CN111565424B - Method, device and storage medium for processing connection failure in dual-connection system - Google Patents

Method, device and storage medium for processing connection failure in dual-connection system Download PDF

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Publication number
CN111565424B
CN111565424B CN201910113933.4A CN201910113933A CN111565424B CN 111565424 B CN111565424 B CN 111565424B CN 201910113933 A CN201910113933 A CN 201910113933A CN 111565424 B CN111565424 B CN 111565424B
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base station
source
user terminal
target
main base
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CN111565424A (en
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刘爱娟
梁靖
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Datang Mobile Communications Equipment Co Ltd
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Telecommunications Science and Technology Research Institute Co Ltd
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Priority to PCT/CN2020/075143 priority patent/WO2020164555A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H04W36/28—Reselection being triggered by specific parameters by agreed or negotiated communication parameters involving a plurality of connections, e.g. multi-call or multi-bearer connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Abstract

The invention discloses a method, a device and a storage medium for processing connection failure in a dual-connection system, which are used for solving the technical problem that the connection between a user terminal and a network side cannot be maintained when the MCG failure occurs in a main base station in the dual-connection system in the prior art. The method comprises the following steps: receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal; determining whether to perform main base station switching on the user terminal based on the channel measurement report; if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station.

Description

Method, device and storage medium for processing connection failure in dual-connection system
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a storage medium for processing connection failure in a dual connectivity system.
Background
In a Long Term Evolution (LTE) system, an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is composed of a plurality of base stations (enodebs), the enodebs are connected to an Evolved Packet Core (EPC) through an S1 interface, and the enodebs are connected to each other through an X2 interface. To support higher data throughput, a User terminal (UE) may implement dual connectivity through two enodebs. One of the enodebs serves as a Master Node (MN) and is connected with a core network through a control plane; another eNB is a Secondary Node (SN) and is not connected to the core network via a control plane.
In the fifth Generation mobile communication (5G) system, similar to dual connection of the LTE system, tight interworking (light interworking) of eNodeB and gNB and dual connection of 5G base station (gNB) and gNB are also supported. In Rel-15 and previous releases, if the UE fails to connect at the primary base station, data transfer between the network side (including the primary and secondary base stations) and the UE is stopped. In order to further improve the system performance, Rel-16, when the connection failure occurs in the main base station, the UE may transmit the connection information to the main base station through the auxiliary base station, and the main base station may keep the current state (that is, MN fails but SN is always transmitting data) or determine the target base station, and initiate a subsequent and handover process to the target base station; at the same time, data transfer between the SN node and the UE continues.
Please refer to fig. 1 and fig. 2, wherein fig. 1 is a schematic diagram of a dual connectivity system in which a 5G base station is connected to a core network through an LTE base station, and fig. 2 is a schematic diagram of a dual connectivity system in which both the 5G base station and the LTE base station are connected to the 5G core network.
In fig. 1, an LTE base station is connected to a core network as a primary base station through an S1 interface, and a 5G base station is connected to the primary base station as a secondary base station through an X2 interface; in fig. 2, the 5G base station/LTE base station may be connected to the 5G core network as a main base station through an NG interface, and the 5G base station is connected to the main base station through an Xn interface.
In the prior art, if a Master Cell Group failure (MCG failure) occurs in a UE, after the Master base station receives MCG failure information transmitted by the UE through a secondary base station, if the Master base station determines to initiate a handover process to a suitable target base station, for the target base station, reasonable admission control and selection of the target secondary base station cannot be performed because the state of the UE at the source side is unknown. In addition, if the primary base station decides not to initiate handover, since the currently serving secondary base station does not know the connection state of the primary base station and the core network, it may request a leases SN, thereby causing interruption of data transmission between the UE and the network side.
In view of this, in the dual-connectivity system, when the MCG failure occurs in the main base station, how to handle the connection failure to maintain the connection between the ue and the network side becomes an urgent technical problem to be solved.
Disclosure of Invention
The invention provides a method, a device and a storage medium for processing connection failure in a dual-connection system, which are used for solving the technical problem that the connection between a user terminal and a network side cannot be maintained when the MCG failure occurs in a main base station in the dual-connection system in the prior art.
In a first aspect, to solve the above technical problem, an embodiment of the present invention provides a method for processing connection failure in a dual connectivity system, where the method is applied to a source master base station, and the source master base station and a source secondary base station are connected to form the dual connectivity system, and a technical solution of the method is as follows:
receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal;
determining whether to perform a master base station handover for the user terminal based on the channel measurement report;
if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
After receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal; the method comprises the steps that a source main base station in the dual-connection system determines whether to perform main base station switching on a user terminal or not based on a channel measurement report; if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
Optionally, after determining whether to perform a main base station handover on the user terminal, the method further includes:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
In a second aspect, an embodiment of the present invention provides a method for processing connection failure in a dual connectivity system, where the method is applied to a target primary base station, and the target primary base station and a target secondary base station are connected to form the dual connectivity system, and a technical solution of the method is as follows:
receiving a switching request message sent by a source main base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
and switching the main base station of the user terminal from the source main base station to the target main base station based on the switching request message.
The target main base station receives the switching request message sent by the source main base station, and the target main base station can know that the switching is caused by MCG failure and belongs to emergency according to the indication information of MCG failure of the user terminal in the source main base station carried in the switching request message, and the main base station switching needs to be immediately carried out on the user terminal, so that the admission control of the user terminal is completed. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
Optionally, after receiving the handover request message sent by the source primary base station, the method further includes:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
In a third aspect, an embodiment of the present invention provides an apparatus for processing connection failure in a dual connectivity system, where the apparatus is applied to a source master base station, and the apparatus includes:
a receiving unit, configured to receive MCG failure information of a main serving cell set sent by a user equipment, and a channel measurement report of the user equipment;
a determining unit, configured to determine whether to perform a primary base station handover for the user terminal based on the channel measurement report;
the processing unit is used for sending a switching request message to a target main base station if the user terminal is determined to be switched to the main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
Optionally, after determining whether to perform a main base station handover on the user terminal, the processing unit is further configured to:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
In a fourth aspect, an embodiment of the present invention provides an apparatus for processing connection failure in a dual connectivity system, where the apparatus is applied to a target primary base station, and the target primary base station and a target secondary base station are connected to form a dual connectivity system, and the apparatus includes:
a receiving unit, configured to receive a handover request message sent by a source master base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
a switching unit, configured to switch the master base station of the user terminal from the source master base station to the target master base station based on the switching request message.
Optionally, after receiving the handover request message sent by the source primary base station, the handover unit is further configured to:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
In a fifth aspect, an embodiment of the present invention further provides an apparatus for processing connection failure in a dual connectivity system, where the apparatus is applied to a source master base station, and the source master base station and a source secondary base station are connected to form the dual connectivity system, and the apparatus includes: a processor, a memory, and a transceiver;
the processor is used for reading the program in the memory and executing the following processes:
receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal;
determining whether to perform a master base station handover for the user terminal based on the channel measurement report;
if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
Optionally, after determining whether to perform a main base station handover on the user terminal, the processor is further configured to:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
In a sixth aspect, an embodiment of the present invention further provides an apparatus for processing connection failure in a dual connectivity system, where the apparatus is applied to a target primary base station, and the target primary base station and a target secondary base station are connected to form the dual connectivity system, and the apparatus includes: a processor, a memory, and a transceiver;
the processor is used for reading the program in the memory and executing the following processes:
receiving a switching request message sent by a source main base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
and switching the main base station of the user terminal from the source main base station to the target main base station based on the switching request message.
Optionally, after receiving the handover request message sent by the source primary base station, the processor is further configured to:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium, including:
the computer readable storage medium stores computer instructions which, when executed on a computer, cause the computer to perform the method of the first or second aspect.
Through the technical solutions in one or more of the above embodiments of the present invention, the embodiments of the present invention have at least the following technical effects:
in the embodiment provided by the invention, after receiving the MCG failure information of the main service cell set sent by the user terminal and the channel measurement report of the user terminal; the method comprises the steps that a source main base station in the dual-connection system determines whether to perform main base station switching on a user terminal or not based on a channel measurement report; if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
Drawings
Fig. 1 is a schematic diagram of a dual connectivity system architecture in which a 5G base station is connected to a core network through an LTE base station;
fig. 2 is a schematic diagram of a dual connectivity system architecture in which a 5G base station and an LTE base station are both connected to a 5G core network;
fig. 3 is a flow chart of a base station handover when MCG failure occurs in the prior art;
fig. 4 is a flowchart of a method for processing connection failure in a dual-connection system on a source master base station side according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for processing connection failure in a target primary base station side dual-connection system according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a handover between a source main base station and a target main base station when MCG transmission fails according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating that the source master base station maintains the current state when MCG transmission fails according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a connection failure processing apparatus in a dual connectivity system on a source primary base station side according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a device for processing connection failure in a dual connectivity system at a target primary base station side according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a connection failure processing apparatus in another dual connectivity system on the source primary base station side according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a device for processing connection failure in another dual connectivity system on the target primary base station side according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method, a device and a storage medium for processing connection failure in a dual-connection system, which aim to solve the technical problem that the connection between a user terminal and a network side cannot be maintained when the user terminal generates MCG failure on a main base station in the dual-connection system in the prior art.
In order to solve the technical problems, the general idea of the embodiment of the present application is as follows:
a method for processing connection failure in a dual-connection system is provided, which is applied to a source main base station, wherein the source main base station and a source auxiliary base station are connected to form the dual-connection system, and the method comprises the following steps: receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal; determining whether to perform main base station switching on the user terminal based on the channel measurement report; if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station.
In the scheme, the MCG failure information sent by the user terminal and the channel measurement report of the user terminal are received; the method comprises the steps that a source main base station in the dual-connection system determines whether to perform main base station switching on a user terminal or not based on a channel measurement report; if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
In order to make it more clear for those skilled in the art to understand the technical solution provided in the embodiment of the present invention, before describing the technical solution provided in the embodiment of the present invention in detail, a handover flowchart of a base station when an MCG failure occurs in the prior art is shown in fig. 3.
Step 301: the user terminal sends an MCG failure report (MCG failure) to the source secondary base station.
Specifically, the MCG failure occurs in the user terminal is reported to the network side through a SPLIT Signal Radio Bearer (SPLIT SRB).
Step 302: the source secondary base station sends an RRC message to the source primary base station.
After receiving the MCG failure report sent by the user terminal, the source secondary base station does not analyze the MCG failure report, but transmits the MCG failure report to the source main base station through an RRC message.
Step 303: the source-master base station transmits a handover request to the target-master base station.
And the source main base station determines a target base station for switching the user terminal according to the measurement information reported by the user terminal at regular time and the MCG failure report, and initiates a switching process to the target main base station.
Step 304: the target master base station sends a request for adding the target secondary base station to the target secondary base station.
After the target main base station receives the switching request, the target main base station finds that the task of the target main base station is too heavy, and a base station capable of bearing the task of the source main base station exists in surrounding base stations, so that the target main base station determines and establishes double connection to bear the task of the source main base station, and then the target main base station takes the base station capable of bearing the task of the source main base station as a target auxiliary base station and sends a request for increasing the target auxiliary base station in parallel.
Step 305: and the target auxiliary base station returns a response message for increasing the target auxiliary base station to the target main base station.
The target primary base station determines to add the target secondary base station according to the existing information through the step 304 and the step 305, and the establishment of the dual connectivity is completed.
Step 306: and the target main base station feeds back switching completion information to the source main base station.
After the target master base station completes the establishment of the dual connectivity, it needs to feed back the handover completion information to the source master base station.
Step 307 a: the source master base station transmits a request for releasing the source secondary base station to the source secondary base station.
Step 307 b: and the source auxiliary base station returns a response message for releasing the source auxiliary base station to the source main base station.
After the target master base station completes the handover, the source master base station is caused to initiate a release procedure of the origin secondary base station to the origin secondary base station through step 307a and step 307 b.
Step 308 a: the source primary base station transmits an RRC reconfiguration message to the source secondary base station.
Step 308 b: and the source auxiliary base station forwards the RRC reconfiguration message to the user terminal.
And step 308a and step 308b, the source primary base station sends an RRC reconfiguration message to the user terminal through the source secondary base station, where the RRC reconfiguration message carries a handover command (handover command) for the user terminal to switch from the source primary base station to the target primary base station, and the handover command carries information about dual connectivity used by the target primary base station and about a target secondary base station establishing dual connectivity with the target primary base station.
Step 309: and the user terminal and the target main base station finish random access.
And the user terminal is switched from the source main base station to the target main base station according to the switching command carried in the received RRC reconfiguration message so as to complete the random access with the target main base station.
Step 310: and the user terminal sends the RRC reconnection completing information to the target main base station.
After the user terminal completes the random access with the target main base station, it also needs to send a message of completing the RRC reconnection to the target main base station, so that the target main base station knows that the user terminal has completed establishing the connection with the target main base station.
Step 311: and the user terminal and the target secondary base station finish random access.
The user terminal completes random access with the target secondary base station according to the related information of the target secondary base station in the handover command, until the target primary base station adopts dual-connection according to the handover command carried in the RRC reconfiguration message.
Step 312: and the target main base station sends the target secondary base station to complete the reconfiguration of the target secondary base station.
The user terminal initiates random access through steps 309 to 312, and sends a reconfiguration complete message to the target main base station after success.
Step 313 a: and the source auxiliary base station sends the data volume report of the auxiliary base station to the source main base station.
Step 313 b: and the source main base station forwards the data volume report of the auxiliary base station to the core network.
If necessary, the network side can initiate the report of the data volume report of the secondary base station through the step 313a and the step 313b, so that the core network knows the data volume condition of the user terminal borne by the primary base station and the secondary base station corresponding to the user terminal.
Step 314: and the source main base station sends the auxiliary base station state forward to the target main base station.
Step 315: and the service gateway completes data forwarding with the target main base station through the source main base station.
And initiating a data forwarding process by the source main base station side through the step 314 and the step 315, and transferring the relevant data of the user terminal to the target main base station.
Step 316: the target main base station generates a path switching request to the core network.
Step 317: the core network carries out bearing modification on the service gateway.
Step 318 a: the serving gateway establishes a new path with the target primary base station.
Step 318 b: and the service gateway and the target secondary base station establish a new path.
Step 319: the core network sends a path switching request confirmation to the target main base station.
Through steps 316 to 319, the update of the user plane data channel is completed.
Step 320: and the target main base station sends the context release of the user terminal to the source auxiliary base station.
Step 321: the source primary base station sends the user terminal context release to the source secondary base station.
The source side (source primary base station, source secondary base station) deletes the user terminal context through step 320 and step 321.
In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and the examples of the present invention may be combined with each other without conflict.
Referring to fig. 4, an embodiment of the present invention provides a method for processing connection failure in a dual connectivity system, which is applied to a source-master base station, where the source-master base station and a source-slave base station are connected to form the dual connectivity system.
Step 401: receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal.
Step 402: and determining whether to perform main base station switching on the user terminal based on the channel measurement report.
Step 403: if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station.
When MCG failure occurs between the user terminal and the source main base station, the user terminal sends MCG failure information to the source auxiliary base station, and the source auxiliary base station forwards the MCG failure information to the source main base station.
And after the source main base station receives MCG failure information transmitted by the user terminal and forwarded by the source auxiliary base station, determining whether to perform main base station switching on the user terminal according to the received latest channel measurement report of the user terminal.
For example, the source main base station determines that the channel quality between the user terminal and the a base station is good according to the measurement report of the user terminal, and then determines to allow the user terminal to perform main base station switching, and takes the a base station as a target main base station. And if the source main base station determines that the channel quality between the base station and the user terminal does not reach the specified threshold value according to the measurement report of the user terminal, determining that the user terminal is not allowed to switch the main base station temporarily.
And if the source main base station determines to perform main base station switching on the user terminal, sending a switching request message to the target main base station, wherein the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station. Thus, the target main base station can carry out the admission control of the user terminal according to the indication information of MCG failure. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
Further, the handover request information also carries information of the source secondary base station. Therefore, the target main base station can guide the source auxiliary base station to continue providing service for the user terminal, so that the source auxiliary base station is selected as the corresponding target auxiliary base station when the target auxiliary base station is selected, and further, the data transmission between the user terminal and the network side is not interrupted in the process of switching the main base station.
In the embodiment provided by the invention, after the source main base station determines whether to perform main base station switching on the user terminal, if the source main base station determines not to perform main base station switching on the user terminal, the source main base station sends the indication information of MCG failure to the source auxiliary base station.
When receiving the MCG failure information sent by the user terminal, the source and secondary base stations do not analyze the MCG failure information, so the source and secondary base stations do not know that the user terminal has MCG failure at the source main base station. The source-secondary base station can determine a Radio Resource Management (RRM) decision according to the MCG failure indication information by transmitting the MCG failure indication information to the source-secondary base station through the source-primary base station.
In the embodiment provided by the present invention, when the source main base station communicates with the target main base station via the X2 or Xn interface, the indication information of the MCG failure is a cause information element in the handover request information.
See table 1 for the manner of defining the cause information element in the HANDOVER REQUEST message (HANDOVER REQUEST).
TABLE 1
Figure BDA0001969397690000131
Wherein M represents maintenance.
For example, when the user terminal has MCG failure at the source main base station, the user terminal sends MCG failure information to the source secondary base station connected to the source main base station, and the source secondary base station forwards the MCG failure information to the source main base station.
When the source main base station receives the MCG failure information sent by the user terminal, the main base station switching of the user terminal is determined according to the latest channel measurement report of the user terminal, and the target main base station is used as a switching object. The source main base station sends a switching request message to the target main base station, and the switching request message uses the indication information that the Cause information element indicates that the user terminal has MCG failure in the source main base station, so that the target main base station knows that the switching is caused by the MCG failure and belongs to emergency, and needs to immediately switch the main base station to complete the admission control of the user terminal. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
In addition, the handover request message may also carry information of the source secondary base station, so that the target primary base station may select the source secondary base station as the target secondary base station when selecting the target secondary base station, thereby maintaining uninterrupted data transmission between the user terminal and the network side.
And if the source main base station determines not to perform main base station switching according to the channel measurement report, transmitting the MCG failure indication information to the source auxiliary base station, so that the source auxiliary base station determines the RRM decision according to the MCG failure indication information.
In the embodiment provided by the present invention, when the source host base station communicates with the target host base station via the X2 or Xn interface, the MCG failure indication information is an information element added to the handover request information.
Please refer to table 2, which is a definition of the added ie in the HANDOVER REQUEST message (HANDOVER REQUEST).
TABLE 2
Figure BDA0001969397690000141
In table 2, MCG Failure indication is the name of the added ie, and O represents the operation.
For example, when the user terminal has MCG failure at the source main base station, the user terminal sends MCG failure information to the source secondary base station connected to the source main base station, and the source secondary base station forwards the MCG failure information to the source main base station.
When the source main base station receives the MCG failure information sent by the user terminal, the main base station switching of the user terminal is determined according to the latest channel measurement report of the user terminal, and the target main base station is used as a switching object. The method comprises the steps that a source main base station sends a switching request message to a target main base station, and a newly added information element (MCG Failure indication) is used as indication information for indicating that MCG Failure occurs in the source main base station by a user terminal in the switching request message, so that the target main base station knows that the switching is caused by the MCG Failure and belongs to an emergency situation, main base station switching needs to be carried out immediately, and admission control of the user terminal is completed. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
In addition, the handover request message may also carry information of the source secondary base station, so that the target primary base station may select the source secondary base station as the target secondary base station when selecting the target secondary base station, thereby maintaining uninterrupted data transmission between the user terminal and the network side.
After the source main base station transmits the indication information recognized by the MCG to the target main base station, the target main base station has processed the following.
Referring to fig. 5, based on the same inventive concept, an embodiment of the present invention provides a method for processing connection failure in a dual-connectivity system, where the method is applied to a target primary base station, and the target primary base station and a target secondary base station are connected to form the dual-connectivity system, where the method includes:
step 501: receiving a switching request message sent by a source main base station; wherein, the switching request message carries the indication information that the user terminal has failed MCG in the source main base station.
Step 502: and switching the main base station of the user terminal from the source main base station to the target main base station based on the switching request message.
After the target main base station receives the switching request message sent by the source main base station, the target main base station knows that the switching is caused by MCG failure and belongs to an emergency according to the indication information of the MCG failure of the user terminal in the source main base station carried in the switching request message, and needs to immediately perform main base station switching on the user terminal to complete the admission control of the user terminal. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
Optionally, after receiving the handover request message sent by the source main base station, the source auxiliary base station connected to the source main base station may be further selected as the target auxiliary base station of the target main base station.
Because the information of the source auxiliary base station is also carried in the switching request information, the target main base station can select the source auxiliary base station as the target auxiliary base station when selecting the target auxiliary base station, thereby maintaining that the data transmission between the user terminal and the network side is not interrupted.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information. Or, the MCG failure indication information is an information element added in the handover request information.
The definition of the cause information element and the newly added information element in the handover request message, and the example are already introduced during the process of introducing the source primary base station side, and therefore are not described herein again.
In order to make those skilled in the art fully understand the scheme provided by the implementation of the present invention, the following describes in detail the handover procedure when the MCG failure occurs in the ue, and please refer to fig. 6 for a specific handover procedure:
step 601: and the user terminal sends MCG failure information to the source secondary base station.
Step 602: and the source auxiliary base station forwards MCG failure information to the source main base station.
After receiving the MCG failure information sent by the user terminal, the source secondary base station does not analyze the MCG failure information, but transmits the MCG failure information to the source primary base station through an RRC message.
Step 603: and the source main base station sends a switching request message to the target main base station, wherein the switching request message carries the indication information of MCG failure.
Wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station. The MCG failure indication information may be indicated by a cause information element or a newly added information element in the handover request message.
If the source main base station determines to switch the main base station of the user terminal according to the channel measurement information of the user terminal and the MCG failure indication information, the target main base station is selected as a switching object, and a switching process is initiated to the target main base station.
Step 604: the target main base station transmits a source secondary base station to the target secondary base station to add a request of the target secondary base station.
Step 605: and the source auxiliary base station returns a response message for adding the target auxiliary base station to the target main base station.
Through step 604 and step 605, the target primary base station determines to select the source secondary base station as the newly added target secondary base station according to the information of the source secondary base station and the indication information of MCG failure, which are carried in the handover request message.
Step 606: and the target main base station feeds back switching completion information to the source main base station.
Step 607: the source master base station transmits a request for releasing the source secondary base station to the source secondary base station.
Step 608: and the source auxiliary base station returns a response message for releasing the source auxiliary base station to the source main base station.
The source master base station is caused to initiate a release procedure of the source secondary base station to the source secondary base station through step 607 and step 608.
Step 609 a: the source primary base station transmits an RRC reconfiguration message to the source secondary base station.
Step 609 b: and the source auxiliary base station forwards the RRC reconfiguration message to the user terminal.
Through step 609a and step 609b, the source main base station sends an RRC reconfiguration message to the user terminal through the source auxiliary base station, so that the user terminal is switched from the source main base station to the target main base station.
Step 610: and the user terminal and the target main base station finish random access.
Step 611: and the user terminal sends the RRC reconnection completing information to the target main base station.
Step 612: and the target main base station sends the completion of the reconfiguration of the target secondary base station to the target secondary base station (namely the source secondary base station).
The user terminal initiates random access through steps 610 to 612, and sends a reconfiguration complete message to the target main base station after success.
Step 613: and the source main base station sends the auxiliary base station state forward to the target main base station.
Step 614: and the service gateway completes data forwarding with the target main base station through the source main base station.
And initiating a data forwarding process by the source main base station side through step 613 and step 614, and transferring the relevant data of the user terminal to the target main base station.
Step 615: the target main base station sends a path switching request to the core network.
Step 616: the core network carries out bearing modification on the service gateway.
Step 617 a: the serving gateway establishes a new path with the target primary base station.
Step 617 b: the serving gateway establishes a new path with the target secondary base station (i.e., the source secondary base station).
Step 618: the core network sends a path switching request confirmation to the target main base station.
Through steps 616 to 618, the update of the user plane data channel is completed.
Step 619: the target master base station sends the user terminal context release to the source base station.
Step 620: the source primary base station sends the user terminal context release to the source secondary base station.
The source side deletes the user terminal context through step 615 and step 620. And finally, switching the main base station of the user terminal from the source main base station to the target main base station.
Referring to fig. 7, the ue is in dual connectivity, the primary base station is eNB1 (i.e., a source primary base station), and the secondary base station is a gNB2 (i.e., a source secondary base station). The user terminal has MCG FAILURE at the source main base station, and the user terminal notifies the original main base station of MCG FAILURE (i.e. MCG FAILURE) through SPLIT SRB. The source-master base station decides to keep the current state. The processing flow at this time is as follows:
step 701: and the user terminal sends MCG failure information to the source secondary base station.
Step 702: and the source auxiliary base station forwards MCG failure information to the source main base station.
Specifically, the source secondary base station transmits MCG failure information to the source primary base station through RRC information transmission.
Step 703: the source main base station transmits the indication information of the MCG failure to the source secondary base station.
After the source main base station receives MCG failure information sent by the user terminal, the main base station of the user terminal is determined not to be switched according to a channel measurement report of the user terminal, and the current state is kept, so that MCG failure indication information is sent to the source auxiliary base station, the user terminal is enabled to continue to carry out data transmission with the source auxiliary base station, and the process that the source auxiliary base station initiates bearing change or source auxiliary base station release is avoided.
Based on the same inventive concept, an embodiment of the present invention provides an apparatus for processing connection failure in a dual connectivity system, where a specific implementation of a method for processing connection failure in a dual connectivity system of the apparatus can refer to the description of the embodiment of the side method of the primary base station, and repeated descriptions thereof are omitted, as shown in fig. 8, and the apparatus includes:
a receiving unit 801, configured to receive a MCG failure message sent by a user equipment, and a channel measurement report of the user equipment;
a determining unit 802, configured to determine whether to perform a primary base station handover for the user equipment based on the channel measurement report;
a processing unit 803, configured to send a handover request message to a target primary base station if it is determined that the primary base station handover is performed for the user terminal; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
Optionally, after determining whether to perform a main base station handover on the user terminal, the processing unit 803 is further configured to:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
Based on the same inventive concept, an embodiment of the present invention provides an apparatus for processing connection failure in a dual connectivity system, where a specific implementation manner of a method for processing connection failure in a dual connectivity system of the apparatus may refer to the description of the embodiment of the method at the target primary base station side, and repeated details are not described herein, please refer to fig. 9, and the apparatus includes:
a receiving unit 901, configured to receive a handover request message sent by a source master base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
a switching unit 902, configured to switch, based on the switching request message, a master base station of the user terminal from the source master base station to the target master base station.
Optionally, after receiving the handover request message sent by the source master base station, the handover unit 902 is further configured to:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
As shown in fig. 10, an apparatus for processing connection failure in a dual connectivity system according to an embodiment of the present invention is applied to a source master base station, where the source master base station and a source secondary base station are connected to form a dual connectivity system, and the apparatus includes: a processor 1001, a memory 1002, and a transceiver 1003;
the processor 1001 is configured to read a program in the memory 1002 and execute the following processes:
receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal;
determining whether to perform a master base station handover for the user terminal based on the channel measurement report;
if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
Optionally, after determining whether to perform a main base station handover on the user terminal, the processor 1001 is further configured to:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations. The transceiver 1003 is used for receiving and transmitting data under the control of the processor 1001.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors 1001, as represented by the processor 1001, and various circuits of the memory 1002, as represented by the memory 1002, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 1001, or implemented by the processor 1001. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The processor 1001 may be a general purpose processor 1001, a digital signal processor 1001, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. The general purpose processor 1001 may be a microprocessor 1001 or any conventional processor 1001 or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by the hardware processor 1001, or may be implemented by a combination of hardware and software modules in the hardware processor 1001. The software modules may be located in the ram 1002, flash memory, rom 1002, prom 1002 or eeprom 1002, registers or other storage media as is known in the art. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the signal processing flow in combination with the hardware thereof.
As shown in fig. 11, an apparatus for processing connection failure in a dual connectivity system according to an embodiment of the present invention is applied to a target primary base station, where the target primary base station and a target secondary base station are connected to form a dual connectivity system, and the apparatus includes: a processor 1101, a memory 1102, and a transceiver 1103;
the processor 1101 is configured to read the program in the memory 1102 and execute the following processes:
receiving a switching request message sent by a source main base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
and switching the main base station of the user terminal from the source main base station to the target main base station based on the switching request message.
Optionally, after receiving the handover request message sent by the source master base station, the processor 1101 is further configured to:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is a cause information element in the handover request information.
Optionally, when the source host base station communicates with the target host base station through an X2 or an Xn interface, the MCG failure indication information is an information element newly added in the handover request information.
The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1102 may store data used by the processor 1101 in performing operations. The transceiver 1103 is used for receiving and transmitting data under the control of the processor 1101.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors 1101, represented by processor 1101, and various circuits of memory 1102, represented by memory 1102, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1102 may store data used by the processor 1101 in performing operations.
The process disclosed by the embodiment of the invention can be applied to the processor 1101, or can be implemented by the processor 1101. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1101. The processor 1101 may be a general purpose processor 1101, a digital signal processor 1101, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. The general purpose processor 1101 may be a microprocessor 1101 or any conventional processor 1101 or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the hardware processor 1101, or in a combination of the hardware and software modules in the processor 1101. The software modules may be located in ram 1102, flash memory, rom 1102, prom 1102 or eeprom 1102, registers or other storage media as is known in the art. The storage medium is located in the memory 1102, and the processor 1101 reads the information in the memory 1102 and completes the steps of the signal processing flow in conjunction with the hardware thereof.
Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium, including:
the computer-readable storage medium stores computer instructions that, when executed on a computer, cause the computer to execute the method of handling connection failure in a dual connectivity system of a source master base station side or a target master base station side as described above.
In the embodiment provided by the invention, after receiving the MCG failure information of the main service cell set sent by the user terminal and the channel measurement report of the user terminal; the method comprises the steps that a source main base station in the dual-connection system determines whether to perform main base station switching on a user terminal or not based on a channel measurement report; if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure at the source main base station. Therefore, the user terminal is switched from the source main base station to the target main base station in time, and the user terminal can maintain the connection with the network side.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (19)

1. A method for processing connection failure in a dual-connectivity system is applied to a source master base station, wherein the source master base station and a source secondary base station are connected to form the dual-connectivity system, and the method comprises the following steps:
receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal;
determining whether to perform a master base station handover for the user terminal based on the channel measurement report;
if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
2. The method of claim 1, wherein after determining whether to perform a primary base station handover for the user terminal, further comprising:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
3. The method according to claim 1, wherein the MCG failure indication information is a cause information element in the handover request information when the source-master base station communicates with the target-master base station through an X2 or Xn interface.
4. The method of claim 1, wherein the MCG failure indication information is an information element newly added to the handover request information when the source-master base station communicates with the target-master base station through an X2 or Xn interface.
5. A method for processing connection failure in a dual-connection system is applied to a target main base station, wherein the target main base station and a target secondary base station are connected to form the dual-connection system, and the method comprises the following steps:
receiving a switching request message sent by a source main base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
and switching the main base station of the user terminal from the source main base station to the target main base station based on the switching request message.
6. The method of claim 5, wherein after receiving the handover request message sent by the source-master base station, further comprising:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
7. The method according to claim 5 or 6, wherein the MCG failure indication information is a cause information element in the handover request information when the source-master base station communicates with the target-master base station through an X2 or Xn interface.
8. The method of claim 5 or 6, wherein the MCG failure indication information is an information element newly added to the handover request information when the source-master base station and the target-master base station communicate via an X2 or Xn interface.
9. An apparatus for processing connection failure in a dual connectivity system, applied to a source master base station, the source master base station and a source secondary base station being connected to form the dual connectivity system, comprising:
a receiving unit, configured to receive MCG failure information of a main serving cell set sent by a user equipment, and a channel measurement report of the user equipment;
a determining unit, configured to determine whether to perform a primary base station handover for the user terminal based on the channel measurement report;
the processing unit is used for sending a switching request message to a target main base station if the user terminal is determined to be switched to the main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
10. An apparatus for processing connection failure in a dual connectivity system, applied to a target primary base station, where the target primary base station and a target secondary base station are connected to form the dual connectivity system, the apparatus comprising:
a receiving unit, configured to receive a handover request message sent by a source master base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
a switching unit, configured to switch the master base station of the user terminal from the source master base station to the target master base station based on the switching request message.
11. An apparatus for processing connection failure in a dual connectivity system, applied to a source master base station, the source master base station and a source secondary base station being connected to form the dual connectivity system, the apparatus comprising: a processor, a memory, and a transceiver;
the processor is used for reading the program in the memory and executing the following processes:
receiving MCG failure information of a main service cell set sent by a user terminal and a channel measurement report of the user terminal;
determining whether to perform a master base station handover for the user terminal based on the channel measurement report;
if the user terminal is determined to be switched to the main base station, sending a switching request message to a target main base station; wherein, the switching request message carries indication information for indicating that the user terminal has MCG failure in the source main base station.
12. The apparatus of claim 11, wherein after determining whether to perform a master base station handover for the user terminal, the processor is further configured to:
and if the user terminal is determined not to be subjected to main base station switching, sending the MCG failure indication information to the source auxiliary base station.
13. The apparatus according to claim 11, wherein the MCG failure indication information is a cause information element in the handover request information when the source-master base station communicates with the target-master base station through an X2 or Xn interface.
14. The apparatus of claim 11, wherein the MCG failure indication information is an information element newly added to the handover request information when the source-master base station communicates with the target-master base station over an X2 or Xn interface.
15. An apparatus for processing connection failure in a dual connectivity system, applied to a target primary base station, the target primary base station and a target secondary base station being connected to form the dual connectivity system, the apparatus comprising: a processor, a memory, and a transceiver;
the processor is used for reading the program in the memory and executing the following processes:
receiving a switching request message sent by a source main base station; wherein, the switching request message carries the indication information that the user terminal has MCG failure in the source main base station;
and switching the main base station of the user terminal from the source main base station to the target main base station based on the switching request message.
16. The apparatus of claim 15, wherein after receiving the handover request message sent by the source master base station, the processor is further configured to:
and selecting the source auxiliary base station connected with the source main base station as a target auxiliary base station of the target main base station.
17. The apparatus according to claim 15 or 16, wherein the MCG failure indication information is a cause information element in the handover request information when the source-master base station communicates with the target-master base station over an X2 or Xn interface.
18. The apparatus of claim 15 or 16, wherein the MCG failure indication information is an information element newly added to the handover request information when the source-master base station communicates with the target-master base station through an X2 or Xn interface.
19. A computer-readable storage medium characterized by:
the computer readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-8.
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