CN101835134A - Redirecting method of S101 tunnel and related device thereof - Google Patents

Redirecting method of S101 tunnel and related device thereof Download PDF

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Publication number
CN101835134A
CN101835134A CN200910118780A CN200910118780A CN101835134A CN 101835134 A CN101835134 A CN 101835134A CN 200910118780 A CN200910118780 A CN 200910118780A CN 200910118780 A CN200910118780 A CN 200910118780A CN 101835134 A CN101835134 A CN 101835134A
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network
target
identification information
subscriber equipment
mobility management
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CN101835134B (en
Inventor
王珊珊
吴问付
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN2009101187809A priority Critical patent/CN101835134B/en
Priority to PCT/CN2010/070983 priority patent/WO2010102571A1/en
Publication of CN101835134A publication Critical patent/CN101835134A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover

Abstract

The embodiment of the invention discloses a redirecting method of an S101 tunnel and a related device thereof. The redirecting method of the S101 tunnel comprises the following steps of: acquiring the identifying information of a target access network of a second network provided by a target base station of a first network by a target mobility management entity of the first network; and establishing an S101 tunnel way accordingly, wherein the target mobility management entity of the first network and a target access network router of the second network can be ensured to be reachable because the identifying information of the target access network of the second network is provided by the target base station of the first network, therefore the redirected S101 tunnel is prevented from being ineffective.

Description

Method and relevant apparatus that the S101 tunnel is redirected
Technical field
The present invention relates to the communications field, especially relate to method and relevant apparatus that a kind of S101 tunnel is redirected.
Background technology
In order to optimize subscriber equipment (UE) from Long Term Evolution/System Architecture Evolution (LTE/SAE, Long TermEvolved/System Architecture Evolution) network is to code division multiple access (CDMA, Code-Division Multiple Access) 2000 High Rate Packet Data (HRPD, High RatePacket Data) handoff procedure of network, third generation partner program (3GPP, The 3rd GenerationPartnership Project) is divided into two processes with handoff procedure: pre-registration process and hand-off execution process.Herein, the LTE/SAE network is called first network, the CDMA2000 network is called second network, alleged pre-registration process occurs in before the actual handover process, it is the Access Network that UE still resides at the LTE/SAE network, when being global system for mobile communications wireless access network (E-UTRAN, Evolved UniversalMobile Telecommunication System Radio Access Network), carry out process to the HRPD registration.Connection between the Mobility Management Entity (MME, MobilityManagement Entity) that the pre-registration process can be set up first network and the HRPD access network (AN, Access Network) of second network is called the S101 tunnel.
Carried out the pre-registration process of HRPD as UE after, when the control area of (promptly alleged source base station) usually moves to the control area of another base station (promptly common alleged target BS) from the base station (eNodeB) of first network, when perhaps the Mobility Management Entity of first network of this UE correspondence changes, UE can initiate base station handoff procedure or tracing section updating (TAU, Track area update) process, and trigger S101 tunnel redirection process.
In research and practice process to prior art, the present inventor finds to exist following problem:
In S101 tunnel redirection process, the target mobility management entity of first network (corresponding with the target BS of first network) is the sign of the source Access Network of the second corresponding network of the source Mobility Management Entity (corresponding with the source base station of first network) according to first network, carry out related with the source Access Network of second network S101 tunnel, just the S101 tunnel is redirected to the source Access Network of second network of the source Mobility Management Entity correspondence of first network, and the source Access Network of the target mobility management entity of first network and second network not necessarily route can reach, therefore, exist may be invalid and cause the invalid situation of pre-registration of subscriber equipment in the S101 tunnel that is redirected.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides method and the relevant apparatus that invalid S101 tunnel, a kind of S101 of avoiding tunnel is redirected.
For solving the problems of the technologies described above, embodiment provided by the present invention is achieved through the following technical solutions:
The method that a kind of S101 tunnel is redirected, comprise: switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, perhaps after subscriber equipment switched to the target BS of first network by the source base station of first network, the target mobility management entity of first network of the target BS correspondence of first network was obtained the identification information of the target access network of second network from the target BS of first network; Second network is the network of this subscriber equipment pre-registration; The target mobility management entity of first network is according to the identification information of the target access network of second network, sets up the S101 tunnel of this subscriber equipment with the target access network of second network.
A kind of Mobility Management Entity, comprise: obtain the target identification unit, be used for switching to by the source base station of first network process of the target BS of first network at subscriber equipment, perhaps after subscriber equipment switches to the target BS of first network by the source base station of first network, obtain the identification information of the target access network of second network from the target BS of first network; Second network is the network of this subscriber equipment pre-registration; Set up the unit, tunnel, be used for identification information, set up the S101 tunnel of this subscriber equipment with the target access network of second network according to the target access network that obtains second network that the target identification unit obtains.
A kind of base station comprises: generate the target identification unit, be used to generate the identification information of the target access network of second network; Second network is the network of the subscriber equipment pre-registration in first network that resides under self; Send the target identification unit, be used for switching to by the source base station of first network process of self at subscriber equipment, perhaps after subscriber equipment switches to self by the source base station of first network, send the identification information of the target access network of second network that described generation target identification unit generates to the Mobility Management Entity of first network of self correspondence.
By technique scheme as can be seen, the embodiment of the invention adopts the identification information that is obtained the target access network of second network that the target BS of first network provides by the target mobility management entity of first network, and set up the mode in S101 tunnel in view of the above with it, because the identification information of the target access network of second network is provided by the target BS of first network, can guarantee that the target mobility management entity of first network and the target access network route of second network can reach, thereby the S101 tunnel after avoiding being redirected is invalid.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that subscriber equipment is from the system architecture diagram of E-UTRAN to the HRPD pre-registration;
Fig. 2 is the method flow schematic diagram of the embodiment of the invention one;
Fig. 3 is the network diagram that base station switching or tracing section updating take place behind the subscriber equipment pre-registration;
Fig. 4 is the method flow schematic diagram of the embodiment of the invention two;
Fig. 5 is the method flow schematic diagram of the embodiment of the invention three;
Fig. 6 is the method flow schematic diagram of the embodiment of the invention four;
Fig. 7 is the method flow schematic diagram of the embodiment of the invention five;
Fig. 8 is the method flow schematic diagram of the embodiment of the invention six;
Fig. 9 is the method flow schematic diagram of the embodiment of the invention seven;
Figure 10 is the structural representation of embodiment of the invention Mobility Management Entity;
Figure 11 is the structural representation of embodiment of the invention base station.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The subscriber equipment (UE) that resides among the Access Network E-UTRAN of first network (LTE/SAE) can be as shown in Figure 1 to the system architecture diagram of HRPD Access Network (HRPD AN) pre-registration of second network (CDMA2000), wherein,
E-UTRAN is the wireless access network of LTE/SAE network, is responsible for subscriber equipment is linked in the LTE/SAE network, comprises eNodeB equipment among the E-UTRAN;
MME is responsible for the mobile management of chain of command, comprises the management of user's context and mobile status, distributing user temporary identity sign, safety function etc.;
HRPD AN is the Access Network of CDMA2000, is responsible for subscriber equipment is linked in the CDMA2000 network by the HRPD access technology;
The S101 tunnel is the data channel between MME and the HRPD AN, carries out the pre-registration process of HPPD when being used for UE and residing in E-UTRAN.
Below be specific embodiments of the invention.
The method that embodiment one, a kind of S101 tunnel are redirected referring to Fig. 2, comprises the steps:
Step 101: switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, perhaps after subscriber equipment switched to the target BS of first network by the source base station of first network, the target mobility management entity of first network of the target BS correspondence of first network was obtained the identification information of the target access network of second network from the target BS of first network; Second network is the network of subscriber equipment pre-registration.
Subscriber equipment is after the source of second network Access Network carries out pre-registration, if occurrence positions moves, the base station of first network of this subscriber equipment correspondence can change, and the Mobility Management Entity of first network of this subscriber equipment correspondence also may change.Tracing section updating may take place in first network for residing state difference when moving in the position according to subscriber equipment, subscriber equipment or switch the base station, and in this process, S101 tunnel redirection process is triggered.Perhaps, also can be that S101 tunnel redirection process was triggered after base station handoff procedure in first network was finished.
Particularly, if in first network, be in Idle state when subscriber equipment moves in the position, promptly there is not signaling to be connected with network side, subscriber equipment can carry out tracing section updating, comprise to the target BS of first network sending the tracing section updating request that the target BS of first network sends to the tracing section updating request target mobility management entity of first network of self correspondence; If in first network, be in activated state (connected state) when subscriber equipment moves in the position, promptly there is signaling to be connected with network side, subscriber equipment then carries out the base station and switches, comprise to the target BS of first network sending switch acknowledgment message that the target BS of first network sends to switch acknowledgment message the target mobility management entity of first network of self correspondence equally.
Can carry self identification information in the message such as tracing section updating request that the target BS of first network sends or switching affirmation, also can not carry, not influence the realization of the embodiment of the invention according to the target access network of second network of pre-configured generation.
When the target mobility management entity of first network carries the identification information of target access network of second network in the message that receives, can directly find the address of the target access network of second network according to this sign; When not carrying the identification information of target access network of second network in the message that receives, the target mobility management entity of first network can send query messages to the target BS of first network, obtain the identification information of the target access network of second network.
The identification information of the Access Network that relates in the embodiment of the invention can be other identification informations of sector mark, access network elements sign or Access Network.
Step 102: the target mobility management entity of first network is according to the identification information of the target access network of second network, sets up the S101 tunnel of this subscriber equipment with the target access network of second network.
Can be referring to Fig. 3, Fig. 3 for subscriber equipment after the source of second network Access Network carries out pre-registration, take place that switch base station in first network or the schematic network structure of tracing section updating.From this figure, can find out, switch to the target BS of first network at subscriber equipment after, the target mobility management entity of first network under the target BS of first network is obtained the identification information of the target access network of second network from the target BS of first network, sets up the S101 tunnel that is redirected according to this sign and the target access network of second network.
If the corresponding same Mobility Management Entity in two base stations that first network switches, then target mobility management entity and source Mobility Management Entity are same equipment, do not influence the realization of the embodiment of the invention.
Present embodiment adopts the identification information that is obtained the target access network of second network that the target BS of first network provides by the target mobility management entity of first network, and set up the mode in S101 tunnel in view of the above with it, because the identification information of the target access network of second network is provided by the target BS of first network, can guarantee that the target mobility management entity of first network and the target access network route of second network can reach, thereby the S101 tunnel after avoiding being redirected is invalid.
Embodiment two, a kind of changing method are based on the performed a kind of changing method of method that the embodiment one S101 tunnel of describing is redirected, and referring to Fig. 4, comprise the steps:
Step 11: switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, perhaps after subscriber equipment switches to the target BS of first network by the source base station of first network, the target mobility management entity of first network of the target BS correspondence of first network is obtained the identification information of the target access network of second network from the target BS of first network, and the source Access Network that the target mobility management entity of first network is obtained second network from the source Mobility Management Entity of first network of the source base station correspondence of the target BS of first network or first network is distributed to the sign of this subscriber equipment; This subscriber equipment has carried out pre-registration at the source of second network Access Network.
In this step, the target BS of first network obtains the process of identification information of the target access network of second network and can carry out with reference to step 101 among the embodiment one.In addition, for carrying out in second network source Access Network to the needs of the switching of target access network, the source Access Network that the target BS of first network also needs to obtain second network is distributed to the sign of this subscriber equipment.
Step 12: the target mobility management entity of first network is according to the identification information of the target access network of second network, set up the S101 tunnel of this subscriber equipment with the target access network of second network, and the sign that the source Access Network of second network is distributed to this subscriber equipment is sent to the target access network of second network.
Step 13: the target access network of second network is distributed to the sign of this subscriber equipment according to the source Access Network of second network, switches with the source Access Network of second network.
After the target access network of second network gets access to the sign of subscriber equipment in the target mobility management entity from first network, can switch with the source Access Network of second network, comprise processes such as carrying out context swap, obtaining the session information of subscriber equipment, thereby guarantee that the pre-registration of subscriber equipment in second network is effective.
Present embodiment is on the basis of embodiment one, further after the S101 tunnel is redirected, carry out in second network by the switching of source Access Network to target access network, the assurance subscriber equipment is when occurrence positions moves in first network, and the pre-registration in second network is remained valid.
Following examples three, four are described in respectively in the process that subscriber equipment (UE) is in Idle state generation tracing section updating (TAU), carry or do not carry the hand-off process flow process of sign of the target access network (HRPD AN) of second network (CDMA2000) in the message that the target BS (eNodeB) of first network (LTE/SAE) sends.Embodiment five and six are described in UE respectively and are in activated state and take place in the process that eNodeB switches, carry or do not carry the hand-off process flow process of sign of the target HRPD AN of second network in the message that the target eNode B of first network sends.Seven of embodiment are described in UE after the source of second network HRPD AN carries out pre-registration and finish eNodeB in first network switching, carry out the S101 tunnel be redirected and second network in the flow process switched.
For simplicity, in following examples, the unified source base station that uses eNodeB-1 to represent first network, MME-1 represents the Mobility Management Entity (being the source Mobility Management Entity) of first network of eNodeB-1 correspondence, HRPD AN-1 represents the source Access Network of second network, eNodeB-2 represents the target BS of first network, and MME-2 represents the Mobility Management Entity (being target mobility management entity) of first network of eNodeB-2 correspondence, and HRPD AN-2 represents the target access network of second network.
Embodiment three, describe in detail referring to Fig. 5, Fig. 5 is the method flow schematic diagram of present embodiment.
After step 201:UE carried out the pre-registration process of second network (CDMA2000) HRPD AN by first network (LTE/SAE), the S101 tunnel was set up between MME-1 and HRPD AN-1.
When UE is in Idle state, begun to switch to MME-2 by MME-1, then Guan Lian eNodeB also begins to switch to eNodeB-2 from eNodeB-1.Because of the coverage of MME is bigger than eNodeB, therefore when the MME switching took place, the eNodeB of UE association must also can switch.
Step 202:UE sends the TAU request message to eNodeB-2.
Portability HRPD AN-1 is the sign that UE distributes in the message, that is, and and management access terminal identification (UATI, Unicast Access Terminal Identifier).
Step 203:eNodeB-2 sends to MME-2 with the TAU request message that receives, and carries the sign of HRPD AN-2 in message.
The sign of HRPD AN-2 can be generated according to static configuration by eNodeB-2, specifically can be the sector mark of HRPDAN-2 or the network element ID of HRPD AN-2.Certainly, go back the UATI that portability HRPDAN-1 distributes to UE in this message.
It is mutual that step 204:MME-2 and MME-1 carry out context, obtains the context of UE.
Usually, MME-2 also can carry out and upgrade and gateway (S-GW, Serving Gateway), packet data network gateway (P-GW, Packet Data Network Gateway) carrying between, to home subscriber server (HSS, Home Subscribers Server) initiate operation such as position updating request, HSS carries out the canceling position enrollment process to MME-1, replys the position to MME-2 and upgrades response.
In addition, the TAU request message that sends to eNodeB-2 as if UE in step 202 does not carry the UATI that HRPD AN-1 distributes to UE, MME-2 also can carry out in the mutual process of context with MME-1 in this step, obtain the UATI that HRPD AN-1 distributes to UE, do not influence the realization of the embodiment of the invention.
Step 205:MME-2 selects HRPD AN-2 to set up the connection of S101 tunnel according to the sign of the HRPD AN-2 that receives; And the UATI that HRPD AN-1 is distributed sends to HRPD AN-2.
Step 206:HRPD AN-2 switches according to UATI and the HRPD AN-1 of UE, and HRPDAN-2 obtains the session information of UE.
Handoff procedure between HRPD AN-2 and the HRPD AN-1 can be briefly described as follows:
A, HRPD AN-2 find HRPD AN-1 according to the UATI that HRPD AN-1 distributes, and send A13 interface session information transmission request to HRPDAN-1, obtain the session information of UE; And with target access network gateway (HSGW-2) between set up the A11 interface and be connected;
Set up data between b, HSGW-2 and source target access network gateway (HSGW-1) and send the tunnel, the source business datum is sent to HSGW-2;
C, HSGW-2 notice HSGW-1 removes data and sends the tunnel; HSGW-1 discharges the source resource.
When HRPD AN-2 and HRPD AN-1 belonged to same HSGW, then step b, c did not carry out.
Step 207:HRPD AN-2 replys the S101 connection to MME-2 and finishes message.
Step 208:MME-2 replys TAU to UE and finishes response.
When present embodiment is in Idle state at UE, in the TAU of the target mobility management entity that sends to first network request message, carry the identification information of the target access network of second network by the target BS of first network, after making that subscriber equipment occurrence positions in first network upgrades, the S101 tunnel that is redirected is effective, and further guarantee in second network, to carry out by the source Access Network after the switching of target access network, the pre-registration of subscriber equipment is effective.
Embodiment four, describe in detail referring to Fig. 6, Fig. 6 is the method flow schematic diagram of present embodiment.
After step 301:UE carried out the pre-registration process of second network (CDMA2000) HRPD AN by first network (LTE/SAE), the S101 tunnel was set up between MME-1 and HRPD AN-1.
When UE is in Idle state, begun to switch to MME-2 by MME-1, then Guan Lian eNodeB also begins to switch to eNodeB-2 from eNodeB-1.
Step 302:UE sends the TAU request message to eNodeB-2.
Step 303:eNodeB-2 sends to MME-2 with the TAU request message that receives.
It is mutual that step 304:MME-2 and MME-1 carry out context, obtains the sign of HRPD AN-1 and the UATI that HRPD AN-1 distributes to UE.
With reference to the step 202 and 203 of embodiment three, MME-2 also can obtain the UATI that HRPD AN-1 distributes to UE from UE sends to the TAU request message of eNodeB-2, do not influence the realization of the embodiment of the invention.
Step 305:MME-2 initiates the identification information inquiry of HRPD AN-2 to eNodeB-2, and eNodeB-2 returns the sign of pre-configured HRPD AN-2.
Step 304 and step 305 can be carried out simultaneously, do not influence the realization of the embodiment of the invention.
Step 306～309 are similar with step 205～208, repeat no more.
When present embodiment is in Idle state at UE, initiatively inquire about and obtain the identification information of the target access network of second network to the target BS of first network by the target mobility management entity of first network, after making that subscriber equipment occurrence positions in first network upgrades, the S101 tunnel that is redirected is effective, and further guarantee in second network, to carry out by the source Access Network after the switching of target access network, the pre-registration of subscriber equipment is effective.
Embodiment five, describe in detail referring to Fig. 7, Fig. 7 is the method flow schematic diagram of present embodiment.
After step 401:UE carried out the pre-registration process of second network (CDMA2000) HRPD AN by first network (LTE/SAE), the S101 tunnel was set up between MME-1 and HRPD AN-1.
When UE is in connected state, begin to switch to eNodeB-2 by eNodeB-1.
Step 402:UE sends switch acknowledgment message to eNodeB-2, and portability HRPD AN-1 distributes to the UATI of UE in the message.
Step 403:eNodeB-2 sends to MME-2 with the switch acknowledgment message that receives, and carries the sign of HRPD AN-2 in message.Certainly, go back the UATI that portability HRPD AN-1 distributes to UE in this message.
It is mutual that step 404:MME-2 and MME-1 carry out context, obtains the context of UE.
Step 403 and step 404 can be carried out simultaneously, do not influence the realization of the embodiment of the invention.
If UE sends in the switch acknowledgment message of eNodeB-2 and does not carry the UATI that HRPDAN-1 distributes to UE in step 402, MME-2 also can carry out in the mutual process of context with MME-1 in this step, obtain the UATI that HRPD AN-1 distributes to UE, do not influence the realization of the embodiment of the invention.
Step 405～408 are similar with step 205～208, repeat no more.
When present embodiment is in connected state at UE, in the switch acknowledgment message of the target mobility management entity that sends to first network, carry the identification information of the target access network of second network by the target BS of first network, make that the base station switching takes place subscriber equipment in first network after, the S101 tunnel that is redirected is effective, and further guarantee in second network, to carry out by the source Access Network after the switching of target access network, the pre-registration of subscriber equipment is effective.
Embodiment six, describe in detail referring to Fig. 8, Fig. 8 is the method flow schematic diagram of present embodiment.
After step 501:UE carried out the pre-registration process of second network (CDMA2000) HRPD AN by first network (LTE/SAE), the S101 tunnel was set up between MME-1 and HRPD AN-1.
When UE is in connected state, begin to switch to eNodeB-2 by eNodeB-1.
Step 502:UE sends switch acknowledgment message to eNodeB-2.
Step 503:eNodeB-2 sends to MME-2 with the switch acknowledgment message that receives.
It is mutual that step 504:MME-2 and MME-1 carry out context, obtains the sign of HRPD AN-1 and the UATI that HRPD AN-1 distributes to UE.
With reference to the step 402 and 403 of embodiment five, MME-2 also can obtain the UATI that HRPD AN-1 distributes to UE from UE sends to the switch acknowledgment message of eNodeB-2, do not influence the realization of the embodiment of the invention.
Step 505:MME-2 initiates the identification information inquiry of HRPD AN-2 to eNodeB-2, and eNodeB-2 returns the sign of pre-configured target HRPD AN-2.
Step 504 and step 505 can be carried out simultaneously, do not influence the realization of the embodiment of the invention.
Step 506～509 are similar with step 205～208, repeat no more.
When present embodiment is in connected state at UE, initiatively inquire about and obtain the identification information of the target access network of second network to the target BS of first network by the target mobility management entity of first network, after making that subscriber equipment occurrence positions in first network upgrades, the S101 tunnel that is redirected is effective, and further guarantee in second network, to carry out by the source Access Network after the switching of target access network, the pre-registration of subscriber equipment is effective.
Embodiment seven, describe in detail referring to Fig. 9, Fig. 9 is the method flow schematic diagram of present embodiment.
After step 601:UE carried out the pre-registration process of second network (CDMA2000) HRPD AN by first network (LTE/SAE), the S101 tunnel was set up between MME-1 and HRPD AN-1.
When step 602:UE is in Idle state, the TAU process has taken place, promptly UE has switched to MME-2 by MME-1, and then Guan Lian eNodeB has also switched to eNodeB-2 from eNodeB-1.
UE sends the TAU request message to eNodeB-2, eNodeB-2 sends to MME-2 with the TAU request message that receives, it is mutual that MME-2 and MME-1 carry out context, obtain the context of UE, distribute to the UATI of UE, and carry out the carrying between renewal and SGW, the PGW comprising HRPD AN-1, initiate operations such as position updating request to HSS, HSS carries out the canceling position enrollment process to MME-1, replys the position to MME-2 and upgrades response, and MME-2 replys TAU to UE and finishes response.
Step 603:UE initiates to set up process (this process is by eNodeB-2 and MME-2 transparent transmission) with the session of HRPD AN-2 by eNodeB-2, eNodeB-2 sends uplink tunnel encapsulation messages (for example up S1 CDMA2000 tunnel encapsulation message) to MME-2, carries the sign according to the HRPD AN-2 of pre-configured generation in this message.
Step 604～605 are similar with step 205～206, repeat no more.
Present embodiment is after UE finishes handoff procedure in first network, set up in the process of session at the target access network of the UE and second network, the uplink tunnel encapsulation messages of identification information that is sent the target access network that carries second network by the target BS of first network is to the target mobility management entity of first network, after making that subscriber equipment occurrence positions in first network upgrades, the S101 tunnel that is redirected is effective, and further guarantee in second network, to carry out by the source Access Network after the switching of target access network, the pre-registration of subscriber equipment is effective.
Need to prove, for aforesaid each method embodiment, for simple description, so it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that describes in detail among certain embodiment, can be referring to the associated description of other embodiment.
The method that more than provides a kind of S101 tunnel to be redirected, the embodiment of the invention also provides a kind of Mobility Management Entity, a kind of base station.
A kind of Mobility Management Entity 10 can be referring to Figure 10, and Figure 10 is the structural representation of embodiment of the invention Mobility Management Entity, comprising:
Obtain target identification unit 11, be used for switching to by the source base station of first network process of the target BS of first network at subscriber equipment, perhaps after subscriber equipment switches to the target BS of first network by the source base station of first network, obtain the identification information of the target access network of second network from the target BS of first network; Second network is the network of subscriber equipment pre-registration.
Set up unit, tunnel 12, be used for identification information, set up the S101 tunnel of this subscriber equipment with the target access network of second network according to the target access network that obtains second network that target identification unit 11 obtains.
The identification information that obtains the target access network of second network that carries in the message that target identification unit 11 can send according to the target BS of first network finds the target access network of second network, when perhaps can in the message that the target BS of first network sends, not carry the identification information of target access network of second network yet, by initiatively obtaining the identification information of the target access network of second network, do not influence the realization of the embodiment of the invention to the target BS inquiry of first network.
Particularly, obtaining target identification unit 11 can specifically be used for, switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, perhaps after subscriber equipment switches to the target BS of first network by the source base station of first network, obtain the identification information of the target access network of second network that the target BS of first network reports.For example, switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, receive the tracing section updating request message or the switch acknowledgment message of the target BS transmission of first network, obtain the identification information of the target access network of second network that carries in described tracing section updating request message or the switch acknowledgment message; Perhaps, after subscriber equipment switches to the target BS of first network by the source base station of first network, receive the uplink tunnel encapsulation messages of the target BS transmission of first network, obtain the identification information of the target access network of second network that carries in the described uplink tunnel encapsulation messages.
Perhaps, obtaining target identification unit 11 also can specifically be used for, switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, inquire about the identification information of the target access network of second network to the target BS of first network, and obtain the identification information of the target access network of second network that the target BS of first network returns.In this case, obtaining target identification unit 11 can further also be used for, receive the tracing section updating request message or the switch acknowledgment message of the target BS transmission of first network, when determining that described tracing section updating message or switch acknowledgment message are not carried the identification information of target access network of second network, trigger identification information from the target access network of second network to the target BS of first network that inquire about.
In addition, Mobility Management Entity 10 also can further comprise:
Obtain device identification unit 13, be used for distributing to the identification information of subscriber equipment from the source Access Network that the source Mobility Management Entity of first network of the source base station correspondence of the target BS of first network or first network obtains second network;
Tunnel transmission unit 14 is used for sending to by the identification information that the source Access Network that the S101 tunnel of setting up this subscriber equipment of setting up unit, tunnel 12 will obtain second network that device identification unit 13 obtains is distributed to this subscriber equipment the target access network of second network.
The target access network of such second network just can be distributed to the identification information of this subscriber equipment according to the source Access Network of second network, switches with the source Access Network of second network, and is effective to guarantee the pre-registration of user in second network.
A kind of base station 20 can be referring to Figure 11, and Figure 11 is the structural representation of embodiment of the invention base station, comprising:
Generate target identification unit 21, be used to generate the identification information of the target access network of second network; Second network is the network of the subscriber equipment pre-registration in first network that resides under self;
Send target identification unit 22, be used for switching to by the source base station of first network process of self at subscriber equipment, perhaps after subscriber equipment switches to self by the source base station of first network, send the identification information of the target access network that generates second network that target identification unit 21 generates to the Mobility Management Entity of first network of self correspondence.
Sending target identification unit 22 can specifically be used for, switch in the process of self at the source base station of subscriber equipment, send the tracing section updating request message or the switch acknowledgment message of the identification information of the target access network that carries second network to the Mobility Management Entity of first network of self correspondence by first network; Perhaps,
Sending target identification unit 22 can specifically be used for, receive the request of identification information of the target access network of inquiry second network that the Mobility Management Entity of first network of self correspondence sends, return the identification information of the target access network of second network to the Mobility Management Entity of first network of self correspondence.
Embodiment of the invention device can be used for carrying out the described method flow of preceding method embodiment, the invalid beneficial effect that waits in the S101 tunnel after obtaining to avoid being redirected.
Each module of embodiment of the invention equipment can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
One of ordinary skill in the art will appreciate that, realize all or part of flow process in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than method and relevant switching method and apparatus that a kind of S101 tunnel that the embodiment of the invention provided is redirected be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (14)

1. the method that the S101 tunnel is redirected is characterized in that, comprising:
Switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, perhaps after subscriber equipment switched to the target BS of first network by the source base station of first network, the target mobility management entity of first network of the target BS correspondence of first network was obtained the identification information of the target access network of second network from the target BS of first network; Second network is the network of described subscriber equipment pre-registration;
The target mobility management entity of first network is according to the identification information of the target access network of second network, sets up the S101 tunnel of described subscriber equipment with the target access network of second network.
2. method according to claim 1, it is characterized in that, describedly switched to by the source base station of first network in the process of target BS of first network at subscriber equipment, the target mobility management entity of first network of the target BS correspondence of first network is obtained the target access network of second network from the target BS of first network the step of identification information comprises:
The target mobility management entity of first network is obtained the identification information of the target access network of second network that the target BS of first network reports; Perhaps,
The target mobility management entity of first network is inquired about the identification information of the target access network of second network to the target BS of first network, and obtains the identification information of the target access network of second network that the target BS of first network returns.
3. method according to claim 2 is characterized in that, the step of identification information that the target mobility management entity of first network is obtained the target access network of second network that the base station of described first network reports comprises:
The target mobility management entity of first network receives the tracing section updating request message or the switch acknowledgment message of the target BS transmission of first network;
The target mobility management entity of first network is obtained the identification information of the target access network of second network that carries in described tracing section updating request message or the switch acknowledgment message.
4. method according to claim 2 is characterized in that, the target mobility management entity of first network comprised inquire about the step of identification information of target access network of second network to the target BS of first network before:
The target mobility management entity of first network receives the tracing section updating request message or the switch acknowledgment message of the target BS transmission of first network;
The target mobility management entity of first network determines not carry in described tracing section updating request message or the switch acknowledgment message identification information of the target access network of second network, then triggers the step of identification information of inquiring about the target access network of second network to the target BS of first network.
5. method according to claim 1, it is characterized in that, described after subscriber equipment switches to the target BS of first network by the source base station of first network, the target mobility management entity of first network is obtained the target access network of second network from the target BS of first network the step of identification information comprises:
The target mobility management entity of first network receives the uplink tunnel encapsulation messages of the target BS transmission of first network;
The target mobility management entity of first network is obtained the identification information of the target access network of second network that described uplink tunnel encapsulation messages carries.
6. according to any described method of claim 1～5, it is characterized in that described method also comprises:
The source Access Network that the target mobility management entity of first network is obtained second network from the source Mobility Management Entity of first network of the source base station correspondence of the target BS of first network or first network is distributed to the identification information of described subscriber equipment, and the identification information of the source Access Network of second network being distributed to described subscriber equipment by described S101 tunnel sends to the target access network of second network;
The target access network of second network is distributed to the identification information of described subscriber equipment according to the source Access Network of second network, switches with the source Access Network of second network.
7. a Mobility Management Entity is characterized in that, comprising:
Obtain the target identification unit, be used for switching to by the source base station of first network process of the target BS of first network at subscriber equipment, perhaps after subscriber equipment switches to the target BS of first network by the source base station of first network, obtain the identification information of the target access network of second network from the target BS of first network; Second network is the network of described subscriber equipment pre-registration;
Set up the unit, tunnel, be used for the identification information that obtains the target access network of second network that the target identification unit obtains according to described, set up the S101 tunnel of described subscriber equipment with the target access network of second network.
8. Mobility Management Entity according to claim 7 is characterized in that,
The described target identification unit that obtains specifically is used for, switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, perhaps after subscriber equipment switches to the target BS of first network by the source base station of first network, obtain the identification information of the target access network of second network that the target BS of first network reports.
9. Mobility Management Entity according to claim 8 is characterized in that,
The described target identification unit that obtains further specifically is used for, switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, receive the tracing section updating request message or the switch acknowledgment message of the target BS transmission of first network, obtain the identification information of the target access network of second network that carries in described tracing section updating request message or the switch acknowledgment message;
Perhaps,
The described target identification unit that obtains further specifically is used for, after subscriber equipment switches to the target BS of first network by the source base station of first network, receive the uplink tunnel encapsulation messages of the target BS transmission of first network, obtain the identification information of the target access network of second network that carries in the described uplink tunnel encapsulation messages.
10. Mobility Management Entity according to claim 7 is characterized in that,
The described target identification unit that obtains specifically is used for, switch to by the source base station of first network in the process of target BS of first network at subscriber equipment, inquire about the identification information of the target access network of second network to the target BS of first network, and obtain the identification information of the target access network of second network that the target BS of first network returns.
11. Mobility Management Entity according to claim 10 is characterized in that,
The described target identification unit that obtains also is used for, receive the tracing section updating request message or the switch acknowledgment message of the target BS transmission of first network, when determining that described tracing section updating message or switch acknowledgment message are not carried the identification information of target access network of second network, trigger identification information from the target access network of second network to the target BS of first network that inquire about.
12. according to any described Mobility Management Entity of claim 7～11, it is characterized in that, also comprise:
Obtain the device identification unit, be used for distributing to the identification information of described subscriber equipment from the source Access Network that the source Mobility Management Entity of first network of the source base station correspondence of the target BS of first network or first network obtains second network;
The tunnel transmission unit is used for sending to by the identification information that described subscriber equipment is distributed to the described source Access Network that obtains second network that the device identification unit obtains in the described S101 tunnel of setting up the described subscriber equipment of setting up the unit, tunnel the target access network of second network.
13. a base station is characterized in that, comprising:
Generate the target identification unit, be used to generate the identification information of the target access network of second network; Second network is the network of the subscriber equipment pre-registration in first network that resides under self;
Send the target identification unit, be used for switching to by the source base station of first network process of self at subscriber equipment, perhaps after subscriber equipment switches to self by the source base station of first network, send the identification information of the target access network of second network that described generation target identification unit generates to the Mobility Management Entity of first network of self correspondence.
14. base station according to claim 13 is characterized in that,
Described transmission target identification unit specifically is used for, switch in the process of self at the source base station of subscriber equipment, send the tracing section updating request message or the switch acknowledgment message of the identification information of the target access network that carries second network to the Mobility Management Entity of first network of self correspondence by first network;
Perhaps,
Described transmission target identification unit specifically is used for, receive the request of sign of the target access network of inquiry second network that the Mobility Management Entity of first network of self correspondence sends, return the identification information of the target access network of second network to the Mobility Management Entity of first network of self correspondence.
CN2009101187809A 2009-03-11 2009-03-11 Redirecting method of S101 tunnel and related device thereof Expired - Fee Related CN101835134B (en)

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