WO2018103511A1

WO2018103511A1 - Interference suppression method and device, and telecommunication system

Info

Publication number: WO2018103511A1
Application number: PCT/CN2017/111032
Authority: WO
Inventors: 徐飞; 张超群
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-12-07
Filing date: 2017-11-15
Publication date: 2018-06-14
Also published as: CN108173789A

Abstract

The embodiments of the invention provide an interference suppression method and device, and a telecommunication system. The interference suppression method comprises: acquiring, by a BBU, a quantity of user terminals in a cell to be tested; and when the quantity is less than a first threshold and interference is present in the cell to be tested, transmitting, to a RRU, designated information of the cell to be tested, to enable the RRU to suppress the interference in the cell to be tested.

Description

Interference suppression method and device, communication system

Technical field

The present invention relates to the field of communications, and in particular to an interference suppression method and apparatus, and a communication system.

Background technique

At present, the universal mobile telecommunications system (UMTS) uplink narrowband interference is a common defect that affects the performance of the service. Most of the performance indicators of the external field are caused by the narrowband interference of the uplink.

The normal multiple users will cause uplink interference. The Global System for Mobile communication (GSM) will also cause uplink interference to the UMTS. The broadcast signal or other signal transmission sources will also interfere with the uplink signal of the UMTS. The method based on the current identification of uplink narrowband interference is based on the channel estimation matrix of the pilot symbols and the noise interference matrix, and the pre-calculation factor corresponding to the pilot symbols is obtained to correct the noise interference, which is not effective for all scenarios. For these uplink interferences, a strategy is needed to identify and suppress interference, thereby reducing the impact on normal services, but there is no effective solution in the related art.

Summary of the invention

The embodiments of the present invention provide an interference suppression method and apparatus, and a communication system, to at least solve the problem that the interference suppression scheme in the related art adapts to a limited scenario.

According to an embodiment of the present invention, an interference suppression method is provided, including: a Baseband Processing Unit (BBU) to acquire a number of user terminals in a cell to be tested; where the number is less than a first threshold When the cell to be tested has interference, the specified information of the cell to be tested is sent to a remote radio unit (Radio Remote Unit, RRU for short), so that the RRU performs interference suppression on the cell to be tested.

According to another embodiment of the present invention, an interference suppression method is provided, including: an RRU receiving designation information of an interfering cell sent by a BBU, where the interfering cell is the BBU a cell determined when the number of user terminals in the cell to be tested is less than a first threshold and the cell to be tested has interference; and the RRU performs interference suppression on the interfering cell.

According to another embodiment of the present invention, an interference suppression method is provided, including: acquiring a quantity of user terminals in a cell to be tested; and when the quantity is less than a first threshold and the cell to be tested has interference, The cell to be tested performs interference suppression.

According to another embodiment of the present invention, an interference suppression apparatus is provided, which is applied to a BBU, and includes: an obtaining module, configured to acquire a quantity of user terminals in a cell to be tested; and a sending module, configured to be smaller than the first quantity When the threshold is used and the cell to be tested has interference, the specified information of the cell to be tested is sent to the RRU, so that the RRU performs interference suppression on the cell to be tested.

According to another embodiment of the present invention, there is provided an interference suppression apparatus, which is applied to an RRU, the apparatus comprising: a receiving module, configured to receive designation information of an interfering cell transmitted by a BBU, where the interfering cell is the The BBU determines, in the cell to be tested, that the number of user terminals is smaller than the first threshold and the cell to be tested has interference, and the interference suppression module is configured to perform interference suppression on the interference cell according to the specified information.

According to another embodiment of the present invention, an interference suppression apparatus is provided, including: an acquisition module, configured to acquire a quantity of user terminals in a cell to be tested; and an interference suppression module configured to: when the quantity is less than a first threshold When there is interference in the cell to be tested, interference suppression is performed on the cell to be tested.

According to still another embodiment of the present invention, a communication system is provided, including: a BBU, configured to acquire a quantity of user terminals in a cell to be tested; and when the quantity is less than a first threshold and the cell to be tested has interference, Sending the specified information of the cell to be tested to the RRU; and receiving an interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information by the RRU; and the RRU is configured to receive the specified information, And performing interference suppression on the cell to be tested.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is configured to store program code for performing the following steps: the BBU acquires the number of user terminals in the cell to be tested; and when the number is less than the first threshold and the cell to be tested has interference, the The specified information of the measured cell is sent to the RRU; the interference suppression result obtained by the BBU receiving the interference suppression by the RRU according to the specified information to the cell to be tested is that the quantity is less than a first threshold and the cell to be tested exists. When the interference is received, the specified information of the cell to be tested is sent to the RRU; and the BBU receives the interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is arranged to store program code for performing the following steps:

The RRU receives the designation information of the interfering cell sent by the baseband processing unit BBU, where the interfering cell is a cell that is determined when the number of user terminals in the cell to be tested is smaller than a first threshold and the cell to be tested has interference; The RRU performs interference suppression on the interfering cell.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is configured to store the program code for performing the following steps: acquiring the number of user terminals in the cell to be tested; and when the number is less than the first threshold and the cell to be tested has interference, performing the cell to be tested Interference suppression.

According to the embodiment of the present invention, the base station can determine whether to perform interference suppression according to the number of user terminals and whether the cell has interference. Therefore, the interference analysis is performed in an adaptive manner, the interference mode is determined, and the suppression is performed. Reducing the personnel cost of operation and maintenance is also beneficial to improve the performance index of the whole network, and then solve the problem that the interference suppression scheme adapts to the limited scene.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic structural diagram of each module in a Node B (Node B) according to an embodiment of the present invention;

2 is a flowchart of operations between modules in an optional NodeB according to Embodiment 1 of the present invention;

3 is a schematic flow chart of an interference suppression method according to Embodiment 1 of the present invention;

4 is a flowchart of an interference suppression method according to Embodiment 2 of the present invention;

Figure 5 is a block diagram showing the structure of an interference suppression apparatus according to Embodiment 3 of the present invention;

Figure 6 is a block diagram showing another structure of an interference suppression apparatus according to Embodiment 3 of the present invention;

7 is a flowchart of an interference suppression method according to Embodiment 4 of the present invention;

Figure 8 is a block diagram showing the structure of an interference suppression apparatus according to Embodiment 5 of the present invention;

Figure 9 is a block diagram showing another structure of an interference suppressing apparatus according to Embodiment 5 of the present invention;

Figure 10 is a flowchart of an interference suppression method according to Embodiment 6 of the present invention;

Figure 11 is a block diagram showing the structure of an interference suppressing apparatus according to Embodiment 7 of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Example 1

The present embodiment provides a Node B (base station). As shown in FIG. 1 , the Node B includes: a service control module 10, an interference sweeping module 12, and an interference suppression module 14, where:

The service control module 10 of the BBU counts the number of users in each cell. If there are too many cell users, the interference is normal. When the number of users in the cell is small, but there is strong interference, the specified information of the interfering cell needs to be The RRU unit of the RRU is sent to the RRU unit where the RRU is located for further troubleshooting. Perform FTT (fast Fourier transform), if interference is found, the interference suppression module 14 is notified to suppress the interference; the interference suppression module 14 of the RRU performs interference suppression and notifies the service control module 10 of the effect of detecting the interference suppression; and the service control module 10 detects the interference suppression. Whether there is still interference for a certain period of time, if there is an interference suppression module 14 indicating that the suppression invalidation notification RRU is canceled.

The following describes how the NodeB comprehensively detects interference and performs interference suppression in conjunction with FIG. 2 and FIG. 3.

Step 1: As shown in FIG. 2 and FIG. 3, the BBU service control module monitors the traffic volume of the cell by using the n-hour period. If the cell traffic exceeds the threshold value k1, the cell traffic is skipped. It is judged whether the RTWP is greater than the threshold RTWP_max, and if it is greater than the threshold, it indicates that there is interference and notifies the RRU that the frequency needs to be swept.

Step 2: The interference sweeping module of the RRU scans the channel and the carrier indicated by the specified information according to the specified information of the transmitted cell, and the method for determining is: extracting the sampling point to perform FTT (Fast Fourier Transform), and if interference is detected, A suppression indication message is sent to the interference suppression module, where the message indicates that the carrier frequency and the port number need to be suppressed.

Step 3: The interference suppression module of the RRU determines interference suppression according to the suppression indication sent by the frequency sweeping module and the interference suppression adaptive switch of the NodeB itself. If the suppression is performed, the service control module is notified to detect the suppression effect.

Step 4: The service control module of the BBU detects the carrier frequency and channel number of the suppression reported by the suppression module, and detects that the corresponding carrier frequency and the RTWP difference before the channel is started and started are greater than the threshold value RTWP_delta; otherwise, the interference of the RRU is notified. The suppression module turns off interference suppression until the next cycle.

In the embodiment of the present invention, the interference analysis is performed in an adaptive manner, the frequency is determined by the frequency sweep, and the suppression is performed, and finally the effect detection is suppressed. Eliminate interference with a series of automated operations, which not only reduces the cost of personnel for operation and maintenance, but also improves the performance of the entire network.

Through the description of the above embodiments, those skilled in the art can clearly understand the roots. The method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be through hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

Example 2

Based on Embodiment 1, an interference suppression method is further provided in this embodiment. As shown in FIG. 4, the method includes:

Step S402, the BBU acquires the number of user terminals in the cell to be tested.

Step S404: When the number is less than the first threshold and the cell to be tested has interference, send the specified information of the cell to be tested to the RRU. Optionally, determining that the cell to be tested has interference when the BBU detects that the traffic of the cell to be tested is less than a second threshold, and the RTWP of the cell to be tested is greater than a third threshold, determining that the cell to be tested exists. Interference; wherein, if the number of the foregoing user terminals is less than the first threshold, it indicates that the cell traffic is not very large, but if the RTWP of the cell to be tested is greater than the threshold (ie, the second threshold), then It is considered that there is interference.

It should be noted that the foregoing first threshold, the second threshold, the third threshold, and the fourth threshold may be flexibly set according to actual needs, or determined according to a limited experiment.

Step S406: The BBU receives an interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information by the RRU.

It should be noted that step S406 is an optional step, that is, in the actual application process, whether the step needs to be performed may be determined as needed.

Optionally, the foregoing specified information includes, but is not limited to, a channel and/or a carrier frequency used by the cell to be tested.

In an optional embodiment, after the BBU receives the interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information, the BBU receives the interference suppression result according to the specified information, and the difference indicated by the interference suppression result is less than When the threshold is preset, the BBU notifies the RRU to cancel the interference suppression, where the difference is the difference between the RTWP after the interference suppression of the cell to be tested and the RTWP before the interference to the cell to be tested.

Example 3

In the embodiment, an interference suppression device is also provided, which is applied to the BBU, and the device is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated. As shown in Figure 5, the device includes:

The obtaining module 50 is configured to obtain the number of user terminals in the cell to be tested;

The sending module 52 is configured to send the specified information of the to-be-tested cell to the remote radio unit RRU when the quantity is less than the first threshold and the cell to be tested has interference;

The receiving module 54 is configured to receive an interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information by the RRU.

It should be noted that the receiving module 54 is an optional module, that is, whether the module needs to be set according to actual needs during actual application.

Optionally, as shown in FIG. 6, the foregoing apparatus further includes: a notification module 56, configured to notify the RRU to cancel interference suppression when the difference indicated by the interference suppression result is less than a preset threshold, where the difference is The difference between the RTWP after the interference suppression is performed on the cell to be tested and the RTWP before the interference with the cell to be tested.

It should be noted that the functions implemented by the obtaining module 50, the sending module 52, the receiving module 54, and the notification module 56 in this embodiment are equivalent to those of the service control module 10 in Embodiment 1, but the service control module 10 can implement the above. More features of the module.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

Example 4

This embodiment further provides an interference suppression method. As shown in FIG. 7, the method includes:

In step S702, the RRU receives the designation information of the interfering cell sent by the baseband processing unit BBU, where the interfering cell is the cell determined by the BBU when the number of user terminals in the cell to be tested is less than the first threshold and the cell to be tested has interference;

Step S704, the RRU performs interference suppression on the interference cell.

Optionally, after the RRU performs interference suppression on the interfering cell, the RRU periodically sends an interference suppression result to the BBU; the RRU receives the notification sent by the BBU, where the notification is used to indicate that the RRU cancels interference suppression, and the notification is The notification is sent when the difference indicated by the interference suppression result is less than the preset threshold, and the difference is the difference between the RTWP after the interference suppression of the interfering cell and the RTWP before the interference to the interfering cell.

Optionally, before the RRU performs interference suppression on the interfering cell, the RRU samples the carrier and/or channel used by the interfering cell, performs fast Fourier transform FFT on the sampled value, and determines interference according to the FFT result. The method performs interference suppression on the interference cell according to the foregoing interference mode.

It should be noted that the preferred embodiment in this embodiment can be referred to the related description in Embodiment 1 or 2, and details are not described herein again.

Example 5

The present embodiment provides an interference suppression apparatus, which is applied to an RRU, and is used to implement the foregoing method in Embodiment 4. As shown in FIG. 8, the apparatus includes:

The receiving module 80 is configured to receive the specified information of the interfering cell sent by the BBU, where the interfering cell is a cell that is determined when the number of user terminals in the cell to be tested is smaller than a first threshold and the cell to be tested has interference;

The interference suppression module 82 is configured to perform interference suppression on the interference cell according to the specified information.

Optionally, as shown in FIG. 9, the foregoing apparatus further includes: a sending module 84, configured to periodically send an interference suppression result to the BBU;

The receiving module 80 is further configured to receive the notification sent by the BBU, where the notification is used to indicate the RRU cancellation interference suppression, where the notification is a notification sent when the difference indicated by the interference suppression result is less than a preset threshold, The difference is the difference between the RTWP after interference suppression for the interfering cell and the RTWP before interference with the interfering cell.

It should be noted that the receiving module 80 in this embodiment is equivalent to the interference sweeping module 12 described in Embodiment 1, but the interference sweeping module 12 can implement more functions than the receiving module 80; the interference suppression module 82 and The transmission module 84 is equivalent to the interference suppression module 14 in the first embodiment, but the interference suppression module 14 can implement more functions than the interference suppression module 82 and the transmission module 84.

Example 6

This embodiment provides an interference suppression method. As shown in FIG. 10, the method includes:

Step S1002: The base station acquires the number of user terminals in the cell to be tested.

Step S1004: When the number is less than the first threshold and the cell to be tested has interference, the base station performs interference suppression on the cell to be tested.

Optionally, after performing interference suppression on the cell to be tested, the foregoing base station periodically acquires an interference suppression result for the cell to be tested; and the difference indicated by the interference suppression result is less than a preset. At the threshold, the base station cancels interference suppression on the interfering cell, wherein the difference is a difference between an RTWP after performing interference suppression on the interfering cell and an RTWP before interfering with the interfering cell.

Example 7

The embodiment further provides an interference suppression device. As shown in FIG. 11, the device includes:

The obtaining module 110 is configured to obtain the number of user terminals in the cell to be tested;

The interference suppression module 112 is configured to perform interference suppression on the to-be-tested cell when the quantity is less than the first threshold and the cell to be tested has interference.

Optionally, the acquiring module 110 is further configured to periodically acquire an interference suppression result for the to-be-tested cell, where the interference suppression module 112 is further configured to: when the difference indicated by the interference suppression result is less than a preset threshold, The interference suppression on the interfering cell is cancelled, wherein the difference is a difference between an RTWP after performing interference suppression on the interfering cell and an RTWP before interfering with the interfering cell.

Example 8

The embodiment further provides a communication system, including: a BBU, configured to acquire the number of user terminals in the cell to be tested; and when the quantity is less than the first threshold and the cell to be tested has interference, the specified information of the cell to be tested is set. Sending to the remote radio unit RRU; and receiving an interference suppression result obtained by the RRU performing interference suppression on the to-be-tested cell according to the specified information; and the RRU is configured to receive the specified information, and perform interference suppression on the to-be-tested cell.

Optionally, the foregoing BBU is further configured to notify the RRU to cancel interference suppression when the difference indicated by the interference suppression result is less than a preset threshold, where the difference is The difference between the RTWP after the interference suppression is performed by the cell to be tested and the RTWP before the interference with the cell to be tested.

Example 9

The embodiment of the invention further provides a storage medium. The storage medium is configured to store program code for performing the following steps: the BBU acquires the number of user terminals in the cell to be tested; and when the number is less than the first threshold and the cell to be tested has interference, the cell to be tested is The specified information is sent to the RRU; the BBU receives the interference suppression result obtained by the RRU performing interference suppression on the to-be-tested cell according to the specified information, where the quantity is less than the first threshold and the cell to be tested has interference. And transmitting, by the BBU, the interference suppression result obtained by performing interference suppression on the to-be-tested cell according to the specified information.

Example 10

This embodiment also provides a storage medium. The storage medium is configured to store program code for performing the following steps: the RRU receives the designation information of the interfering cell sent by the baseband processing unit BBU, wherein the interfering cell is the number of user terminals of the BBU in the cell to be tested is smaller than a threshold and the cell to be tested has a cell determined when there is interference; the RRU performs interference suppression on the interfering cell.

Example 11

This embodiment also provides a storage medium. The storage medium is configured to store the program code for performing the following steps: acquiring the number of user terminals in the cell to be tested; and when the number is less than the first threshold and the cell to be tested has interference, performing the cell to be tested Interference suppression.

Optionally, in this embodiment, the foregoing storage medium may include, but is not limited to: a USB flash drive, only A medium that can store program code, such as a read-only memory (ROM), a random access memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

According to the foregoing technical solution provided by the embodiment of the present invention, the base station may determine whether the interference suppression is performed on the cell to be tested according to the number of user terminals and whether the cell has interference. Therefore, the interference analysis is performed in an adaptive manner, and the interference mode is determined and performed. Suppression, which not only reduces the personnel cost of operation and maintenance, but also helps to improve the performance index of the whole network, and then solves the problem that the interference suppression scheme adapts to the limited scene.

Claims

An interference suppression method includes:

The baseband processing unit BBU obtains the number of user terminals in the cell to be tested;

When the number is less than the first threshold and the cell to be tested has interference, the specified information of the cell to be tested is sent to the remote radio unit (RRU), so that the RRU performs interference suppression on the cell to be tested.
The method according to claim 1, wherein the interference of the cell to be tested is determined to be:

And determining, by the BBU, that the traffic of the cell to be tested is less than a second threshold, and that the total bandwidth of the broadband received RTCT of the cell to be tested is greater than a third threshold, determining that the cell to be tested has interference.
The method of claim 1, wherein the designation information comprises: a channel and/or a carrier frequency used by the cell to be tested.
The method according to any one of claims 1 to 3, wherein after the specifying information of the cell to be tested is sent to the RRU, the method further includes:

Receiving, by the BBU, an interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information by the RRU;

When the difference indicated by the interference suppression result is less than a preset threshold, the BBU notifies the RRU to cancel the interference suppression, where the difference is an RTWP and an opposite to the interference suppression of the cell to be tested. The difference between the RTWPs before the interference of the cell to be measured is performed.
An interference suppression method includes:

The remote radio unit RRU receives the designation information of the specified information of the interfering cell sent by the baseband processing unit BBU, where the interfering cell is the number of user terminals of the BBU in the cell to be tested is less than the first threshold and the cell to be tested a cell determined when there is interference;

The RRU performs interference suppression on the interfering cell according to the specified information.
The method according to claim 5, wherein after the RRU performs interference suppression on the interfering cell according to the specified information, the method further includes:

The RRU periodically sends an interference suppression result to the BBU;

Receiving, by the RRU, a notification sent by the BBU when the difference indicated by the interference suppression result is less than a preset threshold, where the notification is used to indicate that the RRU cancels interference suppression, where the difference is the interference The difference between the RTWP after the cell performs interference suppression and the RTWP before the interference to the interfering cell.
The method of claim 5, wherein the specifying information comprises: a channel and/or a carrier frequency used by the cell to be tested.
The method according to any one of claims 5 to 7, wherein before the RRU performs interference suppression on the interfering cell according to the specified information, the method further includes:

The RRU samples the carrier and/or channel used by the interfering cell, and converts the sampled value from a time domain signal to a frequency domain signal by performing fast Fourier transform FFT on the sampled value, in the frequency domain. Find the corresponding interference source and perform interference suppression on the interference source.
An interference suppression method includes:

The base station acquires the number of user terminals in the cell to be tested;

When the number is less than the first threshold and the cell to be tested has interference, the base station performs interference suppression on the cell to be tested.
The method according to claim 9, wherein after the base station performs interference suppression on the cell to be tested, the method further includes:

The base station periodically acquires an interference suppression result for the cell to be tested;

The base station cancels interference suppression on the interfering cell when the difference indicated by the interference suppression result is less than a preset threshold, where the difference is an RTWP and a pair after interference suppression on the interfering cell The difference of the RTWP before the interference cell performs interference.
An interference suppression device is applied to a baseband processing unit BBU, including:

Obtaining a module, configured to obtain the number of user terminals in the cell to be tested;

a sending module, configured to send the specified information of the cell to be tested to the remote radio unit RRU when the quantity is less than the first threshold and the interference exists in the cell to be tested, so that the RRU is to be tested The cell performs interference suppression.
The apparatus of claim 11 wherein said apparatus further comprises:

The notification module is configured to notify the RRU to cancel interference suppression when the difference indicated by the interference suppression result is less than a preset threshold, where the difference is an RTWP after performing interference suppression on the cell to be tested The difference of the RTWP before the interference to the cell to be tested.
An interference suppression device is applied to a remote radio unit RRU, and the device includes:

a receiving module, configured to receive the specified information of the interfering cell sent by the baseband processing unit BBU, where the interfering cell is the BBU, where the number of user terminals in the cell to be tested is less than a first threshold, and the cell to be tested has interference Determined cell;

The interference suppression module is configured to perform interference suppression on the interference cell according to the specified information.
The device according to claim 13, wherein

The device further includes: a sending module, configured to periodically send the dry to the BBU Disturbance suppression result;

The receiving module is further configured to receive the notification sent by the BBU, where the notification is used to indicate that the RRU cancels interference suppression, where the notification is when the difference indicated by the interference suppression result is less than a preset threshold The sent notification is that the difference is the difference between the RTWP after the interference suppression of the interfering cell and the RTWP before the interference to the interfering cell.
An interference suppression device includes:

Obtaining a module, configured to obtain the number of user terminals in the cell to be tested;

The interference suppression module is configured to perform interference suppression on the to-be-tested cell when the quantity is less than the first threshold and the cell to be tested has interference.
The device according to claim 15, wherein

The acquiring module is further configured to periodically acquire an interference suppression result for the cell to be tested; the interference suppression module is further configured to cancel the pair when the difference indicated by the interference suppression result is less than a preset threshold The interference suppression of the interfering cell, where the difference is a difference between an RTWP after interference suppression of the interfering cell and an RTWP before interference to the interfering cell.
A communication system comprising:

The baseband processing unit BBU is configured to acquire the number of user terminals in the cell to be tested, and send the specified information of the cell to be tested to the remote radio unit when the number is less than the first threshold and the cell to be tested has interference. And an interference suppression result obtained by performing interference suppression on the cell to be tested according to the specified information by the RRU;

And the RRU is configured to receive the specified information, and perform interference suppression on the cell to be tested.
The communication system according to claim 17, wherein said BBU is further used Notifying the RRU to cancel interference suppression when the difference indicated by the interference suppression result is less than a preset threshold, where the difference is an RTWP after performing interference suppression on the cell to be tested and The difference between the RTWPs before the cell interference is measured.