Resource allocation apparatus and method

Abstract

According to embodiments, a base station apparatus can include a transceiver, a memory including instructions, and a processor. When executed by the processor, the instructions can cause the apparatus to determine overlapping resource elements in which a plurality of first resource elements configured for a first radio access technology (RAT) overlap a plurality of second resource elements configured for a second RAT. When executed by the processor, the instructions can cause the apparatus to determine at least one resource element of the overlapping resource elements. When executed by the processor, the instructions can cause the apparatus to allocate a second RAT related downlink signal to remaining resource elements of the plurality of second resource elements excluding the at least one resource element.

Description

Technical Field

[0001] This disclosure relates to an apparatus and method for allocating resources. Background Technology

[0002] The Narrowband Internet of Things (NB-IoT) standard and the Enhanced Machine Type Communication (eMTC) standard, both based on fourth-generation mobile communication, can also be used with fifth-generation mobile communication. With the expansion of new radio (NR) standard systems based on fifth-generation mobile communication, the need for coexistence between the NB-IoT standard (or eMTC standard) and the NR standard is increasing.

[0003] The above information is provided as background information related to this disclosure to aid in understanding it. No argument or decision is made regarding whether any content described above is applicable to existing technology related to this disclosure. Summary of the Invention

[0004] According to an embodiment, the base station device may include a transceiver, a memory containing instructions, and a processor. When executed by the processor, the instructions may cause the device to determine overlapping resource elements in which a plurality of first resource elements configured for a first radio access technology (RAT) and a plurality of second resource elements configured for a second RAT overlap in a specified time slot, the second RAT being different from the first RAT. When executed by the processor, the instructions may cause the device to determine, among the overlapping resource elements, at least one resource element for transmitting at least one reference signal associated with the first RAT. When executed by the processor, the instructions may cause the device to distribute downlink signals associated with the second RAT to the remaining resource elements of the plurality of second resource elements other than the at least one resource element. When executed by the processor, the instructions may cause the device to transmit the at least one reference signal associated with the first RAT through the at least one resource element, and transmit downlink signals associated with the second RAT through the remaining resource elements of the plurality of second resource elements other than the at least one resource element.

[0005] According to an embodiment, a method performed by a base station device may include determining overlapping resource elements in which a plurality of first resource elements configured for a first radio access technology (RAT) and a plurality of second resource elements configured for a second RAT overlap in a specified time slot, the second RAT being different from the first RAT. The method may include determining, among the overlapping resource elements, at least one resource element for transmitting at least one reference signal associated with the first RAT. The method may include allocating downlink signals associated with the second RAT to the remaining resource elements of the plurality of second resource elements other than the at least one resource element. The method may include transmitting the at least one reference signal associated with the first RAT through the at least one resource element, and transmitting the downlink signals associated with the second RAT through the remaining resource elements of the plurality of second resource elements other than the at least one resource element. The first RAT may include New Radio (NR). The second RAT may include Narrowband Internet of Things (NB-IoT) or Enhanced Machine-Type Communication (eMTC). Attached Figure Description

[0006] Figure 1A A wireless communication system is shown.

[0007] Figure 1B An example of a resource allocation scheme used to describe uplink and downlink transmissions is shown.

[0008] Figure 2 An example of a base station is shown.

[0009] Figure 3 Examples of resource structures in the time and frequency domains are shown.

[0010] Figure 4 An example of a channel in a communication standard is shown.

[0011] Figure 5A An example of a Physical Resource Block (PRB) according to the Long Term Evolution (LTE) standard is shown.

[0012] Figure 5B An example of a Physical Resource Block (PRB) according to the New Radio (NR) standard is shown.

[0013] Figure 6 This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the NB-IoT standard to coexist.

[0014] Figure 7A This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the NB-IoT standard to coexist.

[0015] Figure 7B This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the NB-IoT standard to coexist.

[0016] Figure 8A This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the eMTC standard to coexist.

[0017] Figure 8B This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the eMTC standard to coexist.

[0018] Figure 9 It is a flowchart of the base station's operation of allocating resources related to data associated with the first radio access technology (RAT) and data associated with the second RAT.

[0019] Figure 10 It is a flowchart of the base station's operation of allocating resources related to data associated with the first radio access technology (RAT) and data associated with the second RAT.

[0020] Figure 11 This is a flowchart of the base station operation.

[0021] Figure 12 The functional configuration of an electronic device according to an embodiment is shown. Detailed Implementation

[0022] The terminology used in this disclosure is for the purpose of describing particular embodiments only and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. The terms used herein, including technical or scientific terms, may have meanings commonly understood by one of ordinary skill in the art as described in this disclosure. Among the terminology used in this disclosure, terms defined in general dictionaries may be interpreted as having the same or similar meaning as in the context of related art, and are not to be construed as having an ideal or overly formal meaning unless explicitly defined in this disclosure. In some cases, even terms defined in this disclosure may not be construed as excluding embodiments of this disclosure.

[0023] In the various embodiments of this disclosure described below, hardware methods will be described as examples. However, since the various embodiments of this disclosure include techniques using both hardware and software, software-based methods are not excluded from the various embodiments of this disclosure.

[0024] Terms referring to signals (e.g., signals, information, messages, signaling), resources (e.g., symbols, time slots, subframes, radio frames, subcarriers, resource elements (REs), resource blocks (RBs), bandwidth portions (BWPs), timing), operational states (e.g., steps, operations, procedures), data (e.g., packets, user streams, information, bits, symbols, codewords), channels, network entities, and device components, etc., are used illustratively only for ease of explanation in the following description. Therefore, this disclosure is not limited to the terms described below, and other terms with equivalent technical meanings may be used.

[0025] Furthermore, in this disclosure, the terms "greater than" or "less than" are used to determine whether a particular condition is met or fulfilled, but this is merely a description used to express examples and does not exclude descriptions of "greater than or equal to" or "less than or equal to". A condition described as "greater than or equal to" can be replaced with "greater than", a condition described as "less than or equal to" can be replaced with "less than", and a condition described as "greater than or equal to, and less than" can be replaced with "greater than, and less than or equal to". Additionally, in the following, "A to B" refers to at least one element from A (inclusive) to B (inclusive). In the following, "C and / or D" means including at least one of C or D, i.e., {C, D, and C and D}.

[0026] While this disclosure uses terms from some communication standards (e.g., 3GPP, xRAN, ORAN) to describe various embodiments, these are merely illustrative examples. The various embodiments of this disclosure can be readily modified and applied to other communication systems.

[0027] Figure 1A A wireless communication system is shown.

[0028] Reference Figure 1A , Figure 1A The base station 110 and terminal 120 are shown as part of a node utilizing a wireless channel in a wireless communication system. Figure 1A Only one base station is shown, but the wireless communication system may also include another base station that is the same as or similar to base station 110.

[0029] Base station 110 is a network infrastructure that provides wireless access to terminal 120. Base station 110 has a coverage range defined based on the distance of the transmittable signal. In addition to "base station", base station 110 may also be referred to as "access point (AP)", "evolved node B (eNB)", "fifth generation node", "next generation node B (gNB)", "wireless point", "transmit / receive point (TRP)" or other terms with equivalent technical meanings.

[0030] Terminal 120 is a user-used device that communicates with base station 110 via a wireless channel. The link from base station 110 to terminal 120 is called the downlink (DL), and the link from terminal 120 to base station 110 is called the uplink (UL). Furthermore, although not in... Figure 1A As shown, terminal 120 and another terminal can communicate with each other via a wireless channel. In this case, the link between terminal 120 and the other terminal (device-to-device link (D2D)) is called a sidelink, which can be used interchangeably with the PC5 interface. In other embodiments, terminal 120 can operate without user intervention. According to embodiments, terminal 120, as a device performing machine-type communication (MTC), may not be carried by a user. Furthermore, according to embodiments, terminal 120 can be an MTC UE or a narrowband (NB) Internet of Things (IoT) device.

[0031] In addition to “terminal”, terminal 120 may also be referred to as “user equipment (UE)”, “customer premises equipment (CPE)”, “mobile station”, “user station”, “remote terminal”, “wireless terminal”, “electronic device”, “user equipment” or other terms with equivalent technical meaning.

[0032] Base station 110 and terminal 120 can perform beamforming. Base station 110 and terminal 120 can transmit and receive radio signals in relatively low frequency bands (e.g., NR frequency range 1 (FR1)). Furthermore, base station 110 and terminal 120 can transmit and receive radio signals in relatively high frequency bands (e.g., FR2 (or FR2-1, FR2-2, FR2-3) or FR3) and millimeter wave (mmWave) bands (e.g., 28 GHz, 30 GHz, 38 GHz, 60 GHz). Base station 110 and terminal 120 can perform beamforming to improve channel gain. Here, beamforming can include transmit beamforming and receive beamforming. Base station 110 and terminal 120 can provide directionality to the transmitted or received signals. To this end, base station 110 and terminal 120 can select a serving beam through a beam search or beam management process. After selecting a serving beam, subsequent communication can be performed through resources that have a QCL relationship with the resources transmitted by the serving beam.

[0033] If the large-scale characteristics of the channel carrying symbols at the first antenna port can be inferred from the channel carrying symbols at the second antenna port, then the first and second antenna ports can be evaluated as being in a QCL relationship. For example, the large-scale characteristics may include at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receiver parameters.

[0034] although Figure 1A The description states that both base station 110 and terminal 120 perform beamforming, but embodiments of this disclosure are not necessarily limited to this. In some embodiments, the terminal may or may not perform beamforming. Furthermore, the base station may or may not perform beamforming. That is, only one of the base station and the terminal may perform beamforming, or neither the base station nor the terminal may perform beamforming.

[0035] In this disclosure, a beam refers to the spatial flow of signals in a wireless channel and is formed by one or more antennas (or antenna elements), a formation process that may be referred to as beamforming. Beamforming may include at least one of analog beamforming or digital beamforming (e.g., precoding). Reference signals transmitted based on beamforming may include, for example, demodulation reference signals (DM-RS), channel state information reference signals (CSI-RS), synchronization signal / physical broadcast channel (SS / PBCH), and sounding reference signals (SRS). Furthermore, IEs (information elements), such as CSI-RS resources or SRS resources, may be used as configurations for each reference signal, and these configurations may include beam-related information. The beam-related information may mean whether a corresponding configuration (e.g., a CSI-RS resource) uses the same spatial domain filter as another configuration (e.g., another CSI-RS resource within the same CSI-RS resource set), or uses a different spatial domain filter, or which reference signal it is quasi-co-located (QCL) with, and if it is a QCL, what type it is (e.g., QCL type A, B, C, D).

[0036] Figure 1B An example of a resource allocation scheme used to explain uplink and downlink transmissions is shown. Resource allocation schemes can include Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0037] Reference Figure 1B Examples 150 and 160 are shown for resource allocation methods for transmitting / receiving data in downlink (DL) transmission from base station 110 to terminal 120 and uplink (UL) transmission from terminal 120 to base station 110. Example 150 may indicate an example of a time division duplex (TDD) scheme, which is a method of allocating resources for DL ​​transmission and resources used for UL transmission over time. Example 160 may indicate an example of a frequency division duplex (FDD) scheme, which is a method of allocating resources for DL ​​transmission and resources used for UL transmission according to frequency.

[0038] Referring to Example 150, base station 110 can transmit DL signals to terminal 120 via DL resource 152. Terminal 120 can receive DL signals transmitted from base station 110 via DL resource 152. Terminal 120 can transmit UL signals to base station 110 via UL resource 154. Base station 110 can receive UL signals transmitted from terminal 120 via UL resource 154. Referring to Example 150, DL resource 152 and UL resource 154 can be allocated different time resources. DL transmissions transmitted from base station 110 to terminal 120 and UL transmissions transmitted from terminal 120 to base station 110 can be performed in different time domains. Example 150 illustrates an example where time resources are allocated to DL resource 152 and UL resource 154, where the time resources are of the same length, but embodiments of this disclosure are not limited thereto. For example, time resources of different lengths can be allocated to each of DL resource 152 and UL resource 154. In other words, the period of downlink transmission can be set differently from the period of uplink transmission. Alternatively, DL resource 152 and UL resource 154 can be allocated different lengths of time resources. In other words, downlink and uplink transmissions can be sent aperiodically. Although not shown in Example 150, a protection period may be included between DL resource 152 and UL resource 154.

[0039] Referring to Example 160, base station 110 can transmit DL signals to terminal 120 via DL resource 162. Terminal 120 can receive DL signals transmitted from base station 110 via DL resource 162. Terminal 120 can transmit UL signals to base station 110 via UL resource 164. Base station 110 can receive UL signals transmitted from terminal 120 via UL resource 164. Referring to Example 150, DL resource 152 and UL resource 154 can be allocated resources with different frequencies. In other words, DL transmissions transmitted from base station 110 to terminal 120 and UL transmissions transmitted from terminal 120 to base station 110 can be performed in different frequency domains. Example 150 illustrates an example where frequency resources are allocated to DL resource 152 and UL resource 154, wherein the bandwidth of the frequency resources is the same, but embodiments of this disclosure are not limited thereto. For example, each resource of DL resource 152 and UL resource 154 can be allocated frequency resources of different sizes.

[0040] When comparing Examples 150 and 160, DL resources 152 and UL resources 154 can be allocated frequency resources with wider bandwidths than DL resources 162 and UL resources 164. For example, compared to base station 110 or terminal 120 of Example 160, base station 110 or terminal 120 of Example 150 can transmit a greater amount of data in the same amount of time. In contrast, DL resources 162 and UL resources 164 can be allocated frequency resources with narrower bandwidths than DL resources 152 and UL resources 154, but can be allocated time resources with longer intervals. For example, compared to base station 110 or terminal 120 of Example 150, base station 110 or terminal 120 of Example 160 can transmit seamlessly (or continuously).

[0041] To describe the TDD scheme in the embodiments of this disclosure, the resource structure of the TDD scheme defined in a communication standard (e.g., LTE or NR) is described exemplarily. According to the embodiment, base station 110 and terminal 120 can use the LTE TDD scheme. The LTE TDD scheme defines time resources for downlink communication and time resources for uplink communication. A radio frame may include UL subframes for uplink (UL) transmission and DL subframes for downlink (DL) transmission. A frame may include special subframes (SSFs) for switching from downlink transmission to uplink transmission. Here, a combination of UL subframes, DL subframes, and special subframes contained in a frame is referred to as a UL / DL configuration. Another UL / DL configuration shows another combination of UL subframes, DL subframes, and special subframes in a frame. UL / DL configurations can operate as shown in Table 1. In Table 1 below, D represents a DL subframe, S represents a special subframe, and U represents a UL subframe. For example, UL / DL configuration #2 may include six DL subframes, two UL subframes, and two special subframes, and UL / DL configuration #5 may include eight DL subframes, one UL subframe, and one special subframe.

[0042] [Table 1]

[0043]

[0044] A special subframe may include a downlink pilot slot (DwPTS), a guard period (GP), and an uplink pilot slot (UpPTS). The DwPTS is the downlink resource portion of the special subframe, used for Physical Downlink Shared Channel (PDSCH) transmission. The UpPTS is the uplink resource portion of the special subframe, used for Sounding Reference Signal (SRS) or Physical Random Access Channel (PRACH) transmission. The guard period (GP) is the portion where neither downlink nor uplink transmission occurs, and can be used for downlink-uplink handover. The guard period (GP) can be the portion between the DwPTS and UpPTS within a special subframe (e.g., 1 ms). Here, the combination of DwPTS, guard period, and UpPTS contained in a special subframe is called the Special Subframe Configuration (SSF Configuration). Different SSF Configurations indicate different combinations of DwPTS length, guard period length, and UpPTS length within a frame. When the wireless communication environment supports the LTE-TDD scheme, the SSF Configuration can operate as shown in Table 2. For example, SSF configuration #5 can indicate a combination of DwPTS occupying 3 symbols, protection cycle occupying 9 symbols, and UpPTS occupying 2 symbols, while SSF configuration #7 can indicate a combination of DwPTS occupying 10 symbols, protection cycle occupying 2 symbols, and UpPTS occupying 2 symbols.

[0045] [Table 2]

[0046]

[0047] According to an embodiment, base station 110 and terminal 120 can use an NR TDD scheme. The NR TDD scheme can be configured to be more flexible than the LTE TDD scheme. The NR TDD scheme defines a DL-UL mode indicating the relationship between DL time resources for downlink communication and UL time resources for uplink communication. The DL-UL mode can include a configuration period, a DL time interval, and a UL time interval. The configuration period can refer to the time during which a DL-UL mode is applied. The configuration period can be one of 0.5ms, 0.625ms, 1ms, 1.25ms, 2.5ms, 3ms, 4ms, 5ms, and 10ms. The DL time interval can be a time resource for continuing downlink communication. The DL time interval can be represented as the number of time slots, the number of time slots and the number of symbols, or only the number of symbols. The DL time interval can be located at the beginning of a configuration period. The UL time interval can be a time resource for continuing uplink communication. The UL time interval can be represented as the number of time slots, the number of time slots and the number of symbols, or only the number of symbols. The UL time interval can be located at the end of a configuration period. Within a configuration period, time slots other than DL time slots (where all symbols are DL symbols) and UL time slots (where all symbols are UL symbols) can be flexible time slots. Downlink symbols, uplink symbols, and flexible symbols can be distinguished from each other within a time slot (e.g., 14 symbols). As an example of an NRTDD resource structure, when the subcarrier spacing (SCS) is 15 kHz, five time slots can be defined within a 5 ms configuration period. Of these five time slots, the first two can be downlink time slots, the last two can be uplink time slots, and the middle time slot can have both uplink and downlink symbols. Of the remaining 14 symbols in the time slots, the first five can be downlink symbols, the last three can be uplink symbols, and the remaining six can be flexible symbols.

[0048] Since the same carrier frequency is used for both uplink and downlink transmissions in a TDD scheme, it is necessary to distinguish between the DL (Deep Link) time interval and the UL (Upper Link) time interval. Therefore, as described above, the resource structure of a TDD scheme can include the DL time interval, the UL time interval, and the remaining time period between the DL and UL time intervals. For example, a transmit path can be used during the DL time interval when base station 110 transmits signals, but a receive path can be used instead of a transmit path during the UL time interval when base station 110 receives signals.

[0049] Figure 2 An example of a base station is shown. Figure 2The text describes how the functions of a base station are divided and implemented by different entities: the DU (Dedicated Unit) and the RU (Remote Root Unit). A fronthaul interface can be used for communication between the DU and RU. Unlike the backhaul between the base station and the core network, the fronthaul refers to the connection between the entities in the Radio Access Network (RAN) and the base station. Figure 2 An example of a fronthaul architecture between a DU 210 and a RU 220 is shown, but this is for illustrative purposes only and the disclosure is not limited thereto. In other words, embodiments of the disclosure can also be applied to a fronthaul architecture between a DU and multiple RUs. For example, embodiments of the disclosure can be applied to a fronthaul architecture between a DU and two RUs. Furthermore, embodiments of the disclosure can also be applied to a fronthaul architecture between a DU and three RUs.

[0050] Reference Figure 2 Base station 110 may include DU 210 and RU 220. Fronthaul 215 between DU 210 and RU 220 can operate via Fx interface. For operation of fronthaul 215, an interface such as enhanced public radio interface (eCPRI) or Ethernet radio (ROE) can be used.

[0051] With the development of communication technology and the increase in mobile data traffic, the bandwidth requirements for fronthaul between digital units and radio units have increased significantly. In deployments such as centralized / cloud radio access networks (C-RAN), the DU can implement functions that perform Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), Media Access Control (MAC), and Physical (PHY) layers, while the RU can implement further functions that perform PHY layer functions and radio frequency (RF) functions.

[0052] DU 210 can be responsible for higher-level functions of the wireless network. For example, DU 210 can perform MAC layer functions and a portion of the PHY layer functions. Here, a portion of the PHY layer functions are functions performed at a higher level within the PHY layer functions and may include, for example, channel coding (or channel decoding), scrambling (or descrambling), modulation (or demodulation), and layer mapping (or layer demapping). According to embodiments, if DU 210 conforms to the O-RAN standard, it can be referred to as an O-RAN DU (O-DU). DU 210 can be replaced and represented as the first network entity (e.g., gNB) of the base station in embodiments of this disclosure, if desired.

[0053] RU 220 can be responsible for lower-layer functions of the wireless network. For example, RU 220 can perform a portion of the PHY layer and RF functions. Here, a portion of the PHY layer refers to functions performed at a relatively lower level than DU 210 within the PHY layer functions, and may include, for example, IFFT conversion (or FFT conversion), cyclic prefix (CP) insertion (or CP removal), and digital beamforming. RU 220 may be referred to as an Access Unit (AU), Access Point (AP), Transmit / Receive Point (TRP), Remote Radio Header (RRH), Radio Unit (RU), or other terms with equivalent technical meanings. According to embodiments, if RU 220 conforms to the O-RAN standard, it may be referred to as an O-RAN RU (O-RU). RU 220 may be replaced and referred to as a second network entity (e.g., gNB) of the base station in embodiments of this disclosure, if desired.

[0054] although Figure 2 Base station 110 is described as including DU 210 and RU 220, but embodiments of this disclosure are not limited thereto. The base station according to embodiments can be implemented in a distributed deployment, configured with a centralized unit (CU) to perform higher-layer access network functions (e.g., Packet Data Convergence Protocol (PDCP), Radio Resource Control (RRC)) and a distributed unit (DU) to perform lower-layer functions. For example, the distributed unit (DU) may include... Figure 2 The base station consists of a Digital Unit (DU) and a Radio Unit (RU). Furthermore, for example, between the core network (e.g., a 5G core (5GC) or Next Generation Core (NGC)) and the Radio Access Network (RAN), the base station can be implemented in an architecture where CUs, DUs, and RUs are arranged in sequence. The interface between the CU and the Distributed Unit (DU) can be referred to as the F1 interface.

[0055] A centralized unit (CU) can handle functions at higher layers than a DU by connecting to one or more DUs. For example, a CU can handle functions at the Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, while DUs and RUs can handle functions at lower layers. A DU can perform some functions at the Radio Link Control (RLC), Media Access Control (MAC), and PHY layers (high PHY), while an RU can perform the remaining functions at the PHY layer (low PHY). Furthermore, for example, a digital unit (DU) can include distributed units (DUs) implemented according to a distributed base station deployment. Hereinafter, unless otherwise defined, the description refers to the operation of digital units (DUs) and RUs, but various embodiments of this disclosure can be applied to base station arrangements that include CUs or where DUs are directly connected to the core network (i.e., CUs and DUs are integrated into a base station (e.g., an NG-RAN node, which is a single entity).

[0056] Figure 3Examples of resource structures in the time and frequency domains are shown. Figure 3 The basic structure of the time-frequency domain is shown, which is the radio resource domain for data or control channels to be transmitted in the downlink or uplink.

[0057] Reference Figure 3 The horizontal axis indicates the time domain, and the vertical axis indicates the frequency domain. The smallest transmission unit in the time domain is an Orthogonal Frequency Division Multiplexing (OFDM) symbol; Nsymb OFDM symbols 302 are grouped into a single time slot 306. The subframe length is defined as 1.0 ms, and the radio frame length 314 is defined as 10 ms. The smallest transmission unit in the frequency domain is a subcarrier; the carrier bandwidth for configuring the resource grid can be configured by NBW subcarriers 304.

[0058] The basic unit of resources in the time-frequency domain is a resource element (hereinafter referred to as "RE") 312, which can be indicated as an OFDM symbol index and a subcarrier index. A resource block can include multiple resource elements. In LTE systems, a resource block (RB) (or physical resource block, hereinafter referred to as "PRB") is defined as Nsymb consecutive OFDM symbols in the time domain and NSCRB consecutive subcarriers in the frequency domain. In NR systems, a resource block (RB) 308 can be defined as NSCRB consecutive subcarriers 310 in the frequency domain. An RB 308 includes NSCRB REs 312 on the frequency domain axis. Typically, the smallest transmission unit for data is an RB, and the number of subcarriers is NSCRB=12. The frequency domain can include common resource blocks (CRBs). Physical resource blocks (PRBs) can be defined in the bandwidth portion (BWP) in the frequency domain. CRB and PRB numbering can be determined based on the subcarrier spacing. The data rate can be increased proportionally to the number of RBs scheduled for the terminal.

[0059] In NR systems, downlink and uplink transmission bandwidths may differ in frequency division duplex (FDD) systems that operate by dividing downlink and uplink by frequency. Channel bandwidth indicates the radio frequency (RF) bandwidth corresponding to the system transmission bandwidth. Table 3 indicates a portion of the correspondence between system transmission bandwidth, subcarrier spacing (SCS), and channel bandwidth defined in the NR system (e.g., frequency range (FR) 1 (310MHz to 7125MHz) below x GHz). Table 4 indicates a portion of the correspondence between transmission bandwidth, subcarrier spacing, and channel bandwidth defined in the NR system (e.g., frequency range (e.g., FR2 (24250MHz-52600MHz) or FR2-2 (52600MHz to 71000MHz)) above y GHz). For example, in an NR system with a 100MHz channel bandwidth and a subcarrier spacing of 30kHz, the transmission bandwidth is configured as 273 RBs. In Tables 3 and 4, N / A can be a bandwidth-subcarrier combination not supported in the NR system.

[0060] [Table 3]

[0061]

[0062] [Table 4]

[0063]

[0064] Figure 4 An example of a channel in a communication standard is shown.

[0065] The channel may include a physical channel 410, a transport channel 420, and a logical channel 430, as defined in the communication standard.

[0066] Reference Figure 4 Physical channel 410 can provide functions (e.g., channel coding, HARQ processing, modulation, multi-antenna processing, and resource mapping) necessary for generating physical signals in the physical layer. In the physical layer, signals are modulated in an OFDM scheme and can be transmitted via time-frequency resources in the wireless environment (e.g., ...). Figure 3 Send resources from the resource grid.

[0067] In downlink transmission, physical channel 410 may include at least one of the physical broadcast channel (PBCH), physical downlink shared channel (PDSCH), or physical downlink control channel (PDCCH). The PDCCH can be used to carry downlink control information (DCI). Typically, downlink data may refer to symbols transmitted via the PDSCH, and downlink control signals may include symbols transmitted via the PDCCH. Furthermore, in the downlink, in addition to... Figure 4 In addition to the channels shown, SS / PBCH blocks, including synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)) and broadcast signals (e.g., PBCH), can also be transmitted. Furthermore, in the downlink, channel state information reference signals (CSI-RS) for acquiring measurement or channel information, demodulation reference signals (DMRS) for channel estimation and demodulation, and phase tracking reference signals (PTRS) can be transmitted.

[0068] In uplink transmission, physical channel 410 may include at least one of the Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), or Physical Random Access Channel (PRACH). PUSCH or PUCCH may be used to carry uplink control information (UCI). Typically, uplink data may refer to symbols transmitted via PUSCH, and uplink control signals may refer to symbols corresponding to UCI. For example, UCI may include at least one of scheduling request (SR), (multiple) hybrid automatic repeat request-acknowledgment (HARQ-ACK) bits, or channel state information (CSI). Furthermore, in the uplink, DMRS and PTRS used for channel estimation and demodulation may be integrated with… Figure 4 The channels shown are sent together for channel estimation.

[0069] Transport channel 420 can connect the physical layer and the Media Access Control (MAC) layer, which is located higher than the physical layer, and can be classified according to how data is transmitted through the radio interface. In the downlink, transport channel 420 may include at least one of a paging channel (PCH) for paging, a broadcast channel (BCH) for broadcasting system information, and a downlink shared channel (DL-SCH) for downlink data transmission. In the uplink, transport channel 420 may include at least one of a random access channel (RACH) for transmitting a random access preamble or an uplink shared channel (UL-SCH) for uplink data transmission.

[0070] Logical channel 430 is located above the transport channel and mapped to transport channel 420. Logical channel 430 can be classified as a control channel for transmitting control area information and a traffic channel for transmitting user area information. The control channel of logical channel 430 may include at least one of paging control channel (PCCH), broadcast control channel (BCCH), common control channel (CCCH), or dedicated control channel (DCCH). The traffic channel of logical channel 430 may include a dedicated traffic channel (DTCH).

[0071] In describing embodiments of this disclosure, random access signals may include sequences transmitted via a Physical Random Access Channel (PRACH). "Data" may include signals other than reference signals. For example, "data" acquired by a receiver in uplink communication may include signals transmitted via a PUSCH. However, the PUSCH is an example, and embodiments of this disclosure are certainly applicable to other channels (e.g., PDSCH, PBCH, PDCCH, and PUCCH) that require channel estimation.

[0072] Figure 5A An example of a Physical Resource Block (PRB) according to the Long Term Evolution (LTE) standard is shown.

[0073] Figure 5B An example of a Physical Resource Block (PRB) according to the New Radio (NR) standard is shown.

[0074] Reference Figure 5A According to the Long Term Evolution (LTE) standard, multiple PRBs can be configured within a 10MHz bandwidth. The 10MHz bandwidth shown is exemplary, and the bandwidth can be set to one of 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz. For example, a PRB can be configured based on a subcarrier spacing (SCS) of 15kHz.

[0075] According to an embodiment, up to 50 PRBs can be configured within a 10MHz bandwidth. As shown in the figure, PRB#0 to PRB#49 can be configured within the 10MHz bandwidth. The low-frequency band 510 and the high-frequency band 520 can be divided according to DC subcarriers. PRB#0 to PRB#24 can be arranged in the low-frequency band 510. PRB#25 to PRB#49 can be arranged in the high-frequency band 520.

[0076] According to examples, narrowband-based standards have been proposed for use in conjunction with LTE standards for machine communication, such as the Internet of Things (IoT). For example, the Narrowband Internet of Things (NB-IoT) standard and the Enhanced Machine Type Communication (eMTC) standard have been proposed.

[0077] like Figure 5A As shown, the LTE standard and the NB-IoT standard (or eMTC standard) can coexist within the same bandwidth. For example, the spectral efficiency (SE) of the LTE standard can be set to approximately 90%. Here, resources can be allocated for the NB-IoT standard (or eMTC standard) in approximately 10% of the remaining frequency area.

[0078] For example, resources for the NB-IoT standard (or eMTC standard) can be allocated within the guard band of the LTE standard. Resources for the NB-IoT standard (or eMTC standard) can be configured based on a 180kHz bandwidth. Resources for the NB-IoT standard (or eMTC standard) can correspond to a PRB of the LTE standard. Devices using the NB-IoT standard (or eMTC standard) can operate in one of three modes: stand-alone operation, guard band operation, and in-band operation.

[0079] For example, in stand-alone operation mode, NB-IoT (or eMTC) standard devices can operate independently within a specified frequency band. For example, in guard band operation mode, NB-IoT (or eMTC) standard devices can use unused PRB operations within the guard band of the LTE standard. For example, in in-band operation mode, NB-IoT (or eMTC) standard devices can use PRB operations defined within the frequency band of the LTE standard.

[0080] Reference Figure 5A NB-IoT (or eMTC) standard devices can operate based on guard band operation modes. For example, NB-IoT (or eMTC) standard devices can operate using a 180kHz frequency band set within guard band 511 in the frequency band of PRB#0 (less than or equal to LTE standard) or guard band 521 in the frequency band of PRB#49 (greater than or equal to LTE standard).

[0081] Reference Figure 5B According to the New Radio (NR) standard, multiple PRBs can be configured within a 10MHz bandwidth. The 10MHz bandwidth shown is exemplary. In Frequency Range 1 (FR1), the bandwidth can be set to a maximum of 100MHz. For example, the bandwidth can be set to one of 5MHz, 10MHz, 15MHz, 20MHz, 25MHz, 30MHz, 40MHz, 50MHz, 60MHz, 70MHz, 80MHz, 90MHz, and 100MHz. For example, when the subcarrier spacing (SCS) is 15kHz, the PRB can be configured within a 10MHz bandwidth, such as... Figure 5B As shown.

[0082] According to an embodiment, up to 52 PRBs can be configured within a 10MHz bandwidth. As shown in the figure, PRB#0 to PRB#51 can be configured within the 10MHz bandwidth. The 10MHz bandwidth can be divided into a lower frequency band 530 and a higher frequency band 540. The higher frequency band 540 may include DC subcarriers. PRB#0 to PRB#25 can be arranged in the lower frequency band 530. PRB#26 to PRB#51 can be arranged in the higher frequency band 540.

[0083] like Figure 5B As shown, the NR standard and the NB-IoT standard (or eMTC standard) can coexist within the same bandwidth. However, resources used for the NB-IoT standard (or eMTC standard) can be allocated as follows: Figure 5A The configuration is shown. Devices conforming to the NB-IoT standard (or eMTC standard) can operate using one of resources 531 and / or 541.

[0084] Resources 531 and / or 541 may overlap with resources in the NR standard (e.g., PRB#0 or PRB#51). The spectral efficiency (SE) of the NR standard can be set to 90% or more (e.g., approximately 93.6%). Therefore, resources arranged within the frequency bands of the NR standard (e.g., PRB#0 or PRB#51) may overlap with NB-IoT guard band resources. For example, resource 531 may correspond to PRB#0. However, resource 541 may not correspond to PRB#51. In the NR standard, the LTE standard resource element (RE) index may change due to the use of DC subcarriers. Therefore, resource 531 may correspond to PRB#0, but resource 541 may not correspond to PRB#51.

[0085] like Figure 5B As shown, the PRB of the NR standard and the PRB of the NB-IoT standard can overlap in some REs. In this case, overlap may occur between the broadband signal (tracking reference signal (TRS)) of the NR standard and the downlink signal of the NB-IoT standard. For example, since the downlink signal of the eMTC standard can be transmitted within the band of the NR standard, overlap may occur between the reference signal (e.g., the tracking reference signal) fixed within the system bandwidth and the downlink signal of the eMTC standard.

[0086] Subsequently, this specification will describe the operation of base station 110 to avoid conflicts between the reference signal (e.g., tracking reference signal) of the NR standard and the downlink signal of the NB-IoT standard (or eMTC standard) due to the coexistence of the NR standard and the NB-IoT standard (or eMTC standard). For example, base station 110 can perform resource allocation for the downlink signal of the NB-IoT standard (or eMTC standard) so that the performance of the NR standard terminal is not degraded.

[0087] Figure 6 This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the NB-IoT standard to coexist.

[0088] Reference Figure 6 When downlink signals of the NR standard and the NB-IoT standard are simultaneously allocated in the same time slot frequency band, base station 110 can use parameters sent to the NB-IoT standard device (or terminal) to configure the NB-IoT standard device not to use at least one time slot and / or at least one time slot. By configuring the NB-IoT standard device not to use at least one time slot and / or at least one time slot, it is possible to prevent downlink signals of the NR standard and the NB-IoT standard from being allocated to the same resources.

[0089] Example 600 illustrates the resource planes of PRB#51 for the NR standard and resource 541 for the NB-IoT standard. In the same time slot, downlink signals for the NR standard (e.g., tracking reference signals) can be allocated in PRB#51, and downlink signals for the NB-IoT standard can be allocated in resource 541. In this case, base station 110 may not allocate downlink signals for the NB-IoT standard in the time slot where downlink signals for the NR standard (e.g., tracking reference signals for the NR standard, hereinafter referred to as NR TRS) are allocated. For example, NR TRS can be allocated in PRB#51 in the Nth time slot. Base station 110 may not allocate downlink signals (or downlink data) for the NB-IoT standard in resource 541 in the Nth time slot. Base station 110 may allocate downlink signals (or downlink data) for the NB-IoT standard in resource 541 in the (N+1)th time slot.

[0090] For example, T0 and T1 represent resources through which Tracking Reference Signals (TRS) according to the NR standard (hereinafter referred to as NRTRS) are transmitted. NR TRS can be transmitted through resources (or resource elements (REs)) indicated by T0 and / or T1. Downlink data of the NB-IoT standard (e.g., Narrowband Physical Downlink Shared Channel (NB PDSCH)) can be transmitted through resources within a resource block (RB) according to resource index number y. Resource index number y can be configured sequentially within the RB. Figure 6 In this context, the resource index number y can be from 0 to 151. R0 can represent NB Reference Signal (NRS) #0 (or the first NRS) associated with antenna port #0 (or the first antenna port). R1 ​​can represent NRS#1 (or the second NRS) associated with antenna port #1 (or the second antenna port). NRS#0 and NRS#1 can be used for demodulation of downlink data according to the NB-IoT standard. Figure 6 In this diagram, NRS#0 and NRS#1 are shown as being transmitted simultaneously in the same time slot, but this is only for ease of description. For example, one of NRS#0 and NRS#1 may be transmitted within a single time slot. For antenna port #0, NRS#0 may be transmitted via the resource (or RE) indicated by R0. For antenna port #1, NRS#1 may be transmitted via the resource (or RE) indicated by R1.

[0091] According to the resource plane of PRB#51 of the NR standard and resource 541 of the NB-IoT standard in Example 600, the RE index of the NB-IoT standard may not correspond to the RE index of the NR standard. For example, the RE according to RE index #1 of the NR standard can be set to RE index #0 of the NB-IoT standard. For example, in Example 600, the RE indicated by T0 can be indicated based on RE indexes #3, #7, and #11 of the NR standard. In Example 600, the RE indicated by T0 can be indicated based on RE indexes #2, #6, and #10 of the NB-IoT standard.

[0092] According to an embodiment, in FR1, NR TRS can be transmitted through consecutive time slots. Therefore, the downlink signal (or downlink data) of the NB-IoT standard may not be allocated to consecutive time slots for transmitting NR TRS. Since the downlink signal (or downlink data) of the NB-IoT standard is not allocated to consecutive time slots, the data rate of the NB-IoT standard may be reduced. According to an embodiment, when the downlink signal of the NR standard and the downlink signal of the NB-IoT standard are allocated to the same resources, the base station 110 may not allocate the downlink signal of the NB-IoT standard in the symbols for transmitting the downlink signal of the NR standard (e.g., NR TRS). However, since the downlink signal of the NB-IoT standard is not transmitted in the symbols for transmitting the downlink signal of the NR standard (e.g., NR TRS), the channel coding rate may increase, and the data rate may decrease. When the downlink signal of the NR standard and the downlink signal of the NB-IoT standard are allocated to the same resources, the technical features for minimizing the data rate loss of the NB-IoT standard downlink signal without changing the NB-IoT standard terminal will be described below.

[0093] Figure 7A This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the NB-IoT standard to coexist.

[0094] Figure 7B This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the NB-IoT standard to coexist.

[0095] Reference Figure 7A and Figure 7B When downlink signals of the NR standard (e.g., NR TRS) and downlink signals of the NB-IoT standard are configured to be allocated to the same resources, the base station 110 can change the resource allocation scheme of the NB-IoT standard.

[0096] Reference Figure 7AExample 710 illustrates the resource planes of PRB#51 for the NR standard and resource 541 for the NB-IoT standard. As mentioned above, the RE indexes for the NR standard and the NB-IoT standard may not be set to the same value in PRB#51 and resource 541 for the NB-IoT standard. The resource planes are exemplary and can be configured similarly in other PRBs. For example, Figure 5B The resource plane of PRBs (e.g., PRB#26 to PRB#51) arranged in the higher frequency band 540 and the resources corresponding to the PRBs and used for the NB-IoT standard can be configured as in Example 710.

[0097] For example, a collision may occur when the RE of the NR TRS and the RE of the NB-IoT standard downlink data are set to the same value in the Nth time slot. Base station 110 can transmit NR TRS in symbol index #4 (or symbol index #8). Base station 110 can also transmit NR TRS using REs based on NR standard RE indices #3, #7, and #11. Furthermore, base station 110 can transmit NR TRS using REs based on NB-IoT standard RE indices #2, #6, and #10.

[0098] Base station 110 can be different from Figure 6 The resource allocation scheme shown herein is used to allocate downlink signals for the NB-IoT standard. Base station 110 can allocate downlink signals for the NB-IoT standard in the Nth time slot, even if NR TRS is transmitted in the Nth time slot. Base station 110 may choose not to allocate downlink signals for the NB-IoT standard to the RE (or resource) transmitting NR TRS, and may allocate downlink signals for the NB-IoT standard only to the remaining REs.

[0099] For example, base station 110 can allocate downlink signals (or downlink data) of the NB-IoT standard sequentially according to the symbol index and RE index. For example, base station 110 can allocate downlink data of the NB-IoT standard sequentially within symbol index #0 according to the RE index of the NB-IoT standard. Base station 110 can allocate NB-IoT downlink data #0 within the NB-IoT standard RE index #0 of symbol index #0. Base station 110 can allocate NB-IoT downlink data #11 within the NB-IoT standard RE index #11 of symbol index #0.

[0100] The index for NB-IoT downlink data can be incremented among the remaining REs excluding the REs used to transmit NR TRS. Base station 110 can omit allocating NB-IoT downlink data in an RE allocated for NR TRS and can allocate NB-IoT downlink data in the next RE. For example, in symbol index #4, NB-IoT downlink data #49 can be transmitted through the RE according to NB-IoT standard RE index #1. In symbol index #4, the RE according to NB-IoT standard RE index #2 can be allocated for NR TRS. In symbol index #4, base station 110 can omit allocating NB-IoT standard downlink data in the RE according to NB-IoT standard RE index #2. In symbol index #4, NB-IoT downlink data #51 can be transmitted through the RE according to NB-IoT standard RE index #3.

[0101] Reference Figure 7B Example 720 illustrates the resource planes of PRB#0 for the NR standard and resource 531 for the NB-IoT standard. In both PRB#0 and resource 531, the RE indexes for the NR standard and the NB-IoT standard can be set to the same value. This resource plane is exemplary and can be configured similarly in other PRBs. For example, it can be arranged in… Figure 5B The lower frequency band 530 of the PRB (e.g., PRB#0 to PRB#25) and the resource plane corresponding to the PRB and used for the NB-IoT standard can be configured as in Example 720.

[0102] For example, a collision may occur when the RE of the NR TRS and the RE of the NB-IoT standard downlink data are set to the same value in the Nth time slot. Base station 110 can transmit the NR TRS in symbol index #4 (or symbol index #8). Base station 110 can also transmit the NR TRS using REs based on NR standard RE index #2, NR standard RE index #6, and NR standard RE index #10. Base station 110 can also transmit the NR TRS using REs based on NB-IoT standard RE index #2, NB-IoT standard RE index #6, and NB-IoT standard RE index #10.

[0103] Base station 110 can be different from Figure 6 The resource allocation scheme shown herein is used to allocate downlink signals for the NB-IoT standard. Base station 110 can allocate downlink signals for the NB-IoT standard in the Nth time slot, even if NR TRS is transmitted in the Nth time slot. Base station 110 may choose not to allocate downlink signals for the NB-IoT standard to the RE (or resource) transmitting NR TRS, and may allocate downlink signals for the NB-IoT standard only to the remaining REs.

[0104] For example, base station 110 can allocate downlink signals (or downlink data) of the NB-IoT standard sequentially according to the symbol index and RE index. For instance, base station 110 can allocate downlink data of the NB-IoT standard sequentially within symbol index #0 according to the RE index of the NB-IoT standard. Base station 110 can allocate downlink data #0 of NB-IoT to the RE of RE index #0 of the NB-IoT standard within symbol index #0. Base station 110 can allocate downlink data #11 of NB-IoT to the RE of RE index #11 of the NB-IoT standard within symbol index #0.

[0105] The index for NB-IoT downlink data can be incremented among the remaining REs excluding the RE that transmits the NR TRS. Base station 110 can omit allocating NB-IoT downlink data in the RE allocated for the NR TRS and can allocate NB-IoT downlink data in the next RE. For example, in symbol index #4, NB-IoT downlink data #49 can be transmitted through the RE with RE index #1 according to the NB-IoT standard (or NR standard). In symbol index #4, the RE with RE index #2 according to the NB-IoT standard (or NR standard) can be allocated for the NR TRS. In symbol index #4, base station 110 can choose not to allocate NB-IoT standard downlink data in the RE with RE index #2 according to the NB-IoT standard (or NR standard). In symbol index #4, NB-IoT downlink data #51 can be transmitted through the RE with RE index #3 according to the NB-IoT standard.

[0106] Reference Figure 7A and Figure 7B When downlink signals of the NR standard (e.g., NR TRS) and the NB-IoT standard are configured to be allocated to the same resource (or RE), base station 110 can first allocate the downlink signal of the NR standard (e.g., NR TRS) and can allocate the downlink signal of the NB-IoT standard to the remaining resources. According to the above embodiment, since the downlink signals of the NR standard (e.g., NR TRS) and the downlink signals of the NB-IoT standard can be allocated together within the PRB, the reduction in data rate of the NB-IoT standard can be minimized.

[0107] Figure 8A This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the eMTC standard to coexist.

[0108] Figure 8B This paper illustrates a resource allocation scheme that avoids conflicts by allowing the NR standard and the eMTC standard to coexist.

[0109] Reference Figure 8A and Figure 8B When downlink signals of the NR standard (e.g., NR TRS) and downlink signals of the eMTC standard are configured to be allocated to the same resources, the base station 110 can change the resource allocation scheme of the eMTC standard.

[0110] Reference Figure 8A Example 810 represents the resource plane of PRB#51 for the NR standard and resource 541 for the eMTC standard. As mentioned above, the RE indexes of the NR standard and the eMTC standard may not be set to the same in PRB#51 for the NR standard and resource 541 for the eMTC standard. The resource plane is exemplary and can be configured similarly in other PRBs. For example, the PRBs of the NR standard (e.g., PRB#26 to PRB#51) arranged in the higher frequency band 540 and the resource planes corresponding to those PRBs and used for the eMTC standard can be configured as in Example 810.

[0111] For example, T0 and T1 represent resources through which a Tracking Reference Signal (TRS) (hereinafter referred to as NRTRS) according to the NR standard is transmitted. NR TRS can be transmitted through resources (or resource elements (REs)) indicated by T0 and / or T1. Downlink data of the eMTC standard (e.g., Machine Type Communication Physical Downlink Shared Channel (MPDSCH)) can be transmitted through resources within a resource block (RB) according to resource index number y. Resource index number y can be configured sequentially within the RB. R0 can represent eMTC reference signal #0 (or demodulation reference signal (DMRS) #0) associated with antenna port #0 (or the first antenna port). R1 ​​can represent eMTC reference signal #1 (or DMRS #1) associated with antenna port #1 (or the second antenna port). R2 can represent eMTC reference signal #2 (or DMRS #2) associated with antenna port #2 (or the third antenna port). R3 can represent eMTC reference signal #3 (or DMRS #3) associated with antenna port #3 (or the fourth antenna port).

[0112] For example, a collision may occur when the RE for NR TRS and the RE for eMTC standard downlink data are set to the same value in the Nth time slot. Base station 110 can transmit NR TRS in symbol index #4 (or symbol index #8). Base station 110 can also transmit NR TRS using REs based on NR standard RE indices #3, #7, and #11. Base station 110 can also transmit NR TRS using REs based on eMTC standard RE indices #2, #6, and #10.

[0113] Base station 110 can be different from Figure 6The resource allocation scheme shown allocates downlink signals for the eMTC standard. Base station 110 can allocate downlink signals for the eMTC standard in the Nth time slot, even if NR TRS is transmitted in the Nth time slot. Base station 110 may choose not to allocate downlink signals for the eMTC standard to the RE (or resource) transmitting NR TRS, and may only allocate downlink signals for the remaining REs.

[0114] For example, base station 110 can allocate downlink signals (or downlink data) of the eMTC standard sequentially according to the symbol index and RE index. For example, base station 110 can allocate downlink data of the eMTC standard sequentially within symbol index #0 according to the RE index of the eMTC standard. Base station 110 can allocate downlink data #0 of the eMTC standard within the RE index #0 of the eMTC standard at symbol index #0. Base station 110 can allocate downlink data #11 of the eMTC standard within the RE index #11 of the eMTC standard at symbol index #0.

[0115] The index for eMTC downlink data can be incremented among the remaining REs other than the RE that transmits the NR TRS. Base station 110 can omit allocating eMTC downlink data in the RE allocated for the NR TRS and can allocate eMTC downlink data in the next RE. For example, in symbol index #4, eMTC downlink data #49 can be transmitted through the RE according to eMTC standard RE index #1. In symbol index #4, the RE according to eMTC standard RE index #2 can be allocated for the NR TRS. In symbol index #4, base station 110 can choose not to allocate eMTC standard downlink data in the RE according to eMTC standard RE index #2. In symbol index #4, eMTC downlink data #51 can be transmitted through the RE according to eMTC standard RE index #3.

[0116] Reference Figure 8B Example 820 illustrates the resource planes of PRB#0 for the NR standard and resource 531 for the eMTC standard. In PRB#0 for the NR standard and resource 531 for the eMTC standard, the RE indexes for the NR standard and the eMTC standard can be set to the same. The resource planes are exemplary and can be configured similarly in other PRBs. For example, resource planes corresponding to PRBs arranged in lower frequency bands 530 (e.g., PRB#0 to PRB#25) and resources used for the eMTC standard can be configured as in Example 820.

[0117] For example, a collision may occur when the RE of the NR TRS and the RE of the eMTC standard downlink data are set to the same value in the Nth time slot. Base station 110 can transmit the NR TRS in symbol index #4 (or symbol index #8). Base station 110 can also transmit the NR TRS using REs based on NR standard RE index #2, NR standard RE index #6, and NR standard RE index #10. Base station 110 can also transmit the NR TRS using REs based on eMTC standard RE index #2, eMTC standard RE index #6, and eMTC standard RE index #10.

[0118] Base station 110 can be different from Figure 6 The resource allocation scheme shown allocates downlink signals for the eMTC standard. Base station 110 can allocate downlink signals for the eMTC standard in the Nth time slot, even if NR TRS is transmitted in the Nth time slot. Base station 110 may not allocate downlink signals for the eMTC standard to the RE (or resource) transmitting NR TRS, and may allocate downlink signals for the eMTC standard only to the remaining REs.

[0119] For example, base station 110 can allocate downlink signals (or downlink data) of the eMTC standard sequentially according to the symbol index and RE index. For example, base station 110 can allocate downlink data of the eMTC standard sequentially within symbol index #0 according to the RE index of the eMTC standard. Base station 110 can allocate downlink data #0 of the eMTC standard to the RE in symbol index #0 according to the RE index #0 of the eMTC standard. Base station 110 can allocate downlink data #11 of the eMTC standard to the RE in symbol index #0 according to the RE index #11 of the eMTC standard.

[0120] The index for eMTC downlink data can be incremented among the remaining REs other than the RE that transmits NR TRS. Base station 110 can omit allocating eMTC downlink data in the RE allocated for NR TRS and can allocate eMTC downlink data in the next RE. For example, in symbol index #4, eMTC downlink data #49 can be transmitted through the RE with RE index #1 according to the eMTC standard (or NR standard). In symbol index #4, the RE with RE index #2 according to the eMTC standard (or NR standard) can be allocated for NR TRS. In symbol index #4, base station 110 can choose not to allocate eMTC standard downlink data in the RE with RE index #2 according to the eMTC standard (or NR standard). In symbol index #4, eMTC downlink data #51 can be transmitted through the RE with RE index #3 according to the eMTC standard.

[0121] Reference Figure 8A and Figure 8BWhen downlink signals of the NR standard (e.g., NR TRS) and the eMTC standard are configured to be allocated to the same resource (or RE), base station 110 can first allocate the downlink signal of the NR standard (e.g., NR TRS) and can allocate the downlink signal of the eMTC standard to the remaining resources. According to the above embodiment, since the downlink signal of the NR standard (e.g., NR TRS) and the downlink signal of the eMTC standard can be allocated together within the PRB, the reduction in data rate of the eMTC standard can be minimized.

[0122] Figure 9 It is a flowchart of the base station's operation of allocating resources related to data associated with the first radio access technology (RAT) and data associated with the second RAT.

[0123] Reference Figure 9 In operation 910, base station 110 may perform data processing related to a first radio access technology (RAT) (e.g., NR). For example, base station 110 may perform processing on data to be sent to a terminal configured based on the first RAT.

[0124] In operation 920, base station 110 may store data related to the first RAT in a buffer (or memory) based on this processing. Base station 110 may store data related to the first RAT in the buffer before allocating resources for the data related to the first RAT. For example, the data related to the first RAT may include data for configuring reference signals related to the first RAT.

[0125] In operation 930, base station 110 can perform data processing related to the second RAT (e.g., NB-IoT or eMTC). For example, base station 110 can perform processing on data to be sent to a terminal configured based on the second RAT.

[0126] In operation 940, base station 110 may store data related to the second RAT in a buffer based on this process. Base station 110 may store data related to the second RAT in the buffer before allocating resources for the data. For example, the data related to the second RAT may include data for configuring reference signals related to the second RAT and data related to information to be sent to terminals configured based on the second RAT.

[0127] In operation 950, base station 110 can perform resource allocation for data associated with the first RAT and data associated with the second RAT. For example, base station 110 can identify (or obtain) data associated with the first RAT and data associated with the second RAT stored in a buffer. Base station 110 can perform resource allocation such that data associated with the first RAT and data associated with the second RAT are transmitted within one time slot.

[0128] For example, base station 110 may allocate data related to the first RAT to resources prioritizing data related to the second RAT. Among multiple REs configured as resources for the second RAT, base station 110 may allocate data related to the first RAT to at least one RE. Base station 110 may allocate data related to the second RAT to the remaining REs other than the at least one RE. Base station 110 may use the at least one RE to transmit data related to the first RAT and may use the remaining REs to transmit data related to the second RAT.

[0129] A terminal configured with a second RAT can identify at least one RE transmitting data associated with the first RAT (e.g., NR TRS) as data associated with the second RAT. The terminal can demodulate and decode the data associated with the first RAT. The data associated with the first RAT may act as interference during decoding.

[0130] For example, the coding rate of data associated with the second RAT may be low. Therefore, even if the data associated with the first RAT acts as interference, the terminal can decode the data associated with the second RAT based on the error recovery process of the terminal's channel decoder. For example, the data associated with the second RAT can be repeatedly transmitted through multiple time slots. Therefore, even if the data associated with the first RAT acts as interference, the terminal configured based on the second RAT can decode the data associated with the second RAT.

[0131] For example, even when data associated with the first RAT and data associated with the second RAT are sent within the same time slot (or one PRB), a terminal configured based on the second RAT can still decode the data associated with the second RAT.

[0132] According to the above embodiments, the reduction in data rate of data associated with the second RAT can be minimized without degrading the performance of the terminal based on the second RAT configuration. According to the above embodiments, the terminal based on the second RAT configuration may not need to know the RE allocated for data associated with the first RAT (e.g., NR RS or NR TRS). Therefore, the operations according to the above embodiments can be performed without changing upper-layer messages (e.g., Radio Reconfiguration Connection (RRC) messages, Downlink Control Indication (DCI), or downlink allocation information).

[0133] According to an embodiment, when a reference signal associated with a first RAT and a reference signal associated with a second RAT are configured to be allocated to the same resource (or RE), the base station 110 can perform resource allocation so that the reference signal associated with the first RAT is transmitted. The terminal configured based on the first RAT can perform data processing without loss.

[0134] According to an embodiment, base station 110 can identify in which time slot data associated with a first RAT (or reference signal) and data associated with a second RAT collide. Base station 110 can perform resource allocation using collision avoidance configuration information and information indicating the RBs where the collision occurred.

[0135] The specific operations of base station 110 in performing resource allocation of data related to the first RAT and data related to the second RAT according to operation 950 will be discussed later. Figure 10 As described in the text.

[0136] Figure 10 It is a flowchart of the base station's operation of allocating resources related to data associated with the first radio access technology (RAT) and data associated with the second RAT.

[0137] Reference Figure 10 In operation 1001, base station 110 can check (or identify) whether the first RAT and the second RAT coexist. For example, base station 110 can check (or identify) whether the first RAT and the second RAT coexist by checking whether data needs to be sent to terminals configured based on the first RAT and terminals configured based on the second RAT.

[0138] In operation 1002, when the first RAT and the second RAT coexist, base station 110 can check (or identify) whether a conflict occurs in the same time slot. Base station 110 can check (or identify) whether a conflict occurs in the same time slot by checking whether the time slot for transmitting data related to the first RAT and the time slot for transmitting data related to the second RAT are the same.

[0139] In operation 1003, when a conflict occurs in the same time slot, base station 110 can check (or identify) whether the conflict occurs in the same RB. Base station 110 can check (or identify) whether the conflict occurs in the same RB by checking whether the RB that transmits data related to the first RAT and the RB that transmits data related to the second RAT are the same.

[0140] In operation 1004, when a collision occurs in the same RB, base station 110 can check (or identify) whether the collision occurs in the same RE. Base station 110 can check (or identify) whether the collision occurs in the same RE by checking whether the RE that transmits data related to the first RAT and the RE that transmits data related to the second RAT are the same.

[0141] In operation 1005, when a conflict occurs in the same RE, base station 110 can check (or identify) whether the data assigned to the RE is related to the second RAT.

[0142] In operation 1006, when the data allocated to an RE is data related to a second RAT, base station 110 can skip the resource allocation for the data related to the second RAT and can increment the resource index related to the second RAT. Base station 110 can skip the resource allocation for the data related to the second RAT based on the identification that the RE for data related to the first RAT and the RE for data related to the second RAT are the same. Base station 110 can increment the resource index related to the second RAT without allocating the data related to the second RAT to the corresponding RE.

[0143] According to an embodiment, base station 110 can perform operation 1005 again after performing operation 1006.

[0144] In operation 1007, when the first RAT and the second RAT do not coexist, base station 110 can perform resource allocation for one of the data associated with the first RAT and the data associated with the second RAT. When the conflict does not occur in the same time slot, base station 110 can perform resource allocation for one of the data associated with the first RAT and the data associated with the second RAT. When the conflict does not occur in the same RB, base station 110 can perform resource allocation for one of the data associated with the first RAT and the data associated with the second RAT. When the conflict does not occur in the same RE, base station 110 can perform resource allocation for one of the data associated with the first RAT and the data associated with the second RAT.

[0145] In operation 1008, base station 110 may increment one of the resource indexes associated with the first RAT and the resource indexes associated with the second RAT. For example, when base station 110 performs resource allocation for data associated with the first RAT, base station 110 may increment the resource index associated with the first RAT. For example, when base station 110 performs resource allocation for data associated with the second RAT, base station 110 may increment the resource index associated with the second RAT.

[0146] In operation 1009, base station 110 can check (or identify) whether resource allocation is complete. Base station 110 can check whether resource allocation is completed within a time slot.

[0147] According to an embodiment, when resource allocation is not completed, base station 110 can perform operation 1001 again.

[0148] In operation 1010, when resource allocation is complete, base station 110 can stop resource allocation. Base station 110 can stop resource allocation and can use the allocated data resources to send signals.

[0149] Figure 11 This is a flowchart of the base station operation.

[0150] Reference Figure 11 In operation 1110, base station 110 can determine resource elements in which a plurality of first resource elements (REs) configured for a first RAT and a plurality of second resource elements configured for a second RAT overlap within a specified time slot. For example, base station 110 can identify a plurality of first resource elements (REs) configured for a first RAT and a plurality of second resource elements configured for a second RAT that are included in the same RB in the same time slot. Base station 110 can identify that the plurality of first resource elements and the plurality of second resource elements overlap. Base station 110 can determine overlapping resource elements in which the plurality of first resource elements and the plurality of second resource elements overlap. For example, the first RAT may include NR. The second RAT may include NB-IoT or eMTC. For example, the plurality of first resource elements may be configured based on a bandwidth (or BWP) of 100MHz or less. For example, the plurality of second resource elements may be configured based on a bandwidth of 180kHz.

[0151] According to an embodiment, a plurality of second resource elements may correspond to at least a portion or all of a plurality of first resource elements. For example, the plurality of second resource elements may be arranged at the periphery of a frequency band associated with the plurality of first resource elements. When the plurality of second resource elements correspond to the plurality of first resource elements, overlapping resource elements may correspond to each of the plurality of first resource elements and the plurality of second resource elements.

[0152] According to an embodiment, multiple second resource elements may not correspond to multiple first resource elements. When multiple second resource elements do not correspond to multiple first resource elements, overlapping resource elements may correspond to at least a portion of the multiple first resource elements.

[0153] In operation 1120, base station 110 may determine, among overlapping resource elements, at least one resource element for transmitting at least one reference signal associated with a first RAT. Downlink signals associated with the first RAT and downlink signals associated with a second RAT may be configured to be transmitted within a single time slot. Base station 110 may identify that at least one reference signal associated with the first RAT will be transmitted. Base station 110 may first determine at least one resource element for transmitting at least one reference signal associated with the first RAT.

[0154] For example, at least one reference signal may include a channel state information reference signal (CSI-RS) related to terminal mobility. The CSI-RS related to terminal mobility may be referred to as a tracking reference signal (TRS). For example, at least one reference signal may be allocated based on a specified frequency interval within the system bandwidth. At least one reference signal may be configured to be transmitted based on a specified frequency interval within the system bandwidth. At least one reference signal may be configured to be transmitted according to a RE indicated by a specified index.

[0155] In operation 1130, base station 110 may allocate downlink signals associated with the second RAT to the remaining resource elements among a plurality of second resource elements, excluding the at least one resource element. For example, base station 110 may identify at least one resource element among the plurality of second resource elements for transmitting at least one reference signal associated with the first RAT. Base station 110 may identify the remaining resource elements among the plurality of second resource elements, excluding the identified at least one resource element. Base station 110 may allocate downlink signals associated with the second RAT to the remaining resource elements.

[0156] For example, the downlink signal associated with the second RAT may include downlink data and at least one reference signal associated with the second RAT. For example, when the second RAT is NB-IoT, the at least one reference signal may include an NB reference signal (NRS). For example, when the second RAT is eMTC, the at least one reference signal may include an eMTC reference signal (or DMRS).

[0157] For example, base station 110 can identify first index information for indicating at least one resource element allocated for at least one reference signal associated with a first RAT among a plurality of first resource elements. Base station 110 can identify second index information for indicating the at least one resource element among a plurality of second resource elements. For example, when the plurality of second resource elements correspond to the plurality of first resource elements, the second index information may correspond to the first index information. For example, when the plurality of second resource elements do not correspond to the plurality of first resource elements, the second index information may differ from the first index information. When the plurality of second resource elements differ from the plurality of first resource elements, the second index information may differ from the first index information.

[0158] In operation 1140, base station 110 can transmit the at least one reference signal associated with the first RAT through the at least one resource element, and can transmit downlink signals associated with the second RAT through the remaining resource elements of the plurality of second resource elements other than the at least one resource element.

[0159] For example, base station 110 can transmit at least one reference signal associated with the first RAT through the at least one resource element within a PRB. Base station 110 can transmit downlink signals associated with the second RAT through the remaining resource elements of the plurality of second resource elements other than the at least one resource element.

[0160] For example, a terminal configured with a second RAT can receive at least one reference signal associated with the first RAT and a downlink signal associated with the second RAT. The terminal configured with the second RAT can identify the at least one reference signal associated with the first RAT as interference. Even if the at least one reference signal associated with the first RAT is identified as interference, the terminal can decode the downlink signal associated with the second RAT because it is transmitted to the terminal based on repeated transmissions.

[0161] According to an embodiment, base station 110 can identify that overlapping resource elements in which the plurality of first resource elements and the plurality of second resource elements overlap do not exist. Based on the identification that overlapping resource elements do not exist, base station 110 can transmit downlink signals related to the second RAT through the plurality of second resource elements.

[0162] Figure 12 A functional configuration of an electronic device according to an embodiment is shown. Hereinafter, the terms "...unit" and "...device" refer to a unit for processing at least one function or operation, and may be implemented as hardware, software, or a combination of hardware and software. Figure 12 The electronic device 1200 can be an example of the aforementioned base station 110. Figure 12 The electronic device 1200 may be included in the base station 110.

[0163] Reference Figure 12 The electronic device 1200 includes a transceiver 1210, a memory 1220, and a processor 1230.

[0164] Transceiver 1210 can perform the function of transmitting and receiving signals in a wired communication environment. Transceiver 1210 may include a wired interface for direct connection between control devices via a transmission medium (e.g., copper wire, optical fiber). Transceiver 1210 may support an N2 interface. For example, transceiver 1210 can transmit electrical signals to base station nodes (e.g., gNB, gNB-CU, gNB-CU-CP) via copper wire, or can perform conversion between electrical and optical signals. Electronic device 1200 can connect to one or more base stations via transceiver 1210. For example, transceiver 1210 can send paging messages to the corresponding base station.

[0165] Transceiver 1210 can also perform the function of transmitting and receiving signals in a wireless communication environment. Transceiver 1210 can support the N1 interface. Electronic device 1200 can support NAS signaling through transceiver 1210. Electronic device 1200 can send NAS messages to UE through transceiver 1210. For example, transceiver 1210 can receive registration request messages from UE. Transceiver 1210 can send registration acceptance messages to UE.

[0166] Transceiver 1210 transmits and receives signals as described above. Therefore, all or part of transceiver 1210 may be referred to as a "communication unit," "transmitting unit," "receiving unit," or "transceiver unit." Furthermore, in the following description, transmission and reception via a wireless channel means that the processing described above is performed by transceiver 1210. Although Figure 12 Only transceiver 1210 is shown in the figure, but according to another implementation example, electronic device 1200 may include two or more transceivers.

[0167] Although not in Figure 12 As shown, transceiver 1210 may also include a transceiver for connecting to another entity in the core network. The transceiver provides an interface for communicating with other nodes in the network. That is, the backhaul transceiver converts a bit stream transmitted from a base station into physical signals for another access node, another base station, an upper-layer node, the core network, etc., and converts physical signals received from another node back into a bit stream.

[0168] Memory 1220 stores data such as basic programs, application programs, and configuration information for the operation of the electronic device. Memory 1220 may be referred to as a storage unit. Memory 1220 may be configured as volatile memory, non-volatile memory, or a combination of volatile and non-volatile memory. Memory 1220 provides stored data according to requests from processor 1230.

[0169] Processor 1230 controls the overall operation of the electronic device. Processor 1230 can be referred to as a control unit. For example, processor 1230 sends and receives signals via transceiver 1210 (or via a backhaul communication unit). Furthermore, processor 1230 records data in memory 1220 and reads data from memory 1220. Processor 1230 can perform the functions of the protocol stack required in the communication standard. Although... Figure 12 Only processor 1230 is shown in the figure, but according to another implementation example, electronic device 1200 may include two or more processors.

[0170] Figure 12 The configurations of the electronic devices shown are merely examples, and examples of electronic devices used to perform embodiments of this disclosure are not limited to those described above. Figure 12 The configuration is shown in the figure. In some embodiments, parts of the configuration may be added, removed, or changed.

[0171] According to an embodiment, a base station device (e.g., base station 110) may include a transceiver, at least one processor including processing circuitry, and a memory including one or more storage media storing instructions. When executed individually or jointly by at least one processor, the instructions may cause the device to determine overlapping resource elements, wherein a plurality of first resource elements configured for a first radio access technology (RAT) overlap with a plurality of second resource elements configured for a second RAT different from the first RAT in a specified time slot. When executed individually or jointly by at least one processor, the instructions may cause the device to determine, among the overlapping resource elements, at least one resource element for transmitting at least one reference signal associated with the first RAT. When executed individually or jointly by at least one processor, the instructions may cause the device to allocate downlink signals associated with the second RAT to the remaining resource elements among the plurality of second resource elements other than the at least one resource element. When executed individually or jointly by at least one processor, the instructions may cause the device to transmit the at least one reference signal associated with the first RAT through the at least one resource element and transmit downlink signals associated with the second RAT through the remaining resource elements among the plurality of second resource elements other than the at least one resource element. The first RAT may include a new radio (NR). The second RAT may include narrowband Internet of Things (NB-IoT) or enhanced machine-type communication (eMTC).

[0172] For example, the at least one reference signal may include a channel state information reference signal (CSI-RS) related to terminal mobility.

[0173] For example, the at least one reference signal can be allocated based on a specified frequency interval in the system bandwidth.

[0174] For example, when executed by at least one processor individually or jointly, the instructions may enable the device to identify that overlapping resource elements, where the plurality of first resource elements overlap with the plurality of second resource elements, do not exist. When executed by at least one processor individually or jointly, the instructions may enable the device to send downlink signals related to the second RAT through the plurality of second resource elements based on the identification that overlapping resource elements do not exist.

[0175] For example, when executed by at least one processor individually or jointly, the instructions may cause the device to identify first index information indicating at least one of the plurality of first resource elements. When executed by at least one processor individually or jointly, the instructions may cause the device to identify second index information indicating at least one of the plurality of second resource elements.

[0176] For example, when the multiple second resource elements correspond to the multiple first resource elements, the second index information may correspond to the first index information.

[0177] For example, if the multiple second resource elements do not correspond to the multiple first resource elements, the second index information may be different from the first index information.

[0178] For example, the downlink signal associated with the second RAT may include downlink data and at least one reference signal associated with the second RAT.

[0179] For example, when executed by at least one processor alone or together, the instructions can cause the device to send downlink signals associated with the second RAT to the terminal based on repeated transmissions.

[0180] For example, the multiple second resource elements can be configured based on a bandwidth of 180kHz.

[0181] According to an embodiment, a method performed by a base station device may include determining overlapping resource elements, wherein a plurality of first resource elements configured for a first radio access technology (RAT) overlap with a plurality of second resource elements configured for a second RAT different from the first RAT in a specified time slot. The method may include determining, among the overlapping resource elements, at least one resource element for transmitting at least one reference signal associated with the first RAT. The method may include allocating downlink signals associated with the second RAT to the remaining resource elements among the plurality of second resource elements other than the at least one resource element. The method may include transmitting the at least one reference signal associated with the first RAT through the at least one resource element, and transmitting the downlink signals associated with the second RAT through the remaining resource elements among the plurality of second resource elements other than the at least one resource element. The first RAT may include a new radio (NR). The second RAT may include narrowband Internet of Things (NB-IoT) or enhanced machine-type communication (eMTC).

[0182] For example, the at least one reference signal may include a channel state information reference signal (CSI-RS) related to terminal mobility.

[0183] For example, the at least one reference signal can be allocated based on a specified frequency interval in the system bandwidth.

[0184] For example, the method may include identifying that no overlapping resource element exists between the plurality of first resource elements and the plurality of second resource elements. The method may also include, based on the identification that no overlapping resource element exists, transmitting downlink signals related to a second RAT through the plurality of second resource elements.

[0185] For example, the method may include identifying first index information indicating at least one resource element among the plurality of first resource elements. The method may also include identifying second index information indicating at least one resource element among the plurality of second resource elements.

[0186] For example, when the multiple second resource elements correspond to the multiple first resource elements, the second index information may correspond to the first index information.

[0187] For example, if the multiple second resource elements do not correspond to the multiple first resource elements, the second index information may be different from the first index information.

[0188] For example, the downlink signal associated with the second RAT may include downlink data and at least one reference signal associated with the second RAT.

[0189] For example, the method may include sending downlink signals associated with a second RAT to the terminal based on repeated transmissions.

[0190] For example, the multiple second resource elements can be configured based on a bandwidth of 180kHz.

[0191] The methods described in the embodiments of this disclosure or specification can be implemented as hardware, software, or a combination of hardware and software.

[0192] In the case of a software implementation, a computer-readable storage medium may be provided for storing one or more programs (software modules). The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs include instructions that, when executed by the electronic device, cause the electronic device to perform a method according to an embodiment described in the claims or specification of this disclosure. The one or more programs may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., an optical disc read-only memory (CD-ROM)), or distributed online (e.g., downloaded or uploaded) through an app store (e.g., Play Store™), or distributed directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily generated or at least temporarily stored in a machine-readable storage medium, such as the memory of a manufacturer's server, an app store's server, or a relay server.

[0193] Such programs (software modules, software) can be stored in random access memory, including non-volatile memory such as flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), disk storage devices, optical disc read-only memory (CD-ROM), optical storage devices (Digital Versatile Optical Disc (DVD) or other formats), or magnetic tape. Alternatively, it can be stored in a memory configured with a combination of some or all of these. Furthermore, multiple configuration memories may be included.

[0194] Furthermore, the program can be stored in an attachable storage device accessible via a communication network (e.g., the Internet, intranet, local area network (LAN), wide area network (WAN), or storage area network (SAN), or a combination thereof). Such a storage device can be connected to the device executing embodiments of this disclosure via an external port. Additionally, a separate storage device on the communication network can also be connected to the device executing embodiments of this disclosure.

[0195] In the specific embodiments of this disclosure described above, components included in the disclosure are expressed in a singular or plural form depending on the specific embodiments presented. However, the singular or plural expression is suitably chosen to suit the circumstances presented for ease of explanation, and this disclosure is not limited to singular or plural components; even components expressed in a plural form may be configured as singular, or components expressed in a singular form may be configured as plural.

[0196] According to various embodiments, one or more of the components or operations described above may be omitted, or one or more other components or operations may be added. Alternatively, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, the integrated component can still perform one or more functions of each of the multiple components in the same or similar manner as the corresponding component of the multiple components before integration. According to various embodiments, operations performed by modules, programs, or other components may be performed sequentially, in parallel, repeatedly, or heuristically, or one or more operations may be performed in a different order or omitted, or one or more other operations may be added.

[0197] Furthermore, specific embodiments have been described in the detailed description of this disclosure above, and various modifications can be made without departing from the scope of this disclosure.

Claims

1. A base station device, comprising: transceiver; At least one processor, including processing circuitry; and Memory, including one or more storage media that store instructions; as well as Wherein, when the instructions are executed individually or jointly by the at least one processor, the device: Identify overlapping resource elements in a specified time slot where a plurality of first resource elements configured for a first radio access technology (RAT) and a plurality of second resource elements configured for a second RAT overlap, wherein the second RAT is different from the first RAT. Among the overlapping resource elements, at least one resource element is determined for transmitting at least one reference signal associated with the first RAT. The downlink signal associated with the second RAT is assigned to the remaining resource elements among the plurality of second resource elements, excluding the at least one resource element. The at least one reference signal associated with the first RAT is transmitted through the at least one resource element, and the downlink signal associated with the second RAT is transmitted through the remaining resource elements among the plurality of second resource elements other than the at least one resource element.

2. The device according to claim 1, wherein, The at least one reference signal includes a channel state information reference signal (CSI-RS) related to terminal mobility.

3. The device according to claim 2, wherein, The at least one reference signal is allocated based on a specified frequency interval in the system bandwidth.

4. The device according to claim 1, wherein, When the instructions are executed individually or jointly by the at least one processor, the device: Identify that the overlapping resource elements where the plurality of first resource elements overlap with the plurality of second resource elements do not exist, and Based on the identification that the overlapping resource element does not exist, downlink signals related to the second RAT are sent through the plurality of second resource elements.

5. The device according to claim 1, wherein, When the instructions are executed individually or jointly by the at least one processor, the device: Identify first index information used to indicate at least one of the plurality of first resource elements, and Identify second index information used to indicate at least one of the plurality of second resource elements.

6. The device according to claim 5, wherein, When the plurality of second resource elements correspond to the plurality of first resource elements, the second index information corresponds to the first index information.

7. The device according to claim 5, wherein, When the plurality of second resource elements do not correspond to the plurality of first resource elements, the second index information is different from the first index information.

8. The device according to claim 1, wherein, The downlink signals associated with the second RAT include downlink data and at least one reference signal associated with the second RAT.

9. The device according to claim 1, wherein, When the instruction is executed individually or jointly by the at least one processor, the device causes the device to send downlink signals related to the second RAT to the terminal based on repeated transmissions.

10. The device according to claim 1, wherein, The plurality of second resource elements are configured based on a 180 kHz bandwidth.

11. A method performed by a base station device, comprising: Identify overlapping resource elements in a specified time slot where a plurality of first resource elements configured for a first radio access technology (RAT) and a plurality of second resource elements configured for a second RAT overlap, wherein the second RAT is different from the first RAT. Among the overlapping resource elements, at least one resource element is determined for transmitting at least one reference signal associated with the first RAT. The downlink signal associated with the second RAT is assigned to the remaining resource elements among the plurality of second resource elements, excluding the at least one resource element. The at least one reference signal associated with the first RAT is transmitted through the at least one resource element, and the downlink signal associated with the second RAT is transmitted through the remaining resource elements among the plurality of second resource elements other than the at least one resource element.

12. The method according to claim 11, wherein, The at least one reference signal includes a channel state information reference signal (CSI-RS) related to terminal mobility.

13. The method according to claim 12, wherein, The at least one reference signal is allocated based on a specified frequency interval in the system bandwidth.

14. The method according to claim 11, wherein, The method further includes: Identify that the overlapping resource elements where the plurality of first resource elements overlap with the plurality of second resource elements do not exist, and Based on the identification that the overlapping resource element does not exist, downlink signals related to the second RAT are sent through the plurality of second resource elements.

15. The method according to claim 11, wherein, The method further includes: Identify first index information used to indicate at least one of the plurality of first resource elements, and Identify second index information used to indicate at least one of the plurality of second resource elements.

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