Device and communication method

Abstract

This device to which electric power is supplied by environmental power-generation has a reception part which receives a signal which triggers transmission of uplink signals of a plurality of devices and a control part which, after the uplink signal was transmitted on the basis of reception of the signal, determines a window for monitoring a downlink signal on the basis of information included in the signal.

Description

Device and communication method

[0001] The present disclosure relates to devices and communication methods.

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

[0003] Furthermore, in Release 18 (Rel-18) of 3GPP (registered trademark), ambient IoT (A-IoT: Ambient Internet of Things) is being considered (see, for example, Non-Patent Document 2). Ambient IoT targets devices with extremely simple configurations for low-end IoT applications that operate with extremely low power consumption.

[0004] 3GPP TS 38.300 V17.3.0 (2022-12)”Revised SID on Ambient IoT”, RP-232404, 3GPP TSG RAN Meeting #101, September 20233GPP TR 38.848 V1.0.0 (2023-09)3GPP TS 36.211 V16.8.0 (2023-09)”Study on solutions for Ambient IoT (Internet of Things) in NR”, RP-234058, 3GPP TSG RAN Meeting #102, December 2023

[0005] It is conceivable that one R2D TX may trigger multiple D2R transmissions. In this case, the monitoring window for downstream signals such as R2D after the triggered D2R transmission may not be sufficiently considered, and the device may not be able to properly receive downstream signals such as R2D.

[0006] One aspect of the present disclosure provides a device and a communication method that can appropriately determine a window for monitoring a downstream signal.

[0007] A device according to one aspect of the present disclosure is a device that is powered by energy harvesting and has a receiving unit that receives a signal that triggers the transmission of upstream signals from multiple devices, and a control unit that transmits an upstream signal based on the reception of the signal and then determines a window for monitoring downstream signals based on information contained in the signal.

[0008] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. FIG. 1 is a diagram illustrating Topology 1. FIG. 2 is a diagram illustrating Topology 3 in DL assistance. FIG. 3 is a diagram illustrating Topology 4 in UL assistance. FIG. 4 is a diagram illustrating backscatter transmission. FIG. 5 is a diagram illustrating an example of a candidate topology for CW / R2D / D2R transmission in Topology 1. FIG. 6 is a diagram illustrating an example of a candidate topology for CW / R2D / D2R transmission in Topology 2. FIG. 7 is a diagram illustrating an example of an access procedure for an A-IoT device. FIG. 8 is a diagram illustrating R2D monitoring. FIG. 9 is a diagram illustrating multiple D2R transmission triggers by a single R2D message. FIG. 10 is a diagram illustrating Proposal 1. FIG. 11 is a diagram illustrating Proposal 2. FIG. 12 is a diagram illustrating Proposal 3. FIG. 13 is a diagram illustrating Proposal 5. FIG. 14 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. FIG. 15 is a block diagram illustrating an example of a configuration of a device according to an embodiment of the present disclosure. FIG. 16 is a diagram illustrating an example of the hardware configuration of a base station and a device according to an embodiment of the present disclosure. FIG. 17 is a diagram illustrating an example of the configuration of a vehicle according to an embodiment of the present disclosure.

[0009] Hereinafter, an embodiment according to one aspect of the present disclosure will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present disclosure is applied is not limited to the following embodiment.

[0010] In the operation of the wireless communication system according to the embodiment of the present disclosure, existing technology is used as appropriate. The existing technology is, for example, the existing LTE or NR, but is not limited to the existing LTE or NR. In addition, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced, unless otherwise specified.

[0011] In addition, in the embodiments of the present disclosure described below, terms 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) used in existing LTE 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-".

[0012] Furthermore, in the embodiments of the present disclosure, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or another method (for example, flexible duplex, etc.).

[0013] Furthermore, in the embodiments of the present disclosure, "configuring" radio parameters, etc. may mean that predetermined values ​​are pre-configured, or that radio parameters notified from a base station, a device, a terminal, etc. are set.

[0014] (Embodiment) <Wireless Communication System> FIG. 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. As illustrated in FIG. 1, the wireless communication system 1 includes a base station 10 and a device 20. While FIG. 1 illustrates one base station 10 and one device 20, this is merely an example, and multiple base stations and devices may exist. The base station may also be referred to as a BS (Base Station), gNB, or the like. The device 20 may be a form of terminal (UE: User Equipment) and may be an ambient IoT device, which is a device with lower complexity than an NB-IoT (Narrow Band Internet of Things) device. The ambient IoT device may also be referred to as an ambient IoT terminal, ambient IoT UE, or the like.

[0015] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the device 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. The frequency domain may be defined by the number of subcarriers or the number of resource blocks (RBs).

[0016] The base station 10 transmits DL signals such as control information, setting information, and data via DL (Downlink) to the device 20. The base station 10 receives UL signals such as control information, information related to the processing capability of the device 20 (device capability (information) or A-IoT capability (information); for example, capability, device capability, A-IoT capability, A-IoT device capability, etc.), and data via UP (Uplink) from the device 20.

[0017] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, the base station 10 transmits control information to the device 20 using the PDCCH, and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel or a data channel, and the PDCCH is an example of a downlink control channel. The PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0018] As will be described later, the wireless communication system may include intermediate nodes, assisting nodes, and / or terminals (UEs) (see <Device Types and Topologies> below). Note that, hereinafter, "and / or" may be written simply as " / ".

[0019] The device 20 is a communication device equipped with a wireless communication function, and may be an ambient IoT device (e.g., a sensor, etc.) as described above. Hereinafter, the ambient IoT device will also be referred to as an A-IoT UE.

[0020] The device 20 receives DL signals such as control signals, setting information, and data from the base station 10 via DL, and transmits UL signals such as control signals, capability information of the device 20, and data to the base station 10 via UL.

[0021] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channel may include a physical uplink shared channel (PUSCH), and the control channel may include a physical uplink control channel (PUCCH). For example, the device 20 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel or a data channel, and the PUCCH is an example of an uplink control channel. Note that the PUSCH or the PUCCH may be interpreted as uplink control information (UCI), control information, etc. transmitted in the PUSCH or the PUCCH.

[0022] <Ambient IoT> Rel-18 approved the study of ambient IoT, which is even lower-end than the existing NB-IoT (see, for example, Section 10 of Non-Patent Document 4) (see, for example, Non-Patent Document 2). Ambient IoT targets ultra-low power consumption and ultra-low complexity devices.

[0023] For Ambient IoT, for example, the following deployment scenarios and characteristics can be considered for relevant use cases: Indoor or outdoor environment; Base station type, for example, macro / micro / pico cell-based deployment; Connectivity topology, for example, which nodes, such as base stations, terminals (UE), relays, and repeaters, communicate with Ambient IoT devices; Duplexing method, TDD or FDD, and frequency band, licensed or unlicensed; Coexistence with UE and network equipment in frequency bands for existing 3GPP technologies; Assumptions of traffic originating from / terminating at devices.

[0024] Based on the above deployment scenarios and characteristics, for example, the following RAN design targets can be formulated: power consumption, complexity, coverage, data rate, and positioning accuracy.

[0025] Based on deployment scenarios appropriate for the relevant use cases, compare and evaluate the feasibility of meeting design targets and identify supporting features.

[0026] <Device Types and Topologies> Based on the results of the study items, TR 38.848 (Non-Patent Document 3) was approved. TR 38.848 considers the following categories of ambient IoT devices: Device A: Device A has no power (energy) storage, no independent signal generation or signal amplification functions, and performs backscattering transmission. Device B: Device B has power storage, no independent signal generation function, and performs backscattering transmission. Device B uses the stored power to amplify the reflected signal. Device C: Device C has power storage, independent signal generation function, and an active RF (radio frequency) component for transmission.

[0027] The complexity of device A is assumed to be about the same as RFID (Frequency Frequency Identification).

[0028] TR 38.848 defines the following topologies 1 to 4 in an ambient IoT network.

[0029] Fig. 2 is a diagram illustrating Topology 1. As shown in Fig. 2, Topology 1 is a configuration in which a base station (BS) and an ambient IoT device communicate with each other. The ambient IoT device directly communicates with the base station in a two-way manner.

[0030] 3 is a diagram illustrating Topology 2. As shown in FIG. 3, Topology 2 is a configuration in which a base station and an ambient IoT device communicate with each other 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 integrated access and backhaul (IAB) node, a UE, a repeater, or the like.

[0031] 4 is a diagram illustrating Topology 3 in DL assistance. As shown in FIG. 4, Topology 3 is a configuration including communication between a base station and an assisting node, communication between the assisting node and an ambient IoT device, and communication between the ambient IoT device and a base station.

[0032] The support node supports DL communication. For example, as shown in Figure 4, the support node receives DL signals from the base station and transmits the received DL signals to the ambient IoT device. For UL communication, the ambient IoT device transmits UL signals directly to the base station.

[0033] Fig. 5 is a diagram illustrating Topology 3 in UL support. As shown in Fig. 5, Topology 3 is a configuration including communication between a base station and a support node, communication between a support node and an ambient IoT device, and communication between the ambient IoT device and a base station.

[0034] The support node supports UL communication. For example, as shown in Figure 5, the support node receives UL signals from the ambient IoT device and transmits the received UL signals to the base station. For DL ​​communication, the ambient IoT device receives DL signals directly from the base station.

[0035] The supporting nodes shown in FIGS. 4 and 5 may be, for example, relays, IAB nodes, UEs, repeaters, etc.

[0036] 6 is a diagram illustrating Topology 4. Topology 4 is a configuration in which a UE and an ambient IoT device communicate with each other. The ambient IoT device performs bidirectional communication with the UE. Communication related to Topology 4 may be considered as side link (SL) communication.

[0037] In the above topologies 1 to 4, the ambient IoT device may be provided with a carrier wave from another node inside or outside the topology (see Section 4.2.1 of Non-Patent Document 3).

[0038] The wireless communication system 1 (wireless communication network) may include a base station, a support node, an intermediate node, and / or a terminal (UE of Topology 4) in addition to the device 20. In this specification, the base station, the support node, the intermediate node, and the terminal may be read as a network or a (network) node. Also, an A-IoT device may be simply referred to as A-IoT.

[0039] Backscatter Transmission Base stations, intermediate nodes, support nodes, and other nodes transmit RF signals to ambient IoT devices that are activated and obtain power from the RF operating fields from the base stations, intermediate nodes, support nodes, and other nodes via inductive coupling.

[0040] The ambient IoT device backscatters and modulates the RF signals received from the base station, intermediate node, support node, and other nodes by switching the reflection coefficient of the device's antenna, and transmits information to the base station, intermediate node, support node, and other nodes.

[0041] FIG. 7 is a diagram illustrating backscatter transmission. FIG. 7 shows an example in which an ambient IoT device performs ON-OFF keying and transmits information. The dashed line area shown in FIG. 7 indicates an OFF section, which may correspond to information (bit) "0." A sine wave signal may correspond to information "1."

[0042] <Rel-19 SID> The Rel-19 SID (Study Item Description) examined solutions necessary and feasible for A-IoT (see Section 4.1 of Non-Patent Document 5). The examined solutions include, for example, determining which functions, procedures, etc. are necessary and which functions, procedures, etc. are not.

[0043] Additionally, for the DL and UL of A-IoT, several issues will be discussed under the leadership of RAN 1. One of the issues to be discussed is the scheduling and timing relationship between DL and UL in A-IoT. In discussing the scheduling and timing relationship, the following 1. traffic flow, 2. device assumptions, and 3. topology may be considered.

[0044] 1. Traffic Flow The following DT and DO-DTT are being considered as traffic flows for A-IoT.

[0045] DT (device terminated) Traffic includes transmission (DL) to the A-IoT UE, but no transmission (UL) from the A-IoT UE. In other words, there is information to be transmitted to the A-IoT UE, but no information to be transmitted from the A-IoT UE. DT corresponds to a command type in which there is an instruction such as a command or instruction to the A-IoT UE.

[0046] DO-DTT (device originated - device terminated triggered) Traffic includes a trigger from the network (NW) and a transmission (UL) from the A-IoT UE. In other words, traffic includes information transmitted from the A-IoT UE. DO-DTT corresponds to, for example, a sensor information report type in which the A-IoT UE transmits sensor information collected by the A-IoT UE.

[0047] In this disclosure, transmission of information corresponds to transmission of a signal containing information or transmission of a signal. In this disclosure, transmission to a certain device X corresponds to transmission of a signal (or information) to device X. In addition, transmission from a certain device X and transmission by a certain device X correspond to device X transmitting a signal (or information). In addition, reception from a certain device X corresponds to receiving a signal (or information) transmitted by device X. In addition, reception by a certain device X corresponds to device X receiving a signal (or information).

[0048] 2. Device Assumptions The following TX (transmission) and FR (frequency range) 1-FDD are assumed for A-IoT UE.

[0049] TX TX is a backscatter UL transmission without amplification or a general UL transmission with amplification. Alternatively, a backscatter UL transmission with amplification may be performed.

[0050] FR1-FDD FR1-FDD is applied to the A-IoT UE. That is, the A-IoT UE can switch carrier frequencies between DL carriers and UL carriers. However, the present disclosure is not limited to FR1-FDD and may be applied to TDD, FR2, or FR3.

[0051] The frequency bands of each FR are, for example, as follows: FR1: 410 MHz to 7.125 GHz FR2: 24.25 GHz to 52.6 GHz FR3: 7.125 GHz to 24.25 GHz

[0052] FR1 may use a sub-carrier spacing (SCS) of 15 kHz, 30 kHz, or 60 kHz, and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, and may use an SCS of 60 kHz or 120 kHz (including 240 kHz), and a bandwidth (BW) of 50 to 400 MHz.

[0053] 3. Topology Among the topologies shown in FIGS. 2 to 6, attention is focused on Topology 1 and Topology 2.

[0054] In Topology 1, UL and / or DL ​​communication is performed between a base station and an A-IoT UE without passing through an intermediate node. Note that the base station in Topology 1 may correspond to a microcell.

[0055] In Topology 2, communication is performed between a base station and an A-IoT UE via an intermediate node. The A-IoT UE performs bidirectional communication with an intermediate node located between the base station and the A-IoT UE. Note that the base station in the case of Topology 2 may correspond to a macrocell. The case of Topology 2 may also be applied to indoor cases. Hereinafter, the intermediate node will also be referred to as an intermediate UE, int. UE (intermediate UE), etc.

[0056] <Device Types> The following three device types, Device 1, Device 2a, and Device 2b, are defined for A-IoT devices.

[0057] Device 1 (may be referred to as Type 1) Device 1 is a device type that consumes a peak power of 1 μW or less. Device 1 has energy storage and an initial sampling frequency offset (SFO) of up to Z ppm (parts per million) (Z is 10 to the xth power (x is an integer equal to or greater than 0)). Device 1 does not have any amplification in either DL or UL. UL transmission in Device 1 is performed by backscattering an externally provided carrier wave (CW), i.e., an unmodulated wave.

[0058] Device 2a (may be referred to as type 2a) Device 2a is a device type that consumes a peak power of several hundred μW. Device 2a has energy storage and has an initial sampling frequency offset of up to Z [ppm] (Z is 10 to the xth power (x is an integer equal to or greater than 0)). Furthermore, DL and / or UL amplification is performed in device 2a. UL transmission in device 2a is performed by backscattering in CW provided from an external device.

[0059] Device 2b (may be referred to as type 2b) Device 2b is a device type that consumes a peak power of several hundred μW. Device 2b has energy storage and an initial sampling frequency offset of up to Z [ppm] (Z is 10 to the xth power (x is an integer equal to or greater than 0)). Furthermore, DL and / or UL amplification is performed in device 2b. UL transmission in device 2b is performed inside device 2b. In other words, UL transmission in device 2b does not need to be performed by backscattering in CW provided from an external source.

[0060] <R2D and D2R> At the RAN1#116 meeting, it was agreed to consider the physical channels for R2D data transmission and D2R data transmission.

[0061] R2D stands for "reader to device." D2R stands for "device to reader." A "reader" corresponds to a base station or intermediate node. A "device" corresponds to A-IoT.

[0062] R2D may be considered as DL in an A-IoT wireless communication system. R2D data transmission may be performed on a physical channel such as the physical reader to device channel (PRDCH). R2D control transmission may be performed on the same physical channel as R2D data transmission or on a different physical channel from R2D data transmission.

[0063] D2R can be considered as the UL in an A-IoT wireless communication system. D2R data transmission can be performed on a physical channel such as a physical device to reader channel (PDRCH). D2R control transmission can be performed on the same physical channel as D2R data transmission or on a physical channel separate from D2R.

[0064] R2D, R2D transmission, R2D signal, DL, and DL signal may be used interchangeably. D2R, D2R transmission, R2D signal, UL, and UL signal may be used interchangeably. R2D control transmission may be referred to as R2D control information or control information. D2R control transmission may be referred to as D2R control information or control information. Signal, data, and information may be used interchangeably.

[0065] <Candidate Topologies> Next, candidate topologies for CW / R2D / D2R transmission will be described.

[0066] Fig. 8 is a diagram showing examples of candidate topologies for CW / R2D / D2R transmission in Topology 1. Fig. 8 shows Topology 1A, Topology 1B, Topology 1C, Topology 1D, and Topology 1E as examples of candidate topologies.

[0067] As shown in FIG. 8, in topologies 1A to 1E, CW / R2D communication signals (sometimes referred to as "R2D" in FIG. 8 and below) / D2R communication signals (sometimes referred to as "D2R" in FIG. 8 and below) can be transmitted and received to A-IoT devices.

[0068] In this embodiment, DL and R2D (reader to device) may be interchangeable, and UL and D2R (device to reader) may be interchangeable, where the reader corresponds to a BS and / or an intermediate UE, and the device corresponds to an A-IoT device.

[0069] In Topology 1A, the node (first BS) that transmits the CW is different from the node (second BS) that receives the D2R communication signal transmitted by the A-IoT device via backscattering, and the node that transmits the CW is the same as the node that transmits the R2D communication signal. Also, the node that transmits the R2D communication signal is different from the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering. In other words, the R in R2D is different from the R in D2R.

[0070] In Topology 1B, the node (BS) that transmits the CW, the node that transmits the R2D communication signal, and the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering are the same.

[0071] In topology 1C, the node that transmits the CW (CW node) is different from the node that transmits the R2D communication signal (BS). Also, in topology 1C, the node that transmits the CW is different from the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering (BS). Also, in topology 1C, the node that transmits the R2D communication signal is the same as the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering. In other words, the R in R2D and the R in D2R are the same. Note that the CW node may be a BS / (intermediate) UE / IAB node / NCR (network-controlled repeater) node / relay node / other type of node.

[0072] In Topology 1D, the node (BS) that transmits the signal for R2D communication is the same as the node that receives the signal for D2R communication generated and transmitted by the A-IoT device, i.e., R in R2D and R in D2R are the same.

[0073] In Topology 1E, the node (first BS) that transmits the R2D communication signal is different from the node (second BS) that receives the D2R communication signal generated and transmitted by the A-IoT device. That is, the R in R2D is different from the R in D2R.

[0074] Fig. 9 is a diagram showing examples of candidate topologies for CW / R2D / D2R transmission in Topology 2. Fig. 9 shows Topology 2A, Topology 2B, Topology 2C, Topology 2D, and Topology 2E as examples of candidate topologies.

[0075] As shown in Figure 9, in topologies 2A to 2E, CW / R2D communication signals (denoted as "R2D" in Figure 9) / D2R communication signals (denoted as "D2R" in Figure 9) can be sent and received to A-IoT devices.

[0076] In Topology 2A, the node (first intermediate UE) that transmits the CW is different from the node (second intermediate UE) that receives the D2R communication signal transmitted by the A-IoT device via backscattering, and the node that transmits the CW is the same as the node that transmits the R2D communication signal. Also, the node that transmits the R2D communication signal is different from the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering. In other words, the R in R2D is different from the R in D2R.

[0077] In Topology 2B, the node that transmits the CW (intermediate UE), the node that transmits the R2D communication signal, and the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering are the same.

[0078] In Topology 2C, the node that transmits the CW (CW node) is different from the node that transmits the R2D communication signal (intermediate UE). Also, in Topology 1C, the node that transmits the CW is different from the node (BS) that receives the D2R communication signal transmitted by the A-IoT device via backscattering. Also, in Topology 1C, the node that transmits the R2D communication signal is the same as the node that receives the D2R communication signal transmitted by the A-IoT device via backscattering. In other words, the R in R2D and the R in D2R are the same. Note that the CW node may be a BS / (intermediate) UE / IAB node / NCR node / relay node / other type of node.

[0079] In Topology 2D, the node (intermediate UE) that transmits the signal for R2D communication is the same as the node that receives the signal for D2R communication generated and transmitted by the A-IoT device, i.e., R in R2D and R in D2R are the same.

[0080] In Topology 2E, the node (first intermediate UE) that transmits the R2D communication signal is different from the node (second intermediate UE) that receives the D2R communication signal generated and transmitted by the A-IoT device. That is, R in R2D is different from R in D2R.

[0081] <Access Procedure for A-IoT Devices> In an A-IoT communication session, an access procedure for an A-IoT device (hereinafter simply referred to as a device) is executed. Two approaches are being considered for the access procedure for an A-IoT device: a two-step approach and a four-step approach.

[0082] Fig. 10 is a diagram showing an example of an access procedure for an A-IoT device. Fig. 10 shows signal exchange between one reader and one device. The horizontal axis of Fig. 10 indicates the time axis. Fig. 10 shows exchanges including a two-step access procedure and a four-step access procedure.

[0083] In the two-step access procedure, the reader sends an A-IoT paging message. The A-IoT paging message is the first R2D transmission in an A-IoT communication session. The device that receives the A-IoT paging message sends a message called A-IoT Msg1 to the reader. In the two-step access procedure, the A-IoT Msg1 contains information that identifies the device (e.g., device ID). The A-IoT Msg1 can be considered a device ID report.

[0084] A reader that receives A-IoT Msg1 sends a message called A-IoT Msg2 to the device. For example, a reader that receives A-IoT Msg1 sends A-IoT Msg2 addressed to the device indicated by the device ID included in A-IoT Msg1. A-IoT Msg2 includes information indicating contention resolution. A-IoT Msg2 can also be considered contention resolution. The two-step access procedure is then completed.

[0085] In the four-step access procedure, the reader sends an A-IoT paging message. A device that receives the A-IoT paging message sends a message called A-IoT Msg1 to the reader. In the four-step access procedure, A-IoT Msg1 includes a random ID. A-IoT Msg1 can be considered a random ID report.

[0086] A reader that receives A-IoT Msg1 sends a message called A-IoT Msg2 to the device. For example, a reader that receives A-IoT Msg1 sends A-IoT Msg2 that includes the random ID included in A-IoT Msg1. A-IoT Msg2 includes information indicating contention resolution. A-IoT Msg2 may be considered contention resolution.

[0087] The device receives A-IoT Msg2 and sends A-IoT Msg3 to the reader. For example, if the random ID of the received A-IoT Msg2 matches the random ID of the sent A-IoT Msg1, the device sends A-IoT Msg3 to the reader. In the four-step access procedure, A-IoT Msg3 contains information that identifies the device (e.g., device ID). A-IoT Msg3 may be considered a device ID report.

[0088] Upon receiving A-IoT Msg3, the reader sends a response (e.g., R2D response), completing the four-step access procedure.

[0089] In the case of an "inventory" use case, such as checking the presence of an A-IoT device, each communication session may include only the two-step access procedure or the four-step access procedure described above. The "inventory" use case is not limited to checking the presence of an A-IoT device.

[0090] In exchanges including the access procedures shown in Figure 10, etc., a contention-based access procedure such as slotted-ALOHA may be applied at least for A-IoT Msg1.

[0091] In an A-IoT communication session, a single A-IoT page may be sent to multiple devices. After receiving the single A-IoT page, the multiple devices may continue with subsequent transmissions / receptions in the communication session. The subsequent transmissions / receptions in the devices may be at least one of sending an A-IoT Msg1, receiving an A-IoT Msg2, sending an A-IoT Msg3, receiving an R2D response, receiving an R2D command message, and sending a D2R response, as shown in FIG. 10.

[0092] In the exchanges including the access procedures shown in Figure 10 etc., A-IoT Paging, A-IoT Msg1, A-IoT Msg2, A-IoT Msg3 may be abbreviated as Paging, Msg1, Msg2, Msg3, respectively. Furthermore, A-IoT Paging, A-IoT Msg1, A-IoT Msg2, A-IoT Msg3 may be associated with names different from these names.

[0093] The message type may be any of A-IoT Paging, A-IoT Msg1, A-IoT Msg2, A-IoT Msg3, R2D Response, R2D Command Message, and D2R Response. R2D Response may be omitted. The message type may be interchangeably referred to as Message. Message may be interchangeably referred to as Signal, Information, etc. For example, Sending / Receiving a Message may be interchangeably referred to as Sending / Receiving a Signal. An R2D Command Message may be referred to as R2D Command or R2D Data.

[0094] <R2D Monitoring> After D2R TX is executed, the corresponding R2D TX is executed, and the device is expected to monitor the R2D. For monitoring the R2D in the device, the following cases 1 and 2 can be considered.

[0095] Case 1: Monitoring the R2D after the first D2R TX in contention-based access. The first D2R TX may be A-IoT Msg1. The R2D after the first D2R TX may be A-IoT Msg2 for contention resolution (see dotted box A10a in Figure 10). In Case 1, the device may be expected to monitor the R2D (see dotted box A10a in Figure 10) after the first D2R TX.

[0096] Case 2: Monitoring the R2D after the second D2R TX in contention-based access The second D2R TX may be an A-IoT Msg3. The R2D after the second D2R TX may be a response (see dotted box A10b in FIG. 10) or an R2D command (see dotted box A10c in FIG. 10) corresponding to the A-IoT Msg3 including the device ID. In Case 2, the device may be expected to monitor the R2D (see dotted box A10b or dotted box A10c in FIG. 10) after sending the A-IoT Msg3 including the device ID.

[0097] <Agreement on R2D Monitoring> In R2D monitoring, if timing constraints, such as a window, are not defined / determined, the device may monitor the R2D until the R2D RX (reception) is complete or there is no more energy for R2D monitoring. In this case, the charging time per device is expected to be significantly longer, which may degrade latency from the system perspective.

[0098] To avoid this situation, the definition of a monitoring window for R2D corresponding to D2R was discussed and the following was agreed upon:

[0099] Agreement If an R2D transmission in response to a D2R transmission is expected for an A-IoT device's A-IoT Msg2 response to A-IoT Msg1, the maximum time T between a D2R transmission and the subsequent corresponding R2D transmission D2R_max and the R2D transmission timing is defined as [T D2R_min ,T D2R_max ] will be considered so that it is expected to be within

[0100] For example, an R2D transmission in response to a D2R transmission (see arrow A11a in FIG. 11) is D2R_min ,T D2R_max ] (see the double arrow A11b in FIG. 11). In other words, the leader D2R_min ,T D2R_max ], and the device sends the R2D D2R_min ,T D2R_max Expect R2D to be sent within [T D2R_min ,T D2R_max ] may be thought of as an R2D monitoring window during which the device monitors the R2D.

[0101] <Terminology, etc.> A-IoT device or device: A device included in an A-IoT system that has one of multiple device types, as described above.

[0102] Reader: A D2R receiver reader can be either a BS or a UE. A UE that acts as a reader may be called an intermediate UE. The R2D transmitter and D2R receiver may be the same node or different nodes.

[0103] R2D: Abbreviation for Reader-to-Device link. PRDCH: Abbreviation for physical R2D channel. D2R: Abbreviation for Device-to-Reader link. PDRCH: Abbreviation for physical D2R channel.

[0104] DT traffic: Abbreviation for Device Terminated traffic. DT traffic is, for example, a command from the reader.

[0105] DO-DTT traffic: Device Originated-Device Terminated Trigger DO-DTT traffic is, for example, inventory traffic.

[0106] The timing acquisition signal / preamble / midamble / postamble / synchronization signal may be interchangeable.

[0107] For each proposal in this embodiment, and, if each proposal includes an alternative / option, for each alternative / option, at least one of the following may be applied. Multiple proposals may be combined. Multiple options may be combined. Multiple alternatives may be combined. Different options / alternatives may be applied on a case-by-case basis. The indication / configuration may be transmitted in physical layer control information or in a higher layer payload. For example, the indication / configuration may be transmitted in at least one of MAC layer control information, Msg0 (paging), Msg2 (RAR), Msg4, and unicast. The indication / configuration may be transmitted via PRDCH, an R2D timing acquisition signal (e.g., preamble / midamble / postamble), or a synchronization signal. A slot may be a time interval of 1 millisecond. A slot may be one slot of Orthogonal Frequency Division Multiplexing (OFDM). A slot may be a slotted-ALOHA slot. A slot may be any other time domain unit consisting of one or more symbols. A symbol may be one OFDM symbol, M chips (M is an integer greater than or equal to 1) of on-off-keying (OOK), or one modulation symbol of phase shift keying (PSK) and / or frequency shift keying (FSK). Different alternatives / options may be applied to R2D and D2R. Different alternatives / options may be applied to different device types. Different alternatives / options may be applied to different connection topologies. Different alternatives / options may be applied to different R2D channels and different D2R channels.The R2D channel may be, for example, either a PRDCH or a PHY channel for R2D control. The D2R channel may be either a PDRCH or a PHY channel for D2R control. Different alternatives / options may be applied to different R2D information or different D2R information. Also, different alternatives / options may be applied to different R2D formats or different D2R formats. Also, different alternatives / options may be applied to different R2D commands or different D2R commands. For example, different alternatives / options may be applied to any of the following. In other words, the alternatives / options applied may differ between two of the following. - R2D data - R2D control - R2D system information - R2D information triggering contention based access - D2R data - D2R control - D2R ACK / NACK response - D2R response in contention based access (Msg1 / Msg3).

[0108] <Considerations> It may be possible that one R2D TX (R2D message) triggers D2R transmissions for multiple devices. For example, a set of D2R resources (e.g., D2R time resources) may be scheduled by a single R2D message.

[0109] Fig. 12 is a diagram illustrating multiple D2R transmission triggers caused by one R2D message. Fig. 12 shows a D2R time resource set consisting of six time resources. Devices #1 to #3 transmit D2R using one or more time resources (one time resource in Fig. 12) of the D2R time resource set. A D2R time resource set may also be referred to as a D2R transmission candidate or a D2R transmission occasion.

[0110] The reader may transmit (e.g., broadcast) one R2D message, as shown by arrow A12a in Figure 12. The R2D message is the message that triggers a D2R transmission.

[0111] Devices #1 to #3 may perform D2R transmission in response to one R2D message (trigger message) from the leader. For example, devices #1 to #3 may perform D2R transmission using one time resource of the D2R time resource set, as shown by arrows A12b, A12c, and A12d in Fig. 12 .

[0112] As described above, if one R2D TX triggers multiple D2R transmissions, the subsequent R2D transmissions corresponding to each D2R transmission may be performed after the used D2R time resource, for example, after the three used D2R time resources shown in FIG.

[0113] Thus, from each device's perspective, the optimal R2D monitoring window may depend, for example, on which of the D2R time resources is used.

[0114] However, at present, it is not clear how each device determines its R2D monitoring window.

[0115] This may result in, for example, the device performing unnecessary R2D monitoring, resulting in a loss of energy for the device, and may also reduce the timing available for R2D, reducing scheduling flexibility.

[0116] In this disclosure, the following proposals 0 to 5 provide techniques that can appropriately determine the R2D monitoring window when one R2D TX triggers multiple D2R transmissions.

[0117] <Proposal 0> Proposal 0 explains the definition / device behavior. T D2R_min :T D2R_min is a parameter related to the timing (time) of R2D transmission. D2R_min indicates the start of the R2D monitoring window from D2R.D2R_max :T D2R_min is a parameter related to the timing of R2D transmission. D2R_max indicates the end of the R2D monitoring window. D2R :N D2R denotes the number of D2R time resources corresponding to the R2D signal. For example, in FIG. 12, N D2R is 6. Window definition details: R2D monitoring window is defined based on start / middle / end of R2D TX and start / middle / end of D2R TX. Device operation: The device performs R2D monitoring within the R2D monitoring window.

[0118] For example, if a device (i.e., the destination is this device) detects one (or more) R2D transmissions targeted to that device, it will terminate R2D monitoring and proceed to the next process (e.g., D2R TX).

[0119] For example, if the device does not detect a targeted R2D transmission, it may assume that the communication round (or communication session), such as the inventory / command step, has failed and proceed to an initial state, such as monitoring for an initial R2D transmission.

[0120] For example, if a device detects one or more R2D transmissions not intended for the device, it can continue monitoring or assume failure and proceed to an initial state.

[0121] <Proposal 1> In Proposal 1, the T of the R2D monitoring window D2R_min The method for determining (setting) the (value) will be explained below.

[0122] T D2R_min is determined based on the D2R resource (D2R time resource set) / device ID used. D2R_min For the determination of the following options 1a and 1b are offered:

[0123] <Proposal 1: Option 1a> T D2R_min is commanded (notified) by R2D. For example, T D2R_min is broadcast by R2D X as indicated by arrow A13a in FIG.

[0124] T by R2D D2R_min The following Alt. 1 to Alt. 4 are provided for the instruction of T. The device uses at least one of Alt. 1 to Alt. 4 to D2R_min may be determined.

[0125] <Proposal 1: Option 1a: Alt. 1> The device shall allocate T per D2R time resource based on the indicated R2D X. D2R_min Determine.

[0126] For example, Figure 13 shows a D2R time resource set consisting of six D2R time resources. D2R_min are associated with each of the six D2R time resources and are indicated by R2D X (see arrow A13a). For example, six X1, X2, X3, X4, X5, and X6 are associated with each of the six D2R time resources and are indicated by R2D X. X1, X2, X3, X4, X5, and X6 are, for example, values ​​(T D2R_min ) is shown.

[0127] For example, device #1 shown in Fig. 13 performs D2R transmission using the first D2R time resource of the D2R time resource set. Device #1 transmits D2R data using X1 indicated by the R2D X associated with the first D2R time resource. D2R_min_#1 Determine.

[0128] For example, device #2 shown in Fig. 13 performs D2R transmission using the third D2R time resource of the D2R time resource set. Device #2 performs D2R transmission using X3 indicated by the R2D X associated with the third D2R time resource. D2R_min_#2 Determine.

[0129] For example, device #3 shown in Fig. 13 performs D2R transmission using the last D2R time resource of the D2R time resource set. Device #3 performs D2R transmission using X6 indicated by the R2D X associated with the last D2R time resource. D2R_min_#3 Determine.

[0130] It should be noted that the device may determine the D2R time resource randomly or based on the device ID.

[0131] In addition, in FIG. 13, the T of the R2D monitoring window in the three devices #1 to #3 D2R_min and T D2R_max are consistent, but may be different.

[0132] <Proposal 1: Option 1a: Alt.2> For each value related to the device ID of the device, D2R_min The value of T is indicated by R2D X. The device will then determine the T based on the value associated with the device ID. D2R_min Determine.

[0133] For example, T associated with device ID 1 D2R_min_#1 , T associated with device ID 2 D2R_min_#2 , and T associated with device ID3 D2R_min_#3 is commanded by R2D X.

[0134] In this case, for example, device #1 with device ID 1 shown in FIG. 13 has a T associated with device ID 1, which is indicated by R2D X. D2R_min_#1 By R2D Watch Window T D2R_min_#1 Determine.

[0135] For example, device #2 with device ID 2 shown in FIG. 13 has a T associated with device ID 2, indicated by R2D X. D2R_min_#2 By R2D Watch Window T D2R_min_#2 Determine.

[0136] For example, device #3 with device ID 3 shown in FIG. 13 has a T associated with device ID 3, which is indicated by R2D X. D2R_min_#3 By R2D Watch Window T D2R_min_#3 Determine.

[0137] The device may determine the D2R time resource randomly or based on the device ID. The device may determine the T of the R2D monitoring window from the value indicated by R2D X based on the D2R time resource determined randomly or based on the device ID.D2R_min may be determined.

[0138] Also, N D2R Let be the number of time resources in the D2R time resource set, then the value associated with the device ID of the device is N D2R For example, in the example of FIG. 13, the value associated with the device ID of the device may be N D2R In this case, the device may be determined based on the device ID and N D2R Modulo operation with (Device ID is N D2R The value associated with the device ID may be selected from the six values ​​indicated by R2D X by the remainder of the division by R2D X.

[0139] <Proposal 1: Option 1a: Alt. 3> One value and a value for each D2R time resource are indicated by R2D X. The device determines the T of the R2D monitoring window based on the one value indicated by R2D X and the value for each D2R time resource. D2R_min The value for each D2R time resource may be an offset value from the single value.

[0140] For example, device #1 shown in FIG. 13 determines the T of the R2D monitoring window based on one value indicated by R2D X and the value X1 associated with the first D2R time resource in the D2R time resource set. D2R_min Determine.

[0141] For example, device #2 shown in FIG. 13 determines the T of the R2D monitoring window based on one value indicated by R2D X and the value X3 associated with the third D2R time resource in the D2R time resource set. D2R_min Determine.

[0142] For example, device #3 shown in FIG. 13 determines the T of the R2D monitoring window based on one value indicated by R2D X and the value X6 associated with the last D2R time resource in the D2R time resource set. D2R_min Determine.

[0143] Alternatively, one value and a value for each device ID (a value associated with the device ID) are indicated by R2D X. The device determines the T of the R2D monitoring window based on the one value indicated by R2D X and the value for each device ID. D2R_min The value for each device ID may be an offset value from the single value.

[0144] For example, device #1 shown in FIG. 13 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value associated with device ID 1 of device #1. D2R_min Determine.

[0145] For example, device #2 shown in FIG. 13 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value associated with device ID2 of device #2. D2R_min Determine.

[0146] For example, device #3 shown in FIG. 13 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value associated with device ID 3 of device #3. D2R_min Determine.

[0147] <Proposal 1: Option 1a: Alt.4> A common value between device / D2R time resources is indicated by R2D X. The device adjusts the T of the R2D monitoring window based on the common value indicated by R2D X. D2R_min Determine.

[0148] The device may determine the D2R time resource randomly or based on the device ID. The device may determine the T of the R2D monitoring window based on one common value indicated by R2D X from the D2R time resource determined randomly or based on the device ID. D2R_min may be determined.

[0149] <Proposal 1: Option 1b> T D2R_min The value for T is a fixed value. D2R_min If the value for is a fixed value, the device uses at least one of Alt.1 to Alt.4 to D2R_minmay be determined.

[0150] <Proposal 1: Option 1b: Alt.1> T D2R_min The value for is fixed for each D2R time resource of the D2R time resource set.

[0151] For example, Fig. 13 shows a D2R time resource set consisting of six D2R time resources. Six fixed values, X1, X2, X3, X4, X5, and X6, are set (e.g., set in advance) for each of the six D2R time resources. The device uses the fixed values ​​set for the D2R time resource to be used in the D2R time resource set to determine the T of the R2D monitoring window. D2R_min Determine.

[0152] <Proposal 1: Option 1b: Alt.2> T D2R_min The value for is a fixed value for each value associated with the device ID of the device.

[0153] For example, device #1 with device ID 1 shown in FIG. 13 may set the T value of the R2D monitoring window based on a fixed value (e.g., a preset value) associated with device ID 1. D2R_min_#1 Determine.

[0154] The number of fixed values ​​associated with the device ID of a device is N D2R For example, in the example of FIG. 13, the number of fixed values ​​associated with the device ID of a device may be six. In this case, the device may have a device ID and N D2R Modulo operation with (Device ID is N D2R By dividing by (the remainder), N D2R Of these fixed values, the fixed value associated with device ID 1 may be selected.

[0155] <Proposal 1: Option 1b: Alt.3> T D2R_min The value for N D2R The device is a fixed value for each value of N D2R Based on N D2R A fixed value is determined (selected) based on the determined fixed value, and T of the R2D monitoring window is set based on the determined fixed value. D2R_min Determine, for example, N D2R T when = 4D2R_min And, N D2R T when = 6 D2R_min and the device is N D2R Based on the number of T D2R_min Determines whether to apply

[0156] <Proposal 1: Option 1b: Alt.4> A common fixed value is set between device / D2R time resources. Devices will determine the T of the R2D monitoring window based on a common fixed value (e.g., a preset value). D2R_min Determine.

[0157] The device may determine the D2R time resource randomly or based on the device ID. The device may determine the T of the R2D monitoring window based on a common fixed value from the D2R time resource determined randomly or based on the device ID. D2R_min may be determined.

[0158] <Proposal 1: Summary> As explained above, the R2D that triggers the D2R transmission of multiple devices has an R2D monitoring window (T D2R_min This allows the device to properly determine the R2D monitoring window.

[0159] As explained above, the R2D monitoring window (T D2R_min ) is set to a fixed value. This allows the device to appropriately determine the R2D monitoring window.

[0160] <Proposal 2> In Proposal 2, the T of the R2D monitoring window D2R_min The criteria will be explained.

[0161] T D2R_min The reference point for is based on common timing between the devices. The reference point is the R2D monitoring window [T D2R_min ,T D2R_max] is the "zero" point for determining the common timing between devices. The common timing between devices may be the start, end, or timing between the start and end of the D2R time resource set corresponding to the most recent R2D signal. The common timing between devices may be the start, end, or timing between the start and end of R2D X.

[0162] For example, the reference point may be the end timing of a D2R time resource set, which may be a common timing between devices, as shown by arrow A14a in FIG.

[0163] T D2R_min For the determination of the following options 2a and 2b are offered:

[0164] <Proposal 2: Option 2a> A reference point is indicated by R2D X. For example, the end timing (value) of the D2R time resource set (see arrow A14a in FIG. 14), which can be a common timing between devices, is indicated by R2D X as a reference point. Devices #1 to #3 determine the T of the R2D monitoring window based on the indicated reference point. D2R_min Determine.

[0165] T from the reference point D2R_min For the determination of this, the above <Proposal 1: Option 1a> may be applied.

[0166] <Proposal 2: Option 2b> The reference point is a fixed value. For example, the end timing (value) of the D2R time resource set (see arrow A14a in Fig. 14), which can be a common timing between devices, is set (e.g., preset) as a fixed value.

[0167] T from the reference point D2R_min For the determination of this, the above <Proposal 1: Option 1b> may be applied.

[0168] The fixed value may be set for each message type, each content, or each device type.

[0169] <Proposal 2: Summary> As explained above, the R2D that triggers the D2R transmission of multiple devices has an R2D monitoring window (T D2R_min This allows the device to properly determine the R2D monitoring window.

[0170] As explained above, the R2D monitoring window (T D2R_min ) is set to a fixed value, allowing the device to properly determine the R2D monitoring window.

[0171] <Proposal 3> In Proposal 3, the T of the R2D monitoring window D2R_max The method for determining (value) will be explained below.

[0172] T D2R_max is determined based on the D2R resource (D2R time resource set) / device ID used. D2R_max For the determination of the following options 3a and 3b are offered:

[0173] <Proposal 3: Option 3a> T D2R_max is commanded (notified) by R2D. For example, T D2R_max is broadcast by R2D X as indicated by arrow A15a in FIG.

[0174] T by R2D D2R_max The following Alt. 1 to Alt. 4 are provided for the instruction of T. The device uses at least one of Alt. 1 to Alt. 4 to D2R_max may be determined.

[0175] <Proposal 3: Option 3a: Alt. 1> The device shall allocate T per D2R time resource based on the indicated R2D X. D2R_max Determine.

[0176] For example, Figure 15 shows a D2R time resource set consisting of six D2R time resources. D2R_maxare associated with each of the six D2R time resources and are indicated by R2D X (see arrow A15a). For example, six Y1, Y2, Y3, Y4, Y5, and Y6 are associated with each of the six D2R time resources and are indicated by R2D X. Y1, Y2, Y3, Y4, Y5, and Y6 are, for example, values ​​(T D2R_max ) is shown.

[0177] For example, device #1 shown in Fig. 15 performs D2R transmission using the first D2R time resource of the D2R time resource set. Device #1 transmits the T2R of the R2D monitoring window using Y1 indicated by R2D X associated with the first D2R time resource. D2R_max_#1 Determine.

[0178] For example, device #2 shown in Fig. 15 performs D2R transmission using the third D2R time resource of the D2R time resource set. Device #2 performs D2R transmission using Y3 indicated by R2D X associated with the third D2R time resource. D2R_max_#2 Determine.

[0179] For example, device #3 shown in Fig. 15 performs D2R transmission using the last D2R time resource of the D2R time resource set. Device #3 transmits D2R data using Y6 indicated by R2D X, which is associated with the last D2R time resource. D2R_max_#3 Determine.

[0180] It should be noted that the device may determine the D2R time resource randomly or based on the device ID.

[0181] In FIG. 15, the T of the R2D monitoring window for the three devices #1 to #3 D2R_max In FIG. 15, the T of the R2D monitoring window in the three devices #1 to #3 are the same. D2R_min are different, but they may be the same.

[0182] <Proposal 3: Option 3a: Alt.2> For each value related to the device ID of the device, D2R_minThe value of T is indicated by R2D X. The device will then determine the T based on the value associated with the device ID. D2R_max Determine.

[0183] For example, T associated with device ID 1 D2R_max_#1 , T associated with device ID 2 D2R_max_#2 , and T associated with device ID3 D2R_max_#3 is commanded by R2D X.

[0184] In this case, for example, device #1 with device ID 1 shown in FIG. 15 has a T associated with device ID 1, which is indicated by R2D X. D2R_max_#1 By R2D Watch Window T D2R_max_#1 Determine.

[0185] For example, device #2 with device ID 2 shown in FIG. 15 has a T associated with device ID 2, indicated by R2D X. D2R_max_#2 By R2D Watch Window T D2R_max_#2 Determine.

[0186] For example, device #3 with device ID 3 shown in FIG. 15 has a T associated with device ID 3, which is indicated by R2D X. D2R_max_#3 By R2D Watch Window T D2R_max_#3 Determine.

[0187] The device may determine the D2R time resource randomly or based on the device ID. The device may determine the T of the R2D monitoring window from the value indicated by R2D X based on the D2R time resource determined randomly or based on the device ID. D2R_max may be determined.

[0188] Also, N D2R Let be the number of time resources in the D2R time resource set, then the value associated with the device ID of the device is N D2R For example, in the example of FIG. 15, the value associated with the device ID of the device may be N D2R In this case, the device may be determined based on the device ID and N D2R Modulo operation with (Device ID is N D2RThe value associated with the device ID may be selected from the six values ​​indicated by R2D X by the remainder of the division by R2D X.

[0189] <Proposal 3: Option 3a: Alt. 3> One value and a value for each D2R time resource are indicated by R2D X. The device determines the T of the R2D monitoring window based on the one value indicated by R2D X and the value for each D2R time resource. D2R_max The value for each D2R time resource may be an offset value from the single value.

[0190] For example, device #1 shown in FIG. 15 determines the T of the R2D monitoring window based on one value indicated by R2D X and the value Y1 associated with the first D2R time resource in the D2R time resource set. D2R_max Determine.

[0191] For example, device #2 shown in FIG. 15 determines the T of the R2D monitoring window based on one value indicated by R2D X and the value Y3 associated with the third D2R time resource in the D2R time resource set. D2R_max Determine.

[0192] For example, device #3 shown in FIG. 15 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value Y6 associated with the last D2R time resource in the D2R time resource set. D2R_max Determine.

[0193] Alternatively, one value and a value for each device ID (a value associated with the device ID) are indicated by R2D X. The device determines the T of the R2D monitoring window based on the one value indicated by R2D X and the value for each device ID. D2R_max The value for each device ID may be an offset value from the single value.

[0194] For example, device #1 shown in FIG. 15 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value associated with device ID 1 of device #1. D2R_max Determine.

[0195] For example, device #2 shown in FIG. 15 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value associated with device ID2 of device #2. D2R_max Determine.

[0196] For example, device #3 shown in FIG. 15 determines the T value of the R2D monitoring window based on one value indicated by R2D X and the value associated with device ID 3 of device #3. D2R_max Determine.

[0197] <Proposal 3: Option 3a: Alt. 4> A common value between device / D2R time resources is indicated by R2D X. The device adjusts the T of the R2D monitoring window based on the common value indicated by R2D X. D2R_max Determine.

[0198] The device may determine the D2R time resource randomly or based on the device ID. The device may determine the T of the R2D monitoring window based on one common value indicated by R2D X from the D2R time resource determined randomly or based on the device ID. D2R_max may be determined.

[0199] <Proposal 3: Option 3b> T D2R_max The value for T is a fixed value. D2R_max If the value for is a fixed value, the device uses at least one of Alt.1 to Alt.4 to D2R_max may be determined.

[0200] <Proposal 3: Option 3b: Alt.1> T D2R_max The value for is fixed for each D2R time resource of the D2R time resource set.

[0201] For example, Fig. 15 shows a D2R time resource set consisting of six D2R time resources. Six fixed values, Y1, Y2, Y3, Y4, Y5, and Y6, are set (e.g., set in advance) for each of the six D2R time resources. The device uses the fixed values ​​set for the D2R time resource to be used in the D2R time resource set to determine the T of the R2D monitoring window. D2R_max Determine.

[0202] <Proposal 3: Option 3b: Alt.2> T D2R_max The value for is a fixed value for each value associated with the device ID of the device.

[0203] For example, device #1 with device ID 1 shown in FIG. 15 may be configured to receive T2D monitoring window data based on a fixed value (e.g., a preset value) associated with the device ID. D2R_max_#1 Determine.

[0204] The number of fixed values ​​associated with the device ID of a device is N D2R For example, in the example of FIG. 15, the number of fixed values ​​associated with the device ID of a device may be six. In this case, the device may have a device ID and N D2R Modulo operation with (Device ID is N D2R By dividing by (the remainder), N D2R Of these fixed values, the fixed value associated with device ID 1 may be selected.

[0205] <Proposal 3: Option 3b: Alt.3> T D2R_max The value for N D2R The device is a fixed value for each value of N D2R Based on N D2R A fixed value is determined (selected) based on the determined fixed value, and T of the R2D monitoring window is set based on the determined fixed value. D2R_max Determine, for example, N D2R T when = 4 D2R_max And, N D2R T when = 6 D2R_max and the device is N D2R Based on the number of T D2R_max Determines whether to apply

[0206] <Proposal 3: Option 3b: Alt. 4> A common fixed value is set between device / D2R time resources. The device will determine the T of the R2D monitoring window based on a common fixed value (e.g., a preset value). D2R_max Determine.

[0207] The device may determine the D2R time resource randomly or based on the device ID. The device may determine the T of the R2D monitoring window based on a common fixed value from the D2R time resource determined randomly or based on the device ID. D2R_max may be determined.

[0208] <Proposal 3: Summary> As explained above, the R2D that triggers the D2R transmission of multiple devices has an R2D monitoring window (T D2R_max This allows the device to properly determine the R2D monitoring window.

[0209] As explained above, the R2D monitoring window (T D2R_max ) is set to a fixed value. This allows the device to appropriately determine the R2D monitoring window.

[0210] <Proposal 4> In Proposal 4, the T of the R2D monitoring window D2R_max The criteria will be explained.

[0211] T D2R_max The reference point for D2R_min It may be determined based on a similar method to that of (see Proposal 2 above). D2R_max The reference point for D2R_min It may be the same as or different from the reference point of

[0212] <Proposal 4: Summary> As explained above, the R2D that triggers the D2R transmission of multiple devices has an R2D monitoring window (T D2R_max This allows the device to properly determine the R2D monitoring window.

[0213] As explained above, the R2D monitoring window (T D2R_max ) is set to a fixed value, allowing the device to properly determine the R2D monitoring window.

[0214] <Proposal 5> Proposal 5 describes the R2D monitoring window after receiving a (previous) R2D.

[0215] After receiving an R2D, another R2D may be received (see, for example, dotted frames A16a and A16b in FIG. 16 ). In this case, the device determines the R2D monitoring window for the subsequent R2D based on the previous R2D. For example, based on the response shown in dotted frame A16a in FIG. 16 , the device determines the R2D monitoring window for the R2D data shown in dotted frame A16b in FIG. 16 (see double arrow A16c in FIG. 16 ) following that response.

[0216] In this case, D2R described in each of the above proposals is replaced with R2D. For example, D2R described in Figures 13, 14, and 15 is replaced with R2D.

[0217] Note that the R2D monitoring window for receiving an R2D subsequently after receiving an R2D may be determined based on the most recent D2R (i.e., it may be determined based on the above suggestions 1 to 4). For example, the R2D monitoring window shown by the double-headed arrow A16c in Fig. 16 may be determined based on the A-IoT Msg3 (D2R) shown in the dotted frame A16d in Fig. 16.

[0218] <Proposal 5: Summary> As described above, when receiving an R2D after another R2D, the device determines the R2D monitoring window for the subsequent R2D based on the previous R2D, which allows the device to appropriately determine the R2D monitoring window.

[0219] <Configuration of Base Station> Fig. 17 is a block diagram showing an example of the configuration of a base station 10 according to an embodiment. The base station 10 includes, for example, a transmitting unit 101, a receiving unit 102, and a control unit 103. The base station 10 communicates with a device 20 (see Fig. 18) wirelessly. The base station 10 may be an intermediate node or a CW node.

[0220] The transmitter 101 transmits a downlink (DL) signal to the device 20. For example, the transmitter 101 transmits the DL signal under the control of the controller 103.

[0221] The DL signal may include, for example, a downlink data signal and control information (e.g., DCI (Downlink Control Information)). The DL signal may also include information indicating scheduling related to signal transmission of the device 20 (e.g., an UL grant). The DL signal may also include control information of higher layers (e.g., control information of RRC (Radio Resource Control)). The DL signal may also include a reference signal.

[0222] The channels used for transmitting DL signals include, for example, a data channel and a control channel. For example, the data channel may include a PDSCH (Physical Downlink Shared Channel), and the control channel may include a PDCCH (Physical Downlink Control Channel). For example, the base station 10 transmits control information to the device 20 using the PDCCH and transmits downlink data signals using the PDSCH.

[0223] The reference signal included in the DL signal may include at least one of, for example, a Demodulation Reference Signal (DMRS), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as the DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0224] The receiving unit 102 receives an uplink (UL) signal transmitted from the device 20. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103.

[0225] The control unit 103 controls the communication operations of the base station 10, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102. For example, the control unit 103 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the reception unit 102 and / or the transmission unit 101).

[0226] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0227] For example, the control unit 103 allocates resources (or channels) used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on signals (e.g., data and control information, etc.) received from the device 20 and / or data and control information, etc. acquired from a higher layer. Information on the allocated resources may be included in control information transmitted to the device 20.

[0228] The control unit 103 configures PUCCH resources as an example of allocation of resources used for transmitting and receiving UL signals. Information related to the configuration of the PUCCH, such as a PUCCH cell timing pattern (PUCCH configuration information), may be notified to the device 20 by RRC.

[0229] Here, the transmitting unit 101 may transmit a trigger signal that triggers the transmission of uplink signals from a plurality of devices.

[0230] The control unit 103 may include, in the trigger signal, information for determining a window for multiple devices including the device 20 to monitor a downstream signal such as R2D.

[0231] <Device Configuration> Fig. 18 is a block diagram showing an example of the configuration of a device 20 according to an embodiment. The device 20 is a device with lower complexity than a Narrow Band-Internet of Things (NB-IoT) device, for example, an A-IoT UE. The device 20 may be considered as a device that receives power through energy harvesting. For example, the device 20 may be considered as a device that receives power through a CW supplied from a base station 10.

[0232] The device 20 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The device 20 communicates with, for example, the base station 10 wirelessly. The device 20 may be, for example, an A-IoT device.

[0233] The receiving unit 201 receives a DL signal transmitted from the base station 10. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

[0234] The transmitting unit 202 transmits the UL signal to the base station 10. For example, the transmitting unit 202 transmits the UL signal under the control of the control unit 203.

[0235] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI), information related to the processing capabilities of the device 20 (e.g., UE capability), and a reference signal.

[0236] The channels used for transmitting UL signals include, for example, a data channel and a control channel. For example, the data channel includes a PUSCH (Physical Uplink Shared Channel), and the control channel includes a PUCCH (Physical Uplink Control Channel). For example, the device 20 receives control information from the base station 10 using the PUCCH and transmits uplink data signals using the PUSCH.

[0237] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRS, and PRS. For example, the reference signals such as DMRS and PTRS are used for demodulating the uplink data signal and are transmitted using an uplink channel (for example, PUSCH).

[0238] The control unit 203 controls the communication operations of the device 20 , including the reception processing in the receiving unit 201 and the transmission processing in the transmitting unit 202 .

[0239] For example, the control unit 203 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 202. Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the upper layer.

[0240] For example, the control unit 203 controls transmission of information to be fed back to the base station 10. The information to be fed back to the base station 10 may include, for example, HARQ-ACK, channel state information (CSI), or a scheduling request (SR). The information to be fed back to the base station 10 may be included in UCI. The UCI is transmitted in the resources of the PUCCH.

[0241] The control unit 203 sets PUCCH resources based on configuration information (for example, configuration information such as a PUCCH cell timing pattern notified by RRC and / or DCI) received from the base station 10. The control unit 203 determines the PUCCH resources to be used for transmitting information to be fed back to the base station 10. Under the control of the control unit 203, the transmission unit 202 transmits the information to be fed back to the base station 10 in the PUCCH resources determined by the control unit 203.

[0242] Note that the channel used for transmitting the DL signal and the channel used for transmitting the UL signal are not limited to the above-mentioned examples. For example, the channel used for transmitting the DL signal and the channel used for transmitting the UL signal may include a Random Access Channel (RACH) and a Physical Broadcast Channel (PBCH). The RACH may be used to transmit Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI), for example.

[0243] Here, the receiving unit 201 may receive a trigger signal that triggers transmission of upstream signals from multiple devices. The trigger signal may be R2D, and the upstream signal may be D2R.

[0244] After transmitting an upstream signal based on reception of a trigger signal, the control unit 203 may determine a window for monitoring a downstream signal based on information included in the trigger signal. The information included in the trigger signal may be R2D X. The term information may be used interchangeably with the term parameter. The downstream signal may be R2D. The window may be an R2D monitoring window. The control unit 203 determines the T of the R2D monitoring window based on the information included in the trigger signal. D2R_min / T D2R_max may be determined.

[0245] The information included in the trigger signal may be associated with each resource in a resource set for transmitting an uplink signal. The control unit 203 may determine the window based on the information associated with the resource from which the device 20 transmits an uplink signal. The resource set may be a D2R time resource set.

[0246] The information included in the trigger signal may be associated with identifiers of multiple devices. The control unit 203 may determine the window based on the information associated with the identifiers of the devices 20.

[0247] The information included in the trigger signal may include a single value that is common to multiple devices. The control unit 203 may determine the window based on the value included in the trigger signal.

[0248] The information included in the trigger signal may include information regarding a reference point for determining the start and / or end of a window, and the control unit 203 may determine the start and / or end of the window based on the reference point.

[0249] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0250] <Hardware Configuration, etc.> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0251] Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0252] For example, a base station, a device, 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. 19 is a diagram showing an example of the hardware configuration of a base station and a device according to the embodiment. The above-described base station 10 and device 20 may be physically configured as a computer 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.

[0253] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the device 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0254] Each function in the base station 10 and the device 20 is realized by loading specified software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory 1002 and storage 1003.

[0255] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 103 and control unit 203 may be realized by the processor 1001.

[0256] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of 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 103 of the base station 10 and the control unit 203 of the device 20 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be used for other functional blocks. While the above-described various processes have been described as being executed by one 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 also be transmitted from a network via a telecommunications line.

[0257] The memory 1002 is a computer-readable recording medium and may be configured by, for example, at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0258] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, 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 (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0259] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter 101, receiver 102, receiver 201, transmitter 202, etc. may be realized by the communication device 1004.

[0260] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0261] 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.

[0262] Furthermore, the base station 10 and the device 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), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0263] <Notification of Information, Signaling> Notification of information is not limited to the embodiments described in the present disclosure and may be performed using other methods. For example, notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), 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), System Information Block (SIB))), other signals, or a combination thereof. Furthermore, RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0264] <Applicable Systems> The embodiments described in the present disclosure are applicable to LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 (WiMAX (registered trademark The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of LTE and / or LTE-A with 5G).

[0265] <Processing Procedures, etc.> The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be rearranged unless inconsistent. 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.

[0266] <Operation of Base Station> In the present disclosure, specific operations described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0267] <Direction of Input / Output> Information, etc. (see <Information, Signal>) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input / output via multiple network nodes.

[0268] <Handling of Input / Output Information, etc.> Input / output information, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, etc. may be overwritten, updated, or added. Output information, etc. may be deleted. Input information, etc. may be sent to another device.

[0269] <Determination method> The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0270] <Variations of Aspects, etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation. In addition, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0271] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0272] <Software> Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0273] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0274] Information, Signals, etc., described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0275] Note that terms described in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0276] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0277] <Parameter and Channel Names> Furthermore, the information, parameters, and the like described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0278] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0279] <Base Station> In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0280] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a remote radio head (RRH)). The terms "cell" or "sector" refer to part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0281] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0282] Mobile Station In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," and the like may be used interchangeably.

[0283] A mobile station may also be referred to by those skilled in the art 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, or some other suitable terminology.

[0284] <Base Station / Mobile Station> At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0285] Furthermore, the base station in the present disclosure may be read as a terminal. For example, the 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)). In this case, the device 20 may be configured to have 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, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0286] Similarly, the term "terminal" in the present disclosure may be interpreted as a base station, in which case the base station 10 may be configured to have the functions of the device 20 described above.

[0287] Fig. 20 shows an example configuration of a vehicle 2001. As shown in Fig. 20, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0288] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0289] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0290] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0291] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 2012 provides various types of multimedia information and multimedia services to the occupants of the vehicle 2001 by using information acquired from external devices via the communication module 2013, etc.

[0292] The information service unit 2012 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0293] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0294] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0295] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0296] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021 to 2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 to 2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0297] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)).

[0298] Furthermore, the communication module 2013 stores various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0299] <Meaning and Interpretation of Terms> As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching a table, database, or other data structure), ascertaining something that is considered to be a "judging" or "determining," and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like that are considered to be a "judging" or "determining." Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0300] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0301] <Reference Signal> A reference signal can also be abbreviated as RS (Reference Signal), and may also be called a pilot depending on the applicable standard.

[0302] <Meaning of "based on"> As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0303] "First," "Second" Any reference to an element using designations such as "first," "second," etc., used in this disclosure 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 precede the second element in some way.

[0304] <Means> The "means" in the configuration of each device above may be replaced with "section," "circuit," "device," etc.

[0305] Open Format: When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0306] <Time Units such as TTI, Frequency Units such as RB, and Radio Frame Configuration> A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0307] Numerology may be a communication parameter that applies to the transmission and / or reception of a signal or channel, and may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0308] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol). A slot may be a time unit based on numerology.

[0309] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0310] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0311] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0312] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0313] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0314] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0315] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0316] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0317] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0318] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0319] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0320] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0321] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0322] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0323] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0324] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.

[0325] <Maximum Transmit Power> The "maximum transmit power" in the present disclosure may refer to the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0326] Articles 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 plural.

[0327] <"Different"> In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0328] One aspect of the present disclosure is useful in wireless communication systems.

[0329] 10 Base station 20 Device 101, 202 Transmitter 102, 201 Receiver 103, 203 Controller

Claims

1. A device powered by energy harvesting, comprising: a receiver that receives a signal that triggers the transmission of upstream signals from multiple devices; and a controller that transmits an upstream signal based on the reception of the signal, and then determines a window for monitoring downstream signals based on information contained in the signal.

2. The device according to claim 1, wherein the information is associated with each resource of a resource set from which an uplink signal is transmitted, and the control unit determines the window based on the information associated with the resource from which the device transmits an uplink signal.

3. The device according to claim 1, wherein the information is associated with identifiers of the plurality of devices, and the control unit determines the window based on the information associated with the identifiers of the devices.

4. The device according to claim 1, wherein the information includes one value common to the plurality of devices, and the control unit determines the window based on the value.

5. The device of claim 1, wherein the information includes information regarding a reference point for determining the start and / or end of the window, and the control unit determines the start and / or end of the window based on the reference point.

6. A communication method for a device powered by energy harvesting, the device receiving a signal that triggers transmission of upstream signals from multiple devices, and after transmitting the upstream signal based on the reception of the signal, determining a window for monitoring downstream signals based on information contained in the signal.

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