Communication apparatus and communication method

Abstract

To allow an Ambient Internet of Things (IoT) device to properly perform random access procedures.SOLUTION: A communication apparatus includes a communication unit that receives a first ambient IoT (Internet of Things) paging message from a first ambient IoT reader, and a control unit that executes a first procedure for the first ambient IoT reader to exchange messages with a network including a random access procedure on the basis of the first ambient IoT paging message, and when the communication unit receives a second ambient IoT paging message from a second ambient IoT reader while executing the first procedure, the control unit cancels the first procedure and executes a second procedure for the second ambient IoT reader to exchange messages with a network including a random access procedure on the basis of the second ambient IoT paging message.SELECTED DRAWING: Figure 15

Description

[Technical Field]

[0001] The present invention relates to a communication device and a communication method in a wireless communication system. [Background technology]

[0002] For NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption are being considered (for example, Non-Patent Document 1).

[0003] Furthermore, Release 18 of 3GPP (registered trademark) is considering Ambient Internet of Things (A-IoT) (for example, Non-Patent Document 2). Ambient IoT targets devices with extremely simple configurations for the lowest-end IoT applications that operate with extremely low power consumption. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V18.4.0 (2024-12) [Non-patent document 2] "New SID: Study on solutions for Ambient IoT (Internet of Things) in NR", RP-234058, 3GPP TSG RAN Meeting #102, December 2023 [Non-patent document 3] 3GPP TR 38.848 V18.0.0 (2023-09) [Non-patent document 4] 3GPP TS 38.321 V18.4.0 (2024-12) Summary of the Invention [Problem to be solved by the invention]

[0005] In an ambient IoT system, when an ambient IoT device exchanges messages with the network, it always goes through random access. When an ambient IoT device receives an A-IoT paging message and is executing a procedure including random access, if it receives another new A-IoT paging message, it is expected to interrupt the ongoing procedure and start a new procedure. In such a situation, depending on the implementation of the ambient IoT reader, there is a possibility that the procedure will be unintentionally interrupted repeatedly.

[0006] The present invention has been made in view of the above points, and has an object to enable an ambient IoT (Internet of Things) device to appropriately execute a random access procedure. [Means for solving the problem]

[0007] According to the disclosed technology, there is provided a communication device having a communication unit that receives a first ambient IoT (Internet of Things) paging message from a first ambient IoT reader, and a control unit that executes a first procedure for the first ambient IoT reader to exchange messages with a network including a random access procedure based on the first ambient IoT paging message, wherein if the communication unit receives a second ambient IoT paging message from a second ambient IoT reader while executing the first procedure, the control unit cancels the first procedure and executes a second procedure for the second ambient IoT reader to exchange messages with a network including a random access procedure based on the second ambient IoT paging message. [Effects of the Invention]

[0008] According to the disclosed technology, an ambient Internet of Things (IoT) device can properly perform a random access procedure. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system. [Figure 2] 1 is a diagram illustrating an example of a system according to an embodiment of the present invention. [Figure 3] FIG. 1 is a diagram showing an example (1) of a topology according to an embodiment of the present invention. [Figure 4] FIG. 10 is a diagram showing an example (2) of a topology according to an embodiment of the present invention. [Figure 5] FIG. 1 is a diagram illustrating an example (1) of an architecture according to an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram illustrating an example (2) of an architecture according to an embodiment of the present invention. [Figure 7] FIG. 2 is a diagram for explaining an example (1) of a protocol stack according to an embodiment of the present invention. [Figure 8] FIG. 2 is a diagram for explaining an example (2) of a protocol stack according to an embodiment of the present invention. [Figure 9] FIG. 10 is a sequence diagram illustrating an example of a random access procedure according to an embodiment of the present invention. [Figure 10] FIG. 10 is a diagram illustrating a processing example (1) of a transaction ID. [Figure 11] FIG. 10 is a diagram illustrating a processing example (2) of a transaction ID. [Figure 12] FIG. 10 is a diagram illustrating a transaction ID processing example (3). [Figure 13] FIG. 1 is a diagram for explaining a processing example (1) according to an embodiment of the present invention. [Figure 14] FIG. 10 is a diagram for explaining a second example of processing according to an embodiment of the present invention. [Figure 15] FIG. 10 is a diagram for explaining a processing example (3) according to an embodiment of the present invention. [Figure 16] FIG. 10 is a diagram for explaining a processing example (4) according to an embodiment of the present invention. [Figure 17] FIG. 10 is a diagram for explaining a processing example (5) according to an embodiment of the present invention. [Figure 18] FIG. 10 is a diagram for explaining a processing example (6) according to an embodiment of the present invention. [Figure 19] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 20] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention. [Figure 21] 1 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, but not limited to, the existing LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0012] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), are used. This is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0013] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0014] Furthermore, in the embodiments of the present invention, when radio parameters and the like are "configured," it may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0015] Fig. 1 is a diagram showing a configuration example (1) of a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0016] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is, for example, transmitted via NR-PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 in the downlink (DL) and receives control signals or data from the terminal 20 in the uplink (UL). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to the DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0017] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals.

[0018] Terminal 20 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (Component Carriers)) to communicate with base station 10. In carrier aggregation, one PCell (Primary cell) and one or more SCells (Secondary cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0019] In response to this, Ambient IoT (Ambient Internet of Things, AIoT) is being considered (for example, Non-Patent Document 2). Ambient IoT targets devices with extremely simple configurations for the lowest-end IoT applications that operate with extremely low power consumption.

[0020] For example, Ambient IoT can be considered for the following deployment scenarios and characteristics:

[0021] 1) Indoor or outdoor environment. 2) Base station characteristics, e.g., macro, micro or pico cell based deployments. 3) Connectivity topology, e.g., which nodes (base stations, UEs, relays, repeaters, etc.) communicate with ambient IoT devices? 4) TDD or FDD, and whether the frequency band is licensed or unlicensed. 5) Coexistence with UE and infrastructure in frequency bands for existing 3GPP technologies. 6) Traffic assumptions from and / or to the device.

[0022] Based on the above deployment scenarios and characteristics for relevant use cases, RAN design targets may include at least the following aspects:

[0023] 1) Power consumption 2) Complexity 3) Coverage 4) Data rate 5) Positioning accuracy

[0024] The feasibility of RAN design targets for use cases based on suitable deployment scenarios may be weighed and assumptions of required capabilities supported may be made clear.

[0025] For example, the following device categories may be considered for ambient IoT:

[0026] Device A has no power storage and is not capable of independent signal generation and amplification. Backscattering transmission is possible.

[0027] Device B has power storage and is not capable of independent signal generation. It is capable of backscatter transmission and amplifying the reflected signal using stored power.

[0028] Device C has power storage and is capable of independently generating a signal, i.e., it has active RF components for transmission.

[0029] The complexity of device A may be assumed to be about the same as that of an RFID.

[0030] Figure 2 is a diagram illustrating an example of a system according to an embodiment of the present invention. As shown in Figure 2, in step 1, an ambient IoT reader, which is a BS or a UE, sends an R2D message to an ambient IoT device (e.g., an RFID tag). The R2D message is a message from the reader to the device. In step 2, the ambient IoT device sends a D2R message to the ambient IoT reader. The D2R message is a message from the device to the reader. In step 3, the ambient IoT reader reports to the Access and Mobility Management Function (AMF) of the CN or the new node.

[0031] For ambient IoT devices, a compact protocol stack and reduced signaling procedures are being considered to enable Device-originating - Device-terminated triggered (DO-DTT) and Device-terminated (DT) data transmission, including paging, random access, data transmission including radio resource control aspects, and higher layer operations.

[0032] For example, the following network topology may be assumed for the ambient IoT (see Non-Patent Document 3):

[0033] FIG. 3 is a diagram showing an example topology (1) according to an embodiment of the present invention. Topology 1 shown in FIG. 3 is a configuration in which a BS and an ambient IoT device communicate with each other. The ambient IoT device communicates directly with the base station in a two-way manner. Furthermore, the BS is connected to an AMF (Access and Mobility Management Function) or a new node in a CN (Core Network). Hereinafter, a CN may refer to any node on the network.

[0034] Figure 4 is a diagram showing an example topology (2) according to an embodiment of the present invention. Topology 2 shown in Figure 4 is a configuration in which a BS and an ambient IoT device communicate via an intermediate node. The ambient IoT device performs bidirectional communication with the intermediate node located between the base station and the ambient IoT device. The intermediate node may be, for example, a relay, an IAB (Integrated Access and Backhaul) node, a UE, a repeater, etc. The intermediate node may receive DL data or signaling for an AIoT terminal from the BS and transmit the DL data or signaling to the AIoT terminal.

[0035] The intermediate node and the BS may be connected via a Uu interface. Uu is a wireless interface between a Universal Terrestrial Radio Access Network (UTRAN) and a User Equipment (UE). The intermediate node may transmit unmodulated waves to an AIoT terminal, receive UL data or signaling from the AIoT terminal, and transmit the UL data or signaling to the BS. The BS may also be connected to an AMF or a new node in the CN.

[0036] In addition, the base station, intermediate node, support node, or other node transmits an RF signal to the ambient IoT device. The ambient IoT device is activated and obtains power from an RF operating field from the base station, intermediate node, support node, or other node via inductive coupling. The ambient IoT device transmits information to the base station, intermediate node, support node, or other node by backscattering modulation of the RF signal received from the base station, intermediate node, support node, or other node by switching the reflection coefficient of its own antenna. For example, the ambient IoT device may transmit information using ON-OFF keying.

[0037] For RFID in the 860MHz-960MHz band, the reader of the RFID system corresponds to the base station, intermediate node, or support node of the ambient IoT system. The tag corresponds to the ambient IoT device. The RF signal from the reader to the tag is usually a sine wave of a predetermined frequency. ASK (Amplitude Shift Keying) modulation is used for DL ​​information from the reader to the tag. PIE (Pulse Interval Encoding) coding is also used for DL ​​information from the reader to the tag. ASK and / or PSK (Phase Shift Keying) modulation is used for UL backscattering. FM0 coding and Miller coding are also used for UL backscattering.

[0038] Additionally, the following device types may be defined:

[0039] Device 1) A device with a maximum power consumption of 1 μW or less, with energy storage and no DL or UL amplifiers. UL transmission is performed by backscattering an externally supplied carrier wave.

[0040] Device 2a) A device with a maximum power consumption of a few hundred μW or less, with power storage and DL and / or UL amplifiers. UL transmission is performed by backscattering an externally supplied carrier wave.

[0041] Device 2b) A device with a maximum power consumption of a few hundred μW or less, with power storage and with DL and / or UL amplifiers, where the UL transmission is generated internally within the device.

[0042] FIG. 5 is a diagram showing an example (1) of an architecture according to an embodiment of the present invention. FIG. 6 is a diagram showing an example (2) of an architecture according to an embodiment of the present invention. FIGS. 5 and 6 show examples of defining an architecture in which Topology 1 and Topology 2 are common. In FIGS. 5 and 6, a BS or an intermediate node (e.g., a UE) has an internal reader function node, and this node functions as a reader. In addition to this node, the BS and UE have an internal RAN function node. The RAN function node performs communication with a CN or a BS.

[0043] Figure 7 is a diagram for explaining an example (1) of a protocol stack according to an embodiment of the present invention. It has been agreed that the RRC, SDAP, PDCP, and RLC layers will not be supported in communication between an ambient IoT device and a network. Therefore, as shown in Figure 7, the following protocol stack is assumed:

[0044] NAS (Non-access stratum) / A-IoT NAS: A layer that transmits control information related to ambient IoT devices. It may be assumed to support end-to-end security protection. Note that "NAS / A-IoT NAS" may also mean "NAS or A-IoT NAS."

[0045] MAC / A-IoT MAC: Supports A-IoT random access procedures. May support other functions, such as BSR and SR-like functions. Note that "MAC / A-IoT MAC" may also mean "MAC or A-IoT MAC."

[0046] PHY / A-IoT PHY: Supports physical channels specific to the A-IoT system (PDRSH, PRDSH). May also support other required physical layer protocols. Note that "PHY / A-IoT PHY" may also mean "PHY or A-IoT PHY."

[0047] Figure 8 is a diagram for explaining an example (2) of a protocol stack according to an embodiment of the present invention. The protocol stack shown in Figure 8 is considered in Topology 1. In addition to the protocol stack shown in Figure 7, a Next Generation Application Protocol (NGAP) layer via an NG interface is defined between the gNB and the AIoT function (AMF or new node).

[0048] Figure 9 is a sequence diagram illustrating an example (1) of a random access procedure according to an embodiment of the present invention. Figure 9 illustrates an example in which random access solution 1 or 3-step contention-based random access (RA) is applied to the A-IoT random access procedure. The A-IoT reader may be a BS or a UE, which is an intermediate node. When an intermediate node is used, communication between the intermediate node and the CN may be performed via the BS. Solution 1 may be referred to as 3-step CBRA.

[0049] In ambient IoT systems, devices always perform random access when exchanging messages with the network, including 3-step random access, 2-step CBRA, and contention-free access.

[0050] Step 1: The CN sends an A-IoT paging instruction to the A-IoT reader via the NG interface. The A-IoT paging instruction may include information indicating the device or device group to be paged, or may include other information.

[0051] Step 2: The A-IoT reader sends an A-IoT paging message to the A-IoT device. The A-IoT paging message may include information specifying the device to be paged or a device group, or it may include neither and target all devices. The A-IoT paging message may also include a transaction ID or other information. Hereinafter, the A-IoT paging message will also be referred to as paging or paging message.

[0052] Step 3: The A-IoT device sends Msg1 to the A-IoT reader. Msg1 may include a 16-bit random ID. The A-IoT device may randomly select a transmission opportunity (e.g., frequency, time slot) to send Msg1. Msg1 may include other information.

[0053] Step 4: The A-IoT reader sends Msg2 to the A-IoT device. Msg2 may include the random ID included in Msg1.

[0054] Step 5: The A-IoT device sends Msg3 to the A-IoT reader. Msg3 is an upper layer message and may include the device ID or other information.

[0055] Step 6: The A-IoT reader sends Msg3, which is the upper layer message received in step 5, to the CN. Msg3 may include the device ID or other information.

[0056] Steps 3 to 6 may be called Random Access Solution 1.

[0057] Step 6′: If the A-IoT reader fails to receive Step 5, it may send Msg3-NACK, a message notifying the A-IoT device of the failure of random access. Msg3-NACK may also be called Msg4.

[0058] Step X: After the A-IoT random access is completed, an upper layer message may be sent from the CN to the A-IoT device. The CN sends an instruction to the A-IoT reader to send an upper layer message addressed to the A-IoT device.

[0059] Step X+1: The A-IoT reader forwards the upper layer message to the A-IoT device.

[0060] Step X+2: The A-IoT device replies to the CN according to the contents of the upper layer message received from the CN. For example, if the A-IoT device receives a read command, it replies with the read information.

[0061] Step X+3: The A-IoT reader forwards the upper layer message to the CN.

[0062] Steps X to X+3 may be executed after the completion of three-step random access, after the completion of two-step CBRA, or after contention-free access.

[0063] A transaction ID is an information element included in an A-IoT paging message sent from an A-IoT reader to an A-IoT device. When an A-IoT device receives an A-IoT paging message that contains the same transaction ID as the last A-IoT paging message it received, and if the execution of the procedure started by the paging message containing that transaction ID has not failed, the A-IoT device may ignore that A-IoT paging message.

[0064] An A-IoT reader may send multiple pages based on a single A-IoT paging request received from a CN. If an A-IoT device has successfully executed the procedure for that page at least once, it may ignore the duplicate page because there is no need to repeat the same procedure.

[0065] Figure 10 is a diagram for explaining transaction ID processing example (1). As shown in Figure 10, an A-IoT device that receives a paging message with transaction ID N sends Msg1. If the A-IoT device then receives a paging message with transaction ID N, it may ignore the received paging message since it has the same transaction ID.

[0066] Figure 11 is a diagram for explaining transaction ID processing example (2). As shown in Figure 11, an A-IoT device receives a paging message with transaction ID N and sends Msg1, but fails the subsequent procedure. If the A-IoT device subsequently receives a paging message with transaction ID N, the A-IoT device may send Msg1 since the previous procedure failed.

[0067] Figure 12 is a diagram for explaining transaction ID processing example (3). As shown in Figure 12, an A-IoT device that receives a paging message with transaction ID N sends Msg1. If the A-IoT device then receives a paging message with transaction ID M, the A-IoT device may send Msg1 since the transaction IDs are different.

[0068] Here, we are considering what to do if the A-IoT device receives another new paging message while executing the procedure. The possible actions are action 1) or action 2) shown below.

[0069] Action 1) Ignore other new paging messages: The A-IoT device will not receive new paging messages until the current procedure is completed.

[0070] Operation 2) Receive and process another new paging message. That is, if the newly received paging message has the same transaction ID as the last received paging message, ignore the paging message. If the newly received paging message has a transaction ID different from the last received paging message, stop the ongoing procedure and start a new procedure based on the newly received paging message. Note that since the procedure based on the last received paging message is ongoing and has not yet failed, there is no need to consider the case where the procedure fails.

[0071] Figure 13 is a diagram for explaining a processing example (1) according to an embodiment of the present invention. As shown in Figure 13, assume an environment in which an A-IoT device is in a position where it can receive paging from multiple A-IoT readers. When A-IoT reader A and the A-IoT device are executing a procedure, if a new paging is received from A-IoT reader B, the A-IoT device may stop the procedure with A-IoT reader A and start a procedure with A-IoT reader B.

[0072] In the environment shown in Figure 13, assume that an A-IoT device is currently executing a procedure including the three-step CBRA with A-IoT reader A. From the perspective of A-IoT reader A, the procedure is classified into Case 1) to Case 3) below depending on the progress of the procedure just before it was stopped.

[0073] Case 1) A-IoT reader A sends an A-IoT paging message (step 2 in Figure 9) but fails to receive Msg1 (step 3 in Figure 9). Depending on the implementation of A-IoT reader A, paging may be sent multiple times to improve reliability, so it is possible that A-IoT reader A may send the A-IoT paging message again.

[0074] Case 2) A-IoT reader A sends Msg2 (step 4 in Figure 9) but fails to receive Msg3 (step 5 in Figure 9). A-IoT reader A sends Msg3-NACK (step 6' in Figure 9) to the A-IoT device. Depending on the implementation of A-IoT reader A, A-IoT reader A may then send another A-IoT paging message to the A-IoT device that sent Msg3-NACK to instruct it to re-access.

[0075] Case 3) After sending the R2D upper layer message (step X+1 in Figure 9), A-IoT reader A fails to receive the D2R upper layer message (step X+2 in Figure 9) from the A-IoT device. A-IoT reader A has not yet decided whether to send a NACK to the A-IoT device in response to the failed reception in step X+2. The behavior of A-IoT reader A in case 3 is not specified.

[0076] 14 is a diagram for explaining a processing example (2) according to an embodiment of the present invention. As in the example described above, from the perspective of A-IoT reader A, it is not possible to recognize that the procedure being executed has been stopped, and therefore it will be perceived as if the D2R message it was expecting to receive from the A-IoT device has not arrived. As a result, depending on the implementation of A-IoT reader A, it is considered that A-IoT reader A will send a paging message again and restart the procedure for the A-IoT device.

[0077] Meanwhile, the A-IoT device should be executing a procedure for A-IoT reader B based on the paging message received from A-IoT reader B, but when it receives another page from A-IoT reader A as described above, it will stop the procedure for A-IoT reader B and start the procedure for A-IoT reader A. Then, depending on the implementation of A-IoT reader B, A-IoT reader B will send a paging message.

[0078] If the same action is repeated, there is a risk of falling into an unintentional repetitive action as shown in FIG.

[0079] Figure 15 is a diagram for explaining a processing example (3) according to an embodiment of the present invention. As shown in Figure 15, when an A-IoT device receives a new paging message while executing a procedure, it may send a D2R message to the A-IoT reader currently executing the procedure. The D2R message may be a message indicating that the A-IoT device has stopped the procedure it is executing. The D2R message may be sent to the A-IoT device using a D2R resource indicated in the most recently received R2D message, such as a paging message, Msg2, or R2D data transfer.

[0080] Figure 16 is a diagram for explaining a processing example (4) according to an embodiment of the present invention. As shown in Figure 16, when an A-IoT device receives a new paging message while executing a procedure, it may send a D2R message to the A-IoT reader currently executing the procedure. The D2R message may be a message indicating that the A-IoT device has stopped the procedure being executed. The D2R message may be Msg1 for CBRA, Msg3 for CBRA, or a message for transmitting D2R data.

[0081] Figure 17 is a diagram for explaining a processing example (5) according to an embodiment of the present invention. As shown in Figure 17, when an A-IoT device receives a new paging message while executing a procedure, it may send a D2R message to the A-IoT reader that sent the new paging message. The D2R message may be a message indicating that the A-IoT device has stopped the procedure it is executing. The D2R message may be Msg1 for CBRA, Msg3 for CBRA, or a message for transmitting D2R data.

[0082] Figure 18 is a diagram for explaining a processing example (6) according to an embodiment of the present invention. As shown in Figure 18, after the A-IoT device receives a new paging message and starts procedure Y while performing procedure X, it may ignore the paging message including the transaction ID associated with the currently performing procedure X. Alternatively, when the A-IoT device receives a new paging message while performing procedure X, it may consider the currently performing procedure X to be successful.

[0083] As described above, when an A-IoT device receives a paging message from another A-IoT reader while executing a procedure and starts a new procedure, it is possible to avoid unintended repetitive behavior such as redoing the previous procedure by receiving a paging message again from the A-IoT reader that was executing the previous procedure.

[0084] That is, ambient Internet of Things (IoT) devices can properly perform random access procedures.

[0085] (Device configuration) Next, a description will be given of examples of functional configurations of the base station 10, network node 30, and terminal 20 that perform the processes and operations described above. The base station 10, network node 30, and terminal 20 include functions for performing the above-described embodiments. However, the base station 10, network node 30, and terminal 20 may each include only a part of the functions of the embodiments.

[0086] <Base Station 10 and Network Node 30> FIG. 19 is a diagram showing an example of the functional configuration of the base station 10 and the network node 30. As shown in FIG. 19, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 19 is merely an example. As long as the operations according to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. Note that the network node 30 may have the same functional configuration as the base station 10. Furthermore, a network node 30 having multiple different functions in the system architecture may be composed of multiple network nodes 30 separated by function.

[0087] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 or another network node 30, and transmitting the signal by wire or wirelessly. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 or another network node 30, and acquiring, for example, information of a higher layer from the received signal. A communication unit including the transmitter 110 and the receiver 120 may be configured.

[0088] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 also transmits setting information, instructions, notifications, etc. related to a low-power wake-up signal to the terminal 20. The transmitter 110 also transmits notifications related to switching of monitoring operations to the terminal. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0089] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to the operations described in the embodiments.

[0090] The control unit 140 controls settings, instructions, and notifications related to the operations described in the embodiments. The function unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the function unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0091] <Terminal 20> Fig. 20 is a diagram showing an example of the functional configuration of terminal 20 in an embodiment of the present invention. As shown in Fig. 20, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 20 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. Transmitting unit 210 and receiving unit 220 may be collectively referred to as a communication unit.

[0092] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The transmitter 210 also transmits capability information related to the low-power wake-up signal to the base station 10. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. The receiver 220 also receives paging notification information and configuration information, instructions, and notifications related to the low-power wake-up signal from the base station 10. For example, the receiver 220 receives a low-power wake-up signal from the base station 10. The setting unit 230 stores various configuration information received by the receiver 220 from the base station 10. The setting unit 230 also stores pre-configured configuration information. The content of the configuration information is, for example, information related to the operations described in the embodiments.

[0093] As described in the embodiments, the control unit 240 controls settings, instructions, and notifications related to the operations described in the embodiments. A functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0094] (Hardware configuration) The block diagrams (FIGS. 19 and 20) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the one device or the multiple devices with software.

[0095] For example, a base station, a terminal, a network node, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 21 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The above-described base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0096] In the present disclosure, the term "apparatus" may be interchangeable with any two terms selected from a set of terms such as circuit, device, unit, module, chip, means, etc. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0097] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, memory 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls the reading, writing, or both reading and writing of data in the memory 1002 and storage 1003.

[0098] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, a baseband signal processing unit, a call processing unit, etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0099] The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 401 of the terminal 20 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by a single processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line, or may be provided to the computer via the communication device 1004, for example.

[0100] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0101] The memory 1002 is a computer-readable recording medium and may be configured, for example, as a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0102] Storage 1003 is a computer-readable recording medium, and may be, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, or a combination of at least two of these. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, memory 1002, storage 1003, or a database, server, or other appropriate medium including both memory 1002 and storage 1003.

[0103] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via a wired network, a wireless network, or both wired and wireless networks, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, or a combination of at least two of these. For example, a transmitting / receiving antenna, an amplifier unit, a transmitting / receiving unit, or a transmission path interface may be realized by the communication device 1004. The transmitting / receiving unit may be implemented as a transmitting unit and a receiving unit that are physically or logically separated.

[0104] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or a combination of at least two of these). The output device 1006 is an output device that outputs to the outside (for example, a display, a speaker, an LED lamp, or a combination of at least two of these). The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0105] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0106] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0107] <Configuration of this embodiment> (Section 1) a communication unit that receives a first ambient Internet of Things (IoT) paging message from a first ambient IoT reader; a control unit that executes a first procedure for exchanging messages with a network including a random access procedure based on the first ambient IoT paging message, to the first ambient IoT reader; If the communication unit receives a second ambient IoT paging message from a second ambient IoT reader while performing the first procedure, The control unit stops the first procedure and, based on the second ambient IoT paging message, executes a second procedure for the second ambient IoT reader to exchange messages with a network including a random access procedure. (Section 2) 2. The communication device according to claim 1, wherein, when the first procedure is stopped, the communication unit transmits a message indicating that the first procedure has been stopped to the first ambient IoT reader. (Section 3) The communication device described in claim 1, wherein when the communication unit stops the first procedure, it sends a message indicating that the first procedure has been stopped to the first ambient IoT reader via Msg1, Msg3, or a message for sending D2R data. (Section 4) 2. The communication device according to claim 1, wherein, when the first procedure is stopped, the communication unit transmits a message indicating that the first procedure has been stopped to the second ambient IoT reader. (Section 5) The communication device described in claim 1, wherein the control unit ignores an ambient IoT paging message including a transaction ID associated with the first procedure sent from the first ambient IoT reader when the first procedure is aborted. (Section 6) receiving a first ambient Internet of Things (IoT) paging message from a first ambient Internet of Things (IoT) reader; performing a first procedure for the first ambient IoT reader to exchange messages with a network, the first procedure including a random access procedure, based on the first ambient IoT paging message; If, during the first step, a second ambient IoT paging message is received from a second ambient IoT reader, A communication method in which a communication device executes a procedure of canceling the first procedure and executing a second procedure for the second ambient IoT reader to exchange messages with a network including a random access procedure based on the second ambient IoT paging message.

[0108] Any of the above configurations allows an ambient IoT (Internet of Things) device to properly execute a random access procedure. Furthermore, according to paragraphs 2 to 5, when an A-IoT device receives a paging message from another A-IoT reader while executing a procedure and starts a new procedure, it is possible to avoid unintended repetitive behavior, such as redoing the previous procedure due to receiving a paging message again from the A-IoT reader that was executing the previous procedure.

[0109] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0110] The aspects / embodiments described in the present disclosure may be categorized as Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (O-RAN), Wideband Code Division Multiple Access (W-CDMA) (registered trademark), Global System for Mobile communications (GSM) (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) Engineers) 802.11, IEEE802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x=n it is called Wi-Fi4, when x=ac it is called Wi-Fi5, when x=ax it is called Wi-Fi6 or Wi-Fi6E, when x=be it is Wi-Fi7, and when x=bn it is called Wi-Fi8, etc. Wi-Fi is a registered trademark.), IEEE802.16 (WiMAX (registered trademark), IEEE802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), network virtualization technology (e.g., NFV (Network Function Virtualization), SFC (Service Function Chaining), SDN (Software Defined Networking)), or LPWA (Low Power Wide Area). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Furthermore, "based on" naturally refers not only to a system that uses the technology, but also to a system that uses an extension or modification of the technology.

[0111] In the present disclosure, any two terms selected from a set of terms such as "base station (BS)", "radio base station", "fixed station (fixed station)", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point (AP)", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "radio unit (RU)", "remote unit (RU)", "control unit (CU)", "distributed unit (DU)", "remote radio head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "high altitude platform station (HAPS)", "airborne platform", "panel", "cell", "radio access network (RAN)", and "network" may be used interchangeably.

[0112] Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, or a super cell. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0113] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "Device", "Module" and "Terminal" may be used interchangeably.

[0114] A terminal may be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, router (e.g., home router, mobile router, etc.), TCU (Telematics Control Unit), or some other suitable terminology.

[0115] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a portion of the base station and the terminal may be called a transmitting device, a receiving device, a communication device, etc. Note that the devices constituting at least a portion of the base station and the terminal may be, for example, an object itself, such as a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an unmanned aerial vehicle, a stratospheric base station (e.g., a High Altitude Platform Station (HAPS)), an artificial satellite (e.g., a Low Earth Orbit (LEO) satellite, a Medium Earth Orbit (MEO) satellite, a Geostationary Earth Orbit (GEO) satellite), a drone (registered trademark), a multicopter, a quadcopter, a balloon, or an Internet of Things (IoT) device (e.g., a smart meter, a sensor), or may include, but are not limited to, an object or device mounted on the object. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is in a stationary state where it is not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0116] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)) or communication of a non-terrestrial network (NTN). In this case, the terminal 20 may be configured to have at least some of the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link or service link). For example, an uplink channel or a downlink channel may be read as a sidelink channel.

[0117] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0118] In addition, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0119] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB))), other signals, or a combination of at least two of these. Note that the physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU), for example. Furthermore, the RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC message may be, for example, a message used for controlling an RRC connection (for example, setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, or notification of a terminal's capabilities, or may be an information element within the message. Furthermore, notification of information may be explicit or implicit. Note that explicit notification of certain information means notification of the certain information itself, and implicit notification of certain information may mean notification of information other than the certain information, or may mean that the certain information is considered to have been notified when a certain condition is satisfied.Furthermore, notification of information may include not only notification between the same layers of different devices (e.g., between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (e.g., between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, notification of information from one device to another device may be performed via one or more devices. Regarding any information (e.g., a variable, a constant, a parameter, a setting) described in the present disclosure, even if not specifically stated in the above embodiments, information indicating / specifying (or related to) the any information (value) may be notified from any first device (e.g., a terminal / base station) to any second device (e.g., a base station / terminal).

[0120] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0121] In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, or DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as EPC (Evolved Packet Core) and 5GC (5G Core Network), and provides one or more network functions (NF: Network Functions), but is not limited to this.

[0122] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, the operation of "a terminal is configured to ..." or "configure UE to ..." may include the operation of "a base station transmits configuration information regarding the configuration of the terminal" and the operation of "a terminal configures a predetermined operation based on the configuration information."

[0123] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation.

[0124] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

[0125] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0126] The radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0127] For example, resources in the time domain may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. The time unit may be a fixed-length time unit independent of numerology, a variable-length time unit dependent on numerology, or both. Examples of fixed-length time units include, but are not limited to, a subframe consisting of one or more slots and a radio frame including multiple subframes. Examples of variable-length time units include, but are not limited to, a symbol and a slot including a fixed number of symbols. A certain time unit may be divided into shorter time units. Examples of shorter time units include, but are not limited to, a minislot consisting of fewer symbols than the number of symbols constituting a slot. The above-described time units may include, for example, time units used as units for scheduling, link adaptation, etc. Furthermore, any time unit in the present disclosure may be read as another time unit.

[0128] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of subcarrier spacing (SCS), symbol length, cyclic prefix length, and sampling time, for example.

[0129] Resources in the frequency domain may be defined, for example, by one or more frequency units. The one or more frequency units may include, for example, subcarriers, resource blocks (RBs), bandwidth parts (BWPs), carrier bandwidths, or a combination of at least two of these, but the terminology of the frequency units is not limited to these. The number of subcarriers included in a frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology. For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. A BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured within one carrier for terminal 20, and at least one of the BWPs may be activated. Any frequency unit in the present disclosure may be interchangeable with another frequency unit.

[0130] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0131] Furthermore, resources in the spatial domain may be defined, for example, in terms of one or more spatial units, including, but not limited to, a beam, a layer of MIMO (Multi-Input Multi-Output), an antenna port, or a combination of at least two of these.

[0132] Furthermore, the resources in the code domain may be defined by one or more code units, such as, but not limited to, a cyclic shift (CS), an orthogonal cover code (OCC), or a combination thereof.

[0133] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0134] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc. [Explanation of symbols]

[0135] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 30 network nodes 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. a communication unit for receiving a first ambient Internet of Things (IoT) paging message from a first ambient Internet of Things (IoT) reader; a control unit that causes the first ambient IoT reader to perform a first procedure of exchanging messages with a network, the first procedure including a random access procedure, based on the first ambient IoT paging message; When the communication unit receives a second ambient IoT paging message from a second ambient IoT reader while performing the first procedure, The control unit stops the first procedure and, based on the second ambient IoT paging message, executes a second procedure for exchanging messages with a network including a random access procedure with the second ambient IoT reader.

2. The communication device according to claim 1 , wherein when the first procedure is stopped, the communication unit transmits a message indicating that the first procedure has been stopped to the first ambient IoT reader.

3. The communication device of claim 1, wherein when the communication unit stops the first procedure, it sends a message indicating that the first procedure has been stopped to the first ambient IoT reader via Msg1, Msg3, or a message for sending D2R data.

4. The communication device according to claim 1 , wherein when the first procedure is stopped, the communication unit transmits a message indicating that the first procedure has been stopped to the second ambient IoT reader.

5. The communication device of claim 1 , wherein the control unit, when terminating the first procedure, ignores an ambient IoT paging message including a transaction ID associated with the first procedure sent from the first ambient IoT reader.

6. receiving a first ambient Internet of Things (IoT) paging message from a first ambient Internet of Things (IoT) reader; a step of having the first ambient IoT reader perform a first procedure of exchanging messages with a network, the first procedure including a random access procedure, based on the first ambient IoT paging message; If, during the first procedure, a second ambient IoT paging message is received from a second ambient IoT reader, A communication method in which a communication device executes a procedure of canceling the first procedure and executing a second procedure of exchanging messages with a network including a random access procedure based on the second ambient IoT paging message to the second ambient IoT reader.

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