CN110602008B

CN110602008B - Method, equipment, device and computer storage medium for suppressing inter-cell interference

Info

Publication number: CN110602008B
Application number: CN201810605847.0A
Authority: CN
Inventors: 王令斌; 吴枫; 刘强
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2018-06-13
Filing date: 2018-06-13
Publication date: 2023-04-07
Anticipated expiration: 2038-06-13
Also published as: CN110602008A; WO2019237801A1

Abstract

The embodiment of the invention provides a method, equipment, a device and a computer storage medium for suppressing inter-cell interference, wherein the method comprises the following steps: performing interference detection on the serving cell according to interference detection rules agreed with N inter-system neighboring cells of the serving cell; then, generating an interference suppression decision according to the interference detection result; the interference suppression decision is to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell; and finally, based on the interference suppression decision, carrying out interference elimination processing.

Description

Method, equipment, device and computer storage medium for suppressing inter-cell interference

Technical Field

Embodiments of the present invention relate to, but not limited to, techniques for suppressing co-channel interference, and in particular, to a method, a device, and an apparatus for suppressing inter-cell interference, and a computer storage medium.

Background

With the continuous development of the 5G network, more and more scenes that the 4G communication system and the 5G communication system are networked simultaneously appear; when the 4G communication system and the 5G communication system are networked simultaneously, the problem of co-channel interference between different systems of the 4G communication system and the 5G communication system is likely to occur; the problem of co-channel interference between different systems of the 4G communication system and the 5G communication system is still urgently needed to be solved at present.

Disclosure of Invention

The embodiment of the invention provides a method, equipment and a device for inhibiting inter-section interference and a computer storage medium, which can solve the problem of co-channel interference between different systems.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

in a first aspect of the embodiments of the present invention, a method for suppressing inter-cell interference is provided in the embodiments of the present invention, and is applied to a base station corresponding to a serving cell, where the method includes:

performing interference detection on the service cell according to interference detection rules agreed with N different system neighboring cells of the service cell; wherein N is greater than or equal to 1;

generating an interference suppression decision according to the interference detection result; the interference suppression decision is to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell;

and performing interference elimination processing based on the interference suppression decision.

In a first aspect of the embodiments of the present invention, an embodiment of the present invention further provides an inter-cell interference suppression apparatus, where the apparatus is located in a base station corresponding to a serving cell, and the apparatus includes a first processor and a first memory configured to store a computer program that is executable on the first processor; wherein the content of the first and second substances,

the first processor is configured to perform any of the above-mentioned steps of the method for inter-cell interference suppression when running the computer program.

In a first aspect of the embodiments of the present invention, an embodiment of the present invention further provides an inter-cell interference suppression apparatus, where the apparatus is located in a base station corresponding to a serving cell, and the apparatus includes a detection module, a generation module, and an interference cancellation module; wherein the content of the first and second substances,

the detection module is used for carrying out interference detection on the service cell according to an interference detection rule agreed with N different system neighbor cells of the service cell; wherein N is greater than or equal to 1;

the generation module is used for generating an interference suppression decision according to the interference detection result; the interference suppression decision is used to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell;

and the interference removing module is used for carrying out interference removing processing based on the interference suppression decision.

In a first aspect of the embodiments of the present invention, an embodiment of the present invention further provides a computer storage medium, which stores a computer program, and is applied to a base station corresponding to a serving cell, where the computer program is executed by a processor to implement any one of the above-mentioned steps of the method for suppressing inter-cell interference.

In a second aspect of the present invention, an embodiment of the present invention provides another method for suppressing inter-cell interference, where the method is applied to a base station corresponding to a neighboring cell of a different system in a serving cell; the method comprises the following steps:

receiving an interference detection request, wherein the interference detection request is used for indicating a time period of sending a service of a cell;

sending a service in a corresponding time period according to the interference detection request;

receiving a first interference suppression indication message or a second interference suppression indication message, wherein the first interference suppression indication message is used for indicating a cell to reconfigure a working frequency band, and the second interference suppression indication message is used for indicating the cell to keep silent at an appointed time or carrying out service joint transmission with the serving cell at the appointed time;

reconfiguring the working frequency band of the cell according to the first interference suppression indication message;

or keeping silence at the appointed time according to the second interference suppression indication message;

or, performing joint transmission of services with the serving cell according to the second interference suppression indication message.

In a second aspect of the embodiments of the present invention, an embodiment of the present invention further provides another inter-cell interference suppression device, where the device is located in a base station corresponding to a heterogeneous system neighboring cell of a serving cell, and the device includes a second processor and a second memory, where the second memory is used to store a computer program that can be run on the second processor; wherein, the first and the second end of the pipe are connected with each other,

the second processor is configured to perform any of the above-mentioned steps of the method for inter-cell interference suppression when running the computer program.

In a second aspect of the embodiments of the present invention, an embodiment of the present invention further provides another apparatus for suppressing inter-cell interference, where the apparatus is located in a base station corresponding to a neighboring cell of a serving cell, and the apparatus includes a first receiving module, a first processing module, a second receiving module, and a second processing module, where,

a first receiving module, configured to receive an interference probe request, where the interference probe request is used to indicate a time period for sending a service in a cell;

the first processing module is used for sending a service in a corresponding time period according to the interference detection request;

a second receiving module, configured to receive a first interference suppression indication message or a second interference suppression indication message, where the first interference suppression indication message is used to indicate a cell to reconfigure a working band, and the second interference suppression indication message is used to indicate the cell to keep silent at an appointed time, or to perform service joint transmission with the serving cell at the appointed time;

a second processing module, configured to reconfigure a working frequency band of a cell according to the first interference suppression indication message; or, according to the second interference suppression indication message, keeping silent at an appointed time; or, performing joint transmission of services with the serving cell according to the second interference suppression indication message.

In a second aspect of the embodiments of the present invention, another computer storage medium is provided, where a computer program is stored on the computer storage medium, and is applied to a base station corresponding to an inter-system neighboring cell of a serving cell, where the computer program is executed by a processor to implement any one of the above-mentioned steps of the method for suppressing inter-cell interference.

The method, the equipment, the device and the computer storage medium for suppressing the inter-cell interference are applied to a service cell, and firstly, the interference detection is carried out on the service cell according to the interference detection rule agreed with N different system adjacent cells of the service cell; wherein N is greater than or equal to 1; then, generating an interference suppression decision according to the interference detection result; the interference suppression decision is to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell; and finally, based on the interference suppression decision, carrying out interference elimination processing. Therefore, after the interference detection is carried out on the service cell with the inter-system neighbor cell, how to reduce the co-channel interference of the inter-system neighbor cell of the service cell to the service cell can be determined according to the interference detection result, and then the interference removal processing is realized.

Another method, device, apparatus, and computer storage medium for suppressing inter-cell interference provided in the embodiments of the present invention are applied to a base station corresponding to an inter-system neighboring cell of a serving cell; firstly, receiving an interference detection request, wherein the interference detection request is used for indicating a time period of sending a service of a cell; then, sending a service in a corresponding time period according to the interference detection request; receiving a first interference suppression indication message or a second interference suppression indication message, wherein the first interference suppression indication message is used for indicating a cell to reconfigure a working frequency band, and the second interference suppression indication message is used for indicating the cell to keep silent at an appointed time or carrying out service joint transmission with the serving cell at the appointed time; finally, according to the first interference suppression indication message, the working frequency band of the cell is reconfigured; or keeping silence at the appointed time according to the second interference suppression indication message; or, performing joint transmission of services with the serving cell according to the second interference suppression indication message. Therefore, the inter-system neighbor cell of the serving cell can send the service according to the interference detection request, so that the interference on the serving cell in the corresponding time period can be measured conveniently; and after corresponding processing is carried out according to the interference suppression indication message, the co-channel interference caused by the inter-system adjacent cell of the service cell to the service cell can be reduced.

Drawings

Fig. 1 is a schematic diagram of a Multi-cell using a Coordinated Multi-Point (CoMP) technique according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the overall bandwidth of a 5G communication system according to an embodiment of the present invention;

fig. 3 is a diagram illustrating coexistence of a 4G cell and a 5G cell in an embodiment of the present invention;

fig. 4 is a first flowchart of a method for inter-cell interference mitigation according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for inter-cell interference mitigation according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an inter-cell interference suppression apparatus according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a hardware structure of an inter-cell interference suppression apparatus according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a structure of another inter-cell interference suppression apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a hardware structure of another inter-cell interference suppression apparatus according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

CoMP transmission and reception technology is a technology for improving cell edge throughput, increasing high-speed data service coverage, and improving system throughput by reducing or eliminating co-channel interference in a Long Term Evolution-Advanced (LTE-a) network; coMP is an application of Multiple Input Multiple Output (MIMO) technology in multiple cells, as shown in fig. 1, cell0 and Cell1 represent two adjacent cells, and they can work together by using CoMP technology.

In the implementation of CoMP technology, joint reception is generally used in the uplink, and uplink signals of the same user are received and processed simultaneously among multiple cells or multiple base stations, thereby obtaining receive diversity gain and power gain; the following two typical techniques may be employed in the downlink: 1) Joint transmission, that is, downlink signals of the same user are sent simultaneously among a plurality of cells or a plurality of base stations; 2) Interference avoidance, namely, when the serving cell sends data, other adjacent cells keep silent (do not send data) in the same time-frequency resource; the two technologies aiming at the downlink can effectively reduce the same frequency interference of the same frequency domain resources of other cells and improve the throughput of edge users.

It can be seen that the CoMP technology can reduce Co-Channel Interference (CCI) between cells through cooperative scheduling or joint processing between multiple cells, improve signal quality of a user, and improve the overall performance of a communication system while improving the performance of an edge user; and the same frequency interference can be effectively eliminated, and the frequency spectrum utilization rate is improved.

The CoMP technology can be regarded as an anti-interference technology applied in the LTE-a network, and belongs to anti-interference technologies in the same system; exemplarily, the serving cell may collect interference signal strength of each neighboring cell in the LTE network through an A3 measurement event reported by a User Equipment (UE), that is, may determine an interference degree of the neighboring cell to the serving cell, and further determine a strong interference cell, and then may perform interference coordination between cells.

Since the CoMP technology belongs to an anti-interference technology in the same system, the problem of co-channel interference between different systems of the 4G communication system and the 5G communication system cannot be solved.

Here, the 5G communication system is a mobile communication system oriented to 2020 and beyond, and is going to be in various fields of society; the 5G communication system adopts a brand-new air interface technology to provide ultra-high-speed service; therefore, the bandwidth of the 5G communication system is much larger than that of the 4G communication system, for example, the bandwidth of the 5G communication system can reach 100M, and the bandwidth of the 4G communication system can only reach 20M at most.

In the case of a 5G communication system using a very large Bandwidth, the 5G protocol proposes a large concept of Bandwidth part (BWP), as shown in fig. 2, where a whole Bandwidth (BW) is divided into several BWPs, the service of a UE can only be performed in the activated BWPs, and a UE can only activate one BWP at the same time.

The frequency points used by the 5G network and the 4G network can be overlapped, for example, the frequency points of sub1GHz, 3.5GHz and the like; meanwhile, in the 5G network commercialization process, the 4G network and the 5G network can provide services for the terminal at the same time, and the number of antennas in the 5G network far exceeds that of the 4G network, so the 5G network may generate serious interference on 4G services; as shown in fig. 3, the NR cell is a 5G cell, the LTE cell is a 4G cell, the blocks filled with oblique lines represent the operating frequency bands of the cells, and a plurality of 5G cells may cause interference to the services of the adjacent 4G cells.

The premise for solving the same frequency interference problem is to measure and determine an interference source, however, for the same frequency interference problem between different systems of a 4G communication system and a 5G communication system, the measurement and determination of the interference source is lacked at present; specifically, in the initial stage of the layout of the 5G base station, hot spot coverage is generally mainly used, at this time, an LTE single-mode mobile phone is still mainly used in an existing network, the LTE single-mode mobile phone cannot complete measurement of a New Radio (NR) cell of the 5G network, and even if a dual-mode mobile phone capable of using a 4G network and a 5G network exists, measurement of an NR neighboring cell cannot be accurately obtained because a measurement sample is too few in an existing network stage; therefore, the LTE cell cannot collect the signal quality of the NR neighbor cell through the standard measurement of the UE (especially, the 4G UE of the low protocol version), and thus cannot determine the source of the strong interference; further, interference coordination processing cannot be performed between the 4G cell and the 5G cell. However, the problem of co-channel interference between different systems of the 4G communication system and the 5G communication system still needs to be solved urgently, otherwise, the development pace of the 5G network is greatly influenced.

The following specific examples are proposed for the above problems.

First embodiment

The first embodiment of the present invention describes a method for suppressing inter-cell interference, which can be used to solve the co-frequency interference between a serving cell and an inter-system neighboring cell of the serving cell, where a communication system of the inter-system neighboring cell is different from a communication system of the serving cell; exemplarily, when the serving cell is a Long Term Evolution (LTE) cell, an NR cell that is an inter-system neighbor cell of the serving cell; and when the service cell is an NR cell, the inter-system adjacent cell of the service cell is an LTE cell.

Fig. 4 is a first flowchart of a method for suppressing inter-cell interference according to an embodiment of the present invention, as shown in fig. 4, the process may include:

step 401: a base station corresponding to a serving cell and N different system neighbor cells of the serving cell agree on an interference detection rule, and interference detection is performed on the serving cell according to the agreed interference detection rule; wherein N is greater than or equal to 1.

Here, the working frequency bands of the serving cell and each of the N inter-system neighboring cells of the serving cell may overlap, and specifically, the working frequency bands of each of the N inter-system neighboring cells of the serving cell and the serving cell may partially overlap (they are not completely the same), or may completely overlap (they are completely the same); when the working frequency bands of the serving cell and each of the N inter-system neighbor cells of the serving cell overlap, it is described that the problem of co-channel interference may occur in the serving cell and each of the N inter-system neighbor cells of the serving cell.

Illustratively, the agreed interference detection rules include:

when i is respectively 1 to N, a base station corresponding to a service cell sends an ith interference detection request to a base station corresponding to an ith cell in the N inter-system adjacent cells, wherein the ith interference detection request is used for indicating a time period for sending a service of the ith cell in the N inter-system adjacent cells; and performing interference detection on the service cell in the time period of sending the service of each cell in the N inter-system adjacent cells.

Here, the type of the traffic transmitted by the ith cell in the N inter-system neighboring cells is not limited, and the time period for transmitting the traffic by the ith cell in the N inter-system neighboring cells may include: the starting time point of the service transmission of the ith cell in the N inter-system neighbor cells and the duration of the service transmission of the ith cell in the N inter-system neighbor cells.

And after receiving the ith interference detection request, the base station corresponding to the ith cell in the N inter-system adjacent cells transmits the service of the ith cell in the N inter-system adjacent cells in the time period for transmitting the service indicated by the ith interference detection request.

For example, if cell0 is a serving cell and cell1 is an inter-system neighboring cell of the serving cell, the base station corresponding to cell0 may send an interference detection request to the base station corresponding to cell1 to indicate the start time and duration of the service transmission of cell 1.

Further, when N is greater than or equal to 2, there is no overlap between time periods for sending services of any two cells in the N inter-system neighboring cells; that is to say, the time periods of service transmission by the cells indicated by the 1 st to nth interference probe requests do not overlap with each other, so that the service transmission by the different system neighboring cells of the serving cell is performed in different time periods, which is convenient for detecting the interference degree caused by the different system neighboring cells of the serving cell to the serving cell.

For example, if the cell2 is a serving cell, and the cells 3 and 4 are two inter-system neighboring cells of the serving cell, then according to the interference detection request sent by the base station corresponding to the cell2 to the base station corresponding to the cell3, the start time and duration of the service sending of the cell3 are respectively: 1, 00 for 1 minute; according to the interference detection request sent from the base station corresponding to the cell2 to the base station corresponding to the cell4, the initial time and duration of the service sending of the cell4 are respectively: 1, 05 for 1 minute; it can be seen that the time period for sending the traffic of the cell3 and the time period for sending the traffic of the cell4 do not overlap with each other.

Further, when N is greater than or equal to 2, the ith interference probe request is further used for indicating a time period for keeping silent of an ith cell in the N inter-system neighbor cells; here, keeping silent may refer to stopping sending traffic;

and after receiving the ith interference detection request, the base station corresponding to the ith cell in the N inter-system adjacent cells keeps silent in the period of keeping silent indicated by the ith interference detection request.

Here, when i is 1 to N, respectively, the silence maintaining period of the ith cell in the N inter-system neighbor cells includes: the time period for sending the service of other cells in the N inter-system neighbor cells; that is to say, when the other cells in the N inter-system neighboring cells send services, the ith cell in the N inter-system neighboring cells keeps silent, and the other cells in the N inter-system neighboring cells are: and all other cells except the ith cell in the N inter-system neighbor cells.

For example, if cell5 is a serving cell, and cell6 and cell7 are two inter-system neighboring cells of the serving cell, then according to an interference detection request sent from a base station corresponding to cell5 to a base station corresponding to cell6, the start time and duration of a service sent by cell6 are respectively: 2, starting at 00 for 1 minute; the starting time and duration of the silence keeping of cell6 are respectively: 2, start, for 1 minute; according to the interference detection request sent from the base station corresponding to the cell5 to the base station corresponding to the cell7, the initial time and duration of the service sent by the cell7 are respectively as follows: 2, starting at 05 and continuing for 1 minute; the starting time and duration of the silence keeping of cell7 are respectively: 2, 00 for 1 minute.

It can be understood that, when N is greater than or equal to 3, each interference probe request sent by the base station corresponding to the serving cell may indicate that multiple inter-system neighboring cells keep silent in the same time period, for example, when the serving cell has 3 inter-system neighboring cells, the starting time and the duration of the service transmission of the 1 st inter-system neighboring cell of the serving cell are: 1, starting at point 02 and lasting for 1 minute, wherein the silence keeping time periods of a2 nd inter-system neighbor cell and a3 rd inter-system neighbor cell of a serving cell both comprise: 1.

It can be seen that, when i is 1 to N, and the ith cell in the N inter-system neighbor cells sends a service, other cells in the N inter-system neighbor cells all keep silent; therefore, each inter-system neighbor cell of the serving cell sends services in different time periods, and the interference degree of each inter-system neighbor cell of the serving cell to the serving cell is convenient to detect respectively.

It can be understood that, because the base station corresponding to the serving cell sends the interference detection request to each inter-system neighboring cell, the base station corresponding to the serving cell may determine the time period for sending the service of each cell in the N inter-system neighboring cells according to the sent 1 st interference detection request to the nth interference detection request; therefore, the interference detection of the service cell can be realized in the time period of sending the service of each cell in the N different-system adjacent cells.

For the embodiment of performing interference detection on the serving cell, for example, a base station corresponding to the serving cell may detect a disturbed degree value, where the disturbed degree value is used to indicate a degree of interference suffered by the serving cell; here, the larger the interference level value is, the more serious the interference level received by the serving cell is.

As for the method for detecting the disturbed degree value, for example, the base station corresponding to the serving cell may obtain a Noise Interference power (NI) measurement value corresponding to the serving cell through detection, or may receive a measurement event reported by the UE in the serving cell, and then may determine the disturbed degree value according to the obtained NI measurement value or the measurement event; in one example, the serving cell may be an LTE cell.

Here, after the NI measurement value is acquired, the NI measurement value may be directly determined as a disturbed degree value; it can be understood that, since the disturbed degree value can be obtained in the time period of sending the service in each cell of the N inter-system neighboring cells, the N disturbed degree values can be obtained.

For example, the serving cell is denoted as LTE0, the serving cell has 3 inter-system neighboring cells, which are denoted as NR0, NR1, and NR2, respectively, and then the NI measurement value measured when the cell NR0 transmits a service may be NI0, and so on, the NI measurement value measured when the cell NR1 transmits a service may be NI1, and the NI measurement value measured when the cell NR2 transmits a service may be NI2.

Further, the base station corresponding to the serving cell may determine the disturbed degree value according to a measurement event reported by the UE before the service is sent by the ith cell in the N inter-system neighboring cells and a measurement event reported by the UE when the service is sent by the ith cell in the N inter-system neighboring cells; here, the manner of determining the disturbed degree value according to the measurement event reported by the UE may be preset.

When the serving cell is an LTE cell, the measurement event reported by the UE may be an event a; the a event may include at least one of the following events:

event A1: indicating that the serving cell signal quality is above a certain threshold; when the event meeting the condition is reported, the evolved node B (eNodeB) can stop the measurement of the pilot frequency/pilot system;

an event A2: indicating that the serving cell signal quality is below a certain threshold; when the event meeting the condition is reported, the evolved node B can start the measurement of the pilot frequency/the pilot system;

event A3: the quality of the signal of the same-frequency adjacent cell is higher than that of the service cell, and when the event meeting the condition is reported, the evolved node B can start the same-frequency switching;

event A4: the quality of the signal of the pilot frequency adjacent cell is higher than a certain threshold, and when the event meeting the condition is reported, the evolved node B can start pilot frequency switching;

event A5: indicating that the signal quality of the serving cell is below a certain threshold and the signal quality of the neighbor cell is above a certain threshold.

It can be understood that, according to the above measurement events, the LTE serving cell may collect signal quality of neighboring cells in the same system through feedback of the UE, for example, the signal quality of the LTE neighboring cells with the same frequency may be collected through an A3 event.

For example, if the UE reports an A1 event before sending a service in the ith cell of the N inter-system neighboring cells, and the UE reports the A1 event when sending a service in the ith cell of the N inter-system neighboring cells, it may be considered that the degree of interference received by the serving cell is low, and the determined interference degree value is small; if the UE reports the event A1 before the service is sent by the ith cell in the N inter-system neighboring cells, and the UE reports the event A2 when the service is sent by the ith cell in the N inter-system neighboring cells, it may be considered that the degree of interference received by the serving cell is higher, and the determined interference degree value is larger.

Step 402: a base station corresponding to a serving cell generates an interference suppression decision according to an interference detection result; the interference suppression decision is used to represent: and reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell.

The interference detection result may be, for example, the disturbed degree value described above.

For the implementation manner of generating the interference suppression decision according to the interference detection result, in an example, the base station corresponding to the serving cell may determine, according to the interference detection result, a cell that needs to be interference suppressed among N inter-system neighboring cells of the serving cell; and generating an interference suppression decision aiming at the cell needing interference suppression.

Exemplarily, when the disturbed degree value is greater than the preset threshold, in N inter-system neighboring cells of the serving cell, the cell that sends the service when detecting the disturbed degree value is determined as: a cell requiring interference suppression; when the disturbed degree value is less than or equal to the preset threshold, the inter-system neighboring cell corresponding to the disturbed degree value less than or equal to the preset threshold may be ignored, that is, the inter-system neighboring cell is ignored.

That is, in one embodiment, for inter-system neighboring cells having co-channel interference with a serving cell, not all of them need to be interference suppressed; for the inter-system adjacent cell corresponding to the lower disturbed degree value, interference suppression is not needed; interference suppression is only needed for the inter-system adjacent cells corresponding to the higher disturbed degree value, so that the time-frequency resources of each inter-system adjacent cell can be utilized to the maximum extent, the bandwidth utilization rate of the inter-system adjacent cells can be improved, and the throughput of a user and the frequency spectrum utilization rate of the whole network can be improved.

Step 403: and the base station corresponding to the service cell carries out interference elimination processing based on the interference suppression decision.

For the implementation of this step, in an example, a base station corresponding to a serving cell first detects a total traffic volume of each UE in the serving cell, and when the total traffic volume of each UE in the serving cell is greater than a traffic volume threshold, sends a first interference suppression indication message to a base station corresponding to at least one cell in cells that need interference suppression, where the first interference suppression indication message is used to indicate the corresponding cell to reconfigure an operating frequency band; illustratively, the reconfigured operating band needs to be non-overlapping with the operating band of the serving cell.

After receiving a first interference suppression indication message, a base station corresponding to a different-system neighboring cell of a serving cell may reconfigure a working frequency band of the cell according to the first interference suppression indication message; illustratively, when the inter-system neighboring cell of the serving cell is an NR cell, the inter-system neighboring cell of the serving cell may reconfigure BWP according to the first interference suppression indication message.

Therefore, the same frequency interference of the corresponding different system neighbor cells to the service cell can be eliminated by reconfiguring the working frequency band of the different system neighbor cells; when the inter-system adjacent cell of the service cell is an NR cell, the broadband characteristic of the NR cell can be utilized, and the BWP is reconfigured, so that the generation of interference is effectively avoided; by reconfiguring the working frequency band of the cell, the bandwidth utilization rate of the inter-system adjacent cell can be improved, and the throughput and the whole network spectrum utilization rate of the user can be improved.

When the total traffic of each UE in the serving cell is less than or equal to a traffic threshold, sending a second interference suppression indication message to a base station corresponding to at least one cell in the cells needing interference suppression; the second interference suppression indication message is used for indicating the corresponding cell to keep silent at the appointed time, or performing service joint transmission with the serving cell at the appointed time.

Further, after the base station corresponding to the inter-system neighboring cell of the serving cell successfully reconfigures the working frequency band of the cell, sending a confirmation message that the reconfiguration of the working frequency band is successful to the serving cell; and after the working frequency band of the cell is failed to be reconfigured, sending a confirmation message of failure in reconfiguring the working frequency band to the serving cell.

And after receiving the confirmation message of successful reconfiguration of the working frequency band, the base station corresponding to the service cell does not process the cell which sends the confirmation message of successful reconfiguration of the working frequency band.

And when the base station corresponding to the serving cell receives the confirmation message of failure of the reconfiguration of the working frequency band of the inter-system adjacent cell of the serving cell, sending a second interference suppression indication message to the base station corresponding to at least one cell in the cells needing interference suppression.

After receiving the second interference suppression indication message, the base station corresponding to the inter-system neighboring cell of the serving cell may keep silent at an appointed time according to the second interference suppression indication message,

In actual implementation, the total traffic of each UE in the serving cell may be determined by the amount of uplink data to be sent, which is indicated by a Buffer Status Report (BSR) of each UE in the serving cell.

Further, if the service cell has a system-shared neighboring cell and the working frequency bands of the system-shared neighboring cells of the service cell and the service cell overlap, a cooperative working mode of the service cell and the system-shared neighboring cell of the service cell can be determined, where the cooperative working mode is a working mode that reduces co-channel interference between the service cell and the system-shared neighboring cell of the service cell; for example, when the serving cell is an LTE cell, the cooperative working manner of the serving cell and the homogeneous neighboring cell of the serving cell may be determined according to the CoMP technology.

After the service cell adopts the cooperative working mode, the service cell appoints an interference detection rule with N different system adjacent cells of the service cell; the agreed interference detection rules have already been explained and will not be described in detail here.

Here, the communication system of the neighboring cell of the same system is the same as the communication system of the serving cell; exemplarily, when the serving cell is an LTE cell, an LTE cell that is a neighbor cell of the serving cell and is in the same system; and when the service cell is an NR cell, the adjacent cell of the same system of the service cell is the NR cell.

If the serving cell has the same-system neighboring cell and the working frequency bands of the serving cell and the same-system neighboring cell of the serving cell do not overlap, the implementation manners described in steps 401 to 403 may be adopted for the same-system neighboring cells of the serving cell and the serving cell, respectively, to perform inter-cell interference suppression.

Further, when the working frequency band of the serving cell is updated, the updated working frequency band of the serving cell is notified to N inter-system neighboring cells of the serving cell. When the working frequency band of the inter-system adjacent cell of the service cell is updated, informing the updated working frequency band of the inter-system adjacent cell of the service cell to the service cell; in this way, when the base station corresponding to the serving cell determines that the operating frequency bands of the serving cell and the inter-system neighboring cell of the serving cell overlap, the embodiments described in steps 401 to 403 may be adopted again to perform inter-cell interference suppression.

Second embodiment

The method for suppressing inter-cell interference provided in the foregoing embodiment of the present invention is further illustrated.

In the second embodiment of the invention, a service cell is an LTE cell, and a different-system adjacent cell of the service cell is an NR cell; fig. 5 is a second flowchart of a method for suppressing inter-cell interference according to an embodiment of the present invention, and as shown in fig. 5, the process may include:

step 501: and establishing an interference coordination group.

Here, according to the network planning of the LTE cell and the NR cell, the neighboring cell relationship between the LTE cell and the NR neighboring cell is determined; for example, an LTE cell may be located at the center of multiple NR cells, and any two NR cells may be in a neighboring cell relationship with each other.

For example, the interference coordination group may include 1 LTE cell and m NR neighboring cells of the LTE cell, where m is an integer greater than or equal to 1.

Here, the LTE cell and each NR neighbor cell may notify the other party of the working frequency band used by itself through data interaction; when the working frequency band of the LTE cell or the NR neighboring cell is updated (e.g., frequency point or bandwidth update), the updated working frequency bands need to be notified each other in time.

Exemplarily, the LTE cell may also screen out an NR neighboring cell whose working frequency band overlaps with the working frequency band of the LTE cell, and use the screened NR neighboring cell as a potential interference cell; after the potential interference cells are screened out, the screened potential interference cells can be divided into two groups of partially overlapped and fully overlapped, wherein the working frequency bands of the NR cells in the partially overlapped group are partially overlapped (not completely same) with the working frequency bands of the service cells (LTE cells), and the working frequency bands of the NR cells in the fully overlapped group are fully overlapped (completely same) with the working frequency bands of the service cells (LTE cells);

further, a1 st interference coordination group can be constructed by using a group of partially overlapped NR cells and LTE cells; constructing a2 nd interference coordination group by using the NR cells and the LTE cells of the completely overlapped group; then, interference suppression among cells can be realized according to subsequent steps aiming at the 1 st interference coordination group and the 2 nd interference coordination group respectively; that is, the co-channel interference between the LTE cell and the NR neighboring cell in each interference coordination group is suppressed based on each interference coordination group.

Step 502: and the LTE cell and the NR adjacent cell agree on an interference detection rule.

For each NR cell in each interference coordination group, the LTE cell may agree on a period of interference sounding (including a period of transmitting traffic and a period of keeping silent); for example, 3 NR cells in an interfering system group are all potential interfering cells, and these 3 NR cells are denoted as NR0, NR1 and NR2, and in practical implementation, 3 non-overlapping time periods may be set: t0, T1 and T2, where during the T0 time period NR0 transmits traffic and NR1 and NR2 remain silent (implemented only in the operating band of LTE), during the T1 time period and T2 time period, it can be set how 3 NR cells operate (including when to transmit traffic and when to remain silent) in a similar manner as during the T0 time period.

Step 503: and the LTE cell sends an interference detection request to each NR adjacent cell.

In actual implementation, the base station corresponding to the LTE cell may broadcast the interference detection request to the base station corresponding to each NR neighboring cell, or may send the corresponding interference detection request to the base station corresponding to each NR neighboring cell through the X2 or inter-IP private message.

The implementation manner of step 503 has been described in detail in the foregoing embodiments of the present invention, and is not described herein again.

Step 504: and the NR neighboring cell works according to the interference detection request.

Specifically, each NR neighboring cell that receives the interference detection request can ensure service transmission in the service transmission time period according to the content indicated by the interference detection request; during the period of keeping silent, no traffic is guaranteed to be sent.

The implementation manner of step 504 has been described in detail in the foregoing embodiments of the present invention, and is not described here again.

Step 505: and the LTE cell monitors the disturbed degree value of the cell during the period of sending the service by the NR adjacent cell.

Here, after the interference detection is started (any NR neighboring cell starts to send a service), the LTE cell may monitor the interfered condition of the cell in real time during the period in which the NR neighboring cell sends the service; here, the disturbed condition of the cell can be represented by a disturbed degree value; thus, the LTE cell can collect the channel quality and interference level of the surrounding NR neighbor cells.

The implementation of step 505 has been described in detail in the foregoing embodiments of the present invention, and is not described here again.

According to steps 502 to 505, the embodiment of the present invention may establish an interaction rule (i.e. an interference detection rule) between the LTE cell and the NR neighboring cell in the interference coordination group, so that the NR neighboring cell transmits a service at a specific time when the LTE cell starts detection, and completes interference detection in sequence in cooperation with the LTE cell.

Step 506: for each NR adjacent region, judging whether the disturbed degree value is greater than a preset threshold, if so, executing a step 507; if the disturbed degree value is less than or equal to the preset threshold, the NR neighboring cell corresponding to the disturbed degree value less than or equal to the preset threshold may be ignored, that is, the flow may be directly ended for the NR neighboring cell corresponding to the disturbed degree value less than or equal to the preset threshold.

In an embodiment, after each NR neighbor cell transmits a service, an LTE cell may determine that an interference detection process is finished, at this time, rank the acquired disturbed degree values, compare the highest disturbed degree value of the acquired disturbed degree values with a preset threshold, if the highest disturbed degree value of the acquired disturbed degree values is greater than the preset threshold, use the corresponding NR cell as an interference NR neighbor cell, and continue to perform interference cancellation processing for the interference NR neighbor cell, at this time, execute step 507; if the highest disturbed degree value in the obtained disturbed degree values is smaller than or equal to the preset threshold, interference suppression processing is not performed on each NR neighboring cell, and the process can be directly ended.

It should be noted that the interference detection result may be applied to both the CoMP technology and other technologies, for example, the LTE cell may utilize the obtained disturbed degree value to implement adaptive modulation and coding of the LTE cell.

Step 507: whether the total traffic of each UE in the LTE cell is greater than a traffic threshold or not, if so, executing step 508; if the total traffic of the UEs in the LTE cell is less than or equal to the traffic threshold, step 509 is performed.

Step 508: the LTE cell informs the NR neighbor cell of reconfiguring the working frequency band;

in actual implementation, the base station corresponding to the LTE cell may send a first interference suppression indication message to the base station corresponding to the NR neighboring cell to indicate the NR neighboring cell to reconfigure the operating frequency band.

Step 509: and the LTE cell informs the NR neighboring cell according to the self scheduling condition to eliminate the interference in real time.

That is to say, the base station corresponding to the LTE cell may decide to select the interference cancellation processing method according to the scheduling condition of the base station.

In actual implementation, the base station corresponding to the LTE cell may send a second interference suppression indication message to the base station corresponding to the NR neighboring cell to indicate that the NR neighboring cell keeps silent or performs joint transmission of services with the LTE cell.

Further, the second interference suppression indication message also carries a specific time-frequency domain position sent by the LTE cell resource (i.e., a time-frequency resource for service processing by the LTE cell), and the NR neighboring cell can perform muting processing according to the specific time-frequency domain position sent by the LTE cell resource; or, the NR neighboring cell may determine whether to perform data joint transmission according to its slot configuration and the specific time-frequency domain position of LTE cell resource transmission.

It should be noted that, when the base station corresponding to the LTE cell receives the confirmation message that the reconfiguration of the operating frequency band of the NR neighboring cell fails, the processing may also be performed according to step 509 (not shown in fig. 5).

In an embodiment, after step 508 or 509, the flow may end.

As can be seen, according to steps 506 to 509, the lte cell may decide to choose to use interference avoidance techniques; specifically, interference avoidance techniques used for LTE cell decision making include, and are not limited to: interference coordination (realized by keeping silence in an NR neighboring cell when an LTE cell transmits service), joint transmission and a method for reconfiguring an NR cell working frequency band; the interference avoidance techniques such as interference coordination and joint transmission described above can be regarded as extended application of CoMP techniques, that is, co-channel interference between a 4G communication system and a 5G communication system can be reduced by applying the CoMP techniques in an extended manner

In an embodiment, after the base station corresponding to the NR neighboring cell receives the second interference suppression indication message, interference cancellation may be implemented in cooperation with the LTE cell to complete interference avoidance.

In one example, the second interference suppression indication message carries a cooperation request, where the cooperation request includes LTE cell pre-estimated service information; the NR neighboring cell can estimate service information according to the LTE cell, estimate service duration and keep silence at appointed time; in another example, the second interference suppression indication message carries a joint transmission request, where the joint transmission request includes service data to be transmitted by the LTE cell, so that the NR neighboring cell performs joint transmission of the service data with the LTE cell at an appointed time.

Further, the interference detection mechanism may be started periodically, and after the interference detection mechanism is started each time, the steps 502 to 508 are repeatedly executed.

Further, if a plurality of LTE cells exist in the interference coordination group (that is, when the same-system neighbor cells of the LTE cells exist), interference detection rules need to be communicated in advance between the LTE cells, and then NR neighbor cells are measured to avoid interference detection conflicts; the specific implementation manner of the method has been described in the foregoing embodiments of the present invention, and is not described herein again.

The embodiment of the invention provides a scheme for detecting same frequency interference, eliminating same frequency interference and improving the bandwidth utilization rate of edge users by utilizing a coordinated multi-point technology under the condition that the interference cannot be detected by UE (user equipment) in the current network when a 4G communication system and a 5G communication system are jointly networked; during specific implementation, an interference coordination group is established, and the 4G base station in the interference coordination group realizes interference identification and interaction adjustment of the 4G base station on the adjacent cell of the 5G base station with same frequency interference by appointing an interference detection rule with the adjacent cell of the 5G base station, so that the aims of effectively using a COMP technology and completing interference detection and elimination during common networking of LTE and NR are fulfilled; therefore, the application space of the CoMP technology is greatly expanded, the interference of the adjacent cells of different systems to the service cell can be effectively avoided, the interference cooperation between the 4G communication system and the 5G communication system is supported, and the co-channel interference level between different systems is reduced.

Third embodiment

In the third embodiment of the invention, a serving Cell is an LTE Cell, and the LTE Cell is marked as Cell-LTE-0; 3 NR adjacent regions of a serving Cell are respectively marked as Cell-NR-0, cell-NR-1 and Cell-NR-2; the working frequency bands of the Cell-LTE-0 and the Cell-NR-1 are overlapped, the working frequency bands of the Cell-LTE-0 and the Cell-NR-2 are overlapped, and the working frequency bands of the Cell-LTE-0 and the Cell-NR-3 are not overlapped.

The following preset rules can be configured in the background: the starting time of the transmission traffic of Cell-NR-0, cell-NR-1 and Cell-NR-2 is 1.

In the third embodiment of the present invention, explanation is made below by way of three specific examples.

Specific example 1:

according to planning and adjacent area configuration, cell-LTE-0, cell-NR-1 and Cell-NR-2 can form an interference cooperation group; at this point, in one example, an interference detection timer may be started; for example, in a base station corresponding to Cell-LTE-0, an interference detection timer is started, which is used for determining a period of time during which an NR neighbor Cell transmits traffic or keeps silent based on an agreed interference detection rule.

In the interference cooperation group, cell-LTE-0 sends the working frequency bands of the Cell-NR-0, the Cell-NR-1 and the Cell-NR-2 respectively in a notification mode.

The Cell-NR-0 stores the received working frequency band of the Cell-LTE-0 and replies the working frequency band of the Cell-LTE-0; the Cell-NR-1 stores the received working frequency band of the Cell-LTE-0 and replies the working frequency band of the Cell-LTE-0; and the Cell-NR-2 stores the received working frequency band of the Cell-LTE-0 and replies the working frequency band of the Cell-LTE-0.

And after receiving the response of the Cell-NR-0, the Cell-NR-1 and the Cell-NR-2, the Cell-LTE-0 respectively stores the working frequency bands of the Cell-NR-0, the Cell-NR-1 and the Cell-NR-2.

The Cell-LTE-0 screens out Cell-NR-1 and Cell-NR-2 with bandwidth overlapping with the Cell-LTE-0, and the Cell-NR-1 and the Cell-NR-2 are used as candidate interference cells; cell-LTE-0 establishes an index table for Cell-NR-1 and Cell-NR-2 candidate interfering cells, and in the index table, cell-NR-1 and Cell-NR-2 are named as NR1 and NR2 respectively.

Cell-LTE-0 appoints an interference detection rule with Cell-NR-1 and Cell-NR-2 respectively according to the rule configured in the background; in specific implementation, the Cell-LTE-0 sends a1 st interference detection request to the Cell-NR-1, and the 1 st interference detection request indicates that: cell-NR-1 transmits traffic from 100 to 1; cell-LTE-0 sends a2 nd interference detection request to Cell-NR-2, wherein the 2 nd interference detection request indicates that: cell-NR-2 keeps silent from 1.

After receiving the 1 st interference detection request, cell-NR-1 stores the 1 st interference detection request and carries out scheduling adjustment according to the 1 st interference detection request; and after receiving the 2 nd interference detection request, cell-NR-2 stores the 2 nd interference detection request and carries out scheduling adjustment according to the 2 nd interference detection request.

Specific example 2:

when the current time reaches 1; the NR Cell-NR-2 is scheduled to remain silent at 1.

When the current time reaches 1; the NR Cell-NR-1 may or may not end the service; and the NR Cell-NR-2 finishes the silence and carries out normal service scheduling.

When the current time reaches 1; the NR Cell-NR-2 has scheduling service in a 1.

When the current time reaches 1; the NR Cell-NR-1 finishes the silence and carries out normal service scheduling; the NR Cell-NR-2 may or may not end the service.

Specific example 3:

in Cell-LTE-0, comparing NI1 and NI2 with a preset threshold respectively, and finding that NI2 exceeds the preset threshold and NI1 does not exceed the preset threshold, so that when the NR Cell-NR-2 corresponding to NI2 sends a service, interference exists on a base station corresponding to Cell-LTE-0.

Cell-LTE-0 judges whether the total traffic of the UE in the Cell-LTE-0 is greater than a traffic threshold, and if the total traffic of the UE in the Cell-LTE-0 is greater than the traffic threshold, a notice of reconfiguring BPW is sent to Cell-NR-2; after receiving the notice of the reconfiguration BPW, cell-NR-2 determines the adjustment feasibility of the reconfiguration BPW; and if the BPW can be reconfigured, replying an acknowledgement message that the reconfiguration of the working frequency band is successful to the Cell-LTE-0, and carrying out the next transmission time interval. (Transmission Time Interval, TTI) is validated; and if the BPW cannot be reconfigured, replying a confirmation message of failure in reconfiguring the working frequency band to the Cell-LTE-0.

If the Cell-LTE-0 receives the confirmation message that the reconfiguration of the operating frequency band of the Cell-NR-2 is successful, the interference detection timer may be restarted, and then the process is ended.

If the total traffic of the UE in the Cell-LTE-0 is less than or equal to the traffic threshold, or the Cell-LTE-0 receives a confirmation message that the reconfiguration of the operating frequency band of the Cell-NR-2 fails, the Cell-NR-2 neighboring Cell is notified according to the scheduling condition in the Cell-LTE-0 to perform real-time interference cancellation, and the specific implementation manner of the method is described in step 509, which is not described herein again.

If Cell-NR-2 receives the second interference suppression indication message of the UE, it may operate according to the content indicated by the second interference suppression indication message, and a specific implementation manner thereof has been described in the foregoing embodiments, and is not described herein again.

Fourth embodiment

In a fourth embodiment of the present invention, an implementation manner of the inter-cell interference suppression method is described from the perspective of the base station corresponding to the serving cell on the basis of the foregoing embodiments of the present invention.

The method for suppressing inter-cell interference provided by the embodiment of the present invention is applied to a base station corresponding to a serving cell, and the method may include:

generating an interference suppression decision according to the interference detection result; the interference suppression decision is used to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell;

In one embodiment, the agreed interference detection rules include:

when i is from 1 to N, sending an ith interference detection request to a base station corresponding to an ith cell in the N inter-system neighbor cells, wherein the ith interference detection request is used for indicating a time period for sending a service of the ith cell in the N inter-system neighbor cells;

and performing interference detection on the service cell in the time period of sending the service in the inter-system neighbor cell.

In an embodiment, when N is greater than or equal to 2, there is no overlap between time periods for sending services of any two cells in the N inter-system neighboring cells.

In an embodiment, when N is greater than or equal to 2, the ith interference probe request is further used to indicate a time period for keeping silent of an ith cell in the N inter-system neighboring cells; the silence keeping time period of the ith cell in the N inter-system neighbor cells comprises: and the time periods of the service sending of other cells in the N inter-system neighbor cells.

In an embodiment, the performing interference detection on the serving cell includes: and detecting a disturbed degree value, wherein the disturbed degree value is used for representing the degree of interference suffered by the serving cell.

In one embodiment, the detecting the disturbed degree value includes:

and obtaining an NI measurement value corresponding to the serving cell or a measurement event reported by UE in the serving cell, and determining a disturbed degree value according to the obtained NI measurement value or the measurement event.

In one embodiment, the generating an interference suppression decision according to the interference detection result includes:

according to the interference detection result, determining a cell needing interference suppression in N inter-system neighbor cells of the service cell; and generating an interference suppression decision aiming at the cell needing interference suppression.

In an embodiment, the performing interference detection on the serving cell includes: detecting a disturbed degree value, wherein the disturbed degree value is used for representing the degree of interference suffered by the serving cell;

correspondingly, the determining, according to the interference detection result, a cell to be interference suppressed from among N inter-system neighboring cells of the serving cell includes:

when the disturbed degree value is larger than a preset threshold, determining a cell which sends a service when the disturbed degree value is detected as follows in N inter-system adjacent cells of the service cell: a cell requiring interference suppression.

In an embodiment, the performing, based on the interference suppression decision, interference removal processing includes:

when the total traffic of each UE in a serving cell is greater than a traffic threshold, sending a first interference suppression indication message to a base station corresponding to at least one cell in the cells needing interference suppression, wherein the first interference suppression indication message is used for indicating the corresponding cell to reconfigure a working frequency band;

when the total traffic of each UE in the serving cell is less than or equal to a traffic threshold, or when the serving cell receives a confirmation message that the reconfiguration of a working frequency band of an inter-system adjacent cell of the serving cell fails, sending a second interference suppression indication message to a base station corresponding to at least one cell in the cells needing interference suppression; the second interference suppression indication message is used for indicating the corresponding cell to keep silent at the appointed time, or performing service joint transmission with the serving cell at the appointed time.

In one embodiment, when the working frequency bands of the serving cell and the same-system neighboring cell of the serving cell overlap, determining a cooperative working mode of the serving cell and the same-system neighboring cell of the serving cell, where the cooperative working mode is a working mode that reduces co-channel interference between the serving cell and the same-system neighboring cell of the serving cell; after the service cell adopts the cooperative working mode, the service cell agrees with interference detection rules with N different system adjacent cells of the service cell.

In an embodiment, when the serving cell is an LTE cell, an inter-system neighboring cell of the serving cell is an NR cell; and when the service cell is an NR cell, the inter-system adjacent cell of the service cell is an LTE cell.

In an embodiment, when the working frequency band of the serving cell is updated, the updated working frequency band of the serving cell is notified to the base stations corresponding to N inter-system neighboring cells of the serving cell.

Fifth embodiment

In a fifth embodiment of the present invention, based on the foregoing embodiment of the present invention, an implementation manner of the inter-cell interference suppression method is described from the perspective of a base station corresponding to a different system neighboring cell of a serving cell.

The method for suppressing the inter-cell interference provided by the embodiment of the invention is applied to a base station corresponding to a different system adjacent cell of a service cell; the method comprises the following steps:

receiving a first interference suppression indication message or a second interference suppression indication message, wherein the first interference suppression indication message is used for indicating a cell to reconfigure a working frequency band, and the second interference suppression indication message is used for indicating the cell to keep silent at an appointed time or to carry out service joint transmission with the serving cell at the appointed time;

In an embodiment, the interference probe request is further used to indicate a period of time for a cell to remain silent;

accordingly, the method further comprises: and keeping silent in a corresponding time period according to the interference detection request.

In an embodiment, after the operating frequency band of the cell is reconfigured successfully, a confirmation message that the operating frequency band is reconfigured successfully is sent to the serving cell; and after the working frequency band of the cell is reconfigured unsuccessfully, sending a confirmation message of failure of reconfiguring the working frequency band to the service cell.

In an embodiment, when the working frequency band of the inter-system neighboring cell of the serving cell is updated, the updated working frequency band of the inter-system neighboring cell of the serving cell is notified to the serving cell.

Sixth embodiment

On the basis of the inter-cell interference suppression method provided in the foregoing embodiment, a sixth embodiment of the present invention provides an inter-cell interference suppression apparatus, which is applied to a base station corresponding to a serving cell.

Fig. 6 is a schematic structural diagram of a component of an inter-cell interference suppression apparatus according to an embodiment of the present invention, as shown in fig. 6, the apparatus includes a detection module 601, a generation module 602, and an interference cancellation module 603; wherein, the first and the second end of the pipe are connected with each other,

a detecting module 601, configured to perform interference detection on the serving cell according to an interference detection rule agreed with N inter-system neighboring cells of the serving cell; wherein N is greater than or equal to 1;

a generating module 602, configured to generate an interference suppression decision according to an interference detection result; the interference suppression decision is used to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell;

an interference elimination module 603, configured to perform interference elimination processing based on the interference suppression decision.

In one embodiment, the agreed interference detection rule includes:

and performing interference detection on the service cell in the time period of sending the service of each cell in the N inter-system adjacent cells.

In an embodiment, the detecting module 601 is specifically configured to detect a disturbed degree value, where the disturbed degree value is used to indicate a degree of interference experienced by the serving cell.

In an embodiment, the detecting module 601 is specifically configured to obtain an NI measurement value corresponding to the serving cell or a measurement event reported by the UE in the serving cell, and determine the disturbed degree value according to the obtained NI measurement value or the measurement event.

In an embodiment, the generating module 602 is specifically configured to determine, according to an interference detection result, a cell that needs to perform interference suppression in N inter-system neighboring cells of the serving cell; an interference suppression decision is generated for each cell for which interference suppression is required.

In an embodiment, the generating module 602 is specifically configured to, when the disturbed degree value is greater than a preset threshold, determine, among N inter-system neighboring cells of the serving cell, a cell that sends a service when the disturbed degree value is detected as: a cell requiring interference suppression.

In an embodiment, the interference removing module 603 is specifically configured to send a first interference suppression indication message to a base station corresponding to at least one cell in cells that need interference suppression when a total traffic volume of each UE in a serving cell is greater than a traffic volume threshold, where the first interference suppression indication message is used to indicate the corresponding cell to reconfigure a working frequency band;

In an embodiment, the detecting module 601 is further configured to determine a cooperative working manner of the serving cell and the intra-system neighboring cell of the serving cell when working frequency bands of the serving cell and the intra-system neighboring cell of the serving cell overlap, where the cooperative working manner is a working manner that reduces co-frequency interference between the serving cell and the intra-system neighboring cell of the serving cell;

after the service cell adopts the cooperative working mode, the interference detection rule is agreed with N different system adjacent cells of the service cell.

In an embodiment, the detecting module 601 is further configured to notify the updated operating frequency band of the serving cell to base stations corresponding to N inter-system neighboring cells of the serving cell when the operating frequency band of the serving cell is updated.

In practical applications, the detecting module 601, the generating module 602, and the interference canceling module 603 may be implemented by a Central Processing Unit (CPU), a microprocessor Unit (MPU), a Digital Signal Processor (DSP), or a Field Programmable Gate Array (FPGA) in a terminal.

In addition, each functional module in this embodiment may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware or a form of a software functional module.

Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

Specifically, the computer program instructions corresponding to one inter-cell interference suppression method in the present embodiment may be stored on a storage medium such as an optical disc, a hard disc, or a usb disk, and when the computer program instructions corresponding to one inter-cell interference suppression method in the storage medium are read or executed by an electronic device, the steps of any one of the inter-cell interference suppression methods in the foregoing embodiments are implemented.

Based on the same technical concept of the foregoing embodiment, referring to fig. 7, which illustrates an inter-cell interference suppression device 70 provided in an embodiment of the present invention, where the device is located in a base station corresponding to a serving cell, the device may include: a first memory 71, a first processor 72, and a first bus 73; wherein the content of the first and second substances,

the first bus 73 is used for connecting the first memory 71, the first processor 72 and the intercommunication among these devices;

the first memory 71 for storing computer programs and data;

the first processor 72 is configured to execute the computer program stored in the memory to implement the steps of any one of the inter-cell interference suppression methods in the foregoing embodiments.

In practical applications, the first memory 71 may be a volatile memory (RAM); or a non-volatile memory (non-volatile memory) such as a ROM, a flash memory (flash memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); or a combination of the above types of memories and provides instructions and data to the first processor 72.

The first processor 72 may be at least one of an Application Specific Integrated Circuit (ASIC), a DSP, a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), an FPGA, a CPU, a controller, a microcontroller, and a microprocessor. It is to be understood that the electronic device for implementing the first processor function may be other electronic devices, and the embodiment of the present invention is not limited in particular.

Seventh embodiment

On the basis of the inter-cell interference suppression method provided in the foregoing embodiment, a seventh embodiment of the present invention provides an inter-cell interference suppression apparatus, which is applied to a base station corresponding to a neighboring cell of a serving cell in a heterogeneous system.

Fig. 8 is a schematic structural diagram of another inter-cell interference suppression apparatus according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes a first receiving module 801, a first processing module 802, a second receiving module 803, and a second processing module 804; wherein the content of the first and second substances,

a first receiving module 801, configured to receive an interference probe request, where the interference probe request is used to indicate a time period for sending a service of a cell;

a first processing module 802, configured to send a service in a corresponding time period according to the interference detection request;

a second receiving module 803, configured to receive a first interference suppression indication message or a second interference suppression indication message, where the first interference suppression indication message is used to indicate a cell to reconfigure an operating frequency band, and the second interference suppression indication message is used to indicate the cell to keep silent at an appointed time, or to perform service joint transmission with the serving cell at an appointed time;

a second processing module 804, configured to reconfigure an operating frequency band of a cell according to the first interference suppression indication message; or keeping silence at the appointed time according to the second interference suppression indication message; or, according to the second interference suppression indication message, performing joint transmission of service with the serving cell

accordingly, the first processing module 802 is further configured to keep silent in a corresponding time period according to the interference detection request.

In an embodiment, the second processing module 804 is further configured to send a confirmation message that the reconfiguration of the operating frequency band is successful to the serving cell after the reconfiguration of the operating frequency band of the cell is successful; and after the working frequency band of the cell is reconfigured unsuccessfully, sending a confirmation message of failure of reconfiguring the working frequency band to the service cell.

In an embodiment, the first processing module 802 is further configured to notify the updated operating frequency band of the inter-system neighboring cell of the serving cell to the serving cell when the operating frequency band of the inter-system neighboring cell of the serving cell is updated.

In practical applications, the first receiving module 801, the first processing module 802, the second receiving module 803, and the second processing module 804 may all be implemented by a CPU, an MPU, a DSP, an FPGA, or the like located in the terminal.

Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Based on the same technical concept of the foregoing embodiment, referring to fig. 9, another inter-cell interference suppression device 90 provided in an embodiment of the present invention is shown, where the device is located in a base station corresponding to a serving cell, and the device may include: a second memory 91, a second processor 92, and a second bus 93; wherein the content of the first and second substances,

the second bus 93 is used for connecting the second memory 91, the second processor 92 and the intercommunication among these devices;

the second memory 91 for storing computer programs and data;

the second processor 92 is configured to execute the computer program stored in the memory to implement the steps of any one of the inter-cell interference suppression methods in the foregoing embodiments.

In practical applications, the second memory 91 may be a volatile memory, such as a RAM; or a nonvolatile memory such as a ROM, a flash memory, an HDD, or an SSD; or a combination of the above types of memories and provides instructions and data to the second processor 92.

The second processor 92 may be at least one of an application specific integrated circuit ASIC, DSP, DSPD, PLD, FPGA, CPU, controller, microcontroller, or microprocessor. It is understood that the electronic device for implementing the second processor function may be other electronic devices for different apparatuses, and the embodiments of the present invention are not limited in particular.

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

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

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

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

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method for suppressing inter-cell interference, which is applied to a base station corresponding to a serving cell, the method includes:

performing interference detection on the serving cell according to interference detection rules agreed with N inter-system neighboring cells of the serving cell; wherein N is greater than or equal to 1;

performing interference elimination processing based on the interference suppression decision;

the interference detection rule comprises that a base station of a service cell sends an ith interference detection request to a base station corresponding to an ith cell in the N inter-system neighbor cells under the condition that i is from 1 to N, wherein the ith interference detection request is used for indicating a time period for sending a service of the ith cell in the N inter-system neighbor cells; performing interference detection on the serving cell in the time period for sending the service of each cell in the N inter-system neighbor cells;

the performing interference detection on the serving cell comprises: acquiring a noise interference power (NI) measured value corresponding to the serving cell; determining a disturbed degree value according to the obtained NI measured value; the disturbed degree value is used for representing the degree of interference suffered by the serving cell.

2. The method of claim 1, wherein when N is greater than or equal to 2, there is no overlap between time periods for sending traffic of any two cells in the N inter-system neighbor cells.

3. The method of claim 1, wherein when N is greater than or equal to 2, the ith interference probe request is further used to indicate a period of time for keeping silent for an ith cell in the N inter-system neighbor cells; the silence maintaining time period of the ith cell in the N inter-system neighbor cells comprises the following steps: and the time periods of the service sending of other cells in the N inter-system neighbor cells.

4. The method of claim 1, wherein generating an interference suppression decision based on the interference detection result comprises:

5. The method of claim 4, wherein the performing interference detection on the serving cell comprises: detecting a disturbed degree value, wherein the disturbed degree value is used for representing the degree of interference suffered by the serving cell;

when the disturbed degree value is larger than a preset threshold, determining a cell which sends a service when the disturbed degree value is detected as follows in N different-system adjacent cells of the service cell: a cell requiring interference suppression.

6. The method of claim 4, wherein the performing interference cancellation processing based on the interference suppression decision comprises:

when the total traffic of each UE in the serving cell is less than or equal to a traffic threshold, or when the serving cell receives a confirmation message that the reconfiguration of a working frequency band of an inter-system adjacent cell of the serving cell fails, sending a second interference suppression indication message to a base station corresponding to at least one cell in the cells needing interference suppression; the second interference suppression indication message is used to indicate that the corresponding cell keeps silent at an appointed time, or the second interference suppression indication message and the serving cell perform service joint transmission at the appointed time.

7. The method of claim 1, further comprising:

when the working frequency bands of the service cell and the same-system adjacent cells of the service cell are overlapped, determining a cooperative working mode of the service cell and the same-system adjacent cells of the service cell, wherein the cooperative working mode is a working mode for reducing the same-frequency interference between the service cell and the same-system adjacent cells of the service cell;

after the service cell adopts the cooperative working mode, the service cell agrees with an interference detection rule with N different system adjacent cells of the service cell.

8. The method of claim 1, wherein when the serving cell is a Long Term Evolution (LTE) cell, a different system neighboring cell of the serving cell is a new air interface (NR) cell; and when the service cell is an NR cell, the inter-system adjacent cell of the service cell is an LTE cell.

9. The method of claim 1, further comprising:

and when the working frequency band of the service cell is updated, informing the updated working frequency band of the service cell to the base stations corresponding to the N different system adjacent cells of the service cell.

10. A method for suppressing interference between cells is characterized in that the method is applied to a base station corresponding to a different system adjacent cell of a service cell; the method comprises the following steps:

receiving a second interference suppression indication message, wherein the second interference suppression indication message is used for indicating that the service is jointly transmitted with the serving cell at the appointed time;

and performing service joint transmission with the serving cell according to the second interference suppression indication message.

11. The method of claim 10, wherein the interference probing request is further used to indicate a time period for a cell to remain silent;

correspondingly, the method further comprises: and keeping silent in a corresponding time period according to the interference detection request.

12. The method of claim 10, further comprising:

after the working frequency band of the cell is reconfigured successfully, sending a confirmation message of successful reconfiguration of the working frequency band to the service cell; and after the working frequency band of the cell is reconfigured unsuccessfully, sending a confirmation message of the failure of reconfiguring the working frequency band to the service cell.

13. The method of claim 10, further comprising:

and when the working frequency band of the inter-system adjacent cell of the service cell is updated, informing the updated working frequency band of the inter-system adjacent cell of the service cell to the service cell.

14. An inter-cell interference mitigation device, wherein the device is located in a base station corresponding to a serving cell, the device comprising a first processor and a first memory for storing a computer program operable on the first processor; wherein, the first and the second end of the pipe are connected with each other,

the first processor is adapted to perform the steps of the method of any one of claims 1 to 9 when running the computer program.

15. An inter-cell interference mitigation apparatus, wherein the apparatus is located in a base station corresponding to a inter-system neighbor of a serving cell, the apparatus comprises a second processor and a second memory for storing a computer program capable of running on the second processor; wherein the content of the first and second substances,

the second processor is adapted to perform the steps of the method of any of claims 10 to 13 when running the computer program.

16. The device for suppressing the interference between the cells is characterized in that the device is positioned in a base station corresponding to a service cell and comprises a detection module, a generation module and an interference elimination module; wherein the content of the first and second substances,

the generation module is used for generating an interference suppression decision according to the interference detection result; the interference suppression decision is to represent: reducing the same frequency interference caused by the different system adjacent cell of the service cell to the service cell;

the interference elimination module is used for carrying out interference elimination processing based on the interference suppression decision;

when the method is used for carrying out interference detection on the serving cell, the method is also used for obtaining a noise interference power (NI) measured value corresponding to the serving cell; determining a disturbed degree value according to the acquired NI measured value; the disturbed degree value is used for representing the degree of interference suffered by the serving cell.

17. An inter-cell interference suppression device, which is located in a base station corresponding to a heterogeneous system neighboring cell of a serving cell, includes a first receiving module, a first processing module, a second receiving module, and a second processing module,

a second receiving module, configured to receive a second interference suppression indication message, where the second interference suppression indication message is used to indicate that service is jointly transmitted at an appointed time with the serving cell;

and the second processing module is used for performing service joint sending with the serving cell according to the second interference suppression indication message.

18. A computer storage medium having a computer program stored thereon, for use in a base station corresponding to a serving cell, the computer program, when being executed by a processor, implementing the steps of the method according to any one of claims 1 to 9.

19. A computer storage medium having a computer program stored thereon, for use in a base station corresponding to a heterogeneous system neighbor of a serving cell, the computer program, when executed by a processor, implementing the steps of the method of any one of claims 10 to 13.