Communication method and communication apparatus

Abstract

A communication method and a communication apparatus, which belong to the technical field of wireless communications. The communication method is applied to a reader / writer side, and comprises: sending first information to an intermediate node, such that the intermediate node sends an energy storage signal and / or a carrier signal to an ambient Internet-of-Things (AIoT) terminal on the basis of the first information.

Description

Communication method and communication apparatus TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and in particular 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 battery devices or only have low power storage capacity (for example, a capacitor), without the need for manual battery replacement or charging.

[0003] The 3rd Generation Partnership Project (3GPP) is studying the energy storage model of AIoT devices, but there are still many problems to be discussed and solved for the energy storage mechanism of AIoT, so as to make it more perfect.

[0004] SUMMARY

[0005] Embodiments of the present application provide a communication method and a communication apparatus to solve the problem of low reliability of passive IoT devices caused by battery-free.

[0006] To achieve the above object, the present application adopts the following technical scheme:

[0007] The first aspect of the present application provides a communication method applied to a reader-writer, comprising: sending first information to a middle node, so that the middle node sends an energy storage signal and / or a carrier signal to an ambient IoT (AIoT) terminal according to the first information.

[0008] The second aspect of the present application provides a communication method applied to a middle node, comprising: receiving first information sent by a reader-writer; based on the first information, sending an energy storage signal and / or a carrier signal to an AIoT terminal.

[0009] The third aspect of the present application provides a communication method applied to an AIoT terminal, comprising: sending capability information to a reader-writer and / or a middle node; receiving an energy storage signal / carrier signal sent by a middle node.

[0010] The fourth aspect of the present application provides a communication device, comprising: 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 execute the method of any one of the above aspects, process and / or generate output information according to the input information. The communication device can be the device of any one of the above aspects, or a device included in the device, such as a chip.

[0011] The fifth aspect of the present application provides a communication system, comprising: a device configured to execute the method of any one of the above aspects.

[0012] The sixth aspect of the embodiment of the present application further provides a wireless communication device, comprising: a processor and a memory, the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to execute the method of any one of the above aspects.

[0013] The seventh aspect of the embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium comprises instructions, when the instructions are executed, the method of any one of the above aspects is implemented. BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1a is a schematic diagram of a possible backscatter communication principle;

[0015] FIG. 1b is a topological structure diagram of an AIoT system;

[0016] FIG. 1c is a possible random access flowchart;

[0017] FIG. 2a is a flowchart of a possible communication method provided by the embodiment of the present application;

[0018] FIG. 2b is a flowchart of another possible communication method provided by the embodiment of the present application;

[0019] FIG. 2c is a possible signal time-frequency resource diagram provided by the embodiment of the present application;

[0020] FIG. 2d is another possible signal time-frequency resource diagram provided by the embodiment of the present application;

[0021] FIG. 2e is a possible terminal state switching diagram provided by the embodiment of the present application;

[0022] FIG. 3 is another possible communication method flowchart provided by the embodiment of the present application;

[0023] FIG. 4a is another possible signal time-frequency resource diagram provided by the embodiment of the present application;

[0024] FIG. 4b is another possible signal time-frequency resource diagram provided by the embodiment of the present application;

[0025] FIG. 4c is a flow chart of another possible communication method according to an embodiment of the present application;

[0026] FIG. 5a is a level diagram according to an embodiment of the present application;

[0027] FIG. 5b is another level diagram according to an embodiment of the present application;

[0028] FIG. 5c is another level diagram according to an embodiment of the present application;

[0029] FIG. 6a is a structure diagram of a communication device according to an embodiment of the present application;

[0030] FIG. 6b is a storage diagram of a possible wireless communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] For the convenience of understanding, the related art will be described first.

[0032] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0033] It should be understood that the term "and / or" in the present application is only used to describe the associated relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects. It should be noted that the naming of each parameter in the present application is used for convenience of description, and other naming can be used in practice, and the present application does not limit the specific naming.

[0034] The messages described in the present application include frames, instructions, commands, etc., and the naming of devices or functional entities, process names, frames, fields, etc. is not unique, which is only auxiliary to the description of functions, methods, behaviors, information, etc.

[0035] For the convenience of understanding, the related art will be described first.

[0036] Figure 1a is a schematic diagram of the principle of backscatter communication. Unlike the signal modulation and transmission process in traditional communication, the device supporting backscatter communication does not have the ability to generate a carrier wave and cannot "actively" send signals to the outside. Instead, the device modulates the information bits it needs to send on a third-party signal. The backscatter device selects the corresponding load impedance according to the information bits it needs to send, thereby changing the physical properties of the third-party signal, such as amplitude, phase, or frequency, to achieve "passive" communication. The above-mentioned backscatter communication principle mainly involves the sending end. A typical backscatter device, in addition to including channel coding and modulation modules designed for the sending end, usually also includes an antenna, a microcontroller, a signal receiving module, a memory, etc. Among them, the signal receiving module is responsible for receiving the downlink signal sent by the network side or the card reader to the backscatter device, and its architecture and technology can reuse the LP-WUR technology currently being developed by 3GPP. Since backscatter communication does not generate a carrier signal, its energy consumption is extremely low, generally between 1 uW and 1 mW.

[0037] 3GPP R19 RAN1 defines different AIoT terminal types, as shown in Table 1 below. AIoT terminals can be divided into two categories. One category is terminals that can generate signals themselves; the other category is terminals that cannot generate signals themselves. This type of terminal obtains a backscatter signal by receiving a third-party signal and sends it, so this type of terminal can also be called a backscatter communication-based terminal. Since backscatter communication does not generate a carrier signal, the power consumption of a backscatter communication-based terminal is lower than that of the first type of terminal.

[0038] Table 1

[0039] It should be noted that the types of AIoT terminals in the embodiments of the present application are only three examples, and the types of AIoT terminals are not limited in the embodiments of the present application. For example, it can also include Device 3, which includes the functions of Device 1 and Device 2b, or it can also include a device that includes the functions of Device 2a and 2b.

[0040] 3GPP R19 focuses on multiple AIoT topologies for research, as shown in Figure 1b, including four topologies, wherein,

[0041] Topology 1: Access network device and AIoT terminal are directly connected for uplink / downlink communication. That is, the AIoT terminal sends information to the access network device, or the AIoT terminal receives information from the access network device. Specifically, the carrier signal and the downlink control information are sent by the base station, or the CW is sent by the third-party node. The backscatter signal is received by the same BS, and the BS needs to have duplex capability.

[0042] Topology 2: AIoT terminal and intermediate node are directly connected, and the intermediate node communicates with the access network device for uplink / downlink. That is, the AIoT terminal sends information to the intermediate node or receives information from the intermediate node, and the intermediate node sends information to the access network device or receives information from the access network device. Specifically, the carrier signal and downlink control information are sent by the intermediate node, or the carrier signal is sent by the third-party node. The backscattering signal is received by the same intermediate node. The BS is connected with the intermediate node through the Uu interface. Wherein, the intermediate node can be a relay, an integrated access backhaul (IAB) node, a user equipment (UE), a repeater, etc.

[0043] Topology 3: AIoT terminal unidirectionally communicates with the access network device / auxiliary node. In the left figure, the AIoT terminal directly sends a signal to the access network device, but receives the signal through the auxiliary node. In the right figure, the AIoT terminal can directly receive a signal from the access network device, but sends a signal to the auxiliary node. Wherein, the auxiliary node can be a relay, an IAB node, a UE, a repeater, etc.

[0044] Topology 4: UE and AIoT terminal are directly connected and communicate for uplink / downlink. That is, the AIoT terminal sends information to the UE or receives information from the UE.

[0045] It is worth noting that in addition to the above topologies, if there are other topologies, the scheme of the present application is still applicable.

[0046] In the following embodiments of the present application, unless otherwise specified, the AIoT terminal is referred to as a terminal device, the access network device, the intermediate node, and the UE are referred to as a reader, the transmission direction of the terminal device to the reader is referred to as (device to reader, D2R), and the transmission direction of the reader to the terminal device is referred to as (reader to device, R2D).

[0047] According to the above two topologies, the AIoT system has two communication modes of backscattering communication for device 1 and device 2a and active communication for device 2b. Among them, the backscattering communication mode needs an environmental carrier as a carrier of the information to be modulated, and the active communication mode only considers that the AIoT device actively generates a carrier signal. Unlike the carrier signal of new radio (NR), the carrier of device 1 and 2a can be sent by the BS in Topology 1 or the UE in Topology 2, or by an additional carrier node.

[0048] For the energy storage of AIoT terminal, the relevant conclusions summarized in the FL summary of RAN 1#118, the charging time and discharging time of AIoT terminal are related to factors such as the size of the capacitor, the received power, the energy storage efficiency, the power consumption of AIoT device in different states (ON / OFF / Sleep).

[0049] For different states of AIoT terminal, there are two cases: 1) only ON and OFF two states; 2) there are ON / OFF / Sleep three states. The actions that can be performed in different states and the provisions are as follows:

[0050] The ON state can support: communication signal transmission, signal and signaling reception, etc.

[0051] The OFF state does not support: communication signal transmission, signal and signaling reception, clock maintenance, etc.; The OFF state can support: energy storage, etc.

[0052] The sleep state can support at least one of the following: maintain memory from the ON state, including NVM and VM, such as writing information or ID, maintain the clock for timing in order to switch from sleep to other states, energy storage, listen to certain signals such as preamble / wakeup (activation) signal; The sleep state does not support: communication signal transmission, signal and signaling reception, etc.

[0053] It should be noted that if the AIoT terminal is in OFF or sleep (device unavailable state) and is in energy storage, since the energy storage antenna and the receiving antenna are the same antenna, the AIoT terminal is in an unavailable state, and it needs to be further discussed whether the device available / unavailable state is controlled by the reader, for example, how long the charging time of the AIoT terminal is controlled, which depends on the channel conditions, the transmission power, the size of the capacitor of the AIoT terminal, etc.; Whether the AIoT terminal needs to be in off or sleep state to save power; Whether the AIoT terminal can switch its state if it is not fully charged; For different types of AIoT terminals (such as backscatter and active communication), what is the difference in control information.

[0054] In addition, 3GPP gives several observations for RF energy as a storage energy source: 1) for device 1, RF energy harvesting is a suitable way, and the size of its capacitor can ensure that it at least completes an inventory once; 2) the reader switches to on to receive the paging signal after ensuring that the device is fully charged, and completes the inventory before the power is exhausted; 3) for device 2, in addition to RF energy, other energy sources can also be considered.

[0055] In summary, in the AIoT system, the following problems also need to be considered: 1) how to ensure the sustainable communication of the AIoT terminal when the power is insufficient; 2) how to realize the switching of the AIoT terminal from off to other states if the power of the AIoT terminal is charged above the threshold, in addition, the state transition of the AIoT terminal between on and off needs to be studied; 3) how to realize the reader to control the on and off state switching of the AIoT terminal; 4) the influence of the storage duration on the timing processing.

[0056] Therefore, the embodiments of the present application provide corresponding solutions for the above problems. In order to better understand the present solution, some terms that may be involved in the present solution will be briefly described.

[0057] For ease of description, in the present application, the AIoT terminal is referred to as the terminal or device, the base station, the intermediate node or the UE is collectively referred to as the reader or reader, the transmission direction of the device to the reader is recorded as D2R, and the transmission direction of the reader to the device is recorded as R2D.

[0058] In the AIoT system, in addition to the above-mentioned nodes (base station, AIoT terminal, intermediate node / auxiliary node), there are also nodes that send carrier waves (CW). One function of the CW node is to send a power storage signal to provide energy to the AIoT terminal, that is, the AIoT terminal collects energy by receiving the power storage signal. Another function of the CW node is used for backscatter communication, for example, the uplink signal of device 1 and device 2a is the backscatter signal generated by the AIoT terminal by receiving the carrier signal. The node that provides the power storage signal or the CW can be a base station, an intermediate node, a UE, or a third-party node. Taking the topological structure 1 as an example, the power storage signal or the CW can be sent by the base station, and the AIoT terminal receives the CW and other signals (for example, control information) sent by the base station; the power storage signal or the carrier signal can also be sent by a third-party node, and the AIoT terminal receives the signal (for example, control information) sent by the base station and the power storage signal or the carrier signal sent by the third-party node. That is, the device that sends the carrier signal is the CW node, which can be inside or outside the topological structure for different cases.

[0059] The channels and signals involved in the AIoT system can be as follows:

[0060] The R2D synchronization signal can be included in the R2D preamble, or it can be a separate signal, or it can be another name, and the embodiments of the present application do not limit it. The R2D synchronization signal can be used for the AIoT terminal to obtain time synchronization / frequency synchronization and the starting time of the R2D physical channel. Generally, the R2D synchronization signal will be followed by the R2D physical channel. The embodiments of the present application do not limit other functions of the R2D synchronization signal. The R2D preamble includes two parts: start indication information and synchronization information. The start indication information can be used by the AIoT terminal to determine the starting time of the R2D physical channel, and the synchronization information can be used by the AIoT terminal to obtain time synchronization / frequency synchronization. The synchronization information is the first synchronization information of the following embodiments, and the start indication information is the first start indication of the following embodiments.

[0061] The R2D physical channel can be referred to as PRDCH, or other names, and the embodiments of the present application do not limit it. The R2D physical channel can be used to carry data, load from a higher layer, or control information at layer 1 (L1). The load from the higher layer includes control information from the higher layer.

[0062] The D2R synchronization signal can also be referred to as the D2R preamble, or it can be another name, and the embodiments of the present application do not limit it. The D2R synchronization signal can be used by the reader to obtain time synchronization and the starting time of the D2R physical channel.

[0063] D2R physical channel, which can also be referred to as PDRCH, or other names, and the embodiments of the present application do not limit the same. The D2R physical channel can be used to carry data, load from a high layer, or control information of layer 1 (L1). The load from the high layer includes control information of the high layer.

[0064] R2D intermediate code, which is an intermediate code between two adjacent R2D physical channels, or an intermediate code between two adjacent segments of an R2D physical channel. The R2D intermediate code is used for a terminal device to obtain time synchronization. The embodiments of the present application do not limit the name thereof.

[0065] D2R intermediate code, which is an intermediate code between two adjacent D2R physical channels, or an intermediate code between two adjacent segments of a D2R physical channel. The D2R intermediate code is used for a reader to obtain time synchronization. The embodiments of the present application do not limit the name thereof.

[0066] R2D postamble, which is located after the R2D physical channel, and is used to determine the ending time position of the R2D physical channel. The embodiments of the present application do not limit the name thereof.

[0067] D2R postamble, which is located after the D2R physical channel, and is used to determine the ending time position of the D2R physical channel. The embodiments of the present application do not limit the name thereof. It should be noted that the intermediate code and / or the postamble are optional, and do not necessarily exist.

[0068] R2D signals generated for the reader, the R2D signals can be at least one of the following signals: R2D timing acquisition signal, R2D start-indicator part, R2D clock-acquisition part, PRDCH, R2D midamble, R2D postamble. Wherein, the R2D preamble contains two parts: R2D clock-acquisition part and R2D start-indicator part, the start-indicator part can be used for the AIoT terminal to determine the starting time of the R2D physical channel, the clock-acquisition part can be used for the AIoT terminal to obtain time synchronization / frequency synchronization, the PRDCH is used to carry data, load from higher layer or carry L1 control information, the R2D midamble is the intermediate code between two adjacent PDRCHs or the intermediate code between two adjacent segments of a PDRCH, which can be used for the reader to obtain time synchronization. The R2D postamble is located after the PRDCH, which can be used to determine the end time position of the PRDCH. Different R2D signals can have different signal generation processes, and the signal generation process includes inserting a cyclic prefix (CP), i.e. CP processing.

[0069] AIoT transmission process: AIoT technology can be used indoors or outdoors, and the main application scenarios include inventory, control, positioning and sensing. The main research scenarios of 3GPP Release19 AIoT project are inventory and control, therefore, the DO-DTT (Device-originated–device-terminated triggered) service type is preferred, i.e. the terminal will initiate a session only after receiving the signal of the reader, but the scheme is also applicable to the DO-DOA service scenario. Therefore, the AIoT terminal will not actively initiate a session like a traditional terminal. The process between the reader and the terminal is roughly as shown in FIG. 1c:

[0070] Step A: Reader sends a trigger message to trigger one or more or all terminals to respond. Step A can also be understood as AIoT paging. The content of Step A can include device ID, device group ID, etc. Step A can also include information of resources. Step A can include other content, the specific content is not determined yet, to be further discussed. Step A can be transmitted through PRDCH.

[0071] Step B: The terminal will initiate random access. Step B can include one or more interaction processes. The random process of AIoT can also include contention-based random access and non-contention-based random access.

[0072] Step C: For optional step, in some application scenarios, the terminal will send data or control information to the reader, for example, device ID, high layer information; or the reader sends data or control information to the terminal. Step C and Step B can not be distinguished, such as part or all of the process of Step C can be included in Step B. Step C can include one or more interaction processes.

[0073] The 4-step random access process is roughly as follows, where Msg3 and / or Msg4 are optional.

[0074] Msg1: The terminal sends a random access sequence (also known as random ID) to the reader. Msg1 can be transmitted through D2R preamble or PDRCH;

[0075] Msg2: After the reader receives Msg1, it sends a response message (also known as confirmation information) to the terminal. The response message can include a random access sequence. Msg2 can be transmitted through R2D preamble or PRDCH, where PRDCH is used to carry data, load from high layer or carry L1 control information;

[0076] Msg3: After the terminal receives Msg2, it can send data (e.g., device ID, high layer information) or control information to the reader. Msg3 can be transmitted through D2R preamble or PDRCH;

[0077] Msg4: The reader sends information to the terminal, for example, sends confirmation information to the terminal. Msg4 can be transmitted through R2D preamble or PRDCH.

[0078] The 2-step random access process is roughly as follows:

[0079] Msg1: the terminal sends a device ID or high-level information to the reader. Msg1 can be transmitted through a D2R preamble or a PDRCH;

[0080] Msg2: after receiving Msg1, the reader sends a response message (also referred to as confirmation information) to the terminal. Msg2 can be transmitted through an R2D preamble or a PRDCH.

[0081] Based on this, the communication method provided by the embodiments of the present application will be introduced below. Referring to FIG. 2a, it is a flowchart of a possible communication method, which includes at least one of the following steps:

[0082] 201. The AIoT terminal sends capability information to the reader.

[0083] As a prerequisite, it needs to be understood that the AIoT terminal has different behavior capabilities in different states. For example, it can communicate with the reader in some states, and it can only store energy and not transmit and receive information in some states. In this regard, the state of the AIoT terminal can be divided into multiple states, at least including: a first state, a second state, a third state and a fourth state. The first state can be referred to as an ON state or an active state, the second state can be referred to as an off state or a de-active state, and the third state and the fourth state are both sleep states (such as sleep state or dormant state). The third state and the fourth state can be defined as different sleep degrees. When the AIoT terminal is in the third state, it still has the ability to transmit and receive part of the messages. It needs to be noted that the state of the AIoT terminal such as the first state, the second state, etc. is only an exemplary name, and other names can also be used in actual applications. The specific application is not limited by the present application. The behavior capability of the AIoT terminal in different states is described as follows:

[0084] 1. When the device is in the first state, its capabilities include, but are not limited to: receiving R2D signals, including R2D preamble / midamble / postamble; receiving carrier signals for D2R signal transmission; receiving energy storage signals for energy storage; receiving R2D synchronization signals, such as periodic synchronization signals; sending D2R signals, including D2R preamble / midamble / postamble; sending D2R synchronization signals, such as periodic synchronization signals; maintaining R2D chip level synchronization or clock calibration; initializing or maintaining time counting; receiving AIoT paging messages; if an AIoT paging message is received, the device will perform a random access process or inventory process; if there is a paused random access process or inventory process, it can resume the random access process or inventory process; and reporting energy status, etc.

[0085] 2. When the device is in the second state, its behavioral capabilities include, but are not limited to: receiving CW signals and performing energy storage; not sending PDRCH, D2R preamble / midamble / postamble; not receiving R2D signals, R2D preamble / midamble / postamble; not receiving CW signals used for D2R transmission; not receiving AIoT paging messages; not sending or receiving synchronization signals; not reporting any L1 and higher-layer information; additionally, it includes terminating / clearing the random access process or inventory process; clearing time / frequency domain resource information, clearing the content of AIoT paging messages; clearing the current identifier (temporary ID), group ID, and random ID; clearing the scheduling information of MSG2; retaining the Electronic Product Code (EPC) of Non-Volatile Memory (NVM); retaining the power status of NVM, etc.

[0086] 3. When the device is in the third state, its behavioral capabilities include, but are not limited to: not receiving R2D signals; not sending D2R signals; not receiving AIoT paging messages; receiving energy storage signals for energy storage; sending D2R synchronization signals or receiving R2D synchronization signals, such as periodic synchronization signals; receiving wake-up signals / activation signals, where the wake-up signal can be the R2D start indicator part and / or clock acquisition part, and the wake-up signal is used to trigger the device to switch to the first state; maintaining time counting; reporting energy status; suspending the random access process or inventory process, which may include: retaining time / frequency domain resource information, or the content of AIoT paging messages; retaining temporary ID, group ID, random ID; retaining MSG2 scheduling information, etc.

[0087] 4. When the device is in the fourth state, its behavioral capabilities include, but are not limited to: not receiving R2D signals; not sending D2R signals; not receiving AIoT paging messages; not sending D2R synchronization signals; receiving energy storage signals and performing energy storage; not receiving wake-up / activation signals; not reporting energy status; maintaining time counting; suspending the random access process or inventory process, specifically including: retaining time / frequency domain resource information, or the content of AIoT paging messages; retaining temporary ID, group ID, random ID; retaining MSG2 scheduling information. In other words, the fourth state can be considered as the device being in a completely dormant state.

[0088] Therefore, when the AIoT terminal is in the first or third state, the AIoT terminal reports capability information to the reader. This capability information includes, but is not limited to, at least one of the following: device type, capacitor size, power amplifier capability, and power status information. The device type includes at least one of the following types: terminal device 1, device 2a, device 2b, and device 3. The capacitor size is the maximum size used to store power. The power amplifier capability includes whether the AIoT terminal has an LNA / reflection amplifier / PA and the amplification factor of the LNA / reflection amplifier / PA. The power status information is capability information related to the power status and may include at least one of the following: no power, fully charged, and N% of the fully charged state, where N ranges from (0 to 100).

[0089] It should be noted that the trigger mode of the AIoT terminal reporting the capability information can include passive trigger reporting and active trigger reporting. Specifically,

[0090] Passive trigger reporting: the reader sends query indication information to the AIoT terminal, the query indication information includes but is not limited to at least one of the following indications: power state query indication and / or residual power query indication; wherein the power state query indication is used to query the AIoT terminal for at least one of the following information: residual power, whether full power, whether reaching n% of full power state, whether lower than m% of full power state, m and n are predefined, the value range is (0, 100); the residual power query indication is used to query the AIoT terminal for its residual power or current power. The query indication information can carry but is not limited to one of the following information: R2D control signaling, paging message, listening signal, trigger message, or high layer signaling mapped to the first channel, the first channel is the channel for the reader to transmit data or signal to the AIoT terminal, and the first channel can include PRDCH. Therefore, the specific message carried by the query indication information is not limited in the present application.

[0091] After the AIoT terminal receives the query indication information, it responds to the reader with second information, which is used by the reader to determine the power state of the AIoT terminal, the second information includes but is not limited to one of the following information: User Equipment Assistance Information (UAI), or D2R special information, wherein the D2R special information includes the preamble / Midamble / Postamble sequence of the D2R signal, or the repetition / data rate field of the data carried by the second channel, the second channel is the channel for the AIoT terminal to transmit data or signal to the reader, wherein the second channel can include PDRCH. Specifically, the D2R preamble / Midamble / Postamble implicitly represents the power state information of the AIoT terminal, such as 101010 representing insufficient power state and 111111 representing full power state.

[0092] Active reporting: when the preset triggering condition is met, the AIoT terminal actively reports its power state information to the reader. Among them, the triggering condition includes at least one of the following conditions: according to the write state of the device memory, the power is full / reaches N% of the full power state, or according to the write state of the device memory, the power is lower than Y% of the full power state, wherein N and Y are both predefined and can be set according to actual needs; or the state of the AIoT terminal is switched from the current state to a more active state, for example: from off state to on state, from sleep state to on state, from off state to sleep state. It should be noted that the time-frequency resources occupied by the AIoT terminal actively reported are predefined, or can be indicated by the previous round of inventory, and the specific limitation is not limited.

[0093] Considering that there are AIoT terminals that do not store energy through RF energy, in order for the reader to know the power state of the AIoT terminal, the AIoT terminal can actively report or the reader can trigger the terminal to report. Specifically, 1. AIoT terminal active reporting: the AIoT terminal actively reports its power state information when the power is full or reaches a threshold. For example, after setting N% of the full power of the device capacitor, the AIoT terminal actively reports its power information according to the preconfigured resource. So that the reader waits for the AIoT terminal to actively report its power state before sending Msg0. After the reader receives the power state information, the reader sends Msg0 to the AIoT terminal. Among them, the power state information can be carried in UAI or D2R specific information; 2. Reader triggers terminal reporting: sends trigger information to the AIoT terminal to trigger the AIoT terminal to report its power state information, as shown in FIG. 2b, which is a flowchart of another possible communication method provided by the embodiment of the application. Among them, the reader sends trigger information to the AIoT terminal, which can be trigger message or the above-mentioned query indication information, to trigger the AIoT terminal to report its power state information. In response to the trigger information, the AIoT terminal sends UAI or D2R specific information carrying the power state information to the reader. It should be noted that sending trigger information is an optional step, that is, in some cases, the AIoT terminal can actively report its power state information. After receiving the power state information, the reader confirms to send mg0 to the AIoT terminal to indicate the resource of the AIoT terminal to send the signal. Optionally, the reader and the AIoT terminal perform a random access process.

[0094] In the mode of triggering the terminal to report by the reader / writer, optionally, the reader / writer can also be triggered by sending a wake-up signal. Specifically, a wake-up signal of a first power level is sent to the AIoT terminal based on a predefined mapping relationship, and the predefined mapping relationship is a mapping relationship between different sending power levels of the wake-up signal and the power state of the AIoT terminal. If an ACK signal sent by the AIoT terminal is received, it is determined that the power state information of the AIoT terminal is a full power state or exceeds the full power state by N%. For example, the table of the predefined mapping relationship can be shown in Table 2 as follows. For example, the sending power level of the signal is divided into two types I and II. Under each sending power level, the power state of the AIoT terminal is determined by whether the feedback information of the AIoT terminal is received and the reference signal receiving power (RSRP) of the feedback information. Specifically, when the sending power level is I, if the feedback information of the AIoT terminal is not received, the reader / writer cannot determine the power state thereof. If the feedback information of the AIoT terminal is received and the receiving power of the feedback information reaches RSRP1, the reader / writer determines that the power state of the AIoT terminal reaches N% of the full power state. If the receiving power of the feedback information reaches RSRP2, the reader / writer determines that the power state of the AIoT terminal reaches the full power state. It should be noted that if the reader / writer increases the sending power of the wake-up signal and still cannot receive the feedback signal of the AIoT terminal, it is determined that the AIoT terminal is in a charging state.

[0095] Table 2

[0096] 202. The reader / writer determines the first information according to the capability information;

[0097] After receiving the capability information of the AIoT terminal, the reader / writer determines the first information according to the capability information. The first information is used for the intermediate node to send the energy storage signal and / or the carrier signal. The first information can be carried by R2D control information, can be a control information used to carry the first information discussed separately, or can be carried by PDCCH / PDSCH. The specific application is not limited. It should be noted that the reader / writer can be a gNB / UE / Relay, and the intermediate node can be a dedicated radio frequency energy (RF) energy supply or external CW providing device controlled by the reader / writer. For example, when the first node is a base station, the intermediate node can be a UE.

[0098] Specifically, when the first trigger condition is met, the reader can determine the first information according to the capability information and the first auxiliary information to send to the intermediate node. Wherein, the first trigger condition includes but is not limited to at least one of the following conditions: 1. The interference measurement value is greater than the first threshold value, wherein the interference measurement value is measured by the NR device on the corresponding interference signal when the intermediate node sends the signal, and then the interference measurement value is reported to the reader. If the interference measurement value is greater than the first threshold value, it is considered that the first trigger condition is met. 2. The channel state information (Channel State Information, CSI) of the channel between the reader and the AIoT terminal is deteriorated and the difference is greater than the second threshold value. Specifically, the reader estimates the channel between the reader and the AIoT terminal according to the Preamble / Midamble of the D2R signal, and determines whether the first trigger condition is met according to the channel state information.

[0099] The first auxiliary information is sent by the AIoT terminal, and includes but is not limited to at least one of the following information: power saving request information, power shortage report, full power state report and communication state (on / sleep / off) report.

[0100] The determined first information includes at least one of the following information for the intermediate node to send the energy storage signal and / or the carrier signal: on-demand type indication, periodic type indication and semi-persistent type indication.

[0101] In the embodiments of the present application, the reader can send the first information based on the device types of different AIoT terminals in the coverage range or the communication state of the AIoT terminal, that is, the On-demand type carried by the first information indicates different device types of AIoT terminals, and the corresponding energy storage signal transmission power level and energy storage time length level. For example, as shown in Table Three below, the device types corresponding to the AIoT terminal are device 1, device 2a and device 2b, the power levels corresponding to each device type are I, II and III, and the energy storage time lengths are T1 / always, T2 and T3, respectively. Since the capacitance size of device 1 is the smallest, the energy storage time is also the shortest, and in some cases, limited by the coverage range of device 1, device 1 can be continuously charged and discharged, and the shortest energy storage time T1 and the lowest power level of the energy storage signal can be configured, or device 1 can be continuously charged, that is, the energy storage time of device 1 is T1 or always. The capacitance size of device 2a is larger than that of device 1, and its energy storage time T2>T1 is configured, and there can be a low noise amplifier (LNA) and a reflection amplifier, and the transmission power level of the configured energy storage signal is higher than that of device 1. Similarly, the capacitance size of device 2b is the largest, and its energy storage time T3>T2>T1 is configured, and T3<always, and there can be an LNA and an amplifier, and the transmission power level of the configured energy storage signal is higher than that of device 2a. That is, the transmission power level of the corresponding energy storage signal is I<II<III. It should be noted that the values of T1, T2 and T3 can be the full charge time of the smallest capacitance size in the farthest coverage case.

[0102] Table Three

[0103] Alternatively, the on-demand type is also used to indicate different types of communication state switching of the AIoT terminal, corresponding energy storage signal transmission power levels and energy storage time levels, and exemplarily as shown in Table Four below. Different types of communication state switching include OFF->Sleep, Sleep->OFF and ON->OFF, and corresponding energy storage time is T1, T2 and T3 respectively, and corresponding energy storage signal transmission power levels are I, II and III respectively. For OFF->Sleep, sleep can also store energy (e.g., light sleep), but the sleep state indicates that the device has power, and a too long charging time and a power level of the energy storage signal that is too high are not required, and the shortest energy storage time T1 and the lowest power level of the energy storage signal can be configured. For Sleep->OFF, switching from the Sleep state to the OFF state indicates that the device does not need to listen to the activation signal or the preamble / paging signal, and can be completely in the energy storage state. However, since it is switched from sleep to OFF, it indicates that the device does not need to communicate in the future period of time, and cannot indicate that it is caused by power failure to interrupt communication. Therefore, a general charging time T2 and a general intensity power level II can be configured. For ON->OFF, it indicates that the device has completed communication and switched to OFF, or the device is completely out of power and switched to OFF due to communication interruption. Therefore, a longer charging time T3 and a higher power level III of the energy storage signal can be configured. In summary, in Table Four, T1 < T2 < T3, I < II < III.

[0104] Table Four

[0105] In addition, the periodic type indication in the first information is used to indicate that the intermediate node periodically transmits the energy storage signal when the second trigger condition is met. The second trigger condition includes but is not limited to at least one of the following conditions: all AIoT terminals in the coverage range are of the same type, the distance between the intermediate node and each AIoT terminal is the same, and the charging period is periodically transmitted based on each service type, for example, the charging period of the Command service is T1; the charging period of the inventory service (two-step random access) is T2; and the charging period of the inventory service (four-step random access) is T3.

[0106] Optionally, the periodic type indication is also used to indicate that when the energy storage signal is periodically transmitted, the transmission period gradually decreases or increases, and the interval gap between different periods is related to the discharge time of the weakest AIoT terminal. For example, the period of the first transmission of the energy storage signal is T3, the second is T2, and the third is T1. The values of T1, T2 and T3 are the full charge time of the smallest capacitance size under the farthest coverage condition. The gap between different periods depends on the discharge time of the weakest AIoT terminal.

[0107] The semi-persistent type indication in the first information is used to instruct the intermediate node to continuously transmit the carrier signal as the energy storage signal after receiving the first information.

[0108] It should be noted that there are different cases for the reader to configure resources for the intermediate node to transmit the energy storage signal and / or the carrier signal, and the information included in the first information is also different. Specifically,

[0109] Case one: the energy storage signal and the carrier signal occupy the same resource block (RB). For the AIoT terminal, the energy storage signal and the carrier signal can be different signals or the same signal. In this case, the reader configures the same frequency domain resource to the intermediate node, and an exemplary configuration time-frequency resource diagram is shown in FIG. 2c, which is a possible configuration time-frequency resource diagram, wherein the energy storage signal and the carrier signal occupy the same frequency domain resource.

[0110] Case two: the energy storage signal and the carrier signal occupy different resource blocks. Please refer to FIG. 2d, which is another signal time-frequency resource diagram provided by the embodiments of the present application, wherein the energy storage signal and the carrier signal occupy different time-frequency domain resources. In this case, the first information configures the transmission resource of the energy storage signal, and the first information also needs to indicate the transmission opportunity, frequency domain resource, etc. of the carrier signal. Specifically, the frequency domain resource indication of the carrier signal can be any of the following: direct indication, directly indicating the frequency domain resource of the carrier signal through the first information, the first information can be carried in the physical downlink control channel (PDCCH) / physical downlink shared channel (PDSCH), or through a dedicated channel; implicit indication, after configuring the center frequency of the energy storage signal and the RB occupied, indicating the frequency offset of the carrier signal relative to the energy storage signal.

[0111] The indication manner of the transmission start time of the carrier signal can be at least one of the following: direct indication, directly indicating the transmission start time of the carrier signal by the first information; implicit indication, including: as shown in FIG. 2d, according to the time domain offset amount Δt1 of the end time of the energy storage signal configured by the first information; or, according to the time domain offset amount Δt2 of the start time of the energy storage signal configured by the first information; or, according to the time domain offset amount Δt3 of the start time of the activation signal, which can be configured by the first information or other information sent by the reader-writer; or, according to the communication state of the AIoT terminal, for example, when the AIoT terminal changes from OFF / Sleep to ON, the time of ON is the start time of the transmission of the carrier signal, wherein the communication state of the AIoT terminal can be borne by the first information or notified to the intermediate node by the reader-writer through other information.

[0112] 203. The reader-writer sends the first information to the intermediate node.

[0113] After determining the first information, the reader-writer sends the first information to the intermediate node, which is used to determine the transmission resource of the energy storage signal and / or the carrier signal, including but not limited to frequency resource, duration, time-frequency offset amount with the R2D signal or the energy storage signal, etc.

[0114] The first information can be borne by the R2D control information, or can be control information used to bear the first information alone, or can be borne by the PDCCH / PDSCH, which is not limited in the present application.

[0115] 204. The reader-writer sends the first signal to the AIoT terminal.

[0116] The reader-writer sends the first signal to the AIoT terminal, and the first signal is used to select or activate the AIoT terminal. The first signal is a signal transmitted from the reader-writer to the AIoT terminal, which can be an R2D signal. For the convenience of description, the present application takes the first signal as an R2D signal as an example for description.

[0117] Optionally, the reader-writer can also indicate the target state to which the AIoT terminal needs to switch and / or the duration in the target state to the AIoT terminal through the R2D signal. That is, the reader-writer can instruct the AIoT terminal to switch the state, and optionally, the AIoT terminal can also actively switch the state. Specifically, as shown in FIG. 2e, a possible terminal state switching diagram provided by the present application, the AIoT terminal can switch the state in different time periods, and the present application defines the conditions or indication information of state switching and the switching time required for state switching. The following will be described respectively for the state in which the AIoT terminal can currently be and how to switch to other states:

[0118] When the AIoT terminal is in the second state, no signal is received, and the reader cannot indicate the device to switch the state through signaling. The AIoT terminal can switch the state through conditional judgment, that is, when the preset condition is met, the AIoT terminal is switched from the second state to the target state. The preset condition includes that when the energy of the AIoT terminal reaches the threshold, the AIoT terminal is switched to the first state or the third state. Specifically: 1) The AIoT terminal is switched from the second state to the first state. On the reader side, the reader cannot know when the device leaves the second state without knowing the charging efficiency and the power of the AIoT terminal. The AIoT terminal is switched from the second state to the first state. In a period of time (such as T1 in FIG. 2e), the AIoT paging message is received. If the AIoT paging message is not received within T1, in order to save the power consumption of the AIoT terminal, the AIoT terminal can enter the third state after T1. And the AIoT terminal needs to calculate the time when it is switched to the first state next time, that is, to calculate the duration T2 of being in the third state. The duration T2 is related to at least one of the following parameters: the duration of one round of inventory, the duration of the last state, that is, T1, or a variable duration, and the like. The variable duration is related to the offset of the charging duration and the inventory duration. It can also include the state switching time from the second state to the first state. Specifically, it can be represented by the following calculation formula: T2 = the duration of one round of inventory - T1 - T0, wherein the duration of one round of inventory and T1 can be protocol predefined or set according to actual needs; T0 is a variable duration. 2) The AIoT terminal is switched from the second state to the third state. After the AIoT terminal enters the third state, based on the device capability in the third state, the AIoT terminal can receive the synchronization signal and / or the wake-up signal. According to the wake-up signal, the AIoT terminal can be switched to the first state. If the AIoT terminal does not receive the wake-up signal within a period of time such as T3, the AIoT terminal can be switched back to the second state or switched to the fourth state to further save power consumption. The value of T3 can be protocol predefined or indicated by the reader, which is not limited in the present application.

[0119] When the AIoT terminal is in the first state, the state switching of the AIoT terminal can be performed by indicating the AIoT terminal through the reader, that is, the reader sends state switching indication information to the AIoT terminal. The state switching indication information is used to indicate that the AIoT terminal is switched from the first state to the target state. The target state is at least one of the following: the second state, the third state, and the fourth state. The state switching indication information includes but is not limited to at least one of the following information: the duration of the target state, the state switching time. The specific indication manner can include but is not limited to the following manners:

[0120] Manner one: the AIoT terminal requests to enter the target state by sending state switching request information to the reader, and the reader sends state switching indication information to the AIoT terminal after receiving it, to indicate switching from the first state to the target state. For example, the AIoT terminal requests to enter the second state, the third state or the fourth state by MSG3 to the reader, and the reader further indicates entering the second state, the third state or the fourth state, and the duration of the third state / the fourth state, for example, the duration is X inventory duration;

[0121] Manner two: the reader sends a third signal carrying the state switching indication information to the AIoT terminal, so that the AIoT terminal enters the target state after sending a fourth signal, where the fourth signal is used for the AIoT terminal to respond to the third signal. For example, the reader indicates entering the second state, the third state or the fourth state by MSG2, and the AIoT terminal enters the second state, the third state or the fourth state after sending MSG3. The indication manner can be per device indication to each AIoT terminal, or per device group indication to each AIoT terminal group;

[0122] Manner three: the reader sends state switching indication information to the AIoT terminal after receiving the energy state information sent by the AIoT terminal. For example, the reader indicates entering the second state, the third state or the fourth state, and the duration of the third state / the fourth state after the AIoT terminal reports the energy state.

[0123] Manner four: the reader indicates the AIoT terminal to switch from the first state to the third state or the fourth state by state switching indication information, and the state switching indication information includes the time domain offset between the first channel and the second channel, and the time domain offset is the duration of the third state or the fourth state. For example, the reader indicates the offset between PRDCH and PDRCH, and the offset is used as the duration of the third state or the fourth state.

[0124] When the AIoT terminal is in the third state or the fourth state, the switching can be indicated by the reader or based on a preset switching condition, which can include but is not limited to the following modes: Mode 1: based on the indication of the reader, after the indicated time duration, the AIoT terminal switches to the first state; Mode 2: when the preset condition is met, the AIoT terminal can switch to the first state in advance, for example, the preset condition is that the AIoT terminal receives a wake-up signal; Mode 3: when in the third state, the AIoT terminal only receives / transmits signals (including but not limited to synchronization signals, wake-up signals and energy status reporting) in a period of time or at a specific time position, so as to avoid the AIoT terminal receiving / transmitting signals all the time; Mode 4: when the power of the AIoT terminal is lower than a threshold, the AIoT terminal switches from the third state to the fourth state or to the second state.

[0125] Further, in the above state switching process, in order for the reader to know the time when the AIoT terminal completes the state switching (except for the second state), the switching time of the state switching can also be defined. Considering the switching between different states, the internal modules of the AIoT terminal can involve the process of power ramping up and / or power ramping down, and the duration of the process depends on the capability of the AIoT terminal, therefore, the switching time can optionally include the time of power up and / or power down of the internal modules of the AIoT terminal. It should be noted that when the reader controls the AIoT terminal to switch states through indication information, the AIoT terminal needs to complete the processing of the indication information before switching states, therefore, the switching time can also include T R2Dmin , i.e. the minimum processing time between R2D and D2R. In addition, it should be noted that for AIoT terminals of different device types, the switching time can be different, for example, the switching time of device 2a is M1 and the switching time of device 2b is N1 when switching from the third state to the first state; the switching time of the AIoT terminal can also be different when switching between different states, for example, the switching time M2 when switching from the third state to the first state, and the switching time N2 when switching from the second state to the first state.

[0126] 205, the intermediate node sends an energy storage signal and / or a carrier signal to the AIoT terminal based on the first information;

[0127] After receiving the first information, the intermediate node sends an energy storage signal and / or a carrier signal to the AIoT terminal based on the first information. Specifically, when the first information includes at least one of the following information for the intermediate node to send an energy storage signal and / or a carrier signal: On-demand type indication, periodic type indication and semi-persistent type indication, the intermediate node sends an energy storage signal and / or a carrier signal based on the indication content.

[0128] For example, when the first information includes an on-demand type indication, the energy storage signal is sent to the AIoT terminal according to the corresponding transmission power level and energy storage duration based on the device type of the AIoT terminal. For example, when the device type of the AIoT terminal is device 2a, the energy storage signal with a transmission power level of II is sent to the AIoT terminal according to Table 2, and the energy storage duration is T2. Alternatively, the energy storage signal is sent to the AIoT terminal according to the corresponding transmission power level and energy storage duration based on the communication state switching of the AIoT terminal. For example, when the AIoT terminal switches from the sleep state to the off state, the energy storage signal with a transmission power level of II is sent to the AIoT terminal according to Table 3, and the energy storage duration is T2.

[0129] When the first information includes a periodic type indication, if the intermediate node determines that all AIoT terminals in the coverage range are of the same type and the distance between the intermediate node and each AIoT terminal is the same, the energy storage signal is periodically sent; or the periodic sending is performed based on the charging period corresponding to each service type.

[0130] When the first information includes a semi-persistent type indication, the intermediate node continuously sends the carrier signal as the energy storage signal after receiving the first information.

[0131] 206, the reader sends Msg0 to the AIoT terminal;

[0132] The reader also sends Msg0 to the AIoT terminal to indicate the resource of the transmission signal to the AIoT terminal.

[0133] It should be noted that in actual application, Msg0 and R2D can be two independent signals, or they can be the same signal, which is not limited here. For example, the information indicated by Msg0 is carried in the R2D signal, that is, the R2D signal is also used to indicate the resource of the transmission signal to the AIoT terminal. It should be noted that as a receiving end, the AIoT terminal will only receive the R2D signal when it is in the above-mentioned first state, third state or fourth state.

[0134] In addition, it should be noted that when the reader configures the same RB for the intermediate node to send the energy storage signal and the carrier signal, the reader sends Msg0 to the AIoT terminal to indicate the transmission signal resource, which is also used to indicate the time when the AIoT terminal switches from receiving R2D to D2R transmission, that is, the time when the intermediate node switches from sending the energy storage signal to sending the carrier signal.

[0135] 207, the AIoT terminal sends a second signal to the reader to perform inventory business.

[0136] After receiving the resource indicated by the sending signal of the reader-writer, the AIoT terminal sends a second signal to the reader-writer based on the resource to perform the inventory business, that is, to request to enter the random access procedure. The second signal is a signal with a transmission direction from the AIoT terminal to the reader-writer, and the second signal can be a D2R signal. For ease of description, the second signal is taken as an example of a D2R signal in this application.

[0137] As described above, the random access procedure is divided into 2 steps and 4 steps, including that the AIoT terminal can send Msg1 to the reader-writer through D2R preamble or PDRCH, and Msg1 carries the random ID or Device ID of the AIoT terminal. After receiving Msg1, the reader-writer sends Msg2 to the AIoT terminal as a response message to complete the random access procedure. Optionally, subsequent Msg3 and Msg4 are sent to realize the sending and response of data or control information. The specific process is not described here. For this, the processing time between two consecutive signals in the communication procedure is defined, including maximum processing time, minimum processing time, and common processing time. The common processing time is the processing time that meets all AIoT terminal types. The definition of the specific processing time is as follows:

[0138] Minimum processing time: TR2D_min: minimum time interval between R2D signal and corresponding D2R signal, for example, minimum time interval between Msg0 and the second signal in FIG. 2a; TD2R_min: minimum time interval between D2R signal and corresponding R2D signal, for example, minimum time interval between MSG1 and MSG2 in FIG. 1c; TR2D_R2D_min: minimum time interval between two consecutive R2D signals, for example, minimum time interval between R2D and Msg0 in FIG. 1c; TD2R_D2R_min: minimum time interval between two consecutive D2R signals.

[0139] Maximum processing time: TR2D_max: maximum time interval between R2D signal and corresponding D2R signal, for example, maximum time interval between Msg0 and the second signal in FIG. 2a; TD2R_max: maximum time interval between D2R signal and corresponding R2D signal, for example, maximum time interval between MSG1 and MSG2 in FIG. 1c.

[0140] In summary, the minimum processing time includes but is not limited to at least one of the following: R2D_min , T D2R_min , TR2D_R2D_min The maximum processing time includes but is not limited to at least one of the following: T R2D_max T D2R_max It should be noted that at least one of the above maximum processing time, minimum processing time and common processing time includes: state switching time of the AIoT terminal and / or energy storage time of the AIoT terminal. Taking T R2D_min as an example, T R2D_min contains state switching time, so the AIoT terminal can enter sleep state for energy storage after receiving PRDCH. For example, T R2D_R2D_min The defined T R2D_R2D_min needs to be greater than or equal to the energy storage time of the AIoT terminal, so that the AIoT terminal has enough power when it starts inventorying.

[0141] It should be noted that when the intermediate node periodically sends energy storage signals, and the period of sending the energy storage signal gradually increases or decreases, the period of sending the energy storage signal for the first time is defined as T3, the second time is T2, and the third time is T1. The values of T1, T2 and T3 are the full charging time of the minimum capacitor size under the farthest coverage condition, and the lengths of T2 and T1 are also related to the processing timing.

[0142] In the embodiments of the present application, in the face of different device energy storage capabilities and data transmission needs, new functions are defined in the existing states of the protocol and new states are defined. The reader determines the first information according to the capabilities of the device, and sends the first information to the intermediate node. The first information is used to indicate the time-frequency resources of the intermediate node for sending energy storage signals and / or carrier signals. The AIoT energy storage scheme is proposed to ensure the reliability of the AIoT communication system while saving the energy of the AIoT terminal, and to solve the problem of low reliability caused by battery-free in passive Internet of Things devices.

[0143] In the present application, in order to avoid the problem that the AIoT terminal enters the OFF state before the inventorying ends due to inconsistent discharging time during the inventorying process, it can also be considered which AIoT terminals can be prioritized for inventorying to improve the reliability of communication. For details, please refer to FIG. 3, which is another possible communication method flowchart provided by the embodiments of the present application, including at least one of the following steps:

[0144] 301. The reader sends first information to the AIoT terminal;

[0145] The reader sends first information to the AIoT terminal, which can be the query indication information in the embodiment shown in FIG. 2a. Details are not repeated here.

[0146] 302. In response to the first information, the AIoT terminal sends second information to the reader,

[0147] The second information is used for the reader to determine the power state information of the AIoT terminal, to configure the AIoT terminal with the information of the transmission block size (TBS), time-frequency resource, MCS, repetition, etc. of the R2D signal or D2R.

[0148] 303. The reader sends Msg0 to the AIoT terminal;

[0149] After receiving the second information sent by the AIoT terminal, the priority inventory principle is determined according to the second information, and Msg0 is sent to the AIoT terminal. Msg0 is also used to specify the AIoT terminal for priority inventory and the AIoT terminal entering the priority inventory sequence (i.e. grouping information), and to indicate the state transition and state duration of the AIoT terminal entering the priority inventory sequence.

[0150] The priority inventory principle includes at least one of the following principles: far and near effect principle, AIoT terminal type principle, transmission block TBS size principle, service type principle, and service traffic principle. It is worth noting that the priority inventory principle is also applicable to the command service, the sensing service, and the positioning service, which are not limited here and are only introduced as an example of inventory. In the far and near effect principle, the inventory priority is related to the distance of the AIoT terminal to the reader; in the device type principle, the inventory priority is related to the type of the AIoT terminal; in the TBS size principle, the inventory priority is related to the TBS size configured for the AIoT terminal; in the service type principle, the inventory priority is related to the type of the service corresponding to the AIoT terminal, and the type of the service at least includes the inventory service and the control service; in the service traffic principle, the inventory priority is related to the priority of the service corresponding to the AIoT terminal, for example, different services such as DO-DOA service or DO-DOT have different inventory priorities.

[0151] When the priority inventory principle is the far and near effect principle, the reader measures the distance of the AIoT terminal according to the second information and groups them, and Msg0 indicates that AIoT terminals of different distances are divided into different groups:

[0152] The closest AIoT terminal: priority inventory, switch to the ON state or the standby active state;

[0153] The intermediate AIoT terminal: before receiving the dedicated wake-up signal, enter the Sleep state to listen to the R2D preamble or the activation signal or the wake-up signal state. The R2D preamble carries the ID information of the intermediate AIoT terminal, and Msg0 indicates the duration of the intermediate AIoT terminal in this Sleep state;

[0154] Far AIoT terminal: enter OFF state or Sleep state. Msg0 also indicates the duration of OFF / Sleep, and it is noted that the duration is determined by the reader according to the first information; Msg0 indicates the time length for the group of AIoT terminals to remain in the state.

[0155] When the priority inventory principle is the device type principle, the reader groups AIoT terminals according to their types, and Msg0 indicates that AIoT terminals of different types are divided into different groups:

[0156] device 1: priority inventory, indicating entering ON state or standby activation state;

[0157] device 2a: before receiving a dedicated wake-up signal, enter a Sleep state to listen to R2D preamble or activation signal or wake-up signal. The R2D preamble carries the ID information of the intermediate AIoT terminal, and Msg0 indicates the time length for the group of intermediate AIoT terminals to remain in the Sleep state;

[0158] device 2b: enter OFF state or Sleep state. Msg0 also indicates the duration of OFF / Sleep, and it is noted that the duration is determined by the reader according to the first information; Msg0 indicates the time length for the group of AIoT terminals to remain in the state.

[0159] It is noted that in actual applications, the priority principle of grouping according to device type can have multiple forms, for example, device 2b has priority in inventory, followed by device 2a, and then device 1, which is not limited here.

[0160] When the priority inventory principle is the TBS size principle, the reader implicitly determines the grouping according to the size of the TBS to be configured:

[0161] TBS is small: priority inventory, switch to ON state or standby activation state;

[0162] TBS is medium size: before receiving a dedicated wake-up signal, enter a Sleep state to listen to R2D preamble or activation signal or wake-up signal. The R2D preamble carries the ID information of the intermediate AIoT terminal; Msg0 indicates the time length for the group of intermediate AIoT terminals to remain in the state.

[0163] TBS is large: enter OFF state or Sleep state. Msg0 also indicates the duration of OFF / Sleep, which is determined by the reader according to the first information; Msg0 indicates the duration of the state of the group of AIoT terminals. In actual application, the priority principle of the foregoing TBS size grouping is not unique, and there can be multiple, which is not limited in the present application. Similarly, implicit grouping can also be performed according to the chip length, which will not be described here.

[0164] When the priority inventory principle is the service type principle, that is, the reader determines the grouping according to the service demand and access flow steps of the AIoT terminal:

[0165] Command service: priority inventory. Enter ON state or active state;

[0166] 2-step random access inventory service: enter Sleep state to listen to R2D preamble or activation signal or wake-up signal state before receiving a dedicated wake-up signal. R2D preamble carries intermediate device ID information; Msg0 indicates the duration of the state of the group of devices;

[0167] 4-step random access inventory service: OFF state or Sleep state. Define first information to indicate the duration of OFF / Sleep of AIoT device; take Msg0 as an example, assuming that the first information is Msg0, then Msg0 also indicates the duration of the state of the group of AIoT terminals. In actual application, the priority principle of the foregoing service type grouping is not unique, and only one embodiment is given here.

[0168] When the priority inventory principle is the service traffic principle, that is, if the AIoT terminal corresponds to a high-priority service, it can actively initiate an access flow to the reader. For example, DO-DOA traffic service.

[0169] 304, the reader and the AIoT terminal perform inventory service.

[0170] The AIoT terminal receives Msg0 and determines the target state to be converted and the duration of the target state according to the Msg0. When the AIoT terminal is inventoried, the AIoT terminal enters the ON state or the active state; when the AIoT terminal is waiting for inventory, it enters the sleep state or the off state, and Msg0 also includes the duration of maintaining the sleep state or the off state.

[0171] When the AIoT terminal is inventoried, Msg 1 is sent to the reader to request access to perform 2-step random access inventory service or 4-step random access inventory service, and the specific access process will not be described here.

[0172] In summary, in the embodiments of the present application, the priority inventory principle is defined, for example, the AIoT terminal with low device capability is preferentially inventoried; the AIoT terminal with high capability enters sleep and waits for wake-up; if the AIoT terminal with high capability has a special request, for example, the corresponding service is a high-priority service, the AIoT terminal with high capability can also actively send a request for access, for example, access by sending MSG 1. A variety of inventory rules are provided to make the communication process more reliable.

[0173] When the intermediate node is a UE, the reader is a base station. Considering that the radio resource control (RRC) state of different UEs will affect the transmission power of the energy storage signal and the carrier signal, and further affect the charging and discharging of the AIoT terminal and resource configuration. Therefore, the energy storage and resource coordination problems of the UE in different RRC states need to be considered, wherein the RRC state of the UE includes: connected state Connected, inactive state Inactive and idle state Idle. Two cases are specifically considered: 1. Energy harvesting when the UE is in the RRC connected state; 2. Energy harvesting when the UE is in the RRC state switching.

[0174] For case 1, the UE in the RRC connected state sends the energy storage signal / carrier signal to the AIoT terminal, so as to discuss the transmission resource configuration of the energy storage signal / carrier signal.

[0175] The base station sends first information to the UE, which is used for the UE to send the energy storage signal / carrier signal, and can include transmission resource information of the energy storage signal / carrier signal. If the energy storage signal and the carrier signal are the same signal and occupy the same frequency domain resource, the first information sent by the base station includes: a frequency interval of the received signal, or a center frequency of the energy storage signal / carrier signal. Optionally, the first information can also include a time domain offset of the energy storage signal / carrier signal relative to the received signal. If the energy storage signal and the carrier signal are not the same signal, the first information includes: time-frequency resources configured by the base station for the energy storage signal and the carrier signal respectively. For ease of understanding, the resource configuration of the energy storage signal / carrier signal is further discussed by whether the UE supports full duplex, and please refer to FIG. 4a, which is a signal time-frequency resource diagram provided by an embodiment of the present application. The upper diagram in FIG. 4a is that the energy storage signal and the carrier signal are the same signal, and the lower diagram is that the energy storage signal and the carrier signal are not the same signal. Based on FIG. 4a, when the UE has duplex capability and is in an RRC connected state, the energy storage signal or the carrier signal can be sent in the downlink while the received signal (for example, a D2R signal) is received in the uplink, or the energy storage signal or the carrier signal can be sent in the uplink while the received signal (for example, an NR signal) is received in the downlink. 1) When the energy storage signal and the carrier signal are the same signal and occupy the same frequency domain resource, the base station only needs to configure a frequency interval △f of the energy storage signal / carrier signal and the received signal or a center frequency of the energy storage signal / carrier signal; 2) When the energy storage signal and the carrier signal are not the same signal, the base station needs to configure different time-frequency resources for the energy storage signal and the carrier signal, for example, a frequency interval of the energy storage signal and the received signal is △f1, a frequency interval of the carrier signal and the received signal is △f2; time domain offsets of the start position of the carrier signal, the start position of the energy storage signal, and the end position of the energy storage signal relative to the received signal are △t3, △t2, and △t1 respectively.

[0176] Referring to FIG. 4b, another signal time-frequency resource diagram provided by the embodiment of the application is shown. The upper diagram in FIG. 4a is that the energy storage signal and the carrier signal are the same signal, and the lower diagram is that the energy storage signal and the carrier signal are not the same signal. Based on FIG. 4b, when the UE has no duplex capability and is in the RRC connected state, when the UE receives a signal (for example, a D2R signal) in the uplink, it switches to send an energy storage signal or a carrier signal in the downlink; or, after receiving a signal (for example, an NR signal) in the downlink, it switches to send an energy storage signal or a carrier signal in the uplink. 1) When the energy storage signal and the carrier signal are the same signal, the same frequency domain resource is occupied, and the base station needs to configure the frequency interval △f of the energy storage signal / carrier signal relative to the received signal or the center frequency of the energy storage signal / carrier signal, the time domain offset △t of the energy storage signal / carrier signal relative to the received signal (△t is greater than the switching time of the uplink and downlink of the UE); 2) When the energy storage signal and the carrier signal are not the same signal, the gNB needs to configure different time-frequency resources for the energy storage signal and the carrier signal, for example, the frequency interval of the energy storage signal and the received signal is △f1, the frequency interval of the carrier signal and the received signal is △f2; the time domain offset of the end position of the carrier signal relative to the received signal, the start position of the energy storage signal, and the end position of the energy storage signal is △t3, △t2, and △t1, respectively. At the same time, the time domain offset of the energy storage signal relative to the received signal is △t, and it can be known from the above analysis that △t = △t3-△t2. The frequency offset of the carrier signal relative to the energy storage signal is △f = △f2-△f1.

[0177] In some possible cases, the received signal is between the energy storage signal and the carrier signal, the UE sends the energy storage signal, then △t1, sends the R2D signal in another spectrum, and then △t2, sends the carrier signal in the same or different spectrum as the energy storage. Among them, the first information further includes: the frequency offset of the R2D signal relative to the energy storage signal, the frequency offset of the carrier signal relative to the energy storage signal or the R2D signal, △t1, △t2 and other parameters, which are all configured by the base station.

[0178] The above describes that in the RRC connected state of the UE, the base station sends the first information to the UE, and based on whether the energy storage signal and the carrier signal are the same signal, the base station configures the sending resource of the UE sending the energy storage signal / carrier signal, respectively.

[0179] For case 2, the UE is in RRC state switching, and the energy storage signal / carrier signal is sent to the AIoT terminal, so as to discuss the transmission resource reconfiguration of the energy storage signal / carrier signal. It is assumed that the maximum power of the UE that can transmit the energy storage signal is different in idle / inactive / connected states, and the transmission power of the energy storage signal is the lowest in the idle state, followed by the inactive state, and the connected state is the largest. The UE can transmit the energy storage signal, the carrier signal and the R2D signal in the original RRC state, or can switch the RRC state according to the demand (for example, the base station judges whether to switch after sending the RRC state switching request to the gNB), for example, the device capacitance size to be checked is larger, and the energy storage signal transmission power is required. The UE needs to switch from other RRC states to the connected state. Considering the influence of different UE RRC states on the UE transmitting the energy storage signal / carrier signal, the following will be discussed in detail. Please refer to FIG. 4c, which is a flowchart of another possible communication method provided by the embodiment of the present application, including at least one of the following steps:

[0180] 401. The base station and / or the UE receive the capability information sent by the AIoT terminal;

[0181] 402. The UE sends the RRC state switching request instruction to the base station according to the capability information;

[0182] 403. The base station determines the first information according to the capability information of the AIoT terminal and the RRC state switching request instruction;

[0183] 404. The base station sends the first information to the UE;

[0184] The UE receives the capability information reported by the AIoT terminal, which is similar to the capability information of the AIoT in the embodiment shown in FIG. 2a. The way in which the UE receives the capability information of the AIoT terminal is similar to the way in which the reader obtains the capability information of the AIoT terminal in the embodiment shown in FIG. 2a. Details are not repeated here.

[0185] The UE sends an RRC state switching request instruction to the base station according to the capability information of the AIoT terminal, to request switching from a current RRC state to a target RRC state. The RRC state switching request instruction is used for the UE to request the base station to reconfigure a sending resource for the UE to send a carrier signal, an energy harvesting signal, or an R2D signal. Specifically, the RRC state switching request instruction includes at least one of the following information: an RRC state switching requirement and a switching reason of an RRC connection state, wherein the RRC connection state includes at least one of the following states: RRC connection establishment, RRC connection reestablishment, RRC connection release, and RRC connection reconfiguration. Next, the corresponding RRC state switching request signaling and first information will be described based on various RRC state switching requested by the UE:

[0186] When the RRC state of the UE is switched from Connected to Inactive, the RRC state switching request signaling is used to request switching the RRC state to Inactive, and the RRC state switching request signaling includes auxiliary information of the UE, which includes a query of whether the switching requirement is met, and the first information is used to indicate whether the RRC state switching is confirmed.

[0187] When the RRC state of the UE is switched from Inactive to Connected, the RRC state switching request signaling is used to request switching the RRC state to Connected and to restore the RRC connection, and the RRC state switching request signaling includes a connection restoration reason, wherein the connection restoration reason can include, but is not limited to, information such as an energy harvesting signal of the AIoT terminal, an external carrier signal of the AIoT terminal, and an R2D signal of the AIoT terminal satisfying a preset condition. In addition, the first information is used to indicate whether the RRC connection is confirmed.

[0188] When the RRC state of the UE is switched from Connected to Idle, the RRC state switching request signaling is used to request releasing the RRC connection, and the RRC state switching request signaling includes a connection release reason, wherein the connection release reason can include, but is not limited to, information such as an energy harvesting signal of the AIoT terminal, an external carrier signal of the AIoT terminal, and an R2D signal of the AIoT terminal satisfying a preset condition. The first information is used to indicate whether the RRC release is confirmed.

[0189] When the RRC state of the UE is switched from Idle to Connected, the RRC state switching request signaling is used to request to establish or reestablish the RRC connection, and the RRC state switching request signaling includes a connection establishment cause or a connection reestablishment cause. The connection establishment cause or the connection reestablishment cause can include, but is not limited to, information such as an energy harvesting signal of the AIoT terminal, an external carrier signal of the AIoT terminal, and an R2D signal of the AIoT terminal satisfying a preset condition. The first information is used to indicate whether to confirm the establishment or reestablishment of the RRC connection.

[0190] When the RRC state of the UE is switched from Inactive to Idle, the RRC state switching request signaling is used to request to release the RRC connection, and the RRC state switching request signaling includes a connection release cause. The connection release cause can include, but is not limited to, information such as an energy harvesting signal of the AIoT terminal, an external carrier signal of the AIoT terminal, and an R2D signal of the AIoT terminal satisfying a preset condition. The first information is used to indicate whether to confirm the RRC release.

[0191] When the RRC state of the UE is switched from Idle to Inactive, the scenario is to be discussed.

[0192] The above can refer to Table 5 below, which includes the RRC switching of the UE, the RRC state switching request signaling, and the first information content.

[0193] Table 5

[0194] It should be noted that if the UE is in the RRC inactive state, the UE can be configured to transmit the CW without switching to the RRC connection. Moreover, before receiving the first information sent by the base station, the UE can still send the energy signal to the device based on the original RRC state.

[0195] The base station determines the first information according to the capability information of the AIoT terminal and the RRC state switching request, which is used to confirm whether to switch the RRC state of the UE. It should be noted that the base station obtains the capability information of the AIoT terminal in a manner similar to that of the reader in FIG. 2, and details are not repeated here.

[0196] The base station sends the first information to the UE, which is used to confirm whether to switch the RRC state.

[0197] It should be noted that in the embodiments of the present application, there are many factors for the base station to confirm whether to respond to the RRC state switching request sent by the UE, including confirming according to the known state of the AIoT terminal. For example, when the base station knows the state of the AIoT terminal, after the UE reports the RRC state switching request, the base station can determine whether to respond to the request of the UE according to the state of the AIoT terminal. For example, when the AIoT terminal is in the second state, if the UE requests to switch the RRC connection state from Connected to Idle, the base station can reject to release the RRC connection through the first information; if the UE requests to switch the RRC connection state from Inactive / Idle to Connected, the base station confirms the RRC connection / reestablishment through the first information; when the AIoT terminal is in the fourth state, if the UE requests to switch the RRC connection state from Connected to Idle, the base station confirms to release the RRC connection through the first information; if the UE requests to switch the RRC connection state from Inactive / Idle to Connected, the base station rejects the request through the first information.

[0198] 405. The UE sends third information to the base station;

[0199] 406. The base station sends fourth information to the UE;

[0200] 407. The UE sends carrier signals / energy storage signals / R2D signals based on the first information and the fourth information.

[0201] If the first information is used to indicate confirmation of the switching of the RRC state of the UE, the UE can optionally send third information to the base station, which is used to request resource reconfiguration, that is, the base station reconfigures the transmission resource of the UE, and the transmission resource includes the resource of the transmission of the carrier signal / energy storage signal / R2D signal. In response to the third information, the base station sends the fourth information, which is used for the UE to send the carrier signal / energy storage signal / R2D signal to the AIoT terminal.

[0202] It should be noted that the UE sends the carrier signal, the energy storage signal, or the R2D signal based on the reconfigured transmission resource, which can be sent independently or together, and when sent independently, the timing of each sending step is not limited, that is, the energy storage signal can be sent first, then the carrier signal, and then the R2D signal, or the carrier signal can be sent first, then the energy storage signal, and then the R2D signal. The specific application is not limited.

[0203] In summary, since the RRC state of different UEs affects the transmission power of the signal or the carrier signal, and further affects the charging and discharging of the AIoT terminal, resource configuration, etc., in the embodiments of the present application, the energy storage and resource coordination of the UE in multiple RRC connection states such as RRC connected / inactive / Idle state are specifically discussed, so that the communication process is more reliable and stable.

[0204] The communication method provided by the embodiment of the present application is applicable to various AIoT topologies. For example, in topology 1, the reader / writer and the intermediate node of the present application can be integrated into one device, such as a BS; in topology 2, the reader / writer and the intermediate node correspond to different devices, such as a base station for the reader / writer and a UE for the intermediate node.

[0205] In addition, the signal generation process of the R2D signal related to the present application includes CP processing. The reader / writer sends the R2D signal to the AIoT terminal, and the AIoT terminal can also perform CP processing, such as discarding the CP. For CP processing, the present application also provides a processing scheme. Including:

[0206] 1. Add a gap. In order to solve the interference problem of AIoT R2D signal transmission in a multipath environment, a CP can be added when generating the R2D signal. The reader / writer sends the R2D signal and adds the CP according to the definition rule, which includes any of the following:

[0207] For CP length greater than chip length: when the level of the CP is consistent with the level of the first chip or the last chip in the optical orthogonal frequency division multiplexing (OFDM) symbol, a time domain gap is added before or after the CP. As shown in FIG. 5a, 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. The length of the gap is determined by the sampling frequency offset (SFO) / carrier frequency offset (CFO), for example, 15KHz SCS, assuming a CP length of 5us, the symbol length is 66.7-5=61.7us. The sampling point is 1200, due to the existence of SFO, the actual sampling point is assumed to be 1080, the error is -120, corresponding to SFO of -10^5ppm, then the first node according to the estimated SFO value The gap size configured should be CP length+Tgap=5us, and the gap is configured at the end of the CP, and the Tgap is used to compensate for the sampling time domain offset introduced due to the influence of SFO; if the SFO is estimated to be 10^5ppm, then the actual sampling point number is 1320, at this time the CP length=5us+Tgap, that is, the gap is configured after the real 5us CP, and the Tgap is used to compensate for the sampling time domain offset introduced due to the influence of SFO.

[0208] For CP length less than chip length: When the CP level is the same as the first chip or the last chip in the OFDM symbol, add a time domain gap before or after the CP, the length of the gap is determined by SFO / CFO. The SFO / CFO is estimated by the reader according to the D2R signal, and the gap is used to compensate for the sampling time domain offset introduced due to the influence of SFO, as shown in Figure 5a.

[0209] 2. The CP is encoded linearly, and the CP length is greater than the chip length, for example, Manchester coding. If the CP is greater than one chip and less than or equal to two chips, and the CP modulated CP level is the same as the first chip and the last chip, considering the influence of SFO, the CP modulated level length + the first chip may be misjudged; if the CP is much greater than two chips, and the CP modulated CP level is the same as the first chip and the last chip, the CP modulated level length + the first chip is greater than two chips, and the device can correctly identify the CP; if the CP is greater than one chip and less than or equal to two chips, and the CP modulated CP level is different from the first chip and the last chip, since the length of the CP jump is less than one chip, the device may misjudge; if the CP is much greater than two chips, and the CP modulated CP level is different from the first chip and the last chip, since the length of the CP jump is greater than one chip, considering the influence of the SFO of the device, the device may misjudge. As shown in Figures 5b and 5c.

[0210] 3. In the prior art of NR or LTE, uplink / downlink signals are transmitted in OFDM symbol granularity, and the CP is inserted by inserting a part of the signal at the tail of the OFDM symbol into the front of the OFDM symbol. However, in the AIOT technology, the R2D signal can only occupy part of an OFDM symbol, i.e., not occupying the entire OFDM symbol, and the insertion of the CP needs to be defined by rules. Two ways are provided in the embodiments of the present application, including: way 1: when the R2D signal does not occupy the entire OFDM symbol, a part of the signal at the tail of the R2D signal is inserted into the front of the OFDM symbol, and the end position of the R2D signal can be at any position of the OFDM symbol, for example, at the middle position of the OFDM symbol, i.e., the effective R2D signal in the OFDM symbol is inserted into the front of the OFDM symbol; way 2: when the R2D signal does not occupy the entire OFDM symbol, a pre-defined sequence or a random sequence (this part of sequence is called pseudo-R2D signal) is inserted into the remaining position of the OFDM symbol, so that the OFDM symbol is occupied. When the CP is inserted, a part of the signal (pseudo-R2D signal) at the tail of the OFDM symbol is inserted into the front of the OFDM symbol. The AIoT terminal can not receive the pseudo-R2D signal in the OFDM symbol.

[0211] The flow of the communication method is described above, and the communication system provided by the embodiments of the present application will be introduced below. First, FIG. 6a is a schematic diagram of the communication system provided by the embodiments of the present application. As shown in FIG. 6a, the communication system includes a reader / writer and an AIoT terminal. The related functions of the reader / writer and the AIoT terminal involved in the embodiments of the present application can be implemented by the communication device 1400 in FIG. 6a. FIG. 6a is a structural schematic diagram of the communication device 1400 provided by the embodiments of the present application. The communication device 1400 includes one or more processors 1401, a communication line 1402, and at least one communication interface (only the communication interface 1404 is exemplarily shown in FIG. 6a, and one processor 1401 is taken as an example for description), and optionally further includes a memory 1403.

[0212] The processor 1401 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.

[0213] The communication line 1402 can include a channel for connecting different components.

[0214] The communication interface 1404 can be a transceiver module configured to communicate with other devices or communication networks, such as an Ethernet, a RAN, a wireless local area network (WLAN), etc. For example, the transceiver module can be a transceiver, a transceiver module, or the like. Alternatively, the communication interface 1404 can also be a transceiver circuit within the processor 1401 to realize the signal input and signal output of the processor.

[0215] The memory 1403 can be a device having 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, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this. The memory can exist independently and be connected to the processor through the communication line 1402. The memory can also be integrated with the processor.

[0216] The memory 1403 is configured to store computer-executable instructions for implementing the solutions of the present application, and the processor 1401 is configured to control the execution of the computer-executable instructions stored in the memory 1403. The processor 1401 is configured to execute the computer-executable instructions stored in the memory 1403, so as to implement the communication method provided in the embodiments of the present application.

[0217] Alternatively, in the embodiments of the present application, the processor 1401 can execute the processing-related functions in the communication method provided in the embodiments of the present application, and the communication interface 1404 is responsible for communication with other devices or communication networks, which is not limited in the embodiments of the present application.

[0218] Alternatively, in the embodiments of the present application, the computer-executable instructions can also be referred to as application program codes, which are not limited in the embodiments of the present application.

[0219] In a specific implementation, as an embodiment, the processor 1401 can include one or more CPUs, such as CPU0 and CPU1 in FIG. 6a.

[0220] In a particular implementation, as an example, the communication apparatus 1400 can include multiple processors, such as the processor 1407 and the processor 1401 in FIG. 6a. Each of these 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 calculations or processing.

[0221] In a particular implementation, as an example, the communication apparatus 1400 can further include an output device 1405 and an input device 1406. The output device 1405 is in communication with the processor 1401 and can display information in a variety of ways. For example, the output device 1405 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 1406 is in communication with the processor 1401 and can receive user input in a variety of ways. For example, the input device 1406 can be a mouse, a keyboard, a touch screen device, a sensor device, and the like.

[0222] The communication apparatus 1400 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 1400 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 terminal, an embedded device, or a device having a similar structure as shown in FIG. 6a. The embodiments of the present application do not limit the type of the communication apparatus 1400.

[0223] In addition, the constituent structure shown in FIG. 6a does not constitute a limitation on the communication apparatus, and the communication apparatus can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0224] It should be noted that the names of messages, the names of parameters, or the names of information between the network elements in the following embodiments of the present application are only examples, and other names can also be used in other embodiments. The communication method provided by the present application does not specifically limit this.

[0225] It can be understood that, in the embodiments of the present application, each network element can perform some or all of the steps in the embodiments of the present application. 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.

[0226] Referring to FIG. 6b, the storage of the wireless communication device in the embodiments of the present application is shown. The storage medium 20 of the wireless communication device in the embodiments of the present application stores instruction / program data 21, which, when executed, implements the method provided by any embodiment of the communication method of the present application and any non-conflicting combination. The instruction / program data 21 can form a program file and be stored in the above-mentioned storage medium 20 in the form of a software product, so that a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor executes all or part of the steps of the method of each embodiment of the present application. The aforementioned storage medium 20 includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, or a computer, a server, a mobile phone, a tablet, and other terminal devices.

[0227] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other manners. For example, the device embodiments described above are only schematic, and the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0228] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0229] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation based on the content of the present application and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

[0230] The above embodiments can be implemented by software, hardware (such as a circuit), firmware or any combination thereof, in whole or in part. When implemented by software, the above embodiments can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 by wired (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available medium collections. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium. The semiconductor medium can be a solid state disk.

[0231] It should be understood that the term "and / or" herein merely describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. In addition, the character " / " herein generally represents that the front and rear associated objects are in an "or" relationship, but can also represent an "and / or" relationship, which can be understood according to the context before and after.

[0232] In the present application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, 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.

[0233] It should be understood that the size of the sequence number of each process described above does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0234] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person 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.

[0235] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0236] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0237] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0238] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0239] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0240] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A communication method characterized by comprising: The application is applied to a reader-writer, comprising: sending the first information to an intermediate node, so that the intermediate node sends an energy storage signal and / or a carrier signal to an environmental AIoT terminal according to the first information. The method of claim 1, wherein The intermediate node includes but is not limited to at least one of the following: a dedicated carrier CW node, a relay, an integrated access backhaul IAB node, a user equipment UE and a repeater. The method according to claim 2, characterized in that The reader-writer and the intermediate node are integrated in one device, or the reader-writer and the intermediate node correspond to different devices respectively. The method according to claim 3, characterized in that The method further comprises: receiving the capability information of the AIoT terminal; determining the first information according to the capability information of the AIoT terminal, the first information being used for the intermediate node to determine the energy storage signal and / or the resource of the energy storage signal. The method according to claim 4, characterized in that The capability information of the AIoT terminal includes but is not limited to one or more of the following information: device type, capacitor size, power amplifier capability information, power state information. The method according to claim 5, characterized in that The device type includes but is not limited to one or more of the following types: AIoT terminal 1, AIoT terminal 2a, AIoT terminal 2b, AIoT terminal 3; the capacitor size is the maximum size for storing power; the power state information includes at least one of the following: no power, full power, N% of full power state, and the value of N ranges from 0 to 100. The method of claim 1, wherein The method further comprises: sending a first signal to the AIoT terminal, the first signal being a signal with a transmission direction from the reader-writer to the AIoT terminal; receiving a second signal sent by the AIoT terminal based on the carrier signal, the second signal being a signal with a transmission direction from the AIoT terminal to the reader-writer. The method of claim 7, wherein The first signal is used to select or activate the AIoT terminal, and / or the first signal is used to indicate the resource of the signal sent by the AIoT terminal, and / or the first signal is used to indicate the state of the AIoT terminal and / or the duration of the state. The method of claim 8, wherein In the communication method, at least one of the maximum processing time, the minimum processing time and the common processing time includes the state switching time of the AIoT terminal and / or the energy storage time of the AIoT terminal. The method of claim 9, wherein The minimum processing time includes but is not limited to at least one of the following: a minimum time interval T of the first signal and the corresponding second signal R2D_min , a minimum time interval T of the second signal and the corresponding first signal D2R_min , a minimum time interval T of two consecutive first signals R2D_R2D_min , the T R2D_R2D_min is greater than or equal to the energy storage time of the AIoT terminal, a minimum time interval T of two consecutive first signals D2R_D2R_min ; The maximum processing time includes, but is not limited to, at least one of: a maximum time interval T between the first signal and the corresponding second signal R2D_max a maximum time interval T between the second signal and the corresponding first signal D2R_max ; The common processing time is the processing time that meets all AIoT terminal types. The method of claim 10, wherein The state of the AIoT terminal includes a first state, a second state, a third state and a fourth state, the first state is an open state, the second state is a closed state, and the third state and the fourth state are sleep states. The method of claim 11, wherein The third state includes a semi-sleep state, and the fourth state includes a sleep state. When the AIoT terminal is in the third state, the AIoT terminal has the ability to receive and transmit part of the information, which includes but is not limited to at least one of the following: sending a D2R synchronization signal or receiving a R2D synchronization signal, reporting capability information, receiving a wake-up signal / activation signal. The method of claim 12, wherein When the AIoT terminal is in the first state, the method further comprises: The state switching indication information is used to indicate that the AIoT terminal switches from the first state to a target state, and the target state is at least one of the following: a second state, a third state, and a fourth state. The method of claim 13, wherein The state switching indication information includes, but is not limited to, at least one of the following information: a duration of the target state, and a state switching time. The method of claim 14, wherein The state switching time includes the T R2D_min . The method of claim 13, wherein The state switching indication information is sent to the AIoT terminal further includes: After receiving the state switching request information sent by the AIoT terminal, the state switching indication information is sent to the AIoT terminal; Or, The state switching indication information is sent to the AIoT terminal by a third signal; Or, After receiving the energy state information sent by the AIoT terminal, the state switching indication information is sent to the AIoT terminal. The method of claim 16, wherein The state switching indication information is also used to indicate that the AIoT terminal switches from the first state to the third state or the fourth state, and the state switching indication information includes a time domain offset between a first channel and a second channel, and the time domain offset is a duration of the third state or the fourth state. The method of claim 17, wherein The first channel is a channel for transmitting data or signals from the reader to the AIoT terminal, and the second channel is a channel for transmitting data or signals from the AIoT terminal to the reader. The method according to claim 4, characterized in that Before receiving the capability information of the AIoT terminal, the method further includes: The query indication information includes, but is not limited to, at least one of the following indications: a power state query indication and / or a remaining power query indication; The power state information sent by the AIoT terminal is received. The method of claim 19, wherein The power state query indication is used to query the AIoT terminal for at least one of the following information: remaining power, whether it is full, whether it reaches n% of the full state, whether it is lower than m% of the full state, and the m and n are predefined; The remaining power query indication is used to query the AIoT terminal for the remaining power. The method of claim 20, wherein After receiving the capability information of the AIoT terminal, the method further includes: Based on a priority inventory principle, the AIoT terminals in the coverage range are sorted in order of inventory priority from high to low to obtain a priority inventory sequence. The second information is sent to the AIoT terminal, and the second information is used to indicate the priority inventory sequence. The method of claim 21, wherein When the terminal device is inventoried, the AIoT terminal enters an ON state or an activated state; When the AIoT terminal is waiting for inventory, the AIoT terminal enters a sleep state or a closed state, and the fifth signal further includes a duration for maintaining the sleep state or the closed state. The method of claim 21, wherein The priority inventory principle includes, but is not limited to, at least one of the following principles: a far and near effect principle, an AIoT terminal type principle, a transmission block TBS size principle, a service type principle, and a service traffic principle. The method of claim 23, wherein In the far and near effect principle, the inventory priority is related to the distance from the AIoT terminal to the reader. In the device type principle, the inventory priority is related to the type of the AIoT terminal; In the TBS size principle, the inventory priority is related to the TBS size configured for the AIoT terminal; In the service type principle, the inventory priority is related to the type of the service corresponding to the AIoT terminal, and the type of the service at least includes an inventory service and a control service. In the service traffic principle, the inventory priority is related to the priority of the service corresponding to the AIoT terminal. The method of claim 19, wherein The query indication information is carried in R2D control signaling, a paging message, a listening signal, trigger information, or high-layer signaling mapped to a PRDCH. The method of claim 19, wherein The power state information is carried in second information, The second information is used by the reader to determine the power state of the AIoT terminal, and the second information includes but is not limited to one of the following information: user equipment assistance information (UAI) or D2R special information. The method of claim 26, wherein The D2R special information includes a preamble, a midamble, or a postamble of a D2R signal, which is used to implicitly represent the power state information of the AIoT terminal; or control signaling or data information carried by a second channel of the D2R signal, which carries the power state information of the AIoT terminal. The method of claim 27, wherein The UAI includes at least one of the following: passive trigger reporting indication and active trigger reporting indication. The method of claim 28, wherein The active trigger reporting indication includes but is not limited to the following trigger conditions: according to the write state of the device memory (devicememory), the power is full / reaches N% of the full power state, or according to the write state of the devicememory, the power is lower than Y% of the full power state, or the state of the AIoT terminal switches to a more active state, and N and Y are predefined; The time-frequency resource of the active trigger reporting is a predefined resource, or the resource of the previous round of inventory indication. The method according to claim 4, characterized in that The method further includes: sending a wake-up signal of a first power level to the AIoT terminal based on a predefined mapping relationship, the predefined mapping relationship being a mapping relationship between different transmission power levels of the wake-up signal and the power state of the AIoT terminal; If the ACK signal sent by the AIoT terminal is received, it is determined that the power state information of the AIoT terminal is in a full power state or exceeds N% of the full power state. The method according to claim 2, characterized in that When the intermediate node is a dedicated CW node, the first information is determined according to the capability information of the AIoT terminal, including: When the first trigger condition is met, the first information is determined according to the capability information of the AIoT terminal and the first auxiliary information, the first auxiliary information is sent by the AIoT terminal, and the first information is used to configure the information of the intermediate node to send the energy storage signal or the carrier signal. The method of claim 31, wherein The first auxiliary information includes but is not limited to at least one of the following information: power saving request information, power shortage reporting, full power state reporting, and communication state reporting. The method of claim 31, wherein The first trigger condition includes, but is not limited to, at least one of the following conditions: an interference measurement value is greater than a first threshold value, or, channel state information (CSI) of a channel between the reader / writer and the AIoT terminal is deteriorated and a difference value is greater than a second threshold value, wherein the interference measurement value is a measurement value of a corresponding interference signal when the intermediate node transmits the first information. The method of claim 31, wherein The first information includes at least one of the following information for the intermediate node to transmit an energy storage signal: an On-demand type indication, a periodic type indication, and a semi-persistent type indication. The method of claim 34, wherein The On-demand type indication is used to indicate different types of AIoT terminals, corresponding energy storage signal transmission power levels and energy storage time levels, or the On-demand type indication is used to indicate different types of communication state switching of AIoT terminals, corresponding energy storage signal transmission power levels and energy storage time levels. The method of claim 34, wherein The periodic type indication is used to indicate that the intermediate node periodically transmits the energy storage signal when a second trigger condition is met, and the second trigger condition includes, but is not limited to, at least one of the following conditions: all AIoT terminals in the coverage range are of the same type, the distances between the intermediate node and each AIoT terminal are the same, and the energy storage signal is periodically transmitted based on the charging periods of each service type. The method of claim 34, wherein The periodic type indication is also used to indicate that when the energy storage signal is periodically transmitted, the transmission period gradually decreases or increases, and the interval gap between different periods is related to the discharge time of the weakest AIoT terminal. The method of claim 34, wherein The semi-persistent type is used to indicate that the intermediate node continuously transmits a carrier signal as an energy storage signal after receiving the first information. The method of claim 31, wherein The first information also includes information for the intermediate node to transmit a carrier signal, If the carrier signal and the energy storage signal occupy the same resource block (RB), the first information includes the same frequency domain resource as the energy storage signal. If the carrier signal and the energy storage signal occupy different RBs, the first information includes at least one of the following information: transmission opportunity indication information, frequency domain resource indication information, and time domain resource indication information of the carrier signal. The method of claim 39, wherein The first information directly indicates the frequency domain resource of the carrier signal, or the first information includes a frequency domain offset of the carrier signal relative to the energy storage signal to indicate the frequency domain resource of the carrier signal. The method of claim 39, wherein The time domain resource indication information of the carrier signal includes a transmission start time of the carrier signal, and the indication mode of the transmission start time of the carrier signal in the first information includes, but is not limited to, at least one of the following: direct indication, indication of a time domain offset between the transmission start time of the carrier signal and the end time of the energy storage signal, indication of a time domain offset between the transmission start time of the carrier signal and the start time of the energy storage signal, indication of a time domain offset between the transmission start time of the carrier signal and the start time of an activation signal, and indication of communication state switching of the AIoT terminal. The method of claim 1, wherein The read-write device includes, but is not limited to, one or more of the following: an access network device, a relay, an integrated access backhaul node, a terminal device, or a transponder. The method of claim 42, wherein The read-write device is a base station, and the intermediate node is a user equipment (UE). The method of claim 43, wherein If the energy storage signal and the carrier signal occupy the same frequency domain resource, the first information includes: a frequency interval of a received signal, or a center frequency of the energy storage signal / carrier signal. If the energy storage signal and the carrier signal occupy different frequency domain resources, the first information includes: time-frequency resources respectively configured for the energy storage signal and the carrier signal. The method of claim 43, wherein If the energy storage signal and the carrier signal occupy the same frequency domain resource, the first information includes at least one of the following: a frequency interval of a received signal, a center frequency of the energy storage signal / carrier signal, and a time domain offset of the energy storage signal / carrier signal relative to the received signal. The method of claim 43, wherein When the first signal is between the energy storage signal and the carrier signal, the first information includes at least one of the following: a frequency domain offset of an R2D signal relative to the energy storage signal, a frequency domain offset of the carrier signal relative to the energy storage signal or the first signal, a time interval at which the UE transmits the energy storage signal and the first signal, and a time interval at which the UE transmits the first signal and the carrier signal. The method of claim 1, wherein Before the first information is sent to the intermediate node, the method further includes: Receiving an RRC state switching request instruction sent by the UE to request switching from a current RRC state to a target RRC state, the RRC state switching request further being used to request reconfiguration of a transmission resource, the transmission resource being used for the UE to transmit an energy storage signal / carrier signal / R2D signal, and the first information being used to indicate whether to confirm the RRC state switching request. The method of claim 47, wherein The RRC state includes: a connected state, an inactive state, and an idle state. The method of claim 48, wherein The RRC state switching request signaling includes, but is not limited to, at least one of the following information: an RRC state switching requirement and a switching reason of an RRC connection state, the RRC connection state including at least one of the following states: RRC connection establishment, RRC connection reestablishment, RRC connection release, and RRC connection reconfiguration. The method of claim 49, wherein When the RRC state switching request instruction is used to request switching from the connected state to the inactive state, the RRC state switching request instruction is used to request switching to the inactive state, the RRC state switching request signaling includes UAI of the UE, and the first information is used to indicate whether to confirm the RRC state switching. The method of claim 50, wherein The UAI of the UE includes a query as to whether a switching requirement is met. The method of claim 49, wherein When the RRC state switching request instruction is used to request switching from the inactive state to the connected state, the RRC state switching request instruction is used to request switching of the RRC state to the connected state and resuming of an RRC connection, the RRC state switching request instruction includes an RRC connection resumption reason, and the first information is used to indicate whether to confirm the RRC connection. The method of claim 49, wherein When the RRC state switching request instruction is used to request switching from the connected state to the idle state, the RRC state switching request is used to request releasing the RRC connection, the RRC state switching request instruction includes an RRC connection release reason, and the first information is used to indicate whether to confirm releasing the RRC connection. The method of claim 49, wherein When the RRC state switching request instruction is used to request switching from the idle state to the connected state, the RRC state switching request is used to request establishing or reestablishing the RRC connection, the RRC state switching request signaling includes a connection establishment reason or a connection reestablishment reason, and the first information is used to indicate whether to confirm establishing or reestablishing the RRC connection. The method of claim 49, wherein When the RRC state switching request instruction is used to request switching from the inactive state to the idle state, the RRC state switching request is used to request releasing the RRC connection, the RRC state switching request includes an RRC connection release reason, and the first information is used to indicate whether to confirm releasing the RRC connection. The method according to any one of claims 52 to 55, characterized in that The RRC connection recovery reason, the RRC connection release reason, the RRC connection establishment reason, the RRC connection reestablishment reason, and the RRC connection release reason include but are not limited to the following: an energy harvesting signal of the AIoT terminal, an external CW of the AIoT terminal, and an R2D signal of the AIoT terminal. The method of claim 56, wherein After the first information is sent to the CW node, the method further includes: If the UE switches the RRC state, receiving third information sent by the UE, the third information being used to request resource reconfiguration; Sending fourth information to the UE, the fourth information including time-frequency resources and transmission power of the reconfigured energy storage signal / carrier signal / R2D signal. A communication method applied to a side of an intermediate node, characterized in that, Including: Receiving first information sent by a reader-writer; Based on the first information, sending an energy storage signal and / or a carrier signal to the AIoT terminal. The method of claim 58, wherein The first information includes at least one of the following information for the intermediate node to send an energy storage signal: an On-demand type indication, a periodic type indication, and a semi-persistent type indication. The method of claim 59, wherein When the first information includes the On-demand type indication, the sending of the energy storage signal to the AIoT terminal based on the first information includes: According to the transmission power level and the energy storage time length level corresponding to the device type of the AIoT terminal, the energy storage signal is sent to the AIoT terminal; Or, According to the transmission power level and the energy storage time length level corresponding to the communication state switching of the AIoT terminal, the energy storage signal is sent to the AIoT terminal. The method of claim 59, wherein When the first information includes the periodic type indication, the sending of the energy storage signal to the AIoT terminal based on the first information includes: When all AIoT terminals in the coverage range are of the same type or the distance between the intermediate node and each AIoT terminal is the same, the energy storage signal is periodically sent to the AIoT terminals in the coverage range; Or, The energy storage signal is periodically sent to the AIoT terminal based on the charging period of each service type; Or, The energy storage signal is periodically transmitted to the AIoT terminal multiple times in a gradually decreasing or increasing manner according to a transmission period. The method of claim 59, wherein When the first information includes a semi-persistent type indication, the sending of the energy storage signal to the AIoT terminal based on the first information includes: Continuously sending a carrier signal to the AIoT terminal as the energy storage signal. The method of claim 58, wherein When the intermediate node is a UE, the method further includes: Receiving capability information sent by the AIoT terminal; Based on the capability information, sending an RRC state switching request instruction to the base station, the RRC state switching request instruction being used to request switching from a current RRC state to a target RRC state, and the RRC state switching request instruction also being used to request the base station to reconfigure a transmission resource; Determining whether to switch the RRC state according to the received first information; If it is determined to switch the RRC state, sending third information to the base station; Receiving fourth information sent by the base station, the fourth information being used for the UE to send the energy storage signal / the carrier signal / a first signal, the first signal being a signal whose transmission direction is from the reader / writer to the AIoT terminal; Based on the fourth information and the first information, sending the energy storage signal / the carrier signal / the first signal. A communication method applied to an AIoT terminal side, characterized in that, It includes: Sending capability information to a reader / writer and / or an intermediate node; Receiving an energy storage signal / carrier signal sent by an intermediate node. The method of claim 64, wherein The capability information includes but is not limited to one or more of the following information: device type, capacitor size, power amplifier capability information, and power state information. The method of claim 65, wherein The device type includes but is not limited to one or more of the following types: terminal device 1, terminal device 2a, terminal device 2b, and terminal device 3; the capacitor size is the maximum size for storing power; and the power state information includes at least one of the following: no power, full power, and N% of the full power state, where N ranges from 0 to 100. The method of claim 66, wherein The state of the AIoT terminal includes a first state, a second state, a third state, and a fourth state, the first state being an open state, the second state being a closed state, and the third state and the fourth state being sleep states. The method of claim 67, wherein When the AIoT terminal is in the third state, the AIoT terminal has the ability to receive and transmit part of the information. The method of claim 68, wherein When the AIoT terminal is in the second state, the AIoT terminal has at least one of the following behavioral capabilities: terminating or clearing a random access process or an inventory process, retaining code EPC of a non-volatile memory NVM, and retaining a power state of the NVM. The method of claim 69, wherein The termination or clearing of the random access process or the inventory process includes but is not limited to the following actions: clearing time / frequency domain resource information, clearing the content of AIoT paging information, clearing a current ID / group ID / random ID, and clearing scheduling information of an R2D message, the R2D message including a response message sent by the reader / writer to the AIoT in the random access process. The method of claim 68, wherein When the AIoT terminal is in the third state, the AIoT terminal has at least one of the following behavioral capabilities: sending a D2R synchronization signal or receiving an R2D synchronization signal, receiving a wake-up signal / activation signal, reporting capability information, suspending a random access process or an inventory process. The method of claim 71, wherein The suspension of the random access process or the inventory process includes, but is not limited to, the following actions: reserving time / frequency domain resource information, reserving AIoT paging information content, reserving current identification ID / group ID / random ID, and reserving R2D message scheduling information. The method of claim 68, wherein When the AIoT terminal is in the first state or the third state or the fourth state, before the method further includes: receiving first information sent by the reader, the first information being used to determine the capability information of the AIoT terminal. The method of claim 73, wherein The capability information is carried in second information, and the second information is used to determine the capability of the AIoT terminal, and the second information includes UAI information or D2R special information. The method of claim 74, wherein When the first information is used to determine the power state information of the AIoT terminal, the method further includes: When the AIoT terminal reaches full power or N% of the full power state, the power state information is sent to the reader based on a first preset time-frequency resource; or, When the AIoT terminal is lower than N% of the full power state, the power state information is sent to the reader based on a second preset time-frequency resource; or, When the AIoT terminal switches from the current state to a more active state, the power state information is sent to the reader based on a third preset time-frequency resource; Wherein, the first preset time-frequency resource, the second preset time-frequency resource and the third preset time-frequency resource are all predefined, or indicated by the previous round of inventory. The method of claim 68, wherein When the AIoT terminal is in the first state or the third state or the fourth state, the method further includes: receiving a first signal sent by the reader, the first signal being a signal transmitted from the reader to the AIoT terminal, and the first signal including an R2D signal; Based on the carrier signal, a corresponding second signal is sent, the second signal being a signal transmitted from the AIoT terminal to the reader, and the second signal including a D2R signal. The method of claim 76, wherein The first signal is used to select or activate the AIoT terminal, and / or the first signal is used to indicate the resource of the AIoT terminal for sending a signal, and / or the first signal is used to indicate the state of the AIoT terminal and / or the duration of the state after switching. The method of claim 68, wherein When the AIoT terminal is in the second state, the method further includes: When a preset condition is met, switching from the second state to another state, the preset condition including the power of the AIoT terminal reaching a preset value. The method of claim 78, wherein After the AIoT terminal switches from the second state to another state, the method further includes: After switching from the second state to the first state, if AIoT paging information is not received within a T1 time period, switching to the third state, and determining the time to switch to the first state again according to a single round of checking time, the T1 and the single round of checking time are predefined; Or, After switching from the second state to the third state, switching to the first state again according to the received synchronization signal and / or the wake-up signal; Or, after switching from the second state to the third state, if the synchronization signal and / or the wake-up signal is not received within a T3 time period, switching to the second state or the fourth state, the T3 is predefined or configured by the reader. The method of claim 68, wherein When the AIoT terminal is in the first state, the method further comprises: Requesting the reader to switch to a first target state; Receiving second information sent by the reader, the second information being used to indicate switching to the first target state, and the second information comprising a duration of the first target state; Or, Receiving third information sent by the reader, the third information being used to indicate switching to the first target state, and the third information comprising a duration of the first target state; After sending fourth information in response to the third information to the reader, switching to the first target state. The method of claim 68, wherein When the AIoT terminal is in the third state or the fourth state, the method further comprises: Switching to the first state when a preset condition is met, the preset condition comprising receiving a wake-up signal; Or, When the AIoT terminal is in the third state, performing signal transmission and reception at a specific time or in a specific time domain; Or, When the power of the AIoT terminal is lower than a threshold, switching from the third state to the fourth state or the second state. The method of claim 64, wherein The method further comprises: Receiving fifth information sent by the reader, the fifth information being used to indicate entering a checking sequence and switching to a second target state. The method of claim 82, wherein When the fifth information is also used to indicate to the AIoT terminal that it is prioritized for checking, the second target state is an ON state or an activated state. The method of claim 82, wherein When the fifth information is also used to indicate to the AIoT terminal that it is waiting for checking, the second target state is a hibernation state or an off state, and the fifth information further comprises a duration of the target state. The method of claim 84, wherein The method further comprises: Switching to the second target state; When the duration of the second target state is reached or a sixth information is received, switching to an ON state or an activated state, the sixth information comprising a wake-up signal. The method of claim 82, wherein The method further comprises: When a preset condition is met, sending seventh information to the reader to initiate a random access procedure with the reader, the preset condition comprising that the service corresponding to the AIoT terminal is a high-priority service. A communication device characterized by comprising: The communication device comprises a module for executing the method according to any one of claims 1 to 86. A wireless communication device comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and run the computer program stored in the memory to perform the method of any one of claims 1 to 86.

Images