Method by which ambient IoT device transmits signal in wireless communication system and device therefor

Abstract

The present document relates to a method performed by an ambient Internet of Things (IoT) device in a wireless communication system supporting ambient IoT. To this end, the method performed by an ambient IoT device in a wireless communication system supporting ambient IoT devices comprises the steps of: receiving a first paging message from a reader; when available energy for signal transmission is not greater thane a threshold value, transmitting, to the reader, a first message including an energy indication related to a lack of the available energy; receiving a second paging message from the reader; and if the second paging message includes a random identifier (ID) of the first message, transmitting a third message to the reader.

Description

Method for an ambient IoT device to transmit a signal in a wireless communication system and device for the same

[0001] The following description relates to a wireless communication system supporting Ambient IoT (Internet of Things), specifically to a method for an Ambient IoT device to transmit a signal in a wireless communication system and a device for doing so.

[0002] 3GPP, which leads technical standards for mobile communication systems (3 rd Various technologies were introduced to support IoT devices in LTE and 5G through the Generation Partnership Project.

[0003] Figure 1 is a diagram briefly summarizing the requirements for IoT devices considered by 3GPP.

[0004] Figure 1 is a document presented at the 19th GSMA 5G IoT Strategy Group Meeting (January 2022), and illustrates a comparison of the performance of a Passive IoT UE, which was discussed in Rel-18 and is being discussed as Ambient IoT (hereinafter referred to as A-IoT) in Rel-19, with the transmission speeds of general NR LTE UEs, RedCap UEs, LTE-M UEs, and NB-IoT UEs.

[0005] While other IoT UEs are all powered by batteries, A-IoT devices generate their own power through energy harvesting, support low transmission speeds of 10 kbps, consume very low power of 1 to 100 uW, and are discussed based on the assumption of a large number of passive devices that are 10 to 100 times less expensive than NB-IoT UEs. In other words, the pyramid structure of Figure 1 can be interpreted to mean that the A-IoT devices at the bottom can be attached to more objects than other IoT devices.

[0006] Although various use cases for A-IoT are being discussed, the inventory use case as shown in Fig. 2 is being studied most intensively.

[0007] Figure 2 is a diagram illustrating an example of use in an automated warehouse as an example of the concept of an inventory use example among the use examples of A-IoT.

[0008] The concept of an automated warehouse illustrated in FIG. 2 illustrates a concept of using A-IoT in the stages of receiving into inventory (2), storing into inventory (3), and releasing from inventory (4) among the stages of receiving and unloading goods (1), receiving into inventory (2), storing in inventory (3), releasing from inventory (4), and receiving and loading goods (5).

[0009] That is, when receiving / shipping, an item list can be obtained using A-IoT, and if necessary, a base station (220) or another reader can obtain data by product group and manufacturer through a query to a large number of A-IoT devices (210a-210n) in the warehouse and transmit it to an A-IoT server (230) (S210).

[0010] In the case of the A-IoT method described above, unlike the conventional RFID method, queries to A-IoT devices (210a-210n) are determined by the core network, and therefore, when periodic read-type query operations are required, there is a problem that excessive signaling overhead may occur at the base station (220) or other readers.

[0011] To solve the problem described above, the present invention proposes a method for an ambient IoT device to transmit a signal in a wireless communication system and a device for the same.

[0012] The problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0013] In a first aspect of the present invention for solving the problem described above, a method performed by an ambient IoT device in a wireless communication system supporting ambient IoT (Internet of Things) is disclosed. In particular, the method is characterized by comprising: receiving a first paging message from a reader; transmitting a first message to the reader, which includes an energy indicator related to a shortage of available energy, when available energy for signal transmission is below a threshold; receiving a second paging message from the reader; and transmitting a third message to the reader, which includes a random ID (Random Identifier) ​​of the first message, when the second paging message includes a random ID (Random Identifier) ​​of the first message.

[0014] In addition, in a first aspect of the present invention, an ambient IoT device of a wireless communication system supporting ambient IoT (Internet of Things) is disclosed. The ambient IoT device comprises at least one processor; and at least one computer memory that can be operably connected to the at least one processor and stores instructions that cause the at least one processor to perform operations when executed, wherein the operations include: receiving a first paging message from a reader; transmitting a first message to the reader containing an energy indicator related to a shortage of available energy when available energy for signal transmission is below a threshold; receiving a second paging message from the reader; and transmitting a third message to the reader when the second paging message contains a random ID of the first message.

[0015] Additionally, in a first aspect of the present invention, a computer-readable storage medium is disclosed. The computer-readable storage medium stores at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for an ambient IoT device in a wireless communication system supporting an ambient IoT (Internet of Things), wherein the operations include: receiving a first paging message from a reader; transmitting a first message to the reader, which includes an energy indicator related to a shortage of available energy, when available energy for signal transmission is below a threshold; receiving a second paging message from the reader; and transmitting a third message to the reader, when the second paging message includes a random ID (Random Identifier) ​​of the first message.

[0016] Preferably, the third message is characterized by including the device ID of the ambient IoT device.

[0017] Preferably, the first paging message is characterized by including information instructing the execution of a CFRA (Contention Free Random Access) procedure.

[0018] Preferably, the second paging message is characterized by including information related to an access occasion for transmitting the third message.

[0019] In addition, the first message and the third message may be transmitted for the execution of a CBRA (Contention Based Random Access) procedure.

[0020] Preferably, the ambient IoT device is characterized by generating a 16-bit random ID (Random Identifier) ​​upon receiving the first paging message, and then generating the first message including the random ID and the energy indicator.

[0021] Preferably, when the available energy is below the threshold at the time of transmission of the third message, the third message is characterized by including the energy indicator associated with the lack of available energy.

[0022]

[0023] In addition, in a second aspect of the present invention, a method performed by a reader in a wireless communication system supporting Ambient IoT (Internet of Things) is proposed, the method comprising: transmitting a first paging message to an Ambient IoT device; receiving a first message from the Ambient IoT device in response to the first paging message, the first message including an energy indicator related to a shortage of available energy of the Ambient IoT device; storing a random identifier of the first message; transmitting a second paging message including the random identifier to the Ambient IoT device; and receiving a third message from the Ambient IoT device in response to the second paging message.

[0024] Additionally, in a second aspect of the present invention, a reader of a wireless communication system supporting Ambient IoT (Internet of Things) is disclosed. The reader comprises at least one processor; and at least one computer memory that may be operably connected to the at least one processor and stores instructions that, when executed, cause the at least one processor to perform operations, wherein the operations include: transmitting a first paging message to an Ambient IoT device; receiving a first message from the Ambient IoT device in response to the first paging message, the first message including an energy indicator related to a shortage of available energy of the Ambient IoT device; storing a random identifier of the first message; transmitting a second paging message to the Ambient IoT device including the random identifier; and receiving a third message from the Ambient IoT device in response to the second paging message.

[0025] Additionally, in a second aspect of the present invention, a computer-readable storage medium is disclosed. The computer-readable storage medium stores at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a reader in a wireless communication system supporting an Ambient IoT (Internet of Things), wherein the operations include: transmitting a first paging message to an Ambient IoT device; receiving a first message from the Ambient IoT device in response to the first paging message, the first message including an energy indicator related to a shortage of available energy of the Ambient IoT device; storing a random identifier of the first message; transmitting a second paging message to the Ambient IoT device including the random identifier; and receiving a third message from the Ambient IoT device in response to the second paging message.

[0026] Preferably, the third message is characterized by including the device ID of the ambient IoT device.

[0027] Preferably, the first paging message is characterized by including information instructing the execution of a CFRA (Contention Free Random Access) procedure.

[0028] In addition, the first message and the third message may be received for the performance of a CBRA (Contention Based Random Access) procedure.

[0029] Preferably, the second paging message is characterized by including information related to an access occasion for transmitting the third message.

[0030] Preferably, the third message is characterized by including the energy indicator associated with the shortage of available energy.

[0031] According to the embodiments of the present invention as described above, an A-IoT device can accurately notify a reader of a situation where signal transmission is impossible due to insufficient energy, and the reader can induce faster transmission by omitting a predetermined procedure when a signal is subsequently requested from the A-IoT device.

[0032] The effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0033] Figure 1 is a diagram briefly summarizing the requirements for IoT devices considered by 3GPP.

[0034] Figure 2 is a diagram illustrating an example of use in an automated warehouse as an example of the concept of an inventory use example among the use examples of A-IoT.

[0035] Figure 3 is a diagram illustrating scenarios for operating an A-IoT device.

[0036] FIGS. 4 and FIGS. 5 are drawings for explaining the configuration of an A-IoT device according to an embodiment of the present invention.

[0037] Figure 6 is a diagram illustrating a typical operation in which an A-IoT device transmits data.

[0038] FIG. 7 is a signal flow diagram illustrating a method in which an A-IoT device transmits a signal according to the present invention.

[0039] FIG. 8 illustrates a wireless device that can be applied to the present technology.

[0040] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0041] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0042]

[0043] FIG. 3 is a diagram illustrating scenarios for operating an A-IoT device. For convenience of explanation, the following description assumes that the 'reader' corresponds to a base station (220), but it is not limited to this.

[0044] Figure 3, 410, illustrates a topology 1 in which an A-IoT device (210a) is directly connected to a base station (220), and the A-IoT device (210a) responds to a query from the base station (220) to transmit data.

[0045] Meanwhile, 420 of FIG. 3 illustrates a topology 2 in which an A-IoT device (210b) is not directly connected to a base station (220) but transmits data to the base station (220) via an intermediate node (215).

[0046] The intermediate medium (215) may be a general portable user device (UE), such as a smartphone, that performs 5G communication or subsequent 6G communication. FIG. 3 illustrates a concept in which a general UE (215) is connected to a base station (220) via a Uu interface.

[0047] The UE as such an intermediate medium (215) may be connected to multiple A-IoT devices and transmit data from the A-IoT devices to the base station (220).

[0048] In relation to the description of FIG. 3, the base station (220) can generally be seen as performing the role of a reader that collects data from A-IoT devices (210a, 210b). However, depending on the case / use example, the UE (215) may perform the role of a reader that collects data from A-IoT devices (210a, 210b).

[0049] That is, the ‘reader’ is a device for obtaining data from an A-IoT device (210) to provide A-IoT services, and may be a base station (220) or an intermediate node (215) between the base station (220) and the A-IoT device (210).

[0050]

[0051] FIGS. 4 and FIGS. 5 are drawings for explaining the configuration of an A-IoT device according to an embodiment of the present invention.

[0052] A-IoT devices can have various types, and the A-IoT device types currently being discussed in 3GPP standardization are as follows.

[0053] Device Type 1: 1uW power consumption, supports energy storage and backscattering functions

[0054] Device Type 2a: 100 uW power consumption, energy storage, backscattering, supports DL and / or UL amplifiers

[0055] Device Type 2b: 100 uW power consumption, energy storage, active signal generation, supports DL and / or UL amplifiers

[0056] FIG. 4 illustrates a Type 1 device among the A-IoT device types described above as an example, and FIG. 5 illustrates a Type 2b device among the A-IoT device types described above as an example.

[0057] The A-IoT device illustrated in FIG. 4 may include a matching network (510), an RF energy harvester (520: harvester), a PMU (531: Power Management Unit), and an energy storage module (532) to support energy storage functions. Schematically, the RF energy harvester (520) extracts energy from a received RF signal and stores it in the energy storage module (532) to support the operation of a low-power consumption A-IoT device.

[0058] Meanwhile, for processing the signal received by DL, it may include an RF BPF (541: Band Pass Filter), an RF energy envelope detector (542), a BB LPF (543: BaseBand Low Pass Filter), a comparator / 1-bit ADC (552), and a clock generator (551).

[0059] Whether the frequency band of the DL signal of the A-IoT device will be used fixedly or variablely is currently under discussion, and accordingly, the RF BPF (541) in the structure of Fig. 4 is indicated by a dotted line.

[0060] Processing of the received DL signal and generation of the UL signal can be performed by BB logic (553) including a decoder, a controller, and an encoder, as shown in FIG. 4. The necessary information is stored by memory (560), and the stored information can be reused by BB logic (553).

[0061] The transmission of the UL signal of the A-IoT device can be transmitted through a backscatter modulator (570). A-IoT device having a simple transmission structure with low power can transmit the UL signal by backscattering the signal, and can perform line coding by adjusting the impedance to Z1 or Z2 as shown in FIG. 4.

[0062] Meanwhile, the A-IoT device of type 2b illustrated exemplarily in FIG. 5 may include a matching network (610), an RF energy harvester (620), a PMU (631), and an energy storage module (632) to support an energy storage function, similar to the type 1 device of FIG. 4.

[0063] In addition, for processing the signal received via DL, it includes an RF BPF (641: Band Pass Filter), a BB LPF (543: BaseBand Low Pass Filter), a comparator / 1-bit ADC (552), and a clock generator (551) in the same way as the Type 1 device, but the Type 2b device of FIG. 5 may include additional configurations such as an LNA (Low Noise Amplifier; 642) and an NB amplifier (643) for signal amplification.

[0064] Likewise, whether the frequency band of the DL signal of the A-IoT device will be used fixedly or variablely is currently under discussion, and accordingly, the RF BPF (641) and LNA (642) in the structure of Fig. 5 are indicated by dotted lines.

[0065] Processing of the received DL signal and generation of the UL signal can be performed by BB logic (653) including a decoder, a controller, and an encoder as shown in FIG. 5, and the necessary information is stored by memory (660), and the stored information can be reused by BB logic (653).

[0066] In addition, in the case of a Type 2b device, the UL signal transmission can be transmitted through a backscatter modulator (670), and unlike the Type 1 device of Fig. 4, the Type 2b device shown in Fig. 5 additionally includes a reflection amplifier (680) to amplify and transmit the signal.

[0067]

[0068] Based on these discussions, the present invention describes a method for an A-IoT device to transmit a signal.

[0069] Figure 6 is a diagram illustrating a typical operation in which an A-IoT device transmits data.

[0070] Referring to FIG. 6, the signal transmission operation of the A-IoT device may be initiated by the A-IoT device receiving an A-IoT paging message from a reader as in step S601. (Step A)

[0071] In A-IoT technology, the RA procedure can perform CFRA (Content Free RA) or CBRA (Content based RA). An A-IoT device can distinguish whether to perform CFRA or CBRA based on paging messages.

[0072] Upon receiving an A-IoT paging message, the A-IoT device performs an A-IoT RA (Random Access) procedure with the reader in step S602. Additionally, after the completion of the A-IoT RA procedure, the A-IoT device performs a D2R data transmission process, i.e., a signal transmission process, with the reader in step S603. (Step B)

[0073] If additional information transmission is required or for a specific reason, the A-IoT device and the reader may transmit and receive signals. That is, an R2D data transmission process such as step 604 and a D2R data transmission process such as step 605 are performed.

[0074] Meanwhile, in recent 3GPP standardization, it was decided that when an A-IoT device does not have enough energy to transmit a signal, that is, in a situation where energy is insufficient, a 1-bit energy indicator is provided to the reader.

[0075] However, the procedure for this is currently under discussion, and in the present invention, we intend to define the operation of CFRA (Contention-free RA) more specifically when a 1-bit energy indication is applied to indicate a situation where energy is insufficient.

[0076] Specifically, in order for a reader to receive a paging message from an A-IoT device, the reader must receive a request message for the A-IoT service from a server. In particular, the request message for the A-IoT service may be provided from the server to the reader in the form of an inventory or a command.

[0077] In particular, when the request message of the A-IoT service is provided in the form of an inventory, the operation is completed by performing Step A and Step B of Fig. 6. On the other hand, when the request message of the A-IoT service is provided in the form of a command, Step C can be performed in addition to Step A and Step B of Fig. 6.

[0078] In such cases, according to recent discussions, if the A-IoT device fails to charge sufficient energy, it transmits a 1-bit energy indicator to the reader to indicate that subsequent transmission or the next procedure cannot be performed.

[0079] The cases in which an A-IoT device can transmit an energy indicator are as follows.

[0080] (1) Case 1

[0081] An A-IoT device can transmit an energy indicator when transmitting a RAP (random access preamble) after receiving paging (i.e., when transmitting Msg1).

[0082] Specifically, if a 4-step RA procedure is performed, a 16-bit random number is generated and Msg1 is transmitted, and if a 2-step RA procedure is performed, Msg1 including the device ID is transmitted.

[0083] (2) Case 2

[0084] When an A-IoT device transmits Msg3 containing a device ID after transmitting Msg1 and receiving Msg2, it can transmit an energy indicator.

[0085] (3) Case 3

[0086] The A-IoT device can complete all A-IoT RA procedures and transmit an energy indicator upon response after receiving a command. However, this is limited to Step C of FIG. 6.

[0087]

[0088] In the present invention, the transmission efficiency is improved by minimizing unnecessary signaling between the reader and the A-IoT device in cases where a device ID is transmitted.

[0089] FIG. 7 is a signal flow diagram illustrating a method for an A-IoT device to transmit a signal according to the present invention. In particular, FIG. 7 assumes a case where an energy indicator is included in Msg1 during a 4-Step CFRA operation.

[0090] Referring to FIG. 7, in step S701, the server requests an A-IoT service from the reader in the form of an inventory or a command. Upon receiving this, the reader sends a paging message to the A-IoT device in step S702.

[0091] After receiving a paging message, the A-IoT device notifies the reader of its low energy by transmitting an energy indicator along with Msg1 in step S703 during the access occasion assigned to it. Specifically, during a 4-step CFRA operation, Msg1 includes a random ID determined by a 16-bit random number.

[0092] The reader that receives the Msg1 stores a random ID determined by a 16-bit random number of Msg1 in step S704 and transmits the inventory including the ID in the next paging message transmitted in step S705.

[0093] At this time, the A-IoT device also stores the random ID of Msg1 transmitted along with the energy indicator, and if the paging message of step S705 contains the corresponding random ID, it transmits the device ID through Msg3 (step S706).

[0094] In the case of the paging message transmitted in step S705, it may include random IDs of A-IoT devices whose RA procedure was interrupted in the transmission of Msg1 due to insufficient energy, and may induce the transmission of Msg3 without collision by allocating an access occasion for each random ID.

[0095] Finally, in step S706, the reader responds to the A-IoT service request by sending an inventory ACK or command ACK to the server.

[0096]

[0097] Additionally, consider the case where an energy indicator is passed along with Msg3 in a 4-step CFRA operation. This is a combination of an inventory-type request and a command-type request.

[0098] When an A-IoT device transmits an energy indicator to a reader to indicate low energy, along with a Msg3 containing a device ID during CFRA operation, the reader does not respond to the Msg3 and processes it as an Ack. Subsequently, it notifies A-IoT devices within coverage that the current access occasion has ended (Query Rep) and stores the corresponding device ID. The A-IoT device that sent the Msg3 is processed as having completed the response. The reader stores the corresponding device ID, combines the device ID with a command, and transmits it to the A-IoT device via a paging message; upon receiving the paging message, the A-IoT device skips the RA procedure and performs a response to the command. That is, referring to Fig. 6, according to the existing procedure, Step A and Step B must be performed before Step C can proceed, whereas according to the present invention, Step C is performed immediately.

[0099] Meanwhile, in the above-described embodiment, an indicator related to energy shortage was described in relation to the CFRA procedure, but it is not necessary to be limited thereto. In another embodiment of the present invention, the above-described indicator related to energy shortage may be transmitted and received through the CBRA procedure. That is, the UE may transmit an energy shortage indicator to the network through Msg1 and / or Msg3 of the CBRA.

[0100] FIG. 8 illustrates a wireless device that can be applied to the present technology.

[0101] Referring to FIG. 8, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, the first wireless device (100) and the second wireless device (200) can correspond to the A-IoT device (210) and reader (215, 220) of FIG. 3, respectively (in particular, a base station or an intermediate node).

[0102] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or flowcharts of operation disclosed herein. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). Memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (102) and memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE E-UTRA, 5G NR). A transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present invention, the wireless device may refer to a communication modem / circuit / chip.

[0103] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE E-UTRA, 5G NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be used in combination with an RF unit. In the present invention, the wireless device may refer to a communication modem / circuit / chip.

[0104] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document.

[0105] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be contained in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0106] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0107] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document through one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0108]

[0109] The detailed description of the preferred embodiments of the present invention disclosed above is provided to enable those skilled in the art to implement and practice the present invention. Although the present invention has been described with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the scope of the invention. For example, those skilled in the art may utilize each configuration described in the above embodiments in a manner that combines with one another.

[0110] Accordingly, the present invention is not intended to be limited to the embodiments shown herein, but to be given the broadest scope consistent with the principles and novel features disclosed herein.

[0111] The method and apparatus for dividing and transmitting data units by an ambient IoT device in a wireless communication system according to the embodiments of the present invention as described above are suitable for use in a 3GPP-based mobile communication environment, but as described above, they can also be widely used in communication methods other than 3GPP to efficiently operate intermediate nodes in an ambient IoT environment.

Claims

1. A method performed by an Ambient IoT device in a wireless communication system supporting Ambient IoT (Internet of Things), Receive a first paging message from a reader; If the available energy for signal transmission is below a threshold, a first message including an energy indicator related to the lack of available energy is transmitted to the reader; Receive a second paging message from the above reader; and If the second paging message includes a random ID (Random Identifier) ​​of the first message, the method comprises transmitting a third message to the reader. method.

2. In Paragraph 1, The third message above includes the device ID of the ambient IoT device, method.

3. In Paragraph 1, The above first paging message includes information instructing the execution of a CFRA (Contention Free Random Access) procedure, method.

4. In Paragraph 1, The above second paging message is, including information related to an access occasion for transmitting the above third message, method.

5. In Paragraph 1, The above-mentioned first message and the above-mentioned third message are transmitted for the execution of a CBRA (Contention Based Random Access) procedure, method.

6. In Paragraph 1, Upon receiving the first paging message, generate a random ID of size 16 bits; and additionally comprising generating the first message including the random ID and the energy indicator, method.

7. In Paragraph 1, If the available energy is below the threshold at the time of transmission of the third message, the third message includes the energy indicator related to the shortage of the available energy. method.

8. A method performed by a reader in a wireless communication system supporting Ambient IoT (Internet of Things), Sending a first paging message to an ambient IoT device; In response to the first paging message, a first message including an energy indicator related to a shortage of available energy of the ambient IoT device is received from the ambient IoT device; Store the random ID (Random Identifier) ​​of the first message above; Transmitting a second paging message including the above random ID to the ambient IoT device; and In response to the second paging message, receiving a third message from the ambient IoT device, method.

9. In Paragraph 8, The third message above includes the device ID of the ambient IoT device, method.

10. In Paragraph 8, The above first paging message includes information instructing the execution of a CFRA (Contention Free Random Access) procedure, method.

11. In Paragraph 8, The above-mentioned first message and the above-mentioned third message are received for the execution of a CBRA (Contention Based Random Access) procedure, method.

12. In Paragraph 8, The above second paging message is, including information related to an access occasion for transmitting the above third message, method.

13. In Paragraph 8, The third message above includes the energy indicator related to the shortage of available energy, method.

14. As an Ambient IoT device of a wireless communication system supporting Ambient IoT (Internet of Things) At least one processor; and It includes at least one computer memory that can be operably connected to the at least one processor and stores instructions that cause the at least one processor to perform operations when executed, and said operations are, Receive a first paging message from a reader; If the available energy for signal transmission is below a threshold, a first message including an energy indicator related to the lack of available energy is transmitted to the reader; Receive a second paging message from the above reader; and If the second paging message includes a random ID (Random Identifier) ​​of the first message, the method comprises transmitting a third message to the reader. Ambient IoT device.

15. As a reader of a wireless communication system supporting Ambient IoT (Internet of Things) At least one processor; and It includes at least one computer memory that can be operably connected to the at least one processor and stores instructions that cause the at least one processor to perform operations when executed, and said operations are, Sending a first paging message to an ambient IoT device; In response to the first paging message, a first message including an energy indicator related to a shortage of available energy of the ambient IoT device is received from the ambient IoT device; Store the random ID (Random Identifier) ​​of the first message above; Transmitting a second paging message including the above random ID to the ambient IoT device; and In response to the second paging message, receiving a third message from the ambient IoT device, reader.

16. A computer-readable storage medium, wherein the computer-readable storage medium stores at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for an ambient IoT device in a wireless communication system supporting an ambient IoT (Internet of Things), said operations are: Receive a first paging message from a reader; If the available energy for signal transmission is below a threshold, a first message including an energy indicator related to the lack of available energy is transmitted to the reader; Receive a second paging message from the above reader; and If the second paging message includes a random ID (Random Identifier) ​​of the first message, the method comprises transmitting a third message to the reader. Computer-readable storage media.

17. A computer-readable storage medium, wherein the computer-readable storage medium stores at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a reader in a wireless communication system supporting an Ambient IoT (Internet of Things), said operations are: Sending a first paging message to an ambient IoT device; In response to the first paging message, a first message including an energy indicator related to a shortage of available energy of the ambient IoT device is received from the ambient IoT device; Store the random ID (Random Identifier) ​​of the first message above; Transmitting a second paging message including the above random ID to the ambient IoT device; and In response to the second paging message, receiving a third message from the ambient IoT device, Computer-readable storage media.

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