Communication methods and communication apparatuses

Abstract

Provided in the embodiments of the present application are communication methods and communication apparatuses, which can send first carriers on the basis of configurations of the first carriers. A method comprises: on the basis of a configuration of a first carrier, a first node sending the first carrier to an ambient Internet-of-Things (AIoT) device, wherein the configuration of the first carrier comprises one or more of the following: a power configuration of the first carrier, a carrier spacing configuration of the first carrier, a guard band configuration of an AIoT system, a frequency hopping configuration of the first carrier, a codebook configuration of the first carrier, or a waveform configuration of the first carrier, and the first carrier is used for carrying modulation information of the AIoT device in the AIoT system.

Description

Communication method and communication apparatus TECHNICAL FIELD

[0001] The present application relates to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0002] In recent years, the Internet of Things (IoT) has attracted much attention in the field of wireless communication. With the continuous development of communication systems, IoT devices are applied to various application scenarios, including home, industry, agriculture, medical care, and various fields. Ambient IoT (AIoT) technology is widely discussed. AIoT devices mainly use external environments (for example, light, radio waves, motion, heat energy, etc.) to obtain energy, so as not to need a battery device or only have a low power storage capability (for example, a capacitor), without the need for manual battery replacement or charging.

[0003] The 3rd Generation Partnership Project (3GPP) Release R19 proposes the AIoT topic. However, there are many unresolved problems in the AIoT system.

[0004] SUMMARY

[0005] Embodiments of the present application provide a communication method and a communication apparatus, which can transmit a first carrier based on a configuration of the first carrier.

[0006] To achieve the above object, the technical solutions adopted by the present application are as follows:

[0007] In a first aspect, a communication method is provided. The method can be executed by a first node, or by a component of the first node, such as a processor, a chip, or a chip system of the first node, or by a logic module or software capable of realizing all or part of the functions of the first node. Taking the method executed by the first node as an example, the method comprises: based on a configuration of a first carrier, transmitting, by a first node, the first carrier to an ambient Internet of Things (AIoT) device, the configuration of the first carrier comprising one or more of the following: a power configuration of the first carrier, a carrier spacing configuration of the first carrier, a guard band configuration of an AIoT system, a frequency hopping configuration of the first carrier, a codebook configuration of the first carrier, or a waveform configuration of the first carrier; wherein the first carrier is used to carry modulation information of the AIoT device in the AIoT system.

[0008] In a second aspect, a communication method is provided. The method can be performed by an AIoT device, or by a component of the AIoT device, such as a processor, a chip, or a chip system of the AIoT device, or by a logic module or software that can implement all or part of the function of the AIoT device. In the case where the method is performed by the AIoT device, the method includes: receiving, by the AIoT device, a first carrier from a first node, the first carrier being transmitted by the first node based on a configuration of the first carrier, the configuration of the first carrier including one or more of: a power configuration of the first carrier, a carrier spacing configuration of the first carrier, a guard band configuration of an AIoT system, a frequency hopping configuration of the first carrier, a codebook configuration of the first carrier, or a waveform configuration of the first carrier; and determining, by the AIoT device, a backscattering signal of the first carrier based on the first carrier, wherein the first carrier is used to carry modulation information of the AIoT device in the AIoT system.

[0009] In a third aspect, a communication apparatus is provided for implementing the methods described above. The communication apparatus can be the first node in the first aspect, or an apparatus included in the first node, such as a chip; or the communication apparatus can be the AIoT device in the second aspect, or an apparatus included in the AIoT device, such as a chip.

[0010] The communication apparatus includes modules, units, or means for implementing the corresponding functions of the methods described above, which can be implemented by hardware, by software, or by a combination of hardware and software. The hardware or software includes one or more modules or units corresponding to the functions described above.

[0011] In some possible designs, the communication apparatus can include a processing module and a communication module. The communication module can include an output module (or a transmitting module) and an input module (or a receiving module) to implement the functions of the output module (or the transmitting module) and the input module (or the receiving module) in any of the aspects and any possible design thereof. The processing module can be configured to implement the processing functions in any of the aspects and any possible design thereof.

[0012] Optionally, the communication apparatus further includes a storage module configured to store program instructions and data.

[0013] In a fourth aspect, a communication apparatus is provided. The communication apparatus includes at least one processor configured to execute computer programs or instructions, or to pass through a logic circuit, so that the communication apparatus performs the method of any of the aspects described above. The communication apparatus can be the first node in the first aspect, or an apparatus included in the first node, such as a chip; or the communication apparatus can be the AIoT device in the second aspect, or an apparatus included in the AIoT device, such as a chip.

[0014] In some possible design, the communication apparatus further includes a memory for storing computer instructions and / or configuration files of the logic circuit. Optionally, the memory is integrated with the processor, or the memory is independent of the processor.

[0015] In some possible design, the communication apparatus further includes a communication interface for inputting and / or outputting signals.

[0016] In some possible design, the communication interface is an interface circuit for reading and writing computer instructions, for example, the interface circuit is configured to receive computer execution instructions (the computer execution instructions are stored in the memory, which can be read directly from the memory or can be read through other devices) and transmit the computer execution instructions to the processor.

[0017] In some possible design, the communication interface is configured to communicate with modules outside the communication apparatus.

[0018] In some possible design, the communication apparatus can be a chip system. When the communication apparatus is a chip system, the chip system can include a chip, or the chip system can include a chip and other discrete devices.

[0019] In a fifth aspect, a communication apparatus is provided, including: a logic circuit and an interface circuit; the interface circuit is configured to input information and / or output information; the logic circuit is configured to perform the method in any one of the preceding aspects, and process the input information and / or generate the output information. The communication apparatus can be the first node in the first aspect, or an apparatus included in the first node, such as a chip; or the communication apparatus can be the AIoT device in the second aspect, or an apparatus included in the AIoT device, such as a chip.

[0020] It can be understood that, when the communication apparatus in any one of the third aspect to the fifth aspect is a chip, the sending action / functionality can be understood as outputting information, and the receiving action / functionality can be understood as inputting information.

[0021] In a sixth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program or instructions, when the computer program or instructions are executed by a processor, the method in any one of the preceding aspects is performed.

[0022] In a seventh aspect, a computer program product is provided, and when the computer program product is executed by a processor, the method in any one of the preceding aspects is performed.

[0023] In an eighth aspect, a communication apparatus is provided, and the communication apparatus includes a module / unit configured to perform the method in the first aspect or the second aspect.

[0024] In a ninth aspect, a communication system is provided, which includes the first node of the first aspect and the AIoT device of the second aspect. The first node and the AIoT device can be implemented as the communication apparatus of any one of the third aspect to the fifth aspect.

[0025] The technical effects brought by any one of the third aspect to the ninth aspect can refer to the technical effects brought by different design manners of the first aspect or the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0026] FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0027] FIG. 2 is a schematic diagram of an application scenario according to an embodiment of the present application;

[0028] FIG. 3 is a schematic diagram of a communication apparatus 300 according to an embodiment of the present application;

[0029] FIG. 4 is a schematic diagram of an example of a communication method according to an embodiment of the present application;

[0030] FIG. 5 is a schematic diagram of one of the first relationships;

[0031] FIG. 6 is a schematic diagram of another one of the first relationships;

[0032] FIG. 7 is a schematic diagram of a method for determining an interference measurement;

[0033] FIG. 8 is a flowchart for determining a relevant bandwidth;

[0034] FIG. 9 is a schematic diagram of a guard band of an AIoT system;

[0035] FIG. 10 is a schematic diagram of a bandwidth of an R2D signal;

[0036] FIGS. 11-14 are schematic diagrams of frequency hopping of a first carrier within a channel bandwidth of an AIoT system;

[0037] FIG. 15 is a schematic diagram of frequency hopping of a first carrier outside a channel bandwidth of an AIoT system;

[0038] FIG. 16 is a schematic diagram of an example of determining a transmission occasion of a first carrier based on first capability information;

[0039] FIG. 17 is a schematic diagram of another example of determining a transmission occasion of a first carrier based on first capability information;

[0040] FIG. 18 is a schematic diagram of adding a CP according to an embodiment of the present application;

[0041] FIG. 19 is a schematic diagram of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] In the description of the present application, unless otherwise specified, " / " means that the objects before and after the correlation are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the present application is only a description of the correlation of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural.

[0043] In the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following (one) or similar expressions means any combination of the items, including any combination of single (one) or multiple items. For example, at least one of a, b and (or) c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0044] In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, "first", "second" and the like are used to distinguish the same items or similar items with basically the same function and role. Those skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order, and "first", "second" and the like do not necessarily mean different.

[0045] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the word "exemplary" or "for example" is intended to present concepts in a concrete manner. The use of "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0046] It can be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments. It can be understood that in various embodiments of the present application, the size of the sequence of each process does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0047] It can be understood that in the present application, "when" and "if" both refer to making corresponding processing under certain objective circumstances, not limited to time, and do not require judgment actions when implementing, nor mean that there are other limitations.

[0048] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios to solve corresponding technical problems and achieve corresponding effects, without relying on other features, such as the scheme currently based on. In some scenarios, these features can be combined with other features according to needs. Correspondingly, the apparatuses given in the embodiments of the present application can also implement these features or functions accordingly, which will not be described here.

[0049] In the present application, the same or similar parts among various embodiments can be mutually referred to, unless otherwise specified. In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to, unless otherwise specified and logically conflicted. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship. The implementation modes of the present application described below do not constitute a limitation on the protection scope of the present application.

[0050] FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1, the communication system includes a first node and an AIoT device.

[0051] The first node is configured to send a first carrier to the AIoT device based on a configuration of the first carrier.

[0052] The AIoT device is configured to receive the first carrier and determine a backscattering signal of the first carrier.

[0053] The configuration of the first carrier includes one or more of the following: a power configuration of the first carrier, a carrier spacing configuration of the first carrier, a guard band configuration of the AIoT system, a frequency hopping configuration of the first carrier, a codebook configuration of the first carrier, or a waveform configuration of the first carrier.

[0054] The first carrier is configured to carry modulation information of the AIoT device in the AIoT system.

[0055] In the embodiments of the present application, the first node can be an access network device, or the first node can be a terminal device, or the first node can be a third-party node sending the first carrier, and the embodiments of the present application do not limit this.

[0056] FIG. 2 is a schematic diagram of an application scenario corresponding to the communication system of an embodiment of the present application. As shown in FIG. 2:

[0057] Topology I:

[0058] The communication system shown in FIG. 1 includes a first node and an AIoT device, wherein the first node is an access network device. The corresponding process is as follows:

[0059] Optionally, step one: the AIoT device sends first capability information to the first node. Correspondingly, the first node receives the first capability information from the AIoT device.

[0060] Step two: the first node determines the configuration of the first carrier according to the first capability information.

[0061] Step three: the first node sends first information to the AIoT device. Correspondingly, the AIoT device receives the first information from the first node.

[0062] Step four: the first node sends the first carrier according to the configuration information of the first carrier. Correspondingly, the AIoT device receives the first carrier.

[0063] Step five: the AIoT device sends a backscatter signal to the first node. Correspondingly, the first node receives the backscatter signal from the AIoT device.

[0064] Topology structure two:

[0065] The communication system shown in FIG. 1 includes a first node and an AIoT device, and further includes a third node. The third node can be an access network device, or the third node can be a terminal device. The corresponding process is as follows:

[0066] Optionally, step one: the AIoT device sends first capability information to the first node. Correspondingly, the first node receives the first capability information from the AIoT device.

[0067] Step two: the first node determines the configuration of the first carrier according to the first capability information.

[0068] Step three: the first node sends first information to the AIoT device. Correspondingly, the AIoT device receives the first information from the first node.

[0069] Step four: the first node sends the first information and / or the configuration of the first carrier to the third node. Correspondingly, the third node receives the first information and / or the configuration of the first carrier from the first node.

[0070] Step five: the first node sends the first carrier to the AIoT device. Correspondingly, the AIoT device receives the first carrier from the first node.

[0071] Step six: the AIoT device sends a backscatter signal to the third node. Correspondingly, the third node receives the backscatter signal from the AIoT device.

[0072] It should be understood that the above topology structure one and topology structure two are scenarios in which the first node is directly connected to the AIoT device.

[0073] Topology structure three:

[0074] The communication system shown in FIG. 1 includes a first node and an AIoT device, and further includes a second node. Among them, the first node is a terminal device, and the second node is an access network device. The corresponding process is as follows:

[0075] Optionally, step one: the first node sends second capability information to the second node. Correspondingly, the second node receives the second capability information from the first node.

[0076] Optionally, step two: the AIoT device sends first capability information to the first node. Correspondingly, the first node receives the first capability information from the AIoT device.

[0077] Optionally, step three: the first node sends the first capability information to the second node. Correspondingly, the second node receives the first capability information from the first node.

[0078] Step four: the second node determines the configuration of the first carrier according to the first capability information and / or the second capability information.

[0079] Step five: the second node sends the configuration of the first carrier to the first node. Correspondingly, the first node receives the configuration of the first carrier from the second node.

[0080] Step six: the second node sends first information to the first node. Correspondingly, the first node receives the first information from the second node.

[0081] Step seven: the first node sends the first information to the AIoT device. Correspondingly, the AIoT device receives the first information from the first node.

[0082] Step eight: the first node sends the first carrier to the AIoT device according to the configuration of the first carrier. Correspondingly, the AIoT device receives the first carrier from the first node.

[0083] Step nine: the AIoT device sends a backscatter signal to the first node. Correspondingly, the first node receives the backscatter signal from the AIoT device.

[0084] Among them, the first capability information and / or the second capability information can be acquired and stored in advance by the second node, and the embodiments of the present application do not limit this.

[0085] Topology four:

[0086] The communication system shown in FIG. 1 includes a first node and an AIoT device, and further includes a second node and a third node. Among them, the first node is a terminal device, the second node is an access network device, and the third node is an access network device, or the third node is a terminal device. The corresponding process is as follows:

[0087] Optionally, step one: the first node sends the second capability information to the second node. Correspondingly, the second node receives the second capability information from the first node.

[0088] Optionally, step two: the AIoT device sends the first capability information to the first node. Correspondingly, the first node receives the first capability information from the AIoT device.

[0089] Optionally, step three: the first node sends the first capability information to the second node. Correspondingly, the second node receives the first capability information from the first node.

[0090] Step four: the second node determines the configuration information of the first carrier according to the first capability information and / or the second capability information.

[0091] Step five: the second node sends the configuration of the first carrier to the first node. Correspondingly, the first node receives the configuration of the first carrier from the second node.

[0092] Step six: the second node sends the first information to the first node. Correspondingly, the first node receives the first information from the second node.

[0093] Step seven: the first node sends the first information, and / or the configuration of the first carrier, to the third node. Correspondingly, the third node receives the first information, and / or the configuration of the first carrier, from the first node.

[0094] Step eight: the first node sends the first carrier to the AIoT device according to the configuration of the first carrier. Correspondingly, the AIoT device receives the first carrier from the first node.

[0095] Step nine: the AIoT device sends the backscattering signal to the third node. Correspondingly, the third node receives the backscattering signal from the AIoT device.

[0096] The first capability information and / or the second capability information can be acquired and stored in advance by the second node, which is not limited in the embodiments of the present application.

[0097] In a possible implementation, the second node sends part of the configuration information of the first carrier to the first node, and the other part of the configuration information of the first carrier is predefined, for example, the frequency hopping configuration of the first carrier is predefined, which is not limited in the embodiments of the present application. It should be understood that the above topology structure three and topology structure four are scenarios in which the first node acts as a relay node.

[0098] For the topology structure one and the topology structure two, the first node can determine the configuration of the first carrier according to the first capability information.

[0099] For the topology three and the topology four, the second node determines the configuration of the first carrier according to the first capability information and the second capability information, and can configure the configuration of the first carrier to the first node through radio resource control (RRC) signaling or media access control control element (MAC CE) signaling. The second node can indicate the configuration of the first carrier to the first node through a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) or a newly defined downlink channel carrying downlink control information (for example, downlink control information (DCI)).

[0100] Alternatively, in a possible implementation, the configuration of the first carrier is preconfigured, or in other words, the configuration of the first carrier is predefined.

[0101] In the embodiments of the present application, the first capability information is used to indicate the radio frequency receiving bandwidth capability of the AIoT device.

[0102] For example, the first capability information includes one or more of the following:

[0103] The longest time of the AIoT device for transceiving switching. For example, the longest time of the AIoT device for switching is T1 when the AIoT device is a passive AIoT device, and the longest time of the AIoT device for switching is T3 when the AIoT device is a semi-passive AIoT device.

[0104] The maximum sampling rate of the AIoT device.

[0105] The maximum energy storage capacitor of the AIoT device.

[0106] The silence time of the AIoT device for receiving a reader-to-device (R2D) signal. For example, the silence time is the time during which the AIoT device does not perform any modulation and demodulation actions, and the time can be the energy storage time of the AIoT device.

[0107] Alternatively, the opportunity of the AIoT device for transmitting a backscattering signal.

[0108] In the embodiments of the present application, the second capability information is used to indicate the capability of the first node.

[0109] For example, the second capability information includes one or more of the following: frequency hopping capability of the first node, number of transmit antennas of the first node, or maximum transmit power of the first node.

[0110] In an embodiment of the present application, the first information is used to indicate a resource for the AIoT device to send the backscatter signal.

[0111] The functions of the first node and the AIoT device involved in the embodiments of the present application can be implemented by the communication device 300 in FIG. 3. FIG. 3 is a structural schematic diagram of the communication device 300 provided by the embodiments of the present application. The communication device 300 includes one or more processors 301, a communication line 302, and at least one communication interface (only an example of including a communication interface 304 is shown in FIG. 3, and one processor 301 is taken as an example for description), and optionally further includes a memory 303.

[0112] The processor 301 can be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the present application.

[0113] The communication line 302 can include a path for connecting different components.

[0114] The communication interface 304 can be a transceiver module for communicating with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), etc. For example, the transceiver module can be a transceiver, a transceiver-like device, or the like. Alternatively, the communication interface 304 can also be a transceiver circuit located in the processor 301 to realize the signal input and signal output of the processor.

[0115] The memory 303 can be a device with a storage function. For example, it can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, and can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited thereto. The memory can exist independently and be connected to the processor through the communication line 302. The memory can also be integrated with the processor.

[0116] The memory 303 is configured to store computer-executed instructions for implementing the solutions of the present application, and the processor 301 is configured to control the execution of the computer-executed instructions stored in the memory 303. The processor 301 is configured to execute the computer-executed instructions stored in the memory 303, so as to implement the communication method provided in the embodiments of the present application.

[0117] Alternatively, in the embodiments of the present application, the processor 301 can execute the processing-related functions in the communication method provided in the embodiments of the present application, and the communication interface 304 is responsible for communication with other devices or communication networks, which is not limited in the embodiments of the present application.

[0118] Alternatively, in the embodiments of the present application, the computer-executed instructions can also be referred to as application program codes, which are not limited in the embodiments of the present application.

[0119] In a specific implementation, as an embodiment, the processor 301 can include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.

[0120] In a particular implementation, as an example, the communication apparatus 300 can include multiple processors, such as the processor 307 and the processor 301 in FIG. 3. Each of the processors can be a single-core processor or a multi-core processor. The processor herein can include, but is not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, and the like, each of which is a computing device running software and can include one or more cores for executing software instructions to perform operations or processing.

[0121] In a particular implementation, as an example, the communication apparatus 300 can further include an output device 305 and an input device 306. The output device 305 is in communication with the processor 301 and can display information in various ways. For example, the output device 305 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, and the like. The input device 306 is in communication with the processor 301 and can receive user input in various ways. For example, the input device 306 can be a mouse, a keyboard, a touch screen device, a sensor device, or the like.

[0122] The communication apparatus 300 described above can also be referred to as a communication apparatus, which can be a general-purpose device or a special-purpose device. For example, the communication apparatus 300 can be a desktop computer, a laptop computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless AIoT device, an embedded device, or a device having a similar structure as shown in FIG. 2. The embodiments of the present application do not limit the type of the communication apparatus 300.

[0123] In addition, the constituent structure shown in FIG. 3 does not constitute a limitation on the communication apparatus, and the communication apparatus can include more or fewer components than those shown in FIG. 3, or combine certain components, or have a different arrangement of components.

[0124] It should be noted that in the embodiments described below, the names of messages between network elements, the names of parameters, or the names of information, and the like are only examples, and in other embodiments, other names can also be used, and the communication method provided by the present application does not specifically limit this.

[0125] It can be understood that, in the embodiments of the present application, each network element can perform part or all of the steps in the embodiments of the present application, and these steps or operations are only examples, and the embodiments of the present application can also perform other operations or variations of various operations. In addition, each step can be performed in a different order as presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application are performed.

[0126] The communication method provided by the embodiments of the present application will be described below in conjunction with FIGS. 4-17.

[0127] For example, FIG. 4 is a flow diagram of an example of a communication method provided by the embodiments of the present application. In this communication method, unless otherwise specified, the topology structure one described in FIG. 2 is taken as an example for general example description, and it should be understood that the other three topologies described above can be adaptively modified according to the examples in the method 400, and all are within the protection scope of the embodiments of the present application, which are uniformly described here, and the following will not be described again. As shown in FIG. 4, the method 400 includes:

[0128] S410, the first node sends the first carrier to the AIoT device based on the configuration of the first carrier. Correspondingly, the AIoT device receives the first carrier.

[0129] In the embodiments of the present application, the first carrier is used to carry the modulation information of the AIoT device in the AIoT system. Or, the first carrier is used to carry the modulation information sent to the AIoT device in the AIoT system.

[0130] In the embodiments of the present application, the first carrier can be a single-frequency carrier, a double-frequency carrier, or a carrier with more than two frequencies, which is not limited in the embodiments of the present application. The embodiments of the present application will be described taking the single-frequency carrier and the double-frequency carrier as examples.

[0131] In the embodiments of the present application, the configuration of the first carrier includes one or more of the following: power configuration of the first carrier, carrier spacing configuration of the first carrier, guard band configuration of the AIoT system, frequency hopping configuration of the first carrier, codebook configuration of the first carrier, or waveform configuration of the first carrier. Of course, the configuration of the first carrier can also include other configurations, which is not limited in the embodiments of the present application.

[0132] In the embodiments of the present application, the power configuration of the first carrier includes the power threshold of the first channel, and the first channel is used to carry the first carrier, or in other words, the first carrier is transmitted on the first channel.

[0133] The power threshold of the first channel is determined according to a first relationship, the first relationship is that a ratio of total interference power of the first channel to the second channel to total power of the first channel is less than an absolute value of a first difference value, the first difference value is a difference value between the power threshold of the second channel and the power threshold of the first channel, and the second channel is a channel adjacent to or separated from the first channel.

[0134] The power threshold of the first channel will be introduced in two cases.

[0135] Case one: multi-node scenario.

[0136] The multi-node scenario can be understood as that the number of nodes sending the first carrier in the AIoT system is less than or equal to a first threshold. Optionally, the bandwidths of the first channel and the second channel are the same. The bandwidths of the first channel and the second channel can be determined by the channel bandwidth of the AIoT system and the number of nodes sending the first carrier in the AIoT system. For example, the channel bandwidth of the AIoT system is divided by the number of nodes sending the first carrier in the AIoT system.

[0137] For example, for the multi-node scenario, the first relationship can be as shown in FIG. 5, wherein the width of each block represents the bandwidth of the channel, the height of each block represents the power threshold of the channel, channel 10 represents the first channel, the second channel can be the channel adjacent to the first channel, that is, channel 11, the second channel can be the channel separated from the first channel by one channel, that is, channel 12, the second channel can be the channel separated from the first channel by two channels, that is, channel 13, the second channel can be the channel separated from the first channel by three channels, or the second channel can be the channel separated from the first channel by more than three channels, for example, channel 14.

[0138] The first relationship satisfied by the channel 10 and the channel 11 can be as follows: |X-Y|=1:10log10(P(X) / P(Y))<(B-A)dB

[0139] The first relationship satisfied by the channel 10 and the channel 12 can be as follows: |X-Y|=2:10log10(P(X) / P(Y))<(C-A)dB

[0140] The first relationship satisfied by the channel 10 and the channel 13 can be as follows: |X-Y|=3:10log10(P(X) / P(Y))<(D-A)dB

[0141] The first relationship satisfied by the channel 10 and the channel 14 or the channel separated from the channel 10 by more than three channels can be as follows: |X-Y|>3:10log10(P(X) / P(Y))<(E-A)dB

[0142] Wherein, P() represents the total power on the channel, A~E represents the power threshold of the channel, is the absolute value, Y represents the first channel, X represents the second channel, and |X-Y| represents the ratio of the total interference power of the first channel to the second channel to the total power of the first channel.

[0143] Case two: dense node scenario.

[0144] The dense node scenario can be understood as that the number of nodes sending the first carrier in the AIoT system is greater than a first threshold. Optionally, the bandwidths of the first channel and the second channel are different. In a possible implementation, the power configuration of the first carrier further includes the bandwidth of the first channel, for example, the power configuration of the first carrier includes the specific value of the bandwidth of the first channel. In another possible implementation, the bandwidth of the first channel is determined based on a first rule. Alternatively, the bandwidth of the first channel can be predefined, and the embodiments of the present application do not limit this.

[0145] The first rule can include one or more of the following: the bandwidth of the first channel is an integer multiple or a fractional multiple of the bandwidth corresponding to the preamble or the start indication, the bandwidth of the first channel is an integer multiple or a fractional multiple of the bandwidth corresponding to the R2D control information, the bandwidth of the first channel is an integer multiple or a fractional multiple of the bandwidth corresponding to the time unit of the communication system, the bandwidth of the first channel is an integer multiple or a fractional multiple of the SCS, or is another rule, and the embodiments of the present application do not limit this.

[0146] It should be noted that the communication system can be, for example, a new radio (NR) system. When exemplifying, the communication system is introduced as an NR system, and the following is uniformly described.

[0147] Exemplarily, for the dense node scenario, the first relationship is shown in FIG. 6, wherein the width of each box represents the bandwidth of the channel, the height of each box represents the power threshold of the channel, the channel 10 represents the first channel, the second channel can be the channel adjacent to the first channel, that is, the channel 11, the second channel can be the channel separated from the first channel by one channel, that is, the channel 12, the second channel can be the channel separated from the first channel by two channels, that is, the channel 13, the second channel can be the channel separated from the first channel by three channels, or the second channel can be the channel separated from the first channel by more than three channels, for example, the channel 14.

[0148] The first relationship satisfied by the channel 10 and the channel 11 can be as follows: |n|=1: 10log10(P(YBW) / P(XBW))<(B-A)dB

[0149] The first relationship satisfied by channel 10 and channel 12 can be as follows: |n|=2: 10log10(P(YBW) / P(XBW))<(C-A)dB

[0150] The first relationship satisfied by channel 10 and channel 13 can be as follows: |n|=3: 10log10(P(YBW) / P(XBW))<(D-A)dB

[0151] The first relationship satisfied by channel 10 and channel 14 or a channel separated from channel 10 by more than three channels can be as follows: |n|>3: 10log10(P(YBW) / P(XBW))<(E-A)dB

[0152] Wherein, P() represents the total power on the channel, A-E represents the power threshold of the channel, is the absolute value, XBW represents the bandwidth of the second channel, YBW represents the bandwidth of the first channel, |n| represents the ratio of the total interference power of the first channel to the second channel to the total power of the first channel, for example, the second channel is channel 11, n is 1, the second channel is channel 12, n is 2, and the like.

[0153] It should be understood that the configuration of the power threshold of the channel is also applicable to the configuration of the R2D signal, and the embodiments of the present application are not limited thereto.

[0154] In the embodiments of the present application, the power configuration of the R2D channel includes the power threshold of the third channel, the third channel is used to carry the R2D signal, or in other words, the R2D signal is transmitted on the third channel.

[0155] Wherein, the power threshold of the third channel is determined according to a second relationship, the second relationship is that the ratio of the total interference power of the third channel to the fourth channel to the total power of the third channel is less than the absolute value of the second difference value, the second difference value is the difference between the power threshold of the fourth channel and the power threshold of the third channel, and the fourth channel is a channel adjacent to or separated from the third channel.

[0156] The power threshold of the third channel will be introduced in two cases as follows.

[0157] Case one: multi-node scenario.

[0158] The multi-node scenario can be understood as the number of nodes sending R2D in the AIoT system is less than or equal to a fifth threshold. Optionally, the bandwidths of the third channel and the fourth channel are the same. Wherein, the bandwidths of the third channel and the fourth channel can be determined by the channel bandwidth of the AIoT system and the number of nodes sending R2D in the AIoT system. For example, the channel bandwidth of the AIoT system is divided by the number of nodes sending R2D in the AIoT system.

[0159] For example, for a multi-node scenario, the second relationship can be as shown in FIG. 5, where the width of each box represents the bandwidth of the channel, the height of each box represents the power threshold of the channel, the third channel 10 represents the third channel, the fourth channel can be the channel adjacent to the third channel, i.e., the channel 11, the fourth channel can be the channel separated from the third channel by one channel, i.e., the channel 12, the fourth channel can be the channel separated from the third channel by two channels, i.e., the channel 13, the fourth channel can be the channel separated from the third channel by three channels, or the fourth channel can be the channel separated from the third channel by more than three channels, such as the channel 14.

[0160] The first relationship satisfied by the channel 10 and the channel 11 can be as follows: |X-Y|=1:10log10(P(X) / P(Y))<(B-A)dB

[0161] The first relationship satisfied by the channel 10 and the channel 12 can be as follows: |X-Y|=2:10log10(P(X) / P(Y))<(C-A)dB

[0162] The first relationship satisfied by the channel 10 and the channel 13 can be as follows: |X-Y|=3:10log10(P(X) / P(Y))<(D-A)dB

[0163] The first relationship satisfied by the channel 10 and the channel 14 or the channel separated from the channel 10 by more than three channels can be as follows: |X-Y|>3:10log10(P(X) / P(Y))<(E-A)dB

[0164] Where P() represents the total power on the channel, A-E represents the power threshold of the channel, is the absolute value, Y represents the third channel, X represents the fourth channel, and |X-Y| represents the ratio of the total interference power of the third channel to the fourth channel to the total power of the third channel.

[0165] Case two: dense node scenario.

[0166] The dense node scenario can be understood as the number of nodes sending R2D in the AIoT system being greater than a fifth threshold. Optionally, the bandwidths of the third channel and the fourth channel are different. In a possible implementation manner, the power configuration of the R2D further includes the bandwidth of the third channel, for example, the power configuration of the third carrier includes a specific value of the bandwidth of the third channel. In another possible implementation manner, the bandwidth of the third channel is determined based on a first rule. Alternatively, the bandwidth of the third channel can be predefined, and the embodiments of the present application do not limit this.

[0167] The first rule can include one or more of the following: the bandwidth of the third channel is an integer or fractional multiple of the bandwidth corresponding to the preamble or start indication, the bandwidth of the third channel is an integer or fractional multiple of the bandwidth corresponding to the R2D control information, the bandwidth of the third channel is an integer or fractional multiple of the bandwidth corresponding to a time unit of the communication system, the bandwidth of the third channel is an integer or fractional multiple of the SCS, or other rules, which are not limited in the embodiments of the application.

[0168] For example, for a dense node scenario, the second relationship is shown in FIG. 6, where the width of each box represents the bandwidth of the channel, and the height of each box represents the power threshold of the channel. Channel 10 represents the first channel. The fourth channel can be the channel adjacent to the third channel, i.e., channel 11. The fourth channel can be the channel separated from the first channel by one channel, i.e., channel 12. The fourth channel can be the channel separated from the third channel by two channels, i.e., channel 13. The fourth channel can be the channel separated from the third channel by three channels, or the fourth channel can be the channel separated from the third channel by more than three channels, such as channel 14.

[0169] The first relationship satisfied by channel 10 and channel 11 can be as follows: |n|=1: 10log10(P(YBW) / P(XBW))<(B-A)dB

[0170] The first relationship satisfied by channel 10 and channel 12 can be as follows: |n|=2: 10log10(P(YBW) / P(XBW))<(C-A)dB

[0171] The first relationship satisfied by channel 10 and channel 13 can be as follows: |n|=3: 10log10(P(YBW) / P(XBW))<(D-A)dB

[0172] The first relationship satisfied by channel 10 and channel 14 or the channel separated from channel 10 by more than three channels can be as follows: |n|>3: 10log10(P(YBW) / P(XBW))<(E-A)dB

[0173] Wherein, P() represents the total power on the channel, A-E represents the power threshold of the channel, is the absolute value, XBW represents the bandwidth of the fourth channel, YBW represents the bandwidth of the third channel, |n| represents the ratio of the total interference power of the third channel to the fourth channel to the total power of the third channel, for example, the fourth channel is channel 11, n is 1, the fourth channel is channel 12, n is 2, and so on, which will not be repeated here. In the embodiment of the application, the first carrier includes a first frequency subcarrier and a second frequency subcarrier (that is, the first carrier is a dual-frequency carrier), and the configuration information of the first carrier includes the gap configuration of the first carrier. The carrier gap configuration of the first carrier includes the gap between the first frequency and the second frequency. In this scheme, the first carrier including the first frequency subcarrier and the second frequency subcarrier can obtain frequency diversity gain.

[0174] In a possible implementation, the gap satisfies one or more of the following constraint conditions: a first constraint condition, a second constraint condition, a third constraint condition, or a fourth constraint condition.

[0175] The first constraint condition is that the gap is greater than or equal to a frequency offset of the backscattering signal of the AIoT device. Optionally, the frequency offset of the backscattering signal is indicated by the access network device, or the frequency offset of the backscattering signal is preconfigured, which is not limited in the embodiment of the application.

[0176] The second constraint condition is that the interference measurement quantity is greater than a second threshold. The interference measurement quantity is a measurement quantity of the interference of the AIoT system to a coexistence system, and the coexistence system includes the AIoT system and a communication system. Optionally, the second threshold can be set by the access network device, or the second threshold can also be the radio frequency time scale of the AIoT device.

[0177] For example, as shown in FIG. 7, the first node measures the backscattering signal, and the measured third harmonic component falls within the frequency band of the coexistence system (such as f1-3f* and f2+3f*), f1 represents the first frequency, f2 represents the second frequency, and 3f* represents the third harmonic component. The first node determines that the interference measurement quantity is greater than the second threshold.

[0178] In a possible implementation, the interference measurement quantity is obtained by periodic measurement. For example, the first node configures a time window for periodic measurement of the coexistence system according to a configured device to reader (D2R) transmission time slot of the AIoT device, wherein the length of the time window is related to the D2R transmission time slot. For another example, the first node configures a periodic measurement window and a reporting opportunity. Alternatively, the periodic measurement can also be configured in other manners, which is not limited in the embodiment of the application.

[0179] In another possible implementation, the interference measurement quantity is obtained through non-periodic measurement, and embodiments of the present application do not limit this.

[0180] In particular, for the topology three and the topology four described in FIG. 2, the second node can indicate the reporting resource and the reporting manner of the interference measurement quantity to the first node, or the second node can indicate the reporting resource and the reporting manner of the interference measurement quantity to the first node in response to the request of the first node, and embodiments of the present application do not limit this.

[0181] For example, the interference measurement quantity can include one or more of the following: reference signal receiving power (RSRP), received signal strength indication (RSSI), or reference signal received quality (RSRQ). Optionally, the interference measurement quantity is related to sideband interference, harmonic interference, etc.

[0182] The third constraint condition is that the interval is less than or equal to the transmission bandwidth of the AIoT system.

[0183] For example, the transmission bandwidth of the AIoT system can be predefined. In particular, for the topology three and the topology four shown in FIG. 2, the second node can configure the transmission bandwidth of the AIoT system for the first node in response to the request of the first node, and embodiments of the present application do not limit this.

[0184] For the topology one and the topology two described in FIG. 2, the first node can determine the interval according to the transmission bandwidth of the AIoT system. For example, when the downlink bandwidth is 1.4MHz (N DL RB = 6), 3MHz (N DL RB = 15), or 5MHz (N DL RB = 25), only one interval value can be selected, and the corresponding frequency offset value N gap1 is 3 when gap = 3 for 1.4MHz, 8 for 3MHz, and 12 for 5MHz.

[0185] For the topology three and the topology four described in FIG. 2, in the small bandwidth mode, the interval can be predefined. In the large bandwidth mode, the second node configures the bandwidth of the transmission resource for the AIoT system for the first node to be greater than 5MHz, and then the second node can indicate the interval to the first node through the DCI shown in Table 1.

[0186] Table 1

[0187] The fourth constraint condition is that the coherence bandwidth satisfies any one of the following: the transmission bandwidth of the AIoT system is greater than the coherence bandwidth; the interval is greater than the coherence bandwidth; the interval is greater than a second difference value, and the second difference value is a difference between the coherence bandwidth and a first sum value, and the first sum value is a sum of twice the BLF and twice the guard band bandwidth of the AIoT system; wherein the coherence bandwidth is obtained through channel measurement.

[0188] Through the fourth constraint condition, the AIoT system channel bandwidth or the interval is greater than the coherence bandwidth, and the frequency diversity gain is obtained (it needs to be noted that in a multipath channel with small delay spread (for example, 30 ns), the frequency diversity gain will be reduced because the interval becomes small or less than the coherence bandwidth of the channel (for example, 33.3 MHz for a delay spread of 30 ns)).

[0189] For example, assuming that the delay spread of an indoor non line of sight (NLOS) channel is 100 ns, corresponding to a 10 MHz coherence bandwidth. Considering a 20 MHz communication system subband, and placing the first frequency and the second frequency at the leftmost and rightmost edges of the subband, so that the interval is greater than the coherence bandwidth to obtain optimal frequency selection diversity gain.

[0190] For example, the relevant bandwidth can be determined by the method shown in FIG. 8. The first node indicates that the AIoT device is full reflection, the first node sends an unmodulated carrier signal, the second node receives the carrier signal and measures the relevant bandwidth, and the measurement result is reported to the first node. Wherein, the full reflection refers to that the AIoT device sends a bit 1 signal through on-off keying (OOK) modulation.

[0191] In the embodiments of the present application, the guard band configuration of the AIoT system includes the guard band bandwidth of the AIoT system, and the left half of the guard band bandwidth of the AIoT system bandwidth is equal to the right half of the guard band bandwidth of the AIoT system bandwidth.

[0192] The guard band bandwidth of the AIoT system is related to one or more of the following: the maximum interval of the carrier corresponding to the AIoT system, wherein the carrier includes a plurality of frequencies, and the maximum interval of the carrier is the interval between the minimum frequency and the maximum frequency in the plurality of frequencies included by the carrier; the transmission bandwidth of the AIoT system; the transmission bandwidth of the communication system and the guard band bandwidth of the communication system; the subcarrier interval of the coexistence system, the coexistence system including the AIoT system and the communication system.

[0193] For the maximum interval of the carrier corresponding to the AIoT system:

[0194] For example, for the first carrier including two frequency subcarriers (for example, 900MHz and 905MHz), the interval is 5MHz, the IM3 interference of OOB will be located at 895MHz and 910MHz, and the setting of the guard band of the AIoT system should at least include the range of the two frequency bands of 895MHz and 910MHz

[0195] For example, for phase noise, a reasonable guard band of the AIoT system should be set according to the phase noise characteristics of the local oscillator. For example, for a phase noise of -110dbc / Hz@1MHz, whether the phase noise at 1MHz on the left and right sides of the two frequency subcarriers included in the first carrier meets the RF emission index should be referred to, so as to avoid causing interference to the coexisting system.

[0196] For the transmission bandwidth of the AIoT system:

[0197] For example, in a 10MHz communication system bandwidth, 1.4MHz is used for transmission of the AIoT system, and the guard band of the AIoT system related to 1.4MHz needs to be set on the left and right sides of 1.4MHz, and the range of the guard band of the AIoT system is not greater than 1.4MHz.

[0198] For the transmission bandwidth of the communication system and the guard band bandwidth of the communication system:

[0199] For example, to avoid interference of signal leakage of the communication system to the AIoT system, a guard band is set on the left and right sides of the transmission bandwidth of the communication system, and the setting of the guard band will affect the setting of the guard band of the AIoT system.

[0200] For the subcarrier spacing of the coexisting system:

[0201] For example, for a 180KHz channel bandwidth and a 15KHz subcarrier, the guard band is also 15KHz on the left and right sides.

[0202] In the embodiments of the present application, as shown in FIG. 9, in one possible implementation, the transmission bandwidth of the communication system includes the guard band bandwidth of the AIoT system, in another possible implementation, the guard band bandwidth of the communication system includes the transmission bandwidth of the AIoT system and the guard band bandwidth of the AIoT system, or as one possible implementation, the AIoT system is independently deployed, and the transmission bandwidth and the guard band bandwidth of the AIoT system are independently deployed.

[0203] Exemplarily, for the case that the transmission bandwidth of the communication system includes the guard band bandwidth of the AIoT system, the guard band bandwidth of the AIoT system is related to one or more of the following: the channel bandwidth of the AIoT system, the number of resource blocks (RBs), the sampling frequency offset of the AIoT device, or a scaling factor. As shown below: GB Channel = (BW AIoT,Channel × 1000 (kHz) - N RB × SCS × 12) / 2 - SCS / 2 ± BW SFOmax - [X * GB NR ]

[0204] wherein BW AIoT,Channel represents the channel bandwidth of the AIoT system, N RB represents the number of RBs, BW SFOmax represents the capability-related sampling frequency offset of the AIoT device, which is generally 100 ppm ~ 100,000 ppm corresponding to the frequency offset, and ± represents that the range of the frequency offset error can be positive or negative, but when setting the guard band of the AIoT system, the worst case should be taken as the principle of design (for example, only the positive sign can be considered). - [X * GB NR ] is optional, mainly used to set the guard band of the transmission bandwidth of the communication system when the communication system coexists with the AIoT system, and X represents the scaling factor (X <= 1), which can be indicated by a high-layer parameter.

[0205] It should be noted that for the R2D signal, since the R2D signal is a modulated signal and the minimum time unit is a chip, multiple R2D signals can be sent simultaneously in the R2D signal transmission bandwidth through FDMA, so the setting of the guard band is different from that of the AIoT system.

[0206] Exemplarily, for OOK-1, since there is only one chip in one NR symbol, the setting of the guard band is similar to the setting of the transmission bandwidth of the communication system including the guard band bandwidth of the AIoT system.

[0207] Exemplarily, for OOK-4, assuming that one NR symbol contains M chips, the calculation formula is as follows: GB Channel = (BW AIoT,Channel × 1000 (kHz) - N RB × (M * SCS) × 12) / 2 - SCS / 2 + BW SFOmax - [X * GB NR ]

[0208] Wherein, one RB of the R2D signal occupies 12 subcarriers, M*SCS represents the subcarrier spacing of one chip, SCS represents the subcarrier spacing of one NR OFDM symbol, and the time domain is represented as one OFDM symbol having M chips (for example, as shown in FIG. 10, M = 10).

[0209] Or, the calculation formula is as follows: GB Channel = (BW AIoT,Channel × 1000 (kHz) - N RB × (M*SCS) × N) / 2 - SCS / 2 + BW SFOmax - [X*GB NR ]

[0210] Wherein, one RB of the R2D signal occupies N subcarriers (N≠12), and the AIoT system occupies N subcarriers (occupied BW), wherein N is a positive integer greater than or equal to 1, and the subcarriers can be continuous or discontinuous. RB The number of RBs of the NR system can also represent the number of RBs defined by the AIoT system, and the value can be a positive integer greater than or equal to 1.

[0211] For example, for the case that the guard band bandwidth of the communication system includes the transmission bandwidth of the AIoT system and the guard band bandwidth of the AIoT system, the guard band bandwidth of the AIoT system is related to one or more of the following: the guard band transmission bandwidth of the communication system, the number of RBs, or the sampling frequency offset of the AIoT device. As shown below: GB Channel = (BW NR,GBChannel × 1000 (kHz) - N RB × SCS × 12) / 2 - SCS / 2 - BW AIoT,Channel + BW SFOmax

[0212] Wherein, BW NR,GBChannel represents the guard band transmission bandwidth of the NR system, BW AIoT,Channel represents the transmission bandwidth of the AIoT system, N RB represents the number of RBs, and BW SFOmax represents the sampling frequency offset related to the device capability, which generally takes a value of 100ppm-100000ppm corresponding to the frequency offset.

[0213] In the embodiments of the present application, the frequency hopping configuration of the first carrier includes one or more of the following: a frequency offset value, or a frequency hopping mode of the first carrier, or a starting RB position of the frequency hopping of the first carrier.

[0214] In the embodiments of the present application, the frequency offset value is determined based on a second rule, and the second rule includes one or more of the following:

[0215] The frequency offset value is less than or equal to a number of resource blocks (RBs) of a transmission bandwidth of the AIoT system corresponding to the first carrier.

[0216] The frequency of the first carrier is a single frequency, and the frequency offset value is a frequency offset value of frequency hopping of the first carrier in adjacent time units. For example, the first carrier has a first frequency value in a first time unit and a second frequency value in a second time unit. The difference between the first frequency value and the second frequency value is the frequency offset value. The frequency offset value cannot exceed the number of RBs of the AIoT system. For example, when the system bandwidth of the AIoT system is 1.4 MHz and the initial frequency position is located at the start of the RB, the frequency offset value does not exceed 8 RBs (assuming that the SCS is 15 KHz).

[0217] The frequency offset value is greater than or equal to an interval between the first frequency and the second frequency.

[0218] The first carrier includes a first frequency subcarrier and a second frequency subcarrier, and the frequency offset value is a difference between the first frequency and the second frequency in the same time unit. For example, when the first carrier includes a first frequency subcarrier and a second frequency subcarrier, the interval between the first frequency and the second frequency is 5 RBs, and the initial frequency of the first carrier is located at the first RB and the sixth RB, respectively, in the second hop of frequency hopping, it is assumed that the first RB jumps to the third RB, and the sixth RB needs to jump to at least the eighth RB to ensure that the interval setting requirement is met. The relationship can be expressed as follows:

[0219] Optionally, to compensate for the SFO of the AIoT device, the frequency hopping configuration of the first carrier needs to consider the SFO. For example, the frequency offset value includes compensation of the SFO (assuming that the first node has obtained the maximum SFO of the AIoT device).

[0220] Alternatively, the frequency offset value is determined based on the frequency of the backscattering signal of the AIoT device.

[0221] The frequency offset value of the frequency hopping and the frequency of the backscattering signal of the AIoT device are related as follows: To ensure that the D2R signal is reflected within the system bandwidth of the AIoT system, the size of the frequency offset value should consider reserving a position for the AIoT device to modulate the first carrier to transmit the D2R signal. For example, the first carrier is located in the middle of the AIoT transmission bandwidth, that is, f=BW / 2, and BLF is BW / 10, and the frequency offset value cannot exceed BW / 2-BW / 10=2 / 5BW.

[0222] In a possible implementation, the frequency hopping configuration of the first carrier can not include the frequency offset value, and the first node can determine the frequency offset value through the frequency of the backscattering signal or the guard band of the AIoT system.

[0223] In the embodiments of the present application, the frequency hopping manner of the first carrier includes one or more of the following: intra-time-unit frequency hopping, or inter-time-unit frequency hopping.

[0224] In a possible implementation, the intra-time-unit frequency hopping includes one or more of the following: frequency hopping once within a time unit, frequency hopping multiple times within a time unit with the same frequency offset value, or frequency hopping multiple times within a time unit with different frequency offset values.

[0225] The first carrier can not carry any information, i.e., the first carrier is unmodulated, and the time unit can be a frame, a subframe, a slot, or a symbol. It should be noted that the time unit is at least a symbol to enable intra-time-unit frequency hopping. For example, one NR symbol includes M chips, and the frequency offset value of the frequency hopping corresponding to [0, M / 2] chips is different from the frequency offset value of the frequency hopping corresponding to [M / 2, M] chips.

[0226] As shown in FIG. 11, a schematic diagram of frequency hopping multiple times with different frequency offset values when the first carrier is a single frequency is provided in the embodiments of the present application. As shown in FIG. 12, a schematic diagram of frequency hopping multiple times with the same frequency offset value when the first carrier includes a first frequency subcarrier and a second frequency subcarrier is provided in the embodiments of the present application.

[0227] In a possible implementation, the inter-time-unit frequency hopping includes one or more of the following: frequency hopping multiple times between any two adjacent time units with the same frequency offset value, frequency hopping multiple times between any two adjacent time units with different frequency offset values, frequency hopping between any two time units separated by multiple time units with the same frequency offset value, or frequency hopping between any two time units separated by multiple time units with different frequency offset values.

[0228] The time unit can be a frame, a subframe, a slot, a symbol, or a chip.

[0229] As shown in FIG. 13, a schematic diagram of frequency hopping with the same frequency offset value between time units separated by multiple time units when the first carrier is a single frequency is provided in the embodiments of the present application. As shown in FIG. 14, a schematic diagram of frequency hopping multiple times between any two adjacent time units with different frequency offset values when the first carrier includes a first frequency subcarrier and a second frequency subcarrier is provided in the embodiments of the present application.

[0230] It should be noted that the intra-time-unit frequency hopping and the inter-time-unit frequency hopping can be indicated by a high-layer parameter, for example, RRC signaling.

[0231] It should be noted that, in order to avoid the first carrier exceeding the transmission bandwidth of the AIoT system when the frequency of the current first carrier is located at the edge sub-band of the transmission bandwidth of the AIoT system, the frequency hopping of the next time unit should be to the opposite direction sub-band. For example, if the value of the current time unit quantity (for example, the time slot quantity of one subframe or the chip quantity of one symbol) modulo 2 is equal to 1, the frequency hopping direction is unchanged; otherwise, the frequency hopping direction is to the opposite direction, wherein the frequency hopping direction can be the frequency corresponding to the AIoT system bandwidth from small to large.

[0232] In the embodiments of the present application, the starting RB position of the first carrier frequency hopping is determined based on the third rule, and the third rule includes one or more of the following:

[0233] The starting RB position of the first carrier frequency hopping is included in the transmission resource message of the first carrier indicated by the high-layer parameter.

[0234] For example, the transmission resource of the first carrier is configured by the high-layer parameter, which is used to schedule the transmission resource of the AIoT system and the frequency hopping mode and frequency hopping parameters of the first carrier. The frequency hopping parameters include the starting RB of the first carrier frequency hopping. In one possible implementation, the high-layer parameter configures the parameters of the first carrier and the starting RB, and does not need to hop; in another possible implementation, the high-layer parameter configures the parameters of the first carrier and the starting RB, and needs to hop.

[0235] The starting RB position of the first carrier frequency hopping is a predefined position corresponding to the predefined transmission resource of the first carrier.

[0236] For example, the starting RB of the first carrier is located at the middle RB of the transmission bandwidth of the AIoT system.

[0237] The starting RB position of the first carrier frequency hopping in the current time unit is indicated by the indication information.

[0238] For example, the starting RB of the first carrier in the current time unit can be determined by the indication information (for example, DCI_1) corresponding to the current RB, or can be determined by the indication information of the same RB in the previous time unit and the corresponding starting RB position. For example, in order to obtain the position of the starting RB of the first carrier in the current time unit, the RB position of the time unit before the current time unit can be demodulated, and the frequency offset and time offset indication information can be configured to obtain the position of the RB in the current time unit.

[0239] It should be noted that for the topology structure one and the topology structure two shown in FIG. 2, the frequency hopping information can be configured by a high layer parameter frequencyhopping, for example, configured by RRC, activated by MAC CE. The frequency hopping configuration includes: whether to hop, RB initial position, regular hopping / irregular hopping, frequency offset value, inter-time unit hopping / intra-time unit hopping, and whether the frequency offset value compensates the SFO of the AIoT device. For example, the RRC configuration information includes 2bit information GroupHopping{neither, enable, disable}, wherein neither represents no hopping, enable represents regular hopping, and disable represents irregular hopping. Alternatively, the frequency hopping information can be determined by implicit indication, for example, the starting position of the RB is determined by the following implicit manner:

[0240] It should be noted that for the topology structure three and the topology structure four shown in FIG. 2, when the first node transmits the first carrier, the frequency hopping configuration of the first carrier is scheduled by the second node. The frequency hopping configuration can refer to the frequency hopping configuration of the above topology structure one and the topology structure two.

[0241] In a possible implementation manner, the second node schedules the frequency hopping configuration of the first carrier by RRC signaling. The RRC configuration information / MAC CE / downlink control information (DCI) includes 2bit information GroupHopping{neither, enable, disable}, wherein neither represents no hopping, enable represents regular hopping, and disable represents irregular hopping.

[0242] Alternatively, as a possible implementation manner, the frequency hopping configuration of the first carrier can be determined by a predefined manner, for example, a predefined frequency offset value:

[0243] The starting position of the RB can also be predefined: according to the AIoT transmission bandwidth, the first capability information, and the VRB-to-PRB mapping rule, the starting position of the RB is determined. For example, after the current number of time units (for example, the number of slots of a subframe, or the number of chips of a symbol) is taken modulo 2, if the value is equal to 1, the starting position of the RB remains unchanged; otherwise, the starting position of the RB needs to consider the size of the AIoT transmission bandwidth or (BWP).

[0244] In the embodiments of the present application, the codebook configuration of the first carrier includes codebook information of a space frequency block code (SFBC) mechanism of the first carrier, and the codebook information of the SFBC mechanism of the first carrier is used for the first node to map the symbol of the first carrier to the antenna port based on the fifth rule. Through the codebook information of the SFBC mechanism, the first carrier can enable the receiver to obtain frequency diversity gain and spatial diversity gain.

[0245] wherein the fifth rule includes that when the symbol of the first carrier of the first frequency subcarrier and the second frequency subcarrier is mapped to the frequency domain resource outside the transmission bandwidth of the AIoT system, the frequency domain resource of the first carrier is configured by a high-level parameter. As follows:

[0246] wherein, denotes the offset value outside the frequency offset of the transmission bandwidth of the AIoT system scheduled by the NR system, which can be determined by a high-level parameter to avoid interference to PDCCH or PDSCH or SSB or NR reference signal (for example, CSI-RS) transmission.

[0247] For example, the rule of mapping the symbol of the first carrier to the antenna port includes: the symbol of the first frequency subcarrier is mapped to the first antenna port, and the symbol of the second frequency subcarrier is mapped to the second antenna port; or, the symbol of the first frequency subcarrier is mapped to the second antenna port, and the symbol of the second frequency subcarrier is mapped to the first antenna port, which is not limited in the embodiments of the present application.

[0248] It should be noted that the symbol of the first carrier can be an unmodulated symbol or a modulated symbol (for example, BPSK modulation). The symbol of the first carrier mapped to the first antenna port or the second antenna port can be in phase or in opposite phase according to the codebook matrix. The symbol of the first carrier mapped to the first antenna port or the second antenna port can be the same power or different power. When the first frequency subcarrier and the second frequency subcarrier included in the first carrier are mapped to the first antenna port and the second antenna port, they can be mapped simultaneously or at different times, which is not limited in the embodiments of the present application.

[0249] It should be noted that the subcarrier for mapping the symbol of the first carrier can be an RE, an RB or a newly defined frequency domain resource, which is not limited in the embodiments of the present application.

[0250] It should be noted that when the transmission of the first carrier including the first frequency subcarrier and the second frequency subcarrier is located within the transmission bandwidth of the AIoT system, the mapped frequency domain unit does not cause interference to the coexisting system; if the frequency domain unit of the first carrier transmission including the first frequency subcarrier and the second frequency subcarrier is mapped outside the transmission bandwidth of the AIoT system, it may cause interference to the coexisting system.

[0251] For example, the codebook information of the SFBC mechanism is shown in Tables 2 to 7, wherein Tables 2 to 7 all represent equal power transmission.

[0252] Table 2

[0253] Table 3

[0254] Table 4

[0255] Table 5

[0256] Table 6

[0257] Table 7

[0258] It should be noted that for the case of non-equal power transmission, only the coefficients need to be changed, and the embodiments of the present application do not limit this. For the modulated symbols of the first carrier, the codebook is similar to that of the unmodulated one, and the subscript of x needs to be modified to distinguish different symbols.

[0259] It should be noted that in the embodiments of the present application, the channels experienced by the antennas should have low correlation to obtain frequency diversity gain, which can be achieved by a large enough antenna spacing or using different polarization directions.

[0260] Wherein x represents the unmodulated signal of the first carrier, and subcarrier 1 and subcarrier 2 can also represent the first frequency subcarrier and the second frequency subcarrier respectively (for the modulated first carrier, the existing codebook can be used, and the transmission process remains unchanged, which will not be described here in the embodiments of the present application).

[0261] The following is described with an example.

[0262] The unmodulated bit information is transmitted through the first node's antennas 1 and 2, and the power is divided equally and is equal. For the first frequency subcarrier and the second frequency subcarrier (the first frequency subcarrier and the second frequency subcarrier can be adjacent or not adjacent), since the first carrier is an unmodulated carrier signal, the codebook of SFBC is shown in Table 8 (taking codebook 1 as an example):

[0263] Table 8

[0264] After the AIoT device receives the unmodulated first carrier, the AIoT device modulates the first carrier according to the first information. Assuming that the first information indicates BPSK modulation, the modulation information is B (for convenience, it is assumed that 1 bit of information is modulated. If it is bit 1, B = 1; if it is bit 0, B = -1). Further, assuming that the receiver receives signals through two antennas, corresponding to y1 and y2, the AIoT device modulates bit 1 information:

[0265] where h represents the channel state information estimated by the receiver. Ignoring channel noise, the information transmitted by the AIoT device can be decoded by the receiver algorithm, for example:

[0266] From the above formula, it can be found that the receiver obtains additional spatial diversity gain and frequency diversity gain.

[0267] In the embodiments of the present application, the waveform configuration of the first carrier includes a first waveform of the first carrier and a second waveform of the first carrier. The first waveform includes a single frequency for the first carrier, in other words, the first carrier is a single carrier. The second waveform includes two frequencies for the first carrier, in other words, the first carrier includes a first frequency subcarrier and a second frequency subcarrier.

[0268] S420, the AIoT device determines the backscattering signal of the first carrier according to the first carrier.

[0269] In the embodiments of the present application, the AIoT device receives the first carrier, and can determine the backscattering signal according to the first carrier. For the topology structure one and the topology structure three shown in FIG. 2, the AIoT device can send the backscattering signal to the first node. For the topology structure two and the topology structure four shown in FIG. 2, the AIoT device can send the backscattering signal to the third node.

[0270] Optionally, for the topology structure one and the topology structure two shown in FIG. 2, the communication method provided by the embodiments of the present application further includes: the first node determines whether to switch the waveform of the first carrier or whether to stop sending the first carrier according to a third condition and first capability information, the first capability information being used to indicate the radio frequency receiving bandwidth capability of the AIoT device.

[0271] The third condition includes one or more of the following:

[0272] The first node sends the first carrier in the first waveform, and does not receive the backscattering signal or does not correctly receive the backscattering signal within the configured time window, and then switches to the second waveform to send the first carrier.

[0273] The first node transmits the first carrier in the first waveform, and does not receive a backscattering signal or does not correctly receive the backscattering signal in a configured time window, and then the first node stops transmitting the first carrier.

[0274] The first node transmits the first carrier in the second waveform, and receives an interference measurement quantity reported by the AIoT device when receiving the backscattering signal, and the interference measurement quantity is greater than the fourth threshold value, and then the first node switches to transmitting the first carrier in the first waveform, and the frequency of the first waveform is located between intervals of the second waveform.

[0275] The first node transmits the first carrier in the second waveform, and receives an interference measurement quantity reported by the AIoT device when receiving the backscattering signal, and the interference measurement quantity is greater than the fourth threshold value, and then the first node does not transmit the first carrier.

[0276] The first node transmits the first carrier in the second waveform, and the first node receives D2R signal collision information of the AIoT device, and then switches to transmitting the first carrier in the second waveform.

[0277] The first node transmits the first carrier in the first waveform when the AIoT device is a first type of AIoT device, and transmits the first carrier in the first waveform or the second waveform when the AIoT device is a second type of AIoT device.

[0278] The first node transmits the first carrier in the first waveform or the second waveform when the AIoT device is a first type of AIoT device, and transmits the first carrier in the first waveform or the second waveform when the AIoT device is a second type of AIoT device.

[0279] The interference measurement quantity is as described in the above embodiments, the first type of AIoT device is a passive AIoT device, and the second type of AIoT device is a semi-passive AIoT device.

[0280] It should be noted that the fourth threshold value can be the same as the second threshold value or different from the second threshold value, and the embodiments of the present application do not limit this.

[0281] Optionally, for the topology structure three and the topology structure four shown in FIG. 2, the communication method provided by the embodiments of the present application further includes: the second node sends indication information to the first node. Correspondingly, the first node receives the indication information from the second node.

[0282] The indication information is used to instruct the first node to switch the waveform of the first carrier or stop transmitting the first carrier. For example, the indication information can be DCI 1_0 or a SIB message, and the embodiments of the present application do not limit this.

[0283] Optionally, the communication method provided by the embodiment of the present application further includes: the first node performs frequency hopping according to the frequency hopping configuration of the first carrier. It should be understood that the first node performs frequency hopping within the AIoT system bandwidth according to the frequency hopping configuration of the first carrier.

[0284] Optionally, the first node can also perform frequency hopping outside the AIoT system bandwidth, or frequency hop to a channel of the communication system.

[0285] Based on this, in a possible implementation, the communication method provided by the embodiment of the present application further includes: the first node frequency hops to a target channel to transmit the first carrier based on a fourth rule and the frequency hopping configuration of the first carrier. Correspondingly, the AIoT device receives the first carrier.

[0286] The target channel is a communication channel other than the first channel, or in other words, the target channel is a channel of the communication system. Optionally, for the topology structure one and the topology structure two shown in FIG. 2, the target channel can be determined by the first node. Optionally, for the topology structure three and the topology structure four shown in FIG. 2, the target channel can be indicated by the second node to the first node. Alternatively, optionally, the target channel can be indicated by other access network devices to the first node, which is not limited by the embodiment of the present application.

[0287] In the embodiment of the present application, the fourth rule is used to determine whether to frequency hop to the target channel. Optionally, the fourth rule can include one or more of the following: according to that the target channel is not occupied before frequency hopping, the target channel does not carry a communication signal after frequency hopping, it is determined to frequency hop to the target channel; according to that the target channel is idle before frequency hopping, the target channel conflicts with the frequency hopping within the first channel, it is determined not to frequency hop to the target channel; or, according to that the communication signal will occupy the target channel during the process of frequency hopping to the target channel, it is determined to exit the occupation of the target channel.

[0288] It should be noted that when a conflict occurs, the frequency hopping configuration of the first carrier can be reacquired or according to the configured frequency hopping configuration.

[0289] For example, for the case that the first carrier is a single frequency, switching from out-of-band frequency hopping to in-band frequency hopping.

[0290] For example, for the case that the first carrier includes a first frequency subcarrier and a second frequency subcarrier, switching from out-of-band frequency hopping to in-band frequency hopping, and ensuring that the frequency hopping frequency offset values corresponding to the first frequency and the second frequency in the same time unit after frequency hopping cannot be less than the interval value.

[0291] For example, the frequency offset value of the first carrier frequency hopping is the frequency offset value of the occupied bandwidth and the idle bandwidth.

[0292] Alternatively, in another possible implementation, the first node frequency-hops to the target channel when the first condition and the second condition are satisfied.

[0293] The target channel is a communication channel other than the first channel, and the first channel is used to carry the first carrier. The first condition is that an idle duration of the target channel is greater than or equal to a first duration. The second condition is that total power of the target channel is less than or equal to a third threshold.

[0294] For the first condition, the first duration can be configured by high-layer signaling. The first duration in different time units can be the same or different. For example, as shown in FIG. 15, the frequency-hopping manner is inter-time-unit frequency-hopping. The first duration of time unit 2 is half of the length of time unit 2, and the first duration of time unit 4 is 1 / 4 of the length of time unit 4.

[0295] For the second condition, the third threshold can be configured by high-layer signaling. The third threshold in different time units can be the same or different. The third threshold can include one or more of the following: RSRP, RSSI, or RSRQ. For example, if the power of the target channel is greater than the third threshold, the target channel is occupied, otherwise, the target channel is idle.

[0296] In a possible implementation, in the process of monitoring the target channel, the first signal can be used to transmit the first carrier, or in other words, in the process of monitoring the target channel, the first carrier can be transmitted in the AIoT system band.

[0297] In the embodiments of the present application, the first capability information can also be used by the first node to determine the transmission occasion of the first carrier. FIG. 16 shows an example of determining the transmission occasion of the first carrier based on the first capability information. As shown in FIG. 16, the longest time of transceiver switching is T1, the silence time is T2, T represents the time offset value between the end time of the R2D signal transmission and the start time of the first carrier transmission, T >= (T1+T2). The R2D signal and the first carrier can be transmitted in the same frequency unit or in different frequency units. The frequency unit refers to RE, RB or a newly defined frequency unit, which is not limited in the embodiments of the present application.

[0298] FIG. 17 shows another example of determining the transmission occasion of the first carrier based on the first capability information. As shown in FIG. 17, the first node can determine the duration of the transmission resource release based on the first capability information, which is used for the use of the NR system, to improve the resource utilization. The first node transmits the R2D signal (with a duration of T3) in the frequency unit M and transmits the first carrier in the frequency unit N (N≠M), and the first carrier and the R2D signal are transmitted simultaneously. The first node releases the transmission resource of the first carrier within the time period T (T=T1+T2+T3) according to the first capability information and the transmission time of the R2D signal, which saves the energy of the first node and improves the resource utilization.

[0299] The communication method provided by the embodiments of the present application is that the first node transmits the first carrier to the AIoT device based on the configuration information of the first carrier, and correspondingly, the AIoT device receives the first carrier and determines the backscattering signal of the first carrier according to the first carrier. In this process, since the first carrier is transmitted based on the configuration of the first carrier, a method for configuring and transmitting the first carrier is provided.

[0300] It should be noted that, in order to solve the interference problem of AIoT R2D signal transmission in a multipath environment, a CP needs to be added when the R2D signal is generated. The first node transmits the R2D signal and adds the CP according to the sixth rule, which includes any one of the following:

[0301] For the case where the length of the CP is greater than the length of the chip:

[0302] When the level of the CP is consistent with the level of the first chip or the last chip in the OFDM symbol, a time domain gap is added before or after the CP.

[0303] When the level of the CP is inconsistent with the level of the first chip or the last chip in the OFDM symbol, a time domain gap is added before and after the CP.

[0304] The length of the gap is determined by the SFO / CFO.

[0305] For the case where the length of the CP is less than the length of the chip:

[0306] When the level of the CP is consistent with the level of the first chip or the last chip in the OFDM symbol, a time domain gap is added before or after the CP

[0307] The length of the gap is determined by the SFO / CFO.

[0308] One implementation is to add a time domain gap after the CP or after the CP and each chip to eliminate the impact of SFO. As shown in FIG. 18, if a gap is not added after the CP, and the CP length < chip length in FIG. 18, it is likely to misjudge the CP as one CP because the Manchester coding can have two adjacent chips being the same level. If a gap is added after the CP, the situation of misjudging a chip caused by SFO can be avoided. The gap is very small, less than the CP and chip length, and only related to SFO.

[0309] FIG. 19 is a schematic diagram of a communication apparatus provided in an embodiment of the present application. The communication apparatus can be any of the devices or network elements in any of the method embodiments, or an apparatus including any of the devices or network elements, or a component usable for any of the devices or network elements. It can be understood that, in order to implement the above functions, the communication apparatus includes corresponding hardware structure and / or software module for performing each function. Those skilled in the art can easily realize that, in combination with the embodiments disclosed in the present application, the units and algorithm steps of each example can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0310] The communication apparatus includes a transceiver module 1910 and a processing module 1920. The transceiver module 1910, which can also be referred to as a transceiver unit, is configured to implement a transceiving function, for example, a transceiving circuit, a transceiver, a transceiver, or a communication interface.

[0311] The above method embodiments involve all relevant content of each step, which can be referred to the function description of the corresponding function module, and will not be repeated here. Optionally, the communication apparatus can further include a storage module 1930, which can be used to store instructions or and / or data, and the processing module 1920 can read the instructions or and / or data in the storage module 1930.

[0312] In the embodiments of the present application, the first communication node is presented in the form of dividing each function module in an integrated manner. The "module" here can refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art can think that the communication apparatus can take the form of the communication apparatus 300 shown in FIG. 3.

[0313] For example, the processor 201 in the communication apparatus 300 shown in FIG. 3 can invoke the computer-executed instructions stored in the memory 303 to cause the communication apparatus 300 to perform the communication method in the above method embodiments.

[0314] Specifically, the functions / implementation procedures of the transceiver module 1910 and the processing module 1920 in FIG. 19 can be implemented by the processor 301 in the communication apparatus 300 shown in FIG. 3 invoking the computer-executed instructions stored in the memory 303. Alternatively, the functions / implementation procedures of the processing module 1920 in FIG. 19 can be implemented by the processor 301 in the communication apparatus 300 shown in FIG. 3 invoking the computer-executed instructions stored in the memory 303, and the functions / implementation procedures of the transceiver module 1910 in FIG. 19 can be implemented by the communication interface 304 in the communication apparatus 300 shown in FIG. 3.

[0315] It should be understood that one or more of the above modules or units can be implemented in software, hardware, or a combination of both. When any of the above modules or units is implemented in software, the software exists in the form of computer program instructions, and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method procedures. The processor can be built in a SoC (System on Chip) or an ASIC, or be a separate semiconductor chip. The processor further includes a core for executing software instructions to perform operations or processing, and can further include necessary hardware accelerators, such as a field programmable gate array (FPGA), a PLD (programmable logic device), or a logic circuit for implementing special logic operations.

[0316] When any of the above modules or units is implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, a FPGA, a PLD, a dedicated digital circuit, a hardware accelerator, or a non-integrated discrete device, which can run necessary software or be independent of software to perform the above method procedures.

[0317] Optionally, the embodiments of the present application further provide a communication apparatus (for example, the communication apparatus can be a chip or a chip system), which comprises a processor, and the processor is configured to implement the method in any of the method embodiments. In a possible design, the communication apparatus further comprises a memory. The memory is configured to store necessary program instructions and data, and the processor can invoke the program instructions stored in the memory to instruct the communication apparatus to perform the method in any of the method embodiments. Of course, the memory can also not be in the communication apparatus. When the communication apparatus is a chip system, the communication apparatus can be composed of a chip, or can comprise a chip and other discrete devices, and the embodiments of the present application do not make a specific limitation in this regard.

[0318] Optionally, the embodiments of the present application further provide a computer readable storage medium, which stores a computer program or instructions, and when the computer program or instructions are executed on a communication apparatus, the communication apparatus can perform the method in any of the method embodiments or any implementation manner thereof.

[0319] Optionally, the embodiments of the present application further provide a communication system, which comprises the communication apparatus in the method embodiments.

[0320] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or data storage device such as one or more servers, data centers, etc. integrated with one or more media. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, DVD) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0321] Although the application has been described in connection with the embodiments thereof with reference to the various drawings, it will be understood that other variations and modifications of the details, and specific embodiments disclosed can be effected without departing from the application. In its broadest form, the application comprises the combinations of features of the application as described hereinabove. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single processor or other unit can fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0322] Although the application has been described in connection with specific embodiments thereof, it will be understood that it is capable of further modifications and this application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. Accordingly, the description and drawings are to be regarded as illustrative in nature and not as restrictive.

Claims

1. A communication method characterized by comprising: comprising: sending, to an ambient Internet of Things, AIoT, device, a first carrier based on a configuration of the first carrier, the configuration of the first carrier comprising one or more of: a power configuration of the first carrier, a carrier spacing configuration of the first carrier, a guard band configuration of the AIoT system, a frequency hopping configuration of the first carrier, a codebook configuration of the first carrier, or a waveform configuration of the first carrier; wherein the first carrier is used to carry modulation information of the AIoT device in the AIoT system.

2. The method of claim 1, wherein: the power configuration of the first carrier comprises a power threshold of a first channel, the first channel being used to carry the first carrier.

3. The method of claim 2, wherein, the power threshold of the first channel is determined according to a first relationship, the first relationship being that a ratio of a total interference power of the first channel to a second channel to a total power of the first channel is less than an absolute value of a first difference, the first difference being a difference between a power threshold of the second channel and the power threshold of the first channel, the second channel being a channel adjacent to or separated from the first channel.

4. The method of claim 3, wherein, the AIoT system comprises a number of nodes sending the first carrier less than or equal to a first threshold, a bandwidth of the first channel being the same as a bandwidth of the second channel.

5. The method of claim 3, wherein, the AIoT system comprises a number of nodes sending the first carrier greater than the first threshold, the bandwidth of the first channel being different from the bandwidth of the second channel.

6. The method of claim 5, wherein, the power configuration of the first carrier further comprises a bandwidth of the first channel.

7. The method of claim 5, wherein, the bandwidth of the first channel is determined based on a first rule; the first rule comprises one or more of: the bandwidth of the first channel is an integer multiple or a fractional multiple of a bandwidth corresponding to a preamble or a start indication; the bandwidth of the first channel is an integer multiple or a fractional multiple of a bandwidth corresponding to reader-to-AIoT device, R2D, control information; the bandwidth of the first channel is an integer multiple or a fractional multiple of a bandwidth corresponding to a time unit of a communication system; or the bandwidth of the first channel is an integer multiple or a fractional multiple of a subcarrier spacing, SCS.

8. The method of claim 1, wherein, the first carrier comprises a first frequency subcarrier and a second frequency subcarrier, the carrier spacing configuration of the first carrier comprising a spacing between the first frequency and the second frequency, the spacing satisfying at least one constraint condition: a first constraint condition, a second constraint condition, a third constraint condition, or a fourth constraint condition; the first constraint condition is that the spacing is greater than or equal to a frequency offset of a backscattering signal of the AIoT device; the second constraint condition is that an interference measurement is greater than a second threshold, the interference measurement being a measurement of interference of the AIoT system on a coexistence system, the coexistence system comprising the AIoT system and a communication system; the third constraint condition is that the spacing is less than or equal to a transmission bandwidth of the AIoT system; the fourth constraint condition is that a coherence bandwidth satisfies any one of: the transmission bandwidth of the AIoT system is greater than the coherence bandwidth; the spacing is greater than the coherence bandwidth; The interval is greater than a second difference value, the second difference value being a difference between the coherence bandwidth and a first sum value, the first sum value being a sum of twice a bandwidth of the BLF and twice a guard band bandwidth of the AIoT system; wherein the coherence bandwidth is obtained by channel measurement.

9. The method of claim 8, wherein, The interference measurement quantity comprises one or more of: a reference signal received power (RSRP), a reference signal received quality (RSRQ), or a received signal strength indicator (RSSI).

10. The method of claim 1, wherein, The guard band configuration of the AIoT system comprises a guard band bandwidth of the AIoT system, a left half of the guard band bandwidth of the AIoT system bandwidth being equal to a right half of the guard band bandwidth of the AIoT system bandwidth; The guard band bandwidth of the AIoT system is related to one or more of: a maximum interval of a carrier corresponding to the AIoT system, the carrier comprising a plurality of frequencies, the maximum interval of the carrier being an interval between a minimum frequency and a maximum frequency of the plurality of frequencies comprised by the carrier; a transmission bandwidth of the AIoT system; a transmission bandwidth of a communication system and a guard band bandwidth of the communication system; a subcarrier interval of a coexistence system, the coexistence system comprising the AIoT system and the communication system. The transmission bandwidth of the communication system comprises the guard band bandwidth of the AIoT system. The guard band bandwidth of the AIoT system is related to one or more of: a channel bandwidth of the AIoT system, a number of RBs, a sampling frequency offset of the AIoT device, or a scaling factor. The guard band bandwidth of the communication system comprises the transmission bandwidth of the AIoT system and the guard band bandwidth of the AIoT system. The guard band bandwidth of the AIoT system is related to one or more of: a guard band transmission bandwidth of the communication system, a number of RBs, or a sampling frequency offset of the AIoT device.

11. The method of claim 10, wherein, The frequency offset value is determined based on a second rule, the second rule comprising one or more of:

12. The method of claim 11, wherein, The frequency offset value is less than or equal to a bandwidth of a first channel, the first channel being used to carry the first carrier, wherein a frequency of the first carrier is a single frequency, and the frequency offset value is a frequency offset value of frequency hopping of the first carrier in a same time unit; 13. The method of claim 10, wherein, The frequency offset value is greater than or equal to an interval between a first frequency and a second frequency, wherein the frequency of the first carrier comprises the first frequency and the second frequency, and the frequency offset value is a frequency offset value of frequency hopping of the first frequency and the second frequency in a same time unit; 14. The method of claim 13, wherein, Or, the frequency offset value is determined based on a backscattering signal frequency of the AIoT device.

15. The method of claim 1, wherein, The frequency hopping manner of the first carrier comprises one or more of:

16. The method of claim 15, wherein, Frequency hopping in a time unit; Or, frequency hopping between time units. ​ ​ 17. The method according to claim 15 or 16, characterized in that, ​ ​ ​ 18. The method of claim 17, wherein, The intra-time-unit frequency hopping comprises one or more of the following: frequency hopping once within the time unit, frequency hopping multiple times within the time unit with the same frequency offset value, or frequency hopping multiple times within the time unit with different frequency offset values. The time unit comprises one or more of the following: a frame, a subframe, a slot, or a symbol.

19. The method of claim 17 or 18, wherein, The inter-time-unit frequency hopping comprises one or more of the following: frequency hopping multiple times between any two adjacent time units with the same frequency offset value, frequency hopping multiple times between any two adjacent time units with different frequency offset values, frequency hopping between any two time units separated by multiple time units with the same frequency offset value, or frequency hopping between any two time units separated by multiple time units with different frequency offset values. The time unit comprises one or more of the following: a frame, a subframe, a slot, a symbol, or a chip.

20. The method of any one of claims 15-19, wherein, The starting RB position of the first carrier frequency hopping is determined based on a third rule, and the third rule comprises one or more of the following: The starting RB position of the first carrier frequency hopping is included in a transmission resource message of the first carrier indicated by a high-layer parameter. The starting RB position of the first carrier frequency hopping is a predefined position corresponding to a predefined transmission resource of the first carrier. The starting RB position of the first carrier frequency hopping in the current time unit is indicated by indication information.

21. The method of any one of claims 15-19, wherein, The method further comprises: Frequency hopping according to the frequency hopping configuration of the first carrier.

22. The method of any one of claims 15-21, wherein, The method further comprises: Frequency hopping to a target channel based on a fourth rule and the frequency hopping configuration of the first carrier, the target channel being a communication channel other than the first channel, the first channel being used to carry the first carrier, and the fourth rule being used to determine whether to frequency hop to the target channel.

23. The method of claim 22, wherein, The fourth rule comprises one or more of the following: Frequency hopping to the target channel according to whether the target channel is unoccupied before frequency hopping and whether the target channel does not carry a communication signal after frequency hopping; Frequency hopping to the target channel according to whether the target channel is idle before frequency hopping and whether the target channel conflicts with frequency hopping in the first channel; Or, exiting occupation of the target channel according to whether the communication signal will occupy the target channel during the process of frequency hopping to the target channel. The method further comprises:

24. The method of any one of claims 15-21, wherein, Frequency hopping to a target channel when a first condition and a second condition are met, the target channel being a communication channel other than the first channel, and the first channel being used to carry the first carrier; The first condition is that the idle duration of the target channel is greater than or equal to a first duration; The second condition is that the total power of the target channel is less than or equal to a third threshold. The listening to the target channel comprises:

25. The method of claim 24, wherein, During the process of listening to the target channel, the first channel is used to transmit the first carrier. The waveform configuration of the first carrier comprises a first waveform of the first carrier and a second waveform of the first carrier, the first waveform comprising a single frequency of the first carrier, and the second waveform comprising a first frequency subcarrier and a second frequency subcarrier of the first carrier.

26. The method of claim 1, wherein, The method further comprises:

27. The method of claim 26, wherein, ​ According to the third condition and the first capability information, it is determined whether to switch the waveform of the first carrier or to stop transmitting the first carrier, and the first capability information is used to indicate the radio frequency receiving bandwidth capability of the AIoT device.

28. The method of claim 27, wherein, The third condition includes one or more of the following: The first node transmits the first carrier in the first waveform, and if no backscatter signal is received or no backscatter signal is correctly received within a configured time window, the first node switches to transmitting the first carrier in the second waveform; The first node transmits the first carrier in the first waveform, and if no backscatter signal is received or no backscatter signal is correctly received within a configured time window, the first node stops transmitting the first carrier; The first node transmits the first carrier in the second waveform, and when receiving a backscatter signal, the first node receives an interference measurement quantity reported by the AIoT device, and the interference measurement quantity is greater than a fourth threshold value, the first node switches to transmitting the first carrier in the first waveform, and the frequency of the first waveform is located between the intervals of the second waveform; The first node transmits the first carrier in the second waveform, and when receiving a backscatter signal, the first node receives an interference measurement quantity reported by the AIoT device, and the interference measurement quantity is greater than the fourth threshold value, the first node does not transmit the first carrier; The first node transmits the first carrier in the second waveform, and the first node receives D2R signal collision information of the AIoT device, and then switches to transmitting the first carrier in the second waveform; When the AIoT device is a first type of AIoT device, the first node transmits the first carrier in the first waveform, and when the AIoT device is a second type of AIoT device, the first node transmits the first carrier in the first waveform or the second waveform; When the AIoT device is the first type of AIoT device, the first node transmits the first carrier in the first waveform or the second waveform, and when the AIoT device is the second type of AIoT device, the first node transmits the first carrier in the first waveform or the second waveform. The interference measurement quantity is a measurement quantity of interference of the AIoT system on a coexistence system, and the coexistence system includes the AIoT system and a communication system; the first type of AIoT device is a passive AIoT device, and the second type of AIoT device is a semi-passive AIoT device.

29. The method of claim 1, wherein, The codebook configuration of the first carrier includes codebook information of a space-frequency coding (SFBC) mechanism of the first carrier, and the codebook information of the SFBC mechanism of the first carrier is used for the first node to map symbols of the first carrier to antenna ports based on a fifth rule; The fifth rule is that when the symbols of the first carrier including a first frequency and a second frequency are mapped to frequency domain resources outside the transmission bandwidth of the AIoT system, the frequency domain resources of the first carrier are configured by a high-level parameter.

30. The method of claim 29, wherein, The rule for mapping the symbols of the first carrier to the antenna ports includes: The symbol of the first frequency subcarrier is mapped to the first antenna port, and the symbol of the second frequency subcarrier is mapped to the second antenna port; or, the symbol of the first frequency subcarrier is mapped to the second antenna port, and the symbol of the second frequency subcarrier is mapped to the first antenna port.

31. The method of claim 29, wherein, The codebook information of the SFBC mechanism is related to one or more of the following: The unmodulated signal corresponding to the first carrier, the first frequency, or the second frequency.

32. The method of any one of claims 1 to 31, wherein, The method further comprises: receiving first capability information from the AIoT device, the first capability information being used to indicate the radio frequency receiving bandwidth capability of the AIoT device; determining the configuration of the first carrier according to the first capability information; the first carrier is sent based on the configuration of the first carrier, including: the first carrier is sent according to the configuration of the first carrier.

33. The method of claim 32, wherein, The method further comprises: sending first information to the AIoT device, the first information being used to indicate the resource of the AIoT device for sending the backscatter signal of the first carrier; receiving the backscatter signal of the first carrier from the terminal.

34. The method of claim 32, wherein, The method further comprises: sending one or more of the following to the third node: the first information, the configuration information of the first carrier, the first information being used to indicate the resource of the AIoT device for sending the backscatter signal of the first carrier.

35. The method of any one of claims 1 to 31, wherein, The method further comprises: sending second capability information to the second node, the second capability information being the capability information of the first node; receiving the configuration information of the first carrier from the second node, the configuration information of the first carrier being determined by the second node according to the second capability information; the first carrier is sent based on the configuration information of the first carrier, including: the first carrier is sent according to the configuration information of the first carrier.

36. The method of claim 35, wherein, The method further comprises: receiving first information from the second node, the first information being used to indicate the resource of the AIoT device for sending the backscatter signal of the first carrier; sending the first information to the AIoT device; receiving the backscatter signal of the first carrier from the AIoT device.

37. The method of claim 35, wherein, The method further comprises: sending one or more of the following to the third node: the first information, the configuration information of the first carrier, the first information being used to indicate the resource of the AIoT device for sending the backscatter signal of the first carrier.

38. The method of any one of claims 32-37, wherein, The first capability information includes one or more of the following: the longest event of the AIoT device transceiving switching, the maximum sampling rate of the AIoT device, the maximum energy storage capacitor of the AIoT device, the silence time of the AIoT device receiving the reader-to-AIoT device R2D signal, or, the opportunity of the AIoT device transmitting the backscatter signal.

39. The method of any one of claims 35-38, wherein, The second capability information includes one or more of the following: the frequency hopping capability of the first node, the number of transmit antennas of the first node, or, the maximum transmit power of the first node.

40. A method of communication, comprising: Applied to AIoT devices, including: receive a first carrier from a first node, the first carrier being transmitted by the first node based on a configuration of the first carrier, the configuration of the first carrier comprising one or more of: a power configuration of the first carrier, a carrier spacing configuration of the first carrier, a guard band configuration of the AIoT system, a frequency hopping configuration of the first carrier, a codebook configuration of the first carrier, or a waveform configuration of the first carrier; wherein the first carrier is configured to carry modulation information of the AIoT device in the AIoT system; determine a backscattering signal of the first carrier based on the first carrier.

41. The method of claim 1, wherein: the power configuration of the first carrier comprises a power threshold of a first channel, the first channel being configured to carry the first carrier.

42. The method of claim 41, wherein, the power threshold of the first channel is determined according to a first relationship, the first relationship being that a ratio of a total interference power of the first channel to a total power of the first channel to a second channel is less than an absolute value of a first difference, the first difference being a difference between a power threshold of the second channel and the power threshold of the first channel, the second channel being a channel adjacent to or separated from the first channel.

43. The method of claim 42, wherein, the AIoT system comprises a number of nodes transmitting the first carrier less than or equal to a first threshold, a bandwidth of the first channel being the same as a bandwidth of the second channel.

44. The method of claim 42, wherein, the AIoT system comprises a number of nodes transmitting the first carrier greater than the first threshold, the bandwidth of the first channel being different from the bandwidth of the second channel.

45. The method of claim 44, wherein, the power configuration of the first carrier further comprises a bandwidth of the first channel.

46. The method of claim 44, wherein, the bandwidth of the first channel is determined based on a first rule; the first rule comprises one or more of: the bandwidth of the first channel is an integer or fractional multiple of a bandwidth corresponding to a preamble or a start indication; the bandwidth of the first channel is an integer or fractional multiple of a bandwidth corresponding to reader-to-AIoT device (R2D) control information; the bandwidth of the first channel is an integer or fractional multiple of a bandwidth corresponding to a time unit of a communication system; or the bandwidth of the first channel is an integer or fractional multiple of a subcarrier spacing (SCS).

47. The method of claim 40, wherein, the first carrier comprises a first frequency subcarrier and a second frequency subcarrier, the carrier spacing configuration of the first carrier comprising a spacing between the first frequency and the second frequency, the spacing satisfying at least one constraint condition: a first constraint condition, a second constraint condition, a third constraint condition, or a fourth constraint condition; the first constraint condition is that the spacing is greater than or equal to a frequency offset of a backscattering signal of the AIoT device; the second constraint condition is that an interference measurement is greater than a second threshold, the interference measurement being a measurement of interference of the AIoT system on a coexistence system, the coexistence system comprising the AIoT system and a communication system; the third constraint condition is that the spacing is less than or equal to a transmission bandwidth of the AIoT system; the fourth constraint condition is that a coherence bandwidth satisfies any one of: the transmission bandwidth of the AIoT system is greater than the coherence bandwidth; The interval is greater than the coherence bandwidth. The interval is greater than a second difference value, and the second difference value is a difference between the coherence bandwidth and a first sum value, and the first sum value is a sum of twice a bandwidth of the AIoT system and twice a guard band bandwidth of the AIoT system; wherein the coherence bandwidth is obtained by channel measurement.

48. The method of claim 47, wherein, The interference measurement quantity comprises one or more of the following: a reference signal received power (RSRP), a reference signal received quality (RSRQ), or a received signal strength (RSSI).

49. The method of claim 40, wherein, The guard band configuration of the AIoT system comprises a guard band bandwidth of the AIoT system, and a left half of the guard band bandwidth of the AIoT system bandwidth is equal to a right half of the guard band bandwidth of the AIoT system bandwidth. The guard band bandwidth of the AIoT system is related to one or more of the following: A maximum interval of a carrier corresponding to the AIoT system, the carrier comprising a plurality of frequencies, and the maximum interval of the carrier being an interval between a minimum frequency and a maximum frequency of the plurality of frequencies comprised by the carrier; A transmission bandwidth of the AIoT system; A transmission bandwidth of a communication system and a guard band bandwidth of the communication system; A subcarrier interval of a coexistence system, the coexistence system comprising the AIoT system and the communication system.

50. The method of claim 49, wherein, The transmission bandwidth of the communication system comprises the guard band bandwidth of the AIoT system.

51. The method of claim 50, wherein, The guard band bandwidth of the AIoT system is related to one or more of the following: a channel bandwidth of the AIoT system, a number of RBs, a sampling frequency offset of the AIoT device, or a scaling factor.

52. The method of claim 49, wherein, The guard band bandwidth of the communication system comprises the transmission bandwidth of the AIoT system and the guard band bandwidth of the AIoT system.

53. The method of claim 52, wherein, The guard band bandwidth of the AIoT system is related to one or more of the following: a guard band transmission bandwidth of the communication system, a number of RBs, or a sampling frequency offset of the AIoT device.

54. The method of claim 40, wherein, The frequency offset value is determined based on a second rule, and the second rule comprises one or more of the following:

55. The method of claim 54, wherein, The frequency offset value is less than or equal to a bandwidth of a first channel used to carry the first carrier, wherein the frequency of the first carrier is a single frequency, and the frequency offset value is a frequency offset value of the first carrier hopping within an adjacent time unit; The frequency offset value is greater than or equal to an interval between a first frequency and a second frequency, wherein the frequency of the first carrier comprises the first frequency and the second frequency, and the frequency offset value is a frequency offset value of the first frequency and the second frequency hopping within a same time unit; Or, the frequency offset value is determined based on a backscattering signal frequency of the AIoT device. The frequency hopping manner of the first carrier comprises one or more of the following:

56. The method of claim 54 or 55, wherein, Hopping within a time unit; Or, hopping between time units. ​ 57. The method of claim 56, wherein, The intra-time-unit frequency hopping comprises one or more of the following: hopping multiple times with the same frequency offset value within the time unit, or hopping multiple times with different frequency offset values within the time unit. The time unit comprises one or more of the following: a frame, a subframe, a slot, or a symbol.

58. The method of claim 56 or 57, wherein, The inter-time-unit frequency hopping comprises one or more of the following: hopping multiple times with the same frequency offset value between any two adjacent time units, hopping multiple times with different frequency offset values between any two adjacent time units, hopping with the same frequency offset value between any two time units separated by multiple time units, or hopping with different frequency offset values between any two time units separated by multiple time units. The time unit comprises one or more of the following: a frame, a subframe, a slot, a symbol, or a chip.

59. The method of any one of claims 54-58, wherein, The starting RB position of the first carrier frequency hopping is determined based on a third rule, which comprises one or more of the following: The starting RB position of the first carrier frequency hopping is included in a transmission resource message of the first carrier indicated by a high-layer parameter; The starting RB position of the first carrier frequency hopping is a predefined position corresponding to the transmission resource of the first carrier; The starting RB position of the first carrier frequency hopping in the current time unit is indicated by indication information.

60. The method of any one of claims 54-59, wherein, The method further comprises: receiving the first carrier frequency hopping.

61. The method of any one of claims 54-60, wherein, The method further comprises: receiving the first carrier frequency hopping on a target channel, wherein the first carrier frequency hopping is transmitted by the first node based on a fourth rule and the frequency hopping configuration of the first carrier, and the target channel is a communication channel other than the first channel, and the first channel is used to carry the first carrier, and the fourth rule is used to determine whether to hop to the target channel.

62. The method of claim 61, wherein, The fourth rule comprises one or more of the following: determining to hop to the target channel according to that the target channel is not occupied before frequency hopping, and the target channel does not carry a communication signal after frequency hopping; determining not to hop to the target channel according to that the target channel is idle before frequency hopping, and the target channel conflicts with frequency hopping in the first channel; or, determining to exit occupying the target channel according to that the communication signal will occupy the target channel during the process of hopping to the target channel.

63. The method of any one of claims 54-58, wherein, The method further comprises: receiving the first carrier frequency hopping on a target channel, wherein the first carrier frequency hopping is transmitted when a first condition and a second condition are met by listening to the target channel, the target channel is a communication channel other than the first channel, and the first channel is used to carry the first carrier; The first condition is that the idle duration of the target channel is greater than or equal to a first duration; The second condition is that the total power of the target channel is less than or equal to a third threshold.

64. The method of claim 63, wherein, The listening to the target channel comprises: during the process of listening to the target channel, the first channel is used to transmit the first carrier.

65. The method of claim 40, wherein, The waveform configuration of the first carrier includes a first waveform of the first carrier and a second waveform of the first carrier, the first waveform includes a single frequency for the first carrier, and the second waveform includes a first frequency subcarrier and a second frequency subcarrier for the first carrier.

66. The method of claim 40, wherein, The codebook configuration of the first carrier includes codebook information of a space frequency block coding (SFBC) mechanism of the first carrier, and the codebook information of the SFBC mechanism of the first carrier is used for the first node to map a symbol of the first carrier to an antenna port based on a fifth rule. The fifth rule is that when the symbol of the first carrier including the first frequency and the second frequency is mapped to a frequency domain resource outside a transmission bandwidth of the AIoT system, a frequency domain resource of the first carrier is configured by a higher layer parameter.

67. The method of claim 66, wherein, The rule of mapping the symbol of the first carrier to the antenna port includes: The symbol of the first frequency subcarrier is mapped to a first antenna port, and the symbol of the second frequency subcarrier is mapped to a second antenna port; or the symbol of the first frequency subcarrier is mapped to the second antenna port, and the symbol of the second frequency subcarrier is mapped to the first antenna port.

68. The method of claim 66 or 67, wherein, The codebook information of the SFBC mechanism is related to one or more of the following: An unmodulated signal corresponding to the first carrier, the first frequency, or the second frequency.

69. The method of any one of claims 40-68, wherein, The method further includes: sending first capability information to the first node, the first capability information being used to indicate a radio frequency receiving bandwidth capability of the AIoT device.

70. A communications device, characterized by The communication apparatus includes a module for performing the method according to any one of claims 1 to 39, or a module for performing the method according to any one of claims 40 to 69.

71. A communications device, characterized by The communication apparatus includes a processor; the processor is configured to perform the method according to any one of claims 1 to 39, or to cause the communication apparatus to perform the method according to any one of claims 40 to 69.

72. A computer-readable storage medium, comprising, The computer readable storage medium includes instructions that, when executed, cause the method according to any one of claims 1 to 39 to be implemented, or cause the method according to any one of claims 40 to 69 to be implemented.

73. A computer program product, characterized in that, The computer program product includes instructions that, when executed, cause the method according to any one of claims 1 to 39 to be implemented, or cause the method according to any one of claims 40 to 69 to be implemented.

74. A communication system, characterized by The communication system includes the communication apparatus as claimed in claim 70 and the communication apparatus as claimed in claim 71.

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