US 10,952,105 B2Granted

Communication method, source base station, target base station, core network device, and terminal device

AssigneeHuawei Technologies Co., Ltd.

InventorsYinghao Jin, Henrik Olofsson, Feng Han, Wei Tan

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Abstract

Embodiments of the present invention disclose a communication method, a source base station, a target base station, a core network device, and a terminal device, where the method includes: sending, by a source base station, a handover request to a target base station, where the handover request is used to request to hand over a session of a terminal device from the source base station to the target base station, and the handover request includes an identifier of a session requested to be handed over and indication information of a network slice corresponding to the session; and receiving, by the source base station, a handover response message from the target base station.

Claims24

Dependent claims

A method for handover in a wireless communication system, comprising:

sending, by a source access network device, a handover request message to a target access network device, wherein the handover request message comprises an identifier of a session requested to be handed over from the source access network device to the target access network device and indication information of a network slice corresponding to the session requested to be handed over;
sending, by the target access network device, a path switch request message to a core network device, wherein the path switch request message comprises an identifier of a first session, an identifier of a second session and a cause information indicating a reason of rejection of the second session, and wherein the first session is accepted by the target access network device, and the second session is rejected by the target access network device, and wherein the reason of rejection of the second session comprises that the target access network device does not support a network slice corresponding to the second session, or that a resource is not available for a network slice corresponding to the second session;
determining, by the core network device, the reason of rejection of the second session based on the cause information;
releasing, by the core network device, the second session after determining that the reason of rejection of the second session is because the target access network device does not support the network slice corresponding to the second session, or deactivating, by the core network device, the second session after determining that the reason of rejection of the second session is because the resource is not available for the network slice corresponding to the second session;
and
sending, by the core network device, a path switch request response message to the target access network device.

3 more elements

A wireless communication system for handover, comprising:

a source access network device, a target access network device and a core network device;
the source access network device is configured to send a handover request message to a target access network device, wherein the handover request message comprises an identifier of a session requested to be handed over from the source access network device to the target access network device and indication information of a network slice corresponding to the session requested to be handed over;
and
the target access network device is configured to send a path switch request message to the core network device, wherein the path switch request message comprises an identifier of a first session, an identifier of a second session and a cause information indicating a reason of rejection of the second session, and wherein the first session is accepted by the target access network device, and the second session is rejected by the target access network device, and wherein the reason of rejection of the second session comprises that the target access network device does not support a network slice corresponding to the second session, or that a resource is not available for a network slice corresponding to the second session;
and
the core network device is configured to:
determine the reason of rejection of the second session based on the cause information;
release the second session after determining that the reason of rejection of the second session is because the target access network device does not support the network slice corresponding to the second session, or deactivate the second session after determining that the reason of rejection of the second session is because the resource is not available for the network slice corresponding to the second session;
and
send a path switch request response message to the target access network device.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/443,304Filed 17 Jun 2019 · continuation
Priority: CN 201710686415.211 Aug 2017
Published: US 2019/0306761 A13 Oct 2019
Granted: 16 Mar 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 36/0033
For data sessions of end-to-end connection: with transfer of context information
H04W 76/30
Connection management: connection release
H04W 8/08
Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of…:…
H04W 36/0011
Control or signalling for completing the hand-off: for data sessions of end-to-end connection