Conditional handover method, terminal and network side device

Abstract

The embodiment of the application discloses a conditional switching method, a terminal and a network side device, and belongs to the technical field of communication. The conditional switching method comprises the following steps: a terminal evaluates an MCG execution condition and at least one of the following conditions: an SCG execution condition, and a CPAC execution condition; and the terminal performs conditional switching according to an evaluation result.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a conditional handover method, a terminal and a network side device. BACKGROUND

[0002] In the conditional handover process, the terminal can evaluate the execution condition of the master cell group (MCG) to select a master cell (PCell) that meets the condition, but cannot guarantee the signal condition of the secondary cell group (SCG), which may cause the SCG handover to fail in the handover process, or cause the SCG connection existing before the handover to be interrupted after the handover, thereby affecting the communication performance of the terminal. SUMMARY

[0003] The embodiments of the present application provide a conditional handover method, a terminal and a network side device, which can solve the problem of affecting the communication performance of the terminal due to the SCG handover failure or SCG connection interruption in the conditional handover process.

[0004] In a first aspect, a conditional handover method is provided, comprising: a terminal evaluating a MCG execution condition and at least one of the following: an SCG execution condition, a CPAC execution condition; and the terminal performing conditional handover according to the evaluation result.

[0005] In a second aspect, a conditional handover method is provided, comprising: a network side device sending a conditional handover message to a terminal, wherein the conditional handover message comprises at least one target execution condition, and the target execution condition comprises at least one of the following: an SCG execution condition; a time length of a first timer, wherein the first timer is used to control the time length of the SCG execution condition evaluation; and an SCG evaluation indication, wherein the SCG evaluation indication is used to indicate whether to evaluate the SCG execution condition.

[0006] In a third aspect, a conditional handover device is provided, comprising: a processing module, configured to evaluate a MCG execution condition and at least one of the following: an SCG execution condition, a CPAC execution condition; and a handover module, configured to perform conditional handover according to the evaluation result.

[0007] In a fourth aspect, a conditional handover device is provided, comprising: a sending module, configured to send a conditional handover message to a terminal, wherein the conditional handover message comprises at least one target execution condition, and the target execution condition comprises at least one of the following: an SCG execution condition; a time length of a first timer, wherein the first timer is used to control the time length of the SCG execution condition evaluation; and an SCG evaluation indication, wherein the SCG evaluation indication is used to indicate whether to evaluate the SCG execution condition.

[0008] In a fifth aspect, a terminal is provided, comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implement steps of the method according to the first aspect.

[0009] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is configured to evaluate an MCG execution condition and at least one of the following: an SCG execution condition, a CPAC execution condition; perform a conditional handover according to an evaluation result.

[0010] In a seventh aspect, a network-side device is provided, comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implement steps of the method according to the second aspect.

[0011] In an eighth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the communication interface is configured to send a conditional handover message to a terminal, the conditional handover message comprising at least one target execution condition, the target execution condition comprising at least one of the following: an SCG execution condition; a time length of a first timer, the first timer being configured to control a time length of SCG execution condition evaluation; an SCG evaluation indication, the SCG evaluation indication being configured to indicate whether to evaluate the SCG execution condition.

[0012] In a ninth aspect, a conditional handover system is provided, comprising: a terminal configured to implement steps of the method according to the first aspect, and a network-side device configured to implement steps of the method according to the second aspect.

[0013] In a tenth aspect, a readable storage medium is provided, the readable storage medium storing programs or instructions, the programs or instructions, when executed by a processor, implement steps of the method according to the first aspect or the second aspect.

[0014] In an eleventh aspect, a chip is provided, comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being configured to run programs or instructions, implement steps of the method according to the first aspect or the second aspect.

[0015] In a twelfth aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the computer program / program product being executed by at least one processor to implement steps of the method according to the first aspect or the second aspect.

[0016] In the embodiments of the present application, the terminal can evaluate at least one of the SCG execution condition and the CPAC execution condition in addition to the MCG execution condition when performing conditional switching, and perform conditional switching according to the evaluation result, which is conducive to improving the success rate of SCG switching or reducing the disconnection of SCG connection, and improving the communication performance of the terminal. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

[0018] Figure 2 is a schematic flow chart of a conditional switching method according to an embodiment of the present application;

[0019] Figure 3 is a schematic flow chart of a conditional switching method according to an embodiment of the present application;

[0020] Figure 4 is a structural schematic diagram of a conditional switching device according to an embodiment of the present application;

[0021] Figure 5 is a structural schematic diagram of a conditional switching device according to an embodiment of the present application;

[0022] Figure 6 is a structural schematic diagram of a communication device according to an embodiment of the present application;

[0023] Figure 7 is a structural schematic diagram of a terminal according to an embodiment of the present application;

[0024] Figure 8 is a structural schematic diagram of a network side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0026] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0028] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 can be a terminal side device such as a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a palm computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart ankle bracelet, a smart ankle chain, etc.), a smart wristband, smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network side device 12 can include an access network device or a core network device. The access network device can also be referred to as a radio access network device, a radio access network (RAN), a radio access network function, or a radio access network unit. The access network device can include a base station, a WLAN access point, or a WiFi node, etc. The base station can be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home node B, a home evolved node B, a transmitting receiving point (TRP), or some other appropriate terminology in the art, as long as the same technical effects are achieved. The base station is not limited to a specific technical term, and it should be noted that only the base station in the NR system is taken as an example for description in the embodiments of the present application, and the specific type of the base station is not limited.

[0029] The conditional handover method provided by the embodiments of the present application will be described in detail in combination with the accompanying drawings and some embodiments and application scenarios.

[0030] As shown in Figure 2 The embodiments of the present application provide a conditional handover method 200, which can be executed by a terminal, in other words, the method can be executed by software or hardware installed in the terminal, and the method comprises the following steps.

[0031] S202: The terminal evaluates a master cell group (MCG) execution condition and at least one of the following: a secondary cell group (SCG) execution condition, a conditional PSCell addition or change (CPAC) execution condition.

[0032] The embodiments of the present application can be applied in the scenario of dual connectivity (DC) conditional handover, such as the scenario of multi radio dual connectivity (MR-DC) conditional handover.

[0033] In this embodiment, when performing conditional handover, the terminal can evaluate one of the following in addition to the MCG execution condition: 1) the SCG execution condition, 2) the CPAC execution condition, and 3) the SCG execution condition and the CPAC execution condition. The MCG execution condition mentioned above can also be referred to as a conditional handover (CHO) execution condition.

[0034] Optionally, before S202, the terminal can also receive a conditional handover message comprising at least one conditional reconfiguration (or conditional configuration), and the conditional handover message can comprise target SCG configuration and / or CPAC configuration. For example, the conditional handover message received by the terminal comprises three conditional configurations, which are: 1) conditional configuration 1: PCell1 configuration, comprising target SCG configuration; 2) conditional configuration 2: PCell2 configuration, not comprising target SCG configuration or CPAC configuration; and 3) conditional configuration 3: PCell3 configuration, comprising CPAC configuration.

[0035] S204: The terminal performs conditional handover according to the evaluation result.

[0036] It can be understood that in the case where the terminal evaluates the SCG execution condition in S202, the evaluation result in this step can comprise: satisfying the SCG execution condition or not satisfying the SCG execution condition; and in the case where the terminal evaluates the CPAC execution condition in S202, the evaluation result in this step can comprise: satisfying the CPAC execution condition or not satisfying the CPAC execution condition.

[0037] This step, for example, if the SCG execution condition is met, the terminal can perform conditional handover with SCG configuration (CHO with SCG Configuration); if the SCG execution condition is not met, the terminal can perform conditional handover without SCG configuration, i.e. traditional conditional handover.

[0038] This step, for example, if the CPAC execution condition is met, the terminal can perform conditional handover with CPAC (CHO with CPAC); if the CPAC execution condition is not met, the terminal can perform conditional handover without CPAC, i.e. traditional conditional handover.

[0039] This step, for example, if the SCG execution condition is met and the CPAC execution condition is met, the terminal can perform conditional handover with CPAC; or perform conditional handover with SCG configuration.

[0040] The conditional handover method provided by the embodiments of the present application is beneficial to improve the success rate of SCG handover or reduce the disconnection of SCG connection, and improve the communication performance of the terminal.

[0041] For the above-mentioned beneficial to improve the success rate of SCG handover, the following will be described in detail: for the case that the conditional handover configuration contains target SCG configuration, the terminal can evaluate the execution condition of MCG conditional handover (i.e. MCG execution condition) to select the primary cell (PCell) that meets the condition, if the SCG execution condition is not evaluated, the signal condition of the target SCG cannot be guaranteed, which may cause SCG handover failure in the handover process. To solve the technical problem, for the conditional handover carrying the target SCG configuration, the embodiments of the present application evaluate the SCG execution condition, which is beneficial to optimize the target SCG cell, and is beneficial to improve the success rate of SCG handover and improve the communication performance of the terminal.

[0042] For the above-mentioned advantage of reducing SCG connection disconnection, the following will be described in detail: for the case of conditional handover configuration containing CPAC, if the terminal evaluates the execution condition of MCG conditional handover (i.e. MCG execution condition) to select a PCell that meets the condition, and then evaluates the CPAC execution condition on the target cell to perform the CPAC process after handover to the target cell, this will likely cause the SCG connection existing before handover to be interrupted after handover, and the SCG connection cannot be established until the CPAC process is completed. To solve this technical problem, for conditional handover containing CPAC configuration, the embodiments of the present application advantageously evaluate the CPAC execution condition during the conditional handover process, which advantageously enables the CPAC process to be performed at the same time, thereby advantageously reducing SCG connection disconnection and improving the communication performance of the terminal.

[0043] The embodiments 200 mention that the terminal evaluates at least one of the SCG execution condition and the CPAC execution condition, which will be described in detail in the following several cases.

[0044] Case one, the terminal evaluates the SCG execution condition.

[0045] This case one can also be referred to as conditional handover containing target SCG configuration (CHO with SCG configuration).

[0046] In this embodiment, before the terminal evaluates the MCG execution condition, the method further includes: the terminal receives a conditional handover message containing target SCG configuration, and the conditional handover message contains at least one first conditional reconfiguration. The first conditional reconfiguration is accompanied by the word "first", which is only used to distinguish it from the second conditional reconfiguration in case two, and does not represent any other meaning. Therefore, the first conditional reconfiguration is also referred to as conditional reconfiguration in some places in the text.

[0047] The first conditional reconfiguration includes a target execution condition and a conditional RRC reconfiguration, that is, the conditional handover message includes at least one target execution condition. Optionally, one first conditional reconfiguration contains one target execution condition.

[0048] Optionally, the target execution condition of any one of them includes at least one of the following 1) to 4):

[0049] 1) the MCG execution condition, which can also be referred to as CHO execution condition.

[0050] 2) the SCG execution condition, which will be described in detail later.

[0051] 3) the duration of a first timer, and the first timer is used to control the duration of the evaluation of the SCG execution condition.

[0052] Optionally, after the MCG execution condition is satisfied, the terminal can start the first timer to control the time length of subsequent evaluation of the SCG execution condition; wherein the time length of the first timer can be 0. The first timer can be included in the MCG execution condition or the SCG execution condition.

[0053] 4) SCG evaluation indication, which is used to indicate whether to evaluate the SCG execution condition.

[0054] It can be understood that this embodiment can also indicate whether to evaluate the SCG execution condition by whether to configure the SCG execution condition or the first timer, for example, if the SCG execution condition or the first timer is configured, it means that the SCG execution condition needs to be evaluated.

[0055] Optionally, the first condition reconfiguration includes a condition RRC reconfiguration, which includes: 1) MCG configuration, which includes candidate PCell configuration, and the candidate PCell includes target primary cell PCell. 2) Optionally, it includes target SCG configuration, which includes target primary secondary cell PSCell configuration. Wherein, one condition RRC reconfiguration includes 0 or one target SCG configuration.

[0056] Optionally, the SCG execution condition related configuration includes at least one of the following:

[0057] 1) First measurement ID, which is associated with the SCG execution condition. The measurement corresponding to the first measurement ID can be configured by the network side device.

[0058] 2) Second measurement ID, wherein the measurement event corresponding to the second measurement ID is triggered, and it is considered that the SCG execution condition is satisfied.

[0059] 3) First measurement event, which is applied to the source PSCell and / or the target PSCell. The first measurement event can be, for example, A3 measurement event or A5 measurement event. Wherein, the A3 measurement event includes: the signal quality of the neighbor cell is higher than the signal quality of a specific cell (such as primary secondary cell) by an offset value (Neighbour becomes offset better than SpCell). The A5 measurement event includes: the signal quality of a specific cell (such as primary secondary cell) is lower than a first threshold, and the signal quality of a neighbor cell is higher than a second threshold (SpCell becomes worse than threshold1 and neighbour becomes better than threshold2).

[0060] 4) A second measurement event, in which a serving cell is the target PSCell. The second measurement event can be, for example, an Al measurement event, in which a serving cell is the target PSCell. The Al measurement event includes: the serving cell signal quality becomes better than a threshold (Serving becomes better than threshold).

[0061] 5) A third measurement event, in which a neighbour cell is the target PSCell. The third measurement event can be, for example, an A4 measurement event or a Bl measurement event. The A4 measurement event includes: the neighbour cell signal quality becomes better than a threshold (Neighbour becomes better than threshold). The Bl measurement event includes: the inter-RAT neighbour cell signal quality becomes better than a threshold (Inter RAT neighbour becomes better than threshold).

[0062] 6) A target threshold, in which the signal quality measurement of the target PSCell is better than the target threshold, the SCG execution condition is considered to be satisfied.

[0063] 7) A duration of a first timer, which is used to control the duration of the evaluation of the SCG execution condition.

[0064] Optionally, after the MCG execution condition is satisfied, the terminal can start the first timer to control the duration of the subsequent evaluation of the SCG execution condition; wherein the duration of the first timer can be 0. The first timer can be included in the MCG execution condition or the SCG execution condition.

[0065] Optionally, the configuration related to the SCG execution condition is included in at least one of the following:

[0066] 1) In the (target) SCG configuration in the conditional RRC reconfiguration.

[0067] 2) In the MCG execution condition.

[0068] 3) In the conditional reconfiguration.

[0069] In this embodiment, for a certain (first) conditional reconfiguration, if the conditional reconfiguration includes the target SCG configuration, the terminal evaluates the MCG execution condition and the SCG execution condition; if the conditional reconfiguration does not include the target SCG configuration, the terminal can only evaluate the MCG execution condition.

[0070] Optionally, in this embodiment, after the terminal evaluates the MCG execution condition and the SCG execution condition, the method further includes at least one of the following 1) to 4):

[0071] 1) In case that there is a candidate PCell satisfying the MCG execution condition, if the corresponding conditional reconfiguration includes a target SCG configuration, and the SCG included in the target SCG configuration does not satisfy the SCG execution condition, and / or if at least one conditional reconfiguration contains a target SCG configuration, start the first timer.

[0072] For example, multiple conditional reconfigurations, conditional reconfiguration 1: PCell1, with target SCG configuration; conditional reconfiguration 2: PCell2, without target SCG configuration. In case that PCell1 satisfies the MCG execution condition, if the SCG does not satisfy the SCG execution condition, start the first timer; in case that PCell2 satisfies the MCG execution condition, start the first timer. Optionally, if the duration of the first timer is 0, it means that the first timer is not started.

[0073] 2) During the running of the first timer, continue to evaluate the MCG execution condition and the SCG execution condition.

[0074] For example, if at least one conditional reconfiguration contains a target SCG configuration, the terminal starts the first timer, and during the running of the first timer, the terminal continues to evaluate the MCG execution condition and the SCG execution condition.

[0075] For example, conditional reconfiguration 1 includes PCell1 and target SCG configuration, and conditional reconfiguration 2 includes PCell2 but does not contain target SCG configuration. In case that PCell1 satisfies the MCG execution condition, but the SCG in conditional reconfiguration 1 does not satisfy the SCG execution condition, the terminal can start the first timer. During the running of the first timer, the terminal continues to evaluate whether PCell2 in conditional reconfiguration 2 satisfies the MCG execution condition, and whether the SCG in conditional reconfiguration 1 satisfies the SCG execution condition, and so on.

[0076] For example, if the MCG execution condition is satisfied, and the SCG execution condition is satisfied, and the candidate PCell cell included in the conditional reconfiguration is the target PCell cell, stop the first timer.

[0077] 4) If the first timer expires, stop evaluating the MCG execution condition and / or the SCG execution condition.

[0078] The first timer is used to control the duration of the evaluation of the SCG execution condition, and the duration of the first timer can be agreed in a protocol or configured by a network side device. The specific role of the first timer can be referred to the foregoing description.

[0079] It should be noted that the embodiment can only perform one of the above 1) to 4), and can also simultaneously perform multiple of the above 1) to 4).

[0080] Optionally, the terminal performs conditional handover according to the evaluation result, and the conditional handover includes at least one of the following 1) to 6):

[0081] 1) If the MCG execution condition is met, the first conditional handover or the second conditional handover is performed.

[0082] 2) If the MCG execution condition is met and the first timer is expired, the second conditional handover is performed, and the first timer is used to control the duration of the evaluation of the SCG execution condition.

[0083] 3) If the MCG execution condition and the SCG execution condition are met, the first conditional handover is performed.

[0084] 4) If the MCG execution condition is met and the SCG execution condition is not met, the second conditional handover is performed.

[0085] 5) In a case where the first conditional handover or the second conditional handover is supported to be performed, the first conditional handover is performed.

[0086] For example, in a case where the first conditional handover or the second conditional handover is supported to be performed, the first conditional handover is preferentially performed. Optionally, after the first conditional handover is preferentially performed, if the first conditional handover fails, the second conditional handover can also be performed.

[0087] 6) In a case where multiple candidate PCells meet the MCG execution condition, a candidate PCell corresponding to a conditional reconfiguration that meets the SCG execution condition is selected as a target PCell, or a candidate PCell corresponding to a conditional reconfiguration that contains a strongest candidate primary secondary cell PSCell is selected as the target PCell.

[0088] For example, in a case where multiple candidate PCells meet the MCG execution condition, a candidate PCell corresponding to a conditional reconfiguration that meets the SCG execution condition is preferentially selected as a target PCell, or a candidate PCell corresponding to a conditional reconfiguration that contains a strongest candidate PSCell is preferentially selected as the target PCell.

[0089] The first conditional handover (CHO with SCG Configuration) includes performing conditional handover, switching to a target PCell, and applying a target SCG configuration, i.e., performing conditional handover with SCG configuration (CHO with SCG Configuration).

[0090] The second conditional handover includes performing conditional handover and switching to a target PCell.

[0091] Optionally, the second conditional handover further includes, in a case where the conditional reconfiguration corresponding to the target PCell includes a target SCG configuration, not applying the target SCG configuration.

[0092] In each of the foregoing embodiments, in a case where the terminal performs the second conditional handover, the method further includes that the terminal sends a conditional handover completion message, and the conditional handover completion message includes at least one of the following: an SCG failure indication, SCG failure type (FailureType) information, an SCG measurement result, and a measurement result of at least one target PSCell. The SCG failure type includes, for example, SCG attempt failure, SCG not attempted, SCG execution condition not satisfied, and the like.

[0093] Case two: the terminal evaluates a CPAC execution condition.

[0094] This case two can also be referred to as conditional handover configuration with CPAC (CHO with CPAC).

[0095] In this embodiment, before the terminal evaluates the MCG execution condition, the method further includes that the terminal receives a conditional handover message containing CPAC, and the conditional handover message contains at least one second conditional reconfiguration. The second conditional reconfiguration includes at least one of the following:

[0096] 1) MCG execution condition, also referred to as CHO execution condition, contains a measurement event such as A3 measurement event, A5 measurement event, and is applicable to an MCG candidate cell.

[0097] 2) MCG reconfiguration. The MCG reconfiguration contains a candidate PCell configuration. The candidate PCell cell contains a target PCell.

[0098] 3) CPAC conditional reconfiguration. The CPAC conditional reconfiguration includes a CPAC execution condition and at least one SCG configuration. The SCG configuration contains a candidate PSCell configuration. The candidate PSCell cell contains a target PSCell.

[0099] Optionally, the CPAC configuration is contained in the MCG reconfiguration.

[0100] In this embodiment, for a certain (second) conditional reconfiguration, if the conditional reconfiguration includes a CPAC conditional reconfiguration, the terminal evaluates the MCG execution condition and the CPAC execution condition; if the conditional reconfiguration does not include a CPAC conditional reconfiguration, the terminal can only evaluate the MCG execution condition.

[0101] Optionally, after the terminal evaluates the MCG execution condition and the CPAC execution condition, the method further includes at least one of the following 1) to 4):

[0102] 1) If a candidate PCell satisfies the MCG execution condition, and the CPAC execution condition included in the conditional reconfiguration corresponding to the candidate PCell is not satisfied, and / or at least one conditional reconfiguration includes a CPAC configuration, start a first timer.

[0103] For example, multiple conditional reconfigurations, conditional reconfiguration 1: PCell1, with CPAC; conditional reconfiguration 2: PCell2, without including a target SCG and CPAC. In the case where PCell1 satisfies the MCG execution condition, if the CPAC execution condition is not satisfied, start the first timer; in the case where PCell2 satisfies the MCG execution condition, start the first timer. Optionally, if the duration of the first timer is 0, it means that the first timer is not started.

[0104] 2) Continue to evaluate the MCG execution condition and the CPAC execution condition during the running of the first timer.

[0105] 3) If the MCG execution condition is satisfied and the CPAC execution condition is satisfied, stop the first timer.

[0106] For example, for a certain second conditional reconfiguration, the MCG execution condition is satisfied, and when the CPAC execution condition thereof is satisfied, the candidate PCell cell included in the second conditional reconfiguration is a target PCell cell, and the candidate PSCell cell included in the CPAC conditional reconfiguration is a target PSCell cell, the terminal stops the first timer.

[0107] 4) If the first timer times out, stop evaluating the MCG execution condition and / or the CPAC execution condition.

[0108] The first timer is used to control the duration of the CPAC execution condition evaluation, and the duration of the first timer can be agreed by the protocol or configured by the network side device. The specific role of the first timer can be referred to the foregoing description.

[0109] It should be noted that the embodiment can only perform one of the above 1) to 4), and can also simultaneously perform multiple of the above 1) to 4).

[0110] Optionally, the terminal performs conditional handover according to the evaluation result, including at least one of the following:

[0111] 1) If the MCG execution condition is met, perform third conditional handover or fourth conditional handover.

[0112] 2) If the MCG execution condition is met, and after the first timer expires, perform fourth conditional handover, wherein the first timer is used to control the duration of evaluating the CAPC execution condition.

[0113] 3) If the MCG execution condition and the CPAC execution condition are met, perform third conditional handover.

[0114] 4) If the MCG execution condition is met and the CPAC execution condition is not met, perform fourth conditional handover.

[0115] 5) In the case where multiple candidate PCells meet the MCG execution condition, select a candidate PCell corresponding to a conditional reconfiguration that meets the CPAC execution condition as the target PCell, or select a candidate PCell corresponding to a conditional reconfiguration that contains the strongest candidate PSCell as the target PCell.

[0116] Wherein, the third conditional handover includes: performing conditional handover and performing CPAC, i.e. performing conditional handover with CPAC (CHO with CPAC).

[0117] In the case of performing the third conditional handover, the method further includes: the terminal sending an RRC message to the target PCell, wherein the RRC message is used to indicate that the conditional handover is completed. Optionally, the RRC message contains a CPAC completion message, and the RRC message contains related information of the target PSCell.

[0118] For example, the terminal sends an RRC message, such as an RRC reconfiguration completion message (RRCReconfigurationComplete), to the target PCell, which is denoted as a CHO completion message, which is used to indicate that the CHO handover is completed, and contains a CPAC completion message such as RRCReconfigurationComplete. The CHO completion message contains target PSCell related information, such as the conditional configuration ID of the target PSCell in the CPAC conditional configuration.

[0119] The fourth conditional handover includes: performing conditional handover but not performing CPAC.

[0120] In case the fourth conditional handover is performed, the method further comprises: the terminal sending a conditional handover completion message (such as RRCReconfigurationComplete), the conditional handover completion message comprising at least one of the following: an SCG failure indication; SCG failure type information; SCG measurement results; measurement results of the CPAC candidate cell.

[0121] Case three, the terminal evaluates the SCG execution condition and the CPAC execution condition.

[0122] In this embodiment, the terminal performing conditional handover according to the evaluation result comprises at least one of the following:

[0123] a) If the MCG execution condition and the CPAC execution condition are met, performing third conditional handover.

[0124] b) If the MCG execution condition and the SCG execution condition are met, performing first conditional handover.

[0125] c) If the CPAC is configured, and the MCG execution condition is met but the CPAC execution condition is not met, performing fourth conditional handover.

[0126] d) If the SCG is configured, and the MCG execution condition is met but the SCG execution condition is not met, performing second conditional handover.

[0127] e) If the conditional handover message received by the terminal does not contain CPAC configuration or SCG configuration, performing fifth conditional handover, i.e., performing traditional CHO handover.

[0128] f) If the conditional handover message received by the terminal contains CPAC configuration and / or SCG configuration, but the SCG execution condition or the CPAC execution condition is not met, performing fifth conditional handover, i.e., performing traditional CHO handover.

[0129] It should be noted that a) and b) above are not in any particular order; c) and d) are also not in any particular order.

[0130] To provide a detailed description of the conditional handover method provided by the embodiments of the present application, the following will be described in conjunction with several specific embodiments.

[0131] Embodiment one

[0132] In this embodiment, the conditional handover message received by the terminal contains SCG configuration (CHO with SCG configuration), and the embodiment comprises the following steps:

[0133] Step 1: UE receives a conditional handover message containing SCG configuration; the conditional handover message contains SCG execution condition.

[0134] Step 2: UE evaluates CHO execution condition, optionally, simultaneously evaluates SCG execution condition.

[0135] Step 3: After CHO execution condition is satisfied, perform conditional handover, including one of the following: 1) if SCG execution condition is satisfied, perform first conditional handover; 2) if SCG execution condition is not satisfied, perform second conditional handover. The first conditional handover and the second conditional handover can be referred to the introduction of the previous embodiments.

[0136] Embodiment two

[0137] In this embodiment, the conditional handover message received by the terminal contains SCG configuration (CHO with SCG configuration), and also contains the duration of the first timer. This embodiment includes the following steps:

[0138] Step 1: UE receives a conditional handover message containing SCG configuration; the conditional handover message contains SCG execution condition.

[0139] Step 2: UE evaluates CHO execution condition, optionally, simultaneously evaluates SCG execution condition.

[0140] Step 3: After CHO execution condition is satisfied, start the first timer. If SCG execution condition is satisfied, stop the first timer.

[0141] Step 4: UE performs conditional handover after the first timer expires or SCG execution condition is satisfied, including one of the following: 1) if SCG execution condition is satisfied, perform first conditional handover; 2) if SCG execution condition is not satisfied, perform second conditional handover. The first conditional handover and the second conditional handover can be referred to the introduction of the previous embodiments.

[0142] Embodiment three

[0143] In this embodiment, the conditional handover message received by the terminal contains CPAC configuration (CHO with CPAC). This embodiment includes the following steps:

[0144] Step 1: UE receives a conditional handover message containing CPAC.

[0145] Step 2: UE evaluates CHO execution condition, optionally, simultaneously evaluates CPAC execution condition.

[0146] Step 3: After CHO execution condition is met, perform condition switching, including one of the following: 1) if CPAC execution condition is met, perform third condition switching; 2) if CPAC execution condition is not met, perform fourth condition switching. The third condition switching and the fourth condition switching can be referred to the introduction of the previous embodiments.

[0147] Embodiment Four

[0148] In this embodiment, the condition switching message received by the terminal contains CPAC configuration (CHO with CPAC), and also contains the duration of the first timer. This embodiment includes the following steps:

[0149] Step 1: UE receives the condition switching message containing CPAC.

[0150] Step 2: UE evaluates CHO execution condition, and optionally, evaluates CPAC execution condition at the same time.

[0151] Step 3: After CHO execution condition is met, start the first timer. If CPAC execution condition is met, stop the first timer.

[0152] Step 4: After the first timer expires or CPAC execution condition is met, UE performs condition switching, including one of the following: 1) if CPAC execution condition is met, perform third condition switching; 2) if CPAC execution condition is not met, perform fourth condition switching. The third condition switching and the fourth condition switching can be referred to the introduction of the previous embodiments.

[0153] Embodiment Five

[0154] In this embodiment, the condition switching message received by the terminal contains SCG configuration and CPAC configuration, i.e. hybrid configuration (CHO with CPAC and CHO with SCG Config). This embodiment includes the following steps:

[0155] Step 1: UE receives the condition switching message. The condition switching message contains at least one of the following: first condition reconfiguration; second condition reconfiguration; CHO condition reconfiguration, which does not contain SCG configuration or CPAC.

[0156] Step 2: UE evaluates CHO execution condition, and optionally, evaluates SCG execution condition and / or CPAC execution condition at the same time.

[0157] Step 3: After CHO execution condition is met, start the first timer. If SCG execution condition or CPAC execution condition is met, stop the first timer.

[0158] Step 4: After the first timer expires, or the SCG execution condition or the CPAC execution condition is met, the UE execution condition is switched, including one of the following:

[0159] a) If the CPAC execution conditions are met, execute the third condition switch.

[0160] b) If the SCG execution conditions are met, perform the first condition switch.

[0161] c) If CPAC is configured and the CPAC execution conditions are not met, execute the fourth condition switch.

[0162] d) If SCG is configured and the SCG execution conditions are not met, execute the second condition switch.

[0163] e) If the conditional switching message does not contain CPAC or SCG configuration, perform the fifth conditional switching, i.e., the traditional CHO switching.

[0164] f) If the conditional switching message received by the terminal contains CPAC configuration and / or SCG configuration, but does not meet the SCG execution condition or the CPAC execution condition, perform the fifth conditional switching, i.e., perform the traditional CHO switching.

[0165] It should be noted that a) and b) above are not in any particular order; c) and d) are also not in any particular order.

[0166] The above combination Figure 2 The condition switching method according to embodiments of this application is described in detail. The following will combine... Figure 3 A conditional switching method according to another embodiment of this application is described in detail. It will be understood that the interaction between the network-side device and the terminal, as described from the perspective of the network-side device, is... Figure 2 The terminal-side descriptions in the methods shown are the same or corresponding; to avoid repetition, relevant descriptions are omitted as appropriate.

[0167] Figure 3 This is a schematic diagram illustrating the implementation flow of the conditional switching method according to an embodiment of this application, which can be applied to network-side devices. For example... Figure 3 As shown, the method 300 includes the following steps.

[0168] S302: The network-side device sends a condition switching message to the terminal. The condition switching message includes at least one target execution condition, which includes at least one of the following: SCG execution condition; duration of a first timer, which is used to control the duration of SCG execution condition evaluation; and SCG evaluation indication, which is used to indicate whether to evaluate the SCG execution condition.

[0169] In the embodiments of the present application, the network side device sends a conditional handover message to the terminal, and the conditional handover message includes at least one target execution condition, and the target execution condition includes at least one of the following: an SCG execution condition; a time length of a first timer, the first timer being used for controlling a time length of SCG execution condition evaluation; and an SCG evaluation indication, the SCG evaluation indication being used for indicating whether to evaluate the SCG execution condition. In this way, the terminal can evaluate the SCG execution condition in addition to evaluating the MCG execution condition when performing conditional handover, and perform conditional handover according to the evaluation result, which is beneficial to improving the success rate of SCG handover and improving the communication performance of the terminal.

[0170] Optionally, as one embodiment, the SCG execution condition related configuration includes at least one of the following 1) to 7):

[0171] 1) a first measurement ID, the first measurement ID being associated with the SCG execution condition.

[0172] 2) a second measurement ID, wherein after a measurement event corresponding to the second measurement ID is triggered, it is considered that the SCG execution condition is met.

[0173] 3) a first measurement event, the first measurement event being applied to a source PSCell and / or a target PSCell.

[0174] 4) a second measurement event, a serving cell in the second measurement event being a target PSCell.

[0175] 5) a third measurement event, a neighbor cell in the third measurement event being a target PSCell.

[0176] 6) a target threshold, wherein after a signal quality measurement value of the target PSCell is better than the target threshold, it is considered that the SCG execution condition is met.

[0177] 7) a time length of a first timer, the first timer being used for controlling a time length of the SCG execution condition evaluation.

[0178] Optionally, as one embodiment, the SCG execution condition related configuration is contained in at least one of the following: 1) an SCG configuration in a conditional RRC reconfiguration; 2) an MCG execution condition; and 3) a conditional reconfiguration.

[0179] Optionally, as an embodiment, after the network-side device sends the conditional handover message to the terminal, the method further includes: the network-side device receiving a conditional handover completion message sent by the terminal, the conditional handover completion message including at least one of the following: 1) an SCG failure indication; 2) SCG failure type information; 3) SCG measurement results; 4) measurement results of at least one target PSCell; 5) measurement results of a CPAC candidate cell. The conditional handover method provided in the embodiments of the present application can be executed by a conditional handover device. The conditional handover device provided in the embodiments of the present application is described by taking the conditional handover device executing the conditional handover method as an example.

[0180] Figure 4 is a structural schematic diagram of a conditional handover device according to the embodiments of the present application, which can correspond to the terminal in other embodiments. As shown in Figure 4 , the device 400 includes the following modules.

[0181] The processing module 402 is configured to evaluate the MCG execution condition and at least one of the following: the SCG execution condition, the CPAC execution condition.

[0182] The handover module 404 is configured to perform conditional handover according to the evaluation result.

[0183] The conditional handover device provided in the embodiments of the present application can evaluate at least one of the SCG execution condition and the CPAC execution condition in addition to the MCG execution condition when performing conditional handover, and perform conditional handover according to the evaluation result, which is conducive to improving the success rate of SCG handover or reducing SCG connection disconnection, and improving communication performance.

[0184] Optionally, as an embodiment, the processing module 402 is further configured to perform at least one of the following 1) to 4):

[0185] 1) If there is a candidate PCell satisfying the MCG execution condition, and the conditional reconfiguration corresponding to the candidate PCell includes a target SCG configuration, and the SCG included in the target SCG configuration does not satisfy the SCG execution condition, and / or if at least one conditional reconfiguration contains a target SCG configuration, start a first timer.

[0186] 2) Continue to evaluate the MCG execution condition and the SCG execution condition during the running of the first timer.

[0187] 3) If the MCG execution condition is satisfied and the SCG execution condition is satisfied, stop the first timer.

[0188] 4) If the first timer times out, stop evaluating the MCG execution condition and / or the SCG execution condition.

[0189] The first timer is configured to control a time length of evaluating the SCG execution condition.

[0190] Optionally, as an embodiment, the switching module 404 is configured to at least one of the following 1) to 6):

[0191] 1) if the MCG execution condition is met, performing a first conditional handover or a second conditional handover.

[0192] 2) if the MCG execution condition is met and a first timer expires, performing the second conditional handover, the first timer being configured to control a time length of evaluating the SCG execution condition.

[0193] 3) if the MCG execution condition and the SCG execution condition are met, performing the first conditional handover.

[0194] 4) if the MCG execution condition is met and the SCG execution condition is not met, performing the second conditional handover.

[0195] 5) in a case where the first conditional handover or the second conditional handover is supported to be performed, performing the first conditional handover.

[0196] 6) in a case where multiple candidate PCells meet the MCG execution condition, selecting a candidate PCell corresponding to a conditional reconfiguration meeting the SCG execution condition as a target PCell, or selecting a candidate PCell containing a strongest candidate PSCell as the target PCell.

[0197] The first conditional handover includes: performing a conditional handover to switch to a target PCell and applying a target SCG configuration; and the second conditional handover includes: performing a conditional handover to switch to the target PCell.

[0198] Optionally, as an embodiment, the second conditional handover further includes: in a case where the conditional reconfiguration corresponding to the target PCell includes the target SCG configuration, not applying the target SCG configuration.

[0199] Optionally, as an embodiment, the apparatus further includes a sending module configured to, in a case where the second conditional handover is performed, send a conditional handover completion message, the conditional handover completion message including at least one of the following: an SCG failure indication; SCG failure type information; an SCG measurement result; and a measurement result of at least one target PSCell.

[0200] Optionally, as one embodiment, the apparatus further comprises a receiving module, configured to receive a conditional handover message, wherein the conditional handover message comprises at least one target execution condition, and the target execution condition comprises at least one of the following: 1) the MCG execution condition; 2) the SCG execution condition; 3) a time length of a first timer, wherein the first timer is used to control a time length of the SCG execution condition evaluation; and 4) an SCG evaluation indication, wherein the SCG evaluation indication is used to indicate whether to evaluate the SCG execution condition.

[0201] Optionally, as one embodiment, the SCG execution condition related configuration comprises at least one of the following 1) to 7):

[0202] 1) a first measurement ID, wherein the first measurement ID is associated with the SCG execution condition.

[0203] 2) a second measurement ID, wherein the second measurement ID corresponds to a measurement event trigger, and after the measurement event trigger, the SCG execution condition is considered to be satisfied.

[0204] 3) a first measurement event, wherein the first measurement event is applied to a source PSCell and / or a target PSCell.

[0205] 4) a second measurement event, wherein a serving cell in the second measurement event is a target PSCell.

[0206] 5) a third measurement event, wherein a neighbor cell in the third measurement event is a target PSCell.

[0207] 6) a target threshold, wherein after a signal quality measurement value of the target PSCell is better than the target threshold, the SCG execution condition is considered to be satisfied.

[0208] 7) a time length of a first timer, wherein the first timer is used to control a time length of the SCG execution condition evaluation.

[0209] Optionally, as one embodiment, the SCG execution condition related configuration is contained in at least one of the following: 1) an SCG configuration in a conditional RRC reconfiguration; 2) the MCG execution condition; and 3) a conditional reconfiguration.

[0210] Optionally, as one embodiment, the processing module 402 is further configured to perform at least one of the following 1) to 4):

[0211] 1) if a candidate PCell satisfies the MCG execution condition, and a CPAC execution condition included in a conditional reconfiguration corresponding to the candidate PCell is not satisfied, and / or at least one conditional reconfiguration contains a CPAC configuration, then start a first timer.

[0212] 2) continue to evaluate the MCG execution condition and the CPAC execution condition during the running of the first timer.

[0213] 3) if the MCG execution condition is met and the CPAC execution condition is met, stop the first timer.

[0214] 4) if the first timer expires, stop evaluating the MCG execution condition and / or the CPAC execution condition.

[0215] wherein the first timer is configured to control a duration of the CPAC execution condition evaluation.

[0216] Optionally, as an embodiment, the switching module 404 is configured to at least one of the following 1) to 5):

[0217] 1) if the MCG execution condition is met, perform a third conditional switch or a fourth conditional switch.

[0218] 2) if the MCG execution condition is met and the first timer expires, perform the fourth conditional switch, wherein the first timer is configured to control a duration of evaluating the CAPC execution condition.

[0219] 3) if the MCG execution condition is met and the CPAC execution condition is met, perform the third conditional switch.

[0220] 4) if the MCG execution condition is met and the CPAC execution condition is not met, perform the fourth conditional switch.

[0221] 5) in the case that there are multiple candidate PCells meeting the MCG execution condition, select a candidate PCell corresponding to a conditional reconfiguration meeting the CPAC execution condition as a target PCell, or select a candidate PCell corresponding to a conditional reconfiguration containing a strongest candidate PSCell as the target PCell.

[0222] wherein the third conditional switch comprises performing a conditional switch and performing CPAC, and the fourth conditional switch comprises performing a conditional switch but not performing CPAC.

[0223] Optionally, as an embodiment, the apparatus further comprises a sending module configured to, in the case of performing the third conditional switch, send an RRC message to the target PCell, wherein the RRC message is configured to indicate completion of the conditional switch.

[0224] Optionally, as an embodiment, the RRC message comprises a CPAC completion message, and the RRC message comprises related information of the target PSCell.

[0225] Optionally, as an embodiment, the apparatus further includes a sending module configured to send a conditional handover completion message in the case of performing the fourth conditional handover, the conditional handover completion message including at least one of the following: an SCG failure indication; SCG failure type information; SCG measurement results; measurement results of a CPAC candidate cell.

[0226] The apparatus 400 according to the embodiments of the present application can refer to the flow of the method 200 corresponding to the embodiments of the present application, and each unit / module in the apparatus 400 and the above-mentioned other operations and / or functions are respectively used to implement the corresponding flow in the method 200 and can achieve the same or equivalent technical effects, and for the sake of brevity, will not be repeated here.

[0227] The conditional handover apparatus in the embodiments of the present application can be an electronic device, for example, an electronic device with an operating system, or a component in an electronic device, for example, an integrated circuit or a chip. The electronic device can be a terminal or other equipment other than a terminal. Illustratively, the terminal can include but is not limited to the types of the terminal 11 listed above, and the other equipment can be a server, a network attached storage (NAS), etc., which are not limited in the embodiments of the present application.

[0228] Figure 5 is a structural schematic diagram of the conditional handover apparatus according to the embodiments of the present application, which can correspond to the network side device in other embodiments. As shown in Figure 5 The apparatus 500 includes the following modules.

[0229] The sending module 502 is configured to send a conditional handover message to a terminal, the conditional handover message including at least one target execution condition, the target execution condition including at least one of the following: an SCG execution condition; a time length of a first timer, the first timer being used to control the time length of the SCG execution condition evaluation; and an SCG evaluation indication, the SCG evaluation indication being used to indicate whether to evaluate the SCG execution condition.

[0230] Optionally, the apparatus 500 further includes a processing module, such as a processor, etc.

[0231] In the embodiments of the present application, the sending module sends a conditional handover message to the terminal, and the conditional handover message comprises at least one target execution condition, and the target execution condition comprises at least one of the following: an SCG execution condition; a time length of a first timer, the first timer being used for controlling a time length of SCG execution condition evaluation; and an SCG evaluation indication, the SCG evaluation indication being used for indicating whether to evaluate the SCG execution condition. In this way, the terminal can evaluate the SCG execution condition in addition to evaluating the MCG execution condition when performing conditional handover, and perform conditional handover according to the evaluation result, which is beneficial to improving the success rate of SCG handover and improving the communication performance of the terminal.

[0232] Optionally, as one embodiment, the SCG execution condition related configuration comprises at least one of the following 1) to 7):

[0233] 1) a first measurement ID, the first measurement ID being associated with the SCG execution condition.

[0234] 2) a second measurement ID, wherein after a measurement event corresponding to the second measurement ID is triggered, the SCG execution condition is considered to be met.

[0235] 3) a first measurement event, the first measurement event being applied to a source PSCell and / or a target PSCell.

[0236] 4) a second measurement event, a serving cell in the second measurement event being the target PSCell.

[0237] 5) a third measurement event, a neighboring cell in the third measurement event being the target PSCell.

[0238] 6) a target threshold, wherein after a signal quality measurement value of the target PSCell is better than the target threshold, the SCG execution condition is considered to be met.

[0239] 7) a time length of a first timer, the first timer being used for controlling a time length of the SCG execution condition evaluation.

[0240] Optionally, as one embodiment, the SCG execution condition related configuration is contained in at least one of the following: 1) an SCG configuration in a conditional RRC reconfiguration; 2) an MCG execution condition; and 3) a conditional reconfiguration.

[0241] Optionally, as one embodiment, the apparatus further comprises a receiving module configured to receive a conditional handover completion message sent by the terminal, and the conditional handover completion message comprises at least one of the following: 1) an SCG failure indication; 2) SCG failure type information; 3) an SCG measurement result; 4) a measurement result of at least one target PSCell; and 5) a measurement result of a CPAC candidate cell.

[0242] The apparatus 500 according to the embodiments of the present application can refer to the flow of the method 300 according to the embodiments of the present application, and each unit / module in the apparatus 500 and the above-mentioned other operations and / or functions are respectively used to implement the corresponding flow in the method 300 and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be described here again.

[0243] The conditional switching apparatus provided by the embodiments of the present application can implement each process of the method embodiments of Figure 2 or Figure 3 The same technical effects can be achieved, and for the sake of brevity, they will not be described here again.

[0244] Optionally, as shown in Figure 6 The embodiments of the present application also provide a communication device 600, which includes a processor 601 and a memory 602, and the memory 602 stores programs or instructions executable on the processor 601. For example, when the communication device 600 is a terminal, the programs or instructions are executed by the processor 601 to implement each step of the above conditional switching method embodiments and can achieve the same technical effects. For the sake of brevity, they will not be described here again. When the communication device 600 is a network side device, the programs or instructions are executed by the processor 601 to implement each step of the above conditional switching method embodiments and can achieve the same technical effects. For the sake of brevity, they will not be described here again.

[0245] The embodiments of the present application also provide a terminal, which includes a processor and a communication interface, and the processor is used to evaluate an MCG execution condition and at least one of the following: an SCG execution condition, a CPAC execution condition; and perform conditional switching according to the evaluation result. The terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation manner of the above-mentioned method embodiment can be applicable to the terminal embodiment and can achieve the same technical effects. Specifically, Figure 7 A hardware structure diagram of a terminal for implementing the embodiments of the present application.

[0246] The terminal 700 includes, but is not limited to, at least part of the components such as a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.

[0247] Those skilled in the art can understand that the terminal 700 can also include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 710 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. Figure 7The terminal structure shown in the figure does not constitute a limitation on the terminal, and the terminal can include more or fewer components than the figure, or combine certain components, or different component arrangements, which are not described here.

[0248] It should be understood that in the embodiments of the present application, the input unit 704 can include a graphics processing unit (GPU) 7041 and a microphone 7042. The graphics processor 7041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 706 can include a display panel 7061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 can include two parts of a touch detection device and a touch controller. The other input devices 7072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, which are not described here.

[0249] In the embodiments of the present application, after the radio frequency unit 701 receives the downlink data from the network side device, it can be transmitted to the processor 710 for processing. In addition, the radio frequency unit 701 can send uplink data to the network side device. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0250] The memory 709 can be used to store software programs or instructions and various data. The memory 709 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 709 can include a volatile memory or a non-volatile memory, or the memory 709 can include both volatile and non-volatile memories. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 709 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0251] The processor 710 can include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 710.

[0252] The processor 710 can be used to evaluate the MCG execution condition and at least one of the following: the SCG execution condition, the CPAC execution condition; and perform conditional handover according to the evaluation result.

[0253] The terminal provided in the embodiments of the present application can evaluate at least one of the SCG execution condition and the CPAC execution condition in addition to the MCG execution condition when performing conditional switching, and perform conditional switching according to the evaluation result, which is beneficial to improving the success rate of SCG switching or reducing SCG connection disconnection, and improving the communication performance of the terminal.

[0254] The terminal 700 provided in the embodiments of the present application can also implement each process of the conditional switching method embodiments described above, and achieve the same technical effects. To avoid repetition, details are not described herein again.

[0255] The embodiments of the present application also provide a network side device, which includes a processor and a communication interface. The communication interface is configured to send a conditional switching message to a terminal, where the conditional switching message includes at least one target execution condition, and the target execution condition includes at least one of the following: an SCG execution condition; a time length of a first timer, where the first timer is used to control the time length of the evaluation of the SCG execution condition; and an SCG evaluation indication, where the SCG evaluation indication is used to indicate whether to evaluate the SCG execution condition. The network side device embodiments correspond to the network side device method embodiments described above. Each implementation process and implementation manner of the method embodiments described above can be applied to the network side device embodiments, and the same technical effects can be achieved.

[0256] Specifically, the embodiments of the present application also provide a network side device. As shown in Figure 8 The network side device 800 includes an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81, and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent, and sends the processed information to the radio frequency device 82. The radio frequency device 82 processes the received information and sends it out through the antenna 81.

[0257] The method performed by the network side device in the above embodiments can be implemented in the baseband device 83, which includes a baseband processor.

[0258] The baseband device 83 may, for example, include at least one baseband board, and a plurality of chips are arranged on the baseband board, as shown in Figure 8 One of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call programs in the memory 85 and perform the network device operations shown in the above method embodiments.

[0259] The network side device may also include a network interface 86, which is, for example, a common public radio interface (CPRI).

[0260] Specifically, the network side device 800 of the embodiment of the present application further comprises instructions or programs stored on the memory 85 and executable on the processor 84, and the processor 84 invokes the instructions or programs in the memory 85 to execute the method performed by each module shown in the figure and achieve the same technical effects. To avoid repetition, the details are not described here. Figure 5 The method performed by each module shown in the figure and achieve the same technical effects. To avoid repetition, the details are not described here.

[0261] The embodiment of the present application also provides a readable storage medium, the readable storage medium stores programs or instructions, the programs or instructions are executed by a processor to realize each process of the conditional switching method embodiment described above, and the same technical effects can be achieved. To avoid repetition, the details are not described here.

[0262] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0263] The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run programs or instructions to realize each process of the conditional switching method embodiment described above, and the same technical effects can be achieved. To avoid repetition, the details are not described here.

[0264] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0265] The embodiment of the present application further provides a computer program / program product, the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to realize each process of the conditional switching method embodiment described above, and the same technical effects can be achieved. To avoid repetition, the details are not described here.

[0266] The embodiment of the present application further provides a conditional switching system, including: a terminal and a network side device, the terminal can be used to execute the steps of the conditional switching method as described above

[0267] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by more than one process, method, article, or apparatus either simultaneously, concurrently, or with intervening action that are carried out at the same time, in any order, or in an overlapping manner. For example, the described method can be performed in a different order or simultaneously, and the various steps can be combined or omitted, or additional steps can be added, without departing from the scope of the described method. Also, features described with respect to certain examples can be combined in other examples.

[0268] From the above description of the embodiments, it is apparent that the above-described method can be implemented by means of software and the requisite universal hardware platform, of course, but in many cases the former is the preferred implementation. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk), including a number of instructions for causing a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the method described in the various embodiments of the present application.

[0269] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the specific embodiments described above, which are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A condition switching method, characterized in that, include: The terminal evaluates the execution conditions of the primary cell group MCG and at least one of the following: the execution conditions of the secondary cell group SCG, and the CPAC execution conditions for adding or changing the primary and secondary cells. The terminal performs conditional switching based on the evaluation results; The terminal performing conditional switching based on the evaluation results includes at least one of the following: If the MCG execution conditions are met, then the third condition switch or the fourth condition switch is executed; If the MCG execution conditions are met and the first timer times out, then the fourth condition switch is executed. The first timer is used to control the duration of evaluating the CPAC execution conditions. If the MCG execution conditions and the CPAC execution conditions are met, then the third condition switch is executed; If the MCG execution condition is met but the CPAC execution condition is not met, then the fourth condition switch is executed; If multiple candidate PCells satisfy the MCG execution conditions, select the candidate PCell corresponding to the conditional reconfiguration that satisfies the CPAC execution conditions as the target PCell, or select the candidate PCell corresponding to the conditional reconfiguration that contains the strongest candidate PSCell as the target PCell. The third condition switching includes: performing condition switching and performing CPAC; the fourth condition switching includes: performing condition switching but not performing CPAC. In the case of performing the third conditional handover, the method further includes: the terminal sending an RRC message to the target PCell, the RRC message indicating that the conditional handover is complete; the RRC message includes relevant information about the target PCell; In the case of performing the fourth conditional switch, the method further includes: the terminal sending a conditional switch completion message, the conditional switch completion message including at least one of the following: SCG failure indication; SCG failure type information; SCG measurement results; Measurement results of CPAC candidate cells.

2. The method according to claim 1, characterized in that, After the terminal evaluates the MCG execution conditions and the SCG execution conditions, the method further includes at least one of the following: If a candidate primary cell PCell satisfies the MCG execution conditions, and if the conditional reconfiguration corresponding to the candidate PCell includes a target SCG configuration, and the SCG included in the target SCG configuration does not satisfy the SCG execution conditions, and / or if at least one conditional reconfiguration includes a target SCG configuration, then the first timer is started. During the first timer run, the MCG execution conditions and the SCG execution conditions are continuously evaluated; If both the MCG execution condition and the SCG execution condition are met, then the first timer is stopped; If the first timer times out, the evaluation of the MCG execution conditions and / or the SCG execution conditions will cease. The first timer is used to control the duration of the SCG execution condition evaluation.

3. The method according to claim 1, characterized in that, The conditional switching performed by the terminal based on the evaluation results also includes at least one of the following: If the MCG execution conditions are met, then either the first condition switch or the second condition switch is executed. If the MCG execution conditions are met and the first timer times out, then the second condition switch is executed. The first timer is used to control the duration of the SCG execution condition evaluation. If the MCG execution conditions and the SCG execution conditions are met, then the first condition switch is executed; If the MCG execution condition is met but the SCG execution condition is not met, then the second condition switch is executed; If either the first condition switch or the second condition switch is supported, then the first condition switch will be executed. If multiple candidate PCells meet the MCG execution conditions, select the candidate PCell corresponding to the conditional reconfiguration that meets the SCG execution conditions as the target PCell, or select the candidate PCell corresponding to the conditional reconfiguration that contains the strongest candidate primary and secondary cell PSCell as the target PCell. The first conditional switch includes: performing a conditional switch to the target PCell and applying the target SCG configuration; the second conditional switch includes: performing a conditional switch to the target PCell.

4. The method according to claim 3, characterized in that, The second conditional switching also includes: if the conditional reconfiguration corresponding to the target PCell includes the target SCG configuration, then the target SCG configuration is not applied.

5. The method according to claim 3, characterized in that, When performing the second conditional switch, the method further includes: the terminal sending a conditional switch completion message, the conditional switch completion message including at least one of the following: SCG failure indication; SCG failure type information; SCG measurement results; Measurement results of at least one target PSCell.

6. The method according to any one of claims 1 to 5, characterized in that, Before the terminal evaluates the MCG execution conditions, the method further includes: the terminal receiving a condition switching message, the condition switching message including at least one target execution condition, the target execution condition including at least one of the following: The MCG execution conditions; The SCG execution conditions; The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation; SCG evaluation indication, which indicates whether to evaluate the SCG execution conditions.

7. The method according to claim 6, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: A first measurement ID, which is associated with the SCG execution condition; The second measurement ID, wherein the measurement event corresponding to the second measurement ID is considered to satisfy the SCG execution condition after it is triggered; A first measurement event, the first measurement event being applied to the source PSCell and / or the target PSCell; The second measurement event, wherein the serving cell in the second measurement event is the target PSCell; The third measurement event, wherein the neighboring cell in the third measurement event is the target PSCell; The target threshold is defined as follows: once the signal quality measurement value of the target PSCell is better than the target threshold, the SCG execution condition is considered to be met. The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation.

8. The method according to claim 6, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: In the SCG configuration of conditional RRC reconfiguration; MCG execution conditions; Conditions are being reconfigured.

9. The method according to claim 1, characterized in that, After the terminal evaluates the MCG execution conditions and the CPAC execution conditions, the method further includes at least one of the following: If a candidate PCell satisfies the MCG execution condition, and if the CPAC execution condition included in the conditional reconfiguration corresponding to the candidate PCell is not satisfied, and / or at least one conditional reconfiguration includes a CPAC configuration, then the first timer is started. During the first timer run, the MCG execution conditions and the CPAC execution conditions are continuously evaluated; If the MCG execution condition and the CPAC execution condition are both met, then the first timer is stopped; If the first timer times out, the evaluation of the MCG execution conditions and / or the CPAC execution conditions will cease. The first timer is used to control the duration of the CPAC execution condition evaluation.

10. The method according to claim 1, characterized in that, The RRC message includes the CPAC completion message.

11. The method according to claim 1, characterized in that, The method further includes: receiving a first conditional reconfiguration, wherein the first conditional reconfiguration includes an MCG execution condition and an SCG execution condition.

12. A condition switching method, characterized in that, include: The network-side device sends a condition switching message to the terminal. The condition switching message includes at least one target execution condition, and the target execution condition includes at least one of the following: SCG execution conditions; The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation; SCG evaluation instruction, wherein the SCG evaluation instruction is used to indicate whether to evaluate the SCG execution conditions; Wherein, after the network-side device sends a condition handover message to the terminal, the method further includes: the network-side device receiving a condition handover completion message sent by the terminal, the condition handover completion message including at least one of the following: SCG failure indication; SCG failure type information; SCG measurement results; Measurement results of at least one target PSCell; Measurement results of CPAC candidate cells.

13. The method according to claim 12, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: A first measurement ID, which is associated with the SCG execution condition; The second measurement ID, wherein the measurement event corresponding to the second measurement ID is considered to satisfy the SCG execution condition after it is triggered; A first measurement event, the first measurement event being applied to the source PSCell and / or the target PSCell; The second measurement event, wherein the serving cell in the second measurement event is the target PSCell; The third measurement event, wherein the neighboring cell in the third measurement event is the target PSCell; The target threshold is defined as follows: once the signal quality measurement value of the target PSCell is better than the target threshold, the SCG execution condition is considered to be met. The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation.

14. The method according to claim 12, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: In the SCG configuration of conditional RRC reconfiguration; MCG execution conditions; Conditions are being reconfigured.

15. The method according to claim 12, characterized in that, The method further includes sending a first conditional reconfiguration, wherein the first conditional reconfiguration includes an MCG execution condition and an SCG execution condition.

16. A condition switching device, characterized in that, include: The processing module is used to evaluate MCG execution conditions and at least one of the following: SCG execution conditions, CPAC execution conditions; The switching module is used to perform conditional switching based on the evaluation results; The switching module is used for at least one of the following: If the MCG execution conditions are met, then the third condition switch or the fourth condition switch is executed; If the MCG execution conditions are met and the first timer times out, then the fourth condition switch is executed. The first timer is used to control the duration of evaluating the CPAC execution conditions. If the MCG execution conditions and the CPAC execution conditions are met, then the third condition switch is executed; If the MCG execution condition is met but the CPAC execution condition is not met, then the fourth condition switch is executed; If multiple candidate PCells satisfy the MCG execution conditions, select the candidate PCell corresponding to the conditional reconfiguration that satisfies the CPAC execution conditions as the target PCell, or select the candidate PCell corresponding to the conditional reconfiguration that contains the strongest candidate PSCell as the target PCell. The third condition switching includes: performing condition switching and performing CPAC; the fourth condition switching includes: performing condition switching but not performing CPAC. The device further includes a sending module, used to send an RRC message to the target PCell when the third condition switch is performed, the RRC message indicating that the condition switch is complete; the RRC message includes relevant information about the target PCell; The sending module is further configured to send a condition switching completion message when the fourth condition switching is performed, the condition switching completion message including at least one of the following: SCG failure indication; SCG failure type information; SCG measurement results; Measurement results of CPAC candidate cells.

17. The apparatus according to claim 16, characterized in that, The processing module is also used for at least one of the following: If a candidate PCell satisfies the MCG execution condition, and if the conditional reconfiguration corresponding to the candidate PCell includes a target SCG configuration, and the SCG included in the target SCG configuration does not satisfy the SCG execution condition, and / or if at least one conditional reconfiguration includes a target SCG configuration, then the first timer is started. During the first timer run, the MCG execution conditions and the SCG execution conditions are continuously evaluated; If both the MCG execution condition and the SCG execution condition are met, then the first timer is stopped; If the first timer times out, the evaluation of the MCG execution conditions and / or the SCG execution conditions will cease. The first timer is used to control the duration of the SCG execution condition evaluation.

18. The apparatus according to claim 16, characterized in that, The switching module is also used for at least one of the following: If the MCG execution conditions are met, then either the first condition switch or the second condition switch is executed. If the MCG execution conditions are met and the first timer times out, then the second condition switch is executed. The first timer is used to control the duration of the SCG execution condition evaluation. If the MCG execution conditions and the SCG execution conditions are met, then the first condition switch is executed; If the MCG execution condition is met but the SCG execution condition is not met, then the second condition switch is executed; If either the first condition switch or the second condition switch is supported, then the first condition switch will be executed. If multiple candidate PCells satisfy the MCG execution conditions, select the candidate PCell corresponding to the conditional reconfiguration that satisfies the SCG execution conditions as the target PCell, or select the candidate PCell corresponding to the conditional reconfiguration that contains the strongest candidate PSCell as the target PCell. The first conditional switch includes: performing a conditional switch to the target PCell and applying the target SCG configuration; the second conditional switch includes: performing a conditional switch to the target PCell.

19. The apparatus according to claim 18, characterized in that, The second conditional switching also includes: if the conditional reconfiguration corresponding to the target PCell includes the target SCG configuration, then the target SCG configuration is not applied.

20. The apparatus according to claim 18, characterized in that, The apparatus further includes a sending module, configured to send a condition switching completion message when the second condition switching is performed, the condition switching completion message including at least one of the following: SCG failure indication; SCG failure type information; SCG measurement results; Measurement results of at least one target PSCell.

21. The apparatus according to any one of claims 16 to 20, characterized in that, The apparatus further includes a receiving module for receiving a condition switching message, the condition switching message including at least one target execution condition, the target execution condition including at least one of the following: The MCG execution conditions; The SCG execution conditions; The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation; SCG evaluation indication, which indicates whether to evaluate the SCG execution conditions.

22. The apparatus according to claim 21, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: A first measurement ID, which is associated with the SCG execution condition; The second measurement ID, wherein the measurement event corresponding to the second measurement ID is considered to satisfy the SCG execution condition after it is triggered; A first measurement event, the first measurement event being applied to the source PSCell and / or the target PSCell; The second measurement event, wherein the serving cell in the second measurement event is the target PSCell; The third measurement event, wherein the neighboring cell in the third measurement event is the target PSCell; The target threshold is defined as follows: once the signal quality measurement value of the target PSCell is better than the target threshold, the SCG execution condition is considered to be met. The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation.

23. The apparatus according to claim 21, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: In the SCG configuration of conditional RRC reconfiguration; MCG execution conditions; Conditions are being reconfigured.

24. The apparatus according to claim 16, characterized in that, The processing module is also used for at least one of the following: If a candidate PCell satisfies the MCG execution condition, and if the CPAC execution condition included in the conditional reconfiguration corresponding to the candidate PCell is not satisfied, and / or at least one conditional reconfiguration includes a CPAC configuration, then the first timer is started. During the first timer run, the MCG execution conditions and the CPAC execution conditions are continuously evaluated; If the MCG execution condition and the CPAC execution condition are both met, then the first timer is stopped; If the first timer times out, the evaluation of the MCG execution conditions and / or the CPAC execution conditions will cease. The first timer is used to control the duration of the CPAC execution condition evaluation.

25. The apparatus according to claim 16, characterized in that, The RRC message includes the CPAC completion message.

26. The apparatus according to claim 16, characterized in that, The device further includes a receiving module for receiving a first conditional reconfiguration, wherein the first conditional reconfiguration includes an MCG execution condition and an SCG execution condition.

27. A condition switching device, characterized in that, include: The sending module is configured to send a condition switching message to the terminal, the condition switching message including at least one target execution condition, the target execution condition including at least one of the following: SCG execution conditions; The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation; SCG evaluation instruction, wherein the SCG evaluation instruction is used to indicate whether to evaluate the SCG execution conditions; The device further includes a receiving module for receiving a condition switching completion message sent by the terminal, the condition switching completion message including at least one of the following: SCG failure indication; SCG failure type information; SCG measurement results; Measurement results of at least one target PSCell; Measurement results of CPAC candidate cells.

28. The apparatus according to claim 27, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: A first measurement ID, which is associated with the SCG execution condition; The second measurement ID, wherein the measurement event corresponding to the second measurement ID is considered to satisfy the SCG execution condition after it is triggered; A first measurement event, the first measurement event being applied to the source PSCell and / or the target PSCell; The second measurement event, wherein the serving cell in the second measurement event is the target PSCell; The third measurement event, wherein the neighboring cell in the third measurement event is the target PSCell; The target threshold is defined as follows: once the signal quality measurement value of the target PSCell is better than the target threshold, the SCG execution condition is considered to be met. The duration of the first timer, which is used to control the duration of the SCG execution condition evaluation.

29. The apparatus according to claim 27, characterized in that, The configuration related to the SCG execution conditions includes at least one of the following: In the SCG configuration of conditional RRC reconfiguration; MCG execution conditions; Conditions are being reconfigured.

30. The apparatus according to claim 27, characterized in that, The sending module is also used to send a first conditional reconfiguration, which includes an MCG execution condition and an SCG execution condition.

31. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the conditional switching method as described in any one of claims 1 to 11.

32. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the conditional switching method as described in any one of claims 12 to 15.

33. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the conditional switching method as described in any one of claims 1 to 15.

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