CN101252782A - Method for obtaining terminal roam access mode - Google Patents
Method for obtaining terminal roam access mode Download PDFInfo
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- CN101252782A CN101252782A CNA2008100901869A CN200810090186A CN101252782A CN 101252782 A CN101252782 A CN 101252782A CN A2008100901869 A CNA2008100901869 A CN A2008100901869A CN 200810090186 A CN200810090186 A CN 200810090186A CN 101252782 A CN101252782 A CN 101252782A
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Abstract
The invention provides a method for acquiring a terminal roaming access way. A terminal UE is accessed into a PDN network in 3GPP and initiates IP-CAN session service. The method comprises the following steps: an MME assigns P-GW for IP-CAN session, and preserves the PLMN ID information of the P-GW; the MME sends a loading request message to S-GW, and the preserved PLMN ID information of the P-GW is carried in the message; after receiving the message, the S-GW acquires the terminal roaming access way according to the comparison between the PLMN ID information of the P-GW and the PLMN ID information of the S-GW, and accomplishes the IP-CAN session establishment flow. The method of the invention ensures the loading binding and event reporting function entity resided in a service gateway or an access gateway to acquire the terminal roaming access way.
Description
Technical field
The present invention relates to field of wireless, relate in particular to the method that a kind of bearing binding and event reporting function entity are known terminal roam access mode.
Background technology
Grouping system (the EPS of 3GPP evolution, the grouping system of Evolved Packet System evolution) system architecture diagram as shown in Figure 1, the EPS system is by the UTRAN (E-UTRAN of evolution, the land wireless universal access network of EvolvedUniversal Terrestrial Radio Access Network evolution), MME (mobile management unit, Mobility Management Entity), S-GW (gateway, Serving Gateway), PDN GW (P-GW, Packet Data Network Gateway, grouped data network gateway), HSS (home subscriber server, Home Subscriber Server), 3GPP aaa server (3GPP authentication and authorization charging server), PCRF (Policy and Charging RulesFunction, "Policy and Charging Rules Function) and other support nodes form.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 PDN GW, and is responsible for pending datas such as paging are carried out buffer memory.
P-GW then is the grouping system (EPS, Evolved Packet System) of 3GPP evolution and the borde gateway of PDN (Packet Data Network) network, is responsible for the access of PDN, transmits function such as data between EPS and PDN.
PCRF is the "Policy and Charging Rules Function entity, and it obtains business information by Rx interface and operator's IP operation network interface, it links to each other another side with gateway device in the network by S7/S7a/S7c, be responsible for initiating the foundation of IP carrying, guarantee the QoS of business datum, and the control of chargeing.
EPS supports the intercommunication with non-3GPP network, passes through the S2a/b interface with the intercommunication of non-3GPP network and realizes that P-GW is as 3GPP and the internetwork anchor point of non-3GPP.Wherein non-3 GPP system is divided into the non-3GPP IP access of trusted and trustless non-3GPP IP access.The non-3GPP IP of trusted inserts can be directly by S2a and P-GW interface; Trustless non-3GPP IP inserts to be needed to link to each other with P-GW through ePDG (Evolved Packet Data Gateway, the data gateway of evolution), and the interface between ePDG and P-GW is S2b.
In traditional 3GPP network, strategy and charge execution function (PCEF, Policy and chargingenforcement function) exists only among the P-GW, PCRF needs only the control that can finish all functions with the P-GW interface, passes through S7 interface (see figure 1) exchange message between PCRF and P-GW.But when the user uses 3GPP to insert, and the interface between P-GW and S-GW walks PMIP (Proxy Mobile IP agreement) based on the S5 interface, and the policy enforcement function part in the PCEF function also is present in S-GW; Or when the user used non-3GPP trusty to insert, the policy enforcement function part in the PCEF function also was present in the non-3 GPP access network trusty Central Shanxi Plain.The entity that resides in these gateways is called as bearing binding and reporting events functional entity (BBERF, Bearer Binding and EventReporting Function).When the user uses 3GPP to insert, pass through S7c interface exchange message between S-GW and the PCRF; When user non-3GPP trusty inserted, the trusted non-3 GPP access network closed by S2a and PCRF interactive information (as Fig. 1).
When the user roams into visit ground, can use local route (Home Routed) or local transporting (LBO, Local BreakOut) dual mode to insert the PDN network.Adopt the mode (as shown in Figure 2) of Home Routed, the user uses the P-GW of home network to insert the PDN network; Adopt LBO mode (as shown in Figure 3), the user uses the P-GW on visit ground to insert the PDN network.Both differences be exactly P-GW be at visited network or home network.Under the roaming scence, in order to allow S9 interface (interface between vPCRF and the hPCRF) simpler, when the user uses Home Routed mode to insert, the BBERF/PCEF of roaming place directly and hPCRF carry out interacting message, different without S9 interface (as shown in Figure 2) and original technology); When the user uses Local Breakout mode to insert, the BBERF/PCEF of roaming place directly and vPCRF carry out interacting message, mutual use S9 interface (as shown in Figure 3, consistent) between vPCRF (visit ground PCRF) and the hPCRF (ownership place PCRF) with original technology.When the user initiates IP-CAN (IP Connectivity AccessNetwork, IP merges Access Network) session or switch (switches between 3GPP net, 3GPP inserts to the non-3GPP of trusted and inserts switching, the non-3GPP of trusted inserts to 3GPP and inserts switching) time, BBERF/PCEF need initiate request PCC (Policy and charging control) strategy to PCRF, use the different of Home Routed and Local Breakout mode according to the user, BBERF/PCEF is the destination-address difference that request message is filled in: mode inserts if the user uses Home Routed, and the destination domain name of the request message that BBERF/PCEF fills in is home network (with the hPCRF interacting message of home network); If Local Breakout mode, the destination domain name of the request message that BBERF/PCEF fills in is access zone network (with the vPCRF interacting message of access zone network).For PCEF, the clear own residing position of PCEF (PCEF resides in P-GW) also just knows that it still is that Local Breakout mode inserts that the user uses Home Routed very much certainly.And for BBERF (residing in S-GW or non-3 GPP access network trusty closes), BBERF can't learn that it still is that Local Breakout mode inserts that the user adopts Home Routed.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of knowing terminal roam access mode, makes the bearing binding and the reporting events functional entity that reside in gateway or IAD know terminal roam access mode.
In order to address the above problem, the invention provides a kind of method of knowing terminal roam access mode, terminal UE is at 3GPP accessing group data network PDN network and initiate IP fusion Access Network IP-CAN session service, and this method may further comprise the steps:
A1: mobile management unit MME is described IP-CAN session assigns packet data network gateway P-GW, and preserves the PLMN sign PLMN id information of this P-GW;
B1:MME sends bearing request message to gateway S-GW, has the PLMN id information of this P-GW of preservation in the message;
After C1:S-GW receives this message, compare, know terminal roam access mode, and finish the IP-CAN session and set up flow process according to the PLMN id information of this P-GW and the PLMN ID of oneself.
Further, if described IP-CAN session service switches between 3GPP inserts, and MME changes, and is then further comprising the steps of behind the step C1:
D1: old MME sends authentication request to new MME, and old MME sends authentication response to new MME, carries the PLMN id information into the P-GW that gives IP-CAN session selection in the message;
E1: new MME preserves the PLMN id information of this P-GW according to the information of receiving;
F1: new MME sends to S-GW and creates the default bearing request message, the relevant information that has this P-GW of preservation in the message after S-GW receives this message, compares according to the PLMN id information of this P-GW and the PLMN ID of oneself, know terminal roam access mode, set up the session flow process to finish.
Further, if described IP-CAN session service switches between 3GPP inserts, and S-GW changes, then further comprising the steps of behind the step C1: MME sends to new S-GW and creates the default bearing request message, carry the PLMN id information of the P-GW of described IP-CAN session in the message, after new S-GW receives this message, compare according to the PLMN id information of this P-GW and the PLMN ID of oneself, know terminal roam access mode, set up the session flow process to finish.
Further, MME sends response message to HSS after described IP-CAN session distributes P-GW in the steps A 1, carries the PLMN id information of the P-GW of selection in the message, after HSS receives response message, preserves the PLMN id information of the P-GW of this IP-CAN session selection; If UE inserts when switching to non-3GPP trusty and inserting from 3GPP, and is then further comprising the steps of behind step C1 or the F1:
G1: non-3 GPP access network trusty closes to aaa server initiates authentication;
The H1:AAA server is judged authentication success, obtains the PLMN id information of the P-GW of this IP-CAN session to HSS;
After I1:AAA receives message, preserve the PLMN id information of the P-GW of this IP-CAN session;
The J1:AAA server sends to non-3 GPP access network trusty pass with the relevant information of P-GW, non-3 GPP access network trusty compares according to the PLMN id information of this P-GW and the PLMN ID of oneself after closing and receiving this message, know terminal roam access mode, and finish the switching access process.
Further, the access way of terminal roaming refers to local routing mode or local break-out mode, P-GW or non-3 GPP access network trusty close according to the PLMN id information of this P-GW in the message of receiving and the PLMN ID of oneself and compare, if comparative result is identical, judge that then UE is to use the local routing mode to insert; If different, judge that UE is to use the local break-out mode to insert.
For solving the problems of the technologies described above, the present invention also provides a kind of method of knowing terminal roam access mode, and when terminal inserted and initiates the IP-CAN session at non-3GPP trusty, this method may further comprise the steps:
After the success of A2:AAA server authentication, being chosen as the IP-CAN session by aaa server selects, the PLMN id information that sends P-GW closes to non-3 GPP access network trusty, or the related news of aaa server transmission P-GW, is closed by non-3 GPP access network trusty and selects P-GW;
B2: non-3 GPP access network trusty closes according to the PLMN id information of this P-GW and own PLMN ID comparison, knows terminal roam access mode and finishes session and set up flow process.
Further, aaa server sends to the information that comprises APN and whether allow to insert at roaming place selection P-GW in the message of non-3 GPP access network trusty pass in the steps A 2, non-3 GPP access network trusty closes according to receiving message, for P-GW is selected in this IP-CAN session.
Further, further comprising the steps of behind the step B2:
C2: non-3 GPP access network trusty closes the address information of having learnt P-GW, sends agent binding update messages to P-GW;
After D2:P-GW receives message, send renewal PDN GW address message, have the PLMN ID of this P-GW in the message to aaa server;
After the E2:AAA server is received message, preserve the PLMNID information of the P-GW of this IP-CAN session selection;
The F2:AAA server sends message to HSS, has the PLMN id information of this P-GW in the message, informs that HSS preserves the PLMN id information of the P-GW of this IP-CAN selection;
After G2:HSS receives message, preserve the PLMN ID of the P-GW of this IP-CAN session selection;
If when UE switched to the 3GPP access from non-3GPP access trusty, this method was further comprising the steps of:
H2:MME authenticates to HSS, and the HSS authentication success sends message to MME, wherein comprises the P-GW address of this IP-CAN session and the PLMN id information of P-GW;
After I2:MME receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection;
J2:MME sends to S-GW and creates the default bearing request message, has the PLMN id information of this P-GW of preservation in the message, after S-GW receives this message, compares according to the PLMN id information of this P-GW and the PLMN ID of oneself, knows terminal roam access mode.
Further, the access way of terminal roaming refers to local routing mode or local break-out mode, P-GW or non-3 GPP access network trusty close according to the PLMN id information of this P-GW in the message of receiving and the PLMN ID of oneself and compare, if comparative result is identical, judge that then UE is to use the local routing mode to insert; If different, judge that UE is to use the local break-out mode to insert.
The method of terminal roam access mode is known in the present invention, on the basis of original flow process, transmit and preserve by increasing the PLMN id information, make the bearing binding and the reporting events functional entity that reside in gateway or IAD know terminal roam access mode, method is simple and be easy to realize.
Description of drawings
Fig. 1 is that UE adopts the non-roaming Organization Chart that 3GPP inserts and non-3GPP inserts.
Fig. 2 is the roaming Organization Chart that UE adopts the local routing mode to insert.
Fig. 3 is the roaming Organization Chart that UE adopts local transporting mode to insert.
Fig. 4 is the embodiment of the invention one user when using 3GPP to insert, and UE initiates the flow chart that adheres to.
Fig. 5 is the embodiment of the invention two users when using 3GPP to insert, and UE finishes and adheres to, and initiates the flow chart of new IP-CAN session.
Fig. 6 is the embodiment of the invention three users when using 3GPP to insert, and switches to the flow chart of another 3GPP network from the 3GPP network.
Fig. 7 is embodiment of the invention four-function family when using non-3GPP trusty to insert, and UE initiates to adhere to, and aaa server is the flow chart that IP-CAN sessions of users is selected P-GW.
Fig. 8 is the embodiment of the invention five users when using non-3GPP trusty to insert, and UE initiates to adhere to, and non-3 GPP access network trusty closes the flow chart for IP-CAN sessions of users selection P-GW.
Fig. 9 is that the embodiment of the invention six users use non-3GPP trusty to insert, and switches to the flow chart of 3GPP network from non-3GPP network trusty.
Figure 10 is that the embodiment of the invention seven users use 3GPP to insert, and switches to the flow chart of non-3GPP network trusty from the 3GPP network.
Embodiment
The present invention knows that the method for terminal roam access mode informs that promptly bearing binding and event reporting function entity B BERF know that it still is the method that Local Breakout mode inserts that the user uses Home Routed, and main thought of the present invention is:
When terminal uses 3GPP to insert the PDN network in the roaming place, MME selects after the P-GW for the IP-CAN session, preserve PLMN ID (the Public Land Mobile Network ID PLMN sign of this P-GW, be used for the residing network site of mark P-GW), inform the PLMN ID of this P-GW of S-GW.And the PLMN ID of this P-GW informed HSS, HSS preserves the PLMN ID of this P-GW.S-GW judges that according to the information of receiving the user is that Home Routed or LocalBreakout insert.
When terminal uses non-3GPP to insert the PDN network in the roaming place, if non-3 GPP access network trusty closes the P-GW that selects; Or the P-GW of aaa server selection, inform that non-3 GPP access network trusty closes the PLMN id information of this P-GW; Non-3 GPP access network trusty closes the PLMN id information according to this P-GW, and judgement is that Home Routed or Local Breakout mode insert; When P-GW reports updating message to aaa server, have the PLMNID information of P-GW in the message, aaa server is preserved the PLMN id information of the P-GW of this IP-CAN session selection.Aaa server informs that HSS preserves the PLMN id information of the P-GW of this IP-CAN session selection.
The IP-CAN sessions of users business when non-3GPP network trusty switches, keeps the continuity of session service from the 3GPP network, and aaa server obtains the PLMN ID of the P-GW of this IP-CAN session from HSS, informs that non-3 GPP access network trusty closes.Non-3 GPP access network trusty closes the PLMN id information according to the P-GW of this IP-CAN session of receiving, judgement is that Home Routed or Local Breakout insert.
The IP-CAN sessions of users business when the 3GPP network switches, keeps the continuity of session service from non-3GPP network trusty, and MME obtains the PLMN ID of the P-GW of this IP-CAN session from HSS, inform S-GW.S-GW is according to the PLMNID information of the P-GW of this IP-CAN session of receiving, and judgement is that Home Routed or Local Breakout insert.
Explanation in addition, the basis that the present invention uses is that terminal is set up the IP-CAN session in the roaming place, and MME wherein is the MME of roaming place, and aaa server is the AAA server in the home network.
Further describe in detail below in conjunction with the method for accompanying drawing invention.
Embodiment one
What present embodiment was described is to be under the 3GPP access roaming scene as UE, and the employing of 3GPP core net is the EPC framework.When UE initiated the IP-CAN session in the roaming place, MME received the user signing contract information from HSS, and MME selects a P-GW for this IP-CAN session after receiving message, and MME preserves the PLMN id information of the P-GW that selects.MME has the PLMN id information of the P-GW of selection to the response message of HSS transmission user signing contract information in the message.After HSS receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.When MME sends the request of establishment default bearing to S-GW,, inform the PLMN ID of the P-GW that this IP-CAN session of S-GW is selected with the PLMN ID that goes up the P-GW that selects.S-GW just can compare according to PLMN id information and the PLMN id information of oneself of the P-GW that receives like this: if identical, judge that UE inserts Home Routed mode; If different, judge that UE is to use Local BreakOut mode to insert.The flow chart of present embodiment as shown in Figure 4, each step is described below:
402, HSS sends user-dependent CAMEL-Subscription-Information to MME.
404, MME for this IP-CAN session distributes a P-GW, and preserves the PLMN id information of this P-GW according to the information of receiving when preserving APN and P-GW address.
406, MME has the PLMN id information of the P-GW of selection to the response message of HSS transmission user signing contract information in the message.
408, after HSS receives response message, preserve the PLMNID information of the P-GW of this IP-CAN session selection.
410, MME sends to S-GW and creates the default bearing request message, has the PLMN id information of this P-GW of preservation in the message.After S-GW receives this message like this, just can compare according to PLMN id information and the PLMN ID of oneself of this P-GW, judge that it still is that the HomeRouted mode inserts that the user adopts LBO, BBERF resident among the S-GW initiates request PCC strategy to PCRF in view of the above, sets up the session flow process to finish.
Embodiment two
What present embodiment was described is to be under the 3GPP access roaming scene as UE, and the employing of 3GPP core net is the EPC framework.UE has set up to finish in the roaming place and has adhered to, and this moment, UE initiated a new IP-CAN session, and MME selects a P-GW for this IP-CAN session after receiving message, and MME preserves the PLMN id information of the P-GW that selects.MME sends the PLMN ID that message informing HSS preserves the P-GW that selects to HSS.After HSS receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.When MME sends request bearing resource assignment messages to S-GW,, inform the PLMN ID of the selected P-GW of this IP-CAN session of S-GW with the PLMN ID that goes up the P-GW that selects.S-GW just can compare according to PLMN id information and the PLMN id information of oneself of the P-GW that receives like this: if identical, judge that UE inserts Home Routed mode; If different, judge that UE is to use Local BreakOut mode to insert.The flow chart of present embodiment as shown in Figure 5, each step is described below:
502, MME for this IP-CAN session distributes a P-GW, and preserves the PLMN id information of this P-GW according to the information of receiving.
504, MME preserves the P-GW information that this IP-CAN session is selected to the HSS notice.
506, after HSS receives response message, preserve the PLMNID information of the P-GW of this IP-CAN session selection.
508, MME sends request bearing resource assignment messages to S-GW, has the PLMN id information of this P-GW of preservation in the message.After S-GW receives this message like this, just can compare according to PLMN id information and the PLMN ID of oneself of this P-GW, judge that it still is that the HomeRouted mode inserts that the user adopts LBO, BBERF resident among the S-GW initiates request PCC strategy to PCRF in view of the above, sets up the session flow process to finish.
Embodiment three
What present embodiment was described is under the 3GPP of UE place access roaming scene, and the employing of 3GPP core net is the EPC framework.What present embodiment was described is that UE switches to another 3GPP access from the 3GPP access, the IP-CAN session service that is UE switches between the 3GPP network, this moment, variation took place in MME, New MME can send authentication request to Old MME, Old MME can send authentication response to New MME after receiving request, since before Old MME preserved the PLMN id information of the P-GW that selects for this IP-CAN session, in the response message with going up the PLMN id information that Old MME be this IP-CAN session selection P-GW.New MME preserves the PLMN id information of this P-GW, and when S-GW sends the request of establishment default bearing, with the PLMN id information of going up this P-GW, the PLMN id information of informing the selected P-GW of this IP-CAN session of S-GW.S-GW just can compare according to the PLMN id information of the P-GW that receives and the PLMN id information of oneself like this: if identical, judge that UE inserts Home Routed mode; If different, judge that UE is to use Local BreakOut mode to insert.The flow chart of present embodiment as shown in Figure 6, each step is described below:
602, Old MME sends authentication response to New MME, has the PLMN id information for the P-GW that gives IP-CAN session selection in the message.
604, New MME preserves the PLMN id information of this P-GW according to the information of receiving.
606, New MME sends to S-GW and creates the default bearing request message, has the PLMN id information of this P-GW of preservation in the message.After S-GW receives this message like this, just can compare according to PLMN id information and the PLMN ID of oneself of this P-GW, judge that it still is that Home Routed mode inserts that the user adopts LBO, BBERF resident among the S-GW initiates request PCC strategy to PCRF in view of the above, sets up the session flow process to finish.
More than be that UE changes the scene example that MME changes in the incision of 3GPP access environment.If MME does not change, only be between S-GW, to switch, omit 602,604 steps, directly the PLMN ID of the P-GW that this IP-CAN session is selected by MME sends to New S-GW by creating the default bearing request message.
Embodiment four
What present embodiment was described is the following time of roaming scence of adopting non-3GPP trusty to insert as UE, and the employing of 3GPP core net is the EPC framework.Present embodiment is described is that UE is when initiating the IP-CAN session, UE and non-3 GPP access network trusty close to aaa server initiates the authentication and authorization request, aaa server authenticates and allows UE to use non-3GPP gateway trusty to insert to UE, obtain user's CAMEL-Subscription-Information from HSS after, for P-GW has been selected in this IP-CAN session, the relevant information (address and the PLMN id information that comprise APN (Access Point Name, APN), P-GW) of this P-GW is handed down to the non-3 GPP access network pass.Non-3 GPP access network closes according to the PLMN id information of the P-GW that receives and the PLMN id information of oneself and compares: if identical, judge that UE inserts Home Routed mode; If different, judge that UE is to use Local BreakOut mode to insert.Non-3 GPP access network trusty afterwards closes and sends agent binding update messages to P-GW, and P-GW sends to aaa server and upgrades the P-GW address information, in the message with the PLMN ID that goes up this P-GW.After AAA receives this message, preserve this PLMN ID, send message to HSS again, have PLMN ID in the message.After HSS receives message, save as the PLMN id information of the P-GW of this IP-CAN session selection.The flow chart of present embodiment as shown in Figure 7, each step is described below:
702, non-3 GPP access network trusty closes to aaa server and initiates the authentication and authorization request, the aaa server authentication success, and selected P-GW for the IP-CAN session, and the address information of P-GW is sent to non-3 GPP access network trusty close, have the PLMN ID of this P-GW in the message.After non-3 GPP access network trusty like this closes and receives this message, just can compare, judge that it still is that Home Routed mode inserts that the user adopts LBO according to PLMNID information and the PLMN ID of oneself of this P-GW.
704, non-3 GPP access network trusty closes the address information of having learnt P-GW, sends agent binding update messages to P-GW.
After aaa server sends to IAD with the relevant information of P-GW, by this message informing P-GW, and send scheduler message in order to authenticate P-GW to aaa server in the following steps 706 by S-GW.
706, after P-GW receives message, send renewal PDN GW address message, have the PLMN ID of this P-GW in the message to aaa server.
708, after aaa server is received message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.
710, aaa server sends message to HSS, has the PLMN id information of this P-GW in the message, informs that HSS preserves the PLMN id information of the P-GW of this IP-CAN selection.
712, after HSS receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.
Embodiment five
What present embodiment was described is the following time of roaming scence of adopting non-3GPP trusty to insert as UE, and the employing of 3GPP core net is the EPC framework.Present embodiment is described is that UE is when initiating the IP-CAN session, UE and non-3 GPP access network trusty close to aaa server initiates the authentication and authorization request, aaa server authenticates and allows UE to insert to UE, obtain user's CAMEL-Subscription-Information from HSS after, do not selected P-GW for this IP-CAN session, the relevant information (whether comprise APN and allow selects P-GW to insert in the roaming place) of selecting P-GW is handed down to non-3 GPP access network closes
After non-3 GPP access network trusty closes and receives message, for a P-GW, relatively the PLMN id information of the P-GW of Xuan Zeing and the PLMN id information of oneself are selected in this IP-CAN session:, judge that UE inserts Home Routed mode if identical; If different, judge that UE is to use the LocalBreakOut mode to insert.Non-3 GPP access network trusty afterwards closes and sends agent binding update messages to P-GW, and P-GW sends to aaa server and upgrades the P-GW address information, in the message with the PLMN ID that goes up this P-GW.After AAA receives this message, preserve this PLMN ID, send message to HSS again, have PLMN ID in the message.After HSS receives message, save as the PLMN id information of the P-GW of this IP-CAN session selection.The flow chart of present embodiment as shown in Figure 8, each step is described below:
802, non-3 GPP access network trusty closes to aaa server and initiates the authentication and authorization request, the aaa server authentication success, not selected P-GW for the IP-CAN session, is that scope and the strategy (whether comprise APN and allow selects P-GW to insert in the roaming place) that will select sends to non-3 GPP access network trusty pass.After non-3 GPP access network trusty closed and receives this message, for P-GW is selected in this IP-CAN session, relatively the PLMN ID of the P-GW of Xuan Zeing and the PLMN ID of oneself judged that it still is that Home Routed mode inserts that the user adopts LBO.
804, non-3PP IAD trusty sends agent binding update messages to the P-GW that selects.
806, after P-GW receives message, send renewal PDN GW address message, have the PLMN ID of this P-GW in the message to aaa server.
808, after aaa server is received message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.
810, aaa server sends message to HSS, has the PLMN id information of this P-GW in the message, informs that HSS preserves the PLMN id information of the P-GW of this IP-CAN selection.
812, after HSS receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.
Select P-GW by aaa server among the embodiment 4, and select P-GW by IAD among the embodiment 5, two kinds of selection modes can compatible networking model in the past.
Embodiment six
What present embodiment was described is the following time of roaming scence of adopting non-3GPP trusty to insert as UE, and the employing of 3GPP core net is the EPC framework.When UE inserts when switching to 3GPP and inserting from non-3GPP trusty, MME authenticates to HSS, the HSS authentication success, in MME transmission message, comprise the P-GW address of this IP-CAN session selection and the PLMN id information of P-GW (because HSS has preserved this information before), when MME sends the request of establishment default bearing to S-GW, with the PLMN ID that goes up the P-GW that selects, inform the PLMN ID of the selected P-GW of this IP-CAN session of S-GW.S-GW just can compare according to PLMN id information and the PLMN id information of oneself of the P-GW that receives like this: if identical, judge that UE inserts Home Routed mode; If different, judge that UE is to use Local BreakOut mode to insert.The flow chart of present embodiment as shown in Figure 9, each step is described below:
902, MME authenticates to HSS, and the HSS authentication success comprises the PLMN id information of the P-GW that this IP-CAN session selects in MME sends message.
904, after MME receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection.
906, MME sends to S-GW and creates the default bearing request message, has the PLMN id information of this P-GW of preservation in the message.After S-GW receives this message like this, just can compare, judge that it still is that the HomeRouted mode inserts that the user adopts LBO according to PLMN id information and the PLMN ID of oneself of this P-GW.
Embodiment seven
What present embodiment was described is the following time of roaming scence of adopting 3GPP to insert as UE, and the employing of 3GPP core net is the EPC framework.When UE inserts when switching to non-3GPP trusty and inserting from 3GPP, UE and non-3 GPP access network trusty close to aaa server initiates the authentication and authorization request, AAA obtains the PLMN id information (because HSS has preserved this information before) of the P-GW of this IP-CAN session selection from HSS, aaa server authenticates and allow UE to use non-3GPP gateway trusty to insert to UE.Aaa server is handed down to the non-3 GPP access network pass with the relevant information of this P-GW, and the P-GW relevant information comprises P-GW address and PLMN ID.Non-3 GPP access network trusty so just closes and can compare according to PLMN id information and the PLMN id information of oneself of the P-GW that receives: if identical, judge that UE inserts Home Routed mode; If different, judge that UE is to use Local BreakOut mode to insert.The flow chart of present embodiment as shown in figure 10, each step is described below:
1002, non-3 GPP access network trusty closes to aaa server and initiates authentication.
1004, aaa server is judged authentication success, obtains the relevant P-GW information of this IP-CAN session to HSS, comprises the PLMN id information of P-GW.
1006, after AAA receives message, preserve the relevant information of the P-GW of this IP-CAN session selection, comprise the PLMN id information of P-GW.
1008, aaa server sends to non-3 GPP access network trusty pass with the relevant information (the PLMN id information that comprises P-GW) of P-GW.After non-3 GPP access network trusty like this closes and receives this message, just can compare, judge that it still is that Home Routed mode inserts that the user adopts LBO according to PLMN id information and the PLMN ID of oneself of this P-GW.
Above embodiment, about the transmission of PLMN id information with to preserve all be on the basis that is original flow process, by increasing the PLMN id information, make the bearing binding that resides in gateway or IAD and reporting events functional entity know terminal roam access mode, and all very little to the change of existing system and flow process.
More than said IP-CAN session comprise all IP-based business, at present except the initiation IP-CAN session of above embodiment with switch, the bearing binding and the reporting events functional entity that reside in gateway or IAD need be known outside the access way according to the information of P-GW, similarly use if having, also can be suitable for the present invention with above embodiment.
Claims (9)
1. method of knowing terminal roam access mode is characterized in that: terminal UE is at 3GPP accessing group data network PDN and initiate IP and merge Access Network IP-CAN session service, and this method may further comprise the steps:
A1: mobile management unit MME is described IP-CAN session assigns packet data network gateway P-GW, and preserves the PLMN sign PLMN id information of this P-GW;
B1:MME sends bearing request message to gateway S-GW, has the PLMN id information of this P-GW of preservation in the message;
After C1:S-GW receives this message, compare, know terminal roam access mode, and finish the IP-CAN session and set up flow process according to the PLMN id information of this P-GW and the PLMN ID of oneself.
2. the method for claim 1 is characterized in that: if described IP-CAN session service switches between 3GPP inserts, and MME changes, and is then further comprising the steps of behind the step C1:
D1: old MME sends authentication request to new MME, and old MME sends authentication response to new MME, carries the PLMN id information into the P-GW that gives IP-CAN session selection in the message;
E1: new MME preserves the PLMN id information of this P-GW according to the information of receiving;
F1: new MME sends to S-GW and creates the default bearing request message, the relevant information that has this P-GW of preservation in the message after S-GW receives this message, compares according to the PLMN id information of this P-GW and the PLMN ID of oneself, know terminal roam access mode, set up the session flow process to finish.
3. the method for claim 1, it is characterized in that: if described IP-CAN session service switches between 3GPP inserts, and S-GW changes, then further comprising the steps of behind the step C1: MME sends to new S-GW and creates the default bearing request message, carry the PLMN id information of the P-GW of described IP-CAN session in the message, after new S-GW receives this message, PLMN id information and the PLMN ID of oneself according to this P-GW compare, know terminal roam access mode, set up the session flow process to finish.
4. as each described method in the claim 1 to 3, it is characterized in that: MME sends response message to HSS after described IP-CAN session distributes P-GW in the steps A 1, carry the PLMN id information of the P-GW of selection in the message, after HSS receives response message, preserve the PLMN id information of the P-GW of this IP-CAN session selection; If UE inserts when switching to non-3GPP trusty and inserting from 3GPP, and is then further comprising the steps of behind step C1 or the F1:
G1: non-3 GPP access network trusty closes to aaa server initiates authentication;
The H1:AAA server is judged authentication success, obtains the PLMN id information of the P-GW of this IP-CAN session to HSS;
After I1:AAA receives message, preserve the PLMN id information of the P-GW of this IP-CAN session;
The J1:AAA server sends to non-3 GPP access network trusty pass with the relevant information of P-GW, non-3 GPP access network trusty compares according to the PLMN id information of this P-GW and the PLMN ID of oneself after closing and receiving this message, know terminal roam access mode, and finish the switching access process.
5. as each described method in the claim 1 to 3, it is characterized in that: the access way of terminal roaming refers to local routing mode or local break-out mode, P-GW or non-3 GPP access network trusty close according to the PLMN id information of this P-GW in the message of receiving and the PLMN ID of oneself and compare, if comparative result is identical, judge that then UE is to use the local routing mode to insert; If different, judge that UE is to use the local break-out mode to insert.
6. a method of knowing terminal roam access mode is characterized in that, when terminal inserted and initiates the IP-CAN session at non-3GPP trusty, this method may further comprise the steps:
After the success of A2:AAA server authentication, being chosen as the IP-CAN session by aaa server selects, the PLMN id information that sends P-GW closes to non-3 GPP access network trusty, or the related news of aaa server transmission P-GW, is closed by non-3 GPP access network trusty and selects P-GW;
B2: non-3 GPP access network trusty closes according to the PLMN id information of this P-GW and own PLMN ID comparison, knows terminal roam access mode and finishes session and set up flow process.
7. method as claimed in claim 6, it is characterized in that: aaa server sends to the information that comprises APN and whether allow to insert at roaming place selection P-GW in the message of non-3 GPP access network trusty pass in the steps A 2, non-3 GPP access network trusty closes according to receiving message, for P-GW is selected in this IP-CAN session.
8. as claim 6 or 7 described methods, it is characterized in that: further comprising the steps of behind the step B2:
C2: non-3 GPP access network trusty closes the address information of having learnt P-GW, sends agent binding update messages to P-GW;
After D2:P-GW receives message, send renewal PDN GW address message, have the PLMN ID of this P-GW in the message to aaa server;
After the E2:AAA server is received message, preserve the PLMNID information of the P-GW of this IP-CAN session selection;
The F2:AAA server sends message to HSS, has the PLMN id information of this P-GW in the message, informs that HSS preserves the PLMN id information of the P-GW of this IP-CAN selection;
After G2:HSS receives message, preserve the PLMN ID of the P-GW of this IP-CAN session selection;
If when UE switched to the 3GPP access from non-3GPP access trusty, this method was further comprising the steps of:
H2:MME authenticates to HSS, and the HSS authentication success sends message to MME, wherein comprises the P-GW address of this IP-CAN session and the PLMN id information of P-GW;
After I2:MME receives message, preserve the PLMN id information of the P-GW of this IP-CAN session selection;
J2:MME sends to S-GW and creates the default bearing request message, has the PLMN id information of this P-GW of preservation in the message, after S-GW receives this message, compares according to the PLMN id information of this P-GW and the PLMN ID of oneself, knows terminal roam access mode.
9. as claim 6 or 7 described methods, it is characterized in that: the access way of terminal roaming refers to local routing mode or local break-out mode, P-GW or non-3 GPP access network trusty close according to the PLMN id information of this P-GW in the message of receiving and the PLMN ID of oneself and compare, if comparative result is identical, judge that then UE is to use the local routing mode to insert; If different, judge that UE is to use the local break-out mode to insert.
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