Synchronization signal block (SSB) sending method, network equipment and device

Abstract

Provided in the present application are a synchronization signal block (SSB) sending method, network device and apparatus, the method being applied to the network device, the network device comprising a plurality of cells, the method comprising: segmenting a first frequency domain resource to obtain a plurality of sub-frequency domain resources under the first frequency domain resource, the first frequency domain resource being a frequency domain resource for sending an SSB, the plurality of sub-frequency domain resources are not overlapped with each other; in the plurality of sub-frequency domain resources, respectively determining sub-frequency domain resources, which are respectively used for sending the SSB, of the plurality of cells, the sub-frequency domain resources, which are respectively used for sending the SSB, of the plurality of cells are different; and respectively sending the SSBs to the terminals in the plurality of cells based on the sub-frequency domain resources, used for sending the SSBs, of the plurality of cells. According to the scheme, the spectrum utilization rate can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method, network equipment and device for sending a synchronization signal block (SSB). Background Art

[0002] The New Radio (NR) frequency division duplex (FDD) network has significant advantages such as low frequency, long coverage distance, strong diffraction capability, strong signal penetration capability and low network cost, but it has the disadvantages of small bandwidth and low capacity. Therefore, it is usually used as the basic coverage layer of the NR network.

[0003] The current NR FDD network does not support Massive multiple input multiple output (Massive MIMO) technology, and uses Synchronization Signal / PBCH block (SSB) wide-wave coverage. In the scenario of SSB wide-wave coverage, there will be mutual interference when SSB beams are sent between different cells. In order to avoid mutual interference between SSB beams between cells, the current solution is to use the value of the cell's Physical Cell Identifier (PCI) modulo 3 to determine the time domain position of the cell sending SSB, so that adjacent cells send SSB at different time domain positions.

[0004] However, this SSB transmission method requires that services are not scheduled at the time-frequency positions of the SSBs corresponding to different neighboring cells, resulting in low spectrum utilization. Summary of the invention

[0005] The present application provides a method, network equipment and device for sending a synchronization signal block (SSB) to improve spectrum utilization.

[0006] In a first aspect, the present application provides a method for sending an SSB, which is applied to a network device, wherein the network device includes multiple cells, and the method includes:

[0007] Segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other;

[0008] Among the multiple sub-frequency domain resources, respectively determine the sub-frequency domain resources used by the multiple cells to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different;

[0009] Based on the sub-frequency domain resources of multiple cells used to send SSB, SSB is sent to terminals in multiple cells respectively.

[0010] In a possible implementation manner, segmenting the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource includes:

[0011] Obtain frequency domain configuration information, the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset;

[0012] Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, a plurality of global synchronization channel numbers GSCN are determined in the first frequency domain resource, and the plurality of GSCNs are used to respectively indicate different frequency domain positions in the first frequency domain resource;

[0013] Based on different frequency domain positions indicated by the multiple GSCNs, the first frequency domain resources are segmented to obtain multiple sub-frequency domain resources.

[0014] In a possible implementation, among multiple sub-frequency domain resources, respectively determining sub-frequency domain resources for each of the multiple cells to send the SSB includes:

[0015] Obtaining a physical cell identifier PCI of each of the multiple cells;

[0016] Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation;

[0017] Based on the preset corresponding relationship between the remainder and multiple sub-frequency domain resources, and the remainders of the PCIs of multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

[0018] In a possible implementation, based on sub-frequency domain resources used by each of the multiple cells to send the SSB, respectively sending the SSB to terminals in the multiple cells includes:

[0019] determining a plurality of time domain resources for transmitting the SSB;

[0020] Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send the SSB, or determine the first time domain resource as the target time domain resource for each of the multiple cells to send the SSB, wherein the first time domain resource is any one of the multiple time domain resources;

[0021] Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used to send SSB, SSB is sent to the terminals in the multiple cells respectively.

[0022] In a possible implementation manner, when the target time domain resources used by the multiple cells for sending the SSB are all first time domain resources, the method further includes:

[0023] Receiving multiple configuration measurement reports reported by sample terminals under each of the cells;

[0024] Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with;

[0025] When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

[0026] In a possible implementation, updating target time domain resources for sending SSBs in each of the multiple cells includes:

[0027] Based on the neighboring relationship between multiple cells, a minimum spanning tree is constructed, which includes nodes corresponding to each cell and lines between the nodes. Two cells corresponding to two nodes connected by a line are neighboring cells to each other.

[0028] Determine the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree relative to the root node except the root node, wherein the depths of other nodes relative to the root node are the number of hops from other nodes to the root node;

[0029] Based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, the target time domain resources for sending SSB in multiple cells are updated.

[0030] In a possible implementation, determining the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree other than the root node relative to the root node includes:

[0031] Determine the number of sample terminals in each cell;

[0032] Based on the number of sample terminals in each cell, determine the weight of the node corresponding to each cell, wherein the weight of the node corresponding to the cell is negatively correlated with the number of sample terminals in the cell;

[0033] Based on the weights of the nodes corresponding to each cell, the depths of the root node and other nodes relative to the root node are determined.

[0034] In a possible implementation, based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, updating the target time domain resources for sending SSBs of the multiple cells respectively includes:

[0035] Determine the first time domain resource or the second time domain resource as the target time domain resource for the cell corresponding to the root node to send the SSB, and the second time domain resource is any time domain resource other than the first time domain resource among the multiple time domain resources;

[0036] Based on the depths of other nodes relative to the root node, determine the first type of nodes and the second type of nodes, the first type of nodes are nodes whose depths relative to the root node are even numbers among other nodes, and the second type of nodes are nodes whose depths relative to the root node are odd numbers among other nodes;

[0037] Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

[0038] In a second aspect, the present application provides a network device, including a memory, a transceiver, and a processor;

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

[0040] Segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other;

[0041] Among the multiple sub-frequency domain resources, respectively determine the sub-frequency domain resources used by the multiple cells included in the network device to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different;

[0042] Based on the sub-frequency domain resources of multiple cells used to send SSB, SSB is sent to terminals in multiple cells respectively.

[0043] In a possible implementation manner, segmenting the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource includes:

[0044] Obtain frequency domain configuration information, the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset;

[0045] Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, a plurality of GSCNs are determined in the first frequency domain resource, where the plurality of GSCNs are used to respectively indicate a different frequency domain position in the first frequency domain resource;

[0046] Based on different frequency domain positions indicated by the multiple GSCNs, the first frequency domain resources are segmented to obtain multiple sub-frequency domain resources.

[0047] In a possible implementation, among multiple sub-frequency domain resources, respectively determining sub-frequency domain resources for each of the multiple cells to send the SSB includes:

[0048] Get the PCI of each of the multiple cells;

[0049] Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation;

[0050] Based on the preset corresponding relationship between the remainder and multiple sub-frequency domain resources, and the remainders of the PCIs of multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

[0051] In a possible implementation, based on sub-frequency domain resources used by each of the multiple cells to send the SSB, respectively sending the SSB to terminals in the multiple cells includes:

[0052] determining a plurality of time domain resources for transmitting the SSB;

[0053] Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send the SSB, or determine the first time domain resource as the target time domain resource for each of the multiple cells to send the SSB, wherein the first time domain resource is any one of the multiple time domain resources;

[0054] Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used to send SSB, SSB is sent to the terminals in the multiple cells respectively.

[0055] In a possible implementation manner, when the target time domain resources used by multiple cells for sending SSBs are all first time domain resources, the processor is further configured to perform the following operations:

[0056] Receiving multiple configuration measurement reports reported by sample terminals under each of the cells;

[0057] Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with;

[0058] When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

[0059] In a possible implementation, updating target time domain resources for sending SSBs in each of the multiple cells includes:

[0060] Based on the neighboring relationship between multiple cells, a minimum spanning tree is constructed, which includes nodes corresponding to each cell and lines between the nodes. Two cells corresponding to two nodes connected by a line are neighboring cells to each other.

[0061] Determine the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree relative to the root node except the root node, wherein the depths of other nodes relative to the root node are the number of hops from other nodes to the root node;

[0062] Based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, the target time domain resources for sending SSB in multiple cells are updated.

[0063] In a possible implementation, determining the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree other than the root node relative to the root node includes:

[0064] Determine the number of sample terminals in each cell;

[0065] Based on the number of sample terminals in each cell, determine the weight of the node corresponding to each cell, wherein the weight of the node corresponding to the cell is negatively correlated with the number of sample terminals in the cell;

[0066] Based on the weights of the nodes corresponding to each cell, the depths of the root node and other nodes relative to the root node are determined.

[0067] In a possible implementation, based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, updating the target time domain resources for sending SSBs of the multiple cells respectively includes:

[0068] Determine the first time domain resource or the second time domain resource as the target time domain resource for the cell corresponding to the root node to send the SSB, and the second time domain resource is any time domain resource other than the first time domain resource among the multiple time domain resources;

[0069] Based on the depths of other nodes relative to the root node, determine the first type of nodes and the second type of nodes, the first type of nodes are nodes whose depths relative to the root node are even numbers among other nodes, and the second type of nodes are nodes whose depths relative to the root node are odd numbers among other nodes;

[0070] Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

[0071] In a third aspect, the present application provides a SSB sending device, which is applied to a network device, wherein the network device includes multiple cells, and the SSB sending device includes:

[0072] A segmentation module is used to segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other;

[0073] A processing module, used to respectively determine, from among the multiple sub-frequency domain resources, the sub-frequency domain resources used by the multiple cells to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different;

[0074] The sending module is used to send SSB to terminals in multiple cells respectively based on the sub-frequency domain resources used by the multiple cells to send SSB.

[0075] In a possible implementation, the segmentation module is specifically used for:

[0076] Obtain frequency domain configuration information, the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset;

[0077] Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, a plurality of global synchronization channel numbers GSCN are determined in the first frequency domain resource, and the plurality of GSCNs are used to respectively indicate different frequency domain positions in the first frequency domain resource;

[0078] Based on different frequency domain positions indicated by the multiple GSCNs, the first frequency domain resources are segmented to obtain multiple sub-frequency domain resources.

[0079] In a possible implementation manner, the processing module is specifically used for:

[0080] Obtaining a physical cell identifier PCI of each of the multiple cells;

[0081] Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation;

[0082] Based on the preset corresponding relationship between the remainder and multiple sub-frequency domain resources, and the remainders of the PCIs of multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

[0083] In a possible implementation manner, the sending module is specifically configured to:

[0084] determining a plurality of time domain resources for transmitting the SSB;

[0085] Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send the SSB, or determine the first time domain resource as the target time domain resource for each of the multiple cells to send the SSB, wherein the first time domain resource is any one of the multiple time domain resources;

[0086] Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used to send SSB, SSB is sent to the terminals in the multiple cells respectively.

[0087] In a possible implementation manner, when the target time domain resources used by the multiple cells for sending the SSB are all first time domain resources, the processing module is further used to:

[0088] Receiving multiple configuration measurement reports reported by sample terminals under each of the cells;

[0089] Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with;

[0090] When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

[0091] In a possible implementation manner, the processing module is further configured to:

[0092] Based on the neighboring relationship between multiple cells, a minimum spanning tree is constructed, which includes nodes corresponding to each cell and lines between the nodes. Two cells corresponding to two nodes connected by a line are neighboring cells to each other.

[0093] Determine the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree relative to the root node except the root node, wherein the depths of other nodes relative to the root node are the number of hops from other nodes to the root node;

[0094] Based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, the target time domain resources for sending SSB in multiple cells are updated.

[0095] In a possible implementation manner, the processing module is further configured to:

[0096] Determine the number of sample terminals in each cell;

[0097] Based on the number of sample terminals in each cell, determine the weight of the node corresponding to each cell, wherein the weight of the node corresponding to the cell is negatively correlated with the number of sample terminals in the cell;

[0098] Based on the weights of the nodes corresponding to each cell, the depths of the root node and other nodes relative to the root node are determined.

[0099] In a possible implementation manner, the processing module is further configured to:

[0100] Determine the first time domain resource or the second time domain resource as the target time domain resource for the cell corresponding to the root node to send the SSB, and the second time domain resource is any time domain resource other than the first time domain resource among the multiple time domain resources;

[0101] Based on the depths of other nodes relative to the root node, determine the first type of nodes and the second type of nodes, the first type of nodes are nodes whose depths relative to the root node are even numbers among other nodes, and the second type of nodes are nodes whose depths relative to the root node are odd numbers among other nodes;

[0102] Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

[0103] In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program is used to enable a computer to execute the SSB sending method described in any one of the first aspects.

[0104] The present application provides a method, network device and apparatus for sending SSB. The network device performs segmented processing on the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource. The first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap each other. Then, among the multiple sub-frequency domain resources, the sub-frequency domain resources used by multiple cells to send SSB are determined respectively, wherein the sub-frequency domain resources used by the multiple cells to send SSB are different, so that based on the sub-frequency domain resources used by the multiple cells to send SSB, the SSB is sent to the terminals in the multiple cells respectively. Since the sub-frequency domain resources used by the multiple cells to send SSB are different, the multiple cells are staggered in the frequency domain during the process of sending SSB, so that service processing can be performed in the same time domain, so that service scheduling can be performed at the time-frequency position of the SSB corresponding to different neighboring cells, thereby improving spectrum utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0105] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0106] Figure 1 A schematic diagram of multiple cells determining a time domain position for sending SSB according to PCI mode 3;

[0107] Figure 2 A schematic diagram of related service scheduling based on staggered time slots for sending SSBs in PCI mode 3;

[0108] Figure 3 A flowchart of a method for sending SSB provided in an embodiment of the present application;

[0109] Figure 4 A flowchart for updating target time domain resources for sending SSB in multiple cells provided in an embodiment of the present application;

[0110] Figure 5 A schematic diagram of a minimum spanning tree provided in an embodiment of the present application;

[0111] Figure 6 A schematic diagram of the SSB frequency domain stagger optimization solution provided in an embodiment of the present application;

[0112] Figure 7 Schematic diagram of the PCI mode 3 optimization solution provided in the embodiment of the present application Figure 1 ;

[0113] Figure 8Schematic diagram of the PCI mode 3 optimization solution provided in the embodiment of the present application Figure 2 ;

[0114] Fig. 9 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0115] Fig.10 A structural diagram of an SSB sending device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0116] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0117] NR FDD network has significant advantages of low frequency, long coverage distance, strong diffraction capability, strong signal penetration capability and low network cost, but it also has disadvantages of small bandwidth and low capacity, so it is usually used as the basic coverage layer of NR network.

[0118] The current NR FDD network does not support Massive MIMO and uses SSB broadband coverage. In the SSB broadband coverage scenario, there will be mutual interference when SSB beams are sent between different cells. In order to avoid mutual interference between SSB beams between cells, the current solution is to use the value of PCI mode (MOD) 3 of the cell to determine the time domain position of the cell to send SSB, so that adjacent cells send SSB at different time domain positions.

[0119] The 3rd Generation Partnership Project (3GPP) protocol R15 version defines five different SSB patterns corresponding to the time domain position relationship of SSB: For a half frame (5ms) with SSB, the number of candidate SSBs and the first symbol index position are determined according to the subcarrier spacing of the SSB. This provision can correspond to the design of narrow beam scanning in high-frequency TDD, while in FDD, the terminal can eliminate co-frequency adjacent cell interference through flexible configuration of the SSB time domain.

[0120] Taking NR 700M FDD as an example, the commonly used SSB interference elimination solutions are as follows:

[0121] The index of the first symbol of the candidate SSB is {2,8}+14*n. When the carrier frequency is less than or equal to 3 GHz, n=0,1. That is, there are 4 time domain positions within 5 ms where SSB can be configured. Therefore, the transmission position of SSB in the time domain is determined according to the PCI MOD3 of each cell.

[0122] Figure 1 The schematic diagram is a diagram of determining the time domain position for sending SSB according to PCI mode 3 for multiple cells, such as Figure 1 As shown, one half frame is 5ms, and for the index of the first symbol of the candidate SSB {2,8}+14*n, when the carrier frequency is less than or equal to 3GHz, the value of n is 0 or 1. When n=0, the index of the first symbol of the candidate SSB can be determined to be 2 and 8; when n=1, the index of the first symbol of the candidate SSB can be determined to be 16 and 22.

[0123] like Figure 1 As shown, based on the above method, four time domain positions for sending SSB in a half frame can be determined, namely, the time domain position with an index of 2 for the first symbol (recorded as time domain resource a), the time domain position with an index of 8 for the first symbol (recorded as time domain resource b), the time domain position with an index of 16 for the first symbol (recorded as time domain resource c), and the time domain position with an index of 22 for the first symbol (recorded as time domain resource d).

[0124] Then, for multiple cells, the corresponding time domain position is selected according to the PCI MOD3 values ​​of the multiple cells to send SSB. Figure 1 In the figure, SSB 0 indicates the SSB sent by the cell whose PCI MOD3 value is 0, that is, the cell whose PCIMOD3 value is 0 sends the SSB at the time domain position with an index of 2 of the first symbol; SSB 1 indicates the SSB sent by the cell whose PCI MOD3 value is 1, that is, the cell whose PCI MOD3 value is 1 sends the SSB at the time domain position with an index of 8 of the first symbol; SSB 2 indicates the SSB sent by the cell whose PCI MOD3 value is 2, that is, the cell whose PCI MOD3 value is 2 sends the SSB at the time domain position with an index of 16 of the first symbol.

[0125] In the standard network topology, multiple cells determine the time domain position for sending SSB according to PCI MOD3, which can basically eliminate SSB neighboring cell interference. However, this method of sending SSB requires that the neighboring cells do not schedule services at the corresponding SSB sending position to avoid SSB interference with the service channel. For details, see Figure 2 Example.

[0126] Figure 2FIG. 3 is a schematic diagram of related service scheduling based on the time slot of staggered transmission of SSB in PCI mode 3, as shown in FIG. Figure 2 As shown in FIG. 1 , the time domain positions of three cells for transmitting SSB are illustrated. Figure 2 In the example, three different time domain positions in a half frame are illustrated, and the three cells send SSBs at the three different time domain positions. For any time domain position, when a cell sends SSB at the time domain position, the other two cells cannot perform service scheduling at the time domain position.

[0127] In summary, on the one hand, the existing SSB time slot stagger optimization scheme requires PCI MOD3 not to schedule services for SSB positions in different neighboring cells, which will reduce spectrum utilization to a certain extent. Taking NR 700M FDD as an example, SSB needs to occupy 20 RBs in the frequency domain, and the bandwidth of the 700M cell is 30MHz or 160RBs, that is, in order to avoid SSB interference with the service channel, 1 / 8 of the bandwidth is lost in the symbols of scheduling SSB, and the sacrifice of spectrum resources is still relatively large. On the other hand, the above scheme can effectively avoid interference between SSB neighboring cells for standard topology networks, but in actual existing networks, due to irregular network topology and the existence of multipath scenarios, PCI MOD3 alone cannot completely interfere. There is no targeted solution for such legacy and severe interference scenarios.

[0128] Based on this, an embodiment of the present application provides a method for sending SSB to improve spectrum utilization. The solution of the embodiment of the present application will be introduced below in conjunction with the accompanying drawings.

[0129] Figure 3 A flowchart of a method for sending SSB provided in an embodiment of the present application, the method is applied to a network device, the network device includes multiple cells, such as Figure 3 As shown, the method includes:

[0130] S31, segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, the first frequency domain resource is a frequency domain resource used to send SSB, and the multiple sub-frequency domain resources do not overlap with each other.

[0131] The first frequency domain resource is a frequency domain resource used by the network device to send SSB. The bandwidth of the first frequency domain resource is usually large, and the frequency domain resource used by a cell to send SSB usually only occupies a small part of the first frequency domain resource. Therefore, the network device can segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, and these multiple sub-frequency domain resources do not overlap with each other.

[0132] The way of segmenting the first frequency domain resources can be either average segmentation or non-average segmentation. The embodiment of the present application does not limit this. As long as the bandwidth of the sub-frequency domain resources is sufficient for sending SSB, any segmentation method is acceptable.

[0133] Unlike the Primary Synchronisation Signal (PSS) and Secondary Synchronisation Signal (SSS) in Long Term Evolution (LTE), which are fixed in the middle of the bandwidth, there are many possible frequency domain positions of SSB in NR. There is a series of Global Synchronization Channel Numbers (GSCN) in NR, and each GSCN corresponds to a certain and absolute frequency position. The system will place the SSB on these GSCNs, and the alignment method is that the subcarrier No. 0 of the physical resource block (Resource Block, RB) No. 10 of the SSB is aligned with the GSCN, and the terminal will blindly detect the SSB one by one on these GSCNs. Therefore, in one possible implementation method, the first frequency domain resources can be segmented by determining multiple GSCNs. Specifically, the network device first obtains the frequency domain configuration information, which includes the absolute frequency point number, the frequency point number offset value and the subcarrier offset. Then, based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, multiple GSCNs are determined in the first frequency domain resource, and the multiple GSCNs are used to respectively indicate different frequency domain positions in the first frequency domain resource. After obtaining the multiple GSCNs, based on the different frequency domain positions indicated by the multiple GSCNs, the first frequency domain resource is segmented to obtain multiple sub-frequency domain resources.

[0134] Taking NR FDD 700M as an example, the network equipment obtains the PCI information and frequency domain configuration information of the existing FDD cells in the area to be optimized, and determines the GSCN number corresponding to each cell based on the remainder obtained by PCI MOD3 of each cell.

[0135] For example, the downlink frequency band used is 758MHz-788MHz. The protocol stipulates that the downlink frequency band, absolute radio frequency channel number (ARFCN) and GSCN range are as shown in Table 1 and Table 2:

[0136] Table 1

[0137]

[0138]

[0139] Table 2

[0140] NR operating frequency band SSB SCS SSB mode Scope of GSCN n28 15kHz Case A 1901-<1>-2002

[0141] After the GSCN is defined, since the frequency domain position of ARFCN is absolute, the frequency domain position of GSCN is also absolute, so for each working frequency band divided by the ARFCN range, the GSCN within it is also fixed, as shown in Table 2. For the working frequency band n28, the sub-carrier spacing (SCS) of SSB is 15kHz, the time domain mode is Case A, and the range of GSCN is 1901-2002.

[0142] For the 5G frequency band range of 0-100 GHz, the 100 GHz frequency band is divided into a total of 3279165 grids, which are numbered starting from 0. Each number represents an absolute frequency domain position, and these numbers are called ARFCN. The frequency domain position can be determined according to the following formula (1):

[0143] F REF =F REF-Offs +ΔF Global (N REF -N REF-offs ) (1)

[0144] F EEF-Offs represents the frequency domain offset, ΔF Global Indicates the grid interval size, N REF Indicates the absolute frequency point number, N REF-Offs Indicates the number offset, F REF Indicates the absolute frequency domain position. The values ​​of the above parameters can be determined according to the following Table 3:

[0145] Table 3

[0146]

[0147] Get the basic configuration pointA ARFCN = 151720, where the frequency point number offset value and subcarrier offset are configured according to actual needs. According to PCI MOD3, 3 different GSCNs need to be obtained, and the calculation formula is as follows:

[0148]

[0149] Wherein, M and N are integers satisfying F=N*1200+M*50, F is the center frequency position of SSB, and the calculation formula of F is as follows:

[0150] F=F REF +k offsetToPointA *12*kSSB SCS +k ssb *k SSB SCS +10*12*k SSB SCS (3)

[0151] Among them, F REF Represents the absolute frequency domain position, and the calculation formula can be found in the above formula (1);

[0152] k offsetToPointA Indicates the frequency offset value. 12 means that one RB includes 12 subcarriers. SSB SCS represents the subcarrier spacing, k offsetToPointA *12*k SSB SCS Indicates the bandwidth of the frequency point number offset value;

[0153] k ssb represents the subcarrier offset, k ssb *k SSB SCS Indicates the bandwidth of the subcarrier offset;

[0154] 10*12*k SSB SCS Indicates a bandwidth of 10 RBs;

[0155] F REF +k offsetToPointA *12*k SSB SCS +k ssb *k SSB SCS , which represents the bottom frequency position of SSB, plus the bandwidth of 10 RB, the obtained F is the center frequency position of SSB.

[0156] Table 4 below illustrates the absolute frequency point number, frequency point number offset value and subcarrier offset. Based on these parameters, the corresponding GSCN can be obtained.

[0157] Table 4

[0158]

[0159] The calculation process is described by taking the absolute frequency point number of 151720, the frequency point number offset value of 135, and the subcarrier offset of 10 in the first row as an example.

[0160] As shown in the above example, the frequency band used is 0-3000MHz, so referring to Table 3, ΔF Global =5, F REF-Offs =0,N REF-Offs =0, substituting it into the above formula (1) we can get:

[0161] F REF =F REF-Offs +ΔF Global (N REF -N REF-Offs )

[0162] =151720*5=758600kHz

[0163] Then, F REF =758600, k offsetToPointA =135, k SSBSCs =15, k ssb =10 Substituting into the above formula (3), we can get:

[0164] F=758600+135*12*15+10*15+10*12*15

[0165] =784850kHz

[0166] Since M and N are integers satisfying F=N*1200+M*50, it can be obtained that M is 1 and N is 654. Substituting them into the above formula (2) yields:

[0167]

[0168] The solutions for other GSCNs are similar and will not be described here.

[0169] S32, among the multiple sub-frequency domain resources, respectively determine the sub-frequency domain resources used by the multiple cells to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different.

[0170] After obtaining multiple sub-frequency domain resources, sub-frequency domain resources for sending SSB are allocated to each cell. In the process of allocating sub-frequency domain resources to each cell, multiple sub-frequency domain resources can be allocated randomly or according to certain rules, as long as the sub-frequency domain resources used by multiple cells to send SSB are different.

[0171] In a possible time slot mode, sub-frequency domain resources can be allocated based on the PCI of the cell. Specifically, for multiple cells under the network device, the network device obtains the PCI of each of the multiple cells, and then performs a modulo operation on the PCI of each of the multiple cells and the preset value to obtain the remainders of the PCI of the multiple cells after the modulo operation. Among them, the preset value can be 3, or other values, such as 2, 6 or other possible values, which is not limited in the embodiment of the present application. That is, the allocation of multiple sub-frequency domain resources does not necessarily use PCI MOD3, but is only for the convenience of calculation. If PCI MOD2 / MOD6 or other calculation configuration schemes are used, the scheduling starting point configuration of the corresponding segment of the service channel can also be used to realize the sending of SSB. After obtaining the remainders of the PCI of multiple cells after the modulo operation, the network device determines the sub-frequency domain resources used by each of the multiple cells to send SSB based on the preset correspondence between the remainder and the multiple sub-frequency domain resources, and the remainders of the PCI of the multiple cells after the modulo operation.

[0172] Taking 700M as an example, by utilizing this feature, the frequency domain resources used by the cell to send SSB can be adjusted to different positions in the frequency domain according to PCI MOD3, that is, different frequency points in the same frequency band, and the SSB frequency domain position selection can be similar to the service channel interference randomization characteristics, and the first frequency domain resources are divided into three sections, namely sub-frequency domain resources A, sub-frequency domain resources B and sub-frequency domain resources C. The cell PCIMOD3 = 0, 1, 2, among which the sub-frequency domain resources used by the cell with PCI MOD3 = 0 to send SSB are sub-frequency domain resources A, the sub-frequency domain resources used by the cell with PCIMOD3 = 1 to send SSB are sub-frequency domain resources B, and the sub-frequency domain resources used by the cell with PCI MOD3 = 2 to send SSB are sub-frequency domain resources C. Since the resources used by multiple cells to send SSB are staggered in the frequency domain, there is no need to stagger them in the time domain. At the same time, in terms of business, interference randomization is carried out. Since the overall load of 5G is not high at present and the FDD network is positioned as the basic coverage layer, the business carrying capacity is relatively low. The small amount of segmented scheduled services and the SSB of the neighboring area also form a different frequency. At this point, the SSB co-frequency interference between different cells of PCI MOD3 and the interference of SSB to the business channel can be effectively solved.

[0173] S33, based on the sub-frequency domain resources of the multiple cells respectively used to send SSB, send SSB to the terminals in the multiple cells respectively.

[0174] After determining the sub-frequency domain resources used by each of the multiple cells to send SSB, for any cell among the multiple cells, the network device sends the SSB to the terminal in the cell on the sub-frequency domain resources used by the cell to send SSB.

[0175] In the process of sending SSB to the terminal in the cell, the network device needs time domain resources in addition to the corresponding sub-frequency domain resources. In one half frame, multiple time domain resources for sending SSB are included. The network device determines multiple time domain resources for sending SSB, and then allocates target time domain resources for sending SSB to each cell among the multiple time domain resources, so that SSB can be sent to the terminals in multiple cells respectively based on the sub-frequency domain resources and target time domain resources used by the multiple cells to send SSB.

[0176] In a possible implementation, for multiple time domain resources for sending SSB, the network device determines the multiple time domain resources as target time domain resources for sending SSB by each of the multiple cells. That is, for any one of the multiple cells, the target time domain resources for sending SSB by the cell include the multiple time domain resources, and the cell sends SSB on each of the multiple time domain resources, so the SSB is sent repeatedly multiple times.

[0177] Take NR 700M FDD as an example, please refer to Figure 1 , within a half frame, there are 4 time domain resources for sending SSB, and these 4 time domain resources are the target time domain resources for each cell to send SSB. For each cell, each cell sends SSB on these 4 time domain resources. Since the sub-frequency domain resources used by multiple cells to send SSB are different, that is, when multiple cells send SSB, they are already staggered in the frequency domain, so multiple cells can send SSB on the same time domain resource.

[0178] In this implementation, for any cell, the cell sends the same SSB on multiple different time domain resources. By merging multiple SSBs, the demodulation capability of the SSB can be improved.

[0179] In a possible implementation, for multiple time domain resources for sending SSB, the network device may determine the first time domain resource as the target time domain resource for each of the multiple cells to send SSB, wherein the first time domain resource is any one of the multiple time domain resources. That is, the target time domain resources for sending SSB by the multiple cells are the same, and are all the first time domain resources among the multiple time domain resources.

[0180] Take NR 700M FDD as an example, please refer to Figure 1In one half frame, there are four time domain resources used to send SSB, namely time domain resource a, time domain resource b, time domain resource c and time domain resource d. The network device can determine time domain resource a as the first time domain resource, and multiple cells send SSB on time domain resource a; the network device can also determine time domain resource b as the first time domain resource, and multiple cells send SSB on time domain resource b. The same is true for time domain resource c and time domain resource d, which will not be repeated here. Since the sub-frequency domain resources used by multiple cells to send SSB are different, that is, when multiple cells send SSB, they are already staggered in the frequency domain, so multiple cells can send SSB on the same time domain resource.

[0181] Taking the preset value of 3 as an example, configure the corresponding sub-frequency domain resources for the pilot network cells according to the value of PCI MOD3. At the same time, pay attention to modifying the corresponding cell measurement frequency configuration, frequency priority configuration and other related configuration information, and try to ensure that the mobility strategy is basically consistent with that before the modification.

[0182] Through short-term (half a day to one day) indicator follow-up, if abnormal problems occur, roll back in time and check whether there are omissions in the frequency-related parameter configuration, and modify it again after confirmation. If the network quality fluctuates normally, the next step of optimization can be carried out.

[0183] If the optimization area is mainly optimized for improving coverage, each cell will send the same SSB beam at the four SSB transmission opportunities (i.e., four time domain resources) within the period, and improve SSB demodulation by merging SSB information, and cooperate with the interference randomization strategy in terms of business. If business priority is the optimization direction, the SSB transmission opportunity within the period of each cell will be initially fixed to any position (i.e., the first time domain resource), and the original data of the initial configuration measurement report (Measurementreport Original, MRO) will be collected for several days for subsequent steps.

[0184] In the case where the target time domain resources used by multiple cells for sending SSB are all first time domain resources, interference may occur because the time domain resources used by multiple cells are the same. The network device can determine whether there is severe interference between cells based on the reported configuration measurement report.

[0185] The network device receives multiple configuration measurement reports reported by sample terminals under each cell. For any cell, the sample terminal under the cell can report the corresponding configuration measurement report. Each configuration measurement report can be used as a sampling point. The network device determines the target configuration measurement report from multiple configuration measurement reports, and the target configuration measurement report is the configuration measurement report reported by the sample terminal that is interfered with. Then, when the ratio of the number of target configuration measurement reports to the number of multiple configuration measurement reports is greater than a preset ratio, the network device updates the target time domain resources for sending SSBs in each of the multiple cells. Among them, the calculation formula for the ratio of the number of target configuration measurement reports to the number of multiple configuration measurement reports is as shown in the following formula (4):

[0186]

[0187] Among them, R is the number of target configuration measurement reports, that is, the number of sampling points with interference; K is the number of multiple configuration measurement reports, that is, the total number of sampling points; P is the ratio of the number of target configuration measurement reports to the number of multiple configuration measurement reports, that is, the ratio of the sampling points with interference to the total number of sampling points.

[0188] Taking the preset value set to 3 as an example, after the target time domain resources used by multiple cells to send SSB are determined as the first time domain resources, R represents the number of SSB "mode 3" interference sampling points, K represents the total number of MRO sampling points in multiple cells, and P represents the proportion of "mode 3" sampling points in a single adjacent cell.

[0189] When P is greater than or equal to the preset ratio, it is determined that the "mode 3" interference between the service cell and the neighboring cell is serious, and it is necessary to update the target time domain resources used by multiple cells to send SSB. The preset ratio is set according to actual needs, for example, it can be set to 10%, 12%, 13%, etc.

[0190] For cells with severe interference, the following Figure 4 The present invention introduces an implementation scheme for updating target time domain resources used by multiple cells to send SSB.

[0191] Figure 4 A flowchart for updating target time domain resources for sending SSB in multiple cells provided in an embodiment of the present application, such as Figure 4 As shown, including:

[0192] S41, constructing a minimum spanning tree based on the neighboring relationship between multiple cells, wherein the minimum spanning tree includes nodes corresponding to each cell and lines between the nodes, and two cells corresponding to two nodes connected by a line are neighboring cells.

[0193] The neighboring relationship between multiple cells is used to indicate whether any two cells in the multiple cells are adjacent. Each cell is represented by a node. If two cells are adjacent cells, the nodes corresponding to the two cells can be connected by an edge. The above operation is performed for any two cells in the multiple cells to obtain a weighted undirected graph. Then, the minimum spanning tree is generated by the Kruskal algorithm or the Prim algorithm. The minimum spanning tree includes the nodes corresponding to each cell and the lines between the nodes. The lines between the nodes are used to indicate that the two cells corresponding to the two connected nodes are adjacent cells to each other.

[0194] For example, the full optimization area NR 700M has a total of 58 stations and 172 cells. According to the above rules, "mode 3" interference seriously involves 41 cells, which are divided into 3 groups according to PCI MOD3, with the number of cells in each group being 12, 26, and 3 respectively. The minimum spanning trees are modeled according to the rules for the 3 groups, and the process of generating the minimum spanning tree is similar, which will not be repeated here.

[0195] S42, determining the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree relative to the root node except the root node, wherein the depths of other nodes relative to the root node are the number of hops from other nodes to the root node.

[0196] Specifically, the network device first determines the number of sample terminals under each cell, and then determines the weight of the node corresponding to each cell based on the number of sample terminals under each cell, wherein the weight of the node corresponding to the cell is negatively correlated with the number of sample terminals under the cell. For example, for any cell, the reciprocal of the number of sample terminals under the cell can be used as the weight of the node corresponding to the cell. After obtaining the weight of the node corresponding to each cell, the network device determines the depth of the root node and other nodes in the minimum spanning tree relative to the root node based on the weight of the node corresponding to each cell.

[0197] Figure 5 A schematic diagram of a minimum spanning tree provided in an embodiment of the present application, such as Figure 5 As shown, it includes root node 1 and other nodes, and other nodes include node 2, node 3, node 4, node 5 and node 6. The depth of other nodes relative to the root node refers to the number of hops from other nodes to the root node.

[0198] In the embodiment of the present application, one hop is one hop from one node in the minimum spanning tree to another node through an edge. For example, if the number of hops from node 2 to root node 1 is 1, then the depth of node 2 relative to root node 1 is 1, the number of hops from node 3 to root node 1 is 2, then the depth of node 3 relative to root node 1 is 2, the number of hops from node 5 to root node 1 is 3, then the depth of node 5 relative to root node 1 is 3, and so on.

[0199] S43, based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, update the target time domain resources for sending SSB in each of the multiple cells.

[0200] After determining the root node of the minimum spanning tree and the depth of other nodes relative to the root node, the target time domain resources for sending SSBs in multiple cells can be updated.

[0201] Specifically, the network device determines a second time domain resource from among multiple time domain resources, where the second time domain resource is any time domain resource from among the multiple time domain resources except the first time domain resource.

[0202] For the cell corresponding to the root node, the network device determines the first time domain resource or the second time domain resource as the target time domain resource for the cell corresponding to the root node to send SSB.

[0203] Based on the depths of other nodes relative to the root node, first-category nodes and second-category nodes are determined. First-category nodes are nodes whose depths relative to the root node are even numbers among other nodes, and second-category nodes are nodes whose depths relative to the root node are odd numbers among other nodes.

[0204] For the cell corresponding to the first type of node, the network device determines, in the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB as the target time domain resources used by the cell corresponding to the first type of node to send SSB.

[0205] For the cell corresponding to the second type of node, the network device determines, in the first time domain resources and the second time domain resources, a time domain resource different from the target time domain resource used by the cell corresponding to the root node to send SSB as the target time domain resource used by the cell corresponding to the second type of node to send SSB.

[0206] When allocating sub-frequency domain resources to multiple cells, the allocation is based on the modulus of the cell's PCI and the preset value. The value of the preset value can be set as needed, but due to the SSB composition, further processing is required for cell pairs with severe "modulus 3" interference. If the preset value takes other values, for example, if PCI MOD2 is used to calculate the sub-frequency domain resources of the cell for sending SSB, when the cell pair that requires special processing is actually judged, when the cell pair only meets MOD3 but not MOD2, the SSB has completed the frequency domain staggering and no further processing is required. Therefore, it is necessary to judge the cell pair with severe PCI MOD6 conflict. In the following embodiments, the preset value of 3 is used as an example for introduction.

[0207] Figure 6 A schematic diagram of the SSB frequency domain stagger optimization solution provided in the embodiment of the present application is shown in FIG. Figure 6As shown in FIG. 4 , four cells are illustrated, namely, cell 1, cell 2, cell 3 and cell 4. Figure 6 In the example, both cell 3 and cell 4 satisfy PCI MOD3 of 2, so the sub-frequency domain resources used to send SSB in cell 3 and cell 4 are the same. Assuming that there are a large number of sample terminals reporting periodic configuration measurement reports, and the measured serving cell is cell 3 and the neighboring cell is cell 4, the target time domain resources for sending SSB in cell 3 or cell 4 can be updated, and the frequency domain positions corresponding to the two cells do not schedule services.

[0208] Figure 7 Schematic diagram of the PCI mode 3 optimization solution provided in the embodiment of the present application Figure 1 ,like Figure 7 As shown, in Figure 6 Based on the above, the target time domain resources for sending SSB in cell 3 are updated. Since the interference between cell 3 and cell 4 is serious, the target time domain resources for sending SSB in cell 3 and cell 4 are staggered, and SSB is sent at different time domain positions. In the frequency domain, the sub-frequency domain resources for sending SSB in cell 3 and cell 4 remain unchanged. Figure 8 Schematic diagram of the PCI mode 3 optimization solution provided in the embodiment of the present application Figure 2 ,like Figure 8 As shown, in Figure 6 Based on the above, the target time domain resources for sending SSB in cell 3 are updated. Since the interference between cell 3 and cell 4 is serious, the target time domain resources for sending SSB in cell 3 and cell 4 are staggered, and SSB is sent at different time domain positions. In the frequency domain, the sub-frequency domain resources for sending SSB in cell 3 can also be further updated, so that the sub-frequency domain resources and target time domain resources for sending SSB in cell 3 and cell 4 are different.

[0209] The SSB sending method provided in the embodiment of the present application is applied to a network device, wherein the network device includes multiple cells, and the network device performs segmented processing on the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, wherein the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other; then, among the multiple sub-frequency domain resources, the sub-frequency domain resources for sending SSB of the multiple cells are respectively determined, wherein the sub-frequency domain resources for sending SSB of the multiple cells are different, and thus based on the sub-frequency domain resources for sending SSB of the multiple cells, the SSB is respectively sent to the terminals in the multiple cells. Since the sub-frequency domain resources for sending SSB of the multiple cells are different, the multiple cells are staggered in the frequency domain during the process of sending SSB, and therefore, service processing can be performed in the same time domain, so that service scheduling can be performed at the time-frequency position of SSB corresponding to different neighboring cells, thereby improving spectrum utilization.

[0210] Furthermore, the embodiment of the present application performs special treatment for cells with overlapping coverage and severe interference caused by PCI MOD3 conflicts, and adopts a scheme similar to time slot staggering, but uses a minimum spanning tree to hierarchically traverse and alternately use only the first two positions of SSB transmission in the period, and uses the first two transmission positions in the SSB period alternately in a hierarchical manner. At the same time, in order to avoid interference of SSB with neighboring service channels in such situations, each cell does not schedule services during the SSB period, and the loss of frequency domain resources is reduced by 50% compared with the existing scheme. The remaining cells are not specially treated, and there is no additional spectrum loss.

[0211] Fig. 9 A schematic diagram of the structure of a network device provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, the network device includes a memory 920, a transceiver 900, and a processor 910, wherein:

[0212] The memory 920 is used to store computer programs; the transceiver 900 is used to send and receive data under the control of the processor 910; the processor 910 is used to read the computer program in the memory 920 and perform the following operations:

[0213] Segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other;

[0214] Among the multiple sub-frequency domain resources, respectively determine the sub-frequency domain resources used by the multiple cells included in the network device to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different;

[0215] Based on the sub-frequency domain resources of multiple cells used to send SSB, SSB is sent to terminals in multiple cells respectively.

[0216] Specifically, the transceiver 900 is used to receive and send data under the control of the processor 910.

[0217] Among them, Fig. 9In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 910 and memory represented by memory 920. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 900 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which may include transmission media such as wireless channels, wired channels, optical cables, etc. The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 910 when performing operations.

[0218] Optionally, processor 910 may 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), and the processor may also adopt a multi-core architecture.

[0219] The processor calls the computer program stored in the memory to execute any method provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0220] In a possible implementation manner, segmenting the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource includes:

[0221] Obtain frequency domain configuration information, the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset;

[0222] Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, a plurality of GSCNs are determined in the first frequency domain resource, where the plurality of GSCNs are used to respectively indicate a different frequency domain position in the first frequency domain resource;

[0223] Based on different frequency domain positions indicated by the multiple GSCNs, the first frequency domain resources are segmented to obtain multiple sub-frequency domain resources.

[0224] In a possible implementation, among multiple sub-frequency domain resources, respectively determining sub-frequency domain resources for each of the multiple cells to send the SSB includes:

[0225] Get the PCI of each of the multiple cells;

[0226] Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation;

[0227] Based on the preset corresponding relationship between the remainder and multiple sub-frequency domain resources, and the remainders of the PCIs of multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

[0228] In a possible implementation, based on sub-frequency domain resources used by each of the multiple cells to send the SSB, respectively sending the SSB to terminals in the multiple cells includes:

[0229] determining a plurality of time domain resources for transmitting the SSB;

[0230] Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send the SSB, or determine the first time domain resource as the target time domain resource for each of the multiple cells to send the SSB, wherein the first time domain resource is any one of the multiple time domain resources;

[0231] Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used to send SSB, SSB is sent to the terminals in the multiple cells respectively.

[0232] In a possible implementation manner, when the target time domain resources used by the multiple cells for sending the SSB are all first time domain resources, the processor 910 is further configured to perform the following operations:

[0233] Receiving multiple configuration measurement reports reported by sample terminals under each of the cells;

[0234] Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with;

[0235] When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

[0236] In a possible implementation, updating target time domain resources for sending SSBs in each of the multiple cells includes:

[0237] Based on the neighboring relationship between multiple cells, a minimum spanning tree is constructed, which includes nodes corresponding to each cell and lines between the nodes. Two cells corresponding to two nodes connected by a line are neighboring cells to each other.

[0238] Determine the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree relative to the root node except the root node, wherein the depths of other nodes relative to the root node are the number of hops from other nodes to the root node;

[0239] Based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, the target time domain resources for sending SSB in multiple cells are updated.

[0240] In a possible implementation, determining the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree other than the root node relative to the root node includes:

[0241] Determine the number of sample terminals in each cell;

[0242] Based on the number of sample terminals in each cell, determine the weight of the node corresponding to each cell, wherein the weight of the node corresponding to the cell is negatively correlated with the number of sample terminals in the cell;

[0243] Based on the weights of the nodes corresponding to each cell, the depths of the root node and other nodes relative to the root node are determined.

[0244] In a possible implementation, based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, updating the target time domain resources for sending SSBs of the multiple cells respectively includes:

[0245] Determine the first time domain resource or the second time domain resource as the target time domain resource for the cell corresponding to the root node to send the SSB, and the second time domain resource is any time domain resource other than the first time domain resource among the multiple time domain resources;

[0246] Based on the depths of other nodes relative to the root node, determine the first type of nodes and the second type of nodes, the first type of nodes are nodes whose depths relative to the root node are even numbers among other nodes, and the second type of nodes are nodes whose depths relative to the root node are odd numbers among other nodes;

[0247] Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

[0248] It should be noted here that the above-mentioned network device provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0249] Fig.10 A schematic diagram of a structure of a SSB sending device provided in an embodiment of the present application is applied to a network device, wherein the network device includes multiple cells, such as Fig.10 As shown, the SSB sending device includes:

[0250] A segmentation module 1010 is used to segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other;

[0251] The processing module 1020 is used to respectively determine, from among the multiple sub-frequency domain resources, the sub-frequency domain resources used by the multiple cells to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different;

[0252] The sending module 1030 is used to send SSB to terminals in multiple cells respectively based on the sub-frequency domain resources used by the multiple cells to send SSB.

[0253] In a possible implementation, the segmentation module 1010 is specifically configured to:

[0254] Obtain frequency domain configuration information, the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset;

[0255] Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, a plurality of global synchronization channel numbers GSCN are determined in the first frequency domain resource, and the plurality of GSCNs are used to respectively indicate different frequency domain positions in the first frequency domain resource;

[0256] Based on different frequency domain positions indicated by the multiple GSCNs, the first frequency domain resources are segmented to obtain multiple sub-frequency domain resources.

[0257] In a possible implementation, the processing module 1020 is specifically configured to:

[0258] Obtaining a physical cell identifier PCI of each of the multiple cells;

[0259] Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation;

[0260] Based on the preset corresponding relationship between the remainder and multiple sub-frequency domain resources, and the remainders of the PCIs of multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

[0261] In a possible implementation, the sending module 1030 is specifically configured to:

[0262] determining a plurality of time domain resources for transmitting the SSB;

[0263] Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send the SSB, or determine the first time domain resource as the target time domain resource for each of the multiple cells to send the SSB, wherein the first time domain resource is any one of the multiple time domain resources;

[0264] Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used to send SSB, SSB is sent to the terminals in the multiple cells respectively.

[0265] In a possible implementation manner, when the target time domain resources used by the multiple cells for sending the SSB are all first time domain resources, the processing module 1020 is further used to:

[0266] Receiving multiple configuration measurement reports reported by sample terminals under each of the cells;

[0267] Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with;

[0268] When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

[0269] In a possible implementation manner, the processing module 1020 is further configured to:

[0270] Based on the neighboring relationship between multiple cells, a minimum spanning tree is constructed, which includes nodes corresponding to each cell and lines between the nodes. Two cells corresponding to two nodes connected by a line are neighboring cells to each other.

[0271] Determine the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree relative to the root node except the root node, wherein the depths of other nodes relative to the root node are the number of hops from other nodes to the root node;

[0272] Based on the root node of the minimum spanning tree and the depth of other nodes relative to the root node, the target time domain resources for sending SSB in multiple cells are updated.

[0273] In a possible implementation manner, the processing module 1020 is further configured to:

[0274] Determine the number of sample terminals in each cell;

[0275] Based on the number of sample terminals in each cell, determine the weight of the node corresponding to each cell, wherein the weight of the node corresponding to the cell is negatively correlated with the number of sample terminals in the cell;

[0276] Based on the weights of the nodes corresponding to each cell, the depths of the root node and other nodes relative to the root node are determined.

[0277] In a possible implementation manner, the processing module 1020 is further configured to:

[0278] Determine the first time domain resource or the second time domain resource as the target time domain resource for the cell corresponding to the root node to send the SSB, and the second time domain resource is any time domain resource other than the first time domain resource among the multiple time domain resources;

[0279] Based on the depths of other nodes relative to the root node, determine the first type of nodes and the second type of nodes, the first type of nodes are nodes whose depths relative to the root node are even numbers among other nodes, and the second type of nodes are nodes whose depths relative to the root node are odd numbers among other nodes;

[0280] Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

[0281] Specifically, the above-mentioned SSB sending device provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0282] It should be noted that the division of units / modules in the above embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, the functional units in the various embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated units may be implemented in the form of hardware or in the form of software functional units.

[0283] If the integrated unit is implemented in the form of 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 the present application is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

[0284] In some embodiments, a computer-readable storage medium is also provided, which stores a computer program, and the computer program is used to enable a computer to execute the SSB sending method provided by the above-mentioned method embodiments.

[0285] Specifically, the above-mentioned computer-readable storage medium provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0286] It should be noted that computer-readable storage media can be any available media or data storage devices that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0287] It should also be noted that the terms "first", "second", etc. in the embodiments of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0288] In the embodiments of the present application, the term "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0289] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0290] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0291] The terminal device involved in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0292] The network device involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0293] 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 multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

[0294] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt 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, etc.) that contain computer-usable program code.

[0295] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0296] 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 specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0297] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0298] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for sending a synchronization signal block SSB, characterized in that: Applied to a network device, the network device includes a plurality of cells, and the method includes: Segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other; Among the multiple sub-frequency domain resources, respectively determine the sub-frequency domain resources used by the multiple cells to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different; Based on the sub-frequency domain resources of the multiple cells used to send SSB, the SSB is sent to the terminals in the multiple cells respectively.

2. The method according to claim 1, characterized in that The segmenting of the first frequency domain resource to obtain a plurality of sub-frequency domain resources under the first frequency domain resource includes: Acquire frequency domain configuration information, where the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset; Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, determine a plurality of global synchronization channel numbers GSCN in the first frequency domain resource, wherein the plurality of GSCNs are used to respectively indicate different frequency domain positions in the first frequency domain resource; Based on the different frequency domain positions indicated by each of the multiple GSCNs, the first frequency domain resources are segmented to obtain the multiple sub-frequency domain resources.

3. The method according to claim 1 or 2, characterized in that: The determining, among the multiple sub-frequency domain resources, respectively the sub-frequency domain resources used by the multiple cells to send the SSB, includes: Obtaining a physical cell identifier PCI of each of the multiple cells; Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation; Based on the preset corresponding relationship between the remainder and the multiple sub-frequency domain resources, and the remainders of the PCIs of the multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

4. The method according to claim 1 or 2, characterized in that: The sending the SSB to terminals in the multiple cells respectively based on the sub-frequency domain resources used by the multiple cells to send the SSB includes: determining a plurality of time domain resources for transmitting the SSB; Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send SSB, or determine a first time domain resource as a target time domain resource for each of the multiple cells to send SSB, wherein the first time domain resource is any one of the multiple time domain resources; Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used for sending SSB, SSB is sent to the terminals in the multiple cells respectively.

5. The method according to claim 4, characterized in that In a case where the target time domain resources used by the multiple cells for sending SSBs are all the first time domain resources, the method further includes: Receiving multiple configuration measurement reports reported by sample terminals under each of the cells; Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with; When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

6. The method according to claim 5, characterized in that The updating of the target time domain resources for each of the multiple cells to send the SSB includes: Based on the neighboring relationship between the multiple cells, a minimum spanning tree is constructed, wherein the minimum spanning tree includes nodes corresponding to each of the cells and lines between the nodes, and two cells corresponding to two nodes connected by the line are neighboring cells to each other; Determine a root node of the minimum spanning tree, and depths of other nodes in the minimum spanning tree, except the root node, relative to the root node, wherein the depths of other nodes relative to the root node are the number of hops from the other nodes to the root node; Based on the root node of the minimum spanning tree and the depth of the other nodes relative to the root node, the target time domain resources for sending SSB by each of the multiple cells are updated.

7. The method according to claim 6, characterized in that The determining of the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree except the root node relative to the root node includes: Determining the number of sample terminals in each of the cells; Determine, based on the number of sample terminals in each of the cells, a weight of a node corresponding to each of the cells, wherein the weight of a node corresponding to a cell is negatively correlated with the number of sample terminals in the cell; Based on the weights of the nodes corresponding to the cells, the depths of the root node and the other nodes relative to the root node are determined.

8. The method according to claim 6, characterized in that The updating, based on the root node of the minimum spanning tree and the depth of the other nodes relative to the root node, of the target time domain resources for sending the SSB by each of the multiple cells includes: Determine the first time domain resource or the second time domain resource as a target time domain resource for the cell corresponding to the root node to send the SSB, where the second time domain resource is any time domain resource among the multiple time domain resources except the first time domain resource; Based on the depths of the other nodes relative to the root node, determine a first type of node and a second type of node, wherein the first type of node is a node whose depth relative to the root node is an even number among the other nodes, and the second type of node is a node whose depth relative to the root node is an odd number among the other nodes; Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

9. A network device, characterized in that: Including memory, transceiver, processor; A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Segment the first frequency domain resource to obtain multiple sub-frequency domain resources under the first frequency domain resource, where the first frequency domain resource is a frequency domain resource for sending SSB, and the multiple sub-frequency domain resources do not overlap with each other; Among the multiple sub-frequency domain resources, respectively determine the sub-frequency domain resources used by the multiple cells included in the network device to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different; Based on the sub-frequency domain resources of the multiple cells used to send SSB, the SSB is sent to the terminals in the multiple cells respectively.

10. The network device according to claim 9, characterized in that: The segmenting of the first frequency domain resource to obtain a plurality of sub-frequency domain resources under the first frequency domain resource includes: Acquire frequency domain configuration information, where the frequency domain configuration information includes an absolute frequency point number, a frequency point number offset value, and a subcarrier offset; Based on the absolute frequency point number, the frequency point number offset value and the subcarrier offset, determine a plurality of GSCNs in the first frequency domain resource, wherein the plurality of GSCNs are used to respectively indicate a different frequency domain position in the first frequency domain resource; Based on the different frequency domain positions indicated by each of the multiple GSCNs, the first frequency domain resources are segmented to obtain the multiple sub-frequency domain resources.

11. The network device according to claim 9 or 10, characterized in that: The determining, among the multiple sub-frequency domain resources, respectively the sub-frequency domain resources used by the multiple cells to send the SSB, includes: Obtaining PCIs of the respective cells; Performing a modulo operation on the PCIs of the multiple cells and a preset value to obtain respective remainders of the PCIs of the multiple cells after the modulo operation; Based on the preset corresponding relationship between the remainder and the multiple sub-frequency domain resources, and the remainders of the PCIs of the multiple cells after the modulo operation, the sub-frequency domain resources of the multiple cells used to send SSB are determined.

12. The network device according to claim 9 or 10, characterized in that: The sending the SSB to terminals in the multiple cells respectively based on the sub-frequency domain resources used by the multiple cells to send the SSB includes: determining a plurality of time domain resources for transmitting the SSB; Determine the multiple time domain resources as target time domain resources for each of the multiple cells to send SSB, or determine a first time domain resource as a target time domain resource for each of the multiple cells to send SSB, wherein the first time domain resource is any one of the multiple time domain resources; Based on the sub-frequency domain resources and target time domain resources of the multiple cells respectively used for sending SSB, SSB is sent to the terminals in the multiple cells respectively.

13. The network device according to claim 12, characterized in that: In a case where the target time domain resources used by the multiple cells for sending SSBs are all the first time domain resources, the processor is further configured to perform the following operations: Receiving multiple configuration measurement reports reported by sample terminals under each of the cells; Determine a target configuration measurement report among the multiple configuration measurement reports, where the target configuration measurement report is a configuration measurement report reported by the sample terminal that is interfered with; When the ratio of the number of the target configuration measurement reports to the number of the multiple configuration measurement reports is greater than or equal to a preset ratio, the target time domain resources for sending SSB by each of the multiple cells are updated.

14. The network device according to claim 13, characterized in that: The updating of the target time domain resources for each of the multiple cells to send the SSB includes: Based on the neighboring relationship between the multiple cells, a minimum spanning tree is constructed, wherein the minimum spanning tree includes nodes corresponding to each of the cells and lines between the nodes, and two cells corresponding to two nodes connected by the line are neighboring cells to each other; Determine a root node of the minimum spanning tree, and depths of other nodes in the minimum spanning tree, except the root node, relative to the root node, wherein the depths of other nodes relative to the root node are the number of hops from the other nodes to the root node; Based on the root node of the minimum spanning tree and the depth of the other nodes relative to the root node, the target time domain resources for sending SSB by each of the multiple cells are updated.

15. The network device according to claim 14, characterized in that: The determining of the root node of the minimum spanning tree and the depths of other nodes in the minimum spanning tree except the root node relative to the root node includes: Determining the number of sample terminals in each of the cells; Determine, based on the number of sample terminals in each of the cells, a weight of a node corresponding to each of the cells, wherein the weight of a node corresponding to a cell is negatively correlated with the number of sample terminals in the cell; Based on the weights of the nodes corresponding to the cells, the depths of the root node and the other nodes relative to the root node are determined.

16. The network device according to claim 14, characterized in that: The updating, based on the root node of the minimum spanning tree and the depth of the other nodes relative to the root node, of the target time domain resources for sending the SSB by each of the multiple cells includes: Determine the first time domain resource or the second time domain resource as a target time domain resource for the cell corresponding to the root node to send the SSB, where the second time domain resource is any time domain resource among the multiple time domain resources except the first time domain resource; Based on the depths of the other nodes relative to the root node, determine a first type of node and a second type of node, wherein the first type of node is a node whose depth relative to the root node is an even number among the other nodes, and the second type of node is a node whose depth relative to the root node is an odd number among the other nodes; Among the first time domain resources and the second time domain resources, the time domain resources that are the same as the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the first type of node to send SSB, and the time domain resources that are different from the target time domain resources used by the cell corresponding to the root node to send SSB are determined as the target time domain resources used by the cell corresponding to the second type of node to send SSB.

17. A SSB transmitting device, characterized in that: Applied to a network device, the network device includes a plurality of cells, and the device includes: A segmentation module, configured to segment the first frequency domain resource to obtain a plurality of sub-frequency domain resources under the first frequency domain resource, wherein the first frequency domain resource is a frequency domain resource for sending SSB, and the plurality of sub-frequency domain resources do not overlap with each other; A processing module, configured to respectively determine, from among the multiple sub-frequency domain resources, sub-frequency domain resources used by the multiple cells to send the SSB, wherein the sub-frequency domain resources used by the multiple cells to send the SSB are different; The sending module is used to send SSB to the terminals in the multiple cells respectively based on the sub-frequency domain resources used by the multiple cells to send SSB.

18. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is used to cause a computer to execute the SSB sending method according to any one of claims 1 to 8.

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