CN115942397A

CN115942397A - Cell switching method, cell switching device, cell configuration method, cell configuration device, computer-readable storage medium, user equipment and network equipment

Info

Publication number: CN115942397A
Application number: CN202110982205.4A
Authority: CN
Inventors: 邓云
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2023-04-07
Also published as: WO2023024385A1

Abstract

A cell switching method, a cell switching configuration device, a computer readable storage medium, user equipment and network equipment are provided, wherein the cell switching method comprises the following steps: acquiring a handover execution condition corresponding to the DAPS handover, wherein the handover execution condition comprises a first condition and a second condition, the first condition indicates requirements for the signal quality of the candidate cell, and the second condition indicates requirements for the signal quality of the serving cell; measuring signal quality of the candidate cell and signal quality of the serving cell; performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition. By the technical scheme of the invention, under the condition of simultaneously configuring conditional handover and DAPS handover, how to realize the cell handover of the UE can be realized.

Description

Cell switching method, cell switching device, cell configuration method, cell configuration device, computer-readable storage medium, user equipment and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a cell switching method, a cell configuration method, a cell switching device, a cell configuration device, a computer readable storage medium, a user equipment, and a network device.

Background

A conditional handover mechanism is introduced in wireless communications. In the conditional handover mechanism, a User Equipment (UE) determines whether a handover execution condition is satisfied, and when the handover execution condition is satisfied, the UE accesses a target cell by using a configuration parameter of a candidate target cell included in a handover command.

A Dual Active Protocol Stack (DAPS) handover has also been introduced in wireless communications. In the conventional handover process, there is always a user plane interruption time, because once the UE receives the handover command, the UE interrupts the communication with the source base station, and then synchronizes to the target cell and executes the random access process, and after the random access is successful, the UE can continue to perform data transmission with the target base station, and there is a certain interruption time in the process. To achieve a handover delay of 0 milliseconds (ms), the newly introduced DAPS handover requires that the UE simultaneously maintain communication with the source base station, as well as with the target base station, during the handover. During this handover, the UE waits until the UE has performed normal communication with the target cell before releasing the connection with the source base station.

However, how to implement the cell handover of the UE is a technical problem to be solved urgently under the condition of configuring the conditional handover and the DAPS handover at the same time.

Disclosure of Invention

The technical problem solved by the invention is how to realize the cell switching of the UE under the condition of simultaneously configuring the conditional switching and the DAPS switching.

To solve the foregoing technical problem, an embodiment of the present invention provides a cell switching method, where the cell switching method includes: acquiring a handover execution condition corresponding to the DAPS handover, wherein the handover execution condition comprises a first condition and a second condition, the first condition indicates requirements for the signal quality of the candidate cell, and the second condition indicates requirements for the signal quality of the serving cell; measuring signal quality of the candidate cell and signal quality of the serving cell; performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

Optionally, the first condition includes a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition includes a measurement event A1.

Optionally, the performing the DAPS handover to the candidate cell includes: performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the measurement event A3 and/or the measurement event A5 and/or the measurement event A4 and the signal quality of the serving cell satisfies the measurement event A1.

Optionally, the first condition includes a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition includes a non-running timer T310.

Optionally, the performing the DAPS handover to the candidate cell includes: performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the measurement event A3 and/or the measurement event A5 and/or the measurement event A4 and the timer T310 is not run for the serving cell.

Optionally, the cell switching method further includes: performing a handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell does not satisfy the second condition.

Optionally, the obtaining of the handover execution condition corresponding to the DAPS handover further includes: a data radio bearer required to perform a DAPS handover is acquired.

Optionally, the performing the DAPS handover to the candidate cell includes: configuring the PDCP entity of the data radio bearer as a PDCP entity for DAPS handover capable of simultaneously processing data from the serving cell and the candidate cell.

In order to solve the above technical problem, an embodiment of the present invention further discloses a handover configuration method, where the handover configuration method includes: configuring a handover execution condition corresponding to a DAPS handover, the handover execution condition comprising a first condition indicating a requirement for signal quality of a candidate cell, or the handover execution condition comprising the first condition and a second condition indicating a requirement for signal quality of a serving cell; and sending the handover execution condition, wherein the handover execution condition is used for executing DAPS handover to the candidate cell when the signal quality of the target candidate cell meets the first condition and the signal quality of the serving cell meets a second condition.

Optionally, the first condition includes a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, the second condition includes a non-running timer T310, and the configuring the handover execution condition corresponding to the DAPS handover includes: the signaling configuring the handover execution condition includes only the first condition.

The embodiment of the invention also discloses a cell switching device, which comprises: an obtaining module, configured to obtain a handover execution condition corresponding to DAPS handover, where the handover execution condition includes a first condition and a second condition, the first condition indicates a requirement for signal quality of a candidate cell, and the second condition indicates a requirement for signal quality of a serving cell; a measurement module for measuring signal quality of the candidate cell and signal quality of the serving cell; a handover module, configured to perform a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

The embodiment of the invention also discloses a switching configuration device, which comprises: a configuration module, configured to configure a handover execution condition corresponding to DAPS handover, where the handover execution condition includes a first condition and a second condition, the first condition indicates a requirement for signal quality of a candidate cell, and the second condition indicates a requirement for signal quality of a serving cell; a sending module, configured to send the handover execution condition, where the handover execution condition is used to execute DAPS handover to a candidate cell when the signal quality of a target candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

The embodiment of the invention also discloses a switching configuration method, which is applied to the candidate target base station and comprises the following steps: receiving a handover request, the handover request indicating a conditional handover request; configuring a first radio resource configuration for non-DAPS handover and a second radio resource configuration for DAPS handover;

transmitting the first radio resource configuration and the second radio resource configuration.

Optionally, the sending the first radio resource configuration and the second radio resource configuration includes: the first radio resource configuration and the second radio resource configuration are sent in two separate signalings, respectively.

Optionally, the two independent signaling are X2/Xn interface signaling or newly added signaling.

Optionally, the sending the first radio resource configuration and the second radio resource configuration includes: sending a handover request acknowledgement, the handover request acknowledgement including the first radio resource configuration and the second radio resource configuration.

Optionally, the handover request acknowledgement includes a first transparent container and a second transparent container, where the first transparent container places the first radio resource configuration, and the second transparent container places the second radio resource configuration.

Optionally, the handover request acknowledgement includes indication information, where the indication information indicates that the second transparent container corresponds to a DAPS handover, or the indication information indicates that the first transparent container corresponds to a non-DAPS handover and the second transparent container corresponds to a DAPS handover.

The embodiment of the invention also discloses another switching configuration method which is used for the source base station and comprises the following steps: sending a handover request, the handover request indicating a conditional handover request; receiving a first radio resource configuration for a non-DAPS handover and a second radio resource configuration for a DAPS handover.

Optionally, the handover configuration method further includes: and respectively determining a conditional handover execution condition and a DAPS handover execution condition according to the first radio resource configuration and the second radio resource configuration.

Optionally, the sending the handover request includes: determining the candidate cell to apply non-DAPS handover according to the network condition of the candidate cell, and/or configuring at least one wireless data bearer as DAPS handover; and carrying first indication information indicating the non-DAPS handover in the handover request, and/or carrying second indication information indicating a radio data bearer requesting to execute the DAPS handover.

The embodiment of the invention also discloses a switching configuration device which is applied to the candidate target base station and comprises the following components: a handover request receiving module, configured to receive a handover request, where the handover request indicates a conditional handover request; a configuration module to configure a first radio resource configuration for a non-DAPS handover and a second radio resource configuration for a DAPS handover;

a resource allocation sending module, configured to send the first radio resource allocation and the second radio resource allocation. The embodiment of the invention also discloses a switching configuration device, which is used for the source base station and comprises the following components: a switching request sending module, configured to send a switching request, where the switching request indicates a conditional switching request; a resource configuration receiving module, configured to receive a first radio resource configuration and a second radio resource configuration, where the first radio resource configuration is for non-DAPS handover, and the second radio resource configuration is for DAPS handover.

The embodiment of the invention also discloses a computer readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the cell switching method or the steps of the switching configuration method are executed.

The embodiment of the invention also discloses user equipment which comprises a memory and a processor, wherein the memory is stored with a computer program which can run on the processor, and the processor executes the steps of the cell switching method when running the computer program.

The embodiment of the invention also discloses network equipment, which comprises a memory and a processor, wherein the memory is stored with a computer program which can run on the processor, and the processor executes the steps of the switching configuration method when running the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the technical scheme of the invention, UE acquires a handover execution condition corresponding to DAPS handover, wherein the handover execution condition comprises a first condition and a second condition, the first condition indicates a requirement for the signal quality of a candidate cell, and the second condition indicates a requirement for the signal quality of a serving cell; measuring signal quality of the candidate cell and signal quality of the serving cell; performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition. In the technical scheme of the invention, the UE can execute the DAPS handover based on the measurement result and the handover execution condition by configuring the first condition and the second condition in the handover execution condition, thereby realizing the cell handover under the condition of simultaneously configuring the conditional handover and the DAPS handover, improving the success rate of the handover and reducing the time delay of the handover interruption. In addition, in the DAPS handover, since the UE needs to maintain communication with the source base station and the target base station at the same time, a first condition needs to be configured to ensure the signal quality of the target cell, and a second condition needs to be configured to ensure the quality of the serving cell, thereby implementing smooth DAPS handover.

Drawings

Fig. 1 is a flowchart of a cell switching method according to an embodiment of the present invention;

fig. 2 is a flowchart of a handover configuration method according to an embodiment of the present invention;

FIG. 3 is an interaction flow diagram according to an embodiment of the invention;

fig. 4 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a switch configuration apparatus according to an embodiment of the present invention;

FIG. 6 is a flow chart of another handover configuration method according to an embodiment of the present invention;

fig. 7 is a flowchart of another handover configuration method according to an embodiment of the present invention.

Detailed Description

As described in the background art, how to implement cell handover of a UE is an urgent technical problem to be solved under the condition of configuring conditional handover and DAPS handover simultaneously.

In the technical scheme of the invention, the UE can execute the DAPS handover based on the measurement result and the handover execution condition by configuring the first condition and the second condition in the handover execution condition, thereby realizing the cell handover under the condition of simultaneously configuring the conditional handover and the DAPS handover, improving the success rate of the handover and reducing the time delay of the handover interruption. In addition, in the DAPS handover, since the UE needs to maintain communication with the source base station and the target base station at the same time, a first condition needs to be configured to ensure the signal quality of the target cell, and a second condition needs to be configured to ensure the quality of the serving cell, thereby implementing smooth DAPS handover.

The technical scheme of the invention can be applied to a 5G (5 Generation) communication system, a 4G communication system, a 3G communication system and various future new communication systems, such as 6G, 7G and the like.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a cell handover method according to an embodiment of the present invention.

The cell handover method shown in fig. 1 may be used on the user equipment side, that is, the user equipment may perform the steps of the method. The user equipment includes but is not limited to a mobile phone, a computer, a tablet computer and other terminal equipment.

Specifically, the cell switching method may include the following steps:

step 101: acquiring a Handover execution condition (Handover execution condition) corresponding to the DAPS Handover, wherein the Handover execution condition comprises a first condition and a second condition, the first condition indicates a requirement for the signal quality of the candidate cell, and the second condition indicates a requirement for the signal quality of the serving cell;

step 102: measuring signal quality of the candidate cell and signal quality of the serving cell;

the

steps

102 and 101 do not have a definite sequence, and the ue may measure the candidate cell and the serving cell all the time, and then obtain the handover execution condition corresponding to the DAPS handover from the network side. The serving cell may be a primary cell accessed by the UE or any one of serving cells in a carrier aggregation state.

Step 103: performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution sequence of the steps.

It is understood that, in an implementation, the cell switching method may be implemented by using a software program running in a processor integrated within a chip or a chip module.

In this embodiment, the UE may obtain the handover execution condition from the handover command. The handover execution condition may be a handover execution condition corresponding to the DAPS handover, and the handover execution condition corresponding to the DAPS handover may include a first condition and a second condition. The first and second conditions are set because the UE is required to maintain connection with both the source base station and the target base station for DAPS handover, and thus the signal quality on both sides cannot be too poor. That is, in addition to the conventional requirement for the signal quality of the candidate cell, the signal quality of the serving cell needs to be set to meet a certain requirement.

Specifically, the UE may further obtain a handover execution condition corresponding to the non-DAPS handover from the handover command. The handover execution condition corresponding to the non-DAPS handover may include only the first condition.

Specifically, the UE may further obtain an identifier of a candidate cell to which the DAPS handover or the non-DAPS handover is directed from the handover command, for example, when the UE establishes Data Radio Bearer (DRB) DRB1, DRB2, and DRB3, and the handover command includes cell1 of the candidate cell, DRB1 is configured as the DAPS handover, and a handover execution condition corresponding to the handover execution condition is referred to as a DAPS handover execution condition, at this time, DRB2 and DRB3 may be configured as the non-DAPS handover; a handover execution condition corresponding to non-DAPS handover, that is, a handover execution condition corresponding to normal handover, may be configured for the candidate cell1, and at this time, all DRBs are not configured for DAPS handover; for other candidate cells such as cell2, if all DRBs are not configured for DAPS handover, the network configures a handover execution condition corresponding to non-DAPS handover at this time.

In an implementation of step 102, in response to receiving the handover command, the UE measures the signal quality of the candidate cell and the signal quality of the serving cell and determines whether the signal quality of the candidate cell satisfies a first condition and whether the signal quality of the serving cell satisfies a second condition. For example, the UE determines whether the signal quality of the candidate target cell is higher than the signal quality of the serving cell by a predetermined offset. The signal quality may have different forms, such as the received power of the reference signal, or the received quality of the reference signal, or the signal to interference plus noise ratio of the reference signal.

In the specific implementation of step 103, if the signal quality of the target candidate cell and the signal quality of the serving cell satisfy the handover execution condition corresponding to the DAPS handover, the UE performs the DAPS handover to the target candidate cell.

Specifically, the UE accesses the target cell by using the configuration parameters of the candidate target cell included in the handover command, synchronizes with the target cell, initiates a random access procedure in the target cell, and after sending a handover completion command (i.e., radio Resource Control (RRC) reconfiguration is completed), the UE performs handover to the target cell. The UE simultaneously maintains communication with the source base station and with the target base station (i.e., the base station to which the target cell belongs) during the handover procedure. In the process of switching, the UE waits until the UE has performed normal communication with the target cell and receives an instruction sent by the target cell to release the source side link, and then releases the connection with the source base station.

The embodiment of the invention realizes the cell switching under the condition of simultaneously configuring the conditional switching and the DAPS switching, and can improve the switching success rate and reduce the switching interruption time delay.

In one non-limiting embodiment of the present invention, the first condition comprises a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition comprises a measurement event A1.

Specifically, the measurement Event A3 (Event A3) refers to the fact that the signal quality of the intra/inter frequency neighbor cell is higher than that of the serving cell by a predetermined offset (neighbor times offset) amount. The measurement Event A5 (Event A5) means that the Serving cell signal quality is lower than the threshold1 and the neighbor cell signal quality is higher than the threshold2 (Serving beacons word threshold1 and neighbor beacons beta threshold 2). The measurement Event A4 (Event A4) means that the quality of the pilot neighbor signal is higher than a preset threshold (neighbor times threshold). The measurement event A3, the measurement event A5, and the measurement event A4 all set forth the requirement for the signal quality of the candidate cell, and one or more of the measurement event A3, the measurement event A5, and the measurement event A4 may be included in the first condition.

The measurement Event A1 (Event A1) refers to the Serving cell signal quality being higher than a certain threshold (Serving beacons threshold). The measurement event A1 is a requirement for signal quality of the serving cell, and the second condition may include the measurement event A1.

In the embodiment of the present invention, the UE determines whether the signal quality of the candidate cell satisfies the measurement event A3 and/or the measurement event A5 and/or the measurement event A4, and determines whether the signal quality of the serving cell satisfies the measurement event A1. If so, the UE performs DAPS handover to the candidate cell.

For example, the source base station configures a measurement event A3/A5/A4 (first condition) and a measurement event A1 (second condition) as handover execution conditions of the candidate Cell 1. After receiving the radio resources (placed in a Transparent Container) configured for the UE by the candidate Cell and the handover execution condition, the UE starts to evaluate Cell1 and the serving Cell. If Cell1 satisfies measurement event A3/A5/A4 and the serving Cell satisfies measurement event A1, the UE performs handover to Cell 1. The UE implements the DAPS handover according to the DAPS handover configuration (obtained through the Transparent Container) configured for the UE by the Cell 1.

On the contrary, if the UE finds that Cell1 satisfies the measurement event A3/A5/A4, but the serving Cell does not satisfy the measurement event A1, the UE performs a handover to Cell1 at this time, which is a non-DAPS handover, that is, a normal handover.

In another non-limiting embodiment of the invention, the first condition comprises a measurement event A3 and/or a measurement event A5 and/or a measurement event A4 and the second condition comprises a non-running timer T310 (including T310 not having timed out).

In a specific implementation, the timer T310 is a timer for the UE to determine the radio link failure. T310 is running, which means that the signal quality of the serving cell is relatively poor, and therefore whether to perform a DAPS handover is determined here by whether T310 is initiated.

For example, the source base station configures a measurement event A3/A5/A4 (first condition) as a handover execution condition of the candidate Cell1, and at this time, the network configuration may execute DAPS handover for Cell1, and only satisfies A3/A5/A4 (first condition) that only normal handover can be executed. After receiving the handover execution condition, the UE starts to evaluate Cell1 and the serving Cell. If Cell1 satisfies measurement event A3/A5/A4 and the UE does not run timer T310 (also including T310 not timed out), the UE performs a DAPS handover to Cell 1. The UE implements the DAPS handover according to the DAPS handover configuration (obtained through the Transparent Container) configured for the UE by the Cell 1.

On the contrary, if the UE finds that Cell1 satisfies the measurement event A3/A5/A4, but the UE runs the timer T310 (including T310 timeout), the UE performs a handover to Cell1, which is a non-DAPS handover, i.e. a normal handover.

In this embodiment, whether T310 operates is taken as a determination basis for whether the serving cell satisfies the second condition, which is a method for implicitly configuring the second condition, and it should be noted that, if the UE finds that T310 has operated before and currently times out, the UE considers that the second condition is not satisfied. In practice, there may be other ways to determine whether the serving cell meets the second condition, for example, if the serving cell fails to perform a radio link, or the UE finds that the serving cell is out of synchronization with the serving cell, the UE may consider that the serving cell signal quality does not meet the requirement, and the UE may not perform the DAPS handover. In other words, the second condition in the embodiment of the present invention may be that the serving cell does not have a radio link failure or maintains synchronization with the serving cell.

In one non-limiting embodiment of the invention, the UE needs to acquire the data radio bearer on which the DAPS handover is to be performed.

Specifically, the UE may obtain, from the handover command, a Data Radio Bearer (DRB) that needs to perform the DAPS handover, for example, an identifier of the Data Radio Bearer.

Further, when performing the DAPS handover, the UE configures the PDCP entity of the data radio bearer as a PDCP entity for DAPS handover, which is capable of simultaneously processing data from the serving cell and the target candidate cell.

For example, for the case that the data radio bearer DRB1 employs DAPS handover, the UE reconfigures the PDCP entity of DRB1 as the PDCP entity for DAPS handover. At this time, the PDCP entity can process data from both the source base station side and the target base station side at the same time. When the UE accesses the candidate Cell Cell1, the UE continues to maintain the connection with the serving Cell, after the UE successfully accesses the Cell1, the UE simultaneously keeps data transmission with the serving Cell and the Cell1, and the UE releases the connection with the serving Cell until the Cell1 sends a command of releasing the connection at the source side to the UE.

Accordingly, referring to fig. 2, the handover configuration method shown in fig. 2 may be used on a network device side, for example, a source base station (may also be referred to as a serving base station) side.

Specifically, the handover configuration method may include the following steps:

step 201: configuring a handover execution condition corresponding to a DAPS handover, the handover execution condition comprising a first condition indicating a requirement for signal quality of a candidate cell, or the handover execution condition comprising the first condition and a second condition indicating a requirement for signal quality of a serving cell;

step 202: and sending the handover execution condition, wherein the handover execution condition is used for executing the DAPS handover to the candidate cell when the signal quality of the target candidate cell meets the first condition and the signal quality of the serving cell meets the second condition.

In this embodiment, the handover execution condition may be carried in the handover command and sent.

For example, one UE establishes 3 bearers, DRB1, DRB2 and DRB3, where the quality of service parameter requirement of DRB1 is high and the data transmission delay is required to be short, so that the serving base station (the source base station before handover) prepares to configure a DAPS handover for DRB1, and the other two DRBs do not configure a DAPS handover. Meanwhile, in order to meet the success rate of switching, the serving base station intends to configure conditional switching for the UE. After receiving the measurement report sent by the UE, the serving base station finds that the UE is not located in the central area of the Cell, and in order to satisfy mobility, the serving base station selects Cell1 and Cell2 as candidate cells for UE handover according to the measurement report reported by the UE. The source base station (after negotiating with the candidate base station) may indicate, via the handover command, that for the candidate Cell1, DRB1 is configured as a DAPS handover, the other two DRBs are non-DAPS handovers, and the corresponding handover execution conditions; indicating that the candidate Cell2 is a non-DAPS handover (i.e. a conditional handover), and the corresponding handover execution condition.

In a specific embodiment, the source base station may configure the first condition to include a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition to include a measurement event A1. In this case, the handover command includes a first condition and a second condition. That is, the source base station configures the handover execution condition in an explicitly configured manner. The handover command may be sent to the UE through one RRC signaling or multiple RRC signaling, that is, the first condition and the second condition may be sent simultaneously, or the first condition and the second condition may be sent separately.

In a particular embodiment, the first condition includes a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition includes a non-running timer T310 (including T310 not having timed out). In this case, only the first condition is included in the handover command. That is to say, the source base station configures the handover execution condition corresponding to the DAPS handover in an implicit configuration manner, so that the signaling overhead is smaller.

Referring to fig. 3, fig. 3 shows an interaction flow chart.

In step 301, the source base station 302 sends a handover request to the candidate target base station 303.

In step 302, the source base station 302 sends a handover request to the candidate target base station 304.

In a specific implementation, the source base station 302 selects the candidate cells Cell1, cell2, and Cell3 as candidate cells for handover of the UE301 according to a measurement report reported by the UE301, and the source base station 302 may sequentially send handover requests to base stations (i.e., the candidate target base station 303 and the candidate target base station 304) to which the three cells belong. The base station to which the candidate Cell3 belongs is not shown in the figure. The indication in the handover request is a conditional handover.

In a specific implementation, the source base station 302 indicates that the handover is a conditional handover in the handover request sent to the base station (candidate target base station 303) to which the Cell1 belongs, and indicates that the DRB1 requests to be configured as a DAPS handover, and the other two DRBs are non-DAPS handovers, and the handover request does not need to indicate a handover execution condition to the candidate target base station 303.

The source base station 302 indicates that the current handover is a conditional handover in the handover request transmitted to the base station to which the Cell2 belongs (the candidate target base station 304). The source base station 302 determines that the handover of the UE301 from the serving Cell to the Cell2 cannot support the DAPS handover based on the combination of bandwidths supported by the UE301, and therefore, the handover request does not include information of the DAPS handover.

The source base station 302 indicates that the handover is a conditional handover in the handover request sent to the base station to which Cell3 belongs, and indicates that DRB1 is configured as a DAPS handover, and the other two DRBs are non-DAPS handovers.

In step 303, the candidate target base station 303 sends a handover request acknowledgement to the source base station 302.

In step 304, the candidate target base station 304 sends a handover request acknowledgement to the source base station 302.

In a specific implementation, the candidate

target base stations

303 and 304 may determine whether to accept the Handover Request based on their own load levels, and if so, configure necessary radio resources for the UE, and then return a Handover Request acknowledgement (which may be referred to as Handover Request acknowledgement or Handover Preparation acknowledgement) to the source base station; and if not, returning the request failure to the source base station.

In a specific implementation, if the candidate target base station 303 accepts the handover request, there may be two kinds of processing:

1. the candidate target base station 303 may configure radio resources that only support conditional handover (i.e. radio resource configuration for only conditional handover, which does not include DAPS handover information), and then return a handover request acknowledgement to the source base station 302;

2. for this scenario, the candidate target base station 303 configures the DRB1 as a DAPS handover, and additionally configures parameters related to the DAPS for the UE, specifically, power control parameters, such as an uplink power sharing Mode (uplinkPowerSharingDAPS-Mode) configured in the DAPS handover process, configured wireless parameters, and the like, so that the UE301 determines that the Cell1 satisfies the handover execution condition and then applies the radio resources.

The candidate target base station 303 may indicate to the source base station through two separate interface signaling that only radio resources supporting conditional handover are configured and that radio resources supporting conditional handover and DAPS handover are configured, respectively.

The candidate Target base station 303 may also indicate in one handover request confirm message that only the first radio resource configuration (Target NG-RAN node To Source NG-RAN node handover Container 1) supporting the conditional handover and the second radio resource configuration (Target NG-RAN node To Source NG-RAN node handover Container 2) supporting the conditional handover and the DAPS handover are configured at the same time. Generally, the radio resources configured for the UE by the candidate target base station are all placed in a Transparent Container (Transparent Container), and the source base station does not need to parse the contents in this Container and directly sends the contents to the UE. If it is indicated in a handover request confirm message that only the radio resource supporting conditional handover (denoted by the handover Container 1) and the radio resource supporting conditional handover and DAPS handover (denoted by the handover Container 2) are configured at the same time, the candidate target base station needs to specify to the source base station which configuration the conditional handover corresponds to. The candidate target base station may indicate that the transfer Container2 is configured with the DAPS (indicated by the additional information element), while the transfer Container 1 is not configured with the DAPS; or only the transfer Container2 is indicated to be configured with the DAPS, and by default no transfer Container 1 indicating that the DAPS is configured is not included.

Only radio resources corresponding to conditional handover need to be configured for the candidate target base station 304, and then sent to the source base station 302 through a handover request acknowledgement. The base station to which the candidate Cell3 belongs may employ the same processing mechanism as the candidate target base station 303.

In step 305, the source base station 302 transmits a handover command to the UE 301.

Specifically, after receiving the handover request acknowledgement returned by the different candidate target base stations, the source base station 302 configures corresponding handover execution conditions, carries the handover execution conditions in the handover command, and sends the handover command to the UE. Different candidate cells may be configured with different or the same handover execution conditions.

In step 306, the UE301 measures and evaluates the signal quality of the candidate cell and the signal quality of the serving cell.

In step 307, the UE301 performs handover when the candidate cell satisfies the handover execution condition.

In a specific implementation, for the candidate Cell1, there are two radio resource configurations, and the source base station 302 may set different handover execution conditions, where the source base station 302 needs to set the signal quality of the serving Cell to meet a certain requirement, for example, the event A1 may be increased, except for using the original handover execution conditions, such as the event A3 and/or the event A5 and/or the event A4, where the handover execution conditions include A3/A5/A4+ A1, and are respectively directed to the candidate target Cell and the serving Cell. If the transport Transparent Container (Transparent Container 2) is a conditional handover configured with a DAPS, the source base station 302 configures A3/A5/A4+ A1 as a handover execution condition of the Cell1, and after the UE receives the handover execution conditions of the Transparent Container2 and the Transparent Container A3/A5/A4+ A1, the UE starts to evaluate the Cell1 and the serving Cell, and if the Cell1 satisfies A3/A5/A4 and the serving Cell satisfies A1, the UE performs a handover to the Cell1, and performs a DAPS handover according to the DAPS handover configuration configured for the UE by the Cell1 (through the Transparent Container 2), that is, the DAPS handover is adopted for the DRB1, and the UE reconfigures the PDCP entity of the DRB1 to the PDCP entity for the DAPS handover, which can process data from the source side and the target side at the same time, and when the UE performs Cell access, the UE continues to maintain the connection with the serving Cell, and after the UE successfully accesses the Cell1, the PDCP entity maintains the connection with the source side and the UE simultaneously releases the connection with the source side and the Cell, and the UE releases the connection with the Cell1, and transmits the source side.

In an optional embodiment, for the candidate Cell1 configured with conditional handover of DAPS, the source base station may continue to use the existing A3/A5/A4 to determine whether the neighboring Cell meets the handover condition without explicitly configuring the handover execution condition; meanwhile, the UE judges whether to execute DAPS handover according to the signal quality of the serving cell, such as whether to start T310, and when the T310 does not operate (including no overtime), the UE executes DAPS handover; otherwise the UE performs a non-DAPS handover.

For the candidate Cell2, the source base station 302 may set only the handover performing conditions of A3/A5/A4 so that the UE evaluates for Cell2 whether the handover performing conditions are satisfied.

For the candidate Cell3, the source base station 302 may set the handover performing condition of A3/A5/A4+ A1, or set the handover performing condition of only A3/A5/A4, and the UE additionally adopts T310 for the DAPS handover to determine.

In an optional embodiment, for the candidate Cell1 configured with conditional handover of DAPS, the source base station may set the handover execution condition to include A3/A5/A4+ A1 for determining whether to execute DAPS handover, and may set the handover execution condition to include A3/A5/A4 for determining normal non-DAPS handover. The threshold may be the same for A3/A5/A4 in the DAPS handover execution condition and may be different from the threshold for A3/A5/A4 in the non-DAPS handover execution condition. Taking the A3 event as an example (the candidate cell is higher than the signal quality of the serving cell by a predetermined offset), the offset corresponding to A3 in the DAPS handover performing condition may be the same as the offset corresponding to A3 in the non-DAPS handover performing condition; it may also be set that the offset corresponding to A3 in the non-DAPS handover execution condition takes a higher value, for example, 3db, and the offset corresponding to A3 in the DAPS handover execution condition takes a lower value, for example, 0db, so that the UE is more likely to trigger the DAPS handover, which is convenient for reducing the handover interruption delay. If the handover execution condition is an A4 event (candidate cell signal quality is above a preset threshold), then the A4 event setting higher threshold in the non-DAPS handover execution condition may be set. Accordingly, if the handover execution condition is an A5 event (serving cell signal quality is below threshold1 and candidate cell signal quality is above threshold 2), the threshold2 may be set higher and the threshold1 lower in the non-DAPS handover execution condition to make it easier for the UE to trigger the DAPS handover.

In step S308, random access is performed between the UE301 and the candidate target base station 303.

In step S309, the UE301 sends RRC reconfiguration complete to the candidate target base station 303.

For accessing the target cell through the random access procedure between the UE and the base station, reference may be made to the prior art, and details are not described herein.

Referring to fig. 4, an embodiment of the present invention further discloses a cell switching apparatus 40. The cell switching apparatus 40 may include:

an obtaining module 401, configured to obtain a handover execution condition corresponding to DAPS handover, where the handover execution condition includes a first condition and a second condition, the first condition indicates a requirement for signal quality of a candidate cell, and the second condition indicates a requirement for signal quality of a serving cell;

a measuring module 402 for measuring and evaluating the signal quality of the candidate cell and the signal quality of the serving cell;

a handover module 403, configured to perform a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

In a specific implementation, the cell switching device may correspond to a Chip having a cell switching function in the ue, such as a System-On-a-Chip (SOC), a baseband Chip, and the like; or the user equipment comprises a chip module with a cell switching function; or to a chip module having a chip with data processing function, or to a user equipment.

Referring to fig. 5, an embodiment of the invention further discloses a switching configuration device 50. The switching configuration means 50 may comprise:

a configuration module 501, configured to configure a handover execution condition corresponding to DAPS handover, where the handover execution condition includes a first condition and a second condition, the first condition indicates a requirement for signal quality of a candidate cell, and the second condition indicates a requirement for signal quality of a serving cell;

a sending module 502, configured to send the handover execution condition, where the handover execution condition is used to execute DAPS handover to the candidate cell when the signal quality of the target candidate cell meets the first condition and the signal quality of the serving cell meets a second condition.

In a specific implementation, the switching configuration device may correspond to a Chip having a switching configuration function in a network device, such as a System-On-a-Chip (SOC), a baseband Chip, or the like; or the network equipment comprises a chip module with a switching configuration function; or to a chip module having a chip with a data processing function, or to a network device.

For more details of the operation principle and the operation manner of the cell switching apparatus 40 or the handover configuration apparatus 50, reference may be made to the relevant descriptions in fig. 1 to fig. 3, and details are not repeated here.

Each module/unit included in each apparatus and product described in the above embodiments may be a software module/unit, or may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit. For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.

Referring to fig. 6, an embodiment of the present invention further discloses a handover configuration method, where the handover configuration method may be used at the side of the candidate target base station, that is, the candidate target base station may perform each step of the method.

step 601: receiving a handover request, the handover request indicating a conditional handover request;

step 602: configuring a first radio resource configuration for non-DAPS handover and a second radio resource configuration for DAPS handover;

step 603: transmitting the first radio resource configuration and the second radio resource configuration.

In this embodiment, the candidate target base station may determine whether to accept the Handover Request according to its own load level, and if so, configure necessary radio resources for the UE, and then return a Handover Request acknowledgement (which may be referred to as Handover Request acknowledgement or Handover Preparation acknowledgement) to the source base station. And if not, returning the request failure to the source base station.

Specifically, after accepting the handover request, the candidate target base station may have the following two processes:

1. the candidate target base station may configure a first radio resource configuration only supporting the conditional handover (i.e. a radio resource configuration only for the conditional handover, which does not include the DAPS handover information), and then confirm by returning a handover request to the source base station;

2. the candidate target base station may configure a second radio resource configuration that supports the conditional handover and the DAPS handover. For example, the candidate target base station configures DRB1 for DAPS handover, and additionally configures DAPS-related parameters for the UE, such as uplink power sharing Mode (uplink shared DAPS-Mode) configured radio parameters during the DAPS handover.

In one non-limiting embodiment, the candidate target base station may send the first radio resource configuration and the second radio resource configuration in two separate signaling. The two independent signaling are X2/Xn interface signaling or newly added signaling.

Wherein, data can be transmitted between the 5G base stations through an Xn interface. And data is transmitted between the 4G base station and the 5G base station through an X2 interface. That is, the first radio resource configuration and the second radio resource configuration may be transmitted over an interface between base stations. The candidate target base station can respectively indicate the source base station to configure only the radio resources supporting the conditional handover and the DAPS handover through two independent interface signaling.

In another non-limiting embodiment, a candidate target base station may send a handover request acknowledgement including the first radio resource configuration and the second radio resource configuration.

In this embodiment, the first radio resource allocation and the second radio resource allocation may be carried in the handover request acknowledgement and sent out.

In one non-limiting embodiment, the handover request acknowledgement includes a first transparent container that places the first radio resource configuration and a second transparent container that places the second radio resource configuration.

Further, the handover request acknowledgement includes indication information indicating that the second transparent container corresponds to a DAPS handover, or the indication information indicates that the first transparent container corresponds to a non-DAPS handover and the second transparent container corresponds to a DAPS handover.

In a specific implementation, the candidate Target base station indicates that only the first radio resource configuration (Target NG-RAN node To Source NG-RAN node transfer Container 1) supporting the conditional handover and the second radio resource configuration (Target NG-RAN node To Source NG-RAN node transfer Container 2) supporting the conditional handover and the DAPS handover are configured simultaneously in one handover request acknowledgement message. Generally, the radio resources configured for the UE by the candidate target base station are all placed in a Transparent Container (Transparent Container), and the source base station does not need to parse the contents in this Container and directly sends the contents to the UE. If it is indicated in a handover request confirm message that only the radio resource supporting conditional handover (denoted by the handover Container 1) and the radio resource supporting conditional handover and DAPS handover (denoted by the handover Container 2) are configured at the same time, the candidate target base station needs to specify to the source base station which configuration the conditional handover corresponds to. The candidate target base station may indicate that the transient Container2 is configured with the DAPS (indicated by the additional cell), while the transient Container 1 is not configured with the DAPS; or only the transfer Container2 is indicated to be configured with the DAPS, and by default no transfer Container 1 indicating that the DAPS is configured is not included.

For example, the base station to which the candidate Cell1 belongs may send the two radio resource configurations to the source base station through independent signaling or a handover request acknowledgement. The base station to which the candidate Cell2 belongs only needs to switch the corresponding radio resource configuration according to the configuration condition, and then confirms and sends the configuration to the source base station through the switching request. The base station to which the candidate Cell3 belongs may employ the same processing mechanism as the base station to which the candidate Cell1 belongs.

Accordingly, referring to fig. 7, an embodiment of the present invention further discloses a handover configuration method, where the handover configuration method may be used at the source base station side, that is, the source base station may perform each step of the method.

step 701: sending a switching request, wherein the switching request indicates a conditional switching request;

step 702: receiving a first radio resource configuration for a non-DAPS handover and a second radio resource configuration for a DAPS handover.

In a specific implementation, the source base station may directly forward the first radio resource configuration and the second radio resource configuration to the UE through the handover command.

In a specific embodiment, the source base station may determine that the candidate cell applies non-DAPS handover according to a network condition of the candidate cell, and/or configure at least one radio data bearer as DAPS handover; and carrying first indication information indicating the non-DAPS handover in the handover request, and/or carrying second indication information indicating a radio data bearer requesting to execute the DAPS handover.

For example, after receiving a measurement report sent by the UE, the source base station finds that the UE is not already in the central area of the Cell, and in order to satisfy mobility, the source base station selects Cell1, cell2, and Cell3 as candidate cells for UE handover according to the measurement report reported by the UE, and the source base station may sequentially send a handover request to base stations (i.e., candidate target base stations) to which the three cells belong:

if the source base station sends a handover request to the base station (base station 1) to which the Cell1 belongs, the handover request indicates that the current handover is conditional handover, and indicates that the DRB1 requests to be configured as DAPS handover, and the other two DRBs are non-DAPS handover, the handover request does not need to indicate a handover execution condition to the base station 1;

the source base station may send a handover request to the base station (base station 2) to which the Cell2 belongs, where the handover request indicates that the current handover is a conditional handover, and the serving Cell determines, based on the bandwidth combination supported by the UE, that the UE is handed over from the serving Cell to the Cell2 and cannot support the DAPS handover, so that the handover request does not include information of the DAPS handover.

The source base station sends a handover request to the base station (base station 3) to which the Cell3 belongs, and indicates that the handover is a conditional handover and that the DRB1 is configured as a DAPS handover and the other two DRBs are non-DAPS handovers in the handover request.

Further, the source base station may further determine a conditional handover execution condition and a DAPS handover execution condition according to the first radio resource configuration and the second radio resource configuration, respectively.

Specifically, for the candidate Cell1, there are two radio resource configurations, and the source base station may set different handover execution conditions, and besides using the original handover execution condition, that is, the first condition, such as the event A3 and/or the event A5 and/or the event A4, the source base station also needs to set the signal quality of the source serving Cell to satisfy a certain requirement, that is, the second condition, for example, the event A1 may be added. Or the source base station only configures the first condition, and the UE determines whether to start T310 for the source side to determine whether to perform DAPS handover at the time of handover.

Specifically, for the candidate Cell2, there is only one radio resource configuration, i.e. the first radio resource configuration, the source base station may set only the handover execution conditions of A3/A5/A4, so that the UE evaluates whether the handover execution conditions are satisfied for Cell 2.

For the candidate Cell3, there are two radio resource configurations, the source base station may set the handover execution condition of A3/A5/A4+ A1, or the source base station only sets the handover execution condition of A3/A5/A4, and the UE additionally adopts T310 for the DAPS handover.

After receiving the configurations of the candidate cells Cell1, cell2, and Cell3 and the corresponding handover execution conditions, the UE evaluates the three candidate cells and evaluates the serving Cell to determine to execute the corresponding Cell handover.

The embodiment of the present invention also discloses a storage medium, which is a computer readable storage medium, and a computer program is stored on the storage medium, and when the computer program runs, the steps of the method in the foregoing embodiments may be executed. The storage medium may include ROM, RAM, magnetic or optical disks, etc. The storage medium may further include a non-volatile memory (non-volatile) or a non-transitory memory (non-transient), and the like.

The embodiment of the invention also discloses user equipment which can comprise a memory and a processor, wherein the memory is stored with a computer program which can run on the processor. The processor, when executing the computer program, may perform the steps of the cell handover method.

The embodiment of the invention also discloses network equipment, and the user equipment can comprise a memory and a processor, wherein the memory is stored with a computer program which can run on the processor. The steps of the handover configuration method may be performed by the processor when running the computer program. The network device may be a base station or a core network.

The technical solution of the present invention is also applicable to different network architectures, including but not limited to a relay network architecture, a dual link architecture, a Vehicle-to-electrical (communication from Vehicle to any object) architecture, and the like.

In this embodiment of the present application, the Core Network may be an evolved packet Core (EPC for short), a 5G Core Network (5G Core Network), or may be a novel Core Network in a future communication system. The 5G Core Network is composed of a set of devices, and implements Access and Mobility Management functions (AMF) for Mobility Management and other functions, user Plane Function (UPF) for providing packet routing and forwarding and QoS (Quality of Service) Management functions, session Management Function (SMF) for providing Session Management, IP address allocation and Management functions, and the like. The EPC may be composed of an MME providing functions such as mobility management, gateway selection, etc., a Serving Gateway (S-GW) providing functions such as packet forwarding, etc., and a PDN Gateway (P-GW) providing functions such as terminal address allocation, rate control, etc.

A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node B (NodeB), a device providing a base station function in a 4G network includes an Evolved node B (eNB), and in a Wireless Local Area Network (WLAN), the device providing a base station function is an Access Point (AP), a device providing a base station function in a 5G New Radio (NR) is a gNB, and a node B (ng-eNB) continues to evolve, where the gNB and the terminal communicate with each other by using an NR technique, the ng-eNB and the terminal communicate with each other by using an E-a (Evolved Universal Radio Access) technique, and both the gNB and the ng-eNB may be connected to the 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system.

The base station controller in the embodiment of the present application is a device for managing a base station, for example, a Base Station Controller (BSC) in a 2G network, a Radio Network Controller (RNC) in a 3G network, or a device for controlling and managing a base station in a future new communication system.

The network on the network side in the embodiment of the present invention refers to a communication network providing a communication service for a terminal, and includes a base station of a radio access network, a base station controller of the radio access network, and a device on the core network side.

A terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal equipment), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

It should be understood that the term "and/or" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

The "plurality" appearing in the embodiments of the present application means two or more.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for the purpose of illustrating and differentiating the description objects, and do not represent any particular limitation to the number of devices in the embodiments of the present application, and cannot constitute any limitation to the embodiments of the present application.

The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application.

It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for cell handover, comprising:

acquiring a handover execution condition corresponding to the DAPS handover, wherein the handover execution condition comprises a first condition and a second condition, the first condition indicates requirements for the signal quality of the candidate cell, and the second condition indicates requirements for the signal quality of the serving cell;

measuring signal quality of the candidate cell and signal quality of the serving cell;

performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

2. The cell handover method according to claim 1, wherein the first condition comprises a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition comprises a measurement event A1.

3. The cell handover method of claim 2, wherein the performing the DAPS handover to the candidate cell comprises:

performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the measurement event A3 and/or the measurement event A5 and/or the measurement event A4 and the signal quality of the serving cell satisfies the measurement event A1.

4. The cell handover method according to claim 1, wherein the first condition comprises a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition comprises not running a timer T310.

5. The cell handover method of claim 4, wherein the performing the DAPS handover to the candidate cell comprises:

performing a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the measurement event A3 and/or A5 and/or A4 and the timer T310 is not run for the serving cell.

6. The cell switching method according to claim 1, further comprising:

performing a handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell does not satisfy the second condition.

7. The cell switching method according to claim 1, wherein the obtaining the handover execution condition corresponding to the DAPS handover further comprises:

a data radio bearer required to perform a DAPS handover is acquired.

8. The cell handover method of claim 7, wherein the performing the DAPS handover to the candidate cell comprises:

configuring the PDCP entity of the data radio bearer as a PDCP entity for DAPS handover capable of simultaneously processing data from the serving cell and the candidate cell.

9. A handover configuration method, comprising:

configuring a handover execution condition corresponding to a DAPS handover, the handover execution condition comprising a first condition indicating a requirement for signal quality of a candidate cell, or the handover execution condition comprising the first condition and a second condition indicating a requirement for signal quality of a serving cell;

and sending the handover execution condition, wherein the handover execution condition is used for executing DAPS handover to the candidate cell when the signal quality of the target candidate cell meets the first condition and the signal quality of the serving cell meets a second condition.

10. The handover configuration method according to claim 9, wherein the first condition comprises a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, and the second condition comprises a measurement event A1.

11. The handover configuration method according to claim 9, wherein the first condition comprises a measurement event A3 and/or a measurement event A5 and/or a measurement event A4, the second condition comprises not running a timer T310, and the configuring the handover execution condition for DAPS handover comprises:

the signaling configuring the handover execution condition includes only the first condition.

12. A cell switching apparatus, comprising:

an obtaining module, configured to obtain a handover execution condition corresponding to DAPS handover, where the handover execution condition includes a first condition and a second condition, the first condition indicates a requirement for signal quality of a candidate cell, and the second condition indicates a requirement for signal quality of a serving cell;

a measurement module for measuring signal quality of the candidate cell and signal quality of the serving cell;

a handover module, configured to perform a DAPS handover to the candidate cell if the signal quality of the candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

13. A switch configuration device, comprising:

a configuration module, configured to configure a handover execution condition corresponding to DAPS handover, where the handover execution condition includes a first condition and a second condition, the first condition indicates a requirement for signal quality of a candidate cell, and the second condition indicates a requirement for signal quality of a serving cell;

a sending module, configured to send the handover execution condition, where the handover execution condition is used to execute DAPS handover to a candidate cell when the signal quality of a target candidate cell satisfies the first condition and the signal quality of the serving cell satisfies a second condition.

14. A computer-readable storage medium, having stored thereon a computer program, wherein the computer program is adapted to, when executed by a processor, perform the steps of the cell handover method according to any one of claims 1 to 8, or the steps of the handover configuration method according to any one of claims 9 to 11.

15. A user equipment comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the cell handover method of any one of claims 1 to 8.

16. A network device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the handover configuration method of any of claims 9 to 11.