CN110636553A - A data transmission method and device - Google Patents

Abstract

A data transmission method and apparatus, wherein the method includes: a core network device determines to switch data of a terminal device from a control plane to a user plane for transmission; the core network device sends first indication information to the terminal device, the first The indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmitting uplink data.

Description

A data transmission method and device

technical field

The present application relates to the field of communication technologies, and in particular, to a data transmission method and apparatus.

Background technique

In a wireless communication system, two data transmission modes can be used to transmit data: a user plane transmission mode and a control plane transmission mode. The control plane transmission mode can be used to transmit data packets with a small amount of data (such as data packets of about 20 bytes, hereinafter referred to as small data packets), while the user plane transmission mode is suitable for transmitting data packets with a large amount of data (such as 200 bytes of data). Data packets of bytes and above are hereinafter referred to as large packet data). In the process of data packet transmission, the transmission mode can be switched according to the actual situation. For example, assuming that the terminal device is currently using the control plane transmission scheme to transmit small packets of data, when the server updates the software on the terminal, it will send large packets of data (200-byte data packets), so the terminal device or network device triggers Switch the control plane transmission mode to the user plane transmission mode, so as to transmit large packet data through the user plane transmission mode.

In the process of switching from the control plane transmission mode to the user plane transmission mode initiated by the network side device, the control plane tunnel has been released, but the terminal device continues to send uplink data to the network side device through the control plane, resulting in the failure of uplink data packet transmission . Further, the failure of uplink data transmission causes the terminal device to repeatedly send the uplink data, resulting in waste of transmission resources.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a data transmission method and apparatus, which are used to solve the problem of waste of transmission resources caused by the terminal equipment repeatedly sending uplink data when the data transmission scheme is switched.

In a first aspect, an embodiment of the present application provides a data transmission method, which includes:

The core network device determines to switch data of the terminal device from the control plane to the user plane for transmission; the core network device sends first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop passing the control or the first indication information is used to instruct the terminal device to stop transmitting uplink data.

Through the above method, after the core network device determines to switch data of the terminal device to user plane transmission, it instructs the terminal device to stop transmitting uplink data through the first indication information, and the terminal device no longer transmits uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an optional implementation manner, the core network device determines to switch data of the terminal device from the control plane to the user plane for transmission, including:

obtaining, by the core network device, data statistics of the terminal device according to the data of the terminal device transmitted through the control plane;

When the data statistical information satisfies a preset condition, the core network device determines to switch the data of the terminal device from the control plane to the user plane for transmission.

Through the above method, the core network device can, according to the detected data statistical information, for example, the size and/or number of data packets transmitted by the terminal device on the control plane, so that when the data statistical information meets the preset conditions, the terminal device can The data is switched to the user plane transmission to improve the data transmission efficiency of the terminal equipment.

In an optional implementation manner, the data statistical information includes the data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; or, the data statistical information Including the number of data packets of the terminal device, and the preset condition is that the number is greater than the second threshold; or, the data statistical information includes the data packet size of the terminal device and the data packet of the terminal device. The preset condition is that the size of the data packet of the terminal device is greater than the first threshold, and the number is greater than the second threshold.

In an optional implementation manner, the core network device determines to switch data of the terminal device from the control plane to the user plane for transmission, including:

When the core network device receives the second indication information from the first device, the core network device determines to switch the data of the terminal device from the control plane to the user plane for transmission;

Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane for transmission; or, the second indication information is used to indicate the data of the terminal device transmitted on the control plane. The data packet size is greater than the first threshold; or, the second indication information is used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than the second threshold; or, the second indication information is used to Indicates that the size of the data packets of the terminal equipment transmitted on the control plane is greater than a first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than a second threshold.

Through the above method, the core network device can determine to switch the data of the terminal device to the user plane transmission according to the second indication information. This method is simple to implement. While improving the data transmission efficiency of the terminal device, it also reduces the data transmission efficiency of the core network device. the complexity.

In an optional implementation manner, the first device is any of the following:

The service gateway SGW; the packet data gateway PGW; the access network element; the terminal equipment; the session management function SMF network element; the user plane function UPF network element; or, the access and mobility management function AMF network element.

In an optional implementation manner, before the core network device sends the first indication information to the terminal device, the method further includes:

The core network device determines that the load of the core network device is greater than a third threshold.

Through the above method, the core network device determines whether to send the first indication information according to its own load, which can ensure the load balance of the core network device.

In a second aspect, an embodiment of the present application provides a communication device, the communication device includes a memory, a communication interface, and a processor, wherein: the memory is used for storing instructions; the processor is used for executing the instructions stored in the memory and controlling the communication interface to perform Signal reception and signal transmission, when the processor executes the instructions stored in the memory, are used to perform the method in the above first aspect or any possible design of the first aspect.

In a third aspect, an embodiment of the present application provides a communication device for implementing the first aspect or any method in the first aspect, including corresponding functional modules, such as a processing unit, a transceiver unit, etc., respectively used for Implement the steps in the above method.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when a computer reads and executes the computer-readable instructions, the computer executes the first A method in the aspect or any possible design of the first aspect.

In a fifth aspect, an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes the computer to execute the method in the first aspect or any possible design of the first aspect.

In a sixth aspect, an embodiment of the present application provides a chip, which is connected to a memory and used to read and execute a software program stored in the memory, so as to realize the first aspect or any one of the first aspects. method in the design.

In a seventh aspect, an embodiment of the present application provides a data transmission method, including:

The terminal device receives first indication information from the core network device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmitting uplink data; the terminal device stops transmitting uplink data through the control plane according to the first indication information.

Through the above method, after the terminal device receives the first indication information sent by the core network device, it does not transmit uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an eighth aspect, an embodiment of the present application provides a communication device, the communication device includes a memory, a transceiver, and a processor, wherein: the memory is used to store instructions; the processor is used to execute the instructions stored in the memory and control the transceiver to perform Signal reception and signal transmission, when the processor executes the instructions stored in the memory, are used to perform the method in the above seventh aspect or any possible design of the seventh aspect.

In a ninth aspect, an embodiment of the present application provides a communication device for implementing any one of the seventh aspect or the seventh aspect, including corresponding functional modules, such as a receiving unit, a sending unit, etc., respectively used for Implement the steps in the above method.

In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when a computer reads and executes the computer-readable instructions, the computer executes the seventh A method in any possible design of the aspect or seventh aspect.

In an eleventh aspect, an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes the computer to execute the method in the seventh aspect or any possible design of the seventh aspect .

In a twelfth aspect, an embodiment of the present application provides a chip, which is connected to a memory and used to read and execute a software program stored in the memory, so as to implement any one of the seventh aspect or the seventh aspect possible design methods.

In a thirteenth aspect, an embodiment of the present application provides a data transmission method, the method comprising:

The core network device determines to trigger the establishment of a user plane bearer for the terminal device, where the user plane bearer is used to transmit data of the terminal device; the core network device sends first indication information to the terminal device, the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmitting uplink data.

Through the above method, after the core network device determines to trigger the establishment of a user plane bearer for the terminal device, it instructs the terminal device to stop transmitting uplink data through the first indication information, and the terminal device no longer transmits uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an optional implementation manner, the core network device determines to trigger the establishment of a user plane bearer for the terminal device, including:

obtaining, by the core network device, data statistics of the terminal device according to the data of the terminal device transmitted through the control plane;

When the data statistical information satisfies a preset condition, the core network device determines to trigger the establishment of a user plane bearer for the terminal device.

Through the above method, the core network device can determine the trigger as the terminal device according to the detected data statistical information, for example, the size and/or number of data packets transmitted by the terminal device on the control plane, when the data statistical information meets the preset conditions The user plane bearer is established to improve the data transmission efficiency of terminal equipment.

In an optional implementation manner, the data statistical information includes the data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; or, the data statistical information Including the number of data packets of the terminal device, and the preset condition is that the number is greater than the second threshold; or, the data statistical information includes the data packet size of the terminal device and the data packet of the terminal device. The preset condition is that the size of the data packet of the terminal device is greater than the first threshold, and the number is greater than the second threshold.

In an optional implementation manner, the core network device determines to trigger the establishment of a user plane bearer for the terminal device, including:

When the core network device receives the second indication information from the first device, the core network device determines to trigger the establishment of a user plane bearer for the terminal device;

Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane for transmission; or, the second indication information is used to indicate the data of the terminal device transmitted on the control plane. The data packet size is greater than the first threshold; or, the second indication information is used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than the second threshold; or, the second indication information is used to Indicates that the size of the data packets of the terminal equipment transmitted on the control plane is greater than a first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than a second threshold.

Through the above method, the core network device can determine to trigger the establishment of a user plane bearer for the terminal device according to the second indication information, which is simple to implement, and reduces the complexity of core network device implementation while improving the data transmission efficiency of the terminal device.

In an optional implementation manner, the first device is any of the following:

The service gateway SGW; the packet data gateway PGW; the access network element; the terminal equipment; the session management function SMF network element; the user plane function UPF network element; or, the access and mobility management function AMF network element.

In an optional implementation manner, before the core network device sends the first indication information to the terminal device, the method further includes:

The core network device determines that the load of the core network device is greater than a third threshold.

Through the above method, the core network device determines whether to send the first indication information according to its own load, which can ensure the load balance of the core network device.

In a fourteenth aspect, an embodiment of the present application provides a communication device, the communication device includes a memory, a communication interface, and a processor, wherein: the memory is used for storing instructions; the processor is used for executing the instructions stored in the memory and controlling the communication interface Signal reception and signal transmission are performed, and when the processor executes the instructions stored in the memory, the method is used to perform the method in the thirteenth aspect or any possible design of the thirteenth aspect.

A fifteenth aspect, an embodiment of the present application provides a communication device for implementing any one of the thirteenth aspect or the thirteenth aspect, including corresponding functional modules, such as a processing unit, a transceiver unit, and the like, They are respectively used to implement the steps in the above method.

In a sixteenth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when a computer reads and executes the computer-readable instructions, the computer executes the above-mentioned first The method in the thirteenth aspect or any possible design of the thirteenth aspect.

In a seventeenth aspect, an embodiment of the present application provides a computer program product, which, when a computer reads and executes the computer program product, causes the computer to execute the thirteenth aspect or any of the possible designs of the thirteenth aspect. Methods.

In an eighteenth aspect, an embodiment of the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory, so as to realize the thirteenth aspect or any one of the thirteenth aspects. A possible method in design.

Description of drawings

FIG. 1 is a schematic diagram of a system architecture applicable to an embodiment of the present application;

2 is a schematic flowchart of a data transmission method provided by an embodiment of the present application;

3 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The embodiments of the present application may be applied to various mobile communication systems, for example, a new radio (NR) system, a long term evolution (LTE) system, and an advanced long term evolution (LTE-A) system , an evolved long term evolution (evolved long term evolution, eLTE) system, etc., which are not limited here.

To facilitate understanding of the embodiments of the present application, firstly, a communication system applicable to the embodiments of the present application is described in detail by taking the communication system shown in FIG. 1 as an example. FIG. 1 exemplarily shows a schematic diagram of a system architecture applicable to this embodiment of the present application. As shown in FIG. 1 , in the 5G system architecture, a terminal device 101 may communicate with a network element 102 of an access network (AN) communicate with the core network. The terminal device 101 may be a device with a wireless transceiver function or a chip that may be provided in any device, and may also be referred to as user equipment (user equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station , remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal device 101 in this embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, Wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ), wireless terminals in smart cities, wireless terminals in smart homes, and so on.

The access network element 102, also referred to as a radio access network (RAN) network element, is mainly responsible for providing a wireless connection for the terminal device 101, ensuring reliable transmission of uplink and downlink data of the terminal device 101, and the like. The access network element 102 may be a gNB (generation Node B) in a 5G system, a global system of mobile communication (GSM) system or a base station (base station) in code division multiple access (code division multiple access, CDMA). transceiver station, BTS), can also be a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, or can be an evolved base station (evolutional node B, eNB) in an LTE system Wait.

A session management function (session management function, SMF) network element 103, the network element is mainly responsible for establishing a session for the terminal device 101, managing the session, and the like.

The user plane function (UPF) network element 104 has main functions including routing and forwarding of data packets, buffering of downlink data packets, and quality of service (Quality of Service, QoS) processing of user plane data.

Access and mobility management function (AMF) network element 105, the main functions include the termination point of the radio access network control plane, the termination point of non-access signaling, mobility management, access authorization or Authentication, etc.

The policy control function (policy control function, PCF) network element 106 is mainly responsible for functions such as establishment, deletion and modification of user plane transmission paths.

The data network (DN) 107 may refer to a network that provides services for the terminal device 101 .

It should be understood that FIG. 1 is only an example, and the system shown in FIG. 1 may also include other network elements, such as authentication server function (authentication server function, AUSF) network elements, and unified user data management (unified data management, UDM) network elements etc., which are not shown one by one here.

In this embodiment of the present application, the user plane transmission may refer to S1-U data transmission, or may refer to the user plane cellular internet of things (CIoT) evolved packet system (evolved packet s _y stem, EPS) optimized data transmission , may also refer to the combination of the above-mentioned S1-U data transmission and user plane CIoT EPS optimized data transmission. Control plane transmission may refer to control plane CIoT EPS optimized data transmission.

The network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

Referring to FIG. 2, a schematic flowchart of a data transmission method provided by an embodiment of the present application includes:

Step 201: The core network device determines to switch data of the terminal device from the control plane to the user plane for transmission.

In the embodiment of the present application, the core network device may be a mobility management entity (mobility management entity, MME) in a 4G communication system, or an SMF network element or an AMF network element in a 5G communication system, etc., which will not be described one by one here.

In step 201, the core network device may determine to switch the data of the terminal device from the control plane to the user plane transmission according to various methods, as described below.

Mode 1: The core network device detects the data transmitted by the terminal device on the control plane to obtain data statistics; when the data statistics meet the preset conditions, the core network device can determine to switch the data of the terminal device from the control plane to the user surface transmission.

Through the above method, the core network device can, according to the detected data statistical information, for example, the size and/or number of data packets transmitted by the terminal device on the control plane, so that when the data statistical information meets the preset conditions, the terminal device can The data is switched to the user plane transmission to improve the data transmission efficiency of the terminal equipment.

For example, when the data statistics information of the terminal device includes the data packet size transmitted by the terminal device on the control plane, the preset condition may be that the data packet size of the terminal device is greater than the first threshold.

Wherein, the data packet size of the terminal device may be the average value of the number of bytes included in the data packet of the terminal device detected by the core network device within a preset time length; Within the length of time, the detected maximum value of the number of bytes included in the data packet of the terminal device; it may also refer to the number of bytes included in the data packet of the terminal device detected by the core network device within the preset time length. The median of the number of sections (median), etc. The preset time length can be one hour or 10 minutes, which can be determined according to the actual situation.

For example, when the statistical information includes the number of data packets transmitted by the terminal device on the control plane, the preset condition is that the number is greater than the second threshold.

The number of data packets of the terminal device may be the number of data packets of the terminal device detected by the core network device within a preset time period.

For another example, the data statistics information includes the data packet size of the terminal device and the number of data packets of the terminal device. The preset condition is that the data packet size of the terminal device is greater than the first threshold and the number is greater than the second threshold.

It should be noted that the specific values of the first threshold and the second threshold may be determined according to actual conditions, which are not limited in this embodiment of the present application. For example, the size of data transmitted by an internet of things (IoT) device is generally 20 bytes in general, and the size of data transmitted in special cases is 200 bytes, so the first threshold can be set to be greater than 100.

In a second manner, the core network device receives the second indication information from the first device, and determines, according to the second indication information, to switch the data of the terminal device from the control plane to the user plane for transmission.

Wherein, the second indication information may be used to instruct to switch the data of the terminal device from the control plane to the user plane for transmission; or, the second indication information may be used to indicate the data of the terminal device transmitted on the control plane. The data packet size is greater than the first threshold; alternatively, the second indication information may be used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than the second threshold; alternatively, the second indication information may be It is used to indicate that the size of the data packets of the terminal equipment transmitted on the control plane is greater than the first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than the second threshold.

Exemplarily, the second indication information may be used as a trigger message, and after receiving the second indication information, the core network device may determine whether to switch the data of the terminal device to user plane transmission according to the capability of the terminal device. For example, the core network device determines that the network capability parameters of the terminal device can only establish three user plane channels. Before switching the data of the terminal device to the user plane for transmission, the core network device determines that three user plane channels have been established for the terminal device. The core network equipment can terminate or adjust the handover.

With the method provided in the second method, the core network device can determine to switch the data of the terminal device to the user plane transmission according to the second indication information. This method is simple to implement, and while improving the data transmission efficiency of the terminal device, reduces the The complexity of network device implementation.

It should be noted that, in this embodiment of the present application, the first device may be a serving gateway (serving gateway, SGW), a packet data network gateway (packet data network gateway, PGW), an access network element, the terminal device, an SMF NE, UPF NE, or AMF NE.

Step 202: The core network device sends first indication information to the terminal device.

The first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmitting uplink data.

The first indication information may also be referred to as an evolved packet system session management (evolved packet system session management, ESM) data transport message (data transport message), and the embodiment of the present application does not limit the name of the first indication information.

Optionally, when the data statistics information meets a preset condition, or after receiving the second indication information, the core network device sends the first indication information according to the load of the core network device. For example, when the load of the core network device is greater than the third threshold, the first indication information is sent; for another example, when the load of the core network device is less than or equal to the third threshold, the core network device does not send the first indication information. The value of the third threshold may be determined according to the actual situation, and may be configured to the core network device through the man-machine interface, which is not limited in this embodiment of the present application.

It should be noted that the first indication information may be a message sent by the core network device, or may be an information element carried in a message sent by the core network device, which is not limited in this embodiment of the present application. The specific implementation of the first indication information is not limited in this embodiment of the present application. For example, when the first indication information may be a message sent by the core network device, the message may be a message agreed between the core network device and the terminal device. For another example, when the first indication information is an information element carried in a message sent by the core network device, it may be a bit sequence with a preset value agreed between the core network device and the terminal device, which will not be described one by one here. .

Step 203: The terminal device receives the first indication information from the core network device.

Step 204: The terminal device stops transmitting uplink data through the control plane according to the first indication information.

Optionally, the above method further includes: after the establishment of the user plane tunnel is completed, the terminal device transmits uplink data through the user plane tunnel.

In the above method flow, after the core network device determines to switch data of the terminal device from the control plane to the user plane for transmission, it instructs the terminal device to stop transmitting uplink data through the first indication information, and the terminal device no longer transmits uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In the 4G system, when the data of the terminal equipment is transmitted in the user plane transmission mode, in the uplink direction, the terminal equipment can send the uplink data to the access network element, and then the access network element forwards it to the PGW; in the downlink direction , the PGW sends the downlink data of the terminal device to the access network element, and then the access network element sends it to the terminal device.

To this end, in the 4G system, the process of establishing a user plane tunnel for a terminal device can include two aspects: 1. Establish a wireless bearer between the terminal device and the access network element, so that the terminal device and the access network element can communicate with each other. 2. Determine the information of the uplink user plane tunnel and the information of the downlink user plane tunnel, so that the data of the terminal equipment can be transmitted between the access network element and the PGW. The embodiments of the present application will be described in detail below with reference to FIGS. 3 to 5 of the specification.

It should be noted that, in all the processes shown below, the names of messages or indication information transmitted between network elements are only examples, and do not represent any limitation on the messages or indication information.

As shown in FIG. 3 , it is a schematic diagram of a data transmission process according to an embodiment of the present application. In the process shown in FIG. 3 , the description is given by taking the core network device as an MME as an example. Before step 301 in FIG. 3 , it is assumed that the terminal device uses the control plane to transmit data. It should be noted that, on the control plane, both uplink data and downlink data of the terminal device are encapsulated in a non-access stratum (non-access stratum, NAS) protocol data unit (protocol data unit, PDU) for transmission.

Step 301: The MME detects the data transmitted by the terminal device on the control plane, and obtains the data statistics information of the terminal device.

For the content of the data statistics information, reference may be made to the description in step 201, and details are not repeated here.

Step 302: When the data statistics information satisfies the preset condition, the MME sends first indication information to the terminal device.

For the first indication information, reference may be made to the relevant description in the embodiment shown in FIG. 2 , and details are not repeated here. The first indication information may also be a stop UpLink data on control plane (stop UpLink data on control plane) message, and this embodiment of the present application does not limit the name of the first indication information, which will not be exemplified one by one here.

Exemplarily, in step 302, the MME may send the first indication information to the access network element, and then the access network element forwards the first indication information to the terminal device.

It should be noted that, after sending the first indication information, the MME releases the context of S11-U related to the control plane of the terminal device. For details, please refer to the following process. Exemplarily, after step 302, the above method may further include:

Step 303: The MME sends a release access bearers request (release access bearers request) message to the SGW.

The release access bearer request message is used to request to release all S11-U contexts related to the control plane of the terminal device. Among them, S11-U is the interface on the user plane between the MME and the SGW.

Exemplarily, the MME may send the unfinished uplink data of the terminal device to the SGW, and then send the access bearer release request message to the SGW.

Step 304: The SGW sends a release access bearers response (release access bearers response) message to the MME.

Exemplarily, after receiving the release access bearer request message, the SGW deletes all the saved S11-U contexts related to the control plane of the terminal device. If there is still downlink data of the terminal device in the SGW at this time, the SGW may buffer the downlink data and no longer send it to the terminal device.

It should be noted that, after receiving the release access bearer response message, the MME may instruct the access network element to allocate the context of the downlink user plane tunnel. For details, refer to the following process. Exemplarily, the above method may further include steps 305-309.

Step 305: The MME sends an S1-AP (application protocol, application protocol) initial context setup request (initial context setup request) message to the access network element.

The S1-AP initial context establishment request message is used to request to allocate the context of the downlink user plane tunnel for the terminal device. The context of the downlink user plane tunnel may also be referred to as downlink user plane tunnel information, and is referred to as the downlink user plane tunnel information hereinafter.

Optionally, the S1-AP initial context establishment request message includes the context of the uplink user plane. The context of the uplink user plane is allocated by the MME for the terminal device, and the context of the uplink user plane may also be referred to as uplink user plane tunnel information, which is referred to as uplink user plane tunnel information hereinafter. The information of the uplink user plane tunnel may include the Internet Protocol (IP) address of the SGW, the uplink tunnel endpoint identifier (tunnel endpoint identifier, TEID) and other information, and the access network element may send the information to the SGW according to the information of the uplink user plane tunnel Uplink data of the terminal device.

Step 306: After receiving the S1-AP initial context establishment request message, the access network element establishes a radio bearer between the access network element and the terminal device for the terminal device.

The specific process of establishing the radio bearer by the network element of the access network will not be repeated here, and the regulations in the existing LTE system may be referred to.

After the establishment of the wireless bearer in step 306 is completed, the terminal device can send uplink data to the access network element through the wireless bearer, and the access network element can also send the uplink data according to the IP address of the SGW, uplink TEID, etc. received in step 306 information, and forward the uplink data of the terminal device to the SGW.

Step 307: The access network element sends an S1-AP initial context setup complete (initial contextsetup complete) message to the MME.

Wherein, the S1-AP initial context establishment complete message may include downlink user plane tunnel information, and the downlink user plane tunnel information may include the IP address of the access network element, downlink TEID and other information.

Step 308: The MME sends a modify bearer request (modify bearer request) message to the SGW.

Wherein, the modification bearer request message may include information such as downlink user plane tunnel information.

Correspondingly, after receiving the modify bearer request message, the SGW can send the downlink data of the terminal device to the access network element according to the information of the downlink user plane tunnel.

Step 309: The S-GW sends a modify bearer response (modify bearer response) message to the MME.

Through the above process, the user plane tunnel of the terminal device is established, and the terminal device can transmit uplink data and receive downlink data through the user plane tunnel.

In the process shown in FIG. 3 , the MME determines, according to the detected data statistics information of the terminal equipment, that when the data statistics information meets the preset conditions, the data of the terminal equipment is switched from the control plane to the user plane for transmission, and the first instruction is passed. information, instructing the terminal equipment to stop transmitting uplink data. Through the above process, the data transmission efficiency of the terminal device can be improved, and at the same time, the problem of waste of transmission resources due to the need for repeated transmission of uplink data that fails to be transmitted can be avoided.

In this embodiment of the present application, the MME may also receive the second indication information from the SGW or the PGW, so as to switch the data of the terminal device to the user plane for transmission according to the second indication information. The following description will be made with reference to FIG. 4 .

As shown in FIG. 4 , it is a schematic diagram of a data transmission process according to an embodiment of the present application. In the flow shown in FIG. 4 , the description is given by taking the core network device as an MME as an example. Before step 401 in FIG. 4 , it is assumed that the terminal device uses the control plane to transmit data.

Step 401: The PGW receives the downlink data of the terminal device, and sends a downlink data notification (downlink data notification, DDN) message to the SGW.

The DDN message includes second indication information, and reference may be made to the relevant description in the embodiment shown in FIG. 2 for the second indication information. For example, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user surface transmission.

Optionally, the PGW detects the downlink data of the terminal device to obtain data statistical information; and sends the second indication information according to the data statistical information.

Exemplarily, when the data statistics information includes the data packet size value transmitted by the terminal device on the control plane, if the data packet size of the terminal device is greater than the first threshold, the PGW carries the second indication information in the DDN message. Alternatively, when the data statistics information includes the number of data packets transmitted by the terminal device on the control plane, if the number of data packets is greater than the second threshold, the PGW carries the second indication information in the DDN message. Or, when the data statistics information includes the size of the data packets transmitted by the terminal device on the control plane and the number of data packets transmitted by the terminal device on the control plane, if the size of the data packets of the terminal device is greater than the first threshold, and the number of data packets is greater than The second threshold, the PGW carries the second indication information in the DDN message.

It should be noted that the second indication information sent by the PGW is used by the MME to determine to switch the data of the terminal device to the user plane for transmission. For example, the second indication information is used to instruct to switch data of the terminal device to user plane transmission, and the MME may determine whether to switch according to the second indication information and the actual situation of the MME or the terminal device.

Step 402: The SGW forwards the DDN message to the MME.

It should be pointed out that the SGW can detect the downlink data of the terminal device, obtain data statistics, and send the second indication information to the MME according to the data statistics. At this time, the DNN message may not carry the second indication information. Steps 401 to Step 402 may not be executed, and is not limited.

Step 403: The MME sends the first indication information to the terminal device through the access network element according to the second indication information in the DDN message.

Exemplarily, after receiving the second indication information, the MME may send the first indication information when the load of the MME is greater than the third threshold. Of course, the MME may also directly send the first indication information after receiving the second indication information, without judging whether the load of the MME is greater than the third threshold, which is not limited in this embodiment of the present application.

Optionally, after the MME sends the first indication information, it performs steps such as sending a release access bearer request message to the SGW. For details, refer to the descriptions in steps 303 to 309 in FIG. 3 , which will not be repeated here.

In the process shown in FIG. 4 , the MME switches the data of the terminal device from the control plane to the user plane for transmission according to the second indication information sent by the SGW or the PGW, which can reduce the complexity of the MME implementation. The MME instructs the terminal device to stop transmitting uplink data through the first indication information, which can avoid uplink data transmission failure of the terminal device, and thus avoid the problem that uplink data that fails to be transmitted needs to be repeatedly sent, resulting in waste of transmission resources.

In this embodiment of the present application, the MME may also receive second indication information from the terminal device or the access network element, so as to switch the data of the terminal device to user plane transmission according to the second indication information. The following description will be made with reference to FIG. 5 .

As shown in FIG. 5 , a schematic diagram of a data transmission process provided by an embodiment of the present application is shown. In the flow shown in FIG. 5 , the description is given by taking the core network device as an MME as an example. Before step 501 in FIG. 5 , it is assumed that the terminal device uses the control plane to transmit data.

Step 501: The terminal device sends a control plane service request (control plane service request) message to an access network element.

Wherein, the control plane service request message includes the second indication information. For the second indication information, reference may be made to the relevant description in the embodiment shown in FIG. 2 , for example, the second indication information is used to instruct to switch the data of the terminal device to user plane transmission.

Exemplarily, when an application program in a terminal device needs to transmit a data packet with a relatively large amount of data such as video data, the terminal device sends a control plane service request message.

It should be noted that, in the second indication information sent by the terminal device, when the second indication information is used to instruct to switch the data of the terminal device to the user plane for transmission, the MME determines whether or not according to the second indication information and the actual situation of the network Switch without restriction.

Step 502: The network element of the access network sends a control plane service request message to the MME.

It should be pointed out that the network element of the access network can detect the downlink data of the terminal device, obtain data statistics information, and determine whether to send the second indication information to the MME according to the data statistics information. At this time, steps 501 to 502 may not be executed, or the control plane service request message in steps 501 and 502 does not carry the second indication information, which is not limited.

Step 503: The MME sends the first indication information to the terminal device according to the second indication information.

Exemplarily, after receiving the second indication information, the MME may send the first indication information to the terminal device through the access network element according to the indication information. For example, if the load of the MME is greater than the third threshold, the MME sends the first indication information. Of course, the MME can also judge whether to send the first indication information according to other factors, or the MME directly sends the first indication information after receiving the second indication information, without judging whether the load of the MME is greater than the third threshold. This is not limited.

Optionally, after the MME sends the first indication information, it performs steps such as sending a release access bearer request message to the SGW. For details, refer to the descriptions in steps 303 to 309 in FIG. 3 , which will not be repeated here.

In the process shown in FIG. 5 , the MME switches data of the terminal device from the control plane to the user plane for transmission according to the second indication information sent by the terminal device or the access network element, which can reduce the complexity of MME implementation. The MME instructs the terminal device to stop transmitting uplink data through the first indication information, which can avoid uplink data transmission failure of the terminal device, and thus avoid the problem that uplink data that fails to be transmitted needs to be repeatedly sent, resulting in waste of transmission resources.

In the 5G system, when the data of the terminal device is transmitted on the user plane, in the uplink direction, the terminal device sends the uplink data to the access network element, and then the access network element forwards it to the UPF network element; in the downlink direction, the same The upward direction is opposite and will not be repeated here.

To this end, in the 5G system, the process of establishing a user plane tunnel for a terminal device can include two aspects: 1. Establish a wireless bearer between the site device and the access network element, so that the terminal device and the access network element can communicate with each other. 2. Determine the core network tunnel information (core netwok tunnel info) and the access network tunnel information (access netwok tunnel info), so that terminal equipment can be transmitted between the access network element and the UPF network element The data. The core network tunnel information includes information such as the core network address of the N3 tunnel corresponding to the protocol data unit (protocol data unit, PDU) session; the access network tunnel information includes information such as the access network address of the N3 tunnel corresponding to the PDU session.

The following description will be given by taking the core network device as an AMF network element or an SMF network element as an example with reference to FIGS. 6 to 7 in the specification.

As shown in FIG. 6 , it is a schematic diagram of a data transmission process according to an embodiment of the present application. In the process shown in FIG. 6 , the description is given by taking the core network device as an AMF network element as an example. Before step 601 in FIG. 6 , it is assumed that the terminal device is using the control plane to transmit data.

Step 601: The AMF network element determines to switch the data of the terminal device from the control plane to the user plane for transmission, and sends first indication information to the terminal device.

The first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmitting uplink data.

Optionally, the AMF network element detects the data of the terminal device, obtains data statistical information, and determines to switch the data of the terminal device to the user plane for transmission according to the data statistical information; or, the AMF network element receives the second indication information from the first device. , and according to the second indication request, it is determined to switch the data of the terminal device to the user plane for transmission. For details, please refer to the previous related description, which will not be repeated here.

It should be noted that the AMF network element may send the first indication information to the terminal device through the access network network element, and details are not repeated here.

Step 602: The AMF network element sends a first request message to the SMF network element.

Wherein, the first request message includes user plane transmission indication information, and the user plane transmission indication information is used to instruct the SMF network element to switch the data of the terminal device to the user plane transmission.

It should be noted that, if the uplink data of the AMF network element and the terminal equipment has not been transmitted, the user plane transmission indication information may be sent after the AMF network element transmits the uplink data to the SMF network element.

Step 603: The SMF network element sends a handover request message to the UPF network element according to the user plane transmission indication information in the first request message.

The handover request message may include at least one of the following functions:

It is used to request to stop sending downlink data of the terminal device; it is used to request to delete the control plane data transmission tunnel information corresponding to the terminal device; or the core network tunnel information of the user plane tunnel to be requested to be allocated to the terminal device.

The control plane data transmission tunnel information may be the control plane data transmission tunnel information between the UPF network element and the AMF network element, or the control plane data transmission tunnel information between the UPF network element and the SMF network element.

It should be noted that, if the handover request message is not used to request deletion of the control plane data transmission tunnel information corresponding to the terminal equipment, the UPF network element can retain the control plane data transmission tunnel information corresponding to the terminal equipment, so that the received downlink data of the terminal equipment can be transferred. The data is sent to the SMF network element through the control plane tunnel between the SMF network element and the UPF network element, and the SMF network element buffers the downlink data of the terminal device. After the user plane tunnel of the terminal device is established, the buffered downlink data can be transmitted to the terminal device through the user plane tunnel.

Correspondingly, if the handover request message is not used for requesting to allocate the core network tunnel information of the user plane tunnel to the terminal device, the SMF network element may allocate the core network tunnel information to the terminal device.

It should be noted that, if the SMF network element receives the uplink data of the terminal device sent by the AMF network element, the handover request message may be sent after the SMF network element transmits the uplink data to the UPF network element.

Step 604: The UPF network element sends a handover response message to the SMF network element.

Exemplarily, a control plane tunnel exists between the UPF network element and the SMF network element or the AMF network element. Therefore, if the handover request message is used to request to delete the control plane data transmission tunnel information corresponding to the terminal device, the UPF network element can delete the UPF. Information about the data transmission tunnel of the control plane between the network element and the SMF network element, or delete the information of the data transmission tunnel of the control plane between the UPF network element and the AMF network element.

Optionally, in this embodiment of the present application, the core network tunnel information of the terminal device may be allocated by the SMF network element, or may be allocated by the UPF network element. When the core network tunnel information is allocated by the UPF network element, the handover response message also includes the core network tunnel information.

Step 605: The SMF network element sends a first response message to the AMF network element.

The first response message includes core network tunnel information of the terminal device.

Step 606: The AMF network element sends a session request message to the access network element.

The session request message may include core network tunnel information of the terminal device.

Step 607: The access network element establishes a radio bearer between the access network element and the terminal device.

The specific establishment process in step 607 will not be repeated, and the description in the existing standard may be referred to.

Optionally, the above method further includes: after the establishment of the radio bearer between the network element of the access network and the terminal device is completed, the terminal device sends uplink data to the network element of the access network.

Step 608: The access network element sends a session response message to the AMF network element.

The session response message may include access network tunnel information of the terminal device.

Step 609: The AMF network element sends an update request message to the SMF network element.

The update request message may include the access network tunnel information of the terminal device.

Step 610: The SMF network element sends a modification request message to the UPF network element.

The modification request message may include information about the user plane tunnel of the terminal device.

At this time, the above method may further include: the UPF network element sends the downlink data of the terminal device to the terminal device according to the access network tunnel information of the terminal device.

Step 611: The UPF network element sends a modification response message to the SMF network element.

Step 612: The SMF network element sends an update response message to the AMF network element.

In the process shown in FIG. 6 , the AMF network element determines, according to the detected data statistics information of the terminal equipment, that when the data statistics information meets the preset conditions, the data of the terminal equipment is switched from the control plane to the user plane transmission, which can improve the performance of the terminal equipment. The data transfer efficiency of the device. At the same time, the AMF network element instructs the terminal device to stop transmitting uplink data through the first indication information, which can avoid the uplink data transmission failure of the terminal device, and thus avoid the problem of repeated transmission of uplink data that fails to be transmitted, resulting in waste of transmission resources.

As shown in FIG. 7 , a schematic diagram of a data transmission process provided by an embodiment of the present application is shown. In the flow shown in FIG. 7 , description is given by taking the core network device as an SMF network element as an example. Before step 701 in FIG. 7 , it is assumed that the terminal device uses the control plane to transmit data.

Step 701: The SMF network element determines to switch the data of the terminal device from the control plane to the user plane for transmission, and sends the first indication information to the terminal device.

Exemplarily, the SMF network element may detect the data of the terminal device, obtain data statistical information, and determine to switch the data of the terminal device to the user plane for transmission according to the data statistical information; the SMF network element may also receive the second instruction from the first device. information, and according to the second indication information, it is determined to switch the data of the terminal device to the user plane for transmission. For details, refer to the previous description, which will not be repeated here.

It should be noted that the first indication information sent by the SMF network element to the terminal device passes through the AMF network element and the access network element, that is, the SMF network element sends the first indication information to the AMF network element, and the AMF network element sends the first indication information to the AMF network element. The indication information is forwarded to the access network element, and then the access network element forwards the first indication information to the terminal device.

Step 702: The SMF network element sends a handover request message to the UPF network element.

Step 703: The UPF network element sends a handover response message to the SMF network element.

Exemplarily, a control plane tunnel exists between the UPF network element and the SMF network element or the AMF network element. Therefore, if the handover request message is used to request to delete the control plane data transmission tunnel information corresponding to the terminal device, the UPF network element can delete the UPF. The control plane data transmission tunnel information between the network element and the SMF network element, or the control plane data transmission tunnel information between the UPF network element and the AMF network element is deleted.

Optionally, the core network tunnel information of the terminal device may be allocated by the SMF network element or by the UPF network element. When the core network tunnel information is allocated by the UPF network element, the handover response message also includes the core network tunnel information.

Step 704: The SMF network element sends a handover instruction message to the AMF network element.

The handover instruction message includes core network tunnel information of the terminal device.

Step 705: The AMF network element sends a session request message to the access network element.

The session request message may include core network tunnel information of the terminal device.

Step 706: The access network element establishes a radio bearer between the access network element and the terminal device.

Wherein, the specific establishment process in step 706 is not repeated here, and for details, reference may be made to the description in the existing standard.

Optionally, the above method further includes: after the establishment of the radio bearer between the network element of the access network and the terminal device is completed, the terminal device sends uplink data to the network element of the access network.

Step 707: The access network element sends a session response message to the AMF network element.

The session response message may include access network tunnel information of the terminal device.

Step 708: The AMF network element sends an update request message to the SMF network element.

The update request message may include the access network tunnel information of the terminal device.

Step 709: The SMF network element sends a modification request message to the UPF network element.

The modification request message may include the access network tunnel information of the terminal device.

At this time, the above method may further include: the UPF network element sends the downlink data of the terminal device to the terminal device according to the access network tunnel information of the terminal device.

Step 710: The UPF network element sends a modification response message to the SMF network element.

Step 711: The SMF network element sends an update response message to the AMF network element.

In the process shown in FIG. 7 , the SMF network element determines, according to the detected data statistics information of the terminal equipment, that when the data statistics information meets the preset conditions, the data of the terminal equipment is switched from the control plane to the user plane transmission, which can improve the efficiency of the terminal equipment. The data transfer efficiency of the device. At the same time, the SMF network element instructs the terminal device to stop transmitting uplink data through the first indication information, which can avoid the uplink data transmission failure of the terminal device, and thus avoid the problem of repeated transmission of uplink data that fails to be transmitted, resulting in waste of transmission resources.

In this embodiment of the present application, the core network device may also send the first indication information to the terminal device when it is determined to trigger the establishment of a user plane bearer for the terminal device, where the user plane bearer is used to transmit data of the terminal device, and the user plane bearer may be Refers to the S1-U bearer. The following description will be made with reference to FIG. 8 .

As shown in FIG. 8 , a schematic diagram of a data transmission process provided by an embodiment of the present application is shown. In the process shown in FIG. 8 , the core network device is an MME and the user plane bearer is an S1-U bearer as an example for description, and other situations are not repeated. Before step 801 in FIG. 8 , it is assumed that the terminal device uses the control plane to transmit data.

Step 801: The MME determines to trigger the establishment of an S1-U bearer for the terminal device.

The MME can detect the data transmitted by the terminal device on the control plane, obtain the data statistics of the terminal device, and determine to trigger the establishment of an S1-U bearer for the terminal device when the data statistics meet the preset conditions. The MME may also receive the second indication information from the first device, and determine, according to the second indication information, to trigger the establishment of the S1-U bearer for the terminal device. For details, reference may be made to the description in step 201, which will not be repeated here.

Step 802: The MME sends the first indication information to the terminal device.

The first indication information may also be called an ESM data transmission message, and other content of the first indication information may refer to the relevant description in the embodiment shown in FIG. 2 , which will not be repeated here.

Exemplarily, in step 802, the MME may send the first indication information to the access network element, and then the access network element forwards the first indication information to the terminal device.

Step 803: The terminal device sends a response message to the MME.

The response message is used to indicate that the terminal device has successfully received the first indication information.

It should be noted that, after sending the first indication information, the MME releases the context of S11-U related to the control plane of the terminal device. For details, please refer to the following process. Exemplarily, after step 802, the above method may further include:

Step 804: The MME sends a release access bearer request message to the SGW.

The release access bearer request message is used to request to release all S11-U contexts related to the control plane of the terminal device.

Exemplarily, the MME may send the unfinished uplink data of the terminal device to the SGW, and then send the access bearer release request message to the SGW.

Step 805: The SGW sends a release access bearer response message to the MME.

Exemplarily, after receiving the release access bearer request message, the SGW deletes all the saved S11-U contexts related to the control plane of the terminal device. If there is still downlink data of the terminal device in the SGW at this time, the SGW may buffer the downlink data and no longer send it to the terminal device.

It should be noted that, after receiving the release access bearer response message, the MME may instruct the access network element to allocate the context of the downlink user plane tunnel. For details, refer to the following process. Exemplarily, the above method may further include steps 806-810.

Step 806: The MME sends an S1-AP initial context establishment request message to the access network element.

Wherein, the S1-AP initial context establishment request message is used to request the information of allocating downlink user plane tunnels for the terminal equipment.

Optionally, the S1-AP initial context establishment request message includes the context of the uplink user plane. The context of the uplink user plane is allocated by the MME for the terminal device, and the access network element can send the uplink data of the terminal device to the SGW according to the information of the uplink user plane tunnel.

Step 807: After receiving the S1-AP initial context establishment request message, the access network element establishes a radio bearer between the access network element and the terminal device for the terminal device.

The specific process of establishing the radio bearer by the network element of the access network will not be repeated here, and the regulations in the existing LTE system may be referred to.

After the establishment of the radio bearer in step 807 is completed, the terminal device may send uplink data to the access network element through the radio bearer, and the access network element may also, according to the information of the uplink user plane tunnel received in step 807, The uplink data of the terminal device is forwarded to the SGW.

Step 808: The access network element sends an S1-AP initial context establishment complete message to the MME.

Wherein, the S1-AP initial context establishment complete message may include downlink user plane tunnel information, and the downlink user plane tunnel information may include the IP address of the access network element, downlink TEID and other information.

Step 809: The MME sends a modify bearer request message to the SGW.

Wherein, the modification bearer request message may include information such as downlink user plane tunnel information.

Correspondingly, after receiving the modify bearer request message, the SGW can send the downlink data of the terminal device to the access network element according to the information of the downlink user plane tunnel.

Step 810: The S-GW sends a modify bearer response message to the MME.

Through the above process, the user plane tunnel of the terminal device is established, and the terminal device can transmit uplink data and receive downlink data through the user plane tunnel.

In the process shown in FIG. 8 , when the MME determines to trigger the establishment of an S1-U bearer for the terminal device according to the detected data statistics information of the terminal device or the received second indication information, the MME sends the first indication information to the terminal device, indicating The terminal device stops transmitting uplink data, thereby avoiding the failure of uplink data transmission of the terminal device, which can improve the data transmission efficiency of the terminal device, and at the same time can avoid the problem of waste of transmission resources caused by repeated transmission of uplink data that fails to be transmitted.

As shown in FIG. 9 , a schematic structural diagram of a communication device is provided in an embodiment of the present application. The communication device may be a core network device. For example, in a 4G communication system, the core network device may be an MME; in a 5G communication system, The core network device may be an SMF network element or an AMF network element. In a 4G communication system, the communication apparatus may be used to perform the actions of the MME in the above method embodiments, and in a 5G communication system, the communication apparatus may be used to perform the actions of the SMF network element or the AMF in the above method embodiments. The communication device 900 includes: a processing unit 901 and a transceiver unit 902 .

a processing unit 901, configured to determine to switch data of the terminal device from the control plane to the user plane for transmission;

A transceiver unit 902, configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to indicate the The terminal equipment stops transmitting uplink data.

After the above-mentioned communication apparatus determines to switch the data of the terminal equipment to the user plane for transmission, the first indication information is used to instruct the terminal equipment to stop transmitting uplink data, and the terminal equipment does not transmit uplink data any more. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an optional implementation manner, the processing unit 901 is specifically configured to:

Obtain data statistics information of the terminal device according to the data of the terminal device transmitted through the control plane;

When the data statistical information satisfies the preset condition, it is determined to switch the data of the terminal device from the control plane to the user plane for transmission.

In an optional implementation manner, the data statistical information includes the data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; or, the data statistical information Including the number of data packets of the terminal device, and the preset condition is that the number is greater than the second threshold; or, the data statistical information includes the data packet size of the terminal device and the data packet of the terminal device. The preset condition is that the size of the data packet of the terminal device is greater than the first threshold, and the number is greater than the second threshold.

In the above solution, the communication device may, according to the detected statistical information of the data, for example, the size and/or number of data packets transmitted by the terminal equipment on the control plane, so that when the statistical information of the data meets the preset conditions, the terminal equipment The data is switched to the user plane transmission to improve the data transmission efficiency of the terminal equipment.

In an optional implementation manner, the processing unit 901 is specifically configured to:

When receiving the second indication information from the first device, determine to switch the data of the terminal device from the control plane to the user plane for transmission;

Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane for transmission; or, the second indication information is used to indicate the data of the terminal device transmitted on the control plane. The data packet size is greater than the first threshold; or, the second indication information is used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than the second threshold; or, the second indication information is used to Indicates that the size of the data packets of the terminal equipment transmitted on the control plane is greater than a first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than a second threshold.

In the above solution, the communication device can determine to switch the data of the terminal equipment to the user plane transmission according to the second indication information. This method is simple to implement, and while improving the data transmission efficiency of the terminal equipment, it reduces the amount of time required by the core network equipment. the complexity.

In an optional implementation manner, the first device is any of the following:

SGW;

PGW;

access network element;

the terminal device;

SMF network element;

UPF network element;

AMF network element.

In an optional implementation manner, before the transceiver unit 902 sends the first indication information to the terminal device, the processing unit 901 is further configured to:

It is determined that the load of the core network device is greater than the third threshold.

In the above solution, the communication device determines whether to send the first indication information according to its own load, which can ensure the load balance of the communication device.

Referring to FIG. 10 , an embodiment of the present application further provides a communication device. The communication device may be a core network device or a chip or a system-on-chip located in the core network device. In a 4G communication system, the communication device may be used to execute the above For the actions of the MME in the method embodiments, in a 5G communication system, the communication apparatus may be configured to perform the actions of the SMF network element or the AMF in the above method embodiments. The communication apparatus 1000 includes: a processor 1001 , a communication interface 1002 , and a memory 1003 .

The memory 1003 can be used to store program instructions, and the processor 1001 calls the program instructions stored in the memory 1003 to execute: determine to switch the data of the terminal device from the control plane to the user plane for transmission;

The communication interface 1002 is configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to indicate that the The terminal equipment stops transmitting uplink data.

In the above solution, after the communication device determines to switch the data of the terminal equipment to the user plane for transmission, it instructs the terminal equipment to stop transmitting uplink data through the first indication information, and the terminal equipment does not transmit uplink data any more. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an optional implementation manner, the processor 1001 is specifically configured to:

Obtain data statistics information of the terminal device according to the data of the terminal device transmitted through the control plane;

When the data statistical information satisfies the preset condition, it is determined to switch the data of the terminal device from the control plane to the user plane for transmission.

In an optional implementation manner, the data statistical information includes the data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; or, the data statistical information Including the number of data packets of the terminal device, and the preset condition is that the number is greater than the second threshold; or, the data statistical information includes the data packet size of the terminal device and the data packet of the terminal device. The preset condition is that the size of the data packet of the terminal device is greater than the first threshold, and the number is greater than the second threshold.

In the above solution, the communication device may, according to the detected statistical information of the data, for example, the size and/or number of data packets transmitted by the terminal equipment on the control plane, so that when the statistical information of the data meets the preset conditions, the terminal equipment The data is switched to the user plane transmission to improve the data transmission efficiency of the terminal equipment.

In an optional implementation manner, the processor 1001 is specifically configured to:

When receiving the second indication information from the first device, determine to switch the data of the terminal device from the control plane to the user plane for transmission;

Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane transmission;

Alternatively, the second indication information is used to indicate that the size of the data packet of the terminal device transmitted on the control plane is greater than a first threshold; or, the second indication information is used to indicate that all data packets transmitted on the control plane The number of data packets of the terminal device is greater than the second threshold; or, the second indication information is used to indicate that the size of the data packets of the terminal device transmitted on the control plane is greater than the first threshold, and the size of the data packets on the control plane is greater than the first threshold. The number of transmitted data packets of the terminal device is greater than the second threshold.

In the above solution, the communication device can determine to switch the data of the terminal equipment to the user plane transmission according to the second indication information. This method is simple to implement, and while improving the data transmission efficiency of the terminal equipment, it reduces the amount of time required by the core network equipment. the complexity.

In an optional implementation manner, the first device is any of the following:

SGW;

PGW;

access network element;

the terminal device;

SMF network element;

UPF network element;

AMF network element.

In an optional implementation manner, before the communication interface 1002 sends the first indication information to the terminal device, the processor 1001 is further configured to:

It is determined that the load of the core network device is greater than the third threshold.

In the above solution, the communication device determines whether to send the first indication information according to its own load, which can ensure the load balance of the communication device.

As shown in FIG. 11 , a schematic structural diagram of a communication device is provided in an embodiment of the application. The communication device may be a terminal device, or one or more chips located in the terminal device, or a system-on-chip. The communication device may be For performing the actions of the terminal device in the above method embodiments, the communication apparatus 1100 includes: a receiving unit 1101 and a sending unit 1102 .

The receiving unit 1101 is configured to receive first indication information from a core network device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmit uplink data;

The sending unit 1102 is configured to stop transmitting uplink data through the control plane according to the first indication information.

After receiving the first indication information sent by the core network device, the above communication apparatus does not transmit uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

FIG. 12 is a schematic structural diagram of a communication apparatus provided by an embodiment of the present application. The communication apparatus shown in FIG. 12 may be a hardware circuit implementation of the communication apparatus shown in FIG. 11 . The communication apparatus may be configured to perform the actions of the terminal device in the foregoing method embodiments. For convenience of explanation, FIG. 12 only shows the main components of the communication device. As shown in FIG. 12 , the communication device 1210 includes a processor 1201 , a memory 1202 , a transceiver 1203 , an antenna 1204 and an input/output device 1205 . The processor 1201 is mainly used to process communication protocols and communication data, control the communication device, execute software programs, and process data of the software programs, for example, to support the communication device to perform the actions described in the above method embodiments. The memory 1202 is primarily used to store software programs and data. The transceiver 1203 is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna 1204 is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input and output device 1205, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by the user and outputting data to the user.

The memory 1202 can be used to store program instructions, and the processor 1201 calls the program instructions stored in the memory 1202 to execute:

The transceiver 1203 receives first indication information from a core network device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the The terminal device stops transmitting uplink data; it is used for stopping transmitting uplink data through the control plane according to the first indication information.

In the above solution, after receiving the first indication information sent by the core network device, the communication apparatus does not transmit uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

As shown in FIG. 13 , a schematic structural diagram of a communication device is provided in an embodiment of the present application. The communication device may be a core network device. For example, in a 4G communication system, the core network device may be an MME; in a 5G communication system, The core network device may be an SMF network element or an AMF network element. In a 4G communication system, the communication apparatus may be used to perform the actions of the MME in the above method embodiments, and in a 5G communication system, the communication apparatus may be used to perform the actions of the SMF network element or the AMF in the above method embodiments. The communication device 1300 includes: a processing unit 1301 and a transceiver unit 1302 .

A processing unit 1301, configured to determine a trigger to establish a user plane bearer for a terminal device, where the user plane bearer is used to transmit data of the terminal device;

The transceiver unit 1302 is configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to indicate that the The terminal equipment stops transmitting uplink data.

After the above-mentioned communication apparatus determines that the establishment of a user plane bearer for the terminal device is triggered, the first indication information is used to instruct the terminal device to stop transmitting uplink data, and the terminal device no longer transmits uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an optional implementation manner, the processing unit 1301 is specifically configured to:

Obtain data statistics information of the terminal device according to the data of the terminal device transmitted through the control plane;

When the data statistical information satisfies the preset condition, it is determined to switch the data of the terminal device from the control plane to the user plane for transmission.

In an optional implementation manner, the data statistical information includes the data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; or, the data statistical information Including the number of data packets of the terminal device, and the preset condition is that the number is greater than the second threshold; or, the data statistical information includes the data packet size of the terminal device and the data packet of the terminal device. The preset condition is that the size of the data packet of the terminal device is greater than the first threshold, and the number is greater than the second threshold.

In the above solution, the communication device can trigger the establishment of the terminal device based on the detected data statistical information, for example, the size and/or number of data packets transmitted by the terminal device on the control plane, when the data statistical information meets a preset condition. User plane bearer, improve the data transmission efficiency of terminal equipment.

In an optional implementation manner, the processing unit 1301 is specifically configured to:

When receiving the second indication information from the first device, determine to trigger the establishment of a user plane bearer for the terminal device;

Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane for transmission; or, the second indication information is used to indicate the data of the terminal device transmitted on the control plane. The data packet size is greater than the first threshold; or, the second indication information is used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than the second threshold; or, the second indication information is used to Indicates that the size of the data packets of the terminal equipment transmitted on the control plane is greater than a first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than a second threshold.

In the above solution, the communication device can determine to trigger the establishment of a user plane bearer for the terminal device according to the second indication information, which is simple to implement, and reduces the complexity of core network device implementation while improving the data transmission efficiency of the terminal device.

In an optional implementation manner, the first device is any of the following:

SGW;

PGW;

access network element;

the terminal device;

SMF network element;

UPF network element;

AMF network element.

In an optional implementation manner, before the transceiver unit 1302 sends the first indication information to the terminal device, the processing unit 1301 is further configured to:

It is determined that the load of the core network device is greater than the third threshold.

In the above solution, the communication device determines whether to send the first indication information according to its own load, which can ensure the load balance of the communication device.

Referring to FIG. 14 , an embodiment of the present application further provides a communication device. The communication device may be a core network device or a chip or a system-on-a-chip located in the core network device. In a 4G communication system, the communication device may be used to execute each of the above For the actions of the MME in the method embodiments, in a 5G communication system, the communication apparatus may be configured to perform the actions of the SMF network element or the AMF in the above method embodiments. The communication device 1400 includes: a processor 1401 , a communication interface 1402 , and a memory 1403 .

The memory 1403 can be used to store program instructions, and the processor 1401 invokes the program instructions stored in the memory 1403, and executes: determining to trigger the establishment of a user plane bearer for the terminal device, and the user plane bearer is used to transmit the data of the terminal device;

The communication interface 1402 is used to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to indicate that the The terminal equipment stops transmitting uplink data.

In the above solution, after triggering the establishment of a user plane bearer for the terminal device, the communication device instructs the terminal device to stop transmitting uplink data through the first indication information, and the terminal device no longer transmits uplink data. Therefore, in the process of switching from the control plane to the user plane, the problem of transmission failure of uplink data sent by the terminal device can be avoided, and at the same time, the problem of waste of transmission resources caused by the need to repeatedly transmit uplink data which fails to be transmitted can be avoided.

In an optional implementation manner, the processor 1401 is specifically configured to:

Obtain data statistics information of the terminal device according to the data of the terminal device transmitted through the control plane;

When the data statistics information satisfies the preset condition, it is determined to trigger the establishment of a user plane bearer for the terminal device.

In an optional implementation manner, the data statistical information includes the data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; or, the data statistical information Including the number of data packets of the terminal device, and the preset condition is that the number is greater than the second threshold; or, the data statistics information includes the data packet size of the terminal device and the data packet of the terminal device. The preset condition is that the data packet size of the terminal device is greater than the first threshold, and the number is greater than the second threshold.

In the above solution, the communication device can trigger the establishment of the terminal device based on the detected data statistical information, for example, the size and/or number of data packets transmitted by the terminal device on the control plane, when the data statistical information meets a preset condition. User plane bearer, improve the data transmission efficiency of terminal equipment.

In an optional implementation manner, the processor 1401 is specifically configured to:

When receiving the second indication information from the first device, determine to trigger the establishment of a user plane bearer for the terminal device;

Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane transmission;

Alternatively, the second indication information is used to indicate that the size of the data packet of the terminal device transmitted on the control plane is greater than a first threshold; or, the second indication information is used to indicate that all data packets transmitted on the control plane The number of data packets of the terminal device is greater than the second threshold; or, the second indication information is used to indicate that the size of the data packets of the terminal device transmitted on the control plane is greater than the first threshold, and the size of the data packets on the control plane is greater than the first threshold. The number of transmitted data packets of the terminal device is greater than the second threshold.

In the above solution, the communication device can determine to trigger the establishment of a user plane bearer for the terminal device according to the second indication information, which is simple to implement, and reduces the complexity of core network device implementation while improving the data transmission efficiency of the terminal device.

In an optional implementation manner, the first device is any of the following:

SGW;

PGW;

access network element;

the terminal device;

SMF network element;

UPF network element;

AMF network element.

In an optional implementation manner, before the communication interface 1402 sends the first indication information to the terminal device, the processor 1401 is further configured to:

It is determined that the load of the core network device is greater than the third threshold.

In the above solution, the communication device determines whether to send the first indication information according to its own load, which can ensure the load balance of the communication device.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (19)

1. a data transmission method, is characterized in that, comprises: The core network device determines to switch the data of the terminal device from the control plane to the user plane for transmission; The core network device sends first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the The terminal equipment stops transmitting uplink data. 2 . The method according to claim 1 , wherein the determination by the core network device to switch the data of the terminal device from the control plane to the user plane transmission comprises: 2 . obtaining, by the core network device, data statistics of the terminal device according to the data of the terminal device transmitted through the control plane; When the data statistical information meets a preset condition, the core network device determines to switch the data of the terminal device from the control plane to the user plane for transmission. 3. The method according to claim 2, wherein the data statistical information comprises a data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; Alternatively, the data statistical information includes the number of data packets of the terminal device, and the preset condition is that the number is greater than a second threshold; Or, the data statistical information includes the data packet size of the terminal device and the number of data packets of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold, and the number of greater than the second threshold. 4 . The method according to claim 1 , wherein the determination by the core network device to switch the data of the terminal device from the control plane to the user plane transmission comprises: 4 . When the core network device receives the second indication information from the first device, the core network device determines to switch the data of the terminal device from the control plane to the user plane for transmission; Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane transmission; Alternatively, the second indication information is used to indicate that the size of the data packet of the terminal device transmitted on the control plane is greater than the first threshold; Alternatively, the second indication information is used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than a second threshold; Or, the second indication information is used to indicate that the size of the data packets of the terminal equipment transmitted on the control plane is greater than the first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than the first threshold Two thresholds. 5. The method according to claim 4, wherein the first device is any of the following: Serving gateway SGW; Packet data gateway PGW; access network element; the terminal device; Session management function SMF network element; User plane function UPF network element; or, Access and mobility management functions AMF network elements. The method according to any one of claims 1 to 5, wherein before the core network device sends the first indication information to the terminal device, the method further comprises: The core network device determines that the load of the core network device is greater than a third threshold. 7. A data transmission method, characterized in that, comprising: The terminal device receives first indication information from the core network device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmit uplink data; The terminal device stops transmitting uplink data through the control plane according to the first indication information. 8. A data transmission method, comprising: The core network device determines to trigger the establishment of a user plane bearer for the terminal device, where the user plane bearer is used to transmit data of the terminal device; The core network device sends first indication information to the terminal device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the The terminal equipment stops transmitting uplink data. 9. A communication device, comprising: a processing unit, configured to determine to switch data of the terminal device from the control plane to the user plane for transmission; a transceiver unit, configured to send first indication information to the terminal equipment, where the first indication information is used to instruct the terminal equipment to stop transmitting uplink data through the control plane, or the first indication information is used to indicate the The terminal equipment stops transmitting uplink data. 10. The communication device according to claim 9, wherein the processing unit is specifically configured to: Obtain data statistics information of the terminal device according to the data of the terminal device transmitted through the control plane; When the data statistics information satisfies the preset condition, it is determined to switch the data of the terminal device from the control plane to the user plane for transmission. 11 . The communication device according to claim 10 , wherein the data statistical information includes a data packet size of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold; 11 . Alternatively, the data statistics information includes the number of data packets of the terminal device, and the preset condition is that the number is greater than a second threshold; Or, the data statistical information includes the data packet size of the terminal device and the number of data packets of the terminal device, and the preset condition is that the data packet size of the terminal device is greater than a first threshold, and the number of greater than the second threshold. 12. The communication device according to claim 9, wherein the processing unit is specifically configured to: When receiving the second indication information from the first device, determine to switch the data of the terminal device from the control plane to the user plane for transmission; Wherein, the second indication information is used to instruct to switch the data of the terminal device from the control plane to the user plane transmission; Alternatively, the second indication information is used to indicate that the size of the data packet of the terminal device transmitted on the control plane is greater than the first threshold; Alternatively, the second indication information is used to indicate that the number of data packets of the terminal device transmitted on the control plane is greater than a second threshold; Or, the second indication information is used to indicate that the size of the data packets of the terminal equipment transmitted on the control plane is greater than the first threshold, and the number of data packets of the terminal equipment transmitted on the control plane is greater than the first threshold Two thresholds. 13. The communication device according to claim 12, wherein the first device is any one of the following: Serving gateway SGW; Packet data gateway PGW; access network element; the terminal device; Session management function SMF network element; User plane function UPF network element; or, Access and mobility management functions AMF network elements. The communication apparatus according to any one of claims 9 to 13, wherein before the transceiver unit sends the first indication information to the terminal device, the processing unit is further configured to: It is determined that the load of the core network device is greater than a third threshold. 15. A communication device, comprising: a receiving unit, configured to receive first indication information from the core network device, where the first indication information is used to instruct the terminal device to stop transmitting uplink data through the control plane, or the first indication information is used to instruct the terminal device to stop transmitting uplink data; A sending unit, configured to stop transmitting uplink data through the control plane according to the first indication information. 16. A communication device, comprising: a processing unit, configured to determine a trigger to establish a user plane bearer for a terminal device, where the user plane bearer is used to transmit data of the terminal device; a transceiver unit, configured to send first indication information to the terminal equipment, where the first indication information is used to instruct the terminal equipment to stop transmitting uplink data through the control plane, or the first indication information is used to indicate the The terminal equipment stops transmitting uplink data. 17. A computer-readable storage medium, wherein computer-readable instructions are stored in the computer-readable storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute the instructions of claims 1-8. any of the methods described. 18. A computer program product, characterized in that, when a computer reads and executes the computer program product, the computer is caused to execute the method according to any one of claims 1-8. 19. A chip, characterized in that, the chip is connected to a memory, and is used for reading and executing a software program stored in the memory, so as to implement the method according to any one of claims 1-8.