US-12621768-B2 - Method and apparatus for reducing power consumption of terminal in wireless communication system

US12621768B2US 12621768 B2US12621768 B2US 12621768B2US-12621768-B2

Abstract

The disclosure relates to a communication scheme and system for convergence between an IoT technology and a 5G communication system for supporting a higher data transfer rate beyond a 4G system. The disclosure may be applied to intelligent services (e.g. smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, and security and safety-related services), based on a 5G communication technology and an IoT-related technology. In addition, the disclosure provides a method and an apparatus for reducing the power consumption of a terminal in a wireless communication system.

Inventors

Taehyoung Kim
Heedon GHA
Jinkyu KANG
Youngbum KIM
Seunghoon Choi

Assignees

SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20240111
Priority Date: 20191224

Claims (16)

1 . A method performed by a user equipment (UE) in a communication system, the method comprising: receiving, from a base station, first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell; receiving, from the base station, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format and third information for a second search space set to monitor a second PDCCH for detection of a second DCI format; and receiving, from the base station, a DCI format for indicating SCell dormancy, wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
2 . The method of claim 1 , wherein a size of the first bitmap is equal to a number of SCell groups.
3 . The method of claim 1 , wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group corresponding to the bit, and wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
4 . A method performed by a base station in a communication system, the method comprising: transmitting, to a user equipment (UE), first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell; transmitting, to the UE, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format and third information for a second search space set to monitor a second PDCCH for detection of a second DCI format; and transmitting, to the UE, a DCI format for indicating SCell dormancy, wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
5 . The method of claim 4 , wherein a size of the first bitmap is equal to a number of SCell groups.
6 . The method of claim 4 , wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group of SCells corresponding to the bit, and wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
7 . A user equipment (UE) in a communication system, the UE comprising: a transceiver; and a controller configured to: receive, from a base station, first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell; receive, from the base station, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format; and receive, from the base station, a DCI format for indicating SCell dormancy, wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
8 . The UE of claim 7 , wherein a size of the first bitmap is equal to a number of SCell groups.
9 . The UE of claim 7 , wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group corresponding to the bit, and wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
10 . A base station in a communication system, the base station comprising: a transceiver; and a controller configured to: transmit, to a user equipment (UE), first information for a secondary cell (SCell) configuration, wherein the first information includes a dormant bandwidth part (BWP) configuration for the SCell and information indicating an SCell group for dormancy associated with the SCell; transmit, to the UE, second information for a first search space set to monitor a first physical downlink control channel (PDCCH) for detection of a first downlink control information (DCI) format and third information for a second search space set to monitor a second PDCCH for detection of a second DCI format; and transmit, to the UE, a_DCI format for indicating SCell dormancy, wherein, in case that the DCI format is a first DCI format, the first DCI format includes an SCell dormancy indication field for indicating SCell dormancy, the SCell dormancy indication field corresponding to a first bitmap where each bit is associated with a group of SCells, and wherein, in case that the DCI format is a second DCI format, the second DCI format includes a sequence of fields for indicating SCell dormancy, the sequence of fields corresponding to a second bitmap where each bit is associated with an SCell.
11 . The base station of claim 10 , wherein a size of the first bitmap is equal to a number of SCell groups.
12 . The base station of claim 10 , wherein a ‘0’ value for a bit of the first bitmap indicates a dormant BWP as an active downlink (DL) BWP for each SCell in an SCell group corresponding to the bit, and wherein a ‘1’ value for the bit of the first bitmap indicates a BWP other than the dormant BWP as the active DL BWP for each SCell in the SCell group corresponding to the bit.
13 . The method of claim 1 , wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.
14 . The method of claim 4 , wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.
15 . The UE of claim 7 , wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.
16 . The base station of claim 10 , wherein the first DCI format is DCI format 0_1, DCI format 1_1 or DCI format 2_6, and wherein the second DCI format is DCI format 1_1 satisfying predetermined conditions.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is a Continuation of U.S. patent application Ser. No. 17/982,869, filed on Nov. 8, 2022 in the U.S. Patent and Trademark Office, which is a Continuation of U.S. patent application Ser. No. 17/130,714, filed on Dec. 22, 2020 in the U.S. Patent and Trademark Office and issued as U.S. Pat. No. 11,503,542 on Nov. 15, 2022, and is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0174352, filed on Dec. 24, 2019, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety. BACKGROUND 1. Field The disclosure relates generally to a method and an apparatus for reducing the power consumption of a terminal in a wireless communication system. 2. Description of Related Art To meet the increased demand for wireless data traffic since deployment of fourth generation (4G) communication systems, efforts have been made to develop an improved fifth generation (5G) or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a “beyond 4G network” or a “Post Long-Term Evolution System (LTE)”. The 5G communication system is considered to be implemented in higher frequency millimeter wave (mmWave) bands, e.g., 60 gigahertz (GHz) bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, beamforming techniques, massive multiple-input multiple-output (MIMO) techniques, full dimensional MIMO (FD-MIMO) techniques, array antenna techniques, analog beam forming techniques, and large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, developments for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul technology, moving network technology, cooperative communication technology, coordinated multi-points (CoMP) technology, and reception-end interference cancellation technology. In the 5G system, hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) technology, sliding window superposition coding (SWSC) as an advanced coding modulation (ACM) technology, filter bank multi carrier (FBMC) technology, non-orthogonal multiple access (NOMA) technology, and sparse code multiple access (SCMA) as an advanced access technology have also been developed. The Internet is now evolving to the Internet of things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of everything (IoE), which is a combination of the IoT technology and the big data processing technology through connection with a cloud server, has emerged. As technology elements, such as “sensing technology”, “wired/wireless communication and network infrastructure”, “service interface technology”, and “security technology” have been demanded for IoT implementation, a sensor network, a machine-to-machine (M2M) communication network, and a machine type communication (MTC) network, have been recently researched. Such an IoT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home fields, smart building fields, smart city fields, smart car or connected car fields, smart grid fields, health care fields, smart appliance fields and advanced medical service fields through convergence and combination between existing information technology (IT) and various industrial applications. Various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network technologies, MTC technologies, and M2M communication technologies may be implemented by beamforming, MIMO, and array antennas. Application of a cloud radio access network (RAN), as the above-described big data processing technology, may also be considered an example of convergence of the 5G technology with the IoT technology. In view of the above description, and considering the fact that various services can be provided as a result of the development of wireless communication systems, a scheme for efficiently providing such services is needed. Particularly, there is a need for a communication method in which power consumed by terminals can be reduced in order to provide users with services for a longer period of time. SUMMARY The present disclosure has been made to address the above-mentioned problems and disadvantages, and to provide at least the advantages described below. In accordance with an aspect of the disclosure, a method performed by a user equipment (UE) in a communication system includes receiving, from a base station, first information for a se