EP-4020831-B1 - METHOD AND APPARATUS FOR CHANGING BEAM OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM

EP4020831B1EP 4020831 B1EP4020831 B1EP 4020831B1EP-4020831-B1

Inventors

JANG, Youngrok
NOH, Hoondong
PARK, Jinhyun
Ji, Hyoungju

Dates

Publication Date: 20260506
Application Date: 20200916

Claims (14)

An operating method of a base station in a wireless communication system, the operating method comprising: receiving, from a terminal, information related to a first beam switching time for transmission of an uplink signal as a capability of the terminal; determining a second beam switching time for transmission of the uplink signal, based on a type of the uplink signal, configuration information related to the uplink signal and the first beam switching time; transmitting, to the terminal, the configuration information related to the uplink signal and the second beam switching time; and receiving, from the terminal, the uplink signal, wherein the type of the uplink signal comprises at least one of a sounding reference signal, SRS, a physical uplink shared channel, PUSCH, or a physical uplink control channel, PUCCH.
The operating method of claim 1, wherein, in the case that the type of the uplink signal is the SRS, the configuration information related to the uplink signal comprises time domain transmission information of the SRS or information related to a resource set of the SRS, wherein the determining of the second beam switching time for transmission of the uplink signal based on the configuration information related to the uplink signal and the first beam switching time comprises determining the second beam switching time, based on at least one of the time domain transmission information of the SRS or the information related to the resource set of the SRS, and the first beam switching time.
The operating method of claim 1, wherein, in the case that the type of the uplink signal is the PUSCH, the configuration information related to the uplink signal comprises at least one of information about a downlink control information, DCI, format for indicating transmission of the PUSCH, information about a precoding method for the PUSCH, information related to a resource set of the SRS corresponding to the precoding method for the PUSCH, or information indicating a relationship between an antenna port number related to transmission of the PUSCH and an antenna port number related to transmission of the SRS, wherein the determining of the second beam switching time for transmission of the uplink signal based on the configuration information related to the uplink signal and the first beam switching time comprises determining the second beam switching time based on at least one of the information about the DCI format for indicating transmission of the PUSCH, the information about the precoding method for the PUSCH, the information related to the resource set of the SRS corresponding to the precoding method for the PUSCH, or the information indicating the relationship between the antenna port number related to transmission of the PUSCH and the antenna port number related to transmission of the SRS, and the first beam switching time.
The operating method of claim 1, wherein, in the case that the type of the uplink signal is the PUCCH, the configuration information related to the uplink signal comprises at least one of information related to a resource of the PUCCH comprising hybrid repeat request acknowledgement, HARQ-ACK, for a physical downlink shared channel, PDSCH, or spatial relation information related to transmission of the PUCCH, wherein the determining of the second beam switching time for transmission of the uplink signal based on the configuration information related to the uplink signal and the first beam switching time comprises determining the second beam switching time based on at least one of the information related to the resource of the PUCCH comprising HARQ-ACK for the PDSCH or the spatial relation information related to transmission of the PUCCH, and the first beam switching time.
An operating method of a terminal in a wireless communication system, the operating method comprising: determining a first beam switching time for transmission of an uplink signal; transmitting, to a base station, information related to the first beam switching time for transmission of the uplink signal as a capability of the terminal; receiving, from the base station, configuration information related to the uplink signal and information related to a second beam switching time for transmission of the uplink signal, wherein the second beam switching time is determined based on a type of the uplink signal, the first beam switching time and the configuration information related to the uplink signal; receiving, from the base station, information indicating transmission of the uplink signal; and transmitting the uplink signal to the base station, based on the configuration information related to the uplink signal and the second beam switching time, wherein the type of the uplink signal comprises at least one of a sounding reference signal, SRS, a physical uplink shared channel, PUSCH, or a physical uplink control channel, PUCCH.
The operating method of claim 5, wherein, in the case that the type of the uplink signal is the SRS, the configuration information related to the uplink signal comprises at least one of time domain transmission information of the SRS or information related to a resource set of the SRS, wherein the determining of the beam switching time for transmission of the uplink signal based on the configuration information related to the uplink signal comprises determining the beam switching time based on at least one of the time domain transmission information of the SRS or the information related to the resource set of the SRS.
The operating method of claim 5, wherein, in case that the type of the uplink signal is the PUSCH, the configuration information related to the uplink signal comprises at least one of information about a downlink control information, DCI, format for indicating transmission of the PUSCH, information about a precoding method for the PUSCH, information related to a resource set of the SRS corresponding to the precoding method for the PUSCH, or information indicating a relationship between an antenna port number related to transmission of the PUSCH and an antenna port number related to transmission of the SRS, wherein the determining of the beam switching time for transmission of the uplink signal based on the configuration information related to the uplink signal comprises determining the beam switching time based on at least one of the information about the DCI format for indicating transmission of the PUSCH, the information about the precoding method for the PUSCH, the information related to the resource set of the SRS corresponding to the precoding method for the PUSCH, or the information indicating the relationship between the antenna port number related to transmission of the PUSCH and the antenna port number related to transmission of the SRS.
The operating method of claim 5, wherein, in the case that the type of the uplink signal is the PUCCH, the configuration information related to the uplink signal comprises at least one of information related to a resource of the PUCCH comprising hybrid repeat request acknowledgement, HARQ-ACK, for a physical downlink shared channel, PDSCH, or spatial relation information related to transmission of the PUCCH, wherein the determining of the beam switching time for transmission of the uplink signal based on the configuration information related to the uplink signal comprises determining the beam switching time based on at least one of the information related to the resource of the PUCCH comprising HARQ-ACK for the PDSCH or the spatial relation information related to transmission of the PUCCH.
The operating method of claim 5, wherein, in the case that the type of the uplink signal is the SRS, the information indicating transmission of the uplink signal comprises information indicating transmission of the SRS, wherein the operating method further comprises determining, based on the beam switching time, a minimum time interval between a time point when the information indicating transmission of the SRS is received and a time point when the SRS is transmitted.
The operating method of claim 9, wherein the transmitting of the uplink signal to the base station based on the beam switching time and the information indicating transmission of the uplink signal comprises determining whether to transmit the SRS based on the information indicating transmission of the SRS, by comparing at least one of the minimum time interval or the beam switching time with a time offset between a resource to which the information indicating transmission of the SRS is allocated and at least one resource set for the SRS allocated by the information indicating transmission of the SRS.
The operating method of claim 5, wherein, in the case that the type of the uplink signal is the PUSCH, the information indicating transmission of the uplink signal comprises information indicating transmission of the PUSCH, wherein the operating method further comprises determining a PUSCH preparation procedure time for transmission of the PUSCH, based on the beam switching time.
The operating method of claim 11, wherein the transmitting of the uplink signal to the base station based on the beam switching time and the information indicating transmission of the uplink signal comprises determining whether to transmit the PUSCH based on the information indicating transmission of the PUSCH, by comparing at least one of the PUSCH preparation procedure time or the beam switching time with a time offset between a resource to which the information indicating transmission of the PUSCH is allocated and a PUSCH resource allocated by the information indicating transmission of the PUSCH.
The operating method of claim 5, wherein, in the case that the type of the uplink signal is the PUCCH, the information indicating transmission of the uplink signal comprises information indicating transmission of the PUCCH, wherein the operating method further comprises determining a time interval between a time point when a PDCCH comprising information for scheduling a physical downlink shared channel, PDSCH, is received and a time point when the PUCCH comprising HARQ-ACK for the PDSCH is transmitted.
The operating method of claim 13, wherein the transmitting of the uplink signal to the base station based on the beam switching time and the information indicating transmission of the uplink signal comprises determining whether to transmit the PUCCH based on the information indicating transmission of the PUCCH, by comparing the time interval between the time point when the PDCCH is received and the time point when the PUCCH is transmitted with the beam switching time.

Description

TECHNICAL FIELD The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for changing a beam of a terminal. BACKGROUND ART To meet the increase in demand with respect to wireless data traffic after the commercialization of 4th generation (4G) communication systems, considerable efforts have been made to develop improved 5th generation (5G) communication systems or pre-5G communication systems. For this reason, 5G or pre-5G communication systems are called beyond 4G network communication systems or post long-term evolution (post-LTE) systems. To achieve a high data rate, the implementation of 5G communication systems in an ultra-high frequency band (millimeter wave (mmWave)) (e.g., a 60 GHz band) is under consideration. To alleviate path loss of radio waves and increase propagation distances of radio waves in a millimeter wave band, technologies for 5G communication systems, such as beamforming, massive multi-input multi-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large-scale antenna system, are being discussed. Also, in order to improve a system network for 5G communication, systems, technologies, such as evolved small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), and reception interference cancellation, are being developed. In addition, for 5G communication systems, hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) and sliding window superposition coding (SWSC), which are advanced coding modulation (ACM) schemes, and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA), which are advanced access technologies, have been developed. The Internet has evolved from a human-centered connection network, through which humans generate and consume information, to an Internet of things (IoT) network that exchanges and processes information between distributed elements such as objects. An Internet of everything (IoE) technology is emerging, in which a technology related to the loT is combined with, for example, a technology for processing big data through connection with a cloud server. In order to implement the loT, various technical components are required, such as, a sensing technology, wired/wireless communication and network infrastructures, a service interfacing technology, a security technology, etc. In recent years, technologies including a sensor network for connecting objects, machine-to-machine (M2M) communication, machine type communication (MTC), etc., have been studied. In the loT environment, intelligent Internet technology (IT) services may be provided to collect and interpret data obtained from objects connected to each other, and to create new value in human life. As existing information technology (IT) and various industries converge and combine with each other, the loT may be applied to various fields, such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart home appliances, high quality medical services, etc. Various attempts are being made to apply 5G communication systems to loT networks. For example, technologies related to sensor networks, M2M communication, MTC, etc., are implemented by using 5G communication technologies including beamforming, MIMO, array antenna, etc. The application of cloud RAN as the big data processing technology described above may be an example of convergence of 5G communication technology and IoT technology. As mobile communication systems are developed, various services may be provided. Therefore, there is a demand for a method of effectively providing these services. WO 2019/099659 A1 discloses that a wireless transmit/receive unit (WTRU) may monitor control resource sets (CORESETs) to receive a physical downlink control channel (PDCCH) having downlink control information (DCI) that includes a scheduling offset and an indicated beam for a scheduled physical downlink shared channel (PDSCH) reception. US 2018/145742 A1 discloses switching between a single antenna subarray operation and a multiple antenna subarray operation for different traffic types. Qualcomm Incorporated: "Enhancements on Multi-beam Operation", 3GPP Draft; R1-1900906 Enhancements on Multi-beam Operation, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, 12 January 2019 (2019-01-12), discusses enhancements on multi-beam operation. US 2019/260456 A1 relates to methods and apparatus for providing beam switch latency using communications systems operating according to new radio (NR) technologies. DESCRIPTION OF EMBODIMENTS The invention is set out in the appended set of claims. Disclosed embodiment