by collecting and analyzing data obtained from interconnected objects. The IoT may be applied to various fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, a smart grid, health care, smart home appliances, advanced medical services, etc., through convergence and integration between existing information technology (IT) and various industries. Thus, various attempts are being made to apply a 5G communication system to the IoT network. For example, technologies such as sensor networks, M2M communication, MTC, etc., are implemented using 5G communication techniques such as beamforming, MIMO, array antennas, etc. The application of a cloud RAN as the above-described big data processing technology may be an example of convergence between the 5G and IoT technologies. As various services may be provided with the advancements in wireless communication systems as described above, a method for seamlessly providing these services is required. DESCRIPTION OF EMBODIMENTS Technical Problem Based on the above discussion, the present disclosure provides a device and method for effectively providing a service in a mobile communication system. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 illustrates a basic structure of time-frequency resource domain for a 5th generation (5G) system. FIG. 2 illustrates an example of a frame structure of a 5G system. FIG. 3 illustrates another example of a frame structure for a 5G system. FIG. 4 illustrates another example of a frame structure for a 5G system. FIG. 5 illustrates a time domain mapping structure and a beam sweeping operation for a synchronization signal. FIG. 6 illustrates a random access procedure. FIG. 7 illustrates a procedure in which a user equipment (UE) reports UE capability information to a base station. FIG. 8 is a diagram illustrating a concept of carrier aggregation (CA). FIG. 9 is a diagram illustrating a self-carrier scheduling method in CA. FIG. 10 is a diagram illustrating a cross-carrier scheduling method in CA. FIG. 11A illustrates an example in which long-term evolution (LTE) and 5G systems overlap in the sa