US 11,057,813 B2Granted

Method and apparatus for transmitting downlink data

AssigneeChina Academy of Telecommunications Technology

InventorsShanzhi Chen, Hucheng Wang, Ming Ai

Life of this patent

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Abstract

The present application discloses a method and an apparatus for transmitting downlink data, to resolve the issue of erroneous transmission of downlink data of UE when the UE moves from an EPS network to a 5G network. The method comprises: after receiving a request message for updating a session management context of the UE, a session management function entity in embodiments of the present application determining that the UE has moved from a first network to a second network; the session management function entity notifying a user plane function entity to delete a user plane connection of the UE in the first network, and creating a user plane connection of the UE in the second network, such that the user plane function entity transmits downlink data of the UE through the newly created user plane connection.

Claims12

Dependent claims

A method for transmitting downlink data, comprising:

determining, by a session management function entity, that a User Equipment, UE, moves from a first network to a second network after receiving a request message for updating session management context of the UE;
notifying, by the session management function entity, a user plane function entity to delete a user plane connection of the UE in the first network and create a user plane connection of the UE in the second network, so that the user plane function entity transmits downlink data of the UE through the user plane connection created in the second network;
and
determining, by the session management function entity, that a tunnel type used by the user plane connection in the second network is different from a tunnel type used by the user plane connection in the first network after the session management function entity determines that the UE moves from the first network to the second network and before the session management function entity notifies the user plane function entity to delete the user plane connection of the UE in the first network and create the user plane connection of the UE in the second network.

1 more element

A session management function entity, comprising a processor and a memory;

wherein the processor is configured to read a program in the memory to:
determine that a User Equipment, UE, moves from a first network to a second network after receiving a request message for updating session management context of the UE;
notify a user plane function entity to delete a user plane connection of the UE in the first network and notify the user plane function entity to create a user plane connection of the UE in the second network, so that the user plane function entity transmits downlink data of the UE through the user plane connection created in the second network;
and
determine that a tunnel type used by the user plane connection in the second network is different from a tunnel type used by the user plane connection in the first network after determining that the UE moves from the first network to the second network and before notifying the user plane function entity to delete the user plane connection of the UE in the first network and notifying the user plane function entity to create the user plane connection of the UE in the second network.

2 more elements

A non-transitory computer storage medium, storing a computer program thereon, wherein the computer program is executed by a processor to:

determine that a User Equipment, UE, moves from a first network to a second network after receiving a request message for updating session management context of the UE;
notify a user plane function entity to delete a user plane connection of the UE in the first network and notify the user plane function entity to create a user plane connection of the UE in the second network, so that the user plane function entity transmits downlink data of the UE through the user plane connection created in the second network;
and
determine that a tunnel type used by the user plane connection in the second network is different from a tunnel type used by the user plane connection in the first network after determining that the UE moves from the first network to the second network and before notifying the user plane function entity to delete the user plane connection of the UE in the first network and notifying the user plane function entity to create the user plane connection of the UE in the second network.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/960,779Filed 26 Nov 2018
Priority: CN 201810016087.X8 Jan 2018
Published: US 2020/0344656 A129 Oct 2020
Granted: 6 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04W 76/12
Connection setup: setup of transport tunnels
H04W 8/06
Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of…:…
H04W 36/0022
For data sessions of end-to-end connection: for transferring data sessions between adjacent core network technologies
H04W 36/0033
For data sessions of end-to-end connection: with transfer of context information