Message transmission method, reader-writer device, internet of things device, communication device, and storage medium

Abstract

The application relates to a message transmission method, a reader-writer device, an Internet of Things device, a communication device and a storage medium. The method is applied to the reader-writer device and comprises the following steps: sending an R2D message to the Internet of Things device, wherein the R2D message comprises first related information for indicating a D2R transmission process and / or second related information for indicating the R2D message transmission process; and receiving a D2R message sent by the Internet of Things device, wherein the D2R message comprises third related information for indicating the D2R transmission process. The method can realize seamless connection of an end-to-end communication flow under a new architecture.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a message transmission method, a reader / writer device, an Internet of Things device, a communication device, and a storage medium. Background Technology

[0002] Passive IoT, with its focus on green and low-carbon development, is a promising low-power IoT technology. Technologies such as wireless power supply and backscatter communication can reduce the reliance of passive IoT devices on batteries, providing a technological foundation for the development of new battery-free IoT devices.

[0003] 3GPP defines a new paradigm for the form and access process of Ambient Internet of Things (AIoT) terminal devices. Since IoT devices need to communicate with base stations or relay nodes, existing configuration methods for uplink and downlink control information are no longer suitable for information reporting and resource allocation by IoT devices in this new network topology. Therefore, it is urgent to propose a method applicable to the new network topology for information reporting and resource allocation by IoT devices. Summary of the Invention

[0004] This application provides a message transmission method, a reader / writer device, an Internet of Things device, a communication device, and a storage medium, which are capable of...

[0005] Firstly, a message transmission method is provided, applied to a reader / writer device, including:

[0006] Sending an R2D message to an IoT device, the R2D message including: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process;

[0007] Receive D2R messages sent by IoT devices, the D2R messages including third relevant information for indicating the D2R transmission process.

[0008] Secondly, a message transmission method is provided for use in Internet of Things (IoT) devices, including:

[0009] Receive an R2D message sent by a reader / writer device, the R2D message including: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process;

[0010] A D2R message is sent to the receiving reader device, the D2R message including third relevant information for indicating the D2R transmission process.

[0011] Thirdly, a reader / writer device is provided, comprising:

[0012] A sending module is used to send R2D messages to IoT devices. The R2D messages include: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process.

[0013] A receiving module is used to receive D2R messages sent by IoT devices, the D2R messages including third relevant information for indicating the D2R transmission process.

[0014] Fourthly, an Internet of Things (IoT) device is provided, comprising:

[0015] The receiving module is configured to receive R2D messages sent by the reader device, wherein the R2D messages include: first related information for indicating the D2R transmission process, and / or, second related information for indicating the R2D message transmission process;

[0016] The sending module is configured to send a D2R message to the receiving reader device, the D2R message including third relevant information for indicating the D2R transmission process.

[0017] Fifthly, a communication device is provided, comprising: a memory, a transceiver, and a processor.

[0018] The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute the steps of the method as described in the first or second aspect.

[0019] A sixth aspect provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in the first or second aspect.

[0020] In a seventh aspect, a chip is provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is running, implement the steps of the method described in the first or second aspect.

[0021] Eighthly, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the steps of the method described in the first or second aspect.

[0022] In the aforementioned message transmission method, the reader / writer device can send R2D messages to IoT devices. The R2D messages include: first relevant information indicating the D2R transmission process, and / or second relevant information indicating the R2D message transmission process. The reader / writer device can also receive D2R messages sent by IoT devices, which include third relevant information indicating the D2R transmission process. This scheme, through the interactive design of R2D and D2R messages, can adapt to the new network architecture of base stations / relay nodes and IoT devices in 3GPP IoT. Specifically, the first relevant information in the R2D message can dynamically indicate the data reported by the IoT device, while the second relevant information can adjust the parameter configuration of the IoT device receiving instructions from the reader / writer device. When the IoT device sends back a D2R message, the third relevant information can synchronously transmit the transmission status of the current data packet, enabling the reader / writer device to dynamically optimize resource configuration. This bidirectional message-based interaction mechanism can replace the traditional fixed resource configuration mode and flexibly cope with new networking scenarios such as multi-hop relays and dense device access. For example, when a device accesses through a relay node, the second relevant information in the R2D message can be adapted to the relay forwarding rules, while the third relevant information in the D2R message can transmit the device status across nodes, ultimately achieving seamless connection of the end-to-end communication process under the new architecture. Attached Figure Description

[0023] Figure 1 This is an application environment diagram of a message transmission method in one embodiment;

[0024] Figure 2 This is an application environment diagram of another message transmission method in one embodiment;

[0025] Figure 3 This is a flowchart illustrating a message transmission method in one embodiment;

[0026] Figure 4 This is a flowchart illustrating another message transmission method in one embodiment;

[0027] Figure 5A This is a schematic diagram illustrating the process of generating feedback information in one embodiment.

[0028] Figure 5B A schematic diagram illustrating the process of generating another type of feedback information in one embodiment;

[0029] Figure 6A This is a schematic diagram illustrating the process of an intermediate node sending data to a base station or providing feedback information about AIoT transmission in one embodiment.

[0030] Figure 6BThis is a schematic diagram illustrating the process of another intermediate node sending data to the base station or providing feedback information about AIoT transmission in one embodiment;

[0031] Figure 7 This is a structural block diagram of a reader / writer device in one embodiment;

[0032] Figure 8 This is a structural block diagram of an IoT device in one embodiment;

[0033] Figure 9 This is an internal structure diagram of a communication device in one embodiment. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] In this embodiment, the reader device may include: an access network device (such as a base station), or a relay node. The relay node may be a terminal device.

[0036] Figure 1 This is an application environment diagram of a message transmission method provided in an embodiment of this application. For example... Figure 1 As shown, this scenario includes an IoT device 100 and a base station 200. The base station 200 can send R2D messages to the IoT device 100 and receive D2R messages sent by the IoT device 100. The R2D message includes first relevant information indicating the D2R transmission process, and / or second relevant information indicating the R2D message transmission process; the D2R message includes third relevant information indicating the D2R transmission process.

[0037] Figure 2 This is an application environment diagram of a message transmission method provided in an embodiment of this application. For example... Figure 2 As shown, this scenario includes: an IoT device 100, a base station 200, and a relay node 300. The relay node 300 can send R2D messages to the IoT device 100 and receive D2R messages sent by the IoT device 100. Furthermore, the relay node 300 can also receive a third message sent by the base station 200 and send a fourth message to the base station 200 based on fourth relevant information. The third message includes fourth relevant information indicating that the relay node 300 communicates with the base station 200 and / or with the IoT device 100; the fourth message includes fifth relevant information providing feedback on the communication between the relay node 300 and the base station 200 and / or with the IoT device 100.

[0038] In this embodiment, the base station can be a base station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNodeB) in LTE, or a base station in a 5G network, etc., and is not limited thereto.

[0039] In this embodiment, the terminal device can be a wireless terminal, which can be a device that provides voice and / or other service data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device. These exchange voice and / or data with the radio access network. The wireless terminal can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, access terminal, user terminal, user agent, or user device or user equipment, without limitation herein.

[0040] In this embodiment, the IoT device can be an environmental IoT device. This IoT device can be an IoT terminal that operates without a built-in power source (such as a battery), and it achieves data transmission with base stations or relay nodes through backscatter communication or environmental energy harvesting technology (such as radio frequency power supply). Such devices can be applied to low-power scenarios such as asset tracking and environmental monitoring, and can flexibly connect to base stations and relay nodes in new network architectures.

[0041] 3GPP defines a new paradigm for the form and access process of Ambient IoT (IoT) terminal devices. IoT devices need to communicate with base stations or relay nodes. Before this new network topology, existing configuration methods for uplink and downlink control information are no longer suitable for information reporting and resource allocation by IoT devices in the new network topology. Therefore, it is urgent to propose a method suitable for the new network topology to achieve information reporting and resource allocation for IoT devices.

[0042] The message transmission method provided in this application, through the interactive design of R2D and D2R messages, can adapt to the new network architecture of base stations / relay nodes and IoT devices in 3GPP IoT, and ultimately achieve seamless connection of end-to-end communication processes under the new architecture.

[0043] In this embodiment of the application, time-frequency resources may include: time-domain resources and / or, frequency-domain resources.

[0044] It should be noted that the beneficial effects or technical problems solved by the embodiments of this application are not limited to this one, but may also be other implicit or related problems. For details, please refer to the description of the embodiments below.

[0045] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0046] In one embodiment, such as Figure 3 The diagram illustrates a message transmission method, including the following steps:

[0047] 301. The reader device sends a Reader to Device (R2D) message to the IoT device.

[0048] Correspondingly, IoT devices receive R2D messages sent by reader devices.

[0049] In some embodiments, the R2D message includes: first relevant information for indicating the D2R transmission process.

[0050] In some embodiments, the R2D message includes: a second relevant information for indicating the R2D message transmission process.

[0051] In some embodiments, the R2D message includes: the first relevant information and the second relevant information mentioned above.

[0052] In some embodiments, the indication of the first relevant information and / or the second relevant information supports, but is not limited to, at least one of the following:

[0053] (1) Physical layer information; wherein, physical layer information includes: control information, and / or, data information; wherein, the control information indication includes: the content indication of the control information, and / or, the format indication of the control information; the format of the control information is scrambled using different Cyclic Redundancy Check (CRC).

[0054] (2) Higher-layer information; the higher-layer information includes at least one of the following: Medium Access Control - Protocol Data Unit (MAC PDU), Medium Access Control - Control Element (MAC CE), and Radio Resource Control (RRC) signaling.

[0055] (3) Control the format of information;

[0056] In some embodiments, the first relevant information includes at least one of the following:

[0057] D2R time-domain resource information;

[0058] Information related to D2R frequency domain resources;

[0059] D2R type indication information;

[0060] D2R chip duration;

[0061] D2R information bit duration;

[0062] D2R small frequency offset factor;

[0063] D2R multiple access methods and number of devices;

[0064] Information related to D2R coding and modulation;

[0065] D2R transport block size and / or D2R transport repetition indication information;

[0066] Related information corresponding to AIoT time and frequency resources;

[0067] Prefix information indicating D2R transmission;

[0068] D2R transmission complete.

[0069] In some embodiments, the D2R type indication information described above may include, but is not limited to: multiple access method, and / or, IoT device type;

[0070] In some embodiments, the duration of the D2R chip can be indicated by the ratio of the D2R to the R2D chip duration, and / or the duration of the D2R chip can be indicated by the multiple relationship between the D2R and R2D chip durations.

[0071] The duration of the D2R information bit mentioned above can refer to the duration of the D2R information bit. The D2R information bit is the information bit obtained after CRC processing of the initial D2R data bits.

[0072] In some embodiments, the associated information corresponding to AIoT time-frequency resources includes, but is not limited to, at least one of the following:

[0073] IoT device related identification;

[0074] IoT device types;

[0075] Random access opportunity sequence number;

[0076] IoT device types.

[0077] In some embodiments, the second relevant information includes at least one of the following:

[0078] R2D frequency domain resource information;

[0079] Information related to R2D coding and modulation;

[0080] R2D transfer block size or end of transfer;

[0081] R2D transmission chip time;

[0082] Reader / writer device related markings;

[0083] Random access opportunity indicator parameter Q;

[0084] The number of R2D messages that provide supplementary or updated information after paging;

[0085] Service type indicator.

[0086] In some embodiments, among the first and second related information mentioned above, the coding and modulation related information may include: Modulation and Coding Scheme (MCS) information, and / or, MCS.

[0087] In some embodiments, the R2D coding and modulation related information mentioned above may include, but is not limited to: CRC related indication information, and / or, the M value. The M value is used to represent the number of chips in an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0088] In some embodiments, during the random access process triggered by the R2D message, after the initial Paging message and / or re-Paging message, there may be supplementary or updated R2D messages and / or subsequent Paging messages containing supplementary or updated information. The aforementioned second relevant information may include: the random access opportunity indication parameter Q, and / or the number of supplementary or updated R2D messages and / or subsequent Paging messages following the initial Paging message.

[0089] The random access opportunity indicator parameter Q is used by IoT devices to derive the number of remaining access opportunities in the current inventory round or paging round. The random access opportunity indicator parameter Q provides information about the number of remaining random access opportunities in the current inventory round. Devices can determine how many more opportunities they have to attempt to randomly access the communication network based on the value of parameter Q. This helps devices rationally allocate access attempts, avoid unnecessary blind attempts, thereby improving access efficiency and reducing access conflicts and resource waste.

[0090] In some embodiments, the service type indication may include inventory, or the service type indication may include both inventory and commands. A 1-bit indicator may be used to indicate whether commands are included.

[0091] 302. IoT devices send D2R messages to reader devices.

[0092] Correspondingly, the reader / writer device receives D2R messages sent by the IoT device.

[0093] The D2R message includes third relevant information used to indicate the D2R transmission process.

[0094] In some embodiments, the third relevant information includes at least one of the following:

[0095] Acknowledgment (ACK) / Negative Acknowledgment (NACK) feedback information;

[0096] Prefix information indicating D2R transmission;

[0097] D2R time-domain resource information;

[0098] Information related to D2R frequency domain resources;

[0099] Coding and modulation related information for D2R transmission;

[0100] D2R chip duration;

[0101] D2R information bit duration;

[0102] D2R small frequency offset factor;

[0103] Information related to IoT devices;

[0104] D2R transport block size and / or D2R transport repetition indication information;

[0105] The size of the next D2R transport block sent to the reader device or the size of the remaining unsent D2R transport blocks.

[0106] In some embodiments, among the aforementioned third related information, D2R frequency domain resource related information can be indirectly indicated by one or more of D2R chip duration, D2R bit duration, and D2R small frequency offset factor.

[0107] In some embodiments, among the aforementioned third relevant information, the ACK / NACK feedback information can be sent via L1 control information, and / or the ACK / NACK feedback information can be sent via higher-layer signaling.

[0108] In some embodiments, the ACK / NACK feedback information in the third relevant information mentioned above supports, but is not limited to, at least one of the following methods:

[0109] Method 1: If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, a NACK is sent back.

[0110] Method 2: If the R2D message is not successfully received, a NACK is sent; if it is successfully received, no ACK / NACK is sent.

[0111] Method 3: If the R2D message is successfully received, an ACK is sent; if the R2D message is not successfully received, no ACK / NACK is sent.

[0112] Method 4: If the R2D message is successfully received, an ACK is sent; if the R2D message is recognized but its content is not successfully decoded, a NACK is sent; if the R2D message is not recognized or the R2D data is not successfully received, no ACK / NACK is sent.

[0113] In some embodiments, the guide code information indicating D2R transmission in the first and third related information mentioned above includes at least one of pilot type, pilot quantity, and pilot position.

[0114] The pilot types mentioned above may include, but are not limited to, one of the following: preamble, midamble, and postamble. The number of preambles is 1, the number of midambles is greater than or equal to 0, and the number of postambles is greater than or equal to 0.

[0115] In some embodiments, the indication of D2R frequency domain resource related information in the first and third related information includes at least one of: frequency domain location indication of D2R transmission, length indication of continuously allocated frequency domain resources, and small frequency shift related information indication of D2R transmission.

[0116] In some embodiments, the coding and modulation related information of D2R transmission in the first and third related information includes at least one of: Forward Error Correction (FEC) indication information, Cyclic Redundancy Check (CRC) indication information, and modulation indication information.

[0117] The indication methods for the coding and modulation information of the aforementioned D2R transmission may include, but are not limited to, the following:

[0118] (1) Indicate the coding and modulation related information of D2R transmission through one or more fields or one or more code points in a field.

[0119] (1-1) The above FEC indication information can indicate whether FEC is to be performed and the FEC code rate. If FEC is not indicated separately, the default FEC uses an LTE CC constraint length of 7 and a code rate of 1 / 3.

[0120] Example 1: Whether FEC is performed is determined by a 2-bit indicator, a codepoint in higher-layer signaling, or one or more indicators in the FEC code rate configuration table. As shown in Table 1, a 2-bit indicator can be used to indicate the codepoint. Referring to the configured code rate table in Table 1, indicators of 00, 01, 10, and 11 represent different code rates in the FEC code rate table, namely the first, second, third, and fourth code rates. Referring to the unconfigured code rate table in Table 1, an indicator of 00 indicates no FEC; an indicator of 01 indicates the first FEC code rate; an indicator of 10 indicates the second FEC code rate; and an indicator of 11 indicates the third FEC code rate. For example, the first FEC code rate could be 1 / 3, the second FEC code rate could be 1 / 2, and the third FEC code rate could be 1 / 6. The absence of the FEC indicator indicates no FEC encoding.

[0121] Table 1: FEC Code Rate and Indicator Field

[0122]

[0123] Example 2: Whether FEC is performed can be indicated by a 1-bit indicator or a code point of higher-layer signaling. When the indicator indicates different values, it represents one of the following: no FEC, FEC code rate 1 / 3, FEC code rate 1 / 2, and FEC code rate 1 / 6. When the FEC indicator information does not appear, it means that there is no FEC encoding.

[0124] Example 3: The FEC code rate is indicated by an indicator or a code point in higher-layer signaling. When the indicator does not appear, it means there is no FEC encoding.

[0125] (1-2) The above CRC indication information can indicate the CRC method and length. Among them, no CRC, 6-bit CRC and 16-bit CRC can be supported.

[0126] Example 1: A 2-bit indicator or a code point of higher-layer signaling, indicating the CRC method and length: supports no CRC, 6-bit CRC and 16-bit CRC.

[0127] Example 2: The CRC method and / or length are indicated by higher-level signaling or one of the 1-bit code points. When the indicator does not appear, it means no CRC. When the indicator indicates different values, it means 6-bit CRC or 16-bit CRC.

[0128] (1-3) The above modulation indication information can indicate that the modulation mode is offset keying (OKK) or binary phase shift keying (BPSK).

[0129] In one indication mode: when the indicator is a first value, the modulation mode is OOK; when the indicator is a second value, the modulation mode is BPSK.

[0130] In another indication method: An MCS field is used as a combined indicator, where the MCS field or one of its code points indicates the MCS index value m, providing an index to the (m+1)th row of the MCS allocation table. The indexed row defines one or more of the following: FEC code rate (with or without FEC), CRC length (with or without CRC), modulation scheme, bit length or bit rate, chip length, and chip rate. Table 2 shows an example of an MCS index table.

[0131] Table 2: MCS Index Table

[0132]

[0133] In Table 2 of this application, the ellipsis “…” indicates that there may be more corresponding parameters not shown. The meaning of the ellipsis “…” is similar in other tables, and will not be repeated hereafter. In Table 2, C1, C2, …, Cn, and Cn+1 represent different chip durations.

[0134] In another indication method: when MCS information is indicated through physical layer control information, it supports indicating the D2R modulation mode through control information formats with different CRC scrambling. When relevant information is indicated through physical layer control information, it supports indicating partial information through control information formats with different CRC scrambling.

[0135] In some embodiments, the D2R time-domain resource related information in the first and third related information includes at least one of the following: the starting point of the D2R transmission time-domain resource, the duration of the time-domain resource, and the time-domain resource interval.

[0136] The aforementioned time-domain resource starting points include: the starting point of the first time unit, and / or, the starting point of the second time unit.

[0137] In some embodiments, the start point of the first time unit is indicated by the first time unit number, or by the number of first time units offset from the first reference time position.

[0138] In some embodiments, the start point of the second time unit is indicated by a second time unit number.

[0139] In some embodiments, the starting point of the second time unit is indicated by the length of time offset from the second reference time position.

[0140] In some embodiments, the starting point of the second time unit is indicated by an index of a time resource.

[0141] The aforementioned first time unit includes at least one of the following: frame, subframe, time slot, sub-time slot, access opportunity, and pre-configured number N1 time units.

[0142] The time of the second time unit mentioned above includes at least one of the following: R2D and / or D2R chip duration, minimum R2D and D2R chip duration, R2D symbol, D2R information bit duration, and pre-configured number N2 time units.

[0143] In this application embodiment, the time unit supports at least one of the following: R2D chip duration and / or D2R chip duration, minimum R2D chip duration and / or minimum D2R chip duration, R2D symbol, and D2R information bit duration.

[0144] The aforementioned first reference time supports at least one of the following: the start time of sending R2D transmission including D2R time domain resource information, the start time of receiving R2D transmission including D2R time domain resource information, the Xth time unit after the end of R2D transmission including D2R time domain resource information, the start time of the time domain resource of the previous IoT device, and the Xth time unit after the end of R2D transmission of the previous IoT device.

[0145] The aforementioned second reference time supports at least one of the following: the start time of sending R2D transmission including the D2R time domain resource information, the start time of receiving R2D transmission including the D2R time domain resource information, the Xth time unit after the completion of R2D transmission including the D2R time domain resource information, the start time of the time domain resource of the previous IoT device, or the Xth time unit after the completion of R2D transmission of the previous IoT device, and the start point of the first time unit.

[0146] Where X ≥ 1. The previous IoT device refers to the IoT device that precedes the current IoT device in the indicated sequence.

[0147] The time length of the aforementioned time-domain resources supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, or indication by a single time quantity. The time quantity is determined by the number of pre-configured or predefined time units.

[0148] The aforementioned time-domain resource interval supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity. The time quantity is determined by the number of pre-configured or predefined time units.

[0149] In some embodiments, the relevant information of the IoT device in the first and third relevant information mentioned above includes at least one of the following:

[0150] Equipment time accuracy, and / or time offset;

[0151] Equipment phase accuracy, and / or phase offset;

[0152] Equipment frequency offset capability, and / or, operating frequency range;

[0153] Energy status information of the equipment;

[0154] IoT device related identifiers and / or device types.

[0155] The operating frequency range includes either the maximum range supported by the device's frequency offset capability or a recommended range.

[0156] In some embodiments, control information during R2D transmission indicates the allocation of time-domain resources for D2R transmission.

[0157] In some embodiments, D2R time-domain resource-related information supports, but is not limited to, at least one of the following indication methods:

[0158] Method (1): Indication information representing D2R time domain resource related information is indicated by a first content, wherein the first content includes one or more fields, one or more code points in a field, and at least one of one or more indication fields.

[0159] In some embodiments, the indication information related to the D2R time domain resources mentioned above may include, but is not limited to, one or more of the following: first time unit offset, first time unit length, second time unit start point, second time unit length, D2R type indication information, D2R repetition type, and D2R repetition count.

[0160] The D2R type indication information includes one or more of the D2R device type, multiple access type, and frequency division multiple access implementation type.

[0161] In some embodiments, the information indicated by the field includes a numerical value of the indicated content or an index number of the indicated content mapping table.

[0162] Example 1: The indication information of the above D2R time domain resource information includes: first time unit offset K2, start and length indicator SLIV, D2R type indication information, D2R repetition type and D2R repetition number.

[0163] The start position of the time resource, Tstart, can be calculated as Tstart = Tref + K2 * T1 + S * T2, and the length of the time resource, Tlength, can be calculated as Tlength = L * T2. In the example of this application, Tref is a reference time point used to determine the start of the time domain resource, which can be the end of the transmission of the R2D message or the end of the previous D2R message, T1 is the time length of a single first time unit, and T2 is the time length of a single second time unit.

[0164] The relationship between SLIV, the starting point S of the second time unit, and the length L of the second time unit can be shown in Table 3 below:

[0165] Table 3: Mapping relationship between SLIV and S and L

[0166]

[0167] As shown in Table 3 above, only three lengths and three starting points are illustrated in the mapping relationship between SLIV and the given values. It is understood that in practice, there may be more or fewer mapping relationships. As can be seen from the figure, for a given length and a given starting point, a corresponding SLIV value can be determined. For example, in Table 3, length 1 and starting point 1 can be assigned the corresponding SLIV value S11.

[0168] Example 2: The indication information of the above D2R time domain resource information includes: first time unit offset K2, second time unit start position S and second time unit length L, D2R type indication information, D2R repetition type and D2R repetition number.

[0169] The starting position of the time resource can be calculated as Tstart = Tref + K2 * T1 + S * T2, and the length of the time resource can be calculated as Tlength = L * T2.

[0170] Example 3: The indication information of the above D2R time domain resource information includes: first time unit offset K2, second time unit start position S, second time unit length L, D2R type indication information, D2R repetition type and D2R repetition number.

[0171] The starting position of the time resource can be calculated as Tstart = Tref + K2 * T1 + S * T2, and the length of the time resource can be calculated as Tlength = L * T1.

[0172] Example 4: The indication information of the above D2R time domain resource information includes: first time cell offset K2, first time cell length L, D2R type indication information, D2R repetition type and number.

[0173] The starting position of the time resource can be calculated as Tstart = Tref + K2 * T1, and the length of the time resource is Tlength = L * T1.

[0174] Example 5: The indication information of the above D2R time domain resource information includes: the start position S of the second time unit, the length L of the second time unit, the D2R type indication information, the D2R repetition type, and the number of D2R repetitions.

[0175] The starting position of the time resource can be calculated as Tstart = Tref + S * T2, and the length of the time resource can be calculated as Tlength = L * T2.

[0176] Method (2): The second content indicates the D2R time domain resource allocation field value m, where the field value m represents the index of the (m+1)th row of the time domain resource allocation table. The (m+1)th row defines the indication information related to D2R time domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field.

[0177] In some embodiments, the indication information related to D2R time-domain resources may include, but is not limited to, one or more of the following: time unit offset K2, start and length indicator SLIV, start time unit S and allocation length L, and D2R type indication information.

[0178] The determination of the resource allocation table includes one or more of the following:

[0179] Example 1: The resource allocation table is selected in conjunction with the CP length. For example, the following tables can be used in combination.

[0180] Table 4: Default PDRCH time-domain resource allocation for normal CP

[0181]

[0182] Table 5: Default D2R Transport PDRCH Time Domain Resource Allocation for Extended CP

[0183]

[0184] Example 2: The parameter values ​​in the resource allocation table can be given directly, or they can be selected by combining other information indexes. For example, K2 in Table 6 can be determined by the M value in Table 7.

[0185] Table 6: Default D2R Transmission PDRCH Time Domain Resource Allocation

[0186]

[0187] The j value mentioned above can be selected either by control information indication or by indexing the definition table of M and j values ​​in R2D. The M value is used to represent the number of chips in an OFDM symbol.

[0188] Table 7: Definitions of M and j values

[0189]

[0190] Example 3: The resource allocation table contains the offset K2 of the first time unit and the length L of the first time unit, as shown in Table 8 below:

[0191] Table 8: Default D2R Transmission PDRCH Time Domain Resource Allocation

[0192]

[0193] Example 4: The resource allocation table contains the offset S of the second time unit and the length L of the second time unit.

[0194] Example 5: The resource allocation table contains the offset K of the first time unit and the start length indicator symbol SLIV.

[0195] Example 6: One or more rows in the resource allocation table contain multiple time resource indication messages.

[0196] In one scenario: the default D2R transmission PDRCH time domain resource allocation is 1, as shown in Table 9 below:

[0197] Table 9: Default D2R Transmission PDRCH Time Domain Resource Allocation 1

[0198]

[0199] In another case: the default D2R transmission PDRCH time domain resource allocation is 2, as shown in Table 10 below:

[0200] Table 10: Default D2R Transmission PDRCH Time Domain Resource Allocation 2

[0201]

[0202] Example 7: The resource allocation table and the index table indicating the row index can be seen in Table 11 below:

[0203] Table 11: PDRCH Time Domain Resource Allocation

[0204]

[0205] Table 12: Definition of L Index Values

[0206]

[0207] The definition of the L index value is shown in Table 12 above. In this embodiment of the application, the L value can be indicated by the index value in Table 12.

[0208] Method (3): The field value of the first information is indicated by the second content. The field value of the first information corresponds to the row index and column index of the resource mapping table. The row where the row index is located and the column where the column index is located define the indication information of the second information respectively. The first information and the second information are different D2R time domain resource related information.

[0209] In some embodiments, the information indication method for the first, second, third, and fourth information may include at least one of the following information indicating the content: the corresponding numerical value, the corresponding quantization value, and the index number with a mapping relationship.

[0210] In some embodiments, the indication information related to D2R time-domain resources includes at least one of the following:

[0211] Time unit offset;

[0212] Start and length indicators;

[0213] Start time unit;

[0214] The length of time allocated, or the number of time units;

[0215] D2R type indication information;

[0216] Transport Block Size (TBS);

[0217] Used to determine the time length or number of time units of a TBS;

[0218] The ratio of R2D to D2R time units;

[0219] The number of repetitions used in D2R transmission;

[0220] Related information corresponding to time-domain resources.

[0221] The aforementioned time units include one of the following: a first time unit, a second time unit, and a time unit. The first time unit and the second time unit can be different time units determined by one or more time units.

[0222] The ratio of the R2D and D2R time units mentioned above may include the ratio of the chip durations of R2D and D2R.

[0223] In some embodiments, the associated information corresponding to the time-domain resources may include, but is not limited to, at least one of the following: device type, multiple access type, and access opportunity related serial number.

[0224] In some embodiments, D2R frequency domain resource-related information includes: first frequency domain information, and / or, second frequency domain information.

[0225] The first frequency domain information includes at least one of the following: frequency domain location of D2R transmission, D2R frequency shift factor, and frequency domain location indication information;

[0226] The second frequency domain information includes: transmission bandwidth, D2R information bit rate, D2R rate, and transmission bandwidth size indication information.

[0227] In some embodiments, the indication method of the first frequency domain information includes at least one of the following:

[0228] Indicate the frequency location by indicating the starting frequency domain resource location;

[0229] A frequency offset (NSF) indicates the frequency offset from the carrier frequency.

[0230] Indicated by a frequency domain resource index;

[0231] Indirectly indicated by the frequency offset factor;

[0232] The indication method for the second frequency domain information includes at least one of the following:

[0233] Indicated by the number of frequency domain resource units allocated consecutively;

[0234] Indicated by bit duration;

[0235] Indicated by bit rate;

[0236] Indicated by chip duration and frequency shift factor;

[0237] Indicated by index tables and mapping relationships.

[0238] In some embodiments, D2R frequency domain resource-related information supports, but is not limited to, at least one of the following indication methods:

[0239] Method 1: The first content represents the indication information related to D2R frequency domain resources. The first content includes one or more fields, one or more code points in one field, and at least one of one or more indication fields.

[0240] The first content mentioned above can be used to indicate one or more of the following: frequency domain resource location, frequency domain resource offset, and length of continuously allocated frequency domain resources.

[0241] Example 1: The indication information for D2R frequency domain resource information includes: frequency domain resource location F1, or resource cell number N1. The frequency domain resource location can be calculated as: F1 = N1 * Ru, where Ru is the size of a single frequency domain resource cell.

[0242] Example 2: The indication information related to D2R frequency domain resources includes: the starting resource cell number NStart and the frequency domain offset Nsf from the starting frequency. The starting frequency Fstart can be indicated by the starting resource cell number, and the starting frequency can be the frequency of the carrier CW. The frequency domain resource location can be calculated as: F1 = Nsf * Ru + Nstart * Ru.

[0243] Example 3: The indication information of D2R frequency domain resource information includes: frequency offset indicated by frequency domain offset Nsf from the starting frequency: Fsf=Nsf*Ru, and the starting frequency Fstart supports at least the frequency of carrier CW.

[0244] The location of frequency domain resources can be calculated as: F1 = Nsf * Ru + Fstart.

[0245] Example 4: The indication information related to D2R frequency domain resources includes: frequency offset factor Rsf and bit duration Tb or bit rate 1 / Tb, indirectly deriving the frequency domain offset from CW: frequency offset Fsf = ±Rsf / Tb. The frequency domain resource location can be calculated as: F1 = Fsf + Fcw, where Fcw = Ncw * Ru is the carrier frequency.

[0246] Example 5: The indication information of D2R frequency domain resource information includes: frequency offset factor Rsf and chip duration Tc or chip rate 1 / Tc, which indirectly derives Fsf = ±Rsf / (2*Tc). The frequency domain resource location can be calculated as: F1 = Fsf + Fcw.

[0247] Example 6: The indication information related to D2R frequency domain resources includes: frequency offset factor Rsf and baseband bandwidth rate BW, indirectly deriving Fsf = ±Rsf*BW / 4. The frequency domain resource location can be calculated as: F1 = Fsf + Fcw, where Fcw = Ncw*Ru is the carrier frequency.

[0248] Example 7: The indication information related to D2R frequency domain resources includes: directly indicating the number of consecutive frequency domain units NBW, and the length of the consecutively allocated frequency domain resources FBW=NBW*Ru.

[0249] Example 8: The indication information of D2R frequency domain resource information includes: indirectly derived by indicating the baseband bit duration Tb' information, where the bit duration can be derived by bit rate = 1 / Tb', and the length of continuously allocated frequency domain resources FBW = 4 / Tb'.

[0250] Example 9: The indication information of D2R frequency domain resource information includes: indirectly derived by indicating the baseband chip duration Tc' information, where the chip duration can be derived by chip rate = 1 / Tc', and the length of continuously allocated frequency domain resources FBW = 2 / Tc'.

[0251] Example 10: The indication information of D2R frequency domain resource information includes: indirectly derived by indicating the baseband bandwidth BW' information, the length of the continuously allocated frequency domain resources FBW=BW' / 2.

[0252] Example 11: The indication information related to D2R frequency domain resources includes: indirectly derived from the indication information block size TBS and the D2R message duration T, and the length of continuously allocated frequency domain resources FBW = TBS / T / 2.

[0253] For device type device1, the double-sideband modulation has a D2R transmission bandwidth of 2FBW, located on both sides of the carrier as Fcw±Fsf.

[0254] The chip duration of D2R can be indicated by the parameter of the ratio of D2R to R2D chip duration. The chip duration of D2R can also be indicated by the parameter of the multiple relationship between D2R and R2D chip duration. The chip rate of D2R can be indicated by the parameter of the ratio of D2R to R2D chip rate. The chip rate of D2R can also be indicated by the parameter of the multiple relationship between D2R and R2D chip rate.

[0255] Method 2: The second content indicates the value n of the D2R frequency domain resource allocation field. The field value n represents the index of the (n+1)th row of the frequency domain resource allocation table. The (n+1)th row defines the indication information related to D2R frequency domain resources. The second content includes at least one of the following: a field, a code point in the field, and an indication field.

[0256] In some embodiments, the information indication method for the first information and the second information mentioned above may include at least one of the following information indicating the content: the corresponding numerical value, the corresponding quantization value, and the index number with a mapping relationship.

[0257] The resource allocation of the first and second information sets in the frequency domain can be jointly indicated by a frequency domain resource allocation field, which contains a frequency domain resource indication value (RIV).

[0258] Example 1: The relationship between RIV, the starting frequency domain resource unit Nstart (or the frequency offset Fsf from the reference frequency), and the length NBW of the continuously allocated frequency domain resource blocks can be determined by indexing RIV into the mapping table, as shown in Table 13 below:

[0259] Table 13: Mapping relationship between RIV, Nstart (or Nsf), and NBW

[0260]

[0261] As shown in Table 13 above, N represents Nstart or Nsf. Table 13 only illustrates the mapping relationship between three N values ​​and three NBW values ​​and RIV. It is understandable that in practice, there may be more or fewer mapping relationships. As can be seen from the figure, for a given N and an NBW, a corresponding RIV value can be determined. For example, N1 and N1' in Table 13 can be assigned the corresponding RIV value R11.

[0262] Example 2: The relationship between RIV, the frequency domain start frequency Fstart (or the frequency offset Fsf from the reference frequency), and the continuously allocated frequency domain resource size FBW can be mapped to a table using RIV indexes, as shown in Table 14 below:

[0263] Table 14: Mapping relationship between RIV, Fstart (or Fsf), and FBW

[0264]

[0265] As shown in Table 14 above, F represents Fstart or Fsf. Table 14 only illustrates the mapping relationship between three F values ​​and three FBW values ​​and RIV. It is understandable that in practice, there may be more or fewer mapping relationships. As can be seen from the figure, for a given F and an FBW, a corresponding RIV value can be determined. For example, F1 and BW1 in Table 14 can be assigned the corresponding RIV value R11.

[0266] Example 3: The relationship between RIV and frequency offset factor Rsf and parameter X can be found in the mapping table through RIV index. Here, X is one or more of the continuously allocated frequency domain resources NBW, Tb, bit rate, Tc, chip rate, and baseband bandwidth, as shown in Table 15 below. X1, X2, X3, etc. in Table 15 can represent different parameters among the allocated frequency domain resources NBW, Tb, bit rate, Tc, chip rate, and baseband bandwidth.

[0267] Table 15: Mapping relationship between RIV, frequency offset factor Rsf, and parameter X

[0268]

[0269] As shown in Table 15 above, R represents the frequency offset factor Rsf. Only three frequency offset factors Rsf and three parameters X are illustrated in the mapping relationship between RIV and RIV. It is understood that in practice, there may be more or fewer mapping relationships. As can be seen from the figure, for one Rsf and one parameter X, a corresponding SLIV value can be determined. For example, Rsf1 and X1 in Table 15 can determine the corresponding RIV value R11.

[0270] Example 4: An index to the (m+1)th row of a resource allocation table is provided by indicating the D2R frequency domain resource allocation field value m through a frequency domain resource allocation field. The indexed row defines one or more of the following: continuously allocated frequency domain resource NBW, Tb or bit rate, Tc or chip rate, baseband bandwidth, and D2R message type. A row definition in the resource allocation table must contain at least one of the column information in Table 16 below, as shown in Table 16:

[0271] Table 16: Default D2R Transmission PDRCH Frequency Domain Resource Allocation Table

[0272]

[0273] Method 3: Indicate the frequency domain resource block allocated to the D2R transmission of the IoT device by a bit string and / or bitmap.

[0274] When a bit in the string is 1, the frequency domain resource bit allocated to the IoT device is mapped to the frequency domain resource block in the bitmap corresponding to that bit, or the frequency domain resource block in the bitmap corresponding to that bit is allocated to the IoT device; otherwise, the resource block is not allocated to the IoT device.

[0275] Resource allocation or frequency offset factors can be indicated through mapping tables and bitmaps.

[0276] Example 1: Frequency domain resources can be indicated using a bitmap.

[0277] The bitmap size is NB bits, with each bit corresponding to a frequency domain resource unit. Frequency domain resource units are indexed in ascending frequency order, starting from the lowest frequency. The bitmap order is: the bitmap maps from the most significant bit (MSB) -> the least significant bit (LSB) to subband 0 -> frequency domain resource NB-1. Frequency domain resource units support one or more of subbands, subcarriers, and frequency domain resource blocks. NB represents the maximum number of corresponding resources. These resource units are indexed in ascending frequency order, starting from 0 and ending at NB-1. See Table 17 below:

[0278] Table 17: D2R Transmission PDRCH Frequency Domain Resource Bitmap

[0279]

[0280] a) The minimum number of frequency domain resource units is S1, and the maximum number is S2. Continuous and non-contiguous resource configurations are supported. Configuration can be specified via a set of bitmap strings. If the corresponding bit value in the bitmap is 1, the frequency domain resource allocated to the UE is located on that frequency domain resource unit. Specifically, if the frequency domain resource is the minimum resource allocation unit, it is allocated to the UE. Otherwise, if the corresponding bit value in the bitmap is 0, the frequency domain resource unit is not allocated to the UE.

[0281] b) Frequency domain resources are configured as a certain number of resource units or one of the values ​​of a set of resource unit configuration indexes. When S1>2 is configured, different resource sizes at the beginning and end are supported.

[0282] Example 2: Indicate frequency offset factor via bitmap.

[0283] The bitmap size is N bits, with each bit corresponding to a frequency offset factor. Frequency domain resources are indexed in ascending order of size, starting from the smallest value. The bitmap order is: the bitmap maps from MSB to LSB to subband 0 to frequency offset factor N-1. A set of frequency offset factors {Rsf 1, …, Rsf N} configures the value of each element in a pre-configured, pre-defined, or Reader-indicated manner, where N is the maximum number of elements in the set of frequency offset factors.

[0284] Table 18: D2R Transmission PDRCH Frequency Offset Factor Bitmap

[0285]

[0286] Method (4) can indicate the D2R time domain resource information by means of joint indication of time domain resources and frequency domain resources, and / or can indicate the D2R frequency domain resource information by means of joint indication of time domain resources and frequency domain resources.

[0287] The above method (4) may include, but is not limited to:

[0288] For example, the first content can represent indication information related to D2R time-frequency resources;

[0289] For example, the second content can indicate the D2R time-frequency resource allocation field value y; the field value y represents the index of the (y+1)th row of the time-frequency resource allocation table, and the (y+1)th row defines the indication information related to D2R time-frequency resources.

[0290] For example, the field value of the third information can be indicated by the second content. The field value of the third information corresponds to the row index and column index of the time-frequency resource mapping table. The row where the row index is located and the column where the column index is located define the indication information of the fourth information. The third information and the fourth information are different D2R time-frequency resource related information.

[0291] For example, a bit string and / or bitmap can be used to indicate the time-frequency resource block for D2R transmission assigned to an IoT device.

[0292] In this embodiment of the application, the time-frequency domain joint resource control resource set (CORESET) may include:

[0293] A set of frequency domain resources, the elements of which support subband, subcarrier, resource block, resource unit, frequency offset factor, or one of the indexes of time domain resources determined in the above embodiments;

[0294] A set of time-domain resources, the elements of which support frames, subframes, time slots, sub-time slots, time units, Tb durations, chip durations, R2D symbols, or one of the indexes of time-domain resources determined in the above embodiments.

[0295] For example, frequency domain resources are indexed in ascending order of frequency, starting from the lowest frequency. Time domain resources are indexed in ascending order of time, starting from the lowest time.

[0296] Example 1: Indicated via bitmap.

[0297] The bitmap size is Nf*Nt bits, and each bit corresponds to a resource composed of both frequency domain and time domain resources, i.e., the time-frequency resource block in method 6 above. Its specific form is shown in Table 19 below:

[0298] Table 19: D2R Transmission PDRCH Time-Frequency Domain Resource CORESET bitmap

[0299]

[0300] Example 2: Indicated by resource mapping tables and indexes.

[0301] Each row of the resource allocation table must contain at least one of the column information shown in Table 20 below, where X represents one or more of the following: continuously allocated frequency domain resources NBW, Tb, bit rate, Tc, chip rate, baseband bandwidth, R2D and D2R time domain unit ratio, D2R message application scenario, and D2R message type, as shown in Table 20 below:

[0302] Table 20: D2R Transmission PDRCH Time-Frequency Domain Resource CORESET Mapping Table

[0303]

[0304] In Table 20, the indicated row index number corresponds to the time-frequency domain information in the resource mapping table. Here, X1, X2, ..., Xn represent different time-domain resources; Y1, Y2, ..., Yn represent different frequency-domain resources; Rsf1, Rsf2, ..., Rsfn represent different frequency offset factors; Type 1, Type 2, ..., Yn represent multiple types; Parameter 1, Parameter 2, ..., Parameter n represent parameters in the continuously allocated frequency-domain resources NBW, Tb, bit rate, Tc, chip rate, baseband bandwidth, R2D and D2R time-domain unit ratio, D2R message application scenario, and D2R message type.

[0305] Example 3: The index of the time-frequency domain resource is indicated by one or more fields or one or more code points in a field, where each time-domain resource index corresponds to a time-domain resource in the above embodiment and each frequency-domain resource index corresponds to a frequency-domain resource in the above embodiment.

[0306] The indication information related to D2R frequency domain resources includes at least one of the following:

[0307] Starting position of frequency domain resources;

[0308] Indicator of the number of consecutively allocated frequency domain resource units;

[0309] Frequency offset factor used in D2R transmission;

[0310] The ratio of R2D to D2R frequency domain units;

[0311] Frequency domain resource unit start position and length;

[0312] Frequency domain resource start indicator and length indicator;

[0313] Related information for frequency domain resources.

[0314] Among them, the associated information corresponding to frequency domain resources includes at least one of the following: device type, multiple access type, and frequency division multiple access implementation method.

[0315] In some embodiments, the D2R multiple access method includes: a combination of Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA), TDMA, and FDMA.

[0316] In some embodiments, when the D2R multiple access method is TDMA, the first relevant information indicates multiple time-domain resources, and the number of time-domain resources is greater than or equal to the device data of the D2R multiple access.

[0317] In some embodiments, when the D2R multiple access method is FDMA, the first relevant information indicates multiple frequency domain resources, and the number of frequency domain resources is greater than or equal to the device data of the D2R multiple access.

[0318] In some embodiments, when the D2R multiple access method is TDMA combined with FDMA, the first relevant information indicates multiple time-domain resources and / or multiple frequency-domain resources, and the multiple time-domain resources and / or multiple frequency-domain resources are greater than or equal to the device data of the D2R multiple access.

[0319] In some embodiments, the indication method for D2R transmission of duplicate indication information includes at least one of the following:

[0320] Explicitly indicate the number of repetitions;

[0321] Indicates the type of repetition parameter and / or calculation rule, which is used by IoT devices to determine the number of repetitions based on the calculation rules;

[0322] The number of repetitions in a set of repetitions is indirectly indicated by the index number and a set of repetition index tables.

[0323] In some embodiments, the IoT device related identifier includes at least one of the following: the IoT device's AS ID, the IoT device's device ID, a random number generated or reported by the IoT device, a random ID generated based on the random number reported by the IoT device, or other device related identifiers;

[0324] The indication methods for IoT device-related identifiers include: carrying IoT device-related identifiers through the Physical Reader-Device Channel (PRDCH) or the Physical Device-Reader Channel (PDRCH), and / or, a mask for the IoT device-related identifiers.

[0325] In some embodiments, the reader / writer device is an intermediate node, such as... Figure 4 The diagram illustrates another message transmission method, including the following steps:

[0326] 401. The reader device sends a Reader to Device (R2D) message to the IoT device.

[0327] 402. IoT devices send D2R messages to reader devices.

[0328] 403. The reader / writer device receives the third message sent by the base station.

[0329] The third message includes a fourth relevant information used to instruct intermediate nodes to communicate with base stations and / or with IoT devices.

[0330] In some embodiments, the fourth relevant information includes at least one of the following:

[0331] The information includes higher-level RRC signaling, indication information in L1 messages, downlink control information (DCI), and indication information in L2 messages. The indication information in L2 messages includes MAC CE.

[0332] In some embodiments, the downlink control information described above is used to indicate information for intermediate nodes to conduct NR communication with base stations or information for conducting AIoT communication with IoT devices.

[0333] In some embodiments, the downlink control information format configuration supports a new DCI format specifically for scheduling intermediate nodes to communicate with IoT devices.

[0334] In some embodiments, the downlink control information format configuration supports: reusing the original DCI format for communication between intermediate nodes and NR.

[0335] 404. The reader device sends a fourth message to the base station based on the fourth relevant information.

[0336] The fourth message includes a fifth relevant information used to provide feedback on communication between intermediate nodes and base stations and / or with IoT devices.

[0337] The aforementioned downlink control information indicates at least one of the following:

[0338] UL time and frequency resource indication information;

[0339] Time and frequency resource indication information for intermediate nodes during AIoT transmission;

[0340] AIOT CW frequency domain resource indication information and start or stop indication;

[0341] Priority or timing indication for NR and AIoT transmissions;

[0342] Does the intermediate node support AIoT transmission in RRC state?

[0343] The aforementioned RRC states include one or more of the following: idle, inactive, and active states. Active is also a connected state.

[0344] In some embodiments, the UL time-frequency resource indication information includes: the time-frequency resources of UL data, and / or, the time-frequency resources of UL control information.

[0345] The time-frequency resources of the aforementioned UL control information include: time-domain or frequency-domain resource indications reported by NR communication feedback information, and / or, time-domain or frequency-domain resource indications reported by AIOT communication feedback information.

[0346] The time-domain resource indication for the feedback information reporting of AIoT communication includes: AIOT feedback timing indicator, which is used to indicate the time between the PDCCH and the NR uplink feedback information reporting containing AIOT transmission related information.

[0347] In some embodiments, the time-frequency resource indication information for the intermediate node's AIOT transmission process includes: indicating the resource configuration mode of the AIOT transmission, and / or indicating the time-frequency domain resources of the AIOT transmission.

[0348] The resource configuration mode for AIoT transmission includes at least one of the following: supporting random access, resource indication under dynamic resource allocation mode, and activation and deactivation of configuration resources under semi-static resource allocation Type2 mode.

[0349] The time-frequency domain resources indicating AIOT transmission include at least one of R2D time-frequency resources, D2R time-frequency resources, and R2D and D2R time-frequency resources. The time-frequency domain resources for AIOT transmission include one or more sets of time-frequency resources, and / or one or more time-frequency resources corresponding to the associated information of each AIOT time-frequency resource.

[0350] In some embodiments, the fifth relevant information includes at least one of the following: feedback information, CSI report, and scheduling request information.

[0351] The aforementioned CSI report is generated by the UE using a Channel State Information - Reference Signal (CSI-RS) sequence for NR downlink channel state information measurement; it carries scheduling request information in the UCI, which is used to request the base station to allocate resources for intermediate nodes to report AIoT communication data transmission to the base station, and / or allocate resources for AIoT transmission with IoT devices.

[0352] The aforementioned feedback information includes: Hybrid Automatic Repeat Request (HARQ) ACK / NACK feedback information for NR downlink messages, and / or, feedback information related to AIoT transmission; wherein, the feedback information related to AIoT transmission is used to report: ACK / NACK information related to communication between intermediate nodes as reader devices and IoT devices.

[0353] The format of the feedback information related to AIoT transmission includes: one bit for reporting feedback information of AIoT communication, and / or one or more bits for reporting feedback information of AIoT communication corresponding to each IoT device.

[0354] The configuration methods for feedback information include, but are not limited to, at least one of the following:

[0355] Configuration Method 1: Within a set of D2R receiving occcasions, if a D2R message sent by at least one IoT device is received in at least one occcasion, the reader will report the feedback information associated with at least one IoT device to the resource and generate an ACK message corresponding to at least one IoT device; if no D2R message is received within a set of D2R receiving occcasions, a NACK message will be generated.

[0356] For example, if a Reader receives a D2R message in at least one D2R reception occasion within a set of D2R reception occasions, the Reader associates the resources of that device and generates ACK information for one or more devices; otherwise, if no D2R message is received after the maximum number of D2R reception occasions and no D2R ACK message has been received before, the Reader considers the reception to have failed and generates NACK.

[0357] For example, Figure 5A This is a schematic diagram of a feedback information generation process in one embodiment. The execution subject of this method can be a reader / writer device, in which case the reader / writer device is an intermediate node. The method includes the following steps:

[0358] 501. Listen for D2R messages from one or more IoT devices within the D2R listening time window.

[0359] 502. Determine whether a D2R message has been received from an IoT device.

[0360] If it is determined that a D2R message from an IoT device has been received, proceed to step 504 below; if it is determined that a D2R message from an IoT device has not been received, proceed to step 503 below.

[0361] 503. Determine whether the maximum number of D2R reception opportunities has been reached.

[0362] When the maximum number of D2R reception opportunities is reached, proceed directly to step 505; when the maximum number of D2R reception opportunities is not reached, return to step 501.

[0363] 504. Generate ACK information corresponding to the IoT device.

[0364] This includes generating ACK information that is identical to the ACK information of the D2R information corresponding to the IoT device, or actively generating ACK information corresponding to the IoT device.

[0365] The Reader above supports generating ACK messages in the following methods: A and B.

[0366] Method A: The Reader generates ACK information that is identical to the ACK information of the D2R message received by the most recent D2R transmission Occasion.

[0367] Method B: The Reader actively generates ACK information based on the D2R message received from the most recent D2R transmission Occasion.

[0368] 505. If reception fails, generate a NACK.

[0369] Configuration Method 2: Within a set of D2R receiving opportunities, if D2R messages from one or more IoT devices or all IoT devices in an IoT device group are received, then an ACK message corresponding to the group is generated by associating the resources of that group; if D2R messages from all IoT devices are not received within a set of D2R receiving opportunities, then a NACK message is generated.

[0370] For example, the Reader receives a group of D2R messages within the target acknowledgment tag device range. In the occcasion, the Reader receives D2R messages from all devices. The Reader then associates the resources of that group with the group and generates an ACK message corresponding to that group; otherwise, the Reader considers the reception to have failed and generates a NACK.

[0371] For example, the aforementioned Reader target response tag device range may refer to the Ambient Internet of Things Group (AIOT Group).

[0372] For example, Figure 5B This is a flowchart illustrating another method for generating feedback information in one embodiment. The execution entity of this method can be a reader / writer device, which acts as an intermediate node. The method includes the following steps:

[0373] 511. Listen for D2R messages from a group of IoT devices within the D2R listening time window.

[0374] 512. Determine whether D2R messages have been received from all IoT devices in the group.

[0375] If it is determined that D2R messages have been received from all IoT devices in the group, proceed to step 514 below; if it is determined that D2R messages have not been received from all IoT devices in the group, proceed to step 513 below.

[0376] 513. Determine whether the maximum number of D2R reception opportunities has been reached.

[0377] When the maximum number of D2R reception opportunities is reached, proceed directly to step 515; when the maximum number of D2R reception opportunities is not reached, return to step 511.

[0378] 514. Generate an ACK message corresponding to the group.

[0379] 515. If reception fails, generate a NACK.

[0380] Configuration method 3: Supports pre-configured ACK / NACK response mechanisms corresponding to AIoT service types, or supports ACK / NACK response mechanisms corresponding to AIoT service types indicated by control information or higher-level signaling.

[0381] For example, in response to a command to shut down the radio frequency response issued by the network, the Reader generates an ACK or NACK based on the command execution status of the tag.

[0382] For example, Figure 6A This is a schematic diagram illustrating a process in one embodiment where an intermediate node sends data to a base station or provides feedback information about AIoT transmission. In this process, the base station dynamically schedules uplink control information (UCI), and the method includes the following steps:

[0383] 601. The intermediate node receives the relevant message instruction and configures time and frequency resources for one or more IoT devices according to the relevant message instruction.

[0384] The relevant message indications include: higher-level RRC signaling, and / or, indication information in L1 / L2 messages, and / or, DCI.

[0385] 602. Intermediate nodes, acting as reader / writer devices, communicate with one or more IoT devices and send messages or commands to the IoT devices via broadcast, unicast, or multicast.

[0386] 603. Intermediate nodes listen for response messages from one or more IoT devices in one or a group of AIoT receivers and generate relevant feedback reports based on the transmission status.

[0387] 604. The intermediate node sends the first uplink control message and requests the resource bearer feedback report information for the second UL channel via UCI.

[0388] The aforementioned uplink control message consists of one or more bits.

[0389] 605. Intermediate node detection DCI format to indicate the resource carrying feedback report information in the second UL channel.

[0390] 606. The intermediate node will transmit the feedback report information on the second UL channel.

[0391] For example, Figure 6B In one embodiment, a process is described where an intermediate node sends data to a base station or provides feedback information about AIoT transmission. In this process, the UCI is a pre-configured UCI. The method includes the following steps:

[0392] 611. The intermediate node receives the relevant message instruction and configures time and frequency resources for one or more IoT devices according to the relevant message instruction.

[0393] 612. Intermediate nodes, acting as reader / writer devices, communicate with one or more IoT devices and send messages or commands to the IoT devices via broadcast, unicast, or multicast.

[0394] 613. Intermediate nodes listen for response messages from one or more IoT devices in one or a group of AIoT receivers and generate relevant feedback reports based on the transmission status.

[0395] 614. The intermediate node sends the first uplink control message and notifies the base station of the resources for the second UL channel carrying feedback report information via UCI.

[0396] The aforementioned UCI refers to the UCI in the pre-configured resources, and the aforementioned uplink control message consists of one or more bits.

[0397] 615. The intermediate node sends feedback report information on the second UL channel.

[0398] It should be understood that, although Figures 3-6B The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order in which these steps are executed, and they can be performed in other orders. Furthermore, Figures 3-6BAt least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0399] In one embodiment, such as Figure 7 As shown, a structural block diagram of a reader / writer device is provided, including:

[0400] The sending module 701 is used to send an R2D message to an Internet of Things device. The R2D message includes: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process.

[0401] The receiving module 702 is used to receive D2R messages sent by IoT devices, the D2R messages including third relevant information for indicating the D2R transmission process.

[0402] In some embodiments, the reader / writer device is an intermediate node.

[0403] The receiving module 702 is also configured to receive a third message sent by the base station, the third message including: fourth relevant information for instructing the intermediate node to communicate with the base station and / or with the Internet of Things device;

[0404] The sending module 701 is further configured to send a fourth message to the base station based on the fourth relevant information, the fourth message including: a fifth relevant information for feedback on communication between the intermediate node and the base station and / or with the Internet of Things device.

[0405] In one embodiment, such as Figure 8 As shown, a structural block diagram of an Internet of Things (IoT) device is provided, including:

[0406] The receiving module 801 is configured to receive an R2D message sent by the reader device, the R2D message including: first related information for indicating the D2R transmission process, and / or, second related information for indicating the R2D message transmission process;

[0407] The sending module 802 is used to send a D2R message to the receiving reader device, the D2R message including third relevant information for indicating the D2R transmission process.

[0408] exist Figure 7 and / or Figure 8 The device shown may also include, but is not limited to, the contents of the following embodiments:

[0409] In some embodiments, the indication of the first relevant information and / or the second relevant information supports at least one of the following:

[0410] The formats of physical layer information, higher layer information, and control information;

[0411] The physical layer information includes: control information, and / or data information. The control information indicates: the content of the control information, and / or the format of the control information. The format of the control information uses different CRC scrambling methods. The higher layer information includes at least one of MAC CE, MAC PDU, and RRC signaling.

[0412] In some embodiments, the first relevant information includes at least one of the following:

[0413] D2R time-domain resource information;

[0414] Information related to D2R frequency domain resources;

[0415] D2R type indication information;

[0416] D2R chip duration;

[0417] D2R information bit duration;

[0418] D2R small frequency offset factor;

[0419] D2R multiple access methods and number of devices;

[0420] Information related to D2R coding and modulation;

[0421] D2R transport block size;

[0422] D2R transmission of duplicate indication information;

[0423] Associated information corresponding to AIoT time-frequency resources, wherein the time-frequency resources include: time-domain resources, and / or, frequency-domain resources;

[0424] Prefix information indicating D2R transmission;

[0425] D2R transmission complete.

[0426] In some embodiments, the second relevant information includes at least one of the following:

[0427] R2D frequency domain resource information;

[0428] Information related to R2D coding and modulation;

[0429] R2D Transport Block Size (TBS);

[0430] R2D transmission complete;

[0431] The duration of the chip in R2D transmission;

[0432] The reader / writer device related identification;

[0433] Random access opportunity indicator parameter Q;

[0434] The number of R2D messages that provide supplementary or updated information after paging;

[0435] Service type indicator.

[0436] In some embodiments, the third relevant information includes at least one of the following:

[0437] ACK / NACK feedback information;

[0438] Prefix information indicating D2R transmission;

[0439] D2R time-domain resource information;

[0440] Information related to D2R frequency domain resources;

[0441] Coding and modulation related information for D2R transmission;

[0442] D2R chip duration;

[0443] D2R information bit duration;

[0444] D2R small frequency offset factor;

[0445] The relevant information of the IoT device;

[0446] D2R Transport Block Size (TBS);

[0447] D2R transmission of duplicate indication information;

[0448] The size of the next D2R transport block sent to the reader device or the size of the remaining unsent D2R transport blocks.

[0449] In some embodiments, the ACK / NACK feedback information can be sent via L1 control information, and / or the ACK / NACK feedback information can be sent via higher-layer signaling;

[0450] The ACK / NACK feedback information supports at least one of the following methods:

[0451] If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, a NACK is sent back.

[0452] If the R2D message is not successfully received, a NACK is sent; if it is successfully received, no ACK / NACK is sent.

[0453] If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, no ACK / NACK is sent back.

[0454] If the R2D message is successfully received, an ACK is sent; if the R2D message is recognized but its content is not successfully decoded, a NACK is sent; if the R2D message is not recognized or the R2D data is not successfully received, no ACK / NACK is sent.

[0455] In some embodiments, the preamble information indicating D2R transmission includes at least one of pilot type, pilot quantity, and pilot position;

[0456] And / or,

[0457] The indication of D2R frequency domain resource-related information includes at least one of the following: frequency domain location indication of D2R transmission, length indication of continuously allocated frequency domain resources, and small frequency shift-related information indication of D2R transmission.

[0458] And / or,

[0459] The coding and modulation related information of the D2R transmission includes at least one of FEC indication information, CRC indication information, and modulation indication information;

[0460] And / or,

[0461] The D2R time-domain resource-related information includes at least one of the following: the start point of the D2R transmission time-domain resource, the duration of the time-domain resource, and the time-domain resource interval.

[0462] In some embodiments, the relevant information of the IoT device includes at least one of the following:

[0463] Equipment time accuracy, and / or time offset;

[0464] Equipment phase accuracy, and / or phase offset;

[0465] Equipment frequency offset capability, and / or, operating frequency range;

[0466] Energy status information of the equipment;

[0467] The IoT device related identifier and / or device type.

[0468] In some embodiments, the start point of the first time unit, and / or the start point of the second time unit;

[0469] The start point of the first time unit is indicated by the first time unit number, or by the number of first time units offset from the first reference time position;

[0470] The start point of the second time unit is indicated by a second time unit number, or by a time length offset from the second reference time position; or by an index of a time resource.

[0471] In some embodiments, the time-domain resource duration supports at least one of the following indication methods: a pre-configured method, an indication by the number of first time units, an indication by the number of second time units, or an indication by a time quantity; wherein the time quantity is determined by the number of pre-configured or predefined time units;

[0472] And / or,

[0473] The time-domain resource interval supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity; wherein the time quantity is determined by the number of pre-configured or predefined time units.

[0474] In some embodiments, the D2R time-domain resource-related information supports at least one of the following indication methods:

[0475] The first content indicates indication information related to D2R time-domain resources, wherein the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields;

[0476] The second content indicates the D2R time-domain resource allocation field value m, where the field value m represents the index of the (m+1)th row of the time-domain resource allocation table, and the (m+1)th row defines the indication information related to the D2R time-domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field.

[0477] The second content indicates the field value of the first information. The field value of the first information corresponds to the row index and column index of the resource mapping table. The row where the row index is located and the column where the column index is located define the indication information of the second information. The first information and the second information are different D2R time domain resource related information.

[0478] The D2R time-domain resource information is indicated by a joint indication of time-domain and frequency-domain resources;

[0479] The indication information related to D2R time-domain resources includes at least one of the following:

[0480] Time unit offset;

[0481] Start and length indicators;

[0482] Start time unit;

[0483] The length of time allocated, or the number of time units;

[0484] D2R type indication information;

[0485] Transport Block Size (TBS);

[0486] Used to determine the time length or number of time units of a TBS;

[0487] The ratio of R2D to D2R time units;

[0488] The number of repetitions used in D2R transmission;

[0489] Related information corresponding to time-domain resources.

[0490] In some embodiments, the D2R frequency domain resource-related information includes:

[0491] First frequency domain information, and / or, second frequency domain information;

[0492] The first frequency domain information includes at least one of the following: frequency domain location of D2R transmission, D2R frequency shift factor, and frequency domain location indication information;

[0493] The second frequency domain information includes: transmission bandwidth, D2R information bit rate, D2R chip rate, and transmission bandwidth size indication information.

[0494] In some embodiments, the indication method of the first frequency domain information includes at least one of the following:

[0495] Indicate the frequency location by indicating the starting frequency domain resource location;

[0496] A frequency offset (NSF) indicates the frequency offset from the carrier frequency.

[0497] Indicated by a frequency domain resource index;

[0498] Indirectly indicated by the frequency offset factor;

[0499] The indication method for the second frequency domain information includes at least one of the following:

[0500] Indicated by the number of frequency domain resource units allocated consecutively;

[0501] Indicated by bit duration;

[0502] Indicated by bit rate;

[0503] Indicated by chip duration and frequency shift factor;

[0504] Indicated by index tables and mapping relationships.

[0505] In some embodiments, the D2R frequency domain resource-related information supports at least one of the following indication methods:

[0506] The first content represents indication information related to D2R frequency domain resources, and the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields;

[0507] The second content indicates the D2R frequency domain resource allocation field value n, where the field value n represents the index of the (n+1)th row of the frequency domain resource allocation table, and the (n+1)th row defines the indication information related to the D2R frequency domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field.

[0508] A frequency domain resource block for D2R transmission allocated to the IoT device is indicated by a bit string and / or bitmap.

[0509] The D2R frequency domain resource information is indicated by a joint indication of time domain resources and frequency domain resources;

[0510] The indication information related to D2R frequency domain resources includes at least one of the following:

[0511] Starting position of frequency domain resources;

[0512] Indicator of the number of consecutively allocated frequency domain resource units;

[0513] Frequency offset factor used in D2R transmission;

[0514] The ratio of R2D to D2R frequency domain units;

[0515] Frequency domain resource unit start position and length;

[0516] Frequency domain resource start indicator and length indicator;

[0517] Related information for frequency domain resources.

[0518] In some embodiments, the D2R multiple access method includes: TDMA combined with FDMA, TDMA, and one of FDMA;

[0519] When the D2R multiple access method is TDMA, the first relevant information indicates multiple time-domain resources, and the number of time-domain resources is greater than or equal to the device data of the D2R multiple access.

[0520] When the D2R multiple access method is FDMA, the first relevant information indicates multiple frequency domain resources, and the number of frequency domain resources is greater than or equal to the device data of the D2R multiple access.

[0521] When the D2R multiple access method is TDMA combined with FDMA, the first relevant information indicates multiple time-domain resources and / or multiple frequency-domain resources, and the multiple time-domain resources and / or multiple frequency-domain resources are greater than or equal to the device data of the D2R multiple access.

[0522] In some embodiments, the indication method for transmitting D2R duplicate indication information includes at least one of the following:

[0523] Explicitly indicate the number of repetitions;

[0524] Indicates the repetition parameter and / or calculation rule type, which is used by the IoT device to determine the number of repetitions based on the calculation rule;

[0525] The number of repetitions in a set of repetitions is indirectly indicated by the index number and a set of repetition index tables.

[0526] In some embodiments, the IoT device-related identifier includes at least one of the following:

[0527] The IoT device's AS ID, the IoT device's device ID, the random number generated or reported by the IoT device, the random ID generated based on the random number reported by the IoT device, or other device-related identifiers;

[0528] The indication method for the IoT device related identifier includes: carrying the IoT device related identifier through PRDCH or PDRCH, and / or, a mask of the IoT device related identifier.

[0529] In some embodiments, the fourth relevant information includes at least one of the following:

[0530] High-level RRC signaling, indication information in L1 messages, downlink control information (DCI), and indication information in L2 messages.

[0531] In some embodiments, the downlink control information is used to indicate information for intermediate nodes to perform NR communication with the base station or to perform AIoT communication with the IoT device, and the format configuration of the downlink control information supports at least one of the following:

[0532] The new DCI format is specifically designed for scheduling communication between the intermediate nodes and IoT devices;

[0533] The original DCI format for communication between the intermediate node and NR is reused.

[0534] In some embodiments, the downlink control information indicates at least one of the following:

[0535] UL time and frequency resource indication information;

[0536] Time and frequency resource indication information for intermediate nodes during AIoT transmission;

[0537] AIOT CW frequency domain resource indication information and start or stop indication;

[0538] Priority or timing indication for NR and AIoT transmissions;

[0539] Does the intermediate node support AIoT transmission in the RRC state?

[0540] In some embodiments, the UL time-frequency resource indication information includes: time-frequency resources of UL data, and / or, time-frequency resources of UL control information;

[0541] The time-frequency resources of the UL control information include: time-domain or frequency-domain resource indications reported by NR communication feedback information, and / or, time-domain or frequency-domain resource indications reported by AIOT communication feedback information;

[0542] The time-domain resource indication of the AIOT communication feedback information reporting includes: AIOT feedback timing indicator, which is used to indicate the time between the Physical Downlink Control Channel (PDCCH) and the NR uplink feedback information reporting containing AIOT transmission related information.

[0543] In some embodiments, the time-frequency resource indication information for the intermediate node's AIoT transmission process includes: an indication of the resource configuration mode for the AIoT transmission, and / or an indication of the time-frequency domain resources for the AIoT transmission;

[0544] The resource configuration mode for instructing the AIoT transmission includes at least one of the following: supporting random access, resource indication under dynamic resource allocation mode, activation and deactivation of configuration resources under semi-static resource allocation Type2 mode;

[0545] The time-frequency domain resources indicating the AIOT transmission include at least one of: R2D time-frequency resources, D2R time-frequency resources, and R2D and D2R time-frequency resources, wherein the time-frequency domain resources of the AIOT transmission include: one or more sets of time-frequency resources, and / or one or more time-frequency resources corresponding to the associated information corresponding to each AIOT time-frequency resource.

[0546] In some embodiments, the fifth relevant information includes at least one of the following:

[0547] Feedback information, CSI reports, and scheduling request information.

[0548] In some embodiments, the feedback information includes: HARQ-ACK / NACK feedback information for NR downlink messages, and / or, AIOT transmission-related feedback information; wherein, the AIOT transmission-related feedback information is used to report ACK / NACK information related to the intermediate node communicating with the IoT device as a reader / writer device;

[0549] And / or,

[0550] The CSI report is generated by the UE using a CSI-RS sequence for NR downlink channel state information measurement.

[0551] And / or,

[0552] The scheduling request information is carried in the UCI. The scheduling request information is used to request the base station to allocate resources for the intermediate node to report AIoT communication data transmission to the base station, and / or to allocate resources for AIoT transmission with the IoT device.

[0553] In some embodiments, the format of the feedback information related to AIoT transmission includes: one bit for reporting feedback information of AIoT communication, and / or one or more bits for reporting feedback information of AIoT communication corresponding to each IoT device;

[0554] The configuration method for the feedback information includes at least one of the following:

[0555] Within a set of D2R receiving opportunities, if at least one D2R message sent by the IoT device is received in at least one opportunity, then the feedback information reporting resource associated with at least one IoT device is used to generate an ACK message corresponding to at least one IoT device; if no D2R message is received within a set of D2R receiving opportunities, then a NACK message is generated.

[0556] Within a set of D2R reception opportunities, if D2R messages from one or more IoT devices or all IoT devices in a group of IoT devices are received, an ACK message corresponding to the group's resources is generated; if D2R messages from all IoT devices are not received within a set of D2R reception opportunities, a NACK message is generated.

[0557] Supports pre-configured ACK / NACK response mechanisms corresponding to AIoT service types, or supports ACK / NACK response mechanisms corresponding to AIoT service types based on control information or higher-level signaling instructions.

[0558] Specific limitations regarding reader / writer devices and IoT devices can be found in the above section on message transmission methods, and will not be repeated here. The modules in the aforementioned reader / writer devices and IoT devices can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in a computer device, or stored in software within the memory of a computer device, so that the processor can invoke and execute the corresponding operations of each module.

[0559] In one embodiment, such as Figure 9 As shown, a communication device includes: a memory 901, a transceiver 902, and a processor 903.

[0560] The memory 901 is used to store computer programs; the transceiver 903 is used to send and receive data under the control of the processor; the processor 903 is used to read the computer program in the memory 901 and execute the steps of the message transmission method executed by the reader device or the Internet of Things device.

[0561] In the case where the communication device is a reader / writer device, the processor 903 described above is used to read the computer program in the memory 901 and perform the following operations: sending an R2D message to an IoT device, the R2D message including: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process; receiving a D2R message sent by an IoT device, the D2R message including third relevant information for indicating the D2R transmission process.

[0562] In some embodiments, the reader device is an intermediate node, and the processor 903 described above is further configured to: read the computer program in the memory 901 and perform the following operations: receive a third message sent by the base station, the third message including: fourth relevant information for instructing the intermediate node to communicate with the base station and / or with the Internet of Things device; send a fourth message to the base station based on the fourth relevant information, the fourth message including: fifth relevant information for feedback on the intermediate node's communication with the base station and / or with the Internet of Things device.

[0563] In the case where the communication device is an Internet of Things (IoT) device, the processor 903 described above is further configured to: receive an R2D message sent by the reader device, the R2D message including: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process; and send a D2R message to the receiving reader device, the D2R message including third relevant information for indicating the D2R transmission process.

[0564] exist Figure 9 When the communication device shown includes a reader / writer device and / or an Internet of Things (IoT) device, the content involved may also include, but is not limited to, the content in some of the following embodiments:

[0565] In some embodiments, the indication of the first relevant information and / or the second relevant information supports at least one of the following:

[0566] The formats of physical layer information, higher layer information, and control information;

[0567] The physical layer information includes: control information, and / or data information. The control information indicates: the content of the control information, and / or the format of the control information. The format of the control information uses different CRC scrambling methods. The higher layer information includes at least one of MAC CE, MAC PDU, and RRC signaling.

[0568] In some embodiments, the first relevant information includes at least one of the following:

[0569] D2R time-domain resource information;

[0570] Information related to D2R frequency domain resources;

[0571] D2R type indication information;

[0572] D2R chip duration;

[0573] D2R information bit duration;

[0574] D2R small frequency offset factor;

[0575] D2R multiple access methods and number of devices;

[0576] Information related to D2R coding and modulation;

[0577] D2R transport block size;

[0578] D2R transmission of duplicate indication information;

[0579] Associated information corresponding to AIoT time-frequency resources, wherein the time-frequency resources include: time-domain resources, and / or, frequency-domain resources;

[0580] Prefix information indicating D2R transmission;

[0581] D2R transmission complete.

[0582] In some embodiments, the second relevant information includes at least one of the following:

[0583] R2D frequency domain resource information;

[0584] Information related to R2D coding and modulation;

[0585] R2D Transport Block Size (TBS);

[0586] R2D transmission complete;

[0587] The duration of the chip in R2D transmission;

[0588] The reader / writer device related identification;

[0589] Random access opportunity indicator parameter Q;

[0590] The number of R2D messages that provide supplementary or updated information after paging;

[0591] Service type indicator.

[0592] In some embodiments, the third relevant information includes at least one of the following:

[0593] ACK / NACK feedback information;

[0594] Prefix information indicating D2R transmission;

[0595] D2R time-domain resource information;

[0596] Information related to D2R frequency domain resources;

[0597] Coding and modulation related information for D2R transmission;

[0598] D2R chip duration;

[0599] D2R information bit duration;

[0600] D2R small frequency offset factor;

[0601] The relevant information of the IoT device;

[0602] D2R Transport Block Size (TBS);

[0603] D2R transmission of duplicate indication information;

[0604] The size of the next D2R transport block sent to the reader device or the size of the remaining unsent D2R transport blocks.

[0605] In some embodiments, the ACK / NACK feedback information can be sent via L1 control information, and / or the ACK / NACK feedback information can be sent via higher-layer signaling;

[0606] The ACK / NACK feedback information supports at least one of the following methods:

[0607] If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, a NACK is sent back.

[0608] If the R2D message is not successfully received, a NACK is sent; if it is successfully received, no ACK / NACK is sent.

[0609] If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, no ACK / NACK is sent back.

[0610] If the R2D message is successfully received, an ACK is sent; if the R2D message is recognized but its content is not successfully decoded, a NACK is sent; if the R2D message is not recognized or the R2D data is not successfully received, no ACK / NACK is sent.

[0611] In some embodiments, the preamble information indicating D2R transmission includes at least one of pilot type, pilot quantity, and pilot position;

[0612] And / or,

[0613] The indication of D2R frequency domain resource-related information includes at least one of the following: frequency domain location indication of D2R transmission, length indication of continuously allocated frequency domain resources, and small frequency shift-related information indication of D2R transmission.

[0614] And / or,

[0615] The coding and modulation related information of the D2R transmission includes at least one of FEC indication information, CRC indication information, and modulation indication information;

[0616] And / or,

[0617] The D2R time-domain resource-related information includes at least one of the following: the start point of the D2R transmission time-domain resource, the duration of the time-domain resource, and the time-domain resource interval.

[0618] In some embodiments, the relevant information of the IoT device includes at least one of the following:

[0619] Equipment time accuracy, and / or time offset;

[0620] Equipment phase accuracy, and / or phase offset;

[0621] Equipment frequency offset capability, and / or, operating frequency range;

[0622] Energy status information of the equipment;

[0623] The IoT device related identifier and / or device type.

[0624] In some embodiments, the start point of the first time unit, and / or the start point of the second time unit;

[0625] The start point of the first time unit is indicated by the first time unit number, or by the number of first time units offset from the first reference time position;

[0626] The start point of the second time unit is indicated by a second time unit number, or by a time length offset from the second reference time position; or by an index of a time resource.

[0627] In some embodiments, the time-domain resource duration supports at least one of the following indication methods: a pre-configured method, an indication by the number of first time units, an indication by the number of second time units, or an indication by a time quantity; wherein the time quantity is determined by the number of pre-configured or predefined time units;

[0628] And / or,

[0629] The time-domain resource interval supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity; wherein the time quantity is determined by the number of pre-configured or predefined time units.

[0630] In some embodiments, the D2R time-domain resource-related information supports at least one of the following indication methods:

[0631] The first content indicates indication information related to D2R time-domain resources, wherein the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields;

[0632] The second content indicates the D2R time-domain resource allocation field value m, where the field value m represents the index of the (m+1)th row of the time-domain resource allocation table, and the (m+1)th row defines the indication information related to the D2R time-domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field.

[0633] The second content indicates the field value of the first information. The field value of the first information corresponds to the row index and column index of the resource mapping table. The row where the row index is located and the column where the column index is located define the indication information of the second information. The first information and the second information are different D2R time domain resource related information.

[0634] The D2R time-domain resource information is indicated by a joint indication of time-domain and frequency-domain resources;

[0635] The indication information related to D2R time-domain resources includes at least one of the following:

[0636] Time unit offset;

[0637] Start and length indicators;

[0638] Start time unit;

[0639] The length of time allocated, or the number of time units;

[0640] D2R type indication information;

[0641] Transport Block Size (TBS);

[0642] Used to determine the time length or number of time units of a TBS;

[0643] The ratio of R2D to D2R time units;

[0644] The number of repetitions used in D2R transmission;

[0645] Related information corresponding to time-domain resources.

[0646] In some embodiments, the D2R frequency domain resource-related information includes:

[0647] First frequency domain information, and / or, second frequency domain information;

[0648] The first frequency domain information includes at least one of the following: frequency domain location of D2R transmission, D2R frequency shift factor, and frequency domain location indication information;

[0649] The second frequency domain information includes: transmission bandwidth, D2R information bit rate, D2R chip rate, and transmission bandwidth size indication information.

[0650] In some embodiments, the indication method of the first frequency domain information includes at least one of the following:

[0651] Indicate the frequency location by indicating the starting frequency domain resource location;

[0652] A frequency offset (NSF) indicates the frequency offset from the carrier frequency.

[0653] Indicated by a frequency domain resource index;

[0654] Indirectly indicated by the frequency offset factor;

[0655] The indication method for the second frequency domain information includes at least one of the following:

[0656] Indicated by the number of frequency domain resource units allocated consecutively;

[0657] Indicated by bit duration;

[0658] Indicated by bit rate;

[0659] Indicated by chip duration and frequency shift factor;

[0660] Indicated by index tables and mapping relationships.

[0661] In some embodiments, the D2R frequency domain resource-related information supports at least one of the following indication methods:

[0662] The first content represents indication information related to D2R frequency domain resources, and the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields;

[0663] The second content indicates the D2R frequency domain resource allocation field value n, where the field value n represents the index of the (n+1)th row of the frequency domain resource allocation table, and the (n+1)th row defines the indication information related to the D2R frequency domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field.

[0664] A frequency domain resource block for D2R transmission allocated to the IoT device is indicated by a bit string and / or bitmap.

[0665] The D2R frequency domain resource information is indicated by a joint indication of time domain resources and frequency domain resources;

[0666] The indication information related to D2R frequency domain resources includes at least one of the following:

[0667] Starting position of frequency domain resources;

[0668] Indicator of the number of consecutively allocated frequency domain resource units;

[0669] Frequency offset factor used in D2R transmission;

[0670] The ratio of R2D to D2R frequency domain units;

[0671] Frequency domain resource unit start position and length;

[0672] Frequency domain resource start indicator and length indicator;

[0673] Related information for frequency domain resources.

[0674] In some embodiments, the D2R multiple access method includes: TDMA combined with FDMA, TDMA, and one of FDMA;

[0675] When the D2R multiple access method is TDMA, the first relevant information indicates multiple time-domain resources, and the number of time-domain resources is greater than or equal to the device data of the D2R multiple access.

[0676] When the D2R multiple access method is FDMA, the first relevant information indicates multiple frequency domain resources, and the number of frequency domain resources is greater than or equal to the device data of the D2R multiple access.

[0677] When the D2R multiple access method is TDMA combined with FDMA, the first relevant information indicates multiple time-domain resources and / or multiple frequency-domain resources, and the multiple time-domain resources and / or multiple frequency-domain resources are greater than or equal to the device data of the D2R multiple access.

[0678] In some embodiments, the indication method for transmitting D2R duplicate indication information includes at least one of the following:

[0679] Explicitly indicate the number of repetitions;

[0680] Indicates the repetition parameter and / or calculation rule type, which is used by the IoT device to determine the number of repetitions based on the calculation rule;

[0681] The number of repetitions in a set of repetitions is indirectly indicated by the index number and a set of repetition index tables.

[0682] In some embodiments, the IoT device-related identifier includes at least one of the following:

[0683] The IoT device's AS ID, the IoT device's device ID, the random number generated or reported by the IoT device, the random ID generated based on the random number reported by the IoT device, or other device-related identifiers;

[0684] The indication method for the IoT device related identifier includes: carrying the IoT device related identifier through PRDCH or PDRCH, and / or, a mask of the IoT device related identifier.

[0685] In some embodiments, the fourth relevant information includes at least one of the following:

[0686] High-level RRC signaling, indication information in L1 messages, downlink control information (DCI), and indication information in L2 messages.

[0687] In some embodiments, the DCI is used to indicate information for intermediate nodes to communicate with the base station via NR or with the IoT device via AIoT. The format configuration of the DCI supports at least one of the following:

[0688] The new DCI format is specifically designed for scheduling communication between the intermediate nodes and IoT devices;

[0689] The original DCI format for communication between the intermediate node and NR is reused.

[0690] In some embodiments, the downlink control information indicates at least one of the following:

[0691] UL time and frequency resource indication information;

[0692] Time and frequency resource indication information for intermediate nodes during AIoT transmission;

[0693] AIOT CW frequency domain resource indication information and start or stop indication;

[0694] Priority or timing indication for NR and AIoT transmissions;

[0695] Does the intermediate node support AIoT transmission in the RRC state?

[0696] In some embodiments, the UL time-frequency resource indication information includes: time-frequency resources of UL data, and / or, time-frequency resources of UL control information;

[0697] The time-frequency resources of the UL control information include: time-domain or frequency-domain resource indications reported by NR communication feedback information, and / or, time-domain or frequency-domain resource indications reported by AIOT communication feedback information;

[0698] The time-domain resource indication of the AIOT communication feedback information reporting includes: AIOT feedback timing indicator, which is used to indicate the time between the Physical Downlink Control Channel (PDCCH) and the NR uplink feedback information reporting containing AIOT transmission related information.

[0699] In some embodiments, the time-frequency resource indication information for the intermediate node's AIoT transmission process includes: an indication of the resource configuration mode for the AIoT transmission, and / or an indication of the time-frequency domain resources for the AIoT transmission;

[0700] The resource configuration mode for instructing the AIoT transmission includes at least one of the following: supporting random access, resource indication under dynamic resource allocation mode, activation and deactivation of configuration resources under semi-static resource allocation Type2 mode;

[0701] The time-frequency domain resources indicating the AIOT transmission include at least one of: R2D time-frequency resources, D2R time-frequency resources, and R2D and D2R time-frequency resources, wherein the time-frequency domain resources of the AIOT transmission include: one or more sets of time-frequency resources, and / or one or more time-frequency resources corresponding to the associated information corresponding to each AIOT time-frequency resource.

[0702] In some embodiments, the fifth relevant information includes at least one of the following:

[0703] Feedback information, CSI reports, and scheduling request information.

[0704] In some embodiments, the feedback information includes: HARQ-ACK / NACK feedback information for NR downlink messages, and / or, AIOT transmission-related feedback information; wherein, the AIOT transmission-related feedback information is used to report ACK / NACK information related to the intermediate node communicating with the IoT device as a reader / writer device;

[0705] And / or,

[0706] The CSI report is generated by the UE using a CSI-RS sequence for NR downlink channel state information measurement.

[0707] And / or,

[0708] The scheduling request information is carried in the UCI. The scheduling request information is used to request the base station to allocate resources for the intermediate node to report AIoT communication data transmission to the base station, and / or to allocate resources for AIoT transmission with the IoT device.

[0709] In some embodiments, the format of the feedback information related to AIoT transmission includes: one bit for reporting feedback information of AIoT communication, and / or one or more bits for reporting feedback information of AIoT communication corresponding to each IoT device;

[0710] The configuration method for the feedback information includes at least one of the following:

[0711] Within a set of D2R receiving opportunities, if at least one D2R message sent by the IoT device is received in at least one opportunity, then the feedback information reporting resource associated with at least one IoT device is used to generate an ACK message corresponding to at least one IoT device; if no D2R message is received within a set of D2R receiving opportunities, then a NACK message is generated.

[0712] Within a set of D2R reception opportunities, if D2R messages from one or more IoT devices or all IoT devices in a group of IoT devices are received, an ACK message corresponding to the group's resources is generated; if D2R messages from all IoT devices are not received within a set of D2R reception opportunities, a NACK message is generated.

[0713] Supports pre-configured ACK / NACK response mechanisms corresponding to AIoT service types, or supports ACK / NACK response mechanisms corresponding to AIoT service types based on control information or higher-level signaling instructions.

[0714] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the message transmission method performed by the reader device or Internet of Things device described above.

[0715] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to implement the steps of the message transmission method performed by the reader / writer device or IoT device described above.

[0716] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0717] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0718] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A message transmission method, characterized in that, Applied to reader / writer devices, including: Sending an R2D message to an IoT device, the R2D message including: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process; Receive D2R messages sent by IoT devices, the D2R messages including third relevant information for indicating the D2R transmission process.

2. The method according to claim 1, characterized in that, The indications of the first relevant information and / or the second relevant information support at least one of the following: The formats of physical layer information, higher layer information, and control information; The physical layer information includes: control information, and / or data information. The control information indicates: the content of the control information, and / or the format of the control information. The format of the control information uses different CRC scrambling methods. The higher layer information includes at least one of MAC CE, MAC PDU, and RRC signaling.

3. The method according to claim 1, characterized in that, The first relevant information includes at least one of the following: D2R time-domain resource information; Information related to D2R frequency domain resources; D2R type indication information; D2R chip duration; D2R information bit duration; D2R small frequency offset factor; D2R multiple access methods and number of devices; Information related to D2R coding and modulation; D2R transport block size; D2R transmission of duplicate indication information; Associated information corresponding to AIoT time-frequency resources, wherein the time-frequency resources include: time-domain resources, and / or, frequency-domain resources; Prefix information indicating D2R transmission; D2R transmission complete.

4. The method according to claim 1, characterized in that, The second relevant information includes at least one of the following: R2D frequency domain resource information; Information related to R2D coding and modulation; R2D Transport Block Size (TBS); R2D transmission complete; The duration of the chip in R2D transmission; The reader / writer device related identification; Random access opportunity indicator parameter Q; The number of R2D messages that provide supplementary or updated information after paging; Service type indicator.

5. The method according to claim 1, characterized in that, The third relevant information includes at least one of the following: ACK / NACK feedback information; Prefix information indicating D2R transmission; D2R time-domain resource information; Information related to D2R frequency domain resources; Coding and modulation related information for D2R transmission; D2R chip duration; D2R information bit duration; D2R small frequency offset factor; The relevant information of the IoT device; D2R Transport Block Size (TBS); D2R transmission of duplicate indication information; The size of the next D2R transfer block sent to the reader device; Size of remaining unsent D2R transport blocks.

6. The method according to claim 5, characterized in that, The ACK / NACK feedback information can be sent via L1 control information, and / or the ACK / NACK feedback information can be sent via higher-layer signaling; The ACK / NACK feedback information supports at least one of the following methods: If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, a NACK is sent back. If the R2D message is not successfully received, a NACK is sent; if it is successfully received, no ACK / NACK is sent. If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, no ACK / NACK is sent back. If the R2D message is successfully received, an ACK is sent; if the R2D message is recognized but its content is not successfully decoded, a NACK is sent; if the R2D message is not recognized or the R2D data is not successfully received, no ACK / NACK is sent.

7. The method according to claim 3 or 5, characterized in that, The preamble information indicating D2R transmission includes at least one of pilot type, pilot quantity, and pilot position; And / or, The indication of D2R frequency domain resource-related information includes at least one of the following: frequency domain location indication of D2R transmission, length indication of continuously allocated frequency domain resources, and small frequency shift-related information indication of D2R transmission. And / or, The coding and modulation related information of the D2R transmission includes at least one of FEC indication information, CRC indication information, and modulation indication information; And / or, The relevant information of the IoT device includes at least one of the following: Equipment time accuracy, and / or time offset; Equipment phase accuracy, and / or phase offset; Equipment frequency offset capability, and / or, operating frequency range; Energy status information of the equipment; The IoT device related identifier and / or device type.

8. The method according to claim 3, characterized in that, The D2R time-domain resource-related information includes at least one of the following: the start point of the D2R transmission time-domain resource, the duration of the time-domain resource, and the time-domain resource interval.

9. The method according to claim 8, characterized in that, The starting point of the time domain resource includes: the starting point of the first time unit, and / or, the starting point of the second time unit; The start point of the first time unit is indicated by the first time unit number, or by the number of first time units offset from the first reference time position; The start point of the second time unit is indicated by a second time unit number, or by a time length offset from the second reference time position; or by an index of a time resource.

10. The method according to claim 8, characterized in that, The time domain resource duration supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity; wherein, the time quantity is determined by the number of pre-configured or predefined time units; And / or, The time-domain resource interval supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity; wherein the time quantity is determined by the number of pre-configured or predefined time units.

11. The method according to claim 3, characterized in that, The D2R time-domain resource-related information supports at least one of the following indication methods: The first content indicates indication information related to D2R time-domain resources, wherein the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields; The second content indicates the D2R time-domain resource allocation field value m, where the field value m represents the index of the (m+1)th row of the time-domain resource allocation table, and the (m+1)th row defines the indication information related to the D2R time-domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field. The second content indicates the field value of the first information. The field value of the first information corresponds to the row index and column index of the resource mapping table. The row where the row index is located and the column where the column index is located define the indication information of the second information. The first information and the second information are different D2R time domain resource related information. The D2R time-domain resource information is indicated by a joint indication of time-domain and frequency-domain resources; The indication information related to D2R time-domain resources includes at least one of the following: Time unit offset; Start and length indicators; Start time unit; The length of time allocated, or the number of time units; D2R type indication information; Transport Block Size (TBS); Used to determine the duration or number of time units of a TBS; The ratio of R2D to D2R time units; The number of repetitions used in D2R transmission; Related information corresponding to time-domain resources.

12. The method according to claim 3 or 5, characterized in that, The D2R frequency domain resource information includes: First frequency domain information, and / or, second frequency domain information; The first frequency domain information includes at least one of the following: frequency domain location of D2R transmission, D2R frequency shift factor, and frequency domain location indication information; The second frequency domain information includes: transmission bandwidth, D2R information bit rate, D2R chip rate, and transmission bandwidth size indication information.

13. The method according to claim 12, characterized in that, The indication method for the first frequency domain information includes at least one of the following: Indicate the frequency location by indicating the starting frequency domain resource location; A frequency offset (NSF) indicates the frequency offset from the carrier frequency. Indicated by a frequency domain resource index; Indirectly indicated by the frequency offset factor; The indication method for the second frequency domain information includes at least one of the following: Indicated by the number of frequency domain resource units allocated consecutively; Indicated by bit duration; Indicated by bit rate; Indicated by chip duration and frequency shift factor; Indicated by index tables and mapping relationships.

14. The method according to claim 3 or 5, characterized in that, The D2R frequency domain resource-related information supports at least one of the following indication methods: The first content represents indication information related to D2R frequency domain resources, and the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields; The second content indicates the D2R frequency domain resource allocation field value n, where the field value n represents the index of the (n+1)th row of the frequency domain resource allocation table, and the (n+1)th row defines the indication information related to the D2R frequency domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field. The frequency domain resource block allocated to the D2R transmission of the IoT device is indicated by a bit string and / or bitmap. The D2R frequency domain resource information is indicated by a joint indication of time domain resources and frequency domain resources; The indication information related to D2R frequency domain resources includes at least one of the following: Starting position of frequency domain resources; Indicator of the number of consecutively allocated frequency domain resource units; Frequency offset factor used in D2R transmission; The ratio of R2D to D2R frequency domain units; Frequency domain resource unit start position and length; Frequency domain resource start indicator and length indicator; Related information for frequency domain resources.

15. The method according to claim 3, characterized in that, The D2R multiple access method includes: TDMA combined with FDMA, TDMA, and one of FDMA; When the D2R multiple access method is TDMA, the first relevant information indicates multiple time-domain resources, and the number of time-domain resources is greater than or equal to the device data of the D2R multiple access. When the D2R multiple access method is FDMA, the first relevant information indicates multiple frequency domain resources, and the number of frequency domain resources is greater than or equal to the device data of the D2R multiple access. When the D2R multiple access method is TDMA combined with FDMA, the first relevant information indicates multiple time-domain resources and / or multiple frequency-domain resources, and the multiple time-domain resources and / or multiple frequency-domain resources are greater than or equal to the device data of the D2R multiple access.

16. The method according to claim 3 or 5, characterized in that, The indication method for transmitting D2R duplicate indication information includes at least one of the following: Explicitly indicate the number of repetitions; Indicates the repetition parameter and / or calculation rule type, which is used by the IoT device to determine the number of repetitions based on the calculation rule; The number of repetitions in a set of repetitions is indirectly indicated by the index number and a set of repetition index tables.

17. The method according to claim 8, characterized in that, The IoT device-related identifier includes at least one of the following: The IoT device's AS ID, the IoT device's device ID, the random number generated or reported by the IoT device, the random ID generated based on the random number reported by the IoT device, or other device-related identifiers; The indication method for the IoT device related identifier includes: carrying the IoT device related identifier through PRDCH or PDRCH, and / or, a mask of the IoT device related identifier.

18. The method according to any one of claims 1 to 6, characterized in that, The reader / writer device is an intermediate node, and the method further includes: The intermediate node receives a third message sent by the base station, the third message including: fourth relevant information for instructing the intermediate node to communicate with the base station and / or with IoT devices; A fourth message is sent to the base station based on the fourth relevant information, the fourth message including: a fifth relevant information for feedback on communication between the intermediate node and the base station and / or with IoT devices.

19. The method according to claim 18, characterized in that, The fourth relevant information includes at least one of the following: High-level RRC signaling, indication information in L1 messages, downlink control information (DCI), and indication information in L2 messages.

20. The method according to claim 19, characterized in that, The DCI is used to indicate information for intermediate nodes to communicate with the base station via NR or with the IoT device via AIoT. The format configuration of the DCI supports at least one of the following: The new DCI format is specifically designed for scheduling communication between the intermediate nodes and IoT devices; The original DCI format for communication between the intermediate node and NR is reused.

21. The method according to claim 20, characterized in that, The DCI indicates at least one of the following information: UL time and frequency resource indication information; Time and frequency resource indication information for intermediate nodes during AIoT transmission; AIOT CW frequency domain resource indication information and start or stop indication; Priority or timing indication for NR and AIoT transmissions; Does the intermediate node support AIoT transmission in RRC state? 22. The method according to claim 21, characterized in that, The UL time-frequency resource indication information includes: the time-frequency resources of UL data, and / or, the time-frequency resources of UL control information; The time-frequency resources of the UL control information include: time-domain or frequency-domain resource indications reported by NR communication feedback information, and / or, time-domain or frequency-domain resource indications reported by AIOT communication feedback information; The time-domain resource indication for the feedback information reporting of the AIOT communication includes: an AIOT feedback timing indicator, which is used to indicate the time between the PDCCH and the NR uplink feedback information reporting containing AIOT transmission-related information.

23. The method according to claim 21, characterized in that, The time-frequency resource indication information for the intermediate node's AIoT transmission process includes: indicating the resource configuration mode of the AIoT transmission, and / or indicating the time-frequency resources of the AIoT transmission; The resource configuration mode for instructing the AIoT transmission includes at least one of the following: supporting random access, resource indication under dynamic resource allocation mode, activation and deactivation of configuration resources under semi-static resource allocation Type2 mode; The time-frequency resources indicating the AIOT transmission include at least one of: R2D time-frequency resources, D2R time-frequency resources, and R2D and D2R time-frequency resources, wherein the time-frequency resources for AIOT transmission include: one or more sets of time-frequency resources, and / or one or more time-frequency resources corresponding to the associated information of each time-frequency resource for AIOT transmission.

24. The method according to claim 18, characterized in that, The fifth relevant information includes at least one of the following: Feedback information, CSI reports, and scheduling request information.

25. The method according to claim 24, characterized in that, The feedback information includes: HARQ-ACK / NACK feedback information for NR downlink messages, and / or, AIOT transmission-related feedback information; wherein, the AIOT transmission-related feedback information is used to report ACK / NACK information related to the intermediate node communicating with the IoT device as a reader / writer device; And / or, The CSI report is generated by the UE using a CSI-RS sequence for NR downlink channel state information measurement. And / or, The scheduling request information is carried in the UCI. The scheduling request information is used to request the base station to allocate resources for the intermediate node to report AIoT communication data transmission to the base station, and / or to allocate resources for AIoT transmission with the IoT device.

26. The method according to claim 25, characterized in that, The format of the feedback information related to AIoT transmission includes: one bit for reporting feedback information of AIoT communication, and / or one or more bits for reporting feedback information of AIoT communication corresponding to each IoT device; The configuration method for the feedback information includes at least one of the following: Within a set of D2R receiving opportunities, if at least one D2R message sent by the IoT device is received in at least one opportunity, then the feedback information reporting resource associated with at least one IoT device is used to generate an ACK message corresponding to at least one IoT device; if no D2R message is received within a set of D2R receiving opportunities, then a NACK message is generated. Within a set of D2R reception opportunities, if D2R messages from one or more IoT devices or all IoT devices in a group of IoT devices are received, an ACK message corresponding to the group's resources is generated; if D2R messages from all IoT devices are not received within a set of D2R reception opportunities, a NACK message is generated. Supports pre-configured ACK / NACK response mechanisms corresponding to AIoT service types, or supports ACK / NACK response mechanisms corresponding to AIoT service types based on control information or higher-level signaling instructions.

27. A message transmission method, characterized in that, Applied to IoT devices, including: Receive an R2D message sent by a reader device, the R2D message including: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process; A D2R message is sent to the receiving reader device, the D2R message including third relevant information for indicating the D2R transmission process.

28. The method according to claim 27, characterized in that, The indications of the first relevant information and / or the second relevant information support at least one of the following: The formats of physical layer information, higher layer information, and control information; The physical layer information includes: control information, and / or data information. The control information indicates: the content of the control information, and / or the format of the control information. The format of the control information uses different CRC scrambling methods. The higher layer information includes at least one of MAC CE, MAC PDU, and RRC signaling.

29. The method according to claim 27, characterized in that, The first relevant information includes at least one of the following: D2R time-domain resource information; Information related to D2R frequency domain resources; D2R type indication information; D2R chip duration; D2R information bit duration; D2R small frequency offset factor; D2R multiple access methods and number of devices; Information related to D2R coding and modulation; D2R transport block size; D2R transmission of duplicate indication information; Associated information corresponding to AIoT time-frequency resources, wherein the time-frequency resources include: time-domain resources, and / or, frequency-domain resources; Prefix information indicating D2R transmission; D2R transmission complete.

30. The method according to claim 27, characterized in that, The second relevant information includes at least one of the following: R2D frequency domain resource information; Information related to R2D coding and modulation; R2D transport block size; R2D transmission complete; R2D chip duration; The reader / writer device related identification; Random access opportunity indicator parameter Q; The number of R2D messages that provide supplementary or updated information after paging; Service type indicator.

31. The method according to claim 27, characterized in that, The third relevant information includes at least one of the following: ACK / NACK feedback information; Prefix information indicating D2R transmission; D2R time-domain resource information; Information related to D2R frequency domain resources; Coding and modulation related information for D2R transmission; D2R chip duration; D2Rbit duration; D2R small frequency offset factor; The relevant information of the IoT device; D2R transport block size; D2R transmission of duplicate indication information: The size of the next D2R transport block sent to the reader device or the size of the remaining unsent D2R transport blocks.

32. The method according to claim 31, characterized in that, The ACK / NACK feedback information can be sent via L1 control information, and / or the ACK / NACK feedback information can be sent via higher-layer signaling; The ACK / NACK feedback information supports at least one of the following methods: If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, a NACK is sent back. If the R2D message is not successfully received, a NACK is sent; if it is successfully received, no ACK / NACK is sent. If the R2D message is successfully received, an ACK is sent back; if the R2D message is not successfully received, no ACK / NACK is sent back. If the R2D message is successfully received, an ACK is sent; if the R2D message is recognized but its content is not successfully decoded, a NACK is sent; if the R2D message is not recognized or the R2D data is not successfully received, no ACK / NACK is sent.

33. The method according to claim 29 or 31, characterized in that, The preamble information indicating D2R transmission includes at least one of pilot type, pilot quantity, and pilot position; And / or, The indication of D2R frequency domain resource-related information includes at least one of the following: frequency domain location indication of D2R transmission, length indication of continuously allocated frequency domain resources, and small frequency shift-related information indication of D2R transmission. And / or, The coding and modulation related information of the D2R transmission includes at least one of FEC indication information, CRC indication information, and modulation indication information; And / or, The relevant information of the IoT device includes at least one of the following: Equipment time accuracy, and / or time offset; Equipment phase accuracy, and / or phase offset; Equipment frequency offset capability, and / or, operating frequency range; Energy status information of the equipment; The IoT device related identifier and / or device type.

34. The method according to claim 29, characterized in that, The D2R time-domain resource-related information includes at least one of the following: the start point of the D2R transmission time-domain resource, the duration of the time-domain resource, and the time-domain resource interval.

35. The method according to claim 34, characterized in that, The starting point of the time domain resource includes: the starting point of the first time unit, and / or, the starting point of the second time unit; The start point of the first time unit is indicated by the first time unit number, or by the number of first time units offset from the first reference time position; The start point of the second time unit is indicated by a second time unit number, or by a time length offset from the second reference time position; or by an index of a time resource.

36. The method according to claim 34, characterized in that, The time domain resource duration supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity; wherein, the time quantity is determined by the number of pre-configured or predefined time units; And / or, The time-domain resource interval supports at least one of the following indication methods: pre-configured method, indication by the number of first time units, indication by the number of second time units, and indication by a time quantity; wherein, the time quantity is determined by the number of pre-configured or pre-defined time units, and the time units are determined based on the IoT device.

37. The method according to claim 29, characterized in that, The D2R time-domain resource-related information supports at least one of the following indication methods: The first content indicates indication information related to D2R time-domain resources, wherein the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields; The second content indicates the D2R time-domain resource allocation field value m, where the field value m represents the index of the (m+1)th row of the resource allocation table, and the (m+1)th row defines the indication information related to the D2R time-domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field. The second content indicates the field value of the first information. The field value corresponds to the row index and column index of the resource mapping table. The row where the row index is located and the column where the column index is located define the indication information of the second information. The first information and the second information are different D2R time domain resource related information. The D2R time-domain resource information is indicated by a joint indication of time-domain and frequency-domain resources; The indication information related to D2R time-domain resources includes at least one of the following: Time unit offset; Start and length indicators; Start time unit; The length of time allocated, or the number of time units; D2R type indication information; Transport Block Size (TBS); Used to determine the duration or number of time units of a TBS; The ratio of R2D to D2R time units; The number of repetitions used in D2R transmission; Related information corresponding to time-domain resources.

38. The method according to claim 29 or 31, characterized in that, The D2R frequency domain resource information includes: First frequency domain information, and / or, second frequency domain information; The first frequency domain information includes at least one of the following: frequency domain location of D2R transmission, D2R frequency shift factor, and frequency domain location indication information; The second frequency domain information includes: transmission bandwidth, D2R information bit rate, D2R chip rate, and transmission bandwidth size indication information.

39. The method according to claim 38, characterized in that, The indication method for the first frequency domain information includes at least one of the following: Indicate the frequency location by indicating the starting frequency domain resource location; A frequency offset (NSF) indicates the frequency offset from the carrier frequency. Indicated by a frequency domain resource index; Indirectly indicated by the frequency offset factor; The indication method for the second frequency domain information includes at least one of the following: Indicated by the number of frequency domain resource units allocated consecutively; Indicated by bit duration; Indicated by bit rate; Indicated by chip duration and frequency shift factor; Indicated by index tables and mapping relationships.

40. The method according to claim 29 or 31, characterized in that, The D2R frequency domain resource-related information supports at least one of the following indication methods: The first content represents indication information related to D2R frequency domain resources, and the first content includes at least one of one or more fields, one or more code points in one field, and one or more indication fields; The second content indicates the D2R frequency domain resource allocation field value n, where the field value n represents the index of the (n+1)th row of the resource allocation table, and the (n+1)th row defines the indication information related to the D2R frequency domain resources. The second content includes at least one of the following: a field, a code point in a field, and an indication field. The frequency domain resource block allocated to the D2R transmission of the IoT device is indicated by a bit string and / or bitmap. The D2R frequency domain resource information is indicated by a joint indication of time domain resources and frequency domain resources; The indication information related to D2R frequency domain resources includes at least one of the following: Starting position of frequency domain resources; Indicator of the number of consecutively allocated frequency domain resource units; Frequency offset factor used in D2R transmission; The ratio of R2D to D2R frequency domain units; Frequency domain resource unit start position and length; Frequency domain resource start indicator and length indicator; Related information for frequency domain resources.

41. The method according to claim 29, characterized in that, The D2R multiple access method includes: TDMA combined with FDMA, TDMA, and one of FDMA; When the D2R multiple access method is TDMA, the first relevant information indicates multiple time-domain resources, and the number of time-domain resources is greater than or equal to the device data of the D2R multiple access. When the D2R multiple access method is FDMA, the first relevant information indicates multiple frequency domain resources, and the number of frequency domain resources is greater than or equal to the device data of the D2R multiple access. When the D2R multiple access method is TDMA combined with FDMA, the first relevant information indicates multiple time-domain resources and / or multiple frequency-domain resources, and the multiple time-domain resources and / or multiple frequency-domain resources are greater than or equal to the device data of the D2R multiple access.

42. The method according to claim 29 or 31, characterized in that, The indication method for transmitting D2R duplicate indication information includes at least one of the following: Explicitly indicate the number of repetitions; Indicates the repetition parameter and / or calculation rule type, which is used by the IoT device to determine the number of repetitions based on the calculation rule; The number of repetitions in a set of repetitions is indirectly indicated by the index number and a set of repetition index tables.

43. The method according to claim 42, characterized in that, The IoT device-related identifier includes at least one of the following IDs: The IoT device's AS ID, the IoT device's device ID, the random number generated or reported by the IoT device, the random ID generated based on the random number reported by the IoT device, or other device-related identifiers; The indication method for the IoT device related identifier includes: carrying the IoT device related identifier through PRDCH or PDRCH, and / or, masking the IoT device related identifier.

44. A reader / writer device, characterized in that, include: A sending module is used to send R2D messages to IoT devices. The R2D messages include: first relevant information for indicating the D2R transmission process, and / or, second relevant information for indicating the R2D message transmission process. A receiving module is used to receive D2R messages sent by IoT devices, the D2R messages including third relevant information for indicating the D2R transmission process.

45. An Internet of Things (IoT) device, characterized in that, include: The receiving module is configured to receive R2D messages sent by the reader device, wherein the R2D messages include: first related information for indicating the D2R transmission process, and / or, second related information for indicating the R2D message transmission process; The sending module is configured to send a D2R message to the receiving reader device, the D2R message including third relevant information for indicating the D2R transmission process.

46. ​​A communication device, characterized in that, include: Memory, transceiver, processor: The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor. The processor is configured to read a computer program from the memory and execute the steps of the method as described in any one of claims 1 to 43.

47. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 43.

48. A chip, characterized in that, The chip includes programmable logic circuitry and / or program instructions, which, when the chip is running, implement the steps of the method described in any one of claims 1 to 43.

49. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the method described in any one of claims 1 to 43.

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