Electronic device, wireless communication method, and computer readable medium

Abstract

The disclosure relates to an electronic device, a wireless communication method, and a computer readable medium. An electronic device for wireless communication according to one embodiment includes processing circuitry. The processing circuitry is configured to obtain a distance between a transmitting end and a receiving end of backscatter communication, determine one or more ambient radio frequency sources for the backscatter communication based on the distance, and inform or control the ambient radio frequency sources to provide radio frequency signals for the backscatter communication.

Description

[0001] This application claims priority to Chinese Patent Application No. 201910822606.6, filed on September 2, 2019, entitled "Electronic Device, Wireless Communication Method and Computer-Readable Medium", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure generally relates to the field of wireless communications, and more specifically to electronic devices, wireless communication methods, and computer-readable media for wireless communications. Background Technology

[0003] Ambient backscatter utilizes radio frequency (RF) signals, such as those from radio, television, and mobile phones, to enable data transmission without batteries. Ambient backscatter technology can be used in devices where it is inconvenient to supply or replace external power sources, and it holds promise for enabling low-power and low-cost communication in Internet of Things (IoT) applications.

[0004] The backscatter receiver (BRx) performs decoding based on energy detection, where direct link interference from ambient RF sources is treated as noise. This method places high demands on the signal-to-noise ratio of the communication system and results in a relatively low data transmission rate. Furthermore, in some applications, additional time-frequency resources are allocated to ambient backscatter communication to suppress direct link interference. Specifically, additional time-frequency resources can be allocated to backscatter communication, allowing ambient RF sources to provide RF signals to the backscatter transmitter (BTx) at specific times or frequencies. Alternatively, the BTx can be configured with dedicated hardware to frequency-shift the backscattered signal to a non-overlapping frequency band. Summary of the Invention

[0005] A brief overview of embodiments of the invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] According to one embodiment, an electronic device for wireless communication is provided, comprising processing circuitry. The processing circuitry is configured to: obtain the distance between a transmitter and a receiver for backscatter communication; determine one or more ambient radio frequency (RF) sources for backscatter communication based on the distance; and notify or control the ambient RF sources to provide RF signals for the backscatter communication.

[0007] According to one embodiment, a wireless communication method includes: obtaining the distance between a transmitter and a receiver for backscatter communication; determining one or more ambient radio frequency sources for backscatter communication based on the distance; and notifying or controlling the ambient radio frequency sources to provide radio frequency signals for backscatter communication.

[0008] According to one embodiment, an electronic device for wireless communication is provided, comprising processing circuitry. The processing circuitry is configured to: estimate the distance between a transmitter and a receiver for backscatter communication; notify the estimated distance to a serving base station of the receiver; and perform backscatter communication using a radio frequency signal from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

[0009] According to one embodiment, a wireless communication method includes: estimating the distance between a transmitter and a receiver for backscatter communication; notifying the estimated distance to a serving base station of the receiver; and performing backscatter communication using radio frequency signals from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

[0010] According to one embodiment, an electronic device for wireless communication is provided, comprising processing circuitry. The processing circuitry is configured to: determine time-frequency resources for backscatter communication based on a resource allocation request from a communication device; control the communication device to notify the determined time-frequency resources; and control the communication device to provide a radio frequency signal for backscatter communication. The resource allocation request is sent by the communication device to an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication.

[0011] According to one embodiment, a wireless communication method includes: determining time-frequency resources for backscatter communication based on a resource allocation request from a communication device; notifying the communication device of the determined time-frequency resources; and providing a radio frequency signal for the backscatter communication. The resource allocation request is sent by the communication device to an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication.

[0012] The embodiments disclosed herein are beneficial for improving the quality of backscatter communication. Attached Figure Description

[0013] The present invention can be better understood by referring to the description given below in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts. These drawings, together with the following detailed description, are incorporated in and form part of this specification, and are used to further illustrate preferred embodiments of the invention and explain the principles and advantages of the invention. In the drawings:

[0014] Figure 1This is a block diagram illustrating an example configuration of an electronic device for wireless communication according to an embodiment of the present invention;

[0015] Figure 2 An example process for determining the environmental radio frequency source is shown;

[0016] Figure 3 An example process for determining the signal coverage of an environmental radio frequency source is shown;

[0017] Figure 4 An example process for identifying and handling interference sources is shown;

[0018] Figure 5 An example process for determining the signal prohibition range of an interference source is shown;

[0019] Figure 6 This is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention;

[0020] Figure 7 This is a block diagram illustrating an example configuration of an electronic device for wireless communication according to an embodiment of the present invention;

[0021] Figure 8 This is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention;

[0022] Figure 9 This is a block diagram illustrating an example configuration of an electronic device for wireless communication according to an embodiment of the present invention;

[0023] Figure 10 This is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention;

[0024] Figure 11 This is a block diagram illustrating an exemplary structure of a computer that implements the methods and apparatus of this disclosure;

[0025] Figure 12 This is a block diagram illustrating an example of a schematic configuration of a smartphone to which the technologies of this disclosure can be applied;

[0026] Figure 13 This is a block diagram illustrating an example of a schematic configuration of a gNB (base station) to which the technologies of this disclosure can be applied;

[0027] Figure 14 This is a schematic diagram used to illustrate interference when the environmental RF source and BRx are different physical entities;

[0028] Figure 15 This is a schematic diagram used to illustrate interference when the environmental RF source and BRx are the same physical entity;

[0029] Figure 16 This is a schematic diagram illustrating the backscatter communication process when estimating the distance between the transmitter and receiver;

[0030] Figure 17 An example application scenario involving a cooperative relay network with backscattering is shown;

[0031] Figure 18 It shows Figure 17 A specific example of the application scenario shown;

[0032] Figure 19 An example of an application scenario involving a homogeneous multi-cell network with short-range backscattering is shown;

[0033] Figure 20 An example of an application scenario involving a homogeneous multi-cell network with long-range backscattering is shown;

[0034] Figure 21 An example of an application scenario involving heterogeneous ultra-dense networking with short-range backscattering is shown;

[0035] Figure 22 An example of an application scenario involving heterogeneous ultra-dense networking with long-range backscattering is shown;

[0036] Figure 23 This is a schematic diagram illustrating a planar geometric model of a cellular communication system that includes backscattering;

[0037] Figure 24 An example of an application scenario with two environmental RF sources is shown;

[0038] Figure 25 This is a schematic diagram illustrating an example of how to scan the angle of an RF source in a computing environment;

[0039] Figure 26 This is a schematic diagram illustrating a planar geometric model when the serving base station does not know the location of BRx;

[0040] Figure 27 This is a schematic diagram illustrating an example method for calculating the scanning prohibition angle of interference sources;

[0041] Figure 28 This is a signaling flowchart used to illustrate an example of a communication process when the serving base station and the environmental RF source are different physical entities;

[0042] Figure 29 This is a signaling flowchart illustrating an example of a communication process when the serving base station and the environmental RF source are the same physical entity; and

[0043] Figure 30This is a signaling flowchart used to illustrate an example of the communication process when the serving base station does not know the location of BRx. Detailed Implementation

[0044] Embodiments of the present invention will now be described with reference to the accompanying drawings. Elements and features described in one drawing or embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that, for clarity, representations and descriptions of components and processes unrelated to the present invention and known to those skilled in the art have been omitted from the drawings and description.

[0045] like Figure 1 As shown, the electronic device 100 for wireless communication according to this embodiment includes a processing circuit 110. The processing circuit 110 may be implemented as a specific chip, chipset, or central processing unit (CPU), etc.

[0046] The processing circuit 110 includes an acquisition unit 111, a determination unit 113, and a control unit 115. It should be noted that although the acquisition unit 111, determination unit 113, and control unit 115 are shown as functional blocks in the figures, it should be understood that the functions of each unit can also be implemented by the processing circuit as a whole, and not necessarily by discrete physical components within the processing circuit. Furthermore, although the processing circuit is shown as a single block in the figures, the electronic device may include multiple processing circuits, and the functions of each unit can be distributed across multiple processing circuits, so that these functions are performed collaboratively by multiple processing circuits.

[0047] Before further describing this embodiment, a brief description will first be given of the transmitter, receiver, environmental RF source, and interference source of backscatter communication.

[0048] Cellular communication systems involving ambient backscattering can be broadly classified into two categories: one where the ambient RF source and the BRx are different physical nodes, and the other where they are the same physical node. The system block diagrams for these two categories are as follows: Figure 14 and Figure 15As shown. BTx can be an IoT terminal or tag. It harvests energy from RF signals provided by surrounding signal sources to drive its internal circuitry, modulates the symbolic information to be transmitted onto the received signal, and reflects it back to BRx. BRx can be a relay or tag, which needs to decode the valid symbolic information from the received signal, which has some interference. The environmental RF source can be a relay, a small cell access point (AP), or a gNB. The RF signals it transmits can provide energy for BTx to perform environmental backscatter communication. The interference source can also be a relay, a small cell AP, or a gNB. The RF signals it transmits interfere with environmental backscatter communication. Environmental backscatter communication refers to BTx utilizing existing RF signals in the surrounding environment to harvest energy to drive its internal circuitry, reflecting the modulated signal back to BRx to achieve information transmission (e.g., ...). Figure 14 and Figure 15 (As shown in the figure).

[0049] In addition, such as Figure 14 and Figure 15 As shown, interference signals can be roughly divided into the following three categories: ① interference from environmental RF sources to BRx; ② interference from interference sources to BTx; ③ interference from interference sources to BRx. The environmental RF source can be a relay, gNB, or small cell AP (which can be selected by the serving gNB of the BRx), while the interference source can be a gNB or small cell AP (which can be determined by the serving gNB).

[0050] The following reference Figures 17 to 22 Briefly illustrate application examples of cellular communication systems that incorporate environmental backscattering.

[0051] Figure 17 It is a cooperative relay network with environmental backscattering. The relay is the environmental RF source, while other signal sources are interference sources.

[0052] Figure 18 A more concrete example of a cooperative relay network incorporating environmental backscattering is given. The power and hardware limitations of the IoT terminal (as a BTx), along with the long distance between it and the serving gNB, make direct communication with the serving gNB difficult. For example... Figure 18 As shown, three IoT terminals use sensors to collect information and upload it to the drone (as BRx) via backscattering. The drone receives information from all the IoT terminals and forwards it to the service gNB.

[0053] Figure 19 and Figure 20 Homogeneous multi-cell networks with short-range and long-range backscattering are illustrated. The serving gNB can select environmental RF sources, while other signal sources within a certain range can be identified as interference sources. BRx located within the coverage areas of different signal sources are affected by different interferences.

[0054] Figure 21 and Figure 22 Heterogeneous ultra-dense networks with short-range and long-range backscattering are shown respectively, and they are compared with... Figure 19 and Figure 20 The difference lies in the fact that the structure of cells and the distribution of signal sources in heterogeneous ultra-dense networks are more complex.

[0055] Return to reference Figure 1 The electronic device 100 according to this embodiment can, for example, function as a serving base station of the receiving end; however, the present invention is not limited thereto.

[0056] According to one embodiment, the obtaining unit 111 is configured to obtain the distance between the transmitting end (BTx) and the receiving end (BRx) of the backscatter communication.

[0057] According to one embodiment, the obtaining unit 111 obtains the distance between the transmitting end and the receiving end by performing specific backscatter communication between the receiving end and the transmitting end, and estimating the distance between the receiving end and the transmitting end based on the initial signal transmission power of the receiving end and the power of the reflected signal received by the receiving end from the transmitting end.

[0058] Figure 16 An example of a specific backscatter communication process is shown when BRx performs distance estimation. In this example, BRx first broadcasts an RF signal with power P1; then, BTx harvests energy from the RF signal and reflects the symbol information "1" back to BRx; assuming that the distance between the backscattering transceiver is much smaller than the distance between the signal source and BTx, interference signals from the signal source are ignored when BRx performs distance estimation.

[0059] The received signal power of BTx can be expressed as Among them, G T (G R ) represents the transmit (or receive) antenna gain of BRx (or BTx), c represents the speed of light, and f c d represents the carrier frequency of the RF signal, and d represents the distance between the transmitter and receiver that needs to be estimated.

[0060] Similarly, the received signal power at BRx can be expressed as Where η represents the reflection coefficient of BTx, which controls the power of the reflected signal.

[0061] Therefore, the distance between the backscattering transmitter and receiver can be expressed by the following equation (1):

[0062]

[0063] BRx sends the estimated distance to the service gNB it is connected to for further calculations.

[0064] It should be noted that the above method of determining distance is exemplary and not restrictive.

[0065] Continue to refer to Figure 1 The determining unit 113 is configured to determine one or more environmental radio frequency sources for backscatter communication based on the distance obtained by the obtaining unit 111.

[0066] like Figure 2 As shown, according to one embodiment, when the location of the receiver can be obtained (the location of the terminal can be obtained in various ways, such as observed time difference of arrival (OTDOA)), the determining unit 113 can identify one or more signal sources at the transmitting end whose estimated received power reaches a predetermined level as environmental radio frequency sources based on the location of the receiver and the distance between the transmitting end and the receiver. On the other hand, when the location of the receiver cannot be obtained, the determining unit 113 can at least identify the serving base station of the receiver as an environmental radio frequency source.

[0067] Taking the case where the electronic device 100 operates as the receiving end of the serving base station as an example, the serving gNB of BRx can compare the received power of each neighboring signal source reaching BTx. To ensure the quality of environmental backscatter communication, the serving gNB can determine the set of environmental RF sources based on the transmission power of each signal source and the distance of the signal source from BTx. If the serving gNB does not know the location of BRx, it selects itself and neighboring signal sources (if multiple environmental RF sources are required) as environmental RF sources.

[0068] More specifically, the serving gNB can compare the received power of each adjacent signal source at the BTx. The planar geometric model of a cellular communication system incorporating environmental backscattering is as follows: Figure 23 As shown. If the service gNB knows the location of BRx and has obtained the distance between the backscattering transceiver, then BTx can be a point on a circle with BRx as the origin and d as the radius. Figure 23 The text presents two possible locations (A) for BTx. Assuming the interference range at BTx is defined as l (l > d), all signal sources within a circle with BRx as the origin and (d + l) as the radius can be candidates for both environmental RF sources and interference sources. Assuming the serving gNB knows the location and transmit power of each candidate signal source, the i-th adjacent signal source D... i The received power at BTx is expressed as Among them, P Di It is D i The transmission power, G Di (G A) is D i (BTx) transmit (receive) antenna gain, r i It is signal source D i The distance between BRx and BRx.

[0069] To obtain the best environmental backscatter communication quality, the signal source with the highest received power at BTx can be selected as the primary environmental RF source, using D... j It means that, among them,

[0070]

[0071] Then, the serving gNB can send a configuration message to the primary environment RF source, requesting the signal source to determine the time and frequency resource allocation (as described in the following examples).

[0072] The above process is based on the assumption that the serving gNB knows the location of BRx. The following describes the case where the serving gNB does not know the location of BRx, in which case the possible location area of ​​BTx is larger. Assuming the interference range at BTx is given, all signal sources within a circle centered on the serving gNB with a radius of (d+d0+l) can be candidates for both environmental RF sources and interference sources. Since the serving gNB has the highest probability of covering BTx, it can be selected as the primary environmental RF source.

[0073] If only one environmental RF source is needed, then the set of environmental RF sources will contain only one element, D. j If multiple environmental RF sources need to work together, then the selected D j Based on the maximum received power criterion, some nearby signal sources are added sequentially to the set of environmental RF sources until the required number is reached.

[0074] Regarding the selection of the serving gNB and the ambient RF source, the serving gNB must be selected within the coverage area of ​​the signal source so that the serving gNB can obtain the location of the BRx or estimate its distance to the BRx, and the two can communicate. The selection criterion for the ambient RF source is the maximum received power at the BTx. This is because higher received power at the BTx means more energy is collected, higher reflected signal power, and higher backscatter communication quality. Therefore, the serving gNB and the ambient RF source can be different physical nodes or the same physical node.

[0075] Incidentally, although current environmental backscattering techniques typically support only a single environmental RF source, it is possible to support multiple environmental RF sources working together. Taking heterogeneous ultra-dense networking applications as an example, in... Figure 24 The example given has two environmental RF sources. AP1 and AP2 together provide RF signals to BTx.

[0076] The above describes an embodiment of selecting an ambient radio frequency source. Furthermore, according to one embodiment, the determining unit 113 can also determine the signal coverage range of the ambient radio frequency source.

[0077] Specifically, such as Figure 3 As shown, when the location of the receiver can be obtained, the determining unit 113 can determine the signal coverage range of the environmental radio frequency source based on the locations of the environmental radio frequency source and the receiver, as well as the distance between the transmitter and the receiver, so that the transmitter is within the signal coverage range. On the other hand, when the location of the receiver cannot be obtained, the determining unit 113 can estimate the distance between the receiver and the serving base station.

[0078] Taking the case where the electronic device 100 is the receiving end of the serving base station as an example, the serving gNB can collect two distance data: the distance between the transceiver and the distance from each environmental RF source to the BRx, which are used to calculate the scanning angle of all signal sources in the environmental RF source set. If the serving gNB does not know the location of the BRx, it does not perform angle calculation, but instead estimates the distance between the serving gNB and the BRx.

[0079] More specifically, after determining the set of ambient RF sources, the serving gNB can calculate the scan angle of all signal sources in that set. The scan angle of an ambient RF source is defined as the minimum angle that allows the beam emitted from that source to cover all possible locations of BTx. In the previous example, it was indicated that the possible location range of BTx is a circle with BRx as the origin and d as the radius. The scan angle is the angle between two tangent lines passing through the point where the ambient RF source is located and tangent to this circle.

[0080] Figure 25 An example of the scanning angle of an RF source in a computing environment is given. Figure 25 In the diagram, point A represents BTx, and point B represents BRx. Assuming point D1 represents the ambient RF source, and E1 and E2 are the points of tangency between two tangent lines from point D1 to a circle with origin B and radius d, then ∠E1D1E2 is defined as the scanning angle of the ambient RF source D1, calculated using the following formula:

[0081]

[0082] If the serving gNB does not know the location of BRx, no angle calculation is performed. The serving gNB can, for example, estimate the distance between itself and BRx (denoted by d0) using the Reference Signal Received Power (RSRP) for subsequent calculations and processing. The d and d0 estimated in the previous example process can provide the possible location range of the backscattering transceiver, such as... Figure 26 As shown. With Figure 23 Similarly, Figure 26 Two possible locations (A and B) for BTx and BRx are given.

[0083] Continue to refer to Figure 1 According to one embodiment, when the electronic device 100 is operating as the primary ambient RF source, the determining unit 113 can also be configured to allocate time-frequency resources for backscatter communication. Alternatively, when the electronic device 100 is not operating as the primary ambient RF source, the control unit 115 can be configured to control the transmission of time-frequency resource allocation requests to the ambient radio frequency source.

[0084] In other words, the operating frequency band for environmental backscatter communication can be determined by the primary environmental RF source (which can be electronic device 100 or other devices). If environmental backscatter communication and cellular communication use the same frequency band, further interference cancellation procedures can be performed; if environmental backscatter communication uses additional idle frequency bands, the interference cancellation process can be omitted, and the backscatter communication process can be performed directly.

[0085] More specifically, after the serving gNB selects the environmental RF source, the primary environmental RF source receives a resource allocation request message from the serving gNB, allocates time-frequency resources for environmental backscatter communication, and determines the time and frequency band occupied by environmental backscatter communication. If environmental backscatter communication and cellular communication use the same frequency band, then the interfering signal is also on that frequency band, and the serving gNB needs to further determine the source of the interference. If environmental backscatter communication uses a different available frequency band, the serving gNB can skip the interference cancellation process.

[0086] Next, we will explain the procedures related to interference cancellation.

[0087] According to one embodiment, the determining unit 113 is further configured to determine one or more interference sources in the backscatter communication, including signal sources that interfere with the transmitting end and / or the receiving end.

[0088] More specifically, such as Figure 4 As shown, when the location of the receiver can be obtained, the determining unit 113 can identify signal sources other than ambient radio frequency sources within a first distance from the receiver as interference sources. On the other hand, when the location of the receiver cannot be obtained, the determining unit 113 can identify signal sources other than ambient radio frequency sources within a second distance from the serving base station of the receiver as interference sources.

[0089] Taking the serving base station with electronic device 100 as the receiving end as an example, based on the already determined set of environmental RF sources, the serving gNB can further determine the set of interference sources. The selection criteria for interference sources are relatively flexible. One method is to form the interference source set by removing the environmental RF sources from the candidate signal sources, as shown below:

[0090] {D k ,k=1,2,3,…}\D j Equation (4)

[0091] Among them, {D k ,k=1,2,3,…} represents all candidate signal sources, D j This indicates the selected environmental RF source.

[0092] Furthermore, the selected set of interference sources can be further adjusted by considering the received power of different signal sources at BTx. If the ambient RF source is close to BTx and its received signal power at BTx is much greater than that of other signal sources at BTx, some signal sources can be ignored, and the set of interference sources is reduced. If the ambient RF source is relatively far from BTx, the defined interference range needs to be increased, and the set of interference sources is expanded.

[0093] The above describes an example embodiment for determining the interference source. Additionally, according to one embodiment, the determining unit 113 can also determine the signal prohibition range of the interference source.

[0094] Specifically, such as Figure 5 As shown, when the location of the receiver can be obtained, the determining unit 113 can determine the signal prohibition range of the interference source based on the locations of the interference source and the receiver, as well as the distance between the transmitter and the receiver, so that the transmitter is within the determined signal prohibition range. Alternatively, when the location of the receiver cannot be obtained, the determining unit 113 can determine the signal prohibition range of the interference source based on the distance between the receiver and the base station, the distance between the transmitter and the receiver, and the locations of the interference source and the serving base station, so that the transmitter is within the determined signal prohibition range.

[0095] Taking the case where the electronic device 100 is the receiving end of the serving base station as an example, the serving gNB can calculate the forbidden scanning angle of each interference source based on the estimated distance between the transceiver and the distance from each interference source to the BRx. If the serving gNB does not know the location of the BRx, it needs to use the estimated distance between the transceiver, the estimated distance between the serving gNB and the BRx, and the distance between each interference source and the serving gNB.

[0096] The forbidden scanning angle of an interfering source is defined as the minimum angle that allows the beam emitted from the signal source to avoid all possible locations of BTx. As indicated in the previous example, the possible locations of BTx are a circle with BRx as the origin and d as the radius. Accordingly, the forbidden scanning angle of the interfering source can be the angle between two tangent lines passing through the point where the interfering source is located and tangent to this circle.

[0097] Figure 27 The document provides an example for calculating the forbidden scanning angle of an interference source. Point A represents BTx, and point B represents BRx. Assume point D1 represents a unique environmental RF source, and the point set {D2, D3, ...} represents the set of interference sources. F1 and F2 are the points of tangency between two tangent lines from point D2 to a circle with origin B and radius d. Then, ∠F1D2F2 is defined as the forbidden scanning angle of interference source D2, calculated using the following formula:

[0098]

[0099] The forbidden scanning angles of other interference sources can be calculated using this method.

[0100] The example above is based on the assumption that the serving gNB knows the location of BRx. When the serving gNB does not know the location of BRx, referring to the previous example, the possible location range of BTx is a circle with the serving gNB as the center and (d+d0+l) as the radius. The beams of all interference sources need to avoid this area. The definition and calculation of the forbidden scanning angle of the interference source can be similar.

[0101] Similarly, refer to Figure 26 This example illustrates how to calculate the forbidden scanning angle of an interfering source when the serving gNB does not know the location of BRx. Point A represents BTx, point B represents BRx, and point C represents the serving gNB. Taking interfering source D2 as an example, its forbidden scanning angle is defined as ∠α, and the calculation formula is as follows:

[0102]

[0103] The forbidden scanning angles of other interference sources can be calculated using the formulas described above.

[0104] However, it should be noted that the methods for determining and calculating interference sources and scanning prohibition angles are not limited to the examples above.

[0105] Continue to refer to Figure 1 The control unit 115 can be configured to notify or control an ambient radio frequency source to provide a radio frequency signal for backscatter communication. More specifically, when the electronic device 100 is operating as an ambient RF source, the control unit 115 can control the ambient radio frequency source to provide a radio frequency signal for backscatter communication; when the electronic device 100 is not operating as an ambient RF source, the control unit 115 can notify the ambient radio frequency source to provide a radio frequency signal for backscatter communication.

[0106] Furthermore, when the determining unit 113 determines the signal coverage area of ​​the ambient radio frequency source, the control unit 115 can perform control to notify the ambient radio frequency source of the determined signal coverage area.

[0107] Similarly, when the determining unit 113 determines the signal prohibition range of the interference source, the control unit 115 can perform control to notify the interference source of the determined signal prohibition range.

[0108] Taking the case of the serving base station with electronic device 100 as the receiving end as an example, the serving gNB can notify all selected signal sources in the two sets of the required angles, including the scanning angle of the environmental RF source and the prohibited scanning angle of the interference source, to achieve coordinated control. The environmental RF source can provide RF signals for environmental backscatter communication, while the interference source can avoid interference according to the prohibited scanning angle.

[0109] Furthermore, the serving gNB can obtain the time-frequency resource allocation messages determined by the primary environmental RF source and perform resource and beam coordination control. More specifically, the primary environmental RF source can notify each environmental RF source of the scanning angle, and the environmental RF sources can then provide RF signals to the BTx on the determined time-frequency resources for environmental backscatter communication. If there are interfering sources, the serving gNB can notify each interfering source of the prohibited scanning angle, and the interfering sources can then avoid sending beams into the environmental backscatter communication area during the determined environmental backscatter communication time.

[0110] When the serving gNB does not know the location of the BRx, environmental RF sources can broadcast RF signals. Similarly, if there are interference sources, the serving gNB can notify each interference source of the prohibited scanning angle, and all interference sources will work together to avoid signal transmission within the prohibited scanning angle.

[0111] In the above embodiments, BTx uses RF signals from environmental RF sources for energy harvesting and data transmission. By employing a cooperative interference control method, interference at BRx can be effectively reduced, thereby helping BRx to decode and obtain the required information. Figures 28 to 30 A signaling flowchart for an example implementation is provided. Figure 28 This corresponds to the case where the serving gNB and the environmental RF source are different physical entities. Figure 29 This corresponds to the case where the serving gNB and the environmental RF source are the same physical entity, and Figure 30 This corresponds to the case where the serving gNB does not know the BRx location (in which case the serving gNB is selected as the environment RF source). It should be noted that... Figures 28 to 30 The example process includes several aspects of the foregoing embodiments; however, it should be understood that the embodiments of the present invention do not necessarily need to include all of these aspects.

[0112] Furthermore, the cooperative interference control in cellular communication using ambient backscattering according to the embodiments can be extended to device-to-device direct communication (D2D communication). Taking a cooperative relay network incorporating ambient backscattering as an example, communication between the transceiver is achieved through ambient backscattering, reducing energy consumption. BTx, with its simple structure and limited power, cannot directly transmit information to a distant serving gNB. Instead, it first uploads information to BRx via ambient backscattering, and BRx then sends all collected information to the serving gNB. On the other hand, D2D communication enables direct communication between two user terminals within a certain distance, reducing the load on the serving gNB. Before direct communication between the two user terminals, the transmitting end can send a request to the serving gNB, which allocates specific time-frequency resources. Thus, D2D communication is similar to ambient backscattering communication, except that the latter is an automatic transmission method. Therefore, the embodiments of the present invention can be applied to automatic D2D communication scenarios.

[0113] The above aspects of the embodiments of this disclosure may have one or more of the following advantages: effectively reducing interference from signal sources introduced into cellular communication; enabling environmental interference avoidance when the serving gNB does not know the BRx location, thus broadening the application scope; environmental RF sources and interference sources work together to avoid interference; diverse application scenarios, adapting to different environmental RF source selection methods and time-frequency allocation methods; and environmental interference avoidance methods have low overhead.

[0114] In the foregoing description of the apparatus according to embodiments of the present invention, some processes and methods have obviously been disclosed. Next, without repeating the details described above, a description of a wireless communication method according to embodiments of the present invention will be given.

[0115] like Figure 6 As shown, a wireless communication method according to one embodiment includes step S610 of obtaining the distance between a transmitter and a receiver for backscatter communication. Furthermore, the method includes step S620 of determining one or more ambient radio frequency sources for backscatter communication based on the distance, and step S630 of notifying or controlling the ambient radio frequency sources to provide radio frequency signals for backscatter communication.

[0116] The apparatus and method described above can be implemented, for example, on the serving base station side of BRx.

[0117] Furthermore, embodiments of the present invention may also include apparatus and methods implemented on the BRx side. Next, without repeating details corresponding to those described in the foregoing embodiments, apparatus and methods for the BRx side according to embodiments of the present invention will be given.

[0118] like Figure 7As shown, the electronic device 700 for wireless communication according to this embodiment includes a processing circuit 710. The processing circuit 710 includes an estimation unit 711 and a control unit 713.

[0119] The estimation unit 711 is configured to estimate the distance between the transmitter and receiver in backscatter communication.

[0120] The control unit 713 is configured to notify the serving base station of the receiving end of the distance estimated by the estimation unit 711, and to perform backscatter communication using radio frequency signals from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the notified distance.

[0121] According to one embodiment, the estimation unit 711 is configured to perform specific backscatter communication between the receiver and the transmitter, estimating the distance between the receiver and the transmitter based on the initial signal transmission power of the receiver and the power of the reflected signal received by the receiver from the transmitter.

[0122] According to one embodiment, the control unit 713 is also configured to perform control to report the location of the receiving end to the serving base station.

[0123] Figure 8 A process example corresponding to the BRx side is shown.

[0124] like Figure 8 As shown, a wireless communication method according to one embodiment includes: step S810 of estimating the distance between a transmitter and a receiver for backscatter communication; step S820 of notifying the estimated distance to a serving base station of the receiver; and step S830 of performing backscatter communication using a radio frequency signal from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the notified distance.

[0125] Furthermore, embodiments of the present invention may also include apparatus and methods implemented on the environmental radio frequency source side. Next, without repeating details corresponding to those described in the foregoing embodiments, apparatus and methods for the environmental radio frequency source side according to embodiments of the present invention will be given.

[0126] like Figure 9 As shown, the electronic device 900 for wireless communication according to this embodiment includes a processing circuit 910. The processing circuit 910 includes a determining unit 911 and a control unit 913.

[0127] The determining unit 911 is configured to determine time-frequency resources for backscatter communication based on a resource allocation request from a communication device. The resource allocation request is sent by the communication device for an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication.

[0128] The control unit 913 is configured to control the communication device to notify the time-frequency resources determined by the determining unit 911, and to control the provision of radio frequency signals for backscatter communication.

[0129] According to one embodiment, the control unit 913 is also configured to provide radio frequency signals for backscatter communication based on indication information about signal coverage received from the communication device.

[0130] Figure 10 A process example corresponding to the method on the environmental radio frequency source side is shown.

[0131] like Figure 10 As shown, a wireless communication method according to one embodiment includes step S1010 of determining time-frequency resources for backscatter communication based on a resource allocation request from a communication device. The resource allocation request is sent by the communication device for an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication. The method further includes step S1020 of notifying the communication device of the determined time-frequency resources and step S1030 of providing a radio frequency signal for the backscatter communication.

[0132] Furthermore, embodiments of the present invention also include a computer-readable medium comprising executable instructions that, when executed by an information processing device, cause the information processing device to perform the method according to the above embodiments.

[0133] As an example, the various steps of the above method and the various components and / or units of the above apparatus can be implemented as software, firmware, hardware, or a combination thereof. When implemented via software or firmware, data can be transferred from a storage medium or network to a computer with a dedicated hardware architecture (e.g., Figure 11 The general-purpose computer 1100 shown is equipped with programs that constitute software for implementing the above methods. When various programs are installed, the computer is able to perform various functions, etc.

[0134] exist Figure 11 In this system, the arithmetic processing unit (CPU) 1101 performs various processes based on the program stored in the read-only memory (ROM) 1102 or the program loaded into the random access memory (RAM) 1103 from the storage section 1108. The RAM 1103 also stores data required as needed when the CPU 1101 performs various processes, etc. The CPU 1101, ROM 1102, and RAM 1103 are linked to each other via a bus 1104. The input / output interface 1105 is also linked to the bus 1104.

[0135] The following components are linked to the input / output interface 1105: input section 1106 (including keyboard, mouse, etc.), output section 1107 (including display, such as cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.), storage section 1108 (including hard disk, etc.), and communication section 1109 (including network interface card, such as LAN card, modem, etc.). The communication section 1109 performs communication processing via a network, such as the Internet. Drive 1110 may also be linked to the input / output interface 1105 as needed. Removable media 1111, such as disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1110 as needed, so that computer programs read from them can be installed into storage section 1108 as needed.

[0136] When the above series of processes are implemented through software, the program constituting the software is installed from a network such as the Internet or a storage medium such as removable media 1111.

[0137] Those skilled in the art will understand that such storage media are not limited to Figure 11 The illustration shows a removable medium 1111 that stores a program and is distributed separately from the device to provide the program to the user. Examples of removable media 1111 include magnetic disks (including floppy disks (registered trademark)), optical disks (including optical disc read-only memory (CD-ROM) and digital versatile disks (DVD)), magneto-optical disks (including mini-discs (MD) (registered trademark)), and semiconductor memory. Alternatively, the storage medium may be ROM 1102, a hard disk included in storage section 1108, etc., containing programs and distributed to the user along with the device containing them.

[0138] Embodiments of the present invention also relate to a program product storing machine-readable instruction code. When the instruction code is read and executed by a machine, the method described above according to embodiments of the present invention can be performed.

[0139] Accordingly, the storage medium used to carry the program product storing machine-readable instruction code is also included in the disclosure of this invention. The storage medium includes, but is not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, etc.

[0140] Embodiments of this application also relate to the following electronic devices. When used on the base station side, the electronic device can be implemented as any type of gNB or evolved Node B (eNB), such as macro eNBs and small eNBs. A small eNB can be an eNB covering a cell smaller than a macro cell, such as a pico eNB, micro eNB, and femtocell eNB. Alternatively, the electronic device can be implemented as any other type of base station, such as a NodeB and a Base Transceiver Station (BTS). The electronic device may include: a subject configured to control wireless communication (also called a base station device); and one or more remote radio heads (RRHs) located in a different location from the subject. Furthermore, the various types of terminals described below can operate as base stations by temporarily or semi-persistently performing base station functions.

[0141] When used on the user equipment side, the electronic device can be implemented as a mobile terminal (such as a smartphone, tablet PC, laptop PC, portable gaming terminal, portable / dongle-type mobile router, and digital camera device) or an in-vehicle terminal (such as a car navigation device). Furthermore, the electronic device can be a wireless communication module (such as an integrated circuit module comprising one or more chips) installed on each of the aforementioned terminals.

[0142] [Application examples of terminal devices]

[0143] Figure 12 This is a block diagram illustrating an example of a schematic configuration of a smartphone 2500 to which the technologies of this disclosure can be applied. The smartphone 2500 includes a processor 2501, a memory 2502, a storage device 2503, an external connection interface 2504, a camera device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512, one or more antenna switches 2515, one or more antennas 2516, a bus 2517, a battery 2518, and an auxiliary controller 2519.

[0144] Processor 2501 may be, for example, a CPU or a system-on-a-chip (SoC), and controls the application layer and other functions of smartphone 2500. Memory 2502 includes RAM and ROM, and stores data and programs executed by processor 2501. Storage device 2503 may include storage media such as semiconductor memory and hard disk. External connection interface 2504 is an interface for connecting external devices (such as memory cards and Universal Serial Bus (USB) devices) to smartphone 2500.

[0145] Camera device 2506 includes an image sensor (such as a charge-coupled device (CCD) and complementary metal-oxide-semiconductor (CMOS)) and generates captured images. Sensor 2507 may include a set of sensors, such as a measurement sensor, a gyroscope sensor, a geomagnetic sensor, and an accelerometer. Microphone 2508 converts sound input to smartphone 2500 into an audio signal. Input device 2509 includes, for example, a touch sensor, keypad, keyboard, buttons, or switches configured to detect touches on the screen of display device 2510 and receives operations or information input from the user. Display device 2510 includes a screen (such as a liquid crystal display (LCD) and an organic light-emitting diode (OLED) display) and displays the output image of smartphone 2500. Speaker 2511 converts the audio signal output from smartphone 2500 into sound.

[0146] The wireless communication interface 2512 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication. The wireless communication interface 2512 typically includes, for example, a baseband (BB) processor 2513 and radio frequency (RF) circuitry 2514. The BB processor 2513 can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various types of signal processing for wireless communication. Meanwhile, the RF circuitry 2514 can include, for example, mixers, filters, and amplifiers, and transmits and receives wireless signals via antenna 2516. The wireless communication interface 2512 can be a single chip module on which the BB processor 2513 and RF circuitry 2514 are integrated. Figure 12 As shown, the wireless communication interface 2512 may include multiple BB processors 2513 and multiple RF circuits 2514. Although Figure 12 An example is shown in which the wireless communication interface 2512 includes multiple BB processors 2513 and multiple RF circuits 2514, but the wireless communication interface 2512 may also include a single BB processor 2513 or a single RF circuit 2514.

[0147] In addition to cellular communication schemes, the wireless communication interface 2512 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near-field communication schemes, and wireless local area network (LAN) schemes. In this case, the wireless communication interface 2512 may include a BB processor 2513 and RF circuitry 2514 for each wireless communication scheme.

[0148] Each of the antenna switches 2515 switches the connection destination of the antenna 2516 among multiple circuits (e.g., circuits for different wireless communication schemes) included in the wireless communication interface 2512.

[0149] Each of the antennas 2516 includes one or more antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the wireless communication interface 2512 to transmit and receive wireless signals. Figure 12 As shown, the smartphone 2500 may include multiple antennas 2516. Although Figure 12 An example is shown in which the smartphone 2500 includes multiple antennas 2516, but the smartphone 2500 may also include a single antenna 2516.

[0150] Furthermore, the smartphone 2500 may include an antenna 2516 for each wireless communication scheme. In this case, the antenna switch 2515 can be omitted from the configuration of the smartphone 2500.

[0151] Bus 2517 connects processor 2501, memory 2502, storage device 2503, external connection interface 2504, camera device 2506, sensor 2507, microphone 2508, input device 2509, display device 2510, speaker 2511, wireless communication interface 2512, and auxiliary controller 2519 to each other. Battery 2518 supplies power to... Figure 11 The various blocks of the smartphone 2500 shown are powered, and the feeders are partially shown as dashed lines in the diagram. The auxiliary controller 2519 operates the minimum necessary functions of the smartphone 2500, for example, in sleep mode.

[0152] exist Figure 12 In the illustrated smartphone 2500, the transceiver of the user equipment side device according to an embodiment of the present invention can be implemented by the wireless communication interface 2512. At least a portion of the functions of the processing circuitry and / or units of the user equipment side electronic device or information processing device according to an embodiment of the present invention can also be implemented by the processor 2501 or the auxiliary controller 2519. For example, the power consumption of the battery 2518 can be reduced by having the auxiliary controller 2519 execute some of the functions of the processor 2501. Furthermore, the processor 2501 or the auxiliary controller 2519 can execute at least a portion of the functions of the processing circuitry and / or units of the user equipment side electronic device or information processing device according to an embodiment of the present invention by executing programs stored in the memory 2502 or the storage device 2503.

[0153] [Application examples of base stations]

[0154] Figure 13 This is a block diagram illustrating an example of a schematic configuration of a gNB to which the technologies of this disclosure can be applied. The gNB2300 includes a plurality of antennas 2310 and a base station device 2320. The base station device 2320 and each antenna 2310 can be connected to each other via radio frequency (RF) cables.

[0155] Each of the antennas 2310 includes one or more antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna) and is used by the base station equipment 2320 to transmit and receive wireless signals. Figure 13 As shown, the gNB 2300 may include multiple antennas 2310. For example, the multiple antennas 2310 may be compatible with multiple frequency bands used by the gNB 2300.

[0156] The base station equipment 2320 includes a controller 2321, a memory 2322, a network interface 2323, and a wireless communication interface 2325.

[0157] The controller 2321 can be, for example, a CPU or a DSP, and operates various higher-level functions of the base station equipment 2320. For example, the controller 2321 generates data packets based on data in signals processed by the wireless communication interface 2325, and transmits the generated packets via the network interface 2323. The controller 2321 can bundle data from multiple baseband processors to generate bundled packets and transmit the generated bundled packets. The controller 2321 may have logical functions that perform controls such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby gNBs or core network nodes. The memory 2322 includes RAM and ROM, and stores programs executed by the controller 2321 and various types of control data (such as terminal lists, transmission power data, and scheduling data).

[0158] Network interface 2323 is a communication interface used to connect base station equipment 2320 to core network 2324. Controller 2321 can communicate with core network nodes or other gNBs via network interface 2323. In this case, gNB 2300 and core network nodes or other gNBs can be connected to each other via logical interfaces (such as S1 and X2 interfaces). Network interface 2323 can also be a wired communication interface or a wireless communication interface for wireless backhaul. If network interface 2323 is a wireless communication interface, it can use a higher frequency band for wireless communication compared to the frequency band used by wireless communication interface 2325.

[0159] Wireless communication interface 2325 supports any cellular communication scheme (such as LTE and LTE-Advanced) and provides wireless connectivity to terminals located in the cell of gNB 2300 via antenna 2310. Wireless communication interface 2325 typically includes, for example, a BB processor 2326 and RF circuitry 2327. BB processor 2326 can perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various types of signal processing at layers such as L1, Media Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). Instead of controller 2321, BB processor 2326 may have some or all of the above-described logical functions. BB processor 2326 may be a memory storing communication control programs, or a module including a processor and associated circuitry configured to execute programs. Update programs can change the functionality of BB processor 2326. The module may be a card or blade inserted into a slot in base station equipment 2320. Alternatively, the module may be a chip mounted on a card or blade. Meanwhile, the RF circuit 2327 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2310.

[0160] like Figure 13 As shown, the wireless communication interface 2325 may include multiple BB processors 2326. For example, the multiple BB processors 2326 may be compatible with multiple frequency bands used by the gNB 2300. Figure 13 As shown, the wireless communication interface 2325 may include multiple RF circuits 2327. For example, the multiple RF circuits 2327 may be compatible with multiple antenna elements. Although Figure 13 An example is shown in which the wireless communication interface 2325 includes multiple BB processors 2326 and multiple RF circuits 2327, but the wireless communication interface 2325 may also include a single BB processor 2326 or a single RF circuit 2327.

[0161] exist Figure 13 In the gNB 2300 shown, the transceiver of the wireless communication equipment on the base station side can be implemented by the wireless communication interface 2325. At least a portion of the functions of the electronic devices on the base station side or the processing circuitry and / or individual units of the wireless communication equipment can also be implemented by the controller 2321. For example, the controller 2321 can execute at least a portion of the functions of the electronic devices on the base station side or the processing circuitry and / or individual units of the wireless communication equipment by executing a program stored in the memory 2322.

[0162] In the above description of specific embodiments of the present invention, features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0163] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0164] In the above embodiments and examples, numerical reference numerals are used to denote various steps and / or units. Those skilled in the art will understand that these reference numerals are merely for ease of description and drawing, and do not indicate their order or any other limitation.

[0165] Furthermore, the method of the present invention is not limited to being executed in the chronological order described in the specification, but may also be executed in other chronological orders, in parallel, or independently. Therefore, the execution order of the method described in this specification does not constitute a limitation on the technical scope of the present invention.

[0166] Although the invention has been disclosed above through the description of specific embodiments, it should be understood that all the embodiments and examples described above are exemplary and not restrictive. Those skilled in the art can design various modifications, improvements, or equivalents to the invention within the spirit and scope of the appended claims. These modifications, improvements, or equivalents should also be considered to be included within the protection scope of the invention.

[0167] Furthermore, embodiments of the present invention also include:

[0168] (1) An electronic device for wireless communication, comprising processing circuitry configured to:

[0169] Obtain the distance between the transmitter and receiver in backscatter communication;

[0170] Based on the distance, one or more environmental radio frequency sources are determined for the backscatter communication; and

[0171] The environmental radio frequency source is notified or controlled to provide radio frequency signals for the backscatter communication.

[0172] (2) The electronic device according to (1), wherein the distance is obtained by:

[0173] Backscatter communication is performed between the receiving end and the transmitting end. The distance between the receiving end and the transmitting end is estimated based on the initial signal transmission power of the receiving end and the power of the reflected signal received by the receiving end from the transmitting end.

[0174] (3) The electronic device according to (1), wherein determining the ambient radio frequency source includes:

[0175] If the location of the receiving end is known, based on the location of the receiving end and the distance between the transmitting end and the receiving end, one or more signal sources whose estimated received power at the transmitting end reaches a predetermined level are identified as the environmental radio frequency sources; or

[0176] If the location of the receiving end cannot be obtained, the serving base station of the receiving end shall at least be identified as the environmental radio frequency source.

[0177] (4) According to the electronic device described in (3), the processing circuit is further configured to:

[0178] If the location of the receiving end can be obtained, the signal coverage range of the environmental radio frequency source is determined based on the locations of the environmental radio frequency source and the receiving end, as well as the distance between the transmitting end and the receiving end, such that the transmitting end is within the signal coverage range; or

[0179] If the location of the receiving end cannot be obtained, estimate the distance between the receiving end and the serving base station.

[0180] (5) According to the electronic device of (4), the processing circuit is further configured to control the determination of the signal coverage range to notify the ambient radio frequency source.

[0181] (6) According to the electronic device described in (1), the processing circuit is further configured to:

[0182] Allocate time-frequency resources for the backscatter communication, or control the transmission of time-frequency resource allocation requests to the ambient radio frequency source.

[0183] (7) According to the electronic device of (1), the processing circuit is further configured to: identify one or more interference sources of backscatter communication, the interference sources including signal sources that interfere with the transmitting end and / or the receiving end.

[0184] (8) The electronic device according to (7), wherein determining the interference source includes:

[0185] If the location of the receiving end can be obtained, signal sources other than the environmental radio frequency source within a first distance from the receiving end are identified as the interference source; or

[0186] If the location of the receiving end cannot be obtained, signal sources other than the environmental radio frequency source within a second distance from the serving base station of the receiving end are identified as the interference source.

[0187] (9) According to the electronic device described in (7), the processing circuit is further configured to:

[0188] If the location of the receiving end can be obtained, the signal prohibition range of the interference source is determined based on the locations of the interference source and the receiving end, as well as the distance between the transmitting end and the receiving end, such that the transmitting end is within the determined signal prohibition range; or

[0189] If the location of the receiving end cannot be obtained, the signal prohibition range of the interference source is determined based on the distance between the receiving end and the serving base station, the distance between the transmitting end and the receiving end, and the locations of the interference source and the serving base station, so that the transmitting end is within the determined signal prohibition range.

[0190] (10) According to the electronic device of (9), the processing circuit is further configured to control the signal prohibition range to notify the interference source.

[0191] (11) The electronic device according to any one of (1)-(10), wherein the electronic device functions as a serving base station of the receiving end.

[0192] (12) A wireless communication method, comprising:

[0193] Obtain the distance between the transmitter and receiver in backscatter communication;

[0194] Based on the distance, one or more environmental radio frequency sources are determined for the backscatter communication; and

[0195] The environmental radio frequency source is notified or controlled to provide radio frequency signals for the backscatter communication.

[0196] (13) An electronic device for wireless communication, comprising processing circuitry configured to:

[0197] Estimate the distance between the transmitter and receiver in backscatter communication;

[0198] The estimated distance is communicated to the serving base station of the receiving end; and

[0199] The backscatter communication is performed using radio frequency signals from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

[0200] (14) The electronic device according to (13), wherein the estimation of the distance includes:

[0201] Backscatter communication is performed between the receiving end and the transmitting end. The distance between the receiving end and the transmitting end is estimated based on the initial signal transmission power of the receiving end and the power of the reflected signal received by the receiving end from the transmitting end.

[0202] (15) According to the electronic device of (13), the processing circuit is further configured to: perform control to report the location of the receiving end to the serving base station.

[0203] (16) A wireless communication method, comprising:

[0204] Estimate the distance between the transmitter and receiver in backscatter communication;

[0205] The estimated distance is communicated to the serving base station of the receiving end; and

[0206] The backscatter communication is performed using radio frequency signals from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

[0207] (17) An electronic device for wireless communication, comprising processing circuitry configured to:

[0208] Based on the resource allocation request from the communication device, determine the time-frequency resources used for backscatter communication;

[0209] Control is performed to notify the communication device of the determined time-frequency resources; and

[0210] Control is performed to provide radio frequency signals for the backscatter communication.

[0211] The resource allocation request is sent by the communication device to an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication.

[0212] (18) According to the electronic device of (17), the processing circuit is further configured to provide a radio frequency signal for the backscatter communication based on indication information about the signal coverage received from the communication device.

[0213] (19) A wireless communication method, comprising:

[0214] Based on the resource allocation request from the communication device, determine the time-frequency resources used for backscatter communication;

[0215] The determined time-frequency resources are notified to the communication device; and

[0216] Provide radio frequency signals for the backscatter communication.

[0217] The resource allocation request is sent by the communication device to an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication.

[0218] (20) A computer-readable medium comprising executable instructions that, when executed by an information processing device, cause the information processing device to perform the method according to any one of (12), (16) and (19).

Claims

1. An electronic device for wireless communication, comprising processing circuitry configured to: Obtain the distance between the transmitter and receiver in backscatter communication; Based on the distance, one or more environmental radio frequency sources are determined for the backscatter communication; Based on the locations of the environmental radio frequency source and the receiving end, as well as the distance between the transmitting end and the receiving end, the signal coverage range of the environmental radio frequency source is determined, such that the transmitting end is within the signal coverage range. The signal coverage range includes a scanning angle, which is the minimum angle that allows the beam emitted from the ambient radio frequency source to cover all possible locations of the transmitting end; and The notification or control of the environmental radio frequency source provides radio frequency signals for the backscatter communication based on the signal coverage area.

2. The electronic device according to claim 1, wherein, The distance was obtained in the following way: Backscatter communication is performed between the receiving end and the transmitting end. The distance between the receiving end and the transmitting end is estimated based on the initial signal transmission power of the receiving end and the power of the reflected signal received by the receiving end from the transmitting end.

3. The electronic device according to claim 1, wherein, The determination of the environmental radio frequency source includes: If the location of the receiving end is known, based on the location of the receiving end and the distance between the transmitting end and the receiving end, one or more signal sources whose estimated received power at the transmitting end reaches a predetermined level are identified as the environmental radio frequency sources; or If the location of the receiving end cannot be obtained, the serving base station of the receiving end shall at least be identified as the environmental radio frequency source.

4. The electronic device according to claim 3, wherein the processing circuit is further configured to: If the location of the receiving end cannot be obtained, estimate the distance between the receiving end and the serving base station.

5. The electronic device of claim 1, wherein the processing circuitry is further configured to: control the signal coverage area to notify the ambient radio frequency source.

6. The electronic device according to claim 1, wherein the processing circuit is further configured to: Allocate time-frequency resources for the backscatter communication, or control the transmission of time-frequency resource allocation requests to the ambient radio frequency source.

7. The electronic device of claim 1, wherein the processing circuitry is further configured to: determine one or more interference sources for backscatter communication, the interference sources including signal sources that interfere with the transmitting end and / or the receiving end.

8. The electronic device according to claim 7, wherein, The determination of the interference source includes: If the location of the receiving end can be obtained, signal sources other than the environmental radio frequency source within a first distance from the receiving end are identified as the interference source; or If the location of the receiving end cannot be obtained, the signal source other than the environmental radio frequency source within a second distance from the serving base station of the receiving end is identified as the interference source.

9. The electronic device according to claim 7, wherein the processing circuit is further configured to: If the location of the receiving end can be obtained, the signal prohibition range of the interference source is determined based on the locations of the interference source and the receiving end, as well as the distance between the transmitting end and the receiving end, such that the transmitting end is within the determined signal prohibition range; or If the location of the receiving end cannot be obtained, the signal prohibition range of the interference source is determined based on the distance between the receiving end and the serving base station of the receiving end, the distance between the transmitting end and the receiving end, and the locations of the interference source and the serving base station, so that the transmitting end is within the determined signal prohibition range.

10. The electronic device of claim 9, wherein the processing circuit is further configured to: control the signal prohibition range to notify the interference source.

11. The electronic device according to any one of claims 1 to 10, wherein, The electronic device functions as a serving base station for the receiving end.

12. A wireless communication method, comprising: Obtain the distance between the transmitter and receiver in backscatter communication; Based on the distance, one or more environmental radio frequency sources are determined for the backscatter communication; Based on the positions of the ambient radio frequency source and the receiver, and the distance between the transmitter and the receiver, the signal coverage range of the ambient radio frequency source is determined such that the transmitter is within the signal coverage range. The signal coverage range includes a scanning angle, which is the minimum angle that allows the beam emitted from the ambient radio frequency source to cover all possible positions of the transmitter. The notification or control of the environmental radio frequency source provides radio frequency signals for the backscatter communication based on the signal coverage area.

13. An electronic device for wireless communication, comprising processing circuitry configured to: Estimate the distance between the transmitter and receiver in backscatter communication; The estimated distance is communicated to the serving base station of the receiving end; and The backscatter communication is performed using radio frequency signals from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance. in, The signal coverage range of the ambient radio frequency source is determined based on the positions of the ambient radio frequency source and the receiver, as well as the distance between the transmitter and the receiver, such that the transmitter is within the signal coverage range. The signal coverage range includes a scanning angle, which is the minimum angle that allows the beam emitted from the ambient radio frequency source to cover all possible positions of the transmitter. The ambient radio frequency source provides radio frequency signals for the backscatter communication based on the signal coverage range.

14. The electronic device according to claim 13, wherein, The distance estimation includes: Backscatter communication is performed between the receiving end and the transmitting end. The distance between the receiving end and the transmitting end is estimated based on the initial signal transmission power of the receiving end and the power of the reflected signal received by the receiving end from the transmitting end.

15. The electronic device of claim 13, wherein the processing circuitry is further configured to: perform control to report the location of the receiving end to the serving base station.

16. A wireless communication method, comprising: Estimate the distance between the transmitter and receiver in backscatter communication; The estimated distance is then communicated to the serving base station of the receiving end. as well as The backscatter communication is performed using radio frequency signals from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance. The signal coverage range of the ambient radio frequency source is determined based on the positions of the ambient radio frequency source and the receiving end, as well as the distance between the transmitting end and the receiving end, such that the transmitting end is within the signal coverage range. The signal coverage range includes a scanning angle, which is the minimum angle that allows the beam emitted from the ambient radio frequency source to cover all possible positions of the transmitting end. The ambient radio frequency source provides radio frequency signals for the backscatter communication based on the signal coverage range.

17. An electronic device for wireless communication, comprising processing circuitry configured to: Based on the resource allocation request from the communication device, determine the time-frequency resources used for backscatter communication; Control is performed to notify the communication device of the determined time-frequency resources; as well as Control is performed to provide radio frequency signals for the backscatter communication based on signal coverage. The resource allocation request is sent by the communication device to an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication. The signal coverage range is determined based on the positions of the ambient radio frequency source and the receiver, as well as the distance between the transmitter and the receiver, such that the transmitter is within the signal coverage range. The signal coverage range includes a scanning angle, which is the minimum angle that allows the beam emitted from the ambient radio frequency source to cover all possible positions of the transmitter.

18. The electronic device of claim 17, wherein the processing circuitry is further configured to provide a radio frequency signal for the backscatter communication based on indication information received from the communication device regarding the signal coverage area.

19. A wireless communication method, comprising: Based on the resource allocation request from the communication device, determine the time-frequency resources used for backscatter communication; The determined time and frequency resources are notified to the communication device; as well as The radio frequency signal is provided for the backscatter communication based on the signal coverage range. The resource allocation request is sent by the communication device to an environmental radio frequency source determined based on the distance between the transmitter and receiver of the backscatter communication. The signal coverage range is determined based on the positions of the ambient radio frequency source and the receiver, as well as the distance between the transmitter and the receiver, such that the transmitter is within the signal coverage range. The signal coverage range includes a scanning angle, which is the minimum angle that allows the beam emitted from the ambient radio frequency source to cover all possible positions of the transmitter.

20. A computer-readable medium comprising executable instructions that, when executed by an information processing device, cause the information processing device to perform the method according to any one of claims 12, 16, and 19.

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