CN108632936B - Method for anchoring core network, UE and PGW - Google Patents
Method for anchoring core network, UE and PGW Download PDFInfo
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Abstract
The embodiment of the invention provides a method for anchoring a core network, UE and a PGW, wherein the method comprises the following steps: when UE attaches to a first network, the UE receives a P-CSCF address list returned by a PGW; the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered; and when the UE is switched to a second network, the UE receives a P-CSCF address, which is returned by the PGW and is successfully registered in the first network, of the UE. The embodiment of the invention can ensure that the P-CSCF address received by the UE after the network is switched is the same as the P-CSCF address successfully registered by the UE before the network is switched, thereby ensuring that the UE continues to anchor a core network and ensuring the continuity of the current service of the UE.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for anchoring a core network, a UE, and a PGW.
Background
Anchoring refers to routing a call of a User Equipment (UE) into a core network. In practical applications, a UE may switch back and forth between different networks, for example, between LTE and WiFi, and a service used by the corresponding UE may switch between VoLTE (Voice over Long Term Evolution) and VoWiFi (Voice over WiFi).
Currently, when a UE is attached, the UE receives at least one Proxy Call Session Control function (P-CSCF) address, and selects one P-CSCF address from the P-CSCF addresses to register to use a core Network service, but a Packet Data Network Gateway (PGW) does not know the P-CSCF address where the UE successfully registers, and when the UE switches to another Network, the P-CSCF address returned by the PGW to the UE may be different from the P-CSCF address where the UE successfully registers before switching the Network, so that the service currently performed by the UE is confused, and the UE is affected to use the core Network service.
Disclosure of Invention
The embodiments of the present invention provide a method for anchoring a core network, a UE and a PGW, which solve the problem in the prior art that when the UE switches networks, a P-CSCF address returned by the PGW is different from a P-CSCF address successfully registered by the UE before network switching, so that the service currently performed by the UE is disordered and the use of the core network service by the UE is affected.
In order to achieve the above object, an embodiment of the present invention provides a method for anchoring a core network, including:
when UE attaches to a first network, the UE receives a P-CSCF address list returned by a PGW;
the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered;
and when the UE is switched to a second network, the UE receives a P-CSCF address, which is returned by the PGW and is successfully registered in the first network, of the UE.
The embodiment of the invention also provides another method for anchoring the core network, which comprises the following steps:
when UE attaches to a first network, a PGW returns a P-CSCF address list to the UE;
the PGW identifies registration messages which are sequentially sent to the P-CSCF corresponding to the P-CSCF address list by the UE through the PGW, and records the P-CSCF address of the UE which is successfully registered;
and when the UE is switched to a second network, the PGW returns the P-CSCF address of the UE successfully registered in the first network to the UE.
An embodiment of the present invention further provides a UE, including:
a first receiving module, configured to receive a P-CSCF address list returned by a PGW when the UE attaches to a first network;
a sending module, configured to send, by the PGW, a registration packet to the P-CSCF corresponding to the P-CSCF address list in sequence until registration is successful, so that the PGW identifies the registration packet and records a P-CSCF address at which the UE successfully registers;
a second receiving module, configured to receive, when the UE is handed over to a second network, a P-CSCF address, which is returned by the PGW and in which the UE is successfully registered in the first network, where the P-CSCF address is received from the PGW.
An embodiment of the present invention further provides a PGW, including:
the first sending module is used for returning a P-CSCF address list to the UE when the UE is attached to a first network;
the identification recording module is used for identifying the registration messages which are sequentially sent to the P-CSCF corresponding to the P-CSCF address list by the UE through the PGW and recording the P-CSCF address of the UE which is successfully registered;
and the second sending module is used for returning the P-CSCF address of the UE successfully registered in the first network to the UE when the UE is switched to a second network.
Embodiments of the present invention further provide a computer storage medium, in which one or more programs executable by a computer are stored, and when the one or more programs are executed by the computer, the computer executes the method for anchoring a core network provided as above.
One of the above technical solutions has the following advantages or beneficial effects:
when UE attaches to a first network, the UE receives a P-CSCF address list returned by a PGW; the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered; and when the UE is switched to a second network, the UE receives a P-CSCF address which is returned by the PGW and is successfully registered in the first network. Therefore, the P-CSCF address received by the UE after the network is switched is ensured to be the same as the P-CSCF address successfully registered by the UE before the network is switched, so that the UE continues to anchor a core network and the continuity of the current service of the UE is ensured.
Drawings
FIG. 1 is a schematic diagram of a network architecture in which embodiments of the present invention may be used;
fig. 2 is a flowchart illustrating a method for anchoring a core network according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating another method for anchoring a core network according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a UE according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another UE according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another UE according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a PGW according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of another PGW according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of another PGW according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of a network structure to which an embodiment of the present invention is applicable, as shown in fig. 1, including: the UE may be a terminal side Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that, in the embodiment of the present invention, the specific type of the UE is not limited, in the figure, only the UE is taken as an example for switching between the LTE network and the WiFi network, the specific type of the UE switching network is not limited in the embodiment of the present invention, the UE is taken as an Access Point (Access Point, AP) and a Wireless Controller (Access Point, controller, access Point, AC) in the embodiment of the present invention, and the specific type of the UE switching network is taken as an example, and the UE is taken as an example in the embodiment of the present invention, and the specific type of the eNodeB is taken as an Access Point in the embodiment of the present invention.
As shown in fig. 2, an embodiment of the present invention provides a method for anchoring a core network, where the method includes the following steps:
step S201, when the UE attaches to the first network, the UE receives a P-CSCF address list returned by the PGW.
In this step, the UE attaches to the first network for the purpose of successfully accessing the core network, the PGW provides functions such as session management and IP address allocation for the UE accessing the core network, and when the UE attaches to the first network, the PGW returns a P-CSCF address list to the UE for the UE to register with a P-CSCF corresponding to the P-CSCF address list to access the core network, where the core network may be an IP Multimedia Subsystem (IMS), the IMS is a brand new Multimedia service format and can meet the requirement of a new and more diverse Multimedia service of a current terminal client.
Step S202, the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered.
In this step, the UE selects a P-CSCF address from the received P-CSCF address list for registration, the UE will first send a registration message to the PGW, the PGW identifies the registration message, and forwards the registration message to the P-CSCF corresponding to the P-CSCF address, if the P-CSCF returns an unsuccessful registration response to the UE through the PGW, the UE continues to select other P-CSCF addresses for registration until the UE receives a successful registration response through the PGW, after the UE is successfully registered, the UE can access a core network to enjoy services, and the PGW records the successful P-CSCF address of the UE registration, so that the PGW returns the successful P-CSCF address to the UE after the UE switches networks, thereby preventing the services currently performed by the UE from being interrupted and ensuring service continuity.
Step S203, when the UE is switched to the second network, the UE receives the P-CSCF address, which is returned by the PGW and where the UE is successfully registered in the first network.
In this step, when the UE is switched to the second network, the UE attaches to the second network, the PGW returns the recorded P-CSCF address of the UE successfully registered in the first network to the UE, so that the UE can continue to anchor the original core network, the UE stores a registration packet sent by the UE in the P-CSCF corresponding to the P-CSCF address of the first network successfully registered, and the UE does not need to register again and can continue to use core network services, so that the P-CSCF address received after the UE switches networks is the same as the P-CSCF address of the successful registration before the network switching, thereby ensuring continuity of services currently performed by the UE.
In the embodiment, when a UE attaches to a first network, the UE receives a P-CSCF address list returned by a PGW; the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered; and when the UE is switched to a second network, the UE receives a P-CSCF address which is returned by the PGW and is successfully registered in the first network. Therefore, the P-CSCF address received by the UE after the network is switched is ensured to be the same as the P-CSCF address successfully registered by the UE before the network is switched, so that the UE continues to anchor a core network and the continuity of the current service of the UE is ensured.
As shown in fig. 3, another method for anchoring a core network according to an embodiment of the present invention includes the following steps:
step S301, when the UE attaches to a first network, the UE receives a P-CSCF address list returned by the PGW, where the first network is a Long Term Evolution (LTE) network.
In this step, the first network is an LTE network, and when the UE attaches to the LTE network, the UE sends an Attach message to a Mobility Management Entity (MME), the MME receives the Attach message, selects the PGW, and sends a request for creating a session connection to the PGW, where the session connection is used for communication between the MME and the PGW, and the PGW returns a response for creating the session connection to the MME after receiving the request for creating the session connection, and sends a P-CSCF address list to the MME, and the MME forwards the P-CSCF address list to the UE so that the UE registers with a P-CSCF corresponding to the P-CSCF address list to access a core network.
Step S302, the UE sequentially sends a registration packet to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration packet and records the P-CSCF address where the UE is successfully registered.
Step S303, when the UE is switched to a second network, the UE sends an Attach message to an evolved packet data gateway ePDG, and performs negotiation establishment of an internet key exchange protocol IKE tunnel and an internet security protocol IPSec tunnel with the ePDG, so that the UE and the ePDG perform secure information interaction, where the second network is a Wireless (WiFi) network.
In this step, when the UE is handed over to the WiFi network, the UE may establish an IKE tunnel and an IPSec tunnel with the ePDG, so as to ensure that the UE and the ePDG perform secure and secure communication over an IP protocol network.
Step S304, the UE sends an Authentication request to an Authentication Authorization and Accounting (AAA) entity through the ePDG.
In this step, the UE sends an authentication request to the ePDG, where the authentication request carries user identification information, and the ePDG forwards the authentication request to the AAA entity, so that the AAA entity performs identity verification and authorization on the UE after receiving the authentication request.
Step S305, the UE receives, through the ePDG, an authentication success response returned by the AAA entity, so that the ePDG selects the PGW, and the ePDG and the PGW establish a session connection.
In this step, the AAA entity authenticates the identity of the UE according to the received authentication request and the user identification information, after the authentication is successful, the AAA entity returns an authentication success response to the ePDG, the ePDG forwards the authentication success response to the UE, and sends a session establishment connection request to the PGW, the PGW returns a session establishment connection response to the ePDG after receiving the session establishment connection request, and the session connection is used for the ePDG and the PGW to communicate.
Step S306, the UE receives, through the ePDG, the P-CSCF address, which is returned by the PGW and where the UE is successfully registered in the first network.
In this step, the PGW sends the recorded P-CSCF address of the UE successfully registered in the LTE network to the ePDG, and the ePDG forwards the P-CSCF address of the UE successfully registered in the LTE network to the UE, where the UE stores a registration packet sent by the UE in a P-CSCF corresponding to the P-CSCF address of the UE successfully registered in the LTE network, and the UE does not need to register again and can continue to use core network services, so that it is ensured that the P-CSCF address received after the UE is switched to the WiFi network is the same as the P-CSCF address of the UE successfully registered in the LTE network, so that the UE can continue to anchor an original core network and ensure continuity of services currently performed by the UE.
The embodiment also can ensure that the P-CSCF address received by the UE after network switching is the same as the P-CSCF address successfully registered by the UE before network switching, so that the UE continues to anchor the core network and the continuity of the service currently performed by the UE is ensured.
As shown in fig. 4, an embodiment of the present invention provides another method for anchoring a core network, where the method includes the following steps:
step S401, when the UE is attached to a first network, the UE receives a P-CSCF address list returned by the PGW, wherein the first network is a WiFi network.
In this step, the first network is a WiFi network, when the UE attaches to the WiFi network, the UE first sends an Attach message to an ePDG, and establishes an IKE tunnel and an IPSec tunnel with the ePDG to ensure that the UE and the ePDG perform secure and secure communication on an IP protocol network, then the UE sends an authentication request to the ePDG, where the authentication request carries user identification information, the ePDG forwards the authentication request to the AAA entity, the AAA entity receives the authentication request, performs identity verification and authorization on the UE, after the authentication is successful, the AA entity returns an authentication success response to the ePDG, the ePDG forwards the authentication success response to the UE, selects the PGW, and sends a session establishment connection request to the PGW, where the session connection is used for the ePDG and the PGW to communicate, and after the PGW receives the session establishment connection request, the PGW sends a P-CSCF address list to the ePDG, and the ePDG forwards the P-CSCF address list to the P-CSCF for registering the UE to register the P-CSCF address list to the P-CSCF.
And step S402, the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered.
Step S403, when the UE is switched to a second network, the UE sends an attach message to an MME, so that the MME selects the PGW and establishes a session connection between the MME and the PGW, where the second network is an LTE network.
In this step, when the UE is switched to the LTE network, the UE may send an Attach message to the MME, the MME may select the PGW after receiving the Attach message, and send a session establishment connection request to the PGW, the PGW may return a session establishment connection response to the MME after receiving the session establishment connection request, and the session connection is used for communication between the MME and the PGW.
Step S404, the UE receives, through the MME, a P-CSCF address, which is returned by the PGW and in which the UE is successfully registered in the first network.
In this step, the PGW sends the recorded P-CSCF address of the UE successfully registered in the WiFi network to the MME, the MME forwards the P-CSCF address of the UE successfully registered in the WiFi network to the UE, the UE stores the registration packet sent by the UE in the P-CSCF corresponding to the P-CSCF address of the UE successfully registered in the first network, and the UE can continue to use core network services without re-registering, so that the P-CSCF address received after the UE is switched to the LTE network is the same as the P-CSCF address of the UE successfully registered in the WiFi network, so that the UE can continue to anchor the original core network and ensure continuity of the service currently performed by the UE.
The embodiment also can ensure that the P-CSCF address received by the UE after network switching is the same as the P-CSCF address successfully registered by the UE before network switching, so that the UE continues to anchor the core network and the continuity of the service currently performed by the UE is ensured.
As shown in fig. 5, another method for anchoring a core network according to an embodiment of the present invention includes the following steps:
step S501, when the UE attaches to the first network, the PGW returns a P-CSCF address list to the UE.
Step S502, the PGW identifies the registration messages which are sequentially sent to the P-CSCF corresponding to the P-CSCF address list by the UE through the PGW, and records the P-CSCF address of the UE which is successfully registered.
Step S503, when the UE switches to the second network, the PGW returns, to the UE, the P-CSCF address where the UE successfully registers in the first network.
It should be noted that, this embodiment is used as a PGW implementation corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to the relevant description of the embodiment shown in fig. 2, and for avoiding repeated description, this embodiment is not described again. The embodiment can ensure that after the UE switches the network, the PGW can accurately return the P-CSCF address of the UE, which is successfully registered before the network is switched, to the UE, so that the UE continues to anchor a core network, and the continuity of the service currently performed by the UE is ensured.
As shown in fig. 6, an embodiment of the present invention provides another method for anchoring a core network, where the method includes the following steps:
step S601, when the UE attaches to a first network, the PGW returns a P-CSCF address list to the UE, wherein the first network is an LTE network.
Step S602, the PGW identifies registration packets that the UE sequentially sends to the P-CSCF corresponding to the P-CSCF address list via the PGW, and records the P-CSCF address where the UE successfully registers.
Step S603, when the UE is handed over to a second network, the PGW receives a session establishment connection request sent by the ePDG, and returns a session establishment connection response to the ePDG, where the second network is a WiFi network, and the ePDG is configured to receive an attach message sent by the UE, and perform negotiation setup of an IKE tunnel and an IPSec tunnel with the UE, so that the UE and the ePDG perform secure information interaction.
Step S604, the PGW returns, to the UE through the ePDG, a P-CSCF address where the UE successfully registers with the first network.
It should be noted that, this embodiment is used as a PGW implementation corresponding to the embodiment shown in fig. 3, and for a specific implementation of this embodiment, reference may be made to the relevant description of the embodiment shown in fig. 3, and in order to avoid repeated description, this embodiment is not described again. The embodiment can ensure that after the UE switches the network, the PGW can accurately return the P-CSCF address of the UE, which is successfully registered before the network is switched, to the UE, so that the UE continues to anchor a core network, and the continuity of the service currently performed by the UE is ensured.
As shown in fig. 7, an embodiment of the present invention provides another method for anchoring a core network, where the method includes the following steps:
and step S701, when the UE is attached to a first network, the PGW returns a P-CSCF address list to the UE, wherein the first network is a WiFi network.
Step S702, the PGW identifies registration packets that the UE sequentially sends to the P-CSCF corresponding to the P-CSCF address list via the PGW, and records the P-CSCF address where the UE successfully registers.
Step S703, when the UE is switched to a second network, the PGW receives a session establishment connection request sent by an MME, and returns a session establishment connection response to the MME, where the second network is an LTE network, and the MME is configured to receive an attach message sent by the UE.
Step S704, the PGW returns, to the UE through the MME, a P-CSCF address where the UE successfully registers in the first network.
It should be noted that, this embodiment is used as a PGW implementation corresponding to the embodiment shown in fig. 4, and specific implementation thereof may refer to the relevant description of the embodiment shown in fig. 4, and for avoiding repeated description, this embodiment is not described again. The embodiment can ensure that after the UE switches the network, the PGW can accurately return the P-CSCF address of the UE, which is successfully registered before the network is switched, to the UE, so that the UE continues to anchor a core network, and the continuity of the service currently performed by the UE is ensured.
The embodiments described in the above examples will now be illustrated by way of example in connection with figure 1:
example 1:
in this example, a first network is an LTE network, a second network is a WiFi network, referring to fig. 1, the UE attaches to the LTE network and sends an Attach message to the MME, the MME sends a request for creating a session connection to the PGW, the PGW returns a response for creating a session connection and a P-CSCF address list to the MME, the MME forwards the P-CSCF address list to the UE, the UE sequentially registers with P-CSCFs corresponding to the P-CSCF address list until the registration is successful, the UE may anchor an IMS core network to perform an IMS service, and the PGW records a P-CSCF address where the registration of the UE is successful.
When the UE switches to the WiFi network, first, the UE and the ePDG perform an internet key exchange-Security Association-initialization (IKE _ SA _ INIT) request/IKE _ SA _ INIT response message pair interaction, so as to negotiate an encryption algorithm and establish an IKE tunnel.
Then, the UE sends an internet key exchange-Authentication (IKE _ AUTH) request to the ePDG to authenticate the IKE _ SA _ INIT message, where the IKE _ AUTH request carries user identification information. The ePDG sends a Diameter Extensible Authentication Protocol Request (DER) message to the AAA entity, the DER message carries user identification information, the AAA entity sends a Diameter EAP Answer (DEA) message to the ePDG after receiving the DER message and initiates an EAP Request, if the AAA entity does not have user data, the AAA entity needs to acquire the message in an HSS, the EAP Request carries an Authentication and Key Agreement (AKA) challenge, and the ePDG sends an IKE _ AUTH response and the EAP Request to the UE.
And the UE sends an IKE _ AUTH request to the ePDG again through authentication, generates an EAP response, wherein the EAP response carries an AKA challenge response, the ePDG sends the EAP response to the AAA entity, the AAA entity sends an EAP success message to the ePDG, and the EAP success message carries user information. The ePDG selects the PGW and sends a session connection establishment request to the PGW, the PGW returns a session connection establishment response and a P-CSCF address recorded by the PGW and successfully registered in the LTE network by the UE to the ePDG, and the ePDG sends an IKE _ AUTH response and an EAP success message to the UE to inform the UE of successful authentication.
And finally, the UE carries out integrity and authenticity verification, generates an AUTH parameter through calculation, and sends an IKE _ AUTH request and the AUTH parameter to the ePDG, the ePDG passes the verification after receiving the IKE _ AUTH request, and forwards a P-CSCF address recorded by the PGW and successfully registered in the LTE network to the UE, so that the UE can continue anchoring the IMS core network, and thus the P-CSCF address received after the UE is switched to the WiFi network is the same as the P-CSCF address successfully registered in the LTE network by the UE, and the continuity of the service currently carried out by the UE is ensured. The specific flow may be as shown in fig. 8.
Example 2:
in this example, the first network is a WiFi network, the second network is an LTE network, and referring to fig. 1, the UE attaches to the WiFi network and interacts with the ePDG through an IKE _ SA _ INIT request/IKE _ SA _ INIT response message pair, so as to establish an IKE tunnel.
Then, the UE sends an IKE _ AUTH request to the ePDG, where the IKE _ AUTH request carries user identification information. The ePDG sends a DER message to the AAA entity, the DER message carries user identification information, the AAA entity sends a DEA message to the ePDG after receiving the DER message and initiates an EAP request, the EAP request carries AKA challenge, and the ePDG sends an IKE _ AUTH response and the EAP request to the UE.
And the UE sends an IKE _ AUTH request to the ePDG again through authentication, generates an EAP response, wherein the EAP response carries an AKA challenge response, the ePDG sends the EAP response to the AAA entity, the AAA entity sends an EAP success message to the ePDG, and the EAP success message carries user information. The ePDG selects the PGW and sends a request for establishing session connection to the PGW, the PGW returns a response for establishing session connection and a P-CSCF address list to the ePDG, and the ePDG sends an IKE _ AUTH response and an EAP success message to the UE to inform the UE that the authentication is successful.
And finally, the UE carries out integrity and authenticity verification, generates an AUTH parameter through calculation, sends an IKE _ AUTH request and the AUTH parameter to the ePDG, the ePDG passes the verification after receiving the IKE _ AUTH request and forwards the P-CSCF address list to the UE, the UE sequentially registers to a P-CSCF corresponding to the P-CSCF address list until the registration is successful so as to carry out IMS service, and the PGW records the P-CSCF address of the UE which is successfully registered.
When the UE is switched to the LTE network, the UE sends an Attach message to the MME, the MME sends a request for creating session connection to the PGW, the PGW returns a response for creating session connection and a P-CSCF address recorded by the PGW and successfully registered in the WiFi network by the UE, and the MME forwards the P-CSCF address recorded by the PGW and successfully registered in the WiFi network by the UE to the UE so that the UE can continue to anchor the IMS core network. The specific flow may be as shown in fig. 9.
As shown in fig. 10, an embodiment of the present invention provides a UE100, including:
a first receiving module 101, configured to receive a P-CSCF address list returned by a PGW when the UE100 attaches to a first network;
a sending module 102, configured to send, by the PGW, a registration packet to the P-CSCF corresponding to the P-CSCF address list in sequence until registration is successful, so that the PGW identifies the registration packet and records the P-CSCF address where the UE100 successfully registers;
a second receiving module 103, configured to receive, when the UE100 is handed over to a second network, a P-CSCF address, which is returned by the PGW and where the UE100 successfully registers in the first network, where the P-CSCF address is received.
Optionally, when the first network is an LTE network and the second network is a WiFi network, as shown in fig. 11, the second receiving module 103 includes:
a first sending unit 1031, configured to send an attach message to an ePDG, and perform negotiation setup of an IKE tunnel and an IPSec tunnel with the ePDG, so that the UE100 and the ePDG perform secure information interaction;
a second sending unit 1032, configured to send an authentication request to an AAA entity through the ePDG;
a first receiving unit 1033, configured to receive, by the ePDG, an authentication success response returned by the AAA entity, so that the ePDG selects the PGW, and the ePDG and the PGW establish a session connection;
a second receiving unit 1034, configured to receive, through the ePDG, a P-CSCF address, which is successfully registered in the first network, of the UE100 returned by the PGW.
Optionally, when the first network is a WiFi network and the second network is an LTE network, as shown in fig. 12, the second receiving module 103 includes:
a third sending unit 1035, configured to send an attach message to an MME, so that the MME selects the PGW, and the MME and the PGW create a session connection;
a third receiving unit 1036, configured to receive, by the MME, the P-CSCF address, which is returned by the PGW and for which the UE100 is successfully registered in the first network.
It should be noted that, in this embodiment, the UE may be the UE in the embodiments shown in fig. 2 to 9, and any implementation of the UE in the embodiments shown in fig. 2 to 9 may be implemented by the UE in this embodiment to achieve the same beneficial effects, which is not described herein again.
As shown in fig. 13, an embodiment of the present invention provides a PGW130, including:
a first sending module 131, configured to return a P-CSCF address list to a UE when the UE attaches to a first network;
an identifying and recording module 132, configured to identify a registration packet that is sequentially sent by the UE to the P-CSCF corresponding to the P-CSCF address list through the PGW130, and record a P-CSCF address at which the UE successfully registers;
a second sending module 133, configured to return, to the UE, a P-CSCF address where the UE is successfully registered in the first network when the UE is handed over to the second network.
Optionally, when the first network is an LTE network and the second network is a WiFi network, as shown in fig. 14, the second sending module 133 includes:
a first receiving unit 1331, configured to receive a session connection creation request sent by an ePDG, and return a session connection creation response to the ePDG, where the ePDG is configured to receive an attach message sent by the UE, and perform negotiation setup of an IKE tunnel and an IPSec tunnel with the UE, so that the UE and the ePDG perform secure information interaction;
a first sending unit 1332, configured to return, to the UE through the ePDG, a P-CSCF address where the UE successfully registers in the first network.
Optionally, when the first network is a WiFi network and the second network is an LTE network, as shown in fig. 15, the second sending module 133 includes:
a second receiving unit 1333, configured to receive a session connection creation request sent by an MME, and return a session connection creation response to the MME, where the MME is configured to receive an attach message sent by the UE;
a second sending unit 1334, configured to return, to the UE through the MME, the P-CSCF address where the UE successfully registers in the first network.
It should be noted that, the PGW in this embodiment may be the PGW in the embodiment shown in fig. 2 to 9, and any implementation of the PGW in the embodiment shown in fig. 2 to 9 may be implemented by the PGW in this embodiment to achieve the same beneficial effects, which is not described herein again.
Those skilled in the art will appreciate that all or part of the steps of the method of the above embodiments may be implemented by hardware associated with program instructions, and the program may be stored in a computer readable medium, and when executed, the program includes the following steps:
when UE attaches to a first network, the UE receives a P-CSCF address list returned by a PGW;
the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered;
and when the UE is switched to a second network, the UE receives a P-CSCF address, which is returned by the PGW and is successfully registered in the first network, of the UE.
Optionally, when the first network is an LTE network and the second network is a WiFi network, the receiving, by the UE, a P-CSCF address, returned by the PGW, of the UE that is successfully registered in the first network includes:
the UE sends an attachment message to the ePDG and carries out negotiation establishment of an IKE tunnel and an IPSec tunnel with the ePDG so as to ensure that the UE and the ePDG carry out safe information interaction;
the UE sends an authentication request to an AAA entity through an ePDG;
the UE receives an authentication success response returned by the AAA entity through the ePDG so that the ePDG can select the PGW and the ePDG and the PGW can establish session connection;
and the UE receives the P-CSCF address which is successfully registered in the first network by the UE and returned by the PGW through the ePDG.
Optionally, when the first network is a WiFi network and the second network is an LTE network, the receiving, by the UE, a P-CSCF address, returned by the PGW, where the UE is successfully registered in the first network includes:
the UE sends an attachment message to an MME so that the MME selects the PGW and establishes session connection between the MME and the PGW;
and the UE receives the P-CSCF address, which is returned by the PGW and is successfully registered in the first network, through the MME.
The storage medium includes: various media capable of storing program codes, such as Read-Only Memory (ROM), random Access Memory (RAM), magnetic disk, or optical disk.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A method of anchoring a core network, comprising:
when a user terminal UE attaches to a first network, the UE receives a proxy call session control function P-CSCF address list returned by a packet data network gateway PGW;
the UE sequentially sends registration messages to the P-CSCF corresponding to the P-CSCF address list through the PGW until the registration is successful, so that the PGW identifies the registration messages and records the P-CSCF address of the UE which is successfully registered;
and when the UE is switched to a second network, the UE receives a P-CSCF address which is returned by the PGW and is successfully registered in the first network.
2. The method of claim 1, wherein when the first network is a Long Term Evolution (LTE) network and the second network is a wireless fidelity (WiFi) network, the receiving, by the UE, the P-CSCF address returned by the PGW, where the UE is successfully registered in the first network, comprises:
the UE sends an attachment message to an evolved packet data gateway (ePDG), and negotiates and establishes an internet key exchange protocol (IKE) tunnel and an internet security protocol (IPSec) tunnel with the ePDG so as to ensure that the UE and the ePDG perform secure information interaction;
the UE sends an authentication request to an authentication, authorization and accounting (AAA) entity through an ePDG;
the UE receives an authentication success response returned by the AAA entity through the ePDG so that the ePDG selects the PGW and establishes session connection between the ePDG and the PGW;
and the UE receives the P-CSCF address which is successfully registered in the first network by the UE and returned by the PGW through the ePDG.
3. The method of claim 1, wherein when the first network is a WiFi network and the second network is an LTE network, the receiving, by the UE, a P-CSCF address returned by the PGW where the UE is successfully registered in the first network comprises:
the UE sends an attachment message to a Mobile Management Entity (MME) so that the MME selects the PGW and establishes session connection between the MME and the PGW;
and the UE receives the P-CSCF address, which is returned by the PGW and is successfully registered in the first network, through the MME.
4. A method of anchoring a core network, comprising:
when UE attaches to a first network, a PGW returns a P-CSCF address list to the UE;
the PGW identifies registration messages which are sequentially sent to the P-CSCF corresponding to the P-CSCF address list by the UE through the PGW, and records the P-CSCF address of the UE which is successfully registered;
and when the UE is switched to a second network, the PGW returns the P-CSCF address of the UE successfully registered in the first network to the UE.
5. The method of claim 4, wherein when the first network is an LTE network and the second network is a WiFi network, the PGW returns to the UE a P-CSCF address at which the UE successfully registers with the first network, and wherein the method comprises:
the PGW receives a session connection establishing request sent by an ePDG and returns a session connection establishing response to the ePDG, wherein the ePDG is used for receiving an attachment message sent by the UE and carrying out negotiation establishment of an IKE tunnel and an IPSec tunnel with the UE so as to ensure that the UE and the ePDG carry out safe information interaction;
and the PGW returns the P-CSCF address of the UE successfully registered in the first network to the UE through the ePDG.
6. The method of claim 4, wherein when the first network is a WiFi network and the second network is an LTE network, the PGW returns to the UE a P-CSCF address at which the UE successfully registers with the first network, and wherein the method comprises:
the PGW receives a session connection establishment request sent by an MME, and returns a session connection establishment response to the MME, wherein the MME is used for receiving an attachment message sent by the UE;
and the PGW returns the P-CSCF address of the UE successfully registered in the first network to the UE through the MME.
7. A user terminal, UE, comprising:
a first receiving module, configured to receive a P-CSCF address list returned by a PGW when the UE attaches to a first network;
a sending module, configured to send, by the PGW, a registration packet to the P-CSCF corresponding to the P-CSCF address list in sequence until registration is successful, so that the PGW identifies the registration packet and records a P-CSCF address at which the UE successfully registers;
a second receiving module, configured to receive, when the UE is handed over to a second network, a P-CSCF address, which is returned by the PGW and in which the UE is successfully registered in the first network, where the P-CSCF address is received from the PGW.
8. The UE of claim 7, wherein when the first network is an LTE network and the second network is a WiFi network, the second receiving module comprises:
a first sending unit, configured to send an attach message to an ePDG, and perform negotiation establishment of an IKE tunnel and an IPSec tunnel with the ePDG, so that the UE and the ePDG perform secure information interaction;
a second sending unit, configured to send an authentication request to an AAA entity through the ePDG;
a first receiving unit, configured to receive, by the ePDG, an authentication success response returned by the AAA entity, so that the ePDG selects the PGW and establishes a session connection between the ePDG and the PGW;
a second receiving unit, configured to receive, through the ePDG, a P-CSCF address, where the registration of the UE in the first network is successful, where the P-CSCF address is returned by the PGW.
9. The UE of claim 7, wherein when the first network is a WiFi network and the second network is an LTE network, the second receiving module comprises:
a third sending unit, configured to send an attach message to an MME, so that the MME selects the PGW and establishes a session connection between the MME and the PGW;
a third receiving unit, configured to receive, by the MME, a P-CSCF address, where the registration of the UE in the first network is successful, where the P-CSCF address is returned by the PGW.
10. A packet data network gateway, PGW, comprising:
the first sending module is used for returning a P-CSCF address list to the UE when the UE is attached to a first network;
the identification recording module is used for identifying the registration messages which are sequentially sent to the P-CSCF corresponding to the P-CSCF address list by the UE through the PGW and recording the P-CSCF address of the UE which is successfully registered;
and the second sending module is used for returning the P-CSCF address of the UE successfully registered in the first network to the UE when the UE is switched to a second network.
11. The PGW of claim 10, wherein when the first network is an LTE network and the second network is a WiFi network, the second sending module comprises:
a first receiving unit, configured to receive a session connection establishment request sent by an ePDG, and return a session connection establishment response to the ePDG, where the ePDG is configured to receive an attach message sent by the UE, and perform negotiation establishment of an IKE tunnel and an IPSec tunnel with the UE, so that the UE and the ePDG perform secure information interaction;
a first sending unit, configured to return, to the UE through the ePDG, a P-CSCF address where the UE successfully registers in the first network.
12. The PGW of claim 10, wherein when the first network is a WiFi network and the second network is an LTE network, the second sending module comprises:
a second receiving unit, configured to receive a session connection creation request sent by an MME, and return a session connection creation response to the MME, where the MME is configured to receive an attach message sent by the UE;
a second sending unit, configured to return, to the UE through the MME, a P-CSCF address where the UE successfully registers in the first network.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101448292A (en) * | 2008-03-05 | 2009-06-03 | 中兴通讯股份有限公司 | Method for acquiring home network proxy call session control function by access network |
| CN101552981A (en) * | 2008-03-31 | 2009-10-07 | 华为技术有限公司 | Method, system and data gateway for obtaining address of agent call conversation control entity |
| CN101730037A (en) * | 2009-05-08 | 2010-06-09 | 中兴通讯股份有限公司 | Method and system for establishing IP multimedia subsystem service |
| CN101931923A (en) * | 2009-06-26 | 2010-12-29 | 中兴通讯股份有限公司 | Method for user registration of IP multimedia subsystem network and service fulfillment system |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4864797B2 (en) * | 2006-09-11 | 2012-02-01 | Ｋｄｄｉ株式会社 | P-CSCF high-speed handoff system and P-CSCF high-speed handoff method |
| CN101296501A (en) * | 2007-04-23 | 2008-10-29 | 大唐移动通信设备有限公司 | Method and apparatus for registering mobile core network by wide band network |
| CN101136823B (en) * | 2007-08-03 | 2011-07-13 | 中兴通讯股份有限公司 | Method for obtaining proxy calling conversation control function address |
| CN100562026C (en) * | 2007-08-08 | 2009-11-18 | 中兴通讯股份有限公司 | Obtain the method and the system thereof of the address of proxy call conversation control function entity |
| JP5432150B2 (en) * | 2007-09-28 | 2014-03-05 | オランジュ | Database and method for obtaining quality of service and address of charging management entity in IMS network using such database |
| US9307454B2 (en) * | 2009-02-09 | 2016-04-05 | Qualcomm Incorporated | Method and apparatus for maintaining location continuity for a UE following handover |
| CN101730039B (en) * | 2009-05-07 | 2012-12-19 | 中兴通讯股份有限公司 | Method and system for establishing IP multimedia subsystem service |
| JP5342511B2 (en) * | 2010-06-16 | 2013-11-13 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication method and call session control server device |
| US10225178B2 (en) * | 2010-09-15 | 2019-03-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for relocating and restoring connections through a failed serving gateway and traffic offloading |
| CN103023860B (en) * | 2011-09-23 | 2016-04-20 | 联芯科技有限公司 | A kind of method and related network elements keeping IMS multi-media streaming conversation continuity |
| CN107276811B (en) * | 2013-08-07 | 2021-02-09 | 华为技术有限公司 | Method, related device and system for realizing terminal called service recovery |
| US9370037B2 (en) * | 2013-08-23 | 2016-06-14 | Verizon Patent And Licensing Inc. | Intelligent policy and charging rule function (PCRF) restoration |
| US10148487B2 (en) * | 2013-09-24 | 2018-12-04 | Nec Corporation | Methods and apparatuses for facilitating P-CSCF restoration when a P-CSCF failure has occurred |
| US9867098B2 (en) * | 2014-05-29 | 2018-01-09 | T-Mobile Usa, Inc. | Wi-Fi calling using SIP-IMS handset and evolved packet data gateway |
| CN104320800A (en) * | 2014-10-21 | 2015-01-28 | 中国联合网络通信集团有限公司 | Re-registering method and device for terminal |
-
2017
- 2017-03-21 CN CN201710169245.0A patent/CN108632936B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101448292A (en) * | 2008-03-05 | 2009-06-03 | 中兴通讯股份有限公司 | Method for acquiring home network proxy call session control function by access network |
| CN101552981A (en) * | 2008-03-31 | 2009-10-07 | 华为技术有限公司 | Method, system and data gateway for obtaining address of agent call conversation control entity |
| CN101730037A (en) * | 2009-05-08 | 2010-06-09 | 中兴通讯股份有限公司 | Method and system for establishing IP multimedia subsystem service |
| CN101931923A (en) * | 2009-06-26 | 2010-12-29 | 中兴通讯股份有限公司 | Method for user registration of IP multimedia subsystem network and service fulfillment system |
Non-Patent Citations (2)
| Title |
|---|
| "P-CSCF Restoration for WLAN over SWx";Alcatel-Lucent等;《3GPP TSG CT4 Meeting #70bis C4-151886》;20151016;全文 * |
| 王煜炜 ; 刘敏 ; 房秉毅."异构无线网络垂直切换技术综述".《通信学报》.2015,全文. * |
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