CN116367361A

CN116367361A - Method, device and terminal for processing radio link failure of primary cell group

Info

Publication number: CN116367361A
Application number: CN202111615074.2A
Authority: CN
Inventors: 蒲文娟
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2023-06-30

Abstract

The application discloses a method, a device and a terminal for processing radio link failure of a main cell group, which belong to the technical field of communication, and the method for processing radio link failure of the main cell group in the embodiment of the application comprises the following steps: under the condition that the MCG of the terminal fails in a radio link, the terminal initiates an RRC reestablishment flow or an MCG failure information flow according to the first information; wherein the first information includes at least one of: the SCG state of the terminal, whether the terminal sends first request information to the network side equipment, whether the terminal sends state indication information of the SCG to the network side equipment, whether the capability corresponding to the SCG is available, whether the terminal sends indication information of the capability corresponding to the SCG to the network side equipment, the link status of the SCG, the network resource corresponding to the SCG, and the service information of the terminal; the first request information is used for requesting to control the SCG to be in a first SCG state.

Description

Method, device and terminal for processing radio link failure of primary cell group

Technical Field

The application belongs to the technical field of communication, and particularly relates to a method, a device and a terminal for processing radio link failure of a main cell group.

Background

Currently, a User Equipment (UE) (also referred to as a terminal or a terminal device) directly initiates a primary cell group (Master Cell Group, MCG) failure information (MCG failure information) procedure when the following conditions are satisfied:

the UE is configured with a timer T316;

the UE is configured with a split signaling radio bearer (Signal Radio Bearer, SRB) 1 or SRB3;

MCG is not suspended;

the secondary cell group (Secondary Cell Group, SCG) is not suspended;

the UE detects an MCG radio link failure (Radio Link Failure, RLF) and T316 is not running at this time.

Specifically, once the UE initiates an MCG failure information procedure (which may also be referred to as a fast MCG recovery (Fast MCG recovery) procedure), the UE performs at least the steps of 1. Suspending at least part of the transmission of the MCG; 2. generating an MCG failure information message (MCGFailureInformation); 3. starting a timer T316;4. and sending the MCG failure information message to the lower layer transmission. The MCGFailureInformation message is sent to the network via the secondary cell group, specifically via SRB3 or Split SRB 1.

After receiving the MCGFailureInformation message, the network side may take a corresponding operation, for example, sending a radio resource control (Radio Resource Control, RRC) Reconfiguration message or an RRC Release (Release) message to the UE. During T316 operation, if the UE receives the Reconfiguration message of the MN (carrying the synchronization Reconfiguration parameter), T316 is stopped; if T316 times out, the UE triggers RRC reestablishment flow.

From the above, the existing MCG RLF processing method has poor flexibility, which easily results in time-consuming recovery of MCG transmission.

Disclosure of Invention

The embodiment of the application provides a method, a device and a terminal for processing radio link failure of a main cell group, which can solve the problem of poor flexibility of an MCG RLF processing mode in the prior art.

In a first aspect, a method for processing radio link failure of a primary cell group is provided, where the method includes:

under the condition that the MCG of the terminal fails in a radio link, the terminal initiates an RRC reestablishment flow or an MCG failure information flow according to the first information;

wherein the first information includes at least one of: the SCG state of the terminal, whether the terminal sends first request information to the network side equipment, whether the terminal sends state indication information of the SCG to the network side equipment, whether the capability corresponding to the SCG is available, whether the terminal sends indication information of the capability corresponding to the SCG to the network side equipment, the link status of the SCG, the network resource corresponding to the SCG, and the service information of the terminal; the first request information is used for requesting to control the SCG to be in a first SCG state.

In a second aspect, there is provided a primary cell group radio link failure processing apparatus, the apparatus comprising:

the first initiating module is used for initiating an RRC reestablishment flow or an MCG failure information flow according to the first information under the condition that the MCG of the terminal fails in a radio link;

In a third aspect, there is provided a terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to initiate an RRC reestablishment procedure or initiate an MCG failure information procedure according to first information when an MCG of the terminal fails in a radio link; wherein the first information includes at least one of: the SCG state of the terminal, whether the terminal sends first request information to the network side equipment, whether the terminal sends state indication information of the SCG to the network side equipment, whether the capability corresponding to the SCG is available, whether the terminal sends indication information of the capability corresponding to the SCG to the network side equipment, the link status of the SCG, the network resource corresponding to the SCG, and the service information of the terminal; the first request information is used for requesting to control the SCG to be in a first SCG state.

In a fifth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor realizes the steps of the method according to the first aspect.

In a sixth aspect, there is provided a chip comprising a processor and a communication interface coupled to the processor for running a program or instructions implementing the steps of the method according to the first aspect.

In a seventh aspect, there is provided a computer program or program product stored in a non-volatile storage medium, the program or program product being executable by at least one processor to perform the steps of the method according to the first aspect.

In the embodiment of the application, under the condition that the MCG of the terminal fails in radio link, the terminal determines whether to initiate the RRC reestablishment flow or initiate the MCG failure information flow according to the first information, and compared with the prior art that the MCG failure information flow is directly initiated under the condition that the MCG of the terminal fails in radio link, the method and the device can improve the flexibility of MCG radio link failure processing, and further can recover MCG transmission more rapidly.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a flowchart of a method for processing radio link failure of a primary cell group according to an embodiment of the present application;

fig. 3 is a block diagram of a primary cell group radio link failure processing apparatus according to an embodiment of the present application;

fig. 4 is a block diagram of a communication device provided in an embodiment of the present application;

fig. 5 is a block diagram of a terminal provided in an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be called a terminal Device or a User Equipment (UE), and the terminal 11 may be a terminal-side Device such as a mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a notebook (Personal Digital Assistant, PDA), a palm Computer, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and the Wearable Device includes: smart watches, bracelets, headphones, eyeglasses, etc. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may be a base station or a core network, wherein the base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

For ease of understanding, some of the matters related to the embodiments of the present application are described below:

1. dual connectivity (Dual Connectivity, DC)/carrier aggregation (Carrier Aggregation, CA)

The dual connectivity provides resources for the UE for two network nodes, one of which is called a Master Node (MN) and the other is called a Secondary Node (Secondary Node). At each network node, carrier aggregation techniques, i.e., configuring the UE with a series of serving cells controlled by the node, which constitute a Cell Group (Cell Group), may also be used. The primary node MN controls the cell group as a primary cell group (Master Cell Group, MCG) and the secondary node SN controls the secondary cell group (Secondary Cell Group, SCG). Each Cell group contains a Special Cell (SpCell) and a series of Secondary cells (scells). The special Cell is called a Primary Cell (PCell) in the MCG, and the special Cell is called a Primary secondary Cell (Primary Secondary Cell, PSCell) in the SCG.

2. SCG suspension (suspend)

SCG suspend generally refers to one of the following meanings:

suspending transmissions on the SCG;

suspending transmission of all signaling radio bearers (Signal Radio Bearer, SRB) and data radio bearers (Data Radio Bearer, DRB) on the SCG;

Suspending transmission of the SCG packet data convergence protocol (Packet Data Convergence Protocol, PDCP) and SCG radio link control (Radio Link Control, RLC) bearer (bearer);

when the SCG fails in the radio link, the UE may initiate an SCG failure information procedure (i.e. SCG failure information procedure), specifically, the UE may suspend the SCG and generate an SCG failure information message (i.e. an SCGFailureInformation message) which is sent to the network side through the MCG that is not in the suspended state.

3. SCG deactivated state

Before the seventeenth version (Rel-17), the SCG was in an active state once configured. The SCG deactivation state is introduced into Rel-17, namely, under the condition that the SCG data volume is low or the terminal is energy-saving or the terminal is overheated, the network side can control the SCG in the deactivation state, and compared with the prior method of Rel-17 (namely, releasing the SCG), the SCG deactivation state is beneficial to quickly starting data transmission on the SCG after the problems of SCG data occurrence or terminal overheating and the like are relieved.

During the SCG deactivation state, the behavior of the UE may include at least: all SCG scells are in a deactivated state, the terminal does not monitor the physical downlink control channel (Physical Downlink Shared Channel, PDCCH) of the PSCell, does not transmit an uplink shared channel (Uplink Shared Channel, UL-SCH), and does not transmit a sounding reference signal (Sounding Reference Signal, SRS).

Currently, no explicit terminal behaviour is given in the standard in case RLF occurs in the MCG and the SCG is in a deactivated state.

4. Multi-global subscriber identity module (Multiple Universal Subscriber Identity Module, multi-USIM) terminal

The above-mentioned multiple global subscriber identity module terminal may be simply referred to as a multi-card terminal. The multi-card terminal refers to a terminal in which more than one SIM card is installed. It should be noted that, in the embodiment of the present application, the meaning of the SIM card and the USIM card may be understood as the same.

Taking a dual-card terminal as an example, the dual-card terminal may be classified into a single-transmission single-reception terminal, a single-transmission dual-reception terminal, and a dual-transmission dual-reception terminal according to whether the terminal supports simultaneous transmission or reception in a network of two cards.

Single-shot single-receiving terminal: the implementation mode of the terminal (such as that the two cards share the same set of hardware or radio frequency) leads the terminal to send and receive information on the network of the two cards alternatively only in a time division mode;

single-shot double-receiving terminal: the terminal can only alternately send uplink through a time division mode on the networks of the two cards, but supports downlink reception on the networks of the two cards at the same time;

double-transmitting double-receiving terminal: the terminal supports uplink transmission and downlink reception in the network of two cards simultaneously.

5. Transient limited ability (Temporary Capability restriction)

Currently, for dual-transmit dual-receive terminals, each card uses a separate hardware module (or terminal capability) to support simultaneous transmission and reception. However, this method has problems such as low hardware utilization efficiency and high cost. To this end, the eighteenth version (Rel-18) of the third generation partnership project (3rd Generation Partnership Project,3GPP) will investigate how to support dynamic capability splitting between dual-card networks for dual-card terminals with shared portions of the hardware modules/capabilities. For example, when card a (e.g., SIM card a) is in a connected state and card B (e.g., SIM card B) is in a disconnected state, the capabilities of the terminal are occupied by card a. If the card B is about to establish or restore the RRC connection, it is necessary to cut a part of the capability of the card a to the card B, and at this time, the terminal needs to indicate a short capability limited state (i.e. a part of the capability is about to be used for other cards) to the network a (i.e. the network corresponding to the card a), otherwise, the terminal may lose the data of the network a or cause a problem of wasting network resources.

The terminal indicates to the network side a short capability limitation, which may be a state where some wireless capabilities of the terminal are not supported for a period of time, or may be a state where the terminal does not change wireless capabilities but is implemented by requesting or indicating to the network side that some functions/resources are disabled. For example, when the dual card terminal is configured with DC in the network a in the connected state, the SCG is in the active state. If the terminal is to initiate RRC connection establishment at network B (i.e., the network to which card B corresponds) at this time, the multi-card terminal may request suspension/deactivation of SCG at network a.

The embodiment of the application provides a method for processing the radio link failure of a main cell group based on the following three scenes so as to recover the MCG transmission as soon as possible.

For convenience of description, the following description will be made by taking the terminal provided with the first SIM card and the second SIM card as an example only:

scene one: the terminal may request to deactivate SCG in the first network (i.e. the network corresponding to the first SIM card) to start transceiving in the second network (i.e. the network corresponding to the second SIM card).

Scene II: to start transceiving in the second network, the terminal may request to keep the SCG in an active state in the first network but suspend the SCG transmission, it should be noted that one difference between suspending the SCG and deactivating the SCG is that some resources of the SCG may be reserved.

Scene III: the terminal is to start transceiving in the second network, the terminal does not request to change the RRC state of the SCG (i.e. neither SCG deactivation nor SCG suspension is requested), but indicates to the first network that part or all of the capabilities related to the terminal SCG are in an unavailable/limited state.

The following describes in detail the method for processing the radio link failure of the primary cell group provided in the embodiment of the present application through some embodiments and application scenarios thereof with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart of a method for processing a primary cell group radio link failure according to an embodiment of the present application, and as shown in fig. 2, the method for processing a primary cell group radio link failure according to an embodiment of the present application includes the following steps:

step 201, under the condition that the MCG of the terminal fails in radio link, the terminal initiates an RRC reestablishment procedure or initiates an MCG failure information procedure according to the first information;

In this embodiment, the terminal may be a terminal (single-card terminal) in which only one USIM card or SIM card is mounted, or a terminal (multi-card terminal) in which more than one USIM card or SIM card is mounted. For a multi-card terminal, for convenience of description, the embodiment of the present application uses a first SIM card and a second SIM card of the terminal as an example, where the first SIM card and the second SIM card may be any two SIM cards in the at least two SIM cards, a network corresponding to the first SIM card is a first network, and a network corresponding to the second SIM card is a second network, and it may be understood that the network corresponding to the SIM card may refer to a network to which the SIM card is connected or resides. The method for processing the radio link failure of the main cell group can be applied between the first SIM card and the first network of the multi-card terminal, and can also be applied between the single-card terminal and the network which is accessed or resided currently. In order to avoid redundancy, the embodiment of the present application de-emphasizes which network the primary cell group radio link failure processing method is performed in, because it is clear in which network the terminal performs the primary cell group radio link failure processing method provided in the embodiment of the present application according to the context.

The SCG status may include, but is not limited to, an activated state, a deactivated state, a suspended state, etc., and may also include a newly introduced state, such as an SCG sleep state. The suspended state of the SCG may be understood as one of the following: suspending transmissions on the SCG; suspending transmission of all SRBs and DRBs on the SCG; transmission of PDCP and SCG RLC load (bearer) of SCG is suspended. Alternatively, the SCG is in an active state or remains in a current state when the SCG is suspended.

The first request information may include, but is not limited to, an activation request, a deactivation request, a suspension request, or the like, and the corresponding first SCG state may include, but is not limited to, an activation state, a deactivation state, a suspension state, or the like. For example, if the first request information is a deactivation request, the first SCG status is a deactivation status; if the first request information is a suspension request, the first SCG state is a suspension state.

Alternatively, for a single card terminal, the terminal may trigger the transmission of the first request information to request that the SCG be in a deactivated state or in a suspended state based on power saving, no data transmission, overheating of the terminal, etc.

Alternatively, for a multi-card terminal, whether the terminal sends the first request information to the network side device may be used to reflect whether the terminal requests activation or deactivation or suspension of the SCG of the terminal for a multi-card related reason, for example, it may be agreed that the terminal can send the first request information only for a multi-card related reason (for example, only in a case where the terminal needs to process a service of the second network using the SCG capability of the first network) to request deactivation or suspension of the SCG. It should be noted that, in the embodiment of the present application, the reason related to multiple cards may also be referred to as multiple card reason.

The state indication information of the SCG is used to indicate the state of the SCG, where the state of the SCG may include, but is not limited to, an activated state, a deactivated state, a suspended state, or the like.

Optionally, for a multi-card terminal, the state indication information about whether the terminal has sent the SCG to the network side device may be used to reflect whether the terminal activates or deactivates or suspends the SCG of the terminal based on a multi-card related reason, for example, it may be agreed that the terminal only allows for self deactivation or suspension or activation of the SCG based on a multi-card related reason (for example, in a case where it is required to process a service of a second network using the SCG capability of a first network), and notify the corresponding network side of the state of the SCG.

The capability corresponding to the SCG may include at least one of a hardware capability corresponding to the SCG and a terminal capability defined by a protocol. Alternatively, the capability corresponding to the SCG may not be available, which may include that a part of the capability corresponding to the SCG is not available, that all the capability corresponding to the SCG is not available, and that a capability of a certain class or a certain granularity of the SCG is not available. Wherein the capability of a certain class or granularity of the SCG is not available, for example, a certain Frequency Range (Frequency Range) or a certain bandwidth (Band) or Carrier or Bandwidth Combination (BC) of the SCG is not available.

The above-described indication information of the capability corresponding to the SCG may be used for the related information indicating the capability corresponding to the SCG, for example, may be used for indicating whether the capability corresponding to the SCG is available or may be used for indicating at least one of capability information available and capability information unavailable in the capability corresponding to the SCG, and the like.

The link status of the SCG may include, but is not limited to, at least one of a state of a time advance timer (Time Alignment Timer, TAT) of the SCG, a link synchronization status of the SCG, a link quality of the SCG, and the like.

The network resources corresponding to the SCG may include whether the SCG is configured with a preset network resource, for example, whether the SCG is configured with a dedicated RACH resource, where the dedicated RACH resource may be a RACH resource dedicated to SCG recovery, or may be a dedicated RACH resource used for other purposes.

The service information of the terminal may include at least one of a service type, a service priority, a service quality of service (Quality of Service, qoS), and the like. The service information of the terminal may include at least one of service information of an SCG of the terminal and service information of an MCG of the terminal. For example, whether the service type of the terminal in the SCG of the first network is a preset service type, or whether the service priority of the terminal in the SCG of the first network is higher than the service priority of the terminal in the SCG of the second network, or the like.

In this embodiment, in the case that the MCG of the terminal fails in radio link, the terminal may select whether to initiate the RRC reestablishment procedure or the MCG failure information procedure according to the first information. The following is described in connection with examples.

In an alternative embodiment, if the MCG RLF occurs in the first network during the above SCG deactivation, the terminal initiates an RRC connection reestablishment procedure (hereinafter referred to as "one").

For this embodiment, if the SCG is deactivated, that is, if the single card terminal sends the SCG deactivation request to the network side, but does not yet receive the SCG deactivation command sent by the network side, if the terminal detects the MCG RLF, the terminal does not determine whether the SCG deactivation command is received or the outdated SCG deactivation command is received during the MCG failure information procedure, and the terminal initiates the RRC connection reestablishment procedure, so that the service transmission of the terminal can be recovered more quickly.

In an alternative embodiment, if the MCG RLF occurs in the first network during SCG deactivation, the RRC layer of the terminal initiates MCG failure information flow (hereinafter referred to as "second").

For this embodiment, the following three implementations may be included:

Mode one: the terminal initiates MCG failure information the procedure, i.e. the RRC layer generates MCG failure information a message, which MCG failure information message further triggers the SCG activation operation.

Mode two: the terminal initiates MCG failure information flow, the terminal initiates activation operation of SCG (for example, the RRC layer of the UE triggers a lower layer to initiate random access on the PSCell or send a scheduling request), if SCG is activated, the terminal regenerates the MCG failure information message, and if SCG activation fails, the terminal initiates RRC reestablishment flow.

Mode three: the terminal initiates an activation operation of the SCG (for example, an RRC layer of the UE triggers a lower layer to initiate random access on the PSCell or send a scheduling request), if the SCG is activated, a MCG failure information flow is initiated, and if the SCG activation fails, an RRC reestablishment flow is initiated.

In another alternative embodiment, if the RRC layer determines that the SCG is in the deactivated state for power saving purposes, the terminal initiates the SCG activation procedure. If the SCG is in a deactivated state for multi-card operation and/or the SCG is being occupied by another card, the terminal RRC layer may directly initiate the RRC reestablishment procedure.

In another alternative embodiment, the SCG may be network-side initiated or terminal initiated since it is currently in a deactivated state. If the network side initiates, it may be that no data transmission is used to deactivate SCG, and the terminal implementation is reasonable. However, if the SCG is in the deactivated state is terminal initiated, possibly because of reasons related to multi-card association, for example, the protocol agrees that the terminal can only send the SCG deactivation request under the multi-card capability limitation, and the state of the multi-card capability limitation is static or semi-static or not easily changed, when the SCG of the terminal is being occupied by another card and cannot send MCG failure information message, the terminal needs to wait until T316 times out before initiating RRC reestablishment. It is preferable that the terminal directly initiates the RRC reestablishment procedure at this time.

In another alternative embodiment, if the protocol specifies that the terminal only allows the SCG to deactivate itself or suspend or activate itself in the first case, where the first case is based on the multi-card related reason and the multi-card related reason is static or semi-static or not easily changed, and the protocol specifies that the terminal notifies the network side of the current state of the SCG, if the terminal reports to the network side that the SCG state is in the deactivated state, then the terminal cannot use the SCG to implement fast MCG recovery (Fast MCG recovery) with a high probability, so it is preferable to directly initiate the RRC reestablishment procedure.

It should be noted that, in the embodiment of the present application, the meaning of the multi-card related reason may include, but is not limited to, at least one of the following:

part or all of the terminal's capabilities are occupied by other cards;

part or all of the capabilities of the terminal cannot be normally used because of the influence on other cards or the influence of other cards;

part or all of the capabilities of the terminal are being switched between the cards, i.e. in a switched state;

some or all of the capabilities of the terminal are not available;

some or all of the capabilities of the terminal are in a restricted or disabled state.

For example, a first network of a terminal is configured with DC, wherein the SCG is in an active state, and the terminal may deactivate or suspend the SCG of the first network in case the terminal needs to process traffic of the second network using the SCG capabilities of the first network. In case of radio link failure of the MCG of the first network, the terminal may select whether to initiate the RRC reestablishment procedure or the MCG failure information procedure according to the first information.

According to the method for processing the radio link failure of the master cell group, when the MCG of the terminal fails in radio link, the terminal determines whether to initiate the RRC reestablishment flow or initiate the MCG failure information flow according to the first information, so that the judging condition of whether to initiate the MCG failure information flow or the RRC reestablishment flow when the MCG of the terminal fails in radio link in the prior art is improved, the flexibility of the MCG radio link failure processing can be improved, and MCG transmission can be recovered more quickly.

Optionally, the terminal initiates a radio resource control RRC reestablishment procedure or initiates an MCG failure information procedure according to the first information, including:

under the condition that the first condition is met, the terminal initiates the RRC reestablishment flow;

wherein the first condition includes at least one of:

the SCG state of the terminal is a suspension state or a deactivation state;

the terminal sends the first request information to network side equipment, wherein the first SCG state comprises a suspension state or a deactivation state;

the terminal sends the state indication information to network side equipment, wherein the state indication information is used for indicating that the SCG is in a suspended state or a deactivated state;

The corresponding capability of the SCG is not available;

the terminal sends indication information of the capability corresponding to the SCG to network side equipment, wherein the indication information of the capability corresponding to the SCG is used for indicating that the capability corresponding to the SCG is unavailable;

the link condition of the SCG does not reach a preset condition;

the SCG is not configured with preset network resources;

the service type of the terminal does not belong to a preset service type, wherein the service information of the terminal comprises the service type of the terminal.

In this embodiment, the link status of the SCG does not reach a preset condition, for example, the TAT of the SCG is overtime, and the link quality of the SCG is lower than a preset threshold.

The capability corresponding to the SCG is not available, and may include that a part of the capability corresponding to the SCG is not available, that all the capability corresponding to the SCG is not available, and that a capability of a certain class or a certain granularity of the SCG is not available. Wherein the capability of a certain class or granularity of the SCG is not available, for example, a certain frequency range (frequency range) or a certain bandwidth (band) or carrier (BC) of the SCG is not available.

The SCG is not configured with preset network resources, for example, the SCG is not configured with a dedicated RACH resource, where the dedicated RACH resource may be a RACH resource dedicated to SCG recovery, a RACH resource dedicated to SCG activation, or a dedicated RACH resource for other purposes.

The service type of the terminal does not belong to a preset service type, for example, the preset service type can be reasonably set according to actual requirements, for example, a service with higher importance level, a service with higher real-time requirement, or the like; or the preset service type can be predefined by a protocol; or the preset service type can be configured by the network side

Optionally, at least one of the first request information sent by the terminal to the network side device, the state indication information sent by the terminal to the network side device, and the indication information of the capability corresponding to the SCG sent by the terminal to the network side device may be used to reflect that the terminal deactivates or suspends the SCG of the terminal for multiple card related reasons.

In practical application, when the terminal deactivates or suspends the SCG due to the multi-card related reason, if the SCG is occupied for a long time due to the multi-card related reason, the terminal may directly initiate the RRC reestablishment procedure when the MCG fails in radio link, so as to avoid the SCG being occupied, which may cause that MCG failure information messages cannot be sent through the SCG, and further accelerate recovery of MCG transmission. For example, when the terminal is in an activated state in the SCG of the first network, and when the terminal needs to use the SCG capability of the first network to process the service of the second network, the terminal deactivates or suspends the SCG of the first network, and when the MCG of the first network fails in a radio link, the terminal deactivates or suspends the SCG due to multi-card correlation, so that the terminal can directly initiate an RRC reestablishment procedure in the first network to resume the MCG transmission in the first network as soon as possible.

Optionally, in this embodiment, the terminal may initiate the MCG failure information flow to resume MCG transmission as soon as possible, if the first condition is not satisfied.

Optionally, the link condition of the SCG does not reach a preset condition, including at least one of:

the time advance timer TAT of the SCG is overtime or not operated;

the uplink of the SCG is asynchronous;

the downlink of the SCG is asynchronous;

the link quality of the SCG is lower than a preset threshold;

there is no measurement of the link quality of the SCG;

beam anomalies of the SCG.

In this embodiment, the preset threshold may be set reasonably according to actual requirements, or may be agreed with a protocol, or may be configured by a network side.

Alternatively, the above measurement result of the link quality in which the SCG is not present may be a measurement result of the link quality in which the SCG is not present in effect. The beam anomalies of the SCG may include, but are not limited to, a beam failure occurring in at least one serving cell of the SCG, no beam available in at least one serving cell of the SCG, etc.

Optionally, before the terminal initiates the radio resource control RRC reestablishment procedure or initiates the MCG failure information procedure according to the first information, the method further includes at least one of:

The RRC layer of the terminal restores the SCG under the condition that the SCG is in a suspended state;

in the case that the SCG is in a deactivated state, the RRC layer of the terminal performs a first operation, the first operation including at least one of: initiating an SCG activation flow; requesting a lower layer to initiate random access on the SCG; the request lower layer sends a scheduling request on the SCG.

The above request for the lower layer to initiate random access on the SCG may be a request for the lower layer to initiate random access on the PSCell of the SCG. The request lower layer may send a scheduling request on the SCG, and the request lower layer may send a scheduling request on a PSCell of the SCG.

The lower layer may be a layer opposite to the RRC layer, for example, a MAC layer, an RLC layer, a physical layer, or the like.

In an alternative embodiment, in the case that the terminal initiates the MCG failure information procedure according to the first information, the terminal may perform the first operation before generating or transmitting the MCG failure information message.

In the case that the SCG is in the suspended state, the RRC layer of the terminal resumes the SCG, so that the terminal can send MCG failure information message based on the SCG and can receive the reconfiguration message of the MN from the SCG to resume MCG transmission as soon as possible.

In the case that the SCG is in the deactivated state, the RRC layer of the terminal performs a first operation to activate the SCG, so that the terminal can send MCG failure information message based on the SCG to resume MCG transmission as soon as possible. The RRC layer may request that the lower layer initiate random access on the SCG and request that the lower layer send a scheduling request on the SCG in order to activate the SCG.

Optionally, the RRC layer of the terminal resumes the SCG when the SCG is in a suspended state, including:

if the SCG is in a suspended state and the second condition is met, the RRC layer of the terminal recovers the SCG;

wherein the second condition includes at least one of:

the terminal sends the first request information to network side equipment, wherein the first SCG state comprises a suspension state;

the terminal sends the state indication information to network side equipment, wherein the state indication information is used for indicating that the SCG is in a suspension state;

the triggering reason that the SCG is in a suspended state is a preset type;

the corresponding capability of the SCG is available;

The link condition of the SCG reaches a 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 comprises the service type of the terminal.

It should be noted that, in the prior art, if the SCG is in the suspended state due to SCG RLF, the terminal reports the SCG failure information message through the MCG, and resumes the SCG after receiving the SCG reconfiguration at the network side. However, in the embodiment of the present application, the terminal may suspend the SCG by itself based on the multi-card related reason, since the SCG may not generate RLF at this time, and the SCG of the terminal may not be occupied by another card at this time (for example, the service of the second network ends, the terminal has not requested SCG restoration from the first network), or the SCG hardware of the terminal is occupied by another card but the terminal determines that the MCG radio link restoration priority of the first network is higher based on the implementation manner, the terminal does not need to initiate RRC reestablishment, but initiates MCG failure information procedure to restore MC as soon as possible, so the terminal may restore SCG by itself. Optionally, after the terminal recovers the SCG by itself, the terminal may notify the network side of the recovery state of the SCG. Therefore, the terminal can judge the cause of the suspension of the SCG for further processing, and flexibly process the MCG RLF.

The link status of the SCG reaches a preset condition, for example, the TAT of the SCG is not overtime, and the link quality of the SCG is not lower than a preset threshold, that is, the link quality of the SCG is higher than or equal to the preset threshold. Optionally, the link condition of the SCG reaches a preset condition, which may include at least one of the following: the TAT of the SCG is not overtime; uplink synchronization of the SCG; downlink synchronization of the SCG; and the link quality of the SCG is not lower than a preset threshold value.

The SCG is configured with preset network resources, for example, the SCG is configured with dedicated RACH resources, where the dedicated RACH resources may be RACH resources dedicated for SCG recovery.

The service type of the terminal belongs to a preset service type, for example, the service type of the terminal in the first network belongs to a preset service type. The preset service types can be reasonably set according to actual requirements, for example, services with higher importance levels, or services with higher real-time requirements, and the like; or the preset service type can be predefined by a protocol; or the preset service type may be configured by the network side.

The trigger reason for the SCG in the suspended state is a preset type, for example, the trigger reason for the SCG in the suspended state is a Multi-card related reason, for example, multi-USIM purpose (purposie).

Optionally, at least one of the first request information sent by the terminal to the network side device, the state indication information sent by the terminal to the network side device, and the indication information of the capability corresponding to the SCG sent by the terminal to the network side device may be used to reflect that the terminal suspends the SCG of the terminal for a multi-card related reason. Further, alternatively, the SCG of the present embodiment may refer to an SCG of the terminal in the first network.

In practical applications, when the terminal suspends the SCG due to the multi-card related reason, if the SCG is dynamically adjustable due to the multi-card related reason or the SCG is occupied for a short time due to the multi-card related reason, the terminal may directly recover the SCG when the MCG fails in radio link, so as to send MCG failure information message based on the recovered SCG, thereby accelerating the recovery of MCG transmission. For example, in the case that the terminal needs to process the service of the second network by using the SCG capability of the first network, the terminal suspends the SCG of the first network, and in the case that the MCG of the first network fails in radio link, the terminal suspends the SCG due to multi-card correlation, so the terminal can directly recover the SCG to send MCG failure information message based on the recovered SCG, thereby accelerating the recovery of MCG transmission.

Optionally, in this embodiment, if the SCG is in the suspended state and the second condition is not met, the terminal may initiate an RRC reestablishment procedure to resume MCG transmission as soon as possible.

Optionally, the RRC layer of the terminal performs a first operation in a case where the SCG is in a deactivated state, including:

if the SCG is in a deactivated state, the RRC layer of the terminal executes the first operation if a third condition is met;

wherein the third condition includes at least one of:

the terminal sends the first request information to network side equipment, wherein the first SCG state comprises a deactivation state;

the terminal sends the state indication information to network side equipment, wherein the state indication information is used for indicating that the SCG is in a deactivated state;

the trigger reason that the SCG is in a deactivated state is of a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

The SCG is configured with preset network resources;

It should be noted that, in the case that the reason for SCG deactivation is considered to determine whether the terminal performs RRC reestablishment or MCG failure information flow, if the reason for SCG deactivation is related to multiple cards, the terminal may initiate the MCG failure information flow; if the reason for SCG deactivation is independent of multiple cards or is a preset reason, the terminal may initiate an RRC reestablishment procedure.

The trigger of the SCG in the deactivated state is of a preset type, for example, the trigger of the SCG in the deactivated state is of a Multi-card related reason, for example, multi-USIM purpose (purpose).

Optionally, at least one of the first request information sent by the terminal to the network side device, the state indication information sent by the terminal to the network side device, and the indication information of the capability corresponding to the SCG sent by the terminal to the network side device may be used to reflect that the terminal deactivates the SCG of the terminal for multi-card related reasons. Further, alternatively, the SCG of the present embodiment may refer to an SCG of the terminal in the first network.

In practical application, when the terminal deactivates the SCG due to the multi-card related reason, if the SCG is dynamically adjustable due to the multi-card related reason or the SCG is occupied for a short time due to the multi-card related reason, the terminal may directly resume the SCG when the MCG fails in radio link, so as to send MCG failure information message based on the resumed SCG, thereby accelerating the resumption of MCG transmission. For example, in the case that the terminal needs to process the service of the second network by using the SCG capability of the first network, the terminal deactivates the SCG of the first network, and in the case that the MCG of the first network fails in radio link, the terminal deactivates the SCG due to multi-card correlation, so that the terminal can directly recover the SCG to send MCG failure information message based on the recovered SCG, thereby accelerating the recovery of MCG transmission.

Optionally, in this embodiment, if the SCG is in the deactivated state and the third condition is not met, the terminal may initiate an RRC reestablishment procedure to resume MCG transmission as soon as possible.

Optionally, the terminal initiates a radio resource control RRC reestablishment procedure or initiates an MCG failure information procedure according to the first information, including at least one of:

in the case that the RRC layer receives 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 SCG is successfully activated, 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;

the RRC layer initiates the RRC reestablishment flow when the RRC layer does not receive the second indication information from the lower layer or the RRC layer receives the third indication information sent by the lower layer; wherein the second indication information is used for indicating at least one of the following: the SCG is successfully activated, 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; the third indication information is used to indicate that the capability of the SCG is not available.

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 may indicate that the SCG activation is successful, so that the RRC layer may initiate an MCG failure information flow, that is, the RRC layer may generate an MCG failure information message and may send the MCG failure information message to the lower layer, and the lower layer may send the MCG failure information message based on the SCG, so that MCG transmission may be quickly recovered. If the RRC layer does not receive the second indication information from the lower layer or the RRC layer receives the third indication information sent by the lower layer, it may indicate that the SCG activation fails, and the RRC layer may initiate the RRC reestablishment procedure to quickly resume MCG transmission.

and under the condition that the SCG is in a deactivated state, the RRC layer of the terminal generates an MCG failure information message and sends the MCG failure information message to a lower layer.

In this embodiment, when the SCG is in a deactivated state, the RRC layer of the terminal generates an MCG failure information message, and sends the MCG failure information message to a lower layer, so as to transmit the MCG failure information message through the lower layer, thereby quickly recovering MCG transmission. Optionally, the RRC layer may also request or trigger the lower layer to initiate RACH on PSCell.

Optionally, after the RRC layer of the terminal generates an MCG failure information message and sends the MCG failure information message to a lower layer in the case where the SCG is in a deactivated state, the method further includes:

the RRC layer initiates the RRC reestablishment flow when the RRC layer does not receive the confirmation information of the MCG failure information message from the lower layer or receives fourth indication information sent by the lower layer; wherein the fourth indication information is used to indicate that the capability of the SCG is not available.

In this embodiment, the RRC layer may initiate the RRC reestablishment procedure in case of failure of the MCG failure information message transmission, so as to resume the MCG transmission as soon as possible.

In an embodiment, the RRC layer may determine whether the MCG failure information message is successfully transmitted by receiving acknowledgement (acknowledgement) of the MCG failure information message from a lower layer, for example, if the RRC layer receives acknowledgement of the MCG failure information message from the lower layer, it indicates that the MCG failure information message is successfully transmitted, and if the RRC layer does not receive acknowledgement of the MCG failure information message from the lower layer, it indicates that the MCG failure information message is failed to be transmitted.

In another embodiment, the RRC layer may determine whether the MCG failure information message is successfully transmitted by receiving the fourth indication information from the lower layer, for example, if the RRC layer receives the fourth indication information from the lower layer, it indicates that the MCG failure information message is successfully transmitted, and if the RRC layer does not receive the fourth indication information from the lower layer, it indicates that the MCG failure information message is failed to be transmitted.

Optionally, the RRC layer may initiate the RRC reestablishment procedure when the RRC layer does not receive acknowledgement information of the MCG failure information message from the lower layer in the second period of time, or when the RRC layer receives fourth indication information sent by the lower layer in the second period of time, where a starting time of the second period of time may be a time when the RRC layer generates the MCG failure information message, and a duration of the second period of time may be predefined by a protocol, may be configured by a network side device, or may be determined by a terminal.

For example, a first timer may be started after the RRC layer generates the MCG failure information message, and if the first timer times out that the RRC layer has not received an indication of MCG failure information that the message was successfully transmitted from a lower layer, the RRC layer immediately triggers the RRC reestablishment procedure; if the first timer receives the indication of successful transmission of the MCG failure information message reported by the lower layer during the operation period of the first timer, the terminal stops the first timer. The duration of the first timer may be predefined by a protocol, or may be configured by a network side device, or may be determined by a terminal.

Optionally, in the case that the RRC layer requests the lower layer to report the acknowledgement information of the MCG failure information message or the fourth indication information, the lower layer reports the acknowledgement information of the MCG failure information message or the fourth indication information to the RRC layer.

In some scenarios, the terminal requests to activate the SCG in order to recover the MCG does not need the lower layer to report the occupancy of the SCG, for example, the terminal deactivates the SCG for power saving reasons, in which case the terminal requests to activate the SCG in order to recover the MCG does not need the lower layer to report the occupancy of the SCG; in some scenarios, the terminal requests to activate the SCG in order to restore the MCG, and the lower layer needs to report the occupancy of the SCG, for example, the terminal deactivates the SCG for multi-card related reasons, in which case the terminal requests to activate the SCG in order to restore the MCG, and the lower layer needs to report the occupancy of the SCG.

Therefore, in the embodiment of the present application, when the RRC layer requests the lower layer to report the acknowledgement information or the fourth indication information of the MCG failure information message, the lower layer reports the acknowledgement information or the fourth indication information of the MCG failure information message to the RRC layer, so that resources can be saved. For example, in case that SCG deactivation is triggered by a multi-card related cause, the RRC layer may request the lower layer to report acknowledgement information of the MCG failure information message or the fourth indication information while transmitting a MCG failure information message to the lower layer.

Optionally, before the terminal initiates the radio resource control RRC reestablishment procedure or initiates the MCG failure information procedure according to the first information, the method further includes:

the terminal suspends the SCG based on a multi-card related reason;

under the condition that the terminal sends the indication information of the capability corresponding to the SCG to the network side equipment, the terminal automatically suspends the SCG, wherein the indication information of the capability corresponding to the SCG is used for indicating that the capability corresponding to the SCG is unavailable;

and the terminal suspends the SCG based on the multi-card related reason, and sends the indication information of the capability corresponding to the SCG to the network side equipment.

In an embodiment, the terminal may suspend the SCG based on a multi-card related reason, for example, in a case where the terminal needs to process a service of a second network using an SCG capability of a first network, the terminal suspends the SCG of the first network.

Optionally, the terminal may suspend the SCG by itself based on a multi-card related reason; or the terminal may send a suspension request of the SCG to the network side device based on the multi-card related reason, and suspend the SCG when receiving a suspension command sent by the network side device.

Alternatively, the terminal may initiate the SCG failure information flow based on a multi-card related reason. Optionally, the failure type is indicated in the SCG failure information message as being multi-card related.

In another embodiment, the terminal may suspend the SCG by itself when the terminal sends, to a network side device, indication information for indicating that the capability corresponding to the SCG is not available. For example, when the terminal transmits, to the network-side device, instruction information for instructing that the capability corresponding to the SCG of the first network is not available, the terminal suspends the SCG of the first network by itself.

In another embodiment, the terminal suspends the SCG based on a multi-card related reason, and the terminal sends, to the network side device, indication information of a capability corresponding to the SCG, for example, in a case where the terminal needs to process a service of the second network using the SCG capability of the first network, the terminal sends, to the network side device, indication information for indicating that the capability corresponding to the SCG of the first network is unavailable, and the terminal suspends the SCG of the first network.

Optionally, after the terminal suspends the SCG, that is, during the period that the SCG is in the suspended state, if the MCG of the terminal fails in the radio link, the terminal may initiate the RRC reestablishment procedure.

the terminal initiates an SCG failure information flow based on the multi-card related reasons, and automatically suspends the SCG in the process of initiating the SCG failure information flow or after initiating the SCG failure information flow;

and in the process of initiating the SCG failure information flow by the terminal or after the terminal, the terminal sets the failure reason value carried in the SCG failure information message to be related to multiple cards.

In an embodiment, the terminal may initiate the SCG failure information flow based on the multi-card related reason first, and suspend the SCG by itself during or after the initiation of the SCG failure information flow. For example, in the case where the terminal needs to process the traffic of the second network using the SCG capability of the first network, the terminal initiates the SCG failure information flow in the first network, and suspends the SCG in the first network by itself during or after initiating the SCG failure information flow in the first network.

In another embodiment, the terminal may initiate an SCG failure information flow, and the failure cause carried in the SCG failure information message is related to multiple cards. For example, in the case that the terminal needs to process the service of the second network using the SCG capability of the first network, the terminal initiates the SCG failure information flow in the first network, and sets the failure cause value carried in the SCG failure information message to be related to multiple cards during or after initiating the SCG failure information flow in the first network, and suspends the SCG in the first network by itself.

Optionally, the first condition includes that the terminal sends indication information of the capability corresponding to the SCG to a network side device;

the terminal initiates the RRC reestablishment procedure when the first condition is satisfied, including one of:

the terminal initiates an RRC reestablishment flow under the condition that the terminal sends the indication information of the capability corresponding to the SCG to the network side equipment and the indication information of the capability corresponding to the SCG is in an effective state;

under the condition that the terminal sends the indication information of the capability corresponding to the SCG to network side equipment in a first time period, the terminal initiates an RRC reestablishment flow;

and under the condition that the terminal sends the indication information of the capability corresponding to the SCG to the network side equipment in the first time period and the indication information of the capability corresponding to the SCG is in an effective state, the terminal initiates an RRC reestablishment flow.

In this embodiment, the duration of the first period may be predefined by a protocol, or may be configured by a network side device, or may be determined by a terminal. The end time of the first period may be a time when the MCG of the terminal fails the radio link. The indication information of the capability corresponding to the SCG is in a valid state, which may be understood that the unavailable state of the capability corresponding to the SCG is not cancelled, for example, the terminal does not send the indication information of the capability available corresponding to the SCG to the network side device, or the terminal does not send a cancellation indication to the network side device, so as to cancel the capability state indicated by the indication information of the capability corresponding to the SCG.

The embodiment can further ensure that the capability corresponding to the SCG is not available in the period of the radio link failure of the MCG, and the terminal can directly initiate the RRC reestablishment process to recover the MCG transmission as soon as possible.

Optionally, the service information of the terminal includes at least one of the following: service information of SCG of the terminal, service information of MCG of the terminal;

the service information of the SCG of the terminal comprises the service information of the SCG of the terminal in at least one network of M networks;

the service information of the MCG of the terminal comprises the service information of the MCG of the terminal in at least one network of M networks;

and M is an integer greater than 1, and the M networks comprise networks corresponding to M SIM cards set by the terminal.

For example, the service information of the SCG of the terminal may include at least one of the service information of the SCG of the first network and the service information of the SCG of the second network; the traffic information of the MCG of the terminal may include at least one of traffic information of the MCG in the first network and traffic information of the MCG in the second network.

The following exemplifies the embodiment of the present application by taking the terminal provided with the first SIM card and the second SIM card as an example:

Example one: the method for processing the MCG RLF of the terminal during the SCG deactivation comprises the step that the RRC layer judges whether to initiate an RRC reestablishment flow or a MCG failure information flow according to the reason that the SCG is deactivated and whether the SCG is available or not (available).

The terminal is configured with DC in a first network (network corresponding to the first SIM card) in which the SCG is in an active state, and the terminal wants to deactivate the SCG of the first network to process traffic of a second network (network corresponding to the second SIM card) using the capability corresponding to the SCG (e.g. the terminal has received a page in the second network, wants to initiate connection establishment in the second network). In this scenario, the method for processing radio link failure of a primary cell group provided in this example may include the following steps:

step S11, the terminal sends an SCG deactivation request to the first network.

Step S12, the terminal deactivates the SCG in said first network.

Alternatively, in this step, the terminal may deactivate the SCG of the first network after receiving the SCG deactivation command.

Step S13, during the SCG deactivation of the first network, if the terminal fails in the radio link in the MCG of the first network, the RRC layer of the terminal initiates an RRC reestablishment procedure if at least one of the following conditions is satisfied: the triggering reason of the deactivation of the SCG is related to the multi-card, and the corresponding capability of the SCG is not available, for example, the corresponding capability of the SCG is occupied; otherwise, the RRC layer of the terminal initiates MCG failure information flow or initiates SCG activation flow.

Example two: MCG RLF handling by the terminal during SCG deactivation.

step S21, the terminal sends an SCG deactivation request to the first network.

And step S22, the terminal deactivates the SCG of the first network.

In step S23, during the SCG deactivation of the first network, if the terminal fails in the radio link in the MCG of the first network, the terminal initiates a MCG failure information procedure.

In step S24, the RRC layer of the terminal generates a MCG failure information message, and sends the MCG failure information message to a lower layer (lower layer) for transmission.

Alternatively, the RRC layer may request or trigger the lower layer to initiate random access (Random Access Channel, RACH) on the PSCell.

In step S25, if the RRC layer does not receive the acknowledgement (acknowledgement) of the MCG failure information message from the lower layer within a period of time (for example, within the second period of time), or the RRC layer receives the fourth indication sent by the lower layer, the RRC layer initiates the RRC reestablishment procedure. Wherein the fourth indication information may be used to indicate at least one of an unavailable capability of the SCG (e.g., the capability of the SCG is occupied) and a random access problem.

Example three: the terminal suspends the SCG, the MCG RLF occurs during the suspension of the SCG, and the terminal performs the RRC reestablishment procedure.

The terminal is configured with DC in the first network (network corresponding to the first SIM card) where the SCG is in an active state, the terminal wants to suspend the SCG of the first network to use the capability corresponding to the SCG to process traffic of the second network (network corresponding to the second SIM card) (e.g. the terminal has received a page in the second network, wants to initiate connection establishment in the second network). In this scenario, the method for processing radio link failure of a primary cell group provided in this example may include the following steps:

step S31, the terminal suspends the SCG of the first network by itself and indicates to the network side that the SCG of the first network is suspended (e.g., the terminal initiates SCG failure information a procedure, i.e., the UE suspends the SCG by itself and sends SCG failure information a message to the network side through the MCG, where the indication failure (failure) cause or type is a multi-SIM card purpose (MSIM purpose) or a multi-card related cause, and the network side knows the specific cause of the terminal suspending the SCG after receiving and takes reasonable measures, e.g., does not schedule the SCG); or the terminal firstly sends an SCG suspension request to the first network, and after receiving the SCG suspension command, the terminal suspends the SCG of the first network.

In step S32, during the suspension period of the SCG of the first network, if the terminal fails in the radio link in the MCG of the first network, the terminal may directly initiate the RRC reestablishment procedure because the SCG of the first network is in the suspension state.

Example four: MCG RLF handling by the terminal during SCG suspension.

and step S41, the terminal suspends the SCG of the first network. Optionally, the terminal may suspend the SCG of the first network by itself and indicate to the network side that the SCG of the first network is suspended; the SCG suspension request of the first network may be sent to the network side, and after receiving the SCG suspension command sent by the network side, the SCG of the first network may be suspended.

Step S42, if the terminal fails in the radio link in the MCG of the first network during the suspension of the SCG of the first network, the terminal may restore the SCG of the first network by itself if at least one of the following conditions is satisfied:

The SCG suspension of the terminal is triggered by multi-card related reasons, i.e. the SCG suspension of the terminal is not caused by SCG failure (failure);

the SCG of the terminal is in an available state (available), for example, the SCG of the terminal is not occupied by other SIM cards;

the terminal satisfies other relevant conditions of the MCG failure information flow, for example, the terminal is configured with split SRB1 or SRB3, the terminal is configured with T316 and T316 is not running, and the MCG is not suspended.

The TAT of the terminal SCG is still running;

the terminal has available on its SCG a dedicated RACH resource, e.g. dedicated for SCG recovery;

the service priority of the terminal in the second SIM card is lower than that of the terminal in the first SIM card, or the service priority of the terminal in the first SIM card is a preset service type.

Step S43, after the terminal recovers the SCG of the first network by itself, the terminal initiates random access or sends a scheduling request on the SCG of the first network or sends MCG failure information information on available uplink resources.

Alternatively, the terminal may indicate to the network side whether to keep the SCG in the recovery state.

Step S44, the terminal receives the reconfiguration message of the MN from the SCG.

Example five: MCG RLF treatment mode without SCG suspension or deactivation.

The terminal is configured with DC in the first network (network corresponding to the first SIM card) where the SCG is in an active state, the terminal wants to suspend the transmission of the SCG of the first network for handling traffic of the second network (network corresponding to the second SIM card) using the hardware/capabilities corresponding to the SCG (e.g. the terminal has received a page in the second network, wants to initiate a connection setup in the second network). In this scenario, the method for processing radio link failure of a primary cell group provided in this example may include the following steps:

step S51, the terminal indicates to the network side that SCG of the first network is unavailable. I.e. the terminal indicates the capability of the SCG only to the network side, but no change is made to the protocol state of the SCG of the terminal, i.e. the SCG is not declared to be in a deactivated state nor in a suspended state.

Step S52, if the terminal fails in the radio link in the MCG of the first network, if the terminal sends the indication information that the SCG of the first network is unavailable to the network side and the status of the unavailable SCG is not canceled, that is, the indication information that the SCG of the first network is unavailable is still valid, or if the terminal sends the indication information that the SCG of the first network is unavailable in a period of time before the indication information, the terminal initiates the RRC connection reestablishment procedure.

As can be seen from the above, the method for processing radio link failure of the primary cell group provided by the embodiment of the present application can improve flexibility of the multi-card terminal in processing the MCG RLF problem during the period that the SCG of the first network is in the deactivated or suspended state, and accelerate the recovery of normal transmission of the terminal from the first network.

It should be noted that, in the method for processing a primary cell group radio link failure provided in the embodiments of the present application, the execution body may be a primary cell group radio link failure processing device, or a control module in the primary cell group radio link failure processing device configured to execute the method for processing a primary cell group radio link failure. In the embodiment of the present application, an example of a method for executing a primary cell group radio link failure processing method by a primary cell group radio link failure processing device is described.

Referring to fig. 3, fig. 3 is a block diagram of a primary cell group radio link failure processing apparatus according to an embodiment of the present application, and as shown in fig. 3, a primary cell group radio link failure processing apparatus 300 includes:

a first sending module 301, configured to send a radio resource control RRC reestablishment procedure or an MCG failure information procedure according to first information when a radio link failure occurs in a primary cell group MCG of a terminal;

Wherein the first information includes at least one of: the method comprises the steps that a Secondary Cell Group (SCG) state of a terminal is judged, whether the terminal sends first request information to network side equipment or not, whether the terminal sends state indication information of the SCG to the network side equipment or not, whether the capability corresponding to the SCG is available or not, whether the terminal sends indication information of the capability corresponding to the SCG to the network side equipment or not, the link condition of the SCG, network resources corresponding to the SCG and service information of the terminal; the first request information is used for requesting to control the SCG to be in a first SCG state.

Optionally, the SCG state includes an activated state, a deactivated state, or a suspended state.

Optionally, the first starting module is specifically configured to:

under the condition that the first condition is met, initiating the RRC reestablishment flow;

wherein the first condition includes at least one of:

the SCG state of the terminal is a suspension state or a deactivation state;

The corresponding capability of the SCG is not available;

the link condition of the SCG does not reach a preset condition;

the SCG is not configured with preset network resources;

the time advance timer TAT of the SCG is overtime or not operated;

the uplink of the SCG is asynchronous;

the downlink of the SCG is asynchronous;

the link quality of the SCG is lower than a preset threshold;

there is no measurement of the link quality of the SCG;

beam anomalies of the SCG.

Optionally, the apparatus further comprises at least one of:

a recovery module, configured to recover, by an RRC layer of the terminal, the SCG in a suspended state before initiating a radio resource control RRC reestablishment procedure or initiating an MCG failure information procedure according to the first information;

An execution module, configured to execute, by an RRC layer of the terminal, a first operation before initiating a radio resource control RRC reestablishment procedure or initiating an MCG failure information procedure according to the first information, where the SCG is in a deactivated state, where the first operation includes at least one of: initiating an SCG activation flow; requesting a lower layer to initiate random access on the SCG; the request lower layer sends a scheduling request on the SCG.

Optionally, the first starting module is specifically configured to at least one of the following:

generating, by the RRC layer, an MCG failure information message in case the RRC layer receives first indication information from the lower layer, wherein the first indication information is used to indicate at least one of: the SCG is successfully activated, 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;

initiating the RRC reestablishment flow through the RRC layer when the RRC layer does not receive the second indication information from the lower layer or the RRC layer receives the third indication information sent by the lower layer; wherein the second indication information is used for indicating at least one of the following: the SCG is successfully activated, 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; the third indication information is used to indicate that the capability of the SCG is not available.

Optionally, the recovery module is specifically configured to:

if the SCG is in a suspended state and the second condition is met, recovering the SCG through an RRC layer of the terminal;

wherein the second condition includes at least one of:

the triggering reason that the SCG is in a suspended state is a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

Optionally, the execution module is specifically configured to:

if a third condition is satisfied in the case that the SCG is in a deactivated state, performing the first operation through an RRC layer of the terminal;

Wherein the third condition includes at least one of:

the trigger reason that the SCG is in a deactivated state is of a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

Optionally, the first starting module is specifically configured to:

and under the condition that the SCG is in a deactivated state, generating an MCG failure information message through an RRC layer of the terminal, and sending the MCG failure information message to a lower layer.

Optionally, the apparatus further comprises:

The second initiating module is configured to generate, by the RRC layer of the terminal, an MCG failure information message when the SCG is in a deactivated state, and send the MCG failure information message to a lower layer, and initiate, by the RRC layer, the RRC reestablishment procedure when the RRC layer does not receive acknowledgement information of the MCG failure information message from the lower layer, or when the RRC layer receives fourth indication information sent by the lower layer; wherein the fourth indication information is used to indicate that the capability of the SCG is not available.

Optionally, the apparatus further comprises one of:

the first suspension module is used for suspending the SCG based on a multi-card related reason before the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information;

the second suspension module is configured to suspend the SCG by itself when the terminal sends, to the network side device, the indication information of the capability corresponding to the SCG, where the indication information of the capability corresponding to the SCG is used to indicate that the capability corresponding to the SCG is unavailable;

And the third suspending module is used for suspending the SCG based on the multi-card related reasons and sending the indication information of the capability corresponding to the SCG to the network side equipment.

Optionally, the apparatus further comprises at least one of:

a fourth suspension module, configured to initiate an SCG failure information flow based on a multi-card related reason before initiating a radio resource control RRC reestablishment flow or an MCG failure information flow according to the first information, and suspend the SCG automatically during or after initiating the SCG failure information flow;

and the setting module is used for setting the failure reason value carried in the SCG failure information message to be related to the multiple cards in the process of initiating the SCG failure information flow or after initiating the SCG failure information flow.

the first starting module is specifically configured to:

initiating an RRC reestablishment flow under the condition that the terminal sends the indication information of the capability corresponding to the SCG to the network side equipment and the indication information of the capability corresponding to the SCG is in an effective state;

under the condition that the terminal sends the indication information of the capability corresponding to the SCG to network side equipment in a first time period, initiating an RRC reestablishment flow;

And under the condition that the terminal sends the indication information of the capability corresponding to the SCG to the network side equipment in the first time period and the indication information of the capability corresponding to the SCG is in an effective state, initiating an RRC reestablishment flow.

The radio link failure processing device of the primary cell group in the embodiment of the present application may be a device, a device with an operating system or an electronic device, or may be a component, an integrated circuit, or a chip in a terminal. The apparatus or electronic device may be a mobile terminal or a non-mobile terminal. By way of example, mobile terminals may include, but are not limited to, the types of terminals 11 listed above, and non-mobile terminals may be servers, network attached storage (Network Attached Storage, NAS), personal computers (personal computer, PCs), televisions (TVs), teller machines, self-service machines, etc., and embodiments of the present application are not limited in detail.

The radio link failure processing device of the primary cell group provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, so that repetition is avoided, and no detailed description is given here.

Optionally, as shown in fig. 4, the embodiment of the present application further provides a communication device 400, including a processor 401, a memory 402, and a program or an instruction stored in the memory 402 and capable of running on the processor 401, for example, when the communication device 400 is a terminal, the program or the instruction is executed by the processor 401 to implement each process of the above embodiment of the method for processing a radio link failure of a primary cell group, and the same technical effects can be achieved, so that repetition is avoided and detailed description is omitted herein.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for initiating a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to first information when a Main Cell Group (MCG) of the terminal fails in a radio link; wherein the first information includes at least one of: the method comprises the steps that a Secondary Cell Group (SCG) state of a terminal is judged, whether the terminal sends first request information to network side equipment or not, whether the terminal sends state indication information of the SCG to the network side equipment or not, whether the capability corresponding to the SCG is available or not, whether the terminal sends indication information of the capability corresponding to the SCG to the network side equipment or not, the link condition of the SCG, network resources corresponding to the SCG and service information of the terminal; the first request information is used for requesting to control the SCG to be in a first SCG state. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the terminal embodiment and can achieve the same technical effects. Specifically, fig. 5 is a schematic hardware structure of a terminal for implementing an embodiment of the present application.

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

Those skilled in the art will appreciate that the terminal 500 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically coupled to the processor 510 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 5 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 504 may include a graphics processor (Graphics Processing Unit, GPU) 5041 and a microphone 5042, with the graphics processor 5041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 506 may include a display panel 5061, and the display panel 5061 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. Touch panel 5071, also referred to as a touch screen. Touch panel 5071 may include two parts, a touch detection device and a touch controller. Other input devices 5072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from a network side device, the radio frequency unit 501 processes the downlink data with the processor 510; in addition, the uplink data is sent to the network side equipment. 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, and the like.

The memory 509 may be used to store software programs or instructions as well as various data. The memory 509 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 509 may include a high-speed random access Memory, and may also include a nonvolatile Memory, wherein the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable EPROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.

Processor 510 may include one or more processing units; alternatively, the processor 510 may integrate an application processor that primarily processes operating systems, user interfaces, and applications or instructions, etc., with a modem processor that primarily processes wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 510.

The radio frequency unit 501 is configured to initiate a radio resource control RRC reestablishment procedure or initiate an MCG failure information procedure according to the first information when a radio link failure occurs in a primary cell group MCG of the terminal; wherein the first information includes at least one of: the method comprises the steps that a Secondary Cell Group (SCG) state of a terminal is judged, whether the terminal sends first request information to network side equipment or not, whether the terminal sends state indication information of the SCG to the network side equipment or not, whether the capability corresponding to the SCG is available or not, whether the terminal sends indication information of the capability corresponding to the SCG to the network side equipment or not, the link condition of the SCG, network resources corresponding to the SCG and service information of the terminal; the first request information is used for requesting to control the SCG to be in a first SCG state.

According to the embodiment of the invention, under the condition that the MCG of the terminal fails in radio link, the terminal determines whether to initiate the RRC reestablishment flow or initiate the MCG failure information flow according to the first information, and compared with the prior art that the MCG failure information flow is directly initiated under the condition that the MCG of the terminal fails in radio link, the method and the device can improve the flexibility of MCG radio link failure processing, and further recover MCG transmission more rapidly.

Optionally, the radio frequency unit 501 is specifically configured to:

wherein the first condition includes at least one of:

the SCG state of the terminal is a suspension state or a deactivation state;

the corresponding capability of the SCG is not available;

The link condition of the SCG does not reach a preset condition;

the SCG is not configured with preset network resources;

the time advance timer TAT of the SCG is overtime or not operated;

the uplink of the SCG is asynchronous;

the downlink of the SCG is asynchronous;

the link quality of the SCG is lower than a preset threshold;

there is no measurement of the link quality of the SCG;

beam anomalies of the SCG.

Optionally, the processor 510 is specifically configured to at least one of:

before the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, under the condition that the SCG is in a suspended state, recovering the SCG through an RRC layer of the terminal;

before the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, under the condition that the SCG is in a deactivated state, executing a first operation by an RRC layer of the terminal, wherein the first operation comprises at least one of the following steps: initiating an SCG activation flow; requesting a lower layer to initiate random access on the SCG; the request lower layer sends a scheduling request on the SCG.

Optionally, the radio frequency unit 501 is specifically configured to at least one of the following:

Optionally, the processor 510 is specifically configured to:

Wherein the second condition includes at least one of:

the triggering reason that the SCG is in a suspended state is a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

Optionally, the processor 510 is specifically configured to:

wherein the third condition includes at least one of:

the trigger reason that the SCG is in a deactivated state is of a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

Optionally, the radio frequency unit 501 is specifically configured to:

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

the RRC layer of the terminal generates an MCG failure information message when the SCG is in a deactivated state, and after the MCG failure information message is sent to a lower layer, the RRC layer initiates the RRC reestablishment flow when the RRC layer does not receive confirmation information of the MCG failure information message from the lower layer or the RRC layer receives fourth indication information sent by the lower layer; wherein the fourth indication information is used to indicate that the capability of the SCG is not available.

Optionally, the processor 510 is further configured to:

before the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, suspending the SCG based on a multi-card related reason;

before the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, the terminal automatically hangs up the SCG under the condition that the terminal sends the indication information of the capability corresponding to the SCG to network side equipment, wherein the indication information of the capability corresponding to the SCG is used for indicating that the capability corresponding to the SCG is unavailable;

before the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, suspending the SCG based on a multi-card related reason, and sending the indication information of the corresponding capability of the SCG to the network side equipment.

Optionally, the processor 510 is specifically configured to one of:

Before initiating a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, initiating the SCG failure information flow based on a multi-card related reason, and automatically suspending the SCG during or after initiating the SCG failure information flow;

before initiating a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information, setting a failure cause value carried in an SCG failure information message to be related to multiple cards in the process of initiating the SCG failure information flow or after initiating the SCG failure information flow.

the radio frequency unit 501 is specifically configured to:

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the processes of the embodiment of the radio link failure processing method of the primary cell group are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The processor is a processor in the terminal described in the above embodiment, or a processor in the network side device described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is configured to run a program or an instruction, implement each process of the above embodiment of the primary cell group radio link failure processing method, and achieve the same technical effect, so that repetition is avoided, and no further description is provided herein.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network side device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A method for processing radio link failure of a primary cell group, comprising:

under the condition that a main cell group MCG of a terminal fails in a radio link, the terminal initiates a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to first information;

2. The method of claim 1, wherein the SCG status comprises an active state, a deactivated state, or a suspended state.

3. The method according to claim 1, wherein the terminal initiates a radio resource control RRC reestablishment procedure or initiates an MCG failure information procedure according to the first information, comprising:

wherein the first condition includes at least one of:

the SCG state of the terminal is a suspension state or a deactivation state;

the corresponding capability of the SCG is not available;

the link condition of the SCG does not reach a preset condition;

the SCG is not configured with preset network resources;

4. A method according to claim 3, wherein the link condition of the SCG does not reach a preset condition, comprising at least one of:

The time advance timer TAT of the SCG is overtime or not operated;

the uplink of the SCG is asynchronous;

the downlink of the SCG is asynchronous;

the link quality of the SCG is lower than a preset threshold;

there is no measurement of the link quality of the SCG;

beam anomalies of the SCG.

5. The method according to claim 1, wherein before the terminal initiates the radio resource control, RRC, reestablishment procedure or initiates the MCG failure information procedure according to the first information, the method further comprises at least one of:

6. The method of claim 5, wherein the terminal initiates a radio resource control, RRC, reestablishment procedure or initiates an MCG failure information procedure according to the first information, comprising at least one of:

7. The method of claim 5, wherein the RRC layer of the terminal resumes the SCG if the SCG is in a suspended state, comprising:

wherein the second condition includes at least one of:

The triggering reason that the SCG is in a suspended state is a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

8. The method of claim 5, wherein the RRC layer of the terminal performs a first operation with the SCG in a deactivated state, comprising:

wherein the third condition includes at least one of:

The trigger reason that the SCG is in a deactivated state is of a preset type;

the corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

9. The method according to claim 1, wherein the terminal initiates a radio resource control RRC reestablishment procedure or initiates an MCG failure information procedure according to the first information, comprising:

10. The method of claim 9, wherein the RRC layer of the terminal generates an MCG failure information message in a case where the SCG is in a deactivated state, and transmits the MCG failure information message to a lower layer, the method further comprising:

11. The method of claim 10, wherein the lower layer reports the acknowledgement information or the fourth indication information of the MCG failure information message to the RRC layer in case the RRC layer requests the lower layer to report the acknowledgement information or the fourth indication information of the MCG failure information message.

12. The method according to claim 1, wherein before the terminal initiates the radio resource control RRC reestablishment procedure or initiates the MCG failure information procedure according to the first information, the method further comprises one of:

the terminal suspends the SCG based on a multi-card related reason;

13. The method according to claim 1, wherein before the terminal initiates the radio resource control, RRC, reestablishment procedure or initiates the MCG failure information procedure according to the first information, the method further comprises at least one of:

14. The method of claim 3, wherein the first condition includes that the terminal sends, to a network side device, indication information of a capability corresponding to the SCG;

15. The method of claim 1, wherein the service information of the terminal comprises at least one of: service information of SCG of the terminal, service information of MCG of the terminal;

16. A primary cell group radio link failure handling apparatus, comprising:

the first initiating module is used for initiating a Radio Resource Control (RRC) reestablishment flow or an MCG failure information flow according to the first information under the condition that the primary cell group (MCG) of the terminal fails in radio link;

17. The apparatus of claim 16, wherein the SCG status comprises an activated state, a deactivated state, or a suspended state.

18. The apparatus of claim 16, wherein the first initiation module is specifically configured to:

wherein the first condition includes at least one of:

the SCG state of the terminal is a suspension state or a deactivation state;

the corresponding capability of the SCG is not available;

the link condition of the SCG does not reach a preset condition;

the SCG is not configured with preset network resources;

19. The apparatus of claim 18, wherein the SCG has a link condition that does not meet a preset condition, comprising at least one of:

the time advance timer TAT of the SCG is overtime or not operated;

the uplink of the SCG is asynchronous;

the downlink of the SCG is asynchronous;

the link quality of the SCG is lower than a preset threshold;

there is no measurement of the link quality of the SCG;

beam anomalies of the SCG.

20. The apparatus of claim 16, wherein the apparatus further comprises at least one of:

21. The apparatus of claim 20, wherein the first initiation module is specifically configured to at least one of:

22. The apparatus of claim 20, wherein the recovery module is specifically configured to:

wherein the second condition includes at least one of:

the triggering reason that the SCG is in a suspended state is a preset type;

The corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

23. The apparatus according to claim 20, wherein the execution module is specifically configured to:

wherein the third condition includes at least one of:

the trigger reason that the SCG is in a deactivated state is of a preset type;

The corresponding capability of the SCG is available;

the link condition of the SCG reaches a preset condition;

the SCG is configured with preset network resources;

24. The apparatus of claim 16, wherein the first initiation module is specifically configured to:

25. The apparatus of claim 24, wherein the apparatus further comprises:

26. The apparatus of claim 25, wherein the lower layer reports the acknowledgement information or the fourth indication information of the MCG failure information message to the RRC layer if the RRC layer requests the lower layer to report the acknowledgement information or the fourth indication information of the MCG failure information message.

27. The apparatus of claim 16, wherein the apparatus further comprises one of:

28. The apparatus of claim 16, wherein the apparatus further comprises at least one of:

the setting module is configured to set a failure cause value carried in the SCG failure information message to be related to the multiple cards during or after the SCG failure information flow is initiated before the radio resource control RRC reestablishment flow is initiated or the MCG failure information flow is initiated according to the first information.

29. The apparatus of claim 18, wherein the first condition includes that the terminal sends, to a network side device, indication information of a capability corresponding to the SCG;

the first starting module is specifically configured to:

30. The apparatus of claim 16, wherein the service information of the terminal comprises at least one of: service information of SCG of the terminal, service information of MCG of the terminal;

31. A terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which when executed by the processor implements the steps of the primary cell group radio link failure handling method of any of claims 1 to 15.

32. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the primary cell group radio link failure handling method of any of claims 1 to 15.