CN108632936A - A kind of method, UE and the PGW of anchoring core net - Google Patents
A kind of method, UE and the PGW of anchoring core net Download PDFInfo
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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
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Abstract
The embodiment of the present invention provides a kind of method, UE and the PGW of anchoring core net, and this method may include：When UE adheres to first network, the UE receives the P CSCF address lists that PGW is returned；The UE sends logon message until succeeding in registration, so that the PGW identifies the logon message and records the addresses P CSCF that the UE succeeds in registration to the corresponding P CSCF of the P CSCF address lists successively through the PGW；When the UE is switched to the second network, the UE receives the addresses P CSCF that the UE that the PGW is returned succeeds in registration in the first network.The embodiment of the present invention can ensure that the addresses P CSCF that the UE is received after handover network are identical as the addresses P CSCF that the UE succeeds in registration before handover network, to make the UE continue to be anchored core net, and ensure the continuity for the business that the UE is currently carried out.
Description
Technical field
The present invention relates to field of communication technology, more particularly to a kind of method, UE and the PGW of anchoring core net.
Background technology
Anchoring refers to will be in the call routing to core network of user terminal (User Equipment, UE).Practical application
In, UE may be toggled between different networks, such as be switched between LTE and WiFi, and the business that corresponding UE is used can be
VoLTE (Voice over Long Term Evolution) switches between VoWiFi (Voice over WiFi).
Currently, UE can receive at least one Proxy Call Session Control Function (Proxy-Call in attachment
Session Control Funtion, P-CSCF) address, and therefrom an address P-CSCF is selected to be registered to use core
Heart network service, but packet data network gateway (Packet Data Network Gateway, PGW) does not know what UE succeeded in registration
The addresses P-CSCF, when UE is switched to other networks, the addresses P-CSCF that PGW returns to UE may be with UE before handover network
The addresses P-CSCF succeeded in registration are different, to keep the business that UE is currently carried out chaotic, influence UE and use core network service.
Invention content
The embodiment of the present invention is designed to provide a kind of method, UE and the PGW of anchoring core net, solves the prior art
For middle UE in handover network, the addresses P-CSCF that PGW is returned are different from the addresses P-CSCF that UE succeeds in registration before handover network,
To keep the business that UE is currently carried out chaotic, the problem of UE is using core network service is influenced.
In order to achieve the above object, the embodiment of the present invention provides a kind of method of anchoring core net, including：
When UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned；
The UE sends logon message until note to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Volume success, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration；
When the UE is switched to the second network, the UE receives the UE of the PGW returns in the first network
The addresses P-CSCF succeeded in registration.
The method that the embodiment of the present invention also provides another anchoring core net, including：
When UE adheres to first network, PGW returns to P-CSCF address lists to the UE；
The PGW identifies what the UE was sent to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Logon message, and record the addresses P-CSCF that the UE succeeds in registration；
When the UE is switched to the second network, the PGW returns to the UE to the UE and is registered in the first network
The addresses P-CSCF of work(.
The embodiment of the present invention also provides a kind of UE, including：
First receiving module, for when the UE adheres to first network, receiving the P-CSCF address columns that PGW is returned
Table；
Sending module, for sending registration report to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Text is until succeeding in registration, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration；
Second receiving module, for when the UE is switched to the second network, receiving the UE of the PGW returns in institute
State the addresses P-CSCF succeeded in registration in first network.
The embodiment of the present invention also provides a kind of PGW, including：
First sending module, for when UE adheres to first network, P-CSCF address lists to be returned to the UE；
Identification record module, for identification the UE through the PGW successively to the corresponding P- of the P-CSCF address lists
The logon message that CSCF is sent, and record the addresses P-CSCF that the UE succeeds in registration；
Second sending module returns to the UE described for when the UE is switched to the second network to the UE
The successful addresses P-CSCF of one network registry.
The embodiment of the present invention also provides a kind of computer storage media, and computer is stored in the computer storage media
Executable one or more programs, one or more of programs make the computer execute such as when being executed by the computer
A kind of method of anchoring core net of above-mentioned offer.
A technical solution in above-mentioned technical proposal has the following advantages that or advantageous effect：
When UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned；The UE is through the PGW
Logon message is sent until succeeding in registration to the corresponding P-CSCF of the P-CSCF address lists successively, so that the PGW is identified
The logon message simultaneously records the addresses P-CSCF that the UE succeeds in registration；When the UE is switched to the second network, the UE connects
Receive the addresses P-CSCF that the UE that the PGW is returned succeeds in registration in the first network.It can ensure the UE in this way
The addresses P-CSCF received after handover network are identical as the addresses P-CSCF that the UE succeeds in registration before handover network, to
Make the UE continue to be anchored core net, and ensures the continuity for the business that the UE is currently carried out.
Description of the drawings
Fig. 1 is the applicable schematic network structure of the embodiment of the present invention；
Fig. 2 is a kind of flow diagram of the method for anchoring core net provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Fig. 4 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Fig. 5 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Fig. 6 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Fig. 7 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Fig. 8 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Fig. 9 is the flow diagram of another method for being anchored core net provided in an embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram of UE provided in an embodiment of the present invention；
Figure 11 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention；
Figure 12 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention；
Figure 13 is a kind of structural schematic diagram of PGW provided in an embodiment of the present invention；
Figure 14 is the structural schematic diagram of another kind PGW provided in an embodiment of the present invention；
Figure 15 is the structural schematic diagram of another kind PGW provided in an embodiment of the present invention.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Referring to Fig. 1, Fig. 1 is the applicable schematic network structure of the embodiment of the present invention, as shown in Figure 1, including：UE、LTE
Network, WiFi network, MME, evolved node (Evolved Node B, eNodeB), ePDG, AAA entity, home subscribed services
Device (Home Subscriber Server, HSS), PGW, multiple P-CSCF and IMS core net, wherein UE can be mobile phone, put down
Plate computer (Tablet Personal Computer), laptop computer (Laptop Computer), personal digital assistant
(personal digital assistant, PDA), mobile Internet access device (Mobile Internet Device, MID) can
The terminal side equipments such as Wearable (Wearable Device), it should be noted that do not limit in embodiments of the present invention
The concrete type of UE is only switched as an example, in the embodiment of the present invention not with UE between LTE network and WiFi network in figure
The concrete type of UE handover networks is limited, UE is by wireless access points (Wireless Access Point, AP) and nothing
Lane controller (Wireless Access Point Controller, AC) accesses WiFi network, and eNodeB is in LTE network
Base station, core net is IMS in Fig. 5, it should be noted that does not limit the concrete type of core net in embodiments of the present invention.
As shown in Fig. 2, the embodiment of the present invention provides a kind of method of anchoring core net, the described method comprises the following steps：
Step S201, when UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned.
In the step, the purpose that the UE adheres to the first network is that the UE is allowed to be successfully accessed core net, described
PGW provides the functions such as session management and IP address distribution for the UE of core network access, when the UE adheres to the first network
When, the PGW can return to a P-CSCF address list to the UE, so that the UE is corresponded to the P-CSCF address lists
P-CSCF registered with core network access, wherein the core net can be IP multimedia subsystem (IP
Multimedia Subsystem, IMS), the IMS is a kind of completely new multimedia service form, disclosure satisfy that present end
Hold more novel, the more diversified multimedia service of client demand, central characteristics using Session Initiation Protocol and with access independence
Feature, P-CSCF is first entity that UE described in IMS systems is touched, and the P-CSCF is responsible for receiving the note of the UE
Volume request, so that the UE accesses the IMS network progress business by registering.
Step S202, the described UE sends registration to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Message is until succeeding in registration, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration.
In the step, the UE therefrom selects an address P-CSCF according to the P-CSCF address lists received
It is registered, logon message first can be sent to the PGW by the UE, and the logon message is identified in the PGW, and will
The logon message is transmitted to the corresponding P-CSCF in the addresses P-CSCF, if the P-CSCF returns to one by the PGW
The UE is given in a unsuccessful response of registration, then the UE continues that other addresses P-CSCF is selected to be registered, until the UE
Receive a response succeeded in registration by the PGW, after the UE succeeds in registration, can core network access enjoy business,
The PGW records the addresses P-CSCF that the UE succeeds in registration, in case the PGW is by institute after the UE handover networks
It states the addresses P-CSCF succeeded in registration and returns to the UE, to which the business for making the UE currently carry out will not be interrupted, ensure
The continuity of business.
Step S203, when the described UE is switched to the second network, the UE receives the UE that the PGW is returned described the
The addresses P-CSCF succeeded in registration in one network.
In the step, when the UE is switched to second network, the UE can be described to second network attachment
The UE of record can be returned to the UE by PGW in the addresses P-CSCF that the first network succeeds in registration, so that the UE
It can continue to be anchored former core net, the UE is protected in the corresponding P-CSCF in the addresses P-CSCF that the first network succeeds in registration
There is the logon message that the UE is sent, the UE does not have to register again, can be continuing with core network service, the UE described in this way
The addresses P-CSCF received after handover network and the addresses P-CSCF succeeded in registration before handover network are identical, so as to protect
Demonstrate,prove the continuity for the business that the UE is currently carried out.
In the present embodiment, when UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned；It is described
UE sends logon message until succeeding in registration to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW, so that
The PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration；The UE is switched to the second network
When, the UE receives the addresses P-CSCF that the UE that the PGW is returned succeeds in registration in the first network.It in this way can be with
With ensureing the addresses P-CSCF that the UE is received after handover network and the P-CSCF that the UE succeeds in registration before handover network
Location is identical, to make the UE continue to be anchored core net, and ensures the continuity for the business that the UE is currently carried out.
As shown in figure 3, the method that the embodiment of the present invention provides another anchoring core net, the method includes following steps
Suddenly：
Step S301, when UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned, wherein institute
It is long term evolution (Long Term Evolution, LTE) network to state first network.
In the step, the first network is LTE network, and when the UE adheres to the LTE network, the UE can be to
Mobile management entity (Mobility Management Entity, MME) sends attachment Attach message, and the MME receives institute
The PGW can be selected after stating Attach message, and is sent to the PGW and creates session connection request, the session connection is used for
The MME and the PGW are communicated, and the PGW can return to establishment after receiving the establishment session connection request to the MME
Session connection response, and P-CSCF address lists are sent to the MME, the MME again turns the P-CSCF address lists
The UE is issued, so that the UE is registered to the corresponding P-CSCF of the P-CSCF address lists with core network access.
Step S302, the described UE sends registration to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Message is until succeeding in registration, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration.
Step S303, when the described UE is switched to the second network, the UE is sent to the packet data gateway ePGD of evolution
Attach message, and carry out the tunnels internet key exchange IKE and internet safety protocol ipsec tunnel with the ePDG
Negotiation establish so that the UE and the ePDG carry out the information exchange of safety, wherein second network is wireless
(Wireless Fidelity, WiFi) network.
In the step, when the UE is switched to the WiFi network, the UE can be established with the ePDG tunnels IKE and
Ipsec tunnel carries out the communication of secret and safe to ensure the UE and the ePDG on IP agreement network.
Step S304, the described UE by ePDG to authentication and authorization charging (Authentication, Authorization,
Accounting, AAA) entity transmission authentication request.
In the step, the UE sends authentication request to the ePDG, and user identifier letter is carried in the authentication request
The authentication request is transmitted to the AAA entities by breath, the ePDG, so that after the AAA entities receive the authentication request,
Authentication and mandate are carried out to the UE.
Step S305, the described UE receives the certification success response that the AAA entities return by the ePDG, so that described
EPDG selects the PGW, and the ePDG and PGW is made to create session connection.
In the step, the AAA entities can be according to the authentication request of reception and user identity information to the identity of the UE
It is authenticated, the AAA entities can be recognized described again to the ePDG return authentications success response, the ePDG after certification success
Card success response is transmitted to the UE, and is sent to the PGW and create session connection request, and the PGW receives the establishment meeting
It talks about to return to the ePDG after connection request and creates session connection response, the session connection is for the ePDG and described
PGW is communicated.
Step S306, the described UE receives the UE that the PGW is returned by the ePDG and is noted in the first network
The successful addresses P-CSCF of volume.
In the step, the UE of record is sent to by the PGW in the addresses P-CSCF that the LTE network succeeds in registration
The UE is transmitted to the UE by the ePDG, the ePDG in the addresses P-CSCF that the LTE network succeeds in registration again, described
UE preserves the logon message that the UE is sent in the corresponding P-CSCF in the addresses P-CSCF that the LTE network succeeds in registration,
The UE does not have to register again, can be continuing with core network service, can ensure that the UE is being switched to the WiFi in this way
The addresses P-CSCF received after network are identical in the addresses P-CSCF that the LTE network succeeds in registration as in the UE, to make
The UE can continue to be anchored former core net, and ensure the continuity for the business that the UE is currently carried out.
The present embodiment can equally ensure that the addresses P-CSCF that the UE is received after handover network are switching with the UE
The addresses P-CSCF succeeded in registration before network are identical, to make the UE continue to be anchored core net, and ensure the UE when advance
The continuity of capable business.
As shown in figure 4, the method that the embodiment of the present invention provides another anchoring core net, the method includes following steps
Suddenly：
Step S401, when UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned, wherein institute
It is WiFi network to state first network.
In the step, the first network is WiFi network, when the UE adheres to the WiFi network, the UE meetings
Attach message first is sent to ePDG, and establishes the tunnels IKE and ipsec tunnel with the ePDG, to ensure the UE and described
EPDG carries out the communication of secret and safe on IP agreement network, and then the UE sends authentication request, the mirror to the ePDG
User identity information is carried in power request, the authentication request is transmitted to the AAA entities by the ePDG, and the AAA is real
After body receives the authentication request, authentication and mandate can be carried out to the UE, the AA entities can be to institute after certification success
EPDG return authentication success responses are stated, the certification success response is transmitted to the UE by the ePDG again, and described in selection
PGW sends to the PGW and creates session connection request, and the session connection is communicated for the ePDG and PGW,
After the PGW receives the establishment session connection request, P-CSCF address lists can be sent to the ePDG, the ePDG is again
The P-CSCF address lists are transmitted to the UE, for the UE to the corresponding P-CSCF of the P-CSCF address lists into
Row registration is with core network access.
Step S402, the described UE sends registration to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Message is until succeeding in registration, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration.
Step S403, when the described UE is switched to the second network, the UE sends attachment message to MME, so that the MME is selected
The PGW is selected, and the MME and PGW is made to create session connection, wherein second network is LTE network.
In the step, when the UE is switched to the LTE network, the UE can send Attach message to the MME,
The MME can select the PGW after receiving the Attach message, and sent to the PGW and create session connection request, described
PGW can return to establishment session connection response after receiving the establishment session connection request to the MME, and the session connection is used for
The MME and the PGW are communicated.
Step S404, the described UE receives the UE that the PGW is returned by the MME and is registered in the first network
The successful addresses P-CSCF.
In the step, the PGW sends the UE of record in the addresses P-CSCF that the WiFi network succeeds in registration
To the MME, the UE is transmitted to the UE, institute by the MME in the addresses P-CSCF that the WiFi network succeeds in registration again
It states UE and preserves the registration report that the UE is sent in the corresponding P-CSCF in the addresses P-CSCF that the first network succeeds in registration
Text, the UE do not have to register again, can be continuing with core network service, can ensure the UE described in being switched in this way
The addresses P-CSCF received after LTE network are identical in the addresses P-CSCF that the WiFi network succeeds in registration as the UE, to
Allow the UE to continue to be anchored former core net, and ensures the continuity for the business that the UE is currently carried out.
The present embodiment can equally ensure that the addresses P-CSCF that the UE is received after handover network are switching with the UE
The addresses P-CSCF succeeded in registration before network are identical, to make the UE continue to be anchored core net, and ensure the UE when advance
The continuity of capable business.
As shown in figure 5, the method that the embodiment of the present invention provides another anchoring core net, the method includes following steps
Suddenly：
Step S501, when UE adheres to first network, PGW returns to P-CSCF address lists to the UE.
Step S502, the described PGW identifies the UE through the PGW successively to the corresponding P- of the P-CSCF address lists
The logon message that CSCF is sent, and record the addresses P-CSCF that the UE succeeds in registration.
Step S503, when the described UE is switched to the second network, the PGW returns to the UE in first net to the UE
The addresses P-CSCF that network succeeds in registration.
It should be noted that the present embodiment is as PGW embodiments corresponding with embodiment shown in Fig. 2, it is specific
Embodiment may refer to the related description of embodiment shown in Fig. 2, to avoid repeated explanation, this embodiment is not repeated.
The present embodiment can ensure that after the UE handover networks, the PGW can accurately register the UE before handover network
The addresses P-CSCF of work(return to the UE, to make the UE continue to be anchored core net, and ensure what the UE was currently carried out
The continuity of business.
As shown in fig. 6, the method that the embodiment of the present invention provides another anchoring core net, the method includes following steps
Suddenly：
Step S601, when UE adheres to first network, PGW returns to P-CSCF address lists to the UE, wherein described the
One network is LTE network.
Step S602, the described PGW identifies the UE through the PGW successively to the corresponding P- of the P-CSCF address lists
The logon message that CSCF is sent, and record the addresses P-CSCF that the UE succeeds in registration.
Step S603, when the described UE is switched to the second network, the PGW receives the establishment session connection that ePDG is sent and asks
It asks, and is returned to the ePDG and create session connection response, wherein second network is WiFi network, and the ePDG is used for
The attachment message that the UE is sent is received, and carries out the negotiation foundation of the tunnels IKE and ipsec tunnel with the UE, so that described
The UE and ePDG carries out the information exchange of safety.
Step S604, the described PGW returns to the UE to the UE by the ePDG and succeeds in registration in the first network
The addresses P-CSCF.
It should be noted that the present embodiment is as corresponding PGW embodiments in embodiment as shown in figure 3, it is specific
Embodiment may refer to the related description of embodiment shown in Fig. 3, to avoid repeated explanation, this embodiment is not repeated.
The present embodiment can ensure that after the UE handover networks, the PGW can accurately register the UE before handover network
The addresses P-CSCF of work(return to the UE, to make the UE continue to be anchored core net, and ensure what the UE was currently carried out
The continuity of business.
As shown in fig. 7, the method that the embodiment of the present invention provides another anchoring core net, the method includes following steps
Suddenly：
Step S701, when UE adheres to first network, PGW returns to P-CSCF address lists to the UE, wherein described the
One network is WiFi network.
Step S702, the described PGW identifies the UE through the PGW successively to the corresponding P- of the P-CSCF address lists
The logon message that CSCF is sent, and record the addresses P-CSCF that the UE succeeds in registration.
Step S703, when the described UE is switched to the second network, the PGW receives the establishment session connection request that MME is sent,
And returned to the MME and create session connection response, wherein second network is LTE network, and the MME is for receiving institute
State the attachment message of UE transmissions.
Step S704, the described PGW returns to the UE to the UE by the MME and succeeds in registration in the first network
The addresses P-CSCF.
It should be noted that the present embodiment is as corresponding PGW embodiments in embodiment as shown in fig. 4, it is specific
Embodiment may refer to the related description of embodiment shown in Fig. 4, to avoid repeated explanation, this embodiment is not repeated.
The present embodiment can ensure that after the UE handover networks, the PGW can accurately register the UE before handover network
The addresses P-CSCF of work(return to the UE, to make the UE continue to be anchored core net, and ensure what the UE was currently carried out
The continuity of business.
Below in conjunction with Fig. 1, the embodiment introduced in above example is illustrated with multiple citings：
Example 1：
Using first network as LTE network, the second network is WiFi network for the citing, and referring to Fig. 1, the UE is to the LTE
Network attachment, and Attach message is sent to the MME, the MME is sent to the PGW creates session connection request, described
PGW is returned to the MME and is created session connection response and P-CSCF address lists, and the MME is again by the P-CSCF address columns
Table is transmitted to the UE, and the UE is successively to the corresponding P-CSCF registrations of the P-CSCF address lists, until succeeding in registration, institute
IMS core net can be anchored by stating UE, carry out IMS business, and the PGW records the addresses P-CSCF that the UE succeeds in registration.
When the UE is switched to the WiFi network, first, the UE and the ePDG carry out the Internet Key Exchange-
Security Association-initialization (IKE-Security Association-INITial, IKE_SA_INIT) request/IKE_SA_INIT
The interaction of response message pair establishes the tunnels IKE so as to consulted encryption algorithm.
Then, the UE sends the Internet Key Exchange-certification (IKE-Authentication, IKE_ to the ePDG
AUTH it) asks, so as to IKE_SA_INIT message described in certification, user identity information is carried in the IKE_AUTH requests.Institute
It states ePDG and sends Diameter Extensible Authentication Protocols request (Diameter Extensible to the AAA entities
Authentication Protocol Request, Diameter EAP Request, DER) message, it takes in the DER message
With user identity information, the AAA entities receive and send Diameter EAP responses to the ePDG after the DER message
(Diameter EAP Answer, DEA) message simultaneously initiates EAP Request, if not having user data in the AAA entities, just needs
Certifiede-mail protocol agreement (Authentication and Key are carried in the EAP Request to obtaining in HSS
Agreement, AKA) challenge, the ePDG is responded to UE transmissions IKE_AUTH and the EAP Request.
The UE sends IKE_AUTH requests to the ePDG again by certification, and generates EAP responses, and the EAP is rung
Carry AKA challenge responses in answering, the ePDG sends the EAP responses to the AAA entities, and the AAA entities are to described
EPDG sends EAP success messages, and user information is carried in the EAP success messages.The ePDG selections PGW, and to
The PGW, which is sent, creates session connection request, and the PGW is returned to the ePDG creates session connection response and PGW notes
The UE of record sends IKE_AUTH responses in the addresses P-CSCF that the LTE network succeeds in registration, the ePDG to the UE
With the EAP success messages, to notify UE certifications success.
Finally, the UE carries out integrality and authenticity verification, generates AUTH parameters by calculating, and send out to the ePDG
Send IKE_AUTH requests and the AUTH parameters, the ePDG is received after IKE_AUTH request through verification, and to described
UE forwards the UE of the PGW records in the addresses P-CSCF that the LTE network succeeds in registration, so that the UE can continue
Be anchored the IMS core net, the addresses P-CSCF that the UE described in this way is received after being switched to the WiFi network in the UE
It is identical in the addresses P-CSCF that the LTE network succeeds in registration, to ensure the continuity of business that the UE is currently carried out.Tool
Body flow can be as shown in Figure 8.
Example 2：
Using first network as WiFi network, the second network is LTE network for the citing, and referring to Fig. 1, the UE is to WiFi network
Adhere to, and carry out the interaction of IKE_SA_INIT requests/IKE_SA_INIT response messages pair with the ePDG, to establish IKE
Tunnel.
Then, the UE sends IKE_AUTH requests to the ePDG, and user's mark is carried in the IKE_AUTH requests
Know information.The ePDG sends DER message to the AAA entities, and user identity information is carried in the DER message, described
AAA entities send DEA message to the ePDG after receiving the DER message and initiate EAP Request, are carried in the EAP Request
There are AKA challenges, the ePDG to send IKE_AUTH responses and the EAP Request to the UE.
The UE sends IKE_AUTH requests to the ePDG again by certification, and generates EAP responses, and the EAP is rung
Carry AKA challenge responses in answering, the ePDG sends the EAP responses to the AAA entities, and the AAA entities are to described
EPDG sends EAP success messages, and user information is carried in the EAP success messages.The ePDG selections PGW, and to
The PGW, which is sent, creates session connection request, and the PGW is returned to the ePDG creates session connection response and the addresses P-CSCF
List, the ePDG send IKE_AUTH responses and EAP success messages to the UE, to notify the UE certifications success.
Finally, the UE carries out integrality and authenticity verification, generates AUTH parameters by calculating, and send out to the ePDG
Send IKE_AUTH requests and the AUTH parameters, the ePDG is received after IKE_AUTH request through verification, and to described
UE forwards the P-CSCF address lists, the UE to be registered successively to the corresponding P-CSCF of the P-CSCF address lists,
Until succeeding in registration, to carry out IMS business, the PGW records the addresses P-CSCF that the UE succeeds in registration.
When the UE is switched to the LTE network, the UE sends Attach message to the MME, and the MME is to institute
It states PGW and sends establishment session connection request, the PGW is recorded to MME returns establishment session connection response and the PGW
The UE is forwarded described in the PGW records in the addresses P-CSCF that the WiFi network succeeds in registration, the MME to the UE
UE is in the addresses P-CSCF that the WiFi network succeeds in registration, so that the UE can continue to be anchored the IMS core net, in this way
It addresses P-CSCF that the UE is received after being switched to the LTE network and succeeds in registration in the WiFi network in the UE
The addresses P-CSCF are identical, to ensure the continuity of business that the UE is currently carried out.Detailed process can be as shown in Figure 9.
As shown in Figure 10, the embodiment of the present invention provides a kind of UE100, including：
First receiving module 101, for when the UE100 adheres to first network, receiving the P-CSCF that PGW is returned
Location list；
Sending module 102, for sending registration to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Message is until succeeding in registration, so that the PGW identifies the logon message and with recording the P-CSCF that the UE100 succeeds in registration
Location；
Second receiving module 103, for when the UE100 is switched to the second network, receiving the described of the PGW returns
The addresses P-CSCF that UE100 succeeds in registration in the first network.
Optionally, when the first network is LTE network, and second network is WiFi network, as shown in figure 11, institute
Stating the second receiving module 103 includes：
First transmission unit 1031, for ePDG send attachment message, and with the ePDG carry out the tunnels IKE and
The negotiation of ipsec tunnel is established, so that the UE100 and ePDG carries out the information exchange of safety；
Second transmission unit 1032, for sending authentication request to AAA entities by the ePDG；
First receiving unit 1033, for receiving the certification success response that the AAA entities return by the ePDG, with
So that the ePDG is selected the PGW, and the ePDG and PGW is made to create session connection；
Second receiving unit 1034, for receiving the UE100 of the PGW returns by the ePDG described first
The addresses P-CSCF succeeded in registration in network.
Optionally, when the first network is WiFi network, and second network is LTE network, as shown in figure 12, institute
Stating the second receiving module 103 includes：
Third transmission unit 1035 so that the MME selects the PGW, and makes institute for sending attachment message to MME
It states the MME and PGW and creates session connection；
Third receiving unit 1036, for receiving the UE100 of the PGW returns by the MME described first
The addresses P-CSCF succeeded in registration in network.
It should be noted that above-mentioned UE can be the UE in Fig. 2-embodiments shown in Fig. 9, Fig. 2-Fig. 9 in the present embodiment
The arbitrary embodiment of UE in illustrated embodiment can be realized by the above-mentioned UE in the present embodiment, and reach identical
Advantageous effect, details are not described herein again.
As shown in figure 13, the embodiment of the present invention provides a kind of PGW130, including：
First sending module 131, for when UE adheres to first network, P-CSCF address lists to be returned to the UE；
Identification record module 132, for identification the UE through the PGW130 successively to the P-CSCF address lists pair
The logon message that the P-CSCF answered is sent, and record the addresses P-CSCF that the UE succeeds in registration；
Second sending module 133, for when the UE is switched to the second network, the UE to be returned to described to the UE
The addresses P-CSCF that first network succeeds in registration.
Optionally, when the first network is LTE network, and second network is WiFi network, as shown in figure 14, institute
Stating the second sending module 133 includes：
First receiving unit 1331, the establishment session connection request for receiving ePDG transmissions, and returned to the ePDG
Create session connection response, wherein the ePDG is used to receive the attachment message that the UE is sent, and carries out IKE with the UE
The negotiation of tunnel and ipsec tunnel is established, so that the UE and ePDG carries out the information exchange of safety；
First transmission unit 1332 is registered for returning to the UE to the UE by the ePDG in the first network
The successful addresses P-CSCF.
Optionally, when the first network is WiFi network, and second network is LTE network, as shown in figure 15, institute
Stating the second sending module 133 includes：
Second receiving unit 1333, the establishment session connection request for receiving MME transmissions, and return and create to the MME
Build session connection response, wherein the MME is used to receive the attachment message that the UE is sent；
Second transmission unit 1334 is noted to the UE returns UE in the first network for passing through the MME
The successful addresses P-CSCF of volume.
It should be noted that above-mentioned PGW can be the PGW in Fig. 2-embodiments shown in Fig. 9, Fig. 2-figure in the present embodiment
The arbitrary embodiment of PGW in 9 illustrated embodiments can be realized by the above-mentioned PGW in the present embodiment, and reach phase
Same advantageous effect, details are not described herein again.
It can be with one of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment method is
It is completed by the relevant hardware of program instruction, the program can be stored in a computer-readable medium, the program
When being executed, include the following steps：
When UE adheres to first network, the UE receives the P-CSCF address lists that PGW is returned；
The UE sends logon message until note to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Volume success, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration；
When the UE is switched to the second network, the UE receives the UE of the PGW returns in the first network
The addresses P-CSCF succeeded in registration.
Optionally, when the first network is LTE network, and second network is WiFi network, the UE receives institute
The addresses P-CSCF that the UE of PGW returns succeeds in registration in the first network are stated, including：
The UE sends attachment message to ePDG, and is built with the negotiation in the ePGD progress tunnels IKE and ipsec tunnel
It is vertical, so that the UE and ePDG carries out the information exchange of safety；
The UE sends authentication request by ePDG to AAA entities；
The UE receives the certification success response that the AAA entities return by the ePDG, so that the ePDG is selected
The PGW, and the ePDG and PGW is made to create session connection；
The UE receives the P- that the UE that the PGW is returned succeeds in registration in the first network by the ePDG
The addresses CSCF.
Optionally, when the first network is WiFi network, and second network is LTE network, the UE receives institute
The addresses P-CSCF that the UE of PGW returns succeeds in registration in the first network are stated, including：
The UE sends attachment message to MME, so that the MME selects the PGW, and the MME and PGW is made to create
Build session connection；
The UE receives the P- that the UE that the PGW is returned succeeds in registration in the first network by the MME
The addresses CSCF.
The storage medium, including：Read-only memory (Read-Only Memory, abbreviation ROM), random access memory
The various media that can store program code such as device (Random Access Memory, abbreviation RAM), magnetic disc or CD.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (12)
1. a kind of method of anchoring core net, which is characterized in that including：
When user terminal UE adheres to first network, the UE receives the agent call session that packet data network gateway PGW is returned
Control function P-CSCF address lists；
The UE sends logon message until registering to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Work(, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration；
When the UE is switched to the second network, the UE receives the UE that the PGW is returned and is registered in the first network
The successful addresses P-CSCF.
2. according to the method described in claim 1, it is characterized in that, when the first network be long term evolution LTE network, it is described
When second network is WiFi networks, the UE receives the UE that the PGW is returned and is registered in the first network
The addresses P-CSCF of work(, including：
The UE sends attachment message to the packet data gateway ePGD of evolution, and carries out the Internet Key Exchange with the ePDG
The negotiation of the tunnels agreement IKE and internet safety protocol ipsec tunnel is established, so that the UE and ePDG carries out safety
Information exchange；
The UE sends authentication request by ePDG to authentication and authorization charging AAA entities；
The UE receives the certification success response that the AAA entities return by the ePDG, so that described in ePDG selections
PGW, and the ePDG and PGW is made to create session connection；
The UE receives the P-CSCF that the UE that the PGW is returned succeeds in registration in the first network by the ePDG
Address.
3. according to the method described in claim 1, it is characterized in that, when the first network is WiFi network, second net
When network is LTE network, the UE is with receiving the P-CSCF that the UE that the PGW is returned succeeds in registration in the first network
Location, including：
The UE sends attachment message to mobile management entity MME so that the MME selects the PGW, and make the MME with
The PGW creates session connection；
The UE receives the P-CSCF that the UE that the PGW is returned succeeds in registration in the first network by the MME
Address.
4. a kind of method of anchoring core net, which is characterized in that including：
When UE adheres to first network, PGW returns to P-CSCF address lists to the UE；
The PGW identifies the registration that the UE is sent to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
Message, and record the addresses P-CSCF that the UE succeeds in registration；
When the UE is switched to the second network, the PGW returns to what the UE succeeded in registration in the first network to the UE
The addresses P-CSCF.
5. according to the method described in claim 4, it is characterized in that, when the first network is LTE network, second network
For WiFi network when, the PGW returns to the UE in the addresses P-CSCF that the first network succeeds in registration to the UE, packet
It includes：
The PGW receives the establishment session connection request that ePDG is sent, and is returned to the ePDG and create session connection response,
In, the ePDG is used to receive the attachment message that the UE is sent, and the association in the tunnels IKE and ipsec tunnel is carried out with the UE
Quotient establishes, so that the UE and ePDG carries out the information exchange of safety；
The PGW returns to the UE in the addresses P-CSCF that the first network succeeds in registration by the ePDG to the UE.
6. according to the method described in claim 4, it is characterized in that, when the first network is WiFi network, second net
When network is LTE network, the PGW returns to the UE in the addresses P-CSCF that the first network succeeds in registration, packet to the UE
It includes：
The PGW receives the establishment session connection request that MME is sent, and is returned to the MME and create session connection response,
In, the MME is used to receive the attachment message that the UE is sent；
The PGW returns to the addresses P-CSCF that the UE succeeds in registration in the first network by the MME to the UE.
7. a kind of UE, which is characterized in that including：
First receiving module, for when the UE adheres to first network, receiving the P-CSCF address lists that PGW is returned；
Sending module is straight for sending logon message to the corresponding P-CSCF of the P-CSCF address lists successively through the PGW
To succeeding in registration, so that the PGW identifies the logon message and records the addresses P-CSCF that the UE succeeds in registration；
Second receiving module, for when the UE is switched to the second network, receiving the UE that the PGW is returned described the
The addresses P-CSCF succeeded in registration in one network.
8. UE according to claim 7, which is characterized in that when the first network is LTE network, second network is
When WiFi network, second receiving module includes：
First transmission unit for sending attachment message to ePDG, and carries out the negotiation in the tunnels IKE and ipsec tunnel with ePDG
It establishes, so that the UE and ePDG carries out the information exchange of safety；
Second transmission unit, for sending authentication request to AAA entities by the ePDG；
First receiving unit, for receiving the certification success response that the AAA entities return by the ePDG, so that described
EPDG selects the PGW, and the ePDG and PGW is made to create session connection；
Second receiving unit is registered for receiving the UE that the PGW is returned by the ePDG in the first network
The successful addresses P-CSCF.
9. UE according to claim 7, which is characterized in that when the first network is WiFi network, second network
For LTE network when, second receiving module includes：
Third transmission unit so that the MME selects the PGW, and makes the MME and institute for sending attachment message to MME
It states PGW and creates session connection；
Third receiving unit is registered for receiving the UE that the PGW is returned by the MME in the first network
The addresses P-CSCF of work(.
10. a kind of PGW, which is characterized in that including：
First sending module, for when UE adheres to first network, P-CSCF address lists to be returned to the UE；
Identification record module, for identification the UE through the PGW successively to the corresponding P-CSCF of the P-CSCF address lists
The logon message of transmission, and record the addresses P-CSCF that the UE succeeds in registration；
Second sending module, for when the UE is switched to the second network, the UE to be returned in first net to the UE
The addresses P-CSCF that network succeeds in registration.
11. PGW according to claim 10, which is characterized in that when the first network is LTE network, second net
When network is WiFi network, second sending module includes：
First receiving unit, the establishment session connection request for receiving ePDG transmissions, and returned to the ePDG and create session
Connection reply, wherein the ePDG is used to receive the attachment message that the UE is sent, and with the UE carry out the tunnels IKE and
The negotiation of ipsec tunnel is established, so that the UE and ePDG carries out the information exchange of safety；
First transmission unit, for returning to the P- that the UE succeeds in registration in the first network to the UE by the ePDG
The addresses CSCF.
12. PGW according to claim 10, which is characterized in that when the first network is WiFi network, second net
When network is LTE network, second sending module includes：
Second receiving unit, the establishment session connection request for receiving MME transmissions, and returned to the MME and create session company
It scoops out and answers, wherein the MME is used to receive the attachment message that the UE is sent；
Second transmission unit, for returning to what the UE succeeded in registration in the first network to the UE by the MME
The addresses P-CSCF.
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