Methods, apparatus, network devices and storage media for suppressing cross-link interference

Abstract

This invention provides a method, apparatus, network device, and storage medium for suppressing cross-link interference. The method includes: a first network device receiving interference beam indication information sent by a second network device; determining, based on the interference beam indication information, a first beam direction that interferes with the uplink transmission of the second network device from the downlink transmission of the first network device; acquiring a target terminal device located along the first beam direction among the terminal devices within the first network device; and adjusting the scheduling time slot of the downlink service of the target terminal device. Therefore, embodiments of this invention suppress cross-link interference not limited by the number of transmitting and receiving beams of the interfering and affected stations, thus having a wider range of applications.

Description

Technical Field

[0001] This invention relates to the field of mobile communication technology, and in particular to a method, apparatus, network device, and storage medium for suppressing cross-link interference. Background Technology

[0002] 5G NR supports higher bandwidth configurations. Under the current Time Division Duplex (TDD) frame structure ratios (such as 8D2U or 7D3U), downlink transmission rates are higher, which can meet the download speeds of higher-traffic services. However, when users are engaged in live streaming, video calls, or in scenarios involving high-definition cameras and video surveillance backhaul for enterprise users (2Business, 2B), the aforementioned TDD frame structure can limit uplink capacity, affecting the user's upload experience. Increasing the frame structure time slot ratio (such as 1D3U) can meet the needs of high-traffic uplink scenarios. However, when different frame structures coexist on the same frequency in adjacent areas, it can introduce severe cross-link interference (CLI). Therefore, to support the coexistence of various 5G application scenarios, it is necessary to research and implement methods to reduce CLI interference.

[0003] The interference characteristics of CLI (Cybernetic Interference) are mainly manifested in the downlink of one base station (called the interfering station) interfering with the uplink of neighboring base stations (called the interfered stations). Especially with 5G employing Massive MIMO technology, the shaped beam is narrower and covers a longer distance, resulting in stronger interference in CLI scenarios. Therefore, interference suppression largely needs to be achieved by reducing the interference from the interfering station. For example, Figure 1 This is a schematic diagram of the frame structure under CLI interference scenarios. The jamming station is configured with a 7D3U frame structure, and the jammed station is configured with a 1D3U frame structure. CLI interference mainly manifests as the jamming station's D / S time slot interfering with the jammed station's U time slot. Here, D represents the downlink time slot, S represents the flexible time slot, and U represents the uplink time slot.

[0004] Currently, beam coordination interference suppression methods in CLI scenarios involve the following steps: the affected station sends a coordination request message indicating the desired uplink receive beam setting; upon receiving the request message, the interfering station selects its downlink transmit beam to reduce interference to the affected station's uplink receive beam. Alternatively, the interfering station transmits its beam normally and transmits beam information, allowing the affected station to adjust its receive beam according to the level of interference. In summary, existing beam coordination schemes primarily reduce interference through interaction between the interfering and affected stations and by adjusting beam direction.

[0005] As mentioned above, current beam coordination schemes primarily reduce CLI interference by interacting and adjusting the beam direction between the scrambling and scrambled stations. However, this scheme has limitations. For example, when the scrambled station receives a wide beam, it cannot adjust the receiving beam direction. Conversely, when the scrambling station adjusts its beam direction, a large adjustment will affect user coverage in that beam direction, while a small adjustment will negatively impact interference suppression.

[0006] Therefore, the effectiveness of existing technologies in suppressing cross-link interference is limited by the number of transmit and receive beams of both the interfered and interfering stations. Summary of the Invention

[0007] This invention provides a method, apparatus, network device, and storage medium for suppressing cross-link interference, thereby addressing the problem in the prior art where the effectiveness of suppressing cross-link interference is limited by the number of transmitted and received beams from the interfered station and the interfering station.

[0008] In a first aspect, embodiments of the present invention provide a method for suppressing cross-link interference, applied to a first network device, the method comprising:

[0009] Receive interference beam indication information sent by the second network device;

[0010] Based on the interference beam indication information, the direction of the first beam that interferes with the uplink transmission of the second network device is determined;

[0011] Acquire the target terminal device located in the direction of the first beam among the terminal devices within the first network device;

[0012] Adjust the scheduling time slots for downlink services of the target terminal device.

[0013] Optionally, obtaining the target terminal device located in the first beam direction among the terminal devices within the first network device includes:

[0014] Obtain the first terminal device in the cell access process among the terminal devices within the first network device;

[0015] Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access;

[0016] The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

[0017] Optionally, the step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device further includes:

[0018] Obtain the second terminal device that is in a connected state among the terminal devices within the first network device;

[0019] Determine the direction of the second beam indicated by the first indication information reported by the second terminal device, wherein the first indication information is used to indicate the beam with the strongest channel state information reference signal;

[0020] The terminal device in the second terminal device whose second beam direction is the same as the first beam direction is selected as the target terminal device.

[0021] Optionally, adjusting the downlink service scheduling time slots of the target terminal device includes:

[0022] Schedule downlink services of the target terminal device in non-cross-time slots;

[0023] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0024] Optionally, after obtaining the target terminal device located in the first beam direction among the terminal devices within the first network device, the method further includes:

[0025] Adjust the scheduling time slot of the control channel of the target terminal device.

[0026] Optionally, adjusting the scheduling time slot of the control channel of the target terminal device includes:

[0027] The control channel of the target terminal device is scheduled in a non-crossing time slot;

[0028] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0029] Optionally, adjusting the scheduling time slot of the control channel of the target terminal device includes:

[0030] Adjust the scheduling time slot of the physical downlink control channel for uplink authorization sent by the target terminal device.

[0031] Secondly, embodiments of the present invention also provide a method for suppressing cross-link interference, applied to a second network device, the method comprising:

[0032] Obtain interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0033] The interference beam indication information is sent to the first network device.

[0034] Optionally, obtaining the interference beam indication information includes:

[0035] Measure the uplink receive interference power of the beam pre-configured for the first network device;

[0036] The identification information of the beam direction with the highest uplink received interference power is determined as the interference beam indication information.

[0037] Thirdly, embodiments of the present invention also provide a network device, wherein the network device is a first network device;

[0038] The network device includes a memory, a transceiver, and a processor.

[0039] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0040] Control the transceiver to receive interference beam indication information sent by the second network device;

[0041] Based on the interference beam indication information, the direction of the first beam that interferes with the uplink transmission of the second network device is determined;

[0042] Acquire the target terminal device located in the direction of the first beam among the terminal devices within the first network device;

[0043] Adjust the scheduling time slots for downlink services of the target terminal device.

[0044] Fourthly, embodiments of the present invention provide a network device, wherein the network device is a second network device;

[0045] The network device includes a memory, a transceiver, and a processor.

[0046] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0047] Obtain interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0048] The transceiver is controlled to send the interference beam indication information to the first network device.

[0049] Fifthly, embodiments of the present invention provide an apparatus for suppressing cross-link interference, applied to a first network device, the apparatus comprising:

[0050] The first receiving module is used to receive interference beam indication information sent by the second network device;

[0051] The interference direction determination module is used to determine, based on the interference beam indication information, the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0052] The device acquisition module is used to acquire the target terminal device located in the direction of the first beam among the terminal devices in the first network device;

[0053] The first adjustment module is used to adjust the scheduling time slots of the downlink services of the target terminal device.

[0054] Sixthly, embodiments of the present invention provide an apparatus for suppressing cross-link interference, applied to a second network device, the apparatus comprising:

[0055] An indication information acquisition module is used to acquire interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0056] The first transmitting module is used to transmit the interference beam indication information to the first network device.

[0057] In a seventh aspect, embodiments of the present invention also provide a processor-readable storage medium storing a computer program for causing the processor to execute the method for suppressing cross-link interference as described in any of the preceding claims.

[0058] In this embodiment of the invention, the first network device receives interference beam indication information sent by the second network device, and then determines the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device based on the interference beam indication information. In turn, it obtains the target terminal device located in the first beam direction among the terminal devices in the first network device, and adjusts the scheduling time slot of the downlink service of the target terminal device.

[0059] In this embodiment, the first network device is the scrambling station, and the second network device is the scrambling station. Thus, in this embodiment, the interference of the first network device on the second network device in the first beam direction is suppressed by adjusting the downlink service scheduling time slot of the terminal device located in the first beam direction within the scrambling station, without changing the beam direction of the scrambling and scrambling stations. Therefore, in this embodiment, the suppression of cross-link interference is not limited by the number of transmitting and receiving beams of the scrambling and scrambling stations, and has a wider range of applications. Attached Figure Description

[0060] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of cross-link interference with different frame structures in existing TDD technology;

[0062] Figure 2 A flowchart of a method for suppressing cross-link interference applied to a first network device according to an embodiment of the present invention;

[0063] Figure 3 This is a schematic diagram of the direction of the interference beam in an embodiment of the present invention;

[0064] Figure 4 This is a schematic diagram of UL Grant scheduling adjustment in an embodiment of the present invention;

[0065] Figure 5 A flowchart of a method for suppressing cross-link interference applied to a second network device, provided in an embodiment of the present invention;

[0066] Figure 6 A structural block diagram of a device for suppressing cross-link interference applied to a first network device provided in an embodiment of the present invention;

[0067] Figure 7 This is a structural block diagram of a device for suppressing cross-link interference applied to a second network device, provided in an embodiment of the present invention.

[0068] Figure 8 This is a structural block diagram of a network device provided in an embodiment of the present invention. Detailed Implementation

[0069] In this embodiment of the invention, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0070] In the embodiments of this application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0071] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0072] This application provides a method, apparatus, network device, and storage medium for suppressing cross-link interference, thereby addressing the problem in the prior art where the effectiveness of suppressing cross-link interference is limited by the number of transmitted and received beams from the interfered station and the interfering station.

[0073] The method and apparatus are based on the same concept of the application. Since the methods and apparatus solve problems in similar ways, the implementation of the apparatus and methods can refer to each other, and the repeated parts will not be described again.

[0074] Furthermore, the technical solutions provided in this application can be applied to various systems, especially 5G systems. For example, applicable systems may include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), and 5G New Radio (NR). All of these systems include terminal equipment and network equipment. The systems may also include a core network component, such as Evolved Packet System (EPS) and 5G system (5GS).

[0075] The terminal devices involved in the embodiments of this application can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in a 5G system, a terminal device can be called User Equipment (UE). Wireless terminal devices can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, for example, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but is not limited to these terms in the embodiments of this application.

[0076] The network device involved in this application embodiment can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with a wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in the embodiments of this application can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a NodeB in a Wide-band Code Division Multiple Access (WCDMA) system, an evolved Node B (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a next generation system, a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of this application. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may be geographically separated.

[0077] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, precoding transmission, or beamforming transmission, etc.

[0078] Figure 2 A flowchart illustrating a method for suppressing cross-link interference according to an embodiment of the present invention is shown. The method is applied to a first network device, wherein the first network device is the interfering station, and the second network device described below is the interfered station.

[0079] like Figure 2 As shown, the method may include the following steps S201 to S204.

[0080] Step S201: Receive interference beam indication information sent by the second network device.

[0081] The first network device (i.e., the harassing station) can send a Remote Interference Management Reference Signal (RIM-RS) to the second network device (i.e., the harassed station). The RIM-RS carries the cell identifier and beam information of the first network device. The second network device can measure the uplink received interference power of the received RIM-RS and send the identification information of the beam direction with the largest uplink received interference power as interference indication information to the first network device.

[0082] Therefore, the interference beam indication information is used to indicate the direction of the beam that causes the strongest interference from the interfering station to the interfered station.

[0083] Step S202: Based on the interference beam indication information, determine the first beam direction that interferes with the uplink transmission of the second network device from the downlink transmission of the first network device.

[0084] When different frame structures coexist at the same frequency in adjacent intervals, it can introduce severe CLI. Therefore, the first network device and the second network device mentioned above have the same frequency in the first beam direction.

[0085] In addition, since the interference beam indication information is used to indicate the beam direction in which the interfering station interferes most strongly with the interfering station, the first beam direction is the beam direction in which the first network device interferes most strongly with the second network device, that is, the first beam direction is the strongest interference beam direction.

[0086] Step S203: Obtain the target terminal device located in the direction of the first beam among the terminal devices within the first network device.

[0087] In this embodiment, the downlink transmission of the first network device in the first beam direction will interfere with the uplink transmission of the second network device. Therefore, in order to suppress this interference, the embodiments of the present invention need to obtain the target terminal device in the first network device in the first beam direction, so as to adjust the scheduling time slot of the downlink service of the terminal device.

[0088] Step S204: Adjust the scheduling time slots of downlink services of the target terminal device.

[0089] In an embodiment of the present invention, the scheduling time slot of the downlink service of the target terminal device is adjusted so that the downlink service of the target terminal device is staggered from the uplink transmission time slot of the second network device, thereby avoiding the downlink transmission of the first network device in the first beam direction from affecting the uplink transmission of the second network device.

[0090] As can be seen from the above steps S201 to S204, in this embodiment of the invention, the first network device receives interference beam indication information sent by the second network device, and then determines the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device according to the interference beam indication information, and then obtains the target terminal device located in the first beam direction among the terminal devices in the first network device, and adjusts the scheduling time slot of the downlink service of the target terminal device.

[0091] In this embodiment, the first network device is the scrambling station, and the second network device is the scrambling station. Thus, in this embodiment, the interference of the first network device on the second network device in the first beam direction is suppressed by adjusting the downlink service scheduling time slot of the terminal device located in the first beam direction within the scrambling station, without changing the beam direction of the scrambling and scrambling stations. Therefore, in this embodiment, the suppression of cross-link interference is not limited by the number of transmitting and receiving beams of the scrambling and scrambling stations, and has a wider range of applications.

[0092] Optionally, obtaining the target terminal device located in the first beam direction among the terminal devices within the first network device includes:

[0093] Obtain the first terminal device in the cell access process among the terminal devices within the first network device;

[0094] Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access;

[0095] The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

[0096] The network device sends multiple narrow beam direction synchronization signal blocks (SSBs) and configures different access preamble index ranges for different SSBs. Therefore, when a terminal device accesses the network device, it first measures the signal strength of each SSB, and then selects the preamble corresponding to the SSB with the strongest signal for random access. Once the network device detects the preamble, it can determine the beam direction of the SSB where the terminal device is located based on the preamble index.

[0097] Therefore, in the embodiments of the present invention, for a first terminal device in the access process within a first network device, the first network device can determine the target SSB that has a mapping relationship with the preamble used by the first terminal device for random access, based on the mapping relationship between the preamble and the SSB. The target SSB that has a mapping relationship with the preamble used by the first terminal device for random access is the SSB where the first terminal device is located.

[0098] Furthermore, after determining the SSB where the first terminal device in the access process within the first network device is located, it is possible to compare whether the beam direction of that SSB is the same as the aforementioned first beam direction (i.e., the direction of the strongest interference beam). If they are the same, it is determined that the first terminal device in that SSB is located in the direction of the strongest interference beam. For example Figure 3 As shown, UE1 and UE2 are both first terminal devices in the access process within the first network device. If the beam direction of the SSB where UE1 is located is the same as the direction of the strongest interference beam, then UE1 is located in the direction of the strongest interference beam; if the beam direction of the SSB where UE2 is located is not the same as the direction of the strongest interference beam, then UE2 is not located in the direction of the strongest interference beam.

[0099] Optionally, the step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device further includes:

[0100] Obtain the second terminal device that is in a connected state among the terminal devices within the first network device;

[0101] Determine the direction of the second beam indicated by the first indication information reported by the second terminal device, wherein the first indication information is used to indicate the beam with the strongest channel state information reference signal;

[0102] The terminal device in the second terminal device whose second beam direction is the same as the first beam direction is selected as the target terminal device.

[0103] When a terminal device is connected within a cell, its beam direction may change due to its mobility. Therefore, network devices need to track the terminal device's beam position in real time. The Channel State Information Reference Signal (CSI-RS) introduced by NR can not only be used for channel measurement but also present multiple beam direction information, i.e., it transmits narrow beams in multiple directions through beamforming. Therefore, when network devices transmit CSI-RS signals in multiple beam directions and configure terminal devices to report beam information measurements, the terminal devices report beam information measurements according to the configured time granularity. The reported information includes the strongest beam indication of the CSI-RS signal. Network devices can then determine the reported beam indication. If a terminal device's beam indication matches the aforementioned first beam direction (i.e., the strongest interfering beam direction), then the terminal device is located in the direction of the strongest interfering beam.

[0104] As can be seen from the above, in the embodiments of the present invention, for a terminal device in the first network device, if it is in the cell access process, it is determined whether it is in the direction of the strongest interference beam based on the beam direction of the SSB that has a mapping relationship with the preamble used for random access; if it is in the connection state, it is determined whether it is in the direction of the strongest interference beam based on the strongest beam direction of the CSI-RS reported to the first network device.

[0105] Optionally, adjusting the downlink service scheduling time slots of the target terminal device includes:

[0106] Schedule downlink services of the target terminal device in non-cross-time slots;

[0107] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0108] In addition, the cross-slot is the cross-slot between the downlink slot and flexible slot of the first network device and the uplink slot of the second network device.

[0109] Therefore, in the embodiments of the present invention, for a target terminal device within the first network device located in the direction of the strongest interference beam, downlink services of the target terminal device are scheduled in non-crossing time slots, and no scheduling is performed in crossing time slots, thereby avoiding impact on the second network device in the direction of the strongest interference beam. For terminal devices within the first network device not located in the direction of the strongest interference beam, all time slots can be scheduled. For example... Figure 3 As shown, UE1 is located in the direction of the strongest interference beam, and it schedules downlink services in non-crossing time slots; UE2 is not located in the direction of the strongest interference beam, and it can be scheduled normally in all time slots, that is, UE2's services are not affected.

[0110] Specifically, for example Figure 1 As shown, the downlink time slot D and flexible time slot S of the interfering station overlap with the uplink time slot U of the interfering station. Therefore, in Figure 1 In this context, time slots 2, 3, and 7 are cross-interleaved time slots, while other time slots (0, 1, 4, 5, 6, 8, and 9) are non-cross-interleaved time slots. Therefore, for terminal equipment located in the direction of the strongest interfering beam within the interfering station, downlink services can be scheduled in time slots 0, 1, 4, 5, 6, 8, and 9, but not in time slots 2, 3, and 7.

[0111] Optionally, after obtaining the target terminal device located in the first beam direction among the terminal devices within the first network device, the method further includes:

[0112] Adjust the scheduling time slot of the control channel of the target terminal device.

[0113] In an embodiment of the present invention, the scheduling time slot of the control channel of the target terminal device is adjusted so that the scheduling time slot of the control channel of the target terminal device is staggered from the uplink transmission time slot of the second network device, thereby further reducing interference to the uplink transmission of the second network device.

[0114] Optionally, adjusting the scheduling time slot of the control channel of the target terminal device includes:

[0115] The control channel of the target terminal device is scheduled in a non-crossing time slot;

[0116] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0117] Therefore, in the embodiments of the present invention, for a target terminal device within the first network device located in the direction of the strongest interference beam, the control channel of the target terminal device is scheduled in non-crossing time slots, and not scheduled in crossing time slots, thereby avoiding any impact on the second network device in the direction of the strongest interference beam. For terminal devices within the first network device not located in the direction of the strongest interference beam, the control channel can be scheduled in all time slots.

[0118] Optionally, adjusting the scheduling time slot of the control channel of the target terminal device includes:

[0119] Adjust the scheduling time slot of the physical downlink control channel for uplink authorization sent by the target terminal device.

[0120] In embodiments of the present invention, the control channel refers to the physical downlink control channel (PDCCH) that transmits downlink grants (DL Grants) and uplink grants (UL Grants). Where the scrambling station does not schedule downlink services, it will not transmit the DL grant PDCCH. However, for UL Grant messages that schedule uplink services, they will still be transmitted on the PDCCH channel, generating CLI interference. In this case, by adjusting the uplink scheduling timing, CLI interference can be avoided in the direction of the strongest interference beam.

[0121] The scrambling station can adjust the scheduling timing to move the PDCCH scheduled for the UL grant to a non-cross-slot for transmission. For example... Figure 4 As shown, time slots 2, 3, and 7 are cross-time slots. Taking the 7D3U frame structure of the scrambling station as an example, the UL grant of time slot 4 is adjusted to be sent to time slot 1, and the UL grants of time slots 8 and 9 are adjusted to be sent to time slots 5 and 6 respectively, in order to avoid scheduling the PDCCH channel used to send UL grants in the cross-time slots.

[0122] As can be seen from the above, in the embodiments of the present invention, the scrambling station can suppress CLI interference caused by user scheduling in the direction of the strongest interference beam to a greater extent by scheduling and avoiding traffic channels and control channels.

[0123] In summary, the embodiments of the present invention, based on the interference beam indication information fed back by the disturbed station, allow the disturbing station to determine the direction of the strongest interference beam, thereby determining whether the terminal equipment within the disturbing station is located in the direction of the strongest interference beam. Specifically, for terminal equipment located in the direction of the strongest interference beam, not only is the transmission time of the downlink service beam adjusted, but the timing position of the control channel is also adjusted. This effectively reduces user beam interference on the cross-time slots without affecting terminal equipment in directions other than the strongest interference beam of the disturbing station. Therefore, compared to existing beam coordination technologies, the embodiments of the present invention are not limited by the number of transmitting and receiving beams of the disturbing and disturbed stations, offering greater flexibility and a wider range of applications in CLI scenarios.

[0124] Figure 5 The diagram illustrates a flowchart of a method for suppressing cross-link interference according to an embodiment of the present invention. The method is applied to a second network device, wherein the second network device is the affected station, and the first network device is the interfering station.

[0125] like Figure 5 As shown, the method may include the following steps S501 to S502.

[0126] Step S501: Obtain interference beam indication information.

[0127] The interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device.

[0128] Step S502: Send the interference beam indication information to the first network device.

[0129] In an implementation of the present invention, the second network device sends interference beam indication information to the first network device, so that the first network device can determine the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device based on the interference beam indication information, thereby obtaining the target terminal device located in the first beam direction among the terminal devices in the first network device, and adjusting the scheduling time slot of the downlink service of the target terminal device.

[0130] In this embodiment, the first network device is the scrambling station, and the second network device is the scrambling station. Thus, in this embodiment, the interference of the first network device on the second network device in the first beam direction is suppressed by adjusting the downlink service scheduling time slot of the terminal device located in the first beam direction within the scrambling station, without changing the beam direction of the scrambling and scrambling stations. Therefore, in this embodiment, the suppression of cross-link interference is not limited by the number of transmitting and receiving beams of the scrambling and scrambling stations, and has a wider range of applications.

[0131] Optionally, obtaining the interference beam indication information includes:

[0132] Measure the uplink receive interference power of the beam pre-configured for the first network device;

[0133] The identification information of the beam direction with the highest uplink received interference power is determined as the interference beam indication information.

[0134] In an embodiment of the present invention, a first network device (i.e., a scrambling station) may send a remote interference management reference signal (RIM-RS) to a second network device (i.e., a scrambling station). The RIM-RS carries the cell identifier and beam information of the first network device. The second network device may measure the uplink received interference power of the received RIM-RS and send the identification information of the beam direction with the largest uplink received interference power as interference indication information to the first network device.

[0135] The above describes the method for suppressing cross-link interference provided by the embodiments of the present invention. The following will describe the apparatus for suppressing cross-link interference provided by the embodiments of the present invention in conjunction with the accompanying drawings.

[0136] See Figure 6 This invention also provides a device for suppressing cross-link interference, applied to a first network device, such as... Figure 6As shown, the device includes:

[0137] The first receiving module 601 is used to receive interference beam indication information sent by the second network device;

[0138] The interference direction determination module 602 is used to determine, based on the interference beam indication information, the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0139] The device acquisition module 603 is used to acquire the target terminal device located in the direction of the first beam among the terminal devices in the first network device.

[0140] The first adjustment module 604 is used to adjust the scheduling time slots of the downlink services of the target terminal device.

[0141] Optionally, the device acquisition module 603 includes:

[0142] The first acquisition submodule is used to acquire the first terminal device in the cell access process among the terminal devices in the first network device;

[0143] The first determining submodule is used to determine the target synchronization signal block that has a mapping relationship with the target preamble based on the pre-determined mapping relationship between the preamble and the synchronization signal block, wherein the target preamble is the preamble used by the first terminal device for random access.

[0144] The second acquisition submodule is used to acquire the terminal device in the first terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction, and use it as the target terminal device.

[0145] Optionally, the device acquisition module 603 further includes:

[0146] The third acquisition submodule is used to acquire the second terminal device that is in a connected state among the terminal devices in the first network device;

[0147] The second determining submodule is used to determine the second beam direction indicated by the first indication information reported by the second terminal device, wherein the first indication information is used to indicate the beam with the strongest channel state information reference signal;

[0148] The fourth acquisition submodule is used to acquire the terminal device in the second terminal device whose second beam direction is the same as the first beam direction, as the target terminal device.

[0149] Optionally, the first adjustment module 604 is specifically used for:

[0150] Schedule downlink services of the target terminal device in non-cross-time slots;

[0151] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0152] Optionally, the device further includes:

[0153] The second adjustment module is used to adjust the scheduling time slot of the control channel of the target terminal device.

[0154] Optionally, the second adjustment module is specifically used for:

[0155] The control channel of the target terminal device is scheduled in a non-crossing time slot;

[0156] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0157] Optionally, the second adjustment module is specifically used for:

[0158] Adjust the scheduling time slot of the physical downlink control channel for uplink authorization sent by the target terminal device.

[0159] As can be seen from the above, in this embodiment of the invention, the first network device receives interference beam indication information sent by the second network device, and then determines the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device based on the interference beam indication information, thereby obtaining the target terminal device located in the first beam direction among the terminal devices in the first network device, and adjusting the scheduling time slot of the downlink service of the target terminal device.

[0160] In this embodiment, the first network device is the scrambling station, and the second network device is the scrambling station. Thus, in this embodiment, the interference of the first network device on the second network device in the first beam direction is suppressed by adjusting the downlink service scheduling time slot of the terminal device located in the first beam direction within the scrambling station, without changing the beam direction of the scrambling and scrambling stations. Therefore, in this embodiment, the suppression of cross-link interference is not limited by the number of transmitting and receiving beams of the scrambling and scrambling stations, and has a wider range of applications.

[0161] See Figure 7 This invention also provides a device for suppressing cross-link interference, applied to a second network device, such as... Figure 7 As shown, the device includes:

[0162] The indication information acquisition module 701 is used to acquire interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0163] The first transmitting module 702 is used to transmit the interference beam indication information to the first network device.

[0164] Optionally, the indication information acquisition module 701 is specifically used for:

[0165] Measure the uplink receive interference power of the beam pre-configured for the first network device;

[0166] The identification information of the beam direction with the highest uplink received interference power is determined as the interference beam indication information.

[0167] As can be seen from the above, in the implementation of the present invention, the second network device sends interference beam indication information to the first network device, so that the first network device can determine the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device according to the interference beam indication information, thereby obtaining the target terminal device located in the first beam direction among the terminal devices in the first network device, and adjusting the scheduling time slot of the downlink service of the target terminal device.

[0168] In this embodiment, the first network device is the scrambling station, and the second network device is the scrambling station. Thus, in this embodiment, the interference of the first network device on the second network device in the first beam direction is suppressed by adjusting the downlink service scheduling time slot of the terminal device located in the first beam direction within the scrambling station, without changing the beam direction of the scrambling and scrambling stations. Therefore, in this embodiment, the suppression of cross-link interference is not limited by the number of transmitting and receiving beams of the scrambling and scrambling stations, and has a wider range of applications.

[0169] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0170] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0171] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0172] Embodiments of the present invention also provide a network device, such as... Figure 8 As shown, the network device includes a memory 820, a transceiver 810, and a processor 800;

[0173] Memory 820 is used to store computer programs;

[0174] Transceiver 810 is used to receive and send data under the control of processor 800;

[0175] In a first aspect, when the network device is a first network device, the processor 800 is configured to read the computer program in the memory 820 and perform the following operations:

[0176] The transceiver 810 is controlled to receive interference beam indication information sent by the second network device;

[0177] Based on the interference beam indication information, the direction of the first beam that interferes with the uplink transmission of the second network device is determined;

[0178] Acquire the target terminal device located in the direction of the first beam among the terminal devices within the first network device;

[0179] Adjust the scheduling time slots for downlink services of the target terminal device.

[0180] Optionally, when the processor 800 acquires a target terminal device located in the first beam direction among the terminal devices within the first network device, it specifically performs the following:

[0181] Obtain the first terminal device in the cell access process among the terminal devices within the first network device;

[0182] Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access;

[0183] The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

[0184] Optionally, when the processor 800 acquires the target terminal device located in the first beam direction among the terminal devices within the first network device, it is further configured to:

[0185] Obtain the second terminal device that is in a connected state among the terminal devices within the first network device;

[0186] Determine the direction of the second beam indicated by the first indication information reported by the second terminal device, wherein the first indication information is used to indicate the beam with the strongest channel state information reference signal;

[0187] The terminal device in the second terminal device whose second beam direction is the same as the first beam direction is selected as the target terminal device.

[0188] Optionally, when adjusting the downlink service scheduling time slots of the target terminal device, the processor 800 is specifically used for:

[0189] Schedule downlink services of the target terminal device in non-cross-time slots;

[0190] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0191] Optionally, the processor 800 is further configured to:

[0192] Adjust the scheduling time slot of the control channel of the target terminal device.

[0193] Optionally, when adjusting the scheduling time slot of the control channel of the target terminal device, the processor 800 is specifically used for:

[0194] The control channel of the target terminal device is scheduled in a non-crossing time slot;

[0195] The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

[0196] Optionally, when adjusting the scheduling time slot of the control channel of the target terminal device, the processor 800 is specifically used for:

[0197] Adjust the scheduling time slot of the physical downlink control channel for uplink authorization sent by the target terminal device.

[0198] Secondly, when the network device is a second network device, the processor 800 is used to read the computer program in the memory 820 and perform the following operations:

[0199] Obtain interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device;

[0200] The transceiver 810 is controlled to send the interference beam indication information to the first network device.

[0201] Optionally, when acquiring interference beam indication information, the processor 800 is specifically used for:

[0202] Measure the uplink receive interference power of the beam pre-configured for the first network device;

[0203] The identification information of the beam direction with the highest uplink received interference power is determined as the interference beam indication information.

[0204] Among them, Figure 8 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 800) and memory (memory 820). The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 810 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 during operation.

[0205] The processor 800 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor 800 can also adopt a multi-core architecture.

[0206] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0207] Embodiments of the present invention also provide a processor-readable storage medium storing a computer program for causing the processor to execute a method for suppressing cross-link interference.

[0208] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical memory (e.g., CD, DVD, BD, HVD), and semiconductor memory (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).

[0209] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0210] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0211] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means, which are implemented in a process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0212] These processors can execute instructions that can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0213] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for suppressing cross-link interference, characterized in that, Applied to a first network device, the method includes: Receive interference beam indication information sent by the second network device; Based on the interference beam indication information, a first beam direction is determined to interfere with the uplink transmission of the second network device from the downlink transmission of the first network device. The first beam direction is the beam direction in which the interference from the first network device to the second network device is strongest. Acquire the target terminal device located in the direction of the first beam among the terminal devices within the first network device; Adjust the scheduling time slots for downlink services of the target terminal device; The step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device includes: Obtain the first terminal device in the cell access process among the terminal devices within the first network device; Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access; The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

2. The method for suppressing cross-link interference according to claim 1, characterized in that, The step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device further includes: Obtain the second terminal device that is in a connected state among the terminal devices within the first network device; Determine the direction of the second beam indicated by the first indication information reported by the second terminal device, wherein the first indication information is used to indicate the beam with the strongest channel state information reference signal; The terminal device in the second terminal device whose second beam direction is the same as the first beam direction is selected as the target terminal device.

3. The method for suppressing cross-link interference according to claim 1, characterized in that, The adjustment of the downlink service scheduling time slots of the target terminal device includes: Schedule downlink services of the target terminal device in non-cross-time slots; The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

4. The method for suppressing cross-link interference according to claim 1, characterized in that, After obtaining the target terminal device located in the first beam direction among the terminal devices within the first network device, the method further includes: Adjust the scheduling time slot of the control channel of the target terminal device.

5. The method for suppressing cross-link interference according to claim 4, characterized in that, The adjustment of the scheduling time slot of the control channel of the target terminal device includes: The control channel of the target terminal device is scheduled in a non-crossing time slot; The non-intersecting time slots refer to the downlink time slots and flexible time slots of the first network device, and the uplink time slots of the second network device, which do not intersect.

6. The method for suppressing cross-link interference according to claim 4, characterized in that, The adjustment of the scheduling time slot of the control channel of the target terminal device includes: Adjust the scheduling time slot of the physical downlink control channel for uplink authorization sent by the target terminal device.

7. A method for suppressing cross-link interference, characterized in that, Applied to a second network device, the method includes: Obtain interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device; Send the interference beam indication information to the first network device; Wherein, after the first network device receives the interference beam indication information sent by the second network device, the first network device determines the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device according to the interference beam indication information. The first beam direction is the beam direction in which the first network device interferes most strongly with the second network device. The first network device acquires the target terminal device located in the direction of the first beam from among the terminal devices within the first network device; The first network device adjusts the scheduling time slots of the downlink services of the target terminal device; The step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device includes: Obtain the first terminal device in the cell access process among the terminal devices within the first network device; Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access; The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

8. The method for suppressing cross-link interference according to claim 7, characterized in that, The acquisition of interference beam indication information includes: Measure the uplink receive interference power of the beam pre-configured for the first network device; The identification information of the beam direction with the highest uplink received interference power is determined as the interference beam indication information.

9. A network device, characterized in that, The network device is the first network device; The network device includes a memory, a transceiver, and a processor. A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Control the transceiver to receive interference beam indication information sent by the second network device; Based on the interference beam indication information, a first beam direction is determined to interfere with the uplink transmission of the second network device from the downlink transmission of the first network device. The first beam direction is the beam direction in which the interference from the first network device to the second network device is strongest. Acquire the target terminal device located in the direction of the first beam among the terminal devices within the first network device; Adjust the scheduling time slots for downlink services of the target terminal device; The step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device includes: Obtain the first terminal device in the cell access process among the terminal devices within the first network device; Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access; The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

10. A network device, characterized in that, The network device is a second network device; The network device includes a memory, a transceiver, and a processor. The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor. Processor, configured to read the computer program in the memory and perform the following operations: Obtain interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device; The transceiver is controlled to send the interference beam indication information to the first network device; Wherein, after the first network device receives the interference beam indication information sent by the second network device, the first network device determines the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device according to the interference beam indication information. The first beam direction is the beam direction in which the first network device interferes most strongly with the second network device. The first network device acquires the target terminal device located in the direction of the first beam from among the terminal devices within the first network device; The first network device adjusts the scheduling time slots of the downlink services of the target terminal device; The step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device includes: Obtain the first terminal device in the cell access process among the terminal devices within the first network device; Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access; The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

11. A device for suppressing cross-link interference, characterized in that, Applied to a first network device, the device includes: The first receiving module is used to receive interference beam indication information sent by the second network device; The interference direction determination module is used to determine, based on the interference beam indication information, the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device, wherein the first beam direction is the beam direction in which the first network device interferes most strongly with the second network device. The device acquisition module is used to acquire the target terminal device located in the direction of the first beam among the terminal devices in the first network device; The first adjustment module is used to adjust the scheduling time slots of downlink services of the target terminal device; The device acquisition module includes: The first acquisition submodule is used to acquire the first terminal device in the cell access process among the terminal devices in the first network device; The first determining submodule is used to determine the target synchronization signal block that has a mapping relationship with the target preamble based on the pre-determined mapping relationship between the preamble and the synchronization signal block, wherein the target preamble is the preamble used by the first terminal device for random access. The second acquisition submodule is used to acquire the terminal device in the first terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction, and use it as the target terminal device.

12. A device for suppressing cross-link interference, characterized in that, Applied to a second network device, the device includes: An indication information acquisition module is used to acquire interference beam indication information, wherein the interference beam indication information is used to indicate the first beam direction in which the downlink transmission of the first network device interferes with the uplink transmission of the second network device; The first transmitting module is used to transmit the interference beam indication information to the first network device; Wherein, after the first network device receives the interference beam indication information sent by the second network device, the first network device determines the first beam direction of the downlink transmission of the first network device interfering with the uplink transmission of the second network device according to the interference beam indication information. The first beam direction is the beam direction in which the first network device interferes most strongly with the second network device. The first network device acquires the target terminal device located in the direction of the first beam from among the terminal devices within the first network device; The first network device adjusts the scheduling time slots of the downlink services of the target terminal device; The step of acquiring the target terminal device located in the first beam direction among the terminal devices within the first network device includes: Obtain the first terminal device in the cell access process among the terminal devices within the first network device; Based on the predetermined mapping relationship between the preamble and the synchronization signal block, a target synchronization signal block that has a mapping relationship with the target preamble is determined, wherein the target preamble is the preamble used by the first terminal device for random access; The terminal device whose beam direction of the target synchronization signal block is the same as the first beam direction is selected as the target terminal device.

13. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program that causes the processor to perform the method according to any one of claims 1 to 6, or to perform the method according to any one of claims 7 to 8.

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