CN114599049A - Method, device, system, new air interface base station and terminal for eliminating co-channel interference - Google Patents

Abstract

The present disclosure relates to a method, device, system, new air interface base station and terminal for eliminating co-channel interference, and relates to the technical field of communications. The elimination method includes: the first NR base station receives CRS and subframe related information sent by the LTE base station through the relay node, and the LTE base station and the second NR base station are co-located and deployed; the first NR base station generates interference cancellation information according to the relevant information; The first NR base station sends the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability cancels the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information.

Description

Method, device, system, new air interface base station and terminal for eliminating co-channel interference

technical field

The present disclosure relates to the field of communication technologies, and in particular, to a method for eliminating co-channel interference, a device for eliminating co-channel interference, a system for eliminating co-channel interference, a new air interface base station, a terminal, and a non-volatile computer-readable storage medium.

Background technique

In the process of 5G network deployment, the low-band LTE (Long Term Evolution, long-term evolution) spectrum needs to consider the re-farming to NR (New Radio, new air interface).

However, a lot of LTE spectrum is still used to carry data services, and the network load is relatively heavy, which makes it difficult to implement re-farming. For example, there is a scenario in which LTE and NR use the same frequency for adjacent deployment, that is, NR is deployed in a deployment area without LTE-related frequencies, and uses the same frequency as LTE.

In the design process of the NR system, long-term transmission pilot signals similar to CRS are not used, but CSI-RS signals with longer transmission time are used. Therefore, the neighbor cell interference of NR is relatively small.

However, the current test results show that the CRS of LTE interferes greatly with the NR system, and the NR system does not have a corresponding CRS cancellation mechanism in the current specification.

Moreover, in the current Xn Setup process and the gNB Configuration Update process, the included E-UTRAN (Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network, Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network) neighbor relationship does not have any Configuration information about CRS (Cell Reference Signal, cell reference signal).

In the related art, the LTE system has introduced a variety of methods for eliminating the CRS of neighboring cells since Rel-11. The basic methods are as follows: interference elimination methods based on reducing transmission power or reducing transmission, such as eICIC (eICIC (eICIC) in Rel-11) Enhanced Inter Cell Interference Coordination (Enhanced Inter Cell Interference Coordination) in the ABS (Almost Blank Subframe, all-blank subframe) method; the interference elimination method of the advanced receiver can be based on MMSE-IRC (Minimum Mean Squared Error-Interference Rejection Combining, Minimum mean square error-interference suppression combination) detection to achieve interference cancellation, such as NACIS (Network assistance Interference Cancellation and Suppression) technology introduced for LTE in Rel-14 and Rel-15; based on synchronization information way of eliminating interference.

SUMMARY OF THE INVENTION

The inventors of the present disclosure have found the following problems in the above-mentioned related technologies: lack of interfaces and information acquisition means between the LTE base station and the NR base station, so that the information about CRS and subframes is lacking in the neighbor cell information exchanged by NR, resulting in the terminal being unable to obtain interference cancellation. information to eliminate co-channel interference for LTE and NR.

In view of this, the present disclosure proposes a technical solution for eliminating co-channel interference, which can eliminate the co-channel interference of LTE and NR.

According to some embodiments of the present disclosure, a method for eliminating co-channel interference is provided, which is performed by a first NR base station, including: the first NR base station receives CRS and subframe related information sent by an LTE base station through a relay node, and the LTE The base station and the second NR base station are deployed at the same site; the first NR base station generates interference cancellation information according to the relevant information; the first NR base station sends the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability can cancel the LTE base station according to the interference cancellation information Co-channel interference to the second NR base station.

In some embodiments, the CRS and subframe related information is generated by the LTE base station and sent to the second NR base station deployed with it, and then sent to the first NR base station by the second NR base station serving as a relay node.

In some embodiments, the CRS and subframe related information is used by the second NR base station as part of the LTE neighbor information through an interface setup request (such as Xn Setup Request) or a radio access network configuration update request (such as NG-RANConfiguration Update Request) ) message is sent to the first NR base station.

In some embodiments, the generation of the interference cancellation information by the first NR base station according to the relevant information includes: the first NR base station obtains the set of interfering cells determined according to the inter-system measurement results of each terminal, and the interference strength of the cells in the set of interfering cells is greater than that of the interference cells. Threshold; the first NR base station generates interference cancellation information according to the set of interfering cells and related information.

In some embodiments, acquiring the set of interfering cells determined by the first NR base station according to the inter-system measurement results of each terminal includes: the first NR base station determining the first NR according to the inter-system measurement results reported by multiple terminals configured by the network management or stored The cell interference source of the LTE base station received by the base station; the set of interfering cells is determined according to the interference strength of each cell interference source.

In some embodiments, acquiring the set of interfering cells determined by the first NR base station according to the inter-system measurement results of each terminal includes: the first NR base station instructing each terminal to perform inter-system measurement on the LTE base stations deployed by each co-site, so that each terminal can report The set of interfering cells determined according to the measurement results of different systems.

In some embodiments, the first NR base station instructing each terminal to perform inter-system measurement on the co-located LTE base station includes: in the case where the terminal supports SFTD (SFN and Frame boundary Timing Difference, system frame number and frame timing difference) measurement Next, the terminal is instructed to perform SFTD measurement on at least one LTE cell in the set of interfering cells to obtain timing offsets of these LTE cells.

In some embodiments, the first NR base station sending the interference cancellation information to the terminal side includes: the first NR base station broadcasts the interference cancellation information through SIB1 (System Information Type 1, system information block 1), so as to support the terminal with interference cancellation capability CRS interference in the received information is eliminated according to the interference cancellation information, and the received information includes at least one item of random process downlink information, paging, and other broadcast information other than SIB1.

In some embodiments, the terminal supporting the interference cancellation capability eliminates the co-channel interference by the following steps: determining the original transmitted signal of each CRS on the RE (Resource Element, resource element) symbol according to the interference cancellation information; The CRS signal of each interfering cell is restored; the CRS signal of the corresponding interfering cell is eliminated from the received signal.

In some embodiments, the terminal supporting the interference cancellation capability restores the CRS signal of each interfering cell through the following steps: performing channel estimation on each antenna of the terminal, and determining the covariance matrix of each channel estimation result; The covariance matrix is used to determine each receiving matrix; the CRS signal of each interfering cell is restored according to each receiving matrix.

In some embodiments, the reception by the first NR base station of the cell reference signal CRS and the related information of the subframes sent by the LTE base station through the relay node includes: the first NR base station instructs each terminal to perform inter-system measurement on the LTE base stations deployed by each co-site. The first NR base station sends the request information of the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station according to the different system measurement results of each terminal; the first NR base station obtains the CRS and the subframe according to the response information of the relay node. related information.

In some embodiments, the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station includes: the first NR base station determines the connection mode of the corresponding LTE base station according to the network management configuration information; Relay nodes and their corresponding request information.

In some embodiments, sending the request information for the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station includes: in the case that the relay node is an AMF (Authentication Management Function, authentication management function) entity, by cross-core The web message sends the request message to the AMF entity.

In some embodiments, the request information sent to the AMF entity includes the base station identifier of the corresponding LTE base station, the TAC (Tracking Area Code, tracking area code) information of the corresponding LTE base station, the base station identifier of the first NR base station, the first NR base station TAC information supported by the base station and a list of requested cells, where each cell information in the requested cell list includes at least one item of requested CRS configuration information, subframe configuration information, and a corresponding LTE cell identifier.

In some embodiments, sending the request information for the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station includes: when the relay node is an authentication management function AMF entity, the first NR base station generates corresponding request information Send to the AMF entity; the response information is obtained through the following steps: the AMF entity sends the request information to the corresponding mobility management MME entity; the MME entity generates the request content information according to the identification of the corresponding LTE base station and sends it to the corresponding LTE base station; LTE The base station generates response information according to the request content information and forwards it to the AMF entity; the AMF entity sends the response information to the first NR base station.

In some embodiments, the request content information includes the base station identifier of the first NR base station, the TAC information of the first NR base station, and the specific request content, and the response information includes the base station identifier of the corresponding LTE base station, the TAC information of the corresponding LTE base station, the first The base station identifier of an NR base station, the TAC information supported by the first NR base station, and the configuration message corresponding to the request.

In some embodiments, sending the request information for the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station includes: in the case that the relay node is the second NR base station, using the radio access network in the Xn interface message A node configuration update (eg, NG-RAN NODE CONFIGURATION UPDATE) message sends a request message to the second NR base station.

In some embodiments, the request message sent to the second NR base station includes a request cell list, and each cell information in the request cell list includes at least one of requested CRS configuration information, subframe configuration information, and corresponding LTE Cell ID.

In some embodiments, the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station includes: if the relay node is the second NR base station, the first NR base station will generate corresponding request information Send to the second NR base station; the response information is obtained through the following steps: the second NR base station determines the relevant information of the CRS and subframe of the corresponding LTE base station according to the request information; the second NR base station passes the radio access network node in the Xn interface message The E-URAN neighbor cell configuration information in the configuration update response (NG-RAN NODE CONFIGURATION UPDATE RESPONSE) sends the relevant information as response information to the first NR base station.

In some embodiments, the cancellation method further includes: the first NR base station receives and saves capability information that supports interference cancellation sent by the terminal through the AMF entity; wherein, the first NR base station sends the interference cancellation information to the terminal side including: a first The NR base station sends the interference cancellation information to the terminal supporting the interference cancellation capability through an RRC (Radio Resource Control, Radio Resource Control) connection reconfiguration message according to the stored capability information.

In some embodiments, the RRC connection reconfiguration message includes PCI (Physical Cell ID, physical cell identifier) information of LTE, CRS port type, downlink frequency, downlink bandwidth, and CRS pattern, and the RRC connection reconfiguration message also includes multicast/ At least one item of multicast single frequency network MBSFN subframe configuration, all-blank subframe ABS subframe configuration, and time offset.

In some embodiments, a terminal supporting interference cancellation capability eliminates co-channel interference by the following steps: when the received signal is not an MBSFN subframe, the terminal performs CRS interference cancellation according to the interference cancellation information; when the received signal is an MBSFN subframe In this case, the terminal does not perform CRS interference cancellation on the neighboring cell; when the received signal is an ABS subframe, the terminal skips the CRS interference cancellation processing in the ABS subframe.

In some embodiments, the related information of CRS and subframe includes LTE PCI information, LTE cell identifier, CRS port type, downlink frequency, downlink bandwidth, CRS pattern, and also includes MBSFN subframe configuration, ABS subframe configuration, time offset in At least one of, the interference cancellation information includes an interference cancellation enable indication, an interference cell set configuration list, and each cell configuration information in the interference cell set configuration list includes the PCI, downlink frequency, downlink bandwidth, and CRS pattern of the cell, and also includes a positioning reference. , at least one of MBSFN subframe configuration and ABS subframe configuration.

In some embodiments, the cancellation method further includes: in the case that the terminal does not support the interference cancellation capability but supports the DSS (Dynamic Spectrum Sharing, dynamic spectrum sharing) capability, the first NR base station according to the capability of the terminal, the CRS and the subframe Relevant information, determine the LTE cell with the strongest interference, and the relevant information includes CRS pattern, downlink frequency, downlink bandwidth, and MBSFN subframe configuration; the first NR base station performs RB (Resource Block, resource block) on the LTE cell for the terminal. Class rate configuration to eliminate co-channel interference for the terminal.

According to other embodiments of the present disclosure, a method for eliminating co-channel interference is provided, which is performed by a terminal, including: the terminal receiving interference cancellation information sent by a first NR base station, where the interference cancellation information is the first NR base station according to the received LTE The base station generates the CRS and subframe related information sent by the relay node; the terminal eliminates the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information, and the LTE base station and the second NR base station are co-located.

In some embodiments, the cancellation method further includes: the terminal performs inter-system measurement on the LTE base stations deployed in each co-site, so as to determine a set of interfering cells, where the interference strength of the cells in the set of interfering cells is greater than an interference threshold; wherein, the interference cancellation information Generated for the first NR base station according to the interference cell set and related information.

In some embodiments, the elimination method further includes: the terminal sends the inter-system measurement result to the first NR base station, so that the first NR base station determines, according to the inter-system measurement result configured by the network management or the stored inter-system measurement result reported by the terminal, that the first NR base station receives Cell interference sources of the LTE base station, and then determine the set of interfering cells according to the interference strength of each cell interference source.

In some embodiments, the elimination method further includes: according to the instruction of the first NR base station, the terminal performs inter-system measurement on the LTE base stations deployed by each co-site; the terminal determines the set of interfering cells according to the inter-system measurement result; A set of interfering cells is sent.

In some embodiments, the terminal performing inter-system measurement on the LTE base stations deployed in each co-site includes: in the case where SFTD measurement is supported, according to the instruction of the first NR base station, the terminal performs SFTD on at least one LTE cell in the set of interfering cells measurement to obtain and report the timing offsets of these LTE cells to the first NR base station.

In some embodiments, the terminal receiving the interference cancellation information sent by the first NR base station includes: the terminal receiving the interference cancellation information broadcast by the first NR base station through SIB1; The frequency interference includes: the terminal cancels the CRS interference in the received information according to the interference cancellation information, and the received information includes at least one of random process downlink information, paging, and other broadcast information other than SIB1.

In some embodiments, removing the co-channel interference from the LTE base station to the second NR base station by the terminal according to the interference cancellation information includes: the terminal determines, according to the interference cancellation information, the original transmitted signal of each CRS on the RE symbols of the resource particles; The channel estimation result of the original transmitted signal restores the CRS signal of each interfering cell; the terminal removes the CRS signal of the corresponding interfering cell from the received signal.

In some embodiments, restoring the CRS signal of each interfering cell by the terminal according to the channel estimation result of each original transmitted signal includes: the terminal performs channel estimation on each of its antennas, and determines the covariance matrix of each channel estimation result; The estimation result and its covariance matrix determine each receiving matrix; the terminal restores the CRS signal of each interfering cell according to each receiving matrix.

In some embodiments, the elimination method further includes: according to the instruction of the first NR base station, the terminal performs inter-system measurement on the LTE base stations deployed in each co-site; the terminal sends the inter-system measurement result to the first NR base station, so that the first NR The base station sends request information for CRS and subframe related information to the relay node of the corresponding LTE base station according to the inter-system measurement result, and obtains CRS and subframe related information according to the response information of the relay node.

In some embodiments, the cancellation method further includes: the terminal sends the capability information supporting interference cancellation to the first NR base station through the AMF entity; wherein, the terminal receiving the interference cancellation information sent by the first new air interface NR base station includes: the terminal receiving the first NR base station. The NR base station transmits the interference cancellation information sent by the RRC connection reconfiguration message according to the stored capability information.

In some embodiments, canceling the co-channel interference of the LTE base station to the second NR base station by the terminal according to the interference cancellation information includes: when the received signal is not an MBSFN subframe, the terminal performs CRS interference cancellation according to the interference cancellation information; When the signal is an MBSFN subframe, the terminal does not perform CRS interference cancellation on neighboring cells; when the received signal is an ABS subframe, the terminal skips the CRS interference cancellation process for the ABS subframe.

According to further embodiments of the present disclosure, a new air interface base station is provided. As a first NR base station, the new air interface base station includes: a receiving unit configured to receive a cell reference signal CRS and subframe related information sent by an LTE base station through a relay node , the LTE base station and the second NR base station are co-located and deployed; the processing unit is used to generate interference cancellation information according to the relevant information; the sending unit is used to send the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability can cancel the interference according to the interference cancellation information. The information eliminates the co-channel interference of the LTE base station to the second NR base station.

In some embodiments, the CRS and subframe related information is generated by the LTE base station and sent to the second NR base station deployed with it, and then sent to the first NR base station by the second NR base station serving as a relay node.

In some embodiments, the CRS and subframe related information is used by the second NR base station as part of the LTE neighbor cell information through an interface setup request (Xn Setup Request) or a radio access network configuration update request (NG-RANConfiguration Update Request) message sent to the first NR base station.

In some embodiments, the processing unit obtains the set of interfering cells determined according to the inter-system measurement results of each terminal, the interference strength of the cells in the set of interfering cells is greater than the interference threshold; and the interference cancellation information is generated according to the set of interfering cells and related information.

In some embodiments, the processing unit determines the cell interference source of the LTE base station received by the first NR base station according to the inter-system measurement results reported by multiple terminals configured by the network management or stored; and determines the interference cell according to the interference strength of each cell interference source gather.

In some embodiments, the processing unit instructs each terminal to perform inter-system measurement on the LTE base stations deployed at each co-site, so that each terminal reports the set of interfering cells determined according to the inter-system measurement result.

In some embodiments, when the terminal supports SFTD measurement, the processing unit instructs the terminal to perform SFTD measurement on at least one LTE cell in the set of interfering cells to obtain timing offsets of these LTE cells.

In some embodiments, the sending unit broadcasts the interference cancellation information through the system information block SIB1, so that the terminal supporting the interference cancellation capability cancels the CRS interference in the received information according to the interference cancellation information, and the received information includes the random process downlink information, paging, SIB1 At least one item of other broadcast information other than .

In some embodiments, the terminal supporting the interference cancellation capability eliminates the co-channel interference by the following steps: determining the original transmitted signal of each CRS on the RE symbol of the resource element according to the interference cancellation information; according to the channel estimation result of each original transmitted signal, The CRS signal of each interfering cell is restored; the CRS signal of the corresponding interfering cell is eliminated from the received signal.

In some embodiments, the terminal supporting the interference cancellation capability restores the CRS signal of each interfering cell through the following steps: performing channel estimation on each antenna of the terminal, and determining the covariance matrix of each channel estimation result; The covariance matrix is used to determine each receiving matrix; the CRS signal of each interfering cell is restored according to each receiving matrix.

In some embodiments, the processing unit instructs each terminal to perform inter-system measurement on the LTE base stations deployed by each co-site; the sending unit transmits the correlation between the CRS and the subframe to the relay node of the corresponding LTE base station according to the inter-system measurement result of each terminal Information request information; the processing unit obtains the relevant information of the CRS and the subframe according to the response information of the relay node.

In some embodiments, the processing unit determines the connection mode of the corresponding LTE base station according to the network management configuration information; and determines the relay node and its corresponding request information according to the connection mode.

In some embodiments, when the relay node is an AMF entity, the sending unit sends the request message to the AMF entity through a cross-core network message.

In some embodiments, the request information sent to the AMF entity includes the base station identity of the corresponding LTE base station, the TAC information of the corresponding LTE base station, the base station identity of the first NR base station, the TAC information supported by the first NR base station, and the requesting cell list, and each cell information in the requested cell list includes at least one item of requested CRS configuration information, subframe configuration information, and a corresponding LTE cell identifier.

In some embodiments, when the relay node is an AMF entity, the sending unit sends the generated corresponding request information to the AMF entity; the response information is obtained through the following steps: the AMF entity sends the request information to the corresponding MME entity; The MME entity generates request content information according to the identification of the corresponding LTE base station and sends it to the corresponding LTE base station; the LTE base station generates response information according to the request content information and forwards it to the AMF entity; the AMF entity sends the response information to the first NR base station .

In some embodiments, the request content information includes the base station identifier of the first NR base station, the TAC information of the first NR base station, and the specific request content, and the response information includes the base station identifier of the corresponding LTE base station, the TAC information of the corresponding LTE base station, the first The base station identifier of an NR base station, the TAC information supported by the first NR base station, and the configuration message corresponding to the request.

In some embodiments, when the relay node is the second NR base station, the sending unit sends the request message to the second NR base station through the radio access network node configuration update message (such as NG-RAN NODE CONFIGURATION UPDATE) in the Xn interface message Two NR base stations.

In some embodiments, the request message sent to the second NR base station includes a request cell list, and each cell information in the request cell list includes at least one of requested CRS configuration information, subframe configuration information, and corresponding LTE Cell ID.

In some embodiments, when the relay node is the second NR base station, the sending unit generates corresponding request information and sends it to the second NR base station; the response information is obtained by the following steps: the second NR base station determines according to the request information Information about the CRS and subframes of the corresponding LTE base station; the second NR base station uses the E-URAN neighbor configuration information in the radio access network node configuration update response (such as NG-RAN NODE CONFIGURATION UPDATE RESPONSE) in the Xn interface message to The relevant information is sent to the first NR base station as response information.

In some embodiments, the receiving unit receives and saves the capability information of supporting interference cancellation sent by the terminal through the AMF entity; the transmitting unit sends the interference cancellation information to the supporting interference through the RRC connection reconfiguration message according to the saved capability information. Eliminate the ability of the terminal.

In some embodiments, the RRC connection reconfiguration message includes PCI information of LTE, CRS port type, downlink frequency, downlink bandwidth, and CRS pattern, and the RRC connection reconfiguration message also includes multicast/multicast single frequency network MBSFN subframe configuration , at least one of all-blank subframe ABS subframe configuration, and time offset.

In some embodiments, a terminal supporting interference cancellation capability eliminates co-channel interference by the following steps: when the received signal is not an MBSFN subframe, the terminal performs CRS interference cancellation according to the interference cancellation information; when the received signal is an MBSFN subframe In this case, the terminal does not perform CRS interference cancellation on the neighboring cell; when the received signal is an ABS subframe, the terminal skips the CRS interference cancellation processing in the ABS subframe.

In some embodiments, the related information of CRS and subframe includes LTE PCI information, LTE cell identifier, CRS port type, downlink frequency, downlink bandwidth, CRS pattern, and also includes MBSFN subframe configuration, ABS subframe configuration, time offset in At least one item, the interference cancellation information includes an interference cancellation enable indication, an interference cell set configuration list, and each cell configuration information in the interference cell set configuration list includes the PCI, downlink frequency, downlink bandwidth, and CRS pattern of the cell, and also includes a positioning reference. , at least one of MBSFN subframe configuration and ABS subframe configuration.

In some embodiments, in the case that the terminal does not support the interference cancellation capability but supports the DSS capability, the processing unit determines the LTE cell with the strongest interference according to the capability of the terminal, the relevant information of the CRS and subframes, and the relevant information includes the CRS pattern , downlink frequency, downlink bandwidth, and MBSFN subframe configuration, and the processing unit performs RB-level rate configuration for the LTE cell for the terminal to eliminate co-channel interference for the terminal.

According to further embodiments of the present disclosure, a terminal is provided, including: a receiving unit configured to receive interference cancellation information sent by a first NR base station, where the interference cancellation information is that the first NR base station passes through a relay node according to the received LTE base station The related information of the sent CRS and subframes is generated; the processing unit is used for eliminating the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information, and the LTE base station and the second NR base station are co-located.

In some embodiments, the processing unit performs inter-system measurement on the LTE base stations deployed in each co-site to determine the set of interfering cells, where the interference strength of the cells in the set of interfering cells is greater than the interference threshold, and the interference cancellation information is the first NR base station according to Interfering cell set and related information generation.

In some embodiments, the terminal further includes a sending unit, configured to send the inter-system measurement result to the first NR base station, so that the first NR base station determines the first NR base station according to the inter-system measurement result configured by the network management or the stored inter-system measurement result reported by the terminal The received cell interference source of the LTE base station, and then according to the interference strength of each cell interference source, the set of interference cells is determined.

In some embodiments, the processing unit performs inter-system measurement on the LTE base stations deployed by each co-site according to the instruction of the first NR base station; determines the set of interfering cells according to the measurement result of the inter-system; the sending unit sends the set of interfering cells to the first NR base station .

In some embodiments, in the case of supporting SFTD measurement, according to the instruction of the first NR base station, the processing unit performs SFTD measurement on at least one LTE cell in the set of interfering cells, so as to obtain and report these LTE cells to the first NR base station timing deviation.

In some embodiments, the receiving unit receives the interference cancellation information broadcast by the first NR base station through SIB1; the processing unit cancels the CRS interference in the received information according to the interference cancellation information, and the received information includes random process downlink information, paging, other than SIB1 At least one item of broadcast information.

In some embodiments, the processing unit determines the original transmitted signal of each CRS on the RE symbol according to the interference cancellation information; the processing unit restores the CRS signal of each interfering cell according to the channel estimation result of each original transmitted signal; The CRS signal of the corresponding interfering cell is eliminated from the signal.

In some embodiments, the processing unit performs channel estimation for each of its antennas, and determines the covariance matrix of each channel estimation result; the processing unit determines each receiving matrix according to each channel estimation result and its covariance matrix; matrix to restore the CRS signal of each interfering cell.

In some embodiments, according to the instruction of the first NR base station, the processing unit performs inter-system measurement on the LTE base stations deployed in each co-site; Based on the system measurement result, the request information of the relevant information of the CRS and the subframe is sent to the relay node of the corresponding LTE base station, and the relevant information of the CRS and the subframe is obtained according to the response information of the relay node.

In some embodiments, the sending unit sends the capability information supporting interference cancellation to the first NR base station through the AMF entity; the receiving unit receives the interference cancellation information sent by the first NR base station through the RRC connection reconfiguration message according to the saved capability information, the sending unit .

In some embodiments, when the received signal is not an MBSFN subframe, the processing unit performs CRS interference cancellation according to the interference cancellation information; when the received signal is an MBSFN subframe, the processing unit does not perform CRS interference cancellation on neighboring cells; When the received signal is an ABS subframe, the processing unit skips the CRS interference cancellation process of the ABS subframe.

According to further embodiments of the present disclosure, a system for eliminating co-channel interference is provided, including: a new air interface base station, which is used as a first NR base station to perform the method for eliminating co-channel interference on the base station side in any one of the foregoing embodiments; The terminal is configured to perform the method for eliminating co-channel interference on the terminal side in any of the foregoing embodiments; the relay node is configured to forward the CRS and subframe related information sent by the LTE base station to the first NR base station, and the LTE base station communicates with the first NR base station. The second NR base station is co-located.

In some embodiments, the relay node is an AMF entity, and sends the request information of the CRS and subframe related information sent by the first NR base station to the corresponding MME entity, and the MME entity generates the request content according to the identification of the corresponding LTE base station The information is sent to the corresponding LTE base station, and the LTE base station generates response information according to the request content information and forwards it to the AMF entity, and the AMF entity sends the response information to the first NR base station.

In some embodiments, the relay node is the second NR base station, and determines the CRS and subframe related information of the corresponding LTE base station according to the request information for the CRS and subframe related information sent by the first NR base station, and uses the Xn interface message. The E-URAN neighbor cell configuration information in the radio access network node configuration update response (such as NG-RAN NODE CONFIGURATION UPDATE RESPONSE) in the RAN sends the relevant information as response information to the first NR base station.

According to further embodiments of the present disclosure, there is provided an apparatus for eliminating co-channel interference, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute any one of the foregoing based on instructions stored in the memory device The method for eliminating co-channel interference in the embodiment.

According to further embodiments of the present disclosure, there is provided a non-volatile computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the method for eliminating co-channel interference in any one of the foregoing embodiments .

In the above embodiment, the NR base station obtains the relevant information of the CRS and subframes through the relay node between the LTE base station and the LTE base station to generate interference cancellation information, and sends the interference cancellation information to the terminal side for cancellation of co-channel interference. In this way, the terminal can eliminate the co-channel interference of LTE and NR based on the interference cancellation information delivered by the network side.

Description of drawings

The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings:

1 shows a flowchart of some embodiments of the method for eliminating co-channel interference of the present disclosure;

2 shows a flowchart of other embodiments of the method for eliminating co-channel interference of the present disclosure;

3 shows a signaling diagram of some embodiments of the method for eliminating co-channel interference of the present disclosure;

4a shows a signaling diagram of other embodiments of the method for eliminating co-channel interference of the present disclosure;

Figure 4b shows a signaling diagram of other embodiments of the method for eliminating co-channel interference of the present disclosure;

4c shows a signaling diagram of other embodiments of the method for eliminating co-channel interference of the present disclosure;

5 shows a schematic diagram of some embodiments of the method for eliminating co-channel interference of the present disclosure;

6 illustrates a block diagram of some embodiments of the new air interface base station of the present disclosure;

7 illustrates a block diagram of some embodiments of the terminal of the present disclosure;

8 shows a block diagram of some embodiments of the co-channel interference cancellation apparatus of the present disclosure;

9 shows a block diagram of other embodiments of the co-channel interference cancellation apparatus of the present disclosure;

10 illustrates a block diagram of some embodiments of the co-channel interference cancellation system of the present disclosure.

Detailed ways

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Meanwhile, it should be understood that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses in any way.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods, and apparatus should be considered part of the authorized description.

In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

As mentioned above, the method of reducing transmission power or reducing transmission will cause some downlink resources to be unavailable for ordinary terminals, resulting in reduced system performance. Moreover, since the LTE FDD (Frequency Division Duplexing, Frequency Division Duplexing) system uses frequency synchronization instead of time synchronization in the existing network, the method based on synchronization information needs to accurately obtain the timing deviation between the remaining NRFDDs.

That is to say, in the process of 5G network deployment, in order to eliminate CRS interference from LTE, the current 5G protocol still has the following defects.

The terminal side lacks CRS related auxiliary information of LTE. Although it is on the same frequency as LTE, the terminal is usually unable to perform inter-system measurements on neighboring cells at the same time, and needs to measure the GAP (gap). In addition, the LTE FDD system usually adopts frequency synchronization instead of time synchronization. Therefore, the LTE FDD system and the NR FDD system in neighboring cells may not be synchronized, resulting in the terminal being unable to accurately estimate the position of the LTE CRS.

There is a lack of interfaces and acquisition means between the LTE base station and the NR base station. In the LTE system, CRS configuration information (including the number of ports, MBSFN subframe configuration, etc.) is usually exchanged through the X2 interface. However, in the SA (Standalone Networking) scenario, information cannot be exchanged between LTE and NR through an interface, and NR cannot automatically obtain information in an effective manner.

In addition, considering the current interface interaction process, the sender's neighbor cell configuration information defined in the protocol is optional. If it is not sent to the target side, the target side cannot configure the corresponding interference algorithm according to the neighbor cell configuration information.

The CRS and subframe configuration information of the LTE neighbor cells are missing in the neighbor cell information exchanged by NR. Currently, in the Xn interface, an E-UTRAN cell as a neighbor can be interacted with an NR neighbor. However, there are only a few configuration information of frequency points in the current protocol, and the relevant configuration information about the CRS port and frame structure is lacking. Therefore, the NR base station cannot obtain valid information of the LTE base station.

The terminal has no relevant interference cancellation information during idle and initial connection establishment. Because in the idle state and the random access process, the terminal can only obtain the relevant configuration information from the broadcast message. In addition, the complete synchronization with the network has not yet been performed, so the related interference cancellation configurations and methods are lacking.

Based on the analysis of the above requirements and reasons, the current 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) LTE and NR protocols cannot meet the requirements, and new methods need to be enhanced to meet the requirements of network deployment and optimization.

Therefore, in view of the interference of LTE CRS to NR in LTE and NR co-channel deployment scenarios, the terminal of the present disclosure can eliminate CRS interference from LTE cells based on the auxiliary information delivered by the network side, thereby reducing co-channel interference from neighboring cells. , to improve the throughput of the terminal and the system and improve the user experience. For example, the technical solutions of the present disclosure can be implemented through the following embodiments.

FIG. 1 shows a flowchart of some embodiments of the co-channel interference cancellation method of the present disclosure.

As shown in FIG. 1 , for the base station side, in step 110, the first NR base station receives the CRS and subframe related information sent by the LTE base station through the relay node. The LTE base station and the second NR base station are co-located and deployed.

For example, CRS and subframe related information includes LTE PCI information, LTE cell identifier, CRS port type, downlink frequency, downlink bandwidth, CRS pattern, and also includes at least one of MBSFN subframe configuration, ABS subframe configuration, and time offset .

In some embodiments, the technical solutions of the present disclosure can assist the terminal to perform interference cancellation in two ways: network-side assistance based on public signaling configuration for interference cancellation; and network-side assistance for interference cancellation based on dedicated signaling configuration.

In some embodiments, for the way of using common signaling, the related information of CRS and subframe is generated by the LTE base station and sent to the second NR base station deployed with it, and then sent by the second NR base station serving as a relay node to the second NR base station. The first NR base station.

For example, the CRS and subframe related information is sent by the second NR base station to the first NR base station through an XnSetup Request or NG-RAN Configuration Update Request message as part of the LTE neighbor cell information. The first NR base station generates interference cancellation information according to the interference cell set and related information.

The first NR base station instructs each terminal to perform inter-system measurement on the LTE base stations deployed by each co-site;

In some embodiments, for the way of using dedicated signaling, the first NR base station sends request information for CRS and subframe related information to the relay node of the corresponding LTE base station according to the inter-system measurement results of each terminal; the first NR The base station obtains the relevant information of the CRS and the subframe according to the response information of the relay node.

For example, the first NR base station determines the connection mode of the corresponding LTE base station according to the network management configuration information; and determines the relay node and its corresponding request information according to the connection mode.

In some embodiments, when the relay node is an AMF entity, the request message is sent to the AMF entity through a cross-core network message.

For example, the request information sent to the AMF entity includes the base station identity of the corresponding LTE base station, the TAC information of the corresponding LTE base station, the base station identity of the first NR base station, the TAC information supported by the first NR base station, and the request cell list. Each cell information in the requested cell list includes at least one item of requested CRS configuration information, subframe configuration information, and a corresponding LTE cell identifier.

In some embodiments, when the relay node is an AMF entity, the first NR base station generates corresponding request information and sends it to the AMF entity.

The response information is obtained through the following steps: the AMF entity sends the request information to the corresponding MME entity; the MME entity generates request content information according to the identification of the corresponding LTE base station and sends it to the corresponding LTE base station; the LTE base station generates a response according to the request content information The information is forwarded to the AMF entity; the AMF entity sends the response information to the first NR base station.

For example, the request content information includes the base station identifier of the first NR base station, the TAC information of the first NR base station, and the specific request content. The response information includes the base station identifier of the corresponding LTE base station, the TAC information of the corresponding LTE base station, the base station identifier of the first NR base station, the TAC information supported by the first NR base station, and the configuration message corresponding to the request.

In some embodiments, when the relay node is the second NR base station, the request message is sent to the second NR base station through the Xn interface message NG-RANNODE CONFIGURATION UPDATE.

For example, the request message sent to the second NR base station includes the request cell list. Each cell information in the requested cell list includes at least one item of requested CRS configuration information, subframe configuration information, and a corresponding LTE cell identifier.

In some embodiments, when the relay node is the second NR base station, the first NR base station sends corresponding request information to the second NR base station.

The response information is obtained through the following steps: the second NR base station determines the CRS and subframe related information of the corresponding LTE base station according to the request information; the second NR base station uses the Xn interface message NG-RAN NODE CONFIGURATIONUPDATE RESPONSE E-URAN neighbor The zone configuration information sends the relevant information as response information to the first NR base station.

In step 120, the first NR base station generates interference cancellation information according to the relevant information. For example, the interference cancellation information includes the interference cancellation enable indication, the interference cell set configuration list, and the configuration information of each cell in the interference cell set configuration list includes the PCI, downlink frequency, downlink bandwidth, and CRS pattern of the cell, as well as positioning reference, MBSFN sub-system. At least one of frame configuration and ABS subframe configuration.

In some embodiments, the first NR base station obtains the set of interfering cells determined according to the inter-system measurement results of each terminal. The interference strength of the cells in the set of interfering cells is greater than the interference threshold;

In some embodiments, for the way of using public signaling, the first NR base station determines the cell interference source of the LTE base station received by the first NR base station according to the network management configuration or the stored inter-system measurement results reported by multiple terminals; The set of interfering cells is determined according to the interference strength of the interference sources of each cell.

In some embodiments, for the way of using dedicated signaling, the first NR base station instructs each terminal to perform inter-system measurement on the LTE base stations deployed by each co-site, so that each terminal reports the set of interfering cells determined according to the inter-system measurement result.

For example, in the case that the terminal supports SFTD measurement, the terminal is instructed to perform SFTD measurement on at least one LTE cell in the set of interfering cells, so as to obtain timing offsets of these LTE cells.

In step 130, the first NR base station sends the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability cancels the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information.

In some embodiments, the first NR base station may broadcast the interference cancellation information through SIB1, so that the terminal supporting the interference cancellation capability cancels the CRS interference in the received information according to the interference cancellation information. The received information includes at least one item of random process downlink information, paging, and other broadcast information other than SIB1.

In some embodiments, for the way of using dedicated signaling, the first NR base station receives and saves the capability information that supports interference cancellation sent by the terminal through the AMF entity; the first NR base station reconfigures through the RRC connection according to the saved capability information The message transmits interference cancellation information to terminals that support interference cancellation capabilities.

For example, the RRC connection reconfiguration message includes PCI information of LTE, CRS port type, downlink frequency, downlink bandwidth, and CRS pattern. The RRC connection reconfiguration message further includes at least one item of MBSFN subframe configuration, all-blank subframe ABS subframe configuration, and time offset.

In some embodiments, the terminal supporting the interference cancellation capability eliminates the co-channel interference by the following steps: determining the original transmitted signal of each CRS on the RE symbol according to the interference cancellation information; CRS signal of the interfering cell; cancel the CRS signal of the corresponding interfering cell from the received signal.

For example, perform channel estimation on each antenna of the terminal, and determine the covariance matrix of each channel estimation result; determine each receiving matrix according to each channel estimation result and its covariance matrix; restore the CRS signal of each interfering cell according to each receiving matrix .

In some embodiments, a terminal supporting interference cancellation capability eliminates co-channel interference by the following steps: when the received signal is not an MBSFN subframe, the terminal performs CRS interference cancellation according to the interference cancellation information; when the received signal is an MBSFN subframe In this case, the terminal does not perform CRS interference cancellation on the neighboring cell; when the received signal is an ABS subframe, the terminal skips the CRS interference cancellation processing in the ABS subframe.

In some embodiments, when the terminal does not support the interference cancellation capability but supports the DSS capability, the first NR base station determines the LTE cell with the strongest interference according to the terminal's capability, CRS and subframe related information. For example, the related information includes CRS pattern, downlink frequency, downlink bandwidth, and MBSFN subframe configuration. The first NR base station performs RB-level rate configuration on the LTE cell for the terminal to eliminate co-channel interference for the terminal.

FIG. 2 shows a flowchart of other embodiments of the method for eliminating co-channel interference of the present disclosure.

As shown in FIG. 2, for the terminal side, in step 210, the terminal receives the interference cancellation information sent by the first NR base station. The interference cancellation information is generated by the first NR base station according to the received CRS and subframe related information sent by the LTE base station through the relay node.

In some embodiments, the terminal receives the interference cancellation information broadcasted by the first NR base station through SIB1 for the manner of using common signaling.

In some embodiments, for the way of using dedicated signaling, the terminal sends the capability information supporting interference cancellation to the first NR base station through the AMF entity; the terminal receives the first NR base station according to the saved capability information and sends it through an RRC connection reconfiguration message interference cancellation information.

In some embodiments, for the manner of using common signaling, the terminal performs inter-system measurement on the LTE base stations deployed in each co-site, so as to determine the set of interfering cells. The interference strength of the cells in the set of interfering cells is greater than the interference threshold. The interference cancellation information is generated by the first NR base station according to the interference cell set and related information.

For example, the terminal sends the measurement result of the different system to the first NR base station, so that the first NR base station can determine the cell interference source of the LTE base station received by the first NR base station according to the configuration of the network management or the measurement result of the different system reported by the terminal; The interference strength of the interference source of each cell determines the set of interfering cells.

In some embodiments, for the way of using common signaling, according to the instruction of the first NR base station, the terminal performs inter-system measurement on the LTE base stations deployed in each co-site; the terminal sends the inter-system measurement result to the first NR base station, so that The first NR base station sends request information for CRS and subframe related information to the relay node of the corresponding LTE base station according to the inter-system measurement result; and obtains CRS and subframe related information according to the response information of the relay node.

In some embodiments, for the method of using dedicated signaling and the indication of the first NR base station, the terminal performs inter-system measurements on the LTE base stations deployed in each co-site; the terminal determines the set of interfering cells according to the inter-system measurement results; The NR base station transmits the set of interfering cells.

For example, in the case of supporting SFTD measurement, according to the instruction of the first NR base station, the terminal performs SFTD measurement on at least one LTE cell in the set of interfering cells to obtain and report the timing offset of these LTE cells to the first NR base station.

In step 220, the terminal cancels the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information. The LTE base station and the second NR base station are co-located and deployed.

In some embodiments, the terminal determines the original transmitted signal of each CRS on the RE symbol according to the interference cancellation information; the terminal restores the CRS signal of each interfering cell according to the channel estimation result of each original transmitted signal; the terminal receives the signal from The CRS signal of the corresponding interfering cell is eliminated.

For example, the terminal performs channel estimation on each of its antennas, and determines the covariance matrix of each channel estimation result; the terminal determines each receiving matrix according to each channel estimation result and its covariance matrix; the terminal restores each interference matrix according to the each receiving matrix CRS signal of the cell.

In some embodiments, for the manner of using common signaling, the terminal cancels CRS interference in the received information according to the interference cancellation information. The received information includes at least one item of random process downlink information, paging, and other broadcast information other than SIB1.

In some embodiments, for the way of using dedicated signaling, when the received signal is not an MBSFN subframe, the terminal performs CRS interference cancellation according to the interference cancellation information; when the received signal is an MBSFN subframe, the terminal does not The cell performs CRS interference cancellation; when the received signal is an ABS, the terminal skips the CRS interference cancellation process for the ABS.

In some embodiments, the main idea of network-assisted interference cancellation based on common signaling configuration is: the first base station generates interference for broadcast message transmission according to the CRS and subframe related information sent by the LTE base station through the relay node The configuration information is eliminated; after the terminal obtains the relevant information, the CRS interference cancellation is performed on the broadcast message and the downlink received data in the random access process; and the terminal notifies the network of its ability to support CRS interference cancellation after accessing the network. For example, network-assisted interference cancellation based on common signaling configuration can be implemented through the embodiment in FIG. 3 .

FIG. 3 shows a signaling diagram of some embodiments of the co-channel interference cancellation method of the present disclosure.

As shown in FIG. 3, in event 310, the LTE base station generates CRS and subframe related information of LTE. If there is a second NR base station deployed in a co-site, the related information of the CRS and the subframe is sent to the second NR base station.

For example, the related information of CRS and subframe may include LTE PCI information, LTE cell identity, CRS port type, downlink frequency, downlink bandwidth, CRS pattern, MBSFN subframe configuration (for example, the MBSFN subframe configuration is described in a period of 40ms) , the EUTRA-MBSFN-Subframe ConfigList defined in the related art, etc.), ABS subframe configuration (such as describing the situation where it is configured as an ABS subframe with a period of 40ms), time offset (if the time can be obtained, Then the result is given as the deviation from the reference time modulo the length of the SFN frame).

In event 320, the second NR base station as a relay node sends the CRS and subframe related information of the LTE cell as part of the LTE neighbor cell information to the first NR base station through an Xn Setup Request or NG-RAN Configuration UpdateRequest message.

In event 330, the first NR base station determines the source of interference from the LTE cell received by the second NR base station according to the configuration of the network management or the stored inter-system measurement results reported by multiple terminals. For example, cells whose interference is higher than a preset threshold may be added to the set of interference cells.

In event 340, the first NR base station generates interference cancellation information according to the set of interfering cells, and broadcasts it over the air interface through the SIB1 message.

For example, the interference cancellation information includes an interference cancellation enable indication (used to indicate in real time that a terminal capable of interference cancellation performs interference cancellation according to the following information), and an interference set configuration list.

The configuration information of each cell in the interference set configuration list includes the PCI of the cell, downlink frequency, downlink bandwidth (such as n6, n15, n25, n50, n75, n100, etc., the unit is the number of resource blocks RB), CRS pattern (such as v-shift defined in 3GPP related technologies), positioning reference (optional, the timing offset value from the local cell can be used), MBSFN subframe configuration (optional, such as describing the MBSFN subframe in a period of 40ms) In this case, the EUTRA-MBSFN-Subframe ConfigList defined in the related art can be used) and the ABS subframe configuration (optional, for example, the case where the ABS subframe is configured with a period of 40ms is described).

In event 350, after receiving the SIB1 message sent by the first NR base station, if the terminal supports the interference cancellation capability, when receiving the random process downlink message, receiving paging and receiving other SIB broadcast messages except SIB1, according to the network side The auxiliary information is used to cancel the CRS interference of the LTE neighboring cells.

In some embodiments, for each interfering cell, the terminal completes the generation of the target LTE CRS sequence according to the PCI and CRS pattern of the cell respectively; and determines the time-frequency position and carrier of the CRS according to the downlink bandwidth, downlink frequency and positioning reference position and determine the original transmitted signal on the RE symbol for each CRS. For example, the original transmitted signal of the jth receiving antenna of the terminal on the kth subcarrier and the lth symbol is d _j (k,l).

信道估计结果的协方差矩阵可以表示为：Then, perform channel estimation on the channel of the jth receiving antenna of the terminal at the kth subcarrier and the lth symbol, and the result is:

The covariance matrix of the channel estimation result can be expressed as:

P ₁ is the transmit power of the CRS of the target cell, which is equal to the received E[|d _j (k,l)| ² ], _Nsp is the sampling rate of the RE, N _BS is the number of antennas, and n(k,l) is noise.

Compute the receive matrix:

After restoration, the CRS signal of each interfering cell is:

The terminal can subtract the CRS signals of all interfered cells from the received signal, and then complete the detection result of the RE after removing the CRS interference signal by means of MMSE.

In some embodiments, the main idea of network-assisted interference cancellation based on dedicated signaling configuration is as follows: the first NR base station requests the LTE base station to obtain the CRS configuration information of the interfering LTE cell according to the measurement result of the terminal; The relay node sends other CRS-related configuration information and synchronization information; after acquiring the configuration information and synchronization information, the first NR base station sends the CRS configuration information and synchronization information of multiple LTE cells interfered by the second NR base station to The terminal; the terminal completes the interference cancellation scheme for determining the corresponding interference sources on different subframes based on the configuration information on the network side. For example, network-assisted interference cancellation based on dedicated signaling configuration can be implemented through the embodiment in FIG. 4 .

FIG. 4a shows a signaling diagram of other embodiments of the method for eliminating co-channel interference of the present disclosure.

As shown in Figure 4a, in event 410, the terminal sends the capability information that supports CRS interference cancellation to the RRC Setup Complete (RRC Setup Complete) message through a NAS (Non-Access Stratum, non-access stratum) cell. AMF entity.

In event 420, after receiving the NAS message sent by the terminal, the AMF entity will send the capability information to the first NR base station through the Initial UE ContextSetup message.

The first NR base station stores capability information of the terminal, and determines whether the terminal can configure the interference cancellation capability in the connected state according to whether the terminal supports CRS interference cancellation.

In event 430, the first NR base station instructs the terminal to perform inter-system measurement on the same-frequency LTE base station through RRC configuration. According to the measurement result, the terminal reports the set of LTE interference cells that meet the conditions to the first NR base station.

For example, if the terminal also supports SFTD measurement, and for the first NR base station, there is at least one cell whose timing offset relative to the first NR base station is unknown in the set of interfering cells, then the first NR base station may also indicate to the terminal that the set of interfering cells has an unknown timing offset. At least one LTE cell performs SFTD measurements. The terminal then feeds back the timing deviation value to the network side according to the measurement result.

In event 440, the first NR base station checks whether cells in the set of interfering cells have CRS and subframe related information. If one of the cells does not have the above information, the connection mode with the LTE base station is determined according to the network management configuration information. A corresponding configuration request message is generated and sent to the relay node to obtain the CRS and subframe related information of the first LTE base station.

In some embodiments, if the relay node is the first NR base station, event 440 is implemented through the signaling diagram in Figure 4b.

FIG. 4b shows a signaling diagram of other embodiments of the method for eliminating co-channel interference of the present disclosure.

As shown in FIG. 4b, in event 4410, the first NR base station sends the first request information to the second NR base station through the Xn interface message NG-RAN NODECONFIGURATION UPDATE.

For example, the first request information includes a request cell list. The information of each cell package in the request cell list includes the identity of the LTE cell (eg, ECGI information), and the request content (eg, including at least one of request CRS configuration information and request subframe configuration information).

In event 4420, the second NR base station receives the first request information, and obtains the CRS and subframe configuration information of the LTE base station through the internal interface.

In event 4430, the second NR base station sends a request response to the first NR base station via the E-URAN neighbor configuration information in the Xn interface message NG-RAN NODE CONFIGURATION UPDATERESPONSE. The request response is generated according to the corresponding configuration information required by the request content, and the specific content may use the CRS and subframe related information in any of the foregoing embodiments.

In some embodiments, if the relay node is an entity, event 440 is implemented through the signaling diagram in Figure 4c.

FIG. 4c shows a signaling diagram of other embodiments of the method for eliminating co-channel interference of the present disclosure.

As shown in FIG. 4c, in event 4440, the first NR base station sends the second request information to the AMF entity through the second cross-core network message.

For example, the second request information includes the base station identifier of the LTE base station, the TAC information of the LTE base station, the base station identifier of the first NR base station, the TAC information supported by the first NR base station, and the request cell list. The information of each cell in the list of requested cells includes the identity of the LTE cell and the content of the request (for example, including at least one of the requested CRS configuration information and the requested subframe configuration information).

In event 4450, after receiving the second request information, the AMF entity determines the MME entity according to the TAC information of the LTE base station, and sends the second request information to the MME entity.

In event 4460, the MME entity generates a request content message according to the identifier of the LTE base station, determines the destination base station to which the message is forwarded, and sends the request content information to the LTE base station. For example, the request content message includes the base station identifier of the first NR base station, the TAC information of the first NR base station, and the specific request content.

In event 4470, the LTE base station receives the request content message, generates a response message for the requested content, and sends it to the MME entity.

In event 4480, the MME entity determines the AMF entity to which the message is to be forwarded according to the TAC information of the first NR base station, and forwards the message to the AMF entity.

In event 4490, the AMF entity determines the base station to which the response information needs to be sent according to the identity of the first NR base station, and sends the corresponding information to the first NR base station.

For example, the response message for the requested content includes the base station identity of the LTE base station, the TAC information of the LTE base station, the base station identity of the first NR base station, the TAC information supported by the first NR base station, and the requested configuration message (the specific content is provided according to the request instruction). ).

Interference cancellation can be accomplished through the remaining events in Figure 4a after the response information is obtained.

In event 450, the first NR base station determines CRS and subframe related information according to the response information, and generates interference cancellation information.

In event 460, the first NR base station sends the interference cancellation information to the corresponding terminal through the RRC connection reconfiguration message according to the context information of the terminal on whether the terminal supports the function of CRS interference cancellation.

For example, the RRC connection reconfiguration message includes a list of CRS interference configuration and subframe configuration information of each LTE cell, and the configuration information of each LTE cell in the list includes LTE PCI information, CRS port type (such as single-port, dual-port and quad-port) , downlink frequency, downlink bandwidth, CRS pattern, MBSFN subframe configuration (optional), ABS subframe configuration (optional), time offset (optional).

In event 470, based on the interference cancellation information sent by the network side, the terminal performs CRS interference cancellation for non-MBSFN subframes, does not perform CRS interference cancellation for the neighboring cell for MBSFN subframes, and skips CRS for ABS subframes. Interference cancellation works.

In the above embodiment, CRS interference from adjacent cells can be eliminated when LTE and NR are deployed adjacently, thereby improving terminal throughput and improving user experience in a coexistence scenario of LTE and NR.

It can reduce the interference of the terminal in the idle state and from the LTE co-frequency cell before the random access is completed, and improve the reliability of data reception of the terminal in the idle state. Moreover, the MCS level of the terminal configuration SIB message and the paging message can be improved, the PRB overhead of the common channel is reduced, and the performance of the whole system is improved.

It solves the problem that there is no direct connection interface between LTE and NR, resulting in the inability to exchange related information about CRS and subframes, realizes the automatic exchange of parameter configuration information, reduces manual participation, and reduces operation and maintenance costs.

The technical solution of the present disclosure has little impact on the terminal, and has good backward compatibility and deployment feasibility. Moreover, the technical solution of the present disclosure is to enhance the existing protocol, without introducing a new protocol process, and the implementation difficulty is low.

FIG. 5 shows a schematic diagram of some embodiments of the co-channel interference cancellation method of the present disclosure.

As shown in Figure 5, in a macro-micro networking scenario, the indoor micro-station adopts the 2.1GHz 20MHz bandwidth NR device gNB2, which is the second NR base station in any of the above-mentioned embodiments; the outdoor macro-station adopts the The 2.1GHz LTE FDD base station eNB, that is, the LTE base station in any of the above embodiments, has the same frequency and same bandwidth as the indoor NR equipment; the outdoor base station also includes a 3.5GHz NR TDD base station gNB1, that is, the No. An NR base station, an Xn interface exists between the base station and the indoor base station.

In some embodiments, configuring the SIB1 broadcast message for the base station and the interference cancellation method adopted by the terminal before completing the RRC establishment process may include the following steps.

The eNB generates the related information of the LTE CRS and the subframe. Since there is a gNB2 deployed in a co-site, it sends the related information of the LTE CRS and the subframe to the gNB2. gNB2 sends the CRS and subframe related information of the LTE cell as part of the LTE neighbor cell information to gNB1 through the NG-RAN Configuration Update Request message.

The gNB1 determines the interference source from the LTE cell received by the gNB1 according to the inter-system measurement results reported by multiple terminals configured by the network management or stored. The determination method is to enter the interference cell set for the cells whose interference is higher than the preset threshold. gNB1 generates interference cancellation configuration information according to the set of interfering cells, and broadcasts it on the air interface through the SIB1 message.

After the terminal receives the SIB1 message sent by gNB1, if it supports the interference cancellation capability, when receiving random process downlink messages, receiving paging and receiving other SIB broadcast messages except SIB1, it will perform LTE neighbor cell based on the auxiliary information on the network side. CRS interference cancellation.

The terminal subtracts the CRS signals of all interfered cells from the received signal, and then completes the detection result of the RE after removing the CRS interference signal by means of MMSE.

In some embodiments, a method for interference cancellation performed by the network when the terminal is in a connected state. The following steps can be included.

The terminal carries the capability information of supporting CRS interference cancellation through the NAS cell in the RRC Setup Complete message. After receiving the NAS message sent by the terminal, the AMF entity will send the capability information to gNB1 through the Initial UE Context Setup message.

gNB1 saves capability information, and determines whether the terminal can configure the interference cancellation capability in the connected state according to whether the terminal supports CRS interference cancellation. The gNB1 instructs the terminal to perform inter-system measurement on the same-frequency LTE base station through the RRC configuration. The terminal reports the set of interfering cells that meet the conditions to gNB1 according to the measurement configuration. gNB1 checks whether the cells in the interfering cell set have CRS and subframe related information.

When the relay node is gNB2, the first request message is sent through the Xn interface message NG-RAN NODE CONFIGURATIONUPDATE.

After receiving the first request message, gNB2 determines the CRS and subframe related information of the eNB obtained by the internal interface, and sends the request content response message through the E-URAN neighbor configuration information in the Xn interface message NG-RAN NODE CONFIGURATION UPDATE RESPONSE .

After receiving the request content response message, the gNB1 sends the CRS interference configuration message to the terminal through the RRC connection reconfiguration message according to whether the terminal supports the function of CRS interference cancellation in the context of the terminal.

Based on the network side configuration, the terminal performs CRS interference cancellation for non-MBSFN subframes, does not perform CRS interference cancellation on the neighboring cell for MBSFN subframes, and skips CRS interference cancellation for ABS subframes.

6 illustrates a block diagram of some embodiments of a new air interface base station of the present disclosure.

As shown in FIG. 6 , the new air interface base station 6, as the first NR base station, includes: a receiving unit 61, configured to receive CRS and subframe related information sent by the LTE base station through the relay node, and the LTE base station and the second NR base station are co-located and deployed The processing unit 62 is used to generate interference cancellation information according to the relevant information; The sending unit 63 is used to send the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability can eliminate the LTE base station to the second NR base station according to the interference cancellation information. co-channel interference.

7 illustrates a block diagram of some embodiments of a terminal of the present disclosure.

As shown in FIG. 7 , the terminal 7 includes: a receiving unit 71, configured to receive interference cancellation information sent by the first NR base station, where the interference cancellation information is the CRS and sub-interference transmitted by the first NR base station through the relay node according to the received LTE base station The relevant information of the frame is generated; the processing unit 72 is configured to eliminate the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information, and the LTE base station and the second NR base station are deployed in the same site.

In some embodiments, the terminal 7 further includes a sending unit 73, configured to send the inter-system measurement result to the first NR base station, so that the first NR base station determines the first NR base station according to the inter-system measurement result reported by the terminal configured by the network management or stored. The cell interference source of the LTE base station received by the NR base station, and then the set of interference cells is determined according to the interference strength of each cell interference source.

FIG. 8 shows a block diagram of some embodiments of the co-channel interference cancellation apparatus of the present disclosure.

As shown in FIG. 8 , the device 8 for eliminating co-channel interference in this embodiment includes: a memory 81 and a processor 82 coupled to the memory 81 , and the processor 82 is configured to execute the present invention based on the instructions stored in the memory 81 . The method for eliminating co-channel interference in any one of the embodiments in the disclosure.

Wherein, the memory 51 may include, for example, a system memory, a fixed non-volatile storage medium, and the like. The system memory stores, for example, an operating system, an application program, a boot loader, a database, and other programs.

FIG. 9 shows a block diagram of other embodiments of the apparatus for eliminating co-channel interference of the present disclosure.

As shown in FIG. 9 , the device 9 for eliminating co-channel interference in this embodiment includes: a memory 910 and a processor 920 coupled to the memory 910 , and the processor 920 is configured to execute the aforementioned instructions based on the instructions stored in the memory 910 . The method for eliminating co-channel interference in any one of the embodiments.

Memory 910 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a boot loader, and other programs.

The device 9 for eliminating co-channel interference may further include an input and output interface 930, a network interface 940, a storage interface 950, and the like. These interfaces 930 , 940 , 950 and the memory 910 and the processor 920 can be connected, for example, through a bus 960 . The input and output interface 930 provides a connection interface for input and output devices such as a display, a mouse, a keyboard, a touch screen, a microphone, and a speaker. Network interface 940 provides a connection interface for various networked devices. The storage interface 950 provides a connection interface for external storage devices such as SD cards and U disks.

10 illustrates a block diagram of some embodiments of the co-channel interference cancellation system of the present disclosure.

As shown in FIG. 10 , the system 10 for eliminating co-channel interference includes: a new air interface base station 101, which is used as a first NR base station to execute the method for eliminating co-channel interference on the base station side in any of the foregoing embodiments; a terminal 102, used for Perform the method for eliminating co-channel interference on the terminal side in any of the foregoing embodiments; the relay node 103 is configured to forward the CRS and subframe related information sent by the LTE base station to the first NR base station, and the LTE base station communicates with the second NR base station. Co-location of base stations.

In some embodiments, the relay node 103 is an AMF entity, and sends the request information of the CRS and subframe related information sent by the first NR base station to the corresponding MME entity, and the MME entity generates the request according to the identifier of the corresponding LTE base station The content information is sent to the corresponding LTE base station, and the LTE base station generates response information according to the requested content information and forwards it to the AMF entity, and the AMF entity sends the response information to the first NR base station.

In some embodiments, the relay node 103 is the second NR base station, and determines the CRS and subframe related information of the corresponding LTE base station according to the request information for the CRS and subframe related information sent by the first NR base station, through the Xn interface The E-URAN neighbor configuration information in the radio access network node configuration update response (eg, NG-RAN NODE CONFIGURATION UPDATE RESPONSE) in the message is sent to the first NR base station as response information.

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

So far, the method for eliminating co-channel interference, the device for eliminating co-channel interference, the system for eliminating co-channel interference, the new air interface base station, the terminal, and the non-volatile computer-readable storage medium according to the present disclosure have been described in detail. Some details that are well known in the art are not described in order to avoid obscuring the concept of the present disclosure. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

The methods and systems of the present disclosure may be implemented in many ways. For example, the methods and systems of the present disclosure may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure can also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

While some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are provided for illustration only, and are not intended to limit the scope of the present disclosure. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (40)

1. A method for eliminating co-channel interference, performed by a first new air interface NR base station, comprising: The first NR base station receives the cell reference signal CRS and subframe related information sent by the long-term evolution LTE base station through the relay node, and the LTE base station and the second NR base station are deployed in the same site; generating, by the first NR base station, interference cancellation information according to the relevant information; The first NR base station sends the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability cancels the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information. 2. The elimination method according to claim 1, wherein, The CRS and subframe related information is generated by the LTE base station and sent to the second NR base station deployed with it, and then sent to the first NR base station by the second NR base station serving as the relay node . 3. The elimination method according to claim 2, wherein, The CRS and subframe related information is sent by the second NR base station to the first NR base station through an interface setup request message or a radio access network configuration update request message as part of the LTE neighbor cell information. 4. The cancellation method according to claim 1, wherein the generation of the interference cancellation information by the first NR base station according to the relevant information comprises: The first NR base station acquires a set of interfering cells determined according to the inter-system measurement results of each terminal, and the interference strength of cells in the set of interfering cells is greater than an interference threshold; The first NR base station generates the interference cancellation information according to the interference cell set and the related information. 5. The elimination method according to claim 4, wherein the first NR base station acquiring the set of interfering cells determined according to the inter-system measurement results of each terminal comprises: The first NR base station determines the cell interference source of the LTE base station received by the first NR base station according to the inter-system measurement results reported by multiple terminals configured by the network management or stored; The set of interfering cells is determined according to the interference strength of the interference sources of each cell. 6. The elimination method according to claim 4, wherein the first NR base station acquiring the set of interfering cells determined according to the inter-system measurement results of each terminal comprises: The first NR base station instructs each terminal to perform inter-system measurement on the LTE base stations deployed in each co-site, so that each terminal reports the set of interfering cells determined according to the inter-system measurement result. 7. The elimination method according to claim 6, wherein the first NR base station instructing each terminal to perform inter-system measurement on the co-site deployed LTE base station comprises: In the case that the terminal supports system frame number and frame timing difference SFTD measurement, the terminal is instructed to perform SFTD measurement on at least one LTE cell in the set of interfering cells to obtain timing offsets of these LTE cells. 8. The cancellation method according to claim 1, wherein sending the interference cancellation information to the terminal side by the first NR base station comprises: The first NR base station broadcasts the interference cancellation information through the system information block SIB1, so that the terminal supporting the interference cancellation capability cancels the CRS interference in the received information according to the interference cancellation information, and the received information includes random process downlink information, At least one item of paging and other broadcast information other than the SIB1. 9. The elimination method according to claim 1, wherein the reception by the first NR base station of CRS and subframe related information sent by the LTE base station through the relay node comprises: The first NR base station instructs each terminal to perform inter-system measurement on the LTE base stations deployed by each co-site; The first NR base station sends, according to the inter-system measurement result of each terminal, the request information for the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station; The first NR base station obtains the relevant information of the CRS and the subframe according to the response information of the relay node. 10. The elimination method according to claim 9, wherein the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station comprises: The first NR base station determines the connection mode of the corresponding LTE base station according to the network management configuration information; According to the connection mode, the relay node and its corresponding request information are determined. 11. The elimination method according to claim 9, wherein the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station comprises: When the relay node is an authentication management function AMF entity, the request message is sent to the AMF entity through a cross-core network message. 12. The elimination method of claim 11, wherein, The request information sent to the AMF entity includes the base station identifier of the corresponding LTE base station, the tracking area code TAC information of the corresponding LTE base station, the base station identifier of the first NR base station, the TAC information supported by the first NR base station, and the request cell list. Each cell information in the requested cell list includes at least one item of requested CRS configuration information, subframe configuration information, and a corresponding LTE cell identifier. 13. The cancellation method according to claim 9, wherein the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station comprises: When the relay node is an authentication management function AMF entity, the first NR base station generates corresponding request information and sends it to the AMF entity, so that the AMF entity sends the response information to the first NR base station. 14. The elimination method of claim 13, wherein, The request content information includes the base station identifier of the first NR base station, the TAC information of the first NR base station, and the specific request content, The response information includes the base station identifier of the corresponding LTE base station, the TAC information of the corresponding LTE base station, the base station identifier of the first NR base station, the TAC information supported by the first NR base station, and the configuration message corresponding to the request. 15. The elimination method according to claim 9, wherein the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station comprises: When the relay node is the second NR base station, the request message is sent to the second NR base station through the radio access network node configuration update message in the Xn interface message. 16. The elimination method of claim 15, wherein, The request message sent to the second NR base station includes a request cell list, and each cell information in the request cell list includes at least one of requested CRS configuration information, subframe configuration information, and a corresponding LTE cell identifier . 17. The cancellation method according to claim 9, wherein the request information for sending the relevant information of the CRS and the subframe to the relay node of the corresponding LTE base station comprises: In the case where the relay node is the second NR base station, the first NR base station sends corresponding request information to the second NR base station, so that the second NR base station sends the relevant information It is sent to the first NR base station as the response information. 18. The elimination method of claim 9, further comprising: The first NR base station receives and saves the capability information of supporting interference cancellation sent by the terminal through the AMF entity; in, The first NR base station sending the interference cancellation information to the terminal side includes: The first NR base station sends the interference cancellation information to the terminal supporting the interference cancellation capability through a radio resource control RRC connection reconfiguration message according to the saved capability information. 19. The elimination method of claim 18, wherein, The RRC connection reconfiguration message includes LTE physical cell identifier PCI information, CRS port type, downlink frequency, downlink bandwidth, and CRS pattern, The RRC connection reconfiguration message further includes at least one of multicast or multicast single frequency network MBSFN subframe configuration, full-blank subframe ABS subframe configuration, and time offset. 20. The elimination method according to any one of claims 1-19, wherein, The CRS and subframe related information includes LTE PCI information, LTE cell identity, CRS port type, downlink frequency, downlink bandwidth, CRS pattern, and also includes at least one of MBSFN subframe configuration, ABS subframe configuration, and time offset , The interference cancellation information includes an interference cancellation enable indication, a set configuration list of interference cells, and the configuration information of each cell in the set configuration list of interference cells includes the PCI, downlink frequency, downlink bandwidth, and CRS pattern of the cell, and also includes a positioning reference, At least one of MBSFN subframe configuration and ABS subframe configuration. 21. The elimination method of any one of claims 1-19, further comprising: In the case where the terminal does not support the interference cancellation capability but supports the dynamic spectrum sharing DSS capability, the first NR base station determines the LTE cell with the strongest interference according to the capability of the terminal, the relevant information of the CRS and subframes, and the Relevant information includes CRS pattern, downlink frequency, downlink bandwidth, and MBSFN subframe configuration; The first NR base station performs, for the terminal, resource block RB-level rate configuration for the LTE cell to eliminate co-channel interference for the terminal. 22. A method for eliminating co-channel interference, performed by a terminal, comprising: The terminal receives the interference cancellation information sent by the first new air interface NR base station, where the interference cancellation information is the cell reference signal CRS and subframe related information sent by the first NR base station according to the received long-term evolution LTE base station through the relay node generate; The terminal cancels the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information, and the LTE base station and the second NR base station are co-located and deployed. 23. The elimination method of claim 22, further comprising: The terminal performs inter-system measurement on the LTE base stations deployed in each co-site, to determine a set of interfering cells, where the interference strength of the cells in the set of interfering cells is greater than an interference threshold; in, The interference cancellation information is generated by the first NR base station according to the interference cell set and the related information. 24. The elimination method of claim 23, further comprising: The terminal sends the inter-system measurement result to the first NR base station, so that the first NR base station determines, according to the network management configuration or the inter-system measurement result reported by the terminal that is stored, the LTE system received by the first NR base station. The cell interference sources of the base station, and then determine the set of interfering cells according to the interference strength of each cell interference source. 25. The elimination method of claim 23, further comprising: According to the instruction of the first NR base station, the terminal performs inter-system measurement on the LTE base stations deployed by each co-site; determining, by the terminal, the set of interfering cells according to an inter-system measurement result; The terminal sends the set of interfering cells to the first NR base station. 26. The elimination method according to claim 25, wherein the terminal performing inter-system measurement on the LTE base stations deployed by each co-site comprises: In the case of supporting system frame number and frame timing difference SFTD measurement, according to the instruction of the first NR base station, the terminal performs SFTD measurement on at least one LTE cell in the set of interfering cells to The first NR base station reports the timing offsets of these LTE cells. 27. The cancellation method according to claim 22, wherein the interference cancellation information received by the terminal from the first new air interface NR base station comprises: receiving, by the terminal, the interference cancellation information broadcast by the first NR base station through the system information block SIB1; The terminal, according to the interference cancellation information, cancels the co-channel interference of the LTE base station to the second NR base station, including: The terminal cancels the CRS interference in the received information according to the interference cancellation information, where the received information includes at least one item of downlink information of a random process, paging, and other broadcast information other than the SIB1. 28. The cancellation method according to claim 22, wherein, according to the interference cancellation information, the terminal, according to the interference cancellation information, cancels the co-channel interference of the LTE base station to the second NR base station comprising: The terminal determines, according to the interference cancellation information, the original transmission signal of each CRS on the RE symbol of the resource element; The terminal restores the CRS signal of each interfering cell according to the channel estimation result of each original transmitted signal; The terminal cancels the CRS signal of the corresponding interfering cell from the received signal. 29. The cancellation method according to claim 28, wherein, according to the channel estimation result of each original transmitted signal, the terminal restoring the CRS signal of each interfering cell comprises: The terminal performs channel estimation on each of its antennas, and determines a covariance matrix of each channel estimation result; The terminal determines each receiving matrix according to each channel estimation result and its covariance matrix; The terminal restores the CRS signals of each interfering cell according to the respective reception matrices. 30. The elimination method of claim 22, further comprising: According to the instruction of the first NR base station, the terminal performs inter-system measurement on the LTE base stations deployed by each co-site; The terminal sends the inter-system measurement result to the first NR base station, so that the first NR base station sends a request for CRS and subframe related information to the relay node of the corresponding LTE base station according to the inter-system measurement result information, and obtain the relevant information of the CRS and the subframe according to the response information of the relay node. 31. The elimination method of claim 22, further comprising: sending, by the terminal, the capability information of supporting interference cancellation to the first NR base station through the AMF entity; in, The interference cancellation information received by the terminal from the first new air interface NR base station includes: The terminal receives the interference cancellation information sent by the first NR base station through the radio resource control RRC connection reconfiguration message according to the stored capability information. 32. The cancellation method according to claim 30, wherein, according to the interference cancellation information, the terminal, according to the interference cancellation information, cancels the co-channel interference of the LTE base station to the second NR base station comprising: In the case that the received signal is not a multicast or multicast single frequency network MBSFN subframe, the terminal performs CRS interference cancellation according to the interference cancellation information; In the case that the received signal is an MBSFN subframe, the terminal does not perform CRS interference cancellation on neighboring cells; When the received signal is an all-blank subframe ABS, the terminal skips the CRS interference cancellation process for the ABS. 33. A new air interface base station, comprising: a receiving unit, configured to receive the cell reference signal CRS and related information of the subframe sent by the long-term evolution LTE base station through the relay node, and the LTE base station and the second NR base station are deployed in the same site; a processing unit, configured to generate interference cancellation information according to the relevant information; A sending unit, configured to send the interference cancellation information to the terminal side, so that the terminal supporting the interference cancellation capability cancels the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information. 34. A terminal comprising: The receiving unit is configured to receive the interference cancellation information sent by the first new air interface NR base station, where the interference cancellation information is the cell reference signal CRS and subframe sent by the first NR base station according to the received long-term evolution LTE base station through the relay node. related information generation; and a processing unit, configured to eliminate the co-channel interference of the LTE base station to the second NR base station according to the interference cancellation information, and the LTE base station and the second NR base station are deployed in the same site. 35. A system for eliminating co-channel interference, comprising: A new air interface base station, used as the first new air interface NR base station to perform the method for eliminating co-channel interference according to any one of claims 1-21; A terminal for performing the method for eliminating co-channel interference according to any one of claims 22-32; The relay node is configured to forward to the first NR base station the cell reference signal CRS and related information of the subframes sent by the long-term evolution LTE base station, where the LTE base station and the second NR base station are co-located and deployed. 36. The cancellation system of claim 35, wherein, The relay node is an authentication management function AMF entity, and sends the request information of the CRS and subframe related information sent by the first NR base station to the corresponding mobility management MME entity, and the MME entity is based on the corresponding LTE base station. The identifier of the request content is generated and sent to the corresponding LTE base station, and the LTE base station generates the response information according to the request content information and forwards it to the AMF entity, and the AMF entity sends the response information to the first NR base station. 37. The cancellation system of claim 35, wherein, The relay node is the second NR base station, and determines the CRS and subframe related information of the corresponding LTE base station according to the request information for the CRS and subframe related information sent by the first NR base station, and uses the Xn interface message. The radio access network node in the configuration update response E-URAN neighbor cell configuration information in the Evolved Universal Mobile Communication System Terrestrial Radio Access Network, and sends the relevant information as the response information to the first NR base station. 38. A device for eliminating co-channel interference, comprising: memory; and A processor coupled to the memory, the processor configured to perform the method for eliminating co-channel interference of any one of claims 1-21 based on instructions stored in the memory. 39. A device for eliminating co-channel interference, comprising: memory; and A processor coupled to the memory, the processor configured to perform the method for eliminating co-channel interference of any one of claims 22-32 based on instructions stored in the memory. 40. A non-volatile computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the method for eliminating co-channel interference according to any one of claims 1-21, or claims The method for eliminating co-channel interference according to any one of 22-32.

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