Method and apparatus for supporting device operation according to parallel service request in ambient IoT system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by an ambient Internet of Things (AIoT) device, according to an embodiment of the present disclosure, comprises the steps of: receiving, from a first reader, a first AIoT paging message; starting a random access procedure with the first reader on the basis of the first AIoT paging message; receiving a second AIoT paging message from a second reader; and if a condition based on the first AIoT paging message and the second AIoT paging message is satisfied, continuously performing the random access procedure with the first reader based on the first AIoT paging message.

Description

Method and device for supporting device operation according to parallel service requests in an ambient IoT system

[0001] The present disclosure relates to the operation of a terminal and a base station in a communication system. More specifically, the present disclosure relates to a method and apparatus for supporting device operation in response to a parallel service request in an Ambient IoT system.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in frequency bands below 6 GHz ('Sub 6 GHz'), such as 3.5 gigahertz (3.5 GHz), but also in ultra-high frequency bands called millimeter waves (mmWave), such as 28 GHz and 39 GHz ('Above 6 GHz'). In addition, for 6G mobile communication technology, which is referred to as a system beyond 5G, implementation in the terahertz band (e.g., the 3 terahertz (3 THz) band at 95 GHz) is being considered to achieve transmission speeds 50 times faster and ultra-low latency reduced to one-tenth compared to 5G mobile communication technology.

[0003] In the early stages of 5G mobile communication technology, aiming to satisfy service support and performance requirements for enhanced Mobile BroadBand (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), technologies such as beamforming and Massive MIMO to mitigate path loss and increase transmission distance in ultra-high frequency bands, support for various numerologies (such as the operation of multiple subcarrier spacing) and dynamic operation of slot formats for the efficient utilization of ultra-high frequency resources, initial access techniques to support multi-beam transmission and broadband, definition and operation of Band-Width Parts (BWP), Low Density Parity Check (LDPC) codes for high-volume data transmission, new channel coding methods such as Polar Codes for the reliable transmission of control information, and L2 pre-processing (L2 Standardization has been carried out for pre-processing, network slicing which provides a dedicated network specialized for specific services, and other methods.

[0004] Currently, discussions are underway to improve and enhance the performance of the initial 5G mobile communication technology, taking into account the services that the 5G mobile communication technology was intended to support. Additionally, standardization of the physical layer is in progress for technologies such as V2X (Vehicle-to-Everything), which helps autonomous vehicles make driving decisions and enhance user convenience based on their own location and status information transmitted by the vehicle; NR-U (New Radio Unlicensed), which aims for system operation in unlicensed bands that meets various regulatory requirements; NR terminal low power consumption technology (UE Power Saving); Non-Terrestrial Network (NTN), which is direct terminal-satellite communication for securing coverage in areas where communication with the terrestrial network is impossible; and positioning.

[0005] In addition, standardization is underway in the field of wireless interface architecture / protocols for technologies such as the Industrial Internet of Things (IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) which provides nodes to expand network service areas by integrating wireless backhaul links and access links, Mobility Enhancement including Conditional Handover and Dual Active Protocol Stack (DAPS) Handover, and 2-step Random Access (2-step RACH for NR) which simplifies random access procedures. Standardization is also underway in the field of system architecture / services for 5G baseline architectures (e.g., Service based Architecture, Service based Interface) to incorporate Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC), which provides services based on the location of the terminal.

[0006] When such 5G mobile communication systems are commercialized, connected devices, which are increasing explosively, will be connected to communication networks. Accordingly, it is expected that there will be a need to enhance the functionality and performance of 5G mobile communication systems and to integrate the operation of connected devices. To this end, new research is planned to be conducted on 5G performance improvement and complexity reduction, support for AI services, support for metaverse services, and drone communication using eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] Furthermore, the advancement of these 5G mobile communication systems encompasses multi-antenna transmission technologies such as new waveforms, Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas to guarantee coverage in the terahertz band of 6G mobile communication technology; metamaterial-based lenses and antennas; high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM); and Reconfigurable Intelligent Surface (RIS) technology to improve terahertz band signal coverage; as well as full-duplex technology for enhancing frequency efficiency and system networks in 6G mobile communication technology; AI-based communication technologies that realize system optimization by utilizing satellites and Artificial Intelligence (AI) from the design stage and internalizing end-to-end AI support functions; and the realization of services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources. It could serve as a foundation for the development of next-generation distributed computing technologies.

[0008] Based on the discussion described above, the present disclosure provides an apparatus and method capable of effectively providing services in a next-generation wireless communication system.

[0009] More specifically, the present disclosure proposes a method for determining which AIoT Paging message to prioritize when an AIoT device receives a plurality of AIoT Paging messages (receives a Parallel Service Request).

[0010] The technical problems to be solved in the embodiments of the present disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0011] The present disclosure, for solving these problems, proposes a method performed by an Ambient Internet of Things (AIoT) device in a wireless communication system. More specifically, the method is characterized by: receiving a first AIoT Paging message from a first Reader; initiating a random access procedure with the first Reader based on the first AIoT Paging message; receiving a second AIoT Paging message from a second Reader; and, if conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, continuing to perform a random access procedure with the first Reader based on the first AIoT Paging message.

[0012] The present disclosure, for solving these problems, proposes a method performed by a first reader in a wireless communication system. More specifically, the method comprises the steps of: transmitting a first AIoT Paging message to an Ambient Internet of Things (AIoT) device; and, if conditions based on the first AIoT Paging message and a second AIoT Paging message are satisfied, continuing a random access procedure with the AIoT device based on the first AIoT Paging message, wherein the second AIoT Paging message is transmitted to the AIoT from a second reader.

[0013] The present disclosure, for solving these problems, proposes an Ambient Internet of Things (AIoT) device in a wireless communication system. More specifically, the AIoT device comprises: at least one transceiver; at least one processor connected to communicate with the at least one transceiver; and a memory connected to communicate with the at least one processor and capable of executing the at least one processor individually or in any combination thereof, wherein the AIoT device receives a first AIoT Paging message from a first Reader and initiates a random access procedure with the first Reader based on the first AIoT Paging message, receives a second AIoT Paging message from a second Reader, and, if conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, stores instructions to continue performing a random access procedure with the first Reader based on the first AIoT Paging message.

[0014] The present disclosure, for solving these problems, proposes a first Reader in a wireless communication system. More specifically, the first Reader comprises: at least one transceiver; at least one processor connected to communicate with the at least one transceiver; and a memory connected to communicate with the at least one processor and executable individually or in any combination of the at least one processor, which stores instructions for the first Reader to transmit a first AIoT Paging message to an Ambient Internet of Things (AIoT) device and, when conditions based on the first AIoT Paging message and a second AIoT Paging message are satisfied, to continue performing a random access procedure with the AIoT device based on the first AIoT Paging message, wherein the second AIoT Paging message is transmitted from the second Reader to the AIoT.

[0015] The present disclosure provides an apparatus and method capable of effectively providing services in a next-generation wireless communication system.

[0016] According to one embodiment of the present disclosure, an AIoT terminal can efficiently perform communication with a Reader (or random access procedure) by determining which AIoT Paging message to prioritize when receiving a plurality of AIoT Paging messages (receiving Parallel Service Requests).

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

[0018] FIG. 1a is a drawing illustrating the structure of a next-generation mobile communication system according to one embodiment of the present disclosure.

[0019] FIG. 1b is a diagram showing the wireless protocol structure of a next-generation mobile communication system according to one embodiment of the present disclosure.

[0020] FIG. 1c is a diagram illustrating a topology and deployment scenario in which ambient IoT (Internet of Things) communication is supported in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0021] FIG. 1d is a diagram illustrating a use case in which Ambient IoT (Internet of Things) communication is applied in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0022] FIG. 1e is a diagram illustrating a procedure for inventorying Ambient IoT (Internet of Things) devices in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0023] FIG. 1f is a diagram illustrating a procedure for inventorying Ambient IoT (Internet of Things) devices in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0024] FIG. 1g is a block diagram illustrating the internal structure of a terminal according to one embodiment of the present disclosure.

[0025] FIG. 1h is a block diagram showing the configuration of an NR base station according to one embodiment of the present disclosure.

[0026] The operating principle of the present invention will be described in detail below with reference to the attached drawings. In describing the present invention below, specific descriptions of related known functions or configurations will be omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, their definitions should be based on the content throughout this specification.

[0027] In the following description of the present invention, specific descriptions of related known functions or configurations will be omitted if it is determined that such detailed descriptions may unnecessarily obscure the essence of the invention. Embodiments of the present invention will be described below with reference to the attached drawings.

[0028] Terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, terms referring to various identification information, etc., are examples provided for the convenience of explanation. Accordingly, the present invention is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used.

[0029] For convenience of explanation, the present invention uses terms and names defined in the 3GPP LTE (3rd Generation Partnership Project Long Term Evolution) standard. However, the present invention is not limited by the above terms and names and can be applied equally to systems conforming to other standards. In the present invention, eNB may be used interchangeably with gNB for convenience of explanation. That is, a base station described as eNB may represent a gNB.

[0030] FIG. 1a is a drawing illustrating the structure of a next-generation mobile communication system according to one embodiment of the present disclosure.

[0031] Referring to FIG. 1a, as illustrated, the wireless access network of a next-generation mobile communication system (hereinafter NR or 5G) consists of a next-generation base station (New Radio Node B, hereinafter NR gNB or NR base station) (1a-10) and an NR CN (1a-05, New Radio Core Network). A user terminal (New Radio User Equipment, hereinafter NR UE or terminal) (1a-15) can connect to an external network through the NR gNB (1a-10) and the NR CN (1a-05).

[0032] In FIG. 1a, the NR gNB (1a-10) can correspond to the eNB (Evolved Node B) of the existing LTE system. The NR gNB is connected to the NR UE (1a-15) via a wireless channel and can provide superior service compared to the existing Node B. In next-generation mobile communication systems, since all user traffic is serviced through a shared channel, a device is required to collect state information such as the buffer status, available transmission power status, and channel status of the UEs to perform scheduling, and this is handled by the NR NB (1a-10). A single NR gNB can typically control multiple cells. To achieve ultra-high-speed data transmission compared to current LTE, it can have a maximum bandwidth greater than the existing maximum bandwidth, and beamforming technology can be additionally incorporated by using Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) as the wireless access technology. In addition, an Adaptive Modulation & Coding (AMC) method is applied to determine the modulation scheme and channel coding rate according to the channel conditions of the terminal. The NR CN (1a-05) performs functions such as mobility support, bearer configuration, and QoS configuration. The NR CN is a device responsible for various control functions as well as mobility management functions for the terminal, and is connected to multiple base stations. Furthermore, the next-generation mobile communication system can be interoperable with existing LTE systems, and the NR CN is connected to the MME (1a-25) via a network interface. The MME is connected to the existing base station eNB (1a-30).

[0033] FIG. 1b is a diagram showing the wireless protocol structure of a next-generation mobile communication system according to one embodiment of the present disclosure.

[0034] Referring to Fig. 1b, the wireless protocol of the next-generation mobile communication system consists of the New Radio (NR) Service Data Adaptation Protocol (SDAP) (1b-01, 1b-45), NR Packet Data Convergence Protocol (PDCP) (1b-05, 1b-40), NR Radio Link Control (RLC) (1b-10, 1b-35), and NR Medium Access Control (MAC) (1b-15, 1b-30) at the terminal and the NR base station, respectively.

[0035] The main functions of NR SDAP (1b-01, 1b-45) may include some of the following functions.

[0036] - User data transfer function (transfer of user plane data)

[0037] - Mapping function between a QoS flow and a DRB for both DL and UL for uplink and downlink

[0038] - Marking QoS flow ID in both DL and UL packets for uplink and downlink

[0039] - Function to map reflective QoS flow to data bearers for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

[0040] Regarding the SDAP layer device, the terminal may receive a setting via an RRC message indicating whether to use the header of the SDAP layer device or the functions of the SDAP layer device for each PDCP layer device, bearer, or logical channel. If the SDAP header is configured, the terminal may be instructed to update or reset the mapping information for the QoS flow of the uplink and downlink and the data bearer using the NAS reflective QoS and AS reflective QoS 1-bit indicators of the SDAP header. The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used for data processing priority, scheduling information, etc., to support smooth service.

[0041] The main functions of NR PDCP (1b-05, 1b-40) may include some of the following functions.

[0042] - Header compression and decompression features (ROHC only)

[0043] - User data transfer function (Transfer of user data)

[0044] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0045] - Out-of-sequence delivery of upper layer PDUs

[0046] - Reordering function (PDCP PDU reordering for reception)

[0047] - Duplicate detection function (Duplicate detection of lower layer SDUs)

[0048] - Retransmission of PDCP SDUs

[0049] - Encryption and decryption functions (Ciphering and deciphering)

[0050] - Timer-based SDU discard in uplink.

[0051] In the above, the reordering function of the NR PDCP device refers to a function of reordering PDCP PDUs received from a lower layer in order based on the PDCP SN (sequence number), and may include a function of transmitting data to an upper layer in the reordered order, or a function of transmitting immediately without considering the order, may include a function of recording lost PDCP PDUs by reordering, may include a function of reporting the status of lost PDCP PDUs to the transmitting side, and may include a function of requesting retransmission of lost PDCP PDUs.

[0052] The main functions of NR RLC(1b-10, 1b-35) may include some of the following functions.

[0053] - Data transfer function (Transfer of upper layer PDUs)

[0054] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0055] - Out-of-sequence delivery of upper layer PDUs

[0056] - ARQ function (Error Correction through ARQ)

[0057] - Concatenation, segmentation, and reassembly functions of RLC SDUs

[0058] - Re-segmentation function (Re-segmentation of RLC data PDUs)

[0059] - Reordering function (Reordering of RLC data PDUs)

[0060] - Duplicate detection

[0061] - Error detection function (Protocol error detection)

[0062] - RLC SDU discard function

[0063] RLC re-establishment function

[0064] In the above, the in-sequence delivery function of the NR RLC device refers to the function of delivering RLC SDUs received from a lower layer to an upper layer in sequence; it may include a function to reassemble and deliver them if a single RLC SDU is received divided into multiple RLC SDUs; it may include a function to rearrange received RLC PDUs based on an RLC SN (sequence number) or PDCP SN (sequence number); it may include a function to record lost RLC PDUs after rearranging the order; it may include a function to report the status of lost RLC PDUs to the transmitting side; it may include a function to request retransmission of lost RLC PDUs; if there are lost RLC SDUs, it may include a function to deliver only the RLC SDUs prior to the lost RLC SDU to the upper layer in sequence; or if a predetermined timer has expired even if there are lost RLC SDUs, it may include a function to deliver all RLC SDUs received before the timer started to the upper layer in sequence; or It may include a function that delivers all RLC SDUs received up to the present to the upper layer in order once a predetermined timer has expired, even if there are lost RLC SDUs. Additionally, the RLC PDUs mentioned above may be processed in the order they are received (regardless of the order of sequence numbers, but in the order of arrival) and delivered to the PDCP device out of order (out-of-sequence delivery). In the case of segments, segments stored in a buffer or to be received later may be received, reconstructed into a single complete RLC PDU, processed, and then delivered to the PDCP device.The above NR RLC layer may not include a concatenation function, and the function may be performed in the NR MAC layer or replaced with the multiplexing function of the NR MAC layer.

[0065] In the above, the out-of-sequence delivery function of the NR RLC device refers to the function of delivering RLC SDUs received from a lower layer directly to an upper layer regardless of order. It may include a function of reassembling and delivering RLC SDUs when a single RLC SDU is received divided into multiple RLC SDUs, and may include a function of storing the RLC SN or PDCP SN of the received RLC PDUs and sorting the order to record the lost RLC PDUs.

[0066] The NR MAC (1b-15, 1b-30) can be connected to multiple NR RLC layer devices configured in a terminal, and the main functions of the NR MAC may include some of the following functions.

[0067] - Mapping function (Mapping between logical channels and transport channels)

[0068] - Multiplexing and demultiplexing functions (Multiplexing / demultiplexing of MAC SDUs)

[0069] - Scheduling information reporting function

[0070] - HARQ function (Error correction through HARQ)

[0071] - Priority handling between logical channels of one UE

[0072] - Priority handling between UEs by means of dynamic scheduling

[0073] - MBMS service identification function

[0074] - Transport format selection function

[0075] - Padding

[0076] The NR PHY layer (1b-20, 1b-25) can perform the operation of channel coding and modulating upper layer data, creating OFDM symbols and transmitting them to the wireless channel, or demodulating OFDM symbols received through the wireless channel and channel decoding them to transmit them to the upper layer.

[0077] FIG. 1c is a diagram illustrating a topology and deployment scenario in which ambient IoT (Internet of Things) communication is supported in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0078] An Ambient IoT device (1c-01) according to the present disclosure is a device with very low maximum power consumption, capable of supporting a maximum peak power consumption of 1 uW or a peak power consumption of several hundred uW. The device can perform uplink transmission through backscattering. That is, the device can perform uplink transmission using an external carrier wave. When performing uplink transmission, the device may or may not perform amplification. Of course, the device may also generate uplink transmission internally. The device does not have an RRC state and does not support mobility such as cell selection or cell reselection. Furthermore, the device is a low-spec device that does not support Hybrid Automatic Repeat and Request (HARQ) and Automatic Repeat Request (ARQ).

[0079] An Ambient IoT device (1c-01) may mean a device that uses energy harvesting to generate power and may have no battery or have a limited energy storage capacity.

[0080] An Ambient IoT device (1c-01) can perform direct bidirectional communication with a base station or a reader (1c-05). That is, the Ambient IoT device (1c-01) can transmit and receive Ambient IoT data and / or signaling (1c-20) with the base station or reader (1c-05). For reference, the Ambient IoT device (1c-01) can transmit Ambient IoT data and / or signaling (1c-20) to the base station or reader (1c-05) and receive Ambient IoT data and / or signaling (1c-30) to another base station or reader (1c-10). Of course, the above Ambient IoT device (1c-01) can receive Ambient IoT data and / or signaling (1c-20) from the base station or reader (1c-05) and transmit Ambient IoT data and / or signaling (1c-30) to another base station or reader (1c-10).

[0081] The above Ambient IoT device (1c-01) may be located indoors, and the above base station (1c-05, 1c-10) may also be located indoors. The communication may not be supported through the Uu interface between the conventional terminal and the base station, but may be supported through a new interface. In the present disclosure, the new interface may be referred to as the Ax interface.

[0082] FIG. 1d is a diagram illustrating a use case in which Ambient IoT (Internet of Things) communication is applied in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0083] Referring to FIG. 1d, a service may be provided to a specific Ambient IoT device (1d-10), a service may be provided to a group of Ambient IoT devices consisting of two or more Ambient IoT devices (1d-05), or a service may be provided to all Ambient IoT devices (1d-01).

[0084] 1d-01 is a diagram illustrating a scenario for an automated warehouse inventory. In this scenario, various warehousing information may be generated for the transfer of goods, storage of goods, and inventory of goods. Specifically, this scenario may consist of five steps.

[0085] Step 1: Verification and unloading of goods

[0086] Step 2: Move items into the gate (gate-in inventory)

[0087] Step 3: Inventory Management

[0088] Step 4: Move items out of the gate (gate-out inventory)

[0089] Step 5: Check and Loading

[0090] In the above scenario, Ambient IoT devices can be attached to each item for automated warehouse inventory, and warehouse inventory can be managed efficiently by performing an inventory procedure on all Ambient IoT devices and executing a command procedure, which is a procedure to write and read the characteristics of each item.

[0091] 1d-05 is a diagram illustrating a scenario for sensing the surrounding environment through an Ambient IoT device. In this scenario, when planting orchids, an Ambient IoT device is attached to the plant to monitor the plant's surrounding environment and provide the generated monitoring information to authorized users and third parties. In the above scenario, plants can be managed efficiently by performing an inventory procedure on Ambient IoT devices attached to multiple plants (i.e., a group of Ambient IoT devices) and a command procedure, which is a procedure to activate or deactivate each Ambient IoT device.

[0092] 1d-10 is a diagram illustrating a scenario for managing the health of the elderly through an Ambient IoT device. In this scenario, the health status of the elderly with heart disease or chronic diseases can be continuously monitored, and the generated monitoring information can be periodically provided to an authorized user (e.g., a doctor). In the above scenario, the health status of the elderly can be managed efficiently by performing an inventory procedure on a single Ambient IoT device attached to a specific elderly person, and then performing a command procedure, which is a procedure for reading necessary information from the Ambient IoT device.

[0093] FIG. 1e is a diagram illustrating a procedure for inventorying Ambient IoT (Internet of Things) devices in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0094] Referring to FIG. 1e, in steps 1e-10 and / or 1e-15, a Core Network (hereinafter CN (1e-04)) may transmit a predetermined message to a predetermined Reader (1e-02, 1e-03) to provide and / or request AIoT services. The predetermined message may include an Inventory request message. The CN (1e-04) may refer to an Access and Mobility Management Function (AMF) for supporting AIoT communication, a new Core Network function (AIoT function, hereinafter AIoTF) that supports AIoT communication, or a new entity within the (new) Core Network. The Reader (1e-02, 1e-03) may refer to a Base Station (hereinafter BS) or User Equipment (hereinafter UE) that supports AIoT communication. The predetermined message may include at least one of the following information.

[0095] - Information About AIoT services

[0096] ■ The above information may refer to information regarding which service type, Inventory or Command, is represented.

[0097] - CN correlation ID

[0098] ■ The above CN correlation ID may refer to an identifier representing information about a specific AIoT service ID.

[0099] - Information used for AIoT reader selection

[0100] ■ The above information may refer to one or more terminal Reader identifiers or target area information.

[0101] - Information about the target AIoT device(s)

[0102] ■ The above information may refer to information capable of identifying a specific AIoT device, identifying a group of multiple AIoT devices, or identifying all AIoT devices. For example, the above information may include a specific AIoT device ID to identify a specific AIoT device, or filtering information that can be used in association with multiple AIoT devices to identify multiple AIoT devices, and / or an AIoT device ID or group AIoT device ID capable of identifying each AIoT device. The above information may be empty to indicate identification of all AIoT devices, or the above information may include an indicator to indicate this.

[0103] - Information to be used for resource allocation

[0104] ■ Approximate number of AIoT devices and / or approximate D2R (Device-to-Reader) message size

[0105] For reference, steps 1e-10 and 1e-15 may be performed simultaneously.

[0106] In step 1e-20, Reader (1e-03) may send a predetermined message to CN (1e-04) in response to step 1e-10. The predetermined message may include an Inventory response message.

[0107] In step 1e-25, Reader (1e-02) may send a predetermined message to CN (1e-04) in response to step 1e-15. The predetermined message may include an Inventory response message.

[0108] Step 1e-25 may be performed simultaneously with Step 1e-20.

[0109] In step 1e-30, the Reader (1e-02) can transmit an AIoT Paging message based on the message received in step 1e-15. The message may be transmitted as a broadcast. The message may include at least one of the following information.

[0110] - Information about target AIoT device(s)

[0111] ■ The above information may refer to the information described in step 1e-15. For example, it may refer to one AIoT device identifier (or a Temporary AIoT device ID mapped thereto) or one-group AIoT device identifier and / or filtering criteria (or a Temporary AIoT group device ID mapped thereto) and / or filtering criteria. The AIoT device ID cannot be decoded at the MAC layer of the AIoT device and is visible only at the upper layer of the AIoT device (e.g., the NAS layer). That is, the above information may be transparent to the MAC layer of the AIoT device. Of course, it may be decoded at the MAC layer of the AIoT device.

[0112] ■ The above information may be empty to instruct to identify all AIoT devices. Alternatively, a separate indicator to instruct to identify all AIoT devices may be included in the above information. The information to identify all AIoT devices may be visible at the MAC layer of the AIoT device, or it may be transparent to the AIoT device MAC layer as described above.

[0113] - Resource configuration information for target AIoT device(s) to send Message 1 (Msg 1)

[0114] ■ Resource configuration information for transmitting Message 1 via Frequency Division Multiple Access

[0115] ◆ Frequency shift and / or frequency channel resource information that enables Msg 1 to be transmitted on a specific frequency channel or bandwidth. For example, an AIoT device that receives frequency shift information to be used when transmitting Msg 1 can determine one frequency shift value randomly from the corresponding configuration information and transmit Msg 1 on the corresponding frequency channel or bandwidth.

[0116] ■ Resource configuration information for transmitting Message 1 via Time Frequency Multiple Access

[0117] ◆ Resource setting information that enables the transmission of Msg 1 at a specific time. For example, an AIoT device that receives time setting information that enables the transmission of Msg 1 can determine the time for transmitting Msg 1 by randomly selecting one time from the setting information.

[0118] - Transaction ID

[0119] ■ An ID generated from the CN correlation ID received from CN(1e-05), which can be composed of fewer bit values ​​than the CN correlation ID.

[0120] - Indicators or information indicating whether the inventory procedure should be performed using contention-based random access or contention-free random access.

[0121] ■ If information for only one AIoT device is included in AIoT paging, or if only one Msg1 resource is included (for one AIoT device), the AIoT device can perform the inventory procedure via contention-free random access. Of course, this can also be indicated through a separate directive.

[0122] ■ If information regarding at least two AIoT devices is included in the AIoT paging (for example, if information about a group of devices consisting of two or more AIoT devices is included, or if information is included instructing all AIoT devices to perform an inventory procedure), the relevant AIoT devices may perform the inventory procedure via contention-based random access. Of course, this can also be instructed through a separate indicator.

[0123] In step 1e-35, the AIoT device (1e-01) can determine whether there is information in the AIoT paging received through step 1e-30 that directs the AIoT device (1e-01). That is, the MAC layer device of the AIoT device can forward information about the target AIoT device(s) contained in the AIoT paging to the upper layer (e.g., NAS layer) of the AIoT device.

[0124] The upper layer of the AIoT device may determine that the AIoT device (1e-01) must perform an inventory procedure if it contains a paging identifier indicating the AIoT device (1e-01), or a group paging identifier and / or filtering criteria to which the AIoT device (1e-01) belongs, or if it contains information indicating that all AIoT devices must perform an inventory procedure (e.g., an indicator indicating this or information about the target AIoT device(s) is empty). For reference, if the information about the target AIoT device(s) can be decoded by the MAC layer of the AIoT device, the MAC layer of the AIoT device may notify the upper layer of the AIoT device that an inventory procedure must be performed, or may notify it when necessary (e.g., when receiving necessary information from the upper layer of the AIoT device (e.g., when message 3 needs to be transmitted). At this time, the information about the target AIoT device(s) may include information indicating that all AIoT devices must perform an inventory procedure.

[0125] In step 1e-40, the AIoT device (1e-01) triggered to perform the inventory procedure may initiate a random access procedure (contention-based random access or contention-free random access) according to the AIoT paging received in step 1e-30.

[0126] In step 1e-45, the Reader (1e-03) may transmit an AIoT Paging message based on the message received in step 1e-10. The message is transmitted via broadcast, and the information included in the message may follow step 1e-30. Note that the information included in the message may differ from that in step 1e-30. For example, the determination of resource configuration information for the target AIoT device(s) to transmit message 1 (Msg 1) and / or whether the target AIoT device(s) will perform an inventory procedure using contention-based random access or contention-free random access is the Reader implementation.

[0127] In step 1e-50, the AIoT device (1e-01) that initiated the random access procedure in step 1e-40 may ignore the AIoT paging received in step 1e-45. For example,

[0128] - The above AIoT device can continue to perform the random access procedure initiated in step 1e-40 without separately processing the AIoT paging received in step 1e-45. This has the advantage of reducing the complexity of implementing the AIoT device by always prioritizing the service already in progress.

[0129] - If there is information in the AIoT paging received in step 1e-45 indicating an AIoT device (1e-01),

[0130] ■ If the transaction ID received in the AIoT paging at step 1e-30 and the transaction ID received in the AIoT paging at step 1e-45 are the same (for example, when the inventory procedure is triggered by the same service), the above AIoT device may ignore the AIoT paging received at step 1e-45 and continue to perform the random access procedure initiated at step 1e-40. Since the paging was performed by the same service regardless of which Reader the random access procedure is performed with, there is an advantage in reducing implementation complexity by prioritizing the paging received first. Of course, even if the transaction IDs are different, the above AIoT device may ignore the AIoT paging received at step 1e-45 and continue to perform the random access procedure initiated at step 1e-40. This is because the purpose of requesting the inventory procedure is ultimately the same even if the transaction IDs are different.

[0131] ■ If the signal received at step 1e-30 is better than or equal to the signal received at step 1e-45, the above AIoT device may ignore the AIoT Paging received at step 1e-45 and continue to perform the random access procedure initiated at step 1e-40. This has the advantage of increasing the probability of success of the random access procedure.

[0132] ■ If the time at which message 1 (Msg1) is transmitted is earlier than or the same as step 1e-30 than step 1e-45, the AIoT device may ignore the AIoT Paging received at step 1e-45 and continue the random access procedure initiated at step 1e-40. This has the advantage of being able to complete the random access procedure faster.

[0133] ■ If an AIoT device (1e-01) triggered to contention-free random access through step 1e-30 determines that it must transmit Msg1 via contention-based random access in step 1e-45, the AIoT device may ignore the AIoT paging received in step 1e-45 and continue the random access procedure initiated in step 1e-40. This has the advantage of enabling the random access procedure to succeed quickly.

[0134] For reference, steps 1e-45 and 1e-50 may apply identically after step 1e-55, after step 1e-60, after step 1e-65, and after step 1e-70. For example,

[0135] - The AIoT device (1e-01) that receives a message instructing the timing of the Msg1 resource through step 1e-55 can ignore the AIoT paging broadcast by the Reader (1e-03) and continue the ongoing random access procedure.

[0136] - The AIoT device (1e-01) that transmitted Msg1 through step 1e-60 can ignore the AIoT paging broadcast by the Reader (1e-03) and continue the ongoing random access procedure.

[0137] - The AIoT device (1e-01) that received Msg2 through step 1e-65 can ignore the AIoT paging broadcast by the Reader (1e-03) and continue the ongoing random access procedure.

[0138] - The AIoT device (1e-01) that has successfully performed contention resolution through step 1e-70 can ignore the AIoT paging broadcast by the Reader (1e-03) and continue the ongoing random access procedure.

[0139] - The AIoT device (1e-01) that transmitted Msg3 through step 1e-75 can ignore the AIoT paging broadcast by the Reader (1e-03) and continue the ongoing random access procedure.

[0140] In step 1e-55, the AIoT device (1e-01) may receive an R2D message from the Reader (1e-02) that can determine the resource for transmitting Msg1. The R2D message may include an AIoT paging or new R2D message (e.g., a QueryRep-like message) that does not contain information about the target AIoT device(s).

[0141] In step 1e-60, the AIoT device (1e-01) can transmit Msg1. Specifically,

[0142] - An AIoT device that triggers contention-based random access can transmit Msg1 containing a randomly generated 16-bit value composed of specific bits (e.g., 16 bits).

[0143] - An AIoT device with contention-free random access triggered can transmit Msg1 containing a (Temporary) device ID that can identify the AIoT device.

[0144] In step 1e-62, the Reader (1e-02) that receives Msg1 containing the (Temporary) device ID may send an Inventory report message containing the (Temporary) device ID to the CN (1e-04). The A-IoT device (1e-01) may store in memory that the inventory procedure or random access procedure was successfully performed if it does not receive NACK information (e.g., an R2D message indicating a NACK containing the device ID) indicating that it did not receive Msg1 from the Reader (1e-02), or if it does not receive NACK information indicating that it did not receive Msg1, or if it does not receive NACK information indicating that it did not receive Msg1. This is to prevent the random access procedure from being performed redundantly in response to AIoT paging coming from the Reader (1e-02) in the future.

[0145] In step 1e-65, the Reader (1e-02) that receives Msg1 containing a random number value composed of 16 bits can transmit Msg2. That is, the Reader (1e-02) can transmit Msg2 by including the same value contained in Msg1 in Msg2. Of course, the Reader (1e-02) can also transmit Msg2 that includes the same value contained in the received Msg1 and an AS ID that is intended to be used separately for AIoT data communication with the AIoT device (1e-01) in the future.

[0146] In step 1e-70, the AIoT device (1e-01) can determine that contention resolution has been successful if the same value as the random number value transmitted in step 1e-60 is included in the Msg2 received in step 1e-65.

[0147] In step 1e-75, the AIoT device (1e-01) may transmit a Msg3 containing a (Temporary) device ID that can identify the AIoT device. The AIoT device (1e-01) may store in memory a state indicating that the inventory procedure or random access procedure was successfully performed after transmitting the Msg3, if it does not receive NACK information from the Reader (1e-02) indicating that it did not receive the Msg3 (e.g., an R2D message indicating NACK containing an AS ID (16-bit random number or assigned AS ID in Msg2) representing the AIoT device (1e-01) in Msg2), or if it does not receive NACK information indicating that it did not receive the Msg3 from the Reader (1e-02). This is to prevent the random access procedure from being performed redundantly in response to AIoT paging coming from the Reader (1e-02) in the future.

[0148] In step 1e-77, the Reader (1e-02) that receives the Msg3 containing the (Temporary) device ID can send an Inventory report message containing the device ID to the CN (1e-04).

[0149] FIG. 1f is a diagram illustrating a procedure for inventorying Ambient IoT (Internet of Things) devices in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0150] Referring to FIG. 1f, in steps 1f-10 and / or 1f-15, a Core Network (hereinafter CN (1f-04)) may transmit a predetermined message to a predetermined Reader (1f-02, 1f-03) to provide and / or request AIoT services. The predetermined message may include an Inventory request message. The CN (1f-04) may refer to an Access and Mobility Management Function (AMF) for supporting AIoT communication, or a new Core Network function (AIoT function, hereinafter AIoTF) or entity that supports AIoT communication. The Reader (1f-02, 1f-03) may refer to a Base Station (hereinafter BS) or User Equipment (hereinafter UE) that supports AIoT communication. The predetermined message may include at least one of the following information.

[0151] - Information About AIoT services

[0152] ■ The above information may refer to information regarding which service type, Inventory or Command, is represented.

[0153] - CN correlation ID

[0154] ■ The above CN correlation ID may refer to an identifier representing information about a specific AIoT service ID.

[0155] - Information used for AIoT reader selection

[0156] ■ The above information may refer to one or more terminal Reader identifiers or target area information.

[0157] - Information about the target AIoT device(s)

[0158] ■ The above information may refer to information capable of identifying a specific AIoT device, identifying a group of multiple AIoT devices, or identifying all AIoT devices. For example, the above information may include a specific AIoT device ID to identify a specific AIoT device, or filtering information that can be used in association with multiple AIoT devices to identify multiple AIoT devices, and / or an AIoT device ID or group AIoT device ID capable of identifying each AIoT device. The above information may be empty to indicate identification of all AIoT devices, or the above information may include an indicator to indicate this.

[0159] - Information to be used for resource allocation

[0160] ■ Approximate number of AIoT devices and / or approximate D2R (Device-to-Reader) message size

[0161] For reference, steps 1f-10 and 1f-15 may be performed simultaneously.

[0162] In step 1f-20, Reader (1f-03) may send a predetermined message to CN (1f-04) in response to step 1f-10. The predetermined message may include an Inventory response message.

[0163] In step 1f-25, Reader (1f-02) may send a predetermined message to CN (1f-04) in response to step 1f-15. Step 1f-25 may be performed simultaneously with step 1f-20. The predetermined message may include an Inventory response message.

[0164] In step 1f-30, the Reader (1f-02) can transmit an AIoT Paging message based on the message received in step 1f-15. The message may be transmitted as a broadcast. The message may include at least one of the following information.

[0165] - Information about target AIoT device(s)

[0166] ■ The above information may refer to the information described in step 1f-15. For example, it may refer to one AIoT device identifier (or a Temporary AIoT device ID mapped thereto) or one-group AIoT device identifier and / or filtering criteria (or a Temporary AIoT group device ID mapped thereto) and / or filtering criteria. The AIoT device ID cannot be decoded at the MAC layer of the AIoT device and is visible only at the upper layer of the AIoT device (e.g., the NAS layer). That is, the above information may be transparent to the MAC layer of the AIoT device. Of course, it may be decoded at the MAC layer of the AIoT device.

[0167] ■ The above information may be empty to instruct to identify all AIoT devices. Alternatively, a separate indicator to instruct to identify all AIoT devices may be included in the above information. The information to identify all AIoT devices may be visible at the MAC layer of the AIoT device, or it may be transparent to the AIoT device MAC layer as described above.

[0168] - Resource configuration information for target AIoT device(s) to send Message 1 (Msg 1)

[0169] ■ Resource configuration information for transmitting Message 1 via Frequency Division Multiple Access

[0170] ◆ Frequency shift and / or frequency channel resource information that enables Msg 1 to be transmitted on a specific frequency channel or bandwidth. For example, an AIoT device that receives frequency shift information to be used when transmitting Msg 1 can determine one frequency shift value randomly from the corresponding configuration information and transmit Msg 1 on the corresponding frequency channel or bandwidth.

[0171] ■ Resource configuration information for transmitting Message 1 via Time Frequency Multiple Access

[0172] ◆ Resource setting information that enables the transmission of Msg 1 at a specific time. For example, an AIoT device that receives time setting information that enables the transmission of Msg 1 can determine the time for transmitting Msg 1 by randomly selecting one time from the setting information.

[0173] - Transaction ID

[0174] ■ An ID generated from the CN correlation ID received from CN(1f-05), which can be composed of fewer bit values ​​than the CN correlation ID.

[0175] - Indicators or information indicating whether the inventory procedure should be performed using contention-based random access or contention-free random access.

[0176] ■ If information for only one AIoT device is included in AIoT paging, or if only one Msg1 resource is included (for one AIoT device), the AIoT device can perform the inventory procedure via contention-free random access. Of course, this can also be indicated through a separate directive.

[0177] ■ If information regarding at least two AIoT devices is included in the AIoT paging (for example, if information about a group of devices consisting of two or more AIoT devices is included, or if information is included instructing all AIoT devices to perform an inventory procedure), the relevant AIoT devices may perform the inventory procedure via contention-based random access. Of course, this can also be instructed through a separate indicator.

[0178] In step 1f-35, the AIoT device (1f-01) can determine whether there is information in the AIoT paging received through step 1f-30 that indicates the AIoT device (1f-01). That is, the MAC layer device of the AIoT device can forward information about the target AIoT device(s) contained in the AIoT paging to the upper layer (e.g., NAS layer) of the AIoT device. If the upper layer of the AIoT device contains a paging identifier indicating the AIoT device (1f-01), or a group paging identifier and / or filtering criteria to which the AIoT device (1f-01) belongs, or information indicating that all AIoT devices must perform an inventory procedure (e.g., an indicator indicating this, or if the information about the target AIoT device(s) is empty), the AIoT device (1f-01) can determine that it must perform an inventory procedure. For reference, if information about the target AIoT device(s) can be decoded at the MAC layer of the AIoT device, the MAC layer of the AIoT device may notify the upper layer of the AIoT device that an inventory procedure must be performed, or may notify it when necessary (e.g., when receiving necessary information from the upper layer of the AIoT device (e.g., when message 3 needs to be transmitted). In this case, the information about the target AIoT device(s) may include information that all AIoT devices must perform an inventory procedure.

[0179] In step 1f-40, the AIoT device (1f-01) triggered to perform the inventory procedure may initiate a random access procedure (contention-based random access or contention-free random access) according to the AIoT paging received in step 1f-30.

[0180] In step 1f-45, the Reader (1f-03) may transmit an AIoT Paging message based on the message received in step 1f-10. The message is transmitted via broadcast, and the information included in the message may follow step 1f-30. Note that the information included in the message may differ from that in step 1f-30. For example, the determination of resource configuration information for the target AIoT device(s) to transmit message 1 (Msg 1) and / or whether the target AIoT device(s) will perform an inventory procedure using contention-based random access or contention-free random access is the Reader implementation.

[0181] In step 1f-50, the AIoT device (1f-01) that initiated the random access procedure in step 1f-40 may stop it and apply the AIoT paging received in step 1f-45 to perform the random access procedure based thereon. For example,

[0182] - If there is information in the AIoT paging received in step 1f-45 indicating an AIoT device (1f-01),

[0183] ■ If the transaction ID received in the AIoT paging at step 1f-30 and the transaction ID received in the AIoT paging at step 1f-45 are different, the above AIoT device may stop the random access procedure initiated at step 1f-40 and apply the AIoT paging received at step 1f-45 to perform the random access procedure based thereon. This has the advantage of reducing the complexity of implementing the AIoT device by prioritizing the most recently triggered service when a service different from the currently ongoing service is triggered.

[0184] ■ If the signal received at step 1f-30 is worse than or equal to the signal received at step 1f-45, the above AIoT device may stop the random access procedure initiated at step 1f-40 and apply the AIoT Paging received at step 1f-45 to perform the random access procedure based thereon. This has the advantage of increasing the probability of success of the random access procedure.

[0185] ■ If the time at which message 1 (Msg1) is transmitted is later than or the same as step 1f-30 than step 1f-45, the random access procedure initiated in step 1f-40 can be stopped, and the AIoT paging received in step 1f-45 can be applied and the random access procedure can be performed based on it. This has the advantage of completing the random access procedure faster.

[0186] ■ If the AIoT device (1f-01) determines through step 1f-45 that it needs to perform contention-free random access and through step 1f-40 that it needs to perform contention-based random access, the random access procedure initiated in step 1f-40 can be stopped, and the AIoT paging received in step 1f-45 can be applied to perform the random access procedure based on it. This has the advantage of completing the random access procedure more quickly and efficiently.

[0187] If steps 1f-45 and 1f-50 are not performed, the AIoT device (1f-01) can receive (1f-55) an R2D message from the Reader (1f-02) that determines the resource for transmitting Msg1 (e.g., AIoT paging that does not contain information about the target AIoT device(s) or a new R2D message, e.g., a QueryRep-like message). Of course, if there is no energy to receive the message, the AIoT device (1f-01) may not receive it. If step 1f-45 is performed after step 1f-55, the AIoT device (1f-01) can perform the aforementioned steps in step 1f-50. That is, the AIoT device (1f-01) can perform steps 1f-55, 1f-45, and 1f-50 sequentially.

[0188] If an AIoT device (1f-01) performs only step 1f-55 without performing steps 1f-45 and 1f-50, the AIoT device (1f-01) can transmit Msg1. Specifically,

[0189] - An AIoT device that triggers contention-based random access can transmit Msg1 containing a randomly generated 16-bit value consisting of a specific number of bits (e.g., 16 bits).

[0190] - An AIoT device with contention-free random access triggered can transmit Msg1 containing a (Temporary) device ID that can identify the AIoT device.

[0191] Of course, in step 1f-60, the AIoT device (1f-01) may not be able to transmit Msg1 for a certain reason. The certain reason for not being able to transmit Msg1 may include a lack of energy or the case where the R2D message was not successfully received even after step 1f-55 was performed. If step 1f-45 occurs after step 1f-60, the AIoT device (1f-01) may perform the aforementioned steps in step 1f-50. That is, the AIoT device (1f-01) may sequentially perform steps 1f-60, 1f-45, and 1f-50. The AIoT device (1f-01) may perform step 1f-50 when step 1f-45 occurs in a state where Msg1 has been transmitted but Msg2 has not been received, or where Msg1 has been transmitted but Msg2 has not been received (e.g., when Msg2 has not been received for a certain period of time), or when Msg2 has not been received even though a certain period of time has elapsed.

[0192] In step 1f-65, the AIoT device (1f-01) may receive an R2D message from the Reader (1f-03) that can determine the resource for transmitting Msg1. The R2D message may include an AIoT paging or new R2D message (e.g., a QueryRep-like message) that does not contain information about the target AIoT device(s).

[0193] In step 1f-70, the AIoT device (1f-01) can transmit Msg1. Specifically,

[0194] - An AIoT device that triggers contention-based random access can transmit Msg1 containing a randomly generated 16-bit value composed of specific bits (e.g., 16 bits).

[0195] - An AIoT device with contention-free random access triggered can transmit Msg1 containing a (Temporary) device ID that can identify the AIoT device.

[0196] In step 1f-72, the Reader (1f-03) that receives Msg1 containing the device ID can send an Inventory report message containing the device ID to the CN (1f-04). The A-IoT device (1f-01) can store in memory the state that the inventory procedure or random access procedure was successfully performed if it does not receive NACK information (e.g., an R2D message indicating a NACK containing the device ID) indicating that it did not receive Msg1 from the Reader (1f-03), or if it does not receive NACK information indicating that it did not receive Msg1, or if it does not receive NACK information indicating that it did not receive Msg1. This is to prevent the random access procedure from being performed redundantly in response to AIoT paging coming from the Reader (1f-03) in the future.

[0197] In step 1f-75, the Reader (1f-03) that receives Msg1 containing a random value composed of 16 bits can transmit Msg2. That is, the Reader (1f-03) can transmit Msg2 by including the same value contained in Msg1 in Msg2. Of course, the Reader (1f-03) can also transmit Msg2 that includes the same value contained in the received Msg1 and an AS ID that is intended to be used separately for AIoT data communication with the AIoT device (1f-01) in the future.

[0198] In step 1f-80, the AIoT device (1f-01) can determine that contention resolution has been successful if the same value as the random number value transmitted in step 1f-70 is included in the Msg2 received in step 1f-75.

[0199] In step 1f-85, the AIoT device (1f-01) may transmit a Msg3 containing a (Temporary) device ID that can identify the AIoT device. The A-IoT device (1f-01) may store in memory a state that the inventory procedure or random access procedure has been successfully performed since transmitting the Msg3, if it does not receive NACK information indicating that it has not received the Msg3 from the Reader (1f-03) (e.g., an R2D message containing an AS ID (16-bit random number or assigned AS ID in Msg2) representing the A-IoT device (1f-01) in Msg2, or an R2D message containing an AS ID assigned by the Reader (1f-02) in Msg2), or if it does not receive an R2D message indicating a NACK containing an AS ID (16-bit random number or assigned AS ID in Msg2) representing the A-IoT device (1f-01) in Msg2, or if it does not receive an R2D message indicating a NACK containing an AS ID assigned by the Reader (1f-02) in Msg2. This is to prevent redundant responses to AIoT paging coming from Reader (1f-03) in the future, thereby avoiding the random access procedure.

[0200] In step 1f-87, the Reader (1f-03) that receives the Msg3 containing the (Temporary) device ID can send an Inventory report message containing the device ID to the CN (1f-04).

[0201] FIG. 1g is a block diagram illustrating the internal structure of a terminal according to one embodiment of the present disclosure.

[0202] Referring to the drawings above, the terminal includes an RF (Radio Frequency) processing unit (1g-10), a baseband processing unit (1g-20), a storage unit (1g-30), and a control unit (1g-40). Meanwhile, the terminal of the present disclosure may refer to the A-IoT device described above.

[0203] The RF processing unit (1g-10) can perform functions for transmitting and receiving signals through a wireless channel, such as signal band conversion and amplification. That is, the RF processing unit (1g-10) can up-convert a baseband signal provided by the baseband processing unit (1g-20) into an RF band signal and transmit it through an antenna, and down-convert an RF band signal received through the antenna into a baseband signal. For example, the RF processing unit (1g-10) may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC (digital to analog converter), an ADC (analog to digital converter), etc. Although only one antenna is shown in the drawing, the terminal may be equipped with multiple antennas. In addition, the RF processing unit (1g-10) may include multiple RF chains. Furthermore, the RF processing unit (1g-10) may perform beamforming. For the above beamforming, the RF processing unit (1g-10) can adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements. In addition, the RF processing unit can perform MIMO and can receive multiple layers when performing MIMO operation.

[0204] The baseband processing unit (1g-20) can perform a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the system. For example, when transmitting data, the baseband processing unit (1g-20) can generate complex symbols by encoding and modulating the transmitted bit sequence. Additionally, when receiving data, the baseband processing unit (1g-20) can restore the received bit sequence by demodulating and decoding the baseband signal provided by the RF processing unit (1g-10). For example, in the case of following the orthogonal frequency division multiplexing (OFDM) method, when transmitting data, the baseband processing unit (1g-20) generates complex symbols by encoding and modulating the transmitted bit sequence, maps the complex symbols to subcarriers, and then constructs OFDM symbols through inverse fast Fourier transform (IFFT) operations and cyclic prefix (CP) insertion. Additionally, upon receiving data, the baseband processing unit (1g-20) divides the baseband signal provided by the RF processing unit (1g-10) into OFDM symbol units, restores the signals mapped to subcarriers through a fast Fourier transform (FFT), and then restores the received bit sequence through demodulation and decoding.

[0205] The baseband processing unit (1g-20) and the RF processing unit (1g-10) can transmit and receive signals as described above. Accordingly, the baseband processing unit (1g-20) and the RF processing unit (1g-10) may be referred to as a transmitting unit, a receiving unit, a transmitting and receiving unit, or a communication unit. Furthermore, at least one of the baseband processing unit (1g-20) and the RF processing unit (1g-10) may include a plurality of communication modules to support a plurality of different wireless access technologies. Additionally, at least one of the baseband processing unit (1g-20) and the RF processing unit (1g-10) may include different communication modules to process signals of different frequency bands. For example, the different wireless access technologies may include wireless LAN (e.g., IEEE 802.11), cellular network (e.g., LTE), etc. In addition, the above different frequency bands may include super high frequency (SHF) bands (e.g., 2 NRHz, NRHz) and millimeter wave (e.g., 60 GHz) bands.

[0206] The storage unit (1g-30) can store data such as a basic program, an application program, and setting information for the operation of the terminal. In particular, the storage unit (1g-30) can store information related to a second connection node that performs wireless communication using a second wireless connection technology. Additionally, the storage unit (1g-30) provides the stored data upon a request from the control unit (1g-40).

[0207] The control unit (1g-40) controls the overall operations of the terminal. For example, the control unit (1g-40) transmits and receives signals through the baseband processing unit (1g-20) and the RF processing unit (1g-10). Additionally, the control unit (1g-40) writes and reads data to and from the storage unit (1g-40). To this end, the control unit (1g-40) may include at least one processor. For example, the control unit (1g-40) may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as applications.

[0208] FIG. 1h is a block diagram showing the configuration of an NR base station according to one embodiment of the present disclosure.

[0209] As illustrated in the drawing above, the base station is configured to include an RF processing unit (1h-10), a baseband processing unit (1h-20), a backhaul communication unit (1h-30), a storage unit (1h-40), and a control unit (1h-50). Meanwhile, the base station of the present disclosure may refer to the Reader or intermediate UE described above.

[0210] The RF processing unit (1h-10) can perform functions for transmitting and receiving signals through a wireless channel, such as signal band conversion and amplification. That is, the RF processing unit (1h-10) can up-convert a baseband signal provided by the baseband processing unit (1h-20) into an RF band signal and transmit it through an antenna, and down-convert an RF band signal received through the antenna into a baseband signal. For example, the RF processing unit (1h-10) may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. Although only one antenna is shown in the drawing, the first connection node may be equipped with multiple antennas. In addition, the RF processing unit (1h-10) may include multiple RF chains. Furthermore, the RF processing unit (1h-10) may perform beamforming. For the above beamforming, the RF processing unit (1h-10) can adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements. The RF processing unit can perform down-to-down MIMO operation by transmitting one or more layers.

[0211] The baseband processing unit (1h-20) can perform a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the first wireless access technology. For example, when transmitting data, the baseband processing unit (1h-20) can generate complex symbols by encoding and modulating the transmitted bit sequence. Additionally, when receiving data, the baseband processing unit (1h-20) can restore the received bit sequence by demodulating and decoding the baseband signal provided by the RF processing unit (1h-10). For example, in the case of following the OFDM method, when transmitting data, the baseband processing unit (1h-20) generates complex symbols by encoding and modulating the transmitted bit sequence, maps the complex symbols to subcarriers, and then constructs OFDM symbols through IFFT operation and CP insertion. Additionally, upon receiving data, the baseband processing unit (1h-20) divides the baseband signal provided by the RF processing unit (1h-10) into OFDM symbol units, restores the signals mapped to subcarriers through FFT operations, and then restores the received bit sequence through demodulation and decoding. The baseband processing unit (1h-20) and the RF processing unit (1h-10) transmit and receive signals as described above. Accordingly, the baseband processing unit (1h-20) and the RF processing unit (1h-10) may be referred to as a transmitting unit, a receiving unit, a transmitting and receiving unit, a communication unit, or a wireless communication unit.

[0212] The backhaul communication unit (1h-30) can provide an interface for communicating with other nodes within the network. That is, the backhaul communication unit (1h-30) converts a bit sequence transmitted from the main base station to another node, e.g., an auxiliary base station, a core network, etc., into a physical signal, and converts a physical signal received from the other node into a bit sequence.

[0213] The storage unit (1h-40) can store data such as basic programs, application programs, and configuration information for the operation of the main base station. In particular, the storage unit (1h-40) can store information regarding bearers assigned to connected terminals, measurement results reported from connected terminals, etc. Additionally, the storage unit (1h-40) can store information that serves as a criterion for determining whether to provide or disconnect multiple connections to the terminal. Furthermore, the storage unit (1h-40) provides the stored data upon the request of the control unit (1h-50).

[0214] The control unit (1h-50) controls the overall operations of the main station. For example, the control unit (1h-50) transmits and receives signals through the baseband processing unit (1h-20) and the RF processing unit (1h-10) or through the backhaul communication unit (1h-30). Additionally, the control unit (1h-50) writes and reads data to and from the storage unit (1h-40). To this end, the control unit (1h-50) may include at least one processor.

[0215] Methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0216] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. One or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of this disclosure.

[0217] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, ROM (Read Only Memory), Electrically Erasable Programmable Read Only Memory (EEPROM), magnetic disc storage devices, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0218] Additionally, the above program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present disclosure.

[0219] In the present disclosure, the terms “computer program product” or “computer readable medium” are used to collectively refer to media such as memory, a hard disk installed in a hard disk drive, and signals. These “computer program product” or “computer readable medium” are configurations provided in a method for reporting terminal capability in a wireless communication system according to the present disclosure.

[0220] A device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory storage medium' simply means that it is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily. For example, a 'non-transitory storage medium' may include a buffer in which data is stored temporarily.

[0221] According to one embodiment, the method according to the various embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., downloadable app) may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0222] In the specific embodiments of the present disclosure described above, the components included in the disclosure are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present disclosure is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed of a singular form, or even if a component is expressed in the singular form, it may be composed of a plural form.

[0223] Meanwhile, the embodiments of the present disclosure disclosed in this specification and drawings are merely specific examples provided to facilitate the explanation of the technical content of the present disclosure and to aid in understanding the present disclosure, and are not intended to limit the scope of the present disclosure. That is, it is obvious to those skilled in the art that other variations based on the technical concept of the present disclosure are possible. Furthermore, each of the above embodiments may be combined and operated as needed. For example, parts of one embodiment of the present disclosure and another embodiment may be combined to operate a base station and a terminal. In addition, the embodiments of the present disclosure are applicable to other communication systems, and other variations based on the technical concept of the embodiments may also be possible. For example, the embodiments may be applied to LTE systems, 5G, NR systems, or 6G systems, etc. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

Claims

1. A method performed by an Ambient Internet of Things (AIoT) device in a wireless communication system, A step of receiving a first AIoT Paging message from a first Reader; A step of initiating a random access procedure with the first Reader based on the first AIoT Paging message; A step of receiving a second AIoT Paging message from a second Reader; and A method characterized by continuing to perform a random access procedure with the first Reader based on the first AIoT Paging message when conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied.

2. In Paragraph 1, The first AIoT Paging message comprises at least one of first resource configuration information for transmitting Msg 1, a first transaction identifier (Transaction ID), or first information indicating which random access to perform among contention-based random access (CBRA) or contention-free random access (CFRA). A method characterized in that the second AIoT Paging message comprises at least one of second resource configuration information for transmitting Msg 1, a second transaction identifier, or second information indicating which random access between CBRA or CFRA to perform.

3. In Paragraph 2, A method characterized by satisfying conditions based on the first AIoT Paging message and the second AIoT Paging message, including the case where the first AIoT Paging message is received first.

4. In Paragraph 2, A method characterized by satisfying conditions based on the first AIoT Paging message and the second AIoT Paging message, including cases where the transmission time information of Msg 1 based on the first resource setting information is faster than the transmission time information of Msg 1 based on the second resource setting information.

5. In Paragraph 2, A method characterized by including a case in which it is determined that Msg 1 should be transmitted to the first Reader based on CFRA according to the first information, and Msg 1 should be transmitted to the second Reader based on CBRA according to the second information.

6. In Paragraph 2, A method characterized by including at least one of the cases in which conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, such as the first transaction identifier and the second transaction identifier being the same, or the reception signal of the first AIoT Paging message being better than the reception signal of the second AIoT Paging message.

7. A method performed by a first Reader in a wireless communication system, A step of transmitting a first AIoT Paging message to an Ambient Internet of Things (AIoT) device; If conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, the method includes the step of continuing to perform a random access procedure with the AIoT device based on the first AIoT Paging message. A method characterized in that the second AIoT Paging message is transmitted from the second Reader to the AIoT.

8. In Paragraph 7, The first AIoT Paging message comprises at least one of first resource configuration information for transmitting Msg 1, a first transaction identifier (Transaction ID), or first information indicating which random access to perform among contention-based random access (CBRA) or contention-free random access (CFRA). The second AIoT Paging message comprises at least one of second resource configuration information for transmitting Msg 1, a second transaction identifier, or second information indicating which random access between CBRA or CFRA to perform, and If the conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, i) If the above first AIoT Paging message is received first, ii) If the transmission time information of Msg 1 based on the first resource setting information is faster than the transmission time information of Msg 1 based on the second resource setting information, iii) If it is determined that Msg 1 should be transmitted to the first Reader based on CFRA according to the first information, and Msg 1 should be transmitted to the second Reader based on CBRA according to the second information, iv) If the first transaction identifier and the second transaction identifier are the same, or v) When the reception signal of the first AIoT Paging message is better than the reception signal of the second AIoT Paging message A method characterized by including at least one of the following.

9. In Ambient Internet of Things (AIoT) devices in wireless communication systems, At least one transceiver; At least one processor connected to the above at least one transceiver so as to be able to communicate; and The AIoT device is connected to communicate with at least one processor and is capable of executing individually or in any combination of the at least one processor, so that the AIoT device, Receive a first AIoT Paging message from the first Reader, and Based on the above first AIoT Paging message, a random access procedure is initiated with the above first Reader, and Receive a second AIoT Paging message from the second Reader, and A memory storing an instruction to continue performing a random access procedure with the first Reader based on the first AIoT Paging message when conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied; AIoT device including 10. In Paragraph 9, The first AIoT Paging message comprises at least one of first resource configuration information for transmitting Msg 1, a first transaction identifier (Transaction ID), or first information indicating which random access to perform among contention-based random access (CBRA) or contention-free random access (CFRA). An AIoT device characterized in that the above-mentioned second AIoT Paging message includes at least one of second resource configuration information for transmitting Msg 1, a second transaction identifier, or second information indicating which random access between CBRA or CFRA to perform.

11. In Paragraph 10, An AIoT device characterized by satisfying conditions based on the first AIoT Paging message and the second AIoT Paging message, including the case where the first AIoT Paging message is received first.

12. In Paragraph 10, An AIoT device characterized by satisfying conditions based on the first AIoT Paging message and the second AIoT Paging message, including a case where the transmission time information of Msg 1 based on the first resource setting information is faster than the transmission time information of Msg 1 based on the second resource setting information.

13. In Paragraph 10, An AIoT device characterized by including at least one of the following cases: a case in which it is determined that Msg 1 should be transmitted to the first Reader based on CFRA according to the first information, and Msg 1 should be transmitted to the second Reader based on CBRA according to the second information; a case in which the first transaction identifier and the second transaction identifier are the same; or a case in which the reception signal of the first AIoT Paging message is better than the reception signal of the second AIoT Paging message.

14. In a first Reader in a wireless communication system, At least one transceiver; At least one processor connected to the above at least one transceiver so as to be able to communicate; and The first Reader is connected to communicate with at least one processor and is capable of executing individually or in any combination of the at least one processor, so that the first Reader, Send a first AIoT Paging message to an Ambient Internet of Things (AIoT) device, and It includes a memory that stores a command to continue performing a random access procedure with the AIoT device based on the first AIoT Paging message when conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, and A first Reader characterized by the second AIoT Paging message being transmitted from the second Reader to the AIoT.

15. In Paragraph 14, The first AIoT Paging message comprises at least one of first resource configuration information for transmitting Msg 1, a first transaction identifier (Transaction ID), or first information indicating which random access to perform among contention-based random access (CBRA) or contention-free random access (CFRA). The second AIoT Paging message comprises at least one of second resource configuration information for transmitting Msg 1, a second transaction identifier, or second information indicating which random access between CBRA or CFRA to perform, and If the conditions based on the first AIoT Paging message and the second AIoT Paging message are satisfied, i) If the above first AIoT Paging message is received first, ii) If the transmission time information of Msg 1 based on the first resource setting information is faster than the transmission time information of Msg 1 based on the second resource setting information, iii) If it is determined that Msg 1 should be transmitted to the first Reader based on CFRA according to the first information, and Msg 1 should be transmitted to the second Reader based on CBRA according to the second information, iv) If the first transaction identifier and the second transaction identifier are the same, or v) When the reception signal of the first AIoT Paging message is better than the reception signal of the second AIoT Paging message A first reader characterized by including at least one of the following.

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