Carrier transmission method and apparatus, device, medium and program product

Abstract

The present application relates to the field of wireless communication, and discloses a carrier transmission method and apparatus, a device, a medium, and a program product. The method comprises: performing device-to-reader (D2R) transmission on the basis of a first carrier and a second carrier, the first carrier being sent by a first communication device, and the second carrier being sent by a second communication device. An A-IoT device performs backscattering by means of multiple carriers, which can enhance the reliability of uplink transmission for the A-IoT device.

Description

Carrier transmission method, apparatus, device, medium and program product TECHNICAL FIELD

[0001] The present application relates to the field of wireless communication, in particular to a carrier transmission method, apparatus, device, medium and program product. BACKGROUND

[0002] If an ambient power enabled Internet of Things (A-IoT) device transmits in a backscattering communication mode, an external carrier wave needs to be provided for the A-IoT device.

[0003] In a case where the A-IoT device uses a single-tone for backscattering, if the channel quality of the single-tone is poor, the reception performance of the A-IoT device backscattering transmission is poor, and the reliability of the uplink transmission of the A-IoT device cannot be guaranteed.

[0004] SUMMARY

[0005] The present application provides a carrier transmission method, apparatus, device, medium and program product, which at least includes:

[0006] According to an aspect of an embodiment of the present application, a carrier transmission method is provided, which is executed by an A-IoT device, and the method includes:

[0007] performing D2R transmission based on a first carrier and a second carrier, the first carrier being sent by a first communication device, and the second carrier being sent by a second communication device.

[0008] According to another aspect of an embodiment of the present application, a carrier transmission method is provided, which is executed by a first communication device, and the method includes:

[0009] sending a first carrier to an A-IoT device, the first carrier and a second carrier being used for the A-IoT device to perform D2R transmission, the second carrier being sent by a second communication device.

[0010] According to another aspect of an embodiment of the present application, a carrier transmission method is provided, which is executed by a second communication device, and the method includes:

[0011] sending a second carrier to an A-IoT device, the second carrier and a first carrier being used for the A-IoT device to perform D2R transmission, the first carrier being sent by a first communication device.

[0012] According to an aspect of an embodiment of the present application, a carrier transmission apparatus is provided, which includes:

[0013] The sending module is configured to perform D2R transmission based on the first carrier and the second carrier, the first carrier being sent by the first communication device, and the second carrier being sent by the second communication device.

[0014] According to another aspect of the embodiments of the present application, a carrier transmission apparatus is provided, which comprises:

[0015] The sending module is configured to send the first carrier to the A-IoT device, the first carrier being used together with the second carrier for D2R transmission of the A-IoT device, and the second carrier being sent by the second communication device.

[0016] According to another aspect of the embodiments of the present application, a carrier transmission apparatus is provided, which comprises:

[0017] The sending module is configured to send the second carrier to the A-IoT device, the second carrier being used together with the first carrier for D2R transmission of the A-IoT device, and the first carrier being sent by the first communication device.

[0018] According to another aspect of the embodiments of the present application, a communication device is provided, which comprises a transceiver, and the communication device is configured to implement the carrier transmission method according to the above aspects.

[0019] According to an aspect of the embodiments of the present application, a communication device is provided, which comprises a processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor, wherein the processor is configured to load and execute the executable instructions to implement the carrier transmission method according to the above aspects.

[0020] According to an aspect of the embodiments of the present application, a computer readable storage medium is provided, which stores at least one program, and the at least one program is loaded and executed by a processor to implement the carrier transmission method according to the above aspects.

[0021] According to an aspect of the embodiments of the present application, a computer program product is provided, which comprises computer instructions stored in a computer readable storage medium, and a processor acquires the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to implement the carrier transmission method according to the above aspects.

[0022] According to an aspect of the embodiments of the present application, a chip is provided, which includes a programmable logic circuit and / or at least one program, and is configured to implement the carrier transmission method according to the above aspects based on the programmable logic circuit and / or the at least one program.

[0023] The technical solutions provided by the embodiments of the present application can have the following beneficial effects:

[0024] The A-IoT device supports D2R transmission through multiple carriers from different devices. Since the D2R transmission is implemented by using at least two carriers to realize backscatter, even if the channel quality of one of the carriers is poor, the A-IoT device can still perform D2R transmission through the other carrier, effectively ensuring the reliability of the D2R transmission. Moreover, since the first carrier and the second carrier come from different communication devices, a single communication device only needs to send a single-tone carrier, and the communication device does not need to split its own transmission power, which can ensure the coverage of the carrier and the uplink coverage of the D2R transmission. In addition, if the first communication device and the second communication device are at different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is conducive to the D2R transmission against channel fading. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0026] FIG. 1 shows a schematic diagram of an environment energy Internet of Things system according to an example embodiment of the present application;

[0027] FIG. 2 shows a schematic diagram of radio frequency energy harvesting according to an example embodiment of the present application;

[0028] FIG. 3 shows a schematic diagram of a backscatter communication process according to an example embodiment of the present application;

[0029] FIG. 4 shows a schematic diagram of resistance load modulation according to an example embodiment of the present application;

[0030] FIG. 5 shows a schematic diagram of a topology according to an example embodiment of the present application;

[0031] FIG. 6 shows a schematic diagram of a topology according to an example embodiment of the present application;

[0032] FIG. 7 shows a schematic diagram of a topology according to an example embodiment of the present application;

[0033] FIG. 8 shows a schematic diagram of a topology according to an example embodiment of the present application;

[0034] FIG. 9 shows a schematic diagram of a 4-step access according to an example embodiment of the present application;

[0035] FIG. 10 shows a schematic diagram of a 2-step access according to an example embodiment of the present application;

[0036] FIG. 11 shows a schematic diagram of a spectrum based on carrier backscattering according to an example embodiment of the present application;

[0037] FIG. 12 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0038] FIG. 13 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0039] FIG. 14 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0040] FIG. 15 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0041] FIG. 16 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0042] FIG. 17 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0043] FIG. 18 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0044] FIG. 19 shows a flow diagram of a carrier transmission method according to an example embodiment of the present application;

[0045] FIG. 20 shows a schematic diagram of a carrier transmission method according to an example embodiment of the present application;

[0046] FIG. 21 shows a schematic diagram of a carrier transmission method according to an example embodiment of the present application;

[0047] FIG. 22 shows a block diagram of a carrier transmission apparatus according to an example embodiment of the present application;

[0048] FIG. 23 shows a block diagram of a carrier transmission apparatus according to an example embodiment of the present application;

[0049] FIG. 24 shows a block diagram of a carrier transmission apparatus according to an example embodiment of the present application;

[0050] FIG. 25 shows a structural schematic diagram of a communication device according to an example embodiment of the present application;

[0051] FIG. 26 shows a structural schematic diagram of a communication device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0052] For the purpose of the present application, the technical solutions and advantages will be more apparent, the following will be further described in detail with the help of the accompanying drawings. Here will be described in detail, the example embodiments, which example is shown in the drawings. The following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The following example embodiments described in the embodiments are not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0053] The terms used in the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0054] It should be understood that although the terms first, second, third, etc. can be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another type of information. For example, without departing from the scope of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "in the case of" or "when" or "in response to determining". In this specification, when expressing the meaning expressed by the Boolean value, it is expressed as "0" representing "the first meaning", "1" representing "the second meaning", without loss of generality, those skilled in the art can understand that the representative meaning can be reversed, i.e. "1" represents "the first meaning", "0" represents "the second meaning".

[0055] Ambient Power Enabled Internet of Things (Ambient Power Enabled IoT), abbreviated as Ambient IoT or AMP IoT or A-IoT. Ambient Power Enabled Internet of Things can also be referred to as Zero Power Internet of Things or Passive Internet of Things. Accordingly, a device using A-IoT communication technology can be referred to as an A-IoT device or an AMP IoT device or an Ambient IoT device or a zero-power device.

[0056] A so-called A-IoT device refers to an IoT device that uses various ambient energy (such as wireless radio frequency energy, light energy, solar energy, thermal energy, kinetic energy, mechanical energy, etc.) to drive itself. An A-IoT device can have no energy storage capability, or can have very limited energy storage capability, such as using a capacitor with a capacity of tens of microfarads (μF). Compared with conventional IoT devices, A-IoT devices have many advantages such as no conventional battery, maintenance-free, small size, low complexity, low cost, long service life, etc.

[0057] The key technologies of A-IoT communication mainly include energy harvesting and backscattering communication technologies.

[0058] FIG. 1 shows an Ambient Power Enabled Internet of Things system 100 provided by an exemplary embodiment of the present application, which includes a network device 110 and an A-IoT device 120. The network device 110 is configured to send a wireless power signal and / or a downlink communication signal to the A-IoT device 120, and receive a backscattering signal of the A-IoT device 120 and / or a signal actively transmitted by the A-IoT device 120.

[0059] The network device 110 supports providing wireless communication functions, including but not limited to: a base station (BS), a node B (NB), an evolved node B (eNB), a next generation node B (gNB), a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a home evolved node B or home node B (HNB), a baseband unit (BBU), a remote radio unit (RRU), a distributed unit (DU), a wireless relay node, a wireless backhaul node, a transmission point (TP), a transmission and reception point (TRP), an antenna panel, a router, etc.

[0060] The A-IoT device 120 includes an energy harvesting module 221. Optionally, in addition to the energy harvesting module 221, the A-IoT device 120 also includes one or more of a backscattering communication module 222, a low-power computing module 223, a sensor module 224, and a memory (not shown in the figure). It should be understood that the modules included in the A-IoT device 120 shown in FIG. 1 are only an example and are not limiting.

[0061] For example, the energy harvesting module 221 can harvest environmental energy, such as radio frequency energy, light energy, kinetic energy, mechanical energy, solar energy, radiation energy, etc., thereby providing power for various modules of the A-IoT device 120. If the environmental energy harvested by the A-IoT device 120 is radio frequency energy, the signal used to provide the radio frequency energy can be referred to as a power supply signal.

[0062] In some embodiments, the harvesting of radio frequency energy is based on wireless radio frequency signals in the environment, that is, the energy supply signal is a wireless radio frequency signal in the environment. The wireless radio frequency signals in the environment include, for example, radio frequency signals of other communication systems, broadcast signals, etc. At this time, the energy harvesting mode of the A-IoT device 120 can be considered passive. The other communication systems refer to communication systems that do not contain the A-IoT device. At this time, the energy supply signal can use the physical layer technology supported by the other communication systems, for example, the energy supply signal is an Orthogonal Frequency Division Multiplexing (OFDM) signal.

[0063] In some embodiments, the harvesting of radio frequency energy is based on in-band wireless radio frequency signals, that is, the energy supply signal is an in-band wireless radio frequency signal. The in-band wireless radio frequency signals include, for example, signals transmitted using the time-frequency resources within the communication system containing the A-IoT device. Such energy supply signals help to ensure the energy harvesting efficiency and reliability. At this time, the energy supply signal can use the physical layer technology supported by the A-IoT device 120, for example, the energy supply signal is a simple waveform obtained by simple modulation.

[0064] After the A-IoT device 120 obtains energy, it can receive signals from the network device 110 through the receiver, reflect signals to the network device 110 through the backscatter communication module 222, or transmit signals to the network device 110 through the transmitter (not shown in the figure). The data reflected or transmitted by the A-IoT device 120 can be data stored by itself (such as an identity or pre-written information, such as the production date, brand, and manufacturer of a product). The sensor module 224 can include various sensors, and the A-IoT device 120 can report the data collected by the various sensors based on a low-power mechanism. The memory is used to store some basic information (such as an article identifier) or to obtain environmental temperature, environmental humidity, and other sensor data. Optionally, the sensor module 224 and the memory can be implemented as one module.

[0065] The A-IoT device 120 can use a low-power computing module 223 to implement simple signal demodulation, decoding, or encoding, modulation, and other simple arithmetic operations. The hardware design can be very simple, making the A-IoT device 120 very low in cost and very small in size.

[0066] Figure 2 shows a schematic diagram of radio frequency power harvesting by the energy harvesting module 221. Radio frequency power harvesting is based on the principle of electromagnetic induction, using the radio frequency module RF to connect through electromagnetic induction and a capacitor C and a load resistor RL in parallel, to achieve the collection of spatial electromagnetic wave energy, and to obtain the energy required to drive the A-IoT device to work, such as: for driving low-power demodulation modules, modulation modules, sensors, and memory reading, etc. Based on this, the A-IoT device does not need a traditional battery.

[0067] In backscatter communication, the backscatter signal can be modulated or not modulated. Figure 3 shows a schematic diagram of modulated backscatter communication. The transmit (TX) module 211 of the network device 110 transmits a wireless signal carrier 231 using an amplifier (AMP) 212, and the A-IoT device 120 receives and modulates the wireless signal carrier 231, loads the information to be transmitted using a low-power computing module 223, and collects radio frequency energy using an energy harvesting module 221. The A-IoT device 120 radiates the modulated reflected signal 232 using an antenna 216, and this information transmission process is called backscatter communication. The receive (RX) module 213 of the network device 110 receives the modulated reflected signal 232 using a low-noise amplifier (LNA) 214. Backscatter and load modulation are inseparable. Load modulation adjusts and controls the circuit parameters of the oscillation circuit of the A-IoT device 120 according to the beat of the data stream, so that the size of the impedance of the A-IoT device 120 and other parameters change, completing the modulation process.

[0068] Load modulation technology mainly includes resistance load modulation and capacitance load modulation. Figure 4 shows a schematic diagram of resistance load modulation. In resistance load modulation, the load resistor R L A third resistor R3 is connected in parallel, and a switch S controlled by binary coding is used to turn on or off, and the on-off of the third resistor R3 will cause the voltage on the circuit to change, and the load resistor R L The first capacitor C1 is connected in parallel, and the load resistor R LThe second resistor R2 is in series with the first resistor R1, and the first resistor R1 is in series with the first inductor L1. The first inductor L1 is coupled with the second inductor L2, and the second inductor L2 is in series with the second capacitor C2. In an example, amplitude shift keying (ASK) modulation can be implemented, i.e., the amplitude of the backscattering signal of the A-IoT device is adjusted to modulate and transmit the signal. Similarly, in a capacitive load modulation, the on-off of the capacitor can change the resonant frequency of the circuit, and frequency shift keying (FSK) modulation can be implemented, i.e., the operating frequency of the backscattering signal of the A-IoT device is adjusted to modulate and transmit the signal. As can be seen, the A-IoT device 120 can modulate the incoming signal by means of load modulation.

[0069] Therefore, the A-IoT device has the following advantages: (1) it does not actively transmit signals, and thus does not need a complex radio frequency link, such as a power amplifier (PA) and a radio frequency filter; (2) it does not need to actively generate high-frequency signals, and thus does not need a high-frequency crystal oscillator; and (3) by means of backscattering communication, the signal transmission does not consume its own energy.

[0070] The A-IoT device has many advantages, and thus can be widely applied in various industries, such as logistics, object identification, intelligent warehousing, smart agriculture, energy and power, industrial internet, smart wearable devices, smart home, smart control, environmental monitoring, positioning, and the like.

[0071] Specifically, from the perspective of energy sources and usage, the A-IoT device can be divided into the following three categories.

[0072] (1) Passive A-IoT device: Passive A-IoT device does not need to install a battery. When the passive A-IoT device approaches the network device (such as the reader of the RFID system), the passive A-IoT device is in the near field range formed by the antenna radiation of the network device. Therefore, the passive A-IoT device antenna generates an induced current through electromagnetic induction, and the induced current drives the low-power chip circuit of the passive A-IoT device. The work of demodulating the forward link signal (that is, the downlink, the link from the network device to the A-IoT device) and modulating the signal of the backward link (that is, the uplink, the link from the A-IoT device to the network device) is realized. For the backscatter link, the passive A-IoT device uses the backscatter communication mode for signal transmission. It can be seen that whether it is a forward link or a backward link, the passive A-IoT device does not need to install a battery to drive it, which is a truly A-IoT device. The passive A-IoT device does not need a battery, and the radio frequency circuit and the baseband circuit are very simple, for example, it does not need LNA, PA, crystal oscillator, analog to digital converter (ADC) and other devices, so it has many advantages such as small size, light weight, very cheap price and long service life.

[0073] (2) Semi-passive A-IoT device: The semi-passive A-IoT device itself does not install a conventional battery, but can use a radio frequency energy harvesting module to harvest radio wave energy, or use a solar energy / light energy / thermal energy / kinetic energy / mechanical energy harvesting module to harvest energy, and store the harvested energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can drive the low-power chip circuit of the semi-passive A-IoT device. The work of demodulating the forward link signal and modulating the signal of the backward link is realized. For the backscatter link, the semi-passive A-IoT device uses the backscatter communication mode for signal transmission. It can be seen that whether it is a forward link or a backward link, the semi-passive A-IoT device does not need to install a battery to drive it, although it uses the energy stored in the capacitor in the work, but the energy comes from the energy harvested by the energy harvesting module, so it is also a truly A-IoT device. The semi-passive A-IoT device inherits many advantages of the passive A-IoT device, so it has many advantages such as small size, light weight, very cheap price and long service life.

[0074] (3) Active A-IoT device: In some scenarios, active A-IoT devices can also be used, which can be built-in with a battery (a conventional battery such as a dry battery, a rechargeable lithium battery, etc.). The battery is used to drive the low-power chip circuit of the active A-IoT device. The battery is used to drive the low-power chip circuit of the active A-IoT device. The work of demodulating the forward link signal and modulating the backward link signal is realized. For the backscatter link, the active A-IoT device uses the backscatter communication mode for signal transmission. Therefore, the zero power consumption of the active A-IoT device mainly reflects that the signal transmission of the reverse link does not require the power of the device itself, but uses the backscatter mode. Although the active A-IoT device uses a battery, due to the use of ultra-low power communication technology, the power consumption is very low, so the working life of the battery can be greatly improved compared with the prior art. The active A-IoT device is powered by the built-in battery to increase the communication distance and improve the reliability of communication. Therefore, it can be applied in some scenarios with relatively high requirements for communication distance, reading delay, etc.

[0075] The service type of A-IoT is mainly industry service. According to the way in which the A-IoT device transmits data, the A-IoT device can be divided into the following three types:

[0076] (1) The device with a backscatter module uses the backscatter mode for uplink transmission. This type of device does not have an active transmitter for active transmission, but only has a transmitter with a backscatter module. Therefore, when performing uplink transmission, a carrier needs to be provided by other devices, and the device performs backscatter based on the carrier to realize uplink transmission.

[0077] (2) The device with an active transmitter uses an active transmitter with active transmission capability for uplink transmission, so the device can send uplink data using its own active transmitter without the need for external carrier. The active transmitter suitable for this type of device can be a low-power ASK transmitter, a low-power FSK transmitter, etc. Based on the current implementation, the overall power consumption of the device can be reduced to 400-600 μW when transmitting a signal of 100 μW.

[0078] (3) The device with both a backscatter module and an active transmitter supports both backscatter and active transmission. This type of device can determine whether to use backscatter or use an active transmitter for active transmission according to different situations (such as power, available environmental energy, etc.) or based on the scheduling of network devices.

[0079] The cellular Internet of Things (IoT) is booming, and some IoT technologies have been standardized by the 3rd Generation Partnership Project (3GPP), but there are still many IoT communication needs in various scenarios that have not been met, for example:

[0080] • Severe communication environment. Some IoT scenarios may face extreme environments such as high temperature, extremely low temperature, high humidity, high pressure, high radiation, or high-speed motion. For example, ultra-high voltage substations, high-speed train track monitoring, high-cold environment monitoring, industrial production lines, etc. In these scenarios, due to the working environment limitations of conventional power supplies, existing IoT terminals will not work. In addition, extreme working environments are also not conducive to the maintenance of IoT, such as replacing batteries.

[0081] • Extremely small terminal form factor requirements. Some IoT communication scenarios, such as food traceability, commodity circulation, and smart wearables, require terminals to have extremely small sizes to facilitate use in these scenarios. For example, IoT terminals for commodity management in the circulation link are usually in the form of electronic tags, which are embedded in commodity packaging in a very small form. For another example, lightweight wearable devices can improve user experience while meeting user needs.

[0082] • Extremely low-cost IoT communication requirements. Many IoT communication scenarios require IoT terminals to be low-cost enough to enhance competitiveness over other alternative technologies. For example, in logistics or warehousing scenarios, in order to facilitate the management of a large number of circulating goods, IoT terminals can be attached to each item to complete the precise management of the entire logistics process and cycle through communication between the terminal and the logistics network. These scenarios require IoT terminals to be competitively priced.

[0083] Therefore, in order to cover these unmet IoT communication needs, ultra-low-cost, extremely small, battery-free / maintenance-free IoT terminals are needed in cellular networks, and A-IoT can meet this demand.

[0084] Based on the discussion of A-IoT application scenarios by the 3GPP System Architecture (SA), A-IoT can be used in at least the following four scenarios: 1. Object identification, such as logistics, production line product management, and supply chain management. 2. Environmental monitoring, such as temperature, humidity, and harmful gas monitoring of working and natural environments. 3. Positioning, such as indoor positioning, smart object finding, and production line object positioning. 4. Intelligent control, such as intelligent control of various appliances in smart homes (turning on / off air conditioners, adjusting temperatures), and intelligent control of various facilities in agricultural greenhouses (automatic irrigation, fertilization).

[0085] 3GPP related study item discusses A-IoT devices, mainly including the following two types:

[0086] The first type of A-IoT device: with peak power consumption of several micro-watts (~1 μW), with energy storage capability, initial sampling frequency offset (SFO) up to 10 x ppm (Parts Per Million), without downlink amplifier and / or uplink amplifier, uplink transmission through backscattering of external carrier wave.

[0087] The second type of A-IoT device: with peak power consumption less than or equal to several hundred micro-watts (≤a few hundred μW peak power consumption), with energy storage capability, SFO up to 10 x ppm, with downlink amplifier and / or uplink amplifier. Uplink transmission can be generated internally, that is, based on active transmission, or through backscattering of external carrier wave.

[0088] 3GPP also discusses several services that A-IoT devices may participate in, each with corresponding service characteristics:

[0089] · Device-originated (DO) service: for A-IoT devices, it refers to a service in which A-IoT devices send signaling / data to network devices and / or intermediate nodes, which can be actively initiated by A-IoT devices or based on triggers. For example, ambient IoT data reporting, data transmission, signaling transmission, etc.

[0090] · Device-terminated (DT) service: for A-IoT devices, it refers to a service in which network devices and / or intermediate nodes send signaling / data to A-IoT devices. That is, DT mainly refers to making A-IoT devices perform specific actions through downlink commands, for example, in a smart home scenario, issuing a "turn on the air conditioner" command to A-IoT devices, and A-IoT devices performing corresponding operations.

[0091] • Device-Originated Autonomous (DO-A) service: For A-IoT devices, it refers to a service that is autonomously initiated by A-IoT devices to send signaling / data to network devices and / or intermediate nodes, which belongs to one of DO services. For example, A-IoT devices send alarm information to network devices and / or intermediate nodes.

[0092] • DO Device-Terminated Triggered (DO-DTT) service: A service that is initiated by A-IoT devices and terminated by A-IoT devices, triggered by network devices and / or intermediate nodes. That is, DO-DTT mainly refers to triggering A-IoT devices to report information through downlink commands, typical examples of which include asset inventory services and sensor sensing services. For example, A-IoT devices are triggered to report their identifier (ID) information or sensor data.

[0093] A-IoT devices can transceive A-IoT control / data / signals from readers, which can be network devices or intermediate nodes. The following two deployment scenarios / topologies are mainly considered, as shown in FIG. 5 and FIG. 6, respectively.

[0094] Deployment scenario 1 with Topology 1: As shown in FIG. 5, network devices and A-IoT devices directly communicate with each other in both directions. The network device that sends signaling / data to A-IoT devices and the network device that receives signaling / data sent by A-IoT devices can be the same or different.

[0095] Deployment scenario 2 with Topology 2: As shown in FIG. 6, A-IoT devices and intermediate nodes communicate with each other in both directions, and the intermediate nodes can relay signaling and / or data between network devices and A-IoT devices. Optionally, the intermediate node is a UE under network control. Optionally, the intermediate node is located indoors.

[0096] In this application, the transmission from the reader to the A-IoT device is called Reader to Device (R2D) transmission, and the transmission from the device to the reader is called Device to Reader (D2R) transmission.

[0097] Further, the topology shown in FIG. 5 can be refined into the four cases shown in FIG. 7. In (a) to (d) of FIG. 7, a reader is exemplarily illustrated as a base station (BS).

[0098] As shown in (a) of FIG. 7, R2D transmission is from Reader 1 to the A-IoT device, and D2R transmission is from the A-IoT device to Reader 2, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are not the same reader. When the A-IoT device performs D2R transmission, Reader 1 provides a carrier wave for backscattering for the A-IoT device to complete the D2R transmission.

[0099] As shown in (b) of FIG. 7, R2D transmission is from Reader to the A-IoT device, and D2R transmission is from the A-IoT device to Reader, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are the same reader. When the A-IoT device performs D2R transmission, the Reader can provide a carrier wave for backscattering for the A-IoT device to complete the D2R transmission.

[0100] As shown in (c) of FIG. 7, R2D transmission is from Reader to the A-IoT device, and D2R transmission is from the A-IoT device to Reader, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are the same reader. Different from (b) of FIG. 7, when the A-IoT device performs D2R transmission, a dedicated carrier wave node (CWN) provides a carrier wave for backscattering for the A-IoT device to complete the D2R transmission.

[0101] As shown in (d) of FIG. 7, R2D transmission is from Reader to the A-IoT device, and D2R transmission is from the A-IoT device to Reader, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are the same reader. In this scenario, since the A-IoT device performs D2R transmission in an active emission manner rather than a backscattering manner, there is no need to provide a carrier wave for the A-IoT device.

[0102] The topology shown in FIG. 6 can be further refined into the four cases shown in FIG. 8. In (a) to (d) of FIG. 8, a reader is exemplarily illustrated as an intermediate node.

[0103] As shown in (a) of FIG. 8, R2D transmission is from Reader 1 to A-IoT device, and D2R transmission is from A-IoT device to Reader 2, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are not the same reader. When A-IoT device performs D2R transmission, Reader 1 provides carrier for backscattering for A-IoT device to complete D2R transmission. Moreover, Reader 1 and Reader 2 are controlled by network, i.e., Reader 1 and Reader 2 perform uplink transmission and / or downlink transmission with network device (e.g., BS) respectively.

[0104] As shown in (b) of FIG. 8, R2D transmission is from Reader to A-IoT device, and D2R transmission is from A-IoT device to Reader, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are the same reader. When A-IoT device performs D2R transmission, the Reader can provide carrier for backscattering for A-IoT device to complete D2R transmission. Moreover, the Reader is controlled by network, i.e., the Reader performs uplink transmission and / or downlink transmission with network device (e.g., BS).

[0105] As shown in (c) of FIG. 8, R2D transmission is from Reader to A-IoT device, and D2R transmission is from A-IoT device to Reader, i.e., the sending end of R2D transmission and the receiving end of D2R transmission are the same reader. Different from (b) of FIG. 8, when A-IoT device performs D2R transmission, a special CWN provides carrier for backscattering for A-IoT device to complete D2R transmission. Moreover, the Reader is controlled by network, i.e., the Reader performs uplink transmission and / or downlink transmission with network device (e.g., BS). Moreover, the CWN is also controlled by network device or controlled by Reader. If the CWN is controlled by network device, the CWN performs uplink transmission and / or downlink transmission with network device. If the CWN is controlled by Reader, the CWN performs uplink (UL) transmission, downlink (DL) transmission, and sidelink (SL) transmission with Reader.

[0106] As shown in (d) of FIG. 8, the R2D transmission is from the Reader to the A-IoT device, and the D2R transmission is from the A-IoT device to the Reader, i.e., the sending end of the R2D transmission and the receiving end of the D2R transmission are the same Reader. In this scenario, since the A-IoT device performs the D2R transmission in an active transmission manner rather than a backscattering manner, the A-IoT device does not need to be provided with a carrier. Moreover, the Reader is controlled by the network, i.e., the Reader performs uplink transmission and / or downlink transmission with a network device (e.g., a BS).

[0107] The A-IoT device can adopt a 4-step or 2-step access manner.

[0108] For the 4-step access manner, an example can be referred to FIG. 9. The Reader sends a Query message to trigger the A-IoT device to access or inventory. After receiving the Query message, the A-IoT device sends a random identifier to the Reader. After receiving the random identifier, the Reader feeds back a Response message to the A-IoT device, the Response message also includes the random identifier, and the random identifier is the same as the random identifier reported by the A-IoT device. If the random identifier received by the A-IoT device is consistent with the random identifier sent by the A-IoT device, the A-IoT device sends an Electronic Product Code (EPC) to the Reader. After successfully receiving the EPC, the Reader sends a QueryRep message, which can be used to indicate to the A-IoT device that the EPC has been successfully received. It can be understood that, in the above process, if the A-IoT device does not successfully receive the Response message or the QueryRep message, or the identifier carried in the Response message or the QueryRep message received by the A-IoT device does not match the identifier of the A-IoT device, the A-IoT device considers that the access fails.

[0109] For the 2-step access manner, an example can be referred to (a), (b), and (c) of FIG. 10.

[0110] In (a) of FIG. 10, the Reader sends a Query message to trigger the A-IoT device to access or inventory. After receiving the Query message, the A-IoT device sends a random identifier to the Reader, and the resource of the random identifier is associated with the resource of an EPC, so the A-IoT device also sends the EPC associated with the random identifier. After successfully receiving the random identifier and the EPC, the Reader sends a QueryRep message, which can be used to indicate to the A-IoT device that the random identifier and the EPC have been successfully received.

[0111] In (b) of FIG. 10, Reader sends Query message to trigger A-IoT device to access or inventory. A-IoT device sends its EPC after receiving Query message. Reader sends QueryRep message after successfully receiving EPC. The QueryRep message can be used to indicate A-IoT device that EPC has been successfully received. The difference between (a) and (b) of FIG. 10 is whether random identity needs to be sent. It can be understood that if A-IoT device does not successfully receive QueryRep message, or the identity carried in the received QueryRep message does not match the identity of A-IoT device, A-IoT device considers that access fails.

[0112] In (c) of FIG. 10, Reader sends Query message to trigger A-IoT device to access or inventory. A-IoT device sends random identity and EPC to Reader after receiving Query message. Reader sends QueryRep message after successfully receiving random identity and EPC. The QueryRep message can be used to indicate A-IoT device that random identity and EPC have been successfully received. The difference between (a) and (c) of FIG. 10 is whether random identity and EPC are sent respectively. For example, in (a), random identity and EPC are sent in two different messages, while in (c), random identity and EPC are sent in the same message. For another example, in (a), random identity and EPC are sent on two different resources, while in (c), random identity and EPC are sent on the same resource.

[0113] The Query message or Query command shown in FIG. 9 and FIG. 10, and the QueryRep message or QueryRep command.

[0114] The Query message or QueryRep message shown in FIG. 9 and FIG. 10 can also be a Paging message.

[0115] Optionally, the Query message shown in FIG. 9 and FIG. 10 can be replaced by QueryRep message. That is, in 4-step access mode and / or 2-step access mode, QueryRep message can be used as the first message sent by Reader.

[0116] The random identifier shown in FIG. 9 and FIG. 10 can also be referred to as a temporary identifier, which is an N-bit random or pseudo-random number, N being a positive integer. For example, the random identifier is a 16-bit random or pseudo-random number (RN16), or the random identifier is a 32-bit random or pseudo-random number (RN32), and of course, N can also be other positive integers other than 16 or 32.

[0117] In some embodiments, the random identifier has the function of temporarily identifying the A-IoT device. For example, based on the random identifier, a certain A-IoT device can be temporarily identified in a certain time domain resource and / or a certain frequency domain resource.

[0118] When the A-IoT device performs backscattering, the CWN or the intermediate node or the network device provides a carrier for the A-IoT device to perform backscattering, which can be a Single-tone Carrier Wave or a Multi-tone Carrier Wave. Referring to FIG. 11, FIG. 11(a) shows a frequency spectrum diagram of the A-IoT device performing backscattering based on a Single-tone Carrier Wave, and FIG. 11(b) shows a frequency spectrum diagram of the A-IoT device performing backscattering based on a Multi-tone Carrier Wave.

[0119] Compared with Single-tone, the advantage of Multi-tone is that if the channel quality corresponding to the Single-tone carrier is poor, it will affect the reception performance of the modulation waveform of the A-IoT device backscattering, but if the Multi-tone carrier is used, even if the channel quality corresponding to part of the carrier is poor, the A-IoT device can still perform backscattering through another part of the carrier, thereby ensuring the reliability of the uplink transmission of the A-IoT device.

[0120] In the scenario of using a Multi-tone carrier, if multiple carriers are sent simultaneously by the same node (CWN or intermediate node or network device), the transmission power of this node needs to be allocated to multiple carriers at the same time. It can be understood that the smaller the transmission power, the shorter the coverage distance of the signal, and therefore, such a Multi-tone carrier transmission scheme will negatively affect the coverage of the carrier and the uplink coverage of the A-IoT device based on the carrier.

[0121] To this end, the present application takes Two-tone in Multi-tone as an example, and provides a carrier transmission method, which helps to guarantee the coverage and reliability of uplink transmission of the A-IoT device.

[0122] FIG. 12 shows a flowchart of a carrier transmission method provided by an example embodiment of the present application, which is performed by an A-IoT device. The method includes at least part of the following steps:

[0123] Step 1220: performing D2R transmission based on the first carrier and the second carrier, the first carrier being sent by the first communication device, and the second carrier being sent by the second communication device.

[0124] The A-IoT device performs D2R transmission based on the first carrier and the second carrier in a backscattering communication mode. That is, the A-IoT device sends signals and / or data based on the first carrier and the second carrier in a backscattering communication mode.

[0125] In some embodiments, the first communication device is a CWN, or a network device (such as a base station, which can refer to the network device 110 shown in FIG. 1), or an intermediate node, or other devices supporting the A-IoT device to provide carriers. The second communication device is a CWN, or a network device, or an intermediate node, or other devices supporting the A-IoT device to provide carriers. And, the first communication device and the second communication device are different devices. Therefore, the first carrier and the second carrier are sent by two different nodes to the A-IoT device respectively.

[0126] Among them, the intermediate node can be a user equipment (User Equipment, UE), but it does not exclude the case that the intermediate node is a repeater (Relay), an integrated access backhaul (Integrated Access Backhaul, IAB) node, a repeater (Repeater) and other devices.

[0127] In conclusion, the method provided by the embodiments of the present application supports the A-IoT device to perform D2R transmission through multiple carriers from different devices. Since the D2R transmission is implemented by using at least two carriers to realize backscattering, even if the channel quality of one of the carriers is poor, the A-IoT device can still perform D2R transmission through the other carrier, effectively ensuring the reliability of the D2R transmission. Moreover, since the first carrier and the second carrier come from different communication devices, a single communication device only needs to send a single-tone carrier, and the communication device does not need to split its own transmission power, which can ensure the coverage of the carrier and the uplink coverage of the D2R transmission. In addition, if the first communication device and the second communication device are at different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is conducive to the D2R transmission against channel fading.

[0128] On the basis of the embodiment shown in FIG. 12, step 1220 can be further implemented as step 1320, as shown in FIG. 13.

[0129] FIG. 13 shows a flowchart of a carrier transmission method provided by an example embodiment of the present application, which is performed by an A-IoT device. The method includes at least part of the following steps:

[0130] Step 1320: performing D2R transmission to the first communication device based on the first carrier and the second carrier, the first carrier being sent by the first communication device, and the second carrier being sent by the second communication device.

[0131] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier; and / or, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier.

[0132] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of the following:

[0133] · the time domain start position of the first carrier is aligned with the time domain start position of the second carrier;

[0134] · the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to the first time domain interval;

[0135] · the time domain end position of the first carrier is aligned with the time domain end position of the second carrier;

[0136] · the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to the second time domain interval.

[0137] The first time domain interval is preconfigured, agreed by a communication protocol, configured by the network device, configured by the intermediate node, or configured by the CWN. The second time domain interval is preconfigured, agreed by a communication protocol, configured by the network device, configured by the intermediate node, or configured by the CWN.

[0138] In some embodiments, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of the following:

[0139] The interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the coherence bandwidth of the channel.

[0140] The interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the bandwidth of the D2R transmission.

[0141] The frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

[0142] In some embodiments, the D2R transmission includes one or more of the following: a random identifier (or temporary identifier); a device identifier; a command-based feedback message; a feedback message based on a Query message; a feedback message based on a QueryRep message; a feedback message based on a paging message. The random identifier is, for example, RN16 or RN32, etc.

[0143] In some embodiments, the device identifier includes one or more of the following: an EPC, a network identifier (Network ID), an access identifier (Access ID), a physical identifier (Physical ID), a hardware identifier.

[0144] In some embodiments, the bandwidth of the D2R transmission can also be understood as the bandwidth of the physical device to reader channel (PDRCH); or the bandwidth of the D2R transmission includes the physical resource block (PRB) occupied by the D2R transmission; or the bandwidth of the D2R transmission includes the channel occupied by the D2R transmission; or the bandwidth of the D2R transmission includes the subcarrier occupied by the D2R transmission; or the bandwidth of the D2R transmission includes the frequency range occupied by the D2R transmission; or the bandwidth of the D2R transmission includes the raster occupied by the D2R transmission.

[0145] In some embodiments, the first carrier is transmitted by the first communication device to the A-IoT device under the condition that a first condition and / or a second condition are met.

[0146] In the embodiments of the present application, the time domain position and / or the frequency domain position of the first carrier and the second carrier can be autonomously determined by the sender, or can be indicated by other devices. Here, three indication schemes are exemplarily provided.

[0147] I. The position of the second carrier is indicated by the first communication device to the second communication device through the first signaling.

[0148] In some embodiments, the time domain position and / or the frequency domain position of the second carrier is indicated by the first signaling, which is sent by the first communication device to the second communication device.

[0149] In some embodiments, the first signaling is also used to trigger or schedule the second communication device to send the second carrier.

[0150] In some embodiments, the first signaling is sent by the first communication device to the second communication device under the condition that the first condition and / or the second condition is met.

[0151] II. The position of the first carrier and / or the position of the second carrier is indicated by the network device through the third signaling.

[0152] In some embodiments, the first carrier and / or the second carrier meets one or more of the following conditions: the time domain position of the first carrier is indicated by the third signaling; the frequency domain position of the first carrier is indicated by the third signaling; the time domain position of the second carrier is indicated by the third signaling; the frequency domain position of the second carrier is indicated by the third signaling. The third signaling is sent by the network device.

[0153] Exemplarily, the time domain position and / or the frequency domain position of the first carrier is indicated by the third signaling, and the third signaling does not indicate the time domain position and the frequency domain position of the second carrier.

[0154] Exemplarily, the time domain position and / or the frequency domain position of the second carrier is indicated by the third signaling, and the third signaling does not indicate the time domain position and the frequency domain position of the first carrier.

[0155] Exemplarily, the time domain position and / or the frequency domain position of the first carrier is indicated by the third signaling, and the time domain position and / or the frequency domain position of the second carrier is indicated by the third signaling.

[0156] In some embodiments, the third signaling is also used to trigger or schedule the first communication device to send the first carrier. Optionally, the third signaling contains the random identifier of the first communication device, or the device identifier, or the truncated random identifier, or the truncated device identifier. Optionally, the third signaling is scrambled by the random identifier of the first communication device, or the third signaling is scrambled by the device identifier of the first communication device, or the third signaling is scrambled by the truncated random identifier of the first communication device, or the third signaling is scrambled by the truncated device identifier of the first communication device.

[0157] In some embodiments, the third signaling is further used to trigger or schedule the first communication device to transmit the first carrier. Optionally, the third signaling comprises a random identity of the first communication device, or a device identity of the first communication device, or a truncated random identity of the first communication device, or a truncated device identity of the first communication device. Optionally, the third signaling is scrambled by the random identity of the first communication device, or the third signaling is scrambled by the device identity of the first communication device, or the third signaling is scrambled by the truncated random identity of the first communication device, or the third signaling is scrambled by the truncated device identity of the first communication device.

[0158] In some embodiments, the third signaling is sent by the network device based on second signaling, the second signaling being used to request scheduling the carrier transmission. The second signaling is sent by the first communication device to the network device in case that the first condition and / or the second condition is met.

[0159] In some embodiments, the third signaling is transmitted in a groupcast or broadcast manner.

[0160] III. The location of the first carrier is indicated by the network device through the third signaling, and / or the location of the second carrier is indicated by the network device through the fourth signaling.

[0161] In some embodiments, the time domain location and / or the frequency domain location of the first carrier is indicated by the third signaling, the third signaling being sent by the network device.

[0162] In some embodiments, the third signaling is further used to trigger or schedule the first communication device to transmit the first carrier. Optionally, the third signaling comprises a random identity of the first communication device, or a device identity of the first communication device, or a truncated random identity of the first communication device, or a truncated device identity of the first communication device. Optionally, the third signaling is scrambled by the random identity of the first communication device, or the third signaling is scrambled by the device identity of the first communication device, or the third signaling is scrambled by the truncated random identity of the first communication device, or the third signaling is scrambled by the truncated device identity of the first communication device.

[0163] In some embodiments, the time domain location and / or the frequency domain location of the second carrier is indicated by the fourth signaling, the fourth signaling being sent by the network device.

[0164] In some embodiments, the fourth signaling is further used to trigger or schedule the second communication device to transmit the second carrier. Optionally, the fourth signaling comprises a random identity of the second communication device, or a device identity of the second communication device, or a truncated random identity of the second communication device, or a truncated device identity of the second communication device. Optionally, the fourth signaling is scrambled by the random identity of the second communication device, or the fourth signaling is scrambled by the device identity of the second communication device, or the fourth signaling is scrambled by the truncated random identity of the second communication device, or the fourth signaling is scrambled by the truncated device identity of the second communication device.

[0165] In some embodiments, the third signaling and / or the fourth signaling is sent by the network device based on the second signaling, the second signaling being used to request the scheduling of the carrier transmission. The second signaling is sent by the first communication device to the network device in case that the first condition and / or the second condition is met.

[0166] Further, the first condition and the second condition in the above three schemes are designed in the embodiments of the present application.

[0167] In some embodiments, the first condition comprises one or more of the following:

[0168] the number of times that the first communication device does not receive the corresponding D2R transmission after sending the R2D transmission is greater than or equal to a first threshold value;

[0169] the number of times that the first communication device fails to receive the D2R transmission is greater than or equal to a second threshold value;

[0170] the received signal measurement value obtained by the first communication device is less than or equal to a third threshold value.

[0171] In some embodiments, the R2D transmission comprises one or more of the following: Query message; QueryRep message; paging message; feedback message based on random identification; feedback message based on device identification; Command.

[0172] In some embodiments, the first threshold value is pre-configured, or agreed by the communication protocol, or configured by the network device, or configured by the intermediate node, or configured by the CWN, or implementation specific to the first communication device. For example, the first threshold value is an integer greater than or equal to 0, such as 0 or 1 or 2 or other positive integers.

[0173] In some embodiments, the second threshold value is pre-configured, or agreed by the communication protocol, or configured by the network device, or configured by the intermediate node, or configured by the CWN, or implementation specific to the first communication device. For example, the second threshold value is an integer greater than or equal to 0, such as 0 or 1 or 2 or other positive integers.

[0174] In some embodiments, the third threshold value is pre-configured, or agreed by the communication protocol, or configured by the network device, or configured by the intermediate node, or configured by the CWN, or implementation specific to the first communication device. For example, the third threshold value is greater than or equal to 0, such as 0 or 1 or 2 or other real numbers. Optionally, the unit of the third threshold value is decibel (db) or decibel milliwatt (dbm).

[0175] However, the present application does not exclude the case where the first condition does not exist “first threshold” and “second threshold”. Exemplarily, the first condition includes one or more of the following: the first communication device does not receive the corresponding D2R transmission after sending the R2D transmission; the first communication device fails to receive the D2R transmission; the first communication device obtains a received signal measurement value less than or equal to a third threshold.

[0176] In some embodiments, the received signal measurement value is represented by any one or more of the following parameters: Reference Signal Received Power (RSRP), Received Signal Strength Indication (RSSI), Reference Signal Receiving Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal-to-Noise Ratio (SNR), received power measured based on the preamble in the D2R transmission, received power measured based on the midamble in the D2R transmission, received power measured based on the postamble in the D2R transmission, received power measured based on the PDRCH.

[0177] In some embodiments, the second condition includes one or more of the following:

[0178] • the number of times the first communication device sends the fifth signaling is greater than or equal to a fourth threshold, the fifth signaling being used to indicate the transmission power of the second communication device;

[0179] • the number of times the first communication device sends the sixth signaling is greater than or equal to a fifth threshold, the sixth signaling being used to request the network device to indicate the transmission power of the first communication device and / or the second communication device;

[0180] • the number of times the first communication device adjusts the transmission power is greater than or equal to a sixth threshold.

[0181] In some embodiments, the fourth threshold is pre-configured, or agreed by the communication protocol, or configured by the network device, or configured by the intermediate node, or configured by the CWN, or depends on the implementation of the first communication device. Exemplarily, the fourth threshold is an integer greater than 0, such as 1 or 2 or other positive integers.

[0182] In some embodiments, the fifth threshold value is preconfigured, or agreed by a communication protocol, or configured by the network device, or configured by the intermediate node, or configured by the CWN, or depends on implementation of the first communication device. For example, the fifth threshold value is an integer greater than 0, such as 1 or 2 or other positive integer.

[0183] In some embodiments, the sixth threshold value is preconfigured, or agreed by a communication protocol, or configured by the network device, or configured by the intermediate node, or configured by the CWN, or depends on implementation of the first communication device. For example, the sixth threshold value is an integer greater than 0, such as 1 or 2 or other positive integer.

[0184] However, the present application does not exclude the case where the second condition does not exist "fourth threshold value", "fifth threshold value" and "sixth threshold value". For example, the second condition includes one or more of the following: the first communication device sends the fifth signaling; the first communication device sends the sixth signaling; the first communication device adjusts the transmission power.

[0185] In some embodiments, the fifth signaling is used to indicate the transmission power of the second communication device, and it can also be understood that the fifth signaling is used to adjust the transmission power of the second communication device.

[0186] In some embodiments, the sixth signaling is used to request the network device to indicate the transmission power of the first communication device and / or the second communication device, and it can also be understood that the sixth signaling is used to request the network device to adjust the transmission power of the first communication device and / or the second communication device.

[0187] In the embodiments of the present application, adjusting the transmission power can be increasing the transmission power or decreasing the transmission power. However, from the perspective of improving coverage and reliability, the transmission power should be mainly increased. If from the perspective of saving power consumption, the transmission power should be mainly decreased. In short, how to adjust the transmission power of the first communication device and the second communication device can be referred to the actual communication demand and energy saving demand.

[0188] The above-mentioned first condition and second condition can be used alone or in combination.

[0189] For example, after the first communication device meets the first condition, the fifth signaling is sent, and the fifth signaling is used to indicate the transmission power of the second communication device. For example, it is used to indicate increasing the transmission power of the second communication device. In the case where the number of times of sending the fifth signaling by the first communication device is greater than or equal to the fourth threshold value, if the first condition is still met, the first communication device sends the first signaling or sends the first carrier.

[0190] For example, the first communication device sends the sixth signaling for requesting the network device to increase the transmission power of the second communication device after the first condition is met. The network device sends the seventh signaling to the second communication device, and the seventh signaling is used to indicate to increase the transmission power of the second communication device. For another example, the first communication device sends the sixth signaling for requesting the network device to increase the transmission power of the first communication device after the first condition is met. The network device sends the seventh signaling to the first communication device, and the seventh signaling is used to indicate to increase the transmission power of the first communication device. In a case where the number of times that the first communication device sends the sixth signaling is greater than or equal to the fifth threshold value, if the first condition is still met, the first communication device sends the first signaling or the second signaling.

[0191] For example, the first communication device increases the transmission power of the first communication device after the first condition is met. In a case where the number of times that the first communication device increases the transmission power is greater than or equal to the sixth threshold value, if the first condition is still met, the first communication device sends the first signaling or the second signaling.

[0192] In summary, the method provided by the embodiments of the present application supports the A-IoT device to perform D2R transmission through multiple carriers from different devices, and can effectively guarantee the reliability of D2R transmission, the coverage of the carriers, and the uplink coverage of D2R transmission. In addition, if the first communication device and the second communication device are at different positions, such as different directions relative to the A-IoT device, a spatial gain can be further provided, which is beneficial to D2R transmission against channel fading. Moreover, the time-frequency domain positions of the first carrier and the second carrier are designed in detail, and a specific and feasible scheme is provided for carrier transmission.

[0193] FIG. 14 shows a flowchart of a carrier transmission method provided by an example embodiment of the present application, which is performed by a first communication device. The method includes at least part of the following steps:

[0194] Step 1420: sending a first carrier to an A-IoT device, the first carrier and a second carrier being used by the A-IoT device to perform D2R transmission, and the second carrier being sent by a second communication device.

[0195] In some embodiments, the first communication device is a CWN, or a network device (such as a base station, which can refer to the network device 110 shown in FIG. 1), or an intermediate node, or other devices supporting providing carriers for A-IoT devices. The second communication device is a CWN, or a network device, or an intermediate node, or other devices supporting providing carriers for A-IoT devices. Moreover, the first communication device and the second communication device are different devices. Therefore, the first carrier and the second carrier are sent to the A-IoT device by two different nodes respectively.

[0196] The intermediate node can be a UE, but it does not exclude the case that the intermediate node is a Relay, an IAB node, a Repeater, or other devices.

[0197] The first carrier and the second carrier are used for the A-IoT device to perform D2R transmission in a backscattering communication mode, that is, the A-IoT device transmits signals and / or data in the backscattering communication mode based on the first carrier and the second carrier.

[0198] In summary, the method provided by the embodiments of the present application supports the first communication device providing the first carrier for the A-IoT device, and the A-IoT device performing D2R transmission using the first carrier provided by the first communication device and the second carrier provided by the second communication device. Since D2R transmission is implemented by using at least two carriers for backscattering, even if the channel quality of one of the carriers is poor, the A-IoT device can still perform D2R transmission through the other carrier, effectively ensuring the reliability of D2R transmission. Moreover, since the first carrier and the second carrier come from different communication devices, the first communication device only needs to send a single-tone carrier, and the first communication device does not need to split its own transmission power, which can ensure the coverage of the carrier and the uplink coverage of D2R transmission. In addition, if the first communication device and the second communication device are at different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is conducive to D2R transmission against channel fading.

[0199] On the basis of the embodiment shown in FIG. 14, step 1420 can be further implemented as step 1510, as shown in FIG. 15. Optionally, the first communication device further performs one or more of the following optional steps: step 1520, step 1530, step 1540, step 1550, step 1560, and step 1570.

[0200] FIG. 15 shows a flowchart of a carrier transmission method provided by an example embodiment of the present application, which is performed by a first communication device. The method includes at least part of the following steps:

[0201] Step 1510: sending a first carrier to an A-IoT device.

[0202] The first carrier and the second carrier are used for the A-IoT device to perform D2R transmission, and the second carrier is sent by a second communication device.

[0203] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier; and / or, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier.

[0204] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of: the time domain start position of the first carrier is aligned with the time domain start position of the second carrier; the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to the first time domain interval; the time domain end position of the first carrier is aligned with the time domain end position of the second carrier; the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to the second time domain interval.

[0205] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of: the time domain start position of the first carrier is aligned with the time domain start position of the second carrier; the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to the first time domain interval; the time domain end position of the first carrier is aligned with the time domain end position of the second carrier; the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to the second time domain interval.

[0206] In some embodiments, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of: the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the coherence bandwidth of the channel; the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the bandwidth of the D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

[0207] In some embodiments, the D2R transmission includes one or more of: a random identifier (or temporary identifier); a device identifier; a command-based feedback message; a feedback message based on a Query message; a feedback message based on a QueryRep message; a feedback message based on a paging message. The random identifier is, for example, RN16 or RN32, etc.

[0208] In some embodiments, the device identifier includes one or more of: an EPC, a Network Identity (Network ID), an Access ID, a Physical ID, a hardware identifier.

[0209] In some embodiments, the first communication device sends the first carrier to the A-IoT device in the case that the first condition and / or the second condition are met.

[0210] Step 1520: sending the first signaling to the second communication device.

[0211] The first signaling is used to indicate the time domain position and / or the frequency domain position of the second carrier.

[0212] In some embodiments, the first signaling is further used to trigger or schedule the second communication device to send the second carrier.

[0213] In some embodiments, the first communication device sends the first signaling to the second communication device in case that the first condition and / or the second condition is met.

[0214] Step 1530: sending fifth signaling to the second communication device.

[0215] The fifth signaling is used for indicating the transmission power of the second communication device. Optionally, the first communication device sends the fifth signaling to the second communication device in case that the first condition is met.

[0216] Step 1540: sending sixth signaling to the network device.

[0217] The sixth signaling is used for requesting the network device to indicate the transmission power of the first communication device and / or the second communication device. Optionally, the first communication device sends the sixth signaling to the network device in case that the first condition is met.

[0218] Step 1550: receiving seventh signaling.

[0219] The seventh signaling is sent by the network device based on the sixth signaling. The seventh signaling is used for adjusting the transmission power of the communication device.

[0220] In some embodiments, the seventh signaling is used for indicating to increase the transmission power of the first communication device and / or the transmission power of the second communication device.

[0221] Step 1560: adjusting the transmission power.

[0222] In some embodiments, the first communication device adjusts the transmission power of the first carrier, such as increasing the transmission power of the first carrier, in case that the first condition is met.

[0223] In some embodiments, the first communication device adjusts the transmission power of the first carrier, such as increasing the transmission power of the first carrier, according to the indication of the seventh signaling.

[0224] Step 1570: receiving D2R transmission of the A-IoT device.

[0225] The first communication device receives the D2R transmission of the A-IoT device based on the first carrier and the second carrier. That is, the first communication device receives the signal and / or data transmitted by the A-IoT device based on the first carrier and the second carrier in a backscattering communication manner.

[0226] Other contents of the embodiments of the present application can refer to step 1320, which will not be repeated here.

[0227] The steps 1520, 1530, 1540, 1550, 1560 and 1570 are optional steps, and the first communication device can execute part of the optional steps, execute all the optional steps, or execute no optional step. In addition, the execution sequence of the steps 1510, 1520, 1530, 1540, 1550, 1560 and 1570 can be adjusted according to actual conditions, and the numbers used for identifying the steps in the present application do not mean limitation on the execution sequence of the steps.

[0228] For example, the first communication device sends the fifth signaling for indicating the transmission power of the second communication device after the first condition is met. For example, the fifth signaling is used for indicating to increase the transmission power of the second communication device. In the case that the number of times that the first communication device sends the fifth signaling is greater than or equal to a fourth threshold value, if the first condition is still met, the first communication device sends the first signaling or the first carrier.

[0229] For example, the first communication device sends the sixth signaling for requesting power adjustment after the first condition is met. For example, the sixth signaling is used for requesting the network device to increase the transmission power of the second communication device. The network device sends the seventh signaling to the second communication device, and the seventh signaling is used for indicating to increase the transmission power of the second communication device. For another example, the sixth signaling is used for requesting the network device to increase the transmission power of the first communication device. The network device sends the seventh signaling to the first communication device, and the seventh signaling is used for indicating to increase the transmission power of the first communication device. In the case that the number of times that the first communication device sends the sixth signaling is greater than or equal to a fifth threshold value, if the first condition is still met, the first communication device sends the first carrier.

[0230] For example, the first communication device increases the transmission power of the first communication device after the first condition is met. In the case that the number of times that the first communication device increases the transmission power is greater than or equal to a sixth threshold value, if the first condition is still met, the first communication device sends the first signaling.

[0231] In summary, the method provided by the embodiments of the present application supports the first communication device to provide the first carrier for the A-IoT device, and the A-IoT device performs D2R transmission by using the first carrier provided by the first communication device and the second carrier provided by the second communication device. In addition, the time domain position and / or the frequency domain position of the second carrier are indicated to the second communication device, so as to avoid the conflict between the second carrier and the first carrier in the time-frequency position, the position of the two carriers is coordinated by the first communication device, and the reliability and coverage of the D2R transmission are guaranteed. If the first communication device and the second communication device are in different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is beneficial to the D2R transmission against channel fading.

[0232] On the basis of the embodiment shown in FIG. 14, step 1420 can be further implemented as step 1610, as shown in FIG. 16. Optionally, the first communication device further performs one or more of the following optional steps: step 1620, step 1630, step 1640, step 1650, step 1660, step 1670, step 1680.

[0233] FIG. 16 shows a flow diagram of a method of carrier transmission, according to an example embodiment of the present application. The method is performed by a first communication device. The method comprises at least part of the following steps:

[0234] Step 1610: transmitting the first carrier to the A-IoT device.

[0235] For relevant content, refer to step 1510, which will not be repeated here.

[0236] Step 1620: transmitting second signaling to the network device.

[0237] The second signaling is used to request scheduling of the carrier transmission. For example, the second signaling is used for one or more of the following:

[0238] • for requesting the network device to schedule or trigger transmission of the first carrier;

[0239] • for requesting the network device to schedule or trigger transmission of the second carrier;

[0240] • for requesting the network device to indicate the time-domain location and / or the frequency-domain location of the first carrier;

[0241] • for requesting the network device to indicate the time-domain location and / or the frequency-domain location of the second carrier.

[0242] In some embodiments, the first communication device transmits the second signaling to the network device under the condition that the first condition and / or the second condition are met.

[0243] Step 1630: receiving third signaling.

[0244] The third signaling is transmitted by the network device based on the second signaling.

[0245] In some embodiments, the third signaling is used to indicate the time-domain location and / or the frequency-domain location of the first carrier.

[0246] In some embodiments, the third signaling is used to indicate the time-domain location and / or the frequency-domain location of the second carrier.

[0247] In some embodiments, the third signaling is used to indicate the time-domain location and / or the frequency-domain location of the first carrier, and the time-domain location and / or the frequency-domain location of the second carrier.

[0248] In some embodiments, the third signaling is further used to trigger or schedule the first communication device to transmit the first carrier.

[0249] In some embodiments, the third signaling is further used to trigger or schedule the second communication device to transmit the second carrier.

[0250] Step 1640: transmitting fifth signaling to the second communication device.

[0251] The fifth signaling is used to indicate the transmission power of the second communication device. Optionally, the first communication device transmits the fifth signaling to the second communication device in the case that the first condition is met.

[0252] Step 1650: transmitting sixth signaling to the network device.

[0253] The sixth signaling is used to request the network device to indicate the transmission power of the first communication device and / or the second communication device. Optionally, the first communication device transmits the sixth signaling to the network device in the case that the first condition is met.

[0254] Step 1660: receiving seventh signaling.

[0255] The seventh signaling is transmitted by the network device based on the sixth signaling. The seventh signaling is used to adjust the transmission power of the communication device.

[0256] In some embodiments, the seventh signaling is used to indicate to increase the transmission power of the first communication device, and / or the transmission power of the second communication device.

[0257] Step 1670: adjusting the transmission power.

[0258] In some embodiments, the first communication device adjusts the transmission power of the first carrier, such as increasing the transmission power of the first carrier, in the case that the first condition is met.

[0259] In some embodiments, the first communication device adjusts the transmission power of the first carrier, such as increasing the transmission power of the first carrier, according to the indication of the seventh signaling.

[0260] Step 1680: receiving D2R transmission of the A-IoT device.

[0261] The first communication device receives D2R transmission of the A-IoT device based on the first carrier and the second carrier. That is, the first communication device receives signal and / or data transmitted by the A-IoT device based on the first carrier and the second carrier in a communication manner of backscattering.

[0262] Other contents of the embodiments of the present application can refer to step 1320, which will not be repeated here.

[0263] The steps 1620, 1630, 1640, 1650, 1660, 1670 and 1680 are optional steps, and the first communication device can execute part of the optional steps, execute all the optional steps, or execute no optional step. In addition, the execution sequence of the steps 1610, 1620, 1630, 1640, 1650, 1660, 1670 and 1680 can be adjusted according to actual conditions, and the numbers used to identify the steps in the present application do not mean limitation on the execution sequence of the steps.

[0264] For example, the first communication device sends the fifth signaling to indicate the transmission power of the second communication device after the first condition is met. For example, the fifth signaling is used to indicate to increase the transmission power of the second communication device. In the case where the number of times that the first communication device sends the fifth signaling is greater than or equal to the fourth threshold value, if the first condition is still met, the first communication device sends the first carrier.

[0265] For example, the first communication device sends the sixth signaling to request power adjustment after the first condition is met. For example, the sixth signaling is used to request the network device to increase the transmission power of the second communication device. The network device sends the seventh signaling to the second communication device, and the seventh signaling is used to indicate to increase the transmission power of the second communication device. For another example, the sixth signaling is used to request the network device to increase the transmission power of the first communication device. The network device sends the seventh signaling to the first communication device, and the seventh signaling is used to indicate to increase the transmission power of the first communication device. In the case where the number of times that the first communication device sends the sixth signaling is greater than or equal to the fifth threshold value, if the first condition is still met, the first communication device sends the second signaling or the first carrier.

[0266] For example, the first communication device increases the transmission power of the first communication device after the first condition is met. In the case where the number of times that the first communication device increases the transmission power is greater than or equal to the sixth threshold value, if the first condition is still met, the first communication device sends the second signaling.

[0267] In summary, the method provided by the embodiments of the present application supports the first communication device to provide the first carrier for the A-IoT device, and the A-IoT device performs D2R transmission by using the first carrier provided by the first communication device and the second carrier provided by the second communication device. In addition, the time domain position and / or the frequency domain position of the second carrier are indicated to the second communication device, so as to avoid the conflict between the second carrier and the first carrier in the time-frequency position, the position of the two carriers is coordinated by the first communication device, and the reliability and coverage of the D2R transmission are guaranteed. If the first communication device and the second communication device are in different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is beneficial to the D2R transmission to resist channel fading.

[0268] FIG. 17 shows a flowchart of a method of carrier transmission according to an example embodiment of the present application, which is performed by a second communication device. The method comprises at least part of the following steps:

[0269] Step 1720: transmitting a second carrier to the A-IoT device, the second carrier being used by the A-IoT device for D2R transmission together with the first carrier, the first carrier being transmitted by a first communication device.

[0270] In some embodiments, the second communication device is a CWN, or a network device (e.g., a base station, which can refer to the network device 110 shown in FIG. 1), or an intermediate node, or other device supporting carrier provision for A-IoT devices. The first communication device is a CWN, or a network device, or an intermediate node, or other device supporting carrier provision for A-IoT devices. And, the first communication device and the second communication device are different devices. Therefore, the first carrier and the second carrier are transmitted by two different nodes to the A-IoT device respectively.

[0271] Here, the intermediate node can be a UE, but it does not exclude the case that the intermediate node is a Relay, an IAB node, a Repeater, or other devices.

[0272] The first carrier and the second carrier are used by the A-IoT device for D2R transmission in a backscattering communication mode, that is, the A-IoT device transmits signals and / or data based on the first carrier and the second carrier in a backscattering communication mode.

[0273] In summary, the method provided by the embodiments of the present application supports the second communication device to provide a second carrier for the A-IoT device, and the A-IoT device performs D2R transmission based on the first carrier provided by the first communication device and the second carrier provided by the second communication device. Since D2R transmission is implemented by using at least two carriers for backscattering, even if the channel quality of one of the carriers is poor, the A-IoT device can still perform D2R transmission through the other carrier, effectively ensuring the reliability of D2R transmission. And, since the first carrier and the second carrier come from different communication devices, the second communication device only needs to transmit a single-tone carrier, and the second communication device does not need to split its own transmission power, which can ensure the coverage of the carrier and the uplink coverage of D2R transmission. In addition, if the first communication device and the second communication device are at different positions, such as different directions relative to the A-IoT device, it can further provide spatial gain, which is conducive to D2R transmission against channel fading.

[0274] On the basis of the embodiment shown in FIG. 17, step 1720 can be further implemented as step 1810, as shown in FIG. 18. Optionally, the second communication device further performs one or more of the following optional steps: step 1820, step 1830, step 1840, step 1850.

[0275] FIG. 18 shows a flow diagram of a carrier transmission method provided by an example embodiment of the present application, which is performed by a second communication device. The method includes at least part of the following steps:

[0276] Step 1810: sending the second carrier to the A-IoT device.

[0277] The first carrier and the second carrier are used by the A-IoT device for D2R transmission, and the first carrier is sent by a first communication device.

[0278] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier; and / or, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier.

[0279] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of the following: the time domain starting position of the first carrier is aligned with the time domain starting position of the second carrier; the interval between the time domain starting position of the first carrier and the time domain starting position of the second carrier is less than or equal to a first time domain interval; the time domain ending position of the first carrier is aligned with the time domain ending position of the second carrier; the interval between the time domain ending position of the first carrier and the time domain ending position of the second carrier is less than or equal to a second time domain interval.

[0280] The first time domain interval is preconfigured, or agreed by a communication protocol, or configured by a network device, or configured by an intermediate node, or configured by a CWN. The second time domain interval is preconfigured, or agreed by a communication protocol, or configured by a network device, or configured by an intermediate node, or configured by a CWN.

[0281] In some embodiments, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of the following: the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the coherence bandwidth of the channel; the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the bandwidth of the D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

[0282] In some embodiments, D2R transmission includes one or more of the following: a random identifier (or temporary identifier); a device identifier; a command-based feedback message; a query-based feedback message; a queryRep-based feedback message; or a paging-based feedback message. The random identifier may be, for example, RN16 or RN32.

[0283] In some embodiments, the device identifier may include one or more of the following: EPC, Network ID, Access ID, Physical ID, and Hardware ID.

[0284] In some embodiments, the first carrier is transmitted by the first communication device to the A-IoT device when a first condition and / or a second condition are met.

[0285] Step 1820: Receive the first signaling.

[0286] The first signaling is used to indicate the time-domain and / or frequency-domain location of the second carrier.

[0287] In some embodiments, the first signaling is also used to trigger or schedule the second communication device to send a second carrier.

[0288] In some embodiments, the first signaling is sent by the first communication device to the second communication device when a first condition and / or a second condition are met.

[0289] Step 1830: Receive the fifth signaling.

[0290] The fifth signaling is used to indicate the transmission power of the second communication device. Optionally, the fifth signaling is sent by the first communication device to the second communication device when the first condition is met.

[0291] Step 1840: Receive the seventh signaling.

[0292] The seventh signaling is sent by the network device based on the sixth signaling. The sixth signaling is used to request the network device to indicate the transmission power of the first communication device and / or the second communication device. The seventh signaling is used to adjust the transmission power of the communication device.

[0293] In some embodiments, the seventh signaling is used to instruct an increase in the transmission power of the first communication device.

[0294] In some embodiments, the seventh signaling is used to instruct an increase in the transmission power of the second communication device.

[0295] In some embodiments, the seventh signaling is used to instruct an increase in the transmission power of the first communication device and the second communication device.

[0296] Step 1850: Adjust the transmission power.

[0297] In some embodiments, the second communication device adjusts the transmission power of the second carrier, such as increasing the transmission power of the second carrier, if the first condition is met.

[0298] In some embodiments, the second communication device adjusts the transmission power of the second carrier, such as increasing the transmission power of the second carrier, according to the indication of the seventh signaling.

[0299] In some embodiments, the second communication device adjusts the transmission power of the second carrier, such as increasing the transmission power of the second carrier, according to the indication of the fifth signaling.

[0300] Other contents of the embodiments of the present application can refer to step 1320, which will not be described here.

[0301] Steps 1820, 1830, 1840, and 1850 are optional steps, and the second communication device can execute part of the optional steps, execute all the optional steps, or not execute the optional steps. Moreover, the execution order of the above-mentioned steps 1810, 1820, 1830, 1840, and 1850 can be adjusted according to actual conditions, and the numbers used to identify the steps in the present application do not mean to limit the execution order of the steps.

[0302] For example, the first communication device sends the fifth signaling after the first condition is met, and the fifth signaling is used to indicate the transmission power of the second communication device. For example, the fifth signaling is used to indicate to increase the transmission power of the second communication device. In the case where the number of times that the first communication device sends the fifth signaling is greater than or equal to the fourth threshold value, if the first condition is still met, the first communication device sends the first signaling or sends the first carrier. It can be understood that the second communication device can receive the first signaling and / or the fifth signaling in the process, the first signaling is used to trigger or schedule the transmission of the second carrier, and the fifth signaling is used to adjust the transmission power of the second communication device.

[0303] For example, the first communication device sends the sixth signaling after the first condition is met, and the sixth signaling is used to request power adjustment. For example, the sixth signaling is used to request the network device to increase the transmission power of the second communication device. The network device sends the seventh signaling to the second communication device, and the seventh signaling is used to indicate to increase the transmission power of the second communication device. For another example, the sixth signaling is used to request the network device to increase the transmission power of the first communication device. The network device sends the seventh signaling to the first communication device, and the seventh signaling is used to indicate to increase the transmission power of the first communication device. In the case where the number of times that the first communication device sends the sixth signaling is greater than or equal to the fifth threshold value, if the first condition is still met, the first communication device sends the first carrier. It can be understood that the second communication device can receive the seventh signaling in the process, and the seventh signaling is used to adjust the transmission power of the second communication device.

[0304] For example, the first communication device increases the transmission power of the first communication device after the first condition is met. In a case where the number of times that the first communication device increases the transmission power is greater than or equal to a sixth threshold value, if the first condition is still met, the first communication device transmits the first signaling. It can be understood that the second communication device can receive the first signaling in the process, and the first signaling is used to trigger or schedule the transmission of the second carrier.

[0305] In summary, the method provided by the embodiments of the present application supports the second communication device providing the second carrier for the A-IoT device, and the A-IoT device performing D2R transmission by using the first carrier provided by the first communication device and the second carrier provided by the second communication device. The time domain position and / or the frequency domain position of the second carrier are also indicated to the second communication device, so as to avoid the conflict between the second carrier and the first carrier in the time-frequency position, and the position of the two carriers is coordinated by the first communication device, thereby guaranteeing the reliability and coverage of the D2R transmission. If the first communication device and the second communication device are in different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is beneficial to the D2R transmission against channel fading.

[0306] On the basis of the embodiment shown in FIG. 17, the step 1720 can be further implemented as a step 1910, as shown in FIG. 19. Optionally, the second communication device further performs one or more of the following optional steps: a step 1920, a step 1930, a step 1940, and a step 1950.

[0307] FIG. 19 shows a flowchart of a carrier transmission method provided by an example embodiment of the present application, which is performed by a second communication device. The method includes at least part of the following steps:

[0308] The step 1910: transmitting the second carrier to the A-IoT device.

[0309] For details, refer to the step 1810, which will not be repeated here.

[0310] The step 1920: receiving third signaling or fourth signaling.

[0311] In some embodiments, the third signaling is transmitted by a network device based on the second signaling, and the second signaling is used to request scheduling of the carrier transmission.

[0312] In some embodiments, the third signaling is used to indicate the time domain position and / or the frequency domain position of the second carrier.

[0313] In some embodiments, the third signaling is used to indicate the time domain position and / or the frequency domain position of the second carrier, and the time domain position and / or the frequency domain position of the first carrier.

[0314] In some embodiments, the third signaling is further used to trigger or schedule the second communication device to transmit the second carrier.

[0315] In some embodiments, the third signaling is further used to trigger or schedule the first communication device to transmit the first carrier.

[0316] In some embodiments, the fourth signaling is sent by the network device based on the second signaling, the second signaling being used to request scheduling the carrier transmission.

[0317] In some embodiments, the fourth signaling is used to indicate the time domain location and / or the frequency domain location of the second carrier.

[0318] In some embodiments, the fourth signaling is further used to trigger or schedule the second communication device to transmit the second carrier.

[0319] Step 1930: receiving fifth signaling.

[0320] The fifth signaling is used to indicate the transmission power of the second communication device. Optionally, the fifth signaling is sent by the first communication device to the second communication device in case that the first condition is met.

[0321] Step 1940: receiving seventh signaling.

[0322] The seventh signaling is sent by the network device based on the sixth signaling. The sixth signaling is used to request the network device to indicate the transmission power of the first communication device and / or the second communication device. The seventh signaling is used to adjust the transmission power of the communication device.

[0323] In some embodiments, the seventh signaling is used to indicate to increase the transmission power of the first communication device.

[0324] In some embodiments, the seventh signaling is used to indicate to increase the transmission power of the second communication device.

[0325] In some embodiments, the seventh signaling is used to indicate to increase the transmission power of the first communication device and the second communication device.

[0326] Step 1950: adjusting the transmission power.

[0327] In some embodiments, the second communication device adjusts the transmission power of the second carrier, such as increasing the transmission power of the second carrier, in case that the first condition is met.

[0328] In some embodiments, the second communication device adjusts the transmission power of the second carrier, such as increasing the transmission power of the second carrier, according to the indication of the fifth signaling.

[0329] In some embodiments, the second communication device adjusts the transmission power of the second carrier, such as increasing the transmission power of the second carrier, according to the indication of the seventh signaling.

[0330] Other contents of the embodiments of the present application can refer to step 1320, which will not be described here.

[0331] Steps 1920, 1930, 1940 and 1950 are optional steps, and the second communication device can execute part of the optional steps, execute all the optional steps, or not execute the optional steps. In addition, the execution order of the above steps 1910, 1920, 1930, 1940 and 1950 can be adjusted according to actual conditions, and the numbers used to identify the steps in the present application do not mean to limit the execution order of the steps.

[0332] For example, the first communication device sends the fifth signaling after the first condition is met, and the fifth signaling is used to indicate the transmission power of the second communication device. For example, it is used to indicate to increase the transmission power of the second communication device. In the case where the number of times that the first communication device sends the fifth signaling is greater than or equal to the fourth threshold value, if the first condition is still met, the first communication device sends the first carrier. It can be understood that the second communication device can receive the fifth signaling in the process, and the fifth signaling is used to adjust the transmission power of the second communication device.

[0333] For example, the first communication device sends the sixth signaling after the first condition is met, and the sixth signaling is used to request power adjustment. For example, it is used to request the network device to increase the transmission power of the second communication device. The network device sends the seventh signaling to the second communication device, and the seventh signaling is used to indicate to increase the transmission power of the second communication device. For another example, it is used to request the network device to increase the transmission power of the first communication device. The network device sends the seventh signaling to the first communication device, and the seventh signaling is used to indicate to increase the transmission power of the first communication device. In the case where the number of times that the first communication device sends the sixth signaling is greater than or equal to the fifth threshold value, if the first condition is still met, the first communication device sends the second signaling or the first carrier. It can be understood that the second communication device can receive the seventh signaling in the process, and the seventh signaling is used to adjust the transmission power of the second communication device. The second communication device can also receive the third signaling or the fourth signaling corresponding to the second signaling in the process, and the third signaling or the fourth signaling is used to schedule the transmission of the second carrier.

[0334] For example, the first communication device increases the transmission power of the first communication device after the first condition is met. In the case where the number of times that the first communication device increases the transmission power is greater than or equal to the sixth threshold value, if the first condition is still met, the first communication device sends the second signaling. It can be understood that the second communication device can receive the third signaling or the fourth signaling corresponding to the second signaling in the process, and the third signaling or the fourth signaling is used to schedule the transmission of the second carrier.

[0335] In summary, the method provided by the embodiments of the present application supports the second communication device providing a second carrier for the A-IoT device, and the A-IoT device performing D2R transmission by using the first carrier provided by the first communication device and the second carrier provided by the second communication device. The time domain position and / or the frequency domain position of the second carrier are indicated to the second communication device, so as to avoid the conflict between the second carrier and the first carrier in the time-frequency position, and the position of the two carriers is coordinated by the first communication device, thereby guaranteeing the reliability and coverage of the D2R transmission. If the first communication device and the second communication device are in different positions, such as different directions relative to the A-IoT device, the spatial gain can be further provided, which is beneficial to the D2R transmission against channel fading.

[0336] Further, based on the deployment scenario 1 shown in FIG. 5, FIG. 20 shows a schematic diagram of a carrier transmission method provided by an example embodiment of the present application. The Reader in FIG. 20 can be a base station. The method provided by the embodiments of the present application supports providing an Additional CW for the A-IoT device when the D2R transmission of the A-IoT device fails, so that the A-IoT device can perform backscattering according to the original CW and the Additional CW to complete the D2R transmission, and the CW and the Additional CW correspond to different frequency points and are from different communication devices, thereby obtaining the selective gain in the frequency domain and the spatial domain, and increasing the reliability of the D2R transmission.

[0337] Referring to (a) of FIG. 20, a first communication device is taken as the Reader 2, and a second communication device is taken as the Reader 1 for example. The second carrier is referred to as a carrier (CW), and the first carrier is referred to as an additional carrier (Additional CW). The Reader 1 provides a Single-tone second carrier, and the A-IoT device performs backscattering based on the second carrier to send a D2R transmission, such as an RN16 reported by the A-IoT device, to the Reader 2. If the Reader 2 does not successfully receive the RN16, or if the Reader 2 successfully receives the RN16 but the received power measured based on the RN16 is lower than a third threshold (indicating that the reception of a subsequent longer EPC can be affected), that is, the first condition is met, the Reader 2 can send the first carrier, and the A-IoT device performs backscattering based on the first carrier and the Two-tone carrier provided by the second carrier to implement subsequent D2R transmission, such as an RN16 and / or an EPC reported by the A-IoT device.

[0338] Optionally, in the case that the first condition is met, Reader 2 can send a first signaling to Reader 1, the first signaling being used to indicate the time-frequency resource position of the second carrier, Reader 2 can start transmitting the first carrier at the time-domain start position of the second carrier transmission indicated to Reader 1 and end transmitting the first carrier at the time-domain end position of the second carrier transmission indicated to Reader 1, so as to ensure that the time-domain positions of the second carrier and the first carrier are aligned, and Reader 2 can indicate the frequency-domain position of the second carrier transmission to Reader 1, and the first carrier is transmitted at the frequency-domain position of the second carrier and the frequency-domain interval between the frequency-domain position of the second carrier and the frequency-domain position of the first carrier is greater than or equal to the frequency-domain position of the D2R transmission bandwidth.

[0339] Optionally, in the case that the first condition is met, if Reader 2 knows the time-frequency resource position of the next transmission of the second carrier, for example, the second carrier periodically transmits at a certain frequency point, Reader 2 can also directly transmit the first carrier, so as to ensure that the time-domain positions of the second carrier and the first carrier are aligned, and the frequency-domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0340] Optionally, in the case that the first condition is met, Reader 2 can first send a fifth signaling to Reader 1, the fifth signaling being used to indicate that Reader 1 increases the transmission power of the second carrier, if Reader 1 performs power climbing, Reader 2 still cannot successfully receive the D2R transmission, or although Reader 2 successfully receives the D2R transmission, the received power measured based on the D2R transmission is lower than a third threshold, that is, in the case that Reader 1 increases the transmission power, Reader 2 still meets the first condition, then Reader 2 transmits the first carrier again. Optionally, Reader 2 can also send the first signaling to Reader 1 or directly transmit the first carrier, and the related description is the same as above.

[0341] Referring to (b) of FIG. 20, a schematic diagram is described by taking the first communication device as a Reader and the second communication device as a CWN as an example. The first carrier is referred to as a carrier (CW) and the second carrier is referred to as an additional carrier (Additional CW). The Reader can perform R2D transmission to the A-IoT device, for example, sending a Query command to trigger the A-IoT device to access, after sending the Query command, the Reader provides a Single-tone first carrier, and the A-IoT device performs backscattering based on the first carrier to send D2R transmission to the Reader, for example, the D2R transmission is RN16 reported by the A-IoT device. If the Reader does not successfully receive the corresponding RN16 after sending the Query command, or, although the Reader successfully receives the RN16, the received power measured based on the RN16 is lower than a third threshold (indicating that it may affect the reception of a subsequent longer EPC), that is, the first condition is met, the Reader can send the first carrier and instruct the CWN to send the second carrier, and the A-IoT device performs backscattering based on the Two-tone carrier provided by the first carrier and the second carrier to realize subsequent D2R transmission, for example, the subsequent D2R transmission is RN16 and / or EPC reported by the A-IoT device.

[0342] Optionally, in the case where the first condition is met, the Reader can send first signaling to the CWN, the first signaling is used to indicate the time-frequency resource position of the second carrier, the Reader can start transmitting the first carrier at the time domain starting position of the second carrier transmission indicated by the CWN, and end transmitting the first carrier at the time domain ending position of the second carrier transmission indicated by the CWN, so as to ensure that the time domain positions of the first carrier and the second carrier are aligned, and the Reader can indicate the frequency domain position of the second carrier transmission to the CWN, and transmit the first carrier at a frequency domain position greater than or equal to the frequency domain position of the D2R transmission bandwidth.

[0343] Optionally, in the case where the first condition is met, the Reader increases the transmission power of the first carrier. If the Reader still does not receive the corresponding D2R transmission of the R2D transmission after power climbing, or, although the Reader successfully receives the D2R transmission, the received power measured based on the D2R transmission is lower than the third threshold, that is, the Reader still meets the first condition after increasing the transmission power, then the Reader refers to the above description to send the first signaling to instruct the CWN to send the second carrier.

[0344] Referring to (c) of FIG. 20, a schematic diagram is shown with the first communication device as Reader and the second communication device as CWN. The second carrier is referred to as carrier (CW) and the first carrier is referred to as additional carrier (Additional CW). The Reader can perform R2D transmission to the A-IoT device, for example, sending Query command to trigger the A-IoT device to access. The CWN can provide the second carrier of Single-tone, and the A-IoT device performs backscattering based on the second carrier to send D2R transmission to the Reader, for example, the D2R transmission is RN16 reported by the A-IoT device. If the Reader fails to successfully receive the RN16 corresponding to the Query command, or, although the Reader successfully receives the RN16, the received power measured based on the RN16 is lower than a third threshold (indicating that the reception of the subsequent longer EPC can be affected), that is, the first condition is met, the Reader can send the first carrier, and the subsequent A-IoT device performs backscattering based on the Two-tone carrier provided by the first carrier and the second carrier to implement the subsequent D2R transmission, for example, the subsequent D2R transmission is RN16 and / or EPC reported by the A-IoT device.

[0345] Optionally, in the case where the first condition is met, the Reader can send first signaling to the CWN, the first signaling is used to indicate the time-frequency resource position of the second carrier, the Reader can start to transmit the first carrier from the time domain start position of the second carrier transmission indicated by the CWN, and end the transmission of the first carrier at the time domain end position of the second carrier transmission indicated by the CWN, so as to ensure that the time domain positions of the first carrier and the second carrier are aligned, and the Reader can indicate the frequency domain position of the second carrier transmission to the CWN, and the frequency domain interval between the frequency domain position of the second carrier and the first carrier is greater than or equal to the frequency domain position of the D2R transmission bandwidth.

[0346] Optionally, in the case where the first condition is met, if the Reader knows the time-frequency resource position of the next transmission of the second carrier, for example, the second carrier is periodically transmitted at a certain frequency point, the Reader can also directly send the first carrier to ensure that the time domain positions of the first carrier and the second carrier are aligned, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0347] Optionally, in the case that the first condition is met, the Reader can first send a fifth signaling to the CWN, the fifth signaling being used to instruct the CWN to increase the transmission power of the second carrier. If the CWN performs power climbing, the Reader still does not receive the D2R transmission corresponding to the R2D transmission, or the Reader successfully receives the D2R transmission but the received power measured based on the D2R transmission is lower than the third threshold, i.e., the Reader still meets the first condition after the CWN increases the transmission power, the Reader then sends the first carrier. Optionally, the Reader can also send the first signaling to the CWN or directly send the first carrier, and the related description is the same as above.

[0348] Based on the deployment scenario 2 shown in FIG. 6, FIG. 21 shows a schematic diagram of a carrier transmission method provided by an example embodiment of the present application. The Reader in FIG. 20 can be an intermediate node. The method provided by the embodiment of the present application supports providing an Additional CW for the A-IoT device under the scheduling of the base station when the A-IoT device D2R transmission fails, so that the A-IoT device can perform backscattering according to the original CW and the Additional CW to complete the D2R transmission, and the CW and the Additional CW correspond to different frequency points and are from different communication devices, thereby obtaining the selective gain of the frequency domain and the spatial domain, and increasing the reliability of the D2R transmission.

[0349] Referring to (a) of FIG. 21, a first communication device is taken as an example of the Reader 2, and a second communication device is taken as an example of the Reader 1. The second carrier is referred to as a carrier (CW), and the first carrier is referred to as an Additional CW. The Reader 1 provides a Single-tone second carrier, and the A-IoT device performs backscattering based on the second carrier to send a D2R transmission, such as an RN16 reported by the A-IoT device, to the Reader 2. If the Reader 2 does not successfully receive the RN16, or the Reader 2 successfully receives the RN16 but the received power measured based on the RN16 is lower than a third threshold (indicating that the reception of a subsequent longer EPC can be affected), i.e., the first condition is met, the Reader 2 can send the first carrier, and the subsequent A-IoT device performs backscattering based on the first carrier and the Two-tone carrier provided by the second carrier to implement subsequent D2R transmission, such as an RN16 and / or an EPC reported by the A-IoT device.

[0350] Optionally, Reader 2 can send a second signaling to the base station to request the base station to schedule the second carrier in case the first condition is met. Illustratively, the base station sends a third signaling to indicate the time-frequency resource locations of the second carrier and the first carrier to Reader 1 after receiving the second signaling. As the transmission of the first carrier is also scheduled by the base station, the second carrier can be aligned with the time-domain location of the first carrier and the frequency-domain spacing between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth depending on the base station.

[0351] Optionally, Reader 2 can send a second signaling to the base station to request the base station to schedule the first carrier and the second carrier in case the first condition is met. Illustratively, the base station sends a third signaling to indicate the time-frequency resource locations of the second carrier and the first carrier to Reader 1 and Reader 2 after receiving the second signaling, so that the second carrier can be aligned with the time-domain location of the first carrier and the frequency-domain spacing between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth depending on the base station. Illustratively, the third signaling is transmitted in a groupcast or broadcast manner. Illustratively, the third signaling contains the identity or truncated identity of Reader 1 and Reader 2, or the third signaling is scrambled with the identity or truncated identity of Reader 1 and Reader 2.

[0352] Optionally, Reader 2 can send a second signaling to the base station to request the base station to schedule the first carrier and the second carrier in case the first condition is met. Illustratively, the base station sends a fourth signaling and a third signaling to indicate the time-frequency resource locations of the second carrier and the first carrier to Reader 1 and Reader 2 respectively after receiving the second signaling, so that the second carrier can be aligned with the time-domain location of the first carrier and the frequency-domain spacing between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth depending on the base station. Illustratively, the third signaling contains the identity or truncated identity of Reader 2, or the third signaling is scrambled with the identity or truncated identity of Reader 2. Illustratively, the fourth signaling contains the identity or truncated identity of Reader 1, or the fourth signaling is scrambled with the identity or truncated identity of Reader 1.

[0353] Optionally, in the case of meeting the first condition, Reader 2 can send a second signaling to the base station, the second signaling being used to request the base station to schedule the first carrier. Illustratively, after receiving the second signaling, the base station sends a third signaling to indicate the time-frequency resource position of the first carrier to Reader 2. Since the transmission of the second carrier is also scheduled by the base station, the second carrier can be aligned with the time domain position of the first carrier and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth depending on the base station.

[0354] Optionally, in the case of meeting the first condition, if Reader 2 knows the time-frequency resource position of the next transmission of the second carrier, for example, the second carrier periodically transmits at a certain frequency point, Reader 2 can also directly send the first carrier to ensure that the second carrier is aligned with the time domain position of the first carrier and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0355] Optionally, in the case of meeting the first condition, Reader 2 can first send a sixth signaling to the base station to request power adjustment, and the base station sends a seventh signaling to Reader 1 after receiving the sixth signaling, the seventh signaling being used to indicate Reader 1 to increase the transmission power of the second carrier. If Reader 1 performs power climbing, Reader 2 still cannot successfully receive the D2R transmission, or although Reader 2 successfully receives the D2R transmission, the received power measured based on the D2R transmission is lower than the third threshold, that is, Reader 2 still meets the first condition after Reader 1 increases the transmission power, then Reader 2 sends the first carrier again. Optionally, Reader 2 can also send the second signaling to the base station or directly send the first carrier, and the related description is the same as above.

[0356] Referring to (b) of FIG. 21, a schematic illustration is made by taking the first communication device as the Reader and the second communication device as the CWN as an example. The first carrier is referred to as the carrier (CW) and the second carrier is referred to as the additional carrier (Additional CW). The Reader can perform R2D transmission to the A-IoT device, for example, sending a Query command to trigger the A-IoT device to access, after sending the Query command, the Reader provides a Single-tone first carrier, and the A-IoT device performs backscattering based on the first carrier to send D2R transmission to the Reader, for example, the D2R transmission is the RN16 reported by the A-IoT device. If the Reader does not successfully receive the corresponding RN16 after sending the Query command, or, although the Reader successfully receives the RN16, the received power measured based on the RN16 is lower than a third threshold (indicating that it may affect the reception of the subsequent longer EPC), that is, the first condition is met, the Reader can send the first carrier and request the base station to schedule the CWN to send the second carrier. Subsequent A-IoT devices perform backscattering based on the Two-tone carrier provided by the first carrier and the second carrier to realize subsequent D2R transmission, for example, the subsequent D2R transmission is the RN16 and / or the EPC reported by the A-IoT device.

[0357] Optionally, in the case where the first condition is met, the Reader can send second signaling to the base station, and the second signaling is used to request the base station to schedule the first carrier. Illustratively, after receiving the second signaling, the base station sends third signaling to indicate the time-frequency resource position of the first carrier to the Reader. Since the transmission of the second carrier is also scheduled by the base station, the second carrier can be aligned with the time domain position of the first carrier depending on the base station, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0358] Optionally, in the case where the first condition is met, the Reader can send second signaling to the base station, and the second signaling is used to request the base station to schedule the first carrier and the second carrier. Illustratively, after receiving the second signaling, the base station sends third signaling to indicate the time-frequency resource position of the first carrier and the second carrier to the Reader and the CWN, so that the second carrier can be aligned with the time domain position of the first carrier depending on the base station, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth. Illustratively, the third signaling is transmitted in a multicast or broadcast manner. Illustratively, the third signaling contains the identity or truncated identity of the Reader and the CWN, or the third signaling is scrambled with the identity or truncated identity of the Reader and the CWN.

[0359] Optionally, in the case that the first condition is met, the Reader can send a second signaling to the base station, the second signaling is used to request the base station to schedule the first carrier and the second carrier. Illustratively, after receiving the second signaling, the base station sends a third signaling and a fourth signaling to the Reader and the CWN respectively to indicate the time-frequency resource position of the first carrier and the second carrier, thus the base station can make the time domain position of the second carrier align with the first carrier, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth. Illustratively, the third signaling contains the identity or the truncated identity of the Reader, or the third signaling is scrambled with the identity or the truncated identity of the Reader. Illustratively, the fourth signaling contains the identity or the truncated identity of the CWN, or the fourth signaling is scrambled with the identity or the truncated identity of the CWN.

[0360] Optionally, in the case that the first condition is met, the Reader can send a second signaling to the base station, the second signaling is used to request the base station to schedule the second carrier. Illustratively, after receiving the second signaling, the base station sends a third signaling to the CWN to indicate the time-frequency resource position of the second carrier. Since the transmission of the first carrier is also scheduled by the base station, thus the base station can make the time domain position of the second carrier align with the first carrier, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0361] Optionally, in the case that the first condition is met, the Reader increases the transmission power of the first carrier, if the Reader still does not receive the D2R transmission corresponding to the R2D transmission after the power climbing, or the Reader successfully receives the D2R transmission but the received power measured based on the D2R transmission is lower than the third threshold, that is, the Reader still meets the first condition after increasing the transmission power, then the Reader sends the second signaling to request the base station to schedule the carriers according to the above description.

[0362] Optionally, in the case that the first condition is met, the Reader can first send a sixth signaling to the base station to request power adjustment, and the base station sends a seventh signaling to the Reader after receiving the sixth signaling, the seventh signaling is used to instruct the Reader to increase the transmission power of the first carrier. If the Reader still does not receive the D2R transmission corresponding to the R2D transmission after the power climbing, or the Reader successfully receives the D2R transmission but the received power measured based on the D2R transmission is lower than the third threshold, that is, the Reader still meets the first condition after increasing the transmission power, then the Reader sends the second signaling to request the base station to schedule the carriers according to the above description.

[0363] Referring to (c) of FIG. 21, a schematic diagram is shown with the first communication device as a Reader and the second communication device as a CWN. The second carrier is referred to as a carrier (CW) and the first carrier is referred to as an additional carrier (Additional CW). The Reader can perform R2D transmission to the A-IoT device, for example, sending a Query command to trigger the A-IoT device to access. The CWN can provide a second carrier of Single-tone, and the A-IoT device performs backscattering based on the second carrier to send D2R transmission to the Reader, for example, the D2R transmission is RN16 reported by the A-IoT device. If the Reader does not successfully receive the RN16 corresponding to the Query command, or, although the Reader successfully receives the RN16, the received power measured based on the RN16 is lower than a third threshold (indicating that it may affect the reception of a subsequent longer EPC), that is, the first condition is met, the Reader can send the first carrier, and the A-IoT device performs backscattering based on the first carrier and the Two-tone carrier provided by the second carrier to implement subsequent D2R transmission, for example, the subsequent D2R transmission is RN16 and / or EPC reported by the A-IoT device.

[0364] Optionally, in the case where the first condition is met, the Reader can send second signaling to the base station, and the second signaling is used to request the base station to schedule the second carrier. Illustratively, after receiving the second signaling, the base station sends third signaling to indicate the time-frequency resource position of the second carrier to the CWN. Since the transmission of the first carrier is also scheduled by the base station, the second carrier can be aligned with the time domain position of the first carrier depending on the base station, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0365] Optionally, in the case where the first condition is met, the Reader can send second signaling to the base station, and the second signaling is used to request to schedule the first carrier and the second carrier. Illustratively, after receiving the second signaling, the base station sends third signaling to indicate the time-frequency resource position of the second carrier and the first carrier to the CWN and the Reader, so that the second carrier can be aligned with the time domain position of the first carrier depending on the base station, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth. Illustratively, the third signaling is transmitted in a multicast or broadcast manner. Illustratively, the third signaling contains the identification or truncated identification of the CWN and the Reader, or the third signaling is scrambled with the identification or truncated identification of the CWN and the Reader.

[0366] Optionally, in the case that the first condition is met, the Reader can send a second signaling to the base station, the second signaling is used to request the base station to schedule the first carrier and the second carrier. Illustratively, after receiving the second signaling, the base station sends a third signaling and a fourth signaling to the Reader and the CWN respectively to indicate the time-frequency resource position of the first carrier and the second carrier, thus the base station can make the time domain position of the second carrier align with the first carrier, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth. Illustratively, the third signaling contains the identity or the truncated identity of the Reader, or the third signaling is scrambled with the identity or the truncated identity of the Reader. Illustratively, the fourth signaling contains the identity or the truncated identity of the CWN, or the fourth signaling is scrambled with the identity or the truncated identity of the CWN.

[0367] Optionally, in the case that the first condition is met, the Reader can send a second signaling to the base station, the second signaling is used to request the base station to schedule the first carrier. Illustratively, after receiving the second signaling, the base station sends a third signaling to the Reader to indicate the time-frequency resource position of the first carrier. Since the transmission of the second carrier is also scheduled by the base station, the base station can make the time domain position of the second carrier align with the first carrier, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0368] Optionally, in the case that the first condition is met, if the Reader knows the time-frequency resource position of the next transmission of the second carrier, for example, the second carrier periodically transmits at a certain frequency point, the Reader can also directly send the first carrier to ensure that the time domain position of the second carrier aligns with the first carrier, and the frequency domain interval between the second carrier and the first carrier is greater than or equal to the D2R transmission bandwidth.

[0369] Optionally, in the case that the first condition is met, the Reader can first send a sixth signaling to the base station to request power adjustment, and the base station sends a seventh signaling to the CWN after receiving the sixth signaling, the seventh signaling is used to instruct the CWN to increase the transmission power of the second carrier. If the CWN performs power climbing, the Reader still does not receive the D2R transmission corresponding to the R2D transmission, or although the Reader successfully receives the D2R transmission, the received power measured based on the D2R transmission is lower than the third threshold, that is, the Reader still meets the first condition after the CWN increases the transmission power, then the Reader sends the first carrier again, for example, the Reader can send the second signaling to request the base station to perform carrier scheduling, or the Reader directly sends the first carrier, as described above.

[0370] Figure 22 shows a structure block diagram of a carrier transmission apparatus according to an example embodiment of the present application, which can be implemented as the A-IoT device or a part of the A-IoT device described above. The apparatus includes a sending module 2210. Optionally, the apparatus further includes a receiving module 2230 and / or a processing module 2250. Optionally, the apparatus is a wireless communication device / wireless device supporting 3GPP protocol. Optionally, the apparatus is a wireless communication device / wireless device supporting 802.11 protocol.

[0371] The sending module 2210 is configured to perform D2R transmission based on a first carrier and a second carrier, wherein the first carrier is sent by a first communication device, and the second carrier is sent by a second communication device.

[0372] In some embodiments, a time domain position of the first carrier is associated with a time domain position of the second carrier; and / or, a frequency domain position of the first carrier is associated with a frequency domain position of the second carrier.

[0373] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of: a time domain start position of the first carrier is aligned with a time domain start position of the second carrier; an interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; a time domain end position of the first carrier is aligned with a time domain end position of the second carrier; an interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval.

[0374] In some embodiments, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of: an interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a coherence bandwidth of a channel; an interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a bandwidth of the D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

[0375] In some embodiments, the time domain position and / or the frequency domain position of the second carrier is indicated by first signaling sent by the first communication device to the second communication device.

[0376] In some embodiments, the first signaling is sent by the first communication device to the second communication device under the condition that a first condition and / or a second condition is met.

[0377] In some embodiments, the first carrier and / or the second carrier satisfy one or more of the following: a time domain location of the first carrier is indicated by third signaling; a frequency domain location of the first carrier is indicated by the third signaling; a time domain location of the second carrier is indicated by the third signaling; a frequency domain location of the second carrier is indicated by the third signaling; wherein the third signaling is sent by a network device.

[0378] In some embodiments, the third signaling is sent by the network device based on second signaling, the second signaling being used for requesting scheduling carrier transmission.

[0379] In some embodiments, a time domain location and / or a frequency domain location of the first carrier is indicated by third signaling, the third signaling being sent by a network device; a time domain location and / or a frequency domain location of the second carrier is indicated by fourth signaling, the fourth signaling being sent by the network device.

[0380] In some embodiments, the third signaling and the fourth signaling are sent by the network device based on second signaling, the second signaling being used for requesting scheduling carrier transmission.

[0381] In some embodiments, the second signaling is sent by the first communication device to the network device under the condition that a first condition and / or a second condition is satisfied.

[0382] In some embodiments, the first carrier is sent by the first communication device to the A-IoT device under the condition that a first condition and / or a second condition is satisfied.

[0383] In some embodiments, the first condition comprises one or more of the following: a number of times that the first communication device does not receive a corresponding D2R transmission after sending a reader-to-device R2D transmission is greater than or equal to a first threshold; a number of times that the first communication device fails to receive a D2R transmission is greater than or equal to a second threshold; a received signal measurement value obtained by the first communication device is less than or equal to a third threshold.

[0384] In some embodiments, the R2D transmission comprises one or more of the following: a Query message; a QueryRep message; a paging message; a feedback message based on a random identifier; a feedback message based on a device identifier; a command.

[0385] In some embodiments, the second condition comprises one or more of: a number of times that the first communication device sends fifth signaling for indicating a transmit power of the second communication device is greater than or equal to a fourth threshold; a number of times that the first communication device sends sixth signaling for requesting a network device to indicate a transmit power of the first communication device and / or the second communication device is greater than or equal to a fifth threshold; a number of times that the first communication device adjusts a transmit power is greater than or equal to a sixth threshold.

[0386] In some embodiments, the D2R transmission comprises one or more of: a random identification; a device identification; a command-based feedback message; a query message-based feedback message; a repeated query message-based feedback message; a paging message-based feedback message.

[0387] In some embodiments, the first communication device comprises any one of: a base station, an intermediate node, a carrier node; and the second communication device comprises any one of: a base station, an intermediate node, a carrier node.

[0388] In some embodiments, the sending module 2210 is configured to perform D2R transmission in a backscattering manner based on the first carrier and the second carrier.

[0389] In some embodiments, the receiving module 2230 is configured to receive one or more of: the first carrier, the second carrier, and R2D transmission.

[0390] In some embodiments, the processing module 2250 is configured to perform energy harvesting.

[0391] In some embodiments, the energy used by the sending module 2210 and / or the receiving module 2230 comprises energy harvested by the processing module 2250.

[0392] In summary, the apparatus provided by the embodiments of the present application supports D2R transmission through multiple carriers from different devices. Since D2R transmission is implemented by using at least two carriers to realize backscattering, the reliability of D2R transmission is effectively guaranteed. Moreover, since the first carrier and the second carrier come from different communication devices, a single communication device only needs to send a Single-tone carrier, and the communication device does not need to split its own transmit power, which can guarantee the coverage of the carrier and the uplink coverage of D2R transmission. In addition, if the first communication device and the second communication device are at different locations, spatial gain can be further provided, which is conducive to D2R transmission against channel fading.

[0393] FIG. 23 shows a structural block diagram of a carrier transmission apparatus according to an example embodiment of the present application, which can be implemented as the first communication device or a part of the first communication device described above. The apparatus includes a sending module 2310. Optionally, the apparatus further includes a receiving module 2330 and / or a processing module 2350. Optionally, the apparatus is a wireless communication device / wireless device supporting 3GPP protocol. Optionally, the apparatus is a wireless communication device / wireless device supporting 802.11 protocol.

[0394] The sending module 2310 is configured to send a first carrier to an A-IoT device, the first carrier being used for device-to-reader (D2R) transmission of the A-IoT device with a second carrier, the second carrier being sent by a second communication device.

[0395] In some embodiments, a time domain position of the first carrier is associated with a time domain position of the second carrier; and / or, a frequency domain position of the first carrier is associated with a frequency domain position of the second carrier.

[0396] In some embodiments, the time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of: a time domain start position of the first carrier is aligned with a time domain start position of the second carrier; an interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; a time domain end position of the first carrier is aligned with a time domain end position of the second carrier; an interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval.

[0397] In some embodiments, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of: an interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a coherence bandwidth of a channel; an interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a bandwidth of the D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

[0398] In some embodiments, the sending module 2310 is further configured to send, to the second communication device, first signaling indicating the time domain position and / or the frequency domain position of the second carrier.

[0399] In some embodiments, the sending module 2310 is further configured to send, to the second communication device, the first signaling in a case where a first condition and / or a second condition is satisfied.

[0400] In some embodiments, the first carrier and / or the second carrier satisfy one or more of the following: a time domain location of the first carrier is indicated by third signaling; a frequency domain location of the first carrier is indicated by the third signaling; a time domain location of the second carrier is indicated by the third signaling; a frequency domain location of the second carrier is indicated by the third signaling; wherein the third signaling is sent by a network device.

[0401] In some embodiments, the third signaling is sent by the network device based on second signaling, the second signaling being used to request scheduling carrier transmission.

[0402] In some embodiments, a time domain location and / or a frequency domain location of the first carrier is indicated by third signaling, the third signaling being sent by a network device; a time domain location and / or a frequency domain location of the second carrier is indicated by fourth signaling, the fourth signaling being sent by the network device.

[0403] In some embodiments, the third signaling and the fourth signaling are sent by the network device based on second signaling, the second signaling being used to request scheduling carrier transmission.

[0404] In some embodiments, the sending module 2310 is further configured to send, to the network device, the second signaling in a case where a first condition and / or a second condition is satisfied.

[0405] In some embodiments, the receiving module 2330 is configured to receive the third signaling.

[0406] In some embodiments, the sending module 2310 is further configured to send, to the A-IoT device, the first carrier in a case where a first condition and / or a second condition is satisfied.

[0407] In some embodiments, the processing module 2350 is configured to determine whether a first condition and / or a second condition is satisfied.

[0408] In some embodiments, the first condition comprises one or more of the following: a number of times that the apparatus does not receive a corresponding D2R transmission after sending a reader-to-device R2D transmission is greater than or equal to a first threshold; a number of times that the apparatus fails to receive a D2R transmission is greater than or equal to a second threshold; a received signal measurement value obtained by the apparatus is less than or equal to a third threshold.

[0409] In some embodiments, the R2D transmission comprises one or more of the following: a query message; a repeated query message; a paging message; a feedback message based on a random identifier; a feedback message based on a device identifier; a command.

[0410] In some embodiments, the second condition comprises one or more of: a number of times that the apparatus sends fifth signaling is greater than or equal to a fourth threshold, the fifth signaling being used to indicate transmit power of the second communication device; a number of times that the apparatus sends sixth signaling is greater than or equal to a fifth threshold, the sixth signaling being used to request a network device to indicate transmit power of the apparatus and / or the second communication device; a number of times that the apparatus adjusts transmit power is greater than or equal to a sixth threshold.

[0411] In some embodiments, the sending module 2310 is further configured to send, to the second communication device, fifth signaling, the fifth signaling being used to indicate transmit power of the second communication device.

[0412] In some embodiments, the sending module 2310 is further configured to send, to a network device, sixth signaling, the sixth signaling being used to request the network device to indicate transmit power of the apparatus and / or the second communication device.

[0413] In some embodiments, the receiving module 2330 is further configured to receive, from the network device, seventh signaling, the seventh signaling being used to indicate transmit power of the apparatus and / or the second communication device.

[0414] In some embodiments, the processing module 2350 is configured to adjust transmit power of the first carrier.

[0415] In some embodiments, the D2R transmission comprises one or more of: a random identity; a device identity; a command-based feedback message; a query message-based feedback message; a repeated query message-based feedback message; a paging message-based feedback message.

[0416] In some embodiments, the receiving module 2330 is further configured to receive the D2R transmission from the A-IoT device.

[0417] In some embodiments, the apparatus comprises any one of: a base station, an intermediate node, a carrier node; and the second communication device comprises any one of: a base station, an intermediate node, a carrier node.

[0418] In summary, the apparatus provided by the embodiments of the present application supports providing a first carrier for an A-IoT device, and the A-IoT device performs D2R transmission by using the first carrier provided by the apparatus and a second carrier provided by a second communication device. Since the D2R transmission is implemented by using at least two carriers to realize backscattering, even if the channel quality of one of the carriers is poor, the A-IoT device can still perform D2R transmission through the other carrier, effectively ensuring the reliability of the D2R transmission. Moreover, since the apparatus only needs to send a single-tone carrier, without splitting its own transmission power, the coverage of the carrier and the uplink coverage of the D2R transmission can be ensured. In addition, if the apparatus and the second communication device are at different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is conducive to the D2R transmission against channel fading.

[0419] FIG. 24 shows a structural block diagram of a carrier transmission apparatus provided by an example embodiment of the present application, which can be implemented as the second communication device described above or as a part of the second communication device described above. The apparatus includes a sending module 2410. Optionally, the apparatus further includes a receiving module 2430 and / or a processing module 2450. Optionally, the apparatus is a wireless communication device / wireless device supporting a 3GPP protocol. Optionally, the apparatus is a wireless communication device / wireless device supporting an 802.11 protocol.

[0420] The sending module 2410 is configured to send a second carrier to an A-IoT device, the second carrier being used for the A-IoT device to perform device-to-reader (D2R) transmission, and the first carrier being sent by a first communication device.

[0421] In some embodiments, a time domain position of the first carrier is associated with a time domain position of the second carrier; and / or, a frequency domain position of the first carrier is associated with a frequency domain position of the second carrier.

[0422] In some embodiments, the association between the time domain position of the first carrier and the time domain position of the second carrier includes one or more of the following: the time domain start position of the first carrier is aligned with the time domain start position of the second carrier; the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; the time domain end position of the first carrier is aligned with the time domain end position of the second carrier; and the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval.

[0423] In some embodiments, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of: a spacing between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a coherence bandwidth of a channel; a spacing between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a bandwidth of a D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

[0424] In some embodiments, the receiving module 2430 is configured to receive first signaling transmitted by the first communication device, the first signaling being used to indicate the time domain position and / or the frequency domain position of the second carrier.

[0425] In some embodiments, the first signaling is transmitted by the first communication device to the apparatus in a case where a first condition and / or a second condition is met.

[0426] In some embodiments, the first carrier and / or the second carrier meet one or more of: the time domain position of the first carrier is indicated by third signaling; the frequency domain position of the first carrier is indicated by the third signaling; the time domain position of the second carrier is indicated by the third signaling; the frequency domain position of the second carrier is indicated by the third signaling; wherein the third signaling is transmitted by a network device.

[0427] In some embodiments, the third signaling is transmitted by the network device based on second signaling, the second signaling being used to request a scheduled carrier transmission.

[0428] In some embodiments, the receiving module 2430 is further configured to receive the third signaling.

[0429] In some embodiments, the time domain position and / or the frequency domain position of the first carrier is indicated by third signaling, the third signaling being transmitted by a network device; the time domain position and / or the frequency domain position of the second carrier is indicated by fourth signaling, the fourth signaling being transmitted by the network device.

[0430] In some embodiments, the third signaling and the fourth signaling are transmitted by the network device based on second signaling, the second signaling being used to request a scheduled carrier transmission.

[0431] In some embodiments, the receiving module 2430 is further configured to receive the fourth signaling.

[0432] In some embodiments, the second signaling is transmitted by the first communication device to the network device in a case where a first condition and / or a second condition is met.

[0433] In some embodiments, the first carrier is transmitted by the first communication device to the A-IoT device under a first condition and / or a second condition.

[0434] In some embodiments, the first condition comprises one or more of: a number of times that the first communication device does not receive a corresponding D2R transmission after transmitting a reader-to-device (R2D) transmission is greater than or equal to a first threshold; a number of times that the first communication device fails to receive a D2R transmission is greater than or equal to a second threshold; a received signal measurement obtained by the first communication device is less than or equal to a third threshold.

[0435] In some embodiments, the R2D transmission comprises one or more of: a query message; a repeated query message; a paging message; a feedback message based on a random identifier; a feedback message based on a device identifier; a command.

[0436] In some embodiments, the second condition comprises one or more of: a number of times that the first communication device transmits a fifth signaling is greater than or equal to a fourth threshold, the fifth signaling being used to indicate a transmission power of the apparatus; a number of times that the first communication device transmits a sixth signaling is greater than or equal to a fifth threshold, the sixth signaling being used to request a network device to indicate a transmission power of the first communication device and / or the apparatus; a number of times that the first communication device adjusts a transmission power is greater than or equal to a sixth threshold.

[0437] In some embodiments, the receiving module 2430 is further configured to receive a fifth signaling, the fifth signaling being used to indicate a transmission power of the apparatus.

[0438] In some embodiments, the receiving module 2430 is further configured to receive a seventh signaling transmitted by a network device, the seventh signaling being used to indicate a transmission power of the first communication device and / or the apparatus.

[0439] In some embodiments, the processing module 2450 is configured to adjust a transmission power of the second carrier.

[0440] In some embodiments, the D2R transmission comprises one or more of: a random identifier; a device identifier; a feedback message based on a command; a feedback message based on a query message; a feedback message based on a repeated query message; a feedback message based on a paging message.

[0441] In some embodiments, the first communication device comprises any one of: a base station, an intermediate node, a carrier node; and the apparatus comprises any one of: a base station, an intermediate node, a carrier node.

[0442] In conclusion, the device provided by the embodiment of the present application supports providing a second carrier for the A-IoT device, and the A-IoT device performs D2R transmission by using the first carrier provided by the first communication device and the second carrier provided by the device. Since the D2R transmission is implemented by using at least two carriers to realize backscattering, the reliability of the D2R transmission is effectively guaranteed. Moreover, since the device only needs to send a single-tone carrier, without splitting the transmission power of the device, the coverage of the carrier and the uplink coverage of the D2R transmission can be guaranteed. In addition, if the first communication device and the device are located at different positions, such as different directions relative to the A-IoT device, spatial gain can be further provided, which is conducive to the D2R transmission against channel fading.

[0443] It should be noted that: the device provided by the above embodiment only divides the above-mentioned functional modules for example to realize its function, and in actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the communication device is divided into different functional modules to complete all or part of the above-described functions. In addition, the device and method embodiments provided by the above embodiments belong to the same concept.

[0444] FIG. 25 shows a structural schematic diagram of a communication device 2500 provided by an example embodiment of the present application, which includes at least one of the following: a receiver 2501, a transmitter 2502, a processor 2503, a memory 2504, and a bus (not shown in the figure).

[0445] The receiver 2501 is configured to implement the receiving function, and the transmitter 2502 is configured to implement the sending function. Optionally, the receiver 2501 and the transmitter 2502 can be implemented as a communication component, which can be a communication chip. The communication component can be referred to as a transceiver. Optionally, the receiver 2501 and the transmitter 2502 can be implemented as a wireless communication component and / or a wired communication component. Optionally, the wireless communication component includes a wireless communication chip and / or a radio frequency antenna. Optionally, the wired communication component includes a wired communication chip and / or a wired interface.

[0446] The processor 2503 includes one or more processing cores. The processor 2503 executes various functional applications and information processing by running software programs and modules.

[0447] The memory 2504 can be used to store computer programs executed by the processor 2503. The processor 2503 is configured to execute the computer programs to implement each step in the above method embodiments.

[0448] In some embodiments, the communication device 2500 is configured to perform some or all of the steps performed by the first communication device described above. The receiver 2501 can be configured to implement the functions and steps of the receiving module 2330 described above, the transmitter 2502 can be configured to implement the functions and steps of the transmitting module 2310 described above, and the processor 2503 can be configured to implement the functions and steps of the processing module 2350 described above.

[0449] In some embodiments, the communication device 2500 is configured to perform some or all of the steps performed by the second communication device described above. The receiver 2501 can be configured to implement the functions and steps of the receiving module 2430 described above, the transmitter 2502 can be configured to implement the functions and steps of the transmitting module 2410 described above, and the processor 2503 can be configured to implement the functions and steps of the processing module 2450 described above.

[0450] In some embodiments, the memory 2504 can be connected to the processor 2503, and to the receiver 2501 and the transmitter 2502.

[0451] In addition, the memory 2504 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof, including but not limited to a magnetic disk or a optical disk, an EEPROM (Electrically-Erasable Programmable Read Only Memory), an EPROM (Erasable Programmable Read Only Memory), an SRAM (Static Random Access Memory), a ROM (Read-Only Memory), a magnetic memory, a flash memory, a PROM (Programmable Read-Only Memory).

[0452] In some embodiments, the receiver 2501 receives signals / data independently, or the processor 2503 controls the receiver 2501 to receive signals / data, or the processor 2503 requests the receiver 2501 to receive signals / data, or the processor 2503 cooperates with the receiver 2501 to receive signals / data.

[0453] In some embodiments, the transmitter 2502 transmits signals / data independently, or the processor 2503 controls the transmitter 2502 to transmit signals / data, or the processor 2503 requests the transmitter 2502 to transmit signals / data, or the processor 2503 cooperates with the transmitter 2502 to transmit signals / data.

[0454] For details not described in the present embodiment, please refer to the above embodiments, which will not be repeated here.

[0455] FIG. 26 shows a structural schematic diagram of a communication device 2600 according to an example embodiment of the present application, which includes at least one of a receiver 2610, a transmitter 2620, a processor 2630, a memory 2640, and a bus (not shown in the figure). The communication device 2600 can be used to perform part or all of the steps performed by the A-IoT device described above.

[0456] The receiver 2610 is configured to implement a receiving function, and the transmitter 2620 is configured to implement a transmitting function.

[0457] In some embodiments, the receiver 2610 and the transmitter 2620 can be implemented as one communication component, which can be a communication chip. The communication component can be referred to as a transceiver. For example, the receiver 2610 and the transmitter 2620 are implemented as one wireless communication component. Optionally, the wireless communication component includes a wireless communication chip and / or a radio frequency antenna (not shown in the figure).

[0458] In some embodiments, the receiver 2610 can be configured to implement the functions and steps of the receiving module 2230 described above. Optionally, the receiver 2610 can be implemented as a first receiver 2613 and a second receiver 2615. Optionally, the first receiver 2613 and the second receiver 2615 are two independent receivers, i.e., the receiver 2610 includes two independent first receiver 2613 and second receiver 2615. Optionally, the receiver 2610 is implemented as a combined receiver of the first receiver 2613 and the second receiver 2615.

[0459] In some embodiments, the first receiver 2613 is implemented as a wake-up receiver (WUR), which can also be referred to as a low power WUR (LP-WUR), an ultra low power WUR (ULP-WUR), a low power receiver, an ultra low power receiver, a zero power receiver, a secondary receiver, etc.

[0460] In some embodiments, the second receiver 2615 is implemented as a main receiver or a legacy receiver.

[0461] In some embodiments, the transmitter 2620 can be configured to implement the functions and procedures of the sending module 2210 described above. Optionally, the transmitter 2620 can be implemented as a first transmitter 2623 and / or a second transmitter 2625. Optionally, the first transmitter 2623 and the second transmitter 2625 are two transmitters working independently, i.e., the transmitter 2620 includes two independent first transmitter 2623 and second transmitter 2625. Optionally, the transmitter 2620 is implemented as a combined transmitter of the first transmitter 2623 and the second transmitter 2625.

[0462] In some embodiments, the first transmitter 2623 is implemented as a backscatter transmitter, and the second transmitter 2625 is implemented as a main transmitter.

[0463] In some embodiments, the processor 2630 and the receiver 2610 can be implemented as one module, or the processor 2630 can be implemented as a part of the receiver 2610.

[0464] The processor 2630 includes one or more processing cores, and the processor 2630 performs various functional applications and information processing by running software programs and modules. In some embodiments, the processor 2630 can be configured to implement the functions and procedures of the processing module 2250 described above.

[0465] The memory 2640 can be configured to store computer programs for the processor 2630 to execute, so as to implement various steps in the method embodiments described above.

[0466] In some embodiments, the memory 2640 can be connected to the processor 2630, the receiver 2610, and the transmitter 2620. In addition, the memory 2640 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, including but not limited to: magnetic or optical disks, EEPROM, EPROM, SRAM, ROM, magnetic memory, flash memory, PROM.

[0467] In some embodiments, the receiver 2610 receives signals / data independently, or the processor 2630 controls the receiver 2610 to receive signals / data, or the processor 2630 requests the receiver 2610 to receive signals / data, or the processor 2630 cooperates with the receiver 2610 to receive signals / data.

[0468] In some embodiments, the transmitter 2620 sends the signal / data independently, or the processor 2630 controls the transmitter 2620 to send the signal / data, or the processor 2630 requests the transmitter 2620 to send the signal / data, or the processor 2630 cooperates with the transmitter 2620 to send the signal / data.

[0469] For details not described in the present embodiment, refer to the foregoing embodiments, which will not be repeated here.

[0470] In an example embodiment of the present application, a chip is also provided, which includes programmable logic circuit and / or program instructions, and when the chip is running on a communication device, is used to implement the carrier transmission method provided by each of the foregoing method embodiments.

[0471] In some embodiments, the chip includes the sending module 2210. Optionally, the chip further includes the receiving module 2230 and / or the processing module 2250. Optionally, each module can be implemented as a circuit structure. For related content, refer to the foregoing description, which will not be repeated here.

[0472] In some embodiments, the chip includes the sending module 2310. Optionally, the chip further includes the receiving module 2330 and / or the processing module 2350. Optionally, each module can be implemented as a circuit structure. For related content, refer to the foregoing description, which will not be repeated here.

[0473] In some embodiments, the chip includes the sending module 2410. Optionally, the chip further includes the receiving module 2430 and / or the processing module 2450. Optionally, each module can be implemented as a circuit structure. For related content, refer to the foregoing description, which will not be repeated here.

[0474] In an example embodiment of the present application, a computer readable storage medium is also provided, and the computer readable storage medium stores at least one program, and the at least one program is loaded and executed by a processor to implement the carrier transmission method provided by each of the foregoing method embodiments.

[0475] In an example embodiment of the present application, a computer program product is also provided, and the computer program product includes computer instructions stored in a computer readable storage medium, and a processor acquires the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to implement the carrier transmission method provided by each of the foregoing method embodiments.

[0476] In an example embodiment of the present application, a computer program is also provided, the computer program comprising computer instructions stored in a computer readable storage medium, a processor obtaining the computer instructions from the computer readable storage medium, and the processor executing the computer instructions to implement the carrier transmission method provided by each of the above method embodiments.

[0477] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by program instructing relevant hardware to complete, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0478] The above are only optional embodiments of the present application, and are not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A carrier transmission method, characterized by, The method is performed by an environmental energy Internet of Things A-IoT device, and the method comprises: performing device-to-reader D2R transmission based on a first carrier and a second carrier, the first carrier being transmitted by a first communication device, and the second carrier being transmitted by a second communication device.

2. The method of claim 1, wherein, a time domain position of the first carrier is associated with a time domain position of the second carrier; and / or, a frequency domain position of the first carrier is associated with a frequency domain position of the second carrier.

3. The method of claim 2, wherein, the time domain position of the first carrier is associated with the time domain position of the second carrier, comprising one or more of: a time domain start position of the first carrier is aligned with a time domain start position of the second carrier; an interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; a time domain end position of the first carrier is aligned with a time domain end position of the second carrier; an interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval.

4. The method according to claim 2 or 3, characterized in that, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, comprising one or more of: an interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a coherence bandwidth of a channel; an interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a bandwidth of the D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

5. The method according to any one of claims 1 to 4, characterized in that, the time domain position and / or the frequency domain position of the second carrier is indicated by first signaling, the first signaling being transmitted by the first communication device to the second communication device.

6. The method of claim 5, wherein, the first signaling is transmitted by the first communication device to the second communication device in a case where a first condition and / or a second condition is met.

7. The method according to any one of claims 1 to 4, characterized in that, the first carrier and / or the second carrier meets one or more of: a time domain position of the first carrier is indicated by third signaling; a frequency domain position of the first carrier is indicated by the third signaling; a time domain position of the second carrier is indicated by the third signaling; a frequency domain position of the second carrier is indicated by the third signaling; wherein the third signaling is transmitted by a network device.

8. The method of claim 7, wherein, the third signaling is transmitted by the network device based on second signaling, the second signaling being used to request a scheduled carrier transmission.

9. The method of any one of claims 1 to 4, wherein: a time domain position and / or a frequency domain position of the first carrier is indicated by third signaling, the third signaling being transmitted by a network device; a time domain position and / or a frequency domain position of the second carrier is indicated by fourth signaling, the fourth signaling being transmitted by the network device.

10. The method of claim 9, wherein, the third signaling and the fourth signaling are transmitted by the network device based on second signaling, the second signaling being used to request a scheduled carrier transmission.

11. The method according to claim 8 or 10, characterized in that, the second signaling is transmitted by the first communication device to the network device in a case where a first condition and / or a second condition is met.

12. The method according to any one of claims 1 to 11, characterized in that, the first carrier is transmitted by the first communication device to the A-IoT device in a case where a first condition and / or a second condition is met.

13. The method according to claim 6 or 11 or 12, characterized in that, the first condition comprises one or more of: The first communication device sends a reader-to-device R2D transmission, and the number of times that the first communication device does not receive a corresponding device-to-reader D2R transmission is greater than or equal to a first threshold value; The number of times that the first communication device fails to receive a D2R transmission is greater than or equal to a second threshold value; The received signal measurement value obtained by the first communication device is less than or equal to a third threshold value.

14. The method of claim 13, wherein, The R2D transmission includes one or more of the following: a query message; a repeated query message; a paging message; a feedback message based on a random identifier; a feedback message based on a device identifier; a command.

15. The method of claim 6 or 11 or 12, wherein, The second condition includes one or more of the following: The number of times that the first communication device sends fifth signaling for indicating the transmission power of the second communication device is greater than or equal to a fourth threshold value; The number of times that the first communication device sends sixth signaling for requesting a network device to indicate the transmission power of the first communication device and / or the second communication device is greater than or equal to a fifth threshold value; The number of times that the first communication device adjusts the transmission power is greater than or equal to a sixth threshold value.

16. The method according to any one of claims 1 to 15, characterized in that, The D2R transmission includes one or more of the following: a random identifier; a device identifier; a feedback message based on a command; a feedback message based on a query message; a feedback message based on a repeated query message; a feedback message based on a paging message.

17. The method of any one of claims 1 to 16, wherein, The first communication device includes any one of the following: a base station, an intermediate node, and a carrier node; and the second communication device includes any one of the following: a base station, an intermediate node, and a carrier node.

18. A carrier transmission method, characterized by, The method is performed by a first communication device, and the method includes: sending, to an ambient-capable Internet of Things A-IoT device, a first carrier, the first carrier being used for device-to-reader D2R transmission of the A-IoT device together with a second carrier, the second carrier being sent by a second communication device.

19. The method of claim 18, wherein, The time domain position of the first carrier is associated with the time domain position of the second carrier; and / or, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier.

20. The method of claim 19, wherein, The time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of the following: the time domain start position of the first carrier is aligned with the time domain start position of the second carrier; the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; the time domain end position of the first carrier is aligned with the time domain end position of the second carrier; the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval.

21. The method of claim 19 or 20, wherein, The frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of the following: the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the coherence bandwidth of a channel; the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the bandwidth of a D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

22. The method of any one of claims 18-21, wherein, The method further includes: sending, to the second communication device, first signaling for indicating the time domain position and / or the frequency domain position of the second carrier. The time domain position of the first carrier is associated with the time domain position of the second carrier; and / or, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier. The time domain position of the first carrier is associated with the time domain position of the second carrier, including one or more of the following: the time domain start position of the first carrier is aligned with the time domain start position of the second carrier; the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; the time domain end position of the first carrier is aligned with the time domain end position of the second carrier; the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval. The frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, including one or more of the following: the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the coherence bandwidth of a channel; the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to the bandwidth of a D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier. The method further includes: sending, to the second communication device, first signaling for indicating the time domain position and / or the frequency domain position of the second carrier.

23. The method of claim 22, wherein, The sending the first signaling to the second communication device comprises: The sending the first signaling to the second communication device comprises:

24. The method of any one of claims 18-21, wherein, The first carrier and / or the second carrier satisfy one or more of the following: a time domain position of the first carrier is indicated by third signaling; a frequency domain position of the first carrier is indicated by the third signaling; a time domain position of the second carrier is indicated by the third signaling; a frequency domain position of the second carrier is indicated by the third signaling; The third signaling is sent by a network device.

25. The method of claim 24, wherein, The third signaling is sent by the network device based on second signaling used for requesting scheduling carrier transmission.

26. The method of any of claims 18-21, wherein: The time domain position and / or the frequency domain position of the first carrier is indicated by third signaling sent by a network device; The time domain position and / or the frequency domain position of the second carrier is indicated by fourth signaling sent by the network device.

27. The method of claim 26, wherein, The third signaling and the fourth signaling are sent by the network device based on second signaling used for requesting scheduling carrier transmission.

28. The method of claim 25 or 27, wherein, The method further comprises: The sending the second signaling to the network device comprises:

29. The method according to any one of claims 24 to 28, characterized in that, The method further comprises: receiving the third signaling.

30. The method of any one of claims 18-29, wherein, The sending the first carrier to the A-IoT device comprises: The sending the first carrier to the A-IoT device comprises:

31. The method of claim 23 or 28 or 30, wherein, The first condition comprises one or more of the following: a number of times that the first communication device does not receive a corresponding D2R transmission after sending a reader-to-device (R2D) transmission is greater than or equal to a first threshold; a number of times that the first communication device fails to receive a D2R transmission is greater than or equal to a second threshold; a received signal measurement value obtained by the first communication device is less than or equal to a third threshold.

32. The method of claim 31, wherein, The R2D transmission comprises one or more of the following: a query message; a repeated query message; a paging message; a feedback message based on a random identifier; a feedback message based on a device identifier; a command.

33. The method of claim 23 or 28 or 30, wherein, The second condition comprises one or more of the following: a number of times that the first communication device sends fifth signaling used for indicating a transmission power of the second communication device is greater than or equal to a fourth threshold; a number of times that the first communication device sends sixth signaling used for requesting a network device to indicate a transmission power of the first communication device and / or the second communication device is greater than or equal to a fifth threshold; a number of times that the first communication device adjusts a transmission power is greater than or equal to a sixth threshold.

34. The method of any one of claims 18-33, wherein, The method further comprises one or more of the following: The sending the fifth signaling to the second communication device comprises: The sending the sixth signaling to the network device comprises: receive seventh signaling sent by the network device, the seventh signaling being used to indicate a transmission power of the first communication device and / or the second communication device; adjust the transmission power of the first carrier.

35. The method of any one of claims 18-34, wherein, The D2R transmission comprises one or more of the following: a random identifier; a device identifier; a command-based feedback message; a feedback message based on a query message; a feedback message based on a repeated query message; a feedback message based on a paging message.

36. The method of any one of claims 18-35, wherein, The method further comprises: receiving the D2R transmission from the A-IoT device.

37. The method of any one of claims 18-36, wherein, The first communication device comprises any one of the following: a base station, an intermediate node, a carrier node; and the second communication device comprises any one of the following: a base station, an intermediate node, a carrier node.

38. A carrier transmission method, comprising: The method is performed by a second communication device, and the method comprises: sending, to an ambient energy Internet of Things (A-IoT) device, a second carrier used for the A-IoT device to perform a device-to-reader (D2R) transmission, the first carrier being sent by a first communication device.

39. The method of claim 38, wherein, The time domain position of the first carrier is associated with the time domain position of the second carrier; and / or, the frequency domain position of the first carrier is associated with the frequency domain position of the second carrier.

40. The method of claim 39, wherein, The time domain position of the first carrier is associated with the time domain position of the second carrier, comprising one or more of the following: the time domain start position of the first carrier is aligned with the time domain start position of the second carrier; the interval between the time domain start position of the first carrier and the time domain start position of the second carrier is less than or equal to a first time domain interval; the time domain end position of the first carrier is aligned with the time domain end position of the second carrier; the interval between the time domain end position of the first carrier and the time domain end position of the second carrier is less than or equal to a second time domain interval.

41. The method of claim 39 or 40, wherein, The frequency domain position of the first carrier is associated with the frequency domain position of the second carrier, comprising one or more of the following: the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a coherence bandwidth of a channel; the interval between the frequency domain position of the first carrier and the frequency domain position of the second carrier is greater than or equal to a bandwidth of the D2R transmission; the frequency domain position of the first carrier is the same as the frequency domain position of the second carrier.

42. The method of any one of claims 38-41, wherein, The method further comprises: receiving first signaling sent by the first communication device, the first signaling being used to indicate the time domain position and / or the frequency domain position of the second carrier.

43. The method of claim 42, wherein, The first signaling is sent by the first communication device to the second communication device under the condition that a first condition and / or a second condition are met.

44. The method of any one of claims 38-41, wherein, The first carrier and / or the second carrier meet one or more of the following: the time domain position of the first carrier is indicated by third signaling; the frequency domain position of the first carrier is indicated by the third signaling; the time domain position of the second carrier is indicated by the third signaling; the frequency domain position of the second carrier is indicated by the third signaling; The third signaling is sent by a network device.

45. The method of claim 44, wherein, The third signaling is sent by the network device based on second signaling used to request scheduling carrier transmission.

46. The method of claim 44 or 45, wherein, The method further comprises: receiving the third signaling.

47. The method of any one of claims 38-41, wherein, The time domain position and / or the frequency domain position of the first carrier are indicated by third signaling, and the third signaling is sent by a network device; and the time domain position and / or the frequency domain position of the second carrier are indicated by fourth signaling, and the fourth signaling is sent by the network device.

48. The method of claim 47, wherein, The third signaling and the fourth signaling are sent by the network device based on second signaling used for requesting scheduling carrier transmission.

49. The method of claim 47 or 48, wherein, The method further comprises: receiving the fourth signaling.

50. The method of claim 45 or 48, wherein, The second signaling is sent by the first communication device to the network device under the condition that a first condition and / or a second condition are met.

51. The method of any one of claims 38-50, wherein, The first carrier is sent by the first communication device to the A-IoT device under the condition that a first condition and / or a second condition are met.

52. The method of claim 43 or 50 or 51, wherein, The first condition comprises one or more of the following: the number of times that the first communication device does not receive a corresponding D2R transmission after sending a reader-to-device R2D transmission is greater than or equal to a first threshold value; the number of times that the first communication device fails to receive a D2R transmission is greater than or equal to a second threshold value; a received signal measurement value obtained by the first communication device is less than or equal to a third threshold value.

53. The method of claim 52, wherein, The R2D transmission comprises one or more of the following: a query message; a repeated query message; a paging message; a feedback message based on a random identifier; a feedback message based on a device identifier; a command.

54. The method of claim 43 or 50 or 51, wherein, The second condition comprises one or more of the following: the number of times that the first communication device sends fifth signaling used for indicating the transmission power of the second communication device is greater than or equal to a fourth threshold value; the number of times that the first communication device sends sixth signaling used for requesting the network device to indicate the transmission power of the first communication device and / or the second communication device is greater than or equal to a fifth threshold value; and the number of times that the first communication device adjusts the transmission power is greater than or equal to a sixth threshold value.

55. The method of any one of claims 38-54, wherein, The method further comprises one or more of the following: receiving fifth signaling used for indicating the transmission power of the second communication device; receiving seventh signaling sent by a network device, the seventh signaling being used for indicating the transmission power of the first communication device and / or the second communication device; adjusting the transmission power of the second carrier.

56. The method of any one of claims 38-55, wherein, The D2R transmission comprises one or more of the following: a random identifier; a device identifier; a feedback message based on a command; a feedback message based on a query message; a feedback message based on a repeated query message; a feedback message based on a paging message.

57. The method of any one of claims 38-56, wherein, The first communication device comprises any one of the following: a base station, an intermediate node, and a carrier node; and the second communication device comprises any one of the following: a base station, an intermediate node, and a carrier node.

58. A carrier transmission device, comprising: The apparatus comprises: a sending module configured to perform device-to-reader D2R transmission based on a first carrier and a second carrier, the first carrier being sent by a first communication device, and the second carrier being sent by a second communication device.

59. A carrier transmission device, comprising: The apparatus comprises: a sending module configured to send a first carrier to an ambient Internet of Things A-IoT device, the first carrier and a second carrier being used by the A-IoT device to perform device-to-reader D2R transmission, and the second carrier being sent by a second communication device.

60. A carrier transmission device, comprising: The apparatus comprises: The sending module is configured to send a second carrier to an ambient Internet of Things (A-IoT) device, the second carrier being used for device-to-reader (D2R) transmission by the A-IoT device, and the first carrier being sent by a first communication device.

61. A communications device, characterized by The communication device comprises a transceiver; and the communication device is configured to perform the carrier transmission method according to any one of claims 1 to 17.

62. A communications device, characterized by The communication device comprises a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the carrier transmission method according to any one of claims 18 to 37.

63. A communications device, characterized by The communication device comprises a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the carrier transmission method according to any one of claims 38 to 57.

64. A computer-readable storage medium, characterized in that, The computer readable storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the carrier transmission method according to any one of claims 1 to 17, or the carrier transmission method according to any one of claims 18 to 37, or the carrier transmission method according to any one of claims 38 to 57.

65. A computer program product, characterised in that, The computer program product comprises computer instructions stored in a computer readable storage medium, and the processor obtains the computer instructions from the computer readable storage medium, and executes the computer instructions to implement the carrier transmission method according to any one of claims 1 to 17, or the carrier transmission method according to any one of claims 18 to 37, or the carrier transmission method according to any one of claims 38 to 57.

66. A chip, comprising: The chip comprises programmable logic circuitry and / or at least one program, and the chip is configured to implement the carrier transmission method according to any one of claims 1 to 17, or the carrier transmission method according to any one of claims 18 to 37, or the carrier transmission method according to any one of claims 38 to 57 based on the programmable logic circuitry and / or the at least one program.

Images