Method and apparatus for operating internet of things device in communication system

Abstract

The present invention relates to a technology for operating an Internet of Things device in a communication system. The present disclosure may provide a method for a first communication node, the method comprising the steps of: generating configuration information of a carrier wave (CW) signal; transmitting the configuration information to a second communication node; generating transmission indication information of the CW signal on the basis of the configuration information; and transmitting the transmission indication information to the second communication node.

Description

Method and device for operating an Internet of Things device in a communication system

[0001] The present disclosure relates to an operating technology for an Internet of Things device in a communication system, and more particularly, to an operating technology for an Internet of Things device in a communication system that enables the Internet of Things device to transmit data by backscattering a signal received from a wireless device.

[0002] Advances in information and communication technology (ICT) can lead to the development of various wireless communication technologies. Representative wireless communication technologies include LTE (long term evolution), NR (new radio), and 6G (6th Generation), all of which are defined by the 3rd Generation Partnership Project (3GPP) standards. LTE can be one of the 4th Generation (4G) wireless communication technologies, and NR can be one of the 5th Generation (5G) wireless communication technologies.

[0003] In order to process the rapidly increasing amount of wireless data following the commercialization of 4G communication systems (e.g., communication systems supporting LTE), 5G communication systems (e.g., communication systems supporting NR) that use a higher frequency band (e.g., a frequency band higher than 6 GHz) than the frequency band of the 4G communication system (e.g., a frequency band below 6 GHz) may be considered. 5G communication systems may support enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and massive Machine Type Communication (mMTC).

[0004] In this area of ​​information and communication technology, the Internet of Things (IoT) has recently attracted significant attention for its potential to improve industrial production efficiency and enhance the comfort of everyday life. IoT devices can operate without batteries. These devices can harvest the necessary energy from wireless signals received from nearby wireless devices and transmit signals by backscattered. To achieve this, operational methods for IoT devices and the wireless devices that supply wireless signals to them may be required.

[0005] The purpose of the present disclosure to solve the above problems is to provide a method and device for operating an Internet of Things device in a communication system that enables the Internet of Things device to transmit data by backscatter-ing a signal received from a wireless device.

[0006] In order to achieve the above object, a method for operating an Internet of Things device in a communication system according to a first embodiment of the present disclosure may include, as a method of a first communication node, the steps of: receiving configuration information of a CW (carrier wave) signal from a second communication node; receiving transmission instruction information of the CW signal from the second communication node; and transmitting the CW signal to a third communication node based on the configuration information and the transmission instruction information.

[0007] Here, the setting information is included in an upper layer message, the upper layer message is received from the second communication node, the transmission instruction information is included in downlink control information, and the downlink control information can be received from the second communication node.

[0008] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and the frequency resource setting information may include at least one of information on at least one PRB (physical resource block) index, information on at least one subcarrier index, or information on at least one frequency.

[0009] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and the frequency resource setting information may include at least one of information about at least one PRB index indicated by at least one order value, information about at least one subcarrier index indicated by at least one order value, or information about at least one frequency indicated by at least one order value.

[0010] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and when the frequency resource setting information includes at least one order value and at least one of information about at least one PRB index indicated by the at least one order value, information about at least one subcarrier index indicated by the at least one order value, or information about at least one frequency indicated by the at least one order value, the transmission instruction information may include the at least one order value.

[0011] Meanwhile, a method for operating an Internet of Things device in a communication system according to a second embodiment of the present disclosure for achieving the above purpose may include, as a method of a second communication node, a step of generating configuration information of a CW (carrier wave) signal; a step of transmitting the configuration information to a first communication node; a step of generating transmission instruction information of the CW signal based on the configuration information; and a step of transmitting the transmission instruction information to the first communication node.

[0012] Here, the step of transmitting the above setting information to a third communication node; and the step of transmitting the first data to the third communication node in consideration of the above setting information may be further included.

[0013] Here, the step of receiving a backscattered signal of the CW signal including second data from a third communication node may be further included.

[0014] Here, before receiving the backscatter signal, a step of transmitting backscatter indication information to the third communication node may be further included.

[0015] Here, the setting information is included in an upper layer message, the upper layer message is transmitted to the first communication node, the transmission instruction information is included in downlink control information, and the downlink control information can be transmitted to the first communication node.

[0016] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and the frequency resource setting information may include at least one of information on at least one PRB (physical resource block) index, information on at least one subcarrier index, or information on at least one frequency.

[0017] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and when the frequency resource setting information includes at least one order value and at least one of information about at least one PRB index indicated by the at least one order value, information about at least one subcarrier index, or information about at least one frequency, the transmission instruction information may include the at least one order value.

[0018] Meanwhile, in a communication system according to a third embodiment of the present disclosure for achieving the above purpose, an operating device of an Internet of Things device may include, as a first communication node, at least one processor, wherein the at least one processor may cause the first communication node to receive configuration information of a CW (carrier wave) signal from a second communication node; receive transmission instruction information of the CW signal from the second communication node; and transmit the CW signal to a third communication node based on the configuration information and the transmission instruction information.

[0019] Here, the setting information is included in an upper layer message, the at least one processor is configured to cause the first communication node to receive the upper layer message from the second communication node, the transmission instruction information is included in downlink control information, and the at least one processor is configured to cause the first communication node to receive the downlink control information from the second communication node.

[0020] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and the frequency resource setting information may include at least one of information on at least one PRB (physical resource block) index, information on at least one subcarrier index, or information on at least one frequency.

[0021] Here, the setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, and when the frequency resource setting information includes at least one order value and at least one of information about at least one PRB index indicated by the at least one order value, information about at least one subcarrier index, or information about at least one frequency, the transmission instruction information may include the at least one order value.

[0022] According to the present disclosure, a base station can transmit configuration information including frequency resource configuration information, time resource configuration information, transmission power configuration information, etc. to a CW (carrier wave) terminal. In addition, the base station can transmit transmission instruction information including transmission frequency information, transmission time information, etc. to the CW terminal. The CW terminal can receive configuration information, transmission instruction information, etc. from the base station. The CW terminal can transmit a CW signal to an Internet of Things device according to the configuration information, transmission instruction information, etc. The Internet of Things device can receive the CW signal, collect energy from the received signal, and transmit a backscattered signal including data to the base station by backscatter the received signal. The base station can obtain data by receiving the backscattered signal including data from the Internet of Things device.

[0023] Figure 1 is a conceptual diagram illustrating a first embodiment of a communication system.

[0024] Figure 2 is a block diagram illustrating a first embodiment of a communication node constituting a communication system.

[0025] Figure 3 is a conceptual diagram illustrating embodiments of a communication system including an Internet of Things device.

[0026] Figures 4a and 4b are conceptual diagrams showing examples of resource configuration of a communication system including an Internet of Things device.

[0027] Figure 5 is a conceptual diagram illustrating embodiments of a method for operating an Internet of Things device in a communication system.

[0028] Figure 6 is a flowchart illustrating embodiments of a method for operating an Internet of Things device in a communication system.

[0029] This disclosure may be subject to various modifications and various embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the disclosure.

[0030] While terms such as "first" and "second" may be used to describe various components, 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 disclosure, 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." The term "and / or" includes a combination of multiple related items described herein or any of multiple related items described herein.

[0031] In embodiments of the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.” Furthermore, in embodiments of the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.”

[0032] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may 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.

[0033] The terminology used in this disclosure is only used to describe specific embodiments and is not intended to limit the present disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this disclosure, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0034] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0035] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding in describing the present disclosure, identical reference numerals will be used for identical components in the drawings, and redundant descriptions of identical components will be omitted.

[0036] Figure 1 is a conceptual diagram illustrating a first embodiment of a communication system.

[0037] Referring to FIG. 1, a communication system (100) may include a plurality of communication nodes (110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6). Here, the communication system may be referred to as a "communication network." Each of the plurality of communication nodes may support at least one communication protocol. For example, each of the plurality of communication nodes may support a communication protocol based on CDMA (code division multiple access), a communication protocol based on WCDMA (wideband CDMA), a communication protocol based on TDMA (time division multiple access), a communication protocol based on FDMA (frequency division multiple access), a communication protocol based on OFDM (orthogonal frequency division multiplexing), a communication protocol based on OFDMA (orthogonal frequency division multiple access), a communication protocol based on SC (single carrier)-FDMA, a communication protocol based on NOMA (non-orthogonal multiple access), a communication protocol based on SDMA (space division multiple access), etc. Each of the plurality of communication nodes may have the following structure.

[0038] Figure 2 is a block diagram illustrating a first embodiment of a communication node constituting a communication system.

[0039] Referring to FIG. 2, a communication node (200) may include at least one processor (210), a memory (220), and a transceiver (230) that is connected to a network and performs communication. In addition, the communication node (200) may further include an input interface device (240), an output interface device (250), a storage device (260), etc. Each component included in the communication node (200) may be connected by a bus (270) to perform communication with each other. However, each component included in the communication node (200) may be connected through an individual interface or an individual bus centered around the processor (210), rather than a common bus (270). For example, the processor (210) may be connected to at least one of the memory (220), the transceiver (230), the input interface device (240), the output interface device (250), and the storage device (260) through a dedicated interface.

[0040] The processor (210) can execute program commands stored in at least one of the memory (220) and the storage device (260). The processor (210) may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which the methods according to embodiments of the present disclosure are performed. Each of the memory (220) and the storage device (260) may be configured with at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory (220) may be configured with at least one of a read-only memory (ROM) and a random access memory (RAM).

[0041] Referring again to FIG. 1, the communication system (100) may include a plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) and a plurality of user equipment (UEs) (130-1, 130-2, 130-3, 130-4, 130-5, 130-6). Each of the first base station (110-1), the second base station (110-2), and the third base station (110-3) may form a macro cell. Each of the fourth base station (120-1) and the fifth base station (120-2) may form a small cell. The fourth base station (120-1), the third UE (130-3), and the fourth UE (130-4) may be within the coverage of the first base station (110-1). The second UE (130-2), the fourth UE (130-4), and the fifth UE (130-5) may be within the coverage of the second base station (110-2). The fifth base station (120-2), the fourth UE (130-4), the fifth UE (130-5), and the sixth UE (130-6) may be within the coverage of the third base station (110-3). The first UE (130-1) may be within the coverage of the fourth base station (120-1). The sixth UE (130-6) may be within the coverage of the fifth base station (120-2).

[0042] Here, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be referred to as a NodeB, an evolved NodeB, a base transceiver station (BTS), a radio base station, a radio transceiver, an access point, an access node, a road side unit (RSU), a digital unit (DU), a cloud digital unit (CDU), a radio remote head (RRH), a radio unit (RU), a transmission point (TP), a transmission and reception point (TRP), a relay node, etc. Each of the plurality of UEs (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) may be referred to as a terminal, an access terminal, a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, a node, a device, etc.

[0043] Each of the plurality of communication nodes (110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6) can support cellular communication (e.g., long term evolution (LTE), LTE-A (advanced) as defined in the 3rd generation partnership project (3GPP) standard). Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can operate in a different frequency band or can operate in the same frequency band. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can be connected to each other via an ideal backhaul or a non-ideal backhaul, and can exchange information with each other via the ideal backhaul or the non-ideal backhaul. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can be connected to a core network (not shown) via an ideal backhaul or a non-ideal backhaul. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can transmit a signal received from the core network to the corresponding UE (130-1, 130-2, 130-3, 130-4, 130-5, 130-6), and can transmit a signal received from the corresponding UE (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) to the core network.

[0044] Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can support OFDMA-based downlink transmission and SC-FDMA-based uplink transmission. In addition, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can support MIMO (multiple input multiple output) transmission (e.g., single user (SU)-MIMO, multi user (MU)-MIMO, massive MIMO, etc.), CoMP (coordinated multipoint) transmission, carrier aggregation transmission, transmission in an unlicensed band, device to device (D2D) communication (or, ProSe (proximity services), etc.). Here, each of the plurality of UEs (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) can support the base station (110-1, 110-2, 110-3, 120-1, 120-2) and can perform operations supported by base stations (110-1, 110-2, 110-3, 120-1, 120-2).

[0045] Meanwhile, 5G communication systems can support data transmission functions tailored to service characteristics. 5G communication systems and data transmission technologies may vary depending on service requirements to support data transmission functions tailored to the specific service. 5G communication systems can apply the technologies required by the service under consideration while maintaining the basic operating procedures and signal structures as much as possible.

[0046] The services contemplated by this disclosure may be Internet of Things (IoT) services, such as logistics verification, process processing, industrial equipment operation monitoring, and equipment control in industries or factories. Furthermore, the services contemplated by this disclosure may be IoT services applicable across society, such as micromobility and power metering.

[0047] IoT devices for these IoT services can be deployed in large numbers—hundreds of billions—to accommodate diverse applications while further reducing size, complexity, and power consumption. However, IoT devices can be difficult to manually replace or recharge due to maintenance and management issues. Therefore, IoT technology may require new ambient IoT (AIoT) technologies to support devices without energy storage capabilities, batteries, the need for manual battery replacement, or the need for recharging.

[0048] In these AIoT networks, IoT devices may be wireless devices with lower complexity than narrowband (NB)-IoT devices or long-term evolution machine type communication (LTE-MTC) devices. Furthermore, IoT devices in AIoT networks may be wireless devices without batteries. Alternatively, IoT devices in AIoT networks may be wireless devices with limited battery capacity.

[0049] As such, the wireless device contemplated by this disclosure can operate without a battery. The wireless device contemplated by this disclosure can operate without being connected to an external power source. The wireless device contemplated by this disclosure can secure the energy necessary for operation by obtaining, collecting, aggregating, and harvesting energy sources from the surrounding environment.

[0050] For example, the wireless device considered in this disclosure can obtain the energy necessary for its operation from a wireless signal transmitted from another wireless device in the vicinity. The wireless device considered in this disclosure can backscatter a wireless signal received from another wireless device in the vicinity and transmit the backscattered wireless signal. The wireless device considered in this disclosure can be defined as an ambient IoT device or terminal as a device that harvests energy from the surrounding environment. For the convenience of technology, an ambient IoT terminal can be defined as an IoT device or terminal.

[0051] To this end, the present disclosure may propose an operating method and a transmission method of a signal supply terminal that supplies a wireless signal for backscattering. Furthermore, the present disclosure may propose a method for managing or controlling the signal supply terminal. Furthermore, the present disclosure may propose a method for transmitting necessary information to the signal supply terminal. Furthermore, the present disclosure may provide a method for transmitting and receiving data to a wireless communication network in an IoT device that operates by harvesting energy without an external power supply.

[0052] Figure 3 is a conceptual diagram illustrating embodiments of a communication system including an Internet of Things device.

[0053] Referring to FIG. 3, a communication node (310) may be a device that wirelessly transmits and receives data with an IoT device. The communication node (310) may be defined as a 'reader', an 'R-node', or an 'R-node'. The communication node (320) may operate at low power as an AIoT device. The communication node (320) may communicate with a 'reader'. The communication node (320) may be defined as an 'IoT device', an 'IoT terminal', an 'IoT node', an 'I-node', or an 'I-node'. A link from a communication node (310) to a communication node (320) may be referred to as an RI link. Conversely, a link from a communication node (320) to a communication node (310) may be referred to as an IR link.

[0054] The communication node (330) can emit or transmit a carrier wave (CW). The communication node (330) can be defined as a 'CW node', a 'CW node', a 'CW device', or a 'CW terminal'. In addition, the communication node (330) can be defined as a carrier wave supply terminal, a carrier wave terminal, or a carrier wave node. The communication node (330) can transmit the carrier wave to an IoT node. Then, the IoT node can collect, aggregate, or accumulate energy from the carrier wave. In addition, the IoT node can backscatter the carrier wave and transmit or provide a signal to the communication node (310). The communication node (310) can receive the signal transmitted through backscatter from the IoT node.

[0055] A leader, which is a communication node (310), may be a base station or a terminal in a wireless communication network. Here, a terminal may be connected to a base station and transmit and receive data, and may refer to a user equipment (UE). A CW node, which is a communication node (330), may be a base station or a terminal in a wireless communication network.

[0056] The I-node (321) may be located at a distance capable of transmitting and receiving with the base station (340). In such an operating environment, the base station (340) may operate as an R-node or CW node with respect to the I-node (321). Alternatively, the terminal (350) may perform the role of an R-node or CW node with respect to the I-node (321). Alternatively, another adjacent base station may perform the function of an R-node or CW node with respect to the I-node (321). The network environment for the operating conditions of the wireless devices may be defined in the present disclosure as "service conditions" or "operating environment-1."

[0057] The I-node (322) may be located at a distance from the base station (340) that makes transmission or reception impossible. The I-node (322) may operate at low power. In this case, the I-node (322) may receive data from the base station (340). The I-node (322) may transmit a signal having a signal strength below a certain level. In this case, the base station (322) may have difficulty receiving data from the I-node (322) without error.

[0058] Under these conditions, the terminal (350) can perform the role of an R node that can transmit and receive data with the I node (322). In this case, the I node (322) can receive data from the base station (340). And, the I node (322) can transmit data to the terminal (350). The terminal (350) can receive data from the I node (322) and transmit it to the base station (340). At this time, the terminal (351) that acts as the R node and another terminal (350) can perform the role of the CW node. Alternatively, the base station (340) can perform the role of the CW node. Alternatively, the base station (341) can perform the role of the CW node.

[0059] Alternatively, another adjacent base station (341) may serve as an R node capable of transmitting and receiving data with the I node (322). In this case, the I node (322) may receive data from the base station (340). In addition, the I node (322) may transmit data to another adjacent base station (341). Another adjacent base station (341) may receive data from the I node (322) and transmit the received data to the base station (340). The base station (340) may receive data from another adjacent base station (341). The terminal (350) may serve as a CW node. The above network environment may be defined in the present disclosure as an "out-of-service condition" or "operating environment-2."

[0060] Next, methods for configuring transmission and reception channels, frequencies, or links of communication nodes in a wireless communication network can be described. The wireless communication network can be composed of 'R nodes,' 'I nodes,' or 'CW nodes.' Here, the 'R nodes' and 'CW nodes' can be implemented as at least physically identical communication nodes. The 'R nodes' and 'CW nodes' can be implemented as base stations or terminals. The signal link transmitted from the base station to the terminal can be referred to as a downlink, and the signal link transmitted from the terminal to the base station can be referred to as an uplink.

[0061] In the present disclosure, a link through which an 'R node' transmits a signal to an 'I node' may be defined as an 'RI link'. A link through which an 'I node' transmits a signal to an 'R node' may be defined as an 'IR link'. A link through which a 'CW node' transmits a signal to an 'I node' may be defined as a 'CWI link'.

[0062] In the present disclosure, an RI / IR / CWI link may be described as an RI / IR / CWI link transmission or an RI / IR / CWI transmission. However, as a detailed difference, a link may refer to a connection between two nodes. A "transmission" may refer to the occupancy of radio resources and the actual transmission of a signal. For example, an "RI transmission" may refer to a signal or a set of signals transmitted via an RI link during a certain time interval (e.g., multiple slots).

[0063] In addition, in the present disclosure, the transmission resource of the 'RI / IR / CWI link' may refer to a resource area where transmission is possible. 'RI / IR / CWI transmission' may refer to the transmission itself where actual transmission is performed through the resource area. Hereinafter, for the convenience of description, the present disclosure may assume that 'RI / IR / CWI transmission' is performed entirely on the entire RI / IR / CWI transmission resource. In other words, the description may assume that the size or area of ​​the resource area and the transmission itself are identical.

[0064] If the 'R node' is a base station, the 'RI link' can be transmitted in the downlink of the 'R node'. If the 'R node' that transmitted the signal also acts as an 'R node' that receives a signal from an 'I node', the 'IR link' can be configured in the same way in the downlink of the R node. In a base station environment that operates in FDD (frequency division duplex), it may be difficult for any I node to perform frequency conversion or frequency shift. Therefore, the RI link and the IR link can be configured in the same downlink. Here, the 'CWI link' can also be configured in the same downlink.

[0065] Figures 4a and 4b are conceptual diagrams showing examples of resource configuration of a communication system including an Internet of Things device.

[0066] Referring to FIG. 4A, in a communication system, a leader can set radio link resource regions (410, 420, 421, 430) in a time / frequency resource region. The radio link resource region (410) may refer to a resource region for transmission of an 'RI link'. The radio link resource region (410) may refer to an RI link resource region. The radio link resource region (410) may refer to an RI link transmission resource region. The radio link resource region (410) may refer to a 'radio link resource (410)'. The radio link resource (410) may refer to an 'RI link resource'. The radio link resource (410) may refer to 'RI transmission' itself. In other words, the RI link transmission resource may be a resource region capable of transmitting data via an RI link.

[0067] "RI transmission" may refer to the transmission itself in which actual transmission is performed through the resource area of ​​the wireless link resource (410). However, for the sake of convenience of description, it may be assumed that "RI transmission" is performed across the entire transmission resource. In other words, it may be assumed that the resource area and the size or area of ​​the transmission itself are identical. An R node may transmit data to an I node using the wireless link resource (410). The I nodes may receive data from an R node through the wireless link resource (410).

[0068] The wireless link resource area (420, 421) may refer to a resource area for transmission of an 'IR link'. The wireless link resource area (420, 421) may refer to an IR link resource area. The wireless link resource area (420, 421) may refer to an IR link transmission resource area. The wireless link resource area (420, 421) may refer to 'wireless link resources (420, 421)'. The wireless link resources (420, 421) may refer to 'IR link resources'. The wireless link resources (420, 421) may refer to 'IR transmission' itself. In other words, the IR link transmission resource may be a resource area capable of transmitting data via an IR link.

[0069] "IR transmission" may refer to the actual transmission itself, which occurs through the resource area of ​​wireless link resources (420, 421). However, for convenience of description, it may be assumed that "IR transmission" is performed across the entire transmission resource. In other words, the size or area of ​​the resource area and the transmission itself may be assumed to be identical.

[0070] The wireless link resource (420) may refer to an 'IR link' transmission resource or transmission that uses the same resource block (RB) as the 'RI link'. The wireless link resource (421) may refer to an 'IR link' transmission resource or transmission that uses a different frequency-shifted resource block from the 'RI link'. Here, the I-node(s) configured to use the wireless link resource (420) and other I-node(s) may use the wireless link resource (421). The I-node may transmit data to R-nodes using the wireless link resource (420, 421). The R-nodes may receive data from the I-node through the wireless link resource (420, 421).

[0071] The wireless link resource region (430) may refer to a resource region for transmitting control information that provides information about transmission resources and / or information necessary for transmission. The wireless link resource region (430) may refer to a control information resource region. The wireless link resource region (430) may refer to a control information transmission resource region. The wireless link resource region (430) may refer to a 'wireless link resource (430)'. The wireless link resource (430) may refer to a 'control information resource'. The wireless link resource (430) may refer to 'control information transmission' itself. In other words, the control information transmission resource may be a resource region that can transmit control information via an RI link.

[0072] 'Control information transmission' may refer to the transmission itself in which actual transmission is performed through the resource area of ​​the wireless link resource (430). However, for the convenience of the technology, it may be assumed that 'control information transmission' is performed on all transmission resources. In other words, it may be assumed that the size or area of ​​the resource area and the transmission itself are the same. The wireless link resource (430) may be included in the 'RI link' resource (410). The information required for transmission may include information on parameters required for transmission. The R node may transmit control information to the I node using the wireless link resource (430). The I node may receive control information from the R node through the wireless link resource (430).

[0073] I-nodes can select parameters required for transmission from the received control information. I-nodes can identify the radio resources required for transmission from the control information and attempt transmission on the identified radio resources. For example, the control information may include information about resources to be used for IR link configuration. Furthermore, the control information may include information related to contention-based access schemes (e.g., slotted-ALOHA (additive links on-line Hawaii area)), OFDM symbol-based ALOHA, etc.).

[0074] In addition, the control information may include center frequency information of the 'IR link'. In addition, the control information may include RI link resource information. In other words, the control information may include end information of the RI link resource. The end information of the RI link resource may include information on the end time or end slot position of the RI link resource. Based on the end information of the RI link resource, the I-nodes can determine or estimate the start time or start slot position of the IR link resource.

[0075] The wireless signals (450, 451) may refer to CW signals transmitted from the CW node. The wireless signal (451) may refer to a CW signal of a frequency-shifted resource. The CW node may transmit the wireless signals (450, 451) to the I-node(s). The I-node may receive the wireless signal from the CW node and collect and store energy from the received wireless signal. The I-node may receive the wireless signal from the CW node and transmit data to the R-node via the 'IR link' by reflecting and backscattering the received wireless signal. The R-node may receive data transmitted from the I-node by backscattering.

[0076] A CW signal can be transmitted during a time period consisting of at least an RI link and an IR link. Multiple CW signals can be transmitted in a slot (slot), which is a time domain resource. Here, multiple can mean that multiple signals are transmitted simultaneously on different frequencies, tones, or subcarriers. The control information resource (430) can be composed of RB resources including at least a CW. Here, the RB resources can be composed of the entire RB allocated to the 'RI link'. The RB resources can be configured to be limited to some RBs including a CW.

[0077] Referring to FIG. 4B, in a communication system, a leader can set wireless link resource regions (410, 420, 421, 430) in a time / frequency resource region. The R node can transmit a preamble or synchronization signal (460) to the I node. The I node can receive the preamble or synchronization signal (460) from the R node. The preamble or synchronization signal (460) can enable the RI transmission to be confirmed in the front part of the RI transmission. In addition, the preamble or synchronization signal (460) can enable the RI transmission to be time-synchronized in the front part of the RI transmission. The R node can transmit the preamble or synchronization signal (460) to the I node before the RI transmission. The I node can receive the preamble or synchronization signal (460) and anticipate the RI transmission. The I node can receive a preamble or synchronization signal (460) and perform time synchronization for receiving RI transmissions.

[0078] The I-node can transmit a preamble or synchronization signal (470) to the R-node. The R-node can receive the preamble or synchronization signal (470) from the I-node. The preamble or synchronization signal (470) can allow the IR transmission to be confirmed in the front of the IR transmission. In addition, the preamble or synchronization signal (470) can allow the IR transmission to be time-synchronized in the front of the IR transmission. The I-node can transmit the preamble or synchronization signal (470) to the R-node before transmitting the IR. The R-node can receive the preamble or synchronization signal (470) and anticipate the IR transmission. The R-node can receive the preamble or synchronization signal (470) and perform time synchronization for receiving the IR transmission.

[0079] The signals (460, 470) may be composed of signals based on a known sequence. Alternatively, the signals (460, 470) may be composed of signals based on information that can distinguish R nodes. Alternatively, the signals (460, 470) may be composed of signals based on information that can distinguish I nodes. Alternatively, the signals (460, 470) may be signals composed based on any information or sequence composed by the R nodes. The control information (430) may not be distinguished as a separate resource area and may be included in the RI transmission resource or RI transmission.

[0080] Next, the present disclosure may describe embodiments of specific hardware configurations of an I-node. The I-node may have different configurations depending on operating conditions. The I-node considered in the present disclosure may not be directly powered from an external source. The I-node may secure a power source by collecting, accumulating, or integrating energy from an energy source. The I-node may transmit data via an 'IR link' by backscatter-ing a signal received from an external source, depending on the magnitude of power consumption. The I-node may transmit and receive data in the form of at least an amplitude shift keying (AMK) or on-off keying (OOK) signal. This type of IoT node may be defined as a 'Type A I-node.'

[0081] An I-node may use an active RF (radio frequency) component to extend the transmission range during data transmission using the backscattering method. Alternatively, an I-node may use an active RF component to change the operating frequency during data transmission using the backscattering method. This type of I-node may be defined as a "B-type I-node." Alternatively, an I-node may not use the backscattering method and may transmit data by generating a signal. This type of I-node may be defined as a "C-type I-node."

[0082] In terms of constructing a carrier wave signal or CW signal, the CW signal can be a sinusoidal wave generated with one frequency or one frequency tone. This type of carrier wave signal or CW signal can be defined as a "single-tone CW signal." A single-tone CW signal can be a CW signal whose tone type is a single tone. An OFDM system can generate a "single-tone CW signal" using a single subcarrier before performing an inverse fast Fourier transform (IFFT). The OFDM system can be CP-OFDM, which constructs a signal using a cyclic prefix (CP). In this case, the OFDM system can maintain phase continuity in the time domain by performing a phase rotation before the IFFT for each OFDM symbol. The OFDM system can generate a single-tone CW signal by performing a phase rotation or phase shift considering the OFDM symbol index and the CP length.

[0083] An OFDM system can generate a "single-tone CW signal" based on CP-OFDM using Equation 1 or Equation 2. An OFDM system can use Equation 1 or Equation 2 considering digital samples.

[0084]

[0085]

[0086] In Equations 1 and 2, C(n,l) may be a time domain symbol for the time domain sample index n and the OFDM symbol index of the lth FFT size. NFFT may be the size of the FFT. NCP may be the size of the guard interval. k may be a subcarrier index. The OFDM system may configure the lth OFDM symbol of the CW signal by adding a CP to the OFDM symbol of the lth FFT size. In Equations 1 and 2, the value of l may be defined based on the value of the 1st symbol being 0. The value of l may be defined as the symbol index value of the network. The value of l may be defined as the value of l for the index for the lth symbol. C k can be 0 or any value. Any value can be 1. C k can have any value in a single tone subcarrier and 0 in other subcarriers. n, l, NFFT, NCP, k and C k could be a mistake.

[0087] The CW node may receive some of the parameters of Equations 1 and 2 from the base station managing the network. In one embodiment, the CW node may receive subcarrier index information used for single tone generation from the base station. The CW node may receive information about the OFDM symbol index or l associated with the OFDM symbol interval for transmitting the CW signal from the base station.

[0088] In an embodiment, the CW signal may be a single-tone CW signal. The single-tone CW signal may be in the form of a sine wave having an arbitrary frequency value. The arbitrary frequency value may be a frequency indicated by a subcarrier index of the NR system. The single-tone CW signal may be a single file having an arbitrary frequency value transmitted on an arbitrary subcarrier index resource of the NR system. The single-tone CW signal may be a single file in which the carrier frequency is modulated by a sine wave having an arbitrary frequency value.

[0089] In an embodiment, a CW signal may be composed of two or more single tones. A CW signal composed of two or more single tones may be a "multi-tone CW signal." For example, the multi-tone may be assumed to be composed of two single tones. The multi-tone CW signal may be a CW signal whose tone type is multi-tone. The two single tones may be composed of the single tones described in the preceding embodiments spaced apart by a constant frequency interval (e.g., f_cw_gap). f_cw_gap may be a real number and may have units of Hz.

[0090] In an embodiment, a CW signal may be configured to transmit an 'IR transmission' in a frequency hopping manner. For example, the CW signal may be composed of two single tones. One or more I-nodes may transmit the 'IR transmission' in a frequency hopping manner. For example, a single tone signal may be configured and transmitted by a CW node according to a frequency hopping pattern. The CW node may transmit the single tones at different frequencies according to the frequency hopping pattern.

[0091] First embodiment of setting information of CW signal

[0092] The configuration information of the CW signal may include frequency resource configuration information for transmitting the CW signal, time resource configuration information for transmitting the CW signal, transmission power configuration information for transmitting the CW signal, etc. The base station may transmit the configuration information of the CW signal to the CW node through an RRC (radio resource control) message (or a higher layer message) and / or downlink control information (DCI). The CW node may receive the configuration information of the CW signal from the base station through an RRC message (or a higher layer message) and / or downlink control information. The base station may transmit the frequency resource configuration information of the CW signal to the CW node. The CW node may receive the frequency resource configuration information of the CW signal from the base station. The base station may transmit the time resource configuration information of the CW signal to the CW node. The CW node may receive the time resource configuration information of the CW signal from the base station. The base station may transmit the transmission power configuration information of the CW signal to the CW node. A CW node can receive transmission power setting information of a CW signal from a base station.

[0093] The base station can provide configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node can receive configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information from the base station through an RRC message (or a higher layer message) and / or downlink control information.

[0094] The frequency resource configuration information may be information on the index of a physical resource block (PRB) including a subcarrier that can be used to transmit a CW signal from a CW node. The frequency resource configuration information may be information on any subcarrier that can be used to transmit a CW signal from a CW node. The subcarrier information may be, for example, subcarrier index information. Alternatively, the frequency resource configuration information may be information on any frequency to be used for a CW signal. The frequency information may be, for example, a frequency value.

[0095] In this case, the CW node can receive frequency resource configuration information including a PRB index. The CW node can select at least one of the subcarrier indices included in the PRB indicated by the received PRB index, and transmit a CW signal to the I-node using a frequency according to at least one of the selected subcarrier indexes. When the CW node receives the frequency resource configuration information including the subcarrier index, the CW signal can be transmitted to the I-node using a frequency according to the received subcarrier index. When the CW node receives the frequency resource configuration information including a frequency value, the CW signal can be transmitted to the I-node using a frequency according to the received frequency value. In this way, the CW node can transmit a single-tone CW signal to the I-node.

[0096] The frequency resource configuration information may be information on indices of physical resource blocks (PRBs) including subcarrier(s) that can be used to transmit a CW signal in a CW node. The frequency resource configuration information may be information on any subcarrier that can be used to transmit a CW signal in a CW node. The subcarrier information may be, for example, information on subcarrier indices. Alternatively, the frequency resource configuration information may be information on any frequencies to be used for a CW signal. The frequency information may be, for example, frequency values.

[0097] In this case, the CW node can receive frequency resource configuration information including PRB indexes. The CW node can select at least one subcarrier index from each of the PRBs indicated by the received PRB indexes, and transmit a CW signal to the I-node using a frequency according to the at least one selected subcarrier index. Alternatively, the CW node can select at least one PRB from the PRBs indicated by the received PRB indexes. The CW node can select at least one subcarrier index from the at least one selected PRB, and transmit a CW signal to the I-node using a frequency according to the at least one selected subcarrier index.

[0098] A CW node can receive frequency resource configuration information including subcarrier indices. The CW node can transmit CW signals to the I-node using frequencies according to the received subcarrier indices. Alternatively, the CW node can select at least one of the received subcarrier indices and transmit at least one CW signal to the I-node using at least one frequency according to the at least one selected subcarrier index. The CW node can receive frequency resource configuration information including frequency values. The CW node can transmit CW signals to the I-node using frequencies according to the received frequency values. In this way, the CW node can transmit a multi-tone CW signal. Alternatively, the CW node can receive frequency resource configuration information including frequency values. The CW node can select at least one of the received frequency values ​​and transmit at least one CW signal to the I-node using the at least one selected frequency. In this way, the CW node can transmit a single-tone CW signal to the I-node.

[0099] A base station can transmit an RRC message including information on configurable frequency resources to a CW node. The CW node can receive an RRC message including information on configurable frequency resources from the base station. The configurable frequency resource information may be at least one of information on index(es) of PRB(s) including subcarrier(s) that can be used to transmit a CW signal in the CW node, information on index(es) of any one or more subcarriers that can be used to transmit a CW signal, or information on any one or more frequency values ​​that can be used to transmit a CW signal. The configurable frequency resource information may be frequency resource configuration information.

[0100] A base station can configure information about configurable frequency resources as a table having at least one order value (table index value) and information about at least one frequency resource indicated by each order value. Information about at least one frequency resource indicated by each order value can be at least one of information about index(es) of PRB(s) including subcarrier(s) that can be used to transmit a CW signal, information about at least one subcarrier index that can be used to transmit a CW signal, or information about at least one frequency value that can be used to transmit a CW signal.

[0101] In other words, the information about the frequency resources indicated by each order value may be at least one of information about the index of a PRB including a subcarrier that can be used to transmit a CW signal, information about the index of any one subcarrier that can be used to transmit a CW signal, or information about any one frequency value that can be used to transmit a CW signal. The information about the frequency resources indicated by each order value may be at least one of information about the indexes of PRBs including subcarriers that can be used to transmit a CW signal, information about the indexes of any one subcarrier that can be used to transmit a CW signal, or information about the frequency values ​​that can be used to transmit a CW signal.

[0102] Information about configurable frequency resources may be a frequency resource configuration information set or a frequency resource set. The base station may transmit information about a table consisting of a frequency resource configuration information set (or frequency resource set) to the CW node. The CW node may receive information about a table consisting of a frequency resource configuration information set from the base station.

[0103] A CW node may use the frequency resource with the lowest order value to transmit a CW signal, unless otherwise instructed. The table may contain information about one frequency resource. In this case, the CW node may generate a CW signal using one frequency resource included in the table and transmit the generated CW signal to the I-node. The CW signal may be a single tone. The table may contain information about two or more frequency resources. In this case, the CW node may generate CW signals using two or more frequency resources included in the table and transmit the generated CW signal to the I-node. The CW signals may be multi-tone.

[0104] The base station can transmit transmission frequency indication information (e.g., an order value) indicating a configurable frequency resource to be used for actual transmission among the configurable frequency resources in the table to the CW node through an RRC message or downlink control information. The CW node can receive transmission frequency indication information (e.g., an order value) indicating a frequency resource information to be used for actual transmission among the frequency resource configuration information in the table from the base station. The transmission frequency indication information may be transmission indication information. The information about the configurable frequency resources to be used for actual transmission may be frequency resource information used for actual transmission.

[0105] The CW node can transmit a CW signal to the I-node using frequency resources according to the received transmission frequency indication information. In this way, the CW node can generate a CW signal based on the received frequency resource setting information and transmission frequency indication information, and transmit the generated CW signal to the I-node.

[0106] The transmission frequency indication information may include one order value. One order value may indicate at least one of information on the index of a PRB including a subcarrier that can be used to transmit a CW signal, information on an arbitrary subcarrier index that can be used to transmit a CW signal, or information on an arbitrary frequency value that can be used to transmit a CW signal. If one order value indicates a PRB index, the CW node may select at least one of the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to the at least one selected subcarrier index. If one order value indicates a subcarrier index, the CW node may transmit the CW signal to the I-node using a frequency according to the indicated subcarrier index. If the order value indicates a frequency value, the CW node may transmit the CW signal to the I-node using a frequency according to the indicated frequency value. In this way, the CW node may transmit a single-tone CW signal to the I-node.

[0107] The transmission frequency indication information may include one order value. The one order value may indicate at least one of information on indices of PRBs including subcarriers that can be used to transmit a CW signal, information on indices of arbitrary subcarriers that can be used to transmit a CW signal, or information on values ​​of arbitrary frequencies that can be used to transmit a CW signal.

[0108] When one of the order values ​​indicates PRB indices, the CW node can select at least one subcarrier index from subcarrier indices included in each PRB indicated by the PRB indices, and transmit a CW signal to the I-node using a frequency according to the selected at least one subcarrier index. When one of the order values ​​indicates subcarrier indices, the CW node can transmit CW signals to the I-node using frequencies according to the indicated subcarrier indices. When the order value indicates frequency values, the CW node can transmit CW signals to the I-node using frequencies according to the indicated frequency values. In this way, the CW node can transmit a CW signal of multiple tones to the I-node.

[0109] The transmission frequency indication information may include two or more order values. Each of the two or more order values ​​may indicate at least one of information on the index of a PRB including a subcarrier that can be used to transmit a CW signal, information on an arbitrary subcarrier index that can be used to transmit a CW signal, or information on an arbitrary frequency value that can be used to transmit a CW signal. If each order value indicates a PRB index, the CW node may select any one of the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to the selected subcarrier index. If each order value indicates a subcarrier index, the CW node may transmit the CW signal to the I-node using a frequency according to the indicated subcarrier index. If each order value indicates a frequency value, the CW node may transmit the CW signal to the I-node using a frequency according to the indicated frequency value.

[0110] Each of two or more order values ​​can indicate at least one of information on indexes of PRBs including subcarriers that can be used to transmit a CW signal, information on arbitrary subcarrier indexes that can be used to transmit a CW signal, or information on arbitrary frequency values ​​that can be used to transmit a CW signal. When each order value indicates a PRB index, the CW node can select at least one subcarrier index from the subcarrier indexes included in each PRB indicated by the PRB indexes, and transmit at least one CW signal to the I-node using a frequency according to the selected at least one subcarrier index. When each order value indicates a subcarrier index, the CW node can transmit CW signals to the I-node using frequencies according to the indicated subcarrier indexes. When each order value indicates a frequency value, the CW node can transmit CW signals to the I-node using frequencies according to the indicated frequency values. In this way, the CW node can transmit a multi-tone CW signal to the I-node.

[0111] A base station can transmit configuration information including time resource configuration information capable of transmitting a CW signal to a CW node using an RRC message. The CW node can receive configuration information including time resource configuration information capable of transmitting a CW signal from the base station via an RRC message. In this way, the RRC message can include time resource configuration information capable of transmitting a CW signal. The time resource configuration information can be information about transmittable time intervals in which the CW node can transmit a CW signal or resource pool information. The time resource configuration information can be configured to be periodically repeated during a certain time interval.

[0112] Time resource configuration information can be defined as a slot or OFDM symbol, which is a time unit for the downlink or uplink of a mobile communication network. For example, the time resource configuration information may include the starting point of a slot at which a time interval begins, slot index information, and information on the number of consecutive slots. For example, the time resource configuration information may include the starting point of a slot at which a time interval begins, slot index information, and the ending point of a slot at which a time interval ends, slot index information.

[0113] The time resource configuration information may include, for example, the point in time of the OFDM symbol at which the time interval begins or the index information of the OFDM symbol and the number of consecutive OFDM symbols. The time resource configuration information may include, for example, the point in time of the OFDM symbol at which the time interval begins or the index information of the OFDM symbol and the point in time of the OFDM symbol at which the time interval ends or the index information of the OFDM symbol.

[0114] The time resource configuration information may include, for example, only time interval information. The base station may transmit the time resource configuration information to the CW node. The CW node may receive the time resource configuration information from the base station. The CW node may transmit a CW signal to the I-node after an arbitrary offset based on the time point at which the time resource configuration information is received. Here, the time point at which the time point is received may be the slot index of a slot including the time resource configuration information in the downlink control information of the base station. Alternatively, the time point at which the time point is received may be the start or last time boundary of a slot including the time resource configuration information in the downlink control information.

[0115] The time resource configuration information may include, for example, time interval information to be transmitted and period information. The CW node may receive the time resource configuration information from the base station. The CW node may periodically transmit a CW signal to the I-node after a certain offset based on the time point at which the time resource configuration information is received. Here, the time point at which the time point is received may be the slot index of a slot that includes the time resource configuration information in the downlink control information. Alternatively, the time point at which the time point is received may be the start or last time boundary of a slot that includes the time resource configuration information in the downlink control information.

[0116] Time resource configuration information can be configured as a combination of some of the examples described above. The time resource configuration information can be dynamically set or instructed to the I-node by being included in the base station downlink control information. The base station can transmit the time resource configuration information to the I-node by including it in the control information or data information of the R2D link. The I-node can receive the time resource configuration information from the base station through the control information or data information of the R2D link.

[0117] Time resource configuration information may be composed of one or more sets or lists of information in one or more combinations. The base station may transmit time resource configuration information including one or more sets or lists of information to the CW node using a higher-layer message. The CW node may receive time resource configuration information including one or more sets or lists of information from the base station using a higher-layer message. The CW node may transmit a CW signal to the I-node according to the time resource configuration information received via the higher-layer message.

[0118] The base station can transmit transmission time indication information, which indicates the time resources that can transmit the CW signal to be used for actual transmission, to the CW node through an RRC message or downlink control information. The CW node can receive transmission time indication information, which indicates the time resources that can transmit the CW signal to be used for actual transmission, from the base station through an RRC message or downlink control information. The transmission time indication information can be transmission indication information.

[0119] The transmission time indication information may be information indicating the start of transmission of a CW signal. The CW node may start transmitting the CW signal according to the information indicating the start of transmission. The transmission time indication information may be information indicating the activation of transmission of the CW signal. The CW node may start transmitting the CW signal according to the information indicating the activation of transmission. The transmission time indication information may be information indicating the end of transmission of the CW signal. The CW node may end transmission of the CW signal according to the information indicating the end of transmission. The transmission time indication information may be information indicating the deactivation of transmission of the CW signal. The CW node may deactivate transmission of the CW signal according to the information indicating the deactivation of transmission.

[0120] The transmission time indication information may include offset information indicating a certain time interval from the time of receiving the downlink control information. The CW node may transmit the CW signal to the I-node after a certain time interval according to the offset information has elapsed from the time of receiving the downlink control information. The transmission time indication information may be information indicating the deactivation of transmission of the CW signal. The CW node may terminate the transmission of the CW signal according to the information indicating the deactivation of transmission.

[0121] A CW node can dynamically transmit a CW signal to an I-node according to transmission time indication information received through downlink control information in time resource configuration information received through an upper layer message. The downlink control information may include CW signal time resource configuration information or transmission time indication information. When the downlink control information includes CW signal time resource configuration information or transmission time indication information, the downlink control information may be configured and transmitted in a common control information type. The CW node can monitor the common control information and check the time resource configuration information or the transmission time indication information. Alternatively, the base station can transmit the time resource configuration information or the transmission time indication information through the common control information at any period. The CW node can periodically monitor the common control information and check the time resource configuration information or the transmission time indication information in the common control information.

[0122] The base station can transmit configuration information including transmission power setting information of the CW signal to the CW node using an RRC message. The CW node can receive configuration information including transmission power setting information of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with a transmission power according to the received transmission power setting information.

[0123] The base station can transmit configuration information including transmission power setting information for each of two single tones of the CW signal to the CW node using an RRC message. The CW node can receive configuration information including transmission power setting information for each of two single tones of the CW signal from the base station via an RRC message. The CW node can transmit the two single tones of the CW signal at a transmission power according to the transmission power setting information for each of the two received single tones.

[0124] A base station can transmit configuration information including increase information for increasing the transmission power of a CW signal to a CW node using downlink control information. The CW node can receive configuration information including increase information for increasing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the increased transmission power according to the received increase information. The base station can transmit configuration information including decrease information for reducing the transmission power of the CW signal to the CW node using downlink control information. The CW node can receive configuration information including decrease information for reducing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the reduced transmission power according to the received decrease information.

[0125] Second embodiment of setting information of CW signal

[0126] The configuration information of the CW signal may include frequency resource configuration information for transmitting the CW signal, time resource configuration information for transmitting the CW signal, transmission power configuration information for transmitting the CW signal, etc. The base station may transmit the configuration information of the CW signal to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node may receive the configuration information of the CW signal from the base station through an RRC message (or a higher layer message) and / or downlink control information. The base station may transmit the frequency resource configuration information of the CW signal to the CW node. The CW node may receive the frequency resource configuration information of the CW signal from the base station. The base station may transmit the time resource configuration information of the CW signal to the CW node. The CW node may receive the time resource configuration information of the CW signal from the base station. The base station may transmit the transmission power configuration information of the CW signal to the CW node. The CW node may receive the transmission power configuration information of the CW signal from the base station.

[0127] The base station can provide configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node can receive configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information from the base station through an RRC message (or a higher layer message) and / or downlink control information.

[0128] The frequency resource configuration information may be information on the index of a PRB including a subcarrier that can be used to transmit a CW signal from a CW node. In this case, when the CW node receives the frequency resource configuration information including the PRB index, the CW node may select at least one of the subcarrier indices included in the PRB indicated by the received PRB index, and transmit the CW signal to the I-node using a frequency according to at least one of the selected subcarrier indices. The CW node may transmit a single-tone CW signal to the I-node. Alternatively, the CW node may transmit a multi-tone CW signal to the I-node.

[0129] The frequency resource configuration information may be information on the indexes of PRBs including subcarrier(s) that can be used to transmit a CW signal from a CW node. In this case, when the CW node receives the frequency resource configuration information including the PRB indices, the CW node may select at least one of the subcarrier indices included in each of the PRBs indicated by the received PRB indices, and transmit the CW signal to the I-node using the frequency according to at least one of the selected subcarrier indices. In this way, the CW node may transmit a CW signal of multiple tones to the I-node.

[0130] Alternatively, when the CW node receives frequency resource configuration information including PRB indices, it can select one PRB index from the received PRB indices. The CW node can select at least one subcarrier index included in the selected one PRB, and transmit a CW signal to the I-node using a frequency according to at least one of the selected subcarrier indices. In this way, the CW node can transmit a multi-tone CW signal to the I-node.

[0131] The base station can transmit an RRC message containing information about configurable frequency resources to the CW node. The CW node can receive an RRC message containing information about configurable frequency resources from the base station. The configurable frequency resource information may be information about the index(es) of PRB(s) containing subcarrier(s) that can be used by the CW node to transmit CW signals. The configurable frequency resource information may be frequency resource configuration information.

[0132] A base station can configure information about configurable frequency resources as a table having at least one order value (table index value) and at least one frequency resource corresponding to each order value. The information about at least one frequency resource corresponding to each order value may be information about index(es) of PRB(s) including subcarrier(s) that can be used to transmit a CW signal. In other words, the information about the frequency resource corresponding to each order value may be information about the index of a PRB including a subcarrier that can be used to transmit a CW signal. Alternatively, the information about the frequency resource corresponding to each order value may be information about the indexes of PRBs including subcarriers that can be used to transmit a CW signal.

[0133] Information about configurable frequency resources may be a frequency resource configuration information set or a frequency resource set. The base station may transmit information about a table consisting of a frequency resource configuration information set (or frequency resource set) to the CW node. The CW node may receive information about a table consisting of a frequency resource configuration information set from the base station.

[0134] A CW node may use the frequency resource with the lowest order value to transmit a CW signal, unless otherwise instructed. The table may contain information about one frequency resource. In this case, the CW node may generate a CW signal using one frequency resource included in the table and transmit the generated CW signal to the I-node. The CW signal may be a single tone. The table may contain information about two or more frequency resources. In this case, the CW node may generate CW signals using two or more frequency resources included in the table and transmit the generated CW signals to the I-node. The CW signals may be multi-tone.

[0135] The base station can transmit transmission frequency indication information (e.g., an order value) indicating the configurable frequency resources to be used for actual transmission among the configurable frequency resources in the table to the CW node through an RRC message or downlink control information. The CW node can receive transmission frequency indication information (e.g., an order value) indicating the frequency resource configuration information to be used for actual transmission among the frequency resource configuration information in the table from the base station. Information about the configurable frequency resources to be used for actual transmission may be information about the frequency resources used for actual transmission.

[0136] The CW node can transmit a CW signal to the I-node using frequency resources according to the received transmission frequency indication information. In this way, the CW node can generate a CW signal based on the received frequency resource setting information and transmit the generated CW signal to the I-node.

[0137] The transmission frequency indication information may include one order value. One order value may indicate information on the index of a PRB including a subcarrier that can be used to transmit a CW signal. When one order value indicates a PRB index, the CW node may select any one of the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using the frequency according to the selected subcarrier index. Alternatively, when one order value indicates a PRB index, the CW node may exclude subcarriers for guard bands on both sides within the PRB indicated by the PRB index, and select any subcarrier among the middle N subcarriers, and transmit the CW signal to the I-node using the selected subcarrier. When one order value indicates a subcarrier index within the PRB, the CW node may transmit the CW signal to the I-node using the frequency according to the indicated subcarrier index. N may be a positive integer.

[0138] The transmission frequency indication information may include one order value. One order value may indicate information on the indexes of PRBs including subcarriers that can be used to transmit a CW signal. When the order value indicates PRB indices, the CW node may select one subcarrier index from the subcarrier indices included in each PRB indicated by the PRB indices, and transmit the CW signal to the I-node using the frequency according to the selected subcarrier index. The CW node may select an available subcarrier within one PRB defined in advance as a standard among the PRB indices, and transmit the CW signal to the I-node using the selected subcarrier. Alternatively, when one order value indicates a PRB index, the CW node may exclude subcarriers for both guard bands within the PRB indicated by the PRB index, select an arbitrary subcarrier from among the middle N subcarriers, and transmit the CW signal to the I-node using the selected subcarrier. A CW node can transmit a CW signal to an I-node using a frequency according to the indicated subcarrier index when one order value indicates a subcarrier index within a PRB.

[0139] The transmission frequency indication information may include two or more order values. Each of the two or more order values ​​may indicate information on the index of a PRB including a subcarrier that can be used to transmit a CW signal. When each order value indicates a PRB index, the CW node may select any one of the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to the selected subcarrier index. When each order value indicates a PRB index, the CW node may select any one of the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to the selected subcarrier index. Alternatively, when each order value indicates a PRB index, the CW node may exclude subcarriers for both guard bands within the PRB indicated by the PRB index, select an arbitrary subcarrier from among the middle N subcarriers, and transmit the CW signal using the selected subcarrier. A CW node can transmit a CW signal to an I-node using a frequency according to the indicated subcarrier index, if each order value indicates a subcarrier index within a PRB.

[0140] Each of two or more order values ​​can indicate information on indexes of PRBs including subcarriers that can be used to transmit a CW signal. When each of two or more order values ​​indicates a PRB index, the CW node can select one subcarrier index from the subcarrier indices included in each PRB indicated by the PRB indexes, and transmit the CW signal to the I-node using a frequency according to the selected subcarrier index. When each of two or more order values ​​indicates a PRB index, the CW node can select one subcarrier index from the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to the selected subcarrier index. When each of two or more order values ​​indicates a PRB index, the CW node can select one subcarrier index from the subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to the selected subcarrier index. Alternatively, the CW node may exclude subcarriers for both guard bands within the PRB indicated by the PRB index if each of two or more order values ​​indicates a PRB index, select an arbitrary subcarrier among the middle N subcarriers, and transmit a CW signal using the selected subcarrier. The CW node may transmit a CW signal to the I-node using a frequency according to the indicated subcarrier index if each of two or more order values ​​indicates a subcarrier index within the PRB.

[0141] A base station can transmit configuration information including time resource configuration information capable of transmitting a CW signal to a CW node using an RRC message. The CW node can receive configuration information including time resource configuration information capable of transmitting a CW signal from the base station via an RRC message. In this way, the RRC message can include time resource configuration information capable of transmitting a CW signal. The time resource configuration information can be information about transmittable time intervals in which the CW signal can be transmitted from the CW node or resource pool information. The time resource configuration information can be configured to be periodically repeated during a predetermined time interval. The CW node can select at least one or more of the time intervals in which the CW signal can be transmitted included in the configuration information and transmit the CW signal. In this way, the CW node can transmit the CW signal to the I-node in at least one or more time intervals by using the time resource configuration information of the configuration information included in the RRC message.

[0142] The base station can transmit transmission time indication information indicating the time resources that can transmit the CW signal used for actual transmission from the time resources that can transmit the CW signal to the CW node through an RRC message or downlink control information. The CW node can receive transmission time indication information indicating the time resources that can transmit the CW signal used for actual transmission from the base station through an RRC message or downlink control information.

[0143] The transmission time indication information may be information indicating the start of transmission of a CW signal. The CW node may start transmitting the CW signal according to the information indicating the start of transmission. The transmission time indication information may be information indicating the activation of transmission of the CW signal. The CW node may start transmitting the CW signal according to the information indicating the activation of transmission. The transmission time indication information may be information indicating the end of transmission of the CW signal. The CW node may end transmission of the CW signal according to the information indicating the end of transmission. The information may be information indicating the deactivation of transmission of the CW signal. The CW node may deactivate transmission of the CW signal according to the information indicating the deactivation of transmission.

[0144] The transmission time indication information may include offset information indicating a certain time interval from the time of receiving the downlink control information. The CW node may transmit the CW signal after a certain time interval according to the offset has elapsed from the time of receiving the downlink control information according to the offset information. The transmission time indication information may be information indicating the deactivation of transmission of the CW signal. The CW node may terminate the transmission of the CW signal according to the information indicating the deactivation of transmission. The time resource setting information and the transmission time indication information according to Embodiment 1 may be equally applied to Embodiment 2.

[0145] The base station can transmit configuration information including transmission power setting information of the CW signal to the CW node using an RRC message. The CW node can receive configuration information including transmission power setting information of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with a transmission power according to the received transmission power setting information.

[0146] The base station can transmit configuration information including transmission power setting information for each of two single tones of the CW signal to the CW node using an RRC message. The CW node can receive configuration information including transmission power setting information for each of two single tones of the CW signal from the base station via an RRC message. The CW node can transmit the two single tones of the CW signal at a transmission power according to the transmission power setting information for each of the two received single tones.

[0147] A base station can transmit configuration information including increase information for increasing the transmission power of a CW signal to a CW node using downlink control information. The CW node can receive configuration information including increase information for increasing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the increased transmission power according to the received increase information. The base station can transmit configuration information including decrease information for reducing the transmission power of the CW signal to the CW node using downlink control information. The CW node can receive configuration information including decrease information for reducing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the reduced transmission power according to the received decrease information.

[0148] Third embodiment of setting information of CW signal

[0149] The configuration information of the CW signal may include frequency resource configuration information for transmitting the CW signal, time resource configuration information for transmitting the CW signal, transmission power configuration information for transmitting the CW signal, etc. The base station may transmit the configuration information of the CW signal to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node may receive the configuration information of the CW signal from the base station through an RRC message (or a higher layer message) and / or downlink control information. The base station may transmit the frequency resource configuration information of the CW signal to the CW node. The CW node may receive the frequency resource configuration information of the CW signal from the base station. The base station may transmit the time resource configuration information of the CW signal to the CW node. The CW node may receive the time resource configuration information of the CW signal from the base station. The base station may transmit the transmission power configuration information of the CW signal to the CW node. The CW node may receive the transmission power configuration information of the CW signal from the base station.

[0150] The base station can provide configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node can receive configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information from the base station through an RRC message (or a higher layer message) and / or downlink control information.

[0151] Frequency resource configuration information may include an index of a PRB including subcarriers that can be used to transmit CW signals from a CW node, and information on any subcarrier within the PRB. The subcarrier information may be, for example, subcarrier index information.

[0152] In this case, the CW node can receive frequency resource configuration information including a PRB index and any subcarrier information within the PRB, and transmit a CW signal using a frequency according to the indicated subcarrier index included in the PRB indicated by the received PRB index. In this way, the CW node can transmit a single-tone CW signal to the I-node.

[0153] The frequency resource configuration information may be indices of physical resource blocks (PRBs) including subcarrier(s) that can be used to transmit a CW signal in a CW node, and information on arbitrary subcarriers within each PBR. The subcarrier information may be information on subcarrier indices. In this case, when the CW node receives frequency resource configuration information including PRB indices and information on arbitrary subcarriers within each PBR, the CW node may select at least one of the subcarrier indices included in each of the PRBs indicated by the received PRB indices, and transmit a CW signal to the I-node using a frequency according to at least one of the selected subcarrier indices. In this way, the CW node may transmit a CW signal of multiple tones to the I-node.

[0154] The base station can transmit an RRC message containing information about configurable frequency resources to the CW node. The CW node can receive an RRC message containing information about configurable frequency resources from the base station. The configurable frequency resource configuration information may be information about the index(es) of PRB(s) containing subcarrier(s) that can be used to transmit CW signals from the CW node and the subcarrier index(es) within each PRB. The information about configurable frequency resources may be frequency resource configuration information.

[0155] A base station may configure information about configurable frequency resources as a table having at least one or more order values ​​(table index values) and information about at least one frequency resource corresponding to each order value. The information about at least one or more frequency resources corresponding to each order value may be information about index(es) of PRB(s) including subcarrier(s) that can be used to transmit a CW signal and information about the index of any one or more subcarriers within each PRB.

[0156] In other words, the information about the frequency resources corresponding to each order value may be information about the index of a PRB including subcarriers that can be used to transmit a CW signal and information about the index of one subcarrier within the PRB. The information about the frequency resources corresponding to each order value may be information about the indexes of PRBs including subcarriers that can be used to transmit a CW signal and information about the index of at least one subcarrier within each PRB.

[0157] Information about configurable frequency resources may be a frequency resource configuration information set or a frequency resource set. The base station may transmit information about a table consisting of a frequency resource configuration information set (or frequency resource set) to the CW node. The CW node may receive information about a table consisting of a frequency resource configuration information set from the base station.

[0158] A CW node may use the frequency resource with the lowest order value to transmit a CW signal, unless otherwise instructed. The table may contain information about one frequency resource. In this case, the CW node may generate a CW signal using one frequency resource included in the table and transmit the generated CW signal to the I-node. The CW signal may be a single tone. The table may contain information about two or more frequency resources. In this case, the CW node may generate CW signals using two or more frequency resources included in the table and transmit the generated CW signal to the I-node. The CW signals may be multi-tone.

[0159] The base station can transmit transmission frequency indication information (e.g., an order value) indicating configurable frequency resources to be used for actual transmission among the configurable frequency resources in the table to the CW node through an RRC message or downlink control information. The CW node can receive transmission frequency indication information (e.g., an order value) indicating frequency resource configuration information to be used for actual transmission among the frequency resource configuration information in the table from the base station. The CW node can transmit a CW signal to the I-node using a frequency resource according to the received transmission frequency indication information. In this way, the CW node can generate a CW signal based on the received frequency resource configuration information and transmit the generated CW signal to the I-node. Information about configurable frequency resources to be used for actual transmission may be frequency resource information used for actual transmission.

[0160] The transmission frequency indication information may include one sequence value. One sequence value may indicate the index of a PRB including subcarriers that can be used to transmit a CW signal and information on the subcarrier index within the PRB. If one sequence value indicates the PRB index and the subcarrier index within the PRB, the CW node may transmit the CW signal to the I-node using the frequency according to the indicated subcarrier index included in the PRB indicated by the PRB index.

[0161] The transmission frequency indication information may include one order value. One order value may indicate an index of a PRB including subcarriers that can be used to transmit a CW signal and information on subcarrier indices within the PRB. When one order value indicates a PRB index and subcarrier indices within the PRB, the CW node may select one of the indicated subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to one of the selected subcarrier indices.

[0162] The transmission frequency indication information may include one order value. The order value may indicate the indices of PRBs including subcarriers that can be used to transmit a CW signal and information on an arbitrary subcarrier index within each PRB. If the order value indicates the PRB indices and each arbitrary subcarrier index within the PRB, the CW node may transmit the CW signal to the I-node using a frequency according to the indicated subcarrier index within the indicated PRB indices.

[0163] The transmission frequency indication information may include one order value. The order value may indicate information on the indices of PRBs including subcarriers that can be used to transmit a CW signal and information on arbitrary subcarrier indices within each PRB. If the order value indicates the PRB indices and each arbitrary subcarrier indices within the PRB, the CW node may transmit the CW signal to the I-node using the frequency according to the indicated subcarrier indices within the indicated PRB indices.

[0164] The transmission frequency indication information may include two or more order values. Each of the two or more order values ​​may indicate an index of a PRB including a subcarrier that can be used to transmit a CW signal and information on an arbitrary subcarrier index within the PRB. Each of the two or more order values ​​may indicate an index of a PRB including a subcarrier that can be used to transmit a CW signal and information on an index of a subcarrier within the PRB. When each order value indicates a PRB index and a subcarrier index within the PRB, the CW node may transmit a CW signal to the I-node using a frequency according to the indicated subcarrier index included in the PRB indicated by the PRB index.

[0165] Each of two or more order values ​​can indicate an index of a PRB including a subcarrier that can be used to transmit a CW signal and information on subcarrier indices within the PRB. When each order value indicates a PRB index and subcarrier indices within the PRB, the CW node can select any one of the indicated subcarrier indices included in the PRB indicated by the PRB index, and transmit the CW signal to the I-node using a frequency according to any one of the selected subcarrier indices.

[0166] Each of two or more order values ​​can indicate the indexes of PRBs including subcarriers that can be used to transmit a CW signal and information on arbitrary subcarrier indices within each PRB. When each order value indicates the PRB indices and each arbitrary subcarrier indices within the PRB, the CW node can transmit the CW signal to the I-node using a frequency according to the indicated subcarrier indices within the indicated PRB indices.

[0167] Each of two or more order values ​​can indicate information on the indexes of PRBs including subcarriers that can be used to transmit a CW signal and information on arbitrary subcarrier indices within each PRB. If each order value indicates the PRB indices and each arbitrary subcarrier indices within the PRB, the CW node can transmit the CW signal to the I-node using a frequency according to the indicated subcarrier indices within the indicated PRB indices.

[0168] A base station can transmit configuration information including time resource configuration information capable of transmitting a CW signal to a CW node using an RRC message. The CW node can receive configuration information including time resource configuration information capable of transmitting a CW signal from the base station via an RRC message. In this way, the RRC message can include time resource configuration information capable of transmitting a CW signal. The time resource configuration information can be information about transmittable time intervals in which the CW signal can be transmitted from the CW node or resource pool information. The time resource configuration information can be configured to be periodically repeated during a predetermined time interval. The CW node can select at least one or more of the time intervals in which the CW signal can be transmitted included in the configuration information and transmit the CW signal. In this way, the CW node can transmit the CW signal to the I-node in at least one or more time intervals by using the time resource configuration information of the configuration information included in the RRC message.

[0169] The base station can transmit transmission time indication information indicating the time resources that can transmit the CW signal used for actual transmission from the time resources that can transmit the CW signal to the CW node through an RRC message or downlink control information. The CW node can receive transmission time indication information indicating the time resources that can transmit the CW signal used for actual transmission from the base station through an RRC message or downlink control information.

[0170] The transmission time indication information may be information indicating the start of transmission of a CW signal. The CW node may start transmitting the CW signal according to the information indicating the start of transmission. The transmission time indication information may be information indicating the activation of transmission of the CW signal. The CW node may start transmitting the CW signal according to the information indicating the activation of transmission. The transmission time indication information may be information indicating the end of transmission of the CW signal. The CW node may end transmission of the CW signal according to the information indicating the end of transmission. The transmission time indication information may be information indicating the deactivation of transmission of the CW signal. The CW node may deactivate transmission of the CW signal according to the information indicating the deactivation of transmission.

[0171] The transmission time indication information may include offset information indicating a certain time interval from the time of receiving the downlink control information. The CW node may transmit the CW signal after a certain time interval according to the offset has elapsed from the time of receiving the downlink control information according to the offset information. The transmission time indication information may be information indicating the deactivation of transmission of the CW signal. The CW node may terminate the transmission of the CW signal according to the information indicating the deactivation of transmission. The time resource setting information and the transmission time indication information according to Embodiment 1 may be equally applied to Embodiment 3.

[0172] The base station can transmit configuration information including transmission power setting information of the CW signal to the CW node using an RRC message. The CW node can receive configuration information including transmission power setting information of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with a transmission power according to the received transmission power setting information.

[0173] The base station can transmit configuration information including transmission power setting information for each of two single tones of the CW signal to the CW node using an RRC message. The CW node can receive configuration information including transmission power setting information for each of two single tones of the CW signal from the base station via an RRC message. The CW node can transmit the two single tones of the CW signal at a transmission power according to the transmission power setting information for each of the two received single tones.

[0174] A base station can transmit configuration information including increase information for increasing the transmission power of a CW signal to a CW node using downlink control information. The CW node can receive configuration information including increase information for increasing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the increased transmission power according to the received increase information. The base station can transmit configuration information including decrease information for reducing the transmission power of the CW signal to the CW node using downlink control information. The CW node can receive configuration information including decrease information for reducing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the reduced transmission power according to the received decrease information.

[0175] Fourth embodiment of setting information of CW signal

[0176] The configuration information of the CW signal may include frequency resource configuration information for transmitting the CW signal, time resource configuration information for transmitting the CW signal, transmission power configuration information for transmitting the CW signal, etc. The base station may transmit the configuration information of the CW signal to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node may receive the configuration information of the CW signal from the base station through an RRC message (or a higher layer message) and / or downlink control information. The base station may transmit the frequency resource configuration information of the CW signal to the CW node. The CW node may receive the frequency resource configuration information of the CW signal from the base station. The base station may transmit the time resource configuration information of the CW signal to the CW node. The CW node may receive the time resource configuration information of the CW signal from the base station. The base station may transmit the transmission power configuration information of the CW signal to the CW node. The CW node may receive the transmission power configuration information of the CW signal from the base station.

[0177] The base station can provide configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information to the CW node through an RRC message (or a higher layer message) and / or downlink control information. The CW node can receive configuration information including at least one of frequency resource configuration information, time resource configuration information, or transmission power configuration information from the base station through an RRC message (or a higher layer message) and / or downlink control information.

[0178] Frequency resource configuration information may include index(es) information of PRB(s) including subcarrier(s) to be used for a CW signal, subcarrier(s) index(es) information within each PRB, hopping pattern information, etc. The hopping pattern may include frequency hopping. For a more specific example, subcarrier positions may be changed according to a hopping pattern defined in a fixed time unit. The defined hopping pattern may be defined by one or more hopping patterns. Any CW node may receive a hopping pattern to be used from a base station. The base station may transmit configuration information including time information of CW signal(s) transmitted by applying frequency hopping to the CW node. The CW node may receive configuration information including time information of CW signal(s) transmitted by applying frequency hopping from the base station. The base station may transmit configuration information including transmission power configuration information of the CW signal to the CW node. The CW node may receive configuration information including transmission power configuration information of the CW signal from the base station. The base station can provide configuration information to the CW node via an RRC message (or a higher layer message) and / or downlink control information. The CW node can receive configuration information from the base station via an RRC message (or a higher layer message) and / or downlink control information.

[0179] For example, the base station can transmit information about the indexes of PRBs that enable frequency hopping, the indexes of subcarriers within the PRBs, and / or the hopping pattern to the CW node via an RRC message. A set of all configurable PRB indexes, the indexes of subcarriers within the PRBs, and / or the hopping pattern can be configured as a table having an order value (table index value). The base station can transmit information about the configured table to the CW node. The CW node can receive information about the table from the base station. The table can include one frequency resource information for one single tone. The table can include two frequency resource information for two single tones.

[0180] In the absence of other instructions, the CW node can use the frequency resource information with the lowest order value to transmit a CW signal using frequency hopping. The base station can include transmission frequency indication information that can indicate a PRB index, subcarrier index, or hopping pattern used for actual transmission among table information in the configuration information of an RRC message and transmit it to the CW node. The CW node can receive transmission frequency indication information that can indicate a PRB index, subcarrier index, or hopping pattern used for actual transmission among table information from the base station. The CW node can transmit the CW signal to the I-node by applying frequency hopping using the PRB, subcarrier, and hopping pattern according to the received transmission frequency indication information. In this way, the CW node can generate a CW signal based on the PRB index, subcarrier index, and hopping pattern among the received table information and transmit the generated CW signal to the I-node. Information about configurable frequency resources used for actual transmission may be frequency resource information used for actual transmission.

[0181] The base station can include indication information that can indicate a PRB index, a subcarrier index, or a hopping pattern used for actual transmission among table information in the downlink control information and transmit it to the CW node. The CW node can receive transmission frequency indication information that can indicate a PRB index, a subcarrier index, or a hopping pattern used for actual transmission among the table information from the base station. The CW node can transmit a CW signal to the I-node using the PRB, subcarrier, and hopping pattern according to the received transmission frequency indication information. In this way, the CW node can generate a CW signal based on the PRB index, the subcarrier index, and the hopping pattern among the received table information and transmit the generated CW signal to the I-node.

[0182] A base station can transmit time resource configuration information including time resource information for transmitting a CW signal by applying frequency hopping to a CW node using an RRC message. The CW node can receive time resource configuration information including time resource information for transmitting a CW signal by applying frequency hopping from the base station via an RRC message. In this way, the RRC message can include time resource configuration information for transmitting a CW signal by applying frequency hopping. The time resource configuration information can be information on a transmittable time interval or resource pool in which the CW node can transmit a CW signal by applying frequency hopping. The time resource configuration information can be configured to be periodically repeated during a certain time interval. The CW node can transmit a CW signal to an I-node by applying frequency hopping during the corresponding time interval by using the time resource configuration information of the configuration information included in the RRC message.

[0183] A base station can transmit configuration information including actual transmission time indication information of a CW signal to a CW node using an RRC message. The CW node can receive configuration information including actual transmission time indication information of a CW signal from the base station through an RRC message. In this way, the RRC message can include actual transmission time indication information for transmitting a CW signal. The actual transmission time indication information can be indicated by a transmission start or a transmission end. The transmission start can be an active start. The transmission end can be an inactive start. The actual transmission time indication information can be defined as a certain time interval information. The CW node can transmit a CW signal to an I-node according to the actual transmission indication information among the transmittable time intervals of the CW signal in the configuration information included in the RRC message.

[0184] A base station can transmit configuration information including actual transmission time indication information of a CW signal to a CW node using downlink control information. The CW node can receive configuration information including actual transmission time indication information of a CW signal from the base station through downlink control information. The actual transmission time indication information can be indicated by a transmission start or a transmission end. The transmission start can be an active start. The transmission end can be an inactive start. The actual transmission time indication information can be defined as certain time interval information. The CW node can transmit the CW signal at a transmission start time instructed to be transmitted according to the actual transmission time indication information among the transmittable time intervals of the CW signal in the configuration information included in the downlink control information. The CW node can receive the downlink control information and configure and transmit the CW signal after an arbitrary time length. The time resource configuration information and the transmission time indication information according to Embodiment 1 can be equally applied to Embodiment 4.

[0185] The base station can transmit transmission power setting information including transmission power information of the CW signal to the CW node using an RRC message. The CW node can receive transmission power setting information including transmission power information of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal to the I-node with a transmission power according to the received transmission power setting information.

[0186] The base station can transmit transmission power configuration information including transmission power information of each of two single tones of the CW signal to the CW node using an RRC message. The CW node can receive transmission power configuration information including transmission power information of each of two single tones of the CW signal from the base station using an RRC message. The CW node can transmit each of the two single tones of the CW signal to the I-node at a transmission power according to the transmission power information of each of the two single tones received.

[0187] A base station can transmit configuration information including increase information for increasing the transmission power of a CW signal to a CW node using downlink control information. The CW node can receive configuration information including increase information for increasing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal to the I-node with the increased transmission power according to the received increase information. The base station can transmit configuration information including decrease information for reducing the transmission power of the CW signal to the CW node using downlink control information. The CW node can receive configuration information including decrease information for reducing the transmission power of the CW signal from the base station via an RRC message. The CW node can transmit the CW signal with the reduced transmission power according to the received decrease information.

[0188] Meanwhile, the I-node performing the backscatter transmission can perform an IR transmission in response to the RI transmission. The IR transmission timing can be indicated by the R2D. Alternatively, the IR transmission timing can be performed after an arbitrary specified offset after the RI reception. The I-node can expect a CW signal to be transmitted. The I-node can perform the IR transmission using the CW signal.

[0189] Figure 5 is a conceptual diagram illustrating embodiments of a method for operating an Internet of Things device in a communication system.

[0190] Referring to FIG. 5, in the operating method of the Internet of Things device, a base station can perform an R node function and transmit data to an I node via an RI link. The I node can receive data from the base station via the RI link. A CW node can transmit a CW signal to the I node. The I node can receive a CW signal from the CW node. The I node can generate a backscattered signal containing data by reflecting the CW signal and transmit the generated backscattered signal to the base station via an IR link. The base station can receive the backscattered signal containing data via the IR link and obtain data from the received backscattered signal. In this way, the I node can receive data from the base station via the RI link and transmit data to the base station by backscatter in response thereto. The I node may not perform backscatter transmission for any CW signal.

[0191] The base station can transmit an upper message containing configuration information of a CW signal to the CW node. The CW node can receive the upper message from the base station. The CW node can obtain the configuration information of the CW signal from the received upper message. Alternatively, the base station can transmit downlink control information containing transmission instruction information of the CW signal to the CW node. The CW node can receive the downlink control information from the base station. The CW node can obtain transmission instruction information of the CW signal from the received downlink control information.

[0192] A base station can transmit downlink control information including transmission instruction information of a CW signal to a CW node. The transmission instruction information of the CW signal can include time resource information for transmission of the CW signal. The time resource information for transmission of the CW signal can include information about an offset indicating a slot for starting transmission of the CW signal based on a slot in which the downlink control information is received, information about a transmission length indicating a transmission duration of the CW signal, or information about a transmission cycle for periodic transmission of the CW signal. The transmission instruction information of the CW signal can include frequency resource information for transmission of the CW signal. The frequency resource information for transmission of the CW signal can include hopping pattern information for enabling transmission of the CW signal while hopping frequencies in the CW node.

[0193] A CW node can receive downlink control information from a base station. The CW node can obtain transmission instruction information for a CW signal from the received downlink control information. The CW node can obtain time resource information for starting transmission of a CW signal from the transmission instruction information for the acquired CW signal. The CW node can obtain offset information, transmission length information, or transmission period information from the time information for starting transmission of the acquired CW signal.

[0194] The CW node can transmit a CW signal to an IoT terminal based on the acquired offset information, transmission length information, or transmission period information. The CW node can start transmitting the CW signal in a slot that is offset by the acquired offset information from the slot in which the downlink control information is received. The CW node can continuously transmit the CW signal to the IoT terminal for a period corresponding to the transmission length acquired from the transmission length information. The CW node can repeatedly transmit the CW signal to the IoT terminal at the transmission period acquired from the transmission period information.

[0195] A CW node can obtain frequency resource information for transmitting a CW signal from the transmission instruction information of the CW signal. The CW node can also obtain hopping pattern information from the frequency resource information for transmitting the CW signal. The CW node can transmit the CW signal to an IoT terminal by hopping frequencies according to the hopping pattern information.

[0196] Meanwhile, a base station can transmit a CW signal to an IoT terminal. The base station can utilize a phase tracking reference signal (PTRS) as a CW signal. The base station can generate information for setting the PTRS as a CW signal. Such information for setting the PTRS as a CW signal may be PTRS configuration information that can be set as a CW signal. The base station can transmit the information for setting the PTRS as a CW signal to the in-node(s). The base station can transmit an RRC message including the PTRS configuration information that can be set as a CW signal to the in-node(s). The in-nodes can receive the RRC message from the base station. The in-nodes can obtain the PTRS configuration information that can be set as a CW signal from the RRC message.

[0197] Meanwhile, the terminal can transmit a CW signal to the IoT terminal. The terminal can utilize PTRS as a CW signal. The base station can generate information for setting the PTRS as a CW signal. This information for setting the PTRS as a CW signal can be PTRS configuration information that can be set as a CW signal. The base station can transmit the information for setting the PTRS as a CW signal to the terminal. The base station can transmit an RRC message containing the PTRS configuration information that can be set as a CW signal to the terminal. The terminal can receive the RRC message from the base station.

[0198] The terminal can obtain PTRS configuration information that can be configured as a CW signal from an RRC message. The base station can generate instruction information that instructs to configure and transmit PTRS as a CW signal. The base station can generate downlink control information that includes the instruction information that instructs to configure and transmit PTRS as a CW signal. The base station can transmit the downlink control information to the terminal. The terminal can receive the downlink control information from the base station.

[0199] The base station can obtain instruction information instructing to configure and transmit PTRS as a CW signal from the received downlink control information. The terminal can configure the PTRS as a CW signal and transmit it to the IoT terminal according to the instruction information instructing to configure and transmit PTRS as the acquired CW signal. The IoT terminal can receive the PTRS configured as a CW signal, and generate a backscatter signal containing data by reflecting the received PTRS and transmit it to the base station. The base station can receive the backscatter signal containing data and obtain data from the received backscatter signal.

[0200] Figure 6 is a flowchart illustrating embodiments of a method for operating an Internet of Things device in a communication system.

[0201] Referring to FIG. 6, in the operating method of an Internet of Things device, a base station can transmit resource configuration information of a CW signal to a CW terminal (S600). The CW terminal can receive resource configuration information of the CW signal from the base station. The base station can transmit resource configuration information of the CW signal to an IoT terminal as needed. The IoT terminal can receive resource configuration information of the CW signal from the base station. The base station can transmit downlink control information linked to the resource configuration information of the CW signal (S601). The CW terminal can receive downlink control information linked to the resource configuration information of the CW signal from the base station. The downlink control information can include transmission resource information. The transmission resource information can include transmission frequency resource configuration information, transmission time resource configuration information, transmission transmission power configuration information, etc.

[0202] The base station can transmit data to the IoT terminal by considering the resource configuration information of the CW signal (S602). In other words, the base station can identify the frequency resources, time resources, etc. of the CW signal transmitted from the CW terminal by referring to the resource configuration information of the CW signal. The base station may not use the identified frequency resources, time resources, etc. of the CW signal to transmit data to the IoT terminal. The base station can transmit data to the IoT terminal using different frequency resources, time resources, etc. than the identified frequency resources, time resources, etc. of the CW signal. The IoT terminal can receive data from the base station.

[0203] The base station may transmit backscattering transmission instruction information, including a backscattering transmission instruction that instructs the IoT terminal to perform backscattering transmission, taking into account the resource configuration information of the CW signal (S603). The IoT terminal may receive backscattering transmission instruction information from the base station. The backscattering transmission instruction information may include a backscattering transmission instruction, backscattering transmission frequency information, backscattering transmission time information, etc. The backscattering transmission frequency information may be the same as or similar to the transmission frequency information of the CW signal described above. The backscattering transmission time information may be the same as or similar to the transmission time information of the CW signal described above.

[0204] The CW terminal can transmit a CW signal to the IoT terminal using the transmission resource of the CW signal according to the transmission resource information of the CW signal indicated in the downlink control information (S604). The IoT terminal can receive the CW signal from the CW terminal. The IoT terminal can collect the necessary energy from the received CW signal. The IoT terminal can reflect the received CW signal with reference to the resource setting information of the CW signal, the backscatter indication information, etc., and modulate it into a backscatter signal including data. The IoT terminal can transmit the backscatter signal including data to the base station (S605). The base station can receive the backscatter signal including data from the IoT terminal and can demodulate the received backscatter signal to obtain data (S606).

[0205] The operations of the method according to the embodiments of the present disclosure can be implemented as a computer-readable program or code on a computer-readable recording medium. A computer-readable recording medium includes any type of recording device that stores information readable by a computer system. Furthermore, a computer-readable recording medium can be distributed across network-connected computer systems, allowing the computer-readable program or code to be stored and executed in a distributed manner.

[0206] Additionally, the computer-readable recording medium may include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. The program instructions may include not only machine language codes produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0207] While some aspects of the present disclosure have been described in the context of a device, they may also represent a description of a corresponding method, wherein a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be described as a corresponding block or item or a feature of a corresponding device. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, at least one or more of the most important method steps may be performed by such a device.

[0208] In embodiments, a programmable logic device (e.g., a field-programmable gate array) may be used to perform some or all of the functions of the methods described herein. In embodiments, the field-programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described herein. In general, the methods are preferably performed by some hardware device.

[0209] Although the present disclosure has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present disclosure without departing from the spirit and scope of the present disclosure as set forth in the claims below.

Claims

1. As a method of the first communication node, A step of receiving setting information of a CW (carrier wave) signal from a second communication node; A step of receiving transmission instruction information of the CW signal from the second communication node; and A step of transmitting the CW signal to a third communication node based on the above setting information and the above transmission instruction information, Method of the first communication node.

2. In claim 1, The above setting information is included in an upper layer message, and the upper layer message is received from the second communication node, The above transmission instruction information is included in downlink control information, and the downlink control information is received from the second communication node. Method of the first communication node.

3. In claim 1, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, The above frequency resource configuration information includes at least one of information on at least one PRB (physical resource block) index, information on at least one subcarrier index, or information on at least one frequency. Method of the first communication node.

4. In claim 1, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, The frequency resource setting information includes at least one of information about at least one PRB index indicated by at least one order value, information about at least one subcarrier index indicated by at least one order value, or information about at least one frequency indicated by at least one order value. Method of the first communication node.

5. In claim 1, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, When the frequency resource setting information includes at least one of information about at least one PRB index indicated by at least one order value, information about at least one subcarrier index indicated by at least one order value, or information about at least one frequency indicated by at least one order value, The above transmission instruction information includes at least one sequence value, Method of the first communication node.

6. As a method of the second communication node, A step of generating setup information for a CW (carrier wave) signal; A step of transmitting the above setting information to a first communication node; A step of generating transmission instruction information of the CW signal based on the above setting information; and comprising a step of transmitting the above transmission instruction information to the first communication node; Method of the second communication node.

7. In claim 6, A step of transmitting the above setting information to a third communication node; and Further comprising a step of transmitting first data to the third communication node in consideration of the above setting information. Method of the second communication node.

8. In claim 6, Further comprising the step of receiving a backscattered signal of the CW signal including second data from a third communication node. Method of the second communication node.

9. In claim 8, Further comprising a step of transmitting backscatter indication information to the third communication node before receiving the backscatter signal. Method of the second communication node.

10. In claim 6, The above setting information is included in an upper layer message, and the upper layer message is transmitted to the first communication node, The above transmission instruction information is included in downlink control information, and the downlink control information is transmitted to the first communication node. Method of the second communication node.

11. In claim 6, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, The above frequency resource configuration information includes at least one of information on at least one PRB (physical resource block) index, information on at least one subcarrier index, or information on at least one frequency. Method of the second communication node.

12. In claim 6, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, If the frequency resource setting information includes at least one of information about at least one PRB index indicated by at least one order value, information about at least one subcarrier index, or information about at least one frequency, The above transmission instruction information includes at least one sequence value, Method of the second communication node.

13. As the first communication node, comprising at least one processor, wherein said at least one processor comprises said first communication node; Receive setting information of a CW (carrier wave) signal from a second communication node; Receive transmission instruction information of the CW signal from the second communication node; and Causing the CW signal to be transmitted to a third communication node based on the above setting information and the above transmission instruction information, First communication node.

14. In claim 13, The above setting information is included in a higher layer message, and the at least one processor causes the first communication node to receive the higher layer message from the second communication node, The transmission instruction information is included in downlink control information, and the at least one processor causes the first communication node to receive the downlink control information from the second communication node. First communication node.

15. In claim 13, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, The above frequency resource configuration information includes at least one of information on at least one PRB (physical resource block) index, information on at least one subcarrier index, or information on at least one frequency. First communication node.

16. In claim 13, The above setting information includes at least one of frequency resource setting information, time resource setting information, or transmission power setting information, If the frequency resource setting information includes at least one of information about at least one PRB index indicated by at least one order value, information about at least one subcarrier index, or information about at least one frequency, The above transmission instruction information includes at least one sequence value, First communication node.

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