US 11,240,721 B2Granted

Voice switching method and apparatus

AssigneeHuawei Technologies Co., Ltd.

InventorShunli Zheng

Life of this patent

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Abstract

Embodiments disclose a voice switching method and apparatus. The method includes: receiving a voice switching request that is sent by a source mobility management entity (MME) and that carries a first communications network currently used by a to-be-switched terminal, a terminal identifier of the terminal, and a target base station identifier; if the first communications network is a preset communications network, sending, to an Internet Protocol multimedia subsystem (IMS), a query request that is used to query whether the terminal currently has a voice switching capability from the first communications network to a locally used second communications network, where the query request carries the terminal identifier; and performing voice switching processing according to the target base station identifier and the terminal identifier if a notification message that is sent by the IMS and that indicates that the terminal has the voice switching capability is received.

Claims26

Dependent claims

A voice switching method, wherein the method comprises:

receiving, by a mobile switch center (MSC) server, a voice switching request of a terminal from a first communication network to a second communication network from a mobility management entity (MME), wherein the voice switching request carries a terminal identifier of the terminal and a target base station identifier;
sending, by the MSC server, a query request to an Internet Protocol multimedia subsystem (IMS), wherein the query request is used to query whether switching from the first communications network to the second communications network in a current call state of the terminal is supported;
sending, by the IMS, a notification message to the MSC server, wherein the notification message indicating whether switching from the first communication network to the second communication network in the current call state of the terminal is supported;
and
performing, by the MSC server, voice switching processing according to the target base station identifier and the terminal identifier in response to determining that the notification message indicates that switching from the first communication network to the second communication network in the current call state of the terminal is supported, or sending, by the MSC server, a switching failure notification message to the MME in response to determining that the notification message indicates that switching from the first communication network to the second communication network in the current call state of the terminal is not supported.

2 more elements

A communication system, comprising:

a mobile switch center (MSC) server;
and
an Internet Protocol multimedia subsystem (IMS);
wherein the MSC server is configured to:
receive, from a mobility management entity (MME), a voice switching request of a terminal from a first communication network to a second communication network, wherein the voice switching request carries a terminal identifier of the terminal and a target base station identifier;
and
send a query request to the IMS, wherein the query request is used to query whether switching from the first communications network to the second communications network in a current call state of the terminal is supported;
wherein the IMS is configured to send a notification message to the MSC server, wherein the notification message indicates whether switching from the first communication network to the second communication network in the current call state of the terminal is supported;
and
wherein the MSC server is configured to:
perform voice switching processing according to the target base station identifier and the terminal identifier in response to determining that the notification message indicates that switching from the first communication network to the second communication network in the current call state of the terminal is supported;
or
send a switching failure notification message to the MME in response to determining that the notification message indicates that switching from the first communication network to the second communication network in the current call state of the terminal is not supported.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/688,643Filed 19 Nov 2019 · continuation
Priority: CN 201410745218.X8 Dec 2014
Published: US 2020/0092781 A119 Mar 2020
Granted: 1 Feb 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04L 65/1016
Architectures or entities: iP multimedia subsystem [IMS]
H04W 36/00226
Between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]: wherein the core network…
H04W 36/0072
Transmission or use of information for re-establishing the radio link: of resource information of target access point
H04W 36/144
Reselecting a network or an air interface: over a different radio air interface technology

Family

PCT/CN2015/096560Parent of this continuation · filed 7 Dec 2015
Application15/616,691Parent of this continuation · filed 7 Jun 2017
US 2020/0092781 A1Pre-grant publication · published 19 Mar 2020
US 10,506,485 B2Parent of this continuation
US 2017/0272994 A1Published application
US 11,240,721 B2This patent

From the US filing history. Foreign family members aren’t listed.