Method and device for configuring resource for terminal

Abstract

Provided are a method and a device for configuring a resource for a terminal in a wireless communication system. The terminal: receives, from a reader, information about a first resource used for transmitting a carrier wave providing power, and offset information based on the first resource; and performs a frequency shift by using the received offset information. Thereafter, the terminal transmits data to the reader by using a second resource based on the shifted frequency.

Description

Method and device for setting resources for a terminal

[0001] This specification relates to wireless communications applicable to 5G NR, 5G-Advanced and 6G.

[0002] As more and more communication devices demand ever-increasing communication traffic, the need for next-generation 5G systems, which offer enhanced wireless broadband communication capabilities over existing LTE systems, is growing. This next-generation 5G system, known as NewRAT, differentiates communication scenarios into Enhanced Mobile BroadBand (eMBB), Ultra-reliability and low-latency communication (URLLC), and Massive Machine-Type Communications (mMTC).

[0003] Here, eMBB is a next-generation mobile communication scenario with characteristics such as High Spectrum Efficiency, High User Experienced Data Rate, and High Peak Data Rate; URLLC is a next-generation mobile communication scenario with characteristics such as Ultra Reliable, Ultra Low Latency, and Ultra High Availability (e.g., V2X, Emergency Service, and Remote Control); and mMTC is a next-generation mobile communication scenario with characteristics such as Low Cost, Low Energy, Short Packet, and Massive Connectivity (e.g., IoT (Internet of Things)).

[0004] An object of the present specification is to provide a method and device for efficiently setting resources for a terminal in a wireless communication system.

[0005] One embodiment of the present specification provides a method for a wireless communication system in which a terminal receives information regarding a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource, and performs a frequency shift using the received offset information. Thereafter, the terminal transmits data through a second resource based on the performed frequency shift.

[0006] In addition, one embodiment of the present specification provides a method for a wireless communication system in which a reader transmits information regarding a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource. Thereafter, the reader receives data through a second resource based on a frequency shift performed using the transmitted offset information.

[0007] In addition, one embodiment of the present specification provides a wireless communication system comprising at least one processor, and at least one memory storing instructions and being operably electrically connected to the at least one processor, wherein the operations performed based on the instructions being executed by the at least one processor include: receiving information about a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource, and performing a frequency shift using the received offset information. Thereafter, a terminal is provided that transmits data through a second resource based on the performed frequency shift.

[0008] In addition, one embodiment of the present specification provides a wireless communication system comprising at least one processor, and at least one memory storing instructions and being operably electrically connected to the at least one processor, wherein the operations performed based on the instructions being executed by the at least one processor include: transmitting information about a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource. Thereafter, a reader is provided that receives data through a second resource based on a frequency shift performed using the transmitted offset information.

[0009] The second resource may be a specific Physical Device to Reader Channel (PDRCH). Here, the specific PDRCH may be one of multiple PDRCHs. The multiple PDRCHs may be distinguished by frequency domain within the same time domain. Furthermore, the reader may transmit information about the number of PDRCHs to the terminal, and the terminal may receive this information.

[0010] Meanwhile, the offset information may further include frequency shift direction information, and based on the frequency shift direction information, the plurality of PDRCHs may be set in at least one of a higher frequency direction and a lower frequency direction with respect to the first resource.

[0011] On the other hand, the plurality of PDRCHs may be set symmetrically for the first resource based on the offset information.

[0012] The leader can transmit information to the terminal to enable or activate the frequency shift, and the terminal can receive the information.

[0013] According to the disclosure of this specification, there is provided offset information that can efficiently support resources and frequency shift for a carrier wave (CW) for an IoT terminal that transmits data using backscattering in a wireless communication system, thereby avoiding interference that may be received from the CW, thereby improving data transmission and reception performance.

[0014] Figure 1 is a diagram illustrating a wireless communication system.

[0015] Figure 2 illustrates the structure of a radio frame used in NR.

[0016] Figures 3a to 3c are exemplary diagrams showing exemplary architectures for wireless communication services.

[0017] Figure 4 illustrates the slot structure of an NR frame.

[0018] Figure 5 illustrates an example of subframe types in NR.

[0019] Figure 6 illustrates the structure of a self-contained slot.

[0020] Figures 7a to 7e illustrate examples of connectivity topologies for ambient IoT networks and devices.

[0021] Figure 8 is a flowchart illustrating a method of operating a terminal according to one embodiment of the present specification.

[0022] FIGS. 9A and 9B are diagrams for explaining the relationship between PDRCH and CW according to one embodiment of the present specification.

[0023] FIGS. 10A and 10B are diagrams for explaining the relationship between PDRCH and CW according to another embodiment of the present specification.

[0024] Fig. 11 is a flowchart illustrating a method of operating a terminal according to another embodiment of the present specification.

[0025] Fig. 12 is a flowchart illustrating an operation method of a reader according to one embodiment of the present specification.

[0026] Figure 13 illustrates a device according to one embodiment of the present specification.

[0027] Fig. 14 is a block diagram showing the configuration of a terminal according to one embodiment of the present specification.

[0028] Figure 15 shows a block diagram of a processor in which the disclosure of this specification is implemented.

[0029] FIG. 16 is a block diagram showing in detail the transmitter / receiver of the first device illustrated in FIG. 13 or the transmitter / receiver unit of the device illustrated in FIG. 14.

[0030] It should be noted that the technical terms used in this specification are used merely to describe specific embodiments and are not intended to limit the contents of this specification. In addition, unless specifically defined otherwise herein, the technical terms used in this specification should be interpreted as having a meaning generally understood by those skilled in the art to which this specification pertains, and should not be interpreted in an excessively broad or narrow sense. In addition, if a technical term used in this specification is an incorrect technical term that does not accurately express the contents and ideas of this specification, it should be replaced with a technical term that can be correctly understood by a person skilled in the art. In addition, general terms used in this specification should be interpreted according to their dictionary definitions or according to the preceding and following context, and should not be interpreted in an excessively narrow sense.

[0031] Additionally, the singular expressions used herein include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consist of" or "have" should not be construed to necessarily include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0032] Additionally, terms including ordinal numbers, such as "first" and "second," used herein may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a second component, and similarly, a second component could also be referred to as a first component.

[0033] When a component is referred to as being connected or connected to another component, it may be directly connected or connected to that other component, but there may also be other components intervening. Conversely, when a component is referred to as being directly connected or connected to another component, it should be understood that there are no other components intervening.

[0034] Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing reference numerals, identical or similar components will be given the same reference numerals, and redundant descriptions thereof will be omitted. In addition, when describing the contents of this specification, if a detailed description of a related known technology is judged to obscure the gist of this specification, the detailed description thereof will be omitted. In addition, it should be noted that the attached drawings are only intended to make the contents and ideas of this specification easily understandable, and should not be construed as limiting the contents and ideas of this specification by the attached drawings. The contents and ideas of this specification should be construed to extend to all changes, equivalents, and substitutes other than the attached drawings.

[0035] In this specification, “A or B” can mean “only A,” “only B,” or “both A and B.” In other words, “A or B” in this specification can be interpreted as “A and / or B.” For example, “A, B or C” in this specification can mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.”

[0036] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Accordingly, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0037] In this specification, “at least one of A and B” may mean “only A,” “only B,” or “both A and B.” Additionally, in this specification, the expressions “at least one of A or B” or “at least one of A and / or B” may be interpreted identically to “at least one of A and B.”

[0038] Additionally, in this specification, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0039] Additionally, parentheses used in this specification may mean “for example.” Specifically, when “control information (PDCCH)” is indicated, “PDCCH (Physical Downlink Control Channel)” may be suggested as an example of “control information.” In other words, “control information” in this specification is not limited to “PDCCH,” and “PDDCH” may be suggested as an example of “control information.” Furthermore, even when indicated as “control information (i.e., PDCCH),” “PDCCH” may be suggested as an example of “control information.”

[0040] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0041] Although the attached drawing illustrates a UE (User Equipment) as an example, the illustrated UE may also be referred to as a terminal, ME (Mobile Equipment), etc. In addition, the UE may be a portable device such as a laptop, mobile phone, PDA, smart phone, multimedia device, etc., or a non-portable device such as a PC or vehicle-mounted device.

[0042] Hereinafter, the term "UE" is used as an example of a device capable of wireless communication (e.g., a wireless communication device, a wireless device, or a wireless device). The operations performed by the UE can be performed by any device capable of wireless communication. A device capable of wireless communication may also be referred to as a wireless communication device, a wireless device, or a wireless device.

[0043] The term base station used below generally refers to a fixed station that communicates with wireless devices, and can be used as a comprehensive term that includes eNodeB (evolved-NodeB), eNB (evolved-NodeB), BTS (Base Transceiver System), Access Point, gNB (Next generation NodeB), RRH (remote radio head), TP (transmission point), RP (reception point), relay, etc.

[0044] Although this specification describes embodiments using LTE systems, LTE-A systems, and NR systems, these embodiments may be applied to any communication system falling within the above definitions.

[0045] Wireless Communication System

[0046] Building on the success of LTE (long term evolution) / LTE-Advanced (LTE-A) for 4th generation mobile communications, commercialization of the next generation, or 5th generation (so-called 5G) mobile communications, and follow-up research are also ongoing.

[0047] The International Telecommunication Union (ITU) defines 5G mobile communications as providing data transfer speeds of up to 20 Gbps and a perceived transmission speed of at least 100 Mbps everywhere. Its official name is "IMT-2020."

[0048] ITU proposes three usage scenarios: eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communications).

[0049] URLLC addresses usage scenarios that require high reliability and low latency. For example, services such as autonomous driving, factory automation, and augmented reality require high reliability and low latency (e.g., sub-1ms). Current 4G (LTE) latency is statistically 21-43ms (best 10%) and 33-75ms (median). This is insufficient to support services requiring sub-1ms latency. Next, eMBB usage scenarios address usage scenarios that require mobile ultra-wideband.

[0050] In other words, the 5th generation mobile communication system can support higher capacity than the current 4G LTE, increase the density of mobile broadband users, and support D2D (Device to Device), high reliability, and MTC (Machine-type communication). 5G research and development also aims for lower latency and lower battery consumption than 4G mobile communication systems to better implement the Internet of Things. For this 5G mobile communication, a new radio access technology (New RAT or NR) may be proposed.

[0051] The NR frequency band can be defined by two types of frequency ranges (FR1, FR2). The numerical values ​​of the frequency ranges can be changed, and for example, the two types of frequency ranges (FR1, FR2) can be as shown in Table 1 below. For convenience of explanation, among the frequency ranges used in the NR system, FR1 can mean the “sub 6 GHz range”, and FR2 can mean the “above 6 GHz range” and can be called millimeter wave (mmW).

[0052] Frequency Range designationCorresponding frequency rangeSubcarrier SpacingFR1410MHz - 7125MHz15, 30, 60kHzFR224250MHz - 52600MHz60, 120, 240kHz

[0053] The numerical value of the frequency range of the NR system can be changed. For example, FR1 can include a band from 410 MHz to 7125 MHz, as shown in Table 1. That is, FR1 can include frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.). For example, the frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included within FR1 can include unlicensed bands. Unlicensed bands can be used for various purposes, such as for vehicle communications (e.g., autonomous driving).

[0054] Meanwhile, 3GPP-based communication standards define downlink physical channels corresponding to resource elements that carry information originating from upper layers, and downlink physical signals corresponding to resource elements that are used by the physical layer but do not carry information originating from upper layers. For example, the physical downlink shared channel (PDSCH), physical broadcast channel (PBCH), physical multicast channel (PMCH), physical control format indicator channel (PCFICH), physical downlink control channel (PDCCH), and physical hybrid ARQ indicator channel (PHICH) are defined as downlink physical channels, and reference signals and synchronization signals are defined as downlink physical signals. A reference signal (RS), also referred to as a pilot, is a signal with a special predefined waveform known to the gNB and the UE. For example, cell specific RS, UE-specific RS (UE-RS), positioning RS (PRS), and channel state information RS (CSI-RS) are defined as downlink reference signals. The 3GPP LTE / LTE-A standard defines uplink physical channels corresponding to resource elements carrying information originating from higher layers, and uplink physical signals corresponding to resource elements used by the physical layer but not carrying information originating from higher layers.For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are defined as uplink physical channels, and a demodulation reference signal (DMRS) for uplink control / data signals and a sounding reference signal (SRS) used for uplink channel measurement are defined.

[0055] In this specification, PDCCH (Physical Downlink Control CHannel) / PCFICH (Physical Control Format Indicator CHannel) / PHICH ((Physical Hybrid automatic retransmit request Indicator CHannel) / PDSCH (Physical Downlink Shared CHannel) mean a set of time-frequency resources or a set of resource elements that carry DCI (Downlink Control Information) / CFI (Control Format Indicator) / downlink ACK / NACK (ACKnowlegement / Negative ACK) / downlink data, respectively. In addition, PUCCH (Physical Uplink Control CHannel) / PUSCH (Physical Uplink Shared CHannel) / PRACH (Physical Random Access CHannel) mean a set of time-frequency resources or a set of resource elements that carry UCI (Uplink Control Information) / uplink data / random access signals, respectively.

[0056] Figure 1 is a diagram illustrating a wireless communication system.

[0057] As can be seen from FIG. 1, the wireless communication system includes at least one base station (BS). The BS is divided into a gNodeB (or gNB) (20a) and an eNodeB (or eNB) (20b). The gNB (20a) supports 5th generation mobile communications. The eNB (20b) supports 4th generation mobile communications, i.e., long term evolution (LTE).

[0058] Each base station (20a and 20b) provides communication services for a specific geographic area (commonly referred to as a cell) (20-1, 20-2, 20-3). The cell may be further divided into multiple areas (referred to as sectors).

[0059] A UE (user equipment) typically belongs to a single cell, and the cell to which the UE belongs is called a serving cell. The base station that provides communication services for the serving cell is called a serving base station (BS). Since the wireless communication system is a cellular system, there are other cells adjacent to the serving cell. These other cells adjacent to the serving cell are called neighbor cells. The base station that provides communication services to the neighbor cell is called a neighbor BS. The serving cell and neighbor cells are determined relative to the UE.

[0060] Hereinafter, downlink refers to communication from a base station (20) to a UE (10), and uplink refers to communication from a UE (10) to a base station (20). In downlink, the transmitter may be part of the base station (20), and the receiver may be part of the UE (10). In uplink, the transmitter may be part of the UE (10), and the receiver may be part of the base station (20).

[0061] Meanwhile, wireless communication systems can be broadly divided into frequency division duplex (FDD) and time division duplex (TDD). In FDD, uplink and downlink transmissions occupy different frequency bands and occur at different times. In TDD, uplink and downlink transmissions occupy the same frequency band but occur at different times. The channel response in TDD is essentially reciprocal, meaning that the downlink and uplink channel responses are nearly identical in a given frequency range. Therefore, in TDD-based wireless communication systems, the downlink channel response can be derived from the uplink channel response, which is advantageous. In TDD, uplink and downlink transmissions are time-divided across the entire frequency band, so downlink transmission by the base station and uplink transmission by the UE cannot be performed simultaneously. In TDD systems, where uplink and downlink transmissions are divided into subframes, uplink and downlink transmissions are performed in different subframes.

[0062] Figure 2 illustrates the structure of a radio frame used in NR.

[0063] In NR, uplink and downlink transmissions are structured as frames. A radio frame is 10ms long and is defined by two 5ms half-frames (HF). Each half-frame is defined by five 1ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols, depending on the cyclic prefix (CP). When a normal CP is used, each slot contains 14 symbols. When an extended CP is used, each slot contains 12 symbols. Here, the symbols may include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or DFT-s-OFDM symbols).

[0064] Support for various numerologies

[0065] In NR systems, multiple numerologies may be provided to terminals as wireless communication technologies advance. For example, an SCS of 15 kHz supports a wide area in traditional cellular bands. An SCS of 30 kHz / 60 kHz supports dense urban environments, lower latency, and wider carrier bandwidth. An SCS of 60 kHz or higher supports a bandwidth greater than 24.25 GHz to overcome phase noise.

[0066] The above numerology can be defined by the cycle prefix (CP) length and subcarrier spacing (SCS). A single cell can provide multiple numerologies to a terminal. When the numerology index is represented by μ, each subcarrier spacing and the corresponding CP length can be as shown in the table below.

[0067] μ△f=2 μ 15 [kHz]CP015 General 130 General 260 General, Extended 3120 General 4240 General 5480 General 6960 General

[0068] For general CP, when the index of the numerology is represented by μ, the number of OFDM symbols per slot (N slot symb ), number of slots per frame (N frame,μ slot ) and the number of slots per subframe (N subframe,μ slot ) is as shown in the table below.

[0069] μ△f=2 μ 15 [kHz]N slot symb N frame,μ slot N subframe,μ slot 015141011301420226014404312014808424014160165480143203269601464064

[0070] For extended CP, when the index of the numerology is represented by μ, the number of OFDM symbols per slot (N slot symb ), number of slots per frame (N frame,μ slot ) and the number of slots per subframe (N subframe,μ slot ) is as shown in the table below.

[0071] μSCS (15*2 u )N slot symb N frame,μ slot N subframe,μslot 260KHz (u=2)12404

[0072] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells.

[0073] Figures 3a to 3c are exemplary diagrams showing exemplary architectures for wireless communication services.

[0074] Referring to FIG. 3a, the UE is connected to an LTE / LTE-A-based cell and an NR-based cell in a DC (dual connectivity) manner.

[0075] The above NR-based cell is connected to the core network for existing 4th generation mobile communication, i.e. Evolved Packet Core (EPC).

[0076] Referring to FIG. 3b, unlike FIG. 3a, the LTE / LTE-A-based cell is connected to a core network for 5th generation mobile communication, i.e., a 5G core network.

[0077] A service method based on an architecture as illustrated in Figures 3a and 3b above is called NSA (non-standalone).

[0078] Referring to Figure 3c, the UE is connected only to NR-based cells. A service method based on this architecture is called SA (standalone).

[0079] Meanwhile, in the above NR, it may be considered that reception from the base station utilizes a downlink subframe, and transmission to the base station utilizes an uplink subframe. This method can be applied to paired and unpaired spectrums. A pair of spectrums means that two carrier spectrums are included for downlink and uplink operations. For example, in a pair of spectrums, one carrier may include a downlink band and an uplink band that are paired with each other.

[0080] Figure 4 illustrates the slot structure of an NR frame.

[0081] A slot contains multiple symbols in the time domain. For example, in the case of a normal CP, one slot contains 14 symbols, but in the case of an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined as multiple consecutive (physical, P)RBs in the frequency domain, and can correspond to a single numerology (e.g., SCS, CP length, etc.). A terminal can be configured with up to N (e.g., 4) BWPs in the downlink and uplink, respectively. Downlink or uplink transmission is performed through an activated BWP, and at a given time, only one BWP among the BWPs configured for the terminal can be activated. In the resource grid, each element is referred to as a Resource Element (RE), to which one complex symbol can be mapped.

[0082] Figure 5 illustrates an example of subframe types in NR.

[0083] The transmission time interval (TTI) illustrated in FIG. 5 may be referred to as a subframe or slot for NR (or new RAT). The subframe (or slot) of FIG. 5 may be used in a TDD system of NR (or new RAT) to minimize data transmission delay. As illustrated in FIG. 5, a subframe (or slot) includes 14 symbols. The symbols in the front of the subframe (or slot) may be used for a downlink (DL) control channel, and the symbols in the back of the subframe (or slot) may be used for an uplink (UL) control channel. The remaining symbols may be used for DL ​​data transmission or UL data transmission. According to this subframe (or slot) structure, downlink transmission and uplink transmission may be sequentially performed in one subframe (or slot). Therefore, downlink data may be received within a subframe (or slot), and an uplink acknowledgment (ACK / NACK) may be transmitted within the subframe (or slot).

[0084] The structure of these subframes (or slots) can be called self-contained subframes (or slots).

[0085] Specifically, the first N symbols in a slot are used to transmit a DL control channel (hereinafter, DL control region), and the last M symbols in the slot can be used to transmit a UL control channel (hereinafter, UL control region). N and M are each integers greater than or equal to 0. A resource region (hereinafter, data region) between the DL control region and the UL control region can be used for DL ​​data transmission or UL data transmission. For example, a physical downlink control channel (PDCCH) can be transmitted in the DL control region, and a physical downlink shared channel (PDSCH) can be transmitted in the DL data region. A physical uplink control channel (PUCCH) can be transmitted in the UL control region, and a physical uplink shared channel (PUSCH) can be transmitted in the UL data region.

[0086] Using this subframe (or slot) structure has the advantage of minimizing the final data transmission latency by reducing the time required to retransmit data that has experienced reception errors. In this self-contained subframe (or slot) structure, a time gap may be required during the transition from transmit mode to receive mode or from receive mode to transmit mode. To this end, some OFDM symbols during the transition from DL to UL in the subframe structure can be designated as a guard period (GP).

[0087] Figure 6 illustrates the structure of a self-contained slot.

[0088] In an NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL control channel can all be included within a single slot. For example, the first N symbols within a slot can be used to transmit a DL control channel (hereinafter, referred to as a DL control region), and the last M symbols within a slot can be used to transmit a UL control channel (hereinafter, referred to as a UL control region). N and M are each integers greater than or equal to 0. The resource region (hereinafter, referred to as a data region) between the DL control region and the UL control region can be used for DL ​​data transmission or UL data transmission. As an example, the following configuration can be considered. Each section is listed in chronological order.

[0089] 1. DL only configuration

[0090] 2. UL only configuration

[0091] 3. Mixed UL-DL configuration

[0092] - DL area + GP (Guard Period) + UL control area

[0093] - DL control area + GP + UL area

[0094] DL area: (i) DL data area, (ii) DL control area + DL data area

[0095] UL domain: (i) UL data domain, (ii) UL data domain + UL control domain

[0096] In the DL control region, a PDCCH can be transmitted, and in the DL data region, a PDSCH can be transmitted. In the UL control region, a PUCCH can be transmitted, and in the UL data region, a PUSCH can be transmitted. In the PDCCH, downlink control information (DCI), for example, DL data scheduling information, UL data scheduling information, etc., can be transmitted. In the PUCCH, uplink control information (UCI), for example, ACK / NACK (Positive Acknowledgement / Negative Acknowledgement) information for DL ​​data, CSI (Channel State Information) information, SR (Scheduling Request), etc., can be transmitted. GP provides a time gap when a base station and a terminal switch from transmission mode to reception mode or when switching from reception mode to transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as GP.

[0097] Figures 7a to 7e illustrate examples of connectivity topologies for ambient IoT networks and devices.

[0098] In recent years, IoT technology has garnered significant attention in wireless communications. IoT technology has evolved to connect a growing number of objects to enhance industrial productivity and quality of life. Examples include the Narrowband Internet of Things (NB-IoT) and enhanced Machine-Type Communication (eMTC) technologies defined in 3GPP. However, to build a more effective IoT ecosystem, improvements are needed in several areas, including the size, form factor, price, complexity, power consumption, and coverage of IoT devices.

[0099] A representative technology service of the IoT is Radio Frequency Identification (RFID). RFID boasts extremely low complexity and its tags have a very small form factor. However, its reading range is limited to a few meters, providing a very narrow coverage area. Furthermore, handheld scanning is labor-intensive, and the installation costs of RFID portals and gates make deployment expensive. Consequently, RFID has limitations in providing seamless service and coverage in large-scale networks.

[0100] To meet these needs, 3GPP is studying use cases and scenarios for IoT devices that support battery-less or energy harvesting, and is developing technologies to support IoT devices with higher requirements that cannot be met with existing IoT technologies.

[0101] For convenience of explanation, in this specification, an ambient IoT device may be expressed as an ambient IoT terminal, IoT device, IoT terminal, device, apparatus, or terminal.

[0102] A connectivity topology such as FIGS. 7a to 7e can be defined for ambient IoT networks and devices.

[0103] Referring to FIG. 7A, an ambient IoT device communicates directly and bidirectionally with a base station (BS). Communication between the BS and the ambient IoT device includes ambient IoT data and / or signaling. In the topology of FIG. 7A, the BS transmitting to the ambient IoT device may be different from the BS receiving from the ambient IoT device.

[0104] Referring to FIG. 7b, an ambient IoT device communicates bidirectionally with an intermediate node between the device and the base station. The intermediate node in the topology of FIG. 7b may be an ambient IoT-enabled relay, an Integrated Access Backhaul (IAB) node, a UE, a repeater, etc. The intermediate node transmits ambient IoT data and / or signaling between the BS and the ambient IoT device.

[0105] Referring to FIG. 7c, an ambient IoT device transmits data / signaling to a base station and receives data / signaling from an assisting node. Alternatively, as illustrated in FIG. 7d, the ambient IoT device receives data / signaling from a base station and transmits data / signaling to an assisting node. The assisting node in the topology of FIGS. 7c and 7d may be an ambient IoT-enabled relay, IAB, UE, repeater, or the like.

[0106] Referring to FIG. 7e, the ambient IoT device communicates bidirectionally with the UE. Communication between the UE and the ambient IoT device includes transmission of ambient IoT data and / or signaling.

[0107] Ambient IoT devices can be classified into three types:

[0108] 1) Device 1: The device has a peak power consumption of approximately 1 μW or less, includes an energy storage device, and may have an initial sampling frequency offset (SFO) of up to 10X ppm. The device does not include DL and UL signal amplification, and the uplink transmission (UL transmission) is performed by backscattering using an externally provided carrier wave.

[0109] 2) Device 2a: The device has a peak power consumption of up to several hundred μW, includes an energy storage device, and may have an initial sampling frequency offset (SFO) of up to 10X ppm. The device may include DL and / or UL signal amplification capabilities, and the uplink transmission (UL transmission) may be performed by backscattering using an externally provided carrier wave.

[0110] 3) Device 2b: The device has a peak power consumption of up to several hundred μW, includes an energy storage device, and may have an initial sampling frequency offset (SFO) of up to 10X ppm. The device may include DL and / or UL signal amplification capabilities, and the uplink transmission (UL transmission) may be generated directly within the device.

[0111] Meanwhile, the channel transmitted from the device to the reader can be defined as PDRCH (Physical Device to Reader Channel), the channel transmitted from the reader to the device can be defined as PRDCH (Physical Reader to Device Channel), and the uplink transmission of the device can be named D2R transmission, and the downlink transmission of the reader can be named R2D transmission.

[0112] Among the three types classified above, devices of type 1 and 2a transmit data using a backscattering method using a carrier wave (CW). This assumes that the carrier wave can be transmitted within a reader, such as a base station or an intermediate UE, or through a node that radiates a new carrier wave, and that the carrier wave uses the same frequency band (DL or UL) as the D2R transmission.

[0113] In the case of device 1 / 2a devices that transmit data using backscattering using carrier wave (CW), R2D transmission is performed using the power received from a specific node (e.g., gNB, UE, or CW node) that transmits a CW signal at the same time that the device transmits data. However, when the CW signal and the R2D signal are transmitted and received through the same resource, there is a high possibility that the CW signal will interfere with the R2D signal. A method to reduce interference from the CW signal needs to be proposed.

[0114] Figure 8 is a flowchart illustrating a method of operating a terminal according to one embodiment of the present specification.

[0115] The present invention proposes a method for setting carrier wave (CW) and D2R transmission resources for a terminal transmitting data using a backscattering signal. Here, the terminal may be referred to as an ambient IoT device. When a leader (e.g., a base station or an intermediate UE) transmits an R2D command message that triggers D2R data transmission in order to receive data from ambient IoT device(s) having frequency shift capability, it is proposed that the command message include frequency shift offset information for D2R resources transmitted from devices triggered by the command and corresponding CW information. This may include frequency shift offset information for D2R resources (i.e., PDRCH) based on resource information for CW, or may include frequency shift offset information for CW based on D2R resource (i.e., PDRCH) information.

[0116] If a D2R resource has more than one resource information due to frequency division within the same time resource, the number of PDRCHs (n) belonging to the same time resource is additionally notified along with offset information based on CW, thereby allowing the terminal to select one resource.

[0117] Referring to FIG. 8, a terminal receives a message including resource information, offset information, and / or PDRCH number information for a carrier wave (CW) (S801). Thereafter, based on the received message, the terminal transmits data at a location frequency shifted by the offset based on the resource for CW (S802).

[0118] FIGS. 9A and 9B are diagrams for explaining the relationship between PDRCH and CW according to one embodiment of the present specification.

[0119] The PDRCH that can be occupied by one device can be defined to be located in one of the higher frequency / sub-band or the lower frequency / sub-band with respect to CW, as shown in FIGS. 9a and 9b, or to be located symmetrically on both sides with respect to CW.

[0120] FIGS. 10A and 10B are diagrams for explaining the relationship between PDRCH and CW according to another embodiment of the present specification.

[0121] If resources for one or more devices are set in a frequency division multiplexing (FDM) manner in one time resource, one or more PDRCHs can be set as shown in FIGS. 10a and 10b.

[0122] Meanwhile, the present invention proposes to transmit a frequency offset value for a PDRCH and information on the number of PDRCHs corresponding to the frequency offset value based on a CW signal transmitted by a leader (e.g., a base station) or a CW node in a PRDCH. The PRDCH can signal the start of the PRDCH through transmission of a preamble and signal the end of PRDCH transmission through a postamble. Information of the PDRCH corresponding to the PRDCH can be transmitted through the preamble and / or the postamble, or can be included in data transmitted as the PRDCH. The PRDCH can include control information of a higher layer, and this means that information of the PDRCH(s) on which data triggered by the PRDCH can be transmitted can be transmitted including the parameters proposed above through higher layer control information such as a medium access control (MAC) control element (CE) or radio resource control (RRC). When transmitted as MAC CE, a new format for transmitting resource information for PDRCH can be defined, which can be defined in different formats or with different MAC CEs depending on whether it is a contention-based resource (i.e., contention based UL grant) or a device-specific resource (i.e., device-specific UL grant).

[0123] In case of contention-based resources (i.e., contention-based UL grant), one or more resource information may be defined with one or more offsets, and in case of device-specific resources (i.e., device-specific UL grant), identifier information for the device allocated the resource may be defined to be included together. In one embodiment, if a command message notifying the start of information collection for a specific session / group (i.e., Device Originated-Device Terminated Triggered (DO-DTT) traffic) is transmitted on the PRDCH, one or more devices then occupy the resource based on contention and transmit data through the PDRCH. At this time, the contention-based resources (i.e., contention-based UL grant) allocated by the base station are resources corresponding to information for a specific session / group and do not include information for a specific device. However, if a random number (e.g., RN16) or identity information about a device is received from a specific device, it means that a device-specific resource (i.e., a device-specific UL grant) containing the random number or identity information received from the device may be included as a means of notifying resources for the specific device.

[0124] Instructions for transmitting resource information are described in detail below.

[0125] <Point 1. Information on enabling / disabling the frequency shift between the CW signal transmission frequency and the backscattering PDRCH transmission frequency based on it>

[0126] A leader (base station or intermediate terminal) can enable or disable frequency shift between a CW signal and a PDRCH transmission frequency for backscattering PDRCH transmission of an ambient IoT device through PRDCH transmission containing a command (CMD) message. Additionally, when the frequency shift is set to enable, the leader (base station or intermediate terminal) can additionally activate or deactivate the frequency shift for PDRCH transmission. For example, the frequency shift can be activated / deactivated on a per-PDRCH transmission basis of a specific ambient IoT device through a device-specific resource (i.e., a device-specific UL grant).

[0127] However, if the enable / disable setting for the frequency shift is defined (or additionally activation / deactivation is instructed), the leader (base station or intermediate terminal) can additionally set or instruct the frequency offset value according to point 2 described below. Alternatively, an arbitrary fixed frequency offset value may be defined and the frequency offset value may be applied. Alternatively, the frequency offset value may be determined and applied according to the IoT device type or capability.

[0128] <Point 2. CW 시그널 전송 주파수와 PDRCH 전송 주파수 간의 주파수 오프셋 값(frequency offset value) 설정>

[0129] A method for setting a frequency offset value is described when the frequency shift is enabled or activated by Point 1 described above. However, whether or not a frequency shift is applied and the corresponding frequency offset value can be applied according to the frequency offset setting information described below without a separate setting / instruction for enabling / disabling (or activating / deactivating) the frequency shift of Point 1.

[0130] 1) Method 1. Include n (e.g., 2) offset values ​​based on CW resource information and the center frequency of the CW resource.

[0131] This means that n different PDRCHs are configured for higher and lower frequencies symmetrically for CW resources. Regarding Scheme 1, Fig. 10a illustrates the case where n is 2.

[0132] 2) Method 2-1. Includes n offset values ​​based on CW resource information and the center frequency of the CW resource.

[0133] This means that n different PDRCHs are set based on offset values ​​for CW resources. Here, the offset may additionally include a field indicating + or - in the frequency domain. A value indicating + means shifting to a higher frequency by an offset from the CW resource, and a value indicating - means shifting to a lower frequency by an offset from the CW resource. With respect to method 2-1, Fig. 10a illustrates a case where n is 2.

[0134] 3) Method 2-2. Includes n offset values ​​based on CW resource information and the center frequency of the CW resource.

[0135] This means that n different PDRCHs are configured based on offset values ​​for CW resources. Here, the offset means that a single device occupies resources at symmetrical locations for higher / lower frequencies relative to the CW resource. Regarding Scheme 2-2, Fig. 10b illustrates a case where n is 2.

[0136] It is obvious that various modifications are possible, such as the offset value for the frequency shift proposed above may be defined such that one or more offset values ​​for other PDRCH(s) and / or CW are set based on a specific PDRCH (e.g., a PDRCH located at the highest or lowest frequency), and one or more offset values ​​are transmitted to indicate a method for performing frequency shifting for CW and one or more corresponding PDRCHs for one time domain by a command message transmitted from a leader (e.g., a base station).

[0137] In point 2 above, the description was centered on an embodiment of setting or indicating a frequency offset value of a PDRCH transmission resource based on CW resource information. However, the same method can be applied to a case of setting or indicating a frequency offset value of a CW based on PDRCH resource information, and this can also be included in the scope of the present invention.

[0138] In addition, the CW frequency resource information or PDRCH frequency resource information that serves as the basis for the frequency offset setting value may be explicitly or implicitly set by a leader (e.g., a base station or an intermediate terminal), and the present invention is not limited by the specific setting method.

[0139] Fig. 11 is a flowchart illustrating a method of operating a terminal according to another embodiment of the present specification.

[0140] Referring to FIG. 11, the terminal receives information about a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource from the reader (S1101). Then, the terminal performs a frequency shift using the received offset information (S1102). Thereafter, the terminal transmits data to the reader via a second resource based on the performed frequency shift (S1103).

[0141] The second resource may be a specific Physical Device to Reader Channel (PDRCH). Here, the specific PDRCH may be one of multiple PDRCHs. The multiple PDRCHs may be distinguished by frequency domain within the same time domain. Furthermore, the terminal may receive information about the number of PDRCHs from the reader.

[0142] Meanwhile, the offset information may further include frequency shift direction information, and based on the frequency shift direction information, the plurality of PDRCHs may be set in at least one of a higher frequency direction and a lower frequency direction with respect to the first resource.

[0143] On the other hand, the plurality of PDRCHs may be set symmetrically for the first resource based on the offset information.

[0144] The terminal can receive information from the leader to enable or activate the above frequency shift.

[0145] Fig. 12 is a flowchart illustrating an operation method of a reader according to one embodiment of the present specification.

[0146] Referring to FIG. 12, the reader transmits to the terminal information regarding a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource (S1201). Thereafter, the reader receives data from the terminal through a second resource based on a frequency shift performed using the transmitted offset information (S1202).

[0147] The second resource may be a specific Physical Device to Reader Channel (PDRCH). Here, the specific PDRCH may be one of multiple PDRCHs. The multiple PDRCHs may be distinguished by frequency domain within the same time domain. Furthermore, the reader may transmit information about the number of PDRCHs to the terminal.

[0148] Meanwhile, the offset information may further include frequency shift direction information, and based on the frequency shift direction information, the plurality of PDRCHs may be set in at least one of a higher frequency direction and a lower frequency direction with respect to the first resource.

[0149] On the other hand, the plurality of PDRCHs may be set symmetrically for the first resource based on the offset information.

[0150] The leader can transmit information to the terminal to enable or activate the above frequency shift.

[0151] The disclosures of this specification, as described so far, can be implemented through various means. For example, the disclosures of this specification can be implemented through hardware, firmware, software, or a combination thereof. Specifically, the disclosures will be described below with reference to the drawings.

[0152] Figure 13 illustrates a device according to one embodiment of the present specification.

[0153] Referring to FIG. 13, the wireless communication system may include a first device (100a) and a second device (100b).

[0154] The first device (100a) may be a base station, a network node, a transmitting terminal, a receiving terminal, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with an autonomous driving function, a connected car, a drone (Unmanned Aerial Vehicle, UAV), an AI (Artificial Intelligence) module, a robot, an AR (Augmented Reality) device, a VR (Virtual Reality) device, an MR (Mixed Reality) device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, a device related to 5G services, or any other device related to the 4th industrial revolution field.

[0155] The second device (100b) may be a base station, a network node, a transmitting terminal, a receiving terminal, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with an autonomous driving function, a connected car, a drone (Unmanned Aerial Vehicle, UAV), an AI (Artificial Intelligence) module, a robot, an AR (Augmented Reality) device, a VR (Virtual Reality) device, an MR (Mixed Reality) device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, a device related to 5G services, or any other device related to the 4th industrial revolution field.

[0156] The first device (100a) may include at least one processor, such as a processor (1020a), at least one memory, such as a memory (1010a), and at least one transceiver, such as a transceiver (1031a). The processor (1020a) may perform the functions, procedures, and / or methods described above. The processor (1020a) may perform one or more protocols. For example, the processor (1020a) may perform one or more layers of a wireless interface protocol. The memory (1010a) may be connected to the processor (1020a) and may store various types of information and / or commands. The transceiver (1031a) may be connected to the processor (1020a) and may be controlled to transmit and receive wireless signals.

[0157] The second device (100b) may include at least one processor, such as a processor (1020b), at least one memory device, such as a memory (1010b), and at least one transceiver, such as a transceiver (1031b). The processor (1020b) may perform the functions, procedures, and / or methods described above. The processor (1020b) may implement one or more protocols. For example, the processor (1020b) may implement one or more layers of a wireless interface protocol. The memory (1010b) may be connected to the processor (1020b) and may store various types of information and / or commands. The transceiver (1031b) may be connected to the processor (1020b) and may be controlled to transmit and receive wireless signals.

[0158] The memory (1010a) and / or the memory (1010b) may be connected internally or externally to the processor (1020a) and / or the processor (1020b), or may be connected to another processor via various technologies such as a wired or wireless connection.

[0159] The first device (100a) and / or the second device (100b) may have one or more antennas. For example, the antenna (1036a) and / or the antenna (1036b) may be configured to transmit and receive wireless signals.

[0160] Fig. 14 is a block diagram showing the configuration of a terminal according to one embodiment of the present specification.

[0161] In particular, FIG. 14 is a drawing illustrating the device of FIG. 13 in more detail.

[0162] The device includes a memory (1010), a processor (1020), a transceiver (1031), a power management module (1091), a battery (1092), a display (1041), an input unit (1053), a speaker (1042), and a microphone (1052), a subscriber identification module (SIM) card, and one or more antennas.

[0163] The processor (1020) may be configured to implement the proposed functions, procedures, and / or methods described herein. Layers of a radio interface protocol may be implemented in the processor (1020). The processor (1020) may include an application-specific integrated circuit (ASIC), other chipsets, logic circuits, and / or data processing devices. The processor (1020) may be an application processor (AP). The processor (1020) may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modem (modulator and demodulator). Examples of the processor (1020) may be a SNAPDRAGON™ series processor manufactured by Qualcomm®, an EXYNOSTM series processor manufactured by Samsung®, an A series processor manufactured by Apple®, a HELIO™ series processor manufactured by MediaTek®, an ATOM™ series processor manufactured by INTEL®, a KIRINTM series processor manufactured by HiSilicon®, or a corresponding next-generation processor.

[0164] The power management module (1091) manages power to the processor (1020) and / or the transceiver (1031). The battery (1092) supplies power to the power management module (1091). The display (1041) outputs the results processed by the processor (1020). The input unit (1053) receives input to be used by the processor (1020). The input unit (1053) can be displayed on the display (1041). A SIM card is an integrated circuit used to securely store an international mobile subscriber identity (IMSI) and its associated keys, which are used to identify and authenticate subscribers in mobile devices such as mobile phones and computers. Contact information can also be stored on many SIM cards.

[0165] The memory (1010) is operably coupled to the processor (1020) and stores various information for operating the processor (610). The memory (1010) may include a read-only memory (ROM), a random access memory (RAM), flash memory, a memory card, a storage medium, and / or other storage devices. When the embodiment is implemented in software, the techniques described herein may be implemented as modules (e.g., procedures, functions, etc.) that perform the functions described herein. The modules may be stored in the memory (1010) and executed by the processor (1020). The memory (1010) may be implemented within the processor (1020). Alternatively, the memory (1010) may be implemented external to the processor (1020) and communicatively connected to the processor (1020) via various means known in the art.

[0166] The transceiver (1031) is operably coupled to the processor (1020) and transmits and / or receives a radio signal. The transceiver (1031) includes a transmitter and a receiver. The transceiver (1031) may include baseband circuitry for processing a radio frequency signal. The transceiver controls one or more antennas to transmit and / or receive a radio signal. The processor (1020) transmits command information to the transceiver (1031) to initiate communication, for example, to transmit a radio signal constituting voice communication data. The antenna functions to transmit and receive radio signals. Upon receiving a radio signal, the transceiver (1031) may transmit the signal to the processor (1020) for processing and convert the signal to baseband. The processed signal may be converted into audible or readable information output through the speaker (1042).

[0167] The speaker (1042) outputs sound-related results processed by the processor (1020). The microphone (1052) receives sound-related input to be used by the processor (1020).

[0168] A user inputs command information, such as a phone number, for example, by pressing (or touching) a button on an input unit (1053) or by voice activation using a microphone (1052). The processor (1020) receives this command information and processes it to perform an appropriate function, such as dialing a phone number. Operational data can be extracted from a SIM card or memory (1010). In addition, the processor (1020) can display command information or operation information on a display (1041) for the user's recognition and convenience.

[0169] Figure 15 shows a block diagram of a processor in which the disclosure of this specification is implemented.

[0170] As can be seen from FIG. 15, the processor (1020) implementing the disclosure of the present specification may include multiple circuits to implement the proposed functions, procedures, and / or methods described herein. For example, the processor (1020) may include a first circuit (1020-1), a second circuit (1020-2), and a third circuit (1020-3). Furthermore, although not shown, the processor (1020) may include more circuits. Each circuit may include multiple transistors.

[0171] The above processor (1020) may be called an application-specific integrated circuit (ASIC) or an application processor (AP), and may include at least one of a digital signal processor (DSP), a central processing unit (CPU), and a graphics processing unit (GPU).

[0172] FIG. 16 is a block diagram showing in detail the transmitter / receiver of the first device illustrated in FIG. 13 or the transmitter / receiver unit of the device illustrated in FIG. 14.

[0173] Referring to FIG. 16, the transceiver unit (1031) includes a transmitter (1031-1) and a receiver (1031-2). The transmitter (1031-1) includes a DFT (Discrete Fourier Transform) unit (1031-11), a subcarrier mapper (1031-12), an IFFT unit (1031-13), a CP insertion unit (1031-14), and a wireless transmitter unit (1031-15). The transmitter (1031-1) may further include a modulator. In addition, for example, the transmitter may further include a scramble unit (not shown), a modulation mapper (not shown), a layer mapper (not shown), and a layer permutator (not shown), which may be arranged before the DFT unit (1031-11). That is, in order to prevent an increase in PAPR (peak-to-average power ratio), the transmitter (1031-1) first passes the information through a DFT (1031-11) before mapping the signal to a subcarrier. The signal spread (or precoded in the same sense) by the DFT unit (1031-11) is mapped to a subcarrier through a subcarrier mapper (1031-12) and then passes through an IFFT (Inverse Fast Fourier Transform) unit (1031-13) to be converted into a signal on the time axis.

[0174] The DFT unit (1031-11) performs DFT on the input symbols and outputs complex-valued symbols. For example, if Ntx symbols are input (where Ntx is a natural number), the DFT size is Ntx. The DFT unit (1031-11) may be called a transform precoder. The subcarrier mapper (1031-12) maps the complex symbols to each subcarrier in the frequency domain. The complex symbols may be mapped to resource elements corresponding to resource blocks allocated for data transmission. The subcarrier mapper (1031-12) may be called a resource element mapper. The IFFT unit (1031-13) performs IFFT on the input symbols and outputs a baseband signal for data, which is a time-domain signal. The CP insertion unit (1031-14) copies a portion of the rear portion of the baseband signal for data and inserts it into the front portion of the baseband signal for data. CP insertion prevents ISI (Inter-Symbol Interference) and ICI (Inter-Carrier Interference), thereby maintaining orthogonality even in multipath channels.

[0175] On the other hand, the receiver (1031-2) includes a wireless reception unit (1031-21), a CP removal unit (1031-22), an FFT unit (1031-23), and an equalization unit (1031-24). The wireless reception unit (1031-21), the CP removal unit (1031-22), and the FFT unit (1031-23) of the receiver (1031-2) perform the inverse functions of the wireless transmission unit (1031-15), the CP insertion unit (1031-14), and the IFF unit (1031-13) of the transmitter (1031-1). The receiver (1031-2) may further include a demodulator.

[0176] Although the preferred embodiments have been described above by way of example, the disclosure of this specification is not limited to such specific embodiments, and may be modified, changed, or improved in various forms within the scope described in the spirit and claims of this specification.

[0177] In the exemplary system described above, the methods are described based on a flowchart as a series of steps or blocks. However, the order of the steps described is not limited, and some steps may occur in a different order or simultaneously with other steps described above. Furthermore, those skilled in the art will understand that the steps depicted in the flowchart are not exclusive, and other steps may be included, or one or more steps in the flowchart may be deleted without affecting the scope of the invention.

[0178] The claims set forth in this specification may be combined in various ways. For example, the technical features of the method claims of this specification may be combined and implemented as a device, and the technical features of the device claims of this specification may be combined and implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a device, and the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a method.

Claims

1. In a method of operating a terminal in a wireless communication system, A step of receiving information about a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource; A step of performing a frequency shift using the received offset information; and A method comprising the step of transmitting data through a second resource based on the frequency shift performed above.

2. In paragraph 1, A method wherein the second resource is a specific PDRCH (Physical Device to Reader Channel).

3. In paragraph 2, A method wherein the above specific PDRCH is one of a plurality of PDRCHs.

4. In paragraph 3, A method in which the above multiple PDRCHs are distinguished according to a frequency domain in the same time domain.

5. In paragraph 4, A method further comprising the step of receiving number information for the plurality of PDRCHs.

6. In paragraph 4, The above offset information further includes frequency shift direction information, A method in which the plurality of PDRCHs are set to at least one of a higher frequency direction and a lower frequency direction based on the first resource, based on the frequency shift direction information.

7. In paragraph 4, A method in which the plurality of PDRCHs are symmetrically set for the first resource based on the offset information.

8. In paragraph 1 A method further comprising the step of receiving information enabling or activating the frequency shift.

9. In a method of operating a reader in a wireless communication system, A step of transmitting information about a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource; and A method comprising the step of receiving data through a second resource based on a frequency shift performed using the above-mentioned transmitted offset information.

10. In paragraph 9, A method wherein the second resource is a specific PDRCH (Physical Device to Reader Channel).

11. In paragraph 10, A method wherein the above specific PDRCH is one of a plurality of PDRCHs.

12. In paragraph 11, A method in which the above multiple PDRCHs are distinguished according to a frequency domain in the same time domain.

13. In paragraph 12, A method further comprising the step of transmitting number information for the plurality of PDRCHs.

14. In paragraph 12, The above offset information further includes frequency shift direction information, A method in which the plurality of PDRCHs are set to at least one of a higher frequency direction and a lower frequency direction based on the first resource, based on the frequency shift direction information.

15. In paragraph 12, A method in which the plurality of PDRCHs are symmetrically set for the first resource based on the offset information.

16. In paragraph 9 A method further comprising the step of transmitting information enabling or activating the frequency shift.

17. As a terminal in a wireless communication system, at least one processor; and At least one memory storing instructions and being operably electrically connectable to the at least one processor, wherein the operations performed based on the instructions being executed by the at least one processor are: A step of receiving information about a first resource through which a carrier wave providing power is transmitted and offset information based on the first resource; A step of performing a frequency shift using the received offset information, and A terminal comprising a step of transmitting data through a second resource based on the frequency shift performed above.

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