CN106559365B

CN106559365B - Self-interference elimination method and equipment

Info

Publication number: CN106559365B
Application number: CN201510638902.2A
Authority: CN
Inventors: 韩波; 易雄书; 胡召宇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-09-30
Filing date: 2015-09-30
Publication date: 2020-02-14
Anticipated expiration: 2035-09-30
Also published as: CN106559365A

Abstract

The embodiment of the invention provides a self-interference elimination method and equipment. The self-interference elimination method of the invention comprises the following steps: the method comprises the steps that first configuration information is sent to second equipment by first equipment, the first configuration information is used for indicating the position of a first resource, and the second equipment stops sending data to the first equipment on the first resource; the first equipment carries out self-interference channel estimation on the first resource and acquires a self-interference channel; and when the first equipment receives the data sent by the second equipment in the full duplex mode, the self-interference channel is utilized to perform self-interference elimination. According to the embodiment of the invention, the first equipment can accurately perform self-interference channel estimation on the first resource, so that self-interference elimination can be better completed.

Description

Self-interference elimination method and equipment

Technical Field

Embodiments of the present invention relate to communications technologies, and in particular, to a method and device for eliminating self-interference.

Background

Duplex technologies used in mobile communication systems include Frequency Division Duplex (FDD), Time Division Duplex (TDD), and Full Duplex (Full Duplex). The full duplex can simultaneously carry out bidirectional transmission of signals with the same frequency.

In a mobile communication system in a full-duplex mode, when two communication devices communicate at the same frequency, a receiving antenna can receive not only a useful signal from an opposite terminal, but also a signal sent by the receiving antenna, namely, a self-interference signal. And since the distance between the transmitting antenna and the receiving antenna is quite close, the strength of the self-interference signal is often much higher than that of the useful signal of the opposite terminal.

Full-duplex technology is directed to the above problem resulting in a self-interference signal cancellation technique. The basic principle is as follows: since the communication device is aware of its own transmit signal, this self-interference signal can be cancelled out at the receive antenna by some means. Self-interference cancellation techniques are mainly closely related to peer-to-peer transmit signal power (desired signal), self-transmit signal power (self-interference signal), and self-interference cancellation capability. Self-interference cancellation techniques are basically classified into three categories: antenna interference cancellation, radio frequency interference cancellation, digital interference cancellation. The digital interference cancellation is the last step of a series of self-interference cancellation measures, and is complementary to the antenna interference cancellation and the radio frequency interference cancellation.

In the digital interference elimination process, a receiver extracts information from a desired transmitter when two transmitters send a collision, the receiver needs to decode data of the undesired transmitter first, then rebuild the data in a digital domain according to a link coefficient reaching an analog-digital converter (ADC) of the receiver, subtract the rebuilt data from a received original collision signal, and demodulate the remaining useful signal to obtain the information of the desired transmitter. The above-mentioned digital interference cancellation effect is not ideal.

Disclosure of Invention

The embodiment of the invention provides a self-interference elimination method and equipment, which are used for improving the digital interference elimination effect.

In a first aspect, an embodiment of the present invention provides a self-interference cancellation method, including:

the method comprises the steps that first equipment sends first configuration information to second equipment, wherein the first configuration information is used for indicating the position of first resources; wherein, on the first resource, the second device stops sending data to the first device;

the first equipment carries out self-interference channel estimation on the first resource and acquires a self-interference channel;

and when the first device receives data sent by the second device in a full duplex mode, the first device performs self-interference elimination by using the self-interference channel.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the performing, by the first device, self-interference channel estimation on the first resource, and acquiring a self-interference channel includes:

the first device sending a test sequence to the first device on the first resource;

the first device receives the test sequence sent by the first device on the first resource;

and the first equipment carries out self-interference channel estimation according to the test sequence and acquires a self-interference channel.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the performing, by the first device, self-interference cancellation by using the self-interference channel includes:

the first equipment acquires a self-interference signal according to the self-interference channel and data sent by the first equipment;

the first equipment carries out self-interference elimination on the data received by the first equipment according to the self-interference signal;

the data received by the first device includes data sent by the first device and data sent by the second device.

With reference to the first aspect and any one of the first to the second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the first configuration information is further used to indicate a location of the second resource; wherein the first device stops sending data to the second device on the second resource.

With reference to the first aspect and any one of the first to the second possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes:

the first device receives second configuration information sent by the second device, wherein the second configuration information is used for indicating the position of a third resource;

on the third resource, the first device stops sending data to the second device.

With reference to the first aspect and any one of the first to the second possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the first resource includes multiple resource elements REs, and a time-domain interval or a frequency-domain interval between the multiple REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation situation of a self-interference channel.

In a second aspect, an embodiment of the present invention provides a self-interference cancellation method, including:

the second equipment receives first configuration information sent by the first equipment, wherein the first configuration information is used for indicating the position of the first resource;

the second device stops sending data to the first device on the first resource.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first configuration information is further used to indicate a location of a second resource, where on the second resource, the first device stops sending data to the second device;

the method further comprises the following steps:

and the second equipment performs self-interference channel estimation on the second resource and acquires a self-interference channel.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes:

the second device sends second configuration information to the first device, wherein the second configuration information is used for indicating the position of a third resource, and the first device stops sending data to the second device on the third resource;

and the second equipment performs self-interference channel estimation on the third resource and acquires a self-interference channel.

With reference to the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

when the second device receives data sent by the first device in a full duplex mode, the second device obtains a self-interference signal according to the self-interference channel and the data sent by the second device;

the second device performs self-interference elimination on the data received by the second device according to the self-interference signal;

the data received by the second device includes data sent by the first device and data sent by the second device.

With reference to the second possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the third resource includes multiple resource elements REs, and a time interval or a frequency-domain interval between the multiple REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation situation of the self-interference channel.

In a third aspect, an embodiment of the present invention provides a first device, including:

a sending module, configured to send first configuration information to a second device, where the first configuration information is used to indicate a location of a first resource; wherein, on the first resource, the second device stops sending data to the first device;

a processing module, configured to perform self-interference channel estimation on the first resource and obtain a self-interference channel;

the processing module is further configured to perform self-interference cancellation by using the self-interference channel when the first device receives data sent by the second device in a full-duplex mode.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the sending module is further configured to send a test sequence to the first device on the first resource;

the first device further comprises a receiving module, configured to receive the test sequence sent by the sending module on the first resource;

the processing module is specifically configured to perform self-interference channel estimation according to the test sequence, and acquire a self-interference channel.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the performing, by the processing module, self-interference cancellation by using the self-interference channel specifically includes:

acquiring a self-interference signal according to the self-interference channel and the data sent by the sending module;

performing self-interference elimination on the signal data received by the receiving module according to the self-interference signal;

the data received by the receiving module includes the data sent by the sending module and the data sent by the second device.

With reference to the third aspect and any one of the first to second possible implementation manners of the third aspect, in a third possible implementation manner of the third aspect, the first configuration information is further used to indicate a location of a second resource, and the processing module is further used to control the sending module to stop sending data to the second device on the second resource.

With reference to the first or second possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the receiving module is further configured to receive second configuration information sent by the second device, where the second configuration information is used to indicate a location of a third resource;

the processing module is further configured to control the sending module to stop sending data to the second device on the third resource.

With reference to the third aspect and any one of the first to the second possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, the first resource includes multiple resource elements REs, and a time interval or a frequency domain interval between the multiple REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation situation of a self-interference channel.

In a fourth aspect, an embodiment of the present invention provides a second device, including:

a receiving module, configured to receive first configuration information sent by a first device, where the first configuration information is used to indicate a location of a first resource;

the processing module is used for controlling the sending module to stop sending data to the first equipment on the first resource.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the first configuration information is further used to indicate a location of a second resource, where on the second resource, the first device stops sending data to the second device;

the processing module is further configured to perform self-interference channel estimation on the second resource for the second device, and obtain a self-interference channel.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the sending module is further configured to send second configuration information to the first device, where the second configuration information is used to indicate a location of a third resource, where on the third resource, the first device stops sending data to the second device;

the processing module is configured to perform self-interference channel estimation on the third resource for the second device, and obtain a self-interference channel.

With reference to the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the processing module is further configured to, when the second device receives data sent by the first device in a full duplex mode, obtain a self-interference signal according to the self-interference channel and the data sent by the sending module;

performing self-interference elimination on the data received by the receiving module according to the self-interference signal;

the data received by the receiving module includes data sent by the first device and data sent by the sending module.

With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the third resource includes multiple resource elements REs, and a time interval or a frequency-domain interval between the multiple REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation situation of the self-interference channel.

According to the self-interference elimination method and the self-interference elimination equipment, the first equipment sends the first configuration information to the second equipment, the first configuration information is used for indicating the position of the first resource, so that the second equipment does not send any data or signaling to the first equipment on the first resource according to the first configuration information, the first equipment can accurately carry out self-interference channel estimation on the first resource, and further self-interference elimination is better completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of full duplex point-to-point communication;

fig. 2 is a schematic diagram of a full-duplex relay communication scenario;

fig. 3 is a schematic view of a full-duplex small cell communication scenario;

FIG. 4 is a flowchart illustrating a first embodiment of a self-interference cancellation method according to the present invention;

FIG. 5 is a flowchart illustrating a second embodiment of a self-interference cancellation method according to the present invention;

FIG. 6 is a flowchart illustrating a third embodiment of a self-interference cancellation method according to the present invention;

FIG. 7 is a flowchart illustrating a fourth embodiment of a self-interference cancellation method according to the present invention;

FIG. 8 is a flowchart of a fifth embodiment of a self-interference cancellation method according to the present invention;

FIG. 9 is a flowchart of a sixth embodiment of a self-interference cancellation method according to the present invention;

FIG. 10 is a signaling interaction diagram of a seventh embodiment of a self-interference cancellation method according to the present invention;

FIG. 11 is a diagram illustrating a resource distribution according to a first embodiment of a self-interference cancellation method of the present invention;

FIG. 12 is a diagram illustrating a resource distribution according to a second embodiment of a self-interference cancellation method of the present invention;

FIG. 13 is a diagram illustrating a third embodiment of resource distribution in a self-interference cancellation method according to the present invention;

FIG. 14 is a diagram illustrating a fourth embodiment of resource distribution in a self-interference cancellation method according to the present invention;

fig. 15 is a signaling interaction diagram of an eighth embodiment of a self-interference cancellation method according to the present invention;

FIG. 16 is a diagram illustrating a fifth embodiment of resource distribution in a self-interference cancellation method according to the present invention;

FIG. 17 is a diagram illustrating a sixth embodiment of resource distribution in a self-interference cancellation method according to the present invention;

FIG. 18 is a diagram illustrating a seventh embodiment of resource distribution in a self-interference cancellation method according to the present invention;

FIG. 19 is a diagram illustrating an eighth embodiment of resource distribution in a self-interference cancellation method according to the present invention;

FIG. 20 is a signaling diagram illustrating a ninth embodiment of a self-interference cancellation method according to the present invention;

FIG. 21 is a diagram illustrating a resource distribution in a self-interference cancellation method according to a ninth embodiment of the present invention;

FIG. 22 is a diagram illustrating a resource distribution according to a self-interference cancellation method of the present invention;

FIG. 23 is a diagram illustrating a resource distribution according to an eleventh embodiment of a self-interference cancellation method according to the present invention;

FIG. 24 is a diagram illustrating a resource distribution in a self-interference cancellation method according to a twelfth embodiment of the present invention;

FIG. 25 is a schematic structural diagram of a first apparatus according to a first embodiment of the present invention;

fig. 26 is a schematic structural diagram of a first apparatus according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The interference elimination method of the embodiment of the invention is suitable for various communication network systems, including a Long Term Evolution (LTE) system, a Time Division-Synchronous code Division Multiple Access (TD-SCDMA) system, a worldwide interoperability for Microwave Access (WiMax) system and the like.

The invention can be applied to different full-duplex application scenarios.

Full-duplex application scenarios can be classified into the following three categories: full duplex point-to-point communication, full duplex Relay (Relay), and full duplex small base stations.

Specifically, fig. 1 is a schematic diagram of full-duplex point-to-point communication, as shown in fig. 1, a communication device a has two antennas, one antenna is used for receiving data, and the other antenna is used for sending data, so that the communication device a can perform data receiving and sending at the same time and at the same frequency, and a communication device B and the communication device a have the same working principle. The antenna of the communication device a receiving data may also receive data sent by its own antenna sending data while receiving data sent by the communication device B, where the data sent by its own antenna sending data is a self-interference signal, and the communication device a needs to eliminate the self-interference signal. In the following embodiment, how to use the self-interference cancellation method of the embodiment of the present invention to complete interference cancellation in the application scenario of the present embodiment will be specifically explained.

Fig. 2 is a schematic diagram of a full-duplex Relay communication scenario, as shown in fig. 2, including a base station, a Relay and a terminal, where, in a downlink direction: the base station sends the downlink data to the Relay, the Relay sends the downlink data to the terminal, and the uplink direction: in the scene, a signal received by the Relay is a mixture of a remote signal (downlink data or uplink data) and a self-interference signal, so that only the Relay needs to perform self-interference elimination, and in the self-interference elimination process of the Relay, for the downlink direction, the Relay only needs to silence resources on the base station side by adopting the method of the embodiment of the invention, and for the uplink direction, the Relay only needs to silence resources on the terminal side by adopting the method of the embodiment of the invention. In the following embodiment, how to use the self-interference cancellation method of the embodiment of the present invention to complete interference cancellation in the application scenario of the present embodiment will be specifically explained.

Fig. 3 is a schematic diagram of a communication scenario of a full-duplex small cell, as shown in fig. 3, the communication scenario includes a base station, a terminal 1, and a terminal 2, where both the terminal 1 and the terminal 2 are in an FDD mode or a TDD mode, the base station is in the full-duplex mode on some subframes, and the terminal 1 and the terminal 2 correspond to a downlink and an uplink, respectively. In the following embodiment, how to use the self-interference cancellation method of the embodiment of the present invention to complete interference cancellation in the application scenario of the present embodiment will be specifically explained.

The first device in the self-interference cancellation method according to the following embodiment of the present invention may specifically be the communication device a shown in fig. 1, may specifically be a Relay (Relay) shown in fig. 2, or may also be the base station shown in fig. 3, and correspondingly, the second device may specifically be the communication device B shown in fig. 1, may specifically be the base station shown in fig. 2, or may also be the terminal 2 shown in fig. 3. The terminal may be (but is not limited to) a User Equipment (UE), that is, a smart phone, a Personal Computer (PC), a television, a handheld video game device, and the like.

Of course, the first device and the second device described in the embodiments of the present invention are not limited to the above examples. The first device may be any communication device capable of using a full duplex communication mode.

The "first resource", the "second resource" and the "third resource" in the embodiment of the present invention all refer to a resource block in a communication network system, and the size of the resource block may be flexibly set according to requirements, for example, the resource block may be a minimum resource block in the communication network system, and the minimum resource block of different communication network systems is different in size, for example, for an LTE system, the size of a minimum resource block is 1/14ms × 15kHZ, that is, a time domain 1/14ms, and a frequency domain 15 kHZ. It is understood that the resource block may be a subframe or the like with different sizes. It should be noted that the "first resource", the "second resource" and the "third resource" in the embodiment of the present invention are only used for distinguishing resources of different functions or sources.

Specifically, in this embodiment of the present invention, a "first resource" specifically refers to a self-interference channel estimation resource of a first device, where the first device performs self-interference channel estimation, a time-frequency resource of a second device at the same position as the self-interference channel estimation resource of the first device may be a muting resource of the second device, a "second resource" specifically refers to a muting resource of the first device, where the first device does not send any data or signaling to the second device, a time-frequency resource of the second device at the same position as the muting resource of the first device may be a self-interference channel estimation resource of the second device, and the second device may perform self-interference channel estimation at the self-interference channel estimation resource, to sum up, that is, a first resource of the first device, and a time-frequency resource of the second device at the same position as the first resource of the first device is a muting resource, and the second resource of the first equipment and the time-frequency resource of the second equipment at the same position as the second resource of the first equipment are self-interference channel estimation. That is, the self-interference channel estimation resource of the first device, the time-frequency resource of the second device at the same position as the self-interference channel estimation resource of the first device is a silence resource, and the silence resource of the first device, the time-frequency resource of the second device at the same position as the silence resource of the first device is a self-interference channel estimation resource. The first device or the second device performs self-interference channel estimation on the self-interference channel estimation resource and obtains a self-interference channel, and the self-interference channel can be used for self-interference cancellation by the first device or the second device at other time-frequency resources (resources for data transmission). And the first equipment or the second equipment does not send any data or signaling to the opposite equipment at the silent resource so that the opposite equipment carries out self-interference channel estimation and acquires a self-interference channel. The peer device herein specifically refers to a destination device for sending data, for example, in the embodiment shown in fig. 1, the peer device of the communication device a is the communication device B.

In addition, it should be noted that the "third resource" in this embodiment of the present invention specifically refers to a self-interference channel estimation resource of the second device, specifically, the "first resource" is generated by the first device by using self configuration, the self-interference channel estimation is performed on the first resource, configuration information that is generated by the second device by using self configuration of the second device and is used for indicating a position of the third resource may also be received, the second device performs self-interference channel estimation of the second device on the third resource, and the first device sets a resource at the same position as a silent resource, that is, the first device does not send any data or signaling to the second device on the third resource.

The self-interference elimination method of the embodiment of the invention is specifically a digital interference elimination method. The embodiment of the invention can accurately perform self-interference channel estimation, and further can better complete self-interference elimination, and a specific implementation manner can be seen in the explanation of the following embodiment.

Fig. 4 is a flowchart of a first embodiment of a self-interference cancellation method of the present invention, where an execution main body of the present embodiment is a first device, and as shown in fig. 4, the method of the present embodiment may include:

step 101, a first device sends first configuration information to a second device, wherein the first configuration information is used for indicating the position of a first resource; wherein the second device stops sending data to the first device on the first resource.

Specifically, the first resource specifically refers to a self-interference channel estimation resource of the first device, and a specific manner for the first device to send the first configuration information to the second device may be sending to the second device separately, or sending in a broadcast manner. And after receiving the first configuration information, the second equipment does not send any data or signaling to the first equipment at the time-frequency resource which is the same as the position information of the first resource.

And 102, the first device performs self-interference channel estimation on the first resource and acquires a self-interference channel.

Specifically, through the mode configuration in step 101, in the process of performing self-interference channel estimation by the first device, the signal data sent by the second device is a noise signal relative to the signal data sent by the first device itself, and has a certain influence on the self-interference channel estimation performed by the first device.

The self-interference channel estimation performed by the first device at the first resource may adopt a Least-squares (LS) algorithm or a Least Mean Square (LMS) algorithm, etc., to obtain a self-interference channel, where the self-interference channel may specifically be a self-interference channel value, that is, the self-interference channel is used to reflect the characteristics of the amplitude, the phase, etc. of the self-interference channel.

Further, step 102 may specifically be: the first device sending a test sequence to the first device on the first resource; the first device receives a test sequence sent by the first device on the first resource; and the first equipment carries out self-interference channel estimation according to the test sequence and acquires a self-interference channel.

Specifically, the first device sends a test sequence at the self-interference channel estimation resource, and the same-frequency first device receives the test sequence sent by itself, that is, the first device may only receive its test sequence on the self-interference channel estimation resource, and then the first device may use the sent test sequence and the received test sequence as inputs, and perform self-interference channel estimation by using an LS algorithm or an LMS algorithm to obtain a self-interference channel of the first device. It should be noted that, since the test sequence received by the first device may be different from the test sequence sent by the first device itself, the above operation needs to be performed to acquire the self-interference channel, so as to facilitate accurate self-interference signal cancellation.

Step 103, when the first device receives the data sent by the second device in the full duplex mode, the first device performs self-interference cancellation by using the self-interference channel.

Specifically, the first device performs self-interference cancellation on other resources that are not self-interference channel estimation resources by using the self-interference channel.

Further, the self-interference cancellation performed by the first device in step 103 using the self-interference channel may specifically be: the first equipment acquires a self-interference signal according to the self-interference channel and data sent by the first equipment; the first equipment carries out self-interference elimination on the signal data received by the first equipment according to the self-interference signal; the data received by the first device includes data sent by the first device and data sent by the second device.

Specifically, since the first device operates in the full-duplex mode, the data received by the first device includes data sent by the second device and data sent by the first device itself, and the first device needs to eliminate the data sent by the first device itself.

Further, the first Resource includes a plurality of Resource Elements (REs), and a time interval or a frequency interval between the REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation condition of a self-interference channel. Specifically, the denser the first resource is distributed in the frequency domain, the higher the accuracy of the self-interference channel estimation is, and the denser the first resource is distributed in the time domain, the higher the dynamic tracking performance is. However, the more the first resource, the lower the data transmission amount, so the distribution density of the first resource needs to be set appropriately according to the needs. In addition, the distribution density of the first resource can also consider the cooperative processing among the antenna interference elimination, the radio frequency interference elimination and the digital interference elimination of the embodiment of the invention, thereby realizing the maximization of the overall interference elimination performance. The change condition of the self-interference channel specifically refers to the change of the channel of the device caused by the relative movement of objects in the surrounding environment of the device, and the change of the channel can refer to the change of the amplitude characteristic, the phase characteristic and the like of the channel, namely when the self-interference channel changes rapidly, the first resource is required to be distributed more densely in the time domain, even if the dynamic tracking performance of the first resource is improved, when the self-interference channel changes slowly, the first resource can be distributed sparsely in the time domain, namely the dynamic tracking performance can be reduced, and the waste of resources is avoided.

In this embodiment, the first device sends the first configuration information to the second device, where the first configuration information is used to indicate the location of the first resource, so that the second device does not send any data or signaling to the first device at the first resource according to the first configuration information, and the first device may accurately perform self-interference channel estimation on the first resource, thereby better completing self-interference cancellation.

Fig. 5 is a flowchart of a second embodiment of a self-interference cancellation method of the present invention, where the difference between this embodiment and the embodiment shown in fig. 4 is that the first configuration information of this embodiment is also used to indicate a location of a second resource, where the second resource is a muting resource of the first device, and as shown in fig. 5, the method of this embodiment may include:

step 201, the first device sends first configuration information to the second device, where the first configuration information is used to indicate a location of the first resource and a location of the second resource.

Wherein, on the first resource, the second device stops sending data to the first device, and on the second resource, the first device stops sending data to the second device.

It should be noted that, the first configuration information is used to indicate the location of the first resource and the location of the second resource, and a specific implementation manner may be that the first configuration information may be sent from the first device to the second device in the form of one message, or the first configuration information is only used to indicate the location of the first resource and sent from the first device to the second device in the form of one message, and the other first configuration information is only used to indicate the location of the second resource and sent from the first device to the second device in the form of another message.

Specifically, the first device does not send any data or signaling to the second device on the second resource, the second device does not send any data or signaling to the first device on the first resource, that is, after the second device receives the first configuration information, the second device does not send any data or signaling to the first device on the time-frequency resource with the same position as the first resource, and the second device performs self-interference channel estimation of the second device on the time-frequency resource with the same position as the second resource.

Step 202, the first device receives, on a first resource, a test sequence sent by the first device.

And 203, the first device performs self-interference channel estimation according to the sent test sequence and the received test sequence, and acquires a self-interference channel.

Step 204, when the first device receives the data sent by the second device in the full duplex mode, the first device performs self-interference cancellation by using the self-interference channel.

It should be noted that the second device may also complete self-interference channel estimation of the second device itself on the second resource, so that the same processing as in steps 202 to 204 may also be performed to implement self-interference cancellation of itself. Therefore, the simultaneous same-frequency transmission of the uplink data and the downlink data between the first equipment and the second equipment can well complete interference elimination.

In this embodiment, the first device sends the first configuration information to the second device, where the first configuration information is used to indicate the location of the first resource and the location of the second resource, so that the second device does not send any data or signaling to the first device at the time-frequency resource at the same location as the first resource of the first device according to the first configuration information, and the first device may perform self-interference channel estimation at the first resource accurately, or the second device may perform self-interference channel estimation at the time-frequency resource at the same location as the second resource of the first device accurately according to the first configuration information, thereby achieving simultaneous uplink and downlink data transmission between devices and better achieving co-frequency interference cancellation.

Fig. 6 is a flowchart of a third embodiment of a self-interference cancellation method of the present invention, where the difference between this embodiment and the embodiment shown in fig. 4 is that a first device of this embodiment further receives second configuration information sent by a second device, and this embodiment is another implementable manner of the embodiment shown in fig. 5, and as shown in fig. 6, the method of this embodiment may include:

step 301, a first device sends first configuration information to a second device, wherein the first configuration information is used for indicating the position of a first resource; wherein the second device stops sending data to the first device on the first resource.

For a detailed explanation of step 301, refer to step 101 in the embodiment shown in fig. 4, which is not described herein again.

Step 302, the first device receives second configuration information sent by the second device, where the second configuration information is used to indicate a location of a third resource.

Specifically, the third resource is a self-interference channel estimation resource of the second device, and correspondingly is a muting resource of the first device, which is different from the configuration of the first device itself to generate the muting resource in the embodiment shown in fig. 5, the first device of this embodiment receives second configuration information sent by the second device, where the second configuration information is used to indicate a position of the third resource, on the third resource, the first device stops sending data to the second device, that is, the position of the third resource is generated by the second device, the second device may perform self-interference channel estimation on the third resource, and at a time-frequency resource of the first device at a same position as the third resource of the second device, the first device does not send any data to the second device.

Step 303, the first device stops sending data to the second device on the third resource according to the second configuration information.

Specifically, the first device does not send any data or signaling to the second device on the third resource, the second device does not send any data or signaling to the first device on the first resource, that is, after the second device receives the first configuration information, the second device does not send any data or signaling to the first device on the time-frequency resource that is the same as the location information of the first resource, and after the first device receives the second configuration information, the first device does not send any data or signaling to the second device on the time-frequency resource that is the same as the location information of the third resource.

Step 304, the first device receives the test sequence sent by the first device on the first resource.

And 305, the first device performs self-interference channel estimation according to the sent test sequence and the received test sequence, and acquires a self-interference channel.

Step 306, when the first device receives the data sent by the second device in the full duplex mode, the first device performs self-interference cancellation by using the self-interference channel.

It should be noted that the second device may also complete self-interference channel estimation of the second device itself at the third resource, so that the same processing as in steps 304 to 306 may also be performed to implement self-interference cancellation of the second device itself. Therefore, the simultaneous same-frequency transmission of the uplink data and the downlink data between the first equipment and the second equipment can well complete interference elimination.

Optionally, the third resource includes multiple REs, and a time interval or a frequency-domain interval between the multiple REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation of the self-interference channel.

In this embodiment, the first device sends, to the second device, first configuration information, where the first configuration information is used to indicate a location of the first resource, and the first device further receives, from the second device, second configuration information sent by the second device, where the second configuration information is used to indicate a location of a third resource, where the first device stops sending data to the second device on the third resource, so that the second device does not send any data or signaling to the first device at a time-frequency resource at the same location as the first resource of the first device according to the first configuration information, and the first device may perform self-interference channel estimation at the first resource accurately, or may cause the first device not to send any data or signaling to the second device at a time-frequency resource at the same location as the third resource of the second device according to the second configuration information, so that the second device may perform self-interference channel estimation of the second device accurately at the third resource, therefore, the interference elimination can be well completed by the simultaneous same-frequency transmission of the uplink data and the downlink data between the devices.

Fig. 7 is a flowchart of a fourth embodiment of the self-interference cancellation method of the present invention, where an execution main body of the embodiment is a second device, and as shown in fig. 7, the method of the embodiment may include:

step 401, the second device receives first configuration information sent by the first device, where the first configuration information is used to indicate a location of the first resource.

Step 402, the second device stops sending data to the first device on the first resource.

In this embodiment, the second device receives first configuration information sent by the first device, where the first configuration information is used to indicate a location of the first resource, and the second device stops sending any data or signaling to the first device on the first resource according to the first configuration information, so that the first device can accurately perform self-interference channel estimation on the first resource, and thus self-interference cancellation is better completed.

Fig. 8 is a flowchart of a fifth embodiment of a self-interference cancellation method of the present invention, and the difference between this embodiment and the embodiment shown in fig. 7 is that the first configuration information of this embodiment is further used to indicate a location of the second resource, and as shown in fig. 8, the method of this embodiment may include:

step 501, the second device receives first configuration information sent by the first device, where the first configuration information is used to indicate a location of the first resource and a location of the second resource.

Step 502, the second device stops sending data to the first device on the first resource according to the first configuration information.

Step 503, the second device receives, on the second resource, the test sequence sent by the second device according to the first configuration information, and the second device performs self-interference channel estimation on the second resource according to the sent test sequence and the received test sequence, and acquires a self-interference channel.

Wherein the first device stops sending data to the second device on the second resource.

Step 504, when the second device receives the data sent by the first device in the full duplex mode, the second device performs self-interference cancellation by using the self-interference channel.

In this embodiment, the second device sends, by receiving the first configuration information sent by the first device, the first configuration information used for indicating a position of the first resource and a position of the second resource, the second device does not send any data or signaling to the first device on the first resource according to the first configuration information, so that the first device can accurately perform self-interference channel estimation on the first resource, on the second resource, the first device does not send any data or signaling to the second device, and the second device can accurately complete self-interference channel estimation of the second device on the second resource according to the first configuration information, thereby achieving simultaneous co-frequency transmission of uplink and downlink data between devices and better achieving interference cancellation.

Fig. 9 is a flowchart of a sixth embodiment of a self-interference cancellation method of the present invention, and the difference between this embodiment and the embodiment shown in fig. 7 is that the second device of this embodiment further sends second configuration information to the first device, and as shown in fig. 9, the method of this embodiment may include:

step 601, the second device receives first configuration information sent by the first device, where the first configuration information is used to indicate a location of the first resource.

Step 602, the second device stops sending data to the first device on the first resource according to the first configuration information.

Step 603, the second device sends second configuration information to the first device, where the second configuration information is used to indicate a location of a third resource, where on the third resource, the first device stops sending data to the second device.

It should be noted that step 601 and step 603 may be performed in parallel, and are not limited to the above sequence.

Step 604, the second device performs self-interference channel estimation of the second device on the third resource, and obtains a self-interference channel.

Step 605, when the second device receives the data sent by the first device in the full duplex mode, the second device performs self-interference cancellation by using the self-interference channel.

Specifically, the second device obtains a self-interference signal according to the self-interference channel and data sent by the second device; and the second equipment carries out self-interference elimination on the data received by the second equipment according to the self-interference signal.

In this embodiment, the second device sends, by receiving the first configuration information, the first configuration information used for indicating the location of the first resource, and also sends, to the first device, the second configuration information used for indicating the location of the third resource, on the third resource, the first device stops sending data to the second device, and the second device does not send any data or signaling to the first device on the first resource according to the first configuration information, so that the first device can accurately perform self-interference channel estimation on the first resource, or can make the first device not send any data or signaling to the second device on a time-frequency resource at the same location as the third resource of the second device according to the second configuration information, so that the second device can accurately perform self-interference channel estimation of the second device on the third resource, therefore, the interference elimination can be well completed by the simultaneous same-frequency transmission of the uplink data and the downlink data between the devices.

A specific embodiment is used to specifically explain how to use the self-interference cancellation method of the embodiment of the present invention to complete interference cancellation in the application scenario shown in fig. 1.

Fig. 10 is a signaling interaction diagram of a seventh embodiment of a self-interference cancellation method according to the present invention, where a communication device a in the embodiment of the present invention may correspond to a first device in the embodiment shown in fig. 4, and a communication device B may correspond to a second device in the embodiment shown in fig. 4, it may be understood that the communication device a may also correspond to the second device in the embodiment shown in fig. 4, and the communication device B may correspond to the first device in the embodiment shown in fig. 4, which is only schematically explained here, as shown in fig. 6, the method in the embodiment may include:

s701: the communication device a transmits resource pattern configuration information to the communication device B.

Wherein the resource mode configuration information includes location information of a self-interference channel estimation resource and location information of a silence resource. The self-interference channel estimation resource is used for the communication device A to perform self-interference channel estimation on the resource, and the silence resource is used for the communication device B to perform self-interference channel estimation on the opposite terminal. Specifically, the distribution density of the self-interference channel estimation resources and the distribution density of the silence resources may be flexibly set according to requirements. The same principle is that the more densely distributed the self-interference channel estimation resources are in the frequency domain, the higher the accuracy of the self-interference channel estimation is, the more densely distributed the self-interference channel estimation is in the time domain, and the higher the dynamic tracking performance is. However, if the resources of both are distributed too densely, the amount of data transmission becomes low, and therefore, it is necessary to make appropriate settings in accordance with actual circumstances. Several resource distribution examples are selected for illustration in the present embodiment.

Fig. 11 is a schematic diagram of a first embodiment of resource distribution of a self-interference cancellation method of the present invention, fig. 12 is a schematic diagram of a second embodiment of resource distribution of a self-interference cancellation method of the present invention, fig. 13 is a schematic diagram of a third embodiment of resource distribution of a self-interference cancellation method of the present invention, fig. 11 to fig. 13 show different distribution situations of self-interference channel estimation resources and silence resources, a minimum square grid in the diagram represents a minimum time-frequency resource block, as shown in the figure, time-frequency resources of a communication device B at the same position as self-interference channel estimation resources of a communication device a are silence resources, and time-frequency resources of a communication device B at the same position as silence resources of a communication device a are self-interference channel estimation resources. Fig. 11 to fig. 13 show the resource distribution in units of the smallest time-frequency resource block, which is a more detailed resource distribution.

Specifically, as shown in fig. 11, the distribution manner of the self-interference channel estimation resources and the muting resources of the communication device a is specifically, here, by way of illustrative example, an LTE system is used, that is, the size of the time-frequency resource of a minimum square in fig. 11 is 1/14ms × 15kHZ, and the time-frequency resources of different frequency domains in the same time domain are the self-interference channel estimation resources or the muting resources, as shown in fig. 11, in the same time domain (a first column shown in fig. 11), the self-interference channel estimation resources are evenly distributed in the time domain at three intervals of 15kHZ, and in an adjacent time domain (a second column shown in fig. 11), the muting resources are evenly distributed in the time domain at three intervals of 15kHZ, and further, in a time domain (a 5 th column shown in fig. 11) spaced 3 1/14ms apart from the first column, the self-interference channel estimation resources are evenly distributed in the time domain, in the adjacent time domain (column 5 shown in fig. 11), the silence resources are evenly distributed in the time domain at three intervals of 15kHZ, and so on, each self-interference channel estimation resource and each silence resource are distributed according to the above rule, and each self-interference channel estimation resource and each silence resource are evenly distributed. The distribution mode can enable the self-interference channel estimation accuracy, the dynamic tracking performance and the data transmission quantity of the communication device A to be at a better level, namely the resource distribution mode with compromise performance of the three aspects.

Specifically, as shown in fig. 12, the distribution manner of the self-interference channel estimation resources and the silence resources of the communication device a is specifically that, in the same time domain (the first column shown in fig. 12), all the frequency domain resources are the silence resources, in the time domain (the fifth column shown in fig. 12) separated from the time domain by 3 1/14ms, all the frequency domain resources are the self-interference channel estimation resources, further, in the time domain (the 12 th column shown in fig. 12) separated from the first column by 10 time intervals of 3 time intervals of 1/14ms, all the frequency domain resources are the silence resources, in the time domain (the 16 th column shown in fig. 12) separated from the time domain by 3 time intervals of 1/14ms, all the frequency domain resources are the self-interference channel estimation resources, and so on, and each self-interference channel estimation resource and each silence resource are distributed according to the rule. In such a distribution manner, since the frequency domain distribution of the self-interference channel estimation resources is dense, the accuracy of the self-interference channel estimation of the communication device a is high, and since the time domain distribution of the self-interference channel estimation resources is sparse, the dynamic tracking performance of the communication device a is not high.

Specifically, as shown in fig. 13, the self-interference channel estimation resources and the silence resources of the communication device a are distributed in a manner that the time-frequency resources of all time domains in the same frequency domain are the self-interference channel estimation resources or the silence resources, as shown in fig. 13, in the same frequency domain (first row shown in fig. 13), all the time domain resources are muted resources, in the frequency domain (row 4 shown in fig. 13) separated from the frequency domain by 2 15kHZ, all the time domain resources are self-interference channel estimation resources, and further, in the frequency domain (line 7 shown in fig. 13) spaced 5-15 kHZ apart from the first line, all time domain resources are silent resources, in the frequency domain (the 10 th row shown in fig. 13) which is separated from the frequency domain by 2 15kHZ, all the time domain resources are self-interference channel estimation resources, and so on, and each self-interference channel estimation resource and each silence resource are distributed according to the above rule. In such a distribution manner, the self-interference channel estimation resources are distributed densely in the time domain, so that the dynamic tracking performance of the communication device a is high, while the self-interference channel estimation resources are distributed sparsely in the frequency domain, so that the self-interference channel estimation accuracy of the communication device a is not high, and the self-interference channel estimation resources and the silence resources occupy more time-frequency resources, so that the data transmission amount is low.

Certainly, the self-interference channel estimation resources and the silence resources may have other distribution manners, for example, fig. 14 is a schematic diagram of a fourth embodiment of resource distribution of the self-interference cancellation method of the present invention, as shown in fig. 14, fig. 14 shows resource distribution using whole subframe resources as a unit, a specific distribution case may be as shown in fig. 14, which is the same as fig. 10 to fig. 13, one subframe of the communication device a is the self-interference channel estimation resources, then a subframe of the communication device B at the same time-frequency position as the subframe is the silence resources, and a subframe of the communication device a is the silence resources, then a subframe of the communication device B at the same time-frequency position as the subframe is the self-interference channel estimation resources, which is different from fig. 10 to fig. 13, the self-interference channel estimation resources of fig. 14 have a larger granularity, and the time-frequency resources at an interval of 1ms are all the self-interference channel estimation resources, such a distribution pattern has a lower data transfer amount than the distribution patterns shown in fig. 10 to 13.

S702: the communication device a sends a test sequence at the self-interference channel estimation resource according to the resource mode configuration information.

S703: communication device a performs self-interference channel estimation at a self-interference channel estimation resource.

S704: the communication device B sends the test sequence at the silent resource according to the resource pattern configuration information.

S705: communication device B performs self-interference channel estimation at the muted resources.

S702 and S703, and S704 and S705 may be performed simultaneously, and the order is not limited herein.

S706: the communication device a and the communication device B perform self-interference cancellation, respectively.

S707: and the uplink and downlink data of the communication equipment A and the communication equipment B are simultaneously transmitted at the same frequency.

In this embodiment, the communication device a sends resource mode configuration information to the communication device B, where the resource mode configuration information includes location information of each interference channel estimation resource and location information of each silence resource, so that the communication device B does not send any data or signaling to the first device at each interference channel estimation resource according to the resource mode configuration information, and the communication device a can accurately perform self-interference channel estimation at each interference channel estimation resource, and also can accurately complete self-interference channel estimation at each silence resource according to the resource mode configuration information, thereby achieving interference cancellation that uplink and downlink data are simultaneously transmitted at the same frequency between devices, and thus improving dynamic performance and static performance of a full-duplex system.

A specific embodiment is used to specifically explain how to use the self-interference cancellation method of the embodiment of the present invention to complete interference cancellation in the application scenario shown in fig. 2.

Fig. 15 is a signaling interaction diagram of an eighth embodiment of the self-interference cancellation method of the present invention, where for a downlink direction, a relay in the embodiment of the present invention may correspond to a first device in the embodiment shown in fig. 1, a base station may correspond to a second device in the embodiment shown in fig. 1, and for an uplink direction, a relay may correspond to the first device in the embodiment shown in fig. 1, and a terminal may correspond to the second device in the embodiment shown in fig. 1, as shown in fig. 15, the method in this embodiment may include:

s801: the relay sends resource pattern configuration information to the base station.

The resource mode configuration information includes location information of respective interference channel estimation resources, and specifically, the distribution density of the self-interference channel estimation resources may be flexibly set according to requirements, where the self-interference channel estimation resources are used for self-interference channel estimation on the resources, and the base station receives the resource mode configuration information and sets resources at the same location as the respective interference channel estimation resources as silent resources, that is, the base station does not send any data or signaling to the relay at a location that is at the same frequency as the self-interference channel estimation resources of the relay. The more densely distributed the resources of the self-interference channel estimation of the relay on the frequency domain, the higher the accuracy of the self-interference channel estimation, and the more densely distributed the resources on the time domain, the higher the dynamic tracking performance. However, if the resource distribution is too dense, the amount of data transmission becomes low, and therefore, it is necessary to make appropriate settings in accordance with actual situations. Several resource distribution examples are selected for illustration in the present embodiment.

Fig. 16 is a schematic diagram of a fifth embodiment of resource distribution of a self-interference cancellation method of the present invention, fig. 17 is a schematic diagram of a sixth embodiment of resource distribution of a self-interference cancellation method of the present invention, fig. 18 is a schematic diagram of a seventh embodiment of resource distribution of a self-interference cancellation method of the present invention, fig. 16 to fig. 18 show different distribution situations of self-interference channel estimation resources of a relay and silent resources of a base station in a downlink direction, a minimum square grid in the drawing represents a minimum time-frequency resource block, and as shown in the drawing, time-frequency resources of the base station at the same position as the self-interference channel estimation resources of the relay are silent resources. Fig. 16 to 18 show the resource distribution in units of the minimum time-frequency resource block, which is a more refined resource distribution.

Specifically, according to the analysis of the implementation scenario shown in fig. 2, it is known that only the relay needs to perform self-interference cancellation in this embodiment, as shown in fig. 16, a distribution manner of self-interference channel estimation resources of the relay is specifically illustrated by an LTE system, that is, a size of a time-frequency resource of a minimum square in fig. 16 is 1/14ms × 15kHZ, in the same time domain (a first column shown in fig. 16), the self-interference channel estimation resources are evenly distributed in the time domain at three intervals of 15kHZ, and further, in a time domain (a 5 th column shown in fig. 16) which is 3 intervals of 1/14ms from the first column, the self-interference channel estimation resources are evenly distributed in the time domain at three intervals of 15kHZ, and so on, each self-interference channel estimation resource is evenly distributed according to the rule. The distribution mode can enable the performances of the three aspects of the accuracy and the dynamic tracking performance of the self-interference channel estimation of the relay and the data transmission quantity to be at a better level, namely the resource distribution mode with the compromise of the performances of the three aspects.

Specifically, as shown in fig. 17, the distribution manner of the self-interference channel estimation resources of the relay is specifically that time-frequency resources of all frequency domains in the same time domain are self-interference channel estimation resources, as shown in fig. 17, in the same time domain (the first column shown in fig. 17), all frequency-domain resources are self-interference channel estimation resources, and in a time domain (the 12 th column shown in fig. 17) separated from the time domain by 10 1/14ms, all frequency-domain resources are self-interference channel estimation resources, and so on, each self-interference channel estimation resource is distributed according to the above rule. In such a distribution mode, the self-interference channel estimation resources are distributed in a dense frequency domain, so that the accuracy of the self-interference channel estimation of the relay is high, and the self-interference channel estimation resources are distributed in a sparse time domain, so that the dynamic tracking of the relay is not high.

Specifically, as shown in fig. 18, the distribution manner of the self-interference channel estimation resources of the relay is specifically that time-frequency resources of all time domains in the same frequency domain are self-interference channel estimation resources, as shown in fig. 18, in the same frequency domain (the first row shown in fig. 18), all time-domain resources are self-interference channel estimation resources, and in a frequency domain (the 7 th row shown in fig. 18) separated from the frequency domain by 5 15kHZ, all time-domain resources are self-interference channel estimation resources, and so on, each self-interference channel estimation resource is distributed according to the above rule. In such a distribution mode, the dynamic tracking performance of the relay is high due to dense time domain distribution of the self-interference channel estimation resources, and the accuracy of the self-interference channel estimation of the relay is low due to sparse frequency domain distribution of the self-interference channel estimation resources.

Certainly, the self-interference channel estimation resources of the relay may also have other distribution manners, for example, fig. 19 is a schematic diagram of an eighth resource distribution embodiment of the self-interference cancellation method of the present invention, as shown in fig. 19, fig. 19 shows resource distribution using the whole subframe resource as a unit, a specific distribution situation may be as shown in fig. 19, which is the same as fig. 16 to 18, where one subframe of the relay is the self-interference channel estimation resource, and then the subframe of the base station at the same frequency position as the subframe is the silence resource. It can be understood that the granularity of the self-interference channel estimation resource may also be flexibly set according to the requirement, different from fig. 16 to 18, the granularity of the self-interference channel estimation resource in fig. 19 is larger, and time-frequency resources with an inter-domain interval of 1ms are all self-interference channel estimation resources, and such a distribution mode is lower in data transmission amount and poorer in dynamic tracking performance than the distribution modes shown in fig. 16 to 18.

S801': the relay sends resource mode configuration information to the terminal.

Wherein the resource pattern configuration information includes location information of respective interference channel estimation resources. For a specific implementation, refer to S801, which is not described herein again. After the execution of S801 or S801' is completed, S802 to S804 are executed. The difference is that thereafter, the downstream direction executes S805, and the upstream direction executes S805'.

S802: the relay sends a test sequence at the self-interference channel estimation resource according to the resource mode configuration information.

S803: the relay performs self-interference channel estimation at a self-interference channel estimation resource.

S804: the relay performs self-interference cancellation.

S805: and the base station transmits downlink data to the relay.

S805': and the terminal transmits uplink data to the relay.

In this embodiment, the relay sends the resource mode configuration information to the base station, where the resource mode configuration information includes the location information of each interference channel estimation resource, so that the base station does not send any data or signaling to the relay at each interference channel estimation resource according to the resource mode configuration information, and the relay can accurately perform self-interference channel estimation at each interference channel estimation resource, thereby better completing self-interference cancellation, and improving the dynamic performance and static performance of the full-duplex system.

A specific embodiment is used to specifically explain how to use the self-interference cancellation method of the embodiment of the present invention to complete interference cancellation in the application scenario shown in fig. 3.

Fig. 20 is a signaling interaction diagram of a ninth embodiment of the self-interference cancellation method of the present invention, where a base station in the embodiment of the present invention may correspond to a first device in the embodiment shown in fig. 1, and a terminal 2 may correspond to a second device in the embodiment shown in fig. 1, as shown in fig. 20, the method in this embodiment may include:

s901: the base station transmits resource pattern configuration information to terminal 2.

Specifically, the distribution density of the self-interference channel estimation resources can be flexibly set according to requirements, wherein the self-interference channel estimation resources are used for self-interference channel estimation of the base station on the resources, the terminal 2 receives the resource mode configuration information, sets the resources at the same positions as the respective interference channel estimation resources as silent resources, and the terminal 2 does not send any data or signaling to the base station at the position having the same frequency as the self-interference channel estimation resources of the base station. The more densely distributed the self-interference channel estimation resources of the base station are in the frequency domain, the higher the accuracy of the self-interference channel estimation is, and the more densely distributed the self-interference channel estimation resources in the time domain, the higher the dynamic tracking performance is. However, if the resource distribution is too dense, the amount of data transmission becomes low, and therefore, it is necessary to make appropriate settings in accordance with actual situations. Several resource distribution examples are selected for illustration in the present embodiment.

Fig. 21 is a schematic diagram of a ninth embodiment of resource distribution of the self-interference cancellation method of the present invention, fig. 22 is a schematic diagram of a tenth embodiment of resource distribution of the self-interference cancellation method of the present invention, fig. 23 is a schematic diagram of an eleventh embodiment of resource distribution of the self-interference cancellation method of the present invention, fig. 21 to fig. 23 show different distribution situations of self-interference channel estimation resources of a base station and silent resources of a terminal 2, where a minimum square grid in the diagram represents a minimum time-frequency resource block, and as shown in the figure, time-frequency resources of the terminal 2 at the same position as the self-interference channel estimation resources of the base station are silent resources. Fig. 21 to 23 show the resource distribution in units of the smallest time-frequency resource block, which is a more detailed resource distribution.

Specifically, according to the analysis of the implementation scenario shown in fig. 3, it is known that only the base station needs to perform self-interference cancellation in this embodiment, as shown in fig. 21, a distribution manner of self-interference channel estimation resources of the base station is specifically illustrated by an LTE system, where a size of a time-frequency resource of a minimum square in fig. 21 is 1/14ms × 15kHZ, and in the same time domain (a first column shown in fig. 21), the self-interference channel estimation resources are evenly distributed in the time domain at three intervals of 15kHZ, and further, in a time domain (a 5 th column shown in fig. 21) which is 3 intervals of 1/14ms from the first column, the self-interference channel estimation resources are evenly distributed in the time domain at three intervals of 15kHZ, and so on. The distribution mode can enable the self-interference channel estimation accuracy and dynamic tracking performance of the base station to be higher, and the data transmission quantity to be in a better level, namely, the resource distribution mode with compromise in the three performances.

Specifically, as shown in fig. 22, the distribution manner of the self-interference channel estimation resources of the base station is specifically that the time-frequency resources of all frequency domains of the same time domain are self-interference channel estimation resources, as shown in fig. 22, in the same time domain (the first column shown in fig. 22), all frequency domain resources are self-interference channel estimation resources, and in a time domain (the 12 th column shown in fig. 22) separated from the time domain by 10 1/14ms, all frequency domain resources are self-interference channel estimation resources, and so on, each self-interference channel estimation resource is distributed according to the above rule. In such a distribution mode, the self-interference channel estimation resources are distributed in a dense frequency domain, so that the accuracy of the self-interference channel estimation of the base station is high, and the self-interference channel estimation resources are distributed in a sparse time domain, so that the dynamic tracking of the base station is not high.

Specifically, as shown in fig. 23, the distribution manner of the self-interference channel estimation resources of the base station is specifically that time-frequency resources of all time domains in the same frequency domain are self-interference channel estimation resources, as shown in fig. 23, in the same frequency domain (the first row shown in fig. 23), all time-domain resources are self-interference channel estimation resources, and in a frequency domain (the 7 th row shown in fig. 23) separated from the frequency domain by 5 15kHZ, all time-domain resources are self-interference channel estimation resources, and so on, each self-interference channel estimation resource is distributed according to the above rule. In such a distribution mode, the self-interference channel estimation resources are distributed densely in the time domain, so that the dynamic tracking performance of the base station is high, and the self-interference channel estimation resources are distributed sparsely in the frequency domain, so that the accuracy of the self-interference channel estimation of the base station is not high.

Certainly, the self-interference channel estimation resources of the base station may also have other distribution manners, for example, fig. 24 is a schematic view of twelve resource distribution implementation of the self-interference cancellation method of the present invention, as shown in fig. 24, fig. 24 shows resource distribution using the whole subframe resource as a unit, a specific distribution situation may be as shown in fig. 24, which is the same as fig. 21 to fig. 23, where one subframe of the base station is the self-interference channel estimation resource, and then, the subframe of the terminal 2 at the same frequency position as the subframe is the silent resource. It can be understood that the granularity of the self-interference channel estimation resource can also be flexibly set according to the requirement, different from fig. 21 to 23, the granularity of the self-interference channel estimation resource in fig. 24 is larger, and time-frequency resources with an interval of 1ms between domains are all self-interference channel estimation resources, and such a distribution mode is lower in data transmission amount and poorer in dynamic tracking performance than the distribution modes shown in fig. 21 to 23.

In summary, the granularity and the distribution of the self-interference channel estimation resources may also be flexibly set according to the requirement.

S902: and the base station sends a test sequence at the self-interference channel estimation resource according to the resource mode configuration information.

S903: the base station performs self-interference channel estimation at a self-interference channel estimation resource.

S904: the base station performs self-interference cancellation.

S905: the base station performs downlink data transmission with the terminal 1.

S906: the base station performs uplink data transmission with terminal 2.

In this embodiment, the base station sends the resource mode configuration information to the terminal 2, where the resource mode configuration information includes the location information of each interference channel estimation resource, so that the terminal 2 does not send any data or signaling to the relay on each interference channel estimation resource according to the resource mode configuration information, and the base station can accurately perform self-interference channel estimation on each interference channel estimation resource, thereby better completing self-interference cancellation, and improving the dynamic performance and static performance of the full-duplex system.

Fig. 25 is a schematic structural diagram of a first apparatus according to a first embodiment of the present invention, and as shown in fig. 25, the first apparatus according to this embodiment may include: a sending module 11 and a processing module 12, where the sending module 11 is configured to send first configuration information to a second device, the first configuration information is used to indicate a position of a first resource, where, on the first resource, the second device stops sending data to the first device, the processing module 12 is configured to perform self-interference channel estimation on the first resource and acquire a self-interference channel, and the processing module 12 is further configured to perform self-interference cancellation by using the self-interference channel when the first device receives data sent by the second device in a full-duplex mode.

Further, the sending module 11 is further configured to send a test sequence to the first device on the first resource; the first device further includes a receiving module 13, configured to receive the test sequence sent by the sending module 11 on the first resource, and the processing module 12 is specifically configured to perform self-interference channel estimation according to the test sequence and acquire a self-interference channel.

Further, the processing module 12 is configured to perform self-interference cancellation by using the self-interference channel, and specifically may include: acquiring a self-interference signal according to the self-interference channel and the data sent by the sending module 11; performing self-interference cancellation on the signal data received by the receiving module 13 according to the self-interference signal; the data received by the receiving module 13 includes the data sent by the sending module 11 and the data sent by the second device.

Further, in an implementation manner, the first configuration information is further used to indicate a location of a second resource, and the processing module 12 is further used to control the sending module 11 to stop sending data to the second device on the second resource.

In another implementable manner, the receiving module 13 is further configured to receive second configuration information sent by the second device, where the second configuration information is used to indicate a location of a third resource; the processing module 12 is further configured to control the sending module 11 to stop sending data to the second device on the third resource.

Further, the first resource includes a plurality of Resource Elements (REs), and a time interval or a frequency domain interval between the REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation situation of a self-interference channel.

The first device of this embodiment may be configured to execute the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 26 is a schematic structural diagram of a first embodiment of a second device in the present invention, as shown in fig. 26, the second device may include a receiving module 21, a processing module 22, and a sending module 23, where the receiving module 21 is configured to receive first configuration information sent by a first device, the first configuration information is used to indicate a location of a first resource, and the processing module 22 is configured to control the sending module 23 to stop sending data to the first device on the first resource.

Further, in an implementation manner, the first configuration information is further used to indicate a location of a second resource, where on the second resource, the first device stops sending data to the second device, and the processing module 22 is further used to control the sending module 23 to perform self-interference channel estimation of the second device on the second resource, and obtain a self-interference channel.

Further, in another implementation manner, the sending module 23 is configured to send second configuration information to the first device, where the second configuration information is used to indicate a location of a third resource, where on the third resource, the first device stops sending data to the second device; correspondingly, the processing module 22 is configured to perform self-interference channel estimation on the second device on the third resource, and obtain a self-interference channel.

Further, the processing module 22 is further configured to, when the second device receives data sent by the first device in a full duplex mode, obtain a self-interference signal according to the self-interference channel and the data sent by the sending module 23; performing self-interference cancellation on the data received by the receiving module 21 according to the self-interference signal; the data received by the receiving module 21 includes data sent by the first device and data sent by the sending module 23.

Further, the third resource includes a plurality of REs, and a time interval or a frequency domain interval between the plurality of REs is determined by at least one of a requirement of self-interference channel estimation accuracy and a variation situation of a self-interference channel.

The second device of this embodiment may be configured to execute the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.

It should be noted that the receiving module 13 in the embodiment of the present invention may correspond to a receiver of the first device, and may also correspond to a transceiver of the first device. The transmitting module 11 may correspond to a transmitter of the first device, and may also correspond to a transceiver of the first device. The Processing module 12 may correspond to a processor of the first device, where the processor may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits that implement the embodiments of the present invention. The first device may further include a memory for storing instruction codes, and the processor calls the instruction codes of the memory to control the sending module 11 and the receiving module 13 in the embodiment of the present invention to perform the above operations.

The transmitting module 23 in the embodiment of the present invention may correspond to a transmitter of the second device, and may also correspond to a transceiver of the second device. The receiving module 21 may correspond to a receiver of the second device, and may also correspond to a transceiver of the second device. The processing module 22 may correspond to a processor of the second device, where the processor may be a CPU, or an ASIC, or one or more integrated circuits that implement embodiments of the present invention. The second device may further include a memory for storing instruction codes, and the processor calls the instruction codes of the memory to control the sending module 23 and the receiving module 21 in the embodiment of the present invention to perform the above operations.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for self-interference cancellation, comprising:

the method comprises the steps that first equipment sends first configuration information to second equipment, wherein the first configuration information is used for indicating the position of first resources; wherein, on the first resource, the second device stops sending data to the first device; the first resource comprises a plurality of Resource Elements (REs), and the time domain interval or the frequency domain interval among the REs is determined by at least one of the requirement of self-interference channel estimation precision and the change situation of a self-interference channel;

the first equipment carries out self-interference channel estimation on the first resource and acquires a self-interference channel; wherein the first device sends a test sequence to the first device on the first resource; the first device receives the test sequence sent by the first device on the first resource; the first equipment carries out self-interference channel estimation according to the test sequence and obtains a self-interference channel;

and when the first equipment receives the data sent by the second equipment in the full duplex mode, the self-interference channel is utilized to perform self-interference elimination.

2. The method of claim 1, wherein the first device utilizes the self-interference channel for self-interference cancellation, comprising:

3. The method according to any of claims 1 to 2, wherein the first configuration information is further used to indicate a location of the second resource; wherein the first device stops sending data to the second device on the second resource.

4. The method according to any one of claims 1 to 2, further comprising:

5. A method for self-interference cancellation, comprising:

the method comprises the steps that a second device receives first configuration information sent by a first device, wherein the first configuration information is used for indicating the position of a first resource and the position of a second resource; the second resource comprises a plurality of Resource Elements (REs), and the time interval or the frequency domain interval among the REs is determined by at least one of the requirement of self-interference channel estimation precision and the change situation of a self-interference channel;

the second device stops sending data to the first device on the first resource; the first device stops sending data to the second device on the second resource;

the second device performs self-interference channel estimation of the second device on the second resource, and obtains a self-interference channel; and the second device receives the test sequence sent by the second device on the second resource according to the first configuration information, performs self-interference channel estimation on the second resource according to the sent test sequence and the received test sequence, and acquires a self-interference channel.

6. The method of claim 5, further comprising:

7. The method of claim 5 or 6, further comprising:

when the second device receives data sent by the first device in a full duplex mode, acquiring a self-interference signal according to the self-interference channel and the data sent by the second device;

8. The method of claim 6, wherein the third resource comprises a plurality of Resource Elements (REs), and wherein a time interval or a frequency domain interval between the REs is determined by at least one of a requirement for self-interference channel estimation accuracy and a variation of a self-interference channel.

9. A first device, comprising:

a sending module, configured to send first configuration information to a second device, where the first configuration information is used to indicate a location of a first resource; wherein, on the first resource, the second device stops sending data to the first device; the sending module is further configured to send a test sequence to the first device on the first resource; the first resource comprises a plurality of Resource Elements (REs), and the time interval or the frequency domain interval among the REs is determined by at least one of the requirement of self-interference channel estimation precision and the change situation of a self-interference channel;

a receiving module, configured to receive, on the first resource, the test sequence sent by the sending module;

a processing module, configured to perform self-interference channel estimation on the first resource and obtain a self-interference channel; used for carrying out self-interference channel estimation according to the test sequence and obtaining a self-interference channel

10. The first device of claim 9, wherein the processing module performs self-interference cancellation using the self-interference channel, specifically comprising:

11. The first device according to any one of claims 9 to 10, wherein the first configuration information is further configured to indicate a location of a second resource, and the processing module is further configured to control the sending module to stop sending data to the second device on the second resource.

12. The first apparatus according to claim 9 or 10, wherein the receiving module is further configured to receive second configuration information sent by the second apparatus, where the second configuration information is used to indicate a location of a third resource;

13. A second apparatus, comprising:

a receiving module, configured to receive first configuration information sent by a first device, where the first configuration information is used to indicate a location of a first resource and a location of a second resource; on the second resource, the first device stops sending data to the second device; the second resource comprises a plurality of Resource Elements (REs), and the time interval or the frequency domain interval among the REs is determined by at least one of the requirement of self-interference channel estimation precision and the change situation of a self-interference channel;

the processing module is used for controlling the sending module to stop sending data to the first equipment on the first resource;

the processing module is further configured to perform self-interference channel estimation of the second device on the second resource and obtain a self-interference channel; and the second device receives the test sequence sent by the second device on the second resource according to the first configuration information, performs self-interference channel estimation on the second resource according to the sent test sequence and the received test sequence, and acquires a self-interference channel.

14. The second device of claim 13, wherein the sending module is configured to send second configuration information to the first device, and the second configuration information is used to indicate a location of a third resource, where the third resource is where the first device stops sending data to the second device;

15. The second device according to claim 13 or 14, wherein the processing module is further configured to, when the second device receives data sent by the first device in a full duplex mode, obtain a self-interference signal according to the self-interference channel and the data sent by the sending module;

16. The second device of claim 14, wherein the third resource comprises a plurality of Resource Elements (REs), and wherein a time interval or a frequency domain interval between the REs is determined by at least one of a requirement for self-interference channel estimation accuracy and a variation of a self-interference channel.