Base station in wireless communication system and control method thereof

Abstract

The present disclosure relates to a communication method and system for integrating a fifth generation (5G) communication system with the Internet of Things (IoT) technology to support a higher data rate than a fourth generation (4G) system. The present disclosure can be applied to smart services based on 5G communication technology and IoT-related technologies, such as smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, smart retail, security and safety services. Even if a communication service with improved quality is provided to a terminal with poor channel conditions, uplink resources can be ensured.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system and more particularly to a method and apparatus for ensuring uplink resources while providing a communication service with improved quality even for a terminal with a bad channel condition in a next generation wireless communication system. Background Art

[0002] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also called "super 4G networks" or "post-LTE systems". 5G communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., 60GHz bands) to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large antenna technologies have been discussed in 5G communication systems. In addition, in 5G communication systems, system network improvement development based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference elimination, etc. is underway. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coding modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) have been developed as advanced access technologies.

[0003] The Internet is evolving from a human-centered connection network through which humans generate and consume information to the Internet of Things (IoT), in which distributed entities such as objects exchange and process information without human intervention. The Internet of Everything (IoE), which combines big data processing technology and the like with IoT technology through connection with cloud servers, has emerged. As technical elements, such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology" and "security technology" are required to realize IOT, and recently, such as sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied. This IoT environment can provide a smart Internet technology service that creates new value for human life by collecting and analyzing data generated between connected objects. By integrating and combining existing information technology (IT) with various industrial applications, IoT can be applied to various fields, including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0004] Similarly, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine type communications (MTC), and machine-to-machine (M2M) communications can be implemented through technologies such as beamforming, MIMO, and array antennas. The application of cloud radio access networks (RANs) as the above-mentioned big data processing technology can also be considered as an example of the fusion between 5G technology and IoT technology.

[0005] Meanwhile, there is a need for a method for securing uplink resources while providing a communication service with improved quality even for a terminal whose channel condition is poor in a next-generation wireless communication system.

[0006] The above information is presented as background information only to assist with understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0007] An aspect of the present disclosure is to solve at least the above-mentioned problems and / or disadvantages and to provide at least the advantages described below. Therefore, an aspect of the present disclosure is to provide a method and apparatus for ensuring uplink resources while providing communication services with improved quality even to terminals whose channel conditions are not good.

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

[0009] According to one aspect of the present disclosure, a method for supporting a first frequency band and a second frequency band by a base station in a wireless communication system is provided. The method includes: identifying whether a terminal supports a voice service; if the terminal supports the voice service, generating a message including time slot aggregation configuration information about the second frequency band; and sending the message to the terminal through the first frequency band.

[0010] According to another aspect of the present disclosure, a base station supporting a first frequency band and a second frequency band in a wireless communication system is provided. The base station includes a transceiver and at least one processor, the at least one processor being configured to identify whether a terminal supports a voice service, and if the terminal supports the voice service, generate a message including time slot aggregation configuration information about the second frequency band, and control the transceiver to send the message to the terminal through the first frequency band.

[0011] According to the embodiments of the present disclosure, even a terminal whose channel condition is not good in a next-generation wireless communication system can secure uplink resources while providing a communication service with improved quality.

[0012] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the accompanying drawings, discloses various embodiments of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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:

[0014] Figure 1 is a flow chart showing a control method of a base station according to an embodiment of the present disclosure;

[0015] Figure 2A is a view showing a fifth generation (5G) system according to an embodiment of the present disclosure;

[0016] Figure 2B is a diagram illustrating a 5G system according to an embodiment of the present disclosure;

[0017] Figure 2CA is a diagram illustrating a 5G system according to an embodiment of the present disclosure;

[0018] Figure 2CB is a diagram illustrating a 5G system according to an embodiment of the present disclosure;

[0019] Figure 3A is a diagram illustrating time slot aggregation according to an embodiment of the present disclosure;

[0020] Figure 3B is a diagram illustrating time slot aggregation according to an embodiment of the present disclosure;

[0021] Figure 4 is a flowchart illustrating a method for allocating resources according to a channel environment in order to transmit uplink data in a first frequency band or a second frequency band according to an embodiment of the present disclosure;

[0022] Figure 5 is a flowchart illustrating a method for allocating resources according to a channel environment in order to transmit uplink data in a first frequency band or a second frequency band according to an embodiment of the present disclosure;

[0023] Figure 6 is a flowchart illustrating a detailed method for measuring a channel environment of a terminal and allocating uplink (UL) transmission resources according to an embodiment of the present disclosure;

[0024] Figure 7 is a flowchart illustrating a method for determining whether resource allocation can be performed in a first frequency band or a second frequency band according to an embodiment of the present disclosure;

[0025] Figure 8 is a flowchart illustrating a method for attempting to secure resources in a first frequency band or a second frequency band according to an embodiment of the present disclosure;

[0026] Fig. 9 is a flowchart illustrating a method for attempting to secure resources in a first frequency band or a second frequency band according to an embodiment of the present disclosure;

[0027] Fig.10 is a flow chart illustrating a method for determining a timeslot aggregation configuration by a base station according to an embodiment of the present disclosure;

[0028] Fig.11 is a flow chart showing a method for determining, by a base station, a closed time slot aggregation configuration according to an embodiment of the present disclosure;

[0029] Fig.12 is a flowchart illustrating a method for determining to maintain or change a configuration by a base station according to an embodiment of the present disclosure;

[0030] Fig.13 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure; and

[0031] Fig.14 is a block diagram illustrating a structure of a terminal according to an embodiment of the present disclosure.

[0032] Throughout the drawings, like reference numerals will be understood to refer to like parts, components, and structures. DETAILED DESCRIPTION

[0033] 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. It includes various specific details to assist in understanding, but these specific 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 brevity.

[0034] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it will be apparent 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 appended claims and their equivalents.

[0035] 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.

[0036] In the embodiments of the present disclosure, the description of the technical contents that are well known in the field to which the present disclosure belongs and are not directly related to the present disclosure will be omitted. This is to convey the subject matter of the present disclosure more clearly without obscuring the subject matter of the present disclosure due to the omission of unnecessary explanations.

[0037] For the same reason, in the accompanying drawings, the sizes and relative sizes of some components may be enlarged, omitted or briefly shown. In addition, the sizes of the various components cannot fully reflect their actual sizes. In the accompanying drawings, in each of the drawings, the same reference numerals are used for the same or corresponding elements.

[0038] By referring to the embodiments described with reference to the accompanying drawings, the advantages and features of the present disclosure and the methods for realizing these advantages and features will be apparent. However, the present disclosure is not limited to the embodiments set forth below, but can be implemented in various different forms. The contents defined in the specification (such as detailed construction and elements) are only specific details provided to help those of ordinary skill in the art to fully understand the present disclosure, and the present disclosure is limited only within the scope of the appended claims. Throughout the specification, the same or similar reference numerals represent the same or similar elements.

[0039] It should be understood that each block of the flowchart and the combination of blocks in the flowchart can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device create a device for implementing the specified function in the box of one or more flowcharts. These computer program instructions can also be stored in a computer-usable or computer-readable memory, which can instruct the computer or other programmable data processing device to act in a specific way, 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 box of one or more flowcharts. Computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on a computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide operations for performing the functions specified in one or more boxes of the flowchart.

[0040] In addition, each frame of the flow chart can represent a module, a code segment or a code portion, 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 indicated in the frame may not occur in order. For example, depending on the functions involved, two frames shown in succession can actually be executed substantially simultaneously, or sometimes these frames can be executed in reverse order.

[0041] As used in the present embodiment, "~ unit" refers to a software element or hardware element that performs a predetermined function, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). However, "~ unit" does not always have a meaning limited to software or hardware. "~ unit" can be advantageously constructed to reside in an addressable storage medium or be configured to run one or more processors. Therefore, "~ unit" can include, for example, components (such as software components, object-oriented software components, class components or 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 "~ unit" can be combined into a smaller number of components or "~ unit", or divided into a large number of components or "units". In addition, these components and "~ unit" can be implemented as one or more central processing units (CPUs) in a running device or a secure multimedia card.

[0042] Figure 1 is a flowchart illustrating a control method of a base station according to an embodiment of the present disclosure.

[0043] Reference Figure 1 First, in operation S100, the base station may identify whether the terminal supports voice service. For example, the base station may identify whether the terminal supports voice / video over new radio (hereinafter referred to as VoNR) based on terminal capability information received from the terminal.

[0044] The base station can be a next-generation base station (new radio node B, NR gNB, or NR base station) of a next-generation mobile communication system (hereinafter referred to as NR or fifth generation (5G)).

[0045] In this case, the base station may be a base station supporting a first frequency band and a second frequency band. The frequency of the first frequency band may be higher than the frequency of the second frequency band. For example, the first frequency band may be a frequency band operating in a 5G system, and the second frequency band may be a frequency band operating in a long term evolution (LTE) system.

[0046] In operation S110, if the terminal supports voice service, the base station may generate a message including time slot aggregation configuration information about the second frequency band. In this case, the second frequency band may be a frequency band for transmitting a supplementary uplink (SUL). In addition, the second frequency band may be a frequency band for performing spectrum sharing.

[0047] The operation of a supplementary uplink (SUL) has been proposed to solve the problem of a reduced cell radius due to a reduction in radio transmission distance. The NR system has a separate downlink / uplink frequency band for operating NR (in the case of a frequency division duplex (FDD) system) or a time division duplex (TDD) band for operating NR, and the NR system can share an uplink with the 4G system in the prior art. Therefore, from the point of view of the NR system, the uplink shared with the 4G system can be considered as an additional uplink, and this additional uplink is called SUL. The SUL operates at a lower center frequency than the NR band, so the uplink coverage of the NR system can be extended using the SUL.

[0048] Specifically, the frequency band of the time division duplex (TDD) of the NR system and the frequency band of the frequency division duplex (FDD) of the LTE system can be used in the SUL. For example, the frequency band of the TDD of the NR system can be in the range of a subcarrier spacing of 15kHz to 120kHz. In addition, the frequency band of the FDD of the LTE system can be in the range of a subcarrier spacing of 15kHz.

[0049] Regarding the physical uplink shared channel (PUSCH), the base station can instruct the terminal to operate NR UL / SUL in units of transmission time interval (TTI) through downlink control information (DCI). In this case, the terminal cannot operate NR UL / SUL at the same time. The terminal can select and send one of NR UL / SUL.

[0050] Regarding the Physical Uplink Control Channel (PUCCH), the base station can select and operate the NR UL / SUL carrier through RRC messages.

[0051] In addition, regarding the sounding reference signal (SRS), the base station can instruct the terminal to operate NR UL / SUL in units of TTI through downlink control information (DCI). In this case, it is necessary for the terminal to recognize whether it is impossible to simultaneously transmit NR UL / SUL.

[0052] Meanwhile, spectrum sharing is a technology capable of allocating data in the LTE band to terminals that transmit / receive data through the NR band.

[0053] Therefore, the base station may configure a frequency band for operating a spectrum shared with the terminal as the second frequency band.

[0054] Meanwhile, time slot aggregation is a method in which a base station schedules an uplink transmission resource to a terminal so that the terminal uses the same resource to send the same data at the same position in a continuous uplink time slot. For example, the base station may configure time slot aggregation so that the same data is to be continuously sent through 2, 4 or 8 continuous time slots. The configuration of time slot aggregation may be included in an RRC message. If there is no field (or information element (IE)) for time slot aggregation in the RRC message, the terminal that has received the RRC message may send the same data only once without configuring time slot aggregation during the transmission of uplink data. Therefore, if it is determined that the terminal has the ability to support voice services, the base station may generate an RRC message including information about how many time slots of the same data are to be sent for the time slot aggregation field in the second frequency band using SUL.

[0055] Therefore, if the terminal is a terminal capable of supporting VoNR services, the base station can use SUL to configure time slot aggregation so as to send uplink data in a second frequency band lower than the first frequency band operating in the NR system. In addition, the base station can generate a message including configuration information according to the above configuration.

[0056] Meanwhile, if the terminal is a terminal that cannot support the VoNR service, the base station may generate a message including only the configuration for the SUL.

[0057] In operation S120, the base station may send a message to the terminal via the first frequency band. For example, the base station may send a message to the terminal via the first frequency band operating in the NR system using a radio resource control (RRC) message.

[0058] Figure 2A , Figure 2B , Figure 2CA and Figure 2CBis a view illustrating a 5G system according to various embodiments of the present disclosure.

[0059] Reference Figure 2A , which is a diagram illustrating a non-standalone (NSA) type system, Figure 2A In the present invention, the non-standalone (NSA) type system is a coexistence system in which an LTE cell and a 5G cell coexist and are combined with each other in dual connectivity or carrier aggregation.

[0060] The terminal 200 may transmit and receive NR downlink (DL) signals and NR uplink (UL) signals to and from the gNB 210. In this case, the 5G radio unit (RU) 215 may receive a data or voice UL signal from the terminal 200 and may transmit the received data or voice UL signal to the gNB 210. In addition, the 5G RU 215 may transmit a DL signal received from the gNB 210 to the terminal 200.

[0061] In addition, the terminal 200 may transmit and receive LTE DL signals and LTE UL signals to and from the eNB 220. The 4GRU 225 may receive a data or voice UL signal from the terminal 200 and may transmit the received data or voice UL signal to the eNB 220. In addition, the 4G RU 225 may transmit an LTE DL signal received from the eNB 220 to the terminal 200.

[0062] Generally, in the NSA system, if the terminal 200 that transmits and receives general data signals exists in a weak electric field, performance may be degraded due to a bottleneck in coverage. In addition, according to the standard, the terminal 200 that transmits and receives voice data signals uses services through LTE.

[0063] Through the above configuration according to an embodiment of the present disclosure, if the terminal 200 configured with SUL sends the same data in consecutive time slots according to time slot aggregation, the 4G RU 225 transmits the SUL signal to the gNB 210.

[0064] Reference Figure 2B , in an independent 5G system, if the terminal 200 configured with SUL sends the same data in consecutive time slots through the second frequency band according to time slot aggregation, the SUL RU 217 transmits the SUL signal to the gNB 210.

[0065] Reference Figure 2CA and Figure 2CB , which are views showing a NR-NR dual connectivity (DC) 5G system. Figure 2CAAs shown, the SUL RU 217 can transmit the SUL signal to the gNB 230 operating as a master cell group (MCG). Figure 2CB As shown, the SUL RU 217 can transmit the SUL signal to the gNB 240 operating as a secondary cell group (SCG).

[0066] at the same time, Figure 3A and Figure 3B is a view showing time slot aggregation. Time slot aggregation is a method in which a base station schedules an uplink transmission resource to a terminal so that the terminal uses the same resource at the same position in consecutive uplink time slots to transmit the same data. For example, the base station can configure time slot aggregation so that the same data is to be continuously sent through 2, 4 or 8 consecutive time slots. The configuration of time slot aggregation can be included in the RRC message. If there is no field (or information element (IE)) for time slot aggregation in the RRC message, the terminal that has received the RRC message can send the same data only once without configuring time slot aggregation during the transmission of uplink data.

[0067] Figure 3A is a view illustrating time slot aggregation according to an embodiment of the present disclosure.

[0068] According to an embodiment of the present disclosure, a base station may configure time slot aggregation for a terminal using a VoNR service.

[0069] Reference Figure 3A , in the NR TDD frequency, even if a UL grant for VoNR data is sent to a terminal using VoNR, it may be difficult to ensure continuous UL time slots.

[0070] Figure 3B is a view illustrating time slot aggregation according to an embodiment of the present disclosure.

[0071] Reference Figure 3B , time slot aggregation can be configured by SUL in the second frequency band. If time slot aggregation is configured, the terminal can send the same data at the same position in consecutive UL time slots. In this case, the terminal can send data in 2, 4 or 8 consecutive UL time slots.

[0072] at the same time, Figure 4 and Figure 5 is a flowchart illustrating a method for allocating resources according to a channel environment in order to transmit uplink data in a first frequency band or a second frequency band according to various embodiments of the present disclosure.

[0073] Figure 4 is a flowchart illustrating a method for allocating resources according to a channel environment in order to transmit uplink data in a first frequency band or a second frequency band according to an embodiment of the present disclosure.

[0074] Reference Figure 4 , first of all, in Figure 4 In operation S400, the base station may measure the channel environment for the NR terminal.

[0075] For example, the operation of measuring the channel environment can be a step of determining whether the terminal is present in a weak electric field. In this case, the base station can determine whether the terminal is present in a weak electric field (e.g., whether the terminal is a weak electric field terminal) based on at least one of the block error rate (BLER) of the terminal, the modulation coding rate (MCS), and the maximum transmission block size (TBS).

[0076] In operation S410, the base station may determine whether it is necessary to allocate UL to the terminal in the second frequency band based on the measured channel environment.

[0077] Specifically, if the BLER of the terminal is equal to or higher than the threshold and the values ​​of the MCS and the maximum TBS are respectively lower than the threshold, the base station can determine that the terminal is a weak electric field terminal. For example, if the BLER of the terminal is equal to or greater than 0.1%, the MCS is less than 2, and the TBS is less than 48, the base station can determine that the terminal is a weak electric field terminal. The base station can determine that a terminal that satisfies at least one of the conditions of BLER, MCS, and TBS is a weak electric field terminal without identifying all conditions.

[0078] Therefore, it can be determined that it is necessary to allocate UL in the second frequency band to the terminal determined to exist in the weak electric field.

[0079] If there is no need to allocate UL to the terminal in the second frequency band, the operation proceeds to operation S470, and the base station may allocate UL resources to the terminal in the first frequency band. For example, if it is determined that the terminal is not a weak electric field terminal, the base station may determine that it is not necessary to allocate UL to the terminal in the second frequency band. Therefore, the base station may allocate UL resources to the terminal in the first frequency band operating in the NR system.

[0080] At the same time, if it is necessary to allocate UL to the terminal in the second frequency band, in operation S420, the base station can determine whether there are allocatable resources in the second frequency band. Specifically, if it is determined that the terminal is a weak electric field terminal, the base station can determine whether there are allocatable resources in the second frequency band. For example, the base station can calculate the resource block (RB) to be allocated to the terminal based on the maximum TBS value related to the transmit power of the terminal and the buffer status report (BSR) value of the RB requested by the terminal. For example, the base station can calculate the RB required for the terminal based on the smaller value between the maximum TBS value and the BSR value. Therefore, the base station can determine whether as many resources as the calculated RBs can be allocated in the second frequency band.

[0081] If it is determined that there are allocatable resources in the second frequency band, then in operation S430, the base station may allocate resources to the terminal so as to transmit UL data in the second frequency band. For example, the base station may configure SUL for the terminal.

[0082] Meanwhile, if there are no allocatable resources in the second frequency band, the base station may determine whether the terminal is using the VoNR service in operation S440.

[0083] If the result of the determination is that the terminal does not use the VoNR service, the operation proceeds to operation S470, and the base station may allocate UL resources to the terminal in the first frequency band.

[0084] Meanwhile, if the result of the determination is that the terminal is using the VoNR service, in operation S450, the base station may attempt to ensure resources in the second frequency band. In order to prevent the call quality of the VoNR service of the weak electric field terminal from deteriorating, if it is determined that the weak electric field terminal uses the VoNR service, the base station may attempt to ensure available resources in the second frequency band. The method for ensuring available resources will be described below.

[0085] In operation S460, if it is determined that there are allocatable resources in the second frequency band, the operation proceeds to operation S430, and the base station may allocate resources to the terminal so as to send UL data in the second frequency band. In this case, according to the configuration received through the RRC message, the terminal may send continuous UL data in a predetermined number of time slots according to the time slot aggregation in the second frequency band. The predetermined number may be 2, 4, or 8. The predetermined number indicating the number of time slots (e.g., 2, 4, or 8) may be replaced by the term "operating value" hereinafter.

[0086] Meanwhile, in operation S460, if it is determined that there are no allocatable resources in the second frequency band, in operation S470, the base station may allocate UL resources to the terminal in the first frequency band.

[0087] Figure 5 is a flowchart illustrating a method for allocating resources according to a channel environment in order to transmit uplink data in a first frequency band or a second frequency band according to an embodiment of the present disclosure.

[0088] Reference Figure 5 First, in operation S500, the base station may measure a channel environment for a terminal using the second frequency band. For example, according to the SUL configuration, the base station may measure a channel environment for an NR terminal transmitting uplink data in the second frequency band operating in the LTE system.

[0089] The base station can determine whether the terminal is a weak electric field terminal. For example, the base station can determine whether the terminal is in a weak electric field (for example, whether the terminal is a weak electric field terminal) based on at least one of the block error rate (BLER) of the terminal, the modulation coding rate (MCS), and the maximum transmission block size (TBS).

[0090] In operation S510, the base station may determine whether it is necessary to allocate resources to the terminal in the first frequency band. For example, if the BLER of the terminal is lower than the threshold and the values ​​of the MCS and the maximum TBS are respectively equal to or greater than the threshold, the base station may determine that the terminal is not a weak electric field terminal. Therefore, it may be determined that the terminal determined not to be a weak electric field terminal is necessary to be allocated UL in the first frequency band.

[0091] If the result of the determination is that there is no need to allocate resources to the terminal in the first frequency band, the operation proceeds to operation S560, and the base station can allocate UL resources to the terminal in the second frequency band. For example, if it is determined that the terminal is a weak electric field terminal, the base station can determine that the terminal cannot be allocated UL in the first frequency band. Therefore, the base station can continuously configure SUL.

[0092] At the same time, if it is necessary to allocate UL to the terminal in the second frequency band, in operation S420, the base station can determine whether there are allocatable resources in the second frequency band. Specifically, if it is determined that the terminal is not a weak electric field terminal, the base station can determine whether there are allocatable resources in the first frequency band. For example, the base station can calculate the resource block (RB) to be allocated to the terminal based on the maximum TBS value related to the transmit power of the terminal and the buffer status report (BSR) value of the RB requested by the terminal. For example, the base station can calculate the RB required for the terminal based on the smaller value between the maximum TBS value and the BSR value. Therefore, the base station can determine whether as many resources as the calculated RB can be allocated in the first frequency band.

[0093] If it is determined that there are allocatable resources in the first frequency band, the base station may allocate resources to the terminal in order to transmit UL data in the first frequency band in operation S530.

[0094] At the same time, if there are no allocatable resources in the first frequency band, in operation S540, the base station may try to ensure resources in the first frequency band. For example, in order to ensure resources in SUL to cope with the situation where a weak electric field terminal uses VoNR services, preferably, the base station ensures resources for UL data of the first frequency band for terminals that are not weak electric field terminals. For example, even a terminal that is currently determined not to be a weak electric field terminal and is allocated UL resources in the NR system may need to be served on SUL. Therefore, the base station may try to ensure available resources in the first frequency band. The method for ensuring available resources will be described below.

[0095] In operation S550, if it is determined that allocatable resources exist in the first frequency band as a result of attempting to secure available resources, the operation proceeds to operation S530, and the base station may allocate resources to the terminal in order to transmit UL data in the first frequency band.

[0096] Meanwhile, if it is determined that there are no allocatable resources in the first frequency band as a result of attempting to secure available resources, the operation proceeds to operation S560, and the base station may allocate UL resources to the terminal.

[0097] Figure 6 is a flowchart illustrating a method for measuring a channel environment of a terminal and allocating UL transmission resources according to an embodiment of the present disclosure.

[0098] Reference Figure 6 , the base station can determine the Figure 6 The frequency band for uplink transmission resources to the terminal is periodically scheduled in the order shown for each terminal.

[0099] First, in operation S600, after receiving the PUSCH of the terminal, the base station may update the MCS and PHR of the terminal. The base station may periodically update at least one piece of information between the MCS and the PHR based on data received from the terminal.

[0100] In operation S610, the base station may determine whether to allocate uplink transmission resources to the terminal in the first frequency band. For example, the base station may identify whether the terminal sends and receives data in the NR frequency band.

[0101] If the result of the determination is that the uplink transmission resource is allocated to the terminal in the first frequency band, the base station may determine whether the terminal uses a voice service in operation S620. For example, by identifying that 5qi indicating the type of bearer established in the corresponding terminal is "1" (for example, in LTE, QCI 1 is VoNR) to identify whether the terminal is a terminal using the VoNR service, the base station may determine whether the terminal uses a voice service.

[0102] If the terminal is not a terminal using VoNR, then in operation S630, it can be determined whether the UL BLER of the terminal exceeds the threshold, whether the MCS is less than the threshold, and whether the condition of whether the maximum TBS is less than the threshold is continuously satisfied n times or more. In operation S630, the UL BLER threshold, the MCS threshold, and the maximum TBS threshold may be values ​​within the threshold for allocation together with the resources in the second frequency band. In addition, the base station may identify whether the three conditions of the terminal's UL BLER exceeding the threshold, the MCS being less than the threshold, and the maximum TBS being less than the threshold are all satisfied within a predetermined number of times.

[0103] If the condition at operation S630 is continuously satisfied for n times or more, uplink transmission resources can be allocated in the second frequency band. For example, if the condition at operation S630 is continuously repeated for n times or more, the base station can determine that the terminal is a weak electric field terminal. In addition, when the above conditions are repeatedly satisfied for n times or more, it can be determined that the terminal is in a weak electric field environment within the threshold time. Therefore, the base station can configure SUL for the terminal.

[0104] Meanwhile, if the condition at operation S630 is not satisfied, then at operation S660, the base station may allocate uplink transmission resources in the first frequency band to the terminal. For example, the base station may continuously allocate NR UL grants to the terminal.

[0105] In addition, if it is determined in operation S620 that the terminal is a terminal using VoNR, then in operation S650, the base station can identify whether the value corresponding to the quality of the voice service is lower than the threshold. As the VoNR quality, the quality of the MAC level can be determined based on the BLER and the number of retransmissions of the VoNR call. In addition, at a higher level, the VoNR quality can be determined based on the waiting time of the VoNR call.

[0106] If the result of the determination is that the value corresponding to the quality of the voice service is less than the threshold, uplink transmission resources are allocated in the second frequency band in operation S640, otherwise, uplink transmission resources may be allocated in the first frequency band in operation S660.

[0107] For example, if the value corresponding to the VoNR quality is less than a threshold, it can be determined that the quality of the VoNR service of the terminal is degraded. Therefore, the base station can configure SUL to the terminal. As described above, if the terminal is a terminal capable of supporting VoNR services, the base station can use slot aggregation in a second frequency band lower than the first frequency band running in the NR system using SUL to send an RRC message including a configuration for sending uplink data. Therefore, if SUL is configured to the terminal using VoNR, the terminal can send UL VoNR data according to the slot aggregation configuration.

[0108] Meanwhile, if the result of the determination is that no uplink transmission resource is allocated to the terminal in the first frequency band in operation S610, for example, if the terminal transmits uplink data on the SUL, the base station may determine whether the terminal uses a voice service in operation S670.

[0109] If the result of the determination is that the terminal uses a voice service (e.g., VoNR), then in operation S690, it may be identified whether the value corresponding to the quality of the voice service is less than a threshold value. If the result of the determination is that the value corresponding to the quality of the voice service is less than the threshold value, then in operation S640, uplink transmission resources may be allocated in the second frequency band.

[0110] If the value corresponding to the quality of the voice service is not less than the threshold, in operation S680, it can be determined whether the conditions of the terminal's UL BLER less than the threshold, the MCS exceeding the threshold, and the maximum TBS exceeding the threshold are continuously satisfied n times or more.

[0111] In operation S680, the UL BLER threshold, the MCS threshold, and the maximum TBS threshold may be values ​​outside the threshold outside the second frequency band.

[0112] For example, the value within the threshold allocated to the resource in the second frequency band (e.g., the UL BLER threshold, the MCS threshold, and the maximum TBS threshold in operation S630) is different from the value outside the threshold outside the second frequency band (e.g., the UL BLER threshold, the MCS threshold, and the maximum TBS threshold in operation S680). The reason why the value within the threshold and the value outside the threshold of the second frequency band are configured differently from each other is to prevent a ping-pong phenomenon. For example, if the value within the threshold and the value outside the threshold of the second frequency band are equal to each other, the base station may repeat resource allocation on NUL and SUL continuously in a channel environment corresponding to a boundary neighborhood of the threshold. In order to prevent this phenomenon, the value within the threshold allocated to the resource in the second frequency band and the value outside the threshold outside the second frequency band are configured differently.

[0113] If the result of the determination is that the condition of operation S680 is continuously satisfied for n times or more, then in operation S660, uplink transmission resources may be allocated in the first frequency band. For example, if the condition is repeated n times or more continuously, the base station may determine that the channel environment of the terminal is improved. Therefore, the base station may allocate a UL grant in the frequency band of the NR system to the terminal.

[0114] Meanwhile, if the result of the determination is that the condition of operation S680 is not satisfied, in operation S640, uplink transmission resources may be allocated in the second frequency band. Even in this case, if the terminal is a terminal capable of supporting VoNR services as described above, the base station uses a time slot aggregation of a second frequency band lower than the first frequency band operating in the NR system to send an RRC message including a configuration for sending uplink data, and the terminal using VoNR may use time slot aggregation to send UL VoNR data on the SUL. In addition, the terminal not using VoNR may send other general UL data on the SUL.

[0115] Figure 7 is a flowchart illustrating a method for determining whether resources can be allocated to a current terminal in a first frequency band or a second frequency band according to an embodiment of the present disclosure.

[0116] Reference Figure 7In operation S700, the base station may calculate a new physical resource block (PRB) usage rate in each predetermined time period. The predetermined time period may be 1 second or 1 millisecond. The new PRB usage rate may be a PRB usage rate of a terminal additionally allocated in the first frequency band or the second frequency band.

[0117] As described above, the base station may calculate the resource blocks (RBs) required by the terminal based on the maximum TBS value related to the transmit power of the terminal and the buffer status report (BSR) value of the resource blocks (RBs) requested by the terminal. For example, the base station may calculate the RBs required by the terminal based on the smaller value between the maximum TBS value and the BSR value. The base station may calculate the new PRB usage rate by applying a margin value to the calculated RB amount required by the terminal for the entire PRB amount in the first frequency band or the second frequency band, as shown in Formula 1 below.

[0118] (New PRB usage rate) = (Amount of RBs required by the terminal) / (Total PRB) (Margin value)

[0119] …Formula 1

[0120] In this case, the margin value may be equal to or greater than 0 and equal to or less than 1.

[0121] In operation S710, the base station may determine whether the sum of the average PRB usage rate in the specific frequency band and the calculated new PRB usage rate is less than a threshold. For example, the threshold may be 0.9 (90%). The base station may periodically update the average PRB usage rate in the specific frequency band. In addition, as in Formula 1, the new PRB usage rate is calculated based on the instantaneous traffic volume, so in order to sum equally with the existing average PRB usage rate, a margin value must be applied.

[0122] If the result of the determination is that the sum is less than the threshold, then in operation S720, the base station may determine that there are allocatable resources in the specific frequency band. For example, when the threshold is 0.9 (90%), even if the average PRB usage rate in the specific frequency band and the calculated new PRB usage rate are added, it means that the PRB usage rate is less than 90%. Therefore, the base station may determine that there is a sufficiently large margin value to allocate resources to the terminal in the specific frequency band.

[0123] Meanwhile, if the sum is not less than the threshold, the base station may determine that there are no allocatable resources in the specific frequency band in operation S730.

[0124] According to reference Figure 7 The described method for determining whether resources can be allocated in the first frequency band or the second frequency band may be calculated separately for the first frequency band and the second frequency band.

[0125] Figure 8 and Fig. 9is a flowchart illustrating a method for attempting to secure resources in a first frequency band or a second frequency band according to various embodiments of the present disclosure.

[0126] Reference Figure 8 , first, a flowchart illustrating a method for attempting to secure resources in a second frequency band according to an embodiment of the present disclosure.

[0127] In operation S800, the base station may generate a list of terminals arranged in order of good channel environment for terminals that do not use voice services. For example, the base station may determine the channel environment of at least one terminal that does not use VoNR services on SUL. The channel environment may be determined based on the NR DL reference signal received power (RSRP) or NR signal-to-noise ratio (SNR) of the terminal.

[0128] In operation S810, the base station may select a first terminal from the list. For example, the base station may select a terminal determined to have the best channel environment from the list.

[0129] In operation S820, the base station may update the PRB usage rate by subtracting the PRB usage rate of the first terminal from the PRB usage rate in the second frequency band. The PRB usage rate of the first terminal may be a value obtained by applying a margin value for a ratio of RBs allocated to the first terminal to the entire PRB amount in the second frequency band in Formula 2 below.

[0130] (PRB usage rate of the first terminal) = (RBs allocated to the first terminal) / (entire PRB) (margin value) ... Formula 2

[0131] In this case, the margin value may be equal to or greater than 0 and equal to or less than 1.

[0132] For example, it may be determined that the NR UL grant is allocated to the first terminal determined to have the best channel environment, and the PRB usage rate may be updated by subtracting the PRB usage rate of the first terminal on the SUL.

[0133] In operation S830, the base station may determine whether a sum of an updated PRB usage rate and a new PRB usage rate in the second frequency band is less than a threshold value.

[0134] The new PRB usage rate may be a PRB usage rate of a terminal to be additionally allocated in the second frequency band. The new PRB usage rate may be calculated according to Formula 1 above.

[0135] If the sum of the updated PRB usage rate and the new PRB usage rate in the second frequency band is less than the threshold, in operation S840, the base station may determine that there are allocatable resources in the second frequency band.

[0136] Meanwhile, if the sum of the updated PRB usage rate and the new PRB usage rate in the second frequency band is not less than the threshold, in operation S850, the base station may determine whether there are more terminals in the list.

[0137] If there are more terminals in the list, the base station may repeat the process starting from operation S810.

[0138] Meanwhile, if there are no more terminals in the list, the base station may determine that there are no allocatable resources in the second frequency band in operation S860.

[0139] Fig. 9 is a flowchart illustrating a method for attempting to secure resources in a first frequency band according to an embodiment of the present disclosure.

[0140] Reference Fig. 9 In operation S900, the base station may generate a list of terminals arranged in order of good channel environment for terminals that do not use voice services. For example, the base station may determine the channel environment of at least one terminal that does not use VoNR services on the SUL. The channel environment may be determined based on the NR DL reference signal received power (RSRP) or NR signal-to-noise ratio (SNR) of the terminal.

[0141] In operation S910, the base station may select a first terminal from the list. For example, the base station may select a terminal determined to have the worst channel environment from the list.

[0142] In operation S920, the base station may update the PRB usage rate by subtracting the PRB usage rate of the first terminal from the PRB usage rate in the first frequency band. The PRB usage rate of the first terminal may be a value obtained by applying a margin value to the ratio of the RB allocated to the first terminal to the entire PRB amount in the first frequency band in the above formula 2.

[0143] For example, it may be determined that the SUL is allocated to the first terminal determined to have the worst channel environment, and the PRB usage rate may be updated by subtracting the PRB usage rate of the first terminal on the NR.

[0144] In operation S930, the base station may determine whether a sum of an updated PRB usage rate and a new PRB usage rate in the first frequency band is less than a threshold value.

[0145] The new PRB usage rate may be a PRB usage rate of a terminal to be additionally allocated in the first frequency band. The new PRB usage rate may be calculated according to Formula 1 above.

[0146] If the sum of the updated PRB usage rate and the new PRB usage rate in the first frequency band is less than the threshold, in operation S940, the base station may determine that there are allocatable resources in the first frequency band.

[0147] Meanwhile, if the sum of the updated PRB usage rate and the new PRB usage rate in the first frequency band is not less than the threshold, in operation S950, the base station may determine whether there are more terminals in the list.

[0148] If there are more terminals in the list, the base station may repeat the process starting from operation S910.

[0149] Meanwhile, if there are no more terminals in the list, the base station may determine that there are no allocatable resources in the first frequency band in operation S960.

[0150] Fig.10 is a flow chart showing a method for determining a time slot aggregation configuration by a base station according to an embodiment of the present disclosure. The base station may Fig.10 The process shown is used to periodically determine whether time slot aggregation is configured.

[0151] Reference Fig.10 , first, in operation S1000, the base station may determine whether a maximum TBS of a terminal that does not configure time slot aggregation and does not use a voice service is less than a threshold.

[0152] Specifically, for terminals that do not use VoNR services, the base station can be configured to initially turn off time slot aggregation. Therefore, it is possible to determine whether to configure time slot aggregation by determining the channel environment of the terminal for which the time slot aggregation configuration is turned off. Therefore, if it is determined that the terminal is in such a channel environment, in such a channel environment, even if it is difficult to send 1RB using the MCS with the lowest amount of data that can be sent by the terminal's transmit power, the base station can still determine that the maximum TBS is less than the threshold.

[0153] If the maximum TBS of the terminal is less than the threshold, in operation S1010, the base station may determine whether the maximum TBS of the terminal is less than the threshold continuously for n times or more.

[0154] If the maximum TBS of the terminal is less than the threshold value for n or more consecutive times, the base station may determine to configure time slot aggregation for the terminal in operation S1020. For example, the base station may determine the operation value of time slot aggregation to be 2. Specifically, the base station may configure time slot aggregation so as to continuously send the same UL data through two time slots.

[0155] In addition, in operation S1030, the base station may determine whether there are allocatable resources in the second frequency band. Figure 8 In the described method, the base station may determine whether there are allocatable resources in the second frequency band.

[0156] If the result of the determination is that there are allocatable resources in the second frequency band, then in operation S1040, the base station may generate an RRC message for configuring time slot aggregation, and send the generated RRC message to the terminal. For example, the base station may include a time slot aggregation field in the RRC message to be sent to the terminal. In this case, the time slot aggregation field may include an operation value indicating how many times the terminal repeatedly sends the same data to the base station. For example, as described above, the base station may determine the operation value to be 2.

[0157] At the same time, in operation S1000, if the maximum TBS of the terminal is not less than the threshold, in operation S1010, if the maximum TBS of the terminal is not less than the threshold for n times or more in a row, or if the allocatable resources do not exist in the second frequency band in operation S1030, then in operation S1050, the base station can determine not to configure time slot aggregation.

[0158] Fig.11 is a flow chart showing a method for determining a closed time slot aggregation configuration by a base station according to an embodiment of the present disclosure. The base station may Fig.11 The process shown is used to periodically determine whether to close the time slot aggregation configuration.

[0159] Reference Fig.11 , in operation S1100, the base station may determine whether a maximum TBS of a terminal configured with time slot aggregation and not using a voice service is less than a threshold.

[0160] In order to determine whether the channel environment for the terminal configured with time slot aggregation and no longer using the voice service has been improved, the base station can determine whether the maximum TBS of the terminal is less than a threshold value. As described above, if it is determined that the terminal is in such a channel environment, in such a channel environment, even if it is difficult to send 1RB using the MCS with the lowest data amount that can be sent by the terminal's transmit power, the base station can still determine that the maximum TBS of the terminal is less than the threshold value.

[0161] If the maximum TBS of the terminal is not less than the threshold, the base station may determine whether the maximum TBS of the terminal is less than the threshold continuously for n times or more in operation S1110. The base station may continuously perform the determination of S1100 a predetermined number of times.

[0162] If the maximum TBS of the terminal is not less than the threshold value for n consecutive times or more than n times, in operation S1120, the base station may determine to disable timeslot aggregation configuration for the terminal.

[0163] Therefore, in operation S1130, the base station may generate an RRC message for closing the time slot aggregation configuration, and send the generated RRC message to the terminal. For example, the base station may generate an RRC message that does not include a time slot aggregation field. In addition, the base station may send the generated RRC message to the terminal.

[0164] In operation S1140, the base station may identify whether there are allocatable resources in the second frequency band. Figure 8 In the described method, the base station may determine whether there are allocatable resources in the second frequency band.

[0165] Meanwhile, if the maximum TBS of the terminal is less than the threshold value at operation S1100, or if the maximum TBS of the terminal is less than the threshold value for n consecutive times or more than n times at operation S1110, the base station may determine to maintain the current configuration at operation S1150. For example, it may be determined that the terminal is still a weak electric field terminal, and the configuration in which the time slot aggregation configuration is turned on may be maintained.

[0166] Fig.12 is a flowchart showing a method for determining to maintain or change a configuration by a base station according to an embodiment of the present disclosure. The base station may Fig.12 The process shown is used to periodically determine whether the configuration is maintained.

[0167] Reference Fig.12 , in operation S1200, the base station may determine whether the quality of the voice service is continuously low for the terminal that is using the voice service. For example, although VoNR is used through SUL, the terminal that is allocated uplink transmission resources on SUL may determine whether the quality of the voice service is still low. As VoNR quality, the quality of the MAC level may be determined based on the BLER and the number of retransmissions of the VoNR call. In addition, at a higher level, the VoNR quality may be determined based on the waiting time of the VoNR call.

[0168] If it is determined that the quality of the voice service is still low, the base station may change the operation value of the time slot aggregation to a higher value in operation S1210. For example, the base station may configure the operation value of the time slot aggregation to 4 by default. In addition, if it is determined in operation S1200 that the quality of the voice service is still not good, the base station may change the operation value of the time slot aggregation from 4 to 8. In addition, in the case where the operation value of the time slot aggregation is configured as 2, the base station may change it to 4.

[0169] In addition, in operation S1220, the base station may determine whether there are allocatable resources in the second frequency band. For example, if the operation value of time slot aggregation is increased, the terminal in the second frequency band may occupy more resources. Therefore, even if the operation value of time slot aggregation is increased, the base station may determine whether there are allocatable resources in the second frequency band.

[0170] If the result of the determination is that there are allocatable resources in the second frequency band based on the increase in the operation value of the time slot aggregation, the base station may configure the use of the time slot aggregation value changed to a value one level larger in operation S1230. For example, the base station may notify the terminal of the changed time slot aggregation value through an RRC message.

[0171] Meanwhile, if the result of the determination is that there is no allocatable resource in the second frequency band according to the increase in the operation value of the timeslot aggregation, the base station may determine whether the voice service of the terminal is ended in operation S1240.

[0172] If the voice service of the terminal ends, in operation S1250, the base station may determine to turn off the time slot aggregation configuration. If the time slot aggregation configuration is turned off, the amount of resources occupied by the terminal in the second frequency band may be reduced. Therefore, the operation proceeds to operation S1220, and in the case where the time slot aggregation configuration is turned off, the base station may determine whether there are allocatable resources in the second frequency band.

[0173] Meanwhile, if it is determined in operation S1200 that the quality of the voice service is still not low, the base station may determine in operation S1270 whether the operation value of the time slot aggregation exceeds 4. If the result of the determination is that the operation value of the time slot aggregation exceeds 4, the base station may change the operation value of the time slot aggregation to a value one level lower in operation S1280. For example, if it is determined that the operation value of the time slot aggregation is 8, the base station may change the operation value of the time slot aggregation to 4.

[0174] If the result of the determination is that the operation value of the time slot aggregation does not exceed 4, the operation proceeds to operation S1260, and the base station can maintain the current configuration. For example, if the operation value of the time slot aggregation is configured to 4 or 2, it means that even if the quality of the voice service is not low, the terminal is still using the voice service, so the time slot aggregation configuration can be maintained.

[0175] Fig.13 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure.

[0176] Reference Fig.13 , the base station 1300 may include a transceiver 1310 and a controller 1320 .

[0177] The transceiver 1310 is a component for transmitting and receiving signals to and from an external device. For example, the base station 1300 can transmit and receive signals to and from a terminal through the transceiver 1310.

[0178] The controller 1320 may generally control the base station 1300. For example, if the terminal supports voice service, the controller 1320 may identify whether the terminal supports voice service, generate a message including time slot aggregation configuration information about the second frequency band, and control the transceiver 1310 to send the message to the terminal through the first frequency band.

[0179] At the same time, the controller 1320 can: identify whether the channel state of the terminal meets the predetermined conditions; if the channel state of the terminal meets the predetermined conditions, determine whether there are allocatable resources in the second frequency band; if there are no allocatable resources in the second frequency band, identify whether the terminal uses voice services; and if the terminal uses voice services, try to ensure resources in the second frequency band.

[0180] In addition, the controller 1320 may allocate uplink resources in the second frequency band if there are allocatable resources in the second frequency band, and allocate uplink resources in the first frequency band if there are no allocatable resources in the second frequency band and the terminal does not use a voice service.

[0181] Meanwhile, the controller 1320 may identify whether a value corresponding to the quality of the voice service is less than a threshold value when the terminal uses the voice service, and allocate uplink resources in the second frequency band if the value corresponding to the quality of the voice service is less than the threshold value.

[0182] A value corresponding to the quality of the voice service may be determined based on a bit error rate, a number of retransmissions, and a waiting time of the voice service.

[0183] In addition, the controller 1320 can: identify whether the terminal to which uplink transmission resources are allocated in the second frequency band uses voice service; in the case where the terminal uses the second frequency band, identify whether the value corresponding to the quality of the voice service is less than a threshold value; in the case where the value corresponding to the quality of the voice service is less than the threshold value, allocate uplink resources in the second frequency band; in the case where the terminal does not use voice service or the value corresponding to the quality of the voice service is equal to or greater than the threshold value, estimate the channel environment based on the uplink bit error rate (UL BLER), modulation coding rate (MCS) and maximum transport block size modulation; and allocate uplink transmission resources to the terminal in the first frequency band or the second frequency band based on the estimation result.

[0184] The frequency of the first frequency band may be higher than the frequency of the second frequency band.

[0185] Furthermore, the second frequency band may be a frequency band for transmitting a supplemental uplink (SUL).

[0186] Meanwhile, the message may be a radio resource control (RRC) message.

[0187] The voice service may be Voice / Video over New Radio (VoNR).

[0188] Through the base station 1300 as described above, even a terminal whose channel condition is not good can secure uplink resources in the next generation wireless communication system, while providing a communication service with improved quality.

[0189] Fig.14 is a block diagram illustrating a structure of a terminal according to an embodiment of the present disclosure.

[0190] Reference Fig.14 , the terminal 1400 may include a transceiver 1410 and a controller 1420 .

[0191] The transceiver 1410 is a component for transmitting and receiving signals to and from an external device. For example, the terminal 1400 can transmit and receive signals to and from a base station through the transceiver 1410.

[0192] The controller 1420 may generally control the terminal 1400. The controller 1420 may identify a message including the timeslot aggregation configuration information received through the transceiver 1410 on the second frequency band transmitted by the base station 1300.

[0193] In addition, the controller 1420 may control the transceiver 1410 to transmit UL data based on the configuration included in the message and the received UL grant.

[0194] At the same time, the constituent elements of the base station and the terminal as described above can be implemented by software. For example, the controller of the base station and the terminal can further include flash memory or other non-volatile memory. Such non-volatile memory can store therein programs for executing various roles of the controller.

[0195] In addition, each controller of the base station and the terminal can be implemented in the form of a CPU and a random access memory (RAM). The CPU of the controller can copy the above program stored in the non-volatile memory to the RAM, and can execute the above terminal functions by executing the copied program.

[0196] The controller is responsible for controlling the configuration of the base station or terminal. The controller can be used interchangeably with the same meaning as the central processing unit, microprocessor, processor or operating system. In addition, the controller of the base station or terminal can be implemented by a single chip system (system on chip or system on chip (SOC or SoC)).

[0197] Meanwhile, the communication method of the base station or the terminal according to various embodiments described above may be encoded by software and may be stored in a non-transitory readable medium. Such a non-transitory readable medium may be installed on various devices and used by various devices.

[0198] The non-temporary readable medium is not a medium for storing data for a short time, such as a register, a cache, or a memory, but refers to a medium that stores data semi-permanently and can be read by a device. Specifically, it can be a compact disc (CD), a digital versatile disc (DVD), a hard disk, a Blu-ray disc, a universal serial bus (USB), a memory card, or a read-only memory (ROM).

[0199] 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 without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a base station supporting a supplementary uplink (SUL) carrier in a wireless communication system, the method comprising: Identify whether the terminal supports voice service; In a case where the terminal supports a voice service, sending time slot aggregation configuration information about the SUL carrier to the terminal, where the time slot aggregation configuration information about the SUL carrier includes information about the number of multiple consecutive time slots of the SUL carrier; allocating uplink resources associated with the SUL carrier to the terminal based on a channel state of the terminal; and Uplink data for the voice service is received from the terminal over a plurality of consecutive time slots of the SUL carrier according to the uplink resources.

2. The method according to claim 1, wherein: Allocating uplink resources associated with the SUL carrier to the terminal further comprises: Identifying whether the channel state of the terminal meets a predetermined condition; In a case where the channel state of the terminal satisfies the predetermined condition, determining whether there is an uplink resource that can be allocated in the frequency band of the SUL carrier; In a case where there is no uplink resource that can be allocated in the frequency band of the SUL carrier, identifying whether the terminal uses the voice service; and In a case where the terminal uses the voice service, uplink resources in the frequency band of the SUL carrier are secured based on adjustment of resource usage rates of one or more terminals that do not use the voice service.

3. The method according to claim 2, further comprising: In a case where there are uplink resources that can be allocated in the frequency band of the SUL carrier, the uplink resources are allocated in the frequency band of the SUL carrier.

4. The method according to claim 1, further comprising: In a case where the terminal uses the voice service, identifying whether a value corresponding to the quality of the voice service is less than a threshold; as well as In a case where the value corresponding to the quality of the voice service is less than the threshold, it is determined to increase the number of the plurality of consecutive time slots of the SUL carrier.

5. The method according to claim 4, wherein: The value corresponding to the quality of the voice service is determined based on the bit error rate, the number of retransmissions, and the waiting time of the voice service.

6. The method according to claim 1, wherein: The channel state of the terminal is identified based on at least one of a block error rate BLER, a modulation coding rate MCS, and a maximum transport block size of the terminal.

7. The method according to claim 2, wherein: Whether the terminal uses a voice service is identified based on information indicating a type of a bearer established for the terminal.

8. The method according to claim 2, wherein: Ensuring uplink resources in the frequency band of the SUL carrier further comprises: generating a list of one or more terminals not using the voice service; selecting a first terminal from the list; and A resource usage rate for the first terminal is subtracted from a frequency band of the SUL carrier.

9. The method according to claim 1, wherein: The timeslot aggregation configuration information is sent via a radio resource control RRC message.

10. The method according to claim 1, wherein: The voice services include Voice / Video over New Radio (VoNR).

11. A base station supporting a supplementary uplink (SUL) carrier in a wireless communication system, the base station comprising: Transceiver; as well as at least one processor, the at least one processor being configured to: Identify whether the terminal supports voice service, In a case where the terminal supports a voice service, sending, via the transceiver, time slot aggregation configuration information about the SUL carrier to the terminal, the time slot aggregation configuration information about the SUL carrier including information about the number of multiple consecutive time slots of the SUL carrier, allocating uplink resources associated with the SUL carrier to the terminal based on a channel state of the terminal, and Uplink data for the voice service is received from the terminal over a plurality of consecutive time slots of the SUL carrier via the transceiver according to the uplink resources.

12. The base station according to claim 11, wherein: To allocate uplink resources associated with the SUL carrier to the terminal, the at least one processor is further configured to: identifying whether the channel state of the terminal satisfies a predetermined condition, In a case where the channel state of the terminal satisfies the predetermined condition, determining whether there is an uplink resource that can be allocated in the frequency band of the SUL carrier, in a case where there is no uplink resource that can be allocated in the frequency band of the SUL carrier, identifying whether the terminal uses the voice service, and In a case where the terminal uses the voice service, uplink resources in the frequency band of the SUL carrier are secured based on adjustment of resource usage rates of one or more terminals that do not use the voice service.

13. The base station according to claim 12, wherein: The at least one processor is further configured to: In a case where there are uplink resources that can be allocated in the frequency band of the SUL carrier, the uplink resources are allocated in the frequency band of the SUL carrier.

14. The base station according to claim 11, wherein: The at least one processor is further configured to: In a case where the terminal uses the voice service, identifying whether a value corresponding to the quality of the voice service is less than a threshold; and In a case where the value corresponding to the quality of the voice service is less than the threshold, it is determined to increase the number of the plurality of consecutive time slots of the SUL carrier.

15. The base station according to claim 14, wherein: The value corresponding to the quality of the voice service is determined based on a bit error rate, a number of retransmissions, and a waiting time of the voice service.

16. The base station according to claim 11, wherein: The channel state of the terminal is identified based on at least one of a block error rate BLER, a modulation coding rate MCS, and a maximum transport block size of the terminal.

17. The base station according to claim 12, wherein: Whether the terminal uses a voice service is identified based on information indicating a type of a bearer established for the terminal.

18. The base station according to claim 12, wherein: To ensure uplink resources in the frequency band of the SUL carrier, the at least one processor is further configured to: generating a list of one or more terminals not using the voice service, selecting a first terminal from the list, and A resource usage rate for the first terminal is subtracted from a frequency band of the SUL carrier.

19. The base station according to claim 11, wherein: The timeslot aggregation configuration information is sent via a radio resource control RRC message.

20. The base station according to claim 11, wherein: The voice services include Voice / Video over New Radio (VoNR).

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