Communication method based on spectrum sharing system and spectrum sharing system

Abstract

The embodiment of the present disclosure provides a communication method based on a spectrum sharing system and the spectrum sharing system, and relates to the technical field of wireless communication. The spectrum sharing system comprises a primary system, a secondary system and one or more backscatter communication devices, the secondary system is connected with the backscatter communication devices; the communication method comprises the following steps: in the case that the secondary system needs to communicate by using a shared frequency band, the secondary system detects the occupation state of the shared frequency band of the primary system by controlling the one or more backscatter communication devices; if the occupation state of the shared frequency band of the primary system is unoccupied, the secondary system communicates by using the shared frequency band. The communication method can assist spectrum sensing through the one or more backscatter communication devices, improve the detection accuracy of the spectrum usage of the primary system, and further improve the spectrum utilization.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication technology, and more specifically, to a communication method, a spectrum sharing system, an electronic device, and a computer-readable storage medium based on a spectrum sharing system. Background Technology

[0002] Cognitive radio (CR) is a wireless communication technology that promises to alleviate the shortage of wireless spectrum resources and low spectrum utilization. It allows secondary systems to use spectrum holes that are not currently used by the primary system, thereby improving spectrum utilization. Spectrum sensing is a key technology of cognitive radio. Its main function is to detect spectrum holes available for use by secondary systems, while simultaneously monitoring the signal activity of the primary system, ensuring that secondary systems can quickly withdraw from the corresponding frequency band when the primary system uses the spectrum again.

[0003] Currently, the spectrum sensing strategy uses single-node sensing. Due to the uncertainty of the wireless environment, there is a tendency for hidden terminals and exposed terminals to occur, resulting in low accuracy of the spectrum usage of the main system detected by the secondary system.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] This disclosure provides a communication method, a spectrum sharing system, an electronic device, and a computer-readable storage medium based on a spectrum sharing system, which solves the problem that the accuracy of the spectrum usage of the main system detected by the secondary system is low due to the use of single-node sensing.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to one aspect of this disclosure, a communication method based on a spectrum sharing system is provided. The spectrum sharing system includes: a main system, a secondary system, and one or more backscatter communication devices, wherein the secondary system is connected to the backscatter communication devices. The method includes: when the secondary system needs to use a shared frequency band for communication, the secondary system controls the one or more backscatter communication devices to detect the shared frequency band occupancy status of the main system; if the shared frequency band occupancy status of the main system is unoccupied, the secondary system uses the shared frequency band for communication.

[0008] In some embodiments of this disclosure, when the secondary system needs to use a shared frequency band for communication, the secondary system detects the shared frequency band occupancy status of the primary system by controlling one or more backscatter communication devices. This includes: when the secondary system needs to use the shared frequency band for communication, the secondary system uses a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the primary system and obtains the detection time; if the secondary system does not detect the shared frequency band occupancy status of the primary system, or the detection time is greater than a preset time threshold, the secondary system controls a target number of backscatter communication devices among the one or more backscatter communication devices to be turned on, and detects the shared frequency band occupancy status of the primary system through the turned-on backscatter communication devices.

[0009] In some embodiments of this disclosure, before the secondary system controls the activation of the backscatter communication devices for the number of targets in the one or more backscatter communication devices, the method further includes: the secondary system acquiring detection data obtained by using the preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system; and the secondary system calculating the number of targets based on the detection data and the spectrum sensing gain value of each of the backscatter communication devices.

[0010] In some embodiments of this disclosure, after the subsystem controls the activation of the number of backscatter communication devices in the one or more backscatter communication devices, the method further includes: the subsystem adjusting the electromagnetic unit parameters of the activated backscatter communication devices to control the information of the radio frequency reflection signal of the activated backscatter communication devices.

[0011] In some embodiments of this disclosure, the method further includes: when the secondary system is communicating, the secondary system calculates a first statistical channel information between the secondary system and the activated backscatter communication device and a second statistical channel information between the main system and the activated backscatter communication device based on the radio frequency received signal of the activated backscatter communication device; the secondary system adjusts the electromagnetic unit parameters of the activated backscatter communication device based on the first statistical channel information and the second statistical channel information.

[0012] In some embodiments of this disclosure, the method further includes: the subsystem predicting the shared frequency band occupancy status of the main system based on the parameter information of the main system stored in the backscatter communication device; wherein the parameter information of the main system includes at least one of the following: the communication time of the main system, the bandwidth occupancy information of the main system, and the amount of data when the main system communicates.

[0013] In some embodiments of this disclosure, the backscatter communication device has a self-starting function for automatically starting when the subsystem does not meet the minimum signal-to-noise ratio sensing requirement; and the method further includes: when the subsystem meets the minimum signal-to-noise ratio sensing requirement, the subsystem controls the self-started backscatter device to shut down.

[0014] In some embodiments of this disclosure, the number of the one or more backscatter communication devices is calculated based on the spectral sensing gain value of each of the backscatter communication devices, the energy detection threshold of the subsystem, and a preset noise power.

[0015] In some embodiments of this disclosure, the one or more backscatter communication devices are deployed based on the location information of the subsystem.

[0016] In some embodiments of this disclosure, the operating frequency range of the excitation source of the secondary system is the same as that of the excitation source of the primary system; and the excitation source of the reverse device communication device is matched with the backscatter antenna of the reverse device communication device.

[0017] According to another aspect of this disclosure, a spectrum sharing system is provided, the spectrum sharing system comprising: a main system, a secondary system, and one or more backscatter communication devices, the secondary system being connected to the backscatter communication devices; wherein, the secondary system is configured to: when the secondary system needs to use a shared frequency band for communication, detect the shared frequency band occupancy status of the main system by controlling the one or more backscatter communication devices; if the shared frequency band occupancy status of the main system is unoccupied, then use the shared frequency band for communication.

[0018] According to another aspect of this disclosure, an electronic device is provided, comprising: one or more processors; and a storage device configured to store one or more programs, which, when executed by the one or more processors, cause the one or more processors to implement the communication method based on a spectrum sharing system as described in the above embodiments.

[0019] According to another aspect of this disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the communication method based on a spectrum sharing system as described in the above embodiments.

[0020] This disclosure provides a communication method based on a spectrum sharing system. The spectrum sharing system includes a primary system, a secondary system, and a backscatter communication device. When the secondary system needs to use a shared frequency band for communication, it can detect the shared frequency band usage of the primary system by controlling the backscatter communication device. When the primary system does not use the shared spectrum, the secondary system can use the shared frequency band for communication. Therefore, this communication method can assist spectrum sensing through one or more backscatter communication devices, solving the problem of low accuracy in detecting the primary system's spectrum usage caused by single-node sensing, improving the detection accuracy of the primary system's spectrum usage, and thus improving spectrum utilization.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure, and are not intended to unduly limit this disclosure.

[0023] Figure 1 An example diagram of an existing communication method based on cognitive radio technology is shown;

[0024] Figure 2 An example diagram of a communication method based on a spectrum sharing system according to an embodiment of this disclosure is shown;

[0025] Figure 3 A flowchart illustrating a communication method based on a spectrum sharing system according to an embodiment of this disclosure is shown.

[0026] Figure 4 A flowchart illustrating the detection of shared frequency band occupancy status of the main system according to an embodiment of this disclosure is shown;

[0027] Figure 5 A flowchart of a communication method based on a spectrum sharing system according to yet another embodiment of this disclosure is shown;

[0028] Figure 6 A structural block diagram of an electronic device according to an embodiment of the present disclosure is shown. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0031] It should be noted that the ordinal numbers such as "first" and "second" mentioned in the embodiments of this disclosure are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects. Furthermore, the descriptions of "first" and "second" do not limit the objects to necessarily being different.

[0032] Figure 1 An example diagram of a communication method based on cognitive radio technology is shown. In cognitive radio technology, the primary and secondary systems communicate by sharing the spectrum. Figure 1 In the main system, there are a main system transmitter 110 and a receiver 120. The main system transmitter 110 communicates with the receiver 120 using a shared frequency band. The secondary system includes a secondary system transmitter 130 and a receiver 120. When the main system transmitter 110 does not use the shared frequency band, the secondary system transmitter 130 can use the shared frequency band to communicate with the terminal device 120.

[0033] Figure 1 In the process, there is an obstacle 140 between the main system transmitter 110 and the secondary system transmitter 130. If single-node sensing is used, the secondary system transmitter 130 cannot detect the spectrum usage of the main system. That is, when the secondary system needs to communicate, it cannot detect whether the main system is using the shared frequency band for communication, which causes the secondary system transmitter 130 to be unable to communicate with the terminal device 120.

[0034] To address the aforementioned issues, this disclosure provides a communication method and a spectrum sharing system based on a spectrum sharing system. By using one or more backscatter communication devices to assist spectrum sensing, it solves the problem of low accuracy in detecting the spectrum usage of the main system by the secondary system due to single-node sensing, thereby improving the detection accuracy of the spectrum usage of the main system and thus increasing spectrum utilization.

[0035] Figure 2 An example diagram of a communication method based on a spectrum sharing system according to an embodiment of this disclosure is shown. Figure 2In this spectrum sharing system, there are a main system, a secondary system, and backscatter communication equipment. The main system includes a main system transmitter 210 and a receiver 220, and the secondary system includes a secondary system transmitter 230 and a receiver 220. Backscatter communication equipment 240 is deployed between the main system transmitter 210 and the secondary system transmitter 230, and there is an obstacle 250 between the main system transmitter 210 and the secondary system transmitter 230.

[0036] When the secondary system transmitter 230 needs to use the shared frequency band to communicate with the receiver 220, the spectrum sensing results can be enhanced by the backscatter communication device 240, enabling the secondary system transmitter 230 to detect the spectrum usage of the primary system transmitter 210. When the primary system transmitter 210 is not using the shared frequency band, the secondary system transmitter 230 uses the shared frequency band to communicate with the receiver 220; and when the primary system transmitter 210 is using the shared frequency band, the secondary system transmitter 230 remains silent.

[0037] It should be noted that, Figure 2 In the system architecture diagram of the spectrum sharing system shown, the receiver of the main system and the receiver of the secondary system are the same, both being receiver 220. In some embodiments, the receiver of the main system may be different from the receiver of the secondary system; this disclosure does not limit this. Furthermore... Figure 2 The number of backscatter communication devices is exemplary and can be deployed according to actual needs.

[0038] Figure 3 A flowchart of a communication method based on a spectrum sharing system according to an embodiment of the present disclosure is shown. Figure 3 The communication method shown can be applied to Figure 2 The spectrum sharing system shown includes a primary system, a secondary system, and one or more backscatter communication devices.

[0039] like Figure 3 As shown, the communication method based on a spectrum sharing system may specifically include the following steps.

[0040] In step S310, when the secondary system needs to use a shared frequency band for communication, the secondary system detects the shared frequency band occupancy status of the primary system by controlling one or more backscatter communication devices.

[0041] In this embodiment of the disclosure, there are one or more backscatter communication devices, and the subsystem is connected to each backscatter communication device.

[0042] Backscatter communication is a wireless technology that transmits and encodes signals without an active transmitter. Similar to radar, when electromagnetic waves reach the surface of an object, a portion is reflected. The strength of the reflected signal depends on the object's shape, material, and distance. From a radar perspective, each object has a radar cross-section, and the reflected signal is modulated by changing this cross-section. The backscatter transmitter modulates the received radio frequency signal to transmit data without needing to generate its own radio frequency signal.

[0043] In this embodiment of the disclosure, the backscatter communication device includes a receiving unit and a reflecting unit. The receiving unit can receive signals transmitted by the main system transmitter, and the reflecting unit can modulate the received signals and reflect the modulated signals back to the secondary system transmitter.

[0044] In step S310, if the secondary system needs to use a shared frequency band for communication, it can detect the shared frequency band usage of the primary system by controlling one or more backscatter communication devices. Specifically, the secondary system transmitter can control the switching on and off of one or more backscatter communication devices and their electromagnetic unit parameters to detect whether the primary system is using the shared frequency band.

[0045] In some embodiments of this disclosure, one or more backscatter communication devices are deployed based on the location information of the subsystem.

[0046] Specifically, one or more backscatter communication devices can be deployed around the secondary system transmitter to assist the secondary system transmitter in detecting the spectrum usage of the main system. The area around the secondary system transmitter can be within a preset distance, such as 50 meters from the secondary system transmitter.

[0047] In some embodiments of this disclosure, the number of one or more backscatter communication devices is calculated based on the spectrum sensing gain value of each backscatter communication device, the energy detection threshold of the subsystem, and the preset noise power.

[0048] The number of backscatter communication devices is related to the spectrum sensing gain of the backscatter communication devices, the energy detection threshold of the subsystem, and the preset noise power. Specifically, the superimposed signal from all backscatter communication devices needs to reach the minimum energy detection threshold of the subsystem transmitter.

[0049] For example, when no backscatter communication devices are deployed, the secondary system cannot detect the spectrum usage of the primary system. The default background noise setting is -120dBm (i.e., the preset noise power). If the energy detection threshold of the secondary system is -115dBm, and each backscatter communication device can enhance the signal by 3dB (i.e., the spectrum sensing gain value of each backscatter communication device is 3dB), then at least two backscatter communication devices need to be deployed around the transmitter of the secondary system to enhance the spectrum sensing capability of the secondary system.

[0050] In some embodiments of this disclosure, the operating frequency range of the excitation source of the secondary system is the same as that of the excitation source of the primary system; and the excitation source of the reverse device communication device is matched with the backscatter antenna of the reverse device communication device.

[0051] In this embodiment of the disclosure, the operating frequency band range of the excitation source of the secondary system is the same as that of the excitation source of the primary system. That is, both the secondary system and the primary system use a shared frequency band for communication.

[0052] The excitation source of the backscatter communication device is matched with the backscatter antenna, which ensures that the information collected by the backscatter communication device can be transmitted through electromagnetic waves in the environment.

[0053] Step S320: If the shared frequency band of the main system is not occupied, the secondary system uses the shared frequency band for communication.

[0054] In step S320, if the secondary system transmitter detects that the primary system is not using the shared frequency band for communication, then the secondary system can use the shared frequency band for communication; that is, the secondary system transmitter can use the shared frequency band to communicate with the receiver. Conversely, if the secondary system transmitter detects that the primary system is using the shared frequency band, then the secondary system remains silent.

[0055] This disclosure provides a communication method based on a spectrum sharing system. The spectrum sharing system includes a primary system, a secondary system, and a backscatter communication device. When the secondary system needs to use a shared frequency band for communication, it can detect the shared frequency band usage of the primary system by controlling the backscatter communication device. When the primary system does not use the shared spectrum, the secondary system can use the shared frequency band for communication. Therefore, this communication method can assist spectrum sensing through one or more backscatter communication devices, solving the problem of low accuracy in detecting the primary system's spectrum usage caused by single-node sensing, improving the detection accuracy of the primary system's spectrum usage, and thus improving spectrum utilization.

[0056] To facilitate understanding, the following will be combined with the appendix. Figure 4 To be continued Figure 5 The communication method based on a spectrum sharing system according to the embodiments of this disclosure will be described in more detail.

[0057] Figure 4 A flowchart illustrating the detection of shared frequency band occupancy status of the main system according to an embodiment of this disclosure is shown. Figure 4 The diagram illustrates the specific steps a subsystem takes to detect the shared frequency band occupancy status of the main system by controlling one or more backscatter communication devices when the subsystem needs to use a shared frequency band for communication.

[0058] exist Figure 4 In the embodiments, the above Figure 3 Step S310 in the embodiment may further include the following steps.

[0059] Step S311: When the secondary system needs to use a shared frequency band for communication, the secondary system uses a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system and obtain the detection time.

[0060] Step S312: If the secondary system does not detect the shared frequency band occupancy status of the main system, or the detection time is greater than a preset time threshold, the secondary system controls one or more backscatter communication devices to activate the target number of backscatter communication devices, and detects the shared frequency band occupancy status of the main system through the activated backscatter communication devices.

[0061] The preset spectrum sensing algorithm may include at least one of the following: energy detection algorithm, matched filter detection algorithm, and cyclic stationary detection algorithm.

[0062] When the secondary system transmitter needs to communicate with the receiver using a shared frequency band, the secondary system transmitter can use at least one of the energy detection algorithm, matched filter detection algorithm, and cyclic stationary detection algorithm to detect whether the primary system transmitter is communicating with the receiver using a shared frequency band, and obtain the detection time and detection result.

[0063] If the secondary system transmitter fails to detect the shared frequency band occupancy status of the primary system using the preset spectrum sensing algorithm, or if the time required for the secondary system transmitter to detect the shared frequency band occupancy status of the primary system using the preset spectrum sensing algorithm exceeds a preset time threshold, then the secondary system controls the activation of backscatter communication devices for a specified number of targets. This activation of backscatter communication devices assists in detecting whether the primary system transmitter is using the shared frequency band to communicate with the receiver.

[0064] In some embodiments of this disclosure, before the secondary system controls the activation of the backscatter communication devices for the number of targets in one or more backscatter communication devices, the communication method based on the spectrum sharing system may further include: the secondary system acquiring detection data obtained by using a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system; and the secondary system calculating the number of targets based on the detection data and the spectrum sensing gain value of each backscatter communication device.

[0065] If the secondary system transmitter fails to detect the shared frequency band occupancy status of the primary system using the preset spectrum sensing algorithm, or if the time required for the secondary system transmitter to detect the shared frequency band occupancy status of the primary system using the preset spectrum sensing algorithm exceeds a preset time threshold, then the secondary system transmitter can acquire the detection data obtained through the preset spectrum sensing algorithm. Based on the detection data and the spectrum sensing gain value of each backscatter communication device, it can then calculate the number of targets, i.e., the number of backscatter communication devices that need to be activated. The detection data may include the spectrum sensing capability of the secondary system transmitter.

[0066] In this embodiment of the disclosure, if the secondary system transmitter cannot detect the shared frequency band usage of the primary system using a preset spectrum sensing algorithm, or if the detection time exceeds a preset time threshold, the secondary system transmitter can control the activation of a target number of backscatter communication devices. This allows the activated backscatter communication devices to assist in detecting the shared frequency band usage of the primary system. Furthermore, the secondary system transmitter can calculate the number of backscatter communication devices that need to be activated based on the detection data and the spectrum sensing gain value of each backscatter communication device.

[0067] In some embodiments of this disclosure, after detecting the shared frequency band occupancy status of the main system through the activated backscatter communication device, the communication method based on the spectrum sharing system may further include: if the secondary system detects the shared frequency band occupancy status of the main system through a preset spectrum sensing algorithm, the secondary system controls the activated backscatter communication device to turn off; if the time required for the secondary system transmitter to perform detection through the preset spectrum sensing algorithm decreases, the secondary system controls some of the activated backscatter communication devices to turn off; and if the time required for the secondary system transmitter to perform detection through the preset spectrum sensing algorithm increases, the secondary system controls the backscatter communication devices other than the activated backscatter communication devices to turn on.

[0068] In other words, the secondary system transmitter can dynamically control the activation or deactivation of backscatter communication devices. After activating the target number of backscatter communication devices, if the secondary system transmitter detects the shared frequency band occupancy status of the main system through a preset spectrum sensing algorithm, then the secondary system transmitter can control the activated backscatter communication devices to deactivate.

[0069] After activating n1 backscatter communication devices, if the time required for the secondary system transmitter to detect the shared frequency band occupancy status of the main system using a preset spectrum sensing algorithm is reduced, meaning the spectrum sensing capability of the secondary system transmitter is improved, then the secondary system transmitter can control some of the activated backscatter communication devices to shut down. Specifically, based on the improved spectrum sensing capability of the secondary system transmitter and the spectrum gain value of each backscatter communication device, the new target number n2 of backscatter communication devices to be activated can be calculated. Then, the new target number n2 is subtracted from the target number n1 to obtain the number n3 of backscatter communication devices to be shut down. The secondary system transmitter needs to control the shutdown of n3 backscatter communication devices out of the n1 activated backscatter communication devices.

[0070] After activating n1 backscatter communication devices, if the time required for the secondary system transmitter to detect the shared frequency band occupancy status of the main system using a preset spectrum sensing algorithm increases, indicating a decrease in the spectrum sensing capability of the secondary system transmitter, then the secondary system transmitter can control the activation of any previously unactivated backscatter communication devices. Specifically, based on the reduced spectrum sensing capability of the secondary system transmitter and the spectrum gain value of each backscatter communication device, a new target number n4 of backscatter communication devices needs to be activated. Then, the target number n1 is subtracted from the new target number n4 to obtain the number of newly activated backscatter communication devices n5. The secondary system transmitter then needs to control the activation of n5 backscatter communication devices, meaning the secondary system needs to control the activation of a total of n4 backscatter communication devices.

[0071] In this embodiment, the secondary system transmitter can dynamically turn backscatter communication devices on or off based on the detection results of the primary system's shared frequency band usage detected by a preset spectrum sensing algorithm, the detection time required, the detection data (the spectrum sensing capability of the secondary system transmitter), and the spectrum gain value of each backscatter communication device. This ensures that the secondary system transmitter can detect the primary system's shared frequency band usage using the activated backscatter communication devices, and the number of activated backscatter communication devices can be controlled, eliminating the need to activate redundant backscatter communication devices and avoiding resource waste.

[0072] In some embodiments of this disclosure, after the subsystem controls the activation of a target number of backscatter communication devices in one or more backscatter communication devices, the communication method based on the spectrum sharing system may further include: the subsystem adjusting the electromagnetic unit parameters of the activated backscatter communication devices to control the information of the radio frequency reflection signal of the activated backscatter communication devices.

[0073] After the secondary system transmitter activates the backscatter communication devices controlling the number of targets, it can also adjust the electromagnetic unit parameters of these activated backscatter communication devices, such as adjusting the phase or amplitude. This allows adjustment of the signal direction or amplitude reflected by the reflection units of the backscatter communication devices. Since the reflection units of the backscatter communication devices reflect signals to the secondary system, adjusting the signal direction or amplitude reflected by the reflection units enables the secondary system transmitter to better receive the signals reflected by the reflection units, thereby improving the accuracy of the main system's spectrum usage detection.

[0074] In some embodiments of this disclosure, the communication method based on the spectrum sharing system may further include: when the secondary system is communicating, the secondary system calculates a first statistical channel information between the secondary system and the activated backscatter communication device and a second statistical channel information between the primary system and the activated backscatter communication device based on the radio frequency received signal of the activated backscatter communication device; the secondary system adjusts the electromagnetic unit parameters of the activated backscatter communication device based on the first statistical channel information and the second statistical channel information.

[0075] When the secondary system transmitter and receiver communicate using a shared frequency band, the secondary system transmitter can calculate the first statistical channel information between the secondary system transmitter and the activated backscatter communication device, as well as the second statistical channel information between the primary system transmitter and the activated backscatter communication device, based on the radio frequency received signal of the activated backscatter communication device. Then, based on the first and second statistical channel information, the electromagnetic unit parameters of the activated backscatter communication device, such as phase or amplitude, can be adjusted, thereby enhancing the equivalent channel gain between the primary system transmitter and the secondary system transmitter.

[0076] In some embodiments of this disclosure, the communication method based on a spectrum sharing system may further include: the secondary system predicting the shared frequency band occupancy status of the primary system based on parameter information of the primary system stored in the backscatter communication device. The parameter information of the primary system includes at least one of the following: the communication time of the primary system, the occupied bandwidth information of the primary system, and the amount of data transmitted during communication by the primary system.

[0077] In this embodiment, the backscatter communication device has an information collection function. Specifically, during main system communication, the backscatter general term formula merging can record and store the communication time, bandwidth occupied, and amount of communication data during main system communication. Thus, when the secondary system needs to communicate, it can obtain the stored information related to the main system communication from the backscatter communication device and predict the shared frequency band usage of the main system based on the obtained information.

[0078] In some embodiments of this disclosure, the backscatter communication device has a self-starting function for automatically starting when the subsystem does not meet the minimum signal-to-noise ratio (SNR) sensing requirement; and the communication method based on the spectrum sharing system may further include: when the subsystem meets the minimum SNR sensing requirement, the subsystem controls the self-starting backscatter device to shut down.

[0079] The subsystem failing to meet the minimum signal-to-noise ratio (SNR) sensing requirement means that, in the absence of any obstacles between the main system transmitter and the subsystem transmitter, the subsystem transmitter cannot detect the shared frequency band usage of the main system; the subsystem meeting the minimum SNR sensing requirement means that, in the absence of any obstacles between the main system transmitter and the subsystem transmitter, the subsystem transmitter can detect the shared frequency band usage of the main system.

[0080] The backscatter communication device can automatically activate if the subsystem transmitter fails to meet the minimum signal-to-noise ratio (SNR) sensing requirement. When the subsystem transmitter meets the minimum SNR sensing requirement, it can control the automatically activated backscatter communication device to shut down. Specifically, a specified number of backscatter communication devices from one or more devices can be pre-configured to automatically activate if the subsystem transmitter fails to meet the minimum SNR sensing requirement. This specified number can be calculated based on the minimum SNR sensing requirement and the spectral gain value of each backscatter communication device.

[0081] In this embodiment of the disclosure, the backscatter communication device has a self-starting function, so that it can start automatically when the secondary system transmitter cannot normally sense the operation of the main system, so as to assist the secondary system transmitter in detecting the shared spectrum usage of the main system and thus determining whether communication can be carried out.

[0082] The following specific embodiments illustrate the communication method based on a spectrum sharing system provided in this disclosure.

[0083] Figure 5 A flowchart illustrating a communication method based on a spectrum-sharing system according to another embodiment of this disclosure is shown. The spectrum-sharing system includes a main system, a secondary system, and one or more backscatter communication devices. The main system includes a main system transmitter and a main system receiver, and the secondary system includes a secondary system transmitter and a secondary system receiver. The main system receiver and the secondary system receiver can be the same receiver or different receivers. The operating frequency band of the excitation source of the secondary system is the same as that of the excitation source of the main system, i.e., both the secondary system and the main system use a shared frequency band for communication; and the excitation source of the backscatter communication device is matched with the backscatter antenna of the backscatter communication device.

[0084] like Figure 5 As shown, the communication method based on a spectrum sharing system may specifically include the following steps.

[0085] Step S501: Calculate the number k of backscatter communication devices to be deployed based on the spectrum sensing gain value of each backscatter communication device, the energy detection threshold of the subsystem, and the preset noise power. Deploy k backscatter communication devices around the subsystem transmitter, such as within a 50-meter range of the subsystem transmitter.

[0086] In step S502, when the secondary system needs to use a shared frequency band for communication, the secondary system transmitter uses a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the primary system and obtain the detection time. The preset spectrum sensing algorithm may include at least one of the following: an energy detection algorithm, a matched filter detection algorithm, and a cyclic stationary detection algorithm.

[0087] Step S503: If the subsystem transmitter fails to detect the shared frequency band occupancy status of the main system using the preset spectrum sensing algorithm, or if the detection time is longer than the preset time threshold, then the spectrum sensing capability of the subsystem is obtained. Based on the spectrum sensing capability of the subsystem and the spectrum sensing gain value of each backscatter communication device, the number of targets m is calculated, which is the number of backscatter communication devices that need to be activated.

[0088] In step S504, the subsystem transmitter controls m of the k backscatter communication devices to turn on, and detects the shared frequency band occupancy status of the main system through the m backscatter communication devices that are turned on.

[0089] Step S505: If the shared frequency band of the main system is not occupied, the transmitter of the secondary system uses the shared frequency band to communicate with the receiver of the secondary system.

[0090] In step S506, when the subsystem is communicating, the subsystem transmitter calculates the first statistical channel information between the subsystem transmitter and the m activated backscatter communication devices and the second statistical channel information between the main system transmitter and the m activated backscatter communication devices based on the radio frequency received signals of the m activated backscatter communication devices. Based on the first statistical channel information and the second statistical channel information, the electromagnetic unit parameters of the m activated backscatter communication devices are adjusted.

[0091] Step S507: If the shared frequency band of the main system is occupied, the secondary system remains silent.

[0092] It should be noted that after step S502, if the secondary system transmitter detects the shared frequency band occupancy status of the primary system using a preset spectrum sensing algorithm, or if the detection time is less than or equal to a preset time threshold, and if the shared frequency band occupancy status of the primary system is unoccupied, the secondary system transmitter communicates with the secondary system receiver using the shared frequency band. If the shared frequency band occupancy status of the primary system is occupied, the secondary system remains silent. Furthermore, after the secondary system transmitter controls the activation of m backscatter communication devices out of the k backscatter communication devices in step S504, the secondary system transmitter can control the electromagnetic unit parameters of the activated m backscatter communication devices, thereby adjusting the signal direction or signal amplitude reflected by the reflection units of the activated m backscatter communication devices. Moreover, the secondary system transmitter can dynamically adjust the activation or deactivation of the backscatter communication devices based on changes in its own spectrum sensing capability.

[0093] Furthermore, the backscatter communication device possesses information collection capabilities. Specifically, during primary system communication, the backscatter general term formula merging can record and store the communication time, bandwidth usage, and data volume of the primary system. Thus, when the secondary system needs to communicate, it can retrieve the stored information related to the primary system's communication from the backscatter communication device and predict the shared frequency band usage of the primary system based on the acquired information.

[0094] Furthermore, the backscatter communication equipment has a self-starting function. Specifically, the backscatter communication equipment can automatically start if the subsystem transmitter fails to meet the minimum signal-to-noise ratio (SNR) sensing requirement. When the subsystem transmitter meets the minimum SNR sensing requirement, it can control the automatically started backscatter communication equipment to shut down. Specifically, s out of k backscatter communication equipment can be pre-configured to automatically start if the subsystem transmitter fails to meet the minimum SNR sensing requirement. The value of s can be calculated based on the minimum SNR sensing requirement and the spectral gain value of each backscatter communication equipment.

[0095] As can be seen, the communication method based on the spectrum sharing system in this embodiment can assist spectrum sensing with one or more backscatter communication devices, solve the problem of low accuracy of the main system spectrum usage detected by the secondary system due to the use of single-node sensing, improve the detection accuracy of the main system spectrum usage, and thus improve spectrum utilization.

[0096] Based on the same inventive concept, this disclosure provides a spectrum sharing system, as described in the following embodiments.

[0097] This disclosure provides a spectrum sharing system, which may include a main system, a secondary system, and one or more backscatter communication devices, wherein the secondary system is connected to the backscatter communication devices.

[0098] The secondary system can be used to: detect the shared frequency band occupancy status of the main system by controlling one or more backscatter communication devices when the secondary system needs to use a shared frequency band for communication; if the shared frequency band occupancy status of the main system is unoccupied, then the shared frequency band is used for communication.

[0099] In some embodiments of this disclosure, the secondary system can also be used to: when the secondary system needs to use a shared frequency band for communication, use a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system and obtain the detection time; if the secondary system does not detect the shared frequency band occupancy status of the main system, or the detection time is greater than a preset time threshold, control one or more backscatter communication devices of the target number to turn on, and detect the shared frequency band occupancy status of the main system through the turned-on backscatter communication devices.

[0100] In some embodiments of this disclosure, the subsystem may also be used to: acquire detection data obtained by using a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system; and calculate the number of targets based on the detection data and the spectrum sensing gain value of each backscatter communication device.

[0101] In some embodiments of this disclosure, the subsystem can also be used to: adjust the electromagnetic unit parameters of an activated backscatter communication device to control the information of the radio frequency reflection signal of the activated backscatter communication device.

[0102] In some embodiments of this disclosure, the subsystem may also be used to: calculate, when the subsystem is communicating, a first statistical channel information between the subsystem and the activated backscatter communication device and a second statistical channel information between the main system and the activated backscatter communication device based on the radio frequency received signal of the activated backscatter communication device; and adjust the electromagnetic unit parameters of the activated backscatter communication device based on the first statistical channel information and the second statistical channel information.

[0103] In some embodiments of this disclosure, the subsystem can also be used to: predict the shared frequency band occupancy status of the main system based on the parameter information of the main system stored in the backscatter communication device; wherein the parameter information of the main system includes at least one of the following: the communication time of the main system, the bandwidth occupied by the main system, and the amount of data when the main system communicates.

[0104] In some embodiments of this disclosure, the backscatter communication device has a self-starting function for automatically starting when the subsystem does not meet the minimum signal-to-noise ratio sensing requirement; and the subsystem can also be used to control the self-starting backscatter device to shut down when the subsystem meets the minimum signal-to-noise ratio sensing requirement.

[0105] In some embodiments of this disclosure, the number of one or more backscatter communication devices is calculated based on the spectrum sensing gain value of each backscatter communication device, the energy detection threshold of the subsystem, and the preset noise power.

[0106] In some embodiments of this disclosure, one or more backscatter communication devices are deployed based on the location information of the subsystem.

[0107] In some embodiments of this disclosure, the operating frequency range of the excitation source of the backscatter communication device is the same as that of the excitation source of the main system; and the excitation source of the backscatter communication device is matched with the backscatter antenna of the backscatter communication device.

[0108] Since the principle of solving the problem in this spectrum sharing system embodiment is similar to that in the above method embodiment, the implementation of this spectrum sharing system embodiment can be referred to in the above method embodiment, and repeated details will not be repeated.

[0109] Figure 6 A structural block diagram of an electronic device according to an embodiment of this disclosure is shown. It should be noted that... Figure 6 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.

[0110] like Figure 6 As shown, the electronic device 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage section 608 into a random access memory (RAM) 603. The RAM 603 also stores various programs and data required for the operation of the electronic device 600. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0111] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0112] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs the functions defined above in the system of this disclosure.

[0113] It should be noted that the computer-readable medium disclosed herein may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, terminal device, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, terminal device, or device. In this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, terminal device, or apparatus. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0114] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0115] The units described in the embodiments of this disclosure can be implemented in software or hardware. The described units can also be housed in a processor; for example, a processor can be described as including a sending unit, an acquisition unit, a determining unit, and a first processing unit. The names of these units do not necessarily limit the specific unit; for example, a sending unit can also be described as "a unit that sends an image acquisition request to a connected server."

[0116] In another aspect, this disclosure also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable storage medium carries one or more programs that, when executed by the electronic device, cause the electronic device to perform the methods described in the following embodiments. For example, the electronic device may perform... Figure 3 The steps shown.

[0117] According to one aspect of this disclosure, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in various optional implementations of the above embodiments.

[0118] It should be understood that any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0119] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0120] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A communication method based on a spectrum sharing system, characterized in that, The spectrum sharing system includes: a main system, a secondary system, and one or more backscatter communication devices, wherein the secondary system is connected to the backscatter communication devices; the method includes: When the secondary system needs to use a shared frequency band for communication, the secondary system uses a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system and obtain the detection time required. If the secondary system does not detect the shared frequency band occupancy status of the main system, or if the detection time is greater than a preset time threshold, the secondary system controls the backscatter communication devices of the target number among the one or more backscatter communication devices to be turned on, and detects the shared frequency band occupancy status of the main system through the turned-on backscatter communication devices. If the shared frequency band of the main system is not occupied, the secondary system uses the shared frequency band for communication. Furthermore, after the subsystem controls the activation of the number of backscatter communication devices among the one or more backscatter communication devices, the method further includes: the subsystem adjusting the electromagnetic unit parameters of the activated backscatter communication device to control the information of the radio frequency reflection signal of the activated backscatter communication device.

2. The method according to claim 1, characterized in that, Before the secondary system controls the activation of the backscatter communication devices for the number of targets in the one or more backscatter communication devices, the method further includes: The secondary system acquires detection data obtained by using the preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system. The subsystem calculates the number of targets based on the detection data and the spectral sensing gain values ​​of each of the backscatter communication devices.

3. The method according to claim 1, characterized in that, The method further includes: When the secondary system communicates, it calculates a first statistical channel information between the secondary system and the activated backscatter communication device, and a second statistical channel information between the main system and the activated backscatter communication device, based on the radio frequency received signal of the activated backscatter communication device. The subsystem adjusts the electromagnetic unit parameters of the activated backscatter communication device based on the first statistical channel information and the second statistical channel information.

4. The method according to claim 1, characterized in that, The method further includes: The secondary system predicts the shared frequency band occupancy status of the primary system based on the parameter information of the primary system stored in the backscatter communication device; wherein, the parameter information of the primary system includes at least one of the following: the communication time of the primary system, the bandwidth occupied by the primary system, and the amount of data when the primary system communicates.

5. The method according to claim 1, characterized in that, The backscatter communication device has a self-starting function, which is used to automatically start when the subsystem does not meet the minimum signal-to-noise ratio sensing requirement. Furthermore, the method further includes: when the subsystem meets the minimum signal-to-noise ratio sensing requirement, the subsystem controls the self-starting backscatter communication device to shut down.

6. The method according to any one of claims 1 to 5, characterized in that, The number of the one or more backscatter communication devices is calculated based on the spectral sensing gain value of each of the backscatter communication devices, the energy detection threshold of the subsystem, and the noise power.

7. The method according to any one of claims 1 to 5, characterized in that, The one or more backscatter communication devices are deployed based on the location information of the subsystem.

8. The method according to any one of claims 1 to 5, characterized in that, The operating frequency range of the excitation source of the secondary system is the same as that of the excitation source of the main system; and the excitation source of the backscatter communication device is matched with the backscatter antenna of the backscatter communication device.

9. A spectrum sharing system, characterized in that, The spectrum sharing system includes: a main system, a secondary system, and one or more backscatter communication devices, wherein the secondary system is connected to the backscatter communication devices; The subsystem is configured to: when the subsystem needs to use a shared frequency band for communication, employ a preset spectrum sensing algorithm to detect the shared frequency band occupancy status of the main system and obtain the detection time; if the subsystem does not detect the shared frequency band occupancy status of the main system, or if the detection time exceeds a preset time threshold, then the subsystem controls the backscatter communication devices of the target number among the one or more backscatter communication devices to be activated, and detects the shared frequency band occupancy status of the main system through the activated backscatter communication devices; if the shared frequency band occupancy status of the main system is unoccupied, then communication is performed using the shared frequency band; Furthermore, the subsystem is also used to: adjust the electromagnetic unit parameters of the activated backscatter communication device to control the information of the radio frequency reflection signal of the activated backscatter communication device.

10. An electronic device, characterized in that, include: One or more processors; A storage device configured to store one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the method as described in any one of claims 1 to 8.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 8.

Images