Scheduling device and method for interference control in mobile communication system

Abstract

A scheduling device and method for interference control in a mobile communication system supporting carrier aggregation or dual or multi-connection technology in which a terminal uses multiple frequency resources simultaneously is provided. Specifically, a first base station in a wireless communication system includes a transceiver and a processor, wherein the processor is connected to the transceiver and configured to obtain resource information of a second base station sent by a second base station, determine a resource allocation mode based on the resource information of the second base station, allocate uplink (UL) resources of an LTE base station to a UL channel based on the resource allocation mode to reduce interference, and allocate uplink (UL) resources of the first base station to the UL channel based on the resource allocation mode to reduce interference.

Description

Technical Field

[0001] The present disclosure relates to a scheduling apparatus and method for interference control in a mobile communication system supporting carrier aggregation or dual or multiple connectivity technologies in which multiple frequency resources are used simultaneously. Background Art

[0002] The carrier aggregation technology is a technology for improving frequency usage efficiency from the perspective of a terminal or a base station by aggregating a plurality of component carriers located in different frequency bands and simultaneously transmitting and receiving signals using such component carriers by one terminal.

[0003] Dual connection or multi-connection (hereinafter referred to as dual / multi-connection) technology is a technology used to improve the frequency utilization efficiency from the perspective of the terminal or base station by connecting one terminal to multiple different base stations and simultaneously using frequency resources in multiple base stations located in different frequency bands to send and receive signals.

[0004] Since the technology was introduced into the 3rd Generation Partnership Project (3GPP) standard due to various technical advantages, such carrier aggregation and dual / multi-connection technology has been actively and variously studied in academia and industry.

[0005] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the invention

[0006] Technical issues

[0007] The various aspects of the present disclosure are to at least solve the above-mentioned problems and / or disadvantages, and to provide at least the advantages described below. Therefore, one aspect of the present disclosure is to provide a terminal that uses resources on different frequency bands to send and receive signals based on carrier aggregation or dual connectivity or multi-connectivity, because terminal-interference signals such as harmonic interference or intermodulation distortion (IMD) appear in the terminal's specific frequency band reception stage, so the terminal reception performance may be degraded. Therefore, a method for controlling such an intra-terminal interference signal is needed.

[0008] Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

[0009] Problem Solution

[0010] According to one aspect of the present disclosure, a first base station in a wireless communication system is provided. The first base station includes a transceiver and a controller, the controller is connected to the transceiver and is configured to control to obtain resource allocation related information of the second base station sent by the second base station, and determine a resource allocation mode based on the resource allocation related information of the second base station. The first base station is a long term evolution (LTE) base station, the second base station is a new radio (NR) base station, and the first base station and the second base station control different cell groups and can simultaneously send signals to and receive signals from a terminal. The resource allocation related information of the second base station includes at least one of information indicating resources capable of uplink (UL) transmission of the second base station and information indicating resources capable of downlink (DL) transmission of the second base station. The resource allocation mode is used to reduce interference by allowing some of the resources capable of UL allocation of the first base station to be used for UL channels and allowing some of the resources capable of DL allocation of the first base station to be used for DL ​​channels.

[0011] In addition, the controller may be configured to further control to determine the UL channel resources of the terminal to be included in the resources of the UL channel of the determined resource allocation mode when scheduling the terminal, and determine the DL channel resources of the terminal to be included in the resources of the DL channel of the determined resource allocation mode. In addition, the UL channel may include a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH), and the PUCCH and PUSCH may be located in independent resources in the time domain based on the resource allocation mode. In addition, the DL channel may include a physical downlink channel (PDCCH) and a physical downlink shared channel (PDSCH).

[0012] In addition, the resource allocation pattern may include UL transmission-related resources and DL transmission-related resources. The UL transmission-related resources may be resources for at least one of UL grant, UL data, and UL feedback information of UL data. The DL transmission-related resources may be resources for at least one of DL allocation, DL data, and UL feedback information of DL data. In addition, according to the resource allocation pattern, if there are UL grant resources, the UL data resources corresponding to the UL grant may exist based on a predetermined timing. If there are DL allocation resources, the DL data corresponding to the DL allocation and the UL feedback information of the DL data resources may exist based on a predetermined timing.

[0013] According to another aspect of the present disclosure, a second base station in a wireless communication system is provided. The second base station includes a transceiver and a controller, which is connected to the transceiver and configured to control to identify the resource allocation mode of the second base station, and send the resource allocation mode to the first base station based on the resource allocation mode to determine the relevant information. The first base station is an LTE base station, the second base station is an NR base station, and the first base station and the second base station control different cell groups and can simultaneously send signals to and receive signals from the terminal. The resource allocation mode related information may include at least one of information indicating the resources capable of UL transmission of the second base station and information indicating the resources capable of DL transmission of the second base station.

[0014] According to another aspect of the present disclosure, a base station in a wireless communication system is provided. The base station includes a transceiver and a controller, the controller is connected to the transceiver and is configured to control to obtain relevant information for resource allocation mode determination, determine the resource allocation mode based on the relevant information for resource allocation mode determination, and schedule the terminal based on the determined resource allocation mode. The resource allocation mode is a set of information indicating the time-frequency resources to which UL channels and DL channels can be allocated during a specific time interval. The resource allocation mode is used to reduce interference by allowing some of the resources that can be UL allocated to be used for UL channels and allowing some of the resources that can be DL allocated to be used for DL ​​channels.

[0015] In addition, the resource allocation pattern may include UL transmission-related resources and DL transmission-related resources. The UL transmission-related resources may be resources for at least one of UL authorization, UL data, and UL feedback information of UL data. The DL transmission-related resources may be resources for at least one of DL allocation, DL data, and UL feedback information of DL data. In addition, the controller may be configured to further control to determine the resource allocation pattern of the UL transmission-related resources of the base station based on the resource allocation pattern determination related information, and determine the resource allocation pattern of the DL transmission-related resources of the base station based on the resource allocation pattern of the UL transmission-related resources.

[0016] In addition, the controller can be configured to further control to determine the undetermined resource allocation mode of the channel and the signal based on the determined resource allocation mode of the UL transmission-related resources and the DL transmission-related resources of the base station. In addition, the controller can be configured to further control to determine whether the resource allocation restriction based on the resource allocation mode is applied to the terminal.

[0017] Beneficial effects of the present invention

[0018] The present disclosure can be applied to all terminals in a mobile communication system that supports carrier aggregation or dual / multi-connection technology in which multiple frequency resources are used simultaneously, regardless of whether the terminals support interference control functions, and the present disclosure can be flexibly implemented for various base station UL-DL configurations with relatively low complexity through exception handling of UL and DL scheduling operations of existing schedulers, and can improve the transmission and reception performance of terminals and base stations by controlling interference in the overall interference environment.

[0019] Other aspects, advantages, and salient features of the present disclosure will become apparent to those skilled in the art from the following detailed description, which, in conjunction with the accompanying drawings, discloses various embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent through the following description in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is a diagram illustrating a wireless communication system according to an embodiment of the present disclosure;

[0022] Figure 2A is a diagram illustrating an operation in which a base station determines a resource allocation mode and performs terminal scheduling;

[0023] Figure 2B is a detailed diagram showing an operation of a base station determining a resource allocation mode when a terminal first accesses a base station or when a terminal accesses a base station having a frequency configuration different from that of an existing connected base station or when a terminal accesses a base station using a changed frequency configuration because frequency configuration information of an existing connected base station is changed;

[0024] Figure 3A and Figure 3B is a flow chart illustrating a method for determining an uplink (UL) transmission-related resource allocation pattern when intermodulation distortion (IMD) interference is allowed according to an embodiment of the present disclosure;

[0025] Figure 4 is a diagram showing a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is allowed to occur according to an embodiment of the present disclosure;

[0026] Figure 5 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is allowed according to an embodiment of the present disclosure;

[0027] Figure 6 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is allowed according to an embodiment of the present disclosure;

[0028] Figure 7 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is allowed according to an embodiment of the present disclosure;

[0029] Figure 8 is a diagram for describing detailed operations of a method for determining a UL transmission-related resource allocation mode when IMD interference is not allowed according to an embodiment of the present disclosure;

[0030] Fig. 9 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is not allowed to occur according to an embodiment of the present disclosure;

[0031] Fig.10 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is not allowed to occur according to an embodiment of the present disclosure;

[0032] Fig.11 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is not allowed to occur according to an embodiment of the present disclosure;

[0033] Fig.12 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation mode when IMD interference is not allowed to occur according to an embodiment of the present disclosure;

[0034] Fig.13A is a diagram for describing detailed operations of a method for determining a downlink (DL) transmission-related resource allocation pattern based on a serving cell (or cell group) in which scheduling and resource allocation are restricted according to an embodiment of the present disclosure;

[0035] Fig. 13B is a diagram for describing detailed operations of a method for determining a DL transmission-related resource allocation pattern based on a serving cell (or cell group) in which scheduling and resource allocation are restricted according to an embodiment of the present disclosure;

[0036] Fig. 13C is a diagram for describing detailed operations of a method for determining a DL transmission-related resource allocation pattern based on a serving cell (or cell group) in which scheduling and resource allocation are restricted according to an embodiment of the present disclosure;

[0037] Fig.14 is a diagram showing a detailed example of resource allocation based on a method of determining a DL transmission-related resource allocation pattern according to an embodiment of the present disclosure;

[0038] Fig.15 is a diagram showing a detailed example of resource allocation based on a method of determining a DL transmission-related resource allocation pattern according to an embodiment of the present disclosure;

[0039] Fig.16 is a diagram showing a detailed example of resource allocation based on a method of determining a DL transmission-related resource allocation pattern according to an embodiment of the present disclosure;

[0040] Fig.17 is a diagram showing a detailed example of resource allocation based on a method of determining a DL transmission-related resource allocation pattern according to an embodiment of the present disclosure;

[0041] Fig.18 is a diagram showing a detailed example of resource allocation based on a method of determining a DL transmission-related resource allocation pattern according to an embodiment of the present disclosure;

[0042] Fig.19 is a diagram illustrating an operation of a base station when a terminal reports information on whether IMD interference occurs to the base station for the first time or if information on whether IMD interference occurs reported by the terminal to the base station is changed according to an embodiment of the present disclosure;

[0043] Fig. 20 is a block diagram of a base station apparatus according to an embodiment of the present disclosure.

[0044] Fig.21 is a block diagram of a terminal device according to an embodiment of the present disclosure.

[0045] Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures. DETAILED DESCRIPTION

[0046] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. The description includes various specific details to assist in understanding, but these details are considered to be exemplary only. Therefore, it will be appreciated by those of ordinary skill in the art that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0047] The terms and words used in the following description and claims are not limited to the written meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it should be clear to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustrative purposes only and not for the purpose of limiting the present disclosure as defined by the attached claims and their equivalents.

[0048] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0049] In addition, when describing the present disclosure, if it is considered that the subject matter of the present disclosure is unnecessarily obscure, the detailed description of the relevant known functions or configurations will be omitted. In addition, the terms to be described below have been defined by considering the functions in the present disclosure and may be different according to the intention or practice of the user, operator. Therefore, each term should be defined based on the content throughout the entire specification.

[0050] In addition, when describing the embodiments of the present disclosure in detail, the main subject matter of the present disclosure may be slightly modified and applied to other communication systems with similar technical backgrounds and channel forms without significantly departing from the scope of the present disclosure, wherein the scope of the present disclosure may be determined by technicians having technical knowledge in the corresponding technical field of the present disclosure.

[0051] By combining the embodiments described in detail with the accompanying drawings, the advantages and features of the present disclosure and the methods for achieving the advantages and features will become clearer. However, the present disclosure is not limited to the disclosed embodiments, but can be implemented in various ways. The embodiments are provided only to complete the present disclosure and allow those skilled in the art to fully understand the categories of the present disclosure. The present disclosure is limited by the categories of the claims. Throughout the drawings, the same reference numerals will be used to refer to the same or similar elements.

[0052] In the present disclosure, it should be understood that each box of the flowchart illustration and the combination of boxes in the flowchart illustration can be executed by computer program instructions. These computer program instructions can be installed on a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the instructions executed by the processor of the computer or other programmable data processing device create a device for performing the function specified in the flowchart box. These computer program instructions can also be stored in a computer-usable or computer-readable memory, wherein the computer-usable or computer-readable memory can instruct the computer or other programmable data processing device to act in a specific manner, so that the instructions stored in the computer-usable or computer-readable memory produce a product including an instruction device that implements the function specified in the flowchart box. The computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operations to be performed on the computer or other programmable device to produce a computer-executed process, so that the instructions of the executing computer or other programmable device provide operations for performing the functions described in the flowchart box.

[0053] In addition, each frame of the flowchart diagram may represent a part of a module, segment or code, which includes one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative embodiments, the functions mentioned in the frame may not occur in order. For example, two frames shown in succession can actually be performed substantially simultaneously, or the frames can sometimes be performed in reverse order, depending on the functions involved.

[0054] The term "unit" as used in the embodiments means software or hardware components, such as field programmable gate array (FPGA) or application specific integrated circuit (ASIC), and "unit" performs specific tasks. "Unit" can advantageously be configured to reside on an addressable storage medium and be configured to operate on one or more processors. Therefore, "unit" can include, for example, components (such as software components, object-oriented software components, class components and task components), processes, functions, attributes, processes, subroutines, program code segments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays and variables. The functions provided in components and "units" can be combined into fewer components and "units", or can be further divided into additional components and "units". In addition, components and "units" can be implemented as operating on one or more central processing units (CPUs) in equipment or secure multimedia cards.

[0055] The present disclosure provides a scheduling method for interference control in a mobile communication system that supports carrier aggregation or dual connection or multi-connection (hereinafter referred to as "dual / multi-connection" or "dual or multi-connection") technology in which multiple frequency resources are used simultaneously, and a device for executing the scheduling method.

[0056] Carrier aggregation (CA) technology is a technology for improving frequency utilization efficiency from the perspective of a terminal or base station by aggregating multiple component carriers and sending and receiving signals by the terminal using such component carriers at the same time. Specifically, according to the CA technology, the terminal and the base station can use multiple component carriers in the uplink (UL) and downlink (DL) to send and receive signals based on broadband. In this case, the component carriers are located in different frequency bands. In the following, UL means the communication link through which the terminal sends a signal to the base station, and DL means the communication link through which the base station sends a signal to the terminal. In this case, the number of UL component carriers and the number of DL component carriers may be different.

[0057] Dual / multiple connection technology is a technology for improving the frequency utilization efficiency from the perspective of the terminal or base station in a way that one terminal is connected to multiple different base stations and simultaneously uses frequency resources in multiple base stations located in different frequency bands to send and receive signals. The terminal may have been connected to a first base station (e.g., a base station providing services using long-term evolution (LTE) technology or fourth-generation mobile communication technology) and a second base station (e.g., a base station providing services using new radio (NR) technology or fifth-generation mobile communication technology) at the same time. In this case, the frequency resources used by the base station may be located in different frequency bands. In this case, the terminal can perform a radio resource control (RRC) connection through the first base station, can be served by functions provided in the control plane (e.g., connection management or mobility management), and can be provided with additional radio resources for sending and receiving data through the second base station. Such dual connection technology may be referred to as Evolved Universal Terrestrial Radio Access (E-UTRA)-NR Dual Connection (EN-DC). The present disclosure is not limited to such EN-DC, and may be applied to all EN-DCs and various forms of multi-connections in which the first base station uses NR technology and the second base station uses LTE technology. In addition, the present disclosure may be applied to the case of carrier aggregation. In addition, the present disclosure may be applied to a case where a first system uses a first communication technology and a second system uses a second communication technology, or a case where a first base station and a second base station are located at the same geographical location. In this case, the first communication technology and the second communication technology may be one of an LTE system and an NR system.

[0058] Since the technology was introduced into the 3rd Generation Partnership Project (3GPP) standard due to various technical advantages, such carrier aggregation and dual / multi-connection technology has been actively and variously studied in academia and industry.

[0059] The similarity between such carrier aggregation and dual / multiple connection technologies is that one terminal uses multiple frequency resources located in different frequency bands to send and receive signals at the same time. However, if one terminal uses multiple frequency resources located in different frequency bands to send and receive signals at the same time, the terminal reception performance may be degraded because, depending on the frequency combination and the terminal hardware and implementation characteristics, an intra-terminal interference signal such as harmonic interference or intermodulation distortion (IMD) appears in the terminal's specific frequency band reception stage.

[0060] In the 3GPP Release 15 standard, the Single Uplink Operation (SUO) technology has been introduced as a solution for using base station operations for IMD interference occurring in EN-DC. SUO uses a scheduling control method based on time division multiplexing (TDM) to avoid IMD interference. According to the SUO technology, the base station uses the UL-DL configuration and hybrid automatic repeat request (HARQ) subframe offset applied to the existing LTE time division duplex (TDD) system to specify the subframes in which the terminal can send UL signals in the LTE frequency division duplex (FDD) system, so that the terminal does not generate IMD interference in the LTE FDD DL signal by simultaneously sending the LTE FDD UL signal and the NR time division duplex TDD UL signal in the same subframe. The terminal can avoid IMD interference by performing LTE FDD UL signal transmission only in the specified subframe.

[0061] However, the SUO technology has limited operational limitations, wherein the SUO technology can be limitedly applied only to terminals that support the corresponding technology, and it cannot be applied to terminals that do not support the corresponding technology. In addition, in the case of an LTE base station, the terminal can send an acknowledgment (ACK) signal or a negative acknowledgment (NACK) for DL ​​HARQ only in a subframe capable of UL signal transmission. Therefore, the terminal bundles and sends HARQ ACK / NACK information for multiple DL subframes at once. In this case, it is necessary to develop an LTE base station operation for receiving and processing such ACK / NACK signals. The disadvantage is that the complexity of base station development is very large because such base station operations need to be implemented differently according to the UL-DL configuration of the NR TDD system. In addition, a physical uplink control channel (PUCCH) format 3 for sending multiple ACK / NACK information is used to send HARQ ACK / NACK signals for multiple DL subframes. Because if the base station applies SUO technology, limited PUCCH format 3 resources must be used, so there is an operational limitation that the efficiency of PUCCH format 3 resource operation is reduced.

[0062] In order to solve such problems, the present disclosure provides a scheduling device and method for interference control in a mobile communication system that supports carrier aggregation or dual / multiple connection technologies in which multiple frequency resources are used simultaneously. The scheduling device and method for interference control provided by the present disclosure can be applied to all terminals regardless of whether the terminal supports the interference control function, and can be flexibly implemented for various base station UL-DL configurations with relatively low complexity through the exception handling of the UL and DL scheduling operations of the existing scheduler. The transmission and reception performance of the terminal and the base station can be improved by controlling the interference in the overall interference environment through such methods and devices.

[0063] Figure 1is a diagram illustrating a wireless communication system according to an embodiment of the present disclosure.

[0064] refer to Figure 1 , a system implementing the present disclosure is configured with multiple base stations 100 and 110 supporting one or more service cells or cell groups and a terminal 120 that simultaneously uses multiple frequency resources located in different frequency bands supported by the multiple base stations to send and receive signals. Specifically, the first base station 100 can control service cell #0 or cell group #0, the second base station 110 can control service cell #1 or cell group #1, and the terminal 120 can send UL signals to the two base stations and receive DL signals from the two base stations in operations S130 and S140. In addition, in operation S120, the two base stations can exchange information for determining a resource allocation mode. Figure 1 In the description, two base stations each supporting one service cell or cell group in a different frequency band and one terminal simultaneously sending and receiving signals using two frequency resources supported by the two base stations have been assumed, but the configuration and operation of the present disclosure are not limited to this example.

[0065] Each base station relevant to the present disclosure provides some or all of the following functions.

[0066] The base station supports a carrier aggregation technology or a dual connection technology or a multi-connection technology within the base station or in a state where the base station is connected to a plurality of base stations.

[0067] When the terminal accesses the base station for the first time or when the terminal accesses a base station with a frequency configuration different from the frequency configuration of the existing connection base station or when the terminal accesses a base station that uses a changed frequency configuration because the frequency configuration information of the existing connection base station is changed, the base station can obtain carrier aggregation and dual-connection and multi-connection frequency combination information that the terminal can support from the terminal. In addition, the base station can obtain information about the frequency combination in which IMD interference may occur among the carrier aggregation and dual-connection and multi-connection frequency combinations that the terminal can support and obtain from the terminal. In addition, the base station can obtain information about the frequency combination in which IMD interference may occur among the carrier aggregation and dual-connection and multi-connection frequency combinations that the terminal can support and obtain from the terminal.

[0068] After the terminal accesses a specific base station, the base station can obtain from the terminal information about carrier aggregation supported by the terminal and frequency combinations in which IMD interference occurs among dual-connection and multi-connection frequency combinations. In addition, the base station can obtain from the terminal information about carrier aggregation supported by the terminal and frequency combinations in which IMD interference occurs but IMD interference has been resolved among dual-connection and multi-connection frequency combinations.

[0069] The base station may exchange the information obtained from the specific terminal as information for determining a resource allocation pattern among a plurality of serving cells or cell groups within the base station with respect to the specific terminal.

[0070] The base station may be connected to a plurality of base stations with respect to a specific terminal, and may exchange information obtained from the terminal as information for determining a resource allocation pattern among a plurality of serving cells or cell groups within the plurality of base stations.

[0071] The base station may provide an allocation mode for a specific resource to a specific terminal. In addition, the base station may configure whether to always apply a resource allocation restriction based on a resource allocation mode to a specific terminal. In addition, the base station may manage a specific terminal in a state where it receives IMD interference or in a state where it does not receive IMD interference. In addition, the base station may operate resource allocation so that each resource is restricted or not restricted based on a resource allocation mode with respect to a specific terminal.

[0072] A terminal related to the present disclosure provides some or all of the following functions.

[0073] The terminal accesses one or more base stations and supports carrier aggregation technology or dual connection technology or multi-connection technology.

[0074] When the terminal accesses the base station for the first time or when the terminal accesses a base station with a frequency configuration different from the frequency configuration of the existing connection base station or when the terminal accesses a base station that uses a changed frequency configuration because the frequency configuration information of the existing connection base station is changed, the terminal can send the carrier aggregation supported by the terminal and the dual connection and multi-connection frequency combination information to the base station. In addition, the terminal can send information about the carrier aggregation supported by the terminal and the frequency combination in which IMD interference may occur among the dual connection and multi-connection frequency combinations. In addition, the terminal can send information about the carrier aggregation supported by the terminal and the frequency combination in which IMD interference occurs among the dual connection and multi-connection frequency combinations to the base station.

[0075] After the terminal accesses a specific base station, the terminal may send to the base station information about the carrier aggregation supported by the terminal and the frequency combination in which IMD interference occurs among the dual-connection and multi-connection frequency combinations. In addition, the terminal may send to the base station information about the carrier aggregation supported by the terminal and the frequency combination in which IMD interference occurs but the IMD interference has been resolved among the dual-connection and multi-connection frequency combinations.

[0076] In the present disclosure, operations performed when a terminal first accesses a base station or when a terminal accesses a base station having a frequency configuration different from that of an existing connected base station or when a terminal accesses a base station using a changed frequency configuration because the frequency configuration information of an existing connected base station is changed are described, as well as operations performed when the terminal first reports information to the base station about whether IMD interference occurs or when information reported from the terminal to the base station about whether IMD interference occurs is changed.

[0077] Furthermore, in the following description, a case where IMD interference occurs has been described, but such a method may also be applied to a case where harmonic interference (HI) occurs. The method described below may be understood and used as a method for removing or reducing IMD interference and / or HI.

[0078] Figure 2A and Figure 2B It is a diagram illustrating the operation of a base station when a terminal first accesses a base station, or when a terminal accesses a base station having a frequency configuration different from that of an existing connected base station, or when a terminal accesses a base station using a changed frequency configuration because the frequency configuration information of an existing connected base station is changed according to various embodiments of the present disclosure.

[0079] When the resource allocation mode needs to be changed during access, it can be applied Figure 2A and Figure 2B Operations such as, in addition to the above cases, resource allocation information of neighboring cells associated with a previously determined resource allocation pattern is changed, or allocated resources of channels and signals associated with a previously determined resource allocation pattern are changed.

[0080] Figure 2A is a diagram illustrating an operation in which a base station determines a resource allocation pattern and performs terminal scheduling.

[0081] refer to Figure 2A , in operation 200, the base station may obtain the resource allocation mode related information of the adjacent cell from the base station controlling the adjacent cell. Alternatively, the base station may identify the resource allocation mode related information of another service cell within the base station. For example, the resource allocation mode related information may be the allocation information of UL and DL resources on the time-frequency resources. In operation 210, the base station determines the resource allocation mode based on the resource allocation mode related information of the adjacent cell or another service cell. In this case, the base station may first determine the allocation mode of UL transmission-related resources, and may determine the allocation mode of DL transmission-related resources based on the UL transmission-related resource allocation mode, which will be described in detail later. That is, by first determining the allocation mode of UL transmission-related resources, determining the IMD interference source, and determining the resource allocation mode of DL transmission-related resources based on the determined interference source, the scheduling efficiency is maximized. Thereafter, in addition to the UL and DL transmission-related resources for which the resource allocation mode has been determined, the base station also determines the allocation mode of resources and signals. Thereafter, in operation 220, the base station performs scheduling on the terminal based on the determined resource allocation mode. Thereafter, the base station sends scheduling information for the terminal to the terminal.

[0082] In addition, although not shown, the base station controlling the neighboring cell may generate information related to the resource allocation mode of the neighboring cell and may send the information related to the resource allocation mode to the base station. The base station controlling the neighboring cell determines its own resource allocation mode, performs scheduling on the terminal based on the resource allocation mode, and sends scheduling information for the terminal to the terminal.

[0083] Figure 2B It is a detailed diagram showing the operation of a base station determining a resource allocation mode when a terminal first accesses the base station, or when the terminal accesses a base station having a frequency configuration different from that of an existing connected base station, or when the terminal accesses a base station using a changed frequency configuration because the frequency configuration information of an existing connected base station is changed, according to an embodiment of the present disclosure.

[0084] refer to Figure 2B , in operation 230, the base station determines whether the terminal has accessed the base station using a frequency combination where IMD interference may occur. In an embodiment of the present disclosure, a frequency combination where IMD interference may occur may mean carrier aggregation, dual connection, and multi-connection frequency combinations where IMD interference may occur, which have been defined in the 3GPP standard. In addition, in an embodiment of the present disclosure, whether IMD interference is received or IMD interference occurs may mean that the terminal measures and investigates whether IMD interference is received or whether IMD interference occurs, and may mean that the terminal uses multiple frequencies where IMD interference is expected to occur to send and receive signals based on frequency combination information where IMD interference may occur, which has been defined in the 3GPP standard.

[0085] If the terminal does not use the frequency combination where IMD interference may occur to access the base station, then thereafter, because IMD interference itself does not occur, the base station does not perform additional operations. However, if the terminal has used the frequency combination where IMD interference may occur to access the base station, then thereafter, because interference control for IMD interference is necessary, the base station performs additional operations.

[0086] In operation 240, a service cell (or cell group) in which scheduling and resource allocation are not restricted (or not restricted) (which can be understood as a base station controlling such a service cell or cell group) sends at least one of the following to a service cell (or cell group) in which scheduling and resource allocation are restricted (which can be understood as a base station controlling such a service cell or cell group): frame structure information of the corresponding service cell (or cell group), resource allocation related information of the service cell in which scheduling and resource allocation are not restricted, and information for determining a resource allocation restriction mode. Alternatively, such an operation can be replaced by an operation of determining a frame structure of a service cell in which scheduling and resource allocation are not restricted within the same base station and other information for determining a resource allocation restriction mode. In an embodiment of the present disclosure, other information for determining resource allocation, frequency combination information through which the corresponding terminal has passed its access restriction mode may include frequency combination information that can be supported by the corresponding terminal or base station, information on whether IMD interference has been received in a specific frequency combination of the corresponding terminal, and subcarrier spacing (SCS) information of the corresponding service cell. The resource allocation related information of the service cell in which scheduling and resource allocation are not restricted may include at least one of bitmap information about the radio bearer (RB) position capable of UL transmission for each subframe (or information about the resource position to which UL transmission has been allocated for each subframe) and bitmap information about the RB position capable of DL transmission for each subframe (or information about the resource position to which DL transmission has been allocated for each subframe).

[0087] In operation 250, the serving cell (or cell group) in which scheduling and resource allocation are restricted determines UL transmission scheduling resources, UL transmission resources, and DL feedback resource allocation patterns for UL transmission based on the obtained information. UL transmission scheduling resources, UL transmission resources, and DL feedback resources for UL transmission may be referred to as UL transmission-related resources. In an embodiment of the present disclosure, UL transmission scheduling resources may mean a UL grant allocated to a physical downlink control channel (PDCCH) region in an LTE system for scheduling UL data. UL transmission resources may mean a physical uplink shared channel (PUSCH) in an LTE system in which UL data is sent. DL feedback resources for UL transmission may mean a physical HARQ indicator channel (PHICH) in which HARQ ACK / NACK for PUSCH is sent in an LTE system in which feedback for UL data is sent. In addition, in an NR system, the UL transmission scheduling resources may be a UL grant allocated to a PDCCH region, and the UL transmission resources may be a PUSCH. In this case, DL feedback resources for UL transmission may not be configured separately.

[0088] The UL transmission resources of the service cell (or cell group) where scheduling and resource allocation are not restricted and the UL transmission-related resource allocation pattern of the service cell (or cell group) where scheduling and resource allocation are restricted are determined by such a process. Therefore, the service cell (or cell group) where scheduling and resource allocation are restricted can identify information about the DL subframe in which IMD interference is obtained.

[0089] Operation 250 may be divided into an operation of determining a resource allocation pattern when the IMD interference is allowed to occur and an operation of determining a resource allocation pattern when the IMD interference is not allowed to occur, which will be described in detail below.

[0090] Thereafter, in operation 260, the serving cell (or cell group) whose scheduling and resource allocation are restricted determines a DL transmission scheduling resource, a DL transmission resource, and an UL feedback resource allocation pattern for DL ​​transmission. The DL transmission scheduling resource, the DL transmission resource, and the UL feedback resource for DL ​​transmission may be referred to as DL transmission-related resources. In an embodiment of the present disclosure, the DL transmission scheduling resource may mean a DL allocation of a PDCCH region in an LTE system for scheduling DL data. The DL transmission resource may mean a physical downlink shared channel (PDSCH) in an LTE system to which DL data is sent. The UL feedback resource for the DL transmission resource may mean a PUCCH in which a HARQ ACK / NACK for the PDSCH is sent in an LTE system for sending feedback for DL ​​data. In addition, in an NR system, the DL transmission scheduling resource may be a DL allocation for a PDCCH region. The DL transmission resource may be a PDSCH. The UL feedback resource for the DL transmission resource may be a PUCCH.

[0091] That is, because the UL transmission resources of the service cell (or cell group) where scheduling and resource allocation are not restricted and the UL transmission-related resource allocation pattern of the service cell (or cell group) where scheduling and resource allocation are restricted have been previously determined, the service cell (or cell group) where scheduling and resource allocation are restricted allocates DL transmission-related resources according to DL transmission-related resource allocation by avoiding possible IMD interference. In this case, the service cell (or cell group) where scheduling and resource allocation are restricted determines the DL transmission-related resource allocation pattern so that the scheduling efficiency of DL transmission is maximized.

[0092] Thereafter, the serving cell (or cell group) to which scheduling and resource allocation is restricted determines an allocation pattern of resources and signals whose allocation pattern has not yet been determined in operation 270. The resources and signals whose allocation pattern has not yet been determined mean resources and signals that need to be allocated in addition to predetermined UL transmission scheduling resources, UL transmission resources, DL feedback resources for UL transmission, DL transmission scheduling resources, DL transmission resources, and UL feedback resources for DL ​​transmission.

[0093] Thereafter, in operation 280, the service cell (or cell group) where scheduling and resource allocation are restricted determines whether to always apply the resource allocation restriction based on the resource allocation pattern to the terminal that may receive IMD interference. If the resource allocation restriction based on the resource allocation pattern is always applied, the service cell (or cell group) where scheduling and resource allocation are restricted performs detailed terminal scheduling based on the resource allocation pattern. Terminal scheduling means that the time-frequency resources based on each channel and signal allocated to the terminal are determined. After the terminal scheduling, the service cell (or cell group) where scheduling and resource allocation are restricted sends scheduling information to the terminal. The scheduling information can be UL authorization, DL allocation, and information indicating other signal transmission resources.

[0094] The resource allocation pattern determined by the method can be understood as a set of time-frequency resource information to which DL channels, UL channels, and signals can be mapped at specific time intervals. Specifically, the resource allocation pattern can be understood as a set of: time-frequency resource information of at least one of a PHICH (i.e., a DL channel) in which feedback for UL data is sent, a PDCCH in which UL grants and DL allocations are sent, and a PDCCH in which DL data is sent, time-frequency resource information of at least one of a PUCCH (i.e., a UL channel) in which feedback for DL ​​data is sent and a PUSCH in which UL data is sent, and time-frequency resource information for transmission of each reference signal and system information.

[0095] Hereinafter, a subframe means a unit for resource allocation and may be used interchangeably with a slot, a mini-slot, or a transmission time interval (TTI), or may be set to a predetermined number of symbols. In addition, the number of symbols included in one subframe may differ according to the SCS.

[0096] The method of determining a resource allocation mode of UL transmission related resources is described below. The method of determining a resource allocation mode may include a method of determining a resource allocation mode when IMD interference is allowed to occur, or a method of determining a resource allocation mode when IMD interference is not allowed to occur.

[0097] Figure 3A and Figure 3B is a flowchart illustrating a method of determining a UL transmission-related resource allocation pattern when IMD interference is allowed according to various embodiments of the present disclosure.

[0098] refer to Figure 3A and Figure 3B, shows the following process of a service cell (or cell group) in which scheduling and resource allocation are restricted: first, UL transmission-related resource allocation for DL ​​and UL subframes is allowed; second, if there is a DL subframe in which IMD interference is received in the UL transmission scheduling resources when the UL transmission scheduling resources are allocated (based on the UL transmission resources of another cell or cell group), the UL transmission scheduling resource allocation is restricted (i.e., not allocated), and the allocation of UL transmission resources corresponding to the UL transmission scheduling resources and / or DL ​​feedback resources for UL transmission is restricted; third, if there is a DL subframe in which IMD interference is received in the DL feedback resources for UL transmission when the DL feedback resources for UL transmission are allocated, the UL transmission scheduling resources and the allocation of UL transmission resources corresponding to the DL feedback resources for UL transmission and DL feedback resources for UL transmission are restricted.

[0099] First, the serving cell (or cell group) whose scheduling and resource allocation are restricted allows UL transmission scheduling resource allocation for all DL subframes (or time slots) in operation 300, and allows UL transmission resource allocation for all UL subframes (or time slots) in operation 302. Thereafter, if DL feedback for UL transmission is transmitted in operation 304, the serving cell (or cell group) allows DL feedback resources for UL transmission to be allocated to all DL subframes (or time slots) in operation 306. If DL feedback for UL transmission is not transmitted, operation 306 is not performed.

[0100] Thereafter, the service cell (or cell group) whose scheduling and resource allocation are restricted divides all resources in a resource allocation pattern unit having P subframes (or time slots) as a period, and performs UL transmission scheduling resource allocation and UL transmission resource allocation and DL feedback resource allocation restriction operations for UL transmission. In an embodiment of the present disclosure, in an LTE system, the unit of P indicating the application period of the resource allocation pattern is 1 subframe. P may mean 10 corresponding to 1 radio frame, and may mean 10ms in terms of time.

[0101] The serving cell (or cell group) whose scheduling and resource allocation are restricted investigates whether it is possible to receive IMD interference in the UL transmission scheduling resource allocation region in the nth DL subframe (or time slot), while increasing n from 0 to P-1 one by one, so as to determine the UL transmission scheduling resource allocation and the UL transmission resource allocation and the DL feedback (for UL transmission) resource allocation pattern having P subframes (or time slots) as a period. Specifically, in operation 308, the serving cell (or cell group) whose scheduling and resource allocation are restricted sets n to 0. Thereafter, the serving cell (or cell group) checks whether n is less than or equal to P-1 in operation 310, and investigates in operation 312 whether it is possible to receive IMD interference in the UL transmission scheduling resource allocation region in the nth DL subframe (or time slot) if n is less than or equal to P-1.

[0102] If, as a result of the investigation of the reception of the IMD interference, the IMD interference cannot be received, the serving cell (or cell group) whose scheduling and resource allocation are restricted terminates the investigation of the nth subframe and performs the investigation of the next (n+1th) subframe. If the next (n+1th) subframe is the Pth subframe, the serving cell (or cell group) performs operation 324 without additional operation.

[0103] If, as a result of the investigation of the reception of the IMD interference, the IMD interference may be received, the service cell (or cell group) whose scheduling and resource allocation is restricted restricts the UL transmission scheduling resource allocation to the nth DL subframe (or time slot) in operation 314, restricts the allocation of the UL transmission resource to the (n+i) mod Pth UL subframe in operation 316, and determines whether DL feedback for UL transmission is transmitted in operation 318. In this case, if the service cell (or cell group) whose scheduling and resource allocation is restricted transmits DL feedback for UL transmission, the service cell (or cell group) whose scheduling and resource allocation is restricted restricts the allocation of the DL feedback resource for UL transmission to the (n+i+j) mod Pth DL subframe in operation 320. Therefore, the service cell (or cell group) whose scheduling and resource allocation is restricted terminates the investigation of the nth subframe and performs the investigation of the next (n+1th) subframe. If the next (n+1th) subframe is the Pth subframe, the service cell (or cell group) performs operation 324 without additional operation.

[0104] If the serving cell (or cell group) whose scheduling and resource allocation is restricted does not send DL feedback for UL transmission in operation 318, the serving cell (or cell group) whose scheduling and resource allocation is restricted terminates the investigation of the nth subframe and performs the investigation of the next (n+1th) subframe. If the next (n+1th) subframe is the Pth subframe, the serving cell (or cell group) whose scheduling and resource allocation is restricted performs operation 324 without additional operation.

[0105] In an embodiment of the present disclosure, if UL transmission scheduling resources are allocated to DL subframe #n, in the LTE system, the index i indicating the subframe difference taken for the corresponding UL transmission resource to be allocated to UL subframe #n+i may be 4. In this case, the time difference of 4 subframe differences may mean 4ms. In addition, if UL transmission resources are allocated to UL subframe #n+i, in the LTE system, the index j indicating the subframe difference taken for the corresponding DL feedback resource to be allocated to DL subframe #n+i+j may be 4. In this case, the time difference of 4 subframe differences may mean 4ms. In the NR system, such i and j are values ​​that can be randomly set by the base station within the range defined in the 3GPP standard. The service cell (or cell group) in which scheduling and resource allocation are restricted can determine the UL transmission-related resources by considering such i and j values ​​in the same manner.

[0106] Thereafter, in operation 324, the serving cell (or cell group) whose scheduling and resource allocation is restricted determines whether the serving cell (or cell group) whose scheduling and resource allocation is restricted transmits DL feedback for UL transmission. In this case, if the serving cell (or cell group) whose scheduling and resource allocation is restricted does not transmit DL feedback for UL transmission, the serving cell (or cell group) performs operation 340. If the serving cell (or cell group) whose scheduling and resource allocation is restricted transmits DL feedback for UL transmission, the serving cell (or cell group) whose scheduling and resource allocation is restricted investigates whether IMD interference may be received in the DL feedback resource allocation region for UL transmission in the mth DL subframe (or time slot), while increasing m from 0 to P-1 one by one, so as to determine UL transmission scheduling resource allocation and UL transmission resource allocation and DL feedback (for UL transmission) resource allocation pattern having P as a period.

[0107] Specifically, the service cell (or cell group) whose scheduling and resource allocation are restricted sets m=0 in operation 326, and then checks whether m is less than or equal to P-1 in operation 328. If m is less than or equal to P-1, in operation 330, the service cell (or cell group) investigates whether it is possible to receive IMD interference in the DL feedback resource allocation area for UL transmission in the mth DL subframe (or time slot). If, as a result of the investigation into the reception of IMD interference, IMD interference cannot be received, the service cell (or cell group) whose scheduling and resource allocation are restricted terminates the investigation into the mth subframe and performs an investigation into the next (m+1th) subframe. If, in operation 328, the next (m+1th) subframe is the Pth subframe, the service cell (or cell group) performs operation 340 without additional operations.

[0108] If, as a result of the investigation of the reception of the IMD interference, the IMD interference may be received, the serving cell (or cell group) whose scheduling and resource allocation is restricted restricts the UL transmission scheduling resource allocation to the (mij) mod P th DL subframe (or time slot) at operation 332, restricts the UL transmission resource allocation to the (mj) mod P th UL subframe (or time slot) at operation 334, and restricts the allocation of the DL feedback resource for the UL transmission to the m th DL subframe (or time slot) at operation 336. Therefore, the serving cell (or cell group) whose scheduling and resource allocation is restricted terminates the investigation of the m th subframe and performs the investigation of the next (m+1) th subframe. If the next (m+1) th subframe is the P th subframe, the serving cell (or cell group) performs operation 340 without additional operation.

[0109] Thereafter, in operation 340, the serving cell (or cell group) in which scheduling and resource allocation are restricted stores the UL transmission scheduling resources, UL transmission resources, and DL feedback (for UL transmission) resource allocation pattern information determined based on whether IMD interference is received in the UL transmission scheduling resource allocation region and whether IMD interference is received in the DL feedback resource allocation region for UL transmission. Therefore, the process of determining the UL transmission scheduling resources, UL transmission resources, and DL feedback (for UL transmission) resource allocation pattern is terminated. In this case, as described above, the resource allocation pattern information is defined for consecutive P subframes (or time slots).

[0110] Figure 3A and Figure 3B The operations shown in Figure 3A and Figure 3B If there is an intended effect of the present disclosure by changing the order of operations or omitting operations, the order of operations may be changed or operations may be omitted, and such changes or omissions may be construed as being included in the scope of the present disclosure.

[0111] In addition, in the present disclosure, the service cell (or cell group) where scheduling and resource allocation are not restricted can borrow the NR system, and the service cell (or cell group) where scheduling and resource allocation are restricted can borrow the LTE system, but the present disclosure is not limited thereto. The service cell (or cell group) where scheduling and resource allocation are not restricted or restricted can borrow one of the LTE system and the NR system. Alternatively, in the present disclosure, the service cell (or cell group) where scheduling and resource allocation are not restricted can be based on a system that performs high-speed data transmission, and the service cell (or cell group) where scheduling and resource allocation are restricted can be based on a system that performs low-speed data transmission. However, the interpretation of the present disclosure is not limited to such an embodiment, and can be used between systems that perform high-speed data transmission or between systems that perform low-speed data transmission. The service cell (or cell group) where scheduling and resource allocation are restricted can be a system that performs high-speed data transmission, and the service cell (or cell group) where scheduling and resource allocation are not restricted can be a system that performs low-speed data transmission.

[0112] Figure 4 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation pattern when IMD interference is allowed to occur according to an embodiment of the present disclosure. Figure 6 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation pattern when IMD interference is allowed according to an embodiment of the present disclosure. Figure 7 is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation pattern when IMD interference is allowed according to an embodiment of the present disclosure. Figures 4 to 7 An example is shown in which a serving cell (or cell group) in which scheduling and resource allocation are not restricted borrows the NR system and a serving cell (or cell group) in which scheduling and resource allocation are restricted borrows the LTE system, but the present disclosure is not limited to such an example.

[0113] refer to Figure 4 , shows an example of resource allocation, in which UL transmission related resources are allowed to be allocated to all subframes. A serving cell (or cell group) where scheduling and resource allocation are not restricted borrows the NR system. A serving cell (or cell group) where scheduling and resource allocation are not restricted sends its own resource allocation mode related information to a serving cell (or cell group) where scheduling and resource allocation are restricted. The NR system can operate according to TDD. The NR TDD subframe 400 can be configured with DL resources, UL resources, and flexible resources (resources that are not predetermined whether they will be used in DL or UL). Figure 4NR TDD resource allocation mode is shown. In this case, the serving cell (or cell group) with restricted scheduling and resource allocation allows UL grant 440 to be allocated to all subframes of LTE DL subframe 420, and allows PHICH 450 to be allocated to all subframes of LTE DL subframe 420. In addition, the serving cell (or cell group) with restricted scheduling and resource allocation allows PUSCH 430 to be allocated to all subframes of LTE UL subframe 410. Figure 4 Corresponds to Figure 3A Operations 300 to 306 in .

[0114] refer to Figure 5 , shows an example of limiting the allocation of PUSCH and PHICH corresponding to the UL grant if received in the UL grant region. NR TDD UL transmission and LTE FDD UL transmission may overlap in subframe #2 500 and subframe #7 510. The UL grants of subframe #2 and subframe #7 may be affected by IMD interference. In this case, the serving cell (or cell group) whose scheduling and resource allocation are restricted does not allocate UL grants to subframe #2 502 and subframe #7 512 of the LTE FDD DL subframe 420. In addition, therefore, if the UL grant already exists in subframe #2 and subframe #7, the serving cell (or cell group) whose scheduling and resource allocation are restricted does not allocate PUSCH to subframe #6 520 and subframe #1 530 of the LTE FDD UL subframe 410 that may have corresponded. Furthermore, if UL grant already exists in subframe #2 and subframe #7, the serving cell (or cell group) whose scheduling and resource allocation is restricted does not allocate PHICH to subframe #0 540 and subframe #5 550 which may have corresponded to LTE FDD DL subframe 420 . Figure 5 Can correspond to Figure 3A Operations 308 to 322 in .

[0115] refer to Figure 6, shows an example of limiting the allocation of UL grants corresponding to PHICH, PUSCH, and PHICH if IMD interference is received in the PHICH region. NR TDD UL transmission and LTE FDD UL transmission may overlap in subframe #2 600 and subframe #7 610. Therefore, the PHICH of subframe #2 and subframe #7 may be affected by IMD interference. In this case, the serving cell (or cell group) whose scheduling and resource allocation are restricted does not allocate PHICH to subframe #2 602 and subframe #7 612 of the LTE FDD DL subframe 420. In addition, therefore, if PHICH already exists in subframe #2 and subframe #7, the serving cell (or cell group) whose scheduling and resource allocation are restricted does not allocate PUSCH to subframe #8 620 and subframe #3 630 of the LTE FDD UL subframe 410 that may have corresponded. Furthermore, if PHICH already exists in subframe #2 and subframe #7, the serving cell (or cell group) whose scheduling and resource allocation is restricted does not allocate UL grant to subframe #4 640 and subframe #9 650 which may have corresponded to LTE FDD DL subframe 420 . Figure 6 Can correspond to Figure 3B Operations 324 to 338 in .

[0116] refer to Figure 7 , which shows the result of the allocation of UL transmission related resources. Figures 4 to 6 The process determines such Figure 7 Such a pattern is stored by the serving cell (or cell group) for which scheduling and resource allocation are restricted.

[0117] Figure 8 is a diagram for describing detailed operations of a method for determining a UL transmission-related resource allocation pattern when IMD interference is not allowed according to an embodiment of the present disclosure.

[0118] refer to Figure 8 , shows a method for time-multiplexing UL transmissions of different cells or cell groups so that IMD interference does not occur in a DL subframe due to overlapping UL transmissions of different cells or cell groups.

[0119] The serving cell (or cell group) whose scheduling and resource allocation are restricted allows UL transmission scheduling resources to be allocated to all DL subframes (or time slots) at operation 800, and allows UL transmission resources to be allocated to all UL subframes (or time slots) at operation 802. Next, at operation 804, the serving cell (or cell group) whose scheduling and resource allocation are restricted determines whether DL feedback for UL transmission is transmitted. In this case, at operation 806, the serving cell (or cell group) allows DL feedback resources for UL transmission to be allocated to all DL subframes (or time slots). If DL feedback for UL transmission is not transmitted, the serving cell (or cell group) performs operation 808 without separate operation.

[0120] The serving cell (or cell group) whose scheduling and resource allocation are restricted divides all resources in a resource allocation pattern unit having P subframes (or time slots) as a period, and performs UL transmission scheduling resource allocation and UL transmission resource allocation and DL feedback resource allocation restriction operations for UL transmission.

[0121] A service cell (or cell group) with restricted scheduling and resource allocation determines whether a service cell (or cell group) with unrestricted scheduling and resource allocation allocates UL transmission resources at the same timing as the nth UL subframe (or time slot) of the service cell (or cell group) with restricted scheduling and resource allocation, while increasing n from 0 to P-1 one by one, so as to determine the UL transmission scheduling resource allocation and the UL transmission resource allocation and the DL feedback (for UL transmission) resource allocation mode with P subframes (or time slots) as a period.

[0122] Specifically, the service cell (or cell group) with restricted scheduling and resource allocation sets n to 0 in operation 808, and then checks whether n is less than or equal to P-1 in operation 810. If n is less than or equal to P-1, in operation 812, the service cell (or cell group) determines whether the service cell (or cell group) with unrestricted scheduling and resource allocation allocates (or can allocate) UL transmission resources in the nth DL subframe (or time slot). If the service cell (or cell group) with unrestricted scheduling and resource allocation does not allocate UL transmission resources, the service cell (or cell group) with restricted scheduling and resource allocation terminates the investigation of the nth subframe (or time slot) and performs an investigation of the next (n+1th) subframe (or time slot). If the next (n+1th) subframe is the Pth subframe, the service cell (or cell group) performs operation 824 without additional operations.

[0123] If, as a result of the investigation, the service cell (or cell group) in which scheduling and resource allocation is not restricted allocates UL transmission resources, the service cell (or cell group) in which scheduling and resource allocation is restricted restricts the allocation of UL transmission scheduling resources to the (ni) mod P th DL subframe (or time slot) at operation 814, restricts the allocation of UL transmission resources to the n th UL subframe at operation 816, and determines whether the service cell (or cell group) in which scheduling and resource allocation is restricted transmits DL feedback for UL transmission at operation 818. In this case, if the service cell (or cell group) in which scheduling and resource allocation is restricted transmits DL feedback for UL transmission, the service cell (or cell group) in which scheduling and resource allocation is restricted restricts the allocation of DL feedback resources for UL transmission to the (n+j) mod P th DL subframe at operation 820. Therefore, the service cell (or cell group) in which scheduling and resource allocation is restricted terminates the investigation of the n th subframe and performs the investigation of the next (n+1 th) subframe. If the next (n+1)th subframe is the Pth subframe, the serving cell (or cell group) performs operation 824 without additional operation.

[0124] If the serving cell (or cell group) whose scheduling and resource allocation is restricted does not send DL feedback for UL transmission, the serving cell (or cell group) whose scheduling and resource allocation is restricted terminates the investigation of the nth subframe and performs the investigation of the next (n+1th) subframe at operation 822. If the next (n+1th) subframe is the Pth subframe, the serving cell (or cell group) whose scheduling and resource allocation is restricted performs operation 824 without additional operation.

[0125] At operation 824, the serving cell (or cell group) in which scheduling and resource allocation are restricted stores the UL transmission scheduling resources, UL transmission resources, and DL feedback (for UL transmission) resource allocation pattern information determined according to whether IMD interference occurs in the UL transmission resource allocation area. Therefore, the process of determining the UL transmission scheduling resources, UL transmission resources, and DL feedback (for UL transmission) resource allocation pattern is terminated. In this case, as described above, the resource allocation pattern information is defined for consecutive P subframes (or time slots).

[0126] Figure 8 The operations shown do not require Figure 8 If there is an intended effect of the present disclosure by changing the order of operations or omitting operations, the order of operations may be changed or operations may be omitted, and such changes or omissions may be construed as being included in the scope of the present disclosure.

[0127] Figures 9 to 12is a diagram illustrating a detailed example of resource allocation based on a method of determining a resource allocation pattern when IMD interference is not allowed to occur according to various embodiments of the present disclosure. Figures 9 to 12 An example is shown in which a serving cell (or cell group) in which scheduling and resource allocation are not restricted borrows the NR system and a serving cell (or cell group) in which scheduling and resource allocation are restricted borrows the LTE system, but the present disclosure is not limited to such an example.

[0128] refer to Fig. 9 , Fig. 9 900. It is a diagram showing an example of resource allocation in which UL transmission related resources have been allowed to be allocated to all subframes. A serving cell (or cell group) where scheduling and resource allocation are not restricted borrows the NR system. A serving cell (or cell group) where scheduling and resource allocation are not restricted sends its own resource allocation mode related information to a serving cell (or cell group) where scheduling and resource allocation are restricted. The NR system may operate according to TDD, and the resource allocation mode may be the same as the NR TDD subframe 900. In this case, a serving cell (or cell group) where scheduling and resource allocation are restricted allows UL grant 940 to be allocated to all subframes of LTE DL subframe 920, and allows PHICH 950 to be allocated to all subframes of LTE DL subframe 920. In addition, a serving cell (or cell group) where scheduling and resource allocation are restricted allows PUSCH 930 to be allocated to all subframes of LTE UL subframe 910. Fig. 9 Corresponds to Figure 8 Operations 800 to 806 in .

[0129] refer to Fig.10 , Fig.10 is a diagram showing an example of determining PUSCH resources allocated simultaneously with NR UL transmission resources. In this case, in addition to UL resources, NR UL transmission resources also include flexibly configured resources with the possibility that UL transmission will be performed. In the case of subframe #1 10000, subframe #2 1010, subframe #6 1020, and subframe #7 1030, if PUSCH resources are allocated to LTE FDD UL subframe 910, IMD interference may occur. Therefore, a serving cell (or cell group) in which scheduling and resource allocation are restricted may not allocate PUSCH resources to subframe #1 10000, subframe #2 1010, subframe #6 1020, and subframe #7 1030. Fig.10 Can correspond to Figure 8 Operation 812 in .

[0130] refer to Fig.11 , Fig.111 is a diagram showing an example of allocation of a PUSCH, a UL grant corresponding to the PUSCH, a PHICH, and a restricted PUSCH simultaneously allocated with NR UL transmission resources. If PUSCH resources have been allocated to subframe #1 10000, subframe #2 1010, subframe #6 1020, and subframe #7 1030, a serving cell (or cell group) whose scheduling and resource allocation are restricted determines the UL grant and PHICH resources that may have been corresponding, and restricts resource allocation. Specifically, the serving cell (or cell group) whose scheduling and resource allocation are restricted does not allocate UL grants to subframe #7 1100, subframe #8 1110, subframe #2 1120, and subframe #3 1130 of LTE FDD DL subframe 920 (corresponding to n-4 subframes if PUSCH transmission has been performed in subframe n). In addition, the serving cell (or cell group) in which scheduling and resource allocation are restricted does not allocate UL grant to subframe #5 1140, subframe #6 1150, subframe #0 1160 and subframe #1 1170 of the LTE FDD DL subframe 920 (corresponding to n+4 subframe if PUSCH transmission has been performed in subframe n).

[0131] refer to Fig.12 , Fig.12 FIG. 4 is a diagram showing the result of allocating UL transmission related resources. Figures 9 to 11 The process determines such Fig.12 Such a pattern is stored by the serving cell (or cell group) for which scheduling and resource allocation are restricted.

[0132] FIG. 13A to FIG. 13C is a diagram for describing detailed operations of a method for determining a DL transmission-related resource allocation pattern by a serving cell (or cell group) in which scheduling and resource allocation are restricted according to various embodiments of the present disclosure.

[0133] refer to FIG. 13A to FIG. 13C , FIG. 13A to FIG. 13C The following process is configured for a service cell (or cell group) with scheduling and resource allocation restrictions: first, DL transmission related resource allocation for DL ​​and UL subframes is not allowed; second, DL transmission scheduling resources and DL transmission resources are allocated to DL subframes in which no IMD interference is received through DL transmission scheduling resources or DL ​​transmission resources; third, if DL transmission scheduling resources and DL transmission resources are allocated, the corresponding UL feedback resources for DL ​​transmission when IMD interference occurs in the DL channel, and the signal pre-allocated by the UL feedback resources for DL ​​transmission are allocated, otherwise, the DL transmission scheduling resources and DL transmission resources are not allocated.

[0134] At operation 1300, the serving cell (or cell group) whose scheduling and resource allocation is restricted obtains the determined UL transmission scheduling, UL transmission and DL feedback (for UL transmission) resource allocation pattern information. In addition, the serving cell (or cell group) whose scheduling and resource allocation is restricted restricts the allocation of DL transmission scheduling resources to all DL subframes (or time slots) at operation 1302, restricts the allocation of DL transmission resources to all DL subframes (or time slots) at operation 1304, and restricts the allocation of UL feedback resources for DL ​​transmission to all UL subframes (or time slots) at operation 1306.

[0135] In the next operation, the serving cell (or cell group) in which scheduling and resource allocation are restricted divides all resources in a resource allocation pattern unit having P subframes (or time slots) as a period, and performs DL transmission scheduling resources and DL transmission resource allocation allowing operations.

[0136] If allocation of DL transmission scheduling resources or DL ​​transmission resources is allowed in the nth DL subframe (or time slot), the serving cell (or cell group) whose scheduling and resource allocation is restricted investigates whether IMD interference may be received in the area, while increasing n from 0 to P-1 one by one, so as to determine DL transmission scheduling resources and a DL transmission resource allocation pattern having P subframes (or time slots) as a period. Specifically, the serving cell (or cell group) whose scheduling and resource allocation is restricted sets n to 0 in operation 1308, and then checks whether n is less than or equal to P-1 in operation 1310. If n is less than or equal to P-1, then in operation 1312, if DL transmission scheduling resources or DL ​​transmission resources have been allocated in the nth DL subframe (or time slot), the serving cell (or cell group) investigates whether IMD interference may be received in the allocated area.

[0137] If, as a result of the investigation of the reception of IMD interference in the DL transmission scheduling resources or the DL transmission resource allocation region of the nth DL subframe (or time slot), IMD interference may be received, the service cell (or cell group) whose scheduling and resource allocation is restricted terminates the investigation of the nth subframe (without allocating DL transmission scheduling resources and DL transmission resources), and performs an investigation of the next (n+1th) subframe. If the next (n+1th) subframe is the Pth subframe, the service cell (or cell group) whose scheduling and resource allocation is restricted performs operation 1318 without additional operations. However, if, as a result of the investigation of the reception of IMD interference in the DL transmission scheduling resources or the DL transmission resource allocation region of the nth DL subframe (or time slot), IMD interference cannot be received, then in operation 1314, the service cell (or cell group) whose scheduling and resource allocation is restricted allows the allocation of DL transmission scheduling resources and DL transmission resources in the nth DL subframe (or time slot). Thereafter, the serving cell (or cell group) whose scheduling and resource allocation are restricted performs investigation on the next (n+1)th DL subframe. If the next (n+1)th subframe is the Pth subframe, the serving cell (or cell group) performs operation 1318 without additional operation.

[0138] Thereafter, the service cell (or cell group) in which scheduling and resource allocation are restricted divides all resources in a resource allocation pattern unit having P subframes (or time slots) as a period, and performs DL transmission scheduling resources and DL transmission resource allocation restriction and UL feedback resource allocation permission operations for DL ​​transmission.

[0139] The serving cell (or cell group) whose scheduling and resource allocation is restricted determines whether the allocation of DL transmission scheduling resources and DL transmission resources is allowed in the (mk) mod P DL subframe (or time slot), while increasing m from 0 to P-1 one by one, so as to determine the DL transmission scheduling resources and DL transmission resources and the UL feedback (for DL ​​transmission) resource allocation pattern having P subframes (or time slots) as a period. Specifically, the serving cell (or cell group) whose scheduling and resource allocation is restricted sets m to 0 in operation 1318, and then checks whether m is less than or equal to P-1 in operation 1320. If m is less than or equal to P-1, then in operation 1322, the serving cell (or cell group) determines whether the allocation of DL transmission scheduling resources and DL transmission resources has been allowed in the mk th DL subframe (or time slot).

[0140] If the allocation of DL transmission scheduling resources and DL transmission resources has not been allowed in the mk-th DL subframe (or time slot), the service cell (or cell group) whose scheduling and resource allocation is restricted terminates the investigation of the m-th subframe and performs the investigation of the next (m+1)-th subframe. If at operation 1320, the next (m+1)-th subframe is the P-th subframe, the service cell (or cell group) whose scheduling and resource allocation is restricted performs operation 1338 without additional operation. However, if the allocation of DL transmission scheduling resources and DL transmission resources has not been allowed in the (mk) mod P-th DL subframe (or time slot), at operation 1324, if the allocation of UL feedback resources for DL ​​transmission (of the mk-th subframe) to the m-th UL subframe (or time slot) is allowed, the service cell (or cell group) whose scheduling and resource allocation is restricted investigates whether it is possible to receive IMD interference in the DL transmission scheduling resource area to which allocation has been allowed in the m-th DL subframe (or time slot). That is, this is to identify whether IMD interference is received in a DL transmission scheduling resource region to which allocation has been allowed because UL transmissions of different cells or cell groups overlap due to allocation of UL feedback resources for DL ​​transmission in the mth subframe.

[0141] If, as a result of investigation of reception of IMD interference in the allocation allowed area of ​​DL transmission scheduling resources to which allocation has been allowed in the m-th DL subframe (or time slot) in operation 1324, IMD interference may be received, the service cell (or cell group) whose scheduling and resource allocation are restricted limits the allocation of DL transmission scheduling resources and DL transmission resources previously allowed in the (mk) mod P-th DL subframe (or time slot) in operation 1334, and terminates the investigation of the m-th subframe. Thereafter, the service cell (or cell group) whose scheduling and resource allocation are restricted performs an investigation of the next (m+1)-th subframe. If the next (m+1)-th subframe is the P-th subframe, the service cell (or cell group) performs operation 1338 without additional operations. However, if, as a result of the investigation of the reception of IMD interference in the DL transmission scheduling resource region to which allocation has been allowed in the m-th DL subframe (or time slot), no IMD interference is received, then if allocation of the UL feedback resource for DL ​​transmission to the m-th UL subframe (or time slot) is allowed, the serving cell (or cell group) to which scheduling and resource allocation is restricted investigates whether it is possible to receive IMD interference in the DL transmission resource region to which allocation has been allowed to the m-th DL subframe (or time slot) at operation 1326. That is, this is to identify whether IMD interference is received in the DL transmission resource region to which allocation has been allowed because UL transmissions of different cells or cell groups overlap due to allocation of the UL feedback resource for DL ​​transmission to the m-th subframe.

[0142] If, as a result of investigation of the reception of IMD interference in the DL transmission resource area to which allocation has been allowed in the m-th DL subframe (or time slot), IMD interference may be received, the service cell (or cell group) whose scheduling and resource allocation are restricted restricts the allocation of DL transmission scheduling resources and DL transmission resources previously allowed in the (mk) mod P-th DL subframe (or time slot) at operation 1334, and terminates the investigation of the m-th subframe. Thereafter, the service cell (or cell group) whose scheduling and resource allocation are restricted performs an investigation of the next (m+1)-th subframe. If the next (m+1)-th subframe is the P-th subframe, the service cell (or cell group) performs operation 1338 without additional operations. However, if, as a result of the investigation of the reception of IMD interference in the DL transmission resource region to which allocation has been permitted in the m-th DL subframe (or time slot), no IMD interference is received, then, if allocation of the UL feedback resource for DL ​​transmission to the m-th UL subframe (or time slot) is permitted, the serving cell (or cell group) to which scheduling and resource allocation is restricted investigates whether IMD interference may be received in the UL transmission scheduling resource region to which allocation has been permitted in the m-th DL subframe (or time slot) at operation 1328. That is, this is to identify whether IMD interference is received in the UL transmission scheduling resource region to which allocation has been permitted because UL transmissions of different cells or cell groups overlap due to allocation of the UL feedback resource for DL ​​transmission to the m-th subframe.

[0143] If, as a result of investigation of the reception of IMD interference in the UL transmission scheduling resource allocation allowed area to which allocation has been allowed in the m-th DL subframe (or time slot), IMD interference may be received, then in operation 1334, the service cell (or cell group) whose scheduling and resource allocation are restricted restricts the allocation of DL transmission scheduling resources and DL transmission resources previously allowed in the (mk) mod P-th DL subframe (or time slot). As described above, the service cell (or cell group) whose scheduling and resource allocation are restricted terminates the investigation of the m-th subframe and performs an investigation of the next (m+1)-th subframe. If the next (m+1)-th subframe is the P-th subframe, the service cell (or cell group) performs 1338 without additional operations. However, if, as a result of investigation of the reception of IMD interference in the UL transmission scheduling resource allocation allowed region to which allocation has been allowed in the m-th DL subframe (or time slot), no IMD interference is received, then, if allocation of the DL feedback resource for UL transmission to the m-th UL subframe (or time slot) is allowed, the serving cell (or cell group) to which scheduling and resource allocation is restricted investigates whether IMD interference may be received in the DL feedback resource region for UL transmission to which allocation has been allowed in the m-th DL subframe (or time slot) at operation 1330. That is, this is to identify whether IMD interference is received in the DL feedback resource region for UL transmission to which allocation has been allowed because UL transmissions of different cells or cell groups overlap due to allocation of the UL feedback resource for DL ​​transmission to the m-th subframe.

[0144] If, as a result of investigation of the reception of IMD interference in the DL feedback resource area for UL transmission to which allocation has been allowed in the m-th DL subframe (or time slot), IMD interference may be received, the service cell (or cell group) whose scheduling and resource allocation is restricted restricts the allocation of DL transmission scheduling resources and DL transmission resources previously allowed in the (mk) mod P-th DL subframe (or time slot) at operation 1334, and terminates the investigation of the m-th subframe. The service cell (or cell group) whose scheduling and resource allocation is restricted performs an investigation of the next (m+1)-th subframe. If the next (m+1)-th subframe is the P-th subframe, the service cell (or cell group) performs operation 1338 without additional operations. However, if, as a result of investigation of reception of IMD interference in the DL feedback resource allocation allowed region for UL transmission to which allocation has been allowed in the m-th DL subframe (or time slot), no IMD interference is received, the serving cell (or cell group) to which scheduling and resource allocation are restricted allows allocation of UL feedback resources for DL ​​transmission to the m-th UL subframe (or time slot) and performs investigation of the next (m+1)-th subframe at operation 1332. At operation 1336, m is incremented by 1, and the process returns to operation 1320. At operation 1320, if the next (m+1)-th subframe is the P-th subframe, the serving cell (or cell group) performs operation 1338 without additional operations.

[0145] In an embodiment of the present disclosure, if DL transmission resources are allocated to DL subframe m, the index k indicating the subframe difference taken for the UL feedback transmission resources to be allocated to UL subframe m+k may mean 4 in LTE. In this case, the time difference of 4 subframe differences may mean 4ms. Such k is a value that can be randomly set by the base station within the range defined in the 3GPP standard in the NR system. The serving cell (or cell group) where scheduling and resource allocation are restricted can determine DL transmission-related resources by considering such a k value in the same manner.

[0146] Thereafter, in operation 1338, the service cell (or cell group) in which scheduling and resource allocation are restricted stores DL transmission scheduling resources, DL transmission resources, and UL feedback (for DL ​​transmission) resource allocation pattern information determined according to whether IMD interference is received in the DL transmission scheduling resources or the DL transmission resource allocation region and whether IMD interference is received in the DL transmission scheduling resource allocation region, the DL transmission resource allocation region, the UL transmission scheduling resource region, and the DL feedback resource allocation region for UL transmission (for allowing allocation of UL feedback resources for DL ​​transmission). Therefore, the process of investigating the DL transmission scheduling resources, the DL transmission resources, and the UL feedback (for DL ​​transmission) resource allocation pattern is terminated. In this case, as described above, the resource allocation pattern information is defined for consecutive P subframes (or time slots).

[0147] FIG. 13A to FIG. 13C The steps shown do not need to be FIG. 13A to FIG. 13C If there is an intended effect of the present disclosure by changing the order of operations or omitting operations, the order of operations may be changed or operations may be omitted, and such changes or omissions may be construed as being included in the scope of the present disclosure.

[0148] Figures 14 to 18 is a diagram illustrating a detailed example of resource allocation based on a method of determining a DL transmission-related resource allocation pattern according to various embodiments of the present disclosure. Figures 14 to 18 An example is shown in which a serving cell (or cell group) in which scheduling and resource allocation are not restricted borrows the NR system and a serving cell (or cell group) in which scheduling and resource allocation are restricted borrows the LTE system, but the present disclosure is not limited to such an example.

[0149] refer to Fig.14 , Fig.14 1400 is a diagram showing an example of determining a DL subframe in which IMD interference is not received. A serving cell (or cell group) in which scheduling and resource allocation are not restricted borrows the NR system. A serving cell (or cell group) in which scheduling and resource allocation are not restricted sends its own resource allocation pattern related information to a serving cell (or cell group) in which scheduling and resource allocation are restricted. The NR system may operate according to TDD. The resource allocation pattern may be the same as that of the NR TDD subframe 1400. In this case, by Figure 8 The resource allocation mode of UL transmission related resources determined by the method is Fig.12 same. Figures 14 to 18 Shown based on Fig.12 A method for determining a resource allocation pattern for DL ​​transmission related resources.

[0150] In the case of LTE FDD DL subframe 1420, IMD interference is not received in all subframes (the reason is that NRTDD UL transmission and LTE FDD UL transmission do not overlap in the time domain). Accordingly, the serving cell (or cell group) whose scheduling and resource allocation are restricted can identify all subframes of LTE FDD DL subframe 1420 as subframes in which IMD interference is not received. Fig.14 Can correspond to Fig.13A Operation 1312.

[0151] refer to Fig.15 , Fig.15 is a diagram showing an example of DL allocation to a DL subframe in which IMD interference is not received and allocating a PDSCH to the DL subframe. Fig.14 In the example, the serving cell (or cell group) whose scheduling and resource allocation is restricted has identified that IMD interference is not received in all subframes of the LTE FDD DL subframe 1420, and therefore DL allocation 1510 and PDSCH 1520 can be allocated to all subframes 1500 of the LTE FDD DL subframe 1420. Fig.15 Can correspond to Fig.13A Operation 1314 in .

[0152] refer to Fig.16 , Fig.16 1600, subframe #2 1610, subframe #6 1620, and subframe #7 1630 of the LTE FDD UL subframe 1410, IMD interference occurs in the LTE FDD DL subframe 1420 because such PUCCH transmission overlaps with the NR TDD UL transmission. In order to prevent such IMD interference, the serving cell (or cell group) in which scheduling and resource allocation are restricted restricts DL allocation of subframe #7 1640, subframe #8 1650, subframe #2 1660, and subframe #3 1670, and PDSCH allocation through which the corresponding PUCCH is transmitted in subframe #1 1600, subframe #2 1610, subframe #6 1620, and subframe #7 1630. That is, the serving cell (or cell group) in which scheduling and resource allocation are restricted restricts such DL allocation and PDSCH allocation in order to prevent the occurrence of PUCCH causing IMD interference in pre-allocated UL grant, DL allocation, PDSCH, and PHICH (which may be referred to as pre-allocated DL channels). Fig.16Can correspond to FIG. 13B to FIG. 13C Operations 1324 to 1330 in .

[0153] refer to Fig.17 , Fig.17 1410 of the LTE FDD UL subframe 1410, subframe #0, subframe #3, subframe #4, subframe #5, subframe #8, and subframe #91700, but no IMD interference occurs.

[0154] Fig.18 is a diagram showing a resource allocation pattern of finally determined UL transmission-related resources and DL transmission-related resources.

[0155] refer to Fig.18 , in the LTE system, compared with the related art technology capable of transmitting PDSCH and PUSCH in all subframes, PDSCH can be allocated to 60% of all subframes and PUSCH can be allocated to 60% of all subframes.

[0156] The resource allocation mode provided by the present disclosure has the following characteristics. According to the resource allocation mode, a serving cell (or cell group) whose scheduling and resource allocation are restricted allows some of the UL allocated resources that can be used for UL channels, and allows some of the DL allocated resources that can be used for DL ​​channels. Fig.18 In the example of , both PUSCH and PUCCH have been allocated to the same subframe, but they can be mapped to different subframes. That is, both PUSCH and PUCCH transmission resources exist in the first subframe, but only PUSCH transmission resources can exist in the second subframe, and only PUCCH transmission resources can exist in the third subframe. In addition, according to the resource allocation mode, if there is a UL authorization resource, the UL data resource corresponding to the UL authorization is reserved by the base station based on a predetermined timing or there is a UL data resource. If there is a DL allocation resource, the DL data corresponding to the DL allocation and the UL feedback information resource for the DL data are reserved by the base station based on a predetermined timing or there is a DL data resource corresponding to the DL allocation. In addition, according to the resource allocation mode, the resources capable of UL transmission of the service cell (or cell group) where scheduling and resource allocation are not restricted and the allowed UL channel resources of the service cell (or cell group) where scheduling and resource allocation are restricted do not overlap in the time domain. DL channel resources overlap in the time domain with the resources capable of UL transmission of the service cell (or cell group) where scheduling and resource allocation are not restricted and correspond to the UL channel of the service cell (or cell group) where scheduling and resource allocation are restricted, and may not be allocated.

[0157] The service cell (or cell group) whose scheduling and resource allocation pattern of the resource allocation pattern of the UL transmission related resources and the DL transmission related resources has been determined using the above method determines the allocation pattern of the resources and signals whose allocation pattern has not yet been determined in the service cell (or cell group) whose scheduling and resource allocation is restricted. The resources and signals whose allocation pattern has not yet been determined mean the resources and signals that need to be allocated in addition to the determined UL transmission scheduling resources, UL transmission resources, DL feedback resources for UL transmission, DL transmission scheduling resources, DL transmission resources, and UL feedback resources for DL ​​transmission.

[0158] For resources and signals whose allocation pattern has not yet been determined, the service cell (or cell group) whose scheduling and resource allocation are restricted needs to determine the resource allocation pattern so that resource allocation and signal transmission and reception can be performed based on the determined resource allocation pattern, while preventing IMD interference from being received in the subframe (or time slot) to which resource allocation has been allowed. To this end, when resources and signals whose allocation pattern has not yet been determined (hereinafter referred to as "non-determined resources and signals") are allocated, the service cell (or cell group) whose scheduling and resource allocation are restricted can change parameters to determine the resources of the non-determined resources and signals so that the resources of the non-determined resources and signals are included in the predetermined resource allocation pattern. For example, the service cell (or cell group) whose scheduling and resource allocation are restricted can set a period or offset value indicating the resources in which the non-determined signal is sent based on a predetermined resource allocation pattern.

[0159] If it is difficult to determine the resource allocation pattern while maintaining the predetermined resource allocation pattern due to the allocation characteristics of the resources and signals for which the allocation pattern has not been determined (for example, if the pattern is periodically allocated or allocated at a predetermined position or the service provider wants the resources to be allocated at a specific position), the service cell (or cell group) in which scheduling and resource allocation are restricted can determine the resource allocation pattern so that all resources for which the allocation pattern has been predetermined and the resources and signals for which the allocation pattern has not been determined can be allocated without being affected by IMD interference while partially changing the existing allocation pattern. In order to determine the resource and signal allocation pattern in this operation, the method for determining UL transmission-related resources and DL transmission-related resources can be similarly applied. In an embodiment of the present disclosure, resources and signals for which an allocation pattern has not yet been determined may mean transmissions according to: periodic channel state information (P-CSI) reports, scheduling requests (SRs), physical broadcast channels (PBCHs), positioning reference signals (PRSs), channel state information reference signals (CSI-RSs), sounding reference signals (SRSs), system information (system information blocks (SIBs)), paging, signaling radio bearers (SRBs), Internet Protocol (IP) multimedia subsystems (IMSs), and evolved multimedia broadcast multicast services (eMBMS) in LTE systems.

[0160] Thereafter, the service cell (or cell group) in which scheduling and resource allocation are restricted can determine whether to always apply the resource allocation restriction according to the determined resource allocation mode to the terminal that may receive IMD interference. If it is determined that the resource allocation restriction is always applied based on the resource allocation mode, when the terminal accesses the base station using a frequency combination in which IMD interference may occur, the service cell (or cell group) in which scheduling and resource allocation are restricted always performs the resource allocation restriction based on the resource allocation mode, regardless of whether IMD interference actually occurs in the terminal. In an embodiment of the present disclosure, whether the resource allocation restriction based on the resource allocation mode is always applied to the terminal that may receive IMD interference can be determined by the base station operator.

[0161] Described below is an operation performed when the terminal reports information on whether IMD interference occurs to the base station for the first time or if information on whether IMD interference occurs reported by the terminal to the base station changes.

[0162] Fig.19 is a diagram illustrating an operation of a base station when a terminal reports information on whether IMD interference occurs to the base station for the first time or if information on whether IMD interference occurs reported by the terminal to the base station is changed according to an embodiment of the present disclosure.

[0163] refer to Fig.19 , Fig.19The following configurations are shown: if a service cell (or cell group) with restricted scheduling and resource allocation applies a resource allocation restriction based on a resource allocation pattern to a specific terminal, the service cell (or cell group) with restricted scheduling and resource allocation performs resource allocation based on the resource allocation pattern; if the service cell (or cell group) with restricted scheduling and resource allocation conditionally applies the resource allocation restriction based on the resource allocation pattern to the terminal, then when the specific terminal reports the occurrence of IMD interference, the service cell (or cell group) with restricted scheduling and resource allocation performs resource allocation based on the resource allocation pattern; when the terminal reports no information, the service cell (or cell group) with restricted scheduling and resource allocation follows the restriction without any change to the prior art (i.e., without determining whether to apply or not to apply the resource allocation restriction); and if the terminal does not report the occurrence of IMD interference and reports a solution to the IMD interference, the service cell (or cell group) with restricted scheduling and resource allocation performs resource allocation without applying the resource allocation restriction.

[0164] In operation 1900, the serving cell (or cell group) to which scheduling and resource allocation are restricted determines whether it has been determined that resource allocation restriction based on resource allocation mode is always applied. If it has been determined that resource allocation restriction based on resource allocation mode is not always applied, the serving cell (or cell group) to which scheduling and resource allocation are restricted performs operation 1910, and if it has been determined that resource allocation restriction based on resource allocation mode is always applied, performs operation 1940.

[0165] In operation 1910, the service cell (or cell group) where scheduling and resource allocation are restricted determines whether the terminal has reported the occurrence of IMD interference to the base station when the terminal accesses the base station. If the terminal has not reported the occurrence of IMD interference to the base station when the terminal accesses the base station, the service cell (or cell group) where scheduling and resource allocation are restricted performs operation 1920, and if the terminal has reported the occurrence of IMD interference to the base station when the terminal accesses the base station, then performs operation 1940.

[0166] In operation 1920, the service cell (or cell group) where scheduling and resource allocation are restricted determines whether the terminal has reported the occurrence of IMD interference to the base station after accessing the base station. If the terminal has not reported the occurrence of IMD interference to the base station after accessing the base station, the service cell (or cell group) where scheduling and resource allocation are restricted performs operation 1930, and if the terminal has reported the occurrence of IMD interference to the base station after accessing the base station, the service cell (or cell group) where scheduling and resource allocation are restricted performs operation 1940.

[0167] In operation 1930, the serving cell (or cell group) whose scheduling and resource allocation are restricted determines whether the terminal has reported a solution to the IMD interference to the base station after accessing the base station. The report of the solution to the IMD interference may be information indicating that the IMD interference has occurred but has been resolved or information indicating that the IMD interference has not occurred. If the terminal has not reported a solution to the IMD interference to the base station after accessing the base station, the serving cell (or cell group) terminates the operation without additional operation. If the terminal has reported a solution to the IMD interference to the base station after accessing the base station, the serving cell (or cell group) whose scheduling and resource allocation are restricted performs operation 1960.

[0168] Operation 1940 is an operation of managing a corresponding terminal in a service cell (or cell group) where scheduling and resource allocation are restricted while receiving IMD interference. In this operation, a service cell (or cell group) where scheduling and resource allocation are restricted manages a corresponding terminal while receiving IMD interference, and performs operation 1950.

[0169] Operation 1950 is an operation in which a service cell (or cell group) with limited scheduling and resource allocation limits resource allocation of each resource based on a resource allocation mode previously determined for a corresponding terminal. In this operation, a service cell (or cell group) with limited scheduling and resource allocation operates based on a resource allocation mode determined for a corresponding terminal to limit resource allocation of each resource. That is, a service cell (or cell group) with limited scheduling and resource allocation allocates UL and DL transmission-related resources of a terminal based on the determined resource allocation mode when performing terminal scheduling. That is, a service cell (or cell group) with limited scheduling and resource allocation allocates resources so that UL transmission resources and UL feedback resources for DL ​​transmission are included in the UL resources allocated in the resource allocation mode, and a service cell (or cell group) with limited scheduling and resource allocation allocates resources so that UL transmission scheduling resources, DL transmission scheduling resources, DL transmission resources, and DL feedback resources for UL transmission are included in the DL resources allocated in the resource allocation mode.

[0170] Operation 1960 is an operation of managing the corresponding terminal in a state where the serving cell (or cell group) with limited scheduling and resource allocation does not receive IMD interference. The serving cell (or cell group) with limited scheduling and resource allocation does not receive IMD interference and manages the corresponding terminal, and performs operation 1970.

[0171] Operation 1970 is an operation in which the service cell (or cell group) whose scheduling and resource allocation is restricted does not apply the resource allocation restriction based on the resource allocation mode to the corresponding terminal. The service cell (or cell group) whose scheduling and resource allocation is restricted operates so as not to restrict the resource allocation of the corresponding terminal based on the resource allocation mode. That is, despite the existence of the determined resource allocation mode, the service cell (or cell group) whose scheduling and resource allocation is restricted allocates the UL and DL transmission related resources of the terminal without being limited to the determined resource allocation mode.

[0172] Fig.19 The operations shown do not require Fig.19 If there is an intended effect of the present disclosure by changing the order of operations or omitting operations, the order of operations may be changed or operations may be omitted, and such changes or omissions may be construed as being included in the scope of the present disclosure.

[0173] Fig. 20 is a block diagram of a base station device capable of executing the present disclosure according to an embodiment of the present disclosure.

[0174] refer to Fig. 20 , the base station 2000 may be configured with a transceiver 2010, a controller 2020, a storage device 2030 and a backhaul connector 2040. The transceiver may send a signal to a terminal and receive a signal from the terminal. The signal may include control information and data. To this end, the transceiver 2010 may be configured with a radio frequency (RF) transmitter for up-converting and amplifying the frequency of the transmitted signal and an RF receiver for low-noise amplification of the received signal and down-converting the frequency of the signal. In addition, the transceiver 2010 may obtain a signal through a radio channel, may output the signal to the controller 2020, and may send a signal output by the controller 2020 through a radio channel. The backhaul connector 2040 may send a signal to another base station controlling another cell group and a core network and receive a signal from another base station controlling another cell group and a core network. The signal may include control information and data.

[0175] The controller 2020 controls the transceiver 2010 and the backhaul connector 2040 to perform the embodiments described in the present disclosure. The controller 2020 may include a resource allocation unit 2022. Specifically, the controller 2020 identifies and provides information for investigating a resource allocation mode, sends and receives information for determining a resource allocation mode together with another base station through the backhaul connector 2040, and determines the resource allocation mode based on the information for determining the resource allocation mode as described above. Thereafter, the resource allocation unit 2022 determines the resources to be allocated to the terminal based on the resource allocation mode. In addition, the controller 2020 may determine whether a plurality of frequency bands additionally used by the terminal are frequency bands where IMD interference occurs, may determine the allocation mode of resources and signals for which the allocation mode has not yet been determined, and may determine whether a resource allocation restriction based on the resource allocation mode is applied to a specific terminal. In addition, the controller 2020 may control the storage device 2030 to store the determined resource allocation mode.

[0176] Fig.21 is a block diagram of a terminal device capable of executing the present disclosure according to an embodiment of the present disclosure.

[0177] refer to Fig.21 , the terminal 2100 may be configured with a transceiver 2110, a controller 2120, and a storage device 2130. The transceiver may send signals to a base station and receive signals from a base station. The signal may include control information and data. To this end, the transceiver 2110 may be configured with an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying a received signal and down-converting the frequency of the signal. In addition, the transceiver 2110 may receive a signal through a radio channel, may output a signal to the controller 2120, and may send a signal output by the controller 2120 through a radio channel. The transceiver 2110 receives a resource allocation signal from the base station. The resource allocation signal may be information indicating UL authorization, DL allocation, and other signal transmission resources. The controller 2120 sends and receives UL and DL signals in response to the resource allocation signal.

[0178] According to one embodiment of the present disclosure, there is an effect that, through the present disclosure, in a mobile communication system supporting carrier aggregation or dual / multiple connection technology in which multiple frequency resources are used simultaneously, by controlling overall interference such as harmonic interference and IMD interference that may occur in the terminal or the base station, the transmission and reception performance of the terminal and the base station can be improved, and the data transmission and reception rate of the user terminal can be improved. In addition, according to the present disclosure, the terminal does not use PUCCH format 3 to send ACK / NACK information for DL ​​data by bundling ACK / NACK information, but can send ACK / NACK information generated for each DL subframe because the base station can ensure a sufficient amount of UL resources. When the transmission and reception of the bundled ACK / NACK information is difficult to implement, the base station implementation is facilitated, and the resources for the restricted PUCCH format 3 can be effectively used.

[0179] While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. A first base station in a wireless communication system, comprising: Transceiver; as well as A processor is connected to the transceiver and is configured to: obtaining resource information of the second base station sent by the second base station, determining a resource allocation mode based on the resource information of the second base station, Wherein, the resource allocation mode is determined by: limiting allocation of resources for UL grant, UL data corresponding to the UL grant, and downlink DL feedback information for the UL data based on that intermodulation distortion (IMD) interference will appear in a UL grant corresponding to uplink UL data when considering resource information of the second base station, and limiting allocation of resources for the DL feedback information, UL data corresponding to the DL feedback information, and UL grant corresponding to the UL data based on that IMD interference will occur in DL feedback information resources for the UL data when considering resource information of the second base station, The first base station and the second base station control different cell groups and are capable of simultaneously sending signals to and receiving signals from the terminal. The resource information of the second base station includes at least one of information indicating resources capable of uplink UL transmission of the second base station and information indicating resources capable of downlink DL transmission of the second base station.

2. The first base station according to claim 1, wherein: The processor is further configured to: determining, in case the terminal is scheduled, resources of a UL channel of the terminal to be included in the resources of a UL channel of the resource allocation pattern, and Resources of a DL channel of the terminal to be included in the resources of a DL channel of the resource allocation pattern are determined.

3. The first base station according to claim 2, in, The UL channel includes a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, wherein the PUCCH and PUSCH are located in independent resources in the time domain based on the resource allocation mode, and The DL channel includes a physical downlink channel PDCCH or a physical downlink shared channel PDSCH.

4. The first base station according to claim 1, in, The resource allocation mode includes UL transmission resources and DL transmission resources, The UL transmission resource includes at least one of a UL grant, UL data, and DL feedback information for the UL data, and The DL transmission resource is used for at least one of DL allocation, DL data and UL feedback information for the DL data.

5. The first base station according to claim 4, wherein: The processor is further configured to: determining whether the UL granted resource exists in the resource allocation pattern, In the case where the resources of the UL grant exist, the resources of the UL data corresponding to the UL grant exist based on a first predetermined timing, determining whether the DL allocated resources exist in the resource allocation pattern, and In case that the resources of the DL allocation exist, the resources of the DL data corresponding to the DL allocation and the resources of the UL feedback information for the DL data exist based on a second predetermined timing.

6. A second base station in a wireless communication system, comprising: Transceiver; as well as A processor, connected to the transceiver and configured to control: identifying resource information of the second base station, and sending the resource information used to determine the resource allocation mode to the first base station, The resource information is used by the first base station to determine the resource allocation mode by: limiting allocation of resources for UL grant, UL data corresponding to the UL grant, and downlink DL feedback information for the UL data based on that intermodulation distortion (IMD) interference will appear in a UL grant corresponding to uplink UL data when considering resource information of the second base station, and limiting allocation of resources for the DL feedback information, UL data corresponding to the DL feedback information, and UL grant corresponding to the UL data based on that IMD interference will occur in DL feedback information resources for the UL data when considering resource information of the second base station, The first base station and the second base station control different cell groups and are capable of simultaneously sending signals to and receiving signals from the terminal. The resource information of the second base station includes at least one of information indicating resources capable of uplink UL transmission of the second base station and information indicating resources capable of downlink DL transmission of the second base station.

7. A base station in a wireless communication system, comprising: Transceiver; as well as A processor is connected to the transceiver and is configured to: obtaining resource information for the first cell, determining a resource allocation mode for the second cell based on the resource information for the first cell, and scheduling the terminal based on the resource allocation mode, Wherein, the resource allocation mode is determined by: limiting allocation of resources for UL grant, UL data corresponding to the UL grant, and downlink DL feedback information for the UL data based on that intermodulation distortion IMD interference will appear in a UL grant corresponding to uplink UL data when the resource information for the first cell is considered, and limiting allocation of resources for the DL feedback information, UL data corresponding to the DL feedback information, and UL grant corresponding to the UL data based on that IMD interference will occur in DL feedback information resources for the UL data when considering the resource information for the first cell, The resource allocation pattern includes time-frequency resources capable of allocating uplink UL channels and downlink DL channels during a specific time interval, and The resource information for the first cell includes at least one of information indicating resources capable of UL transmission for the first cell and information indicating resources capable of DL transmission for the first cell.

8. The base station according to claim 7, in, The UL channels include a physical uplink control channel PUCCH and a physical uplink shared channel PUSCH, wherein the PUCCH and PUSCH are located in independent resources in the time domain based on the resource allocation mode, and The DL channel includes a physical downlink channel PDCCH and a physical downlink shared channel PDSCH.

9. The base station according to claim 7, in, The resource allocation mode includes UL transmission resources and DL transmission resources, The UL transmission resource includes at least one of a UL grant, UL data, and DL feedback information for the UL data, and The DL transmission resources include resources of at least one of DL allocation, DL data, and UL feedback information for the DL data.

10. The base station according to claim 9, wherein: The processor is further configured to: determining whether the UL granted resource exists in the resource allocation pattern, In the case where the UL granted resource exists, the UL data resource corresponding to the UL grant exists based on a first predetermined timing, determining whether the DL allocated resource exists in the resource allocation pattern, and In case that the DL allocation resources exist, resources of the DL data corresponding to the DL allocation and resources of UL feedback information for the DL data exist based on a second predetermined timing.

11. The base station according to claim 10, wherein: The processor is further configured to: determining a resource allocation mode of UL transmission resources of the base station based on the resource information, and A resource allocation mode of DL transmission resources of the base station is determined based on the resource allocation mode of the UL transmission resources.

12. The base station according to claim 11, wherein: The processor is further configured to determine an undetermined resource allocation pattern for channels and signals based on the UL transmission resources and the DL transmission resources of the base station.

13. The base station according to claim 11, wherein: The processor is further configured to: Determining, based on a resource allocation pattern of UL transmission resources of the base station, to allocate the DL allocation resources and the DL data resources to time resources in which no IMD interference is received, In a case where IMD interference is unlikely to exist in the UL feedback information resource for the DL data corresponding to the allocated DL data resource, determining to allocate the UL feedback information resource for the DL data, and In case that IMD interference may exist in the UL feedback information resources for the DL data, it is determined to limit the pre-allocated DL data resources and the corresponding DL allocation resources.

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