CN116867080A

CN116867080A - Method, device, equipment, system and storage medium for eliminating interference

Info

Publication number: CN116867080A
Application number: CN202210298056.4A
Authority: CN
Inventors: 周娇; 李新
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2023-10-10

Abstract

The application discloses a method, a device, equipment, a system and a storage medium for eliminating interference, relates to the technical field of communication, and aims to solve the problem that a downlink speed is low due to interference of a macro station on an edge area UE of a cell substation under the condition of sharing the same frequency networking. The method comprises the following steps: acquiring edge UE from standby UE of an indoor cell, wherein the edge UE comprises reference UE and reference UE; receiving a sub-band channel quality indicator CQI and a full-band CQI reported by reference UE, and the full-band CQI reported by the reference UE; acquiring an interference sub-band from a downlink sub-band of the indoor substation according to the sub-band CQI reported by the reference UE, and generating a sub-band interference map according to the interference sub-band; and distributing downlink data transmission resources to the edge UE according to the sub-band interference pattern and the full-band CQI. The application can be applied in 5G NR.

Description

Method, device, equipment, system and storage medium for eliminating interference

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, a system, and a storage medium for eliminating interference.

Background

Due to the influence of many factors such as physical environment, there may be blind areas in signal coverage of an outdoor base station (i.e., macro station), for example: there is no signal or no signal difference in underground parking lot or building. In order to solve the above-mentioned problems, the prior art adopts a manner of setting an indoor base station (i.e. an indoor substation) to provide signal coverage for User Equipment (UE), so that the UE can perform wireless communication normally through the indoor substation even in a macro station signal coverage blind area.

In a fifth generation mobile communication new wireless network (5th Generation Mobile Communication Technology New Radio,5G NR), the macro station and the outstation are co-frequency networked. In the edge area of the indoor substation, such as a window edge or a door edge, the UE can receive signals sent by the macro station and the indoor substation at the same time, and the signal intensity of the macro station is far higher than that of the indoor substation, so that when the UE in the edge area of the indoor substation receives downlink signals, the signal interference of the macro station exists, and the problem of downlink communication speed reduction is caused.

Disclosure of Invention

The embodiment of the application provides a method, a device, equipment, a system and a storage medium for eliminating interference, which are used for solving the problem that the downlink speed is lower because a cell substation edge area UE is interfered by a macro station under the condition of the same-frequency networking.

In a first aspect, an embodiment of the present application provides a method for eliminating interference, which is applied to an indoor substation, where the indoor substation and a macro station are co-frequency networked, and the method includes:

acquiring edge UE from User Equipment (UE) of an indoor cell covered by the indoor substation, wherein the edge UE comprises reference UE and reference UE;

receiving the sub-band channel quality indication CQI and the full-band CQI reported by the reference UE;

Acquiring an interference sub-band from a downlink sub-band of the indoor substation according to the sub-band CQI reported by the reference UE, and generating a sub-band interference map according to the interference sub-band;

and allocating downlink data transmission resources for the reference UE according to the sub-band interference pattern and the full-band CQI reported by the reference UE, and allocating the downlink data transmission resources for the reference UE according to the sub-band interference pattern and the full-band CQI reported by the reference UE.

Optionally, after receiving the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, before allocating downlink data transmission resources to the reference UE according to the sub-band interference spectrum and the full-band CQI reported by the reference UE, the method further includes:

generating a full-band CQI correction value for the reference UE according to the sub-band channel quality indication CQI and the full-band CQI reported by the reference UE;

correcting the full-band CQI reported by the reference UE by adopting the full-band CQI correction value to acquire corrected full-band CQI;

the downlink data transmission resources are respectively allocated to the reference UE according to the sub-band interference pattern and the full-band CQI reported by the reference UE, and are:

And respectively distributing downlink data transmission resources for the reference UE according to the sub-band interference pattern and the corrected full-band CQI corresponding to the reference UE.

Optionally, the full-band CQI correction value is obtained by the following formula:

CQI _other,sch ＝beta*avg(CQI _{refer,non-inter} )/CQI _refer,all *CQI _other,all

wherein CQI is _other,sch For the full-band CQI correction value, beta is a correction coefficient, avg (CQI _{refer,non-inter} ) For the average value of the sub-band CQI after the reference UE avoids the interference sub-band, CQI _refer,all Full-band CQI reported for the reference UE _other,all And reporting the full-band CQI for the reference UE.

Optionally, the allocating downlink data transmission resources for the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, and allocating downlink data transmission resources for the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE respectively includes:

from the non-interference sub-bands of the sub-band interference pattern, a first downlink data transmission sub-band is allocated to the reference UE, and transmission resources are allocated to the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE;

and allocating a second downlink data transmission sub-band for the reference UE from non-interference sub-bands of the sub-band interference pattern, and allocating transmission resources for the second downlink data transmission sub-band according to the full-band CQI reported by the reference UE.

Optionally, after the edge UE is obtained from the UE of the indoor cell covered by the indoor substation, before receiving the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, the method further includes:

dividing the edge UE into a plurality of edge UE sets according to the outdoor cells covered by the macro station to which the edge UE belongs, wherein the edge UE in each edge UE set belongs to the same outdoor cell, and the edge UE in each edge UE set comprises a reference UE and a reference UE;

the receiving the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE is:

and receiving the sub-band channel quality indication CQI and the full-band CQI reported by the reference UE aiming at one edge UE set.

In a second aspect, an embodiment of the present application provides a method for eliminating interference, which is applied to a UE, where the UE is located in an edge area of an indoor cell covered by an indoor substation, and is adjacent to an outdoor cell covered by a macro station, and the indoor substation and the macro station are co-channel networked, and the method includes:

Receiving a narrowband CQI reporting notice sent by the indoor substation, wherein the narrowband CQI reporting notice carries non-interference sub-band information, the non-interference sub-band information is obtained by the indoor substation from a pre-generated sub-band interference pattern, and the sub-band interference pattern is generated by the indoor substation according to the sub-band CQI reported by a reference UE in the UE;

acquiring the signal-to-noise ratio of each non-interference sub-band according to the non-interference sub-band information;

generating a narrow-band signal-to-noise ratio of each non-interference sub-band according to the signal-to-noise ratio of the non-interference sub-band;

and generating a narrowband CQI according to the signal-to-noise ratio of the narrowband, and sending the narrowband CQI to the indoor substation so that the indoor substation allocates downlink data transmission resources for the UE according to the subband interference spectrum and the narrowband CQI.

Optionally, the narrowband signal-to-noise ratio is obtained by the following formula:

wherein SINR _eff For the narrow band signal-to-noise ratio, beta is a normalization parameter, N is the number of non-interference sub-bands, is SINR _n Is the signal to noise ratio of the nth non-interfering subband.

In a third aspect, an embodiment of the present application provides an apparatus for eliminating interference, which is applied to an indoor substation, where an indoor substation and a macro station are co-frequency networked, including:

A first module, configured to obtain an edge UE from a user equipment UE of an indoor cell covered by the indoor substation, where the edge UE includes a reference UE and a reference UE;

a second module, configured to receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE;

a third module, configured to obtain an interference subband from a downlink subband of the indoor substation according to the subband CQI reported by the reference UE, and generate a subband interference pattern according to the interference subband;

and a fourth module, configured to allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, and allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE.

Optionally, the device for eliminating interference further includes:

a fifth module, configured to generate a full-band CQI correction value for the reference UE according to the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, and correct the full-band CQI reported by the reference UE by using the full-band CQI correction value to obtain a corrected full-band CQI;

And the fourth module is further configured to allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the corrected full-band CQI corresponding to the reference UE.

Optionally, the fifth module is further configured to obtain the full-band CQI correction value through the following formula.

Optionally, the fourth module is further configured to allocate a first downlink data transmission sub-band to the reference UE from the non-interference sub-bands of the sub-band interference spectrum, allocate transmission resources to the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE, allocate a second downlink data transmission sub-band to the reference UE from the non-interference sub-bands of the sub-band interference spectrum, and allocate transmission resources to the second downlink data transmission sub-band according to the full-band CQI reported by the reference UE.

Optionally, the device for eliminating interference further includes:

a sixth module, configured to divide the edge UE into a plurality of edge UE sets according to an outdoor cell covered by the macro station to which the edge UE belongs, where the edge UE in each edge UE set belongs to the same outdoor cell, and each edge UE in each edge UE set includes a reference UE and a reference UE;

The second module is further configured to receive, for one of the edge UE sets, a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

In a fourth aspect, an embodiment of the present application provides an apparatus for eliminating interference, which is applied to a UE, where the UE is located in an edge area of an indoor cell covered by an indoor substation, and is adjacent to an outdoor cell covered by a macro station, and the indoor substation and the macro station are configured to perform co-channel networking, where the apparatus includes:

a first module, configured to receive a narrowband CQI reporting notification sent by the indoor substation, where the narrowband CQI reporting notification carries non-interference subband information, where the non-interference subband information is obtained by the indoor substation from a subband interference pattern that is generated by the indoor substation according to a subband CQI reported by a reference UE in the UE;

a second module, configured to obtain a signal-to-noise ratio of each non-interference subband according to the non-interference subband information;

a third module, configured to generate a narrowband signal-to-noise ratio of each non-interference subband according to the signal-to-noise ratio of the non-interference subband;

and a fourth module, configured to generate a narrowband CQI according to the narrowband signal-to-noise ratio, and send the narrowband CQI to the indoor substation, so that the indoor substation allocates downlink data transmission resources for the UE according to the subband interference spectrum and the narrowband CQI.

Optionally, the third module is further configured to obtain the narrowband signal-to-noise ratio through the following formula.

Wherein SINR _eff For the narrow band signal-to-noise ratio, beta is a normalization parameter, N is the number of non-interference sub-bands, is SINR _n Is the nth non-Interfering with the signal-to-noise ratio of the sub-band.

In a fifth aspect, an embodiment of the present application provides a system for canceling interference, including: the indoor cell covered by the indoor substation is adjacent to the outdoor cell covered by the macro station, the indoor substation and the macro station are connected in a same frequency mode, the indoor substation is used for acquiring edge UE from the UE, the edge UE comprises reference UE and reference UE, receiving sub-band CQI and full-band CQI reported by the reference UE, acquiring an interference sub-band from a downlink sub-band of the indoor substation according to the sub-band CQI reported by the reference UE, generating a sub-band interference map according to the interference sub-band, distributing downlink data transmission resources for the reference UE according to the sub-band interference map and the full-band CQI reported by the reference UE, and distributing downlink data transmission resources for the reference UE according to the sub-band interference and the full-band CQI reported by the reference UE.

Optionally, the indoor substation is further configured to generate a full-band CQI correction value for the reference UE according to the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, correct the full-band CQI reported by the reference UE by using the full-band CQI correction value, obtain a corrected full-band CQI, and allocate downlink data transmission resources to the reference UE according to the sub-band interference pattern and the corrected full-band CQI corresponding to the reference UE.

Optionally, the indoor substation is further configured to obtain the full-band CQI correction value according to the following formula.

Optionally, the indoor substation is further configured to allocate a first downlink data transmission sub-band from a non-interference sub-band of the sub-band interference spectrum to the reference UE, allocate a transmission resource to the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE, allocate a second downlink data transmission sub-band from the non-interference sub-band of the sub-band interference spectrum to the reference UE, and allocate a transmission resource to the second downlink data transmission sub-band according to the full-band CQI reported by the reference UE.

Optionally, the indoor substation is further configured to divide the edge UE into a plurality of edge UE sets according to an outdoor cell covered by the macro station to which the edge UE belongs, where the edge UE in each of the edge UE sets belongs to the same outdoor cell, each of the edge UEs in each of the edge UE sets includes a reference UE and a reference UE, and for one of the edge UE sets, receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

In a sixth aspect, an embodiment of the present application provides a system for canceling interference, including: the indoor station and the UE are positioned in the edge area of an indoor cell covered by the indoor station, are adjacent to an outdoor cell covered by a macro station, the indoor station and the macro station are connected in a same-frequency networking mode,

the indoor substation is used for generating a sub-band interference map in advance according to sub-band CQI reported by reference UE in the UE, acquiring non-interference sub-band information from the sub-band interference map, carrying the non-interference sub-band information in a narrow-band CQI reporting notice and sending the non-interference sub-band information to the UE, receiving the narrow-band CQI returned by the UE, and distributing downlink data transmission resources for the UE according to the sub-band interference map and the narrow-band CQI;

The UE is configured to receive the narrowband CQI reporting notification, obtain a signal-to-noise ratio of each non-interference subband according to the non-interference subband information, generate a narrowband signal-to-noise ratio of the non-interference subband according to the signal-to-noise ratio of each non-interference subband, generate a narrowband CQI according to the narrowband signal-to-noise ratio, and send the narrowband CQI to the indoor substation.

Optionally, the UE is further configured to obtain the narrowband signal-to-noise ratio through the following formula.

In a seventh aspect, an embodiment of the present application provides an apparatus for eliminating interference, which is applied to a indoor substation, where the indoor substation and a macro station are co-channel networked, and the apparatus includes: a processor and a transceiver;

the processor is configured to obtain an edge UE from a UE of an indoor cell covered by the indoor substation, where the edge UE includes a reference UE and a plurality of reference UEs, obtain an interference subband from a downlink subband of the indoor substation according to a subband CQI reported by the reference UE, generate a subband interference spectrum according to the interference subband, allocate downlink data transmission resources to the reference UE according to the subband interference spectrum and a full-band CQI reported by the reference UE, and allocate downlink data transmission resources to the reference UE according to the subband interference spectrum and the full-band CQI reported by the reference UE, respectively;

The transceiver is configured to receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

Optionally, the processor is further configured to generate a full-band CQI correction value for the reference UE according to the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, correct the full-band CQI reported by the reference UE by using the full-band CQI correction value, obtain a corrected full-band CQI, and allocate downlink data transmission resources to the reference UE according to the sub-band interference pattern and the corrected full-band CQI corresponding to the reference UE.

Optionally, the processor is further configured to obtain the full-band CQI correction value by the following formula.

Optionally, the processor is further configured to allocate a first downlink data transmission sub-band to the reference UE from the non-interference sub-bands of the sub-band interference spectrum, allocate transmission resources to the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE, allocate a second downlink data transmission sub-band to the reference UE from the non-interference sub-bands of the sub-band interference spectrum, and allocate transmission resources to the second downlink data transmission sub-band according to the full-band CQI reported by the reference UE.

Optionally, the processor is further configured to divide the edge UE into a plurality of edge UE sets according to an outdoor cell covered by the macro station to which the edge UE belongs, where the edge UE in each of the edge UE sets belongs to the same outdoor cell, and each of the edge UEs in each of the edge UE sets includes a reference UE and a reference UE, and for one of the edge UE sets, receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

In an eighth aspect, an embodiment of the present application provides an apparatus for eliminating interference, which is applied to a UE, where the UE is located in an edge area of an indoor cell covered by an indoor substation, and is adjacent to an outdoor cell covered by a macro station, and the indoor substation and the macro station are configured to perform co-channel networking, where the apparatus includes: a processor and a transceiver;

the transceiver is configured to receive a narrowband CQI reporting notification sent by the indoor station, where the narrowband CQI reporting notification carries non-interference subband information, where the non-interference subband information is obtained by the indoor station from a pre-generated subband interference pattern, where the subband interference pattern is generated by the indoor station according to a subband CQI reported by a reference UE in the UE, and send the narrowband CQI to the indoor station, so that the indoor station allocates downlink data transmission resources to the UE according to the subband interference pattern and the narrowband CQI

The processor is configured to obtain a signal-to-noise ratio of each non-interference sub-band according to the non-interference sub-band information, generate a narrowband signal-to-noise ratio of the non-interference sub-band according to the signal-to-noise ratio of each non-interference sub-band, and generate a narrowband CQI according to the narrowband signal-to-noise ratio.

Optionally, the processor is further configured to obtain the narrowband signal-to-noise ratio by the following formula.

In a ninth aspect, an embodiment of the present application provides a communication device, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor is configured to read the program in the memory to implement the steps in the method for eliminating interference described above.

In a tenth aspect, embodiments of the present application provide a readable storage medium storing a program which, when executed by a processor, implements the steps in the above-described method of cancelling interference.

In the embodiment of the application, the indoor substation can acquire the edge UE from the UE of the indoor cell, determines the interference sub-band in the downlink sub-band according to the sub-band CQI reported by the reference UE selected from the edge UE, generates the sub-band interference spectrum, and respectively distributes downlink data transmission resources for each edge UE by combining the sub-band interference spectrum and the full-band CQI reported by each edge UE, thereby avoiding the problem of lower downlink speed caused by macro station interference of the edge UE of the indoor substation under the same-frequency networking condition; because the interference sub-bands of all edge UE are the same, the indoor substation only needs to refer to the UE to report the sub-band CQI and does not need to refer to the UE to report the sub-band CQI, so that the technical scheme provided by the embodiment of the application has stronger applicability, and because only the UE is referred to report the sub-band CQI, the physical uplink control channel PUCCH (Physical Uplink Control Channel ) resources occupied by the reported sub-band CQI are smaller, and the problems of large PUCCH overhead and limited uplink rate caused by the simultaneous report of the sub-band CQI by a plurality of edge UEs are avoided; the interference sub-band is determined according to the sub-band CQI reported by the reference UE, so that the indoor sub-station can more accurately avoid the interference sub-band when distributing the downlink sub-band for the edge UE, and the problem of poor interference elimination capability caused by the preset fixed avoidance sub-band of the indoor sub-station (such as sub-band used by a macro station for transmitting a synchronous signal block SSB/a channel state information reference signal CSI-RS/a physical downlink control channel PDSCH) is avoided; in addition, the technical scheme provided by the embodiment of the application only needs to avoid the interference sub-bands of the edge UE, and does not need to avoid the interference sub-bands of other UEs, so that the indoor substation can more reasonably allocate downlink data transmission resources aiming at different UEs, and the problem of downlink data transmission resource waste caused by the unified interference sub-band avoidance of all UEs by the indoor substation is avoided.

In addition, in the embodiment of the application, for the situation that the indoor station acquires the sub-band interference spectrum in advance, the indoor station can also instruct the edge UE to report only the CQI of the non-interference sub-band, namely the narrowband CQI, so that the purpose of saving the computing power of the edge UE is achieved, and the narrowband CQI is more accurate because the narrowband CQI does not contain the CQI of the interference sub-band, so that the indoor station can more reasonably allocate downlink data transmission resources for the edge UE according to the sub-band interference spectrum and the narrowband CQI.

Drawings

FIG. 1 is one of the flowcharts of a method for canceling interference provided by an embodiment of the present application;

fig. 2 is a schematic diagram of an application scenario of a method for eliminating interference provided in the embodiment of the present application shown in fig. 1;

FIG. 3 is a schematic diagram of a subband interference pattern in the method for canceling interference according to the embodiment of the present application shown in FIG. 1;

FIG. 4 is a second flowchart of a method for eliminating interference according to an embodiment of the present application;

FIG. 5 is a third flowchart of a method for eliminating interference according to an embodiment of the present application;

fig. 6 is a schematic diagram of an application scenario of a method for eliminating interference provided in the embodiment of the present application shown in fig. 5;

FIG. 7 is a fourth flowchart of a method for eliminating interference according to an embodiment of the present application;

FIG. 8 is a block diagram of an apparatus for canceling interference according to an embodiment of the present application;

FIG. 9 is a second block diagram of an apparatus for eliminating interference according to an embodiment of the present application;

FIG. 10 is a third block diagram of an apparatus for canceling interference according to an embodiment of the present application;

fig. 11 is a diagram illustrating a structure of an apparatus for eliminating interference according to an embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1, fig. 1 is a flowchart of a method for eliminating interference provided in an embodiment of the present application, in this embodiment, the method for eliminating interference shown in fig. 1 is applied to a cell substation 1 shown in fig. 2, an indoor cell 3 covered by the cell substation 1 is adjacent to an outdoor cell 4 covered by a macro station 2, and the cell substation 1 and the macro station 2 are co-frequency networked before each other. As shown in fig. 1, the method comprises the following steps:

step 101, acquiring edge UE from UE of indoor cells covered by an indoor substation, wherein the edge UE comprises reference UE and reference UE.

In this embodiment, the method for acquiring the edge UE from the UEs of the indoor cells covered by the indoor substation in step 101 may include the following steps:

first, an on-channel measurement report reported by a UE is received, wherein the on-channel measurement report carries a physical cell identifier (Physical Cell Identifier, PCI) and reference signal received power (ReferenceSignal Receiving Power, RSRP).

And secondly, acquiring the edge UE according to the PCI and the RSRP.

Specifically, for the UE located in the edge area of the indoor cell, the UE may receive the PCI of the indoor cell and the PCI of the outdoor cell at the same time because of the proximity to the outdoor cell, and the UE located in the central area of the indoor cell may only receive the PCI of the indoor cell, so that the technical scheme provided in this embodiment may determine the edge UE according to the PCI. Further, in the process of implementing the present application, experiments prove that signal interference can be serious only within a certain range for a UE capable of receiving the PCI of the indoor cell and the PCI of the outdoor cell, and based on the above position factor consideration, the embodiment can calculate the difference between the RSRP of the outdoor cell reported by the UE and the RSRP of the indoor cell, obtain a difference result, compare the difference result with a preset difference threshold, and determine that the UE is an edge UE if the difference result is smaller than the difference threshold. The method can further reduce the number of the edge UE, so that the technical scheme provided by the embodiment can accurately eliminate interference for the edge UE with serious interference.

For example: the UE indicated by 51a and 51b shown in fig. 2 may receive the PCI of the indoor cell and the PCI of the outdoor cell at the same time, and the difference between the RSRP of the outdoor cell and the RSRP of the indoor cell reported by the UE indicated by 51a and 51b is smaller than the preset difference threshold, and the UE indicated by 52 only receives the PCI of the indoor cell, so the UE indicated by 51a and 51b is edge UE, and the UE indicated by 52 is center UE.

It should be noted that, in this embodiment, the difference threshold is not specifically limited, and may be set as required in the actual use process, and in this embodiment, the difference threshold may be 6dB.

In this embodiment, a UE with a subband channel quality indication (channel quality indication, CQI) reporting capability may be arbitrarily designated from edge UEs as a reference UE, and other UEs as reference UEs, for example: as shown in fig. 2, 51a is a reference UE,51b is a reference UE, 2 reference UEs are shown in fig. 2, and in actual use, a plurality of reference UEs are shown, and fig. 2 is only an example of 2 reference UEs. Further, in order to make the reference UE more representative, the present embodiment may select the reference UE from the edge UEs according to the obtained difference result obtained by the UE.

It should be noted that, in order to save the overhead of the PUCCH, the embodiment is described by taking 1 reference UE as an example, and in the actual use process, the reference UE may be multiple, for example: 2 or 3, etc., the specific number being set according to PUCCH occupancy.

Step 102, receiving the sub-band CQI and the full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

It should be noted that, in this embodiment, the number of downlink subbands used by the indoor substation is not limited, and in an actual use process, the number of downlink subbands is determined according to the communication capability of the indoor substation, and may include: 10. 16, 20, etc., for convenience of understanding, the present embodiment only uses 10 downlink subbands as an example, where the 10 downlink subbands are respectively: subband 0, subbands 1, … …, subband 9.

The sub-band CQI in this embodiment is CQI of each sub-band, namely CQI corresponding to sub-band 0 ₀ CQI corresponding to subband 1 ₁ CQI corresponding to … … subband 9 ₉ 。

Full band CQI based on CQI ₀ 、CQI ₁ ，……，CQI ₉ And (5) calculating to obtain the product.

And 103, acquiring an interference sub-band from a downlink sub-band of the indoor substation according to the sub-band CQI reported by the reference UE, and generating a sub-band interference map according to the interference sub-band.

In this embodiment, when the subband CQI is smaller than the preset CQI threshold, the subband corresponding to the subband CQI is an interfering subband, otherwise, is a non-interfering subband.

Note that, the CQI threshold may be a fixed value set in advance, for example: the CQI threshold may be preset to 4; the CQI threshold may also be obtained according to the full band COI reported by the reference UE and by the following formula (1):

alpha*CQI _refer,all (1)

wherein alpha is the interference area adjustment coefficient, alpha E (0, 1), CQI _refer,all And the full-band COI reported for the reference UE.

The CQI threshold can be set according to the full-band COI reported by the reference UE, so that the CQI threshold can be set more reasonably according to actual requirements.

In order to facilitate understanding, in the subband interference spectrum generated in this embodiment, the interference subband value is 1, the non-interference subband value is 0, and in the actual use process, the interference subband value may also be set to 0, and the non-interference subband value is set to 1, which is not repeated here.

For example: when the number of downlink self-bands is 10, for the case that the sub-band 0 and the sub-band 2 are interference sub-bands and the other sub-bands are non-interference sub-bands, the sub-band interference spectrum can be specifically shown in fig. 3.

And 104, allocating downlink data transmission resources for the reference UE according to the sub-band interference pattern and the full-band CQI reported by the reference UE, and allocating the downlink data transmission resources for the reference UE according to the sub-band interference pattern and the full-band CQI reported by the reference UE.

Specifically, step 104 may allocate a first downlink data transmission sub-band for the reference UE from the non-interference sub-bands of the sub-band interference spectrum, and allocate transmission resources for the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE; and from non-interference subbands of the subband interference pattern, a second downlink data transmission subband is allocated for the reference UE, and transmission resources are allocated for the second downlink data transmission subband according to the full-band CQI reported by the reference UE. In this embodiment, the transmission resource may specifically be a transmission speed, and if the full-band CQI value is high, the transmission speed of the downlink data transmission sub-band is high, otherwise, the transmission speed of the downlink data transmission sub-band is low.

In the embodiment of the application, the indoor substation can acquire the edge UE from the UE of the indoor cell, determines the interference sub-band in the downlink sub-band according to the sub-band CQI reported by the reference UE selected from the edge UE, generates the sub-band interference spectrum, and respectively distributes downlink data transmission resources for each edge UE by combining the sub-band interference spectrum and the full-band CQI reported by each edge UE, thereby avoiding the problem of lower downlink speed caused by macro station interference of the edge UE of the indoor substation under the same-frequency networking condition; because the interference sub-bands of all edge UE are the same, the indoor substation only needs to refer to the UE to report the sub-band CQI and does not need to refer to the UE to report the sub-band CQI, so that the technical scheme provided by the embodiment of the application has stronger applicability, and because only the reference UE reports the sub-band CQI, the Physical Uplink Control Channel (PUCCH) resources occupied by reporting the sub-band CQI are smaller, and the problems of high PUCCH overhead and limited uplink rate caused by simultaneously reporting the sub-band CQI by a plurality of edge UEs are avoided; the interference sub-band is determined according to the sub-band CQI reported by the reference UE, so that the indoor sub-station can more accurately avoid the interference sub-band when distributing the downlink sub-band for the edge UE, and the problem of poor interference elimination capability caused by the preset fixed avoidance sub-band of the indoor sub-station (such as sub-band used by a macro station for transmitting a synchronous signal block SSB/a channel state information reference signal CSI-RS/a physical downlink control channel PDSCH) is avoided; in addition, the technical scheme provided by the embodiment of the application only needs to avoid the interference sub-bands of the edge UE, and does not need to avoid the interference sub-bands of other UEs, so that the indoor substation can more reasonably allocate downlink data transmission resources aiming at different UEs, and the problem of downlink data transmission resource waste caused by the unified interference sub-band avoidance of all UEs by the indoor substation is avoided.

Referring to fig. 4, fig. 4 is a flowchart of a method for eliminating interference provided in an embodiment of the present application, and the steps of the method for eliminating interference disclosed in the embodiment are substantially the same as those shown in fig. 1, where after step 102, before step 104, the method may further include:

and 105, generating a full-band CQI correction value for the reference UE according to the CQI and the full-band CQI reported by the reference UE.

Specifically, the full-band CQI correction value can be obtained by the following formula (2):

CQI _other,sch ＝beta*avg(CQI _{refer,non-inter} )/CQI _refer,all *CQI _other,all (2)

wherein CQI is _other,sch For the full-band CQI correction value, beta is the correction coefficient, avg (CQI _{refer,non-inter} ) For reference UE to avoid the average value of sub-band CQI after interfering sub-band, CQI _refer,all Full band CQI reported for reference UE _other,all For reference to the full band CQI reported by the UE.

In this embodiment, beta e (0, 1), beta may be a preset fixed value; the variable value may also be set according to a relative position between the reference UE and the reference UE, where the relative position between the reference UE and the reference UE may be determined according to a difference between an RSRP reported by the reference UE and an RSRP reported by the reference UE.

And 106, correcting the full-band CQI reported by the reference UE by adopting the full-band CQI correction value to acquire corrected full-band CQI.

Step 104 is replaced with: and respectively distributing downlink data transmission resources for the reference UE according to the sub-band interference pattern and the corrected full-band CQI corresponding to the reference UE.

The technical solution provided in this embodiment, on the basis of achieving the beneficial effects provided in the embodiment shown in fig. 1, may correct the full-band CQI of the reference UE by referring to the sub-band CQI and the full-band CQI reported by the UE and the full-band CQI reported by the reference UE, so as to avoid the problem that the full-band CQI reported by the reference UE includes the CQI of the interfering sub-band, resulting in a lower full-band CQI value of the reference UE and affecting the downlink transmission speed.

Referring to fig. 5, fig. 5 is a flowchart of a method for eliminating interference provided in an embodiment of the present application, in this embodiment, the method for eliminating interference shown in fig. 5 is applied to a cell substation 1 shown in fig. 6, an indoor cell 3 covered by the cell substation 1 is adjacent to an outdoor cell 4a covered by a macro station 2a, and an outdoor cell 4b covered by a macro station 2b, respectively, and the cell substation 1 is co-frequency networked before the macro station 2a and the macro station 2b, respectively. The steps of the method for eliminating interference provided in this embodiment are substantially the same as those shown in fig. 1, and the difference is that, after step 101, before step 102, the method further includes:

step 107, dividing the edge UE into a plurality of edge UE sets according to the outdoor cells covered by the macro station to which the edge UE belongs, wherein the edge UE in each edge UE set belongs to the same outdoor cell, and the edge UE in each edge UE set comprises a reference UE and a reference UE.

For ease of understanding, referring to fig. 6, the indoor cell 3 includes 6 UEs, and according to the technical solution provided in step 101, it can be known that 5 UEs indicated by 51a and 51b are edge UEs, and 1 UE indicated by 52 is a center UE. Step 107 may be based on the PCI knowledge of the outdoor cell reported by the 5 UEs indicated by 51a and 51b, where the 5 UEs indicated by 51a and 51b belong to the outdoor cell 4a and the outdoor cell 4b, respectively, as shown in fig. 6, the 2 UEs indicated by 51a and 51b belong to the outdoor cell 4a, the 3 UEs indicated by 51a and 51b belong to the outdoor cell 4b, the 2 UEs belonging to the outdoor cell 4a are divided into one edge UE set corresponding to 61 in fig. 6, and the 3 UEs belonging to the outdoor cell 4a are divided into one edge UE set corresponding to 62 in fig. 6. The UE indicated by 51a is a reference UE, the UE indicated by 51b is a reference UE, and as shown in fig. 6, the edge UE set 61 includes 1 reference UE and 1 reference UE, and the edge UE set 62 includes 1 reference UE and 2 reference UEs.

Then step 102 is replaced with: for one edge UE set, receiving a sub-band channel quality indication CQI and a full band CQI reported by a reference UE, and the full band CQI reported by the reference UE.

The technical solution provided in this embodiment, on the basis of achieving the beneficial effects brought by the technical solution shown in fig. 1, may make the data transmission resources used between the edge UEs different due to the different home outdoor cells, and the edge UEs of the same outdoor cells are divided into a group, so that the data transmission resources can be more reasonably allocated.

Referring to fig. 7, fig. 7 is a flowchart of a method for canceling interference provided in the embodiment of the present application, in which the method for canceling interference shown in fig. 7 is applied to an edge UE (51 a and/or 51 b) shown in fig. 2 or fig. 6, when applied to the edge UE shown in fig. 2, an indoor cell 3 covered by a cell substation 1 is co-frequency-networked with an outdoor cell 4 covered by a macro station 2, and when applied to the edge UE shown in fig. 6, an indoor cell 3 covered by the cell substation 1 is respectively adjacent to an outdoor cell 4a covered by a macro station 2a and an outdoor cell 4b covered by a macro station 2b, and the cell substation 1 is co-frequency-networked with a macro station 2a and a macro station 2b, respectively.

As shown in fig. 7, the method for eliminating interference provided in this embodiment includes the following steps:

and 701, receiving a narrowband CQI reporting notice sent by the indoor substation, wherein the narrowband CQI reporting notice carries non-interference sub-band information, the non-interference sub-band information is obtained by the indoor substation from a pre-generated sub-band interference pattern, and the sub-band interference pattern is generated by the indoor substation according to the sub-band CQI reported by a reference UE in the UE.

An exemplary interference pattern described in this embodiment may be shown in fig. 3, and a specific generation method may be described with reference to the related steps shown in fig. 1, which are not described herein.

Step 702, obtaining the signal-to-noise ratio of each non-interference sub-band according to the non-interference sub-band information.

Step 703, generating a narrowband signal-to-noise ratio of the non-interference sub-bands according to the signal-to-noise ratio of each non-interference sub-band.

In this embodiment, the narrowband signal-to-noise ratio is obtained by the following formula (3):

Step 704, generating a narrowband CQI according to the signal-to-noise ratio of the narrowband, and sending the narrowband CQI to the indoor substation, so that the indoor substation allocates downlink data transmission resources for the UE according to the subband interference pattern and the narrowband CQI.

In the embodiment of the application, for the situation that the indoor substation acquires the sub-band interference spectrum in advance, the indoor substation can also instruct the edge UE to report the CQI of the non-interference sub-band only, namely the narrowband CQI, so that the purpose of saving the computing power of the edge UE is achieved, and the narrowband CQI is more accurate because the narrowband CQI does not contain the CQI of the interference sub-band, so that the indoor substation can more reasonably allocate downlink data transmission resources for the edge UE according to the sub-band interference spectrum and the narrowband CQI.

The embodiment of the application provides a device for eliminating interference, which is applied to a room substation, wherein the room substation and a macro station are in same-frequency networking, and as shown in fig. 8, the device 800 for eliminating interference comprises:

A first module 801, configured to obtain an edge UE from a user equipment UE of an indoor cell covered by the indoor substation, where the edge UE includes a reference UE and a reference UE;

a second module 802, configured to receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE;

a third module 803, configured to obtain an interference subband from a downlink subband of the indoor substation according to the subband CQI reported by the reference UE, and generate a subband interference pattern according to the interference subband;

a fourth module 804, configured to allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, and allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, respectively.

Optionally, the apparatus 800 for eliminating interference further includes:

The fourth module 804 is further configured to allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the corrected full-band CQI corresponding to the reference UE, respectively.

Optionally, the fourth module 804 is further configured to allocate a first downlink data transmission sub-band to the reference UE from the non-interference sub-bands of the sub-band interference spectrum, allocate transmission resources to the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE, allocate a second downlink data transmission sub-band to the reference UE from the non-interference sub-bands of the sub-band interference spectrum, and allocate transmission resources to the second downlink data transmission sub-band according to the full-band CQI reported by the reference UE.

Optionally, the apparatus 800 for eliminating interference further includes:

The second module 802 is further configured to receive, for one of the edge UE sets, a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

The specific implementation method of the apparatus 800 for eliminating interference provided in this embodiment may be described with reference to the method for eliminating interference provided in this embodiment shown in fig. 1 to fig. 6, and will not be described herein.

The embodiment of the application provides a device for eliminating interference, which is applied to UE, wherein the UE is positioned in an edge area of an indoor cell covered by an indoor substation and is adjacent to an outdoor cell covered by a macro station, the indoor substation and the macro station are networked in the same frequency, as shown in fig. 9, and the device 900 for eliminating interference comprises:

a first module 901, configured to receive a narrowband CQI reporting notification sent by the indoor substation, where the narrowband CQI reporting notification carries non-interference subband information, where the non-interference subband information is obtained by the indoor substation from a subband interference pattern that is generated by the indoor substation according to a subband CQI reported by a reference UE in the UE;

a second module 902, configured to obtain a signal-to-noise ratio of each non-interference subband according to the non-interference subband information;

a third module 903, configured to generate a narrowband signal-to-noise ratio of the non-interference sub-bands according to the signal-to-noise ratio of each non-interference sub-band;

and a fourth module 904, configured to generate a narrowband CQI according to the narrowband signal-to-noise ratio, and send the narrowband CQI to the indoor substation, so that the indoor substation allocates downlink data transmission resources for the UE according to the subband interference pattern and the narrowband CQI.

Optionally, the third module 903 is further configured to obtain the narrowband signal-to-noise ratio through the following formula.

The specific implementation method of the apparatus 900 for eliminating interference provided in this embodiment may be described with reference to the method for eliminating interference provided in this embodiment shown in fig. 7, which is not described herein.

The embodiment of the application provides a device for eliminating interference, which is applied to a room substation, wherein the room substation and a macro station are in the same-frequency networking, as shown in fig. 10, and the device comprises: a processor 1001 and a transceiver 1002;

the processor 1001 is configured to obtain an edge UE from a UE of an indoor cell covered by the indoor substation, where the edge UE includes a reference UE and a reference UE, obtain an interference subband from a downlink subband of the indoor substation according to a subband CQI reported by the reference UE, generate a subband interference pattern according to the interference subband, allocate downlink data transmission resources to the reference UE according to the subband interference pattern and a full-band CQI reported by the reference UE, and allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, respectively;

The transceiver 1002 is configured to receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and the full-band CQI reported by the reference UE.

Optionally, the processor 1001 is further configured to generate a full-band CQI correction value for the reference UE according to the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, correct the full-band CQI reported by the reference UE by using the full-band CQI correction value, obtain a corrected full-band CQI, and allocate downlink data transmission resources to the reference UE according to the sub-band interference pattern and the corrected full-band CQI corresponding to the reference UE.

Optionally, the processor 1001 is further configured to obtain the full-band CQI correction value according to the following formula.

Wherein CQI is _other,sch For the full-band CQI correction value, beta is a correction coefficient, avg (CQI _{refer,non-inter} ) For the average value of the sub-band CQI after the reference UE avoids the interference sub-band, CQI _refer,all Is saidFull band CQI reported by reference UE _other,all And reporting the full-band CQI for the reference UE.

Optionally, the processor 1001 is further configured to allocate a first downlink data transmission sub-band to the reference UE from non-interference sub-bands of the sub-band interference spectrum, allocate transmission resources to the first downlink data transmission sub-band according to the full-band CQI reported by the reference UE, allocate a second downlink data transmission sub-band to the reference UE from non-interference sub-bands of the sub-band interference spectrum, and allocate transmission resources to the second downlink data transmission sub-band according to the full-band CQI reported by the reference UE.

Optionally, the processor 1001 is further configured to divide the edge UE into a plurality of edge UE sets according to an outdoor cell covered by the macro station to which the edge UE belongs, where the edge UE in each of the edge UE sets belongs to the same outdoor cell, and each of the edge UEs in each of the edge UE sets includes a reference UE and a reference UE, and for one of the edge UE sets, receive a sub-band channel quality indicator CQI and a full-band CQI reported by the reference UE, and a full-band CQI reported by the reference UE.

The specific implementation method of the device for eliminating interference provided in this embodiment may be described with reference to the method for eliminating interference provided in this embodiment shown in fig. 1 to fig. 6, and will not be described herein.

The embodiment of the application provides a device for eliminating interference, which is applied to UE, wherein the UE is positioned in an edge area of an indoor cell covered by an indoor substation and is adjacent to an outdoor cell covered by a macro station, and the indoor substation and the macro station are networked in the same frequency, as shown in fig. 11, and the device comprises: a processor 1101 and a transceiver 1102;

the transceiver 1102 is configured to receive a narrowband CQI reporting notification sent by the indoor station, where the narrowband CQI reporting notification carries non-interference subband information, where the non-interference subband information is obtained by the indoor station from a pre-generated subband interference pattern, where the subband interference pattern is generated by the indoor station according to a subband CQI reported by a reference UE in the UE, and send the narrowband CQI to the indoor station, so that the indoor station allocates downlink data transmission resources to the UE according to the subband interference pattern and the narrowband CQI

The processor 1101 is configured to obtain a signal-to-noise ratio of each non-interference subband according to the non-interference subband information, generate a narrowband signal-to-noise ratio of the non-interference subband according to the signal-to-noise ratio of each non-interference subband, and generate a narrowband CQI according to the narrowband signal-to-noise ratio.

Optionally, the processor 1101 is further configured to obtain the narrowband signal-to-noise ratio by the following formula.

The specific implementation method of the device for eliminating interference provided in this embodiment may be described with reference to the method for eliminating interference provided in this embodiment shown in fig. 7, which is not described herein.

The embodiment of the application provides a system for eliminating interference, which comprises the following steps: the indoor cell covered by the indoor substation is adjacent to the outdoor cell covered by the macro station, the indoor substation and the macro station are connected in a same frequency mode, the indoor substation is used for acquiring edge UE from the UE, the edge UE comprises reference UE and reference UE, receiving sub-band CQI and full-band CQI reported by the reference UE, acquiring an interference sub-band from a downlink sub-band of the indoor substation according to the sub-band CQI reported by the reference UE, generating a sub-band interference map according to the interference sub-band, distributing downlink data transmission resources for the reference UE according to the sub-band interference map and the full-band CQI reported by the reference UE, and distributing downlink data transmission resources for the reference UE according to the sub-band interference and the full-band CQI reported by the reference UE.

The specific implementation method of the interference cancellation system provided in this embodiment may be described with reference to the method for interference cancellation provided in this embodiment shown in fig. 1 to fig. 6, which is not described herein.

The embodiment of the application provides a system for eliminating interference, which comprises the following steps: the indoor station and the UE are positioned in the edge area of an indoor cell covered by the indoor station, are adjacent to an outdoor cell covered by a macro station, the indoor station and the macro station are connected in a same-frequency networking mode,

The specific implementation method of the interference cancellation system provided in this embodiment may be described with reference to the method for interference cancellation provided in this embodiment shown in fig. 7, which is not described herein.

The embodiment of the application also provides a communication device, which comprises: a transceiver, a memory, a processor and a program stored on the memory and executable on the processor, which processor, when executing the program, implements the steps in the method of cancelling interference as described above.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including 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 according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The embodiment of the application also provides a readable storage medium, and a program is stored on the readable storage medium, and when the program is executed by a processor, the processes of the above method embodiment for eliminating interference are realized, and the same technical effects can be achieved, so that repetition is avoided, and no further description is provided here. The readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memories (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical memories (e.g., CD, DVD, BD, HVD, etc.), semiconductor memories (e.g., ROM, EPROM, EEPROM, nonvolatile memories (NAND FLASH), solid State Disks (SSD)), etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. In light of such understanding, the technical solutions of the present application may be embodied essentially or in part in the form of a software product stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a cell phone, computer, server, air conditioner, or network device, etc.) to perform the methods described in the various embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A method for eliminating interference, applied to a cell substation, wherein the cell substation and a macro station are networked in the same frequency, and the method comprises the following steps:

2. The method of claim 1, wherein after receiving the sub-band channel quality indicator CQI and the full-band CQI reported by the reference UE, before allocating downlink data transmission resources to the reference UE according to the sub-band interference pattern and the full-band CQI reported by the reference UE, respectively, the method further comprises:

3. The method of claim 2, wherein the full-band CQI correction value is obtained by the following formula:

4. The method of claim 1, wherein allocating downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, and allocating downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, respectively, comprises:

5. The method according to any one of claims 1-4, wherein after the obtaining the edge UE from the UE of the indoor cell covered by the indoor substation, the receiving the sub-band channel quality indicator CQI and the full band CQI reported by the reference UE, and before the full band CQI reported by the reference UE, further includes:

6. A method for eliminating interference, applied to a UE, where the UE is located in an edge area of an indoor cell covered by a cell substation and is adjacent to an outdoor cell covered by a macro station, and the cell substation and the macro station are co-frequency networked, the method is characterized by comprising:

7. The method of claim 6, wherein the narrowband signal-to-noise ratio is obtained by the formula:

wherein SINR _eff For a narrowband signal-to-noise ratio, beta is a normalization parameter, N is the number of non-interfering subbands,for SINR _n Is the signal to noise ratio of the nth non-interfering subband.

8. An apparatus for eliminating interference, applied to a cell substation, wherein the cell substation and a macro station are co-frequency networked, and the apparatus comprises:

9. An apparatus for eliminating interference, applied to a UE, where the UE is located in an edge area of an indoor cell covered by a indoor substation and is adjacent to an outdoor cell covered by a macro station, and the indoor substation and the macro station are co-frequency networked, where the apparatus is characterized by comprising:

10. A system for canceling interference, comprising: an indoor cell covered by an indoor substation is adjacent to an outdoor cell covered by a macro station, the indoor substation and the macro station are in same-frequency networking, and the method is characterized in that,

the indoor substation is configured to obtain an edge UE from the UE, where the edge UE includes a reference UE and a reference UE, receive a sub-band CQI and a full-band CQI reported by the reference UE, and obtain an interference sub-band from a downlink sub-band of the indoor substation according to the sub-band CQI reported by the reference UE, generate a sub-band interference spectrum according to the interference sub-band, allocate downlink data transmission resources to the reference UE according to the sub-band interference spectrum and the full-band CQI reported by the reference UE, and allocate downlink data transmission resources to the reference UE according to the sub-band interference spectrum and the full-band CQI reported by the reference UE.

11. A system for canceling interference, comprising: the indoor station and the UE are positioned in the edge area of an indoor cell covered by the indoor station and adjacent to an outdoor cell covered by a macro station, the indoor station and the macro station are connected in a same-frequency networking mode, and the indoor station is characterized in that,

12. An apparatus for eliminating interference, applied to a indoor substation, wherein the indoor substation and a macro station are co-frequency networked, and the apparatus comprises: a processor and a transceiver; it is characterized in that the method comprises the steps of,

The processor is configured to obtain an edge UE from a UE of an indoor cell covered by the indoor substation, where the edge UE includes a reference UE and a reference UE, obtain an interference subband from a downlink subband of the indoor substation according to a subband CQI reported by the reference UE, generate a subband interference pattern according to the interference subband, allocate downlink data transmission resources to the reference UE according to the subband interference pattern and a full-band CQI reported by the reference UE, and allocate downlink data transmission resources to the reference UE according to the subband interference pattern and the full-band CQI reported by the reference UE, respectively;

13. An apparatus for eliminating interference is applied to a UE, where the UE is located in an edge area of an indoor cell covered by a cell substation and is adjacent to an outdoor cell covered by a macro station, and the cell substation and the macro station are co-channel networked, and the apparatus comprises: a processor and a transceiver; it is characterized in that the method comprises the steps of,

14. A communication device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; it is characterized in that the method comprises the steps of,

the processor being configured to read a program in a memory to perform the steps of the method of cancelling interference according to any of claims 1-5 or to perform the steps of the method of cancelling interference according to claim 6 or 7.

15. A readable storage medium storing a program, characterized in that the program, when executed by a processor, implements the steps of the method of cancelling interference according to any one of claims 1-5, or the steps of the method of cancelling interference according to claim 6 or 7.