A noise floor suppression method, device and computer readable storage medium

Abstract

The application provides a floor noise suppression method, device and computer readable storage medium, the method comprises the following steps: receiving the first notification message sent by the interfered cell, the first notification message is used for notifying the interference source cell that the interfered cell needs to reduce the floor noise through joint power control; according to the measurement report reported by at least one user terminal under the interference source cell, the user terminal in the overlapping coverage area of the interference source cell and the interfered cell is screened out; in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition, the transmission power of the user terminal in the overlapping coverage area is reduced. The method, device and computer readable storage medium can solve the problem that the existing floor noise suppression method does not consider the influence of the transmission power of the user terminal under the interference source cell on the floor noise of the interfered cell in a large traffic scenario, resulting in poor floor noise suppression effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a floor noise suppression method and device and computer readable storage medium. BACKGROUND

[0002] With the development of society, people's spiritual and cultural life is more colorful, various large-scale events, concerts and other activities are frequently held, in the large traffic scenario, based on the characteristics of large closed venues such as stadiums, the single area is large, the space is open, and the user distribution density is high, a large number of users will initiate voice or data services at the same time in a short time, and the transmission power of user terminals in the overlapping coverage area between different cells will quickly raise the floor noise of the interfered cell, which will greatly affect the perception of users in the venue.

[0003] Therefore, in order to effectively guarantee the smoothness of real-time communication services such as WeChat, TikTok, live broadcast platform and various self-media platforms, how to reduce the floor noise of the interfered cell is a problem that needs to be solved at present.

[0004] However, the existing floor noise suppression method does not consider the influence of the transmission power of user terminals under the interference source cell on the floor noise of the interfered cell in the large traffic scenario, resulting in poor floor noise suppression effect. SUMMARY

[0005] The present application solves the technical problems of the prior art, provides a floor noise suppression method, device and computer readable storage medium, which solves the problem that the existing floor noise suppression method does not consider the influence of the transmission power of user terminals under the interference source cell on the floor noise of the interfered cell in the large traffic scenario, resulting in poor floor noise suppression effect.

[0006] In a first aspect, the present application provides a floor noise suppression method applied to an interference source cell, comprising:

[0007] Receiving a first notification message sent by an interfered cell, the first notification message being used to notify the interference source cell that the interfered cell needs to reduce floor noise through joint power control;

[0008] According to the measurement report reported by at least one user terminal under the interference source cell, the user terminals in the overlapping coverage area of the interference source cell and the interfered cell are screened out;

[0009] In response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition, the transmission power of the user terminals in the overlapping coverage area is reduced.

[0010] Further, before the step of screening out the user terminals in the overlapping coverage area of the interfering cell and the interfered cell according to the measurement reports reported by the at least one user terminal under the interfering cell, the method further comprises:

[0011] issuing a measurement configuration to the at least one user terminal under the interfering cell, the measurement configuration being used to instruct the user terminal to measure the interfering cell and the interfered cell;

[0012] receiving the measurement reports reported by the at least one user terminal according to the measurement of the interfering cell and the interfered cell.

[0013] Further, the step of screening out the user terminals in the overlapping coverage area of the interfering cell and the interfered cell according to the measurement reports reported by the at least one user terminal under the interfering cell specifically comprises:

[0014] for each of the at least one user terminal under the interfering cell, if the level values of the interfering cell and the interfered cell in the measurement report reported by the user terminal are within a preset range, the user terminal is regarded as a user terminal in the overlapping coverage area.

[0015] Further, the step of reducing the transmission power of the user terminals in the overlapping coverage area in response to the fact that the spectral efficiency of the interfering cell meets the joint power control condition specifically comprises:

[0016] if the spectral efficiency of the interfering cell is greater than or equal to a preset first spectral efficiency threshold, the transmission power of the user terminals in the overlapping coverage area is reduced by reducing the base station expected receiving power of the interfering cell and / or reducing the power compensation of the user terminals under the interfering cell to path loss;

[0017] if the spectral efficiency of the interfering cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, the transmission power of the user terminals in the overlapping coverage area is reduced by reducing the number of resource blocks (RBs) and / or the modulation and coding order corresponding to the user terminals in the overlapping coverage area, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

[0018] Further, after the step of reducing the transmission power of the user terminals in the overlapping coverage area, the method further comprises:

[0019] sending a first response message corresponding to the first notification message to the interfered cell, so that the interfered cell updates the current noise floor and spectral efficiency of the interfered cell according to the first response message, the first response message being used to indicate that the joint power control is completed.

[0020] In a second aspect, the present application provides a noise floor suppression method applied to a victim cell, comprising:

[0021] sending a first notification message to a source cell to inform the source cell that the victim cell needs to reduce noise floor through joint power control, so that the source cell screens out user terminals in an overlapping coverage area of the source cell and the victim cell according to measurement reports reported by at least one user terminal under the source cell, and reduces transmission power of the user terminals in the overlapping coverage area in response to a spectrum efficiency of the source cell meeting a joint power control condition.

[0022] Further, after the sending of the first notification message to the source cell to inform the source cell that the victim cell needs to reduce noise floor through joint power control, the method further comprises:

[0023] receiving a first response message corresponding to the first notification message sent by the source cell, the first response message being used to indicate completion of joint power control;

[0024] updating current noise floor and spectrum efficiency of the victim cell according to the first response message.

[0025] Further, the joint power control condition comprises any one of the following conditions:

[0026] the spectrum efficiency of the source cell is greater than or equal to a preset first spectrum efficiency threshold;

[0027] the spectrum efficiency of the source cell is less than the first spectrum efficiency threshold and greater than a preset second spectrum efficiency threshold, wherein the first spectrum efficiency threshold is greater than the second spectrum efficiency threshold.

[0028] Further, the sending of the first notification message to the source cell to inform the source cell that the victim cell needs to reduce noise floor through joint power control specifically comprises:

[0029] when it is detected that the spectrum efficiency of the victim cell is less than the second spectrum efficiency threshold and the noise floor of the victim cell is greater than a preset noise floor threshold, sending the first notification message to the source cell to inform the source cell that the victim cell needs to reduce noise floor through joint power control; or,

[0030] When the first indication information sent by the target system is received, a first notification message is sent to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the floor noise through joint power control, wherein the first indication information is sent by the target system when it is detected that the spectral efficiency of the interfered cell is less than the second spectral efficiency threshold and the floor noise of the interfered cell is greater than the floor noise threshold.

[0031] In a third aspect, the present application provides a floor noise suppression device arranged in an interference source cell, comprising:

[0032] A first receiving module is configured to receive a first notification message sent by an interfered cell, wherein the first notification message is used to inform an interference source cell that the interfered cell needs to reduce the floor noise through joint power control;

[0033] A screening module is connected with the first receiving module and is configured to screen out user terminals in an overlapping coverage area between the interference source cell and the interfered cell according to a measurement report reported by at least one user terminal under the interference source cell;

[0034] A reducing module is connected with the screening module and is configured to reduce the transmission power of the user terminals in the overlapping coverage area in response to the spectral efficiency of the interference source cell meeting a joint power control condition.

[0035] In a fourth aspect, the present application provides a floor noise suppression device arranged in an interfered cell, comprising:

[0036] A sending module is configured to send a first notification message to an interference source cell to inform the interference source cell that the interfered cell needs to reduce the floor noise through joint power control, so that the interference source cell screens out user terminals in an overlapping coverage area between the interference source cell and the interfered cell according to a measurement report reported by at least one user terminal under the interference source cell, and reduces the transmission power of the user terminals in the overlapping coverage area in response to the spectral efficiency of the interference source cell meeting a joint power control condition.

[0037] In a fifth aspect, the present application provides a floor noise suppression device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is arranged to run the computer program to realize the floor noise suppression method in the first aspect or the second aspect.

[0038] In a sixth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the floor noise suppression method in the first aspect or the second aspect.

[0039] The application provides a noise floor suppression method, device and computer readable storage medium. First, a first notification message sent by a disturbed cell is received, and the first notification message is used for notifying a source cell that the disturbed cell needs to reduce noise floor through joint power control. Then, a user terminal in an overlapping coverage area of the source cell and the disturbed cell is screened out according to a measurement report reported by at least one user terminal under the source cell. Finally, the transmission power of the user terminal in the overlapping coverage area is reduced in response to the fact that the spectral efficiency of the source cell meets the joint power control condition. The application notifies the source cell of the disturbed cell, and needs to reduce noise floor through joint power control, so that the source cell analyzes the measurement report reported by the user terminal, and adjusts the power of the user terminal in the overlapping coverage area of the source cell and the disturbed cell in combination with the spectral efficiency of the source cell, thereby suppressing the lifting of the noise floor of the disturbed cell, guaranteeing the service demand of the user under the disturbed cell, and solving the problem that the existing noise floor suppression method does not consider the influence of the transmission power of the user terminal under the source cell on the noise floor of the disturbed cell in a large traffic scenario, and the noise floor suppression effect is poor. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 An interference schematic diagram of an existing macro station-macro station networking mode;

[0041] Figure 2 A flowchart of a noise floor suppression method according to Embodiment 1 of the application;

[0042] Figure 3 A scatter plot of the relationship between spectral efficiency and noise floor according to the application;

[0043] Figure 4 A flowchart of another noise floor suppression method according to Embodiment 1 of the application;

[0044] Figure 5 A flowchart of a noise floor suppression method according to Embodiment 2 of the application;

[0045] Figure 6 A structural schematic diagram of a noise floor suppression device according to Embodiment 3 of the application;

[0046] Figure 7 A structural schematic diagram of a noise floor suppression device according to Embodiment 4 of the application;

[0047] Figure 8 A structural schematic diagram of a noise floor suppression device according to Embodiment 5 of the application. DETAILED DESCRIPTION

[0048] In order for those skilled in the art to better understand the technical solutions of the application, the embodiments of the application will be further described in detail below with reference to the drawings.

[0049] It can be understood that the specific embodiments and drawings described herein are only used to explain the present application, but not to limit the present application.

[0050] It can be understood that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0051] It can be understood that, for the convenience of description, only parts related to the present application are shown in the drawings of the present application, and parts unrelated to the present application are not shown in the drawings.

[0052] It can be understood that each unit and module involved in the embodiments of the present application can only correspond to one entity structure, or can be composed of multiple entity structures, or multiple units and modules can be integrated into one entity structure.

[0053] It can be understood that the functions and steps marked in the flowcharts and block diagrams of the present application can occur in an order different from that marked in the drawings without conflict.

[0054] It can be understood that in the flowcharts and block diagrams of the present application, the architecture, functions and operations of possible implementations of the system, device, equipment and method according to the embodiments of the present application are shown. Each block in the flowchart or block diagram can represent a unit, module, program segment, code, which contains executable instructions for realizing the specified functions. Moreover, each block or combination of blocks in the block diagram and flowchart can be realized by a hardware-based system for realizing the specified functions, or by a combination of hardware and computer instructions.

[0055] It can be understood that the units and modules involved in the embodiments of the present application can be realized in the form of software or hardware, for example, the units and modules can be located in a processor.

[0056] SUMMARY

[0057] With the development of society, people's spiritual and cultural life is more colorful, various large-scale events, concerts and other activities are held frequently, in the large traffic scene, especially in the large closed venue where concerts and large-scale events are held, the antenna is usually placed high, the wireless environment is simple and unobstructed, the signal levels of different cells in the venue will not differ too much at the same position, resulting in serious overlapping coverage, and the terminal is relatively close to the base station, and the users are dense, so the influence of the transmission power of a large number of terminals on the noise cannot be ignored.

[0058] For example, Figure 1As shown, taking the macro station-macro station networking mode as an example, the terminal performs services in a serving cell (i.e., an interference source cell) and performs uplink and downlink interactions with the serving cell, but the transmission power of the terminal is an interference to a neighboring cell (i.e., a cell being interfered). This situation is particularly obvious in large and closed venues with concentrated users.

[0059] Specifically, in the special scenario of large traffic in a closed environment, the overlapping coverage between cells is more serious, and the transmission power of the terminal is too large to cause great interference to the neighboring cell, resulting in a significant increase in the noise floor of the neighboring cell. In order to meet the BLER (block error rate) requirement of the service, the user in the neighboring cell needs to increase the transmission power. When the transmission power of the terminal in the neighboring cell reaches the maximum but still cannot meet the current service BLER requirement of the user, the information sent by the terminal cannot be received or parsed by the base station. The terminal also cannot reply to the uplink ACK / NACK sent by the base station, so the base station will continuously resend, resulting in a large reduction in effective data.

[0060] In summary, based on the characteristics of large and closed venues such as stadiums, the single area is large and the space is open, and the user distribution density is very high. A large number of users will simultaneously initiate voice or data services in a short time, and the transmission power of the user terminal in the overlapping coverage area between different cells will rapidly raise the noise floor of the neighboring cell, which will greatly affect the user perception in the venue.

[0061] Therefore, in order to alleviate the influence of the transmission power of the terminal in a large overlapping coverage area on the noise floor of the neighboring cell and effectively guarantee the smoothness of real-time communication services such as WeChat, TikTok, live streaming platforms, and various self-media platforms, how to reduce the cell noise floor, improve the spectrum efficiency, and improve the user perception is a problem that needs to be solved urgently.

[0062] However, the existing noise floor suppression method does not consider the influence of the transmission power of the user terminal under the interference source cell on the noise floor of the cell being interfered, resulting in poor noise floor suppression effect.

[0063] To solve the above technical problems, the application provides a floor noise suppression method, device and computer readable storage medium. The method comprises the following steps: a first notification message is received from a victim cell, wherein the first notification message is used to inform an aggressor cell that the victim cell needs to reduce floor noise by joint power control; and the aggressor cell analyzes a measurement report reported by a user terminal, and adjusts the power of the user terminal in an overlapping coverage area of the aggressor cell and the victim cell in combination with the spectral efficiency of the aggressor cell, so as to suppress the lifting of the floor noise of the victim cell and guarantee the service requirement of the user under the victim cell.

[0064] After introducing the basic principle of the application, the various non-limiting embodiments of the application will be specifically introduced with reference to the accompanying drawings.

[0065] Embodiment 1

[0066] The embodiment provides a floor noise suppression method, which is applied to an aggressor cell, as shown in the figure, and the method comprises the following steps. Figure 2

[0067] Step S101: receiving a first notification message sent by a victim cell, wherein the first notification message is used to inform an aggressor cell that the victim cell needs to reduce floor noise by joint power control.

[0068] Specifically, when the victim cell detects that the spectral efficiency of the victim cell is lower than a set second spectral efficiency threshold and the floor noise of the victim cell is higher than a set floor noise threshold, or when the victim cell receives first indication information sent by a target system when detecting that the spectral efficiency of the victim cell is lower than the second spectral efficiency threshold and the floor noise of the victim cell is higher than the floor noise threshold, the victim cell sends a first notification message to the aggressor cell, wherein the first notification message is used to inform the aggressor cell that the victim cell needs to reduce floor noise by joint power control, and the aggressor cell receives the first notification message sent by the victim cell.

[0069] It should be noted that the target system can be a base station system or a network management system.

[0070] Step S102: screening a user terminal in an overlapping coverage area of the aggressor cell and the victim cell according to a measurement report reported by at least one user terminal under the aggressor cell.

[0071] In an optional embodiment, before the step of screening the user terminal in the overlapping coverage area of the aggressor cell and the victim cell according to the measurement report reported by the at least one user terminal under the aggressor cell, the method further comprises the following steps:

[0072] ​distributing, to at least one user terminal under the interference source cell, a measurement configuration for instructing the user terminal to measure the interference source cell and the interfered cell;

[0073] receiving a measurement report reported by the at least one user terminal after the at least one user terminal measures the interference source cell and the interfered cell according to the measurement configuration.

[0074] Specifically, the interference source cell distributes a measurement configuration to each of the at least one user terminal under the interference source cell, instructing the user terminal to measure the interference source cell and the interfered cell. Each of the at least one user terminal receives the measurement configuration from the interference source cell, measures the interference source cell and the interfered cell according to the measurement configuration, and reports a corresponding measurement report to the interference source cell. The interference source cell receives the measurement report reported by each of the at least one user terminal.

[0075] In an optional embodiment, the filtering out of the user terminal in the overlapping coverage area between the interference source cell and the interfered cell according to the measurement report reported by the at least one user terminal under the interference source cell specifically includes:

[0076] For each of the at least one user terminal under the interference source cell, if the level value of the interference source cell and the level value of the interfered cell in the measurement report reported by the user terminal are within a preset range, the user terminal is determined as the user terminal in the overlapping coverage area.

[0077] Specifically, for each of the at least one user terminal, the interference source cell analyzes the measurement report reported by the user terminal. If the level value of the interference source cell and the level value of the interfered cell measured by the user terminal are within a set range (preferably 6 dB), the user terminal is determined as the user terminal in the overlapping coverage area between the interference source cell and the interfered cell, i.e., the transmission power of the user terminal is too high to have a significant impact on the noise floor of the interfered cell.

[0078] Step S103: in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition, reducing the transmission power of the user terminal in the overlapping coverage area.

[0079] It should be noted that the joint power control condition includes any one of the following conditions: the spectral efficiency of the interference source cell is greater than or equal to a preset first spectral efficiency threshold; the spectral efficiency of the interference source cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

[0080] In an alternative embodiment, the step of reducing the transmission power of the user terminals in the overlapping coverage area in response to the spectral efficiency of the interfering cell satisfying the joint power control condition comprises:

[0081] If the spectral efficiency of the interfering cell is greater than or equal to a preset first spectral efficiency threshold, the transmission power of the user terminals in the overlapping coverage area is reduced by reducing the base station expected received power of the interfering cell and / or reducing the power compensation of the user terminals under the interfering cell for path loss.

[0082] If the spectral efficiency of the interfering cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, the transmission power of the user terminals in the overlapping coverage area is reduced by reducing the number of RBs (Resource Blocks) and / or the modulation and coding order corresponding to the user terminals in the overlapping coverage area, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

[0083] Specifically, the step of reducing the transmission power of the user terminals in the overlapping coverage area can comprise:

[0084] (1) If the spectral efficiency of the interfering cell is high, higher than or equal to a preset first spectral efficiency threshold, indicating that the transmission quality of the interfering cell as a whole is good, the transmission power of the user terminals in the interfering cell can be reduced by reducing the base station expected received power of the interfering cell and / or reducing the power compensation of the user terminals under the interfering cell for path loss, so as to reduce the interference to the user terminals in the interfering cell, thereby reducing the interference to the interfered cell. This method can reduce the transmission power of all user terminals in the interfering cell as a whole, of course, it can also reduce the transmission power of the user terminals in the overlapping coverage area, so as to reduce the impact on the bottom noise lifting of the interfered cell. This method can maintain the original wireless resource allocation and modulation and coding mode under the premise of meeting the block error rate requirement, and has relatively small impact on the spectral efficiency.

[0085] (2) If the spectral efficiency of the interfering cell is lower than the first spectral efficiency threshold and higher than the second spectral efficiency threshold (the first spectral efficiency threshold is greater than the second spectral efficiency threshold), the transmission power of the user terminals in the overlapping coverage area is reduced by the base station of the interfering cell without changing the base station expected received power of the interfering cell and the power compensation of the user terminals under the interfering cell for path loss, so as to reduce the impact on the bottom noise lifting of the interfered cell. However, this will reduce the spectral efficiency of the interfering cell, because after the transmission power of the user terminals in the overlapping coverage area is reduced, in order to achieve the BLER value required by the user, the number of RBs and / or the modulation and coding order corresponding to the user terminals in the overlapping coverage area will be reduced to meet the convergence of BLER.

[0086] It should be noted that if the spectrum efficiency of the interference source cell has been lower than or equal to the second spectrum efficiency threshold, it means that the spectrum efficiency of the interference source cell is already low, which may be caused by noise floor or coverage. In order to meet the block error rate requirement of the user terminal service under the interference source cell, the interference source cell cannot continue to continuously reduce the transmission power of the user terminal for the noise floor of the interfered cell.

[0087] In an optional embodiment, after the transmission power of the user terminal in the overlapping coverage area is reduced, the method further comprises:

[0088] sending a first response message corresponding to the first notification message to the interfered cell, so that the interfered cell updates the current noise floor and spectrum efficiency of the interfered cell according to the first response message, and the first response message is used to indicate that the joint power control is completed.

[0089] Specifically, the interference source cell sends a first response message corresponding to the first notification message to the interfered cell, which is used to indicate that the joint power control is completed. The interfered cell receives the first response message corresponding to the first notification message sent by the interference source cell, and updates the current noise floor and spectrum efficiency of itself based on the first response message.

[0090] It is worth mentioning that the present application is suitable for large traffic scenarios with serious overlapping coverage and user service concentration. Based on the adjustment of the transmission power of the user terminal in the overlapping coverage area, the adjacent cell noise floor control is performed, a balance point between spectrum efficiency and noise floor is obtained, user perception is sought, the purpose of reducing noise floor is achieved through the control of the transmission power of the user terminal, so that a certain spectrum efficiency is achieved under the condition that the noise floor is acceptable, the noise floor is reduced to a certain extent, the spectrum efficiency is improved, and the demand of a large number of users for concentrated service in large traffic scenarios is basically met.

[0091] In a specific embodiment, taking the holding of a large concert in a stadium as an example, there are 5G in the current stadium, which are stadium, south of stadium and north of stadium, each with 2 sectors, each sector opens 3.4 and 3.5 two carriers, and the time slot ratio is set to 7:3, a total of 12 cell coverage venues. However, according to the large traffic index statistics of the stadium on the busiest night of the concert, the noise floor of the cell in the stadium is as high as-80, the spectrum efficiency is extremely low, and the connection rate is greatly affected. Among them, the large traffic index in the stadium is shown in Table 1.

[0092] Table 1: Large traffic index in the stadium

[0093]

[0094] Under the existing TDD (Time Division Duplexing) system, the relationship between the floor noise and the spectrum efficiency of the existing network in a day is counted, and the spectrum efficiency is up to 14.3 bit / s / Hz and the average spectrum efficiency is 3.5 bit / s / Hz by using 7:3 time slot ratio (the influence of time slot ratio on bandwidth is not considered for the time being). The relationship between the spectrum efficiency and the floor noise is shown as Figure 3

[0095] As can be seen from the comparison, the lifting of the floor noise in the stadium where the concert is held has a great influence on the network capacity and the user's perception.

[0096] Specifically, based on the above large traffic scenario, the floor noise suppression method can specifically include the following steps as shown in Figure 4

[0097] Step 1: Obtain the spectrum efficiency information of different cells in the stadium, filter the cells with spectrum efficiency lower than the set second spectrum efficiency threshold, and obtain the floor noise value of these low spectrum efficiency cells, filter out the cells with floor noise value higher than the set floor noise threshold (i.e. the interfered cells). And notify the surrounding interference source cells that the current cell has high floor noise leading to low spectrum efficiency, and needs to reduce the floor noise through joint power control to increase the spectrum efficiency.

[0098] Step 2: The surrounding interference source cells issue measurement configuration to the user terminals;

[0099] Step 3: The user terminals measure according to the measurement configuration issued by the base station, and report the measurement report to the base station;

[0100] Step 4: The interference source cells analyze the measurement report reported by the user terminals, if the level value of the interference source cells measured by the user terminals and the level value of the interfered cells are within 6dB, it is judged that the user terminal is in the overlapping coverage area of the interference source cells and the interfered cells, and the user terminal has too high transmit power which has a significant impact on the floor noise of the interfered cells;

[0101] Step 5: Determine whether to reduce the transmit power of the user terminals in the overlapping coverage area according to the spectrum efficiency of the interference source cells, wherein the calculation formula based on the actual transmit power of the UE (user terminal) is:

[0102] P = min(P MAX ,P0(j)+∝·PL(q)+f(l)+10lg(2 μ ·M)+Δ TF ) Formula 1

[0103] Wherein, P MAX ​​Pmax is the maximum transmit power of the UE, P0(j) is the desired received power level of the gNodeB (5G base station), j represents that the user terminal transmits different signals or channels, a is a path loss compensation factor, PL(q) is the estimated path loss, q is the index of the reference signal used to measure the path loss, f(l) is the closed loop part, l is the index of the closed loop power control adjustment, 10lg(2 μ ·M)+Δ TF is other power adjustment, mainly related to resource allocation, link adaptation, etc. In the above formula, P0(j)+a·PL(q) is the open loop power control part, which is configured and adjusted by high layer signaling;

[0104] The specific way of whether the transmit power of the user terminal in the overlapping coverage area can be reduced according to the spectrum efficiency of the interference source cell is as follows:

[0105] (1) If the spectrum efficiency of the interference source cell is very high, higher than or equal to a set first spectrum efficiency threshold, it means that the overall transmission quality of the interference source cell is good, then the P0 value (that is, the nominal power value that the gNodeB expects to receive, the larger the parameter setting, the higher the user terminal transmit power, the higher the probability of correct signal reception by the base station, and the greater the interference to the neighboring cell; the smaller the parameter setting, the lower the user terminal transmit power, the lower the probability of correct signal reception by the base station, and the smaller the interference to the neighboring cell) of the user terminal in the overlapping coverage area can be reduced, that is, the interference to the interfered cell can be reduced by reducing the power compensation of the user terminal to the path loss part, as can be seen from formula 1, the reduction of P0 and a value can reduce the requirement for the user terminal transmit power, this way can reduce the transmit power of all user terminals in the cell, of course, the transmit power of the user terminal in the overlapping coverage area can also be reduced, so as to reduce the influence of the bottom noise lifting of the interfered cell. This way can maintain the original wireless resource allocation and modulation and coding mode under the premise of meeting the block error rate requirement, and has relatively small influence on the spectrum efficiency.

[0106] (2) If the spectrum efficiency of the interference source cell is lower than the first spectrum efficiency threshold and higher than the second spectrum efficiency threshold (the first spectrum efficiency threshold is greater than the second spectrum efficiency threshold), the P0 and a values of the cell are not changed, and the user terminal in the overlapping coverage area is notified by the gNodeB to reduce the transmit power, so as to reduce the influence of the bottom noise lifting of the interfered cell. However, this way will reduce the spectrum efficiency of the cell, because after the transmit power of the user terminal is reduced, in order to meet the BLER value required by the user for the service, the RB number is reduced, or the modulation and coding order is reduced to meet the convergence of BLER.

[0107] (3) If the spectrum efficiency of the interference source cell has been lower than or equal to the second spectrum efficiency threshold, it is indicated that the spectrum efficiency of the interference source cell is already low, possibly due to noise floor or coverage, and the user terminal transmission power cannot be continuously reduced for the noise floor of the interfered cell in order to meet the block error rate requirement of the user terminal service.

[0108] Step 6: The base station of the interference source cell evaluates whether the power or modulation and coding scheme of the user terminal in the overlapping coverage area can be reduced, and then sends a DCI (Downlink Control Information) message to the user terminal.

[0109] Step 7: After the user terminal completes the execution, an ACK / NACK message is sent back to the base station.

[0110] Step 8: The user terminal power adjustment of the interfered cell is notified to be completed.

[0111] Step 9: The interfered cell updates the current noise floor and spectrum efficiency. The process is repeated and iterated until the balance between the spectrum efficiency and the noise floor is achieved.

[0112] It is worth mentioning that the present application is suitable for reducing the noise floor. The high noise floor cell (i.e. the interfered cell) notifies the surrounding interference source cell that the current high noise floor of the cell leads to low spectrum efficiency, and the purpose of reducing the noise floor needs to be achieved through joint power control. The interference source cell analyzes the measurement report reported by the user terminal, and combines the spectrum efficiency of the interference source cell to adjust the power of the user in the overlapping coverage area of the high noise floor cell and the interference source cell, thereby reducing the lifting of the noise floor of the high noise floor cell. The present application comprehensively considers the noise floor and spectrum efficiency of the high noise floor cell and the interference source cell, adjusts the transmission power of the user terminal in the overlapping coverage area, and tries to achieve a trade-off between the spectrum efficiency and the noise floor, thereby guaranteeing the service requirements of the user.

[0113] The bottom noise suppression method provided by the embodiment of the present application first receives a first notification message sent by a disturbed cell, wherein the first notification message is used to notify an interference source cell that the disturbed cell needs to reduce bottom noise through joint power control; then, according to a measurement report reported by at least one user terminal under the interference source cell, the user terminal in an overlapping coverage area of the interference source cell and the disturbed cell is screened out; finally, in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition, the transmission power of the user terminal in the overlapping coverage area is reduced. The present application notifies the interference source cell by the disturbed cell that the disturbed cell needs to reduce bottom noise through joint power control, so that the interference source cell analyzes the measurement report reported by the user terminal, and adjusts the power of the user terminal in the overlapping coverage area of the interference source cell and the disturbed cell in combination with the spectral efficiency of the interference source cell, thereby suppressing the lifting of the bottom noise of the disturbed cell, guaranteeing the service demand of the user under the disturbed cell, and solving the problem that the existing bottom noise suppression method does not consider the influence of the transmission power of the user terminal under the interference source cell on the bottom noise of the disturbed cell in a large traffic scenario, resulting in poor bottom noise suppression effect.

[0114] Embodiment 2:

[0115] The present embodiment provides a bottom noise suppression method applied to a disturbed cell, as shown in the figure, the method comprises the following steps: Figure 5

[0116] Step S201: a first notification message for notifying an interference source cell that a disturbed cell needs to reduce bottom noise through joint power control is sent to the interference source cell, so that the interference source cell screens out a user terminal in an overlapping coverage area of the interference source cell and the disturbed cell according to a measurement report reported by at least one user terminal under the interference source cell, and reduces the transmission power of the user terminal in the overlapping coverage area in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition.

[0117] Specifically, the first notification message for notifying the interference source cell that the disturbed cell needs to reduce bottom noise through joint power control is sent to the interference source cell by the disturbed cell.

[0118] In an optional embodiment, after the first notification message for notifying the interference source cell that the disturbed cell needs to reduce bottom noise through joint power control is sent to the interference source cell, the method further comprises the following steps:

[0119] A first response message corresponding to the first notification message is received, wherein the first response message is used to indicate that joint power control is completed;

[0120] The current bottom noise and spectral efficiency of the disturbed cell are updated according to the first response message. ​

[0121] Specifically, the interfered cell receives a first response message corresponding to the first notification message sent by the interference source cell to indicate the completion of joint power control, and updates the current own noise floor and spectral efficiency based on the first response message.

[0122] In an optional embodiment, the joint power control condition comprises any one of the following conditions:

[0123] The spectral efficiency of the interference source cell is greater than or equal to a preset first spectral efficiency threshold;

[0124] The spectral efficiency of the interference source cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

[0125] In an optional embodiment, the sending of the first notification message to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the noise floor through joint power control specifically comprises:

[0126] When it is detected that the spectral efficiency of the interfered cell is less than the second spectral efficiency threshold and the noise floor of the interfered cell is greater than a preset noise floor threshold, the first notification message is sent to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the noise floor through joint power control; or,

[0127] When the first indication information sent by the target system is received, the first notification message is sent to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the noise floor through joint power control, wherein the first indication information is sent by the target system when it is detected that the spectral efficiency of the interfered cell is less than the second spectral efficiency threshold and the noise floor of the interfered cell is greater than the noise floor threshold.

[0128] Specifically, when the interfered cell detects that the spectral efficiency of the interfered cell is lower than the set second spectral efficiency threshold and the noise floor of the interfered cell is higher than the set noise floor threshold, or when the interfered cell receives the first indication information sent by the target system when it is detected that the spectral efficiency of the interfered cell is lower than the second spectral efficiency threshold and the noise floor of the interfered cell is higher than the noise floor threshold, the interfered cell sends the first notification message to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the noise floor through joint power control.

[0129] Embodiment 3:

[0130] As shown in Figure 6 The present embodiment provides a noise floor suppression device arranged in an interference source cell and used for executing the noise floor suppression method in Embodiment 1, comprising:

[0131] The first receiving module 11 is configured to receive a first notification message sent by the interfered cell, and the first notification message is used to inform the interference source cell that the interfered cell needs to reduce the floor noise through joint power control.

[0132] The screening module 12 is connected with the first receiving module 11, and is configured to screen a user terminal in an overlapping coverage area of the interference source cell and the interfered cell according to a measurement report reported by at least one user terminal under the interference source cell.

[0133] The reducing module 13 is connected with the screening module 12, and is configured to reduce the transmission power of the user terminal in the overlapping coverage area in response to the fact that the spectral efficiency of the interference source cell meets a joint power control condition.

[0134] Further, the apparatus further comprises:

[0135] The issuing module is configured to issue a measurement configuration to the at least one user terminal under the interference source cell, and the measurement configuration is used to instruct the user terminal to measure the interference source cell and the interfered cell.

[0136] The second receiving module is configured to receive a measurement report reported by the at least one user terminal after the at least one user terminal measures the interference source cell and the interfered cell according to the measurement configuration.

[0137] Further, the screening module 12 is specifically configured to:

[0138] For each of the at least one user terminal under the interference source cell, if the level values of the interference source cell and the interfered cell in the measurement report reported by the user terminal are within a preset range, the user terminal is taken as the user terminal in the overlapping coverage area.

[0139] Further, the reducing module 13 specifically comprises:

[0140] The first reducing unit is configured to reduce the transmission power of the user terminal in the overlapping coverage area by reducing the base station expected receiving power of the interference source cell and / or reducing the power compensation of the path loss of the user terminal under the interference source cell, if the spectral efficiency of the interference source cell is greater than or equal to a preset first spectral efficiency threshold.

[0141] The second reducing unit is configured to reduce the transmission power of the user terminal in the overlapping coverage area by reducing the number of resource blocks (RBs) corresponding to the user terminal and / or the order of modulation and coding, if the spectral efficiency of the interference source cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

[0142] Further, the apparatus further comprises:

[0143] a sending response module, configured to send a first response message corresponding to the first notification message to the interfered cell, so that the interfered cell updates the current noise floor and spectral efficiency of the interfered cell according to the first response message, and the first response message is used to indicate that joint power control is completed.

[0144] Embodiment 4:

[0145] As shown in Figure 7 the embodiment provides a noise floor suppression apparatus arranged in an interfered cell, used to execute the noise floor suppression method in Embodiment 2, comprising:

[0146] a sending module 21, configured to send a first notification message to a source cell of interference, the first notification message being used to notify the source cell of interference that the interfered cell needs to reduce the noise floor through joint power control, so that the source cell of interference selects user terminals in an overlapping coverage area of the source cell of interference and the interfered cell according to a measurement report reported by at least one user terminal under the source cell of interference, and reduces the transmission power of the user terminals in the overlapping coverage area in response to the spectral efficiency of the source cell of interference meeting a joint power control condition.

[0147] Further, the apparatus further comprises:

[0148] a receiving response module, configured to receive a first response message corresponding to the first notification message sent by the source cell of interference, and the first response message is used to indicate that joint power control is completed;

[0149] an updating module, configured to update the current noise floor and spectral efficiency of the interfered cell according to the first response message.

[0150] Further, the joint power control condition comprises any one of the following conditions:

[0151] the spectral efficiency of the source cell of interference is greater than or equal to a preset first spectral efficiency threshold;

[0152] the spectral efficiency of the source cell of interference is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, and the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

[0153] Further, the sending module 21 is specifically configured to:

[0154] When it is detected that the spectral efficiency of the interfered cell is less than the second spectral efficiency threshold and the bottom noise of the interfered cell is greater than a preset bottom noise threshold, a first notification message is sent to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the bottom noise through joint power control.

[0155] When the first indication information sent by the target system is received, a first notification message is sent to the interference source cell to inform the interference source cell that the interfered cell needs to reduce the bottom noise through joint power control, wherein the first indication information is sent by the target system when it is detected that the spectral efficiency of the interfered cell is less than the second spectral efficiency threshold and the bottom noise of the interfered cell is greater than the bottom noise threshold.

[0156] Embodiment 5

[0157] Reference Figure 8 The embodiment provides a bottom noise suppression device, which comprises a memory 31 and a processor 32, the memory 31 stores a computer program, and the processor 32 is configured to run the computer program to execute the bottom noise suppression method in the embodiment 1 or execute the bottom noise suppression method in the embodiment 2.

[0158] The memory 31 is connected with the processor 32, the memory 31 can adopt a flash memory or a read-only memory or other memories, and the processor 32 can adopt a central processing unit or a single-chip microcomputer.

[0159] Embodiment 6

[0160] The embodiment provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the bottom noise suppression method in the above-mentioned embodiment 1 or embodiment 2.

[0161] The computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, computer program modules or other data. The computer-readable storage medium includes, but is not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disc (DVD) or other optical disc storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer.

[0162] In summary, the noise suppression method, device and computer readable storage medium provided by the embodiment of the present application first receive the first notification message sent by the interfered cell, the first notification message is used to inform the interference source cell that the interfered cell needs to reduce the noise by joint power control; then, according to the measurement report reported by at least one user terminal under the interference source cell, the user terminal in the overlapping coverage area of the interference source cell and the interfered cell is screened out; finally, in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition, the transmit power of the user terminal in the overlapping coverage area is reduced. The present application informs the interference source cell by the interfered cell that it needs to reduce the noise by joint power control, so that the interference source cell analyzes the measurement report reported by the user terminal, and adjusts the power of the user terminal in the overlapping coverage area of the interference source cell and the interfered cell in combination with the spectral efficiency of the interference source cell, thereby suppressing the lifting of the noise of the interfered cell, guaranteeing the service demand of the user under the interfered cell, and solving the problem that the existing noise suppression method does not consider the influence of the transmit power of the user terminal under the interference source cell on the noise of the interfered cell in a large traffic scenario, resulting in poor noise suppression effect.

[0163] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. A method of noise floor suppression, the method comprising: The method applied to an interference source cell comprises: receiving a first notification message sent by a disturbed cell, the first notification message being used for notifying the interference source cell that the disturbed cell needs to reduce floor noise through joint power control; screening out user terminals in an overlapping coverage area of the interference source cell and the disturbed cell according to measurement reports reported by at least one user terminal under the interference source cell; in response to a spectrum efficiency of the interference source cell satisfying a joint power control condition, reducing transmission power of the user terminals in the overlapping coverage area; the response to the spectrum efficiency of the interference source cell satisfying the joint power control condition, the transmission power of the user terminals in the overlapping coverage area is reduced specifically by: if the spectrum efficiency of the interference source cell is greater than or equal to a preset first spectrum efficiency threshold, reducing the transmission power of the user terminals in the overlapping coverage area by reducing base station expected receiving power of the interference source cell and / or reducing power compensation of the user terminals under the interference source cell to path loss; if the spectrum efficiency of the interference source cell is less than the first spectrum efficiency threshold and greater than a preset second spectrum efficiency threshold, reducing the transmission power of the user terminals in the overlapping coverage area by reducing a number of resource blocks RBs corresponding to the user terminals in the overlapping coverage area and / or a modulation and coding order.

2. The method of claim 1, wherein, Before the screening out of the user terminals in the overlapping coverage area of the interference source cell and the disturbed cell according to the measurement reports reported by the at least one user terminal under the interference source cell, the method further comprises: downloading, to the at least one user terminal under the interference source cell, measurement configuration used for instructing the user terminals to measure the interference source cell and the disturbed cell; receiving measurement reports reported by the at least one user terminal after the at least one user terminal measures the interference source cell and the disturbed cell according to the measurement configuration.

3. The method of claim 2, wherein, The screening out of the user terminals in the overlapping coverage area of the interference source cell and the disturbed cell according to the measurement reports reported by the at least one user terminal under the interference source cell comprises specifically: for each of the at least one user terminal under the interference source cell, if a level value of the interference source cell and a level value of the disturbed cell in the measurement report reported by the user terminal are within a preset range, the user terminal is taken as a user terminal in the overlapping coverage area.

4. The method of claim 1, wherein, After the reducing of the transmission power of the user terminals in the overlapping coverage area, the method further comprises: sending a first response message corresponding to the first notification message to the disturbed cell, so that the disturbed cell updates current floor noise and spectrum efficiency of the disturbed cell according to the first response message, the first response message being used for indicating that joint power control is completed.

5. A method of noise floor suppression, the method comprising: The method applied to a disturbed cell comprises: sending a first notification message to a source cell to inform the source cell that a victim cell needs to reduce floor noise by joint power control, so that the source cell screens out user terminals in an overlapping coverage area of the source cell and the victim cell according to measurement reports reported by at least one user terminal under the source cell, and reduces transmission power of the user terminals in the overlapping coverage area in response to a spectrum efficiency of the source cell meeting a joint power control condition; the response to the spectrum efficiency of the source cell meeting the joint power control condition includes: if the spectrum efficiency of the source cell is greater than or equal to a preset first spectrum efficiency threshold, reducing the transmission power of the user terminals in the overlapping coverage area by reducing base station expected reception power of the source cell and / or reducing power compensation of the user terminals under the source cell to path loss; if the spectrum efficiency of the source cell is less than the first spectrum efficiency threshold and greater than a preset second spectrum efficiency threshold, reducing the transmission power of the user terminals in the overlapping coverage area by reducing a number of resource blocks (RBs) corresponding to the user terminals and / or a modulation and coding order.

6. The method of claim 5, wherein, after the first notification message is sent to the source cell, the method further includes: receiving a first response message corresponding to the first notification message and sent by the source cell, the first response message being used to indicate that joint power control is completed; updating current floor noise and spectrum efficiency of the victim cell according to the first response message.

7. The method of claim 5, wherein, the joint power control condition includes any one of the following conditions: the spectrum efficiency of the source cell is greater than or equal to a preset first spectrum efficiency threshold; the spectrum efficiency of the source cell is less than the first spectrum efficiency threshold and greater than a preset second spectrum efficiency threshold, and the first spectrum efficiency threshold is greater than the second spectrum efficiency threshold.

8. The method of claim 7, wherein, the first notification message sent to the source cell includes: when it is detected that the spectrum efficiency of the victim cell is less than the second spectrum efficiency threshold and floor noise of the victim cell is greater than a preset floor noise threshold, sending the first notification message to the source cell to inform the source cell that the victim cell needs to reduce floor noise by joint power control; or when receiving first indication information sent by a target system, sending the first notification message to the source cell to inform the source cell that the victim cell needs to reduce floor noise by joint power control, wherein the first indication information is sent by the target system when it is detected that the spectrum efficiency of the victim cell is less than the second spectrum efficiency threshold and floor noise of the victim cell is greater than the floor noise threshold.

9. A noise floor suppression apparatus, characterized by, the device is arranged in a source cell, and the device includes: The first receiving module is configured to receive a first notification message sent by a disturbed cell, wherein the first notification message is used to inform an interference source cell that the disturbed cell needs to reduce the floor noise by joint power control; The screening module is connected with the first receiving module and is configured to screen user terminals in an overlapping coverage area of the interference source cell and the disturbed cell according to a measurement report reported by at least one user terminal under the interference source cell; The reducing module is connected with the screening module and is configured to reduce the transmission power of the user terminals in the overlapping coverage area in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition. The reducing module specifically includes: The first reducing unit is configured to reduce the transmission power of the user terminals in the overlapping coverage area by reducing the base station expected receiving power of the interference source cell and / or reducing the power compensation of the user terminals under the interference source cell to the path loss if the spectral efficiency of the interference source cell is greater than or equal to a preset first spectral efficiency threshold. The second reducing unit is configured to reduce the transmission power of the user terminals in the overlapping coverage area by reducing the number of resource blocks (RBs) corresponding to the user terminals in the overlapping coverage area and / or the order of modulation and coding if the spectral efficiency of the interference source cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

10. A noise floor suppression apparatus, characterized by, The device is arranged in a disturbed cell, and the device includes: The sending module is configured to send a first notification message to an interference source cell, wherein the first notification message is used to inform the interference source cell that the disturbed cell needs to reduce the floor noise by joint power control, so that the interference source cell screens user terminals in an overlapping coverage area of the interference source cell and the disturbed cell according to a measurement report reported by at least one user terminal under the interference source cell, and reduces the transmission power of the user terminals in the overlapping coverage area in response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition. The response to the fact that the spectral efficiency of the interference source cell meets the joint power control condition and the reduction of the transmission power of the user terminals in the overlapping coverage area specifically include: The transmission power of the user terminals in the overlapping coverage area is reduced by reducing the base station expected receiving power of the interference source cell and / or reducing the power compensation of the user terminals under the interference source cell to the path loss if the spectral efficiency of the interference source cell is greater than or equal to a preset first spectral efficiency threshold. The transmission power of the user terminals in the overlapping coverage area is reduced by reducing the number of resource blocks (RBs) corresponding to the user terminals in the overlapping coverage area and / or the order of modulation and coding if the spectral efficiency of the interference source cell is less than the first spectral efficiency threshold and greater than a preset second spectral efficiency threshold, wherein the first spectral efficiency threshold is greater than the second spectral efficiency threshold.

11. A noise floor suppression apparatus, comprising: A computer readable storage medium having stored therein a computer program, which, when executed by a processor, implements the noise floor suppression method according to any one of claims 1-4, or the noise floor suppression method according to any one of claims 5-8.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored therein a computer program, which, when executed by a processor, implements the noise floor suppression method according to any one of claims 1-4, or the noise floor suppression method according to any one of claims 5-8.

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