Communication method, base station and backscattering Internet of Things device based on frequency division duplex

Abstract

The present disclosure provides a communication method, base station and backscattering Internet of Things device based on frequency division duplex, which relates to the field of communication technology. The specific method is as follows: a downlink subcarrier signal is sent to a backscattering Internet of Things device. After the backscattering Internet of Things device receives the downlink subcarrier signal, the downlink subcarrier signal is modulated, the frequency of the downlink subcarrier signal is shifted to the frequency division duplex uplink frequency band, and the modulated first uplink subcarrier signal is obtained, and the first uplink subcarrier signal is received through the frequency division duplex uplink frequency band, and resources for demodulating the first uplink subcarrier signal are scheduled. In the above manner, the backscattering Internet of Things device moves the frequency band of the returned first uplink subcarrier signal to the frequency division duplex uplink frequency band in the cellular network, and can directly reuse the transceiver of the base station without occupying additional spectrum, thereby improving spectrum efficiency.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, a base station and a backscattering Internet of Things device based on frequency division duplex. Background Art

[0002] Backscatter communication technology has the characteristics of simple equipment, low energy consumption, and no battery required. The cellular network signal is continuous, has a wide coverage, and is widely present in the environment. Using the cellular network signal as the excitation signal of the backscatter device, the two can be integrated and communicated symbiotically to improve spectrum utilization.

[0003] The base station downlink signal is usually used as the excitation signal of the reverse IoT device, and the reverse IoT device can directly reflect it, that is, transmit the backscatter information on the same subcarrier, but this solution requires the deployment of a new backscatter receiver and interferes with other signals. In the prior art, the reverse IoT device can also shift the frequency of the returned backscatter signal to a clean spectrum to reduce interference with other signals, but this solution requires additional spectrum occupation and reduces spectrum efficiency.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The present disclosure provides a communication, device, electronic device and storage medium based on frequency division duplex, which at least to a certain extent overcomes the problems of additional spectrum occupation and low spectrum efficiency in related technologies.

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

[0007] In a first aspect, an embodiment of the present disclosure provides a communication method based on frequency division duplexing, which is applied to a base station, and the method includes:

[0008] Sending a downlink subcarrier signal to a backscattering IoT device so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device;

[0009] The first uplink subcarrier signal is received in the frequency division duplex uplink frequency band, and resources for demodulating the first uplink subcarrier signal are scheduled.

[0010] In one embodiment of the present disclosure, the method further includes:

[0011] Determine a signal demodulation resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device; the signal demodulation resource scheduling method includes: scheduling a signal demodulation resource for demodulating a first uplink subcarrier signal returned by the backscattering Internet of Things device in a current time-frequency resource; or scheduling a signal demodulation resource for demodulating a first uplink subcarrier signal returned by the backscattering Internet of Things device in a current time-frequency resource and a second uplink subcarrier signal returned by the terminal device;

[0012] Sending a downlink subcarrier signal to a terminal device and a backscattering IoT device through the downlink subcarrier, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal, and enables the terminal device to receive the downlink subcarrier signal and return a second uplink subcarrier signal;

[0013] In the frequency division duplex uplink frequency band, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier, and the first uplink subcarrier signal is demodulated according to the signal demodulation resource scheduling method, or the first uplink subcarrier signal and the second uplink subcarrier signal are demodulated.

[0014] In one embodiment of the present disclosure, the method of determining a signal demodulation resource scheduling mode of an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device includes:

[0015] Obtaining a working cycle of the backscattering IoT device within a preset time period, and determining a working time ratio of the backscattering IoT device; the working time ratio is a ratio of the working time of the backscattering IoT device in a working cycle to the total time of a working cycle;

[0016] If the working duration ratio is less than a preset working duration threshold, scheduling a signal demodulation resource for demodulating the first uplink subcarrier signal in the current time-frequency resource;

[0017] If the working duration ratio is greater than or equal to the preset working duration threshold, signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resources are scheduled.

[0018] In one embodiment of the present disclosure, the method further includes:

[0019] Determine a carrier resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device; the carrier resource scheduling method includes: a first carrier resource scheduling method for scheduling the uplink subcarrier to carry a first uplink subcarrier signal returned by the backscattering Internet of Things device in a current time-frequency resource, and a second carrier resource scheduling method for scheduling the uplink subcarrier to carry a first uplink subcarrier signal returned by the backscattering Internet of Things device and a second uplink subcarrier signal returned by the terminal device in a current time-frequency resource;

[0020] Sending a downlink subcarrier signal to a terminal device and a backscattering IoT device through the downlink subcarrier, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal, and enables the terminal device to receive the downlink subcarrier signal and return a second uplink subcarrier signal;

[0021] If the carrier resource scheduling mode is the first carrier resource scheduling mode, receiving the first uplink subcarrier signal through the uplink subcarrier in the frequency division duplex uplink frequency band;

[0022] If the carrier resource scheduling mode is the second carrier resource scheduling mode, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier in the frequency division duplex uplink frequency band.

[0023] In one embodiment of the present disclosure, the carrier resource scheduling method of determining an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device includes:

[0024] Obtaining a working cycle of the backscattering IoT device within a preset time period, and determining a working time ratio of the backscattering IoT device; the working time ratio is a ratio of the working time of the backscattering IoT device in a working cycle to the total time of a working cycle;

[0025] If the working duration ratio is less than a preset working duration threshold, scheduling the uplink subcarrier to carry the first uplink subcarrier signal in the current time-frequency;

[0026] If the working duration ratio is greater than or equal to the preset working duration threshold, then in the current time-frequency, the uplink subcarrier is scheduled to carry the first uplink subcarrier signal and the second uplink subcarrier signal.

[0027] In one embodiment of the present disclosure, the step of obtaining the working cycle of the backscattering IoT device within a preset time period includes:

[0028] configuring the working cycle of the backscattering IoT device to obtain the working cycle of the backscattering IoT device within a preset time period; or,

[0029] Send instruction information to the backscattering Internet of Things device to enable the backscattering Internet of Things device to upload a working cycle within a preset time period.

[0030] In one embodiment of the present disclosure, the preset working time threshold is pre-set according to the corresponding number of users and traffic density in the base station service area.

[0031] In a second aspect, an embodiment of the present disclosure provides a communication method based on frequency division duplex, which is applied to a backscattering Internet of Things device, and the method includes:

[0032] receiving a downlink subcarrier signal sent by a base station;

[0033] Modulating the downlink subcarrier signal, shifting the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtaining a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device;

[0034] The first uplink subcarrier signal is returned to the base station in the frequency division duplex uplink frequency band, so that the base station schedules resources for demodulating the first uplink subcarrier signal.

[0035] In one embodiment of the present disclosure, the method further includes:

[0036] receiving a downlink subcarrier signal sent by a base station;

[0037] Modulating the downlink subcarrier signal, shifting the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtaining a modulated first uplink subcarrier signal;

[0038] The first uplink subcarrier signal is returned to the base station in the frequency division duplex uplink frequency band, so that the base station demodulates the first uplink subcarrier signal according to the signal demodulation resource scheduling method corresponding to the uplink subcarrier, or demodulates the first uplink subcarrier signal and the second uplink subcarrier signal; the signal demodulation resource scheduling method includes: scheduling signal demodulation resources for demodulating the first uplink subcarrier signal returned by the backscattering Internet of Things device in the current time-frequency resources; or scheduling signal demodulation resources for demodulating the first uplink subcarrier signal returned by the backscattering Internet of Things device in the current time-frequency resources and the second uplink subcarrier signal returned by the terminal device; the second uplink subcarrier signal is an uplink subcarrier signal returned by the terminal device after receiving the downlink subcarrier signal.

[0039] In one embodiment of the present disclosure, before receiving a downlink subcarrier signal sent by a base station, the method further includes:

[0040] Receive indication information sent by a base station, and upload a working cycle within a preset time period, so that the base station determines the working time ratio of the backscattering Internet of Things device according to the working cycle of the backscattering Internet of Things device within the preset time period; the working time ratio is the ratio of the working time of the backscattering Internet of Things device in a working cycle to the total time of a working cycle; if the working time ratio is less than the preset working time threshold, schedule the signal demodulation resources for demodulating the first uplink subcarrier signal in the current time-frequency resource; if the working time ratio is greater than or equal to the preset working time threshold, schedule the signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resource.

[0041] In one embodiment of the present disclosure, the method further includes:

[0042] receiving a downlink subcarrier signal sent by a base station;

[0043] Modulating the downlink subcarrier signal, shifting the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtaining a modulated first uplink subcarrier signal;

[0044] The first uplink subcarrier signal is returned to the base station in the frequency division duplex uplink frequency band, so that the base station demodulates the first uplink subcarrier signal according to the carrier resource scheduling method corresponding to the uplink subcarrier, or demodulates the first uplink subcarrier signal and the second uplink subcarrier signal; wherein the carrier resource scheduling method includes: a first carrier resource scheduling method of scheduling the uplink subcarrier to carry the first uplink subcarrier signal returned by the backscattering Internet of Things device in the current time-frequency resource, and a second carrier resource scheduling method of scheduling the uplink subcarrier to carry the first uplink subcarrier signal returned by the backscattering Internet of Things device and the second uplink subcarrier signal returned by the terminal device in the current time-frequency resource; the second uplink subcarrier signal is an uplink subcarrier signal returned by the terminal device after receiving the downlink subcarrier signal.

[0045] In one embodiment of the present disclosure, before receiving a downlink subcarrier signal sent by a base station, the method further includes:

[0046] Receive indication information sent by a base station, and upload a working cycle within a preset time period, so that the base station determines the working time ratio of the backscattering Internet of Things device according to the working cycle of the backscattering Internet of Things device within the preset time period; the working time ratio is the ratio of the working time of the backscattering Internet of Things device in a working cycle to the total time of a working cycle; if the working time ratio is less than the preset working time threshold, then in the current time frequency, schedule the uplink subcarrier to carry the first uplink subcarrier signal; if the working time ratio is greater than or equal to the preset working time threshold, then in the current time frequency, schedule the uplink subcarrier to carry the first uplink subcarrier signal and the second uplink subcarrier signal.

[0047] In a third aspect, an embodiment of the present disclosure provides a base station, including: a memory, a frequency division duplex transceiver, and a processor;

[0048] The memory is used to store computer programs;

[0049] a frequency division duplex transceiver for transmitting and receiving data under the control of the processor;

[0050] The processor is configured to read the computer program in the memory and perform the following operations:

[0051] Sending a downlink subcarrier signal to a backscattering IoT device so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device;

[0052] The first uplink subcarrier signal is received in the frequency division duplex uplink frequency band, and resources for demodulating the first uplink subcarrier signal are scheduled.

[0053] In a fourth aspect, an embodiment of the present disclosure provides a backscattering Internet of Things device, including an antenna and a signal modulation module;

[0054] The antenna is used to receive a downlink subcarrier signal sent by a base station and return a first uplink subcarrier signal to the base station;

[0055] The signal modulation module is used to modulate the downlink subcarrier signal, shift the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtain a modulated first uplink subcarrier signal.

[0056] In a fifth aspect, an embodiment of the present disclosure provides a communication device based on frequency division duplexing, the device comprising:

[0057] A sending unit, configured to send a downlink subcarrier signal to a backscattering IoT device, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device;

[0058] The scheduling unit is used to receive the first uplink subcarrier signal in the frequency division duplex uplink frequency band, and schedule resources for demodulating the first uplink subcarrier signal.

[0059] In one embodiment of the present disclosure, the scheduling unit is further configured to:

[0060] Determine a resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device; the resource scheduling method includes: scheduling resources for demodulating a first uplink subcarrier signal returned by the backscattering Internet of Things device in a current time-frequency resource; or, scheduling resources for demodulating a first uplink subcarrier signal returned by the backscattering Internet of Things device in a current time-frequency resource and a second uplink subcarrier signal returned by the terminal device;

[0061] Sending a downlink subcarrier signal to a terminal device and a backscattering IoT device through the downlink subcarrier, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal, and enables the terminal device to receive the downlink subcarrier signal and return a second uplink subcarrier signal;

[0062] In the frequency division duplex uplink frequency band, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier, and the first uplink subcarrier signal is demodulated according to the resource scheduling method, or the first uplink subcarrier signal and the second uplink subcarrier signal are demodulated.

[0063] In one embodiment of the present disclosure, the scheduling unit is further configured to:

[0064] Obtaining a working cycle of the backscattering IoT device within a preset time period, and determining a working time ratio of the backscattering IoT device; the working time ratio is a ratio of the working time of the backscattering IoT device in a working cycle to the total time of a working cycle;

[0065] If the working duration ratio is less than a preset working duration threshold, scheduling resources for demodulating the first uplink subcarrier signal in the current time-frequency resource;

[0066] If the working duration ratio is greater than or equal to the preset working duration threshold, resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resources are scheduled.

[0067] In one embodiment of the present disclosure, the scheduling unit is further configured to:

[0068] The obtaining of the working cycle of the backscattering Internet of Things device within a preset time period includes:

[0069] configuring the working cycle of the backscattering IoT device to obtain the working cycle of the backscattering IoT device within a preset time period; or,

[0070] Send instruction information to the backscattering Internet of Things device to enable the backscattering Internet of Things device to upload a working cycle within a preset time period.

[0071] In a sixth aspect, an embodiment of the present disclosure provides a communication device based on frequency division duplexing, the device comprising:

[0072] A receiving unit, configured to receive a downlink subcarrier signal sent by a base station;

[0073] A modulation unit, configured to modulate the downlink subcarrier signal, shift the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtain a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device;

[0074] The returning unit is used to return the first uplink subcarrier signal to the base station in the frequency division duplex uplink frequency band, so that the base station schedules resources for demodulating the first uplink subcarrier signal.

[0075] In a seventh aspect, an embodiment of the present disclosure provides an electronic device, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the method described in the first aspect above by executing the executable instructions.

[0076] In an eighth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method described in the first aspect.

[0077] In a ninth aspect, according to another aspect of the present disclosure, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. The processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes any of the methods described above.

[0078] The embodiment of the present disclosure provides a communication method based on frequency division duplexing, which sends a downlink subcarrier signal to a backscattering IoT device. After receiving the downlink subcarrier signal, the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplexing (FDD) uplink frequency band, and obtains the modulated first uplink subcarrier signal; the frequency division duplexing uplink frequency band is the uplink frequency band for frequency division duplexing communication between the base station and the terminal device, and receives the first uplink subcarrier signal through the frequency division duplexing uplink frequency band, and schedules resources for demodulating the first uplink subcarrier signal. In the above manner, the backscattering IoT device moves the frequency band of the returned first uplink subcarrier signal to the frequency division duplexing uplink frequency band in the cellular network, and can directly reuse the transceiver of the base station without occupying additional spectrum, thereby improving spectrum efficiency.

[0079] Furthermore, when the base station receives the second uplink subcarrier signal returned by the terminal device and the first uplink subcarrier signal returned by the backscattering Internet of Things device by carrying the uplink subcarrier corresponding to the downlink subcarrier that sends the downlink subcarrier signal to the terminal device and the backscattering Internet of Things device, the signal demodulation resource scheduling method corresponding to the uplink subcarrier can be used. Before sending the downlink subcarrier signal, the base station can obtain the working cycle of the backscattering Internet of Things device in the preset time period to determine its working time ratio. If the working time ratio is less than the preset working time threshold, the signal demodulation resource for demodulating the first uplink subcarrier signal in the current time-frequency resource is scheduled. If the working time ratio is greater than or equal to the preset working time threshold, the signal demodulation resource for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resource is scheduled. In the above manner, the base station can receive the first uplink subcarrier signal and the second uplink subcarrier signal in the same time-frequency resource on the same uplink subcarrier, but choose to demodulate only the first uplink subcarrier signal in this time-frequency resource, thereby avoiding interference between signals to a certain extent and reducing the complexity of demodulation.

[0080] Furthermore, the base station determines the carrier resource scheduling method corresponding to the uplink subcarrier by carrying the uplink subcarrier corresponding to the downlink subcarrier that sends the downlink subcarrier signal to the terminal device and the backscattering Internet of Things device. If the working time ratio is less than the preset working time threshold, then in the current time-frequency, the uplink subcarrier is scheduled to carry the first uplink subcarrier signal. If the working time ratio is greater than or equal to the preset working time threshold, then in the current time-frequency, the uplink subcarrier is scheduled to carry the first uplink subcarrier signal and the second uplink subcarrier signal. In this way, in some cases, it is possible to avoid receiving the first uplink subcarrier signal and the second uplink subcarrier signal in the same time-frequency resource of the uplink subcarrier, to avoid interference between signals to a certain extent, and to reduce the complexity of demodulation.

[0081] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0083] Figure 1 A schematic diagram of the structure of a communication network in an embodiment of the present disclosure;

[0084] Figure 2 An interaction diagram of a communication method based on frequency division duplex in an embodiment of the present disclosure;

[0085] Figure 3 This is the second interactive diagram of a communication method based on frequency division duplex in an embodiment of the present disclosure;

[0086] Figure 4 A method for scheduling signal demodulation resources by a base station in an embodiment of the present disclosure;

[0087] Figure 5 Another method for scheduling signal demodulation resources by a base station in an embodiment of the present disclosure;

[0088] Figure 6 This is a third interactive diagram of a communication method based on frequency division duplex in an embodiment of the present disclosure;

[0089] Figure 7 This is a fourth interactive diagram of a communication method based on frequency division duplex in an embodiment of the present disclosure;

[0090] Figure 8 This is a fifth interactive diagram of a communication method based on frequency division duplex in an embodiment of the present disclosure;

[0091] Fig. 9 It is a structural schematic diagram of a communication device based on frequency division duplex in an embodiment of the present disclosure;

[0092] Fig.10 It is a structural schematic diagram of another communication device based on frequency division duplex in an embodiment of the present disclosure;

[0093] Fig.11 It is a structural schematic diagram of a base station in an embodiment of the present disclosure;

[0094] Fig.12 This is a schematic diagram of the structure of a backscattering Internet of Things device in an embodiment of the present disclosure;

[0095] Fig.13 It is a structural schematic diagram of an electronic device in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0096] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example 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.

[0097] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0098] In the prior art, the communication process between the base station and the reverse IoT device is as follows: the base station downlink signal is usually used as the excitation signal of the reverse IoT device, and the reverse IoT device can directly reflect it, that is, transmit the backscatter information on the same subcarrier, but this solution requires the deployment of a new backscatter receiver and interferes with other signals. In the prior art, the reverse IoT device can also shift the frequency of the returned backscatter signal to a clean spectrum to reduce interference with other signals, but this solution requires additional spectrum occupation and reduces spectrum efficiency.

[0099] Based on the above problem, a downlink subcarrier signal is sent to the backscatter IoT device. After receiving the downlink subcarrier signal, the backscatter IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains the modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is the uplink frequency band for frequency division duplex communication between the base station and the terminal device, and receives the first uplink subcarrier signal through the frequency division duplex uplink frequency band, and schedules the resources for demodulating the first uplink subcarrier signal. In the above manner, the backscatter IoT device moves the frequency band of the returned first uplink subcarrier signal to the frequency division duplex uplink frequency band in the cellular network, and can directly reuse the transceiver of the base station without occupying additional spectrum, thereby improving spectrum efficiency.

[0100] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0101] Figure 1 The structure diagram of a communication network applicable to the embodiment of the present application is shown in FIG.

[0102] The terminal 101 may be a terminal device or a user terminal (User Equipment, UE). The terminal 101 may be a terminal side device such as a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (Personal Digital Assistant, PDA), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device.

[0103] Optionally, the client of the application installed in different terminals 101 is the same, or the client of the same type of application based on different operating systems. Based on the different terminal platforms, the specific form of the client of the application can also be different, for example, the application client can be a mobile client, a PC client, etc.

[0104] The network side device 103 may be a base station or a core network. The base station may be a base station of 5G and later versions (e.g., gNB, 5G NR NB, etc.), or a base station in other communication systems (e.g., eNB, WLAN access point, or other access point, etc.). The base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present invention, only a base station in the NR system is used as an example, but the specific type of the base station is not limited. The base station can communicate with the terminal 101 and the backscattering IoT device 102 under the control of the base station controller, and the base station controller may be part of the core network or some base stations.

[0105] The terminal 101 can perform data transmission with the network side device 103 through the Uu interface, and can also perform direct communication through a through link.

[0106] The network side device 103 is used to send downlink signals and receive uplink backscatter signals from the backscatter IoT device 102 and uplink signals from the terminal 101 .

[0107] The backscattering IoT device 102 is used to receive the downlink signal sent by the network side device 103, use the downlink signal as an excitation signal, modulate its own information onto the excitation signal based on the excitation signal, and transmit it back to the network side device 103.

[0108] The terminal 101 is used to receive downlink signals from the network side device 103 and transmit uplink signals to the network side device 103 .

[0109] Those skilled in the art will know that Figure 1 The terminals, network side devices and backscattering IoT devices are only illustrative, and any number of terminals, network side devices and backscattering IoT devices may be provided according to actual needs. The embodiments of the present disclosure are not limited to this.

[0110] For example, the terminal may include multiple backscatter IoT devices, and the backscatter IoT devices may also include multiple backscatter IoT devices that process the same type of services. Alternatively, when configuring the backscatter IoT devices, the working cycles of the backscatter IoT devices may be configured to be the same cycle, and the types of services processed by the backscatter IoT devices may be configured to be similar.

[0111] The present exemplary implementation is described in detail below with reference to the accompanying drawings and embodiments.

[0112] First, a communication method based on frequency division duplex is provided in an embodiment of the present disclosure. Figure 2 An interactive schematic diagram of a communication method based on frequency division duplex in an embodiment of the present disclosure is shown, such as Figure 2 As shown, the frequency division duplex-based communication method provided in the embodiment of the present disclosure includes the following steps:

[0113] S202: Send a downlink subcarrier signal to a backscattering IoT device.

[0114] S204: Receive a downlink subcarrier signal sent by the base station.

[0115] S206: modulate the downlink subcarrier signal, shift the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtain a modulated first uplink subcarrier signal.

[0116] Among them, the frequency division duplex uplink frequency band is the uplink frequency band for frequency division duplex communication between the base station and the terminal equipment.

[0117] S208: Return the first uplink subcarrier signal to the base station in the frequency division duplex uplink frequency band.

[0118] S210: Receive a first uplink subcarrier signal in a frequency division duplex uplink frequency band, and schedule resources for demodulating the first uplink subcarrier signal.

[0119] In a possible embodiment, since in the prior art, in order to realize the backscattering Internet of Things device to directly transmit the backscattering information to the base station by reflection, it is necessary to deploy a new backscattering receiver. In this way in the present disclosure, after receiving the downlink subcarrier signal, the backscattering Internet of Things device can modulate the received downlink subcarrier signal through the modulation module to generate a first uplink subcarrier signal, and shift the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and reflect the first uplink subcarrier signal back to the base station through the frequency division duplex uplink frequency band. The base station can directly reuse the FDD transceiver without deploying a new backscattering receiver in the base station to receive the signal transmitted back by the backscattering Internet of Things device. In this way, there is no need to occupy additional spectrum, and the FDD uplink frequency band for communication between the base station and the terminal device can be reused, which can effectively improve the spectrum efficiency.

[0120] Since the communication method based on frequency division duplex in the present disclosure uses the uplink frequency band of frequency division duplex communication between the base station and the terminal device to reflect the signal back to the base station, it may cause the base station to simultaneously receive the first uplink subcarrier signal returned by the backscattering IoT device and the second uplink subcarrier signal returned by the terminal device in the same uplink subcarrier, and it is difficult and complicated to demodulate the first uplink subcarrier signal and the second uplink subcarrier signal at the same time. Therefore, based on this, the present disclosure provides two specific implementation methods to solve the above problems, which are as follows:

[0121] In a possible implementation, the base station schedules signal demodulation resources. The base station receives a first uplink subcarrier signal returned by a backscattered IoT device and a second uplink subcarrier signal returned by a terminal device in the same uplink subcarrier and the same time-frequency resource, and schedules signal demodulation resources according to different situations.

[0122] In a possible embodiment, Figure 3 As shown, the second communication method based on frequency division duplex provided in the embodiment of the present disclosure includes the following steps:

[0123] S302: Determine a signal demodulation resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering IoT device, to schedule a signal demodulation resource for demodulating the first uplink subcarrier signal in the current time-frequency resource.

[0124] Among them, the signal demodulation resource scheduling method includes: scheduling signal demodulation resources for demodulating the first uplink subcarrier signal returned by the backscattering Internet of Things device in the current time-frequency resources; or, scheduling signal demodulation resources for demodulating the first uplink subcarrier signal returned by the backscattering Internet of Things device in the current time-frequency resources and the second uplink subcarrier signal returned by the terminal device.

[0125] The signal demodulation resources may be understood as base station system resources required for a base station to demodulate one or several signals, or one or several signals.

[0126] Specifically, the specific method of determining the signal demodulation resource scheduling method corresponding to the uplink subcarrier is as follows:

[0127] Obtain the working cycle of the backscattering IoT device within a preset time period, and determine the working time ratio of the backscattering IoT device; the working time ratio is the ratio of the working time of the backscattering IoT device in one working cycle to the total time of one working cycle; if the working time ratio is less than the preset working time threshold, schedule the signal demodulation resources for demodulating the first uplink subcarrier signal in the current time-frequency resource; if the working time ratio is greater than or equal to the preset working time threshold, schedule the signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resource.

[0128] Exemplarily, the base station may instruct the backscattering IoT device to report its working cycle by transmitting indication information, or may configure the working cycle of the backscattering IoT device during the design phase of the backscattering IoT device to obtain the working cycle of the backscattering IoT device within a preset time period.

[0129] The following takes the example of the base station instructing the backscattering IoT device to report the working cycle by sending indication information. After receiving the indication information, the backscattering IoT device feeds back the working cycle within the preset time period to the base station.

[0130] It should be noted that the working cycle of the backscatter IoT device can be, for example, 20 seconds every 5 minutes, or 1 minute in the first hour, 2 minutes in the second hour, 3 minutes in the third hour, and then cycle in this regular pattern.

[0131] The base station counts the working time ratio of backscatter IoT devices within the preset time period T W , specifically, T W =T BD / T total , where T BD Indicates the working time of the backscatter IoT device, T totalIndicates the duration of the statistical working cycle within the preset time period. This value can be set according to the actual working conditions of the backscatter IoT device, base station service conditions, etc.

[0132] For example, if the backscatter IoT device works for 1 minute every 5 minutes and the statistics are for 1 hour, then T W =T BD / T total =1 / 6.

[0133] After determining the working time ratio, the base station sets a preset working time threshold T according to the number of users, traffic density, day and night, etc. in the base station service area. t .

[0134] It should be noted that, since the system resources of the base station are simultaneously carried in the corresponding uplink subcarrier to demodulate the second uplink subcarrier signal returned by the terminal device and the first uplink subcarrier signal returned by the backscattering Internet of Things device, it is difficult for the base station to demodulate. Therefore, the base station can choose to schedule only the system resources for demodulating the first uplink subcarrier signal returned by the backscattering Internet of Things device. This reduces the demodulation difficulty and reduces the demodulation complexity. However, only carrying the first uplink subcarrier signal returned by the backscattering Internet of Things device on some uplink subcarriers will cause a certain waste of resources. Therefore, by pre-setting a preset working time threshold, the tolerance of the base station to a certain waste of resources is indicated. For example, when the base station is in the suburbs and the number of users is small and the traffic density is low, the preset working time threshold T t A larger value can be set; when the base station is in a densely populated urban area, the preset working time threshold T t The daytime can be set to a smaller value, the night to a larger value, and so on.

[0135] Determine the above working hours proportion T W And the preset working time threshold T t After that, there are two specific situations:

[0136] (1) When T W ≥T t When the base station schedules, for the uplink subcarrier, signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resource.

[0137] Figure 4 A method for a base station to schedule signal demodulation resources is shown. Figure 4 BD in the figure can be understood as the signal demodulation resource of the first uplink subcarrier signal of the backscattered IoT device scheduled by the base station, and UE can be understood as the signal demodulation resource of the second uplink subcarrier signal of the terminal device scheduled by the base station. n Etc. represents the working time of the backscatter IoT device.

[0138] It should be noted that in this case, it can be understood that the backscattering IoT device works more frequently, so it is a waste to only schedule signal demodulation resources for demodulating the first uplink subcarrier signal among multiple time-frequency resources. The base station can simultaneously schedule signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resources, and demodulate the information in the two signals through technologies such as continuous elimination.

[0139] (2) When T W <T t When the signal demodulation resources for demodulating the first uplink subcarrier signal in the current time-frequency resources are scheduled.

[0140] Figure 5 Another method for base station scheduling signal demodulation resources is shown. Figure 5 BD and UE in Figure 4 can be understood as the same meaning. Figure 5 It can be seen that the backscattering IoT device has a short working time, which allows the base station to only schedule signal demodulation resources for demodulating the first uplink subcarrier signal returned by the backscattering IoT device in the current time-frequency resources.

[0141] The demodulation methods for the second uplink subcarrier signal returned by the terminal device include but are not limited to the following: (1) demodulating the second uplink subcarrier signal returned by the terminal device in the next time-frequency resource. (2) sequentially scheduling signal demodulation resources to demodulate signals, first demodulating the first uplink subcarrier signal, and then the base station uses the remaining signal demodulation resources to demodulate the second uplink subcarrier signal.

[0142] It should be noted that the signal demodulation resource scheduling method of the uplink subcarrier can also be predetermined. For example, in the design phase of the backscatter IoT device, the working cycle of the backscatter IoT device is obtained, and the signal demodulation resource scheduling method can be determined in advance according to the preset working time thresholds in different time periods. Furthermore, as the number of users served by the base station and the communication traffic increase, the preset working time thresholds can also be reconfigured.

[0143] Through the above method, the specific signal demodulation resource scheduling method can be determined. Figure 3 The step S302 of the above-mentioned example takes scheduling of signal demodulation resources for demodulating the first uplink subcarrier signal in the current time-frequency resources as an example.

[0144] S304: Send a downlink subcarrier signal to the terminal device and the backscattering IoT device via the downlink subcarrier.

[0145] S306: The backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal.

[0146] S308: The terminal device receives the downlink subcarrier signal and returns the second uplink subcarrier signal, backscatters the IoT device in the frequency division duplex uplink frequency band, and returns the first uplink subcarrier signal.

[0147] S310: In a frequency division duplex uplink frequency band, receive a first uplink subcarrier signal and a second uplink subcarrier signal through an uplink subcarrier.

[0148] S312: According to the signal demodulation resource scheduling mode, schedule the signal demodulation resource for demodulating the first uplink subcarrier signal in the current time-frequency resource, and demodulate the first uplink subcarrier signal.

[0149] In another possible embodiment, Figure 6 A third communication method based on frequency division duplex is shown, such as Figure 6 As shown, the frequency division duplex-based communication method provided in the embodiment of the present disclosure includes the following steps:

[0150] S602: Determine a signal demodulation resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering IoT device, to schedule signal demodulation resources for demodulating a first uplink subcarrier signal and a second uplink subcarrier signal in a current time-frequency resource.

[0151] S604: Send a downlink subcarrier signal to the terminal device and the backscattering IoT device via the downlink subcarrier.

[0152] S606: The backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal.

[0153] S608: The terminal device receives the downlink subcarrier signal and returns the second uplink subcarrier signal. The backscatter IoT device returns the first uplink subcarrier to the base station in the frequency division duplex uplink frequency band.

[0154] S610: In a frequency division duplex uplink frequency band, receive a first uplink subcarrier signal and a second uplink subcarrier signal through an uplink subcarrier.

[0155] S612: Schedule signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resource, and demodulate the first uplink subcarrier signal and the second uplink subcarrier signal.

[0156] In view of the fact that it is difficult and complicated for the above-mentioned base station to simultaneously receive the first uplink subcarrier signal returned by the backscattered Internet of Things device and the second uplink subcarrier signal returned by the terminal device in the same uplink subcarrier, and to simultaneously demodulate the first uplink subcarrier signal and the second uplink subcarrier signal, another possible implementation method is provided.

[0157] In another possible implementation, the base station schedules carrier resources. The base station chooses to receive only the first uplink subcarrier signal returned by the backscattering IoT device in the uplink subcarriers in the same uplink subcarrier and the same time-frequency resource, or to receive both the first uplink subcarrier signal returned by the backscattering IoT device and the second uplink subcarrier signal returned by the terminal device, and schedules carrier resources according to different situations.

[0158] In one possible embodiment, Figure 7 A fourth communication method based on frequency division duplex is shown, comprising the following steps:

[0159] S702: Determine a carrier resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device, which is a first carrier resource scheduling method.

[0160] Among them, the first carrier resource scheduling method is to schedule the uplink subcarrier to carry the first uplink subcarrier signal returned by the backscattered Internet of Things device.

[0161] It should be noted that in this implementation mode, the technical means for determining the carrier resource scheduling method is the same as the above Figure 3 The communication method provided is the same, and the carrier resource scheduling method is also determined by the working time ratio of the backscattering IoT device and the preset working time threshold. Figure 7 The first carrier resource scheduling method is taken as an example.

[0162] Exemplarily, if the proportion of working time is less than the preset working time threshold, it means that the backscattering IoT device occasionally works, and it is feasible to use the uplink subcarrier in certain time-frequency resources only to carry the first uplink subcarrier signal returned by the backscattering IoT device. This can effectively reduce the difficulty of demodulating information, avoid interference between the uplink signal between the backscattering IoT device and the terminal device, reduce the calculation amount of demodulation information, and the present disclosure can provide limited guarantee for the signal of the backscattering IoT device to be transmitted back to the base station.

[0163] S704: Send a downlink subcarrier signal to the terminal device and the backscattering IoT device via the downlink subcarrier.

[0164] S706: The backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal.

[0165] S708: The backscattering IoT device returns a first uplink subcarrier signal in a frequency division duplex uplink frequency band via an uplink subcarrier; the terminal device receives the downlink subcarrier signal and does not return a second uplink subcarrier signal.

[0166] S710: Receive a first uplink subcarrier signal through an uplink subcarrier in a frequency division duplex uplink frequency band.

[0167] S712: The base station schedules signal demodulation resources to demodulate the first uplink subcarrier signal.

[0168] In another possible embodiment, Figure 8 A fifth communication method based on frequency division duplex is shown, comprising the following steps:

[0169] S802: Determine a carrier resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device, which is a second carrier resource scheduling method.

[0170] Among them, the second carrier resource scheduling method is to schedule the uplink subcarrier in the current time-frequency resource to carry the first uplink subcarrier signal returned by the backscattered Internet of Things device and the second uplink subcarrier signal returned by the terminal device.

[0171] Exemplarily, if the working time ratio is greater than or equal to the preset working time threshold, it means that the backscattering IoT device is often working, and using the uplink subcarrier in certain time-frequency resources only to carry the first uplink subcarrier signal returned by the backscattering IoT device is a waste of carrier resources. Therefore, continuous elimination and other technologies are used to demodulate the signals of the two.

[0172] S804: Send a downlink subcarrier signal to the terminal device and the backscattering IoT device via the downlink subcarrier.

[0173] S806: The backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal.

[0174] S808: The backscatter IoT device returns a first uplink subcarrier signal in a frequency division duplex uplink frequency band via an uplink subcarrier, and the terminal device receives the downlink subcarrier signal and returns a second uplink subcarrier signal.

[0175] S810: In a frequency division duplex uplink frequency band, receive a first uplink subcarrier signal and a second uplink subcarrier signal through an uplink subcarrier.

[0176] S812: The base station schedules signal demodulation resources to demodulate the first uplink subcarrier signal and the second uplink subcarrier signal.

[0177] Based on the same inventive concept, the present disclosure also provides a communication device based on frequency division duplex, such as the following embodiment. Since the principle of solving the problem in the device embodiment is similar to that in the above method embodiment, the implementation of the device embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.

[0178] Fig. 9 A schematic diagram of the structure of a communication device based on frequency division duplexing in an embodiment of the present disclosure is shown. Fig. 9 As shown, the frequency division duplex-based communication device 90 includes:

[0179] The sending unit 901 is used to send a downlink subcarrier signal to the backscattering IoT device, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between the base station and the terminal device;

[0180] The scheduling unit 902 is configured to receive a first uplink subcarrier signal in a frequency division duplex uplink frequency band, and schedule resources for demodulating the first uplink subcarrier signal.

[0181] Based on the same inventive concept, Fig.10 A schematic diagram of the structure of a communication device based on frequency division duplexing in an embodiment of the present disclosure is shown. Fig.10 As shown, the frequency division duplex-based communication device 100 includes:

[0182] The receiving unit 1001 is configured to receive a downlink subcarrier signal sent by a base station;

[0183] The modulation unit 1002 is used to modulate the downlink subcarrier signal, shift the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtain a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between the base station and the terminal device;

[0184] The returning unit 1003 is configured to return the first uplink subcarrier signal to the base station in the frequency division duplex uplink frequency band, so that the base station schedules resources for demodulating the first uplink subcarrier signal.

[0185] Fig.11FIG. 1 shows a schematic diagram of the structure of a base station provided by an embodiment of the present disclosure, that is, a schematic diagram of the structure of a base station. Fig.11 As shown, the base station includes a processor 1100, a memory 1101 and a frequency division duplex transceiver 1102;

[0186] The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 can store data used by the processor 1100 when performing operations. The frequency division duplex transceiver 1102 is used to receive and send data under the control of the processor 1100.

[0187] The bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1100 and memory represented by memory 1101. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. Processor 1100 is responsible for managing the bus architecture and general processing, and memory 1101 may store data used by processor 1100 when performing operations.

[0188] The process disclosed in the embodiment of the present invention can be applied to the processor 1100, or implemented by the processor 1100. In the implementation process, each step of the signal processing process can be completed by the hardware integrated logic circuit or software instructions in the processor 1100. The processor 1100 can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiment of the present invention. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware processor to be executed, or a combination of hardware and software modules in the processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1101, and the processor 1100 reads the information in the memory 1101 and completes the steps of the signal processing process in combination with its hardware.

[0189] Specifically, the processor 1100 is used to read the program in the memory 1101 and execute: sending a downlink subcarrier signal to the backscattering Internet of Things device so that the backscattering Internet of Things device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between the base station and the terminal device; receiving the first uplink subcarrier signal in the frequency division duplex uplink frequency band, and scheduling resources for demodulating the first uplink subcarrier signal.

[0190] Fig.12 A schematic diagram of the structure of a backscattering IoT device is shown, Fig.12 As shown, the backscattering IoT device includes an antenna 1200 and a signal modulation module 1201.

[0191] The antenna 1200 is used to receive a downlink subcarrier signal sent by a base station and return a first uplink subcarrier signal to the base station.

[0192] The signal modulation module 1201 is used to modulate the downlink subcarrier signal, shift the frequency of the downlink subcarrier signal to the frequency division duplex uplink frequency band, and obtain a modulated first uplink subcarrier signal.

[0193] In addition, the backscattering Internet of Things device may also include a power module 1202, a sensor module 1203, a control module 1204, a signal synchronization 1205, etc.

[0194] Refer to the following Fig.13 1300 according to this embodiment of the present disclosure is described. Fig.13 The electronic device 1300 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0195] like Fig.13 As shown, the electronic device 1300 is in the form of a general computing device. The components of the electronic device 1300 may include but are not limited to: at least one processing unit 1310, at least one storage unit 1320, and a bus 1330 connecting different system components (including the storage unit 1320 and the processing unit 1310).

[0196] The storage unit stores a program code, which can be executed by the processing unit 1310, so that the processing unit 1310 performs the steps of various exemplary embodiments of the present disclosure described in the above "Exemplary Method" section of this specification. For example, the processing unit 1310 can perform the following steps in the above method embodiment, for example: XXXX.

[0197] The storage unit 1320 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 13201 and / or a cache storage unit 13202 , and may further include a read-only storage unit (ROM) 13203 .

[0198] The storage unit 1320 may also include a program / utility 13204 having a set (at least one) of program modules 13205, such program modules 13205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0199] Bus 1330 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0200] The electronic device 1300 may also communicate with one or more external devices 1340 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 1300, and / or communicate with any device that enables the electronic device 1300 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 1350. Furthermore, the electronic device 1300 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 1360. As shown, the network adapter 1360 communicates with other modules of the electronic device 1300 via a bus 1330. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 1300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0201] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0202] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device performs any of the above-mentioned frequency division duplex-based communication methods.

[0203] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, which may be a readable signal medium or a readable storage medium. A program product capable of implementing the above method of the present disclosure is stored thereon. In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to cause the terminal device to execute the steps according to various exemplary implementations of the present disclosure described in the above “Exemplary Method” section of this specification.

[0204] More specific examples of computer-readable storage media in the present disclosure may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0205] In the present disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, wherein a readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A readable signal medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0206] Alternatively, the program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0207] In a specific implementation, the program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0208] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0209] In addition, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0210] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0211] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A communication method based on frequency division duplex, characterized in that: Applied to a base station, the method comprises: Sending a downlink subcarrier signal to a terminal device and a backscattering IoT device, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device; Obtaining a working cycle of the backscattering IoT device within a preset time period, and determining a working time ratio of the backscattering IoT device; the working time ratio is a ratio of the working time of the backscattering IoT device in a working cycle to the total time of a working cycle; If the working time ratio is less than the preset working time threshold, then when the backscattering IoT device is working, in the frequency division duplex uplink frequency band, the first uplink subcarrier signal is received through the uplink subcarrier, and a signal demodulation resource for demodulating the first uplink subcarrier signal in the current time-frequency resource is scheduled; If the working time ratio is greater than or equal to the preset working time threshold, then when the backscattering Internet of Things device is working, in the frequency division duplex uplink frequency band, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier, and signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resources are scheduled.

2. The communication method based on frequency division duplex according to claim 1, characterized in that: The method further comprises: Determine a carrier resource scheduling method for an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device; the carrier resource scheduling method includes: a first carrier resource scheduling method for scheduling the uplink subcarrier to carry a first uplink subcarrier signal returned by the backscattering Internet of Things device in a current time-frequency resource, and a second carrier resource scheduling method for scheduling the uplink subcarrier to carry a first uplink subcarrier signal returned by the backscattering Internet of Things device and a second uplink subcarrier signal returned by the terminal device in a current time-frequency resource; Sending a downlink subcarrier signal to a terminal device and a backscattering IoT device through the downlink subcarrier, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal, and enables the terminal device to receive the downlink subcarrier signal and return a second uplink subcarrier signal; If the carrier resource scheduling mode is the first carrier resource scheduling mode, receiving the first uplink subcarrier signal through the uplink subcarrier in the frequency division duplex uplink frequency band; If the carrier resource scheduling mode is the second carrier resource scheduling mode, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier in the frequency division duplex uplink frequency band.

3. The communication method based on frequency division duplex according to claim 2, characterized in that: The method of determining a carrier resource scheduling method of an uplink subcarrier corresponding to a downlink subcarrier that carries a downlink subcarrier signal sent to a terminal device and a backscattering Internet of Things device includes: Obtaining a working cycle of the backscattering IoT device within a preset time period, and determining a working time ratio of the backscattering IoT device; the working time ratio is a ratio of the working time of the backscattering IoT device in a working cycle to the total time of a working cycle; If the working duration ratio is less than a preset working duration threshold, scheduling the uplink subcarrier to carry the first uplink subcarrier signal in the current time-frequency; If the working duration ratio is greater than or equal to the preset working duration threshold, then in the current time-frequency, the uplink subcarrier is scheduled to carry the first uplink subcarrier signal and the second uplink subcarrier signal.

4. The frequency division duplex communication method according to any one of claims 1 or 3, characterized in that: The obtaining of the working cycle of the backscattering Internet of Things device within a preset time period includes: configuring the working cycle of the backscattering IoT device to obtain the working cycle of the backscattering IoT device within a preset time period; or, Send instruction information to the backscattering Internet of Things device to enable the backscattering Internet of Things device to upload a working cycle within a preset time period.

5. The frequency division duplex based communication method according to claim 1 or 3, characterized in that: The preset working time threshold is pre-set according to the corresponding number of users and traffic density in the base station service area.

6. A base station, characterized in that: include: Memory, frequency division duplex transceiver, and processor; The memory is used to store computer programs; a frequency division duplex transceiver for transmitting and receiving data under the control of the processor; The processor is configured to read the computer program in the memory and perform the following operations: Sending a downlink subcarrier signal to a terminal device and a backscattering IoT device, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device; Obtaining a working cycle of the backscattering IoT device within a preset time period, and determining a working time ratio of the backscattering IoT device; the working time ratio is a ratio of the working time of the backscattering IoT device in a working cycle to the total time of a working cycle; If the working time ratio is less than the preset working time threshold, then when the backscattering IoT device is working, in the frequency division duplex uplink frequency band, the first uplink subcarrier signal is received through the uplink subcarrier, and a signal demodulation resource for demodulating the first uplink subcarrier signal in the current time-frequency resource is scheduled; If the working time ratio is greater than or equal to the preset working time threshold, then when the backscattering Internet of Things device is working, in the frequency division duplex uplink frequency band, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier, and signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resources are scheduled.

7. A communication device based on frequency division duplex, characterized in that: The device comprises: A sending unit, configured to send a downlink subcarrier signal to a terminal device and a backscattering IoT device, so that the backscattering IoT device modulates the downlink subcarrier signal, shifts the frequency of the downlink subcarrier signal to a frequency division duplex uplink frequency band, and obtains a modulated first uplink subcarrier signal; the frequency division duplex uplink frequency band is an uplink frequency band for frequency division duplex communication between a base station and a terminal device; A scheduling unit is used to obtain the working cycle of the backscattering Internet of Things device within a preset time period, and determine the working time ratio of the backscattering Internet of Things device; the working time ratio is the ratio of the working time of the backscattering Internet of Things device in a working cycle to the total time of a working cycle; if the working time ratio is less than the preset working time threshold, then when the backscattering Internet of Things device is working, in the frequency division duplex uplink frequency band, the first uplink subcarrier signal is received through the uplink subcarrier, and the signal demodulation resources for demodulating the first uplink subcarrier signal in the current time-frequency resource are scheduled; if the working time ratio is greater than or equal to the preset working time threshold, then when the backscattering Internet of Things device is working, in the frequency division duplex uplink frequency band, the first uplink subcarrier signal and the second uplink subcarrier signal are received through the uplink subcarrier, and the signal demodulation resources for demodulating the first uplink subcarrier signal and the second uplink subcarrier signal in the current time-frequency resource are scheduled.

8. An electronic device, characterized in that: include: processor; as well as A memory, configured to store executable instructions of the processor; The processor is configured to perform the method of any one of claims 1 to 5 by executing the executable instructions.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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