Communication control method and device, computer storage medium and electronic equipment

Abstract

The application belongs to the technical field of 5G and 5G+ mobile communication, and relates to a communication control method, device, storage medium and electronic equipment. The method is applied to a DSS base station, and comprises the following steps: acquiring adjacent area LTE CRS port information, constructing a new radio (NR) downlink resource distribution map based on the adjacent area LTE CRS port information; determining a zero power channel state reference signal (ZP CSI-RS) detection window according to the adjacent area LTE CRS port information and the NR downlink resource distribution map, sending the ZP CSI-RS detection window to an NR terminal, triggering the NR terminal to perform adjacent area LTE CRS interference detection on a ZP CSI-RS signal corresponding to the ZP CSI-RS detection window; receiving an LTE CRS interference detection result sent by the NR terminal, determining a target rate matching (RM) mode according to the LTE CRS interference detection result, and eliminating adjacent area LTE CRS interference signals according to the target RM mode. The application can adaptively switch between RE-level RM modes and symbol-level RM modes, eliminates LTE CRS interference and improves NR downlink efficiency.

Description

Technical Field

[0001] This application relates to the field of communication control technology, and in particular to a communication control method, a communication control device, a computer-readable storage medium, and an electronic device. Background Technology

[0002] Dynamic spectrum sharing (DSS) technology enables networks of different standards to share the same frequency band and dynamically allocates bandwidth to different network standards according to demand, making full use of spectrum resources. For example, Long Term Evolution (LTE) based on 4G networks and New Radio (NR) based on 5G networks can achieve spectrum sharing through DSS technology.

[0003] However, in the DSS field test on a certain carrier frequency, it was found that the Cell-specific Reference Signal (LTECRS) of the neighboring Long Term Evolution (LTE) cell can cause some interference to the signal transmission of the Physical Downlink Shared Channel (PDSCH) of 5G NR terminals. Moreover, the magnitude of the interference changes with the location of the NR terminal and the obstruction and scattering of the LTE CRS signal from the neighboring cell. This makes it impossible to fully utilize the resource element RE of the PDSCH due to the presence of LTE CRS interference, which seriously affects the performance of the DSS or NR network and the experience of NR terminal users.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application. Summary of the Invention

[0005] The purpose of this application is to provide a communication control method, a communication control device, a computer-readable storage medium, and an electronic device, thereby at least to some extent avoiding the impact of LTE CRS interference on NR downlink performance and improving the experience of NR terminal users.

[0006] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0007] According to a first aspect of this application, a communication control method is provided, applied to a Dynamic Spectrum Sharing (DSS) base station, comprising: acquiring LTE CRS port information of a neighboring Long Term Evolution (LTE) cell; constructing a New Radio (NR) downlink resource distribution map based on the neighboring cell LTE CRS port information; determining a Zero Power Channel State Reference (ZP CSI-RS) detection window based on the neighboring cell LTE CRS port information and the NR downlink resource distribution map; sending the ZP CSI-RS detection window to an NR terminal; triggering the NR terminal to perform neighboring cell LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window; receiving the LTE CRS interference detection result sent by the NR terminal; determining a target rate matching (RM) mode based on the LTE CRS interference detection result; and eliminating the neighboring cell LTE CRS interference signal according to the target RM mode.

[0008] According to a second aspect of this application, a communication control device is provided, configured in a DSS base station, comprising: an interference signal map construction module, configured to acquire LTE CRS port information of a neighboring Long Term Evolution (LTE) cell, and construct a New Radio (NR) downlink resource distribution map based on the neighboring LTE CRS port information; a detection window determination module, configured to determine a Zero Power Channel State Reference Signal (ZP CSI-RS) detection window based on the neighboring LTE CRS port information and the NR downlink resource distribution map, send the ZP CSI-RS detection window to an NR terminal, and trigger the NR terminal to perform neighboring LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window; and an interference cancellation module, configured to receive the LTE CRS interference detection result sent by the NR terminal, determine a target rate matching (RM) mode based on the LTE CRS interference detection result, and cancel the neighboring LTE CRS interference signal according to the target RM mode.

[0009] According to a third aspect of this application, a computer storage medium is provided, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the above-described communication control method.

[0010] According to a fourth aspect of this application, an electronic device is provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the above-described communication control method by executing the executable instructions.

[0011] As can be seen from the above technical solutions, the communication control method, communication control device, computer-readable storage medium, and electronic device in the exemplary embodiments of this application have at least the following advantages and positive effects:

[0012] The communication control method in this embodiment involves the DSS base station acquiring neighboring cell LTE CRS port information and constructing an NR downlink resource distribution map based on this information. Next, it determines a Zero Power Channel State Reference Signal (ZP CSI-RS) detection window based on the LTE CRS port information and the NR downlink resource distribution map, and sends the ZP CSI-RS detection window to the NR terminal, triggering the NR terminal to perform LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window. Finally, it receives the LTE CRS interference detection result sent by the NR terminal, determines the target rate matching (RM) method based on the result, and eliminates the neighboring cell LTE CRS interference signal according to the target RM method. This communication control method can eliminate LTE CRS interference signals, ensuring full utilization of the NR PDSCH RE resources, thereby improving the NR downlink rate, enhancing user experience, improving DSS network performance and resource utilization, and reducing the construction, operation, and maintenance costs of DSS equipment.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0015] Figure 1 The diagram illustrates the system architecture of the communication control method applied in an embodiment of this application.

[0016] Figure 2 The schematic diagram illustrates a flowchart of the communication control method in an embodiment of this application.

[0017] Figure 3 The schematic diagram illustrates the interface of the initial NR downlink resource distribution map in an embodiment of this application.

[0018] Figure 4 The illustration shows the distribution of NR downlink resources containing LTE CRS interference signals when the LTE CRS port information in this embodiment of the application is two ports.

[0019] Figure 5The illustration shows the NR downlink resource distribution diagram containing LTE CRS interference signals when the LTE CRS port information is four ports in an embodiment of this application.

[0020] Figure 6 This illustration schematically shows an embodiment based on... Figure 4 The diagram shows the interface of the ZPCSI-RS detection window determined by the NR downlink resource distribution map.

[0021] Figure 7 This illustration schematically shows an embodiment based on... Figure 5 The diagram shows the interface of the ZPCSI-RS detection window determined by the NR downlink resource distribution map.

[0022] Figures 8A-8C The schematic diagram illustrates the interface for interference cancellation based on the target RM method in an embodiment of this application.

[0023] Figures 9A-9C The schematic diagram illustrates the interface for interference cancellation based on the target RM method in an embodiment of this application.

[0024] Figure 10 The diagram illustrates the interaction flow of the communication control method in an embodiment of this application.

[0025] Figure 11 The schematic diagram illustrates the structure of the communication control device in an embodiment of this application.

[0026] Figure 12 A schematic diagram of a computer system architecture suitable for implementing the embodiments of this application is shown. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0028] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0029] The terms “a,” “an,” “the,” and “the” are used in this specification to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first” and “second” are used only as markings and are not a limitation on the number of objects.

[0030] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0031] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0032] In related technologies in this field, when 4G LTE and 5G NR dynamically share spectrum, the downlink signal of the NR terminal will be interfered with by LTE CRS. The magnitude of the interference will vary with the location of the NR terminal and the obstruction and scattering of the LTE CRS interference signal. Different rate matching methods are required for different levels of interference. For example, when the NR terminal is at a mid-far or far point relative to the DSS base station, it is subject to strong interference from neighboring LTE CRS. If the RE-level RM method is used to remove the interference, the efficiency is low and the accuracy is poor, causing a sharp drop in the downlink rate of the NR terminal. When the NR terminal is at a mid-near or near point relative to the DSS base station, it is subject to weaker interference from neighboring LTE CRS. If the symbol-level RM method is used to remove the interference, the entire symbol resource of the LTE CRS corresponding to the NR PDSCH cannot be used, resulting in a serious waste of RE resources.

[0033] Although a suitable rate matching method can be selected based on the distance, when the LTE CRS interference signal is blocked or scattered, even if the NR terminal is far away from the DSS base station, the LTE CRS interference it receives is relatively weak. If the symbol-level RM method is used for interference removal, it will result in a serious waste of RE resources.

[0034] To address the technical problems existing in related technologies, this application proposes a communication control method. By adaptively switching between RE-level RM mode and symbol-level RM mode, it balances LTE CRS interference cancellation and full utilization of NR PDSCH resources, thereby improving NR downlink rate, enhancing DSS network performance and resource utilization, reducing DSS equipment construction, operation and maintenance costs, and improving user experience. Before providing a detailed description of the technical solutions in this application, the technical terms that may be involved in this application will first be explained and clarified.

[0035] (1) LTE: Long Term Evolution, is the long-term evolution of the UMTS (Universal Mobile Telecommunications System) technical standard developed by the 3GPP (The 3rd Generation Partnership Project) organization.

[0036] (2) NR: New Radio, which is the wireless network of 5G. 5G NR is a global 5G standard based on OFDM (Orthogonal Frequency Division Multiplexing) and a very important foundation for the next generation of cellular mobile technology.

[0037] (3) DSS: Dynamic spectrum sharing, a technology that enables networks of different standards to share the same frequency band and dynamically allocates bandwidth to different network standards according to demand, so as to make full use of spectrum resources.

[0038] (4) CRS: Cell-specific Reference Signal (also called common reference signal) is used for channel estimation and correlation demodulation of all downlink transmission technologies except for beamforming techniques that are not based on codebooks.

[0039] (5) PCI: Physical Cell Identifier, which is used by LTE terminals to distinguish the radio signals of different cells.

[0040] (6) CSI-RS: Channel State Information Reference Signal, used for beamforming. It can be configured for a specific beam or NR terminal. The resource particles (REs) carrying CSI-RS can be configured as zero-power ZP CSI-RS or non-zero-power NZP CSI-RS. In the 5G network, the NR terminal reports the downlink channel state to the network through the monitoring of CSI-RS.

[0041] (7)RE: Resource Element, the smallest radio resource unit in LTE, and also the smallest unit carrying user information. It occupies 1 OFDM symbol in the time domain and 1 subcarrier in the frequency domain.

[0042] (8)RB: Resource Block, the smallest unit of resource allocation in the frequency domain for physical layer data transmission. It consists of 12 consecutive subcarriers in the frequency domain. Depending on the CP length, the number of OFDM symbols contained in each RB of LTE varies.

[0043] (9) PDCCH: Physical Downlink Control Channel, used to carry scheduling and other control information, including transmission format, resource allocation, uplink scheduling permission, power control and uplink retransmission information.

[0044] (10) PDSCH: Physical Downlink Shared Channel, used to carry data from the transport channel DSCH.

[0045] (11)DMRS: Demodulation Reference Signal, used in LTE for correlation demodulation of PUSCH and PUCCH channels.

[0046] (12) Rate matching: This refers to the process by which bits on the transmission channel are retransmitted or punctured to match the carrying capacity of the physical channel, so that the bit rate required by the transmission format is achieved during channel mapping.

[0047] After introducing the technical terms that may be involved in the embodiments of this application, the communication control method in this application will be described in detail.

[0048] Figure 1 A schematic diagram of the system architecture of a communication control system applying the technical solution of this application is shown.

[0049] like Figure 1As shown, the system architecture may include a DSS base station 101, an NR terminal 102, an LTE terminal 103, and a network. The DSS base station 101 is used to dynamically allocate spectrum resources for the 4G LTE network and the 5G NR network in the same frequency band to meet the traffic requirements of the NR terminal 102 and the LTE terminal 103 and ensure the optimal performance of the NR terminal 102 and the LTE terminal 103. The NR terminal 102 is used to request 5G network resources from the DSS base station 101. The LTE terminal 103 is used to request 4G network resources from the DSS base station 101. The network is a communication network used to provide data transmission links between the DSS base station 101 and the NR terminal 102, and between the DSS base station 101 and the LTE terminal 103.

[0050] The technical solutions provided in this application can be applied to DSS base stations, and of course, they can also be applied to NR terminals.

[0051] The communication control method in this application can be applied to any scenario involving dynamic spectrum sharing between 4G LTE and 5G NR based on DSS technology. The communication control method provided in this application will be described in detail below with reference to specific embodiments.

[0052] Figure 2 A flowchart of a communication control method is shown, which is applied to a DSS base station, which can be... Figure 1 DSS base station 101 in the middle, such as Figure 2 As shown, the communication control method includes:

[0053] Step S210: Obtain the LTE CRS port information of the specific reference signal of the neighboring Long Term Evolution cell, and construct a new air interface NR downlink resource distribution map based on the LTE CRS port information of the neighboring cell;

[0054] Step S220: Determine the zero-power channel state reference signal (ZP CSI-RS) detection window based on the neighboring cell LTE CRS port information and the NR downlink resource distribution map, send the ZP CSI-RS detection window to the NR terminal, and trigger the NR terminal to perform neighboring cell LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window;

[0055] Step S230: Receive the LTE CRS interference detection result sent by the NR terminal, determine the target rate matching (RM) mode based on the LTE CRS interference detection result, and eliminate the LTE CRS interference signal in the neighboring cell according to the target RM mode.

[0056] The communication control method of this application involves the DSS base station acquiring LTE CRS port information from neighboring cells and constructing an NR downlink resource distribution map based on this information. Next, it determines a Zero Power Channel State Reference Signal (ZP CSI-RS) detection window based on the LTE CRS port information and the NR downlink resource distribution map, and sends the ZP CSI-RS detection window to the NR terminal, triggering the NR terminal to perform LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window. Finally, it receives the LTE CRS interference detection result sent by the NR terminal, determines the target rate matching (RM) mode based on the result, and eliminates the LTE CRS interference signal from neighboring cells according to the target RM mode. This communication control method can eliminate LTE CRS interference signals, ensuring full utilization of the RE resources of the NR PDSCH, thereby improving the NR downlink rate, enhancing user experience, improving DSS network performance and resource utilization, and reducing the construction, operation, and maintenance costs of DSS equipment.

[0057] Next, for Figure 2 The steps of the communication control method shown are explained in detail.

[0058] In step S210, the LTE CRS port information of the neighboring Long Term Evolution (LTE) cell is obtained, and a new air interface (NR) downlink resource distribution map is constructed based on the neighboring cell LTE CRS port information.

[0059] In the exemplary embodiments of this application, regarding pilot signals, NR does not have a pilot signal with a fixed time-frequency location that is continuously transmitted. In contrast, the downlink cell common pilot of LTE, i.e., the cell-specific reference signal (CRS), needs to be continuously transmitted throughout the entire system bandwidth. Therefore, for LTE, the base station must transmit the downlink CRS, which not only increases pilot overhead but also raises the level of interference to neighboring cells. In scenarios where dynamic spectrum sharing between LTE and NR cells is achieved through DSS technology, since the LTE CRS interference signal will conflict with the NR PDSCH channel in both the time and frequency domains when LTE CRS interference signal is present, for the NR cell, neighboring cell LTE CRS will interfere with the NR terminal PDSCH channel, affecting the downlink rate of NR.

[0060] In an exemplary embodiment of this application, since the distribution of the cell reference signal CRS is related to the number of antenna ports, the distribution of LTE CRS is also related to the number of antenna ports corresponding to the LTE cell. Therefore, in order to accurately eliminate LTE CRS interference in the NR cell and improve the NR downlink rate, the LTE CRS port information of neighboring cells can be obtained, and an NR downlink resource distribution map can be constructed based on the LTE CRS port information of neighboring cells. Then, LTE CRS interference detection is performed based on the NR downlink resource distribution map, and the target rate matching method is determined based on the interference detection result to eliminate interference.

[0061] In an exemplary embodiment of this application, when constructing the NR downlink resource distribution map, it can be constructed based on an initial NR downlink resource distribution map, which is an NR downlink resource distribution map that does not consider LTE CRS interference. Figure 3 This schematically illustrates an interface diagram of the initial NR downlink resource distribution map, such as... Figure 3 As shown, the initial NR downlink resource distribution map contains information in both the time and frequency domains. The time domain contains 14 OFDM symbols, and the frequency domain contains 12 subcarriers. The OFDM symbols and subcarriers are numbered starting from 0. The initial NR downlink resource distribution map contains 168 resource particles (REs). The channels or signals configured on the resource particles (REs) corresponding to different OFDM symbols are not exactly the same. Specifically, OFDM symbols 0 and 1 are configured with LTE PDCCH channels, OFDM symbol 2 is configured with NR PDCCH channels, OFDM symbols 3 and 12 are configured with NR DMRS signals, OFDM symbol 13 is configured with NR NZP CSI-RS signals, and the REs corresponding to other OFDM symbols are configured with NR PDSCH channels.

[0062] When subjected to interference from neighboring LTE CRS, different methods are used to construct the NR downlink resource distribution map based on different LTE CRS port information. When the neighboring cell LTE CRS port information has two ports and LTE CRS interference signals exist, LTE CRS interference signals are configured in the first target RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol in the initial NR downlink resource distribution map to obtain the NR downlink resource distribution map. When the neighboring cell LTE CRS port information has four ports and LTE CRS interference signals exist, LTE CRS interference signals are configured in the second target RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol in the initial NR downlink resource distribution map to obtain the NR downlink resource distribution map. Among them, the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol are the same as some OFDM symbols corresponding to the NR PDSCH channel, and the second OFDM symbol and the fourth OFDM symbol are adjacent in the time domain. The positions of the first target RE and the second target RE are determined according to the remainder after taking the modulo 3 of the neighboring cell physical cell identifier (PCI) corresponding to the LTE CRS interference signal.

[0063] Specifically, the first OFDM symbol can be 4, the second OFDM symbol can be 7, the third OFDM symbol can be 11, and the fourth OFDM symbol can be 8.

[0064] When determining the first target RE, if the remainder is m, the RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol of the (m+1+3n)th subcarrier can be used as the first target RE, where m = 0, 1, 2, and n is a non-negative integer. When determining the second target RE, if the remainder is m, the RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol of the (m+1+3n)th subcarrier can be used as the second target RE, where m = 0, 1, 2, and n is a non-negative integer.

[0065] Figure 4 This diagram illustrates the distribution of NR downlink resources containing LTE CRS interference signals when the LTE CRS port information consists of two ports. Figure 4As shown, when m=0, LTE CRS interference signals are configured in the REs corresponding to OFDM symbols 4, 7, and 11 for the 1st, 4th, 7th, and 10th subcarriers. When m=1, LTE CRS interference signals are configured in the REs corresponding to OFDM symbols 4, 7, and 11 for the 2nd, 5th, 8th, and 11th subcarriers. When m=2, LTE CRS interference signals are configured in the REs corresponding to OFDM symbols 4, 7, and 11 for the 3rd, 6th, 9th, and 12th subcarriers.

[0066] Figure 5 This diagram illustrates the distribution of NR downlink resources containing LTE CRS interference signals when the LTE CRS port information is four ports. Figure 5 As shown, when m=0, LTE CRS interference signals are configured in the REs corresponding to OFDM symbols 4, 7, 8, and 11 for the 1st, 4th, 7th, and 10th subcarriers. When m=1, LTE CRS interference signals are configured in the REs corresponding to OFDM symbols 4, 7, 8, and 11 for the 2nd, 5th, 8th, and 11th subcarriers. When m=2, LTE CRS interference signals are configured in the REs corresponding to OFDM symbols 4, 7, 8, and 11 for the 3rd, 6th, 9th, and 12th subcarriers.

[0067] It is worth noting that in this embodiment, only the presence or absence of LTE CRS interference signals in the RE is considered, and the strength of the LTE CRS interference signals is not considered. Furthermore, the LTE CRS interference signals are evenly distributed. For example, if there is an LTE CRS interference signal in the RE corresponding to OFDM symbol 4 in the first subcarrier, then there must also be an LTE CRS interference signal in the RE corresponding to OFDM symbols 7, (8), and 11 in the first subcarrier. In addition, there are also LTE CRS interference signals in the RE corresponding to OFDM symbols 4, 7, (8), and 11 in the 4th, 7th, and 10th subcarriers.

[0068] In step S220, a zero-power channel state reference signal (ZP CSI-RS) detection window is determined based on the neighboring cell LTE CRS port information and the NR downlink resource distribution map. The ZP CSI-RS detection window is then sent to the NR terminal, triggering the NR terminal to perform neighboring cell LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window.

[0069] In an exemplary embodiment of this application, after determining the NR downlink resource distribution map, a ZP CSI-RS detection window can be determined in the NR downlink resource distribution map based on the LTE CRS port information. The NR terminal can detect whether there is LTE CRS interference from neighboring cells based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window.

[0070] In the exemplary embodiments of this application, the construction rules for the ZP CSI-RS detection window vary depending on the LTE CRS port information. When there are two LTE CRS ports, any one of the first target REs is used as the reference RE, and the position of the reference RE is used as the starting position. The ZP CSI-RS detection window is set with a width of 1 RE and a height of 3 REs. When there are four LTE CRS ports, any two time-domain adjacent REs in the second target REs are used as the reference REs, and the position of the reference RE is used as the starting position. The ZP CSI-RS detection window is set with a width of 2 REs and a height of 3 REs. It is worth noting that when determining the ZP CSI-RS detection window based on the reference RE, three REs can be determined from the reference RE along the positive direction of the frequency domain (vertical axis), or three REs can be determined along the negative direction of the frequency domain (vertical axis). This embodiment of the application does not specifically limit this.

[0071] Figure 6 Schematic illustration based on Figure 4 The diagram shows the interface of the ZP CSI-RS detection window determined by the NR downlink resource distribution map, as shown below. Figure 6 As shown, the RE corresponding to OFDM symbol 7 in the 5th subcarrier is used as the reference RE. Based on this reference RE, 3 REs are determined along the positive direction of the frequency domain. The ZP CSI-RS detection window when the LTE CRS port information is two ports can be determined, as shown by the black box in the figure.

[0072] Figure 7 Schematic illustration based on Figure 5 The diagram shows the interface of the ZP CSI-RS detection window determined by the NR downlink resource distribution map, as shown below. Figure 7 As shown, the REs corresponding to OFDM symbols 7, 8, and 1 in the 5th subcarrier are used as reference REs. Based on these reference REs, three REs are determined in the reverse direction of the frequency domain. This allows us to determine the ZP CSI-RS detection window when the LTE CRS port information has four ports, as shown by the black box in the figure.

[0073] It is worth noting that an NR terminal is usually subject to CRS interference from multiple LTE neighboring cells. Therefore, the LTE CRS interference signals configured in the NR downlink resource distribution map in this application embodiment are CRS interference signals from multiple LTE cells. If the PCI modulo 3 remainders of different LTE cells are the same, they are reflected at the same RE position in the NR downlink resource distribution map. If the PCI modulo 3 remainders of different LTE cells are different, they are reflected at different RE positions in the NR downlink resource distribution map. In addition, in this application embodiment, the strength of the LTE CRS interference signals configured in the RE is set to be the same and is not distinguished.

[0074] In an exemplary embodiment of this application, the height of the ZP CSI-RS detection window is not limited to 3 REs, and can also be determined based on multiple neighboring cell LTE CRS mode information. Specifically, when obtaining neighboring cell LTE CRS port information, neighboring cell LTE CRS mode information can also be obtained. This neighboring cell LTE CRS mode information includes LTE CRS mode information corresponding to multiple LTE cells. Furthermore, this neighboring cell LTE CRS mode information is the remainder of the PCI modulo 3 for each LTE cell. Then, a detection window generation rule can be determined based on the neighboring cell LTE CRS mode information. After constructing the NR downlink resource distribution map, the ZP CSI-RS detection window is determined based on this detection window generation rule.

[0075] Furthermore, when determining the detection window generation rule based on the neighboring cell LTE CRS mode information, it can be determined jointly based on the neighboring cell LTE CRS port information and the neighboring cell LTE CRS mode information. Specifically, (1) when the neighboring cell LTE CRS port information is two ports and the neighboring cell LTE CRS mode information is the same, the detection window generation rule can be set as follows: take any RE in the first target RE as the reference RE, take the reference RE as the starting RE, and generate a ZP CSI-RS detection window with a width of 1 RE and a height of 1 RE. That is, in this case, the size of the detection window is 1×1, with only 1 RE; (2) when the neighboring cell LTE CRS port information is two ports and the neighboring cell LTE CRS mode information is different, the detection window generation rule can be set as follows: take any RE in the first target RE as the reference RE, take the reference RE as the starting RE, and generate a ZP CSI-RS detection window with a width of 1 RE and a height of 3 RE. That is, the detection window contains 3 REs; (3) when the neighboring cell LTE CRS port information is four ports and the neighboring cell LTE CRS mode information is different, the detection window generation rule can be set as follows: take any RE in the first target RE as the reference RE, take the reference RE as the starting RE, and generate a ZP CSI-RS detection window with a width of 1 RE and a height of 3 RE. That is, the detection window contains 3 REs; When the CRS mode information is the same, the detection window generation rule can be set as follows: take the two time-domain adjacent REs in the second target RE as the reference RE, take the reference RE as the starting RE, and generate the ZP CSI-RS detection window with a width of 2 REs and a height of 1 RE. That is to say, in this case, the size of the detection window is 2×1, with only 2 REs; (4) When the LTE CRS port information of multiple neighboring cells is four ports, and the LTE CRS mode information of neighboring cells is not completely the same or completely different, the detection window generation rule can be set as follows: take the two time-domain adjacent REs in the second target RE as the reference RE, take the reference RE as the starting RE, and generate the ZP CSI-RS detection window with a width of 2 REs and a height of 3 REs. That is to say, the size of the detection window is 2×3, containing 6 REs.

[0076] By determining the detection window generation rule based on the LTE CRS mode information, and then determining the ZP CSI-RS detection window based on the detection window generation rule, accurate interference detection can be achieved, resource waste can be reduced, and detection efficiency can be improved.

[0077] In an exemplary embodiment of this application, after determining the ZP CSI-RS detection window, the information of the ZP CSI-RS detection window can be sent to the NR terminal. The NR terminal can then perform neighboring cell LTE CRS interference detection based on the ZP CSI-RS detection window. Neighboring cell LTE CRS interference detection can be achieved through event triggering and periodic triggering. Periodic triggering involves the DSS base station periodically triggering the NR terminal to perform interference detection. For example, after a preset interval, a command is issued to trigger the NR terminal to activate the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window for LTE CRS interference detection. Event triggering is achieved by the DSS base station based on specific events. For example, when the DSS base station detects that the distance between the NR terminal and the DSS base station is at a mid-to-far point or a far point, or when the DSS base station detects a decrease in the downlink rate of the NR terminal, etc., an interference detection command can be issued to the NR terminal, triggering the NR terminal to activate the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window for LTE CRS interference detection. After the NR terminal completes LTE CRS interference detection, it can send the LTE CRS detection results to the DSS base station. The DSS base station then determines the target rate matching (RM) method for interference cancellation based on the LTE CRS detection results. The LTE CRS detection results include the number of REs (External Receptors) containing LTE CRS interference signals within the ZP CSI-RS detection window. It is worth noting that the ZP CSI-RS detection window differs for different LTE CRS port information. Therefore, before performing interference detection, the NR terminal needs to determine the number of antenna ports in neighboring LTE cells and then perform interference detection according to the corresponding ZP CSI-RS detection window.

[0078] In step S230, the LTE CRS interference detection result sent by the NR terminal is received, the target rate matching (RM) mode is determined according to the LTE CRS interference detection result, and the neighboring cell LTE CRS interference signal is eliminated according to the target RM mode.

[0079] In an exemplary embodiment of this application, after receiving the LTE CRS interference detection result sent by the NR terminal, the target RM mode can be determined based on the LTE CRS interference detection result. In this embodiment, the target RM mode can be determined based on whether there is an LTE CRS interference signal in the ZP CSI-RM detection window. Specifically, when the LTE CRS interference detection result indicates that there is LTE CRS interference in the REs in the ZP CSI-RS signal detection window, the RB symbol-level RM mode is used as the target RM mode; when the LTE CRS interference detection result indicates that there is no LTE CRS interference in any REs in the ZP CSI-RS signal detection window, the RB symbol-level RM mode is turned off, and rate matching is not required.

[0080] While RB symbol-level interference cancellation (RM) can quickly remove CRS interference, it performs rate matching on all 12 subcarriers simultaneously. When some REs do not have LTE CRS interference, using RB symbol-level RM for interference cancellation leads to resource waste, reducing available NR PDSCH resources and impacting NR downlink speed. Therefore, improving interference cancellation accuracy can enhance NR downlink speed. In this embodiment, a target RM method can be determined based on the severity of LTE CRS interference, and interference cancellation can be performed using this target RM method.

[0081] The degree of LTE CRS interference can be determined based on the number of REs exhibiting interference within the ZP CSI-RM detection window and the total number of REs included in the ZPCSI-RS detection window. If all REs within the ZP CSI-RS detection window exhibit LTE CRS interference, the interference level is considered severe; conversely, if only some REs within the ZP CSI-RS detection window exhibit LTE CRS interference, the interference level is considered mild. Furthermore, when the interference level is severe, the RB symbol-level RM method can be used as the target RM method; when the interference level is mild, both the RE-level RM method and the target RM method can be used.

[0082] Figures 8A-8C This diagram illustrates an interface for interference cancellation based on the target RM method. When using a 1×3 ZP CSI-RS detection window corresponding to the two antenna ports for LTE CRS interference detection, as shown... Figure 8A As shown, if LTE CRS interference is detected on all three REs, it indicates a severe level of interference. Therefore, the NR PDSCH uses RB-symbol-level RM for rate matching on the RBs with OFDM symbols 4, 7, and 11, as follows: Figure 8B As shown, if LTE CRS interference is detected only on some REs, it indicates that the interference level is relatively low. Therefore, NR PDSCH uses RE-level RM for rate matching on the REs with OFDM symbols 4, 7, and 11 where interference exists. Figure 8C As shown, if no LTE CRS interference is detected, the NR PDSCH disables either RE-level RM mode or RB-level RM mode on OFDM symbols 4, 7, and 11. The black blocks in the figure exemplarily represent the rate matching modes.

[0083] Figures 9A-9C This diagram illustrates an interface for interference cancellation based on the target RM method. When using a 2×3 ZP CSI-RS detection window corresponding to the four antenna ports for LTE CRS interference detection, as shown... Figure 9AAs shown, if LTE CRS interference is detected on all 6 REs, it indicates a severe interference level. Therefore, the NR PDSCH uses RB symbol-level RM for rate matching on RBs with OFDM symbols 4, 7, 8, and 11. Figure 9B As shown, if LTE CRS interference is detected only on some REs, it indicates that the interference level is relatively low. Therefore, the NR PDSCH uses RE-level RM for rate matching on the REs with OFDM symbols 4, 7, 8, and 11 where interference exists. Figure 9C As shown, if no LTE CRS interference is detected, the NR PDSCH disables either RE-level RM mode or RB-level RM mode on OFDM symbols 4, 7, 8, and 11. The black blocks in the figure exemplarily represent the rate matching modes.

[0084] The communication control method in this application can be applied to any scenario involving dynamic spectrum sharing between 4G LTE and 5G NR via DSS technology. The interaction flow of communication control in the embodiments of this application will be described next.

[0085] Figure 10 This diagram illustrates the interactive flow of the communication control method, such as... Figure 10 As shown, in step S1001, the DSS base station is powered on and initialized; in step S1002, the LTE CRS port information of multiple neighboring cells adjacent to the NR terminal is obtained, and an NR downlink resource distribution map is constructed based on the LTE CRS port information of the neighboring cells; in step S1003, the ZP CSI-RS detection window is determined based on the LTE CRS port information and the NR downlink resource distribution map; in step S1004, the ZP CSI-RS detection window is sent to the NR terminal; in step S1005, the NR terminal is conditionally or periodically triggered to perform interference detection; in step S1006, the NR terminal responds to the trigger and starts the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window to perform LTE CRS interference detection and obtain the LTE CRS interference detection result; in step S1007, the LTE CRS interference detection result is sent to the DSS base station; in step S1008, the DSS base station determines the target RM mode based on the LTE CRS interference detection result and performs interference cancellation based on the target RM mode.

[0086] In the communication control method of this application embodiment, the DSS base station obtains the LTE CRS port information of the neighboring LTE cell, and constructs a new NR downlink resource distribution map based on the neighboring LTE CRS port information; then, it determines the zero-power channel state reference signal (ZP CSI-RS) detection window according to the LTE CRS port information and the NR downlink resource distribution map, and sends the ZP CSI-RS detection window to the NR terminal, triggering the NR terminal to perform neighboring LTE CRS interference detection according to the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window; finally, it receives the LTE CRS interference detection result sent by the NR terminal, determines the target rate matching (RM) mode according to the LTE CRS interference detection result, and eliminates the neighboring LTE CRS interference signal according to the target RM mode. The communication control method of this application can adaptively switch between RE-level RM mode and symbol-level RM mode according to the number of LTE CRS ports, the starting position of RE corresponding to LTE CRS interference, and the severity of LTE CRS interference, so as to accurately and quickly eliminate LTE CRS interference signals, ensure the full utilization of NR PDSCH RE resources, thereby improving NR downlink speed, enhancing user experience, improving DSS network performance and resource utilization, and reducing DSS equipment construction, operation and maintenance costs.

[0087] This application also provides a communication control device. Figure 11 A schematic diagram of the communication control device 1100 is shown. This communication control device is configured in a DSS base station, such as... Figure 11 As shown, the communication control device 1100 may include an interference signal map construction module 1101, a detection window determination module 1102, and an interference cancellation module 1103, specifically:

[0088] The interference signal map construction module 1101 is used to obtain LTE CRS port information of specific reference signals of neighboring LTE cells and construct a new air interface NR downlink resource distribution map based on the neighboring LTE CRS port information.

[0089] The detection window determination module 1102 is used to determine the zero-power channel state reference signal ZP CSI-RS detection window based on the LTE CRS port information and the NR downlink resource distribution map, send the ZP CSI-RS detection window to the NR terminal, and trigger the NR terminal to perform LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window.

[0090] The interference cancellation module 1103 is used to receive the LTE CRS interference detection result sent by the NR terminal, determine the target rate matching (RM) mode according to the LTE CRS interference detection result, and cancel the LTE CRS interference signal of the neighboring cell according to the target RM mode.

[0091] In an exemplary embodiment of this application, the interference signal map construction module 1101 is configured to: when the neighboring cell LTE CRS port information consists of two ports and LTE CRS interference signals exist, configure the LTE CRS interference signals in the first target RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol in the initial NR downlink resource distribution map to obtain the NR downlink resource distribution map; when the neighboring cell LTE CRS port information consists of four ports and LTE CRS interference signals exist, configure the LTE CRS interference signals in the second target RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol in the initial NR downlink resource distribution map to obtain the NR downlink resource distribution map; wherein, the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol are the same as some OFDM symbols corresponding to the NR PDSCH channel, and the second OFDM symbol and the fourth OFDM symbol are temporally adjacent; the positions of the first target RE and the second target RE are determined according to the LTE... The remainder of the neighboring cell physical cell identifier (PCI) modulo 3 is determined by the CRS interference signal.

[0092] In an exemplary embodiment of this application, the interference signal map construction module 1101 is configured to: when the remainder is m, use the RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol in the (m+1+3n)th subcarrier as the first target RE, where m = 0, 1, 2, and n is a non-negative integer; when the remainder is m, use the RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol in the (m+1+3n)th subcarrier as the second target RE, where m = 0, 1, 2, and n is a non-negative integer.

[0093] In an exemplary embodiment of this application, the detection window determination module 1102 is configured to: when the LTE CRS port information consists of two ports, take any one of the first target REs as a reference RE, take the position of the reference RE as the starting position, and set the ZP CSI-RS detection window with a width of 1 RE and a height of 3 REs; when the LTE CRS port information consists of four ports, take two adjacent REs of the second target REs as reference REs, take the position of the reference RE as the starting position, and set the ZP CSI-RS detection window with a width of 2 REs and a height of 3 REs.

[0094] In an exemplary embodiment of this application, the communication control device 1100 includes: a rule generation unit, configured to acquire neighboring cell LTE CRS mode information when acquiring the neighboring cell LTE CRS port information, and determine a detection window generation rule based on the neighboring cell LTE CRS mode information; and a window determination unit, configured to determine the ZP CSI-RS detection window based on the detection window generation rule after constructing the NR downlink resource distribution map; wherein the neighboring cell LTE CRS mode information includes LTE CRS mode information corresponding to multiple LTE cells, and the neighboring cell LTE CRS mode information is the remainder of PCI modulo 3 corresponding to each of the LTE cells.

[0095] In an exemplary embodiment of this application, the rule generation unit is configured as follows: when the LTE CRS mode information of each neighboring cell is different, and the LTE CRS port information of the neighboring cell has two ports, the detection window generation rule is: taking any RE used to configure the LTE CRS interference signal of the neighboring cell as a reference RE, taking the reference RE as the starting RE, and generating a ZP CSI-RS detection window with a width of 1 RE and a height of 3 REs; when the LTE CRS mode information of each neighboring cell is different, and the LTE CRS port information of the neighboring cell has four ports, the detection window generation rule is: taking any two time-domain adjacent REs used to configure the LTE CRS interference signal of the neighboring cell as reference REs, taking the reference RE as the starting RE, and generating a ZP CSI-RS signal detection window with a width of 2 REs and a height of 3 REs; when the LTE CRS mode information of each neighboring cell is the same, and the LTE CRS port information of the neighboring cell has two ports, the detection window generation rule is: taking any two time-domain adjacent REs used to configure the LTE CRS interference signal of the neighboring cell as reference REs, taking the reference RE as the starting RE, and generating a ZP CSI-RS signal detection window with a width of 2 REs and a height of 3 REs. Any RE of the CRS interference signal is used as the reference RE. The ZP CSI-RS signal detection window is generated with the reference RE as the starting RE and the width is 1 RE and the height is 1 RE. When the LTE CRS mode information of each neighboring cell is the same and the LTE CRS port information of the neighboring cell is four ports, the detection window generation rule is as follows: any two time-domain adjacent REs used to configure the LTE CRS interference signal are used as the reference RE. The ZPCSI-RS signal detection window is generated with the reference RE as the starting RE and the width is 2 RE and the height is 1 RE.

[0096] In an exemplary embodiment of this application, the interference cancellation module 1103 is configured to: when the LTE CRS interference detection result indicates that there is LTE CRS interference in the REs in the ZP CSI-RS signal detection window, use the RB symbol-level RM method as the target RM method; when the LTE CRS interference detection result indicates that there is no LTE CRS interference in any REs in the ZP CSI-RS signal detection window, disable the RB symbol-level RM method.

[0097] In an exemplary embodiment of this application, the interference cancellation module 1103 is configured to: when the LTE CRS interference detection result is that all REs in the ZP CSI-RS signal detection window have LTE CRS interference, use the RB symbol-level RM method as the target RM method; when the LTE CRS interference detection result is that some REs in the ZP CSI-RS signal detection window have LTE CRS interference, use the RE-level RM method as the target RM method.

[0098] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0099] Furthermore, although the steps of the method in this application are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0100] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, mobile terminal, or network device, etc.) to execute the methods according to the embodiments of this application.

[0101] Figure 12 A schematic block diagram of a computer system architecture for implementing an electronic device according to embodiments of the present application is shown. The electronic device may be a device disposed in an IMT interference canceller or other information processing system.

[0102] It should be noted that, Figure 12 The computer system 1200 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0103] like Figure 12As shown, the computer system 1200 includes a central processing unit (CPU) 1201, which can perform various appropriate actions and processes based on programs stored in read-only memory (ROM) 1202 or programs loaded from storage section 1208 into random access memory (RAM). The RAM 1203 also stores various programs and data required for system operation. The CPU 1201, ROM 1202, and RAM 1203 are interconnected via a bus 1204. An input / output interface 1205 (I / O interface) is also connected to the bus 1204.

[0104] In some embodiments, the following components are connected to the input / output interface 1205: an input section 1206 including a keyboard, mouse, etc.; an output section 1207 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 1208 including a hard disk, etc.; and a communication section 1209 including a network interface card such as a local area network card, modem, etc. The communication section 1209 performs communication processing via a network such as the Internet. A drive 1210 is also connected to the input / output interface 1205 as needed. A removable medium 1211, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on the drive 1210 as needed so that computer programs read from it can be installed into the storage section 1208 as needed.

[0105] Specifically, according to embodiments of this application, the processes described in the various method flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1209, and / or installed from removable medium 1211. When the computer program is executed by central processing unit 1201, it performs various functions defined in the system of this application.

[0106] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium, a computer-readable medium, or any combination of the above. A computer-readable medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0107] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0108] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0109] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause an electronic device to execute the method according to the embodiments of this application.

[0110] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A communication control method applied to a dynamic spectrum sharing (DSS) base station, characterized in that, include: Obtain LTE CRS port information of specific reference signals of neighboring LTE cells, and construct a new air interface NR downlink resource distribution map based on the neighboring LTE CRS port information; Based on the neighboring cell LTE CRS port information and the NR downlink resource distribution map, a zero-power channel state reference signal (ZP CSI-RS) detection window is determined, and the ZP CSI-RS detection window is sent to the NR terminal, triggering the NR terminal to perform neighboring cell LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window. The system receives the LTE CRS interference detection result sent by the NR terminal, determines the target rate matching (RM) mode based on the LTE CRS interference detection result, and eliminates the LTE CRS interference signal in the neighboring cell according to the target RM mode.

2. The method according to claim 1, characterized in that, The construction of the NR downlink resource distribution map based on the neighboring cell LTE CRS port information includes: When the neighboring cell LTE CRS port information consists of two ports and there is an LTE CRS interference signal, the LTE CRS interference signal is configured in the first target RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol in the initial NR downlink resource distribution map to obtain the NR downlink resource distribution map; When the neighboring cell LTE CRS port information has four ports and there is an LTE CRS interference signal, the LTE CRS interference signal is configured in the second target RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol and the fourth OFDM symbol in the initial NR downlink resource distribution map to obtain the NR downlink resource distribution map; The first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol are the same as some OFDM symbols corresponding to the NR PDSCH channel, and the second OFDM symbol and the fourth OFDM symbol are time-domain adjacent; the positions of the first target RE and the second target RE are determined based on the remainder after taking the modulo 3 of the neighboring cell physical cell identifier (PCI) corresponding to the LTE CRS interference signal.

3. The method according to claim 2, characterized in that, The configuration of the LTE CRS interference signal in the first target RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol in the initial NR downlink resource distribution map includes: When the remainder is m, the RE corresponding to the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol in the (m+1+3n)th subcarrier is taken as the first target RE, where m=0, 1, 2, and n is a non-negative integer; The configuration of the LTE CRS interference signal in the second target RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol in the initial NR downlink resource distribution map includes: When the remainder is m, the RE corresponding to the first OFDM symbol, the second OFDM symbol, the third OFDM symbol and the fourth OFDM symbol in the (m+1+3n)th subcarrier is taken as the second target RE, where m=0, 1, 2 and n is a non-negative integer.

4. The method according to claim 2, characterized in that, The step of determining the ZP CSI-RS detection window based on the neighboring cell LTE CRS port information and the NR downlink resource distribution map includes: When the LTE CRS port information is two ports, any one of the first target REs is taken as the reference RE, and the position of the reference RE is taken as the starting position. The ZP CSI-RS detection window is set with a width of 1 RE and a height of 3 REs. When the LTE CRS port information has four ports, two adjacent REs in the second target RE are taken as reference REs, and the position of the reference RE is taken as the starting position. The ZP CSI-RS detection window is set with a width of 2 REs and a height of 3 REs.

5. The method according to claim 1, characterized in that, The method further includes: When acquiring the neighboring cell LTE CRS port information, acquire the neighboring cell LTE CRS mode information, and determine the detection window generation rule based on the neighboring cell LTE CRS mode information; After constructing the NR downlink resource distribution map, the ZP CSI-RS detection window is determined based on the detection window generation rules; The neighboring cell LTE CRS mode information includes LTE CRS mode information corresponding to multiple LTE cells, and the neighboring cell LTE CRS mode information is the remainder of PCI modulo 3 corresponding to each of the LTE cells.

6. The method according to claim 5, characterized in that, The step of determining the detection window generation rule based on the LTE CRS mode information includes: When the LTE CRS mode information of each neighboring cell is different, and the LTE CRS port information of the neighboring cell is two ports, the detection window generation rule is as follows: take any RE used to configure the LTE CRS interference signal of the neighboring cell as the reference RE, take the reference RE as the starting RE, and generate a ZP CSI-RS detection window with a width of 1 RE and a height of 3 REs. When the LTE CRS mode information of each neighboring cell is different, and the LTE CRS port information of the neighboring cell is four ports, the detection window generation rule is as follows: any two time-domain adjacent REs used to configure the LTE CRS interference signal of the neighboring cell are taken as reference REs, and the ZP CSI-RS signal detection window is generated with the reference RE as the starting RE and the width is 2 REs and the height is 3 REs. When the LTE CRS mode information of each neighboring cell is the same, and the LTE CRS port information of the neighboring cell is two ports, the detection window generation rule is as follows: take any RE used to configure the LTE CRS interference signal of the neighboring cell as the reference RE, take the reference RE as the starting RE, and generate a ZP CSI-RS signal detection window with a width of 1 RE and a height of 1 RE. When the LTE CRS mode information of each neighboring cell is the same, and the LTE CRS port information of the neighboring cell is four ports, the detection window generation rule is as follows: any two time-domain adjacent REs used to configure the LTE CRS interference signal are taken as reference REs, and the ZP CSI-RS signal detection window is generated with the reference RE as the starting RE and the width is 2 REs and the height is 1 RE.

7. The communication control method according to any one of claims 4-6, characterized in that, The step of receiving the LTE CRS interference detection result sent by the NR terminal and determining the target RM mode based on the LTE CRS interference detection result includes: When the LTE CRS interference detection result indicates that there is LTE CRS interference in the RE in the ZP CSI-RS signal detection window, the RB symbol-level RM method will be used as the target RM method. When the LTE CRS interference detection result is that there is no LTE CRS interference in any RE in the ZP CSI-RS signal detection window, the RB symbol-level RM mode is turned off.

8. The communication control method according to claim 7, characterized in that, The method further includes: When the LTE CRS interference detection result is that all REs in the ZP CSI-RS signal detection window have LTE CRS interference, the RB symbol-level RM method is taken as the target RM method; When the LTE CRS interference detection result indicates that some REs in the ZP CSI-RS signal detection window have LTE CRS interference, the RE-level RM method is taken as the target RM method.

9. A communication control device, configured in a Dynamic Spectrum Sharing (DSS) base station, characterized in that, include: The interference signal map construction module is used to obtain LTE CRS port information of specific reference signals of neighboring LTE cells and construct a new air interface NR downlink resource distribution map based on the neighboring LTE CRS port information. The detection window determination module is used to determine the zero-power channel state reference signal ZP CSI-RS detection window based on the LTE CRS port information and the NR downlink resource distribution map, send the ZP CSI-RS detection window to the NR terminal, and trigger the NR terminal to perform LTE CRS interference detection based on the ZP CSI-RS signal corresponding to the ZP CSI-RS detection window; The interference cancellation module is used to receive the LTE CRS interference detection result sent by the NR terminal, determine the target rate matching (RM) mode based on the LTE CRS interference detection result, and cancel the LTE CRS interference signal of the neighboring cell according to the target RM mode.

10. A computer storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the communication control method according to any one of claims 1 to 8.

11. An electronic device, characterized in that, include: processor; as well as Memory for storing the executable instructions of the processor; The processor is configured to execute the communication control method according to any one of claims 1 to 8 by executing the executable instructions.

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