Signal sending method, storage medium and electronic device

Abstract

The embodiment of the invention provides a signal sending method, a storage medium and an electronic device, and the method comprises the steps: carrying out the air interface channel calibration of a plurality of TRPs through a base station, so as to align the downlink sending phases of the plurality of TRPs; and the base station sends the signal to the terminal through coherent joint sending of the plurality of TRPs subjected to air interface channel calibration. According to the invention, the problems of poor network performance and low user service rate caused by same-frequency interference in related technologies are solved, and the effects of improving the network performance of signal transmission and improving the user service rate are achieved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of communications, and more particularly, to a signal transmission method, a storage medium, and an electronic device. Background Art

[0002] With the continuous evolution of mobile communication networks, network cells show a trend of decreasing coverage radius and dense site deployment, resulting in an increasingly prominent problem of co-channel interference. The performance of users in the overlapping coverage area of co-channel cells is greatly degraded due to the co-channel interference from neighboring cells, seriously affecting the user service experience. How to meet the increasingly high service requirements of users in the scenario of increasingly dense network overlapping coverage areas has become a major issue that urgently needs to be focused on and broken through in the current communication network. Currently, the closest technologies mainly include cell merging, coordinated multi-point (CoMP) cooperation, etc., but they all have problems of poor network performance and low user service rate. Summary of the Invention

[0003] Embodiments of the present invention provide a signal transmission method, a storage medium, and an electronic device to at least solve the problems of poor network performance and low user service rate caused by co-channel interference in related technologies.

[0004] According to an embodiment of the present invention, a signal transmission method is provided, including: a base station calibrates an air interface channel for multiple transmit-receive points (TRPs) to align the downlink transmission phases of the multiple TRPs; the base station transmits a signal to a terminal through coherent joint transmission of the multiple TRPs that have completed air interface channel calibration.

[0005] According to another embodiment of the present invention, a computer-readable storage medium is further provided. A computer program is stored in the computer-readable storage medium, and the computer program is configured to execute the steps in any one of the above method embodiments when running.

[0006] According to another embodiment of the present invention, an electronic device is further provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0007] Through the present invention, a signal transmission method is provided. The base station calibrates an air interface channel for multiple TRPs to align the downlink transmission phases of the multiple TRPs; the base station transmits a signal to a terminal through coherent joint transmission of the multiple TRPs that have completed air interface channel calibration. The problems of poor network performance and low user service rate caused by co-channel interference in related technologies are solved, and the effects of improving the network performance of signal transmission and the user service rate are achieved. Description of the Drawings

[0008] Figure 1 It is a hardware structure block diagram of a computer terminal for a signal sending method according to an embodiment of the present invention;

[0009] Figure 2 It is a structure block diagram of a network architecture for a signal sending method according to an embodiment of the present invention;

[0010] Figure 3 It is a structure block diagram of a network architecture for a signal sending method according to an embodiment of the present invention;

[0011] Figure 4 It is a flowchart of a signal sending method according to an embodiment of the present invention;

[0012] Figure 5 It is a flowchart of a signal sending method according to an embodiment of the present invention;

[0013] Figure 6 It is a structure block diagram of a signal sending device according to an embodiment of the scenario of the present invention;

[0014] Figure 7 It is a schematic diagram of the principle of a first air interface channel calibration method according to an embodiment of the scenario of the present invention;

[0015] Figure 8 It is a schematic diagram of the principle of a second air interface channel calibration method according to an embodiment of the scenario of the present invention;

[0016] Figure 9 It is a structure block diagram of an air interface channel calibration device according to an embodiment of the scenario of the present invention;

[0017] Figure 10 It is a schematic diagram of the signal interaction principle of air interface channel calibration according to an embodiment of the scenario of the present invention;

[0018] Figure 11 It is a schematic diagram of the signal sending principle according to an embodiment of the scenario of the present invention. Detailed implementation manners

[0019] In the following, embodiments of the present invention will be described in detail with reference to the accompanying drawings and in combination with embodiments.

[0020] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0021] The cell merger technology combines multiple consecutive co-frequency neighboring cells into one logical large cell. Based on frequency-domain scheduling and joint transmission (JT), it eliminates interference and improves signal strength. However, merging multiple cell resources into one cell resource will weaken the user capacity and cell throughput of the network, and it is limited and cannot support joint transmission based on the sounding reference signal (SRS) beamforming in the uplink channel, resulting in certain performance limitations. Although the subsequent CoMP cooperation technology overcomes the problems of reduced user capacity and cell throughput in cell merger, CoMP coordinated scheduling (CS) and coordinated beamforming (CBF) are based on frequency-domain resource cooperation and beam-domain cooperation to stagger frequency-domain interference and spatial signal interference. The defect of this technology is that it only avoids interference, and the cooperating cells do not jointly transmit signals, resulting in the inability to enhance signals and the underutilization of frequency-domain resources. Although the CoMP JT technology realizes joint signal transmission, due to the differences in the location distribution and hardware consistency of the radio frequency devices for joint transmission, it is easy to cause the signals transmitted jointly in the downlink to not be superimposed in the same direction or even cancelled in the opposite direction, resulting in the bottleneck of insignificant network performance gain.

[0022] The method embodiments provided in the embodiments of the present application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a computer terminal as an example, Figure 1 is a hardware structure block diagram of a computer terminal for a signal transmission method according to an embodiment of the present invention. As Figure 1 shown, the computer terminal may include one or more ( Figure 1 only one is shown in the figure) processors 102 (the processors 102 may include, but are not limited to, processing devices such as a microprocessor MCU or a field-programmable gate array FPGA) and a memory 104 for storing data. Among them, the above computer terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 the structure shown is only schematic and does not limit the structure of the above computer terminal. For example, the computer terminal may further include more or fewer components than Figure 1 shown in the figure, or have a different configuration from Figure 1 shown in the figure.

[0023] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the signal sending method in the embodiments of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the computer terminal through a network. Examples of the above network include but are not limited to the Internet, intranet, local area network, mobile communication network, and combinations thereof.

[0024] The transmission device 106 is used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by a communication provider of a computer terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0025] The embodiments of the present application can run on Figure 2 the shown or Figure 3 of the network architecture, such as Figure 2 or Figure 3 shown, the network architecture includes: multiple (at least two) co-frequency transmission receive points (TRP), terminals. Among them, as Figure 2 shown, multiple TRPs belong to multiple cells, and antenna calibration (AntennaCalibration) is performed between multiple TRPs, and then coherent joint transmission signals are sent to the terminal. The terminal accesses from one TRP and receives coherent downlink signals from multiple cooperative TRPs. As Figure 3 shown, multiple TRPs belong to the same combined cell, and antenna calibration is performed between multiple TRPs, and then signals are jointly sent to the terminal. The terminal accesses from one TRP and receives coherent downlink signals from multiple cooperative TRPs.

[0026] In this embodiment, a signal sending method running on the above computer terminal or network architecture is provided. Figure 4 is a flowchart of the signal sending method according to the embodiments of the present invention. As Figure 4 shown, the process includes the following steps:

[0027] Step S402: The base station calibrates the air interface channels of multiple TRPs to align the downlink transmission phases of the multiple TRPs.

[0028] In the actual implementation process, the above-mentioned multiple TRPs can be located in the same base station or in multiple different base stations.

[0029] Step S404: The base station sends the signal to the terminal through the coherent joint transmission of the multiple TRPs that have completed the air interface channel calibration.

[0030] In an exemplary embodiment, before the base station calibrates the air interface channels of multiple TRPs, it further includes: The base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal.

[0031] In an exemplary embodiment, before the base station calibrates the air interface channels of multiple TRPs, it further includes: The base station configures function parameters according to the multiple TRPs, where the function parameters at least include one of the following: multi-point coherent cooperation function parameters; air interface channel calibration function parameters.

[0032] Figure 5 is a flowchart of the signal transmission method according to an embodiment of the present invention, as Figure 5 shown, the process includes the following steps:

[0033] Step S502: The base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal;

[0034] In an exemplary embodiment, the base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal, including: When the multiple TRPs are located in different serving cells, the base station receives the A3 measurement report from the terminal; The base station determines multiple TRPs for coherent cooperation according to the A3 measurement report and the frequency domain resource conditions of each TRP.

[0035] In an exemplary embodiment, the base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal, and further includes: When the multiple TRPs are located in the same serving cell, the base station receives the uplink channel measurement report from the terminal; The base station determines multiple TRPs for coherent cooperation according to the uplink channel measurement report.

[0036] In the actual implementation process, the terminal performs channel measurement according to the above different situations and sends the measurement report to the base station. The base station selects and confirms multiple TRPs for cooperation according to the measurement report, then performs channel calibration, and performs joint transmission to the terminal.

[0037] Step S504: The base station configures functional parameters based on multiple TRPs. The functional parameters include at least one of the following: multi-point coherent cooperation functional parameters; air interface channel calibration functional parameters.

[0038] In the actual implementation process, the above configuration process can be completed by the base station, or by the upper control system or communication system of the base station. The final configuration result is reflected in the base station.

[0039] Step S506: The base station calibrates the air interface channels of multiple TRPs to align the downlink transmission phases of multiple TRPs.

[0040] In an exemplary embodiment, the base station calibrates the air interface channels of multiple TRPs, including: The base station obtains the channel estimation results of each TRP by mutually transmitting calibration signals through multiple TRPs; The base station determines the calibration compensation value of the TRP to be calibrated according to the channel estimation results, where the multiple TRPs include a reference TRP and a TRP to be calibrated; The base station calibrates the air interface channel of the TRP to be calibrated according to the calibration compensation value.

[0041] In the actual implementation process, for multiple TRPs, such as including TRP0, TRP1, and TRP2, TRP1 and TPR2 can be directly compensated and aligned with TRP0, or TRP1 can be directly compensated and aligned with TRP0, and TRP2 is indirectly compensated and aligned with TRP0 through TRP1.

[0042] In an exemplary embodiment, the base station calibrates the air interface channel of the TRP to be calibrated according to the calibration compensation value, including: The base station obtains the air interface channel calibration signal according to the calibration compensation value; The base station sends the air interface channel calibration signal to the TRP to be calibrated through the Guard Period (GP).

[0043] In the actual implementation process, to ensure that the calibration signal does not affect the normal transceiver of the service signal of the network device, the transceiver time of the calibration signal is placed on the GP symbol of the protection period, that is, the calibration signal is sent and received on the GP symbol, so as to avoid the uplink and downlink symbol signals.

[0044] Step S508: The base station sends the signal to the terminal through the coherent joint transmission of multiple TRPs that have completed the air interface channel calibration.

[0045] In an exemplary embodiment, the base station sends the signal to the terminal through the coherent joint transmission of multiple TRPs that have completed the air interface channel calibration, including: The base station configures the signal parameters of the signal to be sent according to the channel sounding reference signal SRS of multiple TRPs; The base station sends the signal with the configured signal parameters to the terminal through multiple TRPs.

[0046] Through the above steps, a signal transmission method is provided. The base station calibrates the air interface channels of multiple TRPs to align the downlink transmission phases of the multiple TRPs; the base station transmits the signal to the terminal through the coherent joint transmission of the multiple TRPs that have completed the air interface channel calibration. This solves the problems of poor network performance and low user service rate caused by co-frequency interference in the related art, and achieves the effects of improving the network performance of signal transmission and the user service rate.

[0047] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

[0048] In this embodiment, a signal transmission device is further provided. This device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0049] The signal transmission device provided in the embodiment of the present invention can be set in a base station and includes: a measurement module, a parameter module, a calibration module, and a transmission module. Among them, the measurement module is used to determine multiple TRPs for coherent cooperation according to the measurement report of the terminal. The parameter module is used to configure function parameters according to the multiple TRPs, where the function parameters at least include one of the following: multi-point coherent cooperation function parameters; air interface channel calibration function parameters. The calibration module is used to calibrate the air interface channels of the multiple TRPs to align the downlink transmission phases of the multiple TRPs. The transmission module is used to transmit the signal to the terminal through the coherent joint transmission of the multiple TRPs that have completed the air interface channel calibration.

[0050] It should be noted that the above-mentioned each module can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to this: the above-mentioned modules are all located in the same processor; or, the above-mentioned each module is located in different processors in any combination form. In the actual implementation process, the naming methods and function divisions of the above-mentioned each module can be determined according to the actual situation, as long as the signal transmission method of the embodiment of the present invention can be implemented, and details will not be repeated here.

[0051] An embodiment of the present invention also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is configured to execute the steps in any one of the above method embodiments when running.

[0052] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store computer programs.

[0053] An embodiment of the present invention also provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0054] In an exemplary embodiment, the above electronic device may further include a transmission device and an input / output device, where the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0055] Specific examples in this embodiment may refer to the examples described in the above embodiments and exemplary embodiments, and will not be repeated here.

[0056] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device, so that they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order from here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module to implement. In this way, the present invention is not limited to any specific combination of hardware and software.

[0057] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in combination with specific scenario embodiments.

[0058] Scenario Embodiment 1

[0059] In the scenario embodiment of the present invention, a signal sending device is provided. Figure 6 It is a structural block diagram of the signal sending device according to the scenario embodiment of the present invention, as Figure 6As shown in the figure, it includes: a system configuration module, a channel calibration module, and a multi-point collaborative joint transmission module. Among them, the system configuration module: configures the parameters of the multi-point coherent cooperation function and the air interface calibration function, and distributes them to the base station equipment. The channel calibration module: for the base station network equipment with coherent cooperation, completes the calibration of the antenna channels between the base station equipment, and ensures the consistency of the downlink transmission phases between the base station equipment. The multi-point collaborative joint transmission module: measures and judges the cooperative neighboring cells or TRPs for the edge users, makes a decision on the joint transmission of the edge users (terminals) between the cooperative cells or TRPs, and completes the function of multi-point coherent joint transmission of signals to the user terminals.

[0060] In the scenario embodiment of the present invention, the function of the above system configuration module can correspond to the parameter module in the above embodiment, the above channel calibration module can correspond to the calibration module in the above embodiment, and the above multi-point collaborative joint transmission module can correspond to the transmission module in the above embodiment.

[0061] According to the above signal transmission device, in the scenario embodiment of the present invention, a signal transmission method is provided, including the following steps:

[0062] Step S702, configure the network cells or TRP clusters that need to cooperate, and set the function parameters of the air interface channel calibration for the cooperative cells or TRP clusters.

[0063] In the actual implementation process, the above configuration process can be completed by the base station, or by the upper control system or communication system of the base station. The final configuration result is reflected in the base station. Among them, multiple TRPs are the above TRP clusters. Multiple TRPs can be located in the same base station or different base stations. Different base stations can be located in different network cells or the same network cell. The TRPs between multiple different network cells perform cooperative coherent transmission, that is, the above cooperative cells.

[0064] Step S704, execute the channel calibration function between the radio frequency devices of the cooperative cells or TRP clusters, and complete the radio frequency transmission phase compensation and alignment between the radio frequency devices.

[0065] In the actual implementation process, the above calibration process is completed by the base station.

[0066] Step S706, perform cooperative cell or TRP measurement selection on the edge users, judge whether the signal transmission processing process meets the joint transmission conditions, and complete the joint transmission processing of the signals.

[0067] Taking the cooperation between multiple cells as an example, step S706 includes the following steps:

[0068] A1. Edge users (terminals) trigger A3 measurement, select a collaborative cell suitable for cooperation based on the A3 measurement results and frequency-domain resource conditions, and perform SRS measurement on the serving cell TRP and the collaborative cell TRP for the judgment of cooperative scheduling.

[0069] In the actual implementation process, the step order of performing SRS measurement on the serving cell TRP and the collaborative cell TRP can be before the air interface channel calibration or before the joint transmission signal, because the SRS measurement results are used for cooperative scheduling, and cooperative scheduling occurs during the process where the base station coherently combines multiple TRPs that have completed the air interface channel calibration and transmits the signal to the terminal.

[0070] In the actual implementation process, the SRS measurement is completed, and the results are used for the next specific judgment of cooperative scheduling. For example, the SRS measurement will obtain the power values of the terminal in the serving cell and the collaborative neighboring cell. Only when the power value difference meets the threshold condition can cooperative scheduling be performed.

[0071] In the actual implementation process, a collaborative cell suitable for cooperation is selected based on the A3 measurement results and frequency-domain resource conditions. The specific selection condition judgment is to set a preset signal value threshold or frequency-domain resource threshold according to the actual situation, etc. For example, when the difference between the signal value measured by the terminal in the accessed cell and the signal value in a certain neighboring cell is within a certain threshold value, and the remaining frequency-domain resources of the neighboring cell also meet a certain threshold condition, it is considered that the neighboring cell can cooperate. There is no specific limitation here.

[0072] A2. Edge users determine whether downlink services can be jointly transmitted cooperatively based on the power difference and delay difference between collaborative TRPs.

[0073] In the actual implementation process, for the above determination of whether downlink services can be jointly transmitted cooperatively based on the power difference and delay difference between collaborative TRPs, a power threshold or a delay difference threshold can be set according to the actual situation. When the threshold is met, it is further determined that the downlink services can be jointly transmitted cooperatively. Among them, the setting of the threshold is determined according to the actual situation, and there is no specific limitation here.

[0074] A3. Determine the transmission configuration for edge users with cooperative joint transmission, and jointly transmit the downlink data signal to the air interface according to their respective SRS weights.

[0075] In the actual implementation process, the above determination of the transmission configuration for edge users with cooperative joint transmission and the joint transmission of the downlink data signal to the air interface according to their respective SRS weights are completed by the base station. Among them, the determination of the transmission configuration for edge users with cooperative joint transmission is to configure the signal parameters, etc. of the signal to be transmitted. After the configuration is completed, the transmission is carried out. Among them, the configuration content can include frequency domain, time domain, number of layers, modulation method, etc., and there is no specific limitation here.

[0076] Taking the cooperation among multiple TRPs in the same cell as an example, the specific processing steps include the following steps:

[0077] B1. Based on the uplink channel measurement results among multiple TRPs for edge users, the base station device selects a suitable TRP as the cooperative TRP and completes the processing judgment for user cooperative scheduling.

[0078] B2. Determine the transmission configuration for edge users with cooperative joint transmission, and jointly transmit the downlink data signal to the air interface according to their respective SRS weights.

[0079] In the actual implementation process, in step S606, the terminal performs channel measurement according to the above different situations and sends the measurement report to the base station. The base station selects and confirms multiple cooperative TRPs according to the measurement report, then performs channel calibration, and jointly transmits to the terminal. In the actual implementation process, the execution order of the above step S606 can be adjusted according to the actual situation. In one embodiment, before the joint transmission, the terminal can also perform channel measurement according to different situations to determine whether the downlink service can be cooperatively jointly transmitted.

[0080] Scenario Embodiment Two

[0081] In Scenario Embodiment Two, the detailed implementation process of the steps in Scenario Embodiment One is introduced and described.

[0082] Figure 7 is a schematic diagram of the principle of the first air interface channel calibration method according to the scenario embodiment of the present invention. As Figure 7 shown, the channel calibration between different radio frequency devices, i.e., TRPs, does not depend on the terminal device. By mutually transmitting calibration signals between the antennas of the radio frequency devices, the channel estimation result H is obtained. The interval requirement for mutually transmitting calibration signals is very short to ensure the reciprocity consistency of the air interface channel. The calibration compensation value ΔC between the two TRPs and two antennas is determined from the channel estimation result. Taking the reference device as TRP0 as an example, the non-reference devices TRP1 and TRP2 are compensated and aligned to the reference device according to the calibration topology. As Figure 7 shown, under the topology, TRP1 and TPR2 are directly compensated and aligned with TRP0.

[0083] Figure 8 is a schematic diagram of the principle of the second air interface channel calibration method according to the scenario embodiment of the present invention. As Figure 8 shown, under the topology, TRP1 is directly compensated and aligned with TRP0, and TRP2 is indirectly compensated and aligned with TRP0 through TRP1.

[0084] In the actual implementation process, the compensation value is compensated to the downlink transmitted time-frequency domain data on the TRP1 and TRP2 devices, realizing the alignment of the downlink transmission phases among the TRP0 / TRP1 / TRP2 devices. Among them, in the communication principle of the related technology, the compensation value is compensated to the downlink transmitted time-frequency domain data, and the downlink signal has a signal weight, which is used to adjust the phase, direction angle, etc. of the signal, and finally control the transmission direction and phase of the data carried by the signal.

[0085] To ensure that the calibration signal does not affect the transceiver of the normal service signals of the network device, the transceiver time of the calibration signal is placed on the guard period GP symbol, that is, the calibration signal is transmitted and received on the GP symbol, so as to avoid the uplink and downlink symbol signals.

[0086] Figure 9 It is a structural block diagram of an air interface channel calibration device according to an embodiment of the scenario of the present invention, as Figure 9 shown, the air interface channel calibration device includes: a calibration transmission module, a calibration reception module, and a calibration calculation and compensation module. The calibration transmission module is responsible for generating a calibration signal and completing the air interface transmission of the sequence at a set time sequence; the calibration reception module is responsible for receiving the calibration signal at a set time sequence and decoding and demodulating the calibration signal; the calibration calculation and compensation module calculates the time-frequency domain compensation value between device channels through the decoded measurement signal, that is, the above-mentioned channel estimation signal, and completes the correct compensation of the compensation value on the device channels.

[0087] In the actual implementation process, the above air interface channel calibration device can be set in a base station.

[0088] Figure 10 It is a schematic diagram of the signal interaction principle of air interface channel calibration according to an embodiment of the scenario of the present invention, as Figure 10 shown, the first network (i.e., the first transmission and reception point network or the first TRP) determines the network set (i.e., the TRP set) that needs to cooperate for air interface channel calibration, and sends a synchronous calibration notification control message to each receiving point network. Among them, the synchronous calibration notification control message is a software message between base stations. First, the first network transmits the calibration signal according to the time sequence, the second network synchronously receives the measurement signal and forwards the measurement signal to the first network, then the second network transmits the calibration signal according to the time sequence, the first network receives the measurement signal, and the first network obtains the compensation value between the two networks after converting and calculating the two measurement signals. If the first network is used as the reference, the compensation value is sent to the second network to complete the compensation on the second network. In the actual implementation process, the above description is not limited to between 2 networks and can be extended to the third network or the Nth network.

[0089] According to the above air interface channel calibration device or signal interaction process, in the second embodiment of this scenario, a detailed signal transmission process is provided. Figure 11It is a schematic diagram of the signal transmission principle according to the scenario embodiment of the present invention. As Figure 11 shown, after the terminal accesses the first network, it starts measurement and reports the measurement results to the first transmission and reception point network. The first transmission and reception point network determines the cooperation network (the second transmission and reception point network) of the user according to the measurement results and sends a synchronization message to the second transmission and reception point network. The first transmission and reception point network and the second transmission and reception point network measure the uplink reference signal of the terminal. The second transmission and reception point network sends the demodulated measurement signal to the first transmission and reception point network. The first transmission and reception point network determines whether the condition for downlink joint transmission is met based on the measurement information. If it is met, it sends the synchronization information for joint transmission to the second transmission and reception point network to notify the second transmission and reception point network to jointly transmit the downlink signal. Finally, the first transmission and reception point network and the second transmission and reception point network synchronously send the downlink data signal to the terminal, and the terminal receives the coherently jointly transmitted signal.

[0090] In summary, the embodiment of the present invention provides a signal transmission method, which is mainly applied to the networking scenario of the Time Division Duplexing (TDD) New Radio (NR) and the distributed large-scale networking of the future 6th Generation (6G) network. After the joint calibration of the air interface antennas between two or more co-frequency network devices with the same antenna or different antenna units, the cooperative coherent joint shaping is performed on the downlink edge users based on the SRS beamforming (Beam Forming, abbreviated as BF), so as to achieve the effect of in-phase superposition of the downlink signals received by the terminal. It is possible to use the difference in the downlink service rates of different edges within the same cell of the terminal as the entry point. If the rate perception is significantly improved in the cell overlap area, it is possible to further detect whether there is a periodic signal in the GP symbol to confirm whether the technical solution provided by the embodiment of the present invention is adopted.

[0091] The embodiment of the present invention provides a signal transmission method, which performs coherent joint transmission based on the joint calibration of the air interface antennas, and realizes the joint transmission between the downlink service cells of the terminal through the multi-point cooperation technology, converts the interference signal into a useful signal, and improves the received signal strength. Since the radio frequency transmission points for joint transmission are distributed at different physical locations and there are consistency differences in the cooperative hardware channels, it will cause a phase difference in the signals received by the terminal, which is likely to cause performance degradation. Therefore, the embodiment of the present invention performs joint calibration of the air interface antennas for the cooperative radio frequency channels, reduces the phase difference between the radio frequency channels, ensures that the signals received by the terminal have the effect of in-phase superposition, realizes the purpose of enhancing the signal power, and improves the service rate performance of the user.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A signal sending method, characterized in that, Including: The base station performs air interface channel calibration on multiple transmit receive points (TRPs) to align the downlink transmission phases of the multiple TRPs; The base station sends a signal to a terminal through coherent joint transmission of the multiple TRPs that have completed air interface channel calibration.

2. The method according to claim 1, wherein Before the base station performs air interface channel calibration on multiple transmit receive points (TRPs), the method further includes: The base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal.

3. The method according to claim 2, wherein The base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal, including: When the multiple TRPs are located in different serving cells, the base station receives an A3 measurement report from the terminal; The base station determines multiple TRPs for coherent cooperation according to the A3 measurement report and the frequency domain resource conditions of each TRP.

4. The method according to claim 2, wherein The base station determines multiple TRPs for coherent cooperation according to the measurement report of the terminal, and further includes: When the multiple TRPs are located in the same serving cell, the base station receives an uplink channel measurement report from the terminal; The base station determines multiple TRPs for coherent cooperation according to the uplink channel measurement report.

5. The method according to claim 1, characterized in that The base station performs air interface channel calibration on multiple transmit receive points (TRPs), including: The base station obtains a channel estimation result of each TRP by mutually transmitting calibration signals through the multiple TRPs; The base station determines a calibration compensation value for a TRP to be calibrated according to the channel estimation result, where the multiple TRPs include a reference TRP and the TRP to be calibrated; The base station performs air interface channel calibration on the TRP to be calibrated according to the calibration compensation value.

6. The method according to claim 5, wherein The base station performs air interface channel calibration on the TRP to be calibrated according to the calibration compensation value, including: The base station obtains an air interface channel calibration signal according to the calibration compensation value; The base station sends the air interface channel calibration signal to the TRP to be calibrated through a guard period (GP).

7. The method according to claim 1, wherein The base station sends a signal to a terminal through coherent joint transmission of the multiple TRPs that have completed air interface channel calibration, including: The base station configures signal parameters for the signal to be transmitted according to the channel sounding reference signals (SRSs) of the multiple TRPs; The base station sends the signal with configured signal parameters to the terminal through the multiple TRPs.

8. The method according to claim 1, wherein Before the base station performs air interface channel calibration on multiple transmit receive points (TRPs), the method further includes: The base station performs functional parameter configuration according to the multiple TRPs, where the functional parameters at least include one of the following: multi-point coherent cooperation functional parameters; air interface channel calibration functional parameters.

9. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, where the computer program, when executed by a processor, implements the method described in any one of claims 1 to 8.

10. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method described in any one of claims 1 to 8.

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