Candidate primary cell configuration information processing method, device, storage medium, and product

Abstract

Embodiments of the present application relate to the technical field of communications, and provide a candidate primary cell configuration information processing method, device, a storage medium, and a product. The method comprises: a terminal device receives first indication information sent by an original primary cell network device, the first indication information being used for indicating a processing policy for layer 1 / 2 triggered mobility (LTM) candidate primary cell configuration information when a CHO-based primary cell change occurs; and the terminal device reserves or releases the LTM candidate primary cell configuration information on the basis of the first indication information. Thus, effective management of LTM candidate primary cell configuration information is achieved.

Description

Method, device, storage medium and product for processing candidate primary cell configuration information

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 8, 2024, with application number 202410175842.4 and application name “Processing method, device, storage medium and product for candidate primary cell configuration information”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a method, device, storage medium, and product for processing candidate primary cell configuration information. Background Art

[0003] With the continuous development of communication technology, the cell switching mechanism has been continuously improved. For example, the cell switching mechanism involves conditional handover (CHO) and layer 1 / 2 triggered mobility (LTM). The above two cell switching mechanisms are universal. For example, when the terminal device is in a single connection state, the switching of the cell may involve the above two cell switching mechanisms; for example, when the terminal device is in a dual connection state, the switching of the primary cell may also involve the above two cell switching mechanisms. In order to support the above two cell switching mechanisms, the terminal device needs to configure the LTM candidate primary cell configuration information and the CHO candidate primary cell configuration information. Therefore, when the CHO primary cell changes, the LTM candidate primary cell configuration information of the terminal device needs to be effectively processed.

[0004] Therefore, there is an urgent need for a solution to effectively process the LTM candidate primary cell configuration information, so that the LTM candidate primary cell configuration information can be released when it is not necessary to retain it to reduce the load of the terminal device, and the LTM candidate primary cell configuration information can be retained when it is necessary to retain it to avoid the waste of resources caused by repeated sending of the LTM candidate primary cell configuration information. Summary of the Invention

[0005] The embodiments of the present application provide a method, device, storage medium, and product for processing candidate primary cell configuration information, which are applied to the field of communication technology, in order to timely retain or release LTM candidate primary cell configuration information when a CHO primary cell change occurs.

[0006] In a first aspect, an embodiment of the present application provides a method for processing candidate primary cell configuration information. The method can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) configured in the terminal device. This application is not limited to this.

[0007] For example, the method includes: receiving a first indication message sent by the original primary cell network device, the first indication message is used to indicate a processing strategy for the mobility LTM candidate primary cell configuration information triggered by the 1 / 2 layer when the CHO primary cell of the terminal device changes; retaining or releasing the LTM candidate primary cell configuration information according to the first indication information.

[0008] It should be understood that in the method for processing candidate primary cell configuration information provided in the embodiments of the present application, the original primary cell network device indicates a processing strategy for the LTM candidate primary cell configuration information through indication information, so that when the terminal device determines to change the CHO primary cell, the terminal device can automatically retain or release the LTM candidate primary cell configuration information according to the processing strategy. This achieves effective management of the LTM candidate primary cell configuration information.

[0009] That is, if the terminal device always saves the LTM candidate primary cell configuration information, there may be cases where the LTM candidate primary cell configuration information is retained when it is not necessary to retain it, which will bring a large load to the terminal device. If the terminal device always releases the LTM candidate primary cell configuration information, there may be cases where the LTM candidate primary cell configuration information is released when it is necessary to retain it, resulting in a waste of resources caused by the network device repeatedly sending the LTM candidate primary cell configuration information. Therefore, the technical solution provided by the present application uses indication information to indicate the processing strategy for the LTM candidate primary cell configuration information by the original primary cell network device. When the terminal device determines to change the CHO primary cell, it can automatically retain or release the LTM candidate primary cell configuration information according to the processing strategy, without having to always save or release the LTM candidate primary cell configuration information. The LTM candidate primary cell configuration information can be released when it is not necessary to retain it, thereby reducing the load on the terminal device, and the LTM candidate primary cell configuration information can be retained when it is necessary to retain it, thereby avoiding the waste of resources caused by repeatedly sending the LTM candidate primary cell configuration information.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the first indication information includes at least one of the following information:

[0011] (1) Private indication information for releasing or retaining the LTM candidate primary cell configuration information corresponding to each CHO candidate primary cell configuration information;

[0012] (2) public indication information for releasing or retaining LTM candidate primary cell configuration information corresponding to configuration information of at least one CHO candidate primary cell set, where the configuration information of the CHO candidate primary cell set includes at least one CHO candidate primary cell configuration information;

[0013] (3) Release timing indication information: The release timing indication information is used to indicate that the configuration information of the LTM candidate primary cell should be released after the CHO primary cell change is successfully completed.

[0014] It should be understood that each CHO candidate primary cell configuration information corresponds to a private indication information. This private indication information is per CHO candidate primary cell. Therefore, by associating a corresponding private indication information with each CHO candidate primary cell and transmitting the private indication information, more refined management of LTM primary cell configuration information can be achieved.

[0015] It should also be understood that each CHO candidate primary cell set configuration information corresponds to a piece of public indication information. This public indication information is indication information per CHO candidate primary cell set. By associating the configuration information for a CHO candidate primary cell set with a corresponding piece of public indication information and transmitting the public indication information, unified first indication information can be transmitted. The more CHO candidate primary cells included in the CHO candidate primary cell set configuration information, the less public indication information needs to be transmitted, effectively saving transmission resources.

[0016] It should also be understood that the release timing indication information may be combined with the first release indication information and / or the second release indication information, so that the release timing can be selective and the content of the first indication information can be selective.

[0017] That is, the first indication information may include different contents, and the first indication information corresponds to different processing strategies when including different contents, so as to improve the flexibility of processing the LTM candidate primary cell configuration information.

[0018] It should also be understood that the above-mentioned "private indication information", "public indication information" or "release timing indication information" is information indicating the retention or release of the LTM candidate primary cell configuration information. For example, it can be a field of "retention", "release" or "release timing", or it can be a number, letter or other information representing "retention", "release" or "release timing". This application is not limited to this.

[0019] Optionally, each private indication information is carried in corresponding CHO candidate primary cell configuration information.

[0020] It should be understood that each private indication information corresponds to a CHO candidate primary cell configuration information. Therefore, the original primary cell network equipment can carry each private indication information in the corresponding CHO candidate primary cell configuration information, and all CHO candidate primary cell configuration information carrying the corresponding private indication information is carried in the RRC reconfiguration information. This carrying method can achieve more refined management of LTM primary cell configuration information.

[0021] Optionally, the configuration information of the first CHO candidate primary cell set has a first mapping relationship with the public indication information for releasing the LTM candidate primary cell configuration information; and / or, the configuration information of the second CHO candidate primary cell set has a second mapping relationship with the public indication information for retaining the LTM candidate primary cell configuration information.

[0022] It should be understood that the first mapping relationship is an association relationship between the configuration information of the first CHO candidate primary cell set and the public indication information for releasing the LTM candidate primary cell configuration information; the second mapping relationship is an association relationship between the configuration information of the second CHO candidate primary cell set and the public indication information for retaining the LTM candidate primary cell configuration information. This mapping relationship facilitates the subsequent terminal device's determination of whether to retain or release the LTM candidate primary cell configuration information.

[0023] That is to say, when the terminal device receives the first indication information including the public indication information, it can determine the public indication information corresponding to the configuration information of the set where the configuration information of the CHO target primary cell is located through the public indication information and the above-mentioned mapping relationship, and further determine whether to retain or release the LTM candidate primary cell configuration information.

[0024] Optionally, when a first condition is met, the LTM candidate primary cell configuration information is retained, where the first condition includes at least one of the following conditions:

[0025] 1. The first indication information corresponding to the CHO target primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information;

[0026] 2. The first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the public indication information for reserving the configuration information of the LTM candidate primary cell.

[0027] That is, the first indication information may include private indication information for retaining the LTM candidate primary cell configuration information, and may also include public indication information for retaining the LTM candidate primary cell configuration information. The first indication information including any of the above information has the function of instructing the terminal device to retain the LTM candidate primary cell configuration information. After the terminal device receives the first indication information and determines the CHO target primary cell, it can determine whether at least one first condition is met, and if it is determined that it is met, retain the LTM candidate primary cell configuration information.

[0028] As a result, the terminal device can retain the LTM candidate primary cell configuration information based on the processing strategy, avoiding the terminal device's repeated acquisition of the LTM candidate primary cell configuration information when performing an LTM handover, thereby reducing signaling overhead. Furthermore, when the "processing strategy for LTM candidate primary cell configuration information" is related to the CHO target primary cell, the first indication information, when including different content, corresponds to different retention strategies, thereby increasing the flexibility of retaining the LTM candidate primary cell configuration information.

[0029] It should be understood that the specific content included in the first indication information, such as private indication information for retaining the LTM candidate primary cell configuration information, or public indication information for retaining the LTM candidate primary cell configuration information, can be expressed in the form of any identifier representing "reservation", such as a number or field or other form, and the embodiments of the present application are not limited to this.

[0030] Optionally, the method further includes: if the first indication information does not include release timing indication information, releasing the LTM candidate primary cell configuration information when a second condition is met, where the second condition includes at least one of the following conditions:

[0031] 1. The CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information;

[0032] 2. The first indication information that has triggered the CHO primary cell change and has a mapping relationship with the configuration information in the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information.

[0033] That is, the first indication information may include private indication information for releasing the LTM candidate primary cell configuration information, and may also include public indication information for releasing the LTM candidate primary cell configuration information. The first indication information including the above information has the function of instructing the terminal device to release the LTM candidate primary cell configuration information. After the terminal device receives the first indication information and determines the CHO target primary cell, it can determine whether at least one second condition is met. If it is determined that the second condition is met, the terminal device can release the LTM candidate primary cell configuration information when the CHO primary cell change is triggered.

[0034] Therefore, when the "processing strategy for LTM candidate primary cell configuration information" is related to the CHO target primary cell, the first indication information corresponds to different release strategies when including different contents, so as to improve the flexibility of releasing the LTM candidate primary cell configuration information.

[0035] It should be understood that the specific content included in the first indication information, such as private indication information for releasing the LTM candidate primary cell configuration information, or public indication information for releasing the LTM candidate primary cell configuration information, can be expressed in the form of any identifier representing "release", such as a number or field or other form, and the embodiments of the present application are not limited to this.

[0036] Optionally, if the LTM candidate primary cell configuration information has been released when the CHO primary cell change fails and the first indication information corresponding to the CHO candidate primary cell when performing cell reselection is to retain the LTM candidate primary cell configuration information, the method also includes: sending a second indication information to the target primary cell network device, and the second indication information is used to indicate that the LTM candidate primary cell configuration information has been released.

[0037] That is to say, after the terminal device triggers the execution of the CHO primary cell change, the result of the execution of the CHO primary cell change is success or failure. In the case where the first indication information does not include the release timing indication information, the condition for releasing the LTM candidate primary cell configuration information is that the execution of the CHO primary cell change has been triggered, and has nothing to do with the result of the execution of the CHO primary cell change. Since when it is determined that the execution of the CHO primary cell change has failed, cell reselection can be performed and access can be made to the reselected CHO target primary cell, it is possible that the first indication information corresponding to the two previous and subsequent CHO primary cell changes is inconsistent. For example, if the first indication information before the reselection is to release the LTM candidate primary cell configuration information, the first indication information corresponding to the CHO candidate primary cell after the reselection is to retain the LTM candidate primary cell configuration information.

[0038] Then, an embodiment of the present application can send a second indication message for indicating that the LTM candidate primary cell configuration information has been released to the target primary cell network device, so that it can determine whether to reconfigure the LTM candidate primary cell for the terminal device. If the LTM candidate primary cell for the terminal device is to be reconfigured, the timeliness of the terminal device's subsequent receipt of the LTM candidate primary cell configuration information can be improved; if it is determined that the LTM candidate primary cell does not need to be reconfigured for the terminal device, waste of communication resources can be avoided.

[0039] It should be understood that the specific form of the above-mentioned "second indication information" can be a field representing "the terminal device has released the LTM candidate primary cell configuration information", or it can be an identification, index, number and other indication information representing "released", and this application does not limit this.

[0040] Optionally, the method further includes: if the first indication information includes release timing indication information, releasing the LTM candidate primary cell configuration information when a third condition is met, where the third condition includes at least one of the following conditions:

[0041] 1. The CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information;

[0042] 2. The first indication information that has successfully executed the CHO primary cell change and has a mapping relationship with the configuration information in the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information.

[0043] That is, the first indication information may also include release timing indication information, in addition to including private indication information or public indication information for releasing the LTM candidate primary cell configuration information. It should be understood that whether the first indication information includes the release timing indication information provides different release timings for the release operation. Specifically, when the first indication information does not include the release timing indication information, it indicates that the LTM candidate primary cell configuration information is released when a CHO primary cell change is performed; when the first indication information includes the release timing indication information, it indicates that the LTM candidate primary cell configuration information is released when the CHO primary cell change is successfully performed. Therefore, based on whether the first indication information includes the release timing indication information, the terminal device can choose to release the LTM candidate primary cell configuration information when a CHO primary cell change is performed, or when it is determined that the CHO primary cell change has been successfully performed, making the release timing optional.

[0044] It should also be understood that the results of a terminal device executing a CHO primary cell change may be either successful or unsuccessful. If the first indication information does not include release timing indication information, then if the CHO primary cell change fails, the terminal device releases the LTM candidate primary cell configuration information; the terminal device will perform cell reselection and re-access another CHO target primary cell; if the first indication information corresponding to the other CHO target primary cell configuration information indicates that the LTM candidate primary cell configuration information is to be retained, then the release of the LTM candidate primary cell configuration information performed by the terminal device before the cell reselection is valid, and the LTM candidate primary cell configuration information is no longer retained after the cell reselection. If the first indication information includes release timing indication information, then if the CHO primary cell change fails, the terminal device does not release the LTM candidate primary cell configuration information; the terminal device will perform cell reselection and re-access another CHO target primary cell; if the first indication information corresponding to the other CHO target primary cell configuration information indicates that the LTM candidate primary cell configuration information is to be retained, then the terminal device performs a retention operation on the LTM candidate primary cell configuration information after the cell reselection. Therefore, whether the first indication information includes the release timing indication information can make the processing strategy optional.

[0045] In combination with the first aspect, in some implementations of the first aspect, the first indication information includes: indication information for autonomously retaining or releasing the LTM candidate primary cell configuration information by the terminal device.

[0046] It should be understood that retaining or releasing the LTM candidate primary cell configuration information can be understood as a processing method. Based on the different devices that control the processing method, the information included in the first indication information is also different, and the specific scheme for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information is also different.

[0047] That is to say, the terminal device can also retain or release the LTM candidate primary cell configuration information on its own based on the first indication information sent by the original primary cell network device, so that the processing strategy for the LTM candidate primary cell configuration information has more options.

[0048] Optionally, after retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the method further includes: sending third indication information to the target primary cell network device, the third indication information being used to indicate that the terminal device has retained or released the LTM candidate primary cell configuration information.

[0049] That is, when a terminal device automatically retains or releases LTM candidate primary cell configuration information, the original primary cell network device needs to be informed of the above-mentioned self-processing results. Therefore, after the terminal device automatically retains or releases the LTM candidate primary cell configuration information, it sends third indication information to the target primary cell network device to indicate that the terminal device has retained or released the LTM candidate primary cell configuration information. This helps the target primary cell network device understand the result of the terminal device's automatic retention or release of the LTM candidate primary cell configuration information, thereby determining in the subsequent LTM handover mechanism whether to no longer repeatedly send the LTM candidate primary cell configuration information to avoid wasting communication resources, or to obtain the LTM candidate primary cell configuration information in a timely manner to meet the requirements of the subsequent LTM handover mechanism.

[0050] It should be understood that the specific form of the above-mentioned "third indication information" can be a field representing that "the terminal device has retained or released the LTM candidate primary cell configuration information", or it can be an identifier, index, number and other indication information representing "retained or released", and this application does not limit this.

[0051] In combination with the first aspect, in some implementations of the first aspect, the first indication information further includes: fourth indication information, where the fourth indication information is used to indicate whether to retain or release the first indication information.

[0052] It should be understood that the specific form of the above-mentioned "fourth indication information" can be a field representing "retaining or releasing the first indication information", or it can be an identifier, index, number or other indication information representing "retaining or releasing the first indication information", and this application does not limit this.

[0053] Optionally, after retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the method further includes any one of the following:

[0054] If the fourth indication information is used to instruct to retain the first indication information, retain the first indication information to retain or release the LTM candidate primary cell configuration information reconfigured by the original primary cell network device according to the first indication information;

[0055] If the fourth indication information is used to indicate the release of the first indication information, the first indication information is released, and the first indication information sent by the original main cell network device is received again to retain or release the LTM candidate main cell configuration information reconfigured by the original main cell network device according to the re-received first indication information.

[0056] That is to say, the first indication information can not only indicate the processing strategy for the LTM candidate primary cell configuration information, but also indicate whether the LTM candidate primary cell configuration information subsequently reconfigured by the original primary cell network device can be processed according to the processing strategy. When the fourth indication information indicates that the first indication information is to be retained, it can avoid the waste of communication resources caused by the original primary cell network device continuously sending the first indication information. When the fourth indication information indicates that the first indication information is to be released, the processing strategy can be adjusted by the original primary cell network device subsequently resending the first indication information, thereby realizing reasonable processing of the LTM candidate primary cell configuration information.

[0057] With reference to the first aspect, in certain implementations of the first aspect, the first indication information is carried in radio resource control (RRC) reconfiguration information or in dedicated signaling.

[0058] It should be understood that the embodiment of the present application carries the indication information in the radio resource control RRC reconfiguration information, which reduces the signaling overhead and effectively avoids the waste of communication resources; or carries the indication information in proprietary signaling, which can improve the parsing speed of the indication information.

[0059] In a second aspect, embodiments of the present application provide a method for processing candidate primary cell configuration information, which can be performed by the original primary cell network device, or by a component (such as a chip or circuit) configured in the original primary cell network device. This application does not limit this.

[0060] For example, the method includes: sending first indication information to the terminal device, where the first indication information is used to indicate a processing strategy for LTM candidate primary cell configuration information when a CHO primary cell change occurs in the terminal device.

[0061] In other words, the retention or release of LTM candidate primary cell configuration information by the terminal device must be triggered by the original primary cell network device. Therefore, based on the original primary cell network device sending the first indication information to the terminal device, the terminal device can obtain the processing strategy for LTM candidate primary cell configuration information when the terminal device changes its CHO primary cell. When the terminal device determines that a CHO primary cell change is required, it can automatically retain or release the LTM candidate primary cell configuration information according to the processing strategy. This achieves effective management of LTM candidate primary cell configuration information.

[0062] In conjunction with the second aspect, in some implementations of the second aspect, the first indication information includes at least one of the following information:

[0063] (1) Private indication information for releasing or retaining the LTM candidate primary cell configuration information corresponding to each CHO candidate primary cell configuration information;

[0064] (2) public indication information for releasing or retaining LTM candidate primary cell configuration information corresponding to configuration information of at least one CHO candidate primary cell set, where the configuration information of the CHO candidate primary cell set includes at least one CHO candidate primary cell configuration information;

[0065] (3) Release timing indication information: The release timing indication information is used to indicate that the configuration information of the LTM candidate primary cell should be released after the CHO primary cell change is successfully completed.

[0066] It should be understood that in the second aspect, the interpretation of each information included in the first indication information is consistent with the interpretation of each information included in the first indication information in the first aspect, and will not be repeated here.

[0067] It should be noted that the first indication information may include different contents, and the first indication information corresponds to different processing strategies when including different contents, so as to improve the flexibility of processing the LTM candidate primary cell configuration information.

[0068] In combination with the second aspect, in certain implementations of the second aspect, each private indication information is carried in the corresponding CHO candidate primary cell configuration information.

[0069] It should be understood that each private indication information corresponds to a CHO candidate primary cell configuration information. Therefore, the original primary cell network equipment can carry each private indication information in the corresponding CHO candidate primary cell configuration information, and all CHO candidate primary cell configuration information carrying the corresponding private indication information is carried in the RRC reconfiguration information. This carrying method can achieve more refined management of LTM primary cell configuration information.

[0070] In combination with the second aspect, in certain implementations of the second aspect, the configuration information of the first CHO candidate primary cell set and the public indication information for releasing the LTM candidate primary cell configuration information have a first mapping relationship; and / or, the configuration information of the second CHO candidate primary cell set and the public indication information for retaining the LTM candidate primary cell configuration information have a second mapping relationship.

[0071] It should be understood that in the second aspect, the explanation of the first mapping relationship and the second mapping relationship is consistent with the explanation of the first mapping relationship and the second mapping relationship in the first aspect, and will not be repeated here.

[0072] That is to say, when the terminal device receives the first indication information including the public indication information, it can determine the public indication information corresponding to the configuration information of the set where the configuration information of the CHO target primary cell is located through the public indication information and the above-mentioned mapping relationship, and further determine whether to retain or release the LTM candidate primary cell configuration information.

[0073] In combination with the second aspect, in certain implementations of the second aspect, the first indication information includes: indication information for autonomously retaining or releasing the LTM candidate primary cell configuration information by the terminal device.

[0074] It should be understood that retaining or releasing the LTM candidate primary cell configuration information can be understood as a processing method. Based on the different devices that control the processing method, the information included in the first indication information is also different, and the specific scheme for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information is also different.

[0075] That is to say, the terminal device can also retain or release the LTM candidate primary cell configuration information on its own based on the first indication information sent by the original primary cell network device, so that the processing strategy for the LTM candidate primary cell configuration information has more options.

[0076] In combination with the second aspect, in some implementations of the second aspect, the first indication information further includes: fourth indication information, where the fourth indication information is used to indicate whether to retain or release the first indication information.

[0077] That is to say, the first indication information can not only indicate the processing strategy for the LTM candidate primary cell configuration information, but also indicate whether the LTM candidate primary cell configuration information subsequently reconfigured by the original primary cell network device can be processed according to the processing strategy. Therefore, whether the processing strategy can continue to serve as the basis for subsequent processing is optional.

[0078] It should be understood that the specific form of the "fourth indication information" can be a field representing "retaining or releasing the first indication information", or it can be an identifier, index, number or other indication information representing "retaining or releasing the first indication information", and this application does not limit this.

[0079] In combination with the second aspect, in certain implementations of the second aspect, the first indication information is carried in radio resource control RRC reconfiguration information or in dedicated signaling.

[0080] It should be understood that the embodiment of the present application carries the indication information in the radio resource control RRC reconfiguration information, which reduces the signaling overhead and effectively avoids the waste of communication resources; or carries the indication information in proprietary signaling, which can improve the parsing speed of the indication information.

[0081] In a third aspect, an embodiment of the present application provides a device for processing candidate primary cell configuration information, comprising modules or units for executing the method in the first aspect and any possible implementation manner of the first aspect.

[0082] In a fourth aspect, a device for processing candidate primary cell configuration information is provided, comprising modules or units for executing the method in the second aspect and any possible implementation manner of the second aspect.

[0083] In a fifth aspect, a device for processing candidate primary cell configuration information is provided, comprising a processor. The processor is coupled to a memory and configured to execute instructions in the memory to implement the method of the first aspect and any possible implementation of the first aspect. Optionally, the device further comprises a memory. Optionally, the device further comprises a communication interface, the processor being coupled to the communication interface.

[0084] In one implementation, the device for processing the candidate primary cell configuration information is a terminal device. When the device for processing the candidate primary cell configuration information is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0085] In another implementation, the device for processing the candidate primary cell configuration information is a chip configured in the terminal device. When the device for processing the candidate primary cell configuration information is a chip configured in the terminal device, the communication interface may be an input / output interface.

[0086] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0087] In a sixth aspect, a device for processing candidate primary cell configuration information is provided, comprising a processor. The processor is coupled to a memory and configured to execute instructions in the memory to implement the method of the second aspect and any possible implementation thereof. Optionally, the device further comprises a memory. Optionally, the device further comprises a communication interface, the processor being coupled to the communication interface.

[0088] In one implementation, the device for processing the candidate primary cell configuration information is the original primary cell network device. When the device for processing the candidate primary cell configuration information is the original primary cell network device, the communication interface may be a transceiver, or an input / output interface.

[0089] In another implementation, the device for processing the candidate primary cell configuration information is a chip configured in the original primary cell network device. When the device for processing the candidate primary cell configuration information is a chip configured in the original primary cell network device, the communication interface may be an input / output interface.

[0090] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0091] In a seventh aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, so that the processor executes the method of any possible implementation of the first to second aspects and any possible implementation of the first to second aspects.

[0092] In a specific implementation, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, which functions as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation of the processor and various circuits.

[0093] In an eighth aspect, a processing device is provided, comprising a processor and a memory. The processor is configured to read instructions stored in the memory and receive signals via a receiver and transmit signals via a transmitter to execute the method of any possible implementation of the first and second aspects and any possible implementation of the first and second aspects.

[0094] Optionally, there are one or more processors and one or more memories.

[0095] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0096] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0097] It should be understood that related data interaction processes, such as sending indication information, can be the process of outputting indication information from the processor, and receiving capability information can be the process of receiving input capability information from the processor. Specifically, data output by the processor can be output to the transmitter, and input data received by the processor can be received from the receiver. The transmitter and receiver can be collectively referred to as a transceiver.

[0098] The processing device in the eighth aspect may be one or more chips. The processor in the processing device may be implemented in hardware or software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated into the processor or located independently of the processor.

[0099] In the ninth aspect, an embodiment of the present application provides a terminal device, including a processor, a memory and a transceiver, the memory is used to store computer execution instructions, the transceiver is used to send and receive data, the processor is used to execute the computer execution instructions stored in the memory, and when executing the computer execution instructions stored in the memory, the processor is used to instruct the terminal device to execute the method described in the above-mentioned first aspect and any possible implementation method of the first aspect.

[0100] In the tenth aspect, an embodiment of the present application provides an original primary cell network device, including a processor, a memory and a transceiver, the memory is used to store computer execution instructions, the transceiver is used to send and receive data, and the processor is used to run computer execution instructions. When the processor executes the computer execution instructions stored in the memory, it is used to instruct the original primary cell network device to execute the method described in the above second aspect and any possible implementation method of the second aspect.

[0101] In the eleventh aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is run on a computer, the computer executes the method described in the first aspect to the second aspect and any possible implementation of the first aspect to the second aspect.

[0102] In a twelfth aspect, the present application provides a chip or chip system, comprising at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a line, and the at least one processor is configured to execute a computer program or instruction to perform the method described in the first aspect or any possible implementation of the first aspect. The communication interface in the chip may be an input / output interface, a pin, or a circuit.

[0103] In the thirteenth aspect, an embodiment of the present application provides a computer program product comprising a computer program, which, when the computer program runs on a computer, enables the computer to execute the method described in the first aspect to the second aspect and any possible implementation method of the first aspect to the second aspect.

[0104] In one possible implementation, the chip or chip system described above in this application further includes at least one memory, in which instructions are stored. The memory may be a storage unit within the chip, such as a register, a cache, etc., or a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

[0105] It should be understood that the third, fifth and ninth aspects of the present application correspond to the technical solution of the first aspect of the present application, the fourth, sixth and tenth aspects of the present application correspond to the technical solution of the second aspect of the present application, and the seventh, eighth, and eleventh to thirteenth aspects of the present application correspond to the technical solutions of the first and second aspects of the present application. The beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] FIG1 is a schematic diagram of the architecture of a communication system 100 used in an embodiment of the present application;

[0107] FIG2 is a diagram exemplarily illustrating signaling interactions between a terminal device and each network device in a CHO process 200;

[0108] FIG3 is a diagram exemplarily illustrating signaling interactions between a terminal device and each network device in an LTM process 300;

[0109] FIG4 is a schematic flowchart of a method 400 for processing candidate primary cell configuration information provided by an embodiment of the present application, shown from the perspective of device interaction;

[0110] FIG5 is a diagram illustrating, from the perspective of device interaction, a signaling interaction between a terminal device and each network device when a CHO primary cell change occurs and a decision is made by the original primary cell network device in a method 500 for processing candidate primary cell configuration information provided by an embodiment of the present application;

[0111] 6 is a diagram illustrating signaling interactions between a terminal device and various network devices when a CHO primary cell change occurs and the decision is made by the terminal device in a method 600 for processing candidate primary cell configuration information provided in an embodiment of the present application from the perspective of device interaction;

[0112] FIG7 is a schematic block diagram of a device 7000 for processing candidate primary cell configuration information provided in an embodiment of the present application;

[0113] FIG8 is a schematic diagram of a possible structure of a terminal device 8000 provided in an embodiment of the present application;

[0114] FIG9 is a schematic diagram of a possible structure of an original primary cell network device provided in an embodiment of the present application, for example, a schematic diagram of the structure of a base station 9000 . DETAILED DESCRIPTION

[0115] To facilitate understanding of the method, device, storage medium, and product for processing candidate primary cell configuration information provided in the embodiments of the present application, the method for processing candidate primary cell configuration information, its system architecture, and application scenarios provided in the embodiments of the present application are described below. It is understood that the system architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application.

[0116] The technical solutions of the embodiments of the present application can be applied to communication scenarios in various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, future fifth generation (5G) communication system or new radio access technology (NR), vehicle-to-X (V2X), where V2X may include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), etc., Long Term Evolution-Vehicle (LTE-V), Internet of Vehicles, machine type communication (MTC), etc. communication (MTC), Internet of Things (IoT), Long Term Evolution-Machine (LTE-M), Machine to Machine (M2M), etc.

[0117] Furthermore, the present application can be applied to a variety of specific communication scenarios, such as point-to-point transmission between base stations and terminals or between terminals, multi-hop transmission between base stations and terminals, dual connectivity (DC) or multi-connection scenarios of multiple base stations and terminals. It should be noted that the above specific communication application scenarios are only examples and do not create limitations. Specifically, it can be applied to scenarios where LTM switching and CHO coexistence can be adopted in the above-mentioned specific communication scenarios.

[0118] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail in conjunction with Figure 1. Figure 1 is a schematic diagram of the architecture of a communication system 100 applied in the embodiments of the present application. As shown in Figure 1, the communication system 100 may include at least one terminal device, such as the terminal device 110 shown in Figure 1. The communication system 100 may also include at least one primary cell network device, such as the original primary cell network device 120 shown in Figure 1. The terminal device 110 may be mobile or fixed. The original primary cell network device 120 is a device that can communicate with the terminal device 110 via a wireless link, such as a base station or a base station controller. The original primary cell network device 120 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area (cell).

[0119] FIG1 exemplarily shows a terminal device and a primary cell network device. Optionally, when the terminal device is in a single-connection state, the communication system 100 may include at least one primary cell network device, which may be understood as a cell network device. Optionally, when the terminal device is in a dual-connection state, the communication system 100 may include at least one primary cell network device and may also include at least one primary and secondary cell network device. The coverage of the primary and secondary cell network devices may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

[0120] Each of the above-mentioned communication devices, such as the terminal device 110 and the original primary cell network device 120 in Figure 1, can be configured with multiple antennas. The multiple antennas may include at least one transmitting antenna for sending signals and at least one receiving antenna for receiving signals. In addition, each communication device also additionally includes a transmitter chain and a receiver chain. Those skilled in the art will understand that they may include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, demodulators, demultiplexers or antennas, etc.). Therefore, the primary cell network device and the terminal device can communicate through multi-antenna technology.

[0121] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, but the embodiments of the present application are not limited thereto.

[0122] In the embodiment of the present application, the network device can be any device with wireless transceiver function. The device includes, but is not limited to, an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a Home Evolved NodeB (HNB), a Base Band Unit (BBU), an Access Point (AP) in a Wireless Fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It can also be a next generation Node B (gNB) in a 5G, such as NR, system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DPU). unit, DU) etc.

[0123] In some deployments, a gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some gNB functions, while the DU implements some gNB functions. For example, the CU is responsible for processing non-real-time protocols and services, and implementing radio resource control (RRC) and packet data convergence protocol (PDCP) layer functions. The DU is responsible for processing physical layer protocols and real-time services, and implementing radio link control (RLC), media access control (MAC), and physical (PHY) layer functions. The AAU implements some physical layer processing functions, RF processing, and active antenna-related functions. Because RRC layer information ultimately becomes PHY layer information, or is converted from PHY layer information, in this architecture, higher-layer signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or by both the DU and the AAU. It is understood that the primary cell network device can be a device that includes one or more of the following: a CU node, a DU node, or an AAU node. In addition, the CU may be classified as a network device in an access network (radio access network, RAN), or the CU may be classified as a network device in a core network (core network, CN), which is not limited in this application.

[0124] Network equipment provides services for cells, and terminal devices communicate with cells through transmission resources allocated by the network equipment (for example, frequency domain resources, or spectrum resources). The cell can belong to a macro base station (for example, a macro eNB or macro gNB), or to a base station corresponding to a small cell. Small cells here can include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0125] In an embodiment of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile communication network (PLMN), etc.

[0126] Wearable devices, also known as wearable smart devices, are a general term for wearable devices that use wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include those that are fully functional, large in size, and can achieve full or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0127] Furthermore, the terminal device can also be a terminal device in the Internet of Things (IoT) system. IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people, machines, and things.

[0128] This application does not limit the specific form of the terminal device.

[0129] To facilitate a clear description of the technical solutions of the embodiments of the present application, some of the terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0130] 1. CHO primary cell change is the process of switching from the current CHO primary cell to a CHO candidate primary cell when the terminal device is triggered by changes in service conditions or channel quality. The process of switching from the current CHO primary cell to a CHO candidate primary cell can be referred to as the CHO process.

[0131] Figure 2 is a diagram exemplarily illustrating signaling interactions between a terminal device and various network devices in a CHO process 200. The CHO process 200 will be briefly described below with reference to Figure 2. The CHO process 200 may specifically include S201 to S209 below.

[0132] S201. The terminal device sends measurement results to the original primary cell network device.

[0133] S202: The original primary cell network device determines to execute CHO.

[0134] The original primary cell network device determines whether to perform CHO based on the measurement result.

[0135] S203: The original primary cell network device sends a CHO handover request to the candidate primary cell network device.

[0136] The candidate primary cells include the target primary cell and the potential target primary cell.

[0137] S204: The candidate primary cell network device sends a CHO handover request response to the original primary cell network device.

[0138] S204 enables the original primary cell network device to obtain the CHO candidate primary cell configuration information and execution conditions.

[0139] It should be understood that when the terminal device is in a dual-connection state, the primary cell is a cell that is different from the primary and secondary cells, and therefore the CHO candidate primary cell configuration information is the configuration information of the CHO candidate primary cell. It should also be understood that when the terminal device is in a single-connection state, the primary cell and the cell are the same concept, and therefore the CHO candidate primary cell is the CHO candidate cell, and the CHO candidate primary cell configuration information is the configuration information of the CHO candidate cell. Correspondingly, the original primary cell network device is the original cell network device, the candidate primary cell network device is the candidate cell network device, the target primary cell to be determined subsequently is the target cell, and the target primary cell network device is the target cell network device.

[0140] It should also be understood that this execution condition is a CHO execution condition, which can be any one of Event A3, Event A4, and Event A5, or any two of Event A3, Event A4, and Event A5, or Event A3, Event A4, and Event A5. Event A3 is when the quality of the neighboring cell is better than that of the original cell; this event triggers a handover. Event A4 is when the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover. Event A5 is when the quality of the original cell is less than an absolute threshold and the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover.

[0141] S205. The original primary cell network device sends an RRC reconfiguration message to the terminal device.

[0142] Among them, S205 is to send the CHO candidate primary cell configuration information and execution conditions to the terminal device.

[0143] S206. The terminal device sends an RRC reconfiguration completion message to the original primary cell network device.

[0144] S207. The terminal device performs CHO evaluation.

[0145] It should be understood that the terminal device performs CHO evaluation based on the CHO candidate primary cell configuration information and execution conditions to determine the target primary cell.

[0146] S208. The terminal device disconnects from the original primary cell network device.

[0147] S209. The terminal device is connected to the target primary cell network device.

[0148] At this point, the CHO process is completed.

[0149] 2. Layer 1 / 2 triggered mobility: also known as LTM, is the process in which the original primary cell network equipment performs cell handover for the terminal device based on the L1 measurement results reported by the terminal device and the terminal device's support capability for LTM when the terminal device is in a connected state.

[0150] Figure 3 is a diagram exemplarily illustrating signaling interactions between a terminal device and various network devices in an LTM process 300. The LTM process 300 is briefly described below with reference to Figure 3. The LTM process 300 may specifically include S301 to S312 below.

[0151] S301. The terminal device sends L1 measurement results to the original primary cell network device.

[0152] S302: The original primary cell network device determines to perform LTM switching.

[0153] S303: The original primary cell network device sends an LTM handover request to the candidate primary cell network device.

[0154] The candidate primary cells include the target primary cell and the potential target primary cell.

[0155] S304: The candidate primary cell network device sends an LTM handover request response to the original primary cell network device.

[0156] Among them, S304 is to enable the original primary cell network device to obtain the LTM candidate primary cell configuration information. It should be understood that when the terminal device is in a dual-connection state, the primary cell is a cell that is different from the primary and secondary cells, and therefore the LTM candidate primary cell configuration information is the configuration information of the LTM candidate primary cell. It should also be understood that when the terminal device is in a single-connection state, the primary cell and the cell are the same concept, and therefore the LTM candidate primary cell is the LTM candidate cell, and the LTM candidate primary cell configuration information is the configuration information of the LTM candidate cell. Correspondingly, the original primary cell network device is the original cell network device, the candidate primary cell network device is the candidate cell network device, the target primary cell to be determined subsequently is the target cell, and the target primary cell network device is the target cell network device.

[0157] S305. The original primary cell network device sends an RRC reconfiguration message to the terminal device.

[0158] The RRC reconfiguration message includes the LTM candidate primary cell configuration information. The RRC reconfiguration message is used to instruct the terminal device to perform an uplink synchronization process and a downlink synchronization process on the candidate primary cell.

[0159] S306. The terminal device sends an RRC reconfiguration completion message to the original primary cell network device.

[0160] S307. The terminal device performs a downlink synchronization process for the candidate primary cell.

[0161] S308. The terminal device performs an uplink synchronization process for the candidate primary cell.

[0162] S309. The terminal device sends the L1 measurement result to the original primary cell network device.

[0163] Among them, S309 is to enable the original primary cell network device to determine the target primary cell.

[0164] S310: The original primary cell network device sends an LTM switching instruction to the terminal device.

[0165] Among them, the LTM switching instruction may include medium access control (MAC) control element (CE) indication information, and the MAC CE indication information may include: timing advance (TA), transmission configuration indication state (TCI State) sequence number (IDentity, ID), contention free random access (CFRA) resource information, and LTM candidate primary cell configuration information identifier.

[0166] It should be understood that when the TA is valid, its specific value will be included in the MAC CE indication information, and when it is invalid, it will not be included in the MAC CE indication information.

[0167] It should also be understood that during the process of performing uplink synchronization for each candidate primary cell network device, if the RRC reconfiguration message indicates that the terminal device is to measure the TA itself, then it measures the timing advance of the original primary cell network device and determines the timing advance of the candidate primary cell network device based on the reception time difference between the original primary cell network device and the candidate primary cell network device; or, the original primary cell network device triggers contention-free random access through a physical downlink control channel command (Physical Downlink Control Channel, PDCCH) order to obtain the timing advance of the candidate primary cell network device, and the terminal device initiates CFRA to the candidate primary cell network device to obtain the timing advance of the candidate primary cell network device, and then the original primary cell network device determines the validity of the timing advance.

[0168] It should also be understood that if the MAC CE indication information includes a specific value of the TA, the terminal device can achieve switching by sending an uplink signaling or an uplink data packet or other uplink information to the target cell network device. The specific sending content is not limited in this application. If the MAC CE indication information does not include a specific value of the TA, the terminal device can measure the TA corresponding to the target cell network device on its own, and can send an uplink signaling or an uplink data packet or other uplink information to the target cell network device based on the measurement result to achieve switching. The specific sending content is not limited in this application.

[0169] S311. The terminal device disconnects from the original primary cell network device.

[0170] S312: The terminal device executes a random access process to complete the LTM switching.

[0171] 3. Release: When the terminal device supports both CHO and LTM, it is necessary to configure both LTM candidate primary cell configuration information and CHO candidate primary cell configuration information. When the CHO process is triggered, in order to reduce the operating load of the terminal device, it is hoped that the terminal device can cancel the LTM candidate primary cell configuration information, that is, release the LTM candidate primary cell configuration information.

[0172] 4. Retention: When a terminal device supports both CHO and LTM, it must configure both LTM candidate primary cell configuration information and CHO candidate primary cell configuration information. When the LTM process may be triggered later, in order to reduce the latency caused by resending the LTM candidate primary cell configuration information, it is desirable for the terminal device to continue to store the LTM candidate primary cell configuration information, i.e., retain the LTM candidate primary cell configuration information. It should be understood that retention and storage in the embodiments of the present application are synonymous.

[0173] It should be understood that the same candidate primary cell can be used as both a CHO candidate primary cell and an LTM candidate primary cell; some candidate primary cells can be used only as CHO candidate primary cells, and another part of the candidate primary cells can be used only as LTM candidate primary cells; it should also be understood that in the same CHO process, the release or retention of different LTM candidate primary cell configuration information can be the same or different, and this application does not limit this.

[0174] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0175] To facilitate understanding of the embodiments of the present application, the following description is first made:

[0176] First, to clearly describe the technical solutions of the embodiments of this application, the embodiments of this application use terms such as "first" and "second" to distinguish between identical or similar items with substantially identical functions and effects. For example, the first retention indication information and the second retention indication information are merely used to distinguish between different retention indication information and do not limit their order. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and do not necessarily indicate differences.

[0177] Second, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0178] Third, in the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, a--c, bc, or abc, where a, b, c can be single or multiple.

[0179] Fourth, in the embodiments of the present application, "when", "if" and "if" all mean that the device will perform corresponding processing under certain objective circumstances, which does not limit the time, nor does it require that the device must perform a judgment action when it is implemented, nor does it mean that there are other limitations.

[0180] Fifth, the "simultaneously" in the embodiments of the present application can be understood as at the same time point, or within a period of time, or within the same cycle, and can be understood specifically in conjunction with the context.

[0181] Sixth, in each embodiment of the present application, "A corresponds to B" means that B is associated with A. "Executing B according to A" does not mean executing B only according to A, but B can also be executed according to A and / or other information.

[0182] Seventh, "predefinition" or "preconfiguration" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device). This application does not limit its specific implementation method. Among them, "saving" can mean saving in one or more memories. One or more memories can be set separately or integrated in an encoder or decoder, a processor, or a communication device. One or more memories can also be partially set separately and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, which is not limited by this application.

[0183] The predefined in this application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0184] Eighth, in the embodiment of the present application, "used for indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein the other information and the information to be indicated have an association relationship. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to use a pre-agreement (such as a protocol provision) on whether a certain information element exists to implement the indication of the information to be indicated, thereby reducing the indication overhead to a certain extent.

[0185] Ninth, the following describes various embodiments in detail with reference to various flowcharts. However, it should be understood that these flowcharts and the descriptions of the corresponding embodiments are provided for ease of understanding only and should not constitute any limitation on this application. Not every step in each flowchart is necessarily required; for example, some steps can be skipped. Furthermore, the order in which the steps are executed is not fixed and is not limited to that shown in the figures. The order in which the steps are executed should be determined by their functions and inherent logic.

[0186] In order to support both CHO and LTM cell switching mechanisms, terminal devices will inevitably configure CHO candidate primary cell configuration information and LTM candidate primary cell configuration information. Currently, a topic worthy of attention is how to properly process the LTM candidate primary cell configuration information during the CHO primary cell change for terminal devices that store both LTM candidate primary cell configuration information and CHO candidate primary cell configuration information. To this end, an embodiment of the present application provides a method for processing candidate primary cell configuration information, the main inventive ideas of which are as follows:

[0187] To effectively process LTM candidate primary cell configuration information, the original primary cell network device uses instruction information to indicate the processing strategy for LTM candidate primary cell configuration information. When the terminal device determines to change the CHO primary cell, it can automatically retain or release the LTM candidate primary cell configuration information based on the processing strategy. This achieves effective management of LTM candidate primary cell configuration information.

[0188] The method provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0189] It should be understood that the following description is only for ease of understanding and explanation, and the method provided in the embodiment of the present application is described in detail using the interaction between a terminal device and a network device as an example. However, this does not constitute any limitation on the execution subject of the method provided in the present application. For example, the terminal device shown in the embodiment below can be replaced by a component (such as a chip or circuit) configured in the terminal device. The network device shown in the embodiment below can also be replaced by a component (such as a chip or circuit) configured in the network device.

[0190] The embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided in the embodiments of the present application. As long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application, for example, the execution subject of the method provided in the embodiments of the present application can be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

[0191] FIG4 is a schematic flow chart of a method 400 for processing candidate primary cell configuration information provided by an embodiment of the present application from the perspective of device interaction. As shown in FIG4 , the method for processing candidate primary cell configuration information includes:

[0192] S410. The original primary cell network device sends first indication information to the terminal device.

[0193] It should be understood that the specific forms of the original primary cell network equipment and terminal equipment can refer to the above-mentioned relevant descriptions and will not be repeated here.

[0194] The first indication information is described in detail below.

[0195] The first indication information is used to indicate a processing strategy for the mobility LTM candidate primary cell configuration information triggered by the 1st / 2nd layer when a CHO primary cell change occurs in the terminal device.

[0196] Optionally, the LTM candidate primary cell configuration information may be the configuration information of an LTM candidate primary cell that is not a CHO candidate primary cell; or, the LTM candidate primary cell configuration information may also be the configuration information of an LTM candidate primary cell that is not a CHO target primary cell when a CHO primary cell change occurs in the terminal device.

[0197] It should be understood that the CHO primary cell change indicated in the above-mentioned first indication information is a situation where, when the terminal device has LTM candidate primary cell configuration information, it is evaluated that at least one CHO candidate primary cell meets the corresponding execution conditions and it is determined to execute the CHO primary cell change.

[0198] Therefore, in order to adapt to the situation where the terminal device has LTM candidate primary cell configuration information and evaluates that at least one CHO candidate primary cell meets the corresponding execution conditions and determines to execute the CHO primary cell change, the terminal device needs to have LTM candidate primary cell configuration information, evaluate whether there is at least one CHO candidate primary cell that meets the corresponding execution conditions, determine the CHO target primary cell according to the evaluation result, and determine to execute the CHO primary cell change.

[0199] It should be understood that the LTM candidate primary cell configuration information can be sent to the terminal device by the original primary cell network device together with the first indication information via radio resource control (RRC) reconfiguration information; it can also be sent to the terminal device by the original primary cell network device before sending the first indication information via radio resource control (RRC) reconfiguration information. It should also be understood that the specific process of the terminal device evaluating whether at least one CHO candidate primary cell meets the corresponding execution conditions, as well as the process of determining to execute the CHO primary cell change, can refer to relevant technologies and will not be repeated here.

[0200] The following describes in detail the strategy for processing the LTM candidate primary cell configuration information when the CHO primary cell of a terminal device changes:

[0201] It should be understood that the processing strategy for the LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device may be a strategy that includes at least one processing method, which is a retention method, a release method, and an autonomous processing method. Among them, the retention method is a processing method for retaining the LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device. Then, on the contrary, the release method is a processing method for releasing the LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device. The release method can be divided into two release methods: release during execution and release upon successful execution. Among them, release during execution refers to release when the CHO primary cell change has been triggered; release upon successful execution refers to release when the CHO primary cell change has been successfully executed. The autonomous processing method is a processing method in which the terminal device autonomously determines whether to retain or release the LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device. The types of processing methods included in the processing strategy for the LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device listed above are only examples and should not constitute any limitation to this application.

[0202] It should also be understood that the devices used to control the above-mentioned different processing modes in this embodiment can be the same device. For example, the devices controlling the reservation mode and the release mode are both the original primary cell network device. The devices used to control the above-mentioned different processing modes in this embodiment can also be different devices. For example, the devices controlling the reservation mode and the release mode are the original primary cell network device, and the device controlling the autonomous processing mode is the terminal device.

[0203] It should be noted that the embodiment of the present application does not specifically limit the manner in which the first indication information indicates "a processing strategy for LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device". The manner in which the first indication information indicates "a processing strategy for LTM candidate primary cell configuration information when a CHO primary cell change occurs in a terminal device" is described below:

[0204] In one example, the first indication information may include information about a device controlling the processing method, as well as information required for the device controlling the processing method to instruct the terminal device to process the LTM candidate primary cell configuration information when a CHO primary cell change occurs. This approach can more clearly indicate the processing strategy for the LTM candidate primary cell configuration information.

[0205] In another example, the first indication information may include only the information required by the device controlling the processing mode to instruct the terminal device to process the LTM candidate primary cell configuration information when a CHO primary cell change occurs. Because different devices controlling the processing mode require different information for processing, the device controlling the processing mode and the specific processing strategy can be determined based on the type of information required for processing. This approach can effectively save transmission resources.

[0206] In another example, if the device controlling the processing mode is the original primary cell network device, the first indication information may include only the information required for processing. If the device controlling the processing mode is a terminal device, the first indication information may include both the device information controlling the processing mode and the information required for processing. Conversely, in another example, if the device controlling the processing mode is the original primary cell network device, the first indication information may include both the device information controlling the processing mode and the information required for processing. If the device controlling the processing mode is a terminal device, the first indication information may include only the information required for processing. These two methods can make the first indication information more flexible.

[0207] The information required for processing may vary depending on the device controlling the processing mode. For example, when the device controlling the processing mode is the original primary cell network device, the information required for processing may include processing strategy information or other information for the LTM candidate primary cell configuration information. When the device controlling the processing mode is a terminal device, the information required for processing may include autonomous processing information or other information for the LTM candidate primary cell configuration information.

[0208] It should be understood that the above-mentioned processing strategy information may include retention strategy information. The retention strategy information is used to indicate that when a CHO primary cell changes, the processing strategy for the LTM candidate primary cell configuration information is a retention strategy. Conversely, the above-mentioned processing strategy information may include release strategy information. The release strategy information is used to indicate that when a CHO primary cell changes, the processing strategy for the LTM candidate primary cell configuration information is a release strategy.

[0209] It should be noted that, for the first indication information when the device controlling the processing method is the original primary cell network device, the embodiment of the present application does not limit the specific method of how to use the first indication information to instruct the terminal device to perform the processing strategy for the LTM candidate primary cell configuration information when the CHO primary cell changes.

[0210] Therefore, the embodiments of the present application do not limit the specific manner in which the original primary cell network device instructs the terminal device, through the first indication information, to process the LTM candidate primary cell configuration information when a CHO primary cell change occurs. In other words, the specific manner in which the LTM candidate primary cell configuration information processing strategy is processed when a CHO primary cell change occurs in the terminal device listed above is merely an example and should not constitute any limitation to the present application.

[0211] The transmission method of the indication information is not limited in this embodiment.

[0212] In one example, the first indication information may be carried in radio resource control RRC reconfiguration information.

[0213] Specifically, when the LTM candidate primary cell configuration information and CHO configuration information are sent to the terminal device via an RRC reconfiguration message, they may be sent together with the first indication information. In this case, the first indication information may be a predefined field in the RRC reconfiguration message. The CHO configuration information includes CHO candidate primary cell configuration information and execution conditions, and there may be one or more CHO candidate primary cells.

[0214] For another example, the first indication information may be carried in the CHO candidate primary cell configuration information, and the LTM candidate primary cell configuration information, the CHO candidate primary cell configuration information carrying the first indication information, and the execution condition may be carried in the RRC reconfiguration information. Specifically, the first indication information may be associated with the corresponding CHO candidate primary cell configuration information and stored, and the first indication information may be indicated by a predefined field in the CHO candidate primary cell configuration information. The CHO candidate primary cell configuration information may then be indicated by a defined field in the RRC reconfiguration information.

[0215] It should be understood that the execution condition of the above-mentioned CHO candidate primary cell can be any one of Event A3, Event A4, and Event A5, or any two of Event A3, Event A4, and Event A5, or Event A3, Event A4, and Event A5. Among them, Event A3 is that the quality of the neighboring cell is better than that of the original cell, and the occurrence of this event will trigger a handover. Event A4 is that the quality of the neighboring cell is greater than an absolute threshold, and the occurrence of this event will trigger a handover. Event A5 is that the quality of the original cell is less than an absolute threshold, and the quality of the neighboring cell is greater than an absolute threshold, and the occurrence of this event will trigger a handover.

[0216] It should also be understood that in the above examples, the execution conditions adopted by different CHO candidate primary cells may be the same or different, and this application does not limit this.

[0217] In another example, the first indication information can be carried in dedicated signaling. That is, in embodiments of the present application, the first indication information can be sent to the terminal device as an independent signaling message via the original primary cell network device, and sent to the terminal device simultaneously with the RRC reconfiguration message, thereby improving the parsing speed of the indication information. The "simultaneous transmission" can refer to a specific time point or a specific time period, which is not limited in this application.

[0218] S420: Reserve or release the LTM candidate primary cell configuration information according to the first indication information.

[0219] It should be understood that the terminal device's execution of retaining or releasing the LTM candidate primary cell configuration information based on the first indication information is premised on the following: the terminal device has performed a CHO evaluation, determined a CHO target primary cell based on the evaluation results, and determined to execute a CHO primary cell change. The CHO target primary cell is the CHO candidate primary cell to which the terminal device is about to change. The following briefly describes the steps for determining to execute a CHO primary cell change.

[0220] The terminal device receives the RRC reconfiguration information sent by the original primary cell network device, and performs a CHO evaluation based on the CHO candidate primary cell configuration information and execution conditions carried in the RRC reconfiguration information. For example, the terminal device evaluates whether the quality of at least one CHO candidate primary cell is better than the original primary cell. If so, it determines to perform a CHO primary cell change. Alternatively, the terminal device evaluates whether the quality of at least one CHO candidate primary cell is greater than an absolute threshold. If so, it determines to perform a CHO primary cell change. Alternatively, the terminal device evaluates whether the quality of at least one CHO candidate primary cell is greater than an absolute threshold and the quality of the original primary cell is less than another absolute threshold. If so, it determines to perform a CHO primary cell change.

[0221] It should be understood that the execution conditions corresponding to different CHO candidate primary cells may be the same or different, and the execution conditions corresponding to the same CHO candidate primary cell may be one or more. Therefore, different CHO candidate primary cells may correspond to different evaluation processes, and the embodiments of the present application do not make specific limitations on this.

[0222] Therefore, in the method for processing candidate primary cell configuration information provided in the embodiments of the present application, the original primary cell network device indicates a processing strategy for the LTM candidate primary cell configuration information through indication information, so that when the terminal device determines to change the CHO primary cell, the terminal device can automatically retain or release the LTM candidate primary cell configuration information according to the processing strategy. This achieves effective management of the LTM candidate primary cell configuration information.

[0223] It should be noted that when the terminal device determines to change the CHO primary cell, it can automatically retain or release the LTM candidate primary cell configuration information according to the processing strategy, without having to always save the LTM candidate primary cell configuration information or always release the LTM candidate primary cell configuration information. It can release the LTM candidate primary cell configuration information when it is not necessary to retain it to reduce the load of the terminal device, and retain the LTM candidate primary cell configuration information when it is necessary to retain it to avoid waste of resources caused by repeated sending of the LTM candidate primary cell configuration information.

[0224] It should be understood that based on the different devices that control the processing mode, the information included in the first indication information is also different, and the specific schemes for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information are also different. Therefore, the first indication information when the device that controls the processing mode is the original primary cell network device and the terminal device, as well as the specific schemes for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information are introduced below. Among them, when the device that controls the processing mode is the original primary cell network device, the corresponding method for processing the candidate primary cell configuration information is scheme one; when the device that controls the processing mode is the terminal device, the corresponding method for processing the candidate primary cell configuration information is scheme two.

[0225] Option 1:

[0226] When the device controlling the processing mode is the original primary cell network device, the first indication information sent by the original primary cell network device to the terminal device includes at least one of the following information:

[0227] (1) Private indication information for releasing or retaining the LTM candidate primary cell configuration information corresponding to each CHO candidate primary cell configuration information.

[0228] (2) Public indication information for releasing or retaining LTM candidate primary cell configuration information corresponding to configuration information of at least one CHO candidate primary cell set, where the configuration information of the CHO candidate primary cell set includes at least one CHO candidate primary cell configuration information.

[0229] (3) Release timing indication information: The release timing indication information is used to indicate that the configuration information of the LTM candidate primary cell should be released after the CHO primary cell change is successfully completed.

[0230] The following describes each of these:

[0231] (1) The private indication information is the first release indication information or the first retention indication information.

[0232] It should be understood that each CHO candidate primary cell configuration information corresponds to a private indication information. The private indication information is first release indication information or first retention indication information. The first release indication information is information for releasing the LTM candidate primary cell configuration information corresponding to the CHO candidate primary cell configuration information, and the first retention indication information is information for retaining the LTM candidate primary cell configuration information corresponding to the CHO candidate primary cell configuration information.

[0233] It should also be understood that the CHO candidate primary cell configuration information refers to the configuration information of a CHO candidate primary cell, and the configuration information of the CHO candidate primary cell may include a CHO candidate primary cell identifier, a maximum number of users of the CHO candidate primary cell, a transmit power of the CHO candidate primary cell, etc. The above-mentioned CHO candidate primary cell identifier is an identifier indicating the identity of the CHO candidate primary cell, for example, it can be the name of the CHO candidate primary cell, or it can be numbers, letters or other information that characterize the identity of the CHO candidate primary cell, and this application is not limited to this.

[0234] Therefore, each CHO candidate primary cell can be associated with a corresponding private indication information. That is, the private indication information is indication information per CHO candidate primary cell. In other words, one CHO candidate primary cell configuration information can correspond to one first release indication information or one first retention indication information, and the private indication information types corresponding to multiple CHO candidate primary cell configuration information can be the same or different.

[0235] It should be noted that the transmission method of the first indication information in the scheme below, as described above, can be carried in the radio resource control RRC reconfiguration information or proprietary signaling. In the case where the proprietary indication information is carried in the radio resource control RRC reconfiguration information, each proprietary indication information can be carried in the corresponding CHO candidate primary cell configuration information in the radio resource control RRC reconfiguration information.

[0236] It should be understood that each private indication information corresponds to a CHO candidate primary cell configuration information, so the original primary cell network device can carry each private indication information in the corresponding CHO candidate primary cell configuration information, and carry the LTM candidate primary cell configuration information and all CHO candidate primary cell configuration information carrying the corresponding private indication information and the execution conditions in the RRC reconfiguration information. Specifically, the original primary cell network device can associate each private indication information with the corresponding CHO candidate primary cell configuration information to indicate the private indication information through a predefined field in the corresponding CHO candidate primary cell configuration information, and then indicate the CHO candidate primary cell configuration information through a defined field in the RRC reconfiguration information. This carrying method can achieve more refined management of the LTM primary cell configuration information.

[0237] Therefore, embodiments of the present application can associate a corresponding private indication information with each CHO candidate primary cell. It should be understood that the type of private indication information associated with different CHO candidate primary cells can be the same or different. Therefore, for situations where different CHO candidate primary cells serve as CHO target primary cells, the processing strategies for LTM primary cell configuration information when a CHO primary cell change occurs for terminal devices indicated by the private indication information corresponding to each of the different CHO candidate primary cells can also be the same or different. Therefore, by associating a corresponding private indication information with each CHO candidate primary cell and using the private indication information for transmission, more refined management of LTM primary cell configuration information can be achieved.

[0238] (2) The public indication information is the second release indication information or the second retention indication information.

[0239] It should be understood that each CHO candidate primary cell set configuration information corresponds to a piece of public indication information. The public indication information is second release indication information or second retention indication information. The second release indication information is information for releasing the LTM candidate primary cell configuration information corresponding to all CHO candidate primary cell configuration information in the configuration information of a CHO candidate primary cell set, and the second retention indication information is information for retaining the LTM candidate primary cell configuration information corresponding to all CHO candidate primary cell configuration information in the configuration information of a CHO candidate primary cell set.

[0240] Therefore, the configuration information of each CHO candidate primary cell set can be associated with a corresponding public indication information. That is, the public indication information is indication information per CHO candidate primary cell set. In other words, the configuration information of one CHO candidate primary cell set corresponds to one second release indication information or one second retention indication information, and the configuration information of different CHO candidate primary cell sets corresponds to different types of public indication information.

[0241] It should be noted that when the first indication information includes public indication information and does not include private indication information, there is public indication information corresponding to the configuration information of at least one CHO candidate primary cell set, and the configuration information of the CHO candidate primary cell set includes at least one CHO candidate primary cell configuration information. The content of the CHO candidate primary cell configuration information is as described above and will not be repeated here. Therefore, the configuration information of the CHO candidate primary cell set may include the configuration information of the first CHO candidate primary cell set and / or the configuration information of the second CHO candidate primary cell set. It should be understood that the configuration information of the first CHO candidate primary cell set has a first mapping relationship with the public indication information for releasing the LTM candidate primary cell configuration information; and / or, the configuration information of the second CHO candidate primary cell set has a second mapping relationship with the public indication information for retaining the LTM candidate primary cell configuration information.

[0242] It should be understood that both the first mapping relationship and the second mapping relationship can be a one-to-one mapping relationship, or can be other mapping relationships such as a many-to-one mapping relationship, and this embodiment does not specifically limit this. It should also be understood that this embodiment of the application does not specifically limit in which CHO candidate primary cell set the configuration information of each CHO candidate primary cell is located.

[0243] In one example, part of all CHO candidate primary cell configuration information may be in the configuration information of the first CHO candidate primary cell set, and another part of all CHO candidate primary cell configuration information may be in the configuration information of the second CHO candidate primary cell set. In another example, all CHO candidate primary cell configuration information may be in the configuration information of the first CHO candidate primary cell set. In yet another example, all CHO candidate primary cell configuration information may be in the configuration information of the second CHO candidate primary cell set.

[0244] In other words, when the first indication information only includes the second release indication information, all CHO candidate primary cell configuration information is located in the configuration information of the first CHO candidate primary cell set; alternatively, when the first indication information only includes the second retention indication information, all CHO candidate primary cell configuration information is located in the configuration information of the second CHO candidate primary cell set. Alternatively, when the first indication information includes the second release indication information and the second retention indication information, part of all CHO candidate primary cell configuration information may be located in the configuration information of the first CHO candidate primary cell set, and another part of all CHO candidate primary cell configuration information may be located in the configuration information of the second CHO candidate primary cell set.

[0245] Therefore, the second release indication information and / or the second retention indication information can be associated with the same first indication information for multiple CHO candidate primary cells. That is, when any one of the multiple CHO candidate primary cells is used as the CHO target primary cell, the public indication information associated with the configuration information of the set to which it belongs is the same. Then, for different CHO target primary cells, the public indication information associated with the configuration information of the set to which it belongs can be the same. Therefore, based on associating a corresponding public indication information with the configuration information of a CHO candidate primary cell set and adopting the public indication information for transmission, a unified first indication information can be transmitted. When the number of CHO candidate primary cells included in the configuration information of the CHO candidate primary cell set is greater, the number of public indication information required to be transmitted is smaller, which can effectively save transmission resources.

[0246] (3) Release timing indication information:

[0247] It should be understood that the release timing indication information is used to indicate the release of the LTM candidate primary cell configuration information after the CHO primary cell change is successfully completed. It can also be used to indicate the release of the LTM candidate primary cell configuration information under other conditions. The embodiments of the present application do not specifically limit the release time indicated by the release timing indication information.

[0248] It should also be understood that the release timing indication information may be a field representing the “release timing”, or may be numbers, letters or other information representing the “release timing”, and this application does not limit this.

[0249] It should be noted that the release timing indication information can be of any of the following types: conditional release timing indication information or unconditional release timing indication information. For example, conditional release timing indication information is identified by "A," and unconditional release timing indication information is identified by "B." For conditional release timing indication information, the digits "0" and "1" can be used to distinguish whether each first release indication information is associated with the release timing indication information. That is, release timing indication information associated with the first release indication information may indicate that the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed. Alternatively, release timing indication information not associated with the first release indication information may indicate that the LTM candidate primary cell configuration information is released after the CHO primary cell change is triggered. Similarly, release timing indication information associated with the second release indication information may indicate that the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed. Alternatively, release timing indication information not associated with the second release indication information may indicate that the LTM candidate primary cell configuration information is released after the CHO primary cell change is triggered.

[0250] Therefore, different first release indication information based on CHO candidate primary cells can be selectively partially or completely associated with the release timing indication information. In one example, there are four CHO candidate primary cells. When the release timing indication information is conditional release timing indication information, if the second and fourth of the four CHO candidate primary cells are associated with the release timing indication information, the release timing indication information can be represented as A0101; if all of the four CHO candidate primary cells are associated with the release timing indication information, the release timing indication information can be represented as A1111; and when the release timing indication information is unconditional release timing indication information, the release timing indication information can be represented as B. It should be understood that the information indicated by "A1111" and "B" has the same effect.

[0251] It should be understood that if the first or third CHO candidate primary cell among the four CHO candidate primary cells is used as the CHO target primary cell, the LTM candidate primary cell configuration information will be released after the CHO primary cell change is triggered; if the second or fourth CHO candidate primary cell among the four CHO candidate primary cells is used as the CHO target primary cell, the LTM candidate primary cell configuration information will be released after the CHO primary cell change is successfully completed.

[0252] Accordingly, the second release indication information, which is based on a CHO candidate primary cell set, can be selectively associated with the release timing indication information in part or in whole. This embodiment does not specifically limit this. In one example, the number of CHO candidate primary cell sets corresponding to the second release indication information is one. When the release timing indication information is conditional release timing indication information, the release timing indication information can be represented as A&1; when the release timing indication information is unconditional release timing indication information, the release timing indication information can be represented as B. It should be understood that "A&1" and "B" have the same effect in indicating information. In another example, the number of CHO candidate primary cell sets corresponding to the second release indication information is two. When the release timing indication information is conditional release timing indication information, if the first CHO candidate primary cell set of the two CHO candidate primary cell sets is associated with the release timing indication information, the release timing indication information can be represented as "A&10."

[0253] It should be understood that if any CHO candidate primary cell in the first of the two CHO candidate primary cell sets is used as the CHO target primary cell, the LTM candidate primary cell configuration information will be released after the CHO primary cell change is successfully completed; if any CHO candidate primary cell in the second of the two CHO candidate primary cell sets is used as the CHO target primary cell, the LTM candidate primary cell configuration information will be released after the CHO primary cell change is triggered.

[0254] Therefore, the release timing indication information can be combined with the first release indication information and / or the second release indication information, so that the release timing can be optional and the content of the first indication information can be optional.

[0255] The above is a detailed description of the concepts of any of the first indication information related to "retention", "release", or "release timing". The following is a description of the form and formation process of any of the first indication information related to "retention", "release", or "release timing":

[0256] It should be understood that in order to realize the formation of any indication information related to "retention", "release" or "release timing", the original primary cell network device may establish an association between the first release indication information and / or the first retention indication information and the CHO candidate primary cell identifier in the CHO candidate primary cell configuration information in the first indication information formation process, or the original primary cell network device may establish an association between the second release indication information or the second retention indication information and the CHO candidate primary cell through the configuration information identifier of the CHO candidate primary cell set and the CHO candidate primary cell identifier in the first indication information formation process, or the original primary cell network device may establish an association between the release timing indication information and the CHO candidate primary cell through the CHO candidate primary cell identifier corresponding to the first release indication information and / or the configuration information identifier of the first CHO candidate primary cell set in the first indication information formation process.

[0257] Among them, any of the above-mentioned indication information related to "retention", "release" or "release timing" is information indicating the retention or release of the LTM candidate primary cell configuration information, for example, it can be a field of "retention", "release" or "release timing", or it can be a number, letter or other information representing "retention", "release" or "release timing", and this application does not limit this. Moreover, the above-mentioned CHO candidate primary cell identifier is an identifier indicating the identity of the CHO candidate primary cell, for example, it can be the name of the CHO candidate primary cell, or it can be a number, letter or other information representing the identity of the CHO candidate primary cell, and this application does not limit this. Moreover, the above-mentioned configuration information identifier of the CHO candidate primary cell set is an identifier indicating the identity of the CHO candidate primary cell set, for example, it can be the name of the CHO candidate primary cell set, or it can be a number, letter or other information representing the identity of the CHO candidate primary cell set, and this application does not limit this.

[0258] The above is a description of the form and formation process of any indication information related to "retention", "release" or "release timing". The following is a description of the processing strategy of LTM candidate primary cell configuration information:

[0259] In the first embodiment, the "processing strategy for LTM candidate primary cell configuration information" may be related to and / or unrelated to the CHO target cell. It should be understood that, based on the differences between the "release mode" and "retention mode" processing modes, as well as the differences in the release timings between the "release upon execution" and "release upon successful execution" release processing modes, when the "processing strategy for LTM candidate primary cell configuration information" is related to the CHO target cell, the "processing strategy for LTM candidate primary cell configuration information" provided in this embodiment may be any one or more of the following strategies: "retain the LTM candidate primary cell configuration information when the first condition is met," "release the LTM candidate primary cell configuration information when the second condition is met," and / or "release the LTM candidate primary cell configuration information when the third condition is met." It should also be understood that when the "processing strategy for LTM candidate primary cell configuration information" is not related to the CHO target cell, the "processing strategy for LTM candidate primary cell configuration information" provided in this embodiment can be any one or more of the following strategies: "When the fourth condition is met, the LTM candidate primary cell configuration information is retained", "When the fifth condition is met, the LTM candidate primary cell configuration information is released" and / or "When the sixth condition is met, the LTM candidate primary cell configuration information is released".

[0260] It should be noted that when the first indication information includes any one or more of private indication information, public indication information, or release timing indication information, the same or different "processing strategies for LTM candidate primary cell configuration information" may exist. In other words, any of the three "processing strategies for LTM candidate primary cell configuration information" is determined based on the specific content of the first indication information.

[0261] It should be understood that the content included in the first indication information may include any of the following situations:

[0262] Case 1: the first indication information includes private indication information.

[0263] Case 2: the first indication information includes public indication information.

[0264] Case 3: the first indication information includes private indication information and public indication information.

[0265] Case 4: the first indication information includes private indication information and release timing indication information.

[0266] Case 5: The first indication information includes public indication information and release timing indication information.

[0267] Case 6: the first indication information includes private indication information, public indication information and release timing indication information.

[0268] Therefore, below, when the "processing strategy for LTM candidate primary cell configuration information" is related to the CHO target primary cell, combined with the different situations of the content of the above first indication information, the three processing strategies of "retaining the LTM candidate primary cell configuration information when the first condition is met", "releasing the LTM candidate primary cell configuration information when the second condition is met", and "releasing the LTM candidate primary cell configuration information when the third condition is met" are introduced respectively.

[0269] When the first condition is met, the LTM candidate primary cell configuration information is retained, where the first condition includes at least one of the following conditions:

[0270] (1) The first indication information corresponding to the CHO target primary cell configuration information is private indication information for reserving the LTM candidate primary cell configuration information.

[0271] (2) The first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the public indication information for reserving the configuration information of the LTM candidate primary cell.

[0272] It should be noted that, in case 1 or 4, the first condition is: the first indication information corresponding to the CHO target primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information. In case 2 or 5, the first condition is: the first indication information having a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is public indication information for retaining the LTM candidate primary cell configuration information. In case 3 or 5, the first condition is: the first indication information corresponding to the CHO target primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information, and the first indication information having a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is public indication information for retaining the LTM candidate primary cell configuration information.

[0273] Accordingly, in case 1 or case 4, the strategy of "retaining the LTM candidate primary cell configuration information when the first condition is met" is: if the first indication information corresponding to the CHO target primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is retained.

[0274] In case 2 or case 5, the strategy of "retaining the configuration information of the LTM candidate primary cell when the first condition is met" is: if the first indication information that has a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the public indication information for retaining the configuration information of the LTM candidate primary cell, then the configuration information of the LTM candidate primary cell is retained.

[0275] In case 3 or case 6, the strategy of "retaining the LTM candidate primary cell configuration information when the first condition is met" is: if the first indication information corresponding to the CHO target primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information, and the first indication information that has a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is public indication information for retaining the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is retained.

[0276] It should be noted that for the retention operation, the LTM candidate primary cell configuration information can be retained and stored on the terminal device. The specific storage location or path is not limited in this application, and this retention method is only an example and should not constitute any limitation to this application.

[0277] As a result, the terminal device can retain the LTM candidate primary cell configuration information based on the processing strategy, avoiding the terminal device's repeated acquisition of the LTM candidate primary cell configuration information when performing an LTM handover, thereby reducing signaling overhead. Furthermore, if the "processing strategy for LTM candidate primary cell configuration information" can be related to the CHO target primary cell, the first indication information, when including different content, corresponds to different retention strategies, thereby increasing the flexibility of retaining the LTM candidate primary cell configuration information.

[0278] The above is a description of a solution for retaining the configuration information of a candidate LTM primary cell. The following is a description of a solution for releasing the configuration information of a candidate LTM primary cell.

[0279] It should be understood that whether the first indication information includes release timing indication information can affect the order in which the CHO primary cell change is executed and the LTM candidate primary cell configuration information is released. Therefore, the following details the situation in which the first indication information includes release timing indication information, as well as the specific method for releasing the LTM candidate primary cell configuration information.

[0280] Case 1: the first indication information does not include release timing indication information.

[0281] Accordingly, when the second condition is met, the LTM candidate primary cell configuration information is released, and the second condition includes at least one of the following conditions:

[0282] (1) The CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information.

[0283] (2) The first indication information that has triggered the CHO primary cell change and has a mapping relationship with the configuration information in the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information.

[0284] It should be understood that the above-mentioned situation 1 may include any one or more of the above-mentioned situations 1, 2, or 3. In situation 1, the second condition is: the CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information. In situation 2, the second condition is: the CHO primary cell change has been triggered, and the first indication information having a mapping relationship with the configuration information of the set including the configuration information of the CHO target primary cell is public indication information for releasing the LTM candidate primary cell configuration information. In situation 3, the second condition is: the CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been triggered, and the first indication information having a mapping relationship with the configuration information of the set including the configuration information of the CHO target primary cell is public indication information for releasing the LTM candidate primary cell configuration information.

[0285] Accordingly, in case 1, the strategy of "releasing the LTM candidate primary cell configuration information when the second condition is met" is: if the CHO primary cell change has been triggered and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, the LTM candidate primary cell configuration information is released.

[0286] In case 2, the strategy of "releasing the configuration information of the LTM candidate primary cell when the second condition is met" is: if the CHO primary cell change has been triggered, and the first indication information that has a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the configuration information of the LTM candidate primary cell, then the LTM candidate primary cell configuration information is released.

[0287] In case 3, the strategy of "releasing the LTM candidate primary cell configuration information when the second condition is met" is: if the CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is the private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been triggered, and the first indication information having a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0288] It should be noted that, for the above-mentioned release operation, the LTM candidate primary cell configuration information can be deleted when the CHO primary cell change is triggered, or the LTM candidate primary cell configuration information can be released by other methods when the CHO primary cell change is triggered. This application does not limit this. It should also be understood that "the CHO primary cell change has been triggered" can be an operation when the terminal device makes a change after evaluation, that is, it can be an operation when it is evaluated that there is a CHO target primary cell that meets the corresponding execution conditions, or an operation when the connection with the original primary cell network device is disconnected, or an operation when the terminal device connects to the target primary cell network device. Therefore, the embodiment of this application does not specifically limit the specific operation of "the CHO primary cell change has been triggered".

[0289] Optionally, after the terminal device triggers the execution of the CHO primary cell change, the execution of the CHO primary cell change may fail. If the LTM candidate primary cell configuration information has been released when the CHO primary cell change fails, and the first indication information corresponding to the CHO candidate primary cell when performing cell reselection is to retain the LTM candidate primary cell configuration information, then the method can send second indication information to the target primary cell network device when the LTM candidate primary cell configuration information has been released and cell reselection is performed, or after the LTM candidate primary cell configuration information has been released and cell reselection is performed, the second indication information is used to indicate that the LTM candidate primary cell configuration information has been released.

[0290] It should be understood that the specific form of the above-mentioned "second indication information" can be a field representing that "the terminal device has released the LTM candidate primary cell configuration information", for example, the field "released" is a field used to represent that "the terminal device has released the LTM candidate primary cell configuration information", etc., or it can be an identification, index, number and other indication information representing "released", for example, the digital number 32 is used to represent that the LTM candidate primary cell configuration information has been released, and 32A is used to represent that the LTM candidate primary cell configuration information has been released under Scheme 1. This application is not limited to this.

[0291] In other words, after a terminal device triggers a CHO primary cell change, the result of the CHO primary cell change is either success or failure. In the first scenario, however, the condition for releasing the LTM candidate primary cell configuration information is that the CHO primary cell change has been triggered, regardless of the result of the CHO primary cell change. Since cell reselection can be performed and access can be made to the reselected CHO target primary cell when a CHO primary cell change is determined to have failed, the first indication information corresponding to the two CHO primary cell changes may be inconsistent. For example, if the first indication information before reselection is to release the LTM candidate primary cell configuration information, and the first indication information corresponding to the CHO candidate primary cell after reselection is to retain the LTM candidate primary cell configuration information, then the embodiment of the present application can send the second indication information used to indicate that the LTM candidate primary cell configuration information has been released to the target primary cell network device, so that it can determine whether to reconfigure the LTM candidate primary cell for the terminal device. If the LTM candidate primary cell is to be reconfigured for the terminal device, the timeliness of the terminal device's subsequent receipt of the LTM candidate primary cell configuration information can be improved; if it is determined that the terminal device does not need to reconfigure the LTM candidate primary cell, waste of communication resources can be avoided.

[0292] It should be understood that, in the following situation, different specific content situations of the first indication information correspond to different release strategies. The above first indication information with different specific content situations, "Processing strategy for LTM candidate primary cell configuration information" is related to the CHO target primary cell, making the release strategy of the LTM candidate primary cell configuration information optional.

[0293] Case 2: The first indication information includes release timing indication information. In case 2, unconditional release timing indication information is used as an example for explanation:

[0294] Accordingly, when the third condition is met, the LTM candidate primary cell configuration information is released, and the third condition includes at least one of the following conditions:

[0295] (1) The CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information.

[0296] (2) The first indication information that the CHO primary cell change has been successfully executed and has a mapping relationship with the configuration information in the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information.

[0297] It should be understood that the above-mentioned situation 2 may include any one or more of the above-mentioned situations 4, 5, or 6. In situation 4, the third condition is: the CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information. In situation 5, the third condition is: the CHO primary cell change has been successfully executed, and the first indication information having a mapping relationship with the configuration information of the set including the configuration information of the CHO target primary cell is public indication information for releasing the LTM candidate primary cell configuration information. In situation 6, the third condition is: the CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been successfully executed, and the first indication information having a mapping relationship with the configuration information of the set including the configuration information of the CHO target primary cell is public indication information for releasing the LTM candidate primary cell configuration information.

[0298] Accordingly, in case 4, the strategy of "releasing the LTM candidate primary cell configuration information when the third condition is met" is: if the CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0299] In case 5, the strategy of "releasing the LTM candidate primary cell configuration information when the third condition is met" is: if the CHO primary cell change has been successfully executed, and the first indication information that has a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0300] In case 6, the strategy of "releasing the LTM candidate primary cell configuration information when the third condition is met" is: if the CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been successfully executed, and the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0301] It should be noted that, for the above-mentioned release operation, the LTM candidate primary cell configuration information can be deleted when the CHO primary cell change has been successfully executed, or other methods can be used to release the LTM candidate primary cell configuration information when the CHO primary cell change has been successfully executed. This application does not limit this.

[0302] It should be understood that when the first indication information under the same content includes release timing indication information, the release strategy is made optional, so as to make the processing of the LTM candidate primary cell configuration information more flexible.

[0303] Therefore, when the "processing strategy for LTM candidate primary cell configuration information" can be associated with the CHO target primary cell, different processing strategies may be associated with different specific contents of the first indication information. The above first indication information with different specific contents, when the "processing strategy for LTM candidate primary cell configuration information" is associated with the CHO target primary cell, makes the processing strategy for LTM candidate primary cell configuration information selectable.

[0304] The above describes the three processing strategies for "preserving the LTM candidate primary cell configuration information when the first condition is met," "releasing the LTM candidate primary cell configuration information when the second condition is met," and "releasing the LTM candidate primary cell configuration information when the third condition is met" when the "processing strategy for LTM candidate primary cell configuration information" is related to the CHO target primary cell, taking into account the different situations of the first indication information content. All three processing strategies are related to the CHO target primary cell. It should be understood that the processing strategies may also be unrelated to the CHO target primary cell.

[0305] Therefore, in the following, when the "processing strategy for the LTM candidate primary cell configuration information" is unrelated to the CHO target primary cell, combined with the different situations of the first indication information content, the three processing strategies of "retaining the LTM candidate primary cell configuration information when the fourth condition is met", "releasing the LTM candidate primary cell configuration information when the fifth condition is met", and "releasing the LTM candidate primary cell configuration information when the sixth condition is met" are introduced respectively.

[0306] When the fourth condition is met, the LTM candidate primary cell configuration information is retained, where the fourth condition includes at least one of the following conditions:

[0307] (1) All first indication information corresponding to the CHO candidate primary cell configuration information is private indication information for reserving the LTM candidate primary cell configuration information.

[0308] (2) All first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is public indication information for reserving the LTM candidate primary cell configuration information.

[0309] It should be noted that, in case 1 or 4, the fourth condition is: all first indication information corresponding to the CHO candidate primary cell configuration information is private indication information that retains the LTM candidate primary cell configuration information. In case 2 or 5, the fourth condition is: all first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is public indication information that retains the LTM candidate primary cell configuration information. In case 3 or 6, the fourth condition is: all first indication information corresponding to the CHO candidate primary cell configuration information is private indication information that retains the LTM candidate primary cell configuration information, and all first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is public indication information that retains the LTM candidate primary cell configuration information.

[0310] Correspondingly, in case 1 or case 4, the strategy of "retaining the LTM candidate primary cell configuration information when the fourth condition is met" is: if the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is retained.

[0311] In case 2 or case 5, the strategy of "retaining the LTM candidate primary cell configuration information when the fourth condition is met" is: if all first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is public indication information for retaining the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is retained.

[0312] In case 3 or case 6, the strategy of "retaining the LTM candidate primary cell configuration information when the fourth condition is met" is: if all the first indication information corresponding to the CHO candidate primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information, and all the first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is public indication information for retaining the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is retained.

[0313] It should be noted that for the retention operation, the LTM candidate primary cell configuration information can be retained and stored on the terminal device. The specific storage location or path is not limited in this application, and this retention method is only an example and should not constitute any limitation to this application.

[0314] It should be understood that when the "processing strategy for LTM candidate primary cell configuration information" may be unrelated to the CHO target primary cell, the first indication information corresponds to different retention strategies when including different contents, so as to improve the flexibility of retaining the LTM candidate primary cell configuration information.

[0315] The above is a description of another solution for retaining the configuration information of the LTM candidate primary cell. The following is a description of another solution for releasing the configuration information of the LTM candidate primary cell.

[0316] It should be understood that whether the first indication information includes release timing indication information can affect the order in which the CHO primary cell change is executed and the LTM candidate primary cell configuration information is released. Therefore, the following details the situation in which the first indication information includes release timing indication information, as well as another specific solution for releasing the LTM candidate primary cell configuration information.

[0317] Case 1: the first indication information does not include release timing indication information.

[0318] Accordingly, when the fifth condition is met, the LTM candidate primary cell configuration information is released, and the fifth condition includes at least one of the following conditions:

[0319] (1) The CHO primary cell change has been triggered, and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information.

[0320] (2) The first indication information that the CHO primary cell change has been triggered and the configuration information of all CHO candidate primary cell sets have a mapping relationship is the public indication information for releasing the LTM candidate primary cell configuration information.

[0321] It should be understood that the above-mentioned situation 1 may include any one or more of the above-mentioned situations 1, 2 or 3. In situation 1, the fifth condition is: the CHO primary cell change has been triggered, and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information. In situation 2, the fifth condition is: the CHO primary cell change has been triggered, and the first indication information with a mapping relationship between the configuration information of all CHO candidate primary cell sets is public indication information for releasing the LTM candidate primary cell configuration information. In situation 3, the fifth condition is: the CHO primary cell change has been triggered, and the first indication information with a mapping relationship between the configuration information of all CHO candidate primary cell sets is private indication information for releasing the LTM candidate primary cell configuration information; and the CHO primary cell change has been triggered, and the first indication information with a mapping relationship between the configuration information of all CHO candidate primary cell sets is public indication information for releasing the LTM candidate primary cell configuration information.

[0322] Accordingly, in case 1, the strategy of "releasing the LTM candidate primary cell configuration information when the fifth condition is met" is: if the CHO primary cell change has been triggered and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0323] In case 2, the strategy of "releasing the LTM candidate primary cell configuration information when the fifth condition is met" is: if the CHO primary cell change has been triggered and the configuration information of all CHO candidate primary cell sets has a mapping relationship, the first indication information is the public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0324] In case 3, the strategy of "releasing the LTM candidate primary cell configuration information when the fifth condition is met" is: if the CHO primary cell change has been triggered and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been triggered and the first indication information corresponding to the configuration information of all CHO candidate primary cell sets has a mapping relationship is public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0325] It should be noted that, for the above-mentioned release operation, the LTM candidate primary cell configuration information can be deleted when the CHO primary cell change is triggered, or other methods can be used to release the LTM candidate primary cell configuration information when the CHO primary cell change is triggered. This application does not limit this.

[0326] Optionally, after the terminal device triggers the execution of the CHO primary cell change, the execution of the CHO primary cell change may fail. The failure of the execution of the CHO primary cell change is as described above and will not be repeated here.

[0327] It should be understood that, in the following situation, different specific contents of the first indication information correspond to different release strategies. The above first indication information with different specific contents makes the release strategy of the configuration information of the LTM candidate primary cell optional when the "processing strategy for the configuration information of the LTM candidate primary cell" is irrelevant to the CHO target primary cell.

[0328] Case 2: The first indication information includes release timing indication information. In case 2, unconditional release timing indication information is used as an example for explanation:

[0329] When the sixth condition is met, the LTM candidate primary cell configuration information is released. The sixth condition includes at least one of the following conditions:

[0330] (1) The CHO primary cell change has been successfully executed, and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information.

[0331] (2) The CHO primary cell change has been successfully executed, and the first indication information of the configuration information of the CHO candidate primary cell set having a mapping relationship is the public indication information for releasing the LTM candidate primary cell configuration information.

[0332] It should be understood that the above-mentioned situation 2 may include any one or more of the above-mentioned situations 4, 5 or 6. In situation 4, the sixth condition is: the CHO primary cell change has been successfully executed, and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information. In situation 5, the sixth condition is: the CHO primary cell change has been successfully executed, and the first indication information with which the configuration information of the CHO candidate primary cell set has a mapping relationship is public indication information for releasing the LTM candidate primary cell configuration information. In situation 6, the sixth condition is: the CHO primary cell change has been successfully executed, and the first indication information with which the configuration information of the CHO candidate primary cell set has a mapping relationship is private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been successfully executed, and the first indication information with which the configuration information of the CHO candidate primary cell set has a mapping relationship is public indication information for releasing the LTM candidate primary cell configuration information.

[0333] Accordingly, in case 4, the strategy of "releasing the LTM candidate primary cell configuration information when the sixth condition is met" is: if the CHO primary cell change has been successfully executed, and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0334] In case 5, the strategy of "releasing the LTM candidate primary cell configuration information when the sixth condition is met" is: if the CHO primary cell change has been successfully executed, and the first indication information of the mapping relationship between the configuration information of the CHO candidate primary cell set is the public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0335] In case 6, the strategy of "releasing the LTM candidate primary cell configuration information when the sixth condition is met" is: if the CHO primary cell change has been successfully executed, and the first indication information corresponding to all CHO candidate primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information, and the CHO primary cell change has been successfully executed, and the first indication information corresponding to the configuration information of the CHO candidate primary cell set has a mapping relationship is public indication information for releasing the LTM candidate primary cell configuration information, then the LTM candidate primary cell configuration information is released.

[0336] It should be noted that, for the above-mentioned release operation, the LTM candidate primary cell configuration information can be deleted when the CHO primary cell change has been successfully executed, or other methods can be used to release the LTM candidate primary cell configuration information when the CHO primary cell change has been successfully executed. This application does not limit this.

[0337] Therefore, the "processing strategy for LTM candidate primary cell configuration information" can be independent of the CHO target primary cell, and different processing strategies are corresponding to different specific contents of the first indication information. The above first indication information with different specific contents, "processing strategy for LTM candidate primary cell configuration information," is independent of the CHO target primary cell, making the processing strategy for LTM candidate primary cell configuration information optional.

[0338] Therefore, in various cases where the first indication information includes any one or more of the above items, the embodiment of the present application may combine one or more items when determining the processing strategy for the LTM candidate primary cell configuration information.

[0339] In case 1, the first indication information includes first retention indication information and / or first release indication information. The policy corresponding to case 1 may be any one or more of the following:

[0340] (1) If the first indication information corresponding to the CHO target primary cell configuration information is the first retention indication information, the LTM candidate primary cell configuration information is retained.

[0341] (2) If the CHO primary cell change is triggered, and the first indication information corresponding to the CHO target primary cell configuration information is the first release indication information, the LTM candidate primary cell configuration information is released when the CHO primary cell change is triggered.

[0342] (3) If the first indication information corresponding to all CHO candidate primary cell configuration information is the first retention indication information, the LTM candidate primary cell configuration information is retained.

[0343] (4) If the CHO primary cell change has been triggered and the first indication information corresponding to all CHO candidate primary cell configuration information is the first release indication information, the LTM candidate primary cell configuration information is released.

[0344] In other words, after receiving the first indication information, if the terminal device determines the CHO target primary cell to which it is to change, it determines the first indication information corresponding to the CHO target primary cell configuration information, and after determining that the specific content included in the first indication information is private indication information, the terminal device retains or releases the LTM candidate primary cell configuration information according to the content included in the private indication information. For example, there are two CHO candidate primary cells: CHO candidate primary cell A and CHO candidate primary cell B. The private indication information corresponding to CHO candidate primary cell A is the first retention indication information, and the private indication information corresponding to CHO candidate primary cell B is the first release indication information. Then, when changing to CHO candidate primary cell A, the LTM candidate primary cell configuration information can be retained according to the first retention indication information corresponding to CHO candidate primary cell A; when changing to CHO candidate primary cell B, the LTM candidate primary cell configuration information can be released according to the first release indication information corresponding to CHO candidate primary cell B, and vice versa.

[0345] In case 2, the first indication information includes second retention indication information and / or second release indication information, and the corresponding policies may be any one or more of the following:

[0346] (1) If the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the second retention indication information, the configuration information of the LTM candidate primary cell is retained.

[0347] (2) If the CHO primary cell change has been triggered, and the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the second release indication information, then the LTM candidate primary cell configuration information is released when the CHO primary cell change has been triggered.

[0348] (3) If all first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is the second retention indication information, the LTM candidate primary cell configuration information is retained.

[0349] (4) If the CHO primary cell change is triggered and the first indication information having a mapping relationship between the configuration information of all CHO candidate primary cell sets is the second release indication information, the LTM candidate primary cell configuration information is released.

[0350] In other words, after the terminal device receives the first indication information, if it determines the CHO target main cell to be changed to, it determines the first indication information corresponding to the configuration information of the set where the configuration information of the CHO target main cell is located, and after determining that the specific content included in the first indication information is public indication information, the terminal device retains or releases the LTM candidate main cell configuration information according to the specific content of the public indication information.

[0351] In case 3, the first indication information includes first retention indication information, first release indication information, second retention indication information and / or second release indication information. The policy corresponding to case 3 may be any one or more of the following:

[0352] (1) If the first indication information corresponding to the CHO target primary cell configuration information is the first retention indication information and the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the second retention indication information, the LTM candidate primary cell configuration information is retained.

[0353] (2) If the CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is the first release indication information, and the CHO primary cell change has been triggered, and the first indication information having a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is the second release indication information, then the LTM candidate primary cell configuration information is released when the CHO primary cell change has been triggered.

[0354] (3) If all first indication information corresponding to the CHO candidate primary cell configuration information is first retention indication information, and all first indication information having a mapping relationship with the configuration information of the CHO candidate primary cell set is second retention indication information, the LTM candidate primary cell configuration information is retained.

[0355] (4) If the CHO primary cell change has been triggered and the first indication information corresponding to all CHO candidate primary cell configuration information is the first release indication information, and if the CHO primary cell change has been triggered and the first indication information corresponding to the configuration information of the CHO candidate primary cell set having a mapping relationship is the second release indication information, then the LTM candidate primary cell configuration information is released when the CHO primary cell change has been triggered.

[0356] It should be understood that the above case 1, case 2 or case 3 corresponds to a case that does not include unconditional release timing indication information, and the following case 4, case 5 or case 6 corresponds to a case that includes unconditional release timing indication information.

[0357] In case 4, the specific content of the first indication information includes release timing indication information and first release indication information, and may also include first retention indication information. The strategy corresponding to case 4 may be any one or more of the following:

[0358] (1) If the first indication information corresponding to the CHO target primary cell configuration information is the first retention indication information, the LTM candidate primary cell configuration information is retained.

[0359] (2) If the CHO primary cell change is successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is the first release indication information, the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully executed.

[0360] (3) If the first indication information corresponding to all CHO candidate primary cell configuration information is the first retention indication information, the LTM candidate primary cell configuration information is retained.

[0361] (4) If the CHO primary cell change is successfully executed and the first indication information corresponding to all CHO candidate primary cell configuration information is the first release indication information, the LTM candidate primary cell configuration information is released.

[0362] In case 5, the first indication information includes release timing indication information and second release indication information, and may also include second retention indication information. The policy corresponding to case 5 may be any one or more of the following:

[0363] (1) If the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the second retention indication information, the configuration information of the LTM candidate primary cell is retained.

[0364] (2) If the CHO primary cell change is successfully executed, and the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the second release indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully executed.

[0365] (3) If all first indication information that has a mapping relationship with the configuration information of the CHO candidate primary cell set is the second retention indication information, the LTM candidate primary cell configuration information is retained.

[0366] (4) If the CHO primary cell change is successfully executed and the first indication information having a mapping relationship between the configuration information of the CHO candidate primary cell set is the second release indication information, the LTM candidate primary cell configuration information is released.

[0367] In case 6, the first indication information includes release timing indication information, first release indication information, and second release indication information, and may also include first retention indication information or second retention indication information. The policy corresponding to case 6 may be any one or more of the following:

[0368] (1) If the first indication information corresponding to the CHO target primary cell configuration information is the first retention indication information and the first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is the second retention indication information, the LTM candidate primary cell configuration information is retained.

[0369] (2) If the CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is the first release indication information, and the CHO primary cell change has been successfully executed, and the first indication information having a mapping relationship with the configuration information of the set where the configuration information of the CHO target primary cell is located is the second release indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change has been successfully executed.

[0370] (3) If all first indication information corresponding to the CHO candidate primary cell configuration information is first retention indication information, and all first indication information having a mapping relationship with the configuration information of the CHO candidate primary cell set is second retention indication information, the LTM candidate primary cell configuration information is retained.

[0371] (4) If the CHO primary cell change has been successfully executed, and the first indication information corresponding to all CHO candidate primary cell configuration information is the first release indication information, and the CHO primary cell change has been successfully executed, and the first indication information corresponding to the configuration information of the CHO candidate primary cell set having a mapping relationship is the second release indication information, then the LTM candidate primary cell configuration information is released.

[0372] Therefore, different specific content of the first indication information corresponds to different processing strategies. The above first indication information with different specific content provides selectable processing strategies for the configuration information of the LTM candidate primary cell. Furthermore, first indication information with the same content can correspond to one or more retention strategies, or one or more release strategies, making the processing of LTM candidate primary cell configuration information more flexible when the first indication information contains the same content.

[0373] It should also be understood that different types of release timing indication information have an impact on the processing strategy corresponding to the case where the first indication information includes the release timing indication information (for example, case 4, case 5, or case 6). Therefore, the following uses conditional release timing indication information as an example to illustrate the processing strategy corresponding to each case:

[0374] In case 4, the first indication information includes release timing indication information and first release indication information. If part of the first release indication information is associated with the release timing indication information, and part of the first release indication information is not associated with the release timing indication information, the corresponding processing strategy may be: if a CHO primary cell change occurs and the CHO target primary cell is the CHO candidate primary cell corresponding to the first release indication information associated with the release timing indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed; or, if a CHO primary cell change occurs and the CHO target primary cell is the CHO candidate primary cell corresponding to the first release indication information not associated with the release timing indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change is triggered.

[0375] In case 5, if the content of the first indication information includes release timing indication information and second release indication information, and the release timing indication information is associated with the second release indication information, the corresponding processing strategy may be: if a CHO primary cell change occurs, and the configuration information of the set where the configuration information of the CHO target primary cell is located is the configuration information of the CHO candidate primary cell set corresponding to the second release indication information associated with the release timing indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed.

[0376] In case 6, the content of the first indication information includes release timing indication information, first release indication information, and second release indication information. If part of the first release indication information is associated with the release timing indication information, part of the first release indication information is not associated with the release timing indication information, and part of the release timing indication information is associated with the second release indication information, the corresponding processing strategy may be:

[0377] (1) If a CHO primary cell change occurs, and the CHO target primary cell is the CHO candidate primary cell corresponding to the first release indication information associated with the release timing indication information, and the configuration information of the set containing the configuration information of the CHO target primary cell is the configuration information of the CHO candidate primary cell set corresponding to the second release indication information associated with the release timing indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed.

[0378] (2) On the contrary, if a CHO primary cell change occurs and the CHO target primary cell is not the CHO candidate primary cell corresponding to the first release indication information associated with the release timing indication information, or the configuration information of the set to which the configuration information of the CHO target primary cell belongs is not the configuration information of the CHO candidate primary cell set corresponding to the second release indication information associated with the release timing indication information, then the LTM candidate primary cell configuration information is released after the CHO primary cell change is triggered.

[0379] Therefore, on the basis that different processing strategies correspond to different specific contents of different first indication information, different release timing indication information also corresponds to different processing strategies, making the processing of LTM candidate primary cell configuration information more flexible when the first indication information includes release timing indication information.

[0380] It should be noted that, in addition to the above six situations, this embodiment can also provide the following other situations and corresponding processing strategies:

[0381] Case 7: the first indication information includes release timing indication information.

[0382] It should be understood that in case 7, the specific content of the first indication information is release timing indication information, and the corresponding processing strategy is: releasing the LTM candidate primary cell configuration information after the CHO primary cell replacement is successfully completed.

[0383] In situation 7, when the terminal device determines to change the CHO main cell, it can automatically release the LTM candidate main cell configuration information after the CHO main cell replacement is successfully completed according to the corresponding processing strategy, and will not release the LTM candidate main cell configuration information before the CHO main cell replacement is successfully completed, so as to avoid the phenomenon that the switching mode cannot be changed normally after the CHO main cell replacement fails, and improve the comprehensiveness and selectivity of the content of the first indication information, thereby improving the comprehensiveness and selectivity of the processing strategy.

[0384] In the first solution of the embodiment of the present application, in addition to introducing different processing strategies corresponding to the above different situations, the sustainability of the processing strategy can also be explained as follows:

[0385] The first indication information further includes: fourth indication information, where the fourth indication information is used to instruct to retain or release the first indication information.

[0386] It should be understood that the specific form of the above-mentioned "fourth indication information" can be a field representing "retaining or releasing the first indication information", or it can be an identifier, index, number or other indication information representing "retaining or releasing the first indication information", and this application does not limit this.

[0387] Optionally, after retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the method further includes any one of the following:

[0388] If the fourth indication information is used to instruct to retain the first indication information, the first indication information is retained, so as to retain or release the LTM candidate primary cell configuration information reconfigured by the original primary cell network device according to the first indication information.

[0389] If the fourth indication information is used to indicate the release of the first indication information, the first indication information is released, and the first indication information sent by the original main cell network device is received again to retain or release the LTM candidate main cell configuration information reconfigured by the original main cell network device according to the re-received first indication information.

[0390] It should be understood that in the first embodiment, the first indication information includes at least one of the following information: private indication information, public indication information or release timing indication information, so the fourth indication information can be further refined, that is, the fourth indication information includes at least one of the following: indication information for releasing or retaining private indication information, indication information for releasing or retaining public indication information, or indication information for releasing or retaining release timing indication information.

[0391] Specifically, in case 1, the fourth indication information may include indication information for releasing or retaining private indication information. In case 2, the fourth indication information may include indication information for releasing or retaining public indication information. In case 3, the fourth indication information may include indication information for releasing or retaining private indication information and indication information for releasing or retaining public indication information. In case 4, the fourth indication information may include indication information for releasing or retaining private indication information and indication information for releasing or retaining release timing indication information. In case 5, the fourth indication information may include indication information for releasing or retaining public indication information and indication information for releasing or retaining release timing indication information. In case 6, the fourth indication information may include indication information for releasing or retaining private indication information, indication information for releasing or retaining public indication information, and indication information for releasing or retaining release timing indication information. In case 7, the fourth indication information may include indication information for releasing or retaining release timing indication information.

[0392] Therefore, the content of the fourth indication information is different in different situations. It should be understood that the embodiment of the present application does not specifically limit the content of the fourth indication information. The embodiment of the present application provides a method for indicating whether to retain or release each item in the first indication information. After the LTM candidate primary cell configuration information is retained or released according to the first indication information, the processing strategy can be adjusted. Then, when the LTM candidate primary cell configuration information is subsequently processed, the adjusted processing strategy can be used to process it, making the processing method selective.

[0393] It should be understood that after this processing, the original primary cell network device may send the reconfigured LTM candidate primary cell configuration information, and the reconfigured LTM candidate primary cell configuration information refers to the LTM candidate primary cell configuration information sent by the original primary cell network device after sending the first indication information. For the sake of simplicity, the embodiment of the present application describes the subsequent processing scheme for retaining or releasing the reconfigured LTM candidate primary cell configuration information according to the fourth indication information for Case 1 and Case 2:

[0394] In case 1, if the fourth indication information indicates to retain the private indication information, the private indication information is retained to retain or release the reconfigured LTM candidate primary cell configuration information according to the private indication information. Alternatively, if the fourth indication information indicates to release the private indication information, the first indication information sent by the original primary cell network device is re-received to retain or release the reconfigured LTM candidate primary cell configuration information according to the re-received first indication information.

[0395] In case 2, if the fourth indication information indicates to retain the public indication information, the public indication information is retained to retain or release the reconfigured LTM candidate primary cell configuration information according to the public indication information. Alternatively, if the fourth indication information indicates to release the public indication information, the first indication information sent by the original primary cell network device is re-received to retain or release the reconfigured LTM candidate primary cell configuration information according to the re-received first indication information.

[0396] In other cases, the subsequent processing scheme for retaining or releasing the reconfigured LTM candidate primary cell configuration information according to the fourth indication information is described in a similar manner to the above case and will not be repeated in the embodiments of the present application.

[0397] That is to say, the first indication information can not only indicate the processing strategy for the LTM candidate primary cell configuration information, but also indicate whether the LTM candidate primary cell configuration information subsequently reconfigured by the original primary cell network device can be processed according to the processing strategy. When the fourth indication information indicates that the first indication information is to be retained, it can avoid the waste of communication resources caused by the original primary cell network device continuously sending the first indication information. When the fourth indication information indicates that the first indication information is to be released, it can adjust the processing strategy by the original primary cell network device resending the first indication information in the subsequent process, thereby realizing reasonable processing of the LTM candidate primary cell configuration information. The above is an introduction to the first indication information when the device controlling the processing method is the original primary cell network device, and the specific scheme for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information.

[0398] As previously mentioned, the information included in the first indication information varies depending on the device controlling the processing mode, and the specific scheme for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information also varies. Therefore, the following describes the first indication information when the device controlling the processing mode is a terminal device, and the specific scheme for retaining or releasing the LTM candidate primary cell configuration information based on the first indication information.

[0399] Option 2:

[0400] When the device controlling the processing mode is a terminal device, the first indication information includes the following information: indication information of the terminal device autonomously retaining or releasing the LTM candidate primary cell configuration information.

[0401] It should be understood that the specific form of the "indication information indicating that the terminal device autonomously retains or releases the LTM candidate primary cell configuration information" may be a field indicating "autonomous processing," such as the field "autonomous processing," or may be information indicating "autonomous processing" such as an identifier, index, or number. For example, the number 12 is used to indicate "autonomous processing," and this application is not limited thereto. Furthermore, the "LTM candidate primary cell configuration information" may be expressed in the form of the name, number, or other form of the LTM candidate primary cell.

[0402] In other words, the original primary cell network equipment sends an instruction message for the terminal device to autonomously retain or release the LTM candidate primary cell configuration information. The terminal device can autonomously determine whether to retain or release the LTM candidate primary cell configuration information when a CHO primary cell change occurs. Specifically, if the information autonomously determined by the terminal device indicates that the autonomous processing method is the retain method, the LTM candidate primary cell configuration information is retained when a CHO primary cell change occurs. If the information autonomously determined by the terminal device indicates that the autonomous processing method is the release method, the LTM candidate primary cell configuration information is released when a CHO primary cell change occurs.

[0403] It should be understood that the embodiments of the present application do not specifically limit the specific implementation method of how the terminal device autonomously determines whether to retain or release the LTM candidate primary cell configuration information when a CHO primary cell change occurs.

[0404] In one example, after receiving RRC reconfiguration information sent by the original primary cell network device, the terminal device performs a CHO evaluation based on the CHO candidate primary cell configuration information and execution conditions carried in the RRC reconfiguration information. After receiving the first indication information, the terminal device obtains indication information indicating that the terminal device autonomously retains or releases the LTM candidate primary cell configuration information. When evaluating that there is a CHO candidate primary cell that meets the corresponding execution conditions, the terminal device determines that a CHO primary cell change has occurred and determines a CHO target primary cell. Based on the LTM candidate primary cell configuration information carried in the RRC reconfiguration information, the terminal device determines whether there is a CHO target primary cell among the LTM candidate primary cells. If there is no CHO target primary cell among the LTM candidate primary cells, the LTM candidate primary cell configuration information is released when the CHO primary cell change is triggered. Alternatively, if release timing indication information is predefined on the terminal device, the LTM candidate primary cell configuration information is released when the CHO primary cell change is successfully executed.

[0405] Alternatively, if there is a CHO target primary cell among the LTM candidate primary cells, the LTM candidate primary cell configuration information is retained; or, if there is a CHO target primary cell among the LTM candidate primary cells, the LTM candidate primary cell configuration information corresponding to the LTM candidate primary cell that is the CHO target primary cell is retained, and the LTM candidate primary cell configuration information corresponding to the LTM candidate primary cell that is not the CHO target primary cell is released.

[0406] Therefore, the terminal device can autonomously determine the operation to be performed on the LTM candidate primary cell configuration information when a CHO primary cell change occurs, thereby improving the selectivity of the method for processing the candidate primary cell configuration information.

[0407] Optionally, after retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the target primary cell network device sends third indication information, and the third indication information is used to indicate that the terminal device has retained or released the LTM candidate primary cell configuration information.

[0408] It should be understood that the specific form of the above-mentioned "third indication information" can be a field representing that "the terminal device has reserved or released the LTM candidate primary cell configuration information", for example, the field "reserved" is a field used to represent that "the terminal device has reserved the LTM candidate primary cell configuration information", and the field "released" is a field used to represent that "the terminal device has released the LTM candidate primary cell configuration information", etc., or it can be an identifier, index, number and other indication information representing "reserved or released", for example, the digital number 31 is used to represent that the LTM candidate primary cell configuration information has been retained, and the digital number 32 is used to represent that the LTM candidate primary cell configuration information has been released; or, 31B is used to represent that the LTM candidate primary cell configuration information has been retained under Scheme 2, and the digital number 32B is used to represent that the LTM candidate primary cell configuration information has been released under Scheme 2. This application is not limited to this.

[0409] It should also be understood that the terminal device sends a third indication information to the target primary cell network device in an autonomous processing mode, so that the target primary cell network device determines whether to reconfigure the LTM candidate primary cell for the terminal device. If the LTM candidate primary cell for the terminal device is to be reconfigured, the timeliness of the terminal device's subsequent receipt of the LTM candidate primary cell configuration information can be improved; if it is determined that the LTM candidate primary cell for the terminal device does not need to be reconfigured, waste of communication resources can be avoided.

[0410] In the second embodiment of the present application, in addition to introducing the above autonomous processing strategy, the sustainability of the autonomous processing strategy can be further explained as follows:

[0411] The first indication information further includes: fourth indication information, where the fourth indication information is used to instruct to retain or release the first indication information.

[0412] It should be understood that the specific form of the above-mentioned "fourth indication information" can be a field representing "retaining or releasing the first indication information", or it can be an identifier, index, number or other indication information representing "retaining or releasing the first indication information", and this application does not limit this.

[0413] That is to say, the first indication information can not only indicate the processing strategy for the LTM candidate primary cell configuration information, but also indicate whether the LTM candidate primary cell configuration information subsequently reconfigured by the original primary cell network device can be processed according to the processing strategy. Therefore, whether the processing strategy can continue to serve as the basis for subsequent processing is optional.

[0414] Optionally, after retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the method further includes any one of the following:

[0415] If the fourth indication information is used to indicate that the first indication information is to be retained, the first indication information used to indicate the strategy for autonomously processing the LTM candidate primary cell configuration information is retained, so as to retain or release the LTM candidate primary cell configuration information reconfigured by the original primary cell network device according to the strategy for autonomously processing the LTM candidate primary cell configuration information.

[0416] If the fourth indication information is used to instruct the release of the first indication information, the first indication information indicating the strategy for autonomously processing the LTM candidate primary cell configuration information is released, and the first indication information sent by the original primary cell network device is re-received to retain or release the LTM candidate primary cell configuration information reconfigured by the original primary cell network device based on the re-received first indication information. It should be understood that the re-received first indication information may indicate the strategy included in Solution 1, thereby enabling adjustment of the processing strategy.

[0417] Therefore, retaining the first indication information can avoid wasting communication resources caused by the original primary cell network device continuously sending the first indication information. Releasing the first indication information can facilitate adjusting the processing strategy. When processing the LTM candidate primary cell configuration information subsequently, the adjusted processing strategy can be used, making the processing method optional.

[0418] 5 and 6 , the processing schemes for the candidate primary cell configuration information when the device controlling the processing mode is the original primary cell network device and the terminal device are respectively described in detail in the form of signaling interaction between devices.

[0419] FIG5 illustrates, from the perspective of device interaction, the signaling interaction between a terminal device and various network devices when a CHO primary cell change occurs and the original primary cell network device makes a decision in a method 500 for processing candidate primary cell configuration information provided by an embodiment of the present application. With reference to FIG5 , the present embodiment of the present application is described below.

[0420] S501. The terminal device sends measurement results to the original primary cell network device.

[0421] It should be understood that the embodiments of the present application do not specifically limit whether the terminal device is in a single connection state or a dual connection state.

[0422] S502: The original primary cell network device determines to execute CHO and LTM.

[0423] It should be understood that after receiving the measurement results, the original primary cell network device determines whether to execute CHO and LTM based on the measurement results, and determines to execute CHO and LTM when corresponding decision conditions are met.

[0424] It should also be understood that in one example, the candidate primary cell may be only a CHO candidate primary cell, in another example, the candidate primary cell may be only an LTM candidate primary cell, and in yet another example, the candidate primary cell may be both an LTM candidate primary cell and a CHO candidate primary cell. This embodiment does not make any specific limitations on this.

[0425] This embodiment is described as follows using an example where the target primary cell is only a CHO candidate primary cell and the potential target primary cell is both an LTM candidate primary cell and a CHO candidate primary cell:

[0426] For the target primary cell network device, the embodiment of the present application executes S5031 and S5041, and for the potential target primary cell network device, executes S5031 and S5041, as well as S5032 and S5042.

[0427] S5031. The original primary cell network device sends a CHO handover request to the candidate primary cell network device.

[0428] The candidate primary cells include the target primary cell and the potential target primary cell.

[0429] S5041. The candidate primary cell network device sends a CHO handover request response to the original primary cell network device.

[0430] Among them, S5041 enables the original primary cell network device to obtain the CHO candidate primary cell configuration information and execution conditions.

[0431] It should be understood that this execution condition is a CHO execution condition, which can be any one of Event A3, Event A4, and Event A5, or any two of Event A3, Event A4, and Event A5, or Event A3, Event A4, and Event A5. Event A3 is when the quality of the neighboring cell is better than that of the original cell; this event triggers a handover. Event A4 is when the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover. Event A5 is when the quality of the original cell is less than an absolute threshold and the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover.

[0432] S5032: The original primary cell network device sends an LTM handover request to the potential target primary cell network device.

[0433] S5042: The potential target primary cell network device sends an LTM handover request response to the original primary cell network device.

[0434] Among them, S5042 enables the original primary cell network device to obtain the LTM candidate primary cell configuration information. The specific description of S5032 and S5042 can refer to the relevant technology and will not be repeated here.

[0435] S505. The original primary cell network device sends RRC reconfiguration information to the terminal device.

[0436] It should be understood that the RRC reconfiguration information may also be referred to as an RRC reconfiguration message. The RRC reconfiguration information may include: LTM candidate primary cell configuration information, CHO candidate primary cell configuration information, and execution conditions.

[0437] It should also be understood that the RRC reconfiguration information may further include at least one of private indication information, public indication information, and release timing indication information, and any of the above indication information is used to indicate the terminal device's processing strategy for the LTM candidate primary cell configuration information when a CHO primary cell change occurs. The relevant descriptions of the private indication information, public indication information, and release timing indication information are as described above and are not repeated here.

[0438] Therefore, S505 sends at least one of the private indication information, the public indication information and the release timing indication information, the LTM candidate primary cell configuration information, the CHO candidate primary cell configuration information and the execution condition to the terminal device.

[0439] S506. The terminal device sends an RRC reconfiguration completion message to the original primary cell network device.

[0440] S507: The terminal device performs CHO evaluation.

[0441] It should be understood that the terminal device performs CHO evaluation based on the CHO candidate primary cell configuration information and execution conditions to determine the target primary cell.

[0442] S508. The terminal device disconnects from the original primary cell network device.

[0443] S509: The terminal device initiates a random access process to the target primary cell network device.

[0444] S600: The terminal device retains or releases the LTM candidate primary cell configuration information according to at least one of the private indication information, the public indication information, and the release timing indication information.

[0445] It should be understood that if the first indication information includes release timing indication information and private indication information corresponding to the CHO candidate primary cell, if the CHO primary cell change is triggered, and the private indication information corresponding to the CHO target primary cell to be changed to is the first release indication information, then when the CHO primary cell change fails, the first release indication information is ignored, and after the CHO primary cell change is completed, the release is performed according to the private indication information corresponding to the CHO target primary cell that has been successfully changed.

[0446] It should be noted that the specific implementation scheme for retaining or releasing the LTM candidate primary cell configuration information in this embodiment is similar to the specific implementation scheme when the device for controlling the processing mode in the above-mentioned solution 1 is the original primary cell network device, and will not be repeated here.

[0447] FIG6 illustrates, from the perspective of device interaction, the signaling interaction between the terminal device and each network device when a CHO primary cell change occurs and the terminal device makes the decision in a method 600 for processing candidate primary cell configuration information provided in an embodiment of the present application.

[0448] S601. The terminal device sends measurement results to the original primary cell network device.

[0449] It should be understood that the embodiments of the present application do not specifically limit whether the terminal device is in a single connection state or a dual connection state.

[0450] S602: The original primary cell network device determines to execute CHO and LTM.

[0451] It should be understood that after receiving the measurement results, the original primary cell network device determines whether to execute CHO and LTM based on the measurement results, and determines to execute CHO and LTM when corresponding decision conditions are met.

[0452] It should also be understood that in one example, the candidate primary cell may be only a CHO candidate primary cell, in another example, the candidate primary cell may be only an LTM candidate primary cell, and in yet another example, the candidate primary cell may be both an LTM candidate primary cell and a CHO candidate primary cell. This embodiment does not make any specific limitations on this.

[0453] This embodiment is described as follows using an example where the target primary cell is only a CHO candidate primary cell and the potential target primary cell is both an LTM candidate primary cell and a CHO candidate primary cell:

[0454] For the target primary cell network device, the embodiment of the present application executes S6031 and S6041, and for the potential target primary cell network device, executes S6031 and S6041, as well as S6032 and S6042.

[0455] S6031. The original primary cell network device sends a CHO handover request to the candidate primary cell network device.

[0456] The candidate primary cells include the target primary cell and the potential target primary cell.

[0457] S6041. The candidate primary cell network device sends a CHO handover request response to the original primary cell network device.

[0458] Among them, S6041 enables the original primary cell network device to obtain the CHO candidate primary cell configuration information and execution conditions.

[0459] It should be understood that this execution condition is a CHO execution condition, which can be any one of Event A3, Event A4, and Event A5, or any two of Event A3, Event A4, and Event A5, or Event A3, Event A4, and Event A5. Event A3 is when the quality of the neighboring cell is better than that of the original cell; this event triggers a handover. Event A4 is when the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover. Event A5 is when the quality of the original cell is less than an absolute threshold and the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover.

[0460] S6032: The original primary cell network device sends an LTM handover request to the potential target primary cell network device.

[0461] S6042: The potential target primary cell network device sends an LTM handover request response to the original primary cell network device.

[0462] S6042 enables the original primary cell network device to obtain the LTM candidate primary cell configuration information. The specific description of S6032 and S6042 can refer to the relevant technology and will not be repeated here.

[0463] S605. The original primary cell network device sends RRC reconfiguration information to the terminal device.

[0464] It should be understood that the RRC reconfiguration information may also be referred to as an RRC reconfiguration message. The RRC reconfiguration information may include: LTM candidate primary cell configuration information, CHO candidate primary cell configuration information, and execution conditions.

[0465] It should also be understood that the RRC reconfiguration information may also include autonomously determined indication information, which is short for indication information indicating that the terminal device autonomously retains or releases the LTM candidate primary cell configuration information. The description of the indication information indicating that the terminal device autonomously retains or releases the LTM candidate primary cell configuration information is provided above and will not be repeated here.

[0466] Therefore, S605 sends the autonomous determination indication information, LTM candidate primary cell configuration information, CHO candidate primary cell configuration information and execution conditions to the terminal device.

[0467] S606. The terminal device sends an RRC reconfiguration completion message to the original primary cell network device.

[0468] S607: The terminal device performs CHO evaluation.

[0469] It should be understood that the terminal device performs CHO evaluation based on the CHO candidate primary cell configuration information and execution conditions to determine the target primary cell.

[0470] S608. The terminal device disconnects from the original primary cell network device.

[0471] S609: The terminal device initiates a random access process to the target primary cell network device.

[0472] S700: The terminal device retains or releases the configuration information of the LTM candidate primary cell according to the autonomously determined indication information.

[0473] It should be noted that the specific implementation scheme for retaining or releasing the LTM candidate primary cell configuration information in this embodiment is similar to the specific implementation scheme when the device for controlling the processing mode in the above-mentioned solution 2 is a terminal device, and will not be repeated here.

[0474] It should be understood that the above two embodiments realize the effective management of LTM configuration information when the CHO primary cell changes in the terminal device; if the terminal device undergoes LTM switching, then this embodiment can also realize the effective management of CHO configuration information and execution conditions. The scheme description is similar to the embodiment of the present application, and this embodiment will not be repeated.

[0475] The method provided by the embodiment of the present application is described in detail above with reference to Figures 4 to 6. The device provided by the embodiment of the present application is described in detail below with reference to Figure 7.

[0476] FIG7 is a schematic block diagram of a device 7000 for processing candidate primary cell configuration information according to an embodiment of the present application. As shown in FIG7 , the device 7000 for processing candidate primary cell configuration information may include a processing unit 7010 and a transceiver unit 7020 .

[0477] In one possible design, the processing device 7000 for the candidate primary cell configuration information can implement the operations corresponding to the terminal device in the above method embodiment. For example, the processing device for the candidate primary cell configuration information can be a terminal device, or a component configured in the terminal device, such as a chip or circuit.

[0478] The device 7000 for processing candidate primary cell configuration information can implement the corresponding operations of the terminal device in the method embodiments shown in Figures 4 to 6. For example, the transceiver unit 7020 can be used to execute S410 in method 400, and the processing unit 7010 can be used to execute S420 in method 400. Furthermore, the various units in the device 7000 for processing candidate primary cell configuration information and the aforementioned other operations and / or functions are respectively for implementing the corresponding processes in the method embodiment shown in Figure 4.

[0479] Specifically, when the device 7000 for processing the candidate primary cell configuration information is used to execute method 400 in FIG. 4 , the transceiver unit 7020 may be configured to receive first indication information sent by the original primary cell network device, the first indication information being used to indicate a processing strategy for Layer 1 / 2-triggered mobility LTM candidate primary cell configuration information when a CHO primary cell change occurs in the terminal device; the processing unit 7010 may be configured to retain or release the LTM candidate primary cell configuration information based on the first indication information when a CHO primary cell change occurs. The transceiver unit 7020 may also be configured to communicate with the original primary cell network device. The original primary cell network device is the network device to which the original primary cell belongs.

[0480] In another possible design, the processing device 7000 for the candidate primary cell configuration information can implement the operations corresponding to the original primary cell network device in the above method embodiment. For example, the processing device for the candidate primary cell configuration information can be the original primary cell network device, or a component configured in the original primary cell network device, such as a chip or circuit.

[0481] The device 7000 for processing candidate primary cell configuration information can implement the corresponding operations of the original primary cell network device in the method embodiment shown in Figure 4. For example, the transceiver unit 7020 can be used to execute S410 in method 400. Furthermore, the various units in the device 7000 for processing candidate primary cell configuration information and the other operations and / or functions described above are respectively for implementing the corresponding processes in the method embodiment shown in Figure 4.

[0482] Specifically, when the processing device 7000 for the candidate primary cell configuration information is used to execute method 400 in Figure 4, the transceiver unit 7020 can be used to send a first indication information to the terminal device, and the first indication information is used to indicate the processing strategy for the mobility LTM candidate primary cell configuration information triggered by the 1 / 2 layer when the CHO primary cell changes in the terminal device.

[0483] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0484] It should also be understood that the division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0485] It should be understood that the device 7000 for processing candidate primary cell configuration information may correspond to the terminal device 110 or the original primary cell network device 120 in the communication system 100 shown in FIG1 . The terminal device 110 may be an example of a terminal device, and the original primary cell network device 120 may be an example of a primary cell network device. The processing unit 7010 in the device 7000 for processing candidate primary cell configuration information may correspond to a processor in the terminal device 110 or the original primary cell network device 120, and the instructions stored in the memory may be called by the processor in the terminal device 110 or the original primary cell network device 120 to implement the above functions, such as network coding and obtaining original packets; the transceiver unit 7020 may correspond to an interface in the terminal device 110 or the original primary cell network device 120, and may respond to the instructions of the processor to implement the above functions of receiving and / or sending data.

[0486] Specifically, the transceiver unit 7020 in the device 7000 for processing the candidate primary cell configuration information may be implemented by a transceiver or a communication interface, for example, corresponding to the transceiver 8020 in the terminal device 8000 shown in FIG8 and the remote radio unit (RRU) 9020 in the original primary cell network device shown in FIG9 . The processing unit 7010 in the device 7000 for processing the candidate primary cell configuration information may be implemented by at least one processor, for example, corresponding to the processor 8010 in the terminal device 8000 shown in FIG8 and the processor 9060 in the original primary cell network device shown in FIG9 .

[0487] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0488] Figure 8 is a schematic diagram of a possible structure of a terminal device 8000 provided in an embodiment of the present application. The terminal device 8000 can be applied to the system shown in Figure 1 to perform the functions of the terminal device in the above method embodiment. As shown in Figure 8, the terminal device 8000 includes a processor 8010 and a transceiver 8020. Optionally, the terminal device 8000 also includes a memory 8030. The processor 8010, the transceiver 8020, and the memory 8030 can communicate with each other through an internal connection path to transmit control and / or data signals. The memory 8030 is used to store computer programs, and the processor 8010 is used to call and run the computer program from the memory 8030 to control the transceiver 8020 to send and receive signals. Optionally, the terminal device 8000 may also include an antenna 8040 for transmitting the uplink data or uplink control signaling output by the transceiver 8020 via wireless signals.

[0489] The processor 8010 and the memory 8030 may be combined into a device for processing candidate primary cell configuration information. The processor 8010 is configured to execute the program code stored in the memory 8030 to implement the above functions. In a specific implementation, the memory 8030 may also be integrated into the processor 8010 or independent of the processor 8010. The processor 8010 may correspond to the processing unit 7010 in FIG. 7 .

[0490] The transceiver 8020 may correspond to the transceiver unit 7020 in FIG7 . The transceiver 8020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0491] It should be understood that the terminal device 8000 shown in FIG8 is capable of implementing the various processes involved in the terminal device in the method embodiments shown in FIG4 through FIG6 . The operations and / or functions of the various modules in the terminal device 8000 are respectively for implementing the corresponding processes in the aforementioned method embodiments. For details, please refer to the description of the aforementioned method embodiments; to avoid repetition, detailed descriptions are omitted here.

[0492] The processor 8010 can be used to execute the actions implemented within the terminal device described in the previous method embodiments, and the transceiver 8020 can be used to execute the actions described in the previous method embodiments where the terminal device sends or receives information to or from the original primary cell network device. For details, please refer to the description in the previous method embodiments and will not be repeated here.

[0493] Optionally, the terminal device 8000 may further include a power supply 8050 for providing power to various devices or circuits in the terminal device.

[0494] In addition, in order to make the functions of the terminal device more complete, the terminal device 8000 may also include one or more of an input unit 8060, a display unit 8070, an audio circuit 8080, a camera 8090 and a sensor 8100, and the audio circuit 8080 may also include a speaker 8110, a microphone 8120, etc.

[0495] Figure 9 is a schematic diagram of a possible structure of a former primary cell network device provided in an embodiment of the present application, for example, a schematic diagram of the structure of a base station 9000. The base station 9000 can be used in the system shown in Figure 1 to perform the functions of the former primary cell network device in the above-mentioned method embodiment. As shown in Figure 9, the base station 9000 may include one or more radio frequency units (such as RRUs) 9020 and one or more baseband units (BBUs) (also referred to as distributed units (DUs)) 9010. The RRU 9020 may be referred to as a transceiver unit, corresponding to the transceiver unit 7020 in Figure 7. Optionally, the transceiver unit may also be referred to as a transceiver, a transceiver circuit, or a transceiver, and may include at least one antenna 9030 and a radio frequency unit 9040. Optionally, the transceiver unit may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (or a receiver, a receiving circuit), and the transmitting unit may correspond to a transmitter (or a transmitter, a transmitting circuit). The RRU 9020 portion is primarily used for transmitting and receiving radio frequency signals and converting radio frequency signals into baseband signals, for example, for sending first indication information to a terminal device. The BBU 9010 is mainly used for baseband processing and base station control. The RRU 9020 and BBU 9010 can be physically located together or separately, i.e., a distributed base station.

[0496] The BBU 9010 is the control center of the base station, also known as a processing unit, which corresponds to the processing unit 7010 in Figure 7 and is primarily used to perform baseband processing functions such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU (processing unit) can be used to control the base station to execute the operation procedures related to the network device in the above-mentioned method embodiments, such as generating the above-mentioned indication information.

[0497] In one example, the BBU 9010 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network with a single access standard (such as an LTE network), or can separately support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The BBU 9010 also includes a memory 9050 and a processor 9060. The memory 9050 is used to store necessary instructions and data. The processor 9060 is used to control the base station to perform necessary actions, such as controlling the base station to execute the operation process of the network device in the above method embodiment. The memory 9050 and the processor 9060 can serve one or more single boards. That is, a memory and a processor can be set separately on each single board. Alternatively, multiple single boards can share the same memory and processor. In addition, necessary circuits can also be set on each single board.

[0498] It should be understood that the base station 9000 shown in Figure 9 is capable of implementing the various processes involving the original primary cell network device in the method embodiment shown in Figure 4. The operations and / or functions of the various modules in base station 9000 are respectively for implementing the corresponding processes in the above method embodiment. For details, please refer to the description of the above method embodiment. To avoid repetition, detailed description is omitted here.

[0499] The BBU 9010 can be used to perform the actions described in the previous method embodiment, which are implemented internally by the original primary cell network device. The RRU 9020 can be used to perform the actions described in the previous method embodiment, in which the original primary cell network device sends to or receives from the terminal device. For details, please refer to the description in the previous method embodiment and will not be repeated here.

[0500] It should be understood that the base station 9000 shown in Figure 9 is only one possible architecture of the original primary cell network device and should not constitute any limitation to this application. The method provided in this application is applicable to network devices of other architectures. For example, network devices including CU, DU and active antenna unit (AAU). This application does not limit the specific architecture of the original primary cell network device.

[0501] An embodiment of the present application further provides a device for processing candidate primary cell configuration information, including a processor and an interface; the processor is configured to execute the method in any of the above method embodiments.

[0502] It should be understood that the device for processing the candidate primary cell configuration information may be one or more chips. For example, the device for processing the candidate primary cell configuration information may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0503] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0504] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0505] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0506] According to the method provided in the embodiments of the present application, the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the computer executes the method of any one of the embodiments shown in Figures 4 to 6.

[0507] According to the method provided in the embodiments of the present application, the present application also provides a chip system, including at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by lines, and the at least one processor is used to run a computer program or instruction so that the computer executes the method of any one of the embodiments shown in Figures 4 to 6.

[0508] According to the method provided in the embodiments of the present application, the present application also provides a computer program product, including a computer program, which, when run, enables the computer to execute the method of any one of the embodiments shown in Figures 4 to 6.

[0509] The network devices in the above-mentioned various apparatus embodiments completely correspond to the network devices or terminal devices in the terminal devices and method embodiments, and the corresponding steps are performed by the corresponding modules or units. For example, the communication unit (transceiver) performs the receiving or sending steps in the method embodiments, and other steps except sending and receiving can be performed by the processing unit (processor). The functions of the specific units can be referred to the corresponding method embodiments. Among them, there can be one or more processors.

[0510] As used in this specification, the terms "component," "module," "system," and the like are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. By way of illustration, both an application running on a computing device and a computing device can be a component. One or more components can reside in a process and / or an execution thread, and a component can be located on a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component on a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0511] Those skilled in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0512] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0513] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0514] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0515] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0516] In the above embodiments, the functions of each functional unit can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, 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 computer-readable storage medium. 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 a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0517] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0518] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for processing candidate primary cell configuration information, characterized in that: include: Receive first indication information sent by the original primary cell network device, where the first indication information is used to indicate a processing strategy for the mobility LTM candidate primary cell configuration information triggered by the 1 / 2 layer when the CHO primary cell changes in the terminal device; The LTM candidate primary cell configuration information is retained or released according to the first indication information.

2. The method according to claim 1, characterized in that The first indication information includes at least one of the following information: Private indication information for releasing or retaining the LTM candidate primary cell configuration information corresponding to each CHO candidate primary cell configuration information; Public indication information for releasing or retaining LTM candidate primary cell configuration information corresponding to configuration information of at least one CHO candidate primary cell set, wherein the configuration information of the CHO candidate primary cell set includes at least one CHO candidate primary cell configuration information; Release timing indication information, where the release timing indication information is used to indicate that the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed.

3. The method according to claim 2, characterized in that Each private indication information is carried in the corresponding CHO candidate primary cell configuration information.

4. The method according to claim 2, characterized in that The configuration information of the first CHO candidate primary cell set and the public indication information for releasing the LTM candidate primary cell configuration information have a first mapping relationship; And / or, the configuration information of the second CHO candidate primary cell set and the common indication information for retaining the LTM candidate primary cell configuration information have a second mapping relationship.

5. The method according to claim 2, characterized in that When the first condition is met, the LTM candidate primary cell configuration information is retained, where the first condition includes at least one of the following conditions: The first indication information corresponding to the CHO target primary cell configuration information is private indication information for retaining the LTM candidate primary cell configuration information; The first indication information having a mapping relationship with the configuration information of the set in which the configuration information of the CHO target primary cell is located is public indication information for reserving the configuration information of the LTM candidate primary cell.

6. The method according to claim 2, characterized in that If the first indication information does not include release timing indication information, the LTM candidate primary cell configuration information is released when a second condition is met, where the second condition includes at least one of the following conditions: The CHO primary cell change has been triggered, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information; The first indication information that has triggered the CHO primary cell change and has a mapping relationship with the configuration information in the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information.

7. The method according to claim 6, characterized in that If the LTM candidate primary cell configuration information has been released when the CHO primary cell change fails and the first indication information corresponding to the CHO candidate primary cell when cell reselection is performed is to retain the LTM candidate primary cell configuration information, the method further includes: Second indication information is sent to the target primary cell network device, where the second indication information is used to indicate that the LTM candidate primary cell configuration information has been released.

8. The method according to claim 2, characterized in that If the first indication information includes release timing indication information, the LTM candidate primary cell configuration information is released when a third condition is met, where the third condition includes at least one of the following conditions: The CHO primary cell change has been successfully executed, and the first indication information corresponding to the CHO target primary cell configuration information is private indication information for releasing the LTM candidate primary cell configuration information; The first indication information that the CHO primary cell change has been successfully executed and has a mapping relationship with the configuration information in the set where the configuration information of the CHO target primary cell is located is the public indication information for releasing the LTM candidate primary cell configuration information.

9. The method according to claim 1, characterized in that The first indication information includes: indication information for autonomously retaining or releasing the LTM candidate primary cell configuration information by the terminal device.

10. The method according to claim 9, characterized in that After retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the method further includes: Send third indication information to the target primary cell network device, where the third indication information is used to indicate that the terminal device has retained or released the LTM candidate primary cell configuration information.

11. The method according to claim 1, wherein The first indication information further includes: fourth indication information, where the fourth indication information is used to instruct to retain or release the first indication information.

12. The method according to claim 11, characterized in that After retaining or releasing the LTM candidate primary cell configuration information according to the first indication information, the method further includes any one of the following: If the fourth indication information is used to instruct to retain the first indication information, retain the first indication information to retain or release the LTM candidate primary cell configuration information reconfigured by the original primary cell network device according to the first indication information; If the fourth indication information is used to indicate the release of the first indication information, the first indication information is released, and the first indication information sent by the original main cell network device is re-received to retain or release the LTM candidate main cell configuration information reconfigured by the original main cell network device according to the re-received first indication information.

13. The method according to any one of claims 1 to 12, characterized in that The first indication information is carried in radio resource control RRC reconfiguration information or in dedicated signaling.

14. A method for processing candidate primary cell configuration information, characterized in that: include: Send first indication information to the terminal device, where the first indication information is used to indicate a processing strategy for LTM candidate primary cell configuration information when a CHO primary cell change occurs in the terminal device.

15. The method according to claim 14, characterized in that The first indication information at least includes: Private indication information for releasing or retaining the LTM candidate primary cell configuration information corresponding to each CHO candidate primary cell configuration information; Public indication information for releasing or retaining LTM candidate primary cell configuration information corresponding to configuration information of at least one CHO candidate primary cell set, wherein the configuration information of the CHO candidate primary cell set includes at least one CHO candidate primary cell configuration information; Release timing indication information, where the release timing indication information is used to indicate that the LTM candidate primary cell configuration information is released after the CHO primary cell change is successfully completed.

16. The method according to claim 15, characterized in that Each private indication information is carried in the corresponding CHO candidate primary cell configuration information.

17. The method according to claim 15, characterized in that The configuration information of the first CHO candidate primary cell set and the public indication information for releasing the LTM candidate primary cell configuration information have a first mapping relationship; And / or, the configuration information of the second CHO candidate primary cell set and the common indication information for retaining the LTM candidate primary cell configuration information have a second mapping relationship.

18. The method according to claim 14, characterized in that The first indication information includes: indication information for autonomously retaining or releasing the LTM candidate primary cell configuration information by the terminal device.

19. The method according to claim 14, wherein The first indication information further includes: fourth indication information, where the fourth indication information is used to instruct to retain or release the first indication information.

20. The method according to any one of claims 14 to 19, characterized in that The first indication information is carried in radio resource control RRC reconfiguration information or in dedicated signaling.

21. A terminal device, characterized in that: include: processors, memory, and transceivers; The memory stores computer-executable instructions; the transceiver is used to transmit and receive data; The processor executes the computer-executable instructions stored in the memory, so that the terminal device performs the method according to any one of claims 1 to 13.

22. A former primary cell network device, characterized in that: include: processors, memory, and transceivers; The memory stores computer-executable instructions; the transceiver is used to transmit and receive data; The processor executes the computer-executable instructions stored in the memory, so that the original primary cell network device executes the method according to any one of claims 14 to 20.

23. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 20 is implemented.

24. A chip system, characterized in that: The system comprises at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a line, and the at least one processor is configured to run a computer program or instruction to execute the method according to any one of claims 1 to 20.

25. A computer program product, characterized in that The method comprises a computer program which, when being executed, causes a computer to execute the method according to any one of claims 1 to 20.

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