CN112788672A - Secondary base station changing method, main base station, secondary base station and terminal - Google Patents

Secondary base station changing method, main base station, secondary base station and terminal Download PDF

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Publication number
CN112788672A
CN112788672A CN201911083417.8A CN201911083417A CN112788672A CN 112788672 A CN112788672 A CN 112788672A CN 201911083417 A CN201911083417 A CN 201911083417A CN 112788672 A CN112788672 A CN 112788672A
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change
base station
candidate target
candidate
triggering condition
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CN112788672B (en
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张大钧
许萌
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

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Abstract

The embodiment of the invention provides a secondary base station changing method, a main base station, a secondary base station and a terminal, wherein the method comprises the following steps: configuring a secondary base station to change SN change triggering conditions; and sending the SN change triggering condition to a main base station (MN) so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition. The embodiment of the invention avoids the interruption time delay in the SN change process.

Description

Secondary base station changing method, main base station, secondary base station and terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a secondary base station changing method, a primary base station, a secondary base station, and a terminal.
Background
With the continuous evolution of networks, the inter-node mobility event under the traditional network architecture cannot meet the higher requirement for mobility performance. For example, in a common mobility scenario, when a terminal moves to a position where the signal coverage of two network entities overlap, the network will trigger a mobility event. At this time, the conventional handover procedure adopts the method of interrupting data transmission at the source side first and continuing service transmission after accessing the target base station, thereby causing large data interruption; in the conditional switching process, a trigger condition for conditional switching is generated on the primary base station, and in an operation of conditional secondary base station addition/change, an SN change process initiated by the secondary base station is executed according to the trigger condition generated by the primary base station (Master Node, MN), but this may affect the mobility performance of the system, so that the execution of the SN change cannot be well adapted to a Radio Resource Management (RRM) policy of the SN itself.
In summary, in the prior art, in the case of dual connectivity or multi connectivity, the change of the Secondary base Station (SN) depends on the configuration message of the network to perform the operation, thereby causing unnecessary data interruption delay.
Disclosure of Invention
The embodiment of the invention provides a secondary base station changing method, a main base station, a secondary base station and a terminal, which are used for avoiding data interruption time delay when the secondary base station is changed.
The embodiment of the invention provides a method for changing a secondary base station, which is applied to a source secondary base Station (SN) and comprises the following steps:
configuring a secondary base station to change SN change triggering conditions;
and sending the SN change triggering condition to a main base station (MN) so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition.
The embodiment of the invention provides a method for changing a secondary base station, which is applied to a main base station MN and comprises the following steps:
receiving a trigger condition for changing SN change of a secondary base station sent by a source secondary base station SN;
and sending the SN change triggering condition to a terminal so that the terminal determines whether to execute SN change operation according to the SN change triggering condition.
The embodiment of the invention provides a method for changing a secondary base station, which is applied to a terminal and comprises the following steps:
receiving a secondary base station change SN change triggering condition sent by a main base station MN, wherein the SN change triggering condition is obtained by source SN configuration;
and determining whether to execute SN change operation or not according to the SN change triggering condition.
The embodiment of the invention provides a secondary base station changing device, which is applied to a source secondary base station SN and comprises the following components:
the configuration module is used for configuring a trigger condition for changing SN change by the auxiliary base station;
and the sending module is used for sending the SN change triggering condition to a main base station MN so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition.
The embodiment of the invention provides a secondary base station changing device, which is applied to a main base station MN and comprises the following components:
a receiving module, configured to receive a trigger condition for changing an SN change by a secondary base station sent by a source secondary base station SN;
and the sending module is used for sending the SN change triggering condition to a terminal so that the terminal determines whether to execute the SN change operation according to the SN change triggering condition.
The embodiment of the invention provides a secondary base station changing device, which is applied to a terminal and comprises the following components:
a receiving module, configured to receive a trigger condition for changing an SN change by a secondary base station sent by a primary base station MN, where the trigger condition for changing an SN is obtained by configuring a source SN;
and the determining module is used for determining whether to execute SN change operation according to the SN change triggering condition.
The embodiment of the invention provides a secondary base station, which comprises a memory, a processor and a program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the secondary base station changing method when executing the program.
The embodiment of the invention provides a main base station, which comprises a memory, a processor and a program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the secondary base station changing method when executing the program.
The embodiment of the invention provides a terminal, which comprises a memory, a processor and a program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of the secondary base station changing method when executing the program.
An embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the secondary base station changing method.
According to the secondary base station changing method, the primary base station, the secondary base station and the terminal provided by the embodiment of the invention, the SN change triggering condition is configured by the source SN, the SN change triggering condition is sent to the MN, and the SN change triggering condition is sent to the terminal by the MN, so that the source SN can execute the SN change process initiated by the source SN through the SN change triggering condition generated by the source SN, and further, the data interruption delay caused when the SN change process initiated by the SN is executed based on the SN change triggering condition generated by the MN in the prior art is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for secondary base station change applied to a source SN according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a change method applied to a secondary base station of an MN in an embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a secondary base station changing method applied to a terminal according to an embodiment of the present invention;
FIG. 4 is an interaction diagram of a first example in an embodiment of the invention;
FIG. 5 is an interaction diagram of a second example in an embodiment of the invention;
fig. 6 is a block diagram of a secondary base station changing apparatus applied to a source SN according to an embodiment of the present invention;
fig. 7 is a block diagram of a secondary base station changing apparatus applied to MN in the embodiment of the present invention;
fig. 8 is a block diagram of a secondary base station changing apparatus applied to a terminal in an embodiment of the present invention;
FIG. 9 is a diagram illustrating the structure of SN according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of MN in the embodiment of the present invention;
fig. 11 is a schematic structural diagram of a terminal in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Currently, only the MN generates a trigger condition for condition switching, and in the operation of conditional SN addition/change, executing an SN change process initiated by an auxiliary node according to the trigger condition generated by the MN will affect the mobility of the system, so that the execution of the SN change cannot be well adapted to the RRM policy of the SN itself.
In view of this, in order to support the conditional SN change mechanism, the embodiment of the present invention allows the source SN to generate a trigger condition of an SN change, where the trigger condition is used as a criterion for the terminal to perform the SN change, so that the SN change process initiated by the SN is executed by the trigger condition generated by the source SN, thereby avoiding a problem that the mobility performance of the system is affected when the SN change process initiated by the secondary node is executed by the trigger condition generated by the MN in the prior art. The present invention will be described in detail with reference to the following examples.
As shown in fig. 1, a flowchart of steps of a secondary base station changing method applied to a source SN in an embodiment of the present invention is shown, where the method includes the following steps:
step 101: and configuring the secondary base station to change the SN change triggering condition.
Specifically, the terminal maintains dual connectivity with the MN and the source SN.
In this step, the source SN may configure the SN change trigger condition itself.
Specifically, the SN change trigger condition may be a signal strength of the target cell. For example, Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), etc., may be a threshold value of a measurement event such as A3/a5/a4 or B1, etc., and the present invention is not limited thereto.
Step 102: and sending the SN change triggering condition to the MN.
In this step, specifically, the source SN may send the SN change trigger condition to the MN, so that the MN can send the SN change trigger condition to the terminal, and the terminal determines whether to execute the SN change operation according to the SN change trigger condition.
In this way, the SN change triggering condition is configured by the source SN, the SN change triggering condition is sent to the MN, and the MN sends the SN change triggering condition to the terminal, so that the source SN can execute the SN change process initiated by the source SN through the SN change triggering condition generated by the source SN, and further, the data interruption delay caused when the SN change process initiated by the SN is executed based on the SN change triggering condition generated by the MN in the prior art is avoided.
In addition, specifically, when the SN change triggering condition is configured, the SN change triggering condition may be configured for different target SN cells; or, configuring the SN change triggering condition for different target carrier frequencies.
That is, the target SN cell may be used as a configuration unit of the SN change triggering condition, so that different SN change triggering conditions may be configured for different target SN cells; the target carrier frequency can also be used as a configuration unit of the SN change triggering condition, so that different SN change triggering conditions can be configured for different target carrier frequencies, and at the moment, based on the fact that a plurality of target SN cells possibly correspond to the same target carrier frequency, the plurality of target SN cells correspond to the same SN change triggering condition.
In addition, specifically, when the SN change triggering condition is configured, at least one SN change triggering condition may be configured for the same target SN cell; or at least one SN change triggering condition is configured for the same target carrier frequency.
That is, one or more SN change triggering conditions may be configured for the same target SN cell, and one or more SN change triggering conditions may be configured for the same target carrier frequency, where the number of SN change triggering conditions configured for each target SN cell or each target carrier frequency is not specifically limited herein.
In addition, further, in this embodiment, when sending the SN change trigger condition to the MN, different sending manners may be defined for whether the SN change procedure initiated by the source SN is an external procedure or an internal procedure of the source SN, which is specifically described herein.
Firstly, when an SN change triggering condition is sent to an MN, sending a first request message to the MN, wherein the first request message carries a candidate target SN list acquired in advance by an active SN and an SN change triggering condition list of the candidate target SN list;
the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
Specifically, the first request message may be an SN change request (SN change requested) message, but is not limited thereto.
In addition, specifically, the source SN may obtain another SN list in advance, that is, may obtain a target SN list that can be used as a candidate for handover, and at this time, the source SN may carry the candidate target SN list obtained in advance and an SN change trigger condition list corresponding to the candidate target SN list in the first message, and send the first message to the MN.
In addition, specifically, the SN change triggering condition list of the candidate target SN list may be an SN triggering condition corresponding to each candidate target SN in the candidate target SN list, and/or an SN change triggering condition corresponding to each candidate SN cell under each candidate target SN.
Of course, it should be noted that the number of the SN triggering conditions corresponding to each candidate target SN or each candidate SN cell is not limited herein, and may be one or more.
Through the method, when the source SN sends the first message to the MN, the MN can acquire the SN change triggering condition aiming at each candidate target SN or each candidate SN cell, so that the external SN change process with other SNs can be realized.
And secondly, when the SN change triggering condition is sent to the MN, sending a second request message to the MN, wherein the second request message carries a candidate target cell list under the active SN, the SN change triggering condition of the candidate target cell in the candidate target cell list and the configuration information of the candidate target cell.
Specifically, the second request message may be an SN Modification request (SN modified request) message, which is not specifically limited herein.
In addition, specifically, based on that there are multiple secondary cells under the source SN, when the source SN needs to initiate an internal SN change (intra-SN change), the source SN may obtain at least one secondary cell other than the currently connected cell under the source SN, that is, obtain a candidate target cell list that can be used as a candidate handover cell, and carry the SN change trigger condition of each candidate target cell in the candidate target cell list and the configuration information of the candidate target cell in the second message, and send the second message to the MN.
Of course, it should be noted that the number of the SN triggering conditions corresponding to each candidate target cell is not limited herein, and may be one or more.
Through the method, when the source SN sends the second message to the MN, the MN can acquire the SN change triggering condition of each candidate target cell under the source SN, so that the internal SN change process under the source SN can be realized.
In addition, after sending a second request message to the MN, a third request message sent by the MN may also be received, where the third request message carries the security key information of the candidate target cell; an acknowledgement message is then sent to the MN indicating that receipt of the security key information is complete. Thereby enabling the security of data transmission to be ensured.
Specifically, the third request message may be an SN modification request message, and a specific form of the third request message is not limited herein.
The SN change triggering condition is sent to the MN by any one of the two modes, so that the SN change process is ensured to be smoothly carried out when the SN source configures the SN change triggering condition.
Further, it should be understood that "each" mentioned in the present embodiment is a description of a candidate target SN, a candidate SN cell, or a candidate target cell, and does not constitute a limitation thereof.
In this way, in this embodiment, the SN change trigger condition is configured by the source SN itself, and the SN change trigger condition is sent to the MN, and the MN sends the SN change trigger condition to the terminal, so that the source SN can execute the SN change process initiated by itself through the SN change trigger condition generated by itself, thereby avoiding data interruption delay when the SN change process initiated by the SN is executed based on the SN change trigger condition generated by the MN in the prior art.
In addition, as shown in fig. 2, a flowchart of a method for changing a secondary base station applied to an MN in an embodiment of the present invention is shown, where the method includes the following steps:
step 201: receiving SN change triggering conditions sent by a source SN;
specifically, the terminal maintains a dual connection operation with the MN and the source SN.
In addition, specifically, the MN may receive the SN change trigger condition sent by the source SN, that is, the SN change trigger condition may be configured by the source SN itself and sent to the MN.
Step 202: and sending the SN change triggering condition to the terminal so that the terminal determines whether to execute the SN change operation according to the SN change triggering condition.
Specifically, after receiving the SN change triggering condition sent by the source SN, the MN may send the SN change triggering condition to the terminal, and then the terminal determines whether to execute the SN change operation according to the SN change triggering condition.
Furthermore, when receiving the SN change trigger condition sent by the source SN, the MN may adopt any one of the following two manners:
firstly, receiving a first request message sent by a source SN, wherein the first request message carries a candidate target SN list acquired by the source SN in advance and an SN change triggering condition list of the candidate target SN list;
the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
Specifically, the specific content of the first request message in this embodiment may refer to the specific description in the embodiment of the source SN side method, and is not described herein again.
In addition, specifically, when receiving the first request message, the MN may perform a saving operation on the candidate target SN list carried in the first request message and the SN change trigger condition list of the candidate target SN list, so that the MN can find the required information from the saved candidate target SN list and the SN change trigger condition list of the candidate target SN list.
Furthermore, it is explained herein that the MN, after receiving the first request message sent by the source SN, may send a fourth request message to the candidate target SNs in the candidate target SN list; then receiving a response message fed back by the candidate target SN according to the fourth request message, wherein the response message carries configuration information of the candidate SN cell under the candidate target SN; and acquiring SN change triggering conditions corresponding to the candidate SN cells from the SN change triggering condition list of the candidate target SN list according to the configuration information of the candidate SN cells.
Specifically, the fourth request message may be an SN addition request (SN addition request) message, and the response message may be an SN addition request Ack message, although the specific forms of the fourth request message and the response message are not limited herein.
In addition, specifically, after the MN sends the fourth request message to each candidate SN, the candidate SN performs admission control, selects a suitable candidate SN cell, and then feeds back a response message to the SN, where of course, the SN response message carries configuration information of the candidate SN cell; at this time, the MN may obtain the SN change trigger condition corresponding to the candidate SN cell from the SN change trigger condition list obtained first through the configuration information of the candidate SN cell carried in the response message.
And secondly, receiving a second request message sent by the source SN, wherein the second request message carries a candidate target cell list under the source SN, SN change triggering conditions of candidate target cells in the candidate target cell list and configuration information of the candidate target cells.
Specifically, the specific content of the second request message in this embodiment may refer to the specific description in the embodiment of the source SN side method, and is not described herein again.
In addition, specifically, when receiving the second request message, the MN may perform a saving operation on the SN change trigger condition of each candidate target cell in the candidate target cell list carried in the second request message and the configuration information of the candidate target cell, so that the MN can search for required information from the saved SN change trigger condition of each candidate target cell and the configuration information of the candidate target cell.
In addition, it should be noted herein that after receiving the second request message sent by the source SN, the MN may send a third request message to the source SN, where the third request message carries security key information of the candidate target cell; and then receiving a first confirmation message which is sent by the source SN and indicates that the security key information is received.
Specifically, the specific content of the third request message in this embodiment may refer to the specific description in the embodiment of the source SN side method, and is not described herein again.
In this way, receiving the SN change trigger condition sent by the source SN by any one of the two manners ensures smooth SN change process when the source SN configures the SN change trigger condition.
In addition, further, in this embodiment, after receiving a response message fed back by the candidate target SN or receiving a second request message sent by the source SN, a Radio Resource Control (RRC) reconfiguration message may also be sent to the terminal, where the RRC reconfiguration message carries the configuration information of the candidate SN cell and the SN change trigger condition corresponding to the candidate SN cell, or carries the configuration information of the candidate target cell and the SN change trigger condition corresponding to the candidate SN cell.
That is, the SN may combine the configuration information of the candidate SN cells obtained first and the SN change triggering condition corresponding thereto into one RRC reconfiguration message, that is, the configuration information of the candidate SN cells and the SN change triggering condition corresponding thereto carried in the RRC reconfiguration message at this time, and send the RRC reconfiguration message to the terminal, so that the terminal can know the SN change triggering condition corresponding to each candidate SN cell;
of course, the SN may also combine the configuration information of the candidate target cell under the source SN and the SN change trigger condition corresponding thereto, which are acquired first, into one RRC reconfiguration message, that is, the configuration information of the candidate target cell and the SN change trigger condition corresponding thereto, which are carried in the RRC reconfiguration message at this time, and send the RRC reconfiguration message to the terminal, so that the terminal can know the SN change trigger condition corresponding to each candidate target cell under the source SN.
In addition, specifically, the MN may send the RRC reconfiguration message to the terminal through a signaling radio bearer (SRB 1).
Of course, it should be noted herein that the MN may also receive an RRC reconfiguration complete message fed back by the terminal to determine that the terminal has successfully received the RRC reconfiguration message.
In addition, after sending the RRC reconfiguration message to the terminal, the RRC message sent by the terminal after performing the SN change operation may be received, where the RRC message carries indication information indicating that the SN configuration is successful and identification information of the target SN after the SN configuration is changed; a second acknowledgement message indicating successful configuration is then sent to the target SN. Thereby enabling access procedures between the terminal and the target SN.
It should be noted that the target SN may be a candidate target SN or a source SN, that is, when the changed cell is a candidate SN cell, the target SN is a candidate target SN other than the source SN, and when the changed cell is a candidate target cell under the source SN, the target SN is the source SN.
Further, it should be understood that "each" mentioned in the present embodiment is a description of a candidate target SN, a candidate SN cell, or a candidate target cell, that is, a description of the embodiment, and does not constitute a limitation thereof.
In this way, in this embodiment, by receiving the SN change trigger condition sent by the source SN, and sending the SN change trigger condition to the terminal, the terminal determines whether to execute the SN change operation according to the SN change trigger condition, so that the source SN configures the SN change trigger condition by itself, and thus the source SN can execute the SN change process initiated by itself through the SN change trigger condition generated by itself, and further, data interruption delay in the prior art when the SN change process initiated by SN is executed based on the SN change trigger condition generated by the MN is avoided.
Further, as shown in fig. 3, a flowchart of the steps of a secondary base station changing method applied to a terminal is provided, which includes the steps of:
step 301: receiving SN change triggering conditions sent by the MN.
Specifically, the terminal maintains a dual connection operation with the MN and the source SN.
In this step, the terminal receives an SN change trigger condition sent by the MN, where the SN change trigger condition is configured by the source SN.
Specifically, when receiving the SN change trigger condition sent by the MN, the terminal may receive an RRC reconfiguration message sent by the MN, where the RRC reconfiguration message carries configuration information of a candidate SN cell and a SN change trigger condition corresponding to the candidate SN cell, or carries configuration information of a candidate target cell and a SN change trigger condition corresponding to the candidate target cell; the candidate SN cell is a cell under a candidate target SN, and the candidate target cell is a cell under a source SN.
It should be noted that, for a specific description of the RRC reconfiguration message, reference may be made to the description of the RRC reconfiguration message in the MN side method embodiment, and details are not described herein again.
Of course, the terminal may feed back the RRC reconfiguration complete message to the MN after receiving the RRC reconfiguration message.
Step 302: and determining whether to execute the SN change operation or not according to the SN change triggering condition.
In this step, specifically, after receiving the SN change trigger condition sent by the MN, the terminal may determine whether to execute the SN change operation based on the SN change trigger condition.
Specifically, when determining whether to execute the SN change operation according to the SN change trigger condition, the terminal may determine, as the target SN, the SN corresponding to the candidate SN cell or the candidate target cell and execute the SN change operation when determining that the candidate SN cell or the candidate target cell satisfies the corresponding SN change trigger condition.
And after executing the SN change operation, sending an RRC message to the MN, wherein the RRC message carries indication information indicating successful SN configuration and identification information of the target SN after change, so that the MN can send a confirmation message indicating successful configuration to the target SN according to the RRC message, and further complete the access process between the terminal and the target SN.
Thus, in this embodiment, the terminal receives a change trigger condition configured by the source SN and sent by the MN, and determines whether to execute an SN change operation according to the SN change trigger condition, thereby implementing that the source SN configures the SN change trigger condition by itself, so that the source SN can execute an SN change process initiated by itself through the SN change trigger condition generated by itself, and further avoiding data interruption delay when executing the SN change process initiated by SN based on the SN change trigger condition generated by the MN in the prior art.
The above embodiments are explained below by specific examples.
Example one, as shown in fig. 4, a SN change procedure initiated for a source SN:
wherein, the terminal keeps double connection operation with the MN and the source SN;
at this time, the source SN may send a SN change required message to the MN, where the SN change required message carries the candidate target SN list and the SN change trigger condition list of the candidate target SN list, and of course, the SN change trigger condition list includes the SN change trigger condition of each candidate target SN and/or the SN change trigger condition of each candidate SN cell under the candidate target SN.
Then, the MN stores a candidate target SN list carried in the SN change required message and an SN change trigger condition list of the candidate target SN list, and sends an SN addition request message to the candidate target SN;
then, the candidate target SN executes admission control, selects a proper candidate SN district and returns an SN addition request Ack message, and certainly the SN addition request Ack carries the configuration information of the candidate SN district;
then, the MN searches the corresponding SN change condition according to the received configuration information from the candidate target SN, combines the candidate SN cell and the SN change trigger condition corresponding to the candidate SN cell into a new RRC reconfiguration message, and sends the RRC reconfiguration message to the terminal through the SRB of the MN;
then, the terminal feeds back RRC reconfiguration completion information to the MN;
at this time, when the terminal determines that the candidate SN cell satisfies the SN change condition according to the received SN change condition, the terminal executes the SN change operation and sends an RRC message to the MN, where the RRC message carries indication information indicating that the SN configuration is successful and identification information of the target SN after the change, and the target SN is, of course, the candidate target SN corresponding to the SN change condition satisfied by the terminal.
Then, MN sends confirmation message indicating successful configuration to target SN, and the access process is completed between terminal and target SN.
Example two, as shown in fig. 5, an internal SN change procedure initiated for a source SN:
wherein, the terminal keeps double connection operation with the MN and the source SN;
at this time, the source SN may send an SN Modification required message to the MN, where the SN Modification required message carries a candidate target cell list under the source SN, an SN change trigger condition of each candidate target cell in the candidate target cell list, and configuration information of the candidate target cell.
Then, the MN stores a candidate target cell list carried by the SN Modification required message, SN change triggering conditions of each candidate target cell in the candidate target cell list and configuration information of the candidate target cells;
then, the MN sends an SN modification request message to the source SN, wherein the SN modification request message carries security key information of the security key information of each candidate target cell;
then, the source SN returns a confirmation message indicating that the safety key information is received;
then, the MN combines the configuration information of the candidate target cell and the SN change triggering condition corresponding to the candidate target cell into a new RRC reconfiguration message, and sends the RRC reconfiguration message to the terminal through the SRB1 of the MN;
it should be noted that, when the candidate target cell does not need to update the security key information, the step of sending the SN modification request message to the source SN by the MN, that is, the step of sending the security key information, may be omitted, and the step of sending the RRC reconfiguration message to the terminal may be directly entered; in addition, the MN can also send the RRC reconfiguration message to the terminal after sending the SN modification request message to the source SN, without waiting for receiving an acknowledgement message indicating that the security key information reception is completed from the source SN, so as to save SN change time.
Then, the terminal feeds back RRC reconfiguration completion information to the MN;
at this time, when the terminal determines that the candidate target cell meets the SN change condition according to the received SN change condition, the terminal executes the SN change operation and sends an RRC message to the MN, where the RRC message carries indication information indicating that the SN configuration is successful and identification information of the target SN after the change, and the target SN is, of course, the source SN, that is, the internal change of the SN.
Then, MN sends confirmation message indicating successful configuration to target SN, and the access process is completed between terminal and target SN.
In this way, in this embodiment, the SN change triggering condition is obtained through the source SN configuration, so that the execution of the SN change can be well adapted to the RRM policy of the SN itself.
As shown in fig. 6, a block diagram of a secondary base station changing apparatus applied to a source SN according to an embodiment of the present invention is shown, where the apparatus includes:
a configuration module 601, configured to configure a secondary base station to change an SN change trigger condition;
a sending module 602, configured to send the SN change trigger condition to a primary base station MN, so that the MN sends the SN change trigger condition to a terminal, and the terminal determines whether to execute an SN change operation according to the SN change trigger condition.
Optionally, the configuring module 601 is configured to configure the SN change triggering condition for different target SN cells; or, configuring the SN change triggering condition for different target carrier frequencies.
Optionally, the configuring module 601 is configured to configure at least one SN change triggering condition for the same target SN cell; or, configuring at least one SN change triggering condition for the same target carrier frequency.
It should be noted that the apparatus in this embodiment can implement all the method steps in the source SN side method embodiment and achieve the same technical effects, and details of the same parts and the same technical effects in this embodiment as in the source SN side method embodiment are not repeated herein.
Further, as shown in fig. 7, a block diagram of a secondary base station changing apparatus applied to an MN in the embodiment of the present invention is shown, and the apparatus includes:
a receiving module 701, configured to receive a trigger condition for changing an SN change by a secondary base station sent by a source secondary base station SN;
a sending module 702, configured to send the SN change triggering condition to a terminal, so that the terminal determines whether to execute an SN change operation according to the SN change triggering condition.
It should be noted that the apparatus in this embodiment can implement all the method steps in the MN side method embodiment described above, and can achieve the same technical effect, and the description of the same parts and the same technical effects in this embodiment as in the MN side method embodiment is omitted here.
As shown in fig. 8, a block diagram of an apparatus for changing a secondary base station applied to a terminal according to an embodiment of the present invention is shown, and the apparatus includes:
a receiving module 801, configured to receive a trigger condition for changing an SN change by a secondary base station sent by a primary base station MN, where the trigger condition for changing an SN is obtained by configuring a source SN;
a determining module 802, configured to determine whether to execute an SN change operation according to the SN change triggering condition.
It should be noted that the apparatus in this embodiment can implement all the method steps in the terminal-side method embodiment described above, and can achieve the same technical effects, and the description of the same parts and the same technical effects in this embodiment as in the terminal-side method embodiment is omitted here.
In addition, as shown in fig. 9, an entity structure diagram of a secondary base station provided in the embodiment of the present invention is shown, where the secondary base station may include: a processor (processor)910, a communication Interface (Communications Interface)920, a memory (memory)930, and a communication bus 940, wherein the processor 910, the communication Interface 920, and the memory 930 communicate with each other via the communication bus 940. The processor 910 may invoke a computer program stored on the memory 930 and executable on the processor 910 to perform the steps of:
configuring a secondary base station to change SN change triggering conditions; and sending the SN change triggering condition to a main base station (MN) so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition.
Optionally, the configuring the secondary base station to change the SN change triggering condition includes: configuring the SN change triggering conditions aiming at different target SN cells; or, configuring the SN change triggering condition for different target carrier frequencies.
Optionally, the configuring the secondary base station to change the SN change triggering condition includes: configuring at least one SN change triggering condition for the same target SN cell; or, configuring at least one SN change triggering condition for the same target carrier frequency.
Optionally, the sending the SN change trigger condition to the master base station MN includes: sending a first request message to the MN, wherein the first request message carries a candidate target SN list acquired by a source SN in advance and an SN change triggering condition list of the candidate target SN list; the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
Optionally, the sending the SN change trigger condition to the master base station MN includes: and sending a second request message to the MN, wherein the second request message carries a candidate target cell list under an active SN, SN change triggering conditions of candidate target cells in the candidate target cell list and configuration information of the candidate target cells.
Optionally, after sending the second request message to the MN, the processor executes the program to further implement the following steps: receiving a third request message sent by the MN, wherein the third request message carries security key information of the candidate target cell; and sending a confirmation message indicating that the security key information reception is completed to the MN.
It should be noted that the secondary base station in this embodiment can implement all the method steps in the source SN side method embodiment and achieve the same technical effects, and details of the same parts and the same technical effects in this embodiment as in the source SN side method embodiment are not repeated herein.
Furthermore, the logic instructions in the memory 930 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, as shown in fig. 10, an entity structure diagram of a master base station provided in the embodiment of the present invention is shown, where the master base station may include: a processor (processor)1010, a communication Interface (Communications Interface)1020, a memory (memory)1030, and a communication bus 1040, wherein the processor 1010, the communication Interface 1020, and the memory 1030 communicate with each other via the communication bus 1040. Processor 1010 may invoke a computer program stored on memory 1030 and executable on processor 1010 to perform the following steps:
receiving a trigger condition for changing SN change of a secondary base station sent by a source secondary base station SN; and sending the SN change triggering condition to a terminal so that the terminal determines whether to execute SN change operation according to the SN change triggering condition.
It should be noted that the main base station in this embodiment can implement all the method steps in the MN side method embodiment described above, and can achieve the same technical effect, and the description of the same parts and the same technical effects in this embodiment as in the MN side method embodiment is omitted here.
Furthermore, the logic instructions in the memory 1030 can be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, as shown in fig. 11, an entity structure diagram of a terminal provided in the embodiment of the present invention is shown, where the terminal may include: a processor (processor)1110, a communication Interface (Communications Interface)1120, a memory (memory)1130, and a communication bus 1140, wherein the processor 1110, the communication Interface 1120, and the memory 1130 communicate with each other via the communication bus 1140. The processor 1110 may invoke a computer program stored on the memory 1130 and executable on the processor 1110 to perform the steps of:
receiving a secondary base station change SN change triggering condition sent by a main base station MN, wherein the SN change triggering condition is obtained by source SN configuration; and determining whether to execute SN change operation or not according to the SN change triggering condition.
It should be noted that the terminal in this embodiment can implement all the method steps in the terminal side method embodiment and achieve the same technical effects, and the description of the same parts and the same technical effects in this embodiment as in the terminal side method embodiment is omitted here.
In addition, the logic instructions in the memory 1130 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program is implemented to perform the methods provided by the above embodiments when executed by a processor.
It should be noted that, the non-transitory computer readable storage medium in this embodiment can implement all the method steps in the above-mentioned side method embodiments, and can achieve the same technical effects, and the description of the same parts and the same technical effects in this embodiment as in each side method embodiment is omitted here.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (38)

1. A method for changing a secondary base station is applied to a source secondary base Station (SN), and is characterized by comprising the following steps:
configuring a secondary base station to change SN change triggering conditions;
and sending the SN change triggering condition to a main base station (MN) so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition.
2. The method of claim 1, wherein the configuring the trigger condition for changing the SN change comprises:
configuring the SN change triggering conditions aiming at different target SN cells; or,
and configuring the SN change triggering condition aiming at different target carrier frequencies.
3. The method of claim 1, wherein the configuring the trigger condition for changing the SN change comprises:
configuring at least one SN change triggering condition for the same target SN cell; or,
and configuring at least one SN change triggering condition for the same target carrier frequency.
4. The method of claim 1, wherein the sending the SN change trigger condition to a master base station MN comprises:
sending a first request message to the MN, wherein the first request message carries a candidate target SN list acquired by a source SN in advance and an SN change triggering condition list of the candidate target SN list;
the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
5. The method of claim 1, wherein the sending the SN change trigger condition to a master base station MN comprises:
and sending a second request message to the MN, wherein the second request message carries a candidate target cell list under an active SN, SN change triggering conditions of candidate target cells in the candidate target cell list and configuration information of the candidate target cells.
6. The method of claim 5, wherein after sending the second request message to the MN, the method further comprises:
receiving a third request message sent by the MN, wherein the third request message carries security key information of the candidate target cell;
and sending a confirmation message indicating that the security key information reception is completed to the MN.
7. A method for changing a secondary base station is applied to a main base station MN and is characterized by comprising the following steps:
receiving a trigger condition for changing SN change of a secondary base station sent by a source secondary base station SN;
and sending the SN change triggering condition to a terminal so that the terminal determines whether to execute SN change operation according to the SN change triggering condition.
8. The method of claim 7, wherein the receiving the trigger condition for changing the SN change by the secondary base station sent by the source secondary base station SN comprises:
receiving a first request message sent by a source SN, wherein the first request message carries a candidate target SN list acquired by the source SN in advance and an SN change triggering condition list of the candidate target SN list;
the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
9. The method of claim 8, wherein after receiving the first request message sent by the source SN, the method further comprises:
sending a fourth request message to the candidate target SN in the candidate target SN list;
receiving a response message fed back by the candidate target SN according to the fourth request message, wherein the response message carries configuration information of the candidate SN cell under the candidate target SN;
and acquiring SN change triggering conditions corresponding to the candidate SN cells from the SN change triggering condition list of the candidate target SN list according to the configuration information of the candidate SN cells.
10. The method of claim 7, wherein the receiving the trigger condition for changing the SN change by the secondary base station sent by the source secondary base station SN comprises:
receiving a second request message sent by a source SN, wherein the second request message carries a candidate target cell list under the source SN, SN change triggering conditions of candidate target cells in the candidate target cell list, and configuration information of the candidate target cells.
11. The method of claim 10, wherein after receiving the second request message sent by the source SN, the method further comprises:
sending a third request message to the source SN, wherein the third request message carries the security key information of the candidate target cell;
and receiving a first confirmation message which is sent by the source SN and indicates that the security key information is received.
12. The secondary base station changing method according to claim 9 or 10, further comprising:
and sending a Radio Resource Control (RRC) reconfiguration message to the terminal, wherein the RRC reconfiguration message carries the configuration information of the candidate SN cell and the SN change triggering condition corresponding to the configuration information, or carries the configuration information of the candidate target cell and the SN change triggering condition corresponding to the configuration information.
13. The method of claim 12, wherein after the sending the RRC reconfiguration message to the terminal, the method further comprises:
receiving an RRC message sent by the terminal after executing SN change operation, wherein the RRC message carries indication information indicating successful SN configuration and identification information of a changed target SN;
and sending a second confirmation message indicating successful configuration to the target SN.
14. A method for changing a secondary base station is applied to a terminal, and is characterized by comprising the following steps:
receiving a secondary base station change SN change triggering condition sent by a main base station MN, wherein the SN change triggering condition is obtained by source SN configuration;
and determining whether to execute SN change operation or not according to the SN change triggering condition.
15. The method as claimed in claim 14, wherein the receiving the trigger condition for changing the SN change by the secondary base station from the master base station MN includes:
receiving a Radio Resource Control (RRC) reconfiguration message sent by the MN, wherein the RRC reconfiguration message carries configuration information of a candidate SN cell and a SN change triggering condition corresponding to the configuration information, or carries configuration information of a candidate target cell and a SN change triggering condition corresponding to the configuration information;
the candidate SN cell is a cell under a candidate target SN, and the candidate target cell is a cell under a source SN.
16. The method of claim 15, wherein the determining whether to perform the SN change operation according to the SN change triggering condition comprises:
and when determining that the candidate SN cell or the candidate target cell meets the corresponding SN change triggering condition, determining the SN corresponding to the candidate SN cell or the candidate target cell as a target SN, and executing SN change operation.
17. The method of changing a secondary base station as claimed in claim 16, wherein after the performing the SN change operation, the method further comprises:
and sending an RRC message to the MN, wherein the RRC message carries indication information indicating successful SN configuration and identification information of the changed target SN.
18. A secondary base station changing apparatus applied to a source secondary base Station (SN), comprising:
the configuration module is used for configuring a trigger condition for changing SN change by the auxiliary base station;
and the sending module is used for sending the SN change triggering condition to a main base station MN so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition.
19. A secondary base station changing apparatus applied to a primary base station MN, comprising:
a receiving module, configured to receive a trigger condition for changing an SN change by a secondary base station sent by a source secondary base station SN;
and the sending module is used for sending the SN change triggering condition to a terminal so that the terminal determines whether to execute the SN change operation according to the SN change triggering condition.
20. A secondary base station changing apparatus applied to a terminal, comprising:
a receiving module, configured to receive a trigger condition for changing an SN change by a secondary base station sent by a primary base station MN, where the trigger condition for changing an SN is obtained by configuring a source SN;
and the determining module is used for determining whether to execute SN change operation according to the SN change triggering condition.
21. A secondary base station comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:
configuring a secondary base station to change SN change triggering conditions;
and sending the SN change triggering condition to a main base station (MN) so that the MN sends the SN change triggering condition to a terminal, and the terminal determines whether to execute SN change operation according to the SN change triggering condition.
22. The secondary base station of claim 21, wherein the configuring the secondary base station to change the SN change triggering condition comprises:
configuring the SN change triggering conditions aiming at different target SN cells; or,
and configuring the SN change triggering condition aiming at different target carrier frequencies.
23. The secondary base station of claim 21, wherein the configuring the secondary base station to change the SN change triggering condition comprises:
configuring at least one SN change triggering condition for the same target SN cell; or,
and configuring at least one SN change triggering condition for the same target carrier frequency.
24. The secondary base station of claim 21, wherein the sending the SN change trigger condition to a primary base station MN comprises:
sending a first request message to the MN, wherein the first request message carries a candidate target SN list acquired by a source SN in advance and an SN change triggering condition list of the candidate target SN list;
the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
25. The secondary base station of claim 21, wherein the sending the SN change trigger condition to a primary base station MN comprises:
and sending a second request message to the MN, wherein the second request message carries a candidate target cell list under an active SN, SN change triggering conditions of candidate target cells in the candidate target cell list and configuration information of the candidate target cells.
26. The secondary base station of claim 25, wherein after sending the second request message to the MN, the processor when executing the program further performs the steps of:
receiving a third request message sent by the MN, wherein the third request message carries security key information of the candidate target cell;
and sending a confirmation message indicating that the security key information reception is completed to the MN.
27. A master base station comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:
receiving a trigger condition for changing SN change of a secondary base station sent by a source secondary base station SN;
and sending the SN change triggering condition to a terminal so that the terminal determines whether to execute SN change operation according to the SN change triggering condition.
28. The master base station of claim 27, wherein the receiving a secondary base station change SN change trigger condition sent by a source secondary base station SN comprises:
receiving a first request message sent by a source SN, wherein the first request message carries a candidate target SN list acquired by the source SN in advance and an SN change triggering condition list of the candidate target SN list;
the SN change triggering condition list includes SN change triggering conditions of candidate target SNs and/or SN change triggering conditions of candidate SN cells under the candidate target SNs.
29. The master base station of claim 28, wherein after receiving the first request message sent by the source SN, the processor executes the program to further perform the following steps:
sending a fourth request message to the candidate target SN in the candidate target SN list;
receiving a response message fed back by the candidate target SN according to the fourth request message, wherein the response message carries configuration information of the candidate SN cell under the candidate target SN;
and acquiring SN change triggering conditions corresponding to the candidate SN cells from the SN change triggering condition list of the candidate target SN list according to the configuration information of the candidate SN cells.
30. The master base station of claim 27, wherein the receiving a secondary base station change SN change trigger condition sent by a source secondary base station SN comprises:
receiving a second request message sent by a source SN, wherein the second request message carries a candidate target cell list under the source SN, SN change triggering conditions of candidate target cells in the candidate target cell list, and configuration information of the candidate target cells.
31. The master base station of claim 30, wherein after receiving the second request message sent by the source SN, the processor executes the program to further perform the following steps:
sending a third request message to the source SN, wherein the third request message carries the security key information of the candidate target cell;
and receiving a first confirmation message which is sent by the source SN and indicates that the security key information is received.
32. The master base station according to claim 29 or 30, wherein the processor, when executing the program, further performs the steps of:
and sending a Radio Resource Control (RRC) reconfiguration message to the terminal, wherein the RRC reconfiguration message carries the configuration information of the candidate SN cell and the SN change triggering condition corresponding to the configuration information, or carries the configuration information of the candidate target cell and the SN change triggering condition corresponding to the configuration information.
33. The master base station of claim 32, wherein after the sending of the RRC reconfiguration message to the terminal, the processor further implements the following steps when executing the program:
receiving an RRC message sent by the terminal after executing SN change operation, wherein the RRC message carries indication information indicating successful SN configuration and identification information of a changed target SN;
and sending a second confirmation message indicating successful configuration to the target SN.
34. A terminal comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:
receiving a secondary base station change SN change triggering condition sent by a main base station MN, wherein the SN change triggering condition is obtained by source SN configuration;
and determining whether to execute SN change operation or not according to the SN change triggering condition.
35. The terminal of claim 34, wherein the receiving the trigger condition for the change of SN change by the secondary base station sent by the primary base station MN comprises:
receiving a Radio Resource Control (RRC) reconfiguration message sent by the MN, wherein the RRC reconfiguration message carries configuration information of a candidate SN cell and a SN change triggering condition corresponding to the configuration information, or carries configuration information of a candidate target cell and a SN change triggering condition corresponding to the configuration information; the candidate SN cell is a cell under a candidate target SN, and the candidate target cell is a cell under a source SN.
36. The terminal of claim 35, wherein the determining whether to perform an SN change operation according to the SN change triggering condition comprises:
and when determining that the candidate SN cell or the candidate target cell meets the corresponding SN change triggering condition, determining the SN corresponding to the candidate SN cell or the candidate target cell as a target SN, and executing SN change operation.
37. The terminal of claim 36, wherein after the SN change operation is performed, the processor executes the program to further perform the following steps:
and sending an RRC message to the MN, wherein the RRC message carries indication information indicating successful SN configuration and identification information of the changed target SN.
38. A non-transitory computer readable storage medium, having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, is adapted to carry out the steps of the method according to any one of claims 1 to 6, or is adapted to carry out the steps of the method according to any one of claims 7 to 13, or is adapted to carry out the steps of the method according to any one of claims 14 to 17.
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