Cell switching method and device, network equipment, terminal, storage medium and product

Abstract

The invention provides a cell switching method and device, network equipment, a terminal, a storage medium and a product, and relates to the technical field of communication, and the cell switching method comprises the following steps: receiving a switching request sent by second network equipment; the switching request comprises position information of the terminal and a first SSB index of a third cell measured by the terminal; and when it is judged that the terminal is located in a beam coverage range corresponding to the second SSB index of the first cell according to the position information and the first SSB index of the third cell is matched with the second SSB index of the first cell, sending a switching response message to the second network device. Under the condition that the first SSB index, measured by the terminal, of the third cell is matched with the second SSB index, measured by the terminal, of the first cell of the terminal, the subsequent switching process is carried out, and it is guaranteed that the beam direction of the terminal is matched with the beam direction of the target cell.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a cell switching method, device, network equipment, terminal, storage medium and product. Background Art

[0002] The 3rd generation partnership project (3GPP) protocol associates the Physical Random Access Channel (PRACH) resources in different frequency domains with the Synchronization Signal / PBCH Block index (SSB index), or associates different preambles with the SSB index. The base station can infer that the Synchronization Signal / PBCH Block (SSB) is the best downlink beam for this terminal through the preamble index detected in different time or frequency domains.

[0003] In the existing cell switching process, the terminal first receives the measurement and control message of the source cell, and then measures the master information block (MIB) of the cell at each frequency point, obtains the SSB index of the measured cell in the lowest four bits of the MIB, and then reports the SSB-Index of the measured cell to the source cell in the measurement report. The source cell sends the SSB-Index of the measured cell to the target cell through the switching process, and the target cell selects the PRACH resource of the random access channel occasion (RO) corresponding to the SSB index for the terminal.

[0004] However, the existing low-altitude coverage scenario is in a propagation environment along the line-of-sight (LOS) path, with serious wireless signal crossover, a long cell coverage radius, and a large coverage radius. In addition, in the low-altitude coverage scenario, the air-ground co-frequency coverage, that is, there are a large number of ground cells within the area of ​​a cell covered by the air, resulting in a doubling of the probability of confusion of the physical cell identifier (PCI). This will result in the terminal measuring the SSB-Index of cell A during the cell switching process, but the SSB-Index of cell B is reconfigured. The SSB-Index of cell A is different from the SSB-Index of cell B, so the terminal cannot receive MSG2 under the beam of the SSB-Index of cell B, which leads to a switching failure. Summary of the invention

[0005] The present invention provides a cell switching method, device, network equipment, terminal, storage medium and product, which are used to solve the problem of switching failure caused by the inconsistency between the SSB index of the cell measured by the terminal and the SSB index of the target cell in the existing cell switching process.

[0006] In order to solve the above technical problems, the embodiments of the present invention provide the following technical solutions: In a first aspect, an embodiment of the present invention provides a cell switching method, which is applied to a first network device, and the method includes: receiving a handover request sent by a second network device, the handover request being used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal; When it is determined based on the location information that the terminal is located in the beam coverage range corresponding to the second SSB index of the first cell, and the first SSB index of the third cell matches the second SSB index of the first cell, a switching response message is sent to the second network device; the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0007] Optionally, the method further comprises: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, sending a random access response MSG2 to the terminal in all beam directions of the first cell; Receive a radio link control RRC reconfiguration completion message sent by the terminal, where the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0008] Optionally, the method further comprises: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, first data information is sent in sequence at the physical downlink shared channel PDSCH resource position corresponding to each beam of the first cell, where the first data information includes a random access response MSG2 and the SSB index corresponding to the beam; Receive an RRC reconfiguration completion message sent by the terminal, where the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is a beam through which the terminal receives the first data information.

[0009] Optionally, the method further comprises: Send first indication information to the second network device, where the first indication information is used to indicate a PDSCH resource position corresponding to each beam of the first cell.

[0010] Optionally, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different.

[0011] Optionally, the method further comprises: When the physical cell identifier PCI of the third cell is the same as the PCI of the first cell, and the first SSB index is the same as the second SSB index, it is determined that the first SSB index of the third cell does not match the second SSB index of the first cell.

[0012] Optionally, the method further comprises: Sending second indication information to the second network device, the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or instructing the second network device to switch the terminal to a fourth cell corresponding to the third network device.

[0013] Optionally, the method further comprises: When the terminal is not located within the coverage of the first cell, third indication information is sent to the second network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

[0014] In a second aspect, an embodiment of the present invention further provides a cell switching method, which is applied to a second network device, and the method includes: Sending a handover request to the first network device, the handover request being used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first SSB index of a third cell measured by the terminal; A handover response message is received from the first network device, where the handover response message is used to indicate that the first network device allows the terminal to be handed over to the first cell.

[0015] Optionally, the method further comprises: Receive the location information of the terminal sent by the terminal and the first SSB index of the third cell measured by the terminal.

[0016] Optionally, the method further comprises: Receive second indication information sent by the first network device, where the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or to instruct the second network device to switch the terminal to a fourth cell corresponding to the third network device.

[0017] Optionally, the method further comprises: Receive third indication information sent by the first network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

[0018] In a third aspect, an embodiment of the present invention further provides a cell switching method, applied to a terminal, the method comprising: Sending the location information of the terminal and a first SSB index of a third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0019] Optionally, the method further comprises: receiving a random access response MSG2 sent by a first network device in all beam directions of a first cell corresponding to the first network device; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0020] Optionally, the method further comprises: Receive first data information at a PDSCH resource position corresponding to each beam direction of a first cell corresponding to the first network device, where the first data information includes a random access response MSG2 and an SSB index corresponding to the beam; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is the beam through which the terminal receives the first data information.

[0021] Optionally, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different.

[0022] In a fourth aspect, an embodiment of the present invention further provides a cell switching device, the device comprising: A first receiving module is configured to receive a handover request sent by a second network device, wherein the handover request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal; The first sending module is used to send a switching response message to the second network device when it is determined that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell according to the location information, and the first SSB index of the third cell matches the second SSB index of the first cell; the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0023] In a fifth aspect, an embodiment of the present invention further provides a cell switching device, the device comprising: A second sending module is used to send a handover request to the first network device, wherein the handover request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first SSB index of a third cell measured by the terminal; The second receiving module is used to receive a switching response message sent by the first network device, where the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0024] In a sixth aspect, an embodiment of the present invention further provides a cell switching device, the device comprising: A third sending module, configured to send the location information of the terminal and a first SSB index of a third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0025] In the seventh aspect, an embodiment of the present invention also provides a network device, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the cell switching method as described in any one of the first aspect are implemented, or the steps of the cell switching method as described in any one of the second aspect are implemented.

[0026] In the eighth aspect, an embodiment of the present invention further provides a terminal, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps in the cell switching method described in any one of the third aspects are implemented.

[0027] In the ninth aspect, an embodiment of the present invention further provides a readable storage medium, on which a program is stored, and when the program is executed by a processor, the steps of the cell switching method as described in any one of the first aspect are implemented, or the steps of the cell switching method as described in any one of the second aspect are implemented, or the steps of the cell switching method as described in any one of the third aspect are implemented.

[0028] In the tenth aspect, an embodiment of the present invention further provides a computer program product, comprising computer instructions, which, when executed by a processor, implement the steps of the cell switching method as described in any one of the first aspect, or implement the steps of the cell switching method as described in any one of the second aspect, or implement the steps of the cell switching method as described in any one of the third aspect.

[0029] The beneficial effects of the present invention are: The cell switching method provided by the scheme of the present invention, the first network device receives the switching request sent by the second network device, the switching request is used to request the terminal in the second cell corresponding to the second network device to access the first cell corresponding to the first network device, wherein the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal, the second network device determines whether the terminal is in the beam coverage range of the second SSB index of the first cell according to the location information, if the terminal is in the beam coverage range of the second SSB index of the first cell, it determines whether the first SSB index of the third cell measured by the terminal matches the second SSB index of the first cell (or whether confusion occurs), if it is determined that they match each other (no confusion occurs), then a switching response message is sent to the second network device to start a normal switching process. The present invention estimates the second SSB index of the terminal in the first cell through the location information of the terminal, and performs a subsequent switching process while ensuring that the first SSB index of the third cell measured by the terminal matches the second SSB index of the terminal in the first cell, to ensure that the beam direction of the terminal matches that of the target cell, thereby avoiding the problem of switching failure caused by the mismatch between the beam direction of the terminal and the target cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flowchart showing a cell switching method applied to a first network device provided in an embodiment of the present invention; Figure 2 A specific flow chart showing a cell switching method provided by an embodiment of the present invention; Figure 3 A flowchart showing a cell switching method applied to a second network device provided by an embodiment of the present invention; Figure 4 A flowchart showing a cell switching method applied to a terminal provided in an embodiment of the present invention; Figure 5 A schematic diagram showing a structure of a cell switching device provided in an embodiment of the present invention; Figure 6 A second structural schematic diagram showing a cell switching device provided in an embodiment of the present invention; Figure 7 A third structural diagram showing a cell switching device provided in an embodiment of the present invention; Figure 8 A schematic diagram showing the structure of a network device provided by an embodiment of the present invention; Fig. 9 A schematic diagram showing the structure of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and advantages to be solved by the application clearer, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the application. In addition, for clarity and brevity, the description of known functions and structures has been omitted.

[0032] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0033] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0034] In the embodiments provided in the present application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, but B can also be determined according to A and / or other information.

[0035] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: 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.

[0036] Before describing the specific implementation of the present invention, the problem of SSB index confusion caused by PCI confusion of a cell is described as follows: (1) Each cell broadcasts 5 SSBs; (2) The terminal finds through measurement that the beam corresponding to SSB2 of cell A is the best (optimal SSB2). However, for the terminal, the downlink beam pair has been formed (the base station sends beam SSB2 and the terminal receives beam), but the base station does not know the information of this beam pair.

[0037] (3) The terminal receives the beam in the direction of the most appropriate SSB2, and in turn sends PRACH in this direction. It selects PRACH or preamble resources based on the association between PRACH and SSB index. When the base station receives PRACH or preamble, it will infer that the beam in the downlink SSB 2 direction is the best downlink beam for the terminal based on the mapping relationship. All subsequent downlink transmissions to the terminal are performed in the beam direction of SSB2.

[0038] (4) However, it may happen that the terminal reports SSB 2 of cell A, but the base station sends information in the beam direction of SSB 2 of cell B, resulting in the terminal being unable to receive downlink data in the beam direction of SSB 2 of cell B. This is because the PCI confusion of the cell leads to SSB index confusion, causing the terminal's random access process to fail.

[0039] In order to solve the problem of switching failure caused by the inconsistency between the SSB index of the cell measured by the terminal and the SSB index of the target cell in the existing cell switching process, the embodiments of the present invention provide a cell switching method, device, network equipment, terminal, storage medium and product.

[0040] like Figure 1 As shown, an embodiment of the present invention provides a cell switching method, which is applied to a first network device, and the method includes: Step 101: Receive a switching request sent by a second network device, wherein the switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the switching request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal.

[0041] It should be noted that the cell switching method applied to the first network device provided in the embodiment of the present invention can be understood as being executed by the first cell corresponding to the first network device. The steps executed by the second network device can also be understood as being executed by the second cell corresponding to the second network device.

[0042] The second network device may also be referred to as a source base station, the second cell may be referred to as a source cell, the first network device may also be referred to as a target base station, and the first cell may be referred to as a target cell.

[0043] In this step, the source cell sends a handover request to the target cell, the handover request is used to request the terminal in the source cell to access the target cell, and the handover request carries the location information sent by the terminal. The target cell receives the handover request.

[0044] The location information of the terminal includes at least one of the following: the longitude of the terminal, the latitude of the terminal, and the altitude of the terminal.

[0045] And, before this step, the terminal receives the measurement and control information sent by the source cell, obtains the first SSB index of the measured third cell, and in the measurement report, the terminal reports the first SSB index of the measured third cell to the source cell.

[0046] In this step, the source cell carries the first SSB index of the third cell in the above-mentioned handover request and sends it to the target cell.

[0047] Step 102: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell matches the second SSB index of the first cell, sending a handover response message to the second network device; The handover response message is used to indicate that the first network device allows the terminal to be handed over to the first cell.

[0048] The handover response message includes PDSCH resource information.

[0049] In this step, the target cell determines whether the terminal is located within the beam coverage corresponding to the second SSB index of the first cell based on the location information of the terminal. If the terminal is determined to be located within the beam coverage corresponding to the second SSB index of the first cell, then the target cell determines whether the first SSB index of the third cell measured by the terminal matches the second SSB index of the first cell (or whether confusion occurs). If they match (i.e., no confusion occurs), a handover response message is sent to the second network device, indicating that the terminal is allowed to access the first cell and perform a normal handover process. The source cell receives the handover response message.

[0050] Among them, judging whether the terminal is located in the beam coverage range corresponding to the second SSB index of the first cell according to the location information specifically includes: the target cell judging whether the terminal is located in the coverage range of the target cell according to the location information of the terminal; if it is judged that the terminal is located in the coverage range of the target cell, determining or estimating whether the terminal is in the beam coverage range of the second SSB index of the target cell according to the location information of the terminal.

[0051] In an embodiment of the present invention, the second SSB index of the terminal in the first cell is estimated through the location information of the terminal, and a subsequent switching process is performed while ensuring that the first SSB index of the third cell measured by the terminal matches the second SSB index of the first cell of the terminal, thereby ensuring that the beam directions of the terminal and the target base station match, thereby avoiding the problem of switching failure caused by the mismatch between the beam directions of the terminal and the target base station.

[0052] Wherein, the method further comprises: When the physical cell identifier (PCI) of the third cell is the same as the PCI of the first cell, and the first SSB index is the same as the second SSB index, it is determined that the first SSB index of the third cell does not match the second SSB index of the first cell, that is, the first SSB index of the third cell is confused with the second SSB index of the first cell, or a beam misalignment problem occurs in the target cell.

[0053] In an optional embodiment, the method further includes: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, a random access response MSG2 is sent to the terminal in all beam directions of the first cell. That is, when the target cell determines that the location information of the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from that of the first cell, resulting in SSB index confusion, a random access response MSG2 is sent in the omnidirectional direction of the beam (i.e., all beam directions) so that the terminal receives MSG2. Alternatively, it can be understood as using beam bundling to send MSG2 in all beam directions within one PDSCH resource.

[0054] The terminal sends a radio link control (RRC) reconfiguration completion message to the target cell to synchronize with the target cell.

[0055] The target cell receives the RRC reconfiguration completion message sent by the terminal, and the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0056] In another optional embodiment, the method further includes: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, first data information is sent in sequence at the physical downlink shared channel PDSCH resource position corresponding to each beam of the first cell, and the first data information includes a random access response MSG2 and the SSB index corresponding to the beam. That is, when the target cell determines that the location information of the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from the PCI of the first cell, resulting in SSB index confusion, Beam bundling PDSCH is sent, and the PDSCH data corresponding to each beam (i.e., the first data information) is sent in sequence or polling on a continuous logical resource. For example, if there are 7 beams, 7 copies of PDSCH data are sent in sequence or polling, and the first data information includes MSG2 and the SSB index corresponding to the beam sending the first data information. It can be understood that in the first data information of the reconfigured downlink, the newly added information indicates or represents the SSB Index corresponding to the transmitted beam.

[0057] The terminal receives the full amount of the first data information, and the first data information sent by the beam corresponding to the terminal direction will be correctly received and demodulated by the terminal, and the first data information in other beam directions will be discarded by the terminal.

[0058] The terminal sends an RRC reconfiguration completion message to the target cell, and the target cell receives the RRC reconfiguration completion message sent by the terminal. The RRC reconfiguration completion message includes the SSB index of the first beam in the first cell, wherein the first beam is the beam in which the terminal receives the first data information, and both parties reach an agreement.

[0059] Before sending the first data information in sequence at the physical downlink shared channel PDSCH resource position corresponding to each beam of the first cell, the method further includes: Send first indication information to the second network device, where the first indication information is used to indicate a PDSCH resource position corresponding to each beam of the first cell.

[0060] That is, when the target cell determines that the terminal's location information is within the beam coverage range corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from that of the first cell, resulting in SSB index confusion, after the target cell normally restores the switching response information to the source cell, it sends the first indication information (the PDCCH indication) to the source cell to indicate the location of the PDSCH resources.

[0061] Among them, the pre-coding matrix indications (PMI) applicable to the first data information corresponding to different beams in the first cell are different, and respectively correspond to the beamforming arrays of the SSBs corresponding to the beams sending the first data information.

[0062] In an optional embodiment, the method further includes: Sending second indication information to the second network device, the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or instructing the second network device to switch the terminal to a fourth cell corresponding to the third network device.

[0063] That is, in this optional embodiment, when the target cell determines that the location information of the terminal is within the beam coverage range corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from the PCI of the first cell, resulting in SSB index confusion, a second indication information is sent to the source cell, and the second indication information is used to indicate the beam misalignment of the target cell, and / or to instruct the source cell to replace other cells as the target cell.

[0064] In an optional embodiment, the method further includes: When the terminal is not located within the coverage of the first cell, third indication information is sent to the second network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

[0065] That is, in this optional embodiment, the target cell determines whether the terminal is located within the coverage of the target cell based on the location information of the terminal. If it is not within the coverage of the target cell, it determines that the target cell has an out-of-zone coverage problem, and sends a third indication message to the source cell. Optionally, the third indication message may be carried in the switching response message. The third indication message is used to indicate that the target cell has an out-of-zone coverage problem. The source cell replaces other cells as the target cell based on the third indication message.

[0066] Combine the following Figure 2 , specifically describe the specific process of the cell switching method provided by the embodiment of the present invention: The terminal receives the measurement and control information of the source cell; the terminal measures the first SSB index of the third cell (the cell reported by the terminal) according to the measurement and control information, and reports the first SSB index of the third cell and the location information of the terminal to the source cell; the source cell sends a handover request to the target cell, and the handover request includes the location information of the terminal and the first SSBindex of the third cell; the target cell determines whether the SSB index is correct according to the location information of the terminal, that is, the target cell estimates that the terminal is within the beam coverage of the second SSB index of the first cell according to the location information of the terminal, and determines whether the first SSB index of the third cell matches the second SSB index of the first cell. If they do not match, it is decided to send MSG2 omnidirectionally or to send MSG2 in polling; the source cell sends configuration information to the terminal; the terminal carries the received PDSCH position in the RRC reconfiguration completion message; the target cell sends MSG2 omnidirectionally or to send MSG2 in polling to the terminal; the source cell carries the received PDSCH resource information in the RRC reconfiguration completion message; the target cell sends MSG2 omnidirectionally or to send MSG2 in polling to the terminal to obtain the position of the beam of the correct SBB index where the terminal is located, and starts communicating with the target cell.

[0067] In summary, in an embodiment of the present invention, in order to solve the problem of SSB index confusion caused by PCI confusion of a cell in a low-altitude scenario, the terminal reports location information and the measured first SSB index of a third cell, and the target cell estimates that the terminal is at the second SSB index of the first cell according to the location information of the terminal, and according to the first SSB index of the third cell and the second SSB index of the first cell, MSG2 is sent omnidirectionally or polled using beam bundling, and the position of the beam with the correct SBB index of the terminal is obtained in the reconfiguration completion message, and the SSB index is confirmed bidirectionally, so that the user can correctly access the cell and correct the SSB index, thereby solving the switching failure problem caused by the mismatch between the terminal and the target base station direction.

[0068] like Figure 3 As shown, an embodiment of the present invention further provides a cell switching method, which is applied to a second network device, and the method includes: Step 301: Send a switching request to the first network device, wherein the switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the switching request includes location information of the terminal and a first SSB index of a third cell measured by the terminal.

[0069] It should be noted that the cell switching method applied to the second network device provided in the embodiment of the present invention can be understood as being executed by the second cell corresponding to the second network device. The steps executed by the first network device can also be understood as being executed by the first cell corresponding to the first network device.

[0070] The second network device may also be referred to as a source base station, the second cell may be referred to as a source cell, the first network device may also be referred to as a target base station, and the first cell may be referred to as a target cell.

[0071] In this step, the source cell sends a handover request to the target cell, the handover request is used to request the terminal in the source cell to access the target cell, and the handover request carries the location information sent by the terminal. The target cell receives the handover request.

[0072] The location information of the terminal includes at least one of the following: the longitude of the terminal, the latitude of the terminal, and the altitude of the terminal.

[0073] In this step, the source cell carries the first SSB index of the third cell in the above-mentioned handover request and sends it to the target cell.

[0074] Step 302: Receive a handover response message sent by the first network device, where the handover response message is used to indicate that the first network device allows the terminal to be handed over to the first cell.

[0075] The handover response message includes PDSCH resource information.

[0076] In this step, the target cell determines whether the terminal is located within the beam coverage corresponding to the second SSB index of the first cell based on the location information of the terminal. If the terminal is determined to be located within the beam coverage corresponding to the second SSB index of the first cell, then the target cell determines whether the first SSB index of the third cell measured by the terminal matches the second SSB index of the first cell (or whether confusion occurs). If they match (i.e., no confusion occurs), a handover response message is sent to the second network device, indicating that the terminal is allowed to access the first cell and perform a normal handover process. The source cell receives the handover response message.

[0077] In an optional embodiment, before sending the switching request to the first network device, the method further includes: Receive the location information of the terminal sent by the terminal and the first SSB index of the third cell measured by the terminal.

[0078] That is, in this optional embodiment, the terminal receives the measurement and control information sent by the source cell, obtains the first SSB index of the measured third cell, and in the measurement report, the terminal reports the first SSB index of the measured third cell to the source cell, and the source cell receives the first SSB index of the third cell.

[0079] And, the terminal sends the location information of the terminal to the source cell, and the source cell receives the location information of the terminal reported by the terminal.

[0080] In an optional embodiment, the method further includes: Receive second indication information sent by the first network device, where the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or to instruct the second network device to switch the terminal to a fourth cell corresponding to the third network device.

[0081] That is, in this optional embodiment, when the target cell determines that the location information of the terminal is within the beam coverage range corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from the PCI of the first cell, resulting in SSB index confusion, a second indication information is sent to the source cell, and the second indication information is used to indicate the beam misalignment of the target cell, and / or to instruct the source cell to replace other cells as the target cell.

[0082] The source cell receives the second indication information and may replace other cells as the target cell according to the second indication information.

[0083] In an optional embodiment, the method further includes: Receive third indication information sent by the first network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

[0084] That is, in this optional embodiment, the target cell determines whether the terminal is located within the coverage of the target cell based on the location information of the terminal. If it is not within the coverage of the target cell, it determines that the target cell has an out-of-zone coverage problem, and sends a third indication message to the source cell. Optionally, the third indication message may be carried in the switching response message. The third indication message is used to indicate that the target cell has an out-of-zone coverage problem. The source cell replaces other cells as the target cell based on the third indication message.

[0085] The source cell receives the third indication information and may select another cell as the target cell according to the third indication information.

[0086] It should be noted that all embodiments of the cell switching method applied to the second network device provided in the embodiments of the present invention are applicable to all embodiments of the cell switching method applied to the first network device mentioned above, and can achieve the same or similar technical effects.

[0087] like Figure 4 As shown, an embodiment of the present invention further provides a cell switching method, which is applied to a terminal, and the method includes: Step 401: Sending the location information of the terminal and the first SSB index of the third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0088] It should be noted that, in the embodiment of the present invention, the steps performed by the second network device may also be understood to be performed by the second cell corresponding to the second network device.

[0089] The second network device may also be referred to as a source base station, and the second cell may be referred to as a source cell.

[0090] In this step, the terminal receives the measurement and control information sent by the source cell, obtains the first SSB index of the measured third cell, and in the measurement report, the terminal reports the first SSB index of the measured third cell to the source cell.

[0091] And, the terminal reports the location information of the terminal to the source cell.

[0092] In an optional embodiment, the method further includes: receiving a random access response MSG2 sent by a first network device in all beam directions of a first cell corresponding to the first network device; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0093] That is, when the target cell determines that the terminal's location information is within the beam coverage corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from that of the first cell, resulting in SSB index confusion, the random access response MSG2 is sent in the omnidirectional direction of the beam (i.e., all beam directions) so that the terminal receives MSG2. Alternatively, it can be understood as using beam bundling to send MSG2 in all beam directions within one PDSCH resource.

[0094] The terminal receives MSG2, sends a radio link control (RRC) reconfiguration completion message to the target cell, and synchronizes with the target cell, wherein the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0095] In another optional embodiment, the method further includes: Receive first data information at a PDSCH resource position corresponding to each beam direction of a first cell corresponding to the first network device, where the first data information includes a random access response MSG2 and an SSB index corresponding to the beam; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is the beam through which the terminal receives the first data information.

[0096] That is, when the target cell determines that the location information of the terminal is within the coverage of the beam corresponding to the second SSB index of the first cell, but the PCI of the third cell is different from that of the first cell, resulting in SSB index confusion, a Beam bundling PDSCH is sent, and the PDSCH data corresponding to each beam (i.e., the first data information) is sent in sequence or in polling on a continuous logical resource. For example, if there are 7 beams, 7 copies of PDSCH data are sent in sequence or in polling, and the first data information includes MSG2 and the SSB index corresponding to the beam sending the first data information. It can be understood that in the first data information of the reconfigured downlink, the newly added information indicates or represents the SSB Index corresponding to the transmitted beam.

[0097] The terminal receives the full amount of the first data information, and the first data information sent by the beam corresponding to the terminal direction will be correctly received and demodulated by the terminal, and the first data information in other beam directions will be discarded by the terminal.

[0098] The terminal sends an RRC reconfiguration completion message to the target cell, and the target cell receives the RRC reconfiguration completion message sent by the terminal. The RRC reconfiguration completion message includes the SSB index of the first beam in the first cell, wherein the first beam is the beam in which the terminal receives the first data information, and both parties reach an agreement.

[0099] Among them, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different, and corresponds to the beamforming array of the SSB corresponding to the beam sending the first data information.

[0100] It should be noted that all embodiments of the cell switching method applied to the terminal provided in the embodiments of the present invention are applicable to all embodiments of the cell switching method applied to the first network device or the second network device mentioned above, and can achieve the same or similar technical effects.

[0101] like Figure 5 As shown, an embodiment of the present invention further provides a cell switching device, the device comprising: The first receiving module 501 is used to receive a handover request sent by a second network device, wherein the handover request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal; The first sending module 502 is used to send a switching response message to the second network device when it is determined that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell according to the location information, and the first SSB index of the third cell matches the second SSB index of the first cell; the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0102] Optionally, the device further comprises: A first information sending module, configured to send a random access response MSG2 to the terminal in all beam directions of the first cell when it is determined that the terminal is located in a beam coverage range corresponding to the second SSB index of the first cell according to the location information, and the first SSB index of the third cell does not match the second SSB index of the first cell; The first information receiving module is used to receive a radio link control RRC reconfiguration completion message sent by the terminal, wherein the RRC reconfiguration completion message includes an SSB index of a beam of the random access response MSG2 received by the terminal.

[0103] Optionally, the device further comprises: A second information sending module is used to send first data information in sequence at a physical downlink shared channel PDSCH resource position corresponding to each beam of the first cell, when it is determined according to the location information that the terminal is located in a beam coverage range corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, wherein the first data information includes a random access response MSG2 and an SSB index corresponding to the beam; The second information receiving module is used to receive an RRC reconfiguration completion message sent by the terminal, wherein the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is the beam through which the terminal receives the first data information.

[0104] Optionally, the device further comprises: The third information sending module is used to send first indication information to the second network device, where the first indication information is used to indicate the PDSCH resource position corresponding to each beam of the first cell.

[0105] Optionally, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different.

[0106] Optionally, the device further comprises: The first processing module is used to determine that the first SSB index of the third cell does not match the second SSB index of the first cell when the physical cell identifier PCI of the third cell is the same as the PCI of the first cell and the first SSB index is the same as the second SSB index.

[0107] Optionally, the device further comprises: The fourth information sending module is used to send second indication information to the second network device, wherein the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or to instruct the second network device to switch the terminal to the fourth cell corresponding to the third network device.

[0108] Optionally, the device further comprises: The fifth information sending module is used to send third indication information to the second network device when the terminal is not located within the coverage area of ​​the first cell, wherein the third indication information is used to indicate that the terminal is not located within the coverage area of ​​the first cell.

[0109] It should be noted that the cell switching device provided in the embodiment of the present invention is a device capable of executing the above-mentioned cell switching method applied to the first network device. All embodiments of the above-mentioned cell switching method applied to the first network device are applicable to the device and can achieve the same or similar technical effects.

[0110] like Figure 6 As shown, an embodiment of the present invention further provides a cell switching device, the device comprising: The second sending module 601 is used to send a handover request to the first network device, where the handover request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first SSB index of a third cell measured by the terminal; The second receiving module 602 is configured to receive a handover response message sent by the first network device, where the handover response message is used to indicate that the first network device allows the terminal to be handed over to the first cell.

[0111] Optionally, the device further comprises: The third information receiving module is used to receive the location information of the terminal sent by the terminal and the first SSB index of the third cell measured by the terminal.

[0112] Optionally, the device further comprises: The fourth information receiving module is used to receive the second indication information sent by the first network device, wherein the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or to instruct the second network device to switch the terminal to the fourth cell corresponding to the third network device.

[0113] Optionally, the method further comprises: The fifth information receiving module is used to receive third indication information sent by the first network device, where the third indication information is used to indicate that the terminal is not within the coverage of the first cell.

[0114] It should be noted that the cell switching device provided in the embodiment of the present invention is a device capable of executing the above-mentioned cell switching method applied to the second network device. All embodiments of the above-mentioned cell switching method applied to the second network device are applicable to the device and can achieve the same or similar technical effects.

[0115] like Figure 7 As shown, an embodiment of the present invention further provides a cell switching device, the device comprising: The third sending module 701 is used to send the location information of the terminal and the first SSB index of the third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0116] Optionally, the device further comprises: A sixth information receiving module, configured to receive a random access response MSG2 sent by the first network device in all beam directions of the first cell corresponding to the first network device; The sixth information sending module is used to send an RRC reconfiguration completion message to the first network device, and the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0117] Optionally, the device further comprises: A seventh information receiving module, configured to receive first data information at a PDSCH resource position corresponding to each beam direction of a first cell corresponding to a first network device, wherein the first data information includes a random access response MSG2 and an SSB index corresponding to the beam; The seventh information sending module is used to send an RRC reconfiguration completion message to the first network device, and the RRC reconfiguration completion message includes the SSB index of the first beam in the first cell, wherein the first beam is the beam through which the terminal receives the first data information.

[0118] Optionally, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different.

[0119] It should be noted that the cell switching device provided in the embodiment of the present invention is a device capable of executing the above-mentioned cell switching method applied to the terminal. All embodiments of the above-mentioned cell switching method applied to the terminal are applicable to the device and can achieve the same or similar technical effects.

[0120] like Figure 8 As shown, an embodiment of the present invention further provides a network device, which is a first network device, comprising: a processor 801; and a memory 803 connected to the processor 801 via a bus interface 802, wherein the memory 803 is used to store programs and data used by the processor 801 when performing operations, and the processor 801 calls and executes the programs and data stored in the memory 803.

[0121] The transceiver 804 is connected to the bus interface 802 and is used to receive and send data under the control of the processor 801. Specifically, the processor 801 is used to read the program in the memory 803, and the transceiver 804 is used to perform the following process: receiving a handover request sent by a second network device, the handover request being used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal; When it is determined based on the location information that the terminal is located in the beam coverage range corresponding to the second SSB index of the first cell, and the first SSB index of the third cell matches the second SSB index of the first cell, a switching response message is sent to the second network device; the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0122] Optionally, the transceiver 804 is further configured to: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, sending a random access response MSG2 to the terminal in all beam directions of the first cell; Receive a radio link control RRC reconfiguration completion message sent by the terminal, where the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0123] Optionally, the transceiver 804 is further configured to: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, first data information is sent in sequence at the physical downlink shared channel PDSCH resource position corresponding to each beam of the first cell, where the first data information includes a random access response MSG2 and the SSB index corresponding to the beam; Receive an RRC reconfiguration completion message sent by the terminal, where the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is a beam through which the terminal receives the first data information.

[0124] Optionally, the transceiver 804 is further configured to: Send first indication information to the second network device, where the first indication information is used to indicate a PDSCH resource position corresponding to each beam of the first cell.

[0125] Optionally, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different.

[0126] Optionally, the processor 801 is configured to: When the physical cell identifier PCI of the third cell is the same as the PCI of the first cell, and the first SSB index is the same as the second SSB index, it is determined that the first SSB index of the third cell does not match the second SSB index of the first cell.

[0127] Optionally, the transceiver 804 is further configured to: Sending second indication information to the second network device, the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or instructing the second network device to switch the terminal to a fourth cell corresponding to the third network device.

[0128] Optionally, the transceiver 804 is further configured to: When the terminal is not located within the coverage of the first cell, third indication information is sent to the second network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

[0129] Among them, Figure 8 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 801 and memory represented by memory 803. The bus architecture may also link 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 804 may be a plurality of components, i.e., including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 may store data used by the processor 801 when performing operations.

[0130] An embodiment of the present invention also provides a network device, which is a second network device, comprising: a processor; and a memory connected to the processor via a bus interface, the memory being used to store programs and data used by the processor when performing operations, and the processor calling and executing the programs and data stored in the memory.

[0131] The transceiver is connected to the bus interface and is used to receive and send data under the control of the processor.

[0132] It should be noted that the structure of the second network device is similar to Figure 8 The structure of the first network device shown is basically the same and will not be described in detail here.

[0133] Specifically, the processor is used to read the program in the memory, and the transceiver is used to perform the following process: Sending a handover request to the first network device, the handover request being used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first SSB index of a third cell measured by the terminal; A handover response message is received from the first network device, where the handover response message is used to indicate that the first network device allows the terminal to be handed over to the first cell.

[0134] Optionally, the transceiver is further used for: Receive the location information of the terminal sent by the terminal and the first SSB index of the third cell measured by the terminal.

[0135] Optionally, the transceiver is further used for: Receive second indication information sent by the first network device, where the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or to instruct the second network device to switch the terminal to a fourth cell corresponding to the third network device.

[0136] Optionally, the transceiver is further used for: Receive third indication information sent by the first network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

[0137] like Fig. 9 As shown, an embodiment of the present invention also provides a terminal, including: a processor 901; and a memory 903 connected to the processor 901 through a bus interface 902, the memory 903 is used to store programs and data used by the processor 901 when performing operations, and the processor 901 calls and executes the programs and data stored in the memory 903.

[0138] The transceiver 904 is connected to the bus interface 902 and is used to receive and send data under the control of the processor 901. Specifically, the processor 901 is used to read the program in the memory 903, and the transceiver 904 is used to perform the following process: Sending the location information of the terminal and a first SSB index of a third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

[0139] Optionally, the transceiver 904 is further configured to: receiving a random access response MSG2 sent by a first network device in all beam directions of a first cell corresponding to the first network device; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

[0140] Optionally, the transceiver 904 is further configured to: Receive first data information at a PDSCH resource position corresponding to each beam direction of a first cell corresponding to the first network device, where the first data information includes a random access response MSG2 and an SSB index corresponding to the beam; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is the beam through which the terminal receives the first data information.

[0141] Optionally, the precoding matrix indication PMI applicable to the first data information corresponding to different beams in the first cell is different.

[0142] 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 901 and memory represented by memory 903. 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 a user interface 905. The transceiver 904 may be a plurality of components, i.e., including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 901 is responsible for managing the bus architecture and general processing, and the memory 903 may store data used by the processor 901 when performing operations.

[0143] In addition, a specific embodiment of the present invention further provides a readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the steps of the cell switching method applied to the first network device as described in any one of the above are implemented, or the steps of the cell switching method applied to the second network device as described in any one of the above are implemented, or the steps of the cell switching method applied to the terminal as described in any one of the above are implemented.

[0144] In the several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0145] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0146] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the resource selection method described in each embodiment of the present invention, or to perform some steps of the information sending method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0147] A specific embodiment of the present invention further provides a computer program product, including computer instructions, which, when executed by a processor, implement the above Figure 1 or Figure 3 or Figure 4 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0148] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A cell switching method, characterized in that: Applied to a first network device, the method comprises: receiving a handover request sent by a second network device, the handover request being used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal; When it is determined based on the location information that the terminal is located in the beam coverage range corresponding to the second SSB index of the first cell, and the first SSB index of the third cell matches the second SSB index of the first cell, a switching response message is sent to the second network device; the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

2. The method according to claim 1, characterized in that The method further comprises: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, sending a random access response MSG2 to the terminal in all beam directions of the first cell; Receive a radio link control RRC reconfiguration completion message sent by the terminal, where the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

3. The method according to claim 1, characterized in that The method further comprises: When it is determined according to the location information that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell, and the first SSB index of the third cell does not match the second SSB index of the first cell, first data information is sent in sequence at the physical downlink shared channel PDSCH resource position corresponding to each beam of the first cell, where the first data information includes a random access response MSG2 and the SSB index corresponding to the beam; Receive an RRC reconfiguration completion message sent by the terminal, where the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is a beam through which the terminal receives the first data information.

4. The method according to claim 3, characterized in that The method further comprises: Send first indication information to the second network device, where the first indication information is used to indicate a PDSCH resource position corresponding to each beam of the first cell.

5. The method according to claim 3, characterized in that: The first data information corresponding to different beams in the first cell is applicable to different precoding matrix indications PMIs.

6. The method according to any one of claims 1 to 3, characterized in that The method further comprises: When the physical cell identifier PCI of the third cell is the same as the PCI of the first cell, and the first SSB index is the same as the second SSB index, it is determined that the first SSB index of the third cell does not match the second SSB index of the first cell.

7. The method according to claim 2, characterized in that: The method further comprises: Sending second indication information to the second network device, the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or instructing the second network device to switch the terminal to a fourth cell corresponding to the third network device.

8. The method according to claim 1, characterized in that: The method further comprises: When the terminal is not located within the coverage of the first cell, third indication information is sent to the second network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

9. A cell switching method, characterized in that: Applied to the second network device, the method comprises: Sending a handover request to the first network device, the handover request being used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first SSB index of a third cell measured by the terminal; A handover response message is received from the first network device, where the handover response message is used to indicate that the first network device allows the terminal to be handed over to the first cell.

10. The method according to claim 9, characterized in that The method further comprises: Receive the location information of the terminal sent by the terminal and the first SSB index of the third cell measured by the terminal.

11. The method according to claim 9, characterized in that The method further comprises: Receive second indication information sent by the first network device, where the second indication information is used to indicate that the first SSB index of the third cell does not match the second SSB index of the first cell, and / or to instruct the second network device to switch the terminal to a fourth cell corresponding to the third network device.

12. The method according to claim 9, characterized in that The method further comprises: Receive third indication information sent by the first network device, where the third indication information is used to indicate that the terminal is not located within the coverage of the first cell.

13. A cell switching method, characterized in that: Applied to a terminal, the method comprises: Sending the location information of the terminal and a first SSB index of a third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

14. The method according to claim 13, characterized in that The method further comprises: receiving a random access response MSG2 sent by a first network device in all beam directions of a first cell corresponding to the first network device; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes the SSB index of the beam of the random access response MSG2 received by the terminal.

15. The method according to claim 13, characterized in that The method further comprises: Receive first data information at a PDSCH resource position corresponding to each beam direction of a first cell corresponding to the first network device, where the first data information includes a random access response MSG2 and an SSB index corresponding to the beam; An RRC reconfiguration completion message is sent to the first network device, wherein the RRC reconfiguration completion message includes an SSB index of a first beam in a first cell, wherein the first beam is the beam through which the terminal receives the first data information.

16. The method according to claim 15, characterized in that The first data information corresponding to different beams in the first cell is applicable to different precoding matrix indications PMIs.

17. A cell switching device, characterized in that: The device comprises: A first receiving module is configured to receive a handover request sent by a second network device, wherein the handover request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first synchronization signal block / physical broadcast channel block SSB index of a third cell measured by the terminal; The first sending module is used to send a switching response message to the second network device when it is determined that the terminal is located in the beam coverage corresponding to the second SSB index of the first cell according to the location information, and the first SSB index of the third cell matches the second SSB index of the first cell; the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

18. A cell switching device, characterized in that: The device comprises: A second sending module is used to send a handover request to the first network device, wherein the handover request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; wherein the handover request includes location information of the terminal and a first SSB index of a third cell measured by the terminal; The second receiving module is used to receive a switching response message sent by the first network device, where the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

19. A cell switching device, characterized in that: The device comprises: A third sending module, used to send the location information of the terminal and the first SSB index of the third cell measured by the terminal to the second network device; The second network device is used to send a switching request to the first network device, and receive a switching response message sent by the first network device; The switching request is used to request a terminal in a second cell corresponding to the second network device to access a first cell corresponding to the first network device; the switching request includes the location information of the terminal and the first SSB index of the third cell measured by the terminal; and the switching response message is used to indicate that the first network device allows the terminal to be switched to the first cell.

20. A network device, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the program implements the steps of the cell switching method according to any one of claims 1 to 8, or implements the steps of the cell switching method according to any one of claims 9 to 12.

21. A terminal, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps in the cell switching method according to any one of claims 13 to 16 are implemented.

22. A readable storage medium, characterized in that: The readable storage medium stores a program, and when the program is executed by the processor, it implements the steps in the cell switching method as described in any one of claims 1 to 8, or implements the steps in the cell switching method as described in any one of claims 9 to 12, or implements the steps in the cell switching method as described in any one of claims 13 to 16.

23. A computer program product, characterized in that The method comprises computer instructions, which, when executed by a processor, implement the steps in the cell switching method according to any one of claims 1 to 8, or implement the steps in the cell switching method according to any one of claims 9 to 12, or implement the steps in the cell switching method according to any one of claims 13 to 16.

Images