Switching method, apparatus, device and readable storage medium

Abstract

An embodiment of the present application provides a switching method, and provides an apparatus, a device, and a readable storage medium, the method including a step of a terminal performing switching, and a switching time of the terminal includes at least one of a sum of a primary cell (Pcell) switching time and a primary secondary cell (PSCell) addition time, a maximum value of a PCell switching time and a PSCell addition time, a PCell switching time and / or a PSCell addition time, a sum of a PCell cell search time and a PSCell cell search time, and a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on and claims priority from a Chinese patent application bearing application number 202111228027.2 and filed on October 21, 2021, the entire contents of which are hereby incorporated into this application in their entirety. [Technical Field]

[0002] TECHNICAL FIELD Embodiments of the present application relate to the field of communications technology, and in particular to a switching method, an apparatus, a device and a readable storage medium. [Background technology]

[0003] New Radio Radio (NR) Stand Alone (SA) to Multi-RAT Dual Connectivity (MR-DC) (5th Generation Mobile Communications Technology) Dual connectivity (NE-DC) of 4G radio access networks and 5G (fourth generation, 5G) NR and 4G (fourth generation, 4G) radio access networks. When converting to NR dual connectivity (EN-DC), 5G NR and 5G NR dual connectivity (NR-DC), or converting between MR-DCs (including from NE-DC to NE-DC, from EN-DC to EN-DC, and from NR-DC to NR-DC) involving a change in primary cell (PCell), the PCell is usually switched first based on the switching command, and then the primary secondary cell (Primary Cell) is switched. Secondary Cell (PSCell) addition is performed based on the PSCell addition command. This method takes time to complete the associated mode conversion.

[0004] In the related art, PCell switching and PSCell addition are performed separately. However, in the switching process including PScell addition, one radio resource control (Radio Resource Control) is used. The UE is triggered to perform PCell switching and PSCell addition by a RRC (Resource Control) message, and how to perform PCell switching and PSCell addition during the process is not specified, so the behavior of the UE is uncertain during the switching process including PSCell addition. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application provide a switching method, an apparatus, a device and a readable storage medium to solve the problem of how a terminal performs switching. [Means for solving the problem]

[0006] According to a first aspect, there is provided a switching method, the method including a step of a terminal performing switching, wherein the switching time of the terminal includes at least one of: a sum of a PCell switching time of the terminal and a PSCell addition time of the terminal; a maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal; a PCell switching time of the terminal and / or a PSCell addition time of the terminal; a sum of a PCell cell search time of the terminal and a PSCell cell search time of the terminal; and a sum of a PCell cell search time of the terminal, a PCell synchronization time of the terminal, a PSCell cell search time of the terminal, and a PSCell synchronization time.

[0007] Optionally, if a first condition is met, the switching time of the terminal includes one or more of: a sum of a PCell switching time and a PSCell addition time; a sum of a PCell cell search time and a PSCell cell search time; and a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time, wherein the first condition is that an SMTC of a target unknown PSCell is configured in the terminal.

[0008] Optionally, the method further includes the step of the terminal acquiring first information, where the first information is information indicating whether the terminal is transmitting a PRACH to a PCell. The instruction information includes one or more of: first instruction information instructing the terminal to add a PSCell after transmitting a preamble; second instruction information instructing the terminal to add a PSCell after receiving an RAR transmitted from a PCell; third instruction information instructing the terminal to add a PSCell after receiving an MSG4 transmitted from a PCell; fourth instruction information instructing the terminal to add a PSCell after transmitting an MSGA to a PCell; and fifth instruction information instructing the terminal to add a PSCell after receiving an MSGB transmitted from a PCell.

[0009] Optionally, the method further includes a step of the terminal obtaining second information, wherein the second information includes one or more of: sixth indication information indicating that the switching time of the terminal includes the sum of the PCell switching time of the terminal and the PSCell addition time of the terminal; seventh indication information indicating that the switching time of the terminal includes the maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal; eighth indication information indicating that the switching time of the terminal includes the PCell switching time of the terminal and / or the PSCell addition time of the terminal; ninth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal and the PSCell cell search time of the terminal; and tenth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal, the PCell synchronization time of the terminal, the PSCell cell search time of the terminal and the PSCell synchronization time of the terminal.

[0010] Alternatively, the length of the switching time of the terminal is a first length of time, and when the first information includes the first instruction information, the first length of time is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal transmits a preamble to a PCell, and a time length for the terminal to perform PSCell addition; Alternatively, when the first information includes the second instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives an RAR transmitted from a PCell, and the length of time during which the terminal performs PSCell addition; or when the first information includes the third instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives an MSG4 transmitted from a PCell, and the length of time during which the terminal performs PSCell addition; or when the first information includes the fourth instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal transmits an MSGA to a PCell, and the length of time during which the terminal performs PSCell addition; or when the first information includes the fifth instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives an MSGB transmitted from a PCell, and the length of time during which the terminal performs PSCell addition.

[0011] Alternatively, the time length during which the terminal performs PSCell addition includes the time length from when the terminal receives MSGB transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSGB transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives RAR transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives RAR transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives MSGA transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSGA transmitted from the PCell until when the terminal transmits MSGA to the PSCell.

[0012] Optionally, the method includes the steps of: obtaining a first threshold related to channel quality; and determining to perform PSCell addition after transmitting MSG1 to a PCell if the channel quality is equal to or greater than a first value of the first threshold; or determining to perform PSCell addition after receiving MSG2 transmitted from a PCell if the channel quality is equal to or greater than a second value of the first threshold; or determining to perform PSCell addition after receiving MSG4 transmitted from a PCell if the channel quality is equal to or greater than a third value of the first threshold; or determining to perform PSCell addition after receiving MSG2 transmitted from a PCell if the channel quality is equal to or less than the first value of the first threshold and the channel quality is equal to or greater than a second value of the first threshold. or, if the channel quality is equal to or less than a second value of the first threshold and equal to or greater than a third value of the first threshold, performing a PSCell addition after receiving MSG4 transmitted from a PCell, or, if the channel quality is equal to or greater than a fourth value of the first threshold, determining to perform a PSCell addition after transmitting MSGA to a PCell, or, if the channel quality is equal to or greater than a fifth value of the first threshold, determining to perform a PSCell addition after receiving MSGB transmitted from a PCell, or, if the channel quality is equal to or less than the fourth value of the first threshold and equal to or greater than the fifth value of the first threshold, determining to perform a PSCell addition after receiving MSGB transmitted from a PCell.

[0013] Optionally, the method further includes a step in which the terminal acquires a second threshold, the second threshold being related to channel quality, wherein if the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time; if the channel quality is equal to or greater than a second value of the second threshold, the switching time of the terminal includes a maximum value of the PCell switching time and the PSCell addition time; if the channel quality is equal to or greater than a third value of the second threshold, the switching time of the terminal includes a PCell switching time and / or a PSCell addition time; if the channel quality is equal to or greater than a fourth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time and a PScell cell search time; and if the channel quality is equal to or greater than a fifth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0014] Optionally, the method further includes the terminal transmitting third information to a network side device, wherein the third information includes whether the terminal supports PCell switching and PSCell addition in a parallel processing manner, whether the terminal supports PCell switching and PSCell addition in a serial processing manner, whether the terminal supports that the switching time includes the sum of the PCell switching time and the PSCell addition time, whether the terminal supports that the switching time includes the maximum value of the PCell switching time and the PSCell addition time, and whether the terminal supports that the switching time includes the PCell switching time and the PSCell addition time. and / or whether the terminal supports the switching time including the sum of the PCell cell search time and the PSCell cell search time; whether the terminal supports the switching time including the sum of the PCell cell search time, the PCell synchronization time, the PSCell cell search time, and the PScell synchronization time; eleventh indication information instructing the terminal to perform PSCell addition after the second operation; twelfth indication information instructing the terminal to support parallel processing of the third operation; and thirteenth indication information instructing the terminal to support serial processing of the fourth operation.

[0015] Optionally, the second operation includes one of sending MSG1 to the PCell, receiving MSG2 sent from the PCell, sending message 3 (MSG3) to the PCell, receiving MSG4 sent from the PCell, sending MSGA to the PSCell, and receiving MSGB sent from the PCell.

[0016] Optionally, the method further includes a step of receiving fourth information from a network side device, and the fourth information includes one or more of: fourteenth instruction information instructing whether the terminal will perform the switching including PSCell addition by a parallel processing method; fifteenth instruction information instructing whether the terminal will perform the switching including PSCell addition by a serial processing method; sixteenth instruction information indicating that the fifth operation will be processed in parallel; and seventeenth instruction information indicating that the sixth operation will be processed serially.

[0017] Optionally, the third operation, the fourth operation, the fifth operation, or the sixth operation includes one or more of cell detection, time domain synchronization, frequency domain synchronization, automatic gain control, and random access.

[0018] According to a second aspect, there is provided a switching method, comprising: a step of a network side device transmitting first information, wherein the first information is a step of: The instruction information includes one or more of: first instruction information instructing the terminal to add a PSCell after transmitting a preamble; second instruction information instructing the terminal to add a PSCell after receiving an RAR transmitted from a PCell; third instruction information instructing the terminal to add a PSCell after receiving an MSG4 transmitted from a PCell; fourth instruction information instructing the terminal to add a PSCell after transmitting an MSGA to a PCell; and fifth instruction information instructing the terminal to add a PSCell after receiving an MSGB transmitted from a PCell.

[0019] Optionally, the method further includes a step of the network side device transmitting second information, wherein the second information includes one or more of: sixth indication information indicating that the switching time of the terminal includes the sum of the PCell switching time of the terminal and the PSCell addition time of the terminal; seventh indication information indicating that the switching time of the terminal includes the maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal; eighth indication information indicating that the switching time of the terminal includes the PCell switching time of the terminal and / or the PSCell addition time of the terminal; ninth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal and the PSCell cell search time of the terminal; and tenth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal, the PCell synchronization time of the terminal, the PSCell cell search time of the terminal and the PSCell synchronization time of the terminal.

[0020] Alternatively, the length of the switching time of the terminal is a first length of time, and when the first information includes the first instruction information, the first length of time is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal transmits a preamble to a PCell, and a time length for the terminal to perform PSCell addition; Alternatively, when the first information includes the second instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives an RAR transmitted from a PCell, and the length of time during which the terminal performs PSCell addition; or when the first information includes the third instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives an MSG4 transmitted from a PCell, and the length of time during which the terminal performs PSCell addition; or when the first information includes the fourth instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal transmits an MSGA to a PCell, and the length of time during which the terminal performs PSCell addition; or when the first information includes the fifth instruction information, the first length of time is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives an MSGB transmitted from a PCell, and the length of time during which the terminal performs PSCell addition.

[0021] Alternatively, the time length during which the terminal performs PSCell addition includes the time length from when the terminal receives MSGB transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSGB transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives RAR transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives RAR transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives MSGA transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSGA transmitted from the PCell until when the terminal transmits MSGA to the PSCell.

[0022] Optionally, the method may further include a step of the network side device transmitting a second threshold value, the second threshold value related to channel quality, wherein if the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time, if the channel quality is equal to or greater than a second value of the second threshold, the switching time of the terminal includes a maximum value of the PCell switching time and the PSCell addition time, if the channel quality is equal to or greater than a third value of the second threshold, the switching time of the terminal includes a PCell switching time and / or a PSCell addition time, if the channel quality is equal to or greater than a fourth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time and a PSCell cell search time, and if the channel quality is equal to or greater than a fifth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0023] Optionally, the method further includes a step of the network side device receiving third information, wherein the third information includes whether the terminal supports performing PCell switching and PSCell addition in a parallel processing manner, whether the terminal supports performing PCell switching and PSCell addition in a serial processing manner, whether the terminal supports that the switching time includes the sum of the PCell switching time and the PSCell addition time, whether the terminal supports that the switching time includes the maximum value of the PCell switching time and the PSCell addition time, and whether the terminal supports that the switching time includes the PCell switching time and / or the PSCell addition time. whether the terminal supports the switching time to include a sum of a PCell cell search time and a PSCell cell search time; whether the terminal supports the switching time to include a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time; eleventh indication information instructing the terminal to perform PSCell addition after the second operation; twelfth indication information instructing the terminal to support parallel processing of the third operation; and thirteenth indication information instructing the terminal to support serial processing of the fourth operation.

[0024] Optionally, the second operation includes one of sending MSG1 to the PCell, receiving MSG2 sent from the PCell, sending MSG3 to the PCell, receiving MSG4 sent from the PCell, sending MSGA to the PSCell, and receiving MSGB sent from the PCell.

[0025] Optionally, the method further includes a step of the network side device transmitting fourth information, wherein the fourth information includes one or more of: fourteenth instruction information indicating whether the terminal will perform PSCell addition using a parallel processing method; fifteenth instruction information indicating whether the terminal will perform PSCell addition using a serial processing method; sixteenth instruction information indicating that the fifth operation will be processed in parallel; and seventeenth instruction information indicating that the sixth operation will be processed in serial.

[0026] According to a third aspect, there is provided a switching device applicable to a terminal, comprising: a switching module for performing switching, wherein a switching time of the terminal includes at least one of: a sum of a PCell switching time and a PSCell addition time; a maximum value among the PCell switching time and the PSCell addition time; a PCell switching time and / or a PSCell addition time; a sum of a PCell cell search time and a PSCell cell search time; and a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time and a PSCell synchronization time.

[0027] According to a fourth aspect, there is provided a switching apparatus adapted for use in a network side device, the switching apparatus including: a second transmitting module for transmitting first information; wherein the first information is information indicating whether the terminal transmits a PRACH (Performance Control Channel) channel to a PCell; The instruction information includes one or more of: first instruction information instructing the terminal to add a PSCell after transmitting a preamble; second instruction information instructing the terminal to add a PSCell after receiving an RAR transmitted from a PCell; third instruction information instructing the terminal to add a PSCell after receiving an MSG4 transmitted from a PCell; fourth instruction information instructing the terminal to add a PSCell after transmitting an MSGA to a PCell; and fifth instruction information instructing the terminal to add a PSCell after receiving an MSGB transmitted from a PCell.

[0028] According to a fifth aspect, there is provided a communications device comprising a processor, a memory, and a program stored in the memory and executable by the processor, wherein when the program is executed by the processor, the steps of the method according to the first or second aspect are realized.

[0029] According to a sixth aspect, there is provided a readable storage medium having a program stored thereon, the program, when executed by a processor, realizing the steps of the method according to the first or second aspect.

[0030] In the embodiments of the present application, the terminal can determine the time to add a PSCell, determine at what stage to add a PSCell, and support network scheduling, thereby clarifying the terminal's behavior during a switching process involving PSCell addition and improving system performance. [Brief explanation of the drawings]

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The drawings are used only for purposes of illustrating the preferred embodiments and are not to be considered limiting of the present application. Also, like elements are designated by like reference numerals throughout the drawings. [Figure 1] 1 is a schematic diagram of a wireless communication system to which an embodiment of the present application can be applied; [Figure 2] 1 is a flowchart of a switching method provided by an embodiment of the present application; [Figure 3] 2 is a flowchart of a switching method provided by an embodiment of the present application. [Figure 4] 1 is a schematic diagram of a switching device provided by an embodiment of the present application; [Figure 5] 2 is a schematic diagram of a switching device provided by an embodiment of the present application. [Figure 6] 1 is a schematic diagram of a terminal provided by an embodiment of the present application; [Figure 7]FIG. 1 is a schematic diagram of a network-side device provided by an embodiment of the present application; [Figure 8] 1 is a schematic diagram of a communication device provided by an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are only some of the embodiments of the present application and do not include all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0033] The term "comprises" and any variations thereof in the specification and claims of this application are intended to cover a non-exclusive inclusion, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to the explicitly recited steps or units, but may include other steps or units not explicitly recited or inherent to the process, method, product, or apparatus. Note that "and / or" as used in the specification and claims means at least one of the connected objects, e.g., A and / or B means the three cases of A alone, B alone, and both A and B.

[0034] In the examples herein, words such as "exemplary" or "for example" are used to present an example, instance, or illustration. Any embodiment or design described in the examples herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, use of words such as "exemplary" or "for example" is intended to present the relevant concept in a concrete manner.

[0035] In particular, the technology described in the embodiments of the present application is a long-term evolution (LTE) technology. LTE (LTE Evolution) / LTE Evolution (LTE-Advanced, LTE-A) systems, as well as Code Division Multiple Access (CDMA) CDMA, Time Division Multiple Access (TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access) Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access The present disclosure may also be applicable to other wireless communication systems, such as OFDMA, Single-Carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of this disclosure are often used interchangeably, and the described technology may be used for both the above systems and wireless technologies, or for other systems and wireless technologies. However, in the following description, for illustrative purposes, New Radio (NR) systems will be described, and although NR terminology will be used in much of the following description, these technologies are not intended to be used in conjunction with 6th generation (6th generation) systems. It can also be applied to applications other than NR systems, such as 6G (6th Generation) communication systems.

[0036] Referring to Figure 1, there is shown a block diagram of a wireless communication system to which the embodiments of the present application can be applied. The wireless communication system includes a terminal 11, a terminal 12, and a network side device 13. Here, the terminal is a terminal device or user equipment (UE). The terminals can be called "Devices and Equipment (UE)" and include mobile phones, tablet personal computers, laptop computers, etc. Computers or laptops, Personal Digital Assistants (PDAs), handhelds, netbooks, ultra-mobile personal computers personal computer (UMPC), Mobile Internet Device (MID), Augmented Reality The terminals 11 and 12 may be a AR / VR device, a robot, a wearable device, a vehicle-mounted equipment (VUE), a pedestrian-mounted equipment (PUE), or a smart home (a home device with wireless communication capability). Note that the specific types of the terminals 11 and 12 are not limited in the embodiments of the present application.

[0037] The network side device 13 may be a base station or a core network, where the base station may be a Node B, an evolved Node B, 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 B node, an evolved B node (gNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (TRT), a The base station may be referred to as a Radio Access Point (TRP), a Radio Access Network Node (RAN), or other appropriate term for the area. As long as the same technical effect is obtained, the base station is not limited to a specific technical term. Although the embodiments of the present application only take base stations in an NR system as examples, the specific type of base station is not limited.

[0038] In this specification, switching (HO, Hand Over) includes a switch that carries a PSCell, a switch that adds a PSCell, a switch that carries a PSCell (HO with PSCell), or a switch that adds a PSCell (HO with PSCell addition).

[0039] The PCell in this specification may be described as a primary cell or a primary node.

[0040] A PSCell in this specification may also be described as a primary secondary cell, or a secondary node.

[0041] The application scenario of the present application includes at least one of the following (1) to (6). (1)NR Switching from SA to NE-DC (2)NR Switching from SA to EN-DC (3)NR Switching from SA to NR-DC (4) Switching from NE-DC to NE-DC (5) Switching from EN-DC to EN-DC (6) Switching from NR-DC to NR-DC

[0042] The switching time in this specification may be described as a switching delay (HO delay) or an interruption time including the interruption time due to the switching. Specifically, the switching time is the time when the terminal is in a radio resource control (RRC) mode including the switching. The time period includes the time from when the UE receives a RRC (Resource Control) message to when the UE transmits a new PRACH. Furthermore, transmitting the new PRACH includes transmitting the PRACH to a new PCell and / or transmitting the PRACH to a new PSCell.

[0043] Furthermore, the switching time of the terminal can be understood as the time within which the terminal is ready to transmit a new PRACH.

[0044] Referring to FIG. 2, an embodiment of the present application provides a switching method, where the execution body of the method can be a terminal, and the specific steps include step 201.

[0045] In step 201, a terminal performs switching, and the switching time of the terminal includes at least one of the following (1) to (5):

[0046] (1) The sum of the PCell switching time of the terminal and the PSCell addition time of the terminal The UE switching time includes "PCell switching time + PSCell addition time", in which case the UE completes PCell switching and PSCell addition serially, and includes the following cases: In Case 1, PCell switching and PSCell addition are performed completely serially, i.e., PSCell addition is performed after PCell switching is completed (specifically, after PRACH transmission to the PCell is completed, i.e., after MSG4 or MSB is received). In Case 2, the PRACH process of the PCell and the PScell addition partially overlap in the time domain, including initiating the PScell addition after transmitting a PRACH preamble (or written as MSG1) to the PCell, or initiating the PScell addition after receiving an RAR (MSG2) transmitted from the PCell, or initiating the PScell addition after transmitting an MSGA to the PCell.

[0047] (2) The maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal The above-mentioned terminal switching time includes "the maximum value of the PCell switching time and the PSCell addition time." In this case, it can also be understood that the terminal completes PCell switching and PSCell addition in parallel, i.e., the two are performed separately, and the delay of PSCell switching includes the maximum delay of both, and by transmitting a PRACH to the PCell and a PRACH to the PSCell, the time when the PRACH is transmitted latest out of the two is used as a flag to indicate the end of PSCell switching.

[0048] (3) PCell switching time of the terminal and / or PSCell addition time of the terminal The above-mentioned terminal switching time includes "PCell switching time and / or PSCell addition time." In this case, the terminal completes PCell switching and PSCell addition in parallel, and these two operations are performed completely independently. There is no need to specify a flag for the completion of PSCell switching. In this case, Handover The switching time with PSCell may be described as PCell switching time and PSCell addition time, that is, the time for PCell switching and PSCell addition are described, respectively. It does not have to embody the overall time of with PSCell.

[0049] (4) The sum of the time for PCell cell search of the terminal and the time for PSCell cell search of the terminal. The above UE switching time includes "PCell cell selection time + PSCell cell selection time", in which case the UE completes PCell switching and PSCell addition partially serially or partially in parallel. Specifically, this proposal means that PCell cell search and PSCell cell search are performed serially, and other processes such as time synchronization, frequency domain synchronization, and PRACH transmission are performed in parallel, i.e., independently.

[0050] (5) The sum of the PCell cell search time, PCell synchronization time, PSCell cell search time, and PSCell synchronization time. The above UE switching time includes "PCell cell selection time + PCell synchronization time + PSCell cell selection time + PSCell synchronization time", in which case the UE completes PCell switching and PSCell addition partially serially or partially in parallel. Specifically, this proposal means that PCell cell search and synchronization and PSCell cell search and synchronization are performed serially, and other processes including PRACH transmission are performed in parallel, i.e., independently of each other.

[0051] In addition, in the above schemes (1) to (5), the terminal switching time in each scheme may further include the RRC processing time.

[0052] In an embodiment of the present application, when a first condition is satisfied, the switching time of the terminal includes one or more of a PCell switching time and a PSCell addition time, a PCell cell search time and a PSCell cell search time, a PCell cell search time, a PCell synchronization time, a PSCell cell search time and a PSCell synchronization time, and the first condition is that an SMTC of a target unknown PSCell is configured in the terminal. That is, a target PSCell is unknown and an SMTC of the target PSCell is configured. Here, the SMTC of the target PSCell being configured can be understood as an SMTC being configured in the target PSCell, that is, an SMTC of the target PSCell is configured in the terminal.

[0053] Here, optionally, the SMTC of the PSCell with an unknown target being configured in the terminal includes the SMTC of the PSCell with an unknown target being configured in targetcellSMTC-SCG-r16 but not in reconfigurationWithSync, or the SMTC of the PSCell with an unknown target being configured in RRCConnectionReconfiguration.

[0054] In one embodiment of the present application, the method further includes a step of the terminal obtaining first information, wherein the first information includes: (1) The terminal transmits a physical random access channel (PRACH) to the PCell. First indication information instructing to perform PSCell addition after transmitting a Random Access Channel (PRACH) (e.g., a primary node PRACH) preamble; (2) The terminal receives a random access response (Random Access Response) transmitted from the primary cell (PCell). Second instruction information instructing to perform PSCell addition after receiving an Access Response (RAR); (3) third indication information instructing the terminal to perform PSCell addition after receiving message 4 (MSG4) transmitted from the PCell; and (4) fourth instruction information instructing the terminal to add a PSCell after transmitting message A (MSGA) to the PCell; and (5) The terminal receives message B( and fifth indication information instructing to perform PSCell addition after receiving the PSCell addition instruction (MSGB).

[0055] In one embodiment of the present application, the method further comprises obtaining second information, the second information comprising: (1) sixth indication information indicating that a switching time of the terminal includes a sum of a PCell switching time of the terminal and a PSCell addition time of the terminal; (2) seventh indication information indicating that the switching time of the terminal includes a maximum value among the PCell switching time of the terminal and the PSCell addition time of the terminal; and (3) eighth indication information indicating that the switching time of the terminal includes a PCell switching time of the terminal and / or a PSCell addition time of the terminal; and (4) ninth indication information indicating that the switching time of the terminal includes a sum of a PCell cell search time of the terminal and a PSCell cell search time of the terminal; and (5) Tenth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal, the PCell synchronization time of the terminal, the PSCell cell search time of the terminal, and the PSCell synchronization time of the terminal.

[0056] In one embodiment of the present application, the length of the switching time of the terminal is a first length of time, and when the first information includes the first indication information, the first length of time (T1) is determined based on the radio resource control (Radio Resource Control) information included in the switching. Alternatively, when the first information includes the second indication information, the first time length (T2) is the sum of the time length from when the terminal receives an RRC message including switching until the terminal transmits a preamble to a PCell and the time length for the terminal to perform PSCell addition. or, if the first information includes the third instruction information, the first length of time (T3) is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives MSG4 transmitted from a PCell, and the length of time for the terminal to perform PSCell addition; or, if the first information includes the fourth instruction information, the first length of time (T4) is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal transmits MSGA to a PCell, and the length of time for the terminal to perform PSCell addition; or, if the first information includes the fifth instruction information, the first length of time (T5) is the sum of the length of time from when the terminal receives an RRC message including switching until when the terminal receives MSGB transmitted from a PCell, and the length of time for the terminal to perform PSCell addition.

[0057] In one embodiment of the present application, the time length during which the terminal performs PSCell addition includes the time length from when the terminal receives an MSGB transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSGB transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an RAR transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an RAR transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an MSG4 transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSG4 transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an MSGA transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSGA transmitted from a PCell until when the terminal transmits an MSGA to the PSCell.

[0058] In one embodiment of the present application, the method includes the steps of: a terminal obtaining a first threshold value, the first threshold value being related to a channel quality; and, if the channel quality is equal to or greater than a first value of the first threshold value, the terminal transmitting a message 1 to a PCell. a step of determining to perform PSCell addition after the terminal receives message 2 (MSG2) transmitted from a PCell when the channel quality is equal to or greater than a second value of the first threshold, or a step of determining to perform PSCell addition after the terminal receives MSG4 transmitted from a PCell when the channel quality is equal to or greater than a third value of the first threshold, or a step of determining to perform PSCell addition after the terminal receives MSG2 transmitted from a PCell when the channel quality is equal to or less than a first value of the first threshold and the channel quality is equal to or greater than a second value of the first threshold. or, if the channel quality is equal to or less than a second value of the first threshold and equal to or greater than a third value of the first threshold, determining to perform PSCell addition after the terminal receives MSG4 transmitted from a PCell, or, if the channel quality is equal to or greater than a fourth value of the first threshold, determining to perform PSCell addition after the terminal transmits MSGA to a PCell, or, if the channel quality is equal to or greater than a fifth value of the first threshold, determining to perform PSCell addition after the terminal receives MSGB transmitted from a PCell, or The method further includes a step in which, if the channel quality is less than or equal to a fourth value of the first threshold and the channel quality is greater than or equal to a fifth value of the first threshold, the terminal determines to perform PSCell addition after receiving an MSGB transmitted from a PCell.

[0059] Optionally, the first threshold is a reference signal received power (Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Signal to Interference and Noise Ratio (SIR) The channel quality includes at least one of RSRP, RSRQ, and SINR, and the channel quality is obtained by measuring it at the terminal.

[0060] In one embodiment of the present application, the method further includes a step in which the terminal acquires a second threshold, the second threshold being related to channel quality, wherein if the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time, if the channel quality is equal to or greater than a second value of the second threshold, the switching time of the terminal includes a maximum value of the PCell switching time and the PSCell addition time, if the channel quality is equal to or greater than a third value of the second threshold, the switching time of the terminal includes a PCell switching time and / or a PSCell addition time, if the channel quality is equal to or greater than a fourth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time and a PScell cell search time, and if the channel quality is equal to or greater than a fifth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0061] Optionally, the second threshold includes at least one of RSRP, RSRQ, and SINR. The channel quality includes at least one of RSRP, RSRQ, and SINR, and the channel quality is obtained by measuring it by the terminal.

[0062] In one embodiment of the present application, the method further includes a step in which the terminal transmits third information to the network side, where the third information includes one or more of the following (1) to (10):

[0063] (1) Whether the terminal supports PCell switching and PSCell addition using a parallel processing method. Here, the switching that includes adding PSCells depending on the parallel processing method (HO Performing PCell switching and PSCell addition (with PSCell) means that the UE performs PCell switching and PSCell addition simultaneously. In this case, the time length until switching including PSCell addition is completed is the maximum value of the PCell switching delay and the PSCell addition delay (max(PCell switching delay, PSCell addition delay)).

[0064] (2) Whether the terminal supports PCell switching and PSCell addition through serial processing. Here, the switching that includes adding a PSCell depending on the serial processing method (HO Performing PCell switching (with PSCell) means that the UE performs PCell switching and PSCell addition serially, and performs PSCell addition after completing PCell switching or after completing most of the PCell switching process. In this case, the time length until switching including PSCell addition is completed is longer than the time in the parallel method, specifically, PCell switching delay + PSCell addition delay + T (where T is related to the stage of PCellPRACH at which the UE performs PSCell addition).

[0065] (3) Whether the terminal supports a switching time that includes the sum of a PCell switching time and a PSCell addition time

[0066] (4) Whether the terminal supports a switching time that includes the maximum value of the PCell switching time and the PSCell addition time.

[0067] (5) Whether the terminal supports the switching time including the PCell switching time and / or the PSCell addition time

[0068] (6) Whether the terminal supports a switching time including the sum of a PCell cell search time and a PSCell cell search time.

[0069] (7) Whether the terminal supports a switching time including the sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0070] (8) Eleventh instruction information instructing to add a PSCell after the second operation That is, the eleventh instruction information reports the specific stage at which the PSCell addition will be performed.

[0071] (9) twelfth indication information indicating that the terminal supports parallel processing of the third operation; That is, the 12th instruction information reports which parts of the parallel processing are supported.

[0072] (10) thirteenth indication information indicating that the terminal supports serial processing of the fourth operation; That is, the thirteenth instruction information reports which part of the serial processing is supported.

[0073] In addition, the network side can send the first information to the terminal based on the third information, that is, the network side can instruct the terminal when to perform PSCell addition based on the capabilities reported by the terminal or the actual needs of the terminal.

[0074] Optionally, the second operation comprises: (1) Transmitting MSG1 to the PCell; (2) MSG2 transmitted from the PCell has been received, and (3) sending message 3 (MSG3) to the PCell; (4) MSG4 transmitted from the PCell has been received, and (5) Sending MSGA to the PSCell; (6) MSGB transmitted from the PCell has been received.

[0075] In one embodiment of the present application, the method further includes a step of determining, by the terminal, a first scheme representing a scheme in which the terminal performs switching including a PSCell addition.

[0076] In one embodiment of the present application, the step of the terminal determining the first scheme includes a step of the terminal receiving fourth information from the network side, and a step of the terminal determining the first scheme based on the fourth information (i.e., the terminal obtains how to perform switching including PSCell addition based on a network instruction), or a step of the terminal determining the first scheme based on a protocol specification (i.e., the terminal obtains how to perform switching including PSCell addition through a protocol specification).

[0077] In one embodiment of the present application, the fourth information includes one or more of the following (1) to (4).

[0078] (1) 14th instruction information instructing whether the terminal adds a PSCell by a parallel processing method.

[0079] (2) 15th instruction information instructing whether the terminal performs PSCell addition by a serial processing method.

[0080] (3) A sixteenth instruction indicating that the fifth operation is to be processed in parallel. That is, the 16th instruction information further instructs the terminal at what stage to perform parallel processing.

[0081] (4) A seventeenth instruction indicating that the sixth operation is to be processed serially. That is, the seventeenth instruction information further instructs the terminal at what stage to perform serial processing.

[0082] In one embodiment of the present application, the protocol conventions include predefined rules, which include adopting a serial processing method if the network side configures a synchronization signal block-based measurement time setting (SMTC) in the target PSCell, and adopting a parallel processing method if the network side does not configure a synchronization signal block-based measurement time setting (SMTC) in the target PSCell (i.e., if the above conditions are not met).

[0083] In one embodiment of the present application, the third operation, the fourth operation, the fifth operation, or the sixth operation includes one or more of the following (1) to (5).

[0084] (1) Cell detection That is, parallel or serial processing can be performed in cell detection.

[0085] (2) Time domain synchronization That is, parallel or serial processing can be performed in time domain synchronization.

[0086] (3) Frequency domain synchronization That is, parallel or serial processing can be performed in frequency domain synchronization.

[0087] (4) Automatic gain control gain control (AGC) That is, parallel processing or serial processing can be performed in automatic gain control.

[0088] (5) Random Access That is, parallel processing or serial processing can be performed in random access.

[0089] The cell search includes at least one of AGC and cell detection. The cell detection includes PSS / SSS detection, i.e., Primary Synchronization (PSS / SSS) detection. This may also be described as Signal / Secondary Synchronization Signal detection.

[0090] Hereinafter, the embodiments of the present application will be introduced in combination with specific examples.

[0091] The terminal receives first information transmitted from the network, and the first information indicates when the terminal performs PSCell addition.

[0092] (1) Optionally, the first information may include first instruction information, which instructs the terminal to perform PSCell addition after transmitting a PRACH preamble to the PCell (i.e., after transmitting message 1 (MSG1) to the PCell).

[0093] Based on the instruction of the first instruction information, the terminal performs switching including PSCell addition (HO The time length until the completion of the PSCell (with PSCell) is T1.

[0094] T1=Switching (HO with PSCell) to the time the UE transmits a preamble to the PCell + the time length for the UE to add a PSCell.

[0095] Here, the time length during which the terminal adds a PSCell can be understood as the time from when the terminal transmits a preamble to the PCell to when the terminal transmits a preamble to the PSCell, or the time from when the terminal transmits a preamble to the PCell to when the terminal transmits a message A (MSGA) to the PSCell.

[0096] However, MN Since random access of the PCell has not yet been completed, adding a PSCell at this stage may result in a risk of PCell switching failing, which may result in a certain amount of resource waste.

[0097] (2) Optionally, the first information may include second instruction information, and the second instruction information instructs the terminal to initiate PSCell addition after receiving the RAR transmitted from the PCell (i.e., receiving message 2 (MSG2)).

[0098] Based on the instruction of the second instruction information, the terminal The time length until the completion of the PSCell (with PSCell) is T2.

[0099] T2=Switching (HO with PSCell) until the UE receives an RRC message containing the RAR transmitted from the PCell + the time length for the UE to add a PSCell.

[0100] Here, the time length during which the terminal adds a PSCell can be understood as the time from when the terminal receives an RAR transmitted from the PCell until when the terminal transmits a Pramble to the PSCell, or the time from when the terminal receives an RAR transmitted from the PCell until when the terminal transmits an MSGA to the PSCell.

[0101] T2 is longer than T1, and the increased time of T2 is the time it takes for the UE to receive the RAR transmitted from the PCell. Since random access of the PCell has not yet been completed, performing a PScell at this stage can improve robustness to a certain extent compared to the proposal of an instruction using the first instruction information, but there is still a risk of PCell switching failing, which may result in a certain amount of wasted resources.

[0102] (3) Optionally, the first information may include third instruction information, and the third instruction information instructs the terminal to perform PSCell addition after receiving message 4 (MSG4) transmitted from the PCell.

[0103] Based on the instruction of the third instruction information, the terminal performs switching including PSCell addition (HO The time length until the completion of the PSCell (with PSCell) is T3.

[0104] T3=Switch (HO with PSCell) until the UE receives MSG4 transmitted from the PCell + the time length for the UE to add a PSCell.

[0105] Here, the time length during which the terminal adds a PSCell can be understood as the time from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits a Pramble to the PSCell, or the time from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits MSGA to the PSCell.

[0106] T3 is longer than T1 and T2, and the time when T3 increases compared to T1 is the time when the terminal receives the RAR transmitted from the PCell, the time when the terminal transmits MSG3, and the time when the terminal receives MSG4. However, when the terminal instructed based on the third instruction information resumes PSCell addition, MN It can be determined that the PCell switching has been successful, which can improve the robustness of the system.

[0107] Furthermore, considering a two-step RACH, the first information may include fourth indication information, and the fourth indication information instructs the terminal to perform PSCell addition after transmitting MSGA to the PCell.

[0108] Based on the instruction of the fourth instruction information, the terminal The time length until the completion of the PSCell (with PSCell) is T4.

[0109] T4=Switch (HO with PSCell) to the time the UE sends MSGA to the PCell + the time length for the UE to add a PSCell.

[0110] Here, the time length during which the terminal adds a PSCell can be understood as the time from when the terminal transmits an MSGA to the PCell to when the terminal transmits a Pramble to the PSCell, or the time from when the terminal transmits an MSGA to the PCell to when the terminal transmits an MSGA to the PSCell.

[0111] However, MN Since random access of the PCell has not yet been completed, adding a PSCell at this stage may result in a risk of PCell switching failing, which may result in a certain amount of resource waste.

[0112] Furthermore, considering a two-step RACH, the first information may include fifth indication information, and the fifth indication information instructs the terminal to perform PSCell addition after receiving the MSGB transmitted from the PCell.

[0113] Based on the instruction of the fifth instruction information, the terminal The time length until the PSCell is completed is T5.

[0114] T5=Switch (HO with PSCell) until the UE receives MSGB transmitted from the PCell + the time length for the UE to add a PSCell.

[0115] Here, the time length during which the terminal adds a PSCell can be understood as the time from when the terminal receives the MSGB transmitted from the PCell until when the terminal transmits a Pramble to the PSCell, or the time from when the terminal receives the MSGB transmitted from the PCell until when the terminal transmits an MSGA to the PSCell.

[0116] T5 is longer than T4, and the time T5 increases compared to T4 is the time it takes for the UE to receive the MSGB transmitted from the PCell. Since random access of the PCell has not yet been completed, adding a PScell at this stage can improve robustness to a certain extent compared to the proposal of an instruction using the first instruction information, but there is still a risk of PCell switching failing, which may result in a certain amount of wasted resources.

[0117] The introduction of the first information above is mainly due to the consideration that the PRACH is divided into a four-step RACH and a two-step RACH.

[0118] Taking the 4-step RACH as an example, the random access process includes MSG1, MSG2, MSG3, and MSG4. After receiving the RRC message for "Add PSCell with PSCell", it is necessary to decide whether to add the PSCell before or after the PRACH for PCell switching is completed.

[0119] If PSCell addition is performed before the completion of PRACH, it is necessary to decide whether to perform it at MSG1, MSG2, MSG3, or MSG4 stage. The earlier the PSCell addition is performed, the shorter the delay for completing switching including PSCell addition, the shorter the scheduling limit, and the faster dual connection mode can be entered. However, if PSCell addition is performed before the completion of PRACH for PCell switching, random access for PCell switching may fail. If random access for PCell switching fails, PSCell addition started early will also result in a certain amount of wasted resources.

[0120] A similar problem exists in the two-step RACH, that is, it is necessary to decide whether to add a PSCell before or after the PRACH of PCell switching is completed, and if the PSCell is added before the PRACH is completed, it is necessary to decide at which stage, MSGA or MSGB, to add the PSCell.

[0121] To address the above issue, the network can instruct the terminal at what stage to add a PSCell. If the network expects the terminal to quickly enter dual connectivity mode, the network can instruct the terminal to add a PSCell early, in which case it must bear a certain risk of switching failure.

[0122] If the network wants to avoid wasting resources and increase the robustness of dual connection establishment, and at the same time there is no urgent need to enter dual connection, the network can instruct the terminal to add a PSCell at a later stage of the PRACH process of PCell switching.

[0123] Furthermore, the terminal receives a first threshold value transmitted from the network, the first threshold value being associated with a channel quality, the channel quality including, but not limited to, RSRP and / or RSRQ and / or SINR. The first threshold value may have various values.

[0124] If the channel quality of the terminal satisfies the first threshold, the terminal can determine when to perform PSCell addition.

[0125] Alternatively, if the channel quality is equal to or greater than a first value of the first threshold, the terminal may perform PSCell addition after transmitting MSG1 to the PCell; if the channel quality is equal to or greater than a second value of the first threshold, the terminal may perform PSCell addition after receiving MSG2 transmitted from the PCell; and if the channel quality is equal to or greater than a third value of the first threshold, the terminal may perform PSCell addition after receiving MSG4 transmitted from the PCell.

[0126] Any combination of the above three threshold values may be used.

[0127] For example, if the channel quality is equal to or greater than a first value of the first threshold, the terminal can perform PSCell addition after transmitting MSG1 to the PCell; if the channel quality is equal to or less than the first value of the first threshold but equal to or greater than a second value of the first threshold, the terminal can perform PSCell addition after receiving MSG2 transmitted from the PCell; and if the channel quality is equal to or less than the second value of the first threshold but equal to or greater than a third value of the first threshold, the terminal can perform PSCell addition after receiving MSG4 transmitted from the PCell.

[0128] Alternatively, if the channel quality is equal to or greater than the fourth value of the first threshold, the terminal may add a PSCell after transmitting an MSGA to the PCell, and if the channel quality is equal to or greater than the fifth value of the first threshold, the terminal may add a PSCell after receiving an MSGB transmitted from the PCell.

[0129] The above two threshold values may also be used in any combination. For example, when the channel quality is equal to or greater than the fourth value of the first threshold, the terminal may add a PSCell after transmitting an MSGA to the PCell, and when the channel quality is equal to or less than the fourth value of the first threshold but equal to or greater than the fifth value of the first threshold, the terminal may add a PSCell after receiving an MSGB transmitted from the PCell.

[0130] Furthermore, considering the difference in the specific implementation of the terminal, the terminal: (1) The terminal is switched to a parallel system that includes the addition of a PSCell (HO with PSCell) and (2) The device serial Whether or not the method supports switching that includes adding a PSCell, The capability information of one or more of the above may be reported to the network.

[0131] Here, performing switching including PSCell addition using the so-called parallel method means that the terminal performs PCell switching and PSCell addition simultaneously. In this case, the time length until switching including PSCell addition is completed is max(PCell switching delay, PSCell addition delay).

[0132] Performing switching including PSCell addition using the so-called serial method means that the UE performs PCell switching and PSCell addition serially, and then performs PSCell addition after PCell switching is completed or after most of the PCell switching process is completed. In this case, the time length until switching including PSCell addition is completed is longer than the time required using the parallel method, and specifically, is PCell switching delay + PSCell addition delay + T (where T is related to at what stage of PCellPRACH the UE performs PSCell addition).

[0133] For the serial method, specifically, the terminal can also report at what stage the PSCell is added, including adding a PSCell after MSG1, adding a PSCell after MSG2, adding a PSCell after MSG3, adding a PSCell after MSGA, and adding a PSCell after MSGB.

[0134] Regarding the parallel method, there is also a partial parallel method, and the terminal can report which parts of parallel processing it supports, such as whether cell detection can be processed in parallel (i.e., whether PCell cell detection and PSCell cell detection can be performed simultaneously), and / or whether time domain / frequency domain synchronization can be processed in parallel (i.e., whether time domain / frequency domain synchronization of the PCell cell and time domain / frequency domain synchronization of the PSCell cell can be performed simultaneously), and / or whether automatic gain control (Automatic This includes whether the AGC (Automated Gain Control) can be processed in parallel (i.e., whether the PCell cell AGC and the PSCell cell AGC can be performed simultaneously), and / or whether random access can be processed in parallel (i.e., whether the PRACH of the PCell cell and the PRACH of the PSCell cell can be performed simultaneously).

[0135] Regarding the serial method, there is also a partial serial method, and the terminal can report which parts of serial processing it supports, including whether serial processing is required for cell detection (i.e., whether PCell cell detection and PSCell cell detection can be performed serially), and / or whether serial processing is required for time domain / frequency domain synchronization (i.e., whether PCell cell time domain / frequency domain synchronization and PSCell cell time domain / frequency domain synchronization can be performed serially), and / or whether serial processing is required for AGC (i.e., whether PCell cell AGC and PSCell cell AGC can be performed serially), and / or whether serial processing is required for random access (i.e., whether PCell cell PRACH and PSCell cell PRACH can be performed serially).

[0136] Furthermore, the terminal can acquire how to perform switching involving the PScell. The terminal's acquisition method includes acquiring network instruction information (fourth information) or a rule predefined by a protocol.

[0137] The above-mentioned fourth information includes indicating whether the terminal will perform switching including PSCell addition in a parallel manner and / or indicating whether the terminal will perform switching including PSCell addition in a serial manner.

[0138] Furthermore, for the parallel method, it is also possible to further instruct at what stage the terminal performs parallel processing, (1) Parallel processing for cell detection; (2) Parallel processing with time domain / frequency domain synchronization; (3) Parallel processing with AGC (4) Performing parallel processing with random access.

[0139] Furthermore, regarding the serial method, it is also possible to further instruct at what stage the terminal performs serial processing, (1) Serial processing for cell detection; (2) Serial processing with time domain / frequency domain synchronization; (3) Serial processing is performed by AGC. (4) performing serial processing with random access.

[0140] The protocol predefined rules allow the network to configure SSB-based RRM measurement time for the target PSCell. This includes adopting the serial method when the RRM Measurement Timing Configuration (SMTC) (which can be set by the target cell SMTC-SCG) is set, and adopting the parallel method when the above conditions are not met.

[0141] In the prior art, PCell switching and PSCell addition are performed separately. However, during a switching process involving PSCell addition, a single RRC message triggers the UE to perform PCell switching and PSCell addition, and how to perform PCell switching and PSCell addition during the process is not specified. This makes the UE's behavior during the switching process involving PSCell addition uncertain, and the time required to complete the switching process involving PSCell addition uncertain, which affects the network schedule. In an embodiment of the present application, the UE can determine the time to perform PSCell addition, determine at what stage to perform PSCell addition, and support the network schedule, thereby clarifying the UE's behavior during a switching process involving PSCell addition and improving system performance.

[0142] Referring to FIG. 3, an embodiment of the present application provides a switching method, and specific steps include step 301.

[0143] In step 301, a network side device transmits first information, where the first information is a PRACH (Predictive Control Channel) channel information (PCell) transmitted by the terminal. The instruction information includes one or more of: first instruction information instructing the terminal to add a PSCell after transmitting a preamble; second instruction information instructing the terminal to add a PSCell after receiving an RAR transmitted from a PCell; third instruction information instructing the terminal to add a PSCell after receiving an MSG4 transmitted from a PCell; fourth instruction information instructing the terminal to add a PSCell after transmitting an MSGA to a PCell; and fifth instruction information instructing the terminal to add a PSCell after receiving an MSGB transmitted from a PCell.

[0144] In an embodiment of the present application, the method further includes a step of a network side device transmitting second information, wherein the second information includes one or more of: sixth indication information indicating that the switching time of the terminal includes the sum of the PCell switching time of the terminal and the PSCell addition time of the terminal; seventh indication information indicating that the switching time of the terminal includes the maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal; eighth indication information indicating that the switching time of the terminal includes the PCell switching time of the terminal and / or the PSCell addition time of the terminal; ninth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal and the PSCell cell search time of the terminal; and tenth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal, the PCell synchronization time of the terminal, the PSCell cell search time of the terminal, and the PSCell synchronization time of the terminal.

[0145] In one embodiment of the present application, the length of switching time of the terminal is a first length of time, and when the first information includes the first instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal transmits a preamble to a PCell, and a length of time for the terminal to perform PSCell addition; or when the first information includes the second instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal receives an RAR transmitted from a PCell, and a length of time for the terminal to perform PSCell addition; or when the first information includes the third instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal receives an RAR transmitted from a PCell, and a length of time for the terminal to perform PSCell addition. or, if the first information includes the fourth instruction information, the first time length is the sum of the time length from when the terminal receives an RRC message including the switching until when the terminal receives MSG4 transmitted from the PCell, and the time length for the terminal to add a PSCell; or, if the first information includes the fifth instruction information, the first time length is the sum of the time length from when the terminal receives an RRC message including the switching until when the terminal receives MSGB transmitted from the PCell, and the time length for the terminal to add a PSCell.

[0146] In one embodiment of the present application, the time length during which the terminal performs PSCell addition includes the time length from when the terminal receives an MSGB transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSGB transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an RAR transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an RAR transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an MSG4 transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSG4 transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an MSGA transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSGA transmitted from a PCell until when the terminal transmits an MSGA to the PSCell.

[0147] In one embodiment of the present application, the method further includes a step in which a network side device transmits a second threshold value, the second threshold value being related to channel quality, wherein if the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time, if the channel quality is equal to or greater than a second value of the second threshold, a switching time of the terminal includes a maximum value of the PCell switching time and the PSCell addition time, if the channel quality is equal to or greater than a third value of the second threshold, a switching time of the terminal includes a PCell switching time and / or a PSCell addition time, if the channel quality is equal to or greater than a fourth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time and a PScell cell search time, and if the channel quality is equal to or greater than a fifth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0148] In an embodiment of the present application, the method further includes a step of a network side device receiving third information, wherein the third information includes whether the terminal supports performing PCell switching and PSCell addition in a parallel processing manner, whether the terminal supports performing PCell switching and PSCell addition in a serial processing manner, whether the terminal supports that the switching time includes the sum of the PCell switching time and the PSCell addition time, whether the terminal supports that the switching time includes the maximum value of the PCell switching time and the PSCell addition time, and whether the terminal supports that the switching time includes the PCell switching time and / or the PSCell addition time. or whether the terminal supports the switching time to include a sum of a PCell cell search time and a PSCell cell search time; whether the terminal supports the switching time to include a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PScell synchronization time; eleventh indication information instructing the terminal to perform PSCell addition after the second operation; twelfth indication information instructing the terminal to support parallel processing of the third operation; and thirteenth indication information instructing the terminal to support serial processing of the fourth operation.

[0149] In one embodiment of the present application, the second operation comprises transmitting MSG1 to a PCell; Includes one of receiving MSG2 transmitted from the PCell, transmitting MSG3 to the PCell, receiving MSG4 transmitted from the PCell, transmitting MSGA to the PSCell, and receiving MSGB transmitted from the PCell.

[0150] In one embodiment of the present application, the method further includes a step of the network side device transmitting fourth information, wherein the fourth information includes one or more of: fourteenth instruction information indicating whether the terminal will perform PSCell addition using a parallel processing method; fifteenth instruction information indicating whether the terminal will perform PSCell addition using a serial processing method; sixteenth instruction information indicating that the fifth operation will be processed in parallel; and seventeenth instruction information indicating that the sixth operation will be processed in serial.

[0151] For the same contents of the network-side method embodiment as those of the terminal-side method embodiment, the explanation of the terminal-side method embodiment shown in FIG. 2 can be referred to.

[0152] In an embodiment of the present application, the network side can instruct the terminal when to add a PSCell or at what stage to add a PSCell, thereby clarifying the terminal's operation during a switching process that includes PSCell addition and improving system performance.

[0153] Referring to FIG. 4, an embodiment of the present application provides a switching device applied to a terminal, the device 400 including a switching module 401 for performing switching, and a switching time of the terminal including at least one of: a sum of a PCell switching time and a PSCell addition time; a maximum value among the PCell switching time and the PSCell addition time; a PCell switching time and / or a PSCell addition time; a sum of a PCell cell search time and a PSCell cell search time; and a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time and a PSCell synchronization time.

[0154] In one embodiment of the present application, when a first condition is met, the switching time of the terminal includes one or more of a PCell switching time and a PSCell addition time, a PCell cell search time and a PSCell cell search time, a PCell cell search time, a PCell synchronization time, a PSCell cell search time and a PSCell synchronization time, and the first condition is that an SMTC of a target unknown PSCell is configured in the terminal.

[0155] In one embodiment of the present application, the device further includes a first acquiring module for acquiring first information, where the first information is information indicating whether the terminal transmits a PRACH (Performance Control Channel) signal to a PCell. The instruction information includes one or more of: first instruction information instructing the terminal to add a PSCell after transmitting a preamble; second instruction information instructing the terminal to add a PSCell after receiving an RAR transmitted from a PCell; third instruction information instructing the terminal to add a PSCell after receiving an MSG4 transmitted from a PCell; fourth instruction information instructing the terminal to add a PSCell after transmitting a message A (MSGA) to a PCell; and fifth instruction information instructing the terminal to add a PSCell after receiving an MSGB transmitted from a PCell.

[0156] In an embodiment of the present application, the device further includes a second acquisition module for acquiring second information, wherein the second information includes one or more of: sixth indication information indicating that the switching time of the terminal includes the sum of the PCell switching time of the terminal and the PSCell addition time of the terminal; seventh indication information indicating that the switching time of the terminal includes the maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal; eighth indication information indicating that the switching time of the terminal includes the PCell switching time of the terminal and / or the PSCell addition time of the terminal; ninth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal and the PSCell cell search time of the terminal; and tenth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal, the PCell synchronization time of the terminal, the PSCell cell search time of the terminal, and the PSCell synchronization time of the terminal.

[0157] In one embodiment of the present application, the length of switching time of the terminal is a first length of time, and when the first information includes the first instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal transmits a preamble to a PCell, and a length of time for the terminal to perform PSCell addition; or when the first information includes the second instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal receives an RAR transmitted from a PCell, and a length of time for the terminal to perform PSCell addition; or when the first information includes the third instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal receives an RAR transmitted from a PCell, and a length of time for the terminal to perform PSCell addition. or, if the first information includes the fourth instruction information, the first time length is the sum of the time length from when the terminal receives an RRC message including the switching until when the terminal receives MSG4 transmitted from the PCell, and the time length for the terminal to add a PSCell; or, if the first information includes the fifth instruction information, the first time length is the sum of the time length from when the terminal receives an RRC message including the switching until when the terminal receives MSGB transmitted from the PCell, and the time length for the terminal to add a PSCell.

[0158] In one embodiment of the present application, the time length during which the terminal performs PSCell addition includes the time length from when the terminal receives an MSGB transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSGB transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an RAR transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an RAR transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an MSG4 transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSG4 transmitted from a PCell until when the terminal transmits an MSGA to the PSCell, or the time length from when the terminal receives an MSGA transmitted from a PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives an MSGA transmitted from a PCell until when the terminal transmits an MSGA to the PSCell.

[0159] In an embodiment of the present application, the device further includes a third acquisition module, wherein the third acquisition module acquires a first threshold, wherein the first threshold is associated with channel quality, and wherein the third acquisition module is configured to: determine to perform PSCell addition after transmitting MSG1 to a PCell if the channel quality is equal to or greater than a first value of the first threshold; or determine to perform PSCell addition after receiving MSG2 transmitted from a PCell if the channel quality is equal to or greater than a second value of the first threshold; or determine to perform PSCell addition after receiving MSG4 transmitted from a PCell if the channel quality is equal to or greater than a third value of the first threshold; or determine to perform PSCell addition after receiving MSG5 transmitted from a PCell if the channel quality is equal to or less than the first value of the first threshold and the channel quality is equal to or greater than a second value of the first threshold. or, if the channel quality is equal to or less than the second value of the first threshold and the channel quality is equal to or greater than the third value of the first threshold, determine to add a PSCell after receiving MSG4 transmitted from the PCell, or, if the channel quality is equal to or greater than the fourth value of the first threshold, determine to add a PSCell after transmitting MSGA to the PCell, or, if the channel quality is equal to or greater than the fifth value of the first threshold, determine to add a PSCell after receiving MSGB transmitted from the PCell, or, if the channel quality is equal to or less than the fourth value of the first threshold and the channel quality is equal to or greater than the fifth value of the first threshold, determine to add a PSCell after receiving MSGB transmitted from the PCell.

[0160] In an embodiment of the present application, the device further includes a fourth acquisition module, wherein the fourth acquisition module acquires a second threshold, the second threshold being associated with channel quality, wherein, if the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time, if the channel quality is equal to or greater than a second value of the second threshold, a switching time of the terminal includes a maximum value of the PCell switching time and the PSCell addition time, if the channel quality is equal to or greater than a third value of the second threshold, a switching time of the terminal includes a PCell switching time and / or a PSCell addition time, if the channel quality is equal to or greater than a fourth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time and a PSCell cell search time, and if the channel quality is equal to or greater than a fifth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0161] In an embodiment of the present application, the apparatus further includes a first sending module for sending third information to a network side device, wherein the third information includes whether the terminal supports PCell switching and PSCell addition in a parallel processing manner, whether the terminal supports PCell switching and PSCell addition in a serial processing manner, whether the terminal supports the switching time to include the sum of the PCell switching time and the PSCell addition time, whether the terminal supports the switching time to include the maximum value of the PCell switching time and the PSCell addition time, and whether the terminal supports the switching time to include the maximum value of the PCell switching time and the PSCell addition time. whether the terminal supports the switching time to include the sum of the PCell cell search time and the PSCell cell search time; whether the terminal supports the switching time to include the sum of the PCell cell search time, the PCell synchronization time, the PSCell cell search time, and the PScell synchronization time; eleventh indication information instructing the terminal to perform PSCell addition after the second operation; twelfth indication information instructing the terminal to support parallel processing of the third operation; and thirteenth indication information instructing the terminal to support serial processing of the fourth operation.

[0162] In one embodiment of the present application, the second operation includes one of: sending MSG1 to the PCell; receiving MSG2 sent from the PCell; sending MSG3 to the PCell; receiving MSG4 sent from the PCell; sending MSGA to the PSCell; and receiving MSGB sent from the PCell.

[0163] In an embodiment of the present application, the device further includes a second determination module for determining a first manner representing a manner in which the terminal performs switching including a PSCell addition.

[0164] In one embodiment of the present application, the second determination module further receives fourth information from a network side device, and determines the first method based on the fourth information, or determines the first method based on a protocol specification.

[0165] In one embodiment of the present application, the fourth information includes one or more of: 14th instruction information instructing whether the terminal will perform switching including PSCell addition using a parallel processing method; 15th instruction information instructing whether the terminal will perform switching including PSCell addition using a serial processing method; 16th instruction information indicating that the fifth operation will be processed in parallel; and 17th instruction information indicating that the sixth operation will be processed serially.

[0166] In one embodiment of the present application, the protocol conventions include predefined rules, which include adopting a serial processing method if the network side configures the target PSCell with a measurement time setting based on a synchronization signal block, and adopting a parallel processing method if the network side does not configure the target PSCell with a measurement time setting based on a synchronization signal block.

[0167] In one embodiment of the present application, the third operation, the fourth operation, the fifth operation, or the sixth operation includes one or more of cell detection, time domain synchronization, frequency domain synchronization, automatic gain control, and random access.

[0168] The apparatus provided by the embodiment of the present application can implement each step implemented in the method embodiment shown in FIG. 2 and achieve the same technical effects, so to avoid duplication, the description will be omitted here.

[0169] Referring to FIG. 5, an embodiment of the present application provides a switching apparatus applied to a network side device, the apparatus 500 including: a second sending module 501 for sending first information, where the first information is a PRACH (Performance Control Channel) signal sent by the terminal to a PCell; The instruction information includes one or more of: first instruction information instructing the terminal to add a PSCell after transmitting a preamble; second instruction information instructing the terminal to add a PSCell after receiving an RAR transmitted from a PCell; third instruction information instructing the terminal to add a PSCell after receiving an MSG4 transmitted from a PCell; fourth instruction information instructing the terminal to add a PSCell after transmitting an MSGA to a PCell; and fifth instruction information instructing the terminal to add a PSCell after receiving an MSGB transmitted from a PCell.

[0170] In an embodiment of the present application, the device further includes a third transmission module for transmitting second information, wherein the second information includes one or more of: sixth indication information indicating that the switching time of the terminal includes the sum of the PCell switching time of the terminal and the PSCell addition time of the terminal; seventh indication information indicating that the switching time of the terminal includes the maximum value of the PCell switching time of the terminal and the PSCell addition time of the terminal; eighth indication information indicating that the switching time of the terminal includes the PCell switching time of the terminal and / or the PSCell addition time of the terminal; ninth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal and the PSCell cell search time of the terminal; and tenth indication information indicating that the switching time of the terminal includes the sum of the PCell cell search time of the terminal, the PCell synchronization time of the terminal, the PSCell cell search time of the terminal, and the PSCell synchronization time of the terminal.

[0171] Alternatively, the length of the switching time of the terminal is a first length of time, and when the first information includes the first instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal transmits a preamble to a PCell, and a length of time for the terminal to perform PSCell addition; or when the first information includes the second instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal receives an RAR transmitted from a PCell, and a length of time for the terminal to perform PSCell addition; or when the first information includes the third instruction information, the first length of time is the sum of a length of time from when the terminal receives an RRC message including switching to when the terminal receives an RAR transmitted from a PCell, and a length of time for the terminal to perform PSCell addition. or, if the first information includes the fourth instruction information, the first time length is the sum of the time length from when the terminal receives the RRC message including the switching until when the terminal receives MSG4 transmitted from the PCell, and the time length during which the terminal adds a PSCell; or, if the first information includes the fifth instruction information, the first time length is the sum of the time length from when the terminal receives the RRC message including the switching until when the terminal transmits MSGA to the PCell, and the time length during which the terminal adds a PSCell; or, if the first information includes the fifth instruction information, the first time length is the sum of the time length from when the terminal receives the RRC message including the switching until when the terminal receives MSGB transmitted from the PCell, and the time length during which the terminal adds a PSCell.

[0172] Alternatively, the time length during which the terminal performs PSCell addition includes the time length from when the terminal receives MSGB transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSGB transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives RAR transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives RAR transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSG4 transmitted from the PCell until when the terminal transmits MSGA to the PSCell, or the time length from when the terminal receives MSGA transmitted from the PCell until when the terminal transmits a pramble to the PSCell, or the time length from when the terminal receives MSGA transmitted from the PCell until when the terminal transmits MSGA to the PSCell.

[0173] In an embodiment of the present application, the device further includes a fourth transmission module, wherein the fourth transmission module transmits a second threshold, the second threshold being associated with channel quality, wherein if the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time, if the channel quality is equal to or greater than a second value of the second threshold, a switching time of the terminal includes a maximum value of the PCell switching time and the PSCell addition time, if the channel quality is equal to or greater than a third value of the second threshold, a switching time of the terminal includes a PCell switching time and / or a PSCell addition time, if the channel quality is equal to or greater than a fourth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time and a PSCell cell search time, and if the channel quality is equal to or greater than a fifth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

[0174] In an embodiment of the present application, the device further includes a first receiving module for receiving third information, wherein the third information includes whether the terminal supports performing PCell switching and PSCell addition in a parallel processing manner, whether the terminal supports performing PCell switching and PSCell addition in a serial processing manner, whether the terminal supports that the switching time includes the sum of the PCell switching time and the PSCell addition time, whether the terminal supports that the switching time includes the maximum value of the PCell switching time and the PSCell addition time, and whether the terminal supports that the switching time includes the PCell switching time and / or the PSCell addition time. whether the terminal supports the switching time to include a PSCell addition time, whether the terminal supports the switching time to include a sum of a PCell cell search time and a PSCell cell search time, whether the terminal supports the switching time to include a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PScell synchronization time, eleventh indication information instructing the terminal to perform PSCell addition after the second operation, twelfth indication information instructing the terminal to support parallel processing of the third operation, and thirteenth indication information instructing the terminal to support serial processing of the fourth operation.

[0175] Optionally, the second operation includes one of sending MSG1 to the PCell, receiving MSG2 sent from the PCell, sending MSG3 to the PCell, receiving MSG4 sent from the PCell, sending MSGA to the PSCell, and receiving MSGB sent from the PCell.

[0176] In one embodiment of the present application, the device further includes a fifth sending module for sending fourth information, where the fourth information includes one or more of: fourteenth instruction information indicating whether the terminal will perform PSCell addition using a parallel processing method; fifteenth instruction information indicating whether the terminal will perform PSCell addition using a serial processing method; sixteenth instruction information indicating that the fifth operation will be processed in parallel; and seventeenth instruction information indicating that the sixth operation will be processed in serial.

[0177] The apparatus provided by the embodiment of the present application can implement each step implemented in the method embodiment shown in FIG. 3 and achieve the same technical effects, so to avoid duplication, the description will be omitted here.

[0178] Specifically, FIG. 6 is a schematic diagram illustrating a hardware configuration of a terminal for implementing an embodiment of the present application, where the terminal 600 includes at least some components such as, but not limited to, a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, and a processor 610.

[0179] As will be understood by those skilled in the art, the terminal 600 may also include a power source (e.g., a battery) that supplies power to each component, and the power source is logically connected to the processor 610 via a power management system, thereby realizing functions such as charging, discharging, and power consumption management via the power management system. The terminal structure shown in Figure 6 does not constitute a limitation of the terminal, and the terminal may include more or fewer components than those shown, may combine some components, or may have a different component arrangement, which will not be described here.

[0180] In this embodiment, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042. The graphics processor 6041 processes image data of still or video images captured by an image capture device (e.g., a camera) in a video capture mode or a photography mode. The display unit 606 may include a display panel 6061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like. The user input unit 607 includes a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. The other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a control lever, and description thereof will be omitted here.

[0181] In the embodiment of the present application, the radio frequency unit 601 receives downstream data from the network side device, and then processes the received downstream data in the processor 610, and transmits upstream data to the network side device. Typically, the radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a combiner, a low-noise amplifier, a duplexer, etc.

[0182] The memory 609 can be used to store software programs or instructions and various data. The memory 609 mainly includes a program or instruction storage area and a data storage area, where the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (e.g., audio playback function, image playback function, etc.), etc. The memory 609 can include high-speed random access memory and can also include non-transient memory, where the non-transient memory is read-only memory. Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM, Electrically Erasable Programmable Read-Only Memory The memory may be an EPROM, EEPROM, or flash memory, for example, at least one disk storage device, a flash memory device, or other non-transient solid-state storage device.

[0183] The processor 610 may include one or more processing units, and may optionally integrate an application processor that mainly processes an operating system, a user interface, and applications or instructions, and a modem processor that mainly processes wireless communications, such as a baseband processor. It should be understood that the modem processor does not have to be integrated into the processor 610.

[0184] The terminal provided by the embodiment of the present application can implement each process implemented in the method embodiment shown in FIG. 2 and achieve the same technical effects, so to avoid duplication, the description will be omitted here.

[0185] Specifically, an embodiment of the present application further provides a network-side device. As shown in Fig. 7, the network-side device 700 includes an antenna 701, a radio frequency device 702, and a baseband device 703. The antenna 701 is connected to the radio frequency device 702. In the uplink direction, the radio frequency device 702 receives information through the antenna 701 and transmits the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes the information to be transmitted and transmits it to the radio frequency device 702, and the radio frequency device 702 processes the received information and transmits it via the antenna 701.

[0186] The above frequency band processing device can be disposed in a baseband device 703, and the method performed by the network side device of the above embodiment can be implemented in the baseband device 703, which includes a processor 704 and a memory 705.

[0187] The baseband device 703 may include, for example, as shown in FIG. 7, at least one baseband board, on which multiple chips are arranged, where one chip is, for example, a processor 704, connected to a memory 705, and invokes a program in the memory 705 to perform the network device operations shown in the above method embodiments.

[0188] The baseband device 703 may further include a network interface 706 for communicating with the radio frequency device 702, which may be, for example, a common public wireless interface (CPI). CPRI is abbreviated as CPRI.

[0189] Specifically, the network-side device of the present embodiment further includes instructions or programs stored in the memory 705 and executable by the processor 704 .

[0190] It should be noted that the processor 704 can call instructions or programs in the memory 705 to realize the methods implemented by each module shown in FIG. 5, which will achieve the same technical effects, and therefore will not be described here to avoid duplication.

[0191] As shown in FIG. 8, an embodiment of the present application further provides a communication device 800, which includes a processor 801, a memory 802, and a program or instruction stored in the memory 802 and executable by the processor 801. When the program or instruction is executed by the processor 801, each process of the method embodiment of FIG. 2 or FIG. 3 above can be realized, and similar technical effects can be achieved. Therefore, to avoid redundancy, the description will be omitted here.

[0192] The embodiments of the present application further provide a readable storage medium on which a program or instruction is stored, and when the program or instruction is executed by a processor, each process of the method embodiment shown in FIG. 2 or FIG. 3 above can be realized, and similar technical effects can be achieved. Therefore, to avoid duplication, the description will be omitted here.

[0193] Here, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (Random Access Memory (RAM), etc. These include RAM, disks, and optical disks.

[0194] The steps of a method or algorithm described in connection with the present disclosure may be embodied in hardware or in software instructions executed by a processor, which may be organized into respective software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, removable hard disk, read-only optical disk, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium may be components of the processor. The processor and the storage medium may be included in an ASIC. Further, the ASIC may be included in a core network interface device. Of course, the processor and the storage medium may reside as separate components in the core network interface device.

[0195] Those skilled in the art will recognize that, in one or more of the above examples, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media and communication media, including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

[0196] The specific embodiments described above have further explained the objectives, technical solutions and beneficial effects of the present application in detail, but it should be understood that the above are only specific embodiments of the present application and do not limit the scope of protection of the present application, and any modifications, equivalent substitutions, improvements, etc. based on the claims of the present application should also be included in the scope of protection of the present application.

[0197] It will be apparent to those skilled in the art that embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, embodiments of the present application may take the form of a computer program product embodied in one or more computer-usable storage media (including, but not limited to, magnetic disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0198] The embodiments of the present application will be described with reference to flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be supplied to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine such that the instructions, executed by the processor of the computer or other programmable data processing device, generate means for performing the function(s) specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0199] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, whereby the instructions stored in the computer-readable memory produce an article of manufacture that includes an instruction device that performs the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0200] Computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause the computer or other programmable device to execute a series of operational steps to realize a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps to perform the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0201] It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. a step of the terminal performing the switch; The terminal acquires first information; Including, The switching time of the terminal is the sum of the primary cell (PCell) switching time and the primary secondary cell (PSCell) addition time; The maximum value of the PCell switching time and the PSCell addition time; PCell switching time and / or PSCell addition time; The sum of the PCell cell search time and the PSCell cell search time, the sum of the PCell cell search time, the PCell synchronization time, the PSCell cell search time, and the PSCell synchronization time; and and The first information is First indication information instructing the terminal to perform PSCell addition after transmitting a physical random access channel (PRACH) preamble to the PCell; Second indication information instructing the terminal to perform PSCell addition after receiving a random access response (RAR) transmitted from the PCell; and Third indication information instructing the terminal to perform PSCell addition after receiving a message 4 (MSG4) transmitted from the PCell; and Fourth indication information instructing the terminal to perform PSCell addition after transmitting message A (MSGA) to the PCell; Fifth instruction information instructing the terminal to perform PSCell addition after receiving a message B (MSGB) transmitted from the PCell; A switching method including one or more of:

2. If the first condition is met, The switching time of the terminal is The sum of the PCell switching time and the PSCell addition time, The sum of the PCell cell search time and the PSCell cell search time, the sum of the PCell cell search time, the PCell synchronization time, the PSCell cell search time, and the PSCell synchronization time; and [0033] The switching method according to claim 1 , wherein the first condition is that a synchronization signal block-based measurement time configuration (SMTC) of a target-unknown PSCell is configured in the terminal.

3. The terminal acquires second information; The second information is Sixth indication information indicating that the switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time; Seventh indication information indicating that the switching time of the terminal includes a maximum value among a PCell switching time and a PSCell addition time; Eighth indication information indicating that the switching time of the terminal includes a PCell switching time and / or a PSCell addition time; Ninth indication information indicating that the switching time of the terminal includes a sum of a PCell cell search time and a PSCell cell search time; tenth indication information indicating that the switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time; 2. The switching method of claim 1, comprising one or more of:

4. a length of switching time for the terminal is a first length of time; When the first information includes the first instruction information, the first time length is a sum of a time length from when the terminal receives a radio resource control (RRC) message including switching to when the terminal transmits a preamble to a PCell, and a time length during which the terminal performs PSCell addition; or When the first information includes the second instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching until when the terminal receives an RAR transmitted from a PCell, and a time length during which the terminal performs PSCell addition; or When the third instruction information is included in the first information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal receives MSG4 transmitted from a PCell, and a time length during which the terminal performs PSCell addition; or When the first information includes the fourth instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal transmits an MSGA to a PCell, and a time length during which the terminal adds a PSCell; or 2. The switching method according to claim 1, wherein, when the first information includes the fifth instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching until when the terminal receives an MSGB transmitted from a PCell, and a time length for the terminal to add a PSCell.

5. The time length for the terminal to perform PSCell addition is: A time length from when the terminal receives the MSGB transmitted from the PCell to when the terminal transmits a preamble to the PSCell; or The time length from when the terminal receives MSGB transmitted from the PCell to when the terminal transmits MSGA to the PSCell, or A time length from when the terminal receives an RAR transmitted from a PCell to when the terminal transmits a preamble to a PSCell; or The time length from when the terminal receives the RAR transmitted from the PCell to when the terminal transmits the MSGA to the PSCell; or A time length from when the terminal receives MSG4 transmitted from the PCell to when the terminal transmits a preamble to the PSCell; or The time length from when the terminal receives MSG4 transmitted from the PCell to when the terminal transmits MSGA to the PSCell, or A time length from when the terminal receives the MSGA transmitted from the PCell to when the terminal transmits a preamble to the PSCell; or The time length from when the terminal receives the MSGA transmitted from the PCell to when the terminal transmits the MSGA to the PSCell; The switching method of claim 4, comprising:

6. obtaining a first threshold value by the terminal, the first threshold value being related to a channel quality; determining to perform PSCell addition after sending a message 1 (MSG1) to a PCell if the channel quality is equal to or greater than a first value of the first threshold; or determining to perform PSCell addition after receiving a message 2 (MSG2) sent from a PCell if the channel quality is equal to or greater than a second value of the first threshold; or determining to perform PSCell addition after receiving MSG4 transmitted from PCell if the channel quality is equal to or greater than a third value of the first threshold; or determining to perform PSCell addition after receiving MSG2 transmitted from PCell when the channel quality is equal to or less than a first value of the first threshold and the channel quality is equal to or greater than a second value of the first threshold; or performing PSCell addition after receiving MSG4 transmitted from the PCell when the channel quality is equal to or less than a second value of the first threshold and the channel quality is equal to or greater than a third value of the first threshold; or determining to perform PSCell addition after sending MSGA to PCell if the channel quality is equal to or greater than a fourth value of the first threshold; or determining to perform PSCell addition after receiving MSGB transmitted from PCell if the channel quality is equal to or greater than a fifth value of the first threshold; or determining to perform PSCell addition after receiving an MSGB transmitted from a PCell when the channel quality is equal to or less than a fourth value of the first threshold and equal to or greater than a fifth value of the first threshold; The switching method of claim 1 , comprising:

7. The terminal obtaining a second threshold, the second threshold being related to channel quality; When the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time; When the channel quality is equal to or greater than a second value of the second threshold, the switching time of the terminal comprises a maximum value of a PCell switching time and a PSCell addition time; When the channel quality is equal to or greater than a third value of the second threshold, a switching time of the terminal includes a PCell switching time and / or a PSCell addition time; when the channel quality is equal to or greater than a fourth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time and a PSell cell search time; 2. The switching method of claim 1, wherein when the channel quality is equal to or greater than a fifth value of the second threshold, the switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

8. The terminal transmits third information to a network side device; The third information is Whether the terminal supports PCell switching and PSCell addition through a parallel processing method; and Whether the terminal supports PCell switching and PSCell addition through a serial processing method; Whether the terminal supports that the switching time includes the sum of the PCell switching time and the PSCell addition time; Whether the terminal supports the switching time including the maximum value of the PCell switching time and the PSCell addition time; Whether the terminal supports the switching time including a PCell switching time and / or a PSCell addition time; Whether the terminal supports a switching time including a sum of a PCell cell search time and a PSCell cell search time; and Whether the terminal supports that the switching time includes the sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSell synchronization time; and eleventh instruction information instructing to perform PSCell addition after the second operation; and twelfth indication information indicating that the terminal supports parallel processing of the third operation; and thirteenth indication information indicating that the terminal supports serial processing of the fourth operation; and 2. The switching method of claim 1, comprising one or more of:

9. The second operation is Sending MSG1 to the PCell; MSG2 transmitted from PCell has been received; and sending a message 3 (MSG3) to the PCell; MSG4 transmitted from PCell has been received; and Sending MSGA to the PSCell; The MSGB transmitted from the PCell has been received; and 9. The switching method of claim 8, comprising one of:

10. receiving fourth information from a network side device by the terminal; The fourth information is Fourteenth instruction information instructing whether the terminal performs switching including PSCell addition by a parallel processing method; Fifteenth instruction information instructing the terminal whether to perform switching including PSCell addition according to a serial processing method; sixteenth indication information indicating that the fifth operation is to be processed in parallel; and seventeenth indication information indicating that the sixth operation is to be processed serially; and 2. The switching method of claim 1, comprising one or more of:

11. The third operation, the fourth operation, the fifth operation, or the sixth operation is Cell detection; Time domain synchronization; Frequency domain synchronization; Automatic gain control; Random access and 9. The switching method of claim 8, comprising one or more of:

12. a network side device transmitting first information; The first information is First instruction information instructing the terminal to add a PSCell after transmitting a PRACH preamble to the PCell; Second instruction information instructing the terminal to perform PSCell addition after receiving the RAR transmitted from the PCell; Third instruction information instructing the terminal to perform PSCell addition after receiving MSG4 transmitted from the PCell; and Fourth instruction information instructing the terminal to perform PSCell addition after transmitting MSGA to PCell; Fifth instruction information instructing the terminal to perform PSCell addition after receiving the MSGB transmitted from the PCell; A switching method including one or more of:

13. the network side device transmitting second information; The second information is Sixth indication information indicating that the switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time; Seventh indication information indicating that the switching time of the terminal includes a maximum value among a PCell switching time and a PSCell addition time; Eighth indication information indicating that the switching time of the terminal includes a PCell switching time and / or a PSCell addition time; Ninth indication information indicating that the switching time of the terminal includes a sum of a PCell cell search time and a PSCell cell search time; tenth indication information indicating that the switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time; 13. The switching method of claim 12, comprising one or more of:

14. a length of switching time for the terminal is a first length of time; When the first information includes the first instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal transmits a preamble to a PCell and a time length during which the terminal adds a PSCell, or When the first information includes the second instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching until when the terminal receives an RAR transmitted from a PCell, and a time length during which the terminal performs PSCell addition; or When the third instruction information is included in the first information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal receives MSG4 transmitted from a PCell, and a time length during which the terminal performs PSCell addition; or When the first information includes the fourth instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching to when the terminal transmits an MSGA to a PCell, and a time length during which the terminal adds a PSCell; or 13. The switching method according to claim 12, wherein, when the first information includes the fifth instruction information, the first time length is a sum of a time length from when the terminal receives an RRC message including switching until when the terminal receives an MSGB transmitted from a PCell, and a time length for the terminal to add a PSCell.

15. The time length for the terminal to perform PSCell addition is: A time length from when the terminal receives MSGB transmitted from the PCell to when the terminal transmits Pramble to the PSCell; or The time length from when the terminal receives MSGB transmitted from the PCell to when the terminal transmits MSGA to the PSCell, or A time length from when the terminal receives an RAR transmitted from a PCell to when the terminal transmits a Pramble to a PSCell; or The time length from when the terminal receives the RAR transmitted from the PCell to when the terminal transmits the MSGA to the PSCell; or A time length from when the terminal receives MSG4 transmitted from the PCell to when the terminal transmits Pramble to the PSCell; or The time length from when the terminal receives MSG4 transmitted from the PCell to when the terminal transmits MSGA to the PSCell, or A time length from when the terminal receives MSGA transmitted from the PCell to when the terminal transmits Pramble to the PSCell; or The switching method according to claim 14 , including a time length from when the terminal receives the MSGA transmitted from the PCell to when the terminal transmits the MSGA to the PSCell.

16. the network side device transmitting a second threshold value, the second threshold value being related to channel quality; When the channel quality is equal to or greater than a first value of the second threshold, a switching time of the terminal includes a sum of a PCell switching time and a PSCell addition time; When the channel quality is equal to or greater than a second value of the second threshold, the switching time of the terminal comprises a maximum value of a PCell switching time and a PSCell addition time; When the channel quality is equal to or greater than a third value of the second threshold, a switching time of the terminal includes a PCell switching time and / or a PSCell addition time; when the channel quality is equal to or greater than a fourth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time and a PSell cell search time; 13. The switching method of claim 12, wherein, when the channel quality is equal to or greater than a fifth value of the second threshold, a switching time of the terminal includes a sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time.

17. receiving third information by the network side device; The third information is Whether the terminal supports PCell switching and PSCell addition through a parallel processing method; and Whether the terminal supports PCell switching and PSCell addition through a serial processing method; Whether the terminal supports that the switching time includes the sum of the PCell switching time and the PSCell addition time; Whether the terminal supports the switching time including the maximum value of the PCell switching time and the PSCell addition time; Whether the terminal supports the switching time including a PCell switching time and / or a PSCell addition time; Whether the terminal supports a switching time including a sum of a PCell cell search time and a PSCell cell search time; and Whether the terminal supports that the switching time includes the sum of a PCell cell search time, a PCell synchronization time, a PSCell cell search time, and a PSCell synchronization time; and eleventh instruction information instructing to perform PSCell addition after the second operation; and twelfth indication information indicating that the terminal supports parallel processing of the third operation; and thirteenth indication information indicating that the terminal supports serial processing of the fourth operation; and 13. The switching method of claim 12, comprising one or more of:

18. The second operation is Sending MSG1 to the PCell; MSG2 transmitted from PCell has been received; and Sending MSG3 to the PCell; MSG4 transmitted from PCell has been received; and Sending MSGA to the PSCell; The MSGB transmitted from the PCell has been received; and 18. The switching method of claim 17, comprising one of:

19. the network side device transmitting fourth information; The fourth information is Fourteenth indication information indicating whether the terminal performs PSCell addition by a parallel processing method; Fifteenth indication information indicating whether the terminal adds a PSCell by a serial processing method; sixteenth indication information indicating that the fifth operation is to be processed in parallel; and and seventeenth indication information indicating that the sixth operation is to be processed serially.

20. A switching device applied to a terminal, comprising: a switching module for performing the switching; a first acquisition module for acquiring first information; Including, The switching time of the terminal is The sum of the PCell switching time and the PSCell addition time, The maximum value of the PCell switching time and the PSCell addition time; PCell switching time and / or PSCell addition time; The sum of the PCell cell search time and the PSCell cell search time, the sum of the PCell cell search time, the PCell synchronization time, the PSCell cell search time, and the PSCell synchronization time; and and The first information is First indication information instructing the terminal to perform PSCell addition after transmitting a physical random access channel (PRACH) preamble to the PCell; Second indication information instructing the terminal to perform PSCell addition after receiving a random access response (RAR) transmitted from the PCell; and Third indication information instructing the terminal to perform PSCell addition after receiving a message 4 (MSG4) transmitted from the PCell; and Fourth indication information instructing the terminal to perform PSCell addition after transmitting message A (MSGA) to the PCell; Fifth instruction information instructing the terminal to perform PSCell addition after receiving a message B (MSGB) transmitted from the PCell; a switching device including one or more of:

21. A switching device applied to a network side device, a second transmitting module for transmitting the first information; The first information is First instruction information instructing the terminal to add a PSCell after transmitting a PRACH preamble to the PCell; Second instruction information instructing the terminal to perform PSCell addition after receiving the RAR transmitted from the PCell; Third instruction information instructing the terminal to perform PSCell addition after receiving MSG4 transmitted from the PCell; and Fourth instruction information instructing the terminal to perform PSCell addition after transmitting MSGA to PCell; Fifth instruction information instructing the terminal to perform PSCell addition after receiving the MSGB transmitted from the PCell; A switching device including one or more of:

22. A communications device comprising a processor, a memory, and a program stored in the memory and executable by the processor, wherein when the program is executed by the processor, the steps of the method of any one of claims 1 to 11 are implemented.

23. A communications device comprising a processor, a memory, and a program stored in the memory and executable by the processor, wherein when the program is executed by the processor, the steps of the method of any one of claims 12 to 19 are realized.

24. A computer-readable storage medium having a program stored thereon, the program causing the steps of the method according to any one of claims 1 to 11 to be implemented when the program is executed by a processor.

25. A computer-readable storage medium on which a program is stored, the program being capable of realizing the steps of the method of any one of claims 12 to 19 when executed by a processor.

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