WO2020063442A1 - 双连接切换方法、终端及网络设备 - Google Patents

双连接切换方法、终端及网络设备 Download PDF

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Publication number
WO2020063442A1
WO2020063442A1 PCT/CN2019/106672 CN2019106672W WO2020063442A1 WO 2020063442 A1 WO2020063442 A1 WO 2020063442A1 CN 2019106672 W CN2019106672 W CN 2019106672W WO 2020063442 A1 WO2020063442 A1 WO 2020063442A1
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WO
WIPO (PCT)
Prior art keywords
configuration information
connection
terminal
handover
dual
Prior art date
Application number
PCT/CN2019/106672
Other languages
English (en)
French (fr)
Inventor
马玥
吴昱民
Original Assignee
维沃移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to EP19867838.5A priority Critical patent/EP3860218B1/en
Priority to JP2021517644A priority patent/JP7139523B2/ja
Priority to ES19867838T priority patent/ES2958288T3/es
Publication of WO2020063442A1 publication Critical patent/WO2020063442A1/zh
Priority to US17/212,720 priority patent/US20210211951A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/083—Reselecting an access point wherein at least one of the access points is a moving node
    • 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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a dual connection switching method, terminal, and network device.
  • the terminal in order to ensure that the terminal does not interrupt communication during the movement, the terminal needs to perform cell switching.
  • the UE can only keep sending and receiving data with a certain network entity. In this way, when the switching process from one network entity to another network entity is performed, the data of the air interface will be interrupted, and the 0ms delay requirement cannot be met.
  • Some embodiments of the present disclosure provide a dual-connection handover method, terminal, and network device to solve the problem that the 0ms delay cannot be achieved during the handover process.
  • some embodiments of the present disclosure provide a dual-connection handover method, applied to a terminal side, including:
  • the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node;
  • some embodiments of the present disclosure further provide a terminal, including:
  • a first receiving module configured to receive a handover command sent by a source node, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node;
  • a first establishing module configured to establish a dual connection with a source node and a target node according to the DC configuration information when the DC configuration information is supported;
  • the switching module is configured to disconnect the connection with the source node in the dual connection and maintain the single connection with the target node according to the SC configuration information.
  • some embodiments of the present disclosure provide a terminal.
  • the terminal includes a processor, a memory, and a computer program stored on the memory and running on the processor.
  • the computer program is executed by the processor, the dual connection switching is implemented. Method steps.
  • some embodiments of the present disclosure provide a dual-connection handover method, which is applied to a network device side, and the network device is a source node, including:
  • a handover command is sent to the terminal, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node.
  • some embodiments of the present disclosure provide a network device, where the network device is a source node and includes:
  • a fifth sending module is configured to send a handover command to the terminal, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node.
  • some embodiments of the present disclosure further provide a network device.
  • the network device includes a processor, a memory, and a computer program stored on the memory and running on the processor.
  • the processor executes the computer program, the foregoing dual-system is implemented. Steps of the connection switching method.
  • some embodiments of the present disclosure provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the dual-connection switching method described above.
  • the terminal first establishes a dual connection between the source node and the target node according to the DC configuration information, and then disconnects the source node connection in the dual connection according to the SC configuration information to switch to the target node Single connection, which can support the connection configuration in the DC HO process, and ensure that the DC HO process runs normally, so as to meet the 0ms terminal delay requirement during terminal movement.
  • Figure 1 shows a schematic diagram of the network architecture of MCG bearer and SCG bearer
  • FIG. 2 is a schematic diagram of a network architecture with separated bearers
  • FIG. 3 is a schematic diagram of a network architecture of replication bearer
  • FIG. 4 is a schematic flowchart of a dual-connection handover method on a terminal side in some embodiments of the present disclosure
  • FIG. 5a is a schematic flowchart of a dual-connection handover method in some embodiments of the present disclosure
  • FIG. 5b is a schematic diagram of a timing sequence for validating DC configuration information and SC configuration information in a handover command
  • FIG. 6 is a schematic diagram of a module structure of a terminal in some embodiments of the present disclosure.
  • FIG. 7 shows a block diagram of a terminal in some embodiments of the present disclosure.
  • FIG. 8 is a schematic flowchart of a dual-connection handover method on a network device side in some embodiments of the present disclosure
  • FIG. 9 is a schematic structural diagram of a module of a network device in some embodiments of the present disclosure.
  • FIG. 10 shows a block diagram of a network device in some embodiments of the present disclosure.
  • the terminal In order to meet the interruption delay of the 0ms mobility process, the terminal needs to have a connection between the source node and the target node during the movement process to ensure the transmission and reception of data.
  • DC HO Dual Connectivity
  • SC Single Connectivity
  • the DC architecture includes a master cell group (MCG) and a secondary cell group (SCG).
  • MCG master node
  • SCG secondary cell group
  • MCG master node
  • MN master node
  • MN master node
  • SCG secondary node
  • SCell secondary cell
  • SCG primary cell
  • SCell secondary cell
  • PSCell primary cell
  • SpCell secondary cell
  • the DC architecture supports the packet data convergence protocol (PDCP) replication function.
  • the DC architecture also supports different types of bearer types, including MCG bearer, SCG bearer, and SCG bearer. , Split bearer (Split bearer) and duplicate bearer (Duplicate bearer).
  • MCG bearer corresponds to PDCP, Radio Link Control (RLC), and Medium Access Control (MAC) entities.
  • RLC Radio Link Control
  • MAC Medium Access Control
  • the SCG bearer corresponds to PDCP, RLC, and MAC entities.
  • the PDCP entities corresponding to the separated bearers are in one cell group, and the corresponding two RLC and two MAC entities are in different cell groups.
  • the PDCP entity corresponding to the replication bearer, two RLCs, and two MAC entities are in a cell group.
  • Some embodiments of the present disclosure provide a dual-connection handover method, which is applied to a terminal side. As shown in FIG. 4, the method includes the following steps:
  • Step 41 Receive a handover command sent by the source node, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node.
  • the source node (Source) may be in a handover process: a source base station, a source SN in a DC, and a source MN in a DC.
  • the target node (Target) may be: the target base station.
  • the target node may be the target SN in the DC.
  • the HO handover process can be triggered by the source SN or the source MN, that is, the handover command can be sent by the source SN or the source MN, but the signaling process is the same.
  • the single connection of the target node is a single connection of the target cell.
  • the handover command is carried in a Radio Resource Control (RRC) reconfiguration message, and the RRC reconfiguration message has a first service identifier (transaction ID).
  • the first service identifier is an ID of an RRC reconfiguration message.
  • the DC configuration information and / or SC configuration information in the handover command has a second service identifier, and the second service identifier is different from the first service identifier. That is, the DC configuration information and the SC configuration information may have their respective second service identifiers, or they may share a second service identifier. The second service identifier is different from the first service identifier of the RRC reconfiguration message.
  • Step 42 When DC configuration information is supported, according to the DC configuration information, a dual connection with the source node and the target node is established.
  • the terminal can accept the DC configuration information and apply it.
  • the source node acts as the MN in the DC
  • the target node is added as the SN according to the DC configuration information.
  • the connection between the terminal and the target node is increased, thereby establishing a connection Double connection.
  • the terminal can send and receive data in the connection between the source node and the target node at the same time, ensuring uninterrupted data transmission.
  • Step 43 According to the SC configuration information, disconnect the connection with the source node in the dual connection and maintain the single connection with the target node.
  • the switch command also carries SC configuration information
  • the target node is converted into the MN role in the DC, the connection between the dual connection and the source node is disconnected, and only the connection with the SC configuration information is maintained.
  • Single connection between target nodes In this way, the dual connection between the source node and the target node is established according to the DC configuration information, and then the source node in the dual connection is disconnected according to the SC configuration information, and only a single connection with the target node is maintained, so that the source node is switched to The process of the target node. In this process, the terminal is always connected to the network side, no data transmission interruption will occur, and it can reach the 0ms transmission delay requirement.
  • the method further includes: when the DC configuration information is not supported, sending a rejection message to the source node to reject the DC configuration information, so that the source node performs a single connection handover process according to the rejection message.
  • the terminal may not support DC configuration information due to its own terminal capabilities or other reasons.
  • the terminal sends a reject message to the source node to reject the DC configuration information.
  • the source node receives the rejection message, it can perform the single-connection handover process, that is, the traditional handover process.
  • the terminal disconnects from the source node and establishes a connection with the target node. During this process, there may be short-term data transmission delays.
  • the method further includes: sending first confirmation information to the source node according to the handover command, wherein the confirmation information is used to confirm at least one of the following:
  • the first confirmation information may only confirm one of the above information. For example, when the terminal receives a handover command, it sends back an acknowledgment (ACKnowledgement, ACK) to the source node. When it does not receive the handover command, it returns a negative response to the source node. Acknowledgement (Negative-ACKnowledgment, NACK).
  • ACK acknowledgment
  • NACK Negative-ACKnowledgment
  • the terminal detects that the DC configuration information / SC configuration information is valid, that is, the terminal's capability supports various configuration parameters in the DC configuration information / SC configuration information, the terminal feeds back an ACK to the source node, and detects the DC configuration / SC When the configuration information is invalid, that is, when the capability of the terminal does not support at least one configuration parameter in the DC configuration information / SC configuration information, a NACK is fed back to the source node.
  • the terminal successfully establishes a dual connection with the source node and the target node, the terminal feeds back an ACK to the source node; when the dual connection establishment fails, it returns a NACK to the source node.
  • the terminal when the terminal successfully applies the SC configuration information, that is, when the terminal can establish a single connection with the target node, the terminal feeds back an ACK to the source node; when the SC configuration information cannot be successfully applied, it feeds back a NACK to the source node.
  • the first confirmation information may jointly confirm any combination of the above types of information, for example, the first confirmation information jointly confirms whether a switching command is received and whether the DC configuration information is valid. Other combinations in the above information can also be jointly confirmed by the first confirmation information, which will not be enumerated here one by one.
  • the information that can be confirmed by the first confirmation information is different, and the feedback timing is different.
  • the sending timing of the first confirmation message is after step 41.
  • the sending timing of the first confirmation information is after step 42.
  • a plurality of types of the above information may be individually confirmed through respective confirmation information.
  • the method includes: sending first confirmation information to the source node according to the handover command, where the first confirmation information is used to confirm whether a handover command is received.
  • the method further includes: sending the second confirmation information that the dual connection is established to the source node and / or the target node. The second confirmation information is used to confirm whether the dual connection is successfully established.
  • the method further includes: sending a handover completion message to the target node, where the handover completion message is used to indicate at least one of the following: the SC configuration information has been applied, and the handover is completed.
  • the target node receives the handover completion message, it informs the source node that the SC configuration information is effective, and the original DC configuration information can be deleted.
  • the dual connection switching method includes the following steps:
  • Step 51 The terminal performs wireless measurement on a wireless channel with the source node, and reports a measurement report to the source node.
  • Step 52 When the measurement report indicates that the channel quality is poor and a channel switching is required, the source node sends a switching request to the target node.
  • the handover request carries configuration information of the source node under a single connection and configuration information under a dual connection. That is, the source node informs the target node of the configuration of the node and the configuration that the node may want under the DC.
  • Step 53 The source node receives a handover request response from the target node, where the handover request response carries: DC configuration information and SC configuration information.
  • the target node generates two pieces of configuration information according to the handover request sent by the source node (the configuration of this node and the configuration that the node may want under DC): the DC configuration information used in the DC HO process, and after accessing the target cell SC configuration information.
  • Step 54 The source node sends an RRC reconfiguration message to the terminal, and the RRC reconfiguration message carries a handover command.
  • the terminal may send a first confirmation message to the source node for confirming whether the terminal successfully received the handover command, whether the DC configuration information is valid, whether the SC configuration information is valid, whether the dual connection is successfully established, and whether the SC configuration information is applied One or more of them.
  • the terminal Before step 54, the terminal always maintains a connection with the source node. At this time, data can be transmitted between the terminal and the source node.
  • Step 55 The terminal applies DC configuration information to establish a dual connection with the source node and the target node. At this time, the connection between the terminal and the source node is maintained, and data can be transmitted between the terminal and the source node. The terminal and the target node also remain connected, and data can be transmitted between the terminal and the target node.
  • Step 56 The terminal applies the SC configuration information to disconnect the connection with the source node and only maintains the connection with the target node.
  • the terminal may send the disconnection indication information to the source node; the source node may send the disconnection indication information to the target node.
  • the terminal may send instruction information to disconnect the source node to the target node, and the target node may send instruction information to the source node to disconnect.
  • the terminal can immediately apply the DC configuration information and store the SC configuration information.
  • the SC configuration information of the target node can be packaged in a message in the form of a container (or in the form of explicit cells, which mainly include the physical layer, layer two, and layer three configurations of the SC, etc.).
  • the SC configuration information is applied to disconnect the connection with the source node and only maintain the connection with the target node.
  • the terminal successfully receives and demodulates the RRC reconfiguration message at time t1, immediately applies DC configuration information to establish a dual connection, and stores SC configuration information.
  • the SC configuration is applied at time t2 after the dual connection establishment is completed, the connection with the source node is disconnected, and the process of switching to the target node is completed.
  • Step 57 The terminal sends a handover completion message to the target node.
  • the terminal during the handover process, the terminal first establishes a dual connection between the source node and the target node according to the DC configuration information, and then disconnects the source node connection in the dual connection according to the SC configuration information. Switch to a single connection of the target node. This can support the connection configuration in the DC HO process and ensure that the DC HO process runs normally, thereby meeting the 0ms terminal delay requirement during the terminal movement process.
  • the terminal 600 in some embodiments of the present disclosure can implement receiving the handover command sent by the source node in the foregoing embodiment, where the handover command carries: dual-connection DC configuration information of the source node and the target node, And single-node SC configuration information of the target node; when DC configuration information is supported, based on the DC configuration information, a dual connection with the source node and the target node is established; according to the SC configuration information, the connection with the source node is disconnected in the dual connection
  • the terminal 600 specifically includes the following functional modules:
  • the first receiving module 610 is configured to receive a handover command sent by a source node, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node;
  • a first establishing module 620 configured to establish a dual connection with the source node and the target node according to the DC configuration information
  • the switching module 630 is configured to disconnect the connection with the source node in the dual connection and maintain the single connection with the target node according to the SC configuration information.
  • the terminal 600 further includes:
  • the first sending module is configured to send a rejection message that rejects the DC configuration information to the source node when the DC configuration information is not supported, so that the source node executes a single connection switching process according to the rejection message.
  • the terminal 600 further includes:
  • the second sending module is configured to send the first confirmation information to the source node according to the handover command, wherein the first confirmation information is used to confirm at least one of the following:
  • the terminal also includes:
  • the third sending module is configured to send the second confirmation information that the dual connection is established to the source node and / or the target node.
  • the terminal 600 further includes:
  • a fourth sending module is configured to send a handover complete message to the target node, where the handover complete message is used to indicate at least one of the following:
  • the switch is complete.
  • the handover command is carried in a radio resource control RRC reconfiguration message, and the RRC reconfiguration message has a first service identifier.
  • the DC configuration information and / or SC configuration information has a second service identifier, and the second service identifier is different from the first service identifier.
  • the terminal of some embodiments of the present disclosure first establishes a dual connection between the source node and the target node according to the DC configuration information, and then disconnects the source node connection in the dual connection according to the SC configuration information to switch. It is a single connection of the target node, which can support the connection configuration in the DC HO process, and ensure that the DC HO process runs normally, so as to meet the 0ms terminal delay requirement during the terminal movement process.
  • FIG. 7 is a schematic diagram of a hardware structure of a terminal that implements various embodiments of the present disclosure.
  • the terminal 70 includes, but is not limited to, a radio frequency unit 71, a network module 72, an audio output unit 73, The input unit 74, the sensor 75, the display unit 76, the user input unit 77, the interface unit 73, the memory 79, the processor 710, and the power source 711 and other components.
  • the terminal structure shown in FIG. 7 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or some components may be combined, or different component arrangements.
  • the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a car terminal, a wearable device, a pedometer, and the like.
  • the radio frequency unit 71 is configured to receive a handover command sent by a source node, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node;
  • the processor 710 is configured to, when supporting the DC configuration information, establish a dual connection with the source node and the target node according to the DC configuration information;
  • the terminal first establishes a dual connection between the source node and the target node according to the DC configuration information, and then disconnects the source node connection in the dual connection according to the SC configuration information to switch to the single node of the target node.
  • the connection can support the connection configuration in the DC HO process and ensure that the DC HO process runs normally, thereby meeting the 0ms terminal delay requirement during the terminal movement process.
  • the radio frequency unit 71 may be used to receive and send signals during the process of transmitting and receiving information or during a call. Specifically, the downlink data from the base station is received and processed by the processor 710; To send uplink data to the base station.
  • the radio frequency unit 71 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency unit 71 can also communicate with a network and other devices through a wireless communication system.
  • the terminal provides users with wireless broadband Internet access through the network module 72, such as helping users to send and receive email, browse web pages, and access streaming media.
  • the audio output unit 73 may convert audio data received by the radio frequency unit 71 or the network module 72 or stored in the memory 79 into audio signals and output them as sound. Moreover, the audio output unit 73 may also provide audio output (for example, call signal reception sound, message reception sound, etc.) related to a specific function performed by the terminal 70.
  • the audio output unit 73 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 74 is used to receive audio or video signals.
  • the input unit 74 may include a graphics processing unit (Graphics Processing Unit, GPU) 741 and a microphone 742.
  • the graphics processor 741 pairs images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode Data is processed.
  • the processed image frames may be displayed on the display unit 76.
  • the image frames processed by the graphics processor 741 may be stored in the memory 79 (or other storage medium) or transmitted via the radio frequency unit 71 or the network module 72.
  • the microphone 742 can receive sound, and can process such sound into audio data.
  • the processed audio data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 71 in the case of a telephone call mode and output.
  • the terminal 70 further includes at least one sensor 75, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 761 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 761 and / or when the terminal 70 is moved to the ear. Or backlight.
  • an accelerometer sensor can detect the magnitude of acceleration in various directions (usually three axes).
  • sensor 75 can also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared The sensors and the like are not repeated here.
  • the display unit 76 is used to display information input by the user or information provided to the user.
  • the display unit 76 may include a display panel 761, and the display panel 761 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 77 may be used to receive inputted numeric or character information, and generate key signal inputs related to user settings and function control of the terminal.
  • the user input unit 77 includes a touch panel 771 and other input devices 772.
  • the touch panel 771 also known as a touch screen, can collect user's touch operations on or near it (such as the user using a finger, stylus, etc. any suitable object or accessory on the touch panel 771 or near the touch panel 771 operating).
  • the touch panel 771 may include two parts, a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, and detects the signal caused by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into contact coordinates, and sends it To the processor 710, receive the command sent by the processor 710 and execute it.
  • various types such as resistive, capacitive, infrared, and surface acoustic wave can be used to implement the touch panel 771.
  • the user input unit 77 may further include other input devices 772.
  • other input devices 772 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.
  • the touch panel 771 may be overlaid on the display panel 761.
  • the touch panel 771 detects a touch operation on or near the touch panel 771, it is transmitted to the processor 710 to determine the type of the touch event.
  • the type of event provides corresponding visual output on the display panel 761.
  • the touch panel 771 and the display panel 761 are implemented as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 771 and the display panel 761 may be integrated and Implement the input and output functions of the terminal, which are not limited here.
  • the interface unit 73 is an interface through which an external device is connected to the terminal 70.
  • the external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, and audio input / output (I / O) port, video I / O port, headphone port, and more.
  • the interface unit 73 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 70 or may be used to connect the terminal 70 and the external device. Transfer data.
  • the memory 79 may be used to store software programs and various data.
  • the memory 79 may mainly include a storage program area and a storage data area, where the storage program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), etc .; the storage data area may store data according to Data (such as audio data, phone book, etc.) created by the use of mobile phones.
  • the memory 79 may include a high-speed random access memory, and may further include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 710 is a control center of the terminal, and uses various interfaces and lines to connect various parts of the entire terminal.
  • the processor 710 runs or executes software programs and / or modules stored in the memory 79 and calls data stored in the memory 79 to execute Various functions and processing data of the terminal, so as to monitor the terminal as a whole.
  • the processor 710 may include one or more processing units; optionally, the processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and an application program, etc.
  • the tuning processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 710.
  • the terminal 70 may further include a power source 711 (such as a battery) for supplying power to various components.
  • a power source 711 such as a battery
  • the power source 711 may be logically connected to the processor 710 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. And other functions.
  • the terminal 70 includes some functional modules that are not shown, and details are not described herein again.
  • some embodiments of the present disclosure further provide a terminal, including a processor 710, a memory 79, and a computer program stored on the memory 79 and executable on the processor 710.
  • the computer program is processed by the processor 710.
  • the terminal may be a wireless terminal or a wired terminal.
  • the wireless terminal may be a device that provides voice and / or other business data connectivity to the user, a handheld device with a wireless connection function, or other processing equipment connected to a wireless modem.
  • a wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the wireless terminal can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal
  • a mobile terminal such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal
  • it can be a portable, compact, handheld, computer-built or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a wireless terminal can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a mobile station, a remote station, a remote terminal,
  • the access terminal Access terminal
  • user terminal User terminal
  • user agent User agent
  • user equipment User Equipment
  • Some embodiments of the present disclosure also provide a computer-readable storage medium.
  • a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, each process of the foregoing dual-connection switching method embodiment is implemented, and can achieve The same technical effects are omitted here to avoid repetition.
  • the computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • a dual-connection handover method of some embodiments of the present disclosure is applied to a network device side, where the network device is a source node, and the method includes the following steps:
  • Step 81 Send a handover command to the terminal, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node.
  • the target node When the source node is a source base station, the target node may be: the target base station. When the source node is the source SN or MN in the DC, the target node may be the target SN in the DC.
  • the handover command is carried in a radio resource control RRC reconfiguration message, and the RRC reconfiguration message has a first service identifier (transaction ID).
  • the first service identifier is an ID of an RRC reconfiguration message.
  • the DC configuration information and / or SC configuration information in the handover command has a second service identifier, and the second service identifier is different from the first service identifier. That is, the DC configuration information and the SC configuration information may have their respective second service identifiers, or they may share a second service identifier.
  • the second service identifier is different from the first service identifier of the RRC reconfiguration message.
  • the method further includes: sending a handover request to the target node, and receiving a handover request response fed back by the target node.
  • the handover request carries configuration information of the source node under a single connection and the configuration information under dual connectivity; the handover request response carries: DC configuration information and SC configuration information.
  • the target node generates two pieces of configuration information according to the handover request sent by the source node (the configuration of this node and the configuration that the node may want under DC): the DC configuration information used in the DC HO process, and after accessing the target cell SC configuration information.
  • the method further includes: receiving a rejection message sent by the terminal, and performing a single connection switching process according to the rejection message.
  • the rejection message is used to instruct the terminal to reject the DC configuration information.
  • the terminal may not support DC configuration information due to its own terminal capabilities or other reasons.
  • the terminal sends a rejection message to the source node to reject the DC configuration information.
  • the source node After the source node receives the rejection message, it can perform the single-connection handover process, that is, the traditional handover process.
  • step 81 the method further includes: receiving first confirmation information sent by the terminal; wherein the first confirmation information is used to confirm at least one of the following:
  • the first confirmation information may confirm only one of the above information, and the first confirmation information may also jointly confirm any combination of the above types of information. It is worth noting that the information that can be confirmed by the first confirmation information is different, and its feedback The timing is different. For example, when the first confirmation message only confirms whether a switching command is received, the sending timing of the first confirmation message is after step 81. When the first confirmation information is used to jointly determine whether a handover command is received and whether a dual connection is established, the sending timing of the first confirmation information is after the terminal establishes a dual connection with the source node and the target node.
  • the method further includes: sending a first handover confirmation message (confirmation forwarded) to the target node; and receiving a second handover confirmation message fed back by the target node according to the first handover confirmation message.
  • the method further includes: receiving first confirmation information sent by the terminal to indicate that the handover command is received, and after the terminal establishes a dual connection with the source node and the target node, the receiving terminal sends the information for A second confirmation message indicating that a dual connection has been established.
  • the source node sends a handover command carrying DC configuration information and SC configuration information to the terminal, so that during the handover process, the terminal first establishes an origin node and a target according to the DC configuration information.
  • the dual connection of the nodes, and then the source node in the dual connection is disconnected according to the SC configuration information to switch to the single connection of the target node. This can support the connection configuration in the DC HO process and ensure the normal DC HO process to meet the terminal 0ms terminal delay requirement during movement.
  • the network device 900 in some embodiments of the present disclosure can implement a handover command sent to a terminal in the foregoing embodiments, where the handover command carries dual-connection DC configuration information of the source node and the target node, and Details of the single connection SC configuration information method of the target node and achieve the same effect, the network device 900 specifically includes the following functional modules:
  • the fifth sending module 910 is configured to send a handover command to the terminal, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node.
  • the network device 900 further includes:
  • the sixth sending module is configured to send a handover request to the target node, where the handover request carries: configuration information of the source node under a single connection and configuration information under a dual connection;
  • the second receiving module is configured to receive a handover request response fed back by the target node, where the handover request response carries DC configuration information and SC configuration information.
  • the network device 900 further includes:
  • a third receiving module configured to receive a rejection message sent by the terminal, where the rejection message is used to instruct the terminal to reject the DC configuration information
  • a processing module is configured to perform a single connection switching process according to the rejection message.
  • the network device 900 further includes:
  • a fourth receiving module configured to receive the first confirmation information sent by the terminal; wherein the first confirmation information is used to confirm at least one of the following:
  • the network device 900 further includes:
  • a seventh sending module configured to send a first handover confirmation message to the target node
  • a fifth receiving module is configured to receive a second handover confirmation message that is returned by the target node according to the first handover confirmation message.
  • the network device 900 further includes:
  • the sixth receiving module is configured to receive second confirmation information sent by the terminal or the target node and used to indicate that a dual connection has been established.
  • the source node of some embodiments of the present disclosure sends a switching command carrying DC configuration information and SC configuration information to the terminal, so that during the switching process, the terminal first establishes a source node and a target node according to the DC configuration information.
  • the SC configuration information the source node in the dual connection is disconnected to switch to the single connection of the target node. This can support the connection configuration in the DC HO process and ensure the normal DC HO process to meet the terminal movement. 0ms terminal delay requirement in the process.
  • each module of the above network equipment and terminal is only a division of logical functions. In actual implementation, it can be fully or partially integrated into a physical entity, or it can be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be all implemented in hardware; some modules can be implemented in the form of software called by processing elements, and some modules can be implemented in hardware.
  • the determination module may be a separately established processing element, or it may be integrated and implemented in a certain chip of the above device.
  • it may also be stored in the form of a program code in the memory of the above device, and a certain processing element of the above device may be used. Invoke and execute the functions of the above identified modules.
  • each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
  • the above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (ASIC), or one or more microprocessors (digital signal processor (DSP), or one or more Field Programmable Gate Array (FPGA).
  • ASIC application specific integrated circuits
  • DSP digital signal processor
  • FPGA Field Programmable Gate Array
  • the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code.
  • CPU Central Processing Unit
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • an embodiment of the present disclosure further provides a network device.
  • the network device includes a processor, a memory, and a computer program stored on the memory and executable on the processor.
  • the processor executes the computer program.
  • the steps in the dual-connection handover method described above are then implemented.
  • An embodiment of the invention also provides a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the steps of the dual connection switching method described above.
  • an embodiment of the present disclosure also provides a network device.
  • the network device 1000 includes: an antenna 101, a radio frequency device 102, and a baseband device 103.
  • the antenna 101 is connected to a radio frequency device 102.
  • the radio frequency device 102 receives information through the antenna 101 and sends the received information to the baseband device 103 for processing.
  • the baseband device 103 processes the information to be sent and sends it to the radio frequency device 102.
  • the radio frequency device 102 processes the received information and sends it out via the antenna 101.
  • the above-mentioned frequency band processing apparatus may be located in the baseband apparatus 103, and the method performed by the network device in the above embodiments may be implemented in the baseband apparatus 103.
  • the baseband apparatus 103 includes a processor 104 and a memory 105.
  • the baseband device 103 may include, for example, at least one baseband board, and multiple chips are provided on the baseband board, as shown in FIG. 10.
  • One of the chips is, for example, the processor 104 and is connected to the memory 105 to call a program in the memory 105 and execute the program.
  • the network device operations shown in the above method embodiments are operated.
  • the baseband device 103 may further include a network interface 106 for exchanging information with the radio frequency device 102.
  • the interface is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the processor here may be a processor or a collective name for multiple processing elements.
  • the processor may be a CPU, an ASIC, or one or more configured to implement the methods performed by the above network devices.
  • Integrated circuits such as: one or more microprocessor DSPs, or one or more field programmable gate array FPGAs.
  • a storage element may be a single memory or a collective term for multiple storage elements.
  • the memory 105 may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), and an electronic memory. Erase programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDRSDRAM
  • enhanced SDRAM ESDRAM
  • synchronous connection dynamic random access memory Synchronous DRAM, SLDRAM
  • Direct RAMbus RAM Direct RAMbus RAM, DRRAM
  • the memory 105 described herein is intended to include, but is not limited to, these and any other suitable types of memory.
  • the network device further includes: a computer program stored in the memory 105 and executable on the processor 104, and the processor 104 calls the computer program in the memory 105 to execute each module shown in FIG. 8 for execution Methods.
  • the computer program can be used to execute when called by the processor 104: sending a handover command to the terminal, where the handover command carries: dual-connection DC configuration information of the source node and the target node, and single-connection SC configuration information of the target node .
  • the network device may be a Global System (Global System, Mobile, Communication, GSM) or Code Division Multiple Access (CDMA) base station (Base Transceiver Station, BTS), or a broadband code division multiple access (Wideband, Code, Division, Multiple Access, WCDMA) base stations (NodeB, NB) can also be LTE evolutionary base stations (Evolutional NodeB, eNB or eNodeB), or relay stations or access points, or future 5G networks
  • GSM Global System, Mobile, Communication, GSM
  • CDMA Code Division Multiple Access
  • BTS Base Transceiver Station
  • WCDMA Wideband, Code, Division, Multiple Access
  • NodeB, NB can also be LTE evolutionary base stations (Evolutional NodeB, eNB or eNodeB), or relay stations or access points, or future 5G networks
  • LTE evolutionary base stations Evolutional NodeB, eNB or eNodeB
  • relay stations or access points or future 5G networks
  • the source node sends a switching command carrying DC configuration information and SC configuration information to the terminal, so that during the switching process, the terminal first establishes a dual connection between the source node and the target node according to the DC configuration information.
  • the SC configuration information the source node in the dual connection is disconnected to switch to the single connection of the target node. This can support the connection configuration in the DC HO process and ensure that the DC HO process runs normally, so as to meet the 0ms during terminal movement. Terminal delay requirements.
  • the disclosed apparatus and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present disclosure is essentially a part that contributes to the related technology or a part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in various embodiments of the present disclosure.
  • the foregoing storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
  • each component or each step can be disassembled and / or recombined.
  • These decompositions and / or recombinations should be regarded as equivalent solutions of the present disclosure.
  • the steps for performing the series of processes described above can be performed naturally in chronological order in accordance with the described order, but need not necessarily be performed in chronological order, and certain steps can be performed in parallel or independently of each other.
  • it is able to understand all or any steps or components of the methods and devices of the present disclosure and may be implemented in hardware, firmware in any computing device (including a processor, a storage medium, etc.) or a network of computing devices.
  • Software, or a combination thereof which can be achieved by a person of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.
  • the purpose of the present disclosure can also be achieved by running a program or a group of programs on any computing device.
  • the computing device may be a well-known general-purpose device. Therefore, the object of the present disclosure can also be achieved only by providing a program product including a program code that implements the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that, in the apparatus and method of the present disclosure, it is obvious that each component or each step can be disassembled and / or recombined.

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Abstract

本公开公开了一种双连接切换方法、终端及网络设备，其方法包括：接收源节点发送的切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息；当支持DC配置信息时，根据DC配置信息，建立与源节点和目标节点之间的双连接；根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接。

Description

双连接切换方法、终端及网络设备
相关申请的交叉引用
本申请主张在2018年9月27日在中国提交的中国专利申请号No.201811134407.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种双连接切换方法、终端及网络设备。
背景技术
在移动通信系统中，为保证终端在移动过程中不发生通信中断，终端需要进行小区切换。在切换的某一瞬间，UE仅能与某一个网络实体保持数据的发送及接收。这样，当进行从一个网络实体到另一个网络实体的切换过程时将会导致空口的数据中断，无法满足0ms时延要求。
发明内容
本公开的一些实施例提供了一种双连接切换方法、终端及网络设备，以解决切换过程无法实现0ms时延的问题。
第一方面，本公开的一些实施例提供了一种双连接切换方法，应用于终端侧，包括：
接收源节点发送的切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息；
当支持DC配置信息时，根据DC配置信息，建立与源节点和目标节点之间的双连接；
根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接。
第二方面，本公开的一些实施例还提供了一种终端，包括：
第一接收模块，用于接收源节点发送的切换命令，其中，切换命令中携 带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息；
第一建立模块，用于当支持DC配置信息时，根据DC配置信息，建立与源节点和目标节点之间的双连接；
切换模块，用于根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接。
第三方面，本公开的一些实施例提供了一种终端，终端包括处理器、存储器以及存储于存储器上并在处理器上运行的计算机程序，计算机程序被处理器执行时实现上述的双连接切换方法的步骤。
第四方面，本公开的一些实施例提供了一种双连接切换方法，应用于网络设备侧，网络设备为源节点，包括：
向终端发送切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息。
第五方面，本公开的一些实施例提供了一种网络设备，网络设备为源节点，包括：
第五发送模块，用于向终端发送切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息。
第六方面，本公开的一些实施例还提供了一种网络设备，网络设备包括处理器、存储器以及存储于存储器上并在处理器上运行的计算机程序，处理器执行计算机程序时实现上述的双连接切换方法的步骤。
第七方面，本公开的一些实施例提供了一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，计算机程序被处理器执行时实现上述的双连接切换方法的步骤。
这样，本公开的一些实施例的终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
附图说明
为了更清楚地说明本公开的一些实施例的技术方案，下面将对本公开的一些实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示MCG承载和SCG承载的网络架构示意图；
图2表示分离承载的网络架构示意图；
图3表示复制承载的网络架构示意图；
图4表示本公开一些实施例中终端侧的双连接切换方法的流程示意图；
图5a表示本公开一些实施例中双连接切换方法的流程示意图；
图5b表示切换命令中DC配置信息和SC配置信息的生效时序示意图；
图6表示本公开一些实施例中终端的模块结构示意图；
图7表示本公开一些实施例中的终端框图；
图8表示本公开一些实施例中网络设备侧的双连接切换方法流程示意图；
图9表示本公开一些实施例中网络设备的模块结构示意图；
图10表示本公开一些实施例中的网络设备框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备 固有的其它步骤或单元。说明书以及权利要求中“和/或”表示所连接对象的至少其中之一。
为了满足0ms的移动性过程的中断延时，需要终端在移动过程中同时在源节点和目标节点有连接，从而保证数据的收发，这就引入了双连接(Dual Connectivity，DC)切换(Handover，HO)，在DC HO过程中，本质上是建立起DC连接，再将DC连接转换为单连接(Single Connectivity，SC)。
DC架构包括主小区组(Master Cell Group，MCG)和辅小区组(Secondary Cell Group，SCG)，其中，MCG对应于网络设备侧的主节点(Master Node，MN)，SCG对应于网络设备侧的辅节点(Secondary Node，SN)。MCG包括主小区(Primary Cell，PCell)和辅小区(Secondary Cell，SCell)，SCG包括主辅小区(Primary Secondary Cell，PSCell)和辅小区SCell。其中，主小区PCell和主辅小区PSCell可以统称为SpCell。
进一步地，DC架构支持了分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)复制功能，DC架构还支持不同类型的承载类型(bearer Type)，包括MCG承载(MCG bearer)、SCG承载(SCG bearer)、分离承载(Split bearer)和复制承载(Duplicate bearer)。其中，如图1所示，MCG承载对应有PDCP、无线链路控制(Radio Link Control，RLC)、媒体接入控制(Medium Access Control，MAC)实体。SCG承载对应有PDCP、RLC、MAC实体。如图2所示，分离承载对应的PDCP实体在一个小区组，对应的两个RLC和两个MAC实体在不同的小区组。如图3所示，复制承载对应的PDCP实体、两个RLC和两个MAC实体在一个小区组。
本公开的一些实施例提供了一种双连接切换方法，应用于终端侧，如图4所示，该方法包括以下步骤：
步骤41：接收源节点发送的切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息。
其中，源节点(Source)可以是切换过程中的：源基站、DC中的源SN、DC中的源MN。相应地，源节点为源基站时，目标节点(Target)可以是：目标基站。源节点为DC中的源SN或MN时，目标节点可以是DC中的目标SN。其中，值得指出的是，HO切换流程可以由源SN或源MN触发，即切 换命令可以由源SN发送，也可以由源MN发送，但信令流程相同。其中，目标节点的单连接为目标小区(Target Cell)的单连接。
其中，切换命令携带于无线资源控制(Radio Resource Control，RRC)重配置消息中，RRC重配置消息具有第一业务标识(transaction ID)。该第一业务标识为RRC重配置消息的ID。
进一步地，切换命令中的DC配置信息和/或SC配置信息具有第二业务标识，第二业务标识不同于第一业务标识。也就是说，DC配置信息和SC配置信息可以有各自第二业务标识，也可以共用一个第二业务标识。该第二业务标识与RRC重配置消息的第一业务标识不同。
步骤42：当支持DC配置信息时，根据DC配置信息，建立与源节点和目标节点之间的双连接。
由于切换命令中携带有DC配置信息，终端在接收到切换命令后，可接受该DC配置信息并应用。在这个过程中，源节点作为DC中的MN，再根据DC配置信息添加目标节点为SN，当完成DC配置后，增加了终端与目标节点之间的连接，从而建立与源节点和目标节点之间的双连接。在双连接保持过程中，终端可同时在源节点和目标节点之间的连接中收发数据，保证数据传输的不间断。
步骤43：根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接。
由于切换命令中还携带有SC配置信息，终端在建立双连接后，将目标节点转换为DC中的MN角色，断开双连接中与源节点之间的连接，仅保持应用SC配置信息的与目标节点之间的单连接。这样，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，仅保持与目标节点之间的单连接，从而实现由源节点切换为目标节点的过程，在该过程中，终端始终与网络侧保持着连接，不会发生数据传输中断，可达到0ms传输延时的要求。
在本公开的一些实施例中，步骤41之后还包括：当不支持DC配置信息时，向源节点发送拒绝DC配置信息的拒绝消息，以使源节点根据拒绝消息执行单连接切换流程。终端在接收到切换命令后，由于自身终端能力或其他 原因可能不支持DC配置信息，这时终端向源节点发送拒绝DC配置信息的拒绝消息。源节点收到拒绝消息后可执行单连接切换流程，即传统切换流程。在单连接切换过程中，终端断开与源节点的连接，并建立与目标节点之间的连接，在该过程中可能存在短时间的数据传输时延。
步骤41之后，还包括：根据切换命令，向源节点发送第一确认信息；其中，确认信息用于确认以下中的至少一项：
是否接收到切换命令，
DC配置信息是否合法，
SC配置信息是否合法，
双连接是否建立，以及
SC配置信息是否应用。
其中，第一确认信息可以仅确认以上信息中的一种，例如终端在接收到切换命令时，向源节点反馈肯定应答(ACKnowledgement，ACK)，在未接收到切换命令时，向源节点反馈否定应答(Negative-ACKnowledgment，NACK)。又或者，终端在检测到DC配置信息/SC配置信息合法，即终端的能力支持该DC配置信息/SC配置信息中的各种配置参数，终端向源节点反馈ACK，在检测到DC配置/SC配置信息不合法时，即终端的能力不支持该DC配置信息/SC配置信息中的至少一项配置参数时，向源节点反馈NACK。又或者，终端在成功建立与源节点和目标节点之间的双连接时，向源节点反馈ACK；在双连接建立失败时，向源节点反馈NACK。又或者，终端成功应用SC配置信息时，即终端可建立与目标节点之间的单连接时，终端向源节点反馈ACK；在无法成功应用SC配置信息时，向源节点反馈NACK。
其中，第一确认信息可以联合确认以上信息中多种的任意组合，例如第一确认信息联合确认是否接收到切换命令和DC配置信息是否合法。以上信息中的其他组合也可通过第一确认信息联合确认，在此不再一一列举。
值得指出的是，第一确认信息可确认的信息不同，其反馈时机不同。例如第一确认信息仅确认是否接收到切换命令时，第一确认信息的发送时机在步骤41之后。第一确认信息用于联合确认是否接收到切换命令和双连接是否建立时，第一确认信息的发送时机在步骤42之后。
此外，除了上述第一确认信息联合确认的方式，以上信息中的多种可分别通过各自的确认信息进行确认。例如步骤41之后包括：根据切换命令，向源节点发送第一确认信息，第一确认信息用于确认是否接收到切换命令。在步骤42之后还包括：向源节点和/或目标节点发送已建立双连接的第二确认信息。第二确认信息用于确认是否成功建立双连接。
步骤43之后，还包括：向目标节点发送切换完成消息，其中，切换完成消息用于指示以下中的至少一项：已应用SC配置信息，切换完成。目标节点在收到切换完成消息时，告知源节点SC配置信息生效，原有的DC配置信息可以删除。
以上简单介绍了本公开的一些实施例的双连接切换方法，下面将结合附图对其做进一步说明。
如图5a所示，该双连接切换方法包括以下步骤：
步骤51：终端对与源节点之间的无线信道进行无线测量，并向源节点上报测量报告。
步骤52：当测量报告指示信道质量较差，需要进行信道切换时，源节点向目标节点发送切换请求。其中，该切换请求中携带有：源节点在单连接下的配置信息，以及在双连接下的配置信息。即源节点将本节点的配置和本节点在DC下可能希望的配置告知目标节点。
步骤53：源节点接收目标节点反馈的切换请求应答，其中，切换请求应答中携带有：DC配置信息，以及SC配置信息。目标节点根据源节点发送的切换请求(本节点的配置和本节点在DC下可能希望的配置)，生成两部分配置信息：即用于DC HO过程中的DC配置信息，以及接入目标小区后的SC配置信息。
步骤54：源节点向终端发送RRC重配置消息，该RRC重配置消息中携带有切换命令。
在步骤54之后，终端可向源节点发送第一确认信息，用于确认终端是否成功接收到切换命令、DC配置信息是否合法、SC配置信息是否合法、双连接是否成功建立、SC配置信息是否应用等中的一项或多项。
在步骤54以及之前，终端始终与源节点之间保持连接，这时终端和源节 点之间可进行数据传输。
步骤55：终端应用DC配置信息，以建立与源节点和目标节点之间的双连接。这时终端与源节点之间保持连接，终端和源节点之间可进行数据传输。终端与目标节点之间也保持连接，终端和目标节点之间也可以进行数据传输。
步骤56：终端应用SC配置信息，以断开与源节点之间的连接，仅保持与目标节点之间的连接。
可选地，终端可向源节点发送断开连接的指示信息；源节点可向目标节点发送断开连接的指示信息。
或者，
终端可向目标节点发送断开源节点连接的指示信息，目标节点可向源节点发送断开连接的指示信息。
值得说明的是，在步骤54之后，即终端接收到RRC重配置消息后，终端可立即应用DC配置信息，并将SC配置信息存储。例如，目标节点的SC配置信息可以使用容器(container)的形式打包在消息中(或者显式信元的方式，信元主要包括SC的物理层、层二、层三配置等)。等到终端与源节点和目标节点的双连接建立完成后，再应用SC配置信息，断开与源节点之间的连接，仅保持与目标节点之间的连接。如图5b所示，终端在t1时刻成功接收并解调RRC重配置消息，立即应用DC配置信息以建立双连接，并将SC配置信息存储。并在双连接建立完成后的t2时刻应用SC配置，断开与源节点的连接，完成切换到目标节点的过程。
步骤57：终端向目标节点发送切换完成消息。
本公开的一些实施例的双连接切换方法中，终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
以上实施例介绍了不同场景下的双连接切换方法，下面将结合附图对与其对应的终端做进一步介绍。
如图6所示，本公开的一些实施例的终端600，能实现上述实施例中接 收源节点发送的切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息；当支持DC配置信息时，根据DC配置信息，建立与源节点和目标节点之间的双连接；根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接方法的细节，并达到相同的效果，该终端600具体包括以下功能模块：
第一接收模块610，用于接收源节点发送的切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息；
第一建立模块620，用于根据DC配置信息，建立与源节点和目标节点之间的双连接；
切换模块630，用于根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接。
其中，终端600还包括：
第一发送模块，用于当不支持DC配置信息时，向源节点发送拒绝DC配置信息的拒绝消息，以使源节点根据拒绝消息执行单连接切换流程。
其中，终端600还包括：
第二发送模块，用于根据切换命令，向源节点发送第一确认信息；其中，第一确认信息用于确认以下中的至少一项：
是否接收到切换命令，
DC配置信息是否合法，
SC配置信息是否合法，
双连接是否建立，以及
SC配置信息是否应用。
其中，终端还包括：
第三发送模块，用于向源节点和/或目标节点发送已建立双连接的第二确认信息。
其中，终端600还包括：
第四发送模块，用于向目标节点发送切换完成消息，其中，切换完成消息用于指示以下中的至少一项：
已应用SC配置信息，
切换完成。
其中，切换命令携带于无线资源控制RRC重配置消息中，RRC重配置消息具有第一业务标识。
其中，DC配置信息和/或SC配置信息具有第二业务标识，第二业务标识不同于第一业务标识。
值得指出的是，本公开的一些实施例的终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
为了更好的实现上述目的，进一步地，图7为实现本公开各个实施例的一种终端的硬件结构示意图，该终端70包括但不限于：射频单元71、网络模块72、音频输出单元73、输入单元74、传感器75、显示单元76、用户输入单元77、接口单元73、存储器79、处理器710、以及电源711等部件。本领域技术人员可以理解，图7中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本公开的一些实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、车载终端、可穿戴设备、以及计步器等。
其中，射频单元71，用于接收源节点发送的切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息；
处理器710，用于当支持DC配置信息时，根据DC配置信息，建立与源节点和目标节点之间的双连接；
根据SC配置信息，断开双连接中与源节点的连接，保持与目标节点的单连接；
本公开的一些实施例的终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保 证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
应理解的是，本公开的一些实施例中，射频单元71可用于收发信息或通话过程中，信号的接收和发送，具体的，将来自基站的下行数据接收后，给处理器710处理；另外，将上行的数据发送给基站。通常，射频单元71包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元71还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块72为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元73可以将射频单元71或网络模块72接收的或者在存储器79中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元73还可以提供与终端70执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元73包括扬声器、蜂鸣器以及受话器等。
输入单元74用于接收音频或视频信号。输入单元74可以包括图形处理器(Graphics Processing Unit，GPU)741和麦克风742，图形处理器741对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元76上。经图形处理器741处理后的图像帧可以存储在存储器79(或其它存储介质)中或者经由射频单元71或网络模块72进行发送。麦克风742可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以在电话通话模式的情况下转换为可经由射频单元71发送到移动通信基站的格式输出。
终端70还包括至少一种传感器75，比如光传感器、运动传感器以及其他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板761的亮度，接近传感器可在终端70移动到耳边时，关闭显示面板761和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器75还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀 螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元76用于显示由用户输入的信息或提供给用户的信息。显示单元76可包括显示面板761，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板761。
用户输入单元77可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元77包括触控面板771以及其他输入设备772。触控面板771，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板771上或在触控面板771附近的操作)。触控面板771可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器710，接收处理器710发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板771。除了触控面板771，用户输入单元77还可以包括其他输入设备772。具体地，其他输入设备772可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步的，触控面板771可覆盖在显示面板761上，当触控面板771检测到在其上或附近的触摸操作后，传送给处理器710以确定触摸事件的类型，随后处理器710根据触摸事件的类型在显示面板761上提供相应的视觉输出。虽然在图7中，触控面板771与显示面板761是作为两个独立的部件来实现终端的输入和输出功能，但是在某些实施例中，可以将触控面板771与显示面板761集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元73为外部装置与终端70连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元73可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端 70内的一个或多个元件或者可以用于在终端70和外部装置之间传输数据。
存储器79可用于存储软件程序以及各种数据。存储器79可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器79可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器710是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器79内的软件程序和/或模块，以及调用存储在存储器79内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器710可包括一个或多个处理单元；可选的，处理器710可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器710中。
终端70还可以包括给各个部件供电的电源711(比如电池)，可选的，电源711可以通过电源管理系统与处理器710逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端70包括一些未示出的功能模块，在此不再赘述。
可选的，本公开的一些实施例还提供一种终端，包括处理器710，存储器79，存储在存储器79上并可在所述处理器710上运行的计算机程序，该计算机程序被处理器710执行时实现上述双连接切换方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，终端可以是无线终端也可以是有线终端，无线终端可以是指向用户提供语音和/或其他业务数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service， PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device or User Equipment)，在此不作限定。
本公开的一些实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述双连接切换方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
以上实施例从终端侧介绍了本公开的双连接切换方法，下面本实施例将结合附图对网络设备侧的双连接切换方法做进一步介绍。
如图8所示，本公开的一些实施例的双连接切换方法，应用于网络设备侧，该网络设备为源节点，该方法包括以下步骤：
步骤81：向终端发送切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息。
其中，源节点为源基站时，目标节点可以是：目标基站。源节点为DC中的源SN或MN时，目标节点可以是DC中的目标SN。其中，切换命令携带于无线资源控制RRC重配置消息中，RRC重配置消息具有第一业务标识(transaction ID)。该第一业务标识为RRC重配置消息的ID。进一步地，切换命令中的DC配置信息和/或SC配置信息具有第二业务标识，第二业务标识不同于第一业务标识。也就是说，DC配置信息和SC配置信息可以有各自第二业务标识，也可以共用一个第二业务标识。该第二业务标识与RRC重配置消息的第一业务标识不同。
步骤81之前，还包括：向目标节点发送切换请求，接收目标节点反馈的切换请求应答。其中，切换请求中携带有：源节点在单连接下的配置信息，以及在双连接下的配置信息；切换请求应答中携带有：DC配置信息，以及 SC配置信息。目标节点根据源节点发送的切换请求(本节点的配置和本节点在DC下可能希望的配置)，生成两部分配置信息：即用于DC HO过程中的DC配置信息，以及接入目标小区后的SC配置信息。
步骤81之后，还包括：接收终端发送的拒绝消息，根据拒绝消息，执行单连接切换流程。其中，拒绝消息用于指示终端拒绝DC配置信息。终端在接收到切换命令后，由于自身终端能力或其他原因可能不支持DC配置信息，这时终端向源节点发送拒绝DC配置信息的拒绝消息。源节点收到拒绝消息后可执行单连接切换流程，即传统切换流程。
步骤81之后，还包括：接收终端发送的第一确认信息；其中，第一确认信息用于确认以下中的至少一项：
是否接收到切换命令，
DC配置信息是否合法，
SC配置信息是否合法，
双连接是否建立，以及
SC配置信息是否应用。
其中，第一确认信息可以仅确认以上信息中的一种，第一确认信息还可以联合确认以上信息中多种的任意组合，值得指出的是，第一确认信息可确认的信息不同，其反馈时机不同。例如第一确认信息仅确认是否接收到切换命令时，第一确认信息的发送时机在步骤81之后。第一确认信息用于联合确认是否接收到切换命令和双连接是否建立时，第一确认信息的发送时机在终端建立与源节点和目标节点之间的双连接之后。
在接收终端发送的第一确认信息的步骤之后还包括：向目标节点发送第一切换确认消息(confirmation forwarded)；接收目标节点根据第一切换确认消息反馈的第二切换确认消息。
除了上述第一确认信息联合确认的方式，以上信息中的多种可分别通过各自的确认信息进行确认。步骤81之后还包括：接收终端发送的用于指示接收到切换命令的第一确认信息，并在终端建立了与源节点和目标节点之间的双连接后，接收终端或目标节点发送的用于指示已建立双连接的第二确认信息。
本公开的一些实施例的双连接切换方法中，源节点将携带有DC配置信息和SC配置信息的切换命令发送给终端，以使终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
以上实施例分别详细介绍了不同场景下的双连接切换方法，下面本实施例将结合附图对其对应的网络设备做进一步介绍。
如图9所示，本公开的一些实施例的网络设备900，能实现上述实施例中向终端发送切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息方法的细节，并达到相同的效果，该网络设备900具体包括以下功能模块：
第五发送模块910，用于向终端发送切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息。
其中，网络设备900还包括：
第六发送模块，用于向目标节点发送切换请求，其中，切换请求中携带有：源节点在单连接下的配置信息，以及在双连接下的配置信息；
第二接收模块，用于接收目标节点反馈的切换请求应答，其中，切换请求应答中携带有：DC配置信息，以及SC配置信息。
其中，网络设备900还包括：
第三接收模块，用于接收终端发送的拒绝消息，其中，拒绝消息用于指示终端拒绝DC配置信息；
处理模块，用于根据拒绝消息，执行单连接切换流程。
其中，网络设备900还包括：
第四接收模块，用于接收终端发送的第一确认信息；其中，第一确认信息用于确认以下中的至少一项：
是否接收到切换命令，
DC配置信息是否合法，
SC配置信息是否合法，
双连接是否建立，以及
SC配置信息是否应用。
其中，网络设备900还包括：
第七发送模块，用于向目标节点发送第一切换确认消息；
第五接收模块，用于接收目标节点根据第一切换确认消息反馈的第二切换确认消息。
其中，网络设备900还包括：
第六接收模块，用于接收终端或目标节点发送的用于指示已建立双连接的第二确认信息。
值得指出的是，本公开的一些实施例的源节点将携带有DC配置信息和SC配置信息的切换命令发送给终端，以使终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
需要说明的是，应理解以上网络设备和终端的各个模块的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且这些模块可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分模块通过处理元件调用软件的形式实现，部分模块通过硬件的形式实现。例如，确定模块可以为单独设立的处理元件，也可以集成在上述装置的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述装置的存储器中，由上述装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电 路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital signal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
为了更好的实现上述目的，本公开的实施例还提供了一种网络设备，该网络设备包括处理器、存储器以及存储于存储器上并可在处理器上运行的计算机程序，处理器执行计算机程序时实现如上所述的双连接切换方法中的步骤。发明实施例还提供了一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序，计算机程序被处理器执行时实现如上所述的双连接切换方法的步骤。
具体地，本公开的实施例还提供了一种网络设备。如图10所示，该网络设备1000包括：天线101、射频装置102、基带装置103。天线101与射频装置102连接。在上行方向上，射频装置102通过天线101接收信息，将接收的信息发送给基带装置103进行处理。在下行方向上，基带装置103对要发送的信息进行处理，并发送给射频装置102，射频装置102对收到的信息进行处理后经过天线101发送出去。
上述频带处理装置可以位于基带装置103中，以上实施例中网络设备执行的方法可以在基带装置103中实现，该基带装置103包括处理器104和存储器105。
基带装置103例如可以包括至少一个基带板，该基带板上设置有多个芯片，如图10所示，其中一个芯片例如为处理器104，与存储器105连接，以调用存储器105中的程序，执行以上方法实施例中所示的网络设备操作。
该基带装置103还可以包括网络接口106，用于与射频装置102交互信息，该接口例如为通用公共无线接口(common public radio interface，CPRI)。
这里的处理器可以是一个处理器，也可以是多个处理元件的统称，例如，该处理器可以是CPU，也可以是ASIC，或者是被配置成实施以上网络设备 所执行方法的一个或多个集成电路，例如：一个或多个微处理器DSP，或，一个或者多个现场可编程门阵列FPGA等。存储元件可以是一个存储器，也可以是多个存储元件的统称。
存储器105可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本申请描述的存储器105旨在包括但不限于这些和任意其它适合类型的存储器。
具体地，本公开的一些实施例的网络设备还包括：存储在存储器105上并可在处理器104上运行的计算机程序，处理器104调用存储器105中的计算机程序执行图8所示各模块执行的方法。
具体地，计算机程序被处理器104调用时可用于执行：向终端发送切换命令，其中，切换命令中携带有：源节点和目标节点的双连接DC配置信息，以及目标节点的单连接SC配置信息。其中，网络设备可以是全球移动通讯(Global System of Mobile communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者未来5G网络中的基站等，在此并不限定。
本公开的一些实施例中的源节点将携带有DC配置信息和SC配置信息的切换命令发送给终端，以使终端在切换过程中，先根据DC配置信息建立起源节点和目标节点的双连接，再根据SC配置信息断开双连接中源节点的连接，以切换为目标节点的单连接，这样可支持DC HO过程中的连接配置，保证DC HO过程正常进行，从而满足终端移动过程中的0ms终端延时要求。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本公开的 技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
此外，需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行，某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言，能够理解本公开的方法和装置的全部或者任何步骤或者部件，可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (29)

  1. 一种双连接切换方法，应用于终端侧，包括：
    接收源节点发送的切换命令，其中，所述切换命令中携带有：所述源节点和目标节点的双连接DC配置信息，以及所述目标节点的单连接SC配置信息；
    当支持所述DC配置信息时，根据所述DC配置信息，建立与所述源节点和所述目标节点之间的双连接；
    根据所述SC配置信息，断开所述双连接中与所述源节点的连接，保持与所述目标节点的单连接。
  2. 根据权利要求1所述的双连接切换方法，其中，接收源节点发送的切换命令的步骤之后，还包括：
    当不支持所述DC配置信息时，向所述源节点发送拒绝所述DC配置信息的拒绝消息，以使所述源节点根据所述拒绝消息执行单连接切换流程。
  3. 根据权利要求1所述的双连接切换方法，其中，接收源节点发送的切换命令的步骤之后，还包括：
    根据所述切换命令，向所述源节点发送第一确认信息；其中，所述第一确认信息用于确认以下中的至少一项：
    是否接收到所述切换命令，
    所述DC配置信息是否合法，
    所述SC配置信息是否合法，
    所述双连接是否建立，以及
    所述SC配置信息是否应用。
  4. 根据权利要求1所述的双连接切换方法，其中，根据所述DC配置信息，建立与所述源节点和所述目标节点之间的双连接的步骤之后，还包括：
    向所述源节点和/或目标节点发送已建立所述双连接的第二确认信息。
  5. 根据权利要求1所述的双连接切换方法，其中，根据所述SC配置信息，断开所述双连接中与所述源节点的连接，保持与所述目标节点的单连接的步骤之后，还包括：
    向所述目标节点发送切换完成消息，其中，所述切换完成消息用于指示以下中的至少一项：
    已应用所述SC配置信息，
    切换完成。
  6. 根据权利要求1所述的双连接切换方法，其中，所述切换命令携带于无线资源控制RRC重配置消息中，所述RRC重配置消息具有第一业务标识。
  7. 根据权利要求6所述的双连接切换方法，其中，所述DC配置信息和/或所述SC配置信息具有第二业务标识，所述第二业务标识不同于所述第一业务标识。
  8. 一种终端，包括：
    第一接收模块，用于接收源节点发送的切换命令，其中，所述切换命令中携带有：所述源节点和目标节点的双连接DC配置信息，以及所述目标节点的单连接SC配置信息；
    第一建立模块，用于当支持所述DC配置信息时，根据所述DC配置信息，建立与所述源节点和所述目标节点之间的双连接；
    切换模块，用于根据所述SC配置信息，断开所述双连接中与所述源节点的连接，保持与所述目标节点的单连接。
  9. 根据权利要求8所述的终端，还包括：
    第一发送模块，用于当不支持所述DC配置信息时，向所述源节点发送拒绝所述DC配置信息的拒绝消息，以使所述源节点根据所述拒绝消息执行单连接切换流程。
  10. 根据权利要求8所述的终端，还包括：
    第二发送模块，用于根据所述切换命令，向所述源节点发送第一确认信息；其中，所述第一确认信息用于确认以下中的至少一项：
    是否接收到所述切换命令，
    所述DC配置信息是否合法，
    所述SC配置信息是否合法，
    所述双连接是否建立，以及
    所述SC配置信息是否应用。
  11. 根据权利要求8所述的终端，还包括：
    第三发送模块，用于向所述源节点和/或目标节点发送已建立所述双连接的第二确认信息。
  12. 根据权利要求8所述的终端，还包括：
    第四发送模块，用于向所述目标节点发送切换完成消息，其中，所述切换完成消息用于指示以下中的至少一项：
    已应用所述SC配置信息，
    切换完成。
  13. 根据权利要求8所述的终端，其中，所述切换命令携带于无线资源控制RRC重配置消息中，所述RRC重配置消息具有第一业务标识。
  14. 根据权利要求13所述的终端，其中，所述DC配置信息和/或所述SC配置信息具有第二业务标识，所述第二业务标识不同于所述第一业务标识。
  15. 一种终端，所述终端包括处理器、存储器以及存储于所述存储器上并在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至7中任一项所述的双连接切换方法的步骤。
  16. 一种双连接切换方法，应用于网络设备侧，所述网络设备为源节点，包括：
    向终端发送切换命令，其中，所述切换命令中携带有：所述源节点和目标节点的双连接DC配置信息，以及所述目标节点的单连接SC配置信息。
  17. 根据权利要求16所述的双连接切换方法，其中，向终端发送切换命令的步骤之前，还包括：
    向目标节点发送切换请求，其中，所述切换请求中携带有：所述源节点在单连接下的配置信息，以及在双连接下的配置信息；
    接收所述目标节点反馈的切换请求应答，其中，所述切换请求应答中携带有：所述DC配置信息，以及所述SC配置信息。
  18. 根据权利要求16所述的双连接切换方法，其中，向终端发送切换命令的步骤之后，还包括：
    接收所述终端发送的拒绝消息，其中，所述拒绝消息用于指示所述终端拒绝所述DC配置信息；
    根据所述拒绝消息，执行单连接切换流程。
  19. 根据权利要求16所述的双连接切换方法，其中，向终端发送切换命令的步骤之后，还包括：
    接收所述终端发送的第一确认信息；其中，所述第一确认信息用于确认以下中的至少一项：
    是否接收到所述切换命令，
    所述DC配置信息是否合法，
    所述SC配置信息是否合法，
    所述双连接是否建立，以及
    所述SC配置信息是否应用。
  20. 根据权利要求19所述的双连接切换方法，其中，接收所述终端发送的第一确认信息的步骤之后，还包括：
    向目标节点发送第一切换确认消息；
    接收所述目标节点根据所述第一切换确认消息反馈的第二切换确认消息。
  21. 根据权利要求16所述的双连接切换方法，其中，向终端发送切换命令的步骤之后，还包括：
    接收所述终端或目标节点发送的用于指示已建立所述双连接的第二确认信息。
  22. 一种网络设备，所述网络设备为源节点，包括：
    第五发送模块，用于向终端发送切换命令，其中，所述切换命令中携带有：所述源节点和目标节点的双连接DC配置信息，以及所述目标节点的单连接SC配置信息。
  23. 根据权利要求22所述的网络设备，还包括：
    第六发送模块，用于向目标节点发送切换请求，其中，所述切换请求中携带有：所述源节点在单连接下的配置信息，以及在双连接下的配置信息；
    第二接收模块，用于接收所述目标节点反馈的切换请求应答，其中，所述切换请求应答中携带有：所述DC配置信息，以及所述SC配置信息。
  24. 根据权利要求22所述的网络设备，还包括：
    第三接收模块，用于接收所述终端发送的拒绝消息，其中，所述拒绝消 息用于指示所述终端拒绝所述DC配置信息；
    处理模块，用于根据所述拒绝消息，执行单连接切换流程。
  25. 根据权利要求22所述的网络设备，还包括：
    第四接收模块，用于接收所述终端发送的第一确认信息；其中，所述第一确认信息用于确认以下中的至少一项：
    是否接收到所述切换命令，
    所述DC配置信息是否合法，
    所述SC配置信息是否合法，
    所述双连接是否建立，以及
    所述SC配置信息是否应用。
  26. 根据权利要求25所述的网络设备，还包括：
    第七发送模块，用于向目标节点发送第一切换确认消息；
    第五接收模块，用于接收所述目标节点根据所述第一切换确认消息反馈的第二切换确认消息。
  27. 根据权利要求22所述的网络设备，还包括：
    第六接收模块，用于接收所述终端或目标节点发送的用于指示已建立所述双连接的第二确认信息。
  28. 一种网络设备，所述网络设备包括处理器、存储器以及存储于所述存储器上并在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如权利要求16至21任一项所述的双连接切换方法的步骤。
  29. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至8、16至21中任一项所述的双连接切换方法的步骤。
PCT/CN2019/106672 2018-09-27 2019-09-19 双连接切换方法、终端及网络设备 WO2020063442A1 (zh)

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