Interference mitigation method and system, terminal, and base station

Abstract

The present disclosure relates to a method and system for interference mitigation, and to a terminal and a base station, and also to the technical field of communication. The method of the present disclosure is performed by a terminal, and includes reporting cell-specific reference signal (CRS) interference mitigation capability information to a base station, where the CRS interference mitigation capability information is used to indicate whether a terminal in a first mode cell supports CRS interference mitigation of a neighboring cell in a second mode in a scenario where the spectrum of a first mode and a second mode overlap; receiving neighboring cell CRS assist information transmitted from the base station, where the neighboring cell CRS assist information includes CRS-related information of one or more neighboring cells in the second mode; and performing interference mitigation according to the neighboring cell CRS assist information.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on and claims the benefit of priority from Chinese Patent Application No. 202211019904.X, filed on August 24, 2022, which is incorporated herein by reference in its entirety.

[0002] The present disclosure relates to the technical field of communications technology, and in particular to a method and system for interference mitigation, as well as a terminal and a base station. [Background technology]

[0003] Dynamic spectrum sharing (DSS) technology between LTE (Long Term Evolution) and NR (New Radio) (also known as LTE-NR coexistence technology) is one of the key features introduced in the early stages of current 5G (fifth generation mobile communication technology) network deployment to reduce station construction costs and deployment time. The essence of DSS is that LTE and NR share the same spectrum, and 4G or 5G transmission is dynamically performed by the network side based on network load and other factors to allocate resources to terminals. Summary of the Invention [Means for solving the problem]

[0004] According to some embodiments of the present disclosure, there is provided an interference mitigation method performed by a terminal, the method including: reporting cell-specific reference signal (CRS) interference mitigation capability information to a base station, the CRS interference mitigation capability information being used to indicate whether a terminal in a cell of a first mode supports CRS interference mitigation of a neighboring cell of a second mode in a scenario where the spectrum of the first mode and the spectrum of the second mode overlap; receiving neighboring cell CRS assist information transmitted from the base station, the neighboring cell CRS assist information including CRS-related information of one or more neighboring cells of the second mode; and performing interference mitigation according to the neighboring cell CRS assist information.

[0005] In some embodiments, the CRS-related information of each of the one or more neighboring cells of the second mode includes at least one of first indication information or a frequency domain deviation value, where the first indication information is used to indicate whether the overlapped spectrum of each of the one or more neighboring cells of the second mode and the cell of the first mode is aligned in the frequency domain, and the frequency domain deviation value is the frequency domain deviation value of the overlapped spectrum of each of the one or more neighboring cells of the second mode and the cell of the first mode.

[0006] In some embodiments, when the neighbor cell CRS assist information includes CRS-related information of a plurality of neighbor cells in a second mode, the CRS-related information of each of the plurality of neighbor cells in the second mode includes a physical cell identifier of each of the plurality of neighbor cells in the second mode.

[0007] In some embodiments, the method further includes receiving second mode CRS pattern information transmitted from the base station, the second mode CRS pattern information including configuration information of one or more CRSs corresponding to one or more cells of the second mode.

[0008] In some embodiments, the second mode CRS pattern information Corresponding to multiple cells in the second modeWhen multiple CRS configuration information is included, the second mode Multiple cell Each of The corresponding CRS configuration information is Multiple Cell Each , a downlink carrier frequency, a downlink carrier bandwidth, the number of CRS ports, and a physical cell identifier modulo 6 remainder, and the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of the CRS corresponding to the CRS of each of the one or more neighboring cells in the second mode, or the CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, the number of CRS ports, and a physical cell identifier modulo 6 remainder, of each of the one or more neighboring cells in the second mode.

[0009] In some embodiments, the second mode CRS pattern information Corresponding to multiple cells in the second mode When multiple CRS configuration information is included, the second mode Multiple cell Each of The corresponding CRS configuration information is Multiple Cell Each , a downlink carrier frequency, a downlink carrier bandwidth, a Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration, the number of CRS ports, and the physical cell identifier modulo 6 remainder, and the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of the CRS corresponding to the CRS of each of the one or more neighboring cells in the second mode, or the CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, an MBSFN subframe configuration, the number of CRS ports, and the physical cell identifier modulo 6 remainder,

[0010] In some embodiments, the index corresponds to an index order of the configuration information for each of the multiple CRSs.

[0011] In some embodiments, the CRS-related information of each of the one or more neighboring cells in the second mode is used to indicate whether the CRS-related information of each of the one or more neighboring cells in the second mode satisfies the default network configuration information. 2 The neighbor cell CRS assist information includes an indication of whether the CRS-related information of one or more neighbor cells in the second mode satisfies the default network configuration information. 3 Further includes instruction information.

[0012] In some embodiments, the first mode determines that the CRS-related information of each of the one or more neighboring cells in the second mode does not satisfy the default network configuration information. 2 If the indication information indicates that the CRS-related information of one or more neighboring cells in the second mode does not satisfy the default network configuration information, 3 When the instruction information indicates 2 Instruction information or 3 The indication information instructs the terminal to disable interference mitigation operations for CRSs of one or more neighboring cells in the second mode. Shown in It is also used to

[0013] In some embodiments, the CRS-related information for each of the one or more neighboring cells in the second mode further includes at least one of a physical cell identifier, a physical cell identifier modulo 6 remainder, a slot number, a duplex mode indication information, an uplink / downlink subframe ratio, a cyclic prefix type indication information, a downlink carrier frequency, a downlink carrier bandwidth, a Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration, a number of CRS ports, or a CRS mute indication information for each of the one or more neighboring cells in the second mode.

[0014] In some embodiments, performing interference mitigation according to neighbor cell CRS assist information is ,next The method includes enabling interference mitigation operations for the CRS of one or more neighboring cells in the second mode according to the neighboring cell CRS assistance information, and performing interference detection and interference mitigation, wherein the neighboring cell CRS assistance information or the CRS rate match signaling of the second mode implicitly indicates to the terminal that interference mitigation operations for the CRS of one or more neighboring cells in the second mode are enabled.

[0015] In some embodiments, the method further comprises: 4 receiving an instruction from the 4 The indication information is used to indicate to the terminal to enable interference mitigation operations for CRSs of one or more neighboring cells in the second mode.

[0016] In some embodiments, 4 The indication information is carried by radio resource control (RRC) signaling.

[0017] In some embodiments, the method further includes receiving neighbor cell CRS assist information release information transmitted from the base station, and deleting the stored neighbor cell CRS assist information according to the neighbor cell CRS assist information release information.

[0018] In some embodiments, the neighbor cell CRS assistance information is carried by radio resource control (RRC) signaling.

[0019] In some embodiments, when the neighbor cell CRS assist information includes CRS-related information of a plurality of neighbor cells in the second mode, the CRS-related information of each of the plurality of neighbor cells in the second mode includes a physical cell identifier or a remainder of the physical cell identifier modulo 6 of each of the plurality of neighbor cells in the second mode.

[0020] According to another embodiment of the present disclosure, there is provided an interference mitigation method performed by a base station, the method including: receiving cell-specific reference signal (CRS) interference mitigation capability information reported by a terminal, the CRS interference mitigation capability information being used to indicate whether a terminal in a cell of a first mode supports CRS interference mitigation of a neighboring cell of a second mode in a scenario where the spectra of the first mode and the second mode overlap; and transmitting neighboring cell CRS assist information to the terminal, the neighboring cell CRS assist information including CRS-related information of one or more neighboring cells of the second mode for assisting the terminal in performing interference mitigation for the CRS of the one or more neighboring cells of the second mode.

[0021] In some embodiments, the CRS-related information of each of the one or more neighboring cells of the second mode includes at least one of first indication information or a frequency domain deviation value, wherein the first indication information is used to indicate whether the overlapped spectrum of each of the one or more neighboring cells of the second mode and the cell of the first mode is aligned in the frequency domain, and the frequency domain deviation value is the frequency domain deviation value of the overlapped spectrum of each of the one or more neighboring cells of the second mode and the cell of the first mode.

[0022] In some embodiments, when the neighbor cell CRS assist information includes CRS-related information of a plurality of neighbor cells in the second mode, the CRS-related information of each of the plurality of neighbor cells in the second mode includes a physical cell identifier or a remainder of the physical cell identifier modulo 6 of each of the plurality of neighbor cells in the second mode.

[0023] In some embodiments, the method further includes transmitting second mode CRS pattern information to the terminal, the second mode CRS pattern information including configuration information of one or more CRSs corresponding to one or more cells of the second mode.

[0024] In some embodiments, the second mode CRS pattern information Corresponding to multiple cells in the second mode When multiple CRS configuration information is included, the second mode Multiple cell Each of The corresponding CRS configuration information is Multiple Cell Each , a downlink carrier frequency, a downlink carrier bandwidth, the number of CRS ports, and a physical cell identifier modulo 6 remainder, and the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of the CRS corresponding to each CRS of the one or more neighboring cells in the second mode, or S Seki relationship The news is , the downlink carrier frequency, the downlink carrier bandwidth, the number of CRS ports, and the physical cell identifier modulo 6 of each of the one or more neighboring cells of the second mode.

[0025] In some embodiments, the second mode CRS pattern information Corresponding to multiple cells in the second mode When multiple CRS configuration information is included, the second mode Multiple cell Each of The corresponding CRS configuration information is Multiple Cell Each the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify the CRS configuration information corresponding to the CRS of each of the one or more neighboring cells in the second mode, the index used to identify the CRS configuration information corresponding to the CRS of each of the one or more neighboring cells in the second mode, the downlink carrier frequency, the downlink carrier bandwidth, the multicast / broadcast single frequency network (MBSFN) subframe configuration, the number of CRS ports, and the physical cell identifier modulo 6 remainder; ,also is the CR of each of one or more neighboring cells in the second mode. S-kan relationship The news is, the downlink carrier frequency, downlink carrier bandwidth, MBSFN subframe configuration, number of CRS ports, and physical cell identifier modulo 6 remainder of each of the one or more neighboring cells in the second mode.

[0026] In some embodiments, the CRS-related information of each of the one or more neighboring cells in the second mode includes the CRS-related information of each of the one or more neighboring cells in the second mode. S-kan relationship The news This is used to indicate whether the default network configuration information is met. 2 or the neighbor cell CRS assist information includes an indication of the CRS of one or more neighbor cells in the second mode. S-kan relationship The news This is used to indicate whether the default network configuration information is met. 3 Further includes instruction information.

[0027] In some embodiments, the CR of each of the one or more neighboring cells in the second mode S-kan relationship The news The default network configuration information is not met. 2 When the indication information of the second mode indicates that the CR of one or more neighboring cells S-kan relationship The news The default network configuration information is not met. 3 When the instruction information indicates 2 Instruction information or 3 The indication information may disable interference mitigation operations for the CRS of one or more neighboring cells in the second mode. The end It is also used to indicate the end.

[0028] In some embodiments, the method further comprises: 4 and transmitting the instruction information to the 4 The indication information is used to indicate to the terminal to enable interference mitigation operations for CRSs of one or more neighboring cells in the second mode.

[0029] According to still other embodiments of the present disclosure, there is provided a method for implementing ... Executed by the terminal a memory coupled to the processor for storing instructions that cause the processor to perform an interference mitigation method; Terminal is provided.

[0030] According to still other embodiments of the present disclosure, there is provided a base station comprising: a processor; and a memory coupled to the processor for storing instructions that, when executed by the processor, cause the processor to implement an interference mitigation method performed by the base station according to any of the preceding embodiments.

[0031] According to still other embodiments of the present disclosure, there is provided an interference mitigation system comprising: a terminal according to any of the previous embodiments; and a base station according to any of the previous embodiments.

[0032] According to a further embodiment of the present disclosure, there is provided a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, causes the processor to perform the interference mitigation method of any of the preceding embodiments.

[0033] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings.

[0034] In order to provide a clearer description of the embodiments of the present disclosure or the technical solutions in the prior art, a brief overview is given below with reference to the accompanying drawings required in the description of the embodiments or the prior art. Of course, the drawings in the following description are only a part of the embodiments of the present disclosure. Those skilled in the art can also obtain other drawings based on these accompanying drawings without any creative work being required. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a flowchart of an interference mitigation method provided in some embodiments of the present disclosure. [Figure 2] FIG. 2 is a schematic structural diagram of a terminal provided in some embodiments of the present disclosure. [Figure 3] FIG. 2 is a schematic structural diagram of a base station provided in some embodiments of the present disclosure. [Figure 4] 1 is a schematic structural diagram of a communication device provided in some embodiments of the present disclosure. [Figure 5] 10 is a schematic structural diagram of a communication device provided in some other embodiments of the present disclosure. [Figure 6] 1 is a schematic structural diagram of an interference mitigation system provided in some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0036] The technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Of course, the described embodiments are not the whole embodiments, but only a part of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely exemplary in nature and does not limit the present disclosure, its application or uses in any way. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present disclosure.

[0037] In the DSS scenario, the inventors is L It was found that TE neighboring cells cause significant interference to NR cell data transmissions. Although the amount of downlink data in LTE neighboring cells is gradually decreasing with the phased withdrawal of LTE, the LTE downlink CRS (Cell-specific Reference Signal), which is normally on and occupies fixed resources, will still significantly interfere with 5G NR terminals in NR cells for quite some time to come.

[0038] The technical problem to be solved by the present disclosure is how to improve the reliability and accuracy of terminal reception in an NR cell in a DSS scenario.

[0039] This disclosure presents an interference mitigation method, which is described below with reference to FIG.

[0040] 1 is a flowchart of interference mitigation in some embodiments of the present disclosure. As shown in FIG. 1, the method of the embodiment includes steps S102 to S106.

[0041] In step S102, the terminal reports CRS interference mitigation capability information to the base station, and in response, the base station receives the CRS interference mitigation capability information transmitted from the terminal.

[0042] The terminal (also referred to as UE) is located in a cell of a first mode, and the base station is a base station to which the cell of the first mode belongs. For example, the first mode is NR and the second mode is LTE. Of course, the method of the present disclosure can also be applied to a scenario in which the spectrum of the first mode and the second mode, which are different modes, overlap.

[0043] In some embodiments, the CRS interference mitigation capability information is used to indicate whether a terminal in a first mode cell supports CRS interference mitigation of a neighboring cell of a second mode in a scenario where the spectrum of the first mode and the second mode overlap. For example, the CRS interference mitigation capability information is supportedCRS-InterMitigation-r17, which indicates whether the terminal supports CRS interference mitigation of a neighboring LTE cell in a DSS scenario and a non-DSS scenario where the spectrum of LTE and NR overlap. For example, the CRS interference mitigation capability information includes crs-IM-DSS-15kHz SCS-r17, which indicates whether the terminal supports CRS interference mitigation of a neighboring LTE cell in a DSS scenario with NR 15kHz SCS (Subcarrier Space). (CRS Interference Mitigation) Used to indicate whether the

[0044] In some embodiments, the base station transmits capability inquiry information to the terminal, and the terminal reports CRS interference mitigation capability information to the base station.

[0045] In step S104, the base station transmits neighboring cell CRS assist information to the terminal, and in response, the terminal receives the neighboring cell CRS assist information transmitted from the base station.

[0046] The base station may transmit neighbor cell CRS assist information to the terminal if the terminal supports neighbor cell CRS interference mitigation in the second mode, or may transmit neighbor cell CRS assist information regardless of whether the terminal supports neighbor cell CRS interference mitigation in the second mode. The neighbor cell CRS assist information may be carried by RRC (Radio Resource Control) signaling. The neighbor cell CRS assist information is used to assist the terminal in performing neighbor cell CRS interference mitigation in the second mode.

[0047] For example, the neighbor cell CRS assist information includes CRS-related information of one or more neighbor cells of the second mode. If the neighbor cell is an LTE neighbor cell, the neighbor cell CRS assist information is, for example, an LTE-NeighCellsCRS-AssistInfoList IE (Information Element), which is used to provide configuration information of the LTE neighbor cell and to assist the terminal in performing interference mitigation in a scenario where the LTE and NR spectrums overlap. The neighbor cell CRS assist information may be a list including up to N arrays, where each array in the list indicates CRS-related information of one neighbor cell known to the network side, and this neighbor cell may have a spectrum overlap with the cell of the first mode in which the terminal is located.

[0048] In some embodiments, the CRS-related information of each of the one or more neighboring cells in the second mode includes at least one of first indication information or a frequency domain deviation value, where the first indication information is used to indicate whether the overlapped spectrum of each of the one or more neighboring cells in the second mode and the cell in the first mode is aligned in the frequency domain, and the frequency domain deviation value is a frequency domain deviation value of the overlapped spectrum of each of the one or more neighboring cells in the second mode and the cell in the first mode. For example, the first indication information is used to indicate whether the overlapped spectrum of each of the one or more neighboring cells in the second mode and the cell in the first mode is aligned in the frequency domain. The overlapping spectra of are used to indicate whether they are lined up in the frequency domain, and / or are frequency domain deviation values.

[0049] In some embodiments, when the neighbor cell CRS assist information includes CRS-related information of multiple neighbor cells in the second mode, the CRS-related information of each of the multiple neighbor cells in the second mode includes a physical cell identifier (PCI) of each of the multiple neighbor cells in the second mode. When the neighbor cell CRS assist information includes CRS-related information of only one neighbor cell in the second mode, the neighbor cell CRS assist information may also include a physical cell identifier of the neighbor cell in the second mode. When the base station needs to transmit the CRS-related information of multiple neighbor cells in the second mode to the terminal, it is mandatory that the physical cell identifier be included in the CRS-related information of each of the multiple neighbor cells in the second mode. This is to avoid that when parameters of the CRS-related information of different neighbor cells in the second mode are different, it becomes difficult for the terminal to determine the corresponding relationship between the parameters and the neighbor cell in the second mode, resulting in the failure of the interference cancellation algorithm.

[0050] In some embodiments, the CRS-related information for each of the plurality of neighboring cells in the second mode includes at least one of a physical cell identifier, a physical cell identifier modulo 6 remainder, a slot number, a duplex mode indication information, an uplink / downlink subframe ratio, a cyclic prefix type indication information, a downlink carrier frequency, a downlink carrier bandwidth, a multicast broadcast single frequency network (MBSFN) subframe configuration, a number of CRS ports, or a CRS mute indication information for each of the one or more neighboring cells in the second mode. Including nothing.

[0051] For example, when the second mode is LTE, the neighbor cell CRS assist information is LTE-NeighCellsCRS-AssistInfoList, and all items of information (each of which is optional) included in the CRS-related information of each of one or more neighbor cells in the second mode are described as follows:

[0052] a physical cell identifier (which can be called neighCellId-r17), for example EUTRA-PhysCellId;

[0053] For example, an enumerated value (ENUMERATED) with a range of values n0, n1, n2, n3, n4, n5, and a remainder of the physical cell identifier modulo 6 to indicate the V-Shift of the LTE neighboring cell (which can be called neighV-Shift-r17);

[0054] slot number, e.g., the slot number of the LTE neighbor cell;

[0055] duplex mode indication information for indicating that the LTE neighboring cell uses FDD or TDD duplex mode, which may also include the uplink / downlink subframe ratio of the LTE neighboring cell if the duplex mode is TDD;

[0056] Cyclic prefix type indication to indicate whether the LTE neighbor cell uses normal cyclic prefix (CP) or extended cyclic prefix (CP);

[0057] Downlink carrier frequency (can be called neighCarrierFreqDL-r17) to indicate the downlink center frequency of the LTE neighboring cell, for example, an INTEGER value with a value range of 0 to 16838;

[0058] Downlink carrier bandwidth (which can be called neighCarrierBandwidthDL-r17) to indicate the number of PRBs (Physical Resource Blocks) occupied by the channel bandwidth of the LTE neighboring cell, which is an enumeration (ENUMERATED) with values ranging from, for example, n6, n15, n25, n50, n75, n100, spare2, spare1;

[0059] MBSFN subframe configuration (which can be called neighMBSFN-SubframeConfigList-r17) to indicate the MBSFN subframe configuration of the LTE neighboring cell, for example EUTRA-MBSFN-SubframeConfigList;

[0060] The number of CRS ports (which can be called neighNrofCRS-Ports-r17) to indicate the number of CRS antenna ports of the LTE neighboring cell, which is an enumerated value (ENUMERATED) with a range of values, for example, n1, n2, n4;

[0061] For example, CRS muting indication information (which can be called neighCRS-muting-r17) for indicating whether to enable network-based CRS interference mitigation in LTE neighboring cells, which is an enumerated value (ENUMERATED) having a value range of enabled.

[0062] In some embodiments, the base station transmits second mode CRS pattern information to the terminal, and correspondingly, the terminal also receives second mode CRS pattern information transmitted from the base station, where the second mode CRS pattern information includes configuration information of one or more CRSs corresponding to one or more cells of the second mode. This step and step S104 do not need to be in a particular order.

[0063] When the second mode is LTE, the second mode CRS pattern information is, for example, RateMatchPatternLTE-CRS (LTE-CRS Rate Match Pattern), which can be sent via R16 DSS signaling (existing signaling of protocol LTE-CRS-PatternList-r16) and can be sent from the serving cell.

[0064] In some embodiments, the configuration information of the CRS corresponding to each of the one or more cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 for each of the one or more cells in the second mode, or the configuration information of the CRS corresponding to each of the one or more cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, an MBSFN subframe configuration, a number of CRS ports, and a physical cell identifier modulo 6 for each of the one or more cells in the second mode.

[0065] For example, when the second mode is LTE, all items of information included in the configuration information of the CRS corresponding to each of one or more cells in the second mode are described as follows:

[0066] For example, the downlink carrier frequency (which can be called carrierFreqDL), which is an integer value (INTEGER) with a value range of 0 to 16838;

[0067] For example, the downlink carrier bandwidth (which can be called carrierBandwidthDL) is an enumeration with the range of values: n6, n15, n25, n50, n75, n100, spare2, spare1;

[0068] For example, an MBSFN subframe configuration (which can be called mbsfn-SubframeConfigList), which is EUTRA-MBSFN-SubframeConfigList;

[0069] For example, the number of CRS ports (which can be called nrofCRS-Ports), which is an enumerated value (ENUMERATED) with a range of values: n1, n2, n4;

[0070] For example, the physical cell identifier modulo 6 remainder (which can be called v-Shift) is an enumeration (ENUMERATED) with a range of values: n0, n1, n2, n3, n4, n5.

[0071] Some information in the neighbor cell CRS assist information and the second mode CRS pattern information is similar. In some embodiments, one or more items of information in the CRS-related information of each of one or more neighbor cells of the second mode may be missing, and the missing information items may be determined according to the second mode CRS pattern information.

[0072] For example, in the second mode, if the neighbor cell is missing downlink carrier bandwidth (which can be called neighCarrierBandwidthDL-r17), the terminal: Corresponding to adjacent cells in the second mode Apply the value of the downlink carrier bandwidth (which can be referred to as carrierBandwidthDL) in the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS);

[0073] In the second mode, if the neighboring cell has a missing downlink carrier frequency (which can be called neighCarrierFreqDL-r17), the terminal: Corresponding to adjacent cells in the second mode Apply the value of the downlink carrier frequency (which can be called carrierFreqDL) of the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS);

[0074] In the second mode neighbor cell, if the MBSFN subframe configuration (which can be called neighMBSFN-SubframeConfigList-r17) is missing, the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS) Corresponding to adjacent cells in the second mode If an MBSFN subframe configuration (which can be referred to as mbsfn-SubframeConfigList) is configured, the terminal applies the value of the MBSFN subframe configuration in the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS); otherwise, the terminal applies the value of the MBSFN subframe configuration in the LTE neighboring cell. (Neighboring cell in second mode) Assume that no MBSFN is configured;

[0075] In the second mode neighbor cell, if the number of CRS ports (which can be called neighNrofCRS-Port-r17) is missing, the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS) Corresponding to adjacent cells in the second mode If the number of CRS ports (which may be referred to as nrofCRS-Port) is configured, the terminal applies the value of the number of CRS ports (which may be referred to as nrofCRS-Port) in the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS), otherwise the terminal applies the default value n4.

[0076] In some embodiments, the terminal may adopt a default network configuration for each of one or more neighboring cells in the second mode. For example, in Scenario 1, the number of CRS ports for each of one or more neighboring cells in the second mode may be: corresponding to each of one or more neighboring cells in the second mode. is the same as the number of CRS ports (which can be called nrofCRS-Port) in the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS), and in scenario 2, the number of CRS ports of each of one or more neighboring cells in the second mode is 4.

[0077] In another example, for scenario 1, the channel bandwidth (downlink carrier bandwidth, which may be referred to as neighCarrierBandwidthDL-r17) and center frequency (downlink carrier frequency, which may be referred to as neighCarrierFreqDL-r17) of each of the one or more neighboring cells in the second mode are: corresponding to each of one or more neighboring cells in the second mode. The second mode CRS pattern information (for example, RateMatchPatternLTE-CRS) matches the downlink carrier bandwidth and downlink carrier frequency.

[0078] For another example, in Scenario 1, the MBSFN subframe configuration of each of the one or more neighboring cells in the second mode is: corresponding to each of one or more neighboring cells in the second mode. It matches the MBSFN subframe configuration in the second mode CRS pattern information (for example, RateMatchPatternLTE-CRS), and in scenario 2, MBSFN is not configured.

[0079] In another example, network-based CRS interference mitigation is not enabled in scenario 1 and scenario 2.

[0080] The above scenario 1 is a DSS scenario, in which the serving cell sends second mode CRS pattern information (e.g., RateMatchPatternLTE-CRS) to the terminal, and scenario 2 is a non-DSS scenario, in which the serving cell does not send second mode CRS pattern information (e.g., RateMatchPatternLTE-CRS) to the terminal.

[0081] In the above-described embodiment, both the related content that one or more items of information missing from the CRS-related information of each of the one or more neighboring cells in the second mode can be determined according to the second mode CRS pattern information and the related content that the terminal can adopt a default network configuration of each of the one or more neighboring cells in the second mode belong to the default network configuration information.

[0082] In some embodiments, when the CRS pattern information of the second mode includes configuration information of multiple CRSs, the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify the configuration information of the CRS corresponding to each CRS of the one or more neighboring cells in the second mode, and the index corresponds to the index order of the configuration information of each of the multiple CRSs.

[0083] For example, since the second mode CRS pattern information includes configuration information of two CRSs and the neighboring cell CRS assist information includes CRS-related information of four neighboring cells in the second mode, it is necessary to indicate which CRS of the neighboring cells in the second mode corresponds to the configuration information of the first CRS and which CRS of the neighboring cells in the second mode corresponds to the configuration information of the second CRS.

[0084] Alternatively, when the configuration information of the CRS corresponding to each of the one or more cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 remainder for each of the one or more cells in the second mode, the CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 remainder for each of the one or more neighboring cells in the second mode.

[0085] Alternatively, when the configuration information of the CRS corresponding to each of the one or more cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, an MBSFN subframe configuration, a number of CRS ports, and a physical cell identifier modulo 6 remainder for each of the one or more cells in the second mode, the CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, an MBSFN subframe configuration, a number of CRS ports, and a physical cell identifier modulo 6 remainder for each of the one or more neighboring cells in the second mode.

[0086] By configuring the index or forcing the CRS-related information of each of the one or more neighboring cells in the second mode to include information consistent with the configuration information of the corresponding CRS, it is possible to avoid the problem that the terminal cannot accurately determine the CRS-related information of each of the one or more neighboring cells in the second mode, which results in failure to implement interference mitigation.

[0087] In some embodiments, the CRS-related information of each of the one or more neighboring cells in the second mode is used to indicate whether the CRS-related information of each of the one or more neighboring cells in the second mode satisfies the default network configuration information. 2The neighbor cell CRS assist information includes an indication of whether the CRS-related information of one or more neighbor cells in the second mode satisfies the default network configuration information. 3 For example, the first 3 The indication information is the lte-NeighCellsCRS-Assumptions field. If this field is not configured, the default network configuration is valid for all LTE neighbor cells. If this field is configured (i.e., false) and LTE-neightcellscrs-AssistInfoList-r17 is configured, the configuration provided in LTE-neightcellscrs-AssistInfoList-r17 overrides the default network configuration.

[0088] Furthermore, the first mode determines that the CRS-related information of each of the one or more neighboring cells in the second mode does not satisfy the default network configuration information. 2 If the indication information indicates that the CRS-related information of one or more neighboring cells in the second mode does not satisfy the default network configuration information, 3 When the instruction information indicates 2 Instruction information or 3 The indication information may disable interference mitigation operations for the CRS of one or more neighboring cells in the second mode. The end It is also used to indicate the end.

[0089] Through the above information, the terminal is advised to disable interference mitigation operations for the CRS of neighboring cells to avoid performance degradation caused by incorrect assumptions of the terminal. Finger (This function may also not be disabled, and the terminal detects the CRS information of neighboring cells in the second mode by itself when the function is not disabled.)

[0090] In step S106, the terminal performs interference mitigation according to the neighboring cell CRS assist information.

[0091] In some embodiments, the terminal enables interference mitigation operations for the CRS of one or more neighboring cells in the second mode according to the neighboring cell CRS assist information to perform interference detection and interference mitigation.

[0092] The neighboring cell CRS assist information may implicitly instruct the terminal to enable interference mitigation operations for the CRS of one or more neighboring cells in the second mode, or the CRS rate match (LTE-CRS-ToMatchAround) signaling for the second mode may implicitly indicate to the terminal to enable interference mitigation operations for the CRS of one or more neighboring cells in the second mode, or the base station may 4 The base station transmits the instruction information to the terminal, and in response to this, the terminal receives the instruction information from the base station. 4 receive instruction information and 4 The indication information is used to indicate to the terminal to enable interference mitigation operations for CRSs of one or more neighboring cells in the second mode.

[0093] No. 4 The indication information is carried by radio resource control (RRC) signaling. If the terminal supports CRS interference mitigation of one or more neighboring cells in the second mode, the base station can instruct the terminal to enable CRS interference mitigation of one or more neighboring cells in the second mode as described above. The base station also 4 Through the indication information, the terminal may also be instructed to disable CRS interference mitigation of one or more neighboring cells in the second mode.

[0094] In some embodiments, the base station also sends release information of neighboring cell CRS assist information to the terminal, and in response, the terminal receives the release information of neighboring cell CRS assist information sent from the base station, and the terminal deletes the stored neighboring cell CRS assist information according to the release information of neighboring cell CRS assist information.

[0095] In the above embodiment, the first mode and the second mode may be NR and LTE, respectively, which are suitable for DSS scenarios, i.e., the spectra of the first mode and the second mode overlap. A terminal located in a cell of the first mode reports to a base station whether it supports CRS interference mitigation of one or more neighboring cells of the second mode. The neighboring cell CRS assist information transmitted from the base station and received by the terminal includes CRS-related information of one or more neighboring cells of the second mode. The terminal then performs interference mitigation according to the neighboring cell CRS assist information, thereby reducing the terminal's energy consumption in interference detection of the CRS of one or more neighboring cells of the second mode and improving the reliability and accuracy of terminal or downlink reception through interference mitigation.

[0096] In the method of the above embodiment, the base station determines whether to configure related RRC instruction signaling for the terminal according to the capability of "supporting CRS interference mitigation of one or more neighboring cells in the second mode" reported by the terminal and the deployment status of one or more neighboring cells in the second mode. The RRC instruction signaling can enable the terminal to perform interference mitigation operations for the CRS of one or more neighboring cells in the second mode when the terminal receives downlink data. The base station can also additionally send neighboring cell CRS configuration information (neighboring cell CRS assist information) to the terminal through RRC signaling to assist the terminal in performing interference detection and then interference mitigation for one or more neighboring cells in the second mode at corresponding locations. To avoid possible misinterpretation of the signaling by the terminal side, additional RRC signaling transmission rules are defined when there is information that needs to be transmitted about multiple neighboring cells in the second mode. At the same time, NR and LTE The overlapping spectra ofare not aligned in the frequency domain, a frequency domain deviation value is transmitted to assist in interference cancellation. The method of the above embodiment helps to significantly improve the reliability of downlink data reception for a terminal operating in a scenario where NR and LTE coexist while supporting CRS interference mitigation of neighboring cells.

[0097] This disclosure also presents a terminal, which is described below with reference to FIG.

[0098] 2 is a structural diagram of some embodiments of the terminal of the present disclosure. As shown in FIG. 2, the terminal 20 of the embodiment includes a transmitting module 210, a receiving module 220, and an interference mitigation module 230.

[0099] The transmitting module 210 is configured to report cell-specific reference signal (CRS) interference mitigation capability information to the base station, where the CRS interference mitigation capability information is configured to indicate whether a terminal in a cell of a first mode supports CRS interference mitigation of an adjacent cell of a second mode in a scenario where the spectra of the first mode and the second mode overlap. The transmitting module can be realized by employing a transmitter of the terminal.

[0100] The receiving module 220 is configured to receive neighboring cell CRS assist information sent from the base station, where the neighboring cell CRS assist information includes CRS-related information of one or more neighboring cells in the second mode. The receiving module can be realized by adopting a receiver of the terminal.

[0101] The interference mitigation module 230 is configured to perform interference mitigation according to the neighboring cell CRS assist information. The interference mitigation module can be realized by employing a controller of the terminal.

[0102] In some embodiments, the interference mitigation module 230 is configured to enable interference mitigation operations for the CRSs of one or more neighboring cells in the second mode according to the neighboring cell CRS assist information, and to perform interference detection and interference mitigation.

[0103] In some embodiments, the receiving module 220 is also configured to receive second mode CRS pattern information transmitted from the base station, where the second mode CRS pattern information includes configuration information of one or more CRSs corresponding to one or more cells of the second mode.

[0104] In some embodiments, the receiving module 220 also receives the first transmitted signal from the base station. 4 and configured to receive an indication of the 4 The indication information is configured to indicate to the terminal to enable interference mitigation operations for CRSs of one or more neighboring cells in the second mode.

[0105] In some embodiments, the receiving module 220 is also configured to receive neighbor cell CRS assist information release information transmitted from the base station, and the terminal 20 further includes a deletion module configured to delete the stored neighbor cell CRS assist information according to the neighbor cell CRS assist information release information.

[0106] The specific content and form of the various information may be subject to the foregoing interference. relief Reference can be made to the method embodiment, which will not be further described here.

[0107] The present disclosure also presents a base station, which is described below with reference to FIG.

[0108] 3 is a structural diagram of some embodiments of the base station of the present disclosure. As shown in FIG. 3, the base station 30 of this embodiment includes a receiving module 310 and a transmitting module 320.

[0109] The receiving module 310 is configured to receive cell-specific reference signal (CRS) interference mitigation capability information reported by a terminal, the CRS interference mitigation capability information being configured to indicate whether a terminal in a cell of a first mode supports CRS interference mitigation of a neighboring cell of a second mode in a scenario where the spectrum of the first mode and the spectrum of the second mode overlap. The receiving module can be realized by employing a receiver of a base station.

[0110] The transmitting module 320 is configured to transmit neighboring cell CRS assist information to the terminal, where the neighboring cell CRS assist information includes CRS-related information of one or more neighboring cells in the second mode, for assisting the terminal in performing interference mitigation on the CRS of the one or more neighboring cells in the second mode. The transmitting module can be realized by adopting a transmitter of the base station.

[0111] In some embodiments, the transmitting module 320 is also configured to transmit second mode CRS pattern information to the terminal, where the second mode CRS pattern information includes configuration information of one or more CRSs corresponding to one or more cells of the second mode.

[0112] In some embodiments, the transmission module 320 also transmits the first 4 and also configured to transmit instruction information for this 4 The indication information is configured to indicate to the terminal to enable interference mitigation operations for CRSs of one or more neighboring cells in the second mode.

[0113] The specific content and form of the various information may be subject to the foregoing interference. relief Reference can be made to the method embodiment, which will not be further described here.

[0114] The communication devices (terminals and / or base stations) of the disclosed embodiments may be implemented by various computing devices or computer systems, which are described below with reference to FIGS.

[0115] 4 is a structural diagram of some embodiments of a communication device of the present disclosure. As shown in FIG. 4, the device 40 of the embodiment includes a memory 410 and a processor 420 coupled to the memory 410, and the processor 420 is configured to perform the interference mitigation method of any embodiment of the present disclosure based on instructions stored in the memory 410.

[0116] The memory 410 may include, for example, system memory, fixed non-volatile storage media, etc. The system memory stores, for example, an operating system, application programs, boot loaders, databases, and other programs.

[0117] FIG. 5 is a structural diagram of another embodiment of a communication device of the present disclosure. As shown in FIG. 5, the device 50 of the embodiment includes a memory 510 and a processor 520, which are similar to the memory 410 and the processor 420, respectively. An input / output interface 530, a network interface 540, a storage interface 550, and the like may also be included. These interfaces 530, 540, and 550 may be connected to the memory 510 and the processor 520 via, for example, a bus 560. The input / output interface 530 provides a connection interface for input / output devices such as a display, a mouse, a keyboard, and a touchscreen. The network interface 540 provides a connection interface for various network devices, such as a database server or a cloud storage server. The storage interface 550 provides a connection interface for external storage devices such as an SD card or a USB flash drive.

[0118] This disclosure also presents an interference mitigation system, which is described below with reference to FIG.

[0119] 6 is a structural diagram of some embodiments of the interference mitigation system of the present disclosure. As shown in FIG. 6, the system of the embodiment includes the terminal 20 of any of the above-mentioned embodiments and the base station 30 and equipped.

[0120] It should be understood by those skilled in the art that embodiments of the present disclosure may be provided as a method, a system, or a 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 in one or more computer-usable non-transitory storage media (including, but not limited to, disk storage devices, CD-ROMs, optical storage devices, etc.) that contain computer-usable program code.

[0121] The present disclosure has been described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each flow and / or block of the flowcharts and / or block diagrams, and combinations of flows and / or blocks of the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, such that the instructions, executed by the processor of the computer or other programmable data processing device, produce a device for implementing the functions specified in the flowchart flows and / or block diagram blocks.

[0122] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, thereby creating an article of manufacture that includes an instruction device that implements the functions specified in the flowchart flows and / or block diagram blocks, where the instructions stored in the computer-readable memory.

[0123] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus, whereby a series of operational steps are performed on the computer or other programmable apparatus to create a computer-implemented process, whereby the instructions executing on the computer or other programmable apparatus provide the steps for achieving the functions specified in the flowchart flows and / or block diagram blocks.

[0124] The above is merely a preferred embodiment of the present disclosure and is not used to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. 1. A method of interference mitigation performed by a terminal, comprising: reporting cell-specific reference signal (CRS) interference mitigation capability information to a base station, the CRS interference mitigation capability information being used to indicate whether the terminal in a cell of the first mode supports the CRS interference mitigation of a neighboring cell of the second mode in a scenario where spectra of a first mode and a second mode overlap; receiving neighboring cell CRS assist information transmitted from the base station, the neighboring cell CRS assist information including CRS-related information of one or more neighboring cells in the second mode; performing interference mitigation according to the neighboring cell CRS assist information; A method comprising:

2. 2. The interference mitigation method of claim 1, wherein the CRS-related information of each of the one or more neighboring cells in the second mode includes at least one of first indication information or a frequency-domain deviation value, the first indication information being used to indicate whether overlapped spectrums of each of the one or more neighboring cells in the second mode and the cell in the first mode are aligned in the frequency domain, and the frequency-domain deviation value being a frequency-domain deviation value of the overlapped spectrums of each of the one or more neighboring cells in the second mode and the cell in the first mode.

3. 3. The interference mitigation method according to claim 1, wherein when the neighboring cell CRS assist information includes the CRS-related information of a plurality of neighboring cells in the second mode, the CRS-related information of each of the plurality of neighboring cells in the second mode includes a physical cell identifier of each of the plurality of neighboring cells in the second mode.

4. 4. The interference mitigation method according to claim 1, further comprising receiving second mode CRS pattern information transmitted from the base station, wherein the second mode CRS pattern information includes configuration information of one or more CRSs corresponding to one or more cells of the second mode.

5. 5. The interference mitigation method of claim 4, wherein, when the second mode CRS pattern information includes configuration information of a plurality of CRSs, the configuration information of the CRS corresponding to each cell in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 remainder of the each cell in the second mode, and the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of a CRS corresponding to each CRS of the one or more neighboring cells in the second mode, or the CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 remainder of the each of the one or more neighboring cells in the second mode.

6. When the second mode CRS pattern information includes configuration information of a plurality of CRSs, the configuration information of the CRS corresponding to each cell in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a multicast broadcast single frequency network (MBSFN) subframe configuration, the number of CRS ports, and a physical cell identifier modulo 6 remainder of the each cell in the second mode; 6. The interference mitigation method according to claim 4, wherein the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify the configuration information of a CRS corresponding to the CRS of each of the one or more neighboring cells in the second mode, or the CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, an MBSFN subframe configuration, a number of CRS ports, and a physical cell identifier modulo 6 remainder of each of the one or more neighboring cells in the second mode.

7. The interference mitigation method according to claim 5 or 6, wherein the index corresponds to an index order of configuration information of each of the plurality of CRSs.

8. The CRS-related information of each of the one or more neighboring cells in the second mode includes third indication information used to indicate whether the CRS-related information of each of the one or more neighboring cells in the second mode satisfies default network configuration information; or 8. The interference mitigation method according to claim 1, wherein the neighboring cell CRS assist information further includes fourth indication information used to indicate whether the CRS-related information of the one or more neighboring cells in the second mode satisfies default network configuration information.

9. 9. The interference mitigation method according to claim 8, wherein, when the third indication information indicates that the CRS-related information of each of the one or more neighboring cells in the second mode does not satisfy the default network configuration information, or when the fourth indication information indicates that the CRS-related information of each of the one or more neighboring cells in the second mode does not satisfy the default network configuration information, the third indication information or the fourth indication information is also used to implicitly indicate to the terminal to disable interference mitigation operations for the CRS of the one or more neighboring cells in the second mode.

10. 10. The interference mitigation method according to claim 2, wherein the CRS-related information of each of the one or more neighboring cells in the second mode further includes at least one of a physical cell identifier, a remainder of the physical cell identifier modulo 6, a slot number, dual mode indication information, an uplink / downlink subframe ratio, a cyclic prefix type indication information, a downlink carrier frequency, a downlink carrier bandwidth, a Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration, a number of CRS ports, or CRS muting indication information of each of the one or more neighboring cells in the second mode.

11. performing interference mitigation according to the neighboring cell CRS assist information, 11. The interference mitigation method according to claim 1, further comprising: enabling an interference mitigation operation for the CRS of the one or more neighboring cells in the second mode according to the neighboring cell CRS assist information to perform interference detection and interference mitigation, wherein the neighboring cell CRS assist information or CRS rate match signaling in the second mode implicitly indicates to the terminal that the interference mitigation operation for the CRS of the one or more neighboring cells in the second mode is enabled.

12. 12. The interference mitigation method according to claim 1, further comprising receiving fifth instruction information transmitted from the base station, the fifth instruction information being used to indicate to the terminal to enable interference mitigation operations for the CRS of the one or more neighboring cells in the second mode.

13. The interference mitigation method of claim 12 , wherein the fifth indication information is carried by radio resource control (RRC) signaling.

14. receiving release information of the neighboring cell CRS assist information transmitted from the base station; Deleting the stored neighboring cell CRS assist information according to the release information of the neighboring cell CRS assist information; The method of any one of claims 1 to 13, further comprising:

15. The interference mitigation method of any one of claims 1 to 14, wherein the neighbor cell CRS assistance information is carried by Radio Resource Control (RRC) signaling.

16. 16. The interference mitigation method according to claim 1, wherein, when the neighboring cell CRS assist information includes the CRS-related information of a plurality of neighboring cells in the second mode, the CRS-related information of each of the plurality of neighboring cells in the second mode includes a physical cell identifier of each of the plurality of neighboring cells in the second mode or a remainder of the physical cell identifier modulo 6.

17. 1. A method of interference mitigation performed by a base station, comprising: receiving cell-specific reference signal (CRS) interference mitigation capability information reported by a terminal, the CRS interference mitigation capability information being used to indicate whether the terminal in a cell of a first mode supports the CRS interference mitigation of a neighboring cell of a second mode in a scenario where spectra of a first mode and a second mode overlap; Transmitting neighbor cell CRS assist information to the terminal, the neighbor cell CRS assist information including CRS-related information of the one or more neighbor cells in the second mode, for assisting the terminal in performing interference mitigation for CRSs of the one or more neighbor cells in the second mode; An interference mitigation method comprising:

18. 18. The interference mitigation method of claim 17, wherein the CRS-related information of each of the one or more neighboring cells in the second mode includes at least one of first indication information or a frequency-domain deviation value, the first indication information being used to indicate whether overlapped spectrums of each of the one or more neighboring cells in the second mode and the cell in the first mode are aligned in the frequency domain, and the frequency-domain deviation value being a frequency-domain deviation value of the overlapped spectrums of each of the one or more neighboring cells in the second mode and the cell in the first mode.

19. 19. The interference mitigation method according to claim 17 or 18, wherein when the neighboring cell CRS assist information includes the CRS-related information of a plurality of neighboring cells in the second mode, the CRS-related information of each of the plurality of neighboring cells in the second mode includes a physical cell identifier of each of the plurality of neighboring cells in the second mode or a remainder of the physical cell identifier modulo 6.

20. 20. The interference mitigation method according to claim 17, further comprising transmitting second mode CRS pattern information to the terminal, the second mode CRS pattern information including configuration information of one or more CRSs corresponding to one or more cells of the second mode.

21. 21. The method of claim 20, wherein, when the second mode CRS pattern information includes configuration information of a plurality of CRSs, the configuration information of the CRS corresponding to each cell in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 remainder of the each cell in the second mode; the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of a CRS corresponding to each CRS of the one or more neighboring cells in the second mode; or a group of CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a number of CRS ports, and a physical cell identifier modulo 6 remainder of the each of the one or more neighboring cells in the second mode.

22. When the second mode CRS pattern information includes configuration information of a plurality of CRSs, the configuration information of the CRS corresponding to each cell in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, a multicast broadcast single frequency network (MBSFN) subframe configuration, the number of CRS ports, and a physical cell identifier modulo 6 remainder of the each cell in the second mode; 21. The interference mitigation method of claim 20, wherein the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of a CRS corresponding to the CRS of each of the one or more neighboring cells in the second mode, or the CRS-related information of each of the one or more neighboring cells in the second mode includes an index used to identify configuration information of a CRS corresponding to the CRS of each of the one or more neighboring cells in the second mode, or a group of CRS-related information of each of the one or more neighboring cells in the second mode includes a downlink carrier frequency, a downlink carrier bandwidth, an MBSFN subframe configuration, a number of CRS ports, and a physical cell identifier modulo 6 remainder of each of the one or more neighboring cells in the second mode.

23. The CRS-related information of each of the one or more neighboring cells in the second mode includes third indication information used to indicate whether a group of CRS-related information of each of the one or more neighboring cells in the second mode satisfies default network configuration information; or 23. The interference mitigation method according to claim 17, wherein the neighboring cell CRS assist information further includes fourth indication information used to indicate whether one or more groups of related information of the CRS of the one or more neighboring cells in the second mode satisfy the default network configuration information.

24. 24. The interference mitigation method according to claim 23, wherein, when the third indication information indicates that a group of related information of the CRS of each of the one or more neighboring cells in the second mode does not satisfy the default network configuration information, or when the fourth indication information indicates that one or more groups of related information of the CRS of the one or more neighboring cells in the second mode does not satisfy the default network configuration information, the third indication information or the fourth indication information is also used to implicitly indicate to the terminal to disable interference mitigation operations for the CRS of the one or more neighboring cells in the second mode.

25. 25. The interference mitigation method according to claim 17, further comprising transmitting fifth instruction information transmitted from the base station, the fifth instruction information being used to indicate to the terminal to enable interference mitigation operations for the CRS of the one or more neighboring cells in the second mode.

26. a transmitting module configured to report cell-specific reference signal (CRS) interference mitigation capability information to a base station, the CRS interference mitigation capability information being used to indicate whether a terminal in a cell of a first mode supports the CRS interference mitigation of a neighboring cell of a second mode in a scenario where spectra of a first mode and a second mode overlap; and a receiving module configured to receive neighboring cell CRS assist information transmitted from the base station, the neighboring cell CRS assist information including CRS-related information of one or more neighboring cells in the second mode; and an interference mitigation module configured to perform interference mitigation according to the neighboring cell CRS assist information; A terminal comprising:

27. a receiving module configured to receive cell-specific reference signal (CRS) interference mitigation capability information reported by a terminal, the CRS interference mitigation capability information being used to indicate whether the terminal in a cell of a first mode supports the CRS interference mitigation of a neighboring cell of a second mode in a scenario where spectra of a first mode and a second mode overlap; a transmitting module configured to transmit neighboring cell CRS assist information to the terminal, the neighboring cell CRS assist information including CRS-related information of the one or more neighboring cells in the second mode to assist the terminal in performing interference mitigation on CRSs of the one or more neighboring cells in the second mode; and A base station comprising:

28. An interference mitigation system comprising a terminal according to claim 26 and a base station according to claim 27.

29. a processor; a memory coupled to said processor for storing instructions which, when executed by said processor, cause said processor to perform the interference mitigation method of any one of claims 1 to 25; A communication device comprising:

30. 26. A non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, causes the processor to perform the interference mitigation method of any one of claims 1 to 25.

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