CN107846703B

CN107846703B - Data transmission method and device

Info

Publication number: CN107846703B
Application number: CN201610836648.1A
Authority: CN
Inventors: 张娟; 王胡成
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-09-21
Filing date: 2016-09-21
Publication date: 2020-06-05
Anticipated expiration: 2036-09-21
Also published as: CN107846703A

Abstract

The invention provides a data transmission method and a data transmission device, relates to the technical field of communication, and aims to improve the reliability of data transmission and service. The data transmission method of the invention comprises the following steps: when a user plane anchor point needs to be added or deleted for an activated Protocol Data Unit (PDU) session, indicating an IP anchor point corresponding to the PDU session to cache a downlink data packet; indicating the user plane anchor point and the IP anchor point to update the user plane path; instructing the RAN to update the user plane path; and indicating the IP anchor point to send a downlink data packet through the updated user plane path. The invention is mainly used in the data transmission technology.

Description

Data transmission method and device

Technical Field

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

Background

In an LTE (Long Term Evolution) system, user plane nodes in a Network include a PGW (Packet Data Network Gateway), an SGW (Serving Gateway), and an eNB (Evolved Node B). These nodes have both control plane and user plane functionality. The PGW is an IP anchor point, and is responsible for allocating an IP address to a UE (User Equipment) and routing data to an external network. The SGW is a mobility anchor point, and the SGW may change according to a change in the UE location during the UE movement.

In 5G systems, an important technical trend is the separation of the control plane and the user plane. The control plane is responsible for the functions of session establishment, modification and deletion, tunnel establishment, address allocation, user plane gateway selection and the like; the user plane network manager mainly has the function of being responsible for routing and forwarding data packets.

Generally speaking, if the UE is in the home network and does not roam, in order to reduce the Data transmission delay, the control plane may select a user plane anchor point for a PDU (Protocol Data Unit) session of the UE.

In a 5G system, there is no need to have one aggregated user plane node, i.e. SGW, for an established PDU session of a UE to a different network, as in the LTE system. The core network user plane anchor points selected by the PDU sessions to different networks may be relatively independent of each other without any aggregation relationship. However, for establishing different PDU sessions to the same network, aggregation to the same user plane anchor point is required for the control and charging functions of AMBR (Aggregated Maximum Bit Rate).

Therefore, for a PDU session, there may be a scenario that, as shown in fig. 1, when the UE establishes a first PDU session to a certain data network, the core network control plane selects a User plane anchor point UPGW (User plane gateway) 1 for the UE. When the UE initiates a second PDU session setup to this data network, the core network needs to insert an aggregated user plane anchor point UPGW2 between the RAN (radio access network) and the UPGW 1. At this point, both user planes of PDU sessions to the same data network need to be transmitted via the aggregation anchor UPGW 2.

When the user plane path switching is performed, if there is uplink and downlink data packet transmission in the network, packet loss or receiving end node error reporting may occur, thereby affecting the reliability of data transmission and service.

Disclosure of Invention

In view of this, the present invention provides a data transmission method and apparatus, so as to improve reliability of data transmission and service.

In order to solve the above technical problem, the present invention provides a data transmission method, including:

when a user plane anchor point needs to be added or deleted for an activated Protocol Data Unit (PDU) session, indicating an IP anchor point corresponding to the PDU session to cache a downlink data packet;

indicating the user plane anchor point and the IP anchor point to update the user plane path;

instructing a Radio Access Network (RAN) to update a user plane path;

and indicating the IP anchor point to send a downlink data packet through the updated user plane path.

When a user plane anchor point needs to be added or deleted for an activated Protocol Data Unit (PDU) session, the method further comprises the following steps:

instructing the RAN to cache an uplink data packet;

the instructing the RAN to cache the uplink data packet includes:

sending a suspend message to the RAN, the suspend message being used to instruct the RAN to cache an uplink data packet;

the indicating the IP anchor point corresponding to the PDU session to cache the downlink data packet includes:

and sending a suspension message to the IP anchor point, wherein the suspension message is used for indicating the IP anchor point to cache the downlink data packet.

Wherein, when a user plane anchor point needs to be added for the activated PDU session, the indicating the user plane anchor point and the IP anchor point to update the user plane path includes:

sending a first user plane updating instruction to the user plane anchor point, wherein the first user plane updating instruction comprises: tunnel identification and IP address of the user plane anchor, tunnel identification and IP address of the RAN, tunnel identification and IP address of the IP anchor;

sending a second user plane updating instruction to the IP anchor point, wherein the second user plane updating instruction comprises: the tunnel identifier and the IP address of the user plane anchor point;

the first user plane update instruction is used for establishing a tunnel between the RAN and the user plane anchor point and establishing a tunnel between the user plane anchor point and the IP anchor point;

the second user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the IP anchor and the user plane anchor.

Wherein, when a user plane anchor point needs to be added for an activated PDU session, the instructing a radio access network RAN to perform user plane path update includes:

sending a third user plane update instruction to the RAN, where the third user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point;

the third user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the RAN and the user plane anchor.

Wherein, when a user plane anchor needs to be deleted for an activated PDU session, the indicating the user plane anchor and the IP anchor to update the user plane path comprises:

sending a fourth user plane updating instruction to the user plane anchor point;

sending a fifth user plane updating instruction to the IP anchor point, wherein the fifth user plane updating instruction comprises: a tunnel identity and an IP address of the RAN;

the fourth user plane updating instruction is used for indicating the user plane anchor point to delete the information related to the PDU session;

and the fifth user plane updating instruction is used for updating the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the IP anchor point and the RAN.

Wherein, when the user plane anchor point needs to be deleted for the activated PDU session, the instructing radio access network sends a sixth user plane update instruction to the RAN, and the sixth user plane update instruction includes: the tunnel identifier and the IP address of the IP anchor point;

the sixth user plane update instruction is configured to update the tunnel between the RAN and the user plane anchor to the tunnel between the RAN and the IP anchor.

Wherein, the instructing the IP anchor to send a downlink data packet through the updated user plane path includes:

receiving a user plane update response message sent by the RAN;

according to the user plane updating response message, sending a suspension releasing message to the IP anchor point;

when a user plane anchor point needs to be added for the activated PDU session, the suspension release message is used for triggering the IP anchor point to send a downlink data packet through a tunnel between the RAN and the user plane anchor point;

when a user plane anchor point needs to be deleted for the activated PDU session, the suspension release message is used for triggering the IP anchor point to send a downlink data packet through a tunnel between the RAN and the IP anchor point.

In a second aspect, the present invention provides a data transmission method, including:

when a user plane anchor point needs to be added or deleted for an activated protocol data unit PDU session, caching an uplink data packet according to the indication of a core network control plane functional entity;

updating a user plane path according to the indication of the core network control plane functional entity;

and sending the uplink data packet through the updated user plane path.

Wherein, the caching the uplink data packet according to the indication of the core network control plane functional entity includes:

receiving a suspension message of the core network control plane functional entity;

and buffering the received uplink data packet according to the suspension message.

When a user plane anchor point needs to be added for an activated PDU session, the updating a user plane path according to an instruction of the core network control plane function entity includes:

receiving a third user plane update instruction of the core network control plane functional entity, where the third user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point;

and updating the tunnel between the IP anchor point and the third user plane updating instruction into the tunnel between the user plane anchor point and the tunnel between the IP anchor point and the third user plane anchor point.

Wherein, when the user plane anchor point needs to be deleted for the activated PDU session, the updating the user plane path according to the indication of the core network control plane function entity includes:

receiving a sixth user plane update instruction of the core network control plane functional entity, where the sixth user plane update instruction includes: the tunnel identification and the IP address of the IP anchor point corresponding to the PDU session;

and updating the tunnel between the user plane anchor point and the IP anchor point into the tunnel between the IP anchor point and the user plane anchor point according to the sixth user plane updating instruction.

Wherein, when a user plane anchor point needs to be added for an activated PDU session, the sending of the uplink data packet through the updated user plane path includes: sending an uplink data packet through a tunnel between the user plane anchor point and the user plane anchor point;

when the user plane anchor point needs to be deleted for the activated PDU session, the sending of the uplink data packet through the updated user plane path includes: and sending the uplink data packet through a tunnel between the IP anchor point and the uplink data packet.

Wherein, after the updating the user plane path according to the indication of the core network control plane function entity, the method further includes:

and sending a user plane update response message to the core network control plane functional entity, where the user plane update response message is used to trigger the core network control plane functional entity to send a release message to the IP anchor point corresponding to the PDU session.

In a third aspect, the present invention provides a data transmission method, including:

when a user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session, caching a downlink data packet according to the indication of a core network control plane functional entity;

and sending the downlink data packet through the updated user plane path.

Wherein, the caching the downlink data packet according to the indication of the core network control plane functional entity includes:

and caching the received downlink data packet according to the suspension message.

receiving a second user plane update instruction of the core network control plane functional entity, where the second user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point;

and updating the tunnel between the RAN and the user plane anchor point into the tunnel between the RAN and the user plane anchor point according to the second user plane updating instruction.

receiving a fifth user plane update instruction of the core network control plane functional entity, where the fifth user plane update instruction includes: a tunnel identity and an IP address of the RAN;

and updating the tunnel between the user plane anchor point and the RAN into the tunnel between the RAN and the RAN according to the fifth user plane updating instruction.

Wherein, the sending the downlink data packet through the updated user plane path includes:

receiving a release message of the core network control plane functional entity;

when a user plane anchor point needs to be added for the activated PDU session, sending a downlink data packet through a tunnel between the RAN and the user plane anchor point according to the suspension release message;

and when the user plane anchor point needs to be deleted for the activated PDU session, sending a downlink data packet through a tunnel between the RAN and the UE according to the suspension release message.

In a fourth aspect, the present invention provides a data transmission method, including:

and when the user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session, updating the user plane path according to the indication of the core network control plane functional entity.

When a user plane anchor point needs to be added for an activated PDU session, the updating a user plane path according to an instruction of a core network control plane function entity includes:

receiving a first user plane update instruction of the core network control plane functional entity, where the first user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point, the tunnel identifier and the IP address of the RAN and the tunnel identifier and the IP address of the IP anchor point;

and establishing a tunnel with the RAN and a tunnel with the IP anchor point according to the first user plane updating instruction.

Wherein, when the user plane anchor point needs to be deleted for the activated PDU session, the updating the user plane path according to the indication of the core network control plane functional entity includes:

receiving a fourth user plane update instruction of the core network control plane functional entity;

and deleting the information related to the PDU conversation according to the fourth user plane updating instruction.

When a user plane anchor point needs to be added for the activated PDU session, the method further comprises the following steps:

and transmitting the uplink and downlink data packets through the tunnel between the RAN and the mobile terminal.

In a fifth aspect, the present invention provides a data transmission apparatus, including:

a first indicating module, configured to indicate an IP anchor corresponding to an activated protocol data unit PDU session to cache a downlink data packet when a user plane anchor needs to be added or deleted for the PDU session;

a first path updating indication module, configured to indicate the user plane anchor point and the IP anchor point to perform user plane path updating;

a second path update indication module, configured to indicate the radio access network RAN to perform user plane path update;

and the second indicating module is used for indicating the IP anchor point to send a downlink data packet through the updated user plane path.

The first indication module is further configured to indicate the RAN to cache an uplink data packet when a user plane anchor needs to be added or deleted for an activated PDU session;

the first indication module comprises:

a first suspend message sending sub-module, configured to send a suspend message to the RAN, where the suspend message is used to instruct the RAN to cache an uplink data packet;

and the second hang message sending submodule is used for sending a hang message to the IP anchor point, and the hang message is used for indicating the IP anchor point to cache the downlink data packet.

Wherein the first path update indication module comprises:

a first user plane update instruction sending submodule, configured to send a first user plane update instruction to an activated PDU session when a user plane anchor needs to be added to the PDU session, where the first user plane update instruction includes: tunnel identification and IP address of the user plane anchor, tunnel identification and IP address of the RAN, tunnel identification and IP address of the IP anchor;

a second user plane update instruction sending submodule, configured to send a second user plane update instruction to the IP anchor point when a user plane anchor point needs to be added for an activated PDU session, where the second user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point;

Wherein the second path update indication module is specifically configured to: when a user plane anchor point needs to be added for the activated PDU session, sending a third user plane update instruction to the RAN, wherein the third user plane update instruction comprises: the tunnel identifier and the IP address of the user plane anchor point;

Wherein the first path update indication module comprises:

a fourth user plane updating instruction sending submodule, configured to send a fourth user plane updating instruction to the user plane anchor point when the user plane anchor point needs to be deleted for the activated PDU session;

a fifth user plane update instruction sending sub-module, configured to send a fifth user plane update instruction to the IP anchor when a user plane anchor needs to be deleted for an activated PDU session, where the fifth user plane update instruction includes: a tunnel identity and an IP address of the RAN;

Wherein the second path update indication module is specifically configured to: when the user plane anchor point needs to be deleted for the activated PDU session, a sixth user plane update instruction is sent to the RAN, and the sixth user plane update instruction comprises: the tunnel identifier and the IP address of the IP anchor point;

Wherein the second indication module comprises:

a receiving submodule, configured to receive a user plane update response message sent by the RAN;

the sending submodule is used for sending a suspension releasing message to the IP anchor point according to the user plane updating response message;

In a sixth aspect, the present invention provides a data transmission apparatus, including:

the buffer module is used for buffering the uplink data packet according to the indication of the core network control plane functional entity when the user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session;

a path updating module, configured to update a user plane path according to an instruction of the core network control plane functional entity;

and the data packet sending module is used for sending the uplink data packet through the updated user plane path.

Wherein, the cache module comprises:

the receiving submodule is used for receiving a suspension message of the core network control plane functional entity;

and the buffer submodule is used for buffering the received uplink data packet according to the suspension message.

Wherein the path update module comprises:

a first instruction receiving sub-module, configured to receive a third user plane update instruction of the core network control plane function entity when a user plane anchor needs to be added for an activated PDU session, where the third user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point;

and the first path updating submodule is used for updating the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the IP anchor point and the user plane anchor point according to the third user plane updating instruction.

Wherein the path update module comprises:

a second instruction receiving sub-module, configured to receive a sixth user plane update instruction of the core network control plane function entity when a user plane anchor needs to be deleted for an activated PDU session, where the sixth user plane update instruction includes: the tunnel identification and the IP address of the IP anchor point corresponding to the PDU session;

and the second path updating submodule is used for updating the tunnel between the user plane anchor point and the IP anchor point into the tunnel between the IP anchor point and the user plane anchor point according to the sixth user plane updating instruction.

Wherein the data packet sending module is specifically configured to: when a user plane anchor point needs to be added for the activated PDU session, sending an uplink data packet through a tunnel between the user plane anchor point and the uplink data packet; and when the user plane anchor point needs to be deleted for the activated PDU conversation, sending the uplink data packet through the tunnel between the IP anchor point and the uplink data packet.

Wherein the apparatus further comprises:

and a message sending module, configured to send a user plane update response message to the core network control plane functional entity, where the user plane update response message is used to trigger the core network control plane functional entity to send a suspension release message to the IP anchor corresponding to the PDU session.

In a seventh aspect, the present invention provides a data transmission apparatus, including:

the buffer module is used for buffering the downlink data packet according to the indication of the core network control plane functional entity when the user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session;

and the data packet sending module is used for sending the downlink data packet through the updated user plane path.

Wherein, the cache module comprises:

and the buffer submodule is used for buffering the received downlink data packet according to the suspension message.

Wherein the path update module comprises:

a first instruction receiving sub-module, configured to receive a second user plane update instruction of the core network control plane function entity when a user plane anchor point needs to be added for an activated PDU session, where the second user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point;

and the first path updating submodule is used for updating the tunnel between the RAN and the user plane anchor point into the tunnel between the RAN and the user plane anchor point according to the second user plane updating instruction.

Wherein the path update module comprises:

a second instruction receiving sub-module, configured to receive a fifth user plane update instruction of the core network control plane functional entity when a user plane anchor needs to be deleted for an activated PDU session, where the fifth user plane update instruction includes: a tunnel identity and an IP address of the RAN;

and the second path updating submodule is used for updating the tunnel between the user plane anchor point and the RAN into the tunnel between the RAN and the second path anchor point according to the fifth user plane updating instruction.

Wherein, the data packet sending module comprises:

the receiving submodule is used for receiving an unhook message of the core network control plane functional entity;

a data packet sending sub-module, configured to send a downlink data packet through a tunnel between the RAN and the user plane anchor according to the de-suspend message when a user plane anchor needs to be added for an activated PDU session; and when the user plane anchor point needs to be deleted for the activated PDU session, sending a downlink data packet through a tunnel between the RAN and the UE according to the suspension release message.

In an eighth aspect, the present invention provides a data transmission apparatus, including:

and the path updating module is used for updating the user plane path according to the indication of the core network control plane functional entity when the user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session.

Wherein the path update module comprises:

a first instruction receiving sub-module, configured to receive a first user plane update instruction of the core network control plane function entity when a user plane anchor needs to be added for an activated PDU session, where the first user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point, the tunnel identifier and the IP address of the RAN and the tunnel identifier and the IP address of the IP anchor point;

and the first path updating submodule is used for establishing a tunnel with the RAN and establishing a tunnel with the IP anchor point according to the first user plane updating instruction.

Wherein the path update module comprises:

a second instruction receiving sub-module, configured to receive a fourth user plane update instruction of the core network control plane functional entity when a user plane anchor needs to be deleted for an activated PDU session;

and the second path updating submodule is used for deleting the information related to the PDU session according to the fourth user plane updating instruction.

Wherein the apparatus further comprises:

and the data packet sending module is used for transmitting the uplink and downlink data packets through the tunnel between the RAN and the data packet sending module when the user plane anchor point needs to be added for the activated PDU session.

The technical scheme of the invention has the following beneficial effects:

in the embodiment of the invention, when a user plane anchor point needs to be added or deleted for an activated protocol data unit PDU session, the RAN and the IP anchor point respectively cache the received uplink data packet and downlink data packet, and the updated user plane path is used for sending the downlink data packet after the user plane path is updated. Therefore, the scheme of the embodiment of the invention avoids the situation of packet loss or receiving end node error report in the prior art, and improves the reliability of data transmission and service.

Drawings

FIG. 1 is a schematic diagram of a user plane path in the prior art;

fig. 2 is a flowchart of a data transmission method according to a first embodiment of the present invention;

fig. 3 is a flowchart of a data transmission method according to a second embodiment of the present invention;

fig. 4 is a flowchart of a data transmission method according to a third embodiment of the present invention;

fig. 5 is a flowchart of a data transmission method according to a fourth embodiment of the present invention;

FIG. 6 is a diagram illustrating a process of establishing a PDU session according to an embodiment of the present invention;

fig. 7 is a flowchart of a data transmission method according to a fifth embodiment of the present invention;

fig. 8 is a flowchart of a data transmission method according to a sixth embodiment of the present invention;

fig. 9 is a schematic diagram of a data transmission apparatus according to a seventh embodiment of the present invention;

fig. 10 is a schematic diagram of a data transmission apparatus according to an eighth embodiment of the present invention;

fig. 11 is a further schematic diagram of a data transmission apparatus according to an eighth embodiment of the present invention;

FIG. 12 is a diagram of a data transmission apparatus according to a ninth embodiment of the present invention;

fig. 13 is a schematic diagram of a data transmission apparatus according to a tenth embodiment of the present invention;

fig. 14 is another schematic diagram of a data transmission apparatus according to a tenth embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 2, a data transmission method according to a first embodiment of the present invention is applied to a core network control plane function entity, and includes:

step 101, when a user plane anchor needs to be added or deleted for an activated protocol data unit PDU session, indicating an IP anchor corresponding to the PDU session to cache a downlink data packet.

In practical applications, when a UE initiates a PDU session of the same data network as an existing PDU session, it is necessary to add a user plane anchor point for the newly initiated PDU session. When a user initiates the deletion of two PDU sessions to the same data network, the user plane node needs to be deleted.

And when a user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session, the core network control plane functional entity sends a suspension message to the IP anchor point. Wherein, the suspension message is used for indicating the IP anchor point to cache the downlink data packet. After receiving the corresponding suspension message, the IP anchor point caches the received downlink data packet.

In addition, in this step, in order to further ensure the reliability of data transmission and service, when it is necessary to add or delete a user plane anchor for an activated PDU session, the RAN may also be instructed to buffer uplink packets. Specifically, when a user plane anchor needs to be added or deleted for an activated protocol data unit PDU session, a core network control plane functional entity sends a suspension message to the RAN, where the suspension message is used to instruct the RAN to cache an uplink data packet. After receiving the corresponding suspension message, the RAN buffers the received downlink data packet.

And 102, indicating the user plane anchor point and the IP anchor point to update the user plane path.

When a user plane anchor point needs to be added for an activated PDU session, a core network control plane functional entity sends a first user plane update instruction to the user plane anchor point, where the first user plane update instruction includes: tunnel identification and IP address of the user plane anchor, tunnel identification and IP address of the RAN, tunnel identification and IP address of the IP anchor; sending a second user plane updating instruction to the IP anchor point, wherein the second user plane updating instruction comprises: and the tunnel identifier and the IP address of the user plane anchor point.

Wherein the first user plane update instruction is used for establishing a tunnel between the RAN and the user plane anchor point and establishing a tunnel between the user plane anchor point and the IP anchor point; the second user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the IP anchor and the user plane anchor.

When a user plane anchor point needs to be deleted for the activated PDU session, a core network control plane functional entity sends a fourth user plane updating instruction to the user plane anchor point; sending a fifth user plane updating instruction to the IP anchor point, wherein the fifth user plane updating instruction comprises: a tunnel identification and an IP address of the RAN.

Wherein, the fourth user plane update instruction is used for instructing the user plane anchor point to delete the information related to the PDU session; and the fifth user plane updating instruction is used for updating the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the IP anchor point and the RAN.

Step 103, instruct RAN to update user plane path.

When a user plane anchor point needs to be added for the activated PDU session, a core network control plane functional entity sends a third user plane update instruction to the RAN, where the third user plane update instruction includes: and the tunnel identifier and the IP address of the user plane anchor point. Wherein the third user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the RAN and the user plane anchor.

When a user plane anchor point needs to be deleted for the activated PDU session, a core network control plane functional entity sends a sixth user plane update instruction to the RAN, where the sixth user plane update instruction includes: and the tunnel identifier and the IP address of the IP anchor point. Wherein the sixth user plane update instruction is configured to update the tunnel between the RAN and the user plane anchor to the tunnel between the RAN and the IP anchor.

And 104, indicating the IP anchor point to send a downlink data packet through the updated user plane path.

And after the RAN finishes updating the user plane path, directly recovering the transmission of the uplink data packet, and transmitting a user plane updating response message to the core network control plane entity. At this time, the core network control plane functional entity sends a release message to the IP anchor according to the user plane update response message, and instructs the IP anchor to resume sending downlink data packets.

In the above embodiment, the execution of step 102 and step 103 does not have a strict precedence relationship, that is, in other embodiments, step 103 may be executed first and then step 102 may be executed.

It can be seen from the above that, in the embodiment of the present invention, when a user plane anchor needs to be added or deleted for an activated PDU session, the RAN and the IP anchor respectively buffer received uplink data packets and downlink data packets, and after completing the update of the user plane path, the updated user plane path is used to send the downlink data packets. Therefore, the scheme of the embodiment of the invention avoids the situation of packet loss or receiving end node error report in the prior art, and improves the reliability of data transmission and service.

As shown in fig. 3, a data transmission method according to the second embodiment of the present invention is applied to a RAN, and includes:

step 201, when a user plane anchor point needs to be added or deleted for an activated protocol data unit PDU session, caching an uplink data packet according to an instruction of a core network control plane functional entity.

Specifically, in this step, the RAN receives a suspension message of the core network control plane function entity, and buffers the received uplink data packet according to the suspension message.

Step 202, updating the user plane path according to the indication of the core network control plane function entity.

In this step, when a user plane anchor point needs to be added for the activated PDU session, the RAN receives a third user plane update instruction of the core network control plane function entity, and updates the tunnel with the IP anchor point to the tunnel with the user plane anchor point according to the third user plane update instruction. Wherein, the third user plane updating instruction comprises: and the tunnel identifier and the IP address of the user plane anchor point.

In this step, when a user plane anchor point needs to be deleted for the activated PDU session, the RAN receives a sixth user plane update instruction of the core network control plane function entity, and updates the tunnel with the user plane anchor point to the tunnel with the IP anchor point according to the sixth user plane update instruction. Wherein, the sixth user plane updating instruction comprises: and the tunnel identifier and the IP address of the IP anchor point corresponding to the PDU session.

In addition, after the user plane path update is completed, the RAN may further send a user plane update response message to the core network control plane functional entity, where the user plane update response message is used to trigger the core network control plane functional entity to send a release message to the IP anchor corresponding to the PDU session.

And step 203, sending the uplink data packet through the updated user plane path.

Specifically, in this step, when a user plane anchor needs to be added for an activated PDU session, an uplink data packet is sent through a tunnel between the user plane anchor and the PDU session; and when the user plane anchor point needs to be deleted for the activated PDU conversation, sending the uplink data packet through the tunnel between the IP anchor point and the uplink data packet.

As shown in fig. 4, the data transmission method according to the third embodiment of the present invention is applied to an IP anchor, and includes:

step 301, when a user plane anchor point needs to be added or deleted for an activated protocol data unit PDU session, caching a downlink data packet according to an indication of a core network control plane functional entity.

Specifically, in this step, when a user plane anchor needs to be added or deleted for an activated protocol data unit PDU session, the IP anchor receives a suspension message of the core network control plane functional entity, and buffers a received downlink data packet according to the suspension message.

And step 302, updating the user plane path according to the indication of the core network control plane functional entity.

Specifically, in this step, when a user plane anchor needs to be added for the activated PDU session, the IP anchor receives a second user plane update instruction of the core network control plane functional entity, and according to the second user plane update instruction, the tunnel with the RAN is updated to the tunnel with the user plane anchor. Wherein, the second user plane updating instruction comprises: and the tunnel identifier and the IP address of the user plane anchor point.

And when the user plane anchor point needs to be deleted for the activated PDU session, the IP anchor point receives a fifth user plane updating instruction of the core network control plane functional entity, and the tunnel between the IP anchor point and the user plane anchor point is updated into the tunnel between the IP anchor point and the RAN according to the fifth user plane updating instruction. Wherein, the fifth user plane updating instruction comprises: tunnel identification and IP address of RAN.

And step 303, sending a downlink data packet through the updated user plane path.

Specifically, in this step, the IP anchor receives a release message of the core network control plane function entity.

When a user plane anchor point needs to be added for the activated PDU session, the IP anchor point sends a downlink data packet through a tunnel between the RAN and the user plane anchor point according to the suspension release message; and when the user plane anchor point needs to be deleted for the activated PDU session, the IP anchor point sends a downlink data packet through a tunnel between the IP anchor point and the RAN according to the suspension release message.

As shown in fig. 5, the data transmission method according to the fourth embodiment of the present invention is applied to a user plane anchor point, and includes:

step 401, when a user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session, the user plane path is updated according to the indication of the core network control plane functional entity.

And when a user plane anchor point needs to be added for the activated PDU session, the user plane anchor point receives a first user plane updating instruction of the core network control plane functional entity, and establishes a tunnel with the RAN and a tunnel with the IP anchor point according to the first user plane updating instruction. Wherein, the first user plane updating instruction comprises: tunnel identification and IP address of the user plane anchor point, tunnel identification and IP address of RAN, tunnel identification and IP address of the IP anchor point. In addition, the user plane anchor transmits uplink and downlink data packets through a tunnel with the RAN.

When the user plane anchor point needs to be deleted for the activated PDU session, the user plane anchor point receives a fourth user plane updating instruction of the core network control plane functional entity; and deleting the information related to the PDU conversation according to the fourth user plane updating instruction.

In the fifth embodiment of the present invention, after the UE establishes a first PDU session to a certain data network, the UE initiates a second PDU session to the same data network and needs to aggregate two PDU sessions to a user plane anchor point.

For the first PDU session that has been established, the specific procedure for establishing the first PDU session is not limited in the embodiment of the present invention. One possible implementation is a process as shown in fig. 6.

As shown in fig. 6, the process of establishing the first PDU session includes:

step 501, the UE sends a session establishment request to the core network control plane functional entity SM via the radio access network RAN.

Step 502, verifying the context of the UE by the core network control plane functional entity SM and the user plane data functional entity.

Step 503, the core network control plane function entity SM and the policy control entity apply the policies of the operator, and the like.

The core network control plane functional entity SM is responsible for the selection of the user plane anchor point and the allocation of the address identifier.

And step 504, after the above processes are completed, the core network control plane functional entity SM selects the user plane anchor point.

It is assumed here that the SM has selected UPGW1 as the user plane anchor.

Step 505, the core network control plane function entity requests the RAN to allocate resources for the session. The RAN returns the IP address and tunnel identification of the RAN for downlink transmission to the SM: IP address _ RAN and tunnel identification _ RAN.

Step 506, the SM configures the user plane information of the core network. The SM sends the uplink and downlink ipaddresses of the user plane tunnel and the tunnel identity to the UPGW 1. The downlink IP address and the tunnel identifier are IP address _ RAN and tunnel identifier _ RAN, and the uplink IP address and the tunnel identifier are IP addresses and tunnel identifiers allocated by SM to UPGW 1: IP address _ UPGW1 and tunnel id _ UPGW 1.

Step 507, the SM returns the IP address and the tunnel identifier for uplink transmission to the RAN, that is, IP address _ UPGW1 and tunnel identifier _ UPGW1 that are allocated to the UPGW by the SM.

When the UE initiates the establishment procedure of the second PDU session to the same data network, the network needs to aggregate the two PDU sessions to one user plane anchor point, so the network needs to initiate the modification procedure of the user plane path.

As shown in fig. 7, a data transmission method according to a fifth embodiment of the present invention includes:

step 601, the SM receives a new PDU session request to the data network initiated by the UE. The SM initiates a suspend message to the IP anchor UPGW 1. Upon receiving the suspend message, the UPGW1 will buffer the downstream packets and stop sending downstream packets to the RAN.

Step 602, the SM sends a suspend message to the RAN. Upon receipt of this suspend message, the RAN buffers the upstream packet and stops sending the upstream packet to the UPGW 1.

Step 601 and step 602 may be executed simultaneously, and there is no strict precedence relationship.

Step 603, the SM initiates a user plane update procedure to the UPGW 2.

Specifically, the SM sends a first user plane update instruction to the UPGW2, where the first user plane update instruction includes: tunnel identification and IP address of UPGW2, tunnel identification and IP address of the RAN, tunnel identification and IP address of UPGW 1.

Wherein the first user plane update instruction is to establish a tunnel between the RAN and the UPGW2 and to establish a tunnel between the UPGW2 and the UPGW 1.

Step 604, the SM initiates a user plane update procedure to the UPGW 1.

Specifically, the SM sends a second user plane update instruction to the IP anchor, where the second user plane update instruction includes: tunnel identification and IP address of UPGW 2.

Wherein the second user plane update instruction is configured to update the tunnel between the UPGW1 and the RAN to the tunnel between the UPGW1 and the UPGW 2.

Step 603 and step 604 may be executed simultaneously, and there is no strict sequence relationship.

Step 605, the SM initiates a user plane update procedure to the RAN.

Specifically, the SM sends a third user plane update instruction to the RAN, where the third user plane update instruction includes: tunnel identification and IP address of the UPGW 2. Wherein the third user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the RAN and the UPGW 2.

In the process of the above steps 603, 604, 605, when the corresponding user plane update process is completed, the UPGW2, the UPGW1, and the RAN may all send a user plane update response message to the SM.

Step 606, the RAN completes the operation of suspension release, and sends the uplink data packet through the tunnel with the UPGW 2. That is, the RAN transmits an uplink packet to the UPGW2, and the UPGW2 transmits the uplink packet to the UPGW1 and the UPGW1 to the outside.

Step 607, SM instructs the UPGW1 to perform the un-suspend operation.

Specifically, the SM sends a suspension release message to the UPGW1 according to a user plane update response message of the RAN, and triggers the UPGW1 to send a downlink data packet through a tunnel between the RAN and the UPGW 2.

Step 608, the UPGW1 resumes sending the downlink data packets.

In this process, the UPGW1 sends a downlink packet through a tunnel between the RAN and the UPGW2, that is, the UPGW1 sends the downlink packet to the UPGW2, and the UPGW2 sends the packet to the RAN.

In the above procedure, the SM needs to configure the paths of the UPGW1 and the UPGW2 and the user plane path of the RAN.

Before the path update, the tunnel identifiers stored by RAN and UPGW1 are:

RAN: IP address _ RAN and tunnel identifier _ RAN; IP address _ UPGW1, tunnel id _ UPGW 1;

UPGW 1: IP address _ UPGW1, tunnel id _ UPGW 1; IP address _ RAN and tunnel identifier _ RAN;

after the path is updated, the tunnel identifiers stored by each node are respectively:

RAN: IP address _ RAN and tunnel identifier _ RAN; IP address _ UPGW2, tunnel id _ UPGW 2;

UP GW 1: IP address _ UPGW1, tunnel id _ UPGW 1; IP address _ UPGW2, tunnel id _ UPGW 2;

UPGW 2: a first set of identifications: IP address _ UPGW2, tunnel id _ UPGW 2; IP address _ RAN and tunnel identifier _ RAN; a second group of identifications: IP address _ UPGW2, tunnel id _ UPGW 2; IP address _ UPGW1, tunnel id _ UPGW 1.

Wherein the first group of identities maintained by the UGW2 is used for tunneling between the RAN and the UPGW2, and the second group of identities is used for data transmission between the UPGW2 and the UPGW 1.

Meanwhile, in the above process, the SM is required to update the data paths of the RAN, the UPGW1 and the UPGW2, and the user plane anchors cannot communicate directly with each other, that is, there is no signaling interaction function between the RAN, the UPGW1 and the UPGW2, and the adjustment is performed only by the core network control plane SM.

It can be seen from the above that, in the embodiment of the present invention, when a session needs to be added for an activated protocol data unit PDU, the RAN and the IP anchor respectively buffer the received uplink data packet and downlink data packet, and after the user plane path is updated, the updated user plane path is used to send the downlink data packet. Therefore, the scheme of the embodiment of the invention avoids the situation of packet loss or receiving end node error report in the prior art, and improves the reliability of data transmission and service.

In the sixth embodiment of the present invention, it is assumed that data transmission channels of a PDU session are RAN, UGW2, and UGW1, UPGW1 is an IP anchor, and UPGW2 is a user plane anchor. Assuming that the UE deactivates one PDU session, the network needs to renew the path for another PDU session that remains active, i.e., the UPGW2 is removed from the data transmission path, and the data path is RAN to UPGW1 after the path switch.

As shown in fig. 8, a data transmission method according to a sixth embodiment of the present invention includes:

step 701, the SM determines to initiate a path switching process for the PDU session in the active state. The SM initiates a suspend message to the IP anchor UPGW 1. Upon receiving the suspend message, the UPGW1 will buffer the downstream packets and stop sending downstream packets to the RAN.

Step 702, the SM sends a suspend message to the RAN. Upon receipt of this suspend message, the RAN buffers the upstream packet and stops sending the upstream packet to the UPGW 1.

Step 701 and step 702 may be executed simultaneously, and there is no strict precedence relationship.

Step 703, the SM initiates a user plane update procedure to the UPGW 2.

Specifically, the SM sends a fourth user plane update command to the UPGW2, instructing the UPGW2 to delete the information related to the PDU session.

Step 704, the SM initiates a user plane update procedure to the UPGW 1.

Specifically, the SM sends a fifth user plane update command to the IP anchor, where the fifth user plane update command includes: a tunnel identification and an IP address of the RAN.

Wherein the fifth user plane update instruction is configured to update the tunnel between the UPGW1 and the UPGW2 to the tunnel between the UPGW1 and the RAN.

Step 703 and step 704 may be executed simultaneously, and there is no strict sequence relationship.

Step 705, the SM initiates a user plane update procedure to the RAN.

Specifically, the SM sends a sixth user plane update instruction to the RAN, where the sixth user plane update instruction includes: tunnel identification and IP address of the UPGW 1. Wherein the sixth user plane update instruction is to update a tunnel between the RAN and the UPGW2 to a tunnel between the RAN and the UPGW 1.

In the processes of the above steps 703, 704, and 705, when the corresponding user plane update process is completed, the UPGW2, the UPGW1, and the RAN may all send a user plane update response message to the SM.

Step 706, the RAN completes the operation of suspending, and sends the uplink data packet through the tunnel with the UPGW 1. That is, the RAN transmits the uplink packet to the UPGW1, and the UPGW1 transmits the uplink packet to the outside.

Step 707, SM instructs the UPGW1 to perform an operation of de-suspending.

Specifically, the SM sends a suspension release message to the UPGW1 according to a user plane update response message of the RAN, and triggers the UPGW1 to send a downlink data packet through a tunnel with the RAN.

Step 708, the UPGW1 resumes sending the downstream packet.

In this process, the UPGW1 transmits downlink packets through a tunnel with the RAN, i.e., the UPGW1 transmits downlink packets to the RAN.

It can be seen from the above that, in the embodiment of the present invention, when a user plane anchor needs to be deleted for an activated PDU session, the RAN and the IP anchor respectively buffer received uplink data packets and downlink data packets, and after completing the update of the user plane path, the updated user plane path is used to send the downlink data packets. Therefore, the scheme of the embodiment of the invention avoids the situation of packet loss or receiving end node error report in the prior art, and improves the reliability of data transmission and service.

As shown in fig. 9, a data transmission apparatus according to a seventh embodiment of the present invention includes:

a first indicating module 801, configured to indicate, when a user plane anchor needs to be added or deleted for an activated protocol data unit PDU session, an IP anchor corresponding to the PDU session to cache a downlink data packet; a first path update indicating module 802, configured to indicate the user plane anchor point and the IP anchor point to perform user plane path update; a second path update instructing module 803, configured to instruct the RAN to perform user plane path update; a second indicating module 804, configured to instruct the IP anchor to send a downlink data packet through the updated user plane path.

In order to further ensure the reliability of data transmission and service, the first indication module 801 is further configured to indicate, when a user plane anchor needs to be added or deleted for an activated PDU session, the RAN to cache an uplink data packet.

Wherein the first indication module 801 comprises: a first suspend message sending sub-module, configured to send a suspend message to the RAN, where the suspend message is used to instruct the RAN to cache an uplink data packet; and the second hang message sending submodule is used for sending a hang message to the IP anchor point, and the hang message is used for indicating the IP anchor point to cache the downlink data packet.

Wherein the first path update indication module 802 includes:

a first user plane update instruction sending submodule, configured to send a first user plane update instruction to an activated PDU session when a user plane anchor needs to be added to the PDU session, where the first user plane update instruction includes: tunnel identification and IP address of the user plane anchor, tunnel identification and IP address of the RAN, tunnel identification and IP address of the IP anchor; a second user plane update instruction sending submodule, configured to send a second user plane update instruction to the IP anchor point when a user plane anchor point needs to be added for an activated PDU session, where the second user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point; the first user plane update instruction is used for establishing a tunnel between the RAN and the user plane anchor point and establishing a tunnel between the user plane anchor point and the IP anchor point; the second user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the IP anchor and the user plane anchor.

At this time, the second path update indication module 803 is specifically configured to: when a user plane anchor point needs to be added for the activated PDU session, sending a third user plane update instruction to the RAN, wherein the third user plane update instruction comprises: the tunnel identifier and the IP address of the user plane anchor point; the third user plane update instruction is configured to update the tunnel between the IP anchor and the RAN to the tunnel between the RAN and the user plane anchor.

Wherein the first path update indication module 802 includes: a fourth user plane updating instruction sending submodule, configured to send a fourth user plane updating instruction to the user plane anchor point when the user plane anchor point needs to be deleted for the activated PDU session; a fifth user plane update instruction sending sub-module, configured to send a fifth user plane update instruction to the IP anchor when a user plane anchor needs to be deleted for an activated PDU session, where the fifth user plane update instruction includes: a tunnel identity and an IP address of the RAN; the fourth user plane updating instruction is used for indicating the user plane anchor point to delete the information related to the PDU session; and the fifth user plane updating instruction is used for updating the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the IP anchor point and the RAN.

At this time, the second path update indication module 803 is specifically configured to: when the user plane anchor point needs to be deleted for the activated PDU session, a sixth user plane update instruction is sent to the RAN, and the sixth user plane update instruction comprises: the tunnel identifier and the IP address of the IP anchor point; the sixth user plane update instruction is configured to update the tunnel between the RAN and the user plane anchor to the tunnel between the RAN and the IP anchor.

Wherein the second indicating module 804 comprises: a receiving submodule, configured to receive a user plane update response message sent by the RAN; the sending submodule is used for sending a suspension releasing message to the IP anchor point according to the user plane updating response message; when a user plane anchor point needs to be added for the activated PDU session, the suspension release message is used for triggering the IP anchor point to send a downlink data packet through a tunnel between the RAN and the user plane anchor point; when a user plane anchor point needs to be deleted for the activated PDU session, the suspension release message is used for triggering the IP anchor point to send a downlink data packet through a tunnel between the RAN and the IP anchor point.

The working principle of the device according to the present invention may refer to the description of the foregoing method embodiment, and the device may be located in a core network control plane functional entity.

As shown in fig. 10, the data transmission apparatus according to the eighth embodiment of the present invention includes:

a caching module 901, configured to cache an uplink data packet according to an instruction of a core network control plane functional entity when a user plane anchor needs to be added or deleted for an activated protocol data unit PDU session; a path update module 902, configured to update a user plane path according to the indication of the core network control plane function entity; and a data packet sending module 903, configured to send an uplink data packet through the updated user plane path.

Wherein the cache module 901 includes: the receiving submodule is used for receiving a suspension message of the core network control plane functional entity; and the buffer submodule is used for buffering the received uplink data packet according to the suspension message.

Wherein the path updating module 902 includes: a first instruction receiving sub-module, configured to receive a third user plane update instruction of the core network control plane function entity when a user plane anchor needs to be added for an activated PDU session, where the third user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point; and the first path updating submodule is used for updating the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the IP anchor point and the user plane anchor point according to the third user plane updating instruction.

Wherein the path updating module 902 includes: a second instruction receiving sub-module, configured to receive a sixth user plane update instruction of the core network control plane function entity when a user plane anchor needs to be deleted for an activated PDU session, where the sixth user plane update instruction includes: the tunnel identification and the IP address of the IP anchor point corresponding to the PDU session; and the second path updating submodule is used for updating the tunnel between the user plane anchor point and the IP anchor point into the tunnel between the IP anchor point and the user plane anchor point according to the sixth user plane updating instruction.

The data packet sending module 903 is specifically configured to: when a user plane anchor point needs to be added for the activated PDU session, sending an uplink data packet through a tunnel between the user plane anchor point and the uplink data packet; and when the user plane anchor point needs to be deleted for the activated PDU conversation, sending the uplink data packet through the tunnel between the IP anchor point and the uplink data packet.

As shown in fig. 11, the apparatus further includes: a message sending module 904, configured to send a user plane update response message to the core network control plane function entity, where the user plane update response message is used to trigger the core network control plane function entity to send a suspension release message to the IP anchor corresponding to the PDU session.

The working principle of the device of the present invention can refer to the description of the foregoing method embodiment, and the device can be located in the RAN.

As shown in fig. 12, a data transmission apparatus according to a ninth embodiment of the present invention includes:

a caching module 1001, configured to cache a downlink data packet according to an instruction of a core network control plane functional entity when a user plane anchor needs to be added or deleted for an activated protocol data unit PDU session; a path update module 1002, configured to update a user plane path according to the indication of the core network control plane function entity; a data packet sending module 1003, configured to send a downlink data packet through the updated user plane path.

The cache module 1001 includes: the receiving submodule is used for receiving a suspension message of the core network control plane functional entity; and the buffer submodule is used for buffering the received downlink data packet according to the suspension message.

Wherein the path updating module 1002 comprises: a first instruction receiving sub-module, configured to receive a second user plane update instruction of the core network control plane function entity when a user plane anchor point needs to be added for an activated PDU session, where the second user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point; and the first path updating submodule is used for updating the tunnel between the RAN and the user plane anchor point into the tunnel between the RAN and the user plane anchor point according to the second user plane updating instruction.

Wherein the path updating module 1002 comprises: a second instruction receiving sub-module, configured to receive a fifth user plane update instruction of the core network control plane functional entity when a user plane anchor needs to be deleted for an activated PDU session, where the fifth user plane update instruction includes: a tunnel identity and an IP address of the RAN; and the second path updating submodule is used for updating the tunnel between the user plane anchor point and the RAN into the tunnel between the RAN and the second path anchor point according to the fifth user plane updating instruction.

The data packet sending module 1003 includes:

The working principle of the device of the present invention can refer to the description of the foregoing method embodiments, and the device can be located in the UPGW.

As shown in fig. 13, a data transmission apparatus according to a tenth embodiment of the present invention includes:

a path update module 1101, configured to update a user plane path according to an instruction of the core network control plane function entity when a user plane anchor needs to be added or deleted for an activated PDU session.

Wherein the path updating module 1101 includes:

a first instruction receiving sub-module, configured to receive a first user plane update instruction of the core network control plane function entity when a user plane anchor needs to be added for an activated PDU session, where the first user plane update instruction includes: the tunnel identifier and the IP address of the user plane anchor point, the tunnel identifier and the IP address of the RAN and the tunnel identifier and the IP address of the IP anchor point; and the first path updating submodule is used for establishing a tunnel with the RAN and establishing a tunnel with the IP anchor point according to the first user plane updating instruction.

Wherein the path updating module 1101 includes: a second instruction receiving sub-module, configured to receive a fourth user plane update instruction of the core network control plane functional entity when a user plane anchor needs to be deleted for an activated PDU session; and the second path updating submodule is used for deleting the information related to the PDU session according to the fourth user plane updating instruction.

As shown in fig. 14, the apparatus further includes: a packet sending module 1102, configured to transmit an uplink packet and a downlink packet through a tunnel with the RAN when a user plane anchor needs to be added for an activated PDU session.

An eleventh embodiment of the present invention provides a data processing apparatus including: a processor; and a memory connected to the processor through a bus interface, the memory being used to store programs and data used by the processor in performing operations, and when the processor calls and executes the programs and data stored in the memory, the memory including functional modules or units implementing:

a second path update indication module, configured to indicate the RAN to perform user plane path update;

An embodiment twelfth of the present invention provides a data processing apparatus, including: a processor; and a memory connected to the processor through a bus interface, the memory being used to store programs and data used by the processor in performing operations, and when the processor calls and executes the programs and data stored in the memory, the memory including functional modules or units implementing:

An embodiment thirteenth of the present invention provides a data processing apparatus, including: a processor; and a memory connected to the processor through a bus interface, the memory being used to store programs and data used by the processor in performing operations, and when the processor calls and executes the programs and data stored in the memory, the memory including functional modules or units implementing:

An embodiment fourteen of the present invention provides a data processing apparatus, including: a processor; and a memory connected to the processor through a bus interface, the memory being used to store programs and data used by the processor in performing operations, and when the processor calls and executes the programs and data stored in the memory, the memory including functional modules or units implementing:

It should be noted that the apparatus provided in the eleventh, twelfth, thirteenth and fourteenth embodiments of the present invention is an apparatus capable of correspondingly implementing the data transmission method provided in the foregoing method embodiment, so that all embodiments of the data transmission method provided in the foregoing method embodiment can be correspondingly applied to the eleventh, twelfth, thirteenth and fourteenth embodiments, and can achieve the same or similar beneficial effects.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus 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.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. 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.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method of data transmission, comprising:

instructing a Radio Access Network (RAN) to update a user plane path;

instructing the IP anchor point to send a downlink data packet through the updated user plane path;

wherein, when a user plane anchor point needs to be added for the activated PDU session, the user plane anchor point and the IP anchor point user plane path updating comprises:

establishing a tunnel between the RAN and the user plane anchor point, establishing a tunnel between the user plane anchor point and the IP anchor point, and updating the tunnel between the IP anchor point and the RAN into the tunnel between the IP anchor point and the user plane anchor point;

when a user plane anchor point needs to be deleted for the activated PDU session, the updating of the user plane path between the user plane anchor point and the IP anchor point comprises the following steps:

the user plane anchor point deletes the information related to the PDU conversation and updates the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the IP anchor point and the RAN;

when a user plane anchor point needs to be added for the activated PDU session, the indicating the user plane anchor point and the IP anchor point to update the user plane path comprises:

2. The method of claim 1, wherein when a user plane anchor needs to be added or deleted for an activated Protocol Data Unit (PDU) session, the method further comprises:

instructing the RAN to cache an uplink data packet;

the instructing the RAN to cache the uplink data packet includes:

3. The method of claim 1, wherein instructing a Radio Access Network (RAN) to perform a user plane path update when a user plane anchor needs to be added for an activated PDU session comprises:

4. The method of claim 1, wherein when a user plane anchor needs to be deleted for an activated PDU session, the instructing the user plane anchor and the IP anchor to perform a user plane path update comprises:

5. The method of claim 1, wherein instructing the radio access network RAN to perform a user plane path update when a user plane anchor needs to be deleted for an activated PDU session comprises:

sending a sixth user plane update instruction to the RAN, where the sixth user plane update instruction includes: the tunnel identifier and the IP address of the IP anchor point;

6. The method of claim 1, wherein the instructing the IP anchor to send downlink packets via the updated user plane path comprises:

receiving a user plane update response message sent by the RAN;

7. A method of data transmission, comprising:

sending an uplink data packet through the updated user plane path;

when a user plane anchor point needs to be added for an activated PDU session, updating a user plane path includes:

updating the tunnel between the IP anchor point and the user plane anchor point into the tunnel between the user plane anchor point and the IP anchor point;

when the user plane anchor point needs to be deleted for the activated PDU conversation, the user plane path updating is carried out, which comprises the following steps:

updating the tunnel between the user plane anchor point and the IP anchor point into a tunnel between the IP anchor point and the user plane anchor point;

when a user plane anchor point needs to be added for the activated PDU session, the updating the user plane path according to the indication of the core network control plane function entity includes:

8. The method according to claim 7, wherein said buffering the uplink data packet according to an indication of a core network control plane function entity comprises:

9. The method according to claim 7, wherein when it is required to delete a user plane anchor for an activated PDU session, said performing a user plane path update according to the indication of the core network control plane function entity comprises:

10. The method according to any one of claims 7 to 9,

when a user plane anchor point needs to be added for the activated PDU session, the sending of the uplink data packet through the updated user plane path includes: sending an uplink data packet through a tunnel between the user plane anchor point and the user plane anchor point;

11. The method according to any of claims 7-9, wherein after said updating the user plane path according to the indication of the core network control plane function entity, the method further comprises:

12. A method of data transmission, comprising:

sending a downlink data packet through the updated user plane path;

updating the tunnel between the RAN and the user plane anchor point;

updating the tunnel with the user plane anchor point to the tunnel with the RAN;

13. The method according to claim 12, wherein said buffering the downlink data packet according to an indication of a core network control plane function entity comprises:

14. The method according to claim 12, wherein when it is required to delete a user plane anchor for an activated PDU session, said performing a user plane path update according to the indication of the core network control plane function entity comprises:

15. The method according to any of claims 12-14, wherein said sending the downlink data packet via the updated user plane path comprises:

16. A method of data transmission, comprising:

when a user plane anchor point needs to be added or deleted for the activated protocol data unit PDU session, updating a user plane path according to the indication of a core network control plane functional entity;

when a user plane anchor point needs to be added for an activated PDU session, updating a user plane path includes: establishing a tunnel with the RAN and establishing a tunnel with the IP anchor point;

when the user plane anchor point needs to be deleted for the activated PDU conversation, the user plane path updating is carried out, which comprises the following steps: deleting information related to the PDU session;

17. The method according to claim 16, wherein when it is required to delete the user plane anchor for the activated PDU session, said performing the user plane path update according to the indication of the core network control plane function entity comprises:

18. The method according to any of claims 16-17, wherein when it is required to add a user plane anchor point for an activated PDU session, the method further comprises:

19. A data transmission apparatus, comprising:

a second indicating module, configured to indicate the IP anchor to send a downlink data packet through the updated user plane path;

the first path update indication module includes:

20. The apparatus of claim 19, wherein the first indicating module is further configured to instruct the RAN to buffer uplink packets when a user plane anchor needs to be added or deleted for an activated PDU session;

the first indication module comprises:

21. The apparatus of claim 19, wherein the second path update indication module is specifically configured to: when a user plane anchor point needs to be added for the activated PDU session, sending a third user plane update instruction to the RAN, wherein the third user plane update instruction comprises: the tunnel identifier and the IP address of the user plane anchor point;

22. The apparatus of claim 19, wherein the first path update indication module comprises:

23. The apparatus of claim 19, wherein the second path update indication module is specifically configured to: when the user plane anchor point needs to be deleted for the activated PDU session, a sixth user plane update instruction is sent to the RAN, and the sixth user plane update instruction comprises: the tunnel identifier and the IP address of the IP anchor point;

24. The apparatus of claim 19, wherein the second indication module comprises:

25. A data transmission apparatus, comprising:

the data packet sending module is used for sending the uplink data packet through the updated user plane path;

the path update module includes:

26. The apparatus of claim 25, wherein the cache module comprises:

27. The apparatus of claim 25, wherein the path update module comprises:

28. The apparatus according to any of claims 25-27, wherein the packet sending module is specifically configured to: when a user plane anchor point needs to be added for the activated PDU session, sending an uplink data packet through a tunnel between the user plane anchor point and the uplink data packet; and when the user plane anchor point needs to be deleted for the activated PDU conversation, sending the uplink data packet through the tunnel between the IP anchor point and the uplink data packet.

29. The apparatus of any one of claims 25-27, further comprising:

30. A data transmission apparatus, comprising:

a data packet sending module, configured to send a downlink data packet through the updated user plane path;

updating the tunnel between the RAN and the user plane anchor point;

the path update module includes:

31. The apparatus of claim 30, wherein the cache module comprises:

32. The apparatus of claim 30, wherein the path update module comprises:

33. The apparatus according to any of claims 30-32, wherein said packet sending module comprises:

34. A data transmission apparatus, comprising:

a path updating module, configured to update a user plane path according to an instruction of a core network control plane functional entity when a user plane anchor point needs to be added or deleted for an activated protocol data unit PDU session;

the path update module includes:

35. The apparatus of claim 34, wherein the path update module comprises:

36. The apparatus of any one of claims 34-35, further comprising: