Method and apparatus for transmitting and receiving data using cooperative communication in a wireless communication system

Abstract

The present invention provides a 5G or pre-5G communication system for supporting a higher data transmission rate after 4G (4th generation) communication systems such as LTE. The present invention relates to "inter cell" cooperative transmission via "multi-TRP" in a wireless or communication system, and a method of operating a terminal includes receiving configuration information related to "multi-TRP", checking whether inter-cell "multi-TRP" transmission is set based on the configuration information, and if inter-cell "multi-TRP" transmission is set, checking a CORESET for the "multi-TRP" based on the configuration information, receiving downlink control information (DCI) for the "multi-TRP" via the CORESET, and receiving data from the "multi-TRP" based on the DCI.

Description

[Technical field]

[0001] The present invention relates to a wireless communication system, for example, This relates to cooperative inter-cell communication using multiple cells. [Background technology]

[0002] In order to meet the increasing demand for wireless data traffic since the commercialization of the 4G communication system, efforts are underway to develop improved 5G or pre-5G communication systems. For these reasons, 5G communication systems or pre-5G communication systems are also called communication systems beyond 4G networks or systems after LTE systems.

[0003] To achieve high data transmission rates, 5G communication systems are considered to be implemented in ultra-high frequency (mmWave) bands (such as the 60 GHz band). In order to mitigate the path loss of propagation in the ultra-high frequency band and increase the propagation distance, beamforming, massive MIMO, FD-MIMO (Full Dimensional MIMO), array antenna, analog beam-forming, and large scale antenna technologies are being discussed in the 5G communication system. In addition, to improve the system network, technologies being developed for the 5G communication system include advanced small cells, improved small cells, cloud radio access networks (cloud RAN), ultra-dense networks, device to device communication (D2D), wireless backhaul, moving networks, cooperative communication, CoMP (Coordinated Multi-Points), and receive interference cancellation.

[0004] In addition, the 5G system includes advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), as well as advanced connection technologies such as FBMC (Filter Bank Multi Carrier), NOMA (non orthogonal multiple access), and SCMA (sparse code multiple access).

[0005] Meanwhile, the Internet is evolving from a human-centered connection network in which humans generate and consume information to an IoT (Internet of Things) network in which information is exchanged and processed between distributed components such as things. IoE (Internet of Everything) technology, which combines big data processing technology through connections to cloud servers and other devices with IoT technology, is also on the rise. To realize IoT, technological elements such as sensing technology, wired / wireless communication and network infrastructure, serving interface technology, and security technology are required, and recently technologies such as sensor networks for connecting things, Machine to Machine (M2M), and MTC (Machine Type Communication) are being researched. In an IoT environment, intelligent IT (Internet Technology) serving can be provided that collects and analyzes data generated by connected things to create new value in human life. IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart home appliances, and advanced medical services through the fusion and integration of existing IT (Information Technology) and various industries.

[0006] Accordingly, various attempts are being made to apply 5G communication systems to IoT networks. For example, 5G communication technologies such as sensor networks, machine to machine (M2M), and machine type communication (MTC) are realized using techniques such as beamforming, MIMO, and array antennas. The application of cloud radio access network (cloud RAN) as the big data processing technology mentioned above can also be said to be an example of the fusion of 5G technology and IoT technology. Summary of the Invention [Problem to be solved by the invention]

[0007] In order to increase the throughput of terminals located at cell boundaries, a new type of inter-cell cooperation technology called CoMP (coordinated multi-point) is used. CoMP is a technology that reduces inter-cell interference and increases terminal throughput at cell boundaries by allowing neighboring cells to cooperate to communicate with the same terminal, not only with the serving cell but also with other cells.

[0008] The present invention The embodiment of the present invention is In this paper, we propose various techniques for CoMP (e.g., non-coherent joint transmission (NC-JT)) based on multiple transmission reception points (hereinafter, multiple TRPs) in a frequency band of a wireless communication system (which may include, for example, an LTE frequency band and an NR frequency band). for example, A method for grouping multiple cells and a method for setting a CORESET structure that a terminal should monitor within the group of cells offer do. In addition, higher layer signaling for terminals is specifically determined according to the cell grouping method. offer do. [Means for solving the problem]

[0009] According to various exemplary embodiments of the present invention, A method for a terminal supporting a multi-transmission reception point (multi-TRP) in a wireless communication system, comprising: acquiring configuration information related to an "inter-cell multi-TRP" transmission using higher layer signaling, where the "multi-TRP" related to the "inter-cell multi-TRP" transmission includes a first TRP corresponding to a first physical cell identity (PCI) and a second TRP corresponding to a second PCI, and confirming that the "inter-cell multi-TRP" transmission is configured based on the configuration information; receiving a first downlink control information (DCI) from the first TRP via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" and a second DCI from the second TRP via a second PDCCH of a second CORESET; and receiving first data from the first TRP based on the first DCI and second data from the second TRP based on the second DCI. .

[0010] Also, according to various exemplary embodiments of the present invention, In a wireless communication system supporting multi-transmission reception point (multi-TRP), a method of a first transceiver for a serving cell includes transmitting configuration information related to an "inter-cell multi-TRP" transmission to a terminal via higher layer signaling, where the "multi-TRP" related to the "inter-cell multi-TRP" transmission includes the first transceiver corresponding to a first physical cell identity (PCI) and a second transceiver for another cell corresponding to a second PCI, the configuration information including the second PCI, transmitting first downlink control information (DCI) via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" based on the configuration information, and transmitting first data based on the first DCI. .

[0011] Also, according to various exemplary embodiments of the present invention, A terminal supporting a multi-transmission reception point (multi-TRP) in a wireless communication system, the terminal comprising: a transceiver unit; and a controller for controlling the transceiver unit, the controller acquiring configuration information related to an "inter-cell multi-TRP" transmission using higher layer signaling, the "multi-TRP" related to the "inter-cell multi-TRP" transmission including a first TRP corresponding to a first physical cell identity (PCI) and a second TRP corresponding to a second PCI, confirming that the "inter-cell multi-TRP" transmission is configured based on the configuration information, receiving a first downlink control information (DCI) from the first TRP via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" and a second DCI from the second TRP via a second PDCCH of a second CORESET, and controlling the transceiver unit to receive first data from the first TRP based on the first DCI and second data from the second TRP based on the second DCI. .

[0012] Also, according to various exemplary embodiments of the present invention, In a wireless communication system supporting multi-transmission reception point (multi-TRP), a first transceiver for a serving cell includes a transceiver unit and a controller, the controller transmits configuration information related to an "inter-cell multi-TRP" transmission to a terminal via higher layer signaling, the "multi-TRP" related to the "inter-cell multi-TRP" transmission includes the first transceiver corresponding to a first physical cell identity (PCI) and a second transceiver for another cell corresponding to a second PCI, the configuration information includes the second PCI, and the controller controls the transceiver to transmit first downlink control information (DCI) via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" based on the configuration information and to transmit first data based on the first DCI. .

[0013] In addition, various embodiments of the present invention Example ofAccording to the present invention, in a method for a terminal in a wireless communication system, the method includes the steps of receiving configuration information related to cooperative transmission from a serving cell of a base station, determining whether cooperative transmission between the serving cell and a non-serving cell is set based on the configuration information, and if the cooperative transmission is set, determining a control resource set (CORESET) for cooperative transmission based on the configuration information, receiving downlink control information (DCI) for the cooperative transmission via the CORESET, and receiving data from the serving cell and the non-serving cell based on the DCI. Effect of the Invention

[0014] The present invention Exemplary embodiments of the present invention According to the document, when performing NC-JT based on "multiple TRP", by providing a method for setting information including the cell group monitored by the terminal and at least one of BWP, CORESET, and "CORESETPool index" information, it is possible to perform "inter-cell" based "multi TRP" based operation in the same band, frequency band, etc. [Brief description of the drawings]

[0015] The above and other aspects, features and advantages of any embodiment of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Figure 1] 1 is a diagram showing the basic structure of a time-frequency domain, which is a radio resource domain in which data or control channels are transmitted, in a wireless communication system according to one embodiment of the present invention. [Diagram 2] A diagram showing the frame, subframe, and slot structure in a 5G system. [Diagram 3] 1 is a diagram for explaining settings for bandwidth portions in a wireless communication system according to an embodiment of the present invention. [Figure 4] FIG. 2 illustrates a method for dynamic reconfiguration of bandwidth portions according to an embodiment of the present invention. [Diagram 5] This is a diagram to explain a control region (Control Resource Set, CORESET) in which a downlink control channel is transmitted in a 5G system according to one embodiment of the present invention. [Figure 6] A diagram showing a procedure for reporting terminal capabilities (UE capability) according to one embodiment of the present invention. [Figure 7] FIG. 2 is a diagram for explaining a cooperative communication antenna port configuration according to an embodiment of the present invention. [Figure 8a] FIG. 1 illustrates a scenario for configuring "multi-TRP" according to an embodiment of the present invention. [Figure 8b] FIG. 1 illustrates a scenario for configuring "multi-TRP" according to an embodiment of the present invention. [Figure 8c] FIG. 1 illustrates a scenario for configuring "multi-TRP" according to an embodiment of the present invention. [Figure 8d] FIG. 1 illustrates a scenario for configuring "multi-TRP" according to an embodiment of the present invention. [Figure 9] A diagram showing a method of setting 'CORESETPoolIndex' of 'M-TRP' based on 'Multi-DCI' according to one embodiment of the present invention. [Figure 10] FIG. 1 illustrates a method for setting “CORESETPoolIndex” according to one embodiment of the present invention. [Figure 11] FIG. 1 illustrates a method for setting “CORESETPoolIndex” according to one embodiment of the present invention. [Figure 12] FIG. 1 illustrates a method for setting “CORESETPoolIndex” according to one embodiment of the present invention. [Figure 13] 4 is a flowchart illustrating an operation of a terminal according to an embodiment of the present invention. [Figure 14] 4 is a flowchart illustrating an operation of a base station according to an embodiment of the present invention. [Figure 15] FIG. 2 is a block diagram showing the structure of a terminal according to an embodiment of the present invention; [Figure 16] FIG. 2 is a block diagram showing the structure of a base station according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiments, technical details that are widely known in the technical field to which the present invention pertains and are not directly related to the present invention will not be described. This is for the purpose of more clearly conveying the gist of the present invention by omitting unnecessary explanations.

[0017] For the same reason, in the accompanying drawings, some components may be exaggerated, omitted, or illustrated diagrammatically. Additionally, the size of each component does not reflect its actual size. In the various drawings, the same or corresponding components are given the same reference numbers.

[0018] The advantages and features of the present invention, as well as the methods of achieving them, will become more apparent from the following detailed description of the embodiments taken in conjunction with the accompanying drawings. However, the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. do. Akira Like numbers refer to like elements throughout the specification.

[0019] At this time, it can be understood that each block of the process flow diagram and the combination of the diagrams in the flow diagram can be implemented by computer program instructions. These computer program instructions can be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions, executed by the processor of the computer or other programmable data processing equipment, create means for performing the functions described in the flow diagram blocks.

[0020] These computer program instructions may also be stored in a computer usable or computer readable memory that can direct a computer, or other programmable data processing equipment, to implement functions in a particular manner, such that the instructions stored in the computer usable or computer readable memory may produce an article of manufacture that contains instruction means that perform the functions described in the flow diagram blocks. The computer program instructions may also be embodied on a computer, or other programmable data processing equipment, such that a sequence of operational steps are performed on the computer, or other programmable data processing device, to generate a computer implemented process, and the instructions for running the computer, or other programmable data processing device, may provide steps for performing the functions described in the flow diagram blocks.

[0021] Furthermore, each block may represent a module, a segment, or a portion of code that includes one or more executable instructions for executing a specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of order. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in reverse order depending on the functionality involved.

[0022] In this regard, the term "unit" used in this embodiment means software or a hardware component such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC), and the "unit" performs a certain role. However, the term "part" is not intended to be limited to software or hardware. A "module" may be configured to reside on an addressable storage medium and may be configured to execute on one or more processors. Thus, in some embodiments, a "unit" includes components such as software components, object oriented software components, class components, and task components, as well as processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided in the components and units may be combined into fewer components and units or further separated into additional components and units. The components and "units" may also be embodied to execute one or more CPUs within a device or a security multimedia card. Also, in some embodiments, a "unit" may include one or more processors.

[0023] The operating principle of the present invention will be described in detail below with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of related known functions or configurations may obscure the gist of the present invention, the detailed description will be omitted. Furthermore, the terms used below are defined in consideration of the functions of the present invention, and may be changed according to the intentions or practices of users or operators. Therefore, the definition should be based on the overall content of this specification.

[0024] Hereinafter, a base station is an entity that allocates resources to terminals, and may be at least one of a "gNode B", "eNode B", "Node B", BS (Base Station), a radio access unit, a base station controller, or a node on a network. A terminal may include a User Equipment (UE), a Mobile Station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions. Of course, the present invention is not limited to the above examples.

[0025] Hereinafter, the present invention will be described with reference to a technique for a terminal to receive broadcast information from a base station in a wireless communication system. This invention is based on 4G (4 th generation system and later to support even higher data transmission rates. th This paper relates to communication techniques and systems that combine the (IoT) generation communication system with IoT (Internet of Things) technology. The present invention can be applied to intelligent serving (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, etc.) based on 5G communication technology and IoT-related technologies.

[0026] In the following description, terms indicating broadcast information, terms indicating control information, terms related to communication coverage, terms indicating state changes (e.g., events), terms indicating network entities, terms indicating messages, terms indicating device components, etc. are provided as examples for the convenience of description. Therefore, the present invention is not limited to the terms described below, and other terms having equivalent technical meanings may be used.

[0027] For ease of explanation, some of the terms and names defined in the 3GPP (registered trademark) LTE (3rd generation partnership project long term evolution) standard will be used below. However, the present invention is not limited to the above terms and names, and can be equally applied to systems conforming to other standards.

[0028] Wireless communication systems have evolved from the early days when they provided voice-centric services to broadband wireless communication systems providing high-speed, high-quality packet data services, such as communication standards such as 3GPP's High Speed ​​Packet Access (HSPA), Long Term Evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), and IEEE's 802.16e.

[0029] As a representative example of a broadband wireless communication system, the LTE system employs an OFDM (Orthogonal Frequency Division Multiplexing) scheme for the downlink (DL) and an SC-FDMA (Single Carrier Frequency Division Multiple Access) scheme for the uplink (UL). The uplink refers to a wireless link through which a terminal (User Equipment (UE) or Mobile Station (MS)) transmits data or control signals to a base station ("eNode B", or "base station" (BS)), and the downlink refers to a wireless link through which the base station transmits data or control signals to the terminal. The above-mentioned multiple access scheme separates the data or control information of each user by allocating and operating time-frequency resources for transmitting data or control information for each user so that they do not overlap with each other, i.e., so that orthogonality is established.

[0030] As a future communication system after LTE 、5 G Communication systems meet the diverse requirements of users and service providers. Reflect and support Should be possible do. 5 Services being considered for G communication systems include Enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC).

[0031] According to one embodiment, eMBB aims to provide improved data transmission rates beyond those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to provide a maximum transmission speed (peak data rate) of 20 Gbps in the downlink and a maximum transmission speed of 10 Gbps in the uplink from the perspective of one base station. At the same time, the increased user perceived data rate must be provided. Meeting these requirements calls for improved transmission and reception technologies, including improved Multiple Input Multiple Output (MIMO) transmission techniques. In addition, by using a frequency band of 3 to 6 GHz or 6 GHz or higher, instead of the 2 GHz band currently used by LTE, and with a frequency bandwidth of more than 20 MHz, the data transmission speed required by the 5G communication system can be met.

[0032] At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. In order to efficiently provide the Internet of Things, mMTC is required to support the connection of a large number of devices within a cell, improve device coverage, improve battery life, and reduce device costs. The Internet of Things provides communication functions by connecting multiple sensors and various devices, so multiple terminals (e.g., 1,000,000 terminals / km) can be connected within a cell. 2 ) must be supported. In addition, due to the characteristics of the service, terminals that support mMTC are likely to be located in shadow areas where cells cannot cover, such as underground areas of buildings, so they may require wider coverage than other services provided in 5G communication systems. Terminals that support mMTC should be low-cost terminals, and because it is difficult to frequently replace terminal batteries, they are required to have a very long battery life.

[0033] Finally, URLLC is a cellular-based wireless communication service used for mission-critical purposes, such as remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, and emergency alerts, and must provide communications with ultra-low latency and ultra-reliability. For example, a service that supports URLLC should meet the air interface latency requirement of less than 0.5 milliseconds, and at the same time has a packet error rate requirement of 10-5 or less. Therefore, for services that support URLLC, the 5G system must provide a smaller transmit time interval (TTI) than other services, and at the same time, it must allocate wider resources in the frequency band. This is a design requirement. However, the above-mentioned mMTC, URLLC, and eMBB are merely examples of different service types, and the service types to which the present invention is applicable are not limited to the above-mentioned examples.

[0034] The services considered in the 5G communication system described above must be integrated and provided based on a single framework. That is, for efficient resource management and control, it is preferable that each service be integrated, controlled, and transmitted in one system, rather than being operated independently. In addition, the following describes an embodiment of the present invention using an LTE, LTE-A, "LTE Pro", or NR system as an example, but the embodiment of the present invention may also be applied to other communication systems having similar technical backgrounds or channel configurations. Furthermore, the embodiments of the present invention may be applied to other communication systems through some modifications based on the judgment of a person skilled in the art without departing from the scope of the present invention.

[0035] In the following description, terms indicating broadcast information, terms indicating control information, terms related to communication coverage, terms indicating state changes (e.g., events), terms indicating network entities, terms indicating messages, terms indicating device components, etc. are provided as examples for the convenience of description. Therefore, the present invention is not limited to the terms described below, and other terms having equivalent technical meanings may also be used.

[0036] For ease of explanation, some of the terms and names defined in the 3GPP (registered trademark) LTE (3rd generation partnership project long term evolution) standard will be used below. However, the present invention is not limited to the above terms and names, and can be equally applied to systems conforming to other standards.

[0037] FIG. 1 is a diagram showing the basic structure of a time-frequency domain, which is a radio resource domain in which data or control channels are transmitted in a wireless communication system. Referring to FIG. 1, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The basic unit of a resource in the time and frequency domain is a resource element (RE) (1-01), which is defined as one orthogonal frequency division multiplexing (OFDM) symbol (1-02) on the time axis and one subcarrier (1-03) on the frequency axis.

[0038] In the frequency domain TIFF0007681100000001.tif12146 (for example, 12) consecutive REs constitute one resource block (RB) (1-04).

[0039] FIG. 2 is a diagram showing the frame, subframe, and slot structure in a 5G system. figure 2 shows an example of a frame (2-00), subframe (2-01), and slot (2-02) structure. One frame (2-00) is defined as 10 ms. One subframe (2-01) is defined as 1 ms, and one frame (2-00) is made up of a total of 10 subframes (2-01).

[0040] One slot (2-02, 2-03) is defined as 14 OFDM symbols (i.e., the number of symbols per slot ( TIFF0007681100000002.tif12146)=14). One subframe (2-01) can be configured with one or more slots (2-02, 2-03), and the number of slots (2-02, 2-03) per one subframe (2-01) varies depending on the set value μ (2-04, 2-05) for the subcarrier spacing.

[0041] In the example of FIG. 2, the subcarrier spacing is set to μ=0 (2-04) and μ=1 (2-05). When μ=0 (2-04), one subframe (2-01) is composed of one slot (2-02), and when μ=1 (2-05), one subframe (2-01) is composed of two slots (2-03).

[0042] That is, the number of slots per subframe ( TIFF0007681100000003.tif12146) can be changed, which will result in the number of slots per frame ( TIFF0007681100000004.tif12146) will be changed. By setting each subcarrier interval μ TIFF0007681100000005.tif12146 and TIFF0007681100000006.tif12146 is defined as shown in Table 1 below.

[0043] [Table 1]

[0044] In NR, one component carrier (CC) or serving cell consists of up to 250 or more RBs. Therefore, if a terminal always receives the entire serving cell bandwidth as in LTE, the terminal's power consumption may become serious. To solve this, the base station configures one or more bandwidth parts (BWPs) for the terminal and supports the terminal to change the reception area within a cell.

[0045] In NR, the base station sets the "initial BWP", which is the bandwidth of CORESET#0 (or common search space, CSS), to the terminal via the MIB. Thereafter, the base station configures an initial BWP for the terminal via RRC signaling, and notifies at least one or more pieces of BWP configuration information that may be indicated in the future via downlink control information (DCI). The base station then announces the "BWP ID" via DCI to indicate which band the terminal is to use. If the terminal is unable to receive DCI in the currently assigned BWP for a certain period of time, the terminal returns to the "default BWP" and attempts to receive DCI.

[0046] FIG. 3 is a diagram for explaining settings for bandwidth portions in a wireless communication system according to an embodiment of the present invention. Referring to FIG. 3, the bandwidth (3-00) of the terminal includes two bandwidth portions, namely, bandwidth portion #1 (3-01) and bandwidth portion #2 (3-02).

[0047] The base station may configure one or more bandwidth portions for the terminal, and configures information such as that shown in Table 2 below for each bandwidth portion. [Table 2]

[0048] In addition to the setting information described in Table 2, various parameters related to the bandwidth are set in the terminal. The above information is transmitted from the base station to the terminal via higher layer signaling, for example, RRC signaling. At least one bandwidth portion out of the one or more bandwidth portions set is activated. The activation or non-activation of the configured bandwidth portion is transmitted from the base station to the terminal semi-statically via RRC signaling, or dynamically via a MAC control element (CE) or DCI.

[0049] The settings for the bandwidth portions supported in the above-mentioned 5G communication system are used for various purposes. As an example, when the bandwidth supported by the terminal is smaller than the system bandwidth, the bandwidth supported by the terminal is supported through the setting for the bandwidth portion. For example, in Table 2, the frequency position of the bandwidth portion (setting information 2) is set in the terminal, so that the terminal can transmit and receive data at a specific frequency position within the system bandwidth.

[0050] As another example, a base station may configure multiple bandwidth portions for a terminal in order to support different numerologies. For example, to support all data transmissions and receptions using 15 kHz subcarrier spacing and 30 kHz subcarrier spacing at any terminal, two bandwidth portions are configured to use subcarrier spacings of 15 kHz and 30 kHz, respectively. The different bandwidth portions are frequency division multiplexed (FDM), and when data is to be transmitted or received at a specific subcarrier interval, the bandwidth portion set for the corresponding subcarrier interval is activated.

[0051] As another example, in order to reduce power consumption of a terminal, a base station may set bandwidth portions having different bandwidth sizes to the terminal. For example, if a terminal supports a very large bandwidth, e.g., a bandwidth of 100 MHz, and constantly transmits and receives data in that bandwidth, this may result in very large power consumption. In particular, when there is no traffic, it is very inefficient in terms of power consumption for a terminal to monitor an unnecessary downlink control channel for a large bandwidth of 100 MHz. Therefore, in order to reduce the power consumption of the terminal, the base station sets a bandwidth portion of a relatively small bandwidth to the terminal, for example, a bandwidth portion of 20 MHz. When there is no traffic, the terminal performs monitoring operation in the 20 MHz bandwidth and data Existing at or for a terminal In this case, data is transmitted and received using the 100 MHz bandwidth portion as instructed by the base station.

[0052] FIG. 4 is a diagram illustrating a method for dynamically changing bandwidth portions according to an embodiment of the present invention. Referring to Figure 4, as described in Table 2 above, the base station can configure one or more bandwidth parts for the terminal, and in the configuration for each bandwidth part, can inform the terminal of information regarding the bandwidth of the bandwidth part, the frequency position of the bandwidth part, the numerology of the bandwidth part, etc. According to FIG. 4, two bandwidth portions within the terminal's bandwidth (4-00), namely, bandwidth portion #1 (BWP#1) (4-05) and bandwidth portion #2 (BWP#2) (4-10), are set for the terminal. Within the set bandwidth, one or more bandwidth portions may be activated, and in FIG. 4 an example is considered in which one bandwidth portion is activated. In slot #0 (4-25), bandwidth portion #1 (4-05) of the set bandwidth portions is active, and the terminal monitors the PDCCH (Physical Downlink Control Channel) in control region #1 (4-45) set in bandwidth portion #1 (4-05) and transmits and receives data (4-55) in bandwidth portion #1 (4-05). Depending on which bandwidth portion among the configured bandwidth portions is activated, the control region in which the terminal receives the PDCCH differs, and thus the bandwidth in which the terminal monitors the PDCCH changes.

[0053] The base station additionally transmits to the terminal an indicator for changing the setting for the bandwidth portion. Here, changing the settings for a bandwidth portion can be considered the same as activating a particular bandwidth portion (eg, changing activation from bandwidth portion A to bandwidth portion B). The base station transmits a configuration switching indicator to the terminal in a specific slot. After receiving the configuration change indicator from the base station, the terminal applies the configuration changed according to the configuration change indicator from a specific time point and determines a bandwidth portion to be activated. In addition, the terminal monitors the PDCCH in a control region set in the activated bandwidth portion.

[0054] In FIG. 4, the base station transmits a configuration switching indication (4-15) in slot #1 (4-30) to instruct the terminal to change the activated bandwidth portion from the existing bandwidth portion #1 (4-05) to bandwidth portion #2 (4-10). After receiving the corresponding indicator, the terminal activates the bandwidth portion #2 (4-10) according to the contents of the indicator. At this time, a transition time (4-20) for changing the bandwidth portion is calculated, and the time when the activated bandwidth portion is changed and applied is determined. FIG. 4 shows a case where a transition time of one slot (4-20) is required after receiving a setting change indicator (4-15). During the transition time (4-20), there may be cases where no data is transmitted or received (4-60). Accordingly, the bandwidth portion #2 (4-10) is activated in slot #2 (4-35) and slot #3 (4-40), and the control channel and data are transmitted and received in the corresponding bandwidth portion.

[0055] The base station can pre-configure one or more bandwidth portions for the terminal through higher layer signaling (e.g., RRC signaling), and instructs activation in a manner such that the configuration change indicator (4-15) is mapped to one of the bandwidth portion configurations pre-configured by the base station. For example, log 2 The N-bit indicator selects and indicates one of N predefined bandwidth portions.

[0056] Table 3 below illustrates an example of indicating configuration information for a bandwidth portion using a 2-bit indicator. [Table 3]

[0057] The configuration change indicator (4-15) for the bandwidth portion described in FIG. 4 is transmitted from the base station to the terminal in the form of MAC (Medium Access Control) CE (Control Element) signaling or L1 signaling (e.g., common DCI, group-common DCI, terminal-specific DCI).

[0058] According to the setting change indicator (4-15) for the bandwidth portion described in FIG. 4, the time point from which the activation of the bandwidth portion is applied is as follows. The point in time from which the configuration change is applied may be determined according to a predefined value (e.g., applied N (≧1) slots after the configuration change indicator is received), may be set from the base station to the terminal via higher layer signaling (e.g., RRC signaling), or may be included as part of the contents of the configuration change indicator (4-15) and transmitted. Alternatively, the time at which the configuration changes are applied may be determined using a combination of the above methods. After receiving the setting change indicator (4-15) for the bandwidth portion, the terminal applies the changed setting from the point obtained in the manner described above.

[0059] FIG. 5 is a diagram illustrating a control region (Control Resource Set, CORESET) in which a downlink control channel is transmitted in a 5G system in one embodiment of the present invention. Referring to Figure 5 , Zhou The terminal bandwidth portion (5-10) is set on the wavenumber axis, and two control regions (control region #1 (5-01) and control region #2 (5-02)) are set within one slot (5-20) on the time axis.

[0060] The control regions (5-01, 5-02) are set to specific frequency resources (5-03) within the entire terminal bandwidth portion (5-10) on the frequency axis. The control region (5-01, 5-02) can be set to one or more OFDM symbols on the time axis, and can be defined by the control region length (Control Resource Set Duration) (5-04). In the example of FIG. 5, control region #1 (5-01) is set to a length of two symbols, and control region #2 (5-02) is set to a length of one symbol.

[0061] The control area in the 5G system described above is set by the base station to the terminal via higher layer signaling (e.g., system information, MIB (Master Information Block), and RRC (Radio Resource Control) signaling). Setting a control region in a terminal means providing the terminal with information such as a control region identity, the frequency location of the control region, and the symbol length of the control region.

[0062] For example, the information for setting a control area in a terminal includes information according to Table (4-1) shown below. [Table (4-1)]

[0063] In Table (4-1), the tci-StatesPDCCH (simply referred to as TCI state) configuration information may include information on one or more SS (synchronization signal) / PBCH (physical broadcast channel) block (block) (indicated as SSB or SS / PBCH block) indexes or CSI-RS (channel state information reference signal) indexes that are in a QCL (quasi co-located) relationship with the DMRS (demodulation reference signal) transmitted in the corresponding control region.

[0064] In a wireless communication system, one or more different antenna ports Alternatively, One or more channels, signals, and combinations thereof It's okay to have it, but Future Illustrative Description of the InventionSo for convenience These are commonly referred to as Associate with each other by QCL setting as shown in table (4-2) below. These are commonly referred to as 'different antenna ports'. . [Table (4-2)]

[0065] Specifically, the QCL configuration connects two different antenna ports to a (QCL) target antenna port and a (QCL) reference antenna port, and the terminal applies (or assumes) all or part of the statistical characteristics of the channel measured at the reference antenna port (e.g., Doppler shift, Doppler spread, average delay, delay spread, average gain, spatial Rx (or Tx) parameters, etc., the channel's "large scale" parameters, or the terminal's receive spatial filter coefficients or transmit spatial filter coefficients) when receiving at the target antenna port.

[0066] A target antenna port means an antenna port that transmits a channel or signal that is set by a higher layer setting including a QCL setting, or an antenna port that transmits a channel or signal to which a "TCI state" indicating a QCL setting is applied. The reference antenna port refers to the antenna port that transmits the channel or signal indicated (specified) by the "referenceSignal" parameter in the QCL setting.

[0067] Specifically, the statistical properties of the channel defined by the QCL configuration (indicated within the QCL configuration by the parameter “qcl-Type”) can be classified according to the “QCL ​​type” as follows:

[0068] o'QCL-TypeA':{Doppler shift,Doppler spread,average delay,delay spread} o'QCL-TypeB':{Doppler shift,Doppler spread} o'QCL-TypeC':{Doppler shift, average delay} o'QCL-TypeD':{Spatial Rx parameter} 「 The types of "QCL type" are not limited to the above four types. But, Do not list all possible combinations.

[0069] QCL-Type A is a "QCL type" used when the bandwidth and transmission duration of the target antenna port are both sufficient compared to the reference antenna port (i.e., the number of samples and transmission bandwidth / time of the target antenna port are greater than the number of samples and transmission bandwidth / time of the reference antenna port on both the frequency axis and the time axis) and all statistical characteristics measurable on the frequency and time axes can be referenced.

[0070] QCL-TypeB is a "QCL type" used when the bandwidth of the target antenna port is sufficient to measure statistical characteristics measurable on the frequency axis, i.e., "Doppler shift" and "Doppler spread".

[0071] QCL-TypeC is a "QCL type" used when the bandwidth and transmission duration of the target antenna port are insufficient to measure "second-order statistics", i.e., "Doppler spread" and "delay spread", and only "first-order statistics", i.e., "Doppler shift" and "average delay", can be referenced.

[0072] QCL-TypeD is a "QCL type" that is set when the spatial receive filter value used when receiving from the reference antenna port can be used when receiving from the target antenna port.

[0073] On the other hand, the base station can set or instruct up to two QCL settings to one target antenna port via the “TCI state” setting as shown in Table (4-3) below. [Table (4-3)]

[0074] The first of the two QCL settings included in one “TCI state” setting can be set to one of QCL-TypeA, QCL-TypeB, or QCL-TypeC. At this time, the configurable 'QCL type' is determined by the types of the target antenna port and the reference antenna port, which will be described in detail below. In addition, the second of the two QCL settings included in the above-mentioned one "TCI state" setting may be set to QCL-Type D and may be omitted in some cases.

[0075] FIG. 6 is a diagram illustrating a procedure for reporting UE capabilities according to an embodiment of the present invention. In LTE and NR systems, a terminal performs a procedure for reporting capabilities supported by the terminal to a serving base station while connected to the serving base station. Hereinafter, this will be referred to as a "UE capability" report.

[0076] In step 601, the base station transmits a “UE capability enquiry” message to the connected terminal requesting a capability report. The "UE capability enquiry" message may include a "UE capability" request for each "RAT type." The request for each "RAT type" may include the requested frequency band information.

[0077] In addition, the "UE capability enquiry" message may include multiple "RAT types" in one RRC message container. Or, according to another example, a 'UE capability enquiry' message including a request for each 'RAT type' is transmitted to the UE multiple times. That is, the "UE capability enquiry" message is repeatedly transmitted multiple times, and the terminal configures and reports a corresponding "UE capability information" message.

[0078] In the NR system, the base station requests "UE capability" for MR-DC, including NR, LTE, and EN-DC. After the terminal is connected, the base station sends a "UE capability enquiry" message and can also request a "UE capability" report under any conditions when necessary. Upon receiving a "UE capability" report request from the base station, the terminal configures or acquires the "UE capability" based on the "RAT type" and band information included in the "UE capability enquiry" message.

[0079] Meanwhile, according to one embodiment of the present invention, 'UE Capability' includes information on whether the terminal supports 'multi-TRP' operation. In addition, 'UE Capability' includes information on whether the terminal supports 'multi-TRP' operation for 'inter-cell'. Therefore, the "UE capability" can be referred to as a "multi-TRP" related capability. After the 'UE capability' is configured, the terminal transmits a 'UE capability information' message including the 'UE capability' to the base station in step 602. Thereafter, the base station performs appropriate scheduling and transmission / reception management for the terminal based on the "UE capability" received from the terminal.

[0080] FIG. 7 is a diagram for explaining a cooperative communication antenna port configuration according to an embodiment of the present invention. Referring to FIG. 7, an example of a joint transmission (JT) technique and radio resource allocation for each transmission reception point (TRP) according to a situation is shown.

[0081] In FIG. 7, 700 is a diagram illustrating coherent joint transmission (C-JT) supporting each cell, TRP and / or inter-beam coherent precoding. In the case of C-JT, "TRP A" 705 and "TRP B" 710 transmit the same data (PDSCH) to each other, and joint precoding is performed by multiple TRPs. This means that the same DMRS port (eg, DMRS port A, B) will be transmitted on "TRP A" 705 and "TRP B" 710. In this case, the terminal 715 receives one piece of DCI information for receiving one PDSCH demodulated by the reference signal received via "DMRS port A, B".

[0082] In FIG. 7, 720 illustrates non-coherent joint transmission (NC-JT) supporting each cell, TRP and / or inter-beam non-coherent precoding. In the case of NC-JT, a different PDSCH is transmitted in each cell, TRP and / or beam, and individual precoding is applied to each PDSCH. This means that different DMRS ports (e.g., DMRS port A for TRP A and DMRS port B for TRP B) will be transmitted on "TRP A" 725 and "TRP B" 730. In this case, the terminal 735 receives two types of DCI information for receiving "PDSCH A" demodulated by "DMRS port A" and "PDSCH B" demodulated by another "DMRS port B".

[0083] In order to support NC-JT, which transmits data simultaneously from two or more transmission points to one terminal, it is necessary to allocate PDSCHs transmitted from two (or more) different transmission points via a single PDCCH, or to allocate PDSCHs transmitted from two or more different transmission points via a multiple PDCCH. The terminal obtains the quasi co-location (QCL) connection relationship between each reference signal or channel based on L1 / L2 / L3 signaling, and thereby can efficiently estimate the large scale parameters of each reference signal or channel. If the transmission points of the reference signals or channels are different, the large scale parameters are unlikely to be shared with each other, so when performing cooperative transmission, the base station needs to simultaneously inform the terminal of "quasi co-location" information for two or more transmission points via two or more "TCI states."

[0084] If non-coherent cooperative transmission is supported via multiple PDCCHs, i.e., if two or more PDCCHs assign two or more PDSCHs to the same serving cell and the same bandwidth portion at the same time, two or more "TCI states" are assigned to each PDSCH or "DMRS port" via each PDCCH, respectively. On the other hand, when non-coherent cooperative transmission is supported via a single PDCCH, i.e., when one PDCCH allocates two or more PDSCHs to the same serving cell and the same bandwidth portion at the same time, the two or more "TCI states" are allocated to each PDSCH or "DMRS port" via one PDCCH.

[0085] If it is assumed that the 'DMRS port' assigned to the terminal at a particular time point is divided into 'DMRS port group A' transmitted from transmission point A and 'DMRS port group B' transmitted from transmission point B, two or more 'TCI states' are each connected to a 'DMRS port group', and a channel is estimated based on a different QCL assumption for each group. Meanwhile, different DMRS ports are code division multiplexed (CDM), frequency division multiplexed (FDM), or time domain multiplexed (TDM) in order to increase the accuracy of channel measurement and reduce the transmission burden. Among these, when the 'DMRS ports' that are CDMed are commonly referred to as a 'CDM group,' code-based multiplexing works well when the channel characteristics of each 'DMRS port' within a 'CDM group' are similar (i.e., when the channel characteristics of each port are similar, distinction based on OCC (orthogonal cover code) can be made well), so it is important that 'DMRS ports' that exist in the same 'CDM group' do not have different 'TCI states' from each other.

[0086] On the other hand, the operation of transmitting data via multiple TRPs as described above is called "multi-TRP" (M-TRP) operation. In addition, the operation of transmitting data via multiple cells using multiple TRPs is referred to as "inter cell multi-TRP" operation. In the present invention, a method for "inter cell multi TRP" operation is proposed.

[0087] For "inter-cell multi-TRP" (M-TRP) operation, a method for configuring "inter-cell" is required. For example, an "inter-cell" is configured via "inter-cell" configuration information, and the "inter-cell" configuration information includes at least one of information such as a unit and method for configuring an "inter-cell", a unit and method for grouping cells, and information for identifying a cell (e.g., "cell id", "serving cell id"). However, embodiments of the present invention are not limited to this, and the "inter-cell" setting information may not include the above-mentioned information, and may include any information related to "inter-cell". In addition, SSB pattern (ssb-PositionsInBurst, ssb-periodicityServingCell), sub-carrier spacing (subcarrier Spacing), frequency (absoluteFrequencySSB), etc. may be included.

[0088] Also, the "inter-cell" setting information 、c A term indicating cell configuration information for inter-ell cooperative transmission, and is referred to as configuration information, cell configuration information, etc. In addition, the present invention The embodiment of the present invention isThis applies to "inter-cell multi-TRP" cooperative transmission via a "serving cell" and "inter-cell multi-TRP" cooperative transmission via a "serving cell" and a "non-serving cell", etc.

[0089] 8a to 8d are diagrams illustrating a scenario for configuring a "multi-TRP" according to an embodiment of the present invention. Referring to FIG. 8a, FIG. 8a illustrates "intra-cell multi-TRP" operation 810 in which one or more TRPs operate within one serving cell configuration. According to FIG. 8a, the base station transmits settings for channels and signals transmitted in different TRPs within one serving cell setting, so that multiple TRPs operate based on one ServingCellIndex. Therefore, since there is only one ServingCellIndex, cells are configured using the same "physical cell Id". In this case, a method is required for the UE to differentiate between cells by allocating different inter-cell resources on the frequency side (e.g., frequency / channel / band) or different inter-cell resources on the time side. But in general, one Component Carrier (CC) Since it is much more resource efficient to use all the allocated resources, a method of dividing cells in the form of 'cell ID' is used rather than dividing cells by time and frequency resources during 'cell planning'.

[0090] Therefore, the present invention The embodiment of the present invention is We propose a method for configuring "inter-cell" for a new M-TRP based on new "cell ID" information or cell-related information (which may also be referred to as cooperating cell configuration information, cooperating cell-related information, etc.). That is, the present invention provides a method for setting a plurality of TRPs for inter-cell cooperative transmission to a terminal (i.e., a method for informing a terminal that a cell performing inter-cell cooperative transmission is associated with another TRP). thing ) is proposed. Meanwhile, in the following, a method using a "cell ID" will be described as an example, but the present invention is not limited to this, and methods using a "physical cell ID", "serving cell index", or other other identifiers may also be considered.

[0091] In the following, a method for configuring a cell or a group of cells is proposed. The method of configuring a cell or cell group is configured differently depending on the scenario and case. On the other hand, Figs. 8a to 8d are used for inter-gNB or intra-base station (inter-gNB) inter-cell cooperative communication. Additionally, the back-haul and front-haul of Figures 8a to 8d apply to both ideal back-haul / front-haul and non-ideal back-haul / front-haul. 8a to 8d can be applied to co-channel or different channel, and can be applied to different cell IDs or the same cell ID.

[0092] First, referring to FIG. 8c, FIG. 8c (Case 3) shows “inter-cell M-TRP” operation 830 in the CA-framework. According to FIG. 8c, the base station configures the configurations for channels and signals transmitted in different TRPs by including them in different serving cell configurations.

[0093] In other words, each TRP has an independent serving cell configuration, and the frequency band value "FrequencyInfoDL" indicated by "DownlinkConfigCommon" in each serving cell configuration indicates at least some overlapping bands. Since multiple TRPs operate based on multiple ServCellIndexes ("ServCellIndex #1", "ServCellIndex #2"), it is possible to use a separate PCI for each TRP (one PCI can be assigned per ServCellIndex). In this case, if multiple SSBs are transmitted from TRP1 and TRP2, the SSBs will have different PCI values ​​(PCI#1 or PCI#2), and the terminal will receive them separately. Specifically, the method for configuring cooperative transmission in multiple TRPs using cell configuration information is as follows.

[0094] Method 1: Referring to Table 5 below, consider a method of setting information instructing activation or deactivation of inter-cell "multi-TRP" information ("IntercellForMultiTRP") in SpCell configuration information ("SpCellConfig"). In this case, the following 'IntercellForMultiTRP' is set in a manner that indicates activation or deactivation with 1-bit information, or indicates activation when 'IntercellForMultiTRP' information is included, and indicates deactivation when 'IntercellForMultiTRP' information is not included. In this way, by using "ServCellIndex", it is possible to operate based on the "CA framework".

[0095] Therefore, the terminal determines that the SCell or SpCell in which "IntercellForMultiTRP" is set to enable (or in which "IntercellForMultiTRP" is included) is set to the "cooperating set" and cooperative transmission is to be performed. [Table 5]

[0096] above Although "SpCellConfig" has been described above as an example, the present invention is not limited to this, and is also applied in the same manner to SCell setting information ("SCellConfig").

[0097] Method 2 :Others Considering the embodiment of the present invention, a method of setting "IntercellForMultiTRP" using "ServingCellConfig" as shown in Table 6 below is considered. As described above, 'IntercellForMultiTRP' is set in a manner that indicates activation or deactivation with 1-bit information, or indicates activation when 'IntercellForMultiTRP' information is included, and indicates deactivation when 'IntercellForMultiTRP' information is not included.

[0098] Therefore, when "IntercellForMultiTRP" is set to enable in "ServingCellConfig" (or when "IntercellForMultiTRP" is included in "SavingCellConfig"), the terminal determines that the SCell or SPCell corresponding to "ServingCellConfig" performs cooperative transmission. [Table 6]

[0099] Method 3 :Others Considering the embodiment, cooperating cell related information is transmitted using higher layer signaling (RRC) for 'inter-cell' based 'Multiple TRP' transmission. The cooperating cell related information may be included in "CellGroupConfig" as shown in Table 7 below. For example, at least one of the following information is added to "CellGroupConfig": "inter-cell" group information for "multi-TRP" (hereinafter, "InterCellGroupForMultiTRP") and TRP group ID (hereinafter, "InterCellGroupForMultiTRPGroupID").

[0100] However, the embodiment of the present invention is not limited to this. That is, the cooperative cell related information may be set by being included in the above-mentioned "SpCellConfig", "SCellConfig", "ServingCellConfig", etc. [Table 7]

[0101] For example, "InterCellGroupForMultiTRP" is included in "CellGroupConfig", and "InterCellGroupForMultiTRP" is configured with "InterCellGroupForMultiTRPGroupID" and "InterCellGroupForMultiTRPSellList". Therefore, the SCells included in the "InterCellGroupForMultiTRPSCellList" are grouped by the "InterCellGroupForMultiTRPGroupID", and the SCells or SPCells are used for cooperative transmission.

[0102] At this time, referring to Table 7, at least one of 0 to 5 is selected for "InterCellGroupForMultiTRPGroupID". However, this is merely one embodiment of the present invention, and "InterCellGroupForMultiTRPGroupID" can also be set to a value of 5 or more depending on the number of TRP groups.

[0103] Or, only "InterCellGroupForMultiTRPGroupID" can be included in "CellGroupConfig". In this case, the SCells corresponding to the "SCellConfig" contained in the "CellGroupConfig" have the same "TRP Group ID". Therefore, cells or cell groups with the same TRP Group ID are used for cooperative transmission. In this way, we will use the above two methods individually or in combination to set up a "cooperating set" of the "inter-cell" based "M-TR".

[0104] Method 4 :Others Considering the embodiment of the present invention, for the transmission of 'Multiple TRP' based on 'inter-cell', cooperative cell-related information can be transmitted using higher layer signaling (RRC), and a set constituting a 'CellGroup' is defined by configuring ('physical Id #X', 'physical Id #Y') or ('servicellId #X', 'servicellId #Y') in the form of a list or table.

[0105] 「p A set of "basic cell IDs" or a set of "servingcellIDs" is configured in a "CellGroup", and the set is used for cooperative transmission. At this time, the set of "physical cell ID" or the set of "servingcellID" can be set via "SpCellConfig", "SCellConfig", "ServingCellConfig", etc. in addition to "CellGroupConfig".

[0106] figure 8d shows an example 840 of serving cell and PCI configuration according to CA operation. Referring to FIG. 8d, in a CA situation in which the frequency resources occupied by each cell are different, the base station configures a different serving cell ("ServCellConfigCommon") for each cell (i.e., the frequency band values ​​"FrequencyInfoDL" indicated by "DownlinkConfigCommon" in each serving cell configuration are different), and thereby configures a different index ("ServCellIndex") for each cell to map different PCI values.

[0107] figure 8b (Case 2) shows “inter-cell M-TRP” operation 820 in the “non-CA framework”. Figure 8b Referring to the above, configurations for channels and signals transmitted in different TRPs are included in one serving cell configuration. In this case, different TRPs have different PCIs, and if they are set to have different PCIs without a separate 'serving cell index' setting, the terminal determines that it will transmit 'inter-cell M-TRP'.

[0108] However, since the operation is based on the 'ServCellIndex', the terminal cannot check the PCI assigned to the TRP that transmits and receives signals via a 'non-serving cell'. Therefore, the terminal cannot check whether "inter-cell M-TRP" transmission is set or not. Therefore, hereinafter, a method for checking the PCI of a TRP that transmits and receives signals via a 'non-serving cell' is proposed, through which the terminal checks whether an 'inter-cell M-TRP' has been set.

[0109] Method 1: A parameter that can connect an additional PCI value other than the first PCI value mapped to the existing "ServCellIndex" is added to the TCI setting or QCL setting, and an SSB based on the additional PCI is set as the "QCL reference" antenna port.

[0110] Specifically, as shown in Table 8 below, a parameter is added to the QCL setting to refer to a PCI other than the PCI assigned to the corresponding serving cell. [Table 8]

[0111] Second method: Alternatively, a parameter is added to the TCI configuration to refer to a PCI other than the PCI assigned to the corresponding serving cell, as shown in Table 9 below. [Table 9]

[0112] Method 3: Alternatively, if you want to map different PCI values ​​to the first QCL setting (qcl-Type1) and the second QCL setting (qcl-Type2) in a TCI setting, it is also possible to add two PCIs ("physCellId1", "physCellId2") to the TCI setting as shown in Table 10 below. [Table 10]

[0113] When allocating additional PCI values ​​in the QCL setting or TCI setting, it is possible to take into account certain constraints by taking into account the mobility setting (or handover setting) values ​​of the terminal.

[0114] The base station may use a "black cell list" or a "white cell list" in the measurement configuration (eg, "MeasConfig" or "MeasObject" settings). According to Table 11 shown below, the base station configures a set of PCI value lists via the "MeasObject" setting which are connected to a "black list" ("blackCellsToAddModList") and a "white list" ("whiteCellsToAddModList") of PCI values ​​that the terminal takes into account when measuring SSB. [Table 11]

[0115] In the above example, if PCI#2 is included in the "whiteCellsToAddModList" in "MeasObjectNR" (or is not included in the "blackCellsToAddModList"), but PCI#3 is not included in the "whiteCellsToAddModList" in "MeasObjectNR" (or is included in the "blackCellsToAddModList"), the terminal confirms that PCI#2 has been set. Therefore, the terminal has an obligation to measure SSB for PCI#2, but no longer has an obligation to measure SSB for PCI#3. Therefore, the terminal may apply the "QCL reference" antenna port setting to the SSB associated with PCI#2, but may not expect the "QCL reference" antenna port setting to the SSB associated with PCI#3. In this case, "the terminal does not expect the 'QCL reference' antenna port setting" can be applied in various ways, such as "if this setting is set, the corresponding setting content is ignored", "the terminal operation for the corresponding setting is not defined and any processing is permitted", or "the base station ensures that the corresponding setting is not made".

[0116] Books According to another embodiment of the invention, in FIG. 8b, the following method is used for the UE to check whether the "inter-cell M-TRP" operation is configured. At least one BWP is configured for TRP1 and TRP2, and cell-related higher layer signaling or parameters are configured. Multiple TRP(s) are configured so that the BWP corresponding to "inter-cell M-TRP" among the BWPs supported by each TRP becomes active. Therefore, multiple BWPs become active for M-TRP transmission. For example, for "inter-cell M-TRP" transmission, "BWP-0" of TRP1 is set to be associated with "CORESET0, 1, 2, 3, 4" and "BWP-1" of TRP2 is set to be associated with "CORESET0, 1, 2, 3, 4". Also, if BWP0 of TRP1 and BWP1 of TRP2 are activated, the terminal determines that the "M-TRP" operation is set. Therefore, the terminal performs the "M-TRP" operation according to the "ControlResourceSet" setting. That is, a terminal transmits or receives signals via multiple TRPs.

[0117] On the other hand, the above-mentioned measurement setting information is used to determine whether or not "BWP-1" of TRP2 associated with a "non-serving cell" is in an activation state. "BWP-1" of TPR2 is activated by including at least a part of "BWP-1" in the "freq." information of the band contained in the measurement setting information received from the "serving cell". For example, the above measurement setting information includes frequency information (e.g., "ARFCN-ValueNR" in "freqbandindicatorNR" or "ssbFrequency"), and when the frequency information is set to include a portion of the frequency information (BWP-1) of TRP2, "BWP-1" of TRP2 becomes activation. Alternatively, the measurement setting information includes the BWP to be activated or a "BWP ID" used for "multi-TRP inter-cell" transmission, through which "multi-TRP inter-cell" transmission is performed.

[0118] In addition, the measurement setting information received from the "serving cell" includes information such as the "measurement object" ("servingCellMO") and "measurement Id" of the "serving cell". In addition, the measurement configuration information received from the "serving cell" includes "measurement objects" related to neighboring cells. The "measurement object" includes at least one of the following pieces of information: "BWP ID" and "cell ID". Therefore, the terminal can determine that BWP0 of TRP1 and BWP1 of TRP2 have been activated based on the "measurement object" and performs "M-TRP" operation. Or, the "measurement object" includes information for "CellsToAddModList", and the above information includes a "PCI list", causing BWP1 of TRP2 to be activated. Alternatively, the base station can send a "BWP ID" for performing "inter cell" cooperative transmission of "multi-TRP" to the terminal via configuration information such as QCL information ("QCL info"), or can send a "BWP ID" for BWP1 of TRP2 to the terminal.

[0119] BooksAccording to another embodiment of the invention, in FIG. 8b, the following method is used for the terminal to check whether the "inter-cell M-TRP" operation is configured. At least one BWP is set for TRP1 and TRP2, and a method for newly setting the "CORESET Index" to be set on the terminal is considered. Multiple TRP(s) may each be configured with one or more BWPs, where the same "BWP-Id" of each TRP for "inter-cell M-TRP" transmission is configured to be associated with consecutive ("consecutive number") "CORESET Index". For example, the terminal is configured so that the same "BWP-Id" is active from TRP1 and TRP2. If the maximum number of "CORESET Index" is determined to be "5", "BWP-1" of TRP1 is set to be associated with "CORESET0, 1, 2", and "BWP-1" of TRP2 is set to be associated with "CORESET3, 4". As another example, when the maximum number of “CORESET Index” is determined to be a value greater than or equal to “5” (e.g., 10), “BWP-1” of TRP1 is set to be associated with “CORESET0-4”, and “BWP-1” of TRP2 is set to be associated with “CORESET5-9”.

[0120] Also, referring to Table 12 below, 'IntercellDownlinkBWP-Id' is added as follows to set 'active BWP Id' separately. Therefore, as described above, when the BWP indicated by 'IntercellDownlinkBWP-Id' is activated, the UE performs the 'inter-cell M-TRP' operation in the corresponding BWP. When using this method, there is an advantage in that it operates in a "non-CA framework" while maintaining the current standard in which only one BWP is active in an "inter-cell" based "multi-TRP" transmission. [Table 12]

[0121] Meanwhile, hereinafter, the configuration and operation of CORESET monitored by the terminal to perform 'inter-cell' based 'multi-TRP' transmission based on the above configuration will be described. A new definition / change of "RRC parameter CORESETPoolIndex" is required for detailed configuration of CORESET.

[0122] In "Rel-16", up to five CORESETs can be configured within one BWP, and the set of CORESETs that can perform "multi-TRP transmission" is set to the same "CORESETPoolIndex". On the other hand, in "Rel-17", it is necessary to set "CORESETPoolIndex" for each of the multiple TRPs corresponding to "inter-cell". In this case, the base station can set five or more CORESETs within one BWP, can extend and use multiple existing 'CORESETPoolIndex' for 'inter-cell' based 'multi-TRP' transmission, and can use new information (e.g., 'CORESETPoolIndex-rel17' or 'CORESETPoolIndexForIntercell').

[0123] FIG. 9 is a diagram illustrating a method of setting 'CORESETPoolIndex' of 'M-TRP' based on 'Multi-DCI' according to an embodiment of the present invention. The terminal monitors multiple PDCCHs included in a CORESET in which 'CORESETPoolIndex' is set to the same value in at least one BWP and decodes DCI. The terminal can also expect to receive "fully / partially / non-overlapped PDSCHs" scheduled by the DCI.

[0124] For example, the terminal monitors "CORESET#X" 902 of TRP1 and "CORESET#Y" 903 of TRP#2, which are set to the same "CORESETPoolIndex" 901, in "slot#0" 904, respectively. Therefore, the terminal receives data from "PDSCH#2" 905 and "PDSCH#1" 906 based on the DCI received via "CORESET#X" and "CORESET#Y".

[0125] Here, even if the PCIs set in the TRPs are different from each other, the terminal determines the CORESET index consisting of "multi-TRP" only based on the set "CORESETPoolIndex". For this reason, Example of how to do this suggest. First, 'CORESETPoolIndex' is set in the terminal, and the terminal performs 'M-TRP' operation via a CORESET having the same 'CORESETPoolIndex'. For example, if "CORESETPoolIndex0" includes "CORESET1, 2" and "CORESETPoolIndex1" includes "CORESET3, 4", the terminal performs "M-TRP" operation via "CORESET1, 2" and performs "M-TRP" operation via "CORESET3, 4".

[0126] A first method for setting "CORESETPoolIndex" will be described. According to the first method of the present invention, when a "CORESETPoolIndex" is set for a "serving cell", the terminal can expect that the same "CORESETPoolIndex" is also set for an "inter-cell" ("non-serving cell"). That is, the same "CORESETPoolIndex" is applied to "inter-cell" as well. In this case, it can be determined that the 'inter-cell' ('non-serving cell') is implicitly set without a separate 'CORESETPoolIndex' setting.

[0127] For example, if "CORESETPoolIndex0" is configured to include "CORESET1, 2" and "CORESETPoolIndex1" is configured to include "CORESET3, 4" for a cell for TRP1, the terminal determines that "CORESETPoolIndex0" also includes "CORESET1, 2" and "CORESETPoolIndex1" includes "CORESET3, 4" for a cell for TRP2.

[0128] FIG. 10 is a diagram illustrating a second method for setting the "CORESETPoolIndex" according to an embodiment of the present invention. In the second method, the number of "CORESETPoolIndex" settings is fixed, and in the present invention, for example, a case where it is set to two will be described. However, the embodiment of the present invention is not limited to this, and the number of "CORESETPoolIndex" settings can be changed.

[0129] The base station sets "CORESETPoolIndex" to "0" or "1" for each PCI. At this time, there can be two or more CORESETs included in "CORESETPoolIndex0or1". According to the second method, the base station may configure at least one CORESET to be configured in a pool for the "inter-cell" "CORESETPoolIndex" setting to have the same index for each PCI. Also, according to the second method, for a TRP having the same PCI, "CORESETPoolIndex" may include at least two CORESETs, and a CORESET having the same "CORESETPoolIndex" is used for "inter-cell" cooperative transmission. For example, the base station sets "CORESET1 for TRP1" and "CORESET1 for TRP2" to "CORESETPoolIndex0" between "inter-cell" for a specific terminal.

[0130] As another example, a "CORESETPoolIndex" set in one "Intra-cell" is used to monitor the PDCCH for "multi-TRP" transmission using the same "CORESETIndex" in "inter-cell". Specifically, referring to FIG. 10, “CORESET1 for TRP1” and “CORESET2 for TRP1” are set to “CORESETPoolIndex0” 1010 for TRP1, "CORESET1 for TRP2" and "CORESET3 for TRP2" are set to "CORESETPoolIndex0" 1020 for TRP2. Therefore, "CORESETPoolIndex0" for TRP1 and TRP2 is used for PDCCH monitoring for "inter-cell" "multi-TRP" transmission.

[0131] Similarly, "CORESET3 for TRP1" and "CORESET4 for TRP1" are set to "CORESETPoolIndex1" 1011 for TRP1, "CORESET2 for TRP2" and "CORESET4 for TRP2" are set to "CORESETPoolIndex1" 1021 for TRP2. Therefore, "CORESETPoolIndex1" for TRP1 and TRP2 is used for PDCCH monitoring for "inter-cell" "multi-TRP" transmission. At this time, the terminal checks only 'CORESETPoolIndex' regardless of PCI and performs PDCCH monitoring for 'multi-TRP' transmission. In this way, the base station fixes the total number of 'CORESETPoolIndex' and sets / determines that the terminal monitors all pools having the same index.

[0132] Specifically, the information for setting the "CORESET ID" and "CORESETPoolIndex" in the second method is shown in Table 13 below. At this time, the case where there are two 'CORESETPoolIndex' will be described as an example, but the number of 'CORESETPoolIndex' can be increased, and therefore the number of bits of the corresponding information can also be increased. Meanwhile, if no separate value is set in the RRC configuration, the UE may operate assuming that 'CORESETPoolIndex' is '0'. [Table 13]

[0133] FIG. 11 is a diagram illustrating a third method for setting the "CORESETPoolIndex" according to an embodiment of the present invention. In the third method, the number of "CORESETPoolIndex" settings is fixed, and in the present invention, for example, a case where it is set to two will be described. However, the embodiment of the present invention is not limited to this, and the number of "CORESETPoolIndex" settings can be changed.

[0134] The base station sets "CORESETPoolIndex" to "0" or "1" for each PCI. At this time, "CORESETPoolIndex0or1" contains two or more CORESETs. According to the third method, the base station sets at least one CORESET to be configured in a pool for the "inter-cell" "CORESETPoolIndex" setting to have the same index for each PCI. Also, according to the third method, for "inter-cell" cooperative transmission, CORESETs having different PCIs are set to be included in one "CORESETPoolIndex."

[0135] For example, the base station sets "CORESET1 for TRP1" and "CORESET2 for TRP2" to "inter-cell" "CORESETPoolIndex0" 1110 for a specific terminal. Furthermore, the base station sets "CORESET4 for TRP1" and "CORESET3 for TRP2" in "inter-cell" "CORESETPoolIndex1" 1120. The terminal determines that the "CORESET index" that is not set in "CORESETPoolIndex" (in this drawing, "CORESET2 for TRP1", "CORESET3 for TRP2", "CORESET1 for TRP2", and "CORESET4 for TRP2") does not support "inter-cell" based "M-TRP" transmission. In this manner, the base station fixes the total number of 'CORESETPoolIndex' and sets / determines that the terminal monitors all pools having the same index.

[0136] The CORESET setting according to this embodiment is configured as shown in Table 14 below. In this case, if two "CORESETPoolIndex"s are set, the "CORESETPoolIndex-r17 field" is set to ENUMERATED{n0, n1}, and if three "CORESETPoolIndex"s are set, the "CORESETPoolIndex-r17 field" is set to ENUMERATED{n0, n1, n3}.

[0137] Alternatively, "CORESETPoolIndex" is set by distinguishing between "intra-cell" and "inter-cell". For example, the "CORESETPoolIndex-r17 field" can be set to ENUMERATED{n0, n1, n3}, where n0, n1 are used for intra-cell and n2 is used for "inter-cell".

[0138] However, this is merely one embodiment of the present invention, and the number of 'CORESETPoolIndex' can be changed, and therefore the 'CORESETPoolIndex-r17 field' can also be set to information such as n4, n5, etc. In addition, when 'CORESETPoolIndex' is set by distinguishing between 'intra-cell' and 'inter-cell', information for 'intra-cell' and information for 'inter-cell' are determined by the base station's configuration or a predetermined rule. [Table 14]

[0139] Alternatively, according to a fourth method of the present invention, "CORESETPoolIndex" is set for "intra-cell" use, and "CORESETPoolIndex" and "CORESETPoolIndexFor-IntercellId" (new parameters) are newly defined for "inter-cell".

[0140] For example, "CORESETPoolIndexForIntercellId" is set to contain a "CORESETPoolIndex" that contains the "CORESET Id" of each cell. "CORESETPoolIndexForIntercellId0" is set to include "CORESETPoolIndex0" or to include "CORESETPoolIndex0" and "CORESETPoolIndex1". As another example, the "CORESETPoolIndexForIntercellId" is set to directly include the "CORESET Id" of each cell.

[0141] The "CORESETPoolIndexForIntercellId" setting is configured as shown in Table 15 below. [Table 15]

[0142] FIG. 12 is a diagram illustrating a fifth method for setting the "CORESETPoolIndex" according to an embodiment of the present invention. The fifth method proposes a method of expanding the number of "CORESETPoolIndex" settings. At this time, the base station expands the number of Pools taking into account the entire "inter-cell" by the number of PCIs. For example, assuming that the number of CORESETs that can be included in one BWP is set to only 5, if N PCIs are set, then 2*N "CORESETPoolIndex"s are set.

[0143] For example, referring to FIG. 12, in the case of two TRPs having two PCIs, "CORESETPoolIndex0" 1210 is set to include "CORESET1 for TRP1" and "CORESET2 for TRP1", "CORESETPoolIndex1" 1220 is set to include "CORESET3 for TRP1" and "CORESET3 for TRP2", "CORESETPoolIndex2" 1230 is set to include "CORESET4 for TRP1" and "CORESET4 for TRP2", and "CORESETPoolIndex3" 1240 is set to include "CORESET1 for TRP2" and "CORESET2 for TRP2". Or, even if the "CORESET index" of TRP2 is set consecutively such as 5, 6, 7, and 8, the "CORESETPoolIndex" mapping is set similarly. Therefore, the terminal performs PDCCH monitoring for 'multi-TRP' operation according to the set 'CORESETPoolIndex'.

[0144] FIG. 13 is a flowchart illustrating the operation of a terminal according to an embodiment of the present invention. Referring to FIG. 13, the terminal reports its terminal capabilities in step S1310. As described above, the terminal receives a terminal capability report request from the base station and reports its terminal capabilities in response.

[0145] The above terminal capabilities include information on terminal capabilities for each "RAT type." In addition, the terminal capability information includes information on whether the terminal supports 'multi-TRP' operation. In addition, 'UE Capability' includes information on whether the terminal supports 'multi-TRP' operation for 'inter-cell'. However, the terminal capability information does not have to include all of the above information, and some information may be omitted and other information may be added. On the other hand, step S1310 may be omitted. That is, if the base station has received or stored the terminal capabilities in advance, it does not request a terminal capability report, and the terminal does not report its terminal capabilities.

[0146] Thereafter, the terminal receives 'multi-TRP' related setting information in step S1320. The 'multi-TRP' related setting information includes cell-related information (or cooperating cell-related information) for 'inter cell' based 'M-TRP' operation, BWP-related information, 'CORESETPoolIndex'-related information, etc. The specific contents are the same as those described above. Therefore, the above-mentioned cell setting method, BWP-related method, and "CORESETPoolIndex" setting method are applied to this embodiment.

[0147] Therefore, the terminal performs the 'inter-cell multi-TRP' operation in step S1330. Specifically, the terminal confirms that the 'inter-cell multi-TRP' operation is configured via the cell-related information. In addition, the terminal checks information on the CORESET to be monitored for multiple TRPs using the "CORESETPoolIndex" information. Therefore, the terminal monitors the PDCCH in the CORESET for the multiple TRPs and acquires DCI. Then, the terminal receives or transmits data via the PDSCH scheduled in the DCI.

[0148] FIG. 14 is a flowchart illustrating the operation of a base station according to an embodiment of the present invention. Referring to FIG. 14, the base station receives a terminal capability in step S1410. The specific details are the same as those described above, so they will not be repeated below. Also, as described above, if the base station has previously received or stored the terminal capabilities, it does not request a terminal capability report and step S1410 is omitted.

[0149] Thereafter, the base station transmits the "multi-TRP" related setting information in step S1420. The 'multi-TRP' related setting information includes cell-related information (or cooperating cell-related information) for 'inter cell' based 'M-TRP' operation, BWP-related information, 'CORESETPoolindex'-related information, etc. The specific contents are the same as those described above. Therefore, the above-mentioned cell setting method, BWP-related method, and "CORESETPoolIndex" setting method are applied to this embodiment.

[0150] Therefore, the base station performs the "inter-cell multi-TRP" operation in step S1430. Specifically, the base station indicates to the terminal that the "inter-cell multi-TRP" operation is set via the cell-related information. In addition, the base station informs the terminal of information regarding a CORESET to be monitored for multiple TRPs using the "CORESETPoolIndex" information. Therefore, the base station transmits DCI in the CORESET for multiple TRPs. Then, the terminal receives or transmits data via the PDSCH scheduled in the DCI.

[0151] FIG. 15 is a block diagram illustrating the structure of a terminal according to an embodiment of the present invention. Referring to FIG. 15, the terminal includes a transceiver unit 1510, a control unit 1520, and a storage unit 1530. In the present invention, a controller may be defined as a circuit or an application specific integrated circuit, or at least one processor.

[0152] The transceiver 1510 transmits and receives signals to and from other network entities. The transceiver unit 1510, for example, reports terminal capabilities to a base station and receives "multi-TRP" setting information from the base station.

[0153] The controller 1520 controls the overall operation of the terminal according to the embodiment proposed in the present invention. For example, the control unit 1520 controls the flow of signals between each block so as to perform the operations according to the above-mentioned flowcharts. For example, the controller 1520 receives 'multi-TRP' configuration information according to an embodiment of the present invention, and determines that 'inter-cell multi-TRP' operation is configured based on the received 'multi-TRP' configuration information. In addition, the control unit 1520 checks the "CORESETPoolIndex" according to the "multi-TRP" setting information. Therefore, the control unit 1520 monitors the CORESETs of multiple TRPs based on the "CORESETPoolIndex". In addition, the control unit 1520 transmits and receives data based on the received DCI. The specific details are the same as those described above, so they will not be repeated below.

[0154] The storage unit 1530 stores at least one of the information transmitted and received via the transmission / reception unit 1510 and the information generated via the control unit 1520 .

[0155] FIG. 16 is a diagram illustrating the structure of a base station according to an embodiment of the present invention. Referring to FIG. 16, the base station includes a transceiver unit 1610, a control unit 1620, and a storage unit 1630. In the present invention, a controller may be defined as a circuit or an application specific integrated circuit, or at least one processor.

[0156] The transceiver 1610 transmits and receives signals to and from other network entities. The transceiver unit 1610, for example, receives terminal capabilities from a terminal and transmits "multi-TRP" setting information to the terminal.

[0157] The controller 1620 controls the overall operation of the base station according to the embodiment of the present invention. For example, the control unit 1620 controls the flow of signals between each block so as to perform the operations according to the flowcharts described above. For example, the controller 1620 may transmit "multi-TRP" configuration information according to an embodiment of the present invention, and inform the terminal that "inter-cell multi-TRP" operation has been configured via the information. In addition, the control unit 1620 transmits "CORESETPoolIndex" to the terminal according to the "multi-TRP" setting information. Therefore, the control unit 1620 transmits DCI via CORESETs of multiple TRPs based on "CORESETPoolIndex". In addition, the control unit 1620 transmits and receives data via a PDSCH scheduled based on the DCI. The specific details are the same as those described above, so they will not be repeated below.

[0158] The storage unit 1630 stores at least one of information transmitted and received via the transmission / reception unit 1610 and information generated via the control unit 1620.

[0159] Therefore, according to various embodiments of the present invention, the method includes the steps of receiving configuration information related to a "multi-TRP" (transmission reception point), determining whether inter-cell "multi-TRP" transmission is configured based on the configuration information, and if inter-cell "multi-TRP" transmission is configured, determining a CORESET (control resource set) for the "multi-TRP" based on the configuration information, receiving downlink control information (DCI) for the "multi-TRP" via the CORESET, and receiving data from the "multi-TRP" based on the DCI.

[0160] In addition, according to various embodiments of the present invention, a method of a base station in a wireless communication system includes the steps of: transmitting configuration information related to a "multi-TRP" (transmission reception point); when inter-cell "multi-TRP" transmission is configured, transmitting downlink control information (DCI) for the "multi-TRP" via a CORESET (control resource set) for the "multi-TRP" based on the configuration information; and transmitting data via the "multi-TRP" based on the DCI.

[0161] In addition, according to various embodiments of the present invention, a terminal in a wireless communication system includes a transceiver unit, and a control unit that receives configuration information related to a "multi-TRP" (transmission reception point) via the transceiver unit, checks whether inter-cell "multi-TRP" transmission is set based on the configuration information, and if inter-cell "multi-TRP" transmission is set, checks a CORESET (control resource set) for the "multi-TRP" based on the configuration information, receives downlink control information (DCI) for the "multi-TRP" via the CORESET via the transceiver unit, and receives data from the "multi-TRP" based on the DCI via the transceiver unit.

[0162] In addition, according to various embodiments of the present invention, a base station in a wireless communication system includes a transceiver unit, and a control unit that transmits configuration information related to a "multi-TRP" (transmission reception point) via the transceiver unit, and when inter-cell "multi-TRP" transmission is configured, transmits downlink control information (DCI) for the "multi-TRP" via a CORESET (control resource set) for the "multi-TRP" based on the configuration information via the transceiver unit, and transmits data via the "multi-TRP" based on the DCI via the transceiver unit.

[0163] In addition, according to various embodiments of the present invention, a method for a terminal in a wireless communication system includes the steps of receiving configuration information related to cooperative transmission from a serving cell of a base station, determining whether cooperative transmission between a serving cell and a non-serving cell is set based on the configuration information, and if cooperative transmission is set, determining a control resource set (CORESET) for cooperative transmission based on the configuration information, receiving downlink control information (DCI) for the cooperative transmission via the CORESET, and receiving data from the serving cell and the non-serving cell based on the DCI.

[0164] Meanwhile, in the figures illustrating the method of the present invention, the order of description does not necessarily correspond to the order of execution, and the order may be changed or the methods may be performed in parallel. Alternatively, a drawing explaining a method of the present invention may include only some of the components, with some components omitted, within the scope of the invention not detracting from the essence of the present invention. Furthermore, the method of the present invention may be carried out by combining some or all of the contents included in each embodiment within the scope of the invention without departing from the essence of the invention. While the present invention has been illustrated and described with reference to various exemplary embodiments, it will be understood that the various exemplary embodiments are intended to be illustrative, and not limiting. It will be further understood by those skilled in the art that various changes in form and detail may be made therein without departing from the true spirit and overall scope of the present invention, including the scope of the appended claims and equivalents thereof. [Explanation of symbols]

[0165] 1510, 1610 Transmitter / Receiver 1520, 1620 Control section 1530, 1630 Storage area

Claims

1. A method for a terminal supporting multi-transmission reception point (multi-TRP) in a wireless communication system, comprising: obtaining configuration information related to an "inter-cell multi-TRP" transmission using higher layer signaling; Here, the "multi-TRP" associated with the "inter-cell multi-TRP" transmission includes a first TRP corresponding to a first physical cell identity (PCI) and a second TRP corresponding to a second PCI; determining whether the "inter-cell multi-TRP" transmission is set based on the setting information; receiving a first downlink control information (DCI) via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" from the first TRP and a second DCI via a second PDCCH of a second CORESET from the second TRP; receiving first data from the first TRP based on the first DCI and second data from the second TRP based on the second DCI.

2. The method further includes a step of confirming a first "CORESET pool index" and a second "CORESET pool index" included in the setting information, The first CORESET corresponds to the first "CORESET pool index", The method of claim 1 , wherein the second CORESET corresponds to the second "CORESET pool index."

3. The method according to claim 1, further comprising the step of obtaining "transmission configuration indication (TCI)" configuration information including the second PCI based on the configuration information.

4. The first "CORESET pool index" is associated with the first PCI of a serving cell associated with the first TRP; 3. The method of claim 2, wherein the second "CORESET pool index" is associated with the second PCI associated with the second TRP.

5. The first "CORESET pool index" is associated with the first PCI associated with the first TRP; 3. The method of claim 2, wherein the second "CORESET pool index" is associated with the second PCI associated with the second TRP.

6. Receiving a request for terminal capability information; 2. The method of claim 1, further comprising: transmitting terminal capability information including information related to the fact that the 'inter-cell multi-TRP' transmission is supported.

7. In a wireless communication system supporting multi-transmission reception point (multi-TRP), a method of a first transceiver device for a serving cell, comprising: transmitting configuration information related to an 'inter-cell multi-TRP' transmission to a terminal via higher layer signaling; Here, the "multi-TRP" associated with the "inter-cell multi-TRP" transmission includes the first transceiver corresponding to a first physical cell identity (PCI) and a second transceiver for another cell corresponding to a second PCI, and the configuration information includes the second PCI; transmitting first downlink control information (DCI) over a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" based on the configuration information; and transmitting first data based on the first DCI.

8. The method according to claim 7, characterized in that when the setting information includes a first "CORESET pool index" and a second "CORESET pool index", the first CORESET corresponds to the first "CORESET pool index" and the second CORESET corresponds to the second "CORESET pool index".

9. The first "CORESET pool index" is associated with the first PCI of a serving cell associated with the first transceiver; 9. The method of claim 8, wherein the second "CORESET pool index" is associated with the second PCI associated with the second transceiver device.

10. The first "CORESET pool index" is associated with the first PCI associated with the first transceiver device; 9. The method of claim 8, wherein the second "CORESET pool index" is associated with the second PCI associated with the second transceiver device.

11. A step of transmitting a terminal capability information request; 8. The method of claim 7, further comprising: receiving terminal capability information including information related to whether the 'inter-cell multi-TRP' transmission is supported.

12. In a wireless communication system, a terminal supporting multi-transmission reception point (multi-TRP), A transmitting / receiving unit; A control unit that controls the transmission / reception unit, The control unit is Using higher layer signaling, obtain configuration information related to "inter-cell multi-TRP" transmission; Here, the "multi-TRP" associated with the "inter-cell multi-TRP" transmission includes a first TRP corresponding to a first physical cell identity (PCI) and a second TRP corresponding to a second PCI; Confirm that the "inter-cell multi-TRP" transmission is set based on the setting information; Receive a first downlink control information (DCI) via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" from the first TRP, and a second DCI via a second PDCCH of a second CORESET from the second TRP; A terminal characterized by controlling the transceiver unit to receive first data from the first TRP based on the first DCI and second data from the second TRP based on the second DCI.

13. The control unit performs control to check a first "CORESET pool index" and a second "CORESET pool index" included in the setting information, The terminal of claim 12, wherein the first CORESET corresponds to the first "CORESET pool index" and the second CORESET corresponds to the second "CORESET pool index".

14. The terminal according to claim 12, characterized in that the control unit controls to acquire "transmission configuration indication (TCI)" setting information including the second PCI based on the setting information.

15. The first "CORESET pool index" is associated with the first PCI of a serving cell associated with the first TRP; The terminal of claim 13, wherein the second "CORESET pool index" is associated with the second PCI associated with the second TRP.

16. The first "CORESET pool index" is associated with the first PCI associated with the first TRP; The terminal of claim 13, wherein the second "CORESET pool index" is associated with the second PCI associated with the second TRP.

17. The control unit: A request for terminal capability information is received; The terminal of claim 12, further comprising: controlling the transceiver unit to transmit terminal capability information including information related to the fact that the 'inter-cell multi-TRP' transmission is supported.

18. In a wireless communication system supporting multi-transmission reception point (multi-TRP), a first transceiver for a serving cell, comprising: A transmitting / receiving unit; A control unit, The control unit is Transmitting configuration information related to 'inter-cell multi-TRP' transmission to the terminal via higher layer signaling; Here, the "multi-TRP" associated with the "inter-cell multi-TRP" transmission includes the first transceiver corresponding to a first physical cell identity (PCI) and a second transceiver for another cell corresponding to a second PCI, and the configuration information includes the second PCI; Transmitting first downlink control information (DCI) via a first "physical downlink control channel (PDCCH)" of a first "control resource set (CORESET)" based on the configuration information; A first transceiver device, characterized by controlling the transceiver unit to transmit first data based on the first DCI.

19. The first transceiver according to claim 18, characterized in that when the setting information includes a first "CORESET pool index" and a second "CORESET pool index", the first CORESET corresponds to the first "CORESET pool index" and the second CORESET corresponds to the second "CORESET pool index".

20. The method of claim 1, wherein the first "CORESET pool index" is associated with the first PCI of a serving cell associated with the first transceiver; 20. The first transceiver of claim 19, wherein the second "CORESET pool index" is associated with the second PCI associated with the second transceiver.

21. The first "CORESET pool index" is associated with the first PCI associated with the first transceiver device; 20. The first transceiver of claim 19, wherein the second "CORESET pool index" is associated with the second PCI associated with the second transceiver.

22. The control unit: Send a request for device capability information; The first transceiver of claim 18, further comprising: controlling the transceiver unit to receive terminal capability information including information related to the fact that the 'inter-cell multi-TRP' transmission is supported.

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