Scheduling method and device for fdss in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates beyond 4G communication systems such as LTE. Specifically, according to various embodiments of the present disclosure, a method performed by a base station in a wireless communication system comprises the steps of: determining frequency resource allocation to a second terminal in an SE region of a first terminal; and transmitting first scheduling information about the SE region to the first terminal and the second terminal.

Description

Scheduling method and device for FDSS in a wireless communication system

[0001] The present disclosure generally relates to a wireless communication system, and more specifically to a scheduling device and method for terminals of a base station when using the frequency domain spectrum shaping (FDSS) technique in a wireless communication system.

[0002] Looking back at the evolution of wireless communication through successive generations, technologies have been developed primarily for human-oriented services, such as voice, multimedia, and data. Following the commercialization of 5G (5th Generation) communication systems, connected devices, which have been increasing explosively, are expected to be connected to communication networks. Examples of networked objects include vehicles, robots, drones, home appliances, displays, smart sensors installed in various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve into various form factors, such as augmented reality glasses, virtual reality headsets, and holographic devices. In the 6G (6th Generation) era, efforts are underway to develop improved 6G communication systems to connect hundreds of billions of devices and objects to provide diverse services. For this reason, 6G communication systems are being referred to as "beyond 5G" systems.

[0003] In the 6G communication system predicted to be realized around 2030, the maximum transmission speed is tera (i.e., 1,000 gigabit) bps (bit per second), and the wireless latency is 100 microseconds (μsec). In other words, compared to the 5G communication system, the transmission speed in the 6G communication system is 50 times faster, and the wireless latency is reduced to one-tenth.

[0004] To achieve such high data transmission speeds and ultra-low latency, 6G communication systems are being considered for implementation in the terahertz (THz) band (e.g., the 95 gigahertz (GHz) to 3 terahertz (3THz) band). Due to more severe path loss and atmospheric absorption phenomena compared to the millimeter wave (mmWave) band introduced in 5G, the importance of technologies capable of guaranteeing signal reach, or coverage, is expected to increase in the terahertz band. As key technologies to ensure coverage, new waveforms, beamforming, and multi-antenna transmission technologies such as massive Multiple-Input and Multiple-Output (MIMO), Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas, which are superior in terms of coverage compared to RF (Radio Frequency) devices, antennas, and OFDM (Orthogonal Frequency Division Multiplexing), must be developed. In addition, new technologies such as metamaterial-based lenses and antennas, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS) are being discussed to improve the coverage of terahertz band signals.

[0005] In addition, to improve frequency efficiency and system network, development is underway in 6G communication systems for full duplex technology, in which uplink and downlink simultaneously utilize the same frequency resources at the same time; network technology that integrates satellites and HAPS (High-Altitude Platform Stations); network structure innovation technology that supports mobile base stations and enables network operation optimization and automation; dynamic spectrum sharing technology through collision avoidance based on spectrum usage prediction; AI-based communication technology that utilizes AI (Artificial Intelligence) from the design stage and internalizes end-to-end AI support functions to realize system optimization; and next-generation distributed computing technology that realizes services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high performance communication and computing resources (Mobile Edge Computing (MEC), cloud, etc.). In addition, attempts are continuing to further strengthen connectivity between devices, further optimize networks, promote the softwareization of network entities, and increase the openness of wireless communication through the design of new protocols to be used in 6G communication systems, the implementation of hardware-based security environments, the development of mechanisms for the safe utilization of data, and the development of technologies regarding privacy maintenance methods.

[0006] Due to the research and development of such 6G communication systems, it is expected that a new dimension of hyper-connected experience will become possible through the hyper-connectivity of 6G communication systems, which encompasses not only connections between objects but also connections between people and objects. Specifically, it is projected that 6G communication systems will enable the provision of services such as truly immersive eXtended Reality (XR), high-fidelity mobile holograms, and digital replicas. Furthermore, services such as remote surgery, industrial automation, and emergency response, which are provided through 6G communication systems with enhanced security and reliability, will be applied in various fields including industry, healthcare, automotive, and home appliances.

[0007] Meanwhile, for 6G networks, it is crucial to ensure stable connections for various mobile users through energy-efficient communication. In particular, waveform technology can play a vital role in reducing power consumption in various scenarios by improving the energy efficiency of mobile phones and networks. In both 4G and 5G communication, the fundamental waveform is cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM). CP-OFDM offers several advantages, including high-speed data transmission in diverse environments, the ability to provide services to multiple users simultaneously, and efficient implementation using the Discrete Fourier Transform (DFT) and Inverse Fourier Transform (IDFT). Despite these numerous advantages, CP-OFDM required a solution to address the high peak-to-average power ratio (PAPR) of the transmitted signal. Accordingly, discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) is being used, and frequency domain spectrum shaping (FDSS) techniques have been proposed as a method to lower PAPR. However, when applying FDSS filters, measures to increase the efficiency of frequency resources are required.

[0008] Meanwhile, when using FDSS-SE, the base station needs to separately inform the terminal of the spectral extension (SE) ratio value through downlink control information (DCI), etc. In addition, there is a problem in that FDSS-SE cannot be used when the terminal is at the band edge or in an area close to the band edge because the SE cannot encroach outside the band, so a solution to resolve these issues is required.

[0009] Various embodiments of the present disclosure aim to provide devices and methods capable of effectively providing services in a wireless communication system.

[0010] According to various embodiments of the present disclosure, a method performed by a base station of a wireless communication system comprises the steps of determining a frequency resource allocation for a second terminal in a spectral extension (SE) area of ​​a first terminal, and transmitting first scheduling information for the SE area to the first terminal and the second terminal, wherein the first terminal may be a frequency domain spectrum shaping (FDSS)-SE-based terminal.

[0011] According to various embodiments of the present disclosure, a method performed by a first terminal of a wireless communication system comprises the step of receiving first scheduling information for a spectral extension (SE) area of ​​the first terminal from a base station, wherein the first terminal is a frequency domain spectrum shaping (FDSS)-SE-based terminal, and the SE area may include at least a portion of the frequency resources allocated to a second terminal.

[0012] According to various embodiments of the present disclosure, a base station of a wireless communication system comprises a transceiver and at least one control unit connected to the transceiver, wherein the at least one control unit is configured to determine the allocation of frequency resources for a second terminal in a spectral extension (SE) area of ​​a first terminal and to transmit first scheduling information for the SE area to the first terminal and the second terminal, and the first terminal may be a frequency domain spectrum shaping (FDSS)-SE-based terminal.

[0013] According to various embodiments of the present disclosure, a first terminal of a wireless communication system comprises a transceiver and at least one control unit connected to the transceiver, wherein the at least one control unit is configured to receive first scheduling information for a spectral extension (SE) area of ​​the first terminal from a base station, and the first terminal is a frequency domain spectrum shaping (FDSS)-SE-based terminal, and the SE area may include at least a portion of the frequency resources allocated to a second terminal.

[0014] Various embodiments of the present disclosure aim to provide devices and methods capable of effectively providing services in a wireless communication system. More specifically, according to various embodiments of the present disclosure, when applying the Frequency Domain Spectrum Shaping-Spectrum Extension (FDSS-SE) technique, a scheduling method for efficiently using frequency resources may be provided. Additionally, specific signalings for efficient scheduling may be provided.

[0015] In addition, when FDSS-SE is used for uplink transmission of the terminal, uplink coverage can be improved by increasing the output power of the terminal's power amplifier (PA). Alternatively, energy saving of the terminal can be achieved by improving the energy efficiency of the terminal's PA.

[0016] Meanwhile, in the present disclosure, when operating FDSS-SE, the size and location of the resource to which the SE value is assigned can be adaptively selected and ruled. As the terminal selects the SE value according to the rule, separate explicit signaling for SE information between the base station and the terminal may not be required. In addition, it may be possible to operate a flexible SE that can efficiently operate FDSS-SE even at the band edge, or to operate an asymmetric SE near the band edge.

[0017] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0018] FIG. 1 illustrates an example of a wireless communication environment according to embodiments of the present disclosure.

[0019] FIG. 2 illustrates an example of the configuration of a base station in a wireless communication system according to embodiments of the present disclosure.

[0020] FIG. 3 illustrates an example of the configuration of a terminal in a wireless communication system according to embodiments of the present disclosure.

[0021] FIG. 4 illustrates a waveform for having a low PAPR (peak to average power ratio) in relation to embodiments of the present disclosure.

[0022] FIG. 5 is a block diagram illustrating the process of generating a PA output signal with applied FDSS-SE (frequency domain spectrum shaping-spectrum extension) related to embodiments of the present disclosure.

[0023] FIG. 6 illustrates PAPR evaluation results related to embodiments of the present disclosure.

[0024] FIG. 7 illustrates the frequency response of a filter in the frequency domain for applying FDSS-SE in relation to embodiments of the present disclosure.

[0025] FIG. 8 illustrates the sequence of operations of a base station for determining a resource allocation mode related to FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0026] FIG. 9 illustrates a resource allocation method in a wireless communication system according to embodiments of the present disclosure when the conditions for switching to a resource-efficient mode are not satisfied.

[0027] FIG. 10 illustrates a resource allocation method in a wireless communication system according to embodiments of the present disclosure when the conditions for switching to a resource-efficient mode are satisfied.

[0028] FIG. 11 illustrates the sequence of resource allocation operations based on the received power of an FDSS-SE terminal in a wireless communication system according to embodiments of the present disclosure.

[0029] FIG. 12 illustrates the sequence of resource allocation operations based on the received power of an FDSS-SE terminal and another terminal in a wireless communication system according to embodiments of the present disclosure.

[0030] FIG. 13 illustrates an example of overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0031] FIG. 14 illustrates another embodiment of overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0032] FIG. 15 illustrates an embodiment for determining a guard band (GB) in a wireless communication system according to embodiments of the present disclosure.

[0033] FIG. 16 illustrates another embodiment for determining GB in a wireless communication system according to embodiments of the present disclosure.

[0034] FIG. 17 illustrates an example of overlapping resource allocation between FDSS-SE terminals in a wireless communication system according to embodiments of the present disclosure.

[0035] FIG. 18 illustrates an embodiment for determining GB between FDSS-SE terminals in a wireless communication system according to embodiments of the present disclosure.

[0036] FIG. 19 illustrates another embodiment for determining GB between FDSS-SE terminals in a wireless communication system according to embodiments of the present disclosure.

[0037] FIG. 20 illustrates another embodiment for determining GB in a wireless communication system according to embodiments of the present disclosure.

[0038] FIG. 21 illustrates the configuration of signaling information for FDSS operation in a wireless communication system according to embodiments of the present disclosure.

[0039] FIG. 22 illustrates a flowchart of base station operations for overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0040] FIG. 23 illustrates a flowchart of terminal operations for overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0041] FIG. 24 illustrates the flow of terminal operation for determining a default SE or a flexible SE according to the resource allocation situation of the terminal in a wireless communication system according to embodiments of the present disclosure.

[0042] FIG. 25 illustrates an example of a default SE in a wireless communication system according to embodiments of the present disclosure.

[0043] FIG. 26 illustrates an example of a flexible SE in a wireless communication system according to embodiments of the present disclosure.

[0044] FIG. 27 visually illustrates relevant parameters for calculating a flexible SE in a wireless communication system according to embodiments of the present disclosure.

[0045] FIG. 28 illustrates a default SE area and a flexible SE area according to an inband resource block (RB) size and a start RB in a wireless communication system according to embodiments of the present disclosure.

[0046] FIG. 29 illustrates SE values ​​in a default SE area and a flexible SE area according to the in-band RB size and start RB in a wireless communication system according to embodiments of the present disclosure.

[0047] FIG. 30 illustrates the range of maximum values ​​of Flexible SE according to the in-band RB size and start RB in a wireless communication system according to embodiments of the present disclosure.

[0048] FIG. 31 illustrates a maximum SE value configurable according to the in-band RB size and start RB in a wireless communication system according to embodiments of the present disclosure.

[0049] FIG. 32 illustrates signaling between a base station and a terminal required for flexible SE operation in a wireless communication system according to embodiments of the present disclosure.

[0050] FIG. 33 illustrates the flow of terminal operation in a wireless communication system according to embodiments of the present disclosure when only an SE operable area and an SE non-operable area exist.

[0051] FIG. 34 illustrates the division of areas according to the in-band RB size and the start RB in a wireless communication system according to embodiments of the present disclosure, where only an SE operating area and an SE non-operation area exist.

[0052] FIG. 35 illustrates an example in which the left SE value is smaller than the right SE in an asymmetric SE in a wireless communication system according to embodiments of the present disclosure.

[0053] FIG. 36 illustrates an example in which the left SE is not present in an asymmetric SE in a wireless communication system according to embodiments of the present disclosure.

[0054] FIG. 37 illustrates a block diagram of a DFT-s-OFDM (discrete Fourier transform-spread-orthogonal frequency division multiplexing) receiver including FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0055] FIG. 38 illustrates the operation flow of a terminal for determining SE size and sidelobe suppression in a wireless communication system according to embodiments of the present disclosure.

[0056] FIG. 39 shows a general block diagram of a DFT-s-OFDM receiver related to embodiments of the present disclosure.

[0057] FIG. 40 shows a general block diagram of a DFT-s-OFDM receiver with non-transparent FDSS considered in a wireless communication system according to embodiments of the present disclosure.

[0058] FIG. 41 illustrates a reference carrier for sidelobe suppression in a wireless communication system according to embodiments of the present disclosure.

[0059] FIG. 42 is a table comparing Transparent FDSS and Transparent FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0060] FIG. 43 illustrates the operation between a base station and a terminal required to perform Transparent FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0061] FIG. 44 illustrates the process of a base station sharing information necessary for Transparent FDSS-SE operation with a terminal in a wireless communication system according to embodiments of the present disclosure.

[0062] FIG. 45 illustrates the process required for switching between Transparent (T) mode and Non-Transparent (NT) mode in a wireless communication system according to embodiments of the present disclosure.

[0063] FIG. 46 is a table comparing the usage conditions of NT-FDSS-SE and T-FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0064] FIG. 47 illustrates the range of allocatable resources according to SE values ​​in a wireless communication system according to embodiments of the present disclosure.

[0065] In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0066] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. A singular expression may include a plural expression unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this disclosure. Terms used in this disclosure that are defined in a general dictionary may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this disclosure. In some cases, even terms defined in this disclosure are not to be interpreted to exclude the embodiments of this disclosure.

[0067] In the various embodiments of the present disclosure described below, a hardware-based approach is described as an example. However, since the various embodiments of the present disclosure include techniques using both hardware and software, the various embodiments of the present disclosure do not exclude a software-based approach.

[0068] Terms referring to components of a device used in the following description (control unit, processor, artificial intelligence (AI) model, encoder, decoder, autoencoder (AE), neural network (NN) model, etc.) and terms referring to data (signal, feedback, report, reporting, information, parameter, value, bit, codeword, etc.) are examples provided for the convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, and other terms having similar or equivalent technical meanings may be used.

[0069] Additionally, the present disclosure describes various embodiments using terms used in some communication standards (e.g., 3GPP (3rd Generation Partnership Project)), but this is merely illustrative. Various embodiments of the present disclosure can be easily modified and applied to other communication systems.

[0070] In the present disclosure, the downlink channel may be either a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH). In the present disclosure, the uplink channel may be either a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH). Additionally, in the present disclosure, uplink data may be data transmitted and / or received over the uplink channel described above, and downlink data may be data transmitted and / or received over the downlink channel described above.

[0071] FIG. 1 illustrates a wireless communication system according to various embodiments of the present disclosure. FIG. 1 illustrates a base station (110), a terminal (120), and a terminal (130) as part of nodes utilizing a wireless channel in a wireless communication system. FIG. 1 illustrates only one base station, but other base stations identical or similar to the base station (110) may be additionally included.

[0072] A base station (110) is a network infrastructure that provides wireless access to terminals (120, 130). The base station (110) has coverage defined as a certain geographical area based on the distance at which it can transmit signals. In addition to being a base station, the base station (110) may be referred to as an 'access point (AP)', 'eNodeB (eNB)', 'gNodeB (gNB)', '5G node (5th generation node)', '6G node (6th generation node)', 'wireless point', 'transmission / reception point (TRP)', or other terms having an equivalent technical meaning.

[0073] Each of the terminal (120) and terminal (130) is a device used by a user and performs communication with the base station (110) via a wireless channel. In some cases, at least one of the terminal (120) and terminal (130) may be operated without user involvement. That is, at least one of the terminal (120) and terminal (130) is a device that performs machine type communication (MTC) and may not be carried by the user. Each of the terminal (120) and terminal (130) may be referred to as 'terminal', 'user equipment (UE)', 'mobile station', 'subscriber station', 'customer premises equipment (CPE)', 'remote terminal', 'wireless terminal', 'electronic device', or 'user device', or other terms having a similar or equivalent technical meaning.

[0074] A base station (110), a terminal (120), and a terminal (130) can transmit and receive wireless signals in a millimeter wave (mmWave) band (e.g., 28 GHz, 30 GHz, 38 GHz, 60 GHz, over 60 GHz, etc.). At this time, to improve channel gain, the base station (110), the terminal (120), and the terminal (130) can perform beamforming. Here, beamforming may include transmission beamforming and reception beamforming. That is, the base station (110), the terminal (120), and the terminal (130) can impart directivity to the transmission signal or the reception signal. To this end, the base station (110) and the terminal (120, 130) can select serving beams (112, 113, 121, 131) through a beam search or beam management procedure. After serving beams (112, 113, 121, 131) are selected, subsequent communication can be performed through a resource that is in a quasi-co-located (QCL) relationship with the resource that transmitted the serving beams (112, 113, 121, 131).

[0075] FIG. 2 illustrates an example of the configuration of a base station in a wireless communication system according to embodiments of the present disclosure. According to various embodiments of the present disclosure, the base station (110) may be referred to as a network for convenience. The configuration exemplified in FIG. 2 can be understood as the configuration of the base station (110). Terms such as '~unit', '~unit', etc. used below refer to a unit that processes at least one function or operation, and this may be implemented in hardware or software, or a combination of hardware and software.

[0076] Referring to FIG. 2, the base station (110) may include a wireless communication unit (210), a backhaul communication unit (220), a storage unit (230), and a control unit (240).

[0077] The wireless communication unit (210) performs functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit (210) performs a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the system. For example, when transmitting data, the wireless communication unit (210) generates complex symbols by encoding and modulating the transmitted bit sequence. Also, when receiving data, the wireless communication unit (210) restores the received bit sequence by demodulating and decoding the baseband signal. Additionally, the wireless communication unit (210) upconverts the baseband signal into an RF (radio frequency) band signal and transmits it through an antenna, and downconverts the RF band signal received through the antenna into a baseband signal.

[0078] To this end, the wireless communication unit (210) may include a transmitting filter, a receiving filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. Additionally, the wireless communication unit (210) may include a plurality of transmitting and receiving paths. Furthermore, the wireless communication unit (210) may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the wireless communication unit (210) may be composed of a digital unit and an analog unit, and the analog unit may be composed of a plurality of sub-units depending on operating power, operating frequency, etc.

[0079] The wireless communication unit (210) can transmit and receive signals. To this end, the wireless communication unit (210) may include at least one transceiver. For example, the wireless communication unit (210) can transmit a synchronization signal, a reference signal, system information, a message, control information, or data. Additionally, the wireless communication unit (210) can perform beamforming.

[0080] The wireless communication unit (210) transmits and receives signals as described above. Accordingly, all or part of the wireless communication unit (210) may be referred to as a 'transmitter', a 'receiver', or a 'transmitter / receiver'. Furthermore, in the following description, transmission and reception performed through a wireless channel are used to mean that processing as described above is performed by the wireless communication unit (210).

[0081] The backhaul communication unit (220) provides an interface for communicating with other nodes within the network. That is, the backhaul communication unit (220) converts a bit sequence transmitted from the base station (110) to other nodes, such as other connection nodes, other base stations, upper nodes, core networks, etc., into a physical signal, and converts a physical signal received from other nodes into a bit sequence.

[0082] The storage unit (230) stores data such as basic programs, application programs, and configuration information for the operation of the base station (110). The storage unit (230) may include memory. The storage unit (230) may be composed of volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory. Additionally, the storage unit (230) may provide the stored data upon request from the control unit (240).

[0083] The control unit (240) controls the overall operations of the base station (110). For example, the control unit (240) transmits and receives signals through the wireless communication unit (210) or through the backhaul communication unit (220). Additionally, the control unit (240) writes and reads data to and from the storage unit (230). Furthermore, the control unit (240) can perform the functions of a protocol stack required by the communication standard. To this end, the control unit (240) may include at least one processor.

[0084] Meanwhile, the control unit (240) can control a series of processes to enable the base station to operate according to the embodiments of the present disclosure described below. For example, the control unit (240) of the base station can control operations such as selecting an appropriate spectrum extension (SE) value according to the frequency resource location, size, and system bandwidth situation assigned to the terminal of the present disclosure; determining switching between a resource efficiency mode and an existing resource allocation mode according to the internal network traffic situation; determining the degree of overlap by considering the amount of interference when another terminal overlaps the SE part; generating and transmitting frequency domain spectrum shaping (FDSS) related signaling information from the base station to the terminal through various signaling; receiving and determining whether the terminal is capable of flexible FDSS; synchronizing and sharing SE values ​​between the terminal and the base station according to the resource block (RB) location, size, and system bandwidth (bandwidth, BW); allowing asymmetric SE to the terminal; and mutually sharing the degree of sidelobe suppression by considering the influence of interference on adjacent RBs between the base station and the terminal.

[0085] Although not illustrated in FIG. 2, according to various embodiments of the present disclosure, the base station (110) may further include a receiving device for performing embodiments of the present disclosure. Specifically, the receiving device may be included in the wireless communication unit (210) or may be included in the base station (110) separately from the wireless communication unit (210). Alternatively, the receiving device may exist outside the base station (110) and be connected to the base station (110) wirelessly or via a wire. In this case, the receiving device may include at least one receiver. Additionally, the control unit (240) may control the receiving device to perform embodiments of the present disclosure below.

[0086] The configuration of the base station (110) shown in FIG. 2 is merely one example of a base station, and the examples of base stations for performing various embodiments of the present disclosure are not limited to the configuration shown in FIG. 2. That is, depending on various embodiments, some configurations may be added, deleted, or changed.

[0087] In FIG. 2, the base station is described as a single entity, but the present disclosure is not limited thereto. A base station according to various embodiments of the present disclosure may be implemented to form an access network having a distributed deployment as well as an integrated deployment. According to one embodiment, the base station may be distinguished into a central unit (CU) and a digital unit (DU), wherein the CU may be implemented to perform upper layer functions (e.g., radio link control (RLC), packet data convergence protocol (PDCP), and radio resource control (RRC)), and the DU may be implemented to perform lower layer functions (e.g., medium access control (MAC), physical (PHY)). The DU of the base station may form beam coverage on a radio channel.

[0088] FIG. 3 illustrates the configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure. The configuration exemplified in FIG. 3 can be understood as the configuration of a terminal (120). Terms such as ‘~part’, ‘~unit’ used below refer to a unit that processes at least one function or operation, and this may be implemented in hardware or software, or a combination of hardware and software.

[0089] Referring to FIG. 3, the terminal includes a communication unit (310), a storage unit (320), and a control unit (330).

[0090] The communication unit (310) performs functions for transmitting and receiving signals through a wireless channel. For example, the communication unit (310) performs a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the system. For example, when transmitting data, the communication unit (310) generates complex symbols by encoding and modulating the transmitted bit sequence. Also, when receiving data, the communication unit (310) restores the received bit sequence by demodulating and decoding the baseband signal. Additionally, the communication unit (310) upconverts the baseband signal into an RF band signal and transmits it through an antenna, and downconverts the RF band signal received through the antenna into a baseband signal. For example, the communication unit (310) may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc.

[0091] Additionally, the communication unit (310) may include a plurality of transmission and reception paths. Furthermore, the communication unit (310) may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the communication unit (310) may be composed of a digital circuit and an analog circuit (e.g., a radio frequency integrated circuit (RFIC)). Here, the digital circuit and the analog circuit may be implemented as a single package. Additionally, the communication unit (310) may include a plurality of RF chains. Furthermore, the communication unit (310) may perform beamforming.

[0092] The communication unit (310) transmits and receives signals as described above. Accordingly, all or part of the communication unit (310) may be referred to as a 'transmitter', a 'receiver', or a 'transmitter / receiver'. Additionally, in the following description, transmission and reception performed via a wireless channel are used to mean that processing as described above is performed by the communication unit (310).

[0093] The storage unit (320) stores data such as basic programs, application programs, and setting information for the operation of the terminal. The storage unit (320) may be composed of volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory. Additionally, the storage unit (320) provides the stored data upon the request of the control unit (330).

[0094] The control unit (330) controls the overall operations of the terminal. For example, the control unit (330) transmits and receives signals through the communication unit (310). Additionally, the control unit (330) writes and reads data to and from the storage unit (320). Furthermore, the control unit (330) can perform the functions of the protocol stack required by the communication standard. To this end, the control unit (330) may include at least one processor or microprocessor, or be part of a processor. Additionally, part of the communication unit (310) and the control unit (330) may be referred to as a communication processor (CP).

[0095] According to various embodiments, the control unit (330) may control the terminal to perform operations according to various embodiments described below. For example, the control unit (330) may control operations such as determining whether to use a default SE or a flexible SE according to the RB position, size, system bandwidth, etc. of the present disclosure, applying an SE length according to the determination, applying an asymmetric SE, and applying an SE to the signal after a discrete Fourier transform (DFT) according to a rule.

[0096] Terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, terms referring to various identification information, etc., are examples provided for the convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used.

[0097] The configuration of the terminal (120) shown in FIG. 3 is merely an example of a terminal, and the examples of terminals performing various embodiments of the present disclosure are not limited to the configuration shown in FIG. 3. That is, depending on various embodiments, some configurations may be added, deleted, or changed.

[0098] Meanwhile, DFT-S-OFDM (discrete Fourier transform-spread-orthogonal frequency division multiplexing) is a method of transmitting a complex symbol by spreading it across multiple subcarriers instead of a single subcarrier to prevent high peak power from occurring in the conventional CP (cyclic prefix)-OFDM method. Therefore, subcarrier overlap can be reduced, and the peak power of the OFDM waveform can be reduced, similar to single-carrier transmission. The FDSS technique proposed herein is a method of applying an FDSS filter to lower the PAPR (peak to average power ratio) in a DFT-S-OFDM system. Furthermore, the FDSS-SE (spectrum extension) technique is a method to concentrate the signal energy within the main lobe of each pulse by utilizing additional bandwidth. Hereinafter, the present disclosure presents a method for efficiently utilizing additional frequency resources resulting from the expansion of frequency resources when reducing PAPR using the FDSS-SE technique described above.

[0099] FIG. 4 illustrates a waveform for having a low PAPR related to embodiments of the present disclosure.

[0100] Figure 4(a) illustrates the relationship between PAPR and power efficiency (η), where a high PAPR can have a significant impact on the efficiency of the power amplifier (PA). Figure 4(a) shows the relationship between the input signal power (P_in) and the output signal power (P_out) of the PA. For example, if the output signal has a high PAPR, output back-off may be required to ensure the PA operates linearly. In this case, output back-off may decrease as the PAPR decreases. Additionally, coverage may be improved as the PA output power P_out,avg increases. Furthermore, the PA efficiency η_avg may increase. Therefore, as the PAPR of the PA output signal in the waveform decreases, coverage and PA efficiency may be improved.

[0101] Figure 4(b) shows the change in PAPR values ​​according to the modulation and coding scheme (MCS) level of waveforms with CP-OFDM and DFT-s-OFDM applied. For example, when changing from a CP-OFDM scheme using quadrature phase shift keying (QPSK) to a DFT-s-OFDM scheme using quadrature amplitude modulation (64 QAM), a gain of 2 dB may occur. Additionally, the PAPR of DFT-s-OFDM using binary phase shift keying (π / 2-BPSK) can have a value of 5.8 dB when Pr is 10^-2. Therefore, while the minimum PAPR of a 5G NR waveform may be 5.8 dB, it may still be too high to improve the performance of cell edge terminals or to apply to potential 6G use cases such as non-terrestrial networks (NTN) or the Internet of Things (IoT).

[0102] Accordingly, methods for applying an FDSS filter to DFT-s-OFDM can be described below, and specifically explained in Fig. 5.

[0103] FIG. 5 is a block diagram illustrating the process of generating a PA output signal with FDSS-SE applied in relation to embodiments of the present disclosure.

[0104] Referring to Fig. 5(a), The structure of a transmitter using / 2-BPSK FDSS-SE can be shown. Additionally, FIG. 5(b) represents the operation of each block constituting the transmitter of FIG. 5(a) as a matrix product. Specifically, the modulated symbol vector to be transmitted by the transmitter is It is, and its size is Ida (510). vector of M-point DFT spreading can be applied to, where the DFT matrix is and its size is (520). At this time, the DFT matrix is a diagonal matrix and vector It can be represented as a matrix product of.

[0105] And the vectors corresponding to M subcarriers can be converted into signals mapped to L subcarriers. Specifically, S / 2 subcarriers at both ends of a vector of size M are copied and added to the opposite ends respectively, so that L=M+S can be satisfied (530). Here, the parts corresponding to S / 2 subcarriers at both ends can be called SE (or SE region), and a matrix expanded to size L is the identity matrix It can be a symmetric extension of. Subsequently, the symbol vectors corresponding to the L subcarriers are on the frequency axis size and can be multiplied component-wise (540). Here, It can be referred to as FDSS due to its effect. By selecting a suitable FDSS filter, the transmitter can lower the PAPR of the transmitted signal without inter-symbol interference.

[0106] The transmitter maps signals corresponding to L subcarriers to which FDSS is applied to the subcarriers to which it intends to transmit ( ) can (550). And, the transmitter performs an IFFT (inverse fast Fourier transform) ( After ), you can attach CP( )(560, 570). After that, the data to be sent can be transmitted through a DAC (digital-to-analog converter) and a PA (580, 590).

[0107] FIG. 6 illustrates PAPR evaluation results related to embodiments of the present disclosure.

[0108] Referring to Fig. 6, the complementary cumulative distribution function (CCDF) of PAPR is plotted when FDSS is not applied to the PAPR of the data, or when an FDSS filter (e.g., P_0.335' or HSP (half sine pulse)) is applied. For example, when Pr is 10^-2, the DFT-s-OFDM without FDSS can show a value of 5.6 dB, whereas in the case of P_0.335', ​​a lower PAPR can be obtained as the SE ratio increases. Additionally, when an HSP filter is applied, a lower PSPR can be obtained, and when SE is 50% or more, the PAPR can have a value close to 0 (e.g., less than 1 dB). Therefore, referring to Fig. 6, it can be seen that PAPR decreases as the SE ratio increases, in addition to using FDSS.

[0109] FIG. 7 illustrates the frequency response of a filter in the frequency domain for applying FDSS-SE in relation to embodiments of the present disclosure.

[0110] Referring to FIG. 7, the response in the frequency domain can be shown when FDSS is not applied or when the SE ratio is 150% depending on the type of FDSS filter (P_0.28', P_0.335', ​​P_TRRC', or P_Half-sine Pulse'). For example, in DFT-s-OFDM without FDSS applied, outside the frequency band where the coefficient is 1, the coefficient value of the HSP filter may be relatively small compared to when other filters are applied. Therefore, the HSP filter may have a waveform that is more suitable for overlapping and allocating the SE region for other terminals (or other adjacent terminals). Accordingly, the present disclosure proposes a scheduling method for the SE region to ensure the efficiency of frequency resources.

[0111] FIG. 8 illustrates the sequence of operations of a base station for determining a resource allocation mode related to FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0112] In step 810, the base station may check whether the operating conditions of the resource efficiency mode are satisfied. The resource efficiency mode may refer to a mode in which resources for at least one other terminal (e.g., resources for uplink transmission) are allocated in overlap with the SE area of ​​an FDSS-SE terminal. For example, at least one other terminal may refer to at least one terminal adjacent to the FDSS-SE terminal among the terminals serviced by the same base station, and may be referred to as another terminal or another adjacent terminal below. Additionally, if the base station determines candidate terminals to which resources are allocated in overlap with the SE area of ​​the FDSS-SE terminal, the other terminal may be referred to as a candidate terminal. Meanwhile, the statement that uplink resources of another terminal are allocated in overlap with the SE area of ​​the FDSS-SE terminal may mean that the frequency resources allocated to the FDSS-SE terminal include not only the in-band area but also the SE area, and thus the SE area among the frequency resources allocated for the FDSS-SE terminal is allocated in overlap with resources for another terminal. In one embodiment, the condition for switching to resource efficiency mode may include cases where uplink traffic exceeds a specific value (or, including cases where it exceeds). Of course, the above condition is merely an example and is not limited thereto. Additionally, resource efficiency mode refers to a scheduling method for allocating resources in the SE area of ​​an FDSS-SE terminal to another terminal in an overlapping manner, and the above name is merely an example.

[0113] In step 820, if the conditions for switching to resource efficiency mode are satisfied (for example, if the uplink traffic of terminals serviced by the base station is above or exceeds a specific value), the base station may decide to operate in resource efficiency mode. The resource allocation method in resource efficiency mode is examined in detail below in FIG. 10.

[0114] In step 830, if the conditions for switching to resource efficiency mode are not satisfied (for example, if the uplink traffic of terminals serviced by the base station is below a certain value or less), the base station may allocate frequency resources allocated to multiple terminals in the same time resource without overlap according to the existing resource allocation mode.

[0115] FIG. 9 illustrates a resource allocation method in a wireless communication system according to embodiments of the present disclosure when the conditions for switching to a resource-efficient mode are not satisfied.

[0116] Referring to FIG. 9, if the conditions for switching to a resource efficiency mode according to step 830 of FIG. 8 described above are not satisfied, the base station may allocate frequency resources allocated to multiple terminals in the same time resource without overlap according to the existing resource allocation mode. For example, the base station may allocate multiple terminals to different resource blocks (RBs) while maintaining orthogonality. Therefore, the SE area of ​​an FDSS-SE terminal and the frequency resources allocated to other terminals may not overlap with each other.

[0117] FIG. 10 illustrates a resource allocation method in a wireless communication system according to embodiments of the present disclosure when the conditions for switching to a resource-efficient mode are satisfied.

[0118] Referring to FIG. 10, if the conditions for switching to resource efficiency mode are satisfied, the base station may decide to operate in resource efficiency mode. For example, the base station may intentionally allocate frequency resources assigned to the same time resource to each terminal in an overlapping manner. Accordingly, the base station may allocate frequency resources for other terminals within the SE area of ​​an FDSS-SE terminal. For example, for each of the two SE areas of an FDSS-SE terminal, uplink resources for different adjacent terminals may be allocated in an overlapping manner. In one embodiment, when a specific RB is assigned to an FDSS-SE terminal, another terminal may receive resources within the SE area of ​​the RB assigned to the FDSS-SE terminal and transmit data to the base station (uplink transmission). Meanwhile, the size of the frequency resource area overlapping with another terminal in the SE area may be determined by considering only the received power of the FDSS-SE terminal or by considering both the received power of the FDSS-SE terminal and the other terminal. A more specific resource allocation method is described below.

[0119] FIG. 11 illustrates the sequence of resource allocation operations based on the received power of an FDSS-SE terminal in a wireless communication system according to embodiments of the present disclosure.

[0120] Referring to FIG. 11, a base station can determine the size of the frequency resources to be allocated to another terminal in the SE area by overlapping them, taking into account only the FDSS-SE terminal. For example, the base station may allocate all or part of the SE area as resources for uplink transmission of another terminal by overlapping them, based on the received power of the FDSS-SE terminal. In one embodiment, the method of FIG. 11 may be applied when the other terminal to which the frequency resources of the SE area are to be allocated by overlapping them is not predetermined. Of course, the embodiment of FIG. 11 is not limited to cases where the other terminal is not predetermined; even when the other terminal is predetermined by the base station, the base station may perform the operation of FIG. 11 based only on the received power of the FDSS-SE terminal.

[0121] More specifically, in step 1110, the base station may determine whether the magnitude of the received power of the FDSS-SE terminal is smaller than any threshold value (e.g., Received_Power_Th). In this case, the received power of the FDSS-SE terminal may include the magnitude of the received power of the uplink signal or the magnitude of the received power of the reference signal (e.g., RSRP (reference signal received power)).

[0122] In step 1120, if the magnitude of the received power of the FDSS-SE terminal is smaller than any threshold value, the base station may allocate resources for uplink transmission of other terminals in an overlapping manner for the entire SE area of ​​the FDSS-SE terminal.

[0123] In step 1130, if the magnitude of the received power of the FDSS-SE terminal is greater than or equal to an arbitrary threshold value, the base station may allocate resources for uplink transmission of another terminal by overlapping them only to a portion of the SE area of ​​the FDSS-SE terminal. At this time, the method for determining the size of the SE area to be allocated to another terminal is described in detail below in FIG. 14.

[0124] In the above-described embodiment, the case where the magnitude of the received power of the FDSS-SE terminal is smaller than any threshold value may include the case where it is equal to any threshold value, and the inequality notation in FIG. 11 is merely an example and is not limited thereto.

[0125] FIG. 12 illustrates the sequence of resource allocation operations based on the received power of an FDSS-SE terminal and another terminal in a wireless communication system according to embodiments of the present disclosure.

[0126] Referring to FIG. 12, a base station can determine the size of the frequency resources to be allocated to another terminal in the SE area by overlapping them, taking into account both the FDSS-SE terminal and other terminals. For example, based on the received power of the FDSS-SE terminal, the base station may allocate all or part of the SE area as an overlapping resource for uplink transmission of another terminal. In one embodiment, the method of FIG. 12 may be applied in a case where other terminals to which the frequency resources of the SE area of ​​the FDSS-SE terminal are to be allocated by overlapping are predetermined, unlike FIG. 11 described above. In this case, the other terminals predetermined may be referred to as candidate terminals, and the candidate terminals may include terminals that have communicated with the base station or performed initial access prior to the resource allocation according to the present disclosure.

[0127] More specifically, in step 1210, the base station may determine whether the relative magnitude (or ratio) of the received power of the FDSS-SE terminal to the received power of the candidate terminal (e.g., received power of the FDSS-SE terminal / received power of the candidate terminal) is smaller than any threshold value (e.g., Power_Ratio_Th). In this case, the received power of the FDSS-SE terminal and the candidate terminal may include the magnitude of the received power of the uplink signal or the magnitude of the received power of the reference signal (e.g., RSRP).

[0128] In step 1220, if the relative magnitude of the received power of the FDSS-SE terminal for the candidate terminal is smaller than any threshold value, the base station may allocate resources for the uplink transmission of the candidate terminal in an overlapping manner for the entire SE area of ​​the FDSS-SE terminal.

[0129] In step 1230, if the relative magnitude of the received power of the FDSS-SE terminal for the candidate terminal is greater than or equal to an arbitrary threshold value, the base station may allocate resources for the uplink transmission of the candidate terminal in an overlapping manner only to a portion of the SE area of ​​the FDSS-SE terminal. At this time, the method for determining the size of the SE area to be allocated to the candidate terminal is described in detail below in FIG. 14.

[0130] In the above-described embodiment, the case where the relative magnitude of the received power of the FDSS-SE terminal for the candidate terminal is smaller than any threshold value may include the case where it is equal to any threshold value, and the inequality notation in FIG. 12 is merely an example and is not limited thereto.

[0131] FIG. 13 illustrates an example of overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0132] Referring to FIG. 13, an embodiment is illustrated in which, when the magnitude of the received power of an FDSS-SE terminal is smaller than any threshold value (e.g., Received_Power_Th) (e.g., step 1120 of FIG. 11) or when the relative magnitude of the received power of the FDSS-SE terminal to a candidate terminal is smaller than any threshold value (e.g., Power_Ratio_Th) (e.g., step 1220 of FIG. 12), the base station allocates the entire SE area (1310 and / or 1330) of the FDSS-SE terminal to at least one other terminal in an overlapping manner. Accordingly, descriptions that overlap with FIG. 11 or FIG. 12 may be omitted.

[0133] In one embodiment, when a first terminal (e.g., an FDSS-SE terminal) is located far from the base station and a second terminal (e.g., an FDSS terminal or a terminal that does not support FDSS) is located near the first terminal, the magnitude of the received power of the first terminal may be smaller than any threshold value (e.g., Received_Power_Th). Alternatively, the relative magnitude of the received power of the first terminal to a candidate terminal may be smaller than any threshold value (e.g., Power_Ratio_Th). Alternatively, both of the above two conditions regarding the magnitude of the received power of the first terminal may be satisfied. In this case, the base station may allocate the entire SE area (1310 and / or 1330) of the first terminal as an overlapping uplink resource for the second terminal. This is because the magnitude of the received power of the first terminal located far away is small, so even if the SE area (1310 and / or 1330) is allocated for another terminal, the likelihood of interference occurring is small. For example, the entire SE area (1310 and / or 1330) of the first terminal can be scheduled to be included in the resources for uplink transmission of the second terminal (e.g., the in-band area of ​​the second terminal). Meanwhile, other SE areas excluding the SE area allocated to the second terminal (e.g., other SE areas excluding the SE area allocated to the second terminal in overlap among the two parts of SE areas (1310 and 1330) excluding the in-band area (1320) of the first terminal) may be allocated in overlap with the uplink resources of another terminal adjacent to the base station (e.g., another candidate terminal satisfying the condition 1220 of FIG. 12 described above).

[0134] FIG. 14 illustrates another embodiment of overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0135] Referring to FIG. 14, an embodiment is illustrated in which, when the magnitude of the received power of an FDSS-SE terminal is greater than any threshold value (e.g., Received_Power_Th) (e.g., step 1130 of FIG. 11) or when the relative magnitude of the received power of the FDSS-SE terminal to a candidate terminal is greater than any threshold value (e.g., Power_Ratio_Th) (e.g., step 1230 of FIG. 12), the base station allocates only a portion of the SE area (1410 and / or 1430) of the FDSS-SE terminal to at least one candidate terminal by overlapping it. Accordingly, descriptions overlapping with FIG. 11 or FIG. 12 may be omitted.

[0136] In one embodiment, when a first terminal (e.g., an FDSS-SE terminal) is located in close proximity to a base station and a second terminal (e.g., an FDSS terminal or a terminal that does not support FDSS) is located far from the first terminal, the magnitude of the received power of the first terminal may be greater than any threshold value (e.g., Received_Power_Th). Alternatively, the relative magnitude of the received power of the first terminal to a candidate terminal may be greater than any threshold value (e.g., Power_Ratio_Th). Alternatively, both of the above-described conditions regarding the magnitude of the received power of the first terminal may be satisfied. In this case, the base station may allocate only a portion of the SE area (1410 and / or 1430) of the first terminal as an overlapping uplink resource for the second terminal. This is because, since the magnitude of the received power of the first terminal located in close proximity is large, interference may occur when allocating resources for another terminal adjacent to the in-band area (1420) of the first terminal. For example, the SE area (1410 and / or 1430) of the first terminal may include a guard band (GB) (1433) and an overlap band (OB) (1433). In this case, the GB (1433) may refer to a frequency band for protecting the first terminal in the SE area (1430) and for preventing or reducing interference caused by the overlapping allocation of resources. Accordingly, the base station may schedule the portion of the SE area (1410 and / or 1430) of the first terminal excluding the GB (1433) (e.g., OB (1433)) to overlap with the resources for uplink transmission of the second terminal.Meanwhile, a portion of another SE area excluding the SE area allocated to the second terminal (for example, another SE area excluding the SE area allocated to the second terminal in overlap among the two parts of SE areas (1410 and 1430) excluding the in-band area of ​​the first terminal) may be allocated in overlap as an uplink resource of another terminal adjacent to the base station (for example, another candidate terminal satisfying the condition 1230 of FIG. 12 described above).

[0137] In the embodiment of FIG. 14 described above, a specific method for determining the size of GB (1433) and OB (1435) within the SE area (1430) is described in detail below in FIGs. 15 and 16.

[0138] FIG. 15 illustrates an embodiment for determining GB in a wireless communication system according to embodiments of the present disclosure.

[0139] Referring to FIG. 15, when the magnitude of the received power of an FDSS-SE terminal is greater than an arbitrary threshold value (e.g., Received_Power_Th) (e.g., step 1130 of FIG. 11), a specific method for a base station to determine the magnitudes of GB and OB in the SE area of ​​the FDSS-SE terminal is described. Accordingly, descriptions that overlap with FIG. 11 or FIG. 14 may be omitted.

[0140] In one embodiment, the base station may determine the size of GB and OB based on the received power of the FDSS-SE terminal. Taking FIG. 14 described above as an example, the base station may allocate 8 RB of SE to the FDSS-SE terminal. Specifically, the base station may allocate 4 RB of SE areas to each side of the in-band area (1420) of the FDSS-SE terminal, and may determine the number of RBs (e.g., OB (1435)) to be allocated to another terminal by overlapping based on the highest frequency resource of the frequency band allocated to the FDSS-SE terminal. At this time, the candidate OBs that the base station can allocate may have a size of 1 RB to 4 RB. Accordingly, the candidate GBs that the base station can allocate may have a size of 3 RB to 0 RB. Of course, in the example described above, the case where the candidate OB is 4 RB may imply that the entire SE area of ​​the FDSS-SE terminal is allocated to another terminal by overlapping it, so the resource allocation method proposed in FIG. 15 may not need to be applied. Meanwhile, the base station can measure the cumulative interference amount occurring in the FDSS-SE terminal according to the size of the candidate OB. The base station can identify candidate OB(s) whose cumulative interference amount is smaller than an arbitrary threshold value (or interference threshold) (e.g., -110 dBm). The base station can select the candidate OB corresponding to the largest OB (or smallest GB) and the corresponding candidate GB among the candidate OBs whose cumulative interference amount is smaller than the interference threshold. Again, taking the aforementioned FIG. 14 as an example, when the interference threshold value is -110 dBm, the base station can schedule such that a GB of 2 RB (1433) is included between an OB of 2 RB (1435) that is to be allocated to the second terminal in overlap within the in-band area (1420) of the first terminal and the SE area (1430) of 4 RB.

[0141] Meanwhile, the aforementioned cumulative interference amount can be calculated based on information regarding the average received power and power spectral density (PSD) of the FDSS-SE terminal. Meanwhile, the size of the SE area and the interference threshold value described above are merely examples and may vary based on the state of the base station and the FDSS-SE terminal, and / or the relationship between the base station and the FDSS-SE terminal.

[0142] FIG. 16 illustrates another embodiment for determining GB in a wireless communication system according to embodiments of the present disclosure.

[0143] Referring to FIG. 16, when the relative magnitude of the received power of an FDSS-SE terminal with respect to another terminal (hereinafter referred to as a candidate terminal) is greater than an arbitrary threshold value (e.g., Power_Ratio_Th) (e.g., step 1230 of FIG. 12), a specific method for a base station to determine the magnitudes of GB and OB in the SE region of the FDSS-SE terminal is described. Accordingly, descriptions that overlap with FIG. 12 or FIG. 14 may be omitted.

[0144] In one embodiment, the base station may determine the size of GB and OB based on the received power of the FDSS-SE terminal and the received power of the candidate terminal. Taking FIG. 14 described above as an example, the base station may allocate 8 RB of SE to the FDSS-SE terminal. Specifically, the base station may allocate 4 RB of SE areas to each side of the in-band area (1420) of the FDSS-SE terminal, and may determine the number of RBs (e.g., OB (1435)) to be allocated to the candidate terminal by overlapping based on the highest frequency resource of the frequency band allocated to the FDSS-SE terminal. At this time, the candidate OB that the base station can allocate may have a size of 1 RB to 4 RB. Accordingly, the candidate GB that the base station can allocate may have a size of 3 RB to 0 RB. Of course, in the example described above, the case where the candidate OB is 4 RBs may imply that the entire SE region of the FDSS-SE terminal is allocated to the candidate terminal by overlapping it, so the resource allocation method proposed in FIG. 16 may not need to be applied. Meanwhile, depending on the size of the candidate OB, the base station can measure the relative size of the sum of the received power of the FDSS-SE terminal to the sum of the received power of the candidate terminal in the OB region included in the candidate terminal's in-band region (e.g., sum of received power of FDSS-SE terminal / sum of received power of candidate terminal). The base station can then identify candidate OB(s) that have a value smaller than an arbitrary threshold value (e.g., OB_Power_ratio_Th) among the measured values. Meanwhile, within the SE, the frequency domain filter coefficients can be designed to increase as they get closer to the in-band and decrease as they get further away from the in-band. Therefore, as the OB within the SE becomes smaller, the influence of the FDSS-SE terminal can be rapidly reduced. Accordingly, in the table of Fig. 16, if the candidate OB value increases, the power ratio value corresponding to the candidate OB can increase.The base station may select a candidate OB and a candidate GB that correspond to the largest OB (or the smallest GB) among candidate OBs having a measurement value for the relative size of the sum of the received power of the FDSS-SE terminal to the sum of the received power of the candidate terminal in the OB area included in the in-band area of ​​the candidate terminal that is smaller than any threshold value (e.g., -1dB). Again, taking FIG. 14 described above as an example, when the threshold value is -1dB, the base station may schedule such that a GB of 2 RB (1433) is included between the OB of 2 RB (1435) to be allocated to the second terminal in overlap within the in-band area (1420) of the first terminal and the SE area (1430) of 4 RB.

[0145] FIG. 17 illustrates an example of overlapping resource allocation between FDSS-SE terminals in a wireless communication system according to embodiments of the present disclosure.

[0146] Referring to FIG. 17, a resource allocation method is described for a case where another terminal (or candidate terminal) is an FDSS-SE terminal, unlike the cases described above in FIG. 13 and FIG. 14. In one embodiment, a first terminal (e.g., an FDSS-SE terminal) may be located far from a base station, and a second terminal (e.g., an FDSS-SE terminal) may be located relatively close to a base station. Accordingly, an in-band area (1720) and an SE area (SE1) (1710 and 1730) may be allocated to the first terminal, and an in-band area (1750) and an SE area (SE2) (1740 and 1760) may be allocated to the second terminal. In this case, the SE area (1730) of the first terminal may overlap with the SE area (1740) and / or the in-band area (1750) of the second terminal. To this end, the base station may perform scheduling by taking into account the SE area (1740) and / or in-band area (1750) of the second terminal. For example, the maximum size of the OB (1770) that the base station can allocate may correspond to the larger value between the SE area (1730) of the first terminal and the SE area (1740) of the second terminal (e.g., maxSE = max(SE1, SE2)). On the other hand, the minimum size of the OB (1770) that the base station can allocate may correspond to the smaller value between the SE area (1730) of the first terminal and the SE area (1740) of the second terminal (e.g., minSE = min(SE1, SE2)). Therefore, the base station may allocate one of the values ​​between minSE and maxSE as the OB (1770). A specific method for determining the size of the OB (1770) is described in detail below in FIGS. 18 and 19.

[0147] FIG. 18 illustrates an embodiment for determining GB between FDSS-SE terminals in a wireless communication system according to embodiments of the present disclosure.

[0148] Referring to FIG. 18, when the magnitude of the received power of a first terminal (e.g., an FDSS-SE terminal) is greater than an arbitrary threshold value (e.g., Received_Power_Th) (e.g., step 1130 of FIG. 11) and another terminal, a second terminal, is also an FDSS-SE terminal, a specific method for a base station to determine the magnitude of OB is described. Accordingly, descriptions that overlap with FIG. 11, FIG. 15, or FIG. 17 may be omitted.

[0149] In one embodiment, the base station may determine the size of the OB based on the received power of the first terminal. Taking FIG. 17 described above as an example, the base station may allocate 8 RB of SE to the first terminal. Specifically, the base station may allocate 4 RB of SE areas to each side of the in-band area (1720) of the first terminal, and may determine the number of RBs (e.g., OB (1770)) to be allocated to another terminal by overlapping based on the highest frequency resource of the frequency band allocated to the first terminal. At this time, the candidate OBs that the base station can allocate may have a size of 1 RB to 4 RB. Of course, in the example described above, if the candidate OB is 4 RB, it may mean that the entire SE area of ​​the first terminal is allocated by overlapping to another terminal, so the resource allocation method proposed in FIG. 18 may not need to be applied. Meanwhile, the base station may measure the cumulative amount of interference occurring to the first terminal according to the size of the candidate OB. And the base station can identify candidate OB(s) whose cumulative interference amount is smaller than any threshold value (or interference threshold) (e.g., -130 dBm). The base station can select the candidate OB corresponding to the largest OB among the candidate OBs whose cumulative interference amount is smaller than the interference threshold. Again, taking FIG. 17 described above as an example, when the interference threshold is -130 dBm, the base station can schedule such that a 2 RB GB is included between the SE area (1730) of the first terminal and the OB (1770) of the 2 RB to be allocated to the second terminal in overlap within the SE area (1730) of the 4 RB.

[0150] Meanwhile, as illustrated in FIG. 15, the aforementioned cumulative interference amount can be calculated based on information regarding the average received power and PSD of the FDSS-SE terminal.

[0151] FIG. 19 illustrates another embodiment for determining GB between FDSS-SE terminals in a wireless communication system according to embodiments of the present disclosure.

[0152] Referring to FIG. 19, when the relative magnitude of the received power of a first terminal (e.g., an FDSS-SE terminal) with respect to another terminal (hereinafter referred to as a candidate terminal) is greater than an arbitrary threshold value (e.g., Power_Ratio_Th) (e.g., step 1230 of FIG. 12), and the second terminal, which is a candidate terminal, is also an FDSS-SE terminal, a specific method for a base station to determine the magnitude of OB is described. Accordingly, descriptions that overlap with FIG. 11, FIG. 16, or FIG. 17 may be omitted.

[0153] In one embodiment, the base station may determine the size of the OB based on the received power of the first terminal and the second terminal. Taking FIG. 17 described above as an example, the base station may allocate 8 RB of SE to the first terminal. Specifically, the base station may allocate 4 RB of SE areas to each side of the in-band area (1720) of the first terminal, and may determine the number of RBs (e.g., OB (1770)) to be allocated to the second terminal in overlap based on the highest frequency resource of the frequency band allocated to the first terminal. At this time, the candidate OBs that the base station can allocate may have a size of 1 RB to 4 RB. Of course, in the example described above, if the candidate OB is 4 RB, it may mean that the entire SE area of ​​the FDSS-SE terminal is allocated to the second terminal in overlap, so the resource allocation method proposed in FIG. 19 may not need to be applied. Meanwhile, the base station may measure the relative magnitude of the sum of the received power of the first terminal to the sum of the received power of the second terminal in the OB area included in the in-band area of ​​the second terminal, depending on the size of the candidate OB (e.g., sum of the received power of the first terminal / sum of the received power of the second terminal). The base station may identify candidate OB(s) that have a value smaller than any threshold value (e.g., OB_Power_ratio_Th) among the measured values. The base station may select the candidate OB corresponding to the largest OB among the candidate OBs whose measured value for the relative magnitude of the sum of the received power of the first terminal to the sum of the received power of the second terminal in the OB area is smaller than any threshold value (e.g., -1dB). Again, taking the aforementioned FIG. 17 as an example, the base station can schedule such that when the threshold value is -1dB, the GB is not included (e.g., GB=0dB) within the SE area (1730) of the second terminal that overlaps with the SE area (1730) of the 4 RB, and only the OB (1770) of the 4 RB is included.

[0154] FIG. 20 illustrates another embodiment for determining GB in a wireless communication system according to embodiments of the present disclosure.

[0155] Referring to FIG. 20, according to the example of FIG. 14 described above, it may be assumed that the first terminal (e.g., FDSS-SE terminal) is a terminal located far from the base station, and the second terminal (e.g., another terminal or candidate terminal described above) is a terminal located relatively close to the base station. However, in the embodiment of FIG. 20, the second terminal may include a terminal that does not support FDSS or supports FDSS or FDSS-SE. In this case, according to the embodiments of the resource allocation method described above, when resources for uplink transmission of the second terminal are allocated in an overlapping manner in the SE area of ​​the first terminal, a method for expanding the OB area where the base station is scheduled is described.

[0156] In step 2010, the base station may determine whether the transmit power of the first terminal and / or the second terminal is adjustable or the adjustable area (or range) of the transmit power based on at least one of the power headroom (PHR) of the first terminal and / or the second terminal, current link performance (e.g., block error rate (BLER), or link quality). For example, the base station may determine how much the transmit power of the first terminal and / or the second terminal can be increased through the PHR. Alternatively, the base station may check the link performance based on the BLER and check the link quality based on at least one value of RSRP, RSSI (received signal strength indicator), or RSRQ (received signal strength quality).

[0157] In step 2020, the base station may determine whether it is necessary to expand the already allocated OB area. For example, if UL traffic increases, or if the magnitude of the received power of the first terminal decreases due to the movement of terminals, or if the relative magnitude of the received power of the first terminal decreases compared to the second terminal, the base station may determine that it is necessary to expand the already allocated OB area (reduce the GB area).

[0158] In step 2030, if the base station determines in step 2020 that it is necessary to expand the OB area already allocated, the base station may request the first terminal and / or the second terminal to adjust the transmission power. More specifically, if the transmission power of the first terminal and / or the second terminal is adjustable based on the determination in step 2010, the base station may request the first terminal and / or the second terminal to adjust the transmission power within the adjustable range. In one embodiment, the base station may request a reduction in the transmission power of the first terminal. Accordingly, as the first terminal reduces its transmission power, the degree of interference caused by the second terminal in the SE area of ​​the first terminal may be reduced. Therefore, the base station may reduce the GB in the SE area of ​​the first terminal and allocate a larger OB area. In one embodiment, the base station may request an increase in the transmission power of the second terminal. Accordingly, as the second terminal increases its transmission power, the degree of interference caused by the second terminal in the SE area of ​​the first terminal may be relatively reduced. Accordingly, the base station can reduce the GB in the SE area of ​​the first terminal and allocate the OB in a larger area. The above-described embodiments do not necessarily have to be performed individually and may be combined to form a single embodiment. However, in the above-described embodiments, the reduction of the transmission power of the first terminal or the increase of the transmission power of the second terminal may be requested only within the area (or range) determined in step 2010. Meanwhile, the request in step 2030 may be included in a TPC (transmission power control) command. Additionally, the TPC command may be included in a MAC (medium access control) CE (control element) or instructed (or set) to the terminal through a TPC field included in control information (e.g., DCI (downlink control information)).

[0159] FIG. 21 illustrates the configuration of signaling information for FDSS operation in a wireless communication system according to embodiments of the present disclosure.

[0160] Referring to FIG. 21, signaling between a base station and a terminal for overlapping resource allocation according to the embodiments described above is described. More specifically, the base station and the terminal may instruct the terminal to set (e.g., set via RRC or MAC CE) or control information (e.g., DCI) for overlapping resource allocation. Alternatively, the information required for overlapping resource allocation may be pre-set (or defined) in the base station and / or terminal. For example, the information required for overlapping resource allocation may include at least one of an in-band RB value, a total RB value, a type of FDSS filter, an SE ratio, a maximum SE ratio, whether FDSS is used, information regarding a pre-defined SE ratio per MCS, an FDSS-dedicated MCS table, a table regarding the total RB value and the in-band RB value, or a table regarding the total RB value, the in-band RB value, and the filter type.

[0161] More specifically, the in-band RB value may include the RB value of the in-band region of the frequency resource to be used for downlink reception (e.g., PDSCH) or uplink transmission (e.g., PUSCH) of the terminal. For example, the in-band RB value may be indicated by a start RB and an RB length value. The total RB value may include an RB value that includes both the in-band region and the SE region. In one embodiment, both the in-band RB value and the total RB value do not necessarily have to be transmitted to the terminal, and at least one of the information may be transmitted to the terminal. The in-band RB value and the total RB value may be indicated to the terminal through control information (e.g., DCI).

[0162] The type of FDSS filter may include information regarding the type of filter used for FDSS-SE operation. For example, the type of FDSS filter may be set or indicated through an index corresponding to each FDSS filter. The SE ratio may include information regarding the relative size of the SE area to the in-band area and may include any one of the values ​​0.125, 0.25, or 0.5. The maximum SE ratio may include the maximum value of the aforementioned SE ratio. The FDSS usage status may include information regarding whether the base station or terminal uses or supports FDSS. Meanwhile, the above-described type of FDSS filter, SE ratio, maximum SE ratio, and FDSS usage status may be set (e.g., RRC or MAC CE) or indicated (e.g., DCI), or may be pre-set (or defined) in the base station and / or terminal.

[0163] The base station may map the SE ratio according to the MCS level in a predefined (or existing FDSS operation-free) MCS table and set the mapped information to the terminal (e.g., RRC). Alternatively, an MCS table containing the mapped information may be pre-set (or defined) in the terminal. Meanwhile, an MCS table considering FDSS operation may be separately defined, and the newly defined MCS table may include at least one of the MCS Index, Modulation Order, Code Rate, or SE Ratio. The newly defined MCS table may be pre-set (defined) in the base station and may be set or instructed to the terminal regarding its use via RRC.

[0164] A table regarding total RB values ​​and in-band RB values ​​may be defined in the form of a look-up table for combinations of total RB values ​​mapped to in-band RB values. Additionally, a table regarding total RB values, in-band RB values, and filter types may be defined in the form of a look-up table for combinations of total RB values, in-band RB values, and filter types. Meanwhile, table information composed of total RB values ​​and in-band RB values, or table information composed of total RB values, in-band RB values, and filter types, may be pre-set (defined) in a base station and / or terminal.

[0165] Meanwhile, the base station may transmit the information included in FIG. 21 described above to the terminal individually, or transmit multiple pieces of information in combination. In one embodiment, the base station may instruct the terminal by combining the in-band RB value, the FDSS filter type, and the SE ratio to include all the information necessary for overlapping resource allocation according to the embodiments described above. However, as another method to reduce the overhead associated with dynamic instruction via DCI, the information necessary for overlapping resource allocation may be transmitted in the following manner.

[0166] In one embodiment, a base station may transmit information necessary for overlapping resource allocation to a terminal by combining the total RB value, whether FDSS is used, and a table regarding the total RB value and the in-band RB value. For example, if information regarding the table regarding the total RB value and the in-band RB value is in a state predefined between the base station and the terminal, the base station may instruct the terminal only the total RB value and whether FDSS is used via DCI. Accordingly, the terminal can obtain the necessary information based on the predefined table regarding the total RB value and the in-band RB value. According to the above-described embodiment, the base station may transmit information necessary for overlapping resource allocation to the terminal by using only an additional 1 bit to indicate whether FDSS is used. In this case, the type of FDSS filter may be selected by the terminal even if it is not separately set or instructed by the base station. As another example, the base station may instruct the terminal only the total RB value via DCI and set whether FDSS is used via RRC. In this case, the base station may transmit information necessary for overlapping resource allocation to the terminal without additional instructions.

[0167] In another embodiment, the base station may transmit information necessary for overlapping resource allocation to the terminal by combining the total RB value and information regarding the SE ratios predefined for each MCS or an MCS table dedicated to FDSS. For example, the base station may indicate the total RB value to be allocated to the terminal via DCI. In this case, the terminal may obtain information regarding the SE ratio corresponding to the MCS based on the DCI from the information regarding the SE ratios predefined for each MCS or an MCS table dedicated to FDSS. Therefore, the base station can deliver the necessary information to the terminal without additional DCI transmission for overlapping resource allocation.

[0168] In another embodiment, a base station can transmit information necessary for overlapping resource allocation to a terminal by combining an in-band RB value, a maximum SE ratio, and whether FDSS is used. For example, the base station can set the maximum SE ratio to the terminal via RRC. Additionally, the base station can indicate the in-band RB value allocated to the terminal and whether FDSS is used via DCI. Thus, the base station can transmit information for overlapping resource allocation to the terminal by additionally indicating only the information regarding whether FDSS is used via a 1-bit DCI.

[0169] In another embodiment, a base station may transmit information necessary for overlapping resource allocation to a terminal by combining a table regarding total RB values, in-band RB values, and filter types with an in-band RB value or a total RB value. For example, the base station may instruct the terminal to an in-band RB value or a total RB value via DCI. Accordingly, the terminal can identify the type of FDSS filter corresponding to the in-band RB value or total RB value instructed via DCI from a predefined table regarding total RB values, in-band RB values, and filter types. Therefore, the base station can transmit information for overlapping resource allocation to the terminal without additional DCI transmission to the terminal.

[0170] Of course, the types, combinations, names, corresponding values, and signaling methods of the signaling information in FIG. 21 are merely examples and are not limited to the above examples.

[0171] FIG. 22 illustrates a flowchart of base station operations for overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0172] Referring to FIG. 22, the base station operation proposed in the present disclosure is illustrated, and some or all of the various embodiments related to the overlapping resource allocation described above may be applied in the same or similar way to FIG. 22.

[0173] In step 2210, the base station may determine the allocation of frequency resources for a second terminal (e.g., a terminal that does not support FDSS, or supports FDSS or FDSS-SE) in the SE area of ​​a first terminal (e.g., an FDSS-SE terminal). For example, the base station may determine the allocation of overlapping resources in the SE area of ​​the first terminal when the uplink traffic of the first terminal and the second terminal is above any threshold value. In this case, the SE area of ​​the first terminal may include a GB to prevent or mitigate interference between the first terminal and the second terminal and an OB to which resources are allocated in overlap.

[0174] In step 2220, the base station may transmit first scheduling information regarding the SE area of ​​the first terminal to the first terminal and the second terminal. At this time, the first scheduling information may include information regarding the frequency resources of the first terminal and information related to FDSS. For example, the information regarding the frequency resources of the first terminal may include at least one of information regarding the size of the frequency resources allocated to the first terminal, the size of the in-band area, the size of the SE area, or the ratio of the SE area (to the in-band area). The information related to FDSS may include at least one of the type of FDSS filter, whether FDSS is used, and an MCS table for FDSS.

[0175] Meanwhile, although an embodiment of the operation of a base station has been described above based on the flowchart shown in FIG. 22, it is obvious that the operation of the base station may vary according to other embodiments described above.

[0176] FIG. 23 illustrates a flowchart of terminal operations for overlapping resource allocation in a wireless communication system according to embodiments of the present disclosure.

[0177] Referring to FIG. 23, the operation of a first terminal (e.g., an FDSS-SE terminal) proposed in the present disclosure is illustrated, and some or all of the various embodiments related to the overlapping resource allocation described above may be applied to FIG. 23 in the same or similar manner.

[0178] In step 2310, the first terminal may receive first scheduling information regarding the SE area of ​​the first terminal from the base station. The SE area of ​​the first terminal may include at least a portion of the frequency resources allocated to the second terminal (e.g., a terminal that does not support FDSS, or supports FDSS or FDSS-SE). For example, the SE area of ​​the first terminal may include a GB to prevent or mitigate interference between the first terminal and the second terminal, and an OB where resources are allocated in overlap. Additionally, the first scheduling information may include information regarding the frequency resources of the first terminal and information related to FDSS. For example, the information regarding the frequency resources of the first terminal may include at least one of information regarding the size of the frequency resources allocated to the first terminal, the size of the in-band area, the size of the SE area, or the ratio of the SE area (to the in-band area). The information related to FDSS may include at least one of the type of FDSS filter, whether FDSS is used, and an MCS table for FDSS.

[0179] Meanwhile, although an example of the operation of the terminal has been described above based on the flowchart illustrated in FIG. 23, it is obvious that the operation of the terminal may vary according to other examples described above.

[0180] Meanwhile, the present disclosure proposes a method for improving PAPR according to the Transparent FDSS-SE method. For example, the present disclosure allows a terminal to transmit a signal with very limited power in adjacent RB portions other than the Inband RB without indication or configuration from the base station. Accordingly, the following embodiment describes a signal transmission method using the Transparent FDSS-SE method by a terminal supporting the above-described FDSS-SE.

[0181] FIG. 24 illustrates the flow of terminal operation for determining a default SE or a flexible SE according to the resource allocation situation of the terminal in a wireless communication system according to embodiments of the present disclosure.

[0182] In step 2401, the terminal is determined by the system bandwidth of the given band. Size of Inband RB The starting RB position of the inband RB or the default SE Ratio defined in the system It can be determined whether the currently allocated resource belongs to the default SE based on at least one of the values. In this case, the terminal's judgment criterion can be determined based on the following Equation 1. The terminal determines if the inequality in Equation 1 below is true (e.g., If the value is between two boundary values, the allocated resource can be declared to belong to the default SE.

[0183] [Mathematical Formula 1]

[0184]

[0185] In step 2402, if the resource allocated in Equation 1 belongs to the default SE area, the terminal can set the SE value to the default SE as illustrated in Fig. 25 below. At this time, the final SE value Assuming that, the following mathematical equation 2 can hold.

[0186] [Mathematical Formula 2]

[0187]

[0188] In step 2403, if the resource allocated in Equation 1 belongs to the flexible SE area rather than the default SE area, the terminal can set the SE value to the flexible SE value as shown in Figure 26 below.

[0189] FIG. 25 illustrates an example of a default SE in a wireless communication system according to embodiments of the present disclosure. FIG. 26 illustrates an example of a flexible SE in a wireless communication system according to embodiments of the present disclosure. In FIG. 25 and FIG. 26, the default SE and the flexible SE are merely examples for explaining the shape of the SE region according to Equation 1 of FIG. 24 described above. Accordingly, in FIG. 25 and FIG. 26 The size and shape of the SE area, etc., are not limited by what is shown in the drawing.

[0190] FIG. 27 visually illustrates relevant parameters for calculating a flexible SE in a wireless communication system according to embodiments of the present disclosure.

[0191] Referring to FIG. 27, each parameter for calculating the flexible SE value can be visually represented as shown in FIG. 27. The square box in the center may represent the assigned Inband RB. can mean the maximum assignable SE value to the left of the assigned Inband RB, and and It can be expressed as twice the ratio of , as shown in the following mathematical formula 3.

[0192] [Mathematical Formula 3]

[0193]

[0194] one side, can refer to the maximum assignable SE value to the right of the assigned Inband RB, and the total number of assignable RBs to the right of the Inband RB (e.g., and It can be expressed as twice the ratio of , as shown in the following mathematical formula 4.

[0195] [Mathematical Formula 4]

[0196]

[0197] And the terminal can select the minimum value among the SE values ​​calculated through the above mathematical formulas 3 and 4 and calculate the final flexible SE value through the following mathematical formula 5.

[0198] [Mathematical Formula 5]

[0199]

[0200] for example, It may be set to a value smaller than the value calculated as the minimum value in mathematical formula 5.

[0201] FIG. 28 illustrates a default SE area and a flexible SE area according to an inband resource block (RB) size and a start RB in a wireless communication system according to embodiments of the present disclosure.

[0202] Referring to Fig. 28, RB, In the case of (%) (e.g., NR 5MHz BW, 15kHz subcarrier spacing), the distribution of default SE and flexible SE values ​​according to the size of start RB and Inband RB can be visually represented.

[0203] FIG. 29 illustrates SE values ​​in a default SE area and a flexible SE area according to the in-band RB size and start RB in a wireless communication system according to embodiments of the present disclosure.

[0204] Referring to FIG. 29, RB, In the case of (%), the distribution of default SE and flexible SE values ​​according to the Start RB and Inband RB sizes can be shown in a table. In one embodiment, when the Inband RB size is 1 RB to 5 RB and the Start RB is 10, a default SE of 400% can be applied in both cases. Also, as the SE is assigned to both ends of the band or the RB size increases, the SE value can be determined by the flexible SE.

[0205] In one embodiment, it may be possible to derive and operate the maximum configurable SE value under a given RB size, RB position, and system bandwidth. A given range (e.g., The maximum settable SE value within ) can be expressed as shown in the following mathematical formulas 6 to 8, with the same intent as the formulas for calculating flexible SE described above (e.g., mathematical formulas 3 to 5).

[0206] [Mathematical Formula 6]

[0207]

[0208] Mathematical Equation 6 can represent SE values ​​that can be assigned to the left area of ​​the Inband RB.

[0209] [Mathematical Formula 7]

[0210]

[0211] Mathematical Equation 7 can represent an SE value that can be assigned to the right area of ​​the Inband RB. The terminal can select the smaller value among the possible SE values ​​of the left and right areas of the Inband RB as the final SE value, and the final SE value can be represented as shown in the following Mathematical Equation 8.

[0212] [Mathematical Formula 8]

[0213]

[0214] FIG. 30 illustrates the range of maximum values ​​of Flexible SE according to the in-band RB size and start RB in a wireless communication system according to embodiments of the present disclosure. Referring to FIG. 30, the distribution of Flexible SE values ​​according to the Start RB and In-band RB sizes in the case of 5 MHz BW, 15 KHz SCS, and 25 RB can be visually represented in the same manner as FIG. 28 described above.

[0215] FIG. 31 illustrates a maximum settable SE value according to the in-band RB size and start RB in a wireless communication system according to embodiments of the present disclosure. Referring to FIG. 31, the distribution of flexible SE values ​​according to the start RB and in-band RB size in the case of 5 MHz BW, 15 KHz SCS, and 25 RB, as in FIG. 30, can be shown in a table.

[0216] FIG. 32 illustrates signaling between a base station and a terminal required for flexible SE operation in a wireless communication system according to embodiments of the present disclosure.

[0217] Referring to FIG. 32, the signaling process between a base station and a terminal required for flexible SE operation is illustrated. In step 3201, in one embodiment, the base station and the terminal may share the rules for calculating the aforementioned flexible SE (e.g., Equations 3 to 5) through a predefined process. In one embodiment, the base station may share information including a table of flexible SE settings, such as FIG. 29 or FIG. 31, with the terminal via an RRC message. In one embodiment, between the base station and the terminal, the default SE value is Values ​​can be shared through predefined processes or RRC messages.

[0218] In step 3202, the base station may request UE Capability information for the flexible SE from the terminal via an RRC message.

[0219] In step 3203, the terminal can transmit UE capability information for the flexible SE to the base station. The UE capability information can be defined as follows.

[0220] Phy-ParametersCommon ::= SEQUENCE {

[0221] ...

[0222] Flexible_SE_Capa ENUMERATED {supported / nonSupported},

[0223] }

[0224] In step 3204, the base station may transmit PUSCH resource allocation information to the terminal via DCI. The resource allocation information may include at least one of Start RB or RB size information.

[0225] In step 3205, the terminal can select an SE ratio by combining scheduling information instructed by the base station with previously shared or predefined flexible SE setting information, and can transmit FDSS-SE using the selected SE ratio. The base station may not transmit information about the SE ratio to the terminal in an explicit manner through the method described above, but may adaptively set the SE ratio value according to the assigned RB location and size by utilizing predefined rules.

[0226] FIG. 33 illustrates the flow of terminal operation in a wireless communication system according to embodiments of the present disclosure when only an SE operable area and an SE non-operable area exist.

[0227] Referring to FIG. 33, the operation of a terminal for selecting an SE operation-enabled area or an SE operation-unenabled area in a situation where the flexible SE is not operated is described.

[0228] In step 3301, the terminal is of a given RB size RB position Total system bandwidth and default SE values Based on this, the SE operable range and the SE non-operable range can be distinguished. For example, whether it falls within the SE operable range can be determined through the aforementioned Equation 1. Referring again to Equation 1, Equation 1 applies to both sides of the Inband RB It could be a condition to check whether that amount of SE has been applied.

[0229] In step 3302, if it is confirmed to be an SE operation-enabled area, the terminal can perform FDSS-SE.

[0230] In step 3303, if it is identified as an area where SE operation is not possible, the terminal may perform only FDSS without SE or perform existing DFT-s-OFDM (e.g., No FDSS).

[0231] FIG. 34 illustrates the division of areas according to the in-band RB size and the start RB in a wireless communication system according to embodiments of the present disclosure, where only an SE operating area and an SE non-operation area exist.

[0232] Referring to Fig. 34, depending on the size of the Start RB and Inband RB, the SE operable area and SE non-operable area described in step 3301 of Fig. 33 can be visually represented.

[0233] FIG. 35 illustrates an example in which the left SE value is smaller than the right SE in an asymmetric SE in a wireless communication system according to embodiments of the present disclosure.

[0234] Referring to FIG. 35, an example is described of a case where the left SE value and the right SE value are set differently during SE operation in FDSS-SE. For example, when a flexible SE is applied near the left edge of the band, a short SE must be assigned to both sides of the Inband RB due to the symmetry condition of the SE. However, as illustrated in FIG. 35, when asymmetric SE is allowed, the right side of the assigned Inband RB is assigned a default SE, and the left side of the assigned Inband RB is assigned a short SE that performs SE up to the band edge.

[0235] FIG. 36 illustrates an example in which the left SE is not present in an asymmetric SE in a wireless communication system according to embodiments of the present disclosure.

[0236] Referring to Fig. 36, an example is described where a resource is allocated in contact with the left edge of the band. In this case, the right side of the allocated Inband RB may be allocated with default SE, and the left side of the allocated Inband RB may not perform SE.

[0237] FIGS. 35 and 36 illustrate examples where the left side of the assigned Inband RB is adjacent to or touches the band edge, but it goes without saying that the same applies when the right side of the assigned Inband RB is adjacent to or touches the band edge.

[0238] FIG. 37 illustrates a block diagram of a DFT-s-OFDM receiver including FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0239] Referring to FIG. 37, the explanation is based on the transmitter structure for FDSS-SE identical to that described above in FIG. 5. Specifically, while in FIG. 5, Q representing the SE ratio is less than 2, so a structure in which the inband signal repeats cyclically does not appear, FIG. 37 may include cases where the SE ratio Q is 2 or greater, as illustrated in 3701. First, M modulated symbols are It can be expressed as follows. The frequency domain signal after M-point DFT spreading can be represented as shown in the following mathematical equation 9.

[0240] [Mathematical Formula 9]

[0241]

[0242] Subsequently, M frequency domain signals Spectral extension can be performed on L frequency domain signals and can be expressed as Equation 10.

[0243] [Mathematical Formula 10]

[0244]

[0245] In mathematical formula 10, And, is, is a modular operation It can mean the remainder when divided by M. Also, in the case of a symmetric extension It can be. On the other hand, in the case of a simple extension It could be. It can also be expressed identically through a mapping function as shown in the following mathematical equation 11.

[0246] [Mathematical Formula 11]

[0247]

[0248] In mathematical formula 11, In order to implement the same as above using the mapping function It can be set to, and S can be the same as mathematical formula 10.

[0249] A Spectrum Shaping Filter of length L can use a Shaping Filter that is determined by a rule or corresponds to an index instructed by the base station to the terminal. For example, when using an HSP-based shaping filter, it can be expressed as shown in the following Equation 12.

[0250] [Mathematical Formula 12]

[0251]

[0252] In mathematical formula 12 may be a parameter for controlling sidelobe suppression corresponding to the power of the SE portion in an HSP filter. For example, As this becomes smaller, more sidelobe suppression can be performed. It has the characteristic of maintaining symmetry in the frequency axis, which allows the shape of interference affecting adjacent RBs to be uniform.

[0253] Equation 13 below specifically expresses the 3701 step (spectral extension). The total number of subcarriers L=(1+Q)M after applying the aforementioned SE can be expressed as Equation 13 below.

[0254] [Mathematical Formula 13]

[0255]

[0256]

[0257]

[0258] In mathematical formula 13, silver It can represent the number of subcarriers corresponding to the inband portion repeated n times. And It can represent the portion allocated with both ends truncated, excluding the repeated Inband portion from the total number of subcarriers.

[0259] FIG. 38 illustrates the operation flow of a terminal for determining SE size and sidelobe suppression in a wireless communication system according to embodiments of the present disclosure.

[0260] Referring to Fig. 38, the process of determining the sidelobe suppression level after resource allocation and SE size determination is described.

[0261] In step 3801, the base station scheduler can perform resource allocation for the terminal. Through the resource allocation process, the terminal can determine the RB location and Inband RB size of the PUSCH to be transmitted over the uplink.

[0262] In step 3802, the terminal can determine the SE value using the default SE or flexible SE method through the method described above (e.g., FIG. 24).

[0263] In step 3803, the terminal can determine the sidelobe suppression level by considering the amount of interference affecting adjacent RBs. For example, the terminal [can use] a specific reference subcarrier corresponding to the SE portion described later in FIG. 41 It can select. And the terminal is a threshold value that satisfies the Inband emission requirement and the Shaping filter coefficient value that can provide interference in the selected reference subcarrier. By comparing, the coefficients of the shaping filter The degree of sidelobe suppression can be adjusted to be smaller. For example, when using HSP as FDSS-SE, the above-described condition can be expressed as shown in the following mathematical equation 14.

[0264] [Mathematical Formula 14]

[0265]

[0266]

[0267] Through Equation 14, the terminal can calculate the minimum value of the variance of the Gaussian window that can adjust the degree of sidelobe suppression. Through this, the terminal If the value is set to be greater than or equal to the minimum value of the variance of the Gaussian window, an FDSS-SE filter that satisfies the Inband emission requirement can be designed. However, the terminal can determine the degree of sidelobe suppression after determining the SE size, and the order must not be changed.

[0268] FIG. 39 shows a general block diagram of a DFT-s-OFDM receiver related to embodiments of the present disclosure.

[0269] Referring to FIG. 39, a general block diagram of a base station's DFT-s-OFDM receiver used / performing in conventional NR is illustrated. When a terminal performs uplink transmission using transparent FDSS, the base station's DMRS In this case, the estimated channel is in the form of the product of a shaping filter and a frequency-axis radio fading channel. It may be a channel estimated for the value. After channel equalization based on the estimated channel, IDFT dispreading can be performed. When the terminal uses transparent FDSS or transmits DFT-s-OFDM without FDSS, no new processing is performed, and the base station operates in the same way as the existing NR.

[0270] FIG. 40 shows a general block diagram of a DFT-s-OFDM receiver with non-transparent FDSS considered in a wireless communication system according to embodiments of the present disclosure.

[0271] Referring to Fig. 40, a block diagram is shown for the case where non-transparent FDSS is considered in the DFT-s-OFDM receiver at the base station. Unlike Fig. 40, a Shaping filter is multiplied to the existing DMRS as the DMRS for channel estimation (CE). It can be used as a DMRS for channel estimation. And wireless fading channel Channel estimation and channel compensation for this can be performed through channel equalization. Additionally, Matched Filtering is performed on the Inband RB portion, and this process This can be performed by multiplying on the frequency axis. If the shaping filter is a real filter, since, It may also be multiplied. After Matched Filtering, the IDFT Dispreading and Decoding process is performed in the same way as with the existing receiver.

[0272] FIG. 41 illustrates a reference carrier for sidelobe suppression in a wireless communication system according to embodiments of the present disclosure.

[0273] Referring to FIG. 41, frequency axis resources are described when a terminal uses Transparent FDSS-SE. The central part (Inband RB) may represent the frequency axis RB assigned by the base station to the terminal through a resource allocation process. The adjacent SE parts may represent the RB transmitted by the terminal with limited power to improve transmitter performance and reduce PAPR.

[0274] FIG. 42 is a table comparing Transparent FDSS and Transparent FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0275] Referring to FIG. 42, this is a table comparing the functions or characteristics of Transparent FDSS and Transparent FDSS-SE. NR Rel-18 supported only Transparent FDSS, and from the terminal's perspective, a preferred Shaping Filter could be specified according to the terminal manufacturer's choice, allowing the uplink data to be multiplied by the Shaping Filter for transmission. Furthermore, aside from the process of multiplying by the Shaping Filter, there are no changes on the side of the transmitter and receiver. Meanwhile, the Transparent FDSS-SE proposed in this disclosure allows the terminal to transmit signals with very limited power in adjacent RB sections other than the Inband RB without indication or configuration from the base station, thereby improving PAPR performance compared to Transparent FDSS. The filter used by the terminal in Transparent FDSS-SE can be selected from filters that satisfy RF requirements restricted by the upper layer, such as spectrum flatness, ACLR (adjacent channel leakage ratio), and Inband emission. For example, the filter used by the terminal in Transparent FDSS-SE needs to satisfy the Inband emission requirement. The inband emission requirement measures the amount of interference caused to adjacent RBs when transmitting to the currently assigned RB, and even when transmitting DFT-s-OFDM, frequency leakage occurs and the inband emission condition is satisfied. For Transparent FDSS-SE operation, the terminal can perform Transparent FDSS-SE by limiting the shaping filter to one that satisfies a level similar to the frequency leakage of DFT-s-OFDM and satisfies the inband emission condition defined in the 3GPP standard.

[0276] FIG. 43 illustrates the operation between a base station and a terminal required to perform Transparent FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0277] Referring to Fig. 43, the operation between the base station and the terminal required to perform Transparent FDSS-SE is described.

[0278] In step 4301, the base station can schedule PUSCH resources to the terminal via DCI. Through resource scheduling, the terminal can identify the location and RB size information of the resources allocated from the base station.

[0279] In step 4302, the terminal can determine whether Transparent FDSS-SE is possible based on resource allocation information received from the base station. In one embodiment, the information that the terminal must determine and decide may be the type of filter and the SE length. At this time, Transparent FDSS-SE transmission may be possible only when the filter and SE length available to the terminal satisfy the RF requirements of the 3GPP standard. The SE length may be flexibly selected depending on the allocated resource location and the length of the resource. For example, the terminal may first set a default SE implemented internally (e.g., step 2401 of FIG. 24) and obtain available SE information from the currently allocated resource by utilizing the resource's Start RB information, Inband RB, and the total number of RBs in the band. For example, the SE length may be determined according to the allocated RB location. Additionally, the terminal can determine whether the total length of the resource to which the SE being considered is applied to the allocated resource encroaches on the band edge and guard band. For example, the terminal may determine that Transparent FDSS-SE cannot be used if the total length of the resource to which SE is applied encroaches on the band edge and guard band, and may determine a smaller size SE to avoid encroaching on the band edge. In one embodiment, filter information may utilize an HSP filter or a 3-tap filter implemented within the terminal. Since the HSP filter must also satisfy Inband emission, the terminal may determine the sidelobe suppression level as shown in the example of FIG. 38. Additionally, the terminal may determine whether the filter has a maximum SE Power that satisfies RF requirements (e.g., Inband emission or ACLR).

[0280] In step 4303, the terminal can transmit PUSCH and DMRS to the base station by applying Transparent FDSS-SE. In one embodiment, the terminal can extend the edge portion of the DFT result X(k) to an L-point. In this case, the extended frequency domain sample X_SE(l) may not contain new information and may be in the form of a portion of the existing inband signal relocated to the SE domain. The SE process may be performed using a symmetric copying method. A predefined shaping coefficient W(l) may be multiplied element-wise on the extended spectrum X_SE(l). In this case, the shaping coefficient may be implemented based on a Look-Up Table (LUT). Furthermore, after applying FDSS-SE, the total power of the transmitted signal is always normalized to 1, and the total transmit power is not increased.

[0281] In step 4304, the base station can perform processes such as channel estimation, channel equalization, and decoding on the DMRS and PUSCH received from the terminal, in the same way as the reception process in NR. For example, the base station can perform channel estimation and channel equalization only for Inband subcarriers. Since the SE domain is not subject to reception / recovery, there is no need to perform additional channel estimation, channel equalization, and combining processes.

[0282] FIG. 44 illustrates the process of a base station sharing information necessary for Transparent FDSS-SE operation with a terminal in a wireless communication system according to embodiments of the present disclosure.

[0283] Referring to FIG. 44, the overall operation process of Transparent FDSS-SE is described, including the process of a base station sharing information necessary for Transparent FDSS-SE operation with a terminal. Accordingly, the operation of FIG. 44 may include the operation disclosed in FIG. 43 described above, and redundant descriptions are omitted.

[0284] In step 4401, the base station may update the terminal with information required for Transparent FDSS-SE operation through signaling (e.g., RRC signaling). For example, maximum SE length information and Power information of the SE portion may be updated through RRC signaling. Of course, the information required for Transparent FDSS-SE operation may also be pre-configured in the terminal without separate signaling from the base station.

[0285] The operations of steps 4402 through 4405 can be performed in the same or similar manner as the operations of steps 4301 through 4304 of FIG. 43 described above.

[0286] FIG. 45 illustrates the process required for switching between Transparent (T) mode and Non-Transparent (NT) mode in a wireless communication system according to embodiments of the present disclosure.

[0287] Referring to FIG. 45, the process required for a base station to switch between a transparent mode or transparent FDSS-SE mode (hereinafter referred to as T mode) and a non-transparent mode or non-transparent FDSS-SE mode (hereinafter referred to as NT mode) for a terminal is described.

[0288] In step 4501, the base station can check whether the conditions regarding which mode to operate in, T mode or NT mode, are met. If the conditions for a specific mode are met, the base station can decide to switch to the mode that satisfies the conditions. At this time, the specific conditions for each mode are explained in detail below in FIG. 46.

[0289] In step 4502, the base station may instruct the terminal to change to T mode or NT mode according to the decision of step 4501. For example, the base station's mode change instruction may be performed via RRC signaling, MAC signaling (e.g., MAC CE), or DCI.

[0290] FIG. 46 is a table comparing the usage conditions of NT-FDSS-SE and T-FDSS-SE in a wireless communication system according to embodiments of the present disclosure.

[0291] Referring to FIG. 46, the conditions regarding which mode to operate in, either the T mode or the NT mode described above, are specifically explained in step 4501 of FIG. 45. For example, in order to switch to the NT mode, at least one of the following must be satisfied: when the modulation order is Pi / 2-BPSK; when the link quality (e.g., SNR (signal-to-noise ratio), RSRP, or RSRQ) is below a certain value; when the CE (channel estimation) performance and / or BLER performance is below a certain value; when the terminal supports the NT mode; or when the base station fails to satisfy RF requirements (e.g., spectrum flatness, ACLR, or Inband emission) while performing blind detection. For example, regarding the conditions related to the terminal's capability, whether the NT mode is supported may mean whether the FDSS filter set by the base station on the terminal can be used.

[0292] FIG. 47 illustrates the range of allocatable resources according to SE values ​​in a wireless communication system according to embodiments of the present disclosure.

[0293] Referring to Fig. 47, the Inband RB When is 8RB or 20RB, the total bandwidth is When =100RB and SCS is 15kHz at BW of 15kHz and 20MHz, the range of Start_RB can be expressed as shown in the following mathematical formula 15.

[0294] [Mathematical Formula 15]

[0295]

[0296] Equation 15 may be a case where Start_RB is assumed to be the starting point of the Inband RB. Meanwhile, while Equation 15 may represent the range of Start_RB in an FDSS that does not include SE, the present disclosure includes SE, so the range of Start_RB may differ as shown in the following Equation 16.

[0297] [Mathematical Formula 16]

[0298]

[0299] For example, since Equation 16 includes more resources equal to SE, the range of Start_RB can take into account the SE size according to the SE ratio, unlike Equation 15.

[0300] Methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0301] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. One or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of this disclosure.

[0302] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disc storage devices, compact disc-ROM (CD-ROM), digital versatile discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0303] Additionally, the program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, LAN (local area network), WAN (wide area network), or SAN (storage area network), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present disclosure.

[0304] In the specific embodiments of the present disclosure described above, the components included in the disclosure are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present disclosure is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed of a singular form, and even if a component is expressed in the singular form, it may be composed of a plural form.

[0305] Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, it is understood that various modifications are possible within the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

Claims

1. A method performed by a base station of a wireless communication system, A step of determining frequency resource allocation for a second terminal in the SE (spectral extension) area of ​​a first terminal; The method includes the step of transmitting first scheduling information for the SE area to the first terminal and the second terminal, A method in which the first terminal is an FDSS (frequency domain spectrum shaping)-SE-based terminal.

2. In paragraph 1, the above method is, A method in which the frequency resource allocation for the second terminal is determined based on the uplink traffic of the first terminal and the second terminal to the base station.

3. In Paragraph 1, The above SE region includes at least one of a guard band or an overlap band, and A method in which the size of the guard band and the overlapping band is determined based on the received power value of the first terminal or the ratio value of the received power of the first terminal and the received power of the second terminal.

4. In Paragraph 1, The above first scheduling information includes at least one of the information related to FDSS, and The information related to the above FDSS includes at least one of whether the above FDSS is used, information regarding the SE ratio set for each MCS (modulation and coding scheme), a first table, or a second table, and The first table above includes information regarding the size of the frequency resources allocated to the first terminal and the size of the in-band area, and A method in which the second table above includes information regarding the size of the frequency resource allocated to the first terminal, the size of the in-band area, and the type of FDSS filter.

5. A method performed by a first terminal of a wireless communication system, The method includes the step of receiving first scheduling information for the SE (spectral extension) area of ​​the first terminal from a base station, The above-mentioned first terminal is an FDSS (frequency domain spectrum shaping)-SE-based terminal, and A method in which the above SE area includes at least a portion of the frequency resources allocated to the second terminal.

6. In Paragraph 5, A method in which the frequency resource allocation for the second terminal is based on the uplink traffic of the first terminal and the second terminal to the base station.

7. In Paragraph 5, The above SE region includes at least one of a guard band or an overlap band, and A method in which the size of the guard band and the overlapping band is based on the received power value of the first terminal or the ratio value of the received power of the first terminal and the received power of the second terminal.

8. In Paragraph 5, The above first scheduling information includes at least one of the information related to FDSS, and The information related to the above FDSS includes at least one of whether the above FDSS is used, information regarding the SE ratio set for each MCS (modulation and coding scheme), a first table, or a second table, and The first table above includes information regarding the size of the frequency resources allocated to the first terminal and the size of the in-band area, and A method in which the second table above includes information regarding the size of the frequency resource allocated to the first terminal, the size of the in-band area, and the type of FDSS filter.

9. In a base station of a wireless communication system, Transmitter / receiver; and It includes at least one control unit connected to the above-mentioned transmitting and receiving unit, and The above at least one control unit is: Determine the allocation of frequency resources for the second terminal in the SE (spectral extension) domain of the first terminal, and It is configured to transmit first scheduling information for the above SE area to the first terminal and the second terminal, and The above-mentioned first terminal is a base station that is an FDSS (frequency domain spectrum shaping)-SE based terminal.

10. In Paragraph 9, A base station in which the frequency resource allocation for the second terminal is determined based on the uplink traffic of the first terminal and the second terminal to the base station.

11. In Paragraph 9, The above SE region includes at least one of a guard band or an overlap band, and A base station in which the size of the guard band and the overlapping band is determined based on the received power value of the first terminal or the ratio value of the received power of the first terminal and the received power of the second terminal.

12. In Paragraph 9, The above first scheduling information includes at least one of the information related to FDSS, and The information related to the above FDSS includes at least one of whether the above FDSS is used, information regarding the SE ratio set for each MCS (modulation and coding scheme), a first table, or a second table, and The first table above includes information regarding the size of the frequency resources allocated to the first terminal and the size of the in-band area, and A base station, wherein the second table above includes information regarding the size of the frequency resource allocated to the first terminal, the size of the in-band area, and the type of FDSS filter.

13. In the first terminal of a wireless communication system, Transmitter / receiver; and It includes at least one control unit connected to the above-mentioned transmitting and receiving unit, and The above at least one control unit is: It is configured to receive first scheduling information for the SE (spectral extension) area of ​​the first terminal from the base station, and The above-mentioned first terminal is an FDSS (frequency domain spectrum shaping)-SE-based terminal, and The first terminal, wherein the above SE area includes at least a portion of the frequency resources allocated to the second terminal.

14. In Paragraph 13, A first terminal, wherein the frequency resource allocation for the second terminal is based on the uplink traffic of the first terminal and the second terminal for the base station.

15. In Paragraph 13, The above SE region includes at least one of a guard band or an overlap band, and The first terminal, wherein the size of the guard band and the overlapping band is based on the received power value of the first terminal or the ratio value of the received power of the first terminal and the received power of the second terminal.

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