CN101448248B - Method for processing different user attach types by core network of evolved packet system - Google Patents
Method for processing different user attach types by core network of evolved packet system Download PDFInfo
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- CN101448248B CN101448248B CN2008100060350A CN200810006035A CN101448248B CN 101448248 B CN101448248 B CN 101448248B CN 2008100060350 A CN2008100060350 A CN 2008100060350A CN 200810006035 A CN200810006035 A CN 200810006035A CN 101448248 B CN101448248 B CN 101448248B
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Abstract
The invention discloses a method for processing different user attach types by a core network of an evolved packet system. The method comprises the following steps: a mobile management unit receives an attachment request message which contains attach type parameters and is transmitted from user equipment, and then transmits the parameters to a service gateway; and the service gateway transmits the request message containing the attach type parameters to a packet data network gateway; and the packet data network gateway newly assigns an IP address to the user equipment or returns the IP address which is originally used by the user equipment to the user equipment for continuous use according to the attach types which are indicated by the attach type parameters. In the method, a user attaches one attach type parameter to an MME when initiating an attach request, the MME attaches the parameter to an S-GW, and the S-GW attaches the parameter to a P-GW, therefore, different attach types canbe distinctively processed correspondingly.
Description
Technical field
The present invention relates in the communication technical field, a kind of grouping system core net of evolution (EvolvedPacket System is called for short EPS) is to the processing method of the different type of attachment of user.
Background technology
Third generation partner program (3rd Generation Partnership Project, abbreviation 3GPP) grouping system (the Evolved Packet System of evolution, be called for short EPS) by UTRAN (the Evolved Universal Terrestrial Radio Access Network of evolution, be called for short E-UTRAN), mobile management unit (Mobility Management Entity, be called for short MME), gateway (ServingGateway, be called for short S-GW), grouped data network gateway PDN GW (Packet Data NetworkGateWay, be called for short P-GW), policy control and charging rule functions (Policy Control andCharging Rules Function, be called for short PCRF), home subscriber server (Home SubscriberServer, be called for short HSS), 3GPP authentication and authorization charging server (being called for short the 3GPP aaa server), and other support nodes are formed.Wherein MME is responsible for the processing of mobile management, Non-Access Stratum signaling, user's chain of command related works such as the contextual management of mobile management; S-GW is the accessing gateway equipment that links to each other with E-UTRAN, transmits data between E-UTRAN and P-GW, and is responsible for pending datas such as paging are carried out buffer memory; P-GW then is the borde gateway of the grouping system EPS of 3GPP evolution and Packet Data Network's (Packet Data Network is called for short PDN) network, is responsible for the access of PDN, transmits function such as data between EPS and PDN.EPS supports to adopt between S-GW and the P-GW GPRS Tunnel Protocol (GPRS Tunnel Protocol is called for short GTP) or acts on behalf of mobile Internet Protocol sixth version agreement (Proxy Mobile Internet Protocol version 6 is called for short PMIPv6).
EPS supports the intercommunication with non-3GPP network.When the user was switched between non-3GPP and EPS network, P-GW was responsible for switching user data channel as non-3GPP and the internetwork anchor point of 3GPP, keeps the continuity of customer service.As shown in Figure 1, be the system architecture diagram that allows non-3GPP network insertion EPS.
As shown in Figure 2, be in the prior art, the attachment flow of subscriber equipment (User Equipment, be called for short UE) during from the 3GPP network insertion.UE issues MME with type of attachment (Attach type), and MME utilizes this information and other principles to select a P-GW, and S-GW is issued in the address of this P-GW.
This type of attachment has two kinds of situations: when the user starts shooting energized during from the 3GPP network insertion, the user need initiate start to the 3GPP network adhere to request (Attach type=Power on); When the user from non-3GPP network when the 3GPP network switches, the user need initiate be switched to the 3GPP network adhere to request (Attach type=handover).
For different user's adhesion conditions, core net gateway device S-GW, P-GW in the 3GPP network need carry out relevant treatment:
Start is adhered to: when adopting the PMIPv6 agreement between S-GW and the P-GW, S-GW is mutual, mutual with PCRF again with P-GW earlier; UE is given in the new distributing IP of P-GW address.
Switching is adhered to: the user from non-3GPP network when the 3GPP network switches, need to keep the continuity of customer service.When adopting the PMIPv6 agreement between S-GW and the P-GW, S-GW is mutual, mutual with P-GW again with PCRF earlier; P-GW does not switch the current tunnel that uses in non-3GPP inserts before switching is finished, and will return the IP address of UE use when original non-3GPP inserts simultaneously and continue to use for this UE.
Therefore 3GPP core net gateway device S-GW and P-GW need know that active user's type of attachment is to start shooting to adhere to or switch to adhere to, and adopt different processing methods, but above-mentioned core net gateway device S-GW and P-GW can't know which kind of adhering mode the user is in the prior art.
Summary of the invention
Technical problem to be solved by this invention provides the processing method of a kind of grouping system core net of evolution to the different type of attachment of user, core net gateway device S-GW and P-GW know which kind of adhering mode the user is, and according to different type of attachment differentiated treatment.
In order to solve the problems of the technologies described above, the invention provides the processing method of a kind of grouping system core net of evolution to the different type of attachment of user, it is characterized in that, mobile management unit sends to gateway to this parameter after receiving that subscriber equipment is sent the Attach Request message that includes the type of attachment parameter; Described gateway sends the request message that includes described type of attachment parameter to grouped data network gateway; Described grouped data network gateway is according to the type of attachment of described type of attachment parameter indication, and new distributing IP address is given subscriber equipment or returned the original IP address of using of subscriber equipment and continue to use for this subscriber equipment.
Method of the present invention, wherein, the type of attachment of described type of attachment parameter indication is adhered to or is switched for start and adheres to.
Wherein, the type of attachment parameter indication in the Attach Request message that subscriber equipment sends is that start is adhered to, and then this subscriber equipment is given in the new distributing IP of grouped data network gateway address; Perhaps
Type of attachment parameter indication in the Attach Request message that subscriber equipment sends is to switch to adhere to, then grouped data network gateway does not switch the current tunnel that uses in non-3GPP inserts, and returns the IP address of subscriber equipment use when original non-3GPP inserts simultaneously and continues to use for this subscriber equipment.
As claim 2 or 3 described methods, it is characterized in that, adopt the GTP agreement between gateway and the grouped data network gateway, described gateway includes described type of attachment parameter in the request message that grouped data network gateway sends, comprise the steps:
Gateway is issued grouped data network gateway with the type of attachment parameter in setting up the default bearer request message.
Wherein, this method is divided into following steps:
When described subscriber equipment is started shooting from network insertion, send the Attach Request message that comprises the type of attachment parameter to mobile management unit, it is that start is adhered to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received described Attach Request message, finish after authentication and position upgrade, set up the default bearer request message to the gateway initiation, described foundation comprises described type of attachment parameter in the default bearer request message;
Gateway receive described set up the default bearer request message after, initiate to set up the default bearer request to grouped data network gateway, described foundation comprises described type of attachment parameter in the bearing request message;
After grouped data network gateway is received described bearing request message, judging described type of attachment parameter adheres to for start, then take place corresponding mutual with policy control and charging rule functions, initiate to set up the default bearer response to gateway, comprise the newly assigned IP of promising user address in this message;
Continue to finish the follow-up flow process of initially adhering to, set up the user default carrying.
Wherein, this method is divided into following steps:
Described subscriber equipment when the 3GPP network switches, sends the Attach Request message that comprise type of attachment parameter to mobile management unit from non-3GPP network, and it is to switch to adhere to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received described Attach Request message, finish after authentication and position upgrade, set up the default bearer request message to the gateway initiation, described foundation comprises described type of attachment parameter in the default bearer request message;
After gateway is received described default bearer request message, initiate to set up the default bearer request message, comprise described type of attachment parameter in the described default bearer request message to grouped data network gateway;
After grouped data network gateway is received described bearing request message, judging described type of attachment parameter adheres to for switching, then the tunnel of current user equipment in the non-3 GPP access network network do not switched to the 3GPP access network, grouped data network gateway and policy control and charging rule functions take place corresponding mutual, grouped data network gateway initiates to set up the default bearer response to gateway, is included in to be user's IP address allocated in the non-3 GPP access network network in this message;
Continue to finish and switch the follow-up flow process of adhering to, set up the user default carrying.
Method of the present invention, wherein, adopt the PMIPv6 agreement between gateway and the grouped data network gateway, described gateway includes described type of attachment parameter in the request message that grouped data network gateway sends, comprise the steps: that gateway is according to this type of attachment parameter judgement
If start is adhered to, then gateway is mutual with grouped data network gateway earlier, in the Binding Update request message this type of attachment parameter is issued grouped data network gateway, and is mutual with policy control and charging rule functions PCRF again;
Adhere to if switch, then gateway is mutual, mutual with grouped data network gateway again with policy control and charging rule functions earlier, in the Binding Update request message this type of attachment parameter is issued grouped data network gateway.
Wherein, this method is divided into following steps:
Described subscriber equipment sends the Attach Request message that comprises the type of attachment parameter to mobile management unit when starting shooting from the 3GPP network insertion, it is that start is adhered to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received the Attach Request message that subscriber equipment sends, finish after authentication and position upgrade, set up the default bearer request message to the gateway initiation, described foundation includes described type of attachment parameter in the default bearer request message;
Gateway receive described set up the default bearer request message after, judge that described type of attachment parameter is that start is adhered to, then initiate the agent binding update request message, include described type of attachment parameter in the described agent binding update request message to grouped data network gateway;
After grouped data network gateway is received described agent binding update request message, judging described type of attachment parameter adheres to for start, then take place mutual with policy control and charging rule functions, initiate proxy binding acknowledgment messages to gateway, comprise the newly assigned IP of promising user address in this message;
Gateway is initiated mutual request to policy control and charging rule functions;
Continue to finish the follow-up flow process of initially adhering to, set up the user default carrying.
Wherein, this method is divided into following steps:
Described subscriber equipment when the 3GPP network switches, sends the Attach Request message that comprise type of attachment parameter to mobile management unit from non-3GPP network, and it is to switch to adhere to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received the Attach Request message that subscriber equipment sends, finish after authentication and position upgrade, set up the default bearer request message, include described type of attachment parameter in the message to the gateway initiation;
After gateway is received described default bearer request message, judge that described type of attachment parameter is to switch to adhere to, then take place mutual with policy control and charging rule functions, and set up default bearer to the mobile management unit transmission and confirm, set up the wireless and access bearer between subscriber equipment and the gateway, gateway sends the agent binding update request message to grouped data network gateway;
After grouped data network gateway is received described agent binding update request message, judge that the type of attachment parameter in the described message is to switch to adhere to, then the tunnel of current user equipment in the non-3 GPP access network network do not switched to the 3GPP access network, take place mutual with policy control and charging rule functions, and initiate agent binding to gateway and confirm, being included in this message in the non-3 GPP access network network has been user's IP address allocated;
Continue to finish and switch the follow-up flow process of adhering to, set up the user default carrying.
The method of the invention, the user has a type of attachment (Attachtype) parameter and gives MME when initiating to adhere to request, and MME brings S-GW with this parameter, and bringing P-GW with this parameter, different type of attachment can be by corresponding differentiated treatment again for S-GW.
Description of drawings
Fig. 1 is an EPS Organization Chart in the prior art.
Fig. 2 is the attachment flow when UE is from the 3GPP network insertion in the prior art.
Fig. 3 is the flow chart of embodiment 1.
Fig. 4 is the flow chart of embodiment 2.
Fig. 5 is the flow chart of embodiment 3.
Fig. 6 is the flow chart of embodiment 4.
Embodiment
The present invention proposes a kind of when the user when 3GPP inserts, the EPS core net is to the processing method of the different type of attachment of user, promptly, the user gives MME when having an Attach type (type of attachment) parameter when the 3GPP access network initiates to adhere to request, MME brings this parameter core net gateway device (S-GW subsequently, P-GW), gateway device carries out respective handling to different type of attachment.
According to adopting different agreements between S-GW and the P-GW, can be divided into following two kinds of situations:
First kind of situation, when adopting the GTP agreement between S-GW and the P-GW, method of the present invention comprises the steps:
1, MME receives Attach type (type of attachment) parameter that UE sends, and this parameter is issued S-GW.
2, S-GW issues P-GW with Attach type in setting up the default bearer request.
3, P-GW is according to this carrying request decision, if start is adhered to, UE is given in just new distributing IP address; Adhere to if switch, P-GW does not switch the current tunnel that uses in non-3GPP inserts before switching is finished, and returns the IP address of UE use when original non-3GPP inserts simultaneously and continues to use for this UE.Further be described in detail below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 3, what present embodiment was described is that the UE start inserts the 3GPP access network, promptly adhere to request and adhere to request (Attach type=Power on) for start, and what adopt between S-GW and the P-GW is the GTP agreement.The flow chart of present embodiment, concrete steps are described below:
302, UE initiates to adhere to request, and the Attachtype parameter that comprises in the Attach Request message that MME sends is Power on, is used to indicate this to adhere to request and adheres to request for start.
304, carry out access authentication of user between UE, MME and the HSS/AAA.
306, MME initiates the position renewal to HSS/AAA, and user contracting data is sent to MME.
308, MME initiates to set up the default bearer request to S-GW, and comprising Attach type is Poweron.
310, S-GW is to use the GTP agreement between Power on and S-GW and the P-GW according to current Attach type, initiates to set up the default bearer request to P-GW, and comprising Attach type is Poweron.
312, corresponding mutual (can be undertaken by existing procedure here) takes place in P-GW and PCRF.
314, P-GW initiates to set up the default bearer response to S-GW, and P-GW is Power on according to Attach type, is included as user's IP address allocated in this message.
316, continue to finish the follow-up flow process of initially adhering to, set up the user default carrying.
Embodiment 2
What present embodiment was described is that UE switches to the 3GPP access network from the non-3 GPP access network network, promptly adhere to request and adhere to request (Attach type=handover) for switching, and what adopt between S-GW and the P-GW is the GTP agreement.The flow chart of present embodiment as shown in Figure 4, concrete steps are described below:
402, UE initiates to adhere to request, and the Attachtype parameter that comprises in the Attach Request message that MME sends is handover, is used to indicate this to adhere to request and adheres to request for switching.
404, carry out access authentication of user between UE, MME and the HSS/AAA.
406, MME initiates the position renewal to HSS/AAA, and user contracting data is sent to MME.
408, MME initiates to set up the default bearer request to S-GW, and the Attach type parameter that comprises is handover.
410, S-GW is to use the GTP agreement between handover and S-GW and the P-GW according to current Attach type, initiates to set up the default bearer request to P-GW, and comprising Attach type is handover.P-GW receives that this message is handover according to Attach type afterwards, and decision does not switch to the 3GPP access network with the tunnel of current UE in the non-3 GPP access network network.
412, P-GW and PCRF take place corresponding mutual.
414, P-GW initiates to set up the default bearer response to S-GW, and P-GW is handover according to Attach type, is included in to be user's IP address allocated in the non-3 GPP access network network in this message.
416, continue to finish the follow-up flow process that switching is adhered to, set up the user default carrying.
Second kind of situation, when adopting the PMIPv6 agreement between S-GW and the P-GW, method of the present invention comprises the steps:
1, MME receives Attach type (type of attachment) parameter that UE sends, and this parameter is issued S-GW.
2, S-GW judges according to this Attach type, if start is adhered to, S-GW is mutual with P-GW earlier, in the Binding Update request Attach type is issued P-GW, and is mutual with PCRF again; Adhere to if switch, S-GW is mutual, mutual with P-GW again with PCRF earlier, in the Binding Update request Attach type is issued P-GW.
3, P-GW judges according to this Attach type, if start is adhered to, just needs new distributing IP address to give UE; Adhere to if switch, P-GW does not switch the current tunnel that uses in non-3GPP inserts before switching is finished, and will return the IP address of UE use when original non-3GPP inserts simultaneously and continue to use for this UE.Further be described in detail below in conjunction with accompanying drawing.
Embodiment 3
What present embodiment was described is that the UE start inserts the 3GPP access network, promptly adhere to request and adhere to request (Attach type=Power on) for start, and what adopt between S-GW and the P-GW is the PMIPv6 agreement.The flow chart of present embodiment as shown in Figure 5, concrete steps are described below:
502, UE initiates to adhere to request, and the Attachtype parameter that comprises in the Attach Request message that MME sends is Power on, is used to indicate this to adhere to request and adheres to request for start.
504, carry out access authentication of user between UE, MME and the HSS/AAA.
506, MME initiates the position renewal to HSS/AAA, and user contracting data is sent to MME.
508, MME initiates to set up the default bearer request to S-GW, and comprising Attach type is Poweron.
510, S-GW judges current Attach type and uses the PMIPv6 agreement between Power on and S-GW and the P-GW, then initiates agent binding update to P-GW, and Attach type is issued P-GW.
512, P-GW and PCRF take place corresponding mutual.
514, P-GW initiates the agent binding affirmation to S-GW, is included as the newly assigned IP of user address in this message.
516, S-GW initiates mutual request to PCRF.
518, continue to finish the follow-up flow process of initially adhering to, set up the user default carrying.
Embodiment 4
What present embodiment was described is that UE switches to the 3GPP access network from the non-3 GPP access network network, promptly adhere to request and adhere to request (Attach type=handover) for switching, and what adopt between S-GW and the P-GW is the PMIPv6 agreement.The flow chart of present embodiment as shown in Figure 6, concrete steps are described below:
602, UE initiates to adhere to request, and the Attachtype parameter that comprises in the Attach Request message that MME sends is handover, is used to indicate this to adhere to request and adheres to request for switching.
604, carry out access authentication of user between UE, MME and the HSS/AAA.
606, MME initiates the position renewal to HSS/AAA, and user contracting data is sent to MME.
608, MME initiates to set up the default bearer request to S-GW, and comprising Attach type is handover.
610, S-GW judges current Attach type and uses the PMIPv6 agreement between handover and S-GW and the P-GW, then takes place corresponding mutual with PCRF.
612, S-GW sends to MME and sets up the default bearer affirmation.
614, the wireless and access bearer between UE and the S-GW is set up.
616, S-GW sends agent binding update to P-GW.P-GW receives that this message is handover according to Attach type afterwards, and decision does not switch to the 3GPP access network with the tunnel of current UE in the non-3 GPP access network network.
618, P-GW and PCRF take place corresponding mutual.
620, P-GW initiates the agent binding affirmation to S-GW, and P-GW is handover according to Attach type, is included in to be user's IP address allocated in the non-3 GPP access network network in this message.
622, continue to finish the follow-up flow process that switching is adhered to, set up the user default carrying.
Claims (9)
1. the grouping system core net of evolution is characterized in that to the processing method of the different type of attachment of user mobile management unit sends to gateway to this parameter after receiving that subscriber equipment is sent the Attach Request message that includes the type of attachment parameter; Described gateway sends the request message that includes described type of attachment parameter to grouped data network gateway; Described grouped data network gateway is according to the type of attachment of described type of attachment parameter indication, and new distributing IP address is given subscriber equipment or returned the original IP address of using of subscriber equipment and continue to use for this subscriber equipment.
2. the method for claim 1 is characterized in that, the type of attachment of described type of attachment parameter indication is adhered to or switched for start and adheres to.
3. method as claimed in claim 2 is characterized in that,
Type of attachment parameter indication in the Attach Request message that subscriber equipment sends is that start is adhered to, and then this subscriber equipment is given in the new distributing IP of grouped data network gateway address; Perhaps
Type of attachment parameter indication in the Attach Request message that subscriber equipment sends is to switch to adhere to, then grouped data network gateway does not switch the current tunnel that uses in non-3GPP inserts, and returns the IP address of subscriber equipment use when original non-3GPP inserts simultaneously and continues to use for this subscriber equipment.
4. as claim 2 or 3 described methods, it is characterized in that, adopt the GTP agreement between gateway and the grouped data network gateway, described gateway includes described type of attachment parameter in the request message that grouped data network gateway sends, comprise the steps:
Gateway is issued grouped data network gateway with the type of attachment parameter in setting up the default bearer request message.
5. method as claimed in claim 4 is characterized in that, this method is divided into following steps:
When described subscriber equipment is started shooting from network insertion, send the Attach Request message that comprises the type of attachment parameter to mobile management unit, it is that start is adhered to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received described Attach Request message, finish after authentication and position upgrade, set up the default bearer request message to the gateway initiation, described foundation comprises described type of attachment parameter in the default bearer request message;
Gateway receive described set up the default bearer request message after, initiate to set up the default bearer request to grouped data network gateway, described foundation comprises described type of attachment parameter in the default bearer request message;
After grouped data network gateway is received described bearing request message, judging described type of attachment parameter adheres to for start, then take place corresponding mutual with policy control and charging rule functions, initiate to set up the default bearer response to gateway, comprise the newly assigned IP of promising user address in this response;
Continue to finish the follow-up flow process of initially adhering to, set up the user default carrying.
6. method as claimed in claim 4 is characterized in that, this method is divided into following steps:
Described subscriber equipment when the 3GPP network switches, sends the Attach Request message that comprise type of attachment parameter to mobile management unit from non-3GPP network, and it is to switch to adhere to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received described Attach Request message, finish after authentication and position upgrade, set up the default bearer request message to the gateway initiation, described foundation comprises described type of attachment parameter in the default bearer request message;
After gateway is received described default bearer request message, initiate to set up the default bearer request message, comprise described type of attachment parameter in the described default bearer request message to grouped data network gateway;
After grouped data network gateway is received described bearing request message, judging described type of attachment parameter adheres to for switching, then the tunnel of current user equipment in the non-3 GPP access network network do not switched to the 3GPP access network, grouped data network gateway and policy control and charging rule functions take place corresponding mutual, grouped data network gateway initiates to set up the default bearer response to gateway, is included in to be user's IP address allocated in the non-3 GPP access network network in this response;
Continue to finish and switch the follow-up flow process of adhering to, set up the user default carrying.
7. as claim 2 or 3 described methods, it is characterized in that, adopt the PMIPv6 agreement between gateway and the grouped data network gateway, described gateway includes described type of attachment parameter in the request message that grouped data network gateway sends, comprise the steps: that gateway is according to this type of attachment parameter judgement
If start is adhered to, then gateway is mutual with grouped data network gateway earlier, in the Binding Update request message this type of attachment parameter is issued grouped data network gateway, and is mutual with policy control and charging rule functions PCRF again;
Adhere to if switch, then gateway is mutual, mutual with grouped data network gateway again with policy control and charging rule functions earlier, in the Binding Update request message this type of attachment parameter is issued grouped data network gateway.
8. method as claimed in claim 7 is characterized in that, this method is divided into following steps:
Described subscriber equipment sends the Attach Request message that comprises the type of attachment parameter to mobile management unit when starting shooting from the 3GPP network insertion, it is that start is adhered to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received the Attach Request message that subscriber equipment sends, finish after authentication and position upgrade, set up the default bearer request message to the gateway initiation, described foundation includes described type of attachment parameter in the default bearer request message;
Gateway receive described set up the default bearer request message after, judge that described type of attachment parameter is that start is adhered to, then initiate the agent binding update request message, include described type of attachment parameter in the described agent binding update request message to grouped data network gateway;
After grouped data network gateway is received described agent binding update request message, judging described type of attachment parameter adheres to for start, then take place mutual with policy control and charging rule functions, initiate proxy binding acknowledgment messages to gateway, comprise the newly assigned IP of promising user address in this proxy binding acknowledgment messages;
Gateway is initiated mutual request to policy control and charging rule functions;
Continue to finish the follow-up flow process of initially adhering to, set up the user default carrying.
9. method as claimed in claim 7 is characterized in that, this method is divided into following steps:
Described subscriber equipment when the 3GPP network switches, sends the Attach Request message that comprise type of attachment parameter to mobile management unit from non-3GPP network, and it is to switch to adhere to that the type of attachment parameter in the message indicates this to adhere to request;
After described mobile management unit is received the Attach Request message that subscriber equipment sends, finish after authentication and position upgrade, set up the default bearer request message, include described type of attachment parameter in the message to the gateway initiation;
After gateway is received described default bearer request message, judge that described type of attachment parameter is to switch to adhere to, then take place mutual with policy control and charging rule functions, and set up default bearer to the mobile management unit transmission and confirm, set up the wireless and access bearer between subscriber equipment and the gateway, gateway sends the agent binding update request message to grouped data network gateway;
After grouped data network gateway is received described agent binding update request message, judge that the type of attachment parameter in the described message is to switch to adhere to, then the tunnel of current user equipment in the non-3 GPP access network network do not switched to the 3GPP access network, take place mutual with policy control and charging rule functions, and to gateway initiation proxy binding acknowledgment messages, being included in this proxy binding acknowledgment messages in the non-3 GPP access network network has been user's IP address allocated;
Continue to finish and switch the follow-up flow process of adhering to, set up the user default carrying.
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