CN116963195A

CN116963195A - Method for realizing condition switching, electronic equipment and computer readable medium

Info

Publication number: CN116963195A
Application number: CN202210402140.6A
Authority: CN
Inventors: 杜彬; 乾春燕; 杨鹏举
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2023-10-27
Also published as: WO2023197838A1

Abstract

The application provides a method for realizing condition switching, electronic equipment and a computer readable medium, wherein the method for realizing condition switching comprises the following steps: receiving enhanced conditional switching configuration parameters issued by a first base station; wherein the enhanced conditional switching configuration parameters include: the method comprises the steps of a first measurement configuration parameter, a first conditional switching configuration parameter and an auxiliary carrier addition configuration parameter; measuring the neighbor cell according to the first measurement configuration parameter; under the condition that a first adjacent cell meets a first switching condition according to a measurement result and the first measurement configuration parameter, switching to a second base station corresponding to the first adjacent cell according to the first condition switching configuration parameter, and adding an auxiliary carrier according to the auxiliary carrier adding configuration parameter; and sending an enhanced conditional handover reconfiguration complete message to the second base station.

Description

Method for realizing condition switching, electronic equipment and computer readable medium

Technical Field

Embodiments of the present application relate to the field of communications technologies, and in particular, to a method for implementing conditional switching, an electronic device, and a computer readable medium.

Background

With fifth generation mobile communication technology (5 g,5 ^th Generation) has grown up a number of new features and scenarios, where conditional switching (CHO, condition Handover) is a very important function in the new 5G feature. The core idea of conditional switching is: and issuing configuration parameters required by switching and measurement to User Equipment (UE) in advance, wherein the UE autonomously selects a target base station according to a measurement result and executes a switching process. The advantage of this is that the time of signalling interaction in the handover process can be saved, while the problem of handover failure due to radio link condition changes can be avoided. It can be said that the conditional switching effectively improves the robustness of the user switching process.

Although the condition switching is greatly improved in terms of reducing the switching time delay of the main carrier and improving the switching success rate, certain defects are revealed in a complex networking scene. The switching of the use conditions in the networking mode of carrier aggregation (CA, carrier Aggregation) can only reduce the switching time of the primary carrier, but cannot effectively reduce the changing or adding speed of the secondary carrier. Because the flow fluctuation of the user in the switching process has a direct relation with the changing speeds of the main carrier and the auxiliary carrier, the flow fluctuation problem in the switching process can not be effectively improved even if the conditions are used for switching under the CA scene.

Disclosure of Invention

The embodiment of the application provides a method for realizing condition switching, electronic equipment and a computer readable medium.

In a first aspect, an embodiment of the present application provides a method for implementing conditional switching, including: receiving enhanced conditional switching configuration parameters issued by a first base station; wherein the enhanced conditional switching configuration parameters include: the method comprises the steps of a first measurement configuration parameter, a first conditional switching configuration parameter and an auxiliary carrier addition configuration parameter; measuring the neighbor cell according to the first measurement configuration parameter; under the condition that a first adjacent cell meets a first switching condition according to a measurement result and the first measurement configuration parameter, switching to a second base station corresponding to the first adjacent cell according to the first condition switching configuration parameter, and adding an auxiliary carrier according to the auxiliary carrier adding configuration parameter; and sending an enhanced conditional handover reconfiguration complete message to the second base station.

In a second aspect, an embodiment of the present application provides an electronic device, including: at least one processor; and the memory is stored with at least one program, and when the at least one program is executed by the at least one processor, the method for realizing the condition switching is realized.

In a third aspect, an embodiment of the present application provides a computer readable medium having stored thereon a computer program which, when executed by a processor, implements a method for implementing a conditional switch as described in any of the above.

According to the method for realizing the conditional switching, disclosed by the embodiment of the application, the auxiliary carrier is added while the conditional switching is realized, and meanwhile, the switching time delay and the auxiliary carrier adding time delay are reduced, so that the problem of flow fluctuation in the switching process is effectively solved when the conditional switching is used in a CA scene.

Drawings

FIG. 1 is a flow chart of a method for implementing conditional switching according to one embodiment of the present application;

fig. 2 is a schematic view of an application scenario of example 1 according to an embodiment of the present application;

FIG. 3 is an interactive schematic diagram of example 1 implementing conditional switching in accordance with an embodiment of the present application;

fig. 4 is a schematic view of an application scenario of example 2 according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an interaction for implementing conditional switching of example 2 according to an embodiment of the present application;

FIG. 6 is a second interactive schematic diagram for implementing conditional switching in example 2 of an embodiment of the present application;

fig. 7 is a schematic view of an application scenario of example 3 according to an embodiment of the present application;

FIG. 8 is an interactive schematic diagram of implementing conditional switching of example 3 of an embodiment of the present application;

Fig. 9 is a schematic view of an application scenario of example 4 of an embodiment of the present application;

FIG. 10 is a schematic diagram of an interaction for implementing conditional switching of example 4 according to an embodiment of the present application;

FIG. 11 is a second interaction diagram for implementing conditional switching of example 4 according to an embodiment of the present application;

fig. 12 is a schematic view of an application scenario of example 5 of an embodiment of the present application;

FIG. 13 is an interactive schematic diagram of example 5 implementing conditional switching in accordance with an embodiment of the present application;

fig. 14 is a block diagram of an apparatus for implementing conditional switching according to another embodiment of the present application.

Detailed Description

In order to better understand the technical solutions of the present application, the following describes in detail the method for implementing conditional switching, electronic device, and computer readable medium provided by the present application with reference to the accompanying drawings.

Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

The embodiments of the application and features of the embodiments may be combined with each other without conflict.

As used herein, the term "and/or" includes any and all combinations of at least one of the associated listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of at least one other feature, integer, step, operation, element, component, and/or group thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Fig. 1 is a flowchart of a method for implementing conditional switching according to an embodiment of the present application.

In a first aspect, referring to fig. 1, an embodiment of the present application provides a method for implementing conditional switching, which is applied to a terminal, where the terminal in the embodiment of the present application supports a CA adding function, and the terminal may perform the CA adding function, that is, perform secondary carrier addition, on an accessed base station.

The method comprises the following steps:

step 100, receiving enhanced conditional switching configuration parameters issued by a first base station; wherein the enhanced conditional switching configuration parameters include: the method comprises the steps of first measurement configuration parameters, first conditional switching configuration parameters and auxiliary carrier addition configuration parameters.

In some exemplary embodiments, the first base station is a base station supporting CA functions, and the terminal accessed by the first base station may increase the peak traffic of the user by adding a secondary carrier.

In some exemplary embodiments, the cell corresponding to the first base station may be a single carrier cell, and the terminal may not add any secondary carrier when accessing the cell corresponding to the first base station; the cell corresponding to the first base station may also be a CA cell, and the terminal may add the secondary carrier after the cell corresponding to the first base station is accessed. The cell corresponding to the first base station may be the same coverage CA cell or a different coverage CA cell.

In some exemplary embodiments, the first measurement configuration parameter comprises: and characterizing information of a neighbor cell needing to be measured on the main carrier and a first threshold.

In some exemplary embodiments, the first measurement configuration parameter comprises: the method comprises the steps of representing information of a neighbor cell needing to be measured of a main carrier, a first threshold, representing information of a neighbor cell needing to be measured of an auxiliary carrier and a second threshold.

In some exemplary embodiments, the first conditional switch configuration parameter comprises: air interface resource configuration parameters of the target cell and bearing information configuration parameters of the target cell.

In some exemplary embodiments, the secondary carrier addition configuration parameters include: and adding configuration parameters of all auxiliary carriers corresponding to the neighbor cells to be measured. For example, the additional configuration parameters of the secondary carrier include: and the air interface resource configuration parameters of the cells corresponding to the auxiliary carriers and the bearing information configuration parameters of the cells corresponding to the auxiliary carriers.

In some exemplary embodiments, the enhanced conditional switch configuration parameters further comprise: the first secondary carrier deletes the configuration parameters.

In some example embodiments, the first secondary carrier deletion configuration parameters include: the configuration parameters are deleted for all the secondary carriers that have been added. For example, the first secondary carrier deletion configuration parameters include: cell index of all secondary carriers that have been added.

In some exemplary embodiments, when the first measurement configuration parameter is used to measure the primary carrier of the neighboring cell according to a rule in the protocol, the first measurement configuration parameter refers to a condition A3 (condition A3) measurement configuration parameter, the first condition switching configuration parameter corresponding to the condition A3 measurement configuration parameter refers to a condition switching configuration parameter corresponding to the condition A3, the secondary carrier addition configuration parameter corresponding to the condition A3 measurement configuration parameter refers to a configuration parameter of secondary carrier addition corresponding to the condition A3, the first threshold in the condition A3 measurement configuration parameter refers to a threshold of the condition A3, and the first secondary carrier deletion configuration parameter corresponding to the condition A3 refers to a configuration parameter of secondary carrier deletion corresponding to the condition A3.

In some exemplary embodiments, when the first measurement configuration parameter is used to measure the primary carrier and the secondary carrier of the neighboring cell according to the rules in the protocol, the first measurement configuration parameter refers to a condition A3 (condition A3) measurement configuration parameter and a condition A4 (condition A4) measurement configuration parameter, the first conditional switch configuration parameter corresponding to the condition A3 measurement configuration parameter and the condition A4 measurement configuration parameter refers to a conditional switch configuration parameter corresponding to the condition A3 and the condition A4, the secondary carrier addition configuration parameter corresponding to the condition A3 measurement configuration parameter and the condition A4 measurement configuration parameter refers to a configuration parameter added to the secondary carrier corresponding to the condition A3 and the condition A4, the first threshold in the condition A3 measurement configuration parameter refers to a threshold of the condition A3, and the second threshold in the condition A4 measurement configuration parameter refers to a threshold of the condition A4.

In some exemplary embodiments, when the first measurement configuration parameter is used to measure the primary carrier and the secondary carrier of the neighboring cell according to the rules in the protocol, the first measurement configuration parameter refers to a condition A3 (condition A3) measurement configuration parameter and a condition A6 (condition A6) measurement configuration parameter, the first conditional switch configuration parameter corresponding to the condition A3 measurement configuration parameter and the condition A6 measurement configuration parameter refers to a conditional switch configuration parameter corresponding to the condition A3 and the condition A6, the secondary carrier addition configuration parameter corresponding to the condition A3 measurement configuration parameter and the condition A6 measurement configuration parameter refers to a configuration parameter added to the secondary carrier corresponding to the condition A3 and the condition A6, the first threshold in the condition A3 measurement configuration parameter refers to a threshold of the condition A3, and the second threshold in the condition A6 measurement configuration parameter refers to a threshold of the condition A6.

In some exemplary embodiments, the terminal may receive the enhanced conditional access configuration parameters issued by the first base station after the first base station completes the initial access.

And step 101, measuring the neighbor cell according to the first measurement configuration parameter.

In some example embodiments, measuring the neighbor cell according to the first measurement configuration parameter includes: and measuring the main carrier of the neighbor cell corresponding to the information of the neighbor cell of the main carrier to be measured.

In some exemplary embodiments, measuring the primary carrier refers to measuring the received signal strength of the primary carrier.

In some example embodiments, measuring the neighbor cell according to the first measurement configuration parameter includes: measuring a main carrier wave of a neighboring cell corresponding to information of the neighboring cell representing the main carrier wave to be measured; and measuring the auxiliary carrier of the adjacent cell corresponding to the information of the adjacent cell of the auxiliary carrier to be measured.

In some exemplary embodiments, measuring the secondary carrier refers to measuring the received signal strength of the secondary carrier.

Step 102, when the first neighboring cell meets the first switching condition according to the measurement result and the first measurement configuration parameter, switching to a second base station corresponding to the first neighboring cell according to the first condition switching configuration parameter, and adding the auxiliary carrier according to the auxiliary carrier addition configuration parameter.

In some example embodiments, the first neighbor cell is a same coverage carrier aggregation cell, or a different coverage carrier aggregation cell.

Under the condition that the first adjacent cell is the same coverage carrier aggregation cell, the terminal accessed to the first adjacent cell can directly add the auxiliary carrier without carrying out auxiliary carrier measurement.

Under the condition that the first adjacent cell is a different coverage carrier aggregation cell, the terminal accessed to the first adjacent cell cannot directly add the auxiliary carrier, but only adds the auxiliary carrier when the terminal measures that the received signal strength of the auxiliary carrier meets a certain threshold.

In some example embodiments, determining that the first neighbor cell satisfies the first handover condition based on the measurement result and the first measurement configuration parameter comprises: the difference between the received signal strength of the primary carrier of the first neighbor cell and the received signal strength of the primary carrier of the cell corresponding to the first base station satisfies a first threshold.

In some exemplary embodiments, the difference between the received signal strength of the primary carrier of the first neighbor cell and the received signal strength of the primary carrier of the cell corresponding to the first base station satisfying the first threshold comprises: the difference between the received signal strength of the primary carrier of the first neighbor cell and the received signal strength of the primary carrier of the cell corresponding to the first base station is greater than a first threshold.

In some example embodiments, determining that the first neighbor cell satisfies the first handover condition based on the first measurement result and the first measurement configuration parameter comprises: the first time is earlier than the second time;

the first time is the time when the received signal strength of the auxiliary carrier wave of the first adjacent cell meets a second threshold, and the second time is the time when the difference value between the received signal strength of the main carrier wave of the first adjacent cell and the received signal strength of the main carrier wave of the cell corresponding to the first base station meets the first threshold;

or the first time is the time when the difference between the received signal strength of the secondary carrier of the first adjacent cell and the received signal strength of the secondary carrier of the cell corresponding to the first base station meets a second threshold, and the second time is the time when the difference between the received signal strength of the primary carrier of the first adjacent cell and the received signal strength of the primary carrier of the cell corresponding to the first base station meets the first threshold.

In some exemplary embodiments, the received signal strength of the secondary carrier of the first neighbor cell satisfying the second threshold comprises: the received signal strength of the secondary carrier of the first neighbor cell is greater than the second threshold.

In some exemplary embodiments, the difference between the received signal strength of the secondary carrier of the first neighbor cell and the received signal strength of the secondary carrier of the cell to which the first base station corresponds satisfying the second threshold includes: the difference between the received signal strength of the secondary carrier of the first adjacent cell and the received signal strength of the secondary carrier of the cell corresponding to the first base station is greater than a second threshold.

In some example embodiments, performing secondary carrier addition according to the secondary carrier addition configuration parameters includes: and adding the auxiliary carrier according to all the auxiliary carrier addition configuration parameters corresponding to the first neighbor cell.

In some exemplary embodiments, the switching to the second base station corresponding to the first neighboring cell according to the first conditional switching configuration parameter, that is, the switching from the primary carrier of the first base station to the primary carrier of the first neighboring cell is performed according to the first conditional switching configuration parameter.

In some exemplary embodiments, switching to a second base station corresponding to the first neighbor cell according to the first conditional switching configuration parameter includes: changing the bearing information to the bearing information of the first adjacent cell according to the bearing information configuration parameters of the first adjacent cell, adjusting the air interface time sequence to the first adjacent cell according to the measurement result, and updating the air interface resource information to the air interface resource information of the first adjacent cell according to the air interface resource configuration parameters of the first adjacent cell.

In some example embodiments, performing secondary carrier addition according to the secondary carrier addition configuration parameters includes: establishing bearing information for the newly added auxiliary carrier according to the bearing information configuration parameters of the cell corresponding to the auxiliary carrier, distributing air interface resources for the newly added auxiliary carrier according to the air interface resource configuration parameters of the cell corresponding to the auxiliary carrier, and synchronizing the downlink time sequence.

In some exemplary embodiments, in the case that it is determined from the first measurement result and the first measurement configuration parameter that the first neighbor cell satisfies the first handover condition, the method further includes: and deleting the auxiliary carrier according to the first auxiliary carrier deletion configuration parameter.

In some example embodiments, performing secondary carrier deletion according to the first secondary carrier deletion configuration parameter includes: and deleting all the added auxiliary carriers according to the deletion configuration parameters of all the added auxiliary carriers.

In some exemplary embodiments, deleting all secondary carriers that have been added according to the deletion configuration parameters of all secondary carriers that have been added includes: and releasing the bearer and the air interface resources of all the added auxiliary carriers.

In some exemplary embodiments, the second base station is a base station supporting CA functions, and the terminal accessed by the second base station may increase the peak traffic of the user by adding a secondary carrier.

And step 103, sending an enhanced conditional handover reconfiguration complete message to the second base station.

In some exemplary embodiments, the method further includes, after switching to a second base station corresponding to the first neighboring cell according to the first conditional switching configuration parameter and adding the secondary carrier according to the secondary carrier addition configuration parameter, before sending the enhanced conditional switching reconfiguration complete message to the second base station: and sending the first message to the second base station, and receiving the second message returned by the second base station.

In some exemplary embodiments, the first message and the second message are used for timing synchronization between the terminal and the second base station.

In some exemplary embodiments, before the measurement of the neighbor cell according to the first measurement configuration parameter, the method further comprises: receiving a common conditional switching configuration parameter issued by a first base station; the general type conditional switching configuration parameters include: a second measurement configuration parameter, a second conditional switching configuration parameter;

after the neighbor cell is measured according to the first measurement configuration parameter, the method further comprises the following steps: under the condition that the second adjacent cell meets the second switching condition according to the measurement result and the first measurement configuration parameter, switching to a third base station corresponding to the second adjacent cell according to the second condition switching configuration parameter; and sending a normal conditional switching reconfiguration completion message to the third base station.

In some exemplary embodiments, the second measurement configuration parameter comprises: and characterizing information of a neighbor cell needing to be measured on the main carrier and a first threshold.

In some exemplary embodiments, the second conditional switch configuration parameter includes: air interface resource configuration parameters of the target cell and bearing information configuration parameters of the target cell.

In some example embodiments, the second neighbor cell is a same coverage carrier aggregation cell, or a different coverage carrier aggregation cell.

In some example embodiments, determining that the second neighbor cell satisfies the second handover condition according to the measurement result and the first measurement configuration parameter comprises: the first time is later than the second time;

In some exemplary embodiments, the normal conditional switch configuration parameters further include: deleting configuration parameters of the second auxiliary carrier;

before sending the normal conditional handover reconfiguration complete message to the third base station, the method further includes: and deleting the auxiliary carrier according to the second auxiliary carrier deletion configuration parameters.

In some example embodiments, the second secondary carrier deletion configuration parameters include: the configuration parameters are deleted for all the secondary carriers that have been added. For example, the second secondary carrier deletion configuration parameters include: cell index of all secondary carriers that have been added.

In some exemplary embodiments, when the second measurement configuration parameter is used to measure the primary carrier of the neighboring cell according to the rules in the protocol, the second measurement configuration parameter refers to a condition A3 (condition A3) measurement configuration parameter, the first condition switching configuration parameter corresponding to the condition A3 measurement configuration parameter refers to a condition switching configuration parameter corresponding to the condition A3, the first threshold in the condition A3 measurement configuration parameter refers to a threshold of the condition A3, and the second secondary carrier deletion configuration parameter corresponding to the condition A3 measurement configuration parameter refers to a configuration parameter of the secondary carrier deletion corresponding to the condition A3.

In some exemplary embodiments, the third base station is a base station supporting CA functions, and the terminal accessed by the third base station may increase the peak traffic of the user by adding a secondary carrier.

The following is a specific implementation of the method for implementing the conditional switching in the embodiment of the present application in a specific application scenario, and the illustrated examples are only for illustrating specific applications of the method for implementing the conditional switching in the embodiment of the present application in different application scenarios, and are not intended to limit the protection scope of the embodiment of the present application.

Example 1

This example describes an application scenario for handover from a single carrier cell to a co-coverage CA cell.

As shown in fig. 2, in this example, the cell corresponding to the first base station gNB1 to which the terminal accesses is a single carrier cell, no auxiliary carrier is added when the terminal accesses the cell corresponding to the first base station gNB1, the first neighboring cell is a same coverage CA cell, and the terminal accessing the first neighboring cell can directly add the auxiliary carrier without performing auxiliary carrier measurement.

In this example, the terminal moves along the arrow direction after the first base station gNB1 completes initial access, and as the terminal continuously approaches the second base station gNB2, the enhanced conditional switching is triggered, and finally, the switching and the auxiliary carrier addition are completed on the second base station gNB2, as shown in fig. 3, including:

In step 301, the terminal completes initial access at the first base station gNB1, and since the cell corresponding to the first base station gNB1 is a single carrier cell, the terminal only accesses the primary carrier of the cell corresponding to the first base station gNB1 at this time, and does not add any secondary carrier.

Step 302, the terminal receives, after the first base station gNB1 completes initial access, an enhanced conditional access configuration parameter issued by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

a, condition A3 measures configuration parameters;

b, switching configuration parameters corresponding to the condition A3;

and c, adding configuration parameters of the secondary carrier corresponding to the condition A3.

In this example, the condition A3 measurement configuration parameters include: the information of the neighbor cell of the primary carrier and the threshold of the conditionna 3 need to be measured are characterized.

The information characterizing the neighbor cell requiring measurement of the primary carrier includes, for example, information of a cell corresponding to the second base station gNB 2.

In this example, the conditional switch configuration parameters corresponding to the condition A3 include: air interface resource configuration parameters of the target cell and bearing information configuration parameters of the target cell. The target cell includes, for example, a cell corresponding to the second base station gNB 2.

In this example, the configuration parameters of the secondary carrier addition corresponding to the condition A3 include: and adding configuration parameters of all auxiliary carriers corresponding to the neighbor cells to be measured. For example, the additional configuration parameters of the secondary carrier include: and the air interface resource configuration parameters of the cells corresponding to the auxiliary carriers and the bearing information configuration parameters of the cells corresponding to the auxiliary carriers.

Step 303, after receiving the enhanced conditional switching configuration parameter, the terminal measures the received signal strength of the main carrier of the neighboring cell according to the condition A3 measurement configuration parameter.

In this example, the primary carrier of the neighbor cell includes, for example, the primary carrier PCell-2 of the second base station gNB 2.

In step 304, as the terminal continuously moves to the second base station gNB2, the received signal strength of the primary carrier PCell-1 of the first base station gNB1 gradually weakens, the received signal strength of the primary carrier PCell-2 of the second base station gNB2 gradually increases until the difference between the received signal strength of the primary carrier PCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PCell-1 of the first base station gNB1 is greater than the threshold of condition A3 at a certain moment, and the terminal starts to execute enhanced conditional handover.

In step 305, the terminal switches the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional switch configuration parameters corresponding to the condition A3, and adds the secondary carrier of the secondary carrier SCell-2 of the second base station gNB2 according to the configuration parameters corresponding to the conditional na 3.

In this example, the terminal performing the handover from the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional handover configuration parameter corresponding to the condition A3 includes: changing the bearing information to the bearing information of the cell corresponding to the second base station gNB2 according to the bearing information configuration parameter of the cell corresponding to the second base station gNB2, adjusting the air interface time sequence to the cell corresponding to the second base station gNB2 according to the measurement result, and updating the air interface resource information to the air interface resource information of the cell corresponding to the second base station gNB2 according to the air interface resource configuration parameter of the cell corresponding to the second base station gNB 2.

In this example, performing secondary carrier addition of the secondary carrier SCell-2 of the second base station gNB2 according to the configuration parameter of the secondary carrier addition corresponding to the condition A3 includes: establishing bearing information for the newly added auxiliary carrier according to the bearing information configuration parameters of the cell corresponding to the second base station gNB2, distributing air interface resources for the newly added auxiliary carrier according to the air interface resource configuration parameters of the cell corresponding to the second base station gNB2, and synchronizing downlink time sequence. The newly added secondary carrier may be, for example, secondary carrier SCell-2 of the second base station gNB 2.

And step 306, after the terminal finishes switching and adding the auxiliary carrier, replying an enhanced conditional switching reconfiguration completion message to the second base station gNB2, wherein the enhanced conditional switching reconfiguration completion message marks that the terminal successfully executes one-time enhanced conditional switching.

Step 307, after receiving the enhanced conditional switch reconfiguration complete message, the second base station gNB2 recognizes that the terminal successfully performs enhanced conditional switch in the cell, and then completes the whole flow of this enhanced conditional switch after allocating the resources of the primary carrier and the secondary carrier to the terminal.

Example 2

This example describes an application scenario for switching from a single carrier cell to a different overlay CA cell.

As shown in fig. 4, in this example, the cell corresponding to the first base station gNB1 to which the terminal accesses is a single carrier cell, no auxiliary carrier is added when the terminal accesses the cell corresponding to the first base station gNB1, the first neighboring cell is a different coverage CA cell, and the terminal accessing the first neighboring cell cannot directly add the auxiliary carrier, but only adds the auxiliary carrier when the terminal needs to measure that the received signal strength of the auxiliary carrier meets a certain threshold.

In this example, the base station gNB3 is a base station corresponding to a cell carrying the secondary carrier SCell-2, and in general, the terminal cannot directly access the base station gNB3, but can access the base station gNB3 only by adding the secondary carrier.

In this example, the terminal moves along the arrow direction after the first base station gNB1 completes initial access, and as the terminal continuously approaches the second base station gNB2 and the base station gNB3, enhanced condition switching or normal condition switching is triggered, and finally switching and secondary carrier addition are completed on the second base station gNB 2.

These two cases are described below, respectively.

As shown in fig. 5, the enhanced conditional handoff procedure specifically includes:

in step 501, the terminal completes initial access at the first base station gNB1, and since the cell corresponding to the first base station gNB1 is a single carrier cell, the terminal only accesses the primary carrier of the cell corresponding to the first base station gNB1 at this time, and does not add any secondary carrier.

Step 502, the terminal receives, after the first base station gNB1 completes initial access, an enhanced conditional access configuration parameter and a normal conditional access configuration parameter issued by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

a, a condition A3 measurement configuration parameter and a condition nA4 measurement configuration parameter;

b, a condition switching configuration parameter corresponding to the condition A3 and the condition nA 4;

and c, adding configuration parameters of the secondary carriers corresponding to the conditions A3 and the conditions A4.

The general conditional switching configuration parameters at least comprise the following configuration parameters:

a, measuring configuration parameters by a conditional nA 3;

b, a conditional switch configuration parameter corresponding to the conditional na 3.

In this example, the condition A3 measurement configuration parameters include: the method comprises the steps of representing information of a neighbor cell needing to measure a main carrier and a threshold of a condition A3, and measuring configuration parameters by the condition A4, wherein the parameters comprise: and characterizing information of a neighboring cell needing to measure the auxiliary carrier and a second threshold.

The information characterizing the neighbor cell requiring measurement of the primary carrier includes, for example, information of a cell corresponding to the second base station gNB2, and the information characterizing the neighbor cell requiring measurement of the secondary carrier includes, for example, information of a cell corresponding to the base station gNB 3.

In this example, the conditional switching configuration parameters corresponding to the conditions A3 and the conditions na4 include: air interface resource configuration parameters of the target cell and bearing information configuration parameters of the target cell. The target cell includes, for example, a cell corresponding to the second base station gNB 2.

In this example, the configuration parameters of the secondary carrier addition corresponding to the conditions A3 and the conditions na4 include: and adding configuration parameters of all auxiliary carriers corresponding to the neighbor cells to be measured. For example, the additional configuration parameters of the secondary carrier include: and the air interface resource configuration parameters of the cells corresponding to the auxiliary carriers and the bearing information configuration parameters of the cells corresponding to the auxiliary carriers.

Step 503, after receiving the enhanced conditional switching configuration parameter and the normal conditional switching configuration parameter, the terminal measures the received signal strength of the primary carrier of the neighboring cell according to the condition A3 measurement configuration parameter, and measures the received signal strength of the secondary carrier of the neighboring cell according to the condition A4 measurement configuration parameter.

In this example, the primary carrier of the neighbor cell includes, for example, the primary carrier PCell-2 of the second base station gNB2, and the secondary carrier of the neighbor cell includes, for example, the secondary carrier SCell-2 of the base station gNB 3.

Step 504, as the terminal moves to the second base station gNB2 and the base station gNB3 continuously, the received signal strength of the primary carrier PCell-1 of the first base station gNB1 becomes weaker gradually, the received signal strengths of the primary carrier PCell-2 of the second base station gNB2 and the secondary carrier SCell-2 of the base station gNB3 become stronger gradually, until a certain moment satisfies that the first time is earlier than the second time, and the terminal starts to execute enhanced conditional switching; the first time is a threshold that the received signal strength of the secondary carrier SCell-2 of the base station gNB3 is greater than the condition na4, and the second time is a threshold that the difference between the received signal strength of the primary carrier PCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PCell-1 of the first base station gNB1 is greater than the condition A3.

In step 505, the terminal switches the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional switch configuration parameters corresponding to the conditions A3 and the conditions na4, and adds the secondary carrier of the secondary carrier SCell-2 of the base station gNB3 according to the configuration parameters of the secondary carrier addition corresponding to the conditions A3 and the conditions na 4.

In this example, the terminal performing the handover from the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional handover configuration parameters corresponding to the conditions A3 and the conditions na4 includes: changing the bearing information to the bearing information of the cell corresponding to the second base station gNB2 according to the bearing information configuration parameter of the cell corresponding to the second base station gNB2, adjusting the air interface time sequence to the cell corresponding to the second base station gNB2 according to the measurement result, and updating the air interface resource information to the air interface resource information of the cell corresponding to the second base station gNB2 according to the air interface resource configuration parameter of the cell corresponding to the second base station gNB 2.

In this example, performing secondary carrier addition of the secondary carrier SCell-2 of the base station gNB3 according to the configuration parameters of the secondary carrier addition corresponding to the conditions A3 and the conditions na4 includes: establishing bearing information for the newly added auxiliary carrier according to the bearing information configuration parameters of the cell corresponding to the base station gNB3, distributing air interface resources for the newly added auxiliary carrier according to the air interface resource configuration parameters of the cell corresponding to the base station gNB3, and synchronizing the downlink time sequence. The newly added secondary carrier may be, for example, secondary carrier SCell-2 of base station gNB 3.

Step 506, after the terminal completes the handover and the secondary carrier addition, the terminal replies an enhanced conditional handover reconfiguration complete message to the second base station gNB2, where the enhanced conditional handover reconfiguration complete message marks that the terminal successfully executes the enhanced conditional handover once.

In step 507, after receiving the enhanced conditional switching reconfiguration complete message, the second base station gNB2 identifies that the terminal successfully performs enhanced conditional switching in the cell, and then completes all the processes of the enhanced conditional switching after allocating resources of the primary carrier and the secondary carrier to the terminal.

As shown in fig. 6, the general type conditional switching process specifically includes:

in step 601, the terminal completes initial access at the first base station gNB1, and since the cell corresponding to the first base station gNB1 is a single carrier cell, the terminal only accesses the primary carrier of the cell corresponding to the first base station gNB1 at this time, and does not add any secondary carrier.

Step 602, the terminal receives, after the first base station gNB1 completes initial access, an enhanced conditional access configuration parameter and a normal conditional access configuration parameter issued by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

a, measuring configuration parameters by a conditional nA 3;

Step 603, after receiving the enhanced conditional switching configuration parameter and the normal conditional switching configuration parameter, the terminal measures the received signal strength of the primary carrier of the neighboring cell according to the condition A3 measurement configuration parameter, and measures the received signal strength of the secondary carrier of the neighboring cell according to the condition A4 measurement configuration parameter.

Step 604, as the terminal continuously moves to the second base station gNB2 and the base station gNB3, the received signal strength of the primary carrier PCell-1 of the first base station gNB1 becomes gradually weaker, the received signal strengths of the primary carrier PCell-2 of the second base station gNB2 and the secondary carrier SCell-2 of the base station gNB3 become gradually stronger until a certain moment satisfies that the first time is later than the second time, and the terminal starts to execute enhanced conditional switching; the first time is a threshold that the received signal strength of the secondary carrier SCell-2 of the base station gNB3 is greater than the condition na4, and the second time is a threshold that the difference between the received signal strength of the primary carrier PCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PCell-1 of the first base station gNB1 is greater than the condition A3.

In step 605, the terminal performs handover from the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional handover configuration parameter corresponding to the condition A3.

Step 606, after the terminal completes the handover, the terminal replies to the second base station gNB2 with a normal type conditional handover reconfiguration complete message, where the normal type conditional handover reconfiguration complete message marks that the terminal successfully executes a normal type conditional handover once.

In step 607, after receiving the reconfiguration message of the normal condition switch, the second base station gNB2 recognizes that the terminal successfully performs the enhanced condition switch in the cell, and then completes the whole flow of the normal condition switch after allocating the resources of the main carrier to the terminal.

In step 608, since the cell corresponding to the second base station gNB2 is the CA networking cell, when the normal condition handover is completed, the terminal does not add any auxiliary carrier, so the second base station gNB2 continues to send the configuration parameter measured by the conditionna 4 of the auxiliary carrier, so that the terminal monitors the received signal strength of the auxiliary carrier in real time.

In step 609, as the terminal continues to move to the base station gNB3, the received signal strength of the secondary carrier of the base station gNB3 is greater than the threshold of the conditional na4, and the terminal reports the A4 measurement report to the second base station gNB 2.

In step 610, the second base station gNB2 issues an auxiliary carrier addition configuration parameter to the terminal after receiving the A4 measurement report of the terminal, and the terminal adds the auxiliary carrier Scell-2 according to the auxiliary carrier addition configuration parameter and finally completes the auxiliary carrier addition flow.

Example 3

This example describes an application scenario for a handover from one CA cell to another co-coverage CA cell.

As shown in fig. 7, in this example, the cell corresponding to the first base station gNB1 to which the terminal accesses is a CA cell, after the terminal accesses the cell corresponding to the first base station gNB1, the terminal may add an auxiliary carrier, and the first neighboring cell is a CA cell covered by the same, where the terminal accessing the first neighboring cell may directly add the auxiliary carrier without performing auxiliary carrier measurement.

In this example, the terminal moves along the arrow direction after the first base station gNB1 completes initial access, and as the terminal continuously approaches the second base station gNB2, the enhanced conditional switching is triggered, and finally, the switching and the secondary carrier change are completed on the second base station gNB2, as shown in fig. 8, including:

in step 801, the terminal completes initial access at the first base station gNB1, and successfully adds the secondary carrier SCell-1.

Step 802, the terminal receives, after the first base station gNB1 completes initial access, an enhanced conditional access configuration parameter issued by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

a, condition A3 measures configuration parameters;

b, switching configuration parameters corresponding to the condition A3;

c, deleting configuration parameters of the auxiliary carrier corresponding to the condition A3;

d, configuration parameters added by the secondary carrier corresponding to the condition A3.

In this example, the configuration parameters of the secondary carrier deletion corresponding to the condition A3 include: the configuration parameters are deleted for all the secondary carriers that have been added. For example, the first secondary carrier deletion configuration parameters include: cell index of all secondary carriers that have been added.

Step 803, after receiving the enhanced conditional switching configuration parameter, the terminal measures the received signal strength of the main carrier of the neighboring cell according to the condition A3 measurement configuration parameter.

In step 804, as the terminal continuously moves to the second base station gNB2, the received signal strength of the primary carrier PCell-1 of the first base station gNB1 gradually weakens, the received signal strength of the primary carrier PCell-2 of the second base station gNB2 gradually increases until the difference between the received signal strength of the primary carrier PCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PCell-1 of the first base station gNB1 is greater than the threshold of condition A3 at a certain moment, and the terminal starts to execute enhanced conditional handover.

In step 805, the terminal switches the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional switch configuration parameters corresponding to the condition A3, deletes the secondary carrier of the secondary carrier SCell-1 of the first base station gNB1 according to the configuration parameters of the secondary carrier deletion corresponding to the condition A3, and adds the secondary carrier of the secondary carrier SCell-2 of the second base station gNB2 according to the configuration parameters of the secondary carrier addition corresponding to the condition A3.

In this example, performing secondary carrier deletion of the secondary carrier SCell-1 of the first base station gNB1 according to the configuration parameter of the secondary carrier deletion corresponding to the condition A3 includes: and releasing the bearer and the air interface resources of the secondary carrier SCell-1 of the first base station gNB 1.

Step 806, after completing the handover and the secondary carrier change, the terminal replies an enhanced conditional handover reconfiguration complete message to the second base station gNB2, where the enhanced conditional handover reconfiguration complete message marks that the terminal successfully executes the enhanced conditional handover once.

In step 807, after receiving the enhanced conditional switch reconfiguration complete message, the second base station gNB2 recognizes that the terminal successfully performs enhanced conditional switch in the cell, and then completes all the processes of this enhanced conditional switch after allocating the resources of the primary carrier and the secondary carrier to the terminal.

Example 4

This example describes an application scenario for a handover from one CA cell to another, different overlay CA cell.

As shown in fig. 9, in this example, the cell corresponding to the first base station gNB1 to which the terminal accesses is a CA cell, after the terminal accesses the cell corresponding to the first base station gNB1, the auxiliary carrier may be added, the first neighboring cell is a different coverage CA cell, and the terminal accessing the first neighboring cell cannot directly add the auxiliary carrier, but needs the terminal to measure that the received signal strength of the auxiliary carrier satisfies a certain threshold, and then adds the auxiliary carrier.

These two cases are described below, respectively.

As shown in fig. 10, the enhanced conditional handoff procedure specifically includes:

in step 1001, the terminal completes initial access at the first base station gNB1, and successfully adds the secondary carrier SCell-1.

Step 1002, after the first base station gNB1 completes initial access, the terminal receives an enhanced conditional access configuration parameter and a normal conditional access configuration parameter issued by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

a, a condition A3 measures configuration parameters and a condition nA6 measures configuration parameters;

b, a condition switching configuration parameter corresponding to the condition A3 and the condition nA 6;

c, deleting configuration parameters of the auxiliary carrier corresponding to the conditions A3 and the conditions A6;

d, configuration parameters added by secondary carriers corresponding to conditions A3 and conditions nA 6.

a, measuring configuration parameters by a conditional nA 3;

b, a conditional switching configuration parameter corresponding to the conditional na 3;

and c, deleting configuration parameters of the secondary carrier corresponding to the condition A3.

In this example, the condition A3 measurement configuration parameters include: the method for measuring the configuration parameters of the neighbor cell of the primary carrier comprises the following steps of: and characterizing information of a neighboring cell needing to measure the auxiliary carrier and a second threshold.

In this example, the conditional switching configuration parameters corresponding to the conditions A3 and the conditions na6 include: air interface resource configuration parameters of the target cell and bearing information configuration parameters of the target cell. The target cell includes, for example, a cell corresponding to the second base station gNB 2.

In this example, the configuration parameters of the secondary carrier deletion corresponding to the conditions A3 and 6 include: the configuration parameters are deleted for all the secondary carriers that have been added. For example, the first secondary carrier deletion configuration parameters include: cell index of all secondary carriers that have been added.

In this example, the configuration parameters added by CA corresponding to conditions A3 and 6 include: and adding configuration parameters of all auxiliary carriers corresponding to the neighbor cells to be measured. For example, the additional configuration parameters of the secondary carrier include: and the air interface resource configuration parameters of the cells corresponding to the auxiliary carriers and the bearing information configuration parameters of the cells corresponding to the auxiliary carriers.

Step 1003, after receiving the enhanced conditional switching configuration parameter and the normal conditional switching configuration parameter, the terminal measures the received signal strength of the primary carrier of the neighboring cell according to the condition A3 measurement configuration parameter, and measures the received signal strength of the secondary carrier of the neighboring cell according to the condition A6 measurement configuration parameter.

Step 1004, as the terminal continuously moves to the second base station gNB2 and the base station gNB3, the received signal strengths of the primary carrier PCell-1 and the secondary carrier SCell-1 of the first base station gNB1 become weaker gradually, the received signal strengths of the primary carrier PCell-2 of the second base station gNB2 and the secondary carrier SCell-2 of the base station gNB3 become stronger gradually until a certain moment satisfies that the first time is earlier than the second time, and the terminal starts to execute enhanced conditional switching; the difference between the received signal strength of the secondary carrier SCell-2 of the base station gNB3 and the received signal strength of the secondary carrier SCell-1 of the first base station gNB1 is greater than the threshold of the condition a6, and the difference between the received signal strength of the primary carrier PCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PCell-1 of the first base station gNB1 is greater than the threshold of the condition A3.

In step 1005, the terminal switches the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional switch configuration parameters corresponding to the conditions A3 and the conditions na6, deletes the secondary carrier of the secondary carrier SCell-1 of the first base station gNB1 according to the configuration parameters of the secondary carrier deletion corresponding to the conditions A3 and the conditions na6, and adds the secondary carrier of the secondary carrier SCell-2 of the base station gNB3 according to the configuration parameters of the secondary carrier addition corresponding to the conditions A3 and the conditions na 6.

In this example, the terminal performing the handover from the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional handover configuration parameters corresponding to the conditions A3 and 6 includes: changing the bearing information to the bearing information of the cell corresponding to the second base station gNB2 according to the bearing information configuration parameter of the cell corresponding to the second base station gNB2, adjusting the air interface time sequence to the cell corresponding to the second base station gNB2 according to the measurement result, and updating the air interface resource information to the air interface resource information of the cell corresponding to the second base station gNB2 according to the air interface resource configuration parameter of the cell corresponding to the second base station gNB 2.

In this example, performing secondary carrier deletion of the secondary carrier SCell-1 of the first base station gNB1 according to the configuration parameters of the secondary carrier deletion corresponding to the conditions A3 and 6 includes: and releasing the bearer and the air interface resources of the secondary carrier SCell-1 of the first base station gNB 1.

In this example, performing secondary carrier addition of the secondary carrier SCell-2 of the base station gNB3 according to the configuration parameters of the secondary carrier addition corresponding to the conditions A3 and 6 includes: establishing bearing information for the newly added auxiliary carrier according to the bearing information configuration parameters of the cell corresponding to the base station gNB3, distributing air interface resources for the newly added auxiliary carrier according to the air interface resource configuration parameters of the cell corresponding to the base station gNB3, and synchronizing the downlink time sequence. The newly added secondary carrier may be, for example, secondary carrier SCell-2 of base station gNB 3.

In step 1006, after the terminal completes the handover and the secondary carrier change, the terminal replies an enhanced conditional handover reconfiguration complete message to the second base station gNB2, where the enhanced conditional handover reconfiguration complete message marks that the terminal successfully executes the enhanced conditional handover once.

In step 1007, after receiving the enhanced conditional switch reconfiguration complete message, the second base station gNB2 identifies that the terminal successfully performs enhanced conditional switch in the cell, and then completes all the processes of this enhanced conditional switch after allocating resources of the primary carrier and the secondary carrier to the terminal.

As shown in fig. 11, the normal-type conditional switching process specifically includes:

in step 1101, the terminal completes initial access at the first base station gNB1, and successfully adds the secondary carrier SCell-1.

In step 1102, after the first base station gNB1 completes initial access, the terminal receives an enhanced conditional access configuration parameter and a normal conditional access configuration parameter issued by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

and c, adding configuration parameters of the secondary carrier corresponding to the conditions A3 and the conditions A6.

a, measuring configuration parameters by a conditional nA 3;

In this example, the configuration parameters of the secondary carrier addition corresponding to the conditions A3 and 6 include: and adding configuration parameters of all auxiliary carriers corresponding to the neighbor cells to be measured. For example, the additional configuration parameters of the secondary carrier include: and the air interface resource configuration parameters of the cells corresponding to the auxiliary carriers and the bearing information configuration parameters of the cells corresponding to the auxiliary carriers.

In step 1103, after receiving the enhanced conditional access configuration parameter and the normal conditional access configuration parameter, the terminal measures the received signal strength of the primary carrier of the neighboring cell according to the condition A3 measurement configuration parameter, and measures the received signal strength of the secondary carrier of the neighboring cell according to the condition A6 measurement configuration parameter.

Step 1104, as the terminal continuously moves to the second base station gNB2 and the base station gNB3, the received signal strength of the primary carrier PCell-1 of the first base station gNB1 becomes gradually weaker, the received signal strengths of the primary carrier PCell-2 of the second base station gNB2 and the secondary carrier SCell-2 of the base station gNB3 become gradually stronger until a certain moment satisfies that the first time is later than the second time, and the terminal starts to execute enhanced conditional switching; the difference between the received signal strength of the secondary carrier SCell-2 of the base station gNB3 and the received signal strength of the secondary carrier SCell-1 of the first base station gNB1 is greater than the threshold of the condition a6, and the difference between the received signal strength of the primary carrier PCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PCell-1 of the first base station gNB1 is greater than the threshold of the condition A3.

In step 1105, the terminal switches the primary carrier PCell-1 of the first base station gNB1 to the primary carrier PCell-2 of the second base station gNB2 according to the conditional switch configuration parameters corresponding to the condition A3, and deletes the secondary carrier of the secondary carrier SCell-1 of the first base station gNB1 according to the configuration parameters corresponding to the condition A3.

Step 1106, after the terminal completes the handover, the terminal replies to the second base station gNB2 with a normal type conditional handover reconfiguration complete message, where the normal type conditional handover reconfiguration complete message marks that the terminal successfully executes a normal type conditional handover once.

In step 1107, after receiving the reconfiguration message of the normal condition switch, the second base station gNB2 recognizes that the terminal successfully performs the enhanced condition switch in the cell, and then completes the whole flow of the normal condition switch after allocating the resources of the main carrier to the terminal.

In step 1108, since the cell corresponding to the second base station gNB2 is the CA networking cell, when the normal condition handover is completed, the terminal does not add any auxiliary carrier, so the second base station gNB2 continues to send the configuration parameters measured by the conditionna 6 of the auxiliary carrier, so that the terminal monitors the received signal strength of the auxiliary carrier in real time.

In step 1109, as the terminal continues to move to the base station gNB3, the difference between the received signal strength of the secondary carrier of the base station gNB3 and the received signal strength of the secondary carrier SCell-1 of the first base station gNB1 is greater than the threshold of the conditional na6, and the terminal reports an A6 measurement report to the second base station gNB 2.

In step 1110, after receiving the A6 measurement report of the terminal, the second base station gNB2 issues an auxiliary carrier addition configuration parameter to the terminal, and the terminal adds the auxiliary carrier Scell-2 according to the auxiliary carrier addition configuration parameter and finally completes the auxiliary carrier addition procedure.

Example 5

This example describes an application scenario where a Master Node (MN) is unchanged in a Non-independent Networking (NSA) mode and a Secondary Node (SN) is handed over from a single carrier cell to a co-coverage CA cell.

As shown in fig. 12, in this example, an evolved node B (eNB) is an MN in NSA, a first base station gNB1 and a second base station gNB2 are SNs in NSA, a cell corresponding to the first base station gNB1 is a single carrier cell, and a cell corresponding to the second base station gNB2 is a same coverage CA cell.

In this example, after the eNB completes initial access, the terminal completes SN addition at the first base station gNB1, the terminal does not add any auxiliary carrier when accessing the cell corresponding to the first base station gNB1, the first neighboring cell is a co-coverage CA cell, and the terminal accessing the first neighboring cell can directly add the auxiliary carrier without performing auxiliary carrier measurement.

The terminal moves along the arrow direction after the first base station gNB1 completes initial access, and triggers enhanced condition switching along with the terminal continuously approaching to the second base station gNB2, and finally completes switching and auxiliary carrier addition on the second base station gNB2, as shown in fig. 13, specifically including:

in step 1301, the terminal completes initial access at the eNB and successfully adds the first base station gNB1 as SN, and since the cell corresponding to the first base station gNB1 is a single carrier cell, the terminal only accesses the primary carrier of the cell corresponding to the first base station gNB1 at this time, and does not add any secondary carrier.

In step 1302, after completing SN addition by the first base station gNB1, the terminal receives an enhanced conditional access configuration parameter sent by the first base station gNB1, where the enhanced conditional access configuration parameter at least includes the following configuration parameters:

a, condition A3 measures configuration parameters;

b, switching configuration parameters corresponding to the condition A3;

In step 1303, after receiving the enhanced conditional access configuration parameter, the terminal measures the received signal strength of the primary carrier of the neighboring cell according to the condition A3 measurement configuration parameter.

In this example, the primary carriers of the neighbor cell include, for example, primary carrier PSCell-2 of the second base station gNB 2.

In step 1304, as the terminal moves towards the second base station gNB2, the received signal strength of the primary carrier PSCell-1 of the first base station gNB1 gradually weakens, the received signal strength of the primary carrier PSCell-2 of the second base station gNB2 gradually increases until the difference between the received signal strength of the primary carrier PSCell-2 of the second base station gNB2 and the received signal strength of the primary carrier PSCell-1 of the first base station gNB1 is greater than the threshold of condition A3 at a certain moment, and the terminal starts to execute enhanced conditional switching.

In step 1305, the terminal switches the primary carrier PSCell-1 of the first base station gNB1 to the primary carrier PSCell-2 of the second base station gNB2 according to the conditional switch configuration parameters corresponding to the condition A3, and adds the secondary carrier SCell-2 of the second base station gNB2 according to the configuration parameters corresponding to the condition A3.

In this example, the terminal performing switching from the primary carrier PSCell-1 of the first base station gNB1 to the primary carrier PSCell-2 of the second base station gNB2 according to the conditional switching configuration parameter corresponding to the condition A3 includes: changing the bearing information to the bearing information of the cell corresponding to the second base station gNB2 according to the bearing information configuration parameter of the cell corresponding to the second base station gNB2, adjusting the air interface time sequence to the cell corresponding to the second base station gNB2 according to the measurement result, and updating the air interface resource information to the air interface resource information of the cell corresponding to the second base station gNB2 according to the air interface resource configuration parameter of the cell corresponding to the second base station gNB 2.

Step 1306, after completing the handover and the secondary carrier addition, the terminal replies an enhanced conditional handover reconfiguration complete message to the second base station gNB2, where the enhanced conditional handover reconfiguration complete message marks that the terminal successfully executes the enhanced conditional handover once.

In step 1307, after receiving the enhanced conditional switch reconfiguration complete message, the second base station gNB2 recognizes that the terminal successfully performs enhanced conditional switch in the cell, allocates resources of the primary carrier PSCell-2 and the secondary carrier Scell-2 to the terminal, and then completes all the processes of the enhanced conditional switch.

In a second aspect, another embodiment of the present application provides an electronic device, including: at least one processor; and the memory is stored with at least one program, and when the at least one program is executed by the at least one processor, the method for realizing the condition switching is realized.

Wherein the processor is a device having data processing capabilities including, but not limited to, a Central Processing Unit (CPU) or the like; the memory is a device with data storage capability including, but not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically charged erasable programmable read-only memory (EEPROM), FLASH memory (FLASH).

In some embodiments, the processor, the memory, and the other components of the computing device are connected to each other via a bus.

In a third aspect, another embodiment of the present application provides a computer readable medium having stored thereon a computer program which, when executed by a processor, implements a method of implementing a conditional switch of any of the above.

Fourth aspect, referring to fig. 14, another embodiment of the present application provides an apparatus for implementing conditional switching, including: a receiving module 1401, configured to receive an enhanced conditional access configuration parameter issued by a first base station; wherein the enhanced conditional switching configuration parameters include: the method comprises the steps of a first measurement configuration parameter, a first conditional switching configuration parameter and an auxiliary carrier addition configuration parameter; a measurement module 1402, configured to measure a neighboring cell according to the first measurement configuration parameter; a switching module 1403, configured to switch to a second base station corresponding to the first neighboring cell according to the first condition switching configuration parameter and perform secondary carrier addition according to the secondary carrier addition configuration parameter when it is determined that the first neighboring cell meets a first switching condition according to a measurement result and the first measurement configuration parameter; and sending an enhanced conditional handover reconfiguration complete message to the second base station.

The measurement module 1402 is specifically configured to implement the measurement on the neighbor cell according to the first measurement configuration parameter in the following manner: and measuring the main carrier of the neighbor cell corresponding to the information of the neighbor cell, the main carrier of which needs to be measured, of the characterization.

The switching module 1403 is specifically configured to determine that the first neighboring cell meets the first switching condition according to the measurement result and the first measurement configuration parameter by adopting the following manner: and the difference value between the received signal strength of the main carrier of the first adjacent cell and the received signal strength of the main carrier of the cell corresponding to the first base station meets the first threshold.

The measurement module 1402 is specifically configured to implement the measurement on the neighbor cell according to the first measurement configuration parameter in the following manner: measuring the main carrier wave of the adjacent cell corresponding to the information of the adjacent cell of the main carrier wave to be measured; and measuring the secondary carrier of the adjacent cell corresponding to the information of the adjacent cell, the secondary carrier of which needs to be measured, of the characterization.

The switching module 1403 is specifically configured to implement the determining that the first neighboring cell meets the first switching condition according to the first measurement result and the first measurement configuration parameter in the following manner: the first time is earlier than the second time.

The first time is a time when the received signal strength of the secondary carrier of the first neighboring cell meets the second threshold, and the second time is a time when a difference value between the received signal strength of the primary carrier of the first neighboring cell and the received signal strength of the primary carrier of the cell corresponding to the first base station meets the first threshold;

or the first time is a time when a difference between the received signal strength of the secondary carrier of the first neighboring cell and the received signal strength of the secondary carrier of the cell corresponding to the first base station meets the second threshold, and the second time is a time when a difference between the received signal strength of the primary carrier of the first neighboring cell and the received signal strength of the primary carrier of the cell corresponding to the first base station meets the first threshold.

In some exemplary embodiments, the secondary carrier addition configuration parameters include: and adding configuration parameters of all auxiliary carriers corresponding to the neighbor cells to be measured.

The switching module 1403 is specifically configured to implement the adding of the secondary carrier according to the secondary carrier adding configuration parameter in the following manner: and adding the auxiliary carriers according to all the auxiliary carrier addition configuration parameters corresponding to the first neighbor cell.

In some exemplary embodiments, the first neighbor cell is a same coverage carrier aggregation cell, or a different coverage carrier aggregation cell.

In some exemplary embodiments, the enhanced conditional switch configuration parameters further include: the first secondary carrier deletes the configuration parameters.

The switching module 1403 is also for: and under the condition that the first neighbor cell meets the first switching condition according to the first measurement result and the first measurement configuration parameter, performing secondary carrier deletion according to the first secondary carrier deletion configuration parameter.

In some exemplary embodiments, the first secondary carrier deletion configuration parameters include: the configuration parameters are deleted for all the secondary carriers that have been added.

The switching module 1403 is specifically configured to implement the secondary carrier deletion according to the first secondary carrier deletion configuration parameter in the following manner: and deleting all the added auxiliary carriers according to the deletion configuration parameters of all the added auxiliary carriers.

In some exemplary embodiments, the receiving module 1401 is further to: receiving a common conditional switching configuration parameter issued by the first base station; wherein, the general type conditional switching configuration parameters include: the second measurement configuration parameter, the second conditional switch configuration parameter, and the second secondary carrier deletion configuration parameter.

The switching module 1403 is also for: under the condition that a second adjacent cell meets a second switching condition according to a measurement result and the first measurement configuration parameter, switching to a third base station corresponding to the second adjacent cell according to the second condition switching configuration parameter, and deleting the auxiliary carrier according to the second auxiliary carrier deletion configuration parameter; and sending a common conditional switching reconfiguration completion message to the third base station.

The specific implementation process of the device for implementing the condition switching is the same as that of the method for implementing the condition switching in the foregoing embodiment, and will not be repeated here.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, it will be apparent to one skilled in the art that features, characteristics, and/or elements described in connection with a particular embodiment may be used alone or in combination with other embodiments unless explicitly stated otherwise. It will therefore be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present application as set forth in the following claims.

Claims

1. A method of implementing conditional switching, comprising:

receiving enhanced conditional switching configuration parameters issued by a first base station; wherein the enhanced conditional switching configuration parameters include: the method comprises the steps of a first measurement configuration parameter, a first conditional switching configuration parameter and an auxiliary carrier addition configuration parameter;

measuring the neighbor cell according to the first measurement configuration parameter;

under the condition that a first adjacent cell meets a first switching condition according to a measurement result and the first measurement configuration parameter, switching to a second base station corresponding to the first adjacent cell according to the first condition switching configuration parameter, and adding an auxiliary carrier according to the auxiliary carrier adding configuration parameter;

And sending an enhanced conditional handover reconfiguration complete message to the second base station.

2. The method of implementing conditional switching of claim 1, wherein the first measurement configuration parameter comprises: characterizing information of a neighbor cell of a main carrier to be measured and a first threshold;

the measuring the neighbor cell according to the first measurement configuration parameter includes: measuring the main carrier wave of the adjacent cell corresponding to the information of the adjacent cell of the main carrier wave to be measured;

the determining that the first neighbor cell meets the first handover condition according to the measurement result and the first measurement configuration parameter includes: and the difference value between the received signal strength of the main carrier of the first adjacent cell and the received signal strength of the main carrier of the cell corresponding to the first base station meets the first threshold.

3. The method of implementing conditional switching of claim 1, wherein the first measurement configuration parameter comprises: characterizing information of a neighbor cell needing to be measured of a main carrier, a first threshold, information of a neighbor cell needing to be measured of an auxiliary carrier, and a second threshold;

the measuring the neighbor cell according to the first measurement configuration parameter includes: measuring the main carrier wave of the adjacent cell corresponding to the information of the adjacent cell of the main carrier wave to be measured; measuring the secondary carrier of the adjacent cell corresponding to the information of the adjacent cell of the secondary carrier to be measured in the characterization;

The determining that the first neighbor cell meets the first handover condition according to the first measurement result and the first measurement configuration parameter includes: the first time is earlier than the second time;

4. The method for implementing conditional switching according to claim 1, wherein the secondary carrier addition configuration parameters include: adding configuration parameters of all auxiliary carriers corresponding to adjacent cells to be measured;

the adding the auxiliary carrier according to the auxiliary carrier adding configuration parameter comprises the following steps: and adding the auxiliary carriers according to all the auxiliary carrier addition configuration parameters corresponding to the first neighbor cell.

5. The method for implementing conditional handover of claim 1, wherein the first neighbor cell is a same coverage carrier aggregation cell or a different coverage carrier aggregation cell.

6. The method for implementing conditional switching according to any one of claims 1-5, the enhanced conditional switching configuration parameters further comprising: deleting configuration parameters of the first auxiliary carrier;

in the case that the first neighbor cell meets the first handover condition according to the first measurement result and the first measurement configuration parameter, the method further includes: and deleting the auxiliary carrier according to the first auxiliary carrier deletion configuration parameter.

7. The method for implementing conditional switching of claim 6, wherein the first secondary carrier deletion configuration parameter comprises: deleting configuration parameters of all the added auxiliary carriers;

the performing secondary carrier deletion according to the first secondary carrier deletion configuration parameter includes: and deleting all the added auxiliary carriers according to the deletion configuration parameters of all the added auxiliary carriers.

8. The method for implementing conditional handover according to any one of claims 1-5, further comprising, before the measuring the neighbor cell according to the first measurement configuration parameter:

Receiving a common conditional switching configuration parameter issued by the first base station; wherein, the general type conditional switching configuration parameters include: the second measurement configuration parameter, the second conditional switching configuration parameter and the second auxiliary carrier deletion configuration parameter;

after the measuring the neighbor cell according to the first measurement configuration parameter, the method further includes:

under the condition that a second adjacent cell meets a second switching condition according to a measurement result and the first measurement configuration parameter, switching to a third base station corresponding to the second adjacent cell according to the second condition switching configuration parameter, and deleting the auxiliary carrier according to the second auxiliary carrier deletion configuration parameter;

and sending a common conditional switching reconfiguration completion message to the third base station.

9. An electronic device, comprising:

at least one processor;

a memory having at least one program stored thereon, which when executed by the at least one processor, implements the method of implementing conditional switching of any of claims 1-8.

10. A computer readable medium having stored thereon a computer program which, when executed by a processor, implements a method of implementing conditional switching according to any of claims 1-8.