SESSION MIGRATION METHOD AND DEVICE

Title:

SESSION MIGRATION METHOD AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2018/170798

Kind Code:

A1

Abstract:

The present application relates to the technical field of communications, and provided by the embodiments thereof are a session migration method and device, which not only may ensure no packet loss of downlink data after a source user plane network element no longer continues to provide a service for a terminal device, but also may reduce the waste of core network resources and the transmission of signaling. The method comprises: a source user plane network element determines whether to continue providing a service for a terminal device; and if the source user plane network element determines not to continue providing the service for the terminal device, the source user plane network element retains the context of a first session and sends a first notification message to a control plane network element, the first notification message being used to trigger the control plane network element to send indication information to the terminal device, and the indication information being used to instruct the terminal device to trigger the establishment of a second session after waiting for data of the terminal device to be sent to be obtained, wherein the first session is an already established session between the source user plane network element and the terminal device, and the second session is a session between a target user plane network element and the terminal device.

Inventors:

ZHU FANGYUAN (CN)
LI YAN (CN)

Application Number:

PCT/CN2017/077740

Publication Date:

September 27, 2018

Filing Date:

March 22, 2017

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H04W28/08

Foreign References:

CN102892210A	2013-01-23
CN101534495A	2009-09-16
CN101500271A	2009-08-05
US20140204909A1	2014-07-24

Other References: