US 11,696,191 B2Granted

Method and device to implement data transmission between a source base station and a target base station in a re-establishment procedure between a terminal device and the target base station

AssigneeHuawei Technologies Co., Ltd.

InventorsTingting Geng, Hongping Zhang, Le Yan, Yinghao Jin

Life of this patent

Estimating the term…

Loading patent…

Abstract

Embodiments of this application provide a data transmission method and device. The method includes: obtaining, by a first access network device, a first message from a second access network device, where the first message requests context information of a terminal device; and sending, by the first access network device, a data packet to the second access network device. The first access network device is a corresponding access network device of the terminal device before the re-establishment procedure, and the second access network device is a corresponding access network device when the terminal device initiates the re-establishment procedure.

Claims18

Dependent claims

A method, comprising:

sending, by a second access network device, a first message to a first access network device, wherein the first message requests context information of a terminal device, and the first access network device is an access network device of the terminal device before the terminal device performs a re-establishment procedure to use the second access network device as the access network device of the terminal device;
sending, by the first access network device, a first response message to the second access network device, wherein the first response message comprises the context information of the terminal device;
sending, by the second access network device, protocol data unit (PDU) service receiving information to the first access network device, wherein the PDU service receiving information comprises identifier information of a first PDU session accepted by the second access network device or identifier information of a second PDU session rejected by the second access network device, and the first PDU session and the second PDU session are PDU sessions of the terminal device established at the first access network device before the terminal device performs the re-establishment procedure;
and
sending, by the first access network device, a data packet to the second access network device based on the PDU service receiving information.

2 more elements

A data transmission system, comprising:

a first access network apparatus;
and
a second access network apparatus, configured to:
send a first message to the first access network apparatus, wherein the first message requests context information of a terminal device, and the first access network apparatus is an access network apparatus of the terminal device before the terminal device performs a re-establishment procedure to use the second access network apparatus as the access network apparatus of the terminal device;
and
send protocol data unit (PDU) service receiving information to the first access network apparatus, wherein the PDU service receiving information comprises identifier information of a first PDU session accepted by the second access network apparatus or identifier information of a second PDU session rejected by the second access network apparatus, and the first PDU session and the second PDU session are PDU sessions of the terminal device established at the first access network apparatus before the terminal device performs the re-establishment procedure;
wherein the first access network apparatus is configured to:
send a first response message to the second access network apparatus, wherein the first response message comprises the context information of the terminal device;
and
send a data packet to the second access network apparatus based on the PDU service receiving information.

7 more elements

A method, comprising:

sending, by a second access network device, a first message to a first access network device, wherein the first message requests context information of a terminal device, and the first access network device is an access network device of the terminal device before the terminal device performs a re-establishment procedure to use the second access network device as the access network device of the terminal device;
sending, by the second access network device, protocol data unit (PDU) service receiving information to the first access network device, wherein the PDU service receiving information comprises identifier information of a first PDU session accepted by the second access network device or identifier information of a second PDU session rejected by the second access network device, and the first PDU session and the second PDU session are PDU sessions of the terminal device established at the first access network device before the terminal device performs the re-establishment procedure;
and
receiving, by the second access network device, a data packet from the first access network device based on the PDU service receiving information.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 17/171,758Filed 9 Feb 2021 · continuation
Priority: CN 201810910241.810 Aug 2018
Published: US 2021/0168669 A13 Jun 2021
Granted: 4 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04W 36/0033
For data sessions of end-to-end connection: with transfer of context information
H04W 76/19
Connection setup: connection re-establishment
H04W 36/0079
Transmission or use of information for re-establishing the radio link: in case of hand-off failure or rejection
H04W 36/305
By measured or perceived connection quality data: handover due to radio link failure