CN112449432A

CN112449432A - Electronic device, wireless communication method, and computer-readable medium

Info

Publication number: CN112449432A
Application number: CN201910822606.6A
Authority: CN
Inventors: 许威; 周少卿; 孙晨
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2021-03-05
Also published as: WO2021043050A1; CN114287111A

Abstract

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

Description

Electronic device, wireless communication method, and computer-readable medium

Technical Field

The present disclosure relates generally to the field of wireless communications, and more particularly, to an electronic device, a wireless communication method, and a computer-readable medium for wireless communication.

Background

Ambient backscattering (Ambient backscattering) enables data transmission without the need for batteries using Radio Frequency (RF) signals, such as radio, television, and mobile telephone signals. Ambient backscatter technology can be used on devices that do not have the convenience of supplying or replacing external power sources, and is expected to enable low-power and low-cost communication in internet of things (IoT) applications.

The backscatter receiving end (BRx) decodes based on energy detection, when the direct link interference of the ambient RF source is seen as noise. The method has higher requirements on the signal-to-noise ratio of the communication system and lower data transmission rate. In addition, in some application scenarios, a method of allocating additional time-frequency resources for environmental backscatter communication is adopted to suppress direct link interference. In particular, additional time-frequency resources may be allocated for backscatter communications, and an ambient RF source may provide RF signals to a backscatter transmit end (BTx) at a particular time or frequency. Alternatively, BTx may be configured with dedicated hardware to frequency shift the backscattered signal to non-overlapping frequency bands.

Disclosure of Invention

The following presents a simplified summary of embodiments of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that the following summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

According to one embodiment, an electronic device for wireless communication is provided that includes a processing circuit. The processing circuitry is configured to: obtaining the distance between a sending end and a receiving end of the backscattering communication; determining one or more ambient radio frequency sources for backscatter communications based on the distance; and informing or controlling an ambient radio frequency source to provide radio frequency signals for backscatter communications.

According to one embodiment, a wireless communication method includes: obtaining the distance between a sending end and a receiving end of the backscattering communication; determining one or more ambient radio frequency sources for backscatter communications based on the distance; and informing or controlling an ambient radio frequency source to provide radio frequency signals for backscatter communications.

According to one embodiment, an electronic device for wireless communication is provided that includes a processing circuit. The processing circuitry is configured to: estimating the distance between a transmitting end and a receiving end of the backscattering communication; informing a service base station of a receiving end of the estimated distance; and performing backscatter communications using a radio frequency signal from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

According to one embodiment, a wireless communication method includes: estimating the distance between a transmitting end and a receiving end of the backscattering communication; informing a service base station of a receiving end of the estimated distance; and performing backscatter communications using a radio frequency signal from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

According to one embodiment, an electronic device for wireless communication is provided that includes a processing circuit. The processing circuitry is configured to: determining time-frequency resources for backscatter communications based on a resource allocation request from a communication device; controlling to notify the determined time-frequency resource to the communication device; and control to provide a radio frequency signal for the backscatter communications. The resource allocation request is transmitted by the communication device for an ambient radio frequency source determined based on a distance between a transmitting end and a receiving end of the backscatter communication.

According to one embodiment, a wireless communication method includes: determining time-frequency resources for backscatter communications based on a resource allocation request from a communication device; notifying the communication device of the determined time-frequency resources; and providing the radio frequency signal for backscatter communications. The resource allocation request is transmitted by the communication device for an ambient radio frequency source determined based on a distance between a transmitting end and a receiving end of the backscatter communication.

The disclosed embodiments are advantageous for improving the quality of backscatter communications.

Drawings

The invention may be better understood by referring to the following description in conjunction with the accompanying drawings, in which like reference numerals are used throughout the figures to indicate like or similar parts. The accompanying drawings, which are incorporated in and form a part of this specification, illustrate preferred embodiments of the present invention and, together with the detailed description, serve to further explain the principles and advantages of the invention. In the drawings:

fig. 1 is a block diagram showing a configuration example of an electronic apparatus for wireless communication according to an embodiment of the present invention;

FIG. 2 illustrates an example process of a determination process of an ambient radio frequency source;

FIG. 3 illustrates an example process of a determination process of signal coverage of an ambient radio frequency source;

FIG. 4 illustrates an example process of determination processing of an interference source;

fig. 5 shows an example procedure of a determination process of a signal inhibition range of an interference source;

fig. 6 is a flowchart illustrating an example of a process of a wireless communication method according to an embodiment of the present invention;

fig. 7 is a block diagram showing a configuration example of an electronic apparatus for wireless communication according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention;

fig. 9 is a block diagram showing a configuration example of an electronic apparatus for wireless communication according to an embodiment of the present invention;

fig. 10 is a flowchart illustrating a process example of a wireless communication method according to an embodiment of the present invention;

FIG. 11 is a block diagram illustrating an exemplary architecture of a computer for implementing the methods and apparatus of the present disclosure;

fig. 12 is a block diagram showing an example of a schematic configuration of a smartphone to which the technique of the present disclosure may be applied;

fig. 13 is a block diagram showing an example of a schematic configuration of a gNB (base station) to which the technique of the present disclosure can be applied;

FIG. 14 is a schematic diagram illustrating interference in the case where the ambient RF source and BRx are different physical entities;

FIG. 15 is a schematic diagram illustrating interference in the case where the ambient RF source and BRx are the same physical entity;

fig. 16 is a diagram showing a backscatter communication procedure when estimating a distance between transceiving ends;

fig. 17 shows an example of an application scenario of a cooperative relay network incorporating backscattering;

FIG. 18 illustrates a specific example of the example application scenario illustrated in FIG. 17;

fig. 19 shows an example of an application scenario for a homogeneous multi-cell network involving short-range backscattering;

fig. 20 shows an example of an application scenario for a homogeneous multi-cell network involving long-range backscattering;

FIG. 21 shows an example of an application scenario involving a short-range backscatter heterogeneous ultra-dense networking;

FIG. 22 shows an example of an application scenario involving a heterogeneous ultra-dense network of long-range backscatter;

FIG. 23 is a schematic diagram illustrating a planar geometric model of a cellular communication system incorporating backscatter;

FIG. 24 shows an example of an application scenario with two ambient RF sources;

FIG. 25 is a schematic diagram illustrating an example manner of computing scan angles of ambient RF sources;

fig. 26 is a diagram for explaining a plane geometry model when the BRx position is unknown to the serving base station;

FIG. 27 is a diagram for explaining an example manner of calculating a scan inhibit angle of an interference source;

fig. 28 is a signaling flow diagram for illustrating an example of a communication process in the case where the serving base station and the ambient RF source are different physical entities;

fig. 29 is a signaling flow diagram for explaining an example of a communication procedure in a case where a serving base station and an ambient RF source are the same physical entity; and

fig. 30 is a signaling flow diagram for explaining an example of a communication procedure in a case where the serving base station does not know the BRx position.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings. Elements and features depicted in one drawing or one 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 the figures and description omit representation and description of components and processes that are not relevant to the present invention and that are known to those of ordinary skill in the art for the sake of clarity.

As shown in fig. 1, the electronic device 100 for wireless communication according to the present embodiment includes a processing circuit 110. The processing circuit 110 may be implemented, for example, as a particular chip, chipset, or Central Processing Unit (CPU), etc.

The processing circuit 110 includes an obtaining unit 111, a determining unit 113, and a control unit 115. It is noted that although the obtaining unit 111, the determining unit 113 and the control unit 115 are shown in the figures as functional blocks, it is to be understood that the functions of the units may also be implemented by the processing circuitry as a whole, and not necessarily by separate actual components in the processing circuitry. In addition, although the processing circuit is illustrated as one block in the drawings, the electronic apparatus may include a plurality of processing circuits, and functions of the units may be distributed into the plurality of processing circuits so that the plurality of processing circuits cooperatively operate to perform the functions.

Before further describing the present embodiment, a brief explanation of the transmitting end, receiving end, ambient RF sources, and interference sources of the backscatter communications will first be provided.

Cellular communication systems involving ambient backscattering can be broadly divided into two categories: one is that the ambient RF source and BRx are different physical nodes, and the other is that both are the same physical node. The block diagrams of these two types of systems are shown in fig. 14 and fig. 15, respectively. BTx, which may be an IoT terminal or tag, harvests energy from RF signals provided by surrounding signal sources, drives internal circuitry, modulates symbol information to be transmitted onto the received signal, and reflects it to BRx. BRx may be a relay or a tag that needs to decode valid symbol information from a received signal with some interference. The ambient RF source, which may be a relay, a small cell Access Point (AP), or a gNB, transmits RF signals that provide energy for BTx to conduct ambient backscatter communications. The interferer may also be a relay, small cell AP or gNB, which transmits RF signals that interfere with ambient backscatter communications. Ambient backscatter communication means that BTx uses the existing RF signal in the surrounding environment to collect energy to drive internal circuitry, and reflects the modulated signal to BRx for information transfer (as shown by the implementation lines in fig. 14 and 15).

Further, as shown in fig. 14 and 15, the interference signals can be roughly classified into the following three categories: interference from ambient RF sources to BRx; interference from interference sources to BTx; interference from interference sources to BRx. The environmental RF source may be a relay, a gNB, or a small cell AP (which may be selected by the serving gNB of BRx), and the interference source may be a gNB or a small cell AP (which may be determined by the serving gNB).

An example of an application of a cellular communication system involving ambient backscatter is briefly described below with reference to fig. 17 to 22.

Fig. 17 is a cooperative relaying network with ambient backscatter. The relays are ambient RF sources and the other signal sources are interference sources.

Fig. 18 gives a more specific example of a cooperative relaying network involving ambient backscatter. The limitations of the IoT terminal (as BTx) in power and hardware and the long distance between it and the serving gNB make it difficult to communicate directly with the serving gNB. As shown in fig. 18, three IoT terminals collect information with sensors and upload to the drone by backscatter (as BRx). And the unmanned aerial vehicle receives the information sent by all the IoT terminals and forwards the information to the service gNB.

Fig. 19 and 20 show homogeneous multi-cell networks with short-range backscatter and long-range backscatter, respectively. The serving gbb may select an ambient RF source, while the remaining signal sources within a certain range may be determined to be interference sources. BRx located in different signal source coverage areas are affected by different interference.

Fig. 21 and 22 show heterogeneous ultra-dense networking with short-range backscattering and long-range backscattering, respectively, which are different from fig. 19 and 20 in that the structure and signal source distribution of cells in the heterogeneous ultra-dense networking are more complicated.

Referring back to fig. 1, the electronic device 100 according to the present embodiment may operate as a serving base station of a receiving end, for example, although the invention is not limited thereto.

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

According to one embodiment, the obtaining unit 111 obtains the distance between the transmitting end and the receiving end by: and carrying out specific backscattering communication between the receiving end and the transmitting end, and estimating the distance between the receiving end and the transmitting end according to the initial signal transmitting power of the receiving end and the power of a reflected signal received by the receiving end from the transmitting end.

Fig. 16 shows an example of a specific backscatter communication process performed when BRx performs distance estimation. In this example, BRx first broadcast power is P₁The RF signal of (1); then, BTx collects energy from the RF signal and reflects the symbol information "1" to BRx; assuming that the distance between the backscatter transceiving ends is much smaller than the distance between the signal source and BTx, the interfering signal of the signal source is ignored when BRx performs the distance estimation.

The received signal power of BTx can be expressed as

Wherein G is_T(G_R) Denotes the transmit (or receive) antenna gain of BRx (or BTx), c denotes the speed of light, f_cRepresenting the carrier frequency of the RF signal and d representing the distance between the transceiving ends that needs to be estimated.

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.

Thus, the distance between the backscatter transceiving ends can be represented by the following equation (1):

and the BRx sends the estimated distance to the service gNB accessed by the BRx for subsequent calculation.

It should be noted that the above distance determination is exemplary and not limiting.

With continued reference to fig. 1, the determination unit 113 is configured to determine one or more ambient radio frequency sources for backscatter communication based on the distances obtained by the obtaining unit 111.

As shown in fig. 2, according to an embodiment, in the case where the position of the receiving end can be obtained (the position of the terminal can be obtained using various ways, for example, an observed time difference of arrival (OTDOA)), the determining unit 113 may determine one or more signal sources, for which the estimated received power at the transmitting end reaches a predetermined level, as the ambient radio frequency source based on the position of the receiving end and the distance between the transmitting end and the receiving end. On the other hand, in the case where the position of the receiving end cannot be obtained, the determining unit 113 may determine at least the serving base station of the receiving end as the ambient radio frequency source.

Taking the case where the electronic device 100 operates as a serving base station of the receiving end as an example, the serving gNB of BRx may compare the received power of each neighboring signal source arriving at BTx. To ensure the quality of the ambient backscatter communications, the serving gbb may determine the set of ambient RF sources based on the transmit power of each signal source and the distance of the signal source to BTx. If the serving gNB does not know the location of the BRx, it selects itself and nearby signal sources (in the case where multiple ambient RF sources are required) as ambient RF sources.

More specifically, the serving gNB may compare the received power at BTx for each neighboring signal source. A planar geometric model of a cellular communication system incorporating ambient backscatter is shown in figure 23. If the serving gNB knows the location of BRx and has obtained the distance between the backscatter transmit and receive ends, BTx may be a point on a circle with BRx as the origin and d as the radius. The positions (a) where two BTx may be located are given in fig. 23, respectively. Assuming that the interference range at BTx is defined as l (1 > d), all signal sources located within a circle with BRx as origin and (d + l) as radius can be ringsAmbient RF sources and interference sources. Assuming that the serving gNB knows the location and transmission power of each alternative signal source, the ith neighboring signal source D_iThe received power at BTx is expressed as

Wherein, P_DiIs D_iTransmission power of G_Di(G_A) Is D_i(BTx) transmitting (receiving) antenna gain, r_iIs a signal source D_iAnd BRx.

To achieve optimal ambient backscatter communication quality, the source that maximizes received power at BTx is selected as the primary ambient RF source, using D_jIt is shown that, among others,

the serving gNB may then send a configuration message to the primary environment RF source requesting that the signal source determine a time-frequency resource allocation (as explained in the embodiments below).

The above procedure is based on the assumption that the serving gbb knows the BRx location. The following describes the case where the serving gNB does not know the BRx location, where the BTx possible location area range is larger. Assuming that the interference range at BTx is given, it is centered around serving gNB, (d + d)₀+ l) all signal sources in a circle with a radius may be alternatives to ambient RF sources and interference sources. Since the serving gNB has the greatest probability of covering BTx, it may choose itself as the primary ambient RF source.

If only one ambient RF source is needed, there is only one element D in the set of ambient RF sources_j(ii) a And if multiple ambient RF sources are required to work together, the selected D_jSome signal sources in its vicinity are added to the ambient RF source set in turn according to the maximum received power criterion until the required number is reached.

Regarding the selection of serving gNB and ambient RF sources, the selection requirement of serving gNB is that BRx be within the coverage area of the source so that serving gNB can obtain the location of BRx or estimate its distance from BRx and can communicate between the two. The chosen criterion for the ambient RF source is that the received power at BTx is the greatest, since a larger received power at BTx means more energy is collected, and the power of the reflected signal is higher, resulting in a higher quality of the backscattered communication. Thus, the serving gbb and the ambient RF source may be different physical nodes or may be the same physical node.

Incidentally, although only a single ambient RF source is typically supported in current ambient backscatter technology, it is also possible to support multiple ambient RF sources working together. Taking the application scenario of heterogeneous ultra-dense networking as an example, a case with two ambient RF sources is given in fig. 24. AP (Access Point)₁And AP₂The RF signals are provided to BTx in common.

Selected embodiments of ambient radio sources are described above. Furthermore, according to an embodiment, the determining unit 113 may also determine the signal coverage of the ambient radio frequency source.

Specifically, as shown in fig. 3, in the case that the position of the receiving end can be obtained, the determining unit 113 may determine the signal coverage of the ambient radio frequency source based on the positions of the ambient radio frequency source and the receiving end and the distance between the transmitting end and the receiving end, so that the transmitting end is within the signal coverage. On the other hand, in the case where the position of the receiving end cannot be obtained, the determination unit 113 may estimate the distance between the receiving end and the serving base station.

Still taking the case where the electronic device 100 operates as a serving base station of the receiving end as an example, the serving gNB may collect two distance data, including the obtained distance between the transceiving ends and the distance from each ambient RF source to BRx, for calculating the scanning angles of all signal sources in the ambient RF source set. If the serving gNB does not know the location of BRx, then no angle calculation is performed, but rather the distance between the serving gNB and BRx is estimated.

More specifically, after determining the set of ambient RF sources, the serving gNB may calculate the scan angles for all signal sources in the set. The scan angle of the ambient RF source is defined as the minimum angle that enables the beam emanating from the source to cover all possible positions of BTx. It has been pointed out in the previous example that the range of possible positions for BTx is a circle with BRx as the origin and d as the radius, and that the scan angle is the angle between two tangent lines to the circle passing through the point where the ambient RF source is located.

FIG. 25 gives one example of a scan angle of a computing environment RF source. In fig. 25, point a represents BTx and point B represents BRx. Assumed point D₁Representing ambient RF sources, E₁And E₂Is from point D₁To the tangent point of two tangents of a circle with B as the origin and d as the radius, then E₁D₁E₂Is defined as an ambient RF source D₁The calculation formula is as follows:

for the case where the serving gNB does not know the BRx location, no angle calculation is performed. The serving gNB can estimate the distance between itself and BRx (with d), for example, using Reference Signal Received Power (RSRP)₀Representation) for subsequent computation and processing. D and d estimated from the previous example procedure₀A range of possible location areas of the backscatter transceiving end can be obtained as shown in fig. 26. Similarly to fig. 23, fig. 26 shows two possible positions (a and B) of BTx and BRx.

With continued reference to fig. 1, according to one embodiment, in case the electronic device 100 is operating as a primary ambient RF source, the determination unit 113 may further be configured to allocate time-frequency resources for backscatter communication. Alternatively, in case the electronic device 100 does not operate as a primary ambient RF source, the control unit 115 may be configured to control to transmit a request for allocation of time-frequency resource resources to the ambient RF source.

In other words, the operating frequency band of ambient backscatter communications may be determined by the primary ambient RF source (which may be electronic device 100 or other device). If the environmental backscatter communication and the cellular communication use the same frequency band, a further interference cancellation procedure may be performed; if the environment backscatter uses additional free frequency bands, the interference cancellation process can be omitted and the backscatter communication process can be performed directly.

More specifically, after the serving gNB selects the environmental RF source, the main environmental RF source receives the resource allocation request message sent by the serving gNB, allocates time-frequency resources for environmental backscatter communication, and determines the time occupied by the environmental backscatter communication and the frequency band used by the environmental backscatter communication, respectively. If the environmental backscatter communication and the cellular communication use the same frequency band, and the interfering signal is on that band, then the serving gNB needs to further determine the source of the interference. The serving gbb may skip the interference cancellation procedure if the ambient backscatter communication uses an otherwise idle frequency band.

Next, a process related to interference cancellation will be described.

According to an embodiment, the determining unit 113 is further configured to determine one or more interference sources of the backscatter communication, the interference sources comprising signal sources generating interference to the transmitting end and/or the receiving end.

More specifically, as shown in fig. 4, in a case where the position of the receiving end can be obtained, the determining unit 113 may determine a signal source other than the ambient radio frequency source within a first distance from the receiving end as the interference source. On the other hand, in the case where the location of the receiving end cannot be obtained, the determining unit 113 may regard a signal source other than the ambient radio frequency source within the second distance from the serving base station of the receiving end as an interference source.

Still taking the case where the electronic device 100 operates as a serving base station for the receiving end as an example, the serving gNB may further determine the set of interference sources on the basis that the set of ambient RF sources has been determined. The selection criteria of the interference sources are relatively flexible, and one of them is that the signal sources left after removing the environmental RF source from the alternative signal sources form an interference source set, which is expressed as follows:

{D_k，k＝1，2，3，…}\D_jin the formula (4)

Wherein, { D_kK-1, 2, 3, … represents all alternative signal sources, D_jIndicating the selected ambient RF source.

Furthermore, the selected set of interferers may be further adjusted if the received power at BTx for different signal sources is taken into account. If the ambient RF source is closer to BTx and its signal received power at BTx is much higher than other signal sources at BTx, then some signal sources can be ignored and the set of interfering sources is reduced. If the ambient RF source is relatively far away from BTx, the defined interference range needs to be increased and the set of interference sources is expanded.

Example embodiments of the determination of the interference source are described above. In addition, according to one embodiment, the determination unit 113 may also determine a signal inhibition range of the interference source.

Specifically, as shown in fig. 5, in the case where the position of the receiving end can be obtained, the determining unit 113 may determine the signal inhibition range of the interference source based on the positions of the interference source and the receiving end and the distance between the transmitting end and the receiving end such that the transmitting end is within the determined signal inhibition range. As another name, in the case where the position of the receiving end cannot be obtained, the determining unit 113 may determine the signal inhibition range of the interference source based on the distance between the receiving end and the base station, the distance between the transmitting end and the receiving end, and the positions of the interference source and the serving base station such that the transmitting end is within the determined signal inhibition range.

Still taking the case that the electronic device 100 operates as a serving base station of the receiving end as an example, the serving gNB may calculate the scan-prohibited angle of each interference source according to the estimated distance between the transceiving ends and the distance from each interference source to BRx. If the serving gNB does not know the location of BRx, then the estimated distance between the transceiving ends, the estimated distance between the serving gNB and BRx, and the distance between each interferer and the serving gNB need to be used.

The forbidden scan angle of an interferer is defined as the minimum angle that enables the beam emanating from that signal source to avoid all possible positions of BTx. As already indicated in the previous example, the BTx possible location range is a circle with BRx as the origin and d as the radius. Accordingly, the forbidden scan angle of the interferer may be the angle between two tangent lines tangent to the circle through the point where the interferer is located.

An example of calculating the forbidden scan angle for an interferer is given in fig. 27. Point a represents BTx and point B represents BRx. Assumed point D₁Representing uniquenessAmbient RF source of (1), point set { D }₂,D₃… represents the set of interferers. F₁And F₂Is from point D₂To the tangent point of two tangents of a circle with B as the origin and d as the radius, F₁D₂F₂Is defined as the interference source D₂The calculation formula of (2) is as follows:

the prohibited scan angles of other respective interference sources can be calculated in this manner.

The above example is based on the assumption that the serving gNB knows the BRx location. When the serving gNB does not know the BRx location, referring to the foregoing example, the range of possible BTx locations is centered around the serving gNB, (d + d)₀+ l) is a circle of radius that all interfering source beams need to avoid. The definition and calculation of the forbidden scan angle of the interferer may be similar.

Likewise, one example of calculating the prohibited scan angle of the interference source when the serving gbb does not know the BRx location is described with reference to fig. 26. Point a represents BTx, point B represents BRx, and point C represents serving gNB. By interference source D₂For example, the forbidden scan angle is defined as ≈ α, and the calculation formula is as follows:

the scan-prohibited angles of the other respective interference sources can be calculated by the above formula.

However, it should be noted that the determination and calculation manner of the interference source and the scan inhibition angle are not limited to the above example.

With continued reference to fig. 1, the control unit 115 may be configured to notify or control an ambient radio frequency source to provide a radio frequency signal for backscatter communication. More specifically, in case the electronic device 100 operates as an ambient RF source, the control unit 115 may control the ambient RF source to provide a radio frequency signal for the backscatter communication; in the event that the electronic device 100 is not operating as an ambient RF source, the control unit 115 may notify the ambient RF source to provide a radio frequency signal for backscatter communications.

Further, in the case where the determination unit 113 determines the signal coverage of the ambient radio frequency source, the control unit 115 may control to notify the ambient radio frequency source of the determined signal coverage.

Similarly, in a case where the determination unit 113 determines the signal inhibition range of the interference source, the control unit 115 may control to notify the determined signal inhibition range to the interference source.

Still taking the case that the electronic device 100 operates as a serving base station of the receiving end as an example, the serving gNB may respectively notify all signal sources selected in the two sets of the required angles, including the scanning angle of the environmental RF source and the scan-prohibited angle of the interference source, to implement the coordination control. The ambient RF source may provide an RF signal for ambient backscatter communications, while the interferer may avoid interference according to the prohibited scan angle.

In addition, the serving gbb may obtain the time-frequency resource allocation message determined by the main environment RF source, and perform resource and beam coordination control. More specifically, the master ambient RF source may inform the respective ambient RF sources of the scan angle, from which the ambient RF sources provide RF signals to BTx for ambient backscatter communications on the determined time-frequency resources. If there is an interferer, the serving gbb may notify each interferer of the scan prohibited angle, whereupon the interferer refrains from transmitting beams to the ambient backscatter communication region for the determined ambient backscatter communication occupancy time.

When the serving gbb does not know the location of BRx, the ambient RF source may broadcast RF signals. Likewise, if there is an interferer, the serving gNB may notify each interferer of the scan-prohibited angle, and all interferers work together to avoid prohibiting signal transmission within the scan angle.

In the above embodiment, BTx uses RF signals from ambient RF sources for energy acquisition and data transmission, and by using a cooperative interference control party, interference at BRx can be effectively reduced, thereby facilitating BRx decoding to obtain required information. Fig. 28-30 present signaling flow diagrams in example embodiments. Fig. 28 corresponds to a case where the serving gbb and the ambient RF source are different physical entities, fig. 29 corresponds to a case where the serving gbb and the ambient RF source are the same physical entity, and fig. 30 corresponds to a case where the serving gbb does not know the BRx location (in this case, the serving gbb is selected as the ambient RF source). It is noted that the example processes of fig. 28-30 include aspects of the foregoing embodiments, however, it should be understood that embodiments of the invention need not include all of these aspects.

Furthermore, cooperative interference control in cellular communication for introducing ambient backscatter according to embodiments may be extended to apply to device-to-device direct communication (D2D communication). Taking a cooperative relay network including environment backscattering as an example, the communication between the transmitting and receiving ends is realized in an environment backscattering mode, so that the energy consumption is reduced. BTx has a simple structure and limited power, and cannot directly transmit information to a serving gbb at a long distance, but uploads the information to BRx by environmental backscattering, and BRx then sends all the collected information to the serving gbb. On the other hand, D2D communication realizes that two user terminals within a certain distance directly communicate, reducing the load of serving the gNB. Before two user terminals directly communicate, a sending end may send a request to a serving gNB, and the serving gNB allocates a specific time-frequency resource. Thus, D2D communication is similar to ambient backscatter communication, but the latter is an automatic transmission mode. Therefore, the embodiment of the invention can be applied to an automatic D2D communication scene.

The above aspects of embodiments of the present disclosure may have one or more of the following advantages: interference from a signal source introduced in cellular communication is effectively reduced; the environmental interference avoidance under the condition that the serving gNB does not know the BRx position can be realized, and the application range is widened; the environment RF source and the interference source work cooperatively to avoid interference; the application scenes are various, and the method is suitable for different environmental RF source selection modes and time-frequency distribution modes; the environmental interference avoidance method has lower overhead.

In the foregoing description of the apparatus according to embodiments of the invention, it is apparent that certain procedures and methods are also disclosed. Next, a description will be given of a wireless communication method according to an embodiment of the present invention without repeating the details described above.

As shown in fig. 6, the wireless communication method according to one embodiment includes a step S610 of obtaining a distance between a transmitting end and a receiving end of backscatter communication. In addition, the method includes a step S620 of determining one or more ambient radio sources for backscatter communications based on the distance, and a step S630 of notifying or controlling the ambient radio sources to provide radio frequency signals for backscatter communications.

The apparatus and methods of the above embodiments may be implemented, for example, on the serving base station side of BRx.

In addition, the embodiment of the invention also comprises a device and a method for realizing the BRx side. Next, the apparatus and method for the BRx side according to the embodiments of the present invention are given without repeating the details corresponding to those described in the foregoing embodiments.

As shown in fig. 7, the electronic device 700 for wireless communication according to the present embodiment includes a processing circuit 710. The processing circuit 710 includes an estimation unit 711 and a control unit 713.

The estimation unit 711 is configured to estimate a distance between a transmitting end and a receiving end of the backscatter communication.

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 a radio frequency signal from an ambient radio frequency source determined based on the notified distance.

According to one embodiment, the estimation unit 711 is configured to perform specific backscatter communication between the receiving end and the transmitting end, and estimate the distance between the receiving end and the transmitting end according to 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.

According to one embodiment, the control unit 713 is further configured to control to report the position of the receiving end to the serving base station.

Fig. 8 shows a process example of a method corresponding to the BRx side.

As shown in fig. 8, a wireless communication method according to one embodiment includes: a step S810 of estimating a distance between a transmitting end and a receiving end of the backscatter communication; a step S820 of notifying the estimated distance to the serving base station of the receiving end; and a 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.

In addition, the embodiment of the invention also comprises a device and a method which are realized on the radio frequency source side of the environment. Next, the apparatus and method for the ambient radio frequency source side according to an embodiment of the present invention will be given without repeating details corresponding to those described in the foregoing embodiment.

As shown in fig. 9, the electronic device 900 for wireless communication according to the present embodiment includes a processing circuit 910. The processing circuit 910 comprises a determining unit 911 and a control unit 913.

The determination 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 transmitted by the communication device for an ambient radio frequency source determined based on a distance between a transmitting end and a receiving end of the backscatter communication.

The control unit 913 is configured to control to inform the communication device of the time-frequency resources determined by the determination unit 911 and to control to provide radio frequency signals for backscatter communication.

According to an embodiment, the control unit 913 is further configured to provide the radio frequency signal for the backscatter communication based on the indication information about the signal coverage received from the communication device.

Fig. 10 shows a process example of a method corresponding to the ambient radio frequency source side.

As shown in fig. 10, a wireless communication method according to one embodiment includes a 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 transmitted by the communication device for an ambient radio frequency source determined based on a distance between a transmitting end and a receiving end of the backscatter communication. The method further comprises a step S1020 of informing the communication device about the determined time-frequency resources and a step S1030 of providing radio frequency signals for backscatter communication.

Furthermore, embodiments of the present invention also include computer-readable media that include executable instructions that, when executed by an information processing device, cause the information processing device to perform methods according to the above-described embodiments.

By way of example, the various steps of the above-described methods and the various constituent modules and/or units of the above-described apparatus may be implemented as software, firmware, hardware, or a combination thereof. In the case of implementation by software or firmware, a program constituting software for implementing the above method may be installed from a storage medium or a network to a computer (for example, a general-purpose computer 1100 shown in fig. 11) having a dedicated hardware configuration, and the computer may be capable of executing various functions and the like when various programs are installed.

In fig. 11, an arithmetic processing unit (i.e., CPU)1101 performs various processes in accordance with a program stored in a Read Only Memory (ROM)1102 or a program loaded from a storage section 1108 to a Random Access Memory (RAM) 1103. In the RAM 1103, data necessary when the CPU 1101 executes various processes and the like is also stored as necessary. The CPU 1101, ROM 1102, and RAM 1103 are linked to each other via a bus 1104. Input/output interface 1105 is also linked to bus 1104.

The following components are linked to the input/output interface 1105: an input section 1106 (including a keyboard, a mouse, and the like), an output section 1107 (including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker and the like), a storage section 1108 (including a hard disk and the like), a communication section 1109 (including a network interface card such as a LAN card, a modem, and the like). The communication section 1109 performs communication processing via a network such as the internet. The driver 1110 may also be linked to the input/output interface 1105 as needed. A removable medium 1111 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 1110 as necessary, so that a computer program read out therefrom is installed into the storage section 1108 as necessary.

In the case where the above-described series of processes is realized by software, a program constituting the software is installed from a network such as the internet or a storage medium such as the removable medium 1111.

It should be understood by those skilled in the art that such a storage medium is not limited to the removable medium 1111 shown in fig. 11, in which the program is stored, distributed separately from the apparatus to provide the program to the user. Examples of the removable medium 1111 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disc read only memory (CD-ROM) and a Digital Versatile Disc (DVD)), a magneto-optical disk (including a Mini Disk (MD) (registered trademark)), and a semiconductor memory. Alternatively, the storage medium may be the ROM 1102, a hard disk included in the storage section 1108, or the like, in which programs are stored and which are distributed to users together with the device including them.

Embodiments of the present invention also relate to a program product having machine-readable instruction code stored thereon. The instruction codes are read by a machine and can execute the method according to the embodiment of the invention when being executed.

Accordingly, a storage medium carrying the above-described program product having machine-readable instruction code stored thereon is also included in the present disclosure. Including, but not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

Embodiments of the present application also relate to the following electronic devices. In the case where the electronic device is used on the base station side, the electronic device may be implemented as any type of gNB or evolved node b (eNB), such as a macro eNB and a small eNB. The small eNB may be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. Alternatively, the electronic device may 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 main body (also referred to as a base station apparatus) configured to control wireless communication; and one or more Remote Radio Heads (RRHs) disposed at a different place from the main body. In addition, various types of terminals, which will be described below, can each operate as a base station by temporarily or semi-persistently performing a base station function.

In the case where the electronic apparatus is used on the user equipment side, it may be implemented as a mobile terminal such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/cryptographic dog-type mobile router, and a digital camera, or a vehicle-mounted terminal such as a car navigation apparatus. Further, the electronic device may be a wireless communication module (such as an integrated circuit module including a single or a plurality of dies) mounted on each of the above-described terminals.

[ application example for terminal device ]

Fig. 12 is a block diagram showing an example of a schematic configuration of a smartphone 2500 to which the technology of the present disclosure can be applied. The smartphone 2500 includes a processor 2501, memory 2502, storage 2503, external connection interface 2504, imaging device 2506, sensors 2507, microphone 2508, input device 2509, display device 2510, speaker 2511, wireless communication interface 2512, one or more antenna switches 2515, one or more antennas 2516, bus 2517, battery 2518, and auxiliary controller 2519.

The processor 2501 may be, for example, a CPU or a system on a chip (SoC), and controls functions of an application layer and another layer of the smartphone 2500. The memory 2502 includes a RAM and a ROM, and stores data and programs executed by the processor 2501. The storage 2503 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 2504 is an interface for connecting external devices such as a memory card and a Universal Serial Bus (USB) device to the smartphone 2500.

The image pickup device 2506 includes an image sensor such as a Charge Coupled Device (CCD) and a Complementary Metal Oxide Semiconductor (CMOS), and generates a captured image. The sensors 2507 may include a set of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 2508 converts sound input to the smartphone 2500 into an audio signal. The input device 2509 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 2510, and receives an operation or information input from a user. The display device 2510 includes a screen, such as a Liquid Crystal Display (LCD) and an Organic Light Emitting Diode (OLED) display, and displays an output image of the smart phone 2500. The speaker 2511 converts an audio signal output from the smartphone 2500 into sound.

Wireless communication interface 2512 supports any cellular communication scheme (such as LTE and LTE-advanced) and performs wireless communication. Wireless communication interface 2512 may generally include, 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 perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 2514 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 2516. Wireless communication interface 2512 may be a one chip module with BB processor 2513 and RF circuitry 2514 integrated thereon. As shown in fig. 12, wireless communication interface 2512 may include a plurality of BB processors 2513 and a plurality of RF circuits 2514. Although fig. 12 shows an example in which wireless communication interface 2512 includes multiple BB processors 2513 and multiple RF circuits 2514, wireless communication interface 2512 may also include a single BB processor 2513 or a single RF circuit 2514.

Further, wireless communication interface 2512 may support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near field communication scheme, and a wireless Local Area Network (LAN) scheme, in addition to the cellular communication scheme. In this case, wireless communication interface 2512 may include BB processor 2513 and RF circuitry 2514 for each wireless communication scheme.

Each of the antenna switches 2515 switches a connection destination of the antenna 2516 between a plurality of circuits (for example, circuits for different wireless communication schemes) included in the wireless communication interface 2512.

Each of the antennas 2516 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for wireless communication interface 2512 to transmit and receive wireless signals. As shown in fig. 12, the smartphone 2500 may include multiple antennas 2516. Although fig. 12 shows an example in which the smartphone 2500 includes multiple antennas 2516, the smartphone 2500 may also include a single antenna 2516.

Further, the smartphone 2500 may include an antenna 2516 for each wireless communication scheme. In this case, the antenna switch 2515 may be omitted from the configuration of the smart phone 2500.

The bus 2517 connects the processor 2501, the memory 2502, the storage device 2503, the external connection interface 2504, the image pickup device 2506, the sensor 2507, the microphone 2508, the input device 2509, the display device 2510, the speaker 2511, the wireless communication interface 2512, and the auxiliary controller 2519 to each other. The battery 2518 provides power to the various blocks of the smartphone 2500 shown in fig. 11 via a feed line, which is partially shown as a dashed line in the figure. The assist controller 2519 operates the minimum necessary functions of the smartphone 2500, for example, in a sleep mode.

In the smartphone 2500 shown in fig. 12, the transceiving means of the device on the user equipment side according to the embodiment of the present invention may be implemented by the wireless communication interface 2512. At least a part of the functions of the processing circuits and/or the units of the electronic device or the information processing apparatus on the user equipment side according to the embodiment of the present invention may also be realized by the processor 2501 or the auxiliary controller 2519. For example, power consumption of the battery 2518 may be reduced by performing part of the functions of the processor 2501 by the auxiliary controller 2519. Further, the processor 2501 or the auxiliary controller 2519 may execute at least a part of the functions of the processing circuits and/or the units of the electronic device or the information processing apparatus on the user equipment side according to the embodiment of the present invention by executing a program stored in the memory 2502 or the storage 2503.

[ application example with respect to base station ]

Fig. 13 is a block diagram illustrating an example of a schematic configuration of a gNB to which the technique of the present disclosure can be applied. The gbb 2300 includes a plurality of antennas 2310 and a base station apparatus 2320. The base station device 2320 and each antenna 2310 may be connected to each other via a Radio Frequency (RF) cable.

Each of the antennas 2310 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna), and is used for transmission and reception of wireless signals by the base station apparatus 2320. As shown in fig. 13, the gNB 2300 may include a plurality of antennas 2310. For example, the multiple antennas 2310 may be compatible with multiple frequency bands used by the gNB 2300.

The base station device 2320 includes a controller 2321, memory 2322, a network interface 2323, and a wireless communication interface 2325.

The controller 2321 may be, for example, a CPU or a DSP, and operates various functions of higher layers of the base station apparatus 2320. For example, the controller 2321 generates data packets from data in signals processed by the wireless communication interface 2325 and communicates the generated packets via the network interface 2323. The controller 2321 may bundle data from the plurality of baseband processors to generate a bundle packet, and transfer the generated bundle packet. The controller 2321 may have a logical function of performing control as follows: such as radio resource control, radio bearer control, mobility management, admission control and scheduling. This control may be performed in connection with a nearby gNB or core network node. The memory 2322 includes a RAM and a ROM, and stores programs executed by the controller 2321 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

The network interface 2323 is a communication interface for connecting the base station device 2320 to the core network 2324. The controller 2321 may communicate with a core network node or another gNB via a network interface 2323. In this case, the gNB 2300 and the core network node or other gnbs may be connected to each other through logical interfaces such as an S1 interface and an X2 interface. Network interface 2323 may also be a wired communication interface or a wireless communication interface for a wireless backhaul. If the network interface 2323 is a wireless communication interface, the network interface 2323 may use a higher frequency band for wireless communications than the frequency band used by the wireless communication interface 2325.

The wireless communication interface 2325 supports any cellular communication scheme, such as Long Term Evolution (LTE) and LTE-advanced, and provides wireless connectivity to terminals located in the cell of the gNB 2300 via an antenna 2310. The wireless communication interface 2325 may generally include, for example, a BB processor 2326 and RF circuitry 2327. The BB processor 2326 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing of layers, such as L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). The BB processor 2326 may have a part or all of the above-described logic functions in place of the controller 2321. The BB processor 2326 may be a memory that stores a communication control program, or a module including a processor configured to execute a program and related circuitry. The update program may cause the function of the BB processor 2326 to change. The module may be a card or blade that is inserted into a slot of the base station device 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 transmit and receive a wireless signal via the antenna 2310.

As shown in fig. 13, wireless communication interface 2325 may include a plurality of BB processors 2326. For example, the plurality of BB processors 2326 may be compatible with the plurality of frequency bands used by the gNB 2300. As shown in fig. 13, the wireless communication interface 2325 may include a plurality of RF circuits 2327. For example, the plurality of RF circuits 2327 may be compatible with a plurality of antenna elements. Although fig. 13 shows an example in which the wireless communication interface 2325 includes a plurality of BB processors 2326 and a plurality of RF circuits 2327, the wireless communication interface 2325 may also include a single BB processor 2326 or a single RF circuit 2327.

In the gNB 2300 shown in fig. 13, the transceiver of the wireless communication device on the base station side can be realized by the wireless communication interface 2325. At least a part of the functions of the processing circuits and/or units of the electronic device or wireless communication apparatus on the base station side may also be realized by the controller 2321. For example, the controller 2321 may execute at least a part of the functions of the processing circuits and/or the units of the electronic device or the wireless communication apparatus on the base station side by executing a program stored in the memory 2322.

In the foregoing description of specific embodiments of the invention, features described and/or illustrated with respect to one embodiment may be used in the same or similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

In the above embodiments and examples, numerical reference numerals have been used to indicate various steps and/or elements. It will be appreciated by those of ordinary skill in the art that these reference numerals are merely for convenience of description and drawing and do not denote any order or any other limitation.

In addition, the method of the present invention is not limited to be performed in the time sequence described in the specification, and may be performed in other time sequences, in parallel, or independently. Therefore, the order of execution of the methods described in this specification does not limit the technical scope of the present invention.

While the present invention has been disclosed above by the description of specific embodiments thereof, it should be understood that all of the embodiments and examples described above are illustrative and not restrictive. Various modifications, improvements and equivalents of the invention may be devised by those skilled in the art within the spirit and scope of the appended claims. Such modifications, improvements and equivalents are also intended to be included within the scope of the present invention.

In addition, the embodiment of the invention also comprises:

(1) an electronic device for wireless communication, comprising processing circuitry configured to:

obtaining the distance between a sending end and a receiving end of the backscattering communication;

determining one or more ambient radio frequency sources for the backscatter communications based on the distance; and

informing or controlling the ambient radio frequency source to provide radio frequency signals for the backscatter communications.

(2) The electronic apparatus according to (1), wherein the distance is obtained by:

and carrying out backscattering communication between the receiving end and the transmitting end, and estimating the distance between the receiving end and the transmitting end according to the initial signal transmitting 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 of (1), wherein the determination of the ambient radio frequency source comprises:

determining one or more signal sources, for which the estimated received power at the transmitting end reaches a predetermined level, as the ambient radio frequency sources based on the position of the receiving end and the distance between the transmitting end and the receiving end, if the position of the receiving end is available; or

And under the condition that the position of the receiving end cannot be obtained, at least the serving base station of the receiving end is determined as the environmental radio frequency source.

(4) The electronic device of (3), the processing circuitry further configured to:

under the condition that the position of the receiving end can be obtained, determining the signal coverage range of the environment radio frequency source based on the positions of the environment radio frequency source and the receiving end and the distance between the transmitting end and the receiving end, so that the transmitting end is in the signal coverage range; or

Estimating a distance between the receiving end and the serving base station in case the position of the receiving end cannot be obtained.

(5) The electronic device of (4), the processing circuitry further configured to: control to inform the ambient radio frequency source of the determined signal coverage.

(6) The electronic device of (1), the processing circuitry further configured to:

and allocating time-frequency resources for the backscattering communication, or controlling to send an allocation request of the time-frequency resources to the environmental radio frequency source.

(7) The electronic device of (1), the processing circuitry further configured to: determining one or more interference sources of backscatter communications, the interference sources including signal sources that generate interference to the transmitting end and/or the receiving end.

(8) The electronic device of (7), wherein the determination of the interference source comprises:

under the condition that the position of the receiving end can be obtained, determining a signal source which is within a first distance from the receiving end and is except the environment radio frequency source as the interference source; or

And under the condition that the position of the receiving end cannot be obtained, the signal source except the environmental radio frequency source within a second distance from the service base station of the receiving end is determined as the interference source.

(9) The electronic device of (7), the processing circuitry further configured to:

under the condition that the position of the receiving end can be obtained, determining a signal forbidden range of the interference source based on the positions of the interference source and the receiving end and the distance between the transmitting end and the receiving end, so that the transmitting end is in the determined signal forbidden range; or

And under the condition that the position of the receiving end cannot be obtained, determining a signal prohibition range of the interference source based on the distance between the receiving end and the service base station, the distance between the transmitting end and the receiving end and the positions of the interference source and the service base station, so that the transmitting end is in the determined signal prohibition range.

(10) The electronic device of (9), the processing circuitry further configured to: control to notify the interference source of the determined signal inhibition range.

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

(12) A method of wireless communication, comprising:

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

estimating the distance between a transmitting end and a receiving end of the backscattering communication;

notifying the estimated distance to a serving base station of the receiving end; and

the backscatter communications are conducted using a radio frequency signal from an ambient radio frequency source, wherein the ambient radio frequency source is determined based on the distance.

(14) The electronic device of (13), wherein the estimation of the distance comprises:

(15) The electronic device of (13), the processing circuitry further configured to: control to report the position of the receiving end to the serving base station.

(16) A method of wireless communication, comprising:

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

determining time-frequency resources for backscatter communications based on a resource allocation request from a communication device;

control to notify the communication device of the determined time-frequency resources; and

control to provide a radio frequency signal for the backscatter communications,

wherein the resource allocation request is transmitted by the communication device for an ambient radio frequency source determined based on a distance between a transmitting end and a receiving end of the backscatter communication.

(18) The electronic device of (17), the processing circuitry further configured to: providing a radio frequency signal for the backscatter communication based on the indication information received from the communication device regarding signal coverage.

(19) A method of wireless communication, comprising:

notifying the communication device of the determined time-frequency resources; and

providing a radio frequency signal for the backscatter communication,

(20) A computer-readable medium comprising executable instructions that, when executed by an information processing apparatus, cause the information processing apparatus 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:

2. The electronic device of claim 1, wherein the distance is obtained by:

3. The electronic device of claim 1, wherein the determination of the ambient radio frequency source comprises:

4. The electronic device of claim 3, the processing circuit further configured to:

5. The electronic device of claim 1, the processing circuit further configured to:

6. The electronic device of claim 1, the processing circuit further configured to: determining one or more interference sources of backscatter communications, the interference sources including signal sources that generate interference to the transmitting end and/or the receiving end.

7. The electronic device of claim 6, wherein the determination of the interference source comprises:

8. The electronic device of claim 6, the processing circuit further configured to:

9. A method of wireless communication, comprising:

10. A computer-readable medium comprising executable instructions that, when executed by an information processing device, cause the information processing device to perform the method of claim 9.