WO2017139976A1 - Procédé et appareil pour changement de cellule - Google Patents

Procédé et appareil pour changement de cellule Download PDF

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Publication number
WO2017139976A1
WO2017139976A1 PCT/CN2016/074148 CN2016074148W WO2017139976A1 WO 2017139976 A1 WO2017139976 A1 WO 2017139976A1 CN 2016074148 W CN2016074148 W CN 2016074148W WO 2017139976 A1 WO2017139976 A1 WO 2017139976A1
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WO
WIPO (PCT)
Prior art keywords
base station
terminal device
configuration parameter
information units
information
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PCT/CN2016/074148
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English (en)
Chinese (zh)
Inventor
柴丽
张戬
权威
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/074148 priority Critical patent/WO2017139976A1/fr
Publication of WO2017139976A1 publication Critical patent/WO2017139976A1/fr

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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

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a cell change method and apparatus.
  • the cell change includes, when the terminal device accesses a traditional scenario of a serving cell, the terminal device performs cell handover, and further includes a scenario in which the terminal device accesses multiple serving cells at the same time (for example, the terminal device accesses multiple In the mobile communication network of the Heterogeneous Network (HetNet), the change of the primary base station and the addition, deletion or modification of the secondary base station.
  • the addition, deletion, or modification of the secondary base station includes: adding, deleting, or modifying the secondary cell, adding, deleting, or modifying the secondary cell group.
  • the terminal device needs to establish a secondary base station corresponding to the target base station, the target primary base station, the newly added secondary base station, the newly added secondary cell, and the newly added secondary cell according to the at least one configuration parameter.
  • At least one radio bearer between the sub-base station corresponding to the group, the secondary base station to be modified, the secondary base station corresponding to the secondary cell to be modified, or the secondary base station corresponding to the secondary cell group to be modified.
  • Each radio bearer corresponds to one configuration parameter.
  • the terminal device needs to reconfigure at least one configuration parameter corresponding to the at least one radio bearer.
  • the terminal device experiences a disconnection process, which leads to interruption of the service of the terminal device and reduces the user experience.
  • the embodiment of the present invention provides a method and a device for changing a cell, which is used to solve the problem that the user equipment is disconnected each time the terminal device is changed in the prior art, and the service of the terminal device is interrupted.
  • an embodiment of the present application provides a cell change method, where the method includes:
  • the first base station After the second base station that is to establish a radio bearer with the terminal device in the cell change process receives the first cell change indication message sent by the network device for the terminal device, the first base station first acquires at least between the terminal device and the first base station. At least one first configuration parameter used by the first radio bearer, the first base station is an existing base station of the terminal device, where each first radio bearer corresponds to a first configuration parameter, and the first configuration parameter Include n first information units, where n is a natural number greater than or equal to 1;
  • the second base station generates, according to the acquired at least one first configuration parameter, at least one second configuration parameter, where the second configuration parameter includes n second information units, where the at least one second configuration
  • the parameter is consistent with the at least one first configuration parameter, that is, the value of each second information unit in each second configuration parameter meets any one of the following conditions: and the corresponding first configuration parameter
  • the value of the corresponding first information unit is the same, or the maintenance is continued based on the value of the corresponding first information unit in the corresponding first configuration parameter.
  • Each second configuration parameter corresponds to a second radio bearer between the terminal device and the second base station.
  • the terminal device since the at least one second configuration parameter generated by the second base station is consistent with the at least one first configuration parameter, the terminal device does not need to be at least one to be established in the cell change process.
  • the configuration parameters of the second radio bearer are reconfigured, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved.
  • the m first information units of the n first information units and the m second information units of the n second information units have the same value
  • the n second The values of the nm second information units in the information unit are maintained based on the values of the nm first information units in the n first information units, where m is a natural number greater than or equal to 1 and less than n ;or
  • the n first information units are the same as the n second information units; or
  • the values of the n second information units are maintained based on the values of the n first information units. In this way, it can be ensured that the at least one second configuration parameter generated by the second base station is consistent with the at least one first configuration parameter.
  • the network device is a first base station or a network control node
  • the first base station is a source base station of the terminal device, and the first cell change indication message is a handover message;
  • the first base station is a source primary base station of the terminal device, and the first cell change indication message is a handover message;
  • the first base station is The primary base station of the terminal device, or the existing secondary base station, the first cell change indication message is a new message added by the secondary base station; or
  • the first base station is The primary base station of the terminal device or the existing secondary base station, the first cell change indication message is a secondary base station modification message.
  • any one of the secondary base station is added or modified (including: adding or modifying a secondary cell, adding or modifying a secondary cell group), and the second base station generates the
  • the at least one second configuration parameter is consistent with the at least one first configuration parameter, and therefore, in any one of the cell change processes, the terminal device does not need each configuration corresponding to the at least one second radio bearer to be established.
  • the parameter is reconfigured, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved.
  • the n first information units include at least one type of information unit: an information unit of a packet data convergence protocol PDCP layer configuration parameter, an information unit of a radio link control RLC layer configuration parameter, and Media access control information element of the MAC layer configuration parameter;
  • the n second information units also include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the configuration parameters of the PDCP layer of the at least one second configuration parameter are consistent with the configuration parameters of the PDCP layer in the at least one first configuration parameter, so that the terminal device does not need various configuration parameters for the PDCP layer.
  • Reconfigure to avoid PDCP reconstruction, in addition The key update is not triggered, and the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved; or, due to the RLC layer configuration parameter in the at least one second configuration parameter, The RLC layer configuration parameter in the at least one first configuration parameter is consistent, or the MAC layer configuration parameter in the at least one second configuration parameter is consistent with the MAC layer configuration parameter in the at least one first configuration parameter.
  • the RLC does not need to be re-established, or the content in the MAC layer cache is reserved, the information of the logical channel is saved, and the related variables and timer information are maintained, and are not cleared.
  • the process of stopping and resetting ensures that the terminal device does not cause user plane disconnection during the entire change process, maintains the smoothness of the service of the terminal device, and improves service performance.
  • the x first information units of the n first information units included in each first configuration parameter are variables, counters, and/or timers;
  • the x second information units of the n second information units included in the second configuration parameter generated based on each first configuration parameter are variables, counters, and/or timers;
  • the value of the x first information units in the n first information units included in each first configuration parameter is a first value
  • the value of the x second information units in the n second information units included in the second configuration parameter generated based on each first configuration parameter is a second value, and the second value is based on the first value Continued maintenance, where x is a natural number greater than or equal to 1 and less than n.
  • the first value is sent by the first base station or the terminal device to the second base station.
  • the second base station is a target base station, and the at least one first configuration parameter is used between the terminal device and the second base station. At least one configuration of the second radio bearer; or
  • the second base station is a new secondary base station and a new one when the terminal device is newly added, the secondary cell is newly added, the secondary cell group is newly added, the secondary base station is modified, the secondary cell is modified, or the secondary cell group is modified.
  • At least one first configuration parameter configured for at least one second radio bearer between the terminal device and the second base station; or
  • the second base station is a target primary base station; and each time the secondary device is added to the secondary base station, the secondary cell is added, the secondary cell group is added, and the secondary base station is modified,
  • the second base station is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, a secondary base station corresponding to the newly added secondary cell group, and a secondary base station to be modified, to be modified.
  • the bearer configures the at least one first configuration parameter.
  • any one of the secondary base station is added or modified (including: adding or modifying a secondary cell, adding or modifying a secondary cell group), and the second base station generates the
  • the at least one second configuration parameter is consistent with the at least one first configuration parameter, and therefore, in any one of the cell change processes, the terminal device does not need each configuration corresponding to the at least one second radio bearer to be established.
  • the parameter is reconfigured, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved.
  • the at least one second configuration parameter is generated at the second base station After the second base station determines whether the connection between the second base station and the terminal device is established, if not established, the second base station suspends the at least one second configuration parameter; and continues It is determined that, when it is determined that the connection between the second base station and the terminal device is established, the second base station starts the suspended at least one second configuration parameter. In this way, it is possible to avoid wasting resources of the second base station and improve resource utilization of the second base station.
  • the second base station may determine, by using a plurality of manners, the at least one first configuration parameter used by the at least one first radio bearer, including:
  • the second base station receives the at least one first configuration parameter used by the at least one first radio bearer sent by the first base station.
  • the second base station determines a first hybrid automatic repeat request (HARQ) that is maintained by the first base station for the terminal device.
  • HARQ hybrid automatic repeat request
  • Information the first HARQ information includes p first HARQ information units, where p is a natural number greater than or equal to 1;
  • the second base station generates second HARQ information for the second base station based on the determined first HARQ information, where the second HARQ information includes p second HARQ information units, and the generated second
  • the HARQ information is consistent with the first HARQ information, that is, the value of one second HARQ information element in the p second HARQ information units and one first HARQ information in the p first HARQ information units
  • the value of the unit is the same, or is maintained based on the value of one of the p first HARQ information units.
  • the data may be transmitted between the first base station and the terminal device before the cell is changed. Therefore, when the cell is changed, the first base station maintains a timer in the uplink and downlink data transmission direction HARQ process. And retransmission information, as well as response messages for upstream and downstream data transmission directions In this way, the second base station inherits the HARQ information maintained by the first base station during the cell change, and can ensure the smoothness and security of the service data transmission of the terminal device.
  • the second base station determines the first HARQ information, including:
  • the second base station receives the first HARQ information sent by the first base station.
  • the second base station determines whether a connection between the second base station and the terminal device is established, If not established, the judgment is continued until the second HARQ information is started when the determination is established. In this way, waste of the second base station resources is avoided.
  • an embodiment of the present application provides a cell change method, where the method includes:
  • the terminal device in the cell change process receives the second cell change indication message sent by the network device, and determines, according to the second cell change indication message, the second base station that is to be changed by the terminal device cell to establish a radio bearer with the terminal device. And determining at least one second configuration parameter used by the at least one second radio bearer between the terminal device and the second base station, wherein each second radio bearer corresponds to the at least one second configuration parameter a second configuration parameter, the network device is a first base station or a network control node;
  • the terminal device establishes a corresponding second radio bearer according to each determined second configuration parameter of the at least one second configuration parameter.
  • the terminal device can ensure that the second radio bearer is established with the second base station, and the cell change is implemented.
  • the second base station is a target base station configured for the terminal device
  • the first base station is a source base station of the terminal device
  • the second cell change indication message is a handover message.
  • the first base station is a source primary base station of the terminal device
  • the second cell change indication message is a handover message
  • the first base station is Said
  • the primary base station of the terminal device, or the existing secondary base station, the second cell change indication message is a new message added by the secondary base station; or
  • the first base station is The primary base station of the terminal device, or the existing secondary base station
  • the second cell change indication message is a secondary base station modification message.
  • any one of the addition or modification of the secondary base station (including: adding or modifying the secondary cell, adding or modifying the secondary cell group) can ensure the second The base station establishes a second radio bearer to implement cell change.
  • the at least one first radio bearer between the terminal device and the first base station uses at least one first configuration parameter, wherein each first radio bearer corresponds to the at least one first configuration a first configuration parameter of the parameter, the first configuration parameter includes n first information units, where n is a natural number greater than or equal to 1;
  • each of the at least one second configuration parameter includes n second information units, and the at least one second configuration parameter is consistent with the at least one first configuration parameter. That is, the value of one of the n second information units is the same as the value of one of the n first information units, or is based on the n The value of a first information element in the first information unit continues to be maintained.
  • the terminal device since the at least one second configuration parameter determined by the terminal device is consistent with the at least one first configuration parameter, the terminal device does not need to establish at least one second wireless during the cell change process.
  • the configuration parameters of the corresponding configuration are reconfigured, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved.
  • the m first information units of the n first information units and the m second information units of the n second information units have the same value
  • the n second The values of the nm second information units in the information unit are maintained based on the values of the nm first information units in the n first information units, where m is a natural number greater than or equal to 1 and less than n Or
  • the n first information units are the same as the n second information units; or
  • the values of the n second information units are maintained based on the values of the n first information units. In this way, it can be ensured that the at least one second configuration parameter determined by the terminal device is consistent with the at least one first configuration parameter.
  • the n first information units include at least one type of information unit: an information unit of a packet data convergence protocol PDCP layer configuration parameter, an information unit of a radio link control RLC layer configuration parameter, and Media access control information element of the MAC layer configuration parameter;
  • the n second information units also include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the configuration parameters of the PDCP layer of the at least one second configuration parameter are consistent with the configuration parameters of the PDCP layer in the at least one first configuration parameter, so that the terminal device does not need various configuration parameters for the PDCP layer. Reconfiguring, avoiding PDCP re-establishment, and not triggering key update, thereby not causing user plane disconnection, maintaining the fluency of the service of the terminal device, and improving service performance; or, due to the at least one
  • the RLC layer configuration parameter in the second configuration parameter is consistent with the RLC layer configuration parameter in the at least one first configuration parameter, or the MAC layer configuration parameter in the at least one second configuration parameter is related to the at least one first
  • the MAC layer configuration parameters in the configuration parameters are consistent.
  • the RLC does not need to be re-established during the cell change process, or the content in the MAC layer cache is reserved, and the information of the logical channel, related variables and timers are saved. The information continues to be maintained, and no zeroing, stop and reset processing is performed, which also ensures that the terminal device is in the entire change process.
  • the user plane is not disconnected, the service of the terminal device is kept fluent, and the service performance is improved.
  • the x first information units of the n first information units included in each first configuration parameter are variables, counters, and/or timers;
  • the x second information units of the n second information units included in the second configuration parameter generated based on each first configuration parameter are variables, counters, and/or timers;
  • the value is the first value
  • the value of the x second information units in the n second information units included in the second configuration parameter generated based on each first configuration parameter is a second value, and the second value is based on the first value Continued maintenance, where x is a natural number greater than or equal to 1 and less than n.
  • the first value is sent by the first base station or the terminal device to the second base station.
  • the second base station is a target base station, and the at least one first configuration parameter is used between the terminal device and the second base station. At least one configuration of the second radio bearer; or
  • the second base station is a new secondary base station and a new one when the terminal device is newly added, the secondary cell is newly added, the secondary cell group is newly added, the secondary base station is modified, the secondary cell is modified, or the secondary cell group is modified.
  • At least one first configuration parameter configured for at least one second radio bearer between the terminal device and the second base station; or
  • the second base station is a target primary base station; and each time the secondary device is added to the secondary base station, the secondary cell is newly added, the secondary cell group is added, and the secondary base station is modified,
  • the second base station is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, a secondary base station corresponding to the newly added secondary cell group, and a secondary base station to be modified, to be modified.
  • the bearer configures the at least one first configuration parameter.
  • the cell device changes to the cell handover, the change of the primary base station, and the addition or modification of the secondary base station (including: adding, modifying, and adding or modifying the secondary cell group), the terminal device determining the The at least one second configuration parameter is consistent with the at least one first configuration parameter, and therefore, in any one of the cell change processes, the terminal device does not need each configuration parameter corresponding to the at least one second radio bearer to be established.
  • the configuration is reconfigured, so that the user plane is not disconnected, the traffic of the terminal device is maintained, and the service performance is improved.
  • the terminal device determines between the second base station and the terminal device Whether the connection is established, if not established, suspending the at least one second configuration parameter; and continuing to determine until the connection between the second base station and the terminal device is established, the terminal device is re-established The at least one second configuration parameter that is suspended is initiated. In this way, it is possible to avoid wasting resources of the terminal device and improve resource utilization of the second base station.
  • the terminal device may determine, by using a plurality of manners, the at least one second configuration parameter used by the at least one second radio bearer, including:
  • the terminal device associates the stored at least one radio bearer with the at least one configuration parameter as the at least one second configuration parameter used by the at least one second radio bearer;
  • the terminal device receives the configuration parameter unchanged indication sent by the network device or the first base station, and according to the configuration parameter unchanged indication, the stored at least one radio bearer corresponds to Having one configuration parameter as the at least one second configuration parameter used by the at least one second radio bearer, the configuration parameter unchanged indication, configured to notify the terminal device according to at least one stored in the terminal device
  • the configuration parameter establishes the at least one second radio bearer.
  • the terminal device determines a third hybrid automatic repeat request HARQ information that is maintained by the terminal device for the first base station,
  • the third HARQ information includes p third HARQ information units, where p is a natural number greater than or equal to 1;
  • the terminal device generates, according to the determined third HARQ information, fourth HARQ information for the second base station, where the fourth HARQ information includes p fourth HARQ information units, and the generated fourth HARQ
  • the information is consistent with the third HARQ information, that is, the value of one of the p fourth HARQ information units and the value of one of the p third HARQ information units
  • the values are the same, or are maintained based on the value of one of the p third HARQ information units.
  • the data may be transmitted between the first base station and the terminal device before the cell is changed. Therefore, when the cell is changed, the terminal device maintains a timer in the HARQ process of the uplink and downlink data transmission directions.
  • the retransmission information, and the response message of the uplink and downlink data transmission directions, etc., the terminal device inherits the HARQ information maintained for the first base station when the cell is changed, and the terminal device service can be guaranteed.
  • the terminal device determines whether a connection between the second base station and the terminal device is established, and if not, The fourth HARQ information is suspended; and the judgment is continued until the fourth HARQ information that is suspended is restarted when the determination is established. In this way, waste of the second base station resources is avoided.
  • the embodiment of the present application further provides a cell change method, where the method includes:
  • the first base station that is already in the terminal device sends a cell change indication message to the terminal device, and continues to perform data transmission with the terminal device, where the first base station performs data transmission with the terminal device.
  • the method includes: the first base station sending data to the terminal device, and/or receiving data sent by the terminal device.
  • the first base station receives the cell change complete message sent by the terminal device or the second base station, stopping data transmission with the terminal device, where the cell change completion message is the terminal device and the The connection establishment success message or the released terminal device context message of the second base station.
  • the first base station After the first base station sends the cell change indication message to the terminal device, and after receiving the cell change completion message, the data transmission is continued with the terminal device until the terminal device and the second device are used.
  • the connection establishment of the base station is completed, so that the data transmission of the terminal device is not interrupted, the service data transmission is not delayed, and the user experience is improved.
  • the method before the first base station stops data transmission with the terminal device, the method further includes:
  • the first base station forwards data to be sent to the terminal device to the second base station.
  • the embodiment of the present application further provides a cell change method, where the method includes:
  • the terminal device After receiving the cell change indication message sent by the first base station, the terminal device continues to perform data transmission with the first base station without interrupting the connection with the first base station, where the terminal device and the first base station Performing data transmission includes: the terminal device transmitting data to the first base station, and/or receiving data sent by the first base station.
  • the terminal device establishes a connection with the second base station according to the cell change indication message.
  • the terminal device performs data transmission with the second base station.
  • the terminal device After receiving the cell change indication message, the terminal device continues to perform data transmission with the terminal device until the connection between the terminal device and the second base station is completed, so that the terminal device ensures that the connection between the terminal device and the second base station is completed.
  • the data transmission of the terminal device is not interrupted, and the service data transmission is not delayed, thereby improving the user experience.
  • the terminal device after the terminal device establishes a connection with the second base station, the terminal device stops data transmission with the first base station;
  • the terminal device After receiving the release indication message sent by the first base station or the second base station, the terminal device stops performing data transmission with the first base station, and the release indication message is used to notify the terminal device to be disconnected. Opening a connection with the first base station.
  • the embodiment of the present invention further provides a second base station, where the second base station has a function of implementing the behavior of the second base station in the method in the foregoing first aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the second base station includes: a receiving unit and a processing unit, where
  • a receiving unit configured to receive a first cell change indication message sent by the network device for the terminal device
  • a processing unit configured to determine at least one first configuration parameter used by the at least one first radio bearer between the terminal device and the first base station, where each first radio bearer corresponds to the at least one first configuration parameter a first configuration parameter, the first configuration parameter includes n first information units, where n is a natural number greater than or equal to 1;
  • the second configuration parameter includes n second information units, and a value of one of the n second information units and the n first information units The value of one of the first information units is the same, or is maintained based on the value of one of the n first information units.
  • the embodiment of the present invention further provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the method in the foregoing second aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal device includes: a receiving unit and a processing unit, where
  • a receiving unit configured to receive a second cell change indication message sent by the network device
  • a processing unit configured to determine, according to the second cell change indication message, a second base station that is changed by the terminal device cell; and determine at least one second radio bearer used between the terminal device and the second base station At least one second configuration parameter, wherein each second radio bearer corresponds to one of the at least one second configuration parameter, the network device being a first base station or a network control node;
  • the embodiment of the present invention further provides a second base station, where the second base station has a second base station behavior that implements the method in the foregoing first aspect, and a function of the second base station in the fifth aspect.
  • the second base station includes: a receiver, a processor, a bus, a memory, and a transmitter, wherein the receiver, the processor, the memory, and the transmitter are connected to each other through a bus, and the processor executes an application stored in the memory to implement the foregoing Features.
  • the embodiment of the present invention further provides a terminal device, where the terminal device has the behavior of the terminal device that implements the method in the foregoing second aspect, and the function of the second base station in the sixth aspect.
  • the second base station includes: a receiver, a processor, a bus, a memory, and a transmitter, wherein the receiver, the processor, the memory, and the transmitter are connected to each other through a bus, and the processor executes an application stored in the memory to implement the foregoing Features.
  • At least one second configuration parameter generated by the second base station of the at least one second radio bearer to be established with the terminal device in the cell change process The terminal device is consistent with the at least one first configuration parameter used by the at least one first radio bearer of the existing first base station, that is, the value of each second information unit in each second configuration parameter is consistent
  • the value of the first information element corresponding to the first configuration parameter is the same, or the value is continued based on the value of the corresponding first information element in the corresponding first configuration parameter.
  • Each of the second configuration parameters corresponds to a second radio bearer
  • each of the first configuration parameters corresponds to a first radio bearer.
  • the terminal device does not need each configuration parameter corresponding to the at least one second radio bearer to be established in the cell change process.
  • the configuration is reconfigured, so that the user plane is not disconnected, the traffic of the terminal device is maintained, and the service performance is improved.
  • FIG. 1 is a schematic structural diagram of a mobile communication network according to an embodiment of the present invention
  • FIG. 2A is a schematic structural diagram of a multi-access mobile communication network according to an embodiment of the present invention.
  • 2B is a schematic structural diagram of a multi-access mobile communication network according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for changing a cell according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for changing a cell according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for changing a cell according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for changing a cell according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a second base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a first base station according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 11 is a structural diagram of a second base station according to an embodiment of the present disclosure.
  • FIG. 12 is a structural diagram of a terminal device according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method and a device for changing a cell, which is used to solve the problem that the user equipment is disconnected each time the terminal device is changed in the prior art, and the service of the terminal device is interrupted.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • At least one second configuration parameter generated by the second base station of the at least one second radio bearer to be established with the terminal device in the cell change process The terminal device is consistent with at least one first configuration parameter used by the at least one first radio bearer of the existing first base station, that is, each of the second configuration parameters
  • the value of the second information unit is consistent with any of the following: the value of the first information element corresponding to the corresponding first configuration parameter is the same, or the first information corresponding to the corresponding first configuration parameter is used.
  • the value of the unit continues to be maintained.
  • Each of the second configuration parameters corresponds to a second radio bearer
  • each of the first configuration parameters corresponds to a first radio bearer.
  • the terminal device does not need each configuration parameter corresponding to the at least one second radio bearer to be established in the cell change process.
  • the configuration is reconfigured, so that the user plane is not disconnected, the traffic of the terminal device is maintained, and the service performance is improved.
  • a base station is a device that accesses a terminal device to a wireless network, including but not limited to: an evolved Node B (eNB), a Node B (Node B, NB), and a home base station (for example, Home). Evolved NodeB, or Home Node B, HNB), and a macro base station and a micro base station in a multiple access scenario, wherein one base station can create at least one cell.
  • eNB evolved Node B
  • Node B Node B
  • HNB home base station
  • a terminal device also called a User Equipment (UE)
  • UE User Equipment
  • a terminal device is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, an in-vehicle device, and the like. In this application, only a mobile phone is taken as an example.
  • the embodiment of the invention provides a cell change method and device, which is applicable to a cell change scenario in various mobile communication networks, for example, a terminal device can only access a traditional communication network of one cell, and the terminal device can simultaneously access multiple In the scenario of a cell, for example, the mobile communication network architecture of HetNet.
  • a terminal device can only access a traditional communication network of one cell, and the terminal device can simultaneously access multiple In the scenario of a cell, for example, the mobile communication network architecture of HetNet.
  • the network architecture to which the method provided by the present application is applied will be described by taking only FIG. 1, FIG. 2A, and FIG. 2B as an example.
  • the embodiment of the present invention provides a mobile communication network architecture.
  • the terminal device can only access a cell corresponding to one base station.
  • the terminal is configured.
  • the time is T1
  • the cell 1 corresponding to the base station 1 is accessed, that is, the terminal device establishes a connection with the base station 1, and is three parallel services of the terminal device (ie, service 1, service 2, service 3,
  • Providing a service for example, the service 1 is a File Transfer Protocol (FTP) service
  • the service 2 is a session service
  • the service 3 is a video service, where the service 1, the service 2, and the service 3 respectively Corresponding to Radio Bearer 1 (DRB 1), Radio Bearer 2 (DRB 2), Radio Bearer 3 (DRB3).
  • DTP Radio Bearer 1
  • DRB 2 Radio Bearer 2
  • DRB3 Radio Bearer 3
  • Each radio bearer corresponds to a first configuration parameter, that is, three radio bearers correspond to three first configuration parameters.
  • the terminal device After receiving the handover message sent by the base station 1 or other network control node, the terminal device establishes a connection with the base station 2 at time T2, and establishes corresponding operations for service 1, service 2, and service 3, respectively.
  • the handover message may be sent when the terminal device moves from the coverage area of the base station 1 to the coverage area of the base station 2, the base station 1 fails, or the signal of the base station 2 The quality is better than the base station 1.
  • the terminal device establishes three seconds used by the radio bearer 1' (DRB 1'), the radio bearer 2' (DRB 2'), and the radio bearer 3' (DRB3'), respectively, between the base station 2.
  • the configuration parameters are consistent with the three first configuration parameters used by the terminal device to establish the radio bearer 1 (DRB 1), the radio bearer 2 (DRB 2), and the radio bearer 3 (DRB3), respectively.
  • the definition of consistency is described in detail in the subsequent embodiments. Because the generated second configuration parameter is consistent with the first configuration parameter, the terminal device does not need to reconfigure the three second configuration parameters during the cell change process, so that the user plane is not disconnected, and the The fluency of the service of the terminal device improves the performance of the service.
  • the embodiment of the present invention further provides another multi-access mobile communication network architecture.
  • the terminal device can simultaneously access multiple base stations.
  • a cell as shown in the figure, the terminal device accesses a cell corresponding to the base station A, the base station B, the base station C, and the base station D at the time of T1, and any one of the cells accessed by the terminal device is the terminal.
  • the master base station (MeNB) of the device, the cell of the master base station is the master cell (MCell) of the terminal device, and the remaining base stations are the secondary base stations of the terminal device.
  • MeNB master base station
  • MCell master cell
  • the cell of the secondary base station is a secondary cell (SCell) of the terminal device.
  • the cell change includes a change of the primary base station, and an action of adding, deleting, or modifying the secondary base station (including: adding, deleting, or modifying the secondary cell, adding, deleting, or modifying the secondary cell group), for example, at T2.
  • the terminal device deletes the cell corresponding to the base station A and the base station B, and adds the cell corresponding to the base station E and the base station F.
  • the cell change between the time T1 and the time T2 includes the change of the primary base station, The secondary cell is deleted and the secondary cell is deleted. If the cells corresponding to the base station A and the base station B are both the secondary cells of the terminal device, the cell change between the time T1 and the time T2 includes adding the secondary cell and deleting the secondary cell.
  • a macro cell is first created by a macro base station to implement a wide range of continuous network coverage. Then, a micro cell is created in the coverage area of the macro base station to create a micro cell. Overlapping coverage, such that the microcell provides a higher system capacity.
  • the terminal device can access a cell corresponding to multiple base stations at the same time. As shown in the figure, the terminal device accesses the macro cell corresponding to the macro base station at the time of T1, and simultaneously accesses the macro cell range. a micro cell corresponding to the micro base station 201, 202, and 203, wherein any one of the cells that the terminal device accesses is a primary cell of the terminal device, and the remaining cells are the terminal device. Secondary cell.
  • the cell change includes a change of the primary base station, and an action of adding, deleting, or modifying the secondary base station.
  • the addition, deletion, or modification of the secondary base station includes: adding, deleting, or modifying the secondary cell, adding, deleting, or modifying the secondary cell group. For example, at time T2, the terminal device switches the primary cell to the micro base station 205, 206. And the micro cell corresponding to any one of the 207 and the new sub cell, the micro cell corresponding to the micro cell 205, 206, and 207, except the cell of the primary cell, and deleting the secondary cell that has been accessed at time T1.
  • Radio bearer 1' (DRB 1') with the target primary base station or a new secondary base station
  • radio bearer 2' (DRB 2')
  • radio bearer 3' (DRB3')
  • the three second configuration parameters are consistent with the three first radio frequency bearers, namely, radio bearer 1, radio bearer 2, and radio bearer 3. Therefore, in the cell change process, the terminal device does not need to reconfigure the three second configuration parameters, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved.
  • the PDCP layer configuration parameter may include: a PDCP layer discard timer (Discard Timer), a ROHC switch (RohcSwitch), and a ROHC, in the PDCP re-establishment process. Highest Mode, Profiles compression protocol type, PDCP sequence number length (PDCP-SN-Size), reordering timer value (t-Reordering), radio bearer security input parameters: frequency information, PCI, etc.
  • the terminal device performs RLC layer configuration parameters for reconfiguration, such as RLC mode (RLC Mode), PDU maximum retransmission times (maxRetxThreshold AM), eNodeB AM mode, RLC ARQ maximum retransmission times, UE triggering.
  • RLC mode RLC Mode
  • PDU maximum retransmission times maxRetxThreshold AM
  • eNodeB AM mode RLC ARQ maximum retransmission times
  • T-PollRetransmit the UE prohibits the transmission of the status report timer (T-StatusProhibit)
  • T-StatusProhibit the UE AM mode receiver reordering timer (t-Reordering); during the MAC reset process, the terminal device needs to The MAC layer configuration parameters are reconfigured. For example, the Bj of each logical channel is initialized to 0. The timers used by the radio bearers are stopped and reset, and each cache (such as MSG3) is cleared to release all current processes (such as SR process and BSR process).
  • PHR process PHR process
  • C-RNTI Cell Radio Network Temporary Identifier
  • a base station that needs to establish a radio bearer with a terminal device is referred to as a second base station
  • an existing base station of the terminal device is referred to as a first base station. Therefore, the first base station and the second base station mentioned later will not be explained.
  • a cell change method can be applied to a cell change scenario in various mobile communication networks, as shown in FIG. 1, FIG. 2A, and FIG. 2B.
  • the method is used in the cell change process, and the base station that needs to establish a radio bearer with the terminal device, that is, the second base station.
  • the specific process of the method includes:
  • Step 301 The second base station receives a first cell change indication message sent by the network device for the terminal device, and determines at least one first configuration parameter used by the at least one first radio bearer between the terminal device and the first base station.
  • Each of the first radio bearers corresponds to one of the at least one first configuration parameter, where the first configuration parameter includes n first information units, where n is a natural number greater than or equal to 1.
  • the information element may be a parameter describing a protocol layer attribute in the radio bearer.
  • the n first information units may include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the network device is the first base station or a network control node
  • the cell change is a cell handover
  • the second base station is a target base station configured for the terminal device, where the terminal device is in a traditional mobile communication network.
  • a base station is a source base station of the terminal device, and the cell change indication message is a handover message;
  • the cell change includes: a change of the primary base station, and an action of adding, deleting, or modifying the secondary base station.
  • the addition, deletion, or modification of the secondary base station includes: adding, deleting, or modifying the secondary cell, and adding, deleting, or modifying the secondary cell group:
  • the second base station is a target primary base station configured for the terminal device, where the first base station is a source primary base station of the terminal device, and the cell change indication message is used when the cell is changed to a primary base station.
  • the first base station is a source primary base station of the terminal device
  • the cell change indication message is used when the cell is changed to a primary base station.
  • the second base station is a newly added secondary base station configured for the terminal device, or a secondary secondary base station corresponding to the newly added secondary cell, or a newly added auxiliary device.
  • a secondary base station corresponding to the cell group the first base station is a primary base station of the terminal device, or an existing secondary base station, and the cell change indication message is a new message added by the secondary base station; or
  • the second base station is a secondary base station to be modified configured for the terminal device, or a secondary base station corresponding to the secondary cell to be modified, or a secondary to be modified.
  • the secondary base station corresponding to the cell group, the first base station is the primary base station of the terminal device, or the existing secondary base station, and the cell change indication message is a secondary base station modification message.
  • the determining, by the second base station, the first configuration parameter used by the at least one radio bearer may include the following manners:
  • the first mode the second base station uses at least one configuration parameter corresponding to the stored at least one radio bearer as the at least one first configuration parameter used by the at least one first radio bearer; for example, a background configuration ( At least one configuration parameter corresponding to at least one radio bearer previously received and saved, as configured by Operation Administration and Maintenance (OAM).
  • OAM Operation Administration and Maintenance
  • the second base station receives the at least one first configuration parameter used by the at least one first radio bearer sent by the network device;
  • the second base station receives the at least one first configuration parameter used by the at least one first radio bearer sent by the first base station.
  • Step 302 The second base station generates at least one second configuration parameter based on the determined at least one first configuration parameter.
  • the second configuration parameter of the at least one second configuration parameter corresponds to a second radio bearer between the terminal device and the second base station, and the second configuration parameter includes n second information.
  • a unit, and a value of one of the n second information units is the same as a value of one of the n first information units, or is based on the n
  • the value of a first information element in the first information unit continues to be maintained.
  • the at least one second configuration parameter is consistent with the at least one first configuration parameter.
  • the information element can be a parameter describing the protocol layer attributes in the radio bearer.
  • the value of the information unit may be an attribute of the information unit, a type selection, a numerical determination, or a range determination.
  • the value of one of the n second information units is the same as the value of one of the n first information units, or is based on the n
  • the value of the first information unit in the first information unit continues to be maintained, and specifically includes at least one of the following manners:
  • the m first information units of the n first information units are the same as the m second information units of the n second information units, and the nm of the n second information units The value of the two information units is maintained based on the values of the nm first information units in the n first information units, where m is a natural number greater than or equal to 1 and less than n;
  • the n first information units and the n second information units have the same value
  • the values of the n second information units are maintained based on the values of the n first information units.
  • the information units in the n first information units and/or the n second information units are classified into two categories.
  • the one type is a static or semi-static parameter, that is, an information unit whose value is unchanged when the terminal device does not receive the reconfiguration of the network device.
  • security algorithm parameters For example: security algorithm parameters, header compression algorithm, the value of the window length of the send window, the maximum number of retransmissions, and so on.
  • the other type is a dynamic parameter, that is, a unit of information in which the terminal device may change value if the network device is not reconfigured.
  • the value of the information unit may change with time or the number of received and received data packets, and the value of the information unit may change.
  • the value of the second information unit is the same as the value of the first information unit.
  • the value of the second information unit is maintained based on the value of the first information unit.
  • the n first information units and/or the n second information units include information units of m static or semi-static parameter categories and information units of nm dynamic parameter categories
  • the n first The m first information units in the information unit are the same as the m second information units in the n second information units, and the values of the nm second information units in the n second information units are It is maintained based on the values of the n-m first information units in the n first information units.
  • n first information units and/or the n second information units are all information units of a static or semi-static parameter category
  • the n first information units and the n second information units are all information units of a static or semi-static parameter category
  • the n first information units and the n second information units are all the same.
  • the values of the n first information units are all based on the n first The value of the information unit continues to be maintained.
  • the terminal device determines the security algorithm parameter in the second configuration parameter according to the value of a group of information elements of the PDCP layer in the first configuration parameter, that is, the security algorithm parameter. value.
  • the value of the security algorithm parameter in the second configuration parameter is the same as the value of the security algorithm parameter in the first configuration parameter.
  • the terminal device encrypts the obtained data and/or signaling using the security algorithm parameters in the second configuration parameter.
  • the terminal device determines the value of the header compression algorithm in the second configuration parameter according to the value of the other group of information elements of the PDCP layer in the first configuration parameter, that is, the header compression algorithm.
  • the value of the header compression algorithm in the second configuration parameter is the same as the value of the header compression algorithm in the first configuration parameter.
  • the terminal device performs header compression on the obtained data by using a header compression algorithm in the second configuration parameter.
  • the terminal device determines the value of the sending counter in the second configuration parameter according to the value of one of the first configuration parameters, that is, the sending counter, where the sending counter is used to serve the uplink PDCP service data unit ( The data packets sent by the Service Data Unit (SDU) are counted.
  • the value of the sending counter in the second configuration parameter is maintained based on the value of the sending counter in the first configuration parameter.
  • the value of the sending counter is determined by the value of the sending data packet, and the value may be represented by the sequence number (Next_PDCP_TX_SN) and the super frame number (TX_HFN) of the data packet sent by the PDCP.
  • next_PDCP_TX_SN sequence number
  • TX_HFN superframe number
  • the terminal device determines the value of the retransmission counter in the second configuration parameter according to the value of another information unit retransmission counter in the first configuration parameter, where the retransmission counter is used to The data packets that need to be resent in the PDCP Service Data Unit (SDU) of the row are counted.
  • the value of the retransmission counter in the second configuration parameter is maintained based on the value of the counter in the first configuration parameter. For example, the sequence number and superframe number of the retransmission data packet of the next PDCP of the terminal device are not cleared, but the maintenance is continued based on the value of the current retransmission counter plus one.
  • the at least one type of information unit may be included in the n first information units: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter;
  • the n second information units may also include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the PDCP layer configuration parameter may be included in the first configuration parameter, and the first configuration parameter used by each radio bearer is consistent with the second configuration parameter used by the corresponding radio bearer, obviously, in the cell change process.
  • the second base station After the second base station determines the at least one second configuration parameter used by the at least one second radio bearer, the second base station sends the to the terminal device by using the first base station or the network device, so that the terminal device does not need to configure the PDCP layer.
  • the parameter reconfiguration prevents the PDCP from being re-established, and the key update is not triggered, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved.
  • the first configuration parameter may further include at least one of the following: an RLC layer configuration parameter and a MAC layer configuration parameter; and correspondingly, the second configuration parameter may further include at least one of the following: an RLC layer configuration Parameters and MAC layer configuration parameters.
  • the terminal device does not need to reconfigure the configuration parameters of the PDCP layer in the cell change process, and the RLC does not need to be reconstructed.
  • the terminal device does not need to reconfigure the configuration parameters of the layer 2 (L2) in the entire change process, so that the user plane is not disconnected, the service of the terminal device is maintained, and the service performance is improved. Further, the terminal device may acquire uplink synchronization information (Uplink Time Alignment Information), uplink grant resource (UL-SCH), and/or uplink uplink statically allocated physical uplink.
  • uplink synchronization information Uplink Time Alignment Information
  • UL-SCH uplink grant resource
  • PUCCH physical uplink control channel
  • the x first information units of the n first information units included in each first configuration parameter are variables, counters, and/or timers;
  • the x second information units of the n second information units included in the second configuration parameter generated based on each first configuration parameter are variables, counters, and/or timers;
  • the value of the x first information units in the n first information units included in each first configuration parameter is a first value
  • the value of the x second information units in the n second information units included in the second configuration parameter generated based on each first configuration parameter is a second value, and the second value is based on the first value Continuing maintenance, that is, not performing zeroing, stopping, and reset processing on variables, counters, and/or timers in each second configuration parameter of the terminal device, where x is a natural number greater than or equal to 1 and less than n
  • n first information units include information units of nm dynamic parameter categories
  • the nm first information units of the dynamic parameter category are variables, counters, and/or timers
  • x is nm
  • the n first information units include information units of nm dynamic parameter categories, and some of the first information units of the nm first information units that are dynamic parameter categories are other types than variables, counters, and timers.
  • x is less than nm.
  • the n-m first information units of the dynamic parameter category are variables, counters, and/or timers, and specifically include any one of the following cases:
  • each of the n-m first information units is one of a variable, a counter or a timer;
  • the second type a part of the first information unit of the mm first information unit is a variable, and another part of the first information unit is a counter; or a part of the first information unit is a variable, and another part of the first information unit is a timer; or A portion of the first information unit is a counter and another portion of the first information unit is a counter.
  • the n first information units include information units of three dynamic parameter categories, and then the three first information units are variables, counters, and/or timers, indicating: the three first information units. All of the three first information units are counters; or the three first information units are all timers; or one of the three first information units is a variable, The other two first information units are variables or timers; or one of the three first information units is a variable, one first information unit is a counter, and one first information unit is a timer.
  • the radio bearer established by the terminal device and the first base station is changed in the cell.
  • the value of the first configuration parameter used in the time therefore, when the cell is changed, only the first base station and the terminal device can acquire the first value, and therefore, the first configuration parameter determined by the second base station
  • the first value is sent by the first base station or the terminal device to the second base Station.
  • the terminal device when the terminal device is in a traditional mobile communication network, different types of services correspond to different radio bearers, the second base station is a target base station, and the at least one first configuration parameter is used in the A configuration of at least one second radio bearer between the terminal device and the second base station.
  • the secondary device adds, the secondary cell is added, and the secondary cell is added to the terminal device.
  • the group is newly added, the secondary base station is modified, the secondary cell is modified, or the secondary cell group is modified, the second base station is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, and a secondary base station corresponding to the newly added secondary cell group.
  • the terminal device applies the virtual configuration of the radio bearer corresponding to each service to the foregoing service in each change process.
  • the parameters, related variables and timer information are maintained based on the value of the cell change, and are not cleared, stopped, and reset.
  • the virtual configuration parameters of each radio bearer Background sources are arranged to the base station, the network device configuration to a second base station to the terminal device and the second base station, or a terminal; the terminal device and a network device consistent with the stored parameters are stored; or
  • the second base station is a target primary base station; and each time the secondary device is added to the secondary base station, the secondary cell is newly added, the secondary cell group is added, and the secondary base station is modified,
  • the second base station is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, a secondary base station corresponding to the newly added secondary cell group, and a secondary base station to be modified, to be modified.
  • the terminal device applies each service corresponding to the foregoing service Wireless configuration of virtual configuration parameters, associated variables and timer letters
  • the information is maintained based on the value of the cell change, and is not cleared, stopped, and reset.
  • the source of the virtual configuration parameters of each radio bearer is the background configuration to the base station, and the network device is configured to the terminal device and the The second base station is sent to the second base station, and the parameters saved by the terminal device and the network device are consistent.
  • the terminal device uses the radio bearer of each secondary cell and the secondary base station corresponding to each secondary cell group.
  • a common configuration parameter and the common configuration parameter is shared by the radio bearers, and is not associated with a secondary cell or a secondary cell group or a secondary base station;
  • the radio bearer of the secondary base station corresponding to the primary base station, each secondary cell, and each secondary cell group is Common configuration parameters that are commonly used, and the common configuration parameters are shared by the radio bearers, and are not associated with the primary base station, or a secondary cell or a secondary cell group or a secondary base station.
  • the connection between the terminal device and the first cell of the first base station is three parallel services, such as service 1 (such as FTP service), service 2 (for example, session service), and service 3 (for example, video service).
  • service 1 such as FTP service
  • service 2 for example, session service
  • service 3 for example, video service
  • the service is provided, and the service 1, the service 2, and the service 3 respectively correspond to the radio bearer 1 (DRB 1), the radio bearer 2 (DRB 2), and the radio bearer 3 (DRB3), and the radio bearer established by the terminal device and the first base station
  • the three first configuration parameters used include: configuration parameters of radio bearer 1 (DRB 1), configuration parameters of radio bearer 2 (DRB 2), and configuration parameters of radio bearer 3 (DRB3);
  • the above three first configuration parameters are used to establish a radio bearer of the above three services of the terminal device and the target base station when the terminal device switches each time; that is, each cell or base station changes,
  • each cell or base station changes
  • the configuration parameters of the service of the service 1, service 2, and service 3 are consistent with the three first configuration parameters. That is, the information unit included in the configuration parameter after the cell change is the same as the information unit of the configuration parameter corresponding to the cell change, or is maintained based on the value of the information unit corresponding to the configuration parameter corresponding to the cell change.
  • the variable or timer is based on the cell. The value at the time of change continues to be maintained, and the processing is performed without clearing, stopping, and resetting. If the information unit is a static or semi-static parameter, the value of the information unit of the changed configuration parameter is the same as the value of the information unit before the change. .
  • the change of the primary base station, the addition of the secondary base station, the addition of the secondary cell, the modification of the secondary base station, or the modification of the secondary cell are similar to the above, and are not described here.
  • the method further includes:
  • the second base station When the second base station determines that the connection between the second base station and the terminal device is not established, the second base station suspends the at least one second configuration parameter;
  • the second base station determines that the connection between the second base station and the terminal device is established, the second base station starts the suspended at least one second configuration parameter.
  • the at least one second configuration parameter needs to be sent to the first base station, and Forwarding, by the first base station, to the terminal device, triggering, by the terminal device, to establish a radio bearer with the second base station based on the at least one second configuration parameter, and therefore, if the second base station generates the at least one second After the parameter is configured, the connection between the second base station and the terminal device is not established, and if the second base station immediately starts the at least one second configuration parameter, the terminal device does not cause the terminal device to The radio bearer of the second base station is established, and the resources of the second base station are wasted.
  • the second base station After the second base station generates the at least one second configuration parameter, the second base station does not receive the connection establishment request of the terminal device. And suspending the at least one second configuration parameter, and after the second base station receives the connection establishment request triggered by the terminal device, the second base station starts to be suspended. Said at least one second parameter configuration, so can improve the resource utilization of the second base station.
  • step 301 after the second base station receives the first cell change indication message, the method further includes:
  • the medium HARQ information includes information such as a HARQ process, a HARQ timer value, and a HARQ retransmission;
  • the second base station generates second HARQ information for the second base station based on the determined first HARQ information, where the second HARQ information includes p second HARQ information units, and the p The value of one second HARQ information element in the second HARQ information unit is the same as the value of one of the first HARQ information units in the p first HARQ information units, or is based on the p first The value of a first HARQ information element in the HARQ information unit is maintained, that is, the second HARQ information is consistent with the first HARQ information;
  • the value of one of the second HARQ information units of the p second HARQ information units is the same as the value of one of the first one HARQ information units of the p first HARQ information units, or is based on The value of the first HARQ information unit in the first one of the p first HARQ information units is maintained, and specifically includes at least one of the following manners:
  • the q first HARQ information units in the p first HARQ information units are the same as the q second HARQ information units in the p second HARQ information units, and the p second HARQ information units
  • the value of the pq second HARQ information units is maintained based on the values of the pq first HARQ information units in the p first HARQ information units, where q is greater than or equal to 1 and less than p Natural number;
  • the p first HARQ information units are the same as the p second HARQ information units;
  • the values of the p second HARQ information units are maintained based on the values of the p first HARQ information units.
  • the determining, by the second base station, the first HARQ information including:
  • the second base station receives the first HARQ information sent by the first base station.
  • the data may be transmitted between the first base station and the terminal device before the cell is changed. Therefore, when the cell is changed, the first base station maintains the timing in the uplink and downlink data transmission direction HARQ process. And retransmission information, and response messages of uplink and downlink data transmission directions, etc., if the cell is changed after the cell is changed, ensuring the smoothness and security of the service data transmission of the terminal device, The second base station should inherit the HARQ information maintained by the first base station when the cell is changed.
  • the method further includes:
  • the second base station starts the second HARQ information when a connection between the second base station and the terminal device is established.
  • the second base station Similar to the second base station suspending the second configuration parameter, if the connection between the second base station and the terminal device has not been established, the second base station immediately starts the second HARQ information.
  • the second base station does not perform data transmission with the terminal device, but wastes resources of the second base station. Therefore, after the second base station establishes a connection with the terminal device, the second base station starts the second HARQ information, which can avoid waste of the second base station resource.
  • the second base station After the first base station determines the first HARQ information that is maintained by the first base station, the second base station generates a second HARQ that is consistent with the first HARQ information according to the first HARQ information.
  • the information can ensure the smoothness and security of the service data transmission of the terminal device after the cell is changed.
  • the cell change method provided by the embodiment of the present invention is generated by the second base station that is to be established with the terminal device to establish at least one second radio bearer in the cell change process.
  • the at least one second configuration parameter is consistent with the at least one first configuration parameter used by the terminal device and the at least one first radio bearer of the existing first base station, that is, each of the second configuration parameters
  • the value of the second information unit is consistent with any of the following: the value of the first information element corresponding to the corresponding first configuration parameter is the same, or the first information element corresponding to the corresponding first configuration parameter. The value continues to be maintained.
  • Each of the second configuration parameters corresponds to a second radio bearer, and each of the first configuration parameters corresponds to a first radio bearer.
  • the terminal device does not need each configuration parameter corresponding to the at least one second radio bearer to be established in the cell change process.
  • the configuration is reconfigured, so that the user plane is not disconnected, the traffic of the terminal device is maintained, and the service performance is improved.
  • the embodiment of the invention further provides a cell change method, which can be applied to various mobile communication networks.
  • a cell change method which can be applied to various mobile communication networks.
  • the method is used for a terminal device that needs to establish a radio bearer in a cell change process. Referring to FIG. 4, the specific process of the method includes:
  • Step 401 The terminal device receives a second cell change indication message sent by the network device, determines, according to the second cell change indication message, a second base station that is changed by the terminal device cell, and determines the terminal device and the second At least one second configuration parameter used by the at least one second radio bearer between the base stations, where each second radio bearer corresponds to one of the at least one second configuration parameter, the network device is A base station or network control node.
  • the second base station is a target base station configured for the terminal device, and the first base station is the terminal device, where the terminal device is in a traditional mobile communication network, and the cell change is a cell handover.
  • the source base station, the cell change indication message is a handover message;
  • the cell change includes: changing the primary base station, adding or deleting the secondary cell, adding or deleting the secondary cell group, and modifying the secondary cell, etc.:
  • the second base station is a target primary base station configured for the terminal device, where the first base station is a source primary base station of the terminal device, and the cell change indication message is used when the cell is changed to a primary base station.
  • the first base station is a source primary base station of the terminal device
  • the cell change indication message is used when the cell is changed to a primary base station.
  • the second base station is a newly added secondary base station configured for the terminal device, or a secondary secondary base station corresponding to the newly added secondary cell, or a newly added auxiliary device.
  • a secondary base station corresponding to the cell group the first base station is a primary base station of the terminal device, or an existing secondary base station, and the cell change indication message is a new message added by the secondary base station; or
  • the second base station is a secondary base station with a modified secondary base station, a secondary base station corresponding to the secondary cell to be modified, or a secondary cell to be modified.
  • the secondary base station corresponding to the group, the first base station is the primary base station of the terminal device, or the existing secondary base station, and the cell change indication message is a secondary base station modification message.
  • the at least one first radio bearer between the terminal device and the first base station uses at least one first configuration parameter, where each first radio bearer corresponds to the at least one first configuration parameter.
  • a first configuration parameter where the first configuration parameter includes n first information units, Where n is a natural number greater than or equal to 1;
  • each of the at least one second configuration parameter includes n second information units, and the value of one of the n second information units is the same as the The value of one of the n first information units is the same, or is maintained based on the value of one of the n first information units.
  • the value of one of the n second information units is the same as the value of one of the n first information units, or is based on the n
  • the value of a first information unit in an information unit continues to be maintained, and specifically includes at least one of the following manners:
  • the m first information units of the n first information units are the same as the m second information units of the n second information units, and the nm of the n second information units The value of the two information units is maintained based on the values of the nm first information units in the n first information units, where m is a natural number greater than or equal to 1 and less than n;
  • the n first information units and the n second information units have the same value
  • the values of the n second information units are maintained based on the values of the n first information units.
  • the n first information units include at least one type of information unit: an information unit of a packet data convergence protocol PDCP layer configuration parameter, and a radio link control RLC.
  • the n second information units also include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the terminal device does not need to be in the cell change process, because the at least one second configuration parameter includes the PDCP layer configuration parameter, and the at least one first configuration parameter is consistent with the at least one second configuration parameter.
  • the configuration parameters of the PDCP layer are reconfigured to avoid PDCP reconstruction, and the key update is not triggered, so that the user plane is not disconnected.
  • the fluency of the service of the terminal device improves the performance of the service.
  • the first configuration parameter further includes at least one of the following: a radio link control RLC layer configuration parameter and a media access control MAC layer configuration parameter;
  • the second configuration parameter further includes at least one of the following: an RLC layer configuration parameter and a MAC layer configuration parameter.
  • the terminal device does not need to be the PDCP layer in the cell change process.
  • the configuration parameters are reconfigured, and the RLC does not need to be rebuilt, and the contents of the MAC layer cache are retained, the information of the logical channel is saved, the related variables and timer information are maintained, and the zeroing, stopping, and reset processing are not performed.
  • the terminal device may acquire the uplink synchronization information, the resources of the uplink shared channel that are allowed to be used in the uplink, and/or the physical uplink control channel resources that are allocated in the uplink semi-statically, and configure the acquired information and resources. , improve the efficiency of business processing.
  • the x first information units in the n first information units included in each first configuration parameter are variables, counters, and/or timers;
  • the x second information units of the n second information units included in the second configuration parameter generated based on each first configuration parameter are variables, counters, and/or timers;
  • the value of the x first information units in the n first information units included in each first configuration parameter is a first value
  • the value of the x second information units in the n second information units included in the second configuration parameter generated based on each first configuration parameter is a second value, and the second value is based on the first value Continuing to maintain, that is, not performing zeroing, stopping, and resetting processing on variables, counters, or timers in the second configuration parameter of the terminal device, where x is a natural number greater than or equal to 1 and less than n, when the n
  • the first information unit includes information units of nm dynamic parameter categories, and wherein the first information units of the dynamic parameter category are variables, counters, and/or timers, x is nm, when the n
  • An information unit includes information units of nm dynamic parameter categories, and wherein some of the first information units of the nm first information units of the dynamic parameter category are other types of dynamic parameters other than variables, counters, and timers, x Less than nm.
  • the first value is sent by the first base station or the terminal device to the second base station.
  • the terminal device when the terminal device is in a traditional mobile communication network, different types of services correspond to different radio bearers, and the first configuration parameter used by the at least one radio bearer is used in the The terminal device establishes a corresponding radio bearer of the terminal device and the target base station each time the cell handover is performed; that is, the subsequent application of the terminal device to the foregoing service is changed each time the secondary cell or the secondary base station is changed.
  • the virtual configuration parameters of the radio bearers corresponding to each service, related variables and timer information are maintained based on the value of the cell change, and are not cleared, stopped, and reset processed; wherein, the virtual configuration of each radio bearer
  • the source of the parameter is the background configuration to the base station, the network device is configured to the terminal device and the second base station, or the terminal sends the second base The station saves the parameters saved by the terminal device and the network device.
  • the terminal device when the terminal device is in a traditional mobile communication network, different types of services correspond to different radio bearers, the second base station is a target base station, and the at least one first configuration parameter is used in the A configuration of at least one second radio bearer between the terminal device and the second base station.
  • the secondary device adds, the secondary cell is added, and the secondary cell is added to the terminal device.
  • the group is newly added, the secondary base station is modified, the secondary cell is modified, or the secondary cell group is modified, the second base station is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, and a secondary base station corresponding to the newly added secondary cell group.
  • the terminal device applies the virtual configuration of the radio bearer corresponding to each service to the foregoing service in each change process.
  • the parameters, related variables and timer information are maintained based on the value of the cell change, and are not cleared, stopped, and reset.
  • the virtual configuration parameters of each radio bearer Background sources are arranged to the base station, the network device configuration to a second base station to the terminal device and the second base station, or a terminal; the terminal device and a network device consistent with the stored parameters are stored; or
  • the second base station is a target primary base station; and each time the secondary device is added to the secondary base station, the secondary cell is newly added, the secondary cell group is added, and the secondary base station is modified,
  • the second base station is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, a secondary base station corresponding to the newly added secondary cell group, and a secondary base station to be modified, to be modified.
  • the terminal device applies each service corresponding to the foregoing service Wireless configuration of virtual configuration parameters, associated variables and timer letters
  • the information is maintained based on the value of the cell change, and is not cleared, stopped, and reset.
  • the source of the virtual configuration parameters of each radio bearer is the background configuration to the base station, and the network device is configured to the terminal device and the The second base station is sent to the second base station, and the parameters saved by the terminal device and the network device are consistent.
  • the method further includes:
  • the terminal device determines that the connection between the second base station and the terminal device is not established, the terminal device suspends the at least one second configuration parameter;
  • the terminal device determines that the connection between the second base station and the terminal device is established, the terminal device restarts the suspended at least one second configuration parameter.
  • step 401 the Determining, by the terminal device, the at least one second configuration parameter, which does not require multiple signaling interactions, and takes a short time. Therefore, if the terminal device determines the at least one second configuration parameter, the second base station and the The connection between the terminal devices has not been established. If the terminal device immediately starts the at least one second configuration parameter, the terminal device does not establish a radio bearer with the second base station, but the above-mentioned wireless device is wasted.
  • the terminal device hangs the second configuration parameter after determining the at least one second configuration parameter, and the connection between the second base station and the terminal device is successfully established. And after the connection between the second base station and the terminal device is established, the terminal device starts the suspended second configuration parameter, so that the terminal device can be improved. Source utilization.
  • the terminal device determines the second configuration parameter used by the at least one radio bearer, including the following manners:
  • the terminal device associates the stored at least one radio bearer with the at least one configuration parameter as the at least one second configuration parameter used by the at least one second radio bearer;
  • the terminal device receives the at least one second configuration parameter used by the network device or the at least one second radio bearer sent by the first base station;
  • the third mode the terminal device receives the configuration parameter unchanged indication sent by the network device or the first base station, and according to the configuration parameter unchanged indication, at least one configuration corresponding to the stored at least one radio bearer a parameter, as the at least one second configuration parameter used by the at least one second radio bearer, the configuration parameter unchanged indication, configured to notify the terminal device to establish according to at least one configuration parameter stored in the terminal device The at least one second radio bearer.
  • Step 402 The terminal device establishes a corresponding second radio bearer according to each determined second configuration parameter of the at least one second configuration parameter.
  • the method further includes:
  • the terminal device Determining, by the terminal device, the third hybrid automatic repeat request HARQ information that is maintained by the terminal device, where the third HARQ information includes p third HARQ information units, where p is greater than or equal to 1 Natural number
  • fourth HARQ information for the second base station, where the fourth HARQ information includes the p fourth HARQ information units, and the p
  • the value of a fourth HARQ information element in the fourth HARQ information unit is the same as the value of one of the three third HARQ information units, or is based on the p third HARQ information.
  • the value of a third HARQ information element in the unit continues to be maintained, that is, the fourth HARQ information is consistent with the third HARQ information.
  • the value of one fourth HARQ information element in the p fourth HARQ information units is the same as the value of one third HARQ information unit in the p third HARQ information units, or is based on The value of the third HARQ information unit in the third third HARQ information unit continues to be maintained, and specifically includes at least one of the following manners:
  • the q third HARQ information units in the p third HARQ information units are the same as the q fourth HARQ information units in the p fourth HARQ information units, and the p fourth HARQ information units
  • the value of the pq fourth HARQ information unit in the middle is based on the p third
  • the values of the p-q third HARQ information units in the HARQ information element are maintained, where q is a natural number greater than or equal to 1 and less than p;
  • the p third HARQ information units are the same as the p fourth HARQ information units;
  • the values of the p fourth HARQ information units are maintained based on the values of the p third HARQ information units.
  • the data transmission may be performed between the first base station and the terminal device before the cell is changed. Therefore, when the cell is changed, the terminal device maintains uplink and downlink data transmission directions HARQ for the first base station.
  • the fourth HARQ information generated by the second base station should inherit the HARQ information that is maintained for the first base station when the cell is changed.
  • the method further includes:
  • the terminal device Similar to the suspension of the second configuration parameter by the second base station, if the connection between the second base station and the terminal device has not been established, the terminal device immediately starts the fourth HARQ information.
  • the second base station also does not perform data transmission with the terminal device, but wastes resources of the terminal device. Therefore, when the second base station establishes a connection with the terminal device, the terminal device restarts the fourth HARQ information, thereby avoiding waste of the terminal device resources.
  • the terminal device After the third device determines the third HARQ information that is maintained by the first base station, the terminal device generates, according to the third HARQ information, a fourth that is consistent with the third HARQ information for the second base station.
  • the HARQ information can ensure the smoothness and security of the service data transmission of the terminal device after the cell is changed.
  • the cell change method provided by the embodiment of the present invention is implemented in the terminal device.
  • the at least one second configuration parameter generated by the terminal device is consistent with the at least one first configuration parameter used by the terminal device and the at least one first radio bearer of the existing first base station. That is, the value of each of the second information units in each of the second configuration parameters is consistent with any one of the following: the same value as the corresponding first information unit in the corresponding first configuration parameter, or based on the corresponding The value of the corresponding first information unit in the first configuration parameter continues to be maintained.
  • Each of the second configuration parameters corresponds to a second radio bearer
  • each of the first configuration parameters corresponds to a first radio bearer.
  • the terminal device does not need each configuration parameter corresponding to the at least one second radio bearer to be established in the cell change process.
  • the configuration is reconfigured, so that the user plane is not disconnected, the traffic of the terminal device is maintained, and the service performance is improved.
  • the base station that needs to establish a radio bearer with the terminal device in the cell change process is called a second base station, and the base station existing in the terminal device (that is, the wireless device has been established with the terminal device).
  • the base station to be carried is referred to as a first base station;
  • the cell change process is: performing data transmission between the first base station and the terminal device; the first base station sends a cell change indication message to the terminal device, and stops receiving and/or transmitting data; After determining the configuration parameter, the base station forwards the configuration parameter to the terminal device by using the first base station, where the terminal device establishes a radio bearer with the second base station by using the configuration parameter; After the establishment of the radio bearer of the second base station, the terminal device starts to send data to the second base station or receive data sent by the second base station.
  • the terminal device is interrupted until the establishment of the radio bearer of the terminal device and the second base station is completed. All data transmissions result in delays in service data transmission and reduce the user experience.
  • the embodiment of the present invention further provides a cell change method, as shown in FIG. 5, The method flow includes:
  • Step 501 After the first base station sends a cell change indication message to the terminal device, continue with the terminal.
  • the end device performs data transmission, where the first base station performs data transmission with the terminal device, and the first base station sends data to the terminal device, and/or receives data sent by the terminal device.
  • Step 502 After the first base station receives the cell change complete message sent by the terminal device or the second base station, stop performing data transmission with the terminal device, where the cell change completion message is the terminal device.
  • the connection with the second base station establishes a success message or the released terminal device context message.
  • the method further includes:
  • the first base station forwards data to be sent to the terminal device to the second base station.
  • the first base station After the first base station sends the cell change indication message to the terminal device, and after receiving the cell change completion message, the data transmission is continued with the terminal device until the terminal device and the second device are used.
  • the connection establishment of the base station is completed, so that the data transmission of the terminal device is not interrupted, the service data transmission is not delayed, and the user experience is improved.
  • the present invention further provides a cell change method, as shown in FIG. 6, including:
  • Step 601 After receiving the cell change indication message sent by the first base station, the terminal device continues to perform data transmission with the first base station, and does not interrupt the connection with the first base station, where the terminal device and the terminal device
  • the data transmission by the first base station includes: the terminal device transmitting data to the first base station, and/or receiving data sent by the first base station.
  • Step 602 The terminal device establishes a connection with the second base station according to the cell change indication message.
  • Step 603 The terminal device performs data transmission with the second base station.
  • the method further includes:
  • the terminal device stops data transmission with the first base station
  • the terminal device After receiving the release indication message sent by the first base station or the second base station, the terminal device stops performing data transmission with the first base station, and the release indication message is used to notify the terminal device to be disconnected. Opening a connection with the first base station.
  • the terminal device After receiving the cell change indication message, the terminal device continues to perform data transmission with the terminal device until the connection between the terminal device and the second base station is completed, so that the terminal device ensures that the connection between the terminal device and the second base station is completed.
  • the data transmission of the terminal device is not interrupted, and the service data transmission is not delayed, thereby improving the user experience.
  • the embodiment of the present invention further provides a second base station, which is used to implement a cell change method as shown in FIG. 3.
  • the second base station 700 includes: a receiving unit 701 and a processing unit. 702, wherein
  • the receiving unit 701 is configured to receive a first cell change indication message that is sent by the network device to the terminal device;
  • the processing unit 702 is configured to determine at least one first configuration parameter used by the at least one first radio bearer between the terminal device and the first base station, where each first radio bearer corresponds to the at least one first configuration parameter a first configuration parameter, the first configuration parameter comprising n first information units, wherein n is a natural number greater than or equal to 1;
  • the second configuration parameter includes n second information units, and the value of one of the n second information units and the n first information The value of a first information unit in the unit is the same, or is maintained based on the value of one of the n first information units.
  • the value of one of the n second information units is the same as the value of one of the n first information units, or is based on the n
  • the value of the first information unit in the first information unit continues to be maintained, and specifically includes at least one of the following manners:
  • the m first information units of the n first information units are the same as the m second information units of the n second information units, and the nm of the n second information units The value of the two information units is maintained based on the values of the nm first information units in the n first information units, where m is a natural number greater than or equal to 1 and less than n;
  • the n first information units and the n second information units have the same value
  • the values of the n second information units are maintained based on the values of the n first information units.
  • the network device is a first base station or a network control node
  • the first base station 700 is a target base station configured for the terminal device
  • the first base station is a source base station of the terminal device
  • the first cell change indication message is a handover message
  • the first base station 700 is a target primary base station configured for the terminal device
  • the first base station is a source primary base station of the terminal device
  • the first cell change indication message is a handover message
  • the first base station 700 is a new secondary base station configured for the terminal device, or a secondary base station corresponding to the newly added secondary cell, or a secondary base station corresponding to the newly added secondary cell group
  • the first base station 700 is a secondary base station to be modified for the terminal device, or a secondary base station corresponding to the secondary cell to be modified, or a secondary base station corresponding to the secondary cell group to be modified
  • the n first information units include at least one type of information unit: an information unit of a packet data convergence protocol PDCP layer configuration parameter, an information unit of a radio link control RLC layer configuration parameter, and a media access control Information element of the MAC layer configuration parameter;
  • the n second information units also include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the x first information units of the n first information units included in each first configuration parameter are variables, counters, and/or timers;
  • the x second information units of the n second information units included in the second configuration parameter generated based on each first configuration parameter are variables, counters, and/or timers;
  • the value of the x first information units in the n first information units included in each first configuration parameter is a first value
  • the value of the x second information units in the n second information units included in the second configuration parameter generated based on each first configuration parameter is a second value, and the second value is based on the first value Continued maintenance, where x is a natural number greater than or equal to 1 and less than n.
  • the corresponding time is:
  • the first value is sent by the first base station or the terminal device to the receiving unit 701.
  • the second base station 700 is a target base station, and the at least one first configuration parameter is used between the terminal device and the second base station 700. At least one configuration of the second radio bearer; or
  • the second base station 700 is a new secondary base station, each time the terminal device is newly added, the secondary cell is added, the secondary cell is added, the secondary base station is modified, the secondary cell is modified, or the secondary cell is modified.
  • the second base station 700 is a target primary base station; and each time the secondary device is added to the secondary base station, the secondary cell is added, the secondary cell group is added, and the secondary base station is modified.
  • the second base station 700 is a new secondary base station, a secondary base station corresponding to the newly added secondary cell, a secondary base station corresponding to the newly added secondary cell group, and a secondary base station to be modified.
  • the at least one first configuration parameter is configured by the second radio bearer.
  • processing unit 702 is further configured to:
  • the at least one second configuration parameter that is suspended is started.
  • the processing unit 702 when the determining, by the processing unit 702, the at least one first configuration parameter used by the at least one first radio bearer, the processing unit 702 is specifically configured to:
  • the receiving unit 701 is further configured to receive the at least one first configuration parameter used by the at least one first radio bearer sent by the network device; or the receiving unit 701 is further configured to receive the first base station The at least one first configuration parameter used by the at least one first radio bearer to be sent; the processing unit 702, configured to determine the at least the at least one first radio bearer received by the receiving unit 701 A first configuration parameter.
  • processing unit 702 is further configured to:
  • the receiving unit 701 After the receiving unit 701 receives the first cell change indication message, determining, by the first base station, the first hybrid automatic repeat request HARQ information that is maintained by the first base station, where the first HARQ information includes p a first HARQ information element, wherein p is a natural number greater than or equal to 1;
  • the HARQ information includes p second HARQ information units, and the value of one of the p second HARQ information units and the p first HARQs
  • the value of one of the first HARQ information units in the information unit is the same, or is maintained based on the value of one of the first one HARQ information units of the p first HARQ information units;
  • the receiving unit 701 is further configured to:
  • the processing unit 702 is specifically configured to: when determining the first HARQ information:
  • processing unit 702 is further configured to:
  • the second HARQ information After generating the second HARQ information for the second base station 700, determining that the connection between the second base station 700 and the terminal device is established, the second HARQ information is started.
  • the embodiment of the present invention further provides a terminal device, which is used to implement a cell change method as shown in FIG. 4.
  • the terminal device 800 includes: a receiving unit 801 and a processing unit 802. among them,
  • the receiving unit 801 is configured to receive a second cell change indication message sent by the network device.
  • the processing unit 802 is configured to determine, according to the second cell change indication message, a second base station that is changed by the terminal device 800, and determine at least one second wireless between the terminal device 800 and the second base station. Carrying at least one second configuration parameter used by the bearer, wherein each second radio bearer corresponds to one of the at least one second configuration parameter, the network device being a first base station or a network control node;
  • the second base station is a target base station configured to the terminal device 800
  • the first base station is a source base station of the terminal device 800
  • the second cell change indication message is a handover message
  • the first base station is a source primary base station of the terminal device 800
  • the second cell change indication message is a handover message
  • the second base station is a new secondary base station configured to the terminal device 800, or a secondary base station corresponding to the newly added secondary cell, or a secondary base station corresponding to the newly added secondary cell group
  • the second base station is a secondary base station to be modified for the terminal device 800, or a secondary base station corresponding to the secondary cell to be modified, or a secondary base station corresponding to the secondary cell group to be modified
  • the first base station For the primary base station of the terminal device 800, or the existing secondary base station, the second cell change indication message is a secondary base station modification message.
  • the at least one first radio bearer between the terminal device 800 and the first base station uses at least one first configuration parameter, where each first radio bearer corresponds to the at least one first configuration parameter.
  • a first configuration parameter the first configuration parameter includes n first information units, where n is a natural number greater than or equal to 1;
  • each of the at least one second configuration parameter includes n second information units, and the value of one of the n second information units is the same as the The value of one of the n first information units is the same, or is maintained based on the value of one of the n first information units.
  • the value of one of the n second information units is the same as the value of one of the n first information units, or is based on the n
  • the value of the first information unit in the first information unit continues to be maintained, and specifically includes at least one of the following manners:
  • the m first information units of the n first information units are the same as the m second information units of the n second information units, and the nm of the n second information units The value of the two information units is maintained based on the values of the nm first information units in the n first information units, where m is a natural number greater than or equal to 1 and less than n;
  • the n first information units and the n second information units have the same value
  • the values of the n second information units are maintained based on the values of the n first information units.
  • the n first information units include at least one type of information unit: an information unit of a packet data convergence protocol PDCP layer configuration parameter, an information unit of a radio link control RLC layer configuration parameter, and a media access control Information element of the MAC layer configuration parameter;
  • the n second information units also include at least one type of information unit: an information unit of a PDCP layer configuration parameter, an information unit of an RLC layer configuration parameter, and an information unit of a MAC layer configuration parameter.
  • the x first information units in the n first information units included in each first configuration parameter are variables, counters, and/or timers;
  • the x second information units of the n second information units included in the second configuration parameter generated based on each first configuration parameter are variables, counters, and/or timers;
  • the value of the x first information units in the n first information units included in each first configuration parameter is a first value
  • the value of the x second information units in the n second information units included in the second configuration parameter generated based on each first configuration parameter is a second value, and the second value is based on the first value Continued maintenance, where x is a natural number greater than or equal to 1 and less than n.
  • the corresponding time is:
  • the first value is sent by the first base station or the terminal device 800 to the second base station.
  • the second base station is a target base station, and the at least one first configuration parameter is used between the terminal device 800 and the second base station.
  • the second base station is a new secondary base station, each time the terminal device 800 is newly added, the secondary cell is newly added, the secondary cell group is newly added, the secondary base station is modified, the secondary cell is modified, or the secondary cell group is modified.
  • the second base station is a target primary base station; and each time the secondary device 800 is added to the secondary base station, the secondary cell is added, the secondary cell group is added, and the secondary base station is added.
  • the second base station is a new secondary base station, a secondary secondary base station corresponding to the newly added secondary cell, a secondary base station corresponding to the newly added secondary cell group, and a secondary base station to be modified.
  • the at least one first configuration parameter used for at least one between the terminal device 800 and the second base station
  • the at least one first configuration parameter is configured by the second radio bearer.
  • processing unit 802 is further configured to:
  • the at least one second configuration parameter After determining the at least one second configuration parameter, determining that the connection between the second base station and the terminal device 800 is not established before establishing the second radio bearer, the at least one second configuration The parameter hangs;
  • the suspended at least one second configuration parameter is restarted.
  • processing unit 802 is specifically configured to: when determining the at least one second configuration parameter used by the at least one second radio bearer:
  • the receiving unit 801 is further configured to receive the at least one second configuration parameter used by the network device or the at least one second radio bearer sent by the first base station, where the processing unit 802 is configured to determine The at least one second configuration parameter used by the at least one second radio bearer received by the receiving unit 801 or
  • the receiving unit 801 is further configured to receive a configuration parameter unchanged indication sent by the network device or the first base station, where the processing unit 802 is configured to: store at least one wireless according to the configuration parameter unchanged indication. Carrying the corresponding at least one configuration parameter, as the at least one second configuration parameter used by the at least one second radio bearer, the configuration parameter unchanged indication, for notifying the terminal device 800 according to the terminal device 800 The at least one configuration parameter stored in the at least one second radio bearer is established.
  • processing unit 802 is further configured to:
  • the receiving unit 801 After the receiving unit 801 receives the second cell change indication message, determining, by the terminal device 800, the third hybrid automatic repeat request HARQ information that is maintained by the first base station, where the third HARQ information includes p a third HARQ information element, wherein p is a natural number greater than or equal to 1;
  • the fourth HARQ information includes p fourth HARQ information units, and the p fourth HARQ information
  • the value of a fourth HARQ information element in the unit is the same as the value of one of the three third HARQ information units, or is based on one of the p third HARQ information units.
  • the value of the third HARQ information element continues to be maintained.
  • processing unit 802 is further configured to:
  • the suspended fourth HARQ information is restarted.
  • the embodiment of the present invention further provides a first base station, which is used to implement a cell change method as shown in FIG. 5.
  • the first base station includes: a sending unit 901, and a processing unit. 902, receiving unit 903, wherein
  • the sending unit 901 is configured to send a cell change indication message to the terminal device.
  • the processing unit 902 is configured to continue to perform data transmission with the terminal device after the sending unit 901 sends the cell change indication message, where the processing unit 902 performs data transmission with the terminal device, including: sending The unit 904 transmits data to the terminal device, and/or receives data transmitted by the terminal device through the receiving unit 903.
  • the receiving unit 903 is configured to receive a cell change complete message sent by the terminal device or the second base station;
  • the processing unit 902 is further configured to stop performing data transmission with the terminal device after the receiving unit 903 receives the cell change complete message sent by the terminal device or the second base station, where the cell change completion message is The connection between the terminal device and the second base station establishes a success message or the released terminal device context message.
  • the method is further configured to:
  • Data to be transmitted to the terminal device is forwarded to the second base station by the transmitting unit 901.
  • the embodiment of the present invention further provides a terminal device, which is used to implement a cell change method as shown in FIG. 6.
  • the terminal device 1000 includes: a receiving unit 1001, and a processing unit 1002. , sending unit 1003, wherein
  • the receiving unit 1001 is configured to receive a cell change indication message sent by the first base station;
  • the processing unit 1002 is configured to continue to perform data transmission with the first base station after the receiving unit 1001 receives the cell change indication message sent by the first base station, without interrupting the a connection of a base station, wherein the processing unit 1002 performs data transmission with the first base station, including: transmitting, by the sending unit 1003, data to the first base station, and/or receiving, by the receiving unit 1001, The data sent by the first base station.
  • the processing unit 1002 is further configured to establish a connection with the second base station according to the cell change indication message;
  • processing unit 1002 is further configured to:
  • the receiving unit 1001 After receiving the release indication message sent by the first base station or the second base station, the receiving unit 1001 stops data transmission with the first base station, and the release indication message is used to notify the terminal device. Disconnecting from the first base station.
  • the present invention also provides a second base station, which is used to implement the function of the second base station in the cell change method shown in FIG. 3 and FIG. 7.
  • the second base station 1100 includes: a receiver. 1101, a processor 1102, a bus 1103, a memory 1104, and a transmitter 1105, where
  • the receiver 1101, the processor 1102, the memory 1104, and the transmitter 1105 are connected to each other through a bus 1103;
  • the bus 1103 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (extended industry standard architecture). Referred to as EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.
  • the transmitter 1105 is configured to send a message to the terminal device, the network device, and the first base station, where the receiver 1101 is configured to receive the terminal device, the network device, and the message sent by the first base station, for example, the receiving network device is configured for the terminal device.
  • the first cell change indication message or the like transmitted.
  • the processor is configured to implement a cell change method as shown in FIG. 3, including:
  • each first radio bearer corresponds to the at least one first configuration parameter a first configuration parameter of the number, the first configuration parameter comprising n first information units, wherein n is a natural number greater than or equal to 1;
  • the second configuration parameter includes n second information units, and a value of one of the n second information units and the n first information units The value of one of the first information units is the same, or is maintained based on the value of one of the n first information units.
  • processor 1102 is further configured to:
  • the at least one second configuration parameter that is suspended is started.
  • the processor 1102 is specifically configured to: when determining the at least one first configuration parameter used by the at least one first radio bearer:
  • processor 1102 is further configured to:
  • the first base station After receiving the first cell change indication message, determining, by the first base station, the first hybrid automatic repeat request HARQ information that is maintained by the first base station, where the first HARQ information includes p first HARQ information units Where p is a natural number greater than or equal to 1;
  • the second HARQ information includes p second HARQ information units
  • the value of one second HARQ information element in the p second HARQ information units is the same as the value of one of the first one HARQ information units in the p first HARQ information units, or is based on the p
  • the value of a first HARQ information element in the first HARQ information element continues to be maintained;
  • the determining the first HARQ information includes:
  • processor 1102 is further configured to:
  • the second base station 1100 may further include a memory 1104 for storing programs and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 1104 may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage.
  • the processor 1102 executes the application stored in the memory to implement the above functions, thereby implementing the cell change method as shown in FIG.
  • the present invention further provides a terminal device for implementing the function of the terminal device in the cell change method as shown in FIG. 4 and FIG. 8.
  • the terminal device 1200 includes: a receiver 1201. The device 1202, the bus 1203, the memory 1204, and the transmitter 1205, wherein
  • the receiver 1201, the processor 1202, the memory 1204, and the transmitter 1205 are connected to each other through a bus 1203.
  • the bus 1203 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (extended industry standard architecture). Referred to as EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • the transmitter 1205 is configured to send a message to the second base station, the network device, and the first base station, where the receiver 1201 is configured to receive the second base station, the network device, and the message sent by the first base station, for example, For example, receiving a second cell change indication message sent by the network device, and the like.
  • the processor is configured to implement a cell change method as shown in FIG. 4, including:
  • each second radio bearer corresponds to one of the at least one second configuration parameter, the network device is a first base station or network control node;
  • the method further includes:
  • the suspended at least one second configuration parameter is restarted.
  • determining the at least one second configuration parameter used by the at least one second radio bearer includes:
  • the at least one second configuration parameter used by the radio bearer, the configuration parameter unchanged indication configured to notify the terminal device to establish the at least one second radio bearer according to the at least one configuration parameter stored in the terminal device.
  • the method further includes:
  • the terminal device Determining, by the terminal device, the third hybrid automatic repeat request (HARQ) information for the first base station, where the third HARQ information includes p third HARQ information units, where p is a natural number greater than or equal to 1;
  • HARQ hybrid automatic repeat request
  • the fourth HARQ information includes p fourth HARQ information units, and the p fourth HARQ information
  • the value of a fourth HARQ information element in the unit is the same as the value of one of the three third HARQ information units, or is based on one of the p third HARQ information units.
  • the value of the third HARQ information element continues to be maintained.
  • the method further includes:
  • the suspended fourth HARQ information is restarted.
  • the terminal device 1200 may further include a memory 1204 for storing programs and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 1204 may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage.
  • the processor 1202 executes the application stored in the memory to implement the above functions, thereby implementing the cell change method as shown in FIG.
  • the cell change in the process of performing cell change by the terminal device, the cell change is to be established with the terminal device to establish at least one second radio bearer.
  • At least one second configuration parameter generated by the second base station is consistent with the at least one first configuration parameter used by the terminal device and the at least one first radio bearer of the existing first base station, that is, each second configuration
  • the value of each of the second information units in the parameter is consistent with any one of the following: the value of the first information element corresponding to the corresponding first configuration parameter is the same, or is based on the corresponding first configuration parameter. The value of the first information element continues to be maintained.
  • Each second configuration parameter corresponds to a second radio bearer
  • each of the first configuration parameters corresponds to a first radio bearer. Because the generated at least one second configuration parameter is consistent with the at least one first configuration parameter, the terminal device does not need each configuration parameter corresponding to the at least one second radio bearer to be established in the cell change process. The configuration is reconfigured, so that the user plane is not disconnected, the traffic of the terminal device is maintained, and the service performance is improved.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can 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, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de changement de cellule aptes à résoudre un problème lié, dans l'état de la technique, au fait que chaque changement de cellule exécuté par un dispositif terminal entraîne la déconnexion d'un plan utilisateur et, partant, une interruption du service du dispositif terminal. Selon le procédé, au moins un second paramètre de configuration généré par une seconde station de base qui doit établir au moins un second support radio avec le dispositif terminal pour un changement de cellule est cohérent avec au moins un premier paramètre de configuration utilisé par le dispositif terminal et au moins un premier support radio d'une première station de base existante puisque le ou les seconds paramètres de configuration générés sont cohérents avec le ou les premiers paramètres de configuration. De cette manière, lors du changement de cellule, le dispositif terminal ne doit pas reconfigurer chaque paramètre de configuration auquel le ou les seconds supports radio devant être établis correspondent. Cela n'entraîne pas la déconnexion du plan utilisateur ni l'interruption du service du dispositif terminal, et améliore la performance du service.
PCT/CN2016/074148 2016-02-19 2016-02-19 Procédé et appareil pour changement de cellule WO2017139976A1 (fr)

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PCT/CN2016/074148 WO2017139976A1 (fr) 2016-02-19 2016-02-19 Procédé et appareil pour changement de cellule

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005018265A1 (fr) * 2003-08-14 2005-02-24 Nokia Corporation Systeme de communication
CN101656914A (zh) * 2008-08-18 2010-02-24 大唐移动通信设备有限公司 多媒体广播多播业务的处理方法和装置
CN103889009A (zh) * 2012-12-21 2014-06-25 华为技术有限公司 切换方法和设备
CN104378793A (zh) * 2013-08-12 2015-02-25 中兴通讯股份有限公司 一种切换方法、主控基站及受控基站

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005018265A1 (fr) * 2003-08-14 2005-02-24 Nokia Corporation Systeme de communication
CN101656914A (zh) * 2008-08-18 2010-02-24 大唐移动通信设备有限公司 多媒体广播多播业务的处理方法和装置
CN103889009A (zh) * 2012-12-21 2014-06-25 华为技术有限公司 切换方法和设备
CN104378793A (zh) * 2013-08-12 2015-02-25 中兴通讯股份有限公司 一种切换方法、主控基站及受控基站

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