CN109219092B - Method, device and terminal for switching from non-3GPP access network to 3GPP access network - Google Patents
Method, device and terminal for switching from non-3GPP access network to 3GPP access network Download PDFInfo
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- CN109219092B CN109219092B CN201710524319.8A CN201710524319A CN109219092B CN 109219092 B CN109219092 B CN 109219092B CN 201710524319 A CN201710524319 A CN 201710524319A CN 109219092 B CN109219092 B CN 109219092B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
Abstract
The invention provides a method, a device and a terminal for switching from a non-3GPP access network to a 3GPP access network. The method comprises the following steps: after failure of establishing an IMS default bearer with network side equipment through a 3GPP access network, sending a request message for establishing the IMS default bearer to the network side equipment through the 3GPP access network, wherein the request type of the request message is set as switching; receiving a message which is sent by the network side equipment and refuses to establish an IMS default bearer; sending a new request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization; and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer. The invention can determine the type of the link establishment request when establishing the IMS default bearer through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a terminal for switching from a non-3GPP access network to a 3GPP access network.
Background
The EPC (Evolved Packet Core) technology enables a 3GPP access network (e.g. LTE) and a non-3GPP access network (e.g. WLAN) to operate in a common network system, and provides a seamless access service for a terminal, and a multimode terminal may enter a Core network according to the non-3GPP access network or the 3GPP access network. For example, after the terminal preferentially accesses the core network through WiFi, when the terminal leaves a WiFi coverage area or the WiFi signal quality is low, the terminal may initiate an LTE access process to implement seamless handover between a WLAN network and an LTE network, thereby ensuring continuity of a VoWiFi (Voice & Video over WiFi, WiFi network audio and Video call) service and a VoLTE (Voice & Video over LTE, LTE network audio and Video call) service.
The 3GPP protocol specifies that, when a terminal is handed over from a non-3GPP access network to a 3GPP access network, if a link established through the non-3GPP access network is not yet released, the type of a link establishment request initiated by the terminal through the 3GPP access network should be set as handover.
In the process of switching the non-3GPP access network to the 3GPP access network, if the switching fails due to network abnormality or terminal signal abnormality, the terminal may initiate a link establishment request again through the 3GPP access network, but the terminal may not know whether the non-3GPP link on the network side has been released, so that the type of the new link establishment request cannot be determined. If the non-3GPP link is released, the link establishment request of the terminal initiated switching type is rejected by the network, if the non-3GPP link still exists and the type of the link establishment request initiated by the terminal is initialized, the network establishes a new link different from the IP address of the non-3GPP link, and the terminal may have a silent conversation after the switching is successful.
Disclosure of Invention
The method, the device and the terminal for switching from the non-3GPP access network to the 3GPP access network can determine the type of the link establishment request when the IMS default bearer is established through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
In a first aspect, the present invention provides a method for switching from a non-3GPP access network to a 3GPP access network, the method comprising:
after failure of establishing an IMS default bearer with network side equipment through a 3GPP access network, sending a request message for establishing the IMS default bearer to the network side equipment through the 3GPP access network, wherein the request type of the request message is set as switching;
receiving a message which is sent by the network side equipment and refuses to establish an IMS default bearer;
sending a new request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization;
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
Optionally, after the request message for establishing the IMS default bearer is sent to the network side device through the 3GPP access network, the method further includes:
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
Optionally, the method further comprises:
after a data link is failed to be established with network side equipment through a 3GPP access network, sending an attachment request message carrying an international mobile subscriber identity to the network side equipment so that the network side equipment can inquire whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
receiving a message carrying an attach acceptance request of a first characteristic network element sent by the network side equipment, wherein the first characteristic network element marks whether the non-3GPP link at the network side still exists;
according to the first characteristic network element, sending a request message for establishing an IMS default bearer to the network side equipment;
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
Optionally, the sending, according to the first feature network element, the request message for establishing the IMS default bearer to the network side device includes:
when the first characteristic network element marks that the network side non-3GPP link exists, a request message for establishing an IMS default bearer is sent to the network side equipment through a 3GPP access network, and the request type of the request message is set as switching;
and when the first characteristic network element marks that the network side non-3GPP link does not exist, sending a request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization.
Optionally, the method further comprises:
after a data link is failed to be established between a 3GPP access network and network side equipment, a tracking area updating request message carrying an international mobile subscriber identity is sent to the network side equipment, so that the network side equipment queries whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
receiving a message which is sent by the network side equipment and carries a second characteristic network element and is used for receiving a tracking area updating request, wherein the second characteristic network element marks whether a non-3GPP link at the network side still exists;
according to the second characteristic network element, sending a request message for establishing an IMS default bearer to the network side equipment;
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
Optionally, the sending, according to the second feature network element, the request message for establishing the IMS default bearer to the network side device includes:
when the second characteristic network element marks that the network side non-3GPP link exists, a request message for establishing an IMS default bearer is sent to the network side equipment through a 3GPP access network, and the request type of the request message is set as switching;
and when the second characteristic network element marks that the network side non-3GPP link does not exist, sending a request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization.
In a second aspect, the present invention provides an apparatus for handing over from a non-3GPP access network to a 3GPP access network, the apparatus comprising:
a first sending unit, configured to send, to a network side device through a 3GPP access network, a request message for establishing an IMS default bearer after a failure to establish the IMS default bearer with the network side device through the 3GPP access network, where a request type of the request message is set to handover;
a first receiving unit, configured to receive a message sent by the network side device, where the message refuses to establish an IMS default bearer;
a second sending unit, configured to send a new request message for establishing an IMS default bearer to the network side device through a 3GPP access network, where a request type of the request message is set to be initialized;
a second receiving unit, configured to receive a message that the IMS default bearer is successfully established, where the message is sent by the network side device.
Optionally, the apparatus further comprises:
a third receiving unit, configured to receive a message that the IMS default bearer is successfully established and sent by the network side device, after the first sending unit sends the request message for establishing the IMS default bearer to the network side device through the 3GPP access network.
Optionally, the apparatus further comprises:
a third sending unit, configured to send an attach request message carrying an international mobile subscriber identity to a network-side device after a failure of establishing a data link with the network-side device through a 3GPP access network occurs, so that the network-side device queries whether a network-side non-3GPP link still exists according to the international mobile subscriber identity;
a fourth receiving unit, configured to receive a message, which is sent by the network side device and carries an attach accept request of a first feature network element, where the first feature network element marks whether the network side non-3GPP link still exists;
a fourth sending unit, configured to send, to the network side device, a request message for establishing an IMS default bearer according to the first feature network element;
a fifth receiving unit, configured to receive a message that the IMS default bearer is successfully established, where the message is sent by the network side device.
Optionally, the fourth sending unit includes:
a first sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the first feature network element indicates that the network side non-3GPP link exists, where a request type of the request message is set to be handover;
a second sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the first feature network element indicates that the network-side non-3GPP link does not exist, where a request type of the request message is set to be initialized.
Optionally, the apparatus further comprises:
a fifth sending unit, configured to send a tracking area update request message carrying an international mobile subscriber identity to a network side device after a failure of establishing a data link with the network side device through a 3GPP access network, so that the network side device queries whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
a sixth receiving unit, configured to receive a message, which is sent by the network side device and carries a second feature network element, and the second feature network element marks whether a non-3GPP link on the network side still exists;
a sixth sending unit, configured to send, to the network side device, a request message for establishing an IMS default bearer according to the second feature network element;
a seventh receiving unit, configured to receive a message that the IMS default bearer is successfully established, where the message is sent by the network side device.
Optionally, the sixth sending unit includes:
a third sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the second feature network element indicates that the network-side non-3GPP link exists, where a request type of the request message is set to be handover;
a fourth sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the second feature network element indicates that the network-side non-3GPP link does not exist, where a request type of the request message is set to be initialized.
In a third aspect, the present invention provides a terminal, where the terminal includes the above apparatus for switching from a non-3GPP access network to a 3GPP access network.
According to the method, the device and the terminal for switching from the non-3GPP access network to the 3GPP access network provided by the embodiment of the invention, if the link establishment fails when the non-3GPP access network is switched to the 3GPP access network, the link establishment is restarted and the request type is set as the switching, and when the network rejects the link establishment request, the new link establishment is restarted and the request type is set as the initialization. Compared with the prior art, the method and the device can determine the type of the link establishment request when the IMS default bearer is established through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
Drawings
FIG. 1 is a flowchart illustrating a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with an embodiment of the present invention;
FIG. 2 is a flowchart of a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with another embodiment of the present invention;
FIG. 3 is a flowchart of a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with another embodiment of the present invention;
FIG. 4 is a flowchart of a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with another embodiment of the present invention;
FIG. 5 is a flowchart of a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with another embodiment of the present invention;
FIG. 6 is a flowchart of a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with another embodiment of the present invention;
FIG. 7 is a flowchart of a method for handing over from a non-3GPP access network to a 3GPP access network in accordance with another embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an apparatus for handing over from a non-3GPP access network to a 3GPP access network according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of an apparatus for handing over from a non-3GPP access network to a 3GPP access network according to another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of an apparatus for handing over from a non-3GPP access network to a 3GPP access network according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of a fourth sending unit of the apparatus for handing over from a non-3GPP access network to a 3GPP access network according to an embodiment of the present invention;
FIG. 12 is a schematic structural diagram of an apparatus for handing over from a non-3GPP access network to a 3GPP access network according to another embodiment of the present invention;
fig. 13 is a schematic structural diagram of a sixth sending unit of a device that switches from a non-3GPP access network to a 3GPP access network according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides a method for switching from a non-3GPP access network to a 3GPP access network, as shown in fig. 1, the method includes:
s101, after failure of establishing an IMS default bearer with network side equipment through a 3GPP access network, sending a request message for establishing the IMS default bearer to the network side equipment through the 3GPP access network, wherein the request type of the request message is set as switching;
s102, receiving a message which is sent by the network side equipment and refuses to establish an IMS default bearer;
s103, sending a new request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization;
and S104, receiving a message which is sent by the network side equipment and is successful in establishing the IMS default bearer.
Optionally, if the network accepts the request message of the handover type, and thus the IMS default bearer is established, after sending the request message of establishing the IMS default bearer to the network side device through the 3GPP access network, as shown in fig. 2, the method further includes:
and S105, receiving a message which is sent by the network side equipment and is successful in establishing the IMS default bearer.
Optionally, after the IMS default bearer is successfully established through the 3GPP access network, the normal procedure of switching from the non-3GPP access network to the 3GPP access network may perform interaction with the network to release the non-3GPP link, thereby completing the handover process. However, if the IMS default bearer is established through the 3GPP access network and fails, the network does not notify the terminal whether the non-3GPP link still exists, and the terminal cannot interact with the network to release the non-3GPP link, so that when the terminal re-initiates the link establishment request, it cannot be determined whether the request type should be init (initialization) or handover (handover).
As shown in fig. 3, for the processing flow of switching from the VoWiFi service to the VoLTE service in the specific embodiment provided by the present invention, after a CP (Coprocessor) fails to establish a link due to an exception, and then when an IMS PDN (IMS default bearer) is established through the CP request, the request types are all set to handover, so as to ensure that an IMS PDN meeting the protocol requirement can be established regardless of whether a non-3GPP link exists on the Network side, if a PGW (Packet Data Network Gateway) queries that the current non-3GPP link is released, a reject request message, rejectase #54, the terminal retries with an init again, and reestablishes the IMS PDN.
If the terminal is dropped due to an abnormality, the terminal initiates the establishment of the IMS PDN again and carries a handover flag, the network side actively issues the establishment of the dedicated bearer after the establishment of the IMS default bearer is completed, at the moment, the terminal needs to actively refuse the establishment of the dedicated bearer, so that the network side is informed that the call does not exist at the moment, the network side releases the call resource of the opposite terminal, and the user cost is saved.
In summary, the method for switching from the non-3GPP access network to the 3GPP access network provided by the present invention can avoid the problems of silent call, dropped call, and the like caused by the asynchronous network before and after switching.
In the method for switching from the non-3GPP access network to the 3GPP access network provided in the embodiment of the present invention, if the link establishment fails when the non-3GPP access network is switched to the 3GPP access network, the link establishment request is re-initiated and the request type is set to be switched, and when the network rejects the link establishment request, a new link establishment request is re-initiated and the request type is set to be initialized. Compared with the prior art, the method and the device can determine the type of the link establishment request when the IMS default bearer is established through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
Optionally, as shown in fig. 4, the method further includes:
s106, after the data link is failed to be established with the network side equipment through the 3GPP access network, sending an attachment request message carrying an international mobile subscriber identity to the network side equipment, so that the network side equipment queries whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
s107, receiving a message carrying an attach acceptance request of a first characteristic network element sent by the network side equipment, wherein the first characteristic network element marks whether a non-3GPP link at the network side still exists;
s108, according to the first characteristic network element, sending a request message for establishing an IMS default bearer to the network side equipment;
s109, receiving a message that the IMS default bearer is successfully established and sent by the network side equipment.
Optionally, the sending, according to the first feature network element, the request message for establishing the IMS default bearer to the network side device includes:
when the first characteristic network element marks that the network side non-3GPP link exists, a request message for establishing an IMS default bearer is sent to the network side equipment through a 3GPP access network, and the request type of the request message is set as switching;
and when the first characteristic network element marks that the network side non-3GPP link does not exist, sending a request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization.
As shown in fig. 5, in the specific embodiment of the method for switching a non-3GPP access network to a 3GPP access network provided by the present invention, when initiating an ATTACH request (ATTACH request) to a PGW, a UE carries an IMSI (International Mobile Subscriber identity Number), so that the network initiates a query of a non-3GPP link according to the IMSI, and carries a feature network element, voip-non-3 GPP-pp-access, in an ATTACH accept (accept ATTACH request) sent to the UE according to a query result, if the presence of the non-3GPP link is queried, the UE carries a handover flag when establishing an IMS PDN; if the non-3GPP link does not exist, the voip-non-3GPP-access is equal to 0, and the UE carries an init flag when establishing the IMS PDN.
Optionally, as shown in fig. 6, the method further includes:
s110, after a data link is failed to be established with network side equipment through a 3GPP access network, a tracking area updating request message carrying an international mobile subscriber identity is sent to the network side equipment, so that the network side equipment queries whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
s111, receiving a message which is sent by the network side equipment and carries a second characteristic network element and receives a tracking area updating request, wherein the second characteristic network element marks whether a non-3GPP link at the network side still exists;
s112, according to the second characteristic network element, sending a request message for establishing an IMS default bearer to the network side equipment;
and S113, receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
Optionally, the sending, according to the second feature network element, the request message for establishing the IMS default bearer to the network side device includes:
when the second characteristic network element marks that the network side non-3GPP link exists, a request message for establishing an IMS default bearer is sent to the network side equipment through a 3GPP access network, and the request type of the request message is set as switching;
and when the second characteristic network element marks that the network side non-3GPP link does not exist, sending a request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization.
As shown in fig. 7, in the specific embodiment of the method for switching a non-3GPP access network to a 3GPP access network provided by the present invention, when initiating a TAU request (tracking area update request) to a PGW, a UE carries an IMSI (International Mobile Subscriber identity Number), so that the network initiates a query of a non-3GPP link according to the IMSI, and carries a feature network element, voip-non-3 GPP-app-access, in a TAU accept (accept attach request) sent to the UE according to a query result, if it is queried that the non-3GPP link exists, the UE carries a handover flag when establishing an IMS PDN; if the non-3GPP link is not found, and the voip-non-3GPP-access is equal to 0, the UE carries an init flag when establishing the IMS PDN.
In the method for switching from the non-3GPP access network to the 3GPP access network provided in the embodiment of the present invention, the attach request or the tracking area update request message carries the international mobile subscriber identity, so that the network queries whether a non-3GPP link still exists, and determines the type of the link establishment request according to the query result. Compared with the prior art, the method and the device can determine the type of the link establishment request when the IMS default bearer is established through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
An embodiment of the present invention further provides a device for switching from a non-3GPP access network to a 3GPP access network, where as shown in fig. 8, the device includes:
a first sending unit 101, configured to send a request message for establishing an IMS default bearer to a network side device through a 3GPP access network after the IMS default bearer is failed to be established with the network side device through the 3GPP access network, where a request type of the request message is set to be handover;
a first receiving unit 102, configured to receive a message sent by the network side device, where the message rejects establishment of an IMS default bearer;
a second sending unit 103, configured to send a new request message for establishing an IMS default bearer to the network side device through a 3GPP access network, where a request type of the request message is set to be initialized;
a second receiving unit 104, configured to receive a message that the IMS default bearer is successfully established and sent by the network side device.
Optionally, as shown in fig. 9, the apparatus further includes:
a third receiving unit 105, configured to receive, after the first sending unit 101 sends the request message for establishing the IMS default bearer to the network side device through the 3GPP access network, a message that the IMS default bearer is successfully established and sent by the network side device.
The device for switching from the non-3GPP access network to the 3GPP access network provided by the embodiment of the invention re-initiates the chain establishment and sets the request type as the switching if the chain establishment fails when switching from the non-3GPP access network to the 3GPP access network, and re-initiates a new chain establishment and sets the request type as the initialization when the network rejects the request for chain establishment. Compared with the prior art, the method and the device can determine the type of the link establishment request when the IMS default bearer is established through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
Optionally, as shown in fig. 10, the apparatus further includes:
a third sending unit 106, configured to send an attach request message carrying an international mobile subscriber identity to a network-side device after a failure of establishing a data link with the network-side device through a 3GPP access network occurs, so that the network-side device queries whether a network-side non-3GPP link still exists according to the international mobile subscriber identity;
a fourth receiving unit 107, configured to receive a message, which is sent by the network side device and carries an attach accept request of a first feature network element, where the first feature network element marks whether the network side non-3GPP link still exists;
a fourth sending unit 108, configured to send a request message for establishing an IMS default bearer to the network side device according to the first feature network element;
a fifth receiving unit 109, configured to receive a message that the IMS default bearer is successfully established and sent by the network side device.
Optionally, as shown in fig. 11, the fourth sending unit 108 includes:
a first sending module 1081, configured to send, when the first feature network element indicates that the network-side non-3GPP link exists, a request message for establishing an IMS default bearer to the network-side device through a 3GPP access network, where a request type of the request message is set to be handover;
a second sending module 1082, configured to send, when the first feature network element indicates that the network-side non-3GPP link does not exist, a request message for establishing an IMS default bearer to the network-side device through a 3GPP access network, where a request type of the request message is set to be initialized.
Optionally, as shown in fig. 12, the apparatus further includes:
a fifth sending unit 110, configured to send a tracking area update request message carrying an international mobile subscriber identity to a network-side device after a failure of establishing a data link with the network-side device through a 3GPP access network, so that the network-side device queries whether a network-side non-3GPP link still exists according to the international mobile subscriber identity;
a sixth receiving unit 111, configured to receive a message, which is sent by the network side device and carries a second feature network element, and the second feature network element marks whether the network side non-3GPP link still exists;
a sixth sending unit 112, configured to send, according to the second feature network element, a request message for establishing an IMS default bearer to the network side device;
a seventh receiving unit 113, configured to receive a message that the IMS default bearer is successfully established and sent by the network side device.
Optionally, as shown in fig. 13, the sixth sending unit 112 includes:
a third sending module 1121, configured to send, when the second feature network element indicates that the network-side non-3GPP link exists, a request message for establishing an IMS default bearer to the network-side device through a 3GPP access network, where a request type of the request message is set to be handover;
a fourth sending module 1122, configured to send, when the second-feature network element indicates that the network-side non-3GPP link does not exist, a request message for establishing an IMS default bearer to the network-side device through a 3GPP access network, where a request type of the request message is set to be initialized.
The device for switching from the non-3GPP access network to the 3GPP access network provided by the embodiment of the invention carries the international mobile subscriber identity in the attachment request or the tracking area updating request message, so that the network queries whether the non-3GPP link still exists, and determines the type of the link establishment request according to the query result. Compared with the prior art, the method and the device can determine the type of the link establishment request when the IMS default bearer is established through the 3GPP access network, thereby improving the success rate of switching from the non-3GPP access network to the 3GPP access network.
The embodiment of the invention also provides a terminal which comprises the device for switching from the non-3GPP access network to the 3GPP access network.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
1. A method of switching from a non-3GPP access network to a 3GPP access network, the method comprising:
after failure of establishing an IMS default bearer with network side equipment through a 3GPP access network, sending a request message for establishing the IMS default bearer to the network side equipment through the 3GPP access network, wherein the request type of the request message is set as switching;
when network side equipment refuses to establish an IMS default bearer, receiving a message which is sent by the network side equipment and refuses to establish the IMS default bearer;
sending a new request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization;
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
2. The method of claim 1, wherein after the sending the request message for establishing the IMS default bearer to the network-side device through the 3GPP access network, the method further comprises:
and when the IMS default bearer is successfully established, receiving a message which is sent by the network side equipment and successfully establishes the IMS default bearer.
3. The method of claim 1, further comprising:
after the IMS default bearer establishment between the 3GPP access network and the network side equipment fails, sending an attachment request message carrying an international mobile subscriber identity to the network side equipment so that the network side equipment can inquire whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
receiving a message carrying an attach acceptance request of a first characteristic network element sent by the network side equipment, wherein the first characteristic network element marks whether the non-3GPP link at the network side still exists;
according to the first characteristic network element, sending a request message for establishing an IMS default bearer to the network side equipment;
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
4. The method of claim 3, wherein the sending, according to the first feature network element, the request message for establishing the IMS default bearer to the network side device comprises:
when the first characteristic network element marks that the network side non-3GPP link exists, a request message for establishing an IMS default bearer is sent to the network side equipment through a 3GPP access network, and the request type of the request message is set as switching;
and when the first characteristic network element marks that the network side non-3GPP link does not exist, sending a request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization.
5. The method of claim 1, further comprising:
after the IMS default bearer establishment between the 3GPP access network and the network side equipment fails, a tracking area update request message carrying an international mobile subscriber identity is sent to the network side equipment, so that the network side equipment queries whether a network side non-3GPP link still exists according to the international mobile subscriber identity;
receiving a message which is sent by the network side equipment and carries a second characteristic network element and is used for receiving a tracking area updating request, wherein the second characteristic network element marks whether a non-3GPP link at the network side still exists;
according to the second characteristic network element, sending a request message for establishing an IMS default bearer to the network side equipment;
and receiving a message which is sent by the network side equipment and is used for successfully establishing the IMS default bearer.
6. The method of claim 5, wherein the sending, according to the second feature network element, the request message for establishing the IMS default bearer to the network side device comprises:
when the second characteristic network element marks that the network side non-3GPP link exists, a request message for establishing an IMS default bearer is sent to the network side equipment through a 3GPP access network, and the request type of the request message is set as switching;
and when the second characteristic network element marks that the network side non-3GPP link does not exist, sending a request message for establishing an IMS default bearer to the network side equipment through a 3GPP access network, wherein the request type of the request message is set as initialization.
7. An apparatus for handing off from a non-3GPP access network to a 3GPP access network, the apparatus comprising:
a first sending unit, configured to send, to a network side device through a 3GPP access network, a request message for establishing an IMS default bearer after a failure to establish the IMS default bearer with the network side device through the 3GPP access network, where a request type of the request message is set to handover;
a first receiving unit, configured to receive, when a network side device rejects establishment of an IMS default bearer, a message sent by the network side device and rejecting establishment of the IMS default bearer;
a second sending unit, configured to send a new request message for establishing an IMS default bearer to the network side device through a 3GPP access network, where a request type of the request message is set to be initialized;
a second receiving unit, configured to receive a message that the IMS default bearer is successfully established, where the message is sent by the network side device.
8. The apparatus of claim 7, further comprising:
a third receiving unit, configured to receive, after the first sending unit sends the request message for establishing the IMS default bearer to the network side device through the 3GPP access network, a message that the IMS default bearer is successfully established and sent by the network side device when the IMS default bearer is successfully established.
9. The apparatus of claim 7, further comprising:
a third sending unit, configured to send an attach request message carrying an international mobile subscriber identity to the network-side device after the failure of establishing the IMS default bearer with the network-side device through the 3GPP access network, so that the network-side device queries whether a network-side non-3GPP link still exists according to the international mobile subscriber identity;
a fourth receiving unit, configured to receive a message, which is sent by the network side device and carries an attach accept request of a first feature network element, where the first feature network element marks whether the network side non-3GPP link still exists;
a fourth sending unit, configured to send, to the network side device, a request message for establishing an IMS default bearer according to the first feature network element;
a fifth receiving unit, configured to receive a message that the IMS default bearer is successfully established, where the message is sent by the network side device.
10. The apparatus of claim 9, wherein the fourth sending unit comprises:
a first sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the first feature network element indicates that the network side non-3GPP link exists, where a request type of the request message is set to be handover;
a second sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the first feature network element indicates that the network-side non-3GPP link does not exist, where a request type of the request message is set to be initialized.
11. The apparatus of claim 7, further comprising:
a fifth sending unit, configured to send a tracking area update request message carrying an international mobile subscriber identity to the network-side device after the failure of establishing the IMS default bearer with the network-side device through the 3GPP access network, so that the network-side device queries whether a network-side non-3GPP link still exists according to the international mobile subscriber identity;
a sixth receiving unit, configured to receive a message, which is sent by the network side device and carries a second feature network element, and the second feature network element marks whether a non-3GPP link on the network side still exists;
a sixth sending unit, configured to send, to the network side device, a request message for establishing an IMS default bearer according to the second feature network element;
a seventh receiving unit, configured to receive a message that the IMS default bearer is successfully established, where the message is sent by the network side device.
12. The apparatus of claim 11, wherein the sixth sending unit comprises:
a third sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the second feature network element indicates that the network-side non-3GPP link exists, where a request type of the request message is set to be handover;
a fourth sending module, configured to send, to the network side device through a 3GPP access network, a request message for establishing an IMS default bearer when the second feature network element indicates that the network-side non-3GPP link does not exist, where a request type of the request message is set to be initialized.
13. A terminal, characterised in that the terminal comprises an arrangement for handover from a non-3GPP access network to a 3GPP access network according to any of claims 7 to 12.
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| WO2021066346A1 (en) * | 2019-10-02 | 2021-04-08 | 엘지전자 주식회사 | Method for moving pdu session on non-3gpp to 3gpp access |
| WO2023143270A1 (en) * | 2022-01-29 | 2023-08-03 | 华为技术有限公司 | Communication method and apparatus |
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