WO2021043050A1 - Electronic device, wireless communication method, and computer readable medium - Google Patents

Abstract

The present invention relates to an electronic device, a wireless communication method, and a computer readable medium. According to one embodiment, an electronic device for wireless communication comprises a processing circuit. The processing circuit 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 on the basis of the distance, and notify or control the ambient radio frequency sources to provide a radio frequency signal for the backscatter communication.

Description

Electronic device, wireless communication method and computer readable medium

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on September 2, 2019, the application number is 201910822606.6, the name of the invention is electronic devices, wireless communication methods and computer-readable media", the entire content of which is incorporated by reference In this application.

Technical field

The present disclosure generally relates to the field of wireless communication, and more specifically, to electronic devices, wireless communication methods, and computer-readable media for wireless communication.

Background technique

Ambient backscatter uses radio frequency (RF) signals, such as radio, television, and mobile phone signals, to achieve data transmission without the need for batteries. Environmental backscatter technology can be used on devices that are inconvenient to supply or replace external power sources, and is expected to achieve low energy consumption and low-cost communication in Internet of Things (IoT) applications.

The backscatter receiver (BRx) decodes based on energy detection. At this time, the direct link interference of the environmental RF source is regarded as noise. This method has higher requirements on the signal-to-noise ratio of the communication system, and the data transmission rate is lower. In addition, in some application scenarios, the method of allocating additional time-frequency resources for environmental backscatter communication is adopted to suppress direct link interference. Specifically, additional time-frequency resources can be allocated for backscatter communication, and the environmental RF source can provide an RF signal to the backscatter transmitter (BTx) at a specific time or frequency. Alternatively, BTx can be configured with dedicated hardware to shift the frequency of the backscatter signal to a non-overlapping frequency band.

Summary of the invention

A brief overview of the embodiments of the present invention is given below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that the following summary is not an exhaustive summary of the present invention. It is not intended to determine the key or important part of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is simply to present some concepts in a simplified form as a prelude to the more detailed description that will be discussed later.

According to one embodiment, an electronic device for wireless communication is provided, which includes a processing circuit. The processing circuit is configured to: obtain the distance between the transmitting end and the receiving end of the backscatter communication; determine one or more environmental radio frequency sources for backscatter communication based on the distance; and notify or control that the environmental radio frequency source is the reverse Provide radio frequency signals to scatter communications.

According to one embodiment, a wireless communication method includes: obtaining a distance between a transmitting end and a receiving end of backscatter communication; determining one or more environmental radio frequency sources for backscatter communication based on the distance; and notifying or The controlled environment radio frequency source provides radio frequency signals for backscatter communication.

According to one embodiment, an electronic device for wireless communication is provided, which includes a processing circuit. The processing circuit is configured to: estimate the distance between the sending end and the receiving end of the backscatter communication; notify the serving base station of the receiving end of the estimated distance; and perform the backscatter communication using the radio frequency signal from the environmental 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 the transmitting end and the receiving end of backscatter communication; notifying the serving base station of the receiving end of the estimated distance; Backscatter communication, where the ambient radio frequency source is determined based on distance.

According to one embodiment, an electronic device for wireless communication is provided, which includes a processing circuit. The processing circuit is configured to: determine a time-frequency resource for backscatter communication based on a resource allocation request from the communication device; perform control to notify the communication device of the determined time-frequency resource; and perform control for backscatter communication Provide radio frequency signals. The resource allocation request is sent by the communication device to the environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.

According to one embodiment, a wireless communication method includes: determining a time-frequency resource for backscatter communication based on a resource allocation request from a communication device; notifying the determined time-frequency resource to the communication device; and backscattering Communication provides radio frequency signals. The resource allocation request is sent by the communication device to the environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.

The embodiments of the present disclosure are beneficial to improve the quality of backscatter communication.

Description of the drawings

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 in all the drawings to denote the same or similar components. The drawings together with the following detailed description are included in the specification and form a part of the specification, and are used to further illustrate the preferred embodiments of the present invention and explain the principles and advantages of the present invention. In the attached picture:

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

Fig. 2 shows an example process of determining the environmental radio frequency source;

Figure 3 shows an example process of determining the signal coverage of an environmental radio frequency source;

FIG. 4 shows an example process of determining the interference source;

FIG. 5 shows an example process of determining the signal prohibition range of the interference source;

FIG. 6 is a flowchart showing a process example 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 device for wireless communication according to an embodiment of the present invention;

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

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

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

FIG. 11 is a block diagram showing an exemplary structure of a computer implementing the method and device of the present disclosure;

FIG. 12 is a block diagram showing an example of a schematic configuration of a smart phone to which the technology of the present disclosure can be applied;

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

FIG. 14 is a schematic diagram for explaining interference when the environmental RF source and BRx are different physical entities;

FIG. 15 is a schematic diagram for explaining interference when the environmental RF source and BRx are the same physical entity;

FIG. 16 is a schematic diagram showing the backscatter communication process when estimating the distance between the transmitting and receiving ends;

Figure 17 shows an example of an application scenario of a cooperative relay network including backscatter;

FIG. 18 shows a specific example of the application scenario example shown in FIG. 17;

FIG. 19 shows an example of an application scenario of a homogeneous multi-cell network including short-distance backscatter;

FIG. 20 shows an example of an application scenario of a homogeneous multi-cell network including long-distance backscatter;

Figure 21 shows an example of an application scenario of heterogeneous ultra-dense networking including short-distance backscattering;

Figure 22 shows an example of an application scenario of heterogeneous ultra-dense networking including long-distance backscattering;

FIG. 23 is a schematic diagram for explaining a plane geometric model of a cellular communication system including backscatter;

Figure 24 shows an example of an application scenario with two environmental RF sources;

FIG. 25 is a schematic diagram for explaining an exemplary way of calculating the scanning angle of an environmental RF source;

FIG. 26 is a schematic diagram for explaining a plane geometric model when the serving base station does not know the location of BRx;

FIG. 27 is a schematic diagram for explaining an exemplary manner of calculating the scanning prohibition angle of an interference source;

FIG. 28 is a signaling flowchart for explaining an example of a communication process in the case where the serving base station and the environmental RF source are different physical entities;

FIG. 29 is a signaling flowchart for explaining an example of a communication process in the case where the serving base station and the environmental RF source are the same physical entity; and

FIG. 30 is a signaling flowchart for explaining an example of a communication process in a case where the serving base station does not know the location of BRx.

detailed description

Hereinafter, embodiments of the present invention will be explained with reference to the drawings. The elements and features described in one drawing or one embodiment of the present invention may be combined with the elements and features shown in one or more other drawings or embodiments. It should be noted that, for the purpose of clarity, representations and descriptions of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted in the drawings and descriptions.

As shown in FIG. 1, 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, a chipset, or a central processing unit (CPU), for example.

The processing circuit 110 includes an obtaining unit 111, a determining unit 113, and a control unit 115. It should be pointed out that although the obtaining unit 111, the determining unit 113, and the control unit 115 are shown in the form of functional blocks in the drawings, it should be understood that the functions of each unit can also be realized by the processing circuit as a whole, and not necessarily It is achieved by processing discrete actual components in the circuit. In addition, although the processing circuit is shown in a block in the figure, the electronic device may include multiple processing circuits, and the functions of each unit may be distributed to multiple processing circuits, so that the multiple processing circuits perform these functions in cooperation. .

Before further describing this embodiment, first, a brief description of the sending end, the receiving end, the environmental RF source and the interference source of the backscatter communication will be given.

Cellular communication systems that include environmental backscatter can be roughly divided into two categories: one is that the environmental RF source and BRx are different physical nodes, and the other is that the two are the same physical node. The block diagrams of these two types of systems are shown in Figure 14 and Figure 15 respectively. BTx can be an IoT terminal or tag. It collects energy from RF signals provided by surrounding signal sources, drives internal circuits, modulates the symbol information that needs to be sent onto the received signal, and reflects it to BRx. BRx can be a relay or a tag, and it needs to decode the received signal with certain interference to obtain effective symbol information. The environmental RF source can be a relay, a small cell access point (AP) or a gNB, and the RF signal it sends 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, and the RF signal it sends interferes with the backscatter communication in the environment. Environmental backscatter communication means that BTx uses the existing RF signal in the surrounding environment to collect energy to drive the internal circuit, and reflects the modulated signal to BRx to realize information transmission (as shown by the realization lines in Figure 14 and Figure 15).

In addition, as shown in Figure 14 and Figure 15, 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, a gNB or a small cell AP (which can be selected by the serving gNB of BRx), and the interference source can be a gNB or a small cell AP (which can be determined by the serving gNB).

Hereinafter, an application example of a cellular communication system including environmental backscatter will be briefly described with reference to FIGS. 17-22.

Figure 17 is a cooperative relay network with environmental backscatter. Relays are environmental RF sources, while other signal sources are interference sources.

Figure 18 shows a more specific example of a cooperative relay network that includes environmental backscatter. The power and hardware limitations of the IoT terminal (as BTx) and the long distance between it and the serving gNB make it difficult to communicate directly with the serving gNB. As shown in Figure 18, three IoT terminals use sensors to collect information and upload it to the drone (as BRx) through backscattering. The drone receives all the information sent by the IoT terminal and forwards it to the service gNB.

Figures 19 and 20 show a homogeneous multi-cell network with short-distance backscatter and long-distance backscatter, respectively. The serving gNB can select an environmental RF source, and the remaining signal sources within a certain range can be determined as interference sources. BRx located in the coverage area of different signal sources are affected by different interferences.

Figure 21 and Figure 22 respectively show heterogeneous ultra-dense networking with short-distance backscatter and long-distance backscattering. The difference between them and Figures 19 and 20 lies in the structure and structure of the cells in the heterogeneous ultra-dense networking. The signal source distribution is more complicated.

Referring back to FIG. 1, the electronic device 100 according to the present embodiment may work as a serving base station of the receiving end, for example, but the present invention is not limited to this.

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.

According to one embodiment, the obtaining unit 111 obtains the distance between the transmitting end and the receiving end in the following manner: specific backscatter communication is performed between the receiving end and the transmitting end, according to the initial signal transmission power of the receiving end and the receiving end from the transmitting end. The power of the reflected signal received by the end, estimate the distance between the receiving end and the sending end.

FIG. 16 shows an example of a specific backscatter communication process performed when BRx performs distance estimation. In this example, BRx first broadcasts _{an RF signal with a power of P 1} ; then, BTx collects energy from the RF signal and reflects the symbol information "1" to BRx; assume that the distance between the backscattering and receiving ends is much smaller than the signal source The distance between BTx and BTx. When BRx performs distance estimation, the interference signal of the signal source is ignored.

The received signal power of BTx can be expressed as

Among them, G _T (G _R ) represents the transmission (or reception) antenna gain of BRx (or BTx), c represents the speed of light, f _c represents the carrier frequency of the RF signal, and d represents the distance between the receiving and sending ends to be estimated.

Similarly, the received signal power at BRx can be expressed as

Among them, η represents the reflection coefficient of BTx, which controls the power of the reflected signal.

Therefore, the distance between the receiving and receiving ends of the backscattering can be expressed by the following formula (1):

BRx sends the estimated distance to the serving gNB it accesses for subsequent calculations.

It should be pointed out that the foregoing distance determination method is exemplary rather than restrictive.

With continued reference to FIG. 1, the determining unit 113 is configured to determine one or more ambient radio frequency sources for backscatter communication based on the distance 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 (multiple ways can be used to obtain the position of the terminal, for example, the Observed Time Difference of Arrival (OTDOA)), it is determined The unit 113 may determine, 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 as the environmental radio frequency source. On the other hand, in the case where the location of the receiving end cannot be obtained, the determining unit 113 may at least determine the serving base station of the receiving end as the environmental radio frequency source.

Taking a situation where the electronic device 100 works as a serving base station at the receiving end as an example, the serving gNB of BRx can compare the received power of each neighboring signal source to the BTx. In order 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 from the signal source to BTx. If the serving gNB does not know the location of the BRx, it selects itself and the adjacent signal source (in the case of multiple environmental RF sources) as the environmental RF source.

More specifically, the serving gNB can compare the received power of each adjacent signal source at BTx. The plane geometric model of the cellular communication system that introduces environmental backscatter is shown in Figure 23. If the serving gNB knows the location of BRx and has obtained the distance between the backscattering receiving and sending ends, then BTx can be a point on a circle with BRx as the origin and d as the radius. Figure 23 shows the possible locations of the two BTx (A). Assuming that the interference range at BTx is defined as l (l>d), all signal sources located in a circle with BRx as the origin and (d+1) as the radius can be candidates for environmental RF sources and interference sources. Assume various alternative service gNB known source location and transmit power of the i D _i adjacent signal sources received power is denoted as BTx

Wherein, P _Di of D _i is the transmit power, G _Di (G _A) is D _i (BTx) transmission (reception) antenna gain, r _i is the distance D _i between the signal source and BRx.

In order to obtain the best environmental backscatter communication quality, the signal source with the largest received power at BTx can be selected as the main environmental RF source, denoted by D _j , where,

Then, the serving gNB can send a configuration message to the main environment RF source, requesting the signal source to determine the time-frequency resource allocation (as explained in the following embodiments).

The above process is based on the assumption that the serving gNB knows the location of the BRx. The following describes the case where the serving gNB does not know the location of the BRx. At this time, the possible location area of the BTx is larger. Assuming that the interference range at BTx has been given, all signal sources in a circle with the serving gNB as the center and (d+d ₀ +l) as the radius can be candidates for environmental RF sources and interference sources. Since the serving gNB has the greatest possibility of covering BTx, it can select itself as the main environmental RF source.

If only one environmental RF source is needed, then there is only one element D _{j in the} set of environmental RF sources; and if multiple environmental RF sources are required to work together, the selected D _j will divide some of its neighboring signals according to the maximum received power criterion. Sources are sequentially added to the environmental RF source collection until the required number is reached.

Regarding the selection of the serving gNB and the environmental RF source, the requirement for the selection of the serving gNB is that the BRx must be within the coverage of the signal source, so that the serving gNB can obtain the position of the BRx or estimate the distance between it and the BRx, and the two can be To communicate. The selection criterion of the environmental RF source is that the received power at BTx is the largest. This is because the greater the received power at BTx, the more energy collected, the greater the power of the reflected signal, and the higher the quality of backscattered communication. . Therefore, the serving gNB and the environmental RF source can be different physical nodes or the same physical node.

Incidentally, although the current environmental backscatter technology usually only supports a single environmental RF source, it may also support multiple environmental RF sources to work together. Taking the application scenario of heterogeneous ultra-dense networking as an example, Figure 24 shows a situation with two environmental RF sources. AP ₁ and AP ₂ jointly provide RF signals to BTx.

The embodiment of the selection of the environmental radio frequency source is described above. In addition, according to an embodiment, the determining unit 113 may also determine the signal coverage range of the environmental radio frequency source.

Specifically, as shown in FIG. 3, when the location of the receiving end can be obtained, the determining unit 113 may determine the signal coverage of the environmental radio frequency source based on the positions of the environmental radio frequency source and the receiving end and the distance between the transmitting end and the receiving end. Make the sending end within the signal coverage. On the other hand, in the case where the location of the receiving end cannot be obtained, the determining unit 113 may estimate the distance between the receiving end and the serving base station.

Still taking the situation where the electronic device 100 works as a serving base station at the receiving end as an example, the serving gNB can collect two distance data, including the obtained distance between the receiving end and the distance between each environmental RF source and the BRx, for calculating the environmental RF The scan angle of all signal sources in the source set. If the serving gNB does not know the location of BRx, the angle calculation is not performed, but the distance between the serving gNB and BRx is estimated.

More specifically, after determining the set of environmental RF sources, the serving gNB can calculate the scanning angles of all signal sources in the set. The scanning angle of the environmental RF source is defined as the smallest angle that enables the beam emitted from the signal source to cover all possible positions of the BTx. In the previous example, it has been pointed out that the possible position range of BTx is a circle with BRx as the origin and d as the radius, and the scanning angle is the angle between the two tangent lines passing through the environmental RF source and tangent to the circle.

Figure 25 shows an example of the scanning angle of the RF source in the calculation environment. In FIG. 25, point A represents BTx, and point B represents BRx. Assuming that point D ₁ represents the environmental RF source, E ₁ and E ₂ are the tangent points of two tangents from point D ₁ to a circle with B as the origin and d as the radius, then ∠E ₁ D ₁ E ₂ is defined as the environment The scanning angle of the RF source D _{1 is calculated as follows:}

For the case where the serving gNB does not know the location of BRx, no angle calculation is performed. GNB services may be utilized, for example, reference signal received power (RSRP) estimating the distance between itself and BRx (represented by d _0), for subsequent processing and calculation. _{From the d and d 0} estimated in the previous example process, the possible location area range of the backscattering transceiver can be obtained, as shown in Figure 26. Similar to Figure 23, Figure 26 shows two possible locations (A and B) for BTx and BRx.

Continuing to refer to FIG. 1, according to an embodiment, when the electronic device 100 works as the main environment RF source, the determining unit 113 may also be configured to allocate time-frequency resources for backscatter communication. Or, when the electronic device 100 does not work as the main environmental RF source, the control unit 115 may be configured to perform control to send a time-frequency resource allocation request to the environmental RF source.

In other words, the main environmental RF source (which may be the electronic device 100 or other devices) can determine the operating frequency band of the environmental backscatter communication. If the environmental backscatter communication and cellular communication use the same frequency band, then a further interference cancellation process can be carried out; if the environmental backscatter uses an additional idle frequency band, the interference cancellation process can be omitted and the backscatter communication process can be directly carried out.

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 the environmental backscatter communication, and respectively determines the time occupied by the environmental backscatter communication And use frequency band. If the environmental backscatter communication and cellular communication use the same frequency band, the interference signal is also in this frequency band, and the serving gNB needs to further determine the source of the interference. If the environmental backscatter communication uses another free frequency band, the serving gNB can skip the interference cancellation process.

Next, the processing related to interference cancellation will be explained.

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 including signal sources that interfere with the transmitting end and/or the receiving end.

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

Still taking the situation where the electronic device 100 works as the serving base station of the receiving end as an example, the serving gNB can further determine the interference source set based on the environmental RF source set has been determined. The selection criteria of interference sources are relatively flexible. One is that the remaining signal sources after removing the environmental RF source from the candidate signal sources form an interference source set, which is expressed as follows:

{D _k ,k＝1,2,3,…}\D _j , formula (4)

Among them, {D _k ,k=1, 2, 3,...} represents all candidate signal sources, and D _j represents the selected environmental RF source.

In addition, if considering the received power of different signal sources at BTx, the selected interference source set can be further adjusted. If the environmental RF source is close to the BTx, and its signal received power at BTx is much greater than that of other signal sources at BTx, part of the signal sources can be ignored and the set of interference sources is reduced. If the environmental RF source is relatively far away from the BTx, the defined interference range needs to be increased, and the set of interference sources is expanded.

The example embodiment of the determination of the interference source is described above. In addition, according to an embodiment, the determining unit 113 may also determine the signal prohibition range of the interference source.

Specifically, as shown in FIG. 5, when the position of the receiving end can be obtained, the determining unit 113 may determine the signal forbidden range of the interference source based on the positions of the interference source and the receiving end and the distance between the sending end and the receiving end, so that the sending The terminal is within the determined signal prohibition range. On the other hand, if the location of the receiving end cannot be obtained, the determining unit 113 may determine the location of the interference source based on the distance between the receiving end and the base station, the distance between the sending end and the receiving end, and the location of the interference source and the serving base station. The signal prohibition range makes the sending end within the determined signal prohibition range.

Still taking the case where the electronic device 100 works as a serving base station at the receiving end as an example, the serving gNB can calculate the forbidden scanning angle of each interference source based on the estimated distance between the receiving end and the distance between each interference source and BRx. If the serving gNB does not know the location of the BRx, the estimated distance between the sending and receiving ends, the estimated distance between the serving gNB and the BRx, and the distance between each interference source and the serving gNB need to be used.

The forbidden scanning angle of the interference source is defined as the smallest angle that enables the beam emitted from the signal source to avoid all possible positions of the BTx. As pointed out in the previous example, the possible position range of BTx is a circle with BRx as the origin and d as the radius. Correspondingly, the forbidden scanning angle of the interference source may be the angle between two tangent lines passing through the point where the interference source is located and tangent to the circle.

An example of calculating the forbidden scanning angle of the interference source is shown in Fig. 27. Point A represents BTx, and point B represents BRx. Suppose that the point D ₁ represents the only environmental RF source, and the point set {D ₂ , D ₃ ,...} represents a set of interference sources. F ₁ and F ₂ are the tangent points of two tangent lines from point D ₂ to the circle with B as the origin and d as the radius, then ∠F ₁ D ₂ F ₂ is defined as the forbidden scanning angle of the interference source D _{2 and calculate} The formula is as follows:

The forbidden scanning angles of other interference sources can be calculated in this way.

The above example is based on the assumption that the serving gNB knows the location of BRx. When the serving gNB does not know the location of the BRx, referring to the foregoing example, the possible location range of the BTx is a circle with the serving gNB as the center and (d+d ₀ +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.

Similarly, an example of calculating the forbidden scanning angle of the interference source when the serving gNB does not know the location of the BRx will be described with reference to FIG. 26. Point A represents BTx, point B represents BRx, and point C represents serving gNB. Taking interference source D ₂ as an example, its forbidden scanning angle is defined as ∠α, and the calculation formula is as follows:

The forbidden scanning angles of other interference sources can be calculated by the above formula.

However, it should be pointed out that the method of determining and calculating the interference source and the scanning prohibition angle is not limited to the above example.

Continuing to refer to FIG. 1, the control unit 115 may be configured to notify or control the environmental radio frequency source to provide radio frequency signals for backscatter communication. More specifically, when the electronic device 100 works as an environmental RF source, the control unit 115 can control the environmental radio frequency source to provide a radio frequency signal for backscatter communication; when the electronic device 100 does not work as an environmental RF source, the control unit 115 115 can notify the ambient radio frequency source to provide radio frequency signals for backscatter communication.

In addition, when the determining unit 113 determines the signal coverage of the environmental radio frequency source, the control unit 115 may perform control to notify the determined signal coverage to the environmental radio frequency source.

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

Still taking the situation where the electronic device 100 works as a serving base station at the receiving end as an example, the serving gNB can separately notify all the selected signal sources in the two sets of the required angles, including the scanning angle of the environmental RF source and the forbidden scanning angle of the interference source. , In order to achieve coordinated control. The environmental RF source can provide an RF signal for the environmental backscatter communication, and the interference source can avoid interference according to the forbidden scanning angle.

In addition, the serving gNB can obtain the time-frequency resource allocation message determined by the main environment RF source, and perform coordinated control of resources and beams. More specifically, the main environmental RF source can notify each environmental RF source of the scanning angle, and the environmental RF source accordingly provides an RF signal to the BTx on the determined time-frequency resource for environmental backscatter communication. If there is an interference source, the serving gNB can notify each interference source of the forbidden scanning angle, so that the interference source avoids sending beams to the environment backscatter communication area within the determined environmental backscatter communication time.

When the serving gNB does not know the location of BRx, the ambient RF source can broadcast RF signals. Similarly, if there is an interference source, the serving gNB can notify each interference source of the forbidden scanning angle, and all interference sources work together to avoid prohibiting signal transmission within the scanning angle.

In the above embodiment, BTx uses RF signals from environmental RF sources for energy collection and data transmission. By adopting a cooperative interference controller, the interference at the BRx can be effectively reduced, thereby helping BRx decoding to obtain the required information. Figures 28 to 30 show the signaling flow diagrams in an example embodiment. Figure 28 corresponds to the case where the serving gNB and the environmental RF source are different physical entities, Figure 29 corresponds to the case where the serving gNB and the environmental RF source are the same physical entity, and Figure 30 corresponds to the case where the serving gNB does not know the location of BRx (in In this case, the serving gNB is selected as the environmental RF source). It should be pointed out that the example processes in FIGS. 28 to 30 include multiple aspects in the foregoing embodiment, but it should be understood that the embodiment of the present invention does not necessarily need to include all of these aspects.

In addition, the cooperative interference control in cellular communication for introducing environmental backscatter according to the embodiment can be extended to device-to-device direct communication (D2D communication). Taking a cooperative relay network that includes environmental backscattering as an example, the communication between the sender and receiver is realized by environmental backscattering to reduce energy consumption. BTx has a simple structure and limited power, and cannot directly transmit information to a long-distance service gNB. Instead, it uploads the information to BRx through environmental backscattering, and then BRx sends all the collected information to the service gNB. On the other hand, D2D communication enables two user terminals within a certain distance to communicate directly, reducing the load of serving gNB. Before the two user terminals directly communicate, the sender can send a request to the serving gNB, and the serving gNB allocates specific time-frequency resources. It can be seen that D2D communication is similar to environmental backscatter communication, but the latter is an automatic transmission method. Therefore, the embodiments of the present invention can be applied to automatic D2D communication scenarios.

The above-mentioned aspects of the embodiments of the present disclosure may have one or more of the following advantages: effectively reduce interference from signal sources introduced in cellular communication; avoid environmental interference when the service gNB does not know the location of BRx, and broaden applications Scope; environmental RF sources and interference sources work together to avoid interference; diverse application scenarios, adapt to different environmental RF source selection methods and time-frequency allocation methods; environmental interference avoidance methods have lower overhead.

In the foregoing description of the device according to the embodiment of the present invention, it is obvious that some processes and methods are also disclosed. Next, without repeating the details described above, a description is given of the wireless communication method according to the embodiment of the present invention.

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

The apparatus and method of the foregoing embodiment may be implemented on the side of the serving base station of BRx, for example.

In addition, the embodiments of the present invention may also include devices and methods implemented on the BRx side. Next, without repeating the details corresponding to the details described in the foregoing embodiments, the apparatus and method for the BRx side according to the embodiments of the present invention are given.

As shown in FIG. 7, 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.

The estimation unit 711 is configured to estimate the distance between the transmitting end and the 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 estimating unit 711, and to perform backscatter communication using the radio frequency signal from the environmental radio frequency source, wherein the environmental radio frequency source is determined based on the notified distance.

According to one embodiment, the estimating unit 711 is configured to perform specific backscatter communication between the receiving end and the transmitting end, and estimate the received signal 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. The distance between the end and the sending end.

According to an embodiment, the control unit 713 is further configured to perform control to report the location of the receiving end to the serving base station.

FIG. 8 shows a process example corresponding to the method on the BRx side.

As shown in FIG. 8, the wireless communication method according to one embodiment includes: step S810 of estimating the distance between the sending end and the receiving end of backscatter communication; step S820 of notifying the serving base station of the receiving end of the estimated distance; And the step S830 of using the radio frequency signal from the environmental radio frequency source to perform backscatter communication, wherein the environmental radio frequency source is determined based on the notified distance.

In addition, the embodiments of the present invention may also include devices and methods implemented on the environmental radio frequency source side. Next, without repeating the details corresponding to the details described in the foregoing embodiments, the apparatus and method for the environmental radio frequency source side according to the embodiments of the present invention are given.

As shown in FIG. 9, the electronic device 900 for wireless communication according to this embodiment includes a processing circuit 910. The processing circuit 910 includes a determination unit 911 and a control unit 913.

The determining unit 911 is configured to determine the time-frequency resource used for backscatter communication based on the resource allocation request from the communication device. The resource allocation request is sent by the communication device to the environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.

The control unit 913 is configured to perform control to notify the communication device of the time-frequency resource determined by the determining unit 911, and to perform control to provide a radio frequency signal for backscatter communication.

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

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

As shown in FIG. 10, a wireless communication method according to an embodiment includes a step S1010 of determining a time-frequency resource for backscatter communication based on a resource allocation request from a communication device. The resource allocation request is sent by the communication device to the environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication. The method further includes a step S1020 of notifying the determined time-frequency resource to the communication device and a step S1030 of providing a radio frequency signal for backscatter communication.

In addition, the embodiment of the present invention also includes a computer-readable medium including executable instructions, which when executed by an information processing device, cause the information processing device to execute the method according to the above-mentioned embodiment.

As an example, each step of the foregoing method and each component module and/or unit of the foregoing apparatus may be implemented as software, firmware, hardware, or a combination thereof. In the case of implementation by software or firmware, a computer with a dedicated hardware structure (such as the general-purpose computer 1100 shown in FIG. 11) can be installed from a storage medium or network to a program that constitutes the software for implementing the above method. When there are various programs, various functions can be executed.

In FIG. 11, an arithmetic processing unit (i.e., CPU) 1101 executes various processes in accordance with a program stored in a read-only memory (ROM) 1102 or a program loaded from a storage portion 1108 to a random access memory (RAM) 1103. In the RAM 1103, data required when the CPU 1101 executes various processes and the like is also stored as needed. The CPU 1101, the ROM 1102, and the RAM 1103 are linked to each other via a bus 1104. The input/output interface 1105 is also linked to the bus 1104.

The following components are linked to the input/output interface 1105: input part 1106 (including keyboard, mouse, etc.), output part 1107 (including display, such as cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.) , Storage part 1108 (including hard disk, etc.), communication part 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. The driver 1110 can also be linked to the input/output interface 1105 according to needs. Removable media 1111 such as magnetic disks, optical disks, magneto-optical disks, semiconductor memory, etc. are mounted on the drive 1110 as needed, so that the computer programs read out therefrom are installed into the storage portion 1108 as needed.

In the case of implementing the above-mentioned series of processing by software, a program constituting the software is installed from a network such as the Internet or a storage medium such as a removable medium 1111.

Those skilled in the art should understand that this storage medium is not limited to the removable medium 1111 shown in FIG. 11 in which the program is stored and distributed separately from the device to provide the program to the user. Examples of removable media 1111 include magnetic disks (including floppy disks (registered trademarks)), optical disks (including compact disk read-only memory (CD-ROM) and digital versatile disks (DVD)), magneto-optical disks (including mini disks (MD) (registered trademarks) )) and semiconductor memory. Alternatively, the storage medium may be a ROM 1102, a hard disk included in the storage portion 1108, etc., in which programs are stored and distributed to users together with the devices containing them.

The embodiment of the present invention also relates to a program product storing machine-readable instruction codes. When the instruction code is read and executed by a machine, the above-mentioned method according to the embodiment of the present invention can be executed.

Correspondingly, a storage medium for carrying the above-mentioned program product storing machine-readable instruction codes is also included in the disclosure of the present invention. The storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and so on.

The embodiments of the present application also relate to the following electronic equipment. 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. A 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. Instead, the electronic device may be implemented as any other type of base station, such as NodeB and base transceiver station (BTS). The electronic device may include: a main body (also referred to as a base station device) configured to control wireless communication; and one or more remote wireless heads (RRH) arranged in a different place from the main body. In addition, various types of terminals to be described below can all operate as base stations by temporarily or semi-persistently performing base station functions.

When the electronic device is used on the user equipment side, it can 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/dongle type mobile router, and a digital camera) or In-vehicle terminals (such as car navigation equipment). In addition, the electronic device may be a wireless communication module (such as an integrated circuit module including a single or multiple chips) installed on each of the above-mentioned terminals.

[Application examples of terminal equipment]

FIG. 12 is a block diagram showing an example of a schematic configuration of a smart phone 2500 to which the technology of the present disclosure can be applied. The smart phone 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 An antenna switch 2515, one or more antennas 2516, a bus 2517, a battery 2518, and an auxiliary controller 2519.

The processor 2501 may be, for example, a CPU or a system on a chip (SoC), and controls the functions of the application layer and other layers of the smart phone 2500. The memory 2502 includes RAM and ROM, and stores data and programs executed by the processor 2501. The storage device 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 an external device such as a memory card and a universal serial bus (USB) device to the smart phone 2500.

The imaging 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 sensor 2507 may include a group of sensors, such as a measurement sensor, a gyroscope sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 2508 converts the sound input to the smart phone 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 the 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 the audio signal output from the smart phone 2500 into sound.

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 may generally include, for example, a baseband (BB) processor 2513 and a radio frequency (RF) circuit 2514. The BB processor 2513 may 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 transmit and receive wireless signals via the antenna 2516. The wireless communication interface 2512 may be a chip module on which the BB processor 2513 and the RF circuit 2514 are integrated. As shown in FIG. 12, the 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 the wireless communication interface 2512 includes a plurality of BB processors 2513 and a plurality of RF circuits 2514, the wireless communication interface 2512 may also include a single BB processor 2513 or a single RF circuit 2514.

In addition, in addition to the cellular communication scheme, the 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 this case, the wireless communication interface 2512 may include a BB processor 2513 and an RF circuit 2514 for each wireless communication scheme.

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

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 the wireless communication interface 2512 to transmit and receive wireless signals. As shown in FIG. 12, the smart phone 2500 may include multiple antennas 2516. Although FIG. 12 shows an example in which the smart phone 2500 includes a plurality of antennas 2516, the smart phone 2500 may also include a single antenna 2516.

In addition, the smart phone 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 camera 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. connection. The battery 2518 supplies power to each block of the smart phone 2500 shown in FIG. 11 via a feeder line, and the feeder line is partially shown as a dashed line in the figure. The auxiliary controller 2519 operates the minimum necessary functions of the smartphone 2500 in the sleep mode, for example.

In the smart phone 2500 shown in FIG. 12, the transceiving device of the device on the user equipment side according to the embodiment of the present invention may be implemented by a wireless communication interface 2512. According to the embodiment of the present invention, at least a part of the functions of the electronic device or the processing circuit of the information processing device and/or each unit on the user equipment side may 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 executing part of the functions of the processor 2501 by the auxiliary controller 2519. In addition, the processor 2501 or the auxiliary controller 2519 may execute the processing circuit and/or the processing circuit of each unit of the electronic device or the information processing device on the user equipment side according to the embodiment of the present invention by executing the program stored in the memory 2502 or the storage device 2503. At least part of the function.

[Application example of base station]

FIG. 13 is a block diagram showing an example of a schematic configuration of a gNB to which the technology of the present disclosure can be applied. The gNB 2300 includes multiple antennas 2310 and base station equipment 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 the base station device 2320 to transmit and receive wireless signals. As shown in FIG. 13, the gNB 2300 may include multiple antennas 2310. For example, multiple antennas 2310 may be compatible with multiple frequency bands used by gNB 2300.

The base station equipment 2320 includes a controller 2321, a 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 device 2320. For example, the controller 2321 generates a data packet based on the data in the signal processed by the wireless communication interface 2325, and transmits the generated packet via the network interface 2323. The controller 2321 may bundle data from multiple baseband processors to generate a bundled packet, and transfer the generated bundled packet. The controller 2321 may have a logic function for performing control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby gNB 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 a terminal list, transmission power data, and scheduling data).

The network interface 2323 is a communication interface for connecting the base station equipment 2320 to the core network 2324. The controller 2321 may communicate with the core network node or another gNB via the network interface 2323. In this case, the gNB 2300 and the core network node or other gNB can be connected to each other through logical interfaces (such as the S1 interface and the X2 interface). The network interface 2323 may also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 2323 is a wireless communication interface, the network interface 2323 can use a higher frequency band for wireless communication 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 connection to a terminal located in a cell of the gNB 2300 via an antenna 2310. The wireless communication interface 2325 may generally include, for example, a BB processor 2326 and an RF circuit 2327. The BB processor 2326 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform layers (such as L1, medium access control (MAC), radio link control (RLC), and packet data convergence protocol ( PDCP)) various types of signal processing. Instead of the controller 2321, the BB processor 2326 may have a part or all of the above-mentioned logical functions. The BB processor 2326 may be a memory storing a communication control program, or a module including a processor and related circuits configured to execute the program. The update program can change the function of the BB processor 2326. The module may be a card or a blade inserted into the slot of the base station device 2320. Alternatively, the module can also 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 wireless signals via the antenna 2310.

As shown in FIG. 13, the wireless communication interface 2325 may include a plurality of BB processors 2326. For example, multiple BB processors 2326 may be compatible with multiple frequency bands used by gNB 2300. As shown in FIG. 13, the wireless communication interface 2325 may include a plurality of RF circuits 2327. For example, multiple RF circuits 2327 may be compatible with multiple 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 device of the wireless communication device on the base station side may be implemented by the wireless communication interface 2325. At least a part of the functions of the electronic device or the processing circuit of the wireless communication device and/or each unit on the base station side may also be implemented by the controller 2321. For example, the controller 2321 may execute at least a part of the functions of the electronic device or wireless communication device on the base station side and/or the function of each unit by executing a program stored in the memory 2322.

In the above description of the specific embodiments of the present invention, the features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner as the features in other embodiments. Combine or replace features in other embodiments.

It should be emphasized that the term "including/comprising" when used herein refers to the existence of features, elements, steps or components, but does not exclude the existence or addition of one or more other features, elements, steps or components.

In the above-mentioned embodiments and examples, reference numerals composed of numbers are used to denote various steps and/or units. Those of ordinary skill in the art should understand that these reference signs are only for ease of description and drawing, and do not indicate the order or any other limitation.

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

Although the present invention has been disclosed above through the description of specific embodiments of the present invention, it should be understood that all the above-mentioned embodiments and examples are illustrative rather than restrictive. Those skilled in the art can design various modifications, improvements or equivalents to the present invention within the spirit and scope of the appended claims. These modifications, improvements or equivalents should also be considered to be included in the protection scope of the present invention.

In addition, the embodiment of the present invention further includes:

(1) An electronic device for wireless communication, which includes a processing circuit configured to:

Obtain the distance between the sending end and the receiving end of the backscatter communication;

Determine one or more ambient radio frequency sources for the backscatter communication based on the distance; and

Notifying or controlling the environmental radio frequency source to provide radio frequency signals for the backscatter communication.

(2) The electronic device according to (1), wherein the distance is obtained in the following manner:

Perform backscatter communication between the receiving end and the transmitting end, and estimate the receiving 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 The distance from the sending end.

(3) The electronic device according to (1), wherein the determination of the environmental radio frequency source includes:

In the case where the position of the receiving end can be obtained, based on the position of the receiving end and the distance between the transmitting end and the receiving end, the estimated received power at the transmitting end is set to one or more of a predetermined level. Multiple signal sources are determined to be the environmental radio frequency source; or

In the case that the location 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 according to (3), the processing circuit is further configured to:

If the location of the receiving end can be obtained, determine the signal coverage of the environmental radio frequency source based on the locations of the environmental radio frequency source and the receiving end and the distance between the transmitting end and the receiving end, So that the sending end is within the coverage area of the signal; or

In the case where the position of the receiving end cannot be obtained, the distance between the receiving end and the serving base station is estimated.

(5) The electronic device according to (4), wherein the processing circuit is further configured to perform control to notify the ambient radio frequency source of the determined signal coverage.

(6) The electronic device according to (1), the processing circuit is further configured to:

Allocate time-frequency resources for the backscatter communication, or perform control to send the time-frequency resource allocation request to the environmental radio frequency source.

(7) The electronic device according to (1), the processing circuit is further configured to determine one or more interference sources of backscatter communication, and the interference sources include interference to the transmitting end and/or The signal source that causes interference at the receiving end.

(8) The electronic device according to (7), wherein the determination of the interference source includes:

If the location of the receiving end can be obtained, a signal source other than the environmental radio frequency source within the first distance from the receiving end is determined as the interference source; or

In the case that the location of the receiving end cannot be obtained, a 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 (7), the processing circuit is further configured to:

In the case where the position of the receiving end can be obtained, based on the positions of the interference source and the receiving end and the distance between the sending end and the receiving end, the signal forbidden range of the interference source is determined so that all The sending end is within the determined signal prohibition range; or

In the case where the location of the receiving end cannot be obtained, based on the distance between the receiving end and the serving base station, the distance between the sending end and the receiving end, and the interference source and the serving base station To determine the signal forbidden range of the interference source, so that the sending end is within the determined signal forbidden range.

(10) The electronic device according to (9), the processing circuit is further configured to perform control to notify the interference source of the determined signal prohibition range.

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

(12) A wireless communication method, including:

Obtain the distance between the sending end and the receiving end of the backscatter communication;

Determine one or more ambient radio frequency sources for the backscatter communication based on the distance; and

Notifying or controlling the environmental radio frequency source to provide radio frequency signals for the backscatter communication.

(13) An electronic device for wireless communication, which includes a processing circuit configured to:

Estimate the distance between the sending end and the receiving end of backscatter communication;

Notifying the serving base station of the receiving end of the estimated distance; and

The backscatter communication is performed using a radio frequency signal from an environmental radio frequency source, wherein the environmental radio frequency source is determined based on the distance.

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

Perform backscatter communication between the receiving end and the transmitting end, and estimate the receiving 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 The distance from the sending end.

(15) The electronic device according to (13), the processing circuit is further configured to perform control to report the location of the receiving end to the serving base station.

(16) A wireless communication method, including:

Estimate the distance between the sending end and the receiving end of backscatter communication;

Notifying the serving base station of the receiving end of the estimated distance; and

The backscatter communication is performed using a radio frequency signal from an environmental radio frequency source, wherein the environmental radio frequency source is determined based on the distance.

(17) An electronic device for wireless communication, which includes a processing circuit configured to:

Determine the time-frequency resource used for backscatter communication based on the resource allocation request from the communication device;

Controlling to notify the communication device of the determined time-frequency resource; and

Control to provide radio frequency signals for the backscatter communication,

Wherein, the resource allocation request is sent by the communication device for an environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.

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

(19) A wireless communication method, including:

Determine the time-frequency resource used for backscatter communication based on the resource allocation request from the communication device;

Notifying the determined time-frequency resource to the communication device; and

Providing radio frequency signals for the backscatter communication,

Wherein, the resource allocation request is sent by the communication device for an environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.

(20) A computer-readable medium that includes executable instructions that, when the executable instructions are executed by an information processing device, cause the information processing device to execute according to any of (12), (16), and (19) The method described in one item.

Claims (20)

1. An electronic device for wireless communication includes a processing circuit configured to:

   Obtain the distance between the sending end and the receiving end of the backscatter communication;

   Determine one or more ambient radio frequency sources for the backscatter communication based on the distance; and

   Notifying or controlling the environmental radio frequency source to provide radio frequency signals for the backscatter communication.
2. The electronic device according to claim 1, wherein the distance is obtained in the following manner:

   Perform backscatter communication between the receiving end and the transmitting end, and estimate the receiving 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 The distance from the sending end.
3. The electronic device according to claim 1, wherein the determination of the environmental radio frequency source comprises:

   In the case where the position of the receiving end can be obtained, based on the position of the receiving end and the distance between the transmitting end and the receiving end, the estimated received power at the transmitting end is set to one or more of a predetermined level. Multiple signal sources are determined to be the environmental radio frequency source; or

   In the case where the location 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 according to claim 3, the processing circuit is further configured to:

   If the location of the receiving end can be obtained, determine the signal coverage of the environmental radio frequency source based on the locations of the environmental radio frequency source and the receiving end and the distance between the transmitting end and the receiving end, So that the sending end is within the coverage area of the signal; or

   In the case where the position of the receiving end cannot be obtained, the distance between the receiving end and the serving base station is estimated.
5. The electronic device according to claim 4, wherein the processing circuit is further configured to perform control to notify the environmental radio frequency source of the determined signal coverage.
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 perform control to send the time-frequency resource allocation request to the environmental radio frequency source.
7. The electronic device according to claim 1, wherein the processing circuit is further configured to determine one or more interference sources of backscatter communication, and the interference source includes the interference to the transmitting end and/or the receiving end. The source of the interference.
8. The electronic device according to claim 7, wherein the determination of the interference source comprises:

   If the location of the receiving end can be obtained, a signal source other than the environmental radio frequency source within the first distance from the receiving end is determined as the interference source; or

   In the case that the location of the receiving end cannot be obtained, a 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:

   In the case where the position of the receiving end can be obtained, based on the positions of the interference source and the receiving end and the distance between the sending end and the receiving end, the signal prohibition range of the interference source is determined so that all The sending end is within the determined signal prohibition range; or

   In the case where the location of the receiving end cannot be obtained, based on the distance between the receiving end and the serving base station, the distance between the sending end and the receiving end, and the interference source and the serving base station To determine the signal forbidden range of the interference source, so that the sending end is within the determined signal forbidden range.
10. The electronic device according to claim 9, wherein the processing circuit is further configured to perform control to notify the interference source of the determined signal prohibition range.
11. The electronic device according to any one of claims 1 to 10, wherein the electronic device works as a serving base station of the receiving end.
12. A wireless communication method includes:

    Obtain the distance between the sending end and the receiving end of the backscatter communication;

    Determine one or more ambient radio frequency sources for the backscatter communication based on the distance; and

    Notifying or controlling the environmental radio frequency source to provide radio frequency signals for the backscatter communication.
13. An electronic device for wireless communication includes a processing circuit configured to:

    Estimate the distance between the sending end and the receiving end of backscatter communication;

    Notifying the serving base station of the receiving end of the estimated distance; and

    The backscatter communication is performed using a radio frequency signal from an environmental radio frequency source, wherein the environmental radio frequency source is determined based on the distance.
14. The electronic device according to claim 13, wherein the estimation of the distance comprises:

    Perform backscatter communication between the receiving end and the transmitting end, and estimate the receiving 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 The distance from the sending end.
15. The electronic device according to claim 13, wherein the processing circuit is further configured to perform control to report the location of the receiving end to the serving base station.
16. A wireless communication method includes:

    Estimate the distance between the sending end and the receiving end of backscatter communication;

    Notifying the serving base station of the receiving end of the estimated distance; and

    The backscatter communication is performed using a radio frequency signal from an environmental radio frequency source, wherein the environmental radio frequency source is determined based on the distance.
17. An electronic device for wireless communication includes a processing circuit configured to:

    Determine the time-frequency resource used for backscatter communication based on the resource allocation request from the communication device;

    Controlling to notify the communication device of the determined time-frequency resource; and

    Control to provide radio frequency signals for the backscatter communication,

    Wherein, the resource allocation request is sent by the communication device for an environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.
18. The electronic device according to claim 17, wherein the processing circuit is further configured to provide a radio frequency signal for the backscatter communication based on the indication information about the signal coverage received from the communication device.
19. A wireless communication method includes:

    Determine the time-frequency resource used for backscatter communication based on the resource allocation request from the communication device;

    Notifying the determined time-frequency resource to the communication device; and

    Providing radio frequency signals for the backscatter communication,

    Wherein, the resource allocation request is sent by the communication device for an environmental radio frequency source determined based on the distance between the sending end and the receiving end of the backscatter communication.
20. A computer-readable medium comprising executable instructions, which when executed by an information processing device, cause the information processing device to execute the method according to any one of claims 12, 16 and 19.

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