CN111479292A

CN111479292A - Data transmission method and device

Info

Publication number: CN111479292A
Application number: CN201910063625.5A
Authority: CN
Inventors: 耿婷婷; 严乐; 曾清海
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2020-07-31
Anticipated expiration: 2039-01-23
Also published as: CN111479292B; WO2020151585A1

Abstract

The application provides a data transmission method and device. The access network equipment receives the target data and selects one target transmission node equipment from the at least two transmission node equipment for the target data according to the selection strategy, wherein each transmission node equipment of the at least two transmission node equipment and the access network equipment are provided with a data channel, so that the access network equipment can directly send the target data to a data network through the selected target transmission node equipment.

Description

Data transmission method and device

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for data transmission.

Background

Under a conventional data transmission architecture, data of a terminal device communicates with a Data Network (DN) through a base station and a fixed User Plane Function (UPF). Specifically, after the terminal device is accessed to the base station, a Session Management Function (SMF) may select a fixed UPF for the terminal device, and the network device establishes a fixed channel of terminal device-base station-UPF-DN for the terminal device, where a channel between the base station and the UPF may be a general packet radio service tunneling protocol (GTP) channel.

The GTP tunnel may be established between one base station and one UPF, or between multiple base stations and the same UPF. Especially, under the condition that a plurality of base stations establish GTP tunnels with the same UPF, since the terminal device can only transmit data through the fixed UPF, when the service of the UPF is congested, the data of the terminal device under the UPF may be affected, so that the efficiency of data transmission is low.

Disclosure of Invention

The application provides a data transmission method and device, which can improve the efficiency of data transmission.

In a first aspect, a method for data transmission is provided, where the method includes:

the access network equipment receives target data from the terminal equipment;

the access network equipment determines target transmission node equipment according to a selection strategy, wherein the selection strategy is used for selecting transmission node equipment for sending the target data from at least two transmission node equipment, and the at least two transmission node equipment and the access network equipment are provided with data channels;

the access network device sends the target data to the target transport node device.

The access network equipment receives the target data and selects one target transmission node equipment from the at least two transmission node equipment for the target data according to the selection strategy, wherein each transmission node equipment of the at least two transmission node equipment and the access network equipment are provided with a data channel, so that the access network equipment can directly send the target data to a data network through the selected target transmission node equipment, and compared with the traditional scheme that the target data can only adopt fixed transmission node equipment for data transmission to cause data congestion, the embodiment of the application can flexibly select the transmission node equipment, and therefore the communication efficiency is improved.

In some possible implementations, the determining, by the access network device, the target transport node device according to the selection policy includes:

and the access network equipment determines the target transmission node equipment according to the selection strategy and the target data.

The access network device may determine a requirement of the target data, such as a delay requirement, a power consumption requirement, and the like, so that the access network device selects a suitable target transmission node device for the target data according to the requirement of the target data and the selection policy, thereby further improving data transmission efficiency.

In some possible implementations, the method further includes:

the access network equipment receives the selection strategy sent by the core network equipment.

The selection policy may be actively sent to the access network device by the core network device, or may be sent to the access network device by the core network device under the condition of a request of the access network device.

In some possible implementations, the method further includes:

the access network equipment sends a request message to core network equipment, wherein the request message carries the capability information of the access network equipment, and the capability information is used for indicating the maximum number of connectable transmission node equipment supported by the access network equipment;

the method for receiving the selection strategy sent by the core network equipment by the access network equipment comprises the following steps:

the access network device receives a response message of the request message from the core network device, wherein the response message carries the selection policy.

The core network device receives a request message sent by an access network device, where the request message carries indication information of the access network device, and the indication information is used to indicate a maximum number of transmission node devices that can be connected and are supported by the access network device, or the indication information is used to indicate capability information that the access network device supports connecting at least two transmission node devices. And the core network equipment sends a response message of the request message to the access network equipment, wherein the response message carries the selection strategy.

In some possible implementations, the selection policy may include a load status of the at least two transport node devices.

The transport node device may indicate a current load status of each of the at least two transport node devices, or a current capability condition of being able to handle the load.

In some possible implementations, the method further includes:

the access network device receives indication information indicating the presence of a set of transmission node devices in the communication system, the set of transmission node devices comprising the at least two transmission node devices.

The AMF may send first indication information to the access network device, the first indication information indicating that a set of transport node devices exists, the set of transport node devices including the at least two transport node devices. The AMF may receive a request message carrying second indication information of the access network device, the AMF sends the second indication information to the SMF, the SMF determines the selection policy according to the second indication information of the access network device, and sends a response message carrying the selection policy to the access network device through the AMF.

In some possible implementations, the method further includes:

the access network device establishes a data channel with the at least two transport node devices.

The access network device may perform data transmission multiple times after establishing the data channels with the at least two transmission node devices once, or may need to establish the data channels with the at least two transmission node devices in advance every time of performing data transmission.

In some possible implementations, the data channel includes at least one of a general packet radio service tunneling protocol channel, an internet protocol channel, or an ethernet channel.

In a second aspect, a method for data transmission is provided, the method comprising: receiving, by a first transport node device from an access network device, target data, the first transport node device having a data channel with the at least one second transport node device;

the first transmission node device determines a target transmission node device according to a selection policy, wherein the selection policy is used for selecting a transmission node device used for sending the target data from at least one second transmission node device;

the first transport node apparatus sends the target data to the target transport node apparatus.

The first transmission node device receives target data from the access network device, and selects a suitable target transmission node device for the target data from the at least two transmission node devices according to a selection policy, wherein the first transmission node device and other transmission node devices except the first transmission node device in the at least two transmission node devices have data channels, so that the first transmission node device can send the target data to the DN through the target transmission node device, and congestion caused by sending the target data to the DN through the fixed transmission node device by the data is avoided, that is, the communication efficiency is improved in the embodiment of the application.

In some possible implementations, the determining, by the first transmission node device, the target transmission node device according to the selection policy includes:

the first transport node determines the target transport node device based on the selection policy and the target data.

In some possible implementations, the method further includes:

the first transport node device receives the selection policy from the core network device.

The core network device may actively send the selection policy to the access network device, or the core network device may send the selection policy to the access network device in the case of a request from the access network device.

In some possible implementations, the method further includes:

the first transmission node device establishes a data channel with each of the at least two transmission node devices other than the first transmission node device.

The first transmission node device may establish a data channel with each of the at least two transmission node devices other than the first transmission node device in advance, thereby saving data transmission delay.

In a third aspect, an apparatus for system message processing is provided, where the apparatus may be a terminal or a chip in the terminal. The apparatus has the functionality to implement the first aspect and any possible implementation thereof. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the apparatus includes: a processing module and a transceiver module, which may be at least one of a transceiver, a receiver, a transmitter, for example, and which may include a radio frequency circuit or an antenna. The processing module may be a processor.

Optionally, the apparatus further comprises a storage module, which may be a memory, for example. When included, the memory module is used to store instructions. The processing module is connected with the storage module, and the processing module can execute the instructions stored in the storage module or other instructions from other sources, so as to cause the apparatus to perform the method of the first aspect and any possible implementation manner thereof.

In another possible design, when the device is a chip, the chip includes: the chip may further include a transceiver module, which may be, for example, an input/output interface, a pin, a circuit, or the like on the chip. The processing module may be, for example, a processor. The processing module may execute instructions to cause a chip within the terminal to perform the method of the first aspect and any possible implementation manner thereof.

Alternatively, the processing module may execute instructions in a memory module, which may be an on-chip memory module, such as a register, a cache, and the like. The memory module may also be located within the communication device, but outside the chip, such as a read-only memory (ROM) or other types of static memory devices that may store static information and instructions, a Random Access Memory (RAM), and so on.

The processor referred to in any above may be a general purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs for the methods of the above aspects.

In a fourth aspect, an apparatus for system message processing is provided, where the apparatus may be a network device or a chip within the network device. The apparatus has the functionality to implement the second aspect and various possible implementations described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the apparatus includes: a transceiver module, which may be at least one of a transceiver, a receiver, a transmitter, for example, and a processing module, which may include a radio frequency circuit or an antenna. The processing module may be a processor.

Optionally, the apparatus further comprises a storage module, which may be a memory, for example. When included, the memory module is used to store instructions. The processing module is connected with the storage module, and the processing module can execute the instructions stored in the storage module or the instructions from other sources, so as to enable the apparatus to execute the method of the second aspect and various possible implementation manners. In this design, the apparatus may be a network device.

In another possible design, when the device is a chip, the chip includes: a transceiver module and a processing module, the transceiver module can be an input/output interface, a pin or a circuit on the chip, for example. The processing module may be, for example, a processor. The processing module can execute instructions to make the chip in the terminal execute the method of the second aspect and various possible implementation manners.

Alternatively, the processing module may execute instructions in a memory module, which may be an on-chip memory module, such as a register, a cache, and the like. The memory module may also be located within the communication device but external to the chip, such as a read-only memory or other type of static storage device that may store static information and instructions, a random access memory, and so forth.

The processor referred to above may be a general purpose central processing unit, a microprocessor, an application specific integrated circuit, or one or more integrated circuits for controlling the execution of programs for methods in accordance with the above aspects.

In a fifth aspect, a computer storage medium is provided, in which program code is stored, the program code being used for instructing to execute instructions of the method in the first aspect or any possible implementation manner thereof.

A sixth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any possible implementation thereof.

In a seventh aspect, a computer storage medium is provided, in which program code is stored, the program code being used for instructing to execute the instructions of the method in the second aspect or any possible implementation manner thereof.

In an eighth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the second aspect described above or any possible implementation thereof.

In a ninth aspect, there is provided a processor, coupled to a memory, for performing the method of the first aspect or any possible implementation thereof.

In a tenth aspect, there is provided a processor, coupled with a memory, for performing the method of the second aspect or any possible implementation thereof.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface being used for communicating with an external device or an internal device, the processor being used for implementing the method of the first aspect or any possible implementation thereof.

Optionally, the chip may further include a memory having instructions stored therein, and the processor may be configured to execute the instructions stored in the memory or derived from other instructions. When executed, the instructions are for implementing a method of the first aspect described above or any possible implementation thereof.

Alternatively, the chip may be integrated on the access network device.

In a twelfth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being configured to communicate with an external device or an internal device, the processor being configured to implement the method of the second aspect or any possible implementation thereof.

Optionally, the chip may further include a memory having instructions stored therein, and the processor may be configured to execute the instructions stored in the memory or derived from other instructions. When executed, the instructions are for implementing a method of the second aspect described above or any possible implementation thereof.

Alternatively, the chip may be integrated on the core network device.

Based on the technical scheme, the access network equipment receives target data and selects one target transmission node equipment from the at least two transmission node equipments according to the selection strategy, wherein each transmission node equipment of the at least two transmission node equipments and the access network equipment are provided with a data channel, so that the access network equipment can directly send the target data to a data network through the selected target transmission node equipment.

Drawings

FIG. 1 is a schematic diagram of a communication system of the present application;

fig. 2 is a schematic diagram of data transmission in a conventional scheme;

FIG. 3 is a schematic flow chart diagram of a method of data transmission according to one embodiment of the present application;

FIG. 4 is a diagram illustrating a method of data transmission according to an embodiment of the present application;

FIG. 5 is a schematic flow chart diagram of a method of data transmission of another embodiment of the present application;

FIG. 6 is a schematic diagram of a method of data transmission according to another embodiment of the present application;

FIG. 7 is a schematic block diagram of an apparatus for data transfer processing of an embodiment of the present application;

fig. 8 is a schematic block diagram of an apparatus for data transmission processing provided in an embodiment of the present application;

FIG. 9 is a schematic block diagram of an apparatus for data transfer processing of an embodiment of the present application;

FIG. 10 is a schematic block diagram of an apparatus for data transfer processing of an embodiment of the present application;

FIG. 11 is a schematic block diagram illustrating an apparatus for data transfer processing in accordance with one illustrative embodiment;

fig. 12 shows a schematic block diagram of an apparatus for data transfer processing according to another embodiment.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as global system for mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), long term evolution (long term evolution, L TE) systems, L TE Frequency Division Duplex (FDD) systems, L TE Time Division Duplex (TDD), universal mobile communication systems (universal mobile communication system, UMTS), Worldwide Interoperability for Microwave Access (WiMAX), WiMAX, future generation (NR 5, new generation) systems, and so on.

By way of example and not limitation, in an embodiment of the present application, a terminal device in the embodiment of the present application may refer to a User Equipment (UE), an access terminal device, a subscriber unit, a subscriber station, a mobile station, a remote terminal device, a mobile device, a user terminal device, a wireless communication device, a user agent, or a user equipment.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an internet of things (IoT) system, where IoT is an important component of future information technology development, and a main technical feature of the present application is to connect an article with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects.

In the embodiment of the present application, the IOT technology may achieve massive connection, deep coverage, and power saving for the terminal device through a Narrowband (NB) technology, for example. For example, the NB includes only one Resource Block (RB), i.e., the bandwidth of the NB is only 180 KB. The method of the embodiment of the application can effectively solve the congestion problem of the mass terminal equipment in the IOT technology when accessing the network through the NB.

In addition, in this application, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the access network device, and sending electromagnetic waves to transmit uplink data to the access network device.

The access network device in this embodiment may be a device for communicating with a terminal device, the access network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB ) in a Wideband Code Division Multiple Access (WCDMA) system, may also be AN evolved node b (eNB, or eNodeB) in AN L TE system, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the access network device may be a relay station, AN access point (access point, AP), a wireless signal source device, a vehicle-mounted device, a wearable device, and AN access network device in a future 5G network or AN access network L in a future P L network, and the access network device may be AN MN L in a new wireless access network system, and may not be implemented in this application.

In addition, in this embodiment of the present application, an access network device provides a service for a cell, and a terminal device communicates with the access network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), and the small cell here may include: urban cell (metro cell), micro cell (microcell), pico cell (pico cell), femto cell (femto cell), etc., and these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service.

For example, in a Carrier Aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and a Cell identification (Cell identification, Cell ID) of a secondary Cell operating on the secondary carrier are carried at the same time, in this case, the concepts of the carrier and the Cell may be considered to be identical, for example, when the UE accesses one carrier and one Cell are identical.

The core network device may be connected with a plurality of access network devices for controlling the access network devices, and may distribute data received from a network side (e.g., the internet) to the access network devices.

In addition, in the present application, the access network device may include a base station (gNB), such as a macro station, a micro base station, an indoor hotspot, a relay node, and the like, and functions to transmit radio waves to the terminal device, on one hand, implement downlink data transmission, and on the other hand, transmit scheduling information to control uplink transmission, and receive radio waves transmitted by the terminal device, and receive uplink data transmission.

The functions and specific implementations of the terminal device, the access network device and the core network device listed above are merely exemplary illustrations, and the present application is not limited thereto.

In the embodiments of the present application, a terminal device or an access network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer, where the hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory).

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.).

In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

It should be noted that, in the embodiment of the present application, a plurality of applications may run in the application layer, and in this case, the application executing the method of the embodiment of the present application and the application controlling the receiving end device to complete the action corresponding to the received data may be different applications.

It should be understood that the standard names in the embodiments of the present application are functional descriptions, do not limit names, and only indicate functions of devices.

Fig. 1 is a schematic diagram of a communication system according to the present application, taking a 5G communication system as an example. The communication system in fig. 1 may include an access mobility management function (AMF), an SMF, a DN, a UPF, a Radio Access Network (RAN), and a UE. The SMF is responsible for session management and the AMF is responsible for access and mobility management. Such as AMF, SMF, DN, UPF are all functional descriptions of core network devices, and the base station is a functional description of access network devices.

Under a traditional data transmission architecture, data of terminal equipment is communicated with DN through a base station and a fixed UPF. Specifically, after the terminal device accesses the base station, the SMF selects a fixed UPF for the terminal device, and establishes a fixed channel of terminal device-base station-UPF-DN, where the channel between the base station and the UPF may be a GTP channel. Specifically, the fixed UPF corresponds to a certain PDU session of the terminal device, and correspondingly, the fixed channel corresponds to a fixed channel of a certain PDU session of the terminal device.

The GTP tunnel may be established between one base station and one UPF, or between multiple base stations and the same UPF. Especially, in the case that multiple base stations establish GTP tunnels with the same UPF, since the UE can only transmit data through the fixed UPF (for example, as shown in fig. 2, UE-1 can only transmit corresponding PDU session data to the DN through UPF 1), when the service of the UPF is congested, the data of the terminal device under the UPF is affected, so that the efficiency of data transmission is low.

Fig. 3 shows a schematic flow chart of a method of data transmission of an embodiment of the present application.

Optionally 301, the access network device receives the target data from the terminal device. Accordingly, the terminal device sends the target data to the access network device.

Specifically, the target data received by the access network device from the terminal device may be data for the terminal device, where the target data may be service data corresponding to a Protocol Data Unit (PDU) session.

As an implementation manner, the target data in this embodiment may refer to service data corresponding to one PDU session.

302, the access network device determines a target transmission node device according to a selection policy, where the selection policy is used to select a transmission node device for sending the target data from at least two transmission node devices, and the at least two transmission node devices have a data channel with the access network device.

As an implementation manner, at least two transmission node devices in this embodiment may be configured to send service data corresponding to the same PDU session. The at least two transmission node devices and the access network device have data channels corresponding to the same PDU session.

Specifically, the access network device has data channels with at least two transmission node devices, and the access network device can select a target transmission node device according to a selection policy each time data transmission is performed.

It should be noted that the target transmission node devices selected by the access network device for different terminal devices may be different, and the target transmission node devices selected for different data of the same terminal device may also be different, which is not limited in this application.

It should be understood that the data path between the at least two transport node devices and the access network device may be for the same terminal device, for the same PDU session traffic of the same terminal device, or for the same type of data (e.g. the same traffic) of at least one terminal device within the access network device. In other words, the data channel between the at least two transmission node devices and the access network device may transmit different types of data of the same terminal device, may also transmit the same type of data of the same terminal device, and may also transmit the same type of data belonging to different terminal devices, that is, the data channel may be dedicated to the terminal device, may also be dedicated to the same PDU session service of the terminal device, and may also be shared by terminal devices having the same type of data.

It should also be understood that the terminal device may select a target transmission node device and an access network device from the at least two transmission node devices to send uplink data to the access network device. The access network device may also send data to the terminal device using the target transport node device. Or may also send downlink data through other transmission node devices of the at least two transmission node devices, which is not limited in this application.

Optionally, the selection policy may indicate a load status of the transmitting node device.

In particular, the transmitting node device may indicate a current load status of each of the at least two transmitting node devices, or a current capability condition of being able to handle the load.

Optionally, step 302 may specifically be that the access network device determines a target transmission node device according to the selection policy and the target data.

Specifically, the access network device may determine a requirement of the target data, such as a delay requirement, a power consumption requirement, and the like, so that the access network device selects a suitable target transmission node device for the target data according to the requirement of the target data and the selection policy, thereby further improving data transmission efficiency.

Alternatively, the transmission node device may be a UPF, that is, a data channel may be established between the UPF and the access network device.

Alternatively, the data channel may be at least one of a GTP channel, an Internet Protocol (IP) channel, or an ethernet channel.

Optionally, before step 302, the access network device may obtain the selection policy from the core network device. Accordingly, the core network device sends the selection policy.

Specifically, the core network device may actively send the selection policy to the access network device, or the core network device may send the selection policy to the access network device in a case of a request from the access network device.

Optionally, the core network device receives a request message sent by the access network device, where the request message carries indication information of the access network device, and the indication information is used to indicate a maximum number of transmission node devices that can be connected and are supported by the access network device, or the indication information is used to indicate capability information that the access network device supports connecting at least two transmission node devices. And the core network equipment sends a response message of the request message to the access network equipment, wherein the response message carries the selection strategy. Optionally, before the access network device sends the request message to the core network device, first indication information sent by the core network device may be received, where the first indication information indicates that a transport node device set exists, and the transport node device set includes the at least two transport node devices.

As a specific implementation manner, the AMF may send first indication information to the access network device, where the first indication information is used to indicate that a transmission node device set exists, and the transmission node device set includes the at least two transmission node devices. The AMF may receive a request message carrying second indication information of the access network device, the AMF sends the second indication information to the SMF, the SMF determines the selection policy according to the second indication information of the access network device, and sends a response message carrying the selection policy to the access network device through the AMF. Optionally, the SMF determines at least two transmission node devices for the access network device according to the second indication information of the access network device, and sends a response message to the access network device through the AMF, where the response message carries address information of the at least two transmission node devices, so that the access network device and the at least two transmission node devices establish a data channel. As an implementation manner, the request information may indicate, through the second indication information of at least one bit, capability information that the access network device supports connecting at least two transport node devices.

After the access network device receives the target data sent by the terminal device, the access network device executes step 302, so that the AMF can flexibly instruct the access network device to perform data transmission according to the embodiment of the present application, instead of sending data to the DN by using a fixed transmission node device according to a conventional scheme, thereby improving the flexibility of data transmission.

It should be understood that in the case where the transmitting node device is a UPF, the set of transmitting node devices may be referred to as a "UPF pool (pool)".

Optionally, before step 302, the access network device may also establish a data channel with the at least two transport node devices. For example, as shown in fig. 4, the gNB1 establishes a data channel with the UPF1, and the gNB1 establishes a data channel with the UPF 2.

Specifically, the access network device may perform data transmission multiple times after establishing the data channels with the at least two transmission node devices once, or may need to establish the data channels with the at least two transmission node devices in advance every time of performing data transmission.

It should be noted that, in a case that the access network device needs to establish a data channel with at least two transmission node devices in advance each time data transmission is performed, the number of the transmission node devices that establish a data channel with the access network device in advance may be the same or different, and the application does not limit this.

It should be understood that the access network device may establish the data channel according to the indication of the SMF.

303, the access network device sends the target data to the target transport node device.

Specifically, the access network device receives target data, and selects one target transmission node device from at least two transmission node devices for the target data according to a selection policy, where each of the at least two transmission node devices has a data channel with the access network device. As one implementation of sending, each of the at least two transmission node devices and the access network device have a data channel corresponding to the same PDU session service of the terminal device. Therefore, the access network equipment can directly send the target data to the DN through the selected target transmission node equipment, and compared with the traditional scheme that the target data can only adopt the fixed transmission node equipment for data transmission to cause data congestion, the access network equipment can flexibly select the transmission node equipment, so that the communication efficiency is improved.

Fig. 5 shows a schematic flow chart of a method of data transmission of another embodiment of the present application.

It should be noted that, unless otherwise specified, the same terms in the embodiments of the present application and the embodiments shown in fig. 3 and fig. 4 have the same meanings, and are not repeated here to avoid redundancy.

The embodiment of the application is applied to a communication system comprising at least two transmission node devices, an access network device, a terminal device and a DN.

Optionally 501, a first transport node device of the at least two transport node devices receives the target data from the access network device, the first transport node device having a data channel with each transport node device of the at least two transport node devices except the first transport node device.

Specifically, a data channel is provided between the access network device and the first transmission node device, the at least two transmission node devices may form a transmission node device pool, and the first transmission node device may have a data channel with other transmission node devices in the transmission node device pool.

It should be noted that each of the at least two transmission node devices is capable of communicating with the DN.

It should be appreciated that the core network device may instruct the access network device to preferentially establish the data channel with the first transport node device.

Alternatively, in the case that the transmission node device is a UPF, the first transmission node device may be a node (CDF) having a concentration & distribution function.

Optionally, before step 501, the first transmission node device may establish a data channel with each of the at least two transmission node devices except the first transmission node device in advance.

For example, as shown in fig. 6, the first transport node device is a CDF, which establishes a data channel with the UPF1, and the CDF establishes a data channel with the UPF 2.

The first transport node device determines a target transport node device according to a selection policy for selecting a transport node device for sending the target data from the at least two transport node devices 502.

Specifically, the first transmission node device selects one target transmission node device from the at least two transmission node devices for the target data according to the selection policy. As an implementation manner, the target data may be transmission data corresponding to the same PDU session service of the same terminal device.

It should be noted that the target transmission node device selected by the first transmission node device may also be the first transmission node itself.

Optionally, step 502 may specifically be to determine the target transmission node device according to the selection policy and the target data.

Specifically, the first transmission node device may determine a requirement of the target data, such as a delay requirement, a power consumption requirement, and the like, so that the first transmission node device selects a suitable target transmission node device for the target data according to the requirement of the target data and the selection policy, thereby further improving the data transmission efficiency.

Optionally, before step 502, the first transport node device may obtain the selection policy from the core network device. Accordingly, the core network device sends the selection policy.

Specifically, the core network device may actively send the selection policy to the first transmission node device, or the core network device may send the selection policy to the first transmission node device under the condition of a request of the access network device.

Optionally, the core network device receives a first message sent by the access network device, where the first message carries indication information of the access network device, and the indication information is used to indicate that the access network device supports the maximum number of the transport node device pool, or the indication information is used to indicate that the access network device supports capability information of the transport node device pool. And the core network equipment sends a second message to the first transmission node equipment, wherein the second message carries the selection strategy. Optionally, before the access network device sends the first message to the core network device, first indication information sent by the core network device may be received, where the first indication information indicates that a transport node device pool exists, and a first transport node device in the transport node device pool and other transport node devices in the transport node device pool have a data channel.

It should be understood that the first message may be a request message and the second message may be a response message to the request message.

As a specific implementation manner, the AMF may send first indication information to the access network device, where the first indication information is used to indicate that a transport node device pool exists and indicate CD UPFs (i.e., first transport node devices) in the transport node device pool. The AMF may receive a first message carrying second indication information of the access network device, the AMF sends the second indication information to the SMF, and the SMF determines the selection policy according to the second indication information of the access network device and sends the selection policy to the first transmission node device. Optionally, the SMF determines, for the access network device according to the second indication information of the access network device, a first transport node device in the transport node device pool, and sends address information of the at least two transport node devices to the first transport node device, so that the first transport node device and the at least two transport node devices establish a data channel. As an implementation manner, the request information may indicate, by the second indication information of at least one bit, capability information of the access network device to support the transport node device pool. Alternatively, the SMF may send the selection policy and/or address information of the at least two transport node devices directly to the first transport node device; or the SMF sends the selection policy to the first transmission node device through the AMF, for example, the SMF may send the selection policy and/or address information of the at least two transmission node devices to the AMF, and the AMF sends the selection policy and/or address information of the at least two transmission node devices to the first transmission node device.

503, the first transport node device sends target data to the target transport node device.

Specifically, the first transmission node device receives target data from the access network device, and selects a suitable target transmission node device for the target data from at least two transmission node devices according to a selection policy, where the first transmission node device and other transmission node devices of the at least two transmission node devices except the first transmission node device have data channels, so that the first transmission node device can send the target data to the DN through the target transmission node device, thereby avoiding congestion caused by sending the target data to the DN through a fixed transmission node device, that is, the embodiment of the present application improves communication efficiency.

It should be noted that, if the target transmission node device selected by the first transmission node device is the first transmission node device, the first transmission node device may directly send the target data to the DN.

The method of data transmission according to the embodiment of the present application is described above in detail, and the apparatus of data transmission according to the embodiment of the present application will be described below.

Fig. 7 shows a schematic block diagram of an apparatus 700 for data transmission according to an embodiment of the present application.

It is to be understood that the apparatus 700 may correspond to the terminal device in the embodiment shown in fig. 3, and may have any function of the terminal device in the method. The apparatus 700 includes a transceiver module 710 and a processing module 720.

A transceiver module 710 for receiving target data from a terminal device;

a processing module 720, configured to determine a target transmission node device according to a selection policy, where the selection policy is used to select a transmission node device for sending the target data from at least two transmission node devices, and the at least two transmission node devices have a data channel with the access network device;

the transceiver module 710 is further configured to transmit the target data to the target transmission node device.

Optionally, the processing module 720 is specifically configured to:

and determining the target transmission node equipment according to the selection strategy and the target data.

Optionally, the transceiver module 710 is further configured to receive the selection policy sent by the core network device.

Optionally, the transceiver module 710 is further configured to send a first message to a core network device, where the first message carries capability information of the access network device, and the capability information is used to indicate a maximum number of connectable transmission node devices supported by the access network device;

the transceiver module 710 is specifically configured to:

the selection policy is received from the core network device.

Optionally, the transceiver module 710 is further configured to send a request message to a core network device, where the request message carries capability information of the access network device, and the capability information is used to indicate a maximum number of connectable transmission node devices supported by the access network device;

the transceiver module 710 is specifically configured to:

and receiving a response message of the request message from the core network equipment, wherein the response message carries the selection strategy.

Optionally, the selection policy may comprise a load status of the at least two transmitting node devices.

Optionally, the transceiver module 710 is further configured to receive indication information, where the indication information is used to indicate that a transmission node device set exists in the communication system, and the transmission node device set includes the at least two transmission node devices.

Optionally, the processing module 720 is further configured to establish a data channel with the at least two transmission node devices.

Optionally, the data channel comprises at least one of a general packet radio service tunneling protocol channel, an internet protocol channel, or an ethernet channel.

Fig. 8 shows a schematic block diagram of an apparatus 800 for data transmission according to an embodiment of the present application, where the apparatus 800 may be the terminal device described in fig. 1 and the terminal device described in fig. 3. The apparatus may employ a hardware architecture as shown in fig. 8. The apparatus may include a processor 810 and a transceiver 820, and optionally, the apparatus may further include a memory 830, the processor 810, the transceiver 820, and the memory 830 being in communication with each other via an internal connection path. The related functions implemented by the processing module 620 in fig. 7 may be implemented by the processor 810, and the related functions implemented by the transceiver module 710 may be implemented by the processor 810 controlling the transceiver 820.

Alternatively, the processor 810 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), a special purpose processor, or one or more ics for executing embodiments of the present application. Alternatively, a processor may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions). For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a device (e.g., a base station, a terminal device, or a chip, etc.), execute a software program, and process data of the software program.

Optionally, the processor 810 may include one or more processors, for example, one or more Central Processing Units (CPUs), and in the case of one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The transceiver 820 is used for transmitting and receiving data and/or signals, and receiving data and/or signals. The transceiver may include a transmitter for transmitting data and/or signals and a receiver for receiving data and/or signals.

The memory 830 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable memory (EPROM), and a compact disc read-only memory (CD-ROM), and the memory 830 is used for storing related instructions and data.

The memory 830 is used for storing program codes and data of the terminal device, and may be a separate device or integrated in the processor 810.

Specifically, the processor 810 is configured to control the transceiver to perform information transmission with a network device. Specifically, reference may be made to the description of the method embodiment, which is not repeated herein.

It will be appreciated that fig. 8 only shows a simplified design of the means for data transmission. In practical applications, the apparatus may also include other necessary elements respectively, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all terminal devices that can implement the present application are within the protection scope of the present application.

In one possible design, the apparatus 800 may be a chip, such as a communication chip that may be used in a terminal device, and is used to implement the relevant functions of the processor 810 in the terminal device. The chip can be a field programmable gate array, a special integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit and a microcontroller which realize related functions, and can also adopt a programmable controller or other integrated chips. The chip may optionally include one or more memories for storing program code that, when executed, causes the processor to implement corresponding functions.

In particular implementations, apparatus 800 may also include, as an example, an output device and an input device, the output device communicating with processor 810 and may display information in a variety of ways.

Fig. 9 shows a schematic block diagram of an apparatus 900 for data transmission according to an embodiment of the present application.

It is understood that the apparatus 900 may correspond to the network device in the embodiment shown in fig. 4, and may have any function of the network device in the method. The apparatus 900 includes a transceiver module 910 and a processing module 920.

A transceiver module 910, configured to receive target data from an access network device, where the first transmission node device and the at least one second transmission node device have a data channel;

a processing module 920, configured to determine a target transmission node device according to a selection policy, where the selection policy is used to select a transmission node device used to send the target data from at least one second transmission node device;

the transceiver module 910 is further configured to transmit the target data to the target transmission node device.

Optionally, the processing module is specifically configured to:

Optionally, the transceiver module is further configured to receive the selection policy from the core network device.

Optionally, the processing module is further configured to establish a data channel with each of the at least two transmission node devices except the first transmission node device.

Fig. 10 shows an apparatus 1000 for data transmission according to an embodiment of the present application, where the apparatus 1000 may be the access network device shown in fig. 3. The apparatus may employ a hardware architecture as shown in fig. 10. The apparatus may include a processor 1010 and a transceiver 1020, and optionally, the apparatus may further include a memory 1030, the processor 1010, the transceiver 1020, and the memory 1030 communicating with each other through an internal connection path. The related functions implemented by the processing module 1020 in fig. 10 may be implemented by the processor 1010, and the related functions implemented by the transceiver module 1010 may be implemented by the processor 1010 controlling the transceiver 1020.

Alternatively, the processor 1010 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), a special-purpose processor, or one or more ics for executing embodiments of the present application. Alternatively, a processor may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions). For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control the apparatus (e.g., base station, terminal device, or chip, etc.), execute software programs, and process data of the software programs.

Optionally, the processor 1010 may include one or more processors, for example, one or more Central Processing Units (CPUs), and in the case of one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The transceiver 1020 is used for transmitting and receiving data and/or signals, as well as receiving data and/or signals. The transceiver may include a transmitter for transmitting data and/or signals and a receiver for receiving data and/or signals.

The memory 1030 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable memory (EPROM), and a compact disc read-only memory (CD-ROM), and the memory 1030 is used for storing relevant instructions and data.

The memory 1030 is used for storing program codes and data of the terminal device, and may be a separate device or integrated in the processor 1010.

Specifically, the processor 1010 is configured to control the transceiver to perform information transmission with a network device. Specifically, reference may be made to the description of the method embodiment, which is not repeated herein.

In particular implementations, apparatus 1000 may also include, as an example, an output device and an input device, the output device communicating with processor 1010 and being capable of displaying information in a variety of ways.

It will be appreciated that fig. 10 only shows a simplified design of the apparatus for data transmission. In practical applications, the apparatus may also include other necessary elements respectively, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all terminal devices that can implement the present application are within the protection scope of the present application.

In one possible design, the apparatus 1000 may be a chip, such as a communication chip that may be used in a terminal device, and is used for implementing the relevant functions of the processor 1010 in the terminal device. The chip can be a field programmable gate array, a special integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit and a microcontroller which realize related functions, and can also adopt a programmable controller or other integrated chips. The chip may optionally include one or more memories for storing program code that, when executed, causes the processor to implement corresponding functions.

The embodiment of the application also provides a device which can be terminal equipment or a circuit. The apparatus may be configured to perform the actions performed by the terminal device in the above method embodiments.

Fig. 11 shows another form of the present embodiment. The processing device 1300 includes modules such as a modulation subsystem, a central processing subsystem, and peripheral subsystems. The communication device in this embodiment may act as a modulation subsystem therein. In particular, the modulation subsystem may include a processor 1303 and an interface 1304. The processor 1303 completes the functions of the processing module 610, and the interface 1304 completes the functions of the transceiver module 620. As another variation, the modulation subsystem includes a memory 1306, a processor 1303, and a program stored in the memory and executable on the processor, and the processor implements the method according to one of the first to fifth embodiments when executing the program. It should be noted that the memory 1306 may be non-volatile or volatile, and may be located inside the modulation subsystem or in the processing device 1300 as long as the memory 1306 can be connected to the processor 1303.

When the apparatus in this embodiment is a network device, the network device may be as shown in fig. 12, where the apparatus 1400 includes one or more radio frequency units, such as a Remote Radio Unit (RRU) 1410 and one or more baseband units (BBUs) (which may also be referred to as digital units, DUs) 1420. The RRU 1410 may be referred to as a transceiver module, which corresponds to the transceiver module 910 in fig. 9, and optionally, the transceiver module may also be referred to as a transceiver, a transceiver circuit, or a transceiver, which may include at least one antenna 1412 and a radio frequency unit 1413. The RRU 1410 section is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending indication information to a terminal device. The BBU 1410 part is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 1410 and the BBU1420 may be physically disposed together or may be physically disposed separately, that is, distributed base stations.

The BBU1420 is a control center of a base station, and may also be referred to as a processing module, and may correspond to the processing module 920 in fig. 9, and is mainly used for completing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing module) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In one example, the BBU1420 may be formed by one or more boards, where a plurality of boards may support a radio access network of a single access system (e.g., L TE network) together, or may support radio access networks of different access systems (e.g., L TE network, 5G network, or other networks) respectively, the BBU1420 further includes a memory 1421 and a processor 1422, where the memory 1421 is used to store necessary instructions and data, and the processor 1422 is used to control a base station to perform necessary actions, for example, to control the base station to execute the operation flow related to the network device in the above method embodiments.

As another form of the present embodiment, there is provided a computer-readable storage medium having stored thereon instructions that, when executed, perform the method of the above-described method embodiments.

As another form of the present embodiment, there is provided a computer program product containing instructions that, when executed, perform the method of the above-described method embodiments.

The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, e.g., from one website, computer, server, or data center via a wired (e.g., coaxial cable, fiber optic, digital subscriber line (DS L)) or wireless (e.g., infrared, wireless, microwave, etc.) manner to another website, computer, server, or data center, the computer readable storage medium may be any available medium such as a solid state disk (DVD), a Solid State Disk (SSD), a floppy disk (cd), a cd-rom, a DVD-rom, a DVD-cd-rom, a DVD-optical disk, a cd-rom, a DVD, a cd-rom, a DVD, a.

It should be understood that the processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It is understood that the memory in the embodiments of the present application may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory, wherein non-volatile memory may be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory volatile memory may be Random Access Memory (RAM), which serves as an external cache memory, by way of example but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (e.g., multiple bank, data, enhanced Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), or direct access DRAM (DDR ) L).

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

It should also be understood that the reference herein to first, second, and various numerical designations is merely a convenient division to describe and is not intended to limit the scope of the embodiments of the present application.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. Wherein A or B is present alone, and the number of A or B is not limited. Taking the case of a being present alone, it is understood to have one or more a.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or an access network device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, comprising:

the access network equipment receives target data from the terminal equipment;

the access network equipment determines target transmission node equipment according to a selection strategy, wherein the selection strategy is used for selecting transmission node equipment used for sending the target data from at least two transmission node equipment, and the at least two transmission node equipment and the access network equipment are provided with data channels;

and the access network equipment sends the target data to the target transmission node equipment.

2. The method of claim 1, wherein the access network device determining a target transport node device according to a selection policy comprises:

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and the access network equipment receives the selection strategy sent by the core network equipment.

4. The method of claim 3, further comprising:

and the access network equipment receives a response message of the request message from the core network equipment, wherein the response message carries the selection strategy.

5. The method according to any of claims 1 to 4, wherein the selection policy comprises load status of the at least two transmitting node devices.

6. The method according to any one of claims 1 to 5, further comprising:

the access network device receives indication information, where the indication information is used to indicate that a transmission node device set exists in a communication system, and the transmission node device set includes the at least two transmission node devices.

7. The method according to any one of claims 1 to 6, further comprising:

and the access network equipment establishes a data channel with the at least two transmission node equipment.

8. The method of claim 7, wherein the data channel comprises at least one of a general packet radio service tunneling protocol channel, an internet protocol channel, or an ethernet channel.

9. A method of data transmission, the method comprising:

receiving, by a first transport node device from an access network device, target data, the first transport node device having a data channel with the at least one second transport node device;

the first transmission node device determines a target transmission node device according to a selection strategy, wherein the selection strategy is used for selecting the transmission node device used for sending the target data from at least one second transmission node device;

and the first transmission node equipment sends the target data to the target transmission node equipment.

10. The method of claim 9, wherein determining, by the first transport node device, a target transport node device according to a selection policy comprises:

and the first transmission node determines the target transmission node equipment according to the selection strategy and the target data.

11. The method according to claim 9 or 10, characterized in that the method further comprises:

the first transport node device receives the selection policy from a core network device.

12. The method according to any one of claims 9 to 11, further comprising:

the first transmission node device establishes a data channel with each of the at least two transmission node devices except the first transmission node device.

13. Method according to any of claims 9 to 12, wherein said selection policy comprises load status of said at least two transmitting node devices.

14. An apparatus for data transmission, comprising:

the receiving and sending module is used for receiving the target data from the terminal equipment;

a processing module, configured to determine a target transmission node device according to a selection policy, where the selection policy is used to select a transmission node device for sending the target data from at least two transmission node devices, and the at least two transmission node devices and the access network device have a data channel;

the transceiver module is further configured to send the target data to the target transmission node device.

15. The apparatus of claim 14, wherein the processing module is specifically configured to:

16. The apparatus according to claim 14 or 15, wherein the transceiver module is further configured to receive the selection policy sent by a core network device.

17. The apparatus of claim 16, wherein the transceiver module is further configured to send a request message to a core network device, where the request message carries capability information of the access network device, and the capability information is used to indicate a maximum number of connectable transport node devices supported by the access network device;

wherein the transceiver module is specifically configured to:

18. The arrangement according to any of claims 14-17, wherein said selection policy comprises load status of said at least two transmitting node devices.

19. The apparatus according to any of claims 14 to 18, wherein the transceiver module is further configured to receive indication information indicating that a set of transmission node devices exists in the communication system, the set of transmission node devices including the at least two transmission node devices.

20. The apparatus according to any of claims 14 to 19, wherein the processing module is further configured to establish a data channel with the at least two transmission node devices.

21. The apparatus of claim 20, wherein the data channel comprises at least one of a general packet radio service tunneling protocol channel, an internet protocol channel, or an ethernet channel.

22. An apparatus for data transmission, the method comprising:

a transceiver module, configured to receive target data from an access network device, where the first transmission node device and the at least one second transmission node device have a data channel;

a processing module, configured to determine a target transmission node device according to a selection policy, where the selection policy is used to select a transmission node device for sending the target data from at least one second transmission node device;

23. The apparatus of claim 22, wherein the processing module is specifically configured to:

24. The apparatus according to claim 22 or 23, wherein the transceiver module is further configured to receive the selection policy from a core network device.

25. The apparatus according to any of claims 22 to 24, wherein the processing module is further configured to establish a data channel with each of the at least two transmission node devices except the first transmission node device.

26. The arrangement according to any of the claims 22 to 25, characterised in that said selection policy comprises load status of said at least two transmitting node devices.

27. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 13.

28. A computer program product which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 13.