WO2024071953A1

WO2024071953A1 - Method and device for transmitting and receiving sps and cg for network energy saving in wireless communication system

Info

Publication number: WO2024071953A1
Application number: PCT/KR2023/014751
Authority: WO
Inventors: 백상규; 아지왈아닐; 정병훈
Original assignee: 삼성전자 주식회사
Priority date: 2022-09-27
Filing date: 2023-09-26
Publication date: 2024-04-04
Also published as: KR20240043445A

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. The present disclosure provides an operation method of a terminal, comprising the steps of: receiving, from a base station, information about a first bandwidth part (BWP) and a second BWP, and configuration information about periodic resources configured for each of the first BWP and the second BWP; receiving, from the base station, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP; performing data transmission and reception on the basis of the activated first periodic resource; receiving, from the base station, active BWP change information activating the second BWP; and suspending use of the activated first periodic resource set in the first BWP, wherein the suspended use of the first periodic resource is resumed without receiving the first downlink control information when the first BWP is activated.

Description

SPS and CG transmission and reception method and device for saving network energy in wireless communication system

This disclosure relates to terminal and base station operations in a wireless communication system, and specifically relates to a method and device for transmitting and receiving SPS and CG for network power reduction.

5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and includes sub-6 GHz ('Sub 6GHz') bands such as 3.5 gigahertz (3.5 GHz) as well as millimeter wave (mm) bands such as 28 GHz and 39 GHz. It is also possible to implement it in the ultra-high frequency band ('Above 6GHz') called Wave. In addition, in the case of 6G mobile communication technology, which is called the system of Beyond 5G, Terra is working to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low delay time that is reduced to one-tenth. Implementation in Terahertz bands (e.g., 95 GHz to 3 THz) is being considered.

In the early days of 5G mobile communication technology, there were concerns about ultra-wideband services (enhanced Mobile BroadBand, eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC). With the goal of satisfying service support and performance requirements, efficient use of ultra-high frequency resources, including beamforming and massive array multiple input/output (Massive MIMO) to alleviate radio wave path loss in ultra-high frequency bands and increase radio transmission distance. Various numerology support (multiple subcarrier interval operation, etc.) and dynamic operation of slot format, initial access technology to support multi-beam transmission and broadband, definition and operation of BWP (Band-Width Part), large capacity New channel coding methods such as LDPC (Low Density Parity Check) codes for data transmission and Polar Code for highly reliable transmission of control information, L2 pre-processing, and dedicated services specialized for specific services. Standardization of network slicing, etc., which provides networks, has been carried out.

Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology, considering the services that 5G mobile communication technology was intended to support, based on the vehicle's own location and status information. V2X (Vehicle-to-Everything) to help autonomous vehicles make driving decisions and increase user convenience, and NR-U (New Radio Unlicensed), which aims to operate a system that meets various regulatory requirements in unlicensed bands. ), NR terminal low power consumption technology (UE Power Saving), Non-Terrestrial Network (NTN), which is direct terminal-satellite communication to secure coverage in areas where communication with the terrestrial network is impossible, positioning, etc. Physical layer standardization for technology is in progress.

In addition, IAB (IAB) provides a node for expanding the network service area by integrating intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, and wireless backhaul links and access links. Integrated Access and Backhaul, Mobility Enhancement including Conditional Handover and DAPS (Dual Active Protocol Stack) handover, and 2-step Random Access (2-step RACH for simplification of random access procedures) Standardization in the field of wireless interface architecture/protocol for technologies such as NR) is also in progress, and 5G baseline for incorporating Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technology Standardization in the field of system architecture/services for architecture (e.g., Service based Architecture, Service based Interface) and Mobile Edge Computing (MEC), which provides services based on the location of the terminal, is also in progress.

When this 5G mobile communication system is commercialized, an explosive increase in connected devices will be connected to the communication network. Accordingly, it is expected that strengthening the functions and performance of the 5G mobile communication system and integrated operation of connected devices will be necessary. To this end, eXtended Reality (XR) and Artificial Intelligence are designed to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR). , AI) and machine learning (ML), new research will be conducted on 5G performance improvement and complexity reduction, AI service support, metaverse service support, and drone communication.

In addition, the development of these 5G mobile communication systems includes new waveforms, full dimensional MIMO (FD-MIMO), and array antennas to ensure coverage in the terahertz band of 6G mobile communication technology. , multi-antenna transmission technology such as Large Scale Antenna, metamaterial-based lens and antenna to improve coverage of terahertz band signals, high-dimensional spatial multiplexing technology using OAM (Orbital Angular Momentum), RIS ( In addition to Reconfigurable Intelligent Surface technology, Full Duplex technology, satellite, and AI (Artificial Intelligence) to improve the frequency efficiency of 6G mobile communication technology and system network are utilized from the design stage and end-to-end. -to-End) Development of AI-based communication technology that realizes system optimization by internalizing AI support functions, and next-generation distributed computing technology that realizes services of complexity beyond the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. It could be the basis for .

As various services can be provided as described above and with the development of mobile communication systems, methods for effectively providing these services are required, and in particular, methods for reducing network power are required.

The disclosed embodiment seeks to provide an apparatus and method that can effectively provide services in a wireless communication system.

According to an embodiment of the present disclosure, in a method performed by a user equipment (UE) in a wireless communication system, from a base station, information about a first bandwidth part (BWP) and a second BWP, and Receiving configuration information about periodic resources configured in each of the first BWP and the second BWP; Receiving downlink control information; performing data transmission and reception based on the activated first periodic resource; Receiving active BWP change information activating a second BWP from the base station; and suspending use of the activated first periodic resource set in the first BWP, wherein the suspended use of the first periodic resource is performed by the first BWP when the first BWP is activated. 1 It may be resumed without receiving downlink control information.

In addition, according to an embodiment of the present disclosure, in a method performed by a base station in a wireless communication system, the terminal includes information about a first bandwidth part (BWP) and a second BWP, and Transmitting configuration information about periodic resources configured for each of the first BWP and the second BWP; Transmitting, to the terminal, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP; performing data transmission and reception based on the activated first periodic resource; Transmitting active BWP change information activating a second BWP to the terminal; and suspending use of the activated first periodic resource set in the first BWP, wherein the suspended use of the first periodic resource is performed by the first BWP when the first BWP is activated. 1 It may be resumed without transmission of downlink control information.

Additionally, according to an embodiment of the present disclosure, in a terminal (user equipment, UE) in a wireless communication system, the terminal includes a transceiver; Includes a controller connected to the transceiver, wherein the controller receives information about the first bandwidth part (BWP) and the second BWP from the base station, and sets each of the first BWP and the second BWP. Receiving configuration information for periodic resources; Receiving, from the base station, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP; performing data transmission and reception based on the activated first periodic resource; Receiving active BWP change information activating a second BWP from the base station; and suspending use of the activated first periodic resource set in the first BWP, wherein use of the suspended first periodic resource is performed when the first BWP is activated. 1 Can be configured to resume without receiving downlink control information.

Additionally, according to an embodiment of the present disclosure, in a base station in a wireless communication system, the base station includes a transceiver; Includes a controller connected to the transceiver, wherein the controller is a terminal, sets information on a first bandwidth part (BWP) and a second BWP, and sets each of the first BWP and the second BWP. transmitting configuration information for periodic resources; Transmitting, to the terminal, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP; performing data transmission and reception based on the activated first periodic resource; Transmitting active BWP change information activating a second BWP to the terminal; and suspending use of the activated first periodic resource set in the first BWP, wherein use of the suspended first periodic resource is performed when the first BWP is activated. 1 Can be configured to resume without transmitting downlink control information.

Embodiments of the present disclosure provide an apparatus and method that can effectively provide services in a wireless communication system.

Figure 1 is a diagram showing a semi-persistent scheduling (SPS) transmission and reception method according to bandwidth part (BWP) switching according to an embodiment of the present disclosure.

Figure 2 is a diagram showing a CG (Configured Grant) transmission and reception method according to BWP conversion according to an embodiment of the present disclosure.

Figure 3 is a diagram showing an SPS transmission and reception method according to BWP switching according to an embodiment of the present disclosure.

Figure 4 is a diagram showing a CG transmission and reception method according to BWP switching according to an embodiment of the present disclosure.

Figure 5 is a diagram showing a message format for setting the format of SPS or CG according to an embodiment of the present disclosure.

Figure 6 is a diagram showing a transmission and reception method based on an SPS group according to an embodiment of the present disclosure.

Figure 7 is a diagram showing a transmission and reception method based on a CG group according to an embodiment of the present disclosure.

Figure 8 is a diagram showing a transmission and reception method based on an SPS group according to an embodiment of the present disclosure.

Figure 9 is a diagram showing a transmission and reception method based on a CG group according to an embodiment of the present disclosure.

Figure 10 is a diagram showing a CG transmission and reception method according to BWP switching according to an embodiment of the present disclosure.

Figure 11 is a diagram showing a UE Capability transmission and RRC setting method according to an embodiment of the present disclosure.

Figure 12 is a diagram showing the structure of a base station according to an embodiment of the present disclosure.

Figure 13 is a diagram showing the structure of a terminal according to an embodiment of the present disclosure.

In the following description of the present disclosure, if a detailed description of a related known function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of the functions in the present disclosure, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification. Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings.

The advantages and features of the present disclosure and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms, and the present embodiments are merely intended to ensure that the disclosure is complete and that common knowledge in the technical field to which the present disclosure pertains is provided. It is provided to fully inform those who have the scope of the disclosure, and the disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

At this time, it will be understood that each block of the processing flow diagrams and combinations of the flow diagram diagrams can be performed by computer program instructions. These computer program instructions can be mounted on a processor of a general-purpose computer, special-purpose computer, or other programmable data processing equipment, so that the instructions performed through the processor of the computer or other programmable data processing equipment are described in the flow chart block(s). It creates the means to perform functions. These computer program instructions may also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular manner, so that the computer-usable or computer-readable memory It is also possible to produce manufactured items containing instruction means that perform the functions described in the flowchart block(s). Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so that a series of operational steps are performed on the computer or other programmable data processing equipment to create a process that is executed by the computer, thereby generating a process that is executed by the computer or other programmable data processing equipment. Instructions that perform processing equipment may also provide steps for executing the functions described in the flow diagram block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). Additionally, it should be noted that in some alternative execution examples it is possible for the functions mentioned in the blocks to occur out of order. For example, it is possible for two blocks shown in succession to be performed substantially simultaneously, or it is possible for the blocks to be performed in reverse order depending on the corresponding function.

At this time, the term '~unit' used in this embodiment refers to software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and '~unit' performs certain roles. do. However, '~part' is not limited to software or hardware. The '~ part' may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Therefore, as an example, '~ part' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and 'parts' may be combined into a smaller number of components and 'parts' or may be further separated into additional components and 'parts'. Additionally, components and 'parts' may be implemented to regenerate one or more CPUs within a device or a secure multimedia card. Additionally, in an embodiment, '~ part' may include one or more processors.

In the following description of the present disclosure, if a detailed description of a related known function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings.

Terms used in the following description to identify a connection node, terms referring to network entities, terms referring to messages, terms referring to interfaces between network objects, and various identification information. Referring terms, etc. are exemplified for convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, and other terms referring to objects having equivalent technical meaning may be used.

In the following description, physical channel and signal may be used interchangeably with data or control signals. For example, PDSCH (physical downlink shared channel) is a term that refers to a physical channel through which data is transmitted, but PDSCH can also be used to refer to data. That is, in the present disclosure, the expression 'transmit a physical channel' can be interpreted equivalently to the expression 'transmit data or a signal through a physical channel'.

Hereinafter, in this disclosure, upper signaling refers to a signal transmission method in which a signal is transmitted from a base station to a terminal using a downlink data channel of the physical layer, or from the terminal to the base station using an uplink data channel of the physical layer. High-level signaling can be understood as radio resource control (RRC) signaling or media access control (MAC) control element (CE).

For convenience of description below, the present disclosure uses terms and names defined in the 3rd Generation Partnership Project NR (New Radio) (3GPP NR) or 3rd Generation Partnership Project Long Term Evolution (3GPP LTE) specifications. However, the present disclosure is not limited by the above terms and names, and can be equally applied to systems complying with other standards. In this disclosure, gNB may be used interchangeably with eNB for convenience of explanation. That is, a base station described as an eNB may represent a gNB. Additionally, the term terminal can refer to mobile phones, MTC devices, NB-IoT devices, sensors, as well as other wireless communication devices.

Hereinafter, the base station is the entity that performs resource allocation for the terminal, and may be at least one of gNodeB (gNB), eNode B (eNB), NodeB, BS (Base Station), wireless access unit, base station controller, or node on the network. . A terminal may include a UE (User Equipment), MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions. Of course, it is not limited to the above example.

In particular, the present disclosure is applicable to 3GPP NR (5th generation mobile communication standard). In addition, this disclosure provides intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security and safety-related services) based on 5G communication technology and IoT-related technology. etc.) can be applied. In this disclosure, eNB may be used interchangeably with gNB for convenience of explanation. That is, a base station described as an eNB may represent a gNB. Additionally, the term terminal can refer to mobile phones, NB-IoT devices, sensors, as well as other wireless communication devices.

Wireless communication systems have moved away from providing early voice-oriented services to, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), and LTE-Advanced. Broadband wireless that provides high-speed, high-quality packet data services such as communication standards such as (LTE-A), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), UMB (Ultra Mobile Broadband), and IEEE's 802.16e. It is evolving into a communication system.

As a representative example of a broadband wireless communication system, the LTE system uses Orthogonal Frequency Division Multiplexing (OFDM) in the downlink (DL), and Single Carrier Frequency Division Multiple Access (SC-FDMA) in the uplink (UL). ) method is adopted. Uplink refers to a wireless link in which a terminal (UE; User Equipment or MS; Mobile Station) transmits data or control signals to a base station (eNode B or BS; Base Station), and downlink refers to a wireless link in which the base station transmits data or control signals to the terminal. It refers to a wireless link that transmits signals. The multiple access method described above differentiates each user's data or control information by allocating and operating the time-frequency resources to carry data or control information for each user so that they do not overlap, that is, orthogonality is established. .

As a future communication system after LTE, that is, the 5G communication system must be able to freely reflect the various requirements of users and service providers, so services that simultaneously satisfy various requirements must be supported. Services considered for the 5G communication system include Enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC). There is.

According to some embodiments, eMBB may aim to provide more improved data transmission rates than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to provide a peak data rate of 20Gbps in the downlink and 10Gbps in the uplink from the perspective of one base station. In addition, the 5G communication system may need to provide the maximum transmission rate and at the same time provide an increased user perceived data rate. In order to meet these requirements, the 5G communication system may require improvements in various transmission and reception technologies, including more advanced multi-antenna (MIMO; Multi Input Multi Output) transmission technology. In addition, while the current LTE transmits signals using a maximum of 20 MHz transmission bandwidth in the 2 GHz band, the 5G communication system uses a frequency bandwidth wider than 20 MHz in the 3 to 6 GHz or above 6 GHz frequency band, meeting the requirements of the 5G communication system. Data transfer speed can be satisfied.

At the same time, mMTC is being considered to support application services such as Internet of Things (IoT) in 5G communication systems. In order to efficiently provide the Internet of Things, mMTC may require support for access to a large number of terminals within a cell, improved coverage of terminals, improved battery time, and reduced terminal costs. Since the Internet of Things provides communication functions by attaching various sensors and various devices, it must be able to support a large number of terminals (for example, 1,000,000 terminals/km2) within a cell. Additionally, due to the nature of the service, terminals supporting mMTC are likely to be located in shadow areas that cannot be covered by cells, such as the basement of a building, so wider coverage may be required compared to other services provided by the 5G communication system. Terminals that support mMTC must be composed of low-cost terminals, and since it is difficult to frequently replace the terminal's battery, a very long battery life time, such as 10 to 15 years, may be required.

Lastly, in the case of URLLC, it is a cellular-based wireless communication service used for specific purposes (mission-critical), such as remote control of robots or machinery, industrial automation, It can be used for services such as unmanned aerial vehicles, remote health care, and emergency alerts. Therefore, the communication provided by URLLC may need to provide very low latency (ultra-low latency) and very high reliability (ultra-reliability). For example, a service supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds and may have a packet error rate of less than 10-5. Therefore, for services supporting URLLC, the 5G system must provide a smaller Transmit Time Interval (TTI) than other services, and at the same time, a design that requires allocating wide resources in the frequency band to ensure the reliability of the communication link. Specifications may be required.

The three services considered in the above-described 5G communication system, namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted in one system. At this time, different transmission/reception techniques and transmission/reception parameters can be used between services to satisfy the different requirements of each service. However, the above-described mMTC, URLLC, and eMBB are only examples of different service types, and the service types to which this disclosure is applied are not limited to the above-described examples.

In addition, hereinafter, embodiments of the present disclosure will be described using LTE, LTE-A, LTE Pro, or 5G (or NR, next-generation mobile communication) systems as examples, but the present disclosure may also be applied to other communication systems with similar technical background or channel type. Examples of may be applied. Additionally, the embodiments of the present disclosure may be applied to other communication systems through some modifications without significantly departing from the scope of the present disclosure at the discretion of a person with skilled technical knowledge.

Figure 1 is a diagram showing an SPS operation method according to BWP conversion according to an embodiment of the present disclosure.

In a wireless communication system, a base station periodically sets up a downlink (transmitted by the base station to the terminal) to transmit periodic data such as voice or URLLC (Ultra Reliable and Low Latency Communications) data that requires low latency. You can set up SPS (Semi-Persistent Scheduling) resources, which are wireless resources.

According to an embodiment of the present disclosure, SPS resources may be configured by an RRC (Radio Resource Control) reconfiguration message transmitted from the base station to the terminal. SPS resources can be set to a predetermined BWP (Bandwidth Part). The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of Figure 1, two BWPs, BWP A (101) and BWP B (102), are set, and BWP A (101) has periodic SPS transmission resources (111, 112, 113, 114, 115, and 116). It indicates that other periodic SPS transmission resources (121, 122, 123, 124, 125, 126) are set in BWP B (102).

Referring to FIG. 1, after the SPS transmission resources are set, the base station sends the UE to the UE in the DCI (Downlink Control Information) message of the PDCCH (Physical Downlink Control Channel) using CS-RNTI (Configured Scheduling - Radio Network Temporary Identity) of the SPS resources. Activation can be instructed. When activation of the SPS resource is indicated, the SPS transmission resource for which activation has been indicated can be used and the terminal can receive data using the SPS resource from the base station. The embodiment of Figure 1 shows that the base station instructs the terminal to activate the SPS transmission resource set in BWP A (101), the currently active BWP, using CS-RNTI (131). Afterwards, the

SPS transmission resources

111 and 112 set in BWP A (101) are activated and the terminal can receive data.

Transmission of data using SPS resources can only be performed when the BWP with SPS configured is activated. When BWP B (102) is not Active BWP, the SPS transmission resources (121, 122, 125, 126) set in BWP B (102) may not be used. In addition, the exact location of the SPS resource may not be set.

If Active BWP is later changed to BWP B (102), the SPS resources set in BWP A (101), the existing Active BWP, are deleted and the SPS resources (113, 114) of BWP A are not used. The SPS set in BWP B (102), which is an active BWP, is not activated immediately, but the SPS resources (123, 124) may be activated when the SPS transmission resource set in BWP B is activated using the CS-RNTI (141). Likewise, if Active BWP is later changed back to BWP A (101), the SPS resources set in BWP B (102), the existing Active BWP, will be cleared and the SPS resources (125, 126) of BWP B (102) will be used. It doesn't work. The SPS set in BWP A (101), which is an active BWP, is not activated immediately, but the SPS resources (115, 116) may be activated when the SPS transmission resource set in BWP B is activated using the CS-RNTI (151).

If BWP switch operations that change the Active BWP of the terminal occur frequently, the base station may frequently send messages (e.g., CS-RNTI (131, 141, 151)) instructing the terminal to activate SPS resources. . In particular, when an operation in which the Active BWP is changed periodically at a set time is performed, repeated messages instructing activation of SPS resources may result in waste of PDCCH resources. The operation of changing the Active BWP can be performed frequently for network energy saving (Network Energy Saving, NES).

Figure 2 is a diagram showing a CG operation method according to BWP conversion according to an embodiment of the present disclosure.

In a wireless communication system, a base station periodically sets up an uplink to the terminal to transmit periodic data such as voice or URLLC (Ultra Reliable and Low Latency Communications) data that requires low latency (the terminal transmits to the base station). ) You can set the CG (Configured Grant) resource, which is a wireless resource.

According to an embodiment of the present disclosure, CG resources may be configured by an RRC (Radio Resource Control) reconfiguration message transmitted from the base station to the terminal. CG resources can be set on BWP (Bandwidth Part). The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of FIG. 2, two BWPs, BWP A (201) and BWP B (202), are set, and BWP A (201) has periodic CG transmission resources (211, 212, 213, 214, 215, and 216). It indicates that other periodic CG transmission resources (221, 222, 223, 224, 225, 226) are set in BWP B (202).

According to an embodiment of the present disclosure, CG resources may be divided into first type CG and second type CG. The first type CG may refer to a CG resource that is used immediately after being set by an RRC reset message, and the second type CG may refer to a CG resource that the base station provides to the UE after the CG transmission resource is set by the RRC reset message. Temporary Identity) may be used to indicate a CG resource that indicates activation of the CG resource in a DCI (Downlink Control Information) message of PDCCH (Physical Downlink Control Channel).

The embodiment of Figure 2 shows the operation of the second type CG resource. When activation of a CG resource is indicated, the CG transmission resource for which activation has been indicated can actually be used and the terminal can transmit data using the CG resource to the base station. The embodiment of Figure 2 shows that the base station instructs the terminal to activate the CG transmission resource set in BWP A (201), the currently active BWP, using CS-RNTI (231). Afterwards, the

CG transmission resources

211 and 212 set in BWP A (201) are activated and the terminal performs data transmission.

Transmission of data using CG resources can be performed only when the BWP with CG configured is activated. When BWP B (202) is not Active BWP, the CG transmission resources (221, 222, 225, 226) set in BWP B (202) are not actually used. In addition, the exact location of the corresponding CG resource may not be set.

If Active BWP is later changed to BWP B (202), the CG resources set in BWP A (201), which is the Active BWP, are cleared and the CG resources (213, 214) of BWP A (201) are not used. . The CG set in BWP B (202), which is an active BWP, is not activated immediately, and when the CG transmission resource set in BWP B (202) is activated using the CS-RNTI (241), the CG resources (223, 224) are activated. You can. Likewise, if Active BWP is later changed back to BWP A (201), the CG resources set in BWP B (202), the existing Active BWP, will be deleted and the CG resources (225, 226) of BWP B (202) will be used. It doesn't work. The CG set in BWP A (201), which is an active BWP, is not activated immediately, and when the CG transmission resource set in BWP B (202) is activated using the CS-RNTI (251), the CG resources (215, 216) are activated. You can.

If BWP switch operations that change the UE's Active BWP occur frequently, the base station may frequently need to send messages (e.g., CS-RNTI (231, 241, 251)) instructing the UE to activate CG resources. . In particular, when an operation in which the Active BWP is changed periodically at a set time is performed, repeated messages instructing activation of CG resources may result in waste of PDCCH resources. The operation of changing the Active BWP can be performed frequently for network energy saving (Network Energy Saving, NES).

Figure 3 is a diagram showing an SPS operation method according to BWP conversion according to an embodiment of the present disclosure.

When the base station configures SPS resources, which are downlink (transmitted from the base station to the terminal) radio resources periodically configured to the terminal, the SPS resource can be set by an RRC reconfiguration message sent by the base station to the terminal. This SPS resource can be configured on top of BWP. The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of FIG. 3, two BWPs, BWP A (301) and BWP B (302), are set, and BWP A (301) has periodic SPS transmission resources (311, 312, 313, 314, 315, and 316). It indicates that other periodic SPS transmission resources (321, 322, 323, 324, 325, 326) are set in BWP B (302). After SPS transmission resources are set, the base station can instruct the terminal to activate SPS resources in a DCI (Downlink Control Information) message of PDCCH (Physical Downlink Control Channel) using CS-RNTI (Configured Scheduling - Radio Network Temporary Identity). . When activation of SPS resources is indicated, the SPS transmission resources for which activation has been indicated can actually be used and the terminal can receive data using the SPS resources from the base station. The embodiment of Figure 3 shows that the base station instructs the terminal to activate the SPS transmission resource set in BWP A (301), the currently active BWP, using CS-RNTI (331). Afterwards, the

SPS transmission resources

311 and 312 set in BWP A are activated and the terminal performs data reception.

Transmission of data using SPS resources can only be performed when the BWP with SPS configured is activated. When BWP B (302) is not Active BWP, the SPS transmission resources (321, 322, 325, 326) set in BWP B (302) may not be used. In addition, the exact location of the SPS resource may not be set.

If Active BWP is later changed to BWP B, the SPS resources set in BWP A (301), the existing Active BWP, are suspended (332) and the SPS resources (313, 314) of BWP A (301) are not used. . However, the locations of SPS resources (313, 314, 315, 316) set in BWP A are maintained by the terminal and base station, and can be prepared for use when BWP A (301) becomes Active BWP again. In other words, the terminal and the base station can maintain, store, or deactivate the configuration information regarding the SPS resources configured in BWP A (301).

In the case of SPS set in BWP B (302), which is an active BWP, if it has been previously activated, data transmission using SPS resources (323, 324) can be resumed (333) immediately without an activation step using CS-RNTI. Likewise, if Active BWP is later changed back to BWP A (301), the SPS resources set in BWP B (302), the existing Active BWP, are suspended (343) and the SPS resources (325, 326) of BWP B (302) ) is not used. However, the location of the SPS resources (325, 326) set in BWP B are maintained by the terminal and the base station, and can be prepared for use when BWP B (302) becomes Active BWP again.

In the case of the SPS set in BWP A (301), which is an active BWP, the SPS resources (315, 316) can be resumed (342) immediately without an activation step using CS-RNTI because it has been activated before.

According to the method proposed in the embodiment of FIG. 3, even when BWP switch operations that change the Active BWP of the terminal occur frequently, the base station sends a message (e.g., CS-RNTI (331)) instructing the terminal to activate SPS resources. There is no need to send frequently. In particular, when an operation in which the Active BWP is changed periodically at a set time is performed, a message instructing repeated activation of SPS resources has the advantage of reducing the problem of waste of PDCCH resources.

According to an embodiment of the present disclosure, if the previously activated SPS resource does not become Active BWP, the BWP to which the SPS resource belongs stops receiving using the SPS resource and later becomes Active BWP without a separate activation process. The type of SPS that performs the operation of resuming SPS resources may be set separately.

Figure 4 is a diagram showing a CG operation method according to BWP conversion according to an embodiment of the present disclosure.

When the base station configures the CG resource, which is an uplink (transmitted from the terminal to the base station) radio resource periodically configured to the terminal, the CG resource may be set by an RRC reconfiguration message transmitted by the base station to the terminal. This CG resource can be set on top of BWP. The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of FIG. 4, two BWPs, BWP A (401) and BWP B (402), are set, and periodic CG transmission resources (411, 412, 413, 414, 415, 416) are provided in BWP A (401). It indicates that other periodic CG transmission resources (421, 422, 423, 424, 425, 426) are set in BWP B (402).

According to an embodiment of the present disclosure, CG resources may be divided into first type CG and second type CG. The first format CG refers to a CG resource that is used immediately after being set by an RRC reset message, and the second format CG refers to a CS-RNTI (Configured Scheduling - Radio Network Temporary Identity) that the base station provides to the UE after the CG transmission resource is set by the RRC reset message. ) can be used to indicate a CG resource that indicates activation of the CG resource in a DCI (Downlink Control Information) message of PDCCH (Physical Downlink Control Channel).

The embodiment of Figure 4 shows the operation of the second type CG resource. When activation of a CG resource is indicated, the CG transmission resource for which activation has been indicated can actually be used and the terminal can transmit data using the CG resource to the base station. The embodiment of Figure 4 shows that the base station instructs the terminal to activate the CG transmission resource set in BWP A (401), the currently active BWP, using CS-RNTI (431). Afterwards, the CG transmission resources 411 and 412 set in BWP A are activated and the terminal performs data transmission.

Transmission of data using CG resources can be performed only when the BWP with CG configured is activated. When BWP B (402) is not Active BWP, the CG transmission resources (421, 422, 425, 426) set in BWP B (402) are not actually used. In addition, the exact location of the corresponding CG resource may not be set.

If Active BWP is later changed to BWP B, the CG resources set in BWP A (401), the existing Active BWP, are suspended (432) and the CG resources of BWP A are not used. (413, 414) However, the location of the CG resources (413, 414, 415, 416) set in BWP A are maintained by the terminal and base station, and can be prepared for use when BWP A (401) becomes Active BWP again. . In other words, the terminal and the base station can maintain, store, or deactivate the configuration information regarding the SPS resources configured in BWP A (401).

In the case of a CG set in BWP B (402), which is an active BWP, if it has been previously activated, data transmission using CG resources (423, 424) can be resumed (433) immediately without an activation step using CS-RNTI. Likewise, if Active BWP is later changed back to BWP A (401), the CG resources set in BWP B (402), which is the existing Active BWP, are suspended (443) and the CG resources (425, 426) of BWP B (402) ) is not used. However, the locations of CG resources (425, 426) set in BWP B (402) are maintained by the terminal and base station, and can be prepared for use when BWP B (402) becomes Active BWP again.

In the case of the CG set in BWP A (401), which is an active BWP, since it has previously been activated, the CG resources (415, 416) can be resumed (442) immediately without an activation step using CS-RNTI. According to the method proposed in the embodiment of FIG. 4, even when BWP switch operations that change the Active BWP of the terminal occur frequently, the base station sends a message (e.g., CS-RNTI (431)) instructing the terminal to activate CG resources. There is no need to send frequently. In particular, when an operation in which the Active BWP is changed periodically at a set time is performed, a message instructing repeated activation of CG resources has the advantage of reducing the problem of waste of PDCCH resources.

According to an embodiment of the present disclosure, if the previously activated CG resource does not become Active BWP, the BWP to which the CG resource belongs stops receiving using the CG resource, and if it later becomes Active BWP, it is activated without a separate activation process. The type (Type) of the CG that performs the operation of resuming CG resources may be set separately.

The second type CG can be cleared when the BWP is deactivated and becomes a BWP rather than an Active BWP. In addition, as suggested in Figure 4, it is a CG resource that uses CS-RNTI to instruct the activation of the CG resource in the DCI message of the PDCCH, but even if the BWP is deactivated, it is not deleted but is suspended and then resumed after becoming Active BWP ( The format of CG that Resume can be newly defined.

According to an embodiment of the present disclosure, it is a CG resource that uses CS-RNTI to indicate activation of the CG resource in the DCI message of the PDCCH, but even if the BWP is deactivated, it is not deleted and is suspended and then re-activated after becoming Active BWP. The CG format that resumes can be called the third format.

SPS can be cleared when the BWP is deactivated and becomes a BWP rather than an Active BWP. Depending on the embodiment, this SPS may be called a first type SPS. In addition, as suggested in Figure 3, it is an SPS resource that uses CS-RNTI to instruct the activation of the SPS resource in the DCI message of the PDCCH, but even if the BWP is deactivated, it is not deleted but is suspended and then resumed after becoming Active BWP ( The format of SPS (Resume) can be newly defined.

According to an embodiment of the present disclosure, it is an SPS resource that uses CS-RNTI to indicate activation of the SPS resource in the DCI message of the PDCCH, but even if the BWP is deactivated, it is not deleted and is suspended and then restarted after becoming Active BWP. The SPS format that resumes can be called the second type SPS.

Various types of CG or SPS may be defined and each may have different characteristics, but what they have in common is that resource information such as the period is set as an uplink or downlink resource that is set periodically. According to an embodiment of the present disclosure, an operation to change the format of each CG or SPS resource may be required. Changing the format of CG or SPS can bring about effects such as reducing the number of used wireless resources by reducing the number of message transmissions and enabling low-latency transmission by minimizing inactive wireless resources, depending on the wireless resource operation status of the base station. there is.

To this end, the embodiment of FIG. 5 shows the format of a message that changes the format of CG or SPS. The embodiment of Figure 5 shows a CG/SPS format change message in MAC CE (Medium Access Control - Control Element) format transmitted from the base station to the terminal. Of course, it is also possible to change the CG/SPS format through a message format other than the MAC CE format. For example, change in CG/SPS format may also be possible through messages such as RRC signaling rather than MAC CE.

According to an embodiment of the present disclosure, the CG/SPS format change message includes a 1-bit CG/SPS field 510, a 5-bit Index field 520, and a 2-bit Type field 530. You can have all or part of them. Of course, it is not limited to the above example and the number of bits in each field can be changed.

According to an embodiment of the present disclosure, the CG/SPS field 510 refers to a field indicating whether the type of resource whose format is to be changed is uplink CG or downlink SPS, and the values of 0 and 1 indicate whether it is CG or SPS, respectively. Or it may be a meaningful value. (Conversely, 0 may mean SPS and 1 may mean CG.) The index field 520 may indicate the index value of CG or SPS whose format is to be changed.

According to an embodiment of the present disclosure, the value indicated in the index field 520 may be a unique CG or SPS index value (in another embodiment, it may be Identity) within the MAC device. Additionally, according to an embodiment of the present disclosure, the value indicated in the index field 520 may be the index value of a unique CG or SPS within the BWP through which this MAC CE is transmitted.

According to an embodiment of the present disclosure, the format field 530 may be a value that sets what type of CG or SPS the corresponding CG or SPS is. For example, in the case of CG, the format field 530 may be set to a value corresponding to one of the first format, second format, and third format described above. CG/SPS format change MAC CE can be transmitted from the base station to the terminal. For this purpose, the configuration information of the CG or SPS may be set in the RRC reset message in advance, and the format of the CG or SPS may be dynamically changed by the MAC CE.

According to an embodiment of the present disclosure, when the terminal receives a CG/SPS format change MAC CE, it can change the format of the corresponding CG or SPS. In addition, when the base station sets the CG or SPS format to the terminal, the CG or SPS format can be set as the initial value. For example, the base station may set the default CG or SPS format to the terminal. If the format of CG or SPS can be changed by MAC CE, all necessary information can be set in the CG or SPS configuration information regardless of format. However, depending on the format applied, only some of the information can be actually used. For example, in the case of Type 2 CG, the MCS (Modulation and Coding Scheme) value used can be set by an RRC message, but in Type 2 CG, the MCS value is ignored and not used, and the MCS value indicated by DCI is used. It can be applied. However, when the format is changed to Type 1 CG, the MCS value can be used.

Figure 6 is a diagram showing the operation method of an SPS group according to an embodiment of the present disclosure.

According to an embodiment of the present disclosure, when the base station sets up an SPS resource, which is a downlink radio resource (transmitted from the base station to the terminal) periodically configured to the terminal, the SPS resource is set by an RRC reset message sent by the base station to the terminal. can be set. SPS resources can be configured on top of BWP. The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of Figure 6, two BWPs, BWP A (601) and BWP B (602), are set, periodic SPS transmission resources (611, 612, 613, 614) are set in BWP A (601), and BWP B (602) indicates that other periodic SPS transmission resources (621, 622, 623, 624) are set. It is assumed that the SPS set in BWP A (601) has an SPS index value (603) of 2, and the SPS set in BWP B (602) has an SPS index value (604) of 3. The SPS of index 2 (603) and the SPS of index 3 (604) are set to the same SPS group and have an SPS group index (605) of 1 indicating which group it is.

According to an embodiment of the present disclosure, SPS resources of the same SPS group may be activated or deactivated at the same time. Additionally, according to an embodiment of the present disclosure, the SPS group can be set by an RRC reset message.

After the SPS transmission resources are set, the base station can instruct the terminal to activate the SPS group in the DCI (Downlink Control Information) message of the PDCCH (Physical Downlink Control Channel) using CS-RNTI (Configured Scheduling - Radio Network Temporary Identity). . Activation of an SPS group can be performed by indicating which SPS group's SPS resource is meant to be activated based on the SPS group index included in the DCI. When activation of an SPS group is indicated, all SPS transmission resources within the corresponding SPS group may be activated. And by including the configuration information of each SPS transmission resource in the DCI message, the exact location of the resource and other configuration information can be set.

The embodiment of FIG. 6 shows that the base station instructs the terminal to activate the SPS group with an SPS index 605 of 1 using the CS-RNTI 631. Afterwards, the

SPS transmission resources

611 and 612 set in BWP A (601) are activated and the terminal performs data reception. Transmission of data using SPS resources can only be performed when the BWP with SPS configured is activated. Since BWP B (602) is not an Active BWP at this point, the SPS resource with an SPS index (604) of 3 set in BWP B (602) is immediately stopped as soon as it is activated by resource initialization ( Suspended (625), making SPS transmission resources (621, 622) unusable.

If Active BWP is later changed to BWP B (602), the SPS resources set in BWP (601)A, the existing Active BWP, are suspended (632) and the SPS resources (613, 614) of BWP A (601) are suspended. Not used. However, the location of the SPS resources (613, 614) set in BWP A are maintained by the terminal and the base station and can be prepared for use when BWP A becomes Active BWP again. In other words, the terminal and the base station can maintain, store, or deactivate the configuration information regarding the SPS resources configured in BWP A (601).

In the case of the SPS set in BWP B (602), which is an active BWP, the SPS resources (623, 624) can be resumed (633) immediately without an activation step using CS-RNTI because the SPS group was previously activated. Afterwards, the base station may instruct the UE to deactivate the SPS group with an SPS group index 605 of 1 in the DCI message of the PDCCH using the CS-RNTI 641. Deactivation of an SPS group can indicate deactivation of SPS resources of which SPS group by including an SPS group index in the DCI, and when deactivation of an SPS group is indicated, all SPS transmission resources within the group of the corresponding SPS may be deactivated. This operation of activating and deactivating an SPS group by setting it has the advantage of reducing the waste of wireless resources caused by transmitting a separate message to activate SPS transmission resources.

Figure 7 is a diagram showing the operation method of a CG group according to an embodiment of the present disclosure.

According to an embodiment of the present disclosure, when the base station sets up a CG resource, which is an uplink (transmitted from the terminal to the base station) radio resource periodically configured to the terminal, the CG resource is configured by an RRC reset message transmitted by the base station to the terminal. can be set. This CG resource can be set on top of BWP. The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of Figure 7, two BWPs, BWP A (701) and BWP B (702), are set, and periodic CG transmission resources (711, 712, 713, 714) are set in BWP A (701) and BWP B (702) indicates that other periodic CG transmission resources (721, 722, 723, 724) are set. It is assumed that the CG set in BWP A (701) has a CG index value (703) of 2, and the CG set in BWP B (702) has a CG index value (704) of 3. The CG at index 2 (703) and the CG at index 3 (704) are set to the same CG group and have a CG group index (705) of 1 indicating which group it is.

According to an embodiment of the present disclosure, CG resources of the same CG group may be activated or deactivated at the same time. Additionally, according to an embodiment of the present disclosure, the CG group can be set by an RRC reset message.

After the CG transmission resources are set, the base station can instruct the terminal to activate the CG group in the DCI (Downlink Control Information) message of the PDCCH (Physical Downlink Control Channel) using CS-RNTI (Configured Scheduling - Radio Network Temporary Identity). . Activation of a CG group can be performed by indicating which CG group's CG resource is meant to be activated based on the CG group index included in the DCI, and when activation of the CG group is indicated, all CG transmission resources within the group of the corresponding CG are activated. It can be. In addition, by including the configuration information of each CG transmission resource in the DCI message, the exact location of the resource and other configuration information can be set.

The embodiment of FIG. 7 shows that the base station instructs the terminal to activate a CG group with a CG index 705 of 1 using the CS-RNTI 731. Afterwards, the CG transmission resources ((711, 712)) set in BWP A (701) are activated and the terminal performs data transmission. Transmission of data using CG resources can be performed only when the BWP with CG configured is activated. Since BWP B (702) is not an Active BWP at this point, the CG resource with a CG index of 3 set in BWP B (702) is immediately suspended as soon as it is activated by resource initialization. (725) CG transmission resources (721, 722) become unavailable

If the Active BWP is later changed to BWP B (702), the CG resources set in BWP A (701), the existing Active BWP, are suspended (732) and the CG resources of BWP (702)A are not used. (713, 714) However, the location of the CG resource (713, 714) set in BWP A is maintained by the terminal and the base station and can be prepared for use when BWP A becomes Active BWP again. In other words, the terminal and the base station can maintain, store, or deactivate the configuration information regarding the SPS resources configured in BWP A (701).

In the case of CG set in BWP B (702), which is an active BWP, CG resources (723, 724) can be resumed (733) immediately without an activation step using CS-RNTI because the CG group was previously activated. Afterwards, the base station may instruct the UE to deactivate the CG group with a CG group index 705 of 1 in the DCI message of the PDCCH using the CS-RNTI 741. Deactivation of a CG group may indicate deactivation of CG resources of which CG group by including a CG group index in the DCI, and when deactivation of a CG group is indicated, all CG transmission resources within the group of the corresponding CG may be deactivated. This operation of activating and deactivating a CG group by setting it has the advantage of reducing the waste of wireless resources caused by transmitting a separate message for activating CG transmission resources.

Figure 8 is a diagram showing the operation method of an SPS group according to an embodiment of the present disclosure.

In the embodiment of FIG. 8, one BWP 801 among the BWPs of cell A and a BWP 802 among the BWPs of cell B are shown, but each cell may be configured with one or more BWPs. Periodic SPS transmission resources (811, 812, 813, 814) are set in Cell A's BWP (801), and other periodic SPS transmission resources (821, 822, 823, 824) are set in Cell B's BWP (802). indicates that It is assumed that the SPS set in the BWP 801 of cell A has an SPS index value 803 of 2, and the SPS set in the BWP 802 of cell B has an SPS index value 804 of 3. The SPS of index 2 (803) and the SPS of index 3 (804) are set to the same SPS group and have an SPS group index (805) of 1 indicating which group it is.

The embodiment of FIG. 8 shows a method of using only one SPS at a specific time within a plurality of SPSs set as an SPS group. In a wireless communication network, there can be one Active BWP per cell at a specific time, and SPS transmission resources set in a BWP other than the Active BWP cannot be used. SPS resources can be used for data transmission that continues to occur periodically, and at this time, the inability to use SPS resources due to BWP being disabled may reduce transmission efficiency. Conversely, there may be no need to use more than one SPS resource within an SPS group. Therefore, an operation using the SPS resources of one of the SPSs set within the SPS group may be necessary. For this purpose, the priority of SPS resources within the SPS group can be set.

In the embodiment of FIG. 8, the SPS with an SPS index 803 of 2 set in the BWP 801 of cell A is the Primary SPS, and the SPS index 804 of 3 set in the BWP 802 of cell B is the Primary SPS. This indicates an operation in which the SPS with an SPS index of 2 has priority by setting the SPS as a secondary SPS.

Specifically, if the primary SPS resource is currently set to Active BWP, the terminal can receive data using the primary SPS resource. If the primary SPS resource is not a resource currently set in Active BWP (if it is a resource set in a deactivated BWP), data reception can be performed using the secondary SPS resource.

In the embodiment of FIG. 8, when the BWP (801) of Cell A where the primary SPS is set is in the Active BWP state, data is received using the resources (811, 812) of the primary SPS, and the BWP (801) of Cell A When is deactivated, the resources (813, 814) of the primary SPS cannot be used, so data can be received using the secondary SPS resources (823, 824) set in the BWP (802) of Cell B. Information about which SPS will be the primary SPS can be set together when the SPS is set in the RRC reset message.

Figure 9 is a diagram showing the operation method of a CG group according to an embodiment of the present disclosure.

According to an embodiment of the present disclosure, when the base station sets up a CG resource, which is an uplink (transmitted from the terminal to the base station) radio resource periodically configured to the terminal, the CG resource is configured by an RRC reset message transmitted by the base station to the terminal. can be set. CG resources can be set on top of BWP. The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of FIG. 9, one BWP 901 among the BWPs of cell A and a BWP 902 among the BWPs of cell B are shown, but each cell may be configured with one or more BWPs. Periodic CG transmission resources (911, 912, 913, 914) are set in Cell A's BWP (901), and other periodic CG transmission resources (921, 922, 923, 924) are set in Cell B's BWP (902). indicates that It is assumed that the CG set in the BWP (901) of cell A has a CG index value (903) of 2, and the CG set in the BWP (902) of cell B is assumed to have a CG index value (904) of 3. The CG at index 2 and the CG at index 3 are set to the same CG group and have a CG group index 905 of 1 indicating which group it is.

The embodiment of FIG. 9 shows a method of using only one CG at a specific time within a plurality of CGs set as a CG group. In a wireless communication network, there can be one Active BWP per cell at a specific time, and CG transmission resources set in a BWP other than the Active BWP cannot be used. CG resources can be used for data transmission that continues to occur periodically, and at this time, the inability to use CG resources due to BWP being deactivated may reduce transmission efficiency. Conversely, there may be no need to use more than one CG resource within a CG group. Therefore, an operation using the CG resource of one of the CGs set within the CG group may be necessary. For this purpose, the priority of CG resources within the CG group can be set.

In the embodiment of FIG. 9, the CG with a CG index 903 of 2 set in the BWP 901 of cell A is the Primary CG, and the CG index 904 of 3 set in the BWP 902 of cell B is the primary CG. By setting the branch CG to Secondary CG, it indicates that the CG with a CG index of 2 has priority.

Specifically, if the primary CG resource is currently set in Active BWP, the terminal can transmit data using the primary CG resource. If the primary CG resource is not a resource currently set in Active BWP (if it is a resource set in a deactivated BWP), data transmission can be performed using the secondary CG resource.

In the embodiment of FIG. 8, when the BWP 901 of Cell A in which the primary CG is set is in the Active BWP state, data is transmitted using the resources 911 and 912 of the primary CG, and when the BWP is deactivated, the primary CG Since the resources (913, 914) cannot be used, data transmission can be performed using the secondary CG resources (923, 924) set in the BWP (902) of Cell B. Information on which CG will be the primary CG can be set together when the CG is set in the RRC reset message.

Figure 10 is a diagram showing a CG operation method according to BWP conversion according to an embodiment of the present disclosure.

According to an embodiment of the present disclosure, when the base station sets up a CG resource, which is an uplink (transmitted from the terminal to the base station) radio resource periodically configured to the terminal, the CG resource is configured by an RRC reset message transmitted by the base station to the terminal. can be set. (1031) This CG resource can be set on top of the BWP. The base station may set at least one BWP, and at least one BWP may be activated or deactivated by the base station. The activated BWP is called Active BWP.

In the embodiment of Figure 10, two BWPs, BWP A (1001) and BWP B (1002), are set, and BWP A (1001) has periodic CG transmission resources (1011, 1012, 1013, 1014, 1015, 1016). It indicates that other periodic CG transmission resources (1021, 1022, 1023, 1024, 1025, 1026) are set in BWP B (1002). 10, it is assumed that the CG set in BWP A (1001) and the CG set in BWP B (1002) have the same offset (1060) and period (1061), but may have different offsets and periods.

10 shows the operation of the first type CG resource in the embodiment. Therefore, as soon as the CG resource is set, the corresponding CG transmission resource can be actually used without a separate activation operation, and the terminal can transmit data using the CG resource to the base station. For the first type CG resource, the base station determines the offset (1060) value at which the CG resource starts using the Reference SFN (System Frame Number) value set by the RRC reset message at the time the terminal sets the CG resource, and then at a certain period. Periodic CG resources can be set to repeat every (1061). In the embodiment of FIG. 10, since the CG has been set, it indicates that the terminal can use the CG transmission resources set in BWP A (1001), which is the currently active BWP. Afterwards, the CG transmission resources (1011, 1012) set in BWP A (1001) are activated and the terminal can perform data transmission.

Transmission of data using CG resources can be performed only when the BWP with CG configured is activated. When BWP B (1002) is not Active BWP, the CG transmission resources (1021, 1022, 1025, 1026) set in BWP B (1002) are not actually used. In addition, the exact location of the corresponding CG resource may not be set.

If Active BWP is later changed to BWP B (1002), the CG resources set in BWP A (1001), the existing Active BWP, are suspended (1032) and the CG resources (1013, 1014) of BWP A are not used. . However, the locations of CG resources (1013, 1014, 1015, 1016) set in BWP A (1001) are maintained by the terminal and base station, and can be prepared for use when BWP A (1001) becomes Active BWP again. This means that the base station sets periodic CG resources using the Reference SFN (System Frame Number) at the time the terminal sets the CG resources, and the CG resources are repeated at regular intervals. In other words, even if the BWP is deactivated, the terminal has the location information of the CG resource, and can use the CG resource with the same period (interval) even when the BWP becomes active. To this end, when the BWP is deactivated, the CG resource can be suspended and then when the BWP becomes active, the CG resource can be resumed.

According to an embodiment of the present disclosure, the operation of resuming CG resources may serve to cause the transmission points (1011, 1021) of the CG resources starting from the time when the CG is set to repeat at a certain period (1061). In the case of the first type CG set in BWP B (1002), which is an active BWP, CG resources (1023, 1024) can be resumed (1033) immediately without a separate activation step. Likewise, if the Active BWP is later changed back to BWP A (1001), the CG resources set in BWP B, the existing Active BWP, are suspended (1043) and the CG resources (1025, 1026) of BWP B are not used. However, the locations of CG resources (1025, 1026) set in BWP B (1002) are maintained by the terminal and base station and can be prepared for use when BWP B (1002) becomes Active BWP again. In the case of the first type CG set in BWP A (1001), which is an active BWP, CG resources (1015, 1016) can be resumed (1042) immediately without a separate activation step. By following the method proposed in the embodiment of FIG. 10, the period of CG resources can be kept constant even when a BWP switch operation that changes the terminal's Active BWP occurs.

According to an embodiment of the present disclosure, the terminal 1110 may transmit the terminal capability information for the SPS and CG operations described above to the base station 1120. In one embodiment, when a BWP for which an SPS or CG transmission resource is set is deactivated, the SPS or CG resource is stopped without being deleted, and later, when the BWP is activated again as an Active BWP, the terminal resumes the SPS or SPS resource. It can report to the base station whether the terminal supports the operation.

Additionally, according to an embodiment of the present disclosure, it may be reported whether the terminal supports format change of SPS or CG by MAC CE. Additionally, the terminal may report to the base station whether the terminal supports operations according to the SPS group or CG group.

In addition, according to an embodiment of the present disclosure, the terminal may report to the base station whether the terminal supports the operation of the terminal to save network energy. (1130) Based on this, the base station can set the operation supported by the terminal by RRC message. (1140) The information set here may be at least one of terminal operation for network energy saving, CG settings, and SPS settings.

Referring to FIG. 12, the base station may include a transceiver 1210, a control unit 1220, and a storage unit 1230. The transceiver unit 1210, control unit 1220, and storage unit 1230 may operate according to the communication method of the base station described above. Additionally, network devices may also correspond to the structure of the base station. However, the components of the base station are not limited to the above examples. For example, a base station may include more or fewer components than those described above. In addition, the transceiver 1210, control unit 1220, and storage unit 1230 may be implemented in the form of a single chip.

The transceiving unit 1210 is a general term for the receiving unit of the base station and the transmitting unit of the base station, and can transmit and receive signals with a terminal, another base station, or other network devices. At this time, the transmitted and received signals may include control information and data. For example, the transceiver 1210 may transmit system information to the terminal and may transmit a synchronization signal or a reference signal. To this end, the transceiver 1210 may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. However, this is only an example of the transceiver 1210, and the components of the transceiver 1210 are not limited to the RF transmitter and RF receiver. The transceiver 1210 may include a wired or wireless transceiver and may include various components for transmitting and receiving signals. Additionally, the transceiver 1210 may receive a signal through a communication channel (eg, a wireless channel) and output it to the control unit 1220, and transmit the signal output from the control unit 1220 through the communication channel. Additionally, the transceiver unit 1210 may receive a communication signal, output it to a processor, and transmit the signal output from the processor to a terminal, another base station, or another entity through a wired or wireless network.

The storage unit 1230 can store programs and data necessary for the operation of the base station. Additionally, the storage unit 1230 may store control information or data included in signals obtained from the base station. The storage unit 1230 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, the storage unit 1230 may store at least one of information transmitted and received through the transmitting and receiving unit 1210 and information generated through the control unit 1220.

In the present disclosure, the control unit 1220 may be defined as a circuit or an application-specific integrated circuit or at least one processor. The processor may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. The control unit 1220 can control the overall operation of the base station according to the embodiment proposed in this disclosure. For example, the control unit 1220 can control signal flow between each block to perform operations according to the flowchart described above.

Referring to FIG. 13, the terminal may include a transceiver 1310, a control unit 1320, and a storage unit 1330. The transmitting and receiving unit 1310, the control unit 1320, and the storage unit 1330 may operate according to the communication method of the terminal described above. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more or fewer components than the aforementioned components. In addition, the transmitting and receiving unit 1310, the control unit 1320, and the storage unit 1330 may be implemented in the form of a single chip.

The transmitting and receiving unit 1310 is a general term for the terminal's receiving unit and the terminal's transmitting unit, and can transmit and receive signals with a base station, other terminals, or network entities. Signals transmitted and received from the base station may include control information and data. For example, the transceiver 1310 may receive system information from a base station and may receive a synchronization signal or a reference signal. To this end, the transceiver 1310 may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. However, this is only an example of the transceiver 1310, and the components of the transceiver 1310 are not limited to the RF transmitter and RF receiver. Additionally, the transceiver 1310 may include a wired or wireless transceiver and may include various components for transmitting and receiving signals. Additionally, the transceiver 1310 may receive a signal through a wireless channel and output it to the control unit 1320, and transmit the signal output from the control unit 1320 through a wireless channel. Additionally, the transceiver unit 1310 may receive a communication signal, output it to a processor, and transmit the signal output from the processor to a network entity through a wired or wireless network.

The storage unit 1330 can store programs and data necessary for operation of the terminal. Additionally, the memory 1330 may store control information or data included in signals obtained from the terminal. The storage unit 1330 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media.

In the present disclosure, the control unit 1320 may be defined as a circuit or an application-specific integrated circuit or at least one processor. The processor may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. The control unit 1320 can control the overall operation of the terminal according to the embodiment proposed in this disclosure. For example, the control unit 1320 can control signal flow between each block to perform operations according to the flowchart described above.

When implemented as software, a computer-readable storage medium that stores one or more programs (software modules) may be provided. One or more programs stored in a computer-readable storage medium are configured to be executable by one or more processors in an electronic device (configured for execution). One or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.

These programs (software modules, software) may include random access memory, non-volatile memory, including flash memory, read only memory (ROM), and electrically erasable programmable ROM. (electrically erasable programmable read only memory, EEPROM), magnetic disc storage device, compact disc-ROM (CD-ROM), digital versatile discs (DVDs), or other types of disk storage. It can be stored in an optical storage device or magnetic cassette. Alternatively, it may be stored in a memory consisting of a combination of some or all of these. Additionally, multiple configuration memories may be included.

In addition, the program may be distributed through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), or a storage area network (SAN), or a combination thereof. It may be stored on an attachable storage device that is accessible. This storage device can be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to the device performing an embodiment of the present disclosure.

In the specific embodiments of the present disclosure described above, elements included in the disclosure are expressed in singular or plural numbers depending on the specific embodiment presented. However, singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components, and even components expressed in plural may be composed of singular or singular. Even expressed components may be composed of plural elements.

Meanwhile, in the detailed description of the present disclosure, specific embodiments have been described, but of course, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be determined not only by the scope of the patent claims described later, but also by the scope of this patent claim and equivalents.

Claims

In a method performed by a user equipment (UE) in a wireless communication system,

Receiving, from a base station, information about a first bandwidth part (BWP) and a second BWP, and configuration information about periodic resources configured for each of the first BWP and the second BWP;

Receiving, from the base station, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP;

performing data transmission and reception based on the activated first periodic resource;

Receiving active BWP change information activating a second BWP from the base station; and

Suspending use of the activated first periodic resource set in the first BWP,

The method wherein the stopped use of the first periodic resource is resumed without receiving the first downlink control information when the first BWP is activated.
According to claim 1,

The periodic resource is at least one of a semi-persistent scheduling (SPS) resource related to downlink or a configured grant (CG) resource related to uplink.
According to claim 1,

The above method is,

Further comprising transmitting, to the base station, capability information related to periodic resource-based operations,

The capability information is an operation in which the use of the first periodic resource of the first BWP, which is stopped when the second BWP is activated, is resumed without receiving the first downlink control information when the first BWP is activated. A method, including information indicating availability.
According to clause 2,

When the periodic resource is the SPS resource, the type of the periodic resource includes a first type SPS and a second type SPS,

The SPS resource based on the first type SPS is a resource in which the use of the SPS resource set in the deactivated BWP is stopped according to BWP deactivation, and the use of the stopped SPS resource is resumed according to activation of the deactivated BWP. ,

The SPS resource based on the second type SPS is a resource in which the settings for the SPS resource set in the deactivated BWP are deleted as the BWP is deactivated,

The above method is,

The method further comprising receiving, from the base station, information indicating a change in the type of the periodic resource.
According to clause 4,

When the periodic resource is the CG resource, the type of the periodic resource includes a first type CG, a second type CG, and a third type CG,

The CG resource based on the first type CG is a resource in which use of the CG resource set in the deactivated BWP is stopped upon deactivation of the BWP, and use of the suspended CG resource is resumed upon activation of the deactivated BWP. ,

The CG resource based on the second type CG is a resource that is activated immediately without receiving the first control information upon activation of the BWP,

The CG resource based on the third type CG is a resource in which settings related to the CG resource set in the deactivated BWP are deleted as the BWP is deactivated.
According to claim 1,

The first periodic resource and the second periodic resource set in the second BWP have the same group index,

When the first downlink control information includes the same group index, the second periodic resource is activated together with the first periodic resource based on the same group index,

The second periodic resource is suspended immediately upon activation, and the suspended second periodic resource is resumed without receiving the first downlink control information when the second BWP is activated.
According to claim 1,

The first BWP is included in a first cell, and the third BWP for which a third periodic resource is set is included in a second cell different from the first cell and is activated,

The first periodic resource and the third periodic resource have the same group index, and a priority is set between the first periodic resource and the third periodic resource,

When the first downlink control information includes the same group index, the third periodic resource is activated together with the first periodic resource based on the same group index,

The step of performing the data transmission and reception is,

When the priority of the first periodic resource is higher than the priority of the second periodic resource, when the first BWP of the first cell is deactivated, based on the third periodic resource of the second cell A method that is performed by:
In a method performed by a base station in a wireless communication system,

Transmitting, to the terminal, information about a first bandwidth part (BWP) and a second BWP, and configuration information about periodic resources configured for each of the first BWP and the second BWP;

Transmitting, to the terminal, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP;

performing data transmission and reception based on the activated first periodic resource;

Transmitting active BWP change information activating a second BWP to the terminal; and

Suspending use of the activated first periodic resource set in the first BWP,

The method wherein the stopped use of the first periodic resource is resumed without transmission of the first downlink control information when the first BWP is activated.
According to clause 8,

The periodic resource is at least one of a semi-persistent scheduling (SPS) resource related to downlink or a configured grant (CG) resource related to uplink.
According to clause 8,

The above method is,

Further comprising transmitting, to the base station, capability information related to periodic resource-based operations,

The capability information is an operation in which the use of the first periodic resource of the first BWP, which is stopped when the second BWP is activated, is resumed without receiving the first downlink control information when the first BWP is activated. A method, including information indicating availability.
According to clause 9,

When the periodic resource is the SPS resource, the type of the periodic resource includes a first type SPS and a second type SPS,

The SPS resource based on the first type SPS is a resource in which the use of the SPS resource set in the deactivated BWP is stopped according to BWP deactivation, and the use of the stopped SPS resource is resumed according to activation of the deactivated BWP. ,

The SPS resource based on the second type SPS is a resource in which the settings for the SPS resource set in the deactivated BWP are deleted as the BWP is deactivated,

The above method is,

The method further comprising transmitting, to the terminal, information indicating a change in the type of the periodic resource.
According to claim 11,

When the periodic resource is the CG resource, the type of the periodic resource includes a first type CG, a second type CG, and a third type CG,

The CG resource based on the first type CG is a resource in which use of the CG resource set in the deactivated BWP is stopped upon deactivation of the BWP, and use of the suspended CG resource is resumed upon activation of the deactivated BWP. ,

The CG resource based on the second type CG is a resource that is activated immediately without receiving the first control information upon activation of the BWP,

The CG resource based on the third type CG is a resource in which settings related to the CG resource set in the deactivated BWP are deleted as the BWP is deactivated.
According to clause 8,

The first periodic resource and the second periodic resource set in the second BWP have the same group index,

When the first downlink control information includes the same group index, the second periodic resource is activated together with the first periodic resource based on the same group index,

The second periodic resource is suspended immediately upon activation, and the suspended second periodic resource is resumed without receiving the first downlink control information when the second BWP is activated.
In a terminal (user equipment, UE) in a wireless communication system, the terminal:

transceiver;

Including a controller connected to the transceiver,

The controller is,

Receiving, from a base station, information about a first bandwidth part (BWP) and a second BWP, and configuration information about periodic resources configured for each of the first BWP and the second BWP;

Receiving, from the base station, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP;

performing data transmission and reception based on the activated first periodic resource;

Receiving active BWP change information activating a second BWP from the base station; and

Performing a step of suspending the use of the activated first periodic resource set in the first BWP,

The terminal is configured to resume the stopped use of the first periodic resource without receiving the first downlink control information when the first BWP is activated.
In a base station in a wireless communication system, the base station:

transceiver;

Including a controller connected to the transceiver,

The controller is,

Transmitting, to the terminal, information about a first bandwidth part (BWP) and a second BWP, and configuration information about periodic resources configured for each of the first BWP and the second BWP;

Transmitting, to the terminal, first downlink control information for activating a first periodic resource set in the first BWP, which is an active BWP;

performing data transmission and reception based on the activated first periodic resource;

Transmitting active BWP change information activating a second BWP to the terminal; and

Performing a step of suspending the use of the activated first periodic resource set in the first BWP,

The base station is configured to resume the stopped use of the first periodic resource without transmitting the first downlink control information when the first BWP is activated.