State switching method, communication device, system and storage medium

Abstract

The present disclosure discloses a state switching method, a communication device, a system and a storage medium, and relates to the field of wireless communication. The method comprises: obtaining base station state information; and switching the state of the communication device according to the data transmission requirement of the communication device and the base station state information, wherein the state of the communication device comprises one of a backscatter communication state, an energy collection state and an active communication state. The communication device of the present disclosure can switch among the backscatter communication state, the energy collection state and the active communication state, thereby meeting different communication requirements and improving the spectrum utilization and resource utilization.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of wireless communication, and particularly relates to a state switching method, a communication device, a system and a storage medium. BACKGROUND

[0002] Backscatter communication is a communication method that enables a node to transmit radio frequency signals without energy storage or even a transmitter. How to realize the conversion of backscatter communication devices between different modalities to meet different communication needs is a problem worth studying. SUMMARY

[0003] One of the technical problems to be solved by the present disclosure is to provide a state switching method, a communication device, a system and a storage medium, which can meet different communication needs.

[0004] According to an aspect of the present disclosure, a state switching method is provided, which is executed by a communication device and includes: obtaining base station state information; and switching a state of the communication device according to a data transmission requirement of the communication device and the base station state information, wherein the state of the communication device includes one of a backscatter communication state, an energy collection state and an active communication state.

[0005] In some embodiments, switching the state of the communication device according to the data transmission requirement of the communication device and the base station state information includes: in a case where the base station is in a communication state and the communication device has a data transmission requirement, the communication device is in the backscatter communication state.

[0006] In some embodiments, the backscatter communication state includes a first communication state and a second communication state, and wherein controlling the communication device to be in the backscatter communication state includes: receiving indication information sent by the base station, wherein the indication information includes whether the communication device is required to provide a communication link between the base station and a receiver; and controlling the communication device to be in the first communication state or the second communication state different from the first communication state according to the indication information.

[0007] In some embodiments, in a case where the communication device is in the first communication state, the communication device transmits first information to the receiver through a backscatter link and forwards second information sent by the base station to the receiver.

[0008] In some embodiments, the indication information is determined according to a transmission power and a modulation mode of the base station.

[0009] In some embodiments, in a case where the transmission power of the base station is greater than a power threshold and the modulation mode is frequency modulation or amplitude modulation, the indication information indicates that the communication device is required to provide the communication link between the base station and the receiver.

[0010] In some embodiments, the indication information is not required to be provided by the communication device for the base station to provide the communication link with the receiver, in case that the transmission power of the base station is less than or equal to a power threshold, or the modulation mode is phase modulation.

[0011] In some embodiments, the switching the state of the communication device according to the data transmission requirement of the communication device and the base station state information comprises: in case that the base station is in the communication state and the communication device has no data transmission requirement, the communication device is in the energy collection state.

[0012] In some embodiments, the modulation transmitter of the communication device is in the off state in case that the communication device is in the energy collection state.

[0013] In some embodiments, the switching the state of the communication device according to the data transmission requirement of the communication device and the base station state information comprises: in case that the base station is in the non-communication state and the communication device has data transmission requirement, the communication device is in the active communication state.

[0014] In some embodiments, the communication device transmits signals to the receiver using the collected energy in case that the communication device is in the active communication state.

[0015] According to another aspect of the present disclosure, a communication device is also provided, comprising: a first processing module configured to acquire base station state information; and a second processing module configured to switch the state of the communication device according to the data transmission requirement of the communication device and the base station state information, wherein the state of the communication device comprises one of a backscatter communication state, an energy collection state and an active communication state.

[0016] In some embodiments, the second processing module is configured to control the communication device to be in the backscatter communication state in case that the base station is in the communication state and the communication device has data transmission requirement.

[0017] In some embodiments, the second processing module is further configured to control the communication device to be in the energy collection state in case that the base station is in the communication state and the communication device has no data transmission requirement.

[0018] In some embodiments, the second processing module is further configured to control the communication device to be in the active communication state in case that the base station is in the non-communication state and the communication device has data transmission requirement.

[0019] According to another aspect of the present disclosure, a communication device is also provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute a state switching method as described above based on instructions stored in the memory.

[0020] According to another aspect of the present disclosure, a communication system is also provided, comprising: the communication device described above; and a base station configured to send base station state information to the communication device.

[0021] In some embodiments, the receiver is configured to receive information sent by the communication device and the base station.

[0022] In some embodiments, the communication device is a backscatter communication device.

[0023] According to another aspect of the present disclosure, a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the state switching method described above.

[0024] In the embodiments of the present disclosure, the communication device can switch among the backscatter communication state, the energy collection state and the active communication state according to data transmission requirements and base station state information, so as to meet different communication requirements and improve spectrum utilization and resource utilization.

[0025] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the following drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] The present disclosure can be understood more fully with reference to the following detailed description, in conjunction with the accompanying drawings, in which:

[0028] Figure 1 Flowchart of some embodiments of the state switching method of the present disclosure;

[0029] Figure 2 Flowchart of some other embodiments of the state switching method of the present disclosure;

[0030] Figure 3 Structure diagram of some embodiments of the ambient backscatter communication system of the present disclosure;

[0031] Figure 4 Structure diagram of some embodiments of the communication system of the present disclosure;

[0032] Figure 5 Structure diagram of some embodiments of the communication device of the present disclosure;

[0033] Figure 6 Structure diagram of some other embodiments of the communication device of the present disclosure; and

[0034] Figure 7Structure diagram of another embodiment of the communication system of the present disclosure. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present disclosure unless otherwise specifically stated.

[0036] Meanwhile, it should be understood that the sizes of the various portions shown in the drawings are exaggerated for illustrative purposes and are not necessarily drawn to scale.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the scope of the disclosure, its application, or uses.

[0038] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be considered part of the specification.

[0039] In all of the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of exemplary embodiments can have different values.

[0040] It should be noted that like reference numerals and letters refer to like items throughout the drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0041] In order to make the purposes, technical solutions, and advantages of the present disclosure clearer, the present disclosure is further described in detail below with reference to specific embodiments and in conjunction with the accompanying drawings.

[0042] The principle of backscatter communication is to create a modulated reflection (backscatter modulation) in an incident radio frequency wave that can be received by a receiver (reader) that is a backscatter communication device. Generally, the reflection of backscatter communication is created by changing the impedance of an antenna that is tuned to resonate at the desired radio frequency signal frequency. In this way, wireless nodes or "tags" can be placed in almost any environment without the need for a power source and can be powered by the tag. The tag can be interrogated by a reader that can send information to the tag or receive information sent by the tag. In a multiple access scenario, a single reader can serve multiple tags distributed throughout an environment, enabling the tags to perform sensing / data logging information on demand or continuously.

[0043] Another method of backscatter communication is to use radio frequency signals already present in the environment, such as WiFi, cellular communication, AM / FM radio, digital television, etc. Utilizing existing radio frequency signals already present in the environment can enable a backscatter communication network to operate without a reader that is powered on for the tags. These tags can operate as a mesh network and store data for transmission at a later query or when in communication with a gateway that allows access to a broader network. In this way, lower power wireless nodes can be implemented without the need for energy-expensive radio frequency transmitters within the nodes, or backscatter communication technology can be incorporated in typical Internet of Things wireless nodes to provide the option of lower power consumption wireless communication, thereby extending battery life in the presence of externally available radio frequency signals.

[0044] Figure 1 A flowchart for some embodiments of the state switching method of the present disclosure is shown, which is performed by a communication device, which is a backscatter communication device.

[0045] In step 110, base station state information is acquired.

[0046] In some embodiments, the base station state information includes that the base station is in a communication state or that the base station is in a non-communication state.

[0047] In step 120, the state of the communication device is switched according to the data transmission requirement of the communication device and the base station state information, wherein the state of the communication device includes one of a backscatter communication state, an energy collection state, and an active communication state.

[0048] In some embodiments, when the base station is in a communication state and the communication device has a data transmission requirement, the communication device is in a backscatter communication state. When the communication device is in the backscatter communication state, it transmits data with the receiver using the signal of the base station as an excitation source.

[0049] For example, the communication device is configured with an excitation carrier detection device for detecting whether there is an excitation carrier in the environment for backscatter communication.

[0050] In some embodiments, when the base station is in a communication state and the communication device has no data transmission requirement, the communication device is in an energy collection state. When the communication device is in the energy collection state, the transmitter is turned off and the energy collection function is turned on. If there is a burst data transmission, the communication device can switch the state to the backscatter communication state or the active communication state at any time.

[0051] In some embodiments, the communication device is in the active communication state when the base station is in the non-communication state and the communication device has a data transmission requirement. When the communication device is in the active communication state, the communication device transmits a signal to the receiver using the collected energy.

[0052] In the above embodiment, the communication device can switch among the backscatter communication state, the energy collection state and the active communication state according to the data transmission requirement and the base station state information, so as to meet different communication requirements.

[0053] Figure 2 A flowchart of another embodiment of the state switching method of the present disclosure is shown. In this embodiment, the backscatter communication state is divided into a first communication state and a second communication state.

[0054] In step 210, the indication information transmitted by the base station is received, wherein the indication information includes whether the communication device is required to provide a communication link between the base station and the receiver.

[0055] The communication device provides the communication link between the base station and the receiver, i.e., provides a multipath for the base station and the receiver. For example, the receiver periodically reports the signal strength of the direct link signal received by the receiver. If the signal transmitted by the transmitter of the base station to the receiver through the direct link is weak, the transmitter of the base station sends multipath indication information to the communication device.

[0056] In some embodiments, the indication information is determined according to the transmission power and the modulation mode of the base station.

[0057] For example, when the transmission power of the base station is greater than a power threshold and the modulation mode is frequency modulation or amplitude modulation, the indication information indicates that the communication device is required to provide the communication link between the base station and the receiver. In this embodiment, the modulation mode can be used as an excitation source of the communication device.

[0058] For another example, when the transmission power of the base station is less than or equal to the power threshold or the modulation mode is phase modulation, the indication information indicates that the communication device is not required to provide the communication link between the base station and the receiver.

[0059] In some embodiments, the indication information is transmitted by the base station to the communication device through a broadcast channel.

[0060] For example, the base station transmits the indication information to the communication device through a PBCH (Physical Broadcast Channel).

[0061] In some embodiments, the indication information can also be transmitted by the base station to the communication device through a multicast or the like.

[0062] In some embodiments, the base station is capable of sending indication information to the plurality of communication devices if there are a plurality of communication devices in the environment.

[0063] At step 220, the communication device is controlled to be in a first communication state or a second communication state different from the first communication state according to the indication information.

[0064] In some embodiments, the first communication state is a reciprocal communication state, i.e., the communication device is in the first communication state, the communication device sends first information to the receiver through the backscatter link and forwards second information sent by the base station to the receiver.

[0065] In some embodiments, the second communication state is an interference communication state.

[0066] As Figure 3 shown in the figure, in this embodiment, the reciprocal communication and the interference communication are introduced by taking the environment backscatter communication as an example.

[0067] The receiver 310 of the environment communication system receives the communication signal from the transmitter 320 of the environment communication system, and the signal of the transmitter 320 of the environment communication system is used as the radio frequency excitation of the reflection communication system, and the reflection device 330 of the reflection communication system communicates with the receiver 340 of the reflection communication system by using the radio frequency excitation. Figure 3 As can be seen from the figure, there are two interference links, the first one is the direct link interference of the transmitter of the environment communication system to the receiver of the reflection communication system, and the second one is the reflection link interference of the reflection device of the reflection communication system to the receiver of the environment communication system.

[0068] If the reflection device can use its reflection ability to provide multipath for the environment communication system, the environment communication system will have better signal-to-noise ratio, thereby offsetting the interference of the reflection link to the environment communication system. At this time, the environment communication system provides the excitation source for the transmission communication system, and the transmission communication system provides the multipath for the environment communication system, and the reciprocal communication is realized between the two systems.

[0069] In the present disclosure, as Figure 4As shown, the base station 410 and the receiver 420 communicate through a direct link. The base station 410 sends the communication device 430 the indication information of providing multipath for the base station and the receiver, and if the communication device 410 has data transmission requirement, the communication device 410 and the receiver 420 communicate through a reflection link, and if the base station 410 is in the communication state, the communication device 410 switches to the first communication state, and the communication device 410 and the receiver 420 communicate reciprocally with the base station 410 and the receiver 420. If the base station 410 does not send the communication device 430 the indication information of providing multipath for the base station and the receiver, or the base station 410 sends the communication device 430 the indication information of not requiring the communication device to provide multipath for the base station and the receiver, but the communication device 410 has data transmission requirement, and the base station 410 is in the communication state, the communication device 410 switches to the second communication state, and the communication between the communication device 410 and the receiver 420 interferes with the communication between the base station 410 and the receiver 420.

[0070] In the above embodiment, the communication device in the backscattering communication state can be further divided into two states, which greatly improves the completeness of the reciprocal communication technical solution, and helps to improve the spectrum utilization and resource utilization.

[0071] In some embodiments of the present disclosure, when the base station is in the communication state and the communication device has no data transmission requirement, the communication device is in the energy collection state, and when the communication device is in the energy collection state, the modulation transmitter of the communication device is in the closed state.

[0072] In this embodiment, the communication device has an energy collection and storage device, for example, the communication device collects light energy, wind energy, electromagnetic energy and the like, and the energy is used for emergency data transmission of the communication device when there is no excitation source in the environment, thereby improving the effect and stability of data transmission.

[0073] Figure 5 FIG. 1 is a structural schematic diagram of some embodiments of the communication device of the present disclosure, for example, a backscattering communication device.

[0074] The communication device includes a first processing module 510 and a second processing module 520.

[0075] The first processing module 510 is configured to obtain base station state information.

[0076] In some embodiments, the base station state information includes that the base station is in the communication state or the base station is in the non-communication state.

[0077] The second processing module 520 is configured to switch the state of the communication device according to the data transmission requirement of the communication device and the state information of the base station, wherein the state of the communication device comprises one of a backscatter communication state, an energy collection state and an active communication state.

[0078] In some embodiments, the second processing module 520 is further configured to control the communication device to be in the energy collection state when the base station is in the communication state and the communication device has no data transmission requirement. When the communication device is in the backscatter communication state, the communication device transmits data to the receiver using the signal of the base station as the excitation source.

[0079] For example, the communication device is configured with an excitation carrier detection apparatus for detecting whether there is an excitation carrier in the environment for backscatter communication.

[0080] In some embodiments, the second processing module 520 is further configured to control the communication device to be in the energy collection state when the base station is in the communication state and the communication device has no data transmission requirement. When the communication device is in the energy collection state, the modulated transmitter of the communication device is in an off state.

[0081] In some embodiments, the second processing module 520 is further configured to control the communication device to be in the active communication state when the base station is in the non-communication state and the communication device has data transmission requirement. When the communication device is in the active communication state, the communication device transmits signals to the receiver using the collected energy.

[0082] In the above embodiments, the communication device can switch among the backscatter communication state, the energy collection state and the active communication state according to the data transmission requirement and the state information of the base station, so as to meet different communication requirements, and help improve the spectrum utilization and resource utilization.

[0083] In some other embodiments of the present disclosure, the first processing module 510 is further configured to receive indication information sent by the base station, wherein the indication information comprises whether the communication device is required to provide a communication link between the base station and the receiver.

[0084] In some embodiments, the indication information is determined according to the transmission power and the modulation mode of the base station.

[0085] For example, when the transmission power of the base station is greater than a power threshold and the modulation mode is frequency modulation or amplitude modulation, the indication information indicates that the communication device is required to provide a communication link between the base station and the receiver.

[0086] For another example, when the transmission power of the base station is less than or equal to the power threshold or the modulation mode is phase modulation, the indication information indicates that the communication device is not required to provide a communication link between the base station and the receiver.

[0087] In some embodiments, the indication information is sent by the base station to the communication device through a broadcast channel.

[0088] In some embodiments, if there are multiple communication devices in the environment, the base station can send the indication information to the multiple communication devices.

[0089] The second processing module 520 is further configured to control the communication device to be in a first communication state or a second communication state different from the first communication state according to the indication information. Both the first communication state and the second communication state belong to the backscattering communication state.

[0090] In some embodiments, when the communication device is in the first communication state, the communication device sends first information to the receiver through the backscattering link and forwards second information sent by the base station to the receiver.

[0091] In some embodiments, the second communication state is an interference communication state. That is, the communication between the communication device and the receiver interferes with the communication between the base station and the receiver.

[0092] In the above embodiments, the completeness of the reciprocal communication technical solution is greatly improved.

[0093] In some embodiments of the present disclosure, the communication device is configured with an excitation carrier detection device for detecting whether there is an excitation carrier in the environment for backscattering communication.

[0094] In some embodiments of the present disclosure, the communication device has an energy collection and storage device, for example, the communication device collects light energy, wind energy, electromagnetic energy and the like, and the energy is used for emergency data transmission of the communication device when there is no excitation source in the environment, thereby improving the effect and stability of data transmission.

[0095] Figure 6 For the structure schematic diagram of another embodiment of the communication device of the present disclosure, the communication device 600 has a memory 610 and a processor 620. Among them: the memory 610 can be a disk, a flash memory or any other non-volatile storage medium. The memory is used to store the instructions in the above embodiments. The processor 620 is coupled to the memory 610 and can be implemented as one or more integrated circuits, such as a microprocessor or a microcontroller. The processor 620 is used to execute the instructions stored in the memory.

[0096] In some embodiments, the processor 620 is coupled to the memory 610 through a BUS bus 630. The communication device 600 can also be connected to an external storage system 650 through a storage interface 640 to call external data, and can also be connected to a network or another computer system (not shown) through a network interface 660. Here, no longer detailed.

[0097] In the embodiment, the data instructions are stored in the memory, and the processor processes the instructions, so as to meet different communication requirements.

[0098] Figure 7 A structural diagram of another embodiment of the communication system of the present disclosure is shown. The communication system includes a communication device 710 and a base station 720. The communication device 710 has been described in detail in the above embodiments, and will not be further elaborated here. The base station 720 is configured to send its own state information to the communication device, for example, the current communication state or non-communication state.

[0099] In some embodiments, the base station 720 also broadcasts indication information to the communication device 710, which includes whether the communication device needs to provide a communication link for the base station and the receiver, so that the communication device 710 determines whether to switch to the reciprocal communication state or the mutual interference communication state.

[0100] In some embodiments, if there are multiple communication devices 710 in the environment, the base station 720 should be able to send indication information to each communication device 710 and provide an incentive source through the device 710.

[0101] In some embodiments, the communication device 710 is a backscatter device. Since the backscatter device has low cost and low implementation complexity, it is easy to implement and promote the system, therefore, in the future 6G, a large number of backscatter devices can be deployed in the environment to improve the spectrum utilization and resource utilization.

[0102] In another embodiment of the present disclosure, the communication system, as shown in Figure 4 , includes a base station 410, a receiver 420, and a communication device 430, wherein the base station 410 is the same as the base station 720 in Figure 7 , and the communication device 430 is the same as the communication device 710 in Figure 7 .

[0103] The receiver 420 is configured to receive the information sent by the communication device 430 and the base station 410.

[0104] In some embodiments, the receiver 420 periodically reports the signal strength of the direct link signal received by the receiver. If the signal transmitted by the base station 410 to the receiver 420 through the direct link is weak, the base station 410 broadcasts in the broadcast channel that the communication device 430 needs to provide a multipath indication. The communication device 430 can select the intelligent reflection state and the reciprocal communication state according to whether it has data transmission itself and the transmission power and modulation mode of the base station 410.

[0105] The communication system of the above embodiment can meet different communication requirements.

[0106] In some embodiments, a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the methods of the above embodiments. Those skilled in the art should clearly understand that the embodiments of the present disclosure can be provided as a method, device, or computer program product. Therefore, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) having computer usable program code embodied therein.

[0107] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as a combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus generate a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0108] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0110] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0111] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A state switching method, executed by a communication device, comprising: Obtain base station status information; as well as Based on the data transmission requirements of the communication device and the base station status information, the state of the communication device is switched. The state of the communication device includes one of three states: backscatter communication state, energy harvesting state, and active communication state. When the base station is in a communication state and the communication device has a data transmission requirement, the communication device is in a backscatter communication state. The backscatter communication state includes a first communication state and a second communication state. The device receives indication information sent by the base station and, based on the indication information, controls the communication device to be in either the first communication state or a second communication state different from the first communication state. Specifically, when the base station's transmit power is greater than a power threshold and the modulation method is frequency modulation or amplitude modulation, the indication information indicates that a communication link needs to be provided between the base station and the receiver through the communication device. When the base station's transmit power is less than or equal to the power threshold, or the modulation method is phase modulation, the indication information indicates that a communication link does not need to be provided between the base station and the receiver through the communication device.

2. The state switching method according to claim 1, wherein, When the communication device is in a first communication state, the communication device sends first information to the receiver through a backscatter link and forwards second information sent by the base station to the receiver.

3. The state switching method according to claim 1 or 2, wherein, The step of switching the state of the communication device according to the data transmission requirements of the communication device and the base station status information includes: When the base station is in a communication state and the communication device has no data transmission requirement, the communication device is in an energy harvesting state.

4. The state switching method according to claim 3, wherein, When the communication device is in the energy harvesting state, the modulation transmitter of the communication device is in the off state.

5. The state switching method according to claim 1 or 2, wherein, The step of switching the state of the communication device according to the data transmission requirements of the communication device and the base station status information includes: When the base station is in a non-communication state, and the communication device has a data transmission requirement, the communication device is in an active communication state.

6. The state switching method according to claim 5, wherein, When the communication device is in an active communication state, it uses the collected energy to send signals to the receiver.

7. A communication device, comprising: The first processing module is configured to acquire base station status information; as well as The second processing module is configured to switch the state of the communication device according to the data transmission requirements of the communication device and the status information of the base station. The state of the communication device includes one of the following: backscatter communication state, energy harvesting state, and active communication state. When the base station is in the communication state and the communication device has data transmission requirements, the communication device is in the backscatter communication state. The backscatter communication state includes a first communication state and a second communication state. The module receives indication information sent by the base station and controls the communication device to be in the first communication state or a second communication state different from the first communication state according to the indication information. When the base station's transmit power is greater than a power threshold and the modulation method is frequency modulation or amplitude modulation, the indication information indicates that a communication link needs to be provided between the base station and the receiver through the communication device. When the base station's transmit power is less than or equal to the power threshold, or the modulation method is phase modulation, the indication information indicates that a communication link does not need to be provided between the base station and the receiver through the communication device.

8. The communication device according to claim 7, wherein, The second processing module is also configured to control the communication device to be in an energy harvesting state when the base station is in a communication state and the communication device has no data transmission requirement.

9. The communication device according to claim 7 or 8, wherein, The second processing module is also configured to control the communication device to be in an active communication state when the base station is in a non-communication state and the communication device has a data transmission requirement.

10. A communication device, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the state switching method as described in any one of claims 1 to 6 based on instructions stored in the memory.

11. A communication system, comprising: The communication device according to claim 10; as well as The base station is configured to send base station status information to the communication device.

12. The communication system according to claim 11, further comprising: The receiver is configured to receive information transmitted by the communication device and the base station.

13. The communication system according to claim 11 or 12, wherein, The communication device is a backscatter communication device.

14. A non-transitory computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the state switching method as described in any one of claims 1 to 6.

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