Method of wireless communication and wireless communication device

Abstract

Embodiments of the present application provide a wireless communication method and wireless communication device. The wireless communication method is executed in a first communication device, and includes: receiving at least one synchronization information sent by a second communication device, wherein the at least one synchronization information is used to implement time-frequency synchronization of downlink or uplink, a bearing channel of the at least one synchronization information is a reader-to-device physical channel (PRDCH), a device-to-reader physical channel (PDRCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), or a physical uplink shared channel (PUSCH), and the at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

Description

Wireless communication method and wireless communication device Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and more particularly to a wireless communication method and a wireless communication device. Background Art

[0002] In the existing technology, due to the low stability of the crystal oscillator of the ambient Internet of Things AIOT device (device / environmental Internet of Things AIOT device (device / tag)), it is impossible to receive the synchronization signal block SSB like the new radio interface NR user equipment UE to achieve time and frequency synchronization of the transmission link. How to further study and discuss the physical layer signal design and channel design to achieve synchronization between the AIOT device and the reader is a key consideration. In addition, for low-power AIOT devices, there is currently no clear definition of how to define the signal processing time. Therefore, it is necessary to propose a wireless communication method and wireless communication device to improve the problems of the existing technology and other problems.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide a wireless communication method and a wireless communication device.

[0005] A wireless communication method provided by an embodiment of the present application is executed on a first communication device, including: receiving at least one synchronization information sent by a second communication device, wherein the at least one synchronization information is used to achieve downlink or uplink time and frequency synchronization, and the bearer channel of the at least one synchronization information is a physical channel PRDCH from a reader to a device, a physical channel PDRCH from a device to a reader, a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH, and the at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

[0006] Through the above technical solution, the first communication device receives at least one synchronization information sent by the second communication device. In this way, a synchronization signal design solution with different rates can be provided, which helps to improve communication performance.

[0007] A wireless communication method provided by an embodiment of the present application is executed on a first communication device, including: receiving a first signal sent by a second communication device, wherein the first signal is used for time-frequency synchronization of receiving or sending information by the first communication device, the first signal is an energy storage signal used for storing energy of the first communication device, or the first signal is an activation signal for activating an activation threshold of the first communication device, or the first signal includes a carrier signal.

[0008] Through the above technical solution, the first communication device receives the first signal sent by the second communication device. In this way, the energy storage signal or activation signal can be used as a synchronization signal, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0009] A wireless communication method provided by an embodiment of the present application is executed on a first communication device, including: achieving synchronization through a coding mechanism of a first signal, including aligning with the time-frequency resources of a new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal, wherein, when the first communication device detects the first signal configured by the second communication device, the first signal is aligned with the time-frequency resources of the new air interface signal, wherein the time-frequency resource alignment method includes a bit level or a time slot level.

[0010] The above technical solution achieves synchronization through the coding mechanism of the first signal, including aligning the time-frequency resources of the new air interface signal with those of the first signal by detecting the change amount and / or change trend and / or code rate of the first signal. This allows for self-synchronization based on the coding mechanism and other mechanisms, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0011] A wireless communication method provided by an embodiment of the present application is executed on a first communication device, including: receiving at least one information sent by a second communication device, wherein the at least one information includes a selection signal or a paging signal, or the carrying channel of the at least one information is a PRDCH or PDRCH or a control channel or a data channel.

[0012] With the above technical solution, the at least one message includes a selection signal or a paging signal, or the bearer channel of the at least one message is a PRDCH, PDRCH, control channel, or data channel. This provides a signal design / channel design solution that helps improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0013] A wireless communication method provided in an embodiment of the present application is executed on a first communication device, including: receiving information sent by a second communication device, wherein the information indicates a first communication device that needs to be repeatedly counted, a first communication device that needs to avoid repeated inventory, or an operation during inventory of multiple first communication devices.

[0014] Through the above technical solution, the information indicates the first communication device that needs to be re-inventored, the first communication device that needs to avoid re-inventoring, or the operation to be performed during the inventory of multiple first communication devices. This provides a solution to the problem of re-inventoring, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0015] A wireless communication method provided by an embodiment of the present application is executed on a second communication device, including: sending at least one synchronization information to a first communication device, wherein the at least one synchronization information is used to achieve downlink or uplink time and frequency synchronization, and the bearer channel of the at least one synchronization information is a physical channel PRDCH from a reader to a device, a physical channel PDRCH from a device to a reader, a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH, and the at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

[0016] Through the above technical solution, the second communication device sends at least one synchronization message to the first communication device. In this way, a synchronization signal design solution with different rates can be provided, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0017] A wireless communication method provided by an embodiment of the present application is executed on a second communication device, including: sending a first signal to a first communication device, wherein the first signal is used for time-frequency synchronization of receiving or sending information by the first communication device, the first signal is an energy storage signal used for storing energy of the first communication device, or the first signal is an activation signal for activating an activation threshold of the first communication device, or the first signal includes a carrier signal.

[0018] Through the above technical solution, the second communication device sends the first signal to the first communication device. In this way, the energy storage signal or activation signal can be used as a synchronization signal, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0019] A wireless communication method provided by an embodiment of the present application is executed on a second communication device, including: configuring a first signal to the first communication device, achieving synchronization through the coding mechanism of the first signal, including aligning the time-frequency resources with the new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal, wherein the time-frequency resource alignment method includes bit level or time slot level.

[0020] The above technical solution achieves synchronization through the coding mechanism of the first signal, including aligning the time-frequency resources of the new air interface signal with those of the first signal by detecting the change amount and / or change trend and / or code rate of the first signal. This allows for self-synchronization based on the coding mechanism and other mechanisms, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0021] A wireless communication method provided by an embodiment of the present application is executed on a second communication device, including: sending at least one information to a first communication device, wherein the at least one information includes a selection signal or a paging signal, or the carrying channel of the at least one information is a PRDCH or PDRCH or a control channel or a data channel.

[0022] With the above technical solution, the at least one message includes a selection signal or a paging signal, or the bearer channel of the at least one message is a PRDCH, PDRCH, control channel, or data channel. This provides a signal design / channel design solution that helps improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0023] A wireless communication method provided by an embodiment of the present application is executed on a second communication device, including: sending information to a first communication device, wherein the information indicates a first communication device that needs to be repeatedly inventoried, a first communication device that needs to avoid repeated inventory, or an operation when multiple first communication devices are inventoried.

[0024] Through the above technical solution, the information indicates the first communication device that needs to be re-inventored, the first communication device that needs to avoid re-inventoring, or the operation to be performed during the inventory of multiple first communication devices. This provides a solution to the problem of re-inventoring, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0025] A wireless communication method provided in an embodiment of the present application includes: sending or receiving data and / or signaling within a predefined first processing time, second processing time, third processing time, or fourth processing time, wherein: the first processing time refers to the processing time between R2D signal transmission or activation signal transmission from a reader to a device and D2R signal transmission from a device to a reader; the second processing time refers to the processing time between the D2R signal transmission and the R2D signal transmission or the activation signal transmission; the third processing time refers to the processing time between two different consecutive R2D signal transmissions or two different consecutive activation signal transmissions to the same AIOT device; and the fourth processing time refers to the processing time between two different consecutive D2R signal transmissions from the same AIOT device.

[0026] The above technical solution allows data and / or signaling to be sent or received within the predefined first processing time, second processing time, third processing time, or fourth processing time, thereby improving communication performance, increasing inventory efficiency, and reducing signaling overhead.

[0027] A wireless communication device provided in an embodiment of the present application includes: a processor and a memory, the memory being used to store a computer program, and the processor being used to call and run the computer program stored in the memory to execute the above-mentioned wireless communication method.

[0028] The embodiment of the present application provides an AIOT device, comprising a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0029] The reader / writer provided in an embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0030] The user equipment provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0031] The base station provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0032] The network element provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the above-mentioned wireless communication method.

[0033] The chip provided in the embodiment of the present application is used to implement the above-mentioned wireless communication method.

[0034] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned wireless communication method.

[0035] The computer-readable storage medium provided in an embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned wireless communication method.

[0036] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned wireless communication method.

[0037] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned method for wireless communication.

[0038] In the above technical solution, the second communication device sends at least one synchronization message to the first communication device. This provides a design solution for synchronization signals with different rates, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. The second communication device sends a first signal to the first communication device. In this way, a storage signal or an activation signal can be used as the synchronization signal, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. Synchronization is achieved through the coding mechanism of the first signal, including aligning the time-frequency resources of the new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal. In this way, self-synchronization can be achieved based on the coding mechanism and other mechanisms, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. The at least one message includes a selection signal or a paging signal, or the channel carrying the at least one message is a PRDCH, PDRCH, control channel, or data channel. This provides a signal / channel design solution, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. The message indicates the first communication device that needs to be repeatedly inventoried, the first communication device that needs to avoid repeated inventories, or the operation of the inventory of multiple first communication devices. This provides a solution to duplicate inventory issues, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. Data and / or signaling are sent or received within a predefined first processing time, second processing time, third processing time, or fourth processing time. This helps improve communication performance, increase inventory efficiency, and reduce signaling overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0040] FIG1A is a schematic diagram of a wireless communication system architecture provided in an embodiment of the present application;

[0041] FIG1B is a schematic diagram of a wireless communication system architecture provided in an embodiment of the present application;

[0042] FIG2A is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0043] FIG2B is a schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0044] FIG2C is a schematic diagram of a synchronization signal design provided in an embodiment of the present application;

[0045] FIG2D is a schematic diagram of a synchronization signal design provided in an embodiment of the present application;

[0046] FIG2E is a schematic diagram of a synchronization signal design provided in an embodiment of the present application;

[0047] FIG3A is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0048] FIG3B is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0049] FIG3C is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0050] FIG3D is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0051] FIG3E is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0052] FIG4A is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0053] FIG4B is a schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0054] FIG4C is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0055] FIG4D is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0056] FIG4E is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0057] FIG4F is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0058] FIG5A is a schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0059] FIG5B is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0060] FIG5C is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0061] FIG5D is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0062] FIG5E is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0063] FIG6A is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0064] FIG6B is a schematic flow chart of a wireless communication method according to an embodiment of the present application;

[0065] FIG6C is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0066] FIG6D is a schematic diagram of a signal configuration method provided in an embodiment of the present application;

[0067] FIG7A is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0068] FIG7B is a schematic diagram of a second signal processing method according to an embodiment of the present application;

[0069] FIG7C is a schematic diagram of a fourth signal processing method according to an embodiment of the present application;

[0070] FIG8 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application;

[0071] FIG9 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0072] FIG10 is a schematic block diagram of a wireless communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0073] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0074] The technical solutions of the embodiments of the present application can be applied to various wireless communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, 5G communication system or future wireless communication systems, etc.

[0075] Exemplarily, a wireless communication system 100A used in an embodiment of the present application is shown in FIG1A . The wireless communication system 100 may include a first communication device 110, and the first communication device 110 may be a device that communicates with a second communication device (base station 130). The first communication device 110 is an environmental Internet of Things (AIOT) device. The second communication device may be a reader / writer. Optionally, the reader / writer may be a base station 130. Optionally, the base station 130 may be an evolved base station (eNB or eNodeB) in an LTE system, or the base station 130 may be a mobile switching center, a relay station, an access point, an on-board device, a wearable device, a hub, a switch, a bridge, a router, a network device in a 5G network, or a base station in a future communication system. In the topology of the AIOT system shown in FIG1A , the second communication device (base station 130) is directly connected to the first communication device 110 (AIOT device), and the carrier CW and downlink control information are sent by the second communication device (base station 130), or the carrier CW is sent by a third-party node. The backscattered signal is received by the same second communication device (base station 130 ), which needs to have duplex capability.

[0076] Exemplarily, the wireless communication system 100 used in the embodiment of the present application is shown in FIG1B . The wireless communication system 100B may include a first communication device 110, and the first communication device 110 may be a device that communicates with a second communication device (user device 120). The first communication device 110 is an environmental Internet of Things (AIOT) device. The second communication device may be a reader / writer. Optionally, the reader / writer may be a user device 120. In the topology of the AIOT system shown in FIG1B , the second communication device (user device 120) is directly connected to the first communication device 110 (AIOT device) for uplink and downlink communication.

[0077] As used herein, "user equipment" includes, but is not limited to, a device configured to receive / send communication signals via a wired connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another user equipment; and / or an Internet of Things (IoT) device. A user equipment configured to communicate via a wireless interface may be referred to as a "wireless communication second communication device," a "wireless second communication device," or a "mobile second communication device." Examples of mobile second communication devices include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) second communication devices that can combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that can include radiotelephones, pagers, Internet / Intranet access, web browsers, organizers, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. User equipment can refer to access second communication devices, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, remote user equipment, mobile devices, wireless communication devices, or user agents. The access second communication device can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a user device in a 5G network, or a user device in a future evolved PLMN, etc.

[0078] Some embodiments of this application relate to technologies related to signal and channel design for the ambient Internet of Things (AIOT). Some embodiments of this application are applicable to systems such as NR, 6G, WiFi, and RFID. Based on the capabilities of different devices and different application scenarios in the AIOT system, synchronization and activation signals suitable for the AIOT system are designed, and the design of selection signals, paging signals, and delimiter signals is considered.

[0079] In some embodiments of the present application, the first communication device 110 receives at least one synchronization information sent by the second communication device. In this way, a synchronization signal design scheme with different rates can be provided, which helps to improve communication performance, improve inventory efficiency, and reduce signaling overhead. In some embodiments of the present application, synchronization is achieved through the coding mechanism of the first signal, including aligning the time and frequency resources of the new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal. In this way, self-synchronization can be achieved according to a coding mechanism or other mechanism, which helps to improve communication performance, improve inventory efficiency, and reduce signaling overhead.

[0080] In some embodiments of the present application, a first communications device 110 receives at least one message sent by a second communications device. The at least one message includes a selection signal or a paging signal, or the bearer channel for the at least one message is a PRDCH, PDRCH, control channel, or data channel. This can provide a signal / channel design solution, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. In some embodiments of the present application, the first communications device 110 receives information sent by a second communications device. The information indicates a first communications device that requires repeated inventory, a first communications device that requires repeated inventory avoidance, or operations for multiple first communications devices during inventory. This can provide a solution to addressing repeated inventory issues, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead. In some embodiments of the present application, data and / or signaling are sent or received within a predefined first processing time, second processing time, third processing time, or fourth processing time. This can limit the sending and receiving time. This can help improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0081] Optionally, the second communication devices may perform device-to-device (D2D) communication.

[0082] Optionally, the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0083] The wireless communication system 100 further includes a base station 130. Optionally, the base station 130 may be an evolved Node B (eNB or eNodeB) in an LTE system, or the base station 130 may be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network device in a 5G network, or a base station in a future communication system.

[0084] Figure 1 exemplarily shows a first communication device 110 and a second communication device (two user devices 120 or base stations 130). Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of user devices within its coverage area, which is not limited in the embodiments of the present application.

[0085] Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and a network element, which is not limited in this embodiment of the present application. For example, the base station 130 may include other network entities such as a network controller, a mobility management entity, and a network element, which is not limited in this embodiment of the present application.

[0086] It should be understood that in the embodiments of the present application, a device having a wireless communication function in a network / system may be referred to as a wireless communication device. Taking the wireless communication system 100 shown in Figure 1 as an example, the wireless communication device may include a first communication device 110 and a second communication device (user equipment 120 or base station 130) having a communication function. The first communication device 110 and the second communication device 120 may be the specific devices described above and will not be described in detail here. The wireless communication device may also include other devices (base station 130) in the wireless communication system 100. For example, the base station 130 may include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0087] It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the objects associated before and after are in an "or" relationship. In some embodiments, the term "configuration" may refer to "pre-configuration" and "network configuration". The terms "definition" or "pre-definition" in the embodiments of the present application can be implemented by pre-storing corresponding codes, tables or other methods of indicating relevant information in devices (for example, including UE and network devices). This application does not limit the specific implementation methods. For example, "definition" or "pre-definition" may refer to those defined in the protocol. It should also be understood that the "protocol" in the present invention may refer to a standard protocol in the field of communications, for example, it may include the Long Term Evolution (LTE) protocol, the New Air Interface / New Radio (NR) protocol, and related protocols used in future communication systems. This application is not limited to this.

[0088] Some embodiments of this application mainly solve the following technical problems:

[0089] 1. Synchronization Signal: Due to the low stability of crystal oscillators in AIOT devices (devices / tags), they cannot receive synchronization signal blocks (SSBs) to achieve time and frequency synchronization of the transmission link like traditional NR user equipment (UE). In conjunction with the solution disclosed in RAN1#116, further design of uplink and downlink synchronization signals to achieve synchronization between AIOT devices and readers is a key consideration.

[0090] a) Technical Issue 1: Due to the varying capabilities of AIOT devices (devices / tags) (device 1, device 2a, and device 2b), they support varying sampling rates. For example, device 1 may support only a single-bit analog-to-digital converter (ADC) or no ADC at all, while device 2 may support a multi-bit ADC. This results in different data rates / chip rates for control signaling or data sent by the reader / writer. Therefore, synchronization signals must be designed to accommodate devices of varying capabilities to meet AIOT communication requirements.

[0091] b) Technical Issue 2: Current solutions for achieving synchronization through energy storage signals / activation signals do not disclose the impact of sampling frequency offset (SFO) on synchronization performance, nor do they consider the impact of the carrier CW transmission period on synchronization signal design. Currently, for AIOT devices (devices / tags) with near-far effects, the disclosed solutions configure the switch ON-OFF state periodically. Therefore, this solution considers the periodic / non-periodic, static / semi-static / dynamic configuration of energy storage signals / activation signals, as well as the synchronization signal design for the carrier CW signal.

[0092] c) Technical Issue 3: Synchronization via preambles requires additional signaling overhead and cannot maintain signal synchronization, requiring an additional midamble. Therefore, it is crucial to consider how to achieve self-synchronization in the absence of synchronization signals (such as preambles), tailored to the capabilities of IoT devices (devices / tags) in different environments. Furthermore, the conditions under which self-synchronization is required, i.e., the threshold for loss of synchronization, also need to be defined.

[0093] 2. Activation Signal: This signal activates the demodulation circuits of device 1 and device 2a. Its energy must exceed the activation threshold (e.g., -20dBm). However, various signal types, including delimeters, preambles, control messages, inner carrier CW, and outer carrier CW, can be used as activation signals, and there is currently no clear conclusion. Designing the activation signal is a key consideration for AIOT systems.

[0094] a) Technical Issue 4: Non-carrier CW as an activation signal. Traditional delimeters are all low and cannot be used as activation signals. When using a preamble or other control signal as an activation signal, the timing, duration, and waveform characteristics of the activation signal must be considered. Furthermore, for Topology 2, the timing of the UE's activation signal transmission must also be considered.

[0095] b) Technical Issue 5: Carrier CW as an activation signal. Carrier CW is divided into energy storage carrier CW and backscatter carrier CW. When using carrier CWs with different functions as activation signals, it is necessary to consider the modulation method, waveform characteristics, and configuration method (periodic activation, aperiodic activation) of the carrier CW as an activation signal. This ensures that the carrier CW energy storage / backscattering functions are guaranteed while activating the demodulation circuit with maximum efficiency.

[0096] c) Technical Issue 6: When an AIOT device (device / tag) runs low on power to maintain operations such as communication and demodulation, it may enter a dormant state. Considering how and when to reactivate the device / tag is crucial.

[0097] 3. Technical Issue 7: Traditional selection / paging signals are used to select one / a group of environmental IoT AIOT devices (device / tags) to complete subsequent inventory, activation / deactivation and other services. However, the selection / paging function can also be carried through information such as queries, preambles, and control messages; similarly, the synchronization information of queries and preambles, and control messages can also be carried through the physical channel PRDCH from the reader to the device. Similarly, the physical channel PDRCH from the device to the reader also has similar problems. Therefore, it is necessary to design a channel structure suitable for environmental IoT AIOT devices (device / tags) with different capabilities to adapt to different needs.

[0098] 4. Technical Issue 8: Duplicate Inventory Issues. In business scenarios such as factory assembly lines and goods in and out of warehouses, dense deployment of readers and writers may cause previously inventoried AIOT devices (devices / tags) to be counted repeatedly, or the same reader and writer may need to count previously counted AIOT devices (devices / tags) at different time periods. Furthermore, for Topology 2, when multiple UEs are counting multiple AIOT devices (devices / tags) indoors, identifying the optimal UE for inventory is a consideration.

[0099] 5. Technical Issue 9: Mapping between chip rate and BLF (reverse link frequency). The definitions of chip data / data rate for on-off keying OOK-1 and on-off keying OOK-4 are different. Considering that different devices may support different sampling rates, the downlink chip rate / data rate has a mapping relationship. Correspondingly, the uplink modulation rate (or BLF) of devices with different capabilities is also different and has a mapping relationship. Therefore, how to implicitly indicate the BLF through the downlink chip rate / data rate needs to be considered.

[0100] 6. Technical Issue 10: Time Intervals. Unlike NR mechanisms, AIoT channel design is relatively simple due to the limitations of AIOT devices / tags. Therefore, the definition mechanism for time intervals between different processing flows also differs. Time intervals such as the response time of AIOT devices / tags, the response time of readers / writers, and the minimum time interval between different inventory processes require redesign and definition.

[0101] 7. Technical Issue 11: Multiple Access. Slotted Aloha, the basic access mechanism for multi-environmental IoT (AIOT) devices (devices / tags), does not address collision handling for these devices (devices / tags) during the inventory process. Traditional collision resolution methods include binary trees and fallback mechanisms. Further consideration is needed to resolve collisions using mechanisms such as frequency division multiplexing (FDM) and mode multiplexing.

[0102] 8. In addition, there is currently no clear definition of how to define signal processing time for low-power AIOT devices.

[0103] In response to the above-mentioned technical problems, some embodiments of the present application solve the above-mentioned technical problems from the following aspects:

[0104] Based on the capabilities of different devices and different application scenarios in the Ambient IoT system, design synchronization signals and activation signals suitable for the AIOT system, and consider the design of select / paging and delimeters.

[0105] Synchronization signal: Design schemes for synchronization signals at different rates, design schemes using energy storage signals or activation signals as synchronization signals, and self-synchronization schemes.

[0106] Activation signal: non-carrier CW as activation signal, carrier CW as activation signal, UE auxiliary information UAI assisted activation.

[0107] Design of select / paging and delimeter.

[0108] Issues related to duplicate inventory: Provide solutions to avoid duplicate inventory, transmission solutions for inventorying IoT AIOT devices (device / tag) in the inventory environment, and multi-UE inventory transmission solutions.

[0109] Design of signal processing time.

[0110] To facilitate understanding of the technical solutions of the embodiments of the present application, the following describes the technical solutions related to the embodiments of the present application. The following lists the technical solutions of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the ninth embodiment for illustration, but the present application is not limited thereto.

[0111] First embodiment: Design of synchronization signals at different rates:

[0112] In some embodiments of the present application, the solution of the first embodiment may be implemented in conjunction with the solution of the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and / or the ninth embodiment, or may be implemented independently of the solution of the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0113] FIG2A is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG2A , the wireless communication method is executed on a first communication device and includes at least one of the following operations: Operation 201A: Receive at least one synchronization information sent by a second communication device. The at least one synchronization information is used to achieve downlink or uplink time-frequency synchronization, and the bearer channel of the at least one synchronization information is a physical channel PRDCH from a reader to a device, a physical channel PDRCH from a device to a reader, a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH. The at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

[0114] Through the above technical solution, the first communication device receives at least one synchronization information sent by the second communication device. In this way, a synchronization signal design solution with different rates can be provided, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0115] FIG2B is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG2B , the wireless communication method is executed on a second communication device and includes at least one of the following operations: Operation 201B: Send at least one synchronization information to the first communication device. The at least one synchronization information is used to achieve downlink or uplink time-frequency synchronization, and the bearer channel of the at least one synchronization information is a physical channel PRDCH from the reader to the device, a physical channel PDRCH from the device to the reader, a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH. The at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

[0116] Through the above technical solution, the second communication device sends at least one synchronization message to the first communication device. In this way, a synchronization signal design solution with different rates can be provided, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0117] In some embodiments, the first communication device is an AIOT device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment. In some embodiments, the at least one low-rate synchronization message includes synchronization information of different rate levels. In some embodiments, the at least one high-rate synchronization message includes synchronization information of different rate levels. In some embodiments, the frame structure of the at least one synchronization information includes any one of the following: a first synchronization information; the first synchronization information and at least one control information; the first synchronization information and at least one data information; the first synchronization information, the at least one control information and the at least one data information; multiple first synchronization information; multiple first synchronization information and the at least one control information; the multiple first synchronization information and the at least one data information; the multiple first synchronization information, the at least one control information and at least one data information; a second synchronization information; the second synchronization information and the at least one control information; the second synchronization information and the at least one data information; the second synchronization information, the at least one control information and at least one data information; multiple second synchronization information; multiple second synchronization information and the at least one control information; the multiple second synchronization information and the at least one data information; the multiple second synchronization information, the at least one control information and the at least one data information; the at least one first synchronization information and the at least one second synchronization information, and the at least one control information and / or the at least one data information.

[0118] In some embodiments, the frame structure of the at least one synchronization information further includes activation information, delimiter, or terminator indication information. In some embodiments, the first synchronization information indicates the timing, time interval, time offset, number of repetitions, or frequency information of the subsequent first synchronization information; or each synchronization information indicates the timing, time interval, time offset, number of repetitions, or frequency information of the subsequent adjacent synchronization information. In some embodiments, the at least one first synchronization information or the at least one second synchronization information indicates the time-frequency resources of the at least one control information and / or the at least one data information, and the time-frequency resources include time domain resources and frequency domain resources for carrying uplink or downlink control information, or time domain resources and frequency domain resources for carrying uplink or downlink data information; wherein the time domain resources of the uplink data information include the sending timing of the uplink data information, the time interval or time offset relative to the at least one first synchronization information or the at least one second synchronization information; the frequency domain resources of the uplink data information include the code rate or backscatter link frequency of the uplink data information.

[0119] In some embodiments, the at least one synchronization information is periodically configured, aperiodically configured, or pre-configured. In some embodiments, in a piece of information, the configuration of the at least one synchronization information is periodically configured. In some embodiments, the piece of information includes radio resource control (RRC) signaling or media access control (MAC) control element (CE) signaling. In some embodiments, in a piece of information, the configuration of the at least one synchronization information is aperiodically configured. In some embodiments, in a piece of information, the aperiodic configuration of the at least one synchronization information means that the aperiodic configuration is dynamically indicated by the second communication device through the at least one synchronization information. In some embodiments, the modulation mode of the at least one synchronization information that is periodically configured is based on orthogonal frequency division multiplexing on-off keying (OFDM-OOK) modulation, frequency shift keying (FSK) modulation, single-carrier SC-OFDM modulation, or single-tone OOK modulation. In some embodiments, the OFDM-OOK-based modulation includes OFDM-OOK-1 modulation, OFDM-OOK-2 modulation, OFDM-OOK-3 modulation, or OFDM-OOK-4 modulation.

[0120] Specifically, in some embodiments, the first communication device is, for example, the first communication device 110 shown in FIG. 1 .

[0121] For example, in some embodiments of the present application, a synchronization signal design scheme is considered for adapting to different capability environments of IoT devices (device / tag) (device 1, device 2a, device 2b). In the synchronization signal design schematic provided, as shown in Figure 2C, the starting dashed box represents a delimeter or activation signal, and the ending dashed box represents end-of-line indication information. These are optional signal structures.

[0122] Low chip / data rate sync signal (LCR / LDR sync signal): The LCR is used to achieve downlink or uplink time synchronization and / or frequency synchronization, and its bearer channel can be any of the following: PRDCH, PDRCH, PDCCH, PDSCH, PUCCH, PUSCH; Modulation mode: 1) on-off keying OFDM-OOK-1 or OOK-2 or OOK-3 or OOK-4 based on orthogonal frequency division multiplexing, or FSK, or SC-OFDM; 2) single-tone based OOK modulation, or FSK.

[0123] Single LCR:

[0124] Frame structure:

[0125] LCR: Only LCR is sent, mainly applicable to the activation of ambient IoT AIOT devices (devices / tags). When the ambient IoT AIOT device (device / tag) receives the LCR signal and meets the activation threshold, the demodulation and modulation circuits of the ambient IoT AIOT device (device / tag) can be activated.

[0126] LCR+control information: When the reader does not need to send additional data to the environmental Internet of Things AIOT device (device / tag), and only needs to send control information to schedule the time and frequency resources for the environmental Internet of Things AIOT device (device / tag) to send data, LCR+control information can be sent; or, when the environmental Internet of Things AIOT device (device / tag) does not need to send additional data to the reader, and only needs to send control information to schedule the time and frequency resources for the environmental Internet of Things AIOT device (device / tag) to send data, only LCR+control information can be sent; or information such as selection / paging, query, query rep, RN16 (RN8), and reply are included in the control information.

[0127] LCR+data information: When the data information carries control signaling, the LCR+data information can be sent directly; or, information such as selection / paging, query, queryrep, RN16 (RN8), and reply can be included in the data information.

[0128] LCR+control information+data information:

[0129] Configuration method:

[0130] Periodic Configuration: In the business process, LCR needs to be sent before each uplink or downlink data is sent. For example, LCR configuration is periodic in different messages. For example, when the reader sends downlink messages continuously, LCR is configured only in the first message, not in the second message, and LCR is configured again in the third message.

[0131] Aperiodic configuration: During the business process, whether to configure LCR is determined based on business volume, business cycle, and energy storage status. For example, during inventory, the LCR is sent before the select signal is sent, but it is not required when sending a query. When sending an ACK (including RN16) again, the LCR is sent before the ACK.

[0132] Multi-LCR:

[0133] Frame structure:

[0134] LCR+control information+LCR+control information.

[0135] LCR+data information+LCR+data information.

[0136] LCR+control information+data information+LCR+control information+data information.

[0137] Instruction method:

[0138] The first LCR indicates the occasion, time interval, number of repetitions, frequency information, etc. of the subsequent LCRs.

[0139] Each LCR indicates the occasion, time interval, number of repetitions, frequency information, etc. of the subsequent adjacent LCRs.

[0140] Configuration method:

[0141] Periodic configuration: The LCR configuration in one message is periodic.

[0142] Aperiodic configuration: The LCR is configured aperiodically in a message, for example, based on the length of each data message sent.

[0143] High chip / data rate sync signal (HCR / HDR sync signal): The HCR is used to achieve downlink or uplink time synchronization and / or frequency synchronization, and its bearer channel can be any of the following: PRDCH, PDRCH, PDCCH, PDSCH, PUCCH, PUSCH; Modulation mode: 1) OFDM-based OOK-1 or OOK-2 or OOK-3 or OOK-4, or FSK, or SC-OFDM; 2) single-tone based OOK modulation, or FSK.

[0144] Single HCR:

[0145] Frame structure:

[0146] HCR: Only HCR is sent, mainly applicable to the activation of ambient IoT AIOT devices (devices / tags). When the ambient IoT AIOT device (device / tag) receives the HCR signal and meets the activation threshold, the demodulation and modulation circuits of the ambient IoT AIOT device (device / tag) can be activated.

[0147] HCR+ control information: When the reader does not need to send additional data to the environmental Internet of Things AIOT device (device / tag), and only needs to send control information to schedule the time and frequency resources for the environmental Internet of Things AIOT device (device / tag) to send data, HCR+ control information can be sent; or, when the environmental Internet of Things AIOT device (device / tag) does not need to send additional data to the reader, and only needs to send control information to schedule the time and frequency resources for the environmental Internet of Things AIOT device (device / tag) to send data, only HCR+ control information can be sent; or information such as selection / paging, query, queryrep, RN16 (RN8), and reply is included in the control information.

[0148] HCR+data information: When the data information carries control signaling, the HCR+data information can be sent directly; or, information such as selection / paging, query, queryrep, RN16 (RN8), and reply can be included in the data information.

[0149] HCR+control information+data information:

[0150] Configuration method:

[0151] Periodic configuration: In the business process, HCR needs to be sent before each uplink or downlink data is sent. For example, HCR configuration is periodic in different messages. For example, when the reader sends downlink messages continuously, HCR is configured only in the first message, not in the second message, and HCR is configured again in the third message.

[0152] Aperiodic configuration: During the business process, whether HCR needs to be configured is determined based on business volume, business cycle, and energy storage status. For example, during inventory, HCR is sent before sending a select, but not when sending a query. When sending an ACK (including RN16) again, HCR is sent before the ACK.

[0153] For example, in some embodiments of the present application, a synchronization signal design scheme is considered for adapting to different IoT devices (devices / tags) (device 1, device 2a, device 2b) in different capability environments. In the synchronization signal design schematic provided, as shown in Figure 2D, the starting dashed box represents a delimeter or activation signal, and the ending dashed box represents the end indicator information. These are optional signal structures.

[0154] Multi-HCR:

[0155] Frame structure:

[0156] HCR+control information+HCR+control information.

[0157] HCR+data information+HCR+data information.

[0158] HCR+control information+data information+HCR+control information+data information.

[0159] Instruction method:

[0160] The first HCR indicates the occasion, time interval, number of repetitions, frequency information, etc. of the subsequent HCR. The indication information is sent by the reader based on the capability information, channel conditions, energy storage information, etc. of the AIOT device (device / tag) in the environment, or is predefined.

[0161] Each HCR indicates the occasion, time interval, number of repetitions, frequency information, etc. of the subsequent adjacent HLR. The indication information is sent by the reader based on the capability information, channel conditions, energy storage information, etc. of the ambient IoT device (device / tag), or is predefined.

[0162] The transmission time interval, repetition times, and frequency information of the HCR are pre-configured.

[0163] Configuration method:

[0164] Periodic configuration: The configuration of HCR in one message is periodic configuration.

[0165] Aperiodic configuration: The configuration of HCR in a message is aperiodic configuration, for example, it is configured according to the length of each data message sent.

[0166] LCR+HCR: When the rate in a message is variable, or when switching from LCR to HCR is required due to insufficient power during communication, the rate switching of the synchronization message can be performed according to the above switching conditions. The LCR+HCR is used to achieve downlink or uplink time synchronization and / or frequency synchronization, and its bearer channel can be any of the following: PRDCH, PDRCH, PDCCH, PDSCH, PUCCH, PUSCH; Modulation mode: 1) OOK-1 or OOK-2 or OOK-3 or OOK-4 based on OFDM, or FSK, or SC-O FDM; 2) OOK based on single tone, or FSK.

[0167] For example, in some embodiments of the present application, a synchronization signal design scheme is considered for adapting to different capability environments of IoT devices (device / tag) (device 1, device 2a, device 2b). In the synchronization signal design schematic provided, as shown in Figure 2E, the starting dashed box represents a delimeter or activation signal, and the ending dashed box represents the end indicator information. These are optional signal structures.

[0168] Frame structure:

[0169] LCR+control information or data information+HCR+control information or data information.

[0170] HCR+control information or data information+LCR+control information or data information.

[0171] It is important to note that if the LCR / HCR is not sent for a period of time after sending, the control information or data information may be out of sync. When the reader detects that the ambient IoT device (device / tag) is out of sync (for example, it is not receiving the backscatter signal correctly), it will readjust the LCR / HCR transmission period.

[0172] It's worth noting that if DFT-S-OFDM is used to generate the HCP (e.g., OOK4) and CP-OFDM is used to generate the LCP (e.g., OOK 1), the base station can support symbol-level or slot-level switching between the HCP and LCP. Alternatively, DFT-S-OFDM can be used to generate the LCP, treating the LCP as a special case of the HCP.

[0173] Instruction method:

[0174] The first LCR / HCR indicates the occasion, time interval, number of repetitions, frequency information, etc. of the subsequent LCR / HCR. The indication information is sent by the reader based on the capability information, channel conditions, energy storage information, etc. of the environmental IoT device (device / tag), or is predefined.

[0175] Each LCR / HCR indicates the occasion, time interval, number of repetitions, frequency information, etc. of the subsequent adjacent LCR / HCR. The indication information is sent by the reader based on the capability information, channel conditions, energy storage information, etc. of the environmental IoT device (device / tag), or is predefined.

[0176] The transmission time interval (time interval), number of repetitions, and frequency information of LCR / HCR other than the first LCR / HCR are indicated by control information, and the control information includes RDCI (reader-writer TO environmental Internet of Things AIOT device (device / tag) control information) or DRCI (environmental Internet of Things AIOT device (device / tag) to reader-writer control information) applicable to Ambient IoT; it can also be MAC CE signaling, mapped to PRDCH or PDRCH, or PDCCH / PDSCH / PUCCH / PUSCH in the form of MAC PDU.

[0177] The transmission time interval, repetition times, and frequency information of the LCR / HCR are pre-configured.

[0178] It is worth noting that when multiple LCRs or HCRs are configured, it can be called an LCR / HCR midamble or LCR / HCR postamble. The LCR or HCR can indicate the time-frequency resources of control information and data information. For uplink, it can also indicate the transmission occasion of uplink control information or data information.

[0179] Second embodiment: energy storage signal or activation signal as synchronization signal:

[0180] In some embodiments of the present application, the solution of the second embodiment may be implemented in conjunction with the solution of the first embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and / or the ninth embodiment, or may be implemented independently of the solution of the first embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0181] FIG3A is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG3A , the wireless communication method, executed on a first communication device, includes at least one of the following operations: Operation 301A: Receive a first signal sent by a second communication device. The first signal is used for time-frequency synchronization of information received or transmitted by the first communication device, the first signal is an energy storage signal used to store energy for the first communication device, or the first signal is an activation signal used to activate an activation threshold of the first communication device, or the first signal includes a carrier signal.

[0182] Through the above technical solution, the first communication device receives the first signal sent by the second communication device. In this way, the energy storage signal or activation signal can be used as a synchronization signal, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0183] FIG3B is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG3B , the wireless communication method, executed on a second communication device, includes at least one of the following operations: Operation 301B: Sending a first signal to a first communication device. The first signal is used for time-frequency synchronization of information received or transmitted by the first communication device, the first signal is an energy storage signal for storing energy for the first communication device, or the first signal is an activation signal for activating an activation threshold of the first communication device, or the first signal includes a carrier signal.

[0184] Through the above technical solution, the second communication device sends the first signal to the first communication device. In this way, the energy storage signal or activation signal can be used as a synchronization signal, which helps to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0185] In some embodiments of the present application, the first communication device is an ambient Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment. In some embodiments of the present application, when the reference signal received power (RSRP) of the first signal is greater than the activation threshold or greater than X dB of the activation threshold, the energy storage signal or the activation signal serves as a synchronization signal, where X is greater than 0. In some embodiments of the present application, the carrier signal is a waveform that has undergone periodic or non-periodic modulation or coding. In some embodiments of the present application, the carrier signal is transmitted within a fixed time period, or the carrier signal is transmitted at a fixed frequency position, or the time-frequency resources of the carrier signal are pre-configured, indicated by the first communication device, or indicated by the second communication device, and the time-frequency resources include time domain resources and frequency domain resources; wherein the time domain resources include the transmission timing of the carrier signal, the time interval or time offset relative to the first signal; and the frequency domain resources include the code rate of the carrier signal or the backscatter link frequency.

[0186] In some embodiments of the present application, the first signal is periodically configured, non-periodically configured, statically configured, semi-statically configured, or dynamically configured. In some embodiments of the present application, when the first signal is periodically configured, the period of the first signal is a first time interval or a second time interval, and the second time interval is related to the first time interval and the time offset. In some embodiments of the present application, when the first signal is non-periodically configured, the time interval between the subsequent first signal and the first signal at the previous moment is indicated by the first signal at the previous moment, so that the first communication device completes demodulation or transmission, or, the timing of sending the subsequent first signal is indicated by the first signal at the first moment, so that the first communication device completes demodulation or transmission.

[0187] In some embodiments of the present application, the first signal is statically, semi-statically, or dynamically configured via signaling, where the signaling includes indication information defined by a core network (CN), a MAC CE, an activation signal, a select signal, a paging signal, control information, or data information. In some embodiments of the present application, the activation signal is a select signal, a paging signal, a delimiter signal, a preamble signal, a control message signal, or a data message signal.

[0188] Exemplarily, in some embodiments of the present application, the periodic / non-periodic configuration, static / semi-static / dynamic configuration of the energy storage signal / activation signal, and the synchronization signal for the carrier CW (carrier wave) signal are considered. The reader sends a first signal for energy storage of the environmental Internet of Things AIOT device (device / tag) or activation of the demodulation circuit threshold of the environmental Internet of Things AIOT device (device / tag), and the first signal is used for time-frequency synchronization of the environmental Internet of Things AIOT device (device / tag) receiving or sending information. Or the reader sends a first signal for time-frequency synchronization of the environmental Internet of Things AIOT device (device / tag) receiving or sending information, and the first signal includes a carrier CW signal.

[0189] The first signal carrier CW is defined as the threshold for the synchronization signal, that is, only when the RSRP of the first signal is greater than the activation threshold (for example, the demodulation circuit threshold) or greater than X dB of the activation threshold (for example, the demodulation circuit threshold), the first signal can be used as the synchronization signal for downlink or uplink synchronization.

[0190] Exemplarily, in some embodiments of the present application, the energy storage signal or activation signal can be defined as follows: 1. For environmental Internet of Things AIOT devices (device / tag) with different capabilities, the energy storage capacity is determined, and the charging time (charging time) is affected by the distance between the environmental Internet of Things AIOT device (device / tag) and the reader / writer. Therefore, different energy storage time levels can be defined for environmental Internet of Things AIOT devices (device / tag) with different device capabilities. The reader / writer performs downlink control signaling, data and uplink backscatter signaling, signal scheduling, and resource allocation according to this level; 2. The charging time (charging time) of the environmental Internet of Things AIOT device (device / tag) is determined, that is, it is assumed that the environmental Internet of Things AIOT device (device / tag) can communicate after storing energy within the specified time.

[0191] When the first signal is a carrier CW and the carrier CW is not used as an energy storage signal or an activation signal, synchronization can be achieved through the following information of the carrier CW.

[0192] Coding and modulation:

[0193] The CW carrier wave is a waveform that has undergone periodic or aperiodic modulation or encoding. For example, OOK modulation is performed within a fixed time period, and AIOT devices (devices / tags) are synchronized based on the rising or falling edges. This includes OOK, PSK, FSK, Manchester, FM0, Miller, and PIE.

[0194] Carrier CW time-frequency resources: Time domain: Carrier CW is transmitted within a fixed time period. This carrier CW can be used as a synchronization signal or as a carrier signal for a synchronization signal + backscatter signal. Frequency domain: Carrier CW is transmitted at a fixed frequency position. This carrier CW can be used as a synchronization signal or as a carrier signal for a synchronization signal + backscatter signal.

[0195] Exemplarily, in some embodiments of the present application, if the carrier CW is sent by a third-party node (non-reader / gNB / UE), the time-frequency resources of the carrier CW are configured in at least one of the following ways: the third time-frequency resources are pre-configured, the third time-frequency resources are indicated by the gNB, and the third time-frequency resources are indicated by the UE.

[0196] Configuration method: periodic configuration.

[0197] The impact of the cumulative time offset TO needs to be considered. Specifically, as shown in Figure 3C, the first signal is sent at time t1, and after a time interval of T, the first signal is sent at time t2; after a time interval of T±△t, the first signal is sent at time t3; after a time interval of T±△t, the first information is sent at time t4. The △t is the impact of the cumulative time offset TO. Before each first signal is sent, the time offset is corrected through the capability information reported by the AIOT device (device / tag). This value can be a fixed value or a range.

[0198] Without considering the cumulative impact of the sampling frequency offset SFO (sampling frequency offset), as shown in FIG3D , a first signal is sent every T time interval. The time interval may be predefined. The configuration of △t needs to be determined based on the capability information about the sampling frequency offset SFO reported by the AIOT device (device / tag) of the environmental Internet of Things, or the reader obtains the range of the sampling frequency offset SFO through the transmission and reception of multiple signals. For example, the maximum sampling frequency offset SFO is 10^5ppm, which means that a time offset TO of 1ms will be generated every 10ms, with an FO of 5%-22%. In this case, the setting of △t is based on (0, 1ms) and is considered in combination with the control signaling or data signal length.

[0199] Aperiodic configuration: A previous first signal indicates the time interval between a subsequent first signal and the previous first signal, allowing the AIOT device (device / tag) to complete demodulation or transmission. For example, after the first signal indicates a time interval of T at time t1, it arrives at time t2; after the first signal indicates a time interval of T-Δt at time t2, it arrives at time t3.

[0200] Alternatively, the first signal may indicate at time t1 the timing for subsequent first signal transmission, so that the AIOT device (device / tag) can complete demodulation or transmission. For example, as shown in FIG3E , the first signal at time t1 indicates the arrival of the first signal at times t2, t3, and t4, respectively, after time intervals of T, T-Δt, and T+2Δt, respectively.

[0201] Static configuration / dynamic configuration / semi-static configuration:

[0202] Static configuration: During the channel coherence time or a fixed time, or when the ambient IoT device (device / tag) remains stationary within the coverage area, the reader can send the first signal through static configuration. Indication methods include: CN-defined indication methods, MAC CE, activation signal, selection / paging, control information, data information, etc. For example, the first signal can be sent periodically or aperiodically within a fixed time period.

[0203] Semi-static configuration: If the power level of an AIOT device (device / tag) is insufficient to support subsequent communications, if a high-data-rate service is required, or if an AIOT device (device / tag) is moving slowly within the coverage area, the first signal configuration period can be adjusted semi-statically. Indication methods include CN-defined indication methods, MAC CE, activation signals, selection / paging, control information, and data information.

[0204] Dynamic configuration: When channel fading changes rapidly or the number of AIOT devices (devices / tags) counted increases within a fixed timeframe, consider dynamically configuring the primary signal to adapt to changes in the channel or count frequency. Indication methods include: CN-defined indication methods, MAC CE, activation signals, select / paging, control information, and data information.

[0205] Third embodiment: self-synchronization solution

[0206] In some embodiments of the present application, the solution of the third embodiment may be implemented in conjunction with the solution of the first embodiment, the second embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and / or the ninth embodiment, or may be implemented independently of the solution of the first embodiment, the second embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0207] FIG4A is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG4A , the wireless communication method is executed on a first communication device and includes at least one of the following operations: Operation 401A: Achieve synchronization through a coding mechanism of a first signal, including aligning the time-frequency resources of a new air interface signal with the time-frequency resources of a new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal. When the first communication device detects the first signal configured by the second communication device, the first signal is aligned with the time-frequency resources of the new air interface signal, and the time-frequency resource alignment method includes a bit level or a time slot level.

[0208] The above technical solution achieves synchronization through the coding mechanism of the first signal, including aligning the time-frequency resources of the new air interface signal with those of the first signal by detecting the change amount and / or change trend and / or code rate of the first signal. This allows for self-synchronization based on the coding mechanism and other mechanisms, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0209] FIG4B is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG4B , the wireless communication method, executed on a second communication device, includes at least one of the following operations: Operation 40BA: configuring a first signal to the first communication device, achieving synchronization through a coding mechanism of the first signal, including aligning the time-frequency resources of the new air interface signal with the time-frequency resources of the new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal. The time-frequency resource alignment method includes bit level or time slot level.

[0210] The above technical solution achieves synchronization through the coding mechanism of the first signal, including aligning the time-frequency resources of the new air interface signal with those of the first signal by detecting the change amount and / or change trend and / or code rate of the first signal. This allows for self-synchronization based on the coding mechanism and other mechanisms, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0211] In some embodiments of the present application, the first communication device is an AIOT device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or user equipment. In some embodiments of the present application, the first signal transmits data bits to be transmitted. In some embodiments of the present application, the change amount or change trend of the demodulated first signal is linearly encoded. In some embodiments of the present application, the first signal includes code rate information, sequence information, or duty cycle information used for periodic synchronization. In some embodiments of the present application, the wireless communication method further includes receiving first information, the first information being used to indicate the code rate information, sequence information, or duty cycle information used for periodic synchronization in the first signal. In some embodiments of the present application, when the first communication device or the second communication device detects a fixed code rate, the first signal is aligned with the time-frequency resources of the new air interface signal. In some embodiments of the present application, when the first communication device continuously detects multiple changes or multiple change trends of the first signal, the first signal is aligned with the time-frequency resources of the new air interface signal.

[0212] In some embodiments of the present application, the first signal includes code rate information, sequence information, or duty cycle information for non-periodic synchronization. In some embodiments of the present application, the wireless communication method further includes receiving second information, wherein the second information is used to indicate the code rate information, sequence information, or duty cycle information used for non-periodic synchronization in the first signal. In some embodiments of the present application, when the first communication device detects multiple changes or multiple change trends of the first signal within a fixed time, the first signal is aligned with the time-frequency resources of the new air interface signal. In some embodiments of the present application, when the first communication device continuously detects a predefined energy, the first signal is aligned with the time-frequency resources of the new air interface signal; or when the first communication device detects a predefined energy within a fixed time, the first signal is aligned with the time-frequency resources of the new air interface signal.

[0213] Exemplarily, in some embodiments of the present application, how to achieve self-synchronization based on a coding mechanism or other mechanisms when there is no synchronization signal is considered. Synchronization is achieved through a coding mechanism of control information. Synchronization is achieved through a coding mechanism, mainly by detecting the amount of change and the trend of change of the rising edge or the falling edge. When the environmental Internet of Things AIOT device (device / tag) detects the configured first signal (for example, a self-synchronization signal), time domain alignment with the NR symbol (symbol) / time slot (slot) is achieved. Among them, the configured self-synchronization signal can transmit data bits (bits) or control information for transmission. This patent only defines different schemes for self-synchronization signals. These schemes can be indicated by activation signals / delimiters (delimeters) or other signals, or they can be predefined.

[0214] Coding method. Linear codes with rising and falling edges after demodulation can be selected as a self-synchronization scheme. These linear codes include Manchester codes, FM0 codes, Miller codes, and PIE codes. Different subcarrier coefficients in Miller codes represent different code rates; higher subcarrier coefficients indicate higher data rates.

[0215] Configuration method:

[0216] Periodic synchronization: The reader sends information such as the code rate, sequence, and duty cycle to the AIOT device (device / tag) for periodic synchronization.

[0217] Setting the synchronization code rate to achieve synchronization: When the AIOT device (device / tag) or reader detects a fixed code rate, time-frequency synchronization is achieved. For example, as shown in Figure 4C, when the AIOT device (device / tag) detects a sequence with a 1 / 4 code rate, it will determine that the sequence is a synchronization sequence. The synchronization code rate is pre-configured or carried by an activation signal, delimeter, paging / select signal, etc. The synchronization code rate can also be called the synchronization data rate or the synchronization chip rate.

[0218] Set continuous 0 or continuous 1 to achieve synchronization. When the environmental IoT AIOT device (device / tag) or reader detects multiple consecutive 0s or multiple consecutive 1s, time and frequency synchronization is achieved.

[0219] FM0: According to the coding rules, bit 0 transitions from high to low within one chip duration, and the phase of the first half cycle is opposite to the phase of the second half cycle of the previous bit. Bit 1 does not transition within one duration, and the phase of the first half cycle is opposite to the phase of the second half cycle of the previous bit.

[0220] If multiple rising edges and falling edges are detected continuously, or multiple bits (bits) 0 are detected continuously, for example, as shown in FIG4D , four consecutive 0s are detected, it is determined to be a synchronization signal.

[0221] If multiple rising edges and falling edges are detected continuously, or multiple bits (bit) 1 are detected continuously, it is considered a synchronization signal.

[0222] Miller: According to the coding rules, bit 0 does not undergo a level transition within one chip duration, and the phase of the first half cycle is the same as the second half cycle of the previous bit. Bit 1 undergoes a level transition within one chip duration, and the phase of the first half cycle is the same as the second half cycle of the previous bit.

[0223] If multiple rising edges and falling edges are detected continuously, or multiple bits (bit) 0 are detected continuously, for example, if 4 consecutive 0s are detected, it is considered to be a synchronization signal of N 0s, where N is a positive integer greater than or equal to 1.

[0224] If multiple rising edges and falling edges are detected continuously, or multiple bits (bit) 1 are detected continuously, it is considered a synchronization signal.

[0225] When a bit data corresponding to a subcarrier coefficient that is different from the previous and next bit data is detected, synchronization is determined. For example, as shown in Figure 4E, the subcarrier coefficient of the transmitted control information or data bit is 2, and the subcarrier coefficient of the synchronization sequence is 4.

[0226] Due to the influence of the sampling frequency offset (SFO) and demodulation capability of ambient IoT AIOT devices (devices / tags), detection ambiguity may occur during AIOT device detection, resulting in a decrease in self-synchronization capability. In this case, time domain resources can be used to increase the reliability of self-synchronization detection. For example, repeating the self-synchronization sequence or increasing the self-synchronization period can be used.

[0227] Manchester encoding: The encoding method is the same as FM0, and the rules are similar. When acting as a proxy, the rules of FM0 can be repeated.

[0228] PIE encoding: According to the encoding rules, the high-level duration of bit 1 is greater than the high-level duration of bit 0. For example, the high-level and low-level durations of bit 0 are equal, and the high-level duration of bit 1 is 3 times that of bit 0.

[0229] If multiple rising edges and falling edges are detected continuously within the same time, or multiple bits (bit) 0 are detected continuously, for example, 4 consecutive 0s are detected, it is determined to be a synchronization signal. If the detected energy increases significantly within the same time, or multiple bits (bit) 1 are detected continuously, as shown in Figure 4F, it is determined to be a synchronization signal.

[0230] A fixed duty cycle is set to achieve synchronization. When the ambient IoT AIOT device (device / tag) or reader detects the fixed duty cycle, time and frequency synchronization is achieved.

[0231] Aperiodic synchronization: The reader sends information such as bit rate, sequence, and duty cycle to the AIOT device (device / tag) for aperiodic synchronization.

[0232] Synchronization method:

[0233] Rising / falling edge synchronization:

[0234] Synchronization is achieved when N rising edges are detected within a fixed time using a modulation method or a defined coding rule (as shown above). Synchronization is achieved when N falling edges are detected within a fixed time using a modulation method or a defined coding rule (as shown above).

[0235] Energy Synchronization:

[0236] Synchronization is achieved when a predefined amount of energy is detected continuously. Synchronization is achieved when a predefined amount of energy is detected within a fixed time.

[0237] Fourth embodiment: non-carrier CW signal as activation signal:

[0238] In some embodiments of the present application, the solution of the fourth embodiment may be implemented in conjunction with the solution of the first embodiment, the second embodiment, the third embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and / or the ninth embodiment, or may be implemented independently of the solution of the first embodiment, the second embodiment, the third embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0239] For example, in some embodiments of the present application, the present solution considers signals such as select / paging, delimeter, preamble, control message, and data message as design solutions for activation signals.

[0240] Select or paging is used as an activation signal. In addition to selecting and grouping AIOT devices (devices / tags), selection / paging can also serve as an activation signal. The reader / writer sends a first message to the device. The RSRP of the first message reaching the AIOT device (device / tag) is greater than the activation threshold, and the first message contains at least one or more high levels.

[0241] Device 1: The RSRP 1 of the first information arriving at the AIOT device (device / tag) is greater than the activation threshold N1.

[0242] Device 2a: The RSRP 2a of the AIOT device (device / tag) to which the first information arrives is greater than the activation threshold N2a.

[0243] Device 2b: The RSRP 2b of the AIOT device (device / tag) to which the first message arrives is greater than the activation threshold N2b.

[0244] Device 3: The RSRP 3 of the first information arriving at the AIOT device (device / tag) is greater than the activation threshold N3.

[0245] Configuration method:

[0246] Periodic configuration: For example, each time a selection or paging operation occurs, it can be used as an activation signal.

[0247] Non-periodic configuration: For example, it is used as an activation signal only during the first round of inventory. When re-inventorying the environmental IoT AIOT devices (device / tag) that have already been inventoried, select and paging are not used as activation signals, and RSRP does not need to be greater than the activation threshold.

[0248] Delimeter as activation signal: In addition to indicating the starting position of downlink information transmission, the delimeter can also be used as an activation signal.

[0249] An all-1 sequence, for example, a traditional all-0 sequence is modified into an all-1 sequence as an activation signal, and a high-level threshold is greater than an activation threshold.

[0250] Alternatively, at least the first bit is at a high level, and a threshold of the high level is greater than an activation threshold.

[0251] Configuration method:

[0252] Periodic configuration: For example, the reader sends a delimeter each time before sending a preamble, control information, or data information:

[0253] Aperiodic configuration: For example, the reader only carries a delimeter for activating the signal at the beginning when sending a signal to the AIOT device (device / tag) for the first time.

[0254] The preamble, control message, and data message serve as activation signals.

[0255] When there is no delimeter before the preamble and no additional activation signal, the preamble serves as an activation signal, and at least the first bit of information must be high, and the high-level threshold must be greater than the activation threshold. If the reader only sends a control message or data message on the PRDCH, the control message or data message can be used as an activation signal, and at least the first bit of information must be high, and the high-level threshold must be greater than the activation threshold. For topology 2, when the UE sends an activation signal and the activation signal is a non-carrier CW signal:

[0256] The timing (occasion) of activating the signal is configured by the base station through the uu port or is predefined.

[0257] The activation signal period is configured by the base station through the uu port or is predefined.

[0258] The amplitude of the activation signal is configured by the base station through the uu port or is predefined.

[0259] Fifth embodiment: Carrier CW is used as activation signal:

[0260] In some embodiments of the present application, the solution of the fifth embodiment may be implemented in conjunction with the solution of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and / or the ninth embodiment, or may be implemented independently of the solution of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0261] For example, in some embodiments of the present application, this solution considers a design scheme in which a carrier CW is used as an activation signal, including an inner carrier CW and an outer carrier CW of topology 1 and topology 2. The reader sends a carrier CW to the AIOT device (device / tag), and the carrier CW is used to activate the demodulation circuit of the AIOT device (device / tag). The RSRP of the carrier CW received by the AIOT device (device / tag) must be greater than the demodulation circuit threshold:

[0262] As in 1), the transmitting device of the carrier CW includes at least any one of the following:

[0263] The gNB sends a carrier CW to the ambient Internet of Things (AIOT) device (device / tag) on ​​the first time-frequency resource. The carrier CW is used to activate the demodulation circuit of the ambient Internet of Things (AIOT) device (device / tag).

[0264] UE, the UE sends a carrier CW to the ambient Internet of Things AIOT device (device / tag) on ​​the second time-frequency resource, and the carrier CW is used to activate the demodulation circuit of the ambient Internet of Things AIOT device (device / tag).

[0265] The second time-frequency resource is preconfigured.

[0266] The second time-frequency resource is indicated by the gNB.

[0267] The third-party node sends a carrier CW to the ambient Internet of Things AIOT device (device / tag) on ​​the third time-frequency resource. The carrier CW is used to activate the demodulation circuit of the ambient Internet of Things AIOT device (device / tag).

[0268] The third time-frequency resource is preconfigured.

[0269] The third time-frequency resource is indicated by the gNB.

[0270] The third time-frequency resource is indicated by the UE.

[0271] As in 2), the configuration information of the first, second, and third time-frequency resources includes at least any one of the following:

[0272] Time domain information, that is, configuring the carrier CW as the sending time, sending cycle or sending interval of the activation signal.

[0273] When the carrier CW needs to be repeatedly sent as an activation signal, the time domain information of the repeated transmission of the carrier CW may be an offset relative to a previous transmission time, or a fixed transmission interval.

[0274] It is bound to other signaling, that is, before sending each selection / paging / query / delimeter / preamble / control message / data message, a carrier CW with circuit activation function is sent.

[0275] Frequency domain information, that is, the chip rate, data rate or frequency domain resource of the configured carrier CW as the activation signal.

[0276] As shown in 3), the first, second and third time-frequency resources are related to the modulation / coding method.

[0277] The uncoded carrier CW is the carrier CW that is not coded or modulated.

[0278] The modulated and coded carrier CW, wherein the modulated and coded carrier CW serving as the activation signal has at least a first bit (bit) having a first level that is a high level. OOK / PSK / FSK.

[0279] Linear encoding: PIE, FM0, Manchester, Miller.

[0280] As in 1)-4), the carrier CW used for the activation signal may have the following functions:

[0281] The carrier CW used for the energy storage signal is also used to activate the circuit of the ambient Internet of Things AIOT device (device / tag).

[0282] The carrier CW used for backscattering is also used to activate the ambient IoT AIOT device (device / tag) circuit.

[0283] The carrier CW can be used for energy storage, backscattering, and activation of the circuits of ambient IoT (AIOT) devices (devices / tags). The carrier CW comes from the same transmitting device, such as the same gNB, the same UE, or the same third-party node.

[0284] Sixth embodiment: Conditions for reactivating an AIOT device (device / tag) and configuration of activation signals:

[0285] In some embodiments of the present application, the solution of the sixth embodiment may be implemented in conjunction with the solution of the first, second, third, fourth, fifth, seventh, eighth, and / or ninth embodiment, or may be implemented independently of the solution of the first, second, third, fourth, fifth, seventh, eighth, and ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0286] For example, in some embodiments of the present application, this solution considers the conditions and configuration for sending an activation signal when reactivating an ambient IoT AIOT device (device / tag). The reader sends a first signal to activate the ambient IoT AIOT device (device / tag). The first signal is an activation signal for reactivating the ambient IoT AIOT device (device / tag). The ambient IoT AIOT device (device / tag) has been inventoried / commanded / located / sensed before activation.

[0287] For example, the conditions for reactivating an inventory / command / location / perception item in 1) include any of the following:

[0288] During the last round of inventory / command / positioning / perception, the environmental Internet of Things AIOT device (device / tag) reports UAI (UE assistance information), which includes at least one of the following: insufficient power / energy storage information, early service termination information, control information / data information demodulation failure information, predefined conditions, the reader periodically sends an activation signal to the environmental Internet of Things AIOT device (device / tag) with a stored ID, the reader sends an activation signal based on changes in channel conditions, for example, when the channel quality deteriorates, the frequency of repeated activation signals increases, the configuration of repeated activation signals, and the configuration of time-frequency resources.

[0289] The time-frequency resources of the repeated activation signal are configured by the first activation signal, which refers to the activation signal for the first communication of the ambient Internet of Things AIOT device (device / tag). The first activation signal can be a dedicated activation signal, such as the non-carrier CW activation signal of Example 4, or the carrier CW activation signal of Example 5. The time-frequency resources of the repeated activation signal are indicated by selection / paging / query / preamble / control message / data message. The repeated activation signal includes a first repeated activation signal and a second repeated activation signal, wherein the time-frequency resources of the second repeated activation signal can also be configured by the first repeated activation signal.

[0290] Configuration method:

[0291] Periodic configuration: The repetitive activation signal is configured periodically. For example, the reader configures the repetitive activation signal periodically through signaling such as select / paging / query / preamble / control message / data message.

[0292] Aperiodic configuration: The repetitive activation signal is configured aperiodically. For example, the reader sends a repetitive activation signal based on the UAI sent by the ambient IoT device (device / tag).

[0293] Seventh embodiment: frame structure design:

[0294] In some embodiments of the present application, the solution of the seventh embodiment may be implemented in conjunction with the solution of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the eighth embodiment, and / or the ninth embodiment, or may be implemented independently of the solution of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the eighth embodiment, and the ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0295] FIG5A is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG5A , the wireless communication method, executed on a first communication device, includes at least one of the following operations: Operation 501A: Receive at least one message sent by a second communication device. The at least one message includes a selection signal or a paging signal, or the bearer channel of the at least one message is a PRDCH, a PDRCH, a control channel, or a data channel.

[0296] With the above technical solution, the at least one message includes a selection signal or a paging signal, or the bearer channel of the at least one message is a PRDCH, PDRCH, control channel, or data channel. This provides a signal design / channel design solution that helps improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0297] FIG5B is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in FIG5B , the wireless communication method, executed on a second communication device, includes at least one of the following operations: Operation 501B: Sending at least one message to a first communication device. The at least one message includes a selection signal or a paging signal, or the bearer channel of the at least one message is a PRDCH, a PDRCH, a control channel, or a data channel.

[0298] With the above technical solution, the at least one message includes a selection signal or a paging signal, or the bearer channel of the at least one message is a PRDCH, PDRCH, control channel, or data channel. This provides a signal design / channel design solution that helps improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0299] In some embodiments of the present application, the first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user device. In some embodiments of the present application, in some embodiments of the present application, the frame structure of the selection signal or paging signal includes grouping information / selection information and a delimiter, and the delimiter is located before the grouping information / selection information, and the delimiter is used to indicate the starting time, duration or transmission timing of the transmission of the grouping information / selection information. In some embodiments of the present application, the frame structure of the selection signal or paging signal includes grouping information / selection information and preamble information, and the preamble information is located before the grouping information / selection information. After the first communication device receives the preamble information for synchronization, it receives the grouping information / selection information, and the preamble information is used to indicate the starting time, duration or transmission timing of the transmission of the grouping information / selection information.

[0300] In some embodiments of the present application, the frame structure of the selection signal or paging signal includes grouping information / selection information and preamble information, the grouping information / selection information is located before the preamble information, and the first communication device receives the grouping information / selection information and then receives the preamble information for synchronization. In some embodiments of the present application, the frame structure of the PRDCH or PDRCH or control channel or data channel includes a delimiter and preamble information, the grouping information / selection information is located before the preamble information, and the first communication device receives the grouping information / selection information and then receives the preamble information for synchronization. In some embodiments of the present application, the frame structure of the PRDCH or PDRCH or control channel or data channel includes any one of the following: preamble information; preamble information and control information; preamble information and data information; the preamble information, the control information and the data information; the control information; the data information; the control information and the data information. In some embodiments of the present application, the frame structure of the PRDCH or PDRCH or control channel or data channel also includes delimiter or end character indication information.

[0301] For example, in some embodiments of the present application, three sub-problems are mainly considered: 1) design of selection / paging signals; 2) PRDCH channel design; 3) PDRCH channel design.

[0302] Select / paging design:

[0303] The delimeter carries the select / paging function:

[0304] In addition to being used to select the population of AIOT devices / tags and group them, select / paging can also be used to indicate the starting position of AIOT devices / tags receiving instructions. Specifically, as shown in Figure 5C, the delimeter precedes the grouping / select information, where it indicates the start time, duration, and transmission occasion of the grouping / select information. When the delimeter carries the select / paging function, it should ensure at least one or more bits of 1.

[0305] The preamble carries the function of selection / paging. In addition to being used to select the population of environmental IoT AIOT devices (device / tag) / group environmental IoT AIOT devices (device / tag), selection / paging can also be used for time-frequency synchronization and carry the function of the preamble. After receiving the preamble for synchronization, the grouping information / select information is received; the preamble can also indicate the starting position, duration, and transmission occasion (occasion) of the grouping information / select information. After receiving the grouping information / synchronization information, you can also receive the preamble, or directly receive the control information / data information. Receive the grouping information / select information first, and then synchronize, as shown in Figure 5D.

[0306] The PRDCH / PDRCH channel design is shown in Figure 5E.

[0307] Delimeter + preamble + End of frame (EOF), where the delimeter and EOF are optional. The preamble is synchronization information and can also carry some control information or data information, where the control information is used to schedule the resources for the AIOT device (device / tag) to send signals; it can also carry other indication information, such as silence information.

[0308] Delimeter + preamble + control information + EOF, where the delimeter and EOF are optional. The preamble is synchronization information; the control information can indicate the starting position and bit length of the data information, can schedule the resources for the environmental Internet of Things (AIOT) device (device / tag) to transmit signals, and can also carry other instructions, such as silent information; it can also include data that the environmental Internet of Things (AIOT) device (device / tag) needs to receive and demodulate.

[0309] The delimeter + preamble + data + EOF (where the delimeter and EOF are optional). The preamble is synchronization information; the data includes the data that the AIOT device (device / tag) needs to receive and demodulate, and may also include department control information to indicate the starting position and bit length of the data information, and even schedule the resources for the AIOT device (device / tag) to transmit the signal.

[0310] Delimeter + preamble + control information + data information + EOF, where the delimeter and EOF are optional. The preamble is synchronization information; the control information can indicate the starting position and bit length of the data information, can schedule the resources for the environmental Internet of Things (AIOT) device (device / tag) to transmit signals, and can also carry other instructions, such as silence information; the data information indicates the data that the environmental Internet of Things (AIOT) device (device / tag) needs to receive and demodulate.

[0311] Delimeter + control information + EOF, where the delimeter and EOF are optional. The control information is used to schedule the resources for the AIOT device (device / tag) to send signals; it can also include synchronization information; it can also carry other indication information, such as silent information; it can also include data information for the AIOT device (device / tag) to receive and demodulate.

[0312] Delimeter + data information + EOF, where the delimeter and EOF are optional. The data information is used to carry data to be demodulated by the AIOT device (device / tag); it can also protect control information to indicate the starting position and bit length of the data; it can also be used to schedule the resources for tah signal transmission; it can also contain synchronization information; and it can also carry other indication information, such as silence information.

[0313] Delimeter + control information + data information + EOF (where the delimeter and EOF are optional). The control information is used to schedule the resources for the AIOT device (device / tag) to transmit signals; it may also include synchronization information and other indications, such as silence information. The data information is used by the AIOT device (device / tag) to receive and demodulate data information.

[0314] In the above frame structure, multiple Midambles can also be inserted into the control information or data information, which will not be described here.

[0315] Example 8: Issues related to repeated inventory counting:

[0316] In some embodiments of the present application, the solution of the eighth embodiment may be implemented in conjunction with the solution of the first, second, third, fourth, fifth, sixth, seventh, and / or ninth embodiment, or may be implemented independently of the solution of the first, second, third, fourth, fifth, sixth, seventh, and ninth embodiment. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0317] Figure 6A is a flow chart of a wireless communication method provided in an embodiment of the present application. As shown in Figure 6A, the wireless communication method is executed on a first communication device and includes at least one of the following operations: Operation 601A: Receive information sent by a second communication device, the information indicating a first communication device that needs to be repeatedly counted, a first communication device that needs to avoid repeated inventory, or an operation when taking inventory of multiple first communication devices.

[0318] Through the above technical solution, the information indicates the first communication device that needs to be re-inventored, the first communication device that needs to avoid re-inventoring, or the operation to be performed during the inventory of multiple first communication devices. This provides a solution to the problem of re-inventoring, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0319] Figure 6B is a flow chart of the wireless communication method provided in an embodiment of the present application. As shown in Figure 6B, the wireless communication method is executed on the second communication device and includes at least one of the following operations: Operation 601B: Sending information to the first communication device, the information indicating the first communication device that needs to be repeatedly counted, the first communication device that needs to avoid repeated inventory, or the operation when multiple first communication devices are inventoried.

[0320] Through the above technical solution, the information indicates the first communication device that needs to be re-inventored, the first communication device that needs to avoid re-inventoring, or the operation to be performed during the inventory of multiple first communication devices. This provides a solution to the problem of re-inventoring, helping to improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0321] In some embodiments of the present application, the first communication device is an AIOT device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or user equipment. In some embodiments of the present application, for a first communication device that has been inventoried, the first communication device receives again the information carrying the ID information, random number information, or temporary ID information of the first communication device that has been inventoried, and the information is used to activate the first communication device. In some embodiments of the present application, if the first communication device demodulates the information and the information matches the ID information, random number information, or temporary ID information of the first communication device that has been inventoried, then the first communication device enters a ready state for re-inventory, where the ready state refers to an activated state or a state ready to be inventoried. In some embodiments of the present application, after receiving a first signal from the second communication device, the process of sending a second signal, sending a first message, receiving a first response message, and sending a second message refers to an activated state, wherein the first signal is used to activate the first communication device, the second signal is used to provide paging information, selection information, or query information, the first message is used to provide a query command, the first response message is used to respond to the first message, and the second message is used to provide scheduling information. In some embodiments of the present application, the process in which the first communication device sends a second response message to the second communication device after receiving the second message, and the first communication device receives the third message sent by the second communication device is referred to as a connected state, wherein the second response message is used to respond to the second message. In some embodiments of the present application, the third message carries a first time window indicating that the first communication device is in an inactive state. In some embodiments of the present application, if the first communication device receives the fourth message sent by the second communication device within the second time window, the first communication device enters the connected state; otherwise, the first communication device enters the deactivated state. In some embodiments of the present application, after the first communication device reports its ID or data, it enters the inactive state and no longer enters the active state.

[0322] In some embodiments of the present application, if the first communication device receives the fourth information sent by the second communication device, the silent first communication device enters the activated state; or, if the first communication device does not receive the fourth information within the silent time / activation waiting time period, the first communication device enters the deactivated state. In some embodiments of the present application, if the information received by the first communication device during the second round of inventory is the same as the information during the first round of inventory, the first communication device does not send a feedback signal to the second communication device. In some embodiments of the present application, the first communication device reports user assistance information UAI during the previous round of inventory, and the UAI includes at least one of the following: insufficient power / energy storage information; early termination of service information; control information / data information demodulation failure information.

[0323] For example, in some embodiments of the present application, it is necessary to design related solutions for repeated inventory, avoid repeated inventory, and solve coverage limitations when taking inventory of multiple UEs.

[0324] Repeated inventory is required: indicated by special instructions (saving signaling overhead).

[0325] For AIOT devices (devices / tags) that have already been inventoried, simply resend a command with the recorded value based on the historical record value, such as RN16 or EPC / PC / XPC / AIOT device (device / tag) ID, to activate the AIOT device (device / tag). If the AIOT device (device / tag) demodulates the command and its historical record value matches the AIOT device (device / tag) ID / EPC / PC / XPC or the previously sent RN16, it will enter the ready state for re-inventory. The ready state refers to the activated state or the state ready for inventory.

[0326] Define the inactive state time, as shown in Figure 6C:

[0327] Activation state: After receiving the activation signal from the reader, the process of sending paging / select / challenge, first information (such as query instructions), receiving first response information (such as RN16), and sending second information (such as scheduling information, ACK (RN16)) is called the activation state.

[0328] Connected state: When the AIOT device (device / tag) receives the second message, indicating that the reader has successfully received the RN16 and can access the network to send data, it can send the second response message (such as the AIOT device (device / tag) ID / PC / EPC / XPC / other data) to the reader, and the AIOT device (device / tag) receives the third message sent by the reader. This process is called the connected state.

[0329] The third message primarily carries the duration, T, of the inactive state for the AIOT device (device / tag). If an activation signal (e.g., the fourth message) is received from the reader within T, the device enters the connected state; otherwise, it enters the deactivated state. This is intended to prevent the AIOT device (device / tag) from being re-inventoried by the reader within T after reporting its ID or data. Entering the inactive state saves power and eliminates the need for a re-inventory process (e.g., the active state), improving inventory efficiency.

[0330] Define the silent time / activation wait time, as shown in Figure 6D:

[0331] Silent Time / Activation Wait Time (First Time Point...): After receiving an activation signal from the reader, the device sends a paging / select / challenge message, a first message (such as a query), receives a first response message (such as RN16), and sends a second message (such as scheduling information, ACK (RN16)). When the AIOT device (device / tag) receives the second message, indicating that the reader has successfully received the RN16 and can access the network to send data, it then sends a second response message (such as the AIOT device / tag ID / PC / EPC / XPC / other data) to the reader. The AIOT device (device / tag) then receives the third message sent by the reader. After receiving the third message (silent indication, activation wait indication, activation wait time), the AIOT device (device / tag) enters a silent state, corresponding to the silent time or activation wait time. After the reader sends a fourth message, the silent AIOT device (device / tag) can be activated again. Alternatively, if the fourth information is not received within the silent time / activation waiting time period, deactivation is performed.

[0332] Avoid duplicate inventory, mainly considering Topology 2 (Topology 2), where different UEs repeatedly inventory the same IoT AIOT device (device / tag)

[0333] If the BLF received by the second round of inventory environment IoT AIOT device (device / tag) is the same as the first round, no response will be given

[0334] If the length / format of the delimeter / preamble signaling received by the IoT device / tag in the second round of inventory is the same as that in the first round, no response will be given.

[0335] Solve coverage limitations during multi-UE inventory

[0336] For device 1 / 2a: The UE first transmits a first signal. After the surrounding AIOT device (device / tag) reflects (fully or partially) this first signal, different UEs measure different path losses. The UE with the lowest path loss reports its UE ID / RSRP to the gNB, which then sends relevant information (such as scheduling information) to the UE for inventorying the surrounding AIOT device (device / tag). Note that this scenario assumes that the UE can identify the ID and measure backscattered RSRP.

[0337] For device 2b: Multiple UEs first transmit a first signal. After measuring the first signal, the AIOT device (device / tag) reports the measurement value and corresponding ID to the UE or gNB. The UE with the lowest path loss reports its UE ID / RSRP to the gNB, which then sends relevant information (such as scheduling information) to the UE for inventorying the AIOT device (device / tag). Note that this scenario assumes that the UE can identify the ID and measure backscatter RSRP.

[0338] Ninth embodiment:

[0339] In some embodiments of the present application, the solution of the ninth embodiment may be implemented in conjunction with the solution of the first, second, third, fourth, fifth, sixth, seventh, and / or eighth embodiments, or may be implemented independently of the solution of the first, second, third, fourth, fifth, sixth, seventh, and eighth embodiments. In some embodiments of the present application, the solutions of multiple embodiments may be implemented in combination or independently.

[0340] Figure 7A is a flow chart of a method for wireless communication provided in an embodiment of the present application. As shown in Figure 7A, the method for wireless communication includes at least one of the following operations: Operation 701A: sending or receiving data and / or signaling within a predefined first processing time, second processing time, third processing time, or fourth processing time, wherein: the first processing time refers to the processing time between the reader-to-device R2D signal transmission or activation signal transmission and the device-to-reader D2R signal transmission; the second processing time refers to the processing time between the D2R signal transmission and the R2D signal transmission or the activation signal transmission; the third processing time refers to the processing time between two different consecutive R2D signal transmissions or two different consecutive activation signal transmissions to the same environmental Internet of Things AIOT device; the fourth processing time refers to the processing time between two different consecutive D2R signal transmissions from the same AIOT device.

[0341] Through the above technical solution, data and / or signaling can be sent or received within a predefined first processing time, second processing time, third processing time, or fourth processing time. This can limit the sending and receiving time. This helps improve communication performance, increase inventory efficiency, and reduce signaling overhead.

[0342] In some embodiments of the present application, the R2D signal transmission carries the activation signal. In some embodiments of the present application, the activation signal is not within the R2D signal transmission. In some embodiments of the present application, the length of the first processing time refers to the minimum time interval between the R2D signal transmission or the activation signal transmission and the subsequent D2R signal transmission from the AIOT device to the reader / writer; the length of the second processing time refers to the minimum time interval between the D2R signal transmission and the subsequent corresponding R2D signal transmission or the subsequent corresponding activation signal transmission; the length of the third processing time refers to the minimum time interval between the two different consecutive R2D signal transmissions or two different consecutive activation signals to the same AIOT device; the length of the fourth processing time refers to the shortest time between the two different consecutive D2R signal transmissions from the same AIOT device.

[0343] In some embodiments of the present application, the processing time between the R2D signal transmission or the activation signal transmission and the D2R signal transmission refers to any one of the following: the time interval between the last information transmission of downlink information and the first information transmission of uplink information, the downlink is the R2D signal transmission link, and the uplink is the D2R signal transmission link; the time interval between the first information transmission of the downlink information and the last information transmission of the uplink information; the time interval between the first information transmission of the downlink information and the first information transmission of the uplink information; the time interval between the last information transmission of the downlink information and the last information transmission of the uplink information.

[0344] In some embodiments of the present application, the downlink information includes at least one of the following: a downlink preamble code, downlink control information and / or downlink data information, and the uplink information includes at least one of the following: an uplink preamble code, uplink control information and / or uplink data information.

[0345] In some embodiments of the present application, the processing time between two different consecutive R2D signal transmissions or two different consecutive activation signal transmissions to the same AIOT device refers to any of the following: the time interval between the last information transmission of a first downlink message and the first information transmission of a second downlink message, where the first downlink is a first R2D signal transmission link and the second downlink is a second R2D signal transmission link; the time interval between the first information transmission of the first downlink message and the last information transmission of the second downlink message; the time interval between the first information transmission of the first downlink message and the first information transmission of the second downlink message; the time interval between the last information transmission of the first downlink message and the last information transmission of the second downlink message. In some embodiments of the present application, the first downlink message and the second downlink message are two adjacent R2D signal transmission link messages transmitted in the same round of inventory. In some embodiments of the present application, the first downlink message is the last R2D signal transmission link message of the first round of inventory transmission, and the second downlink message is the first R2D signal transmission link message of the second round of inventory transmission.

[0346] In some embodiments of the present application, the processing time between two different consecutive D2R signal transmissions from the same AIOT device refers to any of the following: the time interval between the last information transmission of a first uplink message and the first information transmission of a second uplink message, where the first uplink is a first D2R signal transmission link and the second uplink is a second D2R signal transmission link; the time interval between the first information transmission of the first uplink message and the last information transmission of the second uplink message; the time interval between the first information transmission of the first uplink message and the first information transmission of the second uplink message; and the time interval between the last information transmission of the first uplink message and the last information transmission of the second uplink message. In some embodiments of the present application, the first uplink message and the second uplink message are two adjacent D2R signal transmission link messages transmitted in the same round of inventory. In some embodiments of the present application, the first uplink message is the last D2R signal transmission link message of the first round of inventory transmission, and the second uplink message is the first D2R signal transmission link message of the second round of inventory transmission.

[0347] In some embodiments of the present application, the starting position of the downlink information is synchronously aligned with a symbol, time slot, or time unit of the new air interface. In some embodiments of the present application, the first processing time, the second processing time, the third processing time, or the fourth processing time is related to the demodulation time of the physical channel PRDCH or the control channel or the data channel carrying signaling from the reader to the device, the preparation time of the physical channel PDRCH or the control channel or the data channel carrying signaling from the device to the reader, or the power factor.

[0348] In some embodiments of the present application, the demodulation time of the PRDCH or control channel or data channel carrying signaling is related to the device capability, device type, or device operating mode. In some embodiments of the present application, the device capability, the device type, or the difference between the device operating mode and the device capability, time offset, energy storage capacity, amplification capacity, or frequency shift capacity are related. In some embodiments of the present application, the preparation time of the PDRCH or control channel or data channel carrying signaling includes the time for the device to switch from the receiving state to the reflecting / transmitting state. In some embodiments of the present application, the power factor related to the processing time is related to the stability of the reader from power off to power on or the preparation time of the reader being powered on again. The power factor related to the processing time is related to the stability of the AIOT device from power off to power on or the preparation time of the AIOT device being powered on again.

[0349] For example, in some embodiments of the present application, the first processing time is defined as: the time interval between the D2R signal transmission and the previous R2D signal transmission, or the response to the previous PRDCH or control channel or data channel. In some embodiments of the present application, the length of the first processing time refers to the minimum time interval between the R2D signal transmission or the activation signal transmission and the subsequent D2R signal transmission from the AIOT device to the reader. Specifically, the following detailed definitions are provided:

[0350] R2D: DL preamble; D2R: UL preamble.

[0351] The duration from the last bit / rising edge / falling edge of the DL preamble received by the AIoT device to the first bit / rising edge / falling edge of the UL preamble received by the AIoT device.

[0352] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the last bit / rising edge / falling edge of the UL preamble.

[0353] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the first bit / rising edge / falling edge of the UL preamble.

[0354] The duration from when the AIoT device receives the last bit / rising edge / falling edge of the DL preamble to when the AIoT device receives the last bit / rising edge / falling edge of the UL preamble.

[0355] In addition to the definitions of i to iV for the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, you can also define the length of the first processing time. This length is the minimum time interval between the device receiving the R2D signal and sending the D2R signal. The definition is similar to i to iV and will not be repeated here.

[0356] For example, the length corresponding to the first processing time is:

[0357] 1) Processing time from R2D signal to D2R signal.

[0358] a) DL preamble to UL preamble.

[0359] b) DL preamble to UL data information.

[0360] c) DL preamble to UL control information.

[0361] d) DL control information to UL preamble.

[0362] e) DL control information to UL data information.

[0363] 2) The processing time from activation signal to D2R.

[0364] a) The activation signal is included in the R2D signal, i.e., it supplements the activation signal in the case of 1).

[0365] b) The activation signal is not included in the R2D signal.

[0366] It is worth noting that a bit can correspond to a chip, a symbol, or a time unit that needs to be defined. It is worth noting that for a), R2D can also be a control message or a data message; D2R can also be a control message or a data message. The configuration method of the non-combined signal structure is shown in a) and will not be repeated here. It is worth noting that the preamble / control message / data message may be sent repeatedly, and any of the above descriptions may refer to any preamble / control message / data message in the repeated transmission. It is worth noting that in a special case, the starting position of the DL preamble is synchronously aligned with the symbol, time slot, or time unit of the NR. Similarly, there are similar cases for control messages and data messages, which will not be repeated here.

[0367] R2D: DL preamble + control message; D2R: preamble.

[0368] The duration from when the AIoT device receives the last bit / rising edge / falling edge of the DL Control message to the first bit / rising edge / falling edge of the UL preamble.

[0369] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the last bit / rising edge / falling edge of the UL preamble.

[0370] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the first bit / rising edge / falling edge of the UL preamble.

[0371] The duration from the last bit / rising edge / falling edge of the DL control message received by the AIoT device to the last bit / rising edge / falling edge of the UL preamble.

[0372] In addition to the definitions of i to iV for the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, you can also define the length of the first processing time. This length is the minimum time interval between the device receiving the R2D signal and sending the D2R signal. The definition is similar to i to iV and will not be repeated here.

[0373] R2D: DL preamble; D2R: UL preamble + control message.

[0374] The duration from when the AIoT device receives the last bit / rising edge / falling edge of the DL preamble to the first bit / rising edge / falling edge of the UL preamble.

[0375] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the last bit / rising edge / falling edge of the UL control message.

[0376] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the first bit / rising edge / falling edge of the UL preamble.

[0377] The duration from when the AIoT device receives the last bit / rising edge / falling edge of the DL preamble to the last bit / rising edge / falling edge of the UL control message.

[0378] In addition to the definitions of i to iV for the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, you can also define the length of the first processing time. This length is the minimum time interval between the device receiving the R2D signal and sending the D2R signal. The definition is similar to i to iV and will not be repeated here.

[0379] R2D: DL preamble + control message; D2R: UL preamble + control message.

[0380] The duration from the last bit / rising edge / falling edge of the DL control message received by the AIoT device to the first bit / rising edge / falling edge of the UL preamble.

[0381] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the last bit / rising edge / falling edge of the UL control message.

[0382] The duration from when the AIoT device receives the first bit / rising edge / falling edge of the DL preamble to the first bit / rising edge / falling edge of the UL preamble.

[0383] The duration from when the AIoT device receives the last bit / rising edge / falling edge of a DL control message to when it receives the last bit / rising edge / falling edge of a UL control message.

[0384] In addition to the definitions of i~iV for the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, you can also define the length corresponding to the first processing time. This length is the minimum time interval between the device receiving the R2D signal and sending the D2R. Its definition is similar to i~iV and is not repeated here.

[0385] It is worth noting that for b)-d), R2D can also be a DL preamble + data message; D2R can also be a UL preamble + data message. The configuration of the signal structure of each combination is shown in b)-d) and will not be repeated here.

[0386] R2D: DL control message + data message; D2R: DL control message + data message.

[0387] The duration from the last bit / rising edge / falling edge of the DL data message received by the AIoT device to the first bit / rising edge / falling edge of the UL control message received by the AIoT device.

[0388] The duration from when the AIoT device receives the first bit / rising edge / falling edge of a DL control message to the last bit / rising edge / falling edge of a UL data message.

[0389] The duration from when the AIoT device receives the first bit / rising edge / falling edge of a DL control message to when it receives the first bit / rising edge / falling edge of a UL control message.

[0390] The duration from when the AIoT device receives the last bit / rising edge / falling edge of the DL data message to when it receives the last bit / rising edge / falling edge of the UL data message.

[0391] In addition to the definitions of i to iV for the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, you can also define the length of the first processing time. This length is the minimum time interval between the device receiving the R2D signal and sending the D2R signal. The definition is similar to i to iV and will not be repeated here.

[0392] R2D: preamble + DL control message + data message; D2R: preamble + DL control message + data message.

[0393] It's worth noting that in combinations b)-f), the last bit / rising edge / falling edge or the first bit / rising edge / falling edge may be located at the boundary between different signals in the combined signal. It's also worth noting that the first processing time can also be defined by the activation signal time, indicating the first bit / rising edge / falling edge information of the PRDCH signal (the PRDCH carries the activation signal).

[0394] The definition of the second processing time is shown in FIG7B : the length of the second processing time refers to the minimum time interval between the D2R signal transmission and the subsequent corresponding R2D signal transmission or the subsequent corresponding activation signal transmission.

[0395] The first signal / channel includes a fourth sequence (also called a timing signal), which is used to indicate the start time of the first signal / channel. The first signal / channel may also include data / control information, a fifth sequence (also called a midamble or synchronization signal) for uplink (device to reader) synchronization, and a sixth sequence (also called a postamble) for uplink synchronization or indicating the end time of the first signal / channel.

[0396] The second signal / channel includes a first sequence (also called a timing signal), which is used to indicate the start time of the second signal / channel. The second signal / channel may also include data / control information, a second sequence (also called a midamble or synchronization signal) used for downlink (reader to device) synchronization, and a third sequence (also called a postamble) used for downlink synchronization or indicating the end time of the second signal.

[0397] The device sends a first signal / channel. The gNB or the intermediate node receives the first signal / channel.

[0398] The gNB or intermediate node sends a second signal / channel. The device receives the second signal / channel.

[0399] Definition of the third processing time:

[0400] The time interval between two consecutive signaling messages sent by the reader during an inventory / command / positioning / sensing service, for example, the time interval between Paging and random access information. This is different from NR paging, which is used to group and select devices.

[0401] The duration from when the reader sends the last bit / rising edge / falling edge information of the first signaling to the first bit / rising edge / falling edge information of the second signaling.

[0402] The duration from when the reader sends the first bit / rising edge / falling edge information of the first signaling to when the reader sends the first bit / rising edge / falling edge information of the second signaling.

[0403] The duration from the first bit / rising edge / falling edge information of the first signaling to the last bit / rising edge / falling edge information of the second signaling sent by the reader / writer.

[0404] The duration from the reader sending the last bit / rising edge / falling edge information of the first signaling to the last bit / rising edge / falling edge information of the second signaling.

[0405] In addition to the above definitions of the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, the length corresponding to the third processing time can also be defined. This length is the minimum time interval for the reader to continuously send two adjacent PRDCH signalings in the same inventory process. Its definition is similar to the above and will not be repeated here.

[0406] In a special case, the starting position of the PRDCH sent by the reader is synchronized with the symbol, time slot or time unit of the NR.

[0407] The time interval between two consecutive signaling messages sent by the reader in different inventory / command / positioning / sensing services. For example, the time interval between the last message (e.g., ACK message) sent in the first inventory round and the first message (random access message) sent in the second inventory round.

[0408] The duration from the time the reader sends the last bit / rising edge / falling edge of the last signaling of the first round of business to the time the reader sends the first bit / rising edge / falling edge of the first signaling of the second round of business.

[0409] The duration from the reader sending the first bit / rising edge / falling edge information of the last signaling of the first round of business to the first bit / rising edge / falling edge information of the first signaling of the second round of business.

[0410] The duration from the reader sending the first bit / rising edge / falling edge information of the last signaling of the first round of business to the last bit / rising edge / falling edge information of the first signaling of the second round of business.

[0411] The duration from the reader sending the last bit / rising edge / falling edge information of the last signaling of the first round of business to the last bit / rising edge / falling edge information of the first signaling of the second round of business.

[0412] In addition to the above definitions of the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, the length corresponding to the third processing time can also be defined. This length is the minimum time interval for continuously sending two adjacent PRDCH signalings in different inventory processes of the reader / writer (for example, the interval between sending ACK in the first round of inventory and sending the query repetition for the second round of inventory). Its definition is similar to the above and will not be repeated here.

[0413] In a special case, the starting position of the PRDCH sent by the reader is synchronized with the symbol, time slot or time unit of the NR.

[0414] Definition of the third processing time: The length of the third processing time refers to the minimum time interval between the two different consecutive R2D signal transmissions or the two different consecutive activation signals to the same AIOT device.

[0415] The time interval between two consecutive signalings sent by the reader in an inventory / command / positioning / sensing service, for example, the time interval between Paging and random access information, which is different from NR paging, which is used to group and select devices.

[0416] The duration from when the reader sends the last bit / rising edge / falling edge information of the first signaling to the first bit / rising edge / falling edge information of the second signaling.

[0417] The duration from when the reader sends the first bit / rising edge / falling edge information of the first signaling to when the reader sends the first bit / rising edge / falling edge information of the second signaling.

[0418] The duration from the first bit / rising edge / falling edge information of the first signaling to the last bit / rising edge / falling edge information of the second signaling sent by the reader / writer.

[0419] The duration from the reader sending the last bit / rising edge / falling edge information of the first signaling to the last bit / rising edge / falling edge information of the second signaling.

[0420] In addition to the above definitions of the first bit / rising edge / falling edge and the last bit / rising edge / falling edge, the length corresponding to the third processing time can also be defined. This length is the minimum time interval for the reader to continuously send two adjacent PRDCH signalings in the same inventory process. Its definition is similar to the above and will not be repeated here.

[0421] A special case where the starting position of the PRDCH sent by the reader is the time interval between two consecutive signalings sent by the reader in different inventory / command / positioning / perception services that are synchronized with the NR symbol, time slot or time unit, for example, the time interval between the last information sent in the first round of inventory (for example, ACK information) and the first information sent in the second round of inventory (random access information).

[0422] The duration from the time the reader sends the last bit / rising edge / falling edge of the last signaling of the first round of business to the time the reader sends the first bit / rising edge / falling edge of the first signaling of the second round of business.

[0423] The duration from the reader sending the first bit / rising edge / falling edge information of the last signaling of the first round of business to the first bit / rising edge / falling edge information of the first signaling of the second round of business.

[0424] The duration from the reader sending the first bit / rising edge / falling edge information of the last signaling of the first round of business to the last bit / rising edge / falling edge information of the first signaling of the second round of business.

[0425] The duration from the reader sending the last bit / rising edge / falling edge information of the last signaling of the first round of business to the last bit / rising edge / falling edge information of the first signaling of the second round of business.

[0426] In addition to the above definitions of first bit / rising edge / falling edge and last bit / rising edge / falling edge, a third processing time length can also be defined. This length is the minimum time interval between two consecutive PRDCH signaling messages sent by the reader in different inventory processes (for example, the interval between sending an ACK in the first inventory round and sending a query repetition in the second inventory round). The definition is similar to the above and will not be repeated here.

[0427] A special case where the starting position of the PRDCH sent by the reader is synchronized with the symbol, time slot or time unit of the NR

[0428] The device continuously sends the first signal / channel, which are respectively denoted as signal / channel 1 and signal / channel 2. The gNB or intermediate node continuously receives the first signal / channel twice.

[0429] As shown in FIG. 7C , the length of the fourth processing time refers to the shortest time between the two different consecutive D2R signal transmissions from the same AIOT device.

[0430] There needs to be a time interval between signal / channel 1 and signal / channel 2. That is, after the device sends signal / channel 1, it must send signal / channel 2 no earlier than the time interval. Correspondingly, there can also be a time interval between the reader receiving signal / channel 1 and the reader receiving signal / channel 2. That is, after the reader receives signal / channel 1, it must receive signal / channel 2 no earlier than the time interval.

[0431] The minimum time interval between two consecutively transmitted first signals / channels is expressed as a second duration.

[0432] The reader and the device need to have the same understanding of the second duration. The starting time of the second duration can be defined as in one of the definitions in reference embodiment 2.

[0433] Processing time constraints:

[0434] Demodulation time of PRDCH signaling:

[0435] Device capability / device type / operating mode:

[0436] Sampling Frequency Offset (SFO) / Time Offset (TO): Different devices have different SFOs or TOs, which affect the demodulation time of the signaling carried by the PRDCH. For example, as shown in the table below, for device 1, the SFO is larger, and the required time is T1. For device 2, the SFO is smaller, and the time required for the same data length / code rate / modulation method is T2. T1 may be greater than T2, ultimately affecting the first processing time.

[0437] Energy storage capacity.

[0438] Amplification ability.

[0439] Frequency shifting capability.

[0440] The bit rate of the R2D signal.

[0441] Preparation time for PDRCH to carry signaling.

[0442] The switching time from RX to TX, that is, the time it takes for the device to switch from the receiving state to the reflecting / transmitting state, is included in the PRDCH preparation time.

[0443] Power-down to Power-up stability: Before sending a command, the reader adjusts the power until the power stabilizes before sending the command. For example, TCP is the time required for the reader to stabilize from power-down to power-up, and the third processing time must be greater than this time.

[0444] Power-Up Preparation Time: After the reader is powered on and off and stabilizes, if it needs to be powered on again, it must remain powered off for at least N ms before it can be powered on again, where N is a real number greater than or equal to 0. For example, RFID 6C stipulates that once the power drops to Ms, the reader must maintain this time for at least 1 ms before powering on again.

[0445] Different measurement values ​​of RSRP / RSSI, for example, may affect the above-mentioned processing time.

[0446] Figure 8 is a schematic structural diagram of a wireless communication device 700 provided in an embodiment of the present application. The wireless communication device can be a user equipment, a base station, or a network element. The wireless communication device 700 shown in Figure 8 includes a processor 710, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0447] Optionally, as shown in FIG8 , the wireless communication device 700 may further include a memory 720. The processor 710 may call and execute a computer program from the memory 720 to implement the method in the embodiment of the present application. The memory 720 may be a separate device independent of the processor 710 or may be integrated into the processor 710.

[0448] Optionally, as shown in FIG8 , the wireless communication device 700 may further include a transceiver 730. The processor 710 may control the transceiver 730 to communicate with other devices. Specifically, the transceiver 730 may send information or data to other devices or receive information or data sent by other devices. The transceiver 730 may include a transmitter and a receiver. The transceiver 730 may further include an antenna, which may be one or more.

[0449] Optionally, the wireless communication device 700 may specifically be the first communication device 110 of the embodiment of the present application, and the wireless communication device 700 may implement the corresponding processes implemented by the first communication device 110 in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0450] Optionally, the wireless communication device 700 may specifically be a user equipment of an embodiment of the present application, and the wireless communication device 700 may implement the corresponding processes implemented by the user equipment in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0451] Optionally, the wireless communication device 700 may specifically be a network element in an embodiment of the present application, and the wireless communication device 700 may implement the corresponding processes implemented by the network element in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0452] Figure 9 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 800 shown in Figure 9 includes a processor 810, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0453] Optionally, as shown in FIG9 , the chip 800 may further include a memory 820. The processor 810 may call and execute computer programs from the memory 820 to implement the methods in the embodiments of the present application. The memory 820 may be a separate device independent of the processor 810 or may be integrated into the processor 810.

[0454] Optionally, the chip 800 may further include an input interface 830. The processor 910 may control the input interface 830 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0455] Optionally, the chip 800 may further include an output interface 840. The processor 810 may control the output interface 840 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0456] Optionally, the chip can be applied to the first communication device 110 in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first communication device 110 in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0457] Optionally, the chip can be applied to the user equipment in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the user equipment in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0458] Optionally, the chip can be applied to the network element in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the mobile network element in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0459] Figure 10 is a schematic block diagram of a wireless communication system 100 provided in an embodiment of the present application. As shown in Figure 10, the communication system 100 includes a second communication device 140 and a first communication device 110. The second communication device 140 can be used to implement the corresponding functions implemented by the second communication device 140 in the above method, and the first communication device 110 can be used to implement the corresponding functions implemented by the first communication device 110 in the above method. For the sake of brevity, these are not further described here.

[0460] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment may be completed by hardware integrated logic circuits in the processor or software instructions.

[0461] It is understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory. The embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

[0462] Optionally, the computer-readable storage medium may be applied to a network device in an embodiment of the present application, and the computer program causes a computer to execute the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, no further description is given here. Optionally, the computer-readable storage medium may be applied to a user device in an embodiment of the present application, and the computer program causes a computer to execute the corresponding processes implemented by the user device in each method in the embodiment of the present application. For the sake of brevity, no further description is given here.

[0463] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0464] Optionally, the computer program product may be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, no further description is given here. Optionally, the computer program product may be applied to the user equipment in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the user equipment in the various methods of the embodiments of the present application. For the sake of brevity, no further description is given here.

[0465] The embodiment of the present application also provides a computer program.

[0466] Optionally, the computer program may be applied to the network device in the embodiments of the present application. When the computer program is run on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, no further details are given here. Optionally, the computer program may be applied to the user equipment in the embodiments of the present application. When the computer program is run on a computer, the computer executes the corresponding processes implemented by the user equipment in the various methods of the embodiments of the present application. For the sake of brevity, no further details are given here.

[0467] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0468] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, executed on a first communication device, comprising: Receive at least one synchronization information sent by a second communication device, wherein the at least one synchronization information is used to achieve downlink or uplink time and frequency synchronization, and the bearer channel of the at least one synchronization information is a physical channel PRDCH from the reader to the device, a physical channel PDRCH from the device to the reader, a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH, and the at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

2. The wireless communication method according to claim 1, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

3. The wireless communication method according to claim 1, wherein: The at least one low-rate synchronization information includes synchronization information of different rate levels.

4. The wireless communication method according to claim 1, wherein: The at least one high-rate synchronization information includes synchronization information of different rate levels.

5. The wireless communication method according to claim 1, wherein: The frame structure of the at least one synchronization information includes any one of the following; a first synchronization message; The first synchronization information and at least one control information; The first synchronization information and at least one data information; the one first synchronization information, the at least one control information and the at least one data information; a plurality of first synchronization information; a plurality of first synchronization information and the at least one control information; the plurality of first synchronization information and the at least one data information; the plurality of first synchronization information, the at least one control information and the at least one data information; a second synchronization message; the one second synchronization information and the at least one control information; the one second synchronization message and the at least one data message; the one second synchronization information, the at least one control information and the at least one data information; a plurality of second synchronization information; a plurality of second synchronization information and the at least one control information; the plurality of second synchronization information and the at least one data information; the plurality of second synchronization information, the at least one control information and the at least one data information; The at least one first synchronization information and the at least one second synchronization information, and the at least one control information and / or the at least A data message. The wireless communication method according to claim 5 , wherein: The frame structure of the at least one synchronization information further includes activation information, a delimiter, or an end mark indication information.

7. The wireless communication method according to claim 5, wherein: The first synchronization information indicates the timing, time interval, time offset, number of repetitions, or frequency information of the subsequent first synchronization information; or each synchronization information indicates the timing, time interval, time offset, number of repetitions, or frequency information of the subsequent adjacent synchronization information.

8. The wireless communication method according to claim 5, wherein: The at least one first synchronization information or the at least one second synchronization information indicates the time-frequency resources of the at least one control information and / or the at least one data information, and the time-frequency resources include time domain resources and frequency domain resources for carrying uplink or downlink control information, or time domain resources and frequency domain resources for carrying uplink or downlink data information; wherein, the time domain resources of the uplink data information include the sending timing of the uplink data information, the time interval or time offset relative to the at least one first synchronization information or the at least one second synchronization information; the frequency domain resources of the uplink data information include the code rate or backscatter link frequency of the uplink data information.

9. The wireless communication method according to claim 1, wherein: The at least one synchronization information is periodically configured, aperiodically configured, or pre-configured.

10. The wireless communication method according to claim 9, wherein: In one piece of information, the configuration of the at least one synchronization information is periodic configuration.

11. The method for wireless communication according to claim 10, wherein: The piece of information includes radio resource control RRC signaling or medium access control element MAC CE signaling.

12. The method for wireless communication according to claim 9, wherein: In one message, the configuration of the at least one synchronization message is aperiodic configuration.

13. The method for wireless communication according to claim 12, wherein: In a piece of information, the configuration of the at least one synchronization information is a non-periodic configuration, which means that the non-periodic configuration is dynamically indicated by the second communication device through the at least one synchronization information.

14. The method for wireless communication according to claim 1, wherein: The modulation mode of the periodic configuration of the at least one synchronization information is on-off keying OFDM-OOK modulation based on orthogonal frequency division multiplexing, frequency shift keying FSK modulation, single carrier SC-OFDM modulation, or single-tone based OOK modulation.

15. The method for wireless communication according to claim 14, wherein: The OFDM-OOK modulation includes OFDM-OOK-1 modulation, OFDM-OOK-2 modulation, OFDM-OOK-3 modulation, or OFDM-OOK-4 modulation.

16. A wireless communication method, executed by a first communication device, comprising: Receive a first signal sent by a second communication device, wherein the first signal is used for time-frequency synchronization of receiving or sending information by the first communication device, the first signal is an energy storage signal used for storing energy of the first communication device, or the first signal is an activation signal for activating an activation threshold of the first communication device, or the first signal includes a carrier signal.

17. The method for wireless communication according to claim 16, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

18. The method for wireless communication according to claim 16, wherein: When the reference signal received power RSRP of the first signal is greater than the activation threshold or greater than X dB of the activation threshold, the energy storage signal or the activation signal is used as a synchronization signal, and X is greater than 0.

19. The method for wireless communication according to claim 16, wherein: The carrier signal is a waveform that has been periodically or non-periodically modulated or encoded.

20. The method for wireless communication according to claim 16, wherein: The carrier signal is sent within a fixed time period, or the carrier signal is sent at a fixed frequency position, or the time-frequency resources of the carrier signal are pre-configured, indicated by the first communication device, or indicated by the second communication device, and the time-frequency resources include time domain resources and frequency domain resources; wherein the time domain resources include the sending timing of the carrier signal, the time interval or time offset relative to the first signal; the frequency domain resources include the code rate or backscatter link frequency of the carrier signal.

21. The method for wireless communication according to claim 16, wherein: The first signal is periodically configured, aperiodically configured, statically configured, semi-statically configured, or dynamically configured.

22. The method for wireless communication according to claim 21, wherein: When the first signal is periodically configured, the period of the first signal is a first time interval or a second time interval, and the second time interval is related to the first time interval and a time offset.

23. The method for wireless communication according to claim 21, wherein: When the first signal is a non-periodic configuration, the first signal at the previous moment is used to indicate the time interval between the subsequent first signal and the first signal at the previous moment, so that the first communication device completes demodulation or transmission, or the first signal is used to indicate the timing of sending the subsequent first signal at the first moment, so that the first communication device completes demodulation or transmission.

24. The wireless communication method according to claim 21, wherein the first signal is statically, semi-statically or dynamically configured through signaling, and the signaling includes indication information defined by the core network CN, MAC CE, activation signal, selection signal, paging signal, control information or data information.

25. The method for wireless communication according to claim 16, wherein: The activation signal is a select signal, a paging signal, a delimiter signal, a preamble signal, a control message signal, or a data message signal.

26. A wireless communication method, executed by a first communication device, comprising: Synchronization is achieved through the coding mechanism of the first signal, including aligning with the time-frequency resources of the new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal, wherein, when the first communication device detects the first signal configured by the second communication device, the first signal is aligned with the time-frequency resources of the new air interface signal, wherein the time-frequency resource alignment method includes bit level or time slot level.

27. The method for wireless communication according to claim 26, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

28. The method for wireless communication according to claim 26, wherein: The first signal transmits the data bits to be transmitted.

29. The method for wireless communication according to claim 28, wherein: The variation or variation trend of the demodulated first signal is linearly coded.

30. The method of wireless communication according to claim 26, wherein: The first signal includes code rate information, sequence information, or duty cycle information used for periodic synchronization.

31. The method for wireless communication according to claim 30, further comprising receiving first information, wherein the first information is used to indicate code rate information, sequence information, or duty cycle information used for periodic synchronization in the first signal.

32. The method of wireless communication according to claim 30, wherein: When the first communication device or the second communication device detects a fixed code rate, the first signal is aligned with the time-frequency resources of the new air interface signal.

33. The method of wireless communication according to claim 30, wherein: When the first communication device continuously detects multiple change amounts or multiple change trends of the first signal, the first signal is aligned with the time-frequency resources of the new air interface signal.

34. The method of wireless communication according to claim 26, wherein: The first signal includes code rate information, sequence information, or duty cycle information for non-periodic synchronization.

35. The method for wireless communication according to claim 26, further comprising receiving second information, wherein the second information is used to indicate code rate information, sequence information, or duty cycle information used for non-periodic synchronization in the first signal.

36. The method of wireless communication according to claim 34, wherein: When the first communication device detects multiple change amounts or multiple change trends of the first signal within a fixed time, the first signal is aligned with the time-frequency resources of the new air interface signal.

37. The method of wireless communication according to claim 34, wherein: When the first communication device continuously detects predefined energy, the first signal is aligned with the time-frequency resources of the new air interface signal; or when the first communication device detects predefined energy within a fixed time, the first signal is aligned with the time-frequency resources of the new air interface signal.

38. A wireless communication method, executed on a first communication device, comprising: At least one information sent by a second communication device is received, wherein the at least one information includes a selection signal or a paging signal, or a bearing channel of the at least one information is a PRDCH or a PDRCH or a control channel or a data channel.

39. The method of wireless communication according to claim 38, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

40. The method of wireless communication according to claim 38, wherein: The frame structure of the selection signal or paging signal includes grouping information / selection information and a delimiter. The delimiter is located before the grouping information / selection information and is used to indicate the starting time, duration or transmission opportunity of the grouping information / selection information.

41. The method of wireless communication according to claim 38, wherein: The frame structure of the selection signal or paging signal includes group information / selection information and preamble information. The preamble information is located before the group information / selection information. After the first communication device receives the preamble information for synchronization, it receives the group information / selection information. The preamble information is used to indicate the starting time, duration or transmission opportunity of the group information / selection information transmission.

42. The method of wireless communication according to claim 38, wherein: The frame structure of the selection signal or paging signal includes grouping information / selection information and preamble information. The grouping information / selection information is located before the preamble information. The first communication device receives the grouping information / selection information and then receives the preamble information for synchronization.

43. The method of wireless communication according to claim 38, wherein: The frame structure of the PRDCH or PDRCH or the control channel or the data channel includes a delimiter and a leading information, and the grouping information / selection information is located before the leading information. The first communication device receives the grouping information / selection information and then receives the leading information for synchronization.

44. The method of wireless communication according to claim 38, wherein: The frame structure of the PRDCH or PDRCH or control channel or data channel includes any one of the following; Leading information; Preamble information and control information; Preamble information and data information; The preamble information, the control information and the data information; the control information; the data information; The control information and the data information.

45. The method of wireless communication according to claim 44, wherein: The frame structure of the PRDCH or PDRCH or control channel or data channel further includes delimiter or terminator indication information.

46. ​​A wireless communication method, executed by a first communication device, comprising: Information sent by a second communication device is received, where the information indicates a first communication device that needs to be repeatedly counted, a first communication device that needs to avoid repeated inventory, or an operation during inventory counting of multiple first communication devices.

47. The method of wireless communication according to claim 46, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

48. The method of wireless communication according to claim 46, wherein: For a first communication device that has been inventoried, the first communication device receives the information again, where the information carries the ID information, random number information, or temporary ID information of the first communication device that has been inventoried, and the information is used to activate the first communication device.

49. The method of wireless communication according to claim 47, wherein: If the information demodulated by the first communication device matches the ID information, random number information or temporary ID information of the first communication device that has been inventoried, the ready state for re-inventory is performed, and the ready state refers to an activated state or a state ready to be inventoried.

50. The method of wireless communication according to claim 47, wherein: After receiving the first signal from the second communication device, the process of sending the second signal, sending the first information, receiving the first response information, and sending the second information refers to the activation state, wherein the first signal is used to stimulate the first communication device, the second signal is used to provide paging information, selection information, and inquiry information, the first information is used to provide a query command, the first response information is used to respond to the first information, and the second information is used to provide scheduling information.

51. The method of wireless communication according to claim 50, wherein: The process in which the first communication device sends second response information to the second communication device after receiving the second information and the first communication device receives third information sent by the second communication device is referred to as a connected state, wherein the second response information is used to respond to the second information.

52. The method of wireless communication according to claim 51, wherein: The third information carries a first time window indicating that the first communication device is in an inactive state.

53. The method of wireless communication according to claim 52, wherein: If the first communication device receives the fourth information sent by the second communication device within the second time window, the first communication device enters the connected state; otherwise, the first communication device enters the deactivated state.

54. The method of wireless communication according to claim 53, wherein: After the first communication device reports the ID or data, it enters the inactive state and no longer enters the active state.

55. The method of wireless communication according to claim 53, wherein: If the first communication device receives the fourth information sent by the second communication device, the silent first communication device enters the activated state; or if the first communication device does not receive the fourth information within the silent time / activation waiting time period, the first communication device enters the deactivated state.

56. The method of wireless communication according to claim 53, wherein: If, during the second round of inventory counting, the information received by the first communication device is the same as the information received during the first round of inventory counting, the first communication device does not send a feedback signal to the second communication device.

57. The method of wireless communication according to claim 53, wherein: The first communication device reports user assistance information UAI during the last inventory round, where the UAI includes at least one of the following: Insufficient power / energy storage information; Information on early termination of business; Control information / data information demodulation failure information.

58. A wireless communication method, executed by a second communication device, comprising: At least one synchronization information is sent to the first communication device, wherein the at least one synchronization information is used to achieve downlink or uplink time and frequency synchronization, and the bearer channel of the at least one synchronization information is the physical channel PRDCH from the reader to the device, the physical channel PDRCH from the device to the reader, the physical downlink control channel PDCCH, the physical downlink shared channel PDSCH, the physical uplink control channel PUCCH, or the physical uplink shared channel PUSCH, and the at least one synchronization information includes at least one first synchronization information and / or at least one second synchronization information, wherein the at least one first synchronization information is at least one low-rate synchronization information, and the at least one second synchronization information is at least one high-rate synchronization information.

59. The method of wireless communication according to claim 58, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

60. The method of wireless communication according to claim 58, wherein: The at least one low-rate synchronization information includes synchronization information of different rate levels.

61. The method of wireless communication according to claim 58, wherein: The at least one high-rate synchronization information includes synchronization information of different rate levels.

62. The method of wireless communication according to claim 58, wherein: The frame structure of the at least one synchronization information includes any one of the following; a first synchronization message; The first synchronization information and at least one control information; The first synchronization information and at least one data information; the one first synchronization information, the at least one control information and the at least one data information; a plurality of first synchronization information; a plurality of first synchronization information and the at least one control information; the plurality of first synchronization information and the at least one data information; the plurality of first synchronization information, the at least one control information and the at least one data information; a second synchronization message; the one second synchronization information and the at least one control information; the one second synchronization message and the at least one data message; the one second synchronization information, the at least one control information and the at least one data information; a plurality of second synchronization information; a plurality of second synchronization information and the at least one control information; the plurality of second synchronization information and the at least one data information; the plurality of second synchronization information, the at least one control information and the at least one data information; The at least one first synchronization information and the at least one second synchronization information, and the at least one control information and / or the at least one data information.

63. The method of wireless communication according to claim 62, wherein: The frame structure of the at least one synchronization information further includes activation information, a delimiter, or an end mark indication information.

64. The method of wireless communication according to claim 62, wherein: The first synchronization information indicates the timing, time interval, time offset, number of repetitions, or frequency information of the subsequent first synchronization information; or each synchronization information indicates the timing, time interval, time offset, number of repetitions, or frequency information of the subsequent adjacent synchronization information.

65. The method of wireless communication according to claim 62, wherein: The at least one first synchronization information or the at least one second synchronization information indicates the time-frequency resources of the at least one control information and / or the at least one data information, and the time-frequency resources include time domain resources and frequency domain resources for carrying uplink or downlink control information, or time domain resources and frequency domain resources for carrying uplink or downlink data information; wherein, the time domain resources of the uplink data information include the sending timing of the uplink data information, the time interval or time offset relative to the at least one first synchronization information or the at least one second synchronization information; the frequency domain resources of the uplink data information include the code rate or backscatter link frequency of the uplink data information.

66. The method of wireless communication according to claim 58, wherein: The at least one synchronization information is periodically configured, aperiodically configured, or pre-configured.

67. The method of wireless communication according to claim 66, wherein: In one piece of information, the configuration of the at least one synchronization information is periodic configuration.

68. The method of wireless communication according to claim 67, wherein: The piece of information includes radio resource control RRC signaling or medium access control element MAC CE signaling.

69. The method of wireless communication according to claim 66, wherein: In one message, the configuration of the at least one synchronization message is aperiodic configuration.

70. The method of wireless communication according to claim 69, wherein: In a piece of information, the configuration of the at least one synchronization information is a non-periodic configuration, which means that the non-periodic configuration is dynamically indicated by the second communication device through the at least one synchronization information.

71. The method of wireless communication according to claim 58, wherein: The modulation mode of the periodic configuration of the at least one synchronization information is on-off keying OFDM-OOK modulation based on orthogonal frequency division multiplexing, frequency shift keying FSK modulation, single carrier SC-OFDM modulation, or single-tone based OOK modulation.

72. The method of wireless communication according to claim 71, wherein: The OFDM-OOK modulation includes OFDM-OOK-1 modulation, OFDM-OOK-2 modulation, OFDM-OOK-3 modulation, or OFDM-OOK-4 modulation.

73. A wireless communication method, executed on a second communication device, comprising: A first signal is sent to a first communication device, wherein the first signal is used for time-frequency synchronization of receiving or sending information by the first communication device, the first signal is an energy storage signal for storing energy of the first communication device, or the first signal is an activation signal for activating an activation threshold of the first communication device, or the first signal includes a carrier signal.

74. The method of wireless communication according to claim 73, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

75. The method of wireless communication according to claim 73, wherein: When the reference signal received power RSRP of the first signal is greater than the activation threshold or greater than X dB of the activation threshold, the energy storage signal or the activation signal is used as a synchronization signal, and X is greater than 0.

76. The method of wireless communication according to claim 73, wherein: The carrier signal is a waveform that has been periodically or non-periodically modulated or encoded.

77. The method of wireless communication according to claim 73, wherein: The carrier signal is sent within a fixed time period, or the carrier signal is sent at a fixed frequency position, or the time-frequency resources of the carrier signal are pre-configured, indicated by the first communication device, or indicated by the second communication device, and the time-frequency resources include time domain resources and frequency domain resources; wherein the time domain resources include the sending timing of the carrier signal, the time interval or time offset relative to the first signal; the frequency domain resources include the code rate or backscatter link frequency of the carrier signal.

78. The method of wireless communication according to claim 73, wherein: The first signal is periodically configured, aperiodically configured, statically configured, semi-statically configured, or dynamically configured.

79. The method of wireless communication according to claim 78, wherein: When the first signal is periodically configured, the period of the first signal is a first time interval or a second time interval, and the second time interval is related to the first time interval and a time offset.

80. The method of wireless communication according to claim 78, wherein: When the first signal is configured non-periodically, the first signal at the previous moment indicates the time interval between the subsequent first signal and the first signal at the previous moment, or the first signal indicates the timing of sending the subsequent first signal at the first moment.

81. The wireless communication method according to claim 78, wherein the first signal is statically, semi-statically or dynamically configured through signaling, and the signaling includes indication information defined by the core network CN, MAC CE, activation signal, selection signal, paging signal, control information or data information.

82. The method of wireless communication according to claim 73, wherein: The activation signal is a select signal, a paging signal, a delimiter signal, a preamble signal, a control message signal, or a data message signal.

83. A wireless communication method, executed on a second communication device, comprising: Configure a first signal to the first communication device and achieve synchronization through the coding mechanism of the first signal, including aligning the time-frequency resources with the new air interface signal by detecting the change amount and / or change trend and / or code rate of the first signal, wherein the time-frequency resource alignment method includes bit level or time slot level.

84. The method of wireless communication according to claim 83, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

85. The method of wireless communication according to claim 83, wherein: The first signal transmits the data bits to be transmitted.

86. The method of wireless communication according to claim 85, wherein: The variation or variation trend of the demodulated first signal is linearly coded.

87. The method of wireless communication according to claim 83, wherein: The first signal includes code rate information, sequence information, or duty cycle information for periodic synchronization.

88. The method for wireless communication according to claim 87 further includes sending first information to the first communication device, wherein the first information is used to indicate code rate information, sequence information, or duty cycle information used for periodic synchronization in the first signal.

89. The method for wireless communication according to claim 87, wherein: When the first communication device or the second communication device detects a fixed code rate, the first signal is aligned with the time-frequency resources of the new air interface signal.

90. The method of wireless communication according to claim 87, wherein: When the second communication device continuously detects multiple change amounts or multiple change trends of the first signal, the first signal is aligned with the time-frequency resources of the new air interface signal.

91. The method of wireless communication according to claim 83, wherein: The first signal includes code rate information, sequence information, or duty cycle information for non-periodic synchronization.

92. The method for wireless communication according to claim 83 further includes sending second information to the first communication device, wherein the second information is used to indicate code rate information, sequence information, or duty cycle information used for non-periodic synchronization in the first signal.

93. The method of wireless communication according to claim 91, wherein: When the second communication device detects multiple change amounts or multiple change trends of the first signal within a fixed time, the first signal is aligned with the time-frequency resources of the new air interface signal.

94. The method of wireless communication according to claim 91, wherein: When the second communication device continuously detects predefined energy, the first signal is aligned with the time-frequency resources of the new air interface signal; or when the first communication device detects predefined energy within a fixed time, the first signal is aligned with the time-frequency resources of the new air interface signal.

95. A wireless communication method, executed on a second communication device, comprising: At least one information is sent to the first communication device, wherein the at least one information includes a selection signal or a paging signal, or a bearing channel of the at least one information is a PRDCH or a PDRCH or a control channel or a data channel.

96. The method of wireless communication according to claim 95, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

97. The method of wireless communication according to claim 95, wherein: The frame structure of the selection signal or paging signal includes grouping information / selection information and a delimiter. The delimiter is located before the grouping information / selection information and is used to indicate the starting time, duration or transmission opportunity of the grouping information / selection information.

98. The method of wireless communication according to claim 95, wherein: The frame structure of the selection signal or paging signal includes group information / selection information and preamble information, wherein the preamble information is located before the group information / selection information. After the second communication device sends the preamble information for synchronization, it sends the group information / selection information. The preamble information is used to indicate the starting time, duration or transmission opportunity of the group information / selection information transmission.

99. The method of wireless communication according to claim 95, wherein: The frame structure of the selection signal or paging signal includes grouping information / selection information and preamble information. The grouping information / selection information is located before the preamble information. The second communication device sends the grouping information / selection information and then sends the preamble information for synchronization.

100. The method of wireless communication according to claim 95, wherein: The frame structure of the PRDCH or PDRCH or control channel or data channel includes a delimiter and preamble information, and the grouping information / selection information is located before the preamble information. The second communication device sends the grouping information / selection information and then sends the preamble information for synchronization.

101. The method of wireless communication according to claim 95, wherein: The frame structure of the PRDCH or PDRCH or control channel or data channel includes any one of the following; Leading information; Preamble information and control information; Preamble information and data information; The preamble information, the control information and the data information; the control information; the data information; The control information and the data information.

102. The method of wireless communication according to claim 101, wherein: The frame structure of the PRDCH or PDRCH or control channel or data channel further includes delimiter or terminator indication information.

103. A wireless communication method, executed on a second communication device, comprising: Information is sent to the first communication device, where the information indicates a first communication device that needs to be repeatedly counted, a first communication device that needs to avoid repeated inventory, or an operation during inventory counting of multiple first communication devices.

104. The method of wireless communication according to claim 103, wherein: The first communication device is an environmental Internet of Things (AIOT) device, and the second communication device is a reader / writer, wherein the reader / writer is a base station or a user equipment.

105. The method of wireless communication according to claim 103, wherein: For the first communication device that has been inventoried, the second communication device sends the information again, where the information carries the ID information or random number information or temporary ID information of the first communication device that has been inventoried, and the information is used to activate the first communication device.

106. The method of wireless communication according to claim 104, wherein: If the information matches the ID information, random number information or temporary ID information of the first communication device that has been inventoried, a ready state for re-inventory is performed, where the ready state refers to an activated state or a state ready to be inventoried.

107. The method of wireless communication according to claim 104, wherein: After receiving the first signal from the second communication device, the process of sending the second signal, sending the first information, receiving the first response information, and sending the second information refers to the activation state, wherein the first signal is used to stimulate the first communication device, the second signal is used to provide paging information, selection information, and inquiry information, the first information is used to provide a query command, the first response information is used to respond to the first information, and the second information is used to provide scheduling information.

108. The method of wireless communication according to claim 107, wherein: The process in which the first communication device sends second response information to the second communication device after receiving the second information and the first communication device receives third information sent by the second communication device is referred to as a connected state, wherein the second response information is used to respond to the second information.

109. The method of wireless communication according to claim 108, wherein: The third information carries a first time window indicating that the first communication device is in an inactive state.

110. The method of wireless communication according to claim 109, wherein: If the first communication device receives the fourth information sent by the second communication device within the second time window, the first communication device enters the connected state; otherwise, the first communication device enters the deactivated state.

111. The method of wireless communication according to claim 110, wherein: After the first communication device reports the ID or data, it enters the inactive state and no longer enters the active state.

112. The method of wireless communication according to claim 110, wherein: If the first communication device receives the fourth information sent by the second communication device, the silent first communication device enters the activated state; or if the first communication device does not receive the fourth information within the silent time / activation waiting time period, the first communication device enters the deactivated state.

113. The method of wireless communication according to claim 110, wherein: If, during the second round of inventory counting, the information sent by the second communication device is the same as the information sent during the first round of inventory counting, the first communication device does not send a feedback signal to the second communication device.

114. The method of wireless communication according to claim 110, wherein: When the second communication device is a user equipment, the user equipment obtains the path loss and reports the user equipment ID or RSRP to the upper level.

115. The method of wireless communication according to claim 114, wherein: The user equipment sends a first signal. After the first communication device reflects the first signal, different user equipments measure different path losses. The user equipment corresponding to the smaller path loss reports the user equipment ID or RSRP to the base station. The user equipment receives relevant information sent by the base station for taking inventory of the first communication device.

116. The method of wireless communication according to claim 114, wherein: Multiple user devices send a first signal. After the first communication device measures the first signal, the user device receives the measurement value and corresponding ID reported by the first communication device. The user device corresponding to the smaller path loss reports the user device ID or RSRP to the base station, and the user device receives the relevant information sent by the base station for inventorying the first communication device.

117. The method of wireless communication according to claim 110, wherein: The second communication device receives user assistance information UAI reported by the first communication device during the previous inventory round, where the UAI includes at least one of the following: Insufficient power / energy storage information; Information on early termination of business; Control information / data information demodulation failure information.

118. A method of wireless communication, comprising: Sending or receiving data and / or signaling within a predefined first processing time, a second processing time, a third processing time, or a fourth processing time, wherein: The first processing time refers to the processing time between the reader-to-device R2D signal transmission or activation signal transmission and the device-to-reader D2R signal transmission; The second processing time refers to the processing time between the D2R signal transmission and the R2D signal transmission or the activation signal transmission; The third processing time refers to the processing time between two different consecutive R2D signal transmissions or two different consecutive activation signal transmissions to the same AIOT device; The fourth processing time refers to the processing time between two different consecutive D2R signal transmissions from the same AIOT device.

119. The method of wireless communication according to claim 118, wherein: The R2D signal transmission carries the activation signal.

120. The method of wireless communication according to claim 119, wherein: The activation signal is not included in the R2D signal transmission.

121. The method of wireless communication according to claim 118, wherein: The length of the first processing time refers to the minimum time interval between the R2D signal transmission or the activation signal transmission and the subsequent D2R signal transmission between the AIOT device and the reader / writer; The length of the second processing time refers to the minimum time interval between the D2R signal transmission and the subsequent corresponding R2D signal transmission or the subsequent corresponding activation signal transmission; The length of the third processing time refers to the minimum time interval between the two different consecutive R2D signal transmissions or two different consecutive activation signals to the same AIOT device; The length of the fourth processing time refers to the shortest time between the two different consecutive D2R signal transmissions from the same AIOT device.

122. The method of wireless communication according to claim 118, wherein: The processing time between the R2D signal transmission or the activation signal transmission and the D2R signal transmission refers to any one of the following: The time interval between the last transmission of downlink information and the first transmission of uplink information, where the downlink is the R2D signal transmission link and the uplink is the D2R signal transmission link; a time interval between a first information transmission of the downlink information and a last information transmission of the uplink information; a time interval between the first information transmission of the downlink information and the first information transmission of the uplink information; The time interval between the last information transmission of the downlink information and the last information transmission of the uplink information.

123. The method of wireless communication according to claim 122, wherein: The downlink information includes at least one of the following: a downlink preamble, downlink control information and / or downlink data information; the uplink information includes at least one of the following: an uplink preamble, uplink control information and / or uplink data information.

124. The method of wireless communication according to claim 122, wherein: The starting position of the downlink information is synchronously aligned with the symbol, time slot or time unit of the new air interface.

125. The method of wireless communication according to claim 118, wherein: The processing time between two different consecutive R2D signal transmissions or two different consecutive activation signal transmissions to the same AIOT device refers to any one of the following: a time interval between the last information transmission of first downlink information and the first information transmission of second downlink information, the first downlink being a first R2D signal transmission link, and the second downlink being a second R2D signal transmission link; a time interval between a first information transmission of the first downlink information and a last information transmission of the second downlink information; a time interval between the first information transmission of the first downlink information and the first information transmission of the second downlink information; A time interval between the last information transmission of the first downlink information and the last information transmission of the second downlink information.

126. The method of wireless communication according to claim 125, wherein: The first downlink information and the second downlink information are two adjacent R2D signal transmission link information transmitted at the same round-robin point.

127. The method of wireless communication according to claim 125, wherein: The first downlink information is the last R2D signal transmission link information of the first round of inventory transmission, and the second downlink information is the first R2D signal transmission link information of the second round of inventory transmission.

128. The method of wireless communication according to claim 118, wherein: The processing time between two different consecutive D2R signal transmissions from the same AIOT device refers to any of the following: a time interval between the last information transmission of the first uplink information and the first information transmission of the second uplink information, the first uplink being a first D2R signal transmission link, and the second uplink being a second D2R signal transmission link; a time interval between a first information transmission of the first uplink information and a last information transmission of the second uplink information; a time interval between the first information transmission of the first uplink information and the first information transmission of the second uplink information; A time interval between the last information transmission of the first uplink information and the last information transmission of the second uplink information.

129. The method of wireless communication according to claim 128, wherein: The first uplink information and the second uplink information are two adjacent D2R signal transmission link information transmitted at the same round-robin point.

130. The method of wireless communication according to claim 125, wherein: The first uplink information is the last D2R signal transmission link information of the first round of inventory transmission, and the second uplink information is the first D2R signal transmission link information of the second round of inventory transmission.

131. The method of wireless communication according to claim 118, wherein: The first processing time, the second processing time, the third processing time, or the fourth processing time is related to the demodulation time of the physical channel PRDCH or control channel or data channel carrying signaling from the reader to the device, the preparation time of the physical channel PDRCH or control channel or data channel carrying signaling from the device to the reader, or the power factor.

132. The method of wireless communication according to claim 131, wherein: The demodulation time of the signaling carried by the PRDCH, control channel, or data channel is related to the device capability, device type, or device operating mode.

133. The method of wireless communication according to claim 131, wherein: The device capability, the device type, or the device operating mode is related to the difference in device capability, time offset, energy storage capability, amplification capability, or frequency shift capability.

134. The method of wireless communication according to claim 131, wherein: The preparation time for the PDRCH to carry signaling includes the time it takes for the device to switch from a receiving state to a reflecting / transmitting state.

135. The method of wireless communication according to claim 131, wherein: The power factor related to the processing time is related to the stability of the reader / writer from power off to power on or the preparation time of the reader / writer being powered on again.

136. The method of wireless communication according to claim 131, wherein: The power factor related to the processing time is related to the stability of the AIOT device from power off to power on or the preparation time of the AIOT device to be powered on again.

137. A wireless communication device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 136.

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