Data transmission method of Internet of Things equipment and related equipment

Abstract

The invention provides a data transmission method of Internet of Things equipment and related equipment, and relates to the technical field of wireless communication. The method comprises the following steps: when network side equipment performs R2D link transmission, inserting a cyclic prefix in front of each orthogonal frequency division multiplexing symbol; wherein the R2D link transmission comprises transmission of at least one of a physical layer transmission channel PRDCH from the network side equipment to the Internet of Things equipment, R2D control information, a physical layer control channel from the network side equipment to the Internet of Things equipment, a lead code, a back code, an intermediate sequence, a reference signal, broadcast information and paging information. According to the embodiment of the invention, inter-symbol interference generated by a multipath effect can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and in particular, to a data transmission method for Internet of Things (IoT) devices and related devices. Background Art

[0002] The environmental Internet of Things can obtain energy from the environment or radio frequency signals without relying on batteries to perform waveform modulation and transmission.

[0003] In related technologies, the 3GPP (3rd Generation Partnership Project) organization has not yet determined the transmission method for the R2D (Reader to Device) link of the environmental Internet of Things. Therefore, it is urgent to design a data transmission method suitable for environmental IoT devices.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The present disclosure provides a data transmission method for IoT devices and related devices, which can be used for the R2D link transmission of environmental IoT devices. By inserting a cyclic prefix (CP) during transmission, the inter-symbol interference caused by multipath effects is reduced.

[0006] Other features and advantages of the present disclosure will become apparent through the following detailed description, or will be learned in part through the practice of the present disclosure.

[0007] According to one aspect of the present disclosure, there is provided a data transmission method for IoT devices, which is executed by a network-side device and includes: when performing R2D link transmission from the network-side device to the IoT device, inserting a cyclic prefix before each orthogonal frequency division multiplexing symbol;

[0008] Wherein, the R2D link transmission includes the transmission of at least one of the physical layer data channel PRDCH from the network-side device to the IoT device, R2D control information, the physical layer control channel from the network-side device to the IoT device, preamble, postamble, intermediate sequence, reference signal, broadcast information, and paging information.

[0009] According to another aspect of the present disclosure, there is provided a data transmission method for IoT devices, including: when performing R2D link transmission from the network-side device to the IoT device, inserting a cyclic prefix before each orthogonal frequency division multiplexing symbol;

[0010] Among them, the R2D link transmission includes the transmission of at least one of the physical layer transmission channel PRDCH from the network side device to the Internet of Things device, R2D control information, the physical layer control channel from the network side device to the Internet of Things device, preamble, postamble, middle sequence, reference signal, broadcast information, and paging information.

[0011] According to another aspect of the present disclosure, there is provided a data transmission method for an Internet of Things device, which is executed by the Internet of Things device. The method includes: receiving data from a network side device through the R2D link transmission from the network side device to the Internet of Things device, and there is a cyclic prefix before each orthogonal frequency division multiplexing symbol in the R2D link transmission;

[0012] Among them, the R2D link transmission includes the transmission of at least one of the physical layer transmission channel PRDCH from the network side device to the Internet of Things device, R2D control information, the physical layer control channel from the network side device to the Internet of Things device, preamble, postamble, middle sequence, reference signal, broadcast information, and paging information.

[0013] According to another aspect of the present disclosure, there is provided a network side device, including: a prefix insertion module for inserting a cyclic prefix before each orthogonal frequency division multiplexing symbol when performing the R2D link transmission from the network side device to the Internet of Things device;

[0014] Among them, the R2D link transmission includes the transmission of at least one of the transmission channel from the network side device to the Internet of Things device, R2D control information, the physical layer control channel from the network side device to the Internet of Things device, preamble, postamble, middle sequence, reference signal, broadcast information, and paging information.

[0015] According to another aspect of the present disclosure, there is provided an Internet of Things device, including: a data receiving module for receiving data from a network side device through the R2D link transmission from the network side device to the Internet of Things device, and there is a cyclic prefix before each orthogonal frequency division multiplexing symbol in the R2D link transmission;

[0016] Among them, the R2D link transmission includes the transmission of at least one of the physical layer transmission channel PRDCH from the network side device to the Internet of Things device, R2D control information, the physical layer control channel from the network side device to the Internet of Things device, preamble, postamble, middle sequence, reference signal, broadcast information, and paging information.

[0017] According to another aspect of the present disclosure, there is provided a communication system, including the network side device of the above embodiment and the Internet of Things device of the above embodiment.

[0018] According to another aspect of the present disclosure, there is provided an electronic device, including: a memory for storing instructions; and a processor for invoking the instructions stored in the memory to implement the data transmission method of the above-mentioned Internet of Things device.

[0019] According to another aspect of the present disclosure, there is provided a computer-readable storage medium having computer instructions stored thereon, and when the computer instructions are executed by a processor, the data transmission method of the above-mentioned Internet of Things device is implemented.

[0020] According to another aspect of the present disclosure, there is provided a computer program product, where the computer program product stores instructions, and when the instructions are executed by a computer, the computer is caused to implement the data transmission method of the above-mentioned Internet of Things device.

[0021] According to another aspect of the present disclosure, there is provided a chip, including at least one processor and an interface;

[0022] The interface is used to provide program instructions or data for at least one processor;

[0023] At least one processor is used to execute program instructions to implement the data transmission method of the above-mentioned Internet of Things device.

[0024] The data transmission method and related devices of the Internet of Things device provided by the embodiments of the present disclosure can be applied to the R2D link transmission scenario of environmental Internet of Things devices. When the network-side device performs R2D link transmission, by inserting a cyclic prefix before each orthogonal frequency division multiplexing symbol, the inter-symbol interference caused by multipath effects can be reduced.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0027] Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Showing a schematic diagram of the architecture of a communication system in an embodiment of the present disclosure;

[0029] Figure 2 Showing a flowchart of a data transmission method of an Internet of Things device in an embodiment of the present disclosure;

[0030] Figure 2Shows a flowchart of another data transmission method for an Internet of Things device in an embodiment of the present disclosure;

[0031] Figure 3 Shows a flowchart of yet another data transmission method for an Internet of Things device in an embodiment of the present disclosure;

[0032] Figure 4 Shows a flowchart of still another data transmission method for an Internet of Things device in an embodiment of the present disclosure;

[0033] Figure 5 Shows a schematic diagram of a network - side device in an embodiment of the present disclosure;

[0034] Figure 6 Shows a schematic diagram of an Internet of Things device in an embodiment of the present disclosure;

[0035] Figure 7 Shows a schematic diagram of the architecture of another communication system in an embodiment of the present disclosure;

[0036] Figure 8 Shows a block diagram of the structure of an electronic device in an embodiment of the present disclosure. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present disclosure. Usually, the components of the embodiments of the present disclosure described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0038] For ease of understanding, before introducing the embodiments of the present disclosure, several terms involved in the embodiments of the present disclosure are explained as follows:

[0039] Ambient IoT: Environmental IoT, also known as ambient Internet of Things, without relying on batteries, power supplies, etc., obtains energy from the environment or radio frequency signals to perform its own waveform modulation and transmission.

[0040] Preamble: Preamble signal, also known as preamble synchronization code, or preamble, used to obtain the synchronization position in asynchronous transmission, generally located at the head of the transmitted signal.

[0041] Midamble: Midamble, also known as the mid - synchronization code or mid - sequence, is used to perform a synchronization correction or alignment in the middle of asynchronous transmission and is generally located in the middle of the transmitted signal.

[0042] Postamble: Postamble, also known as the post - synchronization code or post - code, is used to obtain the end position in asynchronous transmission and is generally located at the end of the transmitted signal.

[0043] Device: The Internet of Things device terminal, or the Internet of Things device, is used to perform waveform modulation and transmission on the energy in the acquired environmental or radio frequency signals.

[0044] R2D: Reader to Device link, representing the downlink from the network - side device to the Internet of Things device Device.

[0045] D2R: Device to Reader link, representing the uplink from the Internet of Things device Device to the network - side device.

[0046] PRDCH: Physical Reader to Device Channel, the physical - layer transmission channel from the network - side device to the Internet of Things device, and the transmission channel on the R2D link for transmitting downlink information.

[0047] PRDCCH: Physical Reader to Device Control Channel, the physical - layer control channel from the network - side device to the Internet of Things device.

[0048] PDRCH: Physical Device to Reader Channel, the transmission channel on the D2R link for transmitting uplink information.

[0049] CP: cyclic prefix, which is added to the head of the OFDM symbol to reduce inter - symbol interference.

[0050] The following will describe in detail the specific implementation manners of the embodiments of the present disclosure with reference to the accompanying drawings.

[0051] As Figure 1 shown, the system architecture includes: terminal 101 and network device 102; among them, terminal 101 interacts with network device 103 through network 102.

[0052] Terminal 101 can be referred to as a user equipment, terminal device, access device, user unit, user terminal, user device, etc.

[0053] In the embodiments of the present disclosure, the terminal 101 may also be a terminal device in an IoT system. The IoT can connect objects to the network, thereby realizing an intelligent network for human-computer interaction and object-to-object interconnection. For example, the terminal 101 can be understood as an Internet of Things device, or an Internet of Things device terminal. Specifically, it can be understood as an Ambient IoT terminal, or a Passive IoT device terminal. The terminal 101 may also be referred to as a UE (User Equipment).

[0054] In some embodiments, the network device 103 may be a base station, a relay, an access point, etc. The base station may be, but is not limited to, a base station of 5G and later versions (for example: gNB base station), or a base station in other communication systems (for example: eNB base station). It should be noted that the specific type of the network-side device is not limited in the embodiments of the present disclosure.

[0055] Those skilled in the art can know that Figure 1 the number of terminals and network-side devices in

[0056] Based on the background technology section, the embodiments of the present disclosure are applicable to data transmission of Ambient IoT devices, where the Ambient IoT devices may also be referred to as Internet of Things devices, Internet of Things terminals, or IoT devices.

[0057] In recent years, the IoT has received great attention. More Internet of Things terminals are trying to access the network, bringing convenience to life, but also posing challenges to the network access ability and the energy consumption and cost of devices. In the future, the number of Internet of Things terminals will show a huge explosive growth. It is impossible to install batteries in all IoT terminals and perform periodic maintenance and upkeep, which will lead to high maintenance costs and serious environmental problems, and is an unacceptable development direction for the Internet of Things.

[0058] In view of this, 3GPP has proposed the concept of Ambient IoT (A-IoT), which obtains energy from the environment or radio frequency signals without relying on batteries to perform its own waveform modulation and transmission. However, the 3GPP organization has not yet determined the R2D (Reader to Device, network-side device to Internet of Things device) link transmission method for Ambient IoT. How to design an R2D link transmission scheme for Internet of Things devices has become an urgent technical problem to be solved.

[0059] Under the above system architecture, in order to at least partially solve the above technical problems, a data transmission method for Internet of Things devices is provided in the embodiments of the present disclosure.

[0060] In some embodiments, the data transmission method of the Internet of Things (IoT) device provided in the embodiments of the present disclosure may be executed by the IoT device of the above system architecture; in other embodiments, the data transmission method of the IoT device provided in the embodiments of the present disclosure may be implemented by a network-side device (such as a base station) in the above system architecture; in other embodiments, the data transmission method of the IoT device provided in the embodiments of the present disclosure may also be achieved through the interaction between the network-side device and the IoT device.

[0061] Figure 2 The flowchart of a data transmission method of an IoT device in an embodiment of the present disclosure is shown, as Figure 2 shown, the data transmission method of the IoT device provided in the embodiments of the present disclosure includes step S201.

[0062] In S201, when performing the R2D link transmission from the network-side device to the IoT device, a cyclic prefix (CP) is inserted before each orthogonal frequency division multiplexing symbol;

[0063] wherein, the R2D link transmission includes the transmission of at least one of a physical layer transmission channel (Physical Reader to Device Channel, PRDCH) from the network-side device to the IoT device, R2D control information, a physical layer control channel (Physical Reader to Device Control Channel, PRDCCH) from the network-side device to the IoT device, a preamble, a postamble, a midamble, a reference signal, broadcast information, and paging information.

[0064] In some embodiments, the cyclic prefix (CP) is predefined, preconfigured, configured by a higher layer, and / or indicated by the physical layer, including the length of the cyclic prefix CP and / or the CP content (rule).

[0065] The length and content of the cyclic prefix (CP) may be predefined by the standards and specifications of the wireless communication system. These regulations may be given at different levels, including higher layer protocols and physical layer protocols. A higher layer protocol (such as the MAC layer or a new target layer) may configure the length of the cyclic prefix through a certain mechanism. The physical layer protocol (PHY layer) may directly define the specific implementation details of the cyclic prefix, including the length and content of the cyclic prefix. These indications may be fixed or dynamically adjusted according to specific conditions. It should be noted that the higher layer of A-IoT may only have the MAC layer, or may include a MAC layer and a new layer (which may also be called a new target layer). The higher layer has one or two layers, namely the MAC layer or the MAC layer and the new layer.

[0066] As an example, assume that an OFDM system uses a normal cyclic prefix (Normal CP) with a length of 1 / 14 of the symbol period, i.e., approximately 72 sample points (if the symbol length is 1024 sample points). The data transmission process of the Internet of Things device in the above embodiment can be as follows:

[0067] Generate OFDM symbol: Generate an OFDM symbol with 1024 sample points containing data;

[0068] Insert cyclic prefix: Copy the last 72 sample points of the OFDM symbol and place them in front of the symbol to form a complete OFDM symbol + CP sequence;

[0069] Transmit OFDM symbol: Transmit the complete symbol sequence containing the cyclic prefix through the wireless interface.

[0070] It can be understood that the above CP content can also be referred to as the CP rule.

[0071] In some embodiments, before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol, the data transmission method of the above Internet of Things device further includes: predefining multiple cyclic prefix lengths and / or cyclic prefix contents; determining the cyclic prefix length and / or cyclic prefix content used in this transmission based on the predefined multiple cyclic prefix lengths and / or cyclic prefix contents.

[0072] In the embodiments of the present disclosure, multiple lengths and / or contents can be predefined, and the CP length and / or content used in this transmission can be determined through pre-configuration. For example, define the relationship between the CP length and the subcarrier spacing, and determine the CP length and / or content used in this transmission by pre-configuring the subcarrier spacing.

[0073] In some embodiments, pre-configuration can also be performed at the higher layer or the physical layer. As an example, pre-configuration can be performed at the media access control (MAC) layer. For example, the CP length can be implicitly configured by pre-configuring the subcarrier spacing; or, pre-configuration can be performed at the new higher layer. For example, the CP length can be implicitly configured by pre-configuring the subcarrier spacing; or, pre-configuration can be performed at the physical layer. For example, the CP length can be implicitly configured by the configuration of the acquisition signal in the preamble.

[0074] Before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol, the length and / or content of the cyclic prefix used for this transmission can also be determined based on pre-configuration at the higher layer or physical layer, where the higher layer includes the media access control layer and / or a newly defined new layer. The physical layer is also known as the L1 layer. Correspondingly, the physical layer control information can also be referred to as L1 layer control information; the higher layer can include the L2 layer and / or the L3 layer. Correspondingly, the higher layer control information can be L2 layer control information and / or L3 layer control information.

[0075] It should be noted that the higher layer can also be a newly defined new layer, and the new layer can be a layer other than the physical layer defined according to actual needs. Correspondingly, the higher layer control information can also be the control information configured or indicated by this higher layer.

[0076] In some embodiments, CP enabling, configuration or indication of the CP length and / or CP content can be performed at the higher layer (MAC layer or newly defined new layer), for example, configuring or indicating CP enabling, CP length or CP content (rules).

[0077] Before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol, the length and / or content of the cyclic prefix used for this transmission can also be determined based on the configuration of the higher layer, where the higher layer includes the media access control layer and / or a newly defined new layer.

[0078] In some embodiments, the configuration or indication method may be direct configuration or indication, such as directly configuring or indicating the CP length. As an example, determining the length and / or content of the cyclic prefix used for this transmission based on the configuration of the higher layer can be obtaining the length and / or content of the cyclic prefix used for this transmission from the configuration of the higher layer.

[0079] In some embodiments, the configuration or indication method can also be implicit configuration or indication, such as configuring the CP length by configuring or indicating the subcarrier spacing. As an example, determining the length and / or content of the cyclic prefix used for this transmission based on the configuration of the higher layer can be obtaining the first information related to the cyclic prefix based on the configuration of the higher layer; and determining the length and / or content of the cyclic prefix used for this transmission based on the first information.

[0080] Similar to the above high-layer configuration, in some embodiments, the cyclic prefix length and / or cyclic prefix content used for this transmission can also be determined based on a physical layer indication. For example, the CP length can be directly indicated. As an example, the cyclic prefix length and / or cyclic prefix content used for this transmission can be obtained from the physical layer indication. In some embodiments, to determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on a physical layer indication, the first information related to the cyclic prefix can also be obtained from the physical layer indication; based on the first information, the cyclic prefix length and / or cyclic prefix content used for this transmission can be determined.

[0081] In some embodiments, the CP length and / or CP content are also configured or indicated at the physical layer. Before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol, the cyclic prefix length and / or cyclic prefix content used for this transmission can be determined based on a physical layer indication.

[0082] In some embodiments, before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol, the cyclic prefix length and / or cyclic prefix content used for this transmission can also be determined based on a high-layer configuration and a physical layer indication. The configuration or indication of the CP length and / or CP content can be performed through a high-layer configuration or indication and through a physical layer configuration or indication.

[0083] In some embodiments, the high layer provides enabling information, and the physical layer provides specific configuration or indication information. The above determination of the cyclic prefix length and / or cyclic prefix content used for this transmission based on a high-layer configuration and a physical layer indication can be to perform an enabling configuration of the cyclic prefix based on the high-layer configuration; based on the physical layer indication, determine the cyclic prefix length and / or cyclic prefix content used for this transmission.

[0084] In some embodiments, the MAC layer or a new layer performs an enabling configuration of configurable CP or variable CP, and the physical layer indicates the length and / or rules of the specific configurable CP or variable CP. The above determination of the cyclic prefix length and / or cyclic prefix content used for this transmission based on a high-layer configuration and a physical layer indication can be to perform an enabling configuration of a configurable cyclic prefix or variable cyclic prefix based on an indication of the media access control layer or an indication of a newly defined new layer; obtain the cyclic prefix length and / or cyclic prefix content used for this transmission from the physical layer indication.

[0085] In some embodiments, the MAC layer or a new layer performs an enabling configuration of configurable CP or variable CP, and the physical layer indicates the length and / or rules of the specific configurable CP or variable CP, which can include one or more of the following schemes: indicating the length and / or rules of the configurable CP or variable CP through a preamble;

[0086] Indicate the length and / or rule of configurable CP or variable CP through R2D control information;

[0087] Indicate the length and / or rule of configurable CP or variable CP through PRDCCH;

[0088] Indicate the length and / or rule of configurable CP or variable CP through PRDCH.

[0089] In some embodiments, the MAC layer or a new layer performs the enabling configuration of inserting CP or not inserting CP, and the physical layer indicates the specific length and / or rule of inserting CP or not inserting CP. Based on the above high-layer configuration and physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used in this transmission can be based on the indication of the media access control layer or the indication of a newly defined new layer to perform the enabling configuration of inserting or not inserting a cyclic prefix; if it is determined to insert a cyclic prefix, obtain the cyclic prefix length and / or cyclic prefix content used in this transmission from the physical layer indication.

[0090] In some embodiments, the MAC layer or a new layer performs the enabling configuration of inserting CP or not inserting CP, and the physical layer indicates the specific length and / or rule of inserting CP or not inserting CP, which may include one or more of the following schemes:

[0091] Indicate the length and / or rule of inserting CP or not inserting CP through a preamble;

[0092] Indicate the length and / or rule of inserting CP or not inserting CP through R2D control information;

[0093] Indicate the length and / or rule of configurable CP or variable CP through PRDCCH;

[0094] Indicate the length and / or rule of inserting CP or not inserting CP through PRDCH.

[0095] In some embodiments, the high layer provides multiple CP configuration information, and the physical layer provides specific configuration scheme indications. Based on the above high-layer configuration and physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used in this transmission can be to obtain multiple cyclic prefix configurations from the high-layer configuration; based on the physical layer indication, determine the cyclic prefix length and / or cyclic prefix content used in this transmission among multiple cyclic prefix configurations.

[0096] In some embodiments, the upper layer provides multiple CP configuration information, and the physical layer provides an indication of a specific configuration scheme. It can be the MAC layer or a new layer that configures the configuration schemes of multiple potential CPs, and the physical layer indicates the CP configuration scheme selected for this transmission, including at least one of a configuration index, CP configuration parameters, etc. The above configuration schemes include one or more of the following schemes:

[0097] Indicate the CP configuration scheme selected for this transmission through the Preamble;

[0098] Indicate the CP configuration scheme selected for this transmission through the R2D control information;

[0099] Indicate the length and / or rule of the configurable CP or variable CP through the PRDCCH;

[0100] Indicate the CP configuration scheme selected for this transmission through the PRDCH.

[0101] In some embodiments, based on predefined, preconfigured, upper layer configuration, and / or physical layer indication, determine the cyclic prefix length and / or cyclic prefix content used for this transmission, which may include:

[0102] Determine the cyclic prefix and / or cyclic prefix content used for this transmission based on predefined or preconfigured information and / or the indication information of the preamble;

[0103] Determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the preamble;

[0104] Or, determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the R2D control information and / or the indication information of the preamble;

[0105] Or, determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information on the physical layer control channel (PRDCCH) from the network side device to the IoT device and / or the indication information of the preamble.

[0106] Or, determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information on the PRDCH and / or the indication information of the preamble.

[0107] In the above embodiments, determining the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the preamble may be configuring the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the preamble and / or the clock acquisition signal within the preamble.

[0108] The above-mentioned preamble-based indication information and / or clock acquisition signal within the preamble configure or indicate the cyclic prefix length and / or cyclic prefix content used for this transmission, which may include:

[0109] Obtain a first threshold from the clock acquisition signal within the preamble;

[0110] Obtain the chip length of on-off keying (OOK) and / or the cyclic prefix length of OOK within the signal of this transmission;

[0111] Based on the chip length of OOK and / or the cyclic prefix length of OOK, and the first threshold, determine the cyclic prefix length used for this transmission.

[0112] In some embodiments, the clock acquisition signal within the preamble obtains the cyclic prefix (CP) length information of the R2D transmission through the chip length of on-off keying (OOK) or the cyclic prefix (CP) length information of OOK within the clock acquisition signal. Specifically, the following solutions may be included:

[0113] The clock acquisition signal provides the OOK chip length information (excluding CP) and is regarded as the first threshold. If the OOK chip length in the received R2D transmission exceeds the first threshold, the exceeded length is regarded as the CP length;

[0114] The clock acquisition signal provides the OOK chip length information (excluding CP) and is regarded as the first threshold. If the OOK chip length in the received R2D transmission is much lower than the first threshold, the OOK chip length in this R2D transmission is regarded as the CP length, and this OOK chip is regarded as CP;

[0115] The clock acquisition signal provides the OOK chip length information (excluding CP) and is regarded as the first threshold. If the OOK chip length in the received R2D transmission is approximately the same as the first threshold, it is considered that no CP is inserted in this OOK chip in this R2D transmission;

[0116] The clock acquisition signal provides the OOK chip length information (excluding CP) and the CP length information, and the OOK chip length without the CP length is considered as the first threshold. If the OOK chip length in the received R2D transmission exceeds the first threshold, and the length of the OOK chip in the R2D transmission is approximately the same as the sum of the OOK chip length information (excluding CP) and the CP length information provided by the clock acquisition signal, then the CP length of the OOK chip in this R2D transmission is considered as the indicated CP length;

[0117] The clock acquisition signal provides the OOK chip length information (excluding CP) and the CP length information, and the OOK chip length without the CP length is considered as the first threshold. If the OOK chip length in the received R2D transmission does not exceed the first threshold, and the length of the OOK chip in the R2D transmission is approximately the same as the CP length quantity provided by the clock acquisition signal, then the OOK chip length of this R2D transmission is considered as the CP length, and the OOK chip of this R2D transmission is CP;

[0118] The clock acquisition signal provides the OOK chip length information (excluding CP) and the CP length information, and the OOK chip length without the CP length is considered as the first threshold. If the OOK chip length in the received R2D transmission is approximately the same as the first threshold quantity, then it is considered that no CP is inserted in the OOK chip of this R2D transmission;

[0119] The clock acquisition signal provides the OOK chip length information (excluding CP) and the OOK chip length information (including CP), and the OOK chip length without the CP length is considered as the first threshold. If the OOK chip length in the received R2D transmission exceeds the first threshold, and the length of the OOK chip in the R2D transmission is approximately the same as the OOK chip length information (including CP) provided by the clock acquisition signal, then the CP length of the OOK chip in this R2D transmission is considered as the difference between the OOK chip length information (excluding CP) and the OOK chip length information (including CP);

[0120] The clock acquisition signal provides the OOK chip length information (excluding CP) and the OOK chip length information (including CP), and the OOK chip length without the CP length is regarded as the first threshold. If the OOK chip length in the received R2D transmission is less than the first threshold, and the difference between the length of the OOK chip in the R2D transmission and the OOK chip length information (including CP) and the OOK chip length information (excluding CP) provided by the clock acquisition signal is approximately the same, then the CP length of the OOK in this R2D transmission is considered to be the difference between the OOK chip length information (excluding CP) and the OOK chip length information (including CP), and the OOK chip length of this R2D transmission is considered to be the CP length;

[0121] The clock acquisition signal provides the OOK chip length information (excluding CP) and the OOK chip length information (including CP), and the OOK chip length without the CP length is regarded as the first threshold. If the OOK chip length in the received R2D transmission is approximately the same as the first threshold, and the difference between the length of the OOK chip in the R2D transmission and the OOK chip length information (including CP) and the OOK chip length information (excluding CP) provided by the clock acquisition signal is approximately the same, then it is considered that no CP is inserted into the OOK chip in this R2D transmission.

[0122] In the above embodiments, based on the indication information of the preamble, the cyclic prefix length and / or the cyclic prefix content used in this transmission can be obtained from the indication information of the preamble and / or from the clock acquisition signal in the preamble.

[0123] The indication information in the preamble (Preamble) is used to obtain the OOK chip length, CP length or CP content (CP rule) through the indication information. Specifically, the following solutions can be included:

[0124] The indication information in the preamble indicates the CP length, and the clock acquisition signal provides the OOK chip length information (excluding CP);

[0125] The indication information in the preamble indicates the CP length and the OOK chip length information (excluding CP);

[0126] The indication information within the preamble indicates the CP length, the CP content (CP rule), and the clock acquisition signal provides the OOK chip length information (excluding the CP).

[0127] The indication information within the preamble indicates the CP length, the CP content (CP rule), and the OOK chip length information (excluding the CP).

[0128] The indication information within the preamble indicates the OOK chip length information (including the CP), and the clock acquisition signal provides the OOK chip length information (excluding the CP).

[0129] The indication information within the preamble indicates the OOK chip length information (including the CP) and the OOK chip length information (excluding the CP).

[0130] The indication information within the preamble indicates the OOK chip length information (including the CP), the CP content (CP rule), and the clock acquisition signal provides the OOK chip length information (excluding the CP).

[0131] The indication information within the preamble indicates the OOK chip length information (including the CP), the CP content (CP rule), and the OOK chip length information (excluding the CP).

[0132] The indication information within the preamble indicates the CP content (CP rule), and the clock acquisition signal provides the OOK chip length information (excluding the CP).

[0133] The indication information within the preamble indicates the CP content (CP rule) and the OOK chip length information (excluding the CP).

[0134] In the above embodiments, based on the indication information of the R2D control information and / or the indication information of the preamble, determining the cyclic prefix length and / or the cyclic prefix content used in this transmission may be based on the indication information of the R2D control information and / or the clock acquisition signal within the preamble to determine the cyclic prefix length and / or the cyclic prefix content used in this transmission.

[0135] Through the indication information of the R2D control information and / or the indication information of the preamble, configure or indicate the CP length and / or the CP content. Specifically, the following solutions may be included:

[0136] The indication information of the R2D control information indicates the CP length, and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0137] The indication information of the R2D control information indicates the CP length, and the OOK chip length information (excluding the CP);

[0138] The indication information of the R2D control information indicates the CP length, the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0139] The indication information of the R2D control information indicates the CP length, the CP content (CP rule), and the OOK chip length information (excluding the CP);

[0140] The indication information of the R2D control information indicates the OOK chip length information (including the CP), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0141] The indication information of the R2D control information indicates the OOK chip length information (including the CP), and the OOK chip length information (excluding the CP);

[0142] The indication information of the R2D control information indicates the OOK chip length information (including the CP), the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0143] The indication information of the R2D control information indicates the OOK chip length information (including the CP), the CP content (CP rule), and the OOK chip length information (excluding the CP);

[0144] The indication information of the R2D control information indicates the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0145] The indication information of the R2D control information indicates the CP content (CP rule), and the OOK chip length information (excluding the CP).

[0146] In the above embodiments, based on the indication information on the physical layer control channel (PRDCCH) from the network side device to the Internet of Things device and / or the preamble indication information, the cyclic prefix length and / or the cyclic prefix content used for this transmission are configured. It can be determined based on the indication information on the physical layer control channel (PRDCCH) from the network side device to the Internet of Things device and / or the clock acquisition signal in the preamble for the cyclic prefix length and / or the cyclic prefix content used for this transmission.

[0147] Through the indication information in the PRDCCH, the configuration or indication of the CP length and / or the CP content is performed. Specifically, the following solutions may be included:

[0148] The indication information in the PRDCCH indicates the CP length, and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0149] The indication information in the PRDCCH indicates the CP length, and the OOK chip length information (excluding the CP);

[0150] The indication information in the PRDCCH indicates the CP length, the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0151] The indication information in the PRDCCH indicates the CP length, the CP content (CP rule), and the OOK chip length information (excluding the CP);

[0152] The indication information in the PRDCCH indicates the OOK chip length information (including the CP), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0153] The indication information in the PRDCCH indicates the OOK chip length information (including the CP), and the OOK chip length information (excluding the CP);

[0154] The indication information in the PRDCCH indicates the OOK chip length information (including the CP), the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding the CP);

[0155] The indication information in the PRDCCH indicates the OOK chip length information (including the CP), the CP content (CP rule), and the OOK chip length information (excluding the CP);

[0156] The indication information in the PRDCCH indicates the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding CP);

[0157] The indication information in the PRDCCH indicates the CP content (CP rule) and the OOK chip length information (excluding CP).

[0158] In the above embodiments, based on the indication information on the PRDCH and / or the preamble indication information, the cyclic prefix length and / or the cyclic prefix content used for this transmission are determined. It can be based on the indication information on the PRDCH and / or the clock acquisition signal in the preamble to determine the cyclic prefix length and / or the cyclic prefix content used for this transmission.

[0159] Through the indication information on the PRDCH and / or the preamble indication information, the configuration or indication of the CP length and / or the CP content is performed. Specifically, the following schemes can be included:

[0160] The indication information on the PRDCH indicates the CP length, and the clock acquisition signal (acquisition signal) in the preamble provides the OOK chip length information (excluding CP);

[0161] The indication information on the PRDCH indicates the CP length and the OOK chip length information (excluding CP);

[0162] The indication information on the PRDCH indicates the CP length, the CP content (CP rule), and the clock acquisition signal (acquisition signal) in the preamble provides the OOK chip length information (excluding CP);

[0163] The indication information on the PRDCH indicates the CP length, the CP content (CP rule), and the OOK chip length information (excluding CP);

[0164] The indication information on the PRDCH indicates the OOK chip length information (including CP), and the clock acquisition signal (acquisition signal) in the preamble provides the OOK chip length information (excluding CP);

[0165] The indication information on the PRDCH indicates the OOK chip length information (including CP) and the OOK chip length information (excluding CP);

[0166] The indication information on the PRDCH indicates the OOK chip length information (including CP), the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding CP);

[0167] The indication information on the PRDCH indicates the OOK chip length information (including CP), the CP content (CP rule), and the OOK chip length information (excluding CP);

[0168] The indication information on the PRDCH indicates the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding CP);

[0169] The indication information on the PRDCH indicates the CP content (CP rule) and the OOK chip length information (excluding CP).

[0170] In the above embodiments, based on the predefined or preconfigured information and / or the preamble indication information, the cyclic prefix length and / or the cyclic prefix content used in this transmission are determined. It can be based on the predefined or preconfigured indication information and / or the clock acquisition signal in the preamble to determine the cyclic prefix length and / or the cyclic prefix content used in this transmission.

[0171] Through the predefined or preconfigured indication information and / or the preamble indication information, the configuration or indication of the CP length and / or the CP content is performed. Specifically, the following schemes can be included:

[0172] The predefined or preconfigured indication information indicates the CP length, and the clock acquisition signal in the preamble (acquisition signal) provides the OOK chip length information (excluding CP);

[0173] The predefined or preconfigured indication information indicates the CP length and the OOK chip length information (excluding CP);

[0174] The predefined or preconfigured indication information indicates the CP length, the CP content (CP rule), and the clock acquisition signal in the preamble (acquisition signal) provides the OOK chip length information (excluding CP);

[0175] The predefined or preconfigured indication information indicates the CP length, the CP content (CP rule), and the OOK chip length information (excluding CP);

[0176] Predefined or preconfigured indication information indicates the OOK chip length information (including CP), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding CP);

[0177] Predefined or preconfigured indication information indicates the OOK chip length information (including CP), the OOK chip length information (excluding CP);

[0178] Predefined or preconfigured indication information indicates the OOK chip length information (including CP), the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding CP);

[0179] Predefined or preconfigured indication information indicates the OOK chip length information (including CP), the CP content (CP rule), and the OOK chip length information (excluding CP);

[0180] Predefined or preconfigured indication information indicates the CP content (CP rule), and the clock acquisition signal in the preamble provides the OOK chip length information (excluding CP);

[0181] Predefined or preconfigured indication information indicates the CP content (CP rule), and the OOK chip length information (excluding CP).

[0182] Based on the same inventive concept, an embodiment of the present disclosure also provides a data transmission method for an Internet of Things device. The data transmission method for the Internet of Things device is executed by a network-side device, as Figure 3 shown, the data transmission method for the Internet of Things device may include S301.

[0183] In S301, when the network-side device performs R2D link transmission, a cyclic prefix is inserted before each orthogonal frequency division multiplexing symbol;

[0184] Among them, the R2D link transmission includes the transmission of at least one of the physical layer transmission channel PRDCH from the network-side device to the Internet of Things device, R2D control information, the physical layer control channel from the network-side device to the Internet of Things device, preamble, postamble, intermediate sequence, reference signal, broadcast information, and paging information.

[0185] Based on the same inventive concept, an embodiment of the present disclosure also provides a data transmission method for an Internet of Things device. The data transmission method for the Internet of Things device is executed by the Internet of Things device, as Figure 4 shown, the data transmission method for the Internet of Things device may include S401.

[0186] In S401, the IoT device receives data from the network-side device through the R2D link. There is a cyclic prefix before each orthogonal frequency-division multiplexing symbol in the R2D link transmission.

[0187] Among them, the R2D link transmission includes the transmission of at least one of the physical layer transmission channel PRDCH from the network-side device to the IoT device, R2D control information, the physical layer control channel from the network-side device to the IoT device, preamble, postamble, middle sequence, reference signal, broadcast information, and paging information.

[0188] In a specific embodiment, the CP is predefined or preconfigured content.

[0189] Table 1 Supported Transmission Numerology

[0190] μ <![CDATA[Δf = 2 μ ·15[kHz]]]> Cyclic Prefix -2 3.75 A-IoT Normal, A-IoT Extended, A-IoT Zero -1 7.5 A-IoT Normal, A-IoT Extended, A-IoT Zero 0 15 A-IoT Normal, A-IoT Extended, A-IoT Zero 1 30 A-IoT Normal, A-IoT Extended, A-IoT Zero 2 60 A-IoT Normal, A-IoT Extended, A-IoT Zero 3 120 A-IoT Normal, A-IoT Extended, A-IoT Zero 4 240 A-IoT Normal, A-IoT Extended, A-IoT Zero 5 480 A-IoT Normal, A-IoT Extended, A-IoT Zero 6 960 A-IoT Normal, A-IoT Extended, A-IoT Zero

[0191]

[0192] As shown in Table 1 and the formula above, in the 38.211 protocol, the correspondence between the CP length and subcarrier spacing of A-IoT is re-predefined. Two more rows are added to the correspondence between the CP length and subcarrier spacing. Each CP can be not only normal but also extended to ensure that each CP length is the same. In addition, zero can also be used to indicate no CP added. 144 and 512 are only for reference, and the number of CP points can be adjusted continuously in actual applications.

[0193] In another specific embodiment, the CP enables the CP at the MAC layer or a new higher layer. The configuration or indication of the CP length and / or CP content (rule) is in a direct configuration manner. In the configuration parameter FrequencyInfoR2D of R2D, in addition to the traditional subcarrier spacing configuration, a new CP configuration is added, that is, the CP is directly configured in this parameter.

[0194] In an embodiment of the present disclosure, a data transmission method for an Internet of Things (IoT) device is further provided. The data transmission method for the IoT device can be executed by the IoT device. The data transmission method for the IoT device may include inserting a cyclic prefix before each orthogonal frequency division multiplexing (OFDM) symbol when the IoT device performs D2R link transmission. Among them, D2R link transmission includes the transmission of at least one of the physical layer data radio channel (PDRCH) from the IoT device to the network side device, D2R control information, the physical layer control channel from the IoT device to the network side device, preamble, postamble, middle sequence, reference signal, broadcast information, and paging information. It can be understood that the specific implementation process of the data transmission method for the IoT device is similar to that of the foregoing embodiment and will not be elaborated herein.

[0195] The inventors found that in downlink transmission, the configurations of the existing NR system can be reused. Therefore, the downlink transmission format should be aligned with the NR air interface as much as possible. The NR system adds a CP during transmission to reduce inter-symbol interference caused by multipath effects. Therefore, this feature may also need to be added to the downlink transmission of A-IoT, including the length of the CP added, the rules for addition, and the indication method. In the NR system, the length of the CP is predefined and divided into normal length and extended length. Since its synchronization mechanism is good, the user equipment (UE) at the receiving end can count the number of points of the CP and remove it accordingly. In this way, the added CP has little impact on the receiving performance. However, in the A-IoT system, the synchronization performance is not good, and the method of counting points to remove the CP is prone to errors. Moreover, for longer and shorter CPs, it is difficult for IoT devices to identify them. Therefore, either the method of counting points is adopted, but the length of the CP is modified to minimize the difference between CPs, or no CP is added, or the IoT device side adopts the method of counting rising edges or falling edges for reception. In this case, as long as it is ensured that the introduction of the CP does not generate additional rising edges or falling edges so that the CP can be not removed, or the rising edges or falling edges caused by the CP can be easily identified and removed, the introduction of the CP will not cause performance degradation. When designing the corresponding CP transmission mechanism, considering that in some scenarios, the length and rules of the CP may not be fixed and may be adjusted according to the application scenario, the solution of the embodiment of the present disclosure is designed.

[0196] In the embodiments of the present disclosure, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0197] The term "and / or" in the present disclosure is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0198] In addition, although the various steps of the methods in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that these steps must be performed in that specific order, or that all of the steps shown must be performed to achieve the desired result.

[0199] In some embodiments, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc.

[0200] Based on the same inventive concept, an embodiment of the present disclosure also provides a network-side device, as Figure 5 shown, the network-side device includes a prefix insertion module 501.

[0201] The prefix insertion module 501 is configured to insert a cyclic prefix before each orthogonal frequency division multiplexing symbol during the transmission of the R2D link from the network-side device to the Internet of Things device;

[0202] wherein, the R2D link transmission includes the transmission of at least one of a transmission channel from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

[0203] In some embodiments, the configuration method of the cyclic prefix includes at least one of the following configuration methods: predefined, preconfigured, high-layer configured, and physical layer indication.

[0204] In some embodiments, the network-side device further includes a prefix determination module. The prefix determination module is configured to determine the length and / or content of the cyclic prefix used for this transmission based on predefined, preconfigured, high-layer configured, and / or physical layer indication before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol.

[0205] In some embodiments, the prefix determination module is configured to predefine multiple cyclic prefix lengths and / or cyclic prefix contents; and determine the length and / or content of the cyclic prefix used for this transmission based on the predefined multiple cyclic prefix lengths and / or cyclic prefix contents.

[0206] In some embodiments, the prefix determination module is configured to determine the length and / or content of the cyclic prefix used for this transmission based on the preconfiguration of the high layer or the physical layer, where the high layer includes a media access control layer and / or a newly defined layer.

[0207] In some embodiments, the prefix determination module is configured to obtain the length and / or content of the cyclic prefix used for this transmission from the configuration of the high layer.

[0208] In some embodiments, a prefix determination module is configured to obtain first information related to a cyclic prefix from a high-layer configuration; and determine the length and / or content of the cyclic prefix used for this transmission based on the first information.

[0209] In some embodiments, a prefix determination module is configured to obtain the length and / or content of the cyclic prefix used for this transmission from a physical layer indication.

[0210] In some embodiments, a prefix determination module is configured to obtain first information related to a cyclic prefix from a physical layer indication; and determine the length and / or content of the cyclic prefix used for this transmission based on the first information.

[0211] In some embodiments, determining the length and / or content of the cyclic prefix used for this transmission based on a high-layer configuration and a physical layer indication includes: performing an enabling configuration of the cyclic prefix based on the high-layer configuration; and determining the length and / or content of the cyclic prefix used for this transmission based on the physical layer indication.

[0212] In some embodiments, performing an enabling configuration of the cyclic prefix based on a high-layer configuration includes: performing an enabling configuration of a configurable cyclic prefix or a variable cyclic prefix based on the high-layer configuration, where the high layer includes a media access control layer indication and / or a newly defined new layer.

[0213] In some embodiments, performing an enabling configuration of the cyclic prefix based on a high-layer configuration includes: performing an enabling configuration of inserting or not inserting a cyclic prefix based on the high-layer configuration, where the high layer includes a media access control layer indication and / or a newly defined new layer.

[0214] In some embodiments, a prefix determination module is configured to obtain multiple cyclic prefix configurations based on a high-layer configuration; and determine the length and / or content of the cyclic prefix used for this transmission from the multiple cyclic prefix configurations based on the physical layer indication.

[0215] In some embodiments, a prefix determination module is configured to determine the cyclic prefix and / or the content of the cyclic prefix used for this transmission based on predefined or preconfigured information and / or indication information of a preamble;

[0216] Determine the length and / or content of the cyclic prefix used for this transmission based on the indication information of the preamble;

[0217] Or, determine the length and / or content of the cyclic prefix used for this transmission based on the indication information of R2D control information and / or the indication information of the preamble;

[0218] Alternatively, based on the indication information and / or preamble indication information on the physical layer control channel from the network-side device to the IoT device, determine the cyclic prefix length and / or cyclic prefix content used for this transmission.

[0219] Alternatively, based on the indication information on the PRDCH and / or the indication information of the preamble, determine the cyclic prefix length and / or cyclic prefix content used for this transmission.

[0220] In some embodiments, determining the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the preamble includes: based on the indication information within the preamble and / or the clock acquisition signal within the preamble, determine the cyclic prefix length and / or cyclic prefix content used for this transmission.

[0221] In some embodiments, the indication information within the preamble carries the cyclic prefix length used for this transmission, and the clock acquisition signal within the preamble carries the chip length of on-off keying (OOK);

[0222] Alternatively, the indication information within the preamble carries the cyclic prefix length used for this transmission and the chip length of OOK;

[0223] Alternatively, the indication information within the preamble carries the cyclic prefix length and cyclic prefix content used for this transmission, and the clock acquisition signal within the preamble carries the chip length of OOK;

[0224] Alternatively, the indication information within the preamble carries the cyclic prefix length, cyclic prefix content, and chip length of OOK used for this transmission.

[0225] In some embodiments, the indication information within the preamble carries first length information, and the clock acquisition signal within the preamble carries second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of OOK;

[0226] Alternatively, the indication information within the preamble carries the first length information and the second length information;

[0227] Alternatively, the indication information within the preamble carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal within the preamble carries the second length information;

[0228] Alternatively, the indication information within the preamble carries the first length information, the second length information, and the content of the cyclic prefix;

[0229] Alternatively, the indication information within the preamble carries the content of the cyclic prefix, and the clock acquisition signal within the preamble carries the second length information;

[0230] Alternatively, the content of the cyclic prefix and the second length information are carried in the indication information within the preamble.

[0231] In some embodiments, determining the cyclic prefix length and / or the cyclic prefix content used for this transmission based on the indication information within the preamble and / or the clock acquisition signal within the preamble includes:

[0232] Obtaining a first threshold from the clock acquisition signal within the preamble;

[0233] Obtaining the chip length of the on-off keying (OOK) within the signal for this transmission and / or the cyclic prefix length of the OOK;

[0234] Determining the cyclic prefix length used for this transmission based on the chip length of the OOK and / or the cyclic prefix length of the OOK, and the first threshold.

[0235] In some embodiments, determining the cyclic prefix length and / or the cyclic prefix content used for this transmission based on the indication information of the R2D control information and / or the indication information of the preamble includes: determining the cyclic prefix length and / or the cyclic prefix content used for this transmission based on the indication information of the R2D control information and / or the clock acquisition signal within the preamble.

[0236] In some embodiments, the indication information of the R2D control information carries the cyclic prefix length used for this transmission, and the clock acquisition signal within the preamble carries the chip length of the on-off keying (OOK);

[0237] Alternatively, the indication information of the R2D control information carries the cyclic prefix length used for this transmission and the chip length of the OOK;

[0238] Alternatively, the indication information of the R2D control information carries the cyclic prefix length used for this transmission and the cyclic prefix content, and the clock acquisition signal within the preamble carries the chip length of the OOK;

[0239] Alternatively, the indication information of the R2D control information carries the cyclic prefix length, the cyclic prefix content, and the chip length of the OOK used for this transmission.

[0240] In some embodiments, the indication information of the R2D control information carries a first length information, and the clock acquisition signal within the preamble carries a second length information. The first length information is the sum of the chip length of the OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of the OOK;

[0241] Alternatively, the indication information of the R2D control information carries the first length information and the second length information;

[0242] Alternatively, the indication information of the R2D control information carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal in the preamble carries the second length information;

[0243] Alternatively, the indication information of the R2D control information carries the first length information, the second length information, and the content of the cyclic prefix;

[0244] Alternatively, the indication information of the R2D control information carries the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the second length information;

[0245] Alternatively, the indication information of the R2D control information carries the content of the cyclic prefix and the second length information.

[0246] In some embodiments, based on the indication information on the physical layer control channel from the network side device to the IoT device and / or the preamble indication information, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: based on the indication information on the physical layer control channel PRDCCH from the network side device to the IoT device and / or the clock acquisition signal in the preamble, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

[0247] In some embodiments, the indication information on the PRDCCH carries the cyclic prefix length used for this transmission, and the clock acquisition signal in the preamble carries the chip length of on-off keying (OOK);

[0248] Alternatively, the indication information on the PRDCCH carries the cyclic prefix length used for this transmission and the chip length of OOK;

[0249] Alternatively, the indication information on the PRDCCH carries the cyclic prefix length used for this transmission and the cyclic prefix content, and the clock acquisition signal in the preamble carries the chip length of OOK;

[0250] Alternatively, the indication information on the PRDCCH carries the cyclic prefix length used for this transmission, the cyclic prefix content, and the chip length of OOK.

[0251] In some embodiments, the indication information on the PRDCCH carries the first length information, and the clock acquisition signal in the preamble carries the second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of OOK;

[0252] Alternatively, the indication information on the PRDCCH carries the first length information and the second length information;

[0253] Alternatively, the indication information on the PRDCCH carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal in the preamble carries the second length information;

[0254] Alternatively, the indication information on the PRDCCH carries the first length information, the second length information, and the content of the cyclic prefix;

[0255] Alternatively, the indication information on the PRDCCH carries the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the second length information;

[0256] Alternatively, the indication information on the PRDCCH carries the content of the cyclic prefix and the second length information.

[0257] In some embodiments, based on the indication information on the PRDCH and / or the indication information of the preamble, determining the cyclic prefix length and / or the cyclic prefix content used for this transmission includes: based on the indication information on the PRDCH and / or the clock acquisition signal in the preamble, determining the cyclic prefix length and / or the cyclic prefix content used for this transmission.

[0258] In some embodiments, the indication information on the PRDCH carries the cyclic prefix length used for this transmission, and the clock acquisition signal in the preamble carries the chip length of the on-off keying (OOK);

[0259] Alternatively, the indication information on the PRDCH carries the cyclic prefix length used for this transmission and the chip length of the OOK;

[0260] Alternatively, the indication information on the PRDCH carries the cyclic prefix length and the cyclic prefix content used for this transmission, and the clock acquisition signal in the preamble carries the chip length of the OOK;

[0261] Alternatively, the indication information on the PRDCH carries the cyclic prefix length, the cyclic prefix content, and the chip length of the OOK used for this transmission.

[0262] In some embodiments, the indication information on the PRDCH carries the first length information, and the clock acquisition signal in the preamble carries the second length information. The first length information is the sum of the chip length of the OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of the OOK;

[0263] Alternatively, the indication information on the PRDCH carries the first length information and the second length information;

[0264] Alternatively, the indication information on the PRDCH carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal in the preamble carries the second length information;

[0265] Alternatively, the indication information on the PRDCH carries the first length information, the second length information, and the content of the cyclic prefix;

[0266] Alternatively, the indication information on the PRDCH carries the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the second length information;

[0267] Alternatively, the indication information on the PRDCH carries the content of the cyclic prefix and the second length information.

[0268] In some embodiments, based on predefined or preconfigured information and / or the indication information of the preamble, determining the cyclic prefix and / or the content of the cyclic prefix used for this transmission includes: based on the predefined or preconfigured indication information and / or the clock acquisition signal in the preamble, determining the length of the cyclic prefix and / or the content of the cyclic prefix used for this transmission.

[0269] In some embodiments, the predefined or preconfigured information carries the length of the cyclic prefix used for this transmission, and the clock acquisition signal in the preamble carries the chip length of on-off keying (OOK);

[0270] Alternatively, the predefined or preconfigured information carries the length of the cyclic prefix used for this transmission and the chip length of OOK;

[0271] Alternatively, the predefined or preconfigured information carries the length of the cyclic prefix used for this transmission and the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the chip length of OOK;

[0272] Alternatively, the predefined or preconfigured information carries the length of the cyclic prefix used for this transmission, the content of the cyclic prefix, and the chip length of OOK.

[0273] In some embodiments, the predefined or preconfigured information carries the first length information, and the clock acquisition signal in the preamble carries the second length information, where the first length information is the sum of the chip length of OOK and the length of the cyclic prefix used for this transmission, and the second length information is the chip length of OOK;

[0274] Alternatively, the predefined or preconfigured information carries the first length information and the second length information;

[0275] Alternatively, the predefined or preconfigured information carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal in the preamble carries the second length information;

[0276] Alternatively, the predefined or preconfigured information carries the first length information, the second length information, and the content of the cyclic prefix;

[0277] Alternatively, the content of the cyclic prefix is carried in the predefined or preconfigured information, and the clock acquisition signal in the preamble carries the second length information;

[0278] Alternatively, the content of the cyclic prefix and the second length information are carried in the predefined or preconfigured information.

[0279] Based on the same inventive concept, an Internet of Things device is also provided in the embodiments of the present disclosure. As Figure 6 shown, the Internet of Things device includes a data receiving module 601. The data receiving module 601 is configured to receive data from a network-side device through an R2D link transmission from the network-side device to the Internet of Things device. A cyclic prefix exists before each orthogonal frequency division multiplexing symbol in the R2D link transmission;

[0280] wherein, the R2D link transmission includes the transmission of at least one of a physical layer transmission channel PRDCH from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

[0281] Based on the same inventive concept, a communication system is also provided in the embodiments of the present disclosure. As Figure 7 shown, the communication system provided in the embodiments of the present disclosure includes an Internet of Things device 701 and a network-side device 702. When the network-side device 702 performs R2D link transmission, a cyclic prefix is inserted before each orthogonal frequency division multiplexing symbol; wherein, the R2D link transmission includes the transmission of at least one of a transmission channel from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

[0282] The concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules, or units, and are not used to limit the order or interdependence relationship of the functions performed by these devices, modules, or units.

[0283] It should be noted that although several modules or units of devices for action execution are mentioned in the above detailed description, such a division is not mandatory.

[0284] In fact, according to the embodiments of the present disclosure, the features and functions of the two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0285] Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0286] The following will refer to Figure 8 to describe the electronic device provided by the embodiments of the present disclosure. Figure 8 The electronic device 800 shown is merely an example and should not impose any limitations on the functions and scope of use of the embodiments of the present disclosure.

[0287] Figure 8 The schematic diagram of the architecture of an electronic device 800 provided by the embodiments of the present disclosure is shown. As Figure 8 shown, the electronic device 800 includes but is not limited to: at least one processor 810, at least one memory 820. The memory 820 is used to store instructions.

[0288] In some embodiments, the memory 820 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 8201 and / or a cache storage unit 8202, and may further include a read-only storage unit (ROM) 8203.

[0289] In some embodiments, the memory 820 may further include a program / utility 8204 having a set (at least one) of program modules 8205. Such program modules 8205 include but are not limited to: an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include the implementation of a network environment.

[0290] In some embodiments, the memory 820 may store an operating system. The operating system may be an operating system such as a Real Time eXecutive (RTX), LINUX, UNIX, WINDOWS, or OS X.

[0291] In some embodiments, data may also be stored in the memory 820. As an example, the processor 810 may read the data stored in the memory 820. This data may be stored at the same storage address as the instructions, or this data may be stored at a different storage address from the instructions.

[0292] The processor 810 is used to call the instructions stored in the memory 820 to implement the steps according to various exemplary embodiments of the present disclosure described in the "Exemplary Methods" section of this specification. For example, the processor 810 may execute the steps of the embodiments of the data transmission method of the above-mentioned Internet of Things device.

[0293] It should be noted that the above-mentioned processor 810 can be a general-purpose processor or a dedicated processor. The processor 810 can include one or more processing cores, and the processor 810 executes various functional applications and data processing by running instructions.

[0294] In some embodiments, the processor 810 can include a central processing unit (CPU) and / or a baseband processor. In some embodiments, the processor 810 can determine an instruction according to the priority identifier and / or function category information carried in each control instruction.

[0295] In the present disclosure, the processor 810 and the memory 820 can be set separately or integrated together. As an example, the processor 810 and the memory 820 can be integrated on a single board or a system on chip (SOC).

[0296] As Figure 8 shown, the electronic device 800 is presented in the form of a general computing device. The electronic device 800 may also include a bus 830.

[0297] The bus 830 can represent one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any bus structure in a variety of bus structures.

[0298] The electronic device 800 can also communicate with one or more external devices 840 (such as a keyboard, a pointing device, a Bluetooth device, etc.), and can also communicate with one or more devices that enable a user to interact with the electronic device 800, and / or communicate with any device that enables the electronic device 800 to communicate with one or more other computing devices (such as a router, a modem, etc.). Such communication can be performed through an input / output (I / O) interface 850.

[0299] Moreover, the electronic device 800 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 860.

[0300] As Figure 8 shown, the network adapter 860 communicates with other modules of the electronic device 800 through the bus 830.

[0301] It should be understood that, although not shown in the figures, other hardware and / or software modules may be used in conjunction with the electronic device 800, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0302] It can be understood that the structure illustrated in the embodiments of the present disclosure does not constitute a specific limitation on the electronic device 800. In other embodiments of the present disclosure, the electronic device 800 may include more or fewer components than Figure 8 shown, or combine certain components, or split certain components, or have different component arrangements. Figure 8 The components shown may be implemented in hardware, software, or a combination of software and hardware.

[0303] The present disclosure also provides a computer-readable storage medium, on which computer instructions are stored. When the computer instructions are executed by a processor, the data transmission method of the Internet of Things device described in the above method embodiments is implemented.

[0304] In the embodiments of the present disclosure, the computer-readable storage medium is a medium that can send, propagate, or transmit computer instructions for use by or in connection with an instruction execution system, apparatus, or device. As an example, the computer-readable storage medium is a non-volatile storage medium.

[0305] In some embodiments, more specific examples of the computer-readable storage medium in the present disclosure may include but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, USB flash drives, portable hard disks, or any suitable combination of the above.

[0306] In the embodiments of the present disclosure, the computer-readable storage medium may include a data signal propagated in a baseband or as part of a carrier wave, in which computer instructions (readable program code) are carried.

[0307] Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above.

[0308] In some examples, the computing instructions included on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination of the above.

[0309] Embodiments of the present disclosure also provide a computer program product. The computer program product stores instructions that, when executed by a computer, cause the computer to implement the data transmission method of the Internet of Things device described in the foregoing method embodiments.

[0310] The foregoing instructions may be program code. In specific implementation, the program code may be written in any combination of one or more programming languages.

[0311] Programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages.

[0312] The program code may be executed entirely on the user computing device, partially on the user device, executed as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0313] In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (for example, by connecting through an Internet service provider using the Internet).

[0314] Embodiments of the present disclosure also provide a chip, including at least one processor and an interface;

[0315] The interface is used to provide program instructions or data for at least one processor;

[0316] At least one processor is used to execute program instructions to implement the data transmission method of the Internet of Things device described in the foregoing method embodiments.

[0317] In some embodiments, the chip may further include a memory for storing program instructions and data, and the memory is located inside or outside the processor.

[0318] Those of ordinary skill in the art can understand that all or part of the steps of implementing the foregoing embodiments may be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which may be collectively referred to as "circuitry", "module", or "system" here.

[0319] Those skilled in the art will readily think of other implementation manners of the present disclosure after considering the specification and practicing the invention disclosed herein.

[0320] This disclosure is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include well-known knowledge or conventional technical means in the technical field not disclosed in the disclosure. The description and examples are only regarded as exemplary, and the true scope and spirit of the disclosure are pointed out by the appended claims.

Claims

1. A data transmission method for an Internet of Things device, characterized in that, The method is executed by a network-side device, and the method includes: When performing R2D link transmission from the network-side device to the Internet of Things device, inserting a cyclic prefix before each orthogonal frequency division multiplexing symbol; Wherein, the R2D link transmission includes the transmission of at least one of a physical layer transmission channel PRDCH from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

2. The method according to claim 1, wherein The configuration method of the cyclic prefix includes at least one of the following configuration methods: Predefined, preconfigured, high-layer configured, and physical layer indication.

3. The method according to claim 2, wherein Before inserting the cyclic prefix before each orthogonal frequency division multiplexing symbol, the method further includes: Based on predefined, preconfigured, high-layer configured, and / or physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

4. The method according to claim 3, wherein Based on predefined, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Predefining multiple cyclic prefix lengths and / or cyclic prefix contents; Based on the multiple cyclic prefix lengths and / or cyclic prefix contents predefined, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

5. The method according to claim 3, wherein Based on preconfigured, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Based on the preconfiguration of the high layer or the physical layer, determining the cyclic prefix length and / or cyclic prefix content used for this transmission, where the high layer includes a media access control layer and / or a newly defined new layer.

6. The method according to claim 3, wherein Based on high-layer configured, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Obtaining the cyclic prefix length and / or cyclic prefix content used for this transmission from the configuration of the high layer.

7. The method according to claim 3, characterized in that, Based on high-layer configured, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Obtaining first information related to the cyclic prefix from the configuration of the high layer; Based on the first information, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

8. The method according to claim 3, wherein Based on physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Obtaining the cyclic prefix length and / or cyclic prefix content used for this transmission from the physical layer indication.

9. The method according to claim 3, wherein Based on physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Obtaining first information related to the cyclic prefix from the physical layer indication; Based on the first information, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

10. The method according to claim 3, wherein Based on high-layer configured and physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used for this transmission includes: Based on high-layer configured, performing enabling configuration of the cyclic prefix; Based on physical layer indication, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

11. The method according to claim 10, characterized in that, The performing enabling configuration of the cyclic prefix based on high-layer configured includes: Based on high-layer configured, performing enabling configuration of a configurable cyclic prefix or a variable cyclic prefix, where the high layer includes media access control layer indication and / or a newly defined new layer.

12. The method according to claim 10, wherein The enabling configuration of the cyclic prefix for high-layer configuration includes: Based on the high-layer configuration, enable the configuration of inserting or not inserting a cyclic prefix. The high layer includes Media Access Control layer indication and / or a newly defined new layer.

13. The method according to claim 3, wherein Based on the high-layer configuration and the physical layer indication, determine the cyclic prefix length and / or cyclic prefix content used for this transmission, including: Based on the high-layer configuration, obtain multiple cyclic prefix configurations; Based on the physical layer indication, determine the cyclic prefix length and / or cyclic prefix content used for this transmission among the multiple cyclic prefix configurations.

14. The method according to any one of claims 3-13, characterized in that, Based on predefined, preconfigured, high-layer configuration, and / or physical layer indication, determine the cyclic prefix length and / or cyclic prefix content used for this transmission, including: Based on the predefined or preconfigured information and / or the indication information of the preamble, determine the cyclic prefix and / or cyclic prefix content used for this transmission; Or, based on the indication information of the preamble, determine the cyclic prefix length and / or cyclic prefix content used for this transmission; Or, based on the indication information of the R2D control information and / or the indication information of the preamble, determine the cyclic prefix length and / or cyclic prefix content used for this transmission; Or, based on the indication information on the physical layer control channel from the network-side device to the IoT device and / or the preamble indication information, determine the cyclic prefix length and / or cyclic prefix content used for this transmission; Or, based on the indication information on the PRDCH and / or the indication information of the preamble, determine the cyclic prefix length and / or cyclic prefix content used for this transmission.

15. The method according to claim 14, characterized in that, The determining of the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the preamble includes: Based on the indication information within the preamble and / or the clock acquisition signal within the preamble, determine the cyclic prefix length and / or cyclic prefix content used for this transmission.

16. The method according to claim 15, wherein The indication information within the preamble carries the cyclic prefix length used for this transmission, and the clock acquisition signal within the preamble carries the chip length of On-Off Keying (OOK); Or, the indication information within the preamble carries the cyclic prefix length and the chip length of OOK used for this transmission; Or, the indication information within the preamble carries the cyclic prefix length and cyclic prefix content used for this transmission, and the clock acquisition signal within the preamble carries the chip length of OOK; Or, the indication information within the preamble carries the cyclic prefix length, cyclic prefix content, and chip length of OOK used for this transmission.

17. The method according to claim 15, wherein The indication information within the preamble carries the first length information, and the clock acquisition signal within the preamble carries the second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of OOK; Or, the indication information within the preamble carries the first length information and the second length information; Or, the indication information within the preamble carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal within the preamble carries the second length information; Or, the indication information within the preamble carries the first length information, the second length information, and the content of the cyclic prefix; Alternatively, the content of the cyclic prefix is carried in the indication information within the preamble, and the second length information is carried in the clock acquisition signal within the preamble; Alternatively, the content of the cyclic prefix and the second length information are carried in the indication information within the preamble.

18. The method according to claim 15, wherein Determining the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication within the preamble and / or the clock acquisition signal within the preamble includes: Obtaining a first threshold value from the clock acquisition signal within the preamble; Obtaining the chip length of on-off keying (OOK) and / or the cyclic prefix length of OOK within the signal for this transmission; Based on the chip length of the OOK and / or the cyclic prefix length of the OOK, and the first threshold value, determining the cyclic prefix length used for this transmission.

19. The method according to claim 14, wherein Determining the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information of the R2D control information and / or the indication information of the preamble includes: Based on the indication information of the R2D control information and / or the clock acquisition signal within the preamble, determining the cyclic prefix length and / or cyclic prefix content used for this transmission.

20. The method according to claim 19, wherein The indication information of the R2D control information carries the cyclic prefix length used for this transmission, and the clock acquisition signal within the preamble carries the chip length of on-off keying (OOK); Alternatively, the indication information of the R2D control information carries the cyclic prefix length used for this transmission and the chip length of OOK; Alternatively, the indication information of the R2D control information carries the cyclic prefix length used for this transmission and the content of the cyclic prefix, and the clock acquisition signal within the preamble carries the chip length of OOK; Alternatively, the indication information of the R2D control information carries the cyclic prefix length used for this transmission, the content of the cyclic prefix, and the chip length of OOK.

21. The method according to claim 19, characterized in that, The indication information of the R2D control information carries a first length information, and the clock acquisition signal within the preamble carries a second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of OOK; Alternatively, the indication information of the R2D control information carries the first length information and the second length information; Alternatively, the indication information of the R2D control information carries the first length information and the content of the cyclic prefix used for this transmission, and the clock acquisition signal within the preamble carries the second length information; Alternatively, the indication information of the R2D control information carries the first length information, the second length information, and the content of the cyclic prefix; Alternatively, the indication information of the R2D control information carries the content of the cyclic prefix, and the clock acquisition signal within the preamble carries the second length information; Alternatively, the indication information of the R2D control information carries the content of the cyclic prefix and the second length information.

22. The method according to claim 14, wherein Determining the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information on the physical layer control channel from the network side device to the IoT device and / or the preamble indication information includes: Determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information on the physical layer control channel PRDCCH from the network side device to the Internet of Things device and / or the clock acquisition signal within the preamble.

23. The method according to claim 22, wherein The indication information on the PRDCCH carries the cyclic prefix length used for this transmission, and the clock acquisition signal within the preamble carries the chip length of on-off keying (OOK). Or, the indication information on the PRDCCH carries the cyclic prefix length and the chip length of OOK used for this transmission. Or, the indication information on the PRDCCH carries the cyclic prefix length and cyclic prefix content used for this transmission, and the clock acquisition signal within the preamble carries the chip length of OOK. Or, the indication information on the PRDCCH carries the cyclic prefix length, cyclic prefix content, and chip length of OOK used for this transmission.

24. The method according to claim 22, wherein The indication information on the PRDCCH carries first length information, and the clock acquisition signal within the preamble carries second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used for this transmission, and the second length information is the chip length of OOK. Or, the indication information on the PRDCCH carries the first length information and the second length information. Or, the indication information on the PRDCCH carries the first length information and the cyclic prefix content used for this transmission, and the clock acquisition signal within the preamble carries the second length information. Or, the indication information on the PRDCCH carries the first length information, the second length information, and the cyclic prefix content. Or, the indication information on the PRDCCH carries the cyclic prefix content, and the clock acquisition signal within the preamble carries the second length information. Or, the indication information on the PRDCCH carries the cyclic prefix content and the second length information.

25. The method according to claim 14, characterized in that, The determining of the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information on the PRDCH and / or the indication information of the preamble includes: Determine the cyclic prefix length and / or cyclic prefix content used for this transmission based on the indication information on the PRDCH and / or the clock acquisition signal within the preamble.

26. The method according to claim 25, wherein The indication information on the PRDCH carries the cyclic prefix length used for this transmission, and the clock acquisition signal within the preamble carries the chip length of on-off keying (OOK). Or, the indication information on the PRDCH carries the cyclic prefix length and the chip length of OOK used for this transmission. Or, the indication information on the PRDCH carries the cyclic prefix length and cyclic prefix content used for this transmission, and the clock acquisition signal within the preamble carries the chip length of OOK. Or, the indication information on the PRDCH carries the cyclic prefix length, cyclic prefix content, and chip length of OOK used for this transmission.

27. The method according to claim 25, characterized in that, The indication information on the PRDCH carries the first length information, and the clock acquisition signal in the preamble carries the second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used in this transmission, and the second length information is the chip length of OOK. Alternatively, the indication information on the PRDCH carries the first length information and the second length information. Alternatively, the indication information on the PRDCH carries the first length information and the content of the cyclic prefix used in this transmission, and the clock acquisition signal in the preamble carries the second length information. Alternatively, the indication information on the PRDCH carries the first length information, the second length information, and the content of the cyclic prefix. Alternatively, the indication information on the PRDCH carries the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the second length information. Alternatively, the indication information on the PRDCH carries the content of the cyclic prefix and the second length information.

28. The method according to claim 14, wherein Determining the cyclic prefix and / or cyclic prefix content used in this transmission based on the predefined or preconfigured information and / or the indication information of the preamble includes: Determining the cyclic prefix length and / or cyclic prefix content used in this transmission based on the predefined or preconfigured indication information and / or the clock acquisition signal in the preamble.

29. The method according to claim 28, wherein The predefined or preconfigured information carries the cyclic prefix length used in this transmission, and the clock acquisition signal in the preamble carries the chip length of on-off keying (OOK). Alternatively, the predefined or preconfigured information carries the cyclic prefix length used in this transmission and the chip length of OOK. Alternatively, the predefined or preconfigured information carries the cyclic prefix length used in this transmission and the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the chip length of OOK. Alternatively, the predefined or preconfigured information carries the cyclic prefix length used in this transmission, the content of the cyclic prefix, and the chip length of OOK.

30. The method according to claim 29, wherein The predefined or preconfigured information carries the first length information, and the clock acquisition signal in the preamble carries the second length information. The first length information is the sum of the chip length of OOK and the cyclic prefix length used in this transmission, and the second length information is the chip length of OOK. Alternatively, the predefined or preconfigured information carries the first length information and the second length information. Alternatively, the predefined or preconfigured information carries the first length information and the content of the cyclic prefix used in this transmission, and the clock acquisition signal in the preamble carries the second length information. Alternatively, the predefined or preconfigured information carries the first length information, the second length information, and the content of the cyclic prefix. Alternatively, the predefined or preconfigured information carries the content of the cyclic prefix, and the clock acquisition signal in the preamble carries the second length information. Alternatively, the predefined or preconfigured information carries the content of the cyclic prefix and the second length information.

31. A data transmission method for an Internet of Things device, characterized in that, The method is executed by an Internet of Things device, and the method includes: Receive data from a network-side device through an R2D link transmission from the network-side device to an Internet of Things device, where a cyclic prefix is added before each orthogonal frequency division multiplexing symbol in the R2D link transmission; Among them, the R2D link transmission includes the transmission of at least one of a physical layer transmission channel PRDCH from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

32. A network-side device, characterized in that, Comprising: A prefix insertion module, configured to insert a cyclic prefix before each orthogonal frequency division multiplexing symbol during the R2D link transmission from the network-side device to the Internet of Things device; Among them, the R2D link transmission includes the transmission of at least one of a transmission channel from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

33. An Internet of Things device, characterized in that, Comprising: A data reception module, configured to receive data from a network-side device through an R2D link transmission from the network-side device to an Internet of Things device, where a cyclic prefix is added before each orthogonal frequency division multiplexing symbol in the R2D link transmission; Among them, the R2D link transmission includes the transmission of at least one of a physical layer transmission channel PRDCH from the network-side device to the Internet of Things device, R2D control information, a physical layer control channel from the network-side device to the Internet of Things device, a preamble, a postamble, an intermediate sequence, a reference signal, broadcast information, and paging information.

34. A communication system, characterized in that, Comprising the network-side device according to claim 32 and the Internet of Things device according to claim 33.

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