Communication method and apparatus, and computer readable storage medium

Abstract

The present application provides a communication method and apparatus, and a computer readable storage medium. The communication method comprises: reporting first information, wherein the first information comprises information related to conditional primary cell handover and / or conditional primary secondary cell addition / change in a dual-connectivity scenario. The present application provides a solution for assisting a terminal device to perform dual-connectivity conditional handover. A network device can analyze the problem of existing dual-connectivity conditional handover on the basis of the first information, and optimize the dual-connectivity conditional handover, so that the terminal device could then successfully complete dual-connectivity handover.

Description

Communication method and device, and computer-readable storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 19, 2023, with application number 202310892027.5 and invention name “Communication method and device, computer-readable storage medium”, 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 communication method and device, and a computer-readable storage medium. Background Art

[0003] In New Radio (NR) Release 18 (R18), to improve mobility performance, the introduction of dual-connectivity conditional handover (CHO) is being considered, along with Conditional PSCell Addition (CPA) and Conditional PSCell Change (CPC). CHO is a conditional handover for the primary cell (Pcell), while CPA / CPC is a conditional update for the primary secondary cell (PScell). Strictly speaking, a PSCell conditional update is different from a regular handover. This article also refers to the PSCell conditional update as a conditional handover for simplicity. A recent conclusion is that when the CPA / CPC execution conditions are met but the CHO execution conditions are not, the terminal device continues to evaluate the execution conditions for both CHO and CPA / CPC. For CHO+CPC (configuring candidate primary cells and candidate primary and secondary cells at the same time), execution is considered only when two conditions are met (when the CHO execution condition is met but the CPC execution condition is not met, if there is a conditional switching configuration with only the candidate primary cell configuration that meets the CHO condition or a CHO with a secondary cell group (SCG) configuration (the SCG contained in the conditional switching configuration has no corresponding switching condition (i.e., update condition)), the terminal device executes CHO or executes CHO with SCG, and the network side can handle this situation by providing appropriate configuration).

[0004] When the network side configures CHO and CPA / CPC for the terminal device, the terminal device must implement switching only when both the candidate PCell and candidate PSCell meet their respective switching execution conditions, and simultaneously access the PCell and PSCell that meet the conditions.

[0005] However, in actual network configuration, there may be unreasonable parameters, which may cause the terminal equipment to be unable to smoothly implement the switching between CHO and CPA / CPC.

[0006] Summary of the Invention

[0007] The present application provides a communication method and apparatus, and provides a solution for assisting terminal devices in performing dual connection condition switching, which enables network devices to analyze problems existing in existing dual connection condition switching based on first information, optimize the dual connection condition switching configuration, and enable a large number of terminal devices to successfully complete the dual connection condition switching thereafter.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] In a first aspect, a communication method is provided, the communication method including: reporting the first information, the first information including information related to primary cell condition switching and / or primary and secondary cell condition addition / update in a dual connectivity scenario.

[0010] Optionally, the first information includes one or more of the following: the first moment when the candidate primary cell meets the primary cell switching condition and the second moment when the candidate primary and secondary cell meet the primary and secondary cell switching condition, the time interval between the first moment and the second moment, the time interval between the third moment when the candidate primary cell and the candidate primary and secondary cell simultaneously meet the switching condition and the fourth moment when the conditional switching configuration of the candidate primary cell and the candidate primary and secondary cell is received, the time interval between the first moment and the fourth moment, and the time interval between the second moment and the fourth moment.

[0011] Optionally, the first information includes signal quality information of a cell corresponding to a primary cell switching condition and a primary / secondary cell switching condition when one of the other cell switching conditions is met.

[0012] Optionally, the first information includes signal quality information of the candidate primary and secondary cells when the candidate primary cell meets the primary cell switching condition; or, the first information includes signal quality information of the candidate primary and secondary cells when the candidate primary and secondary cells meet the primary and secondary cell switching condition.

[0013] Optionally, the signal quality information of the cell includes one or more of the following: the signal value of the cell, the difference between the signal value of the cell and the event entry condition included in the switching condition, the duration for the signal value of the cell to reach the event entry condition included in the switching condition, and the expected time for meeting the switching condition, the expected time represents the difference between the duration and the trigger duration included in the switching condition.

[0014] Optionally, the first information includes whether a primary cell switching condition is met and / or whether a primary and secondary cell switching condition is met in the event of a radio link failure or a handover failure.

[0015] Optionally, the first information includes the moment when one of the primary cell switching condition and the primary / secondary cell switching condition is met and the fifth moment when the radio link failure occurs, and / or the time interval between the moment when the condition is met and the fifth moment.

[0016] Optionally, the first information includes a failure cause in the event of a wireless link failure or a switching failure, the failure cause including a separate switching command for which the primary cell condition switching is not configured, and / or indication information, the indication information being used to indicate that only the primary and secondary cell switching conditions are met or only the primary cell switching conditions are met.

[0017] Optionally, the dual connectivity conditional switching configuration includes one or more groups of cells, each group of cells includes at least one candidate primary cell and at least one candidate primary and secondary cell; and reporting the first information includes: reporting first information for at least one group of cells.

[0018] Optionally, reporting the first information includes: sending high-layer signaling, where the high-layer signaling includes the first information.

[0019] In a second aspect, the present application further discloses a communication method, which includes: receiving first information, where the first information includes information related to primary cell condition switching and / or primary and secondary cell condition addition / update in a dual connectivity scenario.

[0020] Optionally, the first information includes one or more of the following: the first moment when the candidate primary cell meets the primary cell switching condition and the second moment when the candidate primary and secondary cell meet the primary and secondary cell switching condition, the time interval between the first moment and the second moment, the time interval between the third moment when the candidate primary cell and the candidate primary and secondary cell simultaneously meet the switching condition and the fourth moment when the conditional switching configuration of the candidate primary cell and the candidate primary and secondary cell is received, the time interval between the first moment and the fourth moment, and the time interval between the second moment and the fourth moment.

[0021] Optionally, the first information includes signal quality information of a cell corresponding to a primary cell switching condition and a primary / secondary cell switching condition when one of the other cell switching conditions is met.

[0022] Optionally, the first information includes whether a primary cell switching condition is met and / or whether a primary and secondary cell switching condition is met in the event of a radio link failure or a handover failure.

[0023] Optionally, the first information includes the cause of failure in the event of a wireless link failure or a switching failure, the cause of failure including a separate switching command for which the main cell condition switching is not configured, and / or second indication information, the second indication information being used to indicate that only the main and auxiliary cell switching conditions are met or only the main cell switching conditions are met.

[0024] In a third aspect, the present application also discloses a communication device, which includes: a communication module for reporting the first information, wherein the first information includes information related to the switching of the primary cell conditions and / or the addition / update of the primary and secondary cell conditions in a dual-connection scenario.

[0025] In a fourth aspect, the present application also discloses a communication device, which includes: a communication module for receiving first information, wherein the first information includes information related to the switching of primary cell conditions and / or the addition / update of primary and secondary cell conditions in a dual-connection scenario.

[0026] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored. The computer program is executed by a processor to execute any one of the methods provided in the first aspect or the second aspect.

[0027] In a sixth aspect, a communication device is provided, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor runs the computer program to execute any one of the methods provided in the first aspect.

[0028] In the seventh aspect, a communication device is provided, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the device is characterized in that the processor runs the computer program to execute any one of the methods provided in the second aspect.

[0029] In an eighth aspect, a computer program product is provided, on which a computer program is stored. The computer program is executed by a processor to perform any one of the methods provided in the first aspect or the second aspect.

[0030] In a ninth aspect, a communication system is provided, comprising the above-mentioned terminal device and the above-mentioned network device.

[0031] In the tenth aspect, an embodiment of the present application further provides a chip (or a data transmission device) on which a computer program is stored, and when the computer program is executed by the chip, the steps of the above method are implemented.

[0032] In the eleventh aspect, an embodiment of the present application also provides a system chip for use in a terminal, wherein the chip system includes at least one processor and an interface circuit, wherein the interface circuit and the at least one processor are interconnected through lines, and the at least one processor is used to execute instructions to execute any one of the methods provided in the first aspect or the second aspect.

[0033] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0034] In the technical solution of the present application, the terminal device reports first information to the network side, and the first information includes information related to the primary cell condition switching and / or the addition / update of the primary and secondary cell conditions in the dual connection scenario. The technical solution of the present application, by setting the terminal device to report the first information, assists the network side in timely learning the validity of the configuration parameters of the dual connection condition switching, analyzes the problems existing in the dual connection condition switching, and thus can adjust the parameter configuration in time, realize the reasonable configuration of the subsequent dual connection condition switching, and enable many terminal devices to successfully complete the dual connection condition switching and improve communication performance.

[0035] Furthermore, the first information includes one or more of the following: the first moment when the candidate primary cell meets the primary cell switching condition and the second moment when the candidate primary and secondary cells meet the primary and secondary cell switching condition, the time interval between the first moment and the second moment, the time interval between the third moment when the candidate primary cell and the candidate primary and secondary cells simultaneously meet the switching condition and the fourth moment when the candidate primary cell and candidate primary and secondary cell condition switching configuration is received, the time interval between the first moment and the fourth moment, and the time interval between the second moment and the fourth moment. By setting the above-mentioned first information, the technical solution of the present application can enable the network side to analyze whether the parameters such as the duration of the event entry condition included in the switching condition are reasonably configured based on the above-mentioned first information, which helps to configure more reasonable parameters on the network side, so that the terminal device can complete the dual-connection switching in time and improve the mobility performance.

[0036] Furthermore, the first information includes signal quality information of the other corresponding cell when one of the primary cell switching condition and the primary and secondary cell switching condition is met. By setting the above-mentioned first information, the technical solution of the present application can enable the network side to analyze whether the parameters such as the event entry condition included in the switching condition are reasonably configured based on the above-mentioned first information, which helps to configure more reasonable parameters on the network side, making it easier for the terminal device to complete the dual connection condition switching later, thereby improving mobility performance.

[0037] Furthermore, the first information includes whether the primary cell switching condition is met and / or whether the primary and secondary cell switching conditions are met in the event of a radio link failure or a handover failure. Since there are multiple reasons for the radio link failure or the handover failure, the technical solution of the present application records and reports the above-mentioned first information, so that the network device can promptly know the specific cause of the radio link failure or the handover failure, which helps the network device to make targeted adjustments in the subsequent dual-connectivity condition handover parameter configuration, so that the terminal device can successfully complete the dual-connectivity condition handover and improve communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is an interactive flow chart of a communication method provided in an embodiment of the present application;

[0039] FIG2 is an interactive flow chart of another communication method provided in an embodiment of the present application;

[0040] FIG3 is an interaction flow chart of another communication method provided in an embodiment of the present application;

[0041] FIG4 is an interaction flow chart of another communication method provided in an embodiment of the present application;

[0042] FIG5 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0043] FIG6 is a schematic diagram of the hardware structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The communication systems to which the embodiments of the present application are applicable include, but are not limited to, Long Term Evolution (LTE) systems, fifth-generation (5G) systems, new radio (NR) systems, and future evolution systems or multiple communication convergence systems. Among them, the 5G system can be a non-standalone (NSA) 5G system or a standalone (SA) 5G system. The technical solution of the present application is also applicable to different network architectures, including but not limited to relay network architecture, dual-connection architecture, vehicle-to-everything architecture and other architectures.

[0045] This application mainly relates to the communication between terminal devices and network devices. Among them:

[0046] The network device in the embodiment of the present application may also be referred to as an access network device, for example, a base station (BS) (also referred to as a base station device), which is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, in the second generation (2nd-Generation, 2G) network, the device providing the base station function includes a base transceiver station (Base Transceiver Station, BTS), in the third generation (3rd-Generation, 3G) network, the device providing the base station function includes a node B (NodeB), in the fourth generation (4th-Generation, 4G) network, the device providing the base station function includes an evolved node B (evolved NodeB, eNB), in the wireless local area network (Wireless Local Area Networks, WLAN), the device providing the base station function is an access point (Access Point, AP), and the device providing the base station function in NR is the next generation Node Base station (gNB), and the further evolved node B (ng-eNB), wherein the gNB and the terminal device communicate using NR technology, and the ng-eNB and the terminal device communicate using Evolved Universal Terrestrial Radio Access (E-UTRA) technology, and both gNB and ng-eNB can be connected to the 5G core network. The network device in the embodiment of the present application also includes a device that provides a base station function in a future new communication system, etc.

[0047] The terminal equipment in the embodiments of the present application may refer to various forms of access terminals, user units, user stations, mobile stations, mobile stations (MS), remote stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal equipment may also be 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 capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited thereto. The terminal equipment may also be referred to as User Equipment (UE), a terminal, etc.

[0048] As described in the background art, in actual network configuration, there may be unreasonable parameters, which may cause the terminal device to be unable to smoothly implement the switching between CHO and CPA / CPC.

[0049] The technical solution of the present application, by setting the terminal device to report the first information, assists the network side in timely learning the validity of the configuration parameters of the dual connection condition switching, analyzes the problems existing in the dual connection condition switching, and thus can adjust the parameter configuration in time, realize the reasonable configuration of the subsequent dual connection condition switching, and enable the terminal device to successfully complete the dual connection condition switching and improve the communication performance.

[0050] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0051] Referring to FIG1 , the method provided in this application specifically includes the following steps:

[0052] Step 101: The terminal device reports first information to the network device.

[0053] In this embodiment, the terminal device can configure dual connectivity and primary cell condition switching and / or primary and secondary cell condition addition / update, that is, the terminal device reports the first information when accessing the primary cell and the primary and secondary cells;

[0054] Alternatively, the first information includes information related to the main cell condition switching and / or the main and auxiliary cell condition addition / update in a dual-connection scenario, but the cell accessed when the terminal device reports the first information is not configured for dual connection, or the main cell condition switching and / or the main and auxiliary cell condition addition / update are not configured. In this embodiment, after receiving the first information, the network device will first determine the original service cell corresponding to the first information, and can analyze the first information to determine whether there are problems with the parameters of the dual-connection condition switching previously configured for the terminal device, such as whether the threshold in the main cell switching condition is set reasonably, whether the threshold in the main and auxiliary cell switching condition is set reasonably, whether the duration of the event entry condition included in the switching condition is appropriate, etc. If there is a problem, the network device can adjust the corresponding parameters for subsequent terminal device mobility parameter configuration to improve mobility performance.

[0055] It should be noted that the dual connectivity referred to herein refers to a terminal device being connected to two network devices or two wireless standards at the same time. Specifically, the terminal device is connected to a primary cell and a primary / secondary cell at the same time. For example, it can be various dual connectivity in protocol TS37.340, or it can be dual connectivity introduced in 6G and future evolution systems, and this application does not limit this.

[0056] It should be noted that the serial numbers of the steps in this embodiment do not limit the execution order of the steps.

[0057] It is understood that, in a specific implementation, the communication method can be implemented in the form of a software program, which runs in a processor integrated within a chip or chip module. The method can also be implemented in the form of software combined with hardware, which is not limited in this application.

[0058] In this embodiment, the terminal device accesses the primary cell (PCell), establishes a radio resource control (RRC) connection, and then establishes a data radio bearer (DRB) to start data transmission. Specifically, the terminal device may establish one or more DRBs.

[0059] The PCell can configure dual connectivity for the terminal device based on its service needs, such as NR dual connectivity (NR-DC). Subsequently, the network device, in order to meet mobility requirements and discover that the terminal device supports conditional switching, configures dual connectivity conditional switching for the terminal device, such as CHO and CPA / CPC. This means that the primary cell conditional switching configuration includes adding / updating primary and secondary cell conditions. The PCell can send a conditional switching request to the base station to which one or more candidate PCells belong, requesting the configuration of candidate PCells and candidate PSCells.

[0060] In a specific application scenario, the network side configures two sets of configurations for the terminal device:

[0061] 1. The candidate primary cell PCell1 and the corresponding primary cell switching conditions, as well as the candidate primary and secondary cell PSCell1 and the corresponding primary and secondary cell switching conditions;

[0062] 2. The candidate primary cell PCell2 and the corresponding primary cell switching condition, as well as the candidate primary secondary cell PSCell2 and the corresponding primary secondary cell switching condition.

[0063] In other words, the network device configures two groups of cells for the terminal device: the first group includes PCell1 and PSCell1, and the second group includes PCell2 and PSCell2. The network device (e.g., PCell) sends the configured dual connectivity condition handover configuration to the terminal device, and the terminal device begins evaluating candidate PCells and candidate PSCells. Handover conditions are also called handover execution conditions. This document also refers to the primary and secondary cell addition / update conditions as primary and secondary cell handover conditions for uniformity and simplicity.

[0064] In a specific implementation, the terminal device may record the first information during the process of evaluating the candidate PCell and the candidate PSCell, and report the first information to the network device via high-layer signaling.

[0065] Depending on the actual evaluation results, there are multiple scenarios: successful dual-connectivity handover, failed dual-connectivity handover, and radio link failure. Failure of dual-connectivity handover indicates that the terminal device was unable to successfully access the target cell during the handover process, and radio link failure indicates a problem with the link between the terminal device and the source serving cell. This is explained below with reference to the specific first information.

[0066] Example 1, scenario where dual-connectivity conditional switching is successful: the first information includes one or more of the following: the first moment when the candidate primary cell meets the primary cell switching condition and the second moment when the candidate primary and secondary cells meet the primary and secondary cell switching condition, the time interval between the first moment and the second moment, the time interval between the third moment when the candidate primary cell and the candidate primary and secondary cells simultaneously meet the switching condition and the fourth moment when the candidate primary cell and candidate primary and secondary cell conditional switching configuration is received, the time interval between the first moment and the fourth moment, and the time interval between the second moment and the fourth moment.

[0067] In the embodiment of the present invention, the terminal device receives the candidate primary cell and the candidate primary and secondary cell conditional switching configuration from the network device at time T4 (ie, the fourth time).

[0068] Referring to FIG. 2 , in step 201 , the terminal device prepares to access the target network device.

[0069] Specifically, during the evaluation process, the terminal device finds that PCell 1 meets the handover execution condition at time T1 (i.e., the first time), and PSCell 1 meets the update execution condition at time T2 (i.e., the second time) (PCell 1 still continues to meet the handover execution condition at this time). Time T1 is earlier than time T2. The terminal device then accesses PCell 1 and PSCell 1 at or after time T2.

[0070] Alternatively, during the evaluation process, the terminal device finds that PCell1 and PSCell1 both meet the update execution condition at time T3 (ie, the third time). Then, the terminal device accesses PCell1 and PSCell1 at or after time T3.

[0071] In step 202, the terminal device reports first information to the network device.

[0072] When the terminal device finds that both the candidate PCell and candidate PSCell meet the corresponding handover conditions, it accesses the candidate PCell and candidate PSCell, which then become the target PCell and target PSCell of the terminal device. During the access process, the terminal device records the first information; alternatively, the terminal device may first record the first information and then access the target PCell and target PSCell.

[0073] After the terminal device accesses the target PCell and the target PSCell, the terminal device may report the first information.

[0074] For example, the terminal device records time T1 and time T2 and reports time T1 and time T2 to the network device. The network device can learn the difference between time T1 and time T2 and optimize the relevant parameters of the subsequent dual connectivity condition switching based on the difference.

[0075] For another example, the terminal device records time T1 and time T2, calculates the time interval between time T1 and time T2, and reports the time interval to the network device.

[0076] For another example, the terminal device records time T1 and time T2, calculates the time interval between time T1 and time T4, and the time interval between time T2 and time T4, and reports the time intervals to the network device.

[0077] For another example, the terminal device records time T3, calculates the time interval between time T3 and time T4, and reports the time interval to the network device.

[0078] In step 202, since the dual-connectivity condition of the terminal device is switched successfully, the terminal device can report the first information to the target network device after the switch via high-layer signaling.

[0079] Example 2, scenario where dual connectivity condition switching fails: the first information includes one or more of the following: when one of the primary cell switching condition and the primary and secondary cell switching condition is met, the signal quality information of the other corresponding cell; whether the primary cell switching condition is met; whether the primary and secondary cell switching conditions are met; and the reason for failure.

[0080] In step 301, the terminal device reports first information.

[0081] In the embodiment of the present invention, the failure of dual connectivity condition switching can be specifically divided into three situations.

[0082] Case 1: The candidate primary cell meets the corresponding primary cell switching condition, and the candidate primary and secondary cells do not meet the corresponding primary and secondary cell switching condition.

[0083] In this case, the terminal device records the signal quality information of the candidate primary and secondary cells. In step 302, the terminal device reports the signal quality information of the candidate primary and secondary cells to the network device.

[0084] For example, the candidate primary cell PCell1 meets the corresponding primary cell switching condition at time T1, and the candidate primary secondary cell PSCell1 does not meet the corresponding primary secondary cell switching condition. The terminal device records the signal quality information of PSCell1 at time T1.

[0085] The signal quality information may specifically include one or more of the following: the signal value of the cell, the difference between the signal value of the cell and the event entry condition included in the switching condition, the duration for the signal value of the cell to reach the event entry condition included in the switching condition, and the expected time to meet the switching condition, where the expected time represents the difference between the duration and the trigger duration included in the switching condition.

[0086] For example, the primary / secondary cell switching condition for PSCell1 configured by the network is that the signal quality of candidate PSCell1 is 2dB higher than that of the serving PSCell and needs to last for 80 milliseconds (i.e., TimeToTrigger is 80ms); at time T1, PSCell1 is 2dB higher than the serving PSCell and lasts for 20ms. Then, the terminal device can record the following first information: the signal value of PSCell1, the difference of 2dB, the duration of 20ms, and the expected time of 60ms.

[0087] Accordingly, the terminal device may also record the first information for the second group of cells (PCell2 and PSCell2). That is, when PCell2 meets the corresponding primary cell switching conditions, the terminal device records one or more of the signal value, difference, duration, and expected time of PSCell2 at time T1.

[0088] Furthermore, when reporting the first information, the terminal device may report the signal quality information of PSCell 1 and the signal quality information of PSCell 2 separately. The terminal device may also report the signal quality information of PSCell 1 and the signal quality information of PSCell 2 together.

[0089] Furthermore, the terminal device may also record whether the primary cell switching condition is met and / or whether the primary and secondary cell switching conditions are met. For example, the terminal device may record the following first information: PCell1 meets the corresponding primary cell switching condition, PSCell1 does not meet the corresponding primary and secondary cell switching condition, the signal value of PSCell1, the difference is 2dB, the duration is 20ms, and the expected time is 60ms.

[0090] Case 2: The candidate primary cell does not meet the corresponding primary cell switching condition, and the candidate primary and secondary cells meet the corresponding primary and secondary cell switching conditions.

[0091] In this case, the terminal device records the signal quality information of the candidate primary cell. In step 302, the terminal device reports the signal quality information of the candidate primary cell to the network device.

[0092] For example, the candidate primary and secondary cell PSCell1 meets the corresponding primary and secondary cell switching condition (ie, the primary and secondary cell adding / updating condition) at time T2, and the terminal device records the signal quality information of PCell1 at time T2.

[0093] For example, the primary cell switching condition for PCell 1 is that the signal quality of candidate PCell 1 is 2dB higher than that of the serving PCell and lasts for 80 milliseconds. At time T2, PCell 1 is 2dB higher than that of the serving PCell and lasts for 20ms. The terminal device can then record the following first information: PCell 1 signal value, 2dB difference, 20ms duration, and 60ms expected time.

[0094] Accordingly, the terminal device may also record the first information for the second group of cells (PCell2 and PSCell2). For example, if PSCell2 meets the corresponding primary and secondary cell switching conditions, the terminal device records one or more of the signal value, difference, duration, and expected time of PCell2 at time T2.

[0095] Furthermore, the terminal device may report the signal quality information of PCell 1 and the signal quality information of PCell 2 separately. The terminal device may also report the signal quality information of PCell 1 and the signal quality information of PCell 2 together.

[0096] Furthermore, the terminal device may also record whether the primary cell switching condition is met and / or whether the primary and secondary cell switching conditions are met. For example, the terminal device may record the following first information: PSCell1 meets the corresponding primary cell switching condition, PCell1 does not meet the corresponding primary and secondary cell switching condition, the signal value of PCell1, the difference is 2dB, the duration is 20ms, and the expected time is 60ms.

[0097] Case 3: The candidate primary cell does not meet the corresponding primary cell switching condition, and the candidate primary and secondary cells do not meet the corresponding primary and secondary cell switching conditions.

[0098] In this case, the terminal device may record that the primary cell switching condition is not met and / or the primary and secondary cell switching condition is not met. For example, the terminal device may record the following first information: PCell1 does not meet the corresponding primary cell switching condition, and PSCell1 does not meet the corresponding primary and secondary cell switching condition.

[0099] Furthermore, in Example 2, the first information may also include the reason for failure in the event of a switching failure, the reason for failure including a separate switching command for not configuring the main cell condition switching (that is, the main cell condition switching configuration does not include PSCell), and / or indication information, the indication information is used to indicate that only the main and auxiliary cell switching conditions are met or only the main cell switching conditions are met.

[0100] For example, PCell1 meets the corresponding primary cell handover conditions at time T1, while PSCell1 does not meet the corresponding primary and secondary cell handover conditions. However, the network does not configure a separate handover command for CHO (i.e., the primary cell conditional handover configuration does not include CPC / CPA). If a handover failure occurs, the terminal device records the failure reason as not configuring a separate handover command for primary cell conditional handover, or only meeting the primary cell handover conditions.

[0101] For example, if PSCell1 meets the corresponding primary / secondary cell switching condition at time T2, but candidate primary cell PCell1 does not meet the corresponding primary cell switching condition, then when a handover failure occurs, the terminal device records the failure reason as only meeting the primary / secondary cell switching condition.

[0102] Since the terminal device fails to switch the dual connection conditions, the terminal device may trigger RRC reconstruction to re-establish communication with the network, so the terminal device can report the first information to the network device through high-level signaling; the terminal device may also temporarily interrupt communication with the network and enter an idle state. The terminal device continues to save the recorded first information, and then reports the first information to the network device through high-level signaling when re-accessing the network.

[0103] Example 3, scenario of wireless link failure: the first information includes one or more of the following: whether the main cell switching condition is met, whether the main and auxiliary cell switching conditions are met, the signal quality of the candidate main cell, the signal quality of the candidate main and auxiliary cells, and when one of the main cell switching condition and the main and auxiliary cell switching condition is met, the time interval between the moment of satisfaction and the fifth moment when the wireless link failure occurs.

[0104] In this embodiment, the terminal device continuously evaluates candidate cells, but within a period of time, it fails to meet the corresponding switching conditions for both the candidate PCell and the candidate PSCell, resulting in the terminal device continuing to maintain a connection with the source service cell, but in some cases (for example, the terminal device moves to the edge of the cell), the terminal device encounters a wireless link failure on the source service cell side.

[0105] The terminal device may record the first information at or after the fifth moment when the wireless link failure occurs.

[0106] In step 401, the terminal device establishes an RRC connection with the network device. The terminal device may perform an RRC reestablishment to restore the connection with the network device; or if the terminal device enters an idle state after a radio link failure, the terminal device may initiate an RRC connection establishment process again to establish an RRC connection with the network device.

[0107] In step 402, the terminal device reports the first information to the network device. That is, the terminal device reports the first information after the RRC reestablishment is successful.

[0108] For example, if the candidate primary cell PCell1 meets the corresponding primary cell switching condition at time T1, but the candidate primary secondary cell PSCell1 does not meet the corresponding primary secondary cell switching condition, the terminal device experiences a radio link failure at time T5. The terminal device records time T1 and time T5 and reports them to the network device.

[0109] For another example, the terminal device records time T1 and time T5, calculates the time interval between time T1 and time T5, and reports the time interval to the network device.

[0110] In a non-limiting embodiment, the number of time intervals between the satisfying moment and the fifth moment may be multiple. In this case, the terminal device reports multiple time intervals to the network device.

[0111] For example, PCell1 meets the corresponding primary cell switching conditions at time T1, while PSCell1 does not meet the corresponding primary and secondary cell switching conditions at time T1; after a period of time, PCell1 does not meet the corresponding primary cell switching conditions at time T6, while PSCell1 meets the corresponding primary and secondary cell switching conditions at time T6; after another period of time, PCell1 meets the corresponding primary cell switching conditions at time T7, while PSCell1 does not meet the corresponding primary and secondary cell switching conditions at time T7. The terminal device can then calculate the time intervals between time T1 and time T5, the time interval between time T6 and time T5, and the time interval between time T7 and time T5, and report the above three time intervals to the network device.

[0112] Furthermore, in embodiment 3, the first information may also include the cause of failure in the event of a wireless link failure, the cause of failure including a separate switching command for not configuring the main cell condition switching, and / or indication information, the indication information is used to indicate that only the main and auxiliary cell switching conditions are met or only the main cell switching conditions are met.

[0113] For example, PCell1 meets the corresponding primary cell switching conditions at time T1, while PSCell1 does not meet the corresponding primary and secondary cell switching conditions. However, the network does not configure a separate switching command for CHO (i.e., the primary cell conditional switching configuration does not include CPC / CPA). If a radio link failure occurs on the source side, the terminal device records the failure cause as not configuring a separate switching command for primary cell conditional switching, or only meeting the primary cell switching conditions.

[0114] For example, PSCell1 meets the corresponding primary and secondary cell switching conditions at time T2, while candidate primary cell PCell1 does not meet the corresponding primary cell switching conditions. Then, when a radio link failure occurs on the source side, the terminal device records the failure cause as only meeting the primary and secondary cell switching conditions.

[0115] Furthermore, in embodiment 3, the first information may also include whether the candidate primary cell meets the switching condition and whether the candidate primary and secondary cells meet the switching condition at the time when the radio link failure occurs. The terminal device may also record the signal quality of the candidate primary cell and the candidate primary and secondary cells at this time respectively, and if the candidate primary cell meets the entry condition of the event corresponding to the switching condition, record the duration of meeting the entry condition, or record the expected time of meeting the switching condition.

[0116] For more specific implementation methods of the embodiments of the present application, please refer to the aforementioned embodiments, which will not be repeated here.

[0117] Please refer to FIG5 , which shows a communication device 50. The communication device 50 may include:

[0118] The communication module 501 is configured to report the first information.

[0119] In a specific implementation, the above-mentioned communication device 50 can correspond to a chip with communication function in the terminal equipment, such as a system-on-a-chip (SOC), a baseband chip, etc.; or correspond to a chip module with communication function in the terminal equipment; or correspond to a chip module with a data processing function chip, or correspond to the terminal equipment.

[0120] In another embodiment, the communication module 501 may be configured to receive first information.

[0121] In a specific implementation, the above-mentioned communication device 50 can correspond to a chip with communication function in a network device, such as an SOC, a baseband chip, etc.; or correspond to a chip module with communication function in a network device; or correspond to a chip module with a data processing function chip, or correspond to a network device.

[0122] For other related descriptions about the communication device 50 , reference may be made to the related descriptions in the aforementioned embodiments, which will not be repeated here.

[0123] Regarding the various modules / units contained in the various devices and products described in the above embodiments, they can be software modules / units, hardware modules / units, or partly software modules / units and partly hardware modules / units. For example, for various devices and products applied to or integrated into a chip, the various modules / units contained therein can all be implemented in the form of hardware such as circuits, or at least part of the modules / units can be implemented in the form of software programs, which run on the processor integrated inside the chip, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated into a chip module, the various modules / units contained therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component of the chip module (such as a chip, circuit module, etc.) or in different components, or at least part of the modules / units can be implemented in the form of software programs. It is implemented in the form of a software program, which runs on the processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in the terminal equipment, the various modules / units contained therein can be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or different components in the terminal equipment, or, at least some modules / units can be implemented in the form of a software program, which runs on the processor integrated inside the terminal equipment, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits.

[0124] The present application also discloses a storage medium, which is a computer-readable storage medium having a computer program stored thereon. When the computer program is run, the steps of the method shown in the aforementioned embodiment can be executed. The storage medium may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. The storage medium may also include a non-volatile memory or a non-transitory memory, etc.

[0125] 6 , an embodiment of the present application further provides a hardware structure diagram of a communication device, wherein the device includes a processor 601 , a memory 602 , and a transceiver 603 .

[0126] Processor 601 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. Processor 601 may also include multiple CPUs, and processor 601 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

[0127] The memory 602 may be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, and the embodiments of the present application do not impose any restrictions on this. The memory 602 can be independent (in this case, the memory 602 can be located outside the device or inside the device), or it can be integrated with the processor 601. Among them, the memory 602 can contain computer program code. The processor 601 is used to execute the computer program code stored in the memory 602, thereby implementing the method provided in the embodiments of the present application.

[0128] The processor 601, memory 602, and transceiver 603 are connected via a bus. The transceiver 603 is used to communicate with other devices or a communication network. Optionally, the transceiver 603 may include a transmitter and a receiver. The device used to implement the receiving function in the transceiver 603 can be considered a receiver, which is used to perform the receiving steps in the embodiments of the present application. The device used to implement the transmitting function in the transceiver 603 can be considered a transmitter, which is used to perform the transmitting steps in the embodiments of the present application.

[0129] When the structural diagram shown in Figure 6 is used to illustrate the structure of the terminal device involved in the above embodiment, the processor 601 is used to control and manage the actions of the terminal device. For example, the processor 601 is used to support the terminal device to execute step 101 in Figure 1, or steps 201 and 202 in Figure 2, or step 301 in Figure 3, or steps 401 and 402 in Figure 4, and / or the actions performed by the terminal device in other processes described in the embodiments of the present application. The processor 601 can communicate with other network entities through the transceiver 603, for example, communicating with the above-mentioned network device. The memory 602 is used to store program code and data of the terminal device. When the processor runs the computer program, it can control the transceiver 603 to send / receive RRC signaling.

[0130] When the structural diagram shown in FIG6 is used to illustrate the structure of the network device involved in the above embodiment, the processor 601 is used to control and manage the actions of the network device. For example, the processor 601 is used to support the network device to execute step 101 in FIG1, or steps 201 and 202 in FIG2, or step 301 in FIG3, or steps 401 and 402 in FIG4, and / or the actions performed by the network device in other processes described in the embodiments of the present application. The processor 601 can communicate with other network entities through the transceiver 603, for example, with the above-mentioned terminal device. The memory 602 is used to store program code and data of the network device. When the processor runs the computer program, it can control the transceiver 603 to send / receive RRC signaling.

[0131] The embodiment of the present application defines the unidirectional communication link from the access network to the terminal device as a downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; and the unidirectional communication link from the terminal device to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

[0132] It should be understood that the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document indicates that the related objects are in an "or" relationship.

[0133] The term "plurality" used in the embodiments of the present application refers to two or more.

[0134] The first, second, etc. descriptions appearing in the embodiments of this application are only for illustration and distinction of the description objects. There is no order, nor does it indicate any special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application.

[0135] The "connection" appearing in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitations on this.

[0136] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments 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 or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in 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 by wired or wireless means.

[0137] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed methods, devices, and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic; for example, the division of the units is merely a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical, or other forms.

[0139] The units described as separate components may or may not be physically separate, and the 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.

[0140] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may be physically included separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0141] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to perform some steps of the method described in each embodiment of the present application.

[0142] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims.

Claims

1. A communication method, characterized in that: include: Reporting first information, where the first information includes information related to primary cell condition switching and / or primary and secondary cell condition addition / update in a dual connectivity scenario.

2. The communication method according to claim 1, characterized in that: The first information includes one or more of the following: the first moment when the candidate primary cell satisfies the primary cell switching condition and the second moment when the candidate primary and secondary cell satisfies the primary and secondary cell switching condition, the time interval between the first moment and the second moment, the time interval between the third moment when the candidate primary cell and the candidate primary and secondary cell simultaneously satisfy the switching condition and the fourth moment when the conditional switching configuration of the candidate primary cell and the candidate primary and secondary cell is received, the time interval between the first moment and the fourth moment, and the time interval between the second moment and the fourth moment.

3. The communication method according to claim 1, characterized in that: The first information includes signal quality information of a cell corresponding to the other cell when one of the primary cell switching condition and the primary and secondary cell switching condition is met.

4. The communication method according to claim 3, characterized in that: The first information includes signal quality information of the candidate primary and secondary cells when the candidate primary cell meets the primary cell switching condition; or, the first information includes signal quality information of the candidate primary and secondary cells when the candidate primary and secondary cells meet the primary and secondary cell switching condition.

5. The communication method according to claim 3, characterized in that: The signal quality information of the cell includes one or more of the following: the signal value of the cell, the difference between the signal value of the cell and the event entry condition included in the switching condition, the duration for the signal value of the cell to reach the event entry condition included in the switching condition, and the expected time for satisfying the switching condition, wherein the expected time represents the difference between the duration and the trigger duration included in the switching condition.

6. The communication method according to claim 1, characterized in that: The first information includes whether a primary cell switching condition is satisfied and / or whether a primary and secondary cell switching condition is satisfied in the event of a radio link failure or a handover failure.

7. The communication method according to claim 6, characterized in that: The first information includes, when one of the primary cell switching condition and the primary and secondary cell switching condition is met, a satisfying moment and a fifth moment at which a radio link failure occurs, and / or a time interval between the satisfying moment and the fifth moment.

8. The communication method according to claim 1, characterized in that: The first information includes the cause of failure in the event of a wireless link failure or a switching failure, wherein the cause of failure includes a separate switching command for which the primary cell conditional switching is not configured, and / or indication information, wherein the indication information is used to indicate that only the primary and secondary cell switching conditions are met or only the primary cell switching conditions are met.

9. The communication method according to claim 1, characterized in that: The dual connectivity conditional handover configuration includes one or more groups of cells, each group of cells includes at least one candidate primary cell and at least one candidate primary secondary cell; The reporting of the first information includes: Reporting first information for at least one group of cells.

10. The communication method according to any one of claims 1 to 9, characterized in that: The reporting of the first information includes: A high-layer signaling is sent, where the high-layer signaling includes the first information.

11. A communication method, characterized in that: include: First information is received, where the first information includes information related to primary cell condition switching and / or primary and secondary cell condition addition / update in a dual connectivity scenario.

12. The communication method according to claim 11, characterized in that: The first information includes one or more of the following: the first moment when the candidate primary cell satisfies the primary cell switching condition and the second moment when the candidate primary and secondary cell satisfies the primary and secondary cell switching condition, the time interval between the first moment and the second moment, the time interval between the third moment when the candidate primary cell and the candidate primary and secondary cell simultaneously satisfy the switching condition and the fourth moment when the conditional switching configuration of the candidate primary cell and the candidate primary and secondary cell is received, the time interval between the first moment and the fourth moment, and the time interval between the second moment and the fourth moment.

13. The communication method according to claim 11, characterized in that: The first information includes signal quality information of a cell corresponding to the other cell when one of the primary cell switching condition and the primary and secondary cell switching condition is met.

14. The communication method according to claim 11, characterized in that: The first information includes whether a primary cell switching condition is satisfied and / or whether a primary and secondary cell switching condition is satisfied in the event of a radio link failure or a handover failure.

15. The communication method according to claim 11, characterized in that: The first information includes the cause of failure in the event of a wireless link failure or a switching failure, wherein the cause of failure includes a separate switching command for not configuring the primary cell condition switching, and / or second indication information, wherein the second indication information is used to indicate that only the primary and secondary cell switching conditions are met or only the primary cell switching conditions are met.

16. A communication device, characterized in that: include: The communication module is used to report first information, where the first information includes information related to primary cell condition switching and / or primary and secondary cell condition addition / update in a dual connectivity scenario.

17. A communication device, characterized in that: include: The communication module is used to receive first information, where the first information includes information related to primary cell condition switching and / or primary and secondary cell condition addition / update in a dual connectivity scenario.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the communication method according to any one of claims 1 to 15 are executed.

19. A communication device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the processor performs the steps of the communication method according to any one of claims 1 to 10.

20. A communication device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the processor performs the steps of the communication method according to any one of claims 11 to 15.

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