A communication method and apparatus

Abstract

The application discloses a communication method and device, which are applied to the technical field of communication. In the method, a source network device of a terminal device performing switching indicates a first cell to be accessed by the terminal device and a first beam used for accessing the first cell through first information, so that a target network device of the terminal device performing switching reserves access resources for the terminal device according to the first cell and the first beam, for example, reserves the first beam used for accessing the first cell, thereby facilitating the terminal device to directly access the first cell by using the reserved access resources, reducing access failure caused by the fact that the terminal device cannot access the first cell by using the access resources, and improving the success rate of the terminal device accessing the first cell.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] Terminals move continuously during communication. This movement can degrade the signal quality in the current serving cell, potentially leading to a switch to a target cell. Improving the success rate of terminal access to the target cell is a problem that needs to be addressed. Summary of the Invention

[0003] This application provides a communication method and apparatus that can help improve the success rate of terminal devices accessing target cells.

[0004] Firstly, embodiments of this application provide a communication method, which can be executed by a first network device. Here, the first network device can refer to the first network device itself, or to a processor, module, chip, or chip system that is equivalent to the first network device and implements the method. The first network device is the source network device for which the terminal device performs a handover, and the second network device is the target network device for which the terminal device performs a handover. For ease of explanation, the first network device is described as the source network device, and the second network device as the target network device.

[0005] The method includes: a first network device sending first information, the first information being used to indicate a first cell to be accessed by a terminal device and a first beam for accessing the first cell, the first cell being a cell corresponding to a second network device.

[0006] As can be seen, in this method, the source network device indicates the target cell (first cell) to be accessed by the terminal device and the access beam (first beam) used to access the target cell through the first information. This allows the target network device to reserve access resources for the terminal device based on the target cell and the access beam, such as reserving the access beam used to access the target cell. This, in turn, allows the terminal device to directly use the reserved access beam to access the target cell, reducing access failures caused by the terminal device being unable to use the access beam to access the target cell and improving the success rate of the terminal device accessing the target cell.

[0007] Optionally, the first network device sending the first information includes: sending the first information to the second network device.

[0008] In one alternative implementation, the first information is further used to indicate a second beam, which is used by the terminal device to communicate within the first cell.

[0009] Based on the above scheme, the source network device also instructs the terminal device to use the communication beam (second beam) for communication within the target cell through the first information. This is beneficial for the target network device to reserve communication resources for the terminal device based on the communication beam, such as reserving the indicated communication beam. This, in turn, enables the terminal device to directly use the reserved communication beam for communication within the target cell, thereby improving the communication performance of the terminal device within the target cell.

[0010] In one alternative implementation, the first information is further used to indicate the dwell time / dwelling period of the terminal device within the first beam.

[0011] Based on the above scheme, the source network device also instructs the terminal device on the dwell time / dwell time period within the access beam through the first information. This allows the target network device to reserve the access beam in a specific time domain resource in conjunction with the dwell time / dwell time period within the access beam. This can reduce access failures caused by the terminal device being unable to use the access beam to access the target cell in a specific time domain resource, thereby improving the success rate of the terminal device accessing the target cell.

[0012] In another alternative implementation, if the first information also indicates the second beam, the first information is also used to indicate the dwell time / dwelling period of the terminal device within the second beam.

[0013] Based on the above scheme, the source network device also instructs the terminal device on the dwell time / dwelling period within the communication beam through the first information. This allows the target network device to reserve communication resources for the terminal device within a specific time domain, based on the dwell time / dwelling period within the communication beam, thereby improving the communication performance of the terminal device within the target cell.

[0014] In one optional implementation, the first cell corresponds to multiple first beams, and the first information is further used to indicate the access probability or access priority of the multiple first beams. This approach allows the target network device to reserve different access resources based on the access probability or access priority of multiple access beams, thereby improving the success rate of the terminal device accessing the target cell.

[0015] In one optional implementation, the first network device acquires at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information indicating a third beam for the third network device. The first network device acquires at least one of these to determine / predict the first information.

[0016] Based on the above scheme, the first network device can acquire at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating the third beam of the third network device, and determine / predict the first information based on the acquired at least one of the above. Therefore, the first network device can indicate the target cell to which the terminal device needs to access and the access beam used to access the target cell. This facilitates the target network device reserving access resources for the terminal device based on the target cell and the access beam used to access the target cell, thereby enabling the terminal device to directly use the reserved access resources to access the target cell and improving the success rate of the terminal device accessing the target cell.

[0017] Optionally, the first mobility information is used to indicate the movement path of the terminal device before handover to the second network device, such as including the movement path of the terminal device in the cell corresponding to the first network device and the movement path of the terminal device before handover to the first network device. Therefore, the first mobility information can be historical mobility information of the terminal device before handover to the second network device.

[0018] Optionally, the layer 3 beam measurement result is obtained by the terminal device performing layer 3 measurement on the configured beam, and the layer 3 beam prediction result is obtained by the terminal device or the first network device performing beam prediction based on the layer 3 beam measurement result.

[0019] Optionally, the layer 1 beam measurement result is obtained by the terminal device performing layer 1 measurement on the configured beam, and the layer 1 beam prediction result is obtained by the terminal device or the first network device performing beam prediction based on the layer 1 beam measurement result.

[0020] Optionally, the third network device is a network device adjacent to the first network device, and the information used to indicate the third beam includes at least one of the following: the measurement result of the third beam, the prediction result of the third beam, the number of terminal devices connected to the third beam, or the cell coverage information corresponding to the third beam. It can be seen that the information used to indicate the third beam can be the beam information of a network device adjacent to the first network device. For example, when the first network device is the source base station, the information used to indicate the third beam can be the beam information of a neighboring station.

[0021] In another optional implementation, the first network device receives second information from the fourth network device. This second information indicates the Layer 1 beam measurement results and / or Layer 1 beam prediction results. Specifically, the second information is used to determine / predict the first information, which indicates the first cell to which the terminal device needs to access, the first beam used for accessing the first cell, and the second beam used by the terminal device for communication within the first cell. The Layer 1 beam measurement results and Layer 1 beam prediction results are as described above and will not be repeated here.

[0022] Optionally, when the first network device receives the second information, the first network device is a centralized unit of the source network device, and the fourth network device is a distributed unit of the source network device.

[0023] Based on the above scheme, the centralized unit of the source network device can receive second information from the distributed unit of the source network device. This second information is used to determine / predict the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication within the target cell. Therefore, the centralized unit of the source network device can indicate the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication within the target cell. This facilitates the distributed unit corresponding to the target cell in reserving access resources for the terminal device based on the target cell and the access beam, and in reserving communication resources for the terminal device based on the communication beam. This improves the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0024] In one optional implementation, the second information is used to determine / predict the first information in combination with at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information indicating the third beam of the third network device. The first motion information, layer 3 beam measurement results, layer 3 beam prediction results, and information indicating the third beam of the third network device are as described above and will not be repeated here.

[0025] Based on the above scheme, the first network device can determine / predict the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for the terminal device to communicate within the target cell, based on the second information and at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information used to indicate the third beam of the third network device. Thus, the first network device can indicate the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication. This allows the target network device to reserve access and communication resources for the terminal device based on the indicated information, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0026] In another possible embodiment, the first network device receives third information from the fifth network device. This third information indicates at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information about the third beam of the third network device. The third information is used to determine / predict the first information, which in turn indicates the first cell to which the terminal device will access, the first beam used for accessing the first cell, and the second beam used by the terminal device for communication within the first cell. The first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, and information about the third beam of the third network device are as described above and will not be repeated here.

[0027] Optionally, when the first network device receives the third information, the first network device is a distributed unit of the source network device, and the fifth network device is a centralized unit of the source network device.

[0028] Based on the above scheme, the distributed unit of the source network device receives third information from the centralized unit of the source network device. This third information is used to determine / predict the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication within the target cell. Therefore, the distributed unit of the source network device can indicate the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication within the target cell. This benefits the distributed unit corresponding to the target cell by reserving access resources for the terminal device based on the target cell and the access beam, and reserving communication resources for the terminal device based on the communication beam. This improves the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0029] In one optional implementation, the third information is used to determine / predict the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results. The layer 1 beam measurement results and layer 1 beam prediction results are as described above and will not be repeated here.

[0030] Based on the above scheme, the first network device can determine / predict the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for the terminal device to communicate within the target cell, based on the third information and at least one of the following: Layer 1 beam measurement results or Layer 1 beam prediction results. Therefore, the first network device can indicate the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication. This allows the target network device to reserve access and communication resources for the terminal device based on the indicated information, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0031] In another optional embodiment, the first network device receives fourth information from the fifth network device. This fourth information indicates second mobility information, or it indicates information about the second mobility information and the third beam of the third network device. The fourth information is used to determine / predict the first information, and the first information indicates the first cell to which the terminal device needs to access, the first beam for accessing the first cell, and the second beam for the terminal device to communicate in the first cell.

[0032] Optionally, the second mobility information is used to indicate the predicted movement path of the terminal device within the first cell. Therefore, the second mobility information can be the movement information of the terminal device predicted by the fifth network device within the target cell. The information used to indicate the third beam is as described above and will not be repeated here.

[0033] Optionally, when the first network device receives the fourth information, the first network device is a distributed unit of the source network device, and the fifth network device is a centralized unit of the source network device.

[0034] Based on the above scheme, the distributed unit of the source network device receives fourth information from the centralized unit of the source network device. This fourth information is used to determine / predict the target cell to which the terminal device will access, the access beam for accessing the target cell, and the communication beam for communication within the target cell. Therefore, the distributed unit of the source network device can indicate the target cell to which the terminal device will access, the access beam for accessing the target cell, and the communication beam for communication within the target cell. This benefits the distributed unit corresponding to the target cell by reserving access resources for the terminal device based on the target cell and the access beam, and reserving communication resources for the terminal device based on the communication beam. This improves the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0035] In one alternative implementation, the fourth information is used to determine / predict the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0036] Based on the above scheme, the first network device can determine / predict the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for the terminal device to communicate within the target cell, according to the fourth information, as well as the Layer 1 beam measurement results and / or Layer 1 beam prediction results. Thus, the first network device can indicate the target cell to which the terminal device needs to access, the access beam for accessing the target cell, and the communication beam for communication. This allows the target network device to reserve access and communication resources for the terminal device based on the indicated information, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0037] In one optional implementation, the first network device receives fifth information, which indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time / dwelling period of the terminal device within the fourth beam, the dwell time / dwelling period of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell. Wherein, the second cell is the cell corresponding to the second network device.

[0038] Based on the above scheme, the source network device, by receiving the fifth information, obtains at least one of the following after the terminal device switches to the target network device: the target cell accessed, the access beam used to access the target cell, the communication beam used for communication within the target cell accessed, the dwell time / dwelling period within the access beam, the dwell time / dwelling period within the communication beam, or the communication performance indicators of the terminal device within the target cell accessed. This is beneficial for the first network device to monitor and predict performance based on the fifth information, such as monitoring the performance of the model used to predict the first information, so as to optimize the predictive performance of the model.

[0039] In one optional implementation, the first network device further sends a sixth message, which requests to obtain the mobile information of the terminal device in the cell corresponding to the second network device.

[0040] Based on the above method, the first network device can request the sixth information to obtain the actual movement information of the terminal device in the cell served by the target network device after it switches to the target network device, so as to monitor and predict performance based on the actual movement information of the terminal device in the cell served by the target network device.

[0041] Secondly, embodiments of this application also provide a communication method, which can be executed by a second network device. The second network device can refer to the second network device itself, or to a processor, module, chip, or chip system that functions as a second network device to implement the method. The first network device is the source network device for which the terminal device performs switching, and the second network device is the target network device for which the terminal device performs switching. For ease of explanation, the first network device is described as the source network device, and the second network device as the target network device.

[0042] The method includes: a second network device receiving first information, the first information being used to indicate a first cell to be accessed by the terminal device and a first beam for accessing the first cell, the first cell being the cell corresponding to the second network device.

[0043] As can be seen, in this method, the target network device receives the first information to obtain the target cell (first cell) to which the terminal device needs to access and the access beam (first beam) used to access the target cell. Thus, it can reserve access resources for the terminal device based on the target cell and the access beam, such as reserving the access beam used to access the target cell. This is beneficial for the terminal device to directly use the reserved access beam to access the target cell, which can reduce access failures caused by the terminal device being unable to use the access beam to access the target cell and improve the success rate of the terminal device accessing the target cell.

[0044] Optionally, the second network device receives the first information, including receiving the first information from the first network device.

[0045] Optionally, the second network device is a centralized unit of the target network device, and the second network device receives the first information, including: receiving the first information from the centralized unit of the source network device.

[0046] In one optional implementation, the second network device further reserves access resources for the terminal device based on the first information. For example, the second network device may reserve the access beam indicated by the first information for accessing the target cell. This approach allows the terminal device to directly access the target cell using the reserved access resources after switching to the second network device, reducing access failures caused by the terminal device being unable to use the access beam to access the target cell and improving the success rate of the terminal device accessing the target cell.

[0047] In one alternative implementation, the second network device also sends the first information to the sixth network device.

[0048] Optionally, when the second network device sends the first information, the second network device is a centralized unit of the target network device, and the sixth network device is a distributed unit of the target network device.

[0049] Based on the above scheme, the centralized unit of the target network device directly sends the first information to the distributed unit of the target network device, which is beneficial for the distributed unit of the target network device to reserve access resources for the terminal device according to the first information, thereby improving the success rate of the terminal device accessing the target cell.

[0050] In another optional implementation, the second network device sends seventh information to the sixth network device corresponding to the first cell. The seventh information is used to indicate at least one of the following: a first beam, a second beam, the dwell time / dwelling period of the terminal device in the first beam, the dwell time / dwelling period of the terminal device in the second beam, or the time information of the terminal device accessing the first cell.

[0051] Optionally, when the second network device sends the seventh information, the second network device is a centralized unit of the target network device, and the sixth network device is a distributed unit of the target network device.

[0052] Based on the above scheme, after receiving the first information, the centralized unit of the target network device, through the seventh information, instructs the distributed unit corresponding to the target cell indicated by the first information to at least one of the following: an access beam for accessing the target cell, a communication beam for communication within the target cell, the dwell time / stay period of the terminal device within the access beam, the dwell time / stay period of the terminal device within the communication beam, or the time information of the terminal device accessing the target cell. This method is beneficial to the distributed unit of the target cell, which can reserve corresponding resources for the terminal device based on the received information, such as reserving an access beam for accessing the target cell, thereby improving the success rate of the terminal device accessing the target cell.

[0053] In one optional implementation, the second network device performs the following operations: acquiring fifth information, which indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time / dwelling period of the terminal device within the fourth beam, the dwell time / dwelling period of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell; and sending the fifth information. Wherein, the second cell is the cell corresponding to the second network device.

[0054] Based on the above scheme, the target network device also acquires the mobility information of the terminal device in the cell served by the target network device and feeds back the mobility information. The mobility information includes at least one of the following: the target cell accessed, the access beam used to access the target cell, the communication beam used for communication within the target cell, the dwell time / dwelling period within the access beam, the dwell time / dwelling period within the communication beam, or the communication performance indicators of the terminal device within the target cell. This method is beneficial for the source network device to monitor and predict performance based on the mobility information fed back by the target network device, such as monitoring the performance of the model used to predict the first information, so as to optimize the predictive performance of the model.

[0055] In one optional implementation, the second network device receives sixth information, which is used to request the acquisition of the terminal device's mobility information in the cell corresponding to the second network device.

[0056] Based on the above scheme, the target network device can, upon receiving the sixth information, feed back the terminal device's mobility information in the cell served by the second network device to the source network device.

[0057] Optionally, other embodiments of the second aspect can be found in the other embodiments of the first aspect described above, and will not be repeated here.

[0058] Thirdly, embodiments of this application also provide a communication method, which can be executed by a centralized unit of a source network device. Here, the centralized unit of the source network device can refer to the centralized unit of the source network device itself, or to a processor, module, chip, or chip system that is equivalent to a centralized unit of the source network device to implement the method. In this method, the first network device is a distributed unit of the source network device for which the terminal device performs switching, and the second network device is a centralized unit of the target network device for which the terminal device performs switching.

[0059] The method includes: a centralized unit of the source network device receiving first information, the first information being used to indicate a first cell to be accessed by the terminal device and a first beam for accessing the first cell, the first cell being a cell corresponding to the second network device.

[0060] As can be seen, in this method, the centralized unit of the source network device obtains the target cell (first cell) to be accessed by the terminal device and the access beam (first beam) used to access the target cell by receiving the first information. This facilitates the centralized unit of the source network device to indicate the target cell to be accessed by the terminal device and the access beam used to access the target cell to the centralized unit of the target network device. In turn, it facilitates triggering the distributed unit corresponding to the target cell to reserve access resources for the terminal device according to the target cell and the access beam, such as reserving the access beam used to access the target cell. This allows the terminal device to directly use the reserved access beam to access the target cell, which can reduce access failures caused by the terminal device being unable to use the access beam to access the target cell and improve the success rate of the terminal device accessing the target cell.

[0061] In one optional implementation, the centralized unit of the source network device receives the first information, including receiving the first information from the first network device. Alternatively, the centralized unit of the source network device receives the first information from the distributed unit of the source network device.

[0062] In one optional implementation, the centralized unit of the source network device sends first information to the second network device. Alternatively, the centralized unit of the source network device sends first information to the centralized unit of the target network device. Thus, the centralized unit of the source network device can indicate to the centralized unit of the target network device the target cell to which the terminal device needs to access, and the access beam used to access that target cell. This facilitates triggering the distributed unit corresponding to the target cell to reserve access resources for the terminal device based on the target cell and the access beam, such as reserving the access beam for accessing the target cell. This allows the terminal device to directly use the reserved access beam to access the target cell, reducing access failures caused by the terminal device's inability to use the access beam to access the target cell, and improving the success rate of the terminal device accessing the target cell.

[0063] Optionally, the first information sent by the distributed unit of the source network device to the centralized unit of the source network device may be carried in the same message or in different messages as the first information sent by the centralized unit of the source network device to the centralized unit of the target network device. For example, after receiving the first information from the distributed unit of the source network device, the centralized unit of the source network device processes the first message carrying the first information to generate a second message to be sent to the centralized unit of the target network device, the second message including the first information.

[0064] Optionally, other embodiments of the third aspect can be found in the other embodiments of the second aspect described above, and will not be repeated here.

[0065] Fourthly, embodiments of this application also provide a communication method, which can be executed by a first network device. Here, the first network device can refer to the first network device itself, or to a processor, module, chip, or chip system that is equivalent to the first network device and implements the method. In this method, the first network device is a centralized unit of the source network device for terminal device switching, and the fourth network device is a distributed unit of the source network device for terminal device switching. The method includes: the centralized unit of the source network device receiving second information from the distributed unit of the source network device, the second information indicating layer 1 beam measurement results and / or layer 1 beam prediction results, and the second information determining / predicting first information. The centralized unit of the source network device transmitting the first information.

[0066] The first information is used to indicate the first cell to which the terminal device needs to access, the first beam for accessing the first cell, and the second beam for the terminal device to communicate within the first cell. The first cell is the cell corresponding to the second network device, and the second network device is the target network device for the terminal device to perform handover.

[0067] As can be seen, in this method, the centralized unit of the source network device indicates the target cell (first cell) to be accessed by the terminal device, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for the terminal device to communicate within the target cell through the first information, and the indicated information is determined / predicted based on the second information from the distributed unit of the source network device.

[0068] The centralized unit designation of the source network device for the target cell and the access beam used to access the target cell allows the distributed unit corresponding to the target cell to reserve access resources for the terminal device based on the target cell and the access beam. For example, reserving the access beam for accessing the target cell allows the terminal device to directly use the reserved access beam to access the target cell, reducing access failures caused by the terminal device being unable to use the specified access beam and improving the success rate of the terminal device accessing the target cell. Similarly, the centralized unit designation of the source network device for the communication beam used for communication within the target cell allows the distributed unit corresponding to the target cell to reserve communication resources for the terminal device based on the communication beam. For example, reserving the communication beam for communication within the target cell allows the terminal device to directly use the reserved communication resources for communication within the target cell, improving the communication performance of the terminal device within the target cell.

[0069] Optionally, the centralized unit of the source network device sends the first information, including sending the first information to the centralized unit of the target network device.

[0070] In one alternative implementation, the second information is used to determine / predict the first information in combination with at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information for indicating the third beam of the third network device.

[0071] Based on the above scheme, the centralized unit of the source network device can determine / predict the first information based on the second information and at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information used to indicate the third beam of the third network device. Thus, the centralized unit of the source network device can use the first information to indicate the target cell to which the terminal device needs to access, the access beam used to access the target cell, and the communication beam used for communication within the target cell. This facilitates the distributed unit of the target network device reserving access and communication resources for the terminal device based on the indicated information, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0072] Alternatively, other embodiments of the third aspect can be found in the other embodiments of the first aspect described above, and will not be repeated here.

[0073] Fifthly, embodiments of this application also provide a communication method, which can be executed by a first network device. Here, the first network device can refer to the first network device itself, or to a processor, module, chip, or chip system that is equivalent to the first network device and implements the method. In this method, the first network device is a distributed unit of the source network device for terminal device switching, and the fifth network device is a centralized unit of the source network device for terminal device switching. The method includes: the distributed unit of the source network device receiving third information from the centralized unit of the source network device, the third information indicating at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information about the third beam of the third network device, the third information being used to determine / predict the first information. The distributed unit of the source network device then transmits the first information.

[0074] The first information is used to indicate the first cell that the terminal device needs to access, the first beam used to access the first cell, and the second beam used for the terminal device to communicate within the first cell. The first cell is the cell corresponding to the second network device, and the second network device is the target network device for the terminal device to switch.

[0075] As can be seen, in this method, the distributed unit of the source network device indicates the target cell (first cell) to be accessed by the terminal device, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for communication within the target cell through the first information, and the indicated information is determined / predicted based on the third information from the centralized unit of the source network device.

[0076] The method of the source network device's distributed unit indicating the target cell and the access beam used to access the target cell is beneficial because the distributed unit corresponding to the target cell can reserve access resources for the terminal device based on the target cell and the access beam (e.g., reserving the access beam used to access the target cell). This allows the terminal device to directly use the reserved access beam to access the target cell, improving the success rate of the terminal device's access to the target cell. The method of the source network device's distributed unit indicating the communication beam is also beneficial because the distributed unit of the target network device corresponding to the target cell can reserve communication resources for the terminal device based on the communication beam (e.g., reserving the indicated communication beam (second beam)). This allows the terminal device to directly use the reserved communication resources to communicate within the target cell, reducing access failures caused by the terminal device's inability to use the access beam to access the target cell, and improving the terminal device's communication performance within the target cell.

[0077] Optionally, the distributed unit of the source network device sends the first information, including sending the first information to the centralized unit of the source network device.

[0078] In one alternative implementation, the third information is used to determine / predict the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0079] Based on the above scheme, the distributed unit of the source network device can determine / predict the first information based on the third information and at least one of the following: Layer 1 beam measurement results or Layer 1 beam prediction results. Therefore, the distributed unit of the source network device can, through the first information, indicate the target cell to which the terminal device needs to access, the access beam used to access the target cell, and the communication beam used for communication within the target cell. This facilitates the distributed unit corresponding to the target cell reserving access and communication resources for the terminal device based on the indicated information, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0080] Optionally, other embodiments of the fourth aspect can be found in the other embodiments of the first aspect described above, and will not be repeated here.

[0081] Sixthly, embodiments of this application also provide a communication method, which can be executed by a first network device. Here, the first network device can refer to the first network device itself, or to a processor, module, chip, or chip system that is equivalent to the first network device and implements the method. In this method, the first network device is a distributed unit of the source network device for terminal device handover, and the fifth network device is a centralized unit of the source network device for terminal device handover. The method includes: the distributed unit of the source network device receiving fourth information from the centralized unit of the source network device, the fourth information being used to indicate second mobility information, or, the fourth information being used to indicate information about the second mobility information and a third beam of a third network device, and the fourth information being used to determine / predict first information. The distributed unit of the source network device then transmits the first information.

[0082] The first information is used to indicate the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell. The first cell is the cell corresponding to the second network device, and the second network device is the target network device for the terminal device to perform handover.

[0083] As can be seen, in this method, the distributed unit of the source network device indicates the target cell (first cell) to be accessed by the terminal device, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for the terminal device to communicate within the target cell through the first information, and the indicated information is determined / predicted based on the fourth information from the centralized unit of the source network device.

[0084] The method of the source network device's distributed unit indicating the target cell and the access beam used to access the target cell is beneficial for the distributed unit corresponding to the target cell to reserve access resources for the terminal device based on the target cell and the access beam. For example, reserving the access beam used to access the target cell allows the terminal device to directly use the reserved access resources to access the target cell, reducing access failures caused by the terminal device being unable to use the access beam to access the target cell, and improving the success rate of the terminal device accessing the target cell. The method of the source network device's distributed unit indicating the communication beam used for communication within the target cell is also beneficial for the distributed unit corresponding to the target cell to reserve communication resources for the terminal device based on the communication beam. For example, reserving the communication beam used for communication within the target cell allows the terminal device to directly use the reserved communication beam to communicate within the target cell, improving the terminal device's communication performance within the target cell.

[0085] Optionally, the distributed unit of the source network device sends the first information, including sending the first information to the centralized unit of the source network device.

[0086] In one alternative implementation, the fourth information is used to determine / predict the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0087] Based on the above scheme, the distributed unit of the source network device can determine / predict the first information based on the fourth information and at least one of the following: Layer 1 beam measurement results or Layer 1 beam prediction results. Therefore, the distributed unit of the source network device can instruct the terminal device on the target cell to be accessed under the target network device, the access beam used to access the target cell, and the communication beam for communication within the target cell. This allows the distributed unit of the target network device to reserve access and communication resources for the terminal device based on the indicated information, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0088] Optionally, other embodiments of the fifth aspect can be found in the other embodiments of the first aspect described above, and will not be repeated here.

[0089] Seventhly, embodiments of this application also provide a communication device. This communication device has some or all of the functions of the first network device described in the first, fourth, fifth, or sixth aspects above, or it has some or all of the functions of the second network device described in the second aspect above, or it has some or all of the functions of the centralized unit of the source network device described in the third aspect above. For example, the communication device may have some or all of the functions of the first network device described in the first aspect of this application, or it may have the functions of any one of the embodiments of this application implemented individually. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0090] In one possible design, the communication device may include a processing unit and a communication unit. The processing unit is configured to support the communication device in performing the corresponding functions described in the above method. The communication unit is used to support communication between the communication device and other communication devices. The communication device may also include a storage unit coupled to the processing unit and the communication unit, which stores necessary program instructions and data for the communication device.

[0091] In one embodiment, the communication device includes a processing unit and a communication unit, the communication device being applied to a first network device, and the processing unit being used to process signals / signaling;

[0092] The communication unit is used to send first information, which indicates a first cell to be accessed by the terminal device and a first beam for accessing the first cell. The first cell is a cell corresponding to the second network device. The first network device is the source network device for the terminal device to switch to, and the second network device is the target network device for the terminal device to switch to.

[0093] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the first aspect above, and will not be described in detail here.

[0094] In another embodiment, the communication device includes a processing unit and a communication unit, the communication device being applied to a second network device, and the processing unit being used to process signals / signaling;

[0095] The communication unit is configured to receive first information, which indicates a first cell to be accessed by the terminal device and a first beam for accessing the first cell. The first cell is the cell corresponding to the second network device. The second network device is the target network device for the terminal device to perform handover.

[0096] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the second aspect above, and will not be described in detail here.

[0097] In another embodiment, the communication device includes a processing unit and a communication unit, the communication device being applied to a centralized unit of a source network device, the processing unit being used to process signals / signaling;

[0098] The communication unit is used to receive first information, which indicates the first cell to be accessed by the terminal device and the first beam for accessing the first cell. The first cell is the cell corresponding to the second network device.

[0099] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the third aspect above, and will not be described in detail here.

[0100] In another embodiment, the communication device includes a processing unit and a communication unit, the communication device being applied to a first network device, the first network device being a centralized unit of a source network device, and the processing unit being used to process signals / signaling;

[0101] The communication unit is configured to receive second information from a distributed unit of the source network device, the second information being used to indicate layer 1 beam measurement results and / or layer 1 beam prediction results, and the second information being used to determine the first information;

[0102] The communication unit is also used to send the first information;

[0103] The first information is used to indicate the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for the terminal device to communicate within the first cell. The first cell is the cell corresponding to the second network device, and the second network device is the target network device for the terminal device to switch to.

[0104] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the fourth aspect above, and will not be described in detail here.

[0105] In another embodiment, the communication device includes a processing unit and a communication unit, the communication device being applied to a first network device, the first network device being a distributed unit of a source network device, and the processing unit being used to process signals / signaling;

[0106] The communication unit is configured to receive third information from a centralized unit of the source network device, the third information indicating at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information of the third beam of the third network device, the third information being used to determine the first information;

[0107] The communication unit is also used to send the first information;

[0108] The first information is used to indicate the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for the terminal device to communicate within the first cell. The first cell is the cell corresponding to the second network device, and the second network device is the target network device for the terminal device to switch to.

[0109] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the fifth aspect above, and will not be described in detail here.

[0110] In another embodiment, the communication device includes a processing unit and a communication unit, the communication device being applied to a first network device, the first network device being a distributed unit of a source network device, and the processing unit being used to process signals / signaling;

[0111] The communication unit is configured to receive fourth information from a centralized unit of a source network device, the fourth information being used to indicate second mobility information, or the fourth information being used to indicate the second mobility information and information of a third beam of a third network device, the fourth information being used to determine first information;

[0112] The communication unit is also used to send the first information;

[0113] The first information is used to indicate the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for the terminal device to communicate within the first cell. The first cell is the cell corresponding to the second network device, and the second network device is the target network device for the terminal device to switch to.

[0114] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the sixth aspect above, and will not be described in detail here.

[0115] As an example, the processing unit can be a processor, and the communication unit can be a transceiver unit, transceiver, or communication interface. It is understood that when the communication device is a device (e.g., a first network device or a second network device), the communication unit can be a transceiver within the communication device (e.g., a transceiver includes a transmitter and a receiver), implemented, for example, through an antenna, feeder, and codec within the communication device. Alternatively, if the communication device is a chip disposed within the device, the processing unit can be the chip's processing circuitry, logic circuitry, etc., and the communication unit can be the chip's input / output interface, such as input / output circuitry, pins, etc.

[0116] In another embodiment, the communication device is a chip or chip system. The processing unit may also be a processing circuit or logic circuit; the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system.

[0117] In implementation, the processor can be used for, but is not limited to, baseband-related processing, and the transceiver can be used for, but is not limited to, radio frequency transceiver. These devices can be disposed on separate chips, or at least partially or entirely on the same chip. For example, the processor can be further divided into analog baseband processors and digital baseband processors. The analog baseband processor can be integrated with the transceiver on the same chip, while the digital baseband processor can be disposed on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be integrated with multiple application processors (e.g., but not limited to graphics processors, multimedia processors, etc.) on the same chip. Such a chip can be called a system-on-a-chip (SoC). Whether the various devices are disposed independently on different chips or integrated on one or more chips often depends on the needs of the product design. This application does not limit the implementation form of the above-mentioned devices.

[0118] Furthermore, when a component in a communication device acts as the executing entity, the process of sending information (or signals) in the above-described method can be understood as a process of outputting information based on a processor-based computer program or instructions. When outputting information, the processor sends the information to a transceiver for transmission. After being output by the processor, the information may undergo further processing before reaching the transceiver. Similarly, when the processor receives input information, the transceiver receives the information and inputs it into the processor. Further, after receiving the information, the transceiver may undergo further processing before inputting it into the processor. Unless otherwise specified, or if it does not contradict its actual function or internal logic in the relevant description, the processor's operations involving sending and / or receiving can generally be understood as the output of a processor-based computer program or instructions. In implementation, the processor can be a dedicated processor for executing these methods, or a processor that executes computer programs or instructions stored in memory to perform these methods, such as a general-purpose processor. For example, the processor can also be used to execute a program stored in memory, which, when executed, causes the communication device to perform the method as shown in the first aspect or any possible design of the first aspect described above.

[0119] Eighthly, embodiments of this application also provide a processor for executing the various methods described above. During the execution of these methods, the processes related to sending and receiving the aforementioned information can be understood as the processor outputting the aforementioned information and the processor receiving the input information. When outputting the aforementioned information, the processor outputs the information to a transceiver for transmission. After being output by the processor, the information may require further processing before reaching the transceiver. Similarly, when the processor receives the input information, the transceiver receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information may require further processing before being input to the processor.

[0120] Unless otherwise specified, or unless it contradicts its actual function or internal logic in the relevant description, the transmission and reception operations involved by the processor can be more generally understood as processor output and reception, input and other operations, rather than transmission and reception operations directly performed by radio frequency circuits and antennas.

[0121] In implementation, the processor can be a dedicated processor for executing these methods, or it can be a processor that executes computer instructions stored in memory to execute these methods, such as a general-purpose processor. The memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or disposed on different chips. This application does not limit the type of memory or the arrangement of the memory and processor.

[0122] Ninthly, embodiments of this application also provide a communication system, the system including a first network device for performing the methods described in the first, fourth, fifth, or sixth aspects, and a second network device for performing the methods described in the second aspect. In another possible design, the system may further include other device / functional network elements that interact with at least one of the first and second network devices, such as a centralized unit for performing the source network device of the third aspect, or a terminal device.

[0123] In a tenth aspect, embodiments of this application provide a computer-readable storage medium for storing instructions that, when executed on a communication device, implement the method described in any one of the first to sixth aspects.

[0124] Eleventhly, embodiments of this application also provide a computer program product including instructions that, when executed on a communication device, implement the method described in any one of the first to sixth aspects.

[0125] In a twelfth aspect, this application provides a chip including a processor (or logic circuitry) for implementing the methods in any possible implementation of any of the first to sixth aspects. Optionally, the chip may also include a communication interface (or interface). In one possible implementation, if the chip is the smallest processing unit in the entire device, the chip may be a processor, or it may include a processor and a memory, or it may include a processor, a memory, and a transceiver for implementing the methods in any possible implementation of any of the first to sixth aspects.

[0126] In a thirteenth aspect, this application provides a chip system. The chip system includes a processor and an interface, the interface being used to acquire programs or instructions, and the processor being used to invoke the programs or instructions to implement the functions involved in any of the first to sixth aspects. In one possible design, the chip system further includes a memory for storing necessary program instructions and data. The chip system may be composed of chips or may include chips and other discrete devices.

[0127] The beneficial effects of the seventh to thirteenth aspects mentioned above can be found in the descriptions of the beneficial effects in any of the first to sixth aspects, and will not be repeated here. Attached Figure Description

[0128] Figure 1 This is a schematic diagram of the architecture of a communication system;

[0129] Figure 2 This is an example diagram of an open RAN architecture;

[0130] Figure 3 This is a schematic diagram of a RAN intelligent controller architecture in an open RAN;

[0131] Figure 4 It is an interactive diagram;

[0132] Figure 5 This is another type of interactive diagram;

[0133] Figure 6 It is yet another type of interactive diagram;

[0134] Figure 7 This is a schematic diagram of beam management.

[0135] Figure 8 This is an interactive schematic diagram of a communication method provided in an embodiment of this application;

[0136] Figure 9 This is an interactive schematic diagram of another communication method provided in an embodiment of this application;

[0137] Figure 10 This is an interactive schematic diagram of another communication method provided in the embodiments of this application;

[0138] Figure 11 This is an interactive schematic diagram of another communication method provided in the embodiments of this application;

[0139] Figure 12 This is an interactive schematic diagram of another communication method provided in the embodiments of this application;

[0140] Figure 13 This is an interactive schematic diagram of another communication method provided in the embodiments of this application;

[0141] Figure 14 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0142] Figure 15 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0143] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0144] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.

[0145] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0146] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0147] It should be understood that in the embodiments of this application, "at least one (item)" refers to one or more. "More than one" refers to two or more. "At least two (items)" refers to two or three or more. "And / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can represent three cases: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple. Both "...when" and "if" indicate that a corresponding action will be taken under certain objective circumstances. They are not time limits, nor do they require a judgment action to be taken when the action is taken, nor do they imply any other limitations.

[0148] In the embodiments of this application, "instruction" may include: direct instruction, or indirect instruction, or explicit instruction, or implicit instruction.

[0149] In the embodiments of this application, "including" may include: direct inclusion, or indirect inclusion, or explicit inclusion, or implicit inclusion.

[0150] It should be understood that the prior art may change as the technical solutions evolve, and the technical solutions provided in the embodiments of this application are not limited to the prior art provided.

[0151] It should be noted that different embodiments or some steps (e.g., any one or more steps) in different embodiments of this application can be combined with each other to form new embodiments. It should also be noted that the steps or any one or more steps in different embodiments are not limited to include optional steps in a certain embodiment, mandatory steps in a certain embodiment, or both optional and mandatory steps in a certain embodiment; the embodiments of this application are not limited in this way.

[0152] It should be noted that, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions between different embodiments are consistent and can be referenced in each other.

[0153] It should be noted that the order of the steps in the embodiments of this application is not limited by this application.

[0154] It should be noted that the order of judgment of different conditions in the embodiments of this application is not limited in the embodiments of this application.

[0155] It should be noted that the terms "after" and "time" in the embodiments of this application do not strictly limit the time point.

[0156] It should be noted that the nouns and terms used in the embodiments of this application are merely examples, and may be other names. The embodiments of this application are not limited to these.

[0157] To better understand the communication methods disclosed in the embodiments of this application, the systems applicable to the embodiments of this application are described below.

[0158] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system. (Example) Figure 1 As shown, the system includes a core network, access network equipment, and terminal equipment. The terminal equipment is connected to the network equipment, for example, by accessing the core network through the access network equipment. The access network equipment can be a fifth-generation (5G) or future communication technology access network device, and the core network can be a fifth-generation core network (5GC) or a future core network; no specific limitation is made here.

[0159] In this application embodiment, the access network device refers to a radio access network (RAN) node or device that connects the terminal device to the wireless network, and can also be called a base station, network device, etc. In one application scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, or a base station in a future mobile communication system. The RAN node can be a macro base station, a micro base station, or an indoor station, and can also be a relay node or a donor node. In a satellite communication system, the RAN node can be a satellite, or a base station device mounted on a satellite. The RAN node can also be a gateway station (or ground station, earth station, signal gateway, gateway, or gateway station), etc. The RAN node can also be a high-altitude platform (HAP), a drone, a hot air balloon, a low-Earth orbit satellite, a medium-Earth orbit satellite, a high-Earth orbit satellite, etc., and is not limited here.

[0160] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For detailed descriptions of these protocol layers, refer to the relevant technical specifications of the 3rd Generation Partnership Project (3GPP). The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as within a baseband unit (BBU). RUs can be included in radio frequency equipment, such as remote radio units (RRUs) or active antenna units (AAUs). CUs can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0161] In different systems, RAN nodes may have different names. For example, in an open radio access network (O-RAN) system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, an RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0162] In addition, access network equipment may also include built-in artificial intelligence (AI) module functionality to train machine learning (ML) models and provide access network equipment with wireless-related data analysis and policy feedback.

[0163] In this embodiment, the terminal device is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. The terminal device can also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. Terminal devices can be widely used in various scenarios, such as non-terrestrial networks (NTN), device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The terminal equipment can also be a satellite communication terminal, such as a very small aperture terminal (VSAT) (commonly referred to as a VSAT terminal), a portable station, a fixed station, a vehicle-mounted or airborne satellite communication terminal, etc. It should be understood that the satellite communication terminal communicates with a satellite and can also act as a micro base station to further provide data interfaces to accessed user equipment. The embodiments of this application do not limit the specific technology or equipment form used in the terminal equipment. Furthermore, the terminal equipment may also include built-in AI module functionality to train ML models and provide wireless-related data analysis and policy feedback to access network equipment.

[0164] Please see Figure 2 , Figure 2 This is an example diagram of an open RAN architecture, which may include other components besides those shown in the diagram. Figure 2 In a communication system, network elements are connected via interfaces (e.g., NG) or air interfaces (Uu). These network element nodes, such as core network equipment, access network equipment (e.g., RAN nodes), and terminal equipment, may also contain one or more AI modules (for clarity, ...). Figure 2(Only one is shown in the image). The access network device may include multiple RAN nodes, such as CU and DU. The CU and / or DU may also be equipped with one or more AI modules. Optionally, the CU may also be separate from the user plane (UP), divided into a central unit-control plane (CU-CP) and a distributed unit-user plane (CU-UP). One or more AI models are set in the CU-CP and / or CU-UP. The AI ​​modules are used to implement corresponding AI functions. The AI ​​modules deployed in different network elements may be the same or different. The AI ​​module model can implement different functions according to different parameter configurations. The AI ​​module model may be configured based on one or more of the following parameters: structural parameters (e.g., at least one of the following: number of neural network layers, neural network width, inter-layer connections, neuron weights, neuron activation function, or bias in the activation function), input parameters (e.g., type of input parameters and / or dimension of input parameters), or output parameters (e.g., type of output parameters and / or dimension of output parameters). The bias in the activation function can also be called the bias of the neural network. An AI module can have one or more models. A model can infer an output, which includes one or more parameters. The learning, training, or inference processes of different models can be deployed on different nodes or devices, or they can be deployed on the same node or device.

[0165] Please see Figure 3 , Figure 3 This is a schematic diagram of a RAN intelligent controller (RIC) architecture in an open RAN. Figure 3As shown, the system architecture includes a Resource Interchange (RIC), which comprises near-real-time (NRT) RICs and non-real-time (Non-RT) RICs. The near-real-time RIC is used for model training and inference. For example, it is used to train an AI model and then use that AI model for inference. The near-real-time RIC can obtain network-side and / or terminal-side information from RAN nodes (e.g., CUs, CU-CPs, CU-UPs, DUs, and / or RUs) and / or terminals. This information can be used as training data or inference data. Optionally, the near-real-time RIC can deliver inference results to RAN nodes and / or terminals. Optionally, inference results can be exchanged between CUs and DUs, and / or between DUs and RUs. For example, the near-real-time RIC delivers the inference result to the DU, and the DU sends it to the RU.

[0166] The non-real-time RIC is used for model training and inference. For example, it is used to train an AI model and then use that model for inference. The non-real-time RIC can obtain network-side and / or terminal-side information from RAN nodes (e.g., CU, CU-CP, CU-UP, DU, and / or RU) and / or terminals. This information can be used as training data or inference data, and the inference results can be delivered to RAN nodes and / or terminals. Optionally, inference results can be exchanged between CU and DU, and / or between DU and RU. For example, the non-real-time RIC delivers the inference results to the DU, which then forwards them to the RU. The near-real-time RIC and non-real-time RIC can also be set up separately as network elements. Optionally, the near-real-time RIC and non-real-time RIC can also be part of other devices. For example, the near-real-time RIC is set in the RAN node (e.g., in the CU, DU), while the non-real-time RIC is set in operations, administration and maintenance (OAM), cloud servers, core network devices, or other network devices.

[0167] In one embodiment, the first network device and the second network device in this application can be... Figure 1 The system shown includes access network devices. Alternatively, the first and second network devices in this embodiment can... Figure 2 and Figure 3 The RAN node of the access network equipment in the system shown can be, for example, the CU or DU of the access network equipment. The access network equipment can be the aforementioned base station, satellite, high-altitude platform, etc.

[0168] In this embodiment, the first network device is the source network device for which the terminal device switches, and the second network device is the target network device for which the terminal device switches. Alternatively, the terminal device is currently within the service range of the first network device, and as the terminal device moves, it will switch from the first network device to the second network device.

[0169] For ease of explanation, the following description uses the access network equipment as a base station as an example. For instance, the first network device can be the source base station for which the terminal device performs a handover, and the second network device can be the target base station for which the terminal device performs a handover. As another example, the first network device can be the CU of the source base station for which the terminal device performs a handover, and the second network device can be the CU of the target base station for which the terminal device performs a handover. Yet another example, the first network device can be the DU of the source base station for which the terminal device performs a handover, and the second network device can be the CU of the target base station for which the terminal device performs a handover.

[0170] In this embodiment of the application, the terminal device may be Figures 1 to 3 The terminal devices in the system shown are described above and will not be repeated here.

[0171] Furthermore, when the solutions of this application embodiment are applied to future communication systems, the names of the corresponding network function entities may change, and this application does not limit this.

[0172] The embodiments disclosed in this application will be presented to illustrate various aspects, embodiments, or features of this application in relation to systems including multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches may also be used.

[0173] In one approach, the source base station where the terminal is switching can predict the terminal's mobility information (e.g., based on an AI model) and send the predicted mobility information to the target base station where the terminal is switching. The target base station then performs processes such as terminal mobility management, resource prediction, and resource reservation to improve the terminal's service quality within the target cell. Figure 4 This is an interactive schematic diagram. For example... Figure 4As shown, the source base station sends a handover request to the target base station. The handover request includes the terminal's predicted mobility information, which includes the cell the terminal accesses under the target base station and the duration of its stay in each cell. Additionally, the target base station can send a handover request acknowledgement to the source base station, indicating that the target base station has successfully received the mobility information from the source base station. Optionally, the handover request carries a data collection identifier (data collection ID) to request data collection.

[0174] Furthermore, base stations can also exchange relevant information. For example, a source base station can send a feedback configuration to a target base station, which then feeds back the terminal's mobility information under the target base station to the source base station. This allows the source base station to monitor and optimize the model used to predict mobility information based on the terminal's mobility information under the target base station. For example, Figure 5 This is another interactive diagram. For example... Figure 5 As shown, the source base station sends a data collection request to the target base station. This data collection request is associated with a data collection identifier, indicating a request for the target base station to provide the mobility information associated with the data collection identifier. Optionally, the data collection request sent by the source base station to the target base station is configured before the terminal device performs a handover. If the target base station agrees to provide the terminal's mobility information, it sends a data collection response to the source base station. The data collection response confirms the provision of the mobility information associated with the data collection identifier.

[0175] Furthermore, based on the feedback configuration from the source base station, the target base station sends back mobility information associated with the data collection identifier to the source base station via data collection update information; that is, it sends back the terminal's mobility information under the target base station. For example, such as Figure 6 In the interaction shown, the target base station sends data collection update information to the source base station to provide feedback on the mobility information associated with the data collection identifier.

[0176] In another approach, the base station can predict layer 1 (L1) beam measurements based on channel-state information (CSI) measurements, and then use the predicted beams for beam management. For example, Figure 7 This is a schematic diagram of beam management. Figure 7As can be seen, scanning beam set A yields measurement results for beam set A; based on the measurement results and prediction model of beam set A, beam prediction is performed on beam set B to obtain the K beams with the best signal quality in beam set B; beam scanning is then performed on these K beams to obtain the optimal beam among them. Therefore, the base station or terminal can predict the signal quality of beams in beam set B based on the beam measurement results of beams in beam set A, thereby determining the beam with the best signal quality in beam set B. Furthermore, the base station can perform mobility management and beam management of the terminal based on the optimal beam in beam set B, which reduces the beam measurement overhead of the base station or terminal.

[0177] In cell handover scenarios, if a terminal accesses the target cell using beamforming, factors such as beam load and interference levels may affect the success rate and quality of service of the terminal's access. In one approach, after handing over to the target base station, the terminal performs beam scanning and selects a beam for accessing the target cell based on the scanning results. However, the beam selected by the terminal through beam scanning may not be the beam with the optimal signal quality. For example, the beam with the optimal signal quality may have a lower load. In such cases, the beam selected by the terminal based on the beam scanning results may reduce the success rate of accessing the target cell.

[0178] This application provides a communication method 100. In this communication method 100, a first network device indicates a first cell to be accessed by a terminal device and a first beam for accessing the first cell through first information. This allows a second network device to reserve access resources for the terminal device based on the first cell and the first beam, such as reserving the first beam for accessing the first cell. Consequently, the terminal device can directly use the reserved access beam to access the first cell, reducing access failures caused by the terminal device's inability to use the access beam to access the first cell and improving the success rate of the terminal device accessing the first cell.

[0179] This application embodiment also takes a first network device as the source base station and a second network device as the target base station as an example to provide a communication method 200. In this communication method 200, the source base station sends first information to the target base station to indicate the first cell to be accessed by the terminal device and the first beam used to access the first cell. This allows the target base station to reserve access resources for the terminal device based on the first cell and the first beam, thereby enabling the terminal device to directly use the reserved access resources to access the first cell. This reduces access failures caused by the terminal device being unable to use the access resources to access the first cell, and improves the success rate of the terminal device accessing the first cell.

[0180] This application embodiment also takes a first network device as the source base station CU and a second network device as the target base station CU as an example to provide a communication method 300. In this communication method 300, the source base station CU sends first information to the target base station CU to indicate the first cell to be accessed by the terminal device and the first beam used to access the first cell. The target base station CU then indicates the first cell to be accessed by the terminal device and the first beam used to access the first cell to the corresponding DU. Thus, the target base station DU can reserve access resources for the terminal device based on the first cell and the first beam, which is beneficial for the terminal device to directly use the reserved access resources to access the first cell. This reduces access failures caused by the terminal device being unable to use the access resources to access the first cell, and improves the success rate of the terminal device accessing the first cell.

[0181] This application embodiment also takes a first network device as the CU of the source base station and a second network device as the CU of the target base station as an example to provide a communication method 400. Compared with communication method 300, in this communication method 400, the CU of the source base station receives second information from the DU of the source base station. The second information is used to indicate the Layer 1 beam measurement result and / or Layer 1 beam prediction result, and the second information is used to determine the first information. The first information is used to indicate the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell. Thus, the CU of the source base station sends the first information to the CU of the target base station to indicate the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell. This is beneficial for the CU of the target base station to trigger the DU corresponding to the first cell to reserve access resources for the terminal device according to the first cell and the first beam, and to reserve communication resources for the terminal device according to the second beam, thereby improving the success rate of the terminal device accessing the first cell and the communication performance within the first cell.

[0182] This application embodiment also takes the DU of the source base station as an example to provide a communication method 500. In this communication method 500, the DU of the source base station receives third information from the CU of the source base station. The third information is used to indicate at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information of the third beam of the third network device. The third information is used to determine the first information, which is used to indicate the first cell to which the terminal device is to access, the first beam for accessing the first cell, and the second beam for communication within the first cell. The DU of the source base station sends the first information to the CU of the source base station to indicate the first cell to which the terminal device is to access, the first beam for accessing the first cell, and the second beam for communication within the first cell. This is beneficial for the DU corresponding to the first cell to reserve access resources for the terminal device based on the first cell and the first beam, and to reserve communication resources for the terminal device based on the second beam, thereby improving the success rate of the terminal device accessing the first cell and the communication performance within the first cell.

[0183] This application embodiment also takes the first network device as the source base station DU as an example to provide a communication method 600. The difference between this communication method 600 and communication method 500 is that the first information sent by the source base station DU to the source base station CU is determined by the source base station DU based on fourth information from the source base station CU. This fourth information is used to indicate second mobility information, or it is used to indicate the second mobility information and the information of the third beam of the third network device. Therefore, in communication method 600, the source base station DU determines / predicts the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell based on fourth information that differs from the third information.

[0184] The embodiments of this application are described in detail below with reference to the accompanying drawings. This application uses a first network device and a second network device as examples to illustrate the corresponding methods. However, this application does not limit the executing entity of the method. For example, the first network device in the method can also be a processor, module, chip, chip system, or software module that supports the implementation of the corresponding method, and the second network device in the method can also be a processor, module, chip, chip system, or software module that supports the implementation of the corresponding method.

[0185] This application provides a communication method 100. Figure 8 This is an interactive schematic diagram of the communication method 100. The communication method 100 is described from the perspective of the interaction between the first network device and the second network device, and includes, but is not limited to, the following steps:

[0186] S801. The first network device sends first information, which indicates the first cell to be accessed by the terminal device and the first beam for accessing the first cell, wherein the first cell is the cell corresponding to the second network device. The second network device receives the first information.

[0187] The term "first cell" can refer to one or more cells. The first cell corresponds to the second network device, and can be replaced with: the first cell is a cell managed / served by the second network device; or it can be replaced with: the first cell is the target cell that the terminal device needs to access under the second network device; or it can be replaced with: the first cell is located within the service range of the second network device. Therefore, the first cell is the target cell that the terminal device needs to access after switching to the target network device.

[0188] Alternatively, the first beam can be the access beam used to access the target cell after the terminal device switches to the target network device.

[0189] Optionally, the first cell is the target cell that the terminal device may access after switching to the second network device, as predicted by the first network device. Optionally, the first beam is the first beam that the terminal device may use to access the first cell after switching to the second network device, as predicted by the first network device.

[0190] As can be seen, the first network device, through the first information, indicates to the second network device the target cell (first cell) that the terminal device might access after switching to the second network device, as predicted by the first network device, and the access beam (first beam) that might be used to access the target cell. This method allows the second network device to reserve access resources for the terminal device based on the target cell and the access beam that might be used to access the target cell. For example, it can reserve an access beam for the terminal device to access the target cell. This allows the terminal device to directly use the reserved access beam to access the target cell after switching to the second network device, reducing access failures caused by the terminal device being unable to use the access beam to access the target cell, and improving the success rate of the terminal device accessing the target cell.

[0191] Optionally, the target cell predicted by the first network device is the serving cell with the best signal quality after the terminal device switches to the second network device. If the terminal device connects to this target cell, the target cell can provide the terminal device with superior communication services.

[0192] Optionally, the access beam predicted by the first network device is the beam with the best signal quality among multiple beams configured for the terminal device. Therefore, if the terminal device uses this access beam to access the target cell, the success rate of the terminal device accessing the target cell can be improved.

[0193] In one optional implementation, the first information includes the cell identifier of the first cell and the beam index of the first beam, to indicate the target cell to which the terminal device is to access and the access beam used to access the target cell. For example, the first information includes the cell identifier of cell 1 and the index of synchronization signal and physical broadcast channel block (SSB) #1, where cell 1 is the cell to which the terminal device is to access, and SSB #1 is the SSB used by the terminal device to access cell 1.

[0194] In another optional implementation, the first information includes a cell list and a beam index corresponding to each cell identifier in the cell list, to indicate the target cell to which the terminal device needs to access and the access beam used to access the target cell. For example, the first information includes a cell list 1, which includes cell identifier 1 of cell 1 and cell identifier 2 of cell 2. The first information also includes the index of SSB#1 corresponding to cell identifier 1 and the index of SSB#2 corresponding to cell identifier 2. Cell 1 and cell 2 are the target cells to be accessed by the terminal device after switching to the target network device. SSB#1 is the SSB used by the terminal device to access cell 1, and SSB#2 is the SSB used by the terminal device to access cell 2.

[0195] In one optional implementation, the first information indicates a single first beam. In this case, the terminal device may use the first access beam to access the first cell.

[0196] In another alternative implementation, to take into account the accuracy of beam prediction, the first network device predicts multiple first beams for accessing the first cell, so that the first information indicates multiple first beams. In this case, the terminal device may use one of the multiple first beams to access the first cell.

[0197] Optionally, the upper limit of the number of the first beam can be preset between each network device. For example, if the upper limit of the number of the first beam is set to 63, then the first network device predicts that there are at most 63 beams for the terminal device to access the first cell.

[0198] Optionally, if the first information indicates multiple first beams, the first information may also indicate the access probability or access priority of the multiple first beams. In other words, the first information indicates the multiple first beams sequentially according to their access probability or access priority, representing the access probability / access priority of the terminal device within each of the multiple first beams. This approach allows the second network device to reserve access resources corresponding to multiple first beams for the terminal device based on their access probability or access priority, thereby improving the success rate of the terminal device accessing the target cell.

[0199] In one optional implementation, the first information is further used to indicate the dwell time / dwelling period within the first beam. For example, the first information includes a first dwell time, which is the possible dwell time within SSB#1 when the terminal device accesses cell 1 using SSB#1. As another example, the first information includes a first dwelling period, which is the possible dwelling period within SSB#1 when the terminal device accesses the cell using SSB#1.

[0200] It is evident that the first network device can also predict the dwell time / dwelling period of the terminal device within the first beam and instruct it to the second network device. This approach allows the second network device to reserve the first beam for the terminal device within a specific time domain resource, taking into account the dwell time / dwelling period within the first beam. This, in turn, enables the terminal device to access the first cell using the first beam within that specific time domain resource, reducing access failures caused by the terminal device being unable to access the first cell using the first beam within a specific time domain resource, and improving the success rate of the terminal device accessing the first cell.

[0201] In one optional implementation, the first information is further used to indicate a second beam, which is used by the terminal device for communication within the first cell. Alternatively, the second beam is a communication beam used by the terminal device for communication within the target cell; or, the second beam is a beam applicable for beam management by the terminal device within the target cell. In this approach, the first network device also predicts the communication beam used by the terminal device for communication within the target cell and indicates it to the second network device. This allows the second network device to reserve communication resources for the terminal device based on the communication beam, thereby enabling the terminal device to directly utilize the reserved communication resources for communication within the target cell. Compared to the method where the terminal device accesses the target cell, selects a beam for communication through beam scanning, and then uses the selected beam for communication, this approach improves the communication performance of the terminal device within the target cell, for example, by reducing communication latency.

[0202] In one optional implementation, if the first information also indicates a second beam, it further indicates the order in which multiple second beams are used. Alternatively, the first information can sequentially indicate multiple second beams, the order of which represents the order in which the terminal device uses them for communication within the first cell. This allows the second network device to reserve corresponding communication resources for the terminal device in the order of the multiple second beams. For example, if the multiple second beams include beam 1, beam 2, and beam 3, and the first information indicates the order of these beams as beam 2, beam 3, and beam 1, then the terminal device may first use beam 2 for communication within the target cell, then beam 3, and finally beam 1.

[0203] In another alternative implementation, if the first information also indicates a second beam, the first information indicates multiple second beams in a non-sequential manner, that is, multiple second beams are not indicated sequentially in the order in which the terminal device may be used in the target cell.

[0204] In one optional implementation, where the first information further indicates a second beam, the first information includes the cell identifier of the first cell, the index of the first beam, and the index of the second beam, to indicate the target cell to which the terminal device is to access, the access beam for accessing the target cell, and the second beam for the terminal device to communicate within the target cell. For example, the first information includes the identifier of cell 1, the index of SSB#1, and the index of SSB#2, where cell 1 is the cell to which the terminal device is to access, SSB#1 is the access beam for accessing cell 1, and SSB#2 is the communication beam for communication within cell 1.

[0205] In an optional implementation, if the first information also indicates a second beam, the first information is further used to indicate the dwell time / dwelling period within the second beam. In this approach, the first network device also predicts the dwell time / dwelling period when the terminal device will use the second beam for communication. This allows the second network device to combine the dwell time / dwelling period within the second beam to reserve communication resources for the terminal device within a specific time domain, such as reserving the second beam within a specific time domain. This, in turn, enables the terminal device to use the reserved communication resources within the specific time domain, reducing the probability that the terminal device cannot use the specific beam for communication within the specific time domain in the target cell, thereby improving the communication performance of the terminal device within the target cell.

[0206] Optionally, since the terminal device may access the same beam multiple times within the target cell, if the first information also indicates the dwell time / dwelling period of the beam, the dwell time / dwelling period of the beam indicated by the first information is the duration / time period during which the terminal device stays within that beam multiple times. For example, if the first information also indicates the dwell time / dwelling period of a second beam, the dwell time / dwelling period of the second beam indicated by the first information is the duration / time period during which the terminal device stays within the second beam multiple times.

[0207] Optionally, the first network device further receives information indicating successful reception of the first information. This information, indicating successful reception of the first information, enables the first network device to know that the first information has been successfully received.

[0208] Optionally, the first information may be a handover request, and the information indicating receipt of the first information may be a handover request acknowledgment. Optionally, the first information may also be other information, which is not limited in this embodiment.

[0209] Optionally, the first information may also be referred to as mobility information, path information, mobility path information, beam-level mobility information, beam-level path information, or beam-level mobility path information, etc. The naming of the first information is not limited in the embodiments of this application.

[0210] In one optional implementation, the first network device determines / predicts the first information before sending it. The first network device can determine / predict the first information in various ways, and this application embodiment does not limit this approach. The following describes several implementation methods for the first network device to determine / predict the first information:

[0211] Method 1: The first network device determines the first information based on at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating the third beam of the third network device.

[0212] In one optional implementation, the first network device acquires at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information indicating a third beam for the third network device. Wherein, the first network device acquires at least one of the above to determine / predict the first information.

[0213] Therefore, the first network device can determine / predict the first information based on at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information used to indicate the third beam of the third network device. Alternatively, the first network device can obtain output data, which is the first information, based on at least one of the following input data: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information used to indicate the third beam of the third network device.

[0214] Optionally, the first network device is a source base station. Then, the source base station can acquire at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating the third beam of the third network device, and determine the first information based on the acquired at least one of the above.

[0215] Optionally, the embodiments of this application do not limit the implementation method of how the first network device determines the first information based on at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information used to indicate the third beam of the third network device. For example, if the first network device has a built-in AI model that can be used to predict the first information, then the first network device will use at least one of the following as input to the AI ​​model: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information used to indicate the third beam of the third network device, to obtain the first information output by the AI ​​model. For example, the AI ​​model outputs the target cell (e.g., the first cell) to be accessed by the terminal device and the access beam (e.g., the first beam) used to access the target cell.

[0216] In one possible approach, the first mobility information is used to indicate the movement path of the terminal device before handover to the second network device, including the movement path of the terminal device within the cell corresponding to / managed / served by the first network device and the movement path of the terminal device before handover to the first network device. It can be seen that the first mobility information can be historical mobility information of the terminal device before handover to the second network device. For example, if the first network device is base station 1 and the second network device is base station 2, and the terminal device was located within the serving cell of base station 3 before handover to base station 1, the first mobility information indicates the movement path of the terminal device within the cell served by base station 3 and also indicates the movement path of the terminal device within the cell served by base station 1.

[0217] In one possible approach, the layer 3 beam measurement result is obtained by the terminal device performing layer 3 beam measurement on the configured beam, and the layer 3 beam prediction result is obtained by the terminal device or the first network device performing beam prediction based on the layer 3 beam measurement result. The beam configured for layer 3 beam measurement and the beam configured for layer 3 beam prediction are different.

[0218] In one possible approach, the Layer 1 beam measurement result is obtained by the terminal device performing Layer 1 beam measurement on a configured beam, and the Layer 1 beam prediction result is obtained by the terminal device or the first network device performing beam prediction based on the Layer 1 beam measurement result. The beam configured for Layer 1 beam measurement and the beam configured for Layer 1 beam prediction are different.

[0219] Optionally, the beam measurement results and beam prediction results in the embodiments of this application can refer to the signal quality of the beam, such as including but not limited to the signal to interference plus noise ratio (SINR) and reference signal received power (RSRP), which will not be elaborated further below.

[0220] In one possible approach, the third network device can be a network device adjacent to the first network device. For example, if the first network device is a source base station, the third network device can be a neighboring station of the source base station. Alternatively, the third network device may include the second network device. For instance, if the first network device is a source base station and the second network device is a target base station, the third network device may include the target base station.

[0221] In one possible approach, the information used to indicate the third beam includes at least one of the following: the measurement result of the third beam, the prediction result of the third beam, the number of terminal devices connected to the third beam, or the cell coverage information corresponding to the third beam. The measurement result of the third beam can be obtained by a terminal device accessing the third network device measuring the third beam and reporting it to the third network device. The prediction result of the third beam can be obtained by a terminal device accessing the third network device performing beam prediction based on the measurement result of the third beam and reporting it to the third network device. Alternatively, the prediction result of the third beam can be obtained by the third network device performing beam prediction based on the measurement result of the third beam. The number of terminal devices connected to the third beam and the cell coverage information corresponding to the third beam can be determined by the third network device itself.

[0222] Optionally, embodiments of this application do not limit how the first network device obtains at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating a third beam of the third network device. For example, the first network device may receive at least one of the following from the terminal device: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, and layer 1 beam prediction results. As another example, the first network device may perform beam prediction based on the layer 3 beam measurement results to obtain a layer 3 beam prediction result. As another example, the first network device may perform beam prediction based on the layer 1 beam measurement results to obtain a layer 1 beam prediction result. As yet another example, the first network device may receive information from the third network device for indicating a third beam.

[0223] Method 2: The first network device determines the first information based on the received second information.

[0224] In one optional implementation, the first network device receives second information from the fourth network device. The second information is used to indicate the Layer 1 beam measurement result and / or Layer 1 beam prediction result. The second information is used to determine / predict the first information, which indicates the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell.

[0225] Optionally, the layer 1 beam measurement results and layer 1 beam prediction results can be found in Method 1 above, and will not be repeated here.

[0226] As can be seen, the first network device can determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the layer 1 beam measurement results and / or layer 1 beam prediction results from the fourth network device.

[0227] In one alternative implementation, the second information is used to determine the first information in combination with at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information for indicating the third beam of the third network device.

[0228] Optionally, the first mobility information, the layer 3 beam measurement results, the layer 3 beam prediction results, and the information for indicating the third beam of the third network device can be obtained by the first network device, as described in Method 1 above, and will not be repeated here.

[0229] It is evident that the first network device can determine / predict the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell based on the layer 1 beam measurement results and / or layer 1 beam prediction results from the fourth network device, and at least one of the following: first mobility information, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating the third beam of the third network device.

[0230] Optionally, the first network device is the CU of the source base station, and the fourth network device is the DU of the source base station. Then, the CU of the source base station can receive second information from the DU of the source base station and determine the first information based on the second information. Alternatively, the CU of the source base station can receive the second information from the DU of the source base station and determine / predict the first information based on the second information and at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information used to indicate the third beam of the third network device. Wherein, the first information is used to indicate the first cell to which the terminal device needs to access, the first beam used for accessing the first cell, and the second beam used for communication within the first cell.

[0231] Method 3: The first network device determines the first information based on the received third information.

[0232] In one optional implementation, the first network device receives third information from the fifth network device. This third information indicates at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information about the third beam of the third network device. The third information is used to determine / predict the first information, which in turn indicates the first cell to which the terminal device will access, the first beam for accessing the first cell, and the second beam for communication within the first cell.

[0233] Optionally, the first mobility information, the layer 3 beam measurement results, the layer 3 beam prediction results, and the information of the third beam of the third network device can be found in the above embodiment 1, and will not be repeated here.

[0234] Therefore, the first network device can determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on at least one of the following from the fifth network device: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or third beam information from the third network device.

[0235] In one optional implementation, the third information is used to determine the first information in combination with at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results. Optionally, the layer 1 beam measurement results and layer 1 beam prediction results may be obtained by the first network device itself, as described in Method 1 above, and will not be repeated here.

[0236] Therefore, the first network device can determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on at least one of the following from the fifth network device: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information on the third beam from the third network device, as well as layer 1 beam measurement results and / or layer 1 beam prediction results.

[0237] Optionally, the first network device is the DU of the source base station, and the fifth network device is the CU of the source base station. Then, the DU of the source base station can receive third information from the CU of the source base station and determine the first information based on the third information. Alternatively, the DU of the source base station can receive the third information from the CU of the source base station and determine the first information based on the third information and at least one of the following: Layer 1 beam measurement results or Layer 1 beam prediction results. The first information is used to indicate the first cell to which the terminal device needs to access, the first beam used for accessing the first cell, and the second beam used for communication within the first cell.

[0238] Method 4: The first network device determines the first information based on the received fourth information.

[0239] In one optional implementation, the first network device receives fourth information from the fifth network device. This fourth information indicates second mobility information, or it indicates information about the second mobility information and the third beam of the third network device. The fourth information is used to determine / predict first information, and the first information indicates a first cell to which the terminal device needs to access, a first beam for accessing the first cell, and a second beam for communication within the first cell.

[0240] Optionally, the second mobility information is used to indicate the predicted movement path of the terminal device within the first cell. Alternatively, the second mobility information may be the movement information of the terminal device predicted by the fifth network device within the target cell.

[0241] Optionally, the information used to indicate the third beam can be found in Method 1 above, and will not be repeated here.

[0242] Therefore, the first network device can determine / predict the target cell to which the terminal device will access, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the second mobility information from the fifth network device. Alternatively, the first network device can determine / predict the target cell to which the terminal device will access, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the second mobility information and the third beam information from the fifth network device.

[0243] In one optional implementation, the fourth information is used to determine / predict the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results. Optionally, the layer 1 beam measurement results and layer 1 beam prediction results may be obtained by the first network device, as described in Method 1 above, and will not be repeated here.

[0244] It is evident that the first network device can determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the fourth information from the fifth network device, as well as the layer 1 beam measurement results and / or layer 1 beam prediction results.

[0245] Optionally, the first network device is the DU of the source base station, and the fifth network device is the CU of the source base station. Then, the DU of the source base station can receive fourth information from the CU of the source base station and determine / predict first information based on the fourth information. Alternatively, the DU of the source base station can receive fourth information from the CU of the source base station and determine / predict first information based on the fourth information, layer 1 beam measurement results, and / or layer 1 beam prediction results. The first information is used to indicate the first cell to which the terminal device needs to access, the first beam used for accessing the first cell, and the second beam used for communication within the first cell.

[0246] In summary, the first network device can determine / predict the first information based on at least one piece of information it has acquired, or it can determine / predict the first information based on at least one piece of information from other network devices and at least one piece of information it has acquired, thereby improving the flexibility of the first network device in determining / predicting the first information.

[0247] In one optional implementation, the first network device receives fifth information, which indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time / dwelling period of the terminal device within the fourth beam, the dwell time / dwelling period of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell. The second network device performs the following operations: acquiring the fifth information; sending the fifth information.

[0248] The second cell refers to the cell corresponding to the second network device; or, in other words, the second cell is the cell served by the second network device; or, the second cell is the cell that the terminal device accesses under the target network device after switching to the target base station. Therefore, the fourth beam is the beam actually used by the terminal device to access the second cell after switching to the target network device. The fifth beam is the beam actually used by the terminal device for communication within the second cell. The communication performance indicators of the terminal device within the second cell include, but are not limited to, packet loss rate, packet delay, and throughput.

[0249] It is evident that by receiving the fifth information, the first network device obtains at least one of the following after the terminal device switches to the second network device: the target cell to which it accesses, the access beam used to access the target cell, the communication beam used for communication within the target cell, the dwell time / dwelling period within the access beam, the dwell time / dwelling period within the communication beam, or the communication performance indicators of the terminal device within the target cell. This information is beneficial for the first network device to monitor and predict performance based on the fifth information, such as monitoring the performance of the model used to predict the first information, in order to optimize the predictive performance of the model.

[0250] Optionally, the fifth information includes at least one of the following: the cell identifier of the second cell, the index of the fourth beam corresponding to the cell identifier of the second cell, the index of the fifth beam corresponding to the cell identifier of the second cell, the dwell time / dwelling period corresponding to the index of the fourth beam, the dwell time / dwelling period corresponding to the index of the fifth beam, and the communication performance index parameter corresponding to the cell identifier of the second cell.

[0251] Optionally, the fifth information is used to indicate the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, and the dwell time / dwelling period within the fourth beam. In this case, the fifth information includes a cell list, the index of the fourth beam corresponding to the cell identifier of each second cell in the cell list, and the dwell time / dwelling period corresponding to the index of the fourth beam.

[0252] Optionally, when the fifth information is used to indicate the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, and the fifth beam used by the terminal device for communication within the second cell, the fifth information includes a cell list and the indices of the fourth and fifth beams corresponding to the cell identifiers of each second cell in the cell list. For example, the fifth information includes a cell list 1, which includes identifier 1 of cell 1 and identifier 2 of cell 2. The fifth information also includes the indices of SSB#1 and SSB#2 corresponding to identifier 1, and the indices of SSB#3, SSB#4, and SSB#5 corresponding to identifier 2. SSB#1 and SSB#2 include the access beam for accessing cell 1 and the communication beam for communication within cell 1, while SSB#3, SSB#4, and SSB#5 include the access beam for accessing cell 2 and the communication beam for communication within cell 2.

[0253] Optionally, the second network device can obtain the fifth information through various implementation methods, and this application embodiment does not limit this. For example, when the second network device is a target base station, the target base station determines the fifth information itself based on the cell accessed by the terminal device under the target base station and the beam used in the access cell. As another example, when the second network device is the CU of the target base station, the CU of the target base station can determine the fifth information based on the mobility information of the terminal device under the DU of the target base station fed back by the DU of the target base station.

[0254] In one optional implementation, before receiving the fifth information, the first network device also sends a sixth information, which requests the acquisition of the terminal device's mobility information in the cell corresponding to the target base station. The second network device receives the sixth information.

[0255] It is evident that the first network device can request the sixth information to obtain the actual movement information of the terminal device in the cell served by the target network device after the terminal device switches to the target network device, so as to monitor and predict performance based on the actual movement information of the terminal device under the target network device.

[0256] Optionally, the sixth information also indicates a first value and / or a second value, where the first value represents the maximum number of cells reported by the second network device to the first network device, and the second value represents the maximum number of beams reported by the second network device to the first network device. That is, the target network device reports a maximum of the first value number of access cells and a maximum of the second value number of beams to the source network device, including access beams for accessing the cells and communication beams for communication.

[0257] Optionally, after sending the sixth information, the first network device may also receive an indication message, which is used to confirm the mobile information of the feedback terminal device in the cell corresponding to the second network device.

[0258] Optionally, if the second cell accessed by the terminal device is the same as the first cell indicated by the first information, and the fourth beam used by the terminal device to access the second cell is the same as the first beam indicated by the first information, the second network device will not send the fifth information. Therefore, if the second cell actually accessed by the terminal device is the same as the first cell predicted by the first network device, and the beam used in the access cell is also the same as the access beam predicted by the first network device, the second network device will not feed back the actual movement information of the terminal device under that second network device, in order to reduce signaling overhead.

[0259] Optionally, if the second network device does not provide feedback on the fifth information, the first network device may default to predicting the first cell as the cell that the terminal device actually accesses under the second network device, and predicting the first beam as the beam that the terminal device actually uses to access the first beam.

[0260] Optionally, the sixth piece of information may be a data collection request, the indication information fed back by the first network device may be a data collection response, and the fifth piece of information may be a data collection update. Optionally, the fifth and sixth pieces of information may also be other information, which is not limited in this embodiment.

[0261] Optionally, the information exchange between the first network device and the second network device can be direct or indirect, and this application embodiment does not limit this. For example, if the first network device is a source base station and the second network device is a target base station, the source base station and the target base station can directly exchange information, such as the source base station directly sending the first information to the target base station.

[0262] For example, if the first network device is the CU of the source base station and the second network device is the CU of the target base station, the CU of the source base station and the CU of the target base station can also directly exchange information. For example, the CU of the source base station can directly send the first information to the CU of the target base station.

[0263] For example, if the first network device is the source base station's DU and the second network device is the target base station's CU, then the source base station's DU and the target base station's CU can indirectly exchange information through the source base station's CU. For instance, the source base station's DU sends first information to the source base station's CU, and the source base station's CU sends first information to the target base station's CU; that is, the source base station's CU can send first information to the target base station's CU through the source base station's CU. Furthermore, the first information sent by the source base station's DU to the source base station's CU and the first information sent by the source base station's CU to the target base station's CU may be carried in the same message or in different messages. For example, after receiving the first information from the source base station's DU, the source base station's CU directly sends a first message carrying the first information to the target base station's CU. Or, after receiving the first information from the source base station's DU, the source base station's CU processes the first message carrying the first information to obtain a second message to send to the target base station's CU, where the second message includes the first information.

[0264] In one optional implementation, the second network device further reserves access resources for the terminal device based on the first information. This facilitates the terminal device's ability to directly access the target cell using the reserved access resources after switching to the second network device, thereby improving the success rate of the terminal device accessing the target cell. For example, if the second network device reserves a first beam for the terminal device to access the first cell based on the first cell and first beam indicated by the first information, then after switching to the second network device, the terminal device can directly access the first cell using the reserved first beam, thus improving the success rate of the terminal device accessing the first cell.

[0265] In another optional implementation, the second network device sends the first information to the sixth network device. It is evident that after receiving the first information, the second network device can directly transmit it to the sixth network device. This allows the sixth network device to reserve access resources for the terminal device based on the first information, thereby improving the success rate of the terminal device accessing the target cell.

[0266] In another optional implementation, the second network device sends seventh information to the sixth network device corresponding to the first cell. The seventh information indicates at least one of the following: a first beam, a second beam, the duration of the terminal device's stay within the first beam, the duration of the terminal device's stay within the second beam, or the time information of the terminal device's access to the first cell. The time information of the terminal device's access to the first cell can be the time information of the terminal device using the first beam to access the first cell, or it can be determined by the second network device based on the terminal device's predicted movement path. Alternatively, the time information of the terminal device's access to the first cell can be the relative time of the second network device with the time of sending the seventh information as the starting reference point; this embodiment does not limit this.

[0267] As can be seen, after receiving the first information, the second network device can interpret it and then send the relevant information corresponding to the first cell to the sixth network device corresponding to the first cell. This method allows the sixth network device to reserve specific access resources for the terminal device based on the relevant information corresponding to the first cell, thereby improving the success rate of the terminal device accessing the first cell.

[0268] As can be seen, in this embodiment of the application, the source network device that the terminal device is switching to indicates the target cell (first cell) to be accessed by the terminal device and the access beam (first beam) for accessing the target cell through the first information. This is beneficial for the target network device to perform load balancing and resource reservation based on the target cell and the access beam. For example, it can reserve access resources for the terminal device to access the target cell, such as reserving the access beam for accessing the target cell. This is beneficial for the terminal device to be able to directly use the reserved access beam to access the target cell, which can reduce access failures caused by the terminal device being unable to use the access beam to access the target cell and improve the success rate of the terminal device accessing the target cell.

[0269] The following example, using a first network device as the source base station and a second network device as the target base station, provides a communication method 200. Figure 9 This is an interactive schematic diagram of the communication method 200. The communication method 200 is described from the perspective of the interaction between the source base station and the target base station, and includes, but is not limited to, the following steps:

[0270] S901. The source base station sends first information to the target base station. The first information indicates the first cell that the terminal device needs to access and the first beam used to access the first cell. The first cell is the cell corresponding to the target base station. Correspondingly, the target base station receives the first information from the source base station.

[0271] The first information can be found in the communication method 100 described above, and will not be repeated here.

[0272] As can be seen, the source base station sends first information to the target base station to indicate the first cell that the terminal device needs to access and the first beam used to access the first cell. Therefore, the target base station can reserve access resources for the terminal device based on the first information, such as reserving the first beam that the terminal device might use to access the first cell. Consequently, after the terminal device switches to the target base station, it can directly use the access resources reserved by the target base station, such as the first beam, to access the first cell. Compared to the method where the terminal device switches to the target base station and then selects the beam for accessing the target cell through beam scanning, and then accesses the target cell based on the selected beam, this method reduces access failures caused by the terminal device being unable to use a beam with better signal quality to access the target cell, thus improving the success rate of the terminal device accessing the first cell.

[0273] Optionally, if the first information further indicates a second beam for communication by the terminal device within the first cell, the source base station will also indicate the communication beam for communication by the terminal device within the target cell to the target base station. Thus, the target base station can reserve communication resources for the terminal device based on the communication beam, such as reserving a second beam. Consequently, after the terminal device accesses the target cell, it can directly use the reserved communication resources, such as the second beam, to communicate within the target cell. Compared to selecting a beam for communication through beam scanning after the terminal device accesses the target cell and then using the selected beam for communication, this method improves the communication performance of the terminal device within the target cell, for example, by reducing communication latency.

[0274] In one optional implementation, the source base station acquires at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating a third beam of a third network device, wherein the acquired at least one of the above is used to determine the first information.

[0275] Optionally, the first motion information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, and information for indicating the third beam can be found in the communication method 100 described above, and will not be repeated here.

[0276] It is evident that the source base station can acquire at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating the third beam of the third network device, and determine / predict the first information based on the acquired at least one of the above.

[0277] In one possible approach, the source base station acquires the first mobility information by receiving the first mobility information from the terminal device. Therefore, the terminal device can report the first mobility information to the source base station, thereby enabling the source base station to acquire the first mobility information.

[0278] In another possible approach, the source base station acquires the first mobility information by: recording mobility information #1 of the terminal device within the cell served by the source base station, and receiving mobility information #2 from base station 3, which is the base station the terminal device camped on before switching to the source base station. Therefore, the source base station can obtain the first mobility information by recording the terminal device's mobility information within the cell served by the source base station itself, and by receiving the mobility information of the terminal device within the cell it camped on before switching to the source base station.

[0279] In one possible approach, the source base station acquires the Layer 3 beam measurement results by receiving the Layer 3 beam measurement results from the terminal device. Therefore, the terminal device can report the Layer 3 beam measurement results to the source base station, thereby enabling the source base station to obtain the Layer 3 beam measurement results.

[0280] In one possible approach, where the layer 3 beam prediction result is obtained by the terminal device through beam prediction based on the layer 3 beam measurement result, the source base station acquires the layer 3 beam prediction result by receiving the layer 3 beam prediction result from the terminal device. Therefore, the terminal device can report the layer 3 beam prediction result to the source base station, thereby enabling the source base station to obtain the layer 3 beam prediction result.

[0281] In another possible approach, if the terminal device does not report the Layer 3 beam prediction result to the first network device, the source base station obtains the Layer 3 beam prediction result by performing beam prediction based on the Layer 3 beam measurement result. Therefore, the source base station can also perform beam prediction independently based on the obtained Layer 3 beam measurement result to obtain the Layer 3 beam prediction result.

[0282] Furthermore, the implementation method for the source base station to obtain the layer 1 beam measurement results can refer to the implementation method for obtaining the layer 3 beam measurement results; the implementation method for the source base station to obtain the layer 1 beam prediction results can refer to the implementation method for obtaining the layer 3 beam prediction results, and will not be repeated here.

[0283] In one possible approach, the source base station acquires information for indicating the third beam by receiving information for indicating the third beam from a neighboring station. It is evident that the information for indicating the third beam can be sent from the neighboring station to the source base station.

[0284] Optionally, the target base station sends information to the source base station indicating successful reception of the first information. Correspondingly, the source base station receives the information from the target base station indicating successful reception of the first information, thereby confirming that the target base station has successfully received the first information.

[0285] Optionally, the first information is also used to indicate at least one of the following: dwell time / dwelling period within the first beam, the second beam, or the dwell time / dwelling period within the second beam. The implementation of this information can be found in the communication method 100 described above, and will not be repeated here.

[0286] In an optional implementation, the communication method further includes the following S902:

[0287] S902. The target base station sends fifth information to the source base station. The fifth information indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time / dwelling period of the terminal device within the fourth beam, the dwell time / dwelling period of the terminal device within the fifth beam, or the communication performance indicators of the terminal device within the second cell. Correspondingly, the source base station receives the fifth information from the target base station.

[0288] The fifth piece of information can be found in the communication method 100 described above, and will not be repeated here.

[0289] As can be seen, the target base station can feed back to the source base station the actual movement information of the terminal device after it switches to the target base station, including at least one of the following: the cell actually accessed under the target base station, the beam actually used in the accessed cell, the beam actually used for communication after accessing the cell, the dwell time / dwelling period within the accessed beam, the dwell time / dwelling period within the communication beam, and the communication performance after accessing the cell. This method allows the source base station to monitor and predict performance based on the actual movement information of the terminal device under the target base station, such as monitoring the performance of the model used to predict the first information, in order to optimize the accuracy of the prediction of the first information.

[0290] Optionally, the target base station also acquires fifth information. Optionally, the target base station acquires the fifth information, including: determining the fifth information itself based on the actual cell accessed by the terminal device under the target base station, and the beam used by the accessed cell, etc.

[0291] Optionally, before receiving the fifth information from the target base station, the source base station also sends a sixth information to the target base station. The sixth information is used to request the terminal device's mobility information in the cell corresponding to the target base station. This method can be referred to in the communication method 100 above, and will not be repeated here.

[0292] Optionally, if the second cell actually accessed by the terminal device is the same as the first cell indicated by the source base station, and the fourth beam used by the terminal device to access the second cell is the same as the first beam indicated by the source base station, the target base station will not send the fifth information to the source base station in order to reduce signaling overhead.

[0293] As can be seen, in this embodiment of the application, the source base station indicates the target cell to which the terminal device should access and the access beam used to access the target cell to the target base station through the first information. This is beneficial for the target base station to reserve access resources for the terminal device based on the target cell and the access beam, such as reserving the access beam used to access the target cell. This is beneficial for the terminal device to be able to directly use the reserved access beam to access the target cell, which can reduce access failures caused by the terminal device being unable to use the access beam to access the target cell and improve the success rate of the terminal device accessing the target cell.

[0294] In addition, the target base station can also feed back to the source base station the actual movement information of the terminal device under the target base station after it switches to the target base station. This helps the source base station determine the prediction performance based on the actual movement information of the terminal device under the target base station, so as to optimize the accuracy of the prediction of the first information.

[0295] The following example uses a CU with a first network device as the source base station and a CU with a second network device as the target base station to provide a communication method 300. Figure 10 This is an interactive schematic diagram of the communication method 300. The communication method 300 is described from the perspective of the interaction between the CU of the source base station, the CU of the target base station, and the DU of the target base station, including but not limited to the following steps:

[0296] S1001. The CU of the source base station sends first information to the CU of the target base station. The first information indicates the first cell to be accessed by the terminal device and the first beam for accessing the first cell. The first cell is the cell corresponding to the CU of the target base station. Correspondingly, the CU of the target base station receives the first information from the CU of the source base station.

[0297] The first information can be found in the communication method 100 described above, and will not be repeated here.

[0298] It can be seen that the CU of the source base station sends the first information to the CU of the target base station to indicate the target cell (first cell) to be accessed by the terminal device and the access beam (first beam) used to access the target cell. This is beneficial for the CU of the target base station to trigger the DU corresponding to the target cell to reserve access resources for the terminal device according to the access beam. This is beneficial for the terminal device to directly use the reserved access resources to access the target cell, which can improve the success rate of the terminal device accessing the target cell.

[0299] In one optional implementation, the CU of the source base station acquires at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating the third beam of the third network device, and the acquired at least one of the above is used to determine the first information.

[0300] Optionally, the first motion information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, and information for indicating the third beam can be found in the communication method 100 described above, and will not be repeated here.

[0301] It is evident that the CU of the source base station can determine / predict the first information by acquiring at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information used to indicate the third beam of the third network device.

[0302] In one possible approach, the CU of the source base station obtains the first mobility information by: receiving the first mobility information from the terminal device through the DU of the source base station. Alternatively, the terminal device sends the first mobility information to the DU of the source base station, and the DU of the source base station then forwards the first mobility information to the CU of the source base station, thereby the CU of the source base station obtains the first mobility information reported by the terminal device.

[0303] In another possible approach, the CU of the source base station acquires the first mobility information, including: recording the mobility information #1 of the terminal device within the cell served by the source base station, and receiving the mobility information #2 from the CU of base station 2, which is the base station where the terminal device camped before switching to the source base station. Therefore, the source base station can record the mobility information of the terminal device within the cell served by the source base station itself, and receive the mobility information of the terminal device within the cell where it camped before switching to the source base station, thereby obtaining the first mobility information.

[0304] In one possible approach, the CU of the source base station acquires the Layer 3 beam measurement results by: receiving the Layer 3 beam measurement results from the terminal device via the DU of the source base station. Therefore, the terminal device can report the Layer 3 beam measurement results, thereby enabling the CU of the source base station to obtain the Layer 3 beam measurement results.

[0305] In one possible approach, the CU of the source base station acquires the Layer 3 beam prediction result by: receiving the Layer 3 beam prediction result from the terminal device via the DU of the source base station. Therefore, the terminal device can report the Layer 3 beam prediction result, thereby enabling the CU of the source base station to obtain the Layer 3 beam prediction result.

[0306] In another possible approach, the source base station's CU acquires the Layer 3 beam prediction results, including: performing beam prediction based on the Layer 3 beam measurement results to obtain the Layer 3 beam prediction results. It is evident that the source base station's CU can also perform beam prediction independently based on the Layer 3 beam measurement results to obtain the Layer 3 beam prediction results.

[0307] Furthermore, the implementation method for the source base station to obtain the layer 1 beam measurement results can refer to the implementation method for obtaining the layer 3 beam measurement results; the implementation method for the source base station to obtain the layer 1 beam prediction results can refer to the implementation method for obtaining the layer 3 beam prediction results, and will not be repeated here.

[0308] In one possible approach, the source base station's CU acquires information for indicating the third beam, including receiving information for indicating the third beam from a neighboring station's CU. It is evident that the information for indicating the third beam can be sent from the neighboring station's CU to the source base station's CU.

[0309] Optionally, the first information is also used to indicate at least one of the following: dwell time / dwelling period within the first beam, the second beam, or the dwell time / dwelling period within the second beam. The implementation of this information can be found in the communication method 100 described above, and will not be repeated here.

[0310] Optionally, the communication method 300 further includes the following S10021 to S1004:

[0311] S10021. The CU of the target base station sends first information to the DU of the target base station. Correspondingly, the DU of the target base station receives the first information from the CU of the target base station.

[0312] Optionally, the CU of the target base station sends first information to the DU of the target base station, including sending the first information to one or more DUs of the target base station respectively. Correspondingly, the DU of the target base station receives the first information from the CU of the target base station, including one or more DUs of the target base station respectively receiving the first information from the CU of the target base station. Therefore, the CU of the target base station can correspond to one or more DUs.

[0313] As can be seen, the CU of the target base station can directly transmit the first information from the CU of the source base station to the DU of the target base station. The DU of the target base station then interprets the first information. If the first cell is a cell served by the DU of the target base station, it can reserve access resources for the terminal device in advance based on the first information, such as reserving a first beam for accessing the first cell. Furthermore, the terminal device can directly use the access resources reserved by the DU of the target base station to access the first cell, such as directly using the first beam, which can improve the success rate of the terminal device accessing the first cell.

[0314] For example, the first information is used to indicate cell 1, cell 2, beam #1 for accessing cell 1, and beam #2 for accessing cell 2. The DU corresponding to the CU of the target base station includes DU#1, DU#2, and DU#3. After receiving the first information, the CU of the target base station sends the first information to DU#1, DU#2, and DU#3 respectively. After receiving the first information, DU#1 reserves beam #1 for the terminal device to access cell 1 because cell 1 indicated by the first information is the cell served by DU#1. After receiving the first information, DU#2 reserves beam #2 for the terminal device to access cell 2 because cell 2 indicated by the first information is the cell served by DU#2. After receiving the first information, DU#3 does not reserve access resources for the terminal device because none of the cells indicated by the first information include the cell served by DU#3. Furthermore, if the terminal device chooses to access cell 1, it can directly use the reserved beam #1 of DU#1 to access the cell, which can improve the success rate of the terminal device accessing cell 1; if the terminal device chooses to access cell 2, it can directly use the reserved beam #2 of DU#2 to access cell 2, which can improve the success rate of the terminal device accessing cell 2.

[0315] Optionally, the first information received by the CU of the target base station from the CU of the source base station may be carried in the same message as the first information sent by the CU of the target base station to the DU of the target base station, or carried in different messages. For example, after receiving the first information from the CU of the source base station, the CU of the target base station processes the first message carrying the first information to obtain a second message to be sent to the DU of the target base station, and the second message includes the first information. In this case, the first information received by the CU of the target base station from the CU of the source base station and the first information sent by the CU of the target base station to the DU of the target base station are carried in different messages.

[0316] Optionally, if the first information also indicates a second beam, and if the first cell is a cell served by a DU of a target base station, then the DU of that target base station can also reserve communication resources for the terminal device based on the second beam, such as reserving the second beam. This method is beneficial because after the terminal device accesses the first cell, it can directly use the reserved access resources for communication, such as directly using the second beam, which can improve the communication performance of the terminal device within the first cell.

[0317] Optionally, the CU of the target base station does not execute S10021, but executes the following S10022:

[0318] S10022. The CU of the target base station sends seventh information to the DU of the target base station corresponding to the first cell. The seventh information is determined based on the first information. Correspondingly, the DU of the target base station corresponding to the first cell receives the seventh information from the CU of the target base station.

[0319] The seventh piece of information is used to indicate at least one of the following: a first beam, a second beam, the dwell time / dwelling period of the terminal device within the first beam, the dwell time / dwelling period of the terminal device within the second beam, or the time information of the terminal device accessing the first cell. The time information of the terminal device accessing the first cell can be the time information of the terminal device accessing the first cell using the first beam, or it can be determined by the CU of the target base station based on the mobile path of the terminal device predicted by the CU of the source base station. Alternatively, the time information of the terminal device accessing the first cell can be the relative time of the CU of the target base station with the transmission time of the seventh piece of information as the starting reference point; this embodiment of the application does not limit this.

[0320] Optionally, since the first information also indicates a first beam for accessing the first cell, the seventh information may indicate the first beam. Optionally, if the first information also indicates a second beam for communication within the first cell, the seventh information may indicate the second beam. Optionally, if the first information also indicates the dwell time of the terminal device within the first beam, the seventh information may indicate the dwell time / dwelling period within the first beam. Optionally, if the first information, in indicating a second beam, also indicates the dwell time / dwelling period of the terminal device within the second beam, the seventh information may indicate the dwell time / dwelling period within the second beam. Optionally, the seventh information may indicate the time information for the terminal device accessing the first cell determined by the CU of the target base station.

[0321] As can be seen, after receiving the first information, the CU of the target base station can interpret the first information and then indicate the relevant information corresponding to the first cell to the DU of the target base station corresponding to the first cell. For example, it can indicate at least one of the following to the DU of the target base station corresponding to the first cell: a first beam for accessing the first cell, a second beam for communication within the first cell, the dwell time within the first beam, the dwell time within the second beam, or the time information for accessing the first cell. Therefore, the DU of the target base station corresponding to the first cell can reserve access resources for the terminal device to access the first cell based on the seventh information, such as reserving the first beam for accessing the first cell. Consequently, the terminal device can directly use the reserved access resources to access the first cell, which can improve the success rate of the terminal device accessing the first cell.

[0322] Optionally, the seventh information also indicates that, in the case of a second beam, the DU of the target base station can reserve communication resources for the terminal device based on the second beam, such as reserving a second beam for communication within the first cell. Furthermore, the terminal device can directly use the reserved communication resources for communication within the first cell, thereby improving the communication performance of the terminal device within the first cell.

[0323] For example, the first information is used to indicate cell 1, cell 2, beam #1 for accessing cell 1, and beam #2 for accessing cell 2. The DU corresponding to the CU of the target base station includes DU #1, DU #2, and DU #3. The DU corresponding to cell 1 is DU #1, and the DU corresponding to cell 2 is DU #2. Then, after interpreting the first information, the CU of the target base station sends information indicating cell 1 and beam #1 for accessing cell 1 to DU #1, and information indicating cell 2 and beam #2 for accessing cell 2 to DU #2. Thus, DU #1 can reserve access resources for the terminal device based on beam #1, for example, reserving beam #1; DU #2 can reserve access resources for the terminal device based on beam #2, for example, reserving beam #2. Furthermore, if the terminal device chooses to access cell 1, it can directly use the reserved beam #1 of DU#1 to access cell 1, which can improve the success rate of the terminal device accessing cell 1; if the terminal device chooses to access cell 2, it can directly use the reserved beam #2 of DU#2 to access cell 2, which can improve the success rate of the terminal device accessing cell 2.

[0324] S1003. The DU of the target base station sends eighth information to the CU of the target base station. The eighth information indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time of the terminal device within the fourth beam, the dwell time of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell. Correspondingly, the CU of the target base station receives the eighth information from the DU of the target base station.

[0325] Optionally, the DU of the target base station sends the eighth information to the CU of the target base station, including: one or more DUs of the target base station respectively sending the eighth information to the CU of the target base station. Correspondingly, the CU of the target base station receives the eighth information from the DU of the target base station, including: receiving the eighth information from one or more DUs of the target base station respectively.

[0326] In this context, the DU of one or more target base stations refers to the DU corresponding to one or more target cells accessed by the terminal device. For example, after the terminal device switches to the CU of the target base station and sequentially accesses cell 1, cell 2, and cell 3, the DU of the target base station includes DU#1 corresponding to cell 1, DU#2 corresponding to cell 2, and DU#3 corresponding to cell 3. The second cell is either the cell corresponding to the DU of the target base station, or the cell served by the DU of the target base station, or the cell accessed by the terminal device under the DU of the target base station. Communication performance indicators can be found in the communication method 100 described above and will not be repeated here.

[0327] As can be seen, the DU of one or more target base stations accessed by the terminal device respectively feeds back the mobility information of the terminal device under the DU of the target base station to the CU of the target base station through the eighth information. The mobility information includes at least one of the following: the second cell accessed, the fourth beam used to access the second cell, the fifth beam used for communication in the second cell, the dwell time in the fourth beam, the dwell time in the fifth beam, or the communication performance index in the second cell.

[0328] S1004. The CU of the target base station sends fifth information to the CU of the source base station, the fifth information being determined based on one or more eighth information. Correspondingly, the CU of the source base station receives the fifth information from the CU of the target base station.

[0329] The fifth piece of information indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time of the terminal device within the fourth beam, the dwell time of the terminal device within the fifth beam, or the communication performance indicators of the terminal device within the second cell. Correspondingly, the CU of the source base station receives the sixth piece of information from the CU of the target base station.

[0330] It can be seen that the CU of the target base station can determine the fifth information based on the eighth information from the DU of one or more target base stations, and then feed back the actual movement information of the terminal device under the DU of one or more target base stations to the CU of the original base station through the fifth information.

[0331] Optionally, the CU of the target base station monitors the prediction performance based on the fifth information, such as monitoring the performance of the model used to predict the first information, and can then adjust / optimize the prediction performance of the first information.

[0332] Optionally, the CU of the source base station sends a sixth message to the CU of the target base station. The sixth message is used to request the acquisition of the terminal device's mobility information under the DU of the target base station. Correspondingly, the CU of the target base station receives the sixth message from the CU of the source base station and sends the sixth message to one or more DUs of the target base station to request the one or more DUs of the target base station to feed back the actual mobility information of the terminal device.

[0333] As can be seen, in this embodiment, the CU of the source base station indicates to the CU of the target base station the target cell to which the terminal device needs to access and the access beam used to access the target cell. Therefore, the CU of the target base station triggers the DU corresponding to the target cell to reserve access resources for the terminal device according to the access beam. Consequently, the terminal device can directly use the reserved access resources to access the target cell, thereby improving the success rate of the terminal device accessing the target cell.

[0334] In addition, the DU corresponding to one or more target cells accessed by the terminal device can also feed back the actual movement information of the terminal device to the CU of the target base station. Thus, the CU of the target base station feeds back the actual movement information of the terminal device to the CU of the source base station, which in turn enables the CU of the source base station to monitor and predict performance based on the actual movement information of the terminal device, so as to optimize the prediction performance of the first information.

[0335] The following example uses a CU with the first network device as the source base station and a CU with the second network device as the target base station to provide a communication method 400. Figure 11 This is an interactive schematic diagram of the communication method 400. The communication method 400 is described from the perspective of the interaction between the CU of the source base station, the DU of the source base station, the CU of the target base station, and the DU of the target base station, including but not limited to the following steps:

[0336] S1101. The DU of the source base station sends second information to the CU of the source base station. The second information is used to indicate the Layer 1 beam measurement result and / or Layer 1 beam prediction result. The second information is used to determine the first information, which indicates the first cell to be accessed by the terminal device, the first beam for accessing the first cell, and the second beam for communication within the first cell. Correspondingly, the CU of the source base station receives the second information from the DU of the source base station.

[0337] The layer 1 beam measurement results and layer 1 beam prediction results can be found in the above-mentioned communication method 100, and will not be repeated here.

[0338] Optionally, the Layer 1 beam measurement result can be obtained by the terminal device performing Layer 1 beam measurement on the beam configured in the CU of the source base station and reporting it to the DU of the source base station. Optionally, the Layer 1 beam prediction result can be obtained by the terminal device performing beam prediction on the beam configured in the CU based on the Layer 1 beam measurement result and reporting it to the DU of the source base station. Optionally, the Layer 1 beam prediction result can be obtained by the DU of the source base station performing beam prediction based on the Layer 1 beam measurement result.

[0339] As can be seen, the CU of the source base station can receive the layer 1 beam measurement results and / or layer 1 beam prediction results from the DU of the source base station, and determine / predict the target cell (first cell) to be accessed by the terminal device, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for communication within the target cell based on the layer 1 beam measurement results and / or layer 1 beam prediction results.

[0340] In one alternative implementation, the second information is used to determine the first information in combination with at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information for indicating the third beam of the third network device.

[0341] The first mobility information, the layer 3 beam measurement result, the layer 3 beam prediction result, and the information for indicating the third network device can be obtained by the CU of the source base station. The implementation method can be found in the above-described communication method 300, and will not be repeated here.

[0342] It is evident that the CU in the source base station can receive the Layer 1 beam measurement results and / or Layer 1 beam prediction results from the DU of the source base station, and determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the Layer 1 beam measurement results and / or Layer 1 beam prediction results, and at least one of the following: first mobility information, Layer 3 beam measurement results, Layer 3 beam prediction results, or information for indicating the third beam of the third network device.

[0343] Optionally, the Layer 3 beam measurement result can be obtained by the terminal device performing Layer 3 beam measurement on the beam configured in the CU of the source base station and reporting it to the CU of the source base station. Optionally, the Layer 3 beam prediction result can be obtained by the terminal device performing Layer 3 beam prediction on the beam configured in the CU of the source base station based on the Layer 3 beam prediction result and reporting it to the CU of the source base station. Optionally, the Layer 3 beam prediction result can be obtained by the CU of the source base station performing beam prediction based on the Layer 3 beam measurement result.

[0344] Optionally, the first mobility information may be reported by the terminal device to the CU of the source base station, or it may be determined by the CU of the source base station itself. Optionally, the information used to indicate the third beam may be sent by the CU of a neighboring station to the CU of the source base station.

[0345] Optionally, the first information is also used to indicate the dwell time / dwelling period within the first beam and / or the dwell time / dwelling period within the second beam. The implementation of this information can be found in the communication method 100 described above, and will not be repeated here.

[0346] S1102. The CU of the source base station sends first information to the CU of the target base station. Correspondingly, the CU of the target base station receives the first information from the CU of the source base station.

[0347] As can be seen, after the source base station's CU predicts the first information based on the second information from the source base station's DU, it sends the first information to the target base station's CU. This first information indicates the predicted target cell for the terminal device to access, the access beam for accessing the target cell, and the communication beam for communication within the target cell to the target base station's CU. This method helps the target base station's CU trigger the DU corresponding to the target cell to reserve access resources for the terminal device based on the access beam and to reserve communication resources for the terminal device based on the communication beam, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0348] Optionally, the communication method 400 further includes the following S11031 to S1105:

[0349] S11031. The CU of the target base station sends first information to the DU of the target base station. Correspondingly, the DU of the target base station receives the first information from the CU of the target base station.

[0350] Optionally, the CU of the target base station does not execute S11031, but executes the following S11032:

[0351] S11032. The CU of the target base station sends seventh information to the DU of the target base station corresponding to the first cell. The seventh information is determined based on the first information. Correspondingly, the DU of the target base station corresponding to the first cell receives the seventh information from the CU of the target base station.

[0352] S1104. The DU of the target base station sends eighth information to the CU of the target base station. The eighth information indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time of the terminal device within the fourth beam, the dwell time of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell. Correspondingly, the CU of the target base station receives the eighth information from the DU of the target base station.

[0353] S1105. The CU of the target base station sends fifth information to the CU of the source base station, the fifth information being determined based on one or more eighth information. Correspondingly, the CU of the source base station receives the fifth information from the CU of the target base station.

[0354] In this application embodiment, the implementation methods of S11031 to S1105 can be referred to the implementation methods of S10021 to S1004 described above, and will not be repeated here.

[0355] As can be seen, in this embodiment, the CU of the source base station receives at least one of the following from the DU of the source base station: Layer 1 beam measurement result or Layer 1 beam prediction result. Based on the received at least one of the above, it determines / predicts the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell. It also indicates to the CU of the target base station the target cell to be accessed, the access beam for accessing the target cell, and the communication beam for communication within the target cell. Therefore, the CU of the target base station triggers the DU corresponding to the target cell to reserve access resources for the terminal device based on the access beam and to reserve communication resources for the terminal device based on the communication beam. Consequently, the terminal device can directly use the reserved access resources to access the target cell and can directly use the reserved communication resources to communicate within the target cell, thereby improving the success rate of the terminal device accessing the target cell and the communication performance within the target cell.

[0356] In addition, the DU corresponding to one or more target cells accessed by the terminal device can also feed back the terminal device's mobility information to the CU of the target base station. Thus, the CU of the target base station can feed back the terminal device's mobility information to the CU of the source base station, thereby enabling the CU of the source base station to monitor and predict performance based on the terminal device's mobility information, so as to optimize the prediction performance of the first information.

[0357] The following example uses a first network device as the source base station (DU) and a second network device as the target base station (CU) to provide a communication method 500. Figure 12 This is an interactive schematic diagram of the communication method 500. The communication method 500 is described from the perspective of the interaction between the source base station's CU, the source base station's DU, the target base station's CU, and the target base station's DU, including but not limited to the following steps:

[0358] S1201. The CU of the source base station sends third information to the DU of the source base station. The third information indicates at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information about the third beam of a third network device. The third information is used to determine the first information, which indicates the first cell to be accessed by the terminal device, the first beam used for accessing the first cell, and the second beam used for communication within the first cell. Accordingly, the DU of the source base station receives the third information from the CU of the source base station.

[0359] Optionally, the first mobility information, the layer 3 beam measurement result, the layer 3 beam prediction result, and the information of the third beam of the third network device can be obtained by the CU of the source base station. The implementation method can be found in the above communication method 300, and will not be repeated here.

[0360] It can be seen that the DU of the source base station can receive the third information from the CU of the source base station, and determine / predict the target cell (first cell) to be accessed by the terminal device, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for communication within the target cell based on the third information.

[0361] In one alternative implementation, the third information is used to determine the first information in combination with at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0362] Optionally, the layer 1 beam measurement results and layer 1 beam prediction results can be found in the communication method 400 described above, and will not be repeated here.

[0363] It can be seen that the DU of the source base station can receive third information from the CU of the source base station, and determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the third information and at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0364] Optionally, the first information is also used to indicate the dwell time / dwelling period within the first beam, and / or the dwell time / dwelling period within the second beam. The implementation of this information can be found in the communication method 100, and will not be repeated here.

[0365] S1202. The DU of the source base station sends first information to the CU of the source base station. Correspondingly, the CU of the source base station receives the first information from the DU of the source base station.

[0366] S1203. The CU of the source base station sends first information to the CU of the target base station. Correspondingly, the CU of the target base station receives the first information from the CU of the source base station.

[0367] Optionally, the first information received by the CU from the source base station's DU and the first information sent by the CU from the source base station to the CU from the target base station may be carried in the same message or in different messages. For example, after receiving the first information from the DU, the CU of the source base station directly sends a first message carrying the first information to the CU of the target base station. In this case, the first information received by the CU from the DU and the first information sent by the CU from the source base station to the CU from the target base station are carried in the same message. As another example, after receiving the first information from the DU, the CU of the source base station processes the first message carrying the first information to obtain a second message to be sent to the CU from the target base station. The second message includes the first information. In this case, the first information received by the CU from the DU and the first information sent by the CU from the source base station to the CU from the target base station are carried in different messages.

[0368] It is evident that after the source base station's DU determines / predicts the first information, it sends the first information to the target base station's CU through the source base station's CU. This facilitates the source base station's CU in triggering the target cell's corresponding DU to reserve access and communication resources for the terminal device based on the first information. For example, it can reserve the access beam and communication beam indicated by the first information for the terminal device. This enables the terminal device to directly access the target cell using the reserved access beam and communicate directly within the target cell using the reserved communication beam, thereby improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0369] Optionally, the communication method 500 further includes the following S12041 to S1206:

[0370] S12041. The CU of the target base station sends first information to the DU of the target base station. Correspondingly, the DU of the target base station receives the first information from the CU of the target base station.

[0371] Optionally, the CU of the target base station does not execute S12041, but executes the following S12042:

[0372] S12042. The CU of the target base station sends seventh information to the DU of the target base station corresponding to the first cell. The seventh information is determined based on the first information. Correspondingly, the DU of the target base station corresponding to the first cell receives the seventh information from the CU of the target base station.

[0373] S1205. The DU of the target base station sends eighth information to the CU of the target base station. The eighth information indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time of the terminal device within the fourth beam, the dwell time of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell. Correspondingly, the CU of the target base station receives the eighth information from the DU of the target base station.

[0374] S1206. The CU of the target base station sends fifth information to the CU of the source base station, the fifth information being determined based on one or more eighth information. Correspondingly, the CU of the source base station receives the fifth information from the CU of the target base station.

[0375] In this application embodiment, the implementation methods of S12041 to S1206 can be referred to the implementation methods of S10021 to S1004 described above, and will not be repeated here.

[0376] S1207. The CU of the source base station sends the fifth information to the DU of the source base station. Correspondingly, the DU of the source base station receives the fifth information from the CU of the source base station.

[0377] As can be seen, in this embodiment, the DU of the source base station receives at least one of the following from the CU of the source base station: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or third beam information of the third network device. Based on the received at least one of the above, it determines / predicts the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell. Furthermore, it instructs the CU of the source base station to the CU of the target base station on the target cell to access the target cell, the access beam for accessing the target cell, and the communication beam for communication within the target cell. Thus, the CU of the target base station triggers the DU corresponding to the target cell to reserve access resources for the terminal device based on the access beam and to reserve communication resources for the terminal device based on the communication beam. Consequently, the terminal device can directly use the reserved access resources to access the target cell and directly use the reserved communication resources to communicate within the target cell, thereby improving the success rate of the terminal device accessing the target cell and the communication performance within the target cell.

[0378] In addition, the DU corresponding to one or more target cells accessed by the terminal device can also feed back the terminal device's mobility information to the CU of the target base station. Thus, the CU of the target base station feeds back the terminal device's mobility information to the CU of the source base station, and the CU of the source base station feeds back the terminal device's mobility information to the DU of the source base station. This allows the DU of the source base station to monitor and predict performance based on the terminal device's mobility information, so as to optimize the prediction performance of the first information.

[0379] The following example uses a first network device as the source base station (DU) and a second network device as the target base station (CU) to provide a communication method 600. Figure 13 This is an interactive schematic diagram of the communication method 600. The communication method 600 is described from the perspective of the interaction between the source base station's CU, the source base station's DU, the target base station's CU, and the target base station's DU, including but not limited to the following steps:

[0380] S1301. The CU of the source base station sends fourth information to the DU of the source base station. The fourth information is used to indicate the second mobility information, or the fourth information is used to indicate the second mobility information and the information of the third beam of the third network device. The fourth information is used to determine the first information, and the first information is used to indicate the first cell to which the terminal device is to access, the first beam for accessing the first cell, and the second beam for the terminal device to communicate within the first cell. Correspondingly, the DU of the source base station receives the fourth information from the CU of the source base station.

[0381] Optionally, the second motion information and the information for indicating the third beam can be found in the communication method 100 described above, and will not be repeated here.

[0382] As can be seen, the DU of the source base station receives second mobility information from the CU of the source base station, and determines / predicts, based on the second mobility information, the target cell (first cell) to which the terminal device will access, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for communication within the target cell. Alternatively, the DU of the source base station receives second mobility information and information for indicating a third beam from the CU of the source base station, and determines / predicts, based on the second mobility information and the information of the third beam, the target cell (first cell) to which the terminal device will access, the access beam (first beam) for accessing the target cell, and the communication beam (second beam) for communication within the target cell.

[0383] In one alternative implementation, the fourth information is used to determine the first information in combination with at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0384] Optionally, the layer 1 beam measurement results and layer 1 beam prediction results can be found in the communication method 400 described above, and will not be repeated here.

[0385] It can be seen that the DU of the source base station can receive the fourth information from the CU of the source base station, and determine / predict the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell based on the fourth information, as well as the layer 1 beam measurement results and / or layer 1 beam prediction results.

[0386] Optionally, the first information is also used to indicate the dwell time / dwelling period within the first beam, and / or the dwell time / dwelling period within the second beam. The implementation of this information is described above and will not be repeated here.

[0387] S1302. The DU of the source base station sends first information to the CU of the source base station. Correspondingly, the CU of the source base station receives the first information from the DU of the source base station.

[0388] S1303. The CU of the source base station sends first information to the CU of the target base station. Correspondingly, the CU of the target base station receives the first information from the CU of the source base station.

[0389] Optionally, the source base station's CU does not send the first information to the target base station's CU. Instead, it sends information determined based on the first information. This determined information indicates the first cell the terminal device needs to access, the first beam for accessing the first cell, and the second beam for communication within the first cell. In other words, after receiving the first information from the source base station's DU, the source base station's CU can generate information based on the first information to send to the target base station's CU, indicating the first cell the terminal device needs to access, the first beam for accessing the first cell, and the second beam for communication within the first cell. Thus, the source base station's CU sends the generated information to the target base station's CU.

[0390] Optionally, the first information received by the CU of the source base station from the DU of the source base station may be carried in the same message as the first information sent by the CU of the source base station to the CU of the target base station, or carried in different messages. The implementation method can be found in the communication method 500 described above, and will not be repeated here.

[0391] Optionally, the communication method 600 further includes the following S13041 to S1307:

[0392] S13041. The CU of the target base station sends first information to the DU of the target base station. Correspondingly, the DU of the target base station receives the first information from the CU of the target base station.

[0393] Optionally, the CU of the target base station does not execute S13041, but executes the following S13042:

[0394] S13042. The CU of the target base station sends seventh information to the DU of the target base station corresponding to the first cell. The seventh information is determined based on the first information. Correspondingly, the DU of the target base station corresponding to the first cell receives the seventh information from the CU of the target base station.

[0395] S1305. The DU of the target base station sends eighth information to the CU of the target base station. The eighth information indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time of the terminal device within the fourth beam, the dwell time of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell. Correspondingly, the CU of the target base station receives the eighth information from the DU of the target base station.

[0396] S1306. The CU of the target base station sends fifth information to the CU of the source base station, the fifth information being determined based on one or more eighth information. Correspondingly, the CU of the source base station receives the fifth information from the CU of the target base station.

[0397] S1307. The CU of the source base station sends the fifth information to the DU of the source base station. Correspondingly, the DU of the source base station receives the fifth information from the CU of the source base station.

[0398] In this application embodiment, the implementation methods of S1302 to S1307 can be referred to the implementation methods of S1202 to S1207 described above, and will not be repeated here.

[0399] As can be seen, in this embodiment, the DU of the source base station receives second mobility information from the CU of the source base station, or the second mobility information and the information of the third beam of the third network device. Based on the received information, it determines / predicts the target cell to be accessed by the terminal device, the access beam for accessing the target cell, and the communication beam for communication within the target cell. The CU of the source base station also indicates the target cell to be accessed, the access beam for accessing the target cell, and the communication beam for communication within the target cell to the CU of the target base station. Thus, the CU of the target base station triggers the DU corresponding to the target cell to reserve access resources for the terminal device based on the access beam and to reserve communication resources for the terminal device based on the communication beam. Consequently, the terminal device can directly use the reserved access resources to access the target cell and directly use the reserved communication resources to communicate within the target cell, improving the success rate of the terminal device accessing the target cell and its communication performance within the target cell.

[0400] In addition, the DU corresponding to one or more target cells accessed by the terminal device can also feed back the terminal device's mobility information to the CU of the target base station. Thus, the CU of the target base station feeds back the terminal device's mobility information to the CU of the source base station, and the CU of the source base station feeds back the terminal device's mobility information to the DU of the source base station. This allows the DU of the source base station to monitor and predict performance based on the terminal device's mobility information, so as to optimize the prediction performance of the first information.

[0401] The following section further describes the corresponding device implementation scheme in relation to the technical solution described above.

[0402] To achieve the functions of the methods provided in the embodiments of this application, the first network device and the second network device may include hardware structures and / or software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0403] Figure 14This application provides a schematic diagram of the structure of a communication device 1400. The communication device 1400 may include modules corresponding to the methods / operations / steps / actions described in any embodiment of any of the communication methods 100 to 600. These modules may be hardware circuits, software, or a combination of hardware circuits and software.

[0404] The communication device 1400 includes a communication unit 1401 and a processing unit 1402, used to implement the methods executed by the various devices in the foregoing embodiments. The communication unit 1401 is also called a transceiver unit, which includes a sending unit and a receiving unit. The sending unit is used to send signals, and the receiving unit is used to receive signals.

[0405] In one possible implementation, the communication device 1400 is, for example, a first network device. Specifically, the communication unit 1401 is used to send first information, which indicates a first cell to be accessed by the terminal device and a first beam for accessing the first cell, wherein the first cell is a cell corresponding to the second network device; the first network device is the source network device for which the terminal device performs handover, and the second network device is the target network device for which the terminal device performs handover.

[0406] In one possible approach, the first information is also used to indicate a second beam, which is used by the terminal device to communicate within the first cell.

[0407] In one possible approach, the first information is further used to indicate the dwell time / dwelling period of the terminal device within the first beam; or, the first information is further used to indicate the dwell time / dwelling period of the terminal device within the first beam and the second beam, respectively.

[0408] In one possible approach, the first cell corresponds to multiple first beams, and the first information is further used to indicate the access probability or access priority of the multiple first beams.

[0409] In one possible manner, the processing unit 1402 is configured to acquire at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information indicating a third beam of a third network device; the acquired at least one of the above is used to determine the first information.

[0410] In another possible embodiment, the communication unit 1401 is further configured to receive second information from a fourth network device, the second information being used to indicate layer 1 beam measurement results and / or layer 1 beam prediction results, the second information being used to determine the first information.

[0411] In one possible manner, the second information is used to determine the first information in combination with at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information for indicating the third beam of the third network device.

[0412] In another possible embodiment, the communication unit 1401 is further configured to receive third information from a fifth network device, the third information indicating at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, or information about the third beam of the third network device; the third information is used to determine the first information.

[0413] In one possible approach, the third information is used to determine the first information in combination with at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0414] In another possible embodiment, the communication unit 1401 is further configured to receive fourth information from a fifth network device, the fourth information being used to indicate second mobility information, or the fourth information being used to indicate the second mobility information and information of a third beam from a third network device; the fourth information being used to determine the first information.

[0415] In one possible approach, the fourth information is used to determine the first information in combination with at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

[0416] In one possible approach, the layer 3 beam measurement result is obtained by the terminal device performing layer 3 measurements on the configured beams; the layer 3 beam prediction result is obtained by the terminal device or the first network device performing beam prediction based on the layer 3 beam measurement result.

[0417] In one possible approach, the layer 1 beam measurement result is obtained by the terminal device performing layer 1 measurement on the configured beam; the layer 1 beam prediction result is obtained by the terminal device or the first network device performing beam prediction based on the layer 1 beam measurement result.

[0418] In one possible approach, the information used to indicate the third beam includes at least one of the following: the measurement result of the third beam, the prediction result of the third beam, the number of terminal devices connected to the third beam, or the cell coverage information corresponding to the third beam.

[0419] In one possible approach, the first mobility information is used to indicate the mobility path of the terminal device before switching to the second network device.

[0420] In one possible approach, the second mobility information is used to indicate the predicted mobility path of the terminal device within the first cell.

[0421] In one possible embodiment, the communication unit 1401 is further configured to receive fifth information, which indicates at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time / dwelling period of the terminal device within the fourth beam, the dwell time / dwelling period of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell; the second cell is the cell corresponding to the second network device.

[0422] In one possible embodiment, the communication unit 1401 is further configured to send a sixth message, the sixth message being used to request the acquisition of the mobile information of the terminal device in the cell corresponding to the second network device.

[0423] In another possible implementation, the communication device 1400 is, for example, a second network device. Specifically, the communication unit 1401 is used to receive first information, which indicates a first cell to be accessed by the terminal device and a first beam for accessing the first cell, wherein the first cell is the cell corresponding to the second network device; and the second network device is the target network device for the terminal device to perform handover.

[0424] In one possible approach, the first information is also used to indicate a second beam, which is used by the terminal device to communicate within the first cell.

[0425] In one possible approach, the first information is further used to indicate the dwell time / dwelling period of the terminal device within the first beam; or, the first information is further used to indicate the dwell time / dwelling period of the terminal device within the first beam and the second beam, respectively.

[0426] In one possible approach, the first cell corresponds to multiple first beams, and the first information is further used to indicate the access probability or access priority of the multiple first beams.

[0427] In one possible approach, the processing unit 1402 is configured to reserve access resources for the terminal device based on the first information.

[0428] In another possible manner, the communication unit 1401 is also used to send the first information to a sixth network device.

[0429] In another possible embodiment, the communication unit 1401 is further configured to send seventh information to the sixth network device corresponding to the first cell, the seventh information being used to indicate at least one of the following: the first beam, the second beam, the dwell time / dwelling period of the terminal device in the first beam, the dwell time / dwelling period of the terminal device in the second beam, or the time information of the terminal device accessing the first cell.

[0430] In one possible embodiment, the processing unit 1402 is further configured to: acquire fifth information, the fifth information indicating at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication within the second cell, the dwell time / dwelling period of the terminal device within the fourth beam, the dwell time / dwelling period of the terminal device within the fifth beam, or the communication performance index of the terminal device within the second cell; and send the fifth information; wherein the second cell is the cell corresponding to the second network device.

[0431] In one possible embodiment, the communication unit 1401 is further configured to receive sixth information, the sixth information being used to request the acquisition of the mobile information of the terminal device in the cell corresponding to the second network device.

[0432] In one possible implementation, when the communication device 1400 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input / output circuit or a communication interface; the processing unit is a processor, microprocessor, integrated circuit, or logic circuit integrated on the chip.

[0433] This application also provides a communication device 1500, please refer to [link to relevant documentation]. Figure 15 , Figure 15 This is a schematic diagram of another communication device 1500. The communication device 1500 can be used to perform the steps performed by the first network device and the second network device in the above method embodiments, as described in the relevant descriptions in the above method embodiments.

[0434] The communication device 1500 includes a processor 1501. Optionally, the communication device 1500 may also include a memory 1502 and a transceiver 1503.

[0435] In one possible implementation, the processor 1501, memory 1502, and transceiver 1503 are connected via a bus, and the memory stores computer instructions. Optionally, the processor 1501 and memory 1502 can also be integrated together.

[0436] Optionally, the processing unit 1402 in the foregoing embodiments may specifically be the processor 1501 in this embodiment, therefore the specific implementation of the processor 1501 will not be described in detail. The communication unit 1401 in the foregoing embodiments may specifically be the transceiver 1503 in this embodiment, therefore the specific implementation of the transceiver 1503 will not be described in detail.

[0437] In this application, the processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in this application can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0438] In this application, the memory can be non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or it can be volatile memory, such as random-access memory (RAM). Memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures, and accessible by a computer, but is not limited to this. The memory in this application can also be a circuit or any other device capable of implementing storage functions for storing program instructions and / or data.

[0439] This application provides another communication device, which includes a processor and an interface. Optionally, it also includes a memory, with the processor coupled to the memory, the processor being used to read and execute computer instructions stored in the memory to implement the methods as shown in any of the embodiments of communication methods 100 to 600.

[0440] This application also provides a communication system, which includes a first network device and a second network device. The first network device is used to perform all or part of the steps performed by the first network device in the preceding embodiments. The second network device is used to perform all or part of the steps performed by the second network device in the preceding embodiments. In another possible design, the system may further include other devices / functional network elements that interact with at least one of the first network device and the second network device, such as a terminal device.

[0441] This application provides a computer-readable storage medium. The computer-readable storage medium stores a program or instructions. When the instructions are executed on a communication device, they implement a network service instantiation method as illustrated in any of the embodiments of communication method 100 to communication method 600.

[0442] This application provides a computer program product. The computer program product includes instructions. When executed on a communication device, the instructions implement a network service instantiation method as illustrated in any of the embodiments of communication method 100 to communication method 600.

[0443] This application provides a chip or chip system including at least one processor and an interface, the interface and at least one processor being interconnected via a circuit, the at least one processor being used to run a computer program or instructions to perform the methods shown in any of the embodiments of communication methods 100 to 600.

[0444] The interfaces in the chip can be input / output interfaces, pins, or circuits, etc.

[0445] The aforementioned chip system can be a System-on-a-Chip (SoC) or a baseband chip, etc. The baseband chip may include a processor, channel encoder, digital signal processor, modem, and interface module, etc.

[0446] In one implementation, the chip or chip system described above in this application further includes at least one memory, which stores instructions. The memory can be an internal storage unit of the chip, such as a register or cache, or it can be a storage unit of the chip itself (e.g., read-only memory, random access memory, etc.).

[0447] The technical solutions provided in this application can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media, etc.

[0448] In this application, provided there is no logical contradiction, the various embodiments may reference each other. For example, the methods and / or terms between method embodiments may reference each other, the functions and / or terms between device embodiments may reference each other, and the functions and / or terms between device embodiments and method embodiments may reference each other.

[0449] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A communication method, characterized in that, The method is applied to a first network device, and the method includes: Send first information, the first information being used to indicate the first cell to be accessed by the terminal device and the first beam for accessing the first cell, the first cell being the cell corresponding to the second network device; The first network device is the source network device for which the terminal device performs the handover, and the second network device is the target network device for which the terminal device performs the handover.

2. The method according to claim 1, characterized in that, The first information is also used to indicate a second beam, which is used by the terminal device to communicate within the first cell.

3. The method according to claim 1 or 2, characterized in that, The first information is also used to indicate the dwell time / dwelling period of the terminal device within the first beam; or, The first information is also used to indicate the dwell time / dwelling period of the terminal device in the first beam and the second beam, respectively.

4. The method according to any one of claims 1 to 3, characterized in that, The first cell corresponds to multiple first beams, and the first information is also used to indicate the access probability or access priority of the multiple first beams.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: Obtain at least one of the following: first mobility information, layer 3 beam measurement results, layer 3 beam prediction results, layer 1 beam measurement results, layer 1 beam prediction results, or information for indicating a third beam of a third network device; The above-mentioned at least one of the acquired information is used to determine the first information.

6. The method according to claim 2, characterized in that, The method further includes: Receive second information from a fourth network device, the second information being used to indicate layer 1 beam measurement results and / or layer 1 beam prediction results, the second information being used to determine the first information.

7. The method according to claim 6, characterized in that, The second information is used to determine the first information in combination with at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information indicating the third beam of the third network device.

8. The method according to claim 2, characterized in that, The method further includes: Receive third information from a fifth network device, the third information being used to indicate at least one of the following: first motion information, layer 3 beam measurement results, layer 3 beam prediction results, or information about the third beam of the third network device; The third piece of information is used to determine the first piece of information.

9. The method according to claim 8, characterized in that, The third information is used to determine the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

10. The method according to claim 2, characterized in that, The method further includes: Receive fourth information from a fifth network device, the fourth information being used to indicate second mobility information, or the fourth information being used to indicate the second mobility information and information of a third beam from a third network device; The fourth piece of information is used to determine the first piece of information.

11. The method according to claim 10, characterized in that, The fourth information is used to determine the first information by combining at least one of the following: layer 1 beam measurement results or layer 1 beam prediction results.

12. The method according to at least one of claims 5, 7, 8, and 9, characterized in that, The layer 3 beam measurement results are obtained by the terminal device performing layer 3 measurements on the configured beams. The layer 3 beam prediction result is obtained by the terminal device or the first network device through beam prediction based on the layer 3 beam measurement result.

13. The method according to at least one of claims 5, 6, 7, 9, and 11, characterized in that, The layer 1 beam measurement result is obtained by the terminal device performing layer 1 measurement on the configured beam; The layer 1 beam prediction result is obtained by the terminal device or the first network device through beam prediction based on the layer 1 beam measurement result.

14. The method according to at least one of claims 5, 7, 8, 9, 10, 11, and 12, characterized in that, The information used to indicate the third beam includes at least one of the following: the measurement result of the third beam, the prediction result of the third beam, the number of terminal devices connected to the third beam, or the cell coverage information corresponding to the third beam.

15. The method according to at least one of claims 5, 7, 8, 9, and 12, characterized in that, The first mobility information is used to indicate the mobility path of the terminal device before switching to the second network device.

16. The method according to claim 10 or 11, characterized in that, The second mobility information is used to indicate the predicted mobility path of the terminal device within the first cell.

17. The method according to any one of claims 1 to 16, characterized in that, The method further includes: Receive fifth information, the fifth information being used to indicate at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device for communication in the second cell, the dwell time / dwelling period of the terminal device in the fourth beam, the dwell time / dwelling period of the terminal device in the fifth beam, or the communication performance index of the terminal device in the second cell. The second cell is the cell corresponding to the second network device.

18. The method according to claim 17, characterized in that, The method further includes: Send a sixth message, which is used to request the acquisition of the mobile information of the terminal device in the cell corresponding to the second network device.

19. A communication method, characterized in that, The method includes: Receive first information, the first information is used to indicate the first cell to be accessed by the terminal device and the first beam for accessing the first cell, the first cell is the cell corresponding to the second network device. The second network device is the target network device for the terminal device to switch to.

20. The method according to claim 19, characterized in that, The first information is also used to indicate a second beam, which is used by the terminal device to communicate within the first cell.

21. The method according to claim 19 or 20, characterized in that, The method further includes: The first information is also used to indicate the dwell time / dwelling period of the terminal device within the first beam; or, The first information is also used to indicate the dwell time / dwelling period of the terminal device in the first beam and the second beam, respectively.

22. The method according to any one of claims 19 to 21, characterized in that, The first cell corresponds to multiple first beams, and the first information is also used to indicate the access probability or access priority of the multiple first beams.

23. The method according to any one of claims 19 to 22, characterized in that, The method further includes: Based on the first information, access resources are reserved for the terminal device.

24. The method according to any one of claims 19 to 22, characterized in that, The method further includes: The first information is sent to the second network device or the sixth network device.

25. The method according to any one of claims 19 to 22, characterized in that, The method further includes: Send a seventh message to the sixth network device corresponding to the first cell. The seventh message is used to indicate at least one of the following: the first beam, the second beam, the dwell time / stay time period of the terminal device in the first beam, the dwell time / stay time period of the terminal device in the second beam, or the time information of the terminal device accessing the first cell.

26. The method according to any one of claims 19 to 25, characterized in that, The method further includes: Obtain fifth information, which is used to indicate at least one of the following: the second cell accessed by the terminal device, the fourth beam used by the terminal device to access the second cell, the fifth beam used by the terminal device to communicate in the second cell, the dwell time / dwelling period of the terminal device in the fourth beam, the dwell time / dwelling period of the terminal device in the fifth beam, or the communication performance index of the terminal device in the second cell. Send the fifth message; The second cell is the cell corresponding to the second network device.

27. A communication device, characterized in that, The communication device includes a module for performing the method according to any one of claims 1 to 18, or includes a module for performing the method according to any one of claims 19 to 26.

28. A communication device, characterized in that, The communication device includes a processor configured to perform the method according to any one of claims 1 to 18, or configured to perform the method according to any one of claims 19 to 26.

29. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store instructions that, when executed on a communication device, implement the method according to any one of claims 1 to 18, or implement the method according to any one of claims 19 to 26.

30. A computer program product containing instructions, characterized in that, When the instructions are executed on the communication device, they implement the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 26.

Images