WO2020211778A1

WO2020211778A1 - Cell handover method and apparatus

Info

Publication number: WO2020211778A1
Application number: PCT/CN2020/084910
Authority: WO
Inventors: 黄曲芳
Original assignee: 华为技术有限公司
Priority date: 2019-04-18
Filing date: 2020-04-15
Publication date: 2020-10-22
Also published as: CN111836325A; CN111836325B

Abstract

Provided in the present application are a cell handover method and apparatus for use in a cell communication system comprising at least three types of cells, wherein a first type of cells support a first type of services and a second type of services, a second type of cells only support the first type of services, and a third type of cells only support the second type of services, the method comprising: a first network device controlling, according to access information of a terminal device and the type of a first target cell, the handover of the terminal device, wherein the access information of the terminal device comprises the type of services currently accessed by the terminal device and/or the type of cells currently accessed by the terminal device. The technical solution can satisfy the requirement for services of a terminal device during a cell handover.

Description

Cell switching method and device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 18, 2019, the application number is 201910313304.6, and the application name is "Cell Handover Method and Device", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communications, and more specifically, to a cell handover method and device.

Background technique

With the penetration of wireless communication into industrial automation production, wireless communication is increasingly used in industrial production, which can partially replace the existing wired transmission in industrial control, reduce the demand for wiring for wired transmission, and organize production lines flexibly.

Because of the openness of wireless transmission, anyone can receive wireless signals. Therefore, when wireless transmission is applied to industrial control, it is necessary to ensure safety, strictly control users who access industrial control wireless systems, and separate them from public wireless networks. The concept of "industrial private network" was introduced. Two types of industrial control cells are defined in the current standard, a type cell (type-a cell) and a type b cell (type-b cell). Among them, the terminal equipment can access the industrial control system through a type cell, and can also access the public wireless communication network. When a terminal device moves between a type a cell and a public wireless network cell, it is necessary to ensure the continuity of the service of the terminal device. The terminal equipment can access the industrial control system through the b-type cell, but the terminal equipment cannot access the public wireless communication network through the cell of the second cell type. When the terminal device moves between the cell of the second cell type and the cell of the public wireless network, there is no need to ensure the service continuity of the terminal device.

When the service type accessed by the terminal device in the cell currently accessed is inconsistent with the service type accessed by the terminal device in the cell to be accessed, the terminal device cannot guarantee the continuity of private network services or public network services.

Summary of the invention

The present application provides a cell handover method and device, which can meet the business needs of the terminal equipment when the terminal equipment performs cell handover.

In a first aspect, a cell handover method is provided, which is executed in a communication system including cells of at least three cell types, wherein the cells of the first cell type can support the services of the first service type and the services of the second service type. , The cell of the second cell type only supports the services of the first service type, and the cell of the third cell type only supports the services of the second service type, including: the first network device according to the access information of the terminal device and the first target cell The type of the terminal device controls the handover of the terminal device, where the access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device.

The first network device controls the handover of the terminal device according to the service type supported by the first target cell and the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device, so as to better satisfy Business requirements for terminal equipment.

With reference to the first aspect, in some implementation manners of the first aspect, the first service type is a private network service, and the second service type is a public network service.

Wherein, the private network service is a service accessed by the terminal device which can only be transmitted in the private network.

Optionally, the private network service includes a production service.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first network device acquiring first information, where the first information is used to indicate a cell to be handed over in the terminal device If the service of the second service type is not supported, the terminal device suspends the service of the second service type.

By acquiring the first information, the first network device can suspend the service of the second service type when the cell to be handed over by the terminal device does not support the service of the second service type, thereby ensuring the service of the first service type. Continuity.

With reference to the first aspect, in some implementation manners of the first aspect, in the case that the first target cell does not support a cell of the second service type, the method further includes: the first network The device sends suspension request information to the core network device, where the suspension request information is used to request suspension of the service of the second service type of the terminal device.

With reference to the first aspect, in some implementations of the first aspect, the cell type of the cell currently accessed by the terminal device is the first cell type, the type of the first target cell is the second cell type, and When the service type of the service currently accessed by the terminal device includes the first service type and the second service type, the first network device controls the terminal device according to the access information of the terminal device and the type of the first target cell The handover of the terminal device includes: the first network device generates first handover information according to the access information of the terminal device and the type of the first target cell, and the first handover information is used to instruct the terminal The device switches the service of the first service type of the terminal device to the first target cell, and the first handover information includes an identifier of the first target cell and an identifier of the service of the first service type.

The first network device is the first service type according to the service type supported by the first target cell, and the service type of the service currently accessed by the terminal device includes the first service type and the second service type, and instructs the terminal device to set the first service type accordingly The service of the first service type is switched to the first target cell, thereby maintaining the continuity of the demand of the terminal equipment for the service of the first service type.

With reference to the first aspect, in some implementation manners of the first aspect, the first network device controlling the handover of the terminal device according to the access information of the terminal device and the type of the first target cell includes: The first network device controls the handover of the terminal device according to the access information of the terminal device, the type of the first target cell, and the type of the second target cell.

According to the service types supported by the two target cells and the service types accessed by the terminal equipment, the first network equipment can better meet the requirements of the terminal equipment for different services.

With reference to the first aspect, in some implementations of the first aspect, the cell type of the cell currently accessed by the terminal device is the first cell type, the type of the first target cell is the second cell type, In the case where the type of the second target cell is the third cell type and the service type of the service currently accessed by the terminal device includes the first service type and the second service type, the first network device is based on The access information of the terminal device, the type of the first target cell, and the type of the second target cell, and controlling the handover of the terminal device includes: the first network device according to the access information of the terminal device, The type of the first target cell and the type of the second target cell are used to generate second handover information, where the second handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device To the first target cell, the first handover information includes the identity of the first target cell and the identity of the service of the first service type; and/or the first network device according to the terminal device Access information, the type of the first target cell, and the type of the second target cell to generate third handover information, where the third handover information is used to instruct the terminal device to set the second The service of the service type is handed over to the second target cell, and the third handover information includes the identity of the second target cell and the identity of the service of the second service type.

According to the first network device, the service type supported by the first target cell is the first service type, the service type supported by the second target cell is the second service type, and the service type of the service currently accessed by the terminal device includes the first service type and the second service type. The second service type, which instructs the terminal equipment to switch the service of the first service type to the first target cell and the service of the second service type to the second target cell accordingly, so as to keep the terminal equipment’s service of the first service type and the second target cell. 2. The continuity of business needs of business types.

With reference to the first aspect, in some implementations of the first aspect, the cell currently accessed by the terminal device includes a third cell and a fourth cell, and the cell type of the third cell is the second cell type, The cell type of the fourth cell is the third cell type, the type of the first target cell is the first cell type, and the service type of the service currently accessed by the terminal device includes the first service type and the second service type. In the case of the second service type, the first network device controlling the handover of the terminal device according to the access information of the terminal device and the type of the first target cell includes: the first network device according to the terminal device The access information of the device and the type of the first target cell are used to generate fourth handover information, where the fourth handover information is used to instruct the terminal device to use the terminal device’s services and/or services of the first service type. The service of the second service type is handed over to the first target cell, and the fourth handover information includes the identity of the first target cell.

The first network device is the first service type and the second service type according to the service types supported by the first target cell, and the service type of the service currently accessed by the terminal device includes the first service type and the second service type, indicating that the terminal device corresponds Both the services of the first service type and the services of the second service type are switched to the first target cell, so as to maintain the continuity of the terminal equipment's requirements for the services of the first service type and the services of the second service type.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first network device receives the measurement information of the first target cell sent by the terminal device, and the first target The measurement information of the cell includes the identity of the first target cell and/or the service type supported by the first target cell.

The first network device can obtain the service type supported by the first target cell according to the measurement information of the first target cell, so that the terminal device can perform cell handover.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first network device receives second information sent by a second network device, and the second information is used to indicate the first A service type supported by a target cell, and the second network device is a network device of the first target cell.

The first network device can obtain the service type supported by the first target cell according to the second information sent by the network device of the first target cell, so that the terminal device can perform cell handover.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first network device receives the measurement information of the second target cell sent by the terminal device, and the second target The measurement information of the cell includes the identity of the second target cell and/or the service type supported by the second target cell.

The first network device can obtain the service type supported by the second target cell according to the measurement information of the second target cell, so that the terminal device can perform cell handover.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first network device receives third information sent by a third network device, and the third information is used to indicate the second 2. The service type supported by the target cell, and the third network device is the network device of the second target cell.

The first network device can obtain the service type supported by the second target cell according to the third information sent by the network device of the first target cell, so that the terminal device can perform cell handover.

With reference to the first aspect, in some implementations of the first aspect, the first network device acquiring first information includes: receiving, by the first network device, the first information sent by the terminal device; or, The first network device receives the first information sent by the operation, maintenance and management OAM.

With reference to the first aspect, in some implementations of the first aspect, the first network device receiving the first information sent by the terminal device includes: the first network device initiates a second For a service type of business, receive the first information sent by the terminal device; or the first network device receives the first information sent by the terminal device when the terminal device initiates a network connection; or The first network device receives the first information sent by the terminal device when the terminal device simultaneously initiates the service of the first service type and the service of the second service type.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first network device sends first handover request information to the second network device, and the first handover request information uses Instructing the terminal device to access the second network device, the first network device is the network device currently accessed by the terminal device, and the second network device is the network to be accessed by the terminal device Device; the first network device receives first handover response information sent by the second network device, and the first handover response information is used to indicate whether the terminal device can access the second network device.

The network device currently connected to the terminal device can know whether the terminal device can switch to the second network device according to the first switching response information sent by the network device to be accessed by the terminal device, so that the terminal device can switch to the second network device.

With reference to the first aspect, in some implementations of the first aspect, the first handover request information includes a first identifier and a second identifier, and the first identifier is assigned by the first network device to the terminal device The second identifier is the service type to be switched by the terminal device. The network device to be accessed by the terminal device can obtain which terminal device is the terminal device to be accessed according to the identifier assigned to the terminal by the first network device, and can know the type of service to be switched by the terminal device. So as to provide corresponding business requirements for the corresponding terminal equipment.

In a second aspect, a cell handover method is provided, which is executed in a communication system including cells of at least three cell types, wherein the cells of the first cell type can support the services of the first service type and the services of the second service type. , The cell of the second cell type only supports the services of the first service type, and the cell of the third cell type only supports the services of the second service type, including: the terminal device will use the terminal device’s Part or all services are switched, where the access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device.

The terminal device switches part or all of the services of the terminal device according to the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device, so as to better meet the service requirements of the terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the first service type is a private network service, and the second service type is a public network service.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the terminal device receives suspended service information sent by the core network device, and the suspended service information is used to request that the terminal When the cell that the device accesses does not support the service of the second service type, the terminal device suspends the service of the second service type, and the suspended service information includes the identifier of the service of the second service type .

When the cell to be accessed by the terminal device does not support the terminal device’s demand for services of the second service type, the terminal device needs to suspend the services of the second service type so that the terminal device can access the cell to be accessed to meet the requirements of the terminal The equipment's demand for services other than the second service type.

With reference to the second aspect, in some implementations of the second aspect, after the terminal device receives the suspended service information sent by the core network device, the method further includes: the terminal device converts the service type of the second service All transmission entities corresponding to the service are cleared.

In the case that the terminal device suspends the service of the second service type, the terminal device clears all the transmission entities corresponding to the service of the second service type, which can improve the utilization rate of resources.

With reference to the second aspect, in some implementations of the second aspect, the terminal device clearing all the transmission entities corresponding to the services of the second service type includes: the terminal device determines that the service of the second service type Whether the transmission entity corresponding to the service is the same as the transmission entity corresponding to the other service type; in the case that the transmission entity corresponding to the second service type is the same as the transmission entity corresponding to the other service type, The terminal device clears all the data corresponding to the service of the second service type buffered in the transmission entity corresponding to the service of the second service type, and removes the protocol data unit in the data convergence protocol PDCP corresponding to the service of other service types PDU is renumbered; in the case that the transmission entity corresponding to the second service type is different from the transmission entity corresponding to the other service type, the terminal device transmits the service corresponding to the second service type All the data buffered in the entity are cleared, and all the first parameters are reset. The first parameters include shared device access protocol SDAP parameters and/or PDCP parameters.

When the terminal device clears all the transmission entities corresponding to the services of the second service type, it needs to determine whether the transmission entities corresponding to the services of the second service type are the same as the transmission entities corresponding to the services of other service types, so as to realize the inconsistency with other services Types of business have an impact, which can increase resource utilization.

With reference to the second aspect, in some implementation manners of the second aspect, the terminal device switching part or all of the services of the terminal device according to the access information of the terminal device includes: the terminal device receives the First handover information sent by the first network device, where the first handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target cell, and the first handover The information includes the identity of the first target cell and the identity of the service of the first service type; the terminal device according to the access information of the terminal device and the first handover information, the terminal device currently visits The service of the first service type is switched to the first target cell.

With reference to the second aspect, in some implementation manners of the second aspect, the terminal device switching part or all of the services of the terminal device according to the access information of the terminal device includes: the terminal device receives the Second handover information sent by the first network device, where the second handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target cell, and the first 2. Handover information includes the identifier of the first target cell and the service identifier of the first service type; and/or the terminal device receives the third handover information sent by the first network device, and the third handover Information is used to instruct the terminal device to switch the service of the second service type of the terminal device to the second target cell, and the third handover information includes the identity of the second cell and the second target cell. The identifier of the service of the service type; the terminal device, according to the access information of the terminal device and the second switching information and/or the third switching information, converts the service of the first service type currently accessed by the terminal device Switching to the first target cell, and/or switching the service of the second service type currently accessed by the terminal device to the second target cell.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: at the first moment, the terminal device compares the access information of the terminal device and the second switching information to the The service of the first service type currently accessed by the terminal device is switched to the first target cell; at the second moment, the terminal device switches the terminal device to the access information of the terminal device and the third switching information The currently visited service of the second service type is handed over to the second target cell, and the second time is later than the first time; or the terminal device performs cell handover according to a preset rule, wherein The preset rule is that the terminal device receives the handover information first, and performs cell handover first.

The terminal device performs cell switching according to the time sequence of receiving the switching information or the preset rule, so that the terminal device can meet the priority cell switching and improve the continuity of the terminal device's demand for priority services.

With reference to the second aspect, in some implementation manners of the second aspect, the second handover information further includes a physical random access channel PRACH resource of the first target cell.

With reference to the second aspect, in some implementation manners of the second aspect, the third handover information further includes the PRACH resource of the second target cell.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the terminal device determines whether the terminal device successfully performs cell handover; In the case that the terminal device successfully accesses the cell of the service of the second service type, the terminal device measures other cell information until the terminal device successfully accesses and supports the cell A cell of a service of the first service type; when the terminal device successfully accesses a cell that supports a service of the first service type, and the terminal device does not successfully access a cell of a service of the second service type Next, the terminal device suspends the service of the second service type.

The terminal device judges whether the cell handover is successful, that is, whether the terminal device successfully accesses the cell that provides the corresponding service for the required service. In the case that the terminal device fails to access the cell supporting the service of the first service type, and the terminal device successfully accesses the cell of the service of the second service type, the terminal device needs to measure other cell information until the terminal device successfully accesses the support The cell of the service of the first service type, thereby realizing the continuity of the requirements of the terminal equipment for the service of the first service type and the service of the second service type. When the terminal device successfully accesses the cell supporting the service of the first service type, and the terminal device fails to access the cell of the service of the second service type, the terminal device suspends the service of the second service type , So as to realize the continuity of the terminal equipment's service requirements for the first service type. That is, the terminal device preferably needs to fulfill the needs of the first service type.

With reference to the second aspect, in some implementation manners of the second aspect, the terminal device switching part or all of the services of the terminal device according to the access information of the terminal device includes: the terminal device receives the The fourth handover information sent by the first network device, where the fourth handover information is used to instruct the terminal device to switch the service of the first service type and/or the service of the second service type of the terminal device To the first target cell, the fourth handover information includes the identity of the first target cell; the terminal device, according to the access information of the terminal device and the fourth handover information, sets the current The accessed services of the first service type and the services of the second service type are switched to the first target cell.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the terminal device sends the measurement information of the first target cell to the first network device, and the measurement information of the first target cell includes The identity of the first target cell and/or the service type supported by the first target cell.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the terminal device sends the measurement information of the second target cell to the first network device, and the second target cell The measurement information includes the identity of the second target cell and/or the service type supported by the second target cell.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the terminal device sends first information to the first network device, where the first information is used to indicate In the case that the cell to which the device is to be switched does not support the service of the second service type, the terminal device suspends the service of the second service type.

With reference to the second aspect, in some implementations of the second aspect, the sending of the first information by the terminal device to the first network device includes: when the terminal device initiates a service of the second service type, the terminal The device sends the first information to the first network device; or when the terminal device initiates a network connection, the terminal device sends the first information to the first network device; or the terminal device simultaneously initiates the first information In the case of the service of the service type and the service of the second service type, the terminal device sends the first information to the first network device.

In a third aspect, a communication device is provided, including various modules or units for executing the method in the first aspect or any one of the possible implementation manners of the first aspect.

In a fourth aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the foregoing first aspect or the method in any one of the possible implementation manners of the first aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In an implementation manner, the communication device is a first network device. When the communication device is the first network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in the first network device. When the communication device is a chip configured in the first network device, the communication interface may be an input/output interface.

In a fifth aspect, a communication device is provided, which includes various modules or units for executing the second aspect or the method in any one of the possible implementation manners of the second aspect.

In a sixth aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the foregoing second aspect or the method in any one of the possible implementation manners of the second aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In an implementation manner, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface.

In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

Optionally, the communication device in the foregoing third aspect or the fourth aspect is a terminal device; the communication device in the foregoing fifth aspect or the sixth aspect is a network device.

In a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the first aspect, the second aspect, and any possible implementation manner of the first aspect and the second aspect Method in.

In a specific implementation process, the foregoing processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In an eighth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, receive signals through a receiver, and transmit signals through a transmitter to execute the first aspect, the second aspect, and any one of the first and second aspects. Methods.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the setting mode of the memory and the processor.

It should be understood that the related data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of the processor receiving input capability information. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and receiver can be collectively referred to as a transceiver.

The processing device in the above eighth aspect may be a chip. The processor may be realized by hardware or software. When realized by hardware, the processor may be a logic circuit, integrated circuit, etc.; when realized by software, the processor may be a general-purpose processor. This is achieved by reading the software code stored in the memory, the memory may be integrated in the processor, may be located outside the processor, and exist independently.

In a ninth aspect, a computer program product is provided. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the first aspect and the first aspect. The method in the second aspect and any one of the possible implementation manners of the first aspect and the second aspect.

In a tenth aspect, a computer-readable medium is provided, and the computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned first and second aspects. The method in the second aspect and any one of the possible implementation manners of the first aspect and the second aspect.

In an eleventh aspect, a chip system is provided, including a processor, configured to execute the method in any one of the foregoing first aspect, second aspect, and any one of the first aspect and second aspect.

In a twelfth aspect, a communication system is provided, including the aforementioned terminal device and a first network device.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system 100 according to the method provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of service types supported by three cells related to an application embodiment.

Fig. 3 is a schematic flowchart of a cell handover method provided by an embodiment of the present application.

Fig. 4 is a schematic flowchart of another cell handover method provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of service comparison before and after cell handover of a terminal device provided by an embodiment of the present application.

FIG. 6 is a schematic flowchart of another cell handover method provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of service comparison before and after cell handover of another terminal device provided by an embodiment of the present application.

FIG. 8 is a schematic flowchart of another cell handover method provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of service comparison of another terminal device before and after cell handover according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the application.

FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of this application.

FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the application.

FIG. 13 is a schematic structural diagram of a first network device provided by an embodiment of this application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (NR), etc.

To facilitate the understanding of the embodiments of the present application, first, a communication system suitable for the method provided in the embodiments of the present application will be described in detail with reference to FIG. 1. FIG. 1 shows a schematic diagram of a communication system 100 applicable to the method provided in the embodiment of the present application. As shown in the figure, the communication system 100 may include at least one network device, such as a base station (gNB) in the 5G system as shown in FIG. 1; the communication system 100 may also include at least one terminal device, as shown in FIG. User equipment (UE) 1 to UE 6. The network device and each terminal device can communicate via wireless links. For example, the network device may send configuration information to the terminal device, and the terminal device may send uplink data to the network device based on the configuration information; for another example, the network device may send downlink data to the terminal device. Therefore, gNB and UE 1 to UE 6 in FIG. 1 can form a communication system.

The terminal devices in the communication system 100, such as UE 4 to UE 6, may also constitute a communication system. For example, UE 4 can control UE 5 and UE 6 to execute corresponding instructions. This application does not limit this.

The terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The terminal device can 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), and a wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be referred to as wearable smart devices. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

In addition, in the embodiments of this application, the terminal device may also be a terminal device in the Internet of Things (IoT) system. The IoT is an important part of the development of information technology in the future. Its main technical feature is to pass items through communication technology. Connect with the network to realize the intelligent network of human-machine interconnection and interconnection of things.

In the embodiments of the present application, the IOT technology can achieve massive connections, deep coverage, and power saving of terminals through, for example, narrowband NB technology. For example, the NB only includes one resource block (resource bloc, RB), that is, the bandwidth of the NB is only 180 KB. To achieve mass access, the terminals must be discrete in access. The communication method according to the embodiment of the present application can effectively solve the congestion problem of mass terminals of the IOT technology when accessing the network through the NB.

The network device in the embodiment of the application may be a device used to communicate with a terminal device. The network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future The network equipment in the 5G network or the network equipment in the PLMN network that will evolve in the future can be the access point (AP) in the WLAN, or the gNB in the new radio system (NR) system. This application The embodiment is not limited.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, DU implements wireless link The functions of radio link control (RLC), media access control (MAC) and physical (PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU , Or, sent by DU+CU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.

In addition, in the embodiments of the present application, the network equipment provides services for the cell, and the terminal equipment communicates with the network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The cell may be a network equipment. (E.g. base station) The corresponding cell, the cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: metro cell, micro cell, and pico cell (pico cell), femto cell (femto cell), etc., these small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

In addition, the carrier in the LTE system or the 5G system can have multiple cells working at the same frequency at the same time. In some special scenarios, the concept of the above-mentioned carrier and the cell can also be considered equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identification (Cell ID) of the secondary cell working on the secondary carrier will be carried at the same time. In this case, the concept of carrier and cell can be considered to be equivalent. For example, the UE accessing a carrier is equivalent to accessing a cell.

The core network device can be connected to multiple network devices for controlling the network device, and can distribute data received from the network side (for example, the Internet) to the network device.

Among them, the functions and specific implementations of the terminal equipment, network equipment, and core network equipment listed above are only exemplary descriptions, and the present application is not limited thereto.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application. For example, the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.

It should also be understood that FIG. 1 is only a simplified schematic diagram of an example for ease of understanding, and the communication system 100 may also include other network devices or other terminal devices, which are not shown in FIG. 1.

To facilitate the understanding of the embodiments of the present application, first, a brief description of several concepts involved in the following is given.

1. Public network services: services accessed through public wireless communication networks.

2. Private network service: A service accessed through the industrial control wireless system. This private network service can be used for the service requirements of some communication equipment in industrial production, and only authorized communication equipment can access the corresponding private network service.

For private network services, two types of industrial control cells are defined in the current standard:

The first cell type (for example, a type-a cell): The terminal device can access the industrial control system through the cell of the first cell type, and can also access the public wireless communication network. When a terminal device moves between a cell of the first cell type and a public wireless network cell, it is necessary to ensure the continuity of the service of the terminal device.

The second cell type (for example, a type-b cell): The terminal device can access the industrial control system through the cell of the second cell type, but the terminal device cannot access the public wireless communication network through the cell of the second cell type. When the terminal device moves between the cell of the second cell type and the cell of the public wireless network, there is no need to ensure the service continuity of the terminal device.

Combining public network services and private network services, there are three types of cells, namely, cells of the first cell type, cells of the second cell type, and public network cells. The service types that these three types of cells can access are shown in Figure 2. Among them, the terminal equipment needs to ensure the continuity of public network services when switching services between the services of the public network cell and the services of the first cell type cell; the terminal equipment is performing the services of the cell of the first cell type and When the services of the cells of the second cell type are switched, the continuity of the private network services needs to be ensured.

When a terminal device accesses a public network cell, the terminal device can be an industrial device, but the industrial device cannot access the private network service it needs in the public network cell, that is, the industrial device cannot be accessed in the public network cell The service; the terminal device can also be a user terminal device, whether the user device is a company employee or not, can access public network services in the public network community.

When a terminal device accesses a cell of the first cell type, the terminal device can be an industrial device, and the industrial device can access the private network service it needs in the cell of the first cell type, that is, the industrial device is in the first cell. Private network services can be accessed in a type of cell; the terminal device can also be a user terminal device. When the user device is a terminal device of a company employee, in the first cell type cell, the user device can access public network services Private network services can also be accessed; when the user equipment is not a terminal device of an employee of the company, in a cell of the first cell type, the user equipment can only access public network services if it is authorized.

When a terminal device accesses a cell of the second cell type, the terminal device may be an industrial device, and the industrial device can access the private network service it needs in the cell of the second cell type, that is, the industrial device is in the second cell. The type of cell can access private network services; the terminal device can also be a user terminal device. When the user device is a terminal device of a company employee, in the first cell type cell, the user device can only access the private network Business: When the user equipment is not a terminal device of an employee of the company, in a cell of the first cell type, even if the user equipment is authorized, the user equipment still has no services that can be accessed.

Therefore, there is an urgent need to provide a method that can ensure the continuity of the private network service or the public network service of the terminal device when the terminal device performs cell handover.

In order to facilitate the understanding of the embodiments of the present application, before introducing the embodiments of the present application, the following descriptions are made.

First, in the embodiment of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain piece of information (the first information as described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated. Instruction information, such as the information to be instructed itself or the index of the information to be instructed, etc. The information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, and other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to realize the indication of specific information by means of the pre-arranged order (for example, stipulated in the agreement) of various information, thereby reducing the indication overhead to a certain extent.

Second, in the embodiments shown below, the first, second, and various numerical numbers are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish different instructions or messages.

Third, the "protocol" involved in the embodiments of the present application may refer to standard protocols in the communication field, for example, may include LTE protocol, NR protocol, and related protocols applied to future communication systems, which are not limited in this application.

Fourth, the "plurality" referred to in the embodiments of the present application refers to two or more. "The following one (a) or multiple (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one or more of a, b, and c can represent: a, or b, or c, or a and b, or a and c, or b and c, or a , B and c, where a, b, c can be single or multiple.

Fifth, the pre-definition involved in the embodiments of the present application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing, or pre-fired.

The cell handover method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

It should be understood that the method provided in this application can be applied to a wireless communication system, for example, the wireless communication system 100 shown in FIG. 1. There is a wireless communication connection between two communication devices in the wireless communication system. One communication device of the two communication devices can correspond to any one of UE 1 to UE 6 shown in FIG. 1, for example, Any one of UE 1 to UE 6 in 1 may also be a chip configured in any one of UE 1 to UE 6; the other communication device of the two communication devices may correspond to the one shown in Figure 1 The shown gNB, for example, may be the gNB in FIG. 1, or may be a chip configured in the gNB.

Hereinafter, without loss of generality, the interaction between the terminal device and the network device is taken as an example to describe the embodiments of the present application in detail. It can be understood that any terminal device in the wireless communication system can communicate with one or more network devices having wireless communication connections based on the same method. This application does not limit this.

In the following, the implementation in a communication system including cells of at least three cell types is taken as an example. The cells of the first cell type can support the services of the first service type and the services of the second service type, and the cells of the second cell type Only the services of the first service type are supported, and the cells of the third cell type only support the services of the second service type. Among them, the first service type may be a private network service, and the second service type may be a public network service. FIG. 3 is a schematic flowchart of a cell handover method 300 according to an embodiment of the present application, shown from the perspective of device interaction. As shown in FIG. 3, the method may include step S330 and step S340. Optionally, the method may further include step S310 and step S320. The steps in the cell handover method 300 are described in detail below.

Optionally, in step S310, the terminal device generates cell measurement information.

Wherein, the cell measurement information may include measurement information of one or more cells. The cell measurement information includes the identities of one or more cells and/or service types supported by the one or more cells.

Optionally, in step S320, the terminal device sends the measurement information of the first target cell to the first network device. The measurement information of the first target cell includes the identity of the first target cell and/or the service type supported by the first target cell.

The first network device may be the network device where the terminal device currently accesses the cell.

The first target cell may be a cell to be accessed by the terminal device, and the reference signal receiving power (RSRP) of the first target cell is higher than a first threshold. Wherein, the first threshold may be preset, and the first threshold may be set according to the frequency of the first target cell. For example, for a cell with a frequency higher than 6 GHz, the first threshold may be 75 dBm; for another example, for a cell with a frequency lower than 6 GHz, the first threshold may be 65 dBm.

Optionally, the terminal device may also send the measurement information of the second target cell to the first network device. The measurement information of the second target cell includes the identifier of the second target cell and/or the service type supported by the second target cell.

Optionally, the terminal device may also send measurement information of other cells to the first network device, and the measurement information includes the measurement information of the first target cell and/or the measurement information of the second target cell. It is not limited.

Optionally, before the first network device controls the cell to switch, each network device may interact with each other on the types of services supported by the cells within their respective coverage areas.

Optionally, in the case that the first target cell does not support a cell of the second service type, that is, the cell to be accessed by the terminal device cannot meet the terminal device’s demand for the service of the second service type, the first network device executes Step S330'.

In step 330', the first network device obtains first information, which is used to indicate that the terminal device suspends the service of the second service type when the cell to which the terminal device is to be switched does not support the service of the second service type.

The first network device may obtain the first information in the following two ways.

Manner 1: The first network device can receive the first information sent by the terminal device.

It is understandable that when the terminal device initiates a service of the second service type, the terminal device may send the first information to the first network device. Or, when the terminal device initiates a network connection, the terminal device sends the first information to the first network device; or, when the terminal device initiates a service of the first service type and a service of the second service type at the same time, the terminal device sends the first information to the first network The device sends the first message.

Manner 2: The first network device receives the first information sent by the operation and maintenance management (operation, administration and maintenance, OAM).

Step S330: The first network device controls the handover of the terminal device according to the access information of the terminal device and the type of the first target cell. The access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device. The embodiments of the present application take the following situations as examples to illustrate the switching of the terminal device controlled by the first network device.

Case 1: The cell to be handed over to the terminal device includes a cell, and the cell currently accessed by the terminal device is a cell of the first cell type, that is, the cell can provide services of the first service type or the second service type .

For example, as shown in the large solid box on the left side of Figure 5, the cell type of the cell currently accessed by the terminal device is the first cell type, that is, the cell currently accessed by the terminal device can provide the terminal device with the first service type and the first service type. 2. Business type. The service type of the service currently accessed by the terminal device includes service 1 (for example, an example of the first service type) and service 2 (for example, an example of the second service type). Wherein, service 1 passes through a cell of the first cell type, and accesses a local industrial control server (for example, the local server shown in FIG. 5); where, service 2 passes through a cell of the first cell type, and accesses to core network equipment. PLMN.

During the continuous movement of the terminal device, the terminal device measures that the RSRP of the first target cell is higher than the first threshold, that is, the terminal device gradually approaches the first target cell, and the first network device needs to be based on the type and The access information of the terminal equipment controls the switching of the terminal equipment.

When the cell type of the cell currently accessed by the terminal device is the first cell type, the type of the first target cell is the second cell type, and the service type of the service currently accessed by the terminal device includes the first service type and the second service type In this case, the first network device may perform step S331 to step S337 and step S340, and the specific steps are shown in FIG. 4.

Step S331: The first network device sends first handover request information to the second network device, where the first handover request information is used to indicate that the terminal device will access the second network device, and the first network device is the network that the terminal device is currently connected to. Device, the second network device is a network device to be accessed by the terminal device.

Optionally, the second network device may be a network device accessed by the first target cell.

Optionally, the first handover request information further includes a first identifier and a second identifier, where the first identifier is the identifier assigned by the first network device to the terminal device that currently needs to switch the cell, and the second identifier is the cell currently needs to be switched. The type of service to be switched for the terminal device.

After receiving the first handover request information, the second network device can know which terminal device requests to access the second network device, and can know the type of service that the terminal device requests to switch. Therefore, the second network device executes step S332.

Step S332: The first network device receives first handover response information sent by the second network device, where the first handover response information is used to indicate whether the terminal device can access the second network device.

In the case that the terminal device can access the second network device, the first network device performs step 333 to step 338. Otherwise, the first network device needs to find a suitable target cell until it finds the corresponding target cell and may connect to it. Entering the network device to which the target cell belongs, the first network device will continue to perform step 333 to step 338.

Step S333: The first network device generates first handover information. The first handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target cell. The first handover information includes the information of the first target cell. ID and the ID of the service of the first service type.

Optionally, in step S334, the first network device sends suspension request information to the core network device, where the suspension request information is used to request to suspend the service of the second service type of the terminal device. Since the first target cell does not support services of the second service type, the first network device may request the core network device to suspend the service of the second service type of the terminal device according to the first information.

Optionally, in step S335, the core network device sends suspended service information to the terminal device, where the suspended service information is used to request that when the cell accessed by the terminal device does not support the service of the second service type, the terminal device sends the second service The type of service is suspended, and the suspended service information includes the identifier of the service of the second service type.

Optionally, the above step S335 can also be replaced by steps S335' and S335".

Optionally, in step S335', the core network device sends suspended service information to the first network device.

Optionally, in step S335", the first network device sends suspended service information to the terminal device.

After the terminal device receives the suspended service information, when the cell that the terminal device accesses does not support the second service type of service, the terminal device determines the second service type according to the service identifier of the second service type in the suspended service information. 2. The business of the business type is suspended.

Optionally, in step S336, the terminal device clears all the transmission entities corresponding to the services of the second service type.

The terminal device clears all the transmission entities corresponding to the services of the second service type, including: the terminal device determines whether the transmission entities corresponding to the services of the second service type are the same as the transmission entities corresponding to the services of other service types;

In the case that the transmission entity corresponding to the service of the second service type is the same as the transmission entity corresponding to the service of the other service type, the terminal device caches the transmission entity corresponding to the service of the second service type in the second service type. Clear all the data corresponding to the business, and renumber the protocol data unit (PDU) in the PDCP data convergence protocol corresponding to the business of other business types;

In the case that the transmission entity corresponding to the service of the second service type is different from the transmission entity corresponding to the service of the other service type, the terminal device clears all the data buffered in the transmission entity corresponding to the service of the second service type. And all the first parameters are reset. The first parameters include shared device access protocol (shared device access protocol, SDAP) parameters and/or PDCP parameters.

For example, in the process of service transmission between a terminal device and a network device accessed by the terminal device, the service of the second service type is the same as the transmission entity corresponding to the service of the first service type, and the terminal device needs to use the transmission entity for transmission All data corresponding to the services of the second service type are cleared, thereby improving resource utilization.

For another example, in the process of service transmission between a terminal device and a network device accessed by the terminal device, the service of the second service type and the service of the first service type correspond to different transmission entities, and the terminal device needs to transfer the service of the second service type All the corresponding data in the transmission entity corresponding to the service is cleared, thereby improving the utilization rate of resources.

When the terminal device clears all the transmission entities corresponding to the services of the second service type, it needs to determine whether the transmission entities corresponding to the services of the second service type are the same as the transmission entities corresponding to the services of other service types, so as to realize the inconsistency with other services. Types of business have an impact, which can increase resource utilization.

Step S337: The terminal device receives the first handover information sent by the first network device.

Step S340: The terminal device switches part or all of the services of the terminal device.

Optionally, the terminal device switches the service of the first service type currently accessed by the terminal device to the first target cell according to the access information of the terminal device and the first handover information.

According to the first handover information, the terminal device can know the cell to be accessed by the terminal device, that is, the first target cell, and the service type supported by the first target cell is the first service type, and the current access service of the terminal device The service type includes the first service type and the second service type. Therefore, the terminal device can switch the service of the first service type to the first target cell; at the same time, the terminal device transfers the service of the second service type to the suspended service information. Suspend, so as to meet the service requirements of the terminal device and ensure the continuity of the terminal device for the first service type.

For example, as shown in the large dashed box on the right side of FIG. 5, the terminal device switches service 1 to the first target cell and suspends service 2.

Case 2: The cell to be handed over by the terminal device includes two cells, and the cell currently accessed by the terminal device is one cell, that is, the cell can provide services of the first service type or the second service type.

For example, as shown in the large solid box on the left side of Figure 7, the cell type of the cell currently accessed by the terminal device is the first cell type, that is, the cell currently accessed by the terminal device can provide the terminal device with the first service type and the first service type. 2. Business type. The service type of the service currently accessed by the terminal device includes service 1 (for example, an example of the first service type) and service 2 (for example, an example of the second service type). Wherein, service 1 passes through a cell of the first cell type, and accesses a local industrial control server (for example, the local server shown in FIG. 7); where, service 2 passes through a cell of the first cell type, and accesses to core network equipment. PLMN.

During the continuous movement of the terminal equipment, the terminal equipment measures that the RSRP of the first target cell is higher than the first threshold. At the same time, the terminal equipment also measures that the RSRP of the second target cell is higher than the second threshold. The target cell and the second target cell are gradually approaching, the first network device needs to control the handover of the terminal device according to the type of the first target cell, the type of the second target cell, and the access information of the terminal device.

Wherein, the second threshold may be preset, and the second threshold may be set according to the frequency of the second target cell. For example, for a cell with a frequency higher than 6 GHz, the second threshold may be 75 dBm; for another example, for a cell with a frequency lower than 6 GHz, the second threshold may be 65 dBm.

The cell type of the cell currently accessed by the terminal device is the first cell type, the type of the first target cell is the second cell type, the type of the second target cell is the third cell type, and the business of the service currently accessed by the terminal device In the case where the types include the first service type and the second service type, the first network device may perform steps S341 to S346, step 343', step 344', and step 340, and the specific steps are shown in FIG. 6.

Step S341: The first network device sends second handover request information to the second network device, where the second handover request information is used to indicate that the terminal device will access the second network device, and the first network device is the network currently connected to the terminal device. Device, the second network device is a network device of the first target cell to be accessed by the terminal device.

Optionally, the second handover request information may include a third identifier and a fourth identifier, where the third identifier is an identifier assigned by the first network device to a terminal device that currently needs to switch a cell, and the fourth identifier is that handover is currently required The type of service to be switched by the terminal equipment of the cell.

After receiving the second handover request information, the second network device can know which terminal device requests to access the second network device, and can know the service type that the terminal device requests to switch. Therefore, the second network device executes step S342.

Step S342: The first network device receives second handover response information sent by the second network device, where the second handover response information is used to indicate whether the terminal device can access the second network device.

In the case that the terminal device can access the second network device, the first network device executes step 343 to step 347. Otherwise, the first network device needs to find a suitable target cell until it finds the corresponding target cell, and may connect to it. Entering the network device to which the target cell belongs, the first network device will continue to perform step 343 to step 347.

Step S341', the first network device sends third handover request information to the third network device, the third handover request information is used to indicate that the terminal device will access the third network device, and the third network device is the terminal device to be accessed. Network equipment of the second target cell.

Optionally, the third handover request information further includes a fifth identifier and a sixth identifier, where the fifth identifier is the identifier assigned by the first network device to the terminal device that currently needs to switch the cell, and the sixth identifier is the current cell that needs to be switched. The type of service to be switched for the terminal device. After receiving the third handover request information, the third network device can know which terminal device requests to access the third network device, and can know the type of service that the terminal device requests to switch. Thus, the third network device executes step S342'.

Step S342', the first network device receives the third handover response information sent by the third network device, and the third handover response information is used to indicate whether the terminal device can access the third network device.

In the case that the terminal device can access the third network device, the first network device performs step 343 to step 347. Otherwise, the first network device needs to find a suitable target cell until it finds the corresponding target cell, and may connect to it. Entering the network device to which the target cell belongs, the first network device will continue to perform step 343 to step 347.

Step S343: The first network device generates second handover information. The second handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target cell. The first handover information includes the identity of the first target cell. And the identity of the first business type.

Step S344: The first network device generates third handover information. The third handover information is used to instruct the terminal device to switch the service of the second service type of the terminal device to the second target cell. The third handover information includes the identity of the second target cell. And the identifier of the business of the second business type.

Optionally, step S343 and step S344 may be performed by the first network device at the same time, and step S341 and step S342 may also be performed by the first network device separately, which is not limited in this application.

Step S345: The terminal device receives the second handover information sent by the first network device.

Step S346: The terminal device receives the third handover information sent by the first network device.

Optionally, the terminal device switches the service of the first service type currently accessed by the terminal device to the first target cell according to the access information of the terminal device and the second handover request information and/or the third handover information, and/or The service of the second service type currently accessed by the terminal device is switched to the second target cell.

According to the second handover request information and/or the third handover information, the terminal device can know the cells to be accessed by the terminal device, that is, the first target cell and the second target cell. The service type supported by the first target cell is the first target cell. A service type, the service type supported by the second target cell is the second service type, and the service type of the service currently accessed by the terminal device includes the first service type and the second service type. Therefore, the terminal device can set the first service type The service of the terminal device is switched to the first target cell, and the service of the second service type is switched to the second target cell, so as to meet the needs of the terminal equipment for the service, and to ensure that the terminal equipment has the service of the first service type and the second service type Continuity.

For example, as shown in the large dashed box on the right side of Figure 7, the terminal device switches service 1 to a cell of the second cell type (ie, the first target cell), and switches service 2 to a cell of the third cell type (ie, , The second target cell).

Optionally, the terminal device performs cell handover according to the second handover request information and/or the third handover information, which can be divided into the following two ways to perform the corresponding cell handover.

Method A: The terminal device first performs cell handover according to the second handover information, and then performs cell handover according to the third handover information.

At the first moment, the terminal device receives the second handover information, and the terminal device switches the service of the first service type currently accessed by the terminal device to the first target cell according to the access information of the terminal device and the second handover information; At the second moment, the terminal device receives the third handover information, and the terminal device switches the service of the second service type currently accessed by the terminal device to the second target cell according to the access information of the terminal device and the third handover information. The second moment is later than the first moment.

Method B: The terminal device performs cell handover according to preset rules, where the preset rule is that the terminal device first receives the handover information and performs cell handover first, that is, the terminal device receives the second handover information and the third handover information The time sequence of cell handover.

At the third moment, the terminal device receives the second handover information, and the terminal device switches the service of the first service type currently accessed by the terminal device to the first target cell according to the access information of the terminal device and the second handover information; At time four, when the terminal device receives the third handover information, the terminal device switches the service of the second service type currently accessed by the terminal device to the second target cell according to the access information of the terminal device and the third handover information, This application does not limit the time of the third moment and the fourth moment.

Optionally, the second handover information further includes a physical random access channel (physical random access channel) PRACH resource of the first target cell.

Optionally, the third handover information further includes the PRACH resource of the second target cell.

According to the PRACH resource of the first target cell and the PRACH resource of the second target cell, the terminal equipment performs an access procedure with the first target cell and the second target cell respectively.

Step S347: The terminal device judges whether the terminal device successfully performs cell handover.

In the case that the terminal device fails to access the cell supporting the service of the first service type, and the terminal device successfully accesses the cell supporting the service of the second service type, the terminal device measures other cell information until the terminal device successfully accesses the cell supporting the first service type. A business cell of a business type;

In the case that the terminal device successfully accesses the cell supporting the service of the first service type, and the terminal device does not successfully access the cell of the service of the second service type, the terminal device suspends the service of the second service type.

As shown in Table 1, in the case that the cell accessed by the terminal device can already meet the demand for private network services, the terminal device does not need to consider whether the terminal device is satisfied with the public network service. In the case that the cell accessed by the terminal device is only satisfied for the terminal device’s public network services, and the terminal device triggers the radio link failure (RLF) process, the terminal device needs to measure other cells and find the private network Business district. That is, the terminal device gives priority to whether the terminal device's demand for private network services is met.

Table 1

Case 3: The cell to be handed over by the terminal device includes one cell, and the cells currently accessed by the terminal device are two cells, where one cell can provide services of the first service type, and one cell can provide services of the second service type.

For example, as shown in the large solid box on the left side of Figure 9, the cells currently accessed by the terminal device are two cells, namely a cell of the second cell type and a cell of the third cell type, where the cell of the third cell type The terminal device is provided with a service of the second service type, and the cell of the second cell type provides the terminal device with a service of the first service type. The service type of the service currently accessed by the terminal device includes service 1 (for example, an example of the first service type) and service 2 (for example, an example of the second service type). Wherein, service 1 passes through a cell of the second cell type and accesses a local industrial control server (for example, the local server shown in FIG. 9); where, service 2 passes through a cell of the third cell type, and accesses to core network equipment. PLMN.

The cell currently accessed by the terminal device includes the third cell and the fourth cell, the cell type of the third cell is the second cell type, the cell type of the fourth cell is the third cell type, and the type of the first target cell is the first cell type. In the case that the cell type and the service type of the service currently accessed by the terminal device include the first service type and the second service type, the first network device may perform steps S351 to S354, and step S340, and the specific steps are shown in FIG. 8 .

Wherein, the third cell and the fourth cell may correspond to the same network device, for example, the third cell and the fourth cell both correspond to the first network device; the third cell and the fourth cell may also correspond to different network devices, for example , The third cell corresponds to the first network device, and the fourth cell corresponds to the fourth network device.

Step S351: The first network device sends fourth handover request information to the second network device, where the fourth handover request information is used to indicate that the terminal device will access the second network device.

The fourth handover request information may also include a seventh identifier and an eighth identifier, where the seventh identifier is the identifier assigned by the first network device to the terminal device that currently needs to switch the cell, and the eighth identifier is the terminal device that currently needs to switch the cell. The type of service to be switched. After receiving the fourth handover request information, the second network device can know which terminal device requests to access the second network device, and can know the type of service that the terminal device requests to switch. Thus, the second network device executes step S353.

Step S352: The first network device receives fourth handover response information sent by the second network device, where the fourth handover response information is used to indicate whether the terminal device can access the second network device.

In the case that the terminal device can access the second network device, the first network device performs step 353, step 354, and step S340. Otherwise, the first network device needs to find a suitable target cell until it finds the corresponding target cell , And may access the network device that the target cell belongs to, the first network device will continue to perform step 353, step 354, and step S340.

Step S353: The first network device generates fourth handover information, which is used to instruct the terminal device to switch the service of the first service type and/or the service of the second service type of the terminal device to the first target cell. The fourth handover information includes the identity of the first target cell.

Optionally, in the case that the third cell and the fourth cell correspond to the same network device, the fourth handover information is used to instruct the terminal device to switch the service of the first service type and the service of the second service type of the terminal device to the second A target cell. In the case where the third cell and the fourth cell correspond to different network devices, the fourth handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target cell.

Step S354: The terminal device receives the fourth handover information sent by the first network device.

Optionally, if the third cell and the fourth cell correspond to different network devices, for example, the third cell corresponds to the first network device, and the fourth cell corresponds to the fourth network device. Then the fourth network device should also execute steps S351', S352', steps S353', and S354'.

Step S351', the fourth network device sends fifth handover request information to the second network device, where the fifth handover request information is used to indicate that the terminal device will access the second network device.

The fifth handover request information also includes a ninth identifier and a tenth identifier. The ninth identifier is the identifier assigned by the fourth network device to the terminal device that currently needs to switch the cell, and the tenth identifier is the terminal device that currently needs to switch the cell. The type of business to switch.

After receiving the fifth handover request information, the second network device can know which terminal device requests to access the second network device, and can know the service type that the terminal device requests to switch. Thus, the second network device executes step S353'.

At the same time, the second network device can know through the seventh identifier and the ninth identifier that the terminal device requesting access to the second network device is the same terminal device, and will indicate through the third handover response information and/or fourth handover response information The first network device or the fourth network device sends corresponding switching information to the terminal device.

Step S352', the first network device receives fifth handover response information sent by the fourth network device, where the fifth handover response information is used to indicate whether the terminal device can access the second network device.

In the case that the terminal device can access the fourth network device, the fourth network device executes step 354'. Otherwise, the fourth network device needs to find a suitable target cell until it finds the corresponding target cell and may access it. For the network device to which the target cell belongs, the first network device will continue to perform step 354'.

Step S353', the fourth network device generates fifth handover information, the fifth handover information is used to instruct the terminal device to switch the service of the second service type of the terminal device to the first target cell, and the fifth handover information includes all The identity of the first target cell.

Step S354', the terminal device receives the fifth handover information sent by the fourth network device.

Step S340, the terminal device switches part or all of the services of the terminal device.

Optionally, the terminal device switches the service of the first service type currently accessed by the terminal device and the service of the second service type according to the access information of the terminal device and the fourth switching request information and/or the fifth switching information To the first target cell.

According to the fourth handover request information and/or the fifth handover information, the terminal device can know the cell to be accessed by the terminal device, that is, the first target cell can support the services of the first service type and the service of the second service type, and the terminal The service type of the service currently accessed by the device includes the first service type and the second service type. Therefore, the terminal device switches both the service of the first service type and the service of the second service type to the first target cell to satisfy the requirements of the terminal device. The requirements for the services of the first service type and the services of the second service type ensure the continuity of the terminal equipment for the services of the first service type and the services of the second service type.

For example, as shown in the large dashed box on the right side of FIG. 9, the terminal device switches both service 1 and service 2 to the first target cell.

Above, FIGS. 3 to 9 illustrate the cell handover method 300 provided by the embodiment of the present application in detail. Hereinafter, the communication device provided by the embodiment of the present application will be described in detail with reference to FIGS.

FIG. 10 is a schematic block diagram of a communication device 1000 provided in the present application. As shown in FIG. 10, the communication device 1000 may include a processing module 1010 and a transceiver module 1020.

Executed in a communication system including cells of at least three cell types, where the cells of the first cell type can support the services of the first service type and the services of the second service type, and the cells of the second cell type only support the first service Type of service, the cell of the third cell type only supports the service of the second service type, and the processing module 1010 is used to control the handover of the terminal device according to the access information of the terminal device and the type of the first target cell, wherein, The access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device.

Optionally, the first service type is a private network service, and the second service type is a public network service. Wherein, the private network service is a service accessed by the terminal device which can only be transmitted in the private network. Optionally, the private network service includes a production service.

Optionally, the transceiver module 1020 is configured to obtain first information, and the first information is used to indicate that the terminal device hangs up if the cell to which the terminal device is to be handed over does not support the service of the second service type. Start the business of the second business type.

Optionally, in the case that the first target cell does not support a cell of the second service type, the transceiver module 1020 is further configured to send suspension request information to the core network device, and the suspension request The information is used to request to suspend the service of the second service type of the terminal device.

Optionally, the cell type of the cell currently accessed by the terminal device is a first cell type, the type of the first target cell is a second cell type, and the service type of the service currently accessed by the terminal device includes In the case of the first service type and the second service type, the processing module 1010 is further specifically configured to generate first handover information according to the access information of the terminal device and the type of the first target cell, and the first The handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target cell, and the first handover information includes the identity of the first target cell and the first target cell. The business identifier of the business type.

Optionally, the processing module 1010 is further configured to control the handover of the terminal device according to the access information of the terminal device, the type of the first target cell, and the type of the second target cell.

Optionally, the cell type of the cell currently accessed by the terminal device is a first cell type, the type of the first target cell is a second cell type, and the type of the second target cell is a third cell When the type and the service type of the service currently accessed by the terminal device include the first service type and the second service type, the processing module 1010 is further specifically configured to perform the processing according to the access information and the service type of the terminal device. The type of the first target cell and the type of the second target cell generate second handover information, where the second handover information is used to instruct the terminal device to switch the terminal device’s service of the first service type to For the first target cell, the first handover information includes the identity of the first target cell and the identity of the service of the first service type; and/or the first network device according to the access of the terminal device Information, the type of the first target cell, and the type of the second target cell to generate third handover information, where the third handover information is used to instruct the terminal device to use the second service of the terminal device The type of service is switched to the second target cell, and the third handover information includes the identifier of the second target cell and the identifier of the service of the second service type.

Optionally, the cell currently accessed by the terminal device includes a third cell and a fourth cell, the cell type of the third cell is the second cell type, and the cell type of the fourth cell is the third cell Type, the type of the first target cell is the first cell type and the service type of the service currently accessed by the terminal device includes the first service type and the second service type, the processing module 1010 It is also specifically configured to generate fourth handover information according to the access information of the terminal device and the type of the first target cell, where the fourth handover information is used to instruct the terminal device to set the terminal device's The services of the first service type and/or the services of the second service type are handed over to the first target cell, and the fourth handover information includes the identity of the first target cell.

Optionally, the transceiver module 1020 is further specifically configured to receive the measurement information of the first target cell sent by the terminal device, where the measurement information of the first target cell includes the identity of the first target cell and/ Or the service type supported by the first target cell.

Optionally, the transceiver module 1020 is further specifically configured to receive second information sent by a second network device, where the second information is used to indicate a service type supported by the first target cell, and the second network device is The network equipment of the first target cell.

Optionally, the transceiver module 1020 is further specifically configured to receive the measurement information of the second target cell sent by the terminal device, where the measurement information of the second target cell includes the identity of the second target cell and/ Or the service type supported by the second target cell.

Optionally, the transceiver module 1020 is further specifically configured to receive third information sent by a third network device, where the third information is used to indicate a service type supported by the second target cell, and the third network device is The network equipment of the second target cell.

Optionally, the transceiver module 1020 is further specifically configured to receive the first information sent by the terminal device; or, the first network device receives the first information sent by the operation, maintenance and management OAM.

Optionally, the transceiver module 1020 is also specifically configured to receive the first information sent by the terminal device when the terminal device initiates a service of the second service type; or the transceiver module 1020 is also specifically configured to When the terminal device initiates a network connection, it receives the first information sent by the terminal device; or the transceiver module 1020 is also specifically configured to initiate the first service type of service and the second service at the same time on the terminal device For types of services, receiving the first information sent by the terminal device.

Optionally, the transceiver module 1020 is further specifically configured to send first handover request information to the second network device, and the first handover request information is used to indicate that the terminal device will access the second network device , The first network device is the network device currently accessed by the terminal device, the second network device is the network device to be accessed by the terminal device; the first network device receives the second network device The sent first handover response information, where the first handover response information is used to indicate whether the terminal device can access the second network device.

Optionally, the first handover request information includes a first identifier and a second identifier, the first identifier is an identifier assigned by the first network device to the terminal device, and the second identifier is the terminal device The type of service to be switched on the device.

It should be understood that the communication apparatus described in FIG. 10 may be a first network device.

The communication device 1000 provided in the present application may correspond to the process performed by the first network device in the method embodiments of FIGS. 3 to 9 described above.

FIG. 11 is a schematic block diagram of a communication device 1100 according to an embodiment of the present application. As shown in FIG. 11, the communication device 1100 may include a processing module 1110 and a transceiver unit 1120.

Executed in a communication system including cells of at least three cell types, where the cells of the first cell type can support the services of the first service type and the services of the second service type, and the cells of the second cell type only support the first service Type of service, the cell of the third cell type only supports the service of the second service type, and the processing module 1110 is used to switch part or all of the services of the terminal device according to the access information of the terminal device. The access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device. Optionally, the first service type is a private network service, and the second service type is a public network service.

Optionally, the transceiving module 1120 is further configured to receive suspended service information sent by a core network device, and the suspended service information is used to request that the cell accessed by the terminal device does not support the second service type. When performing a service, the terminal device suspends the service of the second service type, and the suspended service information includes the identifier of the service of the second service type.

Optionally, after the transceiver module 1120 is further configured to receive the suspended service information sent by the core network device, the method further includes: the terminal device clears all the transmission entities corresponding to the service of the second service type .

Optionally, the processing module 1110 is configured to determine whether the transmission entity corresponding to the service of the second service type is the same as the transmission entity corresponding to the service of other service types; in the transmission corresponding to the service of the second service type When the entity is the same as the transmission entity corresponding to the service of the other service type, the processing module 1110 is specifically configured to cache all the data corresponding to the service of the second service type in the transmission entity corresponding to the service of the second service type. Clear, and renumber the protocol data unit PDU in the PDCP corresponding to the services of other service types; the transmission entity corresponding to the service of the second service type and the transmission entity corresponding to the service of other service types In different cases, the processing module 1110 is also specifically configured to clear all the data buffered in the transmission entity corresponding to the service of the second service type, and reset all the first parameters, which include the shared device Access protocol SDAP parameters and/or PDCP parameters.

Optionally, the transceiving module 1120 is further configured to receive first handover information sent by the first network device, where the first handover information is used to instruct the terminal device to use the first service type of the terminal device The service is switched to the first target cell, and the first handover information includes the identity of the first target cell and the identity of the service of the first service type; the processing module 1110 is also specifically configured to The access information of the device and the first handover information switch the service of the first service type currently accessed by the terminal device to the first target cell.

Optionally, the transceiver module 1120 is further configured to receive second handover information sent by the first network device, where the second handover information is used to instruct the terminal device to use the first service of the terminal device The type of service is handed over to the first target cell, and the first handover information includes the identity of the first target cell and the identity of the service of the first service type; and/or the terminal device receives the first target cell Third handover information sent by a network device, where the third handover information is used to instruct the terminal device to switch the service of the second service type of the terminal device to the second target cell, and the third The handover information includes the identifier of the second cell and the service identifier of the second service type; the processing module 1110 is also specifically configured to compare the access information of the terminal device with the second handover information and/or The third handover information is to switch the service of the first service type currently accessed by the terminal device to the first target cell, and/or to switch the service of the second service type currently accessed by the terminal device to all The second target cell.

Optionally, at the first moment, the processing module 1110 is further configured to switch the service of the first service type currently accessed by the terminal device to all services according to the access information of the terminal device and the second switching information. The first target cell; at the second moment, the processing module 1110 is further configured to switch the service of the second service type currently accessed by the terminal device according to the access information of the terminal device and the third handover information To the second target cell, the second time is later than the first time; or the processing module 1110 is further configured to perform cell handover according to a preset rule, where the preset rule is The handover information received by the communication device 1110 first performs cell handover.

Optionally, the second handover information further includes a physical random access channel PRACH resource of the first target cell.

Optionally, the third handover information further includes PRACH resources of the second target cell.

Optionally, the processing module 1110 is further configured to determine whether the terminal device successfully performs cell handover; the communication device 1110 has not successfully accessed the cell supporting the service of the first service type, and the communication device When 1110 successfully accesses the cell of the service of the second service type, the processing module 1110 is further configured to measure other cell information until the communication device 1110 successfully accesses the service supporting the service of the first service type. Cell; in the case that the communication device 1110 successfully accesses the cell supporting the service of the first service type, and the communication device 1110 does not successfully access the cell of the service of the second service type, the processing The module 1110 suspends the service of the second service type.

Optionally, the transceiver module 1120 is further configured to receive fourth handover information sent by the first network device, where the fourth handover information is used to instruct the terminal device to use the first service of the terminal device Types of services and/or services of the second type of service are handed over to the first target cell, and the fourth handover information includes the identity of the first target cell; the processing module 1110 is also specifically configured to The access information of the terminal device and the fourth handover information switch the service of the first service type and the service of the second service type currently accessed by the terminal device to the first target cell.

Optionally, the transceiver module 1120 is further configured to send measurement information of the first target cell to the first network device, where the measurement information of the first target cell includes the identity of the first target cell and/or the first target cell. A service type supported by the target cell.

Optionally, the transceiver module 1120 is further configured to send measurement information of the second target cell to the first network device, where the measurement information of the second target cell includes the identity of the second target cell and/ Or the service type supported by the second target cell.

Optionally, the transceiver module 1120 is further configured to send first information to the first network device, where the first information is used to indicate that the cell to which the terminal device is to be handed over does not support the second service type. In the case of a service, the terminal device suspends the service of the second service type.

Optionally, when the communication device 1110 initiates a service of the second service type, the transceiver module 1120 is further configured to send first information to the first network device; or when the communication device 1110 initiates a network connection , The transceiver module 1120 is further configured to send first information to the first network device; or when the communication device 1110 simultaneously initiates a service of the first service type and a service of the second service type, the transceiver module 1120 It is also used to send first information to the first network device.

It should be understood that the communication device described in FIG. 11 may be a terminal device.

The communication device 1110 provided in the present application may correspond to the process performed by the terminal device in the above-mentioned method embodiments of FIGS. 3 to 9.

FIG. 12 is a schematic structural diagram of a terminal device 2000 provided by an embodiment of the present application. The terminal device 2000 can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiment. As shown in FIG. 12, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further includes a memory 2030. Among them, the processor 2010, the transceiver 2002, and the memory 2030 can communicate with each other through internal connection paths to transfer control and/or data signals. The memory 2030 is used for storing computer programs, and the processor 2010 is used for downloading from the memory 2030. Call and run the computer program to control the transceiver 2020 to send and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040 for transmitting the uplink data or uplink control signaling output by the transceiver 2020 through a wireless signal.

The aforementioned processor 2010 and the memory 2030 can be combined into a processing device, and the processor 2010 is configured to execute the program code stored in the memory 2030 to implement the aforementioned functions. During specific implementation, the memory 2030 may also be integrated in the processor 2010 or independent of the processor 2010. The processor 2010 may correspond to the processing module 1110 in FIG. 11.

The aforementioned transceiver 2020 may correspond to the transceiver module 1120 in FIG. 11, and may also be referred to as a transceiver module. The transceiver 2020 may include a receiver (or called receiver, receiving circuit) and a transmitter (or called transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device 2000 shown in FIG. 12 can implement various processes involving the terminal device in the method embodiments shown in FIGS. 3 to 9. The operations and/or functions of each module in the terminal device 2000 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the foregoing method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

The above-mentioned processor 2010 can be used to execute the actions described in the previous method embodiments implemented by the terminal device, and the transceiver 2020 can be used to execute the terminal device described in the previous method embodiments to send to or from the first network device Action received by the network device. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

Optionally, the aforementioned terminal device 2000 may further include a power supply 2050 for providing power to various devices or circuits in the terminal device.

In addition, in order to make the function of the terminal device more complete, the terminal device 2000 may also include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, and a sensor 2100. The audio circuit A speaker 2082, a microphone 2084, etc. may also be included.

FIG. 13 is an example of a schematic structural diagram of a first network device provided by an embodiment of the present application. The schematic structural diagram of the first network device shown in FIG. 13 may be, for example, a schematic structural diagram of a base station. The base station 3000 can be applied to the system shown in FIG. 1 to perform the function of the first network device in the foregoing method embodiment. As shown in the figure, the base station 3000 may include one or more radio frequency units, such as a remote radio unit (RRU) 3100 and one or more baseband units (BBU) (also known as distributed unit (DU) )) 3200. The RRU 3100 may be called a transceiver module, which corresponds to the transceiver module 1020 in FIG. 10. Optionally, the transceiver module 3100 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 3101 and a radio frequency unit 3102. Optionally, the transceiver module 3100 may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (or receiver or receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter or transmitting circuit). The RRU 3100 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending instruction information to terminal equipment. The 3200 part of the BBU is mainly used for baseband processing and control of the base station. The RRU 3100 and the BBU 3200 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 3200 is the control center of the base station, and may also be called a processing module, which may correspond to the processing module 1010 in FIG. 10, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing module) may be used to control the base station to execute the operation procedure of the first network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU 3200 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access standard (such as an LTE network), or support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the first network device in the foregoing method embodiment. The memory 3201 and the processor 3202 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

It should be understood that the base station 3000 shown in FIG. 13 can implement each process involving the first network device in the method embodiments in FIG. 3 to FIG. 9. The operations and/or functions of the various modules in the base station 3000 are used to implement the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the foregoing method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

The above-mentioned BBU 3200 can be used to perform the actions described in the previous method embodiments implemented by the first network device, and the RRU 3100 can be used to perform the first network device described in the previous method embodiments to send to or from the terminal device Receive action. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

The embodiment of the present application also provides a processing device including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver, and transmit signals through a transmitter, so as to execute the methods in the embodiments shown in FIGS. 3 to 9 above.

Optionally, there are one or more processors, and one or more memories.

The aforementioned processing device may be a chip. The processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor. This is achieved by reading the software code stored in the memory, the memory may be integrated in the processor, may be located outside the processor, and exist independently.

The embodiment of the present application also provides a computer program product, the computer program product includes: a computer program (also called code, or instruction), when the computer program is run, the computer executes the implementation of the method in FIG. 2 The method in the example.

The embodiment of the present application also provides a computer-readable medium that stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the implementation of the method in FIG. 2 above. The method in the example.

An embodiment of the present application also provides a communication system, including the aforementioned first network device and terminal device.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A cell handover method is characterized by being executed in a communication system including cells of at least three cell types, wherein the cells of the first cell type can support the services of the first service type and the services of the second service type. Cells of the second cell type only support services of the first service type, and cells of the third cell type only support services of the second service type, including:

The first network device controls the handover of the terminal device according to the access information of the terminal device and the type of the first target cell,

Wherein, the access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device.
The method according to claim 1, wherein the first service type is a private network service, and the second service type is a public network service.
The method according to claim 1 or 2, wherein the method further comprises:

The first network device obtains first information, and the first information is used to indicate that the terminal device suspends the second service type when the cell to which the terminal device is to be handed over does not support the service of the second service type. The second type of business.
The method according to any one of claims 1 to 3, characterized in that, in the case that the first target cell does not support a cell of the second service type, the method further comprises:

The first network device sends suspension request information to the core network device, where the suspension request information is used to request suspension of the service of the second service type of the terminal device.
The method according to claim 1 or 2, wherein the cell type of the cell currently accessed by the terminal device is a first cell type, the type of the first target cell is a second cell type and In the case that the service type of the service currently accessed by the terminal device includes the first service type and the second service type, the first network device controls all services according to the access information of the terminal device and the type of the first target cell. The switching of the terminal equipment includes:

The first network device generates first handover information according to the access information of the terminal device and the type of the first target cell, where the first handover information is used to instruct the terminal device to set the terminal device's first A service of a service type is switched to the first target cell, and the first handover information includes an identifier of the first target cell and an identifier of the service of the first service type.
The method according to any one of claims 1 to 3, wherein the first network device controls the handover of the terminal device according to the access information of the terminal device and the type of the first target cell include:

The first network device controls the handover of the terminal device according to the access information of the terminal device, the type of the first target cell, and the type of the second target cell.
The method according to claim 6, wherein the cell type of the cell currently accessed by the terminal device is a first cell type, the type of the first target cell is a second cell type, and the 2. In the case where the type of the target cell is the third cell type and the service type of the service currently accessed by the terminal device includes the first service type and the second service type, the first network device The access information of the device, the type of the first target cell and the type of the second target cell, and controlling the handover of the terminal device includes:

The first network device generates second handover information according to the access information of the terminal device, the type of the first target cell, and the type of the second target cell, and the second handover information is used to indicate the The terminal device switches the service of the first service type of the terminal device to the first target cell, and the first handover information includes the identifier of the first target cell and the service identifier of the first service type; and / or

The first network device generates third handover information according to the access information of the terminal device, the type of the first target cell, and the type of the second target cell, and the third handover information is used to indicate the The terminal device switches the service of the second service type of the terminal device to the second target cell, and the third handover information includes the identifier of the second target cell and the service information of the second service type. Logo.
The method according to any one of claims 1 to 3, wherein the cell currently accessed by the terminal device includes a third cell and a fourth cell, and the cell type of the third cell is second Cell type, the cell type of the fourth cell is the third cell type, the type of the first target cell is the first cell type, and the service type of the service currently accessed by the terminal device includes the first service type and In the case of the second service type, the first network device controlling the handover of the terminal device according to the access information of the terminal device and the type of the first target cell includes:

The first network device generates fourth handover information according to the access information of the terminal device and the type of the first target cell, and the fourth handover information is used to instruct the terminal device to change the all the information of the terminal device. The service of the first service type and/or the service of the second service type is handed over to the first target cell, and the fourth handover information includes the identity of the first target cell.
The method according to any one of claims 1 to 8, wherein the method further comprises:

The first network device receives the measurement information of the first target cell sent by the terminal device, where the measurement information of the first target cell includes the identity of the first target cell and/or the first target cell Supported business types.
The method according to any one of claims 6 to 9, wherein the method further comprises:

The first network device receives the measurement information of the second target cell sent by the terminal device, where the measurement information of the second target cell includes the identity of the second target cell and/or the second target cell Supported business types.
The method according to claim 3, wherein the first network device acquiring the first information comprises:

The first network device receives the first information sent by the terminal device; or,

The first network device receives the first information sent by the operation, maintenance and management OAM.
The method according to claim 11, wherein the receiving, by the first network device, the first information sent by the terminal device comprises:

The first network device receives the first information sent by the terminal device when the terminal device initiates a service of the second service type; or

The first network device receives the first information sent by the terminal device when the terminal device initiates a network connection; or

The first network device receives the first information sent by the terminal device when the terminal device simultaneously initiates the service of the first service type and the service of the second service type.
The method according to any one of claims 1 to 12, wherein the method further comprises:

The first network device sends first handover request information to the second network device, where the first handover request information is used to indicate that the terminal device will access the second network device, and the first network device Is the network device currently accessed by the terminal device, and the second network device is the network device to be accessed by the terminal device;

The first network device receives first handover response information sent by the second network device, where the first handover response information is used to indicate whether the terminal device can access the second network device.
The method according to claim 13, wherein the first handover request information includes a first identifier and a second identifier, and the first identifier is an identifier assigned by the first network device to the terminal device, The second identifier is the service type to be switched by the terminal device.
A cell handover method is characterized by being executed in a communication system including cells of at least three cell types, wherein the cells of the first cell type can support the services of the first service type and the services of the second service type. Cells of the second cell type only support services of the first service type, and cells of the third cell type only support services of the second service type, including:

The terminal device switches part or all of the services of the terminal device according to the access information of the terminal device,

Wherein, the access information of the terminal device includes the service type of the service currently accessed by the terminal device and/or the cell type of the cell currently accessed by the terminal device.
The method according to claim 15, wherein the first service type is a private network service, and the second service type is a public network service.
The method according to claim 15 or 16, wherein the method further comprises:

The terminal device receives the suspended service information sent by the core network device, and the suspended service information is used to request that when the cell accessed by the terminal device does not support the service of the second service type, the terminal device will The service of the second service type is suspended, and the information of the suspended service includes an identifier of the service of the second service type.
The method according to claim 17, wherein after the terminal device receives the suspended service information sent by the core network device, the method further comprises:

The terminal device clears all the transmission entities corresponding to the services of the second service type.
The method according to claim 18, wherein the terminal device clearing all the transmission entities corresponding to the services of the second service type comprises:

The terminal device judges whether the transmission entity corresponding to the service of the second service type is the same as the transmission entity corresponding to the service of other service types;

In the case that the transmission entity corresponding to the service of the second service type is the same as the transmission entity corresponding to the service of the other service type, the terminal device caches the transmission entity corresponding to the service of the second service type in the first 2. All the data corresponding to the business of the service type are cleared, and the protocol data unit PDU in the data convergence protocol PDCP corresponding to the service of other service types is renumbered;

In the case that the transmission entity corresponding to the service of the second service type is different from the transmission entity corresponding to the service of the other service type, the terminal device caches the transmission entity corresponding to the service of the second service type All data is cleared, and all the first parameters are reset. The first parameters include shared device access protocol SDAP parameters and/or PDCP parameters.
The method according to claim 15 or 16, wherein the terminal device switching part or all of the services of the terminal device according to the access information of the terminal device comprises:

The terminal device receives first handover information sent by the first network device, where the first handover information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first target A cell, where the first handover information includes the identity of the first target cell and the identity of the service of the first service type;

The terminal device switches the service of the first service type currently accessed by the terminal device to the first target cell according to the access information of the terminal device and the first handover information.
The method according to any one of claims 15 to 19, wherein the terminal device switching part or all of the services of the terminal device according to the access information of the terminal device comprises:

The terminal device receives second switching information sent by the first network device, where the second switching information is used to instruct the terminal device to switch the service of the first service type of the terminal device to the first A target cell, the second handover information includes the identity of the first target cell and the identity of the service of the first service type; and/or

The terminal device receives third switching information sent by the first network device, where the third switching information is used to instruct the terminal device to switch the service of the second service type of the terminal device to the first 2. a target cell, where the third handover information includes an identifier of the second cell and an identifier of a service of the second service type;

The terminal device switches the service of the first service type currently accessed by the terminal device to the first target according to the access information of the terminal device and the second switching information and/or the third switching information Cell, and/or, handover the service of the second service type currently accessed by the terminal device to the second target cell.
The method of claim 21, wherein the method further comprises:

At the first moment, the terminal device switches the service of the first service type currently accessed by the terminal device to the first target cell according to the access information of the terminal device and the second handover information; At the second moment, the terminal device switches the service of the second service type currently accessed by the terminal device to the second target cell according to the access information of the terminal device and the third handover information, and the second Time is later than said first time; or

The terminal device correspondingly performs cell handover according to a preset rule, where the preset rule is that the terminal device first receives handover information and performs cell handover first.
The method according to any one of claims 21 or 22, wherein the second handover information further includes a physical random access channel PRACH resource of the first target cell.
The method according to any one of claims 21 or 22, wherein the third handover information further includes PRACH resources of the second target cell.
The method according to any one of claims 15 to 24, wherein the method further comprises:

The terminal device determines whether the terminal device successfully performs cell handover;

In the case that the terminal device does not successfully access the cell supporting the service of the first service type, and the terminal device successfully accesses the cell of the service of the second service type, the terminal device measures other cells Information until the terminal device successfully accesses the cell supporting the service of the first service type;

In the case that the terminal device successfully accesses the cell supporting the service of the first service type, and the terminal device does not successfully access the cell of the service of the second service type, the terminal device will The service of the second service type is suspended.
The method according to any one of claims 15 to 19, wherein the terminal device switching part or all of the services of the terminal device according to the access information of the terminal device comprises:

The terminal device receives fourth handover information sent by the first network device, where the fourth handover information is used to instruct the terminal device to change the service of the first service type of the terminal device and/or the The service of the second service type is handed over to the first target cell, and the fourth handover information includes the identity of the first target cell;

The terminal device switches the service of the first service type and the service of the second service type currently accessed by the terminal device to the first target according to the access information of the terminal device and the fourth switching information Community.
The method according to any one of claims 15 to 26, wherein the method further comprises:

The terminal device sends the measurement information of the first target cell to the first network device, where the measurement information of the first target cell includes the identity of the first target cell and/or the service type supported by the first target cell.
The method according to any one of claims 21 to 25, wherein the method further comprises:

The terminal device sends the measurement information of the second target cell to the first network device, where the measurement information of the second target cell includes the identity of the second target cell and/or the second target cell supports Business type.
The method according to any one of claims 15 to 28, wherein the method further comprises:

The terminal device sends first information to the first network device, where the first information is used to indicate that when the cell to which the terminal device is to be handed over does not support the service of the second service type, the terminal The device suspends the service of the second service type.
The method according to claim 29, wherein the terminal device sending the first information to the first network device comprises:

When the terminal device initiates a service of the second service type, the terminal device sends first information to the first network device; or

When the terminal device initiates a network connection, the terminal device sends first information to the first network device; or

When the terminal device simultaneously initiates a service of the first service type and a service of the second service type, the terminal device sends the first information to the first network device.
A communication device, characterized by comprising various modules or units for executing the method according to any one of claims 1 to 14.
A communication device, characterized by comprising various modules or units for executing the method according to any one of claims 15 to 30.
A storage medium, characterized in that a computer program or instruction is stored on the storage medium, wherein when the computer program or instruction is executed, the computer executes the method according to any one of claims 1 to 14 method.
A storage medium on which a computer program or instruction is stored, wherein the computer program or instruction is executed to cause a computer to execute the method according to any one of claims 15 to 30.
A chip system, comprising: a processor, configured to execute the method according to any one of claims 1 to 14.
A chip system, characterized by comprising: a processor, configured to execute the method according to any one of claims 15 to 30.
A communication system, characterized by comprising a communication device for executing the method according to any one of claims 1 to 14, and/or for executing the method according to any one of claims 15 to 30 Method of communication device.