Master cell group radio link failure processing method, apparatus, and terminal

Abstract

The application discloses a master cell group radio link failure processing method, device and terminal, and belongs to the technical field of communication. The master cell group radio link failure processing method comprises the following steps: in the case that a radio link failure occurs in the MCG of a terminal, the terminal initiates an RRC reestablishment process or initiates an MCG failure information process according to first information; wherein the first information comprises at least one of the following: the SCG state of the terminal, whether the terminal has sent first request information to a network side device, whether the terminal has sent state indication information of the SCG to the network side device, whether the corresponding capability of the SCG is available, whether the terminal has sent indication information of the corresponding capability of the SCG to the network side device, the link condition of the SCG, the network resource corresponding to the SCG, and the service information of the terminal; and the first request information is used for requesting to control the SCG to be in a first SCG state.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a method, apparatus and terminal for handling wireless link failure in a primary cell group. Background Technology

[0002] Currently, User Equipment (UE) (also known as a terminal or terminal device) directly initiates the Master Cell Group (MCG) failure information process under the following conditions:

[0003] The UE is configured with timer T316;

[0004] The UE is configured with either a split Signal Radio Bearer (SRB) 1 or SRB3.

[0005] MCG was not suspended;

[0006] The Secondary Cell Group (SCG) was not suspended;

[0007] The UE detected an MCG radio link failure (RLF) and the T316 was not running at that time.

[0008] Specifically, once the UE initiates the MCG failure information procedure (also known as the Fast MCG recovery procedure), the UE performs at least the following steps: 1. Suspend at least part of the MCG transmission; 2. Generate an MCG failure information message (MCGFailureInformation); 3. Start timer T316; 4. Send the MCG failure information message to the lower layer transmission. This MCGFailureInformation message is sent to the network through the secondary cell group, specifically via SRB3 or Split SRB1.

[0009] After receiving the MCGFailureInformation message, the network can take corresponding actions, such as sending a Radio Resource Control (RRC) reconfiguration message or an RRC release message to the UE. During T316 operation, if the UE receives a Reconfiguration message from the MN (carrying synchronization reconfiguration parameters), T316 is stopped; if T316 times out, the UE triggers the RRC reconstruction procedure.

[0010] As can be seen from the above, the existing MCG RLF processing method has poor flexibility and is prone to causing the recovery of MCG transmission to be time-consuming. Summary of the Invention

[0011] This application provides a method, apparatus, and terminal for handling main cell group radio link failures, which can solve the problem of poor flexibility in the existing MCG RLF handling method.

[0012] Firstly, a method for handling primary cell group radio link failures is provided, the method comprising:

[0013] In the event of a wireless link failure in the terminal's MCG, the terminal initiates an RRC reconstruction procedure or an MCG failure information procedure based on the first information.

[0014] The first information includes at least one of the following: the SCG status of the terminal, whether the terminal has sent a first request message to the network-side device, whether the terminal has sent the status indication information of the SCG to the network-side device, whether the capability corresponding to the SCG is available, whether the terminal has sent the capability indication information corresponding to the SCG to the network-side device, the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal; the first request message is used to request control of the SCG to be in a first SCG state.

[0015] Secondly, a primary cell group radio link failure handling apparatus is provided, the apparatus comprising:

[0016] The first initiation module is used to initiate an RRC reconstruction process or an MCG failure information process based on the first information when a wireless link failure occurs in the terminal's MCG.

[0017] The first information includes at least one of the following: the SCG status of the terminal, whether the terminal has sent a first request message to the network-side device, whether the terminal has sent the status indication information of the SCG to the network-side device, whether the capability corresponding to the SCG is available, whether the terminal has sent the capability indication information corresponding to the SCG to the network-side device, the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal; the first request message is used to request control of the SCG to be in a first SCG state.

[0018] Thirdly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0019] Fourthly, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to initiate an RRC reconstruction process or an MCG failure information process based on first information when a wireless link failure occurs in the terminal's MCG; wherein the first information includes at least one of the following: the terminal's SCG status, whether the terminal has sent a first request message to a network-side device, whether the terminal has sent a status indication message for the SCG to a network-side device, whether the capability corresponding to the SCG is available, whether the terminal has sent an indication message for the capability corresponding to the SCG to a network-side device, the link status of the SCG, the network resources corresponding to the SCG, and the terminal's service information; the first request message is used to request control of the SCG to be in a first SCG state.

[0020] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0021] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the steps of the method described in the first aspect.

[0022] In a seventh aspect, a computer program or program product is provided, the computer program or program product being stored in a non-volatile storage medium, the program or program product being executed by at least one processor to perform the steps of the method as described in the first aspect.

[0023] In this embodiment, when the terminal's MCG experiences a wireless link failure, the terminal determines whether to initiate an RRC reconstruction process or an MCG failure information process based on the first information. Compared with the prior art, which directly initiates the MCG failure information process when the terminal's MCG experiences a wireless link failure, this can improve the flexibility of MCG wireless link failure handling and thus enable faster recovery of MCG transmission. Attached Figure Description

[0024] Figure 1 This is a block diagram of a wireless communication system applicable to embodiments of this application;

[0025] Figure 2 This is a flowchart of a method for handling primary cell group radio link failures provided in an embodiment of this application;

[0026] Figure 3 This is a structural diagram of a primary cell group radio link failure handling device provided in an embodiment of this application;

[0027] Figure 4This is a structural diagram of the communication device provided in the embodiments of this application;

[0028] Figure 5 This is a structural diagram of the terminal provided in the embodiments of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0030] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to applications other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0032] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include smartwatches, wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of terminal 11. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0033] For ease of understanding, the following describes some aspects related to the embodiments of this application:

[0034] I. Dual Connectivity (DC) / Carrier Aggregation (CA)

[0035] Dual connectivity provides the UE with resources from two network nodes: a master node (MN) and a secondary node (SN). Each network node can also utilize carrier aggregation, configuring the UE with a series of serving cells controlled by that node; these serving cells form a cell group. The cell group controlled by the master node (MN) is the master cell group (MCG), and the cell group controlled by the secondary node (SN) is the secondary cell group (SCG). Each cell group contains a special cell (SpCell) and a series of secondary cells (SCells). In the MCG, the special cell is called the primary cell (PCell), and in the SCG, the special cells are called the primary secondary cell (PSCell).

[0036] II. SCG Suspend

[0037] SCG suspend generally refers to one of the following meanings:

[0038] Pause transmission on SCG;

[0039] Suspend the transmission of all Signal Radio Bearer (SRB) and Data Radio Bearer (DRB) on the SCG;

[0040] Suspend the transmission of SCG's Packet Data Convergence Protocol (PDCP) and SCG Radio Link Control (RLC) bearer;

[0041] When a radio link failure occurs in the SCG, the UE can initiate an SCG failure information procedure (i.e., SCG failure information procedure). Specifically, the UE will suspend the SCG and generate an SCG failure information message (i.e., SCGFailureInformation message). This SCGFailureInformation message will be sent to the network side through the MCG, which is not in a suspended state.

[0042] III. SCG Deactivation Status

[0043] Prior to Rel-17, SCG was always active once configured. Rel-17 introduced an SCG deactivation state, which allows the network to deactivate SCG when SCG data volume is low, the terminal is power-saving, or the terminal is overheating. Compared to the previous Rel-17 approach (i.e., releasing SCG), this allows for faster data transmission on SCG once SCG data is available or the overheating issue is resolved.

[0044] During the SCG deactivation state, the UE's behavior may include at least the following: all SCG SCells are in the deactivation state, the terminal does not listen to the PSCell's Physical Downlink Shared Channel (PDCCH), does not send the Uplink Shared Channel (UL-SCH), and does not send the Sounding Reference Signal (SRS).

[0045] Currently, the standard does not specify clear terminal behavior when an MCG experiences an RLF and an SCG is in a deactivated state.

[0046] IV. Multiple Universal Subscriber Identity Module (Multi-USIM) Terminal

[0047] The aforementioned multi-SIM terminal can be simply referred to as a multi-SIM terminal. A multi-SIM terminal refers to a terminal that has more than one SIM card installed. It should be noted that in this embodiment, SIM card and USIM card can be understood as having the same meaning.

[0048] Taking dual-SIM terminals as an example, based on whether the terminal supports sending or receiving simultaneously in the networks of two cards, dual-SIM terminals can be divided into single-transmit / single-receive, single-transmit / dual-receive, and dual-transmit / dual-receive terminals.

[0049] Single-transmitter, single-receiver terminal: The terminal's implementation method (such as dual cards sharing the same hardware or radio frequency) means that the terminal can only send and receive information alternately on the networks of the two cards in a time-division manner;

[0050] Single-transmitter dual-receiver terminal: The terminal can only alternate uplink transmission on the networks of two cards in a time-division manner, but it supports downlink reception on the networks of two cards simultaneously;

[0051] Dual-transmitter / dual-receiver terminal: The terminal supports simultaneous uplink transmission and downlink reception on two SIM card networks.

[0052] V. Temporary Capability Restriction

[0053] Currently, for dual-transmitter / dual-receiver terminals, each SIM card uses its own independent hardware module (or terminal capability) to support simultaneous transmission and reception. However, this approach suffers from low hardware utilization efficiency and high costs. To address this, the 3rd Generation Partnership Project (3GPP) Release 18 (Rel-18) will investigate how to support dynamic capability allocation between dual-SIM terminals in networks where both SIM cards share some hardware modules / capabilities. For example, when SIM A (e.g., SIM card A) is connected and SIM B (e.g., SIM card B) is disconnected, the terminal's capabilities are occupied by SIM A. If SIM B needs to establish or restore an RRC connection, a portion of SIM A's capabilities needs to be transferred to SIM B. In this case, the terminal needs to indicate a temporary capability-limited state (i.e., some capabilities are needed for other SIM cards) to network A (i.e., the network corresponding to SIM A). Otherwise, the terminal may lose data from network A or waste network resources.

[0054] The terminal indicates a temporary capability limitation to the network side. This temporary limitation could mean that certain wireless capabilities of the terminal are not supported for a period of time, or it could mean that the terminal does not change its wireless capabilities but requests or instructs the network side to disable certain functions / resources. For example, when a dual-SIM terminal is in connected mode and configured with a DC in network A, the SCG is in active mode. If the terminal wants to initiate an RRC connection establishment in network B (i.e., the network corresponding to SIM B), the multi-SIM terminal can request to suspend / deactivate the SCG in network A.

[0055] This application provides a method for handling main cell group radio link failures based on the following three scenarios, so as to restore MCG transmission as soon as possible.

[0056] For ease of description, the following explanation will only use an example where the terminal has both a first SIM card and a second SIM card:

[0057] Scenario 1: If the terminal wants to start sending and receiving on the second network (i.e., the network corresponding to the second SIM card), it can request to deactivate the SCG in the first network (i.e., the network corresponding to the first SIM card).

[0058] Scenario 2: When a terminal needs to start sending and receiving on a second network, it can request to keep the SCG active but suspend SCG transmission in the first network. It should be noted that one difference between suspending the SCG and deactivating the SCG is that some resources of the SCG can be preserved.

[0059] Scenario 3: The terminal wants to start sending and receiving on the second network. The terminal does not request to change the RRC state of the SCG (i.e., it does not request the SCG to be deactivated or suspended), but it indicates to the first network that some or all of the terminal's SCG-related capabilities are in an unavailable / restricted state.

[0060] The method for handling primary cell group radio link failures provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0061] Please see Figure 2 , Figure 2 This is a flowchart of a primary cell group radio link failure handling method provided in an embodiment of this application, as shown below. Figure 2 As shown, the primary cell group radio link failure handling method provided in this application embodiment includes the following steps:

[0062] Step 201: In the event of a wireless link failure in the terminal's MCG, the terminal initiates an RRC reconstruction procedure or an MCG failure information procedure based on the first information.

[0063] The first information includes at least one of the following: the SCG status of the terminal, whether the terminal has sent a first request message to the network-side device, whether the terminal has sent the status indication information of the SCG to the network-side device, whether the capability corresponding to the SCG is available, whether the terminal has sent the capability indication information corresponding to the SCG to the network-side device, the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal; the first request message is used to request control of the SCG to be in a first SCG state.

[0064] In this embodiment, the terminal can be a terminal with only one USIM card or SIM card installed (single-card terminal) or a terminal with more than one USIM card or SIM card installed (multi-card terminal). For multi-card terminals, for ease of description, this embodiment uses the first SIM card and the second SIM card of the terminal as examples. The first SIM card and the second SIM card can be any two of the at least two SIM cards. The network corresponding to the first SIM card is the first network, and the network corresponding to the second SIM card is the second network. It can be understood that the network corresponding to the SIM card can refer to the network to which the SIM card is connected or resides. The main cell group radio link failure handling method provided in this embodiment can be applied between the first SIM card and the first network of a multi-card terminal, and can also be applied between a single-card terminal and the currently accessed or resided network. To avoid redundancy, this embodiment does not emphasize which network the main cell group radio link failure handling method is executed on, because it is clear from the context which network the terminal executes the main cell group radio link failure handling method provided in this embodiment.

[0065] The aforementioned SCG states may include, but are not limited to, active, deactivated, or suspended states, and may also include newly introduced states, such as SCG sleep state. The suspended state of the SCG can be understood as one of the following: suspending transmissions on the SCG; suspending all SRB and DRB transmissions on the SCG; suspending the transmissions of the SCG's PDCP and SCG RLC bearer. Optionally, when the SCG is suspended, it may be in an active state or maintain its current state.

[0066] The aforementioned first request information may include, but is not limited to, activation requests, deactivation requests, or suspension requests. Correspondingly, the aforementioned first SCG state may include, but is not limited to, activation state, deactivation state, or suspension state. For example, if the aforementioned first request information is a deactivation request, then the first SCG state is a deactivation state; if the aforementioned first request information is a suspension request, then the first SCG state is a suspension state.

[0067] Optionally, for a single-card terminal, the terminal may trigger the sending of the first request information based on reasons such as power saving, no data transmission, or terminal overheating, to request that the SCG be put into a deactivated state or a suspended state.

[0068] Optionally, for multi-SIM terminals, whether the terminal has sent a first request message to the network-side device can be used to reflect whether the terminal has requested activation, deactivation, or suspension of the terminal's SCG due to multi-SIM related reasons. For example, it can be agreed that the terminal can only send the first request message to request deactivation or suspension of the SCG due to multi-SIM related reasons (e.g., only when the terminal needs to use the SCG capability of the first network to process the services of the second network). It should be noted that, in this embodiment of the application, the aforementioned multi-SIM related reasons can also be referred to as multi-SIM reasons.

[0069] The status indication information of the SCG is used to indicate the status of the SCG, wherein the status of the SCG may include, but is not limited to, active status, deactivated status, or suspended status.

[0070] Optionally, for multi-SIM terminals, whether the terminal has sent the SCG status indication information to the network-side device can be used to reflect whether the terminal has activated, deactivated, or suspended the terminal's SCG based on multi-SIM related reasons. For example, it can be agreed that the terminal can only deactivate, suspend, or activate the SCG itself based on multi-SIM related reasons (e.g., when it needs to use the SCG capability of the first network to process the services of the second network), and notify the corresponding network side of the SCG status.

[0071] The capabilities corresponding to the aforementioned SCG may include at least one of the hardware capabilities corresponding to the SCG and the terminal capabilities defined by the protocol. Optionally, the unavailability of the capabilities corresponding to the aforementioned SCG may include the unavailability of some capabilities, the unavailability of all capabilities corresponding to the aforementioned SCG, or the unavailability of a certain type or a certain granularity of capability of the aforementioned SCG. For example, the unavailability of a certain type or a certain granularity of capability of the aforementioned SCG may include the unavailability of a certain frequency range, or certain bandwidths, carriers, or band combinations (BC).

[0072] The indication information of the capability corresponding to the SCG can be used to indicate relevant information about the capability corresponding to the SCG. For example, it can be used to indicate whether the capability corresponding to the SCG is available, or it can be used to indicate at least one of the available capability information and unavailable capability information among the capabilities corresponding to the SCG.

[0073] The link status of the aforementioned SCG may include, but is not limited to, at least one of the following: the status of the aforementioned SCG's Time Alignment Timer (TAT), the aforementioned SCG's link synchronization status, and the aforementioned SCG's link quality.

[0074] The network resources corresponding to the aforementioned SCG may include whether the aforementioned SCG is configured with preset network resources, such as whether the aforementioned SCG is configured with dedicated RACH resources. The aforementioned dedicated RACH resources may be dedicated RACH resources for SCG recovery or dedicated RACH resources for other purposes.

[0075] The service information of the aforementioned terminal may include at least one of service type, service priority, and Quality of Service (QoS). Specifically, the service information of the terminal may include at least one of the service information of the terminal's SCG and the service information of the terminal's MCG. For example, whether the service type of the terminal's SCG in the first network is a preset service type, or whether the service priority of the terminal's SCG in the first network is higher than the service priority of the terminal's SCG in the second network, etc.

[0076] In this embodiment, if the terminal's MCG experiences a radio link failure, the terminal can choose whether to initiate an RRC reconstruction procedure or an MCG failure information procedure based on the first information. The following explanation uses examples to illustrate this.

[0077] In an optional embodiment, if an MCG RLF occurs in the first network during the above SCG deactivation period, the terminal initiates an RRC connection reconstruction procedure (hereinafter referred to as Method 1).

[0078] In this embodiment, if the single-card terminal sends an SCG deactivation request to the network side before the SCG is deactivated, but has not yet received the SCG deactivation command from the network side, and the terminal detects an MCG RLF, since the terminal is unsure whether it will receive an SCG deactivation command or an outdated SCG deactivation command during the execution of the MCG failure information process, the safest approach for the terminal is to initiate an RRC connection reconstruction process. This can restore the terminal's service transmission relatively quickly.

[0079] In another optional embodiment, if an MCG RLF occurs in the first network during SCG deactivation, the terminal's RRC layer initiates an MCG failure information procedure (hereinafter referred to as Method Two).

[0080] This embodiment can include the following three implementation methods:

[0081] Method 1: The terminal initiates the MCG failure information process, that is, the RRC layer generates an MCG failure information message, which further triggers the SCG activation operation.

[0082] Method 2: The terminal initiates the MCG failure information procedure. The terminal first initiates the SCG activation operation (for example, the UE's RRC layer triggers the lower layer to initiate random access or send a scheduling request on the PSCell). If the SCG is activated, the MCG failure information message is generated. If the SCG activation fails, the terminal initiates the RRC reconstruction procedure.

[0083] Method 3: The terminal first initiates the SCG activation operation (for example, the UE's RRC layer triggers the lower layer to initiate random access or send a scheduling request on the PSCell). If the SCG is activated, the MCG failure information procedure is initiated. If the SCG activation fails, the RRC reconstruction procedure is initiated.

[0084] In another optional embodiment, if the RRC layer determines that the SCG is in a deactivated state for power saving purposes, the terminal initiates an SCG activation process. If the SCG is in a deactivated state for multi-card operation and / or the SCG is being used by another card, the terminal's RRC layer can directly initiate an RRC reconstruction process.

[0085] In another optional embodiment, the SCG's current deactivation state could be initiated by either the network or the terminal. If initiated by the network, the SCG might be deactivated due to a lack of data transmission, in which case the terminal's second approach is reasonable. However, if the SCG's deactivation state is initiated by the terminal, it might be related to multi-SIM card issues. For example, the protocol might stipulate that the terminal can only send an SCG deactivation request when its multi-SIM card capability is limited, and this limitation is static, semi-static, or not easily changed. In this case, the terminal's SCG might be occupied by another SIM card and unable to send the MCG failure information message. The terminal would then need to wait until T316 timeout before initiating RRC reconstruction. In this situation, a better approach is for the terminal to directly initiate the RRC reconstruction process.

[0086] In another optional embodiment, if the protocol stipulates that the terminal is only allowed to deactivate, suspend, or activate the SCG on its own in the first case, wherein the first case is based on multi-SIM related reasons and the multi-SIM related reasons are static, semi-static, or not easily changed, and the protocol stipulates that the terminal notifies the network side of the current SCG status, then if the terminal has reported to the network side that the SCG status is in a deactivated state, then the terminal is likely unable to use the SCG to achieve FastMCG recovery. Therefore, a better approach is to directly initiate the RRC reconstruction process.

[0087] It should be noted that, in the embodiments of this application, the meaning of the above-mentioned reasons related to multiple cards may include, but is not limited to, at least one of the following:

[0088] Some or all of the terminal's capabilities are being used by other cards;

[0089] Some or all of the terminal's capabilities are rendered unusable due to interference with or by other cards;

[0090] The terminal is switching between multiple cards for some or all of its capabilities, i.e., it is in a switching state;

[0091] Some or all of the terminal's capabilities are unavailable;

[0092] Some or all of the terminal's capabilities are restricted or disabled.

[0093] For example, the terminal's first network is configured with a DC (Distributed Control Center), where the SCG (Super Grid Garbage Collection) is active. If the terminal needs to use the SCG capabilities of the first network to handle services from the second network, the terminal can deactivate or suspend the SCG of the first network. In the event of a radio link failure in the MCG (Multi-Channel Group) of the first network, the terminal can choose, based on the first information, whether to initiate an RRC (Rebuild Control Code) reconstruction procedure or an MCG failure information procedure.

[0094] The main cell group radio link failure handling method provided in this application improves the judgment conditions for initiating the MCG failure information process or the RRC reconstruction process when the terminal's MCG experiences a radio link failure. This improves the flexibility of MCG radio link failure handling and enables faster recovery of MCG transmission.

[0095] Optionally, the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, including:

[0096] If the first condition is met, the terminal initiates the RRC reconstruction process;

[0097] The first condition includes at least one of the following:

[0098] The terminal's SCG state is either suspended or deactivated.

[0099] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a suspended state or a deactivated state.

[0100] The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state or a deactivated state.

[0101] The capability corresponding to the SCG is unavailable;

[0102] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0103] The link status of the SCG did not meet the preset conditions;

[0104] The SCG was not configured with preset network resources;

[0105] The service type of the terminal does not belong to the preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0106] In this embodiment, the link status of the SCG does not meet the preset conditions, for example, the TAT of the SCG times out, and the link quality of the SCG is lower than the preset threshold.

[0107] The unavailability of the capabilities corresponding to the aforementioned SCG can include partial unavailability, complete unavailability, or unavailability of a certain type or granularity of capability of the aforementioned SCG. Specifically, unavailability of a certain type or granularity of capability of the aforementioned SCG could mean, for example, that a certain frequency range, bandwidth, carrier, or BC of the aforementioned SCG is unavailable.

[0108] The aforementioned SCG is not configured with preset network resources. For example, the aforementioned SCG is not configured with dedicated RACH resources. The aforementioned dedicated RACH resources may be dedicated to SCG recovery, dedicated to SCG activation, or dedicated to other purposes.

[0109] The service types of the aforementioned terminals are not preset service types. For example, the preset service types can be reasonably set according to actual needs, such as services with high importance or high real-time requirements; or the preset service types can be predefined by the protocol; or the preset service types can be configured by the network side.

[0110] Optionally, at least one of the following can be used to reflect that the terminal has activated or suspended the terminal's SCG due to multi-SIM related reasons: the terminal has sent the first request information to the network-side device, the terminal has sent the status indication information to the network-side device, and the terminal has sent the indication information of the capability corresponding to the SCG to the network-side device.

[0111] In practical applications, when a terminal deactivates or suspends the aforementioned SCG due to multi-SIM related reasons, and if the SCG is typically occupied for a long time due to multi-SIM related reasons, the terminal can directly initiate the RRC reconstruction procedure if the MCG experiences a radio link failure. This avoids the inability to send the MCG failure information message due to the SCG being occupied, thereby accelerating the recovery of MCG transmission. For example, if the terminal's SCG on the first network is active, and the terminal needs to use the SCG capabilities of the first network to process services on the second network, the terminal deactivates or suspends the SCG on the first network. If the MCG on the first network experiences a radio link failure, since the terminal activated or suspended the SCG due to multi-SIM related reasons, it can directly initiate the RRC reconstruction procedure on the first network to restore MCG transmission on the first network as quickly as possible.

[0112] Optionally, in this embodiment, if the first condition is not met, the terminal may initiate an MCG failure information process to restore MCG transmission as soon as possible.

[0113] Optionally, the link status of the SCG does not meet the preset conditions, including at least one of the following:

[0114] The SCG's advance timer TAT has timed out or not run;

[0115] The uplink of the SCG is not synchronized;

[0116] The downlink of the SCG is not synchronized;

[0117] The link quality of the SCG is lower than a preset threshold;

[0118] No measurement results for the link quality of the SCG were found.

[0119] The SCG exhibits beam anomalies.

[0120] In this embodiment, the aforementioned preset threshold can be reasonably set according to actual needs, or it can be agreed upon by protocol, or it can be configured by the network side.

[0121] Optionally, the absence of link quality measurement results for the SCG may mean that there are no valid link quality measurement results for the SCG. The aforementioned beam anomalies of the SCG may include, but are not limited to, beam failure in at least one serving cell of the SCG, or the absence of available beams in at least one serving cell of the SCG.

[0122] Optionally, before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, the method further includes at least one of the following:

[0123] When the SCG is in a suspended state, the RRC layer of the terminal restores the SCG;

[0124] When the SCG is in a deactivated state, the RRC layer of the terminal performs a first operation, which includes at least one of the following: initiating an SCG activation process; requesting the lower layer to initiate random access on the SCG; and requesting the lower layer to send a scheduling request on the SCG.

[0125] It should be noted that the aforementioned request for the lower layer to initiate random access on the SCG can be made on the PSCell of the SCG. Similarly, the aforementioned request for the lower layer to send a scheduling request on the SCG can be made on the PSCell of the SCG.

[0126] The aforementioned lower layers can be relative to the RRC layer, such as the MAC layer, RLC layer, physical layer, etc.

[0127] In an optional implementation, when the terminal initiates the MCG failure information process based on the first information, the terminal may perform the first operation before generating or sending the MCG failure information message.

[0128] When the aforementioned SCG is in a suspended state, the RRC layer of the terminal restores the aforementioned SCG, so that the terminal can send MCG failure information messages based on the SCG and can receive MN reconfiguration messages from the SCG to restore MCG transmission as soon as possible.

[0129] When the aforementioned SCG is in a deactivated state, the RRC layer of the terminal performs a first operation to activate the SCG. This allows the terminal to send an MCG failure information message based on the SCG to restore MCG transmission as quickly as possible. It should be noted that both requesting the lower layer to initiate random access on the aforementioned SCG and requesting the lower layer to send a scheduling request on the aforementioned SCG can be done to activate the aforementioned SCG.

[0130] Optionally, when the SCG is in a suspended state, the RRC layer of the terminal restores the SCG, including:

[0131] If the second condition is met when the SCG is in a suspended state, the RRC layer of the terminal will restore the SCG.

[0132] The second condition includes at least one of the following:

[0133] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a suspended state;

[0134] The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state;

[0135] The reason for the SCG being in a suspended state is a preset type;

[0136] The capabilities corresponding to the SCG are available;

[0137] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0138] The link status of the SCG has reached the preset condition;

[0139] The SCG is configured with preset network resources;

[0140] The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0141] It should be noted that in the prior art, if the SCG is suspended due to an SCG RLF (Recurrent Link Failure), the terminal reports an SCG failure message through the MCG and only restores the SCG after receiving an SCG reconfiguration from the network side. However, in this embodiment, the terminal can suspend the SCG itself due to multi-SIM related reasons. Since the SCG may not have experienced an RLF at this time, and the terminal's SCG may not be occupied by another SIM (e.g., the service on the second network has ended, and the terminal has not yet requested SCG restoration from the first network), or the terminal's SCG hardware may be occupied by another SIM, but the terminal determines that the MCG radio link restoration priority of the first network is higher based on the implementation method, the terminal does not need to initiate an RRC (Recurrent Link Reconstruction) rebuild. Instead, it initiates an MCG failure information procedure to restore the MC as soon as possible. Therefore, the terminal can restore the SCG itself. Optionally, after restoring the SCG itself, the terminal can notify the network side of the SCG restoration status. Therefore, the terminal can determine the reason for the SCG suspension and take further action, flexibly handling MCG RLF.

[0142] Specifically, the link status of the aforementioned SCG meets preset conditions, such as the SCG's TAT ​​not timed out and the SCG's link quality not lower than a preset threshold, i.e., the SCG's link quality is higher than or equal to a preset threshold. Optionally, the SCG's link status meeting preset conditions may include at least one of the following: the SCG's TAT ​​not timed out; the SCG's uplink synchronization; the SCG's downlink synchronization; and the SCG's link quality not lower than a preset threshold.

[0143] The aforementioned SCG is configured with preset network resources. For example, the aforementioned SCG is configured with dedicated RACH resources, wherein the aforementioned dedicated RACH resources may be RACH resources specifically used for SCG recovery.

[0144] The service type of the aforementioned terminal belongs to a preset service type. For example, the service type of the aforementioned terminal in the first network belongs to a preset service type. The preset service type can be reasonably set according to actual needs, such as services with high importance or high real-time requirements; or the preset service type can be predefined by the protocol; or the preset service type can be configured by the network side.

[0145] The triggering reason for the SCG to be in a suspended state is a preset type. For example, the triggering reason for the SCG to be in a suspended state is a multi-card related reason, such as Multi-USIM purpose.

[0146] Optionally, at least one of the following can be used to indicate that the terminal has sent a first request message to the network-side device, the terminal has sent the status indication message to the network-side device, and the terminal has sent an indication message of the capability corresponding to the SCG to the network-side device: these can be used to reflect that the terminal's SCG is suspended due to multi-SIM related reasons. Furthermore, optionally, the SCG in this embodiment can refer to the terminal's SCG in the first network.

[0147] In practical applications, when a terminal suspends the aforementioned SCG due to multi-SIM related reasons, if the suspension of the SCG due to multi-SIM related reasons is dynamically adjustable or the time the SCG is occupied due to multi-SIM related reasons is usually short, then in the event of a radio link failure in the MCG, the terminal can directly restore the aforementioned SCG and send an MCG failure information message based on the restored SCG, thereby accelerating the recovery of MCG transmission. For example, if a terminal needs to use the SCG capabilities of a first network to process services of a second network, and the terminal suspends the SCG of the first network, and a radio link failure occurs in the MCG of the first network, since the suspension of the aforementioned SCG by the terminal is due to multi-SIM related reasons, the terminal can directly restore the aforementioned SCG and send an MCG failure information message based on the restored SCG, thereby accelerating the recovery of MCG transmission.

[0148] Optionally, in this embodiment, if the second condition is not met when the SCG is in a suspended state, the terminal can initiate an RRC reconstruction process to restore MCG transmission as soon as possible.

[0149] Optionally, when the SCG is in a deactivated state, the RRC layer of the terminal performs a first operation, including:

[0150] If the third condition is met when the SCG is in a deactivated state, the RRC layer of the terminal will perform the first operation.

[0151] The third condition includes at least one of the following:

[0152] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a deactivation state;

[0153] The terminal has sent the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a deactivated state;

[0154] The trigger reason for the SCG to be in an inactive state is a preset type;

[0155] The capabilities corresponding to the SCG are available;

[0156] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0157] The link status of the SCG has reached the preset condition;

[0158] The SCG is configured with preset network resources;

[0159] The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0160] It should be noted that when considering the reason for SCG deactivation to determine whether the terminal should perform RRC reconstruction or MCG failure information process, if the reason for SCG deactivation is related to multiple cards, the terminal can initiate the MCG failure information process; if the reason for SCG deactivation is unrelated to multiple cards or is a preset reason, the terminal can initiate the RRC reconstruction process.

[0161] Specifically, the link status of the aforementioned SCG meets preset conditions, such as the SCG's TAT ​​not timed out and the SCG's link quality not lower than a preset threshold, i.e., the SCG's link quality is higher than or equal to a preset threshold. Optionally, the SCG's link status meeting preset conditions may include at least one of the following: the SCG's TAT ​​not timed out; the SCG's uplink synchronization; the SCG's downlink synchronization; and the SCG's link quality not lower than a preset threshold.

[0162] The aforementioned SCG is configured with preset network resources. For example, the aforementioned SCG is configured with dedicated RACH resources, wherein the aforementioned dedicated RACH resources may be RACH resources specifically used for SCG recovery.

[0163] The service type of the aforementioned terminal belongs to a preset service type. For example, the service type of the aforementioned terminal in the first network belongs to a preset service type. The preset service type can be reasonably set according to actual needs, such as services with high importance or high real-time requirements; or the preset service type can be predefined by the protocol; or the preset service type can be configured by the network side.

[0164] The triggering reason for the above SCG to be in an inactive state is a preset type. For example, the triggering reason for the above SCG to be in an inactive state is a multi-card related reason, such as Multi-USIM purpose.

[0165] Optionally, at least one of the following can be used to indicate that the terminal has sent a first request message to the network-side device, the terminal has sent the status indication message to the network-side device, and the terminal has sent an indication message of the capability corresponding to the SCG to the network-side device: these can be used to reflect that the terminal activated the SCG due to multi-SIM related reasons. Furthermore, optionally, the SCG in this embodiment can refer to the terminal's SCG in the first network.

[0166] In practical applications, when a terminal activates the aforementioned SCG due to multi-SIM related reasons, if the activation of the SCG due to multi-SIM related reasons is dynamically adjustable or the time the SCG is occupied due to multi-SIM related reasons is usually short, then in the event of a radio link failure in the MCG, the terminal can directly restore the aforementioned SCG and send an MCG failure information message based on the restored SCG, thereby accelerating the recovery of MCG transmission. For example, if a terminal needs to use the SCG capability of a first network to process services of a second network, and the terminal activates the SCG of the first network, and a radio link failure occurs in the MCG of the first network, since the terminal activated the aforementioned SCG due to multi-SIM related reasons, the terminal can directly restore the aforementioned SCG and send an MCG failure information message based on the restored SCG, thereby accelerating the recovery of MCG transmission.

[0167] Optionally, in this embodiment, if the third condition is not met when the SCG is in a deactivated state, the terminal can initiate an RRC reconstruction process to restore MCG transmission as soon as possible.

[0168] Optionally, the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, including at least one of the following:

[0169] When the RRC layer receives the first indication information from the lower layer, the RRC layer generates an MCG failure information message, wherein the first indication information is used to indicate at least one of the following: the SCG activation is successful, the random access is successful, the scheduling request is successfully sent, the SCG activation request is successfully sent, and the random access preamble is successfully sent.

[0170] If the RRC layer does not receive the second indication information from the lower layer, or if the RRC layer receives the third indication information sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein, the second indication information is used to indicate at least one of the following: the SCG activation is successful, random access is successful, scheduling request is successfully sent, SCG activation request is successfully sent, and random access preamble is successfully sent; the third indication information is used to indicate that the SCG capability is unavailable.

[0171] In this embodiment, after the RRC layer of the terminal performs the first operation, if the RRC layer receives the first indication information from the lower layer, it indicates that the SCG activation was successful. The RRC layer can then initiate an MCG failure information process, that is, the RRC layer generates an MCG failure information message and sends it to the lower layer. The lower layer can then send the MCG failure information message based on the SCG, thus quickly restoring MCG transmission. If the RRC layer does not receive the second indication information from the lower layer, or if the RRC layer receives the third indication information sent by the lower layer, it indicates that the SCG activation failed. In this case, the RRC layer can initiate the RRC reconstruction process to quickly restore MCG transmission.

[0172] Optionally, the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, including:

[0173] When the SCG is in a deactivated state, the terminal's RRC layer generates an MCG failure message and sends the MCG failure message to the lower layer.

[0174] In this embodiment, when the SCG is in a deactivated state, the terminal's RRC layer generates an MCG failure message and sends it to the lower layer to facilitate MCG transmission as quickly as possible. Optionally, the RRC layer can also request or trigger the lower layer to initiate RACH on the PSCell.

[0175] Optionally, after the terminal's RRC layer generates an MCG failure message and sends the MCG failure message to the lower layer when the SCG is in a deactivated state, the method further includes:

[0176] If the RRC layer does not receive confirmation of the MCG failure message from the lower layer, or if the RRC layer receives a fourth indication message sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein the fourth indication message is used to indicate that the SCG capability is unavailable.

[0177] In this embodiment, if the transmission of the MCG failure information message fails, the RRC layer can initiate the RRC reconstruction process to restore MCG transmission as soon as possible.

[0178] In one implementation, the RRC layer can determine whether the MCG failure message has been successfully transmitted by whether it receives an acknowledgment from the lower layer. For example, if the RRC layer receives an acknowledgment from the lower layer, it means that the MCG failure message has been successfully transmitted; if the RRC layer does not receive an acknowledgment from the lower layer, it means that the MCG failure message has failed to be transmitted.

[0179] In another implementation, the RRC layer can determine whether the MCG failure message has been successfully transmitted by whether it receives the fourth indication information from the lower layer. For example, if the RRC layer receives the fourth indication information from the lower layer, it means that the MCG failure message has been successfully transmitted; if the RRC layer does not receive the fourth indication information from the lower layer, it means that the MCG failure message has failed to be transmitted.

[0180] Optionally, if the RRC layer does not receive confirmation of the MCG failure message from the lower layer during the second time period, or if the RRC layer receives the fourth indication message sent by the lower layer during the second time period, the RRC layer may initiate the RRC reconstruction process. The start time of the second time period may be the time when the RRC layer generates the MCG failure message. The duration of the second time period may be predefined by the protocol, configured by the network-side device, or determined by the terminal.

[0181] For example, a first timer can be started after the RRC layer generates an MCG failure information message. If the first timer expires before the RRC layer receives an indication of successful transmission of the MCG failure information message from the lower layer, the RRC layer immediately triggers the RRC reconstruction process. If an indication of successful transmission of the MCG failure information message reported by the lower layer is received during the first timer's operation, the terminal stops the first timer. The duration of the first timer can be predefined by the protocol, configured by the network-side device, or determined by the terminal.

[0182] Optionally, when the RRC layer requests the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information, the lower layer reports the confirmation information of the MCG failure information message or the fourth indication information to the RRC layer.

[0183] In some scenarios, when a terminal requests to activate the SCG to restore the MCG, it does not need to report the SCG's occupancy status to the lower layers. For example, if the terminal activates the SCG to save power, it does not need to report the SCG's occupancy status to the lower layers. However, in other scenarios, the terminal needs to report the SCG's occupancy status to the lower layers when requesting to activate the SCG to restore the MCG. For example, if the terminal activates the SCG due to multi-SIM card related reasons, it does need to report the SCG's occupancy status to the lower layers.

[0184] Therefore, in this embodiment of the application, when the RRC layer requests the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information, the lower layer reports the confirmation information of the MCG failure information message or the fourth indication information to the RRC layer, which can save resources. For example, when SCG deactivation is triggered by a multi-card related reason, the RRC layer can request the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information at the same time as sending the MCG failure information message to the lower layer.

[0185] Optionally, before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, the method further includes the following:

[0186] The terminal suspends the SCG due to multi-SIM related reasons;

[0187] When the terminal sends indication information of the capability corresponding to the SCG to the network-side device, the terminal automatically suspends the SCG, wherein the indication information of the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0188] The terminal suspends the SCG for reasons related to multiple SIM cards, and the terminal sends indication information of the capability corresponding to the SCG to the network-side device.

[0189] In one embodiment, the terminal may suspend the SCG for reasons related to multiple SIM cards. For example, if the terminal needs to use the SCG capability of the first network to process services of the second network, the terminal may suspend the SCG of the first network.

[0190] Optionally, the terminal may suspend the SCG itself for reasons related to multiple SIM cards; or the terminal may send a suspension request for the SCG to the network-side device for reasons related to multiple SIM cards, and suspend the SCG upon receiving a suspension command from the network-side device.

[0191] Optionally, the aforementioned terminal may initiate an SCG failure information process based on multi-SIM related reasons. Optionally, the SCG failure information message may indicate that the failure type is related to multi-SIM.

[0192] In another embodiment, the terminal may suspend the SCG itself when it sends an indication message to the network-side device indicating that the capability corresponding to the SCG is unavailable. For example, when the terminal sends an indication message to the network-side device indicating that the capability corresponding to the SCG of the first network is unavailable, the terminal may suspend the SCG of the first network itself.

[0193] In another embodiment, the terminal suspends the SCG for a multi-SIM related reason, and the terminal sends indication information of the capability corresponding to the SCG to the network-side device. For example, when the terminal needs to use the SCG capability of the first network to process the service of the second network, the terminal sends indication information to the network-side device to indicate that the capability corresponding to the SCG of the first network is unavailable, and the terminal suspends the SCG of the first network.

[0194] Optionally, after the terminal suspends the aforementioned SCG, that is, while the aforementioned SCG is in a suspended state, if the terminal's MCG experiences a radio link failure, the terminal can initiate an RRC reconstruction procedure.

[0195] Optionally, before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, the method further includes at least one of the following:

[0196] The terminal initiates an SCG failure information process based on multi-card related reasons, and automatically suspends the SCG during or after the initiation of the SCG failure information process.

[0197] During or after the terminal initiates the SCG failure information process, the terminal sets the failure reason value carried in the SCG failure information message to be related to multiple cards.

[0198] In one implementation, the terminal can first initiate an SCG failure information process based on multi-SIM related reasons, and then automatically suspend the SCG during or after initiating the SCG failure information process. For example, if the terminal needs to use the SCG capabilities of the first network to process services of the second network, the terminal can initiate an SCG failure information process on the first network, and automatically suspend the SCG on the first network during or after initiating the SCG failure information process on the first network.

[0199] In another implementation, the terminal can initiate an SCG failure information process, and the failure reason carried in the SCG failure information message is related to multiple SIM cards. For example, if the terminal needs to use the SCG capability of the first network to process the service of the second network, the terminal can initiate an SCG failure information process in the first network, and during or after initiating the SCG failure information process in the first network, set the failure reason value carried in the SCG failure information message to be related to multiple SIM cards, and automatically suspend the SCG in the first network.

[0200] Optionally, the first condition includes the terminal sending indication information to the network-side device indicating that it has passed the capability corresponding to the SCG;

[0201] When the first condition is met, the terminal initiates the RRC reconstruction process, which includes the following:

[0202] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device and the indication information of the capability corresponding to the SCG is in a valid state, the terminal initiates the RRC reconstruction process.

[0203] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period, the terminal initiates the RRC reconstruction process;

[0204] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period and the indication information of the capability corresponding to the SCG is in a valid state, the terminal initiates the RRC reconstruction process.

[0205] In this embodiment, the duration of the first time period can be predefined by the protocol, configured by the network-side device, or determined by the terminal. The end time of the first time period can be the moment when the terminal's MCG experiences a wireless link failure. The indication information of the capability corresponding to the SCG being in a valid state can be understood as the unavailability state of the capability corresponding to the SCG not being cancelled. For example, the terminal has not sent the indication information of the capability being available to the network-side device, or the terminal has not sent a cancellation instruction to the network-side device to cancel the capability state indicated by the indication information of the capability corresponding to the SCG.

[0206] This embodiment can further ensure that the capabilities corresponding to the SCG are unavailable during the period when the MCG wireless link fails, so that the terminal can directly initiate the RRC reconstruction process to restore the MCG transmission as soon as possible.

[0207] Optionally, the service information of the terminal includes at least one of the following: the service information of the terminal's SCG, and the service information of the terminal's MCG;

[0208] The SCG service information of the terminal includes the SCG service information of the terminal in at least one of the M networks;

[0209] The MCG service information of the terminal includes the MCG service information of the terminal in at least one of the M networks;

[0210] Where M is an integer greater than 1, and the M networks include the networks corresponding to the M SIM cards set by the terminal.

[0211] For example, the SCG service information of the aforementioned terminal may include at least one of the SCG service information of the first network and the SCG service information of the second network; the MCG service information of the aforementioned terminal may include at least one of the MCG service information of the first network and the MCG service information of the second network.

[0212] The following example illustrates the embodiments of this application, using a terminal equipped with a first SIM card and a second SIM card as an example:

[0213] Example 1: MCG RLF handling method during SCG deactivation in the terminal. The RRC layer determines whether to initiate the RRC reconstruction process or the MCG failure information process based on the reason for SCG deactivation and whether SCG is available.

[0214] The terminal is configured with a DC in the first network (the network corresponding to the first SIM card), where the SCG is active. The terminal wants to deactivate the SCG in the first network to use the capabilities corresponding to that SCG to handle services in the second network (the network corresponding to the second SIM card) (for example, the terminal received a paging message in the second network and wants to initiate a connection establishment in the second network). In this scenario, the primary cell group radio link failure handling method provided in this example may include the following steps:

[0215] Step S11: The terminal sends an SCG deactivation request to the first network.

[0216] Step S12: The terminal will deactivate the SCG in the first network.

[0217] Optionally, in this step, the terminal may deactivate the SCG of the first network after receiving the SCG deactivation command.

[0218] Step S13: During the deactivation of the SCG in the first network, if the terminal experiences a radio link failure in the MCG of the first network, the terminal's RRC layer initiates an RRC reconstruction procedure if at least one of the following conditions is met: the triggering reason for the deactivation of the above-mentioned SCG is related to multiple SIM cards, or the capability corresponding to the above-mentioned SCG is unavailable, for example, the capability corresponding to the SCG is occupied; otherwise, the terminal's RRC layer initiates an MCG failure information procedure or initiates an SCG activation procedure.

[0219] Example 2: MCG RLF processing method during SCG deactivation in the terminal.

[0220] The terminal is configured with a DC in the first network (the network corresponding to the first SIM card), where the SCG is active. The terminal wants to deactivate the SCG in the first network to use the capabilities corresponding to that SCG to handle services in the second network (the network corresponding to the second SIM card) (for example, the terminal received a paging message in the second network and wants to initiate a connection establishment in the second network). In this scenario, the primary cell group radio link failure handling method provided in this example may include the following steps:

[0221] Step S21: The terminal sends an SCG deactivation request to the first network.

[0222] Step S22: The terminal deactivates the SCG of the first network.

[0223] Optionally, in this step, the terminal may deactivate the SCG of the first network after receiving the SCG deactivation command.

[0224] Step S23: During the deactivation of the SCG in the first network, if the terminal experiences a wireless link failure in the MCG of the first network, the terminal initiates the MCG failure information procedure.

[0225] Step S24: The terminal's RRC layer generates an MCG failure information message and sends it to the lower layer for transmission.

[0226] Optionally, the RRC layer can request or trigger the lower layer to initiate a Random Access Channel (RACH) on the PSCell.

[0227] Step S25: If the RRC layer does not receive an acknowledgment message for the MCG failure information message from the lower layer within a certain period of time (e.g., within the second time period mentioned above), or if the RRC layer receives the fourth indication message sent by the lower layer, the RRC layer initiates the RRC reconstruction procedure. The fourth indication message can be used to indicate at least one of the following: the capability corresponding to the SCG is unavailable (e.g., the capability corresponding to the SCG is occupied) and a random access problem.

[0228] Example 3: The terminal suspends the SCG. During the SCG suspension, an MCG RLF occurs, and the terminal executes the RRC reconstruction process.

[0229] The terminal is configured with a DC in the first network (the network corresponding to the first SIM card), where the SCG is active. The terminal wants to suspend the SCG in the first network to use the capabilities corresponding to the SCG to handle services in the second network (the network corresponding to the second SIM card) (for example, the terminal receives a paging message in the second network and wants to initiate a connection establishment in the second network). In this scenario, the primary cell group radio link failure handling method provided in this example may include the following steps:

[0230] Step S31: The terminal suspends the SCG of the first network and instructs the network side that the SCG of the first network is suspended (for example, the terminal initiates the SCG failure information procedure, that is, the UE suspends the SCG and sends an SCG failure information message to the network side through the MCG, indicating the reason or type of failure as a multi-SIM purpose or a multi-SIM related reason. After receiving the message, the network side knows the specific reason for the terminal suspending the SCG and takes reasonable measures, such as not scheduling the SCG); or the terminal first sends an SCG suspension request to the first network, and suspends the SCG of the first network after receiving the SCG suspension command.

[0231] Step S32: During the SCG suspension of the first network, if the terminal experiences a radio link failure in the MCG of the first network, the terminal can directly initiate the RRC reconstruction process since the SCG of the first network is in a suspended state.

[0232] Example 4: MCG RLF handling method during SCG suspension of the terminal.

[0233] The terminal is configured with a DC in the first network (the network corresponding to the first SIM card), where the SCG is active. The terminal wants to suspend the SCG in the first network to use the capabilities corresponding to the SCG to handle services in the second network (the network corresponding to the second SIM card) (for example, the terminal receives a paging message in the second network and wants to initiate a connection establishment in the second network). In this scenario, the primary cell group radio link failure handling method provided in this example may include the following steps:

[0234] Step S41: The terminal suspends the SCG of the first network. Optionally, the terminal may suspend the SCG of the first network itself and indicate to the network side that the SCG of the first network is suspended; or it may send a request to the network side to suspend the SCG of the first network, and suspend the SCG of the first network after receiving the SCG suspension command sent by the network side.

[0235] Step S42: During the SCG suspension of the first network, if the terminal experiences a radio link failure in the MCG of the first network, the terminal may automatically resume the SCG of the first network if at least one of the following conditions is met:

[0236] The terminal's SCG suspension is triggered by multi-card related reasons, that is, the terminal's SCG suspension is not caused by SCG failure.

[0237] The terminal's SCG is in an available state; for example, the SCG of the aforementioned terminal is not occupied by other SIM cards.

[0238] The terminal meets other relevant conditions of the MCG failure information flow, such as the terminal being configured to split SRB1 or SRB3, the terminal being configured with T316 and T316 not running, and the MCG not being suspended.

[0239] The terminal SCG's TAT ​​is still running;

[0240] The terminal's SCG has dedicated RACH resources available, such as RACH resources dedicated to SCG recovery;

[0241] The terminal's service priority on the second SIM card is lower than that on the first SIM card, or the terminal's service priority on the first SIM card is a preset service type.

[0242] Step S43: After the terminal automatically restores the SCG of the first network, the terminal initiates random access or sends a scheduling request on the SCG of the first network, or sends an MCG failure information message on available uplink resources.

[0243] Optionally, the terminal can indicate to the network side whether to keep the SCG in recovery state.

[0244] Step S44: The terminal received the reconfiguration message from MN on SCG.

[0245] Example 5: MCG RLF handling method when SCG is neither suspended nor activated.

[0246] The terminal is configured with a DC in the first network (the network corresponding to the first SIM card), where the SCG is active. The terminal wants to suspend the transmission of the SCG in the first network to use the hardware / capabilities corresponding to the SCG to handle services in the second network (the network corresponding to the second SIM card) (e.g., the terminal received a paging message in the second network and wants to initiate a connection establishment in the second network). In this scenario, the primary cell group radio link failure handling method provided in this example may include the following steps:

[0247] Step S51: The terminal indicates to the network side that the SCG of the first network is unavailable. That is, the terminal only indicates the capability of the SCG to the network side, but does not change the protocol state of the terminal's SCG, that is, it does not declare that the SCG is in a deactivated state or in a suspended state.

[0248] Step S52: If the terminal experiences a wireless link failure in the MCG of the first network, and if the terminal has sent an indication that the SCG of the first network is unavailable to the network side and the unavailable state of the SCG has not been cancelled, that is, the indication that the SCG of the first network is unavailable is still valid, or if the terminal has sent an indication that the SCG of the first network is unavailable within a certain period of time before this, then the terminal initiates the RRC connection reconstruction procedure.

[0249] In summary, the main cell group radio link failure handling method provided in this application embodiment can improve the flexibility of multi-SIM terminals in handling MCG RLF problems when the SCG of the first network is in a deactivated or suspended state, and speed up the recovery of normal transmission of the first network.

[0250] It should be noted that the execution entity of the primary cell group radio link failure handling method provided in this application embodiment can be a primary cell group radio link failure handling device, or the control module in the primary cell group radio link failure handling device for executing the primary cell group radio link failure handling method. This application embodiment uses the execution of the primary cell group radio link failure handling method by the primary cell group radio link failure handling device as an example to illustrate the primary cell group radio link failure handling device provided in this application embodiment.

[0251] Please see Figure 3 , Figure 3This is a structural diagram of a primary cell group radio link failure handling device provided in an embodiment of this application, as shown below. Figure 3 As shown, the main cell group radio link failure handling device 300 includes:

[0252] The first initiation module 301 is used to initiate a radio resource control (RRC) reconstruction process or an MCG failure information process based on the first information when a radio link failure occurs in the primary cell group (MCG) of the terminal.

[0253] The first information includes at least one of the following: the secondary cell group (SCG) status of the terminal, whether the terminal has sent a first request message to the network-side device, whether the terminal has sent the status indication information of the SCG to the network-side device, whether the capability corresponding to the SCG is available, whether the terminal has sent the capability indication information corresponding to the SCG to the network-side device, the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal; the first request message is used to request control of the SCG to be in a first SCG state.

[0254] Optionally, the SCG state includes an active state, a deactivated state, or a suspended state.

[0255] Optionally, the first initiating module is specifically used for:

[0256] If the first condition is met, the RRC reconstruction process is initiated;

[0257] The first condition includes at least one of the following:

[0258] The terminal's SCG state is either suspended or deactivated.

[0259] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a suspended state or a deactivated state.

[0260] The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state or a deactivated state.

[0261] The capability corresponding to the SCG is unavailable;

[0262] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0263] The link status of the SCG did not meet the preset conditions;

[0264] The SCG was not configured with preset network resources;

[0265] The service type of the terminal does not belong to the preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0266] Optionally, the link status of the SCG does not meet the preset conditions, including at least one of the following:

[0267] The SCG's advance timer TAT has timed out or not run;

[0268] The uplink of the SCG is not synchronized;

[0269] The downlink of the SCG is not synchronized;

[0270] The link quality of the SCG is lower than a preset threshold;

[0271] No measurement results for the link quality of the SCG were found.

[0272] The SCG exhibits beam anomalies.

[0273] Optionally, the device further includes at least one of the following:

[0274] The recovery module is used to restore the SCG through the RRC layer of the terminal before initiating the Radio Resource Control (RRC) reconstruction process or the MCG failure information process based on the first information, when the SCG is in a suspended state.

[0275] The execution module is used to perform a first operation through the RRC layer of the terminal when the SCG is in a deactivated state before initiating the Radio Resource Control (RRC) reconstruction procedure or the MCG failure information procedure based on the first information. The first operation includes at least one of the following: initiating an SCG activation procedure; requesting a lower layer to initiate random access on the SCG; requesting a lower layer to send a scheduling request on the SCG.

[0276] Optionally, the first initiating module is specifically used for at least one of the following:

[0277] When the RRC layer receives the first indication information from the lower layer, the RRC layer generates an MCG failure information message, wherein the first indication information is used to indicate at least one of the following: the SCG activation is successful, the random access is successful, the scheduling request is successfully sent, the SCG activation request is successfully sent, and the random access preamble is successfully sent.

[0278] If the RRC layer does not receive the second indication information from the lower layer, or if the RRC layer receives the third indication information sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein, the second indication information is used to indicate at least one of the following: the SCG activation is successful, random access is successful, scheduling request is successfully sent, SCG activation request is successfully sent, and random access preamble is successfully sent; the third indication information is used to indicate that the SCG capability is unavailable.

[0279] Optionally, the recovery module is specifically used for:

[0280] If the second condition is met when the SCG is in a suspended state, the SCG is restored through the RRC layer of the terminal.

[0281] The second condition includes at least one of the following:

[0282] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a suspended state;

[0283] The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state;

[0284] The reason for the SCG being in a suspended state is a preset type;

[0285] The capabilities corresponding to the SCG are available;

[0286] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0287] The link status of the SCG has reached the preset condition;

[0288] The SCG is configured with preset network resources;

[0289] The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0290] Optionally, the execution module is specifically used for:

[0291] If the third condition is met when the SCG is in a deactivated state, the first operation is performed through the RRC layer of the terminal.

[0292] The third condition includes at least one of the following:

[0293] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a deactivation state;

[0294] The terminal has sent the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a deactivated state;

[0295] The trigger reason for the SCG to be in an inactive state is a preset type;

[0296] The capabilities corresponding to the SCG are available;

[0297] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0298] The link status of the SCG has reached the preset condition;

[0299] The SCG is configured with preset network resources;

[0300] The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0301] Optionally, the first initiating module is specifically used for:

[0302] When the SCG is in a deactivated state, the terminal generates an MCG failure message through its RRC layer and sends the MCG failure message to the lower layer.

[0303] Optionally, the device further includes:

[0304] The second initiation module is used to initiate the RRC reconstruction process when, in the case that the terminal's RRC layer generates an MCG failure information message and sends the MCG failure information message to the lower layer when the SCG is in a deactivated state, the RRC layer does not receive confirmation information for the MCG failure information message from the lower layer, or the RRC layer receives a fourth indication message sent by the lower layer; wherein, the fourth indication message is used to indicate that the capability of the SCG is unavailable.

[0305] Optionally, when the RRC layer requests the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information, the lower layer reports the confirmation information of the MCG failure information message or the fourth indication information to the RRC layer.

[0306] Optionally, the device further includes the following:

[0307] The first suspension module is used to suspend the SCG based on multi-SIM related reasons before the terminal initiates the Radio Resource Control (RRC) reconstruction process or the MCG failure information process according to the first information.

[0308] The second suspension module is used to suspend the SCG itself when the terminal sends indication information of the capability corresponding to the SCG to the network-side device, wherein the indication information of the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable.

[0309] The third suspension module is used to suspend the SCG based on multi-SIM related reasons and send indication information of the capability corresponding to the SCG to the network-side device.

[0310] Optionally, the device further includes at least one of the following:

[0311] The fourth suspension module is used to initiate the SCG failure information process based on multi-card related reasons before initiating the Radio Resource Control (RRC) reconstruction process or the MCG failure information process according to the first information, and to suspend the SCG itself during or after initiating the SCG failure information process.

[0312] The configuration module is used to set the failure reason value carried in the SCG failure message to be related to multiple cards during or after the SCG failure message process.

[0313] Optionally, the first condition includes the terminal sending indication information to the network-side device indicating that it has passed the capability corresponding to the SCG;

[0314] The first initiating module is specifically used for the following:

[0315] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device and the indication information of the capability corresponding to the SCG is in a valid state, the RRC reconstruction process is initiated.

[0316] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period, the RRC reconstruction process is initiated.

[0317] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period and the indication information of the capability corresponding to the SCG is in a valid state, the RRC reconstruction process is initiated.

[0318] Optionally, the service information of the terminal includes at least one of the following: the service information of the terminal's SCG, and the service information of the terminal's MCG;

[0319] The SCG service information of the terminal includes the SCG service information of the terminal in at least one of the M networks;

[0320] The MCG service information of the terminal includes the MCG service information of the terminal in at least one of the M networks;

[0321] Where M is an integer greater than 1, and the M networks include the networks corresponding to the M SIM cards set by the terminal.

[0322] The primary cell group radio link failure handling device in this application embodiment can be a device, a device or electronic device with an operating system, or a component, integrated circuit, or chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminal 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the specific type of terminal.

[0323] The main cell group radio link failure handling device provided in this application embodiment can achieve... Figure 2 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0324] Optionally, such as Figure 4 As shown, this application embodiment also provides a communication device 400, including a processor 401, a memory 402, and a program or instruction stored in the memory 402 that can be run on the processor 401. For example, when the communication device 400 is a terminal, when the program or instruction is executed by the processor 401, it implements the various processes of the above-described main cell group radio link failure handling method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0325] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is used to initiate a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on first information when a radio link failure occurs in the terminal's primary cell group (MCG). The first information includes at least one of the following: the status of the terminal's secondary cell group (SCG), whether the terminal has sent a first request message to the network-side device, whether the terminal has sent a status indication message for the SCG to the network-side device, whether the capability corresponding to the SCG is available, whether the terminal has sent an indication message for the capability corresponding to the SCG to the network-side device, the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal; the first request message is used to request control of the SCG to be in a first SCG state. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 5 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0326] The terminal 500 includes, but is not limited to, at least some of the following components: radio frequency unit 501, network module 502, audio output unit 503, input unit 504, sensor 505, display unit 506, user input unit 507, interface unit 508, memory 509, and processor 510.

[0327] Those skilled in the art will understand that the terminal 500 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 510 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 5 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0328] It should be understood that, in this embodiment, the input unit 504 may include a graphics processing unit (GPU) 5041 and a microphone 5042. The GPU 5041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 506 may include a display panel 5061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 507 includes a touch panel 5071 and other input devices 5072. The touch panel 5071 is also called a touch screen. The touch panel 5071 may include a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0329] In this embodiment, the radio frequency unit 501 receives downlink data from the network-side device and processes it for the processor 510; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 51 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0330] The memory 509 can be used to store software programs or instructions and various data. The memory 509 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 509 may include high-speed random access memory and non-volatile memory, which may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0331] Processor 510 may include one or more processing units; optionally, processor 510 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 510.

[0332] The radio frequency unit 501 is configured to initiate a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on first information when a radio link failure occurs in the primary cell group (MCG) of the terminal. The first information includes at least one of the following: the status of the secondary cell group (SCG) of the terminal; whether the terminal has sent a first request message to the network-side device; whether the terminal has sent a status indication message for the SCG to the network-side device; whether the capability corresponding to the SCG is available; whether the terminal has sent an indication message for the capability corresponding to the SCG to the network-side device; the link status of the SCG; the network resources corresponding to the SCG; and the service information of the terminal. The first request message is used to request control of the SCG to be in a first SCG state.

[0333] In this embodiment of the application, when the terminal's MCG experiences a wireless link failure, the terminal determines whether to initiate an RRC reconstruction process or an MCG failure information process based on the first information. Compared with the prior art, which directly initiates the MCG failure information process when the terminal's MCG experiences a wireless link failure, this can improve the flexibility of MCG wireless link failure handling and thus restore MCG transmission more quickly.

[0334] Optionally, the SCG state includes an active state, a deactivated state, or a suspended state.

[0335] Optionally, the radio frequency unit 501 is specifically used for:

[0336] If the first condition is met, the RRC reconstruction process is initiated;

[0337] The first condition includes at least one of the following:

[0338] The terminal's SCG state is either suspended or deactivated.

[0339] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a suspended state or a deactivated state.

[0340] The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state or a deactivated state.

[0341] The capability corresponding to the SCG is unavailable;

[0342] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0343] The link status of the SCG did not meet the preset conditions;

[0344] The SCG was not configured with preset network resources;

[0345] The service type of the terminal does not belong to the preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0346] Optionally, the link status of the SCG does not meet the preset conditions, including at least one of the following:

[0347] The SCG's advance timer TAT has timed out or not run;

[0348] The uplink of the SCG is not synchronized;

[0349] The downlink of the SCG is not synchronized;

[0350] The link quality of the SCG is lower than a preset threshold;

[0351] No measurement results for the link quality of the SCG were found.

[0352] The SCG exhibits beam anomalies.

[0353] Optionally, the processor 510 is specifically used for at least one of the following:

[0354] Before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, it restores the SCG through the terminal's RRC layer when the SCG is in a suspended state.

[0355] Before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, if the SCG is in a deactivated state, the terminal performs a first operation through its RRC layer. The first operation includes at least one of the following: initiating an SCG activation procedure; requesting a lower layer to initiate random access on the SCG; requesting a lower layer to send a scheduling request on the SCG.

[0356] Optionally, the radio frequency unit 501 is specifically used for at least one of the following:

[0357] When the RRC layer receives the first indication information from the lower layer, the RRC layer generates an MCG failure information message, wherein the first indication information is used to indicate at least one of the following: the SCG activation is successful, the random access is successful, the scheduling request is successfully sent, the SCG activation request is successfully sent, and the random access preamble is successfully sent.

[0358] If the RRC layer does not receive the second indication information from the lower layer, or if the RRC layer receives the third indication information sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein, the second indication information is used to indicate at least one of the following: the SCG activation is successful, random access is successful, scheduling request is successfully sent, SCG activation request is successfully sent, and random access preamble is successfully sent; the third indication information is used to indicate that the SCG capability is unavailable.

[0359] Optionally, the processor 510 is specifically used for:

[0360] If the second condition is met when the SCG is in a suspended state, the SCG is restored through the RRC layer of the terminal.

[0361] The second condition includes at least one of the following:

[0362] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a suspended state;

[0363] The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state;

[0364] The reason for the SCG being in a suspended state is a preset type;

[0365] The capabilities corresponding to the SCG are available;

[0366] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0367] The link status of the SCG has reached the preset condition;

[0368] The SCG is configured with preset network resources;

[0369] The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0370] Optionally, the processor 510 is specifically used for:

[0371] If the third condition is met when the SCG is in a deactivated state, the first operation is performed through the RRC layer of the terminal.

[0372] The third condition includes at least one of the following:

[0373] The terminal has sent the first request information to the network-side device, wherein the first SCG state includes a deactivation state;

[0374] The terminal has sent the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a deactivated state;

[0375] The trigger reason for the SCG to be in an inactive state is a preset type;

[0376] The capabilities corresponding to the SCG are available;

[0377] The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

[0378] The link status of the SCG has reached the preset condition;

[0379] The SCG is configured with preset network resources;

[0380] The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

[0381] Optionally, the radio frequency unit 501 is specifically used for:

[0382] When the SCG is in a deactivated state, the terminal generates an MCG failure message through its RRC layer and sends the MCG failure message to the lower layer.

[0383] Optionally, the radio frequency unit 501 is further configured to:

[0384] When the SCG is in a deactivated state, after the terminal's RRC layer generates an MCG failure message and sends the MCG failure message to the lower layer, if the RRC layer does not receive confirmation of the MCG failure message from the lower layer, or if the RRC layer receives a fourth indication message sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein, the fourth indication message is used to indicate that the SCG's capability is unavailable.

[0385] Optionally, when the RRC layer requests the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information, the lower layer reports the confirmation information of the MCG failure information message or the fourth indication information to the RRC layer.

[0386] Optionally, the processor 510 is further configured to:

[0387] Before the terminal initiates the Radio Resource Control (RRC) reconstruction process or the MCG failure information process based on the first information, the SCG is suspended due to multi-SIM related reasons.

[0388] Before the terminal initiates the Radio Resource Control (RRC) reconstruction procedure or the MCG failure information procedure based on the first information, it automatically suspends the SCG when the terminal sends the indication information of the capability corresponding to the SCG to the network-side device. The indication information of the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable.

[0389] Before initiating the Radio Resource Control (RRC) reconstruction process or the MCG failure information process based on the first information, the terminal suspends the SCG based on multi-SIM related reasons and sends indication information of the capability corresponding to the SCG to the network-side device.

[0390] Optionally, the processor 510 is specifically used for one of the following:

[0391] Before initiating the Radio Resource Control (RRC) reconstruction process or the MCG failure information process based on the first information, the SCG failure information process is initiated based on multi-card related reasons, and the SCG is automatically suspended during or after the initiation of the SCG failure information process.

[0392] Before initiating the Radio Resource Control (RRC) reconstruction procedure or the MCG failure information procedure based on the first information, or during or after initiating the SCG failure information procedure, the failure reason value carried in the SCG failure information message is set to be related to multiple cards.

[0393] Optionally, the first condition includes the terminal sending indication information to the network-side device indicating that it has passed the capability corresponding to the SCG;

[0394] The radio frequency unit 501 is specifically used for the following:

[0395] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device and the indication information of the capability corresponding to the SCG is in a valid state, the RRC reconstruction process is initiated.

[0396] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period, the RRC reconstruction process is initiated.

[0397] If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period and the indication information of the capability corresponding to the SCG is in a valid state, the RRC reconstruction process is initiated.

[0398] Optionally, the service information of the terminal includes at least one of the following: the service information of the terminal's SCG, and the service information of the terminal's MCG;

[0399] The SCG service information of the terminal includes the SCG service information of the terminal in at least one of the M networks;

[0400] The MCG service information of the terminal includes the MCG service information of the terminal in at least one of the M networks;

[0401] Where M is an integer greater than 1, and the M networks include the networks corresponding to the M SIM cards set by the terminal.

[0402] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described main cell group radio link failure handling method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0403] The processor is either the processor in the terminal described in the above embodiments or the processor in the network-side device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0404] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described main cell group radio link failure handling method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0405] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0406] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0407] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network-side device, etc.) to execute the methods described in the various embodiments of this application.

[0408] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for handling primary cell group radio link failures, characterized in that, include: In the event of a radio link failure in the terminal's primary cell group (MCG), the terminal initiates a radio resource control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information. The first information includes at least one of the following: whether the capability corresponding to the secondary cell group (SCG) of the terminal is available, and whether the terminal has sent indication information of the capability corresponding to the SCG to the network-side equipment. The terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, including: If the first condition is met, the terminal initiates the RRC reconstruction process; The first condition includes at least one of the following: The capability corresponding to the SCG is unavailable; The terminal sends indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable.

2. The method according to claim 1, characterized in that, in, The first information also includes at least one of the following: the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal.

3. The method according to claim 1, characterized in that, The terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information. include: The first condition further includes at least one of the following: The link status of the SCG did not meet the preset conditions; The SCG was not configured with preset network resources; The service type of the terminal does not belong to the preset service type, wherein the service information of the terminal includes the service type of the terminal.

4. The method according to claim 3, characterized in that, The link status of the SCG does not meet the preset conditions, including at least one of the following: The SCG's advance timer TAT has timed out or not run; The uplink of the SCG is not synchronized; The downlink of the SCG is not synchronized; The link quality of the SCG is lower than a preset threshold; No measurement results for the link quality of the SCG were found. The SCG exhibits beam anomalies.

5. The method according to claim 1, characterized in that, Before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, the method further includes at least one of the following: When the SCG is in a suspended state, the RRC layer of the terminal restores the SCG; When the SCG is in a deactivated state, the RRC layer of the terminal performs a first operation, which includes at least one of the following: initiating an SCG activation process; requesting the lower layer to initiate random access on the SCG; and requesting the lower layer to send a scheduling request on the SCG.

6. The method according to claim 5, characterized in that, The terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, including at least one of the following: When the RRC layer receives the first indication information from the lower layer, the RRC layer generates an MCG failure information message, wherein the first indication information is used to indicate at least one of the following: the SCG activation is successful, the random access is successful, the scheduling request is successfully sent, the SCG activation request is successfully sent, and the random access preamble is successfully sent. If the RRC layer does not receive the second indication information from the lower layer, or if the RRC layer receives the third indication information sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein, the second indication information is used to indicate at least one of the following: the SCG activation is successful, random access is successful, scheduling request is successfully sent, SCG activation request is successfully sent, and random access preamble is successfully sent; the third indication information is used to indicate that the SCG capability is unavailable.

7. The method according to claim 5, characterized in that, When the SCG is in a suspended state, the RRC layer of the terminal restores the SCG, including: If the second condition is met when the SCG is in a suspended state, the RRC layer of the terminal will restore the SCG. The second condition includes at least one of the following: The terminal sent a first request message to the network-side device, the first request message being used to request control of the SCG to be in a first SCG state; wherein, the first SCG state includes a suspended state; The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state; The reason for the SCG being in a suspended state is a preset type; The capabilities corresponding to the SCG are available; The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable; The link status of the SCG has reached the preset condition; The SCG is configured with preset network resources; The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

8. The method according to claim 5, characterized in that, When the SCG is in a deactivated state, the RRC layer of the terminal performs a first operation, including: If the third condition is met when the SCG is in a deactivated state, the RRC layer of the terminal will perform the first operation. The third condition includes at least one of the following: The terminal sent a first request message to the network-side device, the first request message being used to request control of the SCG to be in a first SCG state; wherein, the first SCG state includes a deactivated state; The terminal has sent the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a deactivated state; The trigger reason for the SCG to be in an inactive state is a preset type; The capabilities corresponding to the SCG are available; The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable; The link status of the SCG has reached the preset condition; The SCG is configured with preset network resources; The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

9. The method according to claim 1, characterized in that, The terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, including: When the SCG is in a deactivated state, the terminal's RRC layer generates an MCG failure message and sends the MCG failure message to the lower layer.

10. The method according to claim 9, characterized in that, When the SCG is in a deactivated state, after the terminal's RRC layer generates an MCG failure message and sends the MCG failure message to the lower layer, the method further includes: If the RRC layer does not receive confirmation of the MCG failure message from the lower layer, or if the RRC layer receives a fourth indication message sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein the fourth indication message is used to indicate that the SCG's capability is unavailable.

11. The method according to claim 10, characterized in that, When the RRC layer requests the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information, the lower layer reports the confirmation information of the MCG failure information message or the fourth indication information to the RRC layer.

12. The method according to claim 1, characterized in that, Before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, the method further includes the following: The terminal suspends the SCG due to multi-SIM related reasons; When the terminal sends indication information of the capability corresponding to the SCG to the network-side device, the terminal automatically suspends the SCG, wherein the indication information of the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable; The terminal suspends the SCG for reasons related to multiple SIM cards, and the terminal sends indication information of the capability corresponding to the SCG to the network-side device.

13. The method according to claim 1, characterized in that, Before the terminal initiates a Radio Resource Control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information, the method further includes at least one of the following: The terminal initiates an SCG failure information process based on multi-card related reasons, and automatically suspends the SCG during or after the initiation of the SCG failure information process. During or after the terminal initiates the SCG failure information process, the terminal sets the failure reason value carried in the SCG failure information message to be related to multiple cards.

14. The method according to claim 1, characterized in that, The first condition includes the terminal sending indication information to the network-side device indicating the capability corresponding to the SCG; When the first condition is met, the terminal initiates the RRC reconstruction process, which includes the following: If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device and the indication information of the capability corresponding to the SCG is in a valid state, the terminal initiates the RRC reconstruction process. If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period, the terminal initiates the RRC reconstruction process; If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period and the indication information of the capability corresponding to the SCG is in a valid state, the terminal initiates the RRC reconstruction process.

15. The method according to claim 1, characterized in that, The service information of the terminal includes at least one of the following: the service information of the terminal's SCG, and the service information of the terminal's MCG; The SCG service information of the terminal includes the SCG service information of the terminal in at least one of the M networks; The MCG service information of the terminal includes the MCG service information of the terminal in at least one of the M networks; Where M is an integer greater than 1, and the M networks include the networks corresponding to the M SIM cards set by the terminal.

16. A primary cell group radio link failure handling device, characterized in that, include: The first initiation module is used to initiate a radio resource control (RRC) reconstruction procedure or an MCG failure information procedure based on the first information when a radio link failure occurs in the primary cell group (MCG) of the terminal. The first information includes at least one of the following: whether the capability corresponding to the secondary cell group (SCG) of the terminal is available, and whether the terminal has sent indication information of the capability corresponding to the SCG to the network-side equipment. The first initiating module is specifically used for: If the first condition is met, the terminal initiates the RRC reconstruction process; The first condition includes at least one of the following: The capability corresponding to the SCG is unavailable; The terminal sends indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable.

17. The apparatus according to claim 16, characterized in that, in, The first information also includes at least one of the following: the link status of the SCG, the network resources corresponding to the SCG, and the service information of the terminal.

18. The apparatus according to claim 16, characterized in that, in, The first condition includes at least one of the following: The link status of the SCG did not meet the preset conditions; The SCG was not configured with preset network resources; The service type of the terminal does not belong to the preset service type, wherein the service information of the terminal includes the service type of the terminal.

19. The apparatus according to claim 18, characterized in that, The link status of the SCG does not meet the preset conditions, including at least one of the following: The SCG's advance timer TAT has timed out or not run; The uplink of the SCG is not synchronized; The downlink of the SCG is not synchronized; The link quality of the SCG is lower than a preset threshold; No measurement results for the link quality of the SCG were found. The SCG exhibits beam anomalies.

20. The apparatus according to claim 16, characterized in that, The device further includes at least one of the following: The recovery module is used to restore the SCG through the RRC layer of the terminal before initiating the Radio Resource Control (RRC) reconstruction process or the MCG failure information process based on the first information, when the SCG is in a suspended state. The execution module is used to perform a first operation through the RRC layer of the terminal when the SCG is in a deactivated state before initiating the Radio Resource Control (RRC) reconstruction procedure or the MCG failure information procedure based on the first information. The first operation includes at least one of the following: initiating an SCG activation procedure; requesting a lower layer to initiate random access on the SCG; requesting a lower layer to send a scheduling request on the SCG.

21. The apparatus according to claim 20, characterized in that, The first initiating module is specifically used for at least one of the following: When the RRC layer receives the first indication information from the lower layer, the RRC layer generates an MCG failure information message, wherein the first indication information is used to indicate at least one of the following: the SCG activation is successful, the random access is successful, the scheduling request is successfully sent, the SCG activation request is successfully sent, and the random access preamble is successfully sent. If the RRC layer does not receive the second indication information from the lower layer, or if the RRC layer receives the third indication information sent by the lower layer, the RRC layer initiates the RRC reconstruction process; wherein, the second indication information is used to indicate at least one of the following: the SCG activation is successful, random access is successful, scheduling request is successfully sent, SCG activation request is successfully sent, and random access preamble is successfully sent; the third indication information is used to indicate that the SCG capability is unavailable.

22. The apparatus according to claim 20, characterized in that, The recovery module is specifically used for: If the second condition is met when the SCG is in a suspended state, the SCG is restored through the RRC layer of the terminal. The second condition includes at least one of the following: The terminal sent a first request message to the network-side device, the first request message being used to request control of the SCG to be in a first SCG state; wherein, the first SCG state includes a suspended state; The terminal sends the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a suspended state; The reason for the SCG being in a suspended state is a preset type; The capabilities corresponding to the SCG are available; The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable; The link status of the SCG has reached the preset condition; The SCG is configured with preset network resources; The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

23. The apparatus according to claim 20, characterized in that, The execution module is specifically used for: If the third condition is met when the SCG is in a deactivated state, the first operation is performed through the RRC layer of the terminal. The third condition includes at least one of the following: The terminal sent a first request message to the network-side device, the first request message being used to request control of the SCG to be in a first SCG state; wherein, the first SCG state includes a deactivated state; The terminal has sent the status indication information to the network-side device, wherein the status indication information is used to indicate that the SCG is in a deactivated state; The trigger reason for the SCG to be in an inactive state is a preset type; The capabilities corresponding to the SCG are available; The terminal sends an indication information about the capability corresponding to the SCG to the network-side device, wherein the indication information about the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable; The link status of the SCG has reached the preset condition; The SCG is configured with preset network resources; The service type of the terminal belongs to a preset service type, wherein the service information of the terminal includes the service type of the terminal.

24. The apparatus according to claim 16, characterized in that, The first initiating module is specifically used for: When the SCG is in a deactivated state, the terminal generates an MCG failure message through its RRC layer and sends the MCG failure message to the lower layer.

25. The apparatus according to claim 24, characterized in that, The device further includes: The second initiation module is used to initiate the RRC reconstruction process when, in the case that the terminal's RRC layer generates an MCG failure information message and sends the MCG failure information message to the lower layer when the SCG is in a deactivated state, the RRC layer does not receive confirmation information for the MCG failure information message from the lower layer, or the RRC layer receives a fourth indication message sent by the lower layer; wherein, the fourth indication message is used to indicate that the capability of the SCG is unavailable.

26. The apparatus according to claim 25, characterized in that, When the RRC layer requests the lower layer to report the confirmation information of the MCG failure information message or the fourth indication information, the lower layer reports the confirmation information of the MCG failure information message or the fourth indication information to the RRC layer.

27. The apparatus according to claim 16, characterized in that, The device further includes the following: The first suspension module is used to suspend the SCG based on multi-SIM related reasons before the terminal initiates the Radio Resource Control (RRC) reconstruction process or the MCG failure information process according to the first information. The second suspension module is used to suspend the SCG itself when the terminal sends indication information of the capability corresponding to the SCG to the network-side device, wherein the indication information of the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable. The third suspension module is used to suspend the SCG based on multi-SIM related reasons and send indication information of the capability corresponding to the SCG to the network-side device.

28. The apparatus according to claim 16, characterized in that, The device further includes at least one of the following: The fourth suspension module is used to initiate the SCG failure information process based on multi-card related reasons before initiating the Radio Resource Control (RRC) reconstruction process or the MCG failure information process according to the first information, and to suspend the SCG itself during or after initiating the SCG failure information process. The setting module is used to set the failure reason value carried in the SCG failure information message to be related to multiple cards before initiating the Radio Resource Control (RRC) reconstruction procedure or the MCG failure information procedure based on the first information, during or after initiating the SCG failure information procedure.

29. The apparatus according to claim 16, characterized in that, The first condition includes the terminal sending indication information to the network-side device indicating the capability corresponding to the SCG; The first initiating module is specifically used for the following: If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device and the indication information of the capability corresponding to the SCG is in a valid state, the RRC reconstruction process is initiated. If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period, the RRC reconstruction process is initiated. If the terminal has sent indication information of the capability corresponding to the SCG to the network-side device within the first time period and the indication information of the capability corresponding to the SCG is in a valid state, the RRC reconstruction process is initiated.

30. The apparatus according to claim 16, characterized in that, The service information of the terminal includes at least one of the following: the service information of the terminal's SCG, and the service information of the terminal's MCG; The SCG service information of the terminal includes the SCG service information of the terminal in at least one of the M networks; The MCG service information of the terminal includes the MCG service information of the terminal in at least one of the M networks; Where M is an integer greater than 1, and the M networks include the networks corresponding to the M SIM cards set by the terminal.

31. A terminal, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the primary cell group radio link failure handling method as described in any one of claims 1 to 15.

32. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the primary cell group radio link failure handling method as described in any one of claims 1 to 15.

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