CN117792539A

CN117792539A - Calibration signal transmission method, device, base station and system

Info

Publication number: CN117792539A
Application number: CN202211142810.1A
Authority: CN
Inventors: 楼梦婷; 吴丹; 金婧; 夏亮; 王启星; 刘光毅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2024-03-29

Abstract

The invention provides a calibration signal transmission method, a device, a base station and a system, wherein the method comprises the steps of sending calibration configuration information to a signal reflecting plate, wherein the calibration configuration information comprises first angle configuration information for reflecting a first calibration signal sent by a first base station to a second base station by the signal reflecting plate and second angle configuration information for reflecting a second calibration signal sent by the second base station to the first base station. According to the method, through the calibration configuration information, channel calibration can be performed based on the signal reflecting plate according to system requirements, so that the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

Description

Calibration signal transmission method, device, base station and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a base station, and a system for transmitting calibration signals.

Background

Distributed ultra-large-scale Multiple-Input Multiple-Output (MIMO) is one solution to the communication requirement of higher capacity of 6G. Through coherent/incoherent transmission of a plurality of Base Stations (BS), the distributed ultra-large-scale MIMO can eliminate interference and improve user experience on one hand, and can improve the total capacity on the other hand, and has wide application prospect in a high-capacity scene.

In a distributed ultra-large-scale MIMO system, a base station needs to know downlink channel information to perform preprocessing on user data. For a time division duplex (Time Division Duplexing, TDD) system, since the transceivers share the same propagation channel (the same frequency), it can be theoretically considered that the uplink propagation channel is equal to the downlink propagation channel, that is, the uplink channel and the downlink channel have reciprocity. However, in a physical implementation, the radio frequency end of the antenna requires two sets of circuits to respectively complete the transmission and reception of signals. Because of the process error in hardware and the nonlinear distortion of the amplifier, it is difficult to realize that two circuits at the radio frequency end have identical characteristics, so that the TDD system has challenges that the uplink and downlink channels are not necessarily completely equivalent. In addition, the characteristic response of each radio frequency circuit also varies with environmental (e.g., temperature, humidity, etc.) and time variations. Thus, from the effect on the baseband signal, the equivalent pair of signals of the transmit and receive channels are multiplied by different coefficients, tx and Rx. This results in a loss of reciprocity of the channel. Therefore, calibration of the radio frequency link is required.

The existing air interface calibration scheme generally considers a communication environment with better link quality, but in an actual mobile communication environment, all base stations do not have direct paths, and the two base stations may be far apart, so that the calibration accuracy may be insufficient, and the overall performance of the system may be affected.

Disclosure of Invention

The invention aims to provide a calibration signal transmission method, a device, a base station and a system, which are used for improving the accuracy of air interface calibration and improving the overall performance of the system.

In order to achieve the above object, in a first aspect, the present invention provides a calibration signal transmission method, which is performed by a third base station, comprising:

and transmitting calibration configuration information to the signal reflecting plate, wherein the calibration configuration information comprises first angle configuration information for reflecting a first calibration signal transmitted to the second base station by the first base station by the signal reflecting plate and second angle configuration information for reflecting a second calibration signal transmitted to the first base station by the second base station.

Optionally, the method further comprises:

acquiring first geographic position information of the first base station, second geographic position information of the second base station and position information of the signal reflecting plate;

and obtaining the calibration configuration information according to the first geographic position information, the second geographic position information and the position information of the signal reflecting plate.

Optionally, the first angle configuration information includes a reflection angle value or a codebook of a plurality of angle information, where the reflection angle value or the codebook of a plurality of angle information reflects a first calibration signal sent by the first base station to the second base station by the signal reflection board;

The second angle configuration information includes a reflection angle value or a codebook of a plurality of angle information, which the signal reflection plate reflects a second calibration signal transmitted from the second base station to the first base station.

Optionally, the method further comprises:

receiving a calibration assistance request sent by a reference base station, wherein the reference base station is the first base station or the second base station, the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station sends a first calibration signal to the second base station, and the second time window is a time window when the second base station sends a second calibration signal to the first base station;

synchronizing the first time window and the second time window;

obtaining a first reflection coefficient and a second reflection coefficient, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate in the first time window according to the first angle configuration information, and the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate in the second time window according to the second angle configuration information;

And sending a calibration assistance request acknowledgement, the first reflection coefficient and the second reflection coefficient to the reference base station.

In a second aspect, the present invention also provides a calibration signal transmission method, which is performed by a first base station, including:

under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a first reflection coefficient according to the first angle configuration information, a first calibration signal is sent to a second base station;

receiving a second calibration signal sent by the second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by a third base station.

Optionally, the sending the first calibration signal to the second base station includes:

and in a first time window, transmitting the first calibration signal to the second base station through forwarding of the signal reflecting plate, wherein the first time window is a time window when the first base station transmits the first calibration signal to the second base station.

Optionally, the receiving the second calibration signal sent by the second base station includes:

And in a second time window, receiving a second calibration signal sent by the second base station through forwarding of the signal reflecting plate, wherein the second time window is a time window when the second base station sends the second calibration signal to the first base station.

Optionally, the method further comprises:

acquiring the first reflection coefficient and the second reflection coefficient under the condition that the first base station is a reference base station;

determining a calibration coefficient for the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so that the second base station calibrates a transmitting channel of the second base station according to the calibration coefficient; or,

and sending the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to a server, so that the server determines the calibration coefficient for the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, and the second base station calibrates a transmitting channel of the second base station according to the calibration coefficient.

Optionally, the acquiring the first reflection coefficient and the second reflection coefficient includes:

transmitting a calibration assistance request to the third base station, wherein the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station transmits the first calibration signal to the second base station, and the second time window is a time window when the second base station transmits the second calibration signal to the first base station;

receiving calibration assistance request confirmation, the first reflection coefficient and the second reflection coefficient sent by the third base station, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to the first angle configuration information in the first time window, the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to the second angle configuration information in the second time window, and the first reflection coefficient and the second reflection coefficient are determined by the third base station according to the obtained first angle configuration information and the second angle configuration information.

In a third aspect, the present invention also provides a calibration signal transmission method, performed by a second base station, including:

under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a first reflection coefficient according to the first angle configuration information, a first calibration signal sent by a first base station is received;

under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to second angle configuration information, a second calibration signal is sent to the first base station; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by a third base station.

Optionally, the receiving the first calibration signal sent by the first base station includes:

and in a first time window, receiving the first calibration signal sent by the first base station through forwarding of the signal reflecting plate, wherein the first time window is a time window when the first base station sends the first calibration signal to the second base station.

Optionally, the sending the second calibration signal to the first base station includes:

and in a second time window, transmitting the second calibration signal to the first base station through forwarding of the signal reflecting plate, wherein the second time window is a time window when the second base station transmits the second calibration signal to the first base station.

Optionally, the method further comprises:

acquiring the first reflection coefficient and the second reflection coefficient under the condition that the second base station is a reference base station;

determining a calibration coefficient for the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so that the first base station calibrates a transmitting channel of the first base station according to the calibration coefficient; or,

and sending the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to a server, so that the server determines the calibration coefficient for the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, and the first base station calibrates a transmitting channel of the first base station according to the calibration coefficient.

In a fourth aspect, the present invention also provides a calibration signal transmission device, including:

the first transmitting module is used for transmitting calibration configuration information to the signal reflecting plate, wherein the calibration configuration information comprises first angle configuration information for reflecting a first calibration signal transmitted to the second base station by the first base station by the signal reflecting plate and second angle configuration information for reflecting a second calibration signal transmitted to the first base station by the second base station.

In a fifth aspect, the present invention also provides a calibration signal transmission device, including:

the second transmitting module is used for transmitting a first calibration signal to the second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information;

the first receiving module is used for receiving a second calibration signal sent by the second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by a third base station.

In a sixth aspect, the present invention also provides a calibration signal transmission device, including:

the second receiving module is used for receiving a first calibration signal sent by the first base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a first reflection coefficient according to the first angle configuration information;

the third transmitting module is used for transmitting a second calibration signal to the first base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by a third base station.

In a seventh aspect, the present invention also provides a calibration signal transmission system, including: the system comprises a first base station, a second base station, a third base station and a signal reflecting plate, wherein the third base station is a control base station of the signal reflecting plate, and the first base station executes the calibration signal transmission method according to the first aspect; the second base station performs the calibration signal transmission method as described in the second aspect above; the third base station performs the calibration signal transmission method according to the fir tree third aspect.

In an eighth aspect, the present invention further provides a base station, which is a third base station, including a processor and a transceiver, the transceiver receiving and transmitting data under the control of the processor, the transceiver being configured to:

In a ninth aspect, the present invention further provides a base station, the base station being a first base station, comprising a processor and a transceiver, the transceiver being operable to receive and transmit data under control of the processor, the transceiver being operable to:

In a tenth aspect, the present invention further provides a base station, which is a second base station, comprising a processor and a transceiver, the transceiver receiving and transmitting data under the control of the processor, the transceiver being configured to:

In an eleventh aspect, the present invention also provides a base station, including a memory, a processor, and a program stored on the memory and executable on the processor; the processor, when executing the program, implements the calibration signal transmission method as described in the first aspect above; or performing the calibration signal transmission method as described in the second aspect above; or performing the calibration signal transmission method as described in the third aspect above.

In a twelfth aspect, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps in the calibration signal transmission method as described in the first aspect, or implements the steps in the calibration signal transmission method as described in the second aspect, or implements the steps in the calibration signal transmission method as described in the third aspect.

The technical scheme of the invention has at least the following beneficial effects:

in the embodiment of the invention, the calibration configuration information is sent to the signal reflecting plate, and comprises the first angle configuration information for reflecting the first calibration signal sent to the second base station by the first base station by the signal reflecting plate and the second angle configuration information for reflecting the second calibration signal sent to the first base station by the second base station, so that the channel calibration can be carried out based on the signal reflecting plate according to the system requirement by the calibration configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of the air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

Drawings

FIG. 1 is a flow chart of a calibration signal transmission method according to an embodiment of the invention;

FIG. 2 is a second flow chart of a calibration signal transmission method according to an embodiment of the invention;

FIG. 3 is a third flow chart of a calibration signal transmission method according to an embodiment of the invention;

FIG. 4 is a schematic block diagram of a calibration signal transmission device according to an embodiment of the present invention;

FIG. 5 shows a second block diagram of a calibration signal transmission device according to an embodiment of the invention;

FIG. 6 is a third block diagram of a calibration signal transmission device according to an embodiment of the invention;

FIG. 7 is a schematic diagram of a calibration signal transmission system according to an embodiment of the present invention;

fig. 8 shows one of the schematic structural diagrams of a base station according to an embodiment of the present invention;

FIG. 9 is a second schematic diagram of a base station according to an embodiment of the present invention;

fig. 10 shows a third schematic structure of a base station according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The invention provides a calibration signal transmission method, a device, a base station and a system, aiming at the problems that in the prior art, no direct path exists between two base stations and the accuracy of air interface calibration is low when the distance is far.

Fig. 1 is a schematic flow chart of a calibration signal transmission method according to an embodiment of the present invention. The method is performed by a third base station, which is a control base station of the signal reflecting plate. Wherein the method may comprise:

step 101, calibration configuration information is sent to the signal reflection board, wherein the calibration configuration information comprises first angle configuration information for reflecting a first calibration signal sent by the first base station to the second base station by the signal reflection board and second angle configuration information for reflecting a second calibration signal sent by the second base station to the first base station.

The signal reflecting plate is a panel with a novel intelligent passive Surface, such as a reconfigurable intelligent Surface (Reconfigurable Intellig ent Surface, RIS), an intelligent reflecting Surface (Intelligent Reflecting Surface, IRS) and the like, and the signal reflecting plate controls the phase of the Surface in real time by using a metamaterial (Meta-materials) to control the reflection angle of incident waves and form reflection beams in different directions.

After the signal reflecting plate is connected to the network, the signal reflecting plate is controlled by a third base station, wherein the third base station can also be the first base station or the second base station. The signal reflecting plate may be configured into a calibration mode and a non-calibration mode (default) according to the calibration requirement.

It should be noted that RIS has the characteristics of low cost and low power consumption, and can realize signal forwarding without a complex Radio Frequency (RF) circuit.

When the direct path signal quality between the first base station and the second base station is poor or no direct path exists, the third base station is used for sending calibration configuration information to the signal reflecting plate, so that the signal reflecting plate can intelligently configure a wireless environment through the calibration configuration information, transmission of calibration signals between the first base station and the second base station is facilitated, and therefore the channel calibration of the transceiver end is carried out.

In addition, the signal reflecting plate is flexible to deploy, can be installed on the wall and the ceiling of a building, and is beneficial to improving the overall performance of the distributed ultra-large-scale antenna system.

In an alternative implementation, the method of the embodiment of the present invention may further include:

s11, acquiring first geographic position information of a first base station, second geographic position information of a second base station and position information of a signal reflecting plate.

S12, obtaining calibration configuration information according to the first geographical position information, the second geographical position information and the position information of the signal reflecting plate.

The third base station can obtain calibration configuration information through prior information according to the first geographic position information of the first base station, the second geographic position information of the second base station and the position information of the signal reflecting plate.

Optionally, the first angle configuration information includes a reflection angle value or a codebook of a plurality of angle information, where the reflection angle value reflects a first calibration signal sent from the first base station to the second base station by the signal reflection board.

The second angle configuration information includes a reflection angle value or a codebook of a plurality of angle information by which the signal reflection plate reflects the second calibration signal transmitted from the second base station to the first base station.

s111, receiving a calibration assistance request sent by a reference base station, wherein the reference base station is a first base station or a second base station, the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station sends a first calibration signal to the second base station, and the second time window is a time window when the second base station sends a second calibration signal to the first base station.

S112, synchronizing the first time window and the second time window;

after the third base station is based on the calibration assistance request, the third base station needs to synchronize a time window for transmitting the calibration signal with the reference base station, so that the reflection coefficient of the subsequent signal reflecting plate is adjusted in different corresponding time windows based on corresponding angle configuration information, the purpose of reflecting the calibration signal transmitted between the base stations is achieved, and the transmission of the calibration signal between the first base station and the second base station is facilitated.

S113, obtaining a first reflection coefficient and a second reflection coefficient, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to the first angle configuration information in a first time window, and the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to the second angle configuration information in a second time window.

Here, the first reflection coefficient is denoted as Γ ₁ The second reflection coefficient is denoted as Γ ₂ . It should be noted that Γ ₁ And Γ ₂ The amplitude and the phase of each unit on the controllable signal reflecting plate are the same as the dimension of the diagonal array and the number of units on the signal reflecting plate.

And starting a calibration mode by the signal reflecting plate in a time window for transmitting the calibration signal, namely acquiring a first reflection coefficient by the signal reflecting plate according to the first angle configuration information in a first time window for transmitting the first calibration signal, and adjusting the amplitude and the phase of each unit on the signal reflecting plate according to the first reflection coefficient. And in a second time window of the second calibration signal transmission, the signal reflecting plate obtains a second reflection coefficient according to the second angle configuration information, and the amplitude and the phase of each unit on the signal reflecting plate are adjusted according to the second reflection coefficient.

And S114, transmitting a calibration assistance request confirmation, a first reflection coefficient and a second reflection coefficient to the reference base station.

It should be noted that, the purpose of sending the quasi-assistance request acknowledgement, the first reflection coefficient and the second reflection coefficient to the reference base station is to make the reference base station calculate the corresponding calibration coefficient of the base station to be calibrated based on the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, or make the reference base station send the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to the server (calculation center), and make the server calculate the corresponding calibration coefficient of the base station to be calibrated based on the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so as to instruct the base station to be calibrated to calibrate the transmitting channel of the base station to be calibrated according to the calibration coefficient.

It should be noted that, after the base station to be calibrated finishes calibration, the third base station may control the signal reflection plate to switch from the calibration mode to the non-calibration mode. When the signal reflecting plate is in a non-calibration mode, the signal reflecting plate can provide data transmission service for a terminal or other base stations.

In addition, when the first base station and the second base station in the communication environment have good direct paths, the calibration working mode of the signal reflecting plate can be closed. Whether the calibration working mode is switched or not can be judged according to network requirements. For example, after calibration based on the signal reflecting plate is completed, the distributed transmission performance always exceeds the threshold TH (for example, the first base station and the second base station may recover good direct paths in the communication environment) in a period of time for subsequent continuous observation, and at this time, the calibration operation mode of the ending reflecting plate may be closed, and the non-calibration mode may be switched.

Or, in the calibration mode, the reflection angle information and/or the codebook of the plurality of angle information of the signal reflecting plate can be dynamically updated according to the channel environment change, i.e. the first reflection coefficient and the second reflection coefficient can be dynamically updated according to the channel environment change.

According to the calibration signal transmission method, the calibration configuration information is sent to the signal reflecting plate, the calibration configuration information comprises the first angle configuration information for reflecting the first calibration signal sent to the second base station by the first base station by the signal reflecting plate and the second angle configuration information for reflecting the second calibration signal sent to the first base station by the second base station, so that channel calibration can be carried out based on the signal reflecting plate according to system requirements by the calibration configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

Fig. 2 is a schematic flow chart of a calibration signal transmission method according to an embodiment of the invention. The method is performed by a first base station. Wherein the method comprises the following steps:

step 201, under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a first reflection coefficient according to the first angle configuration information, a first calibration signal is sent to a second base station;

optionally, the first angle configuration information includes: the signal reflection plate reflects a reflection angle value or a codebook of a plurality of angle information of a first calibration signal transmitted from the first base station to the second base station.

That is, the first reflection coefficient may be determined by a reflection angle value at which the first calibration signal transmitted from the first base station to the second base station is reflected by the signal reflection plate, or may be determined by a plurality of angle information in the above-mentioned codebook, wherein the first reflection coefficient forms a scanning beam by being sequentially configured as a plurality of angle information in the codebook.

Here, after the first calibration signal is sent to the second base station, for the scanned beam, the second base station needs to select the beam with the strongest signal energy to receive the first calibration signal.

Step 202, receiving a second calibration signal sent by a second base station under the condition that the signal reflecting plate adjusts its own reflection coefficient to a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by the third base station.

The third base station may be the control base station of the signal reflection plate, and may be the first base station, the second base station, or a base station other than the first base station and the second base station.

Optionally, the second angle configuration information includes: the signal reflecting plate reflects a reflection angle value or a codebook of a plurality of angle information of a first calibration signal transmitted from the second base station to the first base station.

That is, the second reflection coefficient may be determined by a reflection angle value by which the second calibration signal transmitted from the first base station to the second base station is reflected by the signal reflection plate, or may be determined by a plurality of angle information in the above-described codebook, wherein the second reflection coefficient forms the scanning beam by being sequentially configured as the plurality of angle information in the codebook.

Likewise, for a scanned beam, the first base station needs to select the beam with the strongest signal energy for receiving the second calibration signal.

As can be seen from the above, the calibration of the radio frequency link channel of the base station by using the signal reflection plate includes two times of transmitting and receiving the calibration signal, wherein the first base station transmits the first calibration signal to the second base station at one time, and the second base station receives the first calibration signal; the second base station sends a second calibration signal to the first base station, and the first base station receives the second calibration signal; the reflection coefficient of the signal reflecting plate is adjusted twice, wherein the reflection coefficient is adjusted to be a first reflection coefficient according to the first angle configuration information, and the reflection coefficient is adjusted to be a second reflection coefficient according to the second angle configuration information.

According to the calibration signal transmission method, under the condition that the signal reflection plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information, a first calibration signal is sent to the second base station; receiving a second calibration signal sent by a second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured by the third base station for the signal reflecting plate, so that the signal reflecting plate is utilized to adjust the self-reflection coefficient according to the angle configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

In an alternative implementation, the sending of the first calibration signal to the second base station in step 201 includes:

in step 2011, the first calibration signal is sent to the second base station via the forwarding of the signal reflection board in the first time window, where the first time window is a time window when the first base station sends the first calibration signal to the second base station.

In the first time window, the signal reflecting plate obtains a first reflection coefficient according to the first angle configuration information, adjusts the amplitude and the phase of each unit on the signal reflecting plate according to the first reflection coefficient, and then transmits a first calibration signal to the second base station through the forwarding of the signal reflecting plate. Thus, the first calibration signal transmitted by the first base station reaches the second base station after being reflected by the signal reflecting plate, and the second base station receives the first calibration signal.

As an alternative implementation, receiving the second calibration signal sent by the second base station in step 202 includes:

in step 2021, the second calibration signal sent by the second base station is received through forwarding of the signal reflection board in a second time window, where the second time window is a time window when the second base station sends the second calibration signal to the first base station.

In the second time window, the signal reflecting plate obtains a second reflection coefficient according to the second angle configuration information, adjusts the amplitude and the phase of each unit on the signal reflecting plate according to the second reflection coefficient, and then transmits a second calibration signal to the first base station through the forwarding of the signal reflecting plate. In this way, the second calibration signal transmitted by the second base station reaches the first base station by reflection of the signal reflection plate, and the second calibration signal is received by the first base station.

a) Under the condition that the first base station is a reference base station, acquiring a first reflection coefficient and a second reflection coefficient;

here, the step a) may specifically include:

a-1) sending a calibration assistance request to a third base station, wherein the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station sends a first calibration signal to the second base station, and the second time window is a time window when the second base station sends a second calibration signal to the first base station;

a-2) receiving calibration assistance request confirmation, a first reflection coefficient and a second reflection coefficient, wherein the calibration assistance request confirmation, the first reflection coefficient and the second reflection coefficient are sent by a third base station, the first reflection coefficient is a reflection coefficient obtained by adjusting a signal reflection plate according to first angle configuration information in a first time window, the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to second angle configuration information in a second time window, and the first reflection coefficient and the second reflection coefficient are determined by the third base station according to the acquired first angle configuration information and second angle configuration information.

Here, the implementation manner of the third base station to obtain the first angle configuration information and the second angle configuration information is detailed in the method part shown in fig. 1, which is not described herein again.

b) Determining a calibration coefficient for the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so that the second base station calibrates a transmitting channel of the second base station according to the calibration coefficient;

here, the first base station is a reference base station, and the second base station is a base station to be calibrated. The first base station calculates a calibration coefficient of the corresponding second base station based on the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so as to instruct the second base station to calibrate a transmitting channel of the second base station according to the calibration coefficient.

Or c) sending the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to the server, so that the server determines the calibration coefficient for the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, and the second base station calibrates the transmitting channel of the second base station according to the calibration coefficient.

Specifically, the channel calibration can be completed by multiplying the calibration coefficient by the transmission channel of the second base station.

The corresponding mode of step b) is that the first base station calculates the calibration coefficient aiming at the second base station, the corresponding mode of step c) is that the first base station transmits the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to a server (such as a calculation center), and the server calculates the calibration coefficient aiming at the second base station, so that the workload of the first base station can be reduced.

Fig. 3 is a schematic flow chart of a calibration signal transmission method according to an embodiment of the present invention. The method is performed by a second base station. Wherein the method comprises the following steps:

step 301, receiving a first calibration signal sent by a first base station when the signal reflection board adjusts its own reflection coefficient to be a first reflection coefficient according to the first angle configuration information.

For the scanned beam, the second base station needs to select the beam with the strongest signal energy to receive the first calibration signal.

Step 302, under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information, a second calibration signal is sent to the first base station; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by the third base station.

Here, after the second calibration signal is sent to the first base station, for the scanned beam, the first base station needs to select the beam with the strongest signal energy to receive the second calibration signal.

According to the calibration signal transmission method, under the condition that the signal reflection plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information, a first calibration signal sent by the first base station is received; under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information, a second calibration signal is sent to the first base station; the first angle configuration information and the second angle configuration information are configured by the third base station for the signal reflecting plate, so that the signal reflecting plate is utilized to adjust the self-reflection coefficient according to the angle configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

In an alternative implementation, receiving a first calibration signal sent by a first base station in step 301 includes:

step 3011, receiving, through forwarding of the signal reflection board, a first calibration signal sent by the first base station in a first time window, where the first time window is a time window in which the first base station sends the first calibration signal to the second base station.

As an alternative implementation, the sending of the second calibration signal to the first base station in step 302 includes:

in step 3021, the second calibration signal is sent to the first base station via forwarding of the signal reflection board in a second time window, where the second time window is a time window when the second base station sends the second calibration signal to the first base station.

a) Under the condition that the second base station is a reference base station, acquiring a first reflection coefficient and a second reflection coefficient;

here, the step a) may specifically include:

a-2) receiving calibration assistance request confirmation, a first reflection coefficient and a second reflection coefficient sent by a third base station, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting a signal reflection plate according to first angle configuration information in a first time window, the second reflection coefficient is a reflection coefficient obtained by adjusting a signal reflection plate according to second angle configuration information in a second time window, and the first reflection coefficient and the second reflection coefficient are determined by the third base station according to the obtained first angle configuration information and second angle configuration information.

B) Determining a calibration coefficient for the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so that the first base station calibrates a transmitting channel of the first base station according to the calibration coefficient;

here, the second base station is a reference base station, and the first base station is a base station to be calibrated. The second base station calculates a calibration coefficient of the corresponding first base station based on the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, so as to instruct the first base station to calibrate a transmitting channel of the first base station according to the calibration coefficient.

Or, C) sending the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to the server, so that the server determines the calibration coefficient for the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, and the first base station calibrates the transmitting channel of the first base station according to the calibration coefficient.

Specifically, the channel calibration can be completed by multiplying the calibration coefficient by the transmission channel of the first base station.

The step B) corresponds to the second base station calculating the calibration coefficient for the first base station, and the step C) corresponds to the second base station transmitting the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to a server (e.g. a calculation center), and the server calculating the calibration coefficient for the first base station, so that the workload of the second base station can be reduced.

Example 1

The kth signal reflecting plate is controlled by the third base station, assuming that the first base station and the second base station are calibrated by a single antenna. y is _k,21 Is reflected by the kth signal reflecting plate, and a calibration signal (assuming self calibration is completed between antennas in the base station) is sent to a certain reference antenna of the second base station by a certain reference transmitting antenna of the first base station, h _k1 Is the link loss between the first base station and the kth signal reflecting plate, h _k2 Is the link loss between the second base station and the kth signal reflecting plate, h _k1 And h _k2 The reciprocal of the uplink and the downlink is satisfied. The calibration procedure is as follows:

(1) The signal reflecting plate is connected to a network and is initially configured into a non-calibration mode;

(2) The first base station sends a calibration assistance request to the third base station, the calibration assistance request comprising a first time window W ₁ And a second time window W ₂ First time window W ₁ A time window for the first base station to transmit a first calibration signal to the second base station, a second time window W ₂ A time window for the second base station to transmit the second calibration signal to the first base station.

(3) A third base station receives the calibration assistance request and synchronizes a time window for transmitting calibration signals with the first base station;

(4) The third base station obtains calibration configuration information according to the first geographic position information of the first base station, the second geographic position information of the second base station and the position information of the signal reflecting plate through prior information, wherein the calibration configuration information comprises a first angle configuration Information and second angle configuration information; and determining a first reflection coefficient Γ based on the first angular configuration information ₁ Determining a second reflection coefficient Γ based on the second angular configuration information ₂ 。

In this embodiment, the first angle configuration information is explicit reflection angle information θ _r ＝30°。

(5) The third base station sends a calibration assistance request acknowledgement to the first base station, the first reflection coefficient Γ ₁ And a second reflection coefficient Γ ₂ 。

(6) The third base station transmits calibration configuration information to the signal reflection plate.

(7) The signal reflecting plate performs a first reflection coefficient Γ according to reflection angle information in the first angle configuration information ₁ And (5) configuration.

(8) The first base station transmits a first calibration signal to the signal reflecting plate.

Assuming that the calibration signal is in all 1 sequences, the received signal of the kth signal reflecting plate is: y is _k1 ＝Γ ₁ h _k1 t ₁

Wherein t is ₁ Is the transmit channel coefficient of the first base station.

(9) The signal reflecting plate forwards the first calibration signal to the second base station.

The calibration signal received by the second base station is: y is _k,21 ＝r ₂ h _2k y _k1 ＝r ₂ h _2k Γ ₁ h _k1 t ₁

Wherein r is ₂ Is the receive channel coefficient of the second base station.

(10) The second base station transmits a second calibration signal to the signal reflecting plate.

Assuming that the calibration signal is in all 1 sequences, the received signal of the kth signal reflecting plate is: y is _k2 ＝Γ ₂ h _k2 t ₂

Wherein t is ₂ Is the transmit channel coefficient of the second base station.

(11) The signal reflecting plate forwards the second calibration signal to the first base station.

The calibration signal received by the first base station is y _k,12 ＝r ₁ h _1k y _k2 ＝r ₁ h _1k Γ ₂ h _k2 t ₂

Wherein r is ₁ Is the reception channel coefficient of the first base station.

(12) Calibration coefficient calculation

The first base station is used as a reference base station to calculate the calibration coefficient of the second base stationThe calculation method includes, but is not limited to, a ratio calculation method: />

I.e.

I.e. multiplying the calibration factor on the transmitting radio frequency channel of the second base stationAnd (3) obtaining the product.

It should be noted that, after calibration is completed, the third base station may control the signal reflection plate to switch from the calibration mode to the non-calibration mode.

The foregoing embodiment of the base transceiver station using a single antenna is one of the embodiments, and the patent scheme is equally applicable to the case of multiple antennas.

As shown in fig. 4, an embodiment of the present invention further provides a calibration signal transmission device, which may include:

the first transmitting module 401 is configured to transmit calibration configuration information to the signal reflecting board, where the calibration configuration information includes first angle configuration information that the signal reflecting board reflects a first calibration signal transmitted from the first base station to the second base station, and second angle configuration information that the signal reflecting board reflects a second calibration signal transmitted from the second base station to the first base station.

Optionally, the calibration signal transmission device of the embodiment of the present invention may further include:

the first acquisition module is used for acquiring first geographic position information of the first base station, second geographic position information of the second base station and position information of the signal reflecting plate;

the first processing module is used for obtaining calibration configuration information according to the first geographic position information, the second geographic position information and the position information of the signal reflecting plate.

Optionally, the first angle configuration information includes a reflection angle value or a codebook of a plurality of angle information, where the reflection angle value or the codebook reflects a first calibration signal sent by the first base station to the second base station by the signal reflection board;

the third receiving module is used for receiving a calibration assistance request sent by a reference base station, wherein the reference base station is a first base station or a second base station, the calibration assistance request comprises a first time window and a second time window, the first time window is a time window for the first base station to send a first calibration signal to the second base station, and the second time window is a time window for the second base station to send a second calibration signal to the first base station;

The synchronization module is used for synchronizing the first time window and the second time window;

the second acquisition module is used for acquiring a first reflection coefficient and a second reflection coefficient, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to first angle configuration information in a first time window, and the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to second angle configuration information in a second time window;

and the fourth sending module is used for sending the calibration assistance request confirmation, the first reflection coefficient and the second reflection coefficient to the reference base station.

According to the calibration signal transmission device, the calibration configuration information is sent to the signal reflection plate, the calibration configuration information comprises the first angle configuration information for reflecting the first calibration signal sent to the second base station by the first base station by the signal reflection plate and the second angle configuration information for reflecting the second calibration signal sent to the first base station by the second base station, so that channel calibration can be carried out based on the signal reflection plate according to system requirements by the calibration configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

As shown in fig. 5, an embodiment of the present invention further provides a calibration signal transmission device, which may include:

the second transmitting module 501 is configured to transmit a first calibration signal to the second base station when the signal reflecting plate adjusts its own reflection coefficient to be the first reflection coefficient according to the first angle configuration information;

the first receiving module 502 is configured to receive a second calibration signal sent by the second base station when the signal reflection board adjusts its own reflection coefficient to be a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured by the third substrate for the signal reflecting plate.

Optionally, the second transmitting module 501 may include:

the first transmitting unit is configured to transmit, in a first time window, a first calibration signal to the second base station via forwarding of the signal reflection board, where the first time window is a time window in which the first base station transmits the first calibration signal to the second base station.

Alternatively, the first receiving module 502 may include:

the first receiving unit is configured to receive, in a second time window, a second calibration signal sent by the second base station via forwarding of the signal reflection board, where the second time window is a time window in which the second base station sends the second calibration signal to the first base station.

the third acquisition module is used for acquiring the first reflection coefficient and the second reflection coefficient under the condition that the first base station is a reference base station;

the second processing module is used for determining a calibration coefficient aiming at the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient so that the second base station calibrates a transmitting channel of the second base station according to the calibration coefficient; or,

and the fifth transmitting module is used for transmitting the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to the server so that the server can determine the calibration coefficient aiming at the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, and the second base station can calibrate the transmitting channel of the second base station according to the calibration coefficient.

Optionally, the third acquisition module may include:

the second sending unit is used for sending a calibration assistance request to the third base station, wherein the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station sends a first calibration signal to the second base station, and the second time window is a time window when the second base station sends a second calibration signal to the first base station;

The second receiving unit is used for receiving calibration assistance request confirmation, a first reflection coefficient and a second reflection coefficient, wherein the calibration assistance request confirmation, the first reflection coefficient and the second reflection coefficient are sent by the third base station, the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflecting plate according to first angle configuration information in a first time window, the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflecting plate according to second angle configuration information in a second time window, and the first reflection coefficient and the second reflection coefficient are determined by the third base station according to the obtained first angle configuration information and second angle configuration information.

According to the calibration signal transmission device, under the condition that the signal reflection plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information, a first calibration signal is sent to the second base station; receiving a second calibration signal sent by a second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured by the third base station for the signal reflecting plate, so that the signal reflecting plate is utilized to adjust the self-reflection coefficient according to the angle configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

As shown in fig. 6, an embodiment of the present invention further provides a calibration signal transmission device, which may include:

the second receiving module 601 is configured to receive a first calibration signal sent by the first base station when the signal reflecting plate adjusts its own reflection coefficient to be a first reflection coefficient according to the first angle configuration information;

the third transmitting module 602 is configured to transmit a second calibration signal to the first base station when the signal reflecting plate adjusts its own reflection coefficient to a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by the third base station.

Optionally, the second receiving module 601 includes:

and the third receiving unit is used for receiving the first calibration signal sent by the first base station through the forwarding of the signal reflecting plate in a first time window, wherein the first time window is a time window when the first base station sends the first calibration signal to the second base station.

Optionally, the third sending module 602 includes:

and the third sending unit is used for sending the second calibration signal to the first base station through the forwarding of the signal reflecting plate in a second time window, wherein the second time window is a time window when the second base station sends the second calibration signal to the first base station.

a fourth obtaining module, configured to obtain a first reflection coefficient and a second reflection coefficient when the second base station is a reference base station;

the third processing module is used for determining a calibration coefficient aiming at the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient so that the first base station calibrates a transmitting channel of the first base station according to the calibration coefficient; or,

and the sixth sending module is used for sending the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient to the server so that the server can determine the calibration coefficient aiming at the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient and the second reflection coefficient, and the first base station can calibrate the transmitting channel of the first base station according to the calibration coefficient.

Optionally, the fourth acquisition module may include:

a fourth transmitting unit, configured to transmit a calibration assistance request to a third base station, where the calibration assistance request includes a first time window and a second time window, the first time window is a time window in which the first base station transmits a first calibration signal to the second base station, and the second time window is a time window in which the second base station transmits a second calibration signal to the first base station;

The fourth receiving unit is configured to receive a calibration assistance request acknowledgement, a first reflection coefficient and a second reflection coefficient, where the calibration assistance request acknowledgement, the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection board according to the first angle configuration information in the first time window, the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection board according to the second angle configuration information in the second time window, and the first reflection coefficient and the second reflection coefficient are determined by the third base station according to the obtained first angle configuration information and the second angle configuration information.

According to the calibration signal transmission device, under the condition that the signal reflection plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information, a first calibration signal sent by the first base station is received; under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information, a second calibration signal is sent to the first base station; the first angle configuration information and the second angle configuration information are configured by the third base station for the signal reflecting plate, so that the signal reflecting plate is utilized to adjust the self-reflection coefficient according to the angle configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

The embodiment of the present invention further provides a calibration signal transmission system, referring to fig. 7, including: the system comprises a first base station, a second base station, a third base station and a signal reflecting plate, wherein the third base station is a control base station of the signal reflecting plate, and the first base station executes a calibration signal transmission method shown in figure 1; the second base station performs a calibration signal transmission method as shown in fig. 2; the third base station performs the calibration signal transmission method as shown in fig. 3.

As shown in fig. 7, taking reconfigurable intelligent surface/intelligent reflection surface (RIS/IRS) as an example, an application scenario schematic of a signal reflection board is provided. The base station radio frequency link channel calibration by using the signal reflecting plate comprises the transmission and the reception of calibration signals twice and the reflection coefficient adjustment of the signal reflecting plate, so that the receiving and transmitting end channel calibration can be performed in an environment where the direct path is difficult to reach, and the overall performance of the mobile communication system is improved.

In order to better achieve the above object, as shown in fig. 8, an embodiment of the present invention further provides a base station, which is a third base station, including a processor 800 and a transceiver 810, where the transceiver 810 is configured to perform the following procedures:

Optionally, the processor 800 is further configured to:

acquiring first geographic position information of a first base station, second geographic position information of a second base station and position information of a signal reflecting plate;

and obtaining calibration configuration information according to the first geographical position information, the second geographical position information and the position information of the signal reflecting plate.

Optionally, the transceiver 810 is further configured to:

receiving a calibration assistance request sent by a reference base station, wherein the reference base station is a first base station or a second base station, the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station sends a first calibration signal to the second base station, and the second time window is a time window when the second base station sends a second calibration signal to the first base station;

the processor 800 is also configured to:

Synchronizing the first time window and the second time window;

obtaining a first reflection coefficient and a second reflection coefficient, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate in a first time window according to first angle configuration information, and the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate in a second time window according to second angle configuration information;

transceiver 810 is also configured to:

the calibration assistance request acknowledgement, the first reflection coefficient, and the second reflection coefficient are transmitted to the reference base station.

According to the base station disclosed by the embodiment of the invention, the calibration configuration information is sent to the signal reflecting plate, and comprises the first angle configuration information for reflecting the first calibration signal sent to the second base station by the first base station by the signal reflecting plate and the second angle configuration information for reflecting the second calibration signal sent to the first base station by the second base station, so that the channel calibration can be carried out based on the signal reflecting plate according to the system requirement by the calibration configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of the air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

In order to better achieve the above object, as shown in fig. 9, an embodiment of the present invention further provides a base station, which is a first base station, including a processor 900 and a transceiver 910, where the transceiver 910 is configured to perform the following procedures:

receiving a second calibration signal sent by a second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by the third base station.

Optionally, the transceiver 910 is further configured to:

and transmitting the first calibration signal to the second base station through forwarding of the signal reflecting plate in a first time window, wherein the first time window is a time window when the first base station transmits the first calibration signal to the second base station.

Optionally, the transceiver 910 is further configured to:

Optionally, the processor 900 is configured to:

under the condition that the first base station is a reference base station, acquiring a first reflection coefficient and a second reflection coefficient;

the first calibration signal, the second calibration signal, the first reflection coefficient, and the second reflection coefficient are transmitted to the server through the transceiver 910, so that the server determines the calibration coefficient for the second base station according to the first calibration signal, the second calibration signal, the first reflection coefficient, and the second reflection coefficient, so that the second base station calibrates the transmission channel of the second base station according to the calibration coefficient.

Optionally, the transceiver 910 is configured to:

transmitting a calibration assistance request to a third base station, wherein the calibration assistance request comprises a first time window and a second time window, the first time window is a time window when the first base station transmits a first calibration signal to the second base station, and the second time window is a time window when the second base station transmits a second calibration signal to the first base station;

and receiving calibration assistance request confirmation, a first reflection coefficient and a second reflection coefficient which are sent by the third base station, wherein the first reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to first angle configuration information in a first time window, the second reflection coefficient is a reflection coefficient obtained by adjusting the signal reflection plate according to second angle configuration information in a second time window, and the first reflection coefficient and the second reflection coefficient are determined by the third base station according to the obtained first angle configuration information and second angle configuration information.

According to the base station provided by the embodiment of the invention, under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information, a first calibration signal is sent to the second base station; receiving a second calibration signal sent by a second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information; the first angle configuration information and the second angle configuration information are configured by the third base station for the signal reflecting plate, so that the signal reflecting plate is utilized to adjust the self-reflection coefficient according to the angle configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

In order to better achieve the above object, as shown in fig. 10, an embodiment of the present invention further provides a base station, which is a first base station, including a processor 1000 and a transceiver 1010, where the transceiver 1010 is configured to perform the following procedures:

under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information, a second calibration signal is sent to the first base station; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by the third base station.

Optionally, the transceiver 1010 is further configured to:

and in the first time window, the first calibration signal sent by the first base station is received through the forwarding of the signal reflecting plate, and the first time window is a time window when the first base station sends the first calibration signal to the second base station.

Optionally, the transceiver 1010 is further configured to:

and transmitting the second calibration signal to the first base station through the forwarding of the signal reflecting plate in a second time window, wherein the second time window is a time window when the second base station transmits the second calibration signal to the first base station.

Optionally, the processor 1000 is further configured to:

under the condition that the second base station is a reference base station, acquiring a first reflection coefficient and a second reflection coefficient;

the first calibration signal, the second calibration signal, the first reflection coefficient, and the second reflection coefficient are transmitted to the server through the transceiver 1010, so that the server determines the calibration coefficient for the first base station according to the first calibration signal, the second calibration signal, the first reflection coefficient, and the second reflection coefficient, so that the first base station calibrates the transmission channel of the first base station according to the calibration coefficient.

Optionally, the transceiver 1010 is further configured to:

According to the base station, under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be the first reflection coefficient according to the first angle configuration information, a first calibration signal sent by the first base station is received; under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to the second angle configuration information, a second calibration signal is sent to the first base station; the first angle configuration information and the second angle configuration information are configured by the third base station for the signal reflecting plate, so that the signal reflecting plate is utilized to adjust the self-reflection coefficient according to the angle configuration information, the calibration process between the first base station and the second base station can be completed under the non-direct path, the accuracy of air interface calibration can be effectively improved, and the overall performance of the distributed ultra-large-scale antenna system is improved.

The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes each process in the calibration signal transmission method embodiment as described above when executing the program, and can achieve the same technical effect, and the repetition is avoided, and the description is omitted here.

The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements each process in the embodiment of the calibration signal transmission method described above, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, magnetic disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.

These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A calibration signal transmission method performed by a third base station, comprising:

2. The method according to claim 1, wherein the method further comprises:

3. The method of claim 1, wherein the first angle configuration information includes a reflection angle value or a codebook of a plurality of angle information by which the signal reflection board reflects a first calibration signal transmitted from a first base station to a second base station;

4. The method according to claim 1, wherein the method further comprises:

Synchronizing the first time window and the second time window;

5. A calibration signal transmission method performed by a first base station, comprising:

6. The method of claim 5, wherein the transmitting the first calibration signal to the second base station comprises:

7. The method of claim 5, wherein receiving the second calibration signal transmitted by the second base station comprises:

8. The method of claim 5, wherein the method further comprises:

9. The method of claim 8, wherein the obtaining the first and second reflection coefficients comprises:

10. The method of claim 5, wherein the first angle configuration information comprises a reflection angle value or a codebook of a plurality of angle information, at which the signal reflection plate reflects a first calibration signal transmitted from a first base station to a second base station;

11. A calibration signal transmission method performed by a second base station, comprising:

12. The method of claim 11, wherein receiving the first calibration signal transmitted by the first base station comprises:

13. The method of claim 11, wherein the transmitting the second calibration signal to the first base station comprises:

14. The method of claim 11, wherein the method further comprises:

15. The method of claim 14, wherein the obtaining the first and second reflection coefficients comprises:

16. The method of claim 11, wherein the first angle configuration information includes a reflection angle value or a codebook of a plurality of angle information by which the signal reflection board reflects a first calibration signal transmitted from a first base station to a second base station;

17. A calibration signal transmission device, comprising:

18. A calibration signal transmission device, comprising:

The first receiving module is used for receiving a second calibration signal sent by the second base station under the condition that the signal reflecting plate adjusts the self-reflection coefficient to be a second reflection coefficient according to second angle configuration information; the first angle configuration information and the second angle configuration information are configured for the signal reflecting plate by a third substrate.

19. A calibration signal transmission device, comprising:

20. A calibration signal transmission system, comprising: a first base station, a second base station, a third base station and a signal reflection plate, the third base station being a control base station of the signal reflection plate, wherein the first base station performs the calibration signal transmission method according to any one of claims 1 to 4; the second base station performing the calibration signal transmission method according to any one of claims 5 to 10; the third base station performs the calibration signal transmission method according to any one of claims 11 to 16.

21. A base station, the base station being a third base station, comprising a processor and a transceiver, the transceiver receiving and transmitting data under control of the processor, the transceiver being configured to:

22. A base station, the base station being a first base station, comprising a processor and a transceiver, the transceiver receiving and transmitting data under control of the processor, the transceiver being configured to:

23. A base station, the base station being a second base station, comprising a processor and a transceiver, the transceiver receiving and transmitting data under control of the processor, the transceiver being configured to:

24. A base station comprising a memory, a processor and a program stored on the memory and executable on the processor; -wherein the processor, when executing the program, implements a calibration signal transmission method according to any one of claims 1 to 4; or performing the calibration signal transmission method of any one of claims 5 to 10; or performing the calibration signal transmission method of any one of claims 11 to 16.

25. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the calibration signal transmission method according to any one of claims 1 to 4, or the steps of the calibration signal transmission method according to any one of claims 5 to 10, or the steps of the calibration signal transmission method according to any one of claims 11 to 16.