CN109729559B

CN109729559B - Cell switching method and device, storage medium, user equipment and network equipment

Info

Publication number: CN109729559B
Application number: CN201711046199.1A
Authority: CN
Inventors: 孙宇
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2017-10-31
Filing date: 2017-10-31
Publication date: 2020-09-01
Anticipated expiration: 2037-10-31
Also published as: CN109729559A

Abstract

A cell switching method and device, a storage medium, user equipment and network equipment are provided, and the method comprises the following steps: receiving measurement control information sent by a source cell, wherein the measurement control information comprises BWP (bwpeer-to-peer) supported by each neighbor cell, and the BWP comprises default BWP and service BWP; measuring the BWP of each adjacent cell according to the measurement control information to obtain a measurement report, wherein the measurement report at least comprises the measurement result of the default BWP of each adjacent cell; sending a measurement report to a source cell so that the source cell determines a target cell; receiving a handover command sent by a source cell, wherein the handover command comprises a default BWP of a target cell and configuration information associated with a service BWP of the target cell; and accessing the target cell according to the default BWP, and determining the adopted service BWP according to the configuration information to continue service transmission by using the adopted service BWP. By the scheme of the invention, the rate drop time caused by switching can be reduced as much as possible, and the data transmission rate is improved.

Description

Cell switching method and device, storage medium, user equipment and network equipment

Technical Field

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

Background

To accommodate different bandwidth capabilities of different User Equipments (UEs), The Fifth-Generation mobile communication (5G) system introduces a new concept of "bandwidth Part (BWP)" while setting a large bandwidth to increase communication rate, so that a UE can be allocated to a BWP matching its bandwidth capability. The 5G system divides BWP into a default BWP and a traffic BWP. The default BWP is the minimum bandwidth that satisfies the UE access to the 5G system, and in general, the default BWP is a narrowband and cannot implement high-speed data transmission; the service BWP is broadband and can perform high-speed data transmission. Considering that the network does not know the bandwidth capability of the UE when the UE initially accesses the network, or considering the limitation of the amount of network access resources, the procedure of initially accessing the network by the UE is generally completed using a default BWP.

After the UE accesses the network, the bandwidth capability of the UE can be reported to the network, and the network configures the business BWP for the UE according to the bandwidth capability of the UE so as to meet the requirement of high-speed data transmission. The network may contain multiple traffic BWPs, with the specific allocation of which BWP depends on the measurement results of the UE. For the UE, the center frequency points of the default BWP and the service BWP may be different, that is, the measurement of the service BWP by the UE is pilot frequency measurement, and therefore, the network needs to configure a measurement gap for measurement. After the UE reports the measurement result, the network allocates a service BWP to the UE according to the measurement result, and activates the service BWP, so that the UE performs high-speed transmission on the service BWP.

Based on the handover procedure of the 5G system specified by the current NR protocol, after the UE is handed over from the source cell to the target cell, the target cell can only allocate a default BWP for the UE to continue data transmission. After the UE completes the measurement and reporting of the service BWP of the target cell, the target cell may allocate the service BWP to the UE to increase the rate. During this time, the UE can only transmit data on the narrowband default BWP, which may cause a data rate drop problem.

With the existing NR protocol, the UE will transmit data with the default BWP for a long time after the handover is completed, and the data transmission rate is low.

Disclosure of Invention

The technical problem to be solved by the present invention is how to realize the handover of the UE from the source cell to the target cell, and to quickly transmit data using the service BWP after the handover to the target cell, so as to reduce the transmission time of the UE using the default BWP as much as possible, thereby improving the data transmission rate.

In order to solve the foregoing technical problem, an embodiment of the present invention provides a cell switching method, where the cell switching method includes: receiving measurement control information sent by a source cell, wherein the measurement control information comprises information of BWPs supported by each neighbor cell, and the BWPs comprise default BWPs and service BWPs; measuring the BWP of each neighbor cell according to the measurement control information to obtain a measurement report, wherein the measurement report at least comprises the measurement result of the default BWP of each neighbor cell; sending the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report; receiving a handover command sent by the source cell, the handover command including a default BWP of the target cell and configuration information associated with a serving BWP of the target cell; accessing the target cell according to the default BWP of the target cell, and determining an actually adopted service BWP according to the configuration information, so as to continue service transmission by using the actually adopted service BWP.

Optionally, if the measurement report is a measurement result of the default BWP of each neighbor cell, the configuration information associated with the service BWP includes the default BWP of the target cell and measurement control information of each service BWP.

Optionally, the step of determining the actually adopted service BWP according to the configuration information includes: after receiving the handover command sent by the source cell, performing measurement according to the measurement control information of each service BWP to obtain a measurement result of each service BWP; transmitting a measurement result of each traffic BWP to the target cell; receiving an actually adopted service BWP configured by the target cell, the actually adopted service BWP being determined by the target cell according to a measurement result of each service BWP.

Optionally, the step of determining the actually adopted service BWP according to the configuration information further includes: and sending a handover completion message to the target cell after accessing the target cell, wherein the handover completion message carries a measurement result of the completed service BWP.

Optionally, the step of determining the actually adopted service BWP according to the configuration information further includes: if the measurement of all the service BWPs is not completed when the handover complete message is sent, after accessing the target cell, the measurement of the service BWPs for which measurement results are not obtained is preferentially performed, and when the measurement is completed, the obtained measurement results are sent to the target cell.

Optionally, the preferentially performing measurement on the service BWP without the measurement result includes: receiving a measurement gap sent by the target cell; and measuring the service BWP without the measurement result according to the measurement gap.

Optionally, if the measurement report is a measurement result of a service BWP and a default BWP of each neighbor cell, the configuration information associated with the service BWP includes the default BWP of the target cell and the actually-used service BWP, and the actually-used service BWP is determined by the target cell according to the measurement report.

Optionally, before continuing the service transmission by using the actually used service BWP, receiving downlink control indication information for activating the service BWP sent by the target cell.

Optionally, the downlink control indication information of the service BWP is included in a random access response or a collision resolution message.

Optionally, if the access mode is a non-conflicting access mode, the downlink control indication information of the service BWP is included in the random access response message; if the access mode is a conflicting access mode, the downlink control indication information of the service BWP is included in a conflict resolution message.

Optionally, before receiving the measurement control information sent by the source cell, receiving a notification sent by the source cell and indicating the default BWP of each neighbor cell.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a cell switching method, where the cell switching includes: sending measurement control information to a user equipment, wherein the measurement control information comprises information of BWPs supported by each neighbor cell, and the BWPs comprise default BWPs and service BWPs; receiving a measurement report of BWP of each neighbor cell from the user equipment, determining a target cell according to the measurement report, and sending the measurement report to the target cell, wherein the measurement report at least comprises a measurement result of default BWP of each neighbor cell; receiving a default BWP configured by the target cell and configuration information associated with a serving BWP; and sending a handover command to the user equipment, wherein the handover command includes the default BWP of the target cell and configuration information associated with the service BWP of the target cell, so that the user equipment accesses the target cell according to the default BWP of the target cell and determines the actually adopted service BWP according to the configuration information.

Optionally, if the measurement report is a measurement result of the default BWP of each neighbor cell, the configuration information associated with the traffic BWP includes the default BWP of the target cell and measurement control information of the traffic BWP.

Optionally, before sending the measurement control information, sending a notification indicating a default BWP of each neighbor cell to the user equipment.

To solve the above problem, an embodiment of the present invention further provides a cell switching apparatus, where the cell switching apparatus includes: a second receiving module, adapted to receive measurement control information sent by a source cell, where the measurement control information includes information of BWPs supported by each neighbor cell, and the BWPs include a default BWP and a service BWP; a measurement module adapted to measure BWP of each neighbor cell according to the measurement control information to obtain a measurement report, the measurement report including at least measurement results of default BWP of each neighbor cell; a first sending module, adapted to send the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report; a third receiving module, adapted to receive a handover command sent by the source cell, the handover command including a default BWP of the target cell and configuration information associated with a traffic BWP of the target cell; a determining module, adapted to access the target cell according to the default BWP, and determine an actually adopted service BWP according to the configuration information, so as to continue service transmission using the actually adopted service BWP.

Optionally, the determining module includes: a measurement sub-module, adapted to perform measurement according to measurement control information of each service BWP after receiving the handover command sent by the source cell, so as to expect a measurement result of each service BWP; a first transmission sub-module adapted to transmit a measurement result of each traffic BWP to the target cell; a first receiving sub-module adapted to receive an actually adopted traffic BWP configured by the target cell, the actually adopted traffic BWP being determined by the target cell based on a measurement result of each traffic BWP.

Optionally, the determining module further includes: and the second sending submodule is suitable for sending a handover completion message to the target cell after accessing the target cell, and carrying the measurement result of the completed service BWP in the handover completion message.

Optionally, the determining module further includes: a measurement sending sub-module, adapted to, if the measurement of all the traffic BWPs is not completed when the handover complete message is sent, preferentially perform the measurement of the traffic BWPs for which no measurement result is obtained after accessing the target cell, and send the obtained measurement result to the target cell when the measurement is completed.

Optionally, the measurement sending sub-module further includes: a receiving unit, adapted to receive the measurement gap sent by the target cell; a measurement unit adapted to perform a measurement of the unmeasured traffic BWP according to the measurement gap.

Optionally, the determining module further includes a second receiving sub-module, adapted to receive downlink control indication information, which is sent by the target cell and activates the service BWP, before the service transmission is continued by using the actually used service BWP.

Optionally, the cell switching apparatus further includes a first receiving module, adapted to receive a notification indicating the default BWP of each neighbor cell sent by the source cell before the measurement control information sent by the source cell is received.

To solve the foregoing technical problem, an embodiment of the present invention further provides a cell switching apparatus, where the cell switching apparatus includes: a third sending module, adapted to send measurement control information to the user equipment, the measurement control information including information of BWPs supported by each neighbor cell, the BWPs including a default BWP and a traffic BWP; a fourth receiving module, adapted to receive a measurement report of BWP of each neighbor cell from the user equipment, determine a target cell according to the measurement report, and send the measurement report to the target cell, the measurement report including at least a measurement result of default BWP of each neighbor cell; a fifth receiving module adapted to receive a default BWP configured for the target cell and configuration information associated with a serving BWP; a sending determination module adapted to send a handover command to the user equipment, the handover command including a default BWP of the target cell and configuration information associated with a traffic BWP of the target cell, so that the user equipment accesses the target cell according to the default BWP of the target cell and determines an actually adopted traffic BWP according to the configuration information.

Optionally, if the measurement report is a measurement result of a default BWP of each neighbor cell, the configuration information associated with the service BWP includes the default BWP of the target cell and measurement control information of the service BWP.

Optionally, the cell switching apparatus further includes: a second sending module adapted to send a notification indicating a default BWP of each neighbor cell to the user equipment before sending the measurement control information.

In order to solve the above technical problem, an embodiment of the present invention further provides a storage medium, where computer instructions are stored, and when the computer instructions are executed, the steps of the cell handover method are executed.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a user equipment, which includes a memory and a processor, where the memory stores a computer instruction executable on the processor, and the processor executes the steps of the cell handover method when executing the computer instruction.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a network device, including a memory and a processor, where the memory stores a computer instruction executable on the processor, and the processor executes the steps of the cell handover method when executing the computer instruction.

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

the embodiment of the invention provides a cell handover method, first, a UE receives measurement control information sent by a source cell, where the measurement control information includes information of BWPs supported by each neighboring cell, and the BWPs include a default BWP and a service BWP, so that the UE can know the default BWP and the service BWP of each neighboring cell before cell handover; then, according to the measurement control information, the UE may measure BWPs of the neighboring cells before cell handover to obtain a measurement report, where the measurement report at least includes measurement results of default BWPs of the neighboring cells; then, the UE sends the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report; then, the UE receives a handover command sent by the source cell, where the handover command includes a default BWP of the target cell and configuration information associated with a service BWP of the target cell, and since the UE already knows the configuration information associated with the service BWP of the target cell before cell handover is completed, the UE can measure the service BWP supported by the target cell in advance to obtain a measurement result of the service BWP; finally, when performing cell handover, the UE may access the target cell according to the default BWP of the target cell, and determine an actually used service BWP according to the configuration information, so as to continue data transmission using the actually used service BWP. Through the cell switching scheme provided by the embodiment of the invention, the UE can measure the service BWP supported by the target cell as early as possible to obtain a relevant measurement result, realize that the UE is switched from the source cell to the target cell, and quickly adopt the service BWP to transmit data after being switched to the target cell, so as to reduce the transmission time of adopting the default BWP by the UE as far as possible, thereby improving the data transmission rate.

Further, if the measurement report is a measurement result of the default BWP of each neighbor cell, the UE may acquire measurement control information of each service BWP supported by the target cell from a handover command received by the source cell. Then, the UE may try to measure each service BWP supported by the target cell during the handover process, so that the UE may perform data transmission based on the service BWP after the handover is completed, thereby shortening the time for transmitting data on the default BWP as much as possible, reducing the data transmission drop time caused by the handover to the maximum, and increasing the data transmission rate.

Further, an embodiment of the present invention provides a cell handover method, first, a source cell sends measurement control information to a UE, where the measurement control information includes BWP information of a service BWP and a default BWP supported by each neighboring cell, and the source cell sends the BWP information supported by each neighboring cell to the UE, so that the UE can measure the default BWP and the service BWP of each neighboring cell in advance, and the source cell can advantageously select a suitable target cell for handover; then, the source cell receives a measurement report of BWP of each neighboring cell from the UE, determines a target cell according to the measurement report, and sends a measurement report related to the target cell; then, the source cell receives a default BWP configured by the target cell and configuration information associated with a serving BWP; finally, the source cell sends a handover command including the default BWP of the target cell and configuration information associated with the traffic BWP of the target cell to the UE, so that the UE can access the target cell according to the default BWP of the target cell and determine the actually employed traffic BWP according to the configuration information. By the cell switching scheme provided by the embodiment of the invention, the network can acquire the measurement result of the service BWP of the target cell as early as possible, so as to shorten the time of data transmission on the default BWP in the cell switching process, reduce the data transmission drop time caused by switching to the maximum extent and improve the data transmission rate.

Drawings

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

FIG. 2 is a flowchart illustrating an embodiment of step S105 shown in FIG. 1;

fig. 3 is a flowchart illustrating a cell switching method according to another embodiment of the present 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 another cell switching apparatus according to an embodiment of the present invention;

FIG. 6 is a signaling interaction diagram of an exemplary application scenario in which embodiments of the present invention are employed;

fig. 7 is a signaling interaction diagram of another exemplary application scenario in which an embodiment of the present invention is employed.

Detailed Description

Those skilled in the art will appreciate that, as is known in the art, the use of the current NR protocol will result in the UE transmitting data with the default BWP for a long period of time after the handover is completed, with a low data transmission rate.

The embodiment of the invention provides a cell handover method, first, a UE receives measurement control information sent by a source cell, where the measurement control information includes information of BWPs supported by each neighboring cell, and the BWPs include a default BWP and a service BWP, so that the UE can know the default BWP and the service BWP of each neighboring cell before cell handover; then, according to the measurement control information, the UE may measure BWPs supported by each neighboring cell before cell handover to obtain a measurement report, where the measurement report at least may include measurement results of default BWPs of each neighboring cell; then, the UE sends the measurement report to the source cell, so that the source cell can determine a target cell according to the measurement report; then, the UE receives a handover command sent by the source cell, where the handover command includes a default BWP of the target cell and configuration information associated with a service BWP of the target cell, and since the UE already knows the configuration information associated with the service BWP of the target cell before cell handover is completed, the UE can measure the service BWP supported by the target cell in advance to obtain a measurement result of the service BWP; finally, when performing cell handover, the UE may access the target cell according to the default BWP of the target cell, and determine an actually used service BWP according to the configuration information, so as to continue data transmission using the actually used service BWP. Through the cell switching scheme provided by the embodiment of the invention, the UE can measure the measurement result of the service BWP supported by the target cell as early as possible, realize that the UE is switched from the source cell to the target cell, and quickly adopt the service BWP to transmit data after being switched to the target cell, so as to reduce the transmission time of adopting the default BWP by the UE as far as possible, thereby improving the service transmission rate.

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 illustrating a cell switching method according to an embodiment of the present invention, where the cell switching method may be applied to a user equipment side. Before the UE is handed over from the source cell to the target cell, the UE performs data transmission with the source cell (i.e., serving cell). Specifically, before the UE performs data transmission with a source cell, the UE first initiates a random access procedure on a default BWP of the source cell to establish a Radio Resource Control (RRC) connection and enter a connection state; then, the UE reports the bandwidth capability to the source cell in a connection state; then, measuring the service BWP supported by the source cell according to the measurement control information of the service BWP sent by the source cell to the UE, to obtain the measurement result of the service BWP supported by the source cell; then, reporting the measurement result to the source cell, and the source cell configuring a service BWP for the UE according to the measurement result; and finally, the UE transmits data with the source cell on the configured service BWP.

If the channel quality of the UE and the source cell deteriorates and becomes worse during data transmission, and it is found that the channel quality of the UE and a certain neighboring cell is better than that of the source cell, the source cell may use the neighboring cell as a target cell and switch the UE to the target cell.

Specifically, as shown in fig. 1, in this embodiment, the cell switching method may include the following steps:

step S101: receiving measurement control information sent by a source cell, wherein the measurement control information comprises information of BWPs supported by each neighbor cell, and the BWPs comprise default BWPs and service BWPs;

step S102: measuring the BWP of each neighbor cell according to the measurement control information to obtain a measurement report, wherein the measurement report at least comprises the measurement result of the default BWP of each neighbor cell;

step S103: sending the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report;

step S104: receiving a handover command sent by the source cell, the handover command including a default BWP of the target cell and configuration information associated with a serving BWP of the target cell;

step S105: accessing the target cell according to the default BWP of the target cell, and determining an actually adopted service BWP according to the configuration information, so as to continue service transmission by using the actually adopted service BWP.

More specifically, in step S101, the UE may receive measurement control information sent by a source cell to the UE from the source cell, where the measurement control information may include information of BWPs supported by each neighbor cell adjacent to the source cell, and the BWP information may include a default BWP and a service BWP, that is, time-frequency location information of the default BWP and the service BWP supported by each neighbor cell.

Further, in step S102, the UE may measure the BWP supported by each neighboring cell according to the received network measurement control information, that is, perform BWP level measurement, to obtain a measurement report. The measurement report may include at least measurement results of default BWPs supported by respective neighbor cells. Specifically, since the source cell may not be synchronized with the neighbor cells, the source cell may transmit a default BWP supported by each neighbor cell including a synchronization signal block (synchronization block) to the UE before transmitting the measurement control information. If the UE receives the information of the default BWPs supported by the neighboring cell, the UE may preferentially measure each default BWP, thereby not only completing network synchronization between the UE and each neighboring cell, but also obtaining the measurement result of each default BWP. After network synchronization, the UE may continue to measure the service BWP supported by each neighbor cell.

Further, in step S103, the UE may send the measurement report to the source cell. The source cell may determine a target cell according to the measurement result of each neighboring cell included in the measurement report, so as to handover the UE to the target cell. The measurement report may be reported to a network (also referred to as a source cell) according to an existing Long Term Evolution (LTE) technology. LTE technology may employ a periodic mechanism to send measurement reports and an event-triggered mechanism to send measurement reports. Typically, the measurement report is reported to the network by the UE based on an event trigger mechanism. Once the measurement result meets the event triggering condition (for example, the signal strength of the neighboring cell is higher than the preset threshold and the source cell is lower than the preset threshold), the UE is triggered to report the measurement report, so that the network determines the target cell according to the measurement report.

Further, in step S104, the UE may receive a handover command from the source cell to handover to the target cell. The handover command may include a default BWP of the target cell so that the UE may access the target cell based on the default BWP. The handover command may further include configuration information associated with a traffic BWP of the target cell. The configuration information helps the UE to obtain the actually used service BWP to prepare for service transmission after handover to the target cell. It should be noted that, in the embodiment of the present invention, when the UE knows the default BWP of the target cell, the handover command may not include the default BWP.

Further, in step S105, the UE may access the target cell by initiating a random access procedure on a default BWP of the target cell. The random access process may adopt a non-conflicting access mode or a conflicting access mode. Once the service BWP adopted after the handover is determined according to the configuration information associated with the service BWP, the UE may be enabled to continue transmitting data based on the service BWP after the handover is completed. However, before data transmission is performed on the service BWP, the target cell is required to send the activation information of the service BWP to the UE. The activation Information may be notified to the UE through Downlink Control Information (DCI). The DCI information may be placed in a random access response or a collision resolution message according to an access mode of the UE. If the access mode is a non-conflicting access mode, the DCI information for activating the service BWP is included in a random access response message; and if the access mode is the conflicting access mode, the DCI information for activating the service BWP is included in a conflict resolution message.

Further, if the measurement report sent by the UE to the source cell is a measurement result of the default BWP of each neighbor cell and does not include the service BWP of each neighbor cell, the configuration information associated with the service BWP may include the default BWP of the target cell and the measurement control information of each service BWP.

In one non-limiting embodiment, referring to fig. 2, if the UE receives measurement control information for each traffic BWP, step S105 shown in fig. 1 may include the following steps:

step S1051: after receiving the handover command sent by the source cell, performing measurement according to the measurement control information of each service BWP to obtain a measurement result of each service BWP;

step S1052: transmitting a measurement result of each traffic BWP to the target cell;

step S1053: receiving an actually adopted service BWP configured by the target cell, the actually adopted service BWP being determined by the target cell according to a measurement result of each service BWP.

Specifically, in step S1051, the UE receives a handover command from the source cell, and if the handover command includes measurement control information of each service BWP of the target cell, after receiving the handover command, the UE will attempt to measure each service BWP of the target cell based on the measurement gap configured by the source cell to obtain a measurement result of each service BWP.

Further, if the UE completes measurement of the service BWP before sending a handover complete message, the measurement result of each service BWP may be carried in the handover complete message. In step S1052, the UE puts the obtained measurement result of each service BWP into a handover complete message and sends the handover complete message to the target cell.

Further, in step S1053, if the UE carries the measurement result of all the services BWPs of the target cell in the handover complete message, after the UE accesses the target cell, the target cell may configure the actually used services BWP for the UE according to the measurement result. After the UE receives the actually adopted traffic BWP configured by the UE from the target cell, the UE may transmit data with the target cell on the traffic BWP.

Further, those skilled in the art understand that, during the handover procedure, the UE may not obtain the measurement result of all services BWPs supported by the target cell due to insufficient measurement gaps or insufficient measurement time. Under this condition, if the UE carries the measurement result of the partial service BWP in the handover complete message, after the UE accesses to the target cell, the target cell may configure a measurement gap for the UE, and increase the measurement priority of the service BWP for which no measurement result is obtained, so that the UE preferentially measures the service BWP for which no measurement result is obtained, and reports the measurement result after obtaining the measurement result, so that the target cell can quickly determine the service BWP for transmitting data for the UE. It should be noted that, the existing LTE technology may report the measurement report after the event trigger threshold is met, but the scheme of the embodiment of the present invention may be different from the measurement reporting manner of the existing LTE, for example, the UE may report the relevant measurement result after the measurement of all the service BWPs is completed without meeting the event trigger threshold or considering the size of the measurement value.

According to the above, if the UE fails to obtain the measurement result of the service BWP supported by the target cell within the time period from the reception of the handover command to the transmission of the handover complete message, the UE may preferentially measure each service BWP supported by the target cell after accessing the target cell, and allocate the service BWP to the UE after obtaining the measurement result, so that the UE may transmit data with the target cell on the service BWP.

Further, if the UE has completed the measurement of the default BWP and the service BWP supported by each neighboring cell before initiating the handover, that is, the measurement report sent by the UE to the source cell includes the measurement result of the default BWP and the service BWP of each neighboring cell, after the source cell determines the target cell, the target cell determines the service BWP supporting the UE for data transmission according to the measurement report, and the source cell sends the service BWP that is actually used and the default BWP of the target cell and the service BWP that is carried by the handover command to the UE. That is, the configuration information associated with the service BWP involved in step S104 includes the default BWP of the target cell and the actually adopted service BWP.

Fig. 3 is a flowchart illustrating a cell handover method according to another embodiment of the present invention. In this embodiment, an operation flow of the cell handover method is described from a network side. Specifically, as shown in fig. 3, the cell handover method according to the embodiment of the present invention may include the following steps:

step S301: sending measurement control information to a user equipment, wherein the measurement control information comprises information of BWPs supported by each neighbor cell, and the BWPs comprise default BWPs and service BWPs;

step S302: receiving a measurement report of BWP of each neighbor cell from the user equipment, determining a target cell according to the measurement report, and sending the measurement report to the target cell, wherein the measurement report at least comprises a measurement result of default BWP of each neighbor cell;

step S303: receiving a default BWP configured by the target cell and configuration information associated with a serving BWP;

step S304: and sending a handover command to the user equipment, wherein the handover command includes the default BWP of the target cell and configuration information associated with the service BWP of the target cell, so that the user equipment accesses the target cell according to the default BWP of the target cell and determines the actually adopted service BWP according to the configuration information.

Specifically, in step S301, a source cell transmits measurement control information to a user equipment (i.e., UE) so that the UE can measure information of BWP supported by each neighbor cell over a measurement gap configured by the source cell. The BWP may include a default BWP and a traffic BWP.

Further, the UE may complete measurement and upload a measurement report after knowing the time-frequency location information of the default BWP and the service BWP. In step S302, the source cell may learn the measurement result of each neighbor cell from the measurement report of BWP received by the UE. The source cell may determine a target cell from the measurement result. Considering that the source cell may not be synchronized with its neighbor cells, the source cell may require the UE to perform measurement of the service BWP after completing measurement of the default BWP of each neighbor cell in order to complete network synchronization of the UE with each neighbor cell. Further, to implement network synchronization, the source cell may further send, to the UE, a default BWP supported by each neighboring cell including a synchronization signal block (synchronization signal block) before sending measurement control information.

Further, after the source cell determines a target cell, the measurement report (e.g., the measurement report including the measurement result associated with the target cell) may be sent to the target cell, causing the target cell to complete configuring default BWP and configuration information associated with the target cell's traffic BWP. It should be noted that, in the embodiment of the present invention, when the network (e.g., the source cell or the target cell) determines that the UE knows the default BWP of the target cell, the handover command may not include the default BWP.

Further, in step S303, the source cell receives the default BWP configured by the source cell and the configuration information associated with the service BWP from the target cell, and adds the configuration information to the handover command. If the measurement report is a measurement result of the default BWP of each neighbor cell of the source cell, the target cell may determine that configuration information associated with a traffic BWP includes the default BWP of the target cell and measurement control information of the traffic BWP according to the measurement report. If the measurement report includes both the measurement result of the default BWP of each neighbor cell and the measurement result of each service BWP, the configuration information associated with the service BWP may include the default BWP of the target cell and the service BWP actually used after handover determined for the UE.

Further, in step S304, the source cell sends a handover command carrying the default BWP of the target cell and configuration information associated with the serving BWP of the target cell to the UE, so that the UE can access the target cell according to the default BWP of the target cell.

In a specific implementation, if a service BWP is carried in the handover command, the UE may perform data transmission on the service BWP after accessing the target cell and receiving activation information of the service BWP (for example, the activation information may be included in DCI).

Further, if the handover command carries measurement control information of each service BWP of the target cell, the UE may measure each service BWP after receiving the handover command, and may send a relevant measurement result to the target cell through a handover complete message, and the target cell determines the actually used service BWP according to the measurement result.

Further, if the UE still has a service BWP for which a measurement result is not obtained, after the UE accesses to the target cell, the target cell may configure a measurement gap for the UE and increase the measurement priority of the service BWP for which a measurement result is not obtained, so that the UE preferentially measures the service BWP for which a measurement result is not obtained, and reports the measurement result to a network (that is, the target cell) after obtaining the measurement result, so that the target cell can quickly determine the service BWP for the UE to complete data transmission.

Further, if the UE fails to obtain a measurement result within a time period from the reception of the handover command to the transmission of the handover complete message, after the UE accesses the target cell, the target cell configures a measurement gap for each service BWP supported by the target cell, and may increase a measurement priority for each service BWP, so that the UE may preferentially measure each service BWP, and after obtaining the measurement result, quickly determine the service BWP for the UE to complete data transmission.

Those skilled in the art understand that the steps S301 to S304 can be regarded as corresponding execution steps of the steps S101 to S105 in the above-mentioned embodiment shown in fig. 1, and they are complementary in terms of specific implementation principle and logic. Therefore, reference may be made to the related description of the embodiments shown in fig. 1 and fig. 2 for the cell handover method on the network side, and details are not repeated here.

Therefore, with the technical solution of the embodiment of the present invention, after the UE is handed over to the target cell, the UE can quickly transfer the data from the default BWP to the service BWP for data transmission, so as to shorten the transmission time of the data on the default BWP due to the handover, achieve service continuity, and greatly shorten the time for transmitting the data on the default BWP, thereby improving the data transmission rate.

Fig. 4 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention, where the cell switching apparatus 4 may be used on a user equipment side. The cell switching apparatus 4 may include a second receiving module 42, a measuring module 43, a first transmitting module 44, a third receiving module 45 and a determining module 46.

In a specific implementation, the second receiving module 42 is adapted to receive measurement control information sent by the source cell, where the measurement control information includes information of BWPs supported by each neighboring cell, and the BWPs include a default BWP and a service BWP; the measurement module 43 is adapted to measure the BWP of each neighbor cell according to the measurement control information to obtain a measurement report, wherein the measurement report at least comprises the measurement result of the default BWP of each neighbor cell; the first sending module 44 is adapted to send the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report; the third receiving module 45 is adapted to receive a handover command sent by the source cell, the handover command including a default BWP of the target cell and configuration information associated with a traffic BWP of the target cell; the determining module 46 is adapted to access the target cell according to the default BWP and determine an actually adopted service BWP according to the configuration information, so as to continue service transmission using the actually adopted service BWP.

Further, if the measurement report is a measurement result of the default BWP of each neighbor cell, the configuration information associated with the service BWP includes the default BWP of the target cell and measurement control information of the respective service BWPs.

Further, the determining module 46 may include: a measurement sub-module 461, a first transmit sub-module 462, and a first receive sub-module 463.

Specifically, the measurement sub-module 461 is adapted to, after receiving the handover command sent by the source cell, perform measurement according to the measurement control information of each service BWP, so as to expect a measurement result of each service BWP; the first sending submodule 462 is adapted to send the measurement result of each traffic BWP to the target cell; the first receiving sub-module 463 is adapted to receive an actually adopted traffic BWP configured by the target cell, which is determined by the target cell based on the measurement result of each traffic BWP.

Further, the determining module 46 further includes a second sending submodule 464. The second sending submodule 464 is adapted to send a handover complete message to the target cell after accessing the target cell, and carry the measurement result of the completed service BWP in the handover complete message.

Further, the determination module 46 may also include a measurement transmission sub-module 465. If the measurement of the entire service BWP is not completed when the handover complete message is transmitted, the measurement transmission sub-module 465 is adapted to preferentially perform the measurement of the service BWP for which the measurement result is not obtained after accessing the target cell and to transmit the obtained measurement result to the target cell when the measurement is completed.

Further, the measurement transmission submodule 465 may include a receiving unit 4651 and a measuring unit 4652. The receiving unit 4651 is adapted to receive a measurement gap transmitted by the target cell; the measurement unit is adapted to perform a measurement of the unmeasured traffic BWP according to the measurement gap.

Further, if the measurement report is a measurement result of a default BWP and a traffic BWP of each neighbor cell, the configuration information associated with the traffic BWP includes the default BWP of the target cell and the actually-used traffic BWP, which is determined by the target cell according to the measurement report.

Further, the determining module 46 further includes a second receiving submodule 466. The second receiving sub-module 466 is adapted to receive downlink control indication information, which is sent by the target cell to activate the service BWP, before the service transmission is continued by using the actually used service BWP.

Further, the downlink control indication information of the service BWP is included in a random access response or a collision resolution message.

Further, if the access mode is a non-conflicting access mode, the downlink control indication information of the service BWP is included in the random access response message; if the access mode is a conflicting access mode, the downlink control indication information of the service BWP is included in a conflict resolution message.

Further, the cell switching apparatus 4 further includes a first receiving module 41. The first receiving module 41 is adapted to receive the notification indicating the default BWP of each neighbor cell sent by the source cell before the measurement control information sent by the source cell is received.

For more details of the operation principle and the operation mode of the cell switching device 4, reference may be made to the related description in fig. 1 and fig. 2, and details are not repeated here.

Fig. 5 is a schematic structural diagram of another cell switching apparatus according to an embodiment of the present invention. The cell switching apparatus 5 may be used on a network side, and those skilled in the art understand that the cell switching apparatus 5 according to the embodiment of the present invention may be used to implement the technical solution of the cell switching method in the embodiment shown in fig. 3. Specifically, in this embodiment, the cell switching apparatus 5 may include: a third transmitting module 52, a fourth receiving module 53, a fifth receiving module 54 and a transmission determining module 55.

In particular, the third sending module 52 is adapted to send measurement control information to the user equipment, where the measurement control information may include information of BWPs supported by each neighbor cell, and the BWPs include a default BWP and a traffic BWP; the fourth receiving module 53 is adapted to receive a measurement report of BWP of each neighbor cell from the user equipment, determine a target cell according to the measurement report, and send the measurement report to the target cell, wherein the measurement report at least comprises measurement results of default BWP of each neighbor cell; the fifth receiving module 54 is adapted to receive a default BWP configured for the target cell and configuration information associated with a serving BWP; the sending determining module 55 is adapted to send a handover command to the user equipment, the handover command including the default BWP of the target cell and configuration information associated with the traffic BWP of the target cell, so that the user equipment accesses the target cell according to the default BWP of the target cell and determines an actually adopted traffic BWP according to the configuration information.

Further, if the measurement report is a measurement result of the default BWP of each neighbor cell, the configuration information associated with the traffic BWP may include the default BWP of the target cell and measurement control information of the traffic BWP.

Further, the cell switching apparatus 5 may further include a second sending module 51. Before sending the measurement control information, the second sending module 51 is adapted to send a notification to the user equipment indicating the default BWP of each neighbor cell.

For more details of the operation principle and the operation mode of the cell switching device 5, reference may be made to the related description in fig. 3, which is not described herein again.

The signaling interaction between the user equipment and the network (including the source cell, each neighbor cell, and the target cell) using the embodiments of the present invention is further described below with reference to a typical application scenario.

Referring to fig. 6, in particular, in a typical application scenario, the user equipment 1 performs operation s0 with the source cell 2 in the network, i.e. data transmission is performed on a service BWP supported by the source cell 2.

Further, during the data transmission process, the source cell 2 may perform operation s1 with each neighboring cell (i.e., neighboring cell 1, neighboring cell 2, …, neighboring cell N) in the network, perform information interaction, and obtain information of BWPs supported by each neighboring cell, where the BWPs may include a default BWP and a service BWP.

Further, the source cell 2 may perform operation s2, and send measurement control information carrying the default BWP and the service BWP supported by each neighbor cell to the user equipment 1. The user equipment 1 performs operation s3 according to the measurement control information, and measures BWPs supported by each neighbor cell to obtain a measurement report.

Further, the user equipment 1 performs operation s4, and sends the measurement report to the source cell 2, where the measurement report only contains the measurement result of the default BWP of each neighboring cell. After the source cell 2 receives the measurement results of the default BWP of each neighbor cell, operation s5 is performed, i.e., a target cell (e.g., target cell 3) is determined.

Further, the source cell 2 performs operation s6 to forward a measurement report (e.g., measurement results of default BWP supported by the target cell 3) to the target cell 3. After receiving the measurement result, the target cell 3 performs operation s7, and sends the measurement control information of the default BWP and each service BWP supported by the target cell 3 to the source cell 2. The source cell 2 performs operation s8, adds the measurement control information of the service BWPs and the default BWP received from the target cell 3 to a handover command, and transmits the handover command to the user equipment 1.

Further, the user equipment 1 performs operation s9 after receiving the handover command, that is, attempts to measure the respective service BWPs of the target cell 3 in the measurement gap configured by the source cell 1 to obtain the measurement result of each service BWP. And, the user equipment 1 performs operation s10, i.e. initiates a random access procedure to access the target cell 3, based on the default BWP supported by the target cell 3.

Further, if the measurement result of each service BWP is obtained by performing operation s9, after the user equipment 1 accesses to the target cell 3, the user equipment 1 performs operation s11, adds the measurement result to a handover complete message, and sends the handover complete message to the target cell 3. Thereafter, the user equipment 1 and the target cell 3 perform operation s12, that is, the target cell configures the actually adopted service BWP for the user equipment 1 according to the measurement result and activates the service BWP, so that the user equipment 1 transmits data on the service BWP.

Further, if the measurement result of the partial service BWP is obtained by performing operation s9, the user equipment 1 performs operation s 11', adds the measurement result to a handover complete message, and transmits the handover complete message to the target cell 3. Then, the user equipment 1 and the target cell 3 execute operation s 12', which specifically includes: after the ue 1 accesses the target cell 3, the target cell 3 first sends measurement control information of a service BWP for which a measurement result is not obtained to the ue 1, and then the ue 1 performs measurement and reports the measurement result, so that the target cell 3 can allocate the service BWP to the ue 1 according to the measurement result and activate the service BWP, thereby enabling the ue 1 to transmit data on the service BWP.

Further, if the measurement result is not obtained by performing operation s9, the user equipment 1 performs operation s11 ″ after accessing to the target cell 3, and transmits a handover complete message to the target cell 3. Then, the user equipment 1 and the target cell 3 execute operation s12 ″, which specifically includes: after the ue 1 accesses the target cell 3, the target cell 3 first sends measurement control information of each service BWP supported by the target cell 3 to the ue 1, and then the ue 1 performs measurement and reports a measurement result, and the target cell 3 allocates and activates the service BWP to the ue 1 according to the measurement result, so that the ue 1 transmits data on the service BWP.

Referring to fig. 7, in yet another typical application scenario, the user equipment 1 may perform operation s 0' with a source cell 2 in the network, i.e. data transmission on a service BWP supported by the source cell 2.

Further, in the data transmission process, the source cell 2 may perform operation s 1' with each neighboring cell (i.e., neighboring cell 1, neighboring cell 2, …, neighboring cell N) of the network to perform information interaction, and obtain information of BWPs supported by each neighboring cell, where the BWPs include a default BWP and a service BWP.

Further, the source cell 2 may perform operation s 2', and send measurement control information carrying the default BWP and the service BWP supported by each neighbor cell to the user equipment 1. Thereafter, the user equipment 1 may perform operation s 3' according to the measurement control information to measure BWP of each neighbor cell, resulting in a measurement report.

Further, the user equipment 1 performs operation s 4', and sends the measurement report to the source cell 2, where the measurement report includes measurement results of the default BWP and the traffic BWP of each neighbor cell. The source cell 2 receives the measurement results of the default BWP and the service BWP of each neighbor cell, and then performs operation s 5', i.e., determines a target cell (e.g., target cell 3).

Further, the source cell 2 performs operation s 6', and forwards the measurement report to the target cell 3, such as the measurement results of the default BWP supported by the target cell 3 and the respective service BWPs. After receiving the measurement result, the target cell 3 performs operation s 7', and sends the default BWP and the service BWP supported by the target cell 3 (i.e. the service BWP allocated to the user equipment 1) to the source cell 2.

Further, the source cell 2 performs operation s 8', and sends a handover command carrying the default BWP and the service BWP of the target cell 3 to the user equipment 1. The user equipment 1 performs operation s 9' with the target cell 3, the user equipment 1 initiates a random access procedure to access the target cell 3, and the target cell 3 activates the service BWP, so that the user equipment 1 transmits data on the service BWP.

For more contents of the working principles and working modes of the user equipment 1, the source cell 2, and the target cell 3 in the application scenarios shown in fig. 6 and fig. 7, reference may be made to the related descriptions in fig. 1 to fig. 3 together, and details are not repeated here.

Further, the embodiment of the present invention further discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method technical solution described in the embodiments shown in fig. 1 to fig. 3 is executed. Preferably, the storage medium may include a computer-readable storage medium. The storage medium may include ROM, RAM, magnetic or optical disks, etc.

Further, an embodiment of the present invention further discloses a user equipment, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and when the processor runs the computer instruction, the technical solution of the cell handover method in the embodiments shown in fig. 1 and fig. 2 is executed.

Further, an embodiment of the present invention further discloses a network device, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and the processor executes the technical solution of the cell handover method in the embodiment shown in fig. 3 when executing the computer instruction. Preferably, the network device may interact with the user device.

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 of cell handover, comprising:

receiving measurement control information sent by a source cell, wherein the measurement control information comprises information of BWPs supported by each neighbor cell, and the BWPs comprise default BWPs and service BWPs;

measuring the BWP of each neighbor cell according to the measurement control information to obtain a measurement report, wherein the measurement report at least comprises the measurement result of the default BWP of each neighbor cell;

sending the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report;

receiving a handover command sent by the source cell, the handover command including a default BWP of the target cell and configuration information associated with a serving BWP of the target cell;

accessing the target cell according to the default BWP of the target cell, and determining the actually adopted service BWP according to the configuration information so as to continue service transmission by using the actually adopted service BWP;

wherein the handover command is sent by the source cell to the target cell, and is sent to the user equipment after receiving the default BWP configured by the target cell and the configuration information associated with the serving BWP.

2. The cell handover method according to claim 1, wherein if the measurement report is a measurement result of a default BWP of each neighbor cell, the configuration information associated with the traffic BWP comprises the default BWP of the target cell and measurement control information of each traffic BWP.

3. The cell switching method according to claim 2, wherein the step of determining an actually adopted service BWP according to the configuration information comprises:

after receiving the handover command sent by the source cell, performing measurement according to the measurement control information of each service BWP to obtain a measurement result of each service BWP;

transmitting a measurement result of each traffic BWP to the target cell;

receiving an actually adopted service BWP configured by the target cell, the actually adopted service BWP being determined by the target cell according to a measurement result of each service BWP.

4. The cell switching method according to claim 3, further comprising: and sending a handover completion message to the target cell after accessing the target cell, wherein the handover completion message carries a measurement result of the completed service BWP.

5. The cell switching method according to claim 4, further comprising: if the measurement of all the service BWPs is not completed when the handover complete message is sent, after accessing the target cell, the measurement of the service BWPs for which measurement results are not obtained is preferentially performed, and when the measurement is completed, the obtained measurement results are sent to the target cell.

6. The cell switching method according to claim 5, wherein the prioritizing the measurement of the unmeasured traffic BWP comprises: receiving a measurement gap sent by the target cell; and measuring the service BWP without the measurement result according to the measurement gap.

7. The cell handover method according to claim 1, wherein if the measurement report is a measurement result of a default BWP and a traffic BWP of each neighbor cell, the configuration information associated with the traffic BWP comprises the default BWP of the target cell and the actually adopted traffic BWP, and the actually adopted traffic BWP is determined by the target cell according to the measurement report.

8. The cell switching method according to claim 1, wherein the downlink control indication information for activating the service BWP sent by the target cell is received before the service transmission is continued by using the actually used service BWP.

9. The cell switching method according to claim 8, wherein the downlink control indication information of the service BWP is included in a random access response or a collision resolution message.

10. The cell switching method according to claim 9, wherein if the access mode is a non-conflicting access mode, the downlink control indication information of the service BWP is included in a random access response message; if the access mode is a conflicting access mode, the downlink control indication information of the service BWP is included in a conflict resolution message.

11. The cell switching method according to any one of claims 1 to 10, wherein the notification indicating the default BWP of each neighbor cell transmitted by the source cell is received before the reception of the measurement control information transmitted by the source cell.

12. A method of cell handover, comprising:

sending measurement control information to a user equipment, wherein the measurement control information comprises information of BWPs supported by each neighbor cell, and the BWPs comprise default BWPs and service BWPs;

receiving a measurement report of BWP of each neighbor cell from the user equipment, determining a target cell according to the measurement report, and sending the measurement report to the target cell, wherein the measurement report at least comprises a measurement result of default BWP of each neighbor cell;

receiving a default BWP configured by the target cell and configuration information associated with a serving BWP;

and sending a handover command to the user equipment, wherein the handover command includes the default BWP of the target cell and configuration information associated with the service BWP of the target cell, so that the user equipment accesses the target cell according to the default BWP of the target cell and determines the actually adopted service BWP according to the configuration information.

13. The cell handover method according to claim 12, wherein if the measurement report is a measurement result of a default BWP of each neighbor cell, the configuration information associated with the traffic BWP comprises the default BWP of the target cell and measurement control information of the traffic BWP.

14. The cell handover method according to claim 12, wherein if the measurement report is a measurement result of a default BWP and a traffic BWP of each neighbor cell, the configuration information associated with the traffic BWP comprises the default BWP of the target cell and the actually adopted traffic BWP, and the actually adopted traffic BWP is determined by the target cell according to the measurement report.

15. The cell handover method according to any one of claims 12 to 14, wherein a notification indicating a default BWP of each neighbor cell is sent to the user equipment before the measurement control information is sent.

16. A cell switching apparatus, comprising:

a second receiving module, adapted to receive measurement control information sent by a source cell, where the measurement control information includes information of BWPs supported by each neighbor cell, and the BWPs include a default BWP and a service BWP;

a measurement module adapted to measure BWP of each neighbor cell according to the measurement control information to obtain a measurement report, the measurement report including at least measurement results of default BWP of each neighbor cell;

a first sending module, adapted to send the measurement report to the source cell, so that the source cell determines a target cell according to the measurement report;

a third receiving module, adapted to receive a handover command sent by the source cell, the handover command including a default BWP of the target cell and configuration information associated with a traffic BWP of the target cell;

a determining module, adapted to access the target cell according to the default BWP, and determine an actually adopted service BWP according to the configuration information, so as to continue service transmission using the actually adopted service BWP.

17. The cell handover apparatus of claim 16, wherein if the measurement report is a measurement result of a default BWP of each neighbor cell, the configuration information associated with the traffic BWP comprises the default BWP of the target cell and measurement control information of each traffic BWP.

18. The cell switching apparatus of claim 17, wherein the determining module comprises: a measurement sub-module, adapted to perform measurement according to measurement control information of each service BWP after receiving the handover command sent by the source cell, so as to expect a measurement result of each service BWP;

a first transmission sub-module adapted to transmit a measurement result of each traffic BWP to the target cell;

a first receiving sub-module adapted to receive an actually adopted traffic BWP configured by the target cell, the actually adopted traffic BWP being determined by the target cell based on a measurement result of each traffic BWP.

19. The cell switching apparatus of claim 18, wherein the determining module further comprises: and the second sending submodule is suitable for sending a handover completion message to the target cell after accessing the target cell, and the handover completion message carries the measurement result of the completed service BWP.

20. The cell switching apparatus of claim 19, wherein the determining module further comprises: a measurement sending sub-module, adapted to, if the measurement of all the traffic BWPs is not completed when the handover complete message is sent, preferentially perform the measurement of the traffic BWPs for which no measurement result is obtained after accessing the target cell, and send the obtained measurement result to the target cell when the measurement is completed.

21. The cell switching apparatus of claim 20, wherein the measurement transmission submodule comprises:

a receiving unit, adapted to receive the measurement gap sent by the target cell;

a measurement unit adapted to perform a measurement of the unmeasured traffic BWP according to the measurement gap.

22. The cell handover apparatus according to claim 16, wherein if the measurement report is a measurement result of a service BWP and a default BWP of each neighbor cell, the configuration information associated with the service BWP comprises the service BWP actually adopted and the default BWP of the target cell, and the service BWP actually adopted is determined by the target cell according to the measurement report.

23. The cell switching apparatus of claim 16, wherein the determining module further comprises: a second receiving sub-module, adapted to receive downlink control indication information, which is sent by the target cell and activates the service BWP, before the service transmission is continued by using the actually used service BWP.

24. The cell handover apparatus of claim 23, wherein the downlink control indication information of the service BWP is included in a random access response or a collision resolution message.

25. The cell switching apparatus of claim 24, wherein if the access mode is a non-conflicting access mode, the downlink control indication information of the service BWP is included in a random access response message; if the access mode is a conflicting access mode, the downlink control indication information of the service BWP is included in a conflict resolution message.

26. The cell switching apparatus according to any one of claims 16 to 25, further comprising a first receiving module adapted to receive a notification indicating the default BWP of each neighbor cell sent by the source cell before the receiving the measurement control information sent by the source cell.

27. A cell switching apparatus, comprising:

a third sending module, adapted to send measurement control information to the user equipment, the measurement control information including information of BWPs supported by each neighbor cell, the BWPs including a default BWP and a traffic BWP;

a fourth receiving module, adapted to receive a measurement report of BWP of each neighbor cell from the user equipment, determine a target cell according to the measurement report, and send the measurement report to the target cell, the measurement report including at least a measurement result of default BWP of each neighbor cell;

a fifth receiving module adapted to receive a default BWP configured for the target cell and configuration information associated with a serving BWP;

a sending determination module adapted to send a handover command to the user equipment, the handover command including a default BWP of the target cell and configuration information associated with a traffic BWP of the target cell, so that the user equipment accesses the target cell according to the default BWP of the target cell and determines an actually adopted traffic BWP according to the configuration information.

28. The cell handover apparatus of claim 27, wherein if the measurement report is a measurement result of a default BWP of each neighbor cell, the configuration information associated with the traffic BWP comprises the default BWP of the target cell and measurement control information of the traffic BWP.

29. The cell handover apparatus of claim 27, wherein if the measurement report is a measurement result of a service BWP and a default BWP of each neighbor cell, the configuration information associated with the service BWP comprises the service BWP actually adopted and the default BWP of the target cell, and the service BWP actually adopted is determined by the target cell according to the measurement report.

30. The cell switching apparatus according to any one of claims 27 to 29, further comprising:

a second sending module adapted to send a notification indicating a default BWP of each neighbor cell to the user equipment before sending the measurement control information.

31. A storage medium having stored thereon computer instructions, which when executed perform the steps of the cell handover method of any one of claims 1 to 11 or claims 12 to 15.

32. A user equipment comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the cell handover method of any one of claims 1 to 11.

33. A network device comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the cell handover method of any one of claims 12 to 15.