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

Abstract

Embodiments of the present application relate to the technical field of communications, and provide a method for processing candidate cell configuration information, a device, a storage medium, and a product. The method comprises: a terminal device receives first indication information sent by a primary cell network device, the first indication information being used for indicating a processing policy for SCG LTM candidate PScell cell configuration information when a CPC occurs in the terminal device; and, when the terminal device determines a CPC target PScell to which the terminal is to be changed, on the basis of the first indication information, the terminal device reserves or releases the SCG LTM candidate PScell configuration information. Therefore, the SCG LTM candidate PScell configuration information can be effectively managed. The SCG LTM candidate PScell configuration information is promptly released when release thereof is needed, so that the load of the terminal device is reduced. The SCG LTM candidate PScell configuration information is promptly reserved when reservation thereof is needed, so that the waste of resources and delay overhead are avoided.

Description

Method, device, storage medium and product for processing candidate 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 202410175843.9 and application name “Method, device, storage medium and product for processing candidate 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 cell configuration information. Background Art

[0003] With the continuous development of communication and dual-connection technologies, it is necessary to adopt primary and secondary cells to provide communication services in order to enhance the stability of the network environment. This involves the change mechanism of the primary and secondary cells. For the change of the primary and secondary cells, it involves the CPC (Conditional PScell ​​Change, conditional primary and secondary cell change) mechanism and the secondary cell group Layer 1 / 2 triggered mobility mechanism (Secondary Cell Group Layer1 / 2 triggered mobility, SCG LTM). Therefore, when the primary and secondary cells of the CPC mechanism are changed, it is necessary to effectively process the SCG LTM candidate primary and secondary cell configuration information of the terminal device.

[0004] Therefore, there is an urgent need for a solution to effectively process the SCG LTM candidate primary and secondary cell configuration information. This solution can release the SCG LTM candidate primary and secondary cell configuration information in a timely manner when it is no longer necessary to retain it, thereby reducing the load on the terminal device. In addition, this solution can retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner when it is necessary to retain it, thereby avoiding the waste of resources and the resulting delay overhead caused by repeatedly sending the SCG LTM candidate 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 cell configuration information, which are applied to the field of communication technology, in order to quickly retain or release SCG LTM candidate primary and secondary cell configuration information when CPC occurs.

[0006] In a first aspect, embodiments of the present application provide a method for processing candidate cell configuration information, which may be executed by a terminal device, or may be executed by a component (eg, a chip or circuit) configured in the terminal device. This application does not limit this.

[0007] For example, the method includes: receiving a first indication message sent by a main cell network device, the first indication message is used to indicate a processing strategy for the mobility SCG LTM candidate main and secondary cell configuration information triggered by the 1 / 2 layer of the secondary cell group when the main and secondary cells of the terminal device change CPC under certain conditions; when determining the CPC target main and secondary cell to be changed, retaining or releasing the SCG LTM candidate main and secondary cell configuration information according to the first indication message.

[0008] Therefore, the method for processing candidate cell configuration information provided in the embodiment of the present application has provided the terminal device with a processing strategy for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information before CPC occurs, namely, the first indication information. When the terminal device determines the CPC target primary and secondary cell to be changed to, it can retain or release the SCG LTM candidate primary and secondary cell configuration information according to the first indication information.

[0009] If the terminal device always retains the SCG LTM candidate primary and secondary cell configuration information when CPC occurs, or first retains the SCG LTM candidate primary and secondary cell configuration information and then the management personnel instructs to retain or release it on schedule, on the one hand, it will bring a large storage load to the terminal device and reduce the service efficiency of the terminal device; on the other hand, it also reduces the timeliness of the terminal device's retention or release. Therefore, the technical solution provided by the present application provides the terminal device with indication information of the processing strategy for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information before CPC occurs. Then, when determining the CPC target primary and secondary cell to be changed, the SCG LTM candidate primary and secondary cell configuration information can be retained or released in a timely manner based on the first indication information, without having to wait until CPC occurs to determine whether to retain or release the SCG LTM candidate primary and secondary cell configuration information, or retain or release it based on human instructions, which effectively improves the timeliness of retaining or releasing the SCG LTM candidate primary and secondary 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) First retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information.

[0012] (2) First release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information.

[0013] (3) First reserved common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0014] (4) First release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0015] Optionally, the method further includes: retaining the SCG LTM candidate primary and secondary cell configuration information when a first condition is met, where the first condition includes at least one of the following conditions:

[0016] 1. The first indication information includes first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0017] 2. The first indication information includes first release indication information and does not include first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0018] 3. The first indication information includes the first reserved common indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0019] 4. The first indication information includes the first release public indication information and does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0020] That is to say, when the first indication information indicates the retention or release of at least one SCG LTM candidate primary and secondary cell configuration information, the terminal device can determine whether at least one of the above-mentioned first conditions is currently met based on the specific content indicated by the first indication information, and retain the SCG LTM candidate primary and secondary cell configuration information when it is determined that it is met. As a result, the terminal device can selectively retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner to meet the subsequent LTM mechanism switching requirements.

[0021] It should be understood that the above-mentioned indication information related to "retention" or "release" has the function of instructing the terminal device to retain or release the SCG LTM candidate primary and secondary cell configuration information. Therefore, after receiving the first indication information, if the terminal device includes the indication information related to "retention" corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the indication information related to "release" but there is no indication information related to "release" corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then the terminal device can perform the retention action on the SCG LTM candidate primary and secondary cell configuration information to be determined accordingly.

[0022] Optionally, the method further includes: releasing the SCG LTM candidate primary and secondary cell configuration information when a second condition is met, where the second condition includes at least one of the following conditions:

[0023] 1. The first indication information includes first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0024] 2. The first indication information includes first retention indication information and does not include first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0025] 3. The first indication information includes first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0026] 4. The first indication information includes the first reserved public indication information and does not include the first reserved public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0027] That is to say, when the first indication information indicates the retention or release of at least one SCG LTM candidate primary and secondary cell configuration information, the terminal device can determine whether at least one of the above-mentioned second conditions is currently met based on the specific content indicated by the first indication information, and release the SCG LTM candidate primary and secondary cell configuration information when it is determined that it is met. As a result, the terminal device can selectively release the SCG LTM candidate primary and secondary cell configuration information in a timely manner to reduce the terminal load in a timely manner.

[0028] As before, after the terminal device receives the first indication information, if the first indication information includes indication information related to "release" corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes indication information related to "retention" but there is no indication information related to "retention" corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then the SCG LTM candidate primary and secondary cell configuration information can be released accordingly.

[0029] In combination with the first aspect, in certain implementations of the first aspect, the first indication information further includes: second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously. Alternatively, second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously occurs.

[0030] Optionally, when determining the CPC target primary and secondary cell to be changed to, the method retains or releases the SCG LTM candidate primary and secondary cell configuration information according to the first indication information, including: when executing the simultaneous change of the primary cell and the CPC primary and secondary cell, retaining or releasing the SCG LTM candidate primary and secondary cell configuration information according to the first indication information.

[0031] That is to say, when CPC occurs, there may also be a situation where the primary cell changes at the same time. Therefore, the terminal device can retain or release the configuration information of the SCG LTM candidate primary and secondary cells based on the retention or release of at least one SCG LTM candidate primary and secondary cell indicated in the first indication information, and further realize the retention or release of the SCG LTM candidate primary and secondary cell configuration information according to another content indicated by the first indication information when the primary cell changes at the same time. When it is determined that the primary cell and the CPC primary and secondary cells need to be changed at the same time, it can be determined to retain or release the SCG LTM candidate primary and secondary cell configuration information, and the SCG LTM candidate primary and secondary cell configuration information can be retained and released in time, which effectively improves the timeliness of retaining or releasing the SCG LTM candidate primary and secondary cell configuration information when the primary cell and the CPC primary and secondary cells are changed at the same time.

[0032] Optionally, the method further includes: retaining the SCG LTM candidate primary and secondary cell configuration information when a third condition is met, where the third condition is at least one of the following conditions:

[0033] 1. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0034] 2. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention common indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0035] 3. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release indication information and does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information in the first release indication information.

[0036] 4. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information and does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

[0037] 5. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0038] 6. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first retained public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

[0039] 7. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release indication information and the first release indication information does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0040] 8. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information and the first release public indication information does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0041] That is to say, the terminal device can determine whether at least one of the above-mentioned third conditions is met based on the retention or release of at least one SCG LTM candidate primary and secondary cell configuration information indicated in the first indication information, and further determine whether the above-mentioned at least one third condition is met according to another content indicated by the first indication information when the primary cell is changed at the same time, and retain the SCG LTM candidate primary and secondary cell configuration information when it is determined to be met. In this way, the terminal device can selectively retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner to meet the subsequent LTM mechanism switching requirements.

[0042] It should be understood that, considering the characteristics of the primary and secondary cells assisting the primary cell in providing network services, it is determined that when the primary cell changes at the same time, the other content indicated by the first indication information is always used as the priority judgment condition, that is, the other content indicated by the first indication information is prioritized to be determined as retention or release. For example, when retention is indicated, that is, the first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the second release indication information, but there is no second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then it is further determined that the indication information related to "retention" or "release" corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined in the first indication information is retention or release. If retention is still indicated, it is determined that the SCG LTM candidate primary and secondary cell configuration information to be determined is retained.

[0043] Optionally, the method further includes: releasing the SCG LTM candidate primary and secondary cell configuration information when a fourth condition is met, the fourth condition including:

[0044] 1. The first indication information includes the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0045] 2. The first indication information includes the second retention indication information, and the second retention indication information does not include the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0046] 3. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0047] 4. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0048] 5. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0049] 6. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

[0050] That is to say, the terminal device can determine whether at least one of the above-mentioned fourth conditions is met based on the retention or release of at least one SCG LTM candidate primary and secondary cell configuration information indicated in the first indication information, and further determine whether the above-mentioned at least one fourth condition is met according to another content indicated by the first indication information when the primary cell is changed at the same time, and release the SCG LTM candidate primary and secondary cell configuration information when it is determined that it is met. In this way, the terminal device can selectively release the SCG LTM candidate primary and secondary cell configuration information in a timely manner to reduce the terminal load.

[0051] As before, further consideration is given to the feature that the primary and secondary cells assist the primary cell in providing network services. That is, in the dual-connection state, when the LTM change occurs in the primary cell, the primary and secondary cells will adaptively change. Therefore, when another content indicated by the first indication information indicates release, that is, the first indication information includes the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the second retention indication information but there is no second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then it is directly determined that the SCG LTM candidate primary and secondary cell configuration information to be determined is released. When retention is indicated, that is, the first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the second release indication information but there is no second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then it is further determined that the indication information related to "retention" or "release" corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined in the first indication information is retention or release. If release is indicated, it is determined that the SCG LTM candidate primary and secondary cell configuration information to be determined is released.

[0052] In combination with the first aspect, in certain implementations of the first aspect, the first indication information includes: indication information for the terminal device to autonomously process the SCG LTM candidate primary and secondary cell configuration information, and the secondary cell group to which each SCG LTM candidate primary and secondary cell belongs.

[0053] Optionally, the method includes: when a fifth condition is met, retaining the SCG LTM candidate primary and secondary cell configuration information, the fifth condition being:

[0054] The secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

[0055] That is to say, the terminal device can also decide on its own whether to retain the configuration information of the SCG LTM candidate primary and secondary cells according to the first indication information, and can determine whether the above-mentioned fifth condition is met according to the secondary cell group in which each SCG LTM candidate primary and secondary cell in the first indication information is located, so as to retain the configuration information of the SCG LTM candidate primary and secondary cells when it is determined that the condition is met. Thus, the terminal device can selectively retain the configuration information of the SCG LTM candidate primary and secondary cells in a timely manner to meet the subsequent LTM mechanism switching requirements.

[0056] It should be understood that, considering the characteristics of subsequent LTM handover, that is, in the dual-connection state, when the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located, the subsequent LTM handover has a high probability of still being in the secondary cell group. Therefore, when the terminal device autonomously processes the SCG LTM candidate primary and secondary cell configuration information and determines that the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located, it can be determined that the SCG LTM candidate primary and secondary cell configuration information is retained.

[0057] It should also be understood that when the first indication information indicates the retention or release of at least one SCG LTM candidate primary and secondary cell configuration information, the first indication information will not indicate that the terminal device independently determines the retention or release of the SCG LTM candidate primary and secondary cell configuration information. That is, the above two indication scenarios are independent of each other.

[0058] Optionally, the method includes: when a sixth condition is met, releasing the configuration information of the candidate primary and secondary cells in the SCG LTM, the sixth condition being:

[0059] The secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located.

[0060] That is to say, the terminal device can also decide on its own whether to release the configuration information of the SCG LTM candidate primary and secondary cells according to the first indication information, and can determine whether the above-mentioned sixth condition is met according to the secondary cell group in which each SCG LTM candidate primary and secondary cell in the first indication information is located, so as to release the configuration information of the SCG LTM candidate primary and secondary cells when it is determined that the condition is met. Thus, the terminal device can selectively release the configuration information of the SCG LTM candidate primary and secondary cells in a timely manner to reduce the terminal load.

[0061] As before, the subsequent LTM switching characteristics are also considered. That is, in the dual-connection state, when the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located, it is impossible to determine whether the subsequent LTM switching has a high probability of still being in the secondary cell group. Therefore, when the terminal device autonomously processes the SCG LTM candidate primary and secondary cell configuration information, and when the terminal device determines that the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located, it can be determined to release the SCG LTM candidate primary and secondary cell configuration information, which can effectively reduce the load on the terminal.

[0062] Optionally, the method further includes: sending second indication information to the primary cell network device, where the second indication information is used to indicate that the primary cell network device terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

[0063] That is to say, based on the connection with the primary cell network device, the terminal device can, on the basis of receiving the first indication information sent by the primary cell network device, send the second indication information to the primary cell network device if it decides to release the candidate primary and secondary cell configuration information in the SCG LTM. Transmitting the release status of the candidate primary and secondary cell configuration information in the SCG LTM to the primary cell network device based on the second indication information is conducive to the primary cell network device to timely configure the SCG LTM candidate primary and secondary cell configuration information when triggering the LTM mechanism for the terminal device in the future.

[0064] In combination with the first aspect, in certain implementations of the first aspect, the first indication information further includes: second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously. Alternatively, second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously occurs.

[0065] Optionally, when determining the CPC target primary and secondary cell to be changed to, the method retains or releases the SCG LTM candidate primary and secondary cell configuration information according to the first indication information, including: when executing the simultaneous change of the primary cell and the CPC primary and secondary cell, retaining or releasing the SCG LTM candidate primary and secondary cell configuration information according to the first indication information.

[0066] That is to say, when CPC occurs, there may also be a situation where the primary cell is changed at the same time. Therefore, the terminal device can independently determine the retention or release of the SCG LTM candidate primary and secondary cell configuration information based on the indication in the first indication information, and further realize the retention or release of the SCG LTM candidate primary and secondary cell configuration information according to another content indicated by the first indication information when the primary cell is changed at the same time. When it is determined that the primary cell and the CPC primary and secondary cell are to be changed at the same time, it can be determined whether the SCG LTM candidate primary and secondary cell configuration information is to be retained or released, thereby timely retaining and releasing the SCG LTM candidate primary and secondary cell configuration information, thereby improving the timeliness of retaining or releasing the SCG LTM candidate primary and secondary cell configuration information when performing the simultaneous change of the primary cell and the CPC primary and secondary cell.

[0067] Optionally, the method further includes: retaining the SCG LTM candidate primary and secondary cell configuration information when a seventh condition is met, where the seventh condition is at least one of the following conditions:

[0068] 1. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

[0069] 2. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information, and the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

[0070] That is to say, the terminal device can determine whether to retain or release the SCG LTM candidate primary and secondary cell configuration information based on the indication in the first indication information that the terminal device independently determines whether to retain or release the SCG LTM candidate primary and secondary cell configuration information, and further determine whether at least one of the above-mentioned seventh conditions is met according to another content indicated by the first indication information when the primary cell is changed at the same time, and retain the SCG LTM candidate primary and secondary cell configuration information when it is determined that it is met. In this way, the terminal device can selectively retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner to meet the subsequent LTM mechanism switching requirements.

[0071] It should be understood that, considering the characteristics of the primary and secondary cells assisting the primary cell in providing network services, it is determined that when the primary cell changes at the same time, the other content indicated by the first indication information is always used as the priority judgment condition, that is, the other content indicated by the first indication information is prioritized to be determined as retention or release. For example, when the indication is retained, that is, the first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the second release indication information but there is no second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, it is further determined whether the secondary cell group where the candidate primary and secondary cell is located is the same as the secondary cell group where the source primary and secondary cell is located. If the same, it is determined to retain the SCG LTM candidate primary and secondary cell configuration information.

[0072] Optionally, the method further includes: when an eighth condition is met, releasing the SCG LTM candidate primary and secondary cell configuration information, where the eighth condition is at least one of the following conditions:

[0073] 1. The first indication information includes the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0074] 2. The first indication information includes the second retention indication information, and the second retention indication information does not include the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0075] 3. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located.

[0076] 4. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the secondary cell group where the candidate primary and secondary cell is located is different from the secondary cell group where the source primary and secondary cell is located.

[0077] That is to say, the terminal device can determine whether to retain or release the SCG LTM candidate primary and secondary cell configuration information based on the indication in the first indication information that the terminal device independently determines whether to retain or release the SCG LTM candidate primary and secondary cell configuration information, and further determine whether at least one of the above-mentioned eighth conditions is met according to another content indicated by the first indication information when the primary cell is changed at the same time, and release the SCG LTM candidate primary and secondary cell configuration information when it is determined that it is met. In this way, the terminal device can selectively release the SCG LTM candidate primary and secondary cell configuration information in a timely manner to reduce the terminal load.

[0078] As before, further consideration is given to the feature that the primary and secondary cells assist the primary cell in providing network services. That is, in the dual-connection state, when the LTM change occurs in the primary cell, the primary and secondary cells will adaptively change. Therefore, when another content indicated by the first indication information indicates release, that is, the first indication information includes the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the second retention indication information but there is no second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then it is directly determined that the SCG LTM candidate primary and secondary cell configuration information is released. When retention is indicated, that is, the first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, or includes the second release indication information but there is no second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information to be determined, then it is further determined whether the secondary cell group where the candidate primary and secondary cell is located is the same as the secondary cell group where the source primary and secondary cell is located. If they are the same, then it is determined to release the SCG LTM candidate primary and secondary cell configuration information.

[0079] Optionally, the method further includes: sending third indication information to the target primary cell network device, where the third indication information is used to indicate that the target primary cell network device terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

[0080] That is to say, when a simultaneous primary cell change occurs, the terminal device can, based on the connection with the target primary cell network device and on the basis of receiving the first indication information sent by the primary cell network device, send a third indication information to the corresponding target primary cell network device if it decides to release the SCG LTM candidate primary and secondary cell configuration information. The release status of the SCG LTM candidate primary and secondary cell configuration information is transmitted to the corresponding target primary cell network device based on the third indication information, which is conducive to the primary cell network device to timely configure the SCG LTM candidate primary and secondary cell configuration information when triggering the LTM mechanism for the terminal device in the future.

[0081] As mentioned above, the specific content indicated in the third indication information can be any identifier representing "released", such as a number or field or other form, and this application does not limit this.

[0082] In combination with the first aspect, in certain implementations of the first aspect, the first indication information is carried in the radio resource control RRC reconfiguration information; or, the first indication information is carried in the CPC configuration information, and the CPC configuration information is carried in the radio resource control RRC reconfiguration information.

[0083] In a second aspect, embodiments of the present application provide a method for processing candidate cell configuration information, which can be executed by a primary cell network device, or by a component (such as a chip or circuit) configured in the primary cell network device. This application does not limit this.

[0084] 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 SCG LTM candidate primary and secondary cell configuration information when a CPC primary and secondary cell change occurs in the terminal device.

[0085] That is to say, how the terminal device retains or releases the SCG LTM candidate primary and secondary cell configuration information needs to be triggered by the primary cell network device. Therefore, based on the primary cell network device sending the first indication information to the terminal device, it can ensure that the terminal device quickly learns the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when the CPC primary and secondary cell changes, so that the terminal device can retain or release the SCG LTM candidate primary and secondary cell configuration information in a timely manner according to the first indication information, effectively improving the timeliness of retaining or releasing the SCG LTM candidate primary and secondary cell configuration information.

[0086] 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:

[0087] (1) First retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information.

[0088] (2) First release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information.

[0089] (3) First reserved common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0090] (4) First release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0091] In combination with the second aspect, in certain implementations of the second aspect, the first indication information includes: indication information for the terminal device to autonomously process the SCG LTM candidate primary and secondary cell configuration information; and the secondary cell group where each SCG LTM candidate primary and secondary cell is located.

[0092] Optionally, the method further includes: receiving second indication information sent by the terminal device, where the second indication information is used to indicate that the primary cell network device and the terminal device have released the SCG LTM candidate primary and secondary cell configuration information.

[0093] That is, when the terminal device releases the SCG LTM candidate primary and secondary cell configuration information on its own, the primary cell network device needs to be informed of the above release result. Therefore, the primary cell network device receives the second indication information formed by the terminal device based on the above release result, which is conducive to timely knowing the release result, thereby timely collecting the SCG LTM candidate primary and secondary cell configuration information in the subsequent LTM mechanism.

[0094] In combination with the second aspect, in certain implementations of the second aspect, the first indication information further includes: second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously. Alternatively, second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously occurs.

[0095] Optionally, if the first indication information includes indication information that the terminal device autonomously processes the SCG LTM candidate primary and secondary cell configuration information, the method also includes: receiving third indication information sent by the terminal device, the third indication information being used to indicate that the target primary cell network device terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

[0096] That is to say, when a primary cell is changed simultaneously and the terminal device releases the SCG LTM candidate primary and secondary cell configuration information by itself, the corresponding target primary cell network device needs to be informed of the above release result. Therefore, the target primary cell network device receives the third indication information formed by the terminal device based on the above release result, which is conducive to timely knowing the release result, thereby timely obtaining the SCG LTM candidate primary and secondary cell configuration information in the subsequent LTM mechanism.

[0097] In conjunction with the second aspect, in certain implementations of the second aspect, the first indication information is carried in radio resource control (RRC) reconfiguration information. Alternatively, the first indication information is carried in CPC configuration information, and the CPC configuration information is carried in radio resource control (RRC) reconfiguration information.

[0098] In a third aspect, a device for processing candidate cell configuration information is provided, comprising modules or units for executing the method in the first aspect and any possible implementation manner of the first aspect.

[0099] In a fourth aspect, a device for processing candidate 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.

[0100] In a fifth aspect, a device for processing candidate 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.

[0101] In one implementation, the device for processing the candidate cell configuration information is a terminal device. When the device for processing the candidate cell configuration information is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0102] In another implementation, the device for processing the candidate cell configuration information is a chip configured in the terminal device. When the device for processing the candidate cell configuration information is a chip configured in the terminal device, the communication interface may be an input / output interface.

[0103] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0104] In a sixth aspect, a device for processing candidate 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.

[0105] In one implementation, the device for processing the candidate cell configuration information is a primary cell network device. When the device for processing the candidate cell configuration information is a primary cell network device, the communication interface may be a transceiver, or an input / output interface.

[0106] In another implementation, the device for processing the candidate cell configuration information is a chip configured in the primary cell network device. When the device for processing the candidate cell configuration information is a chip configured in the primary cell network device, the communication interface may be an input / output interface.

[0107] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] Optionally, there are one or more processors and one or more memories.

[0112] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] In the ninth aspect, an embodiment of the present application provides a terminal device, including a processor, a memory and a transceiver, the transceiver is used to send and receive data, the memory is used to store code instructions, and the processor is used to run the code instructions. When executing the code 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.

[0117] In the tenth aspect, an embodiment of the present application provides a primary cell network device, comprising a processor, a memory, and a transceiver, the transceiver being used to send and receive data, the memory being used to store code instructions, the processor being used to run the code instructions, and the processor being used to instruct the terminal device to execute the method described in the above-mentioned second aspect and any possible implementation method of the second aspect when executing the code instructions stored in the memory.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.).

[0122] 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

[0123] FIG1 is a schematic diagram of the architecture of a communication system 100 used in an embodiment of the present application;

[0124] FIG1a is a diagram exemplarily illustrating signaling interactions between a terminal device and various network devices in a CPC process;

[0125] FIG1b is a diagram exemplarily illustrating signaling interactions between a terminal device and each network device in an SCG LTM process;

[0126] FIG1c is a diagram exemplarily illustrating signaling interactions between a terminal device and various network devices in a CHO process;

[0127] FIG2 is a schematic flowchart of a method 200 for processing candidate cell configuration information provided by an embodiment of the present application, shown from the perspective of device interaction;

[0128] 3 shows a diagram of signaling interactions between a terminal device and each network device when only CPC occurs and the decision is made by the primary cell network device in an embodiment of the present application from the perspective of device interaction;

[0129] FIG4 shows a diagram of signaling interactions between a terminal device and various network devices when only CPC occurs and the decision is made by the terminal device in an embodiment of the present application from the perspective of device interaction;

[0130] 5 shows a diagram of signaling interactions between a terminal device and each network device when CPC and a primary cell are changed simultaneously and a decision is made by a primary cell network device in an embodiment of the present application from the perspective of device interaction;

[0131] 6 shows a diagram of signaling interactions between a terminal device and each network device when CPC and a primary cell are changed simultaneously and the decision is made by the terminal device in an embodiment of the present application from the perspective of device interaction;

[0132] FIG7 is a schematic block diagram of a device 10 for processing candidate cell configuration information provided in an embodiment of the present application;

[0133] FIG8 is a schematic diagram of a possible structure of a terminal device 3000 provided in an embodiment of the present application;

[0134] FIG9 is a schematic diagram of a possible structure of a primary cell network device 4000 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0135] To facilitate understanding of the method, device, storage medium, and product for processing candidate cell configuration information provided in the embodiments of the present application, the method for processing candidate 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.

[0136] The technical solutions of the embodiments of the present application can be applied to dual-connection communication scenarios in various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), 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 (M2C), etc. type communication (MTC), Internet of Things (IoT), Long Term Evolution-Machine (LTE-M), Machine to Machine (M2M), etc.

[0137] 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, in a dual-connection state, the communication system 100 may include at least one terminal device, such as the terminal device 110 shown in Figure 1. It may also include at least one primary cell network device, such as the primary cell network device 120 shown in Figure 1. The terminal device 110 may be mobile or fixed. The 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 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).

[0138] Figure 1 exemplarily shows a terminal device and a primary cell network device. Optionally, 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 range of the primary cell network device and 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.

[0139] Each of the above-mentioned communication devices, such as the terminal device 110 and the 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.

[0140] 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.

[0141] 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: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved NodeB, or Home Node B, HNB), Base Band Unit (BBU), Access Point (AP) in Wireless Fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., and can also be a gNB in ​​5G, such as NR, system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) 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 (DU), etc.

[0142] 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 may be classified as a network device in a core network (core network, CN), which is not limited in this application.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] This application does not limit the specific form of the terminal device.

[0148] To facilitate understanding of the embodiments of the present application, a brief explanation of the terms involved in the present application is first given.

[0149] 1. Dual connection: In order to ensure the network service quality of the terminal device, the method of using the primary and secondary cells in the secondary cell group to assist the primary cell in the primary cell group is used to provide network services for the terminal device, so that the terminal device is connected to two network devices at the same time, that is, dual connection.

[0150] 2. Primary cell group: In the dual connectivity state, the primary cell group is a group formed by at least one primary cell that has a control connection with the core network.

[0151] 3. Primary cell: In dual connectivity, the primary cell is a cell belonging to the primary cell group and is used to initiate initial access.

[0152] 4. Secondary cell group: In the dual connectivity state, the secondary cell group is a group formed by the primary and secondary cells and at least one secondary cell, and the secondary cell group may or may not have a control connection with the core network.

[0153] 5. Primary and secondary cells: In the dual-connection state, the primary and secondary cells are cells belonging to the secondary cell group and are used to perform initial access under the secondary cell group.

[0154] It should be noted that, for different primary cells or different primary and secondary cells, the cell may be an area within the coverage range of the wireless network of the corresponding network device. In the embodiment of the present application, different cells may correspond to the same or different network devices. For example, the network device to which cell #1 belongs and the network device to which cell #2 belongs may be different network devices, such as a base station. That is, cell #1 and cell #2 may be managed by different base stations. Or, for another example, the network device that manages cell #1 and the network device that manages cell #2 may also be different radio frequency processing units of the same base station, such as a radio remote unit (RRU). That is, cell #1 and cell #2 may be managed by the same base station, have the same baseband processing unit and intermediate frequency processing unit, but have different radio frequency processing units. Or, for another example, the network device to which cell #1 belongs and the network device to which cell #2 belongs may be the same network device, such as a base station. That is, cell #1 and cell #2 may be managed by the same base station. In this case, it can be said that cell #1 and cell #2 are co-located. This application does not specifically limit this.

[0155] As mentioned above, in some possible deployments, a gNB may include both a CU and a DU. In this deployment, cell #1 and cell #2 can be managed by the same CU and the same DU, i.e., they share both the CU and the DU. Cell #1 and cell #2 can also be managed by the same CU and different DUs, i.e., they share both the CU and the DU. Cell #1 and cell #2 can also be managed by different CUs and different DUs, i.e., they share neither the CU nor the DU.

[0156] 6. Conditional primary and secondary cell change: CPC, is the process of switching from the current primary and secondary cell to a candidate primary and secondary cell when the terminal device is in dual connectivity due to changes in service conditions or channel quality.

[0157] FIG1a is a diagram showing an exemplary signaling interaction between a terminal device and each network device in a CPC process. The CPC process is briefly described below with reference to FIG1a. The CPC process may specifically include S1001 to S1011 below.

[0158] S1001. The primary cell network device determines to execute CPC.

[0159] S1002: The primary cell network device sends an SgNB (Secondary gNodeB) addition request to the candidate primary and secondary cell network devices. The candidate primary and secondary cells include the target primary and secondary cells and potential target primary and secondary cells.

[0160] S1003. The candidate primary and secondary cell network device responds to the SgNB add request based on the candidate primary and secondary cell configuration information and execution conditions. There may be one or more candidate primary and secondary cells.

[0161] S1004. The primary cell network device sends the candidate primary and secondary cell configuration information and execution conditions to the terminal device through an RRC reconfiguration message.

[0162] S1005: The terminal device sends a first RRC reconfiguration message to the primary cell network device. The first RRC reconfiguration message is used to instruct the primary cell network device that the terminal device completes the RRC reconfiguration.

[0163] S1006. The terminal device evaluates the configuration information and execution conditions of the candidate primary and secondary cells to determine the target primary and secondary cells.

[0164] S1007: The terminal device sends a second RRC reconfiguration message to the primary cell network device. The second RRC reconfiguration message is used to instruct the primary cell network device and the terminal device to determine a target primary and secondary cell.

[0165] S1008. The primary cell network device sends an SgNB release request to the source primary and secondary cell network devices and the potential target primary and secondary cell network devices.

[0166] S1009. The source primary and secondary cell network equipment and the potential target primary and secondary cell network equipment send an SgNB release confirmation message to the primary cell network equipment.

[0167] S1010. The primary cell network device sends a second RRC reconfiguration message to the target primary and secondary cell network devices.

[0168] S1011. The terminal device initiates a random access process to the target primary and secondary cell network devices. At this point, the CPC process is completed.

[0169] The execution condition can be any one of Event A3, Event A4, and Event A5, or any two of them, or all of them. Event A3, Event A4, and Event A5 trigger a handover. Event A4, Event A5, Event A3, and Event A4 trigger a handover. Event A4, Event A5, Event A5, and Event A4 trigger a handover. Event A5, Event A5, Event A5, Event A5, Event A3, Event A4, and Event A5 trigger a handover.

[0170] It should be understood that the execution conditions adopted by different candidate primary and secondary cells may be the same or different, and this application does not limit this.

[0171] 7. Secondary Cell Group Layer 1 / 2 Triggered Mobility: also known as SCG LTM, is the process in which the original cell network equipment performs cell handover on 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.

[0172] Figure 1b is a diagram showing an exemplary signaling interaction between a terminal device and each network device in the SCG LTM process. The SCG LTM process is briefly described below with reference to Figure 1b. The SCG LTM process may specifically include S1101 to S1112 below.

[0173] S1101. The terminal device sends L1 measurement results to the source primary and secondary cell network devices.

[0174] S1102. The source primary and secondary cell network equipment determines to perform LTM switching.

[0175] S1103: The source primary and secondary cell network device sends an LTM handover request to the candidate primary and secondary cell network devices. The candidate primary and secondary cells include the target primary and secondary cells and potential target primary and secondary cells.

[0176] S1104: The candidate primary and secondary cell network device responds to the source primary and secondary cell network device's LTM handover request based on the candidate primary and secondary cell configuration information.

[0177] S1105: The source primary and secondary cell network device sends an RRC reconfiguration message to the terminal device. The RRC reconfiguration message includes configuration information of the candidate primary and secondary cells. The RRC reconfiguration message is used to instruct the terminal device to perform uplink and downlink synchronization processes on the candidate primary and secondary cells.

[0178] S1106. The terminal device sends an RRC reconfiguration completion message to the source primary and secondary cell network devices.

[0179] S1107. The terminal device performs a downlink synchronization process on the candidate primary and secondary cells.

[0180] S1108. The terminal device performs an uplink synchronization process on the candidate primary and secondary cells.

[0181] S1109. The terminal device sends the L1 measurement result to the source primary and secondary cell network device, so that the source primary and secondary cell network device determines the target primary and secondary cell.

[0182] S1110. The source primary and secondary cell network device sends an LTM switching instruction to the terminal device.

[0183] S1111. The terminal device disconnects from the network device of the source primary and secondary cells.

[0184] S1112. The terminal device performs a random access process to the target primary and secondary cell network devices to complete the LTM switching.

[0185] The LTM switching instruction may include MAC CE indication information, and the MAC CE indication information may include: timing advance TA, transmission configuration indication TCIstate id, random access process CFRA resource information, and candidate cell configuration information identifier.

[0186] It should be understood that when the timing advance 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.

[0187] It should also be understood that if the MAC CE indication information includes a specific value of the timing advance 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, and the specific sending content is not limited in this application. If the MAC CE indication information does not include a specific value of the timing advance TA, the terminal device can measure the timing advance 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, and the specific sending content is not limited in this application.

[0188] 8. Conditional primary cell change: CHO is the process of switching from the current primary cell to a candidate primary cell when the terminal device is in dual connectivity due to changes in service conditions or channel quality.

[0189] FIG1c is a diagram showing an exemplary signaling interaction between a terminal device and each network device in a CHO process. The CHO process is briefly described below with reference to FIG1c. The CHO process may specifically include S1201 to S1209 below.

[0190] S1201. The terminal device sends measurement results to the source primary cell network device.

[0191] S1202: The source primary cell network device determines to perform CHO based on the measurement result.

[0192] S1203: The source primary cell network device sends a handover request to the candidate primary cell network devices. The candidate primary cells include the target primary cell and the target potential primary cell.

[0193] S1204: The candidate primary cell network device responds to the handover request to the source primary cell network device based on the candidate primary cell configuration information and the execution condition.

[0194] S1205. The source primary cell network device sends the candidate primary cell configuration information and execution conditions to the terminal device through an RRC reconfiguration message.

[0195] S1206. The terminal device sends an RRC reconfiguration completion message to the source primary cell network device.

[0196] S1207: The terminal device performs CHO evaluation based on the candidate primary cell configuration information and execution conditions to determine a target primary cell.

[0197] S1208. The terminal device disconnects from the network device of the source primary cell.

[0198] S1209: The terminal device is connected to the target primary cell network device, thus completing the CHO process.

[0199] The CHO execution condition configuration information can be any one of Event A3, Event A4, and Event A5, or any two of them, or all three. Event A3 means the quality of the neighboring cell is better than the original cell; this event triggers a handover. Event A4 means the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover. Event A5 means the quality of the original cell is less than an absolute threshold, while the quality of the neighboring cell is greater than an absolute threshold; this event triggers a handover.

[0200] It should be understood that the CHO execution condition configuration information adopted by different candidate primary and secondary cells may be the same or different, and this application does not limit this.

[0201] 9. Release: In the dual-connection state, the terminal device needs to be configured with CPC configuration information and LTM configuration information at the same time. When the CPC process is triggered, in order to reduce the operating load of the terminal device, it is hoped that the terminal device can cancel the configuration of LTM configuration information, that is, release the LTM configuration information.

[0202] 10. Retention: In dual-connection mode, the terminal device must be configured with both CPC and LTM configuration information. To reduce the latency associated with resending the LTM configuration information when the LTM process may be triggered later, the terminal device is expected to continue saving the LTM configuration information, i.e., retain the LTM configuration information.

[0203] It should be understood that the above CPC configuration information and LTM configuration information are CPC configuration information and LTM configuration information of the candidate cells. In the same CPC process, the release or retention of different candidate cells may be the same or different, and this application does not limit this.

[0204] 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.

[0205] To facilitate understanding of the embodiments of the present application, the following description is first made:

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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" may mean saving in one or more memories. One or more memories may be set separately or integrated in an encoder or decoder, a processor, or a processing device for candidate cell configuration information. One or more memories may also be partially set separately and partially integrated in a decoder, a processor, or a processing device for candidate cell configuration information. The type of memory may be any form of storage medium, and this application does not limit it.

[0213] The predefined in this application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0214] 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.

[0215] 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.

[0216] The terminal device will inevitably involve changes in the primary and secondary cells and / or the primary cell when in a dual-connection state. Currently, a topic worthy of attention is how to properly handle the SCG LTM candidate cell configuration information during the CPC change for the terminal device that stores both the SCG LTM candidate cell configuration information and the CPC candidate cell configuration information. In this regard, a method has been proposed, that is, after executing the CPC change, artificially triggering an indication to retain or release the SCG LTM candidate cell configuration information through the network side, and sending the indication to the terminal device, and the terminal device executes the retention or release of the SCG LTM candidate cell configuration information according to the indication, resulting in a lower timeliness of the retention or release, thereby increasing the load on the terminal device, causing additional waste of resources and delay overhead. In this regard, an embodiment of the present application provides a method for processing candidate cell configuration information, and its main inventive ideas are as follows:

[0217] To improve the timeliness of retention or release, instead of manually triggering the network-side indication of retaining or releasing the SCG LTM candidate cell configuration information after the CPC change is executed, the primary cell network equipment indicates the processing strategy for the SCG LTM candidate cell configuration information through indication information before the terminal device executes the CPC change. This allows the terminal device to automatically retain or release the SCG LTM candidate cell configuration information according to the processing strategy when it determines to perform a conditional CPC cell change. This achieves effective management of the SCG LTM candidate primary and secondary cell configuration information, improves the timeliness of retention or release, and thus reduces the load on the terminal device, avoiding additional resource waste and delay overhead.

[0218] The method provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0219] 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.

[0220] 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.

[0221] Figure 2 is a schematic flow chart illustrating a method 200 for processing candidate cell configuration information provided by an embodiment of the present application from the perspective of device interaction. As shown in Figure 2 , the method 200 may include steps 210 to 220. Each step in the method 200 is described in detail below.

[0222] In step 210, the primary cell network device sends first indication information to the terminal device, where the first indication information is used to indicate the terminal device a processing strategy for SCG LTM candidate primary and secondary cell configuration information when the CPC of the primary and secondary cells changes under certain conditions.

[0223] It should be noted that the first indication information does not limit the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when CPC occurs in the terminal device. The following describes the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when CPC occurs in the terminal device.

[0224] In one example, the first indication information may include device information for controlling the processing method and information required for the device to instruct the terminal to process the SCG LTM candidate primary and secondary cell configuration information. This method can more clearly indicate the processing strategy for the SCG LTM candidate primary and secondary cell configuration information.

[0225] In another example, only the information required for processing can be included. Because different devices control the processing method, the information required for processing also varies. Therefore, the device controlling the processing method and the specific processing method can be determined based on the type of information required for processing. This method can effectively save transmission resources.

[0226] In another example, if the device controlling the processing mode is a 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 by the device. Conversely, in another example, if the device controlling the processing mode is a 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 approaches can make the indication information more flexible.

[0227] The information required for processing may also vary based on the device controlling the processing method. For example, when the device controlling the processing method is a primary cell network device, the information required for processing may include information on the processing method for the SCG LTM candidate primary and secondary cell configuration information or other information. When the device controlling the processing method is a terminal device, the information required for processing may include information related to the SCG LTM candidate primary and secondary cells or other information.

[0228] It should be understood that the specific methods listed above for instructing the terminal device to determine the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when CPC occurs are only examples and should not constitute any limitation to this application. This application does not limit the specific method of how the network device instructs the terminal device to determine the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when CPC occurs.

[0229] It should be understood that the first indication information may be irrelevant to or related to the CPC target primary and secondary cells to be changed.

[0230] In one example, regardless of the CPC target primary and secondary cells, the SCG LTM candidate primary and secondary cell configuration information can be processed based on the same first indication information. This approach allows for unified first indication information to be transmitted during first indication information transmission, effectively saving transmission resources.

[0231] In another example, corresponding first indication information can be associated with each CPC candidate primary and secondary cell. That is, when different CPC primary and secondary cells are used as CPC target primary and secondary cells, the indication information associated therewith can be different. Therefore, the processing strategy for SCG LTM candidate primary and secondary cell configuration information can also be different for different CPC target primary and secondary cells. This approach allows for more refined management of SCG LTM candidate primary and secondary cell configuration information.

[0232] The following describes a method for transmitting the first indication information.

[0233] For example, the first indication information may be carried in radio resource control (RRC) reconfiguration information. Specifically, when the CPC candidate primary and secondary cell configuration information is sent to the terminal device via the RRC reconfiguration information, it may be sent to the terminal device together with the first indication information. In this case, the first indication information may be a predefined field in the RRC reconfiguration information. The CPC configuration information includes candidate primary and secondary cell configuration information and CPC execution condition configuration information, and the candidate primary and secondary cells may be one or more.

[0234] For another example, the first indication information may be carried in CPC configuration information, and the CPC candidate primary and secondary cell configuration information may be carried in radio resource control (RRC) reconfiguration information. Specifically, the first indication information is associated with the corresponding CPC candidate primary and secondary cell configuration information and stored, the first indication information is indicated by a predefined field in the CPC candidate primary and secondary cell configuration information, and the CPC candidate primary and secondary cell configuration information is then indicated by a defined field in the RRC reconfiguration information.

[0235] For another example, the first indication information can be sent to the terminal device as an independent signaling through the primary cell network device, and sent to the terminal device at the same time as the RRC reconfiguration information. "Sending at the same time" can be a time point or a time period, which is not limited in this application.

[0236] It should be understood that the primary cell network device can also send the execution conditions of the CPC candidate primary and secondary cells. The execution condition can be any one of event A3, event A4, and event A5, or can be any two of event A3, event A4, and event A5, or can be event A3, event A4, and event A5. Among them, event A3 means that the quality of the neighboring cell is better than the original cell, and the occurrence of this event will trigger switching. Event A4 means that the quality of the neighboring cell is greater than an absolute threshold, and the occurrence of this event will trigger switching. Event A5 means 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 switching.

[0237] It should also be understood that in the above examples, the CPC execution conditions adopted by different candidate primary and secondary cells may be the same or different, and this application does not limit this.

[0238] In step 220, when the terminal device determines the CPC target primary and secondary cell to be changed to, it retains or releases the SCG LTM candidate primary and secondary cell configuration information according to the first indication information.

[0239] In other words, the prerequisite for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information is that the terminal device has determined the CPC target primary and secondary cell to which it is to be changed. The CPC target primary and secondary cell is the primary and secondary cell to which the CPC process ultimately switches. The following briefly describes the steps for the terminal device to determine the CPC target primary and secondary cell.

[0240] That is, the terminal device obtains the CPC candidate primary and secondary cell configuration information and execution conditions corresponding to each candidate primary and secondary cell in the RRC reconfiguration information, and makes a CPC decision based on the CPC candidate primary and secondary cell configuration information and execution conditions. For example, it determines whether the quality of the current candidate primary and secondary cell is better than the source primary and secondary cell. If so, a handover is triggered. Alternatively, it determines whether the quality of the current candidate primary and secondary cell is greater than an absolute threshold. If so, a handover is triggered. Alternatively, it determines whether the quality of the current candidate primary and secondary cell is less than an absolute threshold and greater than an absolute threshold at the same time. If so, a handover is triggered. In this way, the candidate primary and secondary cells that currently meet the corresponding CPC execution conditions are determined, and a candidate primary and secondary cell is selected from the candidate primary and secondary cells that meet the conditions as the CPC target primary and secondary cell.

[0241] It should be understood that since the CPC execution conditions adopted by different candidate primary and secondary cells can be the same or different, the above judgment types can be executed one by one or multiple by one at the same time in one CPC process, and this application does not limit this.

[0242] Therefore, the method for processing candidate cell configuration information provided in the embodiment of the present application has provided the terminal device with a processing strategy for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information before CPC occurs, namely, the first indication information. When the terminal device determines the CPC target primary and secondary cell to be changed to, it can retain or release the SCG LTM candidate primary and secondary cell configuration information according to the first indication information.

[0243] Therefore, the technical solution provided in the present application provides the terminal device with indication information of the processing strategy for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information before the CPC occurs. Then, when determining the CPC target primary and secondary cell to be changed to, the SCG LTM candidate primary and secondary cell configuration information can be promptly retained or released based on the first indication information, without having to wait until the CPC occurs to determine whether to retain or release the SCG LTM candidate primary and secondary cell configuration information, or to retain or release it based on human instructions, thereby effectively improving the timeliness of retaining or releasing the SCG LTM candidate primary and secondary cell configuration information.

[0244] In the method of the present application, as shown in Figures 1a and 1c, when the terminal device is in a dual-connection state, the main cell network device decides to execute CPC, and when obtaining CPC candidate cell configuration information and execution conditions from the candidate main and auxiliary cells, there is a possible situation that the main cell also decides to execute CHO. Therefore, when the indication information indicates the processing strategy for the SCG LTM candidate main and auxiliary cell configuration information when CPC occurs, it involves two scenarios. The first scenario is the processing strategy for the SCG LTM candidate main and auxiliary cell configuration information when only CPC occurs. The second scenario is that a simultaneous change of the main cell occurs on the basis of CPC. Therefore, when the first indication information indicates the processing strategy for the SCG LTM candidate main and auxiliary cell configuration information when CPC occurs in the terminal device, it can indicate the processing strategy for the SCG LTM candidate main and auxiliary cell configuration information when only CPC occurs, and can also indicate the processing strategy for the SCG LTM candidate main and auxiliary cell configuration information when CPC and the main cell change simultaneously occur in the terminal device.

[0245] It should be understood that the content indicated by the first indication information in different scenarios is also different, and the primary cell network device can determine to send first indication information with different content based on different scenarios.

[0246] In the first scenario, the first indication information includes different information based on the different devices controlling the processing mode. First, the first indication information when the device controlling the processing mode is a primary cell network device is introduced.

[0247] In the first scenario, when the device controlling the processing mode is a primary cell network device, the first indication information includes at least one of the following information:

[0248] (1) First retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (2) First release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (3) First retention common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set. (4) First release common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0249] In other words, the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when CPC occurs, as indicated by the first indication information, is determined based on the specific content of the first indication information. For example, if the terminal device determines that the specific content of the first indication information is the first retention indication information in (1), the corresponding SCG LTM candidate primary and secondary cell configuration information is retained or released based on the first retention indication information. If the specific content of the first indication information is determined to be the first release indication information in (2), the corresponding SCG LTM candidate primary and secondary cell configuration information is retained or released based on the first release indication information. If the specific content of the first indication information is determined to be the first retention public indication information in (3), the corresponding SCG LTM candidate primary and secondary cell configuration information is retained or released based on the first retention public indication information. If the specific content of the first indication information is determined to be the first release public indication information in (4), the corresponding SCG LTM candidate primary and secondary cell configuration information is retained or released based on the first release public indication information.

[0250] The first retention indication information is information indicating the retention of at least one SCG LTM candidate primary and secondary cell configuration information. The first release indication information is information indicating the release of at least one SCG LTM candidate primary and secondary cell configuration information. The first public retention indication information is information indicating the retention of at least one SCG LTM candidate primary and secondary cell configuration information in units of a secondary cell set. The first public release indication information is information indicating the release of at least one SCG LTM candidate primary and secondary cell configuration information in units of a secondary cell set.

[0251] The first retention public indication information indicates that at least one SCG LTM candidate primary and secondary cell in the secondary cell set adopts this public retention indication information. Then, the at least one SCG LTM candidate primary and secondary cell is preserved when CPC occurs. The first release public indication information indicates that at least one SCG LTM candidate primary and secondary cell in the secondary cell set adopts this public release indication information. Then, the at least one SCG LTM candidate primary and secondary cell is released when CPC occurs.

[0252] It should be understood that "the first retention or release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information" can be specifically implemented by associating the candidate primary and secondary cells corresponding to each SCG LTM candidate primary and secondary cell configuration information and the corresponding first retention or release indication information. For example, a mapping relationship is established between each candidate primary and secondary cell identifier and the corresponding first retention or release indication information. Similarly, "the first retention or release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information expressed in the form of a secondary cell set" can be specifically implemented by associating the secondary cell set to which the candidate primary and secondary cells corresponding to each SCG LTM candidate primary and secondary cell configuration information belong and the corresponding first retention or release public indication information. For example, first determine the secondary cell set to which the candidate primary and secondary cells corresponding to each SCG LTM candidate primary and secondary cell configuration information belong, and then establish a mapping relationship between each secondary cell set identifier and the corresponding first retention or release public indication information.

[0253] Among them, the above-mentioned indication information related to "retention" or "release" is information indicating the retention or release of at least one SCG LTM candidate primary and secondary cell configuration information, for example, it can be a field of "retention" or "release", or it can be a number, letter or other information representing "retention" or "release", and this application does not limit this. Moreover, the above-mentioned candidate primary and secondary cell identifier is an identifier indicating the identity of the candidate primary and secondary cell, for example, it can be the name of the candidate primary and secondary cell, or it can be a number, letter or other information representing the identity of the candidate primary and secondary cell, and this application does not limit this. Moreover, the above-mentioned secondary cell set identifier is an identifier indicating the identity of the secondary cell set, for example, it can be the name of the secondary cell set, or it can be a number, letter or other information representing the identity of the secondary cell set, and this application does not limit this.

[0254] It should be understood that the above-mentioned process of forming the first retention or release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information, and the process of forming the first retention or release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information are merely examples and should not constitute any limitation to this application.

[0255] It should be noted that when the first indication information includes only one of the above indication information, the specific meaning is as follows:

[0256] If the first indication information only includes the first retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information, it means that at least one SCG LTM candidate primary and secondary cell configuration information with the first retention indication information is retained, and at least one SCG LTM candidate primary and secondary cell configuration information without the first retention indication information is released. Similarly, if the first indication information only includes the first release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information, it means that at least one SCG LTM candidate primary and secondary cell configuration information with the first release indication information is released, and at least one SCG LTM candidate primary and secondary cell configuration information without the first release indication information is retained. Similarly, if it only includes the first retention public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set, it means that at least one SCG LTM candidate primary and secondary cell configuration information with the first retention public indication information is retained, and at least one SCG LTM candidate primary and secondary cell configuration information without the first retention public indication information is released. If it only includes the first release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set, it means that at least one SCG LTM candidate primary and secondary cell configuration information with the first release public indication information is released, and at least one SCG LTM candidate primary and secondary cell configuration information without the first release public indication information is retained.

[0257] It should also be understood that when the first indication information includes any of the above multiple items, one item may be used alone or in combination with the multiple items when determining the processing strategy for multiple SCG LTM candidate primary and secondary cell configuration information.

[0258] Then, when the terminal device determines the CPC target primary and secondary cell to be changed, it obtains the corresponding first indication information. After determining the content included in the first indication information, the terminal device determines the currently met conditions based on the content included in the first indication information, and retains or releases the SCG LTM candidate primary and secondary cell configuration information.

[0259] Specifically, when the first condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is retained. When the second condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is released.

[0260] Since there can be one or more SCG LTM candidate primary and secondary cells, the processing strategy for the configuration information of each SCG LTM candidate primary and secondary cell can be different in the case of multiple SCG LTM candidate primary and secondary cell configurations, that is, there is a possibility that part of the SCG LTM candidate primary and secondary cell configuration information is retained and part of the SCG LTM candidate primary and secondary cell configuration information is released. Therefore, in order to introduce it more clearly, the SCG LTM candidate primary and secondary cell configuration information to be determined is defined as the target SCG LTM candidate primary and secondary cell configuration information.

[0261] The following describes how to retain the SCG LTM candidate primary and secondary cell configuration information when the first condition is met, and how to release the SCG LTM candidate primary and secondary cell configuration information when the second condition is met.

[0262] When the first condition is met, the first condition includes at least one of the following conditions:

[0263] 1. The first indication information includes first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0264] 2. The first indication information includes first release indication information and does not include first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0265] 3. The first indication information includes the first reserved common indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0266] 4. The first indication information includes the first release public indication information and does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0267] It should be noted that if the first condition includes only one of the above conditions, the specific meaning is as follows:

[0268] If the first indication information includes the first retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is retained. If the first indication information includes the first release indication information and the first release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the first release indication information, the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the first retention public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is retained. If the first indication information includes the first release public indication information and the first release public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located does not exist in the first release public indication information, the target SCG LTM candidate primary and secondary cell configuration information is retained.

[0269] It should also be understood that when the first condition includes any multiple items mentioned above, the target SCG LTM candidate primary and secondary cell configuration information is retained when it is determined that the multiple items are met.

[0270] For the above-mentioned retention operation, the corresponding SCG LTM candidate primary and secondary cell configuration information can be specifically continued to be stored. 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.

[0271] When the second condition is met, the second condition includes at least one of the following conditions:

[0272] 1. The first indication information includes first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0273] 2. The first indication information includes first retention indication information and does not include first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0274] 3. The first indication information includes first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0275] 4. The first indication information includes the first reserved public indication information and does not include the first reserved public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0276] It should be noted that when the second condition includes only one of the above conditions, the specific meaning is as follows:

[0277] If the first indication information includes the first release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is released. If the first indication information includes the first retention indication information and the first retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the first retention indication information, the target SCG LTM candidate primary and secondary cell configuration information is released. Similarly, if the first first indication information includes the first release public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is released. If the first indication information includes the first retention public indication information and the first retention public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located does not exist in the first retention public indication information, the target SCG LTM candidate primary and secondary cell configuration information is released.

[0278] It should also be understood that when the second condition includes any multiple items mentioned above, the target SCG LTM candidate primary and secondary cell configuration information is released when it is determined that the multiple items are met.

[0279] For the above-mentioned release operation, the corresponding SCG LTM candidate primary and secondary cell configuration information can be deleted, or the corresponding SCG LTM candidate primary and secondary cell configuration information can be released in other ways. This application does not limit this.

[0280] This method for processing candidate cell configuration information in this scenario configures corresponding retention or release indications for each SCG LTM candidate primary and secondary cell configuration information in the first indication information in a separate or collective configuration manner, which enables the terminal device to clearly determine that the device controlling the processing method is the primary cell network device based on the information type included in the first indication information, and can effectively save transmission resources.

[0281] This method of processing candidate cell configuration information in this scenario enables the terminal device to determine whether any of the above-mentioned first conditions or any of the above-mentioned second conditions are currently met based on the specific content indicated by the first indication information in this scenario. Thus, when it is determined that the first condition is met, the SCG LTM candidate primary and secondary cell configuration information is retained, and when it is determined that the second condition is met, the SCG LTM candidate primary and secondary cell configuration information is released. As a result, the terminal device can selectively retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner to meet the subsequent LTM mechanism switching requirements, and can selectively release the SCG LTM candidate primary and secondary cell configuration information in a timely manner to reduce the terminal load in a timely manner.

[0282] As mentioned above, in the first scenario, the information included in the first indication information is different based on the different devices controlling the processing mode. The first indication information when the device controlling the processing mode is a terminal device is introduced.

[0283] In the first scenario, when the device controlling the processing mode is a terminal device, the first indication information includes the following information:

[0284] (1) Instruction information for the terminal device to autonomously process the configuration information of the SCG LTM candidate primary and secondary cells. (2) The secondary cell group to which each SCG LTM candidate primary and secondary cell belongs.

[0285] In other words, the processing strategy for the SCG LTM candidate primary and secondary cell configuration information when CPC occurs, as indicated by the first indication information, is determined based on the specific content of the first indication information. For example, if the terminal device determines that the specific content of the first indication information is (1) and (2), the terminal device determines to autonomously retain or release the SCG LTM candidate primary and secondary cell configuration information based on the secondary cell group to which each SCG LTM candidate primary and secondary cell belongs.

[0286] It should be understood that the specific form of the above-mentioned "indication information that the terminal device autonomously processes the configuration information of the SCG LTM candidate primary and secondary cells" can be a field of "autonomous processing", or can be any identification information that represents "autonomous processing", and this application does not limit this. And the above-mentioned "secondary cell group where each SCG LTM candidate primary and secondary cell is located" can be expressed in the name, number or other form of the secondary cell group where each SCG LTM candidate primary and secondary cell is located. Therefore, the secondary cell group where each SCG LTM candidate primary and secondary cell is located can be represented by the mapping relationship between the SCG LTM candidate primary and secondary cell and the secondary cell group where it is located, or by other forms, and this application does not limit this.

[0287] Then, when the terminal device determines the CPC target primary and secondary cell to be changed, it obtains the corresponding first indication information. After determining the content included in the first indication information, the terminal device determines the currently met conditions based on the content included in the first indication information, and retains or releases the SCG LTM candidate primary and secondary cell configuration information.

[0288] Specifically, when the fifth condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is retained. When the sixth condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is released.

[0289] The following describes how to retain the SCG LTM candidate primary and secondary cell configuration information when the fifth condition is met, and how to release the SCG LTM candidate primary and secondary cell configuration information when the sixth condition is met.

[0290] When the fifth condition is met, the fifth condition is: the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

[0291] The candidate primary and secondary cells refer to the candidate primary and secondary cells of the SCG LTM. Similarly, the source primary and secondary cells refer to the source primary and secondary cells of the SCG LTM.

[0292] It should be noted that when the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located, there is a high probability that the subsequent LTM cell handover will still be in the secondary cell group. At this time, the SCG LTM candidate primary and secondary cell configuration information should be retained. Therefore, whether the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located is determined based on whether the relevant identifiers of the secondary cell group where the candidate primary and secondary cells are located are the same as the secondary cell group where the source primary and secondary cells are located.

[0293] It should be understood that the above method of determining whether the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located is only an example and should not constitute any limitation to this application.

[0294] Then according to the above determination results, if the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located, it means that the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located. Considering the LTM cell switching characteristics, the SCG LTM candidate primary and secondary cell configuration information of the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located is retained.

[0295] When the sixth condition is met, the sixth condition is: the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located.

[0296] It should be noted that when the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located, it is impossible to determine whether the subsequent LTM cell switching has a high probability of still being in the secondary cell group. At this time, the SCG LTM candidate primary and secondary cell configuration information should be released. Then according to the above determination result, if the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located, for example, they do not have the same identifier, then it means that the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located. Considering the LTM switching characteristics, the SCG LTM candidate primary and secondary cell configuration information of the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located is released.

[0297] It should be understood that after the terminal device releases the SCG LTM candidate primary and secondary cell configuration information, the primary cell network device needs to reconfigure the SCG LTM candidate primary and secondary cell configuration information when the LTM mechanism is subsequently switched. This requires the primary cell network device to obtain relevant information about the released SCG LTM candidate primary and secondary cell configuration information. Therefore, the terminal device forms the second indication information based on the result of having released the SCG LTM candidate primary and secondary cell configuration information to indicate to the primary cell network device that the terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

[0298] The second indication information may be a string of specific fields formed according to the result of releasing the SCG LTM candidate primary and secondary cell configuration information, or may be in other forms, which is not limited in this application. The second indication information may be sent to the primary cell network device through the terminal device as an independent signaling, or may be sent to the primary cell network device in other forms, which is not limited in this application.

[0299] The method for processing the candidate cell configuration information in this scenario indicates in the first indication information that the terminal device makes its own decision, and indicates the secondary cell group where the configuration information of each SCG LTM candidate primary and secondary cell is located, so that the terminal device can also determine whether to retain or release the SCG LTM candidate primary and secondary cell configuration information based on the specific content indicated by the first indication information in this scenario, and can determine whether the fifth condition or the sixth condition is currently met based on the secondary cell group where the configuration information of each SCG LTM candidate primary and secondary cell is located, so that the SCG LTM candidate primary and secondary cell configuration information is retained when it is determined that the fifth condition is met, and the SCG LTM candidate primary and secondary cell configuration information is released when it is determined that the sixth condition is met. As a result, the terminal device can selectively retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner to meet the subsequent LTM mechanism switching requirements, and can selectively release the SCG LTM candidate primary and secondary cell configuration information in a timely manner to reduce the terminal load in a timely manner.

[0300] In this scenario, the method for processing the candidate cell configuration information is that the terminal device transmits the release status of the candidate primary and secondary cell configuration information in the SCG LTM to the primary cell network device by sending a second indication message to the primary cell network device indicating that the terminal device has released the candidate primary and secondary cell configuration information in the SCG LTM, which is beneficial for the terminal device to timely configure the SCG LTM candidate primary and secondary cell configuration information when the LTM mechanism is subsequently triggered.

[0301] In the second scenario, the first indication information includes different information based on the different devices controlling the processing mode. The first indication information when the device controlling the processing mode is a primary cell network device is introduced.

[0302] In the second scenario, when the device controlling the processing mode is a primary cell network device, considering the feature that the primary and secondary cells assist the primary cell in providing network services, if there is indication information for the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed at the same time, the indication information is given priority to determine the retention or release of the SCG LTM candidate primary and secondary cell configuration information, and the first indication information includes the following information:

[0303] Second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously. Or, second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a primary cell is changed simultaneously.

[0304] and at least one of the following information: (1) first retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (2) first release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (3) first retention common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set. (4) first release common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0305] The second retain indication information is information indicating retaining the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously. The second release indication information is information indicating releasing the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0306] It should be understood that the "second retention or release indication information corresponding to the configuration information of at least one SCG LTM candidate primary and secondary cell" can be specifically implemented by associating each candidate primary cell with the corresponding second retention or release indication information when the primary cell changes simultaneously. For example, a mapping relationship is established between each candidate primary cell identifier and the corresponding second retention / release indication information.

[0307] The specific form of the second retention or release indication information can be any identifier representing "retention" or "release", such as a number, field, or other form, and this application does not limit this. In addition, the above-mentioned candidate primary cell identifier is an identifier indicating the identity of the candidate primary cell, for example, it can be the name of the candidate primary cell, or it can be a number, letter, or other information representing the identity of the candidate primary cell, and this application does not limit this.

[0308] It should be understood that the above association process is only an example and should not constitute any limitation to this application.

[0309] Taking into account the characteristics of the primary and secondary cells assisting the primary cell in providing network services, when the primary cells are changed at the same time, whether the second release indication information or the second retention indication information is included in the first indication information is given priority to determine whether the corresponding SCG LTM candidate primary and secondary cell configuration information is retained or released. For example, when the first indication information includes the second release indication information, regardless of whether the first related indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information is retained or released, it is decided to release the SCG LTM candidate primary and secondary cell configuration information. When the first indication information includes the second retention indication information, it is necessary to further determine whether the first related indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information is retained or released, and retain the SCG LTM candidate primary and secondary cell configuration information when the first related indication information indicates retention, and release the SCG LTM candidate primary and secondary cell configuration information when the first related indication information indicates release.

[0310] The first relevant indication information is a summary of the first retention indication information, the first release indication information, the first retention public indication information, and the first release public indication information. When referring to the first relevant indication information, it can be understood as the first retention indication information, the first release indication information, the first retention public indication information, or the first release public indication information. It should not be understood separately from the first retention indication information, the first release indication information, the first retention public indication information, or the first release public indication information.

[0311] It should also be understood that the second retention indication information and the second release indication information are the contents included in the first indication information when a simultaneous change of the primary cell occurs. Therefore, if the first indication information includes the second retention indication information or the second release indication information, it means that a simultaneous change of the primary cell has occurred.

[0312] It should be noted that the first indication information includes “the second retention indication information or the second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously”, and further includes the above-mentioned first related indication information. The specific meaning is as follows:

[0313] First, it is explained that the first indication information includes the at least one first related indication information mentioned above on the basis of including "the second retention indication information corresponding to the configuration information of at least one SCG LTM candidate primary and secondary cell when the primary cell is changed simultaneously".

[0314] Specifically, if the first indication information includes the first retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information on the basis of the second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, then the at least one SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the first release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information on the basis of the second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, then the at least one SCG LTM candidate primary and secondary cell configuration information is released. Similarly, if the first indication information includes the first retention public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information on the basis of the second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, then the at least one SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and also includes the first release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information, then the at least one SCG LTM candidate primary and secondary cell configuration information is released.

[0315] Secondly, the first indication information includes "second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously" and further includes the above-mentioned first related indication information.

[0316] Specifically, if the first indication information includes the second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and also includes the first related indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information, then the at least one SCG LTM candidate primary and secondary cell configuration information is released.

[0317] It should also be understood that when the first indication information, in addition to including "the second retention or release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously", also includes any multiple of the above-mentioned first related indication information, when determining the processing strategy of the SCG LTM candidate primary and secondary cell configuration information, it can be determined based on the second retention or release indication information, in combination with one or multiple items.

[0318] Then, when the terminal device determines the CPC target primary and secondary cells and the target primary cell to be changed, it obtains the corresponding first indication information. After determining the content included in the first indication information, the terminal device determines the currently met conditions based on the content included in the first indication information, and retains or releases the SCG LTM candidate primary and secondary cell configuration information.

[0319] Specifically, when the third condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is retained. When the fourth condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is released.

[0320] As mentioned above, for a clearer introduction, the configuration information of the SCG LTM candidate primary and secondary cells to be determined is defined as the target SCG LTM candidate primary and secondary cell configuration information.

[0321] The following describes how to retain the SCG LTM candidate primary and secondary cell configuration information when the third condition is met, and how to release the SCG LTM candidate primary and secondary cell configuration information when the fourth condition is met.

[0322] When the third condition is met, the third condition includes at least one of the following conditions:

[0323] 1. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0324] 2. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention common indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0325] 3. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release indication information and does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information in the first release indication information.

[0326] 4. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information and does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

[0327] 5. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0328] 6. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first retained public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

[0329] 7. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release indication information and the first release indication information does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0330] 8. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information and the first release public indication information does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0331] It should be noted that when the third condition includes only one of the above conditions, the specific meaning is as follows:

[0332] If the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information and the first indication information includes the first retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information and the first indication information includes the first retention public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, and the first indication information includes the first release indication information and the first release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the first release indication information, the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, and the first indication information includes the first release public indication information and the first release public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located does not exist in the first release public indication information, then the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the first indication information includes the first retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, then the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the first indication information includes the first retention public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located, then the target SCG LTM candidate primary and secondary cell configuration information is retained. Similarly, if the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the first indication information includes the first release indication information and the first release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the first release indication information, the target SCG LTM candidate primary and secondary cell configuration information is retained.Similarly, if the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the first indication information includes the first release public indication information and the first release public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located does not exist in the first release public indication information, then the target SCG LTM candidate primary and secondary cell configuration information is retained.

[0333] It should also be understood that when the third condition includes any multiple items mentioned above, the target SCG LTM candidate primary and secondary cell configuration information is retained when it is determined that the multiple items are met.

[0334] When the fourth condition is met, the fourth condition includes at least one of the following conditions:

[0335] 1. The first indication information includes the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0336] 2. The first indication information includes the second retention indication information, and the second retention indication information does not include the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0337] 3. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0338] 4. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

[0339] 5. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information.

[0340] 6. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

[0341] It should be noted that when the fourth condition includes only one of the above conditions, the specific meaning is as follows:

[0342] If the first indication information includes the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is released regardless of whether the target SCG LTM candidate primary and secondary cell configuration information has the first related indication information or the first related indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information indicates retention or release. Similarly, if the first indication information includes the second retention indication information and the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second retention indication information, the target SCG LTM candidate primary and secondary cell configuration information is released regardless of whether the target SCG LTM candidate primary and secondary cell configuration information has the first related indication information or the first related indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information indicates retention or release. Similarly, if the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information and the first indication information includes the first release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is released. Similarly, if the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information and the first indication information includes the first release public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is released. Similarly, if the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the first indication information includes the first release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is released. Similarly, if the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the first indication information includes the first release public indication information of the secondary cell set where the target SCG LTM candidate primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is released.

[0343] It should also be understood that when the fourth condition includes any multiple items mentioned above, the target SCG LTM candidate primary and secondary cell configuration information is released when it is determined that the multiple items are met.

[0344] The method for processing candidate cell configuration information in this scenario configures the second retention or release indication information for each SCG LTM candidate primary and secondary cell configuration information in the first indication information when the primary cell is changed simultaneously, and configures the corresponding first related indication information for each SCG LTM candidate primary and secondary cell configuration information in a separate or collective configuration manner, so that the terminal can determine whether any of the above-mentioned third conditions or any of the above-mentioned fourth conditions are currently met according to the specific content indicated by the second retention or release indication information and the first related indication information when the primary cell is changed simultaneously. Thereby, the SCG LTM candidate primary and secondary cell configuration information is retained when it is determined that the third condition is met, and the SCG LTM candidate primary and secondary cell configuration information is released when it is determined that the fourth condition is met. As a result, the terminal device can selectively retain the SCG LTM candidate primary and secondary cell configuration information in a timely manner when the primary cell is changed simultaneously, meet the subsequent LTM mechanism switching requirements, and can selectively release the SCG LTM candidate primary and secondary cell configuration information in a timely manner to reduce the terminal load.

[0345] As before, in the second scenario, based on the different devices controlling the processing mode, the information included in the first indication information is also different. The first indication information when the device controlling the processing mode is a terminal device is introduced.

[0346] In the second scenario, when the device controlling the processing mode is a terminal device, considering the feature that the primary and secondary cells assist the primary cell in providing network services, if there is indication information for the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed at the same time, the indication information is given priority to determine the retention or release of the SCG LTM candidate primary and secondary cell configuration information, then the first indication information includes the following information:

[0347] When the primary cell is changed simultaneously, the second retention indication information or the second release indication information corresponding to the configuration information of at least one SCG LTM candidate primary and secondary cell is used.

[0348] And, (1) information indicating that the terminal device autonomously processes the configuration information of the SCG LTM candidate primary and secondary cells. (2) the secondary cell group to which each SCG LTM candidate primary and secondary cell belongs.

[0349] Taking into account the characteristics of the primary and secondary cells assisting the primary cell in providing network services, when the primary cell is changed at the same time, whether the second release indication information or the second retention indication information is included in the first indication information is given priority to determine whether the corresponding SCG LTM candidate primary and secondary cell configuration information is retained or released. For example, when the first indication information includes the second release indication information, after the terminal device determines that it wants to adopt its own decision to process the SCG LTM candidate primary and secondary cell configuration information, it will ignore the secondary cell group where each SCG LTM candidate primary and secondary cell is located, and decide to release the SCG LTM candidate primary and secondary cell configuration information. When the first indication information includes the second retention indication information, after the terminal device determines that it wants to adopt its own decision to process the SCG LTM candidate primary and secondary cell configuration information, it will further determine the secondary cell group where each SCG LTM candidate primary and secondary cell is located, and decide to retain or release the SCG LTM candidate primary and secondary cell configuration information according to the secondary cell group where each SCG LTM candidate primary and secondary cell is located.

[0350] When the second retention indication information is included in the first indication information, the SCG LTM candidate primary and secondary cell configuration information is retained or released according to the secondary cell group to which each SCG LTM candidate primary and secondary cell belongs, which may specifically include:

[0351] Determine whether the secondary cell group where the SCG LTM candidate primary and secondary cell corresponding to the SCG LTM candidate primary and secondary cell configuration information is located meets the retention or release conditions, and retain it if it meets the retention conditions, and release it if it meets the release conditions.

[0352] Then, when the terminal device determines the CPC target primary and secondary cells and the target primary cell to be changed, it obtains the corresponding first indication information. After determining the content included in the first indication information, the terminal device determines the currently met conditions based on the content included in the first indication information, and retains or releases the SCG LTM candidate primary and secondary cell configuration information.

[0353] Specifically, when the seventh condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is retained. When the eighth condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is released.

[0354] Since this scenario is that the terminal device independently decides whether to retain or release the SCG LTM candidate primary and secondary cell configuration information when the primary cells change simultaneously, it is considered that there can be one or more candidate primary cells, and in the case of multiple candidates, the processing strategy for each SCG LTM candidate primary and secondary cell configuration information when the primary cells change simultaneously may be different, that is, there is a possibility that the processing strategy for some SCG LTM candidate primary and secondary cell configuration information when the primary cells change simultaneously is to retain, and the processing strategy for some SCG LTM candidate primary and secondary cell configuration information when the primary cells change simultaneously is to release. Therefore, in order to introduce it more clearly, the SCG LTM candidate primary and secondary cell configuration information to be determined is defined as the target SCG LTM candidate primary and secondary cell configuration information.

[0355] The following describes how to retain the SCG LTM candidate primary and secondary cell configuration information when the seventh condition is met, and how to release the SCG LTM candidate primary and secondary cell configuration information when the eighth condition is met.

[0356] When the seventh condition is met, the seventh condition is at least one of the following conditions:

[0357] 1. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

[0358] 2. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information, and the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

[0359] It should be noted that when the seventh condition includes only one of the above conditions, the specific meaning is as follows:

[0360] If the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information and the secondary cell group where the corresponding candidate primary and secondary cell is located is the same as the secondary cell group where the source primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is retained. If the first indication information includes the second release indication information and the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information does not exist in the second release indication information, and the secondary cell group where the corresponding candidate primary and secondary cell is located is the same as the secondary cell group where the source primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is retained.

[0361] It should also be understood that when the seventh condition includes any multiple of the above conditions, the target SCG LTM candidate primary and secondary cell configuration information is retained when it is determined that the multiple conditions are met.

[0362] When the eighth condition is met, the eighth condition is at least one of the following conditions:

[0363] 1. The first indication information includes the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0364] 2. The first indication information includes the second retention indication information, and the second retention indication information does not include the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously.

[0365] 3. The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located.

[0366] 4. The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the secondary cell group where the candidate primary and secondary cell is located is different from the secondary cell group where the source primary and secondary cell is located.

[0367] It should be noted that when the eighth condition includes only one of the above conditions, the specific meaning is as follows:

[0368] If the first indication information includes the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is released regardless of whether the secondary cell group where the candidate primary and secondary cell corresponding to the target SCG LTM candidate primary and secondary cell configuration information is located is the same as the secondary cell group where the source primary and secondary cell is located. If the first indication information includes the second retention indication information and the second retention indication information does not include the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, the target SCG LTM candidate primary and secondary cell configuration information is released regardless of whether the secondary cell group where the candidate primary and secondary cell corresponding to the target SCG LTM candidate primary and secondary cell configuration information is located is the same as the secondary cell group where the source primary and secondary cell is located. If the first indication information includes the second retention indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information and the secondary cell group where the corresponding candidate primary and secondary cell is located is different from the secondary cell group where the source primary and secondary cell is located, the target SCG LTM candidate primary and secondary cell configuration information is released. If the first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the target SCG LTM candidate primary and secondary cell configuration information, and the secondary cell group where the corresponding candidate primary and secondary cell is located is different from the secondary cell group where the source primary and secondary cell is located, then the target SCG LTM candidate primary and secondary cell configuration information is released.

[0369] It should also be understood that when the eighth condition includes any multiple items mentioned above, the target SCG LTM candidate primary and secondary cell configuration information is released when it is determined that the multiple items are met.

[0370] It should be understood that after the terminal device releases the SCG LTM candidate primary and secondary cell configuration information, the target primary cell network device needs to reconfigure the SCG LTM candidate primary and secondary cell configuration information when the LTM mechanism is subsequently switched. This requires the target primary cell network device to obtain relevant information about the released SCG LTM candidate primary and secondary cell configuration information. Therefore, the terminal device forms a third indication information based on the result of having released the SCG LTM candidate primary and secondary cell configuration information to indicate to the target primary cell network device that the terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

[0371] The third indication information may be a string of specific fields formed according to the result of releasing the SCG LTM candidate primary and secondary cell configuration information, or may be in other forms, which is not limited in this application. The third indication information may be sent to the primary cell network device through the terminal device as an independent signaling, or may be sent to the primary cell network device in other forms, which is not limited in this application.

[0372] In this method for processing candidate cell configuration information in this scenario, second retention or release indication information is configured for each SCG LTM candidate primary and secondary cell configuration information in the first indication information when a simultaneous primary cell change occurs, and the terminal device is instructed to make its own decision and the secondary cell group where each SCG LTM candidate primary and secondary cell configuration information is located. This allows the terminal device to independently determine the retention or release of the SCG LTM candidate primary and secondary cell configuration information in combination with the specific content indicated by the first indication information when a simultaneous primary cell change occurs, and can determine whether any of the above-mentioned seventh conditions or any of the above-mentioned eighth conditions are currently met based on the second retention or release indication information and the secondary cell group where each SCG LTM candidate primary and secondary cell configuration information is located, thereby retaining the SCG LTM candidate primary and secondary cell configuration information when it is determined that the seventh condition is met, and releasing the SCG LTM candidate primary and secondary cell configuration information when it is determined that the eighth condition is met. In this way, the terminal device can selectively and promptly retain the SCG LTM candidate primary and secondary cell configuration information when a simultaneous primary cell change occurs, meeting the subsequent LTM mechanism switching requirements, and can selectively and promptly release the SCG LTM candidate primary and secondary cell configuration information to reduce the terminal load.

[0373] In this scenario, the method for processing the candidate cell configuration information is that the terminal device transmits the release status of the candidate primary and secondary cell configuration information in the SCG LTM to the target primary cell network device by sending a third indication message to the target primary cell network device indicating that the terminal device has released the candidate primary and secondary cell configuration information in the SCG LTM, which is beneficial for the terminal device to timely configure the SCG LTM candidate primary and secondary cell configuration information when the LTM mechanism is subsequently triggered.

[0374] 3 to 6 , the following describes in detail the processing schemes for candidate cell configuration information when the device controlling the processing mode in the first scenario is a main cell network device and the device controlling the processing mode is a terminal device, and when the device controlling the processing mode in the second scenario is a main cell network device and the device controlling the processing mode is a terminal device, in the form of signaling interaction between devices.

[0375] Figure 3 shows, from the perspective of device interaction, the signaling interaction between the terminal device and each network device when only CPC occurs and the decision is made by the primary cell network device in an embodiment of the present application. In conjunction with Figure 3, the following describes the embodiment of the present application. Specifically, it may include S1301 to S1305 below.

[0376] S1301. The terminal device sends measurement results to the source primary cell network device.

[0377] Among them, the terminal device, the source main cell network device, and the source main and auxiliary cell network devices are in an RRC connection state.

[0378] S1302: The source primary cell network device obtains candidate primary and secondary cell configuration information and execution conditions from the candidate primary and secondary cell network devices.

[0379] The candidate primary and secondary cells include target primary and secondary cells and potential target primary and secondary cells. There may be one or more candidate primary and secondary cells.

[0380] S1303. The source primary cell network device sends RRC reconfiguration information to the terminal device. The RRC reconfiguration information is used to carry the candidate primary and secondary cell configuration information and execution conditions, and is applicable to the first indication information when only CPC occurs and the decision is made by the primary cell network device.

[0381] The first indication information applicable to when CPC only occurs and the decision is made by the primary cell network device includes at least one item of the following information: (1) first retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (2) first release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (3) first retention public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set. (4) first release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0382] It should be understood that the first indication information applicable to when only CPC occurs and the decision is made by the main cell network device can also be sent as an independent signaling. In order to make the accompanying drawings concise and clear, only the situation carried in the RRC reconfiguration information is illustrated, but this illustration is only an example and should not constitute any limitation to this application.

[0383] S1304. When the terminal device determines the target primary and secondary cells to be changed to, it initiates a random access process to the target primary and secondary cells.

[0384] It should be understood that when the terminal device determines the target primary and secondary cells to be changed to, the source primary and secondary cell network device may also send an LTM switching command to the terminal device.

[0385] S1305. The terminal device determines whether to retain or release the SCG LTM candidate primary and secondary cell configuration information according to the first indication information applicable when only CPC occurs and the decision is made by the primary cell network device.

[0386] It should be noted that the specific implementation scheme for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information in this embodiment is similar to the specific implementation scheme when the device controlling the processing method in the first scenario in the above embodiment is the primary cell network device, and will not be repeated here.

[0387] Figure 4 illustrates, from the perspective of device interaction, the signaling interaction between the terminal device and each network device when only CPC occurs and the terminal device makes the decision. The present embodiment will be described below with reference to Figure 4 , specifically including S1401 to S1406 below.

[0388] S1401. The terminal device sends measurement results to the source primary cell network device.

[0389] Among them, the terminal device, the source main cell network device, and the source main and auxiliary cell network devices are in an RRC connection state.

[0390] S1402: The source primary cell network device obtains candidate primary and secondary cell configuration information and execution conditions from the candidate primary and secondary cell network devices.

[0391] The candidate primary and secondary cells include target primary and secondary cells and potential target primary and secondary cells. There may be one or more candidate primary and secondary cells.

[0392] S1403. The source primary cell network device sends RRC reconfiguration information to the terminal device. The RRC reconfiguration information is used to carry the candidate primary and secondary cell configuration information and execution conditions, and is applicable to the first indication information when only CPC occurs and the decision is made by the terminal device.

[0393] The first indication information applicable only when CPC occurs and the decision is made by the terminal device includes the following information: (1) indication information for the terminal device to autonomously process the configuration information of the SCG LTM candidate primary and secondary cells, and (2) the secondary cell group to which each SCG LTM candidate primary and secondary cell belongs.

[0394] It should be understood that the first indication information applicable to when only CPC occurs and the decision is made by the terminal device can also be sent as an independent signaling. In order to make the accompanying drawings concise and clear, only the situation carried in the RRC reconfiguration information is illustrated, but this illustration is only an example and should not constitute any limitation to this application.

[0395] S1404. When the terminal device determines the target primary and secondary cells to be changed to, it initiates a random access process to the target primary and secondary cells.

[0396] It should be understood that when the terminal device determines the target primary and secondary cells to be changed to, the source primary and secondary cell network device may also send an LTM switching command to the terminal device.

[0397] S1405. The terminal device determines whether to retain or release the SCG LTM candidate primary and secondary cell configuration information based on the first indication information applicable when only CPC occurs and the decision is made by the terminal device.

[0398] S1406. When the SCG LTM candidate primary and secondary cell configuration information is released, the terminal device sends second indication information to the source primary cell network device. The second indication information is used to inform the source primary cell network device that the SCG LTM candidate primary and secondary cell configuration information has been released.

[0399] It should be noted that the specific implementation scheme for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information in this embodiment is similar to the specific implementation scheme when the device controlling the processing method in the first scenario in the above embodiment is a terminal device, and will not be repeated here.

[0400] Figure 5 illustrates, from the perspective of device interaction, the signaling interaction between a terminal device and various network devices when both the CPC and the primary cell change simultaneously, with the decision made by the primary cell network device, in an embodiment of the present application. In conjunction with Figure 5 , the present embodiment is described below. Specifically, it may include S1501 to S1505 below.

[0401] S1501. The terminal device sends measurement results to the source primary cell network device.

[0402] Among them, the terminal device, the source main cell network device, and the source main and auxiliary cell network devices are in an RRC connection state.

[0403] S1502: The source primary cell network device obtains corresponding configuration information and execution conditions from the candidate primary cell network devices and the candidate primary and secondary cell network devices.

[0404] The candidate primary and secondary cells include the target primary and secondary cells and potential target primary and secondary cells. There are one or more candidate primary and secondary cells. The candidate primary cells include the target primary cell and potential target primary cells. There are one or more candidate primary cells.

[0405] S1503. The source primary cell network device sends RRC reconfiguration information to the terminal device. The RRC reconfiguration information is used to carry the candidate primary and secondary cell configuration information and execution conditions, the candidate primary cell configuration information and execution conditions, and the first indication information applicable to when the CPC and the primary cell change at the same time and the decision is made by the primary cell network device.

[0406] Among them, the first indication information applicable to the case where the CPC and the primary cell change at the same time and the decision is made by the primary cell network device includes the following information: the second retention indication information or the second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes at the same time. And, at least one of the following information: (1) the first retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (2) the first release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information. (3) the first retention public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set. (4) the first release public indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set.

[0407] It should be understood that the first indication information applicable to when the CPC and the main cell change at the same time and the decision is made by the main cell network equipment can also be sent as an independent signaling. In order to make the accompanying drawings concise and clear, only the situation carried in the RRC reconfiguration information is illustrated, but this illustration is only an example and should not constitute any limitation to this application.

[0408] S1504. When the terminal device determines the target primary and secondary cells and the target primary cell to be changed to, it initiates a random access process to the target primary and secondary cells and the target primary cell.

[0409] It should be understood that when the terminal device determines the target primary and secondary cells and the target primary cell to be changed to, the source primary and secondary cell network devices and the source primary cell network devices may also send an LTM switching command to the terminal device.

[0410] S1505. The terminal device determines whether to retain or release the SCG LTM candidate primary and secondary cell configuration information based on the first indication information applicable when the CPC and the primary cell change simultaneously and the decision is made by the primary cell network device.

[0411] It should be noted that the specific implementation scheme for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information in this embodiment is similar to the specific implementation scheme when the device controlling the processing method in the second scenario in the above embodiment is the primary cell network device, and will not be repeated here.

[0412] Figure 6 illustrates, from the perspective of device interaction, the signaling interaction between a terminal device and various network devices when both the CPC and the primary cell change simultaneously and the decision is made by the terminal device in an embodiment of the present application. The present embodiment is described below with reference to Figure 6 . Specifically, it may include S1601 to S1606 below.

[0413] S1601. The terminal device sends measurement results to the source primary cell network device.

[0414] Among them, the terminal device, the source main cell network device, and the source main and auxiliary cell network devices are in an RRC connection state.

[0415] S1602: The source primary cell network device obtains corresponding configuration information and execution conditions from the candidate primary cell network devices and the candidate primary and secondary cell network devices.

[0416] The candidate primary and secondary cells include the target primary and secondary cells and potential target primary and secondary cells. There are one or more candidate primary and secondary cells. The candidate primary cells include the target primary cell and potential target primary cells. There are one or more candidate primary cells.

[0417] S1603. The source primary cell network device sends RRC reconfiguration information to the terminal device. The RRC reconfiguration information is used to carry the candidate primary and secondary cell configuration information and execution conditions, the candidate primary cell configuration information and execution conditions, and the first indication information applicable to when the CPC and the primary cell change at the same time and the decision is made by the terminal device.

[0418] The first indication information applicable to a case where a CPC and a primary cell change simultaneously occur and the decision is made by the terminal device includes the following information: second retention indication information or second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously. And, (1) indication information for autonomous processing of the SCG LTM candidate primary and secondary cell configuration information by the terminal device. (2) the secondary cell group to which each SCG LTM candidate primary and secondary cell belongs.

[0419] It should be understood that the first indication information applicable to when the CPC and the main cell change at the same time and the decision is made by the terminal device can also be sent as an independent signaling. In order to make the accompanying drawings concise and clear, only the situation carried in the RRC reconfiguration information is illustrated, but this illustration is only an example and should not constitute any limitation to this application.

[0420] S1604. When the terminal device determines the target primary and secondary cells and the target primary cell to be changed to, it initiates a random access process to the target primary and secondary cells and the target primary cell.

[0421] It should be understood that when the terminal device determines the target primary and secondary cells to be changed to, the source primary and secondary cell network device may also send an LTM switching command to the terminal device.

[0422] S1605. The terminal device determines whether to retain or release the SCG LTM candidate primary and secondary cell configuration information based on the first indication information applicable when the CPC and the primary cell change at the same time and the decision is made by the terminal device.

[0423] S1606. When the SCG LTM candidate primary and secondary cell configuration information is released, the terminal device sends third indication information to the target primary cell network device. The third indication information is used to inform the target primary cell network device that the SCG LTM candidate primary and secondary cell configuration information has been released.

[0424] It should be noted that the specific implementation scheme for retaining or releasing the SCG LTM candidate primary and secondary cell configuration information in this embodiment is similar to the specific implementation scheme when the device controlling the processing method in the second scenario in the above embodiment is a terminal device, and will not be repeated here.

[0425] The method provided by the embodiment of the present application is described in detail above with reference to Figures 2 to 6. The device provided by the embodiment of the present application is described in detail below with reference to Figure 7.

[0426] FIG7 is a schematic block diagram of a device 10 for processing candidate cell configuration information according to an embodiment of the present application. As shown in FIG7 , the device 10 for processing candidate cell configuration information may include a processing unit 11 and a transceiver unit 12.

[0427] In one possible design, the processing device 10 for the candidate 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 cell configuration information can be a terminal device, or a component configured in the terminal device, such as a chip or circuit.

[0428] The device 10 for processing candidate cell configuration information can implement the corresponding operations of the terminal device in the method embodiments shown in Figures 2 to 6. For example, the transceiver unit 12 can be used to execute step 210 in method 200, and the processing unit 11 can be used to execute step 220 in method 200. Furthermore, the various units in the device 10 for processing candidate cell configuration information and the other operations and / or functions described above are respectively used to implement the corresponding processes in the method embodiment shown in Figure 2.

[0429] Specifically, when the processing device 10 of the candidate cell configuration information is used to execute the method 200 in Figure 2, the transceiver unit 12 can be used to receive the first indication information sent by the primary cell network device, and the first indication information is used to indicate the processing strategy of the mobility SCG LTM candidate primary and secondary cell configuration information triggered by the secondary cell group layer 1 / 2 when the primary and secondary cells of the terminal device change CPC under certain conditions; the processing unit 11 can be used to retain or release the SCG LTM candidate primary and secondary cell configuration information according to the first indication information when determining the CPC target primary and secondary cell to be changed. The transceiver unit 12 can also be used to communicate with the primary cell network device. The primary cell network device is the network device to which the source primary cell belongs.

[0430] In another possible design, the processing device 10 for the candidate cell configuration information can implement the operations corresponding to the primary cell network device in the above method embodiment. For example, the processing device for the candidate cell configuration information can be the primary cell network device, or a component configured in the primary cell network device, such as a chip or circuit.

[0431] The candidate cell configuration information processing device 10 can implement the corresponding operations of the primary cell network device in the method embodiment shown in Figure 2. For example, the transceiver unit 12 can be used to perform step 210 in method 200. Furthermore, the various units in the candidate cell configuration information processing device 10 and the other operations and / or functions described above are respectively for implementing the corresponding processes in the method embodiment shown in Figure 2.

[0432] Specifically, when the processing device 10 of the candidate cell configuration information is used to execute the method 200 in Figure 2, the transceiver unit 12 can be used to send a first indication message to the terminal device, and the first indication message is used to indicate the processing strategy of the mobility SCG LTM candidate primary and secondary cell configuration information triggered by the secondary cell group layer 1 / 2 when the primary and secondary cells of the terminal device change CPC under certain conditions.

[0433] 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.

[0434] 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.

[0435] It should be understood that the device 10 for processing the candidate cell configuration information may correspond to the terminal device 110 or the 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 primary cell network device 120 may be an example of a primary cell network device. The processing unit 11 in the device 10 for processing the candidate cell configuration information may correspond to a processor in the terminal device 110 or the 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 primary cell network device 120 to implement the above functions, such as network coding, obtaining original packets, and the like; the transceiver unit 12 may correspond to an interface in the terminal device 110 or the 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.

[0436] Specifically, the transceiver unit 12 in the candidate cell configuration information processing device 10 can be implemented by a transceiver or a communication interface, for example, it can correspond to the transceiver 3020 in the terminal device 3000 shown in Figure 8 and the transceiver 4020 in the primary cell network device 4000 shown in Figure 9. The processing unit 11 in the candidate cell configuration information processing device 10 can be implemented by at least one processor, for example, it can correspond to the processor 3010 in the terminal device 3000 shown in Figure 8 and the processor 4060 in the primary cell network device 4000 shown in Figure 9.

[0437] 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.

[0438] FIG8 is a schematic diagram of a possible structure of a terminal device 3000 provided in an embodiment of the present application. The terminal device 3000 can be applied to the system shown in FIG1 to perform the functions of the terminal device in the above-mentioned method embodiment. As shown in FIG8 , the terminal device 3000 includes a processor 3010 and a transceiver 3020. Optionally, the terminal device 3000 also includes a memory 3030. The processor 3010, the transceiver 3020, and the memory 3030 can communicate with each other through an internal connection path to transmit control and / or data signals. The memory 3030 is used to store a computer program, and the processor 3010 is used to call and run the computer program from the memory 3030 to control the transceiver 3020 to transmit and receive signals. Optionally, the terminal device 3000 may also include an antenna 3040 for transmitting the uplink data or uplink control signaling output by the transceiver 3020 via a wireless signal.

[0439] The processor 3010 and the memory 3030 may be combined into a processing device, and the processor 3010 is configured to execute program codes stored in the memory 3030 to implement the aforementioned functions. In a specific implementation, the memory 3030 may also be integrated into the processor 3010 or independent of the processor 3010. The processor 3010 may correspond to the processing unit 11 in FIG. 7 .

[0440] The transceiver 3020 may correspond to the transceiver unit 12 in FIG7 . The transceiver 3020 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.

[0441] It should be understood that the terminal device 3000 shown in FIG8 is capable of implementing the various processes involved in the terminal device in the method embodiments shown in FIG2 through FIG6 . The operations and / or functions of the various modules in the terminal device 3000 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.

[0442] The processor 3010 can be used to execute the actions implemented within the terminal device described in the previous method embodiments, while the transceiver 3020 can be used to execute the actions of the terminal device sending to or receiving from the network device described in the previous method embodiments. For details, please refer to the description of the previous method embodiments and will not be repeated here.

[0443] Optionally, the terminal device 3000 may further include a power supply 3050 for providing power to various devices or circuits in the terminal device.

[0444] In addition, in order to make the functions of the terminal device more complete, the terminal device 3000 can also include one or more of an input unit 3060, a display unit 3070, an audio circuit 30100, a camera 3090 and a sensor 3100, and the audio circuit can also include a speaker 3110, a microphone 3120, etc.

[0445] Figure 9 is a possible structural diagram of a primary cell network device 4000 provided in an embodiment of the present application, for example, a structural diagram of a base station. The base station 4000 can be applied to the system shown in Figure 1 to perform the functions of the primary cell network device in the above method embodiment. As shown in Figure 9, the base station 4000 may include one or more radio frequency units, such as a remote radio unit (RRU) 4020 and one or more baseband units (BBU) (also referred to as distributed units (DU)) 4010. The RRU 4020 may be referred to as a transceiver unit, corresponding to the transceiver unit 12 in Figure 7. Optionally, the transceiver unit 4020 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 4030 and a radio frequency unit 4040. Optionally, the transceiver unit 4020 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 4020 is primarily responsible for receiving and transmitting RF signals and converting RF signals into baseband signals, for example, for sending first indication information to a terminal device. The BBU 4010 is primarily responsible for baseband processing and base station control. The RRU 4020 and BBU 4010 can be physically located together or separately, i.e., a distributed base station.

[0446] BBU 4010 is the control center of the base station, also known as a processing unit, which may correspond to processing unit 11 in FIG7 . It is primarily used to perform baseband processing functions such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU (processing unit) may 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.

[0447] In one example, the BBU 4010 can be composed of one or more single boards, and the 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 4010 also includes a memory 4050 and a processor 4060. The memory 4050 is used to store necessary instructions and data. The processor 4060 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 4050 and the processor 4060 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.

[0448] It should be understood that base station 4000 shown in FIG9 is capable of implementing the various processes involving the target network device in the method embodiment shown in FIG2 . The operations and / or functions of the various modules in base station 4000 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.

[0449] The BBU 4010 can be used to perform the actions implemented within the network device described in the previous method embodiments, while the RRU 4020 can be used to perform the actions described in the previous method embodiments in which the network device sends to or receives from the terminal device. For details, please refer to the description in the previous method embodiments and will not be repeated here.

[0450] It should be understood that the base station 4000 shown in Figure 9 is only one possible architecture of the 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 primary cell network device.

[0451] An embodiment of the present application further provides a processing device, including a processor and an interface; the processor is used to execute the method in any of the above method embodiments.

[0452] It should be understood that the processing device may be one or more chips. For example, the processing device 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.

[0453] 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.

[0454] 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.

[0455] 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.

[0456] 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 2 to 6.

[0457] 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 2 to 6.

[0458] 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 2 to 6.

[0459] 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.

[0460] 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).

[0461] 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.

[0462] 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.

[0463] 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.

[0464] 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.

[0465] 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.

[0466] 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)).

[0467] 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 several 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: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and other media that can store program codes.

[0468] 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 cell configuration information, characterized in that: include: Receive first indication information sent by the primary cell network device, where the first indication information is used to indicate a processing strategy for the mobility SCG LTM candidate primary and secondary cell configuration information triggered by the secondary cell group layer 1 / 2 when the primary and secondary cells of the terminal device change CPC under certain conditions; When determining the CPC target primary and secondary cells to be changed to, the SCG LTM candidate primary and secondary 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: First retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information; First release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information; First reserved common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set; The first release public indication information corresponding to the configuration information of at least one SCG LTM candidate primary and secondary cell represented in the form of a secondary cell set.

3. The method according to claim 2, characterized in that When the first condition is met, the SCG LTM candidate primary and secondary cell configuration information is retained, where the first condition includes at least one of the following conditions: The first indication information includes first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the first release indication information and does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes first reserved public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located; The first indication information includes the first release public indication information and does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

4. The method according to claim 2, characterized in that When the second condition is met, the SCG LTM candidate primary and secondary cell configuration information is released, where the second condition includes at least one of the following conditions: The first indication information includes first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the first retention indication information and does not include the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located; The first indication information includes the first reserved public indication information and does not include the first reserved public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

5. The method according to claim 2, characterized in that The first indication information further includes: second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a simultaneous primary cell change occurs; Alternatively, the second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information occurs when the primary cell is changed simultaneously.

6. The method according to claim 5, characterized in that The retaining or releasing the SCG LTM candidate primary and secondary cell configuration information according to the first indication information when determining the CPC target primary and secondary cell to be changed includes: When it is determined that the primary cell and the CPC primary and secondary cells are to be changed simultaneously, the SCG LTM candidate primary and secondary cell configuration information is retained or released according to the first indication information.

7. The method according to claim 6, characterized in that When the third condition is met, the SCG LTM candidate primary and secondary cell configuration information is retained, where the third condition is at least one of the following conditions: The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the second retention indication information corresponding to the configuration information of the SCG LTM candidate primary and secondary cells when the primary cell is changed simultaneously, and the first indication information includes the first retention common indication information of the secondary cell set in which the SCG LTM candidate primary and secondary cells are located; The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release indication information and does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information in the first release indication information; The first indication information includes the second retention indication information corresponding to the configuration information of the SCG LTM candidate primary and secondary cells when the primary cell is changed simultaneously, and the first indication information includes the first release public indication information and does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located. The first indication information includes the second release indication information, and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the second release indication information, and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first retention public indication information of the secondary cell set in which the SCG LTM candidate primary and secondary cell is located; The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release indication information and the first release indication information does not include the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information and the first release public indication information does not include the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cells are located.

8. The method according to claim 6, characterized in that When the fourth condition is met, the SCG LTM candidate primary and secondary cell configuration information is released, and the fourth condition is at least one of the following conditions: The first indication information includes second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously; The first indication information includes the second retention indication information, and the second retention indication information does not include the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously; The first indication information includes second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the second retention indication information corresponding to the configuration information of the SCG LTM candidate primary and secondary cells when the primary cell is changed simultaneously, and the first indication information includes the first release public indication information of the secondary cell set in which the SCG LTM candidate primary and secondary cells are located; The first indication information includes the second release indication information, and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously, and the first indication information includes the first release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information; The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the first indication information includes the first release public indication information of the secondary cell set where the SCG LTM candidate primary and secondary cell is located.

9. The method according to claim 1, characterized in that The first indication information includes: indication information for the terminal device to autonomously process the SCG LTM candidate primary and secondary cell configuration information; And the secondary cell group where each SCG LTM candidate primary and secondary cell is located.

10. The method according to claim 9, characterized in that When the fifth condition is met, the SCG LTM candidate primary and secondary cell configuration information is retained, and the fifth condition is: the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

11. The method according to claim 9, characterized in that When the sixth condition is met, the configuration information of the candidate primary and secondary cells in the SCG LTM is released, and the sixth condition is: the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located.

12. The method according to claim 11, characterized in that The method further comprises: Send second indication information to the primary cell network device, where the second indication information is used to indicate that the primary cell network device terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

13. The method according to claim 9, characterized in that The first indication information further includes: second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a simultaneous primary cell change occurs; Alternatively, the second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information occurs when the primary cell is changed simultaneously.

14. The method according to claim 13, characterized in that The retaining or releasing the SCG LTM candidate primary and secondary cell configuration information according to the first indication information when determining the CPC target primary and secondary cell to be changed includes: When it is determined that the primary cell and the CPC primary and secondary cells are to be changed simultaneously, the SCG LTM candidate primary and secondary cell configuration information is retained or released according to the first indication information.

15. The method according to claim 14, characterized in that When the seventh condition is met, the configuration information of the SCG LTM candidate primary and secondary cells is retained, and the seventh condition is at least one of the following conditions: The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when a simultaneous primary cell change occurs, and the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located; The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information, and the secondary cell group where the candidate primary and secondary cells are located is the same as the secondary cell group where the source primary and secondary cells are located.

16. The method according to claim 14, characterized in that When the eighth condition is met, the SCG LTM candidate primary and secondary cell configuration information is released, and the eighth condition is at least one of the following conditions: The first indication information includes second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously; The first indication information includes the second retention indication information, and the second retention indication information does not include the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell is changed simultaneously; The first indication information includes the second retention indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when a simultaneous primary cell change occurs and the secondary cell group where the candidate primary and secondary cells are located is different from the secondary cell group where the source primary and secondary cells are located; The first indication information includes the second release indication information and the second release indication information does not include the second release indication information corresponding to the SCG LTM candidate primary and secondary cell configuration information when the primary cell changes simultaneously, and the secondary cell group where the candidate primary and secondary cell is located is different from the secondary cell group where the source primary and secondary cell is located.

17. The method according to claim 16, characterized in that The method further comprises: Send third indication information to the target primary cell network device, where the third indication information is used to indicate that the target primary cell network device terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

18. The method according to any one of claims 1 to 17, characterized in that The first indication information is carried in radio resource control RRC reconfiguration information; Alternatively, the first indication information is carried in CPC configuration information, and the CPC configuration information is carried in radio resource control RRC reconfiguration information.

19. A method for processing candidate cell configuration information, characterized in that: include: A first indication message is sent to the terminal device, where the first indication message is used to indicate the terminal device's processing strategy for the SCG LTM candidate primary and secondary cell configuration information when a CPC primary and secondary cell change occurs.

20. The method according to claim 19, wherein The first indication information includes at least one of the following information: First retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information; First release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information; First reserved common indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information represented in the form of a secondary cell set; The first release public indication information corresponding to the configuration information of at least one SCG LTM candidate primary and secondary cell represented in the form of a secondary cell set.

21. The method according to claim 19, wherein The first indication information includes: indication information for the terminal device to autonomously process the SCG LTM candidate primary and secondary cell configuration information; And the secondary cell group where each SCG LTM candidate primary and secondary cell is located.

22. The method according to claim 21, characterized in that Also includes: Receive the second indication information sent by the terminal device, where the second indication information is used to indicate that the primary cell network device and the terminal device have released the SCG LTM candidate primary and secondary cell configuration information.

23. The method according to claim 20 or 21, characterized in that The first indication information further includes: second retention indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information when a simultaneous primary cell change occurs; Alternatively, the second release indication information corresponding to at least one SCG LTM candidate primary and secondary cell configuration information occurs when the primary cell is changed simultaneously.

24. The method according to claim 23, wherein If the first indication information includes indication information that the terminal device autonomously processes the SCG LTM candidate primary and secondary cell configuration information, the method further includes: Receive the third indication information sent by the terminal device, where the third indication information is used to indicate that the target primary cell network device terminal device has released the SCG LTM candidate primary and secondary cell configuration information.

25. The method according to any one of claims 19 to 22, characterized in that The first indication information is carried in radio resource control RRC reconfiguration information; Alternatively, the first indication information is carried in CPC configuration information, and the CPC configuration information is carried in radio resource control RRC reconfiguration information.

26. 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 18.

27. A 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 primary cell network device performs the method according to any one of claims 19 to 25.

28. 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 25 is implemented.

29. 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 used to run a computer program or instruction to execute the method according to any one of claims 1 to 25.

30. 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 25.

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