WO2022143137A1

WO2022143137A1 - Data transmission method and apparatus, base station, user device and storage medium

Info

Publication number: WO2022143137A1
Application number: PCT/CN2021/137674
Authority: WO
Inventors: 朱春晖
Original assignee: 展讯半导体(南京)有限公司
Priority date: 2020-12-28
Filing date: 2021-12-14
Publication date: 2022-07-07
Also published as: CN114697968A

Abstract

Disclosed in the present invention are a data transmission method and apparatus, a base station, a user device and a storage medium. The data transmission method comprises: acquiring indication information for characterizing whether a target base station supports UPIP; and determining, on the basis of the indication information, whether to send a handover command to a user device, wherein the handover command is used to instruct the user device to hand over from connection with a source base station to connection with the target base station. The present invention determines, on the basis of the indication information for characterizing whether a target base station supports UPIP, whether to send a handover command to a user device, i.e. determines whether to hand over the user device from connection with a source base station to connection with a target base station. Compared with a network handover method in the prior art, the present invention selects whether to hand over a network in the case where it is determined whether a target base station supports UPIP, so that the stability of a UPIP PDU session of a user device can be improved, thereby improving the user experience.

Description

Data transmission method and device, base station, user equipment and storage medium

This application claims the priority of Chinese patent application CN202011578833.8 with an application date of December 28, 2020. This application cites the full text of the above Chinese patent application.

technical field

The present invention relates to the field of communications, and in particular, to a data transmission method and device, a base station, user equipment and a storage medium.

Background technique

UPIP (User Plane Integrity Protection, User Plane Integrity Protection) refers to the PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) layer data integrity protection between UE (User Equipment, user terminal) and base station, UE and base station Both can detect whether PDCP layer data has been tampered with in the middle.

Currently, all 5G base stations gNB support UPIP, but traditional 4G base stations (R16 and previous base stations eNB/access network E-UTRAN) do not support UPIP. Starting from 3GPP R17, some 4G base station eNBs will be upgraded to support UPIP. Therefore, there will be 4G base station eNBs that "support UPIP" and "do not support UPIP" in R17 and later networks.

For both the UE and the 5G base station gNB that support UPIP, on the basis that the two have activated the UPIP PDU (Protocol Data Unit) session, due to network coverage and other reasons, the UE needs to switch from connecting with the 5G base station gNB to connecting with the 4G base station eNB. The specific process of switching the network is shown in Figure 1.

However, the 4G base station eNB may not support UPIP. In this case, if the network is still switched, the UPIP PDU session on the UE side will fail, thereby reducing the user experience.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the defect in the prior art that the UPIP PDU session fails due to network switching even when the target base station does not support UPIP, and provides a data transmission method and device, a base station, and a user that improve user experience. equipment and storage media.

The present invention solves the above-mentioned technical problems through the following technical solutions:

A first aspect of the present invention provides a data transmission method, comprising the following steps:

Obtain indication information used to characterize whether the target base station supports UPIP;

Whether to send a handover command to the user equipment is determined based on the indication information, wherein the handover command is used to instruct the user equipment to switch from connecting with the source base station to connecting with the target base station.

Optionally, the acquiring the indication information for characterizing whether the target base station supports UPIP specifically includes:

Send a handover requirement to the mobility management function; wherein, the handover requirement includes the information of the target base station and the request that the target base station needs to indicate whether UPIP is supported;

Receive indication information sent by the target base station and used to characterize whether the target base station supports UPIP.

The system information of the target base station is monitored, and the indication information used to characterize whether the target base station supports UPIP is obtained from the system information.

Optionally, the determining whether to send a handover command to the user equipment based on the indication information specifically includes: if the indication information indicates that the target base station does not support UPIP, sending a handover command to the user equipment, wherein the handover command includes A message used to indicate that the target base station does not support UPIP.

Optionally, the determining whether to send a handover command to the user equipment based on the indication information specifically includes: if the indication information indicates that the target base station supports UPIP, sending a handover command to the user equipment.

Optionally, the determining whether to send a handover command to the user equipment based on the indication information specifically includes:

If the indication information indicates that the target base station does not support UPIP, it is determined whether to send a handover command to the user equipment according to the PDU session established with the user equipment.

Optionally, the determining whether to send a handover command to the user equipment according to the PDU session established with the user equipment specifically includes: if the PDU session established with the user equipment only includes the UPIP PDU session, not sending the handover command to the user equipment. The user equipment sends a handover command.

Optionally, determining whether to send a handover command to the user equipment according to the PDU session established with the user equipment specifically includes: if the PDU session established with the user equipment includes a UPIP PDU session and a non-UPIP PDU session, Then, a handover command is sent to the user equipment, wherein the handover command includes a resource request for a PDU session to be handed over, and the PDU session to be handed over only includes a non-UPIP PDU session.

Optionally, when it is determined to send a handover command to the user equipment, the data transmission method further includes:

A deactivation request for the UPIP PDU session is sent to the mobility management function.

Optionally, the deactivation request carries a deactivation reason, and the deactivation reason is that the target base station does not support UPIP.

A second aspect of the present invention provides a data transmission device, comprising:

an acquisition module, used to acquire indication information used to characterize whether the target base station supports UPIP;

A determining module, configured to determine whether to send a handover command to the user equipment based on the indication information, wherein the handover command is used to instruct the user equipment to switch from being connected with the source base station to being connected with the target base station.

Optionally, the obtaining module includes:

A sending unit, configured to send a handover requirement to the mobility management function; wherein, the handover requirement includes the information of the target base station and the request that the target base station needs to indicate whether to support UPIP;

A receiving unit, configured to receive the indication information sent by the target base station and used to represent whether the target base station supports UPIP.

Optionally, the obtaining module is specifically configured to monitor system information of the target base station, and obtain, from the system information, indication information used to characterize whether the target base station supports UPIP.

Optionally, the determining module is specifically configured to send a handover command to the user equipment when the indication information indicates that the target base station does not support UPIP, wherein the handover command includes instructions for indicating that the target base station does not support UPIP. news.

Optionally, the determining module is specifically configured to send a handover command to the user equipment when the indication information indicates that the target base station supports UPIP.

Optionally, the determining module is specifically configured to determine whether to send a handover command to the user equipment according to the PDU session established with the user equipment when the indication information indicates that the target base station does not support UPIP.

Optionally, the indication information represents that the target base station does not support UPIP, and the determining module is specifically configured to not send a handover command to the user equipment when the PDU session established with the user equipment only includes the UPIP PDU session;

Optionally, the indication information indicates that the target base station does not support UPIP. A switching command is sent, wherein the switching command includes a resource request for a PDU session to be switched, and the PDU session to be switched only includes a non-UPIP PDU session.

Optionally, the data transmission apparatus further includes a sending module, configured to send a deactivation request of the UPIP PDU session to the mobility management function when it is determined to send a handover command to the user equipment.

A third aspect of the present invention provides a data transmission method, comprising the following steps:

Broadcast system information, wherein the system information includes indication information for indicating whether the base station supports UPIP.

A fourth aspect of the present invention provides a data transmission apparatus, comprising a broadcasting module for broadcasting system information, wherein the system information includes indication information for indicating whether a base station supports UPIP.

A fifth aspect of the present invention provides a base station, including:

at least one processor;

a memory communicatively coupled to the at least one processor; and

Transceivers for communicating with other devices;

Wherein, the memory stores instructions executable by the at least one processor, the instructions are executed by the at least one processor to enable the at least one processor to perform the first aspect or the third aspect. data transfer method.

A sixth aspect of the present invention provides a data transmission method, comprising the following steps:

receiving a handover command sent by a source base station, where the handover command includes information of a target base station and a message used to indicate that the target base station does not support UPIP;

According to the handover command, the connection with the source base station is switched to the connection with the target base station.

Optionally, the data transmission method further includes:

If the previously established PDU session with the source base station includes a UPIP PDU session, a deactivation request for the UPIP PDU session is sent to the target base station.

A seventh aspect of the present invention provides a data transmission device, comprising:

a receiving module, configured to receive a handover command sent by a source base station, where the handover command includes information of a target base station and a message for indicating that the target base station does not support UPIP;

A handover module, configured to switch from being connected with the source base station to being connected with the target base station according to the handover command.

Optionally, the data transmission apparatus further includes a sending module configured to send a deactivation request of the UPIP PDU session to the target base station when the PDU session established between the source base station and the source base station includes a UPIP PDU session. .

An eighth aspect of the present invention provides a data transmission method, comprising:

Monitor system information of at least one base station, where the system information includes indication information used to characterize whether the base station or a cell in the base station supports UPIP;

Selecting a target base station or a target cell supporting UPIP according to the system information;

A connection is established with the target base station or the target cell.

A ninth aspect of the present invention provides a data transmission device, comprising:

a monitoring module, configured to monitor system information of at least one base station, where the system information includes indication information used to characterize whether the base station or a cell in the base station supports UPIP;

a selection module, configured to select a target base station or a target cell supporting UPIP according to the system information;

A connection module, configured to establish a connection with the target base station or the target cell.

A tenth aspect of the present invention provides a user equipment, comprising:

at least one processor;

a memory communicatively coupled to the at least one processor; and

Transceivers for communicating with other devices;

Wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the sixth aspect or the eighth aspect. data transfer method.

An eleventh aspect of the present invention provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to execute the above-mentioned data transmission method.

The positive improvement effect of the present invention is: based on the indication information for characterizing whether the target base station supports UPIP, it is determined whether to send a handover command to the user equipment, that is, to determine whether to switch the user equipment from connecting with the source base station to connecting with the target base station. Compared with the method of switching network in the prior art, the present invention selects whether to switch the network when it is clear whether the target base station supports UPIP, which can improve the stability of the UPIP PDU session of the user equipment, thereby improving the user experience.

Description of drawings

FIG. 1 is a schematic diagram of a method for handover from a connection between a UE and a gNB to a connection between a UE and an eNB in the prior art.

FIG. 2 is a schematic diagram of a communication network architecture according to an embodiment of the present invention.

FIG. 3 is a flowchart of a data transmission method according to Embodiment 1 of the present invention.

FIG. 4 is a flowchart of a data transmission method according to Embodiment 2 of the present invention.

Detailed ways

The present invention is further described below by way of examples, but the present invention is not limited to the scope of the described examples.

Hereinafter, exemplary application scenarios of the embodiments of the present invention are introduced.

The technical solution of the present invention can be applied to 4G (4 Generation) and 3G communication systems, as well as to communication systems including 5G and 4G/3G, as well as to various future communication systems such as 6G, 7G, etc. And 4G/3G communication system. The technical solution of the present invention is also applicable to different network architectures, including but not limited to a relay network architecture, a dual-link architecture, a Vehicle-to-Everything (vehicle-to-everything) architecture, and other architectures. This embodiment of the present invention does not make restrictions. This embodiment of the present invention does not limit this. The base station in the embodiment of the present invention may be a communication network providing communication services for terminals, including a base station of a wireless access network, and may also include a base station controller of a wireless access network, or Including devices on the core network side. The base station controller is a device that manages base stations, such as a base station controller (BSC) in a 2G network, a radio network controller (RNC) in a 3G network, and can also refer to A device for controlling and managing base stations in future new communication systems.

In an optional implementation manner, FIG. 2 is a schematic diagram of a communication network architecture provided by an embodiment of the present invention. As shown in FIG. 2 , data communication is performed between the user equipment 130 and the base station 110 or the base station 120 . User equipment (UE for short) in this embodiment of the present invention may refer to various forms of access terminals, subscriber units, subscriber stations, mobile stations, mobile stations (mobile stations, built as MSs), remote stations, remote terminals, Mobile equipment, user terminal, terminal equipment, wireless communication equipment, user agent or user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices with wireless communication capabilities, terminal devices in future 5G networks or future evolved public land mobile communication networks (Public Land Mobile Network, referred to for short) PLMN), which is not limited in this embodiment of the present invention.

A base station (base station, BS for short) in this embodiment of the present invention, which may also be referred to as base station equipment, is a device deployed in a radio access network (RAN) to provide a wireless communication function. For example, devices that provide base station functions in 2G networks include base transceiver stations (BTS for short), devices that provide base station functions in 3G networks include Node Bs (NodeBs), and devices that provide base station functions in 4G networks include evolved Node B (evolved NodeB, eNB), in wireless local area networks (wireless local area networks, referred to as WLAN), the device that provides the base station function is the access point (access point, referred to as AP), 5G new wireless (New Radio, referred to as WLAN) The device gNB that provides base station functions in NR), and the node B (ng-eNB) that continues to evolve, wherein the gNB and the terminal use NR technology to communicate, and the ng-eNB and the terminal use E-UTRA (Evolved Universal Terrestrial). Radio Access) technology to communicate, both gNB and ng-eNB can be connected to the 5G core network (core network, CN for short). The base station in the embodiment of the present invention also includes a device and the like that provide the function of the base station in a new communication system in the future. This embodiment of the present invention does not limit this.

Example 1

FIG. 3 is a schematic flowchart of a data transmission method provided in this embodiment. The method may be executed by a data transmission apparatus, which may be implemented in software and/or hardware, and may include part or all of a base station. The data transmission method will be described below in conjunction with the base station as the execution subject.

As shown in FIG. 3 , the data transmission method provided in this embodiment is applied to a source base station that establishes a connection with a user equipment, and may include the following steps S101 and S102:

Step S101: Obtain indication information for characterizing whether the target base station supports UPIP.

In an optional implementation manner, step S101 is performed in the process of switching networks. Specifically, step S101 includes steps S101a and S101b:

Step S101a, sending a handover requirement to the mobility management function; wherein, the handover requirement includes the information of the target base station and a request requiring the target base station to indicate whether UPIP is supported.

The mobility management function is located in the core network of the source base station. When the core network of the source base station is the core network of the 5G network, the mobility management function is the access and mobility control function AMF. When the core network of the source base station is the core network of the 4G network, the mobility management function is the mobility management entity MME of the 4G network.

In the specific implementation of step S101a, if the core network of the source base station and the core network of the target base station are different networks, the mobility management function located in the core network of the source base station forwards the handover request to the core network located in the target base station and the mobility management function located in the core network of the target base station forwards the handover request to the target base station. If the core network of the source base station and the core network of the target base station are the same network, the mobility management function directly forwards the handover request to the target base station.

Step S101b: Receive indication information sent by the target base station and used to characterize whether the target base station supports UPIP.

In an example of the specific implementation of step S101b, if the target base station supports UPIP, the above-mentioned request requiring the target base station to indicate whether UPIP is supported is ignored. If the target base station does not support UPIP, then reply indication information indicating that the target base station does not support UPIP.

The same as above, if the core network of the source base station and the core network of the target base station are different networks, the target base station sends the above indication information to the mobility management function located in the core network of the target base station, and the mobile phone located in the core network of the target base station sends the above indication information. The mobility management function forwards the above indication information to the mobility management function located in the core network of the source base station, and the mobility management function located in the core network of the source base station forwards the above indication information to the source base station. If the core network of the source base station and the core network of the target base station are the same network, the target base station sends the above-mentioned indication information to the mobility management function located in the core network of the target base station, and the mobility management function forwards it to the source base station the above instructions.

In another optional implementation manner, step S101 is performed before switching networks. Specifically, step S101 includes monitoring system information of a target base station through a wireless air interface, and acquiring indication information for characterizing whether the target base station supports UPIP from the system information.

In this embodiment, the target base station broadcasts system information through the wireless air interface, and the source base station monitors the system information of the target base station through the wireless air interface. Wherein, the system information includes indication information for indicating whether the target base station supports UPIP. In an example of specific implementation, a bit in the system information SIB1 is used to indicate whether UPIP is supported. In another example of specific implementation, a bit in the system information SIB3 is used to indicate whether UPIP is supported.

In another optional implementation manner, the user equipment monitors system information of a nearby base station, and acquires, from the system information, indication information for characterizing whether the base station supports UPIP. The user equipment reports the measurement report of the nearby base station to the source base station, wherein the measurement report includes the above-mentioned indication information, and the source base station selects the target base station from it. In a specific example, the source base station preferentially selects a base station supporting UPIP as the target base station. In another specific example, the user equipment only reports the measurement report of the base station supporting UPIP to the source base station, and the source base station selects the target base station from it.

Step S102: Determine whether to send a handover command to the user equipment based on the indication information. The handover command is used to instruct the user equipment to switch from connecting with the source base station to connecting with the target base station. The handover command in this embodiment is used to switch the network connected to the user equipment, that is, to switch the user equipment from being connected to a currently connected base station to being connected to another base station.

It should be noted that the core networks of the source base station and the target base station may be the same network, or may be different networks. In a specific example, the base station 110 shown in FIG. 2 is the source base station, the base station 120 is the target base station, and the user equipment 130 switches from connecting with the base station 110 to connecting with the base station 120 after receiving the handover command. In another specific example, the base station 120 shown in FIG. 2 is the source base station, the base station 110 is the target base station, and the user equipment 130 switches from connecting with the base station 120 to connecting with the base station 110 after receiving the handover command.

In an optional implementation manner of step S102, if the indication information indicates that the target base station supports UPIP, a handover command is sent to the user equipment.

In another optional implementation manner of step S102, if the indication information indicates that the target base station does not support UPIP, a handover command is sent to the user equipment, wherein the handover command includes information of the target base station and is used to indicate the target base station. The target base station does not support UPIP message.

In another optional implementation manner of step S102, if the indication information indicates that the target base station does not support UPIP, it is determined whether to send a handover command to the user equipment according to the PDU session established with the user equipment.

In a specific implementation, the PDU session established between the source base station and the user equipment includes the following three situations:

Case 1: If the PDU session established with the user equipment only includes the UPIP PDU session, no handover command is sent to the user equipment, that is, no network handover is performed.

Case 2: If the PDU session established with the user equipment includes a UPIP PDU session and a non-UPIP PDU session, a handover command is sent to the user equipment, wherein the handover command includes a resource request for the PDU session to be switched, and the The PDU sessions to be switched only include non-UPIP PDU sessions. In this embodiment, since the target base station does not support UPIP, the source base station only switches the non-UPIP PDU session with the user equipment to the target base station.

In an optional implementation manner of case 2, the above-mentioned data transmission method further includes:

A deactivation request for the UPIP PDU session is sent to the mobility management function. In this embodiment, the user equipment establishes a connection with the target base station after receiving the handover command, and the source base station needs to send a deactivation request of the UPIP PDU session to the mobility management function located in the core network of the source base station, so as to avoid the connection between the user equipment and the source base station. It occurs when the UPIP PDU session established before the base station disconnects occupies network resources.

It should be noted that a UPIP PDU session refers to a PDU session that requires UPIP, and a non-UPIP PDU session refers to a PDU session that does not require UPIP.

In an example of specific implementation, the deactivation request sent by the source base station to the mobility management function carries a deactivation reason, and the deactivation reason is that the target base station does not support UPIP. In this embodiment, the mobility management function can implement network analysis by recording the deactivation reason sent by the source base station. For example, if more source base stations deactivate UPIP PDU sessions because the target base station does not support UPIP, the target base station can be upgraded to support UPIP later to improve the stability of the UPIP PDU session. If fewer source base stations deactivate UPIP PDU sessions because the target base station does not support UPIP, the target base station may not be upgraded temporarily to save costs.

Case 3: If the PDU session established with the user equipment only includes a non-UPIP PDU session, a handover command is sent to the user equipment, wherein the handover command includes a resource request for the PDU session to be switched, and the PDU to be switched Sessions are non-UPIP PDU sessions.

In step S102, if the source base station determines to send a handover command to the user equipment, the user equipment receives the handover command sent by the source base station, and switches from connecting with the source base station to connecting with the target base station according to the handover command. Wherein, the handover command includes the information of the target base station.

In an optional implementation manner, if the target base station does not support UPIP, the above handover command further includes a message for indicating that the target base station does not support UPIP. In this embodiment, the source base station notifies the user equipment that the target base station does not support UPIP, so as to facilitate the user equipment to manage the UPIP PDU session.

In an optional implementation manner, if the target base station does not support UPIP, and the PDU session established between the user equipment and the source base station before includes a UPIP PDU session, after the user equipment completes the network handover, send the UPIP PDU to the target base station Session deactivation request. In this embodiment, the UPIP PDU session established between the source base station and the user equipment is switched to the target base station that does not support UPIP, and then the user equipment sends a deactivation request for the UPIP PDU session to the target base station, thereby avoiding the UPIP PDU session A connection is established between the user equipment and the target base station, but the UPIP service cannot actually be performed.

Compared with the method for switching networks in the prior art, this embodiment selects whether to switch networks when it is clear whether the target base station supports UPIP, which can improve the stability of the UPIP PDU session of the user equipment, thereby improving user experience.

This embodiment also provides a data transmission device, including an acquisition module and a determination module.

The obtaining module is used for obtaining indication information for characterizing whether the target base station supports UPIP.

The determining module is configured to determine whether to send a handover command to the user equipment based on the indication information, wherein the handover command is used to instruct the user equipment to switch from connecting with the source base station to connecting with the target base station.

In an optional implementation manner, the obtaining module includes:

a sending unit, configured to send a handover requirement to the mobility management function; wherein, the handover requirement includes information of a target base station and a request requiring the target base station to indicate whether UPIP is supported;

In an optional implementation manner, the obtaining module is specifically configured to monitor system information of the target base station, and obtain, from the system information, indication information that is used to characterize whether the target base station supports UPIP.

In an optional implementation manner, the determining module is specifically configured to send a handover command to the user equipment when the indication information indicates that the target base station does not support UPIP, wherein the handover command The target base station does not support UPIP message.

In an optional implementation manner, the determining module is specifically configured to send a handover command to the user equipment when the indication information indicates that the target base station supports UPIP.

In an optional implementation manner, the determining module is specifically configured to determine whether to send data to the user equipment according to the PDU session established with the user equipment when the indication information indicates that the target base station does not support UPIP switch command.

In an optional implementation manner, the indication information represents that the target base station does not support UPIP, and the determining module is specifically used for the case where the PDU session established with the user equipment only includes the UPIP PDU session, and does not report to the The user equipment sends a handover command;

In an optional implementation manner, the indication information represents that the target base station does not support UPIP, and the determining module is specifically configured to be used in the case that the PDU session established with the user equipment includes a UPIP PDU session and a non-UPIP PDU session , sending a handover command to the user equipment, wherein the handover command includes a resource request for a PDU session to be handed over, and the PDU session to be handed over only includes a non-UPIP PDU session.

In an optional implementation manner, the data transmission apparatus further includes a sending module, configured to send a deactivation request of the UPIP PDU session to the mobility management function when it is determined to send a handover command to the user equipment.

In an optional implementation manner, the deactivation request carries a deactivation reason, and the deactivation reason is that the target base station does not support UPIP.

This embodiment also provides a data transmission apparatus, including a broadcasting module for broadcasting system information, wherein the system information includes indication information for indicating whether the base station supports UPIP.

Example 2

The data transmission method provided in this embodiment may be executed by a data transmission apparatus, and the apparatus may be implemented by means of software and/or hardware, and the apparatus may include part or all of user equipment. The data transmission method will be described below in conjunction with the user equipment as the execution subject.

The data transmission method provided by this embodiment includes the following steps S201 and S202:

Step S201: Receive a handover command sent by a source base station, where the handover command includes information of a target base station and a message for indicating that the target base station does not support UPIP.

Step S202, switching from connecting with the source base station to connecting with the target base station according to the switching command.

In an optional implementation manner, the above-mentioned data transmission method further includes:

Step S203, if the previously established PDU session with the source base station includes a UPIP PDU session, send a deactivation request for the UPIP PDU session to the target base station.

This embodiment also provides a data transmission device, including a receiving module and a switching module.

The receiving module is configured to receive a handover command sent by the source base station, where the handover command includes information of the target base station and a message used to indicate that the target base station does not support UPIP.

The handover module is used for handover from connecting with the source base station to connecting with the target base station according to the handover command.

In an optional implementation manner, the above-mentioned data transmission apparatus further includes a sending module, configured to send a UPIP PDU to the target base station in the case that the PDU session established with the source base station before includes a UPIP PDU session Session deactivation request.

Example 3

4 is a schematic flowchart of a data transmission method provided in this embodiment. The method may be executed by a data transmission apparatus, which may be implemented in software and/or hardware, and may include part or all of user equipment. The data transmission method will be described below in conjunction with the user equipment as the execution subject.

As shown in FIG. 4 , the data transmission method provided in this embodiment is applied to a user equipment in an idle state, and may include the following steps S401 and S403:

Step S401: Monitor system information of at least one base station, where the system information includes indication information for characterizing whether the base station or a cell in the base station supports UPIP.

In this embodiment, the base station sends system information through the wireless air interface, where the system information includes an indication message for indicating whether the base station or a cell in the base station supports UPIP, and the user equipment in the idle state monitors the system of each base station through the wireless air interface information.

Step S402: Select a target base station or a target cell supporting UPIP according to the system information. The user equipment selects a base station supporting UPIP from each base station as a target base station according to the monitored system information, or selects a cell supporting UPIP in the base station as a target cell.

Step S403: Establish a connection with the target base station or the target cell. The user equipment establishes a connection with the target base station or target cell, and establishes a UPIP PDU session with the target base station or target cell when the user equipment has UPIP service requirements.

In this embodiment, the user equipment in the idle state only establishes a connection with the target base station or target cell that supports UPIP based on the monitored system information, so that the user equipment can process the UPIP service, thereby improving user experience.

This embodiment also provides a data transmission device, including a monitoring module, a selection module, and a connection module.

The monitoring module is configured to monitor system information of at least one base station, where the system information includes indication information used to characterize whether the base station or a cell in the base station supports UPIP.

The selection module is configured to select a target base station or a target cell supporting UPIP according to the system information.

The connection module is configured to establish a connection with the target base station or the target cell.

Example 4

An embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are used to cause the computer to execute the data transmission method in Embodiment 1, Embodiment 2, or Embodiment 3.

Wherein, the readable storage media may include, but are not limited to, portable disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, optical storage devices, magnetic storage devices, or any of the above suitable combination.

In a possible implementation manner, the present invention can also be implemented in the form of a program product, which includes program codes, when the program product runs on a terminal device, the program code is used to cause the terminal device to execute the implementation The data transmission method in Embodiment 1, Embodiment 2 or Embodiment 3.

Wherein, the program code for executing the present invention can be written in any combination of one or more programming languages, and the program code can be completely executed on the user equipment, partially executed on the user equipment, as an independent The software package executes on the user's device, partly on the user's device, partly on the remote device, or entirely on the remote device.

Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an illustration, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

A data transmission method, comprising the following steps:

Obtain indication information used to characterize whether the target base station supports UPIP;

Whether to send a handover command to the user equipment is determined based on the indication information, wherein the handover command is used to instruct the user equipment to switch from connecting with the source base station to connecting with the target base station.
The data transmission method according to claim 1, wherein the acquiring the indication information for characterizing whether the target base station supports UPIP specifically includes:

Send a handover requirement to the mobility management function; wherein, the handover requirement includes the information of the target base station and the request that the target base station needs to indicate whether UPIP is supported;

Receive indication information sent by the target base station and used to characterize whether the target base station supports UPIP.
The data transmission method according to claim 1, wherein the acquiring the indication information for characterizing whether the target base station supports UPIP specifically includes:

The system information of the target base station is monitored, and the indication information used to characterize whether the target base station supports UPIP is obtained from the system information.
The data transmission method according to claim 1, wherein the determining whether to send a handover command to the user equipment based on the indication information specifically includes:

If the indication information indicates that the target base station does not support UPIP, send a handover command to the user equipment, wherein the handover command includes a message for indicating that the target base station does not support UPIP;

and / or,

If the indication information indicates that the target base station supports UPIP, a handover command is sent to the user equipment.
The data transmission method according to claim 1, wherein the determining whether to send a handover command to the user equipment based on the indication information specifically includes:

If the indication information indicates that the target base station does not support UPIP, it is determined whether to send a handover command to the user equipment according to the PDU session established with the user equipment.
The data transmission method according to claim 5, wherein the determining whether to send a handover command to the user equipment according to the PDU session established with the user equipment specifically includes:

If the PDU session established with the user equipment only includes the UPIP PDU session, the handover command is not sent to the user equipment;

and / or,

If the PDU session established with the user equipment includes a UPIP PDU session and a non-UPIP PDU session, a handover command is sent to the user equipment, wherein the handover command includes a resource request for the PDU session to be switched, and the PDU to be switched Sessions include only non-UPIP PDU sessions.
The data transmission method according to claim 5, wherein, in the case that it is determined to send a handover command to the user equipment, the data transmission method further comprises:

A deactivation request for the UPIP PDU session is sent to the mobility management function.
The data transmission method according to claim 7, wherein the deactivation request carries a deactivation reason, and the deactivation reason is that the target base station does not support UPIP.
A data transmission device, comprising:

an acquisition module, used to acquire indication information used to characterize whether the target base station supports UPIP;

A determining module, configured to determine whether to send a handover command to the user equipment based on the indication information, wherein the handover command is used to instruct the user equipment to switch from being connected with the source base station to being connected with the target base station.
The data transmission device according to claim 9, wherein the acquisition module comprises:

a sending unit, configured to send a handover requirement to the mobility management function; wherein, the handover requirement includes information of a target base station and a request requiring the target base station to indicate whether UPIP is supported;

A receiving unit, configured to receive the indication information sent by the target base station and used to represent whether the target base station supports UPIP.
The data transmission device according to claim 9, wherein the acquisition module is specifically configured to monitor the system information of the target base station, and acquire from the system information indication information used to characterize whether the target base station supports UPIP .
The data transmission apparatus according to claim 9, wherein the determining module is specifically configured to send a handover command to the user equipment when the indication information indicates that the target base station does not support UPIP, wherein the handover command including a message for indicating that the target base station does not support UPIP,

and / or,

The determining module is specifically configured to send a handover command to the user equipment when the indication information indicates that the target base station supports UPIP.
The data transmission apparatus according to claim 9, wherein the determining module is specifically configured to determine whether to send the data to the user equipment according to the PDU session established with the user equipment under the condition that the indication information indicates that the target base station does not support UPIP. The user equipment sends a handover command.
The data transmission apparatus according to claim 13, wherein the indication information represents that the target base station does not support UPIP,

The determining module is specifically used for the situation that the PDU session established with the user equipment only includes the UPIP PDU session, and does not send a handover command to the user equipment;

and / or,

The determining module is specifically configured to send a handover command to the user equipment when the PDU session established with the user equipment includes a UPIP PDU session and a non-UPIP PDU session, wherein the handover command includes a to-be-switched PDU session resource request, the to-be-switched PDU sessions only include non-UPIP PDU sessions.
The data transmission apparatus according to claim 13, wherein the data transmission apparatus further comprises a sending module, configured to send the UPIP PDU session to the mobility management function under the condition that it is determined to send a handover command to the user equipment deactivation request.
The data transmission apparatus according to claim 15, wherein the deactivation request carries a deactivation reason, and the deactivation reason is that the target base station does not support UPIP.
A data transmission method, characterized in that the data transmission method comprises the following steps:

Broadcast system information, where the system information includes indication information used to indicate whether the base station supports UPIP.
A data transmission apparatus, characterized in that it includes a broadcasting module for broadcasting system information, wherein the system information includes indication information for indicating whether a base station supports UPIP.
A base station, characterized in that it includes:

at least one processor;

a memory communicatively coupled to the at least one processor; and

Transceivers for communicating with other devices;

wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to execute any of claims 1-8 or 17 A method of data transmission as described.
A data transmission method, characterized in that the data transmission method comprises the following steps:

receiving a handover command sent by a source base station, where the handover command includes information of a target base station and a message used to indicate that the target base station does not support UPIP;

According to the handover command, the connection with the source base station is switched to the connection with the target base station.
The data transmission method of claim 20, wherein the data transmission method further comprises:

If the previously established PDU session with the source base station includes a UPIP PDU session, a deactivation request for the UPIP PDU session is sent to the target base station.
A data transmission device, comprising:

a receiving module, configured to receive a handover command sent by a source base station, where the handover command includes information of a target base station and a message for indicating that the target base station does not support UPIP;

A handover module, configured to switch from being connected with the source base station to being connected with the target base station according to the handover command.
The data transmission apparatus according to claim 22, characterized in that, the data transmission apparatus further comprises a sending module, configured to send a message to the source base station in the case that the PDU session established with the source base station before includes a UPIP PDU session The target base station sends a deactivation request for the UPIP PDU session.
A data transmission method, characterized in that the data transmission method comprises:

Monitor system information of at least one base station, where the system information includes indication information used to characterize whether the base station or a cell in the base station supports UPIP;

Selecting a target base station or a target cell supporting UPIP according to the system information;

A connection is established with the target base station or the target cell.
A data transmission device, comprising:

a monitoring module, configured to monitor system information of at least one base station, where the system information includes indication information used to characterize whether the base station or a cell in the base station supports UPIP;

a selection module, configured to select a target base station or a target cell supporting UPIP according to the system information;

A connection module, configured to establish a connection with the target base station or the target cell.
A user equipment, characterized in that it includes:

at least one processor;

a memory communicatively coupled to the at least one processor; and

Transceivers for communicating with other devices;

wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to execute any of claims 20-21 or 24 A method of data transmission as described.
A non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to execute any one of claims 1-8, 17 or 20-21, 24. data transfer method.