WO2022205374A1

WO2022205374A1 - Radio link failure processing method and apparatus, and communication device

Info

Publication number: WO2022205374A1
Application number: PCT/CN2021/085103
Authority: WO
Inventors: 王淑坤
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2022-10-06
Also published as: CN116636299A

Abstract

Provided in the embodiments of the present application are a radio link failure processing method and apparatus, and a communication device. The method comprises: a terminal device determining that an MCG radio link failure occurs when an SCG is in a deactivated state; and the terminal device triggering an MCG RRC connection re-establishment process or an MCG fast recovery process.

Description

A method and apparatus for handling wireless link failure, and communication equipment

technical field

The embodiments of the present application relate to the field of mobile communication technologies, and in particular, to a method and apparatus for handling wireless link failure, and a communication device.

Background technique

In the case of a radio link failure in the master cell group (Master Cell Group, MCG), the MCG can be quickly recovered through the link on the secondary cell group (Secondary Cell Group, SCG) side. However, the SCG can be in the active state or in the deactivated state. If the SCG is in the deactivated state, in the event of a wireless link failure of the MCG, the terminal device cannot quickly recover the MCG through the link on the SCG side. How to perform the MCG Recovery is a problem that needs to be solved.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method, an apparatus, and a communication device for handling wireless link failure.

The method for handling wireless link failure provided by the embodiment of the present application includes:

The terminal device determines that an MCG radio link failure has occurred while the SCG is in a deactivated state;

The terminal device triggers a radio resource control (Radio Resource Control, RRC) connection reestablishment process of the MCG or a fast recovery process of the MCG.

The terminal device determines that an MCG wireless link failure has occurred;

The terminal device sends a first message to the SCG and starts a first timer, where the first message is used to trigger a fast recovery process of the MCG;

If the terminal device receives an SCG deactivation command before the first timer expires, the terminal device triggers an RRC connection re-establishment process.

The apparatus for handling wireless link failure provided by the embodiment of the present application is applied to terminal equipment, and the apparatus includes:

a determining unit, configured to determine that an MCG radio link failure occurs when the SCG is in a deactivated state;

The communication unit is used to trigger the RRC connection reestablishment process of the MCG or the fast recovery process of the MCG.

a determining unit, used for determining that the MCG wireless link failure has occurred;

a communication unit, configured to send a first message to the SCG, where the first message is used to trigger a fast recovery process of the MCG;

a control unit, configured to start a first timer after the communication unit sends the first message to the SCG;

The communication unit is further configured to trigger an RRC connection re-establishment process if the SCG deactivation command is received before the first timer expires.

The communication device provided by the embodiments of the present application includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the above-mentioned method for dealing with a wireless link failure.

The chip provided by the embodiment of the present application is used to implement the above-mentioned method for processing a wireless link failure.

Specifically, the chip includes: a processor for invoking and running a computer program from the memory, so that the device installed with the chip executes the above-mentioned method for handling wireless link failure.

The computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute the above-mentioned method for processing a wireless link failure.

The computer program product provided by the embodiments of the present application includes computer program instructions, and the computer program instructions cause a computer to execute the above-mentioned method for processing a wireless link failure.

The computer program provided by the embodiments of the present application, when running on a computer, enables the computer to execute the above-mentioned method for processing a wireless link failure.

Through the above technical solutions, on the one hand, in the case of MCG wireless link failure, if the SCG is in the deactivated state, the terminal device directly initiates the RRC connection reestablishment process or initiates the random access process to the SCG, and then performs the MCG based on the SCG. Fast recovery, thus realizing MCG RRC connection reestablishment or fast MCG recovery. On the other hand, in the case of MCG wireless link failure, if the terminal device receives the SCG deactivation command during the operation of the first timer corresponding to the MCG fast recovery, the terminal device initiates the RRC connection re-establishment process, thereby realizing RRC connection re-establishment of MCG.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

2 is a schematic flowchart of an RRC connection reestablishment process provided by an embodiment of the present application;

3 is a schematic diagram of triggering a fast MCG recovery process using Split SRB1 on the SCG side provided by an embodiment of the present application;

4 is a schematic diagram of triggering a fast MCG recovery process using SRB3 on the SCG side provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart 1 of a method for handling a wireless link failure provided by an embodiment of the present application;

FIG. 6 is a second schematic flowchart of a method for handling a wireless link failure provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram 1 of an apparatus for processing a wireless link failure provided by an embodiment of the present application;

FIG. 8 is a schematic diagram 2 of the structure and composition of an apparatus for processing a wireless link failure provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a chip according to an embodiment of the present application;

FIG. 11 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex) , TDD), systems, 5G communication systems or future communication systems, etc.

Exemplarily, a communication system 100 to which this embodiment of the present application is applied is shown in FIG. 1 . The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or referred to as a communication terminal, a terminal). The network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Optionally, the network device 110 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the The network device can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future communication system.

The communication system 100 also includes at least one terminal 120 located within the coverage of the network device 110 . "Terminal" as used herein includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connections; and/or another data connection/network; and/or via a wireless interface, e.g. for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM A broadcast transmitter; and/or a device of another terminal configured to receive/transmit a communication signal; and/or an Internet of Things (IoT) device. A terminal arranged to communicate through a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communications capabilities; may include radio telephones, pagers, Internet/Intranet PDAs with networking access, web browsers, memo pads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or others including radiotelephone transceivers electronic device. A terminal may refer to an access terminal, user equipment (UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks or terminals in future evolved PLMNs, etc.

Optionally, direct terminal (Device to Device, D2D) communication may be performed between the terminals 120 .

Optionally, the 5G communication system or the 5G network may also be referred to as a new radio (New Radio, NR) system or an NR network.

FIG. 1 exemplarily shows one network device and two terminals. Optionally, the communication system 100 may include multiple network devices, and the coverage of each network device may include other numbers of terminals. This embodiment of the present application This is not limited.

Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal 120 with a communication function, and the network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here; The device may further include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the following describes the technical solutions related to the embodiments of the present application.

With people's pursuit of speed, delay, high-speed mobility, energy efficiency, and the diversity and complexity of services in future life, the ^3rd Generation Partnership Project (3GPP) international standards organization began to develop 5G . The main application scenarios of 5G are: Enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), Massive Machine-Type Communications (mMTC) ).

On the one hand, eMBB still aims at users' access to multimedia content, services and data, and its demand is growing rapidly. On the other hand, since eMBB may be deployed in different scenarios, such as indoor, urban, rural, etc., its capabilities and requirements are also quite different, so it cannot be generalized and must be analyzed in detail in combination with specific deployment scenarios. Typical applications of URLLC include: industrial automation, power automation, telemedicine operations (surgery), traffic safety assurance, etc. Typical features of mMTC include: high connection density, small data volume, latency-insensitive services, low cost and long service life of the module.

In the early deployment of NR, complete NR coverage is difficult to obtain, so typical network coverage is wide-area LTE coverage and NR island coverage mode. And a lot of LTE is deployed in sub-6GHz, and there is very little sub-6GHz spectrum available for 5G. Therefore, NR must study the spectrum application above 6GHz, while the high frequency band has limited coverage and fast signal fading. At the same time, in order to protect the early investment of mobile operators in LTE, a working mode of tight interworking between LTE and NR is proposed.

In order to realize 5G network deployment and commercial application as soon as possible, 3GPP will first complete the first 5G version before the end of December 2017, namely E-UTRA and NR Dual Connectivity (E-UTRA-NR Dual Connectivity, EN-DC). In EN-DC, an LTE base station (eNB) acts as a master node (Master Node, MN), and an NR base station (gNB or en-gNB) acts as a secondary node (Secondary Node, SN). The MN is mainly responsible for the RRC control function and the control plane leading to the core network; the SN can configure auxiliary signaling, such as SRB3, which mainly provides the data transmission function.

Later in R15, other Dual Connectivity (DC) modes will be supported, namely NR and E-UTRA Dual Connectivity (NE-DC), 5GC-EN-DC, NR DC. For EN-DC, the core network connected to the access network is the Evolved Packet Core network (EPC), while the core network connected to other DC modes is the 5G Core Network (5GC).

In R15, the RRC connection re-establishment process will be triggered when the MCG has a radio link failure (also referred to as MCG failure) and other issues. Referring to Figure 2, Figure 2 shows a schematic flowchart of the RRC connection re-establishment process, including the following steps :

Step 201: The terminal device sends an RRC connection reestablishment request message to the network.

Step 202: The network sends an RRC connection reestablishment message to the terminal device.

Step 203: The terminal device sends an RRC connection reestablishment complete message to the network.

It should be noted that the "RRC connection reestablishment request message" may also be referred to as an "RRC reestablishment request message (RRCReestablishmentRequest)".

It should be noted that the "RRC connection reestablishment message" may also be referred to as an "RRC reestablishment message (RRCReestablishment)".

It should be noted that the "RRC connection reestablishment complete message" may also be referred to as an "RRC reestablishment complete message (RRCReestablishmentComplete)".

Table 1 below shows the content carried in the RRC connection reestablishment request message. The RRC connection reestablishment request message carries a reestablishment cause (ReestablishmentCause). In addition, the RRC connection re-establishment request message also carries the following contents: Cell-Radio Network Temporary Identifier (C-RNTI), Physical Cell Identity (PCI), and Short Message Authentication Code (short Message) Authentication Code-Integrity, shortMAC-I). also,

Table 1

Considering the scenario where the MCG fails and the signal on the SCG side is good, in order to avoid the RRC connection re-establishment in this scenario and reduce the service interruption, the fast MCG recovery (fast MCG recovery) function is introduced in R16. That is, when the wireless link fails in the MCG, the terminal device sends MCG failure information (MCGFailureInformation) through the link on the SCG side, triggering the network side to quickly restore the link on the MCG side.

It should be pointed out that MCG fast recovery can be triggered if and only when the AS is safely activated and at least one SRB in SRB2 and split SRB1 is established. MCG failure information can be sent through Split SRB1 or SRB3 on the SCG side. Only when Split SRB1 is not configured and SRB3 is configured, MCGFailureInformation will be reported using SRB3.

After the terminal device sends the MCGFailureInformation, it starts the Guard timer (ie T316) and waits for the network side to respond. The message that the network side responds to can be: a synchronous reconfiguration (reconfiguration with sync) or an RRC release (RRC Release) message. If the terminal device receives the response message, the terminal device stops the Guard timer. If the Guard timer expires, the terminal device triggers the RRC connection re-establishment process, and the re-establishment reason value in the RRC connection re-establishment request is filled with "otherFailure".

The terminal device can trigger the fast MCG recovery process only after the configuration displayed on the network side, that is, through the configuration of the timer Guard timer (the network side configures the timer Guard timer through RRC dedicated signaling) to imply that the terminal device can perform the fast MCG recovery process. .

When the fast MCG recovery process is triggered, the terminal device sends MCGFailureInformation, and the terminal device has the following behaviors at this time: 1. Suspend the transmission on the MCG side SRBs, DRBs, except for SRB0; 2. Reset the MCG MAC; 3. Save the data from the MCG and The measurement configuration on the SCG side, if possible, continue to perform measurements according to the measurement configuration on the MCG and SCG sides. If the terminal device receives the response from the network side, the terminal device resumes the transmission on the MCG side.

Referring to Figure 3, Figure 3 provides a schematic diagram of a terminal device triggering a fast MCG recovery process using Split SRB1 on the SCG side. Among them, the path of Split SRB1 in the uplink direction is: terminal equipment → MAC layer on the SCG side → RLC layer on the SCG side → PDCP layer on the MCG side → RRC layer on the MCG side. The path of Split SRB1 in the downstream direction is: RRC layer on the MCG side → PDCP layer on the MCG side → RLC layer on the SCG side → MAC layer on the SCG side → terminal equipment. The terminal device uses Split SRB1 to send an MCG failure information (MCGFailureInformation) message to the network, and uses Split SRB1 to receive a reconfiguration with sync or RRC Release (RRC Release) message in response to the network.

It should be noted that if the PDCP duplication (PDCP duplication) function of split SRB1 is activated, when the terminal device detects that the MCG fails, it is not necessary to switch the primary path (primaryPath). If the PDCP duplication function of split SRB1 is not activated, the primaryPath is implicitly configured as the SCG side. During the MCG recovery process or the RRC connection reestablishment process, the terminal device expects the network side to display the configuration of the primaryPath to the MCG.

Referring to FIG. 4 , FIG. 4 shows a schematic diagram of a terminal device triggering a fast MCG recovery process using SRB3 on the SCG side. The path of the SRB3 in the uplink direction is: terminal device→MAC layer on the SCG side→RLC layer on the SCG side→PDCP layer on the SCG side→RRC layer on the SCG side→MCG. The path of the SRB3 in the downlink direction is: MCG→RRC layer on the SCG side→PDCP layer on the SCG side→RLC layer on the SCG side→MAC layer on the SCG side→terminal device. The terminal device uses SRB3 to send an MCG failure information (MCGFailureInformation) message to the network, as well as a synchronous reconfiguration (reconfiguration with sync) or RRC release (RRC Release) message that enables SRB3 to receive a network response.

As an example, the content of the MCG failure information (MCGFailureInformation) message includes at least one of the following: a measurement result available on the MCG side; a reason for the failure of the MCG link; a measurement result available on the SCG side; Available measurement results.

The foregoing fast MCG recovery process is performed when the SCG is activated by default. However, the SCG can be in the active state or in the deactivated state. If the SCG is in the deactivated state, in the event of a wireless link failure of the MCG, the terminal device cannot quickly recover the MCG through the link on the SCG side. How to perform the MCG Recovery is a problem that needs to be solved. To this end, the following technical solutions of the embodiments of the present application are proposed.

It should be noted that, in the embodiments of the present application, the meanings of "fast MCG recovery" and "MCG fast recovery" are equivalent and can be replaced with each other.

It should be noted that, the description of the "MCG side" in the embodiments of the present application may also be referred to as the "MN side", and the description of the "SCG side" may also be referred to as the "SN side".

The technical solutions of the embodiments of the present application can be applied to the DC architecture, the master node in the DC is the MN, the secondary node in the DC is the SN, the cell group on the MN side is called the MCG, and the cell group on the SN side is called the SCG. This embodiment of the present application does not limit the type of DC, for example, it may be MR-DC, EN-DC, NE-DC, NR-DC, and so on. Of course, the technical solutions of the embodiments of the present application can also be applied to a multi-connection architecture.

FIG. 5 is a schematic flowchart 1 of a method for processing a wireless link failure provided by an embodiment of the present application. As shown in FIG. 5 , the method for processing a wireless link failure includes the following steps:

Step 501: The terminal device determines that an MCG radio link failure occurs when the SCG is in a deactivated state.

Step 502: The terminal device triggers the radio resource control RRC connection reestablishment process of the MCG or the fast recovery process of the MCG.

In this embodiment of the present application, the terminal device is configured with a DC mode, such as an MR-DC mode.

In some optional embodiments, if the SCG is in a deactivated state, the terminal device triggers the RRC connection re-establishment process in the event of a radio link failure in the MCG. Here, the terminal device may be configured to trigger the fast MCG recovery procedure, or may not be configured to trigger the fast MCG recovery procedure. Specifically, the configuration of the terminal device to trigger the fast MCG recovery process is implicitly configured through the timer Guard timer (ie T316). That is to say, if the timer T316 is configured on the network side, it is considered that the terminal device can trigger the fast MCG. Recovery process; if the network device does not configure the timer T316, it is considered that the terminal device cannot trigger the fast MCG recovery process. Regardless of whether the network device is configured with the timer T316, if the SCG is in a deactivated state, the terminal device triggers the RRC connection re-establishment process in the event of a radio link failure in the MCG.

In some optional embodiments, if the SCG is in a deactivated state, in the case of a radio link failure of the MCG, the terminal device triggers the fast recovery process of the MCG, specifically, the terminal device initiates a random access process to the SCG, and The fast recovery of the MCG is performed based on the SCG, thereby ensuring fast recovery of the MCG.

Here, the terminal device initiates a random access procedure to the SCG, and performs fast recovery of the MCG based on the SCG, including: the terminal device sends a first message to the SCG, where the first message carries the MSG3 in the random access procedure in; the terminal equipment receives the RRC reconfiguration message or the RRC release message sent by the SCG, the RRC reconfiguration message carries the synchronous reconfiguration (reconfiguration with sync), and the RRC reconfiguration message or the RRC release message is sent by the MCG to the described SCG.

In some optional implementation manners, the terminal device is configured with a first timer; after the terminal device sends the first message to the SCG, the first timer is started; if the first timer is Before the timeout, if the terminal device receives the RRC reconfiguration message or the RRC release message, the terminal device stops the first timer.

Here, the first timer is configured by the network device. Optionally, the first timer is configured by the network device through RRC signaling. The first timer may also be referred to as a timer Guard timer or a timer T316. Here, for the timer Guard timer or timer T316, reference may be made to the description of the foregoing related solutions.

Here, as an example, the content of the RRC reconfiguration message may be shown in Table 2 below.

Table 2

The following situations describe how the terminal device touches the quick recovery process of the MCG.

Case 1: The first message is an RRC connection re-establishment request message.

The terminal device sends an RRC connection re-establishment request message to the SCG, and the RRC connection re-establishment request message is carried in MSG3 in the random access process; the terminal device receives an RRC reconfiguration message or an RRC release message sent by the SCG, the The RRC reconfiguration message carries a synchronous reconfiguration (reconfiguration with sync), and the RRC reconfiguration message or the RRC release message is sent by the MCG to the SCG.

In some optional embodiments, the RRC connection re-establishment request message carries at least one of the following:

a first C-RNTI, where the first C-RNTI is a C-RNTI allocated by the MCG for the terminal device;

The first PCI, the first PCI is the PCI of the primary cell PCell in the MCG;

The first shortMAC-I, the first shortMAC-I is a shortMAC-I generated based on the secret key and integrity protection algorithm of the MCG.

In some optional embodiments, the RRC connection re-establishment request message carries a re-establishment reason, and the re-establishment reason is used to indicate at least one of the following:

The reason for the re-establishment is the radio link failure of the MCG;

The purpose of reconstruction is to activate the SCG;

The purpose of reconstruction is to perform rapid recovery of MCG based on SCG.

In some optional embodiments, after the terminal device sends an RRC connection reestablishment request message to the SCG, the terminal device receives an SCG activation confirmation message or an RRC connection reestablishment message sent by the SCG; wherein the SCG activation confirmation message Prepared and delivered by the SCG; or, the SCG activation confirmation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.

Here, when the SCG activation confirmation message is prepared by the MCG, after the MCG failure message or the RRC connection reestablishment message is sent by the SCG to the MCG, the SCG activation confirmation message is prepared by the MCG.

Case 2: The first message is an MCG failure information (MCGFailureInformation) message.

The terminal device sends an MCG failure information message to the SCG, and the MCG failure information message is carried in MSG3 in the random access process; the terminal device receives an RRC reconfiguration message or an RRC release message sent by the SCG, and the RRC reconfiguration message is The configuration message carries a synchronous reconfiguration (reconfiguration with sync), and the RRC reconfiguration message or the RRC release message is sent by the MCG to the SCG.

In some optional embodiments, the MCG failure information message carries the first information on the MCG side or the second information on the SCG side.

When the MCG failure information message carries the first information on the MCG side, the first information is forwarded by the SCG to the MCG, and the MCG verifies the identity of the terminal device based on the first information. Alternatively, when the MCG failure information message carries the second information on the SCG side, the SCG verifies the identity of the terminal device based on the second information for the second information.

In some optional embodiments, the first information on the MCG side includes at least one of the following:

The first PCI, the first PCI is the PCI of the PCell in the MCG;

In some optional embodiments, the second information on the SCG side includes at least one of the following:

a second C-RNTI, where the second C-RNTI is the C-RNTI allocated by the SCG for the terminal device;

The second PCI, the second PCI is the PCI of the PSCell in the SCG;

The second shortMAC-I, the second shortMAC-I is a shortMAC-I generated based on the secret key of the SCG and an integrity protection algorithm.

In some optional embodiments, after the terminal device sends the MCG failure information message to the SCG, the terminal device receives the SCG activation message sent by the SCG; wherein the SCG activation message is prepared and delivered by the SCG ; or, the SCG activation message is prepared by the MCG and forwarded to the SCG to be delivered by the SCG.

In some optional embodiments, when the SCG activation message is prepared by the MCG, after the MCG failure information message or the content in the MCG failure information message is sent by the SCG to the MCG, the SCG activation message is sent by the MCG Prepare.

Here, the content of the MCG failure information message includes at least one of the following: a measurement result available on the MCG side; a reason for the failure of the MCG link; a measurement result available on the SCG side; available measurements on a non-serving cell (Non-serving Cell) result.

In some optional embodiments, the SCG activation message carries a reason for activating the SCG, and the reason for activating the SCG is used to indicate at least one of the following:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.

Case 3: The first message is an SCG activation request message.

The terminal device sends an SCG activation request message to the SCG, and the SCG activation request message is carried in MSG3 in the random access process; the terminal device receives an RRC reconfiguration message or an RRC release message sent by the SCG, and the RRC reconfiguration message The configuration message carries a synchronous reconfiguration (reconfiguration with sync), and the RRC reconfiguration message or the RRC release message is sent by the MCG to the SCG.

In some optional embodiments, the SCG activation request message carries the first information on the MCG side or the second information on the SCG side.

When the SCG activation request message carries the first information on the MCG side, the first information is forwarded by the SCG to the MCG, and the MCG verifies the identity of the terminal device based on the first information. Alternatively, when the SCG activation request message carries the second information on the SCG side, the SCG verifies the identity of the terminal device based on the second information for the second information.

The first PCI, the first PCI is the PCI of the PCell in the MCG;

The second PCI, the second PCI is the PCI of the PSCell in the SCG;

In some optional embodiments, the SCG activation request message carries an activation reason, and the activation reason is used to indicate at least one of the following:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.

In some optional embodiments, after the terminal device sends an SCG activation request message to the SCG, the terminal device receives the SCG activation message sent by the SCG; wherein the SCG activation message is prepared and delivered by the SCG ; or, the SCG activation message is prepared by the MCG and forwarded to the SCG to be delivered by the SCG.

In some optional embodiments, when the SCG activation message is prepared by the MCG, after the SCG activation request message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.

Through the above technical solutions of the embodiments of the present application, it is clarified how to implement fast MCG recovery in the case of a wireless link failure of the MCG, thereby ensuring normal communication on the MCG side.

The technical solutions of the embodiments of the present application will be illustrated below with reference to specific application examples.

Application example one

The end device is configured with DC mode, eg MR-DC mode.

1. If the SCG is in a deactivated state, when a radio link failure occurs in the MCG, the terminal device initiates a random access procedure to the SCG.

2. During the random access process, the terminal device sends an RRC connection reestablishment request message to the SCG through message 3 (MSG3).

Here, optionally, the terminal device starts the timer T316 after sending the RRC connection reestablishment request message.

The RRC connection re-establishment request message carries at least one of the following information: C-RNTI, PCI, shortMAC-I. The C-RNTI is the C-RNTI allocated by the MCG to the terminal device, the PCI is the PCI of the PCell on the MCG side, and the shortMAC-I is the shortMAC-I generated by using the KgNB or KeNB, that is, the secret key and the integrity protection algorithm on the MCG side. .

The RRC connection reestablishment request message also carries a reestablishment cause (ReestablishmentCause). Here, the reestablishment cause is "MCGfailure", which is used to indicate at least one of the following: the reason for the reestablishment is that the MCG fails in the radio link; the purpose of the reestablishment is to activate the SCG; The purpose is to perform fast recovery of MCG based on SCG. Table 3 below gives the contents of the rebuild reason.

table 3

3. After the SCG receives the RRC connection reestablishment request message,

Option 1: The SCG sends an SCG activation confirmation message or an RRC connection reestablishment message to the terminal device. or,

Option 2: The SCG sends an MCG failure message or an RRC connection reestablishment request message to the MCG, the MCG prepares an SCG activation confirmation message, and delivers the SCG activation confirmation message to the terminal device through the link on the SCG side.

4. After the MCG receives the MCG failure notification message or the RRC connection re-establishment request message sent by the SCG, it sends the RRC reconfiguration message carrying the synchronous reconfiguration (reconfiguration with sync) to the terminal device through the link on the SCG side or sends the RRC release to the SCG ( RRC Release) message.

Application example two

The end device is configured with DC mode, eg MR-DC mode.

1. If the SCG is in a deactivated state, when a radio link failure occurs in the MCG, the terminal device initiates a random access procedure to the SCG side.

2. During the random access process, the terminal device sends an MCG failure information (MCGFailureInformation) message to the SCG through message 3 (MSG3).

Here, optionally, the terminal device starts the timer T316 after sending the MCGFailureInformation message.

The MCGFailureInformation message carries at least one of the following information on the MCG side or the SCG side: C-RNTI, PCI, and shortMAC-I. in,

If the MCGFailureInformation message carries the information on the MCG side, then the C-RNTI is the C-RNTI allocated by the MCG for the terminal device, the PCI is the PCI of the PCell on the MCG side, and the shortMAC-I is the use of KgNB or KeNB, that is, the MCG side The shortMAC-I generated by the secret key and integrity protection algorithm.

If the MCGFailureInformation message carries the information on the SCG side, then the C-RNTI is the C-RNTI allocated by the SCG to the terminal device, the PCI is the PCI of the PSCell on the SCG side, and the shortMAC-I is the use of S-KgNB or S-KeNB, That is, the secret key on the SCG side and the shortMAC-I generated by the integrity protection algorithm.

3. After the SCG receives the MCGFailureInformation message, if it carries the information on the SCG side, the SCG needs to verify the legitimacy of the identity of the terminal device according to the information. If it carries the information on the MCG side, the SCG forwards the information to the MCG by the The MCG verifies the legitimacy of the terminal device's identity. further,

Option 1: The SCG sends an SCG activation message to the terminal device. or,

Option 2: The SCG sends the MCGFailureInformation message or the content in the MCGFailureInformation message to the MCG, the MCG prepares the SCG activation message, and delivers the SCG activation message to the terminal device through the link on the SCG side.

4. After the MCG receives the MCGFailureInformation message or the MCG failure notification message sent by the SCG, it sends an RRC reconfiguration message carrying reconfiguration with sync to the terminal device through the link on the SCG side or sends an RRC release (RRC Release) to the SCG. information.

Application example three

The end device is configured with DC mode, eg MR-DC mode.

2. During the random access process, the terminal device sends an SCG activation request message to the SCG through message 3 (MSG3).

Here, optionally, the terminal device starts the timer T316 after sending the SCG activation request message.

The SCG activation request message carries at least one of the following information on the MCG side or the SCG side: C-RNTI, PCI, and shortMAC-I. in,

If the SCG activation request message carries the information on the MCG side, then the C-RNTI is the C-RNTI allocated by the MCG for the terminal device, the PCI is the PCI of the PCell on the MCG side, and the shortMAC-I is the use of KgNB or KeNB, that is, MCG side secret key and shortMAC-I generated by the integrity protection algorithm.

If the SCG activation request message carries the information on the SCG side, then the C-RNTI is the C-RNTI allocated by the SCG for the terminal device, the PCI is the PCI of the PSCell on the SCG side, and the shortMAC-I is the use of S-KgNB or S- KeNB, that is, the shortMAC-I generated by the secret key on the SCG side and the integrity protection algorithm.

Further, the SCG activation request message can also carry the reason for requesting the activation of the SCG (referred to as the activation reason), where the activation reason is, for example, "MCG failure", which is used to indicate at least one of the following: the activation reason is that the MCG has a radio link failure. ; The purpose of activation is to activate SCG; the purpose of activation is to quickly recover MCG based on SCG.

3. After the SCG receives the SCG activation request message, if it carries the information on the SCG side, the SCG needs to verify the legitimacy of the identity of the terminal device according to the information. If it carries the information on the MCG side, the SCG forwards the information to the MCG The identity legitimacy of the terminal device is verified by the MCG. further,

Option 1: The SCG sends an SCG activation message to the terminal device, optionally carrying the activation reason, such as "MCG failure". or,

Option 2: The SCG sends an SCG activation request message to the MCG, the MCG prepares the SCG activation message, and delivers the SCG activation message to the terminal device through the link on the SCG side.

4. After receiving the SCG activation request message sent by the SCG, the MCG sends an RRC reconfiguration message carrying reconfiguration with sync to the terminal device through the link on the SCG side or sends an RRC release (RRC Release) message to the SCG.

FIG. 6 is a second schematic flowchart of a method for processing a wireless link failure provided by an embodiment of the present application. As shown in FIG. 6 , the method for processing a wireless link failure includes the following steps:

Step 601: The terminal device determines that an MCG radio link failure has occurred.

Step 602: The terminal device sends a first message to the SCG and starts a first timer, and the first message is used to trigger the fast recovery process of the MCG; if the terminal device expires before the first timer expires, the terminal device After receiving the SCG deactivation command, the terminal device triggers the RRC connection re-establishment process.

In this embodiment of the present application, if the terminal device detects that a radio link failure occurs in the MCG, and the first timer is configured, the terminal device performs fast SCG recovery through the link on the SCG side.

In the embodiment of the present application, in the process of fast SCG recovery by the terminal device through the link on the SCG side, the terminal device sends the first message to the MCG through the link on the SCG side, and starts the first timer after sending the first message . Here, optionally, the first message is an RRC connection re-establishment request message or an MCG failure information message or an SCG activation request message.

Here, the link on the SCG side is, for example, split SRB1 (see FIG. 3 ) or SRB3 (see FIG. 4 ). It should be noted that, when the terminal device sends the first message, the SCG is still in an active state. Therefore, the terminal device can use the split SRB1 or SRB3 on the SCG side to send the first message.

In this embodiment of the present application, if the terminal device receives the SCG deactivation command before the first timer expires (or during the running of the first timer), the terminal device triggers the RRC connection re-establishment process . Here, the time point when the terminal device triggers the RRC connection reestablishment process may have the following two options:

Option 1: After receiving the SCG deactivation command, the terminal device stops the first timer and triggers the RRC connection reestablishment process; or,

Option 2: After receiving the SCG deactivation command, the terminal device maintains the running of the first timer and triggers an RRC connection re-establishment process after the first timer expires.

In the above solution, while the first timer is running, the SCG is maintained in an activated state; after the first timer stops or times out, the SCG enters a deactivated state.

For example: during the running of timer T316, if the terminal device receives the SCG deactivation command, then: the terminal device stops the timer T316 and triggers the RRC connection re-establishment process; After the timer T316 times out, the RRC connection re-establishment process is triggered. Here, during the running of the timer T316, the SCG is in an active state, and the terminal device saves the PDCCH monitoring on the SCG side. After the timer T316 stops or times out, the SCG is in a deactivated state, and the terminal device does not transmit and/or receive on the SCG side.

FIG. 7 is a schematic structural diagram 1 of an apparatus for processing a wireless link failure provided by an embodiment of the present application. As shown in FIG. 7 , the apparatus for processing a wireless link failure includes:

A determining unit 701, configured to determine that an MCG radio link failure occurs when the SCG is in a deactivated state;

The communication unit 702 is configured to trigger the RRC connection reestablishment process of the MCG or the fast recovery process of the MCG.

In some optional embodiments, the communication unit 702 is configured to initiate a random access procedure to the SCG, and perform fast recovery of the MCG based on the SCG.

In some optional embodiments, the communication unit 702 is configured to send a first message to the SCG, where the first message is carried in MSG3 in the random access process; receive an RRC reconfiguration message or RRC release sent by the SCG message, the RRC reconfiguration message carries the synchronization reconfiguration, and the RRC reconfiguration message or the RRC release message is sent by the MCG to the SCG.

In some optional implementation manners, the terminal device is configured with a first timer; the apparatus further includes:

A control unit, configured to start the first timer after sending the first message to the SCG; stop if the RRC reconfiguration message or the RRC release message is received before the first timer expires the first timer.

In some optional embodiments, the first message is an RRC connection re-establishment request message.

The first PCI, the first PCI is the PCI of the PCell in the MCG;

The reason for the re-establishment is the radio link failure of the MCG;

The purpose of reconstruction is to activate the SCG;

The purpose of reconstruction is to perform rapid recovery of MCG based on SCG.

In some optional embodiments, the communication unit 702 is further configured to, after sending the first message to the SCG, receive an SCG activation confirmation message or an RRC connection reestablishment message sent by the SCG;

The SCG activation confirmation message is prepared and delivered by the SCG; or the SCG activation confirmation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.

In some optional embodiments, when the SCG activation confirmation message is prepared by the MCG,

After the MCG failure message or the RRC connection reestablishment message is sent by the SCG to the MCG, the SCG activation confirmation message is prepared by the MCG.

In some optional embodiments, the first message is an MCG failure information message or an SCG activation request message.

In some optional embodiments, the MCG failure information message or the SCG activation request message carries the first information on the MCG side or the second information on the SCG side.

The first PCI, the first PCI is the PCI of the PCell in the MCG;

The second PCI, the second PCI is the PCI of the PSCell in the SCG;

In some optional implementation manners, in the case that the MCG failure information message or the SCG activation request message carries the first information on the MCG side, the first information is forwarded by the SCG to the MCG and sent by the MCG based on the The first information verifies the identity of the terminal device.

In some optional embodiments, when the MCG failure information message or the SCG activation request message carries the second information on the SCG side, the second information is verified by the SCG based on the second information on the terminal device identity of.

In some optional embodiments, when the first message is an SCG activation request message, the SCG activation request message carries an activation reason, and the activation reason is used to indicate at least one of the following:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.

In some optional implementation manners, the communication unit 702 is further configured to, after sending the first message to the SCG, receive an SCG activation message sent by the SCG;

The SCG activation message is prepared and delivered by the SCG; or, the SCG activation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.

In some optional implementation manners, when the first message is an SCG activation request message,

After the SCG activation request message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.

In some optional implementation manners, when the first message is an MCG failure information message,

After the MCG failure information message or the content in the MCG failure information message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.

It should be understood by those skilled in the art that the relevant description of the apparatus for processing a wireless link failure in the embodiment of the present application can be understood with reference to the relevant description of the method for processing a wireless link failure in the embodiment of the present application.

FIG. 8 is a schematic diagram 2 of the structure and composition of an apparatus for processing a wireless link failure provided by an embodiment of the present application. As shown in FIG. 8 , the apparatus for processing a wireless link failure includes:

A determining unit 801, configured to determine that an MCG wireless link failure occurs;

A communication unit 802, configured to send a first message to the SCG, where the first message is used to trigger a fast recovery process of the MCG;

a control unit 803, configured to start a first timer after the communication unit sends the first message to the SCG;

The communication unit 802 is further configured to trigger an RRC connection re-establishment process if the SCG deactivation command is received before the first timer expires.

In some optional implementation manners, the control unit 803 is configured to stop the first timer after the communication unit 802 receives the SCG deactivation command; or, after the communication unit 802 receives the SCG deactivation command After the activation command, maintain the running of the first timer until the timeout;

The communication unit 802 is configured to trigger an RRC connection re-establishment process after the first timer stops or times out.

In some optional embodiments, the SCG is maintained in an active state during the running of the first timer;

After the first timer stops or times out, the SCG enters a deactivated state.

In some optional embodiments, the first message is an RRC connection re-establishment request message or an MCG failure information message or an SCG activation request message.

FIG. 9 is a schematic structural diagram of a communication device 900 provided by an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 900 shown in FIG. 9 includes a processor 910, and the processor 910 can call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in FIG. 9 , the communication device 900 may further include a memory 920 . The processor 910 may call and run a computer program from the memory 920 to implement the methods in the embodiments of the present application.

The memory 920 may be a separate device independent of the processor 910 , or may be integrated in the processor 910 .

Optionally, as shown in FIG. 9 , the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by a device.

Among them, the transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 900 may specifically be a network device in this embodiment of the present application, and the communication device 900 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For brevity, details are not repeated here. .

Optionally, the communication device 900 may specifically be the mobile terminal/terminal device in the embodiments of the present application, and the communication device 900 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiments of the present application. , and will not be repeated here.

FIG. 10 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1000 shown in FIG. 10 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 10 , the chip 1000 may further include a memory 1020 . The processor 1010 may call and run a computer program from the memory 1020 to implement the methods in the embodiments of the present application.

The memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.

Optionally, the chip 1000 may further include an input interface 1030 . The processor 1010 can control the input interface 1030 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1000 may further include an output interface 1040 . The processor 1010 can control the output interface 1040 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. For brevity, here No longer.

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

FIG. 11 is a schematic block diagram of a communication system 1100 provided by an embodiment of the present application. As shown in FIG. 11 , the communication system 1100 includes a terminal device 1110 and a network device 1120 .

The terminal device 1110 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1120 can be used to implement the corresponding functions implemented by the network device in the above method. For brevity, details are not repeated here. .

It should be understood that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above memory is an example but not a limitative description, for example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.

Embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.

The embodiments of the present application also provide a computer program.

Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application. The corresponding process, for the sake of brevity, will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method of handling radio link failure, the method comprising:

The terminal device determines that a radio link failure of the primary cell group MCG occurs when the secondary cell group SCG is in a deactivated state;

The terminal device triggers the radio resource control RRC connection reestablishment process of the MCG or the fast recovery process of the MCG.
The method according to claim 1, wherein the terminal device triggers a quick recovery process of the MCG, comprising:

The terminal device initiates a random access procedure to the SCG, and performs fast recovery of the MCG based on the SCG.
The method according to claim 2, wherein the terminal device initiates a random access procedure to the SCG, and performs fast recovery of the MCG based on the SCG, comprising:

sending, by the terminal device, a first message to the SCG, where the first message is carried in MSG3 in the random access process;

The terminal device receives an RRC reconfiguration message or an RRC release message sent by the SCG, where the RRC reconfiguration message carries the synchronization reconfiguration, and the RRC reconfiguration message or the RRC release message is sent by the MCG to the SCG.
The method of claim 3, wherein the terminal device is configured with a first timer; the method further comprises:

After the terminal device sends the first message to the SCG, start the first timer;

If the terminal device receives the RRC reconfiguration message or the RRC release message before the first timer expires, the terminal device stops the first timer.
The method according to claim 3 or 4, wherein the first message is an RRC connection re-establishment request message.
The method according to claim 5, wherein the RRC connection re-establishment request message carries at least one of the following:

The wireless network of the first cell temporarily identifies the C-RNTI, where the first C-RNTI is the C-RNTI allocated by the MCG for the terminal device;

a first physical cell identifier PCI, where the first PCI is the PCI of the primary cell PCell in the MCG;

The first short complete message authentication code shortMAC-I, the first shortMAC-I is the shortMAC-I generated based on the secret key of the MCG and the integrity protection algorithm.
The method according to claim 5 or 6, wherein the RRC connection re-establishment request message carries a re-establishment reason, and the re-establishment reason is used to indicate at least one of the following:

The reason for the re-establishment is the radio link failure of the MCG;

The purpose of reconstruction is to activate the SCG;

The purpose of reconstruction is to perform rapid recovery of MCG based on SCG.
The method according to any one of claims 5 to 7, wherein after the terminal device sends the first message to the SCG, the method further comprises:

receiving, by the terminal device, an SCG activation confirmation message or an RRC connection reestablishment message sent by the SCG;

The SCG activation confirmation message is prepared and delivered by the SCG; or the SCG activation confirmation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.
The method according to claim 8, wherein, when the SCG activation confirmation message is prepared by the MCG,

After the MCG failure message or the RRC connection reestablishment message is sent by the SCG to the MCG, the SCG activation confirmation message is prepared by the MCG.
The method according to claim 3 or 4, wherein the first message is an MCG failure information message or an SCG activation request message.
The method according to claim 10, wherein the MCG failure information message or the SCG activation request message carries the first information on the MCG side or the second information on the SCG side.
The method according to claim 11, wherein the first information on the MCG side includes at least one of the following:

a first C-RNTI, where the first C-RNTI is a C-RNTI allocated by the MCG for the terminal device;

The first PCI, the first PCI is the PCI of the PCell in the MCG;

The first shortMAC-I, the first shortMAC-I is a shortMAC-I generated based on the secret key and integrity protection algorithm of the MCG.
The method according to claim 11, wherein the second information on the SCG side includes at least one of the following:

a second C-RNTI, where the second C-RNTI is the C-RNTI allocated by the SCG for the terminal device;

The second PCI, the second PCI is the PCI of the PSCell in the SCG;

The second shortMAC-I, the second shortMAC-I is a shortMAC-I generated based on the secret key of the SCG and an integrity protection algorithm.
The method according to claim 11 or 12, wherein, when the MCG failure information message or the SCG activation request message carries the first information on the MCG side, the first information is forwarded by the SCG to the MCG and sent by the The MCG verifies the identity of the terminal device based on the first information.
The method according to claim 11 or 13, wherein when the MCG failure information message or the SCG activation request message carries the second information on the SCG side, the second information is used by the SCG based on the second information Verify the identity of the terminal device.
The method according to any one of claims 10 to 15, wherein, when the first message is an SCG activation request message, the SCG activation request message carries an activation reason, and the activation reason is used to indicate at least the following one:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.
The method according to any one of claims 10 to 16, wherein after the terminal device sends the first message to the SCG, the method further comprises:

receiving, by the terminal device, an SCG activation message sent by the SCG;

The SCG activation message is prepared and delivered by the SCG; or, the SCG activation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.
The method according to claim 17, wherein, when the first message is an SCG activation request message,

After the SCG activation request message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.
The method according to claim 17, wherein, when the first message is an MCG failure information message,

After the MCG failure information message or the content in the MCG failure information message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.
The method according to any one of claims 17 to 19, wherein the SCG activation message carries a reason for activating the SCG, and the reason for activating the SCG is used to indicate at least one of the following:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.
A method of handling radio link failure, the method comprising:

The terminal device determines that an MCG wireless link failure has occurred;

The terminal device sends a first message to the SCG and starts a first timer, where the first message is used to trigger a fast recovery process of the MCG;

If the terminal device receives an SCG deactivation command before the first timer expires, the terminal device triggers an RRC connection re-establishment process.
The method according to claim 21, wherein the terminal device triggers an RRC connection re-establishment process, comprising:

After receiving the SCG deactivation command, the terminal device stops the first timer and triggers the RRC connection reestablishment process; or,

After receiving the SCG deactivation command, the terminal device maintains the running of the first timer and triggers an RRC connection re-establishment process after the first timer expires.
The method of claim 22, wherein,

During the running of the first timer, the SCG is maintained in an active state;

After the first timer stops or times out, the SCG enters a deactivated state.
The method according to any one of claims 21 to 23, wherein the first message is an RRC connection re-establishment request message or an MCG failure information message or an SCG activation request message.
An apparatus for handling wireless link failure, applied to terminal equipment, the apparatus comprising:

a determining unit, configured to determine that an MCG radio link failure occurs when the SCG is in a deactivated state;

The communication unit is used to trigger the RRC connection reestablishment process of the MCG or the fast recovery process of the MCG.
The apparatus according to claim 25, wherein the communication unit is configured to initiate a random access procedure to the SCG, and perform fast recovery of the MCG based on the SCG.
The apparatus according to claim 26, wherein the communication unit is configured to send a first message to the SCG, where the first message is carried in MSG3 in a random access process; receive an RRC reconfiguration message sent by the SCG, or RRC release message, the RRC reconfiguration message carries the synchronous reconfiguration, and the RRC reconfiguration message or the RRC release message is sent by the MCG to the SCG.
The apparatus of claim 27, wherein the terminal device is configured with a first timer; the apparatus further comprises:

A control unit, configured to start the first timer after sending the first message to the SCG; stop if the RRC reconfiguration message or the RRC release message is received before the first timer expires the first timer.
The apparatus according to claim 27 or 28, wherein the first message is an RRC connection re-establishment request message.
The apparatus according to claim 29, wherein the RRC connection re-establishment request message carries at least one of the following:

a first C-RNTI, where the first C-RNTI is a C-RNTI allocated by the MCG for the terminal device;

The first PCI, the first PCI is the PCI of the PCell in the MCG;

The first shortMAC-I, the first shortMAC-I is a shortMAC-I generated based on the secret key and integrity protection algorithm of the MCG.
The apparatus according to claim 29 or 30, wherein the RRC connection re-establishment request message carries a re-establishment reason, and the re-establishment reason is used to indicate at least one of the following:

The reason for the re-establishment is the radio link failure of the MCG;

The purpose of reconstruction is to activate the SCG;

The purpose of reconstruction is to perform rapid recovery of MCG based on SCG.
The apparatus according to any one of claims 29 to 31, wherein the communication unit is further configured to, after sending the first message to the SCG, receive an SCG activation confirmation message or an RRC connection reestablishment message sent by the SCG;

The SCG activation confirmation message is prepared and delivered by the SCG; or the SCG activation confirmation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.
The apparatus of claim 32, wherein, when the SCG activation confirmation message is prepared by the MCG,

After the MCG failure message or the RRC connection reestablishment message is sent by the SCG to the MCG, the SCG activation confirmation message is prepared by the MCG.
The apparatus according to claim 27 or 28, wherein the first message is an MCG failure information message or an SCG activation request message.
The apparatus according to claim 34, wherein the MCG failure information message or the SCG activation request message carries the first information on the MCG side or the second information on the SCG side.
The apparatus according to claim 35, wherein the first information on the MCG side includes at least one of the following:

a first C-RNTI, where the first C-RNTI is a C-RNTI allocated by the MCG for the terminal device;

The first PCI, the first PCI is the PCI of the PCell in the MCG;

The first shortMAC-I, the first shortMAC-I is a shortMAC-I generated based on the secret key and integrity protection algorithm of the MCG.
The apparatus according to claim 35, wherein the second information on the SCG side includes at least one of the following:

a second C-RNTI, where the second C-RNTI is the C-RNTI allocated by the SCG for the terminal device;

The second PCI, the second PCI is the PCI of the PSCell in the SCG;

The second shortMAC-I, the second shortMAC-I is a shortMAC-I generated based on the secret key of the SCG and an integrity protection algorithm.
The apparatus according to claim 35 or 36, wherein, when the MCG failure information message or the SCG activation request message carries the first information on the MCG side, the first information is forwarded by the SCG to the MCG and sent by the The MCG verifies the identity of the terminal device based on the first information.
The apparatus according to claim 35 or 37, wherein when the MCG failure information message or the SCG activation request message carries the second information on the SCG side, the second information is used by the SCG based on the second information Verify the identity of the terminal device.
The apparatus according to any one of claims 34 to 39, wherein, when the first message is an SCG activation request message, the SCG activation request message carries an activation reason, and the activation reason is used to indicate at least the following one:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.
The apparatus according to any one of claims 34 to 40, wherein the communication unit is further configured to receive an SCG activation message sent by the SCG after sending the first message to the SCG;

The SCG activation message is prepared and delivered by the SCG; or, the SCG activation message is prepared by the MCG and forwarded to the SCG for delivery by the SCG.
The apparatus according to claim 41, wherein, when the first message is an SCG activation request message,

After the SCG activation request message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.
The apparatus according to claim 41, wherein, when the first message is an MCG failure information message,

After the MCG failure information message or the content in the MCG failure information message is sent by the SCG to the MCG, the SCG activation message is prepared by the MCG.
The apparatus according to any one of claims 41 to 43, wherein the SCG activation message carries a reason for activating the SCG, and the reason for activating the SCG is used to indicate at least one of the following:

The reason for activation is that the MCG has a radio link failure;

The purpose of activation is to activate the SCG;

The purpose of activation is rapid recovery of MCG based on SCG.
An apparatus for handling wireless link failure, applied to terminal equipment, the apparatus comprising:

a determining unit, used for determining that the MCG wireless link failure has occurred;

a communication unit, configured to send a first message to the SCG, where the first message is used to trigger a fast recovery process of the MCG;

a control unit, configured to start a first timer after the communication unit sends the first message to the SCG;

The communication unit is further configured to trigger an RRC connection re-establishment process if the SCG deactivation command is received before the first timer expires.
The apparatus of claim 45, wherein,

The control unit is configured to stop the first timer after the communication unit receives the SCG deactivation command; or, after the communication unit receives the SCG deactivation command, maintain the first timer runs until timeout;

The communication unit is configured to trigger an RRC connection re-establishment process after the first timer stops or times out.
The apparatus of claim 46, wherein,

During the running of the first timer, the SCG is maintained in an active state;

After the first timer stops or times out, the SCG enters a deactivated state.
The apparatus according to any one of claims 45 to 47, wherein the first message is an RRC connection re-establishment request message or an MCG failure information message or an SCG activation request message.
A communication device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute the computer program according to any one of claims 1 to 20. , or the method of any one of claims 21 to 24.
A chip, comprising: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 20, or claims 21 to 24 The method of any of the above.
A computer-readable storage medium for storing a computer program that causes a computer to perform the method of any one of claims 1 to 20, or the method of any one of claims 21 to 24 .
A computer program product comprising computer program instructions that cause a computer to perform the method of any one of claims 1 to 20, or the method of any one of claims 21 to 24.
A computer program that causes a computer to perform the method of any one of claims 1 to 20, or the method of any one of claims 21 to 24.